| 1 | /* $FreeBSD: src/lib/libipsec/pfkey.c,v 1.1.2.2 2001/07/03 11:01:14 ume Exp $ */ |
| 2 | /* $KAME: pfkey.c,v 1.39 2001/03/05 18:22:17 thorpej Exp $ */ |
| 3 | |
| 4 | /* |
| 5 | * Copyright (C) 1995, 1996, 1997, 1998, and 1999 WIDE Project. |
| 6 | * All rights reserved. |
| 7 | * |
| 8 | * Redistribution and use in source and binary forms, with or without |
| 9 | * modification, are permitted provided that the following conditions |
| 10 | * are met: |
| 11 | * 1. Redistributions of source code must retain the above copyright |
| 12 | * notice, this list of conditions and the following disclaimer. |
| 13 | * 2. Redistributions in binary form must reproduce the above copyright |
| 14 | * notice, this list of conditions and the following disclaimer in the |
| 15 | * documentation and/or other materials provided with the distribution. |
| 16 | * 3. Neither the name of the project nor the names of its contributors |
| 17 | * may be used to endorse or promote products derived from this software |
| 18 | * without specific prior written permission. |
| 19 | * |
| 20 | * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND |
| 21 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 22 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 23 | * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE |
| 24 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 25 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 26 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 27 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 28 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 29 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 30 | * SUCH DAMAGE. |
| 31 | */ |
| 32 | |
| 33 | #include <sys/types.h> |
| 34 | #include <sys/param.h> |
| 35 | #include <sys/socket.h> |
| 36 | #include <net/pfkeyv2.h> |
| 37 | #include <netkey/key_var.h> |
| 38 | #include <netinet/in.h> |
| 39 | #include <netinet6/ipsec.h> |
| 40 | |
| 41 | #include <stdlib.h> |
| 42 | #include <unistd.h> |
| 43 | #include <string.h> |
| 44 | #include <errno.h> |
| 45 | #include <stdio.h> |
| 46 | |
| 47 | #include "ipsec_strerror.h" |
| 48 | #include "libpfkey.h" |
| 49 | |
| 50 | #define CALLOC(size, cast) (cast)calloc(1, (size)) |
| 51 | |
| 52 | static int findsupportedmap (int); |
| 53 | static int setsupportedmap (struct sadb_supported *); |
| 54 | static struct sadb_alg *findsupportedalg (u_int, u_int); |
| 55 | static int pfkey_send_x1 (int, u_int, u_int, u_int, struct sockaddr *, |
| 56 | struct sockaddr *, u_int32_t, u_int32_t, u_int, caddr_t, |
| 57 | u_int, u_int, u_int, u_int, u_int, u_int32_t, u_int32_t, |
| 58 | u_int32_t, u_int32_t, u_int32_t); |
| 59 | static int pfkey_send_x2 (int, u_int, u_int, u_int, |
| 60 | struct sockaddr *, struct sockaddr *, u_int32_t); |
| 61 | static int pfkey_send_x3 (int, u_int, u_int); |
| 62 | static int pfkey_send_x4 (int, u_int, struct sockaddr *, u_int, |
| 63 | struct sockaddr *, u_int, u_int, u_int64_t, u_int64_t, |
| 64 | char *, int, u_int32_t); |
| 65 | static int pfkey_send_x5 (int, u_int, u_int32_t); |
| 66 | |
| 67 | static caddr_t pfkey_setsadbmsg (caddr_t, caddr_t, u_int, u_int, |
| 68 | u_int, u_int32_t, pid_t); |
| 69 | static caddr_t pfkey_setsadbsa (caddr_t, caddr_t, u_int32_t, u_int, |
| 70 | u_int, u_int, u_int32_t); |
| 71 | static caddr_t pfkey_setsadbaddr (caddr_t, caddr_t, u_int, |
| 72 | struct sockaddr *, u_int, u_int); |
| 73 | static caddr_t pfkey_setsadbkey (caddr_t, caddr_t, u_int, caddr_t, u_int); |
| 74 | static caddr_t pfkey_setsadblifetime (caddr_t, caddr_t, u_int, u_int32_t, |
| 75 | u_int32_t, u_int32_t, u_int32_t); |
| 76 | static caddr_t pfkey_setsadbxsa2 (caddr_t, caddr_t, u_int32_t, u_int32_t); |
| 77 | |
| 78 | /* |
| 79 | * make and search supported algorithm structure. |
| 80 | */ |
| 81 | static struct sadb_supported *ipsec_supported[] = { NULL, NULL, NULL, NULL}; |
| 82 | |
| 83 | static int supported_map[] = { |
| 84 | SADB_SATYPE_AH, |
| 85 | SADB_SATYPE_ESP, |
| 86 | SADB_X_SATYPE_IPCOMP, |
| 87 | SADB_X_SATYPE_TCPSIGNATURE, |
| 88 | }; |
| 89 | |
| 90 | static int |
| 91 | findsupportedmap(int satype) |
| 92 | { |
| 93 | int i; |
| 94 | |
| 95 | for (i = 0; i < sizeof(supported_map)/sizeof(supported_map[0]); i++) |
| 96 | if (supported_map[i] == satype) |
| 97 | return i; |
| 98 | return -1; |
| 99 | } |
| 100 | |
| 101 | static struct sadb_alg * |
| 102 | findsupportedalg(u_int satype, u_int alg_id) |
| 103 | { |
| 104 | int algno; |
| 105 | int tlen; |
| 106 | caddr_t p; |
| 107 | |
| 108 | /* validity check */ |
| 109 | algno = findsupportedmap(satype); |
| 110 | if (algno == -1) { |
| 111 | __ipsec_errcode = EIPSEC_INVAL_ARGUMENT; |
| 112 | return NULL; |
| 113 | } |
| 114 | if (ipsec_supported[algno] == NULL) { |
| 115 | __ipsec_errcode = EIPSEC_DO_GET_SUPP_LIST; |
| 116 | return NULL; |
| 117 | } |
| 118 | |
| 119 | tlen = ipsec_supported[algno]->sadb_supported_len |
| 120 | - sizeof(struct sadb_supported); |
| 121 | p = (caddr_t)(ipsec_supported[algno] + 1); |
| 122 | while (tlen > 0) { |
| 123 | if (tlen < sizeof(struct sadb_alg)) { |
| 124 | /* invalid format */ |
| 125 | break; |
| 126 | } |
| 127 | if (((struct sadb_alg *)p)->sadb_alg_id == alg_id) |
| 128 | return (struct sadb_alg *)p; |
| 129 | |
| 130 | tlen -= sizeof(struct sadb_alg); |
| 131 | p += sizeof(struct sadb_alg); |
| 132 | } |
| 133 | |
| 134 | __ipsec_errcode = EIPSEC_NOT_SUPPORTED; |
| 135 | return NULL; |
| 136 | } |
| 137 | |
| 138 | static int |
| 139 | setsupportedmap(struct sadb_supported *sup) |
| 140 | { |
| 141 | struct sadb_supported **ipsup; |
| 142 | |
| 143 | switch (sup->sadb_supported_exttype) { |
| 144 | case SADB_EXT_SUPPORTED_AUTH: |
| 145 | ipsup = &ipsec_supported[findsupportedmap(SADB_SATYPE_AH)]; |
| 146 | break; |
| 147 | case SADB_EXT_SUPPORTED_ENCRYPT: |
| 148 | ipsup = &ipsec_supported[findsupportedmap(SADB_SATYPE_ESP)]; |
| 149 | break; |
| 150 | default: |
| 151 | __ipsec_errcode = EIPSEC_INVAL_SATYPE; |
| 152 | return -1; |
| 153 | } |
| 154 | |
| 155 | if (*ipsup) |
| 156 | free(*ipsup); |
| 157 | |
| 158 | *ipsup = malloc(sup->sadb_supported_len); |
| 159 | if (!*ipsup) { |
| 160 | __ipsec_set_strerror(strerror(errno)); |
| 161 | return -1; |
| 162 | } |
| 163 | memcpy(*ipsup, sup, sup->sadb_supported_len); |
| 164 | |
| 165 | return 0; |
| 166 | } |
| 167 | |
| 168 | /* |
| 169 | * check key length against algorithm specified. |
| 170 | * This function is called with SADB_EXT_SUPPORTED_{AUTH,ENCRYPT} as the |
| 171 | * augument, and only calls to ipsec_check_keylen2(); |
| 172 | * keylen is the unit of bit. |
| 173 | * OUT: |
| 174 | * -1: invalid. |
| 175 | * 0: valid. |
| 176 | */ |
| 177 | int |
| 178 | ipsec_check_keylen(u_int supported, u_int alg_id, u_int keylen) |
| 179 | { |
| 180 | int satype; |
| 181 | |
| 182 | /* validity check */ |
| 183 | switch (supported) { |
| 184 | case SADB_EXT_SUPPORTED_AUTH: |
| 185 | satype = SADB_SATYPE_AH; |
| 186 | break; |
| 187 | case SADB_EXT_SUPPORTED_ENCRYPT: |
| 188 | satype = SADB_SATYPE_ESP; |
| 189 | break; |
| 190 | default: |
| 191 | __ipsec_errcode = EIPSEC_INVAL_ARGUMENT; |
| 192 | return -1; |
| 193 | } |
| 194 | |
| 195 | return ipsec_check_keylen2(satype, alg_id, keylen); |
| 196 | } |
| 197 | |
| 198 | /* |
| 199 | * check key length against algorithm specified. |
| 200 | * satype is one of satype defined at pfkeyv2.h. |
| 201 | * keylen is the unit of bit. |
| 202 | * OUT: |
| 203 | * -1: invalid. |
| 204 | * 0: valid. |
| 205 | */ |
| 206 | int |
| 207 | ipsec_check_keylen2(u_int satype, u_int alg_id, u_int keylen) |
| 208 | { |
| 209 | struct sadb_alg *alg; |
| 210 | |
| 211 | alg = findsupportedalg(satype, alg_id); |
| 212 | if (!alg) |
| 213 | return -1; |
| 214 | |
| 215 | if (keylen < alg->sadb_alg_minbits || keylen > alg->sadb_alg_maxbits) { |
| 216 | __ipsec_errcode = EIPSEC_INVAL_KEYLEN; |
| 217 | return -1; |
| 218 | } |
| 219 | |
| 220 | __ipsec_errcode = EIPSEC_NO_ERROR; |
| 221 | return 0; |
| 222 | } |
| 223 | |
| 224 | /* |
| 225 | * get max/min key length against algorithm specified. |
| 226 | * satype is one of satype defined at pfkeyv2.h. |
| 227 | * keylen is the unit of bit. |
| 228 | * OUT: |
| 229 | * -1: invalid. |
| 230 | * 0: valid. |
| 231 | */ |
| 232 | int |
| 233 | ipsec_get_keylen(u_int supported, u_int alg_id, struct sadb_alg *alg0) |
| 234 | { |
| 235 | struct sadb_alg *alg; |
| 236 | u_int satype; |
| 237 | |
| 238 | /* validity check */ |
| 239 | if (!alg0) { |
| 240 | __ipsec_errcode = EIPSEC_INVAL_ARGUMENT; |
| 241 | return -1; |
| 242 | } |
| 243 | |
| 244 | switch (supported) { |
| 245 | case SADB_EXT_SUPPORTED_AUTH: |
| 246 | satype = SADB_SATYPE_AH; |
| 247 | break; |
| 248 | case SADB_EXT_SUPPORTED_ENCRYPT: |
| 249 | satype = SADB_SATYPE_ESP; |
| 250 | break; |
| 251 | default: |
| 252 | __ipsec_errcode = EIPSEC_INVAL_ARGUMENT; |
| 253 | return -1; |
| 254 | } |
| 255 | |
| 256 | alg = findsupportedalg(satype, alg_id); |
| 257 | if (!alg) |
| 258 | return -1; |
| 259 | |
| 260 | memcpy(alg0, alg, sizeof(*alg0)); |
| 261 | |
| 262 | __ipsec_errcode = EIPSEC_NO_ERROR; |
| 263 | return 0; |
| 264 | } |
| 265 | |
| 266 | /* |
| 267 | * set the rate for SOFT lifetime against HARD one. |
| 268 | * If rate is more than 100 or equal to zero, then set to 100. |
| 269 | */ |
| 270 | static u_int soft_lifetime_allocations_rate = PFKEY_SOFT_LIFETIME_RATE; |
| 271 | static u_int soft_lifetime_bytes_rate = PFKEY_SOFT_LIFETIME_RATE; |
| 272 | static u_int soft_lifetime_addtime_rate = PFKEY_SOFT_LIFETIME_RATE; |
| 273 | static u_int soft_lifetime_usetime_rate = PFKEY_SOFT_LIFETIME_RATE; |
| 274 | |
| 275 | u_int |
| 276 | pfkey_set_softrate(u_int type, u_int rate) |
| 277 | { |
| 278 | __ipsec_errcode = EIPSEC_NO_ERROR; |
| 279 | |
| 280 | if (rate > 100 || rate == 0) |
| 281 | rate = 100; |
| 282 | |
| 283 | switch (type) { |
| 284 | case SADB_X_LIFETIME_ALLOCATIONS: |
| 285 | soft_lifetime_allocations_rate = rate; |
| 286 | return 0; |
| 287 | case SADB_X_LIFETIME_BYTES: |
| 288 | soft_lifetime_bytes_rate = rate; |
| 289 | return 0; |
| 290 | case SADB_X_LIFETIME_ADDTIME: |
| 291 | soft_lifetime_addtime_rate = rate; |
| 292 | return 0; |
| 293 | case SADB_X_LIFETIME_USETIME: |
| 294 | soft_lifetime_usetime_rate = rate; |
| 295 | return 0; |
| 296 | } |
| 297 | |
| 298 | __ipsec_errcode = EIPSEC_INVAL_ARGUMENT; |
| 299 | return 1; |
| 300 | } |
| 301 | |
| 302 | /* |
| 303 | * get current rate for SOFT lifetime against HARD one. |
| 304 | * ATTENTION: ~0 is returned if invalid type was passed. |
| 305 | */ |
| 306 | u_int |
| 307 | pfkey_get_softrate(u_int type) |
| 308 | { |
| 309 | switch (type) { |
| 310 | case SADB_X_LIFETIME_ALLOCATIONS: |
| 311 | return soft_lifetime_allocations_rate; |
| 312 | case SADB_X_LIFETIME_BYTES: |
| 313 | return soft_lifetime_bytes_rate; |
| 314 | case SADB_X_LIFETIME_ADDTIME: |
| 315 | return soft_lifetime_addtime_rate; |
| 316 | case SADB_X_LIFETIME_USETIME: |
| 317 | return soft_lifetime_usetime_rate; |
| 318 | } |
| 319 | |
| 320 | return ~0; |
| 321 | } |
| 322 | |
| 323 | /* |
| 324 | * sending SADB_GETSPI message to the kernel. |
| 325 | * OUT: |
| 326 | * positive: success and return length sent. |
| 327 | * -1 : error occured, and set errno. |
| 328 | */ |
| 329 | int |
| 330 | pfkey_send_getspi(int so, u_int satype, u_int mode, struct sockaddr *src, |
| 331 | struct sockaddr *dst, u_int32_t min, u_int32_t max, u_int32_t reqid, |
| 332 | u_int32_t seq) |
| 333 | { |
| 334 | struct sadb_msg *newmsg; |
| 335 | caddr_t ep; |
| 336 | int len; |
| 337 | int need_spirange = 0; |
| 338 | caddr_t p; |
| 339 | int plen; |
| 340 | |
| 341 | /* validity check */ |
| 342 | if (src == NULL || dst == NULL) { |
| 343 | __ipsec_errcode = EIPSEC_INVAL_ARGUMENT; |
| 344 | return -1; |
| 345 | } |
| 346 | if (src->sa_family != dst->sa_family) { |
| 347 | __ipsec_errcode = EIPSEC_FAMILY_MISMATCH; |
| 348 | return -1; |
| 349 | } |
| 350 | if (min > max || (min > 0 && min <= 255)) { |
| 351 | __ipsec_errcode = EIPSEC_INVAL_SPI; |
| 352 | return -1; |
| 353 | } |
| 354 | switch (src->sa_family) { |
| 355 | case AF_INET: |
| 356 | plen = sizeof(struct in_addr) << 3; |
| 357 | break; |
| 358 | case AF_INET6: |
| 359 | plen = sizeof(struct in6_addr) << 3; |
| 360 | break; |
| 361 | default: |
| 362 | __ipsec_errcode = EIPSEC_INVAL_FAMILY; |
| 363 | return -1; |
| 364 | } |
| 365 | |
| 366 | /* create new sadb_msg to send. */ |
| 367 | len = sizeof(struct sadb_msg) |
| 368 | + sizeof(struct sadb_x_sa2) |
| 369 | + sizeof(struct sadb_address) |
| 370 | + PFKEY_ALIGN8(src->sa_len) |
| 371 | + sizeof(struct sadb_address) |
| 372 | + PFKEY_ALIGN8(dst->sa_len); |
| 373 | |
| 374 | if (min > 255 && max < ~0) { |
| 375 | need_spirange++; |
| 376 | len += sizeof(struct sadb_spirange); |
| 377 | } |
| 378 | |
| 379 | if ((newmsg = CALLOC(len, struct sadb_msg *)) == NULL) { |
| 380 | __ipsec_set_strerror(strerror(errno)); |
| 381 | return -1; |
| 382 | } |
| 383 | ep = ((caddr_t)newmsg) + len; |
| 384 | |
| 385 | p = pfkey_setsadbmsg((caddr_t)newmsg, ep, SADB_GETSPI, |
| 386 | len, satype, seq, getpid()); |
| 387 | if (!p) { |
| 388 | free(newmsg); |
| 389 | return -1; |
| 390 | } |
| 391 | |
| 392 | p = pfkey_setsadbxsa2(p, ep, mode, reqid); |
| 393 | if (!p) { |
| 394 | free(newmsg); |
| 395 | return -1; |
| 396 | } |
| 397 | |
| 398 | /* set sadb_address for source */ |
| 399 | p = pfkey_setsadbaddr(p, ep, SADB_EXT_ADDRESS_SRC, src, plen, |
| 400 | IPSEC_ULPROTO_ANY); |
| 401 | if (!p) { |
| 402 | free(newmsg); |
| 403 | return -1; |
| 404 | } |
| 405 | |
| 406 | /* set sadb_address for destination */ |
| 407 | p = pfkey_setsadbaddr(p, ep, SADB_EXT_ADDRESS_DST, dst, plen, |
| 408 | IPSEC_ULPROTO_ANY); |
| 409 | if (!p) { |
| 410 | free(newmsg); |
| 411 | return -1; |
| 412 | } |
| 413 | |
| 414 | /* proccessing spi range */ |
| 415 | if (need_spirange) { |
| 416 | struct sadb_spirange spirange; |
| 417 | |
| 418 | if (p + sizeof(spirange) > ep) { |
| 419 | free(newmsg); |
| 420 | return -1; |
| 421 | } |
| 422 | |
| 423 | memset(&spirange, 0, sizeof(spirange)); |
| 424 | spirange.sadb_spirange_len = PFKEY_UNIT64(sizeof(spirange)); |
| 425 | spirange.sadb_spirange_exttype = SADB_EXT_SPIRANGE; |
| 426 | spirange.sadb_spirange_min = min; |
| 427 | spirange.sadb_spirange_max = max; |
| 428 | |
| 429 | memcpy(p, &spirange, sizeof(spirange)); |
| 430 | |
| 431 | p += sizeof(spirange); |
| 432 | } |
| 433 | if (p != ep) { |
| 434 | free(newmsg); |
| 435 | return -1; |
| 436 | } |
| 437 | |
| 438 | /* send message */ |
| 439 | len = pfkey_send(so, newmsg, len); |
| 440 | free(newmsg); |
| 441 | |
| 442 | if (len < 0) |
| 443 | return -1; |
| 444 | |
| 445 | __ipsec_errcode = EIPSEC_NO_ERROR; |
| 446 | return len; |
| 447 | } |
| 448 | |
| 449 | /* |
| 450 | * sending SADB_UPDATE message to the kernel. |
| 451 | * The length of key material is a_keylen + e_keylen. |
| 452 | * OUT: |
| 453 | * positive: success and return length sent. |
| 454 | * -1 : error occured, and set errno. |
| 455 | */ |
| 456 | int |
| 457 | pfkey_send_update(int so, u_int satype, u_int mode, struct sockaddr *src, |
| 458 | struct sockaddr *dst, u_int32_t spi, u_int32_t reqid, u_int wsize, |
| 459 | caddr_t keymat, u_int e_type, u_int e_keylen, u_int a_type, u_int a_keylen, |
| 460 | u_int flags,u_int32_t l_alloc, u_int64_t l_bytes, u_int64_t l_addtime, |
| 461 | u_int64_t l_usetime, u_int32_t seq) |
| 462 | { |
| 463 | int len; |
| 464 | if ((len = pfkey_send_x1(so, SADB_UPDATE, satype, mode, src, dst, spi, |
| 465 | reqid, wsize, |
| 466 | keymat, e_type, e_keylen, a_type, a_keylen, flags, |
| 467 | l_alloc, l_bytes, l_addtime, l_usetime, seq)) < 0) |
| 468 | return -1; |
| 469 | |
| 470 | return len; |
| 471 | } |
| 472 | |
| 473 | /* |
| 474 | * sending SADB_ADD message to the kernel. |
| 475 | * The length of key material is a_keylen + e_keylen. |
| 476 | * OUT: |
| 477 | * positive: success and return length sent. |
| 478 | * -1 : error occured, and set errno. |
| 479 | */ |
| 480 | int |
| 481 | pfkey_send_add(int so, u_int satype, u_int mode, struct sockaddr *src, |
| 482 | struct sockaddr *dst, u_int32_t spi, u_int32_t reqid, u_int wsize, |
| 483 | caddr_t keymat, u_int e_type, u_int e_keylen, u_int a_type, u_int a_keylen, |
| 484 | u_int flags, u_int32_t l_alloc, u_int64_t l_bytes, u_int64_t l_addtime, |
| 485 | u_int64_t l_usetime, u_int32_t seq) |
| 486 | { |
| 487 | int len; |
| 488 | if ((len = pfkey_send_x1(so, SADB_ADD, satype, mode, src, dst, spi, |
| 489 | reqid, wsize, |
| 490 | keymat, e_type, e_keylen, a_type, a_keylen, flags, |
| 491 | l_alloc, l_bytes, l_addtime, l_usetime, seq)) < 0) |
| 492 | return -1; |
| 493 | |
| 494 | return len; |
| 495 | } |
| 496 | |
| 497 | /* |
| 498 | * sending SADB_DELETE message to the kernel. |
| 499 | * OUT: |
| 500 | * positive: success and return length sent. |
| 501 | * -1 : error occured, and set errno. |
| 502 | */ |
| 503 | int |
| 504 | pfkey_send_delete(int so, u_int satype, u_int mode, struct sockaddr *src, |
| 505 | struct sockaddr *dst, u_int32_t spi) |
| 506 | { |
| 507 | int len; |
| 508 | if ((len = pfkey_send_x2(so, SADB_DELETE, satype, mode, src, dst, spi)) < 0) |
| 509 | return -1; |
| 510 | |
| 511 | return len; |
| 512 | } |
| 513 | |
| 514 | /* |
| 515 | * sending SADB_DELETE without spi to the kernel. This is |
| 516 | * the "delete all" request (an extension also present in |
| 517 | * Solaris). |
| 518 | * |
| 519 | * OUT: |
| 520 | * positive: success and return length sent |
| 521 | * -1 : error occured, and set errno |
| 522 | */ |
| 523 | int |
| 524 | pfkey_send_delete_all(int so, u_int satype, u_int mode, struct sockaddr *src, |
| 525 | struct sockaddr *dst) |
| 526 | { |
| 527 | struct sadb_msg *newmsg; |
| 528 | int len; |
| 529 | caddr_t p; |
| 530 | int plen; |
| 531 | caddr_t ep; |
| 532 | |
| 533 | /* validity check */ |
| 534 | if (src == NULL || dst == NULL) { |
| 535 | __ipsec_errcode = EIPSEC_INVAL_ARGUMENT; |
| 536 | return -1; |
| 537 | } |
| 538 | if (src->sa_family != dst->sa_family) { |
| 539 | __ipsec_errcode = EIPSEC_FAMILY_MISMATCH; |
| 540 | return -1; |
| 541 | } |
| 542 | switch (src->sa_family) { |
| 543 | case AF_INET: |
| 544 | plen = sizeof(struct in_addr) << 3; |
| 545 | break; |
| 546 | case AF_INET6: |
| 547 | plen = sizeof(struct in6_addr) << 3; |
| 548 | break; |
| 549 | default: |
| 550 | __ipsec_errcode = EIPSEC_INVAL_FAMILY; |
| 551 | return -1; |
| 552 | } |
| 553 | |
| 554 | /* create new sadb_msg to reply. */ |
| 555 | len = sizeof(struct sadb_msg) |
| 556 | + sizeof(struct sadb_address) |
| 557 | + PFKEY_ALIGN8(src->sa_len) |
| 558 | + sizeof(struct sadb_address) |
| 559 | + PFKEY_ALIGN8(dst->sa_len); |
| 560 | |
| 561 | if ((newmsg = CALLOC(len, struct sadb_msg *)) == NULL) { |
| 562 | __ipsec_set_strerror(strerror(errno)); |
| 563 | return -1; |
| 564 | } |
| 565 | ep = ((caddr_t)newmsg) + len; |
| 566 | |
| 567 | p = pfkey_setsadbmsg((caddr_t)newmsg, ep, SADB_DELETE, len, satype, 0, |
| 568 | getpid()); |
| 569 | if (!p) { |
| 570 | free(newmsg); |
| 571 | return -1; |
| 572 | } |
| 573 | p = pfkey_setsadbaddr(p, ep, SADB_EXT_ADDRESS_SRC, src, plen, |
| 574 | IPSEC_ULPROTO_ANY); |
| 575 | if (!p) { |
| 576 | free(newmsg); |
| 577 | return -1; |
| 578 | } |
| 579 | p = pfkey_setsadbaddr(p, ep, SADB_EXT_ADDRESS_DST, dst, plen, |
| 580 | IPSEC_ULPROTO_ANY); |
| 581 | if (!p || p != ep) { |
| 582 | free(newmsg); |
| 583 | return -1; |
| 584 | } |
| 585 | |
| 586 | /* send message */ |
| 587 | len = pfkey_send(so, newmsg, len); |
| 588 | free(newmsg); |
| 589 | |
| 590 | if (len < 0) |
| 591 | return -1; |
| 592 | |
| 593 | __ipsec_errcode = EIPSEC_NO_ERROR; |
| 594 | return len; |
| 595 | } |
| 596 | |
| 597 | /* |
| 598 | * sending SADB_GET message to the kernel. |
| 599 | * OUT: |
| 600 | * positive: success and return length sent. |
| 601 | * -1 : error occured, and set errno. |
| 602 | */ |
| 603 | int |
| 604 | pfkey_send_get(int so, u_int satype, u_int mode, struct sockaddr *src, |
| 605 | struct sockaddr *dst, u_int32_t spi) |
| 606 | { |
| 607 | int len; |
| 608 | if ((len = pfkey_send_x2(so, SADB_GET, satype, mode, src, dst, spi)) < 0) |
| 609 | return -1; |
| 610 | |
| 611 | return len; |
| 612 | } |
| 613 | |
| 614 | /* |
| 615 | * sending SADB_REGISTER message to the kernel. |
| 616 | * OUT: |
| 617 | * positive: success and return length sent. |
| 618 | * -1 : error occured, and set errno. |
| 619 | */ |
| 620 | int |
| 621 | pfkey_send_register(int so, u_int satype) |
| 622 | { |
| 623 | int len, algno; |
| 624 | |
| 625 | if (satype == PF_UNSPEC) { |
| 626 | for (algno = 0; |
| 627 | algno < sizeof(supported_map)/sizeof(supported_map[0]); |
| 628 | algno++) { |
| 629 | if (ipsec_supported[algno]) { |
| 630 | free(ipsec_supported[algno]); |
| 631 | ipsec_supported[algno] = NULL; |
| 632 | } |
| 633 | } |
| 634 | } else { |
| 635 | algno = findsupportedmap(satype); |
| 636 | if (algno == -1) { |
| 637 | __ipsec_errcode = EIPSEC_INVAL_ARGUMENT; |
| 638 | return -1; |
| 639 | } |
| 640 | |
| 641 | if (ipsec_supported[algno]) { |
| 642 | free(ipsec_supported[algno]); |
| 643 | ipsec_supported[algno] = NULL; |
| 644 | } |
| 645 | } |
| 646 | |
| 647 | if ((len = pfkey_send_x3(so, SADB_REGISTER, satype)) < 0) |
| 648 | return -1; |
| 649 | |
| 650 | return len; |
| 651 | } |
| 652 | |
| 653 | /* |
| 654 | * receiving SADB_REGISTER message from the kernel, and copy buffer for |
| 655 | * sadb_supported returned into ipsec_supported. |
| 656 | * OUT: |
| 657 | * 0: success and return length sent. |
| 658 | * -1: error occured, and set errno. |
| 659 | */ |
| 660 | int |
| 661 | pfkey_recv_register(int so) |
| 662 | { |
| 663 | pid_t pid = getpid(); |
| 664 | struct sadb_msg *newmsg; |
| 665 | int error = -1; |
| 666 | |
| 667 | /* receive message */ |
| 668 | do { |
| 669 | if ((newmsg = pfkey_recv(so)) == NULL) |
| 670 | return -1; |
| 671 | } while (newmsg->sadb_msg_type != SADB_REGISTER |
| 672 | || newmsg->sadb_msg_pid != pid); |
| 673 | |
| 674 | /* check and fix */ |
| 675 | newmsg->sadb_msg_len = PFKEY_UNUNIT64(newmsg->sadb_msg_len); |
| 676 | |
| 677 | error = pfkey_set_supported(newmsg, newmsg->sadb_msg_len); |
| 678 | free(newmsg); |
| 679 | |
| 680 | if (error == 0) |
| 681 | __ipsec_errcode = EIPSEC_NO_ERROR; |
| 682 | |
| 683 | return error; |
| 684 | } |
| 685 | |
| 686 | /* |
| 687 | * receiving SADB_REGISTER message from the kernel, and copy buffer for |
| 688 | * sadb_supported returned into ipsec_supported. |
| 689 | * NOTE: sadb_msg_len must be host order. |
| 690 | * IN: |
| 691 | * tlen: msg length, it's to makeing sure. |
| 692 | * OUT: |
| 693 | * 0: success and return length sent. |
| 694 | * -1: error occured, and set errno. |
| 695 | */ |
| 696 | int |
| 697 | pfkey_set_supported(struct sadb_msg *msg, int tlen) |
| 698 | { |
| 699 | struct sadb_supported *sup; |
| 700 | caddr_t p; |
| 701 | caddr_t ep; |
| 702 | |
| 703 | /* validity */ |
| 704 | if (msg->sadb_msg_len != tlen) { |
| 705 | __ipsec_errcode = EIPSEC_INVAL_ARGUMENT; |
| 706 | return -1; |
| 707 | } |
| 708 | |
| 709 | p = (caddr_t)msg; |
| 710 | ep = p + tlen; |
| 711 | |
| 712 | p += sizeof(struct sadb_msg); |
| 713 | |
| 714 | while (p < ep) { |
| 715 | sup = (struct sadb_supported *)p; |
| 716 | if (ep < p + sizeof(*sup) || |
| 717 | PFKEY_EXTLEN(sup) < sizeof(*sup) || |
| 718 | ep < p + sup->sadb_supported_len) { |
| 719 | /* invalid format */ |
| 720 | break; |
| 721 | } |
| 722 | |
| 723 | switch (sup->sadb_supported_exttype) { |
| 724 | case SADB_EXT_SUPPORTED_AUTH: |
| 725 | case SADB_EXT_SUPPORTED_ENCRYPT: |
| 726 | break; |
| 727 | default: |
| 728 | __ipsec_errcode = EIPSEC_INVAL_SATYPE; |
| 729 | return -1; |
| 730 | } |
| 731 | |
| 732 | /* fixed length */ |
| 733 | sup->sadb_supported_len = PFKEY_EXTLEN(sup); |
| 734 | |
| 735 | /* set supported map */ |
| 736 | if (setsupportedmap(sup) != 0) |
| 737 | return -1; |
| 738 | |
| 739 | p += sup->sadb_supported_len; |
| 740 | } |
| 741 | |
| 742 | if (p != ep) { |
| 743 | __ipsec_errcode = EIPSEC_INVAL_SATYPE; |
| 744 | return -1; |
| 745 | } |
| 746 | |
| 747 | __ipsec_errcode = EIPSEC_NO_ERROR; |
| 748 | |
| 749 | return 0; |
| 750 | } |
| 751 | |
| 752 | /* |
| 753 | * sending SADB_FLUSH message to the kernel. |
| 754 | * OUT: |
| 755 | * positive: success and return length sent. |
| 756 | * -1 : error occured, and set errno. |
| 757 | */ |
| 758 | int |
| 759 | pfkey_send_flush(int so, u_int satype) |
| 760 | { |
| 761 | int len; |
| 762 | |
| 763 | if ((len = pfkey_send_x3(so, SADB_FLUSH, satype)) < 0) |
| 764 | return -1; |
| 765 | |
| 766 | return len; |
| 767 | } |
| 768 | |
| 769 | /* |
| 770 | * sending SADB_DUMP message to the kernel. |
| 771 | * OUT: |
| 772 | * positive: success and return length sent. |
| 773 | * -1 : error occured, and set errno. |
| 774 | */ |
| 775 | int |
| 776 | pfkey_send_dump(int so, u_int satype) |
| 777 | { |
| 778 | int len; |
| 779 | |
| 780 | if ((len = pfkey_send_x3(so, SADB_DUMP, satype)) < 0) |
| 781 | return -1; |
| 782 | |
| 783 | return len; |
| 784 | } |
| 785 | |
| 786 | /* |
| 787 | * sending SADB_X_PROMISC message to the kernel. |
| 788 | * NOTE that this function handles promisc mode toggle only. |
| 789 | * IN: |
| 790 | * flag: set promisc off if zero, set promisc on if non-zero. |
| 791 | * OUT: |
| 792 | * positive: success and return length sent. |
| 793 | * -1 : error occured, and set errno. |
| 794 | * 0 : error occured, and set errno. |
| 795 | * others: a pointer to new allocated buffer in which supported |
| 796 | * algorithms is. |
| 797 | */ |
| 798 | int |
| 799 | pfkey_send_promisc_toggle(int so, int flag) |
| 800 | { |
| 801 | int len; |
| 802 | |
| 803 | if ((len = pfkey_send_x3(so, SADB_X_PROMISC, (flag ? 1 : 0))) < 0) |
| 804 | return -1; |
| 805 | |
| 806 | return len; |
| 807 | } |
| 808 | |
| 809 | /* |
| 810 | * sending SADB_X_SPDADD message to the kernel. |
| 811 | * OUT: |
| 812 | * positive: success and return length sent. |
| 813 | * -1 : error occured, and set errno. |
| 814 | */ |
| 815 | int |
| 816 | pfkey_send_spdadd(int so, struct sockaddr *src, u_int prefs, |
| 817 | struct sockaddr *dst, u_int prefd, u_int proto, caddr_t policy, |
| 818 | int policylen, u_int32_t seq) |
| 819 | { |
| 820 | int len; |
| 821 | |
| 822 | if ((len = pfkey_send_x4(so, SADB_X_SPDADD, |
| 823 | src, prefs, dst, prefd, proto, |
| 824 | 0, 0, |
| 825 | policy, policylen, seq)) < 0) |
| 826 | return -1; |
| 827 | |
| 828 | return len; |
| 829 | } |
| 830 | |
| 831 | /* |
| 832 | * sending SADB_X_SPDADD message to the kernel. |
| 833 | * OUT: |
| 834 | * positive: success and return length sent. |
| 835 | * -1 : error occured, and set errno. |
| 836 | */ |
| 837 | int |
| 838 | pfkey_send_spdadd2(int so, struct sockaddr *src, u_int prefs, |
| 839 | struct sockaddr *dst, u_int prefd, u_int proto, u_int64_t ltime, |
| 840 | u_int64_t vtime, caddr_t policy, int policylen, u_int32_t seq) |
| 841 | { |
| 842 | int len; |
| 843 | |
| 844 | if ((len = pfkey_send_x4(so, SADB_X_SPDADD, |
| 845 | src, prefs, dst, prefd, proto, |
| 846 | ltime, vtime, |
| 847 | policy, policylen, seq)) < 0) |
| 848 | return -1; |
| 849 | |
| 850 | return len; |
| 851 | } |
| 852 | |
| 853 | /* |
| 854 | * sending SADB_X_SPDUPDATE message to the kernel. |
| 855 | * OUT: |
| 856 | * positive: success and return length sent. |
| 857 | * -1 : error occured, and set errno. |
| 858 | */ |
| 859 | int |
| 860 | pfkey_send_spdupdate(int so, struct sockaddr *src, u_int prefs, |
| 861 | struct sockaddr *dst, u_int prefd, u_int proto, caddr_t policy, |
| 862 | int policylen, u_int32_t seq) |
| 863 | { |
| 864 | int len; |
| 865 | |
| 866 | if ((len = pfkey_send_x4(so, SADB_X_SPDUPDATE, |
| 867 | src, prefs, dst, prefd, proto, |
| 868 | 0, 0, |
| 869 | policy, policylen, seq)) < 0) |
| 870 | return -1; |
| 871 | |
| 872 | return len; |
| 873 | } |
| 874 | |
| 875 | /* |
| 876 | * sending SADB_X_SPDUPDATE message to the kernel. |
| 877 | * OUT: |
| 878 | * positive: success and return length sent. |
| 879 | * -1 : error occured, and set errno. |
| 880 | */ |
| 881 | int |
| 882 | pfkey_send_spdupdate2(int so, struct sockaddr *src, u_int prefs, |
| 883 | struct sockaddr *dst, u_int prefd, u_int proto, u_int64_t ltime, |
| 884 | u_int64_t vtime, caddr_t policy, int policylen, u_int32_t seq) |
| 885 | { |
| 886 | int len; |
| 887 | |
| 888 | if ((len = pfkey_send_x4(so, SADB_X_SPDUPDATE, |
| 889 | src, prefs, dst, prefd, proto, |
| 890 | ltime, vtime, |
| 891 | policy, policylen, seq)) < 0) |
| 892 | return -1; |
| 893 | |
| 894 | return len; |
| 895 | } |
| 896 | |
| 897 | /* |
| 898 | * sending SADB_X_SPDDELETE message to the kernel. |
| 899 | * OUT: |
| 900 | * positive: success and return length sent. |
| 901 | * -1 : error occured, and set errno. |
| 902 | */ |
| 903 | int |
| 904 | pfkey_send_spddelete(int so, struct sockaddr *src, u_int prefs, |
| 905 | struct sockaddr *dst, u_int prefd, u_int proto, caddr_t policy, |
| 906 | int policylen, u_int32_t seq) |
| 907 | { |
| 908 | int len; |
| 909 | |
| 910 | if (policylen != sizeof(struct sadb_x_policy)) { |
| 911 | __ipsec_errcode = EIPSEC_INVAL_ARGUMENT; |
| 912 | return -1; |
| 913 | } |
| 914 | |
| 915 | if ((len = pfkey_send_x4(so, SADB_X_SPDDELETE, |
| 916 | src, prefs, dst, prefd, proto, |
| 917 | 0, 0, |
| 918 | policy, policylen, seq)) < 0) |
| 919 | return -1; |
| 920 | |
| 921 | return len; |
| 922 | } |
| 923 | |
| 924 | /* |
| 925 | * sending SADB_X_SPDDELETE message to the kernel. |
| 926 | * OUT: |
| 927 | * positive: success and return length sent. |
| 928 | * -1 : error occured, and set errno. |
| 929 | */ |
| 930 | int |
| 931 | pfkey_send_spddelete2(int so, u_int32_t spid) |
| 932 | { |
| 933 | int len; |
| 934 | |
| 935 | if ((len = pfkey_send_x5(so, SADB_X_SPDDELETE2, spid)) < 0) |
| 936 | return -1; |
| 937 | |
| 938 | return len; |
| 939 | } |
| 940 | |
| 941 | /* |
| 942 | * sending SADB_X_SPDGET message to the kernel. |
| 943 | * OUT: |
| 944 | * positive: success and return length sent. |
| 945 | * -1 : error occured, and set errno. |
| 946 | */ |
| 947 | int |
| 948 | pfkey_send_spdget(int so, u_int32_t spid) |
| 949 | { |
| 950 | int len; |
| 951 | |
| 952 | if ((len = pfkey_send_x5(so, SADB_X_SPDGET, spid)) < 0) |
| 953 | return -1; |
| 954 | |
| 955 | return len; |
| 956 | } |
| 957 | |
| 958 | /* |
| 959 | * sending SADB_X_SPDSETIDX message to the kernel. |
| 960 | * OUT: |
| 961 | * positive: success and return length sent. |
| 962 | * -1 : error occured, and set errno. |
| 963 | */ |
| 964 | int |
| 965 | pfkey_send_spdsetidx(int so, struct sockaddr *src, u_int prefs, |
| 966 | struct sockaddr *dst, u_int prefd, u_int proto, caddr_t policy, |
| 967 | int policylen, u_int32_t seq) |
| 968 | { |
| 969 | int len; |
| 970 | |
| 971 | if (policylen != sizeof(struct sadb_x_policy)) { |
| 972 | __ipsec_errcode = EIPSEC_INVAL_ARGUMENT; |
| 973 | return -1; |
| 974 | } |
| 975 | |
| 976 | if ((len = pfkey_send_x4(so, SADB_X_SPDSETIDX, |
| 977 | src, prefs, dst, prefd, proto, |
| 978 | 0, 0, |
| 979 | policy, policylen, seq)) < 0) |
| 980 | return -1; |
| 981 | |
| 982 | return len; |
| 983 | } |
| 984 | |
| 985 | /* |
| 986 | * sending SADB_SPDFLUSH message to the kernel. |
| 987 | * OUT: |
| 988 | * positive: success and return length sent. |
| 989 | * -1 : error occured, and set errno. |
| 990 | */ |
| 991 | int |
| 992 | pfkey_send_spdflush(int so) |
| 993 | { |
| 994 | int len; |
| 995 | |
| 996 | if ((len = pfkey_send_x3(so, SADB_X_SPDFLUSH, SADB_SATYPE_UNSPEC)) < 0) |
| 997 | return -1; |
| 998 | |
| 999 | return len; |
| 1000 | } |
| 1001 | |
| 1002 | /* |
| 1003 | * sending SADB_SPDDUMP message to the kernel. |
| 1004 | * OUT: |
| 1005 | * positive: success and return length sent. |
| 1006 | * -1 : error occured, and set errno. |
| 1007 | */ |
| 1008 | int |
| 1009 | pfkey_send_spddump(int so) |
| 1010 | { |
| 1011 | int len; |
| 1012 | |
| 1013 | if ((len = pfkey_send_x3(so, SADB_X_SPDDUMP, SADB_SATYPE_UNSPEC)) < 0) |
| 1014 | return -1; |
| 1015 | |
| 1016 | return len; |
| 1017 | } |
| 1018 | |
| 1019 | /* sending SADB_ADD or SADB_UPDATE message to the kernel */ |
| 1020 | static int |
| 1021 | pfkey_send_x1(int so, u_int type, u_int satype, u_int mode, |
| 1022 | struct sockaddr *src, struct sockaddr *dst, u_int32_t spi, u_int32_t reqid, |
| 1023 | u_int wsize, caddr_t keymat, u_int e_type, u_int e_keylen, u_int a_type, |
| 1024 | u_int a_keylen, u_int flags,u_int32_t l_alloc, u_int32_t l_bytes, |
| 1025 | u_int32_t l_addtime, u_int32_t l_usetime, u_int32_t seq) |
| 1026 | { |
| 1027 | struct sadb_msg *newmsg; |
| 1028 | int len; |
| 1029 | caddr_t p; |
| 1030 | int plen; |
| 1031 | caddr_t ep; |
| 1032 | |
| 1033 | /* validity check */ |
| 1034 | if (src == NULL || dst == NULL) { |
| 1035 | __ipsec_errcode = EIPSEC_INVAL_ARGUMENT; |
| 1036 | return -1; |
| 1037 | } |
| 1038 | if (src->sa_family != dst->sa_family) { |
| 1039 | __ipsec_errcode = EIPSEC_FAMILY_MISMATCH; |
| 1040 | return -1; |
| 1041 | } |
| 1042 | switch (src->sa_family) { |
| 1043 | case AF_INET: |
| 1044 | plen = sizeof(struct in_addr) << 3; |
| 1045 | break; |
| 1046 | case AF_INET6: |
| 1047 | plen = sizeof(struct in6_addr) << 3; |
| 1048 | break; |
| 1049 | default: |
| 1050 | __ipsec_errcode = EIPSEC_INVAL_FAMILY; |
| 1051 | return -1; |
| 1052 | } |
| 1053 | |
| 1054 | switch (satype) { |
| 1055 | case SADB_SATYPE_ESP: |
| 1056 | if (e_type == SADB_EALG_NONE) { |
| 1057 | __ipsec_errcode = EIPSEC_NO_ALGS; |
| 1058 | return -1; |
| 1059 | } |
| 1060 | break; |
| 1061 | case SADB_SATYPE_AH: |
| 1062 | if (e_type != SADB_EALG_NONE) { |
| 1063 | __ipsec_errcode = EIPSEC_INVAL_ALGS; |
| 1064 | return -1; |
| 1065 | } |
| 1066 | if (a_type == SADB_AALG_NONE) { |
| 1067 | __ipsec_errcode = EIPSEC_NO_ALGS; |
| 1068 | return -1; |
| 1069 | } |
| 1070 | break; |
| 1071 | case SADB_X_SATYPE_IPCOMP: |
| 1072 | if (e_type == SADB_X_CALG_NONE) { |
| 1073 | __ipsec_errcode = EIPSEC_INVAL_ALGS; |
| 1074 | return -1; |
| 1075 | } |
| 1076 | if (a_type != SADB_AALG_NONE) { |
| 1077 | __ipsec_errcode = EIPSEC_NO_ALGS; |
| 1078 | return -1; |
| 1079 | } |
| 1080 | break; |
| 1081 | case SADB_X_SATYPE_TCPSIGNATURE: |
| 1082 | if (e_type != SADB_EALG_NONE) { |
| 1083 | __ipsec_errcode = EIPSEC_INVAL_ALGS; |
| 1084 | return -1; |
| 1085 | } |
| 1086 | if (a_type != SADB_X_AALG_TCP_MD5) { |
| 1087 | __ipsec_errcode = EIPSEC_INVAL_ALGS; |
| 1088 | return -1; |
| 1089 | } |
| 1090 | break; |
| 1091 | default: |
| 1092 | __ipsec_errcode = EIPSEC_INVAL_SATYPE; |
| 1093 | return -1; |
| 1094 | } |
| 1095 | |
| 1096 | /* create new sadb_msg to reply. */ |
| 1097 | len = sizeof(struct sadb_msg) |
| 1098 | + sizeof(struct sadb_sa) |
| 1099 | + sizeof(struct sadb_x_sa2) |
| 1100 | + sizeof(struct sadb_address) |
| 1101 | + PFKEY_ALIGN8(src->sa_len) |
| 1102 | + sizeof(struct sadb_address) |
| 1103 | + PFKEY_ALIGN8(dst->sa_len) |
| 1104 | + sizeof(struct sadb_lifetime) |
| 1105 | + sizeof(struct sadb_lifetime); |
| 1106 | |
| 1107 | if (e_type != SADB_EALG_NONE) |
| 1108 | len += (sizeof(struct sadb_key) + PFKEY_ALIGN8(e_keylen)); |
| 1109 | if (a_type != SADB_AALG_NONE) |
| 1110 | len += (sizeof(struct sadb_key) + PFKEY_ALIGN8(a_keylen)); |
| 1111 | |
| 1112 | if ((newmsg = CALLOC(len, struct sadb_msg *)) == NULL) { |
| 1113 | __ipsec_set_strerror(strerror(errno)); |
| 1114 | return -1; |
| 1115 | } |
| 1116 | ep = ((caddr_t)newmsg) + len; |
| 1117 | |
| 1118 | p = pfkey_setsadbmsg((caddr_t)newmsg, ep, type, len, |
| 1119 | satype, seq, getpid()); |
| 1120 | if (!p) { |
| 1121 | free(newmsg); |
| 1122 | return -1; |
| 1123 | } |
| 1124 | p = pfkey_setsadbsa(p, ep, spi, wsize, a_type, e_type, flags); |
| 1125 | if (!p) { |
| 1126 | free(newmsg); |
| 1127 | return -1; |
| 1128 | } |
| 1129 | p = pfkey_setsadbxsa2(p, ep, mode, reqid); |
| 1130 | if (!p) { |
| 1131 | free(newmsg); |
| 1132 | return -1; |
| 1133 | } |
| 1134 | p = pfkey_setsadbaddr(p, ep, SADB_EXT_ADDRESS_SRC, src, plen, |
| 1135 | IPSEC_ULPROTO_ANY); |
| 1136 | if (!p) { |
| 1137 | free(newmsg); |
| 1138 | return -1; |
| 1139 | } |
| 1140 | p = pfkey_setsadbaddr(p, ep, SADB_EXT_ADDRESS_DST, dst, plen, |
| 1141 | IPSEC_ULPROTO_ANY); |
| 1142 | if (!p) { |
| 1143 | free(newmsg); |
| 1144 | return -1; |
| 1145 | } |
| 1146 | |
| 1147 | if (e_type != SADB_EALG_NONE) { |
| 1148 | p = pfkey_setsadbkey(p, ep, SADB_EXT_KEY_ENCRYPT, |
| 1149 | keymat, e_keylen); |
| 1150 | if (!p) { |
| 1151 | free(newmsg); |
| 1152 | return -1; |
| 1153 | } |
| 1154 | } |
| 1155 | if (a_type != SADB_AALG_NONE) { |
| 1156 | p = pfkey_setsadbkey(p, ep, SADB_EXT_KEY_AUTH, |
| 1157 | keymat + e_keylen, a_keylen); |
| 1158 | if (!p) { |
| 1159 | free(newmsg); |
| 1160 | return -1; |
| 1161 | } |
| 1162 | } |
| 1163 | |
| 1164 | /* set sadb_lifetime for destination */ |
| 1165 | p = pfkey_setsadblifetime(p, ep, SADB_EXT_LIFETIME_HARD, |
| 1166 | l_alloc, l_bytes, l_addtime, l_usetime); |
| 1167 | if (!p) { |
| 1168 | free(newmsg); |
| 1169 | return -1; |
| 1170 | } |
| 1171 | p = pfkey_setsadblifetime(p, ep, SADB_EXT_LIFETIME_SOFT, |
| 1172 | l_alloc, l_bytes, l_addtime, l_usetime); |
| 1173 | if (!p || p != ep) { |
| 1174 | free(newmsg); |
| 1175 | return -1; |
| 1176 | } |
| 1177 | |
| 1178 | /* send message */ |
| 1179 | len = pfkey_send(so, newmsg, len); |
| 1180 | free(newmsg); |
| 1181 | |
| 1182 | if (len < 0) |
| 1183 | return -1; |
| 1184 | |
| 1185 | __ipsec_errcode = EIPSEC_NO_ERROR; |
| 1186 | return len; |
| 1187 | } |
| 1188 | |
| 1189 | /* sending SADB_DELETE or SADB_GET message to the kernel */ |
| 1190 | static int |
| 1191 | pfkey_send_x2(int so, u_int type, u_int satype, u_int mode, |
| 1192 | struct sockaddr *src, struct sockaddr *dst, u_int32_t spi) |
| 1193 | { |
| 1194 | struct sadb_msg *newmsg; |
| 1195 | int len; |
| 1196 | caddr_t p; |
| 1197 | int plen; |
| 1198 | caddr_t ep; |
| 1199 | |
| 1200 | /* validity check */ |
| 1201 | if (src == NULL || dst == NULL) { |
| 1202 | __ipsec_errcode = EIPSEC_INVAL_ARGUMENT; |
| 1203 | return -1; |
| 1204 | } |
| 1205 | if (src->sa_family != dst->sa_family) { |
| 1206 | __ipsec_errcode = EIPSEC_FAMILY_MISMATCH; |
| 1207 | return -1; |
| 1208 | } |
| 1209 | switch (src->sa_family) { |
| 1210 | case AF_INET: |
| 1211 | plen = sizeof(struct in_addr) << 3; |
| 1212 | break; |
| 1213 | case AF_INET6: |
| 1214 | plen = sizeof(struct in6_addr) << 3; |
| 1215 | break; |
| 1216 | default: |
| 1217 | __ipsec_errcode = EIPSEC_INVAL_FAMILY; |
| 1218 | return -1; |
| 1219 | } |
| 1220 | |
| 1221 | /* create new sadb_msg to reply. */ |
| 1222 | len = sizeof(struct sadb_msg) |
| 1223 | + sizeof(struct sadb_sa) |
| 1224 | + sizeof(struct sadb_address) |
| 1225 | + PFKEY_ALIGN8(src->sa_len) |
| 1226 | + sizeof(struct sadb_address) |
| 1227 | + PFKEY_ALIGN8(dst->sa_len); |
| 1228 | |
| 1229 | if ((newmsg = CALLOC(len, struct sadb_msg *)) == NULL) { |
| 1230 | __ipsec_set_strerror(strerror(errno)); |
| 1231 | return -1; |
| 1232 | } |
| 1233 | ep = ((caddr_t)newmsg) + len; |
| 1234 | |
| 1235 | p = pfkey_setsadbmsg((caddr_t)newmsg, ep, type, len, satype, 0, |
| 1236 | getpid()); |
| 1237 | if (!p) { |
| 1238 | free(newmsg); |
| 1239 | return -1; |
| 1240 | } |
| 1241 | p = pfkey_setsadbsa(p, ep, spi, 0, 0, 0, 0); |
| 1242 | if (!p) { |
| 1243 | free(newmsg); |
| 1244 | return -1; |
| 1245 | } |
| 1246 | p = pfkey_setsadbaddr(p, ep, SADB_EXT_ADDRESS_SRC, src, plen, |
| 1247 | IPSEC_ULPROTO_ANY); |
| 1248 | if (!p) { |
| 1249 | free(newmsg); |
| 1250 | return -1; |
| 1251 | } |
| 1252 | p = pfkey_setsadbaddr(p, ep, SADB_EXT_ADDRESS_DST, dst, plen, |
| 1253 | IPSEC_ULPROTO_ANY); |
| 1254 | if (!p || p != ep) { |
| 1255 | free(newmsg); |
| 1256 | return -1; |
| 1257 | } |
| 1258 | |
| 1259 | /* send message */ |
| 1260 | len = pfkey_send(so, newmsg, len); |
| 1261 | free(newmsg); |
| 1262 | |
| 1263 | if (len < 0) |
| 1264 | return -1; |
| 1265 | |
| 1266 | __ipsec_errcode = EIPSEC_NO_ERROR; |
| 1267 | return len; |
| 1268 | } |
| 1269 | |
| 1270 | /* |
| 1271 | * sending SADB_REGISTER, SADB_FLUSH, SADB_DUMP or SADB_X_PROMISC message |
| 1272 | * to the kernel |
| 1273 | */ |
| 1274 | static int |
| 1275 | pfkey_send_x3(int so, u_int type, u_int satype) |
| 1276 | { |
| 1277 | struct sadb_msg *newmsg; |
| 1278 | int len; |
| 1279 | caddr_t p; |
| 1280 | caddr_t ep; |
| 1281 | |
| 1282 | /* validity check */ |
| 1283 | switch (type) { |
| 1284 | case SADB_X_PROMISC: |
| 1285 | if (satype != 0 && satype != 1) { |
| 1286 | __ipsec_errcode = EIPSEC_INVAL_SATYPE; |
| 1287 | return -1; |
| 1288 | } |
| 1289 | break; |
| 1290 | default: |
| 1291 | switch (satype) { |
| 1292 | case SADB_SATYPE_UNSPEC: |
| 1293 | case SADB_SATYPE_AH: |
| 1294 | case SADB_SATYPE_ESP: |
| 1295 | case SADB_X_SATYPE_IPCOMP: |
| 1296 | case SADB_X_SATYPE_TCPSIGNATURE: |
| 1297 | break; |
| 1298 | default: |
| 1299 | __ipsec_errcode = EIPSEC_INVAL_SATYPE; |
| 1300 | return -1; |
| 1301 | } |
| 1302 | } |
| 1303 | |
| 1304 | /* create new sadb_msg to send. */ |
| 1305 | len = sizeof(struct sadb_msg); |
| 1306 | |
| 1307 | if ((newmsg = CALLOC(len, struct sadb_msg *)) == NULL) { |
| 1308 | __ipsec_set_strerror(strerror(errno)); |
| 1309 | return -1; |
| 1310 | } |
| 1311 | ep = ((caddr_t)newmsg) + len; |
| 1312 | |
| 1313 | p = pfkey_setsadbmsg((caddr_t)newmsg, ep, type, len, satype, 0, |
| 1314 | getpid()); |
| 1315 | if (!p || p != ep) { |
| 1316 | free(newmsg); |
| 1317 | return -1; |
| 1318 | } |
| 1319 | |
| 1320 | /* send message */ |
| 1321 | len = pfkey_send(so, newmsg, len); |
| 1322 | free(newmsg); |
| 1323 | |
| 1324 | if (len < 0) |
| 1325 | return -1; |
| 1326 | |
| 1327 | __ipsec_errcode = EIPSEC_NO_ERROR; |
| 1328 | return len; |
| 1329 | } |
| 1330 | |
| 1331 | /* sending SADB_X_SPDADD message to the kernel */ |
| 1332 | static int |
| 1333 | pfkey_send_x4(int so, u_int type, struct sockaddr *src, u_int prefs, |
| 1334 | struct sockaddr *dst, u_int prefd, u_int proto, u_int64_t ltime, |
| 1335 | u_int64_t vtime, char *policy, int policylen, u_int32_t seq) |
| 1336 | { |
| 1337 | struct sadb_msg *newmsg; |
| 1338 | int len; |
| 1339 | caddr_t p; |
| 1340 | int plen; |
| 1341 | caddr_t ep; |
| 1342 | |
| 1343 | /* validity check */ |
| 1344 | if (src == NULL || dst == NULL) { |
| 1345 | __ipsec_errcode = EIPSEC_INVAL_ARGUMENT; |
| 1346 | return -1; |
| 1347 | } |
| 1348 | if (src->sa_family != dst->sa_family) { |
| 1349 | __ipsec_errcode = EIPSEC_FAMILY_MISMATCH; |
| 1350 | return -1; |
| 1351 | } |
| 1352 | |
| 1353 | switch (src->sa_family) { |
| 1354 | case AF_INET: |
| 1355 | plen = sizeof(struct in_addr) << 3; |
| 1356 | break; |
| 1357 | case AF_INET6: |
| 1358 | plen = sizeof(struct in6_addr) << 3; |
| 1359 | break; |
| 1360 | default: |
| 1361 | __ipsec_errcode = EIPSEC_INVAL_FAMILY; |
| 1362 | return -1; |
| 1363 | } |
| 1364 | if (prefs > plen || prefd > plen) { |
| 1365 | __ipsec_errcode = EIPSEC_INVAL_PREFIXLEN; |
| 1366 | return -1; |
| 1367 | } |
| 1368 | |
| 1369 | /* create new sadb_msg to reply. */ |
| 1370 | len = sizeof(struct sadb_msg) |
| 1371 | + sizeof(struct sadb_address) |
| 1372 | + PFKEY_ALIGN8(src->sa_len) |
| 1373 | + sizeof(struct sadb_address) |
| 1374 | + PFKEY_ALIGN8(src->sa_len) |
| 1375 | + sizeof(struct sadb_lifetime) |
| 1376 | + policylen; |
| 1377 | |
| 1378 | if ((newmsg = CALLOC(len, struct sadb_msg *)) == NULL) { |
| 1379 | __ipsec_set_strerror(strerror(errno)); |
| 1380 | return -1; |
| 1381 | } |
| 1382 | ep = ((caddr_t)newmsg) + len; |
| 1383 | |
| 1384 | p = pfkey_setsadbmsg((caddr_t)newmsg, ep, type, len, |
| 1385 | SADB_SATYPE_UNSPEC, seq, getpid()); |
| 1386 | if (!p) { |
| 1387 | free(newmsg); |
| 1388 | return -1; |
| 1389 | } |
| 1390 | p = pfkey_setsadbaddr(p, ep, SADB_EXT_ADDRESS_SRC, src, prefs, proto); |
| 1391 | if (!p) { |
| 1392 | free(newmsg); |
| 1393 | return -1; |
| 1394 | } |
| 1395 | p = pfkey_setsadbaddr(p, ep, SADB_EXT_ADDRESS_DST, dst, prefd, proto); |
| 1396 | if (!p) { |
| 1397 | free(newmsg); |
| 1398 | return -1; |
| 1399 | } |
| 1400 | p = pfkey_setsadblifetime(p, ep, SADB_EXT_LIFETIME_HARD, |
| 1401 | 0, 0, ltime, vtime); |
| 1402 | if (!p || p + policylen != ep) { |
| 1403 | free(newmsg); |
| 1404 | return -1; |
| 1405 | } |
| 1406 | memcpy(p, policy, policylen); |
| 1407 | |
| 1408 | /* send message */ |
| 1409 | len = pfkey_send(so, newmsg, len); |
| 1410 | free(newmsg); |
| 1411 | |
| 1412 | if (len < 0) |
| 1413 | return -1; |
| 1414 | |
| 1415 | __ipsec_errcode = EIPSEC_NO_ERROR; |
| 1416 | return len; |
| 1417 | } |
| 1418 | |
| 1419 | /* sending SADB_X_SPDGET or SADB_X_SPDDELETE message to the kernel */ |
| 1420 | static int |
| 1421 | pfkey_send_x5(int so, u_int type, u_int32_t spid) |
| 1422 | { |
| 1423 | struct sadb_msg *newmsg; |
| 1424 | struct sadb_x_policy xpl; |
| 1425 | int len; |
| 1426 | caddr_t p; |
| 1427 | caddr_t ep; |
| 1428 | |
| 1429 | /* create new sadb_msg to reply. */ |
| 1430 | len = sizeof(struct sadb_msg) |
| 1431 | + sizeof(xpl); |
| 1432 | |
| 1433 | if ((newmsg = CALLOC(len, struct sadb_msg *)) == NULL) { |
| 1434 | __ipsec_set_strerror(strerror(errno)); |
| 1435 | return -1; |
| 1436 | } |
| 1437 | ep = ((caddr_t)newmsg) + len; |
| 1438 | |
| 1439 | p = pfkey_setsadbmsg((caddr_t)newmsg, ep, type, len, |
| 1440 | SADB_SATYPE_UNSPEC, 0, getpid()); |
| 1441 | if (!p) { |
| 1442 | free(newmsg); |
| 1443 | return -1; |
| 1444 | } |
| 1445 | |
| 1446 | if (p + sizeof(xpl) != ep) { |
| 1447 | free(newmsg); |
| 1448 | return -1; |
| 1449 | } |
| 1450 | memset(&xpl, 0, sizeof(xpl)); |
| 1451 | xpl.sadb_x_policy_len = PFKEY_UNUNIT64(sizeof(xpl)); |
| 1452 | xpl.sadb_x_policy_exttype = SADB_X_EXT_POLICY; |
| 1453 | xpl.sadb_x_policy_id = spid; |
| 1454 | memcpy(p, &xpl, sizeof(xpl)); |
| 1455 | |
| 1456 | /* send message */ |
| 1457 | len = pfkey_send(so, newmsg, len); |
| 1458 | free(newmsg); |
| 1459 | |
| 1460 | if (len < 0) |
| 1461 | return -1; |
| 1462 | |
| 1463 | __ipsec_errcode = EIPSEC_NO_ERROR; |
| 1464 | return len; |
| 1465 | } |
| 1466 | |
| 1467 | /* |
| 1468 | * open a socket. |
| 1469 | * OUT: |
| 1470 | * -1: fail. |
| 1471 | * others : success and return value of socket. |
| 1472 | */ |
| 1473 | int |
| 1474 | pfkey_open(void) |
| 1475 | { |
| 1476 | int so; |
| 1477 | const int bufsiz = 128 * 1024; /*is 128K enough?*/ |
| 1478 | |
| 1479 | if ((so = socket(PF_KEY, SOCK_RAW, PF_KEY_V2)) < 0) { |
| 1480 | __ipsec_set_strerror(strerror(errno)); |
| 1481 | return -1; |
| 1482 | } |
| 1483 | |
| 1484 | /* |
| 1485 | * This is a temporary workaround for KAME PR 154. |
| 1486 | * Don't really care even if it fails. |
| 1487 | */ |
| 1488 | (void)setsockopt(so, SOL_SOCKET, SO_SNDBUF, &bufsiz, sizeof(bufsiz)); |
| 1489 | (void)setsockopt(so, SOL_SOCKET, SO_RCVBUF, &bufsiz, sizeof(bufsiz)); |
| 1490 | |
| 1491 | __ipsec_errcode = EIPSEC_NO_ERROR; |
| 1492 | return so; |
| 1493 | } |
| 1494 | |
| 1495 | /* |
| 1496 | * close a socket. |
| 1497 | * OUT: |
| 1498 | * 0: success. |
| 1499 | * -1: fail. |
| 1500 | */ |
| 1501 | void |
| 1502 | pfkey_close(int so) |
| 1503 | { |
| 1504 | (void)close(so); |
| 1505 | |
| 1506 | __ipsec_errcode = EIPSEC_NO_ERROR; |
| 1507 | return; |
| 1508 | } |
| 1509 | |
| 1510 | /* |
| 1511 | * receive sadb_msg data, and return pointer to new buffer allocated. |
| 1512 | * Must free this buffer later. |
| 1513 | * OUT: |
| 1514 | * NULL : error occured. |
| 1515 | * others : a pointer to sadb_msg structure. |
| 1516 | * |
| 1517 | * XXX should be rewritten to pass length explicitly |
| 1518 | */ |
| 1519 | struct sadb_msg * |
| 1520 | pfkey_recv(int so) |
| 1521 | { |
| 1522 | struct sadb_msg buf, *newmsg; |
| 1523 | int len, reallen; |
| 1524 | |
| 1525 | while ((len = recv(so, (caddr_t)&buf, sizeof(buf), MSG_PEEK)) < 0) { |
| 1526 | if (errno == EINTR) |
| 1527 | continue; |
| 1528 | __ipsec_set_strerror(strerror(errno)); |
| 1529 | return NULL; |
| 1530 | } |
| 1531 | |
| 1532 | if (len < sizeof(buf)) { |
| 1533 | recv(so, (caddr_t)&buf, sizeof(buf), 0); |
| 1534 | __ipsec_errcode = EIPSEC_MAX; |
| 1535 | return NULL; |
| 1536 | } |
| 1537 | |
| 1538 | /* read real message */ |
| 1539 | reallen = PFKEY_UNUNIT64(buf.sadb_msg_len); |
| 1540 | if ((newmsg = CALLOC(reallen, struct sadb_msg *)) == NULL) { |
| 1541 | __ipsec_set_strerror(strerror(errno)); |
| 1542 | return NULL; |
| 1543 | } |
| 1544 | |
| 1545 | while ((len = recv(so, (caddr_t)newmsg, reallen, 0)) < 0) { |
| 1546 | if (errno == EINTR) |
| 1547 | continue; |
| 1548 | __ipsec_set_strerror(strerror(errno)); |
| 1549 | free(newmsg); |
| 1550 | return NULL; |
| 1551 | } |
| 1552 | |
| 1553 | if (len != reallen) { |
| 1554 | __ipsec_errcode = EIPSEC_SYSTEM_ERROR; |
| 1555 | free(newmsg); |
| 1556 | return NULL; |
| 1557 | } |
| 1558 | |
| 1559 | /* don't trust what the kernel says, validate! */ |
| 1560 | if (PFKEY_UNUNIT64(newmsg->sadb_msg_len) != len) { |
| 1561 | __ipsec_errcode = EIPSEC_SYSTEM_ERROR; |
| 1562 | free(newmsg); |
| 1563 | return NULL; |
| 1564 | } |
| 1565 | |
| 1566 | __ipsec_errcode = EIPSEC_NO_ERROR; |
| 1567 | return newmsg; |
| 1568 | } |
| 1569 | |
| 1570 | /* |
| 1571 | * send message to a socket. |
| 1572 | * OUT: |
| 1573 | * others: success and return length sent. |
| 1574 | * -1 : fail. |
| 1575 | */ |
| 1576 | int |
| 1577 | pfkey_send(int so, struct sadb_msg *msg, int len) |
| 1578 | { |
| 1579 | if ((len = send(so, (caddr_t)msg, len, 0)) < 0) { |
| 1580 | __ipsec_set_strerror(strerror(errno)); |
| 1581 | return -1; |
| 1582 | } |
| 1583 | |
| 1584 | __ipsec_errcode = EIPSEC_NO_ERROR; |
| 1585 | return len; |
| 1586 | } |
| 1587 | |
| 1588 | /* |
| 1589 | * %%% Utilities |
| 1590 | * NOTE: These functions are derived from netkey/key.c in KAME. |
| 1591 | */ |
| 1592 | /* |
| 1593 | * set the pointer to each header in this message buffer. |
| 1594 | * IN: msg: pointer to message buffer. |
| 1595 | * mhp: pointer to the buffer initialized like below: |
| 1596 | * caddr_t mhp[SADB_EXT_MAX + 1]; |
| 1597 | * OUT: -1: invalid. |
| 1598 | * 0: valid. |
| 1599 | * |
| 1600 | * XXX should be rewritten to obtain length explicitly |
| 1601 | */ |
| 1602 | int |
| 1603 | pfkey_align(struct sadb_msg *msg, caddr_t *mhp) |
| 1604 | { |
| 1605 | struct sadb_ext *ext; |
| 1606 | int i; |
| 1607 | caddr_t p; |
| 1608 | caddr_t ep; /* XXX should be passed from upper layer */ |
| 1609 | |
| 1610 | /* validity check */ |
| 1611 | if (msg == NULL || mhp == NULL) { |
| 1612 | __ipsec_errcode = EIPSEC_INVAL_ARGUMENT; |
| 1613 | return -1; |
| 1614 | } |
| 1615 | |
| 1616 | /* initialize */ |
| 1617 | for (i = 0; i < SADB_EXT_MAX + 1; i++) |
| 1618 | mhp[i] = NULL; |
| 1619 | |
| 1620 | mhp[0] = (caddr_t)msg; |
| 1621 | |
| 1622 | /* initialize */ |
| 1623 | p = (caddr_t) msg; |
| 1624 | ep = p + PFKEY_UNUNIT64(msg->sadb_msg_len); |
| 1625 | |
| 1626 | /* skip base header */ |
| 1627 | p += sizeof(struct sadb_msg); |
| 1628 | |
| 1629 | while (p < ep) { |
| 1630 | ext = (struct sadb_ext *)p; |
| 1631 | if (ep < p + sizeof(*ext) || PFKEY_EXTLEN(ext) < sizeof(*ext) || |
| 1632 | ep < p + PFKEY_EXTLEN(ext)) { |
| 1633 | /* invalid format */ |
| 1634 | break; |
| 1635 | } |
| 1636 | |
| 1637 | /* duplicate check */ |
| 1638 | /* XXX Are there duplication either KEY_AUTH or KEY_ENCRYPT ?*/ |
| 1639 | if (mhp[ext->sadb_ext_type] != NULL) { |
| 1640 | __ipsec_errcode = EIPSEC_INVAL_EXTTYPE; |
| 1641 | return -1; |
| 1642 | } |
| 1643 | |
| 1644 | /* set pointer */ |
| 1645 | switch (ext->sadb_ext_type) { |
| 1646 | case SADB_EXT_SA: |
| 1647 | case SADB_EXT_LIFETIME_CURRENT: |
| 1648 | case SADB_EXT_LIFETIME_HARD: |
| 1649 | case SADB_EXT_LIFETIME_SOFT: |
| 1650 | case SADB_EXT_ADDRESS_SRC: |
| 1651 | case SADB_EXT_ADDRESS_DST: |
| 1652 | case SADB_EXT_ADDRESS_PROXY: |
| 1653 | case SADB_EXT_KEY_AUTH: |
| 1654 | /* XXX should to be check weak keys. */ |
| 1655 | case SADB_EXT_KEY_ENCRYPT: |
| 1656 | /* XXX should to be check weak keys. */ |
| 1657 | case SADB_EXT_IDENTITY_SRC: |
| 1658 | case SADB_EXT_IDENTITY_DST: |
| 1659 | case SADB_EXT_SENSITIVITY: |
| 1660 | case SADB_EXT_PROPOSAL: |
| 1661 | case SADB_EXT_SUPPORTED_AUTH: |
| 1662 | case SADB_EXT_SUPPORTED_ENCRYPT: |
| 1663 | case SADB_EXT_SPIRANGE: |
| 1664 | case SADB_X_EXT_POLICY: |
| 1665 | case SADB_X_EXT_SA2: |
| 1666 | mhp[ext->sadb_ext_type] = (caddr_t)ext; |
| 1667 | break; |
| 1668 | default: |
| 1669 | __ipsec_errcode = EIPSEC_INVAL_EXTTYPE; |
| 1670 | return -1; |
| 1671 | } |
| 1672 | |
| 1673 | p += PFKEY_EXTLEN(ext); |
| 1674 | } |
| 1675 | |
| 1676 | if (p != ep) { |
| 1677 | __ipsec_errcode = EIPSEC_INVAL_SADBMSG; |
| 1678 | return -1; |
| 1679 | } |
| 1680 | |
| 1681 | __ipsec_errcode = EIPSEC_NO_ERROR; |
| 1682 | return 0; |
| 1683 | } |
| 1684 | |
| 1685 | /* |
| 1686 | * check basic usage for sadb_msg, |
| 1687 | * NOTE: This routine is derived from netkey/key.c in KAME. |
| 1688 | * IN: msg: pointer to message buffer. |
| 1689 | * mhp: pointer to the buffer initialized like below: |
| 1690 | * |
| 1691 | * caddr_t mhp[SADB_EXT_MAX + 1]; |
| 1692 | * |
| 1693 | * OUT: -1: invalid. |
| 1694 | * 0: valid. |
| 1695 | */ |
| 1696 | int |
| 1697 | pfkey_check(caddr_t *mhp) |
| 1698 | { |
| 1699 | struct sadb_msg *msg; |
| 1700 | |
| 1701 | /* validity check */ |
| 1702 | if (mhp == NULL || mhp[0] == NULL) { |
| 1703 | __ipsec_errcode = EIPSEC_INVAL_ARGUMENT; |
| 1704 | return -1; |
| 1705 | } |
| 1706 | |
| 1707 | msg = (struct sadb_msg *)mhp[0]; |
| 1708 | |
| 1709 | /* check version */ |
| 1710 | if (msg->sadb_msg_version != PF_KEY_V2) { |
| 1711 | __ipsec_errcode = EIPSEC_INVAL_VERSION; |
| 1712 | return -1; |
| 1713 | } |
| 1714 | |
| 1715 | /* check type */ |
| 1716 | if (msg->sadb_msg_type > SADB_MAX) { |
| 1717 | __ipsec_errcode = EIPSEC_INVAL_MSGTYPE; |
| 1718 | return -1; |
| 1719 | } |
| 1720 | |
| 1721 | /* check SA type */ |
| 1722 | switch (msg->sadb_msg_satype) { |
| 1723 | case SADB_SATYPE_UNSPEC: |
| 1724 | switch (msg->sadb_msg_type) { |
| 1725 | case SADB_GETSPI: |
| 1726 | case SADB_UPDATE: |
| 1727 | case SADB_ADD: |
| 1728 | case SADB_DELETE: |
| 1729 | case SADB_GET: |
| 1730 | case SADB_ACQUIRE: |
| 1731 | case SADB_EXPIRE: |
| 1732 | __ipsec_errcode = EIPSEC_INVAL_SATYPE; |
| 1733 | return -1; |
| 1734 | } |
| 1735 | break; |
| 1736 | case SADB_SATYPE_ESP: |
| 1737 | case SADB_SATYPE_AH: |
| 1738 | case SADB_X_SATYPE_IPCOMP: |
| 1739 | case SADB_X_SATYPE_TCPSIGNATURE: |
| 1740 | switch (msg->sadb_msg_type) { |
| 1741 | case SADB_X_SPDADD: |
| 1742 | case SADB_X_SPDDELETE: |
| 1743 | case SADB_X_SPDGET: |
| 1744 | case SADB_X_SPDDUMP: |
| 1745 | case SADB_X_SPDFLUSH: |
| 1746 | __ipsec_errcode = EIPSEC_INVAL_SATYPE; |
| 1747 | return -1; |
| 1748 | } |
| 1749 | break; |
| 1750 | case SADB_SATYPE_RSVP: |
| 1751 | case SADB_SATYPE_OSPFV2: |
| 1752 | case SADB_SATYPE_RIPV2: |
| 1753 | case SADB_SATYPE_MIP: |
| 1754 | __ipsec_errcode = EIPSEC_NOT_SUPPORTED; |
| 1755 | return -1; |
| 1756 | case 1: /* XXX: What does it do ? */ |
| 1757 | if (msg->sadb_msg_type == SADB_X_PROMISC) |
| 1758 | break; |
| 1759 | /*FALLTHROUGH*/ |
| 1760 | default: |
| 1761 | __ipsec_errcode = EIPSEC_INVAL_SATYPE; |
| 1762 | return -1; |
| 1763 | } |
| 1764 | |
| 1765 | /* check field of upper layer protocol and address family */ |
| 1766 | if (mhp[SADB_EXT_ADDRESS_SRC] != NULL |
| 1767 | && mhp[SADB_EXT_ADDRESS_DST] != NULL) { |
| 1768 | struct sadb_address *src0, *dst0; |
| 1769 | |
| 1770 | src0 = (struct sadb_address *)(mhp[SADB_EXT_ADDRESS_SRC]); |
| 1771 | dst0 = (struct sadb_address *)(mhp[SADB_EXT_ADDRESS_DST]); |
| 1772 | |
| 1773 | if (src0->sadb_address_proto != dst0->sadb_address_proto) { |
| 1774 | __ipsec_errcode = EIPSEC_PROTO_MISMATCH; |
| 1775 | return -1; |
| 1776 | } |
| 1777 | |
| 1778 | if (PFKEY_ADDR_SADDR(src0)->sa_family |
| 1779 | != PFKEY_ADDR_SADDR(dst0)->sa_family) { |
| 1780 | __ipsec_errcode = EIPSEC_FAMILY_MISMATCH; |
| 1781 | return -1; |
| 1782 | } |
| 1783 | |
| 1784 | switch (PFKEY_ADDR_SADDR(src0)->sa_family) { |
| 1785 | case AF_INET: |
| 1786 | case AF_INET6: |
| 1787 | break; |
| 1788 | default: |
| 1789 | __ipsec_errcode = EIPSEC_INVAL_FAMILY; |
| 1790 | return -1; |
| 1791 | } |
| 1792 | |
| 1793 | /* |
| 1794 | * prefixlen == 0 is valid because there must be the case |
| 1795 | * all addresses are matched. |
| 1796 | */ |
| 1797 | } |
| 1798 | |
| 1799 | __ipsec_errcode = EIPSEC_NO_ERROR; |
| 1800 | return 0; |
| 1801 | } |
| 1802 | |
| 1803 | /* |
| 1804 | * set data into sadb_msg. |
| 1805 | * `buf' must has been allocated sufficiently. |
| 1806 | */ |
| 1807 | static caddr_t |
| 1808 | pfkey_setsadbmsg(caddr_t buf, caddr_t lim, u_int type, u_int tlen, |
| 1809 | u_int satype, u_int32_t seq, pid_t pid) |
| 1810 | { |
| 1811 | struct sadb_msg *p; |
| 1812 | u_int len; |
| 1813 | |
| 1814 | p = (struct sadb_msg *)buf; |
| 1815 | len = sizeof(struct sadb_msg); |
| 1816 | |
| 1817 | if (buf + len > lim) |
| 1818 | return NULL; |
| 1819 | |
| 1820 | memset(p, 0, len); |
| 1821 | p->sadb_msg_version = PF_KEY_V2; |
| 1822 | p->sadb_msg_type = type; |
| 1823 | p->sadb_msg_errno = 0; |
| 1824 | p->sadb_msg_satype = satype; |
| 1825 | p->sadb_msg_len = PFKEY_UNIT64(tlen); |
| 1826 | p->sadb_msg_reserved = 0; |
| 1827 | p->sadb_msg_seq = seq; |
| 1828 | p->sadb_msg_pid = (u_int32_t)pid; |
| 1829 | |
| 1830 | return(buf + len); |
| 1831 | } |
| 1832 | |
| 1833 | /* |
| 1834 | * copy secasvar data into sadb_address. |
| 1835 | * `buf' must has been allocated sufficiently. |
| 1836 | */ |
| 1837 | static caddr_t |
| 1838 | pfkey_setsadbsa(caddr_t buf, caddr_t lim, u_int32_t spi, u_int wsize, |
| 1839 | u_int auth, u_int enc, u_int32_t flags) |
| 1840 | { |
| 1841 | struct sadb_sa *p; |
| 1842 | u_int len; |
| 1843 | |
| 1844 | p = (struct sadb_sa *)buf; |
| 1845 | len = sizeof(struct sadb_sa); |
| 1846 | |
| 1847 | if (buf + len > lim) |
| 1848 | return NULL; |
| 1849 | |
| 1850 | memset(p, 0, len); |
| 1851 | p->sadb_sa_len = PFKEY_UNIT64(len); |
| 1852 | p->sadb_sa_exttype = SADB_EXT_SA; |
| 1853 | p->sadb_sa_spi = spi; |
| 1854 | p->sadb_sa_replay = wsize; |
| 1855 | p->sadb_sa_state = SADB_SASTATE_LARVAL; |
| 1856 | p->sadb_sa_auth = auth; |
| 1857 | p->sadb_sa_encrypt = enc; |
| 1858 | p->sadb_sa_flags = flags; |
| 1859 | |
| 1860 | return(buf + len); |
| 1861 | } |
| 1862 | |
| 1863 | /* |
| 1864 | * set data into sadb_address. |
| 1865 | * `buf' must has been allocated sufficiently. |
| 1866 | * prefixlen is in bits. |
| 1867 | */ |
| 1868 | static caddr_t |
| 1869 | pfkey_setsadbaddr(caddr_t buf, caddr_t lim, u_int exttype, |
| 1870 | struct sockaddr *saddr, u_int prefixlen, u_int ul_proto) |
| 1871 | { |
| 1872 | struct sadb_address *p; |
| 1873 | u_int len; |
| 1874 | |
| 1875 | p = (struct sadb_address *)buf; |
| 1876 | len = sizeof(struct sadb_address) + PFKEY_ALIGN8(saddr->sa_len); |
| 1877 | |
| 1878 | if (buf + len > lim) |
| 1879 | return NULL; |
| 1880 | |
| 1881 | memset(p, 0, len); |
| 1882 | p->sadb_address_len = PFKEY_UNIT64(len); |
| 1883 | p->sadb_address_exttype = exttype & 0xffff; |
| 1884 | p->sadb_address_proto = ul_proto & 0xff; |
| 1885 | p->sadb_address_prefixlen = prefixlen; |
| 1886 | p->sadb_address_reserved = 0; |
| 1887 | |
| 1888 | memcpy(p + 1, saddr, saddr->sa_len); |
| 1889 | |
| 1890 | return(buf + len); |
| 1891 | } |
| 1892 | |
| 1893 | /* |
| 1894 | * set sadb_key structure after clearing buffer with zero. |
| 1895 | * OUT: the pointer of buf + len. |
| 1896 | */ |
| 1897 | static caddr_t |
| 1898 | pfkey_setsadbkey(caddr_t buf, caddr_t lim, u_int type, caddr_t key, |
| 1899 | u_int keylen) |
| 1900 | { |
| 1901 | struct sadb_key *p; |
| 1902 | u_int len; |
| 1903 | |
| 1904 | p = (struct sadb_key *)buf; |
| 1905 | len = sizeof(struct sadb_key) + PFKEY_ALIGN8(keylen); |
| 1906 | |
| 1907 | if (buf + len > lim) |
| 1908 | return NULL; |
| 1909 | |
| 1910 | memset(p, 0, len); |
| 1911 | p->sadb_key_len = PFKEY_UNIT64(len); |
| 1912 | p->sadb_key_exttype = type; |
| 1913 | p->sadb_key_bits = keylen << 3; |
| 1914 | p->sadb_key_reserved = 0; |
| 1915 | |
| 1916 | memcpy(p + 1, key, keylen); |
| 1917 | |
| 1918 | return buf + len; |
| 1919 | } |
| 1920 | |
| 1921 | /* |
| 1922 | * set sadb_lifetime structure after clearing buffer with zero. |
| 1923 | * OUT: the pointer of buf + len. |
| 1924 | */ |
| 1925 | static caddr_t |
| 1926 | pfkey_setsadblifetime(caddr_t buf, caddr_t lim, u_int type, u_int32_t l_alloc, |
| 1927 | u_int32_t l_bytes, u_int32_t l_addtime, u_int32_t l_usetime) |
| 1928 | { |
| 1929 | struct sadb_lifetime *p; |
| 1930 | u_int len; |
| 1931 | |
| 1932 | p = (struct sadb_lifetime *)buf; |
| 1933 | len = sizeof(struct sadb_lifetime); |
| 1934 | |
| 1935 | if (buf + len > lim) |
| 1936 | return NULL; |
| 1937 | |
| 1938 | memset(p, 0, len); |
| 1939 | p->sadb_lifetime_len = PFKEY_UNIT64(len); |
| 1940 | p->sadb_lifetime_exttype = type; |
| 1941 | |
| 1942 | switch (type) { |
| 1943 | case SADB_EXT_LIFETIME_SOFT: |
| 1944 | p->sadb_lifetime_allocations |
| 1945 | = (l_alloc * soft_lifetime_allocations_rate) /100; |
| 1946 | p->sadb_lifetime_bytes |
| 1947 | = (l_bytes * soft_lifetime_bytes_rate) /100; |
| 1948 | p->sadb_lifetime_addtime |
| 1949 | = (l_addtime * soft_lifetime_addtime_rate) /100; |
| 1950 | p->sadb_lifetime_usetime |
| 1951 | = (l_usetime * soft_lifetime_usetime_rate) /100; |
| 1952 | break; |
| 1953 | case SADB_EXT_LIFETIME_HARD: |
| 1954 | p->sadb_lifetime_allocations = l_alloc; |
| 1955 | p->sadb_lifetime_bytes = l_bytes; |
| 1956 | p->sadb_lifetime_addtime = l_addtime; |
| 1957 | p->sadb_lifetime_usetime = l_usetime; |
| 1958 | break; |
| 1959 | } |
| 1960 | |
| 1961 | return buf + len; |
| 1962 | } |
| 1963 | |
| 1964 | /* |
| 1965 | * copy secasvar data into sadb_address. |
| 1966 | * `buf' must has been allocated sufficiently. |
| 1967 | */ |
| 1968 | static caddr_t |
| 1969 | pfkey_setsadbxsa2(caddr_t buf, caddr_t lim, u_int32_t mode0, u_int32_t reqid) |
| 1970 | { |
| 1971 | struct sadb_x_sa2 *p; |
| 1972 | u_int8_t mode = mode0 & 0xff; |
| 1973 | u_int len; |
| 1974 | |
| 1975 | p = (struct sadb_x_sa2 *)buf; |
| 1976 | len = sizeof(struct sadb_x_sa2); |
| 1977 | |
| 1978 | if (buf + len > lim) |
| 1979 | return NULL; |
| 1980 | |
| 1981 | memset(p, 0, len); |
| 1982 | p->sadb_x_sa2_len = PFKEY_UNIT64(len); |
| 1983 | p->sadb_x_sa2_exttype = SADB_X_EXT_SA2; |
| 1984 | p->sadb_x_sa2_mode = mode; |
| 1985 | p->sadb_x_sa2_reqid = reqid; |
| 1986 | |
| 1987 | return(buf + len); |
| 1988 | } |