Commit | Line | Data |
---|---|---|
9fb9cbb1 YK |
1 | /* (C) 1999-2001 Paul `Rusty' Russell |
2 | * (C) 2002-2004 Netfilter Core Team <coreteam@netfilter.org> | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify | |
5 | * it under the terms of the GNU General Public License version 2 as | |
6 | * published by the Free Software Foundation. | |
9fb9cbb1 YK |
7 | */ |
8 | ||
9fb9cbb1 YK |
9 | #include <linux/types.h> |
10 | #include <linux/ip.h> | |
11 | #include <linux/netfilter.h> | |
12 | #include <linux/module.h> | |
13 | #include <linux/skbuff.h> | |
14 | #include <linux/icmp.h> | |
15 | #include <linux/sysctl.h> | |
0ae2cfe7 | 16 | #include <net/route.h> |
9fb9cbb1 YK |
17 | #include <net/ip.h> |
18 | ||
19 | #include <linux/netfilter_ipv4.h> | |
20 | #include <net/netfilter/nf_conntrack.h> | |
21 | #include <net/netfilter/nf_conntrack_helper.h> | |
605dcad6 | 22 | #include <net/netfilter/nf_conntrack_l4proto.h> |
9fb9cbb1 YK |
23 | #include <net/netfilter/nf_conntrack_l3proto.h> |
24 | #include <net/netfilter/nf_conntrack_core.h> | |
25 | #include <net/netfilter/ipv4/nf_conntrack_ipv4.h> | |
26 | ||
9fb9cbb1 YK |
27 | static int ipv4_pkt_to_tuple(const struct sk_buff *skb, unsigned int nhoff, |
28 | struct nf_conntrack_tuple *tuple) | |
29 | { | |
bff9a89b | 30 | __be32 _addrs[2], *ap; |
9fb9cbb1 YK |
31 | ap = skb_header_pointer(skb, nhoff + offsetof(struct iphdr, saddr), |
32 | sizeof(u_int32_t) * 2, _addrs); | |
33 | if (ap == NULL) | |
34 | return 0; | |
35 | ||
36 | tuple->src.u3.ip = ap[0]; | |
37 | tuple->dst.u3.ip = ap[1]; | |
38 | ||
39 | return 1; | |
40 | } | |
41 | ||
42 | static int ipv4_invert_tuple(struct nf_conntrack_tuple *tuple, | |
43 | const struct nf_conntrack_tuple *orig) | |
44 | { | |
45 | tuple->src.u3.ip = orig->dst.u3.ip; | |
46 | tuple->dst.u3.ip = orig->src.u3.ip; | |
47 | ||
48 | return 1; | |
49 | } | |
50 | ||
51 | static int ipv4_print_tuple(struct seq_file *s, | |
52 | const struct nf_conntrack_tuple *tuple) | |
53 | { | |
54 | return seq_printf(s, "src=%u.%u.%u.%u dst=%u.%u.%u.%u ", | |
e905a9ed | 55 | NIPQUAD(tuple->src.u3.ip), |
9fb9cbb1 YK |
56 | NIPQUAD(tuple->dst.u3.ip)); |
57 | } | |
58 | ||
59 | static int ipv4_print_conntrack(struct seq_file *s, | |
60 | const struct nf_conn *conntrack) | |
61 | { | |
62 | return 0; | |
63 | } | |
64 | ||
65 | /* Returns new sk_buff, or NULL */ | |
66 | static struct sk_buff * | |
67 | nf_ct_ipv4_gather_frags(struct sk_buff *skb, u_int32_t user) | |
68 | { | |
69 | skb_orphan(skb); | |
70 | ||
e905a9ed YH |
71 | local_bh_disable(); |
72 | skb = ip_defrag(skb, user); | |
73 | local_bh_enable(); | |
9fb9cbb1 | 74 | |
e905a9ed | 75 | if (skb) |
eddc9ec5 | 76 | ip_send_check(ip_hdr(skb)); |
9fb9cbb1 | 77 | |
e905a9ed | 78 | return skb; |
9fb9cbb1 YK |
79 | } |
80 | ||
ffc30690 YK |
81 | static int ipv4_get_l4proto(const struct sk_buff *skb, unsigned int nhoff, |
82 | unsigned int *dataoff, u_int8_t *protonum) | |
9fb9cbb1 | 83 | { |
ffc30690 YK |
84 | struct iphdr _iph, *iph; |
85 | ||
86 | iph = skb_header_pointer(skb, nhoff, sizeof(_iph), &_iph); | |
87 | if (iph == NULL) | |
88 | return -NF_DROP; | |
89 | ||
9fb9cbb1 | 90 | /* Never happen */ |
ffc30690 | 91 | if (iph->frag_off & htons(IP_OFFSET)) { |
9fb9cbb1 | 92 | if (net_ratelimit()) { |
ffc30690 YK |
93 | printk(KERN_ERR "ipv4_get_l4proto: Frag of proto %u\n", |
94 | iph->protocol); | |
9fb9cbb1 YK |
95 | } |
96 | return -NF_DROP; | |
97 | } | |
98 | ||
ffc30690 YK |
99 | *dataoff = nhoff + (iph->ihl << 2); |
100 | *protonum = iph->protocol; | |
9fb9cbb1 YK |
101 | |
102 | return NF_ACCEPT; | |
103 | } | |
104 | ||
9fb9cbb1 YK |
105 | static unsigned int ipv4_confirm(unsigned int hooknum, |
106 | struct sk_buff **pskb, | |
107 | const struct net_device *in, | |
108 | const struct net_device *out, | |
109 | int (*okfn)(struct sk_buff *)) | |
110 | { | |
111 | /* We've seen it coming out the other side: confirm it */ | |
112 | return nf_conntrack_confirm(pskb); | |
113 | } | |
114 | ||
115 | static unsigned int ipv4_conntrack_help(unsigned int hooknum, | |
116 | struct sk_buff **pskb, | |
117 | const struct net_device *in, | |
118 | const struct net_device *out, | |
119 | int (*okfn)(struct sk_buff *)) | |
120 | { | |
121 | struct nf_conn *ct; | |
122 | enum ip_conntrack_info ctinfo; | |
dc808fe2 | 123 | struct nf_conn_help *help; |
3c158f7f | 124 | struct nf_conntrack_helper *helper; |
9fb9cbb1 YK |
125 | |
126 | /* This is where we call the helper: as the packet goes out. */ | |
127 | ct = nf_ct_get(*pskb, &ctinfo); | |
6442f1cf | 128 | if (!ct || ctinfo == IP_CT_RELATED + IP_CT_IS_REPLY) |
dc808fe2 HW |
129 | return NF_ACCEPT; |
130 | ||
131 | help = nfct_help(ct); | |
3c158f7f | 132 | if (!help) |
dc808fe2 | 133 | return NF_ACCEPT; |
3c158f7f PM |
134 | /* rcu_read_lock()ed by nf_hook_slow */ |
135 | helper = rcu_dereference(help->helper); | |
136 | if (!helper) | |
137 | return NF_ACCEPT; | |
138 | return helper->help(pskb, skb_network_offset(*pskb) + ip_hdrlen(*pskb), | |
139 | ct, ctinfo); | |
9fb9cbb1 YK |
140 | } |
141 | ||
142 | static unsigned int ipv4_conntrack_defrag(unsigned int hooknum, | |
143 | struct sk_buff **pskb, | |
144 | const struct net_device *in, | |
145 | const struct net_device *out, | |
146 | int (*okfn)(struct sk_buff *)) | |
147 | { | |
9fb9cbb1 YK |
148 | /* Previously seen (loopback)? Ignore. Do this before |
149 | fragment check. */ | |
150 | if ((*pskb)->nfct) | |
151 | return NF_ACCEPT; | |
9fb9cbb1 YK |
152 | |
153 | /* Gather fragments. */ | |
eddc9ec5 | 154 | if (ip_hdr(*pskb)->frag_off & htons(IP_MF | IP_OFFSET)) { |
9fb9cbb1 YK |
155 | *pskb = nf_ct_ipv4_gather_frags(*pskb, |
156 | hooknum == NF_IP_PRE_ROUTING ? | |
157 | IP_DEFRAG_CONNTRACK_IN : | |
158 | IP_DEFRAG_CONNTRACK_OUT); | |
159 | if (!*pskb) | |
160 | return NF_STOLEN; | |
161 | } | |
162 | return NF_ACCEPT; | |
163 | } | |
164 | ||
9fb9cbb1 YK |
165 | static unsigned int ipv4_conntrack_in(unsigned int hooknum, |
166 | struct sk_buff **pskb, | |
167 | const struct net_device *in, | |
168 | const struct net_device *out, | |
169 | int (*okfn)(struct sk_buff *)) | |
170 | { | |
171 | return nf_conntrack_in(PF_INET, hooknum, pskb); | |
172 | } | |
173 | ||
174 | static unsigned int ipv4_conntrack_local(unsigned int hooknum, | |
e905a9ed YH |
175 | struct sk_buff **pskb, |
176 | const struct net_device *in, | |
177 | const struct net_device *out, | |
178 | int (*okfn)(struct sk_buff *)) | |
9fb9cbb1 YK |
179 | { |
180 | /* root is playing with raw sockets. */ | |
181 | if ((*pskb)->len < sizeof(struct iphdr) | |
c9bdd4b5 | 182 | || ip_hdrlen(*pskb) < sizeof(struct iphdr)) { |
9fb9cbb1 YK |
183 | if (net_ratelimit()) |
184 | printk("ipt_hook: happy cracking.\n"); | |
185 | return NF_ACCEPT; | |
186 | } | |
187 | return nf_conntrack_in(PF_INET, hooknum, pskb); | |
188 | } | |
189 | ||
190 | /* Connection tracking may drop packets, but never alters them, so | |
191 | make it the first hook. */ | |
964ddaa1 PM |
192 | static struct nf_hook_ops ipv4_conntrack_ops[] = { |
193 | { | |
194 | .hook = ipv4_conntrack_defrag, | |
195 | .owner = THIS_MODULE, | |
196 | .pf = PF_INET, | |
197 | .hooknum = NF_IP_PRE_ROUTING, | |
198 | .priority = NF_IP_PRI_CONNTRACK_DEFRAG, | |
199 | }, | |
200 | { | |
201 | .hook = ipv4_conntrack_in, | |
202 | .owner = THIS_MODULE, | |
203 | .pf = PF_INET, | |
204 | .hooknum = NF_IP_PRE_ROUTING, | |
205 | .priority = NF_IP_PRI_CONNTRACK, | |
206 | }, | |
207 | { | |
208 | .hook = ipv4_conntrack_defrag, | |
209 | .owner = THIS_MODULE, | |
210 | .pf = PF_INET, | |
211 | .hooknum = NF_IP_LOCAL_OUT, | |
212 | .priority = NF_IP_PRI_CONNTRACK_DEFRAG, | |
213 | }, | |
214 | { | |
215 | .hook = ipv4_conntrack_local, | |
216 | .owner = THIS_MODULE, | |
217 | .pf = PF_INET, | |
218 | .hooknum = NF_IP_LOCAL_OUT, | |
219 | .priority = NF_IP_PRI_CONNTRACK, | |
220 | }, | |
221 | { | |
222 | .hook = ipv4_conntrack_help, | |
223 | .owner = THIS_MODULE, | |
224 | .pf = PF_INET, | |
225 | .hooknum = NF_IP_POST_ROUTING, | |
226 | .priority = NF_IP_PRI_CONNTRACK_HELPER, | |
227 | }, | |
228 | { | |
229 | .hook = ipv4_conntrack_help, | |
230 | .owner = THIS_MODULE, | |
231 | .pf = PF_INET, | |
232 | .hooknum = NF_IP_LOCAL_IN, | |
233 | .priority = NF_IP_PRI_CONNTRACK_HELPER, | |
234 | }, | |
235 | { | |
236 | .hook = ipv4_confirm, | |
237 | .owner = THIS_MODULE, | |
238 | .pf = PF_INET, | |
239 | .hooknum = NF_IP_POST_ROUTING, | |
240 | .priority = NF_IP_PRI_CONNTRACK_CONFIRM, | |
241 | }, | |
242 | { | |
243 | .hook = ipv4_confirm, | |
244 | .owner = THIS_MODULE, | |
245 | .pf = PF_INET, | |
246 | .hooknum = NF_IP_LOCAL_IN, | |
247 | .priority = NF_IP_PRI_CONNTRACK_CONFIRM, | |
248 | }, | |
9fb9cbb1 YK |
249 | }; |
250 | ||
a999e683 PM |
251 | #if defined(CONFIG_SYSCTL) && defined(CONFIG_NF_CONNTRACK_PROC_COMPAT) |
252 | static int log_invalid_proto_min = 0; | |
253 | static int log_invalid_proto_max = 255; | |
254 | ||
255 | static ctl_table ip_ct_sysctl_table[] = { | |
256 | { | |
257 | .ctl_name = NET_IPV4_NF_CONNTRACK_MAX, | |
258 | .procname = "ip_conntrack_max", | |
259 | .data = &nf_conntrack_max, | |
260 | .maxlen = sizeof(int), | |
261 | .mode = 0644, | |
262 | .proc_handler = &proc_dointvec, | |
263 | }, | |
264 | { | |
265 | .ctl_name = NET_IPV4_NF_CONNTRACK_COUNT, | |
266 | .procname = "ip_conntrack_count", | |
267 | .data = &nf_conntrack_count, | |
268 | .maxlen = sizeof(int), | |
269 | .mode = 0444, | |
270 | .proc_handler = &proc_dointvec, | |
271 | }, | |
272 | { | |
273 | .ctl_name = NET_IPV4_NF_CONNTRACK_BUCKETS, | |
274 | .procname = "ip_conntrack_buckets", | |
275 | .data = &nf_conntrack_htable_size, | |
276 | .maxlen = sizeof(unsigned int), | |
277 | .mode = 0444, | |
278 | .proc_handler = &proc_dointvec, | |
279 | }, | |
280 | { | |
281 | .ctl_name = NET_IPV4_NF_CONNTRACK_CHECKSUM, | |
282 | .procname = "ip_conntrack_checksum", | |
283 | .data = &nf_conntrack_checksum, | |
284 | .maxlen = sizeof(int), | |
285 | .mode = 0644, | |
286 | .proc_handler = &proc_dointvec, | |
287 | }, | |
288 | { | |
289 | .ctl_name = NET_IPV4_NF_CONNTRACK_LOG_INVALID, | |
290 | .procname = "ip_conntrack_log_invalid", | |
291 | .data = &nf_ct_log_invalid, | |
292 | .maxlen = sizeof(unsigned int), | |
293 | .mode = 0644, | |
294 | .proc_handler = &proc_dointvec_minmax, | |
295 | .strategy = &sysctl_intvec, | |
296 | .extra1 = &log_invalid_proto_min, | |
297 | .extra2 = &log_invalid_proto_max, | |
298 | }, | |
299 | { | |
300 | .ctl_name = 0 | |
301 | } | |
302 | }; | |
303 | #endif /* CONFIG_SYSCTL && CONFIG_NF_CONNTRACK_PROC_COMPAT */ | |
304 | ||
9fb9cbb1 YK |
305 | /* Fast function for those who don't want to parse /proc (and I don't |
306 | blame them). */ | |
307 | /* Reversing the socket's dst/src point of view gives us the reply | |
308 | mapping. */ | |
309 | static int | |
310 | getorigdst(struct sock *sk, int optval, void __user *user, int *len) | |
311 | { | |
312 | struct inet_sock *inet = inet_sk(sk); | |
313 | struct nf_conntrack_tuple_hash *h; | |
314 | struct nf_conntrack_tuple tuple; | |
e905a9ed | 315 | |
9fb9cbb1 YK |
316 | NF_CT_TUPLE_U_BLANK(&tuple); |
317 | tuple.src.u3.ip = inet->rcv_saddr; | |
318 | tuple.src.u.tcp.port = inet->sport; | |
319 | tuple.dst.u3.ip = inet->daddr; | |
320 | tuple.dst.u.tcp.port = inet->dport; | |
321 | tuple.src.l3num = PF_INET; | |
322 | tuple.dst.protonum = IPPROTO_TCP; | |
323 | ||
324 | /* We only do TCP at the moment: is there a better way? */ | |
325 | if (strcmp(sk->sk_prot->name, "TCP")) { | |
0d53778e | 326 | pr_debug("SO_ORIGINAL_DST: Not a TCP socket\n"); |
9fb9cbb1 YK |
327 | return -ENOPROTOOPT; |
328 | } | |
329 | ||
330 | if ((unsigned int) *len < sizeof(struct sockaddr_in)) { | |
0d53778e PM |
331 | pr_debug("SO_ORIGINAL_DST: len %d not %Zu\n", |
332 | *len, sizeof(struct sockaddr_in)); | |
9fb9cbb1 YK |
333 | return -EINVAL; |
334 | } | |
335 | ||
330f7db5 | 336 | h = nf_conntrack_find_get(&tuple); |
9fb9cbb1 YK |
337 | if (h) { |
338 | struct sockaddr_in sin; | |
339 | struct nf_conn *ct = nf_ct_tuplehash_to_ctrack(h); | |
340 | ||
341 | sin.sin_family = AF_INET; | |
342 | sin.sin_port = ct->tuplehash[IP_CT_DIR_ORIGINAL] | |
343 | .tuple.dst.u.tcp.port; | |
344 | sin.sin_addr.s_addr = ct->tuplehash[IP_CT_DIR_ORIGINAL] | |
345 | .tuple.dst.u3.ip; | |
6c813c3f | 346 | memset(sin.sin_zero, 0, sizeof(sin.sin_zero)); |
9fb9cbb1 | 347 | |
0d53778e PM |
348 | pr_debug("SO_ORIGINAL_DST: %u.%u.%u.%u %u\n", |
349 | NIPQUAD(sin.sin_addr.s_addr), ntohs(sin.sin_port)); | |
9fb9cbb1 YK |
350 | nf_ct_put(ct); |
351 | if (copy_to_user(user, &sin, sizeof(sin)) != 0) | |
352 | return -EFAULT; | |
353 | else | |
354 | return 0; | |
355 | } | |
0d53778e PM |
356 | pr_debug("SO_ORIGINAL_DST: Can't find %u.%u.%u.%u/%u-%u.%u.%u.%u/%u.\n", |
357 | NIPQUAD(tuple.src.u3.ip), ntohs(tuple.src.u.tcp.port), | |
358 | NIPQUAD(tuple.dst.u3.ip), ntohs(tuple.dst.u.tcp.port)); | |
9fb9cbb1 YK |
359 | return -ENOENT; |
360 | } | |
361 | ||
e281db5c | 362 | #if defined(CONFIG_NF_CT_NETLINK) || defined(CONFIG_NF_CT_NETLINK_MODULE) |
c1d10adb PNA |
363 | |
364 | #include <linux/netfilter/nfnetlink.h> | |
365 | #include <linux/netfilter/nfnetlink_conntrack.h> | |
366 | ||
367 | static int ipv4_tuple_to_nfattr(struct sk_buff *skb, | |
368 | const struct nf_conntrack_tuple *tuple) | |
369 | { | |
370 | NFA_PUT(skb, CTA_IP_V4_SRC, sizeof(u_int32_t), | |
371 | &tuple->src.u3.ip); | |
372 | NFA_PUT(skb, CTA_IP_V4_DST, sizeof(u_int32_t), | |
373 | &tuple->dst.u3.ip); | |
374 | return 0; | |
375 | ||
376 | nfattr_failure: | |
377 | return -1; | |
378 | } | |
379 | ||
380 | static const size_t cta_min_ip[CTA_IP_MAX] = { | |
381 | [CTA_IP_V4_SRC-1] = sizeof(u_int32_t), | |
382 | [CTA_IP_V4_DST-1] = sizeof(u_int32_t), | |
383 | }; | |
384 | ||
385 | static int ipv4_nfattr_to_tuple(struct nfattr *tb[], | |
386 | struct nf_conntrack_tuple *t) | |
387 | { | |
388 | if (!tb[CTA_IP_V4_SRC-1] || !tb[CTA_IP_V4_DST-1]) | |
389 | return -EINVAL; | |
390 | ||
391 | if (nfattr_bad_size(tb, CTA_IP_MAX, cta_min_ip)) | |
392 | return -EINVAL; | |
393 | ||
bff9a89b PM |
394 | t->src.u3.ip = *(__be32 *)NFA_DATA(tb[CTA_IP_V4_SRC-1]); |
395 | t->dst.u3.ip = *(__be32 *)NFA_DATA(tb[CTA_IP_V4_DST-1]); | |
c1d10adb PNA |
396 | |
397 | return 0; | |
398 | } | |
399 | #endif | |
400 | ||
9fb9cbb1 YK |
401 | static struct nf_sockopt_ops so_getorigdst = { |
402 | .pf = PF_INET, | |
403 | .get_optmin = SO_ORIGINAL_DST, | |
404 | .get_optmax = SO_ORIGINAL_DST+1, | |
405 | .get = &getorigdst, | |
406 | }; | |
407 | ||
61075af5 | 408 | struct nf_conntrack_l3proto nf_conntrack_l3proto_ipv4 __read_mostly = { |
9fb9cbb1 YK |
409 | .l3proto = PF_INET, |
410 | .name = "ipv4", | |
411 | .pkt_to_tuple = ipv4_pkt_to_tuple, | |
412 | .invert_tuple = ipv4_invert_tuple, | |
413 | .print_tuple = ipv4_print_tuple, | |
414 | .print_conntrack = ipv4_print_conntrack, | |
ffc30690 | 415 | .get_l4proto = ipv4_get_l4proto, |
e281db5c | 416 | #if defined(CONFIG_NF_CT_NETLINK) || defined(CONFIG_NF_CT_NETLINK_MODULE) |
c1d10adb PNA |
417 | .tuple_to_nfattr = ipv4_tuple_to_nfattr, |
418 | .nfattr_to_tuple = ipv4_nfattr_to_tuple, | |
a999e683 PM |
419 | #endif |
420 | #if defined(CONFIG_SYSCTL) && defined(CONFIG_NF_CONNTRACK_PROC_COMPAT) | |
421 | .ctl_table_path = nf_net_ipv4_netfilter_sysctl_path, | |
422 | .ctl_table = ip_ct_sysctl_table, | |
c1d10adb | 423 | #endif |
9fb9cbb1 YK |
424 | .me = THIS_MODULE, |
425 | }; | |
426 | ||
32292a7f | 427 | MODULE_ALIAS("nf_conntrack-" __stringify(AF_INET)); |
d2483dde | 428 | MODULE_ALIAS("ip_conntrack"); |
32292a7f PM |
429 | MODULE_LICENSE("GPL"); |
430 | ||
431 | static int __init nf_conntrack_l3proto_ipv4_init(void) | |
9fb9cbb1 YK |
432 | { |
433 | int ret = 0; | |
434 | ||
32292a7f | 435 | need_conntrack(); |
9fb9cbb1 YK |
436 | |
437 | ret = nf_register_sockopt(&so_getorigdst); | |
438 | if (ret < 0) { | |
439 | printk(KERN_ERR "Unable to register netfilter socket option\n"); | |
32292a7f | 440 | return ret; |
9fb9cbb1 YK |
441 | } |
442 | ||
605dcad6 | 443 | ret = nf_conntrack_l4proto_register(&nf_conntrack_l4proto_tcp4); |
9fb9cbb1 YK |
444 | if (ret < 0) { |
445 | printk("nf_conntrack_ipv4: can't register tcp.\n"); | |
446 | goto cleanup_sockopt; | |
447 | } | |
448 | ||
605dcad6 | 449 | ret = nf_conntrack_l4proto_register(&nf_conntrack_l4proto_udp4); |
9fb9cbb1 YK |
450 | if (ret < 0) { |
451 | printk("nf_conntrack_ipv4: can't register udp.\n"); | |
452 | goto cleanup_tcp; | |
453 | } | |
454 | ||
605dcad6 | 455 | ret = nf_conntrack_l4proto_register(&nf_conntrack_l4proto_icmp); |
9fb9cbb1 YK |
456 | if (ret < 0) { |
457 | printk("nf_conntrack_ipv4: can't register icmp.\n"); | |
458 | goto cleanup_udp; | |
459 | } | |
460 | ||
461 | ret = nf_conntrack_l3proto_register(&nf_conntrack_l3proto_ipv4); | |
462 | if (ret < 0) { | |
463 | printk("nf_conntrack_ipv4: can't register ipv4\n"); | |
464 | goto cleanup_icmp; | |
465 | } | |
466 | ||
964ddaa1 PM |
467 | ret = nf_register_hooks(ipv4_conntrack_ops, |
468 | ARRAY_SIZE(ipv4_conntrack_ops)); | |
9fb9cbb1 | 469 | if (ret < 0) { |
964ddaa1 | 470 | printk("nf_conntrack_ipv4: can't register hooks.\n"); |
9fb9cbb1 YK |
471 | goto cleanup_ipv4; |
472 | } | |
e4bd8bce PM |
473 | #if defined(CONFIG_PROC_FS) && defined(CONFIG_NF_CONNTRACK_PROC_COMPAT) |
474 | ret = nf_conntrack_ipv4_compat_init(); | |
475 | if (ret < 0) | |
476 | goto cleanup_hooks; | |
477 | #endif | |
9fb9cbb1 | 478 | return ret; |
e4bd8bce PM |
479 | #if defined(CONFIG_PROC_FS) && defined(CONFIG_NF_CONNTRACK_PROC_COMPAT) |
480 | cleanup_hooks: | |
e905a9ed | 481 | nf_unregister_hooks(ipv4_conntrack_ops, ARRAY_SIZE(ipv4_conntrack_ops)); |
e4bd8bce | 482 | #endif |
9fb9cbb1 YK |
483 | cleanup_ipv4: |
484 | nf_conntrack_l3proto_unregister(&nf_conntrack_l3proto_ipv4); | |
485 | cleanup_icmp: | |
605dcad6 | 486 | nf_conntrack_l4proto_unregister(&nf_conntrack_l4proto_icmp); |
9fb9cbb1 | 487 | cleanup_udp: |
605dcad6 | 488 | nf_conntrack_l4proto_unregister(&nf_conntrack_l4proto_udp4); |
9fb9cbb1 | 489 | cleanup_tcp: |
605dcad6 | 490 | nf_conntrack_l4proto_unregister(&nf_conntrack_l4proto_tcp4); |
9fb9cbb1 YK |
491 | cleanup_sockopt: |
492 | nf_unregister_sockopt(&so_getorigdst); | |
9fb9cbb1 YK |
493 | return ret; |
494 | } | |
495 | ||
65b4b4e8 | 496 | static void __exit nf_conntrack_l3proto_ipv4_fini(void) |
9fb9cbb1 | 497 | { |
32292a7f | 498 | synchronize_net(); |
e4bd8bce PM |
499 | #if defined(CONFIG_PROC_FS) && defined(CONFIG_NF_CONNTRACK_PROC_COMPAT) |
500 | nf_conntrack_ipv4_compat_fini(); | |
501 | #endif | |
32292a7f PM |
502 | nf_unregister_hooks(ipv4_conntrack_ops, ARRAY_SIZE(ipv4_conntrack_ops)); |
503 | nf_conntrack_l3proto_unregister(&nf_conntrack_l3proto_ipv4); | |
605dcad6 MJ |
504 | nf_conntrack_l4proto_unregister(&nf_conntrack_l4proto_icmp); |
505 | nf_conntrack_l4proto_unregister(&nf_conntrack_l4proto_udp4); | |
506 | nf_conntrack_l4proto_unregister(&nf_conntrack_l4proto_tcp4); | |
32292a7f | 507 | nf_unregister_sockopt(&so_getorigdst); |
9fb9cbb1 YK |
508 | } |
509 | ||
65b4b4e8 AM |
510 | module_init(nf_conntrack_l3proto_ipv4_init); |
511 | module_exit(nf_conntrack_l3proto_ipv4_fini); | |
591e6206 PM |
512 | |
513 | void need_ipv4_conntrack(void) | |
514 | { | |
515 | return; | |
516 | } | |
517 | EXPORT_SYMBOL_GPL(need_ipv4_conntrack); |