Commit | Line | Data |
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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> | |
10 | * | |
11 | * 16 Dec 2003: Yasuyuki Kozakai @USAGI <yasuyuki.kozakai@toshiba.co.jp> | |
12 | * - support Layer 3 protocol independent connection tracking. | |
13 | * Based on the original ip_conntrack code which had the following | |
14 | * copyright information: | |
15 | * (C) 1999-2001 Paul `Rusty' Russell | |
16 | * (C) 2002-2004 Netfilter Core Team <coreteam@netfilter.org> | |
17 | * | |
18 | * 23 Mar 2004: Yasuyuki Kozakai @USAGI <yasuyuki.kozakai@toshiba.co.jp> | |
19 | * - add get_features() to support various size of conntrack | |
20 | * structures. | |
21 | */ | |
22 | ||
9fb9cbb1 YK |
23 | #include <linux/types.h> |
24 | #include <linux/ipv6.h> | |
25 | #include <linux/in6.h> | |
26 | #include <linux/netfilter.h> | |
27 | #include <linux/module.h> | |
28 | #include <linux/skbuff.h> | |
29 | #include <linux/icmp.h> | |
30 | #include <linux/sysctl.h> | |
31 | #include <net/ipv6.h> | |
32 | ||
33 | #include <linux/netfilter_ipv6.h> | |
34 | #include <net/netfilter/nf_conntrack.h> | |
35 | #include <net/netfilter/nf_conntrack_helper.h> | |
36 | #include <net/netfilter/nf_conntrack_protocol.h> | |
37 | #include <net/netfilter/nf_conntrack_l3proto.h> | |
38 | #include <net/netfilter/nf_conntrack_core.h> | |
39 | ||
40 | #if 0 | |
41 | #define DEBUGP printk | |
42 | #else | |
43 | #define DEBUGP(format, args...) | |
44 | #endif | |
45 | ||
46 | DECLARE_PER_CPU(struct ip_conntrack_stat, nf_conntrack_stat); | |
47 | ||
48 | static int ipv6_pkt_to_tuple(const struct sk_buff *skb, unsigned int nhoff, | |
49 | struct nf_conntrack_tuple *tuple) | |
50 | { | |
51 | u_int32_t _addrs[8], *ap; | |
52 | ||
53 | ap = skb_header_pointer(skb, nhoff + offsetof(struct ipv6hdr, saddr), | |
54 | sizeof(_addrs), _addrs); | |
55 | if (ap == NULL) | |
56 | return 0; | |
57 | ||
58 | memcpy(tuple->src.u3.ip6, ap, sizeof(tuple->src.u3.ip6)); | |
59 | memcpy(tuple->dst.u3.ip6, ap + 4, sizeof(tuple->dst.u3.ip6)); | |
60 | ||
61 | return 1; | |
62 | } | |
63 | ||
64 | static int ipv6_invert_tuple(struct nf_conntrack_tuple *tuple, | |
65 | const struct nf_conntrack_tuple *orig) | |
66 | { | |
67 | memcpy(tuple->src.u3.ip6, orig->dst.u3.ip6, sizeof(tuple->src.u3.ip6)); | |
68 | memcpy(tuple->dst.u3.ip6, orig->src.u3.ip6, sizeof(tuple->dst.u3.ip6)); | |
69 | ||
70 | return 1; | |
71 | } | |
72 | ||
73 | static int ipv6_print_tuple(struct seq_file *s, | |
74 | const struct nf_conntrack_tuple *tuple) | |
75 | { | |
46b86a2d | 76 | return seq_printf(s, "src=" NIP6_FMT " dst=" NIP6_FMT " ", |
9fb9cbb1 YK |
77 | NIP6(*((struct in6_addr *)tuple->src.u3.ip6)), |
78 | NIP6(*((struct in6_addr *)tuple->dst.u3.ip6))); | |
79 | } | |
80 | ||
81 | static int ipv6_print_conntrack(struct seq_file *s, | |
82 | const struct nf_conn *conntrack) | |
83 | { | |
84 | return 0; | |
85 | } | |
86 | ||
87 | /* | |
88 | * Based on ipv6_skip_exthdr() in net/ipv6/exthdr.c | |
89 | * | |
90 | * This function parses (probably truncated) exthdr set "hdr" | |
91 | * of length "len". "nexthdrp" initially points to some place, | |
92 | * where type of the first header can be found. | |
93 | * | |
94 | * It skips all well-known exthdrs, and returns pointer to the start | |
95 | * of unparsable area i.e. the first header with unknown type. | |
96 | * if success, *nexthdr is updated by type/protocol of this header. | |
97 | * | |
98 | * NOTES: - it may return pointer pointing beyond end of packet, | |
99 | * if the last recognized header is truncated in the middle. | |
100 | * - if packet is truncated, so that all parsed headers are skipped, | |
101 | * it returns -1. | |
102 | * - if packet is fragmented, return pointer of the fragment header. | |
103 | * - ESP is unparsable for now and considered like | |
104 | * normal payload protocol. | |
105 | * - Note also special handling of AUTH header. Thanks to IPsec wizards. | |
106 | */ | |
107 | ||
108 | int nf_ct_ipv6_skip_exthdr(struct sk_buff *skb, int start, u8 *nexthdrp, | |
109 | int len) | |
110 | { | |
111 | u8 nexthdr = *nexthdrp; | |
112 | ||
113 | while (ipv6_ext_hdr(nexthdr)) { | |
114 | struct ipv6_opt_hdr hdr; | |
115 | int hdrlen; | |
116 | ||
117 | if (len < (int)sizeof(struct ipv6_opt_hdr)) | |
118 | return -1; | |
119 | if (nexthdr == NEXTHDR_NONE) | |
120 | break; | |
121 | if (nexthdr == NEXTHDR_FRAGMENT) | |
122 | break; | |
123 | if (skb_copy_bits(skb, start, &hdr, sizeof(hdr))) | |
124 | BUG(); | |
125 | if (nexthdr == NEXTHDR_AUTH) | |
126 | hdrlen = (hdr.hdrlen+2)<<2; | |
127 | else | |
128 | hdrlen = ipv6_optlen(&hdr); | |
129 | ||
130 | nexthdr = hdr.nexthdr; | |
131 | len -= hdrlen; | |
132 | start += hdrlen; | |
133 | } | |
134 | ||
135 | *nexthdrp = nexthdr; | |
136 | return start; | |
137 | } | |
138 | ||
139 | static int | |
140 | ipv6_prepare(struct sk_buff **pskb, unsigned int hooknum, unsigned int *dataoff, | |
141 | u_int8_t *protonum) | |
142 | { | |
143 | unsigned int extoff; | |
144 | unsigned char pnum; | |
145 | int protoff; | |
146 | ||
147 | extoff = (u8*)((*pskb)->nh.ipv6h + 1) - (*pskb)->data; | |
148 | pnum = (*pskb)->nh.ipv6h->nexthdr; | |
149 | ||
150 | protoff = nf_ct_ipv6_skip_exthdr(*pskb, extoff, &pnum, | |
151 | (*pskb)->len - extoff); | |
152 | ||
153 | /* | |
154 | * (protoff == (*pskb)->len) mean that the packet doesn't have no data | |
155 | * except of IPv6 & ext headers. but it's tracked anyway. - YK | |
156 | */ | |
157 | if ((protoff < 0) || (protoff > (*pskb)->len)) { | |
158 | DEBUGP("ip6_conntrack_core: can't find proto in pkt\n"); | |
159 | NF_CT_STAT_INC(error); | |
160 | NF_CT_STAT_INC(invalid); | |
161 | return -NF_ACCEPT; | |
162 | } | |
163 | ||
164 | *dataoff = protoff; | |
165 | *protonum = pnum; | |
166 | return NF_ACCEPT; | |
167 | } | |
168 | ||
169 | static u_int32_t ipv6_get_features(const struct nf_conntrack_tuple *tuple) | |
170 | { | |
171 | return NF_CT_F_BASIC; | |
172 | } | |
173 | ||
174 | static unsigned int ipv6_confirm(unsigned int hooknum, | |
175 | struct sk_buff **pskb, | |
176 | const struct net_device *in, | |
177 | const struct net_device *out, | |
178 | int (*okfn)(struct sk_buff *)) | |
179 | { | |
180 | struct nf_conn *ct; | |
dc808fe2 | 181 | struct nf_conn_help *help; |
9fb9cbb1 | 182 | enum ip_conntrack_info ctinfo; |
dc808fe2 HW |
183 | unsigned int ret, protoff; |
184 | unsigned int extoff = (u8*)((*pskb)->nh.ipv6h + 1) | |
185 | - (*pskb)->data; | |
186 | unsigned char pnum = (*pskb)->nh.ipv6h->nexthdr; | |
187 | ||
9fb9cbb1 YK |
188 | |
189 | /* This is where we call the helper: as the packet goes out. */ | |
190 | ct = nf_ct_get(*pskb, &ctinfo); | |
6442f1cf | 191 | if (!ct || ctinfo == IP_CT_RELATED + IP_CT_IS_REPLY) |
dc808fe2 HW |
192 | goto out; |
193 | ||
194 | help = nfct_help(ct); | |
195 | if (!help || !help->helper) | |
196 | goto out; | |
197 | ||
198 | protoff = nf_ct_ipv6_skip_exthdr(*pskb, extoff, &pnum, | |
199 | (*pskb)->len - extoff); | |
200 | if (protoff < 0 || protoff > (*pskb)->len || | |
201 | pnum == NEXTHDR_FRAGMENT) { | |
202 | DEBUGP("proto header not found\n"); | |
203 | return NF_ACCEPT; | |
9fb9cbb1 YK |
204 | } |
205 | ||
dc808fe2 HW |
206 | ret = help->helper->help(pskb, protoff, ct, ctinfo); |
207 | if (ret != NF_ACCEPT) | |
208 | return ret; | |
209 | out: | |
9fb9cbb1 | 210 | /* We've seen it coming out the other side: confirm it */ |
9fb9cbb1 YK |
211 | return nf_conntrack_confirm(pskb); |
212 | } | |
213 | ||
214 | extern struct sk_buff *nf_ct_frag6_gather(struct sk_buff *skb); | |
215 | extern void nf_ct_frag6_output(unsigned int hooknum, struct sk_buff *skb, | |
216 | struct net_device *in, | |
217 | struct net_device *out, | |
218 | int (*okfn)(struct sk_buff *)); | |
219 | static unsigned int ipv6_defrag(unsigned int hooknum, | |
220 | struct sk_buff **pskb, | |
221 | const struct net_device *in, | |
222 | const struct net_device *out, | |
223 | int (*okfn)(struct sk_buff *)) | |
224 | { | |
225 | struct sk_buff *reasm; | |
226 | ||
227 | /* Previously seen (loopback)? */ | |
228 | if ((*pskb)->nfct) | |
229 | return NF_ACCEPT; | |
230 | ||
231 | reasm = nf_ct_frag6_gather(*pskb); | |
232 | ||
233 | /* queued */ | |
234 | if (reasm == NULL) | |
235 | return NF_STOLEN; | |
236 | ||
237 | /* error occured or not fragmented */ | |
238 | if (reasm == *pskb) | |
239 | return NF_ACCEPT; | |
240 | ||
241 | nf_ct_frag6_output(hooknum, reasm, (struct net_device *)in, | |
242 | (struct net_device *)out, okfn); | |
243 | ||
244 | return NF_STOLEN; | |
245 | } | |
246 | ||
247 | static unsigned int ipv6_conntrack_in(unsigned int hooknum, | |
248 | struct sk_buff **pskb, | |
249 | const struct net_device *in, | |
250 | const struct net_device *out, | |
251 | int (*okfn)(struct sk_buff *)) | |
252 | { | |
253 | struct sk_buff *reasm = (*pskb)->nfct_reasm; | |
254 | ||
255 | /* This packet is fragmented and has reassembled packet. */ | |
256 | if (reasm) { | |
257 | /* Reassembled packet isn't parsed yet ? */ | |
258 | if (!reasm->nfct) { | |
259 | unsigned int ret; | |
260 | ||
261 | ret = nf_conntrack_in(PF_INET6, hooknum, &reasm); | |
262 | if (ret != NF_ACCEPT) | |
263 | return ret; | |
264 | } | |
265 | nf_conntrack_get(reasm->nfct); | |
266 | (*pskb)->nfct = reasm->nfct; | |
267 | return NF_ACCEPT; | |
268 | } | |
269 | ||
270 | return nf_conntrack_in(PF_INET6, hooknum, pskb); | |
271 | } | |
272 | ||
273 | static unsigned int ipv6_conntrack_local(unsigned int hooknum, | |
274 | struct sk_buff **pskb, | |
275 | const struct net_device *in, | |
276 | const struct net_device *out, | |
277 | int (*okfn)(struct sk_buff *)) | |
278 | { | |
279 | /* root is playing with raw sockets. */ | |
280 | if ((*pskb)->len < sizeof(struct ipv6hdr)) { | |
281 | if (net_ratelimit()) | |
282 | printk("ipv6_conntrack_local: packet too short\n"); | |
283 | return NF_ACCEPT; | |
284 | } | |
285 | return ipv6_conntrack_in(hooknum, pskb, in, out, okfn); | |
286 | } | |
287 | ||
964ddaa1 PM |
288 | static struct nf_hook_ops ipv6_conntrack_ops[] = { |
289 | { | |
290 | .hook = ipv6_defrag, | |
291 | .owner = THIS_MODULE, | |
292 | .pf = PF_INET6, | |
293 | .hooknum = NF_IP6_PRE_ROUTING, | |
294 | .priority = NF_IP6_PRI_CONNTRACK_DEFRAG, | |
295 | }, | |
296 | { | |
297 | .hook = ipv6_conntrack_in, | |
298 | .owner = THIS_MODULE, | |
299 | .pf = PF_INET6, | |
300 | .hooknum = NF_IP6_PRE_ROUTING, | |
301 | .priority = NF_IP6_PRI_CONNTRACK, | |
302 | }, | |
303 | { | |
304 | .hook = ipv6_conntrack_local, | |
305 | .owner = THIS_MODULE, | |
306 | .pf = PF_INET6, | |
307 | .hooknum = NF_IP6_LOCAL_OUT, | |
308 | .priority = NF_IP6_PRI_CONNTRACK, | |
309 | }, | |
310 | { | |
311 | .hook = ipv6_defrag, | |
312 | .owner = THIS_MODULE, | |
313 | .pf = PF_INET6, | |
314 | .hooknum = NF_IP6_LOCAL_OUT, | |
315 | .priority = NF_IP6_PRI_CONNTRACK_DEFRAG, | |
316 | }, | |
317 | { | |
318 | .hook = ipv6_confirm, | |
319 | .owner = THIS_MODULE, | |
320 | .pf = PF_INET6, | |
321 | .hooknum = NF_IP6_POST_ROUTING, | |
322 | .priority = NF_IP6_PRI_LAST, | |
323 | }, | |
324 | { | |
325 | .hook = ipv6_confirm, | |
326 | .owner = THIS_MODULE, | |
327 | .pf = PF_INET6, | |
328 | .hooknum = NF_IP6_LOCAL_IN, | |
329 | .priority = NF_IP6_PRI_LAST-1, | |
330 | }, | |
9fb9cbb1 YK |
331 | }; |
332 | ||
333 | #ifdef CONFIG_SYSCTL | |
334 | ||
335 | /* From nf_conntrack_proto_icmpv6.c */ | |
babbdb1a | 336 | extern unsigned int nf_ct_icmpv6_timeout; |
9fb9cbb1 | 337 | |
94aec08e | 338 | /* From nf_conntrack_reasm.c */ |
babbdb1a | 339 | extern unsigned int nf_ct_frag6_timeout; |
7686a02c YK |
340 | extern unsigned int nf_ct_frag6_low_thresh; |
341 | extern unsigned int nf_ct_frag6_high_thresh; | |
9fb9cbb1 YK |
342 | |
343 | static struct ctl_table_header *nf_ct_ipv6_sysctl_header; | |
344 | ||
345 | static ctl_table nf_ct_sysctl_table[] = { | |
346 | { | |
347 | .ctl_name = NET_NF_CONNTRACK_ICMPV6_TIMEOUT, | |
348 | .procname = "nf_conntrack_icmpv6_timeout", | |
349 | .data = &nf_ct_icmpv6_timeout, | |
350 | .maxlen = sizeof(unsigned int), | |
351 | .mode = 0644, | |
352 | .proc_handler = &proc_dointvec_jiffies, | |
353 | }, | |
354 | { | |
355 | .ctl_name = NET_NF_CONNTRACK_FRAG6_TIMEOUT, | |
356 | .procname = "nf_conntrack_frag6_timeout", | |
357 | .data = &nf_ct_frag6_timeout, | |
358 | .maxlen = sizeof(unsigned int), | |
359 | .mode = 0644, | |
360 | .proc_handler = &proc_dointvec_jiffies, | |
361 | }, | |
362 | { | |
363 | .ctl_name = NET_NF_CONNTRACK_FRAG6_LOW_THRESH, | |
364 | .procname = "nf_conntrack_frag6_low_thresh", | |
365 | .data = &nf_ct_frag6_low_thresh, | |
366 | .maxlen = sizeof(unsigned int), | |
367 | .mode = 0644, | |
7686a02c | 368 | .proc_handler = &proc_dointvec, |
9fb9cbb1 YK |
369 | }, |
370 | { | |
371 | .ctl_name = NET_NF_CONNTRACK_FRAG6_HIGH_THRESH, | |
372 | .procname = "nf_conntrack_frag6_high_thresh", | |
373 | .data = &nf_ct_frag6_high_thresh, | |
374 | .maxlen = sizeof(unsigned int), | |
375 | .mode = 0644, | |
7686a02c | 376 | .proc_handler = &proc_dointvec, |
9fb9cbb1 YK |
377 | }, |
378 | { .ctl_name = 0 } | |
379 | }; | |
380 | ||
381 | static ctl_table nf_ct_netfilter_table[] = { | |
382 | { | |
383 | .ctl_name = NET_NETFILTER, | |
384 | .procname = "netfilter", | |
385 | .mode = 0555, | |
386 | .child = nf_ct_sysctl_table, | |
387 | }, | |
388 | { .ctl_name = 0 } | |
389 | }; | |
390 | ||
391 | static ctl_table nf_ct_net_table[] = { | |
392 | { | |
393 | .ctl_name = CTL_NET, | |
394 | .procname = "net", | |
395 | .mode = 0555, | |
396 | .child = nf_ct_netfilter_table, | |
397 | }, | |
398 | { .ctl_name = 0 } | |
399 | }; | |
400 | #endif | |
401 | ||
c1d10adb PNA |
402 | #if defined(CONFIG_NF_CT_NETLINK) || \ |
403 | defined(CONFIG_NF_CT_NETLINK_MODULE) | |
404 | ||
405 | #include <linux/netfilter/nfnetlink.h> | |
406 | #include <linux/netfilter/nfnetlink_conntrack.h> | |
407 | ||
408 | static int ipv6_tuple_to_nfattr(struct sk_buff *skb, | |
409 | const struct nf_conntrack_tuple *tuple) | |
410 | { | |
411 | NFA_PUT(skb, CTA_IP_V6_SRC, sizeof(u_int32_t) * 4, | |
412 | &tuple->src.u3.ip6); | |
413 | NFA_PUT(skb, CTA_IP_V6_DST, sizeof(u_int32_t) * 4, | |
414 | &tuple->dst.u3.ip6); | |
415 | return 0; | |
416 | ||
417 | nfattr_failure: | |
418 | return -1; | |
419 | } | |
420 | ||
421 | static const size_t cta_min_ip[CTA_IP_MAX] = { | |
422 | [CTA_IP_V6_SRC-1] = sizeof(u_int32_t)*4, | |
423 | [CTA_IP_V6_DST-1] = sizeof(u_int32_t)*4, | |
424 | }; | |
425 | ||
426 | static int ipv6_nfattr_to_tuple(struct nfattr *tb[], | |
427 | struct nf_conntrack_tuple *t) | |
428 | { | |
429 | if (!tb[CTA_IP_V6_SRC-1] || !tb[CTA_IP_V6_DST-1]) | |
430 | return -EINVAL; | |
431 | ||
432 | if (nfattr_bad_size(tb, CTA_IP_MAX, cta_min_ip)) | |
433 | return -EINVAL; | |
434 | ||
435 | memcpy(&t->src.u3.ip6, NFA_DATA(tb[CTA_IP_V6_SRC-1]), | |
436 | sizeof(u_int32_t) * 4); | |
437 | memcpy(&t->dst.u3.ip6, NFA_DATA(tb[CTA_IP_V6_DST-1]), | |
438 | sizeof(u_int32_t) * 4); | |
439 | ||
440 | return 0; | |
441 | } | |
442 | #endif | |
443 | ||
9fb9cbb1 YK |
444 | struct nf_conntrack_l3proto nf_conntrack_l3proto_ipv6 = { |
445 | .l3proto = PF_INET6, | |
446 | .name = "ipv6", | |
447 | .pkt_to_tuple = ipv6_pkt_to_tuple, | |
448 | .invert_tuple = ipv6_invert_tuple, | |
449 | .print_tuple = ipv6_print_tuple, | |
450 | .print_conntrack = ipv6_print_conntrack, | |
451 | .prepare = ipv6_prepare, | |
c1d10adb PNA |
452 | #if defined(CONFIG_NF_CT_NETLINK) || \ |
453 | defined(CONFIG_NF_CT_NETLINK_MODULE) | |
454 | .tuple_to_nfattr = ipv6_tuple_to_nfattr, | |
455 | .nfattr_to_tuple = ipv6_nfattr_to_tuple, | |
456 | #endif | |
9fb9cbb1 YK |
457 | .get_features = ipv6_get_features, |
458 | .me = THIS_MODULE, | |
459 | }; | |
460 | ||
461 | extern struct nf_conntrack_protocol nf_conntrack_protocol_tcp6; | |
462 | extern struct nf_conntrack_protocol nf_conntrack_protocol_udp6; | |
463 | extern struct nf_conntrack_protocol nf_conntrack_protocol_icmpv6; | |
464 | extern int nf_ct_frag6_init(void); | |
465 | extern void nf_ct_frag6_cleanup(void); | |
32292a7f PM |
466 | |
467 | MODULE_ALIAS("nf_conntrack-" __stringify(AF_INET6)); | |
468 | MODULE_LICENSE("GPL"); | |
469 | MODULE_AUTHOR("Yasuyuki KOZAKAI @USAGI <yasuyuki.kozakai@toshiba.co.jp>"); | |
470 | ||
471 | static int __init nf_conntrack_l3proto_ipv6_init(void) | |
9fb9cbb1 YK |
472 | { |
473 | int ret = 0; | |
474 | ||
32292a7f | 475 | need_conntrack(); |
9fb9cbb1 YK |
476 | |
477 | ret = nf_ct_frag6_init(); | |
478 | if (ret < 0) { | |
479 | printk("nf_conntrack_ipv6: can't initialize frag6.\n"); | |
32292a7f | 480 | return ret; |
9fb9cbb1 YK |
481 | } |
482 | ret = nf_conntrack_protocol_register(&nf_conntrack_protocol_tcp6); | |
483 | if (ret < 0) { | |
484 | printk("nf_conntrack_ipv6: can't register tcp.\n"); | |
485 | goto cleanup_frag6; | |
486 | } | |
487 | ||
488 | ret = nf_conntrack_protocol_register(&nf_conntrack_protocol_udp6); | |
489 | if (ret < 0) { | |
490 | printk("nf_conntrack_ipv6: can't register udp.\n"); | |
491 | goto cleanup_tcp; | |
492 | } | |
493 | ||
494 | ret = nf_conntrack_protocol_register(&nf_conntrack_protocol_icmpv6); | |
495 | if (ret < 0) { | |
496 | printk("nf_conntrack_ipv6: can't register icmpv6.\n"); | |
497 | goto cleanup_udp; | |
498 | } | |
499 | ||
500 | ret = nf_conntrack_l3proto_register(&nf_conntrack_l3proto_ipv6); | |
501 | if (ret < 0) { | |
502 | printk("nf_conntrack_ipv6: can't register ipv6\n"); | |
503 | goto cleanup_icmpv6; | |
504 | } | |
505 | ||
964ddaa1 PM |
506 | ret = nf_register_hooks(ipv6_conntrack_ops, |
507 | ARRAY_SIZE(ipv6_conntrack_ops)); | |
9fb9cbb1 YK |
508 | if (ret < 0) { |
509 | printk("nf_conntrack_ipv6: can't register pre-routing defrag " | |
510 | "hook.\n"); | |
511 | goto cleanup_ipv6; | |
512 | } | |
9fb9cbb1 YK |
513 | #ifdef CONFIG_SYSCTL |
514 | nf_ct_ipv6_sysctl_header = register_sysctl_table(nf_ct_net_table, 0); | |
515 | if (nf_ct_ipv6_sysctl_header == NULL) { | |
516 | printk("nf_conntrack: can't register to sysctl.\n"); | |
517 | ret = -ENOMEM; | |
964ddaa1 | 518 | goto cleanup_hooks; |
9fb9cbb1 YK |
519 | } |
520 | #endif | |
521 | return ret; | |
522 | ||
9fb9cbb1 | 523 | #ifdef CONFIG_SYSCTL |
964ddaa1 | 524 | cleanup_hooks: |
964ddaa1 | 525 | nf_unregister_hooks(ipv6_conntrack_ops, ARRAY_SIZE(ipv6_conntrack_ops)); |
32292a7f | 526 | #endif |
9fb9cbb1 YK |
527 | cleanup_ipv6: |
528 | nf_conntrack_l3proto_unregister(&nf_conntrack_l3proto_ipv6); | |
529 | cleanup_icmpv6: | |
530 | nf_conntrack_protocol_unregister(&nf_conntrack_protocol_icmpv6); | |
531 | cleanup_udp: | |
532 | nf_conntrack_protocol_unregister(&nf_conntrack_protocol_udp6); | |
533 | cleanup_tcp: | |
534 | nf_conntrack_protocol_unregister(&nf_conntrack_protocol_tcp6); | |
535 | cleanup_frag6: | |
536 | nf_ct_frag6_cleanup(); | |
9fb9cbb1 YK |
537 | return ret; |
538 | } | |
539 | ||
65b4b4e8 | 540 | static void __exit nf_conntrack_l3proto_ipv6_fini(void) |
9fb9cbb1 | 541 | { |
32292a7f PM |
542 | synchronize_net(); |
543 | #ifdef CONFIG_SYSCTL | |
544 | unregister_sysctl_table(nf_ct_ipv6_sysctl_header); | |
545 | #endif | |
546 | nf_unregister_hooks(ipv6_conntrack_ops, ARRAY_SIZE(ipv6_conntrack_ops)); | |
547 | nf_conntrack_l3proto_unregister(&nf_conntrack_l3proto_ipv6); | |
548 | nf_conntrack_protocol_unregister(&nf_conntrack_protocol_icmpv6); | |
549 | nf_conntrack_protocol_unregister(&nf_conntrack_protocol_udp6); | |
550 | nf_conntrack_protocol_unregister(&nf_conntrack_protocol_tcp6); | |
551 | nf_ct_frag6_cleanup(); | |
9fb9cbb1 YK |
552 | } |
553 | ||
65b4b4e8 AM |
554 | module_init(nf_conntrack_l3proto_ipv6_init); |
555 | module_exit(nf_conntrack_l3proto_ipv6_fini); |