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| author | Ian McDonald <ian.mcdonald@jandi.co.nz> | 2006-08-27 04:06:42 +0200 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2006-08-27 04:06:42 +0200 |
| commit | 837d107cd101fbf734e9ea2bbb5c7336a329e432 (patch) | |
| tree | 0a292efbba9272136365b62cf4d915a16ac0a130 /net/dccp/dccp.h | |
| parent | [DCCP]: Update contact details and copyright (diff) | |
| download | linux-837d107cd101fbf734e9ea2bbb5c7336a329e432.tar.xz linux-837d107cd101fbf734e9ea2bbb5c7336a329e432.zip | |
[DCCP]: Introduces follows48 function
This adds a new function to see if two sequence numbers follow each
other.
Signed off by: Ian McDonald <ian.mcdonald@jandi.co.nz>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/dccp/dccp.h')
| -rw-r--r-- | net/dccp/dccp.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/net/dccp/dccp.h b/net/dccp/dccp.h index b8931d33bec3..a5c5475724c0 100644 --- a/net/dccp/dccp.h +++ b/net/dccp/dccp.h @@ -81,6 +81,14 @@ static inline u64 max48(const u64 seq1, const u64 seq2) return after48(seq1, seq2) ? seq1 : seq2; } +/* is seq1 next seqno after seq2 */ +static inline int follows48(const u64 seq1, const u64 seq2) +{ + int diff = (seq1 & 0xFFFF) - (seq2 & 0xFFFF); + + return diff==1; +} + enum { DCCP_MIB_NUM = 0, DCCP_MIB_ACTIVEOPENS, /* ActiveOpens */ |