trick/trick_source/sim_services/Message/MessageTCDevice.cpp

#include <string.h>
#include <stdlib.h>

#include "trick/MessageTCDevice.hh"
#include "trick/message_type.h"
#include "trick/montecarlo_c_intf.h"
#include "trick/tc_proto.h"

Trick::MessageTCDeviceListenThread::MessageTCDeviceListenThread(MessageTCDevice * in_mtcd) :
 Trick::ThreadBase("MessageListen"),
 mtcd(in_mtcd) ,
 listen_dev() {
    /* And a TCDevice for message server @e listen_device is configured. */
    listen_dev.disabled = TC_COMM_FALSE ;
    listen_dev.disable_handshaking = TC_COMM_TRUE ;
    listen_dev.blockio_limit = 0.0 ;
    listen_dev.blockio_type = TC_COMM_BLOCKIO ;
    listen_dev.client_id = 0 ;
    listen_dev.port = 0 ;
    strcpy(listen_dev.client_tag, "") ;
    listen_dev.error_handler = (TrickErrorHndlr *) calloc(1, (int)sizeof(TrickErrorHndlr));
    listen_dev.error_handler->report_level = TRICK_ERROR_CAUTION;
}

Trick::MessageTCDeviceListenThread::~MessageTCDeviceListenThread() {
    free(listen_dev.error_handler) ;
    if ( listen_dev.hostname ) {
       free(listen_dev.hostname) ;
    }
    close(listen_dev.socket) ;
}

int Trick::MessageTCDeviceListenThread::get_port() {
    return listen_dev.port ;
}

int Trick::MessageTCDeviceListenThread::init_listen_device() {
    return tc_init(&listen_dev);
}

int Trick::MessageTCDeviceListenThread::restart() {
    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 message port = %d\n" , ntohs(s_in.sin_port)) ;
    return 0;
}

void * Trick::MessageTCDeviceListenThread::thread_body() {

	/** @par Design Details: */
    int status ;
    fd_set rfds;
    struct timeval timeout_time = { 2, 0 };
    TCDevice * new_connection ;

    pthread_setcanceltype(PTHREAD_CANCEL_ASYNCHRONOUS, NULL);

    /** @li If a proper port is found, make a new connection to the message server that is listening if possible.
     *      Once the connection is established, the new connection is added to the subscriber connection list.
     */
    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)) {
            new_connection = new TCDevice() ;
            new_connection->disabled = TC_COMM_FALSE ;
            new_connection->disable_handshaking = TC_COMM_TRUE ;
            new_connection->blockio_limit = 0.0 ;
            new_connection->blockio_type = TC_COMM_BLOCKIO ;
            new_connection->dmtcp_use_real = 1 ;
            new_connection->client_id = 0 ;
            strcpy(new_connection->client_tag, "") ;
            new_connection->error_handler = (TrickErrorHndlr *) calloc(1, (int)sizeof(TrickErrorHndlr));
            new_connection->error_handler->report_level = TRICK_ERROR_CAUTION;

            status = tc_accept(&listen_dev, new_connection);

            if (status == TC_SUCCESS) {
                mtcd->add_connection(new_connection) ;
            }
        }
    }

    return NULL ;

}

void Trick::MessageTCDeviceListenThread::dump( std::ostream & oss ) {
    oss << "Trick::MessageTCDeviceListenThread (" << name << ")" << std::endl ;
    oss << "    port = " << get_port() << std::endl ;
    Trick::ThreadBase::dump(oss) ;
}

/* --------------------------------------------------------------------------- */

Trick::MessageTCDevice::MessageTCDevice() :
 listen_thread(this)
{
    combined_message = new char[20480] ;
    name = "tcdevice" ;
    return ;
}

// DESTRUCTOR
Trick::MessageTCDevice::~MessageTCDevice() {
    delete[] combined_message ;
}

Trick::MessageTCDeviceListenThread & Trick::MessageTCDevice::get_listen_thread() {
    return listen_thread ;
}

void Trick::MessageTCDevice::add_connection( TCDevice * new_conn ) {
    connections.push_back(new_conn) ;
}

int Trick::MessageTCDevice::shutdown() {
    listen_thread.cancel_thread() ;
    return 0 ;
}

int Trick::MessageTCDevice::default_data() {

    int ret ;

    if ( mc_is_slave() ) {
        enabled = false ;
    }
    /** @par Design Details: */
    /** @li Reserve a listen socket */
    if ( enabled ) {
        ret = listen_thread.init_listen_device() ;
        if ( ret == TC_SUCCESS ) {
            port = listen_thread.get_port() ;
        } else {
            fprintf(stderr, "ERROR: Could not create listen port for message server.  Aborting.\n");
            return (-1);
        }
    }

    return(0) ;
}

/**
@details
-# If this subscriber is enabled, creates a thread for a new socket connection
*/
int Trick::MessageTCDevice::init() {
    if ( enabled ) {
        listen_thread.create_thread() ;
    }
    return(0) ;
}

/**
@details
-# Call the listen thread restart routine
-# Get the port number from the listen thread
-# If the listen thread has not been created, call the listen thread create thread method
*/
int Trick::MessageTCDevice::restart() {
    if ( enabled ) {
        listen_thread.restart() ;
        port = listen_thread.get_port() ;
        if ( listen_thread.get_pthread_id() == 0 ) {
            listen_thread.create_thread() ;
        }
    }
    return 0 ;
}


// MEMBER FUNCTION
void Trick::MessageTCDevice::update( unsigned int level , std::string header , std::string message ) {

    std::vector < TCDevice *>::iterator it ;
    int nbytes ;
    int length ;
    std::string color_code ;

    /** @par Design Details: */

    switch (level) {
        case MSG_NORMAL :
            color_code = "\033[00m" ; // normal
            break ;
        case MSG_INFO :
            color_code = "\033[32m" ; // green
            break ;
        case MSG_WARNING :
            color_code = "\033[33m" ; // yellow
            break ;
        case MSG_ERROR :
            color_code = "\033[31m" ; // red
            break ;
        case MSG_DEBUG :
            color_code = "\033[36m" ; // cyan
            break ;
        default :
            color_code = "\033[00m" ; // normal
            break ;
    }

    /** @li If this subscriber is not enabled, do nothing. Otherwise, it gets the update. */
    if ( enabled && level < 100 ) {

    	 /** @li The message is composed as message header + message text */
        if ( color ) {
            snprintf( combined_message , 20480 , "%s%s%s\033[00m" , header.c_str() , color_code.c_str() , message.c_str()) ;
        } else {
            snprintf( combined_message , 20480 , "%s%s" , header.c_str() , message.c_str()) ;
        }
        length = (int)strlen(combined_message) ;

        /** @li The message is broadcast to all socket connection this subscriber has. */
        it = connections.begin() ;
        while ( it != connections.end() ) {
            nbytes = tc_write( *it, combined_message, length) ;

            /** @li All those connections that can not receive the message get disconnected.  */
            if ( nbytes != length ) {
                tc_disconnect(*it) ;
                it = connections.erase(it) ;
            } else {
                it++ ;
            }
        }
    }

    return ;
}