[Live-devel] Transport header VLC client

[Ross Finlayson]

>I was curious if anybody has experience using transport header in VLC
>client code to designate the address where the server should play it
>stream. This is the example from RTSP RFC 2326bis.
>
>>  C->S: SETUP rtsp://example.com/foo/bar/baz.rm RTSP/2.0
>>             CSeq: 302
>>             Transport: RTP/AVP;multicast;mode="PLAY",
>>                 RTP/AVP;unicast;dest_addr="192.0.2.5:3456"/
>>                 "192.0.2.5:3457";mode="PLAY"
>>
>>       S->C: RTSP/2.0 200 OK
>>             CSeq: 302
>>             Date: 23 Jan 1997 15:35:06 GMT
>>             Session: 47112344
>>             Transport: RTP/AVP;unicast;dest_addr="192.0.2.5:3456"/
>>             "192.0.2.5:3457";src_addr="192.0.2.224:6256"
>>             /"192.0.2.224:6257";mode="PLAY"

Note that the "LIVE555 Streaming Media" code does not yet support 
(for either clients or servers) the RTSP 2.0 proposal (as defined by 
the "2326bis" Internet Draft).  We currently support only the RTSP 
1.0 standard (RFC 2326).  In RTSP 1.0, the parameter that you're 
referring to is called "destination", not "dest_addr".

In any case, our RTSP client implementation (and thus, VLC) does not 
support this.  Neither does our RTSP server implementation (except in 
some normally #ifdef'd out code in "RTSPServer.cpp").  Note that 
allowing the client to specify the IP address that the server should 
send has major security implications - it would effectively make 
possible denial-of-service attacks on innocent third parties - and so 
probably no RTSP server anywhere supports this feature by default.
-- 

Ross Finlayson
Live Networks, Inc.
http://www.live555.com/