mirrors/linux-stable
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git synced 2024-09-12 13:55:32 +00:00
Code Issues Releases Wiki Activity
linux-stable/net/netfilter/nf_conntrack_proto.c
Pablo Neira Ayuso 3c171f496e netfilter: bridge: add connection tracking system 
This patch adds basic connection tracking support for the bridge,
including initial IPv4 support.

This patch register two hooks to deal with the bridge forwarding path,
one from the bridge prerouting hook to call nf_conntrack_in(); and
another from the bridge postrouting hook to confirm the entry.

The conntrack bridge prerouting hook defragments packets before passing
them to nf_conntrack_in() to look up for an existing entry, otherwise a
new entry is allocated and it is attached to the skbuff. The conntrack
bridge postrouting hook confirms new conntrack entries, ie. if this is
the first packet seen, then it adds the entry to the hashtable and (if
needed) it refragments the skbuff into the original fragments, leaving
the geometry as is if possible. Exceptions are linearized skbuffs, eg.
skbuffs that are passed up to nfqueue and conntrack helpers, as well as
cloned skbuff for the local delivery (eg. tcpdump), also in case of
bridge port flooding (cloned skbuff too).

The packet defragmentation is done through the ip_defrag() call.  This
forces us to save the bridge control buffer, reset the IP control buffer
area and then restore it after call. This function also bumps the IP
fragmentation statistics, it would be probably desiderable to have
independent statistics for the bridge defragmentation/refragmentation.
The maximum fragment length is stored in the control buffer and it is
used to refragment the skbuff from the postrouting path.

The new fraglist splitter and fragment transformer APIs are used to
implement the bridge refragmentation code. The br_ip_fragment() function
drops the packet in case the maximum fragment size seen is larger than
the output port MTU.

This patchset follows the principle that conntrack should not drop
packets, so users can do it through policy via invalid state matching.

Like br_netfilter, there is no refragmentation for packets that are
passed up for local delivery, ie. prerouting -> input path. There are
calls to nf_reset() already in several spots in the stack since time ago
already, eg. af_packet, that show that skbuff fraglist handling from the
netif_rx path is supported already.

The helpers are called from the postrouting hook, before confirmation,
from there we may see packet floods to bridge ports. Then, although
unlikely, this may result in exercising the helpers many times for each
clone. It would be good to explore how to pass all the packets in a list
to the conntrack hook to do this handle only once for this case.

Thanks to Florian Westphal for handing me over an initial patchset
version to add support for conntrack bridge.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
2019-05-30 14:18:18 -07:00

681 lines
16 KiB
C
Raw Blame History

// SPDX-License-Identifier: GPL-2.0
#include <linux/types.h>
#include <linux/netfilter.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/mutex.h>
#include <linux/vmalloc.h>
#include <linux/stddef.h>
#include <linux/err.h>
#include <linux/percpu.h>
#include <linux/notifier.h>
#include <linux/kernel.h>
#include <linux/netdevice.h>
#include <net/netfilter/nf_conntrack.h>
#include <net/netfilter/nf_conntrack_l4proto.h>
#include <net/netfilter/nf_conntrack_core.h>
#include <net/netfilter/nf_conntrack_bridge.h>
#include <net/netfilter/nf_log.h>
#include <linux/ip.h>
#include <linux/icmp.h>
#include <linux/sysctl.h>
#include <net/route.h>
#include <net/ip.h>
#include <linux/netfilter_ipv4.h>
#include <linux/netfilter_ipv6.h>
#include <linux/netfilter_ipv6/ip6_tables.h>
#include <net/netfilter/nf_conntrack_helper.h>
#include <net/netfilter/nf_conntrack_zones.h>
#include <net/netfilter/nf_conntrack_seqadj.h>
#include <net/netfilter/ipv4/nf_conntrack_ipv4.h>
#include <net/netfilter/ipv6/nf_conntrack_ipv6.h>
#include <net/netfilter/nf_nat_helper.h>
#include <net/netfilter/ipv4/nf_defrag_ipv4.h>
#include <net/netfilter/ipv6/nf_defrag_ipv6.h>
#include <linux/ipv6.h>
#include <linux/in6.h>
#include <net/ipv6.h>
#include <net/inet_frag.h>
extern unsigned int nf_conntrack_net_id;
static DEFINE_MUTEX(nf_ct_proto_mutex);
#ifdef CONFIG_SYSCTL
__printf(5, 6)
void nf_l4proto_log_invalid(const struct sk_buff *skb,
struct net *net,
u16 pf, u8 protonum,
const char *fmt, ...)
{
struct va_format vaf;
va_list args;
if (net->ct.sysctl_log_invalid != protonum &&
net->ct.sysctl_log_invalid != IPPROTO_RAW)
return;
va_start(args, fmt);
vaf.fmt = fmt;
vaf.va = &args;
nf_log_packet(net, pf, 0, skb, NULL, NULL, NULL,
"nf_ct_proto_%d: %pV ", protonum, &vaf);
va_end(args);
}
EXPORT_SYMBOL_GPL(nf_l4proto_log_invalid);
__printf(3, 4)
void nf_ct_l4proto_log_invalid(const struct sk_buff *skb,
const struct nf_conn *ct,
const char *fmt, ...)
{
struct va_format vaf;
struct net *net;
va_list args;
net = nf_ct_net(ct);
if (likely(net->ct.sysctl_log_invalid == 0))
return;
va_start(args, fmt);
vaf.fmt = fmt;
vaf.va = &args;
nf_l4proto_log_invalid(skb, net, nf_ct_l3num(ct),
nf_ct_protonum(ct), "%pV", &vaf);
va_end(args);
}
EXPORT_SYMBOL_GPL(nf_ct_l4proto_log_invalid);
#endif
const struct nf_conntrack_l4proto *nf_ct_l4proto_find(u8 l4proto)
{
switch (l4proto) {
case IPPROTO_UDP: return &nf_conntrack_l4proto_udp;
case IPPROTO_TCP: return &nf_conntrack_l4proto_tcp;
case IPPROTO_ICMP: return &nf_conntrack_l4proto_icmp;
#ifdef CONFIG_NF_CT_PROTO_DCCP
case IPPROTO_DCCP: return &nf_conntrack_l4proto_dccp;
#endif
#ifdef CONFIG_NF_CT_PROTO_SCTP
case IPPROTO_SCTP: return &nf_conntrack_l4proto_sctp;
#endif
#ifdef CONFIG_NF_CT_PROTO_UDPLITE
case IPPROTO_UDPLITE: return &nf_conntrack_l4proto_udplite;
#endif
#ifdef CONFIG_NF_CT_PROTO_GRE
case IPPROTO_GRE: return &nf_conntrack_l4proto_gre;
#endif
#if IS_ENABLED(CONFIG_IPV6)
case IPPROTO_ICMPV6: return &nf_conntrack_l4proto_icmpv6;
#endif /* CONFIG_IPV6 */
}
return &nf_conntrack_l4proto_generic;
};
EXPORT_SYMBOL_GPL(nf_ct_l4proto_find);
unsigned int nf_confirm(struct sk_buff *skb, unsigned int protoff,
struct nf_conn *ct, enum ip_conntrack_info ctinfo)
{
const struct nf_conn_help *help;
help = nfct_help(ct);
if (help) {
const struct nf_conntrack_helper *helper;
int ret;
/* rcu_read_lock()ed by nf_hook_thresh */
helper = rcu_dereference(help->helper);
if (helper) {
ret = helper->help(skb,
protoff,
ct, ctinfo);
if (ret != NF_ACCEPT)
return ret;
}
}
if (test_bit(IPS_SEQ_ADJUST_BIT, &ct->status) &&
!nf_is_loopback_packet(skb)) {
if (!nf_ct_seq_adjust(skb, ct, ctinfo, protoff)) {
NF_CT_STAT_INC_ATOMIC(nf_ct_net(ct), drop);
return NF_DROP;
}
}
/* We've seen it coming out the other side: confirm it */
return nf_conntrack_confirm(skb);
}
EXPORT_SYMBOL_GPL(nf_confirm);
static unsigned int ipv4_confirm(void *priv,
struct sk_buff *skb,
const struct nf_hook_state *state)
{
enum ip_conntrack_info ctinfo;
struct nf_conn *ct;
ct = nf_ct_get(skb, &ctinfo);
if (!ct || ctinfo == IP_CT_RELATED_REPLY)
return nf_conntrack_confirm(skb);
return nf_confirm(skb,
skb_network_offset(skb) + ip_hdrlen(skb),
ct, ctinfo);
}
static unsigned int ipv4_conntrack_in(void *priv,
struct sk_buff *skb,
const struct nf_hook_state *state)
{
return nf_conntrack_in(skb, state);
}
static unsigned int ipv4_conntrack_local(void *priv,
struct sk_buff *skb,
const struct nf_hook_state *state)
{
if (ip_is_fragment(ip_hdr(skb))) { /* IP_NODEFRAG setsockopt set */
enum ip_conntrack_info ctinfo;
struct nf_conn *tmpl;
tmpl = nf_ct_get(skb, &ctinfo);
if (tmpl && nf_ct_is_template(tmpl)) {
/* when skipping ct, clear templates to avoid fooling
* later targets/matches
*/
skb->_nfct = 0;
nf_ct_put(tmpl);
}
return NF_ACCEPT;
}
return nf_conntrack_in(skb, state);
}
/* Connection tracking may drop packets, but never alters them, so
* make it the first hook.
*/
static const struct nf_hook_ops ipv4_conntrack_ops[] = {
{
.hook = ipv4_conntrack_in,
.pf = NFPROTO_IPV4,
.hooknum = NF_INET_PRE_ROUTING,
.priority = NF_IP_PRI_CONNTRACK,
},
{
.hook = ipv4_conntrack_local,
.pf = NFPROTO_IPV4,
.hooknum = NF_INET_LOCAL_OUT,
.priority = NF_IP_PRI_CONNTRACK,
},
{
.hook = ipv4_confirm,
.pf = NFPROTO_IPV4,
.hooknum = NF_INET_POST_ROUTING,
.priority = NF_IP_PRI_CONNTRACK_CONFIRM,
},
{
.hook = ipv4_confirm,
.pf = NFPROTO_IPV4,
.hooknum = NF_INET_LOCAL_IN,
.priority = NF_IP_PRI_CONNTRACK_CONFIRM,
},
};
/* Fast function for those who don't want to parse /proc (and I don't
* blame them).
* Reversing the socket's dst/src point of view gives us the reply
* mapping.
*/
static int
getorigdst(struct sock *sk, int optval, void __user *user, int *len)
{
const struct inet_sock *inet = inet_sk(sk);
const struct nf_conntrack_tuple_hash *h;
struct nf_conntrack_tuple tuple;
memset(&tuple, 0, sizeof(tuple));
lock_sock(sk);
tuple.src.u3.ip = inet->inet_rcv_saddr;
tuple.src.u.tcp.port = inet->inet_sport;
tuple.dst.u3.ip = inet->inet_daddr;
tuple.dst.u.tcp.port = inet->inet_dport;
tuple.src.l3num = PF_INET;
tuple.dst.protonum = sk->sk_protocol;
release_sock(sk);
/* We only do TCP and SCTP at the moment: is there a better way? */
if (tuple.dst.protonum != IPPROTO_TCP &&
tuple.dst.protonum != IPPROTO_SCTP) {
pr_debug("SO_ORIGINAL_DST: Not a TCP/SCTP socket\n");
return -ENOPROTOOPT;
}
if ((unsigned int)*len < sizeof(struct sockaddr_in)) {
pr_debug("SO_ORIGINAL_DST: len %d not %zu\n",
*len, sizeof(struct sockaddr_in));
return -EINVAL;
}
h = nf_conntrack_find_get(sock_net(sk), &nf_ct_zone_dflt, &tuple);
if (h) {
struct sockaddr_in sin;
struct nf_conn *ct = nf_ct_tuplehash_to_ctrack(h);
sin.sin_family = AF_INET;
sin.sin_port = ct->tuplehash[IP_CT_DIR_ORIGINAL]
.tuple.dst.u.tcp.port;
sin.sin_addr.s_addr = ct->tuplehash[IP_CT_DIR_ORIGINAL]
.tuple.dst.u3.ip;
memset(sin.sin_zero, 0, sizeof(sin.sin_zero));
pr_debug("SO_ORIGINAL_DST: %pI4 %u\n",
&sin.sin_addr.s_addr, ntohs(sin.sin_port));
nf_ct_put(ct);
if (copy_to_user(user, &sin, sizeof(sin)) != 0)
return -EFAULT;
else
return 0;
}
pr_debug("SO_ORIGINAL_DST: Can't find %pI4/%u-%pI4/%u.\n",
&tuple.src.u3.ip, ntohs(tuple.src.u.tcp.port),
&tuple.dst.u3.ip, ntohs(tuple.dst.u.tcp.port));
return -ENOENT;
}
static struct nf_sockopt_ops so_getorigdst = {
.pf = PF_INET,
.get_optmin = SO_ORIGINAL_DST,
.get_optmax = SO_ORIGINAL_DST + 1,
.get = getorigdst,
.owner = THIS_MODULE,
};
#if IS_ENABLED(CONFIG_IPV6)
static int
ipv6_getorigdst(struct sock *sk, int optval, void __user *user, int *len)
{
struct nf_conntrack_tuple tuple = { .src.l3num = NFPROTO_IPV6 };
const struct ipv6_pinfo *inet6 = inet6_sk(sk);
const struct inet_sock *inet = inet_sk(sk);
const struct nf_conntrack_tuple_hash *h;
struct sockaddr_in6 sin6;
struct nf_conn *ct;
__be32 flow_label;
int bound_dev_if;
lock_sock(sk);
tuple.src.u3.in6 = sk->sk_v6_rcv_saddr;
tuple.src.u.tcp.port = inet->inet_sport;
tuple.dst.u3.in6 = sk->sk_v6_daddr;
tuple.dst.u.tcp.port = inet->inet_dport;
tuple.dst.protonum = sk->sk_protocol;
bound_dev_if = sk->sk_bound_dev_if;
flow_label = inet6->flow_label;
release_sock(sk);
if (tuple.dst.protonum != IPPROTO_TCP &&
tuple.dst.protonum != IPPROTO_SCTP)
return -ENOPROTOOPT;
if (*len < 0 || (unsigned int)*len < sizeof(sin6))
return -EINVAL;
h = nf_conntrack_find_get(sock_net(sk), &nf_ct_zone_dflt, &tuple);
if (!h) {
pr_debug("IP6T_SO_ORIGINAL_DST: Can't find %pI6c/%u-%pI6c/%u.\n",
&tuple.src.u3.ip6, ntohs(tuple.src.u.tcp.port),
&tuple.dst.u3.ip6, ntohs(tuple.dst.u.tcp.port));
return -ENOENT;
}
ct = nf_ct_tuplehash_to_ctrack(h);
sin6.sin6_family = AF_INET6;
sin6.sin6_port = ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.u.tcp.port;
sin6.sin6_flowinfo = flow_label & IPV6_FLOWINFO_MASK;
memcpy(&sin6.sin6_addr,
&ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.u3.in6,
sizeof(sin6.sin6_addr));
nf_ct_put(ct);
sin6.sin6_scope_id = ipv6_iface_scope_id(&sin6.sin6_addr, bound_dev_if);
return copy_to_user(user, &sin6, sizeof(sin6)) ? -EFAULT : 0;
}
static struct nf_sockopt_ops so_getorigdst6 = {
.pf = NFPROTO_IPV6,
.get_optmin = IP6T_SO_ORIGINAL_DST,
.get_optmax = IP6T_SO_ORIGINAL_DST + 1,
.get = ipv6_getorigdst,
.owner = THIS_MODULE,
};
static unsigned int ipv6_confirm(void *priv,
struct sk_buff *skb,
const struct nf_hook_state *state)
{
struct nf_conn *ct;
enum ip_conntrack_info ctinfo;
unsigned char pnum = ipv6_hdr(skb)->nexthdr;
__be16 frag_off;
int protoff;
ct = nf_ct_get(skb, &ctinfo);
if (!ct || ctinfo == IP_CT_RELATED_REPLY)
return nf_conntrack_confirm(skb);
protoff = ipv6_skip_exthdr(skb, sizeof(struct ipv6hdr), &pnum,
&frag_off);
if (protoff < 0 || (frag_off & htons(~0x7)) != 0) {
pr_debug("proto header not found\n");
return nf_conntrack_confirm(skb);
}
return nf_confirm(skb, protoff, ct, ctinfo);
}
static unsigned int ipv6_conntrack_in(void *priv,
struct sk_buff *skb,
const struct nf_hook_state *state)
{
return nf_conntrack_in(skb, state);
}
static unsigned int ipv6_conntrack_local(void *priv,
struct sk_buff *skb,
const struct nf_hook_state *state)
{
return nf_conntrack_in(skb, state);
}
static const struct nf_hook_ops ipv6_conntrack_ops[] = {
{
.hook = ipv6_conntrack_in,
.pf = NFPROTO_IPV6,
.hooknum = NF_INET_PRE_ROUTING,
.priority = NF_IP6_PRI_CONNTRACK,
},
{
.hook = ipv6_conntrack_local,
.pf = NFPROTO_IPV6,
.hooknum = NF_INET_LOCAL_OUT,
.priority = NF_IP6_PRI_CONNTRACK,
},
{
.hook = ipv6_confirm,
.pf = NFPROTO_IPV6,
.hooknum = NF_INET_POST_ROUTING,
.priority = NF_IP6_PRI_LAST,
},
{
.hook = ipv6_confirm,
.pf = NFPROTO_IPV6,
.hooknum = NF_INET_LOCAL_IN,
.priority = NF_IP6_PRI_LAST - 1,
},
};
#endif
static int nf_ct_tcp_fixup(struct nf_conn *ct, void *_nfproto)
{
u8 nfproto = (unsigned long)_nfproto;
if (nf_ct_l3num(ct) != nfproto)
return 0;
if (nf_ct_protonum(ct) == IPPROTO_TCP &&
ct->proto.tcp.state == TCP_CONNTRACK_ESTABLISHED) {
ct->proto.tcp.seen[0].td_maxwin = 0;
ct->proto.tcp.seen[1].td_maxwin = 0;
}
return 0;
}
static struct nf_ct_bridge_info *nf_ct_bridge_info;
static int nf_ct_netns_do_get(struct net *net, u8 nfproto)
{
struct nf_conntrack_net *cnet = net_generic(net, nf_conntrack_net_id);
bool fixup_needed = false, retry = true;
int err = 0;
retry:
mutex_lock(&nf_ct_proto_mutex);
switch (nfproto) {
case NFPROTO_IPV4:
cnet->users4++;
if (cnet->users4 > 1)
goto out_unlock;
err = nf_defrag_ipv4_enable(net);
if (err) {
cnet->users4 = 0;
goto out_unlock;
}
err = nf_register_net_hooks(net, ipv4_conntrack_ops,
ARRAY_SIZE(ipv4_conntrack_ops));
if (err)
cnet->users4 = 0;
else
fixup_needed = true;
break;
#if IS_ENABLED(CONFIG_IPV6)
case NFPROTO_IPV6:
cnet->users6++;
if (cnet->users6 > 1)
goto out_unlock;
err = nf_defrag_ipv6_enable(net);
if (err < 0) {
cnet->users6 = 0;
goto out_unlock;
}
err = nf_register_net_hooks(net, ipv6_conntrack_ops,
ARRAY_SIZE(ipv6_conntrack_ops));
if (err)
cnet->users6 = 0;
else
fixup_needed = true;
break;
#endif
case NFPROTO_BRIDGE:
if (!nf_ct_bridge_info) {
if (!retry) {
err = -EPROTO;
goto out_unlock;
}
mutex_unlock(&nf_ct_proto_mutex);
request_module("nf_conntrack_bridge");
retry = false;
goto retry;
}
if (!try_module_get(nf_ct_bridge_info->me)) {
err = -EPROTO;
goto out_unlock;
}
cnet->users_bridge++;
if (cnet->users_bridge > 1)
goto out_unlock;
err = nf_register_net_hooks(net, nf_ct_bridge_info->ops,
nf_ct_bridge_info->ops_size);
if (err)
cnet->users_bridge = 0;
else
fixup_needed = true;
break;
default:
err = -EPROTO;
break;
}
out_unlock:
mutex_unlock(&nf_ct_proto_mutex);
if (fixup_needed)
nf_ct_iterate_cleanup_net(net, nf_ct_tcp_fixup,
(void *)(unsigned long)nfproto, 0, 0);
return err;
}
static void nf_ct_netns_do_put(struct net *net, u8 nfproto)
{
struct nf_conntrack_net *cnet = net_generic(net, nf_conntrack_net_id);
mutex_lock(&nf_ct_proto_mutex);
switch (nfproto) {
case NFPROTO_IPV4:
if (cnet->users4 && (--cnet->users4 == 0))
nf_unregister_net_hooks(net, ipv4_conntrack_ops,
ARRAY_SIZE(ipv4_conntrack_ops));
break;
#if IS_ENABLED(CONFIG_IPV6)
case NFPROTO_IPV6:
if (cnet->users6 && (--cnet->users6 == 0))
nf_unregister_net_hooks(net, ipv6_conntrack_ops,
ARRAY_SIZE(ipv6_conntrack_ops));
break;
#endif
case NFPROTO_BRIDGE:
if (!nf_ct_bridge_info)
break;
if (cnet->users_bridge && (--cnet->users_bridge == 0))
nf_unregister_net_hooks(net, nf_ct_bridge_info->ops,
nf_ct_bridge_info->ops_size);
module_put(nf_ct_bridge_info->me);
break;
}
mutex_unlock(&nf_ct_proto_mutex);
}
int nf_ct_netns_get(struct net *net, u8 nfproto)
{
int err;
if (nfproto == NFPROTO_INET) {
err = nf_ct_netns_do_get(net, NFPROTO_IPV4);
if (err < 0)
goto err1;
err = nf_ct_netns_do_get(net, NFPROTO_IPV6);
if (err < 0)
goto err2;
} else {
err = nf_ct_netns_do_get(net, nfproto);
if (err < 0)
goto err1;
}
return 0;
err2:
nf_ct_netns_put(net, NFPROTO_IPV4);
err1:
return err;
}
EXPORT_SYMBOL_GPL(nf_ct_netns_get);
void nf_ct_netns_put(struct net *net, uint8_t nfproto)
{
if (nfproto == NFPROTO_INET) {
nf_ct_netns_do_put(net, NFPROTO_IPV4);
nf_ct_netns_do_put(net, NFPROTO_IPV6);
} else {
nf_ct_netns_do_put(net, nfproto);
}
}
EXPORT_SYMBOL_GPL(nf_ct_netns_put);
void nf_ct_bridge_register(struct nf_ct_bridge_info *info)
{
WARN_ON(nf_ct_bridge_info);
mutex_lock(&nf_ct_proto_mutex);
nf_ct_bridge_info = info;
mutex_unlock(&nf_ct_proto_mutex);
}
EXPORT_SYMBOL_GPL(nf_ct_bridge_register);
void nf_ct_bridge_unregister(struct nf_ct_bridge_info *info)
{
WARN_ON(!nf_ct_bridge_info);
mutex_lock(&nf_ct_proto_mutex);
nf_ct_bridge_info = NULL;
mutex_unlock(&nf_ct_proto_mutex);
}
EXPORT_SYMBOL_GPL(nf_ct_bridge_unregister);
int nf_conntrack_proto_init(void)
{
int ret;
ret = nf_register_sockopt(&so_getorigdst);
if (ret < 0)
return ret;
#if IS_ENABLED(CONFIG_IPV6)
ret = nf_register_sockopt(&so_getorigdst6);
if (ret < 0)
goto cleanup_sockopt;
#endif
return ret;
#if IS_ENABLED(CONFIG_IPV6)
cleanup_sockopt:
nf_unregister_sockopt(&so_getorigdst6);
#endif
return ret;
}
void nf_conntrack_proto_fini(void)
{
nf_unregister_sockopt(&so_getorigdst);
#if IS_ENABLED(CONFIG_IPV6)
nf_unregister_sockopt(&so_getorigdst6);
#endif
}
void nf_conntrack_proto_pernet_init(struct net *net)
{
nf_conntrack_generic_init_net(net);
nf_conntrack_udp_init_net(net);
nf_conntrack_tcp_init_net(net);
nf_conntrack_icmp_init_net(net);
#if IS_ENABLED(CONFIG_IPV6)
nf_conntrack_icmpv6_init_net(net);
#endif
#ifdef CONFIG_NF_CT_PROTO_DCCP
nf_conntrack_dccp_init_net(net);
#endif
#ifdef CONFIG_NF_CT_PROTO_SCTP
nf_conntrack_sctp_init_net(net);
#endif
#ifdef CONFIG_NF_CT_PROTO_GRE
nf_conntrack_gre_init_net(net);
#endif
}
void nf_conntrack_proto_pernet_fini(struct net *net)
{
#ifdef CONFIG_NF_CT_PROTO_GRE
nf_ct_gre_keymap_flush(net);
#endif
}
module_param_call(hashsize, nf_conntrack_set_hashsize, param_get_uint,
&nf_conntrack_htable_size, 0600);
MODULE_ALIAS("ip_conntrack");
MODULE_ALIAS("nf_conntrack-" __stringify(AF_INET));
MODULE_ALIAS("nf_conntrack-" __stringify(AF_INET6));
MODULE_LICENSE("GPL");
Reference in a new issue View git blame Copy permalink