diff options
Diffstat (limited to 'net/ipv4/netfilter/ip_conntrack_proto_tcp.c')
| -rw-r--r-- | net/ipv4/netfilter/ip_conntrack_proto_tcp.c | 48 |
1 files changed, 38 insertions, 10 deletions
diff --git a/net/ipv4/netfilter/ip_conntrack_proto_tcp.c b/net/ipv4/netfilter/ip_conntrack_proto_tcp.c index 809dfed766d..f23ef1f88c4 100644 --- a/net/ipv4/netfilter/ip_conntrack_proto_tcp.c +++ b/net/ipv4/netfilter/ip_conntrack_proto_tcp.c @@ -336,6 +336,23 @@ static int tcp_print_conntrack(struct seq_file *s, return seq_printf(s, "%s ", tcp_conntrack_names[state]); } +#if defined(CONFIG_IP_NF_CONNTRACK_NETLINK) || \ + defined(CONFIG_IP_NF_CONNTRACK_NETLINK_MODULE) +static int tcp_to_nfattr(struct sk_buff *skb, struct nfattr *nfa, + const struct ip_conntrack *ct) +{ + read_lock_bh(&tcp_lock); + NFA_PUT(skb, CTA_PROTOINFO_TCP_STATE, sizeof(u_int8_t), + &ct->proto.tcp.state); + read_unlock_bh(&tcp_lock); + + return 0; + +nfattr_failure: + return -1; +} +#endif + static unsigned int get_conntrack_index(const struct tcphdr *tcph) { if (tcph->rst) return TCP_RST_SET; @@ -699,7 +716,7 @@ static int tcp_in_window(struct ip_ct_tcp *state, res = 1; } else { if (LOG_INVALID(IPPROTO_TCP)) - nf_log_packet(PF_INET, 0, skb, NULL, NULL, + nf_log_packet(PF_INET, 0, skb, NULL, NULL, NULL, "ip_ct_tcp: %s ", before(seq, sender->td_maxend + 1) ? after(end, sender->td_end - receiver->td_maxwin - 1) ? @@ -798,7 +815,7 @@ static int tcp_error(struct sk_buff *skb, sizeof(_tcph), &_tcph); if (th == NULL) { if (LOG_INVALID(IPPROTO_TCP)) - nf_log_packet(PF_INET, 0, skb, NULL, NULL, + nf_log_packet(PF_INET, 0, skb, NULL, NULL, NULL, "ip_ct_tcp: short packet "); return -NF_ACCEPT; } @@ -806,7 +823,7 @@ static int tcp_error(struct sk_buff *skb, /* Not whole TCP header or malformed packet */ if (th->doff*4 < sizeof(struct tcphdr) || tcplen < th->doff*4) { if (LOG_INVALID(IPPROTO_TCP)) - nf_log_packet(PF_INET, 0, skb, NULL, NULL, + nf_log_packet(PF_INET, 0, skb, NULL, NULL, NULL, "ip_ct_tcp: truncated/malformed packet "); return -NF_ACCEPT; } @@ -823,7 +840,7 @@ static int tcp_error(struct sk_buff *skb, skb->ip_summed == CHECKSUM_HW ? skb->csum : skb_checksum(skb, iph->ihl*4, tcplen, 0))) { if (LOG_INVALID(IPPROTO_TCP)) - nf_log_packet(PF_INET, 0, skb, NULL, NULL, + nf_log_packet(PF_INET, 0, skb, NULL, NULL, NULL, "ip_ct_tcp: bad TCP checksum "); return -NF_ACCEPT; } @@ -832,7 +849,7 @@ static int tcp_error(struct sk_buff *skb, tcpflags = (((u_int8_t *)th)[13] & ~(TH_ECE|TH_CWR)); if (!tcp_valid_flags[tcpflags]) { if (LOG_INVALID(IPPROTO_TCP)) - nf_log_packet(PF_INET, 0, skb, NULL, NULL, + nf_log_packet(PF_INET, 0, skb, NULL, NULL, NULL, "ip_ct_tcp: invalid TCP flag combination "); return -NF_ACCEPT; } @@ -880,8 +897,9 @@ static int tcp_packet(struct ip_conntrack *conntrack, */ write_unlock_bh(&tcp_lock); if (LOG_INVALID(IPPROTO_TCP)) - nf_log_packet(PF_INET, 0, skb, NULL, NULL, - "ip_ct_tcp: killing out of sync session "); + nf_log_packet(PF_INET, 0, skb, NULL, NULL, + NULL, "ip_ct_tcp: " + "killing out of sync session "); if (del_timer(&conntrack->timeout)) conntrack->timeout.function((unsigned long) conntrack); @@ -895,7 +913,7 @@ static int tcp_packet(struct ip_conntrack *conntrack, write_unlock_bh(&tcp_lock); if (LOG_INVALID(IPPROTO_TCP)) - nf_log_packet(PF_INET, 0, skb, NULL, NULL, + nf_log_packet(PF_INET, 0, skb, NULL, NULL, NULL, "ip_ct_tcp: invalid packet ignored "); return NF_ACCEPT; case TCP_CONNTRACK_MAX: @@ -905,7 +923,7 @@ static int tcp_packet(struct ip_conntrack *conntrack, old_state); write_unlock_bh(&tcp_lock); if (LOG_INVALID(IPPROTO_TCP)) - nf_log_packet(PF_INET, 0, skb, NULL, NULL, + nf_log_packet(PF_INET, 0, skb, NULL, NULL, NULL, "ip_ct_tcp: invalid state "); return -NF_ACCEPT; case TCP_CONNTRACK_SYN_SENT: @@ -926,7 +944,7 @@ static int tcp_packet(struct ip_conntrack *conntrack, write_unlock_bh(&tcp_lock); if (LOG_INVALID(IPPROTO_TCP)) nf_log_packet(PF_INET, 0, skb, NULL, NULL, - "ip_ct_tcp: invalid SYN"); + NULL, "ip_ct_tcp: invalid SYN"); return -NF_ACCEPT; } case TCP_CONNTRACK_CLOSE: @@ -973,6 +991,10 @@ static int tcp_packet(struct ip_conntrack *conntrack, ? ip_ct_tcp_timeout_max_retrans : *tcp_timeouts[new_state]; write_unlock_bh(&tcp_lock); + ip_conntrack_event_cache(IPCT_PROTOINFO_VOLATILE, skb); + if (new_state != old_state) + ip_conntrack_event_cache(IPCT_PROTOINFO, skb); + if (!test_bit(IPS_SEEN_REPLY_BIT, &conntrack->status)) { /* If only reply is a RST, we can consider ourselves not to have an established connection: this is a fairly common @@ -1096,4 +1118,10 @@ struct ip_conntrack_protocol ip_conntrack_protocol_tcp = .packet = tcp_packet, .new = tcp_new, .error = tcp_error, +#if defined(CONFIG_IP_NF_CONNTRACK_NETLINK) || \ + defined(CONFIG_IP_NF_CONNTRACK_NETLINK_MODULE) + .to_nfattr = tcp_to_nfattr, + .tuple_to_nfattr = ip_ct_port_tuple_to_nfattr, + .nfattr_to_tuple = ip_ct_port_nfattr_to_tuple, +#endif }; |