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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 | ||
3d126890 NT |
37 | static inline unsigned int calc_padlen(unsigned int len, unsigned int n) |
38 | { | |
39 | return (n - len + 16) & 0x7; | |
40 | } | |
41 | ||
42 | static inline void *mip6_padn(__u8 *data, __u8 padlen) | |
43 | { | |
44 | if (!data) | |
45 | return NULL; | |
46 | if (padlen == 1) { | |
47 | data[0] = MIP6_OPT_PAD_1; | |
48 | } else if (padlen > 1) { | |
49 | data[0] = MIP6_OPT_PAD_N; | |
50 | data[1] = padlen - 2; | |
51 | if (padlen > 2) | |
52 | memset(data+2, 0, data[1]); | |
53 | } | |
54 | return data + padlen; | |
55 | } | |
56 | ||
7be96f76 MN |
57 | static inline void mip6_param_prob(struct sk_buff *skb, int code, int pos) |
58 | { | |
59 | icmpv6_send(skb, ICMPV6_PARAMPROB, code, pos, skb->dev); | |
60 | } | |
61 | ||
62 | static int mip6_mh_len(int type) | |
63 | { | |
64 | int len = 0; | |
65 | ||
66 | switch (type) { | |
67 | case IP6_MH_TYPE_BRR: | |
68 | len = 0; | |
69 | break; | |
70 | case IP6_MH_TYPE_HOTI: | |
71 | case IP6_MH_TYPE_COTI: | |
72 | case IP6_MH_TYPE_BU: | |
73 | case IP6_MH_TYPE_BACK: | |
74 | len = 1; | |
75 | break; | |
76 | case IP6_MH_TYPE_HOT: | |
77 | case IP6_MH_TYPE_COT: | |
78 | case IP6_MH_TYPE_BERROR: | |
79 | len = 2; | |
80 | break; | |
81 | } | |
82 | return len; | |
83 | } | |
84 | ||
59fbb3a6 | 85 | static int mip6_mh_filter(struct sock *sk, struct sk_buff *skb) |
7be96f76 MN |
86 | { |
87 | struct ip6_mh *mh; | |
7be96f76 | 88 | |
ea2ae17d ACM |
89 | if (!pskb_may_pull(skb, (skb_transport_offset(skb)) + 8) || |
90 | !pskb_may_pull(skb, (skb_transport_offset(skb) + | |
9c70220b | 91 | ((skb_transport_header(skb)[1] + 1) << 3)))) |
7be96f76 MN |
92 | return -1; |
93 | ||
9c70220b | 94 | mh = (struct ip6_mh *)skb_transport_header(skb); |
7be96f76 MN |
95 | |
96 | if (mh->ip6mh_hdrlen < mip6_mh_len(mh->ip6mh_type)) { | |
97 | LIMIT_NETDEBUG(KERN_DEBUG "mip6: MH message too short: %d vs >=%d\n", | |
98 | mh->ip6mh_hdrlen, mip6_mh_len(mh->ip6mh_type)); | |
d56f90a7 ACM |
99 | mip6_param_prob(skb, 0, ((&mh->ip6mh_hdrlen) - |
100 | skb_network_header(skb))); | |
7be96f76 MN |
101 | return -1; |
102 | } | |
7be96f76 MN |
103 | |
104 | if (mh->ip6mh_proto != IPPROTO_NONE) { | |
105 | LIMIT_NETDEBUG(KERN_DEBUG "mip6: MH invalid payload proto = %d\n", | |
106 | mh->ip6mh_proto); | |
d56f90a7 ACM |
107 | mip6_param_prob(skb, 0, ((&mh->ip6mh_proto) - |
108 | skb_network_header(skb))); | |
7be96f76 MN |
109 | return -1; |
110 | } | |
111 | ||
112 | return 0; | |
113 | } | |
114 | ||
70182ed2 MN |
115 | struct mip6_report_rate_limiter { |
116 | spinlock_t lock; | |
117 | struct timeval stamp; | |
118 | int iif; | |
119 | struct in6_addr src; | |
120 | struct in6_addr dst; | |
121 | }; | |
122 | ||
123 | static struct mip6_report_rate_limiter mip6_report_rl = { | |
4ef8d0ae | 124 | .lock = __SPIN_LOCK_UNLOCKED(mip6_report_rl.lock) |
70182ed2 MN |
125 | }; |
126 | ||
3d126890 NT |
127 | static int mip6_destopt_input(struct xfrm_state *x, struct sk_buff *skb) |
128 | { | |
0660e03f | 129 | struct ipv6hdr *iph = ipv6_hdr(skb); |
3d126890 | 130 | struct ipv6_destopt_hdr *destopt = (struct ipv6_destopt_hdr *)skb->data; |
0ebea8ef | 131 | int err = destopt->nexthdr; |
3d126890 | 132 | |
0ebea8ef | 133 | spin_lock(&x->lock); |
3d126890 NT |
134 | if (!ipv6_addr_equal(&iph->saddr, (struct in6_addr *)x->coaddr) && |
135 | !ipv6_addr_any((struct in6_addr *)x->coaddr)) | |
0ebea8ef HX |
136 | err = -ENOENT; |
137 | spin_unlock(&x->lock); | |
3d126890 | 138 | |
0ebea8ef | 139 | return err; |
3d126890 NT |
140 | } |
141 | ||
142 | /* Destination Option Header is inserted. | |
143 | * IP Header's src address is replaced with Home Address Option in | |
144 | * Destination Option Header. | |
145 | */ | |
146 | static int mip6_destopt_output(struct xfrm_state *x, struct sk_buff *skb) | |
147 | { | |
148 | struct ipv6hdr *iph; | |
149 | struct ipv6_destopt_hdr *dstopt; | |
150 | struct ipv6_destopt_hao *hao; | |
151 | u8 nexthdr; | |
152 | int len; | |
153 | ||
7b277b1a | 154 | skb_push(skb, -skb_network_offset(skb)); |
007f0211 | 155 | iph = ipv6_hdr(skb); |
3d126890 | 156 | |
007f0211 HX |
157 | nexthdr = *skb_mac_header(skb); |
158 | *skb_mac_header(skb) = IPPROTO_DSTOPTS; | |
3d126890 | 159 | |
9c70220b | 160 | dstopt = (struct ipv6_destopt_hdr *)skb_transport_header(skb); |
3d126890 NT |
161 | dstopt->nexthdr = nexthdr; |
162 | ||
163 | hao = mip6_padn((char *)(dstopt + 1), | |
164 | calc_padlen(sizeof(*dstopt), 6)); | |
165 | ||
166 | hao->type = IPV6_TLV_HAO; | |
167 | hao->length = sizeof(*hao) - 2; | |
168 | BUG_TRAP(hao->length == 16); | |
169 | ||
170 | len = ((char *)hao - (char *)dstopt) + sizeof(*hao); | |
171 | ||
172 | memcpy(&hao->addr, &iph->saddr, sizeof(hao->addr)); | |
b7c6538c | 173 | spin_lock_bh(&x->lock); |
3d126890 | 174 | memcpy(&iph->saddr, x->coaddr, sizeof(iph->saddr)); |
b7c6538c | 175 | spin_unlock_bh(&x->lock); |
3d126890 NT |
176 | |
177 | BUG_TRAP(len == x->props.header_len); | |
178 | dstopt->hdrlen = (x->props.header_len >> 3) - 1; | |
179 | ||
180 | return 0; | |
181 | } | |
182 | ||
70182ed2 MN |
183 | static inline int mip6_report_rl_allow(struct timeval *stamp, |
184 | struct in6_addr *dst, | |
185 | struct in6_addr *src, int iif) | |
186 | { | |
187 | int allow = 0; | |
188 | ||
189 | spin_lock_bh(&mip6_report_rl.lock); | |
190 | if (mip6_report_rl.stamp.tv_sec != stamp->tv_sec || | |
191 | mip6_report_rl.stamp.tv_usec != stamp->tv_usec || | |
192 | mip6_report_rl.iif != iif || | |
193 | !ipv6_addr_equal(&mip6_report_rl.src, src) || | |
194 | !ipv6_addr_equal(&mip6_report_rl.dst, dst)) { | |
195 | mip6_report_rl.stamp.tv_sec = stamp->tv_sec; | |
196 | mip6_report_rl.stamp.tv_usec = stamp->tv_usec; | |
197 | mip6_report_rl.iif = iif; | |
198 | ipv6_addr_copy(&mip6_report_rl.src, src); | |
199 | ipv6_addr_copy(&mip6_report_rl.dst, dst); | |
200 | allow = 1; | |
201 | } | |
202 | spin_unlock_bh(&mip6_report_rl.lock); | |
203 | return allow; | |
204 | } | |
205 | ||
206 | static int mip6_destopt_reject(struct xfrm_state *x, struct sk_buff *skb, struct flowi *fl) | |
207 | { | |
208 | struct inet6_skb_parm *opt = (struct inet6_skb_parm *)skb->cb; | |
209 | struct ipv6_destopt_hao *hao = NULL; | |
210 | struct xfrm_selector sel; | |
211 | int offset; | |
212 | struct timeval stamp; | |
213 | int err = 0; | |
214 | ||
e731c248 YH |
215 | if (unlikely(fl->proto == IPPROTO_MH && |
216 | fl->fl_mh_type <= IP6_MH_TYPE_MAX)) | |
01be8e5d MN |
217 | goto out; |
218 | ||
70182ed2 MN |
219 | if (likely(opt->dsthao)) { |
220 | offset = ipv6_find_tlv(skb, opt->dsthao, IPV6_TLV_HAO); | |
221 | if (likely(offset >= 0)) | |
d56f90a7 ACM |
222 | hao = (struct ipv6_destopt_hao *) |
223 | (skb_network_header(skb) + offset); | |
70182ed2 MN |
224 | } |
225 | ||
226 | skb_get_timestamp(skb, &stamp); | |
227 | ||
0660e03f ACM |
228 | if (!mip6_report_rl_allow(&stamp, &ipv6_hdr(skb)->daddr, |
229 | hao ? &hao->addr : &ipv6_hdr(skb)->saddr, | |
70182ed2 MN |
230 | opt->iif)) |
231 | goto out; | |
232 | ||
233 | memset(&sel, 0, sizeof(sel)); | |
0660e03f | 234 | memcpy(&sel.daddr, (xfrm_address_t *)&ipv6_hdr(skb)->daddr, |
70182ed2 MN |
235 | sizeof(sel.daddr)); |
236 | sel.prefixlen_d = 128; | |
0660e03f | 237 | memcpy(&sel.saddr, (xfrm_address_t *)&ipv6_hdr(skb)->saddr, |
70182ed2 MN |
238 | sizeof(sel.saddr)); |
239 | sel.prefixlen_s = 128; | |
240 | sel.family = AF_INET6; | |
241 | sel.proto = fl->proto; | |
242 | sel.dport = xfrm_flowi_dport(fl); | |
243 | if (sel.dport) | |
e69a4adc | 244 | sel.dport_mask = htons(~0); |
70182ed2 MN |
245 | sel.sport = xfrm_flowi_sport(fl); |
246 | if (sel.sport) | |
e69a4adc | 247 | sel.sport_mask = htons(~0); |
70182ed2 MN |
248 | sel.ifindex = fl->oif; |
249 | ||
250 | err = km_report(IPPROTO_DSTOPTS, &sel, | |
251 | (hao ? (xfrm_address_t *)&hao->addr : NULL)); | |
252 | ||
253 | out: | |
254 | return err; | |
255 | } | |
256 | ||
3d126890 NT |
257 | static int mip6_destopt_offset(struct xfrm_state *x, struct sk_buff *skb, |
258 | u8 **nexthdr) | |
259 | { | |
260 | u16 offset = sizeof(struct ipv6hdr); | |
0660e03f ACM |
261 | struct ipv6_opt_hdr *exthdr = |
262 | (struct ipv6_opt_hdr *)(ipv6_hdr(skb) + 1); | |
d56f90a7 | 263 | const unsigned char *nh = skb_network_header(skb); |
27a884dc | 264 | unsigned int packet_len = skb->tail - skb->network_header; |
3d126890 NT |
265 | int found_rhdr = 0; |
266 | ||
0660e03f | 267 | *nexthdr = &ipv6_hdr(skb)->nexthdr; |
3d126890 NT |
268 | |
269 | while (offset + 1 <= packet_len) { | |
270 | ||
271 | switch (**nexthdr) { | |
272 | case NEXTHDR_HOP: | |
273 | break; | |
274 | case NEXTHDR_ROUTING: | |
275 | found_rhdr = 1; | |
276 | break; | |
277 | case NEXTHDR_DEST: | |
278 | /* | |
279 | * HAO MUST NOT appear more than once. | |
280 | * XXX: It is better to try to find by the end of | |
281 | * XXX: packet if HAO exists. | |
282 | */ | |
283 | if (ipv6_find_tlv(skb, offset, IPV6_TLV_HAO) >= 0) { | |
284 | LIMIT_NETDEBUG(KERN_WARNING "mip6: hao exists already, override\n"); | |
285 | return offset; | |
286 | } | |
287 | ||
288 | if (found_rhdr) | |
289 | return offset; | |
290 | ||
291 | break; | |
292 | default: | |
293 | return offset; | |
294 | } | |
295 | ||
296 | offset += ipv6_optlen(exthdr); | |
297 | *nexthdr = &exthdr->nexthdr; | |
d56f90a7 | 298 | exthdr = (struct ipv6_opt_hdr *)(nh + offset); |
3d126890 NT |
299 | } |
300 | ||
301 | return offset; | |
302 | } | |
303 | ||
304 | static int mip6_destopt_init_state(struct xfrm_state *x) | |
305 | { | |
306 | if (x->id.spi) { | |
0dc47877 | 307 | printk(KERN_INFO "%s: spi is not 0: %u\n", __func__, |
3d126890 NT |
308 | x->id.spi); |
309 | return -EINVAL; | |
310 | } | |
311 | if (x->props.mode != XFRM_MODE_ROUTEOPTIMIZATION) { | |
312 | printk(KERN_INFO "%s: state's mode is not %u: %u\n", | |
0dc47877 | 313 | __func__, XFRM_MODE_ROUTEOPTIMIZATION, x->props.mode); |
3d126890 NT |
314 | return -EINVAL; |
315 | } | |
316 | ||
317 | x->props.header_len = sizeof(struct ipv6_destopt_hdr) + | |
318 | calc_padlen(sizeof(struct ipv6_destopt_hdr), 6) + | |
319 | sizeof(struct ipv6_destopt_hao); | |
320 | BUG_TRAP(x->props.header_len == 24); | |
321 | ||
322 | return 0; | |
323 | } | |
324 | ||
325 | /* | |
326 | * Do nothing about destroying since it has no specific operation for | |
327 | * destination options header unlike IPsec protocols. | |
328 | */ | |
329 | static void mip6_destopt_destroy(struct xfrm_state *x) | |
330 | { | |
331 | } | |
332 | ||
533cb5b0 | 333 | static const struct xfrm_type mip6_destopt_type = |
3d126890 NT |
334 | { |
335 | .description = "MIP6DESTOPT", | |
336 | .owner = THIS_MODULE, | |
337 | .proto = IPPROTO_DSTOPTS, | |
f04e7e8d | 338 | .flags = XFRM_TYPE_NON_FRAGMENT | XFRM_TYPE_LOCAL_COADDR, |
3d126890 NT |
339 | .init_state = mip6_destopt_init_state, |
340 | .destructor = mip6_destopt_destroy, | |
341 | .input = mip6_destopt_input, | |
342 | .output = mip6_destopt_output, | |
1ab1457c | 343 | .reject = mip6_destopt_reject, |
3d126890 | 344 | .hdr_offset = mip6_destopt_offset, |
3d126890 NT |
345 | }; |
346 | ||
2c8d7ca0 NT |
347 | static int mip6_rthdr_input(struct xfrm_state *x, struct sk_buff *skb) |
348 | { | |
349 | struct rt2_hdr *rt2 = (struct rt2_hdr *)skb->data; | |
0ebea8ef | 350 | int err = rt2->rt_hdr.nexthdr; |
2c8d7ca0 | 351 | |
0ebea8ef | 352 | spin_lock(&x->lock); |
2c8d7ca0 NT |
353 | if (!ipv6_addr_equal(&rt2->addr, (struct in6_addr *)x->coaddr) && |
354 | !ipv6_addr_any((struct in6_addr *)x->coaddr)) | |
0ebea8ef HX |
355 | err = -ENOENT; |
356 | spin_unlock(&x->lock); | |
2c8d7ca0 | 357 | |
0ebea8ef | 358 | return err; |
2c8d7ca0 NT |
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) { | |
0dc47877 | 442 | printk(KERN_INFO "%s: spi is not 0: %u\n", __func__, |
2c8d7ca0 NT |
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", | |
0dc47877 | 448 | __func__, XFRM_MODE_ROUTEOPTIMIZATION, x->props.mode); |
2c8d7ca0 NT |
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 | ||
533cb5b0 | 465 | static const struct xfrm_type mip6_rthdr_type = |
2c8d7ca0 NT |
466 | { |
467 | .description = "MIP6RT", | |
468 | .owner = THIS_MODULE, | |
469 | .proto = IPPROTO_ROUTING, | |
f04e7e8d | 470 | .flags = XFRM_TYPE_NON_FRAGMENT | XFRM_TYPE_REMOTE_COADDR, |
2c8d7ca0 NT |
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, | |
2c8d7ca0 NT |
476 | }; |
477 | ||
59fbb3a6 | 478 | static int __init mip6_init(void) |
2c8d7ca0 NT |
479 | { |
480 | printk(KERN_INFO "Mobile IPv6\n"); | |
481 | ||
3d126890 | 482 | if (xfrm_register_type(&mip6_destopt_type, AF_INET6) < 0) { |
0dc47877 | 483 | printk(KERN_INFO "%s: can't add xfrm type(destopt)\n", __func__); |
3d126890 NT |
484 | goto mip6_destopt_xfrm_fail; |
485 | } | |
2c8d7ca0 | 486 | if (xfrm_register_type(&mip6_rthdr_type, AF_INET6) < 0) { |
0dc47877 | 487 | printk(KERN_INFO "%s: can't add xfrm type(rthdr)\n", __func__); |
2c8d7ca0 NT |
488 | goto mip6_rthdr_xfrm_fail; |
489 | } | |
59fbb3a6 | 490 | if (rawv6_mh_filter_register(mip6_mh_filter) < 0) { |
0dc47877 | 491 | printk(KERN_INFO "%s: can't add rawv6 mh filter\n", __func__); |
59fbb3a6 MN |
492 | goto mip6_rawv6_mh_fail; |
493 | } | |
494 | ||
495 | ||
2c8d7ca0 NT |
496 | return 0; |
497 | ||
59fbb3a6 MN |
498 | mip6_rawv6_mh_fail: |
499 | xfrm_unregister_type(&mip6_rthdr_type, AF_INET6); | |
2c8d7ca0 | 500 | mip6_rthdr_xfrm_fail: |
3d126890 NT |
501 | xfrm_unregister_type(&mip6_destopt_type, AF_INET6); |
502 | mip6_destopt_xfrm_fail: | |
2c8d7ca0 NT |
503 | return -EAGAIN; |
504 | } | |
505 | ||
59fbb3a6 | 506 | static void __exit mip6_fini(void) |
2c8d7ca0 | 507 | { |
59fbb3a6 | 508 | if (rawv6_mh_filter_unregister(mip6_mh_filter) < 0) |
0dc47877 | 509 | printk(KERN_INFO "%s: can't remove rawv6 mh filter\n", __func__); |
2c8d7ca0 | 510 | if (xfrm_unregister_type(&mip6_rthdr_type, AF_INET6) < 0) |
0dc47877 | 511 | printk(KERN_INFO "%s: can't remove xfrm type(rthdr)\n", __func__); |
3d126890 | 512 | if (xfrm_unregister_type(&mip6_destopt_type, AF_INET6) < 0) |
0dc47877 | 513 | printk(KERN_INFO "%s: can't remove xfrm type(destopt)\n", __func__); |
2c8d7ca0 | 514 | } |
59fbb3a6 MN |
515 | |
516 | module_init(mip6_init); | |
517 | module_exit(mip6_fini); | |
518 | ||
519 | MODULE_LICENSE("GPL"); | |
d3d6dd3a MN |
520 | MODULE_ALIAS_XFRM_TYPE(AF_INET6, XFRM_PROTO_DSTOPTS); |
521 | MODULE_ALIAS_XFRM_TYPE(AF_INET6, XFRM_PROTO_ROUTING); |