[PATCH 3/7] [DCCP]: Introduces follows48 function
From: Ian McDonald <hidden>
Date: 2006-08-24 03:22:07
Subsystem:
networking [general], the rest · Maintainers:
"David S. Miller", Eric Dumazet, Jakub Kicinski, Paolo Abeni, Linus Torvalds
This adds a new function to see if two sequence numbers follow each other. Signed off by: Ian McDonald [off-list ref] ---
diff --git a/net/dccp/dccp.h b/net/dccp/dccp.h
index b8931d3..84b477d 100644
--- a/net/dccp/dccp.h
+++ b/net/dccp/dccp.h@@ -81,6 +81,14 @@ static inline u64 max48(const u64 seq1, 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 */