Changes between Initial Version and Version 1 of Ticket #1148


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Timestamp:
Oct 16, 2010 3:40:53 AM (12 years ago)
Author:
nanang
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  • Ticket #1148 – Description

    initial v1  
    1 When SDP media in the offer uses port zero, it means that the media is not wanted and must be answered with port zero as well (RFC 3264 Section 5.1 and 8.2). 
     1When SDP media in the offer uses port zero, it means that the media is not wanted and must be answered with port zero as well (RFC 3264 Section 5.1 and 8.2). However, some implementations may disobey it (we found one!), and unfortunately it may lead to assertion in the SDP negotiation process (when there is dynamic payload type involved). 
    22 
    3 However, some implementations may disobey it (we found one!), and unfortunately it leads to assertion in the SDP negotiation process. 
     3Sample SDP offer/answer that trigger assertion: 
     4 - Offer (may be after some offer/answer cycles): 
     5{{{ 
     6... 
     7m=audio 4000 RTP/AVP 0 
     8m=video 0 RTP/AVP 100 
     9... 
     10}}} 
     11 
     12 - Answer: 
     13{{{ 
     14... 
     15m=audio 6000 RTP/AVP 0 
     16m=video 7000 RTP/AVP 100 
     17a=rtpmap:100 H261/90000 
     18... 
     19}}}