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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.
82 lines
2.8 KiB
C
82 lines
2.8 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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// append the address of a unicast link into a packet buffer
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static void overlay_append_unicast_address(struct subscriber *subscriber, struct overlay_buffer *buff)
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{
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if ( subscriber->destination
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&& subscriber->destination->unicast
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&& subscriber->destination->address.addr.sa_family==AF_INET
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) {
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overlay_address_append(NULL, buff, subscriber);
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ob_append_ui32(buff, subscriber->destination->address.inet.sin_addr.s_addr);
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ob_append_ui16(buff, subscriber->destination->address.inet.sin_port);
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DEBUGF(overlayrouting, "Added STUN info for %s", alloca_tohex_sid_t(subscriber->sid));
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}else{
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DEBUGF(overlayrouting, "Unable to give address of %s, %d", alloca_tohex_sid_t(subscriber->sid),subscriber->reachable);
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}
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}
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DEFINE_BINDING(MDP_PORT_STUNREQ, overlay_mdp_service_stun_req);
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static int overlay_mdp_service_stun_req(struct internal_mdp_header *header, struct overlay_buffer *payload)
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{
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DEBUGF(overlayrouting, "Processing STUN request from %s", alloca_tohex_sid_t(header->source->sid));
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struct internal_mdp_header reply;
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bzero(&reply, sizeof reply);
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mdp_init_response(header, &reply);
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reply.qos = OQ_MESH_MANAGEMENT;
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struct overlay_buffer *replypayload = ob_new();
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ob_limitsize(replypayload, MDP_MTU);
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ob_checkpoint(replypayload);
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while (ob_remaining(payload) > 0) {
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struct subscriber *subscriber=NULL;
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if (overlay_address_parse(NULL, payload, &subscriber))
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break;
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if (!subscriber){
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DEBUGF(overlayrouting, "Unknown subscriber");
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continue;
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}
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overlay_append_unicast_address(subscriber, replypayload);
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if (ob_overrun(payload))
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break;
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ob_checkpoint(replypayload);
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}
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ob_rewind(replypayload);
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if (ob_position(replypayload)){
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DEBUGF(overlayrouting, "Sending reply");
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ob_flip(replypayload);
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overlay_send_frame(&reply, replypayload);
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}
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ob_free(replypayload);
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return 0;
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}
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