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- // 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);
- }
- static int nf_ct_netns_inet_get(struct net *net)
- {
- int err;
- err = nf_ct_netns_do_get(net, NFPROTO_IPV4);
- #if IS_ENABLED(CONFIG_IPV6)
- if (err < 0)
- goto err1;
- err = nf_ct_netns_do_get(net, NFPROTO_IPV6);
- if (err < 0)
- goto err2;
- return err;
- err2:
- nf_ct_netns_put(net, NFPROTO_IPV4);
- err1:
- #endif
- return err;
- }
- int nf_ct_netns_get(struct net *net, u8 nfproto)
- {
- int err;
- switch (nfproto) {
- case NFPROTO_INET:
- err = nf_ct_netns_inet_get(net);
- break;
- case NFPROTO_BRIDGE:
- err = nf_ct_netns_do_get(net, NFPROTO_BRIDGE);
- if (err < 0)
- return err;
- err = nf_ct_netns_inet_get(net);
- if (err < 0) {
- nf_ct_netns_put(net, NFPROTO_BRIDGE);
- return err;
- }
- break;
- default:
- err = nf_ct_netns_do_get(net, nfproto);
- break;
- }
- return err;
- }
- EXPORT_SYMBOL_GPL(nf_ct_netns_get);
- void nf_ct_netns_put(struct net *net, uint8_t nfproto)
- {
- switch (nfproto) {
- case NFPROTO_BRIDGE:
- nf_ct_netns_do_put(net, NFPROTO_BRIDGE);
- fallthrough;
- case NFPROTO_INET:
- nf_ct_netns_do_put(net, NFPROTO_IPV4);
- nf_ct_netns_do_put(net, NFPROTO_IPV6);
- break;
- default:
- nf_ct_netns_do_put(net, nfproto);
- break;
- }
- }
- 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_getorigdst);
- #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");
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