/* * anytun * * The secure anycast tunneling protocol (satp) defines a protocol used * for communication between any combination of unicast and anycast * tunnel endpoints. It has less protocol overhead than IPSec in Tunnel * mode and allows tunneling of every ETHER TYPE protocol (e.g. * ethernet, ip, arp ...). satp directly includes cryptography and * message authentication based on the methodes used by SRTP. It is * intended to deliver a generic, scaleable and secure solution for * tunneling and relaying of packets of any protocol. * * * Copyright (C) 2007 anytun.org * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 * as published by the Free Software Foundation. * * 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 (see the file COPYING included with this * distribution); if not, write to the Free Software Foundation, Inc., * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ #include #include #include "datatypes.h" #include "log.h" #include "buffer.h" #include "packet.h" #include "cypher.h" #include "authAlgo.h" #include "signalController.h" #include "packetSource.h" #include "tunDevice.h" sender_id_t my_sender_id_ = 23; u_int16_t local_port_ = 4444; string remote_addr_ = "127.0.0.1"; u_int16_t remote_port_ = 4444; string dev_type_ = "tap"; string ifconfig_param_1_ = "192.168.200.1"; string ifconfig_param_2_ = "255.255.255.0"; #define PAYLOAD_TYPE_TAP 0x6558 #define PAYLOAD_TYPE_TUN 0x0800 struct Param { TunDevice* dev; Cypher* c; AuthAlgo* a; PacketSource* src; }; void* sender(void* p) { Param* param = reinterpret_cast(p); seq_nr_t seq = 0; while(1) { Packet pack(1600); // read packet from device int len = param->dev->read(pack); pack.resizeBack(len); // add payload type if(param->dev->getType() == TunDevice::TYPE_TUN) pack.addPayloadType(PAYLOAD_TYPE_TUN); else if(param->dev->getType() == TunDevice::TYPE_TAP) pack.addPayloadType(PAYLOAD_TYPE_TAP); else pack.addPayloadType(0); // cypher the packet param->c->cypher(pack); // add header to packet pack.addHeader(my_sender_id_, seq); // calc auth_tag and add it to the packet auth_tag_t at = param->a->calc(pack); pack.addAuthTag(at); // send it out to remote host param->src->send(pack, remote_addr_, remote_port_); } pthread_exit(NULL); } void* receiver(void* p) { Param* param = reinterpret_cast(p); while(1) { string remote_host; u_int16_t remote_port; Packet pack(1600); // read packet from socket u_int32_t len = param->src->recv(pack, remote_host, remote_port); pack.resizeBack(len); pack.withPayloadType(true).withHeader(true).withAuthTag(true); // check auth_tag and remove it auth_tag_t at = pack.getAuthTag(); pack.removeAuthTag(); if(at != param->a->calc(pack)) continue; // compare sender_id and seq with window pack.removeHeader(); // decypher the packet param->c->cypher(pack); // check payload_type and remove it if((param->dev->getType() == TunDevice::TYPE_TUN && pack.getPayloadType() != PAYLOAD_TYPE_TUN) || (param->dev->getType() == TunDevice::TYPE_TAP && pack.getPayloadType() != PAYLOAD_TYPE_TAP)) continue; pack.removePayloadType(); // write it on the device param->dev->write(pack); } pthread_exit(NULL); } int main(int argc, char* argv[]) { std::cout << "anytun - secure anycast tunneling protocol" << std::endl; cLog.msg(Log::PRIO_NOTICE) << "anytun started..."; if(argc > 1) my_sender_id_ = atoi(argv[1]); if(argc > 2) local_port_ = atoi(argv[2]); if(argc > 3) remote_addr_ = argv[3]; if(argc > 4) remote_port_ = atoi(argv[4]); if(argc > 5) dev_type_ = argv[5]; if(argc > 6) ifconfig_param_1_ = argv[6]; if(argc > 7) ifconfig_param_2_ = argv[7]; SignalController sig; sig.init(); struct Param p; p.dev = new TunDevice(dev_type_.c_str(), ifconfig_param_1_.c_str(), ifconfig_param_2_.c_str()); p.c = new NullCypher(); p.a = new NullAuthAlgo(); p.src = new UDPPacketSource(local_port_); std::cout << "dev created (opened)" << std::endl; std::cout << "dev opened - actual name is '" << p.dev->getActualName() << "'" << std::endl; std::cout << "dev type is '" << p.dev->getTypeString() << "'" << std::endl; pthread_t senderThread; pthread_create(&senderThread, NULL, sender, &p); pthread_t receiverThread; pthread_create(&receiverThread, NULL, receiver, &p); int ret = sig.run(); pthread_cancel(senderThread); pthread_cancel(receiverThread); pthread_join(senderThread, NULL); pthread_join(receiverThread, NULL); delete p.dev; delete p.c; delete p.a; delete p.src; return ret; }