diff options
| author | Pablo Neira Ayuso <pablo@netfilter.org> | 2012-02-28 18:23:31 +0100 |
|---|---|---|
| committer | Pablo Neira Ayuso <pablo@netfilter.org> | 2012-03-07 17:41:19 +0100 |
| commit | 2c8503f55fbdfbeff4164f133df804cf4d316290 (patch) | |
| tree | fe491bc79fd59aa4b8b99ea63d13e62b6a2ef1cb /net/netfilter/nf_conntrack_proto_tcp.c | |
| parent | b888341c7f33035694f70428d7001d73f0b2a3b1 (diff) | |
netfilter: nf_conntrack: pass timeout array to l4->new and l4->packet
This patch defines a new interface for l4 protocol trackers:
unsigned int *(*get_timeouts)(struct net *net);
that is used to return the array of unsigned int that contains
the timeouts that will be applied for this flow. This is passed
to the l4proto->new(...) and l4proto->packet(...) functions to
specify the timeout policy.
This interface allows per-net global timeout configuration
(although only DCCP supports this by now) and it will allow
custom custom timeout configuration by means of follow-up
patches.
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Diffstat (limited to 'net/netfilter/nf_conntrack_proto_tcp.c')
| -rw-r--r-- | net/netfilter/nf_conntrack_proto_tcp.c | 22 |
1 files changed, 15 insertions, 7 deletions
diff --git a/net/netfilter/nf_conntrack_proto_tcp.c b/net/netfilter/nf_conntrack_proto_tcp.c index 57c77854609..8372bb43feb 100644 --- a/net/netfilter/nf_conntrack_proto_tcp.c +++ b/net/netfilter/nf_conntrack_proto_tcp.c @@ -813,13 +813,19 @@ static int tcp_error(struct net *net, struct nf_conn *tmpl, return NF_ACCEPT; } +static unsigned int *tcp_get_timeouts(struct net *net) +{ + return tcp_timeouts; +} + /* Returns verdict for packet, or -1 for invalid. */ static int tcp_packet(struct nf_conn *ct, const struct sk_buff *skb, unsigned int dataoff, enum ip_conntrack_info ctinfo, u_int8_t pf, - unsigned int hooknum) + unsigned int hooknum, + unsigned int *timeouts) { struct net *net = nf_ct_net(ct); struct nf_conntrack_tuple *tuple; @@ -1014,14 +1020,14 @@ static int tcp_packet(struct nf_conn *ct, ct->proto.tcp.seen[dir].flags |= IP_CT_TCP_FLAG_CLOSE_INIT; if (ct->proto.tcp.retrans >= nf_ct_tcp_max_retrans && - tcp_timeouts[new_state] > tcp_timeouts[TCP_CONNTRACK_RETRANS]) - timeout = tcp_timeouts[TCP_CONNTRACK_RETRANS]; + timeouts[new_state] > timeouts[TCP_CONNTRACK_RETRANS]) + timeout = timeouts[TCP_CONNTRACK_RETRANS]; else if ((ct->proto.tcp.seen[0].flags | ct->proto.tcp.seen[1].flags) & IP_CT_TCP_FLAG_DATA_UNACKNOWLEDGED && - tcp_timeouts[new_state] > tcp_timeouts[TCP_CONNTRACK_UNACK]) - timeout = tcp_timeouts[TCP_CONNTRACK_UNACK]; + timeouts[new_state] > timeouts[TCP_CONNTRACK_UNACK]) + timeout = timeouts[TCP_CONNTRACK_UNACK]; else - timeout = tcp_timeouts[new_state]; + timeout = timeouts[new_state]; spin_unlock_bh(&ct->lock); if (new_state != old_state) @@ -1053,7 +1059,7 @@ static int tcp_packet(struct nf_conn *ct, /* Called when a new connection for this protocol found. */ static bool tcp_new(struct nf_conn *ct, const struct sk_buff *skb, - unsigned int dataoff) + unsigned int dataoff, unsigned int *timeouts) { enum tcp_conntrack new_state; const struct tcphdr *th; @@ -1444,6 +1450,7 @@ struct nf_conntrack_l4proto nf_conntrack_l4proto_tcp4 __read_mostly = .print_tuple = tcp_print_tuple, .print_conntrack = tcp_print_conntrack, .packet = tcp_packet, + .get_timeouts = tcp_get_timeouts, .new = tcp_new, .error = tcp_error, #if IS_ENABLED(CONFIG_NF_CT_NETLINK) @@ -1476,6 +1483,7 @@ struct nf_conntrack_l4proto nf_conntrack_l4proto_tcp6 __read_mostly = .print_tuple = tcp_print_tuple, .print_conntrack = tcp_print_conntrack, .packet = tcp_packet, + .get_timeouts = tcp_get_timeouts, .new = tcp_new, .error = tcp_error, #if IS_ENABLED(CONFIG_NF_CT_NETLINK) |