diff options
| author |   Patrick McHardy <kaber@trash.net> | 2007-02-07 15:05:33 -0800 |
|---|---|---|
| committer |   David S. Miller <davem@sunset.davemloft.net> | 2007-02-08 12:39:10 -0800 |
| commit | a09113c2c8ec59a5cc228efa5869aade2b8f13f7 (patch) | |
| tree | df582dfa453cb8e1c6eb397062f60d69508c38fe /include | |
| parent | [NETFILTER]: Add SANE connection tracking helper (diff) | |
| download | linux-dev-a09113c2c8ec59a5cc228efa5869aade2b8f13f7.tar.xz linux-dev-a09113c2c8ec59a5cc228efa5869aade2b8f13f7.zip | |
[NETFILTER]: tcp conntrack: do liberal tracking for picked up connections
Do liberal tracking (only RSTs need to be in-window) for connections picked
up without seeing a SYN to deal with window scaling. Also change logging
of invalid packets not to log packets accepted by liberal tracking to avoid
spamming the logs.
Based on suggestion from James Ralston <ralston@pobox.com>
Signed-off-by: Patrick McHardy <kaber@trash.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/netfilter/nf_conntrack_tcp.h | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/include/linux/netfilter/nf_conntrack_tcp.h b/include/linux/netfilter/nf_conntrack_tcp.h index 2f4e98b90cc0..007af4c2770b 100644 --- a/include/linux/netfilter/nf_conntrack_tcp.h +++ b/include/linux/netfilter/nf_conntrack_tcp.h @@ -27,6 +27,9 @@ enum tcp_conntrack { /* This sender sent FIN first */ #define IP_CT_TCP_FLAG_CLOSE_INIT 0x04 +/* Be liberal in window checking */ +#define IP_CT_TCP_FLAG_BE_LIBERAL 0x08 + #ifdef __KERNEL__ struct ip_ct_tcp_state { @@ -34,7 +37,6 @@ struct ip_ct_tcp_state { u_int32_t td_maxend; /* max of ack + max(win, 1) */ u_int32_t td_maxwin; /* max(win) */ u_int8_t td_scale; /* window scale factor */ - u_int8_t loose; /* used when connection picked up from the middle */ u_int8_t flags; /* per direction options */ }; |