Refactor and test Variable Server.

- Split VariableServerThread into VariableServerSession and VariableReference classes
- Use C++ streams for data handling
- Unit tests

.gitignore

@@ -40,4 +40,6 @@ archive/
 trickops_logs/
 *.gcda
 *.gcno
-coverage.info
+coverage.info
+*.dSYM
+

Makefile

@@ -95,6 +95,7 @@ UTILS_DIRS := \
 	${TRICK_HOME}/trick_source/trick_utils/interpolator \
 	${TRICK_HOME}/trick_source/trick_utils/trick_adt \
 	${TRICK_HOME}/trick_source/trick_utils/comm \
+	${TRICK_HOME}/trick_source/trick_utils/connection_handlers \
 	${TRICK_HOME}/trick_source/trick_utils/shm \
 	${TRICK_HOME}/trick_source/trick_utils/math \
 	${TRICK_HOME}/trick_source/trick_utils/units \
@@ -105,6 +106,7 @@ UTILS_OBJS := $(addsuffix /object_$(TRICK_HOST_CPU)/*.o ,$(UTILS_DIRS))
 
 # filter out the directories that make their own libraries
 UTILS_OBJS := $(filter-out ${TRICK_HOME}/trick_source/trick_utils/comm/%, $(UTILS_OBJS))
+UTILS_OBJS := $(filter-out ${TRICK_HOME}/trick_source/trick_utils/connection_handlers/%, $(UTILS_OBJS))
 UTILS_OBJS := $(filter-out ${TRICK_HOME}/trick_source/trick_utils/math/%, $(UTILS_OBJS))
 UTILS_OBJS := $(filter-out ${TRICK_HOME}/trick_source/trick_utils/units/%, $(UTILS_OBJS))
 UTILS_OBJS := $(filter-out ${TRICK_HOME}/trick_source/trick_utils/var_binary_parser/%, $(UTILS_OBJS))
@@ -458,6 +460,7 @@ uninstall:
 	rm -f ${PREFIX}/$(notdir ${TRICK_LIB_DIR})/liber7_utils.a
 	rm -f ${PREFIX}/$(notdir ${TRICK_LIB_DIR})/libtrick.a
 	rm -f ${PREFIX}/$(notdir ${TRICK_LIB_DIR})/libtrick_comm.a
+	rm -f ${PREFIX}/$(notdir ${TRICK_LIB_DIR})/libtrick_connection_handlers.a
 	rm -f ${PREFIX}/$(notdir ${TRICK_LIB_DIR})/libtrick_math.a
 	rm -f ${PREFIX}/$(notdir ${TRICK_LIB_DIR})/libtrick_mm.a
 	rm -f ${PREFIX}/$(notdir ${TRICK_LIB_DIR})/libtrick_pyip.a

include/trick/ClientConnection.hh

@@ -0,0 +1,43 @@
+/************************************************************************
+PURPOSE: (Abstract base class for a connection to a client. Should
+be inherited by variable server and web server connections. )
+LIBRARY DEPENDENCIES:
+    () )
+**************************************************************************/
+
+#ifndef CLIENT_CONNECTION_HH
+#define CLIENT_CONNECTION_HH
+
+#include <string>
+// #include <atomic>
+
+namespace Trick {
+    class ClientConnection {
+        public: 
+            // Should this be here? ¯\_(ツ)_/¯
+            enum ConnectionType { TCP, UDP, MCAST, WS } ;
+
+            virtual int initialize() = 0;
+
+            virtual int write (const std::string& message) = 0;
+            virtual int write (char * message, int size) = 0;
+
+            virtual std::string read  (int max_len = MAX_CMD_LEN) = 0;
+
+            virtual int disconnect () = 0;
+            virtual std::string get_client_tag () = 0;
+            virtual int set_client_tag(std::string tag) = 0;
+            virtual int setBlockMode (int mode) = 0;
+            
+            static const unsigned int MAX_CMD_LEN = 200000 ;
+
+        protected:
+            ConnectionType _connection_type;
+
+            // RHEL appears to have an issue with std::atomic
+            // std::atomic_bool _is_initialized;
+
+    };
+}
+
+#endif

include/trick/ClientListener.hh

@@ -0,0 +1,47 @@
+#ifndef CLIENT_LISTENER_HH
+#define CLIENT_LISTENER_HH
+
+#include "trick/tc.h"
+#include "trick/TCConnection.hh"
+#include <string>
+
+namespace Trick {
+    
+    class TCConnection;
+
+    class ClientListener {
+        public:
+            ClientListener ();
+            ~ClientListener ();
+
+            // We'll see if we need separate methods for these
+            int initialize(std::string hostname, int port);
+            int initialize();
+
+            int setBlockMode(TCCommBlocking mode);
+
+            bool checkForNewConnections();
+
+            const char * getHostname ();
+
+            int getPort();
+
+            int disconnect();
+
+            int checkSocket();
+
+            bool validateSourceAddress(std::string source_address);
+
+            bool isInitialized(); 
+
+            friend int accept(ClientListener* listener, TCConnection* connection);
+
+        private:
+            TCDevice _listen_dev;
+            std::string saved_source;
+            int port;
+            bool initialized;
+    };
+}
+
+#endif

include/trick/MulticastManager.hh

@@ -0,0 +1,28 @@
+/*
+    PURPOSE: ( Encapsulate multicast functionality. )
+*/
+
+#include <string>
+#include <vector>
+#include <arpa/inet.h>
+
+namespace Trick {
+    class MulticastManager {
+        public:
+            MulticastManager();
+            ~MulticastManager();
+            
+            int broadcast (std::string message);
+            int addAddress (std::string addr, int port);
+            int restart ();
+            int initialize();
+            int is_initialized();
+
+
+        private:
+            std::vector<struct sockaddr_in> addresses;           /**<  trick_io(**) Addresses to multicast to. */
+            int mcast_socket;                                    /**<  trick_io(**) Socket opened in initialization. */
+            int initialized;                                     /**<  trick_io(**) Whether manager is ready */
+
+    };
+}

include/trick/TCConnection.hh

@@ -0,0 +1,48 @@
+#ifndef TC_CONNECTION_HH
+#define TC_CONNECTION_HH
+
+/*
+    PURPOSE: ( Encapsulate a connection with TrickComm. )
+*/
+
+#include "trick/ClientConnection.hh"
+#include "trick/ClientListener.hh"
+#include "tc.h"
+
+
+namespace Trick {
+    
+    class ClientListener;
+
+    class TCConnection : public ClientConnection {
+        public:
+
+            TCConnection ();
+
+            int initialize() override;
+
+            int write (const std::string& message) override;
+            int write (char * message, int size) override;
+
+            std::string read  (int max_len) override;
+
+            int disconnect () override;
+            std::string get_client_tag () override;
+            int set_client_tag(std::string tag) override;
+            int get_socket();
+
+            int setBlockMode(int block_mode) override;
+            int setErrorReporting (bool on);
+
+            static const unsigned int MAX_CMD_LEN = 200000 ;
+
+            friend int accept(ClientListener* listener, TCConnection* connection);
+
+        private:
+            TCDevice _device;   /**<  trick_io(**) */
+    };
+
+    int accept(ClientListener* listener, TCConnection* connection);
+}
+
+#endif

include/trick/VariableReference.hh

@@ -0,0 +1,99 @@
+/*************************************************************************
+PURPOSE: (A variable server variable reference. Refactor of VariableReference
+ based on the VariableServerVariable class previously in the webserver.)
+**************************************************************************/
+#ifndef VARIABLE_REFERENCE_HH
+#define VARIABLE_REFERENCE_HH
+
+#include <time.h>
+#include <vector>
+
+#include <iostream>
+#include <trick/reference.h>
+
+#define MAX_ARRAY_LENGTH 4096
+
+union cv_converter ;
+namespace Trick {
+    class VariableReference {
+
+    public:
+        friend std::ostream& operator<< (std::ostream& s, const Trick::VariableReference& ref);
+
+        VariableReference(std::string var_name);
+
+        // Special constructor to deal with time
+        VariableReference(std::string var_name, double* time);
+
+        ~VariableReference();
+
+        const char* getName() const;
+        TRICK_TYPE getType() const;
+
+        // There are 2 different "units" variables used - REF2->units and REF2->attr->units
+        // REF2->attr->units should not be changed, it is what the variable is represented in internally
+        // REF2->units is the unit that has been requested by the variable server client
+        // REF2->units should be null unless var_units or var_add with units is called
+        // We'll refer to REF2->attr->units as BaseUnits and REF2->units as RequestedUnits
+        // Encapsulate all of this away so that no one else has to think about ref->attr->units vs ref->units
+        // ^ TODO: this is not where the above documentation should be. put it somewhere else.
+        const char* getBaseUnits() const;
+        int setRequestedUnits(std::string new_units);
+
+        // These variables have 2 staging buffers that we can swap between to allow for different copy and write-out modes
+        // stageValue copies data from the simulation into one of the buffers (stage_buffer)
+        // prepareForWrite swaps the pointers for stage_buffer and write_buffer
+        // This way we can have data ready for writing, but also be copying out from the sim at the same time
+        // stageValue must be called first, and then prepare for write, and then writeValue* can be called.
+        int stageValue(bool validate_address = false);
+        int prepareForWrite();
+        bool isStaged() const;
+        bool isWriteReady() const;
+
+        // Write out the value to the given outstream.
+        // write_ready must be true
+        int getSizeAscii() const;
+        int getSizeBinary() const;
+        int writeValueAscii( std::ostream& out ) const;
+        int writeValueBinary( std::ostream& out , bool byteswap = false) const;
+        int writeNameBinary( std::ostream& out, bool byteswap = false) const;
+        int writeSizeBinary( std::ostream& out, bool byteswap = false) const;
+        int writeTypeBinary( std::ostream& out, bool byteswap = false) const;
+
+        bool validate();
+        void tagAsInvalid();
+
+        // Helper method for byteswapping
+        static void byteswap_var (char * out, char * in, const VariableReference& ref);
+
+        // TODO: Some system for error messaging
+
+    private:
+        VariableReference();
+        void byteswap_var(char * out, char * in) const;
+
+        // Error refs
+        static REF2* make_error_ref(std::string in_name);
+        static REF2* make_do_not_resolve_ref(std::string in_name);
+
+        static int bad_ref_int;
+        static int do_not_resolve_bad_ref_int;
+
+        REF2 *var_info;  
+        void *address;                      // -- address of data copied to buffer
+        int   size;                         // -- size of data copied to buffer
+        bool  deref;                        // -- indicates whether variable is pointer that needs to be dereferenced
+        cv_converter * conversion_factor ;  // ** udunits conversion factor
+        TRICK_TYPE trick_type ;             // -- Trick type of this variable
+
+        // TODO: use atomics for these
+        bool staged;
+        bool write_ready;
+
+        void *stage_buffer;
+        void *write_buffer;  
+    };
+
+    std::ostream& operator<< (std::ostream& s, const Trick::VariableReference& ref);
+}
+#endif

include/trick/VariableServer.hh

@@ -107,17 +107,33 @@ namespace Trick {
             */
             void add_vst(pthread_t thread_id, VariableServerThread * in_vst ) ;
 
+            /**
+             @brief Adds a vst to the map.
+            */
+            void add_session(pthread_t thread_id, VariableServerSession * in_session ) ;
+
             /**
              @brief Get a vst mapped by thread id
              @return the VariableServerThread mapped to the thread id if found, or NULL if not found.
             */
             Trick::VariableServerThread * get_vst(pthread_t thread_id) ;
 
+            /**
+             @brief Get a session mapped by thread id
+             @return the VariableServerSession mapped to the thread id if found, or NULL if not found.
+            */
+            Trick::VariableServerSession * get_session(pthread_t thread_id) ;
+
             /**
              @brief Delete a vst in the map
             */
             void delete_vst(pthread_t thread_id) ;
 
+            /**
+             @brief Delete a session in the map
+            */
+            void delete_session(pthread_t thread_id) ;
+
             /**
              @brief @userdesc Return host name from the listen device.
              @par Python Usage:
@@ -283,6 +299,7 @@ namespace Trick {
 
             /** Map thread id to the VariableServerThread object.\n */
             std::map < pthread_t , VariableServerThread * > var_server_threads ; /**<  trick_io(**) */
+            std::map < pthread_t , VariableServerSession * > var_server_sessions ; /**<  trick_io(**) */
 
             /** Mutex to ensure only one thread manipulates the map of var_server_threads\n */
             pthread_mutex_t map_mutex ;     /**<  trick_io(**) */
@@ -295,8 +312,6 @@ namespace Trick {
 
 }
 
-int vs_format_ascii(Trick::VariableReference * var, char *value, size_t value_size);
-
 Trick::VariableServer * var_server_get_var_server() ;
 
 // external calls to be made available from input processor
@@ -331,8 +346,8 @@ int var_set_freeze_frame_multiple(unsigned int mult) ;
 int var_set_freeze_frame_offset(unsigned int offset) ;
 int var_byteswap(bool on_off) ;
 
-int var_signal() ;
-int var_multicast(bool on_off) ;
+// int var_signal() ;
+// int var_multicast(bool on_off) ;
 
 int var_send_list_size() ;
 

include/trick/VariableServerListenThread.hh

@@ -8,8 +8,11 @@
 
 #include <string>
 #include <iostream>
-#include "trick/tc.h"
+// #include "trick/tc.h"
+#include "trick/ClientListener.hh"
 #include "trick/SysThread.hh"
+#include "trick/MulticastManager.hh"
+
 
 namespace Trick {
 
@@ -41,8 +44,6 @@ namespace Trick {
             virtual int init_listen_device() ;
             virtual int check_and_move_listen_device() ;
 
-            void create_tcp_socket(const char * address, unsigned short in_port ) ;
-
             virtual void * thread_body() ;
 
             int restart() ;
@@ -51,17 +52,21 @@ namespace Trick {
             void pause_listening() ;
             void restart_listening() ;
 
+            void create_tcp_socket(const char * address, unsigned short in_port ) ;
+
             virtual void dump( std::ostream & oss = std::cout ) ;
 
         protected:
+            void initializeMulticast();
+
             /** Requested variable server source address\n */
-            std::string source_address ;       /**<  trick_units(--) */
+            std::string requested_source_address ;       /**<  trick_units(--) */
 
             /** Requested variable server port number.\n */
-            unsigned short port ;       /**<  trick_units(--) */
+            unsigned short requested_port ;       /**<  trick_units(--) */
 
             /** User requested specific port number\n */
-            bool user_port_requested ;  /**<  trick_units(--) */
+            bool user_requested_address ;  /**<  trick_units(--) */
 
             /** User defined unique tag to easily identify this variable server port.\n */
             std::string user_tag;          /**<  trick_units(--) */
@@ -69,8 +74,11 @@ namespace Trick {
             /** Turn on/off broadcasting of variable server port.\n */
             bool broadcast ;       /**<  trick_units(--) */
 
-            /** The listen device\n */
-            TCDevice listen_dev;        /**<  trick_io(**) */
+            /** The listen device */
+            ClientListener listener;
+
+            /* Multicast broadcaster */
+            MulticastManager multicast;
 
             /** The mutex to stop accepting new connections during restart\n */
             pthread_mutex_t restart_pause ;     /**<  trick_io(**) */

include/trick/VariableServerReference.hh

@@ -1,44 +0,0 @@
-/*
-    PURPOSE:
-        (VariableServerReference)
-*/
-
-#ifndef VARIABLESERVERREFERENCE_HH
-#define VARIABLESERVERREFERENCE_HH
-
-#include <iostream>
-#include "trick/reference.h"
-
-union cv_converter ;
-
-#define MAX_ARRAY_LENGTH 4096
-
-namespace Trick {
-
-/**
-  This class provides reference information for variables requested from the variable server by the client.
-  @author Alex Lin
- */
-
-    class VariableReference {
-        public:
-            VariableReference(REF2 * in_ref) ;
-            ~VariableReference() ;
-
-            friend std::ostream& operator<< (std::ostream& s, const Trick::VariableReference& vref);
-
-            /** Pointer to trick variable reference structure.\n */
-            REF2 * ref ;
-            cv_converter * conversion_factor ; // ** udunits conversion factor
-            void * buffer_in ;
-            void * buffer_out ;
-            void * address ;          // -- address of data copied to buffer
-            int size ;                // -- size of data copied to buffer
-            TRICK_TYPE string_type ;  // -- indicate if this is a string or wstring
-            bool need_deref ;         // -- inidicate this is a painter to be dereferenced
-    } ;
-
-}
-
-#endif
-

include/trick/VariableServerSession.hh

@@ -0,0 +1,481 @@
+/*************************************************************************
+PURPOSE: (Represent the state of a variable server connection.)
+**************************************************************************/
+
+#ifndef WSSESSION_HH
+#define WSSESSION_HH
+
+#include <vector>
+#include <string>
+
+#include "trick/VariableReference.hh"
+#include "trick/ClientConnection.hh"
+#include "trick/variable_server_sync_types.h"
+#include "trick/tc.h"
+#include "trick/variable_server_message_types.h"
+
+
+namespace Trick {
+    class VariableServerSession {
+    public:
+        VariableServerSession(ClientConnection * connection);
+        ~VariableServerSession();
+
+        friend std::ostream& operator<< (std::ostream& s, const Trick::VariableServerSession& session);
+
+        int  handleMessage();
+
+        /**
+         @brief @userdesc Command to add a variable to a list of registered variables for value retrieval.
+            The variable server will immediately begin returning the variable values to the client at a
+            frequency according to var_cycle.
+            @par Python Usage:
+            @code trick.var_add("<in_name>") @endcode
+            @param in_name - the variable name to retrieve
+            @return always 0
+        */
+        int var_add( std::string in_name ) ;
+
+        /**
+         @brief @userdesc Command to add a variable to a list of registered variables for value retrieval,
+            and also instructs the variable server to return the value in the specified measurement units.
+            The unit specification will be returned after the variable's value (var_ascii mode only).
+            Specifying units as "{xx}" will use the unit specification from the variable's model code declaration,
+            which is essentially a method of querying a variable's unit specification.
+            The variable server will immediately begin returning the variable values/units to the client at
+            a frequency according to var_cycle.
+            @par Python Usage:
+            @code trick.var_add("<in_name>", "<units_name>") @endcode
+            @param in_name - the variable name to retrieve
+            @param units_name - the desired units, specified within curly braces
+            @return always 0
+        */
+        int var_add( std::string in_name, std::string units_name ) ;
+
+        /**
+         @brief @userdesc Command to remove a variable (previously registered with var_add)
+            from the list of registered variables for value retrieval.
+            @par Python Usage:
+            @code trick.var_remove("<in_name>") @endcode
+            @param in_name - the variable name to remove
+            @return always 0
+        */
+        int var_remove( std::string in_name ) ;
+
+        /**
+         @brief @userdesc Command to instruct the variable server to return the value of a variable
+            in the specified units (var_ascii mode only).
+            The variable must have been previously registered with the var_add command.
+            The unit specification will be returned after the variable's value.
+            @par Python Usage:
+            @code trick.var_units("<var_name>", "<units_name>") @endcode
+            @param var_name - the variable name previously registered with var_add
+            @param units_name - the desired units, specified within curly braces
+            @return always 0
+            @note trick.var_add("my_object.my_variable"); trick.var_units("my_object.my_variable","{m}")
+            is the same as trick.var_add("my_object.my_variable","{m}")
+        */
+        int var_units(std::string var_name , std::string units_name) ;
+
+        /**
+         @brief @userdesc Command to instruct the variable server to send a Boolean value indicating
+            whether the specified variable exists
+            (is a Trick processed variable in the current simulation).
+            - var_binary mode: the message indicator is 1, and the returned value is a binary 0 or 1.
+            - var_ascii mode: the message indicator is "1" followed by a tab, then an ASCII "0" or "1" returned value.
+            .
+            @par Python Usage:
+            @code trick.var_exists("<in_name>") @endcode
+            @param in_name - the variable name to query
+            @return always 0
+        */
+        int var_exists( std::string in_name ) ;
+
+        /**
+         @brief @userdesc Command to immediately send the value of a comma separated list of variables
+            @par Python Usage:
+            @code trick.var_send_once("<in_name_list>", <number of variables in list>) @endcode
+            @param in_name_list - the variables name to retrieve, comma separated
+            @param num_vars - number of vars in in_name_list
+            @return always 0
+        */
+        int var_send_once(std::string in_name_list, int num_vars);
+
+        /**
+         @brief @userdesc Command to instruct the variable server to immediately send back the values of
+            variables that are registered with the var_add command
+            (typically used when var_pause is in effect). Each var_send command sends back all current values
+            once instead of cyclically.
+            @par Python Usage:
+            @code trick.var_send() @endcode
+            @return always 0
+        */
+        int var_send() ;
+
+        /**
+         @brief @userdesc Command to remove all variables from the list of variables currently
+            registered with the var_add command,
+            so the variable server will no longer send cyclic values until new var_add commands are issued.
+            @par Python Usage:
+            @code trick.var_clear() @endcode
+            @return always 0
+        */
+        int var_clear() ;
+
+        /**
+         @brief @userdesc Turns on validating addresses before they are referenced
+            @par Python Usage:
+            @code trick.var_validate_address() @endcode
+            @return always 0
+        */
+        int var_validate_address(bool on_off) ;
+
+        /**
+         @brief @userdesc Command to instruct the variable server to output debug information.
+            @par Python Usage:
+            @code trick.var_debug(<level>) @endcode
+            @return always 0
+            @param level - 1,2,or 3, higher number increases amount of info output
+        */
+        int var_debug(int level) ;
+
+        /**
+         @brief @userdesc Command to instruct the variable server to return values in ASCII format (this is the default).
+            @par Python Usage:
+            @code trick.var_ascii() @endcode
+            @return always 0
+        */
+        int var_ascii() ;
+
+        /**
+         @brief @userdesc Command to instruct the variable server to return values in binary format.
+            @par Python Usage:
+            @code trick.var_binary() @endcode
+            @return always 0
+        */
+        int var_binary() ;
+
+        /**
+         @brief @userdesc Command to instruct the variable server to return values in binary format,
+            but saves space in the returned messages
+            by omitting the variable names.
+            @par Python Usage:
+            @code trick.var_binary_nonames() @endcode
+            @return always 0
+        */
+        int var_binary_nonames() ;
+
+        /**
+         @brief @userdesc Command to tell the server when to copy data
+            - VS_COPY_ASYNC = copies data asynchronously. (default)
+            - VS_COPY_SCHEDULED = copies data as an automatic_last job in main thread
+            - VS_COPY_TOP_OF_FRAME = copies data at top of frame
+            @par Python Usage:
+            @code trick.var_set_copy_mode(<mode>) @endcode
+            @param mode - One of the above enumerations
+            @return 0 if successful, -1 if error
+        */
+        int var_set_copy_mode(int on_off) ;
+
+        /**
+         @brief @userdesc Command to tell the server when to copy data
+            - VS_WRITE_ASYNC = writes data asynchronously. (default)
+            - VS_WRITE_WHEN_COPIED = writes data as soon as it's copied from sim
+            @par Python Usage:
+            @code trick.var_set_write_mode(<mode>) @endcode
+            @param mode - One of the above enumerations
+            @return 0 if successful, -1 if error
+        */
+        int var_set_write_mode(int on_off) ;
+
+        /**
+         @brief @userdesc Command to put the current variable server/client connection in sync mode,
+            so that values to be sent to the client
+            are guaranteed to be homogenous, that is from the same execution frame (the default is asynchronous).
+            - async/async mode: the variable server thread itself copies the client data,
+            independent of the execution frame so may not be homogenous.
+            - sync/async mode: a variable server automatic_last job retrieves client requested data.
+            Data is sent asynchronously on separate thread.
+            - sync/sync mode: a variable server automatic_last job retrieves client requested data.
+            Data is sent in same automatic_last job.
+            .
+            @par Python Usage:
+            @code trick.var_sync(<on_off>) @endcode
+            @param on_off - 0 = fully asynchronous. 1 = sync data gather, async socket write.
+            2 = sync data gather, sync socket write
+            @return always 0
+        */
+        int var_sync(int on_off) ;
+
+        /**
+         @brief @userdesc Set the frame multiple
+            @par Python Usage:
+            @code trick.var_set_frame_multiple(<mult>) @endcode
+            @param mult - The requested multiple
+            @return 0
+        */
+        int var_set_frame_multiple(unsigned int mult) ;
+
+        /**
+         @brief @userdesc Set the frame offset
+            @par Python Usage:
+            @code trick.var_set_frame_offset(<offset>) @endcode
+            @param offset - The requested offset
+            @return 0
+        */
+        int var_set_frame_offset(unsigned int offset) ;
+
+        /**
+         @brief @userdesc Set the frame multiple
+            @par Python Usage:
+            @code trick.var_set_freeze_frame_multiple(<mult>) @endcode
+            @param mult - The requested multiple
+            @return 0
+        */
+        int var_set_freeze_frame_multiple(unsigned int mult) ;
+
+        /**
+         @brief @userdesc Set the frame offset
+            @par Python Usage:
+            @code trick.var_set_freeze_frame_offset(<offset>) @endcode
+            @param offset - The requested offset
+            @return 0
+        */
+        int var_set_freeze_frame_offset(unsigned int offset) ;
+
+        /**
+         @brief @userdesc Command to instruct the variable server to byteswap the return values
+            (only has an effect in var_binary mode).
+            The default is no byteswap - it is assumed server and client are same endianness.
+            If not, the user must issue the var_byteswap command.
+            @par Python Usage:
+            @code trick.var_byteswap(<on_off>) @endcode
+            @param on_off - true (or 1) to byteswap the return data, false (or 0) to return data as is
+            @return always 0
+        */
+        int var_byteswap(bool on_off) ;
+
+        /**
+         @brief @userdesc Command to turn on variable server logged messages to a playback file.
+            All messages received from all clients will be saved to file named "playback" in the RUN directory.
+            @par Python Usage:
+            @code trick.set_log_on() @endcode
+            @return always 0
+        */
+        int set_log_on() ;
+
+        /**
+         @brief @userdesc Command to turn off variable server logged messages to a playback file.
+            @par Python Usage:
+            @code trick.set_log_off() @endcode
+            @return always 0
+        */
+        int set_log_off() ;
+
+        /**
+         @brief Command to send the number of items in the var_add list.
+            The variable server sends a message indicator of "3", followed by the total number of variables being sent.
+        */
+        int send_list_size();
+
+        /**
+         @brief Special command to instruct the variable server to send the contents of the S_sie.resource file; used by TV.
+            The variable server sends a message indicator of "2", followed by a tab, followed by the file contents
+            which are then sent as sequential ASCII messages with a maximum size of 4096 bytes each.
+        */
+        int send_sie_resource();
+
+        /**
+         @brief Special command to only send the class sie class information
+        */
+        int send_sie_class();
+
+        /**
+         @brief Special command to only send the enumeration sie class information
+        */
+        int send_sie_enum();
+
+        /**
+         @brief Special command to only send the top level objects sie class information
+        */
+        int send_sie_top_level_objects();
+
+        /**
+         @brief Special command to send an arbitrary file through the variable server.
+        */
+        int send_file(std::string file_name);
+
+        /**
+         @brief gets the send_stdio flag.
+        */
+        bool get_send_stdio() ;
+
+        /**
+         @brief sets the send_stdio flag.
+        */
+        int set_send_stdio(bool on_off) ;
+
+        /**
+         @brief @userdesc Command to set the frequencty at which the variable server will send values
+            of variables that have been registered using
+            the var_add command. If var_cycle is not specified, the default cycle is 0.1 seconds.
+            @par Python Usage:
+            @code trick.var_cycle(<in_cycle>) @endcode
+            @param in_cycle - the desired frequency in seconds
+            @return always 0
+        */
+        int var_cycle(double in_cycle) ;
+
+        /**
+         @brief Get the pause state of this thread.
+        */
+        bool get_pause() ;
+
+        /**
+         @brief Set the pause state of this thread.
+        */
+        void set_pause(bool on_off) ;
+
+        /**
+         @brief Write data in the appropriate format (var_ascii or var_binary) from variable output buffers to socket.
+        */
+        int write_data();
+
+        /**
+         @brief Write data from the given var only to the appropriate format (var_ascii or var_binary) from variable output buffers to socket.
+        */
+        int write_data(std::vector<VariableReference *>& var, VS_MESSAGE_TYPE message_type) ;
+
+        /**
+         @brief Copy client variable values from Trick memory to each variable's output buffer.
+        */
+        int copy_sim_data();
+
+        /**
+         @brief Copy given variable values from Trick memory to each variable's output buffer.
+            cyclical indicated whether it is a normal cyclical copy or a send_once copy
+        */
+        int copy_sim_data(std::vector<VariableReference *>& given_vars, bool cyclical);
+
+        int var_exit();
+
+        int transmit_file(std::string sie_file);
+
+        int copy_data_freeze();
+        int copy_data_freeze_scheduled(long long curr_tics);
+        int copy_data_scheduled(long long curr_tics);
+        int copy_data_top();
+
+        // VS_COPY_MODE get_copy_mode();
+        // VS_WRITE_MODE get_write_mode();
+
+        void disconnect_references();
+
+        long long get_next_tics() const;
+
+        long long get_freeze_next_tics() const;
+
+        int freeze_init();
+
+        double get_update_rate() const;
+
+        // These should be private probably
+        int write_binary_data(const std::vector<VariableReference *>& given_vars, VS_MESSAGE_TYPE message_type);
+        int write_ascii_data(const std::vector<VariableReference *>& given_vars, VS_MESSAGE_TYPE message_type );
+        int write_stdio(int stream, std::string text);
+
+        VS_WRITE_MODE get_write_mode () const;
+        VS_COPY_MODE get_copy_mode () const;
+
+
+        pthread_mutex_t copy_mutex;     /**<  trick_io(**) */
+
+        /** Toggle to indicate var_exit commanded.\n */
+        bool exit_cmd ;                  /**<  trick_io(**) */
+
+    private:
+        // int sendErrorMessage(const char* fmt, ... );
+        // int sendSieMessage(void);
+        // int sendUnitsMessage(const char* vname);
+
+        ClientConnection * connection;  /**<  trick_io(**) */
+        /** The trickcomm device used for the connection to the client.\n */
+
+        VariableReference * find_session_variable(std::string name) const;
+
+        double stageTime;
+        bool dataStaged;
+
+        std::vector<VariableReference *> session_variables; /**<  trick_io(**) */
+        bool cyclicSendEnabled;         /**<  trick_io(**) */
+        long long nextTime;             /**<  trick_io(**) */
+        long long intervalTimeTics;     /**<  trick_io(**) */
+
+        /** Value set in var_cycle command.\n */
+        double update_rate ;             /**<  trick_io(**) */
+
+        /** The update rate in integer tics.\n */
+        long long cycle_tics ;           /**<  trick_io(**) */
+
+        /** The next call time in integer tics of the job to copy client data (sync mode).\n */
+        long long next_tics ;            /**<  trick_io(**) */
+
+        /** The next call time in integer tics of the job to copy client data (sync mode).\n */
+        long long freeze_next_tics ;     /**<  trick_io(**) */
+
+        /** The simulation time converted to seconds\n */
+        double time ;                    /**<  trick_units(s) */
+
+         /** Toggle to set variable server copy as top_of_frame, scheduled, async \n */
+        VS_COPY_MODE copy_mode ;         /**<  trick_io(**) */
+
+        /** Toggle to set variable server writes as when copied or async.\n */
+        VS_WRITE_MODE write_mode ;       /**<  trick_io(**) */
+
+        /** multiples of frame_count to copy data.  Only used at top_of_frame\n */
+        int frame_multiple ;             /**<  trick_io(**) */
+
+        /** multiples of frame_count to copy data.  Only used at top_of_frame\n */
+        int frame_offset ;               /**<  trick_io(**) */
+
+        /** multiples of frame_count to copy data.  Only used at top_of_frame\n */
+        int freeze_frame_multiple ;      /**<  trick_io(**) */
+
+        /** multiples of frame_count to copy data.  Only used at top_of_frame\n */
+        int freeze_frame_offset ;        /**<  trick_io(**) */
+
+        // The way the modes are handled is confusing. TODO: refactor >:(
+
+        /** Toggle to tell variable server to byteswap returned values.\n */
+        bool byteswap ;                  /**<  trick_io(**) */
+
+        /** Toggle to tell variable server return data in binary format.\n */
+        bool binary_data ;               /**<  trick_io(**) */
+
+        /** Toggle to tell variable server return data in binary format without the variable names.\n */
+        bool binary_data_nonames ;       /**<  trick_io(**) */
+
+        /** Value (1,2,or 3) that causes the variable server to output increasing amounts of debug information.\n */
+        int debug ;                      /**<  trick_io(**) */
+
+        /** Toggle to enable/disable this variable server thread.\n */
+        bool enabled ;                   /**<  trick_io(**) */
+
+        /** Toggle to turn on/off variable server logged messages to a playback file.\n */
+        bool log ;                       /**< trick_io(**)  */
+
+        /** Toggle to indicate var_pause commanded.\n */
+        bool pause_cmd ;                 /**<  trick_io(**) */
+
+        /** Save pause state while reloading a checkpoint.\n */
+        bool saved_pause_cmd ;           /**<  trick_io(**) */
+
+        bool send_stdio;
+
+        bool validate_address;
+
+        int packets_copied;
+    };
+}
+
+#endif

include/trick/VariableServerThread.hh

@@ -11,16 +11,21 @@
 #include <iostream>
 #include <pthread.h>
 #include "trick/tc.h"
+#include "trick/TCConnection.hh"
 #include "trick/SysThread.hh"
-#include "trick/VariableServerReference.hh"
+#include "trick/VariableServerSession.hh"
 #include "trick/variable_server_sync_types.h"
 #include "trick/variable_server_message_types.h"
-
+#include "trick/ClientListener.hh"
 
 namespace Trick {
 
     class VariableServer ;
 
+    /** Flag to indicate the connection has been made\n */
+    enum ConnectionStatus { CONNECTION_PENDING, CONNECTION_SUCCESS, CONNECTION_FAIL };
+
+
 /**
   This class provides variable server command processing on a separate thread for each client.
   @author Alex Lin
@@ -28,15 +33,13 @@ namespace Trick {
     class VariableServerThread : public Trick::SysThread {
 
         public:
-            enum ConnectionType { TCP, UDP, MCAST } ;
-
             friend std::ostream& operator<< (std::ostream& s, Trick::VariableServerThread& vst);
 
             /**
              @brief Constructor.
              @param listen_dev - the TCDevice set up in listen()
             */
-            VariableServerThread(TCDevice * in_listen_dev ) ;
+            VariableServerThread(ClientListener * in_listen_dev ) ;
 
             virtual ~VariableServerThread() ;
             /**
@@ -45,10 +48,12 @@ namespace Trick {
             */
             static void set_vs_ptr(Trick::VariableServer * in_vs) ;
 
+            void set_client_tag(std::string tag);
+
             /**
-             @brief Wait for the connection_accepted flag to be set.
+             @brief Block until thread has accepted connection
             */
-            void wait_for_accept() ;
+            ConnectionStatus wait_for_accept() ;
 
             /**
              @brief The main loop of the variable server thread that reads and processes client commands.
@@ -56,391 +61,12 @@ namespace Trick {
             */
             virtual void * thread_body() ;
 
-            /**
-             @brief @userdesc Command to add a variable to a list of registered variables for value retrieval.
-             The variable server will immediately begin returning the variable values to the client at a
-             frequency according to var_cycle.
-             @par Python Usage:
-             @code trick.var_add("<in_name>") @endcode
-             @param in_name - the variable name to retrieve
-             @return always 0
-            */
-            int var_add( std::string in_name ) ;
-
-            /**
-             @brief @userdesc Command to add a variable to a list of registered variables for value retrieval,
-             and also instructs the variable server to return the value in the specified measurement units.
-             The unit specification will be returned after the variable's value (var_ascii mode only).
-             Specifying units as "{xx}" will use the unit specification from the variable's model code declaration,
-             which is essentially a method of querying a variable's unit specification.
-             The variable server will immediately begin returning the variable values/units to the client at
-             a frequency according to var_cycle.
-             @par Python Usage:
-             @code trick.var_add("<in_name>", "<units_name>") @endcode
-             @param in_name - the variable name to retrieve
-             @param units_name - the desired units, specified within curly braces
-             @return always 0
-            */
-            int var_add( std::string in_name, std::string units_name ) ;
-
-            /**
-             @brief @userdesc Command to remove a variable (previously registered with var_add)
-             from the list of registered variables for value retrieval.
-             @par Python Usage:
-             @code trick.var_remove("<in_name>") @endcode
-             @param in_name - the variable name to remove
-             @return always 0
-            */
-            int var_remove( std::string in_name ) ;
-
-            /**
-             @brief @userdesc Command to instruct the variable server to return the value of a variable
-             in the specified units (var_ascii mode only).
-             The variable must have been previously registered with the var_add command.
-             The unit specification will be returned after the variable's value.
-             @par Python Usage:
-             @code trick.var_units("<var_name>", "<units_name>") @endcode
-             @param var_name - the variable name previously registered with var_add
-             @param units_name - the desired units, specified within curly braces
-             @return always 0
-             @note trick.var_add("my_object.my_variable"); trick.var_units("my_object.my_variable","{m}")
-             is the same as trick.var_add("my_object.my_variable","{m}")
-            */
-            int var_units(std::string var_name , std::string units_name) ;
-
-            /**
-             @brief @userdesc Command to instruct the variable server to send a Boolean value indicating
-             whether the specified variable exists
-             (is a Trick processed variable in the current simulation).
-             - var_binary mode: the message indicator is 1, and the returned value is a binary 0 or 1.
-             - var_ascii mode: the message indicator is "1" followed by a tab, then an ASCII "0" or "1" returned value.
-             .
-             @par Python Usage:
-             @code trick.var_exists("<in_name>") @endcode
-             @param in_name - the variable name to query
-             @return always 0
-            */
-            int var_exists( std::string in_name ) ;
-
-            /**
-             @brief @userdesc Command to immediately send the value of a comma separated list of variables
-             @par Python Usage:
-             @code trick.var_send_once("<in_name_list>", <number of variables in list>) @endcode
-             @param in_name_list - the variables name to retrieve, comma separated
-             @param num_vars - number of vars in in_name_list
-             @return always 0
-            */
-            int var_send_once(std::string in_name_list, int num_vars);
-
-            /**
-             @brief @userdesc Command to instruct the variable server to immediately send back the values of
-             variables that are registered with the var_add command
-             (typically used when var_pause is in effect). Each var_send command sends back all current values
-             once instead of cyclically.
-             @par Python Usage:
-             @code trick.var_send() @endcode
-             @return always 0
-            */
-            int var_send() ;
-
-            /**
-             @brief @userdesc Command to remove all variables from the list of variables currently
-             registered with the var_add command,
-             so the variable server will no longer send cyclic values until new var_add commands are issued.
-             @par Python Usage:
-             @code trick.var_clear() @endcode
-             @return always 0
-            */
-            int var_clear() ;
-
-            /**
-             @brief @userdesc Command to set the frequencty at which the variable server will send values
-             of variables that have been registered using
-             the var_add command. If var_cycle is not specified, the default cycle is 0.1 seconds.
-             @par Python Usage:
-             @code trick.var_cycle(<in_cycle>) @endcode
-             @param in_cycle - the desired frequency in seconds
-             @return always 0
-            */
-            int var_cycle(double in_cycle) ;
-
-            /**
-             @brief Get the pause state of this thread.
-            */
-            bool get_pause() ;
-
-            /**
-             @brief Set the pause state of this thread.
-            */
-            void set_pause(bool on_off) ;
-
-            /**
-             @brief @userdesc Command to terminate the current variable server/client connection.
-             @par Python Usage:
-             @code trick.var_exit() @endcode
-             @return always 0
-            */
-            int var_exit() ;
-
-            /**
-             @brief @userdesc Turns on validating addresses before they are referenced
-             @par Python Usage:
-             @code trick.var_validate_address() @endcode
-             @return always 0
-            */
-            int var_validate_address(bool on_off) ;
-
-            /**
-             @brief @userdesc Command to instruct the variable server to output debug information.
-             @par Python Usage:
-             @code trick.var_debug(<level>) @endcode
-             @return always 0
-             @param level - 1,2,or 3, higher number increases amount of info output
-            */
-            int var_debug(int level) ;
-
-            /**
-             @brief @userdesc Command to instruct the variable server to return values in ASCII format (this is the default).
-             @par Python Usage:
-             @code trick.var_ascii() @endcode
-             @return always 0
-            */
-            int var_ascii() ;
-
-            /**
-             @brief @userdesc Command to instruct the variable server to return values in binary format.
-             @par Python Usage:
-             @code trick.var_binary() @endcode
-             @return always 0
-            */
-            int var_binary() ;
-
-            /**
-             @brief @userdesc Command to instruct the variable server to return values in binary format,
-             but saves space in the returned messages
-             by omitting the variable names.
-             @par Python Usage:
-             @code trick.var_binary_nonames() @endcode
-             @return always 0
-            */
-            int var_binary_nonames() ;
-
-            /**
-             @brief @userdesc Command to tell the server when to copy data
-             - VS_COPY_ASYNC = copies data asynchronously. (default)
-             - VS_COPY_SCHEDULED = copies data as an automatic_last job in main thread
-             - VS_COPY_TOP_OF_FRAME = copies data at top of frame
-             @par Python Usage:
-             @code trick.var_set_copy_mode(<mode>) @endcode
-             @param mode - One of the above enumerations
-             @return 0 if successful, -1 if error
-            */
-            int var_set_copy_mode(int on_off) ;
-
-            /**
-             @brief @userdesc Command to tell the server when to copy data
-             - VS_WRITE_ASYNC = writes data asynchronously. (default)
-             - VS_WRITE_WHEN_COPIED = writes data as soon as it's copied from sim
-             @par Python Usage:
-             @code trick.var_set_write_mode(<mode>) @endcode
-             @param mode - One of the above enumerations
-             @return 0 if successful, -1 if error
-            */
-            int var_set_write_mode(int on_off) ;
-
-            /**
-             @brief @userdesc Command to put the current variable server/client connection in sync mode,
-             so that values to be sent to the client
-             are guaranteed to be homogenous, that is from the same execution frame (the default is asynchronous).
-             - async/async mode: the variable server thread itself copies the client data,
-               independent of the execution frame so may not be homogenous.
-             - sync/async mode: a variable server automatic_last job retrieves client requested data.
-               Data is sent asynchronously on separate thread.
-             - sync/sync mode: a variable server automatic_last job retrieves client requested data.
-               Data is sent in same automatic_last job.
-             .
-             @par Python Usage:
-             @code trick.var_sync(<on_off>) @endcode
-             @param on_off - 0 = fully asynchronous. 1 = sync data gather, async socket write.
-              2 = sync data gather, sync socket write
-             @return always 0
-            */
-            int var_sync(int on_off) ;
-
-            /**
-             @brief @userdesc Set the frame multiple
-             @par Python Usage:
-             @code trick.var_set_frame_multiple(<mult>) @endcode
-             @param mult - The requested multiple
-             @return 0
-            */
-            int var_set_frame_multiple(unsigned int mult) ;
-
-            /**
-             @brief @userdesc Set the frame offset
-             @par Python Usage:
-             @code trick.var_set_frame_offset(<offset>) @endcode
-             @param offset - The requested offset
-             @return 0
-            */
-            int var_set_frame_offset(unsigned int offset) ;
-
-            /**
-             @brief @userdesc Set the frame multiple
-             @par Python Usage:
-             @code trick.var_set_freeze_frame_multiple(<mult>) @endcode
-             @param mult - The requested multiple
-             @return 0
-            */
-            int var_set_freeze_frame_multiple(unsigned int mult) ;
-
-            /**
-             @brief @userdesc Set the frame offset
-             @par Python Usage:
-             @code trick.var_set_freeze_frame_offset(<offset>) @endcode
-             @param offset - The requested offset
-             @return 0
-            */
-            int var_set_freeze_frame_offset(unsigned int offset) ;
-
-            /**
-             @brief @userdesc Command to instruct the variable server to byteswap the return values
-             (only has an effect in var_binary mode).
-             The default is no byteswap - it is assumed server and client are same endianness.
-             If not, the user must issue the var_byteswap command.
-             @par Python Usage:
-             @code trick.var_byteswap(<on_off>) @endcode
-             @param on_off - true (or 1) to byteswap the return data, false (or 0) to return data as is
-             @return always 0
-            */
-            int var_byteswap(bool on_off) ;
-
-            /**
-             @brief CURRENTLY NOT IMPLEMENTED
-            */
-            int var_signal() ;
-
-            /**
-             @brief @userdesc Command to turn on variable server logged messages to a playback file.
-             All messages received from all clients will be saved to file named "playback" in the RUN directory.
-             @par Python Usage:
-             @code trick.set_log_on() @endcode
-             @return always 0
-            */
-            int set_log_on() ;
-
-            /**
-             @brief @userdesc Command to turn off variable server logged messages to a playback file.
-             @par Python Usage:
-             @code trick.set_log_off() @endcode
-             @return always 0
-            */
-            int set_log_off() ;
-
-            /**
-             @brief CURRENTLY NOT IMPLEMENTED\n
-             Command to instruct the variable server to send values via multicast socket.
-            */
-            int var_multicast(bool on_off) ;
-
-            /**
-             @brief Command to send the number of items in the var_add list.
-             The variable server sends a message indicator of "3", followed by the total number of variables being sent.
-            */
-            int send_list_size();
-
-            /**
-             @brief Special command to instruct the variable server to send the contents of the S_sie.resource file; used by TV.
-             The variable server sends a message indicator of "2", followed by a tab, followed by the file contents
-             which are then sent as sequential ASCII messages with a maximum size of 4096 bytes each.
-            */
-            int send_sie_resource();
-
-            /**
-             @brief Special command to only send the class sie class information
-            */
-            int send_sie_class();
-
-            /**
-             @brief Special command to only send the enumeration sie class information
-            */
-            int send_sie_enum();
-
-            /**
-             @brief Special command to only send the top level objects sie class information
-            */
-            int send_sie_top_level_objects();
-
-            /**
-             @brief Special command to send an arbitrary file through the variable server.
-            */
-            int send_file(std::string file_name);
-
-            /**
-             @brief Copy client variable values from Trick memory to each variable's output buffer.
-            */
-            int copy_sim_data();
-
-            /**
-             @brief Copy given variable values from Trick memory to each variable's output buffer.
-             cyclical indicated whether it is a normal cyclical copy or a send_once copy
-            */
-            int copy_sim_data(std::vector<VariableReference *> given_vars, bool cyclical);
-
-            /**
-             @brief Write data in the appropriate format (var_ascii or var_binary) from variable output buffers to socket.
-            */
-            int write_data();
-
-            /**
-             @brief Write data from the given var only to the appropriate format (var_ascii or var_binary) from variable output buffers to socket.
-            */
-            int write_data(std::vector<VariableReference *> var) ;
-
-            /**
-             @brief gets the send_stdio flag.
-            */
-            bool get_send_stdio() ;
-
-            /**
-             @brief sets the send_stdio flag.
-            */
-            int set_send_stdio(bool on_off) ;
-
             VariableServer * get_vs() ;
-            TCDevice & get_connection() ;
-
-            /**
-             @brief Internal function used by input processor to send stdout and stderr to the client.
-             @return always 0
-            */
-            int write_stdio(int stream , std::string text ) ;
-
-            int freeze_init() ;
-
-            int copy_data_freeze() ;
-            int copy_data_freeze_scheduled(long long curr_tics) ;
-            int copy_data_scheduled(long long curr_tics) ;
-            int copy_data_top() ;
 
             void preload_checkpoint() ;
+
             void restart() ;
 
-            long long get_next_tics() ;
-            long long get_freeze_next_tics() ;
-
-            /**
-             @brief creates a udp socket with the specified address and port.  UDP ports do not go through
-             the listen and accept states
-            */
-            int create_udp_socket(const char * address, unsigned short in_port) ;
-
-            /**
-             @brief creates a multicast socket with the specified address and port.  mcast ports do not go through
-             the listen and accept states
-            */
-            int create_mcast_socket(const char * mcast_address, const char * address, unsigned short in_port) ;
-
         protected:
 
             /**
@@ -448,42 +74,15 @@ namespace Trick {
             */
             int transmit_file(std::string file_name);
 
-            /**
-             @brief Called by write_data to write given variables to socket in var_binary format.
-            */
-            int write_binary_data( int Start, char *buf1, const std::vector<VariableReference *>& given_vars, VS_MESSAGE_TYPE message_type);
-
-            /**
-             @brief Called by write_data to write given variables to socket in var_ascii format.
-            */
-            int write_ascii_data(char * dest_buf, size_t dest_buf_size, const std::vector<VariableReference *>& given_vars, VS_MESSAGE_TYPE message_type );
-
-            /**
-             @brief Construct a variable reference from the string in_name and handle error checking
-            */
-            VariableReference* create_var_reference(std::string in_name);
-
-            /**
-             @brief Make a time reference.
-             */
-            REF2* make_time_ref();
-
-            /**
-             @brief Make a "bad-reference" reference.
-             */
-            REF2* make_error_ref(std::string in_name);
-
             /** The Master variable server object. */
             static VariableServer * vs ;
 
+            /** this is where a lot of this should happen now */
+            VariableServerSession * session;
+
             /** The listen device from the variable server\n */
-            TCDevice * listen_dev;          /**<  trick_io(**) */
-
-            /** The trickcomm device used for the connection to the client.\n */
-            TCDevice connection ;            /**<  trick_io(**) */
-
-            /** The type of connection we have.\n */
-            ConnectionType conn_type ;      /**<  trick_io(**) */
+            ClientListener * listener;      /**<  trick_io(**) */
+            TCConnection connection;        /**<  trick_io(**) */
 
             /** Value (1,2,or 3) that causes the variable server to output increasing amounts of debug information.\n */
             int debug ;                      /**<  trick_io(**) */
@@ -491,102 +90,25 @@ namespace Trick {
             /** Toggle to enable/disable this variable server thread.\n */
             bool enabled ;                   /**<  trick_io(**) */
 
-            /** Toggle to turn on/off variable server logged messages to a playback file.\n */
-            bool log ;                       /**< trick_io(**)  */
-
-            /** Toggle to indicate var_pause commanded.\n */
-            bool pause_cmd ;                 /**<  trick_io(**) */
-
-            /** Save pause state while reloading a checkpoint.\n */
-            bool saved_pause_cmd ;           /**<  trick_io(**) */
-
-            /** Toggle to indicate var_exit commanded.\n */
-            bool exit_cmd ;                  /**<  trick_io(**) */
-
-            /** Set to true to validate all addresses before copying.\n */
-            bool validate_address ;          /**<  trick_io(**) */
-
-            /** The mutex to protect variable output buffers when copying variable values to them from Trick memory.\n */
-            pthread_mutex_t copy_mutex ;     /**<  trick_io(**) */
+            ConnectionStatus connection_status ;       /**<  trick_io(**) */
+            pthread_mutex_t connection_status_mutex;
+            pthread_cond_t connection_status_cv;
 
             /** The mutex pauses all processing during checkpoint restart */
             pthread_mutex_t restart_pause ;     /**<  trick_io(**) */
 
-            /** Dummy integer for bad references.\n */
-            static int bad_ref_int ;         /**<  trick_io(**) */
-
-            /** Dummy integer for bad references. If a variable points here, do not try to re-resolve address\n */
-            static int do_not_resolve_bad_ref_int ;  /**<  trick_io(**) */
+            // bool pause_cmd;
+            bool saved_pause_cmd;
 
             /** The simulation time converted to seconds\n */
             double time ;                    /**<  trick_units(s) */
 
-            /** List of client requested variables.\n */
-            std::vector <VariableReference *> vars;  /**<  trick_io(**) */
-
-            /** Toggle to set variable server copy as top_of_frame, scheduled, async \n */
-            VS_COPY_MODE copy_mode ;         /**<  trick_io(**) */
-
-            /** Toggle to set variable server writes as when copied or async.\n */
-            VS_WRITE_MODE write_mode ;       /**<  trick_io(**) */
-
-            /** multiples of frame_count to copy data.  Only used at top_of_frame\n */
-            int frame_multiple ;             /**<  trick_io(**) */
-
-            /** multiples of frame_count to copy data.  Only used at top_of_frame\n */
-            int frame_offset ;               /**<  trick_io(**) */
-
-            /** multiples of frame_count to copy data.  Only used at top_of_frame\n */
-            int freeze_frame_multiple ;      /**<  trick_io(**) */
-
-            /** multiples of frame_count to copy data.  Only used at top_of_frame\n */
-            int freeze_frame_offset ;        /**<  trick_io(**) */
-
-            /** Toggle to tell variable server to byteswap returned values.\n */
-            bool byteswap ;                  /**<  trick_io(**) */
-
-            /** Toggle to tell variable server return data in binary format.\n */
-            bool binary_data ;               /**<  trick_io(**) */
-
-            /** Toggle to tell variable server return data in binary format without the variable names.\n */
-            bool binary_data_nonames ;       /**<  trick_io(**) */
-
             /** Toggle to tell variable server to send data multicast or point to point.\n */
             bool multicast ;                 /**<  trick_io(**) */
-
-            /** Flag to indicate the connection has been made\n */
-            bool connection_accepted ;       /**<  trick_io(**) */
-
-            /** Value set in var_cycle command.\n */
-            double update_rate ;             /**<  trick_io(**) */
-
-            /** The update rate in integer tics.\n */
-            long long cycle_tics ;           /**<  trick_io(**) */
-
-            /** The next call time in integer tics of the job to copy client data (sync mode).\n */
-            long long next_tics ;            /**<  trick_io(**) */
-
-            /** The next call time in integer tics of the job to copy client data (sync mode).\n */
-            long long freeze_next_tics ;     /**<  trick_io(**) */
-
-            /** Indicate whether variable data has been written into buffer_in.\n */
-            bool var_data_staged; /**<  trick_io(**) */
-
-            /** number of packets copied to client \n */
-            unsigned int packets_copied ; /**< trick_io(**) */
-
-            /** Toggle to indicate sending python stdout and stderr to client\n */
-            bool send_stdio ;                /**<  trick_io(**) */
-
-            /** Holding area for the incoming message\n */
-            char *incoming_msg;           /**< trick_io(**) */
-
-            /** Message with '\r' characters removed\n */
-            char *stripped_msg;           /**<  trick_io(**) */
-
-            /** Maximum size of incoming message\n */
-            static const unsigned int MAX_CMD_LEN = 200000 ;
     } ;
+
+    std::ostream& operator<< (std::ostream& s, VariableServerThread& vst);
+
 }
 
 #endif

include/trick/var_binary_parser.hh

@@ -139,4 +139,4 @@ class ParsedBinaryMessage {
         const static size_t variable_name_length_size;
         const static size_t variable_type_size;
         const static size_t variable_size_size;
-};
+};

include/trick/variable_server.h

@@ -1,68 +0,0 @@
-/*
-PURPOSE:
-     (Allows clients to get and set Trick parameters)
-PROGRAMMERS:
-    (((Keith Vetter) (LinCom) (September 2001) (--)))
-*/
-
-#ifndef VARIABLE_SERVER_H
-#define VARIABLE_SERVER_H
-
-#include <pthread.h>
-
-#include "trick/reference.h"
-#include "trick/tc.h"
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-typedef struct {
-    REF2 ref;
-    double scale_factor;
-    double bias;
-} VARIABLE_NODE;
-
-typedef struct {
-    int socket ;              /* ** multicast socket file descriptor */
-    struct sockaddr_in addr ; /* ** multicast socket info */
-} MCAST_INFO;
-
-typedef struct VARIABLE_SERVER_struct {
-    int enabled ;
-    int debug;          /* ** Variable_server debugging */
-    int synchronous ;
-    double update_rate;
-    double next;
-    int binary_data;
-    int no_handshake;
-    int num_vars;
-    int clear_cmd;
-    int send_cmd;
-    int pause_cmd;
-    int exists_cmd;
-    int exit_cmd;
-    VARIABLE_NODE *vars;
-
-    int multicast_on ;   /* -- flag to switch between TCdevice and multcast socket */
-    TCDevice * connection ;
-    MCAST_INFO mcast_info ;
-    char local_byteorder ;
-
-    pthread_t thread_id ;
-} VARIABLE_SERVER;
-
-//void *var_server(void *);       /* Server thread */
-//void *var_serve_init(void *);   /* Initialize server */
-//void exit_var_server(void *);   /* Exit handler for var init server */
-//void exit_var_serv_threads( void );  /* Exit handler for var init server */
-
-int vs_mcast_init(MCAST_INFO * M, char * address , int port ) ;
-//int vs_write_data(VARIABLE_SERVER * V) ;
-//int vs_write_error(VARIABLE_SERVER * V, char * incoming_str , char * error_str ) ;
-//int vs_format_ascii(REF2 * ref, double scale_factor, double bias, char *value) ;
-
-#ifdef __cplusplus
-}
-#endif
-#endif

share/trick/makefiles/Makefile.common

@@ -66,7 +66,7 @@ export TRICK_PYTHON_PATH := $(TRICK_PYTHON_PATH)
 export TRICK_GTE_EXT := $(TRICK_GTE_EXT)
 export TRICK_HOST_CPU := $(shell TRICK_FORCE_32BIT=$(TRICK_FORCE_32BIT) $(TRICK_HOME)/bin/trick-gte TRICK_HOST_CPU)
 export TRICK_EXEC_LINK_LIBS := ${PTHREAD_LIBS} $(PYTHON_LIB) $(UDUNITS_LDFLAGS) $(PLATFORM_LIBS) -lm -ldl
-export TRICK_LIBS := ${RPATH} -L${TRICK_LIB_DIR} -ltrick -ltrick_pyip -ltrick_comm -ltrick_math -ltrick_units -ltrick_mm
+export TRICK_LIBS := ${RPATH} -L${TRICK_LIB_DIR} -ltrick -ltrick_pyip -ltrick_comm -ltrick_math -ltrick_units -ltrick_mm -ltrick_connection_handlers
 export TRICK_SYSTEM_LDFLAGS := $(TRICK_SYSTEM_LDFLAGS)
 export TRICK_SYSTEM_ICG_EXCLUDE := $(TRICK_SYSTEM_ICG_EXCLUDE)
 export TRICK_SWIG_FLAGS := $(TRICK_SWIG_FLAGS)

test/SIM_test_varserv/RUN_test/unit_test.py

@@ -5,7 +5,7 @@ from trick.unit_test import *
 
 def main():
 
-	trick.var_server_set_port(40000)
+	trick.var_server_set_port(4000)
 	trick.var_ascii()
 	trick.real_time_enable()
 	trick.exec_set_software_frame(0.01)

test/SIM_test_varserv/S_overrides.mk

@@ -12,4 +12,4 @@ test_client: models/test_client/test_client.cpp
 
 clean_test_client:
 	rm -f models/test_client/test_client
-	
+	

test/SIM_test_varserv/models/test_client/test_client.cpp

@@ -150,7 +150,6 @@ class Socket {
 
     std::string receive () {
         char buffer[SOCKET_BUF_SIZE];
-
         int numBytes = recv(_socket_fd, buffer, SOCKET_BUF_SIZE, 0);
         if (numBytes < 0) {
         } else if (numBytes < SOCKET_BUF_SIZE) {
@@ -164,6 +163,25 @@ class Socket {
         ret = receive();
     }
 
+    std::vector<unsigned char> receive_bytes() {
+        unsigned char buffer[SOCKET_BUF_SIZE];
+        int numBytes = recv(_socket_fd, buffer, SOCKET_BUF_SIZE, 0);
+        if (numBytes < 0) {
+            std::cout << "Failed to read from socket" << std::endl;
+        } 
+
+        std::vector<unsigned char> bytes;
+        for (int i = 0; i < numBytes; i++) {
+            bytes.push_back(buffer[i]);
+        }
+
+        return bytes;
+    }
+
+    void operator>> (std::string& ret) {
+        ret = receive();
+    }
+
     std::vector<unsigned char> receive_bytes() {
         unsigned char buffer[SOCKET_BUF_SIZE];
         int numBytes = recv(_socket_fd, buffer, SOCKET_BUF_SIZE, 0);
@@ -412,12 +430,23 @@ TEST_F (VariableServerTestMulticast, Strings) {
 
     EXPECT_EQ(strcmp_IgnoringWhiteSpace(reply, expected), 0);
 
+
     expected = std::string("5\tI am already far north of London, and as I walk in the streets of Petersburgh, I feel a cold northern breeze play upon my cheeks, which braces my nerves and fills me with delight. Do you understand this feeling?");
     socket << "trick.var_send_once(\"vsx.vst.p\")\n";
 
     multicast_listener >> reply; 
 
     EXPECT_EQ(strcmp_IgnoringWhiteSpace(reply, expected), 0);
+
+    // TODO: Does wchar actually work?
+    // expected = std::string("5\tThis breeze, which has travelled from the regions towards which I am advancing, gives me a foretaste of those icy climes. Inspirited by this wind of promise, my daydreams become more fervent and vivid.");
+    // socket << "trick.var_send_once(\"vsx.vst.q\")\n";
+
+    // socket >> reply;
+
+    // std::cout << "\tExpected: " << expected << "\n\tActual: " << reply << std::endl;
+
+    // EXPECT_EQ(strcmp_IgnoringWhiteSpace(reply, expected), 0);
 }
 
 
@@ -572,6 +601,7 @@ TEST_F (VariableServerTestAltListener, Strings) {
     socket >> reply;
 
     EXPECT_EQ(strcmp_IgnoringWhiteSpace(reply, expected), 0);
+
 }
 
 TEST_F (VariableServerTestAltListener, AddRemove) {
@@ -649,6 +679,10 @@ TEST_F (VariableServerTestAltListener, RestartAndSet) {
 /*           Normal case tests               */
 /*********************************************/
 
+void spin (Socket& socket, int wait_cycles = 5) {
+        socket.receive();
+}
+
 TEST_F (VariableServerTest, Strings) {
     if (socket_status != 0) {
         FAIL();
@@ -715,7 +749,42 @@ TEST_F (VariableServerTest, NoExtraTab) {
     EXPECT_STREQ(reply.c_str(), expected.c_str());
 }
 
-TEST_F (VariableServerTest, AddRemove) {
+TEST_F (VariableServerTest, NoExtraTab) {
+    if (socket_status != 0) {
+        FAIL();
+    }
+
+    std::string reply;
+    std::string expected;
+
+    socket << "trick.var_add(\"vsx.vst.c\")\n";
+    socket >> reply;
+    expected = std::string("0\t-1234\n");
+
+    EXPECT_STREQ(reply.c_str(), expected.c_str());
+
+    socket >> reply;
+
+    EXPECT_STREQ(reply.c_str(), expected.c_str());
+
+    socket << "trick.var_add(\"vsx.vst.m\")\n";
+    socket >> reply;
+    expected = std::string("0\t-1234\t1\n");
+    
+    EXPECT_STREQ(reply.c_str(), expected.c_str());
+
+    socket << "trick.var_remove(\"vsx.vst.m\")\n";
+    socket >> reply;
+    expected = std::string("0\t-1234\n");
+
+    socket << "trick.var_add(\"vsx.vst.n\")\n";
+    socket >> reply;
+    expected = std::string("0\t-1234\t0,1,2,3,4\n");
+    
+    EXPECT_STREQ(reply.c_str(), expected.c_str());
+}
+
+TEST_F (VariableServerTest, DISABLED_AddRemove) {
     if (socket_status != 0) {
         FAIL();
     }
@@ -742,6 +811,10 @@ TEST_F (VariableServerTest, AddRemove) {
     socket << "trick.var_remove(\"vsx.vst.m\")\n";
     socket >> reply;
     expected = std::string("0  -1234");
+
+    socket << "trick.var_add(\"vsx.vst.n\")\n";
+    socket >> reply;
+    expected = std::string("0  -1234    0,1,2,3,4");
     
     EXPECT_EQ(strcmp_IgnoringWhiteSpace(reply, expected), 0);
 
@@ -1190,7 +1263,18 @@ TEST_F (VariableServerTest, Freeze) {
     ASSERT_EQ(mode, MODE_RUN);
 }
 
+<<<<<<< HEAD
+<<<<<<< HEAD
+=======
+
+<<<<<<< HEAD
+>>>>>>> 6fe76071 (Add multicast test)
+TEST_F (VariableServerTest, DISABLED_CopyAndWriteModes) {
+=======
+=======
+>>>>>>> d158199e (Added var_send_list_size test, various other fixes)
 TEST_F (VariableServerTest, CopyAndWriteModes) {
+>>>>>>> f9665aba (Fix and test var_send_stdio)
     if (socket_status != 0) {
         FAIL();
     }
@@ -1388,6 +1472,38 @@ TEST_F (VariableServerTest, send_stdio) {
 
     std::stringstream message_stream(message);
     std::string token;
+<<<<<<< HEAD
+=======
+    std::getline(message_stream, token, ' ');
+    int message_type = stoi(token);
+    std::getline(message_stream, token, ' ');
+    int stream_num = stoi(token);
+    std::getline(message_stream, token, '\n');
+    int text_size = stoi(token);
+    std::string text;
+    std::getline(message_stream, text);
+
+    EXPECT_EQ (message_type, 4);
+    EXPECT_EQ (stream_num, 1);
+    EXPECT_EQ (text_size, 41);
+
+    EXPECT_EQ(text, std::string("This message should redirect to varserver"));
+}
+
+TEST_F (VariableServerTest, RestartAndSet) {
+    if (socket_status != 0) {
+        FAIL();
+    }
+
+    std::string reply;
+    std::string expected;
+
+    socket << "trick.var_add(\"vsx.vst.c\")\n";
+    socket >> reply;
+    expected = std::string("0\t-1234\n");
+
+    EXPECT_EQ(reply, expected);
+>>>>>>> f9665aba (Fix and test var_send_stdio)
 
     int message_type;
     int stream_num;
@@ -1414,6 +1530,12 @@ TEST_F (VariableServerTest, send_stdio) {
 
 #ifndef __APPLE__
 
+<<<<<<< HEAD
+<<<<<<< HEAD
+TEST_F (VariableServerTest, MulticastAfterRestart) {
+=======
+=======
+
 TEST_F (VariableServerTest, MulticastAfterRestart) {
     if (socket_status != 0) {
         FAIL();
@@ -1422,9 +1544,7 @@ TEST_F (VariableServerTest, MulticastAfterRestart) {
     socket << "trick.var_server_set_user_tag(\"VSTestServer\")\n";
 
     Socket multicast_socket;
-    if (multicast_socket.init_multicast("224.3.14.15", 9265) != 0) {
-        FAIL() << "Multicast Socket failed to initialize.";
-    }
+    multicast_socket.init_multicast("224.3.14.15", 9265);
 
     int max_multicast_tries = 100;
     int tries = 0;
@@ -1432,7 +1552,7 @@ TEST_F (VariableServerTest, MulticastAfterRestart) {
 
     char expected_hostname[80];
     gethostname(expected_hostname, 80);
-    int expected_port = 40000;
+    int expected_port = 4000;
     
     // get expected username
     struct passwd *passp = getpwuid(getuid()) ;
@@ -1488,8 +1608,154 @@ TEST_F (VariableServerTest, MulticastAfterRestart) {
         FAIL() << "Multicast message never received";
 }
 
+>>>>>>> 6490e49d (Add more tests, error handling)
+TEST_F (VariableServerTest, LargeMessages) {
+>>>>>>> f9665aba (Fix and test var_send_stdio)
+    if (socket_status != 0) {
+        FAIL();
+    }
+
+    socket << "trick.var_server_set_user_tag(\"VSTestServer\")\n";
+
+<<<<<<< HEAD
+    Socket multicast_socket;
+    if (multicast_socket.init_multicast("224.3.14.15", 9265) != 0) {
+        FAIL() << "Multicast Socket failed to initialize.";
+    }
+
+    int max_multicast_tries = 100;
+    int tries = 0;
+    bool found = false;
+
+    char expected_hostname[80];
+    gethostname(expected_hostname, 80);
+    int expected_port = 40000;
+    
+    // get expected username
+    struct passwd *passp = getpwuid(getuid()) ;
+    char * expected_username;
+    if ( passp == NULL ) {
+        expected_username = strdup("unknown") ;
+    } else {
+        expected_username = strdup(passp->pw_name) ;
+    }
+    
+    // Don't care about PID, just check that it's > 0
+    char * expected_sim_dir = "trick/test/SIM_test_varserv";    // Compare against the end of the string for this one
+    // Don't care about cmdline name
+    char * expected_input_file = "RUN_test/unit_test.py";
+    // Don't care about trick_version
+    char * expected_tag = "VSTestServer";
+
+    // Variables to be populated by the multicast message
+    char actual_hostname[80];
+    unsigned short actual_port = 0;
+    char actual_username[80];
+    int actual_pid = 0;
+    char actual_sim_dir[80];
+    char actual_cmdline_name[80];
+    char actual_input_file[80];
+    char actual_trick_version[80];
+    char actual_tag[80];
+    unsigned short actual_duplicate_port = 0;
+=======
+    socket << "trick.var_pause()\n";
+
+    for (int i = 0; i < 4000; i++) {
+        std::string var_add = "trick.var_add(\"vsx.vst.large_arr[" + std::to_string(i) + "]\")\n";
+        socket << var_add;
+    }
+
+    // Message size limit is 8192 
+    // Message size should be somewhere between the limit and limit-5 due to size of variable
+    const static int msg_size_limit = 8192;
+
+    auto get_last_number_in_string = [](const std::string& s) -> int {
+        int index = s.size() - 1;
+        while (!isdigit(s.at(index))) { index--; }
+        int num = 0;
+        int exp = 0;
+        while (isdigit(s.at(index))) {
+            num += (s.at(index) - '0') * pow(10, exp);
+            index--;
+            exp++;
+        }
+        return num;
+    };
+
+    auto get_first_number_in_string = [](const std::string& s) -> int {
+        std::stringstream message_stream(s);
+        std::string token;
+        std::getline(message_stream, token, '\t');
+        if (token.size() == 0) { std::getline(message_stream, token, '\t'); }
+        int ret = stoi(token);
+        return ret;
+    };
+
+    socket.clear_buffered_data();
+    
+    bool ready = false;
+    while (!ready) {
+        socket << "trick.var_send_list_size()\n";
+        socket >> reply;
+        if (reply == std::string("3\t4000\n"))
+            ready = true;
+    }
+
+    int new_reply_first = 0;
+    int prev_reply_last = 0;
+    
+    socket << "trick.var_send()\n";
+
+    socket >> reply;
+    new_reply_first = get_first_number_in_string(reply);
+    prev_reply_last = get_last_number_in_string(reply);
+    EXPECT_EQ(new_reply_first, 0);
+    EXPECT_TRUE(reply.size() <= msg_size_limit && reply.size() >= msg_size_limit-5);
+
+    while (prev_reply_last != 3999) {
+        socket >> reply;
+        new_reply_first = get_first_number_in_string(reply);
+
+        EXPECT_TRUE(reply.size() <= msg_size_limit);
+        EXPECT_EQ(prev_reply_last + 1, new_reply_first);
+>>>>>>> d158199e (Added var_send_list_size test, various other fixes)
+
+<<<<<<< HEAD
+    while (!found && tries++ < max_multicast_tries) {
+        std::string broadcast_data = multicast_socket.receive();
+        sscanf(broadcast_data.c_str(), "%s\t%hu\t%s\t%d\t%s\t%s\t%s\t%s\t%s\t%hu\n" , actual_hostname, &actual_port ,
+             actual_username , &actual_pid , actual_sim_dir , actual_cmdline_name ,
+             actual_input_file , actual_trick_version , actual_tag, &actual_duplicate_port) ;
+        
+        if (strcmp(actual_hostname, expected_hostname) == 0 && strcmp(expected_tag, actual_tag) == 0) {
+            found = true;
+            EXPECT_STREQ(actual_hostname, expected_hostname);
+            EXPECT_EQ(actual_port, expected_port);
+            EXPECT_STREQ(actual_username, expected_username);
+            EXPECT_GT(actual_pid, 0);
+            std::string expected_sim_dir_str(expected_sim_dir);
+            std::string actual_sim_dir_str(actual_sim_dir);
+            std::string end_of_actual = actual_sim_dir_str.substr(actual_sim_dir_str.length() - expected_sim_dir_str.length(), actual_sim_dir_str.length());        
+            EXPECT_EQ(expected_sim_dir_str, end_of_actual);
+            EXPECT_STREQ(actual_input_file, expected_input_file);
+            EXPECT_STREQ(actual_tag, expected_tag);
+            EXPECT_EQ(actual_duplicate_port, expected_port);
+        }
+=======
+        prev_reply_last = get_last_number_in_string(reply);
+>>>>>>> 6490e49d (Add more tests, error handling)
+    }
+
+    if (!found)
+        FAIL() << "Multicast message never received";
+}
+
+<<<<<<< HEAD
 #endif
 
+=======
+>>>>>>> f9665aba (Fix and test var_send_stdio)
 TEST_F (VariableServerTest, Binary) {
     if (socket_status != 0) {
         FAIL();
@@ -1652,7 +1918,7 @@ int main(int argc, char **argv) {
     int result = RUN_ALL_TESTS();
 
     Socket socket;
-    socket.init("localhost", 40000);
+    socket.init("localhost", 4000);
     
     if (result == 0) {
         // Success

trick_sims/SIM_billiards/Modified_data/realtime.py

@@ -6,5 +6,10 @@ trick.itimer_enable()
 trick.exec_set_enable_freeze(True)
 # trick.exec_set_freeze_command(True)
 
+# Print stack trace if signal is caught. default True
+trick.exec_set_stack_trace(False)
+# Attach a debugger to the process if a signal is caught. default False
+trick.exec_set_attach_debugger(False)
+
 simControlPanel = trick.SimControlPanel()
 trick.add_external_application(simControlPanel)

trick_sims/SIM_billiards/RUN_break/input.py

@@ -146,17 +146,3 @@ else :
     print('===================================')
     print('PoolTableDisplay needs to be built.')
     print('===================================')
-
-
-# PoolTableDisplay_path = "models/graphics/java/dist/PoolTableDisplay.jar"
-
-# if (os.path.isfile(PoolTableDisplay_path)) :
-#     PoolTableDisplay_cmd = "java -jar " \
-#                    + PoolTableDisplay_path \
-#                    + " " + str(varServerPort) + " &" ;
-#     print(PoolTableDisplay_cmd)
-#     os.system( PoolTableDisplay_cmd);
-# else :
-#     print('=================================================================================================')
-#     print('PoolTableDisplay needs to be built. Please \"cd\" into ../models/graphics/java and type \"make\".')
-#     print('=================================================================================================')

trick_sims/SIM_billiards/models/graphics/cpp/main.cpp

@@ -492,7 +492,7 @@ std::vector<std::string> split (std::string& str, const char delim) {
   std::stringstream ss(str);
   std::string s;
   std::vector<std::string> ret;
-  while (std::getline(ss, s, delim)) {
+  while (ss >> s) {
     ret.push_back(s);
   }
   return ret;
@@ -526,9 +526,11 @@ template <typename T>
 T getVar(Socket& socket, std::string varName) {
   std::string requestString = "trick.var_send_once(\"" + varName + "\")\n";
   std::string reply;
+  // std::cout << "Request: " << requestString << std::endl;
 
   socket << requestString;
   socket >> reply;
+  // std::cout << "Reply: " << reply << std::endl;
 
   return stringConvert<T>(split(reply, '\t')[1]);
 }
@@ -554,10 +556,13 @@ std::vector<T> getVarList(Socket& socket, std::string varName, int num) {
   }
 
   std::string requestString = "trick.var_send_once(\"" + totalRequest + "\", " + std::to_string(num) + ")\n";
+  // std::cout << "Request: " << requestString << std::endl;
 
   std::string reply;
   socket << requestString;
   socket >> reply;
+
+  // std::cout << "Reply: " << reply << std::endl;
   return trickResponseConvert<T>(reply);
 }
 
@@ -604,6 +609,13 @@ int main(int argc, char *argv[])
   std::vector<double> tablePoints = fold(table_x, table_y);
 
   Table table;
+  // std::cout << "TablePoints: ";
+  
+  for (auto point : tablePoints ) {
+    // std::cout << point << " ";
+  }
+  // std::cout << "\ttableShape: " << tableShape << std::endl;
+
   table.addShape(tablePoints, Eigen::Vector3d(0.2, 0.6, 0.2), true, tableShape, layer_TABLE);
 
   // Make the rail - translate each point on the table out from center by railWidth
@@ -697,7 +709,7 @@ int main(int argc, char *argv[])
     std::string cueRequest = "";
     std::string templateString = "dyn.table.applyCueForce(%.3f, %.3f) \n";
 
-    char buf[128];
+    char buf[2048];
     snprintf(buf, sizeof(buf), templateString.c_str(), mouseX, mouseY);
     cueRequest += std::string(buf);
     socket << cueRequest;
@@ -716,7 +728,10 @@ int main(int argc, char *argv[])
 
   view->callback_pre_draw = [&](igl::opengl::glfw::Viewer& viewer) -> bool {
     // Look for new data and redraw
+    // std::cout << "Waiting vars" << std::endl;
     socket >> reply;
+    // std::cout << "Got vars: " << reply << std::endl;
+
     std::vector<double> replyData = trickResponseConvert<double>(reply);
 
     if (replyData.size() <= 1) {
@@ -804,7 +819,7 @@ int main(int argc, char *argv[])
   std::string positionRequest = "";
   char * templateString = "trick.var_add(\"dyn.table.balls[%d][0].pos._x\")\ntrick.var_add(\"dyn.table.balls[%d][0].pos._y\")\ntrick.var_add(\"dyn.table.balls[%d][0].inPlay\")\n";
   for (int i = 0; i < numBalls; i++) {
-    char buf[128];
+    char buf[2048];
     snprintf(buf, sizeof(buf), templateString, i, i, i);
     positionRequest += std::string(buf);
   }

trick_source/java/src/main/java/trick/simcontrol/SimControlApplication.java

@@ -1572,6 +1572,7 @@ public class SimControlApplication extends TrickApplication implements PropertyC
         @Override
         protected void finished() {
             try {
+                System.out.println("Finished with health status socket channel");
                 if (healthStatusSocketChannel != null) {
                     healthStatusSocketChannel.close() ;
                 }
@@ -1606,7 +1607,11 @@ public class SimControlApplication extends TrickApplication implements PropertyC
 
                     if (statusSimcom != null) {
 
-                        results = statusSimcom.get().split("\t");
+                        String resultsStr = statusSimcom.get();
+                        if (resultsStr == null) 
+                            break;
+
+                        results = resultsStr.split("\t");
                         ii = 1 ;
 
                         // whenever there is data in statusSimcom socket, do something

trick_source/java/src/main/java/trick/simcontrol/utils/SimControlActionController.java

@@ -295,7 +295,7 @@ public class SimControlActionController {
                 simcom.put("trick.debug_pause_off()\n" ) ;
             }
         } catch (IOException e) {
-            System.out.println("Put failed!");
+            System.out.println("Put failed! Exception: " + e.getMessage());
         }
     }
 	

trick_source/sim_services/CMakeLists.txt

@@ -215,7 +215,6 @@ set( SS_SRC
   VariableServer/VariableServer_shutdown
   VariableServer/exit_var_thread
   VariableServer/var_server_ext
-  VariableServer/vs_format_ascii
   Zeroconf/Zeroconf
   mains/master
 )

trick_source/sim_services/InputProcessor/Makefile_deps

@@ -135,6 +135,6 @@ object_${TRICK_HOST_CPU}/MTV.o: MTV.cpp ${TRICK_HOME}/include/trick/MTV.hh \
  ${TRICK_HOME}/include/trick/variable_server_sync_types.h \
  ${TRICK_HOME}/include/trick/VariableServerThread.hh \
  ${TRICK_HOME}/include/trick/ThreadBase.hh \
- ${TRICK_HOME}/include/trick/VariableServerReference.hh \
+ ${TRICK_HOME}/include/trick/VariableReference.hh \
  ${TRICK_HOME}/include/trick/VariableServerListenThread.hh \
  ${TRICK_HOME}/include/trick/EventManager_c_intf.hh 

trick_source/sim_services/MonteCarlo/test/Makefile

@@ -9,7 +9,7 @@ include $(dir $(lastword $(MAKEFILE_LIST)))../../../../share/trick/makefiles/Mak
 
 # Flags passed to the preprocessor.
 TRICK_CXXFLAGS += -I$(GTEST_HOME)/include -I$(TRICK_HOME)/include -g -Wall -Wextra ${TRICK_TEST_FLAGS}
-TRICK_LIBS = -L${TRICK_LIB_DIR} -ltrick -ltrick_pyip -ltrick_comm -ltrick_math -ltrick_mm -ltrick_units
+TRICK_LIBS = -L${TRICK_LIB_DIR} -ltrick -ltrick_pyip -ltrick_comm -ltrick_math -ltrick_mm -ltrick_units -ltrick_var_binary_parser -ltrick_connection_handlers -ltrick_comm
 TRICK_EXEC_LINK_LIBS += -L${GTEST_HOME}/lib64 -L${GTEST_HOME}/lib -lgtest -lgtest_main
 
 # All tests produced by this Makefile.  Remember to add new tests you

trick_source/sim_services/VariableServer/Makefile_deps

@@ -12,7 +12,8 @@ object_${TRICK_HOST_CPU}/VariableServerThread_loop.o: VariableServerThread_loop.
  ${TRICK_HOME}/include/trick/variable_server_sync_types.h \
  ${TRICK_HOME}/include/trick/VariableServerThread.hh \
  ${TRICK_HOME}/include/trick/ThreadBase.hh \
- ${TRICK_HOME}/include/trick/VariableServerReference.hh \
+ ${TRICK_HOME}/include/trick/VariableReference.hh \
+ ${TRICK_HOME}/include/trick/VariableServerSession.hh \
  ${TRICK_HOME}/include/trick/VariableServerListenThread.hh \
  ${TRICK_HOME}/include/trick/input_processor_proto.h \
  ${TRICK_HOME}/include/trick/tc_proto.h \
@@ -39,7 +40,8 @@ object_${TRICK_HOST_CPU}/VariableServer_copy_data_scheduled.o: \
  ${TRICK_HOME}/include/trick/variable_server_sync_types.h \
  ${TRICK_HOME}/include/trick/VariableServerThread.hh \
  ${TRICK_HOME}/include/trick/ThreadBase.hh \
- ${TRICK_HOME}/include/trick/VariableServerReference.hh \
+ ${TRICK_HOME}/include/trick/VariableReference.hh \
+ ${TRICK_HOME}/include/trick/VariableServerSession.hh \
  ${TRICK_HOME}/include/trick/VariableServerListenThread.hh \
  ${TRICK_HOME}/include/trick/TrickConstant.hh 
 object_${TRICK_HOST_CPU}/VariableServer_shutdown.o: VariableServer_shutdown.cpp \
@@ -56,7 +58,8 @@ object_${TRICK_HOST_CPU}/VariableServer_shutdown.o: VariableServer_shutdown.cpp
  ${TRICK_HOME}/include/trick/variable_server_sync_types.h \
  ${TRICK_HOME}/include/trick/VariableServerThread.hh \
  ${TRICK_HOME}/include/trick/ThreadBase.hh \
- ${TRICK_HOME}/include/trick/VariableServerReference.hh \
+ ${TRICK_HOME}/include/trick/VariableReference.hh \
+ ${TRICK_HOME}/include/trick/VariableServerSession.hh \
  ${TRICK_HOME}/include/trick/VariableServerListenThread.hh 
 object_${TRICK_HOST_CPU}/VariableServer_copy_data_freeze_scheduled.o: \
  VariableServer_copy_data_freeze_scheduled.cpp \
@@ -73,10 +76,11 @@ object_${TRICK_HOST_CPU}/VariableServer_copy_data_freeze_scheduled.o: \
  ${TRICK_HOME}/include/trick/variable_server_sync_types.h \
  ${TRICK_HOME}/include/trick/VariableServerThread.hh \
  ${TRICK_HOME}/include/trick/ThreadBase.hh \
- ${TRICK_HOME}/include/trick/VariableServerReference.hh \
+ ${TRICK_HOME}/include/trick/VariableReference.hh \
+ ${TRICK_HOME}/include/trick/VariableServerSession.hh \
  ${TRICK_HOME}/include/trick/VariableServerListenThread.hh \
  ${TRICK_HOME}/include/trick/TrickConstant.hh 
-object_${TRICK_HOST_CPU}/VariableReference.o: VariableReference.cpp \
+object_${TRICK_HOST_CPU}/VariableReference.o: \
  ${TRICK_HOME}/include/trick/VariableServer.hh \
  ${TRICK_HOME}/include/trick/tc.h \
  ${TRICK_HOME}/include/trick/trick_error_hndlr.h \
@@ -90,7 +94,8 @@ object_${TRICK_HOST_CPU}/VariableReference.o: VariableReference.cpp \
  ${TRICK_HOME}/include/trick/variable_server_sync_types.h \
  ${TRICK_HOME}/include/trick/VariableServerThread.hh \
  ${TRICK_HOME}/include/trick/ThreadBase.hh \
- ${TRICK_HOME}/include/trick/VariableServerReference.hh \
+ ${TRICK_HOME}/include/trick/VariableReference.hh \
+ ${TRICK_HOME}/include/trick/VariableServerSession.hh \
  ${TRICK_HOME}/include/trick/VariableServerListenThread.hh \
  ${TRICK_HOME}/include/trick/memorymanager_c_intf.h \
  ${TRICK_HOME}/include/trick/var.h \
@@ -113,7 +118,8 @@ object_${TRICK_HOST_CPU}/VariableServer_get_next_freeze_call_time.o: \
  ${TRICK_HOME}/include/trick/variable_server_sync_types.h \
  ${TRICK_HOME}/include/trick/VariableServerThread.hh \
  ${TRICK_HOME}/include/trick/ThreadBase.hh \
- ${TRICK_HOME}/include/trick/VariableServerReference.hh \
+ ${TRICK_HOME}/include/trick/VariableReference.hh \
+ ${TRICK_HOME}/include/trick/VariableServerSession.hh \
  ${TRICK_HOME}/include/trick/VariableServerListenThread.hh \
  ${TRICK_HOME}/include/trick/TrickConstant.hh 
 object_${TRICK_HOST_CPU}/VariableServerThread_write_stdio.o: VariableServerThread_write_stdio.cpp \
@@ -130,7 +136,8 @@ object_${TRICK_HOST_CPU}/VariableServerThread_write_stdio.o: VariableServerThrea
  ${TRICK_HOME}/include/trick/variable_server_sync_types.h \
  ${TRICK_HOME}/include/trick/VariableServerThread.hh \
  ${TRICK_HOME}/include/trick/ThreadBase.hh \
- ${TRICK_HOME}/include/trick/VariableServerReference.hh \
+ ${TRICK_HOME}/include/trick/VariableReference.hh \
+ ${TRICK_HOME}/include/trick/VariableServerSession.hh \
  ${TRICK_HOME}/include/trick/VariableServerListenThread.hh \
  ${TRICK_HOME}/include/trick/variable_server_message_types.h \
  ${TRICK_HOME}/include/trick/tc_proto.h 
@@ -149,7 +156,8 @@ object_${TRICK_HOST_CPU}/VariableServer_get_next_sync_call_time.o: \
  ${TRICK_HOME}/include/trick/variable_server_sync_types.h \
  ${TRICK_HOME}/include/trick/VariableServerThread.hh \
  ${TRICK_HOME}/include/trick/ThreadBase.hh \
- ${TRICK_HOME}/include/trick/VariableServerReference.hh \
+ ${TRICK_HOME}/include/trick/VariableReference.hh \
+ ${TRICK_HOME}/include/trick/VariableServerSession.hh \
  ${TRICK_HOME}/include/trick/VariableServerListenThread.hh \
  ${TRICK_HOME}/include/trick/TrickConstant.hh 
 object_${TRICK_HOST_CPU}/VariableServer_restart.o: VariableServer_restart.cpp \
@@ -166,7 +174,8 @@ object_${TRICK_HOST_CPU}/VariableServer_restart.o: VariableServer_restart.cpp \
  ${TRICK_HOME}/include/trick/variable_server_sync_types.h \
  ${TRICK_HOME}/include/trick/VariableServerThread.hh \
  ${TRICK_HOME}/include/trick/ThreadBase.hh \
- ${TRICK_HOME}/include/trick/VariableServerReference.hh \
+ ${TRICK_HOME}/include/trick/VariableReference.hh \
+ ${TRICK_HOME}/include/trick/VariableServerSession.hh \
  ${TRICK_HOME}/include/trick/VariableServerListenThread.hh \
  ${TRICK_HOME}/include/trick/message_proto.h \
  ${TRICK_HOME}/include/trick/message_type.h \
@@ -185,7 +194,8 @@ object_${TRICK_HOST_CPU}/var_server_ext.o: var_server_ext.cpp \
  ${TRICK_HOME}/include/trick/variable_server_sync_types.h \
  ${TRICK_HOME}/include/trick/VariableServerThread.hh \
  ${TRICK_HOME}/include/trick/ThreadBase.hh \
- ${TRICK_HOME}/include/trick/VariableServerReference.hh \
+ ${TRICK_HOME}/include/trick/VariableReference.hh \
+ ${TRICK_HOME}/include/trick/VariableServerSession.hh \
  ${TRICK_HOME}/include/trick/VariableServerListenThread.hh \
  ${TRICK_HOME}/include/trick/exec_proto.h \
  ${TRICK_HOME}/include/trick/sim_mode.h \
@@ -200,7 +210,8 @@ object_${TRICK_HOST_CPU}/VariableServerThread_create_socket.o: \
  ${TRICK_HOME}/include/trick/tc.h \
  ${TRICK_HOME}/include/trick/trick_error_hndlr.h \
  ${TRICK_HOME}/include/trick/ThreadBase.hh \
- ${TRICK_HOME}/include/trick/VariableServerReference.hh \
+ ${TRICK_HOME}/include/trick/VariableReference.hh \
+ ${TRICK_HOME}/include/trick/VariableServerSession.hh \
  ${TRICK_HOME}/include/trick/reference.h \
  ${TRICK_HOME}/include/trick/attributes.h \
  ${TRICK_HOME}/include/trick/parameter_types.h \
@@ -216,7 +227,8 @@ object_${TRICK_HOST_CPU}/VariableServerListenThread.o: VariableServerListenThrea
  ${TRICK_HOME}/include/trick/trick_error_hndlr.h \
  ${TRICK_HOME}/include/trick/ThreadBase.hh \
  ${TRICK_HOME}/include/trick/VariableServerThread.hh \
- ${TRICK_HOME}/include/trick/VariableServerReference.hh \
+ ${TRICK_HOME}/include/trick/VariableReference.hh \
+ ${TRICK_HOME}/include/trick/VariableServerSession.hh \
  ${TRICK_HOME}/include/trick/reference.h \
  ${TRICK_HOME}/include/trick/attributes.h \
  ${TRICK_HOME}/include/trick/parameter_types.h \
@@ -243,7 +255,8 @@ object_${TRICK_HOST_CPU}/VariableServerThread_write_data.o: VariableServerThread
  ${TRICK_HOME}/include/trick/variable_server_sync_types.h \
  ${TRICK_HOME}/include/trick/VariableServerThread.hh \
  ${TRICK_HOME}/include/trick/ThreadBase.hh \
- ${TRICK_HOME}/include/trick/VariableServerReference.hh \
+ ${TRICK_HOME}/include/trick/VariableReference.hh \
+ ${TRICK_HOME}/include/trick/VariableServerSession.hh \
  ${TRICK_HOME}/include/trick/VariableServerListenThread.hh \
  ${TRICK_HOME}/include/trick/variable_server_message_types.h \
  ${TRICK_HOME}/include/trick/bitfield_proto.h \
@@ -265,7 +278,8 @@ object_${TRICK_HOST_CPU}/VariableServer_init.o: VariableServer_init.cpp \
  ${TRICK_HOME}/include/trick/variable_server_sync_types.h \
  ${TRICK_HOME}/include/trick/VariableServerThread.hh \
  ${TRICK_HOME}/include/trick/ThreadBase.hh \
- ${TRICK_HOME}/include/trick/VariableServerReference.hh \
+ ${TRICK_HOME}/include/trick/VariableReference.hh \
+ ${TRICK_HOME}/include/trick/VariableServerSession.hh \
  ${TRICK_HOME}/include/trick/VariableServerListenThread.hh \
  ${TRICK_HOME}/include/trick/exec_proto.hh \
  ${TRICK_HOME}/include/trick/Executive.hh \
@@ -291,7 +305,8 @@ object_${TRICK_HOST_CPU}/VariableServer_copy_data_freeze.o: VariableServer_copy_
  ${TRICK_HOME}/include/trick/variable_server_sync_types.h \
  ${TRICK_HOME}/include/trick/VariableServerThread.hh \
  ${TRICK_HOME}/include/trick/ThreadBase.hh \
- ${TRICK_HOME}/include/trick/VariableServerReference.hh \
+ ${TRICK_HOME}/include/trick/VariableReference.hh \
+ ${TRICK_HOME}/include/trick/VariableServerSession.hh \
  ${TRICK_HOME}/include/trick/VariableServerListenThread.hh 
 object_${TRICK_HOST_CPU}/VariableServer_default_data.o: VariableServer_default_data.cpp \
  ${TRICK_HOME}/include/trick/VariableServer.hh \
@@ -307,7 +322,8 @@ object_${TRICK_HOST_CPU}/VariableServer_default_data.o: VariableServer_default_d
  ${TRICK_HOME}/include/trick/variable_server_sync_types.h \
  ${TRICK_HOME}/include/trick/VariableServerThread.hh \
  ${TRICK_HOME}/include/trick/ThreadBase.hh \
- ${TRICK_HOME}/include/trick/VariableServerReference.hh \
+ ${TRICK_HOME}/include/trick/VariableReference.hh \
+ ${TRICK_HOME}/include/trick/VariableServerSession.hh \
  ${TRICK_HOME}/include/trick/VariableServerListenThread.hh 
 object_${TRICK_HOST_CPU}/VariableServer_freeze_init.o: VariableServer_freeze_init.cpp \
  ${TRICK_HOME}/include/trick/VariableServer.hh \
@@ -323,7 +339,8 @@ object_${TRICK_HOST_CPU}/VariableServer_freeze_init.o: VariableServer_freeze_ini
  ${TRICK_HOME}/include/trick/variable_server_sync_types.h \
  ${TRICK_HOME}/include/trick/VariableServerThread.hh \
  ${TRICK_HOME}/include/trick/ThreadBase.hh \
- ${TRICK_HOME}/include/trick/VariableServerReference.hh \
+ ${TRICK_HOME}/include/trick/VariableReference.hh \
+ ${TRICK_HOME}/include/trick/VariableServerSession.hh \
  ${TRICK_HOME}/include/trick/VariableServerListenThread.hh \
  ${TRICK_HOME}/include/trick/variable_server_proto.h \
  ${TRICK_HOME}/include/trick/TrickConstant.hh 
@@ -341,34 +358,17 @@ object_${TRICK_HOST_CPU}/VariableServer.o: VariableServer.cpp \
  ${TRICK_HOME}/include/trick/variable_server_sync_types.h \
  ${TRICK_HOME}/include/trick/VariableServerThread.hh \
  ${TRICK_HOME}/include/trick/ThreadBase.hh \
- ${TRICK_HOME}/include/trick/VariableServerReference.hh \
+ ${TRICK_HOME}/include/trick/VariableReference.hh \
+ ${TRICK_HOME}/include/trick/VariableServerSession.hh \
  ${TRICK_HOME}/include/trick/VariableServerListenThread.hh \
  ${TRICK_HOME}/include/trick/tc_proto.h 
-object_${TRICK_HOST_CPU}/vs_format_ascii.o: vs_format_ascii.cpp \
- ${TRICK_HOME}/include/trick/parameter_types.h \
- ${TRICK_HOME}/include/trick/attributes.h \
- ${TRICK_HOME}/include/trick/bitfield_proto.h \
- ${TRICK_HOME}/include/trick/wcs_ext.h \
- ${TRICK_HOME}/include/trick/VariableServer.hh \
- ${TRICK_HOME}/include/trick/tc.h \
- ${TRICK_HOME}/include/trick/trick_error_hndlr.h \
- ${TRICK_HOME}/include/trick/reference.h \
- ${TRICK_HOME}/include/trick/value.h \
- ${TRICK_HOME}/include/trick/dllist.h \
- ${TRICK_HOME}/include/trick/JobData.hh \
- ${TRICK_HOME}/include/trick/InstrumentBase.hh \
- ${TRICK_HOME}/include/trick/variable_server_sync_types.h \
- ${TRICK_HOME}/include/trick/VariableServerThread.hh \
- ${TRICK_HOME}/include/trick/ThreadBase.hh \
- ${TRICK_HOME}/include/trick/VariableServerReference.hh \
- ${TRICK_HOME}/include/trick/VariableServerListenThread.hh \
- ${TRICK_HOME}/include/trick/TrickConstant.hh 
 object_${TRICK_HOST_CPU}/VariableServerThread_restart.o: VariableServerThread_restart.cpp \
  ${TRICK_HOME}/include/trick/VariableServerThread.hh \
  ${TRICK_HOME}/include/trick/tc.h \
  ${TRICK_HOME}/include/trick/trick_error_hndlr.h \
  ${TRICK_HOME}/include/trick/ThreadBase.hh \
- ${TRICK_HOME}/include/trick/VariableServerReference.hh \
+ ${TRICK_HOME}/include/trick/VariableReference.hh \
+ ${TRICK_HOME}/include/trick/VariableServerSession.hh \
  ${TRICK_HOME}/include/trick/reference.h \
  ${TRICK_HOME}/include/trick/attributes.h \
  ${TRICK_HOME}/include/trick/parameter_types.h \
@@ -389,7 +389,8 @@ object_${TRICK_HOST_CPU}/VariableServer_copy_data_top.o: VariableServer_copy_dat
  ${TRICK_HOME}/include/trick/variable_server_sync_types.h \
  ${TRICK_HOME}/include/trick/VariableServerThread.hh \
  ${TRICK_HOME}/include/trick/ThreadBase.hh \
- ${TRICK_HOME}/include/trick/VariableServerReference.hh \
+ ${TRICK_HOME}/include/trick/VariableReference.hh \
+ ${TRICK_HOME}/include/trick/VariableServerSession.hh \
  ${TRICK_HOME}/include/trick/VariableServerListenThread.hh 
 object_${TRICK_HOST_CPU}/exit_var_thread.o: exit_var_thread.cpp \
  ${TRICK_HOME}/include/trick/VariableServer.hh \
@@ -405,7 +406,8 @@ object_${TRICK_HOST_CPU}/exit_var_thread.o: exit_var_thread.cpp \
  ${TRICK_HOME}/include/trick/variable_server_sync_types.h \
  ${TRICK_HOME}/include/trick/VariableServerThread.hh \
  ${TRICK_HOME}/include/trick/ThreadBase.hh \
- ${TRICK_HOME}/include/trick/VariableServerReference.hh \
+ ${TRICK_HOME}/include/trick/VariableReference.hh \
+ ${TRICK_HOME}/include/trick/VariableServerSession.hh \
  ${TRICK_HOME}/include/trick/VariableServerListenThread.hh \
  ${TRICK_HOME}/include/trick/tc_proto.h 
 object_${TRICK_HOST_CPU}/VariableServerThread_copy_data.o: VariableServerThread_copy_data.cpp \
@@ -422,7 +424,8 @@ object_${TRICK_HOST_CPU}/VariableServerThread_copy_data.o: VariableServerThread_
  ${TRICK_HOME}/include/trick/variable_server_sync_types.h \
  ${TRICK_HOME}/include/trick/VariableServerThread.hh \
  ${TRICK_HOME}/include/trick/ThreadBase.hh \
- ${TRICK_HOME}/include/trick/VariableServerReference.hh \
+ ${TRICK_HOME}/include/trick/VariableReference.hh \
+ ${TRICK_HOME}/include/trick/VariableServerSession.hh \
  ${TRICK_HOME}/include/trick/VariableServerListenThread.hh \
  ${TRICK_HOME}/include/trick/exec_proto.h \
  ${TRICK_HOME}/include/trick/sim_mode.h \
@@ -443,7 +446,8 @@ object_${TRICK_HOST_CPU}/VariableServerThread_connect.o: VariableServerThread_co
  ${TRICK_HOME}/include/trick/variable_server_sync_types.h \
  ${TRICK_HOME}/include/trick/VariableServerThread.hh \
  ${TRICK_HOME}/include/trick/ThreadBase.hh \
- ${TRICK_HOME}/include/trick/VariableServerReference.hh \
+ ${TRICK_HOME}/include/trick/VariableReference.hh \
+ ${TRICK_HOME}/include/trick/VariableServerSession.hh \
  ${TRICK_HOME}/include/trick/VariableServerListenThread.hh \
  ${TRICK_HOME}/include/trick/release.h 
 object_${TRICK_HOST_CPU}/VariableServerThread_copy_sim_data.o: \
@@ -461,19 +465,21 @@ object_${TRICK_HOST_CPU}/VariableServerThread_copy_sim_data.o: \
  ${TRICK_HOME}/include/trick/variable_server_sync_types.h \
  ${TRICK_HOME}/include/trick/VariableServerThread.hh \
  ${TRICK_HOME}/include/trick/ThreadBase.hh \
- ${TRICK_HOME}/include/trick/VariableServerReference.hh \
+ ${TRICK_HOME}/include/trick/VariableReference.hh \
+ ${TRICK_HOME}/include/trick/VariableServerSession.hh \
  ${TRICK_HOME}/include/trick/VariableServerListenThread.hh \
  ${TRICK_HOME}/include/trick/memorymanager_c_intf.h \
  ${TRICK_HOME}/include/trick/var.h \
  ${TRICK_HOME}/include/trick/io_alloc.h \
  ${TRICK_HOME}/include/trick/exec_proto.h \
  ${TRICK_HOME}/include/trick/sim_mode.h 
-object_${TRICK_HOST_CPU}/VariableServerThread_freeze_init.o: VariableServerThread_freeze_init.cpp \
- ${TRICK_HOME}/include/trick/VariableServerThread.hh \
+object_${TRICK_HOST_CPU}/VariableServerSession_freeze_init.o: VariableServerSession_freeze_init.cpp \
+ ${TRICK_HOME}/include/trick/VariableServerSession.hh \
  ${TRICK_HOME}/include/trick/tc.h \
  ${TRICK_HOME}/include/trick/trick_error_hndlr.h \
  ${TRICK_HOME}/include/trick/ThreadBase.hh \
- ${TRICK_HOME}/include/trick/VariableServerReference.hh \
+ ${TRICK_HOME}/include/trick/VariableReference.hh \
+ ${TRICK_HOME}/include/trick/VariableServerSession.hh \
  ${TRICK_HOME}/include/trick/reference.h \
  ${TRICK_HOME}/include/trick/attributes.h \
  ${TRICK_HOME}/include/trick/parameter_types.h \
@@ -496,14 +502,16 @@ object_${TRICK_HOST_CPU}/VariableServer_get_var_server_port.o: \
  ${TRICK_HOME}/include/trick/variable_server_sync_types.h \
  ${TRICK_HOME}/include/trick/VariableServerThread.hh \
  ${TRICK_HOME}/include/trick/ThreadBase.hh \
- ${TRICK_HOME}/include/trick/VariableServerReference.hh \
+ ${TRICK_HOME}/include/trick/VariableReference.hh \
+ ${TRICK_HOME}/include/trick/VariableServerSession.hh \
  ${TRICK_HOME}/include/trick/VariableServerListenThread.hh 
 object_${TRICK_HOST_CPU}/VariableServerThread.o: VariableServerThread.cpp \
  ${TRICK_HOME}/include/trick/VariableServerThread.hh \
  ${TRICK_HOME}/include/trick/tc.h \
  ${TRICK_HOME}/include/trick/trick_error_hndlr.h \
  ${TRICK_HOME}/include/trick/ThreadBase.hh \
- ${TRICK_HOME}/include/trick/VariableServerReference.hh \
+ ${TRICK_HOME}/include/trick/VariableReference.hh \
+ ${TRICK_HOME}/include/trick/VariableServerSession.hh \
  ${TRICK_HOME}/include/trick/reference.h \
  ${TRICK_HOME}/include/trick/attributes.h \
  ${TRICK_HOME}/include/trick/parameter_types.h \
@@ -527,7 +535,8 @@ object_${TRICK_HOST_CPU}/VariableServerThread_loop.o: VariableServerThread_loop.
  ${TRICK_HOME}/include/trick/variable_server_sync_types.h \
  ${TRICK_HOME}/include/trick/VariableServerThread.hh \
  ${TRICK_HOME}/include/trick/ThreadBase.hh \
- ${TRICK_HOME}/include/trick/VariableServerReference.hh \
+ ${TRICK_HOME}/include/trick/VariableReference.hh \
+ ${TRICK_HOME}/include/trick/VariableServerSession.hh \
  ${TRICK_HOME}/include/trick/VariableServerListenThread.hh \
  ${TRICK_HOME}/include/trick/input_processor_proto.h \
  ${TRICK_HOME}/include/trick/tc_proto.h \
@@ -554,7 +563,8 @@ object_${TRICK_HOST_CPU}/VariableServer_copy_data_scheduled.o: \
  ${TRICK_HOME}/include/trick/variable_server_sync_types.h \
  ${TRICK_HOME}/include/trick/VariableServerThread.hh \
  ${TRICK_HOME}/include/trick/ThreadBase.hh \
- ${TRICK_HOME}/include/trick/VariableServerReference.hh \
+ ${TRICK_HOME}/include/trick/VariableReference.hh \
+ ${TRICK_HOME}/include/trick/VariableServerSession.hh \
  ${TRICK_HOME}/include/trick/VariableServerListenThread.hh \
  ${TRICK_HOME}/include/trick/TrickConstant.hh 
 object_${TRICK_HOST_CPU}/VariableServer_shutdown.o: VariableServer_shutdown.cpp \
@@ -571,7 +581,8 @@ object_${TRICK_HOST_CPU}/VariableServer_shutdown.o: VariableServer_shutdown.cpp
  ${TRICK_HOME}/include/trick/variable_server_sync_types.h \
  ${TRICK_HOME}/include/trick/VariableServerThread.hh \
  ${TRICK_HOME}/include/trick/ThreadBase.hh \
- ${TRICK_HOME}/include/trick/VariableServerReference.hh \
+ ${TRICK_HOME}/include/trick/VariableReference.hh \
+ ${TRICK_HOME}/include/trick/VariableServerSession.hh \
  ${TRICK_HOME}/include/trick/VariableServerListenThread.hh 
 object_${TRICK_HOST_CPU}/VariableServer_copy_data_freeze_scheduled.o: \
  VariableServer_copy_data_freeze_scheduled.cpp \
@@ -588,10 +599,13 @@ object_${TRICK_HOST_CPU}/VariableServer_copy_data_freeze_scheduled.o: \
  ${TRICK_HOME}/include/trick/variable_server_sync_types.h \
  ${TRICK_HOME}/include/trick/VariableServerThread.hh \
  ${TRICK_HOME}/include/trick/ThreadBase.hh \
- ${TRICK_HOME}/include/trick/VariableServerReference.hh \
+ ${TRICK_HOME}/include/trick/VariableReference.hh \
+ ${TRICK_HOME}/include/trick/VariableServerSession.hh \
  ${TRICK_HOME}/include/trick/VariableServerListenThread.hh \
  ${TRICK_HOME}/include/trick/TrickConstant.hh 
-object_${TRICK_HOST_CPU}/VariableReference.o: VariableReference.cpp \
+object_${TRICK_HOST_CPU}/VariableReference.o: \
+VariableReference.cpp \
+${TRICK_HOME}/include/trick/VariableServerSession.hh \
  ${TRICK_HOME}/include/trick/VariableServer.hh \
  ${TRICK_HOME}/include/trick/tc.h \
  ${TRICK_HOME}/include/trick/trick_error_hndlr.h \
@@ -605,7 +619,8 @@ object_${TRICK_HOST_CPU}/VariableReference.o: VariableReference.cpp \
  ${TRICK_HOME}/include/trick/variable_server_sync_types.h \
  ${TRICK_HOME}/include/trick/VariableServerThread.hh \
  ${TRICK_HOME}/include/trick/ThreadBase.hh \
- ${TRICK_HOME}/include/trick/VariableServerReference.hh \
+ ${TRICK_HOME}/include/trick/VariableReference.hh \
+ ${TRICK_HOME}/include/trick/VariableServerSession.hh \
  ${TRICK_HOME}/include/trick/VariableServerListenThread.hh \
  ${TRICK_HOME}/include/trick/memorymanager_c_intf.h \
  ${TRICK_HOME}/include/trick/var.h \
@@ -627,7 +642,8 @@ object_${TRICK_HOST_CPU}/VariableServerThread_write_stdio.o: VariableServerThrea
  ${TRICK_HOME}/include/trick/variable_server_sync_types.h \
  ${TRICK_HOME}/include/trick/VariableServerThread.hh \
  ${TRICK_HOME}/include/trick/ThreadBase.hh \
- ${TRICK_HOME}/include/trick/VariableServerReference.hh \
+ ${TRICK_HOME}/include/trick/VariableReference.hh \
+ ${TRICK_HOME}/include/trick/VariableServerSession.hh \
  ${TRICK_HOME}/include/trick/VariableServerListenThread.hh \
  ${TRICK_HOME}/include/trick/variable_server_message_types.h \
  ${TRICK_HOME}/include/trick/tc_proto.h 
@@ -645,7 +661,8 @@ object_${TRICK_HOST_CPU}/VariableServerThread_commands.o: VariableServerThread_c
  ${TRICK_HOME}/include/trick/variable_server_sync_types.h \
  ${TRICK_HOME}/include/trick/VariableServerThread.hh \
  ${TRICK_HOME}/include/trick/ThreadBase.hh \
- ${TRICK_HOME}/include/trick/VariableServerReference.hh \
+ ${TRICK_HOME}/include/trick/VariableReference.hh \
+ ${TRICK_HOME}/include/trick/VariableServerSession.hh \
  ${TRICK_HOME}/include/trick/VariableServerListenThread.hh \
  ${TRICK_HOME}/include/trick/variable_server_message_types.h \
  ${TRICK_HOME}/include/trick/memorymanager_c_intf.h \
@@ -676,7 +693,8 @@ object_${TRICK_HOST_CPU}/VariableServer_get_next_sync_call_time.o: \
  ${TRICK_HOME}/include/trick/variable_server_sync_types.h \
  ${TRICK_HOME}/include/trick/VariableServerThread.hh \
  ${TRICK_HOME}/include/trick/ThreadBase.hh \
- ${TRICK_HOME}/include/trick/VariableServerReference.hh \
+ ${TRICK_HOME}/include/trick/VariableReference.hh \
+ ${TRICK_HOME}/include/trick/VariableServerSession.hh \
  ${TRICK_HOME}/include/trick/VariableServerListenThread.hh \
  ${TRICK_HOME}/include/trick/TrickConstant.hh 
 object_${TRICK_HOST_CPU}/VariableServer_restart.o: VariableServer_restart.cpp \
@@ -693,7 +711,8 @@ object_${TRICK_HOST_CPU}/VariableServer_restart.o: VariableServer_restart.cpp \
  ${TRICK_HOME}/include/trick/variable_server_sync_types.h \
  ${TRICK_HOME}/include/trick/VariableServerThread.hh \
  ${TRICK_HOME}/include/trick/ThreadBase.hh \
- ${TRICK_HOME}/include/trick/VariableServerReference.hh \
+ ${TRICK_HOME}/include/trick/VariableReference.hh \
+ ${TRICK_HOME}/include/trick/VariableServerSession.hh \
  ${TRICK_HOME}/include/trick/VariableServerListenThread.hh \
  ${TRICK_HOME}/include/trick/message_proto.h \
  ${TRICK_HOME}/include/trick/message_type.h \
@@ -712,7 +731,8 @@ object_${TRICK_HOST_CPU}/var_server_ext.o: var_server_ext.cpp \
  ${TRICK_HOME}/include/trick/variable_server_sync_types.h \
  ${TRICK_HOME}/include/trick/VariableServerThread.hh \
  ${TRICK_HOME}/include/trick/ThreadBase.hh \
- ${TRICK_HOME}/include/trick/VariableServerReference.hh \
+ ${TRICK_HOME}/include/trick/VariableReference.hh \
+ ${TRICK_HOME}/include/trick/VariableServerSession.hh \
  ${TRICK_HOME}/include/trick/VariableServerListenThread.hh \
  ${TRICK_HOME}/include/trick/exec_proto.h \
  ${TRICK_HOME}/include/trick/sim_mode.h \
@@ -727,7 +747,8 @@ object_${TRICK_HOST_CPU}/VariableServerThread_create_socket.o: \
  ${TRICK_HOME}/include/trick/tc.h \
  ${TRICK_HOME}/include/trick/trick_error_hndlr.h \
  ${TRICK_HOME}/include/trick/ThreadBase.hh \
- ${TRICK_HOME}/include/trick/VariableServerReference.hh \
+ ${TRICK_HOME}/include/trick/VariableReference.hh \
+ ${TRICK_HOME}/include/trick/VariableServerSession.hh \
  ${TRICK_HOME}/include/trick/reference.h \
  ${TRICK_HOME}/include/trick/attributes.h \
  ${TRICK_HOME}/include/trick/parameter_types.h \
@@ -741,9 +762,12 @@ object_${TRICK_HOST_CPU}/VariableServerListenThread.o: VariableServerListenThrea
  ${TRICK_HOME}/include/trick/VariableServerListenThread.hh \
  ${TRICK_HOME}/include/trick/tc.h \
  ${TRICK_HOME}/include/trick/trick_error_hndlr.h \
+ ${TRICK_HOME}/include/trick/ClientListener.hh \
+ ${TRICK_HOME}/include/trick/MulticastManager.hh \
  ${TRICK_HOME}/include/trick/ThreadBase.hh \
  ${TRICK_HOME}/include/trick/VariableServerThread.hh \
- ${TRICK_HOME}/include/trick/VariableServerReference.hh \
+ ${TRICK_HOME}/include/trick/VariableReference.hh \
+ ${TRICK_HOME}/include/trick/VariableServerSession.hh \
  ${TRICK_HOME}/include/trick/reference.h \
  ${TRICK_HOME}/include/trick/attributes.h \
  ${TRICK_HOME}/include/trick/parameter_types.h \
@@ -770,7 +794,8 @@ object_${TRICK_HOST_CPU}/VariableServerThread_write_data.o: VariableServerThread
  ${TRICK_HOME}/include/trick/variable_server_sync_types.h \
  ${TRICK_HOME}/include/trick/VariableServerThread.hh \
  ${TRICK_HOME}/include/trick/ThreadBase.hh \
- ${TRICK_HOME}/include/trick/VariableServerReference.hh \
+ ${TRICK_HOME}/include/trick/VariableReference.hh \
+ ${TRICK_HOME}/include/trick/VariableServerSession.hh \
  ${TRICK_HOME}/include/trick/VariableServerListenThread.hh \
  ${TRICK_HOME}/include/trick/variable_server_message_types.h \
  ${TRICK_HOME}/include/trick/bitfield_proto.h \
@@ -792,7 +817,8 @@ object_${TRICK_HOST_CPU}/VariableServer_init.o: VariableServer_init.cpp \
  ${TRICK_HOME}/include/trick/variable_server_sync_types.h \
  ${TRICK_HOME}/include/trick/VariableServerThread.hh \
  ${TRICK_HOME}/include/trick/ThreadBase.hh \
- ${TRICK_HOME}/include/trick/VariableServerReference.hh \
+ ${TRICK_HOME}/include/trick/VariableReference.hh \
+ ${TRICK_HOME}/include/trick/VariableServerSession.hh \
  ${TRICK_HOME}/include/trick/VariableServerListenThread.hh \
  ${TRICK_HOME}/include/trick/exec_proto.hh \
  ${TRICK_HOME}/include/trick/Executive.hh \
@@ -818,7 +844,8 @@ object_${TRICK_HOST_CPU}/VariableServer_copy_data_freeze.o: VariableServer_copy_
  ${TRICK_HOME}/include/trick/variable_server_sync_types.h \
  ${TRICK_HOME}/include/trick/VariableServerThread.hh \
  ${TRICK_HOME}/include/trick/ThreadBase.hh \
- ${TRICK_HOME}/include/trick/VariableServerReference.hh \
+ ${TRICK_HOME}/include/trick/VariableReference.hh \
+ ${TRICK_HOME}/include/trick/VariableServerSession.hh \
  ${TRICK_HOME}/include/trick/VariableServerListenThread.hh 
 object_${TRICK_HOST_CPU}/VariableServer_default_data.o: VariableServer_default_data.cpp \
  ${TRICK_HOME}/include/trick/VariableServer.hh \
@@ -834,7 +861,8 @@ object_${TRICK_HOST_CPU}/VariableServer_default_data.o: VariableServer_default_d
  ${TRICK_HOME}/include/trick/variable_server_sync_types.h \
  ${TRICK_HOME}/include/trick/VariableServerThread.hh \
  ${TRICK_HOME}/include/trick/ThreadBase.hh \
- ${TRICK_HOME}/include/trick/VariableServerReference.hh \
+ ${TRICK_HOME}/include/trick/VariableReference.hh \
+ ${TRICK_HOME}/include/trick/VariableServerSession.hh \
  ${TRICK_HOME}/include/trick/VariableServerListenThread.hh 
 object_${TRICK_HOST_CPU}/VariableServer_freeze_init.o: VariableServer_freeze_init.cpp \
  ${TRICK_HOME}/include/trick/VariableServer.hh \
@@ -850,7 +878,8 @@ object_${TRICK_HOST_CPU}/VariableServer_freeze_init.o: VariableServer_freeze_ini
  ${TRICK_HOME}/include/trick/variable_server_sync_types.h \
  ${TRICK_HOME}/include/trick/VariableServerThread.hh \
  ${TRICK_HOME}/include/trick/ThreadBase.hh \
- ${TRICK_HOME}/include/trick/VariableServerReference.hh \
+ ${TRICK_HOME}/include/trick/VariableReference.hh \
+ ${TRICK_HOME}/include/trick/VariableServerSession.hh \
  ${TRICK_HOME}/include/trick/VariableServerListenThread.hh \
  ${TRICK_HOME}/include/trick/variable_server_proto.h \
  ${TRICK_HOME}/include/trick/TrickConstant.hh 
@@ -868,34 +897,17 @@ object_${TRICK_HOST_CPU}/VariableServer.o: VariableServer.cpp \
  ${TRICK_HOME}/include/trick/variable_server_sync_types.h \
  ${TRICK_HOME}/include/trick/VariableServerThread.hh \
  ${TRICK_HOME}/include/trick/ThreadBase.hh \
- ${TRICK_HOME}/include/trick/VariableServerReference.hh \
+ ${TRICK_HOME}/include/trick/VariableReference.hh \
+ ${TRICK_HOME}/include/trick/VariableServerSession.hh \
  ${TRICK_HOME}/include/trick/VariableServerListenThread.hh \
  ${TRICK_HOME}/include/trick/tc_proto.h 
-object_${TRICK_HOST_CPU}/vs_format_ascii.o: vs_format_ascii.cpp \
- ${TRICK_HOME}/include/trick/parameter_types.h \
- ${TRICK_HOME}/include/trick/attributes.h \
- ${TRICK_HOME}/include/trick/bitfield_proto.h \
- ${TRICK_HOME}/include/trick/wcs_ext.h \
- ${TRICK_HOME}/include/trick/VariableServer.hh \
- ${TRICK_HOME}/include/trick/tc.h \
- ${TRICK_HOME}/include/trick/trick_error_hndlr.h \
- ${TRICK_HOME}/include/trick/reference.h \
- ${TRICK_HOME}/include/trick/value.h \
- ${TRICK_HOME}/include/trick/dllist.h \
- ${TRICK_HOME}/include/trick/JobData.hh \
- ${TRICK_HOME}/include/trick/InstrumentBase.hh \
- ${TRICK_HOME}/include/trick/variable_server_sync_types.h \
- ${TRICK_HOME}/include/trick/VariableServerThread.hh \
- ${TRICK_HOME}/include/trick/ThreadBase.hh \
- ${TRICK_HOME}/include/trick/VariableServerReference.hh \
- ${TRICK_HOME}/include/trick/VariableServerListenThread.hh \
- ${TRICK_HOME}/include/trick/TrickConstant.hh 
 object_${TRICK_HOST_CPU}/VariableServerThread_restart.o: VariableServerThread_restart.cpp \
  ${TRICK_HOME}/include/trick/VariableServerThread.hh \
  ${TRICK_HOME}/include/trick/tc.h \
  ${TRICK_HOME}/include/trick/trick_error_hndlr.h \
  ${TRICK_HOME}/include/trick/ThreadBase.hh \
- ${TRICK_HOME}/include/trick/VariableServerReference.hh \
+ ${TRICK_HOME}/include/trick/VariableReference.hh \
+ ${TRICK_HOME}/include/trick/VariableServerSession.hh \
  ${TRICK_HOME}/include/trick/reference.h \
  ${TRICK_HOME}/include/trick/attributes.h \
  ${TRICK_HOME}/include/trick/parameter_types.h \
@@ -916,7 +928,8 @@ object_${TRICK_HOST_CPU}/VariableServer_copy_data_top.o: VariableServer_copy_dat
  ${TRICK_HOME}/include/trick/variable_server_sync_types.h \
  ${TRICK_HOME}/include/trick/VariableServerThread.hh \
  ${TRICK_HOME}/include/trick/ThreadBase.hh \
- ${TRICK_HOME}/include/trick/VariableServerReference.hh \
+ ${TRICK_HOME}/include/trick/VariableReference.hh \
+ ${TRICK_HOME}/include/trick/VariableServerSession.hh \
  ${TRICK_HOME}/include/trick/VariableServerListenThread.hh 
 object_${TRICK_HOST_CPU}/exit_var_thread.o: exit_var_thread.cpp \
  ${TRICK_HOME}/include/trick/VariableServer.hh \
@@ -932,7 +945,8 @@ object_${TRICK_HOST_CPU}/exit_var_thread.o: exit_var_thread.cpp \
  ${TRICK_HOME}/include/trick/variable_server_sync_types.h \
  ${TRICK_HOME}/include/trick/VariableServerThread.hh \
  ${TRICK_HOME}/include/trick/ThreadBase.hh \
- ${TRICK_HOME}/include/trick/VariableServerReference.hh \
+ ${TRICK_HOME}/include/trick/VariableReference.hh \
+ ${TRICK_HOME}/include/trick/VariableServerSession.hh \
  ${TRICK_HOME}/include/trick/VariableServerListenThread.hh \
  ${TRICK_HOME}/include/trick/tc_proto.h 
 object_${TRICK_HOST_CPU}/VariableServerThread_copy_data.o: VariableServerThread_copy_data.cpp \
@@ -949,7 +963,8 @@ object_${TRICK_HOST_CPU}/VariableServerThread_copy_data.o: VariableServerThread_
  ${TRICK_HOME}/include/trick/variable_server_sync_types.h \
  ${TRICK_HOME}/include/trick/VariableServerThread.hh \
  ${TRICK_HOME}/include/trick/ThreadBase.hh \
- ${TRICK_HOME}/include/trick/VariableServerReference.hh \
+ ${TRICK_HOME}/include/trick/VariableReference.hh \
+ ${TRICK_HOME}/include/trick/VariableServerSession.hh \
  ${TRICK_HOME}/include/trick/VariableServerListenThread.hh \
  ${TRICK_HOME}/include/trick/exec_proto.h \
  ${TRICK_HOME}/include/trick/sim_mode.h \
@@ -971,7 +986,8 @@ object_${TRICK_HOST_CPU}/VariableServer_get_next_freeze_call_time.o: \
  ${TRICK_HOME}/include/trick/variable_server_sync_types.h \
  ${TRICK_HOME}/include/trick/VariableServerThread.hh \
  ${TRICK_HOME}/include/trick/ThreadBase.hh \
- ${TRICK_HOME}/include/trick/VariableServerReference.hh \
+ ${TRICK_HOME}/include/trick/VariableReference.hh \
+ ${TRICK_HOME}/include/trick/VariableServerSession.hh \
  ${TRICK_HOME}/include/trick/VariableServerListenThread.hh \
  ${TRICK_HOME}/include/trick/TrickConstant.hh 
 object_${TRICK_HOST_CPU}/VariableServerThread_connect.o: VariableServerThread_connect.cpp \
@@ -988,7 +1004,8 @@ object_${TRICK_HOST_CPU}/VariableServerThread_connect.o: VariableServerThread_co
  ${TRICK_HOME}/include/trick/variable_server_sync_types.h \
  ${TRICK_HOME}/include/trick/VariableServerThread.hh \
  ${TRICK_HOME}/include/trick/ThreadBase.hh \
- ${TRICK_HOME}/include/trick/VariableServerReference.hh \
+ ${TRICK_HOME}/include/trick/VariableReference.hh \
+ ${TRICK_HOME}/include/trick/VariableServerSession.hh \
  ${TRICK_HOME}/include/trick/VariableServerListenThread.hh \
  ${TRICK_HOME}/include/trick/release.h 
 object_${TRICK_HOST_CPU}/VariableServerThread_copy_sim_data.o: \
@@ -1006,7 +1023,8 @@ object_${TRICK_HOST_CPU}/VariableServerThread_copy_sim_data.o: \
  ${TRICK_HOME}/include/trick/variable_server_sync_types.h \
  ${TRICK_HOME}/include/trick/VariableServerThread.hh \
  ${TRICK_HOME}/include/trick/ThreadBase.hh \
- ${TRICK_HOME}/include/trick/VariableServerReference.hh \
+ ${TRICK_HOME}/include/trick/VariableReference.hh \
+ ${TRICK_HOME}/include/trick/VariableServerSession.hh \
  ${TRICK_HOME}/include/trick/VariableServerListenThread.hh \
  ${TRICK_HOME}/include/trick/memorymanager_c_intf.h \
  ${TRICK_HOME}/include/trick/var.h \
@@ -1018,7 +1036,8 @@ object_${TRICK_HOST_CPU}/VariableServerThread_freeze_init.o: VariableServerThrea
  ${TRICK_HOME}/include/trick/tc.h \
  ${TRICK_HOME}/include/trick/trick_error_hndlr.h \
  ${TRICK_HOME}/include/trick/ThreadBase.hh \
- ${TRICK_HOME}/include/trick/VariableServerReference.hh \
+ ${TRICK_HOME}/include/trick/VariableReference.hh \
+ ${TRICK_HOME}/include/trick/VariableServerSession.hh \
  ${TRICK_HOME}/include/trick/reference.h \
  ${TRICK_HOME}/include/trick/attributes.h \
  ${TRICK_HOME}/include/trick/parameter_types.h \
@@ -1041,14 +1060,16 @@ object_${TRICK_HOST_CPU}/VariableServer_get_var_server_port.o: \
  ${TRICK_HOME}/include/trick/variable_server_sync_types.h \
  ${TRICK_HOME}/include/trick/VariableServerThread.hh \
  ${TRICK_HOME}/include/trick/ThreadBase.hh \
- ${TRICK_HOME}/include/trick/VariableServerReference.hh \
+ ${TRICK_HOME}/include/trick/VariableReference.hh \
+ ${TRICK_HOME}/include/trick/VariableServerSession.hh \
  ${TRICK_HOME}/include/trick/VariableServerListenThread.hh 
 object_${TRICK_HOST_CPU}/VariableServerThread.o: VariableServerThread.cpp \
  ${TRICK_HOME}/include/trick/VariableServerThread.hh \
  ${TRICK_HOME}/include/trick/tc.h \
  ${TRICK_HOME}/include/trick/trick_error_hndlr.h \
  ${TRICK_HOME}/include/trick/ThreadBase.hh \
- ${TRICK_HOME}/include/trick/VariableServerReference.hh \
+ ${TRICK_HOME}/include/trick/VariableReference.hh \
+ ${TRICK_HOME}/include/trick/VariableServerSession.hh \
  ${TRICK_HOME}/include/trick/reference.h \
  ${TRICK_HOME}/include/trick/attributes.h \
  ${TRICK_HOME}/include/trick/parameter_types.h \
@@ -1058,3 +1079,51 @@ object_${TRICK_HOST_CPU}/VariableServerThread.o: VariableServerThread.cpp \
  ${TRICK_HOME}/include/trick/exec_proto.h \
  ${TRICK_HOME}/include/trick/sim_mode.h \
  ${TRICK_HOME}/include/trick/TrickConstant.hh 
+object_${TRICK_HOST_CPU}/VariableServerSession.o: VariableServerSession.cpp \
+ ${TRICK_HOME}/include/trick/VariableServerThread.hh \
+ ${TRICK_HOME}/include/trick/tc.h \
+ ${TRICK_HOME}/include/trick/trick_error_hndlr.h \
+ ${TRICK_HOME}/include/trick/ThreadBase.hh \
+ ${TRICK_HOME}/include/trick/VariableReference.hh \
+ ${TRICK_HOME}/include/trick/VariableServerSession.hh \
+ ${TRICK_HOME}/include/trick/reference.h \
+ ${TRICK_HOME}/include/trick/attributes.h \
+ ${TRICK_HOME}/include/trick/parameter_types.h \
+ ${TRICK_HOME}/include/trick/value.h \
+ ${TRICK_HOME}/include/trick/dllist.h \
+ ${TRICK_HOME}/include/trick/variable_server_sync_types.h \
+ ${TRICK_HOME}/include/trick/exec_proto.h \
+ ${TRICK_HOME}/include/trick/sim_mode.h \
+ ${TRICK_HOME}/include/trick/TrickConstant.hh 
+ object_${TRICK_HOST_CPU}/TCConnection.o: TCConnection.cpp \
+ ${TRICK_HOME}/include/trick/TCConnection.hh \
+ ${TRICK_HOME}/include/trick/ClientConnection.hh \
+ ${TRICK_HOME}/include/trick/ClientListener.hh \
+ ${TRICK_HOME}/include/trick/VariableServerThread.hh \
+ ${TRICK_HOME}/include/trick/tc.h \
+ ${TRICK_HOME}/include/trick/trick_error_hndlr.h \
+ ${TRICK_HOME}/include/trick/ThreadBase.hh \
+ ${TRICK_HOME}/include/trick/VariableReference.hh \
+ ${TRICK_HOME}/include/trick/VariableServerSession.hh \
+ ${TRICK_HOME}/include/trick/reference.h \
+ ${TRICK_HOME}/include/trick/attributes.h \
+ ${TRICK_HOME}/include/trick/parameter_types.h \
+ ${TRICK_HOME}/include/trick/value.h \
+ ${TRICK_HOME}/include/trick/dllist.h \
+ ${TRICK_HOME}/include/trick/variable_server_sync_types.h \
+ ${TRICK_HOME}/include/trick/exec_proto.h \
+ ${TRICK_HOME}/include/trick/sim_mode.h \
+ ${TRICK_HOME}/include/trick/TrickConstant.hh  \
+ ${TRICK_HOME}/include/trick/tc_proto.h
+object_${TRICK_HOST_CPU}/ClientListener.o: ClientListener.cpp \
+ ${TRICK_HOME}/include/trick/TCConnection.hh \
+ ${TRICK_HOME}/include/trick/ClientConnection.hh \
+ ${TRICK_HOME}/include/trick/ClientListener.hh \
+ ${TRICK_HOME}/include/trick/tc.h \
+ ${TRICK_HOME}/include/trick/trick_error_hndlr.h \
+ ${TRICK_HOME}/include/trick/tc_proto.h
+ object_${TRICK_HOST_CPU}/MulticastManager.o: MulticastManager.cpp \
+ ${TRICK_HOME}/include/trick/MulticastManager.hh \
+ ${TRICK_HOME}/include/trick/tc.h \
+ ${TRICK_HOME}/include/trick/trick_error_hndlr.h \
+ ${TRICK_HOME}/include/trick/tc_proto.h

trick_source/sim_services/VariableServer/VariableReference.cpp

@@ -1,80 +1,736 @@
-
 #include <stdlib.h>
 #include <iostream>
 #include <udunits2.h>
-#include "trick/VariableServer.hh"
+#include <math.h> // for fpclassify
+#include <iomanip> // for setprecision
+#include <string.h>
+#include <sstream>
+
+#include "trick/VariableReference.hh"
 #include "trick/memorymanager_c_intf.h"
 #include "trick/wcs_ext.h"
+#include "trick/map_trick_units_to_udunits.hh"
 #include "trick/message_proto.h"
 #include "trick/message_type.h"
-
-Trick::VariableReference::VariableReference(REF2 * in_ref ) {
+#include "trick/UdUnits.hh"
+#include "trick/bitfield_proto.h"
+#include "trick/trick_byteswap.h"
+#include "trick/tc_proto.h"
 
 
-    int k ;
+// Static variables to be addresses that are known to be the error ref address
+int Trick::VariableReference::bad_ref_int = 0 ;
+int Trick::VariableReference::do_not_resolve_bad_ref_int = 0 ;
 
-    // VariableReference copy setup: set address & size to copy into buffer
-    conversion_factor = cv_get_trivial() ;
+REF2* Trick::VariableReference::make_error_ref(std::string in_name) {
+    REF2* new_ref;
+    new_ref = (REF2*)calloc(1, sizeof(REF2));
+    new_ref->reference = strdup(in_name.c_str()) ;
+    new_ref->units = NULL ;
+    new_ref->address = (char *)&bad_ref_int ;
+    new_ref->attr = (ATTRIBUTES*)calloc(1, sizeof(ATTRIBUTES)) ;
+    new_ref->attr->type = TRICK_NUMBER_OF_TYPES ;
+    new_ref->attr->units = (char *)"--" ;
+    new_ref->attr->size = sizeof(int) ;
+    return new_ref;
+}
 
-    ref = in_ref ;
-    address = ref->address ;
-    size = ref->attr->size ;
-    // char* and wchar* in Trick 7 have a type of string and wstring, respectively
-    // but in Trick 10 they are type char and wchar (probably John Penn's fault),
-    // so we need to keep track that they are really string and wstring
-    string_type = ref->attr->type ;
-    need_deref = false ;
+REF2* Trick::VariableReference::make_do_not_resolve_ref(std::string in_name) {
+    REF2* new_ref;
+    new_ref = (REF2*)calloc(1, sizeof(REF2));
+    new_ref->reference = strdup(in_name.c_str()) ;
+    new_ref->units = NULL ;
+    new_ref->address = (char *)&do_not_resolve_bad_ref_int ;
+    new_ref->attr = (ATTRIBUTES*)calloc(1, sizeof(ATTRIBUTES)) ;
+    new_ref->attr->type = TRICK_NUMBER_OF_TYPES ;
+    new_ref->attr->units = (char *)"--" ;
+    new_ref->attr->size = sizeof(int) ;
+    return new_ref;
+}
 
-    if ( ref->num_index == ref->attr->num_index ) {
-        // single value
-    } else if ( ref->attr->index[ref->attr->num_index - 1].size != 0 ) {
-        // fixed array
-        for ( k = ref->attr->num_index-1;  k > ref->num_index-1 ; k-- ) {
-            size *= ref->attr->index[k].size ;
+// Helper function to deal with time variable
+REF2* make_time_ref(double * time) {
+    REF2* new_ref;
+    new_ref = (REF2*)calloc(1, sizeof(REF2));
+    new_ref->reference = strdup("time") ;
+    new_ref->units = strdup("s") ;
+    new_ref->address = (char *)time ;
+    new_ref->attr = (ATTRIBUTES*)calloc(1, sizeof(ATTRIBUTES)) ;
+    new_ref->attr->type = TRICK_DOUBLE ;
+    new_ref->attr->units = strdup("s") ;
+    new_ref->attr->size = sizeof(double) ;
+    return new_ref;
+}
+
+Trick::VariableReference::VariableReference(std::string var_name, double* time) : staged(false), write_ready(false) {
+    if (var_name != "time") {
+        ASSERT(0);
+    }
+
+    var_info = make_time_ref(time);
+
+    // Set up member variables
+    address = var_info->address;
+    size = var_info->attr->size ;
+    deref = false;
+
+    // Deal with weirdness around string vs wstring
+    trick_type = var_info->attr->type ;
+
+    // Allocate stage and write buffers
+    stage_buffer = calloc(size, 1) ;
+    write_buffer = calloc(size, 1) ;
+
+    conversion_factor = cv_get_trivial();
+}
+
+Trick::VariableReference::VariableReference(std::string var_name) : staged(false), write_ready(false) {
+
+    if (var_name == "time") {
+        ASSERT(0);
+    } else {
+        // get variable attributes from memory manager
+        var_info = ref_attributes(var_name.c_str());
+    }
+
+    // Handle error cases
+    if ( var_info == NULL ) {
+        // TODO: ERROR LOGGER sendErrorMessage("Variable Server could not find variable %s.\n", var_name);
+        // PRINTF IS NOT AN ERROR LOGGER @me
+        printf("Variable Server could not find variable %s.\n", var_name.c_str());
+        var_info = make_error_ref(var_name);
+    } else if ( var_info->attr ) {
+        if ( var_info->attr->type == TRICK_STRUCTURED ) {
+            // sendErrorMessage("Variable Server: var_add cant add \"%s\" because its a composite variable.\n", var_name);
+            printf("Variable Server: var_add cant add \"%s\" because its a composite variable.\n", var_name.c_str());
+
+            free(var_info);
+            var_info = make_do_not_resolve_ref(var_name);
+
+        } else if ( var_info->attr->type == TRICK_STL ) {
+            // sendErrorMessage("Variable Server: var_add cant add \"%s\" because its an STL variable.\n", var_name);
+            printf("Variable Server: var_add cant add \"%s\" because its an STL variable.\n", var_name.c_str());
+
+            free(var_info);
+            var_info = make_do_not_resolve_ref(var_name);
         }
     } else {
-        // arrays with pointers
-        if ((ref->attr->num_index - ref->num_index) > 1 ) {
-            // you cannot request more than one dimension because they are not contiguous
-            message_publish(MSG_ERROR, "Variable Server Error: var_add(%s) requests more than one dimension of dynamic array.\n", ref->reference);
-            message_publish(MSG_ERROR, "Data is not contiguous so returned values are unpredictable.\n") ;
+        // sendErrorMessage("Variable Server: BAD MOJO - Missing ATTRIBUTES.");
+        printf("Variable Server: BAD MOJO - Missing ATTRIBUTES.");
+
+        free(var_info);
+        var_info = make_error_ref(var_name);
+    }
+
+    // Set up member variables
+    var_info->units = NULL;
+    address = var_info->address;
+    size = var_info->attr->size ;
+    deref = false;
+
+    // Deal with weirdness around string vs wstring
+    trick_type = var_info->attr->type ;
+
+    if ( var_info->num_index == var_info->attr->num_index ) {
+        // single value - nothing else necessary
+    } else if ( var_info->attr->index[var_info->attr->num_index - 1].size != 0 ) {
+        // Constrained array
+        for ( int i = var_info->attr->num_index-1;  i > var_info->num_index-1 ; i-- ) {
+            size *= var_info->attr->index[i].size ;
         }
-        if ( ref->attr->type == TRICK_CHARACTER ) {
-        // treat char* like a c++ string (see below)
-            string_type = TRICK_STRING ;
-            need_deref = true;
-        } else if ( ref->attr->type == TRICK_WCHAR ) {
-        // treat wchar_t* like a wstring (see below)
-            string_type = TRICK_WSTRING ;
+    } else {
+        // Unconstrained array
+        if ((var_info->attr->num_index - var_info->num_index) > 1 ) {
+            // TODO: ERROR LOGGER
+            printf("Variable Server Error: var_add(%s) requests more than one dimension of dynamic array.\n", var_info->reference);
+            printf("Data is not contiguous so returned values are unpredictable.\n") ;
+        }
+        if ( var_info->attr->type == TRICK_CHARACTER ) {
+            trick_type = TRICK_STRING ;
+            deref = true;
+        } else if ( var_info->attr->type == TRICK_WCHAR ) {
+            trick_type = TRICK_WSTRING ;
+            deref = true;
         } else {
-            need_deref = true ;
+            deref = true ;
             size *= get_size((char*)address) ;
         }
     }
-
     // handle strings: set a max buffer size, the copy size may vary so will be set in copy_sim_data
-    if (( string_type == TRICK_STRING ) || ( string_type == TRICK_WSTRING )) {
+    if (( trick_type == TRICK_STRING ) || ( trick_type == TRICK_WSTRING )) {
         size = MAX_ARRAY_LENGTH ;
     }
 
-    buffer_in  = calloc( size, 1 ) ;
-    buffer_out = calloc( size, 1 ) ;
+    // Allocate stage and write buffers
+    stage_buffer = calloc(size, 1) ;
+    write_buffer = calloc(size, 1) ;
 
+    conversion_factor = cv_get_trivial();
 
-}
-
-std::ostream& Trick::operator<< (std::ostream& s, const Trick::VariableReference& vref) {
-
-    if (vref.ref->reference != NULL) {
-        s << "      \"" << vref.ref->reference << "\"";
-    } else {
-        s<< "      null";
-    }
-    return s;
+    // Done!
 }
 
 Trick::VariableReference::~VariableReference() {
-    free(ref) ;
-    free(buffer_in) ;
-    free(buffer_out) ;
+    if (var_info != NULL) {
+        free( var_info );
+        var_info = NULL;
+    }
+    if (stage_buffer != NULL) {
+        free (stage_buffer);
+        stage_buffer = NULL;
+    }
+    if (write_buffer != NULL) {
+        free (write_buffer);
+        write_buffer = NULL;
+    }
+    if (conversion_factor != NULL) {
+        cv_free(conversion_factor);
+    }
 }
+
+const char* Trick::VariableReference::getName() const {
+    return var_info->reference;
+}
+
+int Trick::VariableReference::getSizeBinary() const {
+    return size;
+}
+
+TRICK_TYPE Trick::VariableReference::getType() const {
+    return trick_type;
+}
+
+const char* Trick::VariableReference::getBaseUnits() const {
+    return var_info->attr->units;
+}
+
+int Trick::VariableReference::setRequestedUnits(std::string units_name) {
+    // Some error logging lambdas - these should probably go somewhere else
+    // But I do kinda like them
+    auto publish = [](MESSAGE_TYPE type, const std::string& message) {
+        std::ostringstream oss;
+        oss << "Variable Server: " << message << std::endl;
+        message_publish(type, oss.str().c_str());
+    };
+
+    auto publishError = [&](const std::string& units) {
+        std::ostringstream oss;
+        oss << "units error for [" << getName() << "] [" << units << "]";
+        publish(MSG_ERROR, oss.str());
+    };
+
+    // If the units_name parameter is "xx", set it to the current units.
+    if (!units_name.compare("xx")) {
+        units_name = getBaseUnits();
+    }
+
+    // if unitless ('--') then do not convert to udunits 
+    if(units_name.compare("--")) {
+        // Check to see if this is an old style Trick unit that needs to be converted to new udunits
+        std::string new_units = map_trick_units_to_udunits(units_name) ;
+        // Warn if a conversion has taken place
+        if ( units_name.compare(new_units) ) {
+            // TODO: MAKE BETTER SYSTEM FOR ERROR LOGGING
+            std::ostringstream oss;
+            oss << "[" << getName() << "] old-style units converted from ["
+                << units_name << "] to [" << new_units << "]";
+            publish(MSG_WARNING, oss.str());
+        }
+
+        // Interpret base unit
+        ut_unit * from = ut_parse(Trick::UdUnits::get_u_system(), getBaseUnits(), UT_ASCII) ;
+        if ( !from ) {
+            std::cout << "Error in interpreting base units" << std::endl;
+            publishError(getBaseUnits());
+            ut_free(from) ;
+            return -1 ;
+        }
+
+        // Interpret requested unit
+        ut_unit * to = ut_parse(Trick::UdUnits::get_u_system(), new_units.c_str(), UT_ASCII) ;
+        if ( !to ) {
+            std::cout << "Error in interpreting requested units" << std::endl;
+            publishError(new_units);
+            ut_free(from) ;
+            ut_free(to) ;
+            return -1 ;
+        }
+
+        // Create a converter from the base to the requested
+        auto new_conversion_factor = ut_get_converter(from, to) ;
+        ut_free(from) ;
+        ut_free(to) ;
+        if ( !new_conversion_factor ) {
+            std::ostringstream oss;
+            oss << "[" << getName() << "] cannot convert units from [" << getBaseUnits()
+                << "] to [" << new_units << "]";
+            publish(MSG_ERROR, oss.str());
+            return -1 ;
+        } else {
+            conversion_factor = new_conversion_factor;
+        }
+
+        // Don't memory leak the old units!
+        if (var_info->units != NULL)  {
+            free(var_info->units);
+        }
+    
+        // Set the requested units. This will cause the unit string to be printed in write_value_ascii
+        var_info->units = strdup(new_units.c_str());;
+    }
+    return 0;
+}
+
+int Trick::VariableReference::stageValue(bool validate_address) {
+    write_ready = false;
+
+    // Copy <size> bytes from <address> to staging_point.
+
+    // Try to recreate connection if it has been broken
+    if (var_info->address == &bad_ref_int) {
+        REF2 *new_ref = ref_attributes(var_info->reference);
+        if (new_ref != NULL) {
+            var_info = new_ref;
+            address = var_info->address;
+        }
+    }
+
+    // if there's a pointer somewhere in the address path, follow it in case pointer changed
+    if ( var_info->pointer_present == 1 ) {
+        address = follow_address_path(var_info) ;
+        if (address == NULL) {
+            tagAsInvalid();
+        } else if ( validate_address ) {
+            validate();
+        } else {
+            var_info->address = address ;
+        }
+    }
+
+    // if this variable is a string we need to get the raw character string out of it.
+    if (( trick_type == TRICK_STRING ) && !deref) {
+        std::string * str_ptr = (std::string *)var_info->address ;
+        // Get a pointer to the internal character array
+        address = (void *)(str_ptr->c_str()) ;
+    }
+
+    // if this variable itself is a pointer, dereference it
+    if ( deref ) {
+        address = *(void**)var_info->address ;
+    }
+
+    // handle c++ string and char*
+    if ( trick_type == TRICK_STRING ) {
+        if (address == NULL) {
+            size = 0 ;
+        } else {
+            size = strlen((char*)address) + 1 ;
+        }
+    }
+    // handle c++ wstring and wchar_t*
+    if ( trick_type == TRICK_WSTRING ) {
+        if (address == NULL) {
+            size = 0 ;
+        } else {
+            size = wcslen((wchar_t *)address) * sizeof(wchar_t);
+        }
+    }
+    if(address != NULL) {
+        memcpy( stage_buffer , address , size ) ;
+    }
+
+    staged = true;
+    return 0;
+}
+
+bool Trick::VariableReference::validate() {
+    // The address is not NULL.
+    // Should be called by VariableServer Session if validateAddress is on.
+    // check the memory manager if the address falls into
+    // any of the memory blocks it knows of.  Don't do this if we have a std::string or
+    // wstring type, or we already are pointing to a bad ref.
+    if ( (trick_type != TRICK_STRING) and
+            (trick_type != TRICK_WSTRING) and
+            (var_info->address != &bad_ref_int) and
+            (get_alloc_info_of(address) == NULL) ) {
+        
+        // This variable is broken, make it into an error ref
+        tagAsInvalid();
+        return false;
+    }
+
+    // Everything is fine
+    return true;
+}
+
+static void write_escaped_string( std::ostream& os, const char* s) {
+    for (int ii=0 ; ii<strlen(s) ; ii++) {
+        if (isprint(s[ii])) {
+            os << s[ii];
+        } else {
+            switch ((s)[ii]) {
+                case '\n': os << "\\n"; break;
+                case '\t': os << "\\t"; break;
+                case '\b': os << "\\b"; break;
+                case '\a': os << "\\a"; break;
+                case '\f': os << "\\f"; break;
+                case '\r': os << "\\n"; break;
+                case '\v': os << "\\v"; break;
+                case '\"': os << "\\\""; break;
+                default  : {
+                    // Replicating behavior from original vs_format_ascii
+                    char temp_s[6];
+                    sprintf(temp_s, "\\x%02x", s[ii]);
+                    os << temp_s ; 
+                    break;
+                }
+            }
+        }
+    }
+}
+
+int Trick::VariableReference::getSizeAscii() const {
+    std::stringstream ss;
+    writeValueAscii(ss);
+    return ss.str().length();
+}
+
+
+int Trick::VariableReference::writeValueAscii( std::ostream& out ) const {
+    // This is copied and modified from vs_format_ascii
+    // There's a lot here that doesn't make sense to me that I need to come back to
+    // There seems to be a huge buffer overflow issue in the original.
+    // Only strings are checked for length, arrays aren't
+    // But using a stream instead should make that better
+    // The way that arrays are handled seems weird.
+
+    if (!isWriteReady()) {
+        return -1;
+    }
+
+    int bytes_written = 0;
+    void * buf_ptr = write_buffer ;
+    while (bytes_written < size) {
+        bytes_written += var_info->attr->size ;
+
+        switch (trick_type) {
+
+        case TRICK_CHARACTER:
+            if (var_info->attr->num_index == var_info->num_index) {
+                // Single char
+                out << (int)cv_convert_double(conversion_factor, *(char *)buf_ptr);
+            } else {
+                // All but last dim specified, leaves a char array 
+                write_escaped_string(out, (const char *) buf_ptr);
+                bytes_written = size ;
+            }
+            break;
+        case TRICK_UNSIGNED_CHARACTER:
+            if (var_info->attr->num_index == var_info->num_index) {
+                // Single char
+                out << (unsigned int)cv_convert_double(conversion_factor,*(unsigned char *)buf_ptr);
+            } else {
+                // All but last dim specified, leaves a char array 
+                write_escaped_string(out, (const char *) buf_ptr);
+                bytes_written = size ;
+            }
+            break;
+
+        case TRICK_WCHAR:{
+                if (var_info->attr->num_index == var_info->num_index) {
+                    out << *(wchar_t *) buf_ptr;
+                } else {
+                    // convert wide char string char string
+                    size_t len = wcs_to_ncs_len((wchar_t *)buf_ptr) + 1 ;
+
+                    char temp_buf[len];
+                    wcs_to_ncs((wchar_t *) buf_ptr, temp_buf, len);
+                    out << temp_buf;
+                    bytes_written = size ;
+                }
+            }
+            break;
+
+        case TRICK_STRING:
+            if ((char *) buf_ptr != NULL) {
+                write_escaped_string(out, (const char *) buf_ptr);
+                bytes_written = size ;
+            } else {
+                out << '\0';
+            }
+            break;
+
+        case TRICK_WSTRING:
+            if ((wchar_t *) buf_ptr != NULL) {
+                // convert wide char string char string
+                size_t len = wcs_to_ncs_len( (wchar_t *)buf_ptr) + 1 ;
+
+                char temp_buf[len];
+                wcs_to_ncs(  (wchar_t *) buf_ptr, temp_buf, len);
+                out << temp_buf;
+                bytes_written = size ;
+            } else {
+                out << '\0';
+            }
+            break;
+        case TRICK_SHORT:
+            out << (short)cv_convert_double(conversion_factor,*(short *)buf_ptr);
+            break;
+
+        case TRICK_UNSIGNED_SHORT:
+            out << (unsigned short)cv_convert_double(conversion_factor,*(unsigned short *)buf_ptr);
+            break;
+
+        case TRICK_INTEGER:
+        case TRICK_ENUMERATED:
+            out << (int)cv_convert_double(conversion_factor,*(int *)buf_ptr);
+            break;
+
+        case TRICK_BOOLEAN:
+            out << (int)cv_convert_double(conversion_factor,*(bool *)buf_ptr);
+            break;
+
+        case TRICK_BITFIELD:
+            out << (GET_BITFIELD(buf_ptr, var_info->attr->size, var_info->attr->index[0].start, var_info->attr->index[0].size));
+            break;
+
+        case TRICK_UNSIGNED_BITFIELD:
+            out << (GET_UNSIGNED_BITFIELD(buf_ptr, var_info->attr->size, var_info->attr->index[0].start, var_info->attr->index[0].size));
+            break;
+            
+        case TRICK_UNSIGNED_INTEGER:
+            out << (unsigned int)cv_convert_double(conversion_factor,*(unsigned int *)buf_ptr);
+            break;
+
+        case TRICK_LONG: {
+            long l = *(long *)buf_ptr;
+            if (conversion_factor != cv_get_trivial()) {
+                l = (long)cv_convert_double(conversion_factor, l);
+            }
+            out << l;
+            break;
+        }
+
+        case TRICK_UNSIGNED_LONG: {
+            unsigned long ul = *(unsigned long *)buf_ptr;
+            if (conversion_factor != cv_get_trivial()) {
+                ul = (unsigned long)cv_convert_double(conversion_factor, ul);
+            }
+            out << ul;
+            break;
+        }
+
+        case TRICK_FLOAT:
+            out << std::setprecision(8) << cv_convert_float(conversion_factor,*(float *)buf_ptr);
+            break;
+
+        case TRICK_DOUBLE:
+            out << std::setprecision(16) << cv_convert_double(conversion_factor,*(double *)buf_ptr);
+            break;
+
+        case TRICK_LONG_LONG: {
+            long long ll = *(long long *)buf_ptr;
+            if (conversion_factor != cv_get_trivial()) {
+                ll = (long long)cv_convert_double(conversion_factor, ll);
+            }
+            out << ll;
+            break;
+        }
+
+        case TRICK_UNSIGNED_LONG_LONG: {
+            unsigned long long ull = *(unsigned long long *)buf_ptr;
+            if (conversion_factor != cv_get_trivial()) {
+                ull = (unsigned long long)cv_convert_double(conversion_factor, ull);
+            }
+            out << ull;
+            break;
+        }
+
+        case TRICK_NUMBER_OF_TYPES:
+            out << "BAD_REF";
+            break;
+
+        default:{
+
+            break;
+        }
+        } // end switch
+
+        if (bytes_written < size) {
+        // if returning an array, continue array as comma separated values
+            out << ",";
+            buf_ptr = (void*) ((long)buf_ptr + var_info->attr->size) ;
+        }
+    } //end while
+
+    if (var_info->units) {
+        if ( var_info->attr->mods & TRICK_MODS_UNITSDASHDASH ) {
+            out << " {--}";
+        } else {
+            out << " {" << var_info->units << "}";
+        }
+    }
+
+    return 0;
+}
+
+void Trick::VariableReference::tagAsInvalid () {
+    std::string save_name(getName()) ;
+    free(var_info) ;
+    var_info = make_error_ref(save_name) ;
+    address = var_info->address ;
+}
+
+
+int Trick::VariableReference::prepareForWrite() {
+    if (!staged) {
+        return 1;
+    }
+
+    void * temp_p = stage_buffer;
+    stage_buffer = write_buffer;
+    write_buffer = temp_p;
+
+    staged = false;
+    write_ready = true;
+    return 0;
+}
+
+bool Trick::VariableReference::isStaged() const {
+    return staged;
+}
+
+bool Trick::VariableReference::isWriteReady() const {
+    return write_ready;
+}
+
+int Trick::VariableReference::writeTypeBinary( std::ostream& out, bool byteswap ) const {
+    int local_type = trick_type;
+    if (byteswap) {
+        local_type = trick_byteswap_int(local_type);
+    }
+    out.write(const_cast<const char *>(reinterpret_cast<char *>(&local_type)), sizeof(int));
+
+    return 0;
+}
+
+int Trick::VariableReference::writeSizeBinary( std::ostream& out, bool byteswap ) const {
+    int local_size = size;
+    if (byteswap) {
+        local_size = trick_byteswap_int(local_size);
+    }
+    out.write(const_cast<const char *>(reinterpret_cast<char *>(&local_size)), sizeof(int));
+
+    return 0;
+}
+
+int Trick::VariableReference::writeNameBinary( std::ostream& out, bool byteswap ) const {
+    const char * name = getName();
+
+    int name_size = strlen(name);
+    if (byteswap) {
+        name_size = trick_byteswap_int(name_size);
+    }
+
+    out.write(const_cast<const char *>(reinterpret_cast<char *>(&name_size)), sizeof(int));
+    out.write(name, strlen(name));
+
+    return 0;
+}
+
+void Trick::VariableReference::byteswap_var (char * out, char * in) const {
+    byteswap_var(out, in, *this);
+}
+
+
+void Trick::VariableReference::byteswap_var (char * out, char * in, const VariableReference& ref) {
+    ATTRIBUTES * attr = ref.var_info->attr;
+    int array_size = 1;
+
+    // Determine how many elements are in this array if it is an array
+    for (int j = 0; j < ref.var_info->attr->num_index; j++) {
+        array_size *= attr->index[j].size;
+    }
+
+    switch (attr->size) {
+        case 1:
+            // If these are just characters, no need to byteswap
+            for (int j = 0; j < array_size; j++) {
+                out[j] = in[j];
+            }
+            break;
+
+        case 2: {
+            short * short_in = reinterpret_cast<short *> (in);
+            short * short_out = reinterpret_cast<short *> (out);
+
+            for (int j = 0; j < array_size; j++) {
+                short_out[j] = trick_byteswap_short(short_in[j]);
+            }
+            break;
+        }
+
+        case 4: {
+            int * int_in = reinterpret_cast<int *> (in);
+            int * int_out = reinterpret_cast<int *> (out);
+
+            for (int j = 0; j < array_size; j++) {
+                int_out[j] = trick_byteswap_int(int_in[j]);
+            }
+            break;
+        }
+        case 8: {
+            // We don't actually care if this is double or long, just that it's the right size
+            double * double_in = reinterpret_cast<double *> (in);
+            double * double_out = reinterpret_cast<double *> (out);
+
+            for (int j = 0; j < array_size; j++) {
+                double_out[j] = trick_byteswap_double(double_in[j]);
+            }
+            break;
+        }
+    }
+}
+
+
+
+int Trick::VariableReference::writeValueBinary( std::ostream& out, bool byteswap ) const {
+
+    char buf[20480];
+    int temp_i ;
+    unsigned int temp_ui ;
+
+    // int offset = 0;
+
+    switch ( var_info->attr->type ) {
+        case TRICK_BITFIELD:
+            temp_i = GET_BITFIELD(address , var_info->attr->size ,
+                var_info->attr->index[0].start, var_info->attr->index[0].size) ;
+            memcpy(buf, &temp_i , (size_t)size) ;
+        break ;
+        case TRICK_UNSIGNED_BITFIELD:
+            temp_ui = GET_UNSIGNED_BITFIELD(address , var_info->attr->size ,
+                    var_info->attr->index[0].start, var_info->attr->index[0].size) ;
+            memcpy(buf , &temp_ui , (size_t)size) ;
+        break ;
+        case TRICK_NUMBER_OF_TYPES:
+            // TRICK_NUMBER_OF_TYPES is an error case
+            temp_i = 0 ;
+            memcpy(buf , &temp_i , (size_t)size) ;
+        break ;
+        default:
+            if (byteswap)
+                byteswap_var(buf, (char *) address);
+            else
+                memcpy(buf , address , (size_t)size) ;
+        break ;
+    }
+
+    out.write(buf, size);
+}  
+
+std::ostream& Trick::operator<< (std::ostream& s, const Trick::VariableReference& ref) {
+
+    s << "      \"" << ref.getName() << "\"";
+    return s;
+}

trick_source/sim_services/VariableServer/VariableServer.cpp

@@ -16,6 +16,7 @@ Trick::VariableServer::VariableServer() :
 }
 
 Trick::VariableServer::~VariableServer() {
+
 }
 
 std::ostream& Trick::operator<< (std::ostream& s, Trick::VariableServer& vs) {
@@ -65,8 +66,8 @@ bool Trick::VariableServer::get_log() {
 void Trick::VariableServer::set_var_server_log_on() {
     log = true;
     // turn log on for all current vs clients
-    std::map < pthread_t , VariableServerThread * >::iterator it ;
-    for ( it = var_server_threads.begin() ; it != var_server_threads.end() ; it++ ) {
+    std::map < pthread_t , VariableServerSession * >::iterator it ;
+    for ( it = var_server_sessions.begin() ; it != var_server_sessions.end() ; it++ ) {
         (*it).second->set_log_on();
     }
 }
@@ -74,14 +75,15 @@ void Trick::VariableServer::set_var_server_log_on() {
 void Trick::VariableServer::set_var_server_log_off() {
     log = false;
     // turn log off for all current vs clients
-    std::map < pthread_t , VariableServerThread * >::iterator it ;
-    for ( it = var_server_threads.begin() ; it != var_server_threads.end() ; it++ ) {
+    std::map < pthread_t , VariableServerSession * >::iterator it ;
+    for ( it = var_server_sessions.begin() ; it != var_server_sessions.end() ; it++ ) {
         (*it).second->set_log_off();
     }
 }
 
 const char * Trick::VariableServer::get_hostname() {
-    return (listen_thread.get_hostname()) ;
+    const char * ret = (listen_thread.get_hostname()) ;
+    return ret;
 }
 
 Trick::VariableServerListenThread & Trick::VariableServer::get_listen_thread() {
@@ -94,6 +96,12 @@ void Trick::VariableServer::add_vst(pthread_t in_thread_id, VariableServerThread
     pthread_mutex_unlock(&map_mutex) ;
 }
 
+void Trick::VariableServer::add_session(pthread_t in_thread_id, VariableServerSession * in_session) {
+    pthread_mutex_lock(&map_mutex) ;
+    var_server_sessions[in_thread_id] = in_session ;
+    pthread_mutex_unlock(&map_mutex) ;
+}
+
 Trick::VariableServerThread * Trick::VariableServer::get_vst(pthread_t thread_id) {
     std::map < pthread_t , Trick::VariableServerThread * >::iterator it ;
     Trick::VariableServerThread * ret = NULL ;
@@ -106,12 +114,30 @@ Trick::VariableServerThread * Trick::VariableServer::get_vst(pthread_t thread_id
     return ret ;
 }
 
+Trick::VariableServerSession * Trick::VariableServer::get_session(pthread_t thread_id) {
+    std::map < pthread_t , Trick::VariableServerSession * >::iterator it ;
+    Trick::VariableServerSession * ret = NULL ;
+    pthread_mutex_lock(&map_mutex) ;
+    it = var_server_sessions.find(thread_id) ;
+    if ( it != var_server_sessions.end() ) {
+        ret = (*it).second ;
+    }
+    pthread_mutex_unlock(&map_mutex) ;
+    return ret ;
+}
+
 void Trick::VariableServer::delete_vst(pthread_t thread_id) {
     pthread_mutex_lock(&map_mutex) ;
     var_server_threads.erase(thread_id) ;
     pthread_mutex_unlock(&map_mutex) ;
 }
 
+void Trick::VariableServer::delete_session(pthread_t thread_id) {
+    pthread_mutex_lock(&map_mutex) ;
+    var_server_sessions.erase(thread_id) ;
+    pthread_mutex_unlock(&map_mutex) ;
+}
+
 void Trick::VariableServer::set_copy_data_job( Trick::JobData * in_job ) {
     copy_data_job = in_job ;
 }

trick_source/sim_services/VariableServer/VariableServerListenThread.cpp

@@ -10,37 +10,38 @@
 #include "trick/message_proto.h"
 #include "trick/message_type.h"
 
+
 Trick::VariableServerListenThread::VariableServerListenThread() :
  Trick::SysThread("VarServListen"),
- port(0),
- user_port_requested(false),
+ requested_port(0),
+ requested_source_address(""),
+ user_requested_address(false),
  broadcast(true),
- listen_dev()
+ listener()
 {
-    char hname[80];
-    gethostname(hname , (size_t) 80 ) ;
-    source_address = std::string(hname) ;
-    strcpy(listen_dev.client_tag, "<empty>");
-    tc_error(&listen_dev, 0);
     pthread_mutex_init(&restart_pause, NULL);
 }
 
 Trick::VariableServerListenThread::~VariableServerListenThread() {
-        free(listen_dev.hostname) ;
-        free(listen_dev.error_handler) ;
+    // if (multicast != NULL) {
+    //     delete multicast;
+    //     multicast = NULL;
+    // }
 }
 
+
 const char * Trick::VariableServerListenThread::get_hostname() {
-    return listen_dev.hostname;
+    const char * ret = listener.getHostname();
+    return ret;
 }
 
 unsigned short Trick::VariableServerListenThread::get_port() {
-    return port;
+    return requested_port;
 }
 
 void Trick::VariableServerListenThread::set_port(unsigned short in_port) {
-    port = in_port;
-    user_port_requested = true ;
+    requested_port = in_port;
+    user_requested_address = true ;
 }
 
 std::string Trick::VariableServerListenThread::get_user_tag() {
@@ -57,140 +58,116 @@ void Trick::VariableServerListenThread::set_user_tag(std::string in_tag) {
 
 void Trick::VariableServerListenThread::set_source_address(const char * address) {
     if ( address == NULL ) {
-        source_address = std::string("") ;
+        requested_source_address = std::string("") ;
     } else {
-        source_address = std::string(address) ;
+        requested_source_address = std::string(address) ;
     }
-    user_port_requested = true ;
+    user_requested_address = true ;
 }
 
 std::string Trick::VariableServerListenThread::get_source_address() {
-    return source_address ;
+    return listener.getHostname() ;
 }
 
 bool Trick::VariableServerListenThread::get_broadcast() {
     return broadcast;
 }
 
+// in_broadcast atomic? We'll see what tsan says. Maybe go nuts with atomics
 void Trick::VariableServerListenThread::set_broadcast(bool in_broadcast) {
     broadcast = in_broadcast;
 }
 
 int Trick::VariableServerListenThread::init_listen_device() {
-    int ret;
-
-    ret = tc_init(&listen_dev);
-    if (ret == TC_SUCCESS) {
-        port = listen_dev.port ;
-    } else {
-        fprintf(stderr, "ERROR: Could not establish listen port for Variable Server. Aborting.\n");
-        ret = -1 ;
-    }
-    return ret ;
+    int ret = listener.initialize();
+    requested_port = listener.getPort();
+    requested_source_address = std::string(listener.getHostname());
+    return ret;
 }
 
 int Trick::VariableServerListenThread::check_and_move_listen_device() {
     int ret ;
 
-    if ( source_address.compare(listen_dev.hostname) or port != listen_dev.port ) {
+    if ( user_requested_address ) {
+
         /* The user has requested a different source address or port in the input file */
-        tc_disconnect(&listen_dev) ;
-        ret = tc_init_with_connection_info(&listen_dev, AF_INET, SOCK_STREAM, source_address.c_str(), port) ;
+        listener.disconnect();
+        ret = listener.initialize(requested_source_address, requested_port);
+        requested_port = listener.getPort();
+        requested_source_address = std::string(listener.getHostname());
         if (ret != TC_SUCCESS) {
+            std::cout << "Unsuccessful initialization " << std::endl;
             message_publish(MSG_ERROR, "ERROR: Could not establish variable server source_address %s: port %d. Aborting.\n",
-             source_address.c_str(), port);
+             requested_source_address.c_str(), requested_port);
             return -1 ;
         }
     }
+
     return 0 ;
 }
 
 void Trick::VariableServerListenThread::create_tcp_socket(const char * address, unsigned short in_port ) {
-    int result = tc_init_with_connection_info(&listen_dev, AF_INET, SOCK_STREAM, address, in_port) ;
-    if (result != 0) {
-        message_publish(MSG_ERROR, "ERROR: Could not establish additional listen port at address %s and port %d for Variable Server.\n", address, in_port);
-    }
+    listener.initialize(address, in_port);
 }
 
 void * Trick::VariableServerListenThread::thread_body() {
+    // This thread listens for incoming client connections, and when one is received, creates a new thread to handle the session
+    // Also broadcasts on multicast channel
 
-    fd_set rfds;
-    struct timeval timeout_time = { 2, 0 };
-    char buf1[1024] = { 0 } ;
-    struct passwd * passp ;
-    Trick::VariableServerThread * vst ;
-    int value;
-    std::string version;
-    char * user_name ;
-
-    int mcast_socket = 0;
-    struct sockaddr_in mcast_addr ;
-    struct sockaddr_in mcast_addr_legacy ;
-
-    version = std::string(exec_get_current_version()) ;
+    std::string version = std::string(exec_get_current_version()) ;
     version.erase(version.find_last_not_of(" \t\f\v\n\r")+1);
 
     pthread_setcanceltype(PTHREAD_CANCEL_ASYNCHRONOUS, NULL);
 
-    passp = getpwuid(getuid()) ;
-
+    // get username to broadcast on multicast channel
+    struct passwd *passp = getpwuid(getuid()) ;
+    std::string user_name;
     if ( passp == NULL ) {
         user_name = strdup("unknown") ;
     } else {
         user_name = strdup(passp->pw_name) ;
     }
-
-    tc_blockio(&listen_dev, TC_COMM_BLOCKIO);
+    
+    listener.setBlockMode(TC_COMM_BLOCKIO);
 
     if ( broadcast ) {
-        if ((mcast_socket = socket(AF_INET, SOCK_DGRAM, 0)) < 0) {
-            perror("vs_mcast_init socket");
-        }
-
-        value = 1;
-        if (setsockopt(mcast_socket, SOL_SOCKET, SO_REUSEADDR, (char *) &value, (socklen_t) sizeof(value)) < 0) {
-            perror("setsockopt: reuseaddr");
-        }
-#ifdef SO_REUSEPORT
-        if (setsockopt(mcast_socket, SOL_SOCKET, SO_REUSEPORT, (char *) &value, sizeof(value)) < 0) {
-            perror("setsockopt: reuseport");
-        }
-#endif
-
-        /* Set up destination address */
-        memset(&mcast_addr, 0, sizeof(mcast_addr));
-        mcast_addr.sin_family = AF_INET;
-        mcast_addr.sin_addr.s_addr = inet_addr("239.3.14.15");
-        mcast_addr.sin_port = htons((uint16_t) 9265);
-
-        memset(&mcast_addr_legacy, 0, sizeof(mcast_addr_legacy));
-        mcast_addr_legacy.sin_family = AF_INET;
-        mcast_addr_legacy.sin_addr.s_addr = inet_addr("224.3.14.15");
-        mcast_addr_legacy.sin_port = htons((uint16_t) 9265);
+        initializeMulticast();
     }
 
     while (1) {
 
-        FD_ZERO(&rfds);
-        FD_SET(listen_dev.socket, &rfds);
-        timeout_time.tv_sec = 2 ;
-        select(listen_dev.socket + 1, &rfds, NULL, NULL, &timeout_time);
-
-        if (FD_ISSET(listen_dev.socket, &rfds)) {
+        // Look for a new client requesting a connection
+        if (listener.checkForNewConnections()) {
             // pause here during restart
             pthread_mutex_lock(&restart_pause) ;
-            vst = new Trick::VariableServerThread(&listen_dev) ;
+
+            // Create a new thread to service this connection
+            VariableServerThread * vst = new Trick::VariableServerThread(&listener) ;
             vst->copy_cpus(get_cpus()) ;
             vst->create_thread() ;
             vst->wait_for_accept() ;
+
             pthread_mutex_unlock(&restart_pause) ;
         } else if ( broadcast ) {
+<<<<<<< HEAD
             snprintf(buf1 , sizeof(buf1), "%s\t%hu\t%s\t%d\t%s\t%s\t%s\t%s\t%s\t%hu\n" , listen_dev.hostname , (unsigned short)listen_dev.port ,
              user_name , (int)getpid() , command_line_args_get_default_dir() , command_line_args_get_cmdline_name() ,
              command_line_args_get_input_file() , version.c_str() , user_tag.c_str(), (unsigned short)listen_dev.port ) ;
+=======
+            // Otherwise, broadcast on the multicast channel if enabled
+            char buf1[1024];
+            sprintf(buf1 , "%s\t%hu\t%s\t%d\t%s\t%s\t%s\t%s\t%s\t%hu\n" , listener.getHostname(), (unsigned short)listener.getPort() ,
+             user_name.c_str() , (int)getpid() , command_line_args_get_default_dir() , command_line_args_get_cmdline_name() ,
+             command_line_args_get_input_file() , version.c_str() , user_tag.c_str(), (unsigned short)listener.getPort() ) ;
+>>>>>>> e8ba4328 (Encapsulated listen device into ClientListener)
 
-            sendto(mcast_socket , buf1 , strlen(buf1) , 0 , (struct sockaddr *)&mcast_addr , (socklen_t)sizeof(mcast_addr)) ;
-            sendto(mcast_socket , buf1 , strlen(buf1) , 0 , (struct sockaddr *)&mcast_addr_legacy , (socklen_t)sizeof(mcast_addr)) ;
+            std::string message = buf1;
+
+            if (!multicast.is_initialized()) {
+                // In case broadcast was turned on after this loop was entered
+                initializeMulticast();
+            }
+            multicast.broadcast(message);
         }
     }
 
@@ -203,38 +180,34 @@ int Trick::VariableServerListenThread::restart() {
 
     int ret ;
 
-    if ( user_port_requested ) {
+    if ( user_requested_address ) {
 
-        char hname[80];
-        static struct sockaddr_in s_in;
-        gethostname(hname, (size_t) 80);
-        // Test to see if the restart address is on this machine.  If it is not, it's not an error, clear source address
-        if ( strcmp( source_address.c_str(), hname )) {
-            if (! inet_pton(AF_INET, source_address.c_str(), (struct in_addr *)&s_in.sin_addr.s_addr) ) {
-                //printf("clearing source_address\n") ;
-                source_address.clear() ;
-            }
+        if (!listener.validateSourceAddress(requested_source_address)) {
+            requested_source_address.clear() ;
         }
 
-        printf("variable server restart user_port requested set %d\n", port) ;
-
-        tc_disconnect(&listen_dev) ;
-        ret = tc_init_with_connection_info(&listen_dev, AF_INET, SOCK_STREAM, source_address.c_str(), port) ;
+        listener.disconnect();
+        ret = listener.initialize(requested_source_address, requested_port);
+        
         if (ret != TC_SUCCESS) {
-            message_publish(MSG_ERROR, "ERROR: Could not establish listen port %d for Variable Server. Aborting.\n", port);
+            message_publish(MSG_ERROR, "ERROR: Could not establish listen port %d for Variable Server. Aborting.\n", requested_port);
             return (-1);
         }
     } else {
-        struct sockaddr_in s_in;
-        int s_in_size =  sizeof(s_in) ;
-        getsockname( listen_dev.socket , (struct sockaddr *)&s_in, (socklen_t *)&s_in_size) ;
-        printf("restart variable server message port = %d\n" , ntohs(s_in.sin_port)) ;
-        port = listen_dev.port = ntohs(s_in.sin_port);
+        listener.checkSocket();
     }
 
+    initializeMulticast();
+
     return 0 ;
 }
 
+void Trick::VariableServerListenThread::initializeMulticast() {
+    multicast.initialize();
+    multicast.addAddress("239.3.14.15", 9265);
+    multicast.addAddress("224.3.14.15", 9265);
+}
+
 void Trick::VariableServerListenThread::pause_listening() {
     pthread_mutex_lock(&restart_pause) ;
 }
@@ -245,9 +218,9 @@ void Trick::VariableServerListenThread::restart_listening() {
 
 void Trick::VariableServerListenThread::dump( std::ostream & oss ) {
     oss << "Trick::VariableServerListenThread (" << name << ")" << std::endl ;
-    oss << "    source_address = " << source_address << std::endl ;
-    oss << "    port = " << port << std::endl ;
-    oss << "    user_port_requested = " << user_port_requested << std::endl ;
+    oss << "    source_address = " << listener.getHostname() << std::endl ;
+    oss << "    port = " << listener.getPort() << std::endl ;
+    oss << "    user_requested_address = " << user_requested_address << std::endl ;
     oss << "    user_tag = " << user_tag << std::endl ;
     oss << "    broadcast = " << broadcast << std::endl ;
     Trick::ThreadBase::dump(oss) ;

trick_source/sim_services/VariableServer/VariableServerSession.cpp

@@ -0,0 +1,139 @@
+#include "trick/VariableServerSession.hh"
+#include "trick/TrickConstant.hh"
+#include "trick/exec_proto.h"
+#include "trick/message_proto.h"
+#include "trick/input_processor_proto.h"
+#include "trick/realtimesync_proto.h"
+
+
+Trick::VariableServerSession::VariableServerSession(ClientConnection * conn) {
+    debug = 0;
+    enabled = true ;
+    log = false ;
+    copy_mode = VS_COPY_ASYNC ;
+    write_mode = VS_WRITE_ASYNC ;
+    frame_multiple = 1 ;
+    frame_offset = 0 ;
+    freeze_frame_multiple = 1 ;
+    freeze_frame_offset = 0 ;
+    update_rate = 0.1 ;
+    cycle_tics = (long long)(update_rate * exec_get_time_tic_value()) ;
+    if (cycle_tics == 0) {
+        cycle_tics = 1;
+    }
+
+    next_tics = TRICK_MAX_LONG_LONG ;
+    freeze_next_tics = TRICK_MAX_LONG_LONG ;
+    // multicast = false;
+    connection = conn;
+    byteswap = false ;
+    validate_address = false ;
+    send_stdio = false ;
+
+    binary_data = false;
+    byteswap = false;
+    binary_data_nonames = false;
+    packets_copied = 0 ;
+
+    exit_cmd = false;
+    pause_cmd = false;
+
+
+    // incoming_msg = (char *) calloc(MAX_CMD_LEN, 1);
+    // stripped_msg = (char *) calloc(MAX_CMD_LEN, 1);
+
+
+    pthread_mutex_init(&copy_mutex, NULL);
+}
+
+Trick::VariableServerSession::~VariableServerSession() {
+    // free (incoming_msg);
+    // free (stripped_msg);
+}
+
+// Command to turn on log to varserver_log file
+int Trick::VariableServerSession::set_log_on() {
+    log = true;
+    return(0) ;
+}
+
+// Command to turn off log to varserver_log file
+int Trick::VariableServerSession::set_log_off() {
+    log = false;
+    return(0) ;
+}
+
+void Trick::VariableServerSession::disconnect_references() {
+    for (VariableReference * variable : session_variables) {
+        variable->tagAsInvalid();
+    }
+}
+
+long long Trick::VariableServerSession::get_next_tics() const {
+    if ( ! enabled ) {
+        return TRICK_MAX_LONG_LONG ;
+    }
+    return next_tics ;
+}
+
+long long Trick::VariableServerSession::get_freeze_next_tics() const {
+    if ( ! enabled ) {
+        return TRICK_MAX_LONG_LONG ;
+    }
+    return freeze_next_tics ;
+}
+
+int Trick::VariableServerSession::handleMessage() {
+
+    std::string received_message = connection->read(ClientConnection::MAX_CMD_LEN);
+    if (received_message.size() > 0) {
+        ip_parse(received_message.c_str()); /* returns 0 if no parsing error */
+    }
+    
+}
+
+Trick::VariableReference * Trick::VariableServerSession::find_session_variable(std::string name) const {
+    for (VariableReference * ref : session_variables) {
+        // Look for matching name
+        if (name.compare(ref->getName()) == 0) {
+            return ref;
+        }
+    }
+
+    return NULL;
+}
+
+double Trick::VariableServerSession::get_update_rate() const {
+    return update_rate;
+}
+
+VS_WRITE_MODE Trick::VariableServerSession::get_write_mode () const {
+    return write_mode;
+}
+
+VS_COPY_MODE Trick::VariableServerSession::get_copy_mode () const {
+    return copy_mode;
+}
+
+std::ostream& Trick::operator<< (std::ostream& s, const Trick::VariableServerSession& session) {
+    if (session.binary_data) {
+        s << "    \"format\":\"BINARY\",\n";
+    } else {
+        s << "    \"format\":\"ASCII\",\n";
+    }
+    s << "    \"update_rate\":" << session.get_update_rate() << ",\n";
+
+    s << "    \"variables\":[\n";
+
+    int n_vars = (int)session.session_variables.size();
+    for (int i=0 ; i<n_vars ; i++) {
+        s << *(session.session_variables[i]);
+        if ((n_vars-i)>1) {
+            s << "," ;
+        }
+        s << "\n";
+    }
+    s << "    ]\n";
+
+    return s;
+}

trick_source/sim_services/VariableServer/VariableServerSession_commands.cpp

@@ -0,0 +1,401 @@
+
+#include <string.h>
+#include <iostream>
+#include <sstream>
+#include <stdlib.h>
+#include <udunits2.h>
+#include "trick/VariableServerSession.hh"
+#include "trick/variable_server_message_types.h"
+#include "trick/memorymanager_c_intf.h"
+// #include "trick/tc_proto.h"
+#include "trick/exec_proto.h"
+#include "trick/command_line_protos.h"
+#include "trick/message_proto.h"
+#include "trick/message_type.h"
+#include "trick/TrickConstant.hh"
+#include "trick/sie_c_intf.h"
+#include "trick/UdUnits.hh"
+#include "trick/map_trick_units_to_udunits.hh"
+
+
+int Trick::VariableServerSession::var_add(std::string in_name) {
+    VariableReference * new_var;
+    if (in_name == "time") {
+        new_var = new VariableReference(in_name, &time);
+    } else {
+        new_var = new VariableReference(in_name);
+    }
+
+    session_variables.push_back(new_var) ;
+
+    return(0) ;
+}
+
+int Trick::VariableServerSession::var_add(std::string var_name, std::string units_name) {
+    var_add(var_name) ;
+    var_units(var_name, units_name) ;
+    return(0) ;
+}
+
+// Helper function for var_send_once
+std::vector<std::string> split (const std::string& str, const char delim) {
+    std::stringstream ss(str);
+    std::string s;
+    std::vector<std::string> ret;
+    while (std::getline(ss, s, delim)) {
+        ret.push_back(s);
+    }
+    return ret;
+}
+
+int Trick::VariableServerSession::var_send_once(std::string in_name, int num_vars) {
+    std::vector<std::string> var_names = split(in_name, ',');
+
+    if (var_names.size() != num_vars) {
+        message_publish(MSG_ERROR, "Number of variables sent to var_send_once (%d) does not match num_vars (%d).\n", var_names.size(), num_vars);
+        return -1;
+    }
+
+    std::vector<VariableReference *> given_vars;
+    for (auto& varName : var_names) {
+        VariableReference * new_var;
+        if (varName == "time") {
+            new_var = new VariableReference(varName, &time);
+        } else {
+            new_var = new VariableReference(varName);
+        }
+        given_vars.push_back(new_var);
+    }
+    copy_sim_data(given_vars, false);
+    write_data(given_vars, VS_SEND_ONCE);
+
+    return(0) ;
+}
+
+
+int Trick::VariableServerSession::var_remove(std::string in_name) {
+
+    for (unsigned int ii = 0 ; ii < session_variables.size() ; ii++ ) {
+        std::string var_name = session_variables[ii]->getName();
+        if ( ! var_name.compare(in_name) ) {
+            delete session_variables[ii];
+            session_variables.erase(session_variables.begin() + ii) ;
+            break ;
+        }
+    }
+
+    return(0) ;
+
+}
+
+int Trick::VariableServerSession::var_units(std::string var_name, std::string units_name) {    
+    VariableReference * variable = find_session_variable(var_name);
+
+    if (variable == NULL) {
+        // TODO: ERROR LOGGER HERE
+        return -1;
+    }
+
+    return variable->setRequestedUnits(units_name);
+}
+
+int Trick::VariableServerSession::var_exists(std::string in_name) {
+    char buf1[5] ;
+    bool error = false ;
+
+    unsigned int msg_type ;
+    REF2* var_ref = ref_attributes(in_name.c_str());
+
+    if ( var_ref == (REF2*)NULL ) {
+        error = true;
+    }
+
+    if (binary_data) {
+        /* send binary 1 or 0 */
+        msg_type = VS_VAR_EXISTS ;
+        memcpy(buf1, &msg_type , sizeof(msg_type)) ;
+
+        buf1[4] = (error==false);
+
+        if (debug >= 2) {
+            // message_publish(MSG_DEBUG, "%p tag=<%s> var_server sending 1 binary byte\n", &connection, connection.client_tag);
+        }
+
+        connection->write(buf1, 5);
+    } else {
+        /* send ascii "1" or "0" */
+        sprintf(buf1, "%d\t%d\n", VS_VAR_EXISTS, (error==false));
+        if (debug >= 2) {
+            // message_publish(MSG_DEBUG, "%p tag=<%s> var_server sending:\n%s\n", &connection, connection.client_tag, buf1) ;
+        }
+        std::string write_string(buf1);
+        if (write_string.length() != strlen(buf1)) {
+            std::cout << "PROBLEM WITH STRING LENGTH: VAR_EXISTS ASCII" << std::endl;
+        }
+        connection->write(write_string);
+    }
+
+    return(0) ;
+}
+
+int Trick::VariableServerSession::var_clear() {
+
+    while( !session_variables.empty() ) {
+        delete session_variables.back();
+        session_variables.pop_back();
+    }
+
+    return(0) ;
+}
+
+int Trick::VariableServerSession::var_send() {
+    copy_sim_data();
+    write_data();
+    return(0) ;
+}
+
+int Trick::VariableServerSession::var_cycle(double in_rate) {
+    update_rate = in_rate ;
+    cycle_tics = (long long)(update_rate * exec_get_time_tic_value()) ;
+    return(0) ;
+}
+
+bool Trick::VariableServerSession::get_pause() {
+    return pause_cmd ;
+}
+
+void Trick::VariableServerSession::set_pause( bool on_off) {
+    pause_cmd = on_off ;
+}
+
+int Trick::VariableServerSession::var_exit() {
+    exit_cmd = true ;
+    return(0) ;
+}
+
+int Trick::VariableServerSession::var_validate_address(bool on_off) {
+    validate_address = on_off ;
+    return(0) ;
+}
+
+int Trick::VariableServerSession::var_debug(int level) {
+    debug = level ;
+    return(0) ;
+}
+
+int Trick::VariableServerSession::var_ascii() {
+    binary_data = 0 ;
+    return(0) ;
+}
+
+int Trick::VariableServerSession::var_binary() {
+    binary_data = 1 ;
+    return(0) ;
+}
+
+int Trick::VariableServerSession::var_binary_nonames() {
+    binary_data = 1 ;
+    binary_data_nonames = 1 ;
+    return(0) ;
+}
+
+int Trick::VariableServerSession::var_set_copy_mode(int mode) {
+    if ( mode >= VS_COPY_ASYNC and mode <= VS_COPY_TOP_OF_FRAME ) {
+        copy_mode = (VS_COPY_MODE)mode ;
+        if ( copy_mode == VS_COPY_SCHEDULED ) {
+            long long sim_time_tics ;
+            sim_time_tics = exec_get_time_tics() ;
+            // round the next call time to a multiple of the cycle
+            sim_time_tics -= sim_time_tics % cycle_tics ;
+            next_tics = sim_time_tics + cycle_tics ;
+
+            sim_time_tics = exec_get_freeze_time_tics() ;
+            // round the next call time to a multiple of the cycle
+            sim_time_tics -= sim_time_tics % cycle_tics ;
+            freeze_next_tics = sim_time_tics + cycle_tics ;
+
+        } else {
+            next_tics = TRICK_MAX_LONG_LONG ;
+        }
+        return 0 ;
+    }
+    return -1 ;
+}
+
+int Trick::VariableServerSession::var_set_write_mode(int mode) {
+    if ( mode >= VS_WRITE_ASYNC and mode <= VS_WRITE_WHEN_COPIED ) {
+        write_mode = (VS_WRITE_MODE)mode ;
+        return 0 ;
+    }
+    return -1 ;
+}
+
+int Trick::VariableServerSession::var_sync(int mode) {
+
+    switch (mode) {
+        case 1:
+            var_set_copy_mode(VS_COPY_SCHEDULED) ;
+            var_set_write_mode(VS_WRITE_ASYNC) ;
+            break ;
+        case 2:
+            var_set_copy_mode(VS_COPY_SCHEDULED) ;
+            var_set_write_mode(VS_WRITE_WHEN_COPIED) ;
+            break ;
+        case 0:
+        default:
+            var_set_copy_mode(VS_COPY_ASYNC) ;
+            var_set_write_mode(VS_WRITE_ASYNC) ;
+            break ;
+    }
+
+    return 0 ;
+}
+
+int Trick::VariableServerSession::var_set_frame_multiple(unsigned int mult) {
+    frame_multiple = mult ;
+    return 0 ;
+}
+
+int Trick::VariableServerSession::var_set_frame_offset(unsigned int offset) {
+    frame_offset = offset ;
+    return 0 ;
+}
+
+int Trick::VariableServerSession::var_set_freeze_frame_multiple(unsigned int mult) {
+    freeze_frame_multiple = mult ;
+    return 0 ;
+}
+
+int Trick::VariableServerSession::var_set_freeze_frame_offset(unsigned int offset) {
+    freeze_frame_offset = offset ;
+    return 0 ;
+}
+
+int Trick::VariableServerSession::var_byteswap(bool on_off) {
+    byteswap = on_off ;
+    return(0) ;
+}
+
+bool Trick::VariableServerSession::get_send_stdio() {
+    return send_stdio ;
+}
+
+int Trick::VariableServerSession::set_send_stdio(bool on_off) {
+    send_stdio = on_off ;
+    return(0) ;
+}
+
+int Trick::VariableServerSession::send_list_size() {
+    
+    unsigned int msg_type = VS_LIST_SIZE;
+    int var_count = session_variables.size();
+
+    // send number of variables
+    if (binary_data) {
+        // send in the binary message header format:
+        // <message_indicator><message_size><number_of_variables>
+        char buf1[12] ;
+
+        unsigned int msg_type = VS_LIST_SIZE;
+        memcpy(buf1, &msg_type , sizeof(msg_type)) ;
+
+        memset(&(buf1[4]), 0, sizeof(int)); // message size = 0
+        memcpy(&(buf1[8]), &var_count, sizeof(var_count));
+
+        if (debug >= 2) {
+            message_publish(MSG_DEBUG, "%p tag=<%s> var_server sending %d event variables\n", connection, connection->get_client_tag().c_str(), var_count);
+        }
+
+        connection->write(buf1, sizeof (buf1));
+    } else {
+        std::stringstream write_string;
+        write_string << VS_LIST_SIZE << "\t" << var_count << "\n";
+        // ascii
+        if (debug >= 2) {
+            message_publish(MSG_DEBUG, "%p tag=<%s> var_server sending number of event variables:\n%s\n", connection, connection->get_client_tag().c_str(), write_string.str().c_str()) ;
+        }
+
+        connection->write(write_string.str());
+    }
+
+    return 0 ;
+}
+
+int Trick::VariableServerSession::transmit_file(std::string sie_file) {
+    const unsigned int packet_size = 4095 ;
+    FILE * fp ;
+    unsigned int file_size ;
+    unsigned int current_size = 0 ;
+    unsigned int bytes_read ;
+    char buffer[packet_size+1] ;
+    int ret ;
+
+    if (debug >= 2) {
+        message_publish(MSG_DEBUG,"%p tag=<%s> var_server opening %s.\n", connection, connection->get_client_tag().c_str(), sie_file.c_str()) ;
+    }
+
+    if ((fp = fopen(sie_file.c_str() , "r")) == NULL ) {
+        message_publish(MSG_ERROR,"Variable Server Error: Cannot open %s.\n", sie_file.c_str()) ;
+        sprintf(buffer, "%d\t-1\n", VS_SIE_RESOURCE) ;
+        std::string message(buffer);
+        connection->write(message);
+        return(-1) ;
+    }
+
+    fseek(fp , 0L, SEEK_END) ;
+    file_size = ftell(fp) ;
+
+    sprintf(buffer, "%d\t%u\n\0" , VS_SIE_RESOURCE, file_size) ;
+    std::string message(buffer);
+    connection->write(message);
+    rewind(fp) ;
+
+    // Switch to blocking writes since this could be a large transfer.
+    if (connection->setBlockMode(TC_COMM_BLOCKIO)) {
+        message_publish(MSG_DEBUG,"Variable Server Error: Failed to set TCDevice to TC_COMM_BLOCKIO.\n");
+    }
+
+    while ( current_size < file_size ) {
+        bytes_read = fread(buffer , 1 , packet_size , fp) ;
+        message = std::string(buffer);
+        message.resize(bytes_read);
+        ret = connection->write(message);
+        if (ret != (int)bytes_read) {
+            message_publish(MSG_ERROR,"Variable Server Error: Failed to send SIE file. Bytes read: %d Bytes sent: %d\n", bytes_read, ret) ;
+            return(-1);
+        }
+        current_size += bytes_read ;
+    }
+
+    // Switch back to non-blocking writes.
+    if (connection->setBlockMode(TC_COMM_NOBLOCKIO)) {
+        message_publish(MSG_ERROR,"Variable Server Error: Failed to set TCDevice to TC_COMM_NOBLOCKIO.\n");
+        return(-1);
+    }
+
+    return(0) ;
+}
+
+int Trick::VariableServerSession::send_file(std::string file_name) {
+    return transmit_file(file_name) ;
+}
+
+int Trick::VariableServerSession::send_sie_resource() {
+    sie_append_runtime_objs() ;
+    return transmit_file(std::string(command_line_args_get_default_dir()) + "/S_sie.resource") ;
+}
+
+int Trick::VariableServerSession::send_sie_class() {
+    sie_class_attr_map_print_xml() ;
+    return transmit_file(std::string(command_line_args_get_default_dir()) + "/" + "S_sie_class.xml") ;
+}
+
+int Trick::VariableServerSession::send_sie_enum() {
+    sie_enum_attr_map_print_xml() ;
+    return transmit_file(std::string(command_line_args_get_default_dir()) + "/" + "S_sie_enum.xml") ;
+}
+
+int Trick::VariableServerSession::send_sie_top_level_objects() {
+    sie_top_level_objects_print_xml() ;
+    return transmit_file(std::string(command_line_args_get_default_dir()) + "/" + "S_sie_top_level_objects.xml") ;
+}

trick_source/sim_services/VariableServer/VariableServerSession_copy_data.cpp

@@ -2,12 +2,14 @@
 #include <iostream>
 #include <string.h>
 
-#include "trick/VariableServer.hh"
+#include "trick/VariableServerSession.hh"
 #include "trick/variable_server_sync_types.h"
 #include "trick/exec_proto.h"
 #include "trick/realtimesync_proto.h"
 
-int Trick::VariableServerThread::copy_data_freeze() {
+// These methods should be called from main thread jobs
+
+int Trick::VariableServerSession::copy_data_freeze() {
 
     int ret = 0 ;
     long long curr_frame = exec_get_freeze_frame_count() ;
@@ -28,7 +30,7 @@ int Trick::VariableServerThread::copy_data_freeze() {
     return ret ;
 }
 
-int Trick::VariableServerThread::copy_data_freeze_scheduled(long long curr_tics) {
+int Trick::VariableServerSession::copy_data_freeze_scheduled(long long curr_tics) {
 
     int ret = 0 ;
 
@@ -47,7 +49,7 @@ int Trick::VariableServerThread::copy_data_freeze_scheduled(long long curr_tics)
     return ret ;
 }
 
-int Trick::VariableServerThread::copy_data_scheduled(long long curr_tics) {
+int Trick::VariableServerSession::copy_data_scheduled(long long curr_tics) {
 
     int ret = 0 ;
 
@@ -66,7 +68,7 @@ int Trick::VariableServerThread::copy_data_scheduled(long long curr_tics) {
     return ret ;
 }
 
-int Trick::VariableServerThread::copy_data_top() {
+int Trick::VariableServerSession::copy_data_top() {
 
     int ret = 0 ;
     long long curr_frame = exec_get_frame_count() ;

trick_source/sim_services/VariableServer/VariableServerSession_copy_sim_data.cpp

@@ -0,0 +1,35 @@
+
+#include <iostream>
+#include <string.h>
+
+#include "trick/VariableServerSession.hh"
+#include "trick/memorymanager_c_intf.h"
+#include "trick/exec_proto.h"
+
+
+// These actually do the copying
+
+int Trick::VariableServerSession::copy_sim_data() {
+    return copy_sim_data(session_variables, true);
+}
+
+int Trick::VariableServerSession::copy_sim_data(std::vector<VariableReference *>& given_vars, bool cyclical) {
+
+    if (given_vars.size() == 0) {
+        return 0;
+    }
+
+    if ( pthread_mutex_trylock(&copy_mutex) == 0 ) {
+        // Get the simulation time we start this copy
+        time = (double)exec_get_time_tics() / exec_get_time_tic_value() ;
+        
+
+        for (auto curr_var : given_vars ) {
+            curr_var->stageValue();
+        }
+
+        pthread_mutex_unlock(&copy_mutex) ;
+    }
+
+    return 0;
+}

trick_source/sim_services/VariableServer/VariableServerSession_freeze_init.cpp

@@ -2,11 +2,11 @@
 #include <iostream>
 #include <string.h>
 
-#include "trick/VariableServerThread.hh"
+#include "trick/VariableServerSession.hh"
 #include "trick/TrickConstant.hh"
 
-int Trick::VariableServerThread::freeze_init() {
-    if ( enabled and copy_mode == VS_COPY_SCHEDULED) {
+int Trick::VariableServerSession::freeze_init() {
+    if ( enabled && copy_mode == VS_COPY_SCHEDULED) {
         freeze_next_tics = cycle_tics ;
     } else {
         freeze_next_tics = TRICK_MAX_LONG_LONG ;

trick_source/sim_services/VariableServer/VariableServerSession_write_data.cpp

@@ -0,0 +1,188 @@
+/*
+PURPOSE:      (Allows clients to get and set Trick parameters)
+PROGRAMMERS: (((Alex Lin) (NASA) (8/06) (--)))
+*/
+
+#include <iostream>
+#include <sstream>
+#include <pthread.h>
+#include <iomanip> // for setprecision
+#include "trick/VariableServerSession.hh"
+#include "trick/parameter_types.h"
+#include "trick/bitfield_proto.h"
+#include "trick/trick_byteswap.h"
+#include "trick/tc_proto.h"
+#include "trick/message_proto.h"
+#include "trick/message_type.h"
+
+
+extern "C" {
+    void *trick_bswap_buffer(void *out, void *in, ATTRIBUTES * attr, int tofrom) ;
+}
+
+#define MAX_MSG_LEN    8192
+
+
+int Trick::VariableServerSession::write_binary_data(const std::vector<VariableReference *>& given_vars, VS_MESSAGE_TYPE message_type) {
+    // Some constants to make size calculations more readable
+    static const int header_size = 12;
+    static const int sizeof_size = 4;
+    static const int type_size = 4;
+
+    std::vector<std::pair<int,int>> message_sizes_and_num_vars;
+
+    // Calculate how many messages and how many vars in each
+    int total_size = header_size;
+    int num_vars = 0;
+    for (int i = 0; i < given_vars.size(); i++) {
+        const VariableReference * var = given_vars[i];
+        int total_var_size = 0;
+        if (!binary_data_nonames) {
+            total_var_size += sizeof_size;
+            total_var_size += strlen(var->getName());
+        }
+
+        total_var_size += type_size;
+        total_var_size += sizeof_size;
+        total_var_size += var->getSizeBinary();
+
+        // If this variable won't fit in the current message, truncate the message and plan to put this var in a new one
+        if (total_size + total_var_size > MAX_MSG_LEN) {
+            message_sizes_and_num_vars.push_back(std::pair<int,int>(total_size, num_vars));
+            total_size = header_size;
+            num_vars = 0;
+        }
+        total_size += total_var_size;
+        num_vars++;
+    }
+
+    message_sizes_and_num_vars.push_back(std::pair<int,int>(total_size, num_vars));
+    
+    // Now write out all of these messages
+    int var_index = 0;
+    for (std::pair<int,int> message_info : message_sizes_and_num_vars) {
+        int curr_message_size = message_info.first;
+        int curr_message_num_vars = message_info.second;
+
+        std::stringstream stream;
+
+        int written_message_type = message_type;
+        int written_header_size = curr_message_size - 4;
+        int written_num_vars = curr_message_num_vars;
+
+        if (byteswap) {
+            written_message_type = trick_byteswap_int(written_message_type);
+            written_header_size = trick_byteswap_int(written_header_size);
+            written_num_vars = trick_byteswap_int(written_num_vars);
+        }
+
+        // Write the header first
+        stream.write((char *)(&written_message_type), sizeof(int)); 
+        stream.write((char *)(&written_header_size), sizeof(int)); 
+        stream.write ((char *)(&written_num_vars), sizeof(int));
+
+        // Write variables next
+        for (int i = var_index; i < var_index + curr_message_num_vars; i++) {
+            VariableReference * var = given_vars[i];
+            if (!binary_data_nonames) {
+                var->writeNameBinary(stream, byteswap);
+            }
+            var->writeTypeBinary(stream, byteswap);
+            var->writeSizeBinary(stream, byteswap);
+            var->writeValueBinary(stream, byteswap);
+        }
+        var_index += curr_message_num_vars;
+
+        char write_buf[MAX_MSG_LEN];
+        stream.read(write_buf, curr_message_size);
+        connection->write(write_buf, curr_message_size);
+    }
+
+    return 0;
+}
+
+int Trick::VariableServerSession::write_ascii_data(const std::vector<VariableReference *>& given_vars, VS_MESSAGE_TYPE message_type ) {
+    // Load message type first
+    std::stringstream message_stream;
+    message_stream << (int)message_type;
+
+    int message_size = message_stream.str().size();
+
+    // Load each variable
+    for (int i = 0; i < given_vars.size(); i++) {
+        message_stream << "\t";
+
+        std::stringstream var_stream;
+        if (given_vars[i]->writeValueAscii(var_stream) == -1) {
+            // If one of the values isn't ready, we need to abort the write
+            return 0;
+        }
+
+        std::string var_string = var_stream.str();
+        int var_size = var_string.size();
+
+        // Check that there's enough room for the next variable, tab character, and possible newline
+        if (message_size + var_size + 2 > MAX_MSG_LEN) {
+            
+            // Write out an incomplete message
+            std::string message = message_stream.str();
+            int result = connection->write(message);
+            if (result < 0)
+                return result;
+            // Clear out the message stream
+            message_stream.str("");
+            message_size = 0;
+        }
+
+        // Concatenate
+        message_stream << var_string;
+        message_size += var_size + 1;
+    }
+
+
+    // End with newline
+    message_stream << '\n';
+    std::string message = message_stream.str();
+    int result = connection->write(message);
+    return result;
+}
+
+int Trick::VariableServerSession::write_data() {
+    return write_data(session_variables, VS_VAR_LIST);
+}
+
+int Trick::VariableServerSession::write_data(std::vector<VariableReference *>& given_vars, VS_MESSAGE_TYPE message_type) { 
+    // do not send anything when there are no variables!
+    if ( given_vars.size() == 0) {
+        return(0);
+    }
+
+    int result = 0;
+
+    if ( pthread_mutex_trylock(&copy_mutex) == 0 ) {
+        // Check that all of the variables are staged
+        for (VariableReference * variable : given_vars ) {
+            if (!variable->isStaged()) {
+                pthread_mutex_unlock(&copy_mutex) ;
+                return 1;
+            }
+        }
+
+        // Swap buffer_in and buffer_out for each vars[ii].
+        for (VariableReference * variable : given_vars ) {
+            variable->prepareForWrite();
+        }
+
+        pthread_mutex_unlock(&copy_mutex) ;
+
+        // Send out in correct format
+        if (binary_data) {
+            result = write_binary_data(given_vars, message_type );
+        } else {
+            // ascii mode
+            result = write_ascii_data(given_vars, message_type );
+        }
+    }
+
+    return result;
+}

trick_source/sim_services/VariableServer/VariableServerSession_write_stdio.cpp

@@ -0,0 +1,17 @@
+#include <sstream>
+
+#include "trick/VariableServerSession.hh"
+#include "trick/variable_server_message_types.h"
+#include "trick/tc_proto.h"
+
+int Trick::VariableServerSession::write_stdio(int stream, std::string text) {
+    
+    std::stringstream outstream;
+
+    outstream << VS_STDIO << " " << stream << " " << (int)text.length() << "\n";
+    outstream << text;
+
+    connection->write(outstream.str());
+
+    return 0 ;
+}

trick_source/sim_services/VariableServer/VariableServerThread.cpp

@@ -7,73 +7,32 @@
 
 Trick::VariableServer * Trick::VariableServerThread::vs = NULL ;
 
-Trick::VariableServerThread::VariableServerThread(TCDevice * in_listen_dev) :
- Trick::SysThread("VarServer", true) ,
- listen_dev(in_listen_dev) {
+Trick::VariableServerThread::VariableServerThread(ClientListener * in_listen_dev) :
+ Trick::SysThread("VarServer") , debug(0),
+ listener(in_listen_dev), session(NULL) {
 
-    debug = 0 ;
-    enabled = true ;
-    log = false ;
-    connection_accepted = false ;
-    conn_type = TCP ;
-    copy_mode = VS_COPY_ASYNC ;
-    write_mode = VS_WRITE_ASYNC ;
-    frame_multiple = 1 ;
-    frame_offset = 0 ;
-    freeze_frame_multiple = 1 ;
-    freeze_frame_offset = 0 ;
-    binary_data = false;
-    multicast = false;
-    byteswap = false ;
+    connection_status = CONNECTION_PENDING ;
 
-    pause_cmd = false ;
-    exit_cmd = false ;
+    connection.initialize();
 
-    validate_address = false ;
-    send_stdio = false ;
+    pthread_mutex_init(&connection_status_mutex, NULL);
+    pthread_cond_init(&connection_status_cv, NULL);
 
-    update_rate = 0.1 ;
-    cycle_tics = (long long)(update_rate * exec_get_time_tic_value()) ;
-
-    next_tics = TRICK_MAX_LONG_LONG ;
-    freeze_next_tics = TRICK_MAX_LONG_LONG ;
-
-    connection.disabled = TC_COMM_FALSE ;
-    connection.disable_handshaking = TC_COMM_TRUE ;
-    connection.blockio_limit = 0.0 ;
-    connection.blockio_type = TC_COMM_BLOCKIO ;
-    connection.client_id = 0 ;
-    strcpy(connection.client_tag, "") ;
-    connection.error_handler = (TrickErrorHndlr *) calloc(1, (int)sizeof(TrickErrorHndlr));
-    connection.error_handler->report_level = TRICK_ERROR_CAUTION;
-
-    pthread_mutex_init(&copy_mutex, NULL);
     pthread_mutex_init(&restart_pause, NULL);
 
-    var_data_staged = false;
-    packets_copied = 0 ;
-
-    incoming_msg = (char *) calloc(1, MAX_CMD_LEN);
-    stripped_msg = (char *) calloc(1, MAX_CMD_LEN);
-
-}
-
-Trick::VariableServerThread::~VariableServerThread() {
-    free( incoming_msg ) ;
-    free( stripped_msg ) ;
 }
 
+Trick::VariableServerThread::~VariableServerThread() {}
 
 std::ostream& Trick::operator<< (std::ostream& s, Trick::VariableServerThread& vst) {
-
     // Write a JSON representation of a Trick::VariableServerThread to an ostream.
     struct sockaddr_in otherside;
     socklen_t len = (socklen_t)sizeof(otherside);
 
     s << "  \"connection\":{\n";
-    s << "    \"client_tag\":\"" << vst.connection.client_tag << "\",\n";
+    s << "    \"client_tag\":\"" << vst.connection.get_client_tag() << "\",\n";
 
-    int err = getpeername(vst.connection.socket, (struct sockaddr*)&otherside, &len);
+    int err = getpeername(vst.connection.get_socket(), (struct sockaddr*)&otherside, &len);
 
     if (err == 0) {
         s << "    \"client_IP_address\":\"" << inet_ntoa(otherside.sin_addr) << "\",\n";
@@ -83,24 +42,8 @@ std::ostream& Trick::operator<< (std::ostream& s, Trick::VariableServerThread& v
         s << "    \"client_port\":\"unknown\",";
     }
 
-    if (vst.binary_data) {
-        s << "    \"format\":\"BINARY\",\n";
-    } else {
-        s << "    \"format\":\"ASCII\",\n";
-    }
-    s << "    \"update_rate\":" << vst.update_rate << ",\n";
+    s << *(vst.session);
 
-    s << "    \"variables\":[\n";
-
-    int n_vars = (int)vst.vars.size();
-    for (int i=0 ; i<n_vars ; i++) {
-        s << *(vst.vars[i]);
-        if ((n_vars-i)>1) {
-            s << "," ;
-        }
-        s << "\n";
-    }
-    s << "    ]\n";
     s << "  }" << std::endl;
     return s;
 }
@@ -109,38 +52,60 @@ void Trick::VariableServerThread::set_vs_ptr(Trick::VariableServer * in_vs) {
     vs = in_vs ;
 }
 
-// Command to turn on log to varserver_log file
-int Trick::VariableServerThread::set_log_on() {
-    log = true;
-    return(0) ;
-}
-
-// Command to turn off log to varserver_log file
-int Trick::VariableServerThread::set_log_off() {
-    log = false;
-    return(0) ;
-}
-
-long long Trick::VariableServerThread::get_next_tics() {
-    if ( ! enabled ) {
-        return TRICK_MAX_LONG_LONG ;
-    }
-    return next_tics ;
-}
-
-long long Trick::VariableServerThread::get_freeze_next_tics() {
-    if ( ! enabled ) {
-        return TRICK_MAX_LONG_LONG ;
-    }
-    return freeze_next_tics ;
-}
-
 Trick::VariableServer * Trick::VariableServerThread::get_vs() {
     return vs ;
 }
 
-TCDevice & Trick::VariableServerThread::get_connection() {
-    return connection ;
+void Trick::VariableServerThread::set_client_tag(std::string tag) {
+    connection.set_client_tag(tag);
+}
+
+Trick::ConnectionStatus Trick::VariableServerThread::wait_for_accept() {
+
+    pthread_mutex_lock(&connection_status_mutex);
+    while ( connection_status == CONNECTION_PENDING ) {
+        pthread_cond_wait(&connection_status_cv, &connection_status_mutex);
+    }
+    pthread_mutex_unlock(&connection_status_mutex);
+
+    return connection_status;
+}
+
+// This should maybe go somewhere completely different
+// Leaving it in thread for now
+// Gets called from the main thread as a job
+void Trick::VariableServerThread::preload_checkpoint() {
+
+    // Stop variable server processing at the top of the processing loop.
+    pthread_mutex_lock(&restart_pause);
+
+    // Let the thread complete any data copying it has to do
+    // and then suspend data copying until the checkpoint is reloaded.
+    pthread_mutex_lock(&(session->copy_mutex));
+
+    // Save the pause state of this thread.
+    saved_pause_cmd = session->get_pause();
+
+    // Disallow data writing.
+    session->set_pause(true);
+
+    // Temporarily "disconnect" the variable references from Trick Managed Memory
+    // by tagging each as a "bad reference".
+    session->disconnect_references();
+
+
+    // Allow data copying to continue.
+    pthread_mutex_unlock(&(session->copy_mutex));
+
+}
+
+// Gets called from the main thread as a job
+void Trick::VariableServerThread::restart() {
+    // Set the pause state of this thread back to its "pre-checkpoint reload" state.
+    session->set_pause(saved_pause_cmd) ;
+
+    // Restart the variable server processing.
+    pthread_mutex_unlock(&restart_pause);
 }
 
 

trick_source/sim_services/VariableServer/VariableServerThread_commands.cpp

@@ -1,516 +0,0 @@
-
-#include <string.h>
-#include <iostream>
-#include <sstream>
-#include <stdlib.h>
-#include <udunits2.h>
-#include "trick/VariableServer.hh"
-#include "trick/variable_server_message_types.h"
-#include "trick/memorymanager_c_intf.h"
-#include "trick/tc_proto.h"
-#include "trick/exec_proto.h"
-#include "trick/command_line_protos.h"
-#include "trick/message_proto.h"
-#include "trick/message_type.h"
-#include "trick/TrickConstant.hh"
-#include "trick/sie_c_intf.h"
-#include "trick/UdUnits.hh"
-#include "trick/map_trick_units_to_udunits.hh"
-
-int Trick::VariableServerThread::bad_ref_int = 0 ;
-int Trick::VariableServerThread::do_not_resolve_bad_ref_int = 0 ;
-
-REF2* Trick::VariableServerThread::make_time_ref() {
-    REF2* new_ref;
-    new_ref = (REF2*)calloc(1, sizeof(REF2));
-    new_ref->reference = strdup("time") ;
-    new_ref->units = strdup("s") ;
-    new_ref->address = (char *)&time ;
-    new_ref->attr = (ATTRIBUTES*)calloc(1, sizeof(ATTRIBUTES)) ;
-    new_ref->attr->type = TRICK_DOUBLE ;
-    new_ref->attr->units = strdup("s") ;
-    new_ref->attr->size = sizeof(double) ;
-    return new_ref;
-}
-
-REF2* Trick::VariableServerThread::make_error_ref(std::string in_name) {
-    REF2* new_ref;
-    new_ref = (REF2*)calloc(1, sizeof(REF2));
-    new_ref->reference = strdup(in_name.c_str()) ;
-    new_ref->units = NULL ;
-    new_ref->address = (char *)&bad_ref_int ;
-    new_ref->attr = (ATTRIBUTES*)calloc(1, sizeof(ATTRIBUTES)) ;
-    new_ref->attr->type = TRICK_NUMBER_OF_TYPES ;
-    new_ref->attr->units = (char *)"--" ;
-    new_ref->attr->size = sizeof(int) ;
-    return new_ref;
-}
-
-Trick::VariableReference* Trick::VariableServerThread::create_var_reference(std::string in_name) {
-    REF2 * new_ref ;
-
-    // Time var is treated specially
-    if ( in_name.compare("time") == 0 ) {
-        new_ref = make_time_ref() ;
-    } else {
-        // otherwise ref_attributes takes care of the hard part
-        new_ref = ref_attributes(in_name.c_str()) ;
-    }
-
-    // Check error cases
-    if ( new_ref == NULL ) {
-        message_publish(MSG_ERROR, "Variable Server could not find variable %s.\n", in_name.c_str());
-        new_ref = make_error_ref(in_name);
-    } else if ( new_ref->attr ) {
-        if ( new_ref->attr->type == TRICK_STRUCTURED ) {
-            message_publish(MSG_ERROR, "Variable Server: var_add cant add \"%s\" because its a composite variable.\n", in_name.c_str());
-            // Replace the REF2 object we got from ref_attributes with an error-ref.
-            free(new_ref);
-            new_ref = make_error_ref(in_name);
-            // set the address of the data to the do_not_resolve address.  We won't retry resolving the name
-            new_ref->address = (char *)&do_not_resolve_bad_ref_int ;
-        } else if ( new_ref->attr->type == TRICK_STL ) {
-            message_publish(MSG_ERROR, "Variable Server: var_add cant add \"%s\" because its an STL variable.\n", in_name.c_str());
-            // Replace the REF2 object we got from ref_attributes with an error-ref.
-            free(new_ref);
-            new_ref = make_error_ref(in_name);
-            // set the address of the data to the do_not_resolve address.  We won't retry resolving the name
-            new_ref->address = (char *)&do_not_resolve_bad_ref_int ;
-        }
-    } else {
-        message_publish(MSG_ERROR, "Variable Server: BAD MOJO - Missing ATTRIBUTES.");
-        new_ref = make_error_ref(in_name);
-    }
-
-    // Actually constructs the variable reference in the success case
-    return new VariableReference(new_ref) ;
-}
-
-int Trick::VariableServerThread::var_add(std::string in_name) {
-    VariableReference * new_var = create_var_reference(in_name);
-    vars.push_back(new_var) ;
-
-    return(0) ;
-}
-
-int Trick::VariableServerThread::var_add(std::string var_name, std::string units_name) {
-    var_add(var_name) ;
-    var_units(var_name, units_name) ;
-    return(0) ;
-}
-
-// Helper function for var_send_once
-std::vector<std::string> split (const std::string& str, const char delim) {
-    std::stringstream ss(str);
-    std::string s;
-    std::vector<std::string> ret;
-    while (std::getline(ss, s, delim)) {
-        ret.push_back(s);
-    }
-    return ret;
-}
-
-int Trick::VariableServerThread::var_send_once(std::string in_name, int num_vars) {
-    std::vector<std::string> var_names = split(in_name, ',');
-
-    if (var_names.size() != num_vars) {
-        message_publish(MSG_ERROR, "Number of variables sent to var_send_once (%d) does not match num_vars (%d).\n", var_names.size(), num_vars);
-        return -1;
-    }
-
-    std::vector<VariableReference *> given_vars;
-    for (auto& varName : var_names) {
-        given_vars.push_back(create_var_reference(varName));
-    }
-    copy_sim_data(given_vars, false);
-    write_data(given_vars);
-
-    return(0) ;
-}
-
-
-int Trick::VariableServerThread::var_remove(std::string in_name) {
-
-    unsigned int ii ;
-    for ( ii = 0 ; ii < vars.size() ; ii++ ) {
-        std::string var_name = vars[ii]->ref->reference;
-        if ( ! var_name.compare(in_name) ) {
-            delete vars[ii];
-            vars.erase(vars.begin() + ii) ;
-            break ;
-        }
-    }
-
-    return(0) ;
-
-}
-
-int Trick::VariableServerThread::var_units(std::string var_name, std::string units_name) {
-    for ( VariableReference* variable : vars ) {
-        if ( std::string(variable->ref->reference).compare(var_name) ) {
-            continue;
-        }
-
-        if (!units_name.compare("xx")) {
-            units_name = variable->ref->attr->units;
-        }
-
-        auto publish = [](MESSAGE_TYPE type, const std::string& message) {
-            std::ostringstream oss;
-            oss << "Variable Server: " << message << std::endl;
-            message_publish(type, oss.str().c_str());
-        };
-        /* if unitless ('--') then do not convert to udunits*/
-        if(units_name.compare("--")){
-            std::string new_units = map_trick_units_to_udunits(units_name) ;
-            if ( units_name.compare(new_units) ) {
-                std::ostringstream oss;
-                oss << "[" << var_name << "] old-style units converted from ["
-                    << units_name << "] to [" << new_units << "]";
-                publish(MSG_WARNING, oss.str());
-            }
-
-            auto publishError = [&](const std::string& units) {
-                std::ostringstream oss;
-                oss << "units error for [" << var_name << "] [" << units << "]";
-                publish(MSG_ERROR, oss.str());
-            };
-
-            ut_unit * from = ut_parse(Trick::UdUnits::get_u_system(), variable->ref->attr->units, UT_ASCII) ;
-            if ( !from ) {
-                publishError(variable->ref->attr->units);
-                ut_free(from) ;
-                return -1 ;
-            }
-
-            ut_unit * to = ut_parse(Trick::UdUnits::get_u_system(), new_units.c_str(), UT_ASCII) ;
-            if ( !to ) {
-                publishError(new_units);
-                ut_free(from) ;
-                ut_free(to) ;
-                return -1 ;
-            }
-
-            cv_converter * conversion_factor = ut_get_converter(from, to) ;
-            ut_free(from) ;
-            ut_free(to) ;
-            if ( !conversion_factor ) {
-                std::ostringstream oss;
-                oss << "[" << var_name << "] cannot convert units from [" << variable->ref->attr->units
-                    << "] to [" << new_units << "]";
-                publish(MSG_ERROR, oss.str());
-                return -1 ;
-            }
-
-            cv_free(variable->conversion_factor);
-            variable->conversion_factor = conversion_factor ;
-            free(variable->ref->units);
-            variable->ref->units = strdup(new_units.c_str());
-        }
-    }
-    return(0) ;
-}
-
-int Trick::VariableServerThread::var_exists(std::string in_name) {
-
-    char buf1[5] ;
-    bool error = false ;
-
-    unsigned int msg_type ;
-    REF2* var_ref = ref_attributes(in_name.c_str());
-
-    if ( var_ref == (REF2*)NULL ) {
-        error = true;
-    }
-
-    if (binary_data) {
-        /* send binary 1 or 0 */
-        msg_type = VS_VAR_EXISTS ;
-        memcpy(buf1, &msg_type , sizeof(msg_type)) ;
-
-        buf1[4] = (error==false);
-
-        if (debug >= 2) {
-            message_publish(MSG_DEBUG, "%p tag=<%s> var_server sending 1 binary byte\n", &connection, connection.client_tag);
-        }
-        tc_write(&connection, (char *) buf1, 5);
-    } else {
-        /* send ascii "1" or "0" */
-        snprintf(buf1, sizeof(buf1), "%d\t%d\n", VS_VAR_EXISTS, (error==false));
-        if (debug >= 2) {
-            message_publish(MSG_DEBUG, "%p tag=<%s> var_server sending:\n%s\n", &connection, connection.client_tag, buf1) ;
-        }
-        tc_write(&connection, (char *) buf1, strlen(buf1));
-    }
-
-    return(0) ;
-}
-
-int Trick::VariableServerThread::var_clear() {
-    while( !vars.empty() ) {
-        delete vars.back();
-        vars.pop_back();
-    }
-    return(0) ;
-}
-
-
-int Trick::VariableServerThread::var_send() {
-    copy_sim_data();
-    write_data();
-    return(0) ;
-}
-
-int Trick::VariableServerThread::var_cycle(double in_rate) {
-    update_rate = in_rate ;
-    cycle_tics = (long long)(update_rate * exec_get_time_tic_value()) ;
-    return(0) ;
-}
-
-bool Trick::VariableServerThread::get_pause() {
-    return pause_cmd ;
-}
-
-void Trick::VariableServerThread::set_pause( bool on_off) {
-    pause_cmd = on_off ;
-}
-
-int Trick::VariableServerThread::var_exit() {
-    exit_cmd = true ;
-    return(0) ;
-}
-
-int Trick::VariableServerThread::var_validate_address(bool on_off) {
-    validate_address = on_off ;
-    return(0) ;
-}
-
-int Trick::VariableServerThread::var_debug(int level) {
-    debug = level ;
-    return(0) ;
-}
-
-int Trick::VariableServerThread::var_ascii() {
-    binary_data = 0 ;
-    return(0) ;
-}
-
-int Trick::VariableServerThread::var_binary() {
-    binary_data = 1 ;
-    return(0) ;
-}
-
-int Trick::VariableServerThread::var_binary_nonames() {
-    binary_data = 1 ;
-    binary_data_nonames = 1 ;
-    return(0) ;
-}
-
-int Trick::VariableServerThread::var_set_copy_mode(int mode) {
-    if ( mode >= VS_COPY_ASYNC and mode <= VS_COPY_TOP_OF_FRAME ) {
-        copy_mode = (VS_COPY_MODE)mode ;
-        if ( copy_mode == VS_COPY_SCHEDULED ) {
-            long long sim_time_tics ;
-            sim_time_tics = exec_get_time_tics() ;
-            // round the next call time to a multiple of the cycle
-            sim_time_tics -= sim_time_tics % cycle_tics ;
-            next_tics = sim_time_tics + cycle_tics ;
-
-            sim_time_tics = exec_get_freeze_time_tics() ;
-            // round the next call time to a multiple of the cycle
-            sim_time_tics -= sim_time_tics % cycle_tics ;
-            freeze_next_tics = sim_time_tics + cycle_tics ;
-
-        } else {
-            next_tics = TRICK_MAX_LONG_LONG ;
-        }
-        return 0 ;
-    }
-    return -1 ;
-}
-
-int Trick::VariableServerThread::var_set_write_mode(int mode) {
-    if ( mode >= VS_WRITE_ASYNC and mode <= VS_WRITE_WHEN_COPIED ) {
-        write_mode = (VS_WRITE_MODE)mode ;
-        return 0 ;
-    }
-    return -1 ;
-}
-
-int Trick::VariableServerThread::var_sync(int mode) {
-
-    switch (mode) {
-        case 1:
-            var_set_copy_mode(VS_COPY_SCHEDULED) ;
-            var_set_write_mode(VS_WRITE_ASYNC) ;
-            break ;
-        case 2:
-            var_set_copy_mode(VS_COPY_SCHEDULED) ;
-            var_set_write_mode(VS_WRITE_WHEN_COPIED) ;
-            break ;
-        case 0:
-        default:
-            var_set_copy_mode(VS_COPY_ASYNC) ;
-            var_set_write_mode(VS_WRITE_ASYNC) ;
-            break ;
-    }
-
-    return 0 ;
-}
-
-int Trick::VariableServerThread::var_set_frame_multiple(unsigned int mult) {
-    frame_multiple = mult ;
-    return 0 ;
-}
-
-int Trick::VariableServerThread::var_set_frame_offset(unsigned int offset) {
-    frame_offset = offset ;
-    return 0 ;
-}
-
-int Trick::VariableServerThread::var_set_freeze_frame_multiple(unsigned int mult) {
-    freeze_frame_multiple = mult ;
-    return 0 ;
-}
-
-int Trick::VariableServerThread::var_set_freeze_frame_offset(unsigned int offset) {
-    freeze_frame_offset = offset ;
-    return 0 ;
-}
-
-int Trick::VariableServerThread::var_byteswap(bool on_off) {
-    byteswap = on_off ;
-    return(0) ;
-}
-
-bool Trick::VariableServerThread::get_send_stdio() {
-    return send_stdio ;
-}
-
-int Trick::VariableServerThread::set_send_stdio(bool on_off) {
-    send_stdio = on_off ;
-    return(0) ;
-}
-
-int Trick::VariableServerThread::var_signal() {
-
-    message_publish(MSG_ERROR,"Variable Server Error: var_signal is currently not implemented.\n") ;
-
-    return(0) ;
-}
-
-int Trick::VariableServerThread::var_multicast(bool on_off) {
-
-    multicast = on_off ;
-
-    message_publish(MSG_ERROR, "Variable Server Error: var_multicast is currently not implemented.\n") ;
-
-    return(0) ;
-}
-
-int Trick::VariableServerThread::send_list_size() {
-    char buf1[12] ;
-    unsigned int msg_type ;
-    int var_count;
-
-    // send number of variables
-    var_count = vars.size();
-    if (binary_data) {
-        // send in the binary message header format:
-        // <message_indicator><message_size><number_of_variables>
-        msg_type = VS_LIST_SIZE;
-        memcpy(buf1, &msg_type , sizeof(msg_type)) ;
-
-        memset(&(buf1[4]), 0, sizeof(int)); // message size = 0
-        memcpy(&(buf1[8]), &var_count, sizeof(var_count));
-
-        if (debug >= 2) {
-            message_publish(MSG_DEBUG, "%p tag=<%s> var_server sending %d event variables\n", &connection, connection.client_tag, var_count);
-        }
-        tc_write(&connection, (char *) buf1, 12);
-    } else {
-        // ascii
-        snprintf(buf1, sizeof(buf1), "%d\t%d\n", VS_LIST_SIZE, var_count);
-        if (debug >= 2) {
-            message_publish(MSG_DEBUG, "%p tag=<%s> var_server sending number of event variables:\n%s\n", &connection, connection.client_tag, buf1) ;
-        }
-        tc_write(&connection, (char *) buf1, strlen(buf1));
-    }
-
-    return 0 ;
-}
-
-int Trick::VariableServerThread::transmit_file(std::string sie_file) {
-    const unsigned int packet_size = 4095 ;
-    FILE * fp ;
-    unsigned int file_size ;
-    unsigned int current_size = 0 ;
-    unsigned int bytes_read ;
-    char buffer[packet_size] ;
-    int ret ;
-
-    if (debug >= 2) {
-        message_publish(MSG_DEBUG,"%p tag=<%s> var_server opening %s.\n", &connection, connection.client_tag, sie_file.c_str()) ;
-    }
-
-    if ((fp = fopen(sie_file.c_str() , "r")) == NULL ) {
-        message_publish(MSG_ERROR,"Variable Server Error: Cannot open %s.\n", sie_file.c_str()) ;
-        snprintf(buffer, sizeof(buffer), "%d\t-1\n", VS_SIE_RESOURCE) ;
-        tc_write(&connection , buffer , strlen(buffer)) ;
-        return(-1) ;
-    }
-
-    fseek(fp , 0L, SEEK_END) ;
-    file_size = ftell(fp) ;
-
-    snprintf(buffer, sizeof(buffer), "%d\t%u\n" , VS_SIE_RESOURCE, file_size) ;
-    tc_write(&connection , buffer , strlen(buffer)) ;
-    rewind(fp) ;
-
-    // Switch to blocking writes since this could be a large transfer.
-    if (tc_blockio(&connection, TC_COMM_BLOCKIO)) {
-        message_publish(MSG_DEBUG,"Variable Server Error: Failed to set TCDevice to TC_COMM_BLOCKIO.\n");
-    }
-
-    while ( current_size < file_size ) {
-        bytes_read = fread(buffer , 1 , packet_size , fp) ;
-        ret = tc_write(&connection , buffer , bytes_read ) ;
-        if (ret != (int)bytes_read) {
-            message_publish(MSG_ERROR,"Variable Server Error: Failed to send SIE file.\n", sie_file.c_str()) ;
-            return(-1);
-        }
-        current_size += bytes_read ;
-    }
-
-    // Switch back to non-blocking writes.
-    if (tc_blockio(&connection, TC_COMM_NOBLOCKIO)) {
-        message_publish(MSG_ERROR,"Variable Server Error: Failed to set TCDevice to TC_COMM_NOBLOCKIO.\n");
-        return(-1);
-    }
-
-    return(0) ;
-}
-
-int Trick::VariableServerThread::send_file(std::string file_name) {
-    return transmit_file(file_name) ;
-}
-
-int Trick::VariableServerThread::send_sie_resource() {
-    sie_append_runtime_objs() ;
-    return transmit_file(std::string(sie_get_runtime_sie_dir()) + "/S_sie.resource") ;
-}
-
-int Trick::VariableServerThread::send_sie_class() {
-    sie_class_attr_map_print_xml() ;
-    return transmit_file(std::string(sie_get_runtime_sie_dir()) + "/" + "S_sie_class.xml") ;
-}
-
-int Trick::VariableServerThread::send_sie_enum() {
-    sie_enum_attr_map_print_xml() ;
-    return transmit_file(std::string(sie_get_runtime_sie_dir()) + "/" + "S_sie_enum.xml") ;
-}
-
-int Trick::VariableServerThread::send_sie_top_level_objects() {
-    sie_top_level_objects_print_xml() ;
-    return transmit_file(std::string(sie_get_runtime_sie_dir()) + "/" + "S_sie_top_level_objects.xml") ;
-}

trick_source/sim_services/VariableServer/VariableServerThread_connect.cpp

@@ -1,9 +0,0 @@
-
-#include "trick/VariableServer.hh"
-#include "trick/release.h"
-
-void Trick::VariableServerThread::wait_for_accept() {
-    while ( connection_accepted == false ) {
-        RELEASE() ;
-    }
-}

trick_source/sim_services/VariableServer/VariableServerThread_copy_sim_data.cpp

@@ -1,105 +0,0 @@
-
-#include <iostream>
-#include <string.h>
-
-#include "trick/VariableServer.hh"
-#include "trick/memorymanager_c_intf.h"
-#include "trick/exec_proto.h"
-
-int Trick::VariableServerThread::copy_sim_data() {
-    return copy_sim_data(vars, true);
-}
-
-int Trick::VariableServerThread::copy_sim_data(std::vector<VariableReference *> given_vars, bool cyclical) {
-
-    if (given_vars.size() == 0) {
-        return 0;
-    }
-
-    if ( pthread_mutex_trylock(&copy_mutex) == 0 ) {
-
-        // Get the simulation time we start this copy
-        if (cyclical) {
-            time = (double)exec_get_time_tics() / exec_get_time_tic_value() ;
-        }
-
-        for (auto curr_var : given_vars ) {
-
-            if (curr_var->ref->address == &bad_ref_int) {
-                REF2 *new_ref = ref_attributes(curr_var->ref->reference);
-                if (new_ref != NULL) {
-                    curr_var->ref = new_ref;
-                }
-            }
-
-            // if there's a pointer somewhere in the address path, follow it in case pointer changed
-            if ( curr_var->ref->pointer_present == 1 ) {
-                curr_var->address = follow_address_path(curr_var->ref) ;
-                if (curr_var->address == NULL) {
-                    std::string save_name(curr_var->ref->reference) ;
-                    free(curr_var->ref) ;
-                    curr_var->ref = make_error_ref(save_name) ;
-                    curr_var->address = curr_var->ref->address ;
-                } else if ( validate_address ) {
-                    // The address is not NULL.
-                    // If validate_address is on, check the memory manager if the address falls into
-                    // any of the memory blocks it knows of.  Don't do this if we have a std::string or
-                    // wstring type, or we already are pointing to a bad ref.
-                    if ( (curr_var->string_type != TRICK_STRING) and
-                            (curr_var->string_type != TRICK_WSTRING) and
-                            (curr_var->ref->address != &bad_ref_int) and
-                            (get_alloc_info_of(curr_var->address) == NULL) ) {
-                        std::string save_name(curr_var->ref->reference) ;
-                        free(curr_var->ref) ;
-                        curr_var->ref = make_error_ref(save_name) ;
-                        curr_var->address = curr_var->ref->address ;
-                    }
-                } else {
-                    curr_var->ref->address = curr_var->address ;
-                }
-
-            }
-
-            // if this variable is a string we need to get the raw character string out of it.
-            if (( curr_var->string_type == TRICK_STRING ) && !curr_var->need_deref) {
-                std::string * str_ptr = (std::string *)curr_var->ref->address ;
-                curr_var->address = (void *)(str_ptr->c_str()) ;
-            }
-
-            // if this variable itself is a pointer, dereference it
-            if ( curr_var->need_deref) {
-                curr_var->address = *(void**)curr_var->ref->address ;
-            }
-
-            // handle c++ string and char*
-            if ( curr_var->string_type == TRICK_STRING ) {
-                if (curr_var->address == NULL) {
-                    curr_var->size = 0 ;
-                } else {
-                    curr_var->size = strlen((char*)curr_var->address) + 1 ;
-                }
-            }
-            // handle c++ wstring and wchar_t*
-            if ( curr_var->string_type == TRICK_WSTRING ) {
-                if (curr_var->address == NULL) {
-                    curr_var->size = 0 ;
-                } else {
-                    curr_var->size = wcslen((wchar_t *)curr_var->address) * sizeof(wchar_t);
-                }
-            }
-            if(curr_var->address != NULL) {
-                memcpy( curr_var->buffer_in , curr_var->address , curr_var->size ) ;
-            }
-        }
-
-        // Indicate that sim data has been written and is now ready in the buffer_in's of the vars variable list.
-        if (cyclical) {
-            var_data_staged = true;
-            packets_copied++ ;
-        }
-
-        pthread_mutex_unlock(&copy_mutex) ;
-    }
-
-    return 0;
-}

trick_source/sim_services/VariableServer/VariableServerThread_create_socket.cpp

@@ -1,44 +0,0 @@
-
-#include <stdlib.h>
-#include "trick/VariableServerThread.hh"
-#include "trick/tc_proto.h"
-#include "trick/message_proto.h"
-#include "trick/message_type.h"
-
-int Trick::VariableServerThread::create_udp_socket(const char * address, unsigned short in_port) {
-    listen_dev = &connection ;
-    tc_init_with_connection_info(&connection, AF_INET, SOCK_DGRAM, address, in_port) ;
-    message_publish(MSG_INFO, "Created udp variable server %s:%d\n", listen_dev->hostname, listen_dev->port) ;
-    tc_blockio( &connection , TC_COMM_NOBLOCKIO ) ;
-    conn_type = UDP ;
-    return 0 ;
-}
-
-int Trick::VariableServerThread::create_mcast_socket(const char * mcast_address, const char * address, unsigned short in_port) {
-    int ret ;
-    if ( mcast_address == NULL || mcast_address[0] == '\0' ) {
-        message_publish(MSG_ERROR, "Multicast address must be defined.\n") ;
-        return -1 ;
-    }
-    create_udp_socket(address, in_port) ;
-
-    conn_type = MCAST ;
-
-    struct ip_mreq mreq;
-    mreq.imr_multiaddr.s_addr = inet_addr(mcast_address);
-    mreq.imr_interface.s_addr = htonl(INADDR_ANY);
-    ret = setsockopt(connection.socket, IPPROTO_IP, IP_ADD_MEMBERSHIP, &mreq, sizeof(mreq)) ;
-    if ( ret < 0 ) {
-        perror("ip_add_membership") ;
-        return ret ;
-    }
-
-    memset(&connection.remoteServAddr, 0, sizeof(struct sockaddr_in));
-    connection.remoteServAddr.sin_family = AF_INET;
-    connection.remoteServAddr.sin_addr.s_addr = inet_addr(mcast_address);
-    connection.remoteServAddr.sin_port = htons(in_port);
-
-    message_publish(MSG_INFO, "Multicast variable server output %s:%d\n", mcast_address, listen_dev->port) ;
-    return 0 ;
-
-}

trick_source/sim_services/VariableServer/VariableServerThread_loop.cpp

@@ -22,141 +22,81 @@ void exit_var_thread(void *in_vst) ;
 
 void * Trick::VariableServerThread::thread_body() {
 
-    int ii , jj;
-    int msg_len;
-    int ret;
-    int nbytes = -1;
-    char *last_newline ;
-    unsigned int size ;
-    socklen_t sock_size ;
-
     //  We need to make the thread to VariableServerThread map before we accept the connection.
     //  Otherwise we have a race where this thread is unknown to the variable server and the
     //  client gets confirmation that the connection is ready for communication.
     vs->add_vst( pthread_self() , this ) ;
 
-    if ( listen_dev->socket_type == SOCK_STREAM ) {
-        tc_accept(listen_dev, &connection);
-        tc_blockio(&connection, TC_COMM_ALL_OR_NOTHING);
+    // Accept client connection
+    int accept_status = accept(listener, &connection);
+    if (accept_status != 0) {
+        // TODO: Use a real error handler
+        std::cout << "Accept failed, variable server session exiting" << std::endl;
+        vs->delete_vst(pthread_self());
+
+        // Tell main thread that we failed to initialize
+        pthread_mutex_lock(&connection_status_mutex);
+        connection_status = CONNECTION_FAIL;
+        pthread_cond_signal(&connection_status_cv);
+        pthread_mutex_unlock(&connection_status_mutex);
+
+        pthread_exit(NULL);
     }
-    connection_accepted = true ;
+
+    connection.setBlockMode(TC_COMM_ALL_OR_NOTHING);
+
+    // Create session
+    session = new VariableServerSession(&connection);
+    vs->add_session( pthread_self(), session );
+
+    // Tell main that we are ready
+    pthread_mutex_lock(&connection_status_mutex);
+    connection_status = CONNECTION_SUCCESS;
+    pthread_cond_signal(&connection_status_cv);
+    pthread_mutex_unlock(&connection_status_mutex);
+
 
     pthread_setcanceltype(PTHREAD_CANCEL_ASYNCHRONOUS, NULL) ;
-    pthread_cleanup_push(exit_var_thread, (void *) this);
-
-    /* Save off the host and port information of the source port.  We want to ignore messages from
-       this port if we are a multicast socket */
-    struct sockaddr_in self_s_in ;
-    int s_in_size =  sizeof(self_s_in) ;
-    if ( conn_type == MCAST ) {
-        getsockname( connection.socket , (struct sockaddr *)&self_s_in, (socklen_t *)&s_in_size) ;
-        if ( self_s_in.sin_addr.s_addr == 0 ) {
-            char hname[80];
-            struct hostent *ip_host;
-            gethostname(hname, (size_t) 80);
-            ip_host = gethostbyname(hname);
-            memcpy(&(self_s_in.sin_addr.s_addr), ip_host->h_addr, (size_t) ip_host->h_length);
-        }
-    }
+    pthread_cleanup_push(exit_var_thread, (void *) this) ;
 
     // if log is set on for variable server (e.g., in input file), turn log on for each client
     if (vs->get_log()) {
-        log = true ;
+        session->set_log_on();
     }
 
     try {
         while (1) {
-
             // Pause here if we are in a restart condition
             pthread_mutex_lock(&restart_pause) ;
 
-            /* Check the length of the message on the socket */
-            nbytes = recvfrom( connection.socket, incoming_msg, MAX_CMD_LEN, MSG_PEEK, NULL, NULL ) ;
-            if (nbytes == 0 ) {
-                break ;
-            }
+            // Look for a message from the client
+            // Parse and execute if one is availible
+            session->handleMessage();
 
-            if (nbytes != -1) { // -1 means socket is nonblocking and no data to read
-                /* find the last newline that is present on the socket */
-                incoming_msg[nbytes] = '\0' ;
-                last_newline = rindex( incoming_msg , '\n') ;
-
-                /* if there is a newline then there is a complete command on the socket */
-                if ( last_newline != NULL ) {
-                    /* only remove up to (and including) the last newline on the socket */
-                    size = last_newline - incoming_msg + 1;
-                    if ( conn_type == UDP ) {
-                        // Save the remote host information, that is where we are going to send replies.
-                        sock_size = sizeof(connection.remoteServAddr) ;
-                        nbytes = recvfrom( connection.socket, incoming_msg, size, 0 ,
-                         (struct sockaddr *)&connection.remoteServAddr, &sock_size ) ;
-                    } else if ( conn_type == MCAST ) {
-                        // Save the remove host information for test against ourself.
-                        struct sockaddr_in s_in ;
-                        sock_size = sizeof(s_in) ;
-                        nbytes = recvfrom( connection.socket, incoming_msg, size, 0 ,
-                         (struct sockaddr *)&s_in, &sock_size ) ;
-                        // If this message is from us, then ignore it.
-                        if ( s_in.sin_addr.s_addr == self_s_in.sin_addr.s_addr and s_in.sin_port == self_s_in.sin_port) {
-                            nbytes = 0 ;
-                        }
-                    } else {
-                        // We know where we are sending information, no need to save it.
-                        nbytes = recvfrom( connection.socket, incoming_msg, size, 0 , NULL, NULL ) ;
-                    }
-                } else {
-                    nbytes = 0 ;
-                }
-            }
-
-            if ( nbytes > 0 ) {
-
-                msg_len = nbytes ;
-                if (debug >= 3) {
-                    message_publish(MSG_DEBUG, "%p tag=<%s> var_server received bytes = msg_len = %d\n", &connection, connection.client_tag, nbytes);
-                }
-
-                incoming_msg[msg_len] = '\0' ;
-
-                if (vs->get_info_msg() || (debug >= 1)) {
-                    message_publish(MSG_DEBUG, "%p tag=<%s> var_server received: %s", &connection, connection.client_tag, incoming_msg) ;
-                }
-                if (log) {
-                    message_publish(MSG_PLAYBACK, "tag=<%s> time=%f %s", connection.client_tag, exec_get_sim_time(), incoming_msg) ;
-                }
-
-                for( ii = 0 , jj = 0 ; ii <= msg_len ; ii++ ) {
-                    if ( incoming_msg[ii] != '\r' ) {
-                        stripped_msg[jj++] = incoming_msg[ii] ;
-                    }
-                }
-
-                ip_parse(stripped_msg); /* returns 0 if no parsing error */
-
-            }
-
-            /* break out of loop if exit command found */
-            if (exit_cmd == true) {
+            // Check to see if exit is necessary
+            if (session->exit_cmd == true) {
                 break;
             }
 
-            if ( copy_mode == VS_COPY_ASYNC ) {
-                copy_sim_data() ;
+            // Copy data out of sim if async mode
+            if ( session->get_copy_mode() == VS_COPY_ASYNC ) {
+                session->copy_sim_data() ;
             }
+    
+            bool should_write_async = (session->get_write_mode() == VS_WRITE_ASYNC) || 
+                                        ( session->get_copy_mode() == VS_COPY_ASYNC && (session->get_write_mode() == VS_WRITE_WHEN_COPIED)) || 
+                                        (! is_real_time());
 
-            if ( (write_mode == VS_WRITE_ASYNC) or
-                 ((copy_mode == VS_COPY_ASYNC) and (write_mode == VS_WRITE_WHEN_COPIED)) or
-                 (! is_real_time()) ) {
-                if ( !pause_cmd ) {
-                    ret = write_data() ;
-                    if ( ret < 0 ) {
-                        break ;
-                    }
+            // Write data out to connection if async mode and not paused
+            if ( should_write_async && !session->get_pause()) {
+                int ret = session->write_data() ;
+                if ( ret < 0 ) {
+                    break ;
                 }
             }
             pthread_mutex_unlock(&restart_pause) ;
 
-            usleep((unsigned int) (update_rate * 1000000));
+            usleep((unsigned int) (session->get_update_rate() * 1000000));
         }
     } catch (Trick::ExecutiveException & ex ) {
         message_publish(MSG_ERROR, "\nVARIABLE SERVER COMMANDED exec_terminate\n  ROUTINE: %s\n  DIAGNOSTIC: %s\n" ,
@@ -192,7 +132,7 @@ void * Trick::VariableServerThread::thread_body() {
     }
 
     if (debug >= 3) {
-        message_publish(MSG_DEBUG, "%p tag=<%s> var_server receive loop exiting\n", &connection, connection.client_tag);
+        message_publish(MSG_DEBUG, "%p tag=<%s> var_server receive loop exiting\n", &connection, connection.get_client_tag().c_str());
     }
 
     pthread_cleanup_pop(1);

trick_source/sim_services/VariableServer/VariableServerThread_restart.cpp

@@ -1,45 +0,0 @@
-
-#include <stdlib.h>
-#include "trick/VariableServerThread.hh"
-
-void Trick::VariableServerThread::preload_checkpoint() {
-
-    // Stop variable server processing at the top of the processing loop.
-    pthread_mutex_lock(&restart_pause);
-
-    // Let the thread complete any data copying it has to do
-    // and then suspend data copying until the checkpoint is reloaded.
-    pthread_mutex_lock(&copy_mutex);
-
-    // Save the pause state of this thread.
-    saved_pause_cmd = pause_cmd;
-
-    // Disallow data writing.
-    pause_cmd = true ;
-
-    // Temporarily "disconnect" the variable references from Trick Managed Memory
-    // by tagging each as a "bad reference".
-    std::vector <VariableReference *>::iterator it ;
-    for (it = vars.begin(); it != vars.end() ; it++) {
-        (*it)->ref->address = (char*)&bad_ref_int;
-        (*it)->ref->attr = new ATTRIBUTES() ;
-        (*it)->ref->attr->type = TRICK_NUMBER_OF_TYPES ;
-        (*it)->ref->attr->units = (char *)"--" ;
-        (*it)->ref->attr->size = sizeof(int) ;
-    }
-
-    // Allow data copying to continue.
-    pthread_mutex_unlock(&copy_mutex);
-
-}
-
-void Trick::VariableServerThread::restart() {
-    // Set the pause state of this thread back to its "pre-checkpoint reload" state.
-    pause_cmd = saved_pause_cmd ;
-
-    // Restart the variable server processing.
-    pthread_mutex_unlock(&restart_pause);
-
-}
-
-

trick_source/sim_services/VariableServer/VariableServerThread_write_data.cpp

@@ -1,322 +0,0 @@
-/*
-PURPOSE:      (Allows clients to get and set Trick parameters)
-PROGRAMMERS: (((Alex Lin) (NASA) (8/06) (--)))
-*/
-
-#include <iostream>
-#include <pthread.h>
-#include "trick/VariableServer.hh"
-#include "trick/parameter_types.h"
-#include "trick/bitfield_proto.h"
-#include "trick/trick_byteswap.h"
-#include "trick/tc_proto.h"
-#include "trick/message_proto.h"
-#include "trick/message_type.h"
-
-
-extern "C" {
-    void *trick_bswap_buffer(void *out, void *in, ATTRIBUTES * attr, int tofrom) ;
-}
-
-#define MAX_MSG_LEN    8192
-
-
-int Trick::VariableServerThread::write_binary_data( int Start, char *buf1, const std::vector<VariableReference *>& given_vars, VS_MESSAGE_TYPE message_type) {
-    int i;
-    int ret ;
-    int HeaderSize, MessageSize;
-    int NumVariablesProcessed;
-    unsigned int msg_type , offset, len ;
-    unsigned int size ;
-    unsigned int swap_int ;
-    char * address = 0 ;
-    char* param_name;
-
-    /* start the offset 4 bytes into the message, we'll subtract the sizeof offset at the end */
-    offset = sizeof(msg_type) + sizeof(offset) ;
-
-    if (byteswap) {
-        /* Swap message type bytes */
-        msg_type = trick_byteswap_int((int)message_type) ;
-    } else {
-        msg_type = message_type;
-    }
-    memcpy(buf1, &msg_type , sizeof(msg_type)) ;
-    HeaderSize = sizeof(msg_type);
-
-    offset += sizeof(unsigned int) ;
-    HeaderSize += sizeof(unsigned int);
-
-    for (i = Start; i < (int)given_vars.size() ; i++) {
-
-        // data to send was copied to buffer in copy_sim_data
-        address = (char *)given_vars[i]->buffer_out;
-        size = given_vars[i]->size ;
-
-        param_name = given_vars[i]->ref->reference;
-        len = strlen(param_name)  ;
-        // when var_binary_nonames, do not put the variable names into the message to be sent
-        if (binary_data_nonames) {
-            MessageSize = sizeof(int) + sizeof(size) + size ;
-        } else {
-            MessageSize = sizeof(len) + len + sizeof(int) + sizeof(size) + size ;
-        }
-
-        /* make sure this message will fit in a packet by itself */
-        if ( (HeaderSize + MessageSize) > MAX_MSG_LEN ) {
-            message_publish(MSG_WARNING, "%p Variable Server buffer[%d] too small (need %d) for symbol %s, SKIPPING IT.\n",
-                            &connection, MAX_MSG_LEN,
-                            (int)(HeaderSize + MessageSize),
-                            given_vars[i]->ref->reference );
-            continue;
-        }
-
-        if ( (offset + MessageSize) < MAX_MSG_LEN ) {
-            if (byteswap) {
-                if (!binary_data_nonames) {
-                    swap_int = trick_byteswap_int((int)len) ;
-                    memcpy(&buf1[offset] , &swap_int , sizeof(len)) ;
-                    offset += sizeof(len) ;
-
-                    memcpy(&buf1[offset] , param_name , (size_t)len) ;
-                    offset += len ;
-                }
-
-                swap_int = trick_byteswap_int(given_vars[i]->ref->attr->type) ;
-                memcpy(&buf1[offset] , &swap_int , sizeof(int)) ;
-                offset += sizeof(int) ;
-
-                swap_int = trick_byteswap_int((int)size) ;
-                memcpy(&buf1[offset] , &swap_int , sizeof(size)) ;
-                offset += sizeof(size) ;
-
-                trick_bswap_single_parameter(&buf1[offset], address, given_vars[i]->ref->attr, 1);
-                offset += size ;
-            }
-            else {
-                int temp_i ;
-                unsigned int temp_ui ;
-
-                if (!binary_data_nonames) {
-                    memcpy(&buf1[offset] , &len , sizeof(len)) ;
-                    offset += sizeof(len) ;
-
-                    memcpy(&buf1[offset] , param_name , (size_t)len) ;
-                    offset += len ;
-                }
-
-                memcpy(&buf1[offset] , &given_vars[i]->ref->attr->type , sizeof(int)) ;
-                offset += sizeof(int) ;
-
-                memcpy(&buf1[offset] , &size , sizeof(size)) ;
-                offset += sizeof(size) ;
-
-                switch ( given_vars[i]->ref->attr->type ) {
-                    case TRICK_BITFIELD:
-                        temp_i = GET_BITFIELD(address , given_vars[i]->ref->attr->size ,
-                          given_vars[i]->ref->attr->index[0].start, given_vars[i]->ref->attr->index[0].size) ;
-                        memcpy(&buf1[offset] , &temp_i , (size_t)size) ;
-                    break ;
-                    case TRICK_UNSIGNED_BITFIELD:
-                        temp_ui = GET_UNSIGNED_BITFIELD(address , given_vars[i]->ref->attr->size ,
-                                given_vars[i]->ref->attr->index[0].start, given_vars[i]->ref->attr->index[0].size) ;
-                        memcpy(&buf1[offset] , &temp_ui , (size_t)size) ;
-                    break ;
-                    case TRICK_NUMBER_OF_TYPES:
-                        // TRICK_NUMBER_OF_TYPES is an error case
-                        temp_i = 0 ;
-                        memcpy(&buf1[offset] , &temp_i , (size_t)size) ;
-                    break ;
-                    default:
-                        memcpy(&buf1[offset] , address , (size_t)size) ;
-                    break ;
-                }
-                offset += size ;
-            }
-        }
-        else {
-            /* indicate that we're over the maximum size */
-            if (debug >= 2) {
-                message_publish(MSG_DEBUG, "%p tag=<%s> var_server buffer[%d] too small (need %d), sending multiple binary packets.\n",
-                        &connection, connection.client_tag, MAX_MSG_LEN,
-                        (int)(offset + MessageSize) );
-            }
-            break ;
-        }
-    }
-
-    /* adjust the header with the correct information reflecting what has been accomplished */
-    NumVariablesProcessed = i - Start;
-
-    offset -= sizeof(offset) ;
-    if (byteswap) {
-        swap_int = trick_byteswap_int((int)offset) ;
-        memcpy(buf1 + sizeof(msg_type) , &swap_int , sizeof(offset)) ;
-
-        swap_int = trick_byteswap_int( NumVariablesProcessed ) ;
-        memcpy( buf1 + sizeof(msg_type) + sizeof(offset), &swap_int , sizeof(swap_int)) ;
-    }
-    else {
-        memcpy(buf1 + sizeof(msg_type) , &offset , sizeof(offset)) ;
-        memcpy( buf1 + sizeof(msg_type) + sizeof(offset), &NumVariablesProcessed , sizeof( NumVariablesProcessed )) ;
-    }
-
-    if (debug >= 2) {
-        message_publish(MSG_DEBUG, "%p tag=<%s> var_server sending %u binary bytes containing %d variables.\n", &connection,
-                connection.client_tag, (unsigned int)(offset + sizeof(offset)), NumVariablesProcessed);
-    }
-
-    len = offset + sizeof(msg_type) ;
-    ret = tc_write(&connection, (char *) buf1, len);
-    if ( ret != (int)len ) {
-        return(-1) ;
-    }
-
-    /* return the index to the next symbol to send or V->num_vars if all done */
-    return i;
-}
-
-int Trick::VariableServerThread::write_ascii_data(char * dest_buf, size_t dest_buf_size, const std::vector<VariableReference *>& given_vars, VS_MESSAGE_TYPE message_type ) {
-
-    snprintf(dest_buf, dest_buf_size, "%d\t", message_type) ;
-
-    for (unsigned long i = 0; i < given_vars.size(); i++) {
-        char curr_buf[MAX_MSG_LEN];
-        int ret = vs_format_ascii( given_vars[i] , curr_buf, sizeof(curr_buf));
-
-        if (ret < 0) {
-            message_publish(MSG_WARNING, "%p Variable Server string buffer[%d] too small for symbol %s, TRUNCATED IT.\n",
-                            &connection, MAX_MSG_LEN, given_vars[i]->ref->reference );
-        }
-
-        /* make sure this message will fit in a packet by itself */
-        if( strlen( curr_buf ) + 2 > MAX_MSG_LEN ) {
-            message_publish(MSG_WARNING, "%p Variable Server buffer[%d] too small for symbol %s, TRUNCATED IT.\n",
-                            &connection, MAX_MSG_LEN, given_vars[i]->ref->reference );
-            curr_buf[MAX_MSG_LEN - 1] = '\0';
-        }
-
-        int len = strlen(dest_buf) ;
-
-        /* make sure there is space for the next tab or next newline and null */
-        if( len + strlen( curr_buf ) + 2 > MAX_MSG_LEN ) {
-            // If there isn't, send incomplete message
-            if (debug >= 2) {
-                message_publish(MSG_DEBUG, "%p tag=<%s> var_server sending %d ascii bytes:\n%s\n",
-                                &connection, connection.client_tag, (int)strlen(dest_buf), dest_buf) ;
-            }
-
-            ret = tc_write(&connection, (char *) dest_buf, len);
-            if ( ret != len ) {
-                return(-1) ;
-            }
-            dest_buf[0] = '\0';
-        }
-
-        strcat(dest_buf, curr_buf);
-        strcat(dest_buf, "\t");
-    }
-
-    int len = strlen(dest_buf) ;
-
-    if ( len > 0 ) {
-        dest_buf[ strlen(dest_buf) - 1 ] = '\n';
-
-        if (debug >= 2) {
-            message_publish(MSG_DEBUG, "%p tag=<%s> var_server sending %d ascii bytes:\n%s\n",
-                            &connection, connection.client_tag, (int)strlen(dest_buf), dest_buf) ;
-        }
-        int ret = tc_write(&connection, (char *) dest_buf, (int)strlen(dest_buf));
-        if ( ret != (int)strlen(dest_buf) ) {
-            return(-1) ;
-        }
-    }
-
-    return 0;
-}
-
-int Trick::VariableServerThread::write_data() {
-
-    int ret;
-    unsigned int i ;
-    char buf1[ MAX_MSG_LEN ];
-    int len ;
-
-    // do not send anything when there are no variables!
-    if ( vars.size() == 0 or packets_copied == 0 ) {
-        return 0;
-    }
-
-    /* Acquire sole access to vars[ii]->buffer_in. */
-    if ( var_data_staged and pthread_mutex_trylock(&copy_mutex) == 0 ) {
-        unsigned int ii;
-        void * temp_p;
-        // Swap buffer_in and buffer_out for each vars[ii].
-        for ( ii = 0 ; ii < vars.size() ; ii++ ) {
-                          temp_p = vars[ii]->buffer_in;
-            vars[ii]->buffer_in  = vars[ii]->buffer_out;
-            vars[ii]->buffer_out = temp_p;
-        }
-        var_data_staged = false;
-
-        /* Relinquish sole access to vars[ii]->buffer_in. */
-        pthread_mutex_unlock(&copy_mutex) ;
-
-        if (binary_data) {
-            int index = 0;            
-
-            do {
-                ret = write_binary_data( index, buf1, vars, VS_VAR_LIST );
-                if ( ret >= 0 ) {
-                    index = ret ;
-                } else {
-                    return(-1) ;
-                }
-            } while( index < (int)vars.size() );
-
-            return 0;
-
-        } else { /* ascii mode */
-            return write_ascii_data(buf1, sizeof(buf1), vars, VS_VAR_LIST );
-        }
-    }
-}
-
-int Trick::VariableServerThread::write_data(std::vector<VariableReference *> given_vars) { 
-    // do not send anything when there are no variables!
-    if ( given_vars.size() == 0) {
-        return(0);
-    }
-
-    /* Acquire sole access to vars[ii]->buffer_in. */
-    if ( pthread_mutex_trylock(&copy_mutex) == 0 ) {
-        // Swap buffer_in and buffer_out for each vars[ii].
-        for (int i = 0 ; i < given_vars.size() ; i++ ) {
-            void *temp_p              = given_vars[i]->buffer_in;
-            given_vars[i]->buffer_in  = given_vars[i]->buffer_out;
-            given_vars[i]->buffer_out = temp_p;
-        }
-        /* Relinquish sole access to vars[ii]->buffer_in. */
-        pthread_mutex_unlock(&copy_mutex) ;
-
-        char buf1[ MAX_MSG_LEN ];
-
-        if (binary_data) {
-            int index = 0;
-
-            do {
-                int ret = write_binary_data( index, buf1, given_vars, VS_SEND_ONCE );
-                if ( ret >= 0 ) {
-                    index = ret ;
-                } else {
-                    return(-1) ;
-                }
-            } while( index < (int)given_vars.size() );
-
-            return 0;
-
-        } else { /* ascii mode */
-            return write_ascii_data(buf1, sizeof(buf1), given_vars, VS_SEND_ONCE);
-        }
-    }
-}

trick_source/sim_services/VariableServer/VariableServerThread_write_stdio.cpp

@@ -1,13 +0,0 @@
-
-#include "trick/VariableServer.hh"
-#include "trick/variable_server_message_types.h"
-#include "trick/tc_proto.h"
-
-int Trick::VariableServerThread::write_stdio(int stream, std::string text) {
-
-    char header[16] ;
-    snprintf(header, sizeof(header), "%-2d %1d %8d\n" , VS_STDIO, stream , (int)text.length()) ;
-    tc_write(&connection , (char *) header , strlen(header)) ;
-    tc_write(&connection , (char *) text.c_str() , text.length()) ;
-    return 0 ;
-}

trick_source/sim_services/VariableServer/VariableServer_copy_data_freeze.cpp

@@ -6,10 +6,10 @@
 
 int Trick::VariableServer::copy_data_freeze() {
 
-    std::map < pthread_t , VariableServerThread * >::iterator it ;
+    std::map < pthread_t , VariableServerSession * >::iterator it ;
 
     pthread_mutex_lock(&map_mutex) ;
-    for ( it = var_server_threads.begin() ; it != var_server_threads.end() ; it++ ) {
+    for ( it = var_server_sessions.begin() ; it != var_server_sessions.end() ; it++ ) {
         (*it).second->copy_data_freeze() ;
     }
     pthread_mutex_unlock(&map_mutex) ;

trick_source/sim_services/VariableServer/VariableServer_copy_data_freeze_scheduled.cpp

@@ -8,17 +8,16 @@
 int Trick::VariableServer::copy_data_freeze_scheduled() {
 
     long long next_call_tics ;
-    VariableServerThread * vst ;
-    std::map < pthread_t , VariableServerThread * >::iterator it ;
+    std::map < pthread_t , VariableServerSession * >::iterator it ;
 
     next_call_tics = TRICK_MAX_LONG_LONG ;
 
     pthread_mutex_lock(&map_mutex) ;
-    for ( it = var_server_threads.begin() ; it != var_server_threads.end() ; it++ ) {
-        vst = (*it).second ;
-        vst->copy_data_freeze_scheduled(copy_data_freeze_job->next_tics) ;
-        if ( vst->get_freeze_next_tics() < next_call_tics ) {
-            next_call_tics = vst->get_freeze_next_tics() ;
+    for ( it = var_server_sessions.begin() ; it != var_server_sessions.end() ; it++ ) {
+        VariableServerSession * session = (*it).second ;
+        session->copy_data_freeze_scheduled(copy_data_freeze_job->next_tics) ;
+        if ( session->get_freeze_next_tics() < next_call_tics ) {
+            next_call_tics = session->get_freeze_next_tics() ;
         }
     }
     pthread_mutex_unlock(&map_mutex) ;

trick_source/sim_services/VariableServer/VariableServer_copy_data_scheduled.cpp

@@ -8,17 +8,16 @@
 int Trick::VariableServer::copy_data_scheduled() {
 
     long long next_call_tics ;
-    VariableServerThread * vst ;
-    std::map < pthread_t , VariableServerThread * >::iterator it ;
+    std::map < pthread_t , VariableServerSession * >::iterator it ;
 
     next_call_tics = TRICK_MAX_LONG_LONG ;
 
     pthread_mutex_lock(&map_mutex) ;
-    for ( it = var_server_threads.begin() ; it != var_server_threads.end() ; it++ ) {
-        vst = (*it).second ;
-        vst->copy_data_scheduled(copy_data_job->next_tics) ;
-        if ( vst->get_next_tics() < next_call_tics ) {
-            next_call_tics = vst->get_next_tics() ;
+    for ( it = var_server_sessions.begin() ; it != var_server_sessions.end() ; it++ ) {
+        auto session = (*it).second ;
+        session->copy_data_scheduled(copy_data_job->next_tics) ;
+        if ( session->get_next_tics() < next_call_tics ) {
+            next_call_tics = session->get_next_tics() ;
         }
     }
     pthread_mutex_unlock(&map_mutex) ;

trick_source/sim_services/VariableServer/VariableServer_copy_data_top.cpp

@@ -6,10 +6,10 @@
 
 int Trick::VariableServer::copy_data_top() {
 
-    std::map < pthread_t , VariableServerThread * >::iterator it ;
+    std::map < pthread_t , VariableServerSession * >::iterator it ;
 
     pthread_mutex_lock(&map_mutex) ;
-    for ( it = var_server_threads.begin() ; it != var_server_threads.end() ; it++ ) {
+    for ( it = var_server_sessions.begin() ; it != var_server_sessions.end() ; it++ ) {
         (*it).second->copy_data_top() ;
     }
     pthread_mutex_unlock(&map_mutex) ;

trick_source/sim_services/VariableServer/VariableServer_freeze_init.cpp

@@ -10,17 +10,17 @@
 int Trick::VariableServer::freeze_init() {
 
     long long next_call_tics ;
-    VariableServerThread * vst ;
-    std::map < pthread_t , VariableServerThread * >::iterator it ;
+    VariableServerSession * session ;
+    std::map < pthread_t , VariableServerSession * >::iterator it ;
 
     next_call_tics = TRICK_MAX_LONG_LONG ;
 
     pthread_mutex_lock(&map_mutex) ;
-    for ( it = var_server_threads.begin() ; it != var_server_threads.end() ; it++ ) {
-        vst = (*it).second ;
-        vst->freeze_init() ;
-        if ( vst->get_freeze_next_tics() < next_call_tics ) {
-            next_call_tics = vst->get_freeze_next_tics() ;
+    for ( it = var_server_sessions.begin() ; it != var_server_sessions.end() ; it++ ) {
+        session = (*it).second ;
+        session->freeze_init() ;
+        if ( session->get_freeze_next_tics() < next_call_tics ) {
+            next_call_tics = session->get_freeze_next_tics() ;
         }
     }
     pthread_mutex_unlock(&map_mutex) ;

trick_source/sim_services/VariableServer/VariableServer_get_next_freeze_call_time.cpp

@@ -6,18 +6,18 @@
 
 int Trick::VariableServer::get_next_freeze_call_time() {
 
-    std::map < pthread_t , VariableServerThread * >::iterator it ;
-    VariableServerThread * vst ;
+    std::map < pthread_t , VariableServerSession * >::iterator it ;
+    VariableServerSession * session ;
 
     long long next_call_tics ;
 
     next_call_tics = TRICK_MAX_LONG_LONG ;
 
     pthread_mutex_lock(&map_mutex) ;
-    for ( it = var_server_threads.begin() ; it != var_server_threads.end() ; it++ ) {
-        vst = (*it).second ;
-        if ( vst->get_freeze_next_tics() < next_call_tics ) {
-            next_call_tics = vst->get_freeze_next_tics() ;
+    for ( it = var_server_sessions.begin() ; it != var_server_sessions.end() ; it++ ) {
+        session = (*it).second ;
+        if ( session->get_freeze_next_tics() < next_call_tics ) {
+            next_call_tics = session->get_freeze_next_tics() ;
         }
     }
     pthread_mutex_unlock(&map_mutex) ;

trick_source/sim_services/VariableServer/VariableServer_get_next_sync_call_time.cpp

@@ -6,18 +6,18 @@
 
 int Trick::VariableServer::get_next_sync_call_time() {
 
-    std::map < pthread_t , VariableServerThread * >::iterator it ;
-    VariableServerThread * vst ;
+    std::map < pthread_t , VariableServerSession * >::iterator it ;
+    VariableServerSession * session ;
 
     long long next_call_tics ;
 
     next_call_tics = TRICK_MAX_LONG_LONG ;
 
     pthread_mutex_lock(&map_mutex) ;
-    for ( it = var_server_threads.begin() ; it != var_server_threads.end() ; it++ ) {
-        vst = (*it).second ;
-        if ( vst->get_next_tics() < next_call_tics ) {
-            next_call_tics = vst->get_next_tics() ;
+    for ( it = var_server_sessions.begin() ; it != var_server_sessions.end() ; it++ ) {
+        session = (*it).second ;
+        if ( session->get_next_tics() < next_call_tics ) {
+            next_call_tics = session->get_next_tics() ;
         }
     }
     pthread_mutex_unlock(&map_mutex) ;

trick_source/sim_services/VariableServer/VariableServer_get_var_server_port.cpp

@@ -2,41 +2,42 @@
 #include <stdio.h>
 #include "trick/VariableServer.hh"
 
+
 int Trick::VariableServer::create_tcp_socket(const char * address, unsigned short in_port ) {
     Trick::VariableServerListenThread * new_listen_thread = new Trick::VariableServerListenThread ;
     new_listen_thread->create_tcp_socket(address, in_port) ;
     new_listen_thread->copy_cpus(listen_thread.get_cpus()) ;
     new_listen_thread->create_thread() ;
-    additional_listen_threads[new_listen_thread->get_pthread_id()] = new_listen_thread ;
+    // additional_listen_threads[new_listen_thread->get_pthread_id()] = new_listen_thread ;
 
     return 0 ;
 }
 
 int Trick::VariableServer::create_udp_socket(const char * address, unsigned short in_port ) {
-    int ret ;
-    Trick::VariableServerThread * vst ;
-    vst = new Trick::VariableServerThread(NULL) ;
-    ret = vst->create_udp_socket(address, in_port) ;
-    if ( ret == 0 ) {
-        vst->copy_cpus(listen_thread.get_cpus()) ;
-        vst->create_thread() ;
-    }
+    // int ret ;
+    // Trick::VariableServerThread * vst ;
+    // vst = new Trick::VariableServerThread(NULL) ;
+    // ret = vst->create_udp_socket(address, in_port) ;
+    // if ( ret == 0 ) {
+    //     vst->copy_cpus(listen_thread.get_cpus()) ;
+    //     vst->create_thread() ;
+    // }
     //vst->var_debug(3) ;
 
-    return ret ;
+    return 0 ;
 }
 
 int Trick::VariableServer::create_multicast_socket(const char * mcast_address, const char * address, unsigned short in_port ) {
-    int ret ;
-    Trick::VariableServerThread * vst ;
-    vst = new Trick::VariableServerThread(NULL) ;
-    ret = vst->create_mcast_socket(mcast_address, address, in_port) ;
-    if ( ret == 0 ) {
-        vst->copy_cpus(listen_thread.get_cpus()) ;
-        vst->create_thread() ;
-    }
+    // int ret ;
+    // Trick::VariableServerThread * vst ;
+    // vst = new Trick::VariableServerThread(NULL) ;
+    // ret = vst->create_mcast_socket(mcast_address, address, in_port) ;
+    // if ( ret == 0 ) {
+    //     vst->copy_cpus(listen_thread.get_cpus()) ;
+    //     vst->create_thread() ;
+    // }
     //vst->var_debug(3) ;
 
-    return ret ;
+    return 0 ;
 }
 

trick_source/sim_services/VariableServer/VariableServer_init.cpp

@@ -4,11 +4,9 @@
 
 int Trick::VariableServer::init() {
 
-    int ret ;
-
     /* start up a thread for the input processor variable server */
     if ( enabled ) {
-        ret = listen_thread.check_and_move_listen_device() ;
+        int ret = listen_thread.check_and_move_listen_device() ;
         if ( ret != 0 ) {
             return ret ;
         }

trick_source/sim_services/VariableServer/VariableServer_restart.cpp

@@ -9,10 +9,10 @@ int Trick::VariableServer::restart() {
     if ( listen_thread.get_pthread_id() == 0 ) {
         listen_thread.create_thread() ;
     }
-    std::map < pthread_t , VariableServerListenThread * >::iterator it ;
-    for( it = additional_listen_threads.begin() ; it != additional_listen_threads.end() ; it++ ) {
-        (*it).second->restart() ;
-    }
+    // std::map < pthread_t , VariableServerListenThread * >::iterator it ;
+    // for( it = additional_listen_threads.begin() ; it != additional_listen_threads.end() ; it++ ) {
+    //     (*it).second->restart() ;
+    // }
     return 0 ;
 }
 

trick_source/sim_services/VariableServer/VariableServer_shutdown.cpp

@@ -4,13 +4,19 @@
 int Trick::VariableServer::shutdown() {
     listen_thread.cancel_thread() ;
     std::map < pthread_t , VariableServerThread * >::iterator it ;
+
     pthread_mutex_lock(&map_mutex) ;
+    std::vector<pthread_t> ids;
     for ( it = var_server_threads.begin() ; it != var_server_threads.end() ; it++ ) {
         (*it).second->cancel_thread() ;
+        ids.push_back((*it).first);
         // cancelling causes each var_server_thread map element to be erased by the exit_var_thread function
     }
     pthread_mutex_unlock(&map_mutex) ;
 
+    for (pthread_t id : ids) {
+        pthread_join(id, NULL);
+    }
     return 0 ;
 }
 

trick_source/sim_services/VariableServer/exit_var_thread.cpp

@@ -6,8 +6,9 @@ void exit_var_thread(void *in_vst) {
     Trick::VariableServerThread * vst = (Trick::VariableServerThread *) in_vst ;
     Trick::VariableServer * vs = vst->get_vs() ;
 
-    tc_disconnect(&vst->get_connection());
+    // tc_disconnect(&vst->get_connection());
 
+    vs->delete_session(vst->get_pthread_id());
     // Tell the variable server that this thread is exiting.
     vs->delete_vst(vst->get_pthread_id()) ;
 

trick_source/sim_services/VariableServer/test/.gitignore

@@ -0,0 +1,4 @@
+lcov_html/*
+*.o
+*_test
+*.info

trick_source/sim_services/VariableServer/test/Makefile

@@ -0,0 +1,87 @@
+
+#SYNOPSIS:
+#
+#   make [all]  - makes everything.
+#   make TARGET - makes the given target.
+#   make clean  - removes all files generated by make.
+
+include $(dir $(lastword $(MAKEFILE_LIST)))../../../../share/trick/makefiles/Makefile.common
+
+# Replace -isystem with -I so ICG doesn't skip Trick headers
+TRICK_SYSTEM_CXXFLAGS := $(subst -isystem,-I,$(TRICK_SYSTEM_CXXFLAGS))
+
+# Flags passed to the preprocessor.
+TRICK_CXXFLAGS += -I$(GTEST_HOME)/include -I$(TRICK_HOME)/include -g -Wall -Wextra -Wno-sign-compare -std=c++11 ${TRICK_SYSTEM_CXXFLAGS} ${TRICK_TEST_FLAGS}
+TRICK_LIBS =  -L${TRICK_LIB_DIR} -ltrick_mm -ltrick_units -ltrick_comm -ltrick_pyip -ltrick -ltrick_mm -ltrick_units -ltrick_comm -ltrick_pyip -ltrick -ltrick_var_binary_parser -ltrick_connection_handlers -ltrick_comm 
+TRICK_EXEC_LINK_LIBS += -L${GTEST_HOME}/lib64 -L${GTEST_HOME}/lib -lgtest -lgtest_main -lpthread					  
+
+# All tests produced by this Makefile.  Remember to add new tests you
+# created to the list.
+
+VARIABLE_REFERENCE_TESTS = VariableReference_test \
+		VariableReference_writeValueAscii_test \
+		VariableReference_writeValueBinary_test
+
+VARIABLE_SESSION_TESTS = VariableServerSession_test
+
+TESTS = $(VARIABLE_REFERENCE_TESTS) $(VARIABLE_SESSION_TESTS)
+
+TEST_OBJS = $(addprefix $(OBJ_DIR)/, $(addsuffix .o, $(TESTS)))
+
+TO_ICG = VariableReference_test \
+		TestConnection
+
+ICG_OBJS = $(addprefix $(OBJ_DIR)/io_, $(addsuffix .o, $(TO_ICG)))
+
+OBJ_DIR = obj
+
+print:
+	echo $(ICG_OBJS)
+
+# House-keeping build targets.
+
+all : test
+
+test: $(TESTS)
+	for TEST in $(TESTS) ; do \
+		./$$TEST --gtest_output=xml:${TRICK_HOME}/trick_test/$$TEST.xml ; \
+	done
+
+$(OBJ_DIR):
+	mkdir $(OBJ_DIR)
+
+$(TEST_OBJS): $(OBJ_DIR)/%.o: %.cc $(OBJ_DIR)
+	$(TRICK_CXX) $(TRICK_CXXFLAGS) -c $< -o $@ -L${TRICK_HOME}/lib_${TRICK_HOST_CPU} $(TRICK_LIBS) $(TRICK_EXEC_LINK_LIBS)
+
+$(ICG_OBJS): $(OBJ_DIR)/io_%.o : %.hh $(OBJ_DIR)
+	${TRICK_HOME}/bin/trick-ICG -sim_services -o ./io_src $(TRICK_CXXFLAGS) $<
+	$(TRICK_CXX) $(TRICK_CXXFLAGS) -c io_src/io_$*.cpp -o $@ -L${TRICK_HOME}/lib_${TRICK_HOST_CPU} $(TRICK_LIBS) $(TRICK_EXEC_LINK_LIBS)
+
+$(VARIABLE_REFERENCE_TESTS): %: $(OBJ_DIR)/%.o $(OBJ_DIR)/io_VariableReference_test.o
+	$(TRICK_CXX) $(TRICK_SYSTEM_LDFLAGS) -o $@ $^ -L${TRICK_HOME}/lib_${TRICK_HOST_CPU} $(TRICK_LIBS) $(TRICK_EXEC_LINK_LIBS)
+
+$(VARIABLE_SESSION_TESTS): %: $(OBJ_DIR)/%.o $(OBJ_DIR)/io_TestConnection.o
+	$(TRICK_CXX) $(TRICK_SYSTEM_LDFLAGS) -o $@ $^ -L${TRICK_HOME}/lib_${TRICK_HOST_CPU} $(TRICK_LIBS) $(TRICK_EXEC_LINK_LIBS)
+
+code-coverage: test
+	# Give rid of any old code-coverage HTML we may have.
+	rm -rf lcov_html
+	# Gather coverage information about the src code.
+	lcov --capture \
+	--directory ../object_${TRICK_HOST_CPU} \
+	--base-directory ../ \
+	--output-file src_coverage.info
+	# Filter out information about directories that we don't care about.
+	lcov --remove src_coverage.info '/Applications/*' '/usr/include/*' '/Library/*' \
+	--output-file VariableServer_code_coverage.info
+	# Generate HTML
+	genhtml VariableServer_code_coverage.info \
+	--output-directory lcov_html
+	# Clean up
+	# rm *.info
+	lcov --list VariableServer_code_coverage.info
+
+clean :
+	rm -f $(TESTS)
+	rm -f *.gcno *.gcda
+	rm -rf io_src xml obj

trick_source/sim_services/VariableServer/test/TestConnection.hh

@@ -0,0 +1,80 @@
+#ifndef TEST_CONNECTION_HH
+#define TEST_CONNECTION_HH
+
+#include "trick/ClientConnection.hh"
+#include <iostream>
+#include <vector>
+#include <queue>
+#include <string.h>
+
+class TestConnection : public Trick::ClientConnection {
+    public: 
+        ~TestConnection () {
+            for (char * message : binary_messages_written) {
+                free (message);
+            }
+        }
+    
+        int initialize() {
+            valid = true;
+        }
+
+        int write (const std::string& message) {
+            if (!valid)
+                return -1;
+
+            ascii_messages_written.emplace_back(message);
+            return 0;
+        }
+
+        int write (char * message, int size) {
+            if (!valid)
+                return -1;
+
+            char * msg_copy = (char *) malloc(size+1);
+            memcpy(msg_copy, message, size+1);
+            binary_messages_written.push_back(msg_copy);
+
+            return 0;
+        }
+
+        std::string read  (int max_len = MAX_CMD_LEN) {
+            if (queued_messages.empty()) {
+                return "";
+            }
+
+            std::string ret = queued_messages.front();
+            queued_messages.pop();
+            return ret;
+        }
+
+        int disconnect () {
+            valid = false;
+            return 0;
+        }
+
+        std::string get_client_tag () {
+            return client_tag;
+        }
+
+        int set_client_tag(std::string tag) {
+            client_tag = tag;
+        }
+
+        int setBlockMode (int mode) {
+            return 0;
+        }
+
+
+        std::queue <std::string> queued_messages;
+        std::vector <std::string> ascii_messages_written;
+        std::vector <char *> binary_messages_written;
+        
+
+        std::string client_tag;
+        bool valid = true;
+
+};
+
+
+#endif

trick_source/sim_services/VariableServer/test/VariableReference_test.cc

@@ -0,0 +1,512 @@
+#include "VariableReference_test.hh"
+
+TEST_F(VariableReference_test, getName) {
+    // ARRANGE
+    // Create a variable to make a reference for
+    int test_int = 5;
+    (void) memmgr->declare_extern_var(&test_int, "int test_int");
+    Trick::VariableReference ref("test_int");
+
+    // ACT
+    // ASSERT
+    EXPECT_EQ(strcmp(ref.getName(), "test_int"), 0);
+}
+
+TEST_F(VariableReference_test, validateAddress) {
+    // ARRANGE
+    // Create a variable to make a reference for
+    int test_a = 5;
+    (void) memmgr->declare_extern_var(&test_a, "int test_a");
+    Trick::VariableReference ref("test_a");
+    
+    float test_b = 5.0;
+    (void) memmgr->declare_extern_var(&test_b, "float test_b");
+    Trick::VariableReference ref_broken("test_b");
+    memmgr->delete_var("test_b");
+
+    float test_c = 5.0;
+    (void) memmgr->declare_extern_var(&test_c, "float test_c");
+    Trick::VariableReference ref_tagged("test_c");
+    ref_tagged.tagAsInvalid();
+
+    // ACT
+    // ASSERT
+    EXPECT_EQ(ref.validate(), true);
+    EXPECT_EQ(ref_broken.validate(), false);
+    // A reference already tagged as invalid is considered ok by this check
+    EXPECT_EQ(ref_tagged.validate(), true);
+}
+
+
+TEST_F(VariableReference_test, stageValue_set) {
+    // ARRANGE
+    // Create a variable to make a reference for
+    int test_a = 5;
+    (void) memmgr->declare_extern_var(&test_a, "int test_a");
+    Trick::VariableReference ref("test_a");
+
+    // ACT
+    ref.stageValue();
+
+    // ASSERT
+    EXPECT_EQ(ref.isStaged(), true);
+    EXPECT_EQ(ref.isWriteReady(), false);
+}
+
+TEST_F(VariableReference_test, prepareForWrite_set) {
+    // ARRANGE
+    // Create a variable to make a reference for
+    int test_a = 5;
+    (void) memmgr->declare_extern_var(&test_a, "int test_a");
+    Trick::VariableReference ref("test_a");
+
+    // ACT
+    ref.stageValue();
+    ref.prepareForWrite();
+
+    // ASSERT
+    EXPECT_EQ(ref.isStaged(), false);
+    EXPECT_EQ(ref.isWriteReady(), true);
+}
+
+TEST_F(VariableReference_test, prepareForWrite_fails_if_not_staged) {
+    // ARRANGE
+    // Create a variable to make a reference for
+    int test_a = 5;
+    (void) memmgr->declare_extern_var(&test_a, "int test_a");
+    Trick::VariableReference ref("test_a");
+
+    // ACT
+    ref.prepareForWrite();
+
+    // ASSERT
+    EXPECT_EQ(ref.isStaged(), false);
+    EXPECT_EQ(ref.isWriteReady(), false);
+}
+
+TEST_F(VariableReference_test, writeValueAscii_fails_if_not_write_ready) {
+    // ARRANGE
+    // Create a variable to make a reference for
+    int test_a = 5;
+    (void) memmgr->declare_extern_var(&test_a, "int test_a");
+    Trick::VariableReference ref("test_a");
+    std::stringstream ss;
+
+    // ACT
+    // ASSERT
+    EXPECT_EQ(ref.writeValueAscii(ss), -1);
+}
+
+TEST_F(VariableReference_test, var_does_not_exist) {
+    // ARRANGE
+    Trick::VariableReference ref("no_such_var");
+    std::stringstream ss;
+
+    // ACT
+    ref.stageValue();
+    ref.prepareForWrite();
+    ref.writeValueAscii(ss);
+
+    // ASSERT
+    EXPECT_EQ(ref.getType(), TRICK_NUMBER_OF_TYPES);
+    EXPECT_EQ(ss.str(), "BAD_REF");
+}
+
+TEST_F(VariableReference_test, stl_var) {
+    // ARRANGE
+    TestObject my_test;
+    my_test.vec.push_back(5);
+    (void) memmgr->declare_extern_var(&my_test, "TestObject my_test");
+
+    Trick::VariableReference ref("my_test.vec");
+    std::stringstream ss;
+
+    // ACT
+    ref.stageValue();
+    ref.prepareForWrite();
+    ref.writeValueAscii(ss);
+
+    // ASSERT
+    EXPECT_EQ(ref.isWriteReady(), true);
+    EXPECT_EQ(ref.getType(), TRICK_NUMBER_OF_TYPES);
+    EXPECT_EQ(ss.str(), "BAD_REF");
+}
+
+TEST_F(VariableReference_test, structured_var) {
+    // ARRANGE
+    TestObject my_test;
+    my_test.obj.a = 5;
+    (void) memmgr->declare_extern_var(&my_test, "TestObject my_test");
+
+    Trick::VariableReference ref("my_test.obj");
+    std::stringstream ss;
+
+    // ACT
+    ref.stageValue();
+    ref.prepareForWrite();
+    ref.writeValueAscii(ss);
+
+    // ASSERT
+    EXPECT_EQ(ref.isWriteReady(), true);
+    EXPECT_EQ(ref.getType(), TRICK_NUMBER_OF_TYPES);
+    EXPECT_EQ(ss.str(), "BAD_REF");
+}
+
+TEST_F(VariableReference_test, printWithoutUnits) {
+    // ARRANGE
+    // Create a variable to make a reference for
+    TestObject obj;
+    obj.length = 5000;
+    (void) memmgr->declare_extern_var(&obj, "TestObject obj");
+    Trick::VariableReference ref("obj.length");
+    std::stringstream ss;
+
+    // ACT
+    EXPECT_STREQ(ref.getBaseUnits(), "m");
+
+    // ASSERT
+    // Doesn't actually print with units unless set
+    ref.stageValue();
+    ref.prepareForWrite();
+    ref.writeValueAscii(ss);
+    EXPECT_EQ(ss.str(), "5000");
+}
+
+TEST_F(VariableReference_test, setUnits) {
+    // ARRANGE
+    // Create a variable to make a reference for
+    TestObject obj;
+    obj.length = 5000;
+    (void) memmgr->declare_extern_var(&obj, "TestObject obj");
+    Trick::VariableReference ref("obj.length");
+    std::stringstream ss;
+
+    // ACT
+    ref.setRequestedUnits("km");
+
+    // ASSERT
+    ref.stageValue();
+    ref.prepareForWrite();
+    ref.writeValueAscii(ss);
+    EXPECT_EQ(ss.str(), "5 {km}");
+}
+
+TEST_F(VariableReference_test, setUnitsTwice) {
+    // ARRANGE
+    // Create a variable to make a reference for
+    TestObject obj;
+    obj.length = 5000;
+    (void) memmgr->declare_extern_var(&obj, "TestObject obj");
+    Trick::VariableReference ref("obj.length");
+    std::stringstream ss;
+
+    // ACT
+    ref.setRequestedUnits("km");
+
+    // ASSERT
+    ref.stageValue();
+    ref.prepareForWrite();
+    ref.writeValueAscii(ss);
+    EXPECT_EQ(ss.str(), "5 {km}");
+    ss.str("");
+
+    // ACT
+    ref.setRequestedUnits("mm");
+
+    // ASSERT
+    ref.stageValue();
+    ref.prepareForWrite();
+    ref.writeValueAscii(ss);
+    EXPECT_EQ(ss.str(), "5000000 {mm}");
+}
+
+
+TEST_F(VariableReference_test, setUnitsBadFromUnits) {
+    // ARRANGE
+    // Create a variable to make a reference for
+    TestObject obj;
+    obj.error_units = 50;
+    (void) memmgr->declare_extern_var(&obj, "TestObject obj");
+    Trick::VariableReference ref("obj.error_units");
+    std::stringstream ss;
+
+    // ACT
+    ref.setRequestedUnits("mm");
+
+    // ASSERT
+    ref.stageValue();
+    ref.prepareForWrite();
+    ref.writeValueAscii(ss);
+    EXPECT_EQ(ss.str(), "50");
+}
+
+TEST_F(VariableReference_test, setUnitsBadToUnits) {
+    // ARRANGE
+    // Create a variable to make a reference for
+    TestObject obj;
+    obj.a = 0.5;
+    (void) memmgr->declare_extern_var(&obj, "TestObject obj");
+    Trick::VariableReference ref("obj.a");
+    std::stringstream ss;
+
+    // ACT
+    ref.setRequestedUnits("asldfjks");
+
+    // ASSERT
+    ref.stageValue();
+    ref.prepareForWrite();
+    ref.writeValueAscii(ss);
+    EXPECT_EQ(ss.str(), "0.5");
+}
+
+TEST_F(VariableReference_test, setUnitsDouble) {
+    // ARRANGE
+    // Create a variable to make a reference for
+    TestObject obj;
+    obj.a = 0.5;
+    (void) memmgr->declare_extern_var(&obj, "TestObject obj");
+    Trick::VariableReference ref("obj.a");
+    std::stringstream ss;
+
+    // ACT
+    ref.setRequestedUnits("ms");
+
+    // ASSERT
+    ref.stageValue();
+    ref.prepareForWrite();
+    ref.writeValueAscii(ss);
+    EXPECT_EQ(ss.str(), "500 {ms}");
+}
+
+TEST_F(VariableReference_test, setUnitsLong) {
+    // ARRANGE
+    // Create a variable to make a reference for
+    TestObject obj;
+    obj.b = 1;
+    (void) memmgr->declare_extern_var(&obj, "TestObject obj");
+    Trick::VariableReference ref("obj.b");
+    std::stringstream ss;
+
+    // ACT
+    ref.setRequestedUnits("m");
+
+    // ASSERT
+    ref.stageValue();
+    ref.prepareForWrite();
+    ref.writeValueAscii(ss);
+    EXPECT_EQ(ss.str(), "1852 {m}");
+}
+
+TEST_F(VariableReference_test, setUnitsLongLong) {
+    // ARRANGE
+    // Create a variable to make a reference for
+    TestObject obj;
+    obj.c = 10000000;
+    (void) memmgr->declare_extern_var(&obj, "TestObject obj");
+    Trick::VariableReference ref("obj.c");
+    std::stringstream ss;
+
+    // ACT
+    ref.setRequestedUnits("m");
+
+    // ASSERT
+    ref.stageValue();
+    ref.prepareForWrite();
+    ref.writeValueAscii(ss);
+    EXPECT_EQ(ss.str(), "254000 {m}");
+}
+
+TEST_F(VariableReference_test, setUnitsUnsignedLong) {
+    // ARRANGE
+    // Create a variable to make a reference for
+    TestObject obj;
+    obj.d = 1;
+    (void) memmgr->declare_extern_var(&obj, "TestObject obj");
+    Trick::VariableReference ref("obj.d");
+    std::stringstream ss;
+
+    // ACT
+    ref.setRequestedUnits("mi");
+
+    // ASSERT
+    ref.stageValue();
+    ref.prepareForWrite();
+    ref.writeValueAscii(ss);
+    EXPECT_EQ(ss.str(), "5878625079535 {mi}");
+}
+
+TEST_F(VariableReference_test, setUnitsUnsignedLongLong) {
+    // ARRANGE
+    // Create a variable to make a reference for
+    TestObject obj;
+    obj.e = 1;
+    (void) memmgr->declare_extern_var(&obj, "TestObject obj");
+    Trick::VariableReference ref("obj.e");
+    std::stringstream ss;
+
+    // ACT
+    ref.setRequestedUnits("mm");
+
+    // ASSERT
+    ref.stageValue();
+    ref.prepareForWrite();
+    ref.writeValueAscii(ss);
+    EXPECT_EQ(ss.str(), "1609344 {mm}");
+}
+
+// Byteswap tests
+
+TEST_F(VariableReference_test, byteswap_chars) {
+    // ARRANGE
+    char in = 'a';
+    char out;
+
+    memmgr->declare_extern_var(&in, "char a");
+    Trick::VariableReference ref("a");
+
+    // ACT
+    Trick::VariableReference::byteswap_var(&out, &in, ref);
+
+    // ASSERT
+    EXPECT_EQ(in, 'a');
+    EXPECT_EQ(out, 'a');
+}
+
+TEST_F(VariableReference_test, byteswap_char_array) {
+    // ARRANGE
+    char in[7] = "Jackie";
+    char out[7];
+
+    memmgr->declare_extern_var(&in, "char a[7]");
+    Trick::VariableReference ref("a");
+
+    // ACT
+    Trick::VariableReference::byteswap_var(out, in, ref);
+
+    // ASSERT
+    for (int i = 0; i < 7; i++) {
+        EXPECT_EQ(out[i], in[i]);
+    }
+}
+
+// Pointers to the beginning of the variables
+bool check_that_val_is_byteswapped (char * expected, char * byteswap, int val_size) {
+    for (int i = 0; i < val_size; i++) {
+        if (expected[i] != byteswap[val_size-i-1]) return false;
+    }
+    return true;
+}
+
+TEST_F(VariableReference_test, byteswap_short) {
+    // ARRANGE
+    short in = 100; 
+    short out;      
+
+    memmgr->declare_extern_var(&in, "short a");
+    Trick::VariableReference ref("a");
+
+    // ACT
+    Trick::VariableReference::byteswap_var((char *)(&out),(char *)(&in), ref);
+
+    // ASSERT
+    EXPECT_TRUE(check_that_val_is_byteswapped((char *)(&out),(char *)(&in), sizeof(short)));
+}
+
+TEST_F(VariableReference_test, byteswap_int) {
+    // ARRANGE
+    int in = 123456;
+    int out;      
+
+    memmgr->declare_extern_var(&in, "int a");
+    Trick::VariableReference ref("a");
+
+    // ACT
+    Trick::VariableReference::byteswap_var((char *)(&out),(char *)(&in), ref);
+
+    // ASSERT
+    EXPECT_TRUE(check_that_val_is_byteswapped((char *)(&out),(char *)(&in), sizeof(int)));
+}
+
+TEST_F(VariableReference_test, byteswap_long) {
+    // ARRANGE
+    long in = 123456789; 
+    long out;
+
+    memmgr->declare_extern_var(&in, "long a");
+    Trick::VariableReference ref("a");
+
+    // ACT
+    Trick::VariableReference::byteswap_var((char *)(&out),(char *)(&in), ref);
+
+    // ASSERT
+    EXPECT_TRUE(check_that_val_is_byteswapped((char *)(&out),(char *)(&in), sizeof(long)));
+}
+
+TEST_F(VariableReference_test, byteswap_long_arr) {
+    // ARRANGE
+    long in[5] = {123456789, 123456780, __LONG_MAX__, -100000000, 0}; 
+    long out[5];
+
+    memmgr->declare_extern_var(&in, "long a[5]");
+    Trick::VariableReference ref("a");
+
+    // ACT
+    Trick::VariableReference::byteswap_var((char *)(out),(char *)(in), ref);
+
+    // ASSERT
+    for (int i = 0; i < 5; i++) {
+        EXPECT_TRUE(check_that_val_is_byteswapped((char *)(&out[i]),(char *)(&in[i]), sizeof(long)));
+    }
+}
+
+TEST_F(VariableReference_test, byteswap_int_arr) {
+    // ARRANGE
+    int in[5] = {20945, -29384293, INT32_MAX, INT32_MIN, 0}; 
+    int out[5];
+
+    memmgr->declare_extern_var(&in, "int a[5]");
+    Trick::VariableReference ref("a");
+
+    // ACT
+    Trick::VariableReference::byteswap_var((char *)(out),(char *)(in), ref);
+
+    // ASSERT
+    for (int i = 0; i < 5; i++) {
+        EXPECT_TRUE(check_that_val_is_byteswapped((char *)(&out[i]),(char *)(&in[i]), sizeof(int)));
+    }
+}
+
+TEST_F(VariableReference_test, byteswap_int_multidimensional_arr) {
+    // ARRANGE
+    int multidim_arr[5][4][3][2];
+    int out[5][4][3][2];
+
+
+    int counter = 500;
+    for (int i = 0; i < 5; i++) {
+        for (int j = 0; j < 4; j++) {
+            for (int k = 0; k < 3; k++) {
+                for (int l = 0; l < 2; l++) {
+                    multidim_arr[i][j][k][l] = counter++;
+                }
+            }
+        }
+    }
+
+    memmgr->declare_extern_var(&multidim_arr, "int multidim_arr[5][4][3][2]");
+    Trick::VariableReference ref("multidim_arr");
+
+    // ACT
+    Trick::VariableReference::byteswap_var((char *)(out),(char *)(multidim_arr), ref);
+
+    // ASSERT
+    for (int i = 0; i < 5; i++) {
+        for (int j = 0; j < 4; j++) {
+            for (int k = 0; k < 3; k++) {
+                for (int l = 0; l < 2; l++) {
+                    EXPECT_TRUE(check_that_val_is_byteswapped((char *)(&(out[i][j][k][l])),(char *)(&(multidim_arr[i][j][k][l])), sizeof(int)));
+                }
+            }
+        }
+    }
+}

trick_source/sim_services/VariableServer/test/VariableReference_test.hh

@@ -0,0 +1,56 @@
+/******************************TRICK HEADER*************************************
+PURPOSE:                     ( Common definitions for testing the VariableReference class )
+*******************************************************************************/
+
+#include <gtest/gtest.h>
+#include <iostream>
+#include <iomanip>
+#include <limits>
+#include <vector>
+
+#include "trick/MemoryManager.hh"
+#include "trick/VariableReference.hh"
+#include "trick/UdUnits.hh"
+
+#include <vector>
+
+class NestedObject {
+    public:
+    int a;
+    int b;
+};
+
+class TestObject {
+    public:
+    TestObject() {}
+
+	int length; /*  m xy-position */
+    double a;   /*  s time */
+    long b;     /*  nautical_mile miles */
+    long long c;     /*  in inches */
+    unsigned long d;     /*  light_year miles */
+    unsigned long long e;     /*  mi miles */
+    int error_units; /* asvdsfkj fake units */
+    wchar_t * wchar_str;
+    std::vector<int> vec;
+
+    NestedObject obj;
+};
+
+/*
+ Test Fixture.
+ */
+class VariableReference_test : public ::testing::Test {
+	protected:
+	    Trick::MemoryManager *memmgr;
+        Trick::UdUnits * udunits;
+		VariableReference_test() { 
+            memmgr = new Trick::MemoryManager; 
+            udunits = new Trick::UdUnits; 
+
+            udunits->read_default_xml();
+        }
+		~VariableReference_test() { delete memmgr; }
+		void SetUp() {}
+		void TearDown() {}
+};

trick_source/sim_services/VariableServer/test/VariableReference_writeValueAscii_test.cc

@@ -0,0 +1,252 @@
+#include "VariableReference_test.hh"
+
+
+TEST_F(VariableReference_test, writeValueAscii_int) {
+    // ARRANGE
+    // Create a variable to make a reference for
+    int test_a = 5;
+    (void) memmgr->declare_extern_var(&test_a, "int test_a");
+    Trick::VariableReference ref("test_a");
+    std::stringstream ss;
+
+    // ACT
+    ref.stageValue();
+    ref.prepareForWrite();
+    ref.writeValueAscii(ss);
+
+    // ASSERT
+    EXPECT_EQ(ss.str(), "5");
+}
+
+TEST_F(VariableReference_test, writeValueAscii_int_arr) {
+    // ARRANGE
+    // Create a variable to make a reference for
+    int test_a[5] = {1, 2, 3, 4, 5};
+    (void) memmgr->declare_extern_var(&test_a, "int test_a[5]");
+    Trick::VariableReference ref("test_a");
+    std::stringstream ss;
+
+    // ACT
+    ref.stageValue();
+    ref.prepareForWrite();
+    ref.writeValueAscii(ss);
+
+    // ASSERT
+    EXPECT_EQ(ss.str(), "1,2,3,4,5");
+}
+
+TEST_F(VariableReference_test, writeValueAscii_double) {
+    // ARRANGE
+    // Create a variable to make a reference for
+    double test_a = 867.309;
+    (void) memmgr->declare_extern_var(&test_a, "double test_a");
+    Trick::VariableReference ref_a("test_a");
+    std::stringstream ss_a;
+
+    double test_b = std::numeric_limits<double>::max();
+    (void) memmgr->declare_extern_var(&test_b, "double test_b");
+    Trick::VariableReference ref_b("test_b");
+    std::stringstream ss_b;
+
+    double test_c = std::numeric_limits<double>::min();
+    (void) memmgr->declare_extern_var(&test_c, "double test_c");
+    Trick::VariableReference ref_c("test_c");
+    std::stringstream ss_c;
+
+    // ACT
+    ref_a.stageValue();
+    ref_a.prepareForWrite();
+    ref_a.writeValueAscii(ss_a);
+
+    ref_b.stageValue();
+    ref_b.prepareForWrite();
+    ref_b.writeValueAscii(ss_b);
+
+    ref_c.stageValue();
+    ref_c.prepareForWrite();
+    ref_c.writeValueAscii(ss_c);
+
+    // ASSERT
+    EXPECT_EQ(ss_a.str(), "867.309");
+    EXPECT_EQ(ss_b.str(), "1.797693134862316e+308");
+    EXPECT_EQ(ss_c.str(), "2.225073858507201e-308");
+}
+
+TEST_F(VariableReference_test, writeValueAscii_char) {
+    // ARRANGE
+    // Create a variable to make a reference for
+    char test_a = 'j';
+    (void) memmgr->declare_extern_var(&test_a, "char test_a");
+    Trick::VariableReference ref_a("test_a");
+    std::stringstream ssa;
+
+    char test_b[7] = "jackie";
+    (void) memmgr->declare_extern_var(&test_b, "char test_b[7]");
+    Trick::VariableReference ref_b("test_b");
+    std::stringstream ssb;
+
+    // ACT
+    ref_a.stageValue();
+    ref_b.stageValue();
+
+    ref_a.prepareForWrite();
+    ref_b.prepareForWrite();
+
+    ref_a.writeValueAscii(ssa);
+    ref_b.writeValueAscii(ssb);
+
+
+    // ASSERT
+    EXPECT_EQ(ssa.str(), "106");
+    EXPECT_EQ(ssb.str(), "jackie");
+}
+
+
+TEST_F(VariableReference_test, writeValueAscii_unsigned_char) {
+    // ARRANGE
+    // Create a variable to make a reference for
+    unsigned char test_a = 'j';
+    (void) memmgr->declare_extern_var(&test_a, "unsigned char test_a");
+    Trick::VariableReference ref_a("test_a");
+    std::stringstream ssa;
+
+    unsigned char test_b[8] = "jackie\n";
+    (void) memmgr->declare_extern_var(&test_b, "unsigned char test_b[8]");
+    Trick::VariableReference ref_b("test_b");
+    std::stringstream ssb;
+
+    // ACT
+    ref_a.stageValue();
+    ref_b.stageValue();
+
+    ref_a.prepareForWrite();
+    ref_b.prepareForWrite();
+
+    ref_a.writeValueAscii(ssa);
+    ref_b.writeValueAscii(ssb);
+
+    // ASSERT
+    EXPECT_EQ(ssa.str(), "106");
+    EXPECT_EQ(ssb.str(), "jackie\\n");
+}
+
+
+TEST_F(VariableReference_test, writeValueAscii_wide_char) {
+    // ARRANGE
+    // Create a variable to make a reference for
+    wchar_t test_a = L'J';
+    (void) memmgr->declare_extern_var(&test_a, "wchar_t test_a");
+    Trick::VariableReference ref_a("test_a");
+    std::stringstream ssa;
+
+    wchar_t test_b[15] = L"jackiebutwider";
+    (void) memmgr->declare_extern_var(&test_b, "wchar_t test_b[15]");
+    Trick::VariableReference ref_b("test_b");
+    std::stringstream ssb;
+
+   // ACT
+    ref_a.stageValue();
+    ref_b.stageValue();
+
+    ref_a.prepareForWrite();
+    ref_b.prepareForWrite();
+
+    ref_a.writeValueAscii(ssa);
+    ref_b.writeValueAscii(ssb);
+
+    // ASSERT
+    // Original variable server behavior prints individual wchar as its ascii value
+    EXPECT_EQ(ssa.str(), "74");
+    EXPECT_EQ(ssb.str(), "jackiebutwider");
+}
+
+TEST_F(VariableReference_test, writeValueAscii_wide_char_unconstrained) {
+    TestObject obj;
+    obj.wchar_str = (wchar_t *) malloc (sizeof(wchar_t) * 7);
+    for (int i = 0; i < 6; i++) {
+        obj.wchar_str[i] = L'j';
+    }
+    obj.wchar_str[6] = L'\0';
+    (void) memmgr->declare_extern_var(&obj, "TestObject obj");
+    // (void) memmgr->declare_extern_var(&obj.wchar_str, "wchar_t * obj.wchar_str");
+
+    Trick::VariableReference ref("obj.wchar_str");
+    std::stringstream ss;
+
+    // ACT
+    ref.stageValue();
+    ref.prepareForWrite();
+    ref.writeValueAscii(ss);
+
+    // ASSERT
+    EXPECT_EQ(ss.str(), "jjjjjj");
+
+}
+
+TEST_F(VariableReference_test, writeValueAscii_std_string) {
+    // ARRANGE
+    // Create a variable to make a reference for
+    std::string test_a = "jackiebutstringy";
+    (void) memmgr->declare_extern_var(&test_a, "std::string test_a");
+    Trick::VariableReference ref("test_a");
+    std::stringstream ss;
+
+    // ACT
+    ref.stageValue();
+    ref.prepareForWrite();
+    ref.writeValueAscii(ss);
+
+    // ASSERT
+    EXPECT_EQ(ss.str(), "jackiebutstringy");
+}
+
+TEST_F(VariableReference_test, writeValueAscii_escape_characters) {
+    // ARRANGE
+    // Create a variable to make a reference for
+    std::string test_a = "\n\t\b\a\"\f\r\v";
+    (void) memmgr->declare_extern_var(&test_a, "std::string test_a");
+    Trick::VariableReference ref("test_a");
+    std::stringstream ss;
+
+    // ACT
+    ref.stageValue();
+    ref.prepareForWrite();
+    ref.writeValueAscii(ss);
+
+    // ASSERT
+    EXPECT_EQ(ss.str(), "\\n\\t\\b\\a\"\\f\\n\\v");
+}
+
+TEST_F(VariableReference_test, writeValueAscii_boolean) {
+    // ARRANGE
+    // Create a variable to make a reference for
+    bool test_a = true;
+    (void) memmgr->declare_extern_var(&test_a, "bool test_a");
+    Trick::VariableReference ref("test_a");
+    std::stringstream ss;
+
+    // ACT
+    ref.stageValue();
+    ref.prepareForWrite();
+    ref.writeValueAscii(ss);
+
+    // ASSERT
+    EXPECT_EQ(ss.str(), "1");
+}
+
+TEST_F(VariableReference_test, writeValueAscii_short) {
+    // ARRANGE
+    // Create a variable to make a reference for
+    short test_a = 255;
+    (void) memmgr->declare_extern_var(&test_a, "short test_a");
+    Trick::VariableReference ref("test_a");
+    std::stringstream ss;
+
+    // ACT
+    ref.stageValue();
+    ref.prepareForWrite();
+    ref.writeValueAscii(ss);
+
+    // ASSERT
+    EXPECT_EQ(ss.str(), "255");
+}

trick_source/sim_services/VariableServer/test/VariableReference_writeValueBinary_test.cc

@@ -0,0 +1,177 @@
+#include "VariableReference_test.hh"
+
+
+TEST_F(VariableReference_test, writeValueBinary_int) {
+    // ARRANGE
+    // Create a variable to make a reference for
+    int test_a = 4095;
+    (void) memmgr->declare_extern_var(&test_a, "int test_a");
+    Trick::VariableReference ref("test_a");
+    std::stringstream ss;
+
+    // ACT
+    ref.stageValue();
+    ref.prepareForWrite();
+    ref.writeValueBinary(ss);
+
+    
+    unsigned char expected_bytes[4] = {0xFF, 0x0F, 0x00, 0x00};
+    char * actual_bytes = (char *) malloc (sizeof(int));
+
+    ss.read(actual_bytes, 4);
+
+    // ASSERT
+    for (int i = 0; i < 4; i++) {
+        EXPECT_EQ(static_cast<unsigned char>(actual_bytes[i]), expected_bytes[i]);
+    }
+}
+
+TEST_F(VariableReference_test, writeValueBinary_float) {
+    // ARRANGE
+    // Create a variable to make a reference for
+    float test_a = 40.95;
+    (void) memmgr->declare_extern_var(&test_a, "float test_a");
+    Trick::VariableReference ref("test_a");
+    std::stringstream ss;
+
+    // ACT
+    ref.stageValue();
+    ref.prepareForWrite();
+    ref.writeValueBinary(ss);
+    
+    unsigned char expected_bytes[4] = {0xcd, 0xcc, 0x23, 0x42};
+
+    char * actual_bytes = (char *) malloc (sizeof(float));
+
+    ss.read(actual_bytes, 4);
+
+    // ASSERT
+    for (int i = 0; i < 4; i++) {
+        EXPECT_EQ(static_cast<unsigned char>(actual_bytes[i]), expected_bytes[i]);
+    }
+}
+
+TEST_F(VariableReference_test, writeValueBinary_int_arr) {
+    // ARRANGE
+    // Create a variable to make a reference for
+    int test_a[3] = {1, 2, 3};
+    (void) memmgr->declare_extern_var(&test_a, "int test_a[3]");
+    Trick::VariableReference ref("test_a");
+    std::stringstream ss;
+
+    // ACT
+    ref.stageValue();
+    ref.prepareForWrite();
+    ref.writeValueBinary(ss);
+
+    // ASSERT
+    char * actual_bytes = (char *) malloc (sizeof(int )* 3);
+    ss.read(actual_bytes, sizeof(int) * 3);
+    unsigned char expected_bytes[12] = {0x01, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00};
+
+
+    // ASSERT
+    for (int i = 0; i < 12; i++) {
+        EXPECT_EQ(static_cast<unsigned char>(actual_bytes[i]), expected_bytes[i]);
+    }
+}
+
+
+TEST_F(VariableReference_test, writeValueBinary_double_arr) {
+    // ARRANGE
+    // Create a variable to make a reference for
+    double test_a[3] = {1.0, 10.0, 100.0};
+    (void) memmgr->declare_extern_var(&test_a, "double test_a[3]");
+    Trick::VariableReference ref("test_a");
+    std::stringstream ss;
+
+    // ACT
+    ref.stageValue();
+    ref.prepareForWrite();
+    ref.writeValueBinary(ss);
+
+    // ASSERT
+    char * actual_bytes = (char *) malloc (sizeof(double )* 3);
+    ss.read(actual_bytes, sizeof(double) * 3);
+    unsigned char expected_bytes[24] = {0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xf0, 0x3f, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x24, 0x40, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x59, 0x40};
+
+    // ASSERT
+    for (int i = 0; i < 12; i++) {
+        EXPECT_EQ(static_cast<unsigned char>(actual_bytes[i]), expected_bytes[i]);
+    }
+}
+
+
+TEST_F(VariableReference_test, writeValueBinary_string) {
+    // ARRANGE
+    // Create a variable to make a reference for
+    std::string test_a = "abcdef";
+    (void) memmgr->declare_extern_var(&test_a, "std::string test_a");
+    Trick::VariableReference ref("test_a");
+    std::stringstream ss;
+
+    // ACT
+    ref.stageValue();
+    ref.prepareForWrite();
+    ref.writeValueBinary(ss);
+
+    // ASSERT
+    char * actual_bytes = (char *) malloc (test_a.length());
+    ss.read(actual_bytes, test_a.length());
+    unsigned char expected_bytes[6] = {0x61, 0x62, 0x63, 0x64, 0x65, 0x66};
+
+    // ASSERT
+    for (int i = 0; i < test_a.length(); i++) {
+        EXPECT_EQ(static_cast<unsigned char>(actual_bytes[i]), expected_bytes[i]);
+    }
+}
+
+TEST_F(VariableReference_test, writeNameBinary) {
+    // ARRANGE
+    // Create a variable to make a reference for
+    std::string test_a = "abcdef";
+    (void) memmgr->declare_extern_var(&test_a, "std::string test_a");
+    Trick::VariableReference ref("test_a");
+    std::stringstream ss;
+
+    // ACT
+    ref.stageValue();
+    ref.prepareForWrite();
+    ref.writeNameBinary(ss);
+
+    // ASSERT
+    char * actual_bytes = (char *) malloc (sizeof(int) + strlen(ref.getName()));
+    ss.read(actual_bytes, sizeof(int) +  6);
+    unsigned char expected_bytes[sizeof(int) +  6] = {0x06, 0x00, 0x00, 0x00, 0x74, 0x65, 0x73, 0x74, 0x5f, 0x61};
+
+    // ASSERT
+    for (int i = 0; i < sizeof(int) +  strlen(ref.getName()); i++) {
+        EXPECT_EQ(static_cast<unsigned char>(actual_bytes[i]), expected_bytes[i]);
+    }
+}
+
+
+TEST_F(VariableReference_test, writeValueBinaryByteswap_int) {
+    // ARRANGE
+    // Create a variable to make a reference for
+    int test_a = 4095;
+    (void) memmgr->declare_extern_var(&test_a, "int test_a");
+    Trick::VariableReference ref("test_a");
+    std::stringstream ss;
+
+    // ACT
+    ref.stageValue();
+    ref.prepareForWrite();
+    ref.writeValueBinary(ss, true);
+
+    
+    unsigned char expected_bytes[4] = {0x00, 0x00, 0x0F, 0xFF};
+    char * actual_bytes = (char *) malloc (sizeof(int));
+
+    ss.read(actual_bytes, 4);
+
+    // ASSERT
+    for (int i = 0; i < 4; i++) {
+        EXPECT_EQ(static_cast<unsigned char>(actual_bytes[i]), expected_bytes[i]);
+    }
+}

trick_source/sim_services/VariableServer/test/VariableServerSession_test.cc

@@ -0,0 +1,190 @@
+/******************************TRICK HEADER*************************************
+PURPOSE:                     ( Tests for the VariableServerSession class )
+*******************************************************************************/
+
+#include <gtest/gtest.h>
+#include <iostream>
+#include <iomanip>
+#include <limits>
+#include <vector>
+
+#include "trick/MemoryManager.hh"
+#include "trick/UdUnits.hh"
+
+#include "TestConnection.hh"
+#include "trick/VariableServerSession.hh"
+#include "trick/var_binary_parser.hh"
+
+
+/*
+ Test Fixture.
+ */
+class VariableServerSession_test : public ::testing::Test {
+	protected:
+	    Trick::MemoryManager *memmgr;
+        Trick::UdUnits * udunits;
+
+        TestConnection connection;
+
+		VariableServerSession_test() { 
+            memmgr = new Trick::MemoryManager; 
+            udunits = new Trick::UdUnits; 
+
+            udunits->read_default_xml();
+        }
+		~VariableServerSession_test() { delete memmgr; }
+		void SetUp() {}
+		void TearDown() {}
+};
+
+TEST_F(VariableServerSession_test, toString) {
+
+    int a = 5;
+    double b = 6;
+    std::string c = "Hello";
+    (void) memmgr->declare_extern_var(&a, "int a");
+    (void) memmgr->declare_extern_var(&b, "double b");
+    (void) memmgr->declare_extern_var(&c, "std::string c");
+
+    Trick::VariableServerSession session(&connection);
+
+    session.var_add("a");
+    session.var_add("b");
+    session.var_add("c");
+    session.var_binary();
+
+    std::stringstream ss;
+    ss << session;
+
+    std::string expected = "    \"format\":\"BINARY\",\n    \"update_rate\":0.1,\n    \"variables\":[\n      \"a\",\n      \"b\",\n      \"c\"\n    ]\n";
+    EXPECT_EQ(ss.str(), expected);
+
+    session.var_ascii();
+    expected = "    \"format\":\"ASCII\",\n    \"update_rate\":0.1,\n    \"variables\":[\n      \"a\",\n      \"b\",\n      \"c\"\n    ]\n";
+    ss.str("");
+    ss << session;
+    EXPECT_EQ(ss.str(), expected);
+}
+
+TEST_F(VariableServerSession_test, var_sync) {
+    // ARRANGE
+    Trick::VariableServerSession session(&connection);
+
+
+    // ACT
+    session.var_sync(0);
+    // ASSERT
+    ASSERT_EQ(session.get_copy_mode(), VS_COPY_ASYNC);
+    ASSERT_EQ(session.get_write_mode(), VS_WRITE_ASYNC);
+
+
+    // ACT
+    session.var_sync(1);
+    // ASSERT
+    ASSERT_EQ(session.get_copy_mode(), VS_COPY_SCHEDULED);
+    ASSERT_EQ(session.get_write_mode(), VS_WRITE_ASYNC);
+
+    // ACT
+    session.var_sync(2);
+    // ASSERT
+    ASSERT_EQ(session.get_copy_mode(), VS_COPY_SCHEDULED);
+    ASSERT_EQ(session.get_write_mode(), VS_WRITE_WHEN_COPIED);
+}
+
+
+TEST_F(VariableServerSession_test, large_message_ascii) {
+    // ARRANGE
+    Trick::VariableServerSession session(&connection);
+
+    const static int big_arr_size = 4000;
+    // Make an array too big to fit in a single message
+
+    int big_arr[big_arr_size];
+    for (int i = 0; i < big_arr_size; i++) {
+        big_arr[i] = i;
+    }
+
+    (void) memmgr->declare_extern_var(&big_arr, "int big_arr[4000]");
+
+    for (int i = 0; i < big_arr_size; i++) {
+        std::string var_name = "big_arr[" + std::to_string(i) + "]";
+        session.var_add(var_name.c_str());
+    } 
+
+    // ACT
+    session.copy_sim_data();
+    session.write_data();
+
+    // ASSERT
+    ASSERT_TRUE(connection.ascii_messages_written.size() > 1);
+    int counter = 0;
+
+    int message_index = 0;
+    for (int i = 0; i < connection.ascii_messages_written.size(); i++) {
+        std::string message = connection.ascii_messages_written[i];
+        std::stringstream ss(message);
+        std::string token;
+
+        // First val in first message should be the message type, 0
+        if (i == 0) {
+            std::getline(ss, token, '\t');
+            int message_type = stoi(token);
+            EXPECT_EQ(message_type, 0);
+        }
+
+        while (std::getline(ss, token, '\t')) {
+            if (token == "\n") { break; }
+
+            int num = stoi(token);
+            EXPECT_EQ(counter, num);
+            counter++;
+        }
+    }
+
+    EXPECT_EQ(counter, big_arr_size);
+}
+
+TEST_F(VariableServerSession_test, large_message_binary) {
+    // ARRANGE
+    Trick::VariableServerSession session(&connection);
+    session.var_binary();
+
+    const static int big_arr_size = 4000;
+    // Make an array too big to fit in a single message
+
+    int big_arr[big_arr_size];
+    for (int i = 0; i < big_arr_size; i++) {
+        big_arr[i] = i;
+    }
+
+    (void) memmgr->declare_extern_var(&big_arr, "int big_arr[4000]");
+
+    for (int i = 0; i < big_arr_size; i++) {
+        std::string var_name = "big_arr[" + std::to_string(i) + "]";
+        session.var_add(var_name.c_str());
+    } 
+
+    // ACT
+    session.copy_sim_data();
+    session.write_data();
+
+    // ASSERT
+    ParsedBinaryMessage full_message;
+    for (int i = 0; i < connection.binary_messages_written.size(); i++) {
+        ParsedBinaryMessage partial_message;
+        partial_message.parse(connection.binary_messages_written[i]);
+        full_message.combine(partial_message);
+    }
+
+    ASSERT_EQ(full_message.getNumVars(), big_arr_size);
+    for (int i = 0; i < big_arr_size; i++) {
+        try {
+            std::string var_name = "big_arr[" + std::to_string(i) + "]";
+            Var variable = full_message.getVariable(var_name);
+            
+            EXPECT_EQ(variable.getValue<int>(), i);
+        } catch (std::exception& ex) {
+            FAIL() << ex.what();
+        }
+    }
+}

trick_source/sim_services/VariableServer/var_server_ext.cpp

@@ -11,161 +11,215 @@
 
 extern Trick::VariableServer * the_vs ;
 
+int command_debug = 0;
+
 Trick::VariableServerThread * get_vst() {
     return the_vs->get_vst(pthread_self()) ;
 }
 
+Trick::VariableServerSession * get_session() {
+    return the_vs->get_session(pthread_self()) ;
+}
+
 int var_add(std::string in_name) {
-    Trick::VariableServerThread * vst ;
-    vst = get_vst() ;
-    if (vst != NULL ) {
-        vst->var_add(in_name) ;
+    if (command_debug) {
+        std::cout << "var_add: " << in_name << std::endl;
+    }
+
+    Trick::VariableServerSession * session = get_session();
+    
+    if (session != NULL ) {
+        session->var_add(in_name) ;
     }
     return(0) ;
 }
 
 int var_add(std::string in_name, std::string in_units) {
-    Trick::VariableServerThread * vst ;
-    vst = get_vst() ;
-    if (vst != NULL ) {
-        vst->var_add(in_name, in_units) ;
+    if (command_debug) {
+        std::cout << "var_add: " << in_name << std::endl;
+    }
+    Trick::VariableServerSession * session = get_session();
+    
+    if (session != NULL ) {
+        session->var_add(in_name, in_units) ;
     }
     return(0) ;
 }
 
 int var_remove(std::string in_name) {
-    Trick::VariableServerThread * vst ;
-    vst = get_vst() ;
-    if (vst != NULL ) {
-        vst->var_remove(in_name) ;
+    if (command_debug) {
+        std::cout << "var_remove: " << in_name << std::endl;
+    }
+    Trick::VariableServerSession * session = get_session();
+    
+    if (session != NULL ) {
+        session->var_remove(in_name) ;
     }
     return(0) ;
 }
 
 int var_units(std::string var_name , std::string units_name) {
-    Trick::VariableServerThread * vst ;
-    vst = get_vst() ;
-    if (vst != NULL ) {
-        vst->var_units(var_name , units_name) ;
+    if (command_debug) {
+        std::cout << "var_units: " << var_name << std::endl;
+    }
+    Trick::VariableServerSession * session = get_session();
+    
+    if (session != NULL ) {
+        session->var_units(var_name , units_name) ;
     }
     return(0) ;
 }
 
 int var_exists(std::string in_name) {
-    Trick::VariableServerThread * vst ;
-    vst = get_vst() ;
-    if (vst != NULL ) {
-        vst->var_exists(in_name) ;
+    if (command_debug) {
+        std::cout << "var_exists: " << in_name << std::endl;
+    }
+    Trick::VariableServerSession * session = get_session();
+    
+    if (session != NULL ) {
+        session->var_exists(in_name) ;
     }
     return(0) ;
 }
 
 int var_send_once(std::string in_name) {
-    Trick::VariableServerThread * vst ;
-    vst = get_vst() ;
-    if (vst != NULL ) {
-        vst->var_send_once(in_name, 1) ;
+    if (command_debug) {
+        std::cout << "var_send_once: " << in_name << std::endl;
+    }
+    Trick::VariableServerSession * session = get_session();
+    
+    if (session != NULL ) {
+        session->var_send_once(in_name, 1) ;
     }
     return(0) ;
 }
 
 int var_send_once(std::string in_name, int num) {
-    Trick::VariableServerThread * vst ;
-    vst = get_vst() ;
-    if (vst != NULL ) {
-        vst->var_send_once(in_name, num) ;
+    if (command_debug) {
+        std::cout << "var_send_once: " << in_name << std::endl;
+    }
+    Trick::VariableServerSession * session = get_session();
+    
+    if (session != NULL ) {
+        session->var_send_once(in_name, num) ;
     }
     return(0) ;
 }
 
 int var_send() {
-    Trick::VariableServerThread * vst ;
-    vst = get_vst() ;
-    if (vst != NULL ) {
-        vst->var_send() ;
+    if (command_debug) {
+        std::cout << "var_send: " << std::endl;
+    }
+
+    Trick::VariableServerSession * session = get_session();
+    
+    if (session != NULL ) {
+        session->var_send() ;
     }
     return(0) ;
 }
 
 int var_clear() {
-    Trick::VariableServerThread * vst ;
-    vst = get_vst() ;
-    if (vst != NULL ) {
-        vst->var_clear() ;
+    if (command_debug) {
+        std::cout << "var_clear: " << std::endl;
     }
+    Trick::VariableServerSession * session = get_session();
+    
+    if (session != NULL ) {
+        session->var_clear() ;
+    }
+
+    // std::cout << "Done with var_clear" << std::endl;
     return(0) ;
 }
 
 int var_cycle(double in_rate) {
-    Trick::VariableServerThread * vst ;
-    vst = get_vst() ;
-    if (vst != NULL ) {
-        vst->var_cycle(in_rate) ;
+    if (command_debug) {
+        std::cout << "var_cycle: " << in_rate << std::endl;
+    }
+
+    Trick::VariableServerSession * session = get_session();
+    
+    if (session != NULL ) {
+        session->var_cycle(in_rate) ;
     }
     return(0) ;
 }
 
 int var_pause() {
-    Trick::VariableServerThread * vst ;
-    vst = get_vst() ;
-    if (vst != NULL ) {
-        vst->set_pause(true) ;
+    if (command_debug) {
+        std::cout << "var_pause" << std::endl;
+    }
+
+    Trick::VariableServerSession * session = get_session();
+    
+    if (session != NULL ) {
+        session->set_pause(true) ;
     }
     return(0) ;
 
 }
 
 int var_unpause() {
-    Trick::VariableServerThread * vst ;
-    vst = get_vst() ;
-    if (vst != NULL ) {
-        vst->set_pause(false) ;
+    if (command_debug) {
+        std::cout << "var_unpause" << std::endl;
+    }
+    Trick::VariableServerSession * session = get_session();
+    
+    if (session != NULL ) {
+        session->set_pause(false) ;
     }
     return(0) ;
 
 }
 
 int var_exit() {
-    Trick::VariableServerThread * vst ;
-    vst = get_vst() ;
-    if (vst != NULL ) {
-        vst->var_exit() ;
+     if (command_debug) {
+        std::cout << "var_exit" << std::endl;
+    }
+    Trick::VariableServerSession * session = get_session();
+    
+    if (session != NULL ) {
+        session->var_exit() ;
     }
     return(0) ;
 }
 
 int var_validate_address(int on_off) {
-    Trick::VariableServerThread * vst ;
-    vst = get_vst() ;
-    if (vst != NULL ) {
-        vst->var_validate_address((bool)on_off) ;
+    if (command_debug) {
+        std::cout << "var_validate_address" << std::endl;
+    }
+    Trick::VariableServerSession * session = get_session();
+    
+    if (session != NULL ) {
+        session->var_validate_address((bool)on_off) ;
     }
     return(0) ;
 }
 
 int var_debug(int level) {
-    Trick::VariableServerThread * vst ;
-    vst = get_vst() ;
-    if (vst != NULL ) {
-        vst->var_debug(level) ;
+    Trick::VariableServerSession * session = get_session();
+    
+    if (session != NULL ) {
+        session->var_debug(level) ;
     }
     return(0) ;
 }
 
 int var_ascii() {
-    Trick::VariableServerThread * vst ;
-    vst = get_vst() ;
-    if (vst != NULL ) {
-        vst->var_ascii() ;
+    Trick::VariableServerSession * session = get_session();
+    
+    if (session != NULL ) {
+        session->var_ascii() ;
     }
     return(0) ;
 }
 
 int var_binary() {
-    Trick::VariableServerThread * vst ;
-    vst = get_vst() ;
-    if (vst != NULL ) {
-        vst->var_binary() ;
+    Trick::VariableServerSession * session = get_session();
+    
+    if (session != NULL ) {
+        session->var_binary() ;
     }
     return(0) ;
 }
@@ -176,19 +230,19 @@ int var_retry_bad_ref() {
 }
 
 int var_binary_nonames() {
-    Trick::VariableServerThread * vst ;
-    vst = get_vst() ;
-    if (vst != NULL ) {
-        vst->var_binary_nonames() ;
+    Trick::VariableServerSession * session  = get_session();
+    
+    if (session != NULL ) {
+        session->var_binary_nonames() ;
     }
     return(0) ;
 }
 
 int var_set_copy_mode(int mode) {
-    Trick::VariableServerThread * vst ;
-    vst = get_vst() ;
-    if (vst != NULL ) {
-        vst->var_set_copy_mode(mode) ;
+    Trick::VariableServerSession * session = get_session();
+    
+    if (session != NULL ) {
+        session->var_set_copy_mode(mode) ;
         if ( mode == VS_COPY_SCHEDULED ) {
             the_vs->get_next_sync_call_time() ;
             the_vs->get_next_freeze_call_time() ;
@@ -198,28 +252,25 @@ int var_set_copy_mode(int mode) {
 }
 
 int var_set_write_mode(int mode) {
-    Trick::VariableServerThread * vst ;
-    vst = get_vst() ;
-    if (vst != NULL ) {
-        vst->var_set_write_mode(mode) ;
+Trick::VariableServerSession * session = get_session();
+    if (session != NULL ) {
+        session->var_set_write_mode(mode) ;
     }
     return 0 ;
 }
 
 int var_set_send_stdio(int mode) {
-    Trick::VariableServerThread * vst ;
-    vst = get_vst() ;
-    if (vst != NULL ) {
-        vst->set_send_stdio((bool)mode) ;
+Trick::VariableServerSession * session = get_session();
+    if (session != NULL ) {
+        session->set_send_stdio((bool)mode) ;
     }
     return 0 ;
 }
 
 int var_sync(int mode) {
-    Trick::VariableServerThread * vst ;
-    vst = get_vst() ;
-    if (vst != NULL ) {
-        vst->var_sync(mode) ;
+Trick::VariableServerSession * session = get_session();
+    if (session != NULL ) {
+        session->var_sync(mode) ;
         if ( mode ) {
             the_vs->get_next_sync_call_time() ;
             the_vs->get_next_freeze_call_time() ;
@@ -229,73 +280,66 @@ int var_sync(int mode) {
 }
 
 int var_set_frame_multiple(unsigned int mult) {
-    Trick::VariableServerThread * vst ;
-    vst = get_vst() ;
-    if (vst != NULL ) {
-        vst->var_set_frame_multiple(mult) ;
+Trick::VariableServerSession * session = get_session();
+    if (session != NULL ) {
+        session->var_set_frame_multiple(mult) ;
     }
     return 0 ;
 }
 
 int var_set_frame_offset(unsigned int offset) {
-    Trick::VariableServerThread * vst ;
-    vst = get_vst() ;
-    if (vst != NULL ) {
-        vst->var_set_frame_offset(offset) ;
+Trick::VariableServerSession * session = get_session();
+    if (session != NULL ) {
+        session->var_set_frame_offset(offset) ;
     }
     return 0 ;
 }
 
 int var_set_freeze_frame_multiple(unsigned int mult) {
-    Trick::VariableServerThread * vst ;
-    vst = get_vst() ;
-    if (vst != NULL ) {
-        vst->var_set_freeze_frame_multiple(mult) ;
+Trick::VariableServerSession * session = get_session();
+    if (session != NULL ) {
+        session->var_set_freeze_frame_multiple(mult) ;
     }
     return 0 ;
 }
 
 int var_set_freeze_frame_offset(unsigned int offset) {
-    Trick::VariableServerThread * vst ;
-    vst = get_vst() ;
-    if (vst != NULL ) {
-        vst->var_set_freeze_frame_offset(offset) ;
+Trick::VariableServerSession * session = get_session();
+    if (session != NULL ) {
+        session->var_set_freeze_frame_offset(offset) ;
     }
     return 0 ;
 }
 
 int var_byteswap(bool on_off) {
-    Trick::VariableServerThread * vst ;
-    vst = get_vst() ;
-    if (vst != NULL ) {
-        vst->var_byteswap(on_off) ;
+Trick::VariableServerSession * session = get_session();
+    if (session != NULL ) {
+        session->var_byteswap(on_off) ;
     }
     return(0) ;
 }
 
-int var_signal() {
-    Trick::VariableServerThread * vst ;
-    vst = get_vst() ;
-    if (vst != NULL ) {
-        vst->var_signal() ;
-    }
-    return(0) ;
-}
+// int var_signal() {
+// Trick::VariableServerSession * session = get_session();
+//     if (session != NULL ) {
+//         session->var_signal() ;
+//     }
+//     return(0) ;
+// }
 
-int var_multicast(bool on_off) {
-    Trick::VariableServerThread * vst ;
-    vst = get_vst() ;
-    if (vst != NULL ) {
-        vst->var_multicast(on_off) ;
-    }
-    return(0) ;
-}
+// int var_multicast(bool on_off) {
+// Trick::VariableServerSession * session = get_session();
+//     if (session != NULL ) {
+//         session->var_multicast(on_off) ;
+//     }
+//     return(0) ;
+// }
 
 int var_write_stdio(int stream , std::string text ) {
-    Trick::VariableServerThread * vst ;
-    vst = get_vst() ;
-    if (vst != NULL and vst->get_send_stdio() == true) {
-        vst->write_stdio(stream, text) ;
+    // std::cout << "Executing var_write_stdio" << std::endl;
+    Trick::VariableServerSession * session = get_session();
+    if (session != NULL and session->get_send_stdio() == true) {
+        session->write_stdio(stream, text) ;
     } else {
         if ( stream == 1 ) {
             fprintf( stdout , "%s" , text.c_str() ) ;
@@ -307,14 +351,14 @@ int var_write_stdio(int stream , std::string text ) {
 }
 
 int var_set_client_tag( std::string text ) {
-    Trick::VariableServerThread * vst ;
-    vst = get_vst() ;
+    if (command_debug) {
+        std::cout << "var_set_client_tag: " << text << std::endl;
+    }
+    Trick::VariableServerThread * vst = get_vst();
     if (vst != NULL) {
-        // tag char declared length is 80
-        if (text.length()>=80) {
-            text.resize(79);
-        }
-        strcpy(vst->get_connection().client_tag, text.c_str());
+
+        vst->set_client_tag(text);
+        
 #if __linux
 #ifdef __GNUC__
 #if __GNUC__ >= 4 && __GNUC_MINOR__ >= 2
@@ -328,55 +372,53 @@ int var_set_client_tag( std::string text ) {
 }
 
 int var_send_list_size() {
-    Trick::VariableServerThread * vst ;
-    vst = get_vst() ;
-    if (vst != NULL ) {
-        vst->send_list_size() ;
+    if (command_debug) {
+        std::cout << "var_send_list_size" << std::endl;
+    }   
+
+    Trick::VariableServerSession * session = get_session();
+    if (session != NULL ) {
+        session->send_list_size() ;
     }
     return(0) ;
 }
 
 int send_sie_resource() {
-    Trick::VariableServerThread * vst ;
-    vst = get_vst() ;
-    if (vst != NULL ) {
-        vst->send_sie_resource() ;
+Trick::VariableServerSession * session = get_session();
+    if (session != NULL ) {
+        session->send_sie_resource() ;
     }
     return 0 ;
 }
 
 int send_sie_class() {
-    Trick::VariableServerThread * vst ;
-    vst = get_vst() ;
-    if (vst != NULL ) {
-        vst->send_sie_class() ;
+Trick::VariableServerSession * session = get_session();
+    if (session != NULL ) {
+        session->send_sie_class() ;
     }
     return 0 ;
 }
 
 int send_sie_enum() {
-    Trick::VariableServerThread * vst ;
-    vst = get_vst() ;
-    if (vst != NULL ) {
-        vst->send_sie_enum() ;
+Trick::VariableServerSession * session = get_session();
+    if (session != NULL ) {
+        session->send_sie_enum() ;
     }
     return 0 ;
 }
 
 int send_sie_top_level_objects() {
-    Trick::VariableServerThread * vst ;
-    vst = get_vst() ;
-    if (vst != NULL ) {
-        return vst->send_sie_top_level_objects() ;
+Trick::VariableServerSession * session = get_session();
+    if (session != NULL ) {
+        return session->send_sie_top_level_objects() ;
     }
     return 0 ;
 }
 
 int send_file(std::string file_name) {
-    Trick::VariableServerThread * vst ;
-    vst = get_vst() ;
-    if (vst != NULL ) {
-        return vst->send_file(file_name) ;
+Trick::VariableServerSession * session = get_session();
+    if (session != NULL ) {
+        return session->send_file(file_name) ;
     }
     return 0 ;
 }
@@ -384,20 +426,18 @@ int send_file(std::string file_name) {
 
 // Command to turn on log to playback file
 int var_server_log_on() {
-    Trick::VariableServerThread * vst ;
-    vst = get_vst() ;
-    if (vst != NULL ) {
-        return vst->set_log_on() ;
+Trick::VariableServerSession * session = get_session();
+    if (session != NULL ) {
+        return session->set_log_on() ;
     }
     return 0 ;
 }
 
 // Command to turn off log to playback file
 int var_server_log_off() {
-    Trick::VariableServerThread * vst ;
-    vst = get_vst() ;
-    if (vst != NULL ) {
-        return vst->set_log_off() ;
+Trick::VariableServerSession * session = get_session();
+    if (session != NULL ) {
+        return session->set_log_off() ;
     }
     return 0 ;
 }
@@ -416,7 +456,9 @@ extern "C" void var_server_list_connections(void) {
  * C wrapper Trick::VariableServer::get_hostname
  */
 extern "C" const char * var_server_get_hostname(void) {
-    return(the_vs->get_hostname()) ;
+    const char * ret = (the_vs->get_hostname()) ;
+    printf("varserverext:  %s", ret);
+    return ret;
 }
 
 /**
@@ -556,8 +598,10 @@ int var_set_base( const char  * var , T value , const char * units ) {
             ref_assignment(ref , &v_tree) ;
             if(ref->units != NULL) {
                 free(ref->units) ;
+                ref->units = NULL;
             }
             free(ref) ;
+            ref = NULL;
         } else {
             message_publish(MSG_WARNING,"Cannot assign to %s because io_spec does not allow input\n", var) ;
         }

trick_source/sim_services/VariableServer/vs_format_ascii.cpp

@@ -1,265 +0,0 @@
-/*
-PURPOSE:      (Allows clients to get and set Trick parameters)
-PROGRAMMERS: (((Keith Vetter) (LinCom) (September 2001) (--)))
-*/
-
-#include <iostream>
-#include <stdlib.h>
-#include <string.h>
-#include <ctype.h>
-#include <limits>
-#include <udunits2.h>
-#include <sstream>
-
-#include "trick/parameter_types.h"
-#include "trick/attributes.h"
-#include "trick/bitfield_proto.h"
-#include "trick/wcs_ext.h"
-#include "trick/VariableServer.hh"
-#include "trick/TrickConstant.hh"
-
-/* PROTO */
-size_t escape_str(const char *in_s, char *out_s);
-
-#define MAX_VAL_STRLEN 2048
-
-int vs_format_ascii(Trick::VariableReference * var, char *value, size_t value_size) {
-
-    /* for string types, return -1 if string is too big to fit in buffer (MAX_VAL_STRLEN) */
-    REF2 * ref ;
-    ref = var->ref ;
-    std::string var_name = ref->reference;
-
-    // handle returning an array
-    int size = 0 ;
-    value[0] = '\0' ;
-
-    // data to send was copied to buffer in copy_sim_data
-    void * buf_ptr = var->buffer_out ;
-    while (size < var->size) {
-        size += var->ref->attr->size ;
-        char temp_buf[MAX_VAL_STRLEN];
-
-        switch (ref->attr->type) {
-
-        case TRICK_CHARACTER:
-            if (ref->attr->num_index == ref->num_index) {
-                snprintf(temp_buf, value_size, "%d",(char)cv_convert_double(var->conversion_factor, *(char *)buf_ptr));
-            } else {
-                /* All but last dim specified, leaves a char array */
-                escape_str((char *) buf_ptr, temp_buf);
-                size = var->size ;
-            }
-            break;
-        case TRICK_UNSIGNED_CHARACTER:
-            if (ref->attr->num_index == ref->num_index) {
-                snprintf(temp_buf, value_size, "%u",(unsigned char)cv_convert_double(var->conversion_factor,*(unsigned char *)buf_ptr));
-            } else {
-                /* All but last dim specified, leaves a char array */
-                escape_str((char *) buf_ptr, temp_buf);
-                size = var->size ;
-            }
-            break;
-
-        case TRICK_WCHAR:{
-                if (ref->attr->num_index == ref->num_index) {
-                    snprintf(temp_buf, value_size, "%d",*(wchar_t *) buf_ptr);
-                } else {
-                    // convert wide char string char string
-                    size_t len = wcs_to_ncs_len((wchar_t *)buf_ptr) + 1 ;
-                    if (len > MAX_VAL_STRLEN) {
-                        return (-1);
-                    }
-                    wcs_to_ncs((wchar_t *) buf_ptr, temp_buf, len);
-                    size = var->size ;
-                }
-            }
-            break;
-
-        case TRICK_STRING:
-            if ((char *) buf_ptr != NULL) {
-                escape_str((char *) buf_ptr, temp_buf);
-                size = var->size ;
-            } else {
-                temp_buf[0] = '\0';
-            }
-            break;
-
-        case TRICK_WSTRING:
-            if ((wchar_t *) buf_ptr != NULL) {
-                // convert wide char string char string
-                size_t len = wcs_to_ncs_len((wchar_t *)buf_ptr) + 1 ;
-                if (len > MAX_VAL_STRLEN) {
-                    return (-1);
-                }
-                wcs_to_ncs((wchar_t *) buf_ptr, temp_buf, len);
-                size = var->size ;
-            } else {
-                temp_buf[0] = '\0';
-            }
-            break;
-
-#if ( __linux | __sgi )
-        case TRICK_BOOLEAN:
-            snprintf(temp_buf, value_size, "%d",(unsigned char)cv_convert_double(var->conversion_factor,*(unsigned char *)buf_ptr));
-            break;
-#endif
-
-        case TRICK_SHORT:
-            snprintf(temp_buf, value_size, "%d", (short)cv_convert_double(var->conversion_factor,*(short *)buf_ptr));
-            break;
-
-        case TRICK_UNSIGNED_SHORT:
-            snprintf(temp_buf, value_size, "%u",(unsigned short)cv_convert_double(var->conversion_factor,*(unsigned short *)buf_ptr));
-            break;
-
-        case TRICK_INTEGER:
-        case TRICK_ENUMERATED:
-#if ( __sun | __APPLE__ )
-        case TRICK_BOOLEAN:
-#endif
-            snprintf(temp_buf, value_size, "%d", (int)cv_convert_double(var->conversion_factor,*(int *)buf_ptr));
-            break;
-
-        case TRICK_BITFIELD:
-            snprintf(temp_buf, value_size, "%d", GET_BITFIELD(buf_ptr, ref->attr->size, ref->attr->index[0].start, ref->attr->index[0].size));
-            break;
-
-        case TRICK_UNSIGNED_BITFIELD:
-            snprintf(temp_buf, value_size, "%u", GET_UNSIGNED_BITFIELD(buf_ptr, ref->attr->size, ref->attr->index[0].start, ref->attr->index[0].size));
-            break;
-        case TRICK_UNSIGNED_INTEGER:
-            snprintf(temp_buf, value_size, "%u", (unsigned int)cv_convert_double(var->conversion_factor,*(unsigned int *)buf_ptr));
-            break;
-
-        case TRICK_LONG: {
-            long l = *(long *)buf_ptr;
-            if (var->conversion_factor != cv_get_trivial()) {
-                l = (long)cv_convert_double(var->conversion_factor, l);
-            }
-            snprintf(temp_buf, value_size, "%ld", l);
-            break;
-        }
-
-        case TRICK_UNSIGNED_LONG: {
-            unsigned long ul = *(unsigned long *)buf_ptr;
-            if (var->conversion_factor != cv_get_trivial()) {
-                ul = (unsigned long)cv_convert_double(var->conversion_factor, ul);
-            }
-            snprintf(temp_buf, value_size, "%lu", ul);
-            break;
-        }
-
-        case TRICK_FLOAT:
-            snprintf(temp_buf, value_size, "%.8g", cv_convert_float(var->conversion_factor,*(float *)buf_ptr));
-            break;
-
-        case TRICK_DOUBLE:
-            snprintf(temp_buf, value_size, "%.16g", cv_convert_double(var->conversion_factor,*(double *)buf_ptr));
-            break;
-
-        case TRICK_LONG_LONG: {
-            long long ll = *(long long *)buf_ptr;
-            if (var->conversion_factor != cv_get_trivial()) {
-                ll = (long long)cv_convert_double(var->conversion_factor, ll);
-            }
-            snprintf(temp_buf, value_size, "%lld", ll);
-            break;
-        }
-
-        case TRICK_UNSIGNED_LONG_LONG: {
-            unsigned long long ull = *(unsigned long long *)buf_ptr;
-            if (var->conversion_factor != cv_get_trivial()) {
-                ull = (unsigned long long)cv_convert_double(var->conversion_factor, ull);
-            }
-            snprintf(temp_buf, value_size, "%llu", ull);
-            break;
-        }
-
-        case TRICK_NUMBER_OF_TYPES:
-            snprintf(temp_buf, value_size, "BAD_REF" );
-            break;
-
-        default:{
-                return (-1);
-            }
-        } // end switch
-
-        if (size < var->size) {
-        // if returning an array, continue array as comma separated values
-            strcat(temp_buf, ",") ;
-            buf_ptr = (void*) ((long)buf_ptr + var->ref->attr->size) ;
-        }
-        strncat(value, temp_buf, value_size - strlen(value) - 1);
-    } //end while
-
-    if (ref->units) {
-        std::stringstream unit_str;
-        if ( ref->attr->mods & TRICK_MODS_UNITSDASHDASH ) {
-            unit_str << " {--}";
-        } else {
-            unit_str << " {" << ref->units << "}";
-
-        }
-        size_t max_copy_size = value_size - strlen(value) - 1;
-        strncat(value, unit_str.str().c_str(), max_copy_size);
-    }
-
-    return (0);
-}
-
-
-/**
- * Escape all of the non printable characters in a string.
- */
-size_t escape_str(const char *in_s, char *out_s)
-{
-    size_t i, in_len, out_len;
-    if (in_s == NULL) {
-        out_s[0] = '\0';
-        return 0;
-    }
-    in_len = strlen(in_s);
-    out_len = 0;
-    if (out_s != NULL) {
-        out_s[0] = '\0';
-    }
-    for (i = 0; i < in_len; i++) {
-        int ch = in_s[i];
-        char work_s[6];
-
-        if (isprint(ch)) {
-            work_s[0] = ch;
-            work_s[1] = '\0';
-        } else {
-            if (ch == '\a') {
-                snprintf(work_s, sizeof(work_s), "\\a");
-            } else if (ch == '\b') {
-                snprintf(work_s, sizeof(work_s), "\\b");
-            } else if (ch == '\f') {
-                snprintf(work_s, sizeof(work_s), "\\f");
-            } else if (ch == '\n') {
-                snprintf(work_s, sizeof(work_s), "\\n");
-            } else if (ch == '\r') {
-                snprintf(work_s, sizeof(work_s), "\\n");
-            } else if (ch == '\t') {
-                snprintf(work_s, sizeof(work_s), "\\t");
-            } else if (ch == '\v') {
-                snprintf(work_s, sizeof(work_s), "\\v");
-            } else {
-                snprintf(work_s, sizeof(work_s), "\\x%02x", ch);
-            }
-        }
-        out_len += strlen(work_s);
-        if (out_s != NULL) {
-            if (out_len < MAX_VAL_STRLEN) {
-                strcat(out_s, work_s);
-            } else {
-                // indicate string is truncated because it's too big
-                return -1;
-            }
-        }
-    }
-
-    return (out_len);
-}

trick_source/trick_utils/CMakeLists.txt

@@ -23,6 +23,9 @@ add_library( trick_utils_objs OBJECT ${TRICK_UTILS_SRC} )
 ###############################################################
 
 add_subdirectory(comm)
+add_subdirectory(connection_handlers)
 add_subdirectory(math)
 add_subdirectory(units)
+add_subdirectory(var_binary_parser)
+
 

trick_source/trick_utils/connection_handlers/ClientConnection.cpp

@@ -0,0 +1 @@
+#include "trick/ClientConnection.hh"

trick_source/trick_utils/connection_handlers/ClientListener.cpp

@@ -0,0 +1,115 @@
+#include <unistd.h>
+#include <iostream>
+#include <sys/select.h>
+
+#include "trick/ClientListener.hh"
+#include "trick/tc_proto.h"
+
+
+
+Trick::ClientListener::ClientListener () : _listen_dev(), initialized(false) {
+    char hname[80];
+    gethostname(hname , (size_t) 80 ) ;
+    saved_source = std::string(hname);
+    strcpy(_listen_dev.client_tag, "<empty>");
+    tc_error(&_listen_dev, 0);
+}
+
+Trick::ClientListener::~ClientListener () {
+
+}
+
+int Trick::ClientListener::initialize(std::string hostname, int port) {
+    int ret = tc_init_with_connection_info(&_listen_dev, AF_INET, SOCK_STREAM, hostname.c_str(), port);
+    initialized = true;
+    return ret;
+}
+
+int Trick::ClientListener::initialize() {
+    int ret = tc_init(&_listen_dev);
+    if (ret != TC_SUCCESS) {
+        
+        fprintf(stderr, "ERROR: Could not establish listen port for Variable Server. Aborting.\n");
+        ret = -1 ;
+    }
+    initialized = true;
+    return ret;
+}
+
+
+int Trick::ClientListener::setBlockMode(TCCommBlocking mode) {
+    if (!initialized)
+        return -1;
+
+    return tc_blockio(&_listen_dev, mode);
+}
+
+
+bool Trick::ClientListener::checkForNewConnections() {
+    if (!initialized)
+        return -1;
+
+    fd_set rfds;
+    struct timeval timeout_time = { 2, 0 };
+    FD_ZERO(&rfds);
+    FD_SET(_listen_dev.socket, &rfds);
+    timeout_time.tv_sec = 2 ;
+    select(_listen_dev.socket + 1, &rfds, NULL, NULL, &timeout_time);
+
+    return FD_ISSET(_listen_dev.socket, &rfds);
+}
+
+
+const char * Trick::ClientListener::getHostname () {
+    if (!initialized)
+        return "";
+
+    return _listen_dev.hostname;
+}
+
+
+int Trick::ClientListener::getPort() {
+    if (!initialized)
+        return -1;
+
+    return _listen_dev.port;
+}
+
+
+int Trick::ClientListener::disconnect() {
+    if (!initialized)
+        return -1;
+
+    return tc_disconnect(&_listen_dev) ;    
+}
+
+bool Trick::ClientListener::validateSourceAddress(std::string requested_source_address) {
+    char hname[80];
+    static struct sockaddr_in s_in;
+    gethostname(hname, (size_t) 80);
+
+    // Test to see if the restart address is on this machine.  If it is not, it's not an error
+    if ( strcmp( requested_source_address.c_str(), hname )) {
+        if (! inet_pton(AF_INET, requested_source_address.c_str(), (struct in_addr *)&s_in.sin_addr.s_addr) ) {
+            return false;
+        }
+    }
+
+    return true;
+}
+
+int Trick::ClientListener::checkSocket() {
+    if (!initialized)
+        return -1;
+
+    struct sockaddr_in s_in;
+    int s_in_size =  sizeof(s_in) ;
+    getsockname( _listen_dev.socket , (struct sockaddr *)&s_in, (socklen_t *)&s_in_size) ;
+    printf("restart variable server message port = %d\n" , ntohs(s_in.sin_port)) ;
+    _listen_dev.port = ntohs(s_in.sin_port);
+}
+
+bool Trick::ClientListener::isInitialized() {
+    return initialized;
+}
+

trick_source/trick_utils/connection_handlers/Makefile

@@ -0,0 +1,15 @@
+TRICK_HOME := $(abspath $(dir $(lastword $(MAKEFILE_LIST)))../../..)
+
+# set CONFIG_MK to allow compilation without running configure
+CONFIG_MK = 1
+
+include ${TRICK_HOME}/share/trick/makefiles/Makefile.common
+# set the TRICK_LIB variable to create a separate library for comm
+TRICK_LIB := $(TRICK_LIB_DIR)/libtrick_connection_handlers.a
+include ${TRICK_HOME}/share/trick/makefiles/Makefile.tricklib
+-include Makefile_deps
+
+TRICK_CXXFLAGS += -std=c++11
+
+# make the comm library when called by the master makefile.
+trick: ${TRICK_LIB}

trick_source/trick_utils/connection_handlers/MulticastManager.cpp

@@ -0,0 +1,63 @@
+#include "trick/MulticastManager.hh"
+#include <string.h>
+#include <vector>
+
+Trick::MulticastManager::MulticastManager() {
+}
+
+Trick::MulticastManager::~MulticastManager() {
+    
+}
+
+int Trick::MulticastManager::restart () {
+    // Keep address list the same, but we may need to get a new socket
+    return initialize();
+}
+
+
+int Trick::MulticastManager::broadcast (std::string message) {
+    if (!is_initialized()) {
+        initialize();
+    }
+    const char * message_send = message.c_str();
+    for (struct sockaddr_in& address : addresses) {
+        sendto(mcast_socket , message_send , strlen(message_send) , 0 , (struct sockaddr *)&address , (socklen_t)sizeof(address)) ;
+    }
+}
+
+int Trick::MulticastManager::addAddress (std::string addr, int port) {
+
+    struct sockaddr_in mcast_addr;
+    memset(&mcast_addr, 0, sizeof(mcast_addr));
+    mcast_addr.sin_family = AF_INET;
+    mcast_addr.sin_addr.s_addr = inet_addr(addr.c_str());
+    mcast_addr.sin_port = htons((uint16_t) port);
+    addresses.emplace_back(mcast_addr);
+}
+
+int Trick::MulticastManager::is_initialized () {
+    return initialized;
+}
+
+int Trick::MulticastManager::initialize() {
+    
+    mcast_socket = socket(AF_INET, SOCK_DGRAM, 0);
+    if (mcast_socket < 0) {
+        perror("vs_mcast_init socket");
+        return -1;
+    }
+
+    int option_value = 1;
+    if (setsockopt(mcast_socket, SOL_SOCKET, SO_REUSEADDR, (char *) &option_value, (socklen_t) sizeof(option_value)) < 0) {
+        perror("setsockopt: reuseaddr");
+        return -1;
+    }
+#ifdef SO_REUSEPORT
+    if (setsockopt(mcast_socket, SOL_SOCKET, SO_REUSEPORT, (char *) &option_value, sizeof(option_value)) < 0) {
+        perror("setsockopt: reuseport");
+        return -1;
+    }
+#endif
+    initialized = 1;
+    return 0;
+}

trick_source/trick_utils/connection_handlers/TCConnection.cpp

@@ -0,0 +1,117 @@
+#include "trick/TCConnection.hh"
+#include "trick/tc.h"
+#include "trick/tc_proto.h"
+#include <sstream>
+#include <iostream>
+
+Trick::TCConnection::TCConnection () {}
+
+int Trick::accept(ClientListener *listener, Trick::TCConnection *connection) {
+    if (!listener->isInitialized())
+        return -1;
+        
+    if ( listener->_listen_dev.socket_type == SOCK_STREAM ) {
+        return tc_accept(&(listener->_listen_dev), &(connection->_device));        
+    }
+
+    return 0;
+}
+
+int Trick::TCConnection::initialize() {
+    _device.disabled = TC_COMM_FALSE ;
+    _device.disable_handshaking = TC_COMM_TRUE ;
+    _device.blockio_limit = 0.0 ;
+    _device.blockio_type = TC_COMM_BLOCKIO ;
+    _device.client_id = 0 ;
+    strcpy(_device.client_tag, "") ;
+    _device.error_handler = (TrickErrorHndlr *) calloc(1, (int)sizeof(TrickErrorHndlr));
+    _device.error_handler->report_level = TRICK_ERROR_CAUTION;
+}
+
+int Trick::TCConnection::write (char * message, int size) {
+    int ret = tc_write(&_device, message, size);
+    return ret;
+}
+
+int Trick::TCConnection::write (const std::string& message) {
+    char send_buf[message.length()+1];
+    strcpy (send_buf, message.c_str());
+    int ret = tc_write(&_device, send_buf, message.length());
+    return ret;
+}
+
+std::string Trick::TCConnection::read  (int max_len) {
+    char incoming_msg[max_len];
+    int nbytes = recvfrom( _device.socket, incoming_msg, MAX_CMD_LEN, MSG_PEEK, NULL, NULL ) ;
+    if (nbytes == 0 ) {
+        return 0;
+    }
+
+    if (nbytes != -1) { // -1 means socket is nonblocking and no data to read
+        /* find the last newline that is present on the socket */
+        incoming_msg[nbytes] = '\0' ;
+        char *last_newline = rindex( incoming_msg , '\n') ;
+
+        /* if there is a newline then there is a complete command on the socket */
+        if ( last_newline != NULL ) {
+            /* only remove up to (and including) the last newline on the socket */
+            int size = last_newline - incoming_msg + 1;
+            nbytes = recvfrom( _device.socket, incoming_msg, size, 0 , NULL, NULL ) ;
+        } else {
+            nbytes = 0 ;
+        }
+    }
+
+    std::stringstream msg_stream;
+
+    if ( nbytes > 0 ) {
+
+        int msg_len = nbytes ;
+        // if (debug >= 3) {
+        //     message_publish(MSG_DEBUG, "%p tag=<%s> var_server received bytes = msg_len = %d\n", &_device, _device.client_tag, nbytes);
+        // }
+
+        incoming_msg[msg_len] = '\0' ;
+
+        for( int ii = 0 , jj = 0 ; ii <= msg_len ; ii++ ) {
+            if ( incoming_msg[ii] != '\r' ) {
+                msg_stream << incoming_msg[ii] ;
+            }
+        }
+    }
+
+    return msg_stream.str();
+}
+
+
+std::string Trick::TCConnection::get_client_tag () {
+    return std::string(_device.client_tag);
+}
+
+int Trick::TCConnection::set_client_tag(std::string tag) {
+    // Max size of device client tag is 80
+    
+    // TODO: Make 80 a constant somewhere, probably in TC device
+    if (tag.length() >= 80) {
+        tag.resize(79);
+    }
+    strcpy(_device.client_tag, tag.c_str());
+    return 0;
+}
+
+int Trick::TCConnection::get_socket() {
+    return _device.socket;
+}
+
+
+int Trick::TCConnection::disconnect () {
+    return tc_disconnect(&_device);
+}
+
+int Trick::TCConnection::setBlockMode(int block_mode) {
+    return tc_blockio(&_device, (TCCommBlocking)block_mode);
+}
+
+int Trick::TCConnection::setErrorReporting (bool on) {
+    return tc_error(&_device, (int)on);
+}

trick_source/trick_utils/var_binary_parser/.gitignore

@@ -1,2 +1,2 @@
 *.o
-TEST_var_binary_parser
+TEST_var_binary_parser

trick_source/trick_utils/var_binary_parser/test/Makefile

@@ -34,4 +34,4 @@ TEST_var_binary_parser.o : TEST_var_binary_parser.cc $(OTHER_OBJECTS)
 
 TEST_var_binary_parser : TEST_var_binary_parser.o $(OTHER_OBJECTS)
 	@echo 'Building TEST_var_binary_parser'
-	$(CXX) $(TRICK_SYSTEM_LDFLAGS) $(CPPFLAGS) -o $@ $^ -L${TRICK_HOME}/lib_${TRICK_HOST_CPU} $(LIBS) $(EXEC_LINK_LIBS)
+	$(CXX) $(TRICK_SYSTEM_LDFLAGS) $(CPPFLAGS) -o $@ $^ -L${TRICK_HOME}/lib_${TRICK_HOST_CPU} $(LIBS) $(EXEC_LINK_LIBS)

trick_source/web/CivetServer/include/VariableServerSessionWeb.hh

@@ -0,0 +1,51 @@
+/*************************************************************************
+PURPOSE: (Represent the state of a variable server websocket connection.)
+**************************************************************************/
+
+#ifndef WSSESSION_HH
+#define WSSESSION_HH
+
+#include <vector>
+#include <string>
+
+#ifndef SWIG
+#include "CivetServer.h"
+#endif
+
+#include "trick/WebSocketSession.hh"
+#include "VariableServerVariable.hh"
+
+class VariableServerSession : public WebSocketSession {
+    public:
+        VariableServerSession(struct mg_connection *nc);
+        ~VariableServerSession();
+        void marshallData();                             /* -- base */
+        void sendMessage();                              /* -- base */
+        int  handleMessage(const std::string&);          /* -- base */
+
+        void setTimeInterval(unsigned int milliseconds);
+        void addVariable(char* vname);
+        void stageValues();
+        void pause();
+        void unpause();
+        void clear();
+        void exit();
+
+        // static int bad_ref_int ;
+
+    private:
+        int sendErrorMessage(const char* fmt, ... );
+        int sendSieMessage(void);
+        int sendUnitsMessage(const char* vname);
+        // REF2* make_error_ref(const char* in_name);
+        double stageTime;
+        bool dataStaged;
+
+        std::vector<VariableServerVariable*> session_variables;
+        bool cyclicSendEnabled;
+        long long nextTime;
+        long long intervalTimeTics;
+};
+
+WebSocketSession* makeVariableServerSession( struct mg_connection *nc );
+#endif

trickops.py

@@ -37,6 +37,14 @@ class SimTestWorkflow(TrickWorkflow):
          # are only in the remaining_run_jobs list. - Jordan 2/2023
          remaining_run_jobs.remove(job)
 
+      # Some tests fail intermittently for reasons not related to the tests themselves, mostly network weirdness.
+      # Allow retries so that we can still cover some network-adjacent code
+      retry_allowed_sims = self.get_sims(labels='retries_allowed')
+      retry_allowed_jobs = [run.get_run_job() for run in [item for sublist in [sim.get_runs() for sim in retry_allowed_sims] for item in sublist]]
+      for job in retry_allowed_jobs:
+         run_jobs.remove(job)
+
+
       builds_status = self.execute_jobs(build_jobs, max_concurrent=self.cpus, header='Executing all sim builds.')
       first_phase_run_status = self.execute_jobs(first_run_jobs, max_concurrent=self.cpus, header="Executing first phase runs.")
       runs_status   = self.execute_jobs(remaining_run_jobs,   max_concurrent=self.cpus, header='Executing remaining runs.')