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/*
* Copyright (C) 2004-2012 Savoir-Faire Linux Inc.
* Author: Alexandre Savard <alexandre.savard@savoirfairelinux.com>
* Author: Pierre-Luc Bacon <pierre-luc.bacon@savoirfairelinux.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
* 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; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Additional permission under GNU GPL version 3 section 7:
*
* If you modify this program, or any covered work, by linking or
* combining it with the OpenSSL project's OpenSSL library (or a
* modified version of that library), containing parts covered by the
* terms of the OpenSSL or SSLeay licenses, Savoir-Faire Linux Inc.
* grants you additional permission to convey the resulting work.
* Corresponding Source for a non-source form of such a combination
* shall include the source code for the parts of OpenSSL used as well
* as that of the covered work.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include "audio_zrtp_session.h"
#include "zrtp_session_callback.h"
#include "sip/sipcall.h"
#include "logger.h"
#include "manager.h"
#include "fileutils.h"
#include <libzrtpcpp/zrtpccrtp.h>
#include <libzrtpcpp/ZrtpQueue.h>
#include <libzrtpcpp/ZrtpUserCallback.h>
#include <ccrtp/rtp.h>
namespace sfl {
AudioZrtpSession::AudioZrtpSession(SIPCall &call, const std::string &zidFilename) :
ost::SymmetricZRTPSession(ost::InetHostAddress(call.getLocalIp().c_str()), call.getLocalAudioPort())
, AudioRtpSession(call, *this)
, zidFilename_(zidFilename)
{
initializeZid();
DEBUG("Setting new RTP session with destination %s:%d",
call_.getLocalIp().c_str(), call_.getLocalAudioPort());
audioRtpRecord_.callId_ = call_.getCallId();
}
std::vector<long>
AudioZrtpSession::getSocketDescriptors() const
{
std::vector<long> result;
result.push_back(dso->getRecvSocket());
result.push_back(cso->getRecvSocket());
return result;
}
void AudioZrtpSession::initializeZid()
{
if (zidFilename_.empty())
throw ZrtpZidException("zid filename empty");
const std::string cache_home(XDG_CACHE_HOME);
std::string zidCompleteFilename;
if (not cache_home.empty()) {
zidCompleteFilename = cache_home + DIR_SEPARATOR_STR + zidFilename_;
} else {
zidCompleteFilename = fileutils::get_home_dir() + DIR_SEPARATOR_STR +
".cache" + DIR_SEPARATOR_STR + PACKAGE +
DIR_SEPARATOR_STR + zidFilename_;
}
if (initialize(zidCompleteFilename.c_str()) >= 0) {
setEnableZrtp(true);
setUserCallback(new ZrtpSessionCallback(call_));
return;
}
DEBUG("Initialization from ZID file failed. Trying to remove...");
if (remove(zidCompleteFilename.c_str()) != 0)
throw ZrtpZidException("zid file deletion failed");
if (initialize(zidCompleteFilename.c_str()) < 0)
throw ZrtpZidException("zid initialization failed");
return;
}
void AudioZrtpSession::sendMicData()
{
int compSize = processDataEncode();
// if no data return
if (compSize == 0)
return;
// Increment timestamp for outgoing packet
timestamp_ += timestampIncrement_;
// this step is only needed for ZRTP
queue_.putData(timestamp_, getMicDataEncoded(), compSize);
// putData puts the data on RTP queue, sendImmediate bypasses this queue
queue_.sendImmediate(timestamp_, getMicDataEncoded(), compSize);
}
int AudioZrtpSession::getIncrementForDTMF() const
{
return 160;
}
void AudioZrtpSession::startReceiveThread()
{
ost::SymmetricZRTPSession::start();
}
}
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