Commit | Line | Data |
---|---|---|
9fb9cbb1 YK |
1 | /* |
2 | * Copyright (C)2004 USAGI/WIDE Project | |
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. | |
7 | * | |
8 | * Author: | |
9 | * Yasuyuki Kozakai @USAGI <yasuyuki.kozakai@toshiba.co.jp> | |
9fb9cbb1 YK |
10 | */ |
11 | ||
9fb9cbb1 YK |
12 | #include <linux/types.h> |
13 | #include <linux/ipv6.h> | |
14 | #include <linux/in6.h> | |
15 | #include <linux/netfilter.h> | |
16 | #include <linux/module.h> | |
17 | #include <linux/skbuff.h> | |
18 | #include <linux/icmp.h> | |
9fb9cbb1 | 19 | #include <net/ipv6.h> |
04128f23 | 20 | #include <net/inet_frag.h> |
9fb9cbb1 | 21 | |
8fa9ff68 | 22 | #include <linux/netfilter_bridge.h> |
9fb9cbb1 | 23 | #include <linux/netfilter_ipv6.h> |
121d1e09 | 24 | #include <linux/netfilter_ipv6/ip6_tables.h> |
9fb9cbb1 YK |
25 | #include <net/netfilter/nf_conntrack.h> |
26 | #include <net/netfilter/nf_conntrack_helper.h> | |
605dcad6 | 27 | #include <net/netfilter/nf_conntrack_l4proto.h> |
9fb9cbb1 YK |
28 | #include <net/netfilter/nf_conntrack_l3proto.h> |
29 | #include <net/netfilter/nf_conntrack_core.h> | |
5d0aa2cc | 30 | #include <net/netfilter/nf_conntrack_zones.h> |
9d2493f8 | 31 | #include <net/netfilter/ipv6/nf_conntrack_ipv6.h> |
58a317f1 | 32 | #include <net/netfilter/nf_nat_helper.h> |
e97c3e27 | 33 | #include <net/netfilter/ipv6/nf_defrag_ipv6.h> |
74f7a655 | 34 | #include <net/netfilter/nf_log.h> |
9fb9cbb1 | 35 | |
8ce8439a JE |
36 | static bool ipv6_pkt_to_tuple(const struct sk_buff *skb, unsigned int nhoff, |
37 | struct nf_conntrack_tuple *tuple) | |
9fb9cbb1 | 38 | { |
32948588 JE |
39 | const u_int32_t *ap; |
40 | u_int32_t _addrs[8]; | |
9fb9cbb1 YK |
41 | |
42 | ap = skb_header_pointer(skb, nhoff + offsetof(struct ipv6hdr, saddr), | |
43 | sizeof(_addrs), _addrs); | |
44 | if (ap == NULL) | |
8ce8439a | 45 | return false; |
9fb9cbb1 YK |
46 | |
47 | memcpy(tuple->src.u3.ip6, ap, sizeof(tuple->src.u3.ip6)); | |
48 | memcpy(tuple->dst.u3.ip6, ap + 4, sizeof(tuple->dst.u3.ip6)); | |
49 | ||
8ce8439a | 50 | return true; |
9fb9cbb1 YK |
51 | } |
52 | ||
8ce8439a JE |
53 | static bool ipv6_invert_tuple(struct nf_conntrack_tuple *tuple, |
54 | const struct nf_conntrack_tuple *orig) | |
9fb9cbb1 YK |
55 | { |
56 | memcpy(tuple->src.u3.ip6, orig->dst.u3.ip6, sizeof(tuple->src.u3.ip6)); | |
57 | memcpy(tuple->dst.u3.ip6, orig->src.u3.ip6, sizeof(tuple->dst.u3.ip6)); | |
58 | ||
8ce8439a | 59 | return true; |
9fb9cbb1 YK |
60 | } |
61 | ||
62 | static int ipv6_print_tuple(struct seq_file *s, | |
63 | const struct nf_conntrack_tuple *tuple) | |
64 | { | |
5b095d98 | 65 | return seq_printf(s, "src=%pI6 dst=%pI6 ", |
0c6ce78a | 66 | tuple->src.u3.ip6, tuple->dst.u3.ip6); |
9fb9cbb1 YK |
67 | } |
68 | ||
ffc30690 YK |
69 | static int ipv6_get_l4proto(const struct sk_buff *skb, unsigned int nhoff, |
70 | unsigned int *dataoff, u_int8_t *protonum) | |
9fb9cbb1 | 71 | { |
ffc30690 | 72 | unsigned int extoff = nhoff + sizeof(struct ipv6hdr); |
2b60af01 | 73 | __be16 frag_off; |
ffc30690 | 74 | int protoff; |
2b60af01 | 75 | u8 nexthdr; |
ffc30690 YK |
76 | |
77 | if (skb_copy_bits(skb, nhoff + offsetof(struct ipv6hdr, nexthdr), | |
2b60af01 | 78 | &nexthdr, sizeof(nexthdr)) != 0) { |
ffc30690 YK |
79 | pr_debug("ip6_conntrack_core: can't get nexthdr\n"); |
80 | return -NF_ACCEPT; | |
81 | } | |
2b60af01 | 82 | protoff = ipv6_skip_exthdr(skb, extoff, &nexthdr, &frag_off); |
9fb9cbb1 | 83 | /* |
d7a769ff FF |
84 | * (protoff == skb->len) means the packet has not data, just |
85 | * IPv6 and possibly extensions headers, but it is tracked anyway | |
9fb9cbb1 | 86 | */ |
2b60af01 | 87 | if (protoff < 0 || (frag_off & htons(~0x7)) != 0) { |
0d53778e | 88 | pr_debug("ip6_conntrack_core: can't find proto in pkt\n"); |
9fb9cbb1 YK |
89 | return -NF_ACCEPT; |
90 | } | |
91 | ||
92 | *dataoff = protoff; | |
2b60af01 | 93 | *protonum = nexthdr; |
9fb9cbb1 YK |
94 | return NF_ACCEPT; |
95 | } | |
96 | ||
12f7a505 PNA |
97 | static unsigned int ipv6_helper(unsigned int hooknum, |
98 | struct sk_buff *skb, | |
99 | const struct net_device *in, | |
100 | const struct net_device *out, | |
101 | int (*okfn)(struct sk_buff *)) | |
9fb9cbb1 YK |
102 | { |
103 | struct nf_conn *ct; | |
32948588 JE |
104 | const struct nf_conn_help *help; |
105 | const struct nf_conntrack_helper *helper; | |
9fb9cbb1 | 106 | enum ip_conntrack_info ctinfo; |
4cdd3408 PM |
107 | __be16 frag_off; |
108 | int protoff; | |
109 | u8 nexthdr; | |
9fb9cbb1 YK |
110 | |
111 | /* This is where we call the helper: as the packet goes out. */ | |
3db05fea | 112 | ct = nf_ct_get(skb, &ctinfo); |
fb048833 | 113 | if (!ct || ctinfo == IP_CT_RELATED_REPLY) |
12f7a505 | 114 | return NF_ACCEPT; |
dc808fe2 HW |
115 | |
116 | help = nfct_help(ct); | |
3c158f7f | 117 | if (!help) |
12f7a505 | 118 | return NF_ACCEPT; |
3c158f7f PM |
119 | /* rcu_read_lock()ed by nf_hook_slow */ |
120 | helper = rcu_dereference(help->helper); | |
121 | if (!helper) | |
12f7a505 | 122 | return NF_ACCEPT; |
dc808fe2 | 123 | |
4cdd3408 PM |
124 | nexthdr = ipv6_hdr(skb)->nexthdr; |
125 | protoff = ipv6_skip_exthdr(skb, sizeof(struct ipv6hdr), &nexthdr, | |
126 | &frag_off); | |
127 | if (protoff < 0 || (frag_off & htons(~0x7)) != 0) { | |
0d53778e | 128 | pr_debug("proto header not found\n"); |
dc808fe2 | 129 | return NF_ACCEPT; |
9fb9cbb1 YK |
130 | } |
131 | ||
b20ab9cc | 132 | return helper->help(skb, protoff, ct, ctinfo); |
12f7a505 PNA |
133 | } |
134 | ||
135 | static unsigned int ipv6_confirm(unsigned int hooknum, | |
136 | struct sk_buff *skb, | |
137 | const struct net_device *in, | |
138 | const struct net_device *out, | |
139 | int (*okfn)(struct sk_buff *)) | |
140 | { | |
58a317f1 PM |
141 | struct nf_conn *ct; |
142 | enum ip_conntrack_info ctinfo; | |
143 | unsigned char pnum = ipv6_hdr(skb)->nexthdr; | |
144 | int protoff; | |
145 | __be16 frag_off; | |
146 | ||
147 | ct = nf_ct_get(skb, &ctinfo); | |
148 | if (!ct || ctinfo == IP_CT_RELATED_REPLY) | |
149 | goto out; | |
150 | ||
151 | protoff = ipv6_skip_exthdr(skb, sizeof(struct ipv6hdr), &pnum, | |
152 | &frag_off); | |
153 | if (protoff < 0 || (frag_off & htons(~0x7)) != 0) { | |
154 | pr_debug("proto header not found\n"); | |
155 | goto out; | |
156 | } | |
157 | ||
158 | /* adjust seqs for loopback traffic only in outgoing direction */ | |
159 | if (test_bit(IPS_SEQ_ADJUST_BIT, &ct->status) && | |
160 | !nf_is_loopback_packet(skb)) { | |
161 | typeof(nf_nat_seq_adjust_hook) seq_adjust; | |
162 | ||
163 | seq_adjust = rcu_dereference(nf_nat_seq_adjust_hook); | |
164 | if (!seq_adjust || | |
165 | !seq_adjust(skb, ct, ctinfo, protoff)) { | |
166 | NF_CT_STAT_INC_ATOMIC(nf_ct_net(ct), drop); | |
167 | return NF_DROP; | |
168 | } | |
169 | } | |
170 | out: | |
9fb9cbb1 | 171 | /* We've seen it coming out the other side: confirm it */ |
3db05fea | 172 | return nf_conntrack_confirm(skb); |
9fb9cbb1 YK |
173 | } |
174 | ||
a702a65f AD |
175 | static unsigned int __ipv6_conntrack_in(struct net *net, |
176 | unsigned int hooknum, | |
177 | struct sk_buff *skb, | |
4cdd3408 PM |
178 | const struct net_device *in, |
179 | const struct net_device *out, | |
a702a65f | 180 | int (*okfn)(struct sk_buff *)) |
9fb9cbb1 | 181 | { |
3db05fea | 182 | struct sk_buff *reasm = skb->nfct_reasm; |
4cdd3408 PM |
183 | const struct nf_conn_help *help; |
184 | struct nf_conn *ct; | |
185 | enum ip_conntrack_info ctinfo; | |
9fb9cbb1 YK |
186 | |
187 | /* This packet is fragmented and has reassembled packet. */ | |
188 | if (reasm) { | |
189 | /* Reassembled packet isn't parsed yet ? */ | |
190 | if (!reasm->nfct) { | |
191 | unsigned int ret; | |
192 | ||
a702a65f | 193 | ret = nf_conntrack_in(net, PF_INET6, hooknum, reasm); |
9fb9cbb1 YK |
194 | if (ret != NF_ACCEPT) |
195 | return ret; | |
196 | } | |
4cdd3408 PM |
197 | |
198 | /* Conntrack helpers need the entire reassembled packet in the | |
58a317f1 PM |
199 | * POST_ROUTING hook. In case of unconfirmed connections NAT |
200 | * might reassign a helper, so the entire packet is also | |
201 | * required. | |
4cdd3408 PM |
202 | */ |
203 | ct = nf_ct_get(reasm, &ctinfo); | |
204 | if (ct != NULL && !nf_ct_is_untracked(ct)) { | |
205 | help = nfct_help(ct); | |
58a317f1 | 206 | if ((help && help->helper) || !nf_ct_is_confirmed(ct)) { |
4cdd3408 PM |
207 | nf_conntrack_get_reasm(skb); |
208 | NF_HOOK_THRESH(NFPROTO_IPV6, hooknum, reasm, | |
209 | (struct net_device *)in, | |
210 | (struct net_device *)out, | |
211 | okfn, NF_IP6_PRI_CONNTRACK + 1); | |
212 | return NF_DROP_ERR(-ECANCELED); | |
213 | } | |
214 | } | |
215 | ||
9fb9cbb1 | 216 | nf_conntrack_get(reasm->nfct); |
3db05fea HX |
217 | skb->nfct = reasm->nfct; |
218 | skb->nfctinfo = reasm->nfctinfo; | |
9fb9cbb1 YK |
219 | return NF_ACCEPT; |
220 | } | |
221 | ||
a702a65f AD |
222 | return nf_conntrack_in(net, PF_INET6, hooknum, skb); |
223 | } | |
224 | ||
225 | static unsigned int ipv6_conntrack_in(unsigned int hooknum, | |
226 | struct sk_buff *skb, | |
227 | const struct net_device *in, | |
228 | const struct net_device *out, | |
229 | int (*okfn)(struct sk_buff *)) | |
230 | { | |
4cdd3408 | 231 | return __ipv6_conntrack_in(dev_net(in), hooknum, skb, in, out, okfn); |
9fb9cbb1 YK |
232 | } |
233 | ||
234 | static unsigned int ipv6_conntrack_local(unsigned int hooknum, | |
3db05fea | 235 | struct sk_buff *skb, |
9fb9cbb1 YK |
236 | const struct net_device *in, |
237 | const struct net_device *out, | |
238 | int (*okfn)(struct sk_buff *)) | |
239 | { | |
240 | /* root is playing with raw sockets. */ | |
3db05fea | 241 | if (skb->len < sizeof(struct ipv6hdr)) { |
e87cc472 | 242 | net_notice_ratelimited("ipv6_conntrack_local: packet too short\n"); |
9fb9cbb1 YK |
243 | return NF_ACCEPT; |
244 | } | |
4cdd3408 | 245 | return __ipv6_conntrack_in(dev_net(out), hooknum, skb, in, out, okfn); |
9fb9cbb1 YK |
246 | } |
247 | ||
1999414a | 248 | static struct nf_hook_ops ipv6_conntrack_ops[] __read_mostly = { |
964ddaa1 PM |
249 | { |
250 | .hook = ipv6_conntrack_in, | |
251 | .owner = THIS_MODULE, | |
57750a22 | 252 | .pf = NFPROTO_IPV6, |
6e23ae2a | 253 | .hooknum = NF_INET_PRE_ROUTING, |
964ddaa1 PM |
254 | .priority = NF_IP6_PRI_CONNTRACK, |
255 | }, | |
256 | { | |
257 | .hook = ipv6_conntrack_local, | |
258 | .owner = THIS_MODULE, | |
57750a22 | 259 | .pf = NFPROTO_IPV6, |
6e23ae2a | 260 | .hooknum = NF_INET_LOCAL_OUT, |
964ddaa1 PM |
261 | .priority = NF_IP6_PRI_CONNTRACK, |
262 | }, | |
12f7a505 PNA |
263 | { |
264 | .hook = ipv6_helper, | |
265 | .owner = THIS_MODULE, | |
266 | .pf = NFPROTO_IPV6, | |
267 | .hooknum = NF_INET_POST_ROUTING, | |
268 | .priority = NF_IP6_PRI_CONNTRACK_HELPER, | |
269 | }, | |
964ddaa1 PM |
270 | { |
271 | .hook = ipv6_confirm, | |
272 | .owner = THIS_MODULE, | |
57750a22 | 273 | .pf = NFPROTO_IPV6, |
6e23ae2a | 274 | .hooknum = NF_INET_POST_ROUTING, |
964ddaa1 PM |
275 | .priority = NF_IP6_PRI_LAST, |
276 | }, | |
12f7a505 PNA |
277 | { |
278 | .hook = ipv6_helper, | |
279 | .owner = THIS_MODULE, | |
280 | .pf = NFPROTO_IPV6, | |
281 | .hooknum = NF_INET_LOCAL_IN, | |
282 | .priority = NF_IP6_PRI_CONNTRACK_HELPER, | |
283 | }, | |
964ddaa1 PM |
284 | { |
285 | .hook = ipv6_confirm, | |
286 | .owner = THIS_MODULE, | |
57750a22 | 287 | .pf = NFPROTO_IPV6, |
6e23ae2a | 288 | .hooknum = NF_INET_LOCAL_IN, |
964ddaa1 PM |
289 | .priority = NF_IP6_PRI_LAST-1, |
290 | }, | |
9fb9cbb1 YK |
291 | }; |
292 | ||
121d1e09 FW |
293 | static int |
294 | ipv6_getorigdst(struct sock *sk, int optval, void __user *user, int *len) | |
295 | { | |
296 | const struct inet_sock *inet = inet_sk(sk); | |
297 | const struct ipv6_pinfo *inet6 = inet6_sk(sk); | |
298 | const struct nf_conntrack_tuple_hash *h; | |
299 | struct sockaddr_in6 sin6; | |
300 | struct nf_conntrack_tuple tuple = { .src.l3num = NFPROTO_IPV6 }; | |
301 | struct nf_conn *ct; | |
302 | ||
303 | tuple.src.u3.in6 = inet6->rcv_saddr; | |
304 | tuple.src.u.tcp.port = inet->inet_sport; | |
305 | tuple.dst.u3.in6 = inet6->daddr; | |
306 | tuple.dst.u.tcp.port = inet->inet_dport; | |
307 | tuple.dst.protonum = sk->sk_protocol; | |
308 | ||
309 | if (sk->sk_protocol != IPPROTO_TCP && sk->sk_protocol != IPPROTO_SCTP) | |
310 | return -ENOPROTOOPT; | |
311 | ||
312 | if (*len < 0 || (unsigned int) *len < sizeof(sin6)) | |
313 | return -EINVAL; | |
314 | ||
315 | h = nf_conntrack_find_get(sock_net(sk), NF_CT_DEFAULT_ZONE, &tuple); | |
316 | if (!h) { | |
317 | pr_debug("IP6T_SO_ORIGINAL_DST: Can't find %pI6c/%u-%pI6c/%u.\n", | |
318 | &tuple.src.u3.ip6, ntohs(tuple.src.u.tcp.port), | |
319 | &tuple.dst.u3.ip6, ntohs(tuple.dst.u.tcp.port)); | |
320 | return -ENOENT; | |
321 | } | |
322 | ||
323 | ct = nf_ct_tuplehash_to_ctrack(h); | |
324 | ||
325 | sin6.sin6_family = AF_INET6; | |
326 | sin6.sin6_port = ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.u.tcp.port; | |
327 | sin6.sin6_flowinfo = inet6->flow_label & IPV6_FLOWINFO_MASK; | |
328 | memcpy(&sin6.sin6_addr, | |
329 | &ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.u3.in6, | |
330 | sizeof(sin6.sin6_addr)); | |
121d1e09 FW |
331 | |
332 | nf_ct_put(ct); | |
d3976a53 FW |
333 | |
334 | if (ipv6_addr_type(&sin6.sin6_addr) & IPV6_ADDR_LINKLOCAL) | |
335 | sin6.sin6_scope_id = sk->sk_bound_dev_if; | |
336 | else | |
337 | sin6.sin6_scope_id = 0; | |
338 | ||
121d1e09 FW |
339 | return copy_to_user(user, &sin6, sizeof(sin6)) ? -EFAULT : 0; |
340 | } | |
341 | ||
07a93626 | 342 | #if IS_ENABLED(CONFIG_NF_CT_NETLINK) |
c1d10adb PNA |
343 | |
344 | #include <linux/netfilter/nfnetlink.h> | |
345 | #include <linux/netfilter/nfnetlink_conntrack.h> | |
346 | ||
fdf70832 | 347 | static int ipv6_tuple_to_nlattr(struct sk_buff *skb, |
c1d10adb PNA |
348 | const struct nf_conntrack_tuple *tuple) |
349 | { | |
e549a6b3 DM |
350 | if (nla_put(skb, CTA_IP_V6_SRC, sizeof(u_int32_t) * 4, |
351 | &tuple->src.u3.ip6) || | |
352 | nla_put(skb, CTA_IP_V6_DST, sizeof(u_int32_t) * 4, | |
353 | &tuple->dst.u3.ip6)) | |
354 | goto nla_put_failure; | |
c1d10adb PNA |
355 | return 0; |
356 | ||
df6fb868 | 357 | nla_put_failure: |
c1d10adb PNA |
358 | return -1; |
359 | } | |
360 | ||
f73e924c PM |
361 | static const struct nla_policy ipv6_nla_policy[CTA_IP_MAX+1] = { |
362 | [CTA_IP_V6_SRC] = { .len = sizeof(u_int32_t)*4 }, | |
363 | [CTA_IP_V6_DST] = { .len = sizeof(u_int32_t)*4 }, | |
c1d10adb PNA |
364 | }; |
365 | ||
fdf70832 | 366 | static int ipv6_nlattr_to_tuple(struct nlattr *tb[], |
c1d10adb PNA |
367 | struct nf_conntrack_tuple *t) |
368 | { | |
df6fb868 | 369 | if (!tb[CTA_IP_V6_SRC] || !tb[CTA_IP_V6_DST]) |
c1d10adb PNA |
370 | return -EINVAL; |
371 | ||
df6fb868 | 372 | memcpy(&t->src.u3.ip6, nla_data(tb[CTA_IP_V6_SRC]), |
c1d10adb | 373 | sizeof(u_int32_t) * 4); |
df6fb868 | 374 | memcpy(&t->dst.u3.ip6, nla_data(tb[CTA_IP_V6_DST]), |
c1d10adb PNA |
375 | sizeof(u_int32_t) * 4); |
376 | ||
377 | return 0; | |
378 | } | |
a400c30e HE |
379 | |
380 | static int ipv6_nlattr_tuple_size(void) | |
381 | { | |
382 | return nla_policy_len(ipv6_nla_policy, CTA_IP_MAX + 1); | |
383 | } | |
c1d10adb PNA |
384 | #endif |
385 | ||
61075af5 | 386 | struct nf_conntrack_l3proto nf_conntrack_l3proto_ipv6 __read_mostly = { |
9fb9cbb1 YK |
387 | .l3proto = PF_INET6, |
388 | .name = "ipv6", | |
389 | .pkt_to_tuple = ipv6_pkt_to_tuple, | |
390 | .invert_tuple = ipv6_invert_tuple, | |
391 | .print_tuple = ipv6_print_tuple, | |
ffc30690 | 392 | .get_l4proto = ipv6_get_l4proto, |
07a93626 | 393 | #if IS_ENABLED(CONFIG_NF_CT_NETLINK) |
fdf70832 | 394 | .tuple_to_nlattr = ipv6_tuple_to_nlattr, |
a400c30e | 395 | .nlattr_tuple_size = ipv6_nlattr_tuple_size, |
fdf70832 | 396 | .nlattr_to_tuple = ipv6_nlattr_to_tuple, |
f73e924c | 397 | .nla_policy = ipv6_nla_policy, |
c1d10adb | 398 | #endif |
9fb9cbb1 YK |
399 | .me = THIS_MODULE, |
400 | }; | |
401 | ||
32292a7f PM |
402 | MODULE_ALIAS("nf_conntrack-" __stringify(AF_INET6)); |
403 | MODULE_LICENSE("GPL"); | |
404 | MODULE_AUTHOR("Yasuyuki KOZAKAI @USAGI <yasuyuki.kozakai@toshiba.co.jp>"); | |
405 | ||
121d1e09 FW |
406 | static struct nf_sockopt_ops so_getorigdst6 = { |
407 | .pf = NFPROTO_IPV6, | |
408 | .get_optmin = IP6T_SO_ORIGINAL_DST, | |
409 | .get_optmax = IP6T_SO_ORIGINAL_DST + 1, | |
410 | .get = ipv6_getorigdst, | |
411 | .owner = THIS_MODULE, | |
412 | }; | |
413 | ||
a7c439d3 | 414 | static int ipv6_net_init(struct net *net) |
9fb9cbb1 YK |
415 | { |
416 | int ret = 0; | |
417 | ||
c296bb4d | 418 | ret = nf_ct_l4proto_pernet_register(net, &nf_conntrack_l4proto_tcp6); |
9fb9cbb1 | 419 | if (ret < 0) { |
c296bb4d | 420 | pr_err("nf_conntrack_tcp6: pernet registration failed\n"); |
a7c439d3 | 421 | goto out; |
9fb9cbb1 | 422 | } |
c296bb4d | 423 | ret = nf_ct_l4proto_pernet_register(net, &nf_conntrack_l4proto_udp6); |
9fb9cbb1 | 424 | if (ret < 0) { |
c296bb4d | 425 | pr_err("nf_conntrack_udp6: pernet registration failed\n"); |
a7c439d3 | 426 | goto cleanup_tcp6; |
9fb9cbb1 | 427 | } |
c296bb4d | 428 | ret = nf_ct_l4proto_pernet_register(net, &nf_conntrack_l4proto_icmpv6); |
9fb9cbb1 | 429 | if (ret < 0) { |
c296bb4d | 430 | pr_err("nf_conntrack_icmp6: pernet registration failed\n"); |
a7c439d3 | 431 | goto cleanup_udp6; |
9fb9cbb1 | 432 | } |
6330750d | 433 | ret = nf_ct_l3proto_pernet_register(net, &nf_conntrack_l3proto_ipv6); |
9fb9cbb1 | 434 | if (ret < 0) { |
6330750d | 435 | pr_err("nf_conntrack_ipv6: pernet registration failed.\n"); |
9fb9cbb1 YK |
436 | goto cleanup_icmpv6; |
437 | } | |
a7c439d3 G |
438 | return 0; |
439 | cleanup_icmpv6: | |
c296bb4d | 440 | nf_ct_l4proto_pernet_unregister(net, &nf_conntrack_l4proto_icmpv6); |
a7c439d3 | 441 | cleanup_udp6: |
c296bb4d | 442 | nf_ct_l4proto_pernet_unregister(net, &nf_conntrack_l4proto_udp6); |
a7c439d3 | 443 | cleanup_tcp6: |
c296bb4d | 444 | nf_ct_l4proto_pernet_unregister(net, &nf_conntrack_l4proto_tcp6); |
a7c439d3 G |
445 | out: |
446 | return ret; | |
447 | } | |
9fb9cbb1 | 448 | |
a7c439d3 G |
449 | static void ipv6_net_exit(struct net *net) |
450 | { | |
6330750d | 451 | nf_ct_l3proto_pernet_unregister(net, &nf_conntrack_l3proto_ipv6); |
c296bb4d G |
452 | nf_ct_l4proto_pernet_unregister(net, &nf_conntrack_l4proto_icmpv6); |
453 | nf_ct_l4proto_pernet_unregister(net, &nf_conntrack_l4proto_udp6); | |
454 | nf_ct_l4proto_pernet_unregister(net, &nf_conntrack_l4proto_tcp6); | |
a7c439d3 G |
455 | } |
456 | ||
457 | static struct pernet_operations ipv6_net_ops = { | |
458 | .init = ipv6_net_init, | |
459 | .exit = ipv6_net_exit, | |
460 | }; | |
461 | ||
462 | static int __init nf_conntrack_l3proto_ipv6_init(void) | |
463 | { | |
464 | int ret = 0; | |
465 | ||
466 | need_conntrack(); | |
467 | nf_defrag_ipv6_enable(); | |
468 | ||
121d1e09 FW |
469 | ret = nf_register_sockopt(&so_getorigdst6); |
470 | if (ret < 0) { | |
471 | pr_err("Unable to register netfilter socket option\n"); | |
472 | return ret; | |
473 | } | |
474 | ||
a7c439d3 G |
475 | ret = register_pernet_subsys(&ipv6_net_ops); |
476 | if (ret < 0) | |
6330750d G |
477 | goto cleanup_sockopt; |
478 | ||
964ddaa1 PM |
479 | ret = nf_register_hooks(ipv6_conntrack_ops, |
480 | ARRAY_SIZE(ipv6_conntrack_ops)); | |
9fb9cbb1 | 481 | if (ret < 0) { |
654d0fbd | 482 | pr_err("nf_conntrack_ipv6: can't register pre-routing defrag " |
9fb9cbb1 | 483 | "hook.\n"); |
6330750d G |
484 | goto cleanup_pernet; |
485 | } | |
486 | ||
c296bb4d G |
487 | ret = nf_ct_l4proto_register(&nf_conntrack_l4proto_tcp6); |
488 | if (ret < 0) { | |
489 | pr_err("nf_conntrack_ipv6: can't register tcp6 proto.\n"); | |
490 | goto cleanup_hooks; | |
491 | } | |
492 | ||
493 | ret = nf_ct_l4proto_register(&nf_conntrack_l4proto_udp6); | |
494 | if (ret < 0) { | |
495 | pr_err("nf_conntrack_ipv6: can't register udp6 proto.\n"); | |
496 | goto cleanup_tcp6; | |
497 | } | |
498 | ||
499 | ret = nf_ct_l4proto_register(&nf_conntrack_l4proto_icmpv6); | |
500 | if (ret < 0) { | |
501 | pr_err("nf_conntrack_ipv6: can't register icmpv6 proto.\n"); | |
502 | goto cleanup_udp6; | |
503 | } | |
504 | ||
6330750d G |
505 | ret = nf_ct_l3proto_register(&nf_conntrack_l3proto_ipv6); |
506 | if (ret < 0) { | |
507 | pr_err("nf_conntrack_ipv6: can't register ipv6 proto.\n"); | |
c296bb4d | 508 | goto cleanup_icmpv6; |
9fb9cbb1 | 509 | } |
9fb9cbb1 YK |
510 | return ret; |
511 | ||
c296bb4d G |
512 | cleanup_icmpv6: |
513 | nf_ct_l4proto_unregister(&nf_conntrack_l4proto_icmpv6); | |
514 | cleanup_udp6: | |
515 | nf_ct_l4proto_unregister(&nf_conntrack_l4proto_udp6); | |
516 | cleanup_tcp6: | |
517 | nf_ct_l4proto_unregister(&nf_conntrack_l4proto_tcp6); | |
6330750d G |
518 | cleanup_hooks: |
519 | nf_unregister_hooks(ipv6_conntrack_ops, ARRAY_SIZE(ipv6_conntrack_ops)); | |
a7c439d3 | 520 | cleanup_pernet: |
6330750d G |
521 | unregister_pernet_subsys(&ipv6_net_ops); |
522 | cleanup_sockopt: | |
121d1e09 | 523 | nf_unregister_sockopt(&so_getorigdst6); |
9fb9cbb1 YK |
524 | return ret; |
525 | } | |
526 | ||
65b4b4e8 | 527 | static void __exit nf_conntrack_l3proto_ipv6_fini(void) |
9fb9cbb1 | 528 | { |
32292a7f | 529 | synchronize_net(); |
6330750d | 530 | nf_ct_l3proto_unregister(&nf_conntrack_l3proto_ipv6); |
c296bb4d G |
531 | nf_ct_l4proto_unregister(&nf_conntrack_l4proto_tcp6); |
532 | nf_ct_l4proto_unregister(&nf_conntrack_l4proto_udp6); | |
533 | nf_ct_l4proto_unregister(&nf_conntrack_l4proto_icmpv6); | |
32292a7f | 534 | nf_unregister_hooks(ipv6_conntrack_ops, ARRAY_SIZE(ipv6_conntrack_ops)); |
a7c439d3 | 535 | unregister_pernet_subsys(&ipv6_net_ops); |
121d1e09 | 536 | nf_unregister_sockopt(&so_getorigdst6); |
9fb9cbb1 YK |
537 | } |
538 | ||
65b4b4e8 AM |
539 | module_init(nf_conntrack_l3proto_ipv6_init); |
540 | module_exit(nf_conntrack_l3proto_ipv6_fini); |