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authorGerrit Renker <gerrit@erg.abdn.ac.uk>2007-10-24 10:12:09 -0200
committerArnaldo Carvalho de Melo <acme@ghostprotocols.net>2007-10-24 10:12:09 -0200
commitfde20105f332614b23a3131d706cd90bdd7db72d (patch)
tree217c186a8c038a7a6d7bcc775081f9566b903e36 /net/dccp
parent03cf786c4e83dba404ad23ca58f49147ae52dffd (diff)
[DCCP]: Retrieve packet sequence number for error reporting
This fixes a problem when analysing erroneous packets in dccp_v{4,6}_err: * dccp_hdr_seq currently takes an skb * however, the transport headers in the skb are shifted, due to the preceding IPv4/v6 header. Fixed for v4 and v6 by changing dccp_hdr_seq to take a struct dccp_hdr as argument. Verified that the correct sequence number is now reported in the error handler. 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>
Diffstat (limited to 'net/dccp')
-rw-r--r--net/dccp/ipv4.c4
-rw-r--r--net/dccp/ipv6.c4
2 files changed, 4 insertions, 4 deletions
diff --git a/net/dccp/ipv4.c b/net/dccp/ipv4.c
index 222549ab274..3f1578db93e 100644
--- a/net/dccp/ipv4.c
+++ b/net/dccp/ipv4.c
@@ -241,7 +241,7 @@ static void dccp_v4_err(struct sk_buff *skb, u32 info)
goto out;
dp = dccp_sk(sk);
- seq = dccp_hdr_seq(skb);
+ seq = dccp_hdr_seq(dh);
if (sk->sk_state != DCCP_LISTEN &&
!between48(seq, dp->dccps_swl, dp->dccps_swh)) {
NET_INC_STATS_BH(LINUX_MIB_OUTOFWINDOWICMPS);
@@ -795,7 +795,7 @@ static int dccp_v4_rcv(struct sk_buff *skb)
dh = dccp_hdr(skb);
- DCCP_SKB_CB(skb)->dccpd_seq = dccp_hdr_seq(skb);
+ DCCP_SKB_CB(skb)->dccpd_seq = dccp_hdr_seq(dh);
DCCP_SKB_CB(skb)->dccpd_type = dh->dccph_type;
dccp_pr_debug("%8.8s "
diff --git a/net/dccp/ipv6.c b/net/dccp/ipv6.c
index bbadd6681b8..62428ff137d 100644
--- a/net/dccp/ipv6.c
+++ b/net/dccp/ipv6.c
@@ -173,7 +173,7 @@ static void dccp_v6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
icmpv6_err_convert(type, code, &err);
- seq = DCCP_SKB_CB(skb)->dccpd_seq;
+ seq = dccp_hdr_seq(dh);
/* Might be for an request_sock */
switch (sk->sk_state) {
struct request_sock *req, **prev;
@@ -787,7 +787,7 @@ static int dccp_v6_rcv(struct sk_buff *skb)
dh = dccp_hdr(skb);
- DCCP_SKB_CB(skb)->dccpd_seq = dccp_hdr_seq(skb);
+ DCCP_SKB_CB(skb)->dccpd_seq = dccp_hdr_seq(dh);
DCCP_SKB_CB(skb)->dccpd_type = dh->dccph_type;
if (dccp_packet_without_ack(skb))