QuickTime Broadcaste使用TCP的踪迹

下面是QuickTime Broadcaster通过TCP发送MPEG 4流的踪迹。TCP连接使用同样系列的RTSP请求和端口标识，请求中带有由标准定义的RTP/AVP/TCP传输协议信息，每个流都有interleaved= 这样的关键字来指定端口。

对于这个例子，我们通过qtaccess文件中的设定将认证和授权禁用了，这使所有用户都可以向服务器发布流。播送文件的路径是相对于电影目录的。如果请求中的ＵRL指定的SDP文件已经存在，则会被替代掉。已经连接到该URL的客户不会被更新，因为如果要更新的话，需要客户端重新发送一个新的DESCRIBE请求，目前没有办法可以将SDP的变化通知给客户。

客户端发送给服务器端：

ANNOUNCE rtsp://127.0.0.1/mystream.sdp RTSP/1.0\r\n
    CSeq: 1\r\n
    Content-Type: application/sdp\r\n
    User-Agent: QTS (qtver=6.1;cpu=PPC;os=Mac 10.2.3)\r\n
    Content-Length: 790\r\n
    \r\n
    c=IN IP4
    127.0.0.1\ra=x-qt-text-nam:test\ra=x-qt-text-cpy:apple\ra=x-qt-text-aut:
    john\ra=x-qt-text-inf:none\ra=mpeg4-iod:"data:application/
    mpeg4-iod;base64,AoF/
    AE8BAQEBAQOBEgABQHRkYXRhOmFwcGxpY2F0aW9uL21wZWc0LW9kLWF1O2Jhc2U2NCxBVGdC
    R3dVZkF4Y0F5U1FBWlFRTklCRUFGM0FBQVBvQUFBRERVQVlCQkFFWkFwOERGUUJsQlFRTlFC
    VUFCOUFBQUQ2QUFBQStnQVlCQXc9PQQNAQUAAMgAAAAAAAAAAAYJAQAAAAAAAAAAA2EAAkA+
    ZGF0YTphcHBsaWNhdGlvbi9tcGVnNC1iaWZzLWF1O2Jhc2U2NCx3QkFTZ1RBcUJYSmhCSWhR
    UlFVL0FBPT0EEgINAAAUAAAAAAAAAAAFAwAAQAYJAQAAAAAAAAAA"\ra=isma-
    compliance:1,1.0,1\rm=audio 0 RTP/AVP 96\ra=rtpmap:96
    X-QT/8000/1\ra=control:trackid=1\rm=video 0 RTP/AVP 97\ra=rtpmap:97
    MP4V-ES\ra=fmtp:97
    profile-level-id=1;config=000001B0F3000001B50EE040C0CF0000010000000120008440FA285020F0
    A31F\ra=mpeg4-esid:201\ra=cliprect:0,0,240,320\ra=control:trackid=2\r

服务器端发送给客户端：

RTSP/1.0 200 OK\r\n
    Server: QTSS/4.1.3.x (Build/425; Platform/MacOSX; Release/Development;)\r\n
    Cseq: 1\r\n
    \r\n

客户端发送给服务器端：

// The broadcaster is trying to determine if RECORD is supported. QTSS 4.0 used an Apple
    // method of RECEIVE instead of the RECORD.
    
    OPTIONS rtsp://127.0.0.1/mystream.sdp RTSP/1.0\r\n
    CSeq: 2\r\n
    User-Agent: QTS (qtver=6.1;cpu=PPC;os=Mac 10.2.3)\r\n
    \r\n

服务器端发送给客户端：

RTSP/1.0 200 OK\r\n
    Server: QTSS/4.1.3.x (Build/425; Platform/MacOSX; Release/Development;)\r\n
    Cseq: 2\r\n
    Public: DESCRIBE, SETUP, TEARDOWN, PLAY, PAUSE, ANNOUNCE, SET_PARAMETER, RECORD\r\n
    \r\n

客户端发送给服务器端：

// Here is the first setup with the transport defined from the client to the 
    // server. The URL is the same as when a client performs a setup requesting 
    // a stream. QTSS does not allow a SETUP on a stream that is already set up 
    // and will return an error. This can happen in two ways.
    // 1) A broadcast software error that does not change the URL.
    // 2) A broadcast dies without performing a teardown. In this case, the
    // broadcast session has to timeout and die before another setup can occur.
    // The server uses a short timeout of 20 seconds for broadcast sessions. The 
    // timeout is refreshed by any packet received from the broadcaster.
    SETUP rtsp://127.0.0.1/mystream.sdp/trackid=1 RTSP/1.0\r\n
    CSeq: 3\r\n
    Transport: RTP/AVP/TCP;unicast;mode=record;interleaved=0-1\r\n
    User-Agent: QTS (qtver=6.1;cpu=PPC;os=Mac 10.2.3)\r\n
    Accept-Language: en-US\r\n
    \r\n

服务器端发送给客户端：

// The server responds with the interleaved values. If the values conflict,
    // the client will change them so each stream has a unique set of 
    // interleaved IDs.
    
    RTSP/1.0 200 OK\r\n
    Server: QTSS/4.1.3.x (Build/425; Platform/MacOSX; Release/Development;)\r\n
    Cseq: 3\r\n
    Cache-Control: no-cache\r\n
    Session: 6664885458621367225\r\n
    Date: Thu, 13 Feb 2003 21:34:27 GMT\r\n
    Expires: Thu, 13 Feb 2003 21:34:27 GMT\r\n
    Transport: RTP/AVP/TCP;unicast;mode=record;interleaved=0-1\r\n
    \r\n

客户端发送给服务器端：

SETUP rtsp://127.0.0.1/mystream.sdp/trackid=2 RTSP/1.0\r\n
    CSeq: 4\r\n
    Transport: RTP/AVP/TCP;unicast;mode=record;interleaved=2-3\r\n
    Session: 6664885458621367225\r\n
    User-Agent: QTS (qtver=6.1;cpu=PPC;os=Mac 10.2.3)\r\n
    Accept-Language: en-US\r\n
    \r\n

服务器端发送给客户端：

RTSP/1.0 200 OK\r\n
    Server: QTSS/4.1.3.x (Build/425; Platform/MacOSX; Release/Development;)\r\n
    Cseq: 4\r\n
    Session: 6664885458621367225\r\n
    Cache-Control: no-cache\r\n
    Date: Thu, 13 Feb 2003 21:34:27 GMT\r\n
    Expires: Thu, 13 Feb 2003 21:34:27 GMT\r\n
    Transport: RTP/AVP/TCP;unicast;mode=record;interleaved=2-3\r\n
    \r\n

客户端发送给服务器端：

// This is the equivalent to a client PLAY request. The broadcaster is now
    // starting the streams.
    
    RECORD rtsp://127.0.0.1/mystream.sdp RTSP/1.0\r\n
    CSeq: 5\r\n
    Session: 6664885458621367225\r\n
    User-Agent: QTS (qtver=6.1;cpu=PPC;os=Mac 10.2.3)\r\n
    \r\n

服务器端发送给客户端：

// RTCPs will be sent back on the channels to show the number of watching
    // clients.
    RTSP/1.0 200 OK\r\n
    Server: QTSS/4.1.3.x (Build/425; Platform/MacOSX; Release/Development;)\r\n
    Cseq: 5\r\n
    Session: 6664885458621367225\r\n
    RTP-Info: url=trackid=1,url=trackid=2\r\n
    \r\n

客户端发送给服务器端：

PAUSE rtsp://127.0.0.1/mystream.sdp RTSP/1.0\r\n
    CSeq: 6\r\n
    Session: 6664885458621367225\r\n
    User-Agent: QTS (qtver=6.1;cpu=PPC;os=Mac 10.2.3)\r\n
    \r\n

服务器端发送给客户端：

RTSP/1.0 200 OK\r\n
    Server: QTSS/4.1.3.x (Build/425; Platform/MacOSX; Release/Development;)\r\n
    Cseq: 6\r\n
    Session: 6664885458621367225\r\n
    \r\n

客户端发送给服务器端：

// A TEARDOWN stops the broadcast streams. It does not stop the clients or 
    // their streams. By default, QTSS allows a restarted or different broadcaster
    // to send to the same URL and the clients will receive the new streams. This
    // can be both good and bad since the broadcaster can change the stream media
    // type on the clients. The streamingserver.xml file provides an attribute
    // that allows the server to force clients to disconnect if the broadcaster
    // disconnects. The broadcast receiver is recommended to have a way for an
    // administrator or the broadcaster to tear down sessions that have failed.
    // The server adds a 30 second timeout between SSRC values to prevent someone
    // from pirating a stream.  As long as a stream is playing with the initial
    // SSRC, another stream arriving on the same ports will not be reflected to
    // clients. Attempts to pirate a steam usually occur by accident when users
    // manually set their SDP ports.
    TEARDOWN rtsp://127.0.0.1/mystream.sdp RTSP/1.0\r\n
    CSeq: 7\r\n
    Session: 6664885458621367225\r\n
    User-Agent: QTS (qtver=6.1;cpu=PPC;os=Mac 10.2.3)\r\n
    \r\n

服务器端发送给客户端：

// The server removes the SDP file from the movies directory on teardown or
    // broadcaster timeout.
    RTSP/1.0 200 OK\r\n
    Server: QTSS/4.1.3.x (Build/425; Platform/MacOSX; Release/Development;)\r\n
    Cseq: 7\r\n
    Session: 6664885458621367225\r\n
    Connection: Close\r\n
    \r\n

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