From 0f417ce989f84cfd5418e3b316064bfbb2708196 Mon Sep 17 00:00:00 2001 From: Pablo Neira Ayuso Date: Mon, 17 Dec 2007 22:28:19 -0800 Subject: [PATCH] [NETFILTER]: ctnetlink: add support for master tuple event notification and dumping This patch adds support for master tuple event notification and dumping. Conntrackd needs this information to recover related connections appropriately. Signed-off-by: Pablo Neira Ayuso Signed-off-by: Patrick McHardy Signed-off-by: David S. Miller --- net/netfilter/nf_conntrack_netlink.c | 28 ++++++++++++++++++++++++++++ 1 file changed, 28 insertions(+) diff --git a/net/netfilter/nf_conntrack_netlink.c b/net/netfilter/nf_conntrack_netlink.c index d7da167ef1b8..94027c84be52 100644 --- a/net/netfilter/nf_conntrack_netlink.c +++ b/net/netfilter/nf_conntrack_netlink.c @@ -254,6 +254,29 @@ nla_put_failure: #define ctnetlink_dump_mark(a, b) (0) #endif +#define master_tuple(ct) &(ct->master->tuplehash[IP_CT_DIR_ORIGINAL].tuple) + +static inline int +ctnetlink_dump_master(struct sk_buff *skb, const struct nf_conn *ct) +{ + struct nlattr *nest_parms; + + if (!(ct->status & IPS_EXPECTED)) + return 0; + + nest_parms = nla_nest_start(skb, CTA_TUPLE_MASTER | NLA_F_NESTED); + if (!nest_parms) + goto nla_put_failure; + if (ctnetlink_dump_tuples(skb, master_tuple(ct)) < 0) + goto nla_put_failure; + nla_nest_end(skb, nest_parms); + + return 0; + +nla_put_failure: + return -1; +} + #ifdef CONFIG_NF_NAT_NEEDED static inline int dump_nat_seq_adj(struct sk_buff *skb, const struct nf_nat_seq *natseq, int type) @@ -371,6 +394,7 @@ ctnetlink_fill_info(struct sk_buff *skb, u32 pid, u32 seq, ctnetlink_dump_mark(skb, ct) < 0 || ctnetlink_dump_id(skb, ct) < 0 || ctnetlink_dump_use(skb, ct) < 0 || + ctnetlink_dump_master(skb, ct) < 0 || ctnetlink_dump_nat_seq_adj(skb, ct) < 0) goto nla_put_failure; @@ -475,6 +499,10 @@ static int ctnetlink_conntrack_event(struct notifier_block *this, ctnetlink_dump_counters(skb, ct, IP_CT_DIR_REPLY) < 0)) goto nla_put_failure; + if (events & IPCT_RELATED && + ctnetlink_dump_master(skb, ct) < 0) + goto nla_put_failure; + if (events & IPCT_NATSEQADJ && ctnetlink_dump_nat_seq_adj(skb, ct) < 0) goto nla_put_failure; -- 2.30.2