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sctp: implement definition for SACK-IMMEDIATELY extension

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This patch implement the definition for SACK-IMMEDIATELY
extension.

Section 3.  The I-bit in the DATA Chunk Header

   The following Figure 1 shows the extended DATA chunk.

    0                   1                   2                   3
    0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |   Type = 0    |  Res  |I|U|B|E|           Length              |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |                              TSN                              |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |        Stream Identifier      |     Stream Sequence Number    |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   |                  Payload Protocol Identifier                  |
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
   \                                                               \
   /                           User Data                           /
   \                                                               \
   +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

                                 Figure 1

   The only difference between the DATA chunk in Figure 1 and the DATA
   chunk defined in [RFC4960] is the addition of the I-bit in the flags
   field of the chunk header.

Signed-off-by: Wei Yongjun <yjwei@cn.fujitsu.com>
Signed-off-by: Vlad Yasevich <vladislav.yasevich@hp.com>
This commit is contained in:
Wei Yongjun 2009-11-23 15:53:52 -05:00 committed by Vlad Yasevich
parent dc63d3771c
commit 475cba4ec8
1 changed files with 1 additions and 0 deletions
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1
include/linux/sctp.h
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@ -242,6 +242,7 @@ enum {
SCTP_DATA_FIRST_FRAG = 0x02, SCTP_DATA_FIRST_FRAG = 0x02,
SCTP_DATA_NOT_FRAG = 0x03, SCTP_DATA_NOT_FRAG = 0x03,
SCTP_DATA_UNORDERED = 0x04, SCTP_DATA_UNORDERED = 0x04,
SCTP_DATA_SACK_IMM = 0x08,
}; };
enum { SCTP_DATA_FRAG_MASK = 0x03, }; enum { SCTP_DATA_FRAG_MASK = 0x03, };