| 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 __P((int)); |
| 53 | static int setsupportedmap __P((struct sadb_supported *)); |
| 54 | static struct sadb_alg *findsupportedalg __P((u_int, u_int)); |
| 55 | static int pfkey_send_x1 __P((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 __P((int, u_int, u_int, u_int, |
| 60 | struct sockaddr *, struct sockaddr *, u_int32_t)); |
| 61 | static int pfkey_send_x3 __P((int, u_int, u_int)); |
| 62 | static int pfkey_send_x4 __P((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 __P((int, u_int, u_int32_t)); |
| 66 | |
| 67 | static caddr_t pfkey_setsadbmsg __P((caddr_t, caddr_t, u_int, u_int, |
| 68 | u_int, u_int32_t, pid_t)); |
| 69 | static caddr_t pfkey_setsadbsa __P((caddr_t, caddr_t, u_int32_t, u_int, |
| 70 | u_int, u_int, u_int32_t)); |
| 71 | static caddr_t pfkey_setsadbaddr __P((caddr_t, caddr_t, u_int, |
| 72 | struct sockaddr *, u_int, u_int)); |
| 73 | static caddr_t pfkey_setsadbkey __P((caddr_t, caddr_t, u_int, caddr_t, u_int)); |
| 74 | static caddr_t pfkey_setsadblifetime __P((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 __P((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, }; |
| 82 | |
| 83 | static int supported_map[] = { |
| 84 | SADB_SATYPE_AH, |
| 85 | SADB_SATYPE_ESP, |
| 86 | SADB_X_SATYPE_IPCOMP, |
| 87 | }; |
| 88 | |
| 89 | static int |
| 90 | findsupportedmap(satype) |
| 91 | 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(satype, alg_id) |
| 103 | u_int satype, alg_id; |
| 104 | { |
| 105 | int algno; |
| 106 | int tlen; |
| 107 | caddr_t p; |
| 108 | |
| 109 | /* validity check */ |
| 110 | algno = findsupportedmap(satype); |
| 111 | if (algno == -1) { |
| 112 | __ipsec_errcode = EIPSEC_INVAL_ARGUMENT; |
| 113 | return NULL; |
| 114 | } |
| 115 | if (ipsec_supported[algno] == NULL) { |
| 116 | __ipsec_errcode = EIPSEC_DO_GET_SUPP_LIST; |
| 117 | return NULL; |
| 118 | } |
| 119 | |
| 120 | tlen = ipsec_supported[algno]->sadb_supported_len |
| 121 | - sizeof(struct sadb_supported); |
| 122 | p = (caddr_t)(ipsec_supported[algno] + 1); |
| 123 | while (tlen > 0) { |
| 124 | if (tlen < sizeof(struct sadb_alg)) { |
| 125 | /* invalid format */ |
| 126 | break; |
| 127 | } |
| 128 | if (((struct sadb_alg *)p)->sadb_alg_id == alg_id) |
| 129 | return (struct sadb_alg *)p; |
| 130 | |
| 131 | tlen -= sizeof(struct sadb_alg); |
| 132 | p += sizeof(struct sadb_alg); |
| 133 | } |
| 134 | |
| 135 | __ipsec_errcode = EIPSEC_NOT_SUPPORTED; |
| 136 | return NULL; |
| 137 | } |
| 138 | |
| 139 | static int |
| 140 | setsupportedmap(sup) |
| 141 | struct sadb_supported *sup; |
| 142 | { |
| 143 | struct sadb_supported **ipsup; |
| 144 | |
| 145 | switch (sup->sadb_supported_exttype) { |
| 146 | case SADB_EXT_SUPPORTED_AUTH: |
| 147 | ipsup = &ipsec_supported[findsupportedmap(SADB_SATYPE_AH)]; |
| 148 | break; |
| 149 | case SADB_EXT_SUPPORTED_ENCRYPT: |
| 150 | ipsup = &ipsec_supported[findsupportedmap(SADB_SATYPE_ESP)]; |
| 151 | break; |
| 152 | default: |
| 153 | __ipsec_errcode = EIPSEC_INVAL_SATYPE; |
| 154 | return -1; |
| 155 | } |
| 156 | |
| 157 | if (*ipsup) |
| 158 | free(*ipsup); |
| 159 | |
| 160 | *ipsup = malloc(sup->sadb_supported_len); |
| 161 | if (!*ipsup) { |
| 162 | __ipsec_set_strerror(strerror(errno)); |
| 163 | return -1; |
| 164 | } |
| 165 | memcpy(*ipsup, sup, sup->sadb_supported_len); |
| 166 | |
| 167 | return 0; |
| 168 | } |
| 169 | |
| 170 | /* |
| 171 | * check key length against algorithm specified. |
| 172 | * This function is called with SADB_EXT_SUPPORTED_{AUTH,ENCRYPT} as the |
| 173 | * augument, and only calls to ipsec_check_keylen2(); |
| 174 | * keylen is the unit of bit. |
| 175 | * OUT: |
| 176 | * -1: invalid. |
| 177 | * 0: valid. |
| 178 | */ |
| 179 | int |
| 180 | ipsec_check_keylen(supported, alg_id, keylen) |
| 181 | u_int supported; |
| 182 | u_int alg_id; |
| 183 | u_int keylen; |
| 184 | { |
| 185 | int satype; |
| 186 | |
| 187 | /* validity check */ |
| 188 | switch (supported) { |
| 189 | case SADB_EXT_SUPPORTED_AUTH: |
| 190 | satype = SADB_SATYPE_AH; |
| 191 | break; |
| 192 | case SADB_EXT_SUPPORTED_ENCRYPT: |
| 193 | satype = SADB_SATYPE_ESP; |
| 194 | break; |
| 195 | default: |
| 196 | __ipsec_errcode = EIPSEC_INVAL_ARGUMENT; |
| 197 | return -1; |
| 198 | } |
| 199 | |
| 200 | return ipsec_check_keylen2(satype, alg_id, keylen); |
| 201 | } |
| 202 | |
| 203 | /* |
| 204 | * check key length against algorithm specified. |
| 205 | * satype is one of satype defined at pfkeyv2.h. |
| 206 | * keylen is the unit of bit. |
| 207 | * OUT: |
| 208 | * -1: invalid. |
| 209 | * 0: valid. |
| 210 | */ |
| 211 | int |
| 212 | ipsec_check_keylen2(satype, alg_id, keylen) |
| 213 | u_int satype; |
| 214 | u_int alg_id; |
| 215 | u_int keylen; |
| 216 | { |
| 217 | struct sadb_alg *alg; |
| 218 | |
| 219 | alg = findsupportedalg(satype, alg_id); |
| 220 | if (!alg) |
| 221 | return -1; |
| 222 | |
| 223 | if (keylen < alg->sadb_alg_minbits || keylen > alg->sadb_alg_maxbits) { |
| 224 | __ipsec_errcode = EIPSEC_INVAL_KEYLEN; |
| 225 | return -1; |
| 226 | } |
| 227 | |
| 228 | __ipsec_errcode = EIPSEC_NO_ERROR; |
| 229 | return 0; |
| 230 | } |
| 231 | |
| 232 | /* |
| 233 | * get max/min key length against algorithm specified. |
| 234 | * satype is one of satype defined at pfkeyv2.h. |
| 235 | * keylen is the unit of bit. |
| 236 | * OUT: |
| 237 | * -1: invalid. |
| 238 | * 0: valid. |
| 239 | */ |
| 240 | int |
| 241 | ipsec_get_keylen(supported, alg_id, alg0) |
| 242 | u_int supported, alg_id; |
| 243 | struct sadb_alg *alg0; |
| 244 | { |
| 245 | struct sadb_alg *alg; |
| 246 | u_int satype; |
| 247 | |
| 248 | /* validity check */ |
| 249 | if (!alg0) { |
| 250 | __ipsec_errcode = EIPSEC_INVAL_ARGUMENT; |
| 251 | return -1; |
| 252 | } |
| 253 | |
| 254 | switch (supported) { |
| 255 | case SADB_EXT_SUPPORTED_AUTH: |
| 256 | satype = SADB_SATYPE_AH; |
| 257 | break; |
| 258 | case SADB_EXT_SUPPORTED_ENCRYPT: |
| 259 | satype = SADB_SATYPE_ESP; |
| 260 | break; |
| 261 | default: |
| 262 | __ipsec_errcode = EIPSEC_INVAL_ARGUMENT; |
| 263 | return -1; |
| 264 | } |
| 265 | |
| 266 | alg = findsupportedalg(satype, alg_id); |
| 267 | if (!alg) |
| 268 | return -1; |
| 269 | |
| 270 | memcpy(alg0, alg, sizeof(*alg0)); |
| 271 | |
| 272 | __ipsec_errcode = EIPSEC_NO_ERROR; |
| 273 | return 0; |
| 274 | } |
| 275 | |
| 276 | /* |
| 277 | * set the rate for SOFT lifetime against HARD one. |
| 278 | * If rate is more than 100 or equal to zero, then set to 100. |
| 279 | */ |
| 280 | static u_int soft_lifetime_allocations_rate = PFKEY_SOFT_LIFETIME_RATE; |
| 281 | static u_int soft_lifetime_bytes_rate = PFKEY_SOFT_LIFETIME_RATE; |
| 282 | static u_int soft_lifetime_addtime_rate = PFKEY_SOFT_LIFETIME_RATE; |
| 283 | static u_int soft_lifetime_usetime_rate = PFKEY_SOFT_LIFETIME_RATE; |
| 284 | |
| 285 | u_int |
| 286 | pfkey_set_softrate(type, rate) |
| 287 | u_int type, rate; |
| 288 | { |
| 289 | __ipsec_errcode = EIPSEC_NO_ERROR; |
| 290 | |
| 291 | if (rate > 100 || rate == 0) |
| 292 | rate = 100; |
| 293 | |
| 294 | switch (type) { |
| 295 | case SADB_X_LIFETIME_ALLOCATIONS: |
| 296 | soft_lifetime_allocations_rate = rate; |
| 297 | return 0; |
| 298 | case SADB_X_LIFETIME_BYTES: |
| 299 | soft_lifetime_bytes_rate = rate; |
| 300 | return 0; |
| 301 | case SADB_X_LIFETIME_ADDTIME: |
| 302 | soft_lifetime_addtime_rate = rate; |
| 303 | return 0; |
| 304 | case SADB_X_LIFETIME_USETIME: |
| 305 | soft_lifetime_usetime_rate = rate; |
| 306 | return 0; |
| 307 | } |
| 308 | |
| 309 | __ipsec_errcode = EIPSEC_INVAL_ARGUMENT; |
| 310 | return 1; |
| 311 | } |
| 312 | |
| 313 | /* |
| 314 | * get current rate for SOFT lifetime against HARD one. |
| 315 | * ATTENTION: ~0 is returned if invalid type was passed. |
| 316 | */ |
| 317 | u_int |
| 318 | pfkey_get_softrate(type) |
| 319 | u_int type; |
| 320 | { |
| 321 | switch (type) { |
| 322 | case SADB_X_LIFETIME_ALLOCATIONS: |
| 323 | return soft_lifetime_allocations_rate; |
| 324 | case SADB_X_LIFETIME_BYTES: |
| 325 | return soft_lifetime_bytes_rate; |
| 326 | case SADB_X_LIFETIME_ADDTIME: |
| 327 | return soft_lifetime_addtime_rate; |
| 328 | case SADB_X_LIFETIME_USETIME: |
| 329 | return soft_lifetime_usetime_rate; |
| 330 | } |
| 331 | |
| 332 | return ~0; |
| 333 | } |
| 334 | |
| 335 | /* |
| 336 | * sending SADB_GETSPI message to the kernel. |
| 337 | * OUT: |
| 338 | * positive: success and return length sent. |
| 339 | * -1 : error occured, and set errno. |
| 340 | */ |
| 341 | int |
| 342 | pfkey_send_getspi(so, satype, mode, src, dst, min, max, reqid, seq) |
| 343 | int so; |
| 344 | u_int satype, mode; |
| 345 | struct sockaddr *src, *dst; |
| 346 | u_int32_t min, max, reqid, seq; |
| 347 | { |
| 348 | struct sadb_msg *newmsg; |
| 349 | caddr_t ep; |
| 350 | int len; |
| 351 | int need_spirange = 0; |
| 352 | caddr_t p; |
| 353 | int plen; |
| 354 | |
| 355 | /* validity check */ |
| 356 | if (src == NULL || dst == NULL) { |
| 357 | __ipsec_errcode = EIPSEC_INVAL_ARGUMENT; |
| 358 | return -1; |
| 359 | } |
| 360 | if (src->sa_family != dst->sa_family) { |
| 361 | __ipsec_errcode = EIPSEC_FAMILY_MISMATCH; |
| 362 | return -1; |
| 363 | } |
| 364 | if (min > max || (min > 0 && min <= 255)) { |
| 365 | __ipsec_errcode = EIPSEC_INVAL_SPI; |
| 366 | return -1; |
| 367 | } |
| 368 | switch (src->sa_family) { |
| 369 | case AF_INET: |
| 370 | plen = sizeof(struct in_addr) << 3; |
| 371 | break; |
| 372 | case AF_INET6: |
| 373 | plen = sizeof(struct in6_addr) << 3; |
| 374 | break; |
| 375 | default: |
| 376 | __ipsec_errcode = EIPSEC_INVAL_FAMILY; |
| 377 | return -1; |
| 378 | } |
| 379 | |
| 380 | /* create new sadb_msg to send. */ |
| 381 | len = sizeof(struct sadb_msg) |
| 382 | + sizeof(struct sadb_x_sa2) |
| 383 | + sizeof(struct sadb_address) |
| 384 | + PFKEY_ALIGN8(src->sa_len) |
| 385 | + sizeof(struct sadb_address) |
| 386 | + PFKEY_ALIGN8(dst->sa_len); |
| 387 | |
| 388 | if (min > 255 && max < ~0) { |
| 389 | need_spirange++; |
| 390 | len += sizeof(struct sadb_spirange); |
| 391 | } |
| 392 | |
| 393 | if ((newmsg = CALLOC(len, struct sadb_msg *)) == NULL) { |
| 394 | __ipsec_set_strerror(strerror(errno)); |
| 395 | return -1; |
| 396 | } |
| 397 | ep = ((caddr_t)newmsg) + len; |
| 398 | |
| 399 | p = pfkey_setsadbmsg((caddr_t)newmsg, ep, SADB_GETSPI, |
| 400 | len, satype, seq, getpid()); |
| 401 | if (!p) { |
| 402 | free(newmsg); |
| 403 | return -1; |
| 404 | } |
| 405 | |
| 406 | p = pfkey_setsadbxsa2(p, ep, mode, reqid); |
| 407 | if (!p) { |
| 408 | free(newmsg); |
| 409 | return -1; |
| 410 | } |
| 411 | |
| 412 | /* set sadb_address for source */ |
| 413 | p = pfkey_setsadbaddr(p, ep, SADB_EXT_ADDRESS_SRC, src, plen, |
| 414 | IPSEC_ULPROTO_ANY); |
| 415 | if (!p) { |
| 416 | free(newmsg); |
| 417 | return -1; |
| 418 | } |
| 419 | |
| 420 | /* set sadb_address for destination */ |
| 421 | p = pfkey_setsadbaddr(p, ep, SADB_EXT_ADDRESS_DST, dst, plen, |
| 422 | IPSEC_ULPROTO_ANY); |
| 423 | if (!p) { |
| 424 | free(newmsg); |
| 425 | return -1; |
| 426 | } |
| 427 | |
| 428 | /* proccessing spi range */ |
| 429 | if (need_spirange) { |
| 430 | struct sadb_spirange spirange; |
| 431 | |
| 432 | if (p + sizeof(spirange) > ep) { |
| 433 | free(newmsg); |
| 434 | return -1; |
| 435 | } |
| 436 | |
| 437 | memset(&spirange, 0, sizeof(spirange)); |
| 438 | spirange.sadb_spirange_len = PFKEY_UNIT64(sizeof(spirange)); |
| 439 | spirange.sadb_spirange_exttype = SADB_EXT_SPIRANGE; |
| 440 | spirange.sadb_spirange_min = min; |
| 441 | spirange.sadb_spirange_max = max; |
| 442 | |
| 443 | memcpy(p, &spirange, sizeof(spirange)); |
| 444 | |
| 445 | p += sizeof(spirange); |
| 446 | } |
| 447 | if (p != ep) { |
| 448 | free(newmsg); |
| 449 | return -1; |
| 450 | } |
| 451 | |
| 452 | /* send message */ |
| 453 | len = pfkey_send(so, newmsg, len); |
| 454 | free(newmsg); |
| 455 | |
| 456 | if (len < 0) |
| 457 | return -1; |
| 458 | |
| 459 | __ipsec_errcode = EIPSEC_NO_ERROR; |
| 460 | return len; |
| 461 | } |
| 462 | |
| 463 | /* |
| 464 | * sending SADB_UPDATE message to the kernel. |
| 465 | * The length of key material is a_keylen + e_keylen. |
| 466 | * OUT: |
| 467 | * positive: success and return length sent. |
| 468 | * -1 : error occured, and set errno. |
| 469 | */ |
| 470 | int |
| 471 | pfkey_send_update(so, satype, mode, src, dst, spi, reqid, wsize, |
| 472 | keymat, e_type, e_keylen, a_type, a_keylen, flags, |
| 473 | l_alloc, l_bytes, l_addtime, l_usetime, seq) |
| 474 | int so; |
| 475 | u_int satype, mode, wsize; |
| 476 | struct sockaddr *src, *dst; |
| 477 | u_int32_t spi, reqid; |
| 478 | caddr_t keymat; |
| 479 | u_int e_type, e_keylen, a_type, a_keylen, flags; |
| 480 | u_int32_t l_alloc; |
| 481 | u_int64_t l_bytes, l_addtime, l_usetime; |
| 482 | u_int32_t seq; |
| 483 | { |
| 484 | int len; |
| 485 | if ((len = pfkey_send_x1(so, SADB_UPDATE, satype, mode, src, dst, spi, |
| 486 | reqid, wsize, |
| 487 | keymat, e_type, e_keylen, a_type, a_keylen, flags, |
| 488 | l_alloc, l_bytes, l_addtime, l_usetime, seq)) < 0) |
| 489 | return -1; |
| 490 | |
| 491 | return len; |
| 492 | } |
| 493 | |
| 494 | /* |
| 495 | * sending SADB_ADD message to the kernel. |
| 496 | * The length of key material is a_keylen + e_keylen. |
| 497 | * OUT: |
| 498 | * positive: success and return length sent. |
| 499 | * -1 : error occured, and set errno. |
| 500 | */ |
| 501 | int |
| 502 | pfkey_send_add(so, satype, mode, src, dst, spi, reqid, wsize, |
| 503 | keymat, e_type, e_keylen, a_type, a_keylen, flags, |
| 504 | l_alloc, l_bytes, l_addtime, l_usetime, seq) |
| 505 | int so; |
| 506 | u_int satype, mode, wsize; |
| 507 | struct sockaddr *src, *dst; |
| 508 | u_int32_t spi, reqid; |
| 509 | caddr_t keymat; |
| 510 | u_int e_type, e_keylen, a_type, a_keylen, flags; |
| 511 | u_int32_t l_alloc; |
| 512 | u_int64_t l_bytes, l_addtime, l_usetime; |
| 513 | u_int32_t seq; |
| 514 | { |
| 515 | int len; |
| 516 | if ((len = pfkey_send_x1(so, SADB_ADD, satype, mode, src, dst, spi, |
| 517 | reqid, wsize, |
| 518 | keymat, e_type, e_keylen, a_type, a_keylen, flags, |
| 519 | l_alloc, l_bytes, l_addtime, l_usetime, seq)) < 0) |
| 520 | return -1; |
| 521 | |
| 522 | return len; |
| 523 | } |
| 524 | |
| 525 | /* |
| 526 | * sending SADB_DELETE message to the kernel. |
| 527 | * OUT: |
| 528 | * positive: success and return length sent. |
| 529 | * -1 : error occured, and set errno. |
| 530 | */ |
| 531 | int |
| 532 | pfkey_send_delete(so, satype, mode, src, dst, spi) |
| 533 | int so; |
| 534 | u_int satype, mode; |
| 535 | struct sockaddr *src, *dst; |
| 536 | u_int32_t spi; |
| 537 | { |
| 538 | int len; |
| 539 | if ((len = pfkey_send_x2(so, SADB_DELETE, satype, mode, src, dst, spi)) < 0) |
| 540 | return -1; |
| 541 | |
| 542 | return len; |
| 543 | } |
| 544 | |
| 545 | /* |
| 546 | * sending SADB_DELETE without spi to the kernel. This is |
| 547 | * the "delete all" request (an extension also present in |
| 548 | * Solaris). |
| 549 | * |
| 550 | * OUT: |
| 551 | * positive: success and return length sent |
| 552 | * -1 : error occured, and set errno |
| 553 | */ |
| 554 | int |
| 555 | pfkey_send_delete_all(so, satype, mode, src, dst) |
| 556 | int so; |
| 557 | u_int satype, mode; |
| 558 | struct sockaddr *src, *dst; |
| 559 | { |
| 560 | struct sadb_msg *newmsg; |
| 561 | int len; |
| 562 | caddr_t p; |
| 563 | int plen; |
| 564 | caddr_t ep; |
| 565 | |
| 566 | /* validity check */ |
| 567 | if (src == NULL || dst == NULL) { |
| 568 | __ipsec_errcode = EIPSEC_INVAL_ARGUMENT; |
| 569 | return -1; |
| 570 | } |
| 571 | if (src->sa_family != dst->sa_family) { |
| 572 | __ipsec_errcode = EIPSEC_FAMILY_MISMATCH; |
| 573 | return -1; |
| 574 | } |
| 575 | switch (src->sa_family) { |
| 576 | case AF_INET: |
| 577 | plen = sizeof(struct in_addr) << 3; |
| 578 | break; |
| 579 | case AF_INET6: |
| 580 | plen = sizeof(struct in6_addr) << 3; |
| 581 | break; |
| 582 | default: |
| 583 | __ipsec_errcode = EIPSEC_INVAL_FAMILY; |
| 584 | return -1; |
| 585 | } |
| 586 | |
| 587 | /* create new sadb_msg to reply. */ |
| 588 | len = sizeof(struct sadb_msg) |
| 589 | + sizeof(struct sadb_address) |
| 590 | + PFKEY_ALIGN8(src->sa_len) |
| 591 | + sizeof(struct sadb_address) |
| 592 | + PFKEY_ALIGN8(dst->sa_len); |
| 593 | |
| 594 | if ((newmsg = CALLOC(len, struct sadb_msg *)) == NULL) { |
| 595 | __ipsec_set_strerror(strerror(errno)); |
| 596 | return -1; |
| 597 | } |
| 598 | ep = ((caddr_t)newmsg) + len; |
| 599 | |
| 600 | p = pfkey_setsadbmsg((caddr_t)newmsg, ep, SADB_DELETE, len, satype, 0, |
| 601 | getpid()); |
| 602 | if (!p) { |
| 603 | free(newmsg); |
| 604 | return -1; |
| 605 | } |
| 606 | p = pfkey_setsadbaddr(p, ep, SADB_EXT_ADDRESS_SRC, src, plen, |
| 607 | IPSEC_ULPROTO_ANY); |
| 608 | if (!p) { |
| 609 | free(newmsg); |
| 610 | return -1; |
| 611 | } |
| 612 | p = pfkey_setsadbaddr(p, ep, SADB_EXT_ADDRESS_DST, dst, plen, |
| 613 | IPSEC_ULPROTO_ANY); |
| 614 | if (!p || p != ep) { |
| 615 | free(newmsg); |
| 616 | return -1; |
| 617 | } |
| 618 | |
| 619 | /* send message */ |
| 620 | len = pfkey_send(so, newmsg, len); |
| 621 | free(newmsg); |
| 622 | |
| 623 | if (len < 0) |
| 624 | return -1; |
| 625 | |
| 626 | __ipsec_errcode = EIPSEC_NO_ERROR; |
| 627 | return len; |
| 628 | } |
| 629 | |
| 630 | /* |
| 631 | * sending SADB_GET message to the kernel. |
| 632 | * OUT: |
| 633 | * positive: success and return length sent. |
| 634 | * -1 : error occured, and set errno. |
| 635 | */ |
| 636 | int |
| 637 | pfkey_send_get(so, satype, mode, src, dst, spi) |
| 638 | int so; |
| 639 | u_int satype, mode; |
| 640 | struct sockaddr *src, *dst; |
| 641 | u_int32_t spi; |
| 642 | { |
| 643 | int len; |
| 644 | if ((len = pfkey_send_x2(so, SADB_GET, satype, mode, src, dst, spi)) < 0) |
| 645 | return -1; |
| 646 | |
| 647 | return len; |
| 648 | } |
| 649 | |
| 650 | /* |
| 651 | * sending SADB_REGISTER message to the kernel. |
| 652 | * OUT: |
| 653 | * positive: success and return length sent. |
| 654 | * -1 : error occured, and set errno. |
| 655 | */ |
| 656 | int |
| 657 | pfkey_send_register(so, satype) |
| 658 | int so; |
| 659 | u_int satype; |
| 660 | { |
| 661 | int len, algno; |
| 662 | |
| 663 | if (satype == PF_UNSPEC) { |
| 664 | for (algno = 0; |
| 665 | algno < sizeof(supported_map)/sizeof(supported_map[0]); |
| 666 | algno++) { |
| 667 | if (ipsec_supported[algno]) { |
| 668 | free(ipsec_supported[algno]); |
| 669 | ipsec_supported[algno] = NULL; |
| 670 | } |
| 671 | } |
| 672 | } else { |
| 673 | algno = findsupportedmap(satype); |
| 674 | if (algno == -1) { |
| 675 | __ipsec_errcode = EIPSEC_INVAL_ARGUMENT; |
| 676 | return -1; |
| 677 | } |
| 678 | |
| 679 | if (ipsec_supported[algno]) { |
| 680 | free(ipsec_supported[algno]); |
| 681 | ipsec_supported[algno] = NULL; |
| 682 | } |
| 683 | } |
| 684 | |
| 685 | if ((len = pfkey_send_x3(so, SADB_REGISTER, satype)) < 0) |
| 686 | return -1; |
| 687 | |
| 688 | return len; |
| 689 | } |
| 690 | |
| 691 | /* |
| 692 | * receiving SADB_REGISTER message from the kernel, and copy buffer for |
| 693 | * sadb_supported returned into ipsec_supported. |
| 694 | * OUT: |
| 695 | * 0: success and return length sent. |
| 696 | * -1: error occured, and set errno. |
| 697 | */ |
| 698 | int |
| 699 | pfkey_recv_register(so) |
| 700 | int so; |
| 701 | { |
| 702 | pid_t pid = getpid(); |
| 703 | struct sadb_msg *newmsg; |
| 704 | int error = -1; |
| 705 | |
| 706 | /* receive message */ |
| 707 | do { |
| 708 | if ((newmsg = pfkey_recv(so)) == NULL) |
| 709 | return -1; |
| 710 | } while (newmsg->sadb_msg_type != SADB_REGISTER |
| 711 | || newmsg->sadb_msg_pid != pid); |
| 712 | |
| 713 | /* check and fix */ |
| 714 | newmsg->sadb_msg_len = PFKEY_UNUNIT64(newmsg->sadb_msg_len); |
| 715 | |
| 716 | error = pfkey_set_supported(newmsg, newmsg->sadb_msg_len); |
| 717 | free(newmsg); |
| 718 | |
| 719 | if (error == 0) |
| 720 | __ipsec_errcode = EIPSEC_NO_ERROR; |
| 721 | |
| 722 | return error; |
| 723 | } |
| 724 | |
| 725 | /* |
| 726 | * receiving SADB_REGISTER message from the kernel, and copy buffer for |
| 727 | * sadb_supported returned into ipsec_supported. |
| 728 | * NOTE: sadb_msg_len must be host order. |
| 729 | * IN: |
| 730 | * tlen: msg length, it's to makeing sure. |
| 731 | * OUT: |
| 732 | * 0: success and return length sent. |
| 733 | * -1: error occured, and set errno. |
| 734 | */ |
| 735 | int |
| 736 | pfkey_set_supported(msg, tlen) |
| 737 | struct sadb_msg *msg; |
| 738 | int tlen; |
| 739 | { |
| 740 | struct sadb_supported *sup; |
| 741 | caddr_t p; |
| 742 | caddr_t ep; |
| 743 | |
| 744 | /* validity */ |
| 745 | if (msg->sadb_msg_len != tlen) { |
| 746 | __ipsec_errcode = EIPSEC_INVAL_ARGUMENT; |
| 747 | return -1; |
| 748 | } |
| 749 | |
| 750 | p = (caddr_t)msg; |
| 751 | ep = p + tlen; |
| 752 | |
| 753 | p += sizeof(struct sadb_msg); |
| 754 | |
| 755 | while (p < ep) { |
| 756 | sup = (struct sadb_supported *)p; |
| 757 | if (ep < p + sizeof(*sup) || |
| 758 | PFKEY_EXTLEN(sup) < sizeof(*sup) || |
| 759 | ep < p + sup->sadb_supported_len) { |
| 760 | /* invalid format */ |
| 761 | break; |
| 762 | } |
| 763 | |
| 764 | switch (sup->sadb_supported_exttype) { |
| 765 | case SADB_EXT_SUPPORTED_AUTH: |
| 766 | case SADB_EXT_SUPPORTED_ENCRYPT: |
| 767 | break; |
| 768 | default: |
| 769 | __ipsec_errcode = EIPSEC_INVAL_SATYPE; |
| 770 | return -1; |
| 771 | } |
| 772 | |
| 773 | /* fixed length */ |
| 774 | sup->sadb_supported_len = PFKEY_EXTLEN(sup); |
| 775 | |
| 776 | /* set supported map */ |
| 777 | if (setsupportedmap(sup) != 0) |
| 778 | return -1; |
| 779 | |
| 780 | p += sup->sadb_supported_len; |
| 781 | } |
| 782 | |
| 783 | if (p != ep) { |
| 784 | __ipsec_errcode = EIPSEC_INVAL_SATYPE; |
| 785 | return -1; |
| 786 | } |
| 787 | |
| 788 | __ipsec_errcode = EIPSEC_NO_ERROR; |
| 789 | |
| 790 | return 0; |
| 791 | } |
| 792 | |
| 793 | /* |
| 794 | * sending SADB_FLUSH message to the kernel. |
| 795 | * OUT: |
| 796 | * positive: success and return length sent. |
| 797 | * -1 : error occured, and set errno. |
| 798 | */ |
| 799 | int |
| 800 | pfkey_send_flush(so, satype) |
| 801 | int so; |
| 802 | u_int satype; |
| 803 | { |
| 804 | int len; |
| 805 | |
| 806 | if ((len = pfkey_send_x3(so, SADB_FLUSH, satype)) < 0) |
| 807 | return -1; |
| 808 | |
| 809 | return len; |
| 810 | } |
| 811 | |
| 812 | /* |
| 813 | * sending SADB_DUMP message to the kernel. |
| 814 | * OUT: |
| 815 | * positive: success and return length sent. |
| 816 | * -1 : error occured, and set errno. |
| 817 | */ |
| 818 | int |
| 819 | pfkey_send_dump(so, satype) |
| 820 | int so; |
| 821 | u_int satype; |
| 822 | { |
| 823 | int len; |
| 824 | |
| 825 | if ((len = pfkey_send_x3(so, SADB_DUMP, satype)) < 0) |
| 826 | return -1; |
| 827 | |
| 828 | return len; |
| 829 | } |
| 830 | |
| 831 | /* |
| 832 | * sending SADB_X_PROMISC message to the kernel. |
| 833 | * NOTE that this function handles promisc mode toggle only. |
| 834 | * IN: |
| 835 | * flag: set promisc off if zero, set promisc on if non-zero. |
| 836 | * OUT: |
| 837 | * positive: success and return length sent. |
| 838 | * -1 : error occured, and set errno. |
| 839 | * 0 : error occured, and set errno. |
| 840 | * others: a pointer to new allocated buffer in which supported |
| 841 | * algorithms is. |
| 842 | */ |
| 843 | int |
| 844 | pfkey_send_promisc_toggle(so, flag) |
| 845 | int so; |
| 846 | int flag; |
| 847 | { |
| 848 | int len; |
| 849 | |
| 850 | if ((len = pfkey_send_x3(so, SADB_X_PROMISC, (flag ? 1 : 0))) < 0) |
| 851 | return -1; |
| 852 | |
| 853 | return len; |
| 854 | } |
| 855 | |
| 856 | /* |
| 857 | * sending SADB_X_SPDADD message to the kernel. |
| 858 | * OUT: |
| 859 | * positive: success and return length sent. |
| 860 | * -1 : error occured, and set errno. |
| 861 | */ |
| 862 | int |
| 863 | pfkey_send_spdadd(so, src, prefs, dst, prefd, proto, policy, policylen, seq) |
| 864 | int so; |
| 865 | struct sockaddr *src, *dst; |
| 866 | u_int prefs, prefd, proto; |
| 867 | caddr_t policy; |
| 868 | int policylen; |
| 869 | u_int32_t seq; |
| 870 | { |
| 871 | int len; |
| 872 | |
| 873 | if ((len = pfkey_send_x4(so, SADB_X_SPDADD, |
| 874 | src, prefs, dst, prefd, proto, |
| 875 | 0, 0, |
| 876 | policy, policylen, seq)) < 0) |
| 877 | return -1; |
| 878 | |
| 879 | return len; |
| 880 | } |
| 881 | |
| 882 | /* |
| 883 | * sending SADB_X_SPDADD message to the kernel. |
| 884 | * OUT: |
| 885 | * positive: success and return length sent. |
| 886 | * -1 : error occured, and set errno. |
| 887 | */ |
| 888 | int |
| 889 | pfkey_send_spdadd2(so, src, prefs, dst, prefd, proto, ltime, vtime, |
| 890 | policy, policylen, seq) |
| 891 | int so; |
| 892 | struct sockaddr *src, *dst; |
| 893 | u_int prefs, prefd, proto; |
| 894 | u_int64_t ltime, vtime; |
| 895 | caddr_t policy; |
| 896 | int policylen; |
| 897 | u_int32_t seq; |
| 898 | { |
| 899 | int len; |
| 900 | |
| 901 | if ((len = pfkey_send_x4(so, SADB_X_SPDADD, |
| 902 | src, prefs, dst, prefd, proto, |
| 903 | ltime, vtime, |
| 904 | policy, policylen, seq)) < 0) |
| 905 | return -1; |
| 906 | |
| 907 | return len; |
| 908 | } |
| 909 | |
| 910 | /* |
| 911 | * sending SADB_X_SPDUPDATE message to the kernel. |
| 912 | * OUT: |
| 913 | * positive: success and return length sent. |
| 914 | * -1 : error occured, and set errno. |
| 915 | */ |
| 916 | int |
| 917 | pfkey_send_spdupdate(so, src, prefs, dst, prefd, proto, policy, policylen, seq) |
| 918 | int so; |
| 919 | struct sockaddr *src, *dst; |
| 920 | u_int prefs, prefd, proto; |
| 921 | caddr_t policy; |
| 922 | int policylen; |
| 923 | u_int32_t seq; |
| 924 | { |
| 925 | int len; |
| 926 | |
| 927 | if ((len = pfkey_send_x4(so, SADB_X_SPDUPDATE, |
| 928 | src, prefs, dst, prefd, proto, |
| 929 | 0, 0, |
| 930 | policy, policylen, seq)) < 0) |
| 931 | return -1; |
| 932 | |
| 933 | return len; |
| 934 | } |
| 935 | |
| 936 | /* |
| 937 | * sending SADB_X_SPDUPDATE message to the kernel. |
| 938 | * OUT: |
| 939 | * positive: success and return length sent. |
| 940 | * -1 : error occured, and set errno. |
| 941 | */ |
| 942 | int |
| 943 | pfkey_send_spdupdate2(so, src, prefs, dst, prefd, proto, ltime, vtime, |
| 944 | policy, policylen, seq) |
| 945 | int so; |
| 946 | struct sockaddr *src, *dst; |
| 947 | u_int prefs, prefd, proto; |
| 948 | u_int64_t ltime, vtime; |
| 949 | caddr_t policy; |
| 950 | int policylen; |
| 951 | u_int32_t seq; |
| 952 | { |
| 953 | int len; |
| 954 | |
| 955 | if ((len = pfkey_send_x4(so, SADB_X_SPDUPDATE, |
| 956 | src, prefs, dst, prefd, proto, |
| 957 | ltime, vtime, |
| 958 | policy, policylen, seq)) < 0) |
| 959 | return -1; |
| 960 | |
| 961 | return len; |
| 962 | } |
| 963 | |
| 964 | /* |
| 965 | * sending SADB_X_SPDDELETE message to the kernel. |
| 966 | * OUT: |
| 967 | * positive: success and return length sent. |
| 968 | * -1 : error occured, and set errno. |
| 969 | */ |
| 970 | int |
| 971 | pfkey_send_spddelete(so, src, prefs, dst, prefd, proto, policy, policylen, seq) |
| 972 | int so; |
| 973 | struct sockaddr *src, *dst; |
| 974 | u_int prefs, prefd, proto; |
| 975 | caddr_t policy; |
| 976 | int policylen; |
| 977 | u_int32_t seq; |
| 978 | { |
| 979 | int len; |
| 980 | |
| 981 | if (policylen != sizeof(struct sadb_x_policy)) { |
| 982 | __ipsec_errcode = EIPSEC_INVAL_ARGUMENT; |
| 983 | return -1; |
| 984 | } |
| 985 | |
| 986 | if ((len = pfkey_send_x4(so, SADB_X_SPDDELETE, |
| 987 | src, prefs, dst, prefd, proto, |
| 988 | 0, 0, |
| 989 | policy, policylen, seq)) < 0) |
| 990 | return -1; |
| 991 | |
| 992 | return len; |
| 993 | } |
| 994 | |
| 995 | /* |
| 996 | * sending SADB_X_SPDDELETE message to the kernel. |
| 997 | * OUT: |
| 998 | * positive: success and return length sent. |
| 999 | * -1 : error occured, and set errno. |
| 1000 | */ |
| 1001 | int |
| 1002 | pfkey_send_spddelete2(so, spid) |
| 1003 | int so; |
| 1004 | u_int32_t spid; |
| 1005 | { |
| 1006 | int len; |
| 1007 | |
| 1008 | if ((len = pfkey_send_x5(so, SADB_X_SPDDELETE2, spid)) < 0) |
| 1009 | return -1; |
| 1010 | |
| 1011 | return len; |
| 1012 | } |
| 1013 | |
| 1014 | /* |
| 1015 | * sending SADB_X_SPDGET message to the kernel. |
| 1016 | * OUT: |
| 1017 | * positive: success and return length sent. |
| 1018 | * -1 : error occured, and set errno. |
| 1019 | */ |
| 1020 | int |
| 1021 | pfkey_send_spdget(so, spid) |
| 1022 | int so; |
| 1023 | u_int32_t spid; |
| 1024 | { |
| 1025 | int len; |
| 1026 | |
| 1027 | if ((len = pfkey_send_x5(so, SADB_X_SPDGET, spid)) < 0) |
| 1028 | return -1; |
| 1029 | |
| 1030 | return len; |
| 1031 | } |
| 1032 | |
| 1033 | /* |
| 1034 | * sending SADB_X_SPDSETIDX message to the kernel. |
| 1035 | * OUT: |
| 1036 | * positive: success and return length sent. |
| 1037 | * -1 : error occured, and set errno. |
| 1038 | */ |
| 1039 | int |
| 1040 | pfkey_send_spdsetidx(so, src, prefs, dst, prefd, proto, policy, policylen, seq) |
| 1041 | int so; |
| 1042 | struct sockaddr *src, *dst; |
| 1043 | u_int prefs, prefd, proto; |
| 1044 | caddr_t policy; |
| 1045 | int policylen; |
| 1046 | u_int32_t seq; |
| 1047 | { |
| 1048 | int len; |
| 1049 | |
| 1050 | if (policylen != sizeof(struct sadb_x_policy)) { |
| 1051 | __ipsec_errcode = EIPSEC_INVAL_ARGUMENT; |
| 1052 | return -1; |
| 1053 | } |
| 1054 | |
| 1055 | if ((len = pfkey_send_x4(so, SADB_X_SPDSETIDX, |
| 1056 | src, prefs, dst, prefd, proto, |
| 1057 | 0, 0, |
| 1058 | policy, policylen, seq)) < 0) |
| 1059 | return -1; |
| 1060 | |
| 1061 | return len; |
| 1062 | } |
| 1063 | |
| 1064 | /* |
| 1065 | * sending SADB_SPDFLUSH message to the kernel. |
| 1066 | * OUT: |
| 1067 | * positive: success and return length sent. |
| 1068 | * -1 : error occured, and set errno. |
| 1069 | */ |
| 1070 | int |
| 1071 | pfkey_send_spdflush(so) |
| 1072 | int so; |
| 1073 | { |
| 1074 | int len; |
| 1075 | |
| 1076 | if ((len = pfkey_send_x3(so, SADB_X_SPDFLUSH, SADB_SATYPE_UNSPEC)) < 0) |
| 1077 | return -1; |
| 1078 | |
| 1079 | return len; |
| 1080 | } |
| 1081 | |
| 1082 | /* |
| 1083 | * sending SADB_SPDDUMP message to the kernel. |
| 1084 | * OUT: |
| 1085 | * positive: success and return length sent. |
| 1086 | * -1 : error occured, and set errno. |
| 1087 | */ |
| 1088 | int |
| 1089 | pfkey_send_spddump(so) |
| 1090 | int so; |
| 1091 | { |
| 1092 | int len; |
| 1093 | |
| 1094 | if ((len = pfkey_send_x3(so, SADB_X_SPDDUMP, SADB_SATYPE_UNSPEC)) < 0) |
| 1095 | return -1; |
| 1096 | |
| 1097 | return len; |
| 1098 | } |
| 1099 | |
| 1100 | /* sending SADB_ADD or SADB_UPDATE message to the kernel */ |
| 1101 | static int |
| 1102 | pfkey_send_x1(so, type, satype, mode, src, dst, spi, reqid, wsize, |
| 1103 | keymat, e_type, e_keylen, a_type, a_keylen, flags, |
| 1104 | l_alloc, l_bytes, l_addtime, l_usetime, seq) |
| 1105 | int so; |
| 1106 | u_int type, satype, mode; |
| 1107 | struct sockaddr *src, *dst; |
| 1108 | u_int32_t spi, reqid; |
| 1109 | u_int wsize; |
| 1110 | caddr_t keymat; |
| 1111 | u_int e_type, e_keylen, a_type, a_keylen, flags; |
| 1112 | u_int32_t l_alloc, l_bytes, l_addtime, l_usetime, seq; |
| 1113 | { |
| 1114 | struct sadb_msg *newmsg; |
| 1115 | int len; |
| 1116 | caddr_t p; |
| 1117 | int plen; |
| 1118 | caddr_t ep; |
| 1119 | |
| 1120 | /* validity check */ |
| 1121 | if (src == NULL || dst == NULL) { |
| 1122 | __ipsec_errcode = EIPSEC_INVAL_ARGUMENT; |
| 1123 | return -1; |
| 1124 | } |
| 1125 | if (src->sa_family != dst->sa_family) { |
| 1126 | __ipsec_errcode = EIPSEC_FAMILY_MISMATCH; |
| 1127 | return -1; |
| 1128 | } |
| 1129 | switch (src->sa_family) { |
| 1130 | case AF_INET: |
| 1131 | plen = sizeof(struct in_addr) << 3; |
| 1132 | break; |
| 1133 | case AF_INET6: |
| 1134 | plen = sizeof(struct in6_addr) << 3; |
| 1135 | break; |
| 1136 | default: |
| 1137 | __ipsec_errcode = EIPSEC_INVAL_FAMILY; |
| 1138 | return -1; |
| 1139 | } |
| 1140 | |
| 1141 | switch (satype) { |
| 1142 | case SADB_SATYPE_ESP: |
| 1143 | if (e_type == SADB_EALG_NONE) { |
| 1144 | __ipsec_errcode = EIPSEC_NO_ALGS; |
| 1145 | return -1; |
| 1146 | } |
| 1147 | break; |
| 1148 | case SADB_SATYPE_AH: |
| 1149 | if (e_type != SADB_EALG_NONE) { |
| 1150 | __ipsec_errcode = EIPSEC_INVAL_ALGS; |
| 1151 | return -1; |
| 1152 | } |
| 1153 | if (a_type == SADB_AALG_NONE) { |
| 1154 | __ipsec_errcode = EIPSEC_NO_ALGS; |
| 1155 | return -1; |
| 1156 | } |
| 1157 | break; |
| 1158 | case SADB_X_SATYPE_IPCOMP: |
| 1159 | if (e_type == SADB_X_CALG_NONE) { |
| 1160 | __ipsec_errcode = EIPSEC_INVAL_ALGS; |
| 1161 | return -1; |
| 1162 | } |
| 1163 | if (a_type != SADB_AALG_NONE) { |
| 1164 | __ipsec_errcode = EIPSEC_NO_ALGS; |
| 1165 | return -1; |
| 1166 | } |
| 1167 | break; |
| 1168 | default: |
| 1169 | __ipsec_errcode = EIPSEC_INVAL_SATYPE; |
| 1170 | return -1; |
| 1171 | } |
| 1172 | |
| 1173 | /* create new sadb_msg to reply. */ |
| 1174 | len = sizeof(struct sadb_msg) |
| 1175 | + sizeof(struct sadb_sa) |
| 1176 | + sizeof(struct sadb_x_sa2) |
| 1177 | + sizeof(struct sadb_address) |
| 1178 | + PFKEY_ALIGN8(src->sa_len) |
| 1179 | + sizeof(struct sadb_address) |
| 1180 | + PFKEY_ALIGN8(dst->sa_len) |
| 1181 | + sizeof(struct sadb_lifetime) |
| 1182 | + sizeof(struct sadb_lifetime); |
| 1183 | |
| 1184 | if (e_type != SADB_EALG_NONE) |
| 1185 | len += (sizeof(struct sadb_key) + PFKEY_ALIGN8(e_keylen)); |
| 1186 | if (a_type != SADB_AALG_NONE) |
| 1187 | len += (sizeof(struct sadb_key) + PFKEY_ALIGN8(a_keylen)); |
| 1188 | |
| 1189 | if ((newmsg = CALLOC(len, struct sadb_msg *)) == NULL) { |
| 1190 | __ipsec_set_strerror(strerror(errno)); |
| 1191 | return -1; |
| 1192 | } |
| 1193 | ep = ((caddr_t)newmsg) + len; |
| 1194 | |
| 1195 | p = pfkey_setsadbmsg((caddr_t)newmsg, ep, type, len, |
| 1196 | satype, seq, getpid()); |
| 1197 | if (!p) { |
| 1198 | free(newmsg); |
| 1199 | return -1; |
| 1200 | } |
| 1201 | p = pfkey_setsadbsa(p, ep, spi, wsize, a_type, e_type, flags); |
| 1202 | if (!p) { |
| 1203 | free(newmsg); |
| 1204 | return -1; |
| 1205 | } |
| 1206 | p = pfkey_setsadbxsa2(p, ep, mode, reqid); |
| 1207 | if (!p) { |
| 1208 | free(newmsg); |
| 1209 | return -1; |
| 1210 | } |
| 1211 | p = pfkey_setsadbaddr(p, ep, SADB_EXT_ADDRESS_SRC, src, plen, |
| 1212 | IPSEC_ULPROTO_ANY); |
| 1213 | if (!p) { |
| 1214 | free(newmsg); |
| 1215 | return -1; |
| 1216 | } |
| 1217 | p = pfkey_setsadbaddr(p, ep, SADB_EXT_ADDRESS_DST, dst, plen, |
| 1218 | IPSEC_ULPROTO_ANY); |
| 1219 | if (!p) { |
| 1220 | free(newmsg); |
| 1221 | return -1; |
| 1222 | } |
| 1223 | |
| 1224 | if (e_type != SADB_EALG_NONE) { |
| 1225 | p = pfkey_setsadbkey(p, ep, SADB_EXT_KEY_ENCRYPT, |
| 1226 | keymat, e_keylen); |
| 1227 | if (!p) { |
| 1228 | free(newmsg); |
| 1229 | return -1; |
| 1230 | } |
| 1231 | } |
| 1232 | if (a_type != SADB_AALG_NONE) { |
| 1233 | p = pfkey_setsadbkey(p, ep, SADB_EXT_KEY_AUTH, |
| 1234 | keymat + e_keylen, a_keylen); |
| 1235 | if (!p) { |
| 1236 | free(newmsg); |
| 1237 | return -1; |
| 1238 | } |
| 1239 | } |
| 1240 | |
| 1241 | /* set sadb_lifetime for destination */ |
| 1242 | p = pfkey_setsadblifetime(p, ep, SADB_EXT_LIFETIME_HARD, |
| 1243 | l_alloc, l_bytes, l_addtime, l_usetime); |
| 1244 | if (!p) { |
| 1245 | free(newmsg); |
| 1246 | return -1; |
| 1247 | } |
| 1248 | p = pfkey_setsadblifetime(p, ep, SADB_EXT_LIFETIME_SOFT, |
| 1249 | l_alloc, l_bytes, l_addtime, l_usetime); |
| 1250 | if (!p || p != ep) { |
| 1251 | free(newmsg); |
| 1252 | return -1; |
| 1253 | } |
| 1254 | |
| 1255 | /* send message */ |
| 1256 | len = pfkey_send(so, newmsg, len); |
| 1257 | free(newmsg); |
| 1258 | |
| 1259 | if (len < 0) |
| 1260 | return -1; |
| 1261 | |
| 1262 | __ipsec_errcode = EIPSEC_NO_ERROR; |
| 1263 | return len; |
| 1264 | } |
| 1265 | |
| 1266 | /* sending SADB_DELETE or SADB_GET message to the kernel */ |
| 1267 | static int |
| 1268 | pfkey_send_x2(so, type, satype, mode, src, dst, spi) |
| 1269 | int so; |
| 1270 | u_int type, satype, mode; |
| 1271 | struct sockaddr *src, *dst; |
| 1272 | u_int32_t spi; |
| 1273 | { |
| 1274 | struct sadb_msg *newmsg; |
| 1275 | int len; |
| 1276 | caddr_t p; |
| 1277 | int plen; |
| 1278 | caddr_t ep; |
| 1279 | |
| 1280 | /* validity check */ |
| 1281 | if (src == NULL || dst == NULL) { |
| 1282 | __ipsec_errcode = EIPSEC_INVAL_ARGUMENT; |
| 1283 | return -1; |
| 1284 | } |
| 1285 | if (src->sa_family != dst->sa_family) { |
| 1286 | __ipsec_errcode = EIPSEC_FAMILY_MISMATCH; |
| 1287 | return -1; |
| 1288 | } |
| 1289 | switch (src->sa_family) { |
| 1290 | case AF_INET: |
| 1291 | plen = sizeof(struct in_addr) << 3; |
| 1292 | break; |
| 1293 | case AF_INET6: |
| 1294 | plen = sizeof(struct in6_addr) << 3; |
| 1295 | break; |
| 1296 | default: |
| 1297 | __ipsec_errcode = EIPSEC_INVAL_FAMILY; |
| 1298 | return -1; |
| 1299 | } |
| 1300 | |
| 1301 | /* create new sadb_msg to reply. */ |
| 1302 | len = sizeof(struct sadb_msg) |
| 1303 | + sizeof(struct sadb_sa) |
| 1304 | + sizeof(struct sadb_address) |
| 1305 | + PFKEY_ALIGN8(src->sa_len) |
| 1306 | + sizeof(struct sadb_address) |
| 1307 | + PFKEY_ALIGN8(dst->sa_len); |
| 1308 | |
| 1309 | if ((newmsg = CALLOC(len, struct sadb_msg *)) == NULL) { |
| 1310 | __ipsec_set_strerror(strerror(errno)); |
| 1311 | return -1; |
| 1312 | } |
| 1313 | ep = ((caddr_t)newmsg) + len; |
| 1314 | |
| 1315 | p = pfkey_setsadbmsg((caddr_t)newmsg, ep, type, len, satype, 0, |
| 1316 | getpid()); |
| 1317 | if (!p) { |
| 1318 | free(newmsg); |
| 1319 | return -1; |
| 1320 | } |
| 1321 | p = pfkey_setsadbsa(p, ep, spi, 0, 0, 0, 0); |
| 1322 | if (!p) { |
| 1323 | free(newmsg); |
| 1324 | return -1; |
| 1325 | } |
| 1326 | p = pfkey_setsadbaddr(p, ep, SADB_EXT_ADDRESS_SRC, src, plen, |
| 1327 | IPSEC_ULPROTO_ANY); |
| 1328 | if (!p) { |
| 1329 | free(newmsg); |
| 1330 | return -1; |
| 1331 | } |
| 1332 | p = pfkey_setsadbaddr(p, ep, SADB_EXT_ADDRESS_DST, dst, plen, |
| 1333 | IPSEC_ULPROTO_ANY); |
| 1334 | if (!p || p != ep) { |
| 1335 | free(newmsg); |
| 1336 | return -1; |
| 1337 | } |
| 1338 | |
| 1339 | /* send message */ |
| 1340 | len = pfkey_send(so, newmsg, len); |
| 1341 | free(newmsg); |
| 1342 | |
| 1343 | if (len < 0) |
| 1344 | return -1; |
| 1345 | |
| 1346 | __ipsec_errcode = EIPSEC_NO_ERROR; |
| 1347 | return len; |
| 1348 | } |
| 1349 | |
| 1350 | /* |
| 1351 | * sending SADB_REGISTER, SADB_FLUSH, SADB_DUMP or SADB_X_PROMISC message |
| 1352 | * to the kernel |
| 1353 | */ |
| 1354 | static int |
| 1355 | pfkey_send_x3(so, type, satype) |
| 1356 | int so; |
| 1357 | u_int type, satype; |
| 1358 | { |
| 1359 | struct sadb_msg *newmsg; |
| 1360 | int len; |
| 1361 | caddr_t p; |
| 1362 | caddr_t ep; |
| 1363 | |
| 1364 | /* validity check */ |
| 1365 | switch (type) { |
| 1366 | case SADB_X_PROMISC: |
| 1367 | if (satype != 0 && satype != 1) { |
| 1368 | __ipsec_errcode = EIPSEC_INVAL_SATYPE; |
| 1369 | return -1; |
| 1370 | } |
| 1371 | break; |
| 1372 | default: |
| 1373 | switch (satype) { |
| 1374 | case SADB_SATYPE_UNSPEC: |
| 1375 | case SADB_SATYPE_AH: |
| 1376 | case SADB_SATYPE_ESP: |
| 1377 | case SADB_X_SATYPE_IPCOMP: |
| 1378 | break; |
| 1379 | default: |
| 1380 | __ipsec_errcode = EIPSEC_INVAL_SATYPE; |
| 1381 | return -1; |
| 1382 | } |
| 1383 | } |
| 1384 | |
| 1385 | /* create new sadb_msg to send. */ |
| 1386 | len = sizeof(struct sadb_msg); |
| 1387 | |
| 1388 | if ((newmsg = CALLOC(len, struct sadb_msg *)) == NULL) { |
| 1389 | __ipsec_set_strerror(strerror(errno)); |
| 1390 | return -1; |
| 1391 | } |
| 1392 | ep = ((caddr_t)newmsg) + len; |
| 1393 | |
| 1394 | p = pfkey_setsadbmsg((caddr_t)newmsg, ep, type, len, satype, 0, |
| 1395 | getpid()); |
| 1396 | if (!p || p != ep) { |
| 1397 | free(newmsg); |
| 1398 | return -1; |
| 1399 | } |
| 1400 | |
| 1401 | /* send message */ |
| 1402 | len = pfkey_send(so, newmsg, len); |
| 1403 | free(newmsg); |
| 1404 | |
| 1405 | if (len < 0) |
| 1406 | return -1; |
| 1407 | |
| 1408 | __ipsec_errcode = EIPSEC_NO_ERROR; |
| 1409 | return len; |
| 1410 | } |
| 1411 | |
| 1412 | /* sending SADB_X_SPDADD message to the kernel */ |
| 1413 | static int |
| 1414 | pfkey_send_x4(so, type, src, prefs, dst, prefd, proto, |
| 1415 | ltime, vtime, policy, policylen, seq) |
| 1416 | int so; |
| 1417 | struct sockaddr *src, *dst; |
| 1418 | u_int type, prefs, prefd, proto; |
| 1419 | u_int64_t ltime, vtime; |
| 1420 | char *policy; |
| 1421 | int policylen; |
| 1422 | u_int32_t seq; |
| 1423 | { |
| 1424 | struct sadb_msg *newmsg; |
| 1425 | int len; |
| 1426 | caddr_t p; |
| 1427 | int plen; |
| 1428 | caddr_t ep; |
| 1429 | |
| 1430 | /* validity check */ |
| 1431 | if (src == NULL || dst == NULL) { |
| 1432 | __ipsec_errcode = EIPSEC_INVAL_ARGUMENT; |
| 1433 | return -1; |
| 1434 | } |
| 1435 | if (src->sa_family != dst->sa_family) { |
| 1436 | __ipsec_errcode = EIPSEC_FAMILY_MISMATCH; |
| 1437 | return -1; |
| 1438 | } |
| 1439 | |
| 1440 | switch (src->sa_family) { |
| 1441 | case AF_INET: |
| 1442 | plen = sizeof(struct in_addr) << 3; |
| 1443 | break; |
| 1444 | case AF_INET6: |
| 1445 | plen = sizeof(struct in6_addr) << 3; |
| 1446 | break; |
| 1447 | default: |
| 1448 | __ipsec_errcode = EIPSEC_INVAL_FAMILY; |
| 1449 | return -1; |
| 1450 | } |
| 1451 | if (prefs > plen || prefd > plen) { |
| 1452 | __ipsec_errcode = EIPSEC_INVAL_PREFIXLEN; |
| 1453 | return -1; |
| 1454 | } |
| 1455 | |
| 1456 | /* create new sadb_msg to reply. */ |
| 1457 | len = sizeof(struct sadb_msg) |
| 1458 | + sizeof(struct sadb_address) |
| 1459 | + PFKEY_ALIGN8(src->sa_len) |
| 1460 | + sizeof(struct sadb_address) |
| 1461 | + PFKEY_ALIGN8(src->sa_len) |
| 1462 | + sizeof(struct sadb_lifetime) |
| 1463 | + policylen; |
| 1464 | |
| 1465 | if ((newmsg = CALLOC(len, struct sadb_msg *)) == NULL) { |
| 1466 | __ipsec_set_strerror(strerror(errno)); |
| 1467 | return -1; |
| 1468 | } |
| 1469 | ep = ((caddr_t)newmsg) + len; |
| 1470 | |
| 1471 | p = pfkey_setsadbmsg((caddr_t)newmsg, ep, type, len, |
| 1472 | SADB_SATYPE_UNSPEC, seq, getpid()); |
| 1473 | if (!p) { |
| 1474 | free(newmsg); |
| 1475 | return -1; |
| 1476 | } |
| 1477 | p = pfkey_setsadbaddr(p, ep, SADB_EXT_ADDRESS_SRC, src, prefs, proto); |
| 1478 | if (!p) { |
| 1479 | free(newmsg); |
| 1480 | return -1; |
| 1481 | } |
| 1482 | p = pfkey_setsadbaddr(p, ep, SADB_EXT_ADDRESS_DST, dst, prefd, proto); |
| 1483 | if (!p) { |
| 1484 | free(newmsg); |
| 1485 | return -1; |
| 1486 | } |
| 1487 | p = pfkey_setsadblifetime(p, ep, SADB_EXT_LIFETIME_HARD, |
| 1488 | 0, 0, ltime, vtime); |
| 1489 | if (!p || p + policylen != ep) { |
| 1490 | free(newmsg); |
| 1491 | return -1; |
| 1492 | } |
| 1493 | memcpy(p, policy, policylen); |
| 1494 | |
| 1495 | /* send message */ |
| 1496 | len = pfkey_send(so, newmsg, len); |
| 1497 | free(newmsg); |
| 1498 | |
| 1499 | if (len < 0) |
| 1500 | return -1; |
| 1501 | |
| 1502 | __ipsec_errcode = EIPSEC_NO_ERROR; |
| 1503 | return len; |
| 1504 | } |
| 1505 | |
| 1506 | /* sending SADB_X_SPDGET or SADB_X_SPDDELETE message to the kernel */ |
| 1507 | static int |
| 1508 | pfkey_send_x5(so, type, spid) |
| 1509 | int so; |
| 1510 | u_int type; |
| 1511 | u_int32_t spid; |
| 1512 | { |
| 1513 | struct sadb_msg *newmsg; |
| 1514 | struct sadb_x_policy xpl; |
| 1515 | int len; |
| 1516 | caddr_t p; |
| 1517 | caddr_t ep; |
| 1518 | |
| 1519 | /* create new sadb_msg to reply. */ |
| 1520 | len = sizeof(struct sadb_msg) |
| 1521 | + sizeof(xpl); |
| 1522 | |
| 1523 | if ((newmsg = CALLOC(len, struct sadb_msg *)) == NULL) { |
| 1524 | __ipsec_set_strerror(strerror(errno)); |
| 1525 | return -1; |
| 1526 | } |
| 1527 | ep = ((caddr_t)newmsg) + len; |
| 1528 | |
| 1529 | p = pfkey_setsadbmsg((caddr_t)newmsg, ep, type, len, |
| 1530 | SADB_SATYPE_UNSPEC, 0, getpid()); |
| 1531 | if (!p) { |
| 1532 | free(newmsg); |
| 1533 | return -1; |
| 1534 | } |
| 1535 | |
| 1536 | if (p + sizeof(xpl) != ep) { |
| 1537 | free(newmsg); |
| 1538 | return -1; |
| 1539 | } |
| 1540 | memset(&xpl, 0, sizeof(xpl)); |
| 1541 | xpl.sadb_x_policy_len = PFKEY_UNUNIT64(sizeof(xpl)); |
| 1542 | xpl.sadb_x_policy_exttype = SADB_X_EXT_POLICY; |
| 1543 | xpl.sadb_x_policy_id = spid; |
| 1544 | memcpy(p, &xpl, sizeof(xpl)); |
| 1545 | |
| 1546 | /* send message */ |
| 1547 | len = pfkey_send(so, newmsg, len); |
| 1548 | free(newmsg); |
| 1549 | |
| 1550 | if (len < 0) |
| 1551 | return -1; |
| 1552 | |
| 1553 | __ipsec_errcode = EIPSEC_NO_ERROR; |
| 1554 | return len; |
| 1555 | } |
| 1556 | |
| 1557 | /* |
| 1558 | * open a socket. |
| 1559 | * OUT: |
| 1560 | * -1: fail. |
| 1561 | * others : success and return value of socket. |
| 1562 | */ |
| 1563 | int |
| 1564 | pfkey_open() |
| 1565 | { |
| 1566 | int so; |
| 1567 | const int bufsiz = 128 * 1024; /*is 128K enough?*/ |
| 1568 | |
| 1569 | if ((so = socket(PF_KEY, SOCK_RAW, PF_KEY_V2)) < 0) { |
| 1570 | __ipsec_set_strerror(strerror(errno)); |
| 1571 | return -1; |
| 1572 | } |
| 1573 | |
| 1574 | /* |
| 1575 | * This is a temporary workaround for KAME PR 154. |
| 1576 | * Don't really care even if it fails. |
| 1577 | */ |
| 1578 | (void)setsockopt(so, SOL_SOCKET, SO_SNDBUF, &bufsiz, sizeof(bufsiz)); |
| 1579 | (void)setsockopt(so, SOL_SOCKET, SO_RCVBUF, &bufsiz, sizeof(bufsiz)); |
| 1580 | |
| 1581 | __ipsec_errcode = EIPSEC_NO_ERROR; |
| 1582 | return so; |
| 1583 | } |
| 1584 | |
| 1585 | /* |
| 1586 | * close a socket. |
| 1587 | * OUT: |
| 1588 | * 0: success. |
| 1589 | * -1: fail. |
| 1590 | */ |
| 1591 | void |
| 1592 | pfkey_close(so) |
| 1593 | int so; |
| 1594 | { |
| 1595 | (void)close(so); |
| 1596 | |
| 1597 | __ipsec_errcode = EIPSEC_NO_ERROR; |
| 1598 | return; |
| 1599 | } |
| 1600 | |
| 1601 | /* |
| 1602 | * receive sadb_msg data, and return pointer to new buffer allocated. |
| 1603 | * Must free this buffer later. |
| 1604 | * OUT: |
| 1605 | * NULL : error occured. |
| 1606 | * others : a pointer to sadb_msg structure. |
| 1607 | * |
| 1608 | * XXX should be rewritten to pass length explicitly |
| 1609 | */ |
| 1610 | struct sadb_msg * |
| 1611 | pfkey_recv(so) |
| 1612 | int so; |
| 1613 | { |
| 1614 | struct sadb_msg buf, *newmsg; |
| 1615 | int len, reallen; |
| 1616 | |
| 1617 | while ((len = recv(so, (caddr_t)&buf, sizeof(buf), MSG_PEEK)) < 0) { |
| 1618 | if (errno == EINTR) |
| 1619 | continue; |
| 1620 | __ipsec_set_strerror(strerror(errno)); |
| 1621 | return NULL; |
| 1622 | } |
| 1623 | |
| 1624 | if (len < sizeof(buf)) { |
| 1625 | recv(so, (caddr_t)&buf, sizeof(buf), 0); |
| 1626 | __ipsec_errcode = EIPSEC_MAX; |
| 1627 | return NULL; |
| 1628 | } |
| 1629 | |
| 1630 | /* read real message */ |
| 1631 | reallen = PFKEY_UNUNIT64(buf.sadb_msg_len); |
| 1632 | if ((newmsg = CALLOC(reallen, struct sadb_msg *)) == 0) { |
| 1633 | __ipsec_set_strerror(strerror(errno)); |
| 1634 | return NULL; |
| 1635 | } |
| 1636 | |
| 1637 | while ((len = recv(so, (caddr_t)newmsg, reallen, 0)) < 0) { |
| 1638 | if (errno == EINTR) |
| 1639 | continue; |
| 1640 | __ipsec_set_strerror(strerror(errno)); |
| 1641 | free(newmsg); |
| 1642 | return NULL; |
| 1643 | } |
| 1644 | |
| 1645 | if (len != reallen) { |
| 1646 | __ipsec_errcode = EIPSEC_SYSTEM_ERROR; |
| 1647 | free(newmsg); |
| 1648 | return NULL; |
| 1649 | } |
| 1650 | |
| 1651 | /* don't trust what the kernel says, validate! */ |
| 1652 | if (PFKEY_UNUNIT64(newmsg->sadb_msg_len) != len) { |
| 1653 | __ipsec_errcode = EIPSEC_SYSTEM_ERROR; |
| 1654 | free(newmsg); |
| 1655 | return NULL; |
| 1656 | } |
| 1657 | |
| 1658 | __ipsec_errcode = EIPSEC_NO_ERROR; |
| 1659 | return newmsg; |
| 1660 | } |
| 1661 | |
| 1662 | /* |
| 1663 | * send message to a socket. |
| 1664 | * OUT: |
| 1665 | * others: success and return length sent. |
| 1666 | * -1 : fail. |
| 1667 | */ |
| 1668 | int |
| 1669 | pfkey_send(so, msg, len) |
| 1670 | int so; |
| 1671 | struct sadb_msg *msg; |
| 1672 | int len; |
| 1673 | { |
| 1674 | if ((len = send(so, (caddr_t)msg, len, 0)) < 0) { |
| 1675 | __ipsec_set_strerror(strerror(errno)); |
| 1676 | return -1; |
| 1677 | } |
| 1678 | |
| 1679 | __ipsec_errcode = EIPSEC_NO_ERROR; |
| 1680 | return len; |
| 1681 | } |
| 1682 | |
| 1683 | /* |
| 1684 | * %%% Utilities |
| 1685 | * NOTE: These functions are derived from netkey/key.c in KAME. |
| 1686 | */ |
| 1687 | /* |
| 1688 | * set the pointer to each header in this message buffer. |
| 1689 | * IN: msg: pointer to message buffer. |
| 1690 | * mhp: pointer to the buffer initialized like below: |
| 1691 | * caddr_t mhp[SADB_EXT_MAX + 1]; |
| 1692 | * OUT: -1: invalid. |
| 1693 | * 0: valid. |
| 1694 | * |
| 1695 | * XXX should be rewritten to obtain length explicitly |
| 1696 | */ |
| 1697 | int |
| 1698 | pfkey_align(msg, mhp) |
| 1699 | struct sadb_msg *msg; |
| 1700 | caddr_t *mhp; |
| 1701 | { |
| 1702 | struct sadb_ext *ext; |
| 1703 | int i; |
| 1704 | caddr_t p; |
| 1705 | caddr_t ep; /* XXX should be passed from upper layer */ |
| 1706 | |
| 1707 | /* validity check */ |
| 1708 | if (msg == NULL || mhp == NULL) { |
| 1709 | __ipsec_errcode = EIPSEC_INVAL_ARGUMENT; |
| 1710 | return -1; |
| 1711 | } |
| 1712 | |
| 1713 | /* initialize */ |
| 1714 | for (i = 0; i < SADB_EXT_MAX + 1; i++) |
| 1715 | mhp[i] = NULL; |
| 1716 | |
| 1717 | mhp[0] = (caddr_t)msg; |
| 1718 | |
| 1719 | /* initialize */ |
| 1720 | p = (caddr_t) msg; |
| 1721 | ep = p + PFKEY_UNUNIT64(msg->sadb_msg_len); |
| 1722 | |
| 1723 | /* skip base header */ |
| 1724 | p += sizeof(struct sadb_msg); |
| 1725 | |
| 1726 | while (p < ep) { |
| 1727 | ext = (struct sadb_ext *)p; |
| 1728 | if (ep < p + sizeof(*ext) || PFKEY_EXTLEN(ext) < sizeof(*ext) || |
| 1729 | ep < p + PFKEY_EXTLEN(ext)) { |
| 1730 | /* invalid format */ |
| 1731 | break; |
| 1732 | } |
| 1733 | |
| 1734 | /* duplicate check */ |
| 1735 | /* XXX Are there duplication either KEY_AUTH or KEY_ENCRYPT ?*/ |
| 1736 | if (mhp[ext->sadb_ext_type] != NULL) { |
| 1737 | __ipsec_errcode = EIPSEC_INVAL_EXTTYPE; |
| 1738 | return -1; |
| 1739 | } |
| 1740 | |
| 1741 | /* set pointer */ |
| 1742 | switch (ext->sadb_ext_type) { |
| 1743 | case SADB_EXT_SA: |
| 1744 | case SADB_EXT_LIFETIME_CURRENT: |
| 1745 | case SADB_EXT_LIFETIME_HARD: |
| 1746 | case SADB_EXT_LIFETIME_SOFT: |
| 1747 | case SADB_EXT_ADDRESS_SRC: |
| 1748 | case SADB_EXT_ADDRESS_DST: |
| 1749 | case SADB_EXT_ADDRESS_PROXY: |
| 1750 | case SADB_EXT_KEY_AUTH: |
| 1751 | /* XXX should to be check weak keys. */ |
| 1752 | case SADB_EXT_KEY_ENCRYPT: |
| 1753 | /* XXX should to be check weak keys. */ |
| 1754 | case SADB_EXT_IDENTITY_SRC: |
| 1755 | case SADB_EXT_IDENTITY_DST: |
| 1756 | case SADB_EXT_SENSITIVITY: |
| 1757 | case SADB_EXT_PROPOSAL: |
| 1758 | case SADB_EXT_SUPPORTED_AUTH: |
| 1759 | case SADB_EXT_SUPPORTED_ENCRYPT: |
| 1760 | case SADB_EXT_SPIRANGE: |
| 1761 | case SADB_X_EXT_POLICY: |
| 1762 | case SADB_X_EXT_SA2: |
| 1763 | mhp[ext->sadb_ext_type] = (caddr_t)ext; |
| 1764 | break; |
| 1765 | default: |
| 1766 | __ipsec_errcode = EIPSEC_INVAL_EXTTYPE; |
| 1767 | return -1; |
| 1768 | } |
| 1769 | |
| 1770 | p += PFKEY_EXTLEN(ext); |
| 1771 | } |
| 1772 | |
| 1773 | if (p != ep) { |
| 1774 | __ipsec_errcode = EIPSEC_INVAL_SADBMSG; |
| 1775 | return -1; |
| 1776 | } |
| 1777 | |
| 1778 | __ipsec_errcode = EIPSEC_NO_ERROR; |
| 1779 | return 0; |
| 1780 | } |
| 1781 | |
| 1782 | /* |
| 1783 | * check basic usage for sadb_msg, |
| 1784 | * NOTE: This routine is derived from netkey/key.c in KAME. |
| 1785 | * IN: msg: pointer to message buffer. |
| 1786 | * mhp: pointer to the buffer initialized like below: |
| 1787 | * |
| 1788 | * caddr_t mhp[SADB_EXT_MAX + 1]; |
| 1789 | * |
| 1790 | * OUT: -1: invalid. |
| 1791 | * 0: valid. |
| 1792 | */ |
| 1793 | int |
| 1794 | pfkey_check(mhp) |
| 1795 | caddr_t *mhp; |
| 1796 | { |
| 1797 | struct sadb_msg *msg; |
| 1798 | |
| 1799 | /* validity check */ |
| 1800 | if (mhp == NULL || mhp[0] == NULL) { |
| 1801 | __ipsec_errcode = EIPSEC_INVAL_ARGUMENT; |
| 1802 | return -1; |
| 1803 | } |
| 1804 | |
| 1805 | msg = (struct sadb_msg *)mhp[0]; |
| 1806 | |
| 1807 | /* check version */ |
| 1808 | if (msg->sadb_msg_version != PF_KEY_V2) { |
| 1809 | __ipsec_errcode = EIPSEC_INVAL_VERSION; |
| 1810 | return -1; |
| 1811 | } |
| 1812 | |
| 1813 | /* check type */ |
| 1814 | if (msg->sadb_msg_type > SADB_MAX) { |
| 1815 | __ipsec_errcode = EIPSEC_INVAL_MSGTYPE; |
| 1816 | return -1; |
| 1817 | } |
| 1818 | |
| 1819 | /* check SA type */ |
| 1820 | switch (msg->sadb_msg_satype) { |
| 1821 | case SADB_SATYPE_UNSPEC: |
| 1822 | switch (msg->sadb_msg_type) { |
| 1823 | case SADB_GETSPI: |
| 1824 | case SADB_UPDATE: |
| 1825 | case SADB_ADD: |
| 1826 | case SADB_DELETE: |
| 1827 | case SADB_GET: |
| 1828 | case SADB_ACQUIRE: |
| 1829 | case SADB_EXPIRE: |
| 1830 | __ipsec_errcode = EIPSEC_INVAL_SATYPE; |
| 1831 | return -1; |
| 1832 | } |
| 1833 | break; |
| 1834 | case SADB_SATYPE_ESP: |
| 1835 | case SADB_SATYPE_AH: |
| 1836 | case SADB_X_SATYPE_IPCOMP: |
| 1837 | switch (msg->sadb_msg_type) { |
| 1838 | case SADB_X_SPDADD: |
| 1839 | case SADB_X_SPDDELETE: |
| 1840 | case SADB_X_SPDGET: |
| 1841 | case SADB_X_SPDDUMP: |
| 1842 | case SADB_X_SPDFLUSH: |
| 1843 | __ipsec_errcode = EIPSEC_INVAL_SATYPE; |
| 1844 | return -1; |
| 1845 | } |
| 1846 | break; |
| 1847 | case SADB_SATYPE_RSVP: |
| 1848 | case SADB_SATYPE_OSPFV2: |
| 1849 | case SADB_SATYPE_RIPV2: |
| 1850 | case SADB_SATYPE_MIP: |
| 1851 | __ipsec_errcode = EIPSEC_NOT_SUPPORTED; |
| 1852 | return -1; |
| 1853 | case 1: /* XXX: What does it do ? */ |
| 1854 | if (msg->sadb_msg_type == SADB_X_PROMISC) |
| 1855 | break; |
| 1856 | /*FALLTHROUGH*/ |
| 1857 | default: |
| 1858 | __ipsec_errcode = EIPSEC_INVAL_SATYPE; |
| 1859 | return -1; |
| 1860 | } |
| 1861 | |
| 1862 | /* check field of upper layer protocol and address family */ |
| 1863 | if (mhp[SADB_EXT_ADDRESS_SRC] != NULL |
| 1864 | && mhp[SADB_EXT_ADDRESS_DST] != NULL) { |
| 1865 | struct sadb_address *src0, *dst0; |
| 1866 | |
| 1867 | src0 = (struct sadb_address *)(mhp[SADB_EXT_ADDRESS_SRC]); |
| 1868 | dst0 = (struct sadb_address *)(mhp[SADB_EXT_ADDRESS_DST]); |
| 1869 | |
| 1870 | if (src0->sadb_address_proto != dst0->sadb_address_proto) { |
| 1871 | __ipsec_errcode = EIPSEC_PROTO_MISMATCH; |
| 1872 | return -1; |
| 1873 | } |
| 1874 | |
| 1875 | if (PFKEY_ADDR_SADDR(src0)->sa_family |
| 1876 | != PFKEY_ADDR_SADDR(dst0)->sa_family) { |
| 1877 | __ipsec_errcode = EIPSEC_FAMILY_MISMATCH; |
| 1878 | return -1; |
| 1879 | } |
| 1880 | |
| 1881 | switch (PFKEY_ADDR_SADDR(src0)->sa_family) { |
| 1882 | case AF_INET: |
| 1883 | case AF_INET6: |
| 1884 | break; |
| 1885 | default: |
| 1886 | __ipsec_errcode = EIPSEC_INVAL_FAMILY; |
| 1887 | return -1; |
| 1888 | } |
| 1889 | |
| 1890 | /* |
| 1891 | * prefixlen == 0 is valid because there must be the case |
| 1892 | * all addresses are matched. |
| 1893 | */ |
| 1894 | } |
| 1895 | |
| 1896 | __ipsec_errcode = EIPSEC_NO_ERROR; |
| 1897 | return 0; |
| 1898 | } |
| 1899 | |
| 1900 | /* |
| 1901 | * set data into sadb_msg. |
| 1902 | * `buf' must has been allocated sufficiently. |
| 1903 | */ |
| 1904 | static caddr_t |
| 1905 | pfkey_setsadbmsg(buf, lim, type, tlen, satype, seq, pid) |
| 1906 | caddr_t buf; |
| 1907 | caddr_t lim; |
| 1908 | u_int type, satype; |
| 1909 | u_int tlen; |
| 1910 | u_int32_t seq; |
| 1911 | pid_t pid; |
| 1912 | { |
| 1913 | struct sadb_msg *p; |
| 1914 | u_int len; |
| 1915 | |
| 1916 | p = (struct sadb_msg *)buf; |
| 1917 | len = sizeof(struct sadb_msg); |
| 1918 | |
| 1919 | if (buf + len > lim) |
| 1920 | return NULL; |
| 1921 | |
| 1922 | memset(p, 0, len); |
| 1923 | p->sadb_msg_version = PF_KEY_V2; |
| 1924 | p->sadb_msg_type = type; |
| 1925 | p->sadb_msg_errno = 0; |
| 1926 | p->sadb_msg_satype = satype; |
| 1927 | p->sadb_msg_len = PFKEY_UNIT64(tlen); |
| 1928 | p->sadb_msg_reserved = 0; |
| 1929 | p->sadb_msg_seq = seq; |
| 1930 | p->sadb_msg_pid = (u_int32_t)pid; |
| 1931 | |
| 1932 | return(buf + len); |
| 1933 | } |
| 1934 | |
| 1935 | /* |
| 1936 | * copy secasvar data into sadb_address. |
| 1937 | * `buf' must has been allocated sufficiently. |
| 1938 | */ |
| 1939 | static caddr_t |
| 1940 | pfkey_setsadbsa(buf, lim, spi, wsize, auth, enc, flags) |
| 1941 | caddr_t buf; |
| 1942 | caddr_t lim; |
| 1943 | u_int32_t spi, flags; |
| 1944 | u_int wsize, auth, enc; |
| 1945 | { |
| 1946 | struct sadb_sa *p; |
| 1947 | u_int len; |
| 1948 | |
| 1949 | p = (struct sadb_sa *)buf; |
| 1950 | len = sizeof(struct sadb_sa); |
| 1951 | |
| 1952 | if (buf + len > lim) |
| 1953 | return NULL; |
| 1954 | |
| 1955 | memset(p, 0, len); |
| 1956 | p->sadb_sa_len = PFKEY_UNIT64(len); |
| 1957 | p->sadb_sa_exttype = SADB_EXT_SA; |
| 1958 | p->sadb_sa_spi = spi; |
| 1959 | p->sadb_sa_replay = wsize; |
| 1960 | p->sadb_sa_state = SADB_SASTATE_LARVAL; |
| 1961 | p->sadb_sa_auth = auth; |
| 1962 | p->sadb_sa_encrypt = enc; |
| 1963 | p->sadb_sa_flags = flags; |
| 1964 | |
| 1965 | return(buf + len); |
| 1966 | } |
| 1967 | |
| 1968 | /* |
| 1969 | * set data into sadb_address. |
| 1970 | * `buf' must has been allocated sufficiently. |
| 1971 | * prefixlen is in bits. |
| 1972 | */ |
| 1973 | static caddr_t |
| 1974 | pfkey_setsadbaddr(buf, lim, exttype, saddr, prefixlen, ul_proto) |
| 1975 | caddr_t buf; |
| 1976 | caddr_t lim; |
| 1977 | u_int exttype; |
| 1978 | struct sockaddr *saddr; |
| 1979 | u_int prefixlen; |
| 1980 | u_int ul_proto; |
| 1981 | { |
| 1982 | struct sadb_address *p; |
| 1983 | u_int len; |
| 1984 | |
| 1985 | p = (struct sadb_address *)buf; |
| 1986 | len = sizeof(struct sadb_address) + PFKEY_ALIGN8(saddr->sa_len); |
| 1987 | |
| 1988 | if (buf + len > lim) |
| 1989 | return NULL; |
| 1990 | |
| 1991 | memset(p, 0, len); |
| 1992 | p->sadb_address_len = PFKEY_UNIT64(len); |
| 1993 | p->sadb_address_exttype = exttype & 0xffff; |
| 1994 | p->sadb_address_proto = ul_proto & 0xff; |
| 1995 | p->sadb_address_prefixlen = prefixlen; |
| 1996 | p->sadb_address_reserved = 0; |
| 1997 | |
| 1998 | memcpy(p + 1, saddr, saddr->sa_len); |
| 1999 | |
| 2000 | return(buf + len); |
| 2001 | } |
| 2002 | |
| 2003 | /* |
| 2004 | * set sadb_key structure after clearing buffer with zero. |
| 2005 | * OUT: the pointer of buf + len. |
| 2006 | */ |
| 2007 | static caddr_t |
| 2008 | pfkey_setsadbkey(buf, lim, type, key, keylen) |
| 2009 | caddr_t buf; |
| 2010 | caddr_t lim; |
| 2011 | caddr_t key; |
| 2012 | u_int type, keylen; |
| 2013 | { |
| 2014 | struct sadb_key *p; |
| 2015 | u_int len; |
| 2016 | |
| 2017 | p = (struct sadb_key *)buf; |
| 2018 | len = sizeof(struct sadb_key) + PFKEY_ALIGN8(keylen); |
| 2019 | |
| 2020 | if (buf + len > lim) |
| 2021 | return NULL; |
| 2022 | |
| 2023 | memset(p, 0, len); |
| 2024 | p->sadb_key_len = PFKEY_UNIT64(len); |
| 2025 | p->sadb_key_exttype = type; |
| 2026 | p->sadb_key_bits = keylen << 3; |
| 2027 | p->sadb_key_reserved = 0; |
| 2028 | |
| 2029 | memcpy(p + 1, key, keylen); |
| 2030 | |
| 2031 | return buf + len; |
| 2032 | } |
| 2033 | |
| 2034 | /* |
| 2035 | * set sadb_lifetime structure after clearing buffer with zero. |
| 2036 | * OUT: the pointer of buf + len. |
| 2037 | */ |
| 2038 | static caddr_t |
| 2039 | pfkey_setsadblifetime(buf, lim, type, l_alloc, l_bytes, l_addtime, l_usetime) |
| 2040 | caddr_t buf; |
| 2041 | caddr_t lim; |
| 2042 | u_int type; |
| 2043 | u_int32_t l_alloc, l_bytes, l_addtime, l_usetime; |
| 2044 | { |
| 2045 | struct sadb_lifetime *p; |
| 2046 | u_int len; |
| 2047 | |
| 2048 | p = (struct sadb_lifetime *)buf; |
| 2049 | len = sizeof(struct sadb_lifetime); |
| 2050 | |
| 2051 | if (buf + len > lim) |
| 2052 | return NULL; |
| 2053 | |
| 2054 | memset(p, 0, len); |
| 2055 | p->sadb_lifetime_len = PFKEY_UNIT64(len); |
| 2056 | p->sadb_lifetime_exttype = type; |
| 2057 | |
| 2058 | switch (type) { |
| 2059 | case SADB_EXT_LIFETIME_SOFT: |
| 2060 | p->sadb_lifetime_allocations |
| 2061 | = (l_alloc * soft_lifetime_allocations_rate) /100; |
| 2062 | p->sadb_lifetime_bytes |
| 2063 | = (l_bytes * soft_lifetime_bytes_rate) /100; |
| 2064 | p->sadb_lifetime_addtime |
| 2065 | = (l_addtime * soft_lifetime_addtime_rate) /100; |
| 2066 | p->sadb_lifetime_usetime |
| 2067 | = (l_usetime * soft_lifetime_usetime_rate) /100; |
| 2068 | break; |
| 2069 | case SADB_EXT_LIFETIME_HARD: |
| 2070 | p->sadb_lifetime_allocations = l_alloc; |
| 2071 | p->sadb_lifetime_bytes = l_bytes; |
| 2072 | p->sadb_lifetime_addtime = l_addtime; |
| 2073 | p->sadb_lifetime_usetime = l_usetime; |
| 2074 | break; |
| 2075 | } |
| 2076 | |
| 2077 | return buf + len; |
| 2078 | } |
| 2079 | |
| 2080 | /* |
| 2081 | * copy secasvar data into sadb_address. |
| 2082 | * `buf' must has been allocated sufficiently. |
| 2083 | */ |
| 2084 | static caddr_t |
| 2085 | pfkey_setsadbxsa2(buf, lim, mode0, reqid) |
| 2086 | caddr_t buf; |
| 2087 | caddr_t lim; |
| 2088 | u_int32_t mode0; |
| 2089 | u_int32_t reqid; |
| 2090 | { |
| 2091 | struct sadb_x_sa2 *p; |
| 2092 | u_int8_t mode = mode0 & 0xff; |
| 2093 | u_int len; |
| 2094 | |
| 2095 | p = (struct sadb_x_sa2 *)buf; |
| 2096 | len = sizeof(struct sadb_x_sa2); |
| 2097 | |
| 2098 | if (buf + len > lim) |
| 2099 | return NULL; |
| 2100 | |
| 2101 | memset(p, 0, len); |
| 2102 | p->sadb_x_sa2_len = PFKEY_UNIT64(len); |
| 2103 | p->sadb_x_sa2_exttype = SADB_X_EXT_SA2; |
| 2104 | p->sadb_x_sa2_mode = mode; |
| 2105 | p->sadb_x_sa2_reqid = reqid; |
| 2106 | |
| 2107 | return(buf + len); |
| 2108 | } |