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121 lines
4.1 KiB
121 lines
4.1 KiB
/*
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* Copyright (C) 2002-2003 Fhg Fokus
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*
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* This file is part of SEMS, a free SIP media server.
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*
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* SEMS is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version. This program is released under
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* the GPL with the additional exemption that compiling, linking,
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* and/or using OpenSSL is allowed.
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*
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* For a license to use the SEMS software under conditions
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* other than those described here, or to purchase support for this
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* software, please contact iptel.org by e-mail at the following addresses:
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* info@iptel.org
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*
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* SEMS 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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*
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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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "AmStunServer.h"
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#include "AmRtpSocket.h"
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#include "sip/ip_util.h"
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#include "log.h"
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#include <netinet/in.h>
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#include <string>
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#include <vector>
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using std::string;
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using std::vector;
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void AmStunServer::recvStun(unsigned char* buffer, size_t len,
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AmRtpSocket* socket, sockaddr_storage* addr)
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{
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AmStunPacket *stun = AmStunPacket::parse(buffer, len);
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AmStunPacket::Type type = stun->getType();
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AmStunPacket::Method method = stun->getMethod();
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// If it is a binding request
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if (type==AmStunPacket::Request && method==AmStunPacket::Binding){
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DWORD len = 0;
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// Create response
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AmStunPacket* resp = stun->createResponse();
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// Add received xor mapped addres
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resp->addXorAddressAttribute(addr);
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// TODO: Check incoming request username attribute value starts with l_ice_username+":"
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// Create response
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DWORD size = resp->getSize();
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unsigned char* aux = (unsigned char*)malloc(size);
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memset(aux, 0, size);
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// Check if we have local password
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if (!l_ice_password.empty())
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len = resp->authenticatedFingerPrint(aux, size, l_ice_password.c_str());
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else
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//Do not authenticate
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len = resp->nonAuthenticatedFingerPrint(aux, size);
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// Send it
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DBG("Sending STUN packet to %s:%u",
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am_inet_ntop(addr).c_str(), am_get_port(addr));
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socket->send(aux, len, addr);
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// Clean memory
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free(aux);
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// Clean response
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delete(resp);
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// Rewrite remote address if necessary
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if (stun->hasAttribute(AmStunPacket::Attribute::UseCandidate)) {
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if (!(am_inet_ntop(addr) == socket->getRemoteAddress() &&
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am_get_port(addr) == socket->getRemotePort())) {
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ERROR("Setting remote address based on STUN");
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socket->setRemoteAddress(am_inet_ntop(addr), am_get_port(addr));
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}
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socket->onStunConnected(addr);
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}
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}
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delete(stun);
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}
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AmIceCandidate* AmStunServer::getLocalIceCandidates(AmRtpSocket* socket,
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const string& foundation,
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bool rtcp)
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{
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return new AmIceCandidate(
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foundation,
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rtcp?2:1,
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socket->isUdp()?"UDP":"TCP",
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socket->getLocalAddress(),
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socket->getLocalPort());
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}
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//TODO: Don't deal with SDP. Rename to:
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// getLocalStunCredentials(string& username, string& password) {
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// username = getLocalStunUsername();
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// password = getLocalStunPassword();
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// return;
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//}
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void AmStunServer::getLocalIceDescription(SdpMedia& m,
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const string& foundation,
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AmRtpSocket* rtp_socket,
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AmRtpSocket* rtcp_socket)
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{
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m.iceCandidates.push_back(getLocalIceCandidates(rtp_socket, foundation,
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false));
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if (rtcp_socket)
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m.iceCandidates.push_back(getLocalIceCandidates(rtcp_socket, foundation,
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true));
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}
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