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[DCCP]: Fix for follows48 

The follows48 relation identifies whether 48-bit sequence number
x is the direct successor of y. Currently, it does not handle cases
of the following type correctly:

	follows48(0x(prefix)10000LL, 0x(prefix)0FFFFLL)

where prefix is an arbitrary hex sequence of up to 7 digits.

This is fixed by reusing the new dccp_delta_seqno function.

Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk>
Acked-by: Ian McDonald <ian.mcdonald@jandi.co.nz>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Gerrit Renker 2007-03-20 13:03:47 -03:00 committed by David S. Miller
parent d52de17b8c
commit b16be51b5e
1 changed files with 1 additions and 3 deletions
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4
net/dccp/dccp.h
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@ -144,9 +144,7 @@ static inline u64 max48(const u64 seq1, const u64 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;
return dccp_delta_seqno(seq2, seq1) == 1;
}
enum {