Root/
1 | #include <crypto/aead.h> |
2 | #include <crypto/authenc.h> |
3 | #include <linux/err.h> |
4 | #include <linux/module.h> |
5 | #include <net/ip.h> |
6 | #include <net/xfrm.h> |
7 | #include <net/esp.h> |
8 | #include <linux/scatterlist.h> |
9 | #include <linux/kernel.h> |
10 | #include <linux/pfkeyv2.h> |
11 | #include <linux/rtnetlink.h> |
12 | #include <linux/slab.h> |
13 | #include <linux/spinlock.h> |
14 | #include <linux/in6.h> |
15 | #include <net/icmp.h> |
16 | #include <net/protocol.h> |
17 | #include <net/udp.h> |
18 | |
19 | struct esp_skb_cb { |
20 | struct xfrm_skb_cb xfrm; |
21 | void *tmp; |
22 | }; |
23 | |
24 | #define ESP_SKB_CB(__skb) ((struct esp_skb_cb *)&((__skb)->cb[0])) |
25 | |
26 | /* |
27 | * Allocate an AEAD request structure with extra space for SG and IV. |
28 | * |
29 | * For alignment considerations the IV is placed at the front, followed |
30 | * by the request and finally the SG list. |
31 | * |
32 | * TODO: Use spare space in skb for this where possible. |
33 | */ |
34 | static void *esp_alloc_tmp(struct crypto_aead *aead, int nfrags) |
35 | { |
36 | unsigned int len; |
37 | |
38 | len = crypto_aead_ivsize(aead); |
39 | if (len) { |
40 | len += crypto_aead_alignmask(aead) & |
41 | ~(crypto_tfm_ctx_alignment() - 1); |
42 | len = ALIGN(len, crypto_tfm_ctx_alignment()); |
43 | } |
44 | |
45 | len += sizeof(struct aead_givcrypt_request) + crypto_aead_reqsize(aead); |
46 | len = ALIGN(len, __alignof__(struct scatterlist)); |
47 | |
48 | len += sizeof(struct scatterlist) * nfrags; |
49 | |
50 | return kmalloc(len, GFP_ATOMIC); |
51 | } |
52 | |
53 | static inline u8 *esp_tmp_iv(struct crypto_aead *aead, void *tmp) |
54 | { |
55 | return crypto_aead_ivsize(aead) ? |
56 | PTR_ALIGN((u8 *)tmp, crypto_aead_alignmask(aead) + 1) : tmp; |
57 | } |
58 | |
59 | static inline struct aead_givcrypt_request *esp_tmp_givreq( |
60 | struct crypto_aead *aead, u8 *iv) |
61 | { |
62 | struct aead_givcrypt_request *req; |
63 | |
64 | req = (void *)PTR_ALIGN(iv + crypto_aead_ivsize(aead), |
65 | crypto_tfm_ctx_alignment()); |
66 | aead_givcrypt_set_tfm(req, aead); |
67 | return req; |
68 | } |
69 | |
70 | static inline struct aead_request *esp_tmp_req(struct crypto_aead *aead, u8 *iv) |
71 | { |
72 | struct aead_request *req; |
73 | |
74 | req = (void *)PTR_ALIGN(iv + crypto_aead_ivsize(aead), |
75 | crypto_tfm_ctx_alignment()); |
76 | aead_request_set_tfm(req, aead); |
77 | return req; |
78 | } |
79 | |
80 | static inline struct scatterlist *esp_req_sg(struct crypto_aead *aead, |
81 | struct aead_request *req) |
82 | { |
83 | return (void *)ALIGN((unsigned long)(req + 1) + |
84 | crypto_aead_reqsize(aead), |
85 | __alignof__(struct scatterlist)); |
86 | } |
87 | |
88 | static inline struct scatterlist *esp_givreq_sg( |
89 | struct crypto_aead *aead, struct aead_givcrypt_request *req) |
90 | { |
91 | return (void *)ALIGN((unsigned long)(req + 1) + |
92 | crypto_aead_reqsize(aead), |
93 | __alignof__(struct scatterlist)); |
94 | } |
95 | |
96 | static void esp_output_done(struct crypto_async_request *base, int err) |
97 | { |
98 | struct sk_buff *skb = base->data; |
99 | |
100 | kfree(ESP_SKB_CB(skb)->tmp); |
101 | xfrm_output_resume(skb, err); |
102 | } |
103 | |
104 | static int esp_output(struct xfrm_state *x, struct sk_buff *skb) |
105 | { |
106 | int err; |
107 | struct ip_esp_hdr *esph; |
108 | struct crypto_aead *aead; |
109 | struct aead_givcrypt_request *req; |
110 | struct scatterlist *sg; |
111 | struct scatterlist *asg; |
112 | struct esp_data *esp; |
113 | struct sk_buff *trailer; |
114 | void *tmp; |
115 | u8 *iv; |
116 | u8 *tail; |
117 | int blksize; |
118 | int clen; |
119 | int alen; |
120 | int nfrags; |
121 | |
122 | /* skb is pure payload to encrypt */ |
123 | |
124 | err = -ENOMEM; |
125 | |
126 | /* Round to block size */ |
127 | clen = skb->len; |
128 | |
129 | esp = x->data; |
130 | aead = esp->aead; |
131 | alen = crypto_aead_authsize(aead); |
132 | |
133 | blksize = ALIGN(crypto_aead_blocksize(aead), 4); |
134 | clen = ALIGN(clen + 2, blksize); |
135 | if (esp->padlen) |
136 | clen = ALIGN(clen, esp->padlen); |
137 | |
138 | if ((err = skb_cow_data(skb, clen - skb->len + alen, &trailer)) < 0) |
139 | goto error; |
140 | nfrags = err; |
141 | |
142 | tmp = esp_alloc_tmp(aead, nfrags + 1); |
143 | if (!tmp) |
144 | goto error; |
145 | |
146 | iv = esp_tmp_iv(aead, tmp); |
147 | req = esp_tmp_givreq(aead, iv); |
148 | asg = esp_givreq_sg(aead, req); |
149 | sg = asg + 1; |
150 | |
151 | /* Fill padding... */ |
152 | tail = skb_tail_pointer(trailer); |
153 | do { |
154 | int i; |
155 | for (i=0; i<clen-skb->len - 2; i++) |
156 | tail[i] = i + 1; |
157 | } while (0); |
158 | tail[clen - skb->len - 2] = (clen - skb->len) - 2; |
159 | tail[clen - skb->len - 1] = *skb_mac_header(skb); |
160 | pskb_put(skb, trailer, clen - skb->len + alen); |
161 | |
162 | skb_push(skb, -skb_network_offset(skb)); |
163 | esph = ip_esp_hdr(skb); |
164 | *skb_mac_header(skb) = IPPROTO_ESP; |
165 | |
166 | /* this is non-NULL only with UDP Encapsulation */ |
167 | if (x->encap) { |
168 | struct xfrm_encap_tmpl *encap = x->encap; |
169 | struct udphdr *uh; |
170 | __be32 *udpdata32; |
171 | __be16 sport, dport; |
172 | int encap_type; |
173 | |
174 | spin_lock_bh(&x->lock); |
175 | sport = encap->encap_sport; |
176 | dport = encap->encap_dport; |
177 | encap_type = encap->encap_type; |
178 | spin_unlock_bh(&x->lock); |
179 | |
180 | uh = (struct udphdr *)esph; |
181 | uh->source = sport; |
182 | uh->dest = dport; |
183 | uh->len = htons(skb->len - skb_transport_offset(skb)); |
184 | uh->check = 0; |
185 | |
186 | switch (encap_type) { |
187 | default: |
188 | case UDP_ENCAP_ESPINUDP: |
189 | esph = (struct ip_esp_hdr *)(uh + 1); |
190 | break; |
191 | case UDP_ENCAP_ESPINUDP_NON_IKE: |
192 | udpdata32 = (__be32 *)(uh + 1); |
193 | udpdata32[0] = udpdata32[1] = 0; |
194 | esph = (struct ip_esp_hdr *)(udpdata32 + 2); |
195 | break; |
196 | } |
197 | |
198 | *skb_mac_header(skb) = IPPROTO_UDP; |
199 | } |
200 | |
201 | esph->spi = x->id.spi; |
202 | esph->seq_no = htonl(XFRM_SKB_CB(skb)->seq.output); |
203 | |
204 | sg_init_table(sg, nfrags); |
205 | skb_to_sgvec(skb, sg, |
206 | esph->enc_data + crypto_aead_ivsize(aead) - skb->data, |
207 | clen + alen); |
208 | sg_init_one(asg, esph, sizeof(*esph)); |
209 | |
210 | aead_givcrypt_set_callback(req, 0, esp_output_done, skb); |
211 | aead_givcrypt_set_crypt(req, sg, sg, clen, iv); |
212 | aead_givcrypt_set_assoc(req, asg, sizeof(*esph)); |
213 | aead_givcrypt_set_giv(req, esph->enc_data, |
214 | XFRM_SKB_CB(skb)->seq.output); |
215 | |
216 | ESP_SKB_CB(skb)->tmp = tmp; |
217 | err = crypto_aead_givencrypt(req); |
218 | if (err == -EINPROGRESS) |
219 | goto error; |
220 | |
221 | if (err == -EBUSY) |
222 | err = NET_XMIT_DROP; |
223 | |
224 | kfree(tmp); |
225 | |
226 | error: |
227 | return err; |
228 | } |
229 | |
230 | static int esp_input_done2(struct sk_buff *skb, int err) |
231 | { |
232 | struct iphdr *iph; |
233 | struct xfrm_state *x = xfrm_input_state(skb); |
234 | struct esp_data *esp = x->data; |
235 | struct crypto_aead *aead = esp->aead; |
236 | int alen = crypto_aead_authsize(aead); |
237 | int hlen = sizeof(struct ip_esp_hdr) + crypto_aead_ivsize(aead); |
238 | int elen = skb->len - hlen; |
239 | int ihl; |
240 | u8 nexthdr[2]; |
241 | int padlen; |
242 | |
243 | kfree(ESP_SKB_CB(skb)->tmp); |
244 | |
245 | if (unlikely(err)) |
246 | goto out; |
247 | |
248 | if (skb_copy_bits(skb, skb->len-alen-2, nexthdr, 2)) |
249 | BUG(); |
250 | |
251 | err = -EINVAL; |
252 | padlen = nexthdr[0]; |
253 | if (padlen + 2 + alen >= elen) |
254 | goto out; |
255 | |
256 | /* ... check padding bits here. Silly. :-) */ |
257 | |
258 | iph = ip_hdr(skb); |
259 | ihl = iph->ihl * 4; |
260 | |
261 | if (x->encap) { |
262 | struct xfrm_encap_tmpl *encap = x->encap; |
263 | struct udphdr *uh = (void *)(skb_network_header(skb) + ihl); |
264 | |
265 | /* |
266 | * 1) if the NAT-T peer's IP or port changed then |
267 | * advertize the change to the keying daemon. |
268 | * This is an inbound SA, so just compare |
269 | * SRC ports. |
270 | */ |
271 | if (iph->saddr != x->props.saddr.a4 || |
272 | uh->source != encap->encap_sport) { |
273 | xfrm_address_t ipaddr; |
274 | |
275 | ipaddr.a4 = iph->saddr; |
276 | km_new_mapping(x, &ipaddr, uh->source); |
277 | |
278 | /* XXX: perhaps add an extra |
279 | * policy check here, to see |
280 | * if we should allow or |
281 | * reject a packet from a |
282 | * different source |
283 | * address/port. |
284 | */ |
285 | } |
286 | |
287 | /* |
288 | * 2) ignore UDP/TCP checksums in case |
289 | * of NAT-T in Transport Mode, or |
290 | * perform other post-processing fixes |
291 | * as per draft-ietf-ipsec-udp-encaps-06, |
292 | * section 3.1.2 |
293 | */ |
294 | if (x->props.mode == XFRM_MODE_TRANSPORT) |
295 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
296 | } |
297 | |
298 | pskb_trim(skb, skb->len - alen - padlen - 2); |
299 | __skb_pull(skb, hlen); |
300 | skb_set_transport_header(skb, -ihl); |
301 | |
302 | err = nexthdr[1]; |
303 | |
304 | /* RFC4303: Drop dummy packets without any error */ |
305 | if (err == IPPROTO_NONE) |
306 | err = -EINVAL; |
307 | |
308 | out: |
309 | return err; |
310 | } |
311 | |
312 | static void esp_input_done(struct crypto_async_request *base, int err) |
313 | { |
314 | struct sk_buff *skb = base->data; |
315 | |
316 | xfrm_input_resume(skb, esp_input_done2(skb, err)); |
317 | } |
318 | |
319 | /* |
320 | * Note: detecting truncated vs. non-truncated authentication data is very |
321 | * expensive, so we only support truncated data, which is the recommended |
322 | * and common case. |
323 | */ |
324 | static int esp_input(struct xfrm_state *x, struct sk_buff *skb) |
325 | { |
326 | struct ip_esp_hdr *esph; |
327 | struct esp_data *esp = x->data; |
328 | struct crypto_aead *aead = esp->aead; |
329 | struct aead_request *req; |
330 | struct sk_buff *trailer; |
331 | int elen = skb->len - sizeof(*esph) - crypto_aead_ivsize(aead); |
332 | int nfrags; |
333 | void *tmp; |
334 | u8 *iv; |
335 | struct scatterlist *sg; |
336 | struct scatterlist *asg; |
337 | int err = -EINVAL; |
338 | |
339 | if (!pskb_may_pull(skb, sizeof(*esph) + crypto_aead_ivsize(aead))) |
340 | goto out; |
341 | |
342 | if (elen <= 0) |
343 | goto out; |
344 | |
345 | if ((err = skb_cow_data(skb, 0, &trailer)) < 0) |
346 | goto out; |
347 | nfrags = err; |
348 | |
349 | err = -ENOMEM; |
350 | tmp = esp_alloc_tmp(aead, nfrags + 1); |
351 | if (!tmp) |
352 | goto out; |
353 | |
354 | ESP_SKB_CB(skb)->tmp = tmp; |
355 | iv = esp_tmp_iv(aead, tmp); |
356 | req = esp_tmp_req(aead, iv); |
357 | asg = esp_req_sg(aead, req); |
358 | sg = asg + 1; |
359 | |
360 | skb->ip_summed = CHECKSUM_NONE; |
361 | |
362 | esph = (struct ip_esp_hdr *)skb->data; |
363 | |
364 | /* Get ivec. This can be wrong, check against another impls. */ |
365 | iv = esph->enc_data; |
366 | |
367 | sg_init_table(sg, nfrags); |
368 | skb_to_sgvec(skb, sg, sizeof(*esph) + crypto_aead_ivsize(aead), elen); |
369 | sg_init_one(asg, esph, sizeof(*esph)); |
370 | |
371 | aead_request_set_callback(req, 0, esp_input_done, skb); |
372 | aead_request_set_crypt(req, sg, sg, elen, iv); |
373 | aead_request_set_assoc(req, asg, sizeof(*esph)); |
374 | |
375 | err = crypto_aead_decrypt(req); |
376 | if (err == -EINPROGRESS) |
377 | goto out; |
378 | |
379 | err = esp_input_done2(skb, err); |
380 | |
381 | out: |
382 | return err; |
383 | } |
384 | |
385 | static u32 esp4_get_mtu(struct xfrm_state *x, int mtu) |
386 | { |
387 | struct esp_data *esp = x->data; |
388 | u32 blksize = ALIGN(crypto_aead_blocksize(esp->aead), 4); |
389 | u32 align = max_t(u32, blksize, esp->padlen); |
390 | u32 rem; |
391 | |
392 | mtu -= x->props.header_len + crypto_aead_authsize(esp->aead); |
393 | rem = mtu & (align - 1); |
394 | mtu &= ~(align - 1); |
395 | |
396 | switch (x->props.mode) { |
397 | case XFRM_MODE_TUNNEL: |
398 | break; |
399 | default: |
400 | case XFRM_MODE_TRANSPORT: |
401 | /* The worst case */ |
402 | mtu -= blksize - 4; |
403 | mtu += min_t(u32, blksize - 4, rem); |
404 | break; |
405 | case XFRM_MODE_BEET: |
406 | /* The worst case. */ |
407 | mtu += min_t(u32, IPV4_BEET_PHMAXLEN, rem); |
408 | break; |
409 | } |
410 | |
411 | return mtu - 2; |
412 | } |
413 | |
414 | static void esp4_err(struct sk_buff *skb, u32 info) |
415 | { |
416 | struct net *net = dev_net(skb->dev); |
417 | struct iphdr *iph = (struct iphdr *)skb->data; |
418 | struct ip_esp_hdr *esph = (struct ip_esp_hdr *)(skb->data+(iph->ihl<<2)); |
419 | struct xfrm_state *x; |
420 | |
421 | if (icmp_hdr(skb)->type != ICMP_DEST_UNREACH || |
422 | icmp_hdr(skb)->code != ICMP_FRAG_NEEDED) |
423 | return; |
424 | |
425 | x = xfrm_state_lookup(net, skb->mark, (xfrm_address_t *)&iph->daddr, esph->spi, IPPROTO_ESP, AF_INET); |
426 | if (!x) |
427 | return; |
428 | NETDEBUG(KERN_DEBUG "pmtu discovery on SA ESP/%08x/%08x\n", |
429 | ntohl(esph->spi), ntohl(iph->daddr)); |
430 | xfrm_state_put(x); |
431 | } |
432 | |
433 | static void esp_destroy(struct xfrm_state *x) |
434 | { |
435 | struct esp_data *esp = x->data; |
436 | |
437 | if (!esp) |
438 | return; |
439 | |
440 | crypto_free_aead(esp->aead); |
441 | kfree(esp); |
442 | } |
443 | |
444 | static int esp_init_aead(struct xfrm_state *x) |
445 | { |
446 | struct esp_data *esp = x->data; |
447 | struct crypto_aead *aead; |
448 | int err; |
449 | |
450 | aead = crypto_alloc_aead(x->aead->alg_name, 0, 0); |
451 | err = PTR_ERR(aead); |
452 | if (IS_ERR(aead)) |
453 | goto error; |
454 | |
455 | esp->aead = aead; |
456 | |
457 | err = crypto_aead_setkey(aead, x->aead->alg_key, |
458 | (x->aead->alg_key_len + 7) / 8); |
459 | if (err) |
460 | goto error; |
461 | |
462 | err = crypto_aead_setauthsize(aead, x->aead->alg_icv_len / 8); |
463 | if (err) |
464 | goto error; |
465 | |
466 | error: |
467 | return err; |
468 | } |
469 | |
470 | static int esp_init_authenc(struct xfrm_state *x) |
471 | { |
472 | struct esp_data *esp = x->data; |
473 | struct crypto_aead *aead; |
474 | struct crypto_authenc_key_param *param; |
475 | struct rtattr *rta; |
476 | char *key; |
477 | char *p; |
478 | char authenc_name[CRYPTO_MAX_ALG_NAME]; |
479 | unsigned int keylen; |
480 | int err; |
481 | |
482 | err = -EINVAL; |
483 | if (x->ealg == NULL) |
484 | goto error; |
485 | |
486 | err = -ENAMETOOLONG; |
487 | if (snprintf(authenc_name, CRYPTO_MAX_ALG_NAME, "authenc(%s,%s)", |
488 | x->aalg ? x->aalg->alg_name : "digest_null", |
489 | x->ealg->alg_name) >= CRYPTO_MAX_ALG_NAME) |
490 | goto error; |
491 | |
492 | aead = crypto_alloc_aead(authenc_name, 0, 0); |
493 | err = PTR_ERR(aead); |
494 | if (IS_ERR(aead)) |
495 | goto error; |
496 | |
497 | esp->aead = aead; |
498 | |
499 | keylen = (x->aalg ? (x->aalg->alg_key_len + 7) / 8 : 0) + |
500 | (x->ealg->alg_key_len + 7) / 8 + RTA_SPACE(sizeof(*param)); |
501 | err = -ENOMEM; |
502 | key = kmalloc(keylen, GFP_KERNEL); |
503 | if (!key) |
504 | goto error; |
505 | |
506 | p = key; |
507 | rta = (void *)p; |
508 | rta->rta_type = CRYPTO_AUTHENC_KEYA_PARAM; |
509 | rta->rta_len = RTA_LENGTH(sizeof(*param)); |
510 | param = RTA_DATA(rta); |
511 | p += RTA_SPACE(sizeof(*param)); |
512 | |
513 | if (x->aalg) { |
514 | struct xfrm_algo_desc *aalg_desc; |
515 | |
516 | memcpy(p, x->aalg->alg_key, (x->aalg->alg_key_len + 7) / 8); |
517 | p += (x->aalg->alg_key_len + 7) / 8; |
518 | |
519 | aalg_desc = xfrm_aalg_get_byname(x->aalg->alg_name, 0); |
520 | BUG_ON(!aalg_desc); |
521 | |
522 | err = -EINVAL; |
523 | if (aalg_desc->uinfo.auth.icv_fullbits/8 != |
524 | crypto_aead_authsize(aead)) { |
525 | NETDEBUG(KERN_INFO "ESP: %s digestsize %u != %hu\n", |
526 | x->aalg->alg_name, |
527 | crypto_aead_authsize(aead), |
528 | aalg_desc->uinfo.auth.icv_fullbits/8); |
529 | goto free_key; |
530 | } |
531 | |
532 | err = crypto_aead_setauthsize( |
533 | aead, x->aalg->alg_trunc_len / 8); |
534 | if (err) |
535 | goto free_key; |
536 | } |
537 | |
538 | param->enckeylen = cpu_to_be32((x->ealg->alg_key_len + 7) / 8); |
539 | memcpy(p, x->ealg->alg_key, (x->ealg->alg_key_len + 7) / 8); |
540 | |
541 | err = crypto_aead_setkey(aead, key, keylen); |
542 | |
543 | free_key: |
544 | kfree(key); |
545 | |
546 | error: |
547 | return err; |
548 | } |
549 | |
550 | static int esp_init_state(struct xfrm_state *x) |
551 | { |
552 | struct esp_data *esp; |
553 | struct crypto_aead *aead; |
554 | u32 align; |
555 | int err; |
556 | |
557 | esp = kzalloc(sizeof(*esp), GFP_KERNEL); |
558 | if (esp == NULL) |
559 | return -ENOMEM; |
560 | |
561 | x->data = esp; |
562 | |
563 | if (x->aead) |
564 | err = esp_init_aead(x); |
565 | else |
566 | err = esp_init_authenc(x); |
567 | |
568 | if (err) |
569 | goto error; |
570 | |
571 | aead = esp->aead; |
572 | |
573 | esp->padlen = 0; |
574 | |
575 | x->props.header_len = sizeof(struct ip_esp_hdr) + |
576 | crypto_aead_ivsize(aead); |
577 | if (x->props.mode == XFRM_MODE_TUNNEL) |
578 | x->props.header_len += sizeof(struct iphdr); |
579 | else if (x->props.mode == XFRM_MODE_BEET && x->sel.family != AF_INET6) |
580 | x->props.header_len += IPV4_BEET_PHMAXLEN; |
581 | if (x->encap) { |
582 | struct xfrm_encap_tmpl *encap = x->encap; |
583 | |
584 | switch (encap->encap_type) { |
585 | default: |
586 | goto error; |
587 | case UDP_ENCAP_ESPINUDP: |
588 | x->props.header_len += sizeof(struct udphdr); |
589 | break; |
590 | case UDP_ENCAP_ESPINUDP_NON_IKE: |
591 | x->props.header_len += sizeof(struct udphdr) + 2 * sizeof(u32); |
592 | break; |
593 | } |
594 | } |
595 | |
596 | align = ALIGN(crypto_aead_blocksize(aead), 4); |
597 | if (esp->padlen) |
598 | align = max_t(u32, align, esp->padlen); |
599 | x->props.trailer_len = align + 1 + crypto_aead_authsize(esp->aead); |
600 | |
601 | error: |
602 | return err; |
603 | } |
604 | |
605 | static const struct xfrm_type esp_type = |
606 | { |
607 | .description = "ESP4", |
608 | .owner = THIS_MODULE, |
609 | .proto = IPPROTO_ESP, |
610 | .flags = XFRM_TYPE_REPLAY_PROT, |
611 | .init_state = esp_init_state, |
612 | .destructor = esp_destroy, |
613 | .get_mtu = esp4_get_mtu, |
614 | .input = esp_input, |
615 | .output = esp_output |
616 | }; |
617 | |
618 | static const struct net_protocol esp4_protocol = { |
619 | .handler = xfrm4_rcv, |
620 | .err_handler = esp4_err, |
621 | .no_policy = 1, |
622 | .netns_ok = 1, |
623 | }; |
624 | |
625 | static int __init esp4_init(void) |
626 | { |
627 | if (xfrm_register_type(&esp_type, AF_INET) < 0) { |
628 | printk(KERN_INFO "ip esp init: can't add xfrm type\n"); |
629 | return -EAGAIN; |
630 | } |
631 | if (inet_add_protocol(&esp4_protocol, IPPROTO_ESP) < 0) { |
632 | printk(KERN_INFO "ip esp init: can't add protocol\n"); |
633 | xfrm_unregister_type(&esp_type, AF_INET); |
634 | return -EAGAIN; |
635 | } |
636 | return 0; |
637 | } |
638 | |
639 | static void __exit esp4_fini(void) |
640 | { |
641 | if (inet_del_protocol(&esp4_protocol, IPPROTO_ESP) < 0) |
642 | printk(KERN_INFO "ip esp close: can't remove protocol\n"); |
643 | if (xfrm_unregister_type(&esp_type, AF_INET) < 0) |
644 | printk(KERN_INFO "ip esp close: can't remove xfrm type\n"); |
645 | } |
646 | |
647 | module_init(esp4_init); |
648 | module_exit(esp4_fini); |
649 | MODULE_LICENSE("GPL"); |
650 | MODULE_ALIAS_XFRM_TYPE(AF_INET, XFRM_PROTO_ESP); |
651 |
Branches:
ben-wpan
ben-wpan-stefan
javiroman/ks7010
jz-2.6.34
jz-2.6.34-rc5
jz-2.6.34-rc6
jz-2.6.34-rc7
jz-2.6.35
jz-2.6.36
jz-2.6.37
jz-2.6.38
jz-2.6.39
jz-3.0
jz-3.1
jz-3.11
jz-3.12
jz-3.13
jz-3.15
jz-3.16
jz-3.18-dt
jz-3.2
jz-3.3
jz-3.4
jz-3.5
jz-3.6
jz-3.6-rc2-pwm
jz-3.9
jz-3.9-clk
jz-3.9-rc8
jz47xx
jz47xx-2.6.38
master
Tags:
od-2011-09-04
od-2011-09-18
v2.6.34-rc5
v2.6.34-rc6
v2.6.34-rc7
v3.9