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RFC Errata Report » RFC Editor
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RFC Errata
RFC 793, "Transmission Control Protocol", September 1981
Note: This RFC has been obsoleted by RFC 9293
Note: This RFC has been updated by RFC 1122, RFC 3168, RFC 6093, RFC 6528
Source of RFC: LegacyArea Assignment: tsv
Errata ID: 1571
Status: Held for Document Update
Type: Technical
Publication Format(s) : TEXT
Reported By: Constantin Hagemeier
Date Reported: 2008-10-11
Held for Document Update by: Wesley Eddy
Section 3.1 says:
Maximum Segment Size Option Data: 16 bits If this option is present, then it communicates the maximum receive segment size at the TCP which sends this segment. This field must only be sent in the initial connection request (i.e., in segments with the SYN control bit set). If this option is not used, any segment size is allowed.
It should say:
Maximum Segment Size Option Data: 16 bits If this option is present, then it communicates the maximum receive segment size at the TCP which sends this segment. This field may be sent in the initial connection request (i.e., in segments with the SYN control bit set) and must not be sent in other segments. If this option is not used, any segment size is allowed.
Notes:
'must only' is ambiguous or even senseless.
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