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serval-dna/overlay_probe.c

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Switch to feature-driven linking This introduces a new way of linking Serval executables and dynamic libraries from static libraries like libservald.a -- called "feature-driven" linking. The Makefile now links servald and serval-tests from libservald.a, rather than from an explicit list of object (.o) files. Thanks to the section-based method for registering functions such as HTTP handlers, CLI commands and MDP handlers, these object files had become "stand-alone" and hence were no longer included in the link because there was no unresolved reference that required them to be linked in. The new "feature.h" provides the DECLARE_FEATURE(name) macro that each stand-alone source file uses to declare the named feature(s) it provides. Each executable can call the USE_FEATURE(name) macro in any of its explicitly-linked source files to cause the corresponding object(s) to be included in the link, eg, servald_features.c. The DEFINE_BINDING() macro has been extended so that every individual MDP binding is given a feature name based on its port number macro, eg, "mdp_binding_MDP_PORT_ECHO". Some features have been factored into their own separate source files so they can be omitted or included in a build independently of each other: - the MDP bindings for MDP_PORT_DNALOOKUP, MDP_PORT_ECHO, MDP_PORT_TRACE, MDP_PORT_KEYMAPREQUEST, MDP_PORT_RHIZOME_xxx, MDP_PORT_PROBE, MDP_PORT_STUN, MDP_PORT_STUNREQ - the CLI "log" and "echo" commands - the CLI "rhizome direct" command The JNI source files are only compiled if the <jni.h> header is present, otherwise they are omitted from libservald.so.
2016-10-13 02:58:23 +00:00
/*
Serval DNA MDP overlay network link tracking
Copyright (C) 2016 Flinders University
Copyright (C) 2012-2013 Serval Project Inc.
Copyright (C) 2010-2012 Paul Gardner-Stephen
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include "serval.h"
#include "conf.h"
#include "route_link.h"
#include "overlay_interface.h"
#include "overlay_buffer.h"
#include "fdqueue.h"
Fix header files for Xcode iOS build - make "debug.h" a private header so that the DEBUG() macro does not interfere with Xcode Debug builds, which set DEBUG=1 - move all #include "debug.h" from headers into .c files - move 'struct idebug' into a new public header "idebug.h" so that "log.h" can be public - move HTTPD port number defs from "httpd.h" to "constants.h", so that "httpd.h" can be private and "conf.h" can be public - add missing nested includes so each header compiles stand-alone without error - #include "sodium.h" instead of <sodium.h> - #include "sqlite3.h" instead of <sqlite3.h> - add header guard to "fifo.h" - fix header guard in "sync_keys.h"
2017-11-24 00:03:39 +00:00
#include "debug.h"
Switch to feature-driven linking This introduces a new way of linking Serval executables and dynamic libraries from static libraries like libservald.a -- called "feature-driven" linking. The Makefile now links servald and serval-tests from libservald.a, rather than from an explicit list of object (.o) files. Thanks to the section-based method for registering functions such as HTTP handlers, CLI commands and MDP handlers, these object files had become "stand-alone" and hence were no longer included in the link because there was no unresolved reference that required them to be linked in. The new "feature.h" provides the DECLARE_FEATURE(name) macro that each stand-alone source file uses to declare the named feature(s) it provides. Each executable can call the USE_FEATURE(name) macro in any of its explicitly-linked source files to cause the corresponding object(s) to be included in the link, eg, servald_features.c. The DEFINE_BINDING() macro has been extended so that every individual MDP binding is given a feature name based on its port number macro, eg, "mdp_binding_MDP_PORT_ECHO". Some features have been factored into their own separate source files so they can be omitted or included in a build independently of each other: - the MDP bindings for MDP_PORT_DNALOOKUP, MDP_PORT_ECHO, MDP_PORT_TRACE, MDP_PORT_KEYMAPREQUEST, MDP_PORT_RHIZOME_xxx, MDP_PORT_PROBE, MDP_PORT_STUN, MDP_PORT_STUNREQ - the CLI "log" and "echo" commands - the CLI "rhizome direct" command The JNI source files are only compiled if the <jni.h> header is present, otherwise they are omitted from libservald.so.
2016-10-13 02:58:23 +00:00
/* Collection of unicast echo responses to detect working links */
DEFINE_BINDING(MDP_PORT_PROBE, overlay_mdp_service_probe);
static int overlay_mdp_service_probe(struct internal_mdp_header *header, struct overlay_buffer *payload)
{
IN();
if (header->source_port!=MDP_PORT_ECHO){
WARN("Probe packets should be returned from remote echo port");
RETURN(-1);
}
DEBUGF(overlayrouting, "Received probe response from %s", alloca_tohex_sid_t(header->source->sid));
if (header->source->reachable == REACHABLE_SELF)
RETURN(0);
uint8_t interface = ob_get(payload);
struct socket_address addr;
addr.addrlen = ob_remaining(payload);
Fix compiler warnings when building with android ndk 13b
2016-11-07 00:08:23 +00:00
if ((size_t)addr.addrlen > sizeof(addr.store))
Switch to feature-driven linking This introduces a new way of linking Serval executables and dynamic libraries from static libraries like libservald.a -- called "feature-driven" linking. The Makefile now links servald and serval-tests from libservald.a, rather than from an explicit list of object (.o) files. Thanks to the section-based method for registering functions such as HTTP handlers, CLI commands and MDP handlers, these object files had become "stand-alone" and hence were no longer included in the link because there was no unresolved reference that required them to be linked in. The new "feature.h" provides the DECLARE_FEATURE(name) macro that each stand-alone source file uses to declare the named feature(s) it provides. Each executable can call the USE_FEATURE(name) macro in any of its explicitly-linked source files to cause the corresponding object(s) to be included in the link, eg, servald_features.c. The DEFINE_BINDING() macro has been extended so that every individual MDP binding is given a feature name based on its port number macro, eg, "mdp_binding_MDP_PORT_ECHO". Some features have been factored into their own separate source files so they can be omitted or included in a build independently of each other: - the MDP bindings for MDP_PORT_DNALOOKUP, MDP_PORT_ECHO, MDP_PORT_TRACE, MDP_PORT_KEYMAPREQUEST, MDP_PORT_RHIZOME_xxx, MDP_PORT_PROBE, MDP_PORT_STUN, MDP_PORT_STUNREQ - the CLI "log" and "echo" commands - the CLI "rhizome direct" command The JNI source files are only compiled if the <jni.h> header is present, otherwise they are omitted from libservald.so.
2016-10-13 02:58:23 +00:00
RETURN(WHY("Badly formatted probe packet"));
ob_get_bytes(payload, (unsigned char*)&addr.addr, addr.addrlen);
RETURN(link_unicast_ack(header->source, &overlay_interfaces[interface], &addr));
OUT();
}
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