diff options
| author | Numan Siddique <nusiddiq@redhat.com> | 2020-11-16 18:31:26 +0530 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2020-11-20 09:53:48 -0800 |
| commit | e2ef5203c817a60bfb591343ffd851b6537370ff (patch) | |
| tree | c6a45770510a3e7907daa4da955e4a91151d89f0 /net/netfilter | |
| parent | 4082c502bf9c8a6afe4268c654d4e93ab7dfeb69 (diff) | |
net: openvswitch: Be liberal in tcp conntrack.
There is no easy way to distinguish if a conntracked tcp packet is
marked invalid because of tcp_in_window() check error or because
it doesn't belong to an existing connection. With this patch,
openvswitch sets liberal tcp flag for the established sessions so
that out of window packets are not marked invalid.
A helper function - nf_ct_set_tcp_be_liberal(nf_conn) is added which
sets this flag for both the directions of the nf_conn.
Suggested-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Numan Siddique <nusiddiq@redhat.com>
Acked-by: Florian Westphal <fw@strlen.de>
Link: https://lore.kernel.org/r/20201116130126.3065077-1-nusiddiq@redhat.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'net/netfilter')
| -rw-r--r-- | net/netfilter/nf_conntrack_proto_tcp.c | 6 |
1 files changed, 0 insertions, 6 deletions
diff --git a/net/netfilter/nf_conntrack_proto_tcp.c b/net/netfilter/nf_conntrack_proto_tcp.c index c8fb2187ad4b..811c6c9b59e1 100644 --- a/net/netfilter/nf_conntrack_proto_tcp.c +++ b/net/netfilter/nf_conntrack_proto_tcp.c @@ -834,12 +834,6 @@ static noinline bool tcp_new(struct nf_conn *ct, const struct sk_buff *skb, return true; } -static bool nf_conntrack_tcp_established(const struct nf_conn *ct) -{ - return ct->proto.tcp.state == TCP_CONNTRACK_ESTABLISHED && - test_bit(IPS_ASSURED_BIT, &ct->status); -} - /* Returns verdict for packet, or -1 for invalid. */ int nf_conntrack_tcp_packet(struct nf_conn *ct, struct sk_buff *skb, |