ipsec.c revision 1.4
1 /* $NetBSD: ipsec.c,v 1.4 2003/10/06 22:05:15 tls Exp $ */ 2 /* $FreeBSD: /usr/local/www/cvsroot/FreeBSD/src/sys/netipsec/ipsec.c,v 1.2.2.2 2003/07/01 01:38:13 sam Exp $ */ 3 /* $KAME: ipsec.c,v 1.103 2001/05/24 07:14:18 sakane Exp $ */ 4 5 /* 6 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 7 * All rights reserved. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. Neither the name of the project nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #include <sys/cdefs.h> 35 __KERNEL_RCSID(0, "$NetBSD: ipsec.c,v 1.4 2003/10/06 22:05:15 tls Exp $"); 36 37 /* 38 * IPsec controller part. 39 */ 40 41 #include "opt_inet.h" 42 #ifdef __FreeBSD__ 43 #include "opt_inet6.h" 44 #endif 45 #include "opt_ipsec.h" 46 47 #include <sys/param.h> 48 #include <sys/systm.h> 49 #include <sys/malloc.h> 50 #include <sys/mbuf.h> 51 #include <sys/domain.h> 52 #include <sys/protosw.h> 53 #include <sys/socket.h> 54 #include <sys/socketvar.h> 55 #include <sys/errno.h> 56 #include <sys/time.h> 57 #include <sys/kernel.h> 58 #include <sys/syslog.h> 59 #include <sys/sysctl.h> 60 #include <sys/proc.h> 61 62 #include <net/if.h> 63 #include <net/route.h> 64 65 #include <netinet/in.h> 66 #include <netinet/in_systm.h> 67 #include <netinet/ip.h> 68 #include <netinet/ip_var.h> 69 #include <netinet/in_var.h> 70 #include <netinet/udp.h> 71 #include <netinet/udp_var.h> 72 #include <netinet/tcp.h> 73 #include <netinet/udp.h> 74 75 #include <netinet/ip6.h> 76 #ifdef INET6 77 #include <netinet6/ip6_var.h> 78 #endif 79 #include <netinet/in_pcb.h> 80 #ifdef INET6 81 #include <netinet/icmp6.h> 82 #endif 83 84 #include <netipsec/ipsec.h> 85 #ifdef INET6 86 #include <netipsec/ipsec6.h> 87 #endif 88 #include <netipsec/ah_var.h> 89 #include <netipsec/esp_var.h> 90 #include <netipsec/ipcomp.h> /*XXX*/ 91 #include <netipsec/ipcomp_var.h> 92 93 #include <netipsec/key.h> 94 #include <netipsec/keydb.h> 95 #include <netipsec/key_debug.h> 96 97 #include <netipsec/xform.h> 98 99 #include <netipsec/ipsec_osdep.h> 100 101 #include <net/net_osdep.h> 102 103 #ifdef IPSEC_DEBUG 104 int ipsec_debug = 1; 105 #else 106 int ipsec_debug = 0; 107 #endif 108 109 /* NB: name changed so netstat doesn't use it */ 110 struct newipsecstat newipsecstat; 111 int ip4_ah_offsetmask = 0; /* maybe IP_DF? */ 112 int ip4_ipsec_dfbit = 0; /* DF bit on encap. 0: clear 1: set 2: copy */ 113 int ip4_esp_trans_deflev = IPSEC_LEVEL_USE; 114 int ip4_esp_net_deflev = IPSEC_LEVEL_USE; 115 int ip4_ah_trans_deflev = IPSEC_LEVEL_USE; 116 int ip4_ah_net_deflev = IPSEC_LEVEL_USE; 117 struct secpolicy ip4_def_policy; 118 int ip4_ipsec_ecn = 0; /* ECN ignore(-1)/forbidden(0)/allowed(1) */ 119 int ip4_esp_randpad = -1; 120 /* 121 * Crypto support requirements: 122 * 123 * 1 require hardware support 124 * -1 require software support 125 * 0 take anything 126 */ 127 int crypto_support = 0; 128 129 #ifdef __FreeBSD__ 130 SYSCTL_DECL(_net_inet_ipsec); 131 132 /* net.inet.ipsec */ 133 SYSCTL_INT(_net_inet_ipsec, IPSECCTL_DEF_POLICY, 134 def_policy, CTLFLAG_RW, &ip4_def_policy.policy, 0, ""); 135 SYSCTL_INT(_net_inet_ipsec, IPSECCTL_DEF_ESP_TRANSLEV, esp_trans_deflev, 136 CTLFLAG_RW, &ip4_esp_trans_deflev, 0, ""); 137 SYSCTL_INT(_net_inet_ipsec, IPSECCTL_DEF_ESP_NETLEV, esp_net_deflev, 138 CTLFLAG_RW, &ip4_esp_net_deflev, 0, ""); 139 SYSCTL_INT(_net_inet_ipsec, IPSECCTL_DEF_AH_TRANSLEV, ah_trans_deflev, 140 CTLFLAG_RW, &ip4_ah_trans_deflev, 0, ""); 141 SYSCTL_INT(_net_inet_ipsec, IPSECCTL_DEF_AH_NETLEV, ah_net_deflev, 142 CTLFLAG_RW, &ip4_ah_net_deflev, 0, ""); 143 SYSCTL_INT(_net_inet_ipsec, IPSECCTL_AH_CLEARTOS, 144 ah_cleartos, CTLFLAG_RW, &ah_cleartos, 0, ""); 145 SYSCTL_INT(_net_inet_ipsec, IPSECCTL_AH_OFFSETMASK, 146 ah_offsetmask, CTLFLAG_RW, &ip4_ah_offsetmask, 0, ""); 147 SYSCTL_INT(_net_inet_ipsec, IPSECCTL_DFBIT, 148 dfbit, CTLFLAG_RW, &ip4_ipsec_dfbit, 0, ""); 149 SYSCTL_INT(_net_inet_ipsec, IPSECCTL_ECN, 150 ecn, CTLFLAG_RW, &ip4_ipsec_ecn, 0, ""); 151 SYSCTL_INT(_net_inet_ipsec, IPSECCTL_DEBUG, 152 debug, CTLFLAG_RW, &ipsec_debug, 0, ""); 153 SYSCTL_INT(_net_inet_ipsec, IPSECCTL_ESP_RANDPAD, 154 esp_randpad, CTLFLAG_RW, &ip4_esp_randpad, 0, ""); 155 SYSCTL_INT(_net_inet_ipsec, OID_AUTO, 156 crypto_support, CTLFLAG_RW, &crypto_support,0, ""); 157 SYSCTL_STRUCT(_net_inet_ipsec, OID_AUTO, 158 ipsecstats, CTLFLAG_RD, &newipsecstat, newipsecstat, ""); 159 #endif /* __FreeBSD__ */ 160 161 162 #ifdef INET6 163 int ip6_esp_trans_deflev = IPSEC_LEVEL_USE; 164 int ip6_esp_net_deflev = IPSEC_LEVEL_USE; 165 int ip6_ah_trans_deflev = IPSEC_LEVEL_USE; 166 int ip6_ah_net_deflev = IPSEC_LEVEL_USE; 167 int ip6_ipsec_ecn = 0; /* ECN ignore(-1)/forbidden(0)/allowed(1) */ 168 int ip6_esp_randpad = -1; 169 170 SYSCTL_DECL(_net_inet6_ipsec6); 171 172 /* net.inet6.ipsec6 */ 173 #ifdef COMPAT_KAME 174 SYSCTL_OID(_net_inet6_ipsec6, IPSECCTL_STATS, stats, CTLFLAG_RD, 175 0,0, compat_ipsecstats_sysctl, "S", ""); 176 #endif /* COMPAT_KAME */ 177 SYSCTL_INT(_net_inet6_ipsec6, IPSECCTL_DEF_POLICY, 178 def_policy, CTLFLAG_RW, &ip4_def_policy.policy, 0, ""); 179 SYSCTL_INT(_net_inet6_ipsec6, IPSECCTL_DEF_ESP_TRANSLEV, esp_trans_deflev, 180 CTLFLAG_RW, &ip6_esp_trans_deflev, 0, ""); 181 SYSCTL_INT(_net_inet6_ipsec6, IPSECCTL_DEF_ESP_NETLEV, esp_net_deflev, 182 CTLFLAG_RW, &ip6_esp_net_deflev, 0, ""); 183 SYSCTL_INT(_net_inet6_ipsec6, IPSECCTL_DEF_AH_TRANSLEV, ah_trans_deflev, 184 CTLFLAG_RW, &ip6_ah_trans_deflev, 0, ""); 185 SYSCTL_INT(_net_inet6_ipsec6, IPSECCTL_DEF_AH_NETLEV, ah_net_deflev, 186 CTLFLAG_RW, &ip6_ah_net_deflev, 0, ""); 187 SYSCTL_INT(_net_inet6_ipsec6, IPSECCTL_ECN, 188 ecn, CTLFLAG_RW, &ip6_ipsec_ecn, 0, ""); 189 SYSCTL_INT(_net_inet6_ipsec6, IPSECCTL_DEBUG, 190 debug, CTLFLAG_RW, &ipsec_debug, 0, ""); 191 SYSCTL_INT(_net_inet6_ipsec6, IPSECCTL_ESP_RANDPAD, 192 esp_randpad, CTLFLAG_RW, &ip6_esp_randpad, 0, ""); 193 #endif /* INET6 */ 194 195 static int ipsec4_setspidx_inpcb __P((struct mbuf *, struct inpcb *pcb)); 196 #ifdef INET6 197 static int ipsec6_setspidx_in6pcb __P((struct mbuf *, struct in6pcb *pcb)); 198 #endif 199 static int ipsec_setspidx __P((struct mbuf *, struct secpolicyindex *, int)); 200 static void ipsec4_get_ulp __P((struct mbuf *m, struct secpolicyindex *, int)); 201 static int ipsec4_setspidx_ipaddr __P((struct mbuf *, struct secpolicyindex *)); 202 #ifdef INET6 203 static void ipsec6_get_ulp __P((struct mbuf *m, struct secpolicyindex *, int)); 204 static int ipsec6_setspidx_ipaddr __P((struct mbuf *, struct secpolicyindex *)); 205 #endif 206 static void ipsec_delpcbpolicy __P((struct inpcbpolicy *)); 207 static struct secpolicy *ipsec_deepcopy_policy __P((struct secpolicy *src)); 208 static int ipsec_set_policy __P((struct secpolicy **pcb_sp, 209 int optname, caddr_t request, size_t len, int priv)); 210 static int ipsec_get_policy __P((struct secpolicy *pcb_sp, struct mbuf **mp)); 211 static void vshiftl __P((unsigned char *, int, int)); 212 static size_t ipsec_hdrsiz __P((struct secpolicy *)); 213 214 /* 215 * Return a held reference to the default SP. 216 */ 217 static struct secpolicy * 218 key_allocsp_default(const char* where, int tag) 219 { 220 struct secpolicy *sp; 221 222 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 223 printf("DP key_allocsp_default from %s:%u\n", where, tag)); 224 225 sp = &ip4_def_policy; 226 if (sp->policy != IPSEC_POLICY_DISCARD && 227 sp->policy != IPSEC_POLICY_NONE) { 228 ipseclog((LOG_INFO, "fixed system default policy: %d->%d\n", 229 sp->policy, IPSEC_POLICY_NONE)); 230 sp->policy = IPSEC_POLICY_NONE; 231 } 232 sp->refcnt++; 233 234 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 235 printf("DP key_allocsp_default returns SP:%p (%u)\n", 236 sp, sp->refcnt)); 237 return sp; 238 } 239 #define KEY_ALLOCSP_DEFAULT() \ 240 key_allocsp_default(__FILE__, __LINE__) 241 242 /* 243 * For OUTBOUND packet having a socket. Searching SPD for packet, 244 * and return a pointer to SP. 245 * OUT: NULL: no apropreate SP found, the following value is set to error. 246 * 0 : bypass 247 * EACCES : discard packet. 248 * ENOENT : ipsec_acquire() in progress, maybe. 249 * others : error occured. 250 * others: a pointer to SP 251 * 252 * NOTE: IPv6 mapped adddress concern is implemented here. 253 */ 254 struct secpolicy * 255 ipsec_getpolicy(struct tdb_ident *tdbi, u_int dir) 256 { 257 struct secpolicy *sp; 258 259 IPSEC_ASSERT(tdbi != NULL, ("ipsec_getpolicy: null tdbi")); 260 IPSEC_ASSERT(dir == IPSEC_DIR_INBOUND || dir == IPSEC_DIR_OUTBOUND, 261 ("ipsec_getpolicy: invalid direction %u", dir)); 262 263 sp = KEY_ALLOCSP2(tdbi->spi, &tdbi->dst, tdbi->proto, dir); 264 if (sp == NULL) /*XXX????*/ 265 sp = KEY_ALLOCSP_DEFAULT(); 266 IPSEC_ASSERT(sp != NULL, ("ipsec_getpolicy: null SP")); 267 return sp; 268 } 269 270 /* 271 * For OUTBOUND packet having a socket. Searching SPD for packet, 272 * and return a pointer to SP. 273 * OUT: NULL: no apropreate SP found, the following value is set to error. 274 * 0 : bypass 275 * EACCES : discard packet. 276 * ENOENT : ipsec_acquire() in progress, maybe. 277 * others : error occured. 278 * others: a pointer to SP 279 * 280 * NOTE: IPv6 mapped adddress concern is implemented here. 281 */ 282 struct secpolicy * 283 ipsec_getpolicybysock(m, dir, inp, error) 284 struct mbuf *m; 285 u_int dir; 286 struct inpcb *inp; 287 int *error; 288 { 289 struct inpcbpolicy *pcbsp = NULL; 290 struct secpolicy *currsp = NULL; /* policy on socket */ 291 struct secpolicy *sp; 292 int af; 293 294 IPSEC_ASSERT(m != NULL, ("ipsec_getpolicybysock: null mbuf")); 295 IPSEC_ASSERT(inp != NULL, ("ipsec_getpolicybysock: null inpcb")); 296 IPSEC_ASSERT(error != NULL, ("ipsec_getpolicybysock: null error")); 297 IPSEC_ASSERT(dir == IPSEC_DIR_INBOUND || dir == IPSEC_DIR_OUTBOUND, 298 ("ipsec_getpolicybysock: invalid direction %u", dir)); 299 300 af = inp->inp_socket->so_proto->pr_domain->dom_family; 301 IPSEC_ASSERT(af == AF_INET || af == AF_INET6, 302 ("ipsec_getpolicybysock: unexpected protocol family %u", af)); 303 304 switch (af) { 305 case AF_INET: 306 /* set spidx in pcb */ 307 *error = ipsec4_setspidx_inpcb(m, inp); 308 pcbsp = inp->inp_sp; 309 break; 310 #ifdef INET6 311 case AF_INET6: 312 /* set spidx in pcb */ 313 *error = ipsec6_setspidx_in6pcb(m, inp); 314 pcbsp = inp->in6p_sp; 315 break; 316 #endif 317 default: 318 *error = EPFNOSUPPORT; 319 break; 320 } 321 if (*error) 322 return NULL; 323 324 IPSEC_ASSERT(pcbsp != NULL, ("ipsec_getpolicybysock: null pcbsp")); 325 switch (dir) { 326 case IPSEC_DIR_INBOUND: 327 currsp = pcbsp->sp_in; 328 break; 329 case IPSEC_DIR_OUTBOUND: 330 currsp = pcbsp->sp_out; 331 break; 332 } 333 IPSEC_ASSERT(currsp != NULL, ("ipsec_getpolicybysock: null currsp")); 334 335 if (pcbsp->priv) { /* when privilieged socket */ 336 switch (currsp->policy) { 337 case IPSEC_POLICY_BYPASS: 338 case IPSEC_POLICY_IPSEC: 339 currsp->refcnt++; 340 sp = currsp; 341 break; 342 343 case IPSEC_POLICY_ENTRUST: 344 /* look for a policy in SPD */ 345 sp = KEY_ALLOCSP(&currsp->spidx, dir); 346 if (sp == NULL) /* no SP found */ 347 sp = KEY_ALLOCSP_DEFAULT(); 348 break; 349 350 default: 351 ipseclog((LOG_ERR, "ipsec_getpolicybysock: " 352 "Invalid policy for PCB %d\n", currsp->policy)); 353 *error = EINVAL; 354 return NULL; 355 } 356 } else { /* unpriv, SPD has policy */ 357 sp = KEY_ALLOCSP(&currsp->spidx, dir); 358 if (sp == NULL) { /* no SP found */ 359 switch (currsp->policy) { 360 case IPSEC_POLICY_BYPASS: 361 ipseclog((LOG_ERR, "ipsec_getpolicybysock: " 362 "Illegal policy for non-priviliged defined %d\n", 363 currsp->policy)); 364 *error = EINVAL; 365 return NULL; 366 367 case IPSEC_POLICY_ENTRUST: 368 sp = KEY_ALLOCSP_DEFAULT(); 369 break; 370 371 case IPSEC_POLICY_IPSEC: 372 currsp->refcnt++; 373 sp = currsp; 374 break; 375 376 default: 377 ipseclog((LOG_ERR, "ipsec_getpolicybysock: " 378 "Invalid policy for PCB %d\n", currsp->policy)); 379 *error = EINVAL; 380 return NULL; 381 } 382 } 383 } 384 IPSEC_ASSERT(sp != NULL, 385 ("ipsec_getpolicybysock: null SP (priv %u policy %u", 386 pcbsp->priv, currsp->policy)); 387 KEYDEBUG(KEYDEBUG_IPSEC_STAMP, 388 printf("DP ipsec_getpolicybysock (priv %u policy %u) allocates " 389 "SP:%p (refcnt %u)\n", pcbsp->priv, currsp->policy, 390 sp, sp->refcnt)); 391 return sp; 392 } 393 394 /* 395 * For FORWADING packet or OUTBOUND without a socket. Searching SPD for packet, 396 * and return a pointer to SP. 397 * OUT: positive: a pointer to the entry for security policy leaf matched. 398 * NULL: no apropreate SP found, the following value is set to error. 399 * 0 : bypass 400 * EACCES : discard packet. 401 * ENOENT : ipsec_acquire() in progress, maybe. 402 * others : error occured. 403 */ 404 struct secpolicy * 405 ipsec_getpolicybyaddr(m, dir, flag, error) 406 struct mbuf *m; 407 u_int dir; 408 int flag; 409 int *error; 410 { 411 struct secpolicyindex spidx; 412 struct secpolicy *sp; 413 414 IPSEC_ASSERT(m != NULL, ("ipsec_getpolicybyaddr: null mbuf")); 415 IPSEC_ASSERT(error != NULL, ("ipsec_getpolicybyaddr: null error")); 416 IPSEC_ASSERT(dir == IPSEC_DIR_INBOUND || dir == IPSEC_DIR_OUTBOUND, 417 ("ipsec4_getpolicybaddr: invalid direction %u", dir)); 418 419 sp = NULL; 420 if (key_havesp(dir)) { 421 /* Make an index to look for a policy. */ 422 *error = ipsec_setspidx(m, &spidx, 423 (flag & IP_FORWARDING) ? 0 : 1); 424 if (*error != 0) { 425 DPRINTF(("ipsec_getpolicybyaddr: setpidx failed," 426 " dir %u flag %u\n", dir, flag)); 427 bzero(&spidx, sizeof (spidx)); 428 return NULL; 429 } 430 spidx.dir = dir; 431 432 sp = KEY_ALLOCSP(&spidx, dir); 433 } 434 if (sp == NULL) /* no SP found, use system default */ 435 sp = KEY_ALLOCSP_DEFAULT(); 436 IPSEC_ASSERT(sp != NULL, ("ipsec_getpolicybyaddr: null SP")); 437 return sp; 438 } 439 440 struct secpolicy * 441 ipsec4_checkpolicy(m, dir, flag, error, inp) 442 struct mbuf *m; 443 u_int dir, flag; 444 int *error; 445 struct inpcb *inp; 446 { 447 struct secpolicy *sp; 448 449 *error = 0; 450 if (inp == NULL) 451 sp = ipsec_getpolicybyaddr(m, dir, flag, error); 452 else 453 sp = ipsec_getpolicybysock(m, dir, inp, error); 454 if (sp == NULL) { 455 IPSEC_ASSERT(*error != 0, 456 ("ipsec4_checkpolicy: getpolicy failed w/o error")); 457 newipsecstat.ips_out_inval++; 458 return NULL; 459 } 460 IPSEC_ASSERT(*error == 0, 461 ("ipsec4_checkpolicy: sp w/ error set to %u", *error)); 462 switch (sp->policy) { 463 case IPSEC_POLICY_ENTRUST: 464 default: 465 printf("ipsec4_checkpolicy: invalid policy %u\n", sp->policy); 466 /* fall thru... */ 467 case IPSEC_POLICY_DISCARD: 468 newipsecstat.ips_out_polvio++; 469 *error = -EINVAL; /* packet is discarded by caller */ 470 break; 471 case IPSEC_POLICY_BYPASS: 472 case IPSEC_POLICY_NONE: 473 KEY_FREESP(&sp); 474 sp = NULL; /* NB: force NULL result */ 475 break; 476 case IPSEC_POLICY_IPSEC: 477 if (sp->req == NULL) /* acquire an SA */ 478 *error = key_spdacquire(sp); 479 break; 480 } 481 if (*error != 0) { 482 KEY_FREESP(&sp); 483 sp = NULL; 484 } 485 return sp; 486 } 487 488 static int 489 ipsec4_setspidx_inpcb(m, pcb) 490 struct mbuf *m; 491 struct inpcb *pcb; 492 { 493 int error; 494 495 IPSEC_ASSERT(pcb != NULL, ("ipsec4_setspidx_inpcb: null pcb")); 496 IPSEC_ASSERT(pcb->inp_sp != NULL, ("ipsec4_setspidx_inpcb: null inp_sp")); 497 IPSEC_ASSERT(pcb->inp_sp->sp_out != NULL && pcb->inp_sp->sp_in != NULL, 498 ("ipsec4_setspidx_inpcb: null sp_in || sp_out")); 499 500 error = ipsec_setspidx(m, &pcb->inp_sp->sp_in->spidx, 1); 501 if (error == 0) { 502 pcb->inp_sp->sp_in->spidx.dir = IPSEC_DIR_INBOUND; 503 pcb->inp_sp->sp_out->spidx = pcb->inp_sp->sp_in->spidx; 504 pcb->inp_sp->sp_out->spidx.dir = IPSEC_DIR_OUTBOUND; 505 } else { 506 bzero(&pcb->inp_sp->sp_in->spidx, 507 sizeof (pcb->inp_sp->sp_in->spidx)); 508 bzero(&pcb->inp_sp->sp_out->spidx, 509 sizeof (pcb->inp_sp->sp_in->spidx)); 510 } 511 return error; 512 } 513 514 #ifdef INET6 515 static int 516 ipsec6_setspidx_in6pcb(m, pcb) 517 struct mbuf *m; 518 struct in6pcb *pcb; 519 { 520 struct secpolicyindex *spidx; 521 int error; 522 523 IPSEC_ASSERT(pcb != NULL, ("ipsec6_setspidx_in6pcb: null pcb")); 524 IPSEC_ASSERT(pcb->in6p_sp != NULL, ("ipsec6_setspidx_in6pcb: null inp_sp")); 525 IPSEC_ASSERT(pcb->in6p_sp->sp_out != NULL && pcb->in6p_sp->sp_in != NULL, 526 ("ipsec6_setspidx_in6pcb: null sp_in || sp_out")); 527 528 bzero(&pcb->in6p_sp->sp_in->spidx, sizeof(*spidx)); 529 bzero(&pcb->in6p_sp->sp_out->spidx, sizeof(*spidx)); 530 531 spidx = &pcb->in6p_sp->sp_in->spidx; 532 error = ipsec_setspidx(m, spidx, 1); 533 if (error) 534 goto bad; 535 spidx->dir = IPSEC_DIR_INBOUND; 536 537 spidx = &pcb->in6p_sp->sp_out->spidx; 538 error = ipsec_setspidx(m, spidx, 1); 539 if (error) 540 goto bad; 541 spidx->dir = IPSEC_DIR_OUTBOUND; 542 543 return 0; 544 545 bad: 546 bzero(&pcb->in6p_sp->sp_in->spidx, sizeof(*spidx)); 547 bzero(&pcb->in6p_sp->sp_out->spidx, sizeof(*spidx)); 548 return error; 549 } 550 #endif 551 552 /* 553 * configure security policy index (src/dst/proto/sport/dport) 554 * by looking at the content of mbuf. 555 * the caller is responsible for error recovery (like clearing up spidx). 556 */ 557 static int 558 ipsec_setspidx(m, spidx, needport) 559 struct mbuf *m; 560 struct secpolicyindex *spidx; 561 int needport; 562 { 563 struct ip *ip = NULL; 564 struct ip ipbuf; 565 u_int v; 566 struct mbuf *n; 567 int len; 568 int error; 569 570 IPSEC_ASSERT(m != NULL, ("ipsec_setspidx: null mbuf")); 571 572 /* 573 * validate m->m_pkthdr.len. we see incorrect length if we 574 * mistakenly call this function with inconsistent mbuf chain 575 * (like 4.4BSD tcp/udp processing). XXX should we panic here? 576 */ 577 len = 0; 578 for (n = m; n; n = n->m_next) 579 len += n->m_len; 580 if (m->m_pkthdr.len != len) { 581 KEYDEBUG(KEYDEBUG_IPSEC_DUMP, 582 printf("ipsec_setspidx: " 583 "total of m_len(%d) != pkthdr.len(%d), " 584 "ignored.\n", 585 len, m->m_pkthdr.len)); 586 return EINVAL; 587 } 588 589 if (m->m_pkthdr.len < sizeof(struct ip)) { 590 KEYDEBUG(KEYDEBUG_IPSEC_DUMP, 591 printf("ipsec_setspidx: " 592 "pkthdr.len(%d) < sizeof(struct ip), ignored.\n", 593 m->m_pkthdr.len)); 594 return EINVAL; 595 } 596 597 if (m->m_len >= sizeof(*ip)) 598 ip = mtod(m, struct ip *); 599 else { 600 m_copydata(m, 0, sizeof(ipbuf), (caddr_t)&ipbuf); 601 ip = &ipbuf; 602 } 603 #ifdef _IP_VHL 604 v = _IP_VHL_V(ip->ip_vhl); 605 #else 606 v = ip->ip_v; 607 #endif 608 switch (v) { 609 case 4: 610 error = ipsec4_setspidx_ipaddr(m, spidx); 611 if (error) 612 return error; 613 ipsec4_get_ulp(m, spidx, needport); 614 return 0; 615 #ifdef INET6 616 case 6: 617 if (m->m_pkthdr.len < sizeof(struct ip6_hdr)) { 618 KEYDEBUG(KEYDEBUG_IPSEC_DUMP, 619 printf("ipsec_setspidx: " 620 "pkthdr.len(%d) < sizeof(struct ip6_hdr), " 621 "ignored.\n", m->m_pkthdr.len)); 622 return EINVAL; 623 } 624 error = ipsec6_setspidx_ipaddr(m, spidx); 625 if (error) 626 return error; 627 ipsec6_get_ulp(m, spidx, needport); 628 return 0; 629 #endif 630 default: 631 KEYDEBUG(KEYDEBUG_IPSEC_DUMP, 632 printf("ipsec_setspidx: " 633 "unknown IP version %u, ignored.\n", v)); 634 return EINVAL; 635 } 636 } 637 638 static void 639 ipsec4_get_ulp(struct mbuf *m, struct secpolicyindex *spidx, int needport) 640 { 641 u_int8_t nxt; 642 int off; 643 644 /* sanity check */ 645 IPSEC_ASSERT(m != NULL, ("ipsec4_get_ulp: null mbuf")); 646 IPSEC_ASSERT(m->m_pkthdr.len >= sizeof(struct ip), 647 ("ipsec4_get_ulp: packet too short")); 648 649 /* NB: ip_input() flips it into host endian XXX need more checking */ 650 if (m->m_len < sizeof (struct ip)) { 651 struct ip *ip = mtod(m, struct ip *); 652 if (ip->ip_off & (IP_MF | IP_OFFMASK)) 653 goto done; 654 #ifdef _IP_VHL 655 off = _IP_VHL_HL(ip->ip_vhl) << 2; 656 #else 657 off = ip->ip_hl << 2; 658 #endif 659 nxt = ip->ip_p; 660 } else { 661 struct ip ih; 662 663 m_copydata(m, 0, sizeof (struct ip), (caddr_t) &ih); 664 if (ih.ip_off & (IP_MF | IP_OFFMASK)) 665 goto done; 666 #ifdef _IP_VHL 667 off = _IP_VHL_HL(ih.ip_vhl) << 2; 668 #else 669 off = ih.ip_hl << 2; 670 #endif 671 nxt = ih.ip_p; 672 } 673 674 while (off < m->m_pkthdr.len) { 675 struct ip6_ext ip6e; 676 struct tcphdr th; 677 struct udphdr uh; 678 679 switch (nxt) { 680 case IPPROTO_TCP: 681 spidx->ul_proto = nxt; 682 if (!needport) 683 goto done_proto; 684 if (off + sizeof(struct tcphdr) > m->m_pkthdr.len) 685 goto done; 686 m_copydata(m, off, sizeof (th), (caddr_t) &th); 687 spidx->src.sin.sin_port = th.th_sport; 688 spidx->dst.sin.sin_port = th.th_dport; 689 return; 690 case IPPROTO_UDP: 691 spidx->ul_proto = nxt; 692 if (!needport) 693 goto done_proto; 694 if (off + sizeof(struct udphdr) > m->m_pkthdr.len) 695 goto done; 696 m_copydata(m, off, sizeof (uh), (caddr_t) &uh); 697 spidx->src.sin.sin_port = uh.uh_sport; 698 spidx->dst.sin.sin_port = uh.uh_dport; 699 return; 700 case IPPROTO_AH: 701 if (m->m_pkthdr.len > off + sizeof(ip6e)) 702 goto done; 703 /* XXX sigh, this works but is totally bogus */ 704 m_copydata(m, off, sizeof(ip6e), (caddr_t) &ip6e); 705 off += (ip6e.ip6e_len + 2) << 2; 706 nxt = ip6e.ip6e_nxt; 707 break; 708 case IPPROTO_ICMP: 709 default: 710 /* XXX intermediate headers??? */ 711 spidx->ul_proto = nxt; 712 goto done_proto; 713 } 714 } 715 done: 716 spidx->ul_proto = IPSEC_ULPROTO_ANY; 717 done_proto: 718 spidx->src.sin.sin_port = IPSEC_PORT_ANY; 719 spidx->dst.sin.sin_port = IPSEC_PORT_ANY; 720 } 721 722 /* assumes that m is sane */ 723 static int 724 ipsec4_setspidx_ipaddr(struct mbuf *m, struct secpolicyindex *spidx) 725 { 726 static const struct sockaddr_in template = { 727 sizeof (struct sockaddr_in), 728 AF_INET, 729 0, { 0 }, { 0, 0, 0, 0, 0, 0, 0, 0 } 730 }; 731 732 spidx->src.sin = template; 733 spidx->dst.sin = template; 734 735 if (m->m_len < sizeof (struct ip)) { 736 m_copydata(m, offsetof(struct ip, ip_src), 737 sizeof (struct in_addr), 738 (caddr_t) &spidx->src.sin.sin_addr); 739 m_copydata(m, offsetof(struct ip, ip_dst), 740 sizeof (struct in_addr), 741 (caddr_t) &spidx->dst.sin.sin_addr); 742 } else { 743 struct ip *ip = mtod(m, struct ip *); 744 spidx->src.sin.sin_addr = ip->ip_src; 745 spidx->dst.sin.sin_addr = ip->ip_dst; 746 } 747 748 spidx->prefs = sizeof(struct in_addr) << 3; 749 spidx->prefd = sizeof(struct in_addr) << 3; 750 751 return 0; 752 } 753 754 #ifdef INET6 755 static void 756 ipsec6_get_ulp(m, spidx, needport) 757 struct mbuf *m; 758 struct secpolicyindex *spidx; 759 int needport; 760 { 761 int off, nxt; 762 struct tcphdr th; 763 struct udphdr uh; 764 765 /* sanity check */ 766 if (m == NULL) 767 panic("ipsec6_get_ulp: NULL pointer was passed.\n"); 768 769 KEYDEBUG(KEYDEBUG_IPSEC_DUMP, 770 printf("ipsec6_get_ulp:\n"); kdebug_mbuf(m)); 771 772 /* set default */ 773 spidx->ul_proto = IPSEC_ULPROTO_ANY; 774 ((struct sockaddr_in6 *)&spidx->src)->sin6_port = IPSEC_PORT_ANY; 775 ((struct sockaddr_in6 *)&spidx->dst)->sin6_port = IPSEC_PORT_ANY; 776 777 nxt = -1; 778 off = ip6_lasthdr(m, 0, IPPROTO_IPV6, &nxt); 779 if (off < 0 || m->m_pkthdr.len < off) 780 return; 781 782 switch (nxt) { 783 case IPPROTO_TCP: 784 spidx->ul_proto = nxt; 785 if (!needport) 786 break; 787 if (off + sizeof(struct tcphdr) > m->m_pkthdr.len) 788 break; 789 m_copydata(m, off, sizeof(th), (caddr_t)&th); 790 ((struct sockaddr_in6 *)&spidx->src)->sin6_port = th.th_sport; 791 ((struct sockaddr_in6 *)&spidx->dst)->sin6_port = th.th_dport; 792 break; 793 case IPPROTO_UDP: 794 spidx->ul_proto = nxt; 795 if (!needport) 796 break; 797 if (off + sizeof(struct udphdr) > m->m_pkthdr.len) 798 break; 799 m_copydata(m, off, sizeof(uh), (caddr_t)&uh); 800 ((struct sockaddr_in6 *)&spidx->src)->sin6_port = uh.uh_sport; 801 ((struct sockaddr_in6 *)&spidx->dst)->sin6_port = uh.uh_dport; 802 break; 803 case IPPROTO_ICMPV6: 804 default: 805 /* XXX intermediate headers??? */ 806 spidx->ul_proto = nxt; 807 break; 808 } 809 } 810 811 /* assumes that m is sane */ 812 static int 813 ipsec6_setspidx_ipaddr(m, spidx) 814 struct mbuf *m; 815 struct secpolicyindex *spidx; 816 { 817 struct ip6_hdr *ip6 = NULL; 818 struct ip6_hdr ip6buf; 819 struct sockaddr_in6 *sin6; 820 821 if (m->m_len >= sizeof(*ip6)) 822 ip6 = mtod(m, struct ip6_hdr *); 823 else { 824 m_copydata(m, 0, sizeof(ip6buf), (caddr_t)&ip6buf); 825 ip6 = &ip6buf; 826 } 827 828 sin6 = (struct sockaddr_in6 *)&spidx->src; 829 bzero(sin6, sizeof(*sin6)); 830 sin6->sin6_family = AF_INET6; 831 sin6->sin6_len = sizeof(struct sockaddr_in6); 832 bcopy(&ip6->ip6_src, &sin6->sin6_addr, sizeof(ip6->ip6_src)); 833 if (IN6_IS_SCOPE_LINKLOCAL(&ip6->ip6_src)) { 834 sin6->sin6_addr.s6_addr16[1] = 0; 835 sin6->sin6_scope_id = ntohs(ip6->ip6_src.s6_addr16[1]); 836 } 837 spidx->prefs = sizeof(struct in6_addr) << 3; 838 839 sin6 = (struct sockaddr_in6 *)&spidx->dst; 840 bzero(sin6, sizeof(*sin6)); 841 sin6->sin6_family = AF_INET6; 842 sin6->sin6_len = sizeof(struct sockaddr_in6); 843 bcopy(&ip6->ip6_dst, &sin6->sin6_addr, sizeof(ip6->ip6_dst)); 844 if (IN6_IS_SCOPE_LINKLOCAL(&ip6->ip6_dst)) { 845 sin6->sin6_addr.s6_addr16[1] = 0; 846 sin6->sin6_scope_id = ntohs(ip6->ip6_dst.s6_addr16[1]); 847 } 848 spidx->prefd = sizeof(struct in6_addr) << 3; 849 850 return 0; 851 } 852 #endif 853 854 static void 855 ipsec_delpcbpolicy(p) 856 struct inpcbpolicy *p; 857 { 858 free(p, M_SECA); 859 } 860 861 /* initialize policy in PCB */ 862 int 863 ipsec_init_policy(so, pcb_sp) 864 struct socket *so; 865 struct inpcbpolicy **pcb_sp; 866 { 867 struct inpcbpolicy *new; 868 869 /* sanity check. */ 870 if (so == NULL || pcb_sp == NULL) 871 panic("ipsec_init_policy: NULL pointer was passed.\n"); 872 873 new = (struct inpcbpolicy *) malloc(sizeof(struct inpcbpolicy), 874 M_SECA, M_NOWAIT|M_ZERO); 875 if (new == NULL) { 876 ipseclog((LOG_DEBUG, "ipsec_init_policy: No more memory.\n")); 877 return ENOBUFS; 878 } 879 880 if (IPSEC_PRIVILEGED_SO(so)) 881 new->priv = 1; 882 else 883 new->priv = 0; 884 885 if ((new->sp_in = KEY_NEWSP()) == NULL) { 886 ipsec_delpcbpolicy(new); 887 return ENOBUFS; 888 } 889 new->sp_in->state = IPSEC_SPSTATE_ALIVE; 890 new->sp_in->policy = IPSEC_POLICY_ENTRUST; 891 892 if ((new->sp_out = KEY_NEWSP()) == NULL) { 893 KEY_FREESP(&new->sp_in); 894 ipsec_delpcbpolicy(new); 895 return ENOBUFS; 896 } 897 new->sp_out->state = IPSEC_SPSTATE_ALIVE; 898 new->sp_out->policy = IPSEC_POLICY_ENTRUST; 899 900 *pcb_sp = new; 901 902 return 0; 903 } 904 905 /* copy old ipsec policy into new */ 906 int 907 ipsec_copy_policy(old, new) 908 struct inpcbpolicy *old, *new; 909 { 910 struct secpolicy *sp; 911 912 sp = ipsec_deepcopy_policy(old->sp_in); 913 if (sp) { 914 KEY_FREESP(&new->sp_in); 915 new->sp_in = sp; 916 } else 917 return ENOBUFS; 918 919 sp = ipsec_deepcopy_policy(old->sp_out); 920 if (sp) { 921 KEY_FREESP(&new->sp_out); 922 new->sp_out = sp; 923 } else 924 return ENOBUFS; 925 926 new->priv = old->priv; 927 928 return 0; 929 } 930 931 /* deep-copy a policy in PCB */ 932 static struct secpolicy * 933 ipsec_deepcopy_policy(src) 934 struct secpolicy *src; 935 { 936 struct ipsecrequest *newchain = NULL; 937 struct ipsecrequest *p; 938 struct ipsecrequest **q; 939 struct ipsecrequest *r; 940 struct secpolicy *dst; 941 942 if (src == NULL) 943 return NULL; 944 dst = KEY_NEWSP(); 945 if (dst == NULL) 946 return NULL; 947 948 /* 949 * deep-copy IPsec request chain. This is required since struct 950 * ipsecrequest is not reference counted. 951 */ 952 q = &newchain; 953 for (p = src->req; p; p = p->next) { 954 *q = (struct ipsecrequest *)malloc(sizeof(struct ipsecrequest), 955 M_SECA, M_NOWAIT); 956 if (*q == NULL) 957 goto fail; 958 bzero(*q, sizeof(**q)); 959 (*q)->next = NULL; 960 961 (*q)->saidx.proto = p->saidx.proto; 962 (*q)->saidx.mode = p->saidx.mode; 963 (*q)->level = p->level; 964 (*q)->saidx.reqid = p->saidx.reqid; 965 966 bcopy(&p->saidx.src, &(*q)->saidx.src, sizeof((*q)->saidx.src)); 967 bcopy(&p->saidx.dst, &(*q)->saidx.dst, sizeof((*q)->saidx.dst)); 968 969 (*q)->sav = NULL; 970 (*q)->sp = dst; 971 972 q = &((*q)->next); 973 } 974 975 dst->req = newchain; 976 dst->state = src->state; 977 dst->policy = src->policy; 978 /* do not touch the refcnt fields */ 979 980 return dst; 981 982 fail: 983 for (p = newchain; p; p = r) { 984 r = p->next; 985 free(p, M_SECA); 986 p = NULL; 987 } 988 return NULL; 989 } 990 991 /* set policy and ipsec request if present. */ 992 static int 993 ipsec_set_policy(pcb_sp, optname, request, len, priv) 994 struct secpolicy **pcb_sp; 995 int optname; 996 caddr_t request; 997 size_t len; 998 int priv; 999 { 1000 struct sadb_x_policy *xpl; 1001 struct secpolicy *newsp = NULL; 1002 int error; 1003 1004 /* sanity check. */ 1005 if (pcb_sp == NULL || *pcb_sp == NULL || request == NULL) 1006 return EINVAL; 1007 if (len < sizeof(*xpl)) 1008 return EINVAL; 1009 xpl = (struct sadb_x_policy *)request; 1010 1011 KEYDEBUG(KEYDEBUG_IPSEC_DUMP, 1012 printf("ipsec_set_policy: passed policy\n"); 1013 kdebug_sadb_x_policy((struct sadb_ext *)xpl)); 1014 1015 /* check policy type */ 1016 /* ipsec_set_policy() accepts IPSEC, ENTRUST and BYPASS. */ 1017 if (xpl->sadb_x_policy_type == IPSEC_POLICY_DISCARD 1018 || xpl->sadb_x_policy_type == IPSEC_POLICY_NONE) 1019 return EINVAL; 1020 1021 /* check privileged socket */ 1022 if (priv == 0 && xpl->sadb_x_policy_type == IPSEC_POLICY_BYPASS) 1023 return EACCES; 1024 1025 /* allocation new SP entry */ 1026 if ((newsp = key_msg2sp(xpl, len, &error)) == NULL) 1027 return error; 1028 1029 newsp->state = IPSEC_SPSTATE_ALIVE; 1030 1031 /* clear old SP and set new SP */ 1032 KEY_FREESP(pcb_sp); 1033 *pcb_sp = newsp; 1034 KEYDEBUG(KEYDEBUG_IPSEC_DUMP, 1035 printf("ipsec_set_policy: new policy\n"); 1036 kdebug_secpolicy(newsp)); 1037 1038 return 0; 1039 } 1040 1041 static int 1042 ipsec_get_policy(pcb_sp, mp) 1043 struct secpolicy *pcb_sp; 1044 struct mbuf **mp; 1045 { 1046 1047 /* sanity check. */ 1048 if (pcb_sp == NULL || mp == NULL) 1049 return EINVAL; 1050 1051 *mp = key_sp2msg(pcb_sp); 1052 if (!*mp) { 1053 ipseclog((LOG_DEBUG, "ipsec_get_policy: No more memory.\n")); 1054 return ENOBUFS; 1055 } 1056 1057 (*mp)->m_type = MT_DATA; 1058 KEYDEBUG(KEYDEBUG_IPSEC_DUMP, 1059 printf("ipsec_get_policy:\n"); 1060 kdebug_mbuf(*mp)); 1061 1062 return 0; 1063 } 1064 1065 int 1066 ipsec4_set_policy(inp, optname, request, len, priv) 1067 struct inpcb *inp; 1068 int optname; 1069 caddr_t request; 1070 size_t len; 1071 int priv; 1072 { 1073 struct sadb_x_policy *xpl; 1074 struct secpolicy **pcb_sp; 1075 1076 /* sanity check. */ 1077 if (inp == NULL || request == NULL) 1078 return EINVAL; 1079 if (len < sizeof(*xpl)) 1080 return EINVAL; 1081 xpl = (struct sadb_x_policy *)request; 1082 1083 IPSEC_ASSERT(inp->inp_sp != NULL, 1084 ("ipsec4_set_policy(): null inp->in_sp")); 1085 1086 /* select direction */ 1087 switch (xpl->sadb_x_policy_dir) { 1088 case IPSEC_DIR_INBOUND: 1089 pcb_sp = &inp->inp_sp->sp_in; 1090 break; 1091 case IPSEC_DIR_OUTBOUND: 1092 pcb_sp = &inp->inp_sp->sp_out; 1093 break; 1094 default: 1095 ipseclog((LOG_ERR, "ipsec4_set_policy: invalid direction=%u\n", 1096 xpl->sadb_x_policy_dir)); 1097 return EINVAL; 1098 } 1099 1100 return ipsec_set_policy(pcb_sp, optname, request, len, priv); 1101 } 1102 1103 int 1104 ipsec4_get_policy(inp, request, len, mp) 1105 struct inpcb *inp; 1106 caddr_t request; 1107 size_t len; 1108 struct mbuf **mp; 1109 { 1110 struct sadb_x_policy *xpl; 1111 struct secpolicy *pcb_sp; 1112 1113 /* sanity check. */ 1114 if (inp == NULL || request == NULL || mp == NULL) 1115 return EINVAL; 1116 IPSEC_ASSERT(inp->inp_sp != NULL, ("ipsec4_get_policy: null inp_sp")); 1117 if (len < sizeof(*xpl)) 1118 return EINVAL; 1119 xpl = (struct sadb_x_policy *)request; 1120 1121 /* select direction */ 1122 switch (xpl->sadb_x_policy_dir) { 1123 case IPSEC_DIR_INBOUND: 1124 pcb_sp = inp->inp_sp->sp_in; 1125 break; 1126 case IPSEC_DIR_OUTBOUND: 1127 pcb_sp = inp->inp_sp->sp_out; 1128 break; 1129 default: 1130 ipseclog((LOG_ERR, "ipsec4_set_policy: invalid direction=%u\n", 1131 xpl->sadb_x_policy_dir)); 1132 return EINVAL; 1133 } 1134 1135 return ipsec_get_policy(pcb_sp, mp); 1136 } 1137 1138 /* delete policy in PCB */ 1139 int 1140 ipsec4_delete_pcbpolicy(inp) 1141 struct inpcb *inp; 1142 { 1143 IPSEC_ASSERT(inp != NULL, ("ipsec4_delete_pcbpolicy: null inp")); 1144 1145 if (inp->inp_sp == NULL) 1146 return 0; 1147 1148 if (inp->inp_sp->sp_in != NULL) 1149 KEY_FREESP(&inp->inp_sp->sp_in); 1150 1151 if (inp->inp_sp->sp_out != NULL) 1152 KEY_FREESP(&inp->inp_sp->sp_out); 1153 1154 ipsec_delpcbpolicy(inp->inp_sp); 1155 inp->inp_sp = NULL; 1156 1157 return 0; 1158 } 1159 1160 #ifdef INET6 1161 int 1162 ipsec6_set_policy(in6p, optname, request, len, priv) 1163 struct in6pcb *in6p; 1164 int optname; 1165 caddr_t request; 1166 size_t len; 1167 int priv; 1168 { 1169 struct sadb_x_policy *xpl; 1170 struct secpolicy **pcb_sp; 1171 1172 /* sanity check. */ 1173 if (in6p == NULL || request == NULL) 1174 return EINVAL; 1175 if (len < sizeof(*xpl)) 1176 return EINVAL; 1177 xpl = (struct sadb_x_policy *)request; 1178 1179 /* select direction */ 1180 switch (xpl->sadb_x_policy_dir) { 1181 case IPSEC_DIR_INBOUND: 1182 pcb_sp = &in6p->in6p_sp->sp_in; 1183 break; 1184 case IPSEC_DIR_OUTBOUND: 1185 pcb_sp = &in6p->in6p_sp->sp_out; 1186 break; 1187 default: 1188 ipseclog((LOG_ERR, "ipsec6_set_policy: invalid direction=%u\n", 1189 xpl->sadb_x_policy_dir)); 1190 return EINVAL; 1191 } 1192 1193 return ipsec_set_policy(pcb_sp, optname, request, len, priv); 1194 } 1195 1196 int 1197 ipsec6_get_policy(in6p, request, len, mp) 1198 struct in6pcb *in6p; 1199 caddr_t request; 1200 size_t len; 1201 struct mbuf **mp; 1202 { 1203 struct sadb_x_policy *xpl; 1204 struct secpolicy *pcb_sp; 1205 1206 /* sanity check. */ 1207 if (in6p == NULL || request == NULL || mp == NULL) 1208 return EINVAL; 1209 IPSEC_ASSERT(in6p->in6p_sp != NULL, ("ipsec6_get_policy: null in6p_sp")); 1210 if (len < sizeof(*xpl)) 1211 return EINVAL; 1212 xpl = (struct sadb_x_policy *)request; 1213 1214 /* select direction */ 1215 switch (xpl->sadb_x_policy_dir) { 1216 case IPSEC_DIR_INBOUND: 1217 pcb_sp = in6p->in6p_sp->sp_in; 1218 break; 1219 case IPSEC_DIR_OUTBOUND: 1220 pcb_sp = in6p->in6p_sp->sp_out; 1221 break; 1222 default: 1223 ipseclog((LOG_ERR, "ipsec6_set_policy: invalid direction=%u\n", 1224 xpl->sadb_x_policy_dir)); 1225 return EINVAL; 1226 } 1227 1228 return ipsec_get_policy(pcb_sp, mp); 1229 } 1230 1231 int 1232 ipsec6_delete_pcbpolicy(in6p) 1233 struct in6pcb *in6p; 1234 { 1235 IPSEC_ASSERT(in6p != NULL, ("ipsec6_delete_pcbpolicy: null in6p")); 1236 1237 if (in6p->in6p_sp == NULL) 1238 return 0; 1239 1240 if (in6p->in6p_sp->sp_in != NULL) 1241 KEY_FREESP(&in6p->in6p_sp->sp_in); 1242 1243 if (in6p->in6p_sp->sp_out != NULL) 1244 KEY_FREESP(&in6p->in6p_sp->sp_out); 1245 1246 ipsec_delpcbpolicy(in6p->in6p_sp); 1247 in6p->in6p_sp = NULL; 1248 1249 return 0; 1250 } 1251 #endif 1252 1253 /* 1254 * return current level. 1255 * Either IPSEC_LEVEL_USE or IPSEC_LEVEL_REQUIRE are always returned. 1256 */ 1257 u_int 1258 ipsec_get_reqlevel(isr) 1259 struct ipsecrequest *isr; 1260 { 1261 u_int level = 0; 1262 u_int esp_trans_deflev, esp_net_deflev; 1263 u_int ah_trans_deflev, ah_net_deflev; 1264 1265 IPSEC_ASSERT(isr != NULL && isr->sp != NULL, 1266 ("ipsec_get_reqlevel: null argument")); 1267 IPSEC_ASSERT(isr->sp->spidx.src.sa.sa_family == isr->sp->spidx.dst.sa.sa_family, 1268 ("ipsec_get_reqlevel: af family mismatch, src %u, dst %u", 1269 isr->sp->spidx.src.sa.sa_family, 1270 isr->sp->spidx.dst.sa.sa_family)); 1271 1272 /* XXX note that we have ipseclog() expanded here - code sync issue */ 1273 #define IPSEC_CHECK_DEFAULT(lev) \ 1274 (((lev) != IPSEC_LEVEL_USE && (lev) != IPSEC_LEVEL_REQUIRE \ 1275 && (lev) != IPSEC_LEVEL_UNIQUE) \ 1276 ? (ipsec_debug \ 1277 ? log(LOG_INFO, "fixed system default level " #lev ":%d->%d\n",\ 1278 (lev), IPSEC_LEVEL_REQUIRE) \ 1279 : 0), \ 1280 (lev) = IPSEC_LEVEL_REQUIRE, \ 1281 (lev) \ 1282 : (lev)) 1283 1284 /* set default level */ 1285 switch (((struct sockaddr *)&isr->sp->spidx.src)->sa_family) { 1286 #ifdef INET 1287 case AF_INET: 1288 esp_trans_deflev = IPSEC_CHECK_DEFAULT(ip4_esp_trans_deflev); 1289 esp_net_deflev = IPSEC_CHECK_DEFAULT(ip4_esp_net_deflev); 1290 ah_trans_deflev = IPSEC_CHECK_DEFAULT(ip4_ah_trans_deflev); 1291 ah_net_deflev = IPSEC_CHECK_DEFAULT(ip4_ah_net_deflev); 1292 break; 1293 #endif 1294 #ifdef INET6 1295 case AF_INET6: 1296 esp_trans_deflev = IPSEC_CHECK_DEFAULT(ip6_esp_trans_deflev); 1297 esp_net_deflev = IPSEC_CHECK_DEFAULT(ip6_esp_net_deflev); 1298 ah_trans_deflev = IPSEC_CHECK_DEFAULT(ip6_ah_trans_deflev); 1299 ah_net_deflev = IPSEC_CHECK_DEFAULT(ip6_ah_net_deflev); 1300 break; 1301 #endif /* INET6 */ 1302 default: 1303 panic("key_get_reqlevel: unknown af %u", 1304 isr->sp->spidx.src.sa.sa_family); 1305 } 1306 1307 #undef IPSEC_CHECK_DEFAULT 1308 1309 /* set level */ 1310 switch (isr->level) { 1311 case IPSEC_LEVEL_DEFAULT: 1312 switch (isr->saidx.proto) { 1313 case IPPROTO_ESP: 1314 if (isr->saidx.mode == IPSEC_MODE_TUNNEL) 1315 level = esp_net_deflev; 1316 else 1317 level = esp_trans_deflev; 1318 break; 1319 case IPPROTO_AH: 1320 if (isr->saidx.mode == IPSEC_MODE_TUNNEL) 1321 level = ah_net_deflev; 1322 else 1323 level = ah_trans_deflev; 1324 case IPPROTO_IPCOMP: 1325 /* 1326 * we don't really care, as IPcomp document says that 1327 * we shouldn't compress small packets 1328 */ 1329 level = IPSEC_LEVEL_USE; 1330 break; 1331 default: 1332 panic("ipsec_get_reqlevel: " 1333 "Illegal protocol defined %u\n", 1334 isr->saidx.proto); 1335 } 1336 break; 1337 1338 case IPSEC_LEVEL_USE: 1339 case IPSEC_LEVEL_REQUIRE: 1340 level = isr->level; 1341 break; 1342 case IPSEC_LEVEL_UNIQUE: 1343 level = IPSEC_LEVEL_REQUIRE; 1344 break; 1345 1346 default: 1347 panic("ipsec_get_reqlevel: Illegal IPsec level %u\n", 1348 isr->level); 1349 } 1350 1351 return level; 1352 } 1353 1354 /* 1355 * Check security policy requirements against the actual 1356 * packet contents. Return one if the packet should be 1357 * reject as "invalid"; otherwiser return zero to have the 1358 * packet treated as "valid". 1359 * 1360 * OUT: 1361 * 0: valid 1362 * 1: invalid 1363 */ 1364 int 1365 ipsec_in_reject(struct secpolicy *sp, struct mbuf *m) 1366 { 1367 struct ipsecrequest *isr; 1368 int need_auth; 1369 1370 KEYDEBUG(KEYDEBUG_IPSEC_DATA, 1371 printf("ipsec_in_reject: using SP\n"); 1372 kdebug_secpolicy(sp)); 1373 1374 /* check policy */ 1375 switch (sp->policy) { 1376 case IPSEC_POLICY_DISCARD: 1377 return 1; 1378 case IPSEC_POLICY_BYPASS: 1379 case IPSEC_POLICY_NONE: 1380 return 0; 1381 } 1382 1383 IPSEC_ASSERT(sp->policy == IPSEC_POLICY_IPSEC, 1384 ("ipsec_in_reject: invalid policy %u", sp->policy)); 1385 1386 /* XXX should compare policy against ipsec header history */ 1387 1388 need_auth = 0; 1389 for (isr = sp->req; isr != NULL; isr = isr->next) { 1390 if (ipsec_get_reqlevel(isr) != IPSEC_LEVEL_REQUIRE) 1391 continue; 1392 switch (isr->saidx.proto) { 1393 case IPPROTO_ESP: 1394 if ((m->m_flags & M_DECRYPTED) == 0) { 1395 KEYDEBUG(KEYDEBUG_IPSEC_DUMP, 1396 printf("ipsec_in_reject: ESP m_flags:%x\n", 1397 m->m_flags)); 1398 return 1; 1399 } 1400 1401 if (!need_auth && 1402 isr->sav != NULL && 1403 isr->sav->tdb_authalgxform != NULL && 1404 (m->m_flags & M_AUTHIPDGM) == 0) { 1405 KEYDEBUG(KEYDEBUG_IPSEC_DUMP, 1406 printf("ipsec_in_reject: ESP/AH m_flags:%x\n", 1407 m->m_flags)); 1408 return 1; 1409 } 1410 break; 1411 case IPPROTO_AH: 1412 need_auth = 1; 1413 if ((m->m_flags & M_AUTHIPHDR) == 0) { 1414 KEYDEBUG(KEYDEBUG_IPSEC_DUMP, 1415 printf("ipsec_in_reject: AH m_flags:%x\n", 1416 m->m_flags)); 1417 return 1; 1418 } 1419 break; 1420 case IPPROTO_IPCOMP: 1421 /* 1422 * we don't really care, as IPcomp document 1423 * says that we shouldn't compress small 1424 * packets, IPComp policy should always be 1425 * treated as being in "use" level. 1426 */ 1427 break; 1428 } 1429 } 1430 return 0; /* valid */ 1431 } 1432 1433 /* 1434 * Check AH/ESP integrity. 1435 * This function is called from tcp_input(), udp_input(), 1436 * and {ah,esp}4_input for tunnel mode 1437 */ 1438 int 1439 ipsec4_in_reject(m, inp) 1440 struct mbuf *m; 1441 struct inpcb *inp; 1442 { 1443 struct secpolicy *sp; 1444 int error; 1445 int result; 1446 1447 IPSEC_ASSERT(m != NULL, ("ipsec4_in_reject_so: null mbuf")); 1448 1449 /* get SP for this packet. 1450 * When we are called from ip_forward(), we call 1451 * ipsec_getpolicybyaddr() with IP_FORWARDING flag. 1452 */ 1453 if (inp == NULL) 1454 sp = ipsec_getpolicybyaddr(m, IPSEC_DIR_INBOUND, IP_FORWARDING, &error); 1455 else 1456 sp = ipsec_getpolicybysock(m, IPSEC_DIR_INBOUND, inp, &error); 1457 1458 if (sp != NULL) { 1459 result = ipsec_in_reject(sp, m); 1460 if (result) 1461 newipsecstat.ips_in_polvio++; 1462 KEY_FREESP(&sp); 1463 } else { 1464 result = 0; /* XXX should be panic ? 1465 * -> No, there may be error. */ 1466 } 1467 return result; 1468 } 1469 1470 1471 #ifdef INET6 1472 /* 1473 * Check AH/ESP integrity. 1474 * This function is called from tcp6_input(), udp6_input(), 1475 * and {ah,esp}6_input for tunnel mode 1476 */ 1477 int 1478 ipsec6_in_reject(m, inp) 1479 struct mbuf *m; 1480 struct inpcb *inp; 1481 { 1482 struct secpolicy *sp = NULL; 1483 int error; 1484 int result; 1485 1486 /* sanity check */ 1487 if (m == NULL) 1488 return 0; /* XXX should be panic ? */ 1489 1490 /* get SP for this packet. 1491 * When we are called from ip_forward(), we call 1492 * ipsec_getpolicybyaddr() with IP_FORWARDING flag. 1493 */ 1494 if (inp == NULL) 1495 sp = ipsec_getpolicybyaddr(m, IPSEC_DIR_INBOUND, IP_FORWARDING, &error); 1496 else 1497 sp = ipsec_getpolicybysock(m, IPSEC_DIR_INBOUND, inp, &error); 1498 1499 if (sp != NULL) { 1500 result = ipsec_in_reject(sp, m); 1501 if (result) 1502 newipsecstat.ips_in_polvio++; 1503 KEY_FREESP(&sp); 1504 } else { 1505 result = 0; 1506 } 1507 return result; 1508 } 1509 #endif 1510 1511 /* 1512 * compute the byte size to be occupied by IPsec header. 1513 * in case it is tunneled, it includes the size of outer IP header. 1514 * NOTE: SP passed is free in this function. 1515 */ 1516 static size_t 1517 ipsec_hdrsiz(struct secpolicy *sp) 1518 { 1519 struct ipsecrequest *isr; 1520 size_t siz; 1521 1522 KEYDEBUG(KEYDEBUG_IPSEC_DATA, 1523 printf("ipsec_hdrsiz: using SP\n"); 1524 kdebug_secpolicy(sp)); 1525 1526 switch (sp->policy) { 1527 case IPSEC_POLICY_DISCARD: 1528 case IPSEC_POLICY_BYPASS: 1529 case IPSEC_POLICY_NONE: 1530 return 0; 1531 } 1532 1533 IPSEC_ASSERT(sp->policy == IPSEC_POLICY_IPSEC, 1534 ("ipsec_hdrsiz: invalid policy %u", sp->policy)); 1535 1536 siz = 0; 1537 for (isr = sp->req; isr != NULL; isr = isr->next) { 1538 size_t clen = 0; 1539 1540 switch (isr->saidx.proto) { 1541 case IPPROTO_ESP: 1542 clen = esp_hdrsiz(isr->sav); 1543 break; 1544 case IPPROTO_AH: 1545 clen = ah_hdrsiz(isr->sav); 1546 break; 1547 case IPPROTO_IPCOMP: 1548 clen = sizeof(struct ipcomp); 1549 break; 1550 } 1551 1552 if (isr->saidx.mode == IPSEC_MODE_TUNNEL) { 1553 switch (isr->saidx.dst.sa.sa_family) { 1554 case AF_INET: 1555 clen += sizeof(struct ip); 1556 break; 1557 #ifdef INET6 1558 case AF_INET6: 1559 clen += sizeof(struct ip6_hdr); 1560 break; 1561 #endif 1562 default: 1563 ipseclog((LOG_ERR, "ipsec_hdrsiz: " 1564 "unknown AF %d in IPsec tunnel SA\n", 1565 ((struct sockaddr *)&isr->saidx.dst)->sa_family)); 1566 break; 1567 } 1568 } 1569 siz += clen; 1570 } 1571 1572 return siz; 1573 } 1574 1575 /* This function is called from ip_forward() and ipsec4_hdrsize_tcp(). */ 1576 size_t 1577 ipsec4_hdrsiz(m, dir, inp) 1578 struct mbuf *m; 1579 u_int dir; 1580 struct inpcb *inp; 1581 { 1582 struct secpolicy *sp; 1583 int error; 1584 size_t size; 1585 1586 IPSEC_ASSERT(m != NULL, ("ipsec4_hdrsiz: null mbuf")); 1587 IPSEC_ASSERT(inp == NULL || inp->inp_socket != NULL, 1588 ("ipsec4_hdrsize: socket w/o inpcb")); 1589 1590 /* get SP for this packet. 1591 * When we are called from ip_forward(), we call 1592 * ipsec_getpolicybyaddr() with IP_FORWARDING flag. 1593 */ 1594 if (inp == NULL) 1595 sp = ipsec_getpolicybyaddr(m, dir, IP_FORWARDING, &error); 1596 else 1597 sp = ipsec_getpolicybysock(m, dir, inp, &error); 1598 1599 if (sp != NULL) { 1600 size = ipsec_hdrsiz(sp); 1601 KEYDEBUG(KEYDEBUG_IPSEC_DATA, 1602 printf("ipsec4_hdrsiz: size:%lu.\n", 1603 (unsigned long)size)); 1604 1605 KEY_FREESP(&sp); 1606 } else { 1607 size = 0; /* XXX should be panic ? */ 1608 } 1609 return size; 1610 } 1611 1612 #ifdef INET6 1613 /* This function is called from ipsec6_hdrsize_tcp(), 1614 * and maybe from ip6_forward.() 1615 */ 1616 size_t 1617 ipsec6_hdrsiz(m, dir, in6p) 1618 struct mbuf *m; 1619 u_int dir; 1620 struct in6pcb *in6p; 1621 { 1622 struct secpolicy *sp; 1623 int error; 1624 size_t size; 1625 1626 IPSEC_ASSERT(m != NULL, ("ipsec6_hdrsiz: null mbuf")); 1627 IPSEC_ASSERT(in6p == NULL || in6p->in6p_socket != NULL, 1628 ("ipsec6_hdrsize: socket w/o inpcb")); 1629 1630 /* get SP for this packet */ 1631 /* XXX Is it right to call with IP_FORWARDING. */ 1632 if (in6p == NULL) 1633 sp = ipsec_getpolicybyaddr(m, dir, IP_FORWARDING, &error); 1634 else 1635 sp = ipsec_getpolicybysock(m, dir, in6p, &error); 1636 1637 if (sp == NULL) 1638 return 0; 1639 size = ipsec_hdrsiz(sp); 1640 KEYDEBUG(KEYDEBUG_IPSEC_DATA, 1641 printf("ipsec6_hdrsiz: size:%lu.\n", (unsigned long)size)); 1642 KEY_FREESP(&sp); 1643 1644 return size; 1645 } 1646 #endif /*INET6*/ 1647 1648 /* 1649 * Check the variable replay window. 1650 * ipsec_chkreplay() performs replay check before ICV verification. 1651 * ipsec_updatereplay() updates replay bitmap. This must be called after 1652 * ICV verification (it also performs replay check, which is usually done 1653 * beforehand). 1654 * 0 (zero) is returned if packet disallowed, 1 if packet permitted. 1655 * 1656 * based on RFC 2401. 1657 */ 1658 int 1659 ipsec_chkreplay(seq, sav) 1660 u_int32_t seq; 1661 struct secasvar *sav; 1662 { 1663 const struct secreplay *replay; 1664 u_int32_t diff; 1665 int fr; 1666 u_int32_t wsizeb; /* constant: bits of window size */ 1667 int frlast; /* constant: last frame */ 1668 1669 IPSEC_SPLASSERT_SOFTNET("ipsec_chkreplay"); 1670 1671 IPSEC_ASSERT(sav != NULL, ("ipsec_chkreplay: Null SA")); 1672 IPSEC_ASSERT(sav->replay != NULL, ("ipsec_chkreplay: Null replay state")); 1673 1674 replay = sav->replay; 1675 1676 if (replay->wsize == 0) 1677 return 1; /* no need to check replay. */ 1678 1679 /* constant */ 1680 frlast = replay->wsize - 1; 1681 wsizeb = replay->wsize << 3; 1682 1683 /* sequence number of 0 is invalid */ 1684 if (seq == 0) 1685 return 0; 1686 1687 /* first time is always okay */ 1688 if (replay->count == 0) 1689 return 1; 1690 1691 if (seq > replay->lastseq) { 1692 /* larger sequences are okay */ 1693 return 1; 1694 } else { 1695 /* seq is equal or less than lastseq. */ 1696 diff = replay->lastseq - seq; 1697 1698 /* over range to check, i.e. too old or wrapped */ 1699 if (diff >= wsizeb) 1700 return 0; 1701 1702 fr = frlast - diff / 8; 1703 1704 /* this packet already seen ? */ 1705 if ((replay->bitmap)[fr] & (1 << (diff % 8))) 1706 return 0; 1707 1708 /* out of order but good */ 1709 return 1; 1710 } 1711 } 1712 1713 /* 1714 * check replay counter whether to update or not. 1715 * OUT: 0: OK 1716 * 1: NG 1717 */ 1718 int 1719 ipsec_updatereplay(seq, sav) 1720 u_int32_t seq; 1721 struct secasvar *sav; 1722 { 1723 struct secreplay *replay; 1724 u_int32_t diff; 1725 int fr; 1726 u_int32_t wsizeb; /* constant: bits of window size */ 1727 int frlast; /* constant: last frame */ 1728 1729 IPSEC_SPLASSERT_SOFTNET("ipsec_updatereplay"); 1730 1731 IPSEC_ASSERT(sav != NULL, ("ipsec_updatereplay: Null SA")); 1732 IPSEC_ASSERT(sav->replay != NULL, ("ipsec_updatereplay: Null replay state")); 1733 1734 replay = sav->replay; 1735 1736 if (replay->wsize == 0) 1737 goto ok; /* no need to check replay. */ 1738 1739 /* constant */ 1740 frlast = replay->wsize - 1; 1741 wsizeb = replay->wsize << 3; 1742 1743 /* sequence number of 0 is invalid */ 1744 if (seq == 0) 1745 return 1; 1746 1747 /* first time */ 1748 if (replay->count == 0) { 1749 replay->lastseq = seq; 1750 bzero(replay->bitmap, replay->wsize); 1751 (replay->bitmap)[frlast] = 1; 1752 goto ok; 1753 } 1754 1755 if (seq > replay->lastseq) { 1756 /* seq is larger than lastseq. */ 1757 diff = seq - replay->lastseq; 1758 1759 /* new larger sequence number */ 1760 if (diff < wsizeb) { 1761 /* In window */ 1762 /* set bit for this packet */ 1763 vshiftl(replay->bitmap, diff, replay->wsize); 1764 (replay->bitmap)[frlast] |= 1; 1765 } else { 1766 /* this packet has a "way larger" */ 1767 bzero(replay->bitmap, replay->wsize); 1768 (replay->bitmap)[frlast] = 1; 1769 } 1770 replay->lastseq = seq; 1771 1772 /* larger is good */ 1773 } else { 1774 /* seq is equal or less than lastseq. */ 1775 diff = replay->lastseq - seq; 1776 1777 /* over range to check, i.e. too old or wrapped */ 1778 if (diff >= wsizeb) 1779 return 1; 1780 1781 fr = frlast - diff / 8; 1782 1783 /* this packet already seen ? */ 1784 if ((replay->bitmap)[fr] & (1 << (diff % 8))) 1785 return 1; 1786 1787 /* mark as seen */ 1788 (replay->bitmap)[fr] |= (1 << (diff % 8)); 1789 1790 /* out of order but good */ 1791 } 1792 1793 ok: 1794 if (replay->count == ~0) { 1795 1796 /* set overflow flag */ 1797 replay->overflow++; 1798 1799 /* don't increment, no more packets accepted */ 1800 if ((sav->flags & SADB_X_EXT_CYCSEQ) == 0) 1801 return 1; 1802 1803 ipseclog((LOG_WARNING, "replay counter made %d cycle. %s\n", 1804 replay->overflow, ipsec_logsastr(sav))); 1805 } 1806 1807 replay->count++; 1808 1809 return 0; 1810 } 1811 1812 /* 1813 * shift variable length bunffer to left. 1814 * IN: bitmap: pointer to the buffer 1815 * nbit: the number of to shift. 1816 * wsize: buffer size (bytes). 1817 */ 1818 static void 1819 vshiftl(bitmap, nbit, wsize) 1820 unsigned char *bitmap; 1821 int nbit, wsize; 1822 { 1823 int s, j, i; 1824 unsigned char over; 1825 1826 for (j = 0; j < nbit; j += 8) { 1827 s = (nbit - j < 8) ? (nbit - j): 8; 1828 bitmap[0] <<= s; 1829 for (i = 1; i < wsize; i++) { 1830 over = (bitmap[i] >> (8 - s)); 1831 bitmap[i] <<= s; 1832 bitmap[i-1] |= over; 1833 } 1834 } 1835 1836 return; 1837 } 1838 1839 /* Return a printable string for the IPv4 address. */ 1840 static char * 1841 inet_ntoa4(struct in_addr ina) 1842 { 1843 static char buf[4][4 * sizeof "123" + 4]; 1844 unsigned char *ucp = (unsigned char *) &ina; 1845 static int i = 3; 1846 1847 i = (i + 1) % 4; 1848 sprintf(buf[i], "%d.%d.%d.%d", ucp[0] & 0xff, ucp[1] & 0xff, 1849 ucp[2] & 0xff, ucp[3] & 0xff); 1850 return (buf[i]); 1851 } 1852 1853 /* Return a printable string for the address. */ 1854 char * 1855 ipsec_address(union sockaddr_union* sa) 1856 { 1857 switch (sa->sa.sa_family) { 1858 #if INET 1859 case AF_INET: 1860 return inet_ntoa4(sa->sin.sin_addr); 1861 #endif /* INET */ 1862 1863 #if INET6 1864 case AF_INET6: 1865 return ip6_sprintf(&sa->sin6.sin6_addr); 1866 #endif /* INET6 */ 1867 1868 default: 1869 return "(unknown address family)"; 1870 } 1871 } 1872 1873 const char * 1874 ipsec_logsastr(sav) 1875 struct secasvar *sav; 1876 { 1877 static char buf[256]; 1878 char *p; 1879 struct secasindex *saidx = &sav->sah->saidx; 1880 1881 IPSEC_ASSERT(saidx->src.sa.sa_family == saidx->dst.sa.sa_family, 1882 ("ipsec_logsastr: address family mismatch")); 1883 1884 p = buf; 1885 snprintf(buf, sizeof(buf), "SA(SPI=%u ", (u_int32_t)ntohl(sav->spi)); 1886 while (p && *p) 1887 p++; 1888 /* NB: only use ipsec_address on one address at a time */ 1889 snprintf(p, sizeof (buf) - (p - buf), "src=%s ", 1890 ipsec_address(&saidx->src)); 1891 while (p && *p) 1892 p++; 1893 snprintf(p, sizeof (buf) - (p - buf), "dst=%s)", 1894 ipsec_address(&saidx->dst)); 1895 1896 return buf; 1897 } 1898 1899 void 1900 ipsec_dumpmbuf(m) 1901 struct mbuf *m; 1902 { 1903 int totlen; 1904 int i; 1905 u_char *p; 1906 1907 totlen = 0; 1908 printf("---\n"); 1909 while (m) { 1910 p = mtod(m, u_char *); 1911 for (i = 0; i < m->m_len; i++) { 1912 printf("%02x ", p[i]); 1913 totlen++; 1914 if (totlen % 16 == 0) 1915 printf("\n"); 1916 } 1917 m = m->m_next; 1918 } 1919 if (totlen % 16 != 0) 1920 printf("\n"); 1921 printf("---\n"); 1922 } 1923 1924 /* XXX this stuff doesn't belong here... */ 1925 1926 static struct xformsw* xforms = NULL; 1927 1928 /* 1929 * Register a transform; typically at system startup. 1930 */ 1931 void 1932 xform_register(struct xformsw* xsp) 1933 { 1934 xsp->xf_next = xforms; 1935 xforms = xsp; 1936 } 1937 1938 /* 1939 * Initialize transform support in an sav. 1940 */ 1941 int 1942 xform_init(struct secasvar *sav, int xftype) 1943 { 1944 struct xformsw *xsp; 1945 1946 if (sav->tdb_xform != NULL) /* previously initialized */ 1947 return 0; 1948 for (xsp = xforms; xsp; xsp = xsp->xf_next) 1949 if (xsp->xf_type == xftype) 1950 return (*xsp->xf_init)(sav, xsp); 1951 1952 DPRINTF(("xform_init: no match for xform type %d\n", xftype)); 1953 return EINVAL; 1954 } 1955 1956 #ifdef __NetBSD__ 1957 void 1958 ipsec_attach(void) 1959 { 1960 printf("initializing IPsec..."); 1961 ah_attach(); 1962 esp_attach(); 1963 ipcomp_attach(); 1964 ipe4_attach(); 1965 printf(" done\n"); 1966 } 1967 #endif /* __NetBSD__ */ 1968
Indexes created Sun Sep 21 20:09:37 GMT 2025