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

net/dccp/dccp.h

+8 −0
Original line number Diff line number Diff line
@@ -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 */