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) 2007-2008 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 version 3 as
21 * published by the Free Software Foundation.
23 * Anytun is distributed in the hope that it will be useful,
24 * but WITHOUT ANY WARRANTY; without even the implied warranty of
25 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
26 * GNU General Public License for more details.
28 * You should have received a copy of the GNU General Public License
29 * along with anytun. If not, see <http://www.gnu.org/licenses/>.
34 #include <boost/asio.hpp>
40 #include "../datatypes.h"
43 #include "../signalController.h"
44 #include "../buffer.h"
45 #include "connectionList.h"
46 #include "rtpSessionTable.h"
47 #include "syncRtpCommand.h"
48 #include "../syncQueue.h"
49 #include "../syncClient.h"
50 #include "syncOnConnect.hpp"
52 #include "../threadUtils.hpp"
54 #include "commandHandler.h"
55 #include "callIdQueue.h"
58 #include "portWindow.h"
62 #define MAX_PACKET_SIZE 1500
64 void listener(RtpSession::proto::socket* sock1, RtpSession::proto::socket* sock2, std::string call_id, int dir, SyncQueue* queue, bool* running)
66 cLog.msg(Log::PRIO_NOTICE) << "listener(" << call_id << "/" << dir << ") started";
70 Buffer buf(u_int32_t(MAX_PACKET_SIZE));
71 RtpSession::proto::endpoint remote_end;
74 buf.setLength(MAX_PACKET_SIZE);
77 len = 0;//sock1->recvFromNonBlocking(buf.getBuf(), buf.getLength(), remote_end, 1000);
79 len = 0; //sock2->recvFromNonBlocking(buf.getBuf(), buf.getLength(), remote_end, 1000);
82 RtpSession& session = gRtpSessionTable.getSession(call_id);
83 if(session.isDead()) {
84 cLog.msg(Log::PRIO_NOTICE) << "listener(" << call_id << "/" << dir << ") session is dead, exiting";
92 if((dir == 1 && remote_end != session.getRemoteEnd1()) ||
93 (dir == 2 && remote_end != session.getRemoteEnd2()))
96 (!gOpt.getNoNatOnce() && ((dir == 1 && !session.getSeen1()) ||
97 (dir == 2 && !session.getSeen2()))))
99 cLog.msg(Log::PRIO_NOTICE) << "listener(" << call_id << "/" << dir << ") setting remote host to "
102 session.setRemoteEnd1(remote_end);
104 session.setRemoteEnd2(remote_end);
106 if(!gOpt.getNat()) { // with nat enabled sync is not needed
107 SyncRtpCommand sc(call_id);
118 sock2->send_to(boost::asio::buffer(buf.getBuf(), buf.getLength()), session.getRemoteEnd2());
120 sock1->send_to(boost::asio::buffer(buf.getBuf(), buf.getLength()), session.getRemoteEnd1());
124 catch(std::exception &e)
126 cLog.msg(Log::PRIO_ERR) << "listener(" << call_id << "/" << dir << ") exiting because: " << e.what();
129 gCallIdQueue.push(call_id);
135 ListenerData() : sock1_(ios1_), sock2_(ios2_) {}
137 boost::asio::io_service ios1_;
138 boost::asio::io_service ios2_;
139 RtpSession::proto::socket sock1_;
140 RtpSession::proto::socket sock2_;
141 boost::thread* thread1_;
142 boost::thread* thread2_;
147 void listenerManager(void* p)
149 SyncQueue* queue_ = reinterpret_cast<SyncQueue*>(p);
151 std::map<std::string, ListenerData*> listenerMap;
156 std::string call_id = gCallIdQueue.front(); // waits for semaphor and returns next call_id
159 RtpSession& session = gRtpSessionTable.getSession(call_id);
160 if(!session.isComplete())
163 std::map<std::string, ListenerData*>::iterator it;
164 it = listenerMap.find(call_id);
165 if(it == listenerMap.end()) // listener Threads not existing yet
167 ListenerData* ld = new ListenerData();
169 ld->sock1_.open(session.getLocalEnd1().protocol());
170 ld->sock1_.bind(session.getLocalEnd1());
172 ld->sock2_.open(session.getLocalEnd2().protocol());
173 ld->sock2_.bind(session.getLocalEnd2());
175 ld->thread1_ = new boost::thread(boost::bind(listener, &(ld->sock1_), &(ld->sock2_), call_id, 1, queue_, &(ld->running1_)));
176 ld->thread2_ = new boost::thread(boost::bind(listener, &(ld->sock1_), &(ld->sock2_), call_id, 2, queue_, &(ld->running2_)));
178 std::pair<std::map<std::string, ListenerData*>::iterator, bool> ret;
179 ret = listenerMap.insert(std::map<std::string, ListenerData*>::value_type(call_id, ld));
183 if(!it->second->running1_ && !it->second->running2_)
185 cLog.msg(Log::PRIO_NOTICE) << "listenerManager both threads for '" << call_id << "' exited, cleaning up";
186 if(it->second->thread1_) {
187 it->second->thread1_->join();
188 delete it->second->thread1_;
190 if(it->second->thread2_) {
191 it->second->thread2_->join();
192 delete it->second->thread2_;
195 listenerMap.erase(it);
196 gRtpSessionTable.delSession(call_id);
199 // TODO: reinit if session changed
201 catch(std::exception &e)
203 cLog.msg(Log::PRIO_ERR) << "listenerManager restarting after exception: " << e.what();
204 usleep(500); // in case of an hard error don't block cpu (this is ugly)
207 cLog.msg(Log::PRIO_ERR) << "listenerManager exiting because of unknown reason";
210 void chrootAndDrop(string const& chrootdir, string const& username)
214 std::cerr << "this programm has to be run as root in order to run in a chroot" << std::endl;
218 struct passwd *pw = getpwnam(username.c_str());
220 if(chroot(chrootdir.c_str()))
222 std::cerr << "can't chroot to " << chrootdir << std::endl;
225 std::cout << "we are in chroot jail (" << chrootdir << ") now" << std::endl;
227 if (initgroups(pw->pw_name, pw->pw_gid) || setgid(pw->pw_gid) || setuid(pw->pw_uid))
229 std::cerr << "can't drop to user " << username << " " << pw->pw_uid << ":" << pw->pw_gid << std::endl;
232 std::cout << "dropped user to " << username << " " << pw->pw_uid << ":" << pw->pw_gid << std::endl;
236 std::cerr << "unknown user " << username << std::endl;
251 // std::cout << "running in background now..." << std::endl;
254 // for (fd=getdtablesize();fd>=0;--fd) // close all file descriptors
255 for (fd=0;fd<=2;fd++) // close all file descriptors
257 fd=open("/dev/null",O_RDWR); // stdin
266 ThreadParam(SyncQueue & queue_,OptionConnectTo & connto_)
267 : queue(queue_),connto(connto_)
270 OptionConnectTo & connto;
273 void syncConnector(void* p)
275 ThreadParam* param = reinterpret_cast<ThreadParam*>(p);
277 SyncClient sc ( param->connto.host, param->connto.port);
281 void syncListener(SyncQueue * queue)
285 boost::asio::io_service io_service;
286 SyncTcpConnection::proto::resolver resolver(io_service);
287 SyncTcpConnection::proto::endpoint e;
288 if(gOpt.getLocalSyncAddr()!="")
290 SyncTcpConnection::proto::resolver::query query(gOpt.getLocalSyncAddr(), gOpt.getLocalSyncPort());
291 e = *resolver.resolve(query);
293 SyncTcpConnection::proto::resolver::query query(gOpt.getLocalSyncPort());
294 e = *resolver.resolve(query);
298 SyncServer server(io_service,e);
299 server.onConnect=boost::bind(syncOnConnect,_1);
300 queue->setSyncServerPtr(&server);
303 catch (std::exception& e)
305 std::string addr = gOpt.getLocalSyncAddr() == "" ? "*" : gOpt.getLocalSyncAddr();
306 cLog.msg(Log::PRIO_ERR) << "sync: cannot bind to " << addr << ":" << gOpt.getLocalSyncPort()
307 << " (" << e.what() << ")" << std::endl;
312 int main(int argc, char* argv[])
314 // std::cout << "anyrtpproxy" << std::endl;
315 if(!gOpt.parse(argc, argv))
321 cLog.setLogName("anyrtpproxy");
322 cLog.msg(Log::PRIO_NOTICE) << "anyrtpproxy started...";
324 std::ofstream pidFile;
325 if(gOpt.getPidFile() != "") {
326 pidFile.open(gOpt.getPidFile().c_str());
327 if(!pidFile.is_open()) {
328 std::cout << "can't open pid file" << std::endl;
333 chrootAndDrop(gOpt.getChrootDir(), gOpt.getUsername());
334 if(gOpt.getDaemonize())
337 if(pidFile.is_open()) {
338 pid_t pid = getpid();
343 SignalController sig;
349 boost::thread listenerManagerThread(boost::bind(listenerManager,&queue));
352 // #ifndef ANYTUN_NOSYNC
353 // boost::thread * syncListenerThread;
354 // if(gOpt.getLocalSyncPort() != "")
355 // syncListenerThread = new boost::thread(boost::bind(syncListener,&queue));
357 // std::list<boost::thread *> connectThreads;
358 // for(ConnectToList::iterator it = connect_to.begin() ;it != connect_to.end(); ++it) {
359 // ThreadParam * point = new ThreadParam(dev, *src, cl, queue,*it);
360 // connectThreads.push_back(new boost::thread(boost::bind(syncConnector,point)));
366 // pthread_t syncListenerThread;
368 // ConnectToList connect_to = gOpt.getConnectTo();
369 // ThreadParam p( queue,*(new OptionConnectTo()));
370 // if ( gOpt.getLocalSyncPort())
371 // pthread_create(&syncListenerThread, NULL, syncListener, &p);
373 // std::list<pthread_t> connectThreads;
374 // for(ConnectToList::iterator it = connect_to.begin() ;it != connect_to.end(); ++it)
376 // connectThreads.push_back(pthread_t());
377 // ThreadParam * point = new ThreadParam(queue,*it);
378 // pthread_create(& connectThreads.back(), NULL, syncConnector, point);
381 PortWindow port_window(gOpt.getRtpStartPort(),gOpt.getRtpEndPort());
382 CommandHandler cmd(queue, gOpt.getControlInterface().addr_, gOpt.getControlInterface().port_,port_window);