Commit | Line | Data |
---|---|---|
6b7326c8 | 1 | #include <linux/err.h> |
1da177e4 LT |
2 | #include <linux/module.h> |
3 | #include <net/ip.h> | |
4 | #include <net/xfrm.h> | |
5 | #include <net/esp.h> | |
72998d8c | 6 | #include <linux/scatterlist.h> |
1da177e4 | 7 | #include <linux/crypto.h> |
a02a6422 | 8 | #include <linux/kernel.h> |
1da177e4 LT |
9 | #include <linux/pfkeyv2.h> |
10 | #include <linux/random.h> | |
b7c6538c | 11 | #include <linux/spinlock.h> |
2017a72c | 12 | #include <linux/in6.h> |
1da177e4 | 13 | #include <net/icmp.h> |
14c85021 | 14 | #include <net/protocol.h> |
1da177e4 LT |
15 | #include <net/udp.h> |
16 | ||
1da177e4 LT |
17 | static int esp_output(struct xfrm_state *x, struct sk_buff *skb) |
18 | { | |
19 | int err; | |
1da177e4 | 20 | struct ip_esp_hdr *esph; |
6b7326c8 HX |
21 | struct crypto_blkcipher *tfm; |
22 | struct blkcipher_desc desc; | |
1da177e4 LT |
23 | struct esp_data *esp; |
24 | struct sk_buff *trailer; | |
27a884dc | 25 | u8 *tail; |
1da177e4 LT |
26 | int blksize; |
27 | int clen; | |
28 | int alen; | |
29 | int nfrags; | |
30 | ||
7b277b1a | 31 | /* skb is pure payload to encrypt */ |
1da177e4 LT |
32 | |
33 | err = -ENOMEM; | |
34 | ||
35 | /* Round to block size */ | |
36 | clen = skb->len; | |
37 | ||
38 | esp = x->data; | |
39 | alen = esp->auth.icv_trunc_len; | |
40 | tfm = esp->conf.tfm; | |
6b7326c8 HX |
41 | desc.tfm = tfm; |
42 | desc.flags = 0; | |
43 | blksize = ALIGN(crypto_blkcipher_blocksize(tfm), 4); | |
a02a6422 | 44 | clen = ALIGN(clen + 2, blksize); |
1da177e4 | 45 | if (esp->conf.padlen) |
a02a6422 | 46 | clen = ALIGN(clen, esp->conf.padlen); |
1da177e4 LT |
47 | |
48 | if ((nfrags = skb_cow_data(skb, clen-skb->len+alen, &trailer)) < 0) | |
49 | goto error; | |
50 | ||
51 | /* Fill padding... */ | |
27a884dc | 52 | tail = skb_tail_pointer(trailer); |
1da177e4 LT |
53 | do { |
54 | int i; | |
55 | for (i=0; i<clen-skb->len - 2; i++) | |
27a884dc | 56 | tail[i] = i + 1; |
1da177e4 | 57 | } while (0); |
27a884dc | 58 | tail[clen - skb->len - 2] = (clen - skb->len) - 2; |
1da177e4 LT |
59 | pskb_put(skb, trailer, clen - skb->len); |
60 | ||
7b277b1a | 61 | skb_push(skb, -skb_network_offset(skb)); |
87bdc48d | 62 | esph = ip_esp_hdr(skb); |
37fedd3a HX |
63 | *(skb_tail_pointer(trailer) - 1) = *skb_mac_header(skb); |
64 | *skb_mac_header(skb) = IPPROTO_ESP; | |
1da177e4 | 65 | |
b7c6538c HX |
66 | spin_lock_bh(&x->lock); |
67 | ||
1da177e4 LT |
68 | /* this is non-NULL only with UDP Encapsulation */ |
69 | if (x->encap) { | |
70 | struct xfrm_encap_tmpl *encap = x->encap; | |
71 | struct udphdr *uh; | |
d5a0a1e3 | 72 | __be32 *udpdata32; |
1da177e4 LT |
73 | |
74 | uh = (struct udphdr *)esph; | |
75 | uh->source = encap->encap_sport; | |
76 | uh->dest = encap->encap_dport; | |
ceb1eec8 | 77 | uh->len = htons(skb->len + alen - skb_transport_offset(skb)); |
1da177e4 LT |
78 | uh->check = 0; |
79 | ||
80 | switch (encap->encap_type) { | |
81 | default: | |
82 | case UDP_ENCAP_ESPINUDP: | |
83 | esph = (struct ip_esp_hdr *)(uh + 1); | |
84 | break; | |
85 | case UDP_ENCAP_ESPINUDP_NON_IKE: | |
d5a0a1e3 | 86 | udpdata32 = (__be32 *)(uh + 1); |
1da177e4 LT |
87 | udpdata32[0] = udpdata32[1] = 0; |
88 | esph = (struct ip_esp_hdr *)(udpdata32 + 2); | |
89 | break; | |
90 | } | |
91 | ||
37fedd3a HX |
92 | *skb_mac_header(skb) = IPPROTO_UDP; |
93 | } | |
1da177e4 LT |
94 | |
95 | esph->spi = x->id.spi; | |
436a0a40 | 96 | esph->seq_no = htonl(XFRM_SKB_CB(skb)->seq); |
1da177e4 | 97 | |
e4bec827 DM |
98 | if (esp->conf.ivlen) { |
99 | if (unlikely(!esp->conf.ivinitted)) { | |
100 | get_random_bytes(esp->conf.ivec, esp->conf.ivlen); | |
101 | esp->conf.ivinitted = 1; | |
102 | } | |
6b7326c8 | 103 | crypto_blkcipher_set_iv(tfm, esp->conf.ivec, esp->conf.ivlen); |
e4bec827 | 104 | } |
1da177e4 LT |
105 | |
106 | do { | |
107 | struct scatterlist *sg = &esp->sgbuf[0]; | |
108 | ||
109 | if (unlikely(nfrags > ESP_NUM_FAST_SG)) { | |
110 | sg = kmalloc(sizeof(struct scatterlist)*nfrags, GFP_ATOMIC); | |
111 | if (!sg) | |
b7c6538c | 112 | goto unlock; |
1da177e4 | 113 | } |
ed0e7e0c | 114 | sg_init_table(sg, nfrags); |
51c739d1 DM |
115 | skb_to_sgvec(skb, sg, |
116 | esph->enc_data + | |
117 | esp->conf.ivlen - | |
118 | skb->data, clen); | |
6b7326c8 | 119 | err = crypto_blkcipher_encrypt(&desc, sg, sg, clen); |
1da177e4 LT |
120 | if (unlikely(sg != &esp->sgbuf[0])) |
121 | kfree(sg); | |
122 | } while (0); | |
123 | ||
6b7326c8 | 124 | if (unlikely(err)) |
b7c6538c | 125 | goto unlock; |
6b7326c8 | 126 | |
1da177e4 | 127 | if (esp->conf.ivlen) { |
6b7326c8 HX |
128 | memcpy(esph->enc_data, esp->conf.ivec, esp->conf.ivlen); |
129 | crypto_blkcipher_get_iv(tfm, esp->conf.ivec, esp->conf.ivlen); | |
1da177e4 LT |
130 | } |
131 | ||
132 | if (esp->auth.icv_full_len) { | |
07d4ee58 HX |
133 | err = esp_mac_digest(esp, skb, (u8 *)esph - skb->data, |
134 | sizeof(*esph) + esp->conf.ivlen + clen); | |
135 | memcpy(pskb_put(skb, trailer, alen), esp->auth.work_icv, alen); | |
1da177e4 LT |
136 | } |
137 | ||
b7c6538c HX |
138 | unlock: |
139 | spin_unlock_bh(&x->lock); | |
140 | ||
1da177e4 LT |
141 | error: |
142 | return err; | |
143 | } | |
144 | ||
145 | /* | |
146 | * Note: detecting truncated vs. non-truncated authentication data is very | |
147 | * expensive, so we only support truncated data, which is the recommended | |
148 | * and common case. | |
149 | */ | |
e695633e | 150 | static int esp_input(struct xfrm_state *x, struct sk_buff *skb) |
1da177e4 LT |
151 | { |
152 | struct iphdr *iph; | |
153 | struct ip_esp_hdr *esph; | |
154 | struct esp_data *esp = x->data; | |
6b7326c8 HX |
155 | struct crypto_blkcipher *tfm = esp->conf.tfm; |
156 | struct blkcipher_desc desc = { .tfm = tfm }; | |
1da177e4 | 157 | struct sk_buff *trailer; |
6b7326c8 | 158 | int blksize = ALIGN(crypto_blkcipher_blocksize(tfm), 4); |
1da177e4 | 159 | int alen = esp->auth.icv_trunc_len; |
87bdc48d | 160 | int elen = skb->len - sizeof(*esph) - esp->conf.ivlen - alen; |
1da177e4 | 161 | int nfrags; |
31a4ab93 | 162 | int ihl; |
4bf05ece HX |
163 | u8 nexthdr[2]; |
164 | struct scatterlist *sg; | |
4bf05ece | 165 | int padlen; |
6b7326c8 | 166 | int err; |
1da177e4 | 167 | |
87bdc48d | 168 | if (!pskb_may_pull(skb, sizeof(*esph))) |
1da177e4 LT |
169 | goto out; |
170 | ||
171 | if (elen <= 0 || (elen & (blksize-1))) | |
172 | goto out; | |
173 | ||
174 | /* If integrity check is required, do this. */ | |
175 | if (esp->auth.icv_full_len) { | |
07d4ee58 | 176 | u8 sum[alen]; |
1da177e4 | 177 | |
07d4ee58 HX |
178 | err = esp_mac_digest(esp, skb, 0, skb->len - alen); |
179 | if (err) | |
180 | goto out; | |
181 | ||
182 | if (skb_copy_bits(skb, skb->len - alen, sum, alen)) | |
1da177e4 LT |
183 | BUG(); |
184 | ||
07d4ee58 | 185 | if (unlikely(memcmp(esp->auth.work_icv, sum, alen))) { |
1da177e4 LT |
186 | x->stats.integrity_failed++; |
187 | goto out; | |
188 | } | |
189 | } | |
190 | ||
191 | if ((nfrags = skb_cow_data(skb, 0, &trailer)) < 0) | |
192 | goto out; | |
193 | ||
194 | skb->ip_summed = CHECKSUM_NONE; | |
195 | ||
87bdc48d | 196 | esph = (struct ip_esp_hdr *)skb->data; |
1da177e4 LT |
197 | |
198 | /* Get ivec. This can be wrong, check against another impls. */ | |
199 | if (esp->conf.ivlen) | |
6b7326c8 | 200 | crypto_blkcipher_set_iv(tfm, esph->enc_data, esp->conf.ivlen); |
1da177e4 | 201 | |
4bf05ece | 202 | sg = &esp->sgbuf[0]; |
1da177e4 | 203 | |
4bf05ece HX |
204 | if (unlikely(nfrags > ESP_NUM_FAST_SG)) { |
205 | sg = kmalloc(sizeof(struct scatterlist)*nfrags, GFP_ATOMIC); | |
206 | if (!sg) | |
207 | goto out; | |
208 | } | |
ed0e7e0c | 209 | sg_init_table(sg, nfrags); |
51c739d1 DM |
210 | skb_to_sgvec(skb, sg, |
211 | sizeof(*esph) + esp->conf.ivlen, | |
212 | elen); | |
6b7326c8 | 213 | err = crypto_blkcipher_decrypt(&desc, sg, sg, elen); |
4bf05ece HX |
214 | if (unlikely(sg != &esp->sgbuf[0])) |
215 | kfree(sg); | |
6b7326c8 HX |
216 | if (unlikely(err)) |
217 | return err; | |
1da177e4 | 218 | |
4bf05ece HX |
219 | if (skb_copy_bits(skb, skb->len-alen-2, nexthdr, 2)) |
220 | BUG(); | |
1da177e4 | 221 | |
4bf05ece HX |
222 | padlen = nexthdr[0]; |
223 | if (padlen+2 >= elen) | |
224 | goto out; | |
1da177e4 | 225 | |
e905a9ed | 226 | /* ... check padding bits here. Silly. :-) */ |
1da177e4 | 227 | |
2017a72c TG |
228 | /* RFC4303: Drop dummy packets without any error */ |
229 | if (nexthdr[1] == IPPROTO_NONE) | |
230 | goto out; | |
231 | ||
eddc9ec5 | 232 | iph = ip_hdr(skb); |
31a4ab93 HX |
233 | ihl = iph->ihl * 4; |
234 | ||
752c1f4c HX |
235 | if (x->encap) { |
236 | struct xfrm_encap_tmpl *encap = x->encap; | |
d56f90a7 | 237 | struct udphdr *uh = (void *)(skb_network_header(skb) + ihl); |
752c1f4c HX |
238 | |
239 | /* | |
240 | * 1) if the NAT-T peer's IP or port changed then | |
241 | * advertize the change to the keying daemon. | |
242 | * This is an inbound SA, so just compare | |
243 | * SRC ports. | |
244 | */ | |
245 | if (iph->saddr != x->props.saddr.a4 || | |
246 | uh->source != encap->encap_sport) { | |
247 | xfrm_address_t ipaddr; | |
248 | ||
249 | ipaddr.a4 = iph->saddr; | |
250 | km_new_mapping(x, &ipaddr, uh->source); | |
e905a9ed | 251 | |
752c1f4c HX |
252 | /* XXX: perhaps add an extra |
253 | * policy check here, to see | |
254 | * if we should allow or | |
255 | * reject a packet from a | |
256 | * different source | |
257 | * address/port. | |
258 | */ | |
1da177e4 | 259 | } |
e905a9ed | 260 | |
752c1f4c HX |
261 | /* |
262 | * 2) ignore UDP/TCP checksums in case | |
263 | * of NAT-T in Transport Mode, or | |
264 | * perform other post-processing fixes | |
265 | * as per draft-ietf-ipsec-udp-encaps-06, | |
266 | * section 3.1.2 | |
267 | */ | |
8bd17075 | 268 | if (x->props.mode == XFRM_MODE_TRANSPORT) |
752c1f4c | 269 | skb->ip_summed = CHECKSUM_UNNECESSARY; |
1da177e4 LT |
270 | } |
271 | ||
4bf05ece | 272 | pskb_trim(skb, skb->len - alen - padlen - 2); |
967b05f6 ACM |
273 | __skb_pull(skb, sizeof(*esph) + esp->conf.ivlen); |
274 | skb_set_transport_header(skb, -ihl); | |
4bf05ece | 275 | |
631a6698 | 276 | return nexthdr[1]; |
1da177e4 LT |
277 | |
278 | out: | |
279 | return -EINVAL; | |
280 | } | |
281 | ||
c5c25238 | 282 | static u32 esp4_get_mtu(struct xfrm_state *x, int mtu) |
1da177e4 LT |
283 | { |
284 | struct esp_data *esp = x->data; | |
6b7326c8 | 285 | u32 blksize = ALIGN(crypto_blkcipher_blocksize(esp->conf.tfm), 4); |
c5c25238 PM |
286 | u32 align = max_t(u32, blksize, esp->conf.padlen); |
287 | u32 rem; | |
288 | ||
289 | mtu -= x->props.header_len + esp->auth.icv_trunc_len; | |
290 | rem = mtu & (align - 1); | |
291 | mtu &= ~(align - 1); | |
0a69452c DB |
292 | |
293 | switch (x->props.mode) { | |
294 | case XFRM_MODE_TUNNEL: | |
0a69452c DB |
295 | break; |
296 | default: | |
297 | case XFRM_MODE_TRANSPORT: | |
298 | /* The worst case */ | |
c5c25238 PM |
299 | mtu -= blksize - 4; |
300 | mtu += min_t(u32, blksize - 4, rem); | |
0a69452c DB |
301 | break; |
302 | case XFRM_MODE_BEET: | |
e905a9ed | 303 | /* The worst case. */ |
c5c25238 | 304 | mtu += min_t(u32, IPV4_BEET_PHMAXLEN, rem); |
0a69452c | 305 | break; |
1da177e4 | 306 | } |
0a69452c | 307 | |
c5c25238 | 308 | return mtu - 2; |
1da177e4 LT |
309 | } |
310 | ||
311 | static void esp4_err(struct sk_buff *skb, u32 info) | |
312 | { | |
313 | struct iphdr *iph = (struct iphdr*)skb->data; | |
314 | struct ip_esp_hdr *esph = (struct ip_esp_hdr*)(skb->data+(iph->ihl<<2)); | |
315 | struct xfrm_state *x; | |
316 | ||
88c7664f ACM |
317 | if (icmp_hdr(skb)->type != ICMP_DEST_UNREACH || |
318 | icmp_hdr(skb)->code != ICMP_FRAG_NEEDED) | |
1da177e4 LT |
319 | return; |
320 | ||
321 | x = xfrm_state_lookup((xfrm_address_t *)&iph->daddr, esph->spi, IPPROTO_ESP, AF_INET); | |
322 | if (!x) | |
323 | return; | |
64ce2073 PM |
324 | NETDEBUG(KERN_DEBUG "pmtu discovery on SA ESP/%08x/%08x\n", |
325 | ntohl(esph->spi), ntohl(iph->daddr)); | |
1da177e4 LT |
326 | xfrm_state_put(x); |
327 | } | |
328 | ||
329 | static void esp_destroy(struct xfrm_state *x) | |
330 | { | |
331 | struct esp_data *esp = x->data; | |
332 | ||
333 | if (!esp) | |
334 | return; | |
335 | ||
6b7326c8 | 336 | crypto_free_blkcipher(esp->conf.tfm); |
573dbd95 JJ |
337 | esp->conf.tfm = NULL; |
338 | kfree(esp->conf.ivec); | |
339 | esp->conf.ivec = NULL; | |
07d4ee58 | 340 | crypto_free_hash(esp->auth.tfm); |
573dbd95 JJ |
341 | esp->auth.tfm = NULL; |
342 | kfree(esp->auth.work_icv); | |
343 | esp->auth.work_icv = NULL; | |
1da177e4 LT |
344 | kfree(esp); |
345 | } | |
346 | ||
72cb6962 | 347 | static int esp_init_state(struct xfrm_state *x) |
1da177e4 LT |
348 | { |
349 | struct esp_data *esp = NULL; | |
6b7326c8 | 350 | struct crypto_blkcipher *tfm; |
c5c25238 | 351 | u32 align; |
1da177e4 | 352 | |
1da177e4 LT |
353 | if (x->ealg == NULL) |
354 | goto error; | |
355 | ||
0da974f4 | 356 | esp = kzalloc(sizeof(*esp), GFP_KERNEL); |
1da177e4 LT |
357 | if (esp == NULL) |
358 | return -ENOMEM; | |
359 | ||
1da177e4 LT |
360 | if (x->aalg) { |
361 | struct xfrm_algo_desc *aalg_desc; | |
07d4ee58 | 362 | struct crypto_hash *hash; |
1da177e4 | 363 | |
07d4ee58 HX |
364 | hash = crypto_alloc_hash(x->aalg->alg_name, 0, |
365 | CRYPTO_ALG_ASYNC); | |
366 | if (IS_ERR(hash)) | |
367 | goto error; | |
368 | ||
369 | esp->auth.tfm = hash; | |
4b7137ff HX |
370 | if (crypto_hash_setkey(hash, x->aalg->alg_key, |
371 | (x->aalg->alg_key_len + 7) / 8)) | |
1da177e4 | 372 | goto error; |
1da177e4 LT |
373 | |
374 | aalg_desc = xfrm_aalg_get_byname(x->aalg->alg_name, 0); | |
375 | BUG_ON(!aalg_desc); | |
376 | ||
377 | if (aalg_desc->uinfo.auth.icv_fullbits/8 != | |
07d4ee58 | 378 | crypto_hash_digestsize(hash)) { |
64ce2073 PM |
379 | NETDEBUG(KERN_INFO "ESP: %s digestsize %u != %hu\n", |
380 | x->aalg->alg_name, | |
07d4ee58 | 381 | crypto_hash_digestsize(hash), |
64ce2073 | 382 | aalg_desc->uinfo.auth.icv_fullbits/8); |
1da177e4 LT |
383 | goto error; |
384 | } | |
385 | ||
386 | esp->auth.icv_full_len = aalg_desc->uinfo.auth.icv_fullbits/8; | |
387 | esp->auth.icv_trunc_len = aalg_desc->uinfo.auth.icv_truncbits/8; | |
388 | ||
389 | esp->auth.work_icv = kmalloc(esp->auth.icv_full_len, GFP_KERNEL); | |
390 | if (!esp->auth.work_icv) | |
391 | goto error; | |
392 | } | |
4b7137ff | 393 | |
6b7326c8 HX |
394 | tfm = crypto_alloc_blkcipher(x->ealg->alg_name, 0, CRYPTO_ALG_ASYNC); |
395 | if (IS_ERR(tfm)) | |
1da177e4 | 396 | goto error; |
6b7326c8 HX |
397 | esp->conf.tfm = tfm; |
398 | esp->conf.ivlen = crypto_blkcipher_ivsize(tfm); | |
1da177e4 LT |
399 | esp->conf.padlen = 0; |
400 | if (esp->conf.ivlen) { | |
401 | esp->conf.ivec = kmalloc(esp->conf.ivlen, GFP_KERNEL); | |
402 | if (unlikely(esp->conf.ivec == NULL)) | |
403 | goto error; | |
e4bec827 | 404 | esp->conf.ivinitted = 0; |
1da177e4 | 405 | } |
4b7137ff HX |
406 | if (crypto_blkcipher_setkey(tfm, x->ealg->alg_key, |
407 | (x->ealg->alg_key_len + 7) / 8)) | |
1da177e4 LT |
408 | goto error; |
409 | x->props.header_len = sizeof(struct ip_esp_hdr) + esp->conf.ivlen; | |
7e49e6de | 410 | if (x->props.mode == XFRM_MODE_TUNNEL) |
1da177e4 | 411 | x->props.header_len += sizeof(struct iphdr); |
ac758e3c PM |
412 | else if (x->props.mode == XFRM_MODE_BEET) |
413 | x->props.header_len += IPV4_BEET_PHMAXLEN; | |
1da177e4 LT |
414 | if (x->encap) { |
415 | struct xfrm_encap_tmpl *encap = x->encap; | |
416 | ||
417 | switch (encap->encap_type) { | |
418 | default: | |
419 | goto error; | |
420 | case UDP_ENCAP_ESPINUDP: | |
421 | x->props.header_len += sizeof(struct udphdr); | |
422 | break; | |
423 | case UDP_ENCAP_ESPINUDP_NON_IKE: | |
424 | x->props.header_len += sizeof(struct udphdr) + 2 * sizeof(u32); | |
425 | break; | |
426 | } | |
427 | } | |
428 | x->data = esp; | |
c5c25238 PM |
429 | align = ALIGN(crypto_blkcipher_blocksize(esp->conf.tfm), 4); |
430 | if (esp->conf.padlen) | |
431 | align = max_t(u32, align, esp->conf.padlen); | |
432 | x->props.trailer_len = align + 1 + esp->auth.icv_trunc_len; | |
1da177e4 LT |
433 | return 0; |
434 | ||
435 | error: | |
436 | x->data = esp; | |
437 | esp_destroy(x); | |
438 | x->data = NULL; | |
439 | return -EINVAL; | |
440 | } | |
441 | ||
442 | static struct xfrm_type esp_type = | |
443 | { | |
444 | .description = "ESP4", | |
445 | .owner = THIS_MODULE, | |
446 | .proto = IPPROTO_ESP, | |
436a0a40 | 447 | .flags = XFRM_TYPE_REPLAY_PROT, |
1da177e4 LT |
448 | .init_state = esp_init_state, |
449 | .destructor = esp_destroy, | |
c5c25238 | 450 | .get_mtu = esp4_get_mtu, |
1da177e4 | 451 | .input = esp_input, |
1da177e4 LT |
452 | .output = esp_output |
453 | }; | |
454 | ||
455 | static struct net_protocol esp4_protocol = { | |
456 | .handler = xfrm4_rcv, | |
457 | .err_handler = esp4_err, | |
458 | .no_policy = 1, | |
459 | }; | |
460 | ||
461 | static int __init esp4_init(void) | |
462 | { | |
1da177e4 LT |
463 | if (xfrm_register_type(&esp_type, AF_INET) < 0) { |
464 | printk(KERN_INFO "ip esp init: can't add xfrm type\n"); | |
465 | return -EAGAIN; | |
466 | } | |
467 | if (inet_add_protocol(&esp4_protocol, IPPROTO_ESP) < 0) { | |
468 | printk(KERN_INFO "ip esp init: can't add protocol\n"); | |
469 | xfrm_unregister_type(&esp_type, AF_INET); | |
470 | return -EAGAIN; | |
471 | } | |
472 | return 0; | |
473 | } | |
474 | ||
475 | static void __exit esp4_fini(void) | |
476 | { | |
477 | if (inet_del_protocol(&esp4_protocol, IPPROTO_ESP) < 0) | |
478 | printk(KERN_INFO "ip esp close: can't remove protocol\n"); | |
479 | if (xfrm_unregister_type(&esp_type, AF_INET) < 0) | |
480 | printk(KERN_INFO "ip esp close: can't remove xfrm type\n"); | |
481 | } | |
482 | ||
483 | module_init(esp4_init); | |
484 | module_exit(esp4_fini); | |
485 | MODULE_LICENSE("GPL"); | |
d3d6dd3a | 486 | MODULE_ALIAS_XFRM_TYPE(AF_INET, XFRM_PROTO_ESP); |