Commit 837d107c authored by Ian McDonald's avatar Ian McDonald Committed by David S. Miller

[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: default avatarDavid S. Miller <davem@davemloft.net>
parent e6bccd35
......@@ -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 */
......
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