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Commit | Line | Data |
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2c8d7ca0 NT |
1 | /* |
2 | * Copyright (C)2003-2006 Helsinki University of Technology | |
3 | * Copyright (C)2003-2006 USAGI/WIDE Project | |
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 as published by | |
7 | * the Free Software Foundation; either version 2 of the License, or | |
8 | * (at your option) any later version. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, | |
11 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
13 | * GNU General Public License for more details. | |
14 | * | |
15 | * You should have received a copy of the GNU General Public License | |
16 | * along with this program; if not, write to the Free Software | |
17 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
18 | */ | |
19 | /* | |
20 | * Authors: | |
21 | * Noriaki TAKAMIYA @USAGI | |
22 | * Masahide NAKAMURA @USAGI | |
23 | */ | |
24 | ||
2c8d7ca0 NT |
25 | #include <linux/module.h> |
26 | #include <linux/skbuff.h> | |
70182ed2 | 27 | #include <linux/time.h> |
2c8d7ca0 | 28 | #include <linux/ipv6.h> |
7be96f76 MN |
29 | #include <linux/icmpv6.h> |
30 | #include <net/sock.h> | |
2c8d7ca0 | 31 | #include <net/ipv6.h> |
7be96f76 | 32 | #include <net/ip6_checksum.h> |
59fbb3a6 | 33 | #include <net/rawv6.h> |
2c8d7ca0 NT |
34 | #include <net/xfrm.h> |
35 | #include <net/mip6.h> | |
36 | ||
37 | static xfrm_address_t *mip6_xfrm_addr(struct xfrm_state *x, xfrm_address_t *addr) | |
38 | { | |
39 | return x->coaddr; | |
40 | } | |
41 | ||
3d126890 NT |
42 | static inline unsigned int calc_padlen(unsigned int len, unsigned int n) |
43 | { | |
44 | return (n - len + 16) & 0x7; | |
45 | } | |
46 | ||
47 | static inline void *mip6_padn(__u8 *data, __u8 padlen) | |
48 | { | |
49 | if (!data) | |
50 | return NULL; | |
51 | if (padlen == 1) { | |
52 | data[0] = MIP6_OPT_PAD_1; | |
53 | } else if (padlen > 1) { | |
54 | data[0] = MIP6_OPT_PAD_N; | |
55 | data[1] = padlen - 2; | |
56 | if (padlen > 2) | |
57 | memset(data+2, 0, data[1]); | |
58 | } | |
59 | return data + padlen; | |
60 | } | |
61 | ||
7be96f76 MN |
62 | static inline void mip6_param_prob(struct sk_buff *skb, int code, int pos) |
63 | { | |
64 | icmpv6_send(skb, ICMPV6_PARAMPROB, code, pos, skb->dev); | |
65 | } | |
66 | ||
67 | static int mip6_mh_len(int type) | |
68 | { | |
69 | int len = 0; | |
70 | ||
71 | switch (type) { | |
72 | case IP6_MH_TYPE_BRR: | |
73 | len = 0; | |
74 | break; | |
75 | case IP6_MH_TYPE_HOTI: | |
76 | case IP6_MH_TYPE_COTI: | |
77 | case IP6_MH_TYPE_BU: | |
78 | case IP6_MH_TYPE_BACK: | |
79 | len = 1; | |
80 | break; | |
81 | case IP6_MH_TYPE_HOT: | |
82 | case IP6_MH_TYPE_COT: | |
83 | case IP6_MH_TYPE_BERROR: | |
84 | len = 2; | |
85 | break; | |
86 | } | |
87 | return len; | |
88 | } | |
89 | ||
59fbb3a6 | 90 | static int mip6_mh_filter(struct sock *sk, struct sk_buff *skb) |
7be96f76 MN |
91 | { |
92 | struct ip6_mh *mh; | |
7be96f76 | 93 | |
ea2ae17d ACM |
94 | if (!pskb_may_pull(skb, (skb_transport_offset(skb)) + 8) || |
95 | !pskb_may_pull(skb, (skb_transport_offset(skb) + | |
9c70220b | 96 | ((skb_transport_header(skb)[1] + 1) << 3)))) |
7be96f76 MN |
97 | return -1; |
98 | ||
9c70220b | 99 | mh = (struct ip6_mh *)skb_transport_header(skb); |
7be96f76 MN |
100 | |
101 | if (mh->ip6mh_hdrlen < mip6_mh_len(mh->ip6mh_type)) { | |
102 | LIMIT_NETDEBUG(KERN_DEBUG "mip6: MH message too short: %d vs >=%d\n", | |
103 | mh->ip6mh_hdrlen, mip6_mh_len(mh->ip6mh_type)); | |
d56f90a7 ACM |
104 | mip6_param_prob(skb, 0, ((&mh->ip6mh_hdrlen) - |
105 | skb_network_header(skb))); | |
7be96f76 MN |
106 | return -1; |
107 | } | |
7be96f76 MN |
108 | |
109 | if (mh->ip6mh_proto != IPPROTO_NONE) { | |
110 | LIMIT_NETDEBUG(KERN_DEBUG "mip6: MH invalid payload proto = %d\n", | |
111 | mh->ip6mh_proto); | |
d56f90a7 ACM |
112 | mip6_param_prob(skb, 0, ((&mh->ip6mh_proto) - |
113 | skb_network_header(skb))); | |
7be96f76 MN |
114 | return -1; |
115 | } | |
116 | ||
117 | return 0; | |
118 | } | |
119 | ||
70182ed2 MN |
120 | struct mip6_report_rate_limiter { |
121 | spinlock_t lock; | |
122 | struct timeval stamp; | |
123 | int iif; | |
124 | struct in6_addr src; | |
125 | struct in6_addr dst; | |
126 | }; | |
127 | ||
128 | static struct mip6_report_rate_limiter mip6_report_rl = { | |
4ef8d0ae | 129 | .lock = __SPIN_LOCK_UNLOCKED(mip6_report_rl.lock) |
70182ed2 MN |
130 | }; |
131 | ||
3d126890 NT |
132 | static int mip6_destopt_input(struct xfrm_state *x, struct sk_buff *skb) |
133 | { | |
0660e03f | 134 | struct ipv6hdr *iph = ipv6_hdr(skb); |
3d126890 NT |
135 | struct ipv6_destopt_hdr *destopt = (struct ipv6_destopt_hdr *)skb->data; |
136 | ||
137 | if (!ipv6_addr_equal(&iph->saddr, (struct in6_addr *)x->coaddr) && | |
138 | !ipv6_addr_any((struct in6_addr *)x->coaddr)) | |
139 | return -ENOENT; | |
140 | ||
141 | return destopt->nexthdr; | |
142 | } | |
143 | ||
144 | /* Destination Option Header is inserted. | |
145 | * IP Header's src address is replaced with Home Address Option in | |
146 | * Destination Option Header. | |
147 | */ | |
148 | static int mip6_destopt_output(struct xfrm_state *x, struct sk_buff *skb) | |
149 | { | |
150 | struct ipv6hdr *iph; | |
151 | struct ipv6_destopt_hdr *dstopt; | |
152 | struct ipv6_destopt_hao *hao; | |
153 | u8 nexthdr; | |
154 | int len; | |
155 | ||
7b277b1a | 156 | skb_push(skb, -skb_network_offset(skb)); |
007f0211 | 157 | iph = ipv6_hdr(skb); |
3d126890 | 158 | |
007f0211 HX |
159 | nexthdr = *skb_mac_header(skb); |
160 | *skb_mac_header(skb) = IPPROTO_DSTOPTS; | |
3d126890 | 161 | |
9c70220b | 162 | dstopt = (struct ipv6_destopt_hdr *)skb_transport_header(skb); |
3d126890 NT |
163 | dstopt->nexthdr = nexthdr; |
164 | ||
165 | hao = mip6_padn((char *)(dstopt + 1), | |
166 | calc_padlen(sizeof(*dstopt), 6)); | |
167 | ||
168 | hao->type = IPV6_TLV_HAO; | |
169 | hao->length = sizeof(*hao) - 2; | |
170 | BUG_TRAP(hao->length == 16); | |
171 | ||
172 | len = ((char *)hao - (char *)dstopt) + sizeof(*hao); | |
173 | ||
174 | memcpy(&hao->addr, &iph->saddr, sizeof(hao->addr)); | |
b7c6538c | 175 | spin_lock_bh(&x->lock); |
3d126890 | 176 | memcpy(&iph->saddr, x->coaddr, sizeof(iph->saddr)); |
b7c6538c | 177 | spin_unlock_bh(&x->lock); |
3d126890 NT |
178 | |
179 | BUG_TRAP(len == x->props.header_len); | |
180 | dstopt->hdrlen = (x->props.header_len >> 3) - 1; | |
181 | ||
182 | return 0; | |
183 | } | |
184 | ||
70182ed2 MN |
185 | static inline int mip6_report_rl_allow(struct timeval *stamp, |
186 | struct in6_addr *dst, | |
187 | struct in6_addr *src, int iif) | |
188 | { | |
189 | int allow = 0; | |
190 | ||
191 | spin_lock_bh(&mip6_report_rl.lock); | |
192 | if (mip6_report_rl.stamp.tv_sec != stamp->tv_sec || | |
193 | mip6_report_rl.stamp.tv_usec != stamp->tv_usec || | |
194 | mip6_report_rl.iif != iif || | |
195 | !ipv6_addr_equal(&mip6_report_rl.src, src) || | |
196 | !ipv6_addr_equal(&mip6_report_rl.dst, dst)) { | |
197 | mip6_report_rl.stamp.tv_sec = stamp->tv_sec; | |
198 | mip6_report_rl.stamp.tv_usec = stamp->tv_usec; | |
199 | mip6_report_rl.iif = iif; | |
200 | ipv6_addr_copy(&mip6_report_rl.src, src); | |
201 | ipv6_addr_copy(&mip6_report_rl.dst, dst); | |
202 | allow = 1; | |
203 | } | |
204 | spin_unlock_bh(&mip6_report_rl.lock); | |
205 | return allow; | |
206 | } | |
207 | ||
208 | static int mip6_destopt_reject(struct xfrm_state *x, struct sk_buff *skb, struct flowi *fl) | |
209 | { | |
210 | struct inet6_skb_parm *opt = (struct inet6_skb_parm *)skb->cb; | |
211 | struct ipv6_destopt_hao *hao = NULL; | |
212 | struct xfrm_selector sel; | |
213 | int offset; | |
214 | struct timeval stamp; | |
215 | int err = 0; | |
216 | ||
e731c248 YH |
217 | if (unlikely(fl->proto == IPPROTO_MH && |
218 | fl->fl_mh_type <= IP6_MH_TYPE_MAX)) | |
01be8e5d MN |
219 | goto out; |
220 | ||
70182ed2 MN |
221 | if (likely(opt->dsthao)) { |
222 | offset = ipv6_find_tlv(skb, opt->dsthao, IPV6_TLV_HAO); | |
223 | if (likely(offset >= 0)) | |
d56f90a7 ACM |
224 | hao = (struct ipv6_destopt_hao *) |
225 | (skb_network_header(skb) + offset); | |
70182ed2 MN |
226 | } |
227 | ||
228 | skb_get_timestamp(skb, &stamp); | |
229 | ||
0660e03f ACM |
230 | if (!mip6_report_rl_allow(&stamp, &ipv6_hdr(skb)->daddr, |
231 | hao ? &hao->addr : &ipv6_hdr(skb)->saddr, | |
70182ed2 MN |
232 | opt->iif)) |
233 | goto out; | |
234 | ||
235 | memset(&sel, 0, sizeof(sel)); | |
0660e03f | 236 | memcpy(&sel.daddr, (xfrm_address_t *)&ipv6_hdr(skb)->daddr, |
70182ed2 MN |
237 | sizeof(sel.daddr)); |
238 | sel.prefixlen_d = 128; | |
0660e03f | 239 | memcpy(&sel.saddr, (xfrm_address_t *)&ipv6_hdr(skb)->saddr, |
70182ed2 MN |
240 | sizeof(sel.saddr)); |
241 | sel.prefixlen_s = 128; | |
242 | sel.family = AF_INET6; | |
243 | sel.proto = fl->proto; | |
244 | sel.dport = xfrm_flowi_dport(fl); | |
245 | if (sel.dport) | |
e69a4adc | 246 | sel.dport_mask = htons(~0); |
70182ed2 MN |
247 | sel.sport = xfrm_flowi_sport(fl); |
248 | if (sel.sport) | |
e69a4adc | 249 | sel.sport_mask = htons(~0); |
70182ed2 MN |
250 | sel.ifindex = fl->oif; |
251 | ||
252 | err = km_report(IPPROTO_DSTOPTS, &sel, | |
253 | (hao ? (xfrm_address_t *)&hao->addr : NULL)); | |
254 | ||
255 | out: | |
256 | return err; | |
257 | } | |
258 | ||
3d126890 NT |
259 | static int mip6_destopt_offset(struct xfrm_state *x, struct sk_buff *skb, |
260 | u8 **nexthdr) | |
261 | { | |
262 | u16 offset = sizeof(struct ipv6hdr); | |
0660e03f ACM |
263 | struct ipv6_opt_hdr *exthdr = |
264 | (struct ipv6_opt_hdr *)(ipv6_hdr(skb) + 1); | |
d56f90a7 | 265 | const unsigned char *nh = skb_network_header(skb); |
27a884dc | 266 | unsigned int packet_len = skb->tail - skb->network_header; |
3d126890 NT |
267 | int found_rhdr = 0; |
268 | ||
0660e03f | 269 | *nexthdr = &ipv6_hdr(skb)->nexthdr; |
3d126890 NT |
270 | |
271 | while (offset + 1 <= packet_len) { | |
272 | ||
273 | switch (**nexthdr) { | |
274 | case NEXTHDR_HOP: | |
275 | break; | |
276 | case NEXTHDR_ROUTING: | |
277 | found_rhdr = 1; | |
278 | break; | |
279 | case NEXTHDR_DEST: | |
280 | /* | |
281 | * HAO MUST NOT appear more than once. | |
282 | * XXX: It is better to try to find by the end of | |
283 | * XXX: packet if HAO exists. | |
284 | */ | |
285 | if (ipv6_find_tlv(skb, offset, IPV6_TLV_HAO) >= 0) { | |
286 | LIMIT_NETDEBUG(KERN_WARNING "mip6: hao exists already, override\n"); | |
287 | return offset; | |
288 | } | |
289 | ||
290 | if (found_rhdr) | |
291 | return offset; | |
292 | ||
293 | break; | |
294 | default: | |
295 | return offset; | |
296 | } | |
297 | ||
298 | offset += ipv6_optlen(exthdr); | |
299 | *nexthdr = &exthdr->nexthdr; | |
d56f90a7 | 300 | exthdr = (struct ipv6_opt_hdr *)(nh + offset); |
3d126890 NT |
301 | } |
302 | ||
303 | return offset; | |
304 | } | |
305 | ||
306 | static int mip6_destopt_init_state(struct xfrm_state *x) | |
307 | { | |
308 | if (x->id.spi) { | |
309 | printk(KERN_INFO "%s: spi is not 0: %u\n", __FUNCTION__, | |
310 | x->id.spi); | |
311 | return -EINVAL; | |
312 | } | |
313 | if (x->props.mode != XFRM_MODE_ROUTEOPTIMIZATION) { | |
314 | printk(KERN_INFO "%s: state's mode is not %u: %u\n", | |
315 | __FUNCTION__, XFRM_MODE_ROUTEOPTIMIZATION, x->props.mode); | |
316 | return -EINVAL; | |
317 | } | |
318 | ||
319 | x->props.header_len = sizeof(struct ipv6_destopt_hdr) + | |
320 | calc_padlen(sizeof(struct ipv6_destopt_hdr), 6) + | |
321 | sizeof(struct ipv6_destopt_hao); | |
322 | BUG_TRAP(x->props.header_len == 24); | |
323 | ||
324 | return 0; | |
325 | } | |
326 | ||
327 | /* | |
328 | * Do nothing about destroying since it has no specific operation for | |
329 | * destination options header unlike IPsec protocols. | |
330 | */ | |
331 | static void mip6_destopt_destroy(struct xfrm_state *x) | |
332 | { | |
333 | } | |
334 | ||
335 | static struct xfrm_type mip6_destopt_type = | |
336 | { | |
337 | .description = "MIP6DESTOPT", | |
338 | .owner = THIS_MODULE, | |
339 | .proto = IPPROTO_DSTOPTS, | |
340 | .flags = XFRM_TYPE_NON_FRAGMENT, | |
341 | .init_state = mip6_destopt_init_state, | |
342 | .destructor = mip6_destopt_destroy, | |
343 | .input = mip6_destopt_input, | |
344 | .output = mip6_destopt_output, | |
1ab1457c | 345 | .reject = mip6_destopt_reject, |
3d126890 NT |
346 | .hdr_offset = mip6_destopt_offset, |
347 | .local_addr = mip6_xfrm_addr, | |
348 | }; | |
349 | ||
2c8d7ca0 NT |
350 | static int mip6_rthdr_input(struct xfrm_state *x, struct sk_buff *skb) |
351 | { | |
352 | struct rt2_hdr *rt2 = (struct rt2_hdr *)skb->data; | |
353 | ||
354 | if (!ipv6_addr_equal(&rt2->addr, (struct in6_addr *)x->coaddr) && | |
355 | !ipv6_addr_any((struct in6_addr *)x->coaddr)) | |
356 | return -ENOENT; | |
357 | ||
358 | return rt2->rt_hdr.nexthdr; | |
359 | } | |
360 | ||
361 | /* Routing Header type 2 is inserted. | |
362 | * IP Header's dst address is replaced with Routing Header's Home Address. | |
363 | */ | |
364 | static int mip6_rthdr_output(struct xfrm_state *x, struct sk_buff *skb) | |
365 | { | |
366 | struct ipv6hdr *iph; | |
367 | struct rt2_hdr *rt2; | |
368 | u8 nexthdr; | |
369 | ||
7b277b1a | 370 | skb_push(skb, -skb_network_offset(skb)); |
007f0211 | 371 | iph = ipv6_hdr(skb); |
2c8d7ca0 | 372 | |
007f0211 HX |
373 | nexthdr = *skb_mac_header(skb); |
374 | *skb_mac_header(skb) = IPPROTO_ROUTING; | |
2c8d7ca0 | 375 | |
9c70220b | 376 | rt2 = (struct rt2_hdr *)skb_transport_header(skb); |
2c8d7ca0 NT |
377 | rt2->rt_hdr.nexthdr = nexthdr; |
378 | rt2->rt_hdr.hdrlen = (x->props.header_len >> 3) - 1; | |
379 | rt2->rt_hdr.type = IPV6_SRCRT_TYPE_2; | |
380 | rt2->rt_hdr.segments_left = 1; | |
381 | memset(&rt2->reserved, 0, sizeof(rt2->reserved)); | |
382 | ||
383 | BUG_TRAP(rt2->rt_hdr.hdrlen == 2); | |
384 | ||
385 | memcpy(&rt2->addr, &iph->daddr, sizeof(rt2->addr)); | |
b7c6538c | 386 | spin_lock_bh(&x->lock); |
2c8d7ca0 | 387 | memcpy(&iph->daddr, x->coaddr, sizeof(iph->daddr)); |
b7c6538c | 388 | spin_unlock_bh(&x->lock); |
2c8d7ca0 NT |
389 | |
390 | return 0; | |
391 | } | |
392 | ||
393 | static int mip6_rthdr_offset(struct xfrm_state *x, struct sk_buff *skb, | |
394 | u8 **nexthdr) | |
395 | { | |
396 | u16 offset = sizeof(struct ipv6hdr); | |
0660e03f ACM |
397 | struct ipv6_opt_hdr *exthdr = |
398 | (struct ipv6_opt_hdr *)(ipv6_hdr(skb) + 1); | |
d56f90a7 | 399 | const unsigned char *nh = skb_network_header(skb); |
27a884dc | 400 | unsigned int packet_len = skb->tail - skb->network_header; |
2c8d7ca0 NT |
401 | int found_rhdr = 0; |
402 | ||
0660e03f | 403 | *nexthdr = &ipv6_hdr(skb)->nexthdr; |
2c8d7ca0 NT |
404 | |
405 | while (offset + 1 <= packet_len) { | |
406 | ||
407 | switch (**nexthdr) { | |
408 | case NEXTHDR_HOP: | |
409 | break; | |
410 | case NEXTHDR_ROUTING: | |
411 | if (offset + 3 <= packet_len) { | |
412 | struct ipv6_rt_hdr *rt; | |
d56f90a7 | 413 | rt = (struct ipv6_rt_hdr *)(nh + offset); |
2c8d7ca0 NT |
414 | if (rt->type != 0) |
415 | return offset; | |
416 | } | |
417 | found_rhdr = 1; | |
418 | break; | |
419 | case NEXTHDR_DEST: | |
420 | if (ipv6_find_tlv(skb, offset, IPV6_TLV_HAO) >= 0) | |
421 | return offset; | |
422 | ||
423 | if (found_rhdr) | |
424 | return offset; | |
425 | ||
426 | break; | |
427 | default: | |
428 | return offset; | |
429 | } | |
430 | ||
431 | offset += ipv6_optlen(exthdr); | |
432 | *nexthdr = &exthdr->nexthdr; | |
d56f90a7 | 433 | exthdr = (struct ipv6_opt_hdr *)(nh + offset); |
2c8d7ca0 NT |
434 | } |
435 | ||
436 | return offset; | |
437 | } | |
438 | ||
439 | static int mip6_rthdr_init_state(struct xfrm_state *x) | |
440 | { | |
441 | if (x->id.spi) { | |
442 | printk(KERN_INFO "%s: spi is not 0: %u\n", __FUNCTION__, | |
443 | x->id.spi); | |
444 | return -EINVAL; | |
445 | } | |
446 | if (x->props.mode != XFRM_MODE_ROUTEOPTIMIZATION) { | |
447 | printk(KERN_INFO "%s: state's mode is not %u: %u\n", | |
448 | __FUNCTION__, XFRM_MODE_ROUTEOPTIMIZATION, x->props.mode); | |
449 | return -EINVAL; | |
450 | } | |
451 | ||
452 | x->props.header_len = sizeof(struct rt2_hdr); | |
453 | ||
454 | return 0; | |
455 | } | |
456 | ||
457 | /* | |
458 | * Do nothing about destroying since it has no specific operation for routing | |
459 | * header type 2 unlike IPsec protocols. | |
460 | */ | |
461 | static void mip6_rthdr_destroy(struct xfrm_state *x) | |
462 | { | |
463 | } | |
464 | ||
465 | static struct xfrm_type mip6_rthdr_type = | |
466 | { | |
467 | .description = "MIP6RT", | |
468 | .owner = THIS_MODULE, | |
469 | .proto = IPPROTO_ROUTING, | |
470 | .flags = XFRM_TYPE_NON_FRAGMENT, | |
471 | .init_state = mip6_rthdr_init_state, | |
472 | .destructor = mip6_rthdr_destroy, | |
473 | .input = mip6_rthdr_input, | |
474 | .output = mip6_rthdr_output, | |
475 | .hdr_offset = mip6_rthdr_offset, | |
476 | .remote_addr = mip6_xfrm_addr, | |
477 | }; | |
478 | ||
59fbb3a6 | 479 | static int __init mip6_init(void) |
2c8d7ca0 NT |
480 | { |
481 | printk(KERN_INFO "Mobile IPv6\n"); | |
482 | ||
3d126890 NT |
483 | if (xfrm_register_type(&mip6_destopt_type, AF_INET6) < 0) { |
484 | printk(KERN_INFO "%s: can't add xfrm type(destopt)\n", __FUNCTION__); | |
485 | goto mip6_destopt_xfrm_fail; | |
486 | } | |
2c8d7ca0 NT |
487 | if (xfrm_register_type(&mip6_rthdr_type, AF_INET6) < 0) { |
488 | printk(KERN_INFO "%s: can't add xfrm type(rthdr)\n", __FUNCTION__); | |
489 | goto mip6_rthdr_xfrm_fail; | |
490 | } | |
59fbb3a6 MN |
491 | if (rawv6_mh_filter_register(mip6_mh_filter) < 0) { |
492 | printk(KERN_INFO "%s: can't add rawv6 mh filter\n", __FUNCTION__); | |
493 | goto mip6_rawv6_mh_fail; | |
494 | } | |
495 | ||
496 | ||
2c8d7ca0 NT |
497 | return 0; |
498 | ||
59fbb3a6 MN |
499 | mip6_rawv6_mh_fail: |
500 | xfrm_unregister_type(&mip6_rthdr_type, AF_INET6); | |
2c8d7ca0 | 501 | mip6_rthdr_xfrm_fail: |
3d126890 NT |
502 | xfrm_unregister_type(&mip6_destopt_type, AF_INET6); |
503 | mip6_destopt_xfrm_fail: | |
2c8d7ca0 NT |
504 | return -EAGAIN; |
505 | } | |
506 | ||
59fbb3a6 | 507 | static void __exit mip6_fini(void) |
2c8d7ca0 | 508 | { |
59fbb3a6 MN |
509 | if (rawv6_mh_filter_unregister(mip6_mh_filter) < 0) |
510 | printk(KERN_INFO "%s: can't remove rawv6 mh filter\n", __FUNCTION__); | |
2c8d7ca0 NT |
511 | if (xfrm_unregister_type(&mip6_rthdr_type, AF_INET6) < 0) |
512 | printk(KERN_INFO "%s: can't remove xfrm type(rthdr)\n", __FUNCTION__); | |
3d126890 NT |
513 | if (xfrm_unregister_type(&mip6_destopt_type, AF_INET6) < 0) |
514 | printk(KERN_INFO "%s: can't remove xfrm type(destopt)\n", __FUNCTION__); | |
2c8d7ca0 | 515 | } |
59fbb3a6 MN |
516 | |
517 | module_init(mip6_init); | |
518 | module_exit(mip6_fini); | |
519 | ||
520 | MODULE_LICENSE("GPL"); | |
d3d6dd3a MN |
521 | MODULE_ALIAS_XFRM_TYPE(AF_INET6, XFRM_PROTO_DSTOPTS); |
522 | MODULE_ALIAS_XFRM_TYPE(AF_INET6, XFRM_PROTO_ROUTING); |