int RtspClientSession::handle_setup(RtspClientConnection * rcc,
std::string & urlPreSuffix,
std::string & urlSuffix,
std::string & fullRequestStr){
// "urlPreSuffix" is empty and "urlSuffix" is the session (stream) name, or
// "urlPreSuffix" concatenated with "urlSuffix" (with "/" inbetween) is the session (stream) name.
//rtsp://192.168.20.136:5000/xxx666/trackID=0 RTSP/1.0
std::string streamName = urlPreSuffix;
std::string trackId = urlSuffix;
if(urlPreSuffix.empty()){
streamName = urlSuffix;
}
if(m_mediaSession){
if (m_mediaSession->StreamName() != streamName){
return rcc->handleCmd_bad();
}
}
else{
m_mediaSession = rcc->get_rtsp()->getAndDetachMediaSession(streamName);
}
if (!m_mediaSession){
return rcc->handleCmd_notFound();
}
if (trackId.empty() && m_mediaSession->SubSessionCount() != 1){
return rcc->handleCmd_bad();
}
MediaSubSession * subsession = NULL;
if (trackId.empty()){
subsession = m_mediaSession->GetSubSession(0);
}
else{
subsession = m_mediaSession->Lookup(trackId);
}
if (!subsession){
return rcc->handleCmd_notFound();
}
int transMode = RTP_UDP;
std::string strDstAdder;
uchar dstTTL = 255;
uint rtpPort = 0; //UDP
uint rtcpPort = 1; //UDP
uchar rtpChannel = 0xff; //tcp
uchar rtcpChannel = 0xff; //tcp
parseTransportHeader(fullRequestStr, transMode, strDstAdder, dstTTL,
rtpPort, rtcpPort, rtpChannel, rtcpChannel);
if (transMode == RAW_UDP){
rcc->handleCmd_notSupported();
return -1;
}
if (transMode == RTP_TCP && rtpChannel == 0xff){
// An anomolous situation, caused by a buggy client. Either:
// 1/ TCP streaming was requested, but with no "interleaving=" fields. (QuickTime Player sometimes does this.), or
// 2/ TCP streaming was not requested, but we're doing RTSP-over-HTTP tunneling (which implies TCP streaming).
rtpChannel = m_tcpStreamCount++;
rtcpChannel = m_tcpStreamCount++;
}
if (fullRequestStr.find("x-playNow:") != std::string::npos){
rcc->handleCmd_notSupported();
return -1;
}
ipaddr dstAddr = {{0},0};
if(!strDstAdder.empty()){
strncpy(dstAddr.ip, strDstAdder.c_str(), sizeof(dstAddr.ip));
}
else{
dstAddr = rcc->get_peeraddr();
}
const ipaddr & localAddr = rcc->get_localaddr();
uint dstIp = ntohl(inet_addr(dstAddr.ip ));
std::string response;
if (transMode == RTP_TCP){
subsession->GetTcpParam((void*)rcc, rtpChannel, rtcpChannel, dstTTL);
append(response,
"RTSP/1.0 200 OK\r\n"
"CSeq: %s\r\n"
"%s"
"Transport: RTP/AVP/TCP;unicast;destination=%s;source=%s;interleaved=%d-%d\r\n"
"Session: %s\r\n\r\n",
rcc->getSeq().c_str(),
dateStr().c_str(),
dstAddr.ip, localAddr.ip,
rtpChannel, rtcpChannel,
m_sessionId.c_str());
}
else{
uint serverRtpPort = 0;
uint serverRtcpPort = 0;
subsession->GetUdpParam(rtpPort, rtcpPort, dstIp, serverRtpPort, serverRtcpPort);
append(response,
"RTSP/1.0 200 OK\r\n"
"CSeq: %s\r\n"
"%s"
"Transport: RTP/AVP;unicast;source=%s;client_port=%d-%d;server_port=%d-%d\r\n"
"Session: %s\r\n\r\n",
rcc->getSeq().c_str(),
dateStr().c_str(),
localAddr.ip,
rtpPort, rtcpPort, serverRtpPort, serverRtcpPort,
m_sessionId.c_str());
}
debug_log("S->C : %s\n", response.c_str());
rcc->post_send(response.c_str(), response.length());
return 0;
}
void RTSPServer::RTSPClientSession
::handleCmd_SETUP(char const* cseq,
char const* urlPreSuffix, char const* urlSuffix,
char const* fullRequestStr) {
// "urlPreSuffix" should be the session (stream) name, and
// "urlSuffix" should be the subsession (track) name.
char const* streamName = urlPreSuffix;
char const* trackId = urlSuffix;
// Check whether we have existing session state, and, if so, whether it's
// for the session that's named in "streamName". (Note that we don't
// support more than one concurrent session on the same client connection.) #####
if (fOurServerMediaSession != NULL
&& strcmp(streamName, fOurServerMediaSession->streamName()) != 0) {
fOurServerMediaSession = NULL;
}
if (fOurServerMediaSession == NULL) {
// Set up this session's state.
// Look up the "ServerMediaSession" object for the specified stream:
if (streamName[0] != '\0' ||
fOurServer.lookupServerMediaSession("") != NULL) { // normal case
} else { // weird case: there was no track id in the URL
streamName = urlSuffix;
trackId = NULL;
}
fOurServerMediaSession = fOurServer.lookupServerMediaSession(streamName);
if (fOurServerMediaSession == NULL) {
handleCmd_notFound(cseq);
return;
}
fOurServerMediaSession->incrementReferenceCount();
// Set up our array of states for this session's subsessions (tracks):
reclaimStreamStates();
ServerMediaSubsessionIterator iter(*fOurServerMediaSession);
for (fNumStreamStates = 0; iter.next() != NULL; ++fNumStreamStates) {}
fStreamStates = new struct streamState[fNumStreamStates];
iter.reset();
ServerMediaSubsession* subsession;
for (unsigned i = 0; i < fNumStreamStates; ++i) {
subsession = iter.next();
fStreamStates[i].subsession = subsession;
fStreamStates[i].streamToken = NULL; // for now; reset by SETUP later
}
}
// Look up information for the specified subsession (track):
ServerMediaSubsession* subsession = NULL;
unsigned streamNum;
if (trackId != NULL && trackId[0] != '\0') { // normal case
for (streamNum = 0; streamNum < fNumStreamStates; ++streamNum) {
subsession = fStreamStates[streamNum].subsession;
if (subsession != NULL && strcmp(trackId, subsession->trackId()) == 0) break;
}
if (streamNum >= fNumStreamStates) {
// The specified track id doesn't exist, so this request fails:
handleCmd_notFound(cseq);
return;
}
} else {
// Weird case: there was no track id in the URL.
// This works only if we have only one subsession:
if (fNumStreamStates != 1) {
handleCmd_bad(cseq);
return;
}
streamNum = 0;
subsession = fStreamStates[streamNum].subsession;
}
// ASSERT: subsession != NULL
// Look for a "Transport:" header in the request string,
// to extract client parameters:
StreamingMode streamingMode;
char* streamingModeString = NULL; // set when RAW_UDP streaming is specified
char* clientsDestinationAddressStr;
u_int8_t clientsDestinationTTL;
portNumBits clientRTPPortNum, clientRTCPPortNum;
unsigned char rtpChannelId, rtcpChannelId;
parseTransportHeader(fullRequestStr, streamingMode, streamingModeString, fIsMulticast,
clientsDestinationAddressStr, clientsDestinationTTL,
clientRTPPortNum, clientRTCPPortNum,
rtpChannelId, rtcpChannelId);
if (streamingMode == RTP_TCP && rtpChannelId == 0xFF) {
// TCP streaming was requested, but with no "interleaving=" fields.
// (QuickTime Player sometimes does this.) Set the RTP and RTCP channel ids to
// proper values:
rtpChannelId = fTCPStreamIdCount; rtcpChannelId = fTCPStreamIdCount+1;
}
fTCPStreamIdCount += 2;
Port clientRTPPort(clientRTPPortNum);
Port clientRTCPPort(clientRTCPPortNum);
// Next, check whether a "Range:" header is present in the request.
// This isn't legal, but some clients do this to combine "SETUP" and "PLAY":
double rangeStart = 0.0, rangeEnd = 0.0;
fStreamAfterSETUP = parseRangeHeader(fullRequestStr, rangeStart, rangeEnd) ||
parsePlayNowHeader(fullRequestStr);
// Then, get server parameters from the 'subsession':
int tcpSocketNum = streamingMode == RTP_TCP ? fClientSocket : -1;
netAddressBits destinationAddress = 0;
u_int8_t destinationTTL = 5;
#ifdef RTSP_ALLOW_CLIENT_DESTINATION_SETTING
if (clientsDestinationAddressStr != NULL) {
// Use the client-provided "destination" address.
// Note: This potentially allows the server to be used in denial-of-service
// attacks, so don't enable this code unless you're sure that clients are
// trusted.
destinationAddress = our_inet_addr(clientsDestinationAddressStr);
}
// Also use the client-provided TTL.
destinationTTL = clientsDestinationTTL;
#endif
delete[] clientsDestinationAddressStr;
Port serverRTPPort(0);
Port serverRTCPPort(0);
subsession->getStreamParameters(fOurSessionId, fClientAddr.sin_addr.s_addr,
clientRTPPort, clientRTCPPort,
tcpSocketNum, rtpChannelId, rtcpChannelId,
destinationAddress, destinationTTL, fIsMulticast,
serverRTPPort, serverRTCPPort,
fStreamStates[streamNum].streamToken);
struct in_addr destinationAddr; destinationAddr.s_addr = destinationAddress;
char* destAddrStr = strDup(our_inet_ntoa(destinationAddr));
struct sockaddr_in sourceAddr; SOCKLEN_T namelen = sizeof sourceAddr;
getsockname(fClientSocket, (struct sockaddr*)&sourceAddr, &namelen);
char* sourceAddrStr = strDup(our_inet_ntoa(sourceAddr.sin_addr));
if (fIsMulticast) {
switch (streamingMode) {
case RTP_UDP:
snprintf((char*)fResponseBuffer, sizeof fResponseBuffer,
"RTSP/1.0 200 OK\r\n"
"CSeq: %s\r\n"
"%s"
"Transport: RTP/AVP;multicast;destination=%s;source=%s;port=%d-%d;ttl=%d\r\n"
"Session: %08X\r\n\r\n",
cseq,
dateHeader(),
destAddrStr, sourceAddrStr, ntohs(serverRTPPort.num()), ntohs(serverRTCPPort.num()), destinationTTL,
fOurSessionId);
break;
case RTP_TCP:
// multicast streams can't be sent via TCP
handleCmd_unsupportedTransport(cseq);
break;
case RAW_UDP:
snprintf((char*)fResponseBuffer, sizeof fResponseBuffer,
"RTSP/1.0 200 OK\r\n"
"CSeq: %s\r\n"
"%s"
"Transport: %s;multicast;destination=%s;source=%s;port=%d;ttl=%d\r\n"
"Session: %08X\r\n\r\n",
cseq,
dateHeader(),
streamingModeString, destAddrStr, sourceAddrStr, ntohs(serverRTPPort.num()), destinationTTL,
fOurSessionId);
break;
}
} else {
switch (streamingMode) {
case RTP_UDP: {
snprintf((char*)fResponseBuffer, sizeof fResponseBuffer,
"RTSP/1.0 200 OK\r\n"
"CSeq: %s\r\n"
"%s"
"Transport: RTP/AVP;unicast;destination=%s;source=%s;client_port=%d-%d;server_port=%d-%d\r\n"
"Session: %08X\r\n\r\n",
cseq,
dateHeader(),
destAddrStr, sourceAddrStr, ntohs(clientRTPPort.num()), ntohs(clientRTCPPort.num()), ntohs(serverRTPPort.num()), ntohs(serverRTCPPort.num()),
fOurSessionId);
break;
}
case RTP_TCP: {
snprintf((char*)fResponseBuffer, sizeof fResponseBuffer,
"RTSP/1.0 200 OK\r\n"
"CSeq: %s\r\n"
"%s"
"Transport: RTP/AVP/TCP;unicast;destination=%s;source=%s;interleaved=%d-%d\r\n"
"Session: %08X\r\n\r\n",
cseq,
dateHeader(),
destAddrStr, sourceAddrStr, rtpChannelId, rtcpChannelId,
fOurSessionId);
break;
}
case RAW_UDP: {
snprintf((char*)fResponseBuffer, sizeof fResponseBuffer,
"RTSP/1.0 200 OK\r\n"
"CSeq: %s\r\n"
"%s"
"Transport: %s;unicast;destination=%s;source=%s;client_port=%d;server_port=%d\r\n"
"Session: %08X\r\n\r\n",
cseq,
dateHeader(),
streamingModeString, destAddrStr, sourceAddrStr, ntohs(clientRTPPort.num()), ntohs(serverRTPPort.num()),
fOurSessionId);
break;
}
}
}
delete[] destAddrStr; delete[] sourceAddrStr; delete[] streamingModeString;
}
