4 * The secure anycast tunneling protocol (satp) defines a protocol used
5 * for communication between any combination of unicast and anycast
6 * tunnel endpoints. It has less protocol overhead than IPSec in Tunnel
7 * mode and allows tunneling of every ETHER TYPE protocol (e.g.
8 * ethernet, ip, arp ...). satp directly includes cryptography and
9 * message authentication based on the methodes used by SRTP. It is
10 * intended to deliver a generic, scaleable and secure solution for
11 * tunneling and relaying of packets of any protocol.
14 * Copyright (C) 2007-2009 Othmar Gsenger, Erwin Nindl,
15 * Christian Pointner <satp@wirdorange.org>
17 * This file is part of Anytun.
19 * Anytun is free software: you can redistribute it and/or modify
20 * it under the terms of the GNU General Public License as published by
21 * the Free Software Foundation, either version 3 of the License, or
24 * Anytun is distributed in the hope that it will be useful,
25 * but WITHOUT ANY WARRANTY; without even the implied warranty of
26 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
27 * GNU General Public License for more details.
29 * You should have received a copy of the GNU General Public License
30 * along with anytun. If not, see <http://www.gnu.org/licenses/>.
35 #include <boost/asio.hpp>
41 #include "../datatypes.h"
44 #include "../signalController.h"
45 #include "../buffer.h"
46 #include "connectionList.h"
47 #include "rtpSessionTable.h"
48 #include "syncRtpCommand.h"
49 #include "../syncQueue.h"
50 #include "../syncClient.h"
51 #include "syncOnConnect.hpp"
53 #include "../threadUtils.hpp"
55 #include "commandHandler.h"
56 #include "callIdQueue.h"
59 #include "portWindow.h"
63 #define MAX_PACKET_SIZE 1500
65 void listener(RtpSession::proto::socket* sock1, RtpSession::proto::socket* sock2, std::string call_id, int dir, SyncQueue* queue, bool* running)
67 cLog.msg(Log::PRIO_NOTICE) << "listener(" << call_id << "/" << dir << ") started";
71 Buffer buf(u_int32_t(MAX_PACKET_SIZE));
72 RtpSession::proto::endpoint remote_end;
75 buf.setLength(MAX_PACKET_SIZE);
78 len = 0;//sock1->recvFromNonBlocking(buf.getBuf(), buf.getLength(), remote_end, 1000);
80 len = 0; //sock2->recvFromNonBlocking(buf.getBuf(), buf.getLength(), remote_end, 1000);
83 RtpSession& session = gRtpSessionTable.getSession(call_id);
84 if(session.isDead()) {
85 cLog.msg(Log::PRIO_NOTICE) << "listener(" << call_id << "/" << dir << ") session is dead, exiting";
93 if((dir == 1 && remote_end != session.getRemoteEnd1()) ||
94 (dir == 2 && remote_end != session.getRemoteEnd2()))
97 (!gOpt.getNoNatOnce() && ((dir == 1 && !session.getSeen1()) ||
98 (dir == 2 && !session.getSeen2()))))
100 cLog.msg(Log::PRIO_NOTICE) << "listener(" << call_id << "/" << dir << ") setting remote host to "
103 session.setRemoteEnd1(remote_end);
105 session.setRemoteEnd2(remote_end);
107 if(!gOpt.getNat()) { // with nat enabled sync is not needed
108 SyncRtpCommand sc(call_id);
119 sock2->send_to(boost::asio::buffer(buf.getBuf(), buf.getLength()), session.getRemoteEnd2());
121 sock1->send_to(boost::asio::buffer(buf.getBuf(), buf.getLength()), session.getRemoteEnd1());
125 catch(std::exception &e)
127 cLog.msg(Log::PRIO_ERR) << "listener(" << call_id << "/" << dir << ") exiting because: " << e.what();
130 gCallIdQueue.push(call_id);
136 ListenerData() : sock1_(ios1_), sock2_(ios2_) {}
138 boost::asio::io_service ios1_;
139 boost::asio::io_service ios2_;
140 RtpSession::proto::socket sock1_;
141 RtpSession::proto::socket sock2_;
142 boost::thread* thread1_;
143 boost::thread* thread2_;
148 void listenerManager(void* p)
150 SyncQueue* queue_ = reinterpret_cast<SyncQueue*>(p);
152 std::map<std::string, ListenerData*> listenerMap;
157 std::string call_id = gCallIdQueue.front(); // waits for semaphor and returns next call_id
160 RtpSession& session = gRtpSessionTable.getSession(call_id);
161 if(!session.isComplete())
164 std::map<std::string, ListenerData*>::iterator it;
165 it = listenerMap.find(call_id);
166 if(it == listenerMap.end()) // listener Threads not existing yet
168 ListenerData* ld = new ListenerData();
170 ld->sock1_.open(session.getLocalEnd1().protocol());
171 ld->sock1_.bind(session.getLocalEnd1());
173 ld->sock2_.open(session.getLocalEnd2().protocol());
174 ld->sock2_.bind(session.getLocalEnd2());
176 ld->thread1_ = new boost::thread(boost::bind(listener, &(ld->sock1_), &(ld->sock2_), call_id, 1, queue_, &(ld->running1_)));
177 ld->thread2_ = new boost::thread(boost::bind(listener, &(ld->sock1_), &(ld->sock2_), call_id, 2, queue_, &(ld->running2_)));
179 std::pair<std::map<std::string, ListenerData*>::iterator, bool> ret;
180 ret = listenerMap.insert(std::map<std::string, ListenerData*>::value_type(call_id, ld));
184 if(!it->second->running1_ && !it->second->running2_)
186 cLog.msg(Log::PRIO_NOTICE) << "listenerManager both threads for '" << call_id << "' exited, cleaning up";
187 if(it->second->thread1_) {
188 it->second->thread1_->join();
189 delete it->second->thread1_;
191 if(it->second->thread2_) {
192 it->second->thread2_->join();
193 delete it->second->thread2_;
196 listenerMap.erase(it);
197 gRtpSessionTable.delSession(call_id);
200 // TODO: reinit if session changed
202 catch(std::exception &e)
204 cLog.msg(Log::PRIO_ERR) << "listenerManager restarting after exception: " << e.what();
205 usleep(500); // in case of an hard error don't block cpu (this is ugly)
208 cLog.msg(Log::PRIO_ERR) << "listenerManager exiting because of unknown reason";
211 void chrootAndDrop(string const& chrootdir, string const& username)
215 std::cerr << "this program has to be run as root in order to run in a chroot" << std::endl;
219 struct passwd *pw = getpwnam(username.c_str());
221 if(chroot(chrootdir.c_str()))
223 std::cerr << "can't chroot to " << chrootdir << std::endl;
226 std::cout << "we are in chroot jail (" << chrootdir << ") now" << std::endl;
228 if (initgroups(pw->pw_name, pw->pw_gid) || setgid(pw->pw_gid) || setuid(pw->pw_uid))
230 std::cerr << "can't drop to user " << username << " " << pw->pw_uid << ":" << pw->pw_gid << std::endl;
233 std::cout << "dropped user to " << username << " " << pw->pw_uid << ":" << pw->pw_gid << std::endl;
237 std::cerr << "unknown user " << username << std::endl;
252 // std::cout << "running in background now..." << std::endl;
255 // for (fd=getdtablesize();fd>=0;--fd) // close all file descriptors
256 for (fd=0;fd<=2;fd++) // close all file descriptors
258 fd=open("/dev/null",O_RDWR); // stdin
267 ThreadParam(SyncQueue & queue_,OptionConnectTo & connto_)
268 : queue(queue_),connto(connto_)
271 OptionConnectTo & connto;
274 void syncConnector(void* p)
276 ThreadParam* param = reinterpret_cast<ThreadParam*>(p);
278 SyncClient sc ( param->connto.host, param->connto.port);
282 void syncListener(SyncQueue * queue)
286 boost::asio::io_service io_service;
287 SyncTcpConnection::proto::resolver resolver(io_service);
288 SyncTcpConnection::proto::endpoint e;
289 if(gOpt.getLocalSyncAddr()!="")
291 SyncTcpConnection::proto::resolver::query query(gOpt.getLocalSyncAddr(), gOpt.getLocalSyncPort());
292 e = *resolver.resolve(query);
294 SyncTcpConnection::proto::resolver::query query(gOpt.getLocalSyncPort());
295 e = *resolver.resolve(query);
299 SyncServer server(io_service,e);
300 server.onConnect=boost::bind(syncOnConnect,_1);
301 queue->setSyncServerPtr(&server);
304 catch (std::exception& e)
306 std::string addr = gOpt.getLocalSyncAddr() == "" ? "*" : gOpt.getLocalSyncAddr();
307 cLog.msg(Log::PRIO_ERR) << "sync: cannot bind to " << addr << ":" << gOpt.getLocalSyncPort()
308 << " (" << e.what() << ")" << std::endl;
313 int main(int argc, char* argv[])
315 // std::cout << "anyrtpproxy" << std::endl;
316 if(!gOpt.parse(argc, argv))
322 cLog.setLogName("anyrtpproxy");
323 cLog.msg(Log::PRIO_NOTICE) << "anyrtpproxy started...";
325 std::ofstream pidFile;
326 if(gOpt.getPidFile() != "") {
327 pidFile.open(gOpt.getPidFile().c_str());
328 if(!pidFile.is_open()) {
329 std::cout << "can't open pid file" << std::endl;
334 chrootAndDrop(gOpt.getChrootDir(), gOpt.getUsername());
335 if(gOpt.getDaemonize())
338 if(pidFile.is_open()) {
339 pid_t pid = getpid();
344 SignalController sig;
350 boost::thread listenerManagerThread(boost::bind(listenerManager,&queue));
353 // #ifndef ANYTUN_NOSYNC
354 // boost::thread * syncListenerThread;
355 // if(gOpt.getLocalSyncPort() != "")
356 // syncListenerThread = new boost::thread(boost::bind(syncListener,&queue));
358 // std::list<boost::thread *> connectThreads;
359 // for(ConnectToList::iterator it = connect_to.begin() ;it != connect_to.end(); ++it) {
360 // ThreadParam * point = new ThreadParam(dev, *src, cl, queue,*it);
361 // connectThreads.push_back(new boost::thread(boost::bind(syncConnector,point)));
367 // pthread_t syncListenerThread;
369 // ConnectToList connect_to = gOpt.getConnectTo();
370 // ThreadParam p( queue,*(new OptionConnectTo()));
371 // if ( gOpt.getLocalSyncPort())
372 // pthread_create(&syncListenerThread, NULL, syncListener, &p);
374 // std::list<pthread_t> connectThreads;
375 // for(ConnectToList::iterator it = connect_to.begin() ;it != connect_to.end(); ++it)
377 // connectThreads.push_back(pthread_t());
378 // ThreadParam * point = new ThreadParam(queue,*it);
379 // pthread_create(& connectThreads.back(), NULL, syncConnector, point);
382 PortWindow port_window(gOpt.getRtpStartPort(),gOpt.getRtpEndPort());
383 CommandHandler cmd(queue, gOpt.getControlInterface().addr_, gOpt.getControlInterface().port_,port_window);