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Commit 0ac78870 authored by Gerrit Renker's avatar Gerrit Renker Committed by David S. Miller
Browse files

dccp: fix error in updating the GAR 



This fixes a bug in updating the Greatest Acknowledgment number Received (GAR):
the current implementation does not track the greatest received value -
lower values in the range AWL..AWH (RFC 4340, 7.5.1) erase higher ones.

Signed-off-by: default avatarGerrit Renker <gerrit@erg.abdn.ac.uk>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent a301e170

net/dccp/input.c

+2 −1
Original line number Diff line number Diff line
@@ -239,7 +239,8 @@ static int dccp_check_seqno(struct sock *sk, struct sk_buff *skb) 
		dccp_update_gsr(sk, seqno);



		if (dh->dccph_type != DCCP_PKT_SYNC &&

		    (ackno != DCCP_PKT_WITHOUT_ACK_SEQ))

		    ackno != DCCP_PKT_WITHOUT_ACK_SEQ &&

		    after48(ackno, dp->dccps_gar))

			dp->dccps_gar = ackno;

	} else {

		unsigned long now = jiffies;