windows-nt/Source/XPSP1/NT/enduser/netmeeting/av/rrcm/rtp/rtpsess.cpp

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2020-09-26 03:20:57 -05:00
// RTPSink.cpp : Implementation of CRTPSession
#include "stdafx.h"
#include <qossp.h>
#include "irtp.h"
#include "rtp.h"
#include "RTPSess.h"
//#include "rtpsink.h"
//#include "RTPMS.h"
//#include "RTPSamp.h"
#include "thread.h"
#include <rrcm.h>
#define DEFAULT_RTPBUF_SIZE 1500
#define IPPORT_FIRST_DYNAMIC 49152
#define IPPORT_FIRST_DYNAMIC_END (IPPORT_FIRST_DYNAMIC + 200)
#define IPPORT_FIRST_DYNAMIC_BEGIN (IPPORT_FIRST_DYNAMIC_END + 256)
// Port number allocation starts at IPPORT_FIRST_DYNAMIC_BEGIN.
// Everytime a port number is allocated we decrease g_alport, until
// we reach IPPORT_FIRST_DYNAMIC_END. We then reset it back to its
// original value (IPPORT_FIRST_DYNAMIC_BEGIN) and start this process
// all over again. This way we will avoid reusing the same port
// numbers between sessions.
u_short g_alport = IPPORT_FIRST_DYNAMIC_BEGIN;
void __cdecl RRCMNotification(int,DWORD_PTR,DWORD_PTR,DWORD_PTR);
#define IsMulticast(p) ((p->sin_addr.S_un.S_un_b.s_b1 & 0xF0) == 0xE0)
BOOL CRTP::m_WSInitialized = 0;
STDMETHODIMP CRTP::OpenSession(
UINT sessionId, // client specified unique identifier for the session
DWORD flags, // SESSIONF_SEND, SESSIONF_RECV, SESSIONF_MULTICAST etc.
BYTE *localAddr,
UINT cbAddr,
IRTPSession **ppIRTP) // [output] pointer to RTPSession
{
// the session is named by the sessionId
CRTPSession *pRTPSess ;
HRESULT hr= E_FAIL;
UINT mediaId = flags & (SESSIONF_AUDIO | SESSIONF_VIDEO);
EnterCriticalSection(&g_CritSect);
for (pRTPSess= CRTPSession::m_pSessFirst; pRTPSess; pRTPSess = pRTPSess->m_pSessNext ) {
// check for existing session of the same media type
// if the sessionId is not zero, also check for matching session id
if (sessionId == pRTPSess->m_sessionId)
if (mediaId == pRTPSess->m_mediaId)
break;
// if the local address or remote address is not NULL, search for an exising RTP session bound to
// the same address
// TODO
}
if (!pRTPSess)
{
if (!(flags & SESSIONF_EXISTING)) {
// create the session
ObjRTPSession *pObj;
DEBUGMSG(ZONE_DP,("Creating new RTP session\n"));
hr = ObjRTPSession::CreateInstance(&pObj);
if (hr == S_OK) {
pRTPSess = pObj; // pointer conversion
hr = pRTPSess->Initialize(sessionId, mediaId,localAddr,cbAddr);
if (hr != S_OK)
delete pObj;
}
}
else
hr = E_FAIL; // matching session does not exist
} else {
DEBUGMSG(ZONE_DP,("Reusing RTP session\n"));
hr = S_OK;
}
if (hr == S_OK) {
hr = ((IRTPSession *)pRTPSess)->QueryInterface(IID_IRTPSession,(void **) ppIRTP);
}
LeaveCriticalSection(&g_CritSect);
return hr;
}
CRTPSession *CRTPSession::m_pSessFirst = NULL;
/////////////////////////////////////////////////////////////////////////////
// CRTPSession
CRTPSession::CRTPSession()
: m_hRTPSession(NULL), m_uMaxPacketSize(1500),m_nBufsPosted(0),m_pRTPCallback(NULL),
m_fSendingSync(FALSE)
{
ZeroMemory(&m_sOverlapped,sizeof(m_sOverlapped));
ZeroMemory(&m_ss, sizeof(m_ss));
ZeroMemory(&m_rs, sizeof(m_rs));
m_sOverlapped.hEvent = (WSAEVENT)this;
}
/*
HRESULT CRTPSession::GetLocalAddress(
unsigned char *sockaddr,
UINT *paddrlen)
{
if (m_pRTPSess && *paddrlen >= sizeof(SOCKADDR_IN))
{
*paddrlen = sizeof(SOCKADDR_IN);
CopyMemory(sockaddr, m_pRTPSess->GetLocalAddress(), *paddrlen);
}
}
*/
HRESULT
CRTPSession::FinalRelease()
{
CRTPPacket1 *pRTPPacket;
// remove myself from the session list
EnterCriticalSection(&g_CritSect);
if (m_pSessFirst == this)
m_pSessFirst = m_pSessNext;
else {
CRTPSession *pRTPSess = m_pSessFirst;
while (pRTPSess && pRTPSess->m_pSessNext != this) {
pRTPSess = pRTPSess->m_pSessNext;
}
if (pRTPSess)
pRTPSess->m_pSessNext = m_pSessNext;
}
LeaveCriticalSection(&g_CritSect);
if (m_rtpsock) {
delete m_rtpsock;
m_rtpsock = NULL;
}
// BUGBUG: in case the buffers have not been canceled yet (an error case),
// they should complete now with WSA_OPERATION_ABORTED
// or WSAEINTR. This happens in the context of the RecvThread
if (m_nBufsPosted != 0)
Sleep(500); // time for APCs to be processed in RecvThread
// close the RTP session. Also ask RRCM to close the rtcp socket if its WS2
// because that is a more reliable way of cleaning up overlapped recvs than
// sending loopback packets.
CloseRTPSession (m_hRTPSession, NULL, TRUE );
if (m_rtcpsock) {
delete m_rtcpsock;
m_rtcpsock = NULL;
}
m_hRTPSession = 0;
// free receive buffers
while (m_FreePkts.Get(&pRTPPacket))
{
delete pRTPPacket;
}
return S_OK;
}
HRESULT CRTPSession::CreateRecvRTPStream(DWORD ssrc, IRTPRecv **ppIRTPRecv)
{
HRESULT hr;
Lock();
if (ssrc != 0)
return E_NOTIMPL;
#if 0
ObjRTPRecvSource *pRecvS;
hr = ObjRTPMediaStream::CreateInstance(&pMS);
if (SUCCEEDED(hr))
{
pMS->AddRef();
pMS->Init(this, m_mediaId);
hr = pMS->QueryInterface(IID_IRTPMediaStream, (void**)ppIRTPMediaStream);
pMS->Release();
}
#else
*ppIRTPRecv = this;
(*ppIRTPRecv)->AddRef();
hr = S_OK;
#endif
Unlock();
return hr;
}
ULONG GetRandom()
{
return GetTickCount();
}
HRESULT CRTPSession::Initialize(UINT sessionId, UINT mediaId, BYTE *pLocalAddr, UINT cbAddr)
{
DWORD APIstatus;
HRESULT hr = E_OUTOFMEMORY;
char tmpBfr[MAX_COMPUTERNAME_LENGTH + 1];
DWORD tmpBfrLen = sizeof(tmpBfr);
SDES_DATA sdesInfo[3];
ENCRYPT_INFO encryptInfo;
SOCKADDR_IN *pSockAddr;
m_sessionId = sessionId;
m_mediaId = mediaId;
m_rtpsock = new UDPSOCKET();
m_rtcpsock = new UDPSOCKET();
if (!m_rtpsock || !m_rtcpsock)
goto ERROR_EXIT;
if(!m_rtpsock->NewSock() || !m_rtcpsock->NewSock())
{
goto ERROR_EXIT;
}
// if the local address is specified do a bind on the sockets
if (pLocalAddr) {
// setup both channels for the current local address
hr = SetLocalAddress(pLocalAddr,cbAddr);
if (hr != S_OK)
goto ERROR_EXIT;
}
/*
// if the remote address is specified make a note of it
SetRemoteAddresses(pChanDesc->pRemoteAddr, pChanDesc->pRemoteRTCPAddr);
*/
// init send state
memset (&m_ss.sendStats,0,sizeof(m_ss.sendStats));
// init RTP send header
// time stamp and marker bit have to specified per packet
m_ss.hdr.p = 0; // no padding needed
m_ss.hdr.x = 0; // no extensions
m_ss.hdr.cc = 0; // no contributing sources
m_ss.hdr.seq = (WORD)GetRandom();
m_clockRate = (m_mediaId == SESSIONF_VIDEO ? 90000 : 8000); // typically 8KHz for audio
m_ss.hdr.pt = 0;
// Initialize list of overlapped structs
// build a Cname
memcpy(tmpBfr,"CName",6);
GetComputerName(tmpBfr,&tmpBfrLen);
// build the SDES information
sdesInfo[0].dwSdesType = 1;
memcpy (sdesInfo[0].sdesBfr, tmpBfr, strlen(tmpBfr)+1);
sdesInfo[0].dwSdesLength = strlen(sdesInfo[0].sdesBfr);
sdesInfo[0].dwSdesFrequency = 100;
sdesInfo[0].dwSdesEncrypted = 0;
// Build a Name
tmpBfrLen = sizeof(tmpBfr);
memcpy(tmpBfr,"UserName",9);
GetUserName(tmpBfr,&tmpBfrLen);
sdesInfo[1].dwSdesType = 2;
memcpy (sdesInfo[1].sdesBfr, tmpBfr, strlen(tmpBfr)+1);
sdesInfo[1].dwSdesLength = strlen(sdesInfo[1].sdesBfr);
sdesInfo[1].dwSdesFrequency = 25;
sdesInfo[1].dwSdesEncrypted = 0;
// end of SDES list
sdesInfo[2].dwSdesType = 0;
pSockAddr = m_rtcpsock->GetRemoteAddress();
#ifdef DEBUG
if (pSockAddr->sin_addr.s_addr == INADDR_ANY)
DEBUGMSG(ZONE_DP,("Null dest RTCP addr\n"));
#endif
// Create the RTP/RTCP session
m_hRTPSession = CreateRTPSession(
(m_rtpsock->GetSock()),
(m_rtcpsock->GetSock()),
(LPVOID)pSockAddr,
(pSockAddr->sin_addr.s_addr == INADDR_ANY)? 0 : sizeof(SOCKADDR_IN),
sdesInfo,
(DWORD)m_clockRate,
&encryptInfo,
0,
(PRRCM_EVENT_CALLBACK)RRCMNotification, // callback function
(DWORD_PTR) this, // callback info
RTCP_ON|H323_CONFERENCE,
0, //rtp session bandwidth
&APIstatus);
if (m_hRTPSession == NULL)
{
DEBUGMSG(ZONE_DP,("Couldnt create RRCM session\n"));
hr = GetLastError();
goto ERROR_EXIT;
}
m_Qos.SendingFlowspec.ServiceType = SERVICETYPE_NOTRAFFIC;
m_Qos.SendingFlowspec.TokenRate = QOS_NOT_SPECIFIED;
m_Qos.SendingFlowspec.TokenBucketSize = QOS_NOT_SPECIFIED;
m_Qos.SendingFlowspec.PeakBandwidth = QOS_NOT_SPECIFIED;
m_Qos.SendingFlowspec.Latency = QOS_NOT_SPECIFIED;
m_Qos.SendingFlowspec.DelayVariation = QOS_NOT_SPECIFIED;
m_Qos.SendingFlowspec.MaxSduSize = QOS_NOT_SPECIFIED;
m_Qos.ReceivingFlowspec = m_Qos.SendingFlowspec;
m_Qos.ProviderSpecific.buf = NULL;
m_Qos.ProviderSpecific.len = 0;
// insert RTPSession in global list
m_pSessNext = m_pSessFirst;
m_pSessFirst = this;
return S_OK;
ERROR_EXIT:
if (m_rtpsock)
{
delete m_rtpsock;
m_rtpsock = NULL;
}
if (m_rtcpsock)
{
delete m_rtcpsock;
m_rtcpsock = NULL;
}
return hr;
}
BOOL CRTPSession::SelectPorts()
{
// try port pairs in the dynamic range ( > 49152)
if (g_alport <= IPPORT_FIRST_DYNAMIC_END)
g_alport = IPPORT_FIRST_DYNAMIC_BEGIN;
for (;g_alport >= IPPORT_FIRST_DYNAMIC;)
{
m_rtpsock->SetLocalPort(g_alport);
if (m_rtpsock->BindMe() == 0)
{
/* it worked for the data, try the adjacent port for control*/
++g_alport;
m_rtcpsock->SetLocalPort(g_alport);
if (m_rtcpsock->BindMe() == 0)
{
g_alport-=3;
return TRUE;
}
else // start over at the previous even numbered port
{
if( WSAGetLastError() != WSAEADDRINUSE)
{
DEBUGMSG(ZONE_DP,("ObjRTPSession::SelectPorts failed with error %d\n",WSAGetLastError()));
goto ERROR_EXIT;
}
m_rtpsock->Cleanup();
if(!m_rtpsock->NewSock())
{
ASSERT(0);
return FALSE;
}
g_alport-=3;
continue;
}
}
if (WSAGetLastError() != WSAEADDRINUSE)
{
DEBUGMSG(ZONE_DP,("ObjRTPSession::SelectPorts failed with error %d\n",WSAGetLastError()));
goto ERROR_EXIT;
}
g_alport-=2; // try the next lower even numbered port
}
ERROR_EXIT:
m_rtcpsock->SetLocalPort(0);
m_rtpsock->SetLocalPort(0);
return FALSE;
}
STDMETHODIMP CRTPSession::SetLocalAddress(BYTE *pbAddr, UINT cbAddr)
{
HRESULT hr;
SOCKADDR_IN *pAddr = (SOCKADDR_IN *)pbAddr;
ASSERT(pbAddr);
Lock();
if ( IsMulticast(pAddr))
hr = SetMulticastAddress(pAddr);
else
if (m_rtpsock->GetLocalAddress()->sin_port != 0)
hr = S_OK; // already bound
else
{
m_rtpsock->SetLocalAddress(pAddr);
m_rtcpsock->SetLocalAddress(pAddr);
if (pAddr->sin_port != 0)
{
// port already chosen
m_rtcpsock->SetLocalPort(ntohs(pAddr->sin_port) + 1);
if (m_rtpsock->BindMe() != 0 || m_rtcpsock->BindMe() != 0)
{
hr = HRESULT_FROM_WIN32(GetLastError());
m_rtpsock->SetLocalPort(0);
m_rtcpsock->SetLocalPort(0);
}
else
hr = S_OK;
}
else
{
// client wants us to choose the port
if (SelectPorts()) {
hr = S_OK;
}
else
hr = HRESULT_FROM_WIN32(GetLastError());
}
}
Unlock();
return hr;
}
HRESULT
CRTPSession::SetMulticastAddress(PSOCKADDR_IN pAddr)
{
SOCKET s ;
SOCKADDR_IN rtcpAddr = *pAddr;
s = RRCMws.WSAJoinLeaf( m_rtpsock->GetSock(), (struct sockaddr *)pAddr, sizeof(SOCKADDR_IN), NULL, NULL, NULL, NULL, JL_BOTH);
if (s == INVALID_SOCKET)
return E_FAIL;
else {
rtcpAddr.sin_port = htons(ntohs(pAddr->sin_port)+1);
s = RRCMws.WSAJoinLeaf( m_rtcpsock->GetSock(), (struct sockaddr *)&rtcpAddr, sizeof(SOCKADDR_IN), NULL, NULL, NULL, NULL, JL_BOTH);
return S_OK;
}
}
STDMETHODIMP
CRTPSession::SetRemoteRTPAddress(BYTE *sockaddr, UINT cbAddr)
{
SOCKADDR_IN *pRTPAddr = (SOCKADDR_IN *)sockaddr;
Lock();
if (pRTPAddr) {
#ifdef DEBUG
if (m_rtpsock->GetRemoteAddress()->sin_addr.s_addr != INADDR_ANY
&& m_rtpsock->GetRemoteAddress()->sin_addr.s_addr != pRTPAddr->sin_addr.s_addr) {
DEBUGMSG(ZONE_DP,("Changing RTP Session remote address (already set)!\n"));
}
#endif
m_rtpsock->SetRemoteAddr(pRTPAddr);
}
Unlock();
return S_OK;
}
STDMETHODIMP
CRTPSession::SetRemoteRTCPAddress(BYTE *sockaddr, UINT cbAddr)
{
SOCKADDR_IN *pRTCPAddr = (SOCKADDR_IN *)sockaddr;
Lock();
if (pRTCPAddr) {
#ifdef DEBUG
if (m_rtcpsock->GetRemoteAddress()->sin_addr.s_addr != INADDR_ANY
&& m_rtcpsock->GetRemoteAddress()->sin_addr.s_addr != pRTCPAddr->sin_addr.s_addr) {
DEBUGMSG(ZONE_DP,("Changing RTCP Session remote address (already set)!\n"));
}
#endif
m_rtcpsock->SetRemoteAddr(pRTCPAddr);
if (m_hRTPSession)
updateRTCPDestinationAddress( m_hRTPSession,
(SOCKADDR *)m_rtcpsock->GetRemoteAddress(), sizeof(SOCKADDR_IN));
}
Unlock();
return S_OK;
}
STDMETHODIMP
CRTPSession::GetLocalAddress(const BYTE **sockaddr, UINT *pcbAddr)
{
if (sockaddr && pcbAddr)
{
Lock();
*sockaddr = (BYTE *)m_rtpsock->GetLocalAddress();
*pcbAddr = sizeof(SOCKADDR_IN);
Unlock();
return S_OK;
} else
{
return E_INVALIDARG;
}
}
STDMETHODIMP
CRTPSession::GetRemoteRTPAddress(const BYTE **sockaddr, UINT *pcbAddr)
{
if (sockaddr && pcbAddr )
{
Lock();
*sockaddr = (BYTE *)m_rtpsock->GetRemoteAddress();
*pcbAddr = sizeof(SOCKADDR_IN);
Unlock();
return S_OK;
} else
{
return E_INVALIDARG;
}
}
STDMETHODIMP
CRTPSession::GetRemoteRTCPAddress(const BYTE **sockaddr, UINT *pcbAddr)
{
if (sockaddr && pcbAddr)
{
Lock();
*sockaddr = (BYTE *)m_rtcpsock->GetRemoteAddress();
*pcbAddr = sizeof(SOCKADDR_IN);
Unlock();
return S_OK;
} else
{
return E_INVALIDARG;
}
}
STDMETHODIMP
CRTPSession::SetSendFlowspec(FLOWSPEC *pFlowspec)
{
QOS_DESTADDR qosDest;
DWORD cbRet;
int optval = pFlowspec->MaxSduSize;
// Set the RTP socket to not buffer more than one packet
// This will allow us to influence the packet scheduling.
if(RRCMws.setsockopt(m_rtpsock->GetSock(),SOL_SOCKET, SO_SNDBUF,(char *)&optval,sizeof(optval)) != 0)
{
RRCM_DBG_MSG ("setsockopt failed ", GetLastError(),
__FILE__, __LINE__, DBG_ERROR);
}
if (WSQOSEnabled && m_rtpsock)
{
m_Qos.SendingFlowspec = *pFlowspec;
m_Qos.ProviderSpecific.buf = (char *)&qosDest; // NULL
m_Qos.ProviderSpecific.len = sizeof (qosDest); // 0
// check to see if the receive flowspec has already been
// set. If it has, specify NOCHANGE for the receive service
// type. If not, specify NOTRAFFIC. This is done to circumvent
// a bug in the Win98 QOS/RSVP layer.
if (m_Qos.ReceivingFlowspec.TokenRate == QOS_NOT_SPECIFIED)
{
m_Qos.ReceivingFlowspec.ServiceType = SERVICETYPE_NOTRAFFIC;
}
else
{
m_Qos.ReceivingFlowspec.ServiceType = SERVICETYPE_NOCHANGE;
}
qosDest.ObjectHdr.ObjectType = QOS_OBJECT_DESTADDR;
qosDest.ObjectHdr.ObjectLength = sizeof(qosDest);
qosDest.SocketAddress = (PSOCKADDR)m_rtpsock->GetRemoteAddress();
qosDest.SocketAddressLength = sizeof(SOCKADDR_IN);
if (RRCMws.WSAIoctl(m_rtpsock->GetSock(),SIO_SET_QOS, &m_Qos, sizeof(m_Qos), NULL, 0, &cbRet, NULL,NULL) == 0)
return S_OK;
else
return GetLastError();
} else
return E_NOTIMPL;
}
STDMETHODIMP
CRTPSession::SetRecvFlowspec(FLOWSPEC *pFlowspec)
{
SOCKADDR_IN *pAddr = NULL;
DWORD cbRet;
if (WSQOSEnabled && m_rtpsock)
{
pAddr = m_rtpsock->GetRemoteAddress();
m_Qos.ReceivingFlowspec = *pFlowspec;
m_Qos.ProviderSpecific.buf = NULL;
m_Qos.ProviderSpecific.len = 0;
// check to see if the send flowspec has already been
// set. If it has, specify NOCHANGE for the receive service
// type. If not, specify NOTRAFFIC. This is done to circumvent
// a bug in the Win98 QOS/RSVP layer.
if (m_Qos.SendingFlowspec.TokenRate == QOS_NOT_SPECIFIED)
{
m_Qos.SendingFlowspec.ServiceType = SERVICETYPE_NOTRAFFIC;
}
else
{
m_Qos.SendingFlowspec.ServiceType = SERVICETYPE_NOCHANGE;
}
if (RRCMws.WSAIoctl(m_rtpsock->GetSock(),SIO_SET_QOS, &m_Qos, sizeof(m_Qos), NULL, 0, &cbRet, NULL,NULL) == 0)
return S_OK;
else
return GetLastError();
} else
return E_NOTIMPL;
}
// set the size used for receive packet buffers
STDMETHODIMP
CRTPSession::SetMaxPacketSize(UINT maxPacketSize)
{
m_uMaxPacketSize = maxPacketSize;
return S_OK;
}
HRESULT CRTPSession::SetRecvNotification(
PRTPRECVCALLBACK pRTPRecvCB, // pointer to callback function
DWORD_PTR dwCB, // callback arg
UINT nBufs // suggested number of receives to post
)
{
CRTPPacket1 *pRTPPacket;
if (!m_hRTPSession)
return E_FAIL;
m_pRTPCallback = pRTPRecvCB;
m_dwCallback = dwCB;
if (m_nBufsPosted >= nBufs)
return S_OK; // packets already posted
int nBufsToAllocate = nBufs - m_nBufsPosted - m_FreePkts.GetCount();
// allocate packets if necessary
while (nBufsToAllocate-- > 0)
{
if (pRTPPacket = new CRTPPacket1) {
if (!SUCCEEDED(pRTPPacket->Init(m_uMaxPacketSize)))
{
delete pRTPPacket;
break;
}
m_FreePkts.Put(pRTPPacket);
}
else
break;
}
PostRecv();
return m_nBufsPosted ? S_OK : E_OUTOFMEMORY;
}
HRESULT
CRTPSession::CancelRecvNotification()
{
m_pRTPCallback = NULL;
if (m_rtpsock) {
struct sockaddr myaddr;
int myaddrlen = sizeof(myaddr);
UINT i;
char buf = 0;
WSABUF wsabuf;
DWORD bytesSent;
UINT nBufsPosted;
wsabuf.buf = &buf;
wsabuf.len = 0;
BOOL fCanceled = FALSE;
if (RRCMws.getsockname(m_rtpsock->GetSock(),&myaddr,&myaddrlen)== 0) {
// send loopback packets (as many as there are recvs outstanding)
// on this socket to get back our buffers.
// NOTE: Winsock 2 on Win95 seems to have a bug where we get recv callbacks
// within sendto() rather than in the subsequent SleepEx, so we
// have to make a local copy of m_nBufsPosted
for (i=0, nBufsPosted = m_nBufsPosted;i < nBufsPosted;i++) {
if (RRCMws.sendTo(m_rtpsock->GetSock(),&wsabuf,1,&bytesSent,0,&myaddr, myaddrlen, NULL, NULL) < 0) {
DEBUGMSG(ZONE_DP,("CancelRecv: loopback send failed\n"));
break;
}
}
fCanceled = (i > 0);
} else {
DEBUGMSG(ZONE_DP,("RTPState::CancelRecv: getsockname returned %d\n",GetLastError()));
}
if (fCanceled)
while (m_nBufsPosted) {
DWORD dwStatus;
dwStatus = SleepEx(200,TRUE);
ASSERT(dwStatus==WAIT_IO_COMPLETION);
if (dwStatus !=WAIT_IO_COMPLETION)
break; // timed out => bail
}
}
return S_OK;
}
HRESULT
CRTPSession::PostRecv()
{
HRESULT hr;
DWORD dwError = 0;
DWORD dwRcvFlag;
WSAOVERLAPPED *pOverlapped;
DWORD nBytesRcvd;
CRTPPacket1 *pRTPPacket;
if (!m_hRTPSession || !m_pRTPCallback)
return E_FAIL;
// post buffers in the free queue
while (m_FreePkts.Get(&pRTPPacket))
{
pOverlapped = (WSAOVERLAPPED *)(pRTPPacket->GetOverlapped());
pOverlapped->hEvent = (WSAEVENT) this;
m_rcvSockAddrLen = sizeof(SOCKADDR);
dwRcvFlag = 0;
pRTPPacket->RestoreSize();
dwError = RRCMws.recvFrom (m_rtpsock->GetSock(),
pRTPPacket->GetWSABUF(),
1,
&nBytesRcvd,
&dwRcvFlag,
&m_rcvSockAddr,
&m_rcvSockAddrLen,
pOverlapped,
(LPWSAOVERLAPPED_COMPLETION_ROUTINE)WS2RecvCB);
if (dwError == SOCKET_ERROR) {
dwError = WSAGetLastError();
if (dwError != WSA_IO_PENDING) {
DEBUGMSG(ZONE_DP,("RTP recv error %d\n",dwError));
// m_rs.rcvStats.packetErrors++;
// return the buffer to the free list
m_FreePkts.Put(pRTPPacket);
break;
}
}
++m_nBufsPosted;
}
return m_nBufsPosted ? S_OK : S_FALSE;
}
HRESULT
CRTPSession::FreePacket(WSABUF *pBuf)
{
m_FreePkts.Put(CRTPPacket1::GetRTPPacketFromWSABUF(pBuf));
PostRecv();
return S_OK;
}
/*----------------------------------------------------------------------------
* Function: WS2SendCB
* Description: Winsock callback provided by the application to Winsock
*
* Input:
*
* Return: None
*--------------------------------------------------------------------------*/
void CALLBACK WS2SendCB (DWORD dwError,
DWORD cbTransferred,
LPWSAOVERLAPPED lpOverlapped,
DWORD dwFlags)
{
CRTPSession *pSess;
//get the RTPSession pointer so that we can mark the
//IO complete on the object
pSess= (CRTPSession *)lpOverlapped->hEvent;
ASSERT (&pSess->m_sOverlapped == lpOverlapped);
pSess->m_lastSendError = dwError;
pSess->m_fSendingSync=FALSE;
}
void CALLBACK WS2RecvCB (DWORD dwError,
DWORD len,
LPWSAOVERLAPPED lpOverlapped,
DWORD dwFlags)
{
CRTPSession *pRTP;
CRTPPacket1 *pRTPPacket;
DWORD ts, ssrc;
// GEORGEJ: catch Winsock 2 bug (94903) where I get a bogus callback
// after WSARecv returns WSAEMSGSIZE.
if (!dwError && ((int) len < 0)) {
RRCM_DBG_MSG ("RTP : RCV Callback : bad cbTransferred", len,
__FILE__, __LINE__, DBG_ERROR);
return;
}
pRTP = (CRTPSession *)lpOverlapped->hEvent; // cached by PostRecv
ASSERT(pRTP);
ASSERT(lpOverlapped);
ASSERT(pRTP->m_nBufsPosted > 0);
--pRTP->m_nBufsPosted; // one recv just completed
// Winsock 2 sometimes chooses to indicate a buffer-too-small
// error via the dwFlags parameter.
if (dwFlags & MSG_PARTIAL)
dwError = WSAEMSGSIZE;
pRTPPacket = CRTPPacket1::GetRTPPacketFromOverlapped(lpOverlapped);
if (!dwError)
{
// validate RTP header and update receive stats
dwError = RTPReceiveCheck(
pRTP->m_hRTPSession,
pRTP->m_rtpsock->GetSock(),
pRTPPacket->GetWSABUF()->buf,
len,
&pRTP->m_rcvSockAddr,
pRTP->m_rcvSockAddrLen
);
}
if (!pRTP->m_pRTPCallback)
{
// we have stopped doing notifications
// return the buffer to the free list
pRTP->FreePacket(pRTPPacket->GetWSABUF());
}
else if (!dwError) {
// call the callback
//++pRTP->m_nBufsRecvd;
// convert the RTP header fields to host order
pRTPPacket->SetTimestamp(ntohl(pRTPPacket->GetTimestamp()));
pRTPPacket->SetSeq(ntohs(( u_short)pRTPPacket->GetSeq()));
pRTPPacket->SetActual(len);
//LOG((LOGMSG_NET_RECVD,pRTPPacket->GetTimestamp(), pRTPPacket->GetSeq(), GetTickCount()));
if (!pRTP->m_pRTPCallback(pRTP->m_dwCallback, pRTPPacket->GetWSABUF()))
pRTP->FreePacket(pRTPPacket->GetWSABUF());
} else {
// packet error
// repost the buffer
pRTP->PostRecv();
}
}
// the way its defined now, this Send() method is synchronous or asynchronous
// depending on whether pOverlapped is NULL or not
HRESULT CRTPSession::Send(
WSABUF *pWsabufs,
UINT nWsabufs,
WSAOVERLAPPED *pOverlapped,
LPWSAOVERLAPPED_COMPLETION_ROUTINE pWSAPC )
{
DWORD dwError;
Lock();
RTP_HDR_T *pHdr = (RTP_HDR_T *)pWsabufs[0].buf;
// convert RTP header fields to network-order
pHdr->ts = htonl (pHdr->ts);
pHdr->seq = htons(pHdr->seq);
//*pHdr = m_ss.hdr;
pHdr->seq = htons(++m_ss.hdr.seq);
// update send stats
//m_ss.packetsSent++;
//m_ss.bytesSent += cbBuf-sizeof(RTP_HDR_MIN_LEN);
//bIOPending=TRUE; // reset when send completes
dwError = RTPSendTo (
m_hRTPSession,
(m_rtpsock->GetSock()),
pWsabufs,
nWsabufs,
&m_numBytesSend,
0,
(LPVOID)m_rtpsock->GetRemoteAddress(),
sizeof(SOCKADDR),
pOverlapped,
pWSAPC);
if (dwError == SOCKET_ERROR) {
dwError = WSAGetLastError();
if (dwError != WSA_IO_PENDING) {
DEBUGMSG(1, ("RTPSendTo error %d\n",dwError));
m_lastSendError = dwError;
m_ss.sendStats.packetErrors++;
m_fSendingSync = FALSE;
goto ErrorExit;
}
dwError = 0; // return success for ERROR_IO_PENDING
}
ErrorExit:
Unlock();
return dwError;
}
void CRTPSession::RTCPNotify(
int rrcmEvent,
DWORD_PTR dwSSRC,
DWORD_PTR rtcpsock)
{
switch (rrcmEvent) {
case RRCM_RECV_RTCP_SNDR_REPORT_EVENT:
GetRTCPReport();
//DispRTCPReport(rtcpsock);
break;
case RRCM_RECV_RTCP_RECV_REPORT_EVENT:
GetRTCPReport();
break;
case RRCM_NEW_SOURCE_EVENT:
RRCM_DBG_MSG ("RTP : New SSRC", 0,
__FILE__, __LINE__, DBG_TRACE);
break;
default:
RRCM_DBG_MSG ("RTP : RRCMNotification", rrcmEvent,
__FILE__, __LINE__, DBG_TRACE);
break;
}
}
void RRCMNotification(
// RRCM_EVENT_T rrcmEvent,
int rrcmEvent,
DWORD_PTR dwSSRC,
DWORD_PTR rtcpsock,
DWORD_PTR dwUser)
{
if (dwUser)
((CRTPSession *)dwUser)->RTCPNotify(rrcmEvent,dwSSRC,rtcpsock);
}
// Get the useful fields from the RTCP report and store them
// Only works for unicast sessions now (one sender, one receiver)
BOOL CRTPSession::GetRTCPReport()
{
#define MAX_RTCP_REPORT 2
RTCP_REPORT rtcpReport[MAX_RTCP_REPORT];
DWORD moreEntries = 0;
DWORD numEntry = 0;
DWORD i;
ZeroMemory(rtcpReport,sizeof(rtcpReport));
// Get latest RTCP report
// for all SSRCs in this session
if (RTCPReportRequest ( m_rtcpsock->GetSock(),
0, &numEntry,
&moreEntries, MAX_RTCP_REPORT,
rtcpReport,
0,NULL,0))
return FALSE;
for (i = 0; i < numEntry; i++)
{
if (rtcpReport[i].status & LOCAL_SSRC_RPT)
{
m_ss.sendStats.ssrc = rtcpReport[i].ssrc;
m_ss.sendStats.packetsSent = rtcpReport[i].dwSrcNumPcktRealTime;
m_ss.sendStats.bytesSent = rtcpReport[i].dwSrcNumByteRealTime;
} else {
m_rs.rcvStats.ssrc = rtcpReport[i].ssrc;
m_rs.rcvStats.packetsSent = rtcpReport[i].dwSrcNumPckt;
m_rs.rcvStats.bytesSent = rtcpReport[i].dwSrcNumByte;
m_rs.rcvStats.packetsLost = rtcpReport[i].SrcNumLost;
m_rs.rcvStats.jitter = rtcpReport[i].SrcJitter;
// Get the SR timestamp information
m_rs.ntpTime = ((NTP_TS)rtcpReport[i].dwSrcNtpMsw << 32) + rtcpReport[i].dwSrcNtpLsw;
m_rs.rtpTime = rtcpReport[i].dwSrcRtpTs;
// check if any feedback information
if (rtcpReport[i].status & FEEDBACK_FOR_LOCAL_SSRC_PRESENT)
{
DWORD prevPacketsLost = m_ss.sendStats.packetsLost;
m_ss.sendStats.packetsLost = rtcpReport[i].feedback.cumNumPcktLost;
/*
if (prevPacketsLost != m_ss.sendStats.packetsLost) {
DEBUGMSG(ZONE_DP,("RTCP: fraction Lost=%d/256 , totalLost =%d, StreamClock=%d\n",rtcpReport[i].feedback.fractionLost,m_ss.sendStats.packetsLost,m_clockRate));
}
*/
m_ss.sendStats.jitter = rtcpReport[i].feedback.dwInterJitter;
}
}
}
m_ss.sendStats.packetsDelivered = m_ss.sendStats.packetsSent - m_ss.sendStats.packetsLost;
return TRUE;
}
// CRTPPacket1 methods
HRESULT CRTPPacket1::Init(UINT uMaxPacketSize)
{
m_wsabuf.buf = new char [uMaxPacketSize];
if (!m_wsabuf.buf)
return E_OUTOFMEMORY;
m_wsabuf.len = uMaxPacketSize;
m_cbSize = uMaxPacketSize;
return S_OK;
}
CRTPPacket1::~CRTPPacket1()
{
if (m_wsabuf.buf)
delete [] m_wsabuf.buf;
}