Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (C)2003,2004 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, write to the Free Software |
| 16 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 17 | * |
| 18 | * Authors Mitsuru KANDA <mk@linux-ipv6.org> |
| 19 | * YOSHIFUJI Hideaki <yoshfuji@linux-ipv6.org> |
| 20 | * |
| 21 | * Based on net/ipv4/xfrm4_tunnel.c |
| 22 | * |
| 23 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | #include <linux/module.h> |
| 25 | #include <linux/xfrm.h> |
| 26 | #include <linux/list.h> |
| 27 | #include <net/ip.h> |
| 28 | #include <net/xfrm.h> |
| 29 | #include <net/ipv6.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | #include <linux/ipv6.h> |
| 31 | #include <linux/icmpv6.h> |
Arjan van de Ven | 4a3e2f7 | 2006-03-20 22:33:17 -0800 | [diff] [blame] | 32 | #include <linux/mutex.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | |
| 34 | #ifdef CONFIG_IPV6_XFRM6_TUNNEL_DEBUG |
| 35 | # define X6TDEBUG 3 |
| 36 | #else |
| 37 | # define X6TDEBUG 1 |
| 38 | #endif |
| 39 | |
| 40 | #define X6TPRINTK(fmt, args...) printk(fmt, ## args) |
| 41 | #define X6TNOPRINTK(fmt, args...) do { ; } while(0) |
| 42 | |
| 43 | #if X6TDEBUG >= 1 |
| 44 | # define X6TPRINTK1 X6TPRINTK |
| 45 | #else |
| 46 | # define X6TPRINTK1 X6TNOPRINTK |
| 47 | #endif |
| 48 | |
| 49 | #if X6TDEBUG >= 3 |
| 50 | # define X6TPRINTK3 X6TPRINTK |
| 51 | #else |
| 52 | # define X6TPRINTK3 X6TNOPRINTK |
| 53 | #endif |
| 54 | |
| 55 | /* |
| 56 | * xfrm_tunnel_spi things are for allocating unique id ("spi") |
| 57 | * per xfrm_address_t. |
| 58 | */ |
| 59 | struct xfrm6_tunnel_spi { |
| 60 | struct hlist_node list_byaddr; |
| 61 | struct hlist_node list_byspi; |
| 62 | xfrm_address_t addr; |
| 63 | u32 spi; |
| 64 | atomic_t refcnt; |
| 65 | #ifdef XFRM6_TUNNEL_SPI_MAGIC |
| 66 | u32 magic; |
| 67 | #endif |
| 68 | }; |
| 69 | |
| 70 | #ifdef CONFIG_IPV6_XFRM6_TUNNEL_DEBUG |
| 71 | # define XFRM6_TUNNEL_SPI_MAGIC 0xdeadbeef |
| 72 | #endif |
| 73 | |
| 74 | static DEFINE_RWLOCK(xfrm6_tunnel_spi_lock); |
| 75 | |
| 76 | static u32 xfrm6_tunnel_spi; |
| 77 | |
| 78 | #define XFRM6_TUNNEL_SPI_MIN 1 |
| 79 | #define XFRM6_TUNNEL_SPI_MAX 0xffffffff |
| 80 | |
Eric Dumazet | ba89966 | 2005-08-26 12:05:31 -0700 | [diff] [blame] | 81 | static kmem_cache_t *xfrm6_tunnel_spi_kmem __read_mostly; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 82 | |
| 83 | #define XFRM6_TUNNEL_SPI_BYADDR_HSIZE 256 |
| 84 | #define XFRM6_TUNNEL_SPI_BYSPI_HSIZE 256 |
| 85 | |
| 86 | static struct hlist_head xfrm6_tunnel_spi_byaddr[XFRM6_TUNNEL_SPI_BYADDR_HSIZE]; |
| 87 | static struct hlist_head xfrm6_tunnel_spi_byspi[XFRM6_TUNNEL_SPI_BYSPI_HSIZE]; |
| 88 | |
| 89 | #ifdef XFRM6_TUNNEL_SPI_MAGIC |
| 90 | static int x6spi_check_magic(const struct xfrm6_tunnel_spi *x6spi, |
| 91 | const char *name) |
| 92 | { |
| 93 | if (unlikely(x6spi->magic != XFRM6_TUNNEL_SPI_MAGIC)) { |
| 94 | X6TPRINTK3(KERN_DEBUG "%s(): x6spi object " |
| 95 | "at %p has corrupted magic %08x " |
| 96 | "(should be %08x)\n", |
| 97 | name, x6spi, x6spi->magic, XFRM6_TUNNEL_SPI_MAGIC); |
| 98 | return -1; |
| 99 | } |
| 100 | return 0; |
| 101 | } |
| 102 | #else |
| 103 | static int inline x6spi_check_magic(const struct xfrm6_tunnel_spi *x6spi, |
| 104 | const char *name) |
| 105 | { |
| 106 | return 0; |
| 107 | } |
| 108 | #endif |
| 109 | |
| 110 | #define X6SPI_CHECK_MAGIC(x6spi) x6spi_check_magic((x6spi), __FUNCTION__) |
| 111 | |
| 112 | |
| 113 | static unsigned inline xfrm6_tunnel_spi_hash_byaddr(xfrm_address_t *addr) |
| 114 | { |
| 115 | unsigned h; |
| 116 | |
| 117 | X6TPRINTK3(KERN_DEBUG "%s(addr=%p)\n", __FUNCTION__, addr); |
| 118 | |
| 119 | h = addr->a6[0] ^ addr->a6[1] ^ addr->a6[2] ^ addr->a6[3]; |
| 120 | h ^= h >> 16; |
| 121 | h ^= h >> 8; |
| 122 | h &= XFRM6_TUNNEL_SPI_BYADDR_HSIZE - 1; |
| 123 | |
| 124 | X6TPRINTK3(KERN_DEBUG "%s() = %u\n", __FUNCTION__, h); |
| 125 | |
| 126 | return h; |
| 127 | } |
| 128 | |
| 129 | static unsigned inline xfrm6_tunnel_spi_hash_byspi(u32 spi) |
| 130 | { |
| 131 | return spi % XFRM6_TUNNEL_SPI_BYSPI_HSIZE; |
| 132 | } |
| 133 | |
| 134 | |
| 135 | static int xfrm6_tunnel_spi_init(void) |
| 136 | { |
| 137 | int i; |
| 138 | |
| 139 | X6TPRINTK3(KERN_DEBUG "%s()\n", __FUNCTION__); |
| 140 | |
| 141 | xfrm6_tunnel_spi = 0; |
| 142 | xfrm6_tunnel_spi_kmem = kmem_cache_create("xfrm6_tunnel_spi", |
| 143 | sizeof(struct xfrm6_tunnel_spi), |
| 144 | 0, SLAB_HWCACHE_ALIGN, |
| 145 | NULL, NULL); |
| 146 | if (!xfrm6_tunnel_spi_kmem) { |
| 147 | X6TPRINTK1(KERN_ERR |
| 148 | "%s(): failed to allocate xfrm6_tunnel_spi_kmem\n", |
| 149 | __FUNCTION__); |
| 150 | return -ENOMEM; |
| 151 | } |
| 152 | |
| 153 | for (i = 0; i < XFRM6_TUNNEL_SPI_BYADDR_HSIZE; i++) |
| 154 | INIT_HLIST_HEAD(&xfrm6_tunnel_spi_byaddr[i]); |
| 155 | for (i = 0; i < XFRM6_TUNNEL_SPI_BYSPI_HSIZE; i++) |
| 156 | INIT_HLIST_HEAD(&xfrm6_tunnel_spi_byspi[i]); |
| 157 | return 0; |
| 158 | } |
| 159 | |
| 160 | static void xfrm6_tunnel_spi_fini(void) |
| 161 | { |
| 162 | int i; |
| 163 | |
| 164 | X6TPRINTK3(KERN_DEBUG "%s()\n", __FUNCTION__); |
| 165 | |
| 166 | for (i = 0; i < XFRM6_TUNNEL_SPI_BYADDR_HSIZE; i++) { |
| 167 | if (!hlist_empty(&xfrm6_tunnel_spi_byaddr[i])) |
| 168 | goto err; |
| 169 | } |
| 170 | for (i = 0; i < XFRM6_TUNNEL_SPI_BYSPI_HSIZE; i++) { |
| 171 | if (!hlist_empty(&xfrm6_tunnel_spi_byspi[i])) |
| 172 | goto err; |
| 173 | } |
| 174 | kmem_cache_destroy(xfrm6_tunnel_spi_kmem); |
| 175 | xfrm6_tunnel_spi_kmem = NULL; |
| 176 | return; |
| 177 | err: |
| 178 | X6TPRINTK1(KERN_ERR "%s(): table is not empty\n", __FUNCTION__); |
| 179 | return; |
| 180 | } |
| 181 | |
| 182 | static struct xfrm6_tunnel_spi *__xfrm6_tunnel_spi_lookup(xfrm_address_t *saddr) |
| 183 | { |
| 184 | struct xfrm6_tunnel_spi *x6spi; |
| 185 | struct hlist_node *pos; |
| 186 | |
| 187 | X6TPRINTK3(KERN_DEBUG "%s(saddr=%p)\n", __FUNCTION__, saddr); |
| 188 | |
| 189 | hlist_for_each_entry(x6spi, pos, |
| 190 | &xfrm6_tunnel_spi_byaddr[xfrm6_tunnel_spi_hash_byaddr(saddr)], |
| 191 | list_byaddr) { |
| 192 | if (memcmp(&x6spi->addr, saddr, sizeof(x6spi->addr)) == 0) { |
| 193 | X6SPI_CHECK_MAGIC(x6spi); |
| 194 | X6TPRINTK3(KERN_DEBUG "%s() = %p(%u)\n", __FUNCTION__, x6spi, x6spi->spi); |
| 195 | return x6spi; |
| 196 | } |
| 197 | } |
| 198 | |
| 199 | X6TPRINTK3(KERN_DEBUG "%s() = NULL(0)\n", __FUNCTION__); |
| 200 | return NULL; |
| 201 | } |
| 202 | |
| 203 | u32 xfrm6_tunnel_spi_lookup(xfrm_address_t *saddr) |
| 204 | { |
| 205 | struct xfrm6_tunnel_spi *x6spi; |
| 206 | u32 spi; |
| 207 | |
| 208 | X6TPRINTK3(KERN_DEBUG "%s(saddr=%p)\n", __FUNCTION__, saddr); |
| 209 | |
| 210 | read_lock_bh(&xfrm6_tunnel_spi_lock); |
| 211 | x6spi = __xfrm6_tunnel_spi_lookup(saddr); |
| 212 | spi = x6spi ? x6spi->spi : 0; |
| 213 | read_unlock_bh(&xfrm6_tunnel_spi_lock); |
| 214 | return spi; |
| 215 | } |
| 216 | |
| 217 | EXPORT_SYMBOL(xfrm6_tunnel_spi_lookup); |
| 218 | |
| 219 | static u32 __xfrm6_tunnel_alloc_spi(xfrm_address_t *saddr) |
| 220 | { |
| 221 | u32 spi; |
| 222 | struct xfrm6_tunnel_spi *x6spi; |
| 223 | struct hlist_node *pos; |
| 224 | unsigned index; |
| 225 | |
| 226 | X6TPRINTK3(KERN_DEBUG "%s(saddr=%p)\n", __FUNCTION__, saddr); |
| 227 | |
| 228 | if (xfrm6_tunnel_spi < XFRM6_TUNNEL_SPI_MIN || |
| 229 | xfrm6_tunnel_spi >= XFRM6_TUNNEL_SPI_MAX) |
| 230 | xfrm6_tunnel_spi = XFRM6_TUNNEL_SPI_MIN; |
| 231 | else |
| 232 | xfrm6_tunnel_spi++; |
| 233 | |
| 234 | for (spi = xfrm6_tunnel_spi; spi <= XFRM6_TUNNEL_SPI_MAX; spi++) { |
| 235 | index = xfrm6_tunnel_spi_hash_byspi(spi); |
| 236 | hlist_for_each_entry(x6spi, pos, |
| 237 | &xfrm6_tunnel_spi_byspi[index], |
| 238 | list_byspi) { |
| 239 | if (x6spi->spi == spi) |
| 240 | goto try_next_1; |
| 241 | } |
| 242 | xfrm6_tunnel_spi = spi; |
| 243 | goto alloc_spi; |
| 244 | try_next_1:; |
| 245 | } |
| 246 | for (spi = XFRM6_TUNNEL_SPI_MIN; spi < xfrm6_tunnel_spi; spi++) { |
| 247 | index = xfrm6_tunnel_spi_hash_byspi(spi); |
| 248 | hlist_for_each_entry(x6spi, pos, |
| 249 | &xfrm6_tunnel_spi_byspi[index], |
| 250 | list_byspi) { |
| 251 | if (x6spi->spi == spi) |
| 252 | goto try_next_2; |
| 253 | } |
| 254 | xfrm6_tunnel_spi = spi; |
| 255 | goto alloc_spi; |
| 256 | try_next_2:; |
| 257 | } |
| 258 | spi = 0; |
| 259 | goto out; |
| 260 | alloc_spi: |
Joe Perches | 46b86a2 | 2006-01-13 14:29:07 -0800 | [diff] [blame] | 261 | X6TPRINTK3(KERN_DEBUG "%s(): allocate new spi for " NIP6_FMT "\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 262 | __FUNCTION__, |
| 263 | NIP6(*(struct in6_addr *)saddr)); |
| 264 | x6spi = kmem_cache_alloc(xfrm6_tunnel_spi_kmem, SLAB_ATOMIC); |
| 265 | if (!x6spi) { |
| 266 | X6TPRINTK1(KERN_ERR "%s(): kmem_cache_alloc() failed\n", |
| 267 | __FUNCTION__); |
| 268 | goto out; |
| 269 | } |
| 270 | #ifdef XFRM6_TUNNEL_SPI_MAGIC |
| 271 | x6spi->magic = XFRM6_TUNNEL_SPI_MAGIC; |
| 272 | #endif |
| 273 | memcpy(&x6spi->addr, saddr, sizeof(x6spi->addr)); |
| 274 | x6spi->spi = spi; |
| 275 | atomic_set(&x6spi->refcnt, 1); |
| 276 | |
| 277 | hlist_add_head(&x6spi->list_byspi, &xfrm6_tunnel_spi_byspi[index]); |
| 278 | |
| 279 | index = xfrm6_tunnel_spi_hash_byaddr(saddr); |
| 280 | hlist_add_head(&x6spi->list_byaddr, &xfrm6_tunnel_spi_byaddr[index]); |
| 281 | X6SPI_CHECK_MAGIC(x6spi); |
| 282 | out: |
| 283 | X6TPRINTK3(KERN_DEBUG "%s() = %u\n", __FUNCTION__, spi); |
| 284 | return spi; |
| 285 | } |
| 286 | |
| 287 | u32 xfrm6_tunnel_alloc_spi(xfrm_address_t *saddr) |
| 288 | { |
| 289 | struct xfrm6_tunnel_spi *x6spi; |
| 290 | u32 spi; |
| 291 | |
| 292 | X6TPRINTK3(KERN_DEBUG "%s(saddr=%p)\n", __FUNCTION__, saddr); |
| 293 | |
| 294 | write_lock_bh(&xfrm6_tunnel_spi_lock); |
| 295 | x6spi = __xfrm6_tunnel_spi_lookup(saddr); |
| 296 | if (x6spi) { |
| 297 | atomic_inc(&x6spi->refcnt); |
| 298 | spi = x6spi->spi; |
| 299 | } else |
| 300 | spi = __xfrm6_tunnel_alloc_spi(saddr); |
| 301 | write_unlock_bh(&xfrm6_tunnel_spi_lock); |
| 302 | |
| 303 | X6TPRINTK3(KERN_DEBUG "%s() = %u\n", __FUNCTION__, spi); |
| 304 | |
| 305 | return spi; |
| 306 | } |
| 307 | |
| 308 | EXPORT_SYMBOL(xfrm6_tunnel_alloc_spi); |
| 309 | |
| 310 | void xfrm6_tunnel_free_spi(xfrm_address_t *saddr) |
| 311 | { |
| 312 | struct xfrm6_tunnel_spi *x6spi; |
| 313 | struct hlist_node *pos, *n; |
| 314 | |
| 315 | X6TPRINTK3(KERN_DEBUG "%s(saddr=%p)\n", __FUNCTION__, saddr); |
| 316 | |
| 317 | write_lock_bh(&xfrm6_tunnel_spi_lock); |
| 318 | |
| 319 | hlist_for_each_entry_safe(x6spi, pos, n, |
| 320 | &xfrm6_tunnel_spi_byaddr[xfrm6_tunnel_spi_hash_byaddr(saddr)], |
| 321 | list_byaddr) |
| 322 | { |
| 323 | if (memcmp(&x6spi->addr, saddr, sizeof(x6spi->addr)) == 0) { |
Joe Perches | 46b86a2 | 2006-01-13 14:29:07 -0800 | [diff] [blame] | 324 | X6TPRINTK3(KERN_DEBUG "%s(): x6spi object for " NIP6_FMT |
| 325 | " found at %p\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 326 | __FUNCTION__, |
| 327 | NIP6(*(struct in6_addr *)saddr), |
| 328 | x6spi); |
| 329 | X6SPI_CHECK_MAGIC(x6spi); |
| 330 | if (atomic_dec_and_test(&x6spi->refcnt)) { |
| 331 | hlist_del(&x6spi->list_byaddr); |
| 332 | hlist_del(&x6spi->list_byspi); |
| 333 | kmem_cache_free(xfrm6_tunnel_spi_kmem, x6spi); |
| 334 | break; |
| 335 | } |
| 336 | } |
| 337 | } |
| 338 | write_unlock_bh(&xfrm6_tunnel_spi_lock); |
| 339 | } |
| 340 | |
| 341 | EXPORT_SYMBOL(xfrm6_tunnel_free_spi); |
| 342 | |
| 343 | static int xfrm6_tunnel_output(struct xfrm_state *x, struct sk_buff *skb) |
| 344 | { |
| 345 | struct ipv6hdr *top_iph; |
| 346 | |
| 347 | top_iph = (struct ipv6hdr *)skb->data; |
| 348 | top_iph->payload_len = htons(skb->len - sizeof(struct ipv6hdr)); |
| 349 | |
| 350 | return 0; |
| 351 | } |
| 352 | |
Herbert Xu | e695633 | 2006-04-01 00:52:46 -0800 | [diff] [blame] | 353 | static int xfrm6_tunnel_input(struct xfrm_state *x, struct sk_buff *skb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 354 | { |
| 355 | return 0; |
| 356 | } |
| 357 | |
Herbert Xu | d2acc34 | 2006-03-28 01:12:13 -0800 | [diff] [blame] | 358 | static int xfrm6_tunnel_rcv(struct sk_buff *skb) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 359 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 360 | struct ipv6hdr *iph = skb->nh.ipv6h; |
| 361 | u32 spi; |
| 362 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 363 | spi = xfrm6_tunnel_spi_lookup((xfrm_address_t *)&iph->saddr); |
Herbert Xu | d2acc34 | 2006-03-28 01:12:13 -0800 | [diff] [blame] | 364 | return xfrm6_rcv_spi(skb, spi); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 365 | } |
| 366 | |
Herbert Xu | d2acc34 | 2006-03-28 01:12:13 -0800 | [diff] [blame] | 367 | static int xfrm6_tunnel_err(struct sk_buff *skb, struct inet6_skb_parm *opt, |
| 368 | int type, int code, int offset, __u32 info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 369 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 370 | /* xfrm6_tunnel native err handling */ |
| 371 | switch (type) { |
| 372 | case ICMPV6_DEST_UNREACH: |
| 373 | switch (code) { |
| 374 | case ICMPV6_NOROUTE: |
| 375 | case ICMPV6_ADM_PROHIBITED: |
| 376 | case ICMPV6_NOT_NEIGHBOUR: |
| 377 | case ICMPV6_ADDR_UNREACH: |
| 378 | case ICMPV6_PORT_UNREACH: |
| 379 | default: |
| 380 | X6TPRINTK3(KERN_DEBUG |
| 381 | "xfrm6_tunnel: Destination Unreach.\n"); |
| 382 | break; |
| 383 | } |
| 384 | break; |
| 385 | case ICMPV6_PKT_TOOBIG: |
| 386 | X6TPRINTK3(KERN_DEBUG |
| 387 | "xfrm6_tunnel: Packet Too Big.\n"); |
| 388 | break; |
| 389 | case ICMPV6_TIME_EXCEED: |
| 390 | switch (code) { |
| 391 | case ICMPV6_EXC_HOPLIMIT: |
| 392 | X6TPRINTK3(KERN_DEBUG |
| 393 | "xfrm6_tunnel: Too small Hoplimit.\n"); |
| 394 | break; |
| 395 | case ICMPV6_EXC_FRAGTIME: |
| 396 | default: |
| 397 | break; |
| 398 | } |
| 399 | break; |
| 400 | case ICMPV6_PARAMPROB: |
| 401 | switch (code) { |
| 402 | case ICMPV6_HDR_FIELD: break; |
| 403 | case ICMPV6_UNK_NEXTHDR: break; |
| 404 | case ICMPV6_UNK_OPTION: break; |
| 405 | } |
| 406 | break; |
| 407 | default: |
| 408 | break; |
| 409 | } |
Herbert Xu | d2acc34 | 2006-03-28 01:12:13 -0800 | [diff] [blame] | 410 | |
| 411 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 412 | } |
| 413 | |
Herbert Xu | 72cb696 | 2005-06-20 13:18:08 -0700 | [diff] [blame] | 414 | static int xfrm6_tunnel_init_state(struct xfrm_state *x) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 415 | { |
| 416 | if (!x->props.mode) |
| 417 | return -EINVAL; |
| 418 | |
| 419 | if (x->encap) |
| 420 | return -EINVAL; |
| 421 | |
| 422 | x->props.header_len = sizeof(struct ipv6hdr); |
| 423 | |
| 424 | return 0; |
| 425 | } |
| 426 | |
| 427 | static void xfrm6_tunnel_destroy(struct xfrm_state *x) |
| 428 | { |
| 429 | xfrm6_tunnel_free_spi((xfrm_address_t *)&x->props.saddr); |
| 430 | } |
| 431 | |
| 432 | static struct xfrm_type xfrm6_tunnel_type = { |
| 433 | .description = "IP6IP6", |
| 434 | .owner = THIS_MODULE, |
| 435 | .proto = IPPROTO_IPV6, |
| 436 | .init_state = xfrm6_tunnel_init_state, |
| 437 | .destructor = xfrm6_tunnel_destroy, |
| 438 | .input = xfrm6_tunnel_input, |
| 439 | .output = xfrm6_tunnel_output, |
| 440 | }; |
| 441 | |
Herbert Xu | d2acc34 | 2006-03-28 01:12:13 -0800 | [diff] [blame] | 442 | static struct xfrm6_tunnel xfrm6_tunnel_handler = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 443 | .handler = xfrm6_tunnel_rcv, |
Herbert Xu | d2acc34 | 2006-03-28 01:12:13 -0800 | [diff] [blame] | 444 | .err_handler = xfrm6_tunnel_err, |
| 445 | .priority = 2, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 446 | }; |
| 447 | |
| 448 | static int __init xfrm6_tunnel_init(void) |
| 449 | { |
| 450 | X6TPRINTK3(KERN_DEBUG "%s()\n", __FUNCTION__); |
| 451 | |
| 452 | if (xfrm_register_type(&xfrm6_tunnel_type, AF_INET6) < 0) { |
| 453 | X6TPRINTK1(KERN_ERR |
| 454 | "xfrm6_tunnel init: can't add xfrm type\n"); |
| 455 | return -EAGAIN; |
| 456 | } |
Herbert Xu | d2acc34 | 2006-03-28 01:12:13 -0800 | [diff] [blame] | 457 | if (xfrm6_tunnel_register(&xfrm6_tunnel_handler)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 458 | X6TPRINTK1(KERN_ERR |
Herbert Xu | d2acc34 | 2006-03-28 01:12:13 -0800 | [diff] [blame] | 459 | "xfrm6_tunnel init(): can't add handler\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 460 | xfrm_unregister_type(&xfrm6_tunnel_type, AF_INET6); |
| 461 | return -EAGAIN; |
| 462 | } |
| 463 | if (xfrm6_tunnel_spi_init() < 0) { |
| 464 | X6TPRINTK1(KERN_ERR |
| 465 | "xfrm6_tunnel init: failed to initialize spi\n"); |
Herbert Xu | d2acc34 | 2006-03-28 01:12:13 -0800 | [diff] [blame] | 466 | xfrm6_tunnel_deregister(&xfrm6_tunnel_handler); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 467 | xfrm_unregister_type(&xfrm6_tunnel_type, AF_INET6); |
| 468 | return -EAGAIN; |
| 469 | } |
| 470 | return 0; |
| 471 | } |
| 472 | |
| 473 | static void __exit xfrm6_tunnel_fini(void) |
| 474 | { |
| 475 | X6TPRINTK3(KERN_DEBUG "%s()\n", __FUNCTION__); |
| 476 | |
| 477 | xfrm6_tunnel_spi_fini(); |
Herbert Xu | d2acc34 | 2006-03-28 01:12:13 -0800 | [diff] [blame] | 478 | if (xfrm6_tunnel_deregister(&xfrm6_tunnel_handler)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 479 | X6TPRINTK1(KERN_ERR |
Herbert Xu | d2acc34 | 2006-03-28 01:12:13 -0800 | [diff] [blame] | 480 | "xfrm6_tunnel close: can't remove handler\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 481 | if (xfrm_unregister_type(&xfrm6_tunnel_type, AF_INET6) < 0) |
| 482 | X6TPRINTK1(KERN_ERR |
| 483 | "xfrm6_tunnel close: can't remove xfrm type\n"); |
| 484 | } |
| 485 | |
| 486 | module_init(xfrm6_tunnel_init); |
| 487 | module_exit(xfrm6_tunnel_fini); |
| 488 | MODULE_LICENSE("GPL"); |