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x86/mm: Add TLB purge to free pmd/pte page interfaces
[linux/fpc-iii.git] / net / ipv6 / esp6.c
blob6a924be66e37384b5f98fe223109e2464b4cb250
1 /*
2 * Copyright (C)2002 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 as published by
6 * the Free Software Foundation; either version 2 of the License, or
7 * (at your option) any later version.
8 *
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
13 *
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, see <http://www.gnu.org/licenses/>.
16 *
17 * Authors
18 *
19 * Mitsuru KANDA @USAGI : IPv6 Support
20 * Kazunori MIYAZAWA @USAGI :
21 * Kunihiro Ishiguro <kunihiro@ipinfusion.com>
22 *
23 * This file is derived from net/ipv4/esp.c
24 */
25
26 #define pr_fmt(fmt) "IPv6: " fmt
27
28 #include <crypto/aead.h>
29 #include <crypto/authenc.h>
30 #include <linux/err.h>
31 #include <linux/module.h>
32 #include <net/ip.h>
33 #include <net/xfrm.h>
34 #include <net/esp.h>
35 #include <linux/scatterlist.h>
36 #include <linux/kernel.h>
37 #include <linux/pfkeyv2.h>
38 #include <linux/random.h>
39 #include <linux/slab.h>
40 #include <linux/spinlock.h>
41 #include <net/ip6_route.h>
42 #include <net/icmp.h>
43 #include <net/ipv6.h>
44 #include <net/protocol.h>
45 #include <linux/icmpv6.h>
46
47 struct esp_skb_cb {
48 struct xfrm_skb_cb xfrm;
49 void *tmp;
50 };
51
52 #define ESP_SKB_CB(__skb) ((struct esp_skb_cb *)&((__skb)->cb[0]))
53
54 static u32 esp6_get_mtu(struct xfrm_state *x, int mtu);
55
56 /*
57 * Allocate an AEAD request structure with extra space for SG and IV.
58 *
59 * For alignment considerations the upper 32 bits of the sequence number are
60 * placed at the front, if present. Followed by the IV, the request and finally
61 * the SG list.
62 *
63 * TODO: Use spare space in skb for this where possible.
64 */
65 static void *esp_alloc_tmp(struct crypto_aead *aead, int nfrags, int seqihlen)
66 {
67 unsigned int len;
68
69 len = seqihlen;
70
71 len += crypto_aead_ivsize(aead);
72
73 if (len) {
74 len += crypto_aead_alignmask(aead) &
75 ~(crypto_tfm_ctx_alignment() - 1);
76 len = ALIGN(len, crypto_tfm_ctx_alignment());
77 }
78
79 len += sizeof(struct aead_request) + crypto_aead_reqsize(aead);
80 len = ALIGN(len, __alignof__(struct scatterlist));
81
82 len += sizeof(struct scatterlist) * nfrags;
83
84 return kmalloc(len, GFP_ATOMIC);
85 }
86
87 static inline __be32 *esp_tmp_seqhi(void *tmp)
88 {
89 return PTR_ALIGN((__be32 *)tmp, __alignof__(__be32));
90 }
91
92 static inline u8 *esp_tmp_iv(struct crypto_aead *aead, void *tmp, int seqhilen)
93 {
94 return crypto_aead_ivsize(aead) ?
95 PTR_ALIGN((u8 *)tmp + seqhilen,
96 crypto_aead_alignmask(aead) + 1) : tmp + seqhilen;
97 }
98
99 static inline struct aead_request *esp_tmp_req(struct crypto_aead *aead, u8 *iv)
100 {
101 struct aead_request *req;
102
103 req = (void *)PTR_ALIGN(iv + crypto_aead_ivsize(aead),
104 crypto_tfm_ctx_alignment());
105 aead_request_set_tfm(req, aead);
106 return req;
107 }
108
109 static inline struct scatterlist *esp_req_sg(struct crypto_aead *aead,
110 struct aead_request *req)
111 {
112 return (void *)ALIGN((unsigned long)(req + 1) +
113 crypto_aead_reqsize(aead),
114 __alignof__(struct scatterlist));
115 }
116
117 static void esp_output_done(struct crypto_async_request *base, int err)
118 {
119 struct sk_buff *skb = base->data;
120
121 kfree(ESP_SKB_CB(skb)->tmp);
122 xfrm_output_resume(skb, err);
123 }
124
125 /* Move ESP header back into place. */
126 static void esp_restore_header(struct sk_buff *skb, unsigned int offset)
127 {
128 struct ip_esp_hdr *esph = (void *)(skb->data + offset);
129 void *tmp = ESP_SKB_CB(skb)->tmp;
130 __be32 *seqhi = esp_tmp_seqhi(tmp);
131
132 esph->seq_no = esph->spi;
133 esph->spi = *seqhi;
134 }
135
136 static void esp_output_restore_header(struct sk_buff *skb)
137 {
138 esp_restore_header(skb, skb_transport_offset(skb) - sizeof(__be32));
139 }
140
141 static void esp_output_done_esn(struct crypto_async_request *base, int err)
142 {
143 struct sk_buff *skb = base->data;
144
145 esp_output_restore_header(skb);
146 esp_output_done(base, err);
147 }
148
149 static int esp6_output(struct xfrm_state *x, struct sk_buff *skb)
150 {
151 int err;
152 struct ip_esp_hdr *esph;
153 struct crypto_aead *aead;
154 struct aead_request *req;
155 struct scatterlist *sg;
156 struct sk_buff *trailer;
157 void *tmp;
158 int blksize;
159 int clen;
160 int alen;
161 int plen;
162 int ivlen;
163 int tfclen;
164 int nfrags;
165 int assoclen;
166 int seqhilen;
167 u8 *iv;
168 u8 *tail;
169 __be32 *seqhi;
170 __be64 seqno;
171
172 /* skb is pure payload to encrypt */
173 aead = x->data;
174 alen = crypto_aead_authsize(aead);
175 ivlen = crypto_aead_ivsize(aead);
176
177 tfclen = 0;
178 if (x->tfcpad) {
179 struct xfrm_dst *dst = (struct xfrm_dst *)skb_dst(skb);
180 u32 padto;
181
182 padto = min(x->tfcpad, esp6_get_mtu(x, dst->child_mtu_cached));
183 if (skb->len < padto)
184 tfclen = padto - skb->len;
185 }
186 blksize = ALIGN(crypto_aead_blocksize(aead), 4);
187 clen = ALIGN(skb->len + 2 + tfclen, blksize);
188 plen = clen - skb->len - tfclen;
189
190 err = skb_cow_data(skb, tfclen + plen + alen, &trailer);
191 if (err < 0)
192 goto error;
193 nfrags = err;
194
195 assoclen = sizeof(*esph);
196 seqhilen = 0;
197
198 if (x->props.flags & XFRM_STATE_ESN) {
199 seqhilen += sizeof(__be32);
200 assoclen += seqhilen;
201 }
202
203 tmp = esp_alloc_tmp(aead, nfrags, seqhilen);
204 if (!tmp) {
205 err = -ENOMEM;
206 goto error;
207 }
208
209 seqhi = esp_tmp_seqhi(tmp);
210 iv = esp_tmp_iv(aead, tmp, seqhilen);
211 req = esp_tmp_req(aead, iv);
212 sg = esp_req_sg(aead, req);
213
214 /* Fill padding... */
215 tail = skb_tail_pointer(trailer);
216 if (tfclen) {
217 memset(tail, 0, tfclen);
218 tail += tfclen;
219 }
220 do {
221 int i;
222 for (i = 0; i < plen - 2; i++)
223 tail[i] = i + 1;
224 } while (0);
225 tail[plen - 2] = plen - 2;
226 tail[plen - 1] = *skb_mac_header(skb);
227 pskb_put(skb, trailer, clen - skb->len + alen);
228
229 skb_push(skb, -skb_network_offset(skb));
230 esph = ip_esp_hdr(skb);
231 *skb_mac_header(skb) = IPPROTO_ESP;
232
233 esph->seq_no = htonl(XFRM_SKB_CB(skb)->seq.output.low);
234
235 aead_request_set_callback(req, 0, esp_output_done, skb);
236
237 /* For ESN we move the header forward by 4 bytes to
238 * accomodate the high bits. We will move it back after
239 * encryption.
240 */
241 if ((x->props.flags & XFRM_STATE_ESN)) {
242 esph = (void *)(skb_transport_header(skb) - sizeof(__be32));
243 *seqhi = esph->spi;
244 esph->seq_no = htonl(XFRM_SKB_CB(skb)->seq.output.hi);
245 aead_request_set_callback(req, 0, esp_output_done_esn, skb);
246 }
247
248 esph->spi = x->id.spi;
249
250 sg_init_table(sg, nfrags);
251 err = skb_to_sgvec(skb, sg,
252 (unsigned char *)esph - skb->data,
253 assoclen + ivlen + clen + alen);
254 if (unlikely(err < 0))
255 goto error;
256
257 aead_request_set_crypt(req, sg, sg, ivlen + clen, iv);
258 aead_request_set_ad(req, assoclen);
259
260 seqno = cpu_to_be64(XFRM_SKB_CB(skb)->seq.output.low +
261 ((u64)XFRM_SKB_CB(skb)->seq.output.hi << 32));
262
263 memset(iv, 0, ivlen);
264 memcpy(iv + ivlen - min(ivlen, 8), (u8 *)&seqno + 8 - min(ivlen, 8),
265 min(ivlen, 8));
266
267 ESP_SKB_CB(skb)->tmp = tmp;
268 err = crypto_aead_encrypt(req);
269
270 switch (err) {
271 case -EINPROGRESS:
272 goto error;
273
274 case -EBUSY:
275 err = NET_XMIT_DROP;
276 break;
277
278 case 0:
279 if ((x->props.flags & XFRM_STATE_ESN))
280 esp_output_restore_header(skb);
281 }
282
283 kfree(tmp);
284
285 error:
286 return err;
287 }
288
289 static int esp_input_done2(struct sk_buff *skb, int err)
290 {
291 struct xfrm_state *x = xfrm_input_state(skb);
292 struct crypto_aead *aead = x->data;
293 int alen = crypto_aead_authsize(aead);
294 int hlen = sizeof(struct ip_esp_hdr) + crypto_aead_ivsize(aead);
295 int elen = skb->len - hlen;
296 int hdr_len = skb_network_header_len(skb);
297 int padlen;
298 u8 nexthdr[2];
299
300 kfree(ESP_SKB_CB(skb)->tmp);
301
302 if (unlikely(err))
303 goto out;
304
305 if (skb_copy_bits(skb, skb->len - alen - 2, nexthdr, 2))
306 BUG();
307
308 err = -EINVAL;
309 padlen = nexthdr[0];
310 if (padlen + 2 + alen >= elen) {
311 net_dbg_ratelimited("ipsec esp packet is garbage padlen=%d, elen=%d\n",
312 padlen + 2, elen - alen);
313 goto out;
314 }
315
316 /* ... check padding bits here. Silly. :-) */
317
318 pskb_trim(skb, skb->len - alen - padlen - 2);
319 __skb_pull(skb, hlen);
320 if (x->props.mode == XFRM_MODE_TUNNEL)
321 skb_reset_transport_header(skb);
322 else
323 skb_set_transport_header(skb, -hdr_len);
324
325 err = nexthdr[1];
326
327 /* RFC4303: Drop dummy packets without any error */
328 if (err == IPPROTO_NONE)
329 err = -EINVAL;
330
331 out:
332 return err;
333 }
334
335 static void esp_input_done(struct crypto_async_request *base, int err)
336 {
337 struct sk_buff *skb = base->data;
338
339 xfrm_input_resume(skb, esp_input_done2(skb, err));
340 }
341
342 static void esp_input_restore_header(struct sk_buff *skb)
343 {
344 esp_restore_header(skb, 0);
345 __skb_pull(skb, 4);
346 }
347
348 static void esp_input_done_esn(struct crypto_async_request *base, int err)
349 {
350 struct sk_buff *skb = base->data;
351
352 esp_input_restore_header(skb);
353 esp_input_done(base, err);
354 }
355
356 static int esp6_input(struct xfrm_state *x, struct sk_buff *skb)
357 {
358 struct ip_esp_hdr *esph;
359 struct crypto_aead *aead = x->data;
360 struct aead_request *req;
361 struct sk_buff *trailer;
362 int ivlen = crypto_aead_ivsize(aead);
363 int elen = skb->len - sizeof(*esph) - ivlen;
364 int nfrags;
365 int assoclen;
366 int seqhilen;
367 int ret = 0;
368 void *tmp;
369 __be32 *seqhi;
370 u8 *iv;
371 struct scatterlist *sg;
372
373 if (!pskb_may_pull(skb, sizeof(*esph) + ivlen)) {
374 ret = -EINVAL;
375 goto out;
376 }
377
378 if (elen <= 0) {
379 ret = -EINVAL;
380 goto out;
381 }
382
383 nfrags = skb_cow_data(skb, 0, &trailer);
384 if (nfrags < 0) {
385 ret = -EINVAL;
386 goto out;
387 }
388
389 ret = -ENOMEM;
390
391 assoclen = sizeof(*esph);
392 seqhilen = 0;
393
394 if (x->props.flags & XFRM_STATE_ESN) {
395 seqhilen += sizeof(__be32);
396 assoclen += seqhilen;
397 }
398
399 tmp = esp_alloc_tmp(aead, nfrags, seqhilen);
400 if (!tmp)
401 goto out;
402
403 ESP_SKB_CB(skb)->tmp = tmp;
404 seqhi = esp_tmp_seqhi(tmp);
405 iv = esp_tmp_iv(aead, tmp, seqhilen);
406 req = esp_tmp_req(aead, iv);
407 sg = esp_req_sg(aead, req);
408
409 skb->ip_summed = CHECKSUM_NONE;
410
411 esph = (struct ip_esp_hdr *)skb->data;
412
413 aead_request_set_callback(req, 0, esp_input_done, skb);
414
415 /* For ESN we move the header forward by 4 bytes to
416 * accomodate the high bits. We will move it back after
417 * decryption.
418 */
419 if ((x->props.flags & XFRM_STATE_ESN)) {
420 esph = (void *)skb_push(skb, 4);
421 *seqhi = esph->spi;
422 esph->spi = esph->seq_no;
423 esph->seq_no = XFRM_SKB_CB(skb)->seq.input.hi;
424 aead_request_set_callback(req, 0, esp_input_done_esn, skb);
425 }
426
427 sg_init_table(sg, nfrags);
428 ret = skb_to_sgvec(skb, sg, 0, skb->len);
429 if (unlikely(ret < 0))
430 goto out;
431
432 aead_request_set_crypt(req, sg, sg, elen + ivlen, iv);
433 aead_request_set_ad(req, assoclen);
434
435 ret = crypto_aead_decrypt(req);
436 if (ret == -EINPROGRESS)
437 goto out;
438
439 if ((x->props.flags & XFRM_STATE_ESN))
440 esp_input_restore_header(skb);
441
442 ret = esp_input_done2(skb, ret);
443
444 out:
445 return ret;
446 }
447
448 static u32 esp6_get_mtu(struct xfrm_state *x, int mtu)
449 {
450 struct crypto_aead *aead = x->data;
451 u32 blksize = ALIGN(crypto_aead_blocksize(aead), 4);
452 unsigned int net_adj;
453
454 if (x->props.mode != XFRM_MODE_TUNNEL)
455 net_adj = sizeof(struct ipv6hdr);
456 else
457 net_adj = 0;
458
459 return ((mtu - x->props.header_len - crypto_aead_authsize(aead) -
460 net_adj) & ~(blksize - 1)) + net_adj - 2;
461 }
462
463 static int esp6_err(struct sk_buff *skb, struct inet6_skb_parm *opt,
464 u8 type, u8 code, int offset, __be32 info)
465 {
466 struct net *net = dev_net(skb->dev);
467 const struct ipv6hdr *iph = (const struct ipv6hdr *)skb->data;
468 struct ip_esp_hdr *esph = (struct ip_esp_hdr *)(skb->data + offset);
469 struct xfrm_state *x;
470
471 if (type != ICMPV6_PKT_TOOBIG &&
472 type != NDISC_REDIRECT)
473 return 0;
474
475 x = xfrm_state_lookup(net, skb->mark, (const xfrm_address_t *)&iph->daddr,
476 esph->spi, IPPROTO_ESP, AF_INET6);
477 if (!x)
478 return 0;
479
480 if (type == NDISC_REDIRECT)
481 ip6_redirect(skb, net, skb->dev->ifindex, 0);
482 else
483 ip6_update_pmtu(skb, net, info, 0, 0);
484 xfrm_state_put(x);
485
486 return 0;
487 }
488
489 static void esp6_destroy(struct xfrm_state *x)
490 {
491 struct crypto_aead *aead = x->data;
492
493 if (!aead)
494 return;
495
496 crypto_free_aead(aead);
497 }
498
499 static int esp_init_aead(struct xfrm_state *x)
500 {
501 char aead_name[CRYPTO_MAX_ALG_NAME];
502 struct crypto_aead *aead;
503 int err;
504
505 err = -ENAMETOOLONG;
506 if (snprintf(aead_name, CRYPTO_MAX_ALG_NAME, "%s(%s)",
507 x->geniv, x->aead->alg_name) >= CRYPTO_MAX_ALG_NAME)
508 goto error;
509
510 aead = crypto_alloc_aead(aead_name, 0, 0);
511 err = PTR_ERR(aead);
512 if (IS_ERR(aead))
513 goto error;
514
515 x->data = aead;
516
517 err = crypto_aead_setkey(aead, x->aead->alg_key,
518 (x->aead->alg_key_len + 7) / 8);
519 if (err)
520 goto error;
521
522 err = crypto_aead_setauthsize(aead, x->aead->alg_icv_len / 8);
523 if (err)
524 goto error;
525
526 error:
527 return err;
528 }
529
530 static int esp_init_authenc(struct xfrm_state *x)
531 {
532 struct crypto_aead *aead;
533 struct crypto_authenc_key_param *param;
534 struct rtattr *rta;
535 char *key;
536 char *p;
537 char authenc_name[CRYPTO_MAX_ALG_NAME];
538 unsigned int keylen;
539 int err;
540
541 err = -EINVAL;
542 if (!x->ealg)
543 goto error;
544
545 err = -ENAMETOOLONG;
546
547 if ((x->props.flags & XFRM_STATE_ESN)) {
548 if (snprintf(authenc_name, CRYPTO_MAX_ALG_NAME,
549 "%s%sauthencesn(%s,%s)%s",
550 x->geniv ?: "", x->geniv ? "(" : "",
551 x->aalg ? x->aalg->alg_name : "digest_null",
552 x->ealg->alg_name,
553 x->geniv ? ")" : "") >= CRYPTO_MAX_ALG_NAME)
554 goto error;
555 } else {
556 if (snprintf(authenc_name, CRYPTO_MAX_ALG_NAME,
557 "%s%sauthenc(%s,%s)%s",
558 x->geniv ?: "", x->geniv ? "(" : "",
559 x->aalg ? x->aalg->alg_name : "digest_null",
560 x->ealg->alg_name,
561 x->geniv ? ")" : "") >= CRYPTO_MAX_ALG_NAME)
562 goto error;
563 }
564
565 aead = crypto_alloc_aead(authenc_name, 0, 0);
566 err = PTR_ERR(aead);
567 if (IS_ERR(aead))
568 goto error;
569
570 x->data = aead;
571
572 keylen = (x->aalg ? (x->aalg->alg_key_len + 7) / 8 : 0) +
573 (x->ealg->alg_key_len + 7) / 8 + RTA_SPACE(sizeof(*param));
574 err = -ENOMEM;
575 key = kmalloc(keylen, GFP_KERNEL);
576 if (!key)
577 goto error;
578
579 p = key;
580 rta = (void *)p;
581 rta->rta_type = CRYPTO_AUTHENC_KEYA_PARAM;
582 rta->rta_len = RTA_LENGTH(sizeof(*param));
583 param = RTA_DATA(rta);
584 p += RTA_SPACE(sizeof(*param));
585
586 if (x->aalg) {
587 struct xfrm_algo_desc *aalg_desc;
588
589 memcpy(p, x->aalg->alg_key, (x->aalg->alg_key_len + 7) / 8);
590 p += (x->aalg->alg_key_len + 7) / 8;
591
592 aalg_desc = xfrm_aalg_get_byname(x->aalg->alg_name, 0);
593 BUG_ON(!aalg_desc);
594
595 err = -EINVAL;
596 if (aalg_desc->uinfo.auth.icv_fullbits / 8 !=
597 crypto_aead_authsize(aead)) {
598 pr_info("ESP: %s digestsize %u != %hu\n",
599 x->aalg->alg_name,
600 crypto_aead_authsize(aead),
601 aalg_desc->uinfo.auth.icv_fullbits / 8);
602 goto free_key;
603 }
604
605 err = crypto_aead_setauthsize(
606 aead, x->aalg->alg_trunc_len / 8);
607 if (err)
608 goto free_key;
609 }
610
611 param->enckeylen = cpu_to_be32((x->ealg->alg_key_len + 7) / 8);
612 memcpy(p, x->ealg->alg_key, (x->ealg->alg_key_len + 7) / 8);
613
614 err = crypto_aead_setkey(aead, key, keylen);
615
616 free_key:
617 kfree(key);
618
619 error:
620 return err;
621 }
622
623 static int esp6_init_state(struct xfrm_state *x)
624 {
625 struct crypto_aead *aead;
626 u32 align;
627 int err;
628
629 if (x->encap)
630 return -EINVAL;
631
632 x->data = NULL;
633
634 if (x->aead)
635 err = esp_init_aead(x);
636 else
637 err = esp_init_authenc(x);
638
639 if (err)
640 goto error;
641
642 aead = x->data;
643
644 x->props.header_len = sizeof(struct ip_esp_hdr) +
645 crypto_aead_ivsize(aead);
646 switch (x->props.mode) {
647 case XFRM_MODE_BEET:
648 if (x->sel.family != AF_INET6)
649 x->props.header_len += IPV4_BEET_PHMAXLEN +
650 (sizeof(struct ipv6hdr) - sizeof(struct iphdr));
651 break;
652 case XFRM_MODE_TRANSPORT:
653 break;
654 case XFRM_MODE_TUNNEL:
655 x->props.header_len += sizeof(struct ipv6hdr);
656 break;
657 default:
658 goto error;
659 }
660
661 align = ALIGN(crypto_aead_blocksize(aead), 4);
662 x->props.trailer_len = align + 1 + crypto_aead_authsize(aead);
663
664 error:
665 return err;
666 }
667
668 static int esp6_rcv_cb(struct sk_buff *skb, int err)
669 {
670 return 0;
671 }
672
673 static const struct xfrm_type esp6_type = {
674 .description = "ESP6",
675 .owner = THIS_MODULE,
676 .proto = IPPROTO_ESP,
677 .flags = XFRM_TYPE_REPLAY_PROT,
678 .init_state = esp6_init_state,
679 .destructor = esp6_destroy,
680 .get_mtu = esp6_get_mtu,
681 .input = esp6_input,
682 .output = esp6_output,
683 .hdr_offset = xfrm6_find_1stfragopt,
684 };
685
686 static struct xfrm6_protocol esp6_protocol = {
687 .handler = xfrm6_rcv,
688 .cb_handler = esp6_rcv_cb,
689 .err_handler = esp6_err,
690 .priority = 0,
691 };
692
693 static int __init esp6_init(void)
694 {
695 if (xfrm_register_type(&esp6_type, AF_INET6) < 0) {
696 pr_info("%s: can't add xfrm type\n", __func__);
697 return -EAGAIN;
698 }
699 if (xfrm6_protocol_register(&esp6_protocol, IPPROTO_ESP) < 0) {
700 pr_info("%s: can't add protocol\n", __func__);
701 xfrm_unregister_type(&esp6_type, AF_INET6);
702 return -EAGAIN;
703 }
704
705 return 0;
706 }
707
708 static void __exit esp6_fini(void)
709 {
710 if (xfrm6_protocol_deregister(&esp6_protocol, IPPROTO_ESP) < 0)
711 pr_info("%s: can't remove protocol\n", __func__);
712 if (xfrm_unregister_type(&esp6_type, AF_INET6) < 0)
713 pr_info("%s: can't remove xfrm type\n", __func__);
714 }
715
716 module_init(esp6_init);
717 module_exit(esp6_fini);
718
719 MODULE_LICENSE("GPL");
720 MODULE_ALIAS_XFRM_TYPE(AF_INET6, XFRM_PROTO_ESP);
Linux with added FPC-III support