Darwin Streaming Server 支持UDP穿透

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项目要求使用RTSP协议进行点播直播，

找了很多开源流媒体服务器，最后决定使用Drawin做服务器。

但是在部署中发现，Drawin不支持Client在NAT后面的情况。尽管RTSP Client已经发出了RTSP的打洞包。

还好， Darwin 是开源的，直接上手修改代码。

其实修改的部分很少，也很简单。

就是RTPStream.cpp

RTPStream::Write 方法

现实修改RTCP部分

+ expand sourceview plaincopy to clipboardprint?
if ( fTransportType == qtssRTPTransportTypeTCP )// write out in interleave format on the RTSP TCP channel
{
    err = this->InterleavedWrite( thePacket->packetData, inLen, outLenWritten, fRTCPChannel );
}
else if ( inLen > 0 )
{
    (void)fSockets->GetSocketB()->SendTo(fRemoteAddr, fRemoteRTCPPort, thePacket->packetData, inLen);
}
        if ( fTransportType == qtssRTPTransportTypeTCP )// write out in interleave format on the RTSP TCP channel
        {
            err = this->InterleavedWrite( thePacket->packetData, inLen, outLenWritten, fRTCPChannel );
        }
        else if ( inLen > 0 )
        {
            (void)fSockets->GetSocketB()->SendTo(fRemoteAddr, fRemoteRTCPPort, thePacket->packetData, inLen);
        }

修改为

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01.     if ( fTransportType == qtssRTPTransportTypeTCP )// write out in interleave format on the RTSP TCP channel
02.     {
03.         err = this->InterleavedWrite( thePacket->packetData, inLen, outLenWritten, fRTCPChannel );
04.     }
05.     else if ( inLen > 0 )
06.     {
07.UInt32 iRemoteAddr=0;
08.UInt16 iRemotePort=0;
09.char szBuff[64];
10.UInt32 iBufLen=sizeof(szBuff);
11.UInt32 iRecvLen=0;
12.(void)fSockets->GetSocketB()->RecvFrom(&iRemoteAddr,&iRemotePort,szBuff,iBufLen,&iRecvLen);
13.if (iRemoteAddr==fRemoteAddr
14.    &&iRemotePort!=0
15.    &&iRecvLen>0)
16.{
17.    fRemoteRTCPPort=iRemotePort;
18.}
19.
20.         (void)fSockets->GetSocketB()->SendTo(fRemoteAddr, fRemoteRTCPPort, thePacket->packetData, inLen);
21.     }
        if ( fTransportType == qtssRTPTransportTypeTCP )// write out in interleave format on the RTSP TCP channel
        {
            err = this->InterleavedWrite( thePacket->packetData, inLen, outLenWritten, fRTCPChannel );
        }
        else if ( inLen > 0 )
        {
   UInt32 iRemoteAddr=0;
   UInt16 iRemotePort=0;
   char szBuff[64];
   UInt32 iBufLen=sizeof(szBuff);
   UInt32 iRecvLen=0;
   (void)fSockets->GetSocketB()->RecvFrom(&iRemoteAddr,&iRemotePort,szBuff,iBufLen,&iRecvLen);
   if (iRemoteAddr==fRemoteAddr
    &&iRemotePort!=0
    &&iRecvLen>0)
   {
    fRemoteRTCPPort=iRemotePort;
   }

(void)fSockets->GetSocketB()->SendTo(fRemoteAddr, fRemoteRTCPPort, thePacket->packetData, inLen);
}

以类似的方法修改RTP的发送部分

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01.if ( fTransportType == qtssRTPTransportTypeTCP )    // write out in interleave format on the RTSP TCP channel
02.    err = this->InterleavedWrite( thePacket->packetData, inLen, outLenWritten, fRTPChannel );
03.else if ( fTransportType == qtssRTPTransportTypeReliableUDP )
04.    err = this->ReliableRTPWrite( thePacket->packetData, inLen, theCurrentPacketDelay );
05.else if ( inLen > 0 )
06.    (void)fSockets->GetSocketA()->SendTo(fRemoteAddr, fRemoteRTPPort, thePacket->packetData, inLen);

本文来自CSDN博客，转载请标明出处：http://blog.csdn.net/zblue78/archive/2010/06/24/5692595.aspx