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Commit | Line | Data |
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73e4022f | 1 | |
9fb9cbb1 YK |
2 | /* (C) 1999-2001 Paul `Rusty' Russell |
3 | * (C) 2002-2004 Netfilter Core Team <coreteam@netfilter.org> | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify | |
6 | * it under the terms of the GNU General Public License version 2 as | |
7 | * published by the Free Software Foundation. | |
9fb9cbb1 YK |
8 | */ |
9 | ||
9fb9cbb1 YK |
10 | #include <linux/types.h> |
11 | #include <linux/ip.h> | |
12 | #include <linux/netfilter.h> | |
13 | #include <linux/module.h> | |
14 | #include <linux/skbuff.h> | |
15 | #include <linux/icmp.h> | |
16 | #include <linux/sysctl.h> | |
0ae2cfe7 | 17 | #include <net/route.h> |
9fb9cbb1 YK |
18 | #include <net/ip.h> |
19 | ||
20 | #include <linux/netfilter_ipv4.h> | |
21 | #include <net/netfilter/nf_conntrack.h> | |
22 | #include <net/netfilter/nf_conntrack_helper.h> | |
605dcad6 | 23 | #include <net/netfilter/nf_conntrack_l4proto.h> |
9fb9cbb1 YK |
24 | #include <net/netfilter/nf_conntrack_l3proto.h> |
25 | #include <net/netfilter/nf_conntrack_core.h> | |
26 | #include <net/netfilter/ipv4/nf_conntrack_ipv4.h> | |
dd13b010 | 27 | #include <net/netfilter/nf_nat_helper.h> |
73e4022f | 28 | #include <net/netfilter/ipv4/nf_defrag_ipv4.h> |
dd13b010 PM |
29 | |
30 | int (*nf_nat_seq_adjust_hook)(struct sk_buff *skb, | |
31 | struct nf_conn *ct, | |
32 | enum ip_conntrack_info ctinfo); | |
33 | EXPORT_SYMBOL_GPL(nf_nat_seq_adjust_hook); | |
9fb9cbb1 | 34 | |
8ce8439a JE |
35 | static bool ipv4_pkt_to_tuple(const struct sk_buff *skb, unsigned int nhoff, |
36 | struct nf_conntrack_tuple *tuple) | |
9fb9cbb1 | 37 | { |
32948588 JE |
38 | const __be32 *ap; |
39 | __be32 _addrs[2]; | |
9fb9cbb1 YK |
40 | ap = skb_header_pointer(skb, nhoff + offsetof(struct iphdr, saddr), |
41 | sizeof(u_int32_t) * 2, _addrs); | |
42 | if (ap == NULL) | |
8ce8439a | 43 | return false; |
9fb9cbb1 YK |
44 | |
45 | tuple->src.u3.ip = ap[0]; | |
46 | tuple->dst.u3.ip = ap[1]; | |
47 | ||
8ce8439a | 48 | return true; |
9fb9cbb1 YK |
49 | } |
50 | ||
8ce8439a JE |
51 | static bool ipv4_invert_tuple(struct nf_conntrack_tuple *tuple, |
52 | const struct nf_conntrack_tuple *orig) | |
9fb9cbb1 YK |
53 | { |
54 | tuple->src.u3.ip = orig->dst.u3.ip; | |
55 | tuple->dst.u3.ip = orig->src.u3.ip; | |
56 | ||
8ce8439a | 57 | return true; |
9fb9cbb1 YK |
58 | } |
59 | ||
60 | static int ipv4_print_tuple(struct seq_file *s, | |
61 | const struct nf_conntrack_tuple *tuple) | |
62 | { | |
63 | return seq_printf(s, "src=%u.%u.%u.%u dst=%u.%u.%u.%u ", | |
e905a9ed | 64 | NIPQUAD(tuple->src.u3.ip), |
9fb9cbb1 YK |
65 | NIPQUAD(tuple->dst.u3.ip)); |
66 | } | |
67 | ||
ffc30690 YK |
68 | static int ipv4_get_l4proto(const struct sk_buff *skb, unsigned int nhoff, |
69 | unsigned int *dataoff, u_int8_t *protonum) | |
9fb9cbb1 | 70 | { |
32948588 JE |
71 | const struct iphdr *iph; |
72 | struct iphdr _iph; | |
ffc30690 YK |
73 | |
74 | iph = skb_header_pointer(skb, nhoff, sizeof(_iph), &_iph); | |
75 | if (iph == NULL) | |
76 | return -NF_DROP; | |
77 | ||
0fb96701 PM |
78 | /* Conntrack defragments packets, we might still see fragments |
79 | * inside ICMP packets though. */ | |
80 | if (iph->frag_off & htons(IP_OFFSET)) | |
9fb9cbb1 | 81 | return -NF_DROP; |
9fb9cbb1 | 82 | |
ffc30690 YK |
83 | *dataoff = nhoff + (iph->ihl << 2); |
84 | *protonum = iph->protocol; | |
9fb9cbb1 YK |
85 | |
86 | return NF_ACCEPT; | |
87 | } | |
88 | ||
9fb9cbb1 | 89 | static unsigned int ipv4_confirm(unsigned int hooknum, |
3db05fea | 90 | struct sk_buff *skb, |
9fb9cbb1 YK |
91 | const struct net_device *in, |
92 | const struct net_device *out, | |
93 | int (*okfn)(struct sk_buff *)) | |
9fb9cbb1 YK |
94 | { |
95 | struct nf_conn *ct; | |
96 | enum ip_conntrack_info ctinfo; | |
32948588 JE |
97 | const struct nf_conn_help *help; |
98 | const struct nf_conntrack_helper *helper; | |
dd13b010 | 99 | unsigned int ret; |
9fb9cbb1 YK |
100 | |
101 | /* This is where we call the helper: as the packet goes out. */ | |
3db05fea | 102 | ct = nf_ct_get(skb, &ctinfo); |
6442f1cf | 103 | if (!ct || ctinfo == IP_CT_RELATED + IP_CT_IS_REPLY) |
dd13b010 | 104 | goto out; |
dc808fe2 HW |
105 | |
106 | help = nfct_help(ct); | |
3c158f7f | 107 | if (!help) |
dd13b010 PM |
108 | goto out; |
109 | ||
3c158f7f PM |
110 | /* rcu_read_lock()ed by nf_hook_slow */ |
111 | helper = rcu_dereference(help->helper); | |
112 | if (!helper) | |
dd13b010 PM |
113 | goto out; |
114 | ||
115 | ret = helper->help(skb, skb_network_offset(skb) + ip_hdrlen(skb), | |
116 | ct, ctinfo); | |
117 | if (ret != NF_ACCEPT) | |
118 | return ret; | |
119 | ||
120 | if (test_bit(IPS_SEQ_ADJUST_BIT, &ct->status)) { | |
121 | typeof(nf_nat_seq_adjust_hook) seq_adjust; | |
122 | ||
123 | seq_adjust = rcu_dereference(nf_nat_seq_adjust_hook); | |
124 | if (!seq_adjust || !seq_adjust(skb, ct, ctinfo)) | |
125 | return NF_DROP; | |
126 | } | |
127 | out: | |
128 | /* We've seen it coming out the other side: confirm it */ | |
129 | return nf_conntrack_confirm(skb); | |
9fb9cbb1 YK |
130 | } |
131 | ||
9fb9cbb1 | 132 | static unsigned int ipv4_conntrack_in(unsigned int hooknum, |
3db05fea | 133 | struct sk_buff *skb, |
9fb9cbb1 YK |
134 | const struct net_device *in, |
135 | const struct net_device *out, | |
136 | int (*okfn)(struct sk_buff *)) | |
137 | { | |
a702a65f | 138 | return nf_conntrack_in(dev_net(in), PF_INET, hooknum, skb); |
9fb9cbb1 YK |
139 | } |
140 | ||
141 | static unsigned int ipv4_conntrack_local(unsigned int hooknum, | |
3db05fea | 142 | struct sk_buff *skb, |
e905a9ed YH |
143 | const struct net_device *in, |
144 | const struct net_device *out, | |
145 | int (*okfn)(struct sk_buff *)) | |
9fb9cbb1 YK |
146 | { |
147 | /* root is playing with raw sockets. */ | |
3db05fea HX |
148 | if (skb->len < sizeof(struct iphdr) || |
149 | ip_hdrlen(skb) < sizeof(struct iphdr)) { | |
9fb9cbb1 YK |
150 | if (net_ratelimit()) |
151 | printk("ipt_hook: happy cracking.\n"); | |
152 | return NF_ACCEPT; | |
153 | } | |
a702a65f | 154 | return nf_conntrack_in(dev_net(out), PF_INET, hooknum, skb); |
9fb9cbb1 YK |
155 | } |
156 | ||
157 | /* Connection tracking may drop packets, but never alters them, so | |
158 | make it the first hook. */ | |
1999414a | 159 | static struct nf_hook_ops ipv4_conntrack_ops[] __read_mostly = { |
964ddaa1 PM |
160 | { |
161 | .hook = ipv4_conntrack_in, | |
162 | .owner = THIS_MODULE, | |
163 | .pf = PF_INET, | |
6e23ae2a | 164 | .hooknum = NF_INET_PRE_ROUTING, |
964ddaa1 PM |
165 | .priority = NF_IP_PRI_CONNTRACK, |
166 | }, | |
964ddaa1 PM |
167 | { |
168 | .hook = ipv4_conntrack_local, | |
169 | .owner = THIS_MODULE, | |
170 | .pf = PF_INET, | |
6e23ae2a | 171 | .hooknum = NF_INET_LOCAL_OUT, |
964ddaa1 PM |
172 | .priority = NF_IP_PRI_CONNTRACK, |
173 | }, | |
964ddaa1 PM |
174 | { |
175 | .hook = ipv4_confirm, | |
176 | .owner = THIS_MODULE, | |
177 | .pf = PF_INET, | |
6e23ae2a | 178 | .hooknum = NF_INET_POST_ROUTING, |
964ddaa1 PM |
179 | .priority = NF_IP_PRI_CONNTRACK_CONFIRM, |
180 | }, | |
181 | { | |
182 | .hook = ipv4_confirm, | |
183 | .owner = THIS_MODULE, | |
184 | .pf = PF_INET, | |
6e23ae2a | 185 | .hooknum = NF_INET_LOCAL_IN, |
964ddaa1 PM |
186 | .priority = NF_IP_PRI_CONNTRACK_CONFIRM, |
187 | }, | |
9fb9cbb1 YK |
188 | }; |
189 | ||
a999e683 PM |
190 | #if defined(CONFIG_SYSCTL) && defined(CONFIG_NF_CONNTRACK_PROC_COMPAT) |
191 | static int log_invalid_proto_min = 0; | |
192 | static int log_invalid_proto_max = 255; | |
193 | ||
194 | static ctl_table ip_ct_sysctl_table[] = { | |
195 | { | |
196 | .ctl_name = NET_IPV4_NF_CONNTRACK_MAX, | |
197 | .procname = "ip_conntrack_max", | |
198 | .data = &nf_conntrack_max, | |
199 | .maxlen = sizeof(int), | |
200 | .mode = 0644, | |
201 | .proc_handler = &proc_dointvec, | |
202 | }, | |
203 | { | |
204 | .ctl_name = NET_IPV4_NF_CONNTRACK_COUNT, | |
205 | .procname = "ip_conntrack_count", | |
49ac8713 | 206 | .data = &init_net.ct.count, |
a999e683 PM |
207 | .maxlen = sizeof(int), |
208 | .mode = 0444, | |
209 | .proc_handler = &proc_dointvec, | |
210 | }, | |
211 | { | |
212 | .ctl_name = NET_IPV4_NF_CONNTRACK_BUCKETS, | |
213 | .procname = "ip_conntrack_buckets", | |
214 | .data = &nf_conntrack_htable_size, | |
215 | .maxlen = sizeof(unsigned int), | |
216 | .mode = 0444, | |
217 | .proc_handler = &proc_dointvec, | |
218 | }, | |
219 | { | |
220 | .ctl_name = NET_IPV4_NF_CONNTRACK_CHECKSUM, | |
221 | .procname = "ip_conntrack_checksum", | |
c04d0552 | 222 | .data = &init_net.ct.sysctl_checksum, |
a999e683 PM |
223 | .maxlen = sizeof(int), |
224 | .mode = 0644, | |
225 | .proc_handler = &proc_dointvec, | |
226 | }, | |
227 | { | |
228 | .ctl_name = NET_IPV4_NF_CONNTRACK_LOG_INVALID, | |
229 | .procname = "ip_conntrack_log_invalid", | |
c2a2c7e0 | 230 | .data = &init_net.ct.sysctl_log_invalid, |
a999e683 PM |
231 | .maxlen = sizeof(unsigned int), |
232 | .mode = 0644, | |
233 | .proc_handler = &proc_dointvec_minmax, | |
234 | .strategy = &sysctl_intvec, | |
235 | .extra1 = &log_invalid_proto_min, | |
236 | .extra2 = &log_invalid_proto_max, | |
237 | }, | |
238 | { | |
239 | .ctl_name = 0 | |
240 | } | |
241 | }; | |
242 | #endif /* CONFIG_SYSCTL && CONFIG_NF_CONNTRACK_PROC_COMPAT */ | |
243 | ||
9fb9cbb1 YK |
244 | /* Fast function for those who don't want to parse /proc (and I don't |
245 | blame them). */ | |
246 | /* Reversing the socket's dst/src point of view gives us the reply | |
247 | mapping. */ | |
248 | static int | |
249 | getorigdst(struct sock *sk, int optval, void __user *user, int *len) | |
250 | { | |
32948588 JE |
251 | const struct inet_sock *inet = inet_sk(sk); |
252 | const struct nf_conntrack_tuple_hash *h; | |
9fb9cbb1 | 253 | struct nf_conntrack_tuple tuple; |
e905a9ed | 254 | |
443a70d5 | 255 | memset(&tuple, 0, sizeof(tuple)); |
9fb9cbb1 YK |
256 | tuple.src.u3.ip = inet->rcv_saddr; |
257 | tuple.src.u.tcp.port = inet->sport; | |
258 | tuple.dst.u3.ip = inet->daddr; | |
259 | tuple.dst.u.tcp.port = inet->dport; | |
260 | tuple.src.l3num = PF_INET; | |
261 | tuple.dst.protonum = IPPROTO_TCP; | |
262 | ||
263 | /* We only do TCP at the moment: is there a better way? */ | |
264 | if (strcmp(sk->sk_prot->name, "TCP")) { | |
0d53778e | 265 | pr_debug("SO_ORIGINAL_DST: Not a TCP socket\n"); |
9fb9cbb1 YK |
266 | return -ENOPROTOOPT; |
267 | } | |
268 | ||
269 | if ((unsigned int) *len < sizeof(struct sockaddr_in)) { | |
0d53778e PM |
270 | pr_debug("SO_ORIGINAL_DST: len %d not %Zu\n", |
271 | *len, sizeof(struct sockaddr_in)); | |
9fb9cbb1 YK |
272 | return -EINVAL; |
273 | } | |
274 | ||
400dad39 | 275 | h = nf_conntrack_find_get(sock_net(sk), &tuple); |
9fb9cbb1 YK |
276 | if (h) { |
277 | struct sockaddr_in sin; | |
278 | struct nf_conn *ct = nf_ct_tuplehash_to_ctrack(h); | |
279 | ||
280 | sin.sin_family = AF_INET; | |
281 | sin.sin_port = ct->tuplehash[IP_CT_DIR_ORIGINAL] | |
282 | .tuple.dst.u.tcp.port; | |
283 | sin.sin_addr.s_addr = ct->tuplehash[IP_CT_DIR_ORIGINAL] | |
284 | .tuple.dst.u3.ip; | |
6c813c3f | 285 | memset(sin.sin_zero, 0, sizeof(sin.sin_zero)); |
9fb9cbb1 | 286 | |
0d53778e PM |
287 | pr_debug("SO_ORIGINAL_DST: %u.%u.%u.%u %u\n", |
288 | NIPQUAD(sin.sin_addr.s_addr), ntohs(sin.sin_port)); | |
9fb9cbb1 YK |
289 | nf_ct_put(ct); |
290 | if (copy_to_user(user, &sin, sizeof(sin)) != 0) | |
291 | return -EFAULT; | |
292 | else | |
293 | return 0; | |
294 | } | |
0d53778e PM |
295 | pr_debug("SO_ORIGINAL_DST: Can't find %u.%u.%u.%u/%u-%u.%u.%u.%u/%u.\n", |
296 | NIPQUAD(tuple.src.u3.ip), ntohs(tuple.src.u.tcp.port), | |
297 | NIPQUAD(tuple.dst.u3.ip), ntohs(tuple.dst.u.tcp.port)); | |
9fb9cbb1 YK |
298 | return -ENOENT; |
299 | } | |
300 | ||
e281db5c | 301 | #if defined(CONFIG_NF_CT_NETLINK) || defined(CONFIG_NF_CT_NETLINK_MODULE) |
c1d10adb PNA |
302 | |
303 | #include <linux/netfilter/nfnetlink.h> | |
304 | #include <linux/netfilter/nfnetlink_conntrack.h> | |
305 | ||
fdf70832 | 306 | static int ipv4_tuple_to_nlattr(struct sk_buff *skb, |
c1d10adb PNA |
307 | const struct nf_conntrack_tuple *tuple) |
308 | { | |
77236b6e PM |
309 | NLA_PUT_BE32(skb, CTA_IP_V4_SRC, tuple->src.u3.ip); |
310 | NLA_PUT_BE32(skb, CTA_IP_V4_DST, tuple->dst.u3.ip); | |
c1d10adb PNA |
311 | return 0; |
312 | ||
df6fb868 | 313 | nla_put_failure: |
c1d10adb PNA |
314 | return -1; |
315 | } | |
316 | ||
f73e924c PM |
317 | static const struct nla_policy ipv4_nla_policy[CTA_IP_MAX+1] = { |
318 | [CTA_IP_V4_SRC] = { .type = NLA_U32 }, | |
319 | [CTA_IP_V4_DST] = { .type = NLA_U32 }, | |
c1d10adb PNA |
320 | }; |
321 | ||
fdf70832 | 322 | static int ipv4_nlattr_to_tuple(struct nlattr *tb[], |
c1d10adb PNA |
323 | struct nf_conntrack_tuple *t) |
324 | { | |
df6fb868 | 325 | if (!tb[CTA_IP_V4_SRC] || !tb[CTA_IP_V4_DST]) |
c1d10adb PNA |
326 | return -EINVAL; |
327 | ||
77236b6e PM |
328 | t->src.u3.ip = nla_get_be32(tb[CTA_IP_V4_SRC]); |
329 | t->dst.u3.ip = nla_get_be32(tb[CTA_IP_V4_DST]); | |
c1d10adb PNA |
330 | |
331 | return 0; | |
332 | } | |
333 | #endif | |
334 | ||
9fb9cbb1 YK |
335 | static struct nf_sockopt_ops so_getorigdst = { |
336 | .pf = PF_INET, | |
337 | .get_optmin = SO_ORIGINAL_DST, | |
338 | .get_optmax = SO_ORIGINAL_DST+1, | |
339 | .get = &getorigdst, | |
16fcec35 | 340 | .owner = THIS_MODULE, |
9fb9cbb1 YK |
341 | }; |
342 | ||
61075af5 | 343 | struct nf_conntrack_l3proto nf_conntrack_l3proto_ipv4 __read_mostly = { |
9fb9cbb1 YK |
344 | .l3proto = PF_INET, |
345 | .name = "ipv4", | |
346 | .pkt_to_tuple = ipv4_pkt_to_tuple, | |
347 | .invert_tuple = ipv4_invert_tuple, | |
348 | .print_tuple = ipv4_print_tuple, | |
ffc30690 | 349 | .get_l4proto = ipv4_get_l4proto, |
e281db5c | 350 | #if defined(CONFIG_NF_CT_NETLINK) || defined(CONFIG_NF_CT_NETLINK_MODULE) |
fdf70832 PM |
351 | .tuple_to_nlattr = ipv4_tuple_to_nlattr, |
352 | .nlattr_to_tuple = ipv4_nlattr_to_tuple, | |
f73e924c | 353 | .nla_policy = ipv4_nla_policy, |
a999e683 PM |
354 | #endif |
355 | #if defined(CONFIG_SYSCTL) && defined(CONFIG_NF_CONNTRACK_PROC_COMPAT) | |
356 | .ctl_table_path = nf_net_ipv4_netfilter_sysctl_path, | |
357 | .ctl_table = ip_ct_sysctl_table, | |
c1d10adb | 358 | #endif |
9fb9cbb1 YK |
359 | .me = THIS_MODULE, |
360 | }; | |
361 | ||
fae718dd PM |
362 | module_param_call(hashsize, nf_conntrack_set_hashsize, param_get_uint, |
363 | &nf_conntrack_htable_size, 0600); | |
364 | ||
32292a7f | 365 | MODULE_ALIAS("nf_conntrack-" __stringify(AF_INET)); |
d2483dde | 366 | MODULE_ALIAS("ip_conntrack"); |
32292a7f PM |
367 | MODULE_LICENSE("GPL"); |
368 | ||
369 | static int __init nf_conntrack_l3proto_ipv4_init(void) | |
9fb9cbb1 YK |
370 | { |
371 | int ret = 0; | |
372 | ||
32292a7f | 373 | need_conntrack(); |
73e4022f | 374 | nf_defrag_ipv4_enable(); |
9fb9cbb1 YK |
375 | |
376 | ret = nf_register_sockopt(&so_getorigdst); | |
377 | if (ret < 0) { | |
378 | printk(KERN_ERR "Unable to register netfilter socket option\n"); | |
32292a7f | 379 | return ret; |
9fb9cbb1 YK |
380 | } |
381 | ||
605dcad6 | 382 | ret = nf_conntrack_l4proto_register(&nf_conntrack_l4proto_tcp4); |
9fb9cbb1 YK |
383 | if (ret < 0) { |
384 | printk("nf_conntrack_ipv4: can't register tcp.\n"); | |
385 | goto cleanup_sockopt; | |
386 | } | |
387 | ||
605dcad6 | 388 | ret = nf_conntrack_l4proto_register(&nf_conntrack_l4proto_udp4); |
9fb9cbb1 YK |
389 | if (ret < 0) { |
390 | printk("nf_conntrack_ipv4: can't register udp.\n"); | |
391 | goto cleanup_tcp; | |
392 | } | |
393 | ||
605dcad6 | 394 | ret = nf_conntrack_l4proto_register(&nf_conntrack_l4proto_icmp); |
9fb9cbb1 YK |
395 | if (ret < 0) { |
396 | printk("nf_conntrack_ipv4: can't register icmp.\n"); | |
397 | goto cleanup_udp; | |
398 | } | |
399 | ||
400 | ret = nf_conntrack_l3proto_register(&nf_conntrack_l3proto_ipv4); | |
401 | if (ret < 0) { | |
402 | printk("nf_conntrack_ipv4: can't register ipv4\n"); | |
403 | goto cleanup_icmp; | |
404 | } | |
405 | ||
964ddaa1 PM |
406 | ret = nf_register_hooks(ipv4_conntrack_ops, |
407 | ARRAY_SIZE(ipv4_conntrack_ops)); | |
9fb9cbb1 | 408 | if (ret < 0) { |
964ddaa1 | 409 | printk("nf_conntrack_ipv4: can't register hooks.\n"); |
9fb9cbb1 YK |
410 | goto cleanup_ipv4; |
411 | } | |
e4bd8bce PM |
412 | #if defined(CONFIG_PROC_FS) && defined(CONFIG_NF_CONNTRACK_PROC_COMPAT) |
413 | ret = nf_conntrack_ipv4_compat_init(); | |
414 | if (ret < 0) | |
415 | goto cleanup_hooks; | |
416 | #endif | |
9fb9cbb1 | 417 | return ret; |
e4bd8bce PM |
418 | #if defined(CONFIG_PROC_FS) && defined(CONFIG_NF_CONNTRACK_PROC_COMPAT) |
419 | cleanup_hooks: | |
e905a9ed | 420 | nf_unregister_hooks(ipv4_conntrack_ops, ARRAY_SIZE(ipv4_conntrack_ops)); |
e4bd8bce | 421 | #endif |
9fb9cbb1 YK |
422 | cleanup_ipv4: |
423 | nf_conntrack_l3proto_unregister(&nf_conntrack_l3proto_ipv4); | |
424 | cleanup_icmp: | |
605dcad6 | 425 | nf_conntrack_l4proto_unregister(&nf_conntrack_l4proto_icmp); |
9fb9cbb1 | 426 | cleanup_udp: |
605dcad6 | 427 | nf_conntrack_l4proto_unregister(&nf_conntrack_l4proto_udp4); |
9fb9cbb1 | 428 | cleanup_tcp: |
605dcad6 | 429 | nf_conntrack_l4proto_unregister(&nf_conntrack_l4proto_tcp4); |
9fb9cbb1 YK |
430 | cleanup_sockopt: |
431 | nf_unregister_sockopt(&so_getorigdst); | |
9fb9cbb1 YK |
432 | return ret; |
433 | } | |
434 | ||
65b4b4e8 | 435 | static void __exit nf_conntrack_l3proto_ipv4_fini(void) |
9fb9cbb1 | 436 | { |
32292a7f | 437 | synchronize_net(); |
e4bd8bce PM |
438 | #if defined(CONFIG_PROC_FS) && defined(CONFIG_NF_CONNTRACK_PROC_COMPAT) |
439 | nf_conntrack_ipv4_compat_fini(); | |
440 | #endif | |
32292a7f PM |
441 | nf_unregister_hooks(ipv4_conntrack_ops, ARRAY_SIZE(ipv4_conntrack_ops)); |
442 | nf_conntrack_l3proto_unregister(&nf_conntrack_l3proto_ipv4); | |
605dcad6 MJ |
443 | nf_conntrack_l4proto_unregister(&nf_conntrack_l4proto_icmp); |
444 | nf_conntrack_l4proto_unregister(&nf_conntrack_l4proto_udp4); | |
445 | nf_conntrack_l4proto_unregister(&nf_conntrack_l4proto_tcp4); | |
32292a7f | 446 | nf_unregister_sockopt(&so_getorigdst); |
9fb9cbb1 YK |
447 | } |
448 | ||
65b4b4e8 AM |
449 | module_init(nf_conntrack_l3proto_ipv4_init); |
450 | module_exit(nf_conntrack_l3proto_ipv4_fini); | |
591e6206 PM |
451 | |
452 | void need_ipv4_conntrack(void) | |
453 | { | |
454 | return; | |
455 | } | |
456 | EXPORT_SYMBOL_GPL(need_ipv4_conntrack); |