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71cbe86566
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.
61 lines
2.2 KiB
C
61 lines
2.2 KiB
C
/*
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Serval DNA MDP overlay network link tracking
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Copyright (C) 2016 Flinders University
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Copyright (C) 2012-2013 Serval Project Inc.
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Copyright (C) 2010-2012 Paul Gardner-Stephen
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#include "serval.h"
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#include "conf.h"
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#include "route_link.h"
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#include "overlay_interface.h"
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#include "overlay_buffer.h"
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DEFINE_BINDING(MDP_PORT_STUN, overlay_mdp_service_stun);
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static int overlay_mdp_service_stun(struct internal_mdp_header *header, struct overlay_buffer *payload)
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{
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DEBUGF(overlayrouting, "Processing STUN info from %s", alloca_tohex_sid_t(header->source->sid));
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while(ob_remaining(payload)>0){
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struct subscriber *subscriber=NULL;
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// TODO explain addresses, link expiry time, resolve differences between addresses...
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if (overlay_address_parse(NULL, payload, &subscriber)){
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break;
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}
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struct socket_address addr;
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addr.addrlen = sizeof(addr.inet);
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addr.inet.sin_family = AF_INET;
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addr.inet.sin_addr.s_addr = ob_get_ui32(payload);
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addr.inet.sin_port = ob_get_ui16(payload);
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if (!subscriber || (subscriber->reachable&REACHABLE_DIRECT))
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continue;
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// only trust stun responses from our directory service or about the packet sender.
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if (directory_service == header->source || subscriber == header->source){
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struct network_destination *destination = create_unicast_destination(&addr, NULL);
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if (destination){
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overlay_send_probe(subscriber, destination, OQ_MESH_MANAGEMENT);
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release_destination_ref(destination);
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}
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}
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}
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return 0;
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}
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