RFC Errata
RFC 3264, "An Offer/Answer Model with Session Description Protocol (SDP)", June 2002
Note: This RFC has been updated by RFC 6157, RFC 8843, RFC 9143
Source of RFC: mmusic (rai)
Errata ID: 2098
Status: Held for Document Update
Type: Technical
Publication Format(s) : TEXT
Reported By: Parveen Verma
Date Reported: 2010-03-30
Held for Document Update by: Robert Sparks
Section 10 says:
10.1 Basic Exchange Assume that the caller, Alice, has included the following description in her offer. It includes a bidirectional audio stream and two bidirectional video streams, using H.261 (payload type 31) and MPEG (payload type 32). The offered SDP is: v=0 o=alice 2890844526 2890844526 IN IP4 host.anywhere.com s= c=IN IP4 host.anywhere.com t=0 0 m=audio 49170 RTP/AVP 0 a=rtpmap:0 PCMU/8000 m=video 51372 RTP/AVP 31 a=rtpmap:31 H261/90000 m=video 53000 RTP/AVP 32 a=rtpmap:32 MPV/90000
It should say:
10.1 Basic Exchange Assume that the caller, Alice, has included the following description in her offer. It includes a bidirectional audio stream and two bidirectional video streams, using H.261 (payload type 31) and MPEG (payload type 32). The offered SDP is: v=0 o=alice 2890844526 2890844526 IN IP4 host.anywhere.com s=- c=IN IP4 host.anywhere.com t=0 0 m=audio 49170 RTP/AVP 0 a=rtpmap:0 PCMU/8000 m=video 51372 RTP/AVP 31 a=rtpmap:31 H261/90000 m=video 53000 RTP/AVP 32 a=rtpmap:32 MPV/90000
Notes:
The s= session name must have some values as per RFC 4566 Sec 5.3.
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RFC 4566
5.3. Session Name ("s=")
s=<session name>
The "s=" field is the textual session name. There MUST be one and
only one "s=" field per session description. The "s=" field MUST NOT
be empty and SHOULD contain ISO 10646 characters (but see also the
"a=charset" attribute). If a session has no meaningful name, the
value "s= " SHOULD be used (i.e., a single space as the session name).
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RFC 3264 also states in Section 5
"Unfortunately, SDP does not allow the "s=" line to be empty."
Even if we put "s= " , it becomes a bit difficult to read/understand in soft/printed copy.
The same error applies to all SDP examples given in Section 10