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| author | Gerrit Renker <gerrit@erg.abdn.ac.uk> | 2007-10-24 10:12:09 -0200 |
|---|---|---|
| committer | Arnaldo Carvalho de Melo <acme@ghostprotocols.net> | 2007-10-24 10:12:09 -0200 |
| commit | fde20105f332614b23a3131d706cd90bdd7db72d (patch) | |
| tree | 217c186a8c038a7a6d7bcc775081f9566b903e36 /include/linux/dccp.h | |
| parent | 03cf786c4e83dba404ad23ca58f49147ae52dffd (diff) | |
| download | op-kernel-dev-fde20105f332614b23a3131d706cd90bdd7db72d.zip op-kernel-dev-fde20105f332614b23a3131d706cd90bdd7db72d.tar.gz | |
[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 'include/linux/dccp.h')
| -rw-r--r-- | include/linux/dccp.h | 10 |
1 files changed, 4 insertions, 6 deletions
diff --git a/include/linux/dccp.h b/include/linux/dccp.h index f3fc439..55d28cb 100644 --- a/include/linux/dccp.h +++ b/include/linux/dccp.h @@ -270,10 +270,9 @@ static inline struct dccp_hdr *dccp_zeroed_hdr(struct sk_buff *skb, int headlen) return memset(skb_transport_header(skb), 0, headlen); } -static inline struct dccp_hdr_ext *dccp_hdrx(const struct sk_buff *skb) +static inline struct dccp_hdr_ext *dccp_hdrx(const struct dccp_hdr *dh) { - return (struct dccp_hdr_ext *)(skb_transport_header(skb) + - sizeof(struct dccp_hdr)); + return (struct dccp_hdr_ext *)((unsigned char *)dh + sizeof(*dh)); } static inline unsigned int __dccp_basic_hdr_len(const struct dccp_hdr *dh) @@ -287,13 +286,12 @@ static inline unsigned int dccp_basic_hdr_len(const struct sk_buff *skb) return __dccp_basic_hdr_len(dh); } -static inline __u64 dccp_hdr_seq(const struct sk_buff *skb) +static inline __u64 dccp_hdr_seq(const struct dccp_hdr *dh) { - const struct dccp_hdr *dh = dccp_hdr(skb); __u64 seq_nr = ntohs(dh->dccph_seq); if (dh->dccph_x != 0) - seq_nr = (seq_nr << 32) + ntohl(dccp_hdrx(skb)->dccph_seq_low); + seq_nr = (seq_nr << 32) + ntohl(dccp_hdrx(dh)->dccph_seq_low); else seq_nr += (u32)dh->dccph_seq2 << 16; |
