Thomas Gleixner | 1ccea77 | 2019-05-19 15:51:43 +0200 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2 | /* |
| 3 | * Copyright (C)2002 USAGI/WIDE Project |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 4 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 5 | * Authors |
| 6 | * |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 7 | * Mitsuru KANDA @USAGI : IPv6 Support |
Ian Morris | 67ba415 | 2014-08-24 21:53:10 +0100 | [diff] [blame] | 8 | * Kazunori MIYAZAWA @USAGI : |
| 9 | * Kunihiro Ishiguro <kunihiro@ipinfusion.com> |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 10 | * |
Ian Morris | 67ba415 | 2014-08-24 21:53:10 +0100 | [diff] [blame] | 11 | * This file is derived from net/ipv4/esp.c |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 12 | */ |
| 13 | |
Joe Perches | f321383 | 2012-05-15 14:11:53 +0000 | [diff] [blame] | 14 | #define pr_fmt(fmt) "IPv6: " fmt |
| 15 | |
Herbert Xu | 38320c7 | 2008-01-28 19:35:05 -0800 | [diff] [blame] | 16 | #include <crypto/aead.h> |
| 17 | #include <crypto/authenc.h> |
Herbert Xu | 6b7326c | 2006-07-30 15:41:01 +1000 | [diff] [blame] | 18 | #include <linux/err.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 19 | #include <linux/module.h> |
| 20 | #include <net/ip.h> |
| 21 | #include <net/xfrm.h> |
| 22 | #include <net/esp.h> |
Adrian Bunk | 72998d8 | 2007-10-26 22:53:58 -0700 | [diff] [blame] | 23 | #include <linux/scatterlist.h> |
Herbert Xu | a02a642 | 2005-10-10 21:11:08 -0700 | [diff] [blame] | 24 | #include <linux/kernel.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | #include <linux/pfkeyv2.h> |
| 26 | #include <linux/random.h> |
Herbert Xu | 38320c7 | 2008-01-28 19:35:05 -0800 | [diff] [blame] | 27 | #include <linux/slab.h> |
Herbert Xu | b7c6538c | 2007-10-09 13:33:35 -0700 | [diff] [blame] | 28 | #include <linux/spinlock.h> |
David S. Miller | 81aded2 | 2012-06-15 14:54:11 -0700 | [diff] [blame] | 29 | #include <net/ip6_route.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | #include <net/icmp.h> |
| 31 | #include <net/ipv6.h> |
Arnaldo Carvalho de Melo | 14c8502 | 2005-12-27 02:43:12 -0200 | [diff] [blame] | 32 | #include <net/protocol.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | #include <linux/icmpv6.h> |
| 34 | |
Steffen Klassert | 03e2a30 | 2017-01-17 10:23:03 +0100 | [diff] [blame] | 35 | #include <linux/highmem.h> |
| 36 | |
Herbert Xu | 38320c7 | 2008-01-28 19:35:05 -0800 | [diff] [blame] | 37 | struct esp_skb_cb { |
| 38 | struct xfrm_skb_cb xfrm; |
| 39 | void *tmp; |
| 40 | }; |
| 41 | |
| 42 | #define ESP_SKB_CB(__skb) ((struct esp_skb_cb *)&((__skb)->cb[0])) |
| 43 | |
| 44 | /* |
| 45 | * Allocate an AEAD request structure with extra space for SG and IV. |
| 46 | * |
Steffen Klassert | d212a4c | 2011-03-08 00:07:51 +0000 | [diff] [blame] | 47 | * For alignment considerations the upper 32 bits of the sequence number are |
| 48 | * placed at the front, if present. Followed by the IV, the request and finally |
| 49 | * the SG list. |
Herbert Xu | 38320c7 | 2008-01-28 19:35:05 -0800 | [diff] [blame] | 50 | * |
| 51 | * TODO: Use spare space in skb for this where possible. |
| 52 | */ |
Steffen Klassert | d212a4c | 2011-03-08 00:07:51 +0000 | [diff] [blame] | 53 | static void *esp_alloc_tmp(struct crypto_aead *aead, int nfrags, int seqihlen) |
Herbert Xu | 38320c7 | 2008-01-28 19:35:05 -0800 | [diff] [blame] | 54 | { |
| 55 | unsigned int len; |
| 56 | |
Steffen Klassert | d212a4c | 2011-03-08 00:07:51 +0000 | [diff] [blame] | 57 | len = seqihlen; |
| 58 | |
| 59 | len += crypto_aead_ivsize(aead); |
| 60 | |
Herbert Xu | 38320c7 | 2008-01-28 19:35:05 -0800 | [diff] [blame] | 61 | if (len) { |
| 62 | len += crypto_aead_alignmask(aead) & |
| 63 | ~(crypto_tfm_ctx_alignment() - 1); |
| 64 | len = ALIGN(len, crypto_tfm_ctx_alignment()); |
| 65 | } |
| 66 | |
Herbert Xu | 000ae7b | 2015-05-27 16:03:47 +0800 | [diff] [blame] | 67 | len += sizeof(struct aead_request) + crypto_aead_reqsize(aead); |
Herbert Xu | 38320c7 | 2008-01-28 19:35:05 -0800 | [diff] [blame] | 68 | len = ALIGN(len, __alignof__(struct scatterlist)); |
| 69 | |
| 70 | len += sizeof(struct scatterlist) * nfrags; |
| 71 | |
| 72 | return kmalloc(len, GFP_ATOMIC); |
| 73 | } |
| 74 | |
Steffen Klassert | d212a4c | 2011-03-08 00:07:51 +0000 | [diff] [blame] | 75 | static inline __be32 *esp_tmp_seqhi(void *tmp) |
| 76 | { |
| 77 | return PTR_ALIGN((__be32 *)tmp, __alignof__(__be32)); |
| 78 | } |
| 79 | |
| 80 | static inline u8 *esp_tmp_iv(struct crypto_aead *aead, void *tmp, int seqhilen) |
Herbert Xu | 38320c7 | 2008-01-28 19:35:05 -0800 | [diff] [blame] | 81 | { |
| 82 | return crypto_aead_ivsize(aead) ? |
Steffen Klassert | d212a4c | 2011-03-08 00:07:51 +0000 | [diff] [blame] | 83 | PTR_ALIGN((u8 *)tmp + seqhilen, |
| 84 | crypto_aead_alignmask(aead) + 1) : tmp + seqhilen; |
Herbert Xu | 38320c7 | 2008-01-28 19:35:05 -0800 | [diff] [blame] | 85 | } |
| 86 | |
Herbert Xu | 38320c7 | 2008-01-28 19:35:05 -0800 | [diff] [blame] | 87 | static inline struct aead_request *esp_tmp_req(struct crypto_aead *aead, u8 *iv) |
| 88 | { |
| 89 | struct aead_request *req; |
| 90 | |
| 91 | req = (void *)PTR_ALIGN(iv + crypto_aead_ivsize(aead), |
| 92 | crypto_tfm_ctx_alignment()); |
| 93 | aead_request_set_tfm(req, aead); |
| 94 | return req; |
| 95 | } |
| 96 | |
| 97 | static inline struct scatterlist *esp_req_sg(struct crypto_aead *aead, |
| 98 | struct aead_request *req) |
| 99 | { |
| 100 | return (void *)ALIGN((unsigned long)(req + 1) + |
| 101 | crypto_aead_reqsize(aead), |
| 102 | __alignof__(struct scatterlist)); |
| 103 | } |
| 104 | |
Steffen Klassert | 03e2a30 | 2017-01-17 10:23:03 +0100 | [diff] [blame] | 105 | static void esp_ssg_unref(struct xfrm_state *x, void *tmp) |
| 106 | { |
Steffen Klassert | 03e2a30 | 2017-01-17 10:23:03 +0100 | [diff] [blame] | 107 | struct crypto_aead *aead = x->data; |
| 108 | int seqhilen = 0; |
| 109 | u8 *iv; |
| 110 | struct aead_request *req; |
| 111 | struct scatterlist *sg; |
| 112 | |
| 113 | if (x->props.flags & XFRM_STATE_ESN) |
| 114 | seqhilen += sizeof(__be32); |
| 115 | |
Steffen Klassert | 03e2a30 | 2017-01-17 10:23:03 +0100 | [diff] [blame] | 116 | iv = esp_tmp_iv(aead, tmp, seqhilen); |
| 117 | req = esp_tmp_req(aead, iv); |
| 118 | |
| 119 | /* Unref skb_frag_pages in the src scatterlist if necessary. |
| 120 | * Skip the first sg which comes from skb->data. |
| 121 | */ |
| 122 | if (req->src != req->dst) |
| 123 | for (sg = sg_next(req->src); sg; sg = sg_next(sg)) |
| 124 | put_page(sg_page(sg)); |
| 125 | } |
| 126 | |
Herbert Xu | 38320c7 | 2008-01-28 19:35:05 -0800 | [diff] [blame] | 127 | static void esp_output_done(struct crypto_async_request *base, int err) |
| 128 | { |
| 129 | struct sk_buff *skb = base->data; |
Steffen Klassert | f53c723 | 2017-12-20 10:41:36 +0100 | [diff] [blame] | 130 | struct xfrm_offload *xo = xfrm_offload(skb); |
Steffen Klassert | 03e2a30 | 2017-01-17 10:23:03 +0100 | [diff] [blame] | 131 | void *tmp; |
Steffen Klassert | f53c723 | 2017-12-20 10:41:36 +0100 | [diff] [blame] | 132 | struct xfrm_state *x; |
| 133 | |
Florian Westphal | 2294be0f | 2018-12-18 17:15:20 +0100 | [diff] [blame] | 134 | if (xo && (xo->flags & XFRM_DEV_RESUME)) { |
| 135 | struct sec_path *sp = skb_sec_path(skb); |
| 136 | |
| 137 | x = sp->xvec[sp->len - 1]; |
| 138 | } else { |
Steffen Klassert | f53c723 | 2017-12-20 10:41:36 +0100 | [diff] [blame] | 139 | x = skb_dst(skb)->xfrm; |
Florian Westphal | 2294be0f | 2018-12-18 17:15:20 +0100 | [diff] [blame] | 140 | } |
Herbert Xu | 38320c7 | 2008-01-28 19:35:05 -0800 | [diff] [blame] | 141 | |
Steffen Klassert | 03e2a30 | 2017-01-17 10:23:03 +0100 | [diff] [blame] | 142 | tmp = ESP_SKB_CB(skb)->tmp; |
| 143 | esp_ssg_unref(x, tmp); |
| 144 | kfree(tmp); |
Steffen Klassert | f53c723 | 2017-12-20 10:41:36 +0100 | [diff] [blame] | 145 | |
| 146 | if (xo && (xo->flags & XFRM_DEV_RESUME)) { |
| 147 | if (err) { |
| 148 | XFRM_INC_STATS(xs_net(x), LINUX_MIB_XFRMOUTSTATEPROTOERROR); |
| 149 | kfree_skb(skb); |
| 150 | return; |
| 151 | } |
| 152 | |
| 153 | skb_push(skb, skb->data - skb_mac_header(skb)); |
| 154 | secpath_reset(skb); |
| 155 | xfrm_dev_resume(skb); |
| 156 | } else { |
| 157 | xfrm_output_resume(skb, err); |
| 158 | } |
Herbert Xu | 38320c7 | 2008-01-28 19:35:05 -0800 | [diff] [blame] | 159 | } |
| 160 | |
Herbert Xu | 000ae7b | 2015-05-27 16:03:47 +0800 | [diff] [blame] | 161 | /* Move ESP header back into place. */ |
| 162 | static void esp_restore_header(struct sk_buff *skb, unsigned int offset) |
| 163 | { |
| 164 | struct ip_esp_hdr *esph = (void *)(skb->data + offset); |
| 165 | void *tmp = ESP_SKB_CB(skb)->tmp; |
| 166 | __be32 *seqhi = esp_tmp_seqhi(tmp); |
| 167 | |
| 168 | esph->seq_no = esph->spi; |
| 169 | esph->spi = *seqhi; |
| 170 | } |
| 171 | |
| 172 | static void esp_output_restore_header(struct sk_buff *skb) |
| 173 | { |
| 174 | esp_restore_header(skb, skb_transport_offset(skb) - sizeof(__be32)); |
| 175 | } |
| 176 | |
Steffen Klassert | 03e2a30 | 2017-01-17 10:23:03 +0100 | [diff] [blame] | 177 | static struct ip_esp_hdr *esp_output_set_esn(struct sk_buff *skb, |
Steffen Klassert | 383d035 | 2017-04-14 10:06:42 +0200 | [diff] [blame] | 178 | struct xfrm_state *x, |
Steffen Klassert | 03e2a30 | 2017-01-17 10:23:03 +0100 | [diff] [blame] | 179 | struct ip_esp_hdr *esph, |
| 180 | __be32 *seqhi) |
| 181 | { |
Steffen Klassert | 03e2a30 | 2017-01-17 10:23:03 +0100 | [diff] [blame] | 182 | /* For ESN we move the header forward by 4 bytes to |
| 183 | * accomodate the high bits. We will move it back after |
| 184 | * encryption. |
| 185 | */ |
| 186 | if ((x->props.flags & XFRM_STATE_ESN)) { |
Steffen Klassert | 7862b40 | 2017-04-14 10:06:50 +0200 | [diff] [blame] | 187 | struct xfrm_offload *xo = xfrm_offload(skb); |
| 188 | |
Steffen Klassert | 03e2a30 | 2017-01-17 10:23:03 +0100 | [diff] [blame] | 189 | esph = (void *)(skb_transport_header(skb) - sizeof(__be32)); |
| 190 | *seqhi = esph->spi; |
Steffen Klassert | 7862b40 | 2017-04-14 10:06:50 +0200 | [diff] [blame] | 191 | if (xo) |
| 192 | esph->seq_no = htonl(xo->seq.hi); |
| 193 | else |
| 194 | esph->seq_no = htonl(XFRM_SKB_CB(skb)->seq.output.hi); |
Steffen Klassert | 03e2a30 | 2017-01-17 10:23:03 +0100 | [diff] [blame] | 195 | } |
| 196 | |
| 197 | esph->spi = x->id.spi; |
| 198 | |
| 199 | return esph; |
| 200 | } |
| 201 | |
Herbert Xu | 000ae7b | 2015-05-27 16:03:47 +0800 | [diff] [blame] | 202 | static void esp_output_done_esn(struct crypto_async_request *base, int err) |
| 203 | { |
| 204 | struct sk_buff *skb = base->data; |
| 205 | |
| 206 | esp_output_restore_header(skb); |
| 207 | esp_output_done(base, err); |
| 208 | } |
| 209 | |
Steffen Klassert | eb758c8 | 2017-01-17 10:23:08 +0100 | [diff] [blame] | 210 | static void esp_output_fill_trailer(u8 *tail, int tfclen, int plen, __u8 proto) |
| 211 | { |
| 212 | /* Fill padding... */ |
| 213 | if (tfclen) { |
| 214 | memset(tail, 0, tfclen); |
| 215 | tail += tfclen; |
| 216 | } |
| 217 | do { |
| 218 | int i; |
| 219 | for (i = 0; i < plen - 2; i++) |
| 220 | tail[i] = i + 1; |
| 221 | } while (0); |
| 222 | tail[plen - 2] = plen - 2; |
| 223 | tail[plen - 1] = proto; |
| 224 | } |
| 225 | |
Steffen Klassert | 383d035 | 2017-04-14 10:06:42 +0200 | [diff] [blame] | 226 | int esp6_output_head(struct xfrm_state *x, struct sk_buff *skb, struct esp_info *esp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 227 | { |
Arnaldo Carvalho de Melo | 27a884d | 2007-04-19 20:29:13 -0700 | [diff] [blame] | 228 | u8 *tail; |
Steffen Klassert | 03e2a30 | 2017-01-17 10:23:03 +0100 | [diff] [blame] | 229 | u8 *vaddr; |
Steffen Klassert | 383d035 | 2017-04-14 10:06:42 +0200 | [diff] [blame] | 230 | int nfrags; |
| 231 | struct page *page; |
Steffen Klassert | 383d035 | 2017-04-14 10:06:42 +0200 | [diff] [blame] | 232 | struct sk_buff *trailer; |
| 233 | int tailen = esp->tailen; |
Steffen Klassert | d212a4c | 2011-03-08 00:07:51 +0000 | [diff] [blame] | 234 | |
Steffen Klassert | 03e2a30 | 2017-01-17 10:23:03 +0100 | [diff] [blame] | 235 | if (!skb_cloned(skb)) { |
Steffen Klassert | 54ffd79 | 2017-08-25 07:34:35 +0200 | [diff] [blame] | 236 | if (tailen <= skb_tailroom(skb)) { |
Steffen Klassert | 03e2a30 | 2017-01-17 10:23:03 +0100 | [diff] [blame] | 237 | nfrags = 1; |
| 238 | trailer = skb; |
| 239 | tail = skb_tail_pointer(trailer); |
| 240 | |
| 241 | goto skip_cow; |
| 242 | } else if ((skb_shinfo(skb)->nr_frags < MAX_SKB_FRAGS) |
| 243 | && !skb_has_frag_list(skb)) { |
| 244 | int allocsize; |
| 245 | struct sock *sk = skb->sk; |
| 246 | struct page_frag *pfrag = &x->xfrag; |
| 247 | |
Steffen Klassert | 383d035 | 2017-04-14 10:06:42 +0200 | [diff] [blame] | 248 | esp->inplace = false; |
| 249 | |
Steffen Klassert | 03e2a30 | 2017-01-17 10:23:03 +0100 | [diff] [blame] | 250 | allocsize = ALIGN(tailen, L1_CACHE_BYTES); |
| 251 | |
| 252 | spin_lock_bh(&x->lock); |
| 253 | |
| 254 | if (unlikely(!skb_page_frag_refill(allocsize, pfrag, GFP_ATOMIC))) { |
| 255 | spin_unlock_bh(&x->lock); |
| 256 | goto cow; |
| 257 | } |
| 258 | |
| 259 | page = pfrag->page; |
| 260 | get_page(page); |
| 261 | |
| 262 | vaddr = kmap_atomic(page); |
| 263 | |
| 264 | tail = vaddr + pfrag->offset; |
| 265 | |
Steffen Klassert | 383d035 | 2017-04-14 10:06:42 +0200 | [diff] [blame] | 266 | esp_output_fill_trailer(tail, esp->tfclen, esp->plen, esp->proto); |
Steffen Klassert | 03e2a30 | 2017-01-17 10:23:03 +0100 | [diff] [blame] | 267 | |
| 268 | kunmap_atomic(vaddr); |
| 269 | |
| 270 | nfrags = skb_shinfo(skb)->nr_frags; |
| 271 | |
| 272 | __skb_fill_page_desc(skb, nfrags, page, pfrag->offset, |
| 273 | tailen); |
| 274 | skb_shinfo(skb)->nr_frags = ++nfrags; |
| 275 | |
| 276 | pfrag->offset = pfrag->offset + allocsize; |
Steffen Klassert | 36ff0dd | 2017-08-25 07:16:07 +0200 | [diff] [blame] | 277 | |
| 278 | spin_unlock_bh(&x->lock); |
| 279 | |
Steffen Klassert | 03e2a30 | 2017-01-17 10:23:03 +0100 | [diff] [blame] | 280 | nfrags++; |
| 281 | |
| 282 | skb->len += tailen; |
| 283 | skb->data_len += tailen; |
| 284 | skb->truesize += tailen; |
Martin Willi | 09db512 | 2019-01-28 09:35:35 +0100 | [diff] [blame] | 285 | if (sk && sk_fullsock(sk)) |
Reshetova, Elena | 14afee4 | 2017-06-30 13:08:00 +0300 | [diff] [blame] | 286 | refcount_add(tailen, &sk->sk_wmem_alloc); |
Steffen Klassert | 03e2a30 | 2017-01-17 10:23:03 +0100 | [diff] [blame] | 287 | |
Steffen Klassert | 383d035 | 2017-04-14 10:06:42 +0200 | [diff] [blame] | 288 | goto out; |
Steffen Klassert | 03e2a30 | 2017-01-17 10:23:03 +0100 | [diff] [blame] | 289 | } |
| 290 | } |
| 291 | |
| 292 | cow: |
Steffen Klassert | 383d035 | 2017-04-14 10:06:42 +0200 | [diff] [blame] | 293 | nfrags = skb_cow_data(skb, tailen, &trailer); |
| 294 | if (nfrags < 0) |
| 295 | goto out; |
Steffen Klassert | 03e2a30 | 2017-01-17 10:23:03 +0100 | [diff] [blame] | 296 | tail = skb_tail_pointer(trailer); |
Steffen Klassert | 03e2a30 | 2017-01-17 10:23:03 +0100 | [diff] [blame] | 297 | |
| 298 | skip_cow: |
Steffen Klassert | 383d035 | 2017-04-14 10:06:42 +0200 | [diff] [blame] | 299 | esp_output_fill_trailer(tail, esp->tfclen, esp->plen, esp->proto); |
| 300 | pskb_put(skb, trailer, tailen); |
Steffen Klassert | 03e2a30 | 2017-01-17 10:23:03 +0100 | [diff] [blame] | 301 | |
Steffen Klassert | 383d035 | 2017-04-14 10:06:42 +0200 | [diff] [blame] | 302 | out: |
| 303 | return nfrags; |
| 304 | } |
| 305 | EXPORT_SYMBOL_GPL(esp6_output_head); |
Steffen Klassert | 03e2a30 | 2017-01-17 10:23:03 +0100 | [diff] [blame] | 306 | |
Steffen Klassert | 383d035 | 2017-04-14 10:06:42 +0200 | [diff] [blame] | 307 | int esp6_output_tail(struct xfrm_state *x, struct sk_buff *skb, struct esp_info *esp) |
| 308 | { |
| 309 | u8 *iv; |
| 310 | int alen; |
| 311 | void *tmp; |
| 312 | int ivlen; |
| 313 | int assoclen; |
| 314 | int seqhilen; |
| 315 | __be32 *seqhi; |
| 316 | struct page *page; |
| 317 | struct ip_esp_hdr *esph; |
| 318 | struct aead_request *req; |
| 319 | struct crypto_aead *aead; |
| 320 | struct scatterlist *sg, *dsg; |
| 321 | int err = -ENOMEM; |
Steffen Klassert | 03e2a30 | 2017-01-17 10:23:03 +0100 | [diff] [blame] | 322 | |
Steffen Klassert | 383d035 | 2017-04-14 10:06:42 +0200 | [diff] [blame] | 323 | assoclen = sizeof(struct ip_esp_hdr); |
| 324 | seqhilen = 0; |
| 325 | |
| 326 | if (x->props.flags & XFRM_STATE_ESN) { |
| 327 | seqhilen += sizeof(__be32); |
| 328 | assoclen += sizeof(__be32); |
| 329 | } |
| 330 | |
| 331 | aead = x->data; |
| 332 | alen = crypto_aead_authsize(aead); |
| 333 | ivlen = crypto_aead_ivsize(aead); |
| 334 | |
| 335 | tmp = esp_alloc_tmp(aead, esp->nfrags + 2, seqhilen); |
Steffen Klassert | e892d2d | 2017-04-24 07:33:56 +0200 | [diff] [blame] | 336 | if (!tmp) |
Herbert Xu | 38320c7 | 2008-01-28 19:35:05 -0800 | [diff] [blame] | 337 | goto error; |
| 338 | |
Steffen Klassert | d212a4c | 2011-03-08 00:07:51 +0000 | [diff] [blame] | 339 | seqhi = esp_tmp_seqhi(tmp); |
| 340 | iv = esp_tmp_iv(aead, tmp, seqhilen); |
Herbert Xu | 000ae7b | 2015-05-27 16:03:47 +0800 | [diff] [blame] | 341 | req = esp_tmp_req(aead, iv); |
| 342 | sg = esp_req_sg(aead, req); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 343 | |
Steffen Klassert | 383d035 | 2017-04-14 10:06:42 +0200 | [diff] [blame] | 344 | if (esp->inplace) |
| 345 | dsg = sg; |
| 346 | else |
| 347 | dsg = &sg[esp->nfrags]; |
Herbert Xu | 000ae7b | 2015-05-27 16:03:47 +0800 | [diff] [blame] | 348 | |
Steffen Klassert | 383d035 | 2017-04-14 10:06:42 +0200 | [diff] [blame] | 349 | esph = esp_output_set_esn(skb, x, ip_esp_hdr(skb), seqhi); |
| 350 | |
| 351 | sg_init_table(sg, esp->nfrags); |
Jason A. Donenfeld | 3f29770 | 2017-06-04 04:16:23 +0200 | [diff] [blame] | 352 | err = skb_to_sgvec(skb, sg, |
| 353 | (unsigned char *)esph - skb->data, |
| 354 | assoclen + ivlen + esp->clen + alen); |
| 355 | if (unlikely(err < 0)) |
Steffen Klassert | e619492 | 2017-07-13 09:13:30 +0200 | [diff] [blame] | 356 | goto error_free; |
Steffen Klassert | d212a4c | 2011-03-08 00:07:51 +0000 | [diff] [blame] | 357 | |
Steffen Klassert | 383d035 | 2017-04-14 10:06:42 +0200 | [diff] [blame] | 358 | if (!esp->inplace) { |
| 359 | int allocsize; |
| 360 | struct page_frag *pfrag = &x->xfrag; |
| 361 | |
| 362 | allocsize = ALIGN(skb->data_len, L1_CACHE_BYTES); |
| 363 | |
| 364 | spin_lock_bh(&x->lock); |
| 365 | if (unlikely(!skb_page_frag_refill(allocsize, pfrag, GFP_ATOMIC))) { |
| 366 | spin_unlock_bh(&x->lock); |
Steffen Klassert | e619492 | 2017-07-13 09:13:30 +0200 | [diff] [blame] | 367 | goto error_free; |
Steffen Klassert | 383d035 | 2017-04-14 10:06:42 +0200 | [diff] [blame] | 368 | } |
| 369 | |
| 370 | skb_shinfo(skb)->nr_frags = 1; |
| 371 | |
| 372 | page = pfrag->page; |
| 373 | get_page(page); |
| 374 | /* replace page frags in skb with new page */ |
| 375 | __skb_fill_page_desc(skb, 0, page, pfrag->offset, skb->data_len); |
| 376 | pfrag->offset = pfrag->offset + allocsize; |
| 377 | spin_unlock_bh(&x->lock); |
| 378 | |
| 379 | sg_init_table(dsg, skb_shinfo(skb)->nr_frags + 1); |
Jason A. Donenfeld | 3f29770 | 2017-06-04 04:16:23 +0200 | [diff] [blame] | 380 | err = skb_to_sgvec(skb, dsg, |
| 381 | (unsigned char *)esph - skb->data, |
| 382 | assoclen + ivlen + esp->clen + alen); |
| 383 | if (unlikely(err < 0)) |
Steffen Klassert | e619492 | 2017-07-13 09:13:30 +0200 | [diff] [blame] | 384 | goto error_free; |
Steffen Klassert | 383d035 | 2017-04-14 10:06:42 +0200 | [diff] [blame] | 385 | } |
| 386 | |
Steffen Klassert | 03e2a30 | 2017-01-17 10:23:03 +0100 | [diff] [blame] | 387 | if ((x->props.flags & XFRM_STATE_ESN)) |
| 388 | aead_request_set_callback(req, 0, esp_output_done_esn, skb); |
| 389 | else |
| 390 | aead_request_set_callback(req, 0, esp_output_done, skb); |
| 391 | |
Steffen Klassert | 383d035 | 2017-04-14 10:06:42 +0200 | [diff] [blame] | 392 | aead_request_set_crypt(req, sg, dsg, ivlen + esp->clen, iv); |
Herbert Xu | 000ae7b | 2015-05-27 16:03:47 +0800 | [diff] [blame] | 393 | aead_request_set_ad(req, assoclen); |
Herbert Xu | b7c6538c | 2007-10-09 13:33:35 -0700 | [diff] [blame] | 394 | |
Herbert Xu | 000ae7b | 2015-05-27 16:03:47 +0800 | [diff] [blame] | 395 | memset(iv, 0, ivlen); |
Steffen Klassert | 383d035 | 2017-04-14 10:06:42 +0200 | [diff] [blame] | 396 | memcpy(iv + ivlen - min(ivlen, 8), (u8 *)&esp->seqno + 8 - min(ivlen, 8), |
Herbert Xu | 000ae7b | 2015-05-27 16:03:47 +0800 | [diff] [blame] | 397 | min(ivlen, 8)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 398 | |
Herbert Xu | 38320c7 | 2008-01-28 19:35:05 -0800 | [diff] [blame] | 399 | ESP_SKB_CB(skb)->tmp = tmp; |
Herbert Xu | 000ae7b | 2015-05-27 16:03:47 +0800 | [diff] [blame] | 400 | err = crypto_aead_encrypt(req); |
| 401 | |
| 402 | switch (err) { |
| 403 | case -EINPROGRESS: |
Herbert Xu | 38320c7 | 2008-01-28 19:35:05 -0800 | [diff] [blame] | 404 | goto error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 405 | |
Gilad Ben-Yossef | 068c2e7 | 2017-10-18 08:00:35 +0100 | [diff] [blame] | 406 | case -ENOSPC: |
Herbert Xu | 38320c7 | 2008-01-28 19:35:05 -0800 | [diff] [blame] | 407 | err = NET_XMIT_DROP; |
Herbert Xu | 000ae7b | 2015-05-27 16:03:47 +0800 | [diff] [blame] | 408 | break; |
| 409 | |
| 410 | case 0: |
| 411 | if ((x->props.flags & XFRM_STATE_ESN)) |
| 412 | esp_output_restore_header(skb); |
| 413 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 414 | |
Steffen Klassert | 03e2a30 | 2017-01-17 10:23:03 +0100 | [diff] [blame] | 415 | if (sg != dsg) |
| 416 | esp_ssg_unref(x, tmp); |
Herbert Xu | b7c6538c | 2007-10-09 13:33:35 -0700 | [diff] [blame] | 417 | |
Steffen Klassert | e619492 | 2017-07-13 09:13:30 +0200 | [diff] [blame] | 418 | error_free: |
| 419 | kfree(tmp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 420 | error: |
| 421 | return err; |
| 422 | } |
Steffen Klassert | 383d035 | 2017-04-14 10:06:42 +0200 | [diff] [blame] | 423 | EXPORT_SYMBOL_GPL(esp6_output_tail); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 424 | |
Steffen Klassert | 383d035 | 2017-04-14 10:06:42 +0200 | [diff] [blame] | 425 | static int esp6_output(struct xfrm_state *x, struct sk_buff *skb) |
| 426 | { |
| 427 | int alen; |
| 428 | int blksize; |
| 429 | struct ip_esp_hdr *esph; |
| 430 | struct crypto_aead *aead; |
| 431 | struct esp_info esp; |
| 432 | |
| 433 | esp.inplace = true; |
| 434 | |
| 435 | esp.proto = *skb_mac_header(skb); |
| 436 | *skb_mac_header(skb) = IPPROTO_ESP; |
| 437 | |
| 438 | /* skb is pure payload to encrypt */ |
| 439 | |
| 440 | aead = x->data; |
| 441 | alen = crypto_aead_authsize(aead); |
| 442 | |
| 443 | esp.tfclen = 0; |
| 444 | if (x->tfcpad) { |
| 445 | struct xfrm_dst *dst = (struct xfrm_dst *)skb_dst(skb); |
| 446 | u32 padto; |
| 447 | |
Florian Westphal | c7b37c7 | 2019-06-24 22:04:48 +0200 | [diff] [blame] | 448 | padto = min(x->tfcpad, xfrm_state_mtu(x, dst->child_mtu_cached)); |
Steffen Klassert | 383d035 | 2017-04-14 10:06:42 +0200 | [diff] [blame] | 449 | if (skb->len < padto) |
| 450 | esp.tfclen = padto - skb->len; |
| 451 | } |
| 452 | blksize = ALIGN(crypto_aead_blocksize(aead), 4); |
| 453 | esp.clen = ALIGN(skb->len + 2 + esp.tfclen, blksize); |
| 454 | esp.plen = esp.clen - skb->len - esp.tfclen; |
| 455 | esp.tailen = esp.tfclen + esp.plen + alen; |
| 456 | |
| 457 | esp.nfrags = esp6_output_head(x, skb, &esp); |
| 458 | if (esp.nfrags < 0) |
| 459 | return esp.nfrags; |
| 460 | |
| 461 | esph = ip_esp_hdr(skb); |
| 462 | esph->spi = x->id.spi; |
| 463 | |
| 464 | esph->seq_no = htonl(XFRM_SKB_CB(skb)->seq.output.low); |
| 465 | esp.seqno = cpu_to_be64(XFRM_SKB_CB(skb)->seq.output.low + |
| 466 | ((u64)XFRM_SKB_CB(skb)->seq.output.hi << 32)); |
| 467 | |
| 468 | skb_push(skb, -skb_network_offset(skb)); |
| 469 | |
| 470 | return esp6_output_tail(x, skb, &esp); |
| 471 | } |
| 472 | |
Yossi Kuperman | 47ebcc0 | 2017-08-30 11:30:39 +0300 | [diff] [blame] | 473 | static inline int esp_remove_trailer(struct sk_buff *skb) |
Herbert Xu | 38320c7 | 2008-01-28 19:35:05 -0800 | [diff] [blame] | 474 | { |
| 475 | struct xfrm_state *x = xfrm_input_state(skb); |
Steffen Klassert | d77e38e | 2017-04-14 10:06:10 +0200 | [diff] [blame] | 476 | struct xfrm_offload *xo = xfrm_offload(skb); |
Mathias Krause | 1c5ad13 | 2013-10-18 12:09:05 +0200 | [diff] [blame] | 477 | struct crypto_aead *aead = x->data; |
Yossi Kuperman | 47ebcc0 | 2017-08-30 11:30:39 +0300 | [diff] [blame] | 478 | int alen, hlen, elen; |
Ilan Tayari | e51a647 | 2017-08-01 12:49:05 +0300 | [diff] [blame] | 479 | int padlen, trimlen; |
| 480 | __wsum csumdiff; |
Herbert Xu | 38320c7 | 2008-01-28 19:35:05 -0800 | [diff] [blame] | 481 | u8 nexthdr[2]; |
Yossi Kuperman | 47ebcc0 | 2017-08-30 11:30:39 +0300 | [diff] [blame] | 482 | int ret; |
Herbert Xu | 38320c7 | 2008-01-28 19:35:05 -0800 | [diff] [blame] | 483 | |
Yossi Kuperman | 47ebcc0 | 2017-08-30 11:30:39 +0300 | [diff] [blame] | 484 | alen = crypto_aead_authsize(aead); |
| 485 | hlen = sizeof(struct ip_esp_hdr) + crypto_aead_ivsize(aead); |
| 486 | elen = skb->len - hlen; |
Herbert Xu | 38320c7 | 2008-01-28 19:35:05 -0800 | [diff] [blame] | 487 | |
Yossi Kuperman | 47ebcc0 | 2017-08-30 11:30:39 +0300 | [diff] [blame] | 488 | if (xo && (xo->flags & XFRM_ESP_NO_TRAILER)) { |
| 489 | ret = xo->proto; |
Herbert Xu | 38320c7 | 2008-01-28 19:35:05 -0800 | [diff] [blame] | 490 | goto out; |
Yossi Kuperman | 47ebcc0 | 2017-08-30 11:30:39 +0300 | [diff] [blame] | 491 | } |
Herbert Xu | 38320c7 | 2008-01-28 19:35:05 -0800 | [diff] [blame] | 492 | |
Gustavo A. R. Silva | eee12df | 2017-10-26 07:51:06 -0500 | [diff] [blame] | 493 | ret = skb_copy_bits(skb, skb->len - alen - 2, nexthdr, 2); |
| 494 | BUG_ON(ret); |
Herbert Xu | 38320c7 | 2008-01-28 19:35:05 -0800 | [diff] [blame] | 495 | |
Yossi Kuperman | 47ebcc0 | 2017-08-30 11:30:39 +0300 | [diff] [blame] | 496 | ret = -EINVAL; |
Herbert Xu | 38320c7 | 2008-01-28 19:35:05 -0800 | [diff] [blame] | 497 | padlen = nexthdr[0]; |
| 498 | if (padlen + 2 + alen >= elen) { |
Joe Perches | ba7a46f | 2014-11-11 10:59:17 -0800 | [diff] [blame] | 499 | net_dbg_ratelimited("ipsec esp packet is garbage padlen=%d, elen=%d\n", |
| 500 | padlen + 2, elen - alen); |
Herbert Xu | 38320c7 | 2008-01-28 19:35:05 -0800 | [diff] [blame] | 501 | goto out; |
| 502 | } |
| 503 | |
Ilan Tayari | e51a647 | 2017-08-01 12:49:05 +0300 | [diff] [blame] | 504 | trimlen = alen + padlen + 2; |
| 505 | if (skb->ip_summed == CHECKSUM_COMPLETE) { |
| 506 | csumdiff = skb_checksum(skb, skb->len - trimlen, trimlen, 0); |
| 507 | skb->csum = csum_block_sub(skb->csum, csumdiff, |
| 508 | skb->len - trimlen); |
| 509 | } |
| 510 | pskb_trim(skb, skb->len - trimlen); |
| 511 | |
Yossi Kuperman | 47ebcc0 | 2017-08-30 11:30:39 +0300 | [diff] [blame] | 512 | ret = nexthdr[1]; |
| 513 | |
| 514 | out: |
| 515 | return ret; |
| 516 | } |
| 517 | |
| 518 | int esp6_input_done2(struct sk_buff *skb, int err) |
| 519 | { |
| 520 | struct xfrm_state *x = xfrm_input_state(skb); |
| 521 | struct xfrm_offload *xo = xfrm_offload(skb); |
| 522 | struct crypto_aead *aead = x->data; |
| 523 | int hlen = sizeof(struct ip_esp_hdr) + crypto_aead_ivsize(aead); |
| 524 | int hdr_len = skb_network_header_len(skb); |
| 525 | |
| 526 | if (!xo || (xo && !(xo->flags & CRYPTO_DONE))) |
| 527 | kfree(ESP_SKB_CB(skb)->tmp); |
| 528 | |
| 529 | if (unlikely(err)) |
| 530 | goto out; |
| 531 | |
| 532 | err = esp_remove_trailer(skb); |
| 533 | if (unlikely(err < 0)) |
| 534 | goto out; |
| 535 | |
| 536 | skb_postpull_rcsum(skb, skb_network_header(skb), |
| 537 | skb_network_header_len(skb)); |
Ilan Tayari | e51a647 | 2017-08-01 12:49:05 +0300 | [diff] [blame] | 538 | skb_pull_rcsum(skb, hlen); |
Li RongQing | a9403f8 | 2013-01-08 15:41:12 +0800 | [diff] [blame] | 539 | if (x->props.mode == XFRM_MODE_TUNNEL) |
| 540 | skb_reset_transport_header(skb); |
| 541 | else |
| 542 | skb_set_transport_header(skb, -hdr_len); |
Herbert Xu | 38320c7 | 2008-01-28 19:35:05 -0800 | [diff] [blame] | 543 | |
Herbert Xu | 38320c7 | 2008-01-28 19:35:05 -0800 | [diff] [blame] | 544 | /* RFC4303: Drop dummy packets without any error */ |
| 545 | if (err == IPPROTO_NONE) |
| 546 | err = -EINVAL; |
| 547 | |
| 548 | out: |
| 549 | return err; |
| 550 | } |
Steffen Klassert | 383d035 | 2017-04-14 10:06:42 +0200 | [diff] [blame] | 551 | EXPORT_SYMBOL_GPL(esp6_input_done2); |
Herbert Xu | 38320c7 | 2008-01-28 19:35:05 -0800 | [diff] [blame] | 552 | |
| 553 | static void esp_input_done(struct crypto_async_request *base, int err) |
| 554 | { |
| 555 | struct sk_buff *skb = base->data; |
| 556 | |
Steffen Klassert | f1fbed0 | 2017-04-14 10:06:21 +0200 | [diff] [blame] | 557 | xfrm_input_resume(skb, esp6_input_done2(skb, err)); |
Herbert Xu | 38320c7 | 2008-01-28 19:35:05 -0800 | [diff] [blame] | 558 | } |
| 559 | |
Herbert Xu | 000ae7b | 2015-05-27 16:03:47 +0800 | [diff] [blame] | 560 | static void esp_input_restore_header(struct sk_buff *skb) |
| 561 | { |
| 562 | esp_restore_header(skb, 0); |
| 563 | __skb_pull(skb, 4); |
| 564 | } |
| 565 | |
Steffen Klassert | 03e2a30 | 2017-01-17 10:23:03 +0100 | [diff] [blame] | 566 | static void esp_input_set_header(struct sk_buff *skb, __be32 *seqhi) |
| 567 | { |
| 568 | struct xfrm_state *x = xfrm_input_state(skb); |
Steffen Klassert | 03e2a30 | 2017-01-17 10:23:03 +0100 | [diff] [blame] | 569 | |
| 570 | /* For ESN we move the header forward by 4 bytes to |
| 571 | * accomodate the high bits. We will move it back after |
| 572 | * decryption. |
| 573 | */ |
| 574 | if ((x->props.flags & XFRM_STATE_ESN)) { |
Colin Ian King | d3cc547 | 2017-10-19 15:09:47 +0200 | [diff] [blame] | 575 | struct ip_esp_hdr *esph = skb_push(skb, 4); |
| 576 | |
Steffen Klassert | 03e2a30 | 2017-01-17 10:23:03 +0100 | [diff] [blame] | 577 | *seqhi = esph->spi; |
| 578 | esph->spi = esph->seq_no; |
| 579 | esph->seq_no = XFRM_SKB_CB(skb)->seq.input.hi; |
| 580 | } |
| 581 | } |
| 582 | |
Herbert Xu | 000ae7b | 2015-05-27 16:03:47 +0800 | [diff] [blame] | 583 | static void esp_input_done_esn(struct crypto_async_request *base, int err) |
| 584 | { |
| 585 | struct sk_buff *skb = base->data; |
| 586 | |
| 587 | esp_input_restore_header(skb); |
| 588 | esp_input_done(base, err); |
| 589 | } |
| 590 | |
Herbert Xu | e695633 | 2006-04-01 00:52:46 -0800 | [diff] [blame] | 591 | static int esp6_input(struct xfrm_state *x, struct sk_buff *skb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 592 | { |
Mathias Krause | 1c5ad13 | 2013-10-18 12:09:05 +0200 | [diff] [blame] | 593 | struct crypto_aead *aead = x->data; |
Herbert Xu | 38320c7 | 2008-01-28 19:35:05 -0800 | [diff] [blame] | 594 | struct aead_request *req; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 595 | struct sk_buff *trailer; |
Herbert Xu | 000ae7b | 2015-05-27 16:03:47 +0800 | [diff] [blame] | 596 | int ivlen = crypto_aead_ivsize(aead); |
Haishuang Yan | 0c05f98 | 2018-08-17 15:51:00 +0800 | [diff] [blame] | 597 | int elen = skb->len - sizeof(struct ip_esp_hdr) - ivlen; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 598 | int nfrags; |
Steffen Klassert | d212a4c | 2011-03-08 00:07:51 +0000 | [diff] [blame] | 599 | int assoclen; |
Steffen Klassert | d212a4c | 2011-03-08 00:07:51 +0000 | [diff] [blame] | 600 | int seqhilen; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 601 | int ret = 0; |
Herbert Xu | 38320c7 | 2008-01-28 19:35:05 -0800 | [diff] [blame] | 602 | void *tmp; |
Steffen Klassert | d212a4c | 2011-03-08 00:07:51 +0000 | [diff] [blame] | 603 | __be32 *seqhi; |
Herbert Xu | 38320c7 | 2008-01-28 19:35:05 -0800 | [diff] [blame] | 604 | u8 *iv; |
| 605 | struct scatterlist *sg; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 606 | |
Haishuang Yan | 0c05f98 | 2018-08-17 15:51:00 +0800 | [diff] [blame] | 607 | if (!pskb_may_pull(skb, sizeof(struct ip_esp_hdr) + ivlen)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 608 | ret = -EINVAL; |
Herbert Xu | 31a4ab9 | 2006-05-27 23:06:13 -0700 | [diff] [blame] | 609 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 610 | } |
| 611 | |
Herbert Xu | 38320c7 | 2008-01-28 19:35:05 -0800 | [diff] [blame] | 612 | if (elen <= 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 613 | ret = -EINVAL; |
Herbert Xu | 31a4ab9 | 2006-05-27 23:06:13 -0700 | [diff] [blame] | 614 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 615 | } |
| 616 | |
Haishuang Yan | 0c05f98 | 2018-08-17 15:51:00 +0800 | [diff] [blame] | 617 | assoclen = sizeof(struct ip_esp_hdr); |
Steffen Klassert | d212a4c | 2011-03-08 00:07:51 +0000 | [diff] [blame] | 618 | seqhilen = 0; |
| 619 | |
| 620 | if (x->props.flags & XFRM_STATE_ESN) { |
Steffen Klassert | d212a4c | 2011-03-08 00:07:51 +0000 | [diff] [blame] | 621 | seqhilen += sizeof(__be32); |
| 622 | assoclen += seqhilen; |
| 623 | } |
| 624 | |
Steffen Klassert | 03e2a30 | 2017-01-17 10:23:03 +0100 | [diff] [blame] | 625 | if (!skb_cloned(skb)) { |
| 626 | if (!skb_is_nonlinear(skb)) { |
| 627 | nfrags = 1; |
| 628 | |
| 629 | goto skip_cow; |
| 630 | } else if (!skb_has_frag_list(skb)) { |
| 631 | nfrags = skb_shinfo(skb)->nr_frags; |
| 632 | nfrags++; |
| 633 | |
| 634 | goto skip_cow; |
| 635 | } |
| 636 | } |
| 637 | |
| 638 | nfrags = skb_cow_data(skb, 0, &trailer); |
| 639 | if (nfrags < 0) { |
| 640 | ret = -EINVAL; |
| 641 | goto out; |
| 642 | } |
| 643 | |
| 644 | skip_cow: |
| 645 | ret = -ENOMEM; |
Herbert Xu | 000ae7b | 2015-05-27 16:03:47 +0800 | [diff] [blame] | 646 | tmp = esp_alloc_tmp(aead, nfrags, seqhilen); |
Herbert Xu | 38320c7 | 2008-01-28 19:35:05 -0800 | [diff] [blame] | 647 | if (!tmp) |
Herbert Xu | 0ebea8e | 2007-11-13 21:45:58 -0800 | [diff] [blame] | 648 | goto out; |
| 649 | |
Herbert Xu | 38320c7 | 2008-01-28 19:35:05 -0800 | [diff] [blame] | 650 | ESP_SKB_CB(skb)->tmp = tmp; |
Steffen Klassert | d212a4c | 2011-03-08 00:07:51 +0000 | [diff] [blame] | 651 | seqhi = esp_tmp_seqhi(tmp); |
| 652 | iv = esp_tmp_iv(aead, tmp, seqhilen); |
Herbert Xu | 38320c7 | 2008-01-28 19:35:05 -0800 | [diff] [blame] | 653 | req = esp_tmp_req(aead, iv); |
Herbert Xu | 000ae7b | 2015-05-27 16:03:47 +0800 | [diff] [blame] | 654 | sg = esp_req_sg(aead, req); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 655 | |
Steffen Klassert | 03e2a30 | 2017-01-17 10:23:03 +0100 | [diff] [blame] | 656 | esp_input_set_header(skb, seqhi); |
Thomas Graf | 95a02cf | 2007-12-10 16:53:29 -0800 | [diff] [blame] | 657 | |
Herbert Xu | 38320c7 | 2008-01-28 19:35:05 -0800 | [diff] [blame] | 658 | sg_init_table(sg, nfrags); |
Jason A. Donenfeld | 3f29770 | 2017-06-04 04:16:23 +0200 | [diff] [blame] | 659 | ret = skb_to_sgvec(skb, sg, 0, skb->len); |
Zhen Lei | 7284fdf | 2018-06-27 11:49:28 +0800 | [diff] [blame] | 660 | if (unlikely(ret < 0)) { |
| 661 | kfree(tmp); |
Jason A. Donenfeld | 3f29770 | 2017-06-04 04:16:23 +0200 | [diff] [blame] | 662 | goto out; |
Zhen Lei | 7284fdf | 2018-06-27 11:49:28 +0800 | [diff] [blame] | 663 | } |
Steffen Klassert | d212a4c | 2011-03-08 00:07:51 +0000 | [diff] [blame] | 664 | |
Steffen Klassert | 03e2a30 | 2017-01-17 10:23:03 +0100 | [diff] [blame] | 665 | skb->ip_summed = CHECKSUM_NONE; |
| 666 | |
| 667 | if ((x->props.flags & XFRM_STATE_ESN)) |
| 668 | aead_request_set_callback(req, 0, esp_input_done_esn, skb); |
| 669 | else |
| 670 | aead_request_set_callback(req, 0, esp_input_done, skb); |
| 671 | |
Herbert Xu | 000ae7b | 2015-05-27 16:03:47 +0800 | [diff] [blame] | 672 | aead_request_set_crypt(req, sg, sg, elen + ivlen, iv); |
| 673 | aead_request_set_ad(req, assoclen); |
Herbert Xu | 38320c7 | 2008-01-28 19:35:05 -0800 | [diff] [blame] | 674 | |
| 675 | ret = crypto_aead_decrypt(req); |
| 676 | if (ret == -EINPROGRESS) |
| 677 | goto out; |
| 678 | |
Herbert Xu | 000ae7b | 2015-05-27 16:03:47 +0800 | [diff] [blame] | 679 | if ((x->props.flags & XFRM_STATE_ESN)) |
| 680 | esp_input_restore_header(skb); |
| 681 | |
Steffen Klassert | f1fbed0 | 2017-04-14 10:06:21 +0200 | [diff] [blame] | 682 | ret = esp6_input_done2(skb, ret); |
Herbert Xu | 38320c7 | 2008-01-28 19:35:05 -0800 | [diff] [blame] | 683 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 684 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 685 | return ret; |
| 686 | } |
| 687 | |
Steffen Klassert | d5860c5 | 2014-03-14 07:28:07 +0100 | [diff] [blame] | 688 | static int esp6_err(struct sk_buff *skb, struct inet6_skb_parm *opt, |
| 689 | u8 type, u8 code, int offset, __be32 info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 690 | { |
Alexey Dobriyan | 4fb236b | 2008-11-25 17:59:27 -0800 | [diff] [blame] | 691 | struct net *net = dev_net(skb->dev); |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 692 | const struct ipv6hdr *iph = (const struct ipv6hdr *)skb->data; |
Herbert Xu | 87bdc48 | 2007-10-10 15:45:25 -0700 | [diff] [blame] | 693 | struct ip_esp_hdr *esph = (struct ip_esp_hdr *)(skb->data + offset); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 694 | struct xfrm_state *x; |
| 695 | |
Steffen Klassert | b3b2b9e | 2013-09-10 13:43:09 +0200 | [diff] [blame] | 696 | if (type != ICMPV6_PKT_TOOBIG && |
David S. Miller | ec18d9a | 2012-07-12 00:25:15 -0700 | [diff] [blame] | 697 | type != NDISC_REDIRECT) |
Steffen Klassert | d5860c5 | 2014-03-14 07:28:07 +0100 | [diff] [blame] | 698 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 699 | |
Eric Dumazet | b71d1d4 | 2011-04-22 04:53:02 +0000 | [diff] [blame] | 700 | x = xfrm_state_lookup(net, skb->mark, (const xfrm_address_t *)&iph->daddr, |
| 701 | esph->spi, IPPROTO_ESP, AF_INET6); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 702 | if (!x) |
Steffen Klassert | d5860c5 | 2014-03-14 07:28:07 +0100 | [diff] [blame] | 703 | return 0; |
David S. Miller | ec18d9a | 2012-07-12 00:25:15 -0700 | [diff] [blame] | 704 | |
| 705 | if (type == NDISC_REDIRECT) |
Lorenzo Colitti | e2d118a | 2016-11-04 02:23:43 +0900 | [diff] [blame] | 706 | ip6_redirect(skb, net, skb->dev->ifindex, 0, |
| 707 | sock_net_uid(net, NULL)); |
David S. Miller | ec18d9a | 2012-07-12 00:25:15 -0700 | [diff] [blame] | 708 | else |
Lorenzo Colitti | e2d118a | 2016-11-04 02:23:43 +0900 | [diff] [blame] | 709 | ip6_update_pmtu(skb, net, info, 0, 0, sock_net_uid(net, NULL)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 710 | xfrm_state_put(x); |
Steffen Klassert | d5860c5 | 2014-03-14 07:28:07 +0100 | [diff] [blame] | 711 | |
| 712 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 713 | } |
| 714 | |
| 715 | static void esp6_destroy(struct xfrm_state *x) |
| 716 | { |
Mathias Krause | 1c5ad13 | 2013-10-18 12:09:05 +0200 | [diff] [blame] | 717 | struct crypto_aead *aead = x->data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 718 | |
Mathias Krause | 1c5ad13 | 2013-10-18 12:09:05 +0200 | [diff] [blame] | 719 | if (!aead) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 720 | return; |
| 721 | |
Mathias Krause | 1c5ad13 | 2013-10-18 12:09:05 +0200 | [diff] [blame] | 722 | crypto_free_aead(aead); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 723 | } |
| 724 | |
Herbert Xu | 1a6509d | 2008-01-28 19:37:29 -0800 | [diff] [blame] | 725 | static int esp_init_aead(struct xfrm_state *x) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 726 | { |
Herbert Xu | 000ae7b | 2015-05-27 16:03:47 +0800 | [diff] [blame] | 727 | char aead_name[CRYPTO_MAX_ALG_NAME]; |
Herbert Xu | 1a6509d | 2008-01-28 19:37:29 -0800 | [diff] [blame] | 728 | struct crypto_aead *aead; |
| 729 | int err; |
| 730 | |
Herbert Xu | 000ae7b | 2015-05-27 16:03:47 +0800 | [diff] [blame] | 731 | err = -ENAMETOOLONG; |
| 732 | if (snprintf(aead_name, CRYPTO_MAX_ALG_NAME, "%s(%s)", |
| 733 | x->geniv, x->aead->alg_name) >= CRYPTO_MAX_ALG_NAME) |
| 734 | goto error; |
| 735 | |
Steffen Klassert | f58869c | 2017-12-20 10:41:53 +0100 | [diff] [blame] | 736 | aead = crypto_alloc_aead(aead_name, 0, 0); |
Herbert Xu | 1a6509d | 2008-01-28 19:37:29 -0800 | [diff] [blame] | 737 | err = PTR_ERR(aead); |
| 738 | if (IS_ERR(aead)) |
| 739 | goto error; |
| 740 | |
Mathias Krause | 1c5ad13 | 2013-10-18 12:09:05 +0200 | [diff] [blame] | 741 | x->data = aead; |
Herbert Xu | 1a6509d | 2008-01-28 19:37:29 -0800 | [diff] [blame] | 742 | |
| 743 | err = crypto_aead_setkey(aead, x->aead->alg_key, |
| 744 | (x->aead->alg_key_len + 7) / 8); |
| 745 | if (err) |
| 746 | goto error; |
| 747 | |
| 748 | err = crypto_aead_setauthsize(aead, x->aead->alg_icv_len / 8); |
| 749 | if (err) |
| 750 | goto error; |
| 751 | |
| 752 | error: |
| 753 | return err; |
| 754 | } |
| 755 | |
| 756 | static int esp_init_authenc(struct xfrm_state *x) |
| 757 | { |
Herbert Xu | 38320c7 | 2008-01-28 19:35:05 -0800 | [diff] [blame] | 758 | struct crypto_aead *aead; |
| 759 | struct crypto_authenc_key_param *param; |
| 760 | struct rtattr *rta; |
| 761 | char *key; |
| 762 | char *p; |
| 763 | char authenc_name[CRYPTO_MAX_ALG_NAME]; |
Herbert Xu | 38320c7 | 2008-01-28 19:35:05 -0800 | [diff] [blame] | 764 | unsigned int keylen; |
| 765 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 766 | |
Herbert Xu | 1a6509d | 2008-01-28 19:37:29 -0800 | [diff] [blame] | 767 | err = -EINVAL; |
Ian Morris | 63159f2 | 2015-03-29 14:00:04 +0100 | [diff] [blame] | 768 | if (!x->ealg) |
Herbert Xu | 1a6509d | 2008-01-28 19:37:29 -0800 | [diff] [blame] | 769 | goto error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 770 | |
Herbert Xu | 1a6509d | 2008-01-28 19:37:29 -0800 | [diff] [blame] | 771 | err = -ENAMETOOLONG; |
Steffen Klassert | d212a4c | 2011-03-08 00:07:51 +0000 | [diff] [blame] | 772 | |
| 773 | if ((x->props.flags & XFRM_STATE_ESN)) { |
| 774 | if (snprintf(authenc_name, CRYPTO_MAX_ALG_NAME, |
Herbert Xu | 000ae7b | 2015-05-27 16:03:47 +0800 | [diff] [blame] | 775 | "%s%sauthencesn(%s,%s)%s", |
| 776 | x->geniv ?: "", x->geniv ? "(" : "", |
Steffen Klassert | d212a4c | 2011-03-08 00:07:51 +0000 | [diff] [blame] | 777 | x->aalg ? x->aalg->alg_name : "digest_null", |
Herbert Xu | 000ae7b | 2015-05-27 16:03:47 +0800 | [diff] [blame] | 778 | x->ealg->alg_name, |
| 779 | x->geniv ? ")" : "") >= CRYPTO_MAX_ALG_NAME) |
Steffen Klassert | d212a4c | 2011-03-08 00:07:51 +0000 | [diff] [blame] | 780 | goto error; |
| 781 | } else { |
| 782 | if (snprintf(authenc_name, CRYPTO_MAX_ALG_NAME, |
Herbert Xu | 000ae7b | 2015-05-27 16:03:47 +0800 | [diff] [blame] | 783 | "%s%sauthenc(%s,%s)%s", |
| 784 | x->geniv ?: "", x->geniv ? "(" : "", |
Steffen Klassert | d212a4c | 2011-03-08 00:07:51 +0000 | [diff] [blame] | 785 | x->aalg ? x->aalg->alg_name : "digest_null", |
Herbert Xu | 000ae7b | 2015-05-27 16:03:47 +0800 | [diff] [blame] | 786 | x->ealg->alg_name, |
| 787 | x->geniv ? ")" : "") >= CRYPTO_MAX_ALG_NAME) |
Steffen Klassert | d212a4c | 2011-03-08 00:07:51 +0000 | [diff] [blame] | 788 | goto error; |
| 789 | } |
Herbert Xu | 38320c7 | 2008-01-28 19:35:05 -0800 | [diff] [blame] | 790 | |
Steffen Klassert | f58869c | 2017-12-20 10:41:53 +0100 | [diff] [blame] | 791 | aead = crypto_alloc_aead(authenc_name, 0, 0); |
Herbert Xu | 38320c7 | 2008-01-28 19:35:05 -0800 | [diff] [blame] | 792 | err = PTR_ERR(aead); |
| 793 | if (IS_ERR(aead)) |
| 794 | goto error; |
| 795 | |
Mathias Krause | 1c5ad13 | 2013-10-18 12:09:05 +0200 | [diff] [blame] | 796 | x->data = aead; |
Herbert Xu | 38320c7 | 2008-01-28 19:35:05 -0800 | [diff] [blame] | 797 | |
| 798 | keylen = (x->aalg ? (x->aalg->alg_key_len + 7) / 8 : 0) + |
| 799 | (x->ealg->alg_key_len + 7) / 8 + RTA_SPACE(sizeof(*param)); |
| 800 | err = -ENOMEM; |
| 801 | key = kmalloc(keylen, GFP_KERNEL); |
| 802 | if (!key) |
| 803 | goto error; |
| 804 | |
| 805 | p = key; |
| 806 | rta = (void *)p; |
| 807 | rta->rta_type = CRYPTO_AUTHENC_KEYA_PARAM; |
| 808 | rta->rta_len = RTA_LENGTH(sizeof(*param)); |
| 809 | param = RTA_DATA(rta); |
| 810 | p += RTA_SPACE(sizeof(*param)); |
| 811 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 812 | if (x->aalg) { |
| 813 | struct xfrm_algo_desc *aalg_desc; |
| 814 | |
Herbert Xu | 38320c7 | 2008-01-28 19:35:05 -0800 | [diff] [blame] | 815 | memcpy(p, x->aalg->alg_key, (x->aalg->alg_key_len + 7) / 8); |
| 816 | p += (x->aalg->alg_key_len + 7) / 8; |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 817 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 818 | aalg_desc = xfrm_aalg_get_byname(x->aalg->alg_name, 0); |
| 819 | BUG_ON(!aalg_desc); |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 820 | |
Herbert Xu | 38320c7 | 2008-01-28 19:35:05 -0800 | [diff] [blame] | 821 | err = -EINVAL; |
Joe Perches | 4508349 | 2014-11-05 15:36:08 -0800 | [diff] [blame] | 822 | if (aalg_desc->uinfo.auth.icv_fullbits / 8 != |
Herbert Xu | 38320c7 | 2008-01-28 19:35:05 -0800 | [diff] [blame] | 823 | crypto_aead_authsize(aead)) { |
Joe Perches | 4508349 | 2014-11-05 15:36:08 -0800 | [diff] [blame] | 824 | pr_info("ESP: %s digestsize %u != %hu\n", |
| 825 | x->aalg->alg_name, |
| 826 | crypto_aead_authsize(aead), |
| 827 | aalg_desc->uinfo.auth.icv_fullbits / 8); |
Herbert Xu | 38320c7 | 2008-01-28 19:35:05 -0800 | [diff] [blame] | 828 | goto free_key; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 829 | } |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 830 | |
Herbert Xu | 38320c7 | 2008-01-28 19:35:05 -0800 | [diff] [blame] | 831 | err = crypto_aead_setauthsize( |
Martin Willi | 8f8a088 | 2009-11-25 00:29:53 +0000 | [diff] [blame] | 832 | aead, x->aalg->alg_trunc_len / 8); |
Herbert Xu | 38320c7 | 2008-01-28 19:35:05 -0800 | [diff] [blame] | 833 | if (err) |
| 834 | goto free_key; |
| 835 | } |
YOSHIFUJI Hideaki | 1ab1457 | 2007-02-09 23:24:49 +0900 | [diff] [blame] | 836 | |
Herbert Xu | 38320c7 | 2008-01-28 19:35:05 -0800 | [diff] [blame] | 837 | param->enckeylen = cpu_to_be32((x->ealg->alg_key_len + 7) / 8); |
| 838 | memcpy(p, x->ealg->alg_key, (x->ealg->alg_key_len + 7) / 8); |
| 839 | |
| 840 | err = crypto_aead_setkey(aead, key, keylen); |
| 841 | |
| 842 | free_key: |
| 843 | kfree(key); |
| 844 | |
Herbert Xu | 1a6509d | 2008-01-28 19:37:29 -0800 | [diff] [blame] | 845 | error: |
| 846 | return err; |
| 847 | } |
| 848 | |
| 849 | static int esp6_init_state(struct xfrm_state *x) |
| 850 | { |
Herbert Xu | 1a6509d | 2008-01-28 19:37:29 -0800 | [diff] [blame] | 851 | struct crypto_aead *aead; |
| 852 | u32 align; |
| 853 | int err; |
| 854 | |
| 855 | if (x->encap) |
| 856 | return -EINVAL; |
| 857 | |
Mathias Krause | 1c5ad13 | 2013-10-18 12:09:05 +0200 | [diff] [blame] | 858 | x->data = NULL; |
Herbert Xu | 1a6509d | 2008-01-28 19:37:29 -0800 | [diff] [blame] | 859 | |
| 860 | if (x->aead) |
| 861 | err = esp_init_aead(x); |
| 862 | else |
| 863 | err = esp_init_authenc(x); |
| 864 | |
Herbert Xu | 38320c7 | 2008-01-28 19:35:05 -0800 | [diff] [blame] | 865 | if (err) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 866 | goto error; |
Herbert Xu | 38320c7 | 2008-01-28 19:35:05 -0800 | [diff] [blame] | 867 | |
Mathias Krause | 1c5ad13 | 2013-10-18 12:09:05 +0200 | [diff] [blame] | 868 | aead = x->data; |
Herbert Xu | 1a6509d | 2008-01-28 19:37:29 -0800 | [diff] [blame] | 869 | |
Herbert Xu | 38320c7 | 2008-01-28 19:35:05 -0800 | [diff] [blame] | 870 | x->props.header_len = sizeof(struct ip_esp_hdr) + |
| 871 | crypto_aead_ivsize(aead); |
Herbert Xu | ca68145 | 2007-10-17 21:35:15 -0700 | [diff] [blame] | 872 | switch (x->props.mode) { |
| 873 | case XFRM_MODE_BEET: |
Joakim Koskela | abf5cdb | 2008-08-06 02:40:25 -0700 | [diff] [blame] | 874 | if (x->sel.family != AF_INET6) |
| 875 | x->props.header_len += IPV4_BEET_PHMAXLEN + |
Ian Morris | 67ba415 | 2014-08-24 21:53:10 +0100 | [diff] [blame] | 876 | (sizeof(struct ipv6hdr) - sizeof(struct iphdr)); |
Joakim Koskela | abf5cdb | 2008-08-06 02:40:25 -0700 | [diff] [blame] | 877 | break; |
Herbert Xu | bcfd09f | 2018-01-05 22:12:32 +1100 | [diff] [blame] | 878 | default: |
Herbert Xu | ca68145 | 2007-10-17 21:35:15 -0700 | [diff] [blame] | 879 | case XFRM_MODE_TRANSPORT: |
| 880 | break; |
| 881 | case XFRM_MODE_TUNNEL: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 882 | x->props.header_len += sizeof(struct ipv6hdr); |
Masahide NAKAMURA | ea2c47b | 2007-10-22 02:30:15 -0700 | [diff] [blame] | 883 | break; |
Herbert Xu | ca68145 | 2007-10-17 21:35:15 -0700 | [diff] [blame] | 884 | } |
Herbert Xu | 38320c7 | 2008-01-28 19:35:05 -0800 | [diff] [blame] | 885 | |
| 886 | align = ALIGN(crypto_aead_blocksize(aead), 4); |
Mathias Krause | 1c5ad13 | 2013-10-18 12:09:05 +0200 | [diff] [blame] | 887 | x->props.trailer_len = align + 1 + crypto_aead_authsize(aead); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 888 | |
| 889 | error: |
Herbert Xu | 38320c7 | 2008-01-28 19:35:05 -0800 | [diff] [blame] | 890 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 891 | } |
| 892 | |
Steffen Klassert | d5860c5 | 2014-03-14 07:28:07 +0100 | [diff] [blame] | 893 | static int esp6_rcv_cb(struct sk_buff *skb, int err) |
| 894 | { |
| 895 | return 0; |
| 896 | } |
| 897 | |
Ian Morris | cc24bec | 2014-08-24 21:53:11 +0100 | [diff] [blame] | 898 | static const struct xfrm_type esp6_type = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 899 | .description = "ESP6", |
Ian Morris | cc24bec | 2014-08-24 21:53:11 +0100 | [diff] [blame] | 900 | .owner = THIS_MODULE, |
| 901 | .proto = IPPROTO_ESP, |
Herbert Xu | 436a0a4 | 2007-10-08 17:25:53 -0700 | [diff] [blame] | 902 | .flags = XFRM_TYPE_REPLAY_PROT, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 903 | .init_state = esp6_init_state, |
| 904 | .destructor = esp6_destroy, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 905 | .input = esp6_input, |
Masahide NAKAMURA | aee5adb | 2006-08-23 17:57:28 -0700 | [diff] [blame] | 906 | .output = esp6_output, |
| 907 | .hdr_offset = xfrm6_find_1stfragopt, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 908 | }; |
| 909 | |
Steffen Klassert | d5860c5 | 2014-03-14 07:28:07 +0100 | [diff] [blame] | 910 | static struct xfrm6_protocol esp6_protocol = { |
| 911 | .handler = xfrm6_rcv, |
| 912 | .cb_handler = esp6_rcv_cb, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 913 | .err_handler = esp6_err, |
Steffen Klassert | d5860c5 | 2014-03-14 07:28:07 +0100 | [diff] [blame] | 914 | .priority = 0, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 915 | }; |
| 916 | |
| 917 | static int __init esp6_init(void) |
| 918 | { |
| 919 | if (xfrm_register_type(&esp6_type, AF_INET6) < 0) { |
Joe Perches | f321383 | 2012-05-15 14:11:53 +0000 | [diff] [blame] | 920 | pr_info("%s: can't add xfrm type\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 921 | return -EAGAIN; |
| 922 | } |
Steffen Klassert | d5860c5 | 2014-03-14 07:28:07 +0100 | [diff] [blame] | 923 | if (xfrm6_protocol_register(&esp6_protocol, IPPROTO_ESP) < 0) { |
Joe Perches | f321383 | 2012-05-15 14:11:53 +0000 | [diff] [blame] | 924 | pr_info("%s: can't add protocol\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 925 | xfrm_unregister_type(&esp6_type, AF_INET6); |
| 926 | return -EAGAIN; |
| 927 | } |
| 928 | |
| 929 | return 0; |
| 930 | } |
| 931 | |
| 932 | static void __exit esp6_fini(void) |
| 933 | { |
Steffen Klassert | d5860c5 | 2014-03-14 07:28:07 +0100 | [diff] [blame] | 934 | if (xfrm6_protocol_deregister(&esp6_protocol, IPPROTO_ESP) < 0) |
Joe Perches | f321383 | 2012-05-15 14:11:53 +0000 | [diff] [blame] | 935 | pr_info("%s: can't remove protocol\n", __func__); |
Florian Westphal | 4f518e8 | 2019-05-03 17:46:19 +0200 | [diff] [blame] | 936 | xfrm_unregister_type(&esp6_type, AF_INET6); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 937 | } |
| 938 | |
| 939 | module_init(esp6_init); |
| 940 | module_exit(esp6_fini); |
| 941 | |
| 942 | MODULE_LICENSE("GPL"); |
Masahide NAKAMURA | d3d6dd3 | 2007-06-26 23:57:49 -0700 | [diff] [blame] | 943 | MODULE_ALIAS_XFRM_TYPE(AF_INET6, XFRM_PROTO_ESP); |