diff options
Diffstat (limited to 'net/ipv4/netfilter/ipt_SYNPROXY.c')
| -rw-r--r-- | net/ipv4/netfilter/ipt_SYNPROXY.c | 21 |
1 files changed, 14 insertions, 7 deletions
diff --git a/net/ipv4/netfilter/ipt_SYNPROXY.c b/net/ipv4/netfilter/ipt_SYNPROXY.c index c308ee0ee0bc..af2b69b6895f 100644 --- a/net/ipv4/netfilter/ipt_SYNPROXY.c +++ b/net/ipv4/netfilter/ipt_SYNPROXY.c @@ -293,12 +293,16 @@ synproxy_tg4(struct sk_buff *skb, const struct xt_action_param *par) XT_SYNPROXY_OPT_ECN); synproxy_send_client_synack(net, skb, th, &opts); - return NF_DROP; - + consume_skb(skb); + return NF_STOLEN; } else if (th->ack && !(th->fin || th->rst || th->syn)) { /* ACK from client */ - synproxy_recv_client_ack(net, skb, th, &opts, ntohl(th->seq)); - return NF_DROP; + if (synproxy_recv_client_ack(net, skb, th, &opts, ntohl(th->seq))) { + consume_skb(skb); + return NF_STOLEN; + } else { + return NF_DROP; + } } return XT_CONTINUE; @@ -367,10 +371,13 @@ static unsigned int ipv4_synproxy_hook(void *priv, * number match the one of first SYN. */ if (synproxy_recv_client_ack(net, skb, th, &opts, - ntohl(th->seq) + 1)) + ntohl(th->seq) + 1)) { this_cpu_inc(snet->stats->cookie_retrans); - - return NF_DROP; + consume_skb(skb); + return NF_STOLEN; + } else { + return NF_DROP; + } } synproxy->isn = ntohl(th->ack_seq); |