xform_ipcomp.c revision 1.29.6.2
1 /* $NetBSD: xform_ipcomp.c,v 1.29.6.2 2014/08/20 00:04:36 tls Exp $ */ 2 /* $FreeBSD: src/sys/netipsec/xform_ipcomp.c,v 1.1.4.1 2003/01/24 05:11:36 sam Exp $ */ 3 /* $OpenBSD: ip_ipcomp.c,v 1.1 2001/07/05 12:08:52 jjbg Exp $ */ 4 5 /* 6 * Copyright (c) 2001 Jean-Jacques Bernard-Gundol (jj (at) wabbitt.org) 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 * 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. The name of the author may not be used to endorse or promote products 18 * derived from this software without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 21 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 22 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 23 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 24 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 25 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 26 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 27 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 28 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 29 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include <sys/cdefs.h> 33 __KERNEL_RCSID(0, "$NetBSD: xform_ipcomp.c,v 1.29.6.2 2014/08/20 00:04:36 tls Exp $"); 34 35 /* IP payload compression protocol (IPComp), see RFC 2393 */ 36 #include "opt_inet.h" 37 #ifdef __FreeBSD__ 38 #include "opt_inet6.h" 39 #endif 40 41 #include <sys/param.h> 42 #include <sys/systm.h> 43 #include <sys/mbuf.h> 44 #include <sys/socket.h> 45 #include <sys/kernel.h> 46 #include <sys/protosw.h> 47 #include <sys/sysctl.h> 48 #include <sys/socketvar.h> /* for softnet_lock */ 49 50 #include <netinet/in.h> 51 #include <netinet/in_systm.h> 52 #include <netinet/ip.h> 53 #include <netinet/ip_var.h> 54 55 #include <net/route.h> 56 #include <netipsec/ipsec.h> 57 #include <netipsec/ipsec_private.h> 58 #include <netipsec/xform.h> 59 60 #ifdef INET6 61 #include <netinet/ip6.h> 62 #include <netipsec/ipsec6.h> 63 #endif 64 65 #include <netipsec/ipcomp.h> 66 #include <netipsec/ipcomp_var.h> 67 68 #include <netipsec/key.h> 69 #include <netipsec/key_debug.h> 70 71 #include <netipsec/ipsec_osdep.h> 72 73 #include <opencrypto/cryptodev.h> 74 #include <opencrypto/deflate.h> 75 #include <opencrypto/xform.h> 76 77 percpu_t *ipcompstat_percpu; 78 79 int ipcomp_enable = 1; 80 81 #ifdef __FreeBSD__ 82 SYSCTL_DECL(_net_inet_ipcomp); 83 SYSCTL_INT(_net_inet_ipcomp, OID_AUTO, 84 ipcomp_enable, CTLFLAG_RW, &ipcomp_enable, 0, ""); 85 SYSCTL_STRUCT(_net_inet_ipcomp, IPSECCTL_STATS, 86 stats, CTLFLAG_RD, &ipcompstat, ipcompstat, ""); 87 #endif /* __FreeBSD__ */ 88 89 static int ipcomp_input_cb(struct cryptop *crp); 90 static int ipcomp_output_cb(struct cryptop *crp); 91 92 const struct comp_algo * 93 ipcomp_algorithm_lookup(int alg) 94 { 95 if (alg >= IPCOMP_ALG_MAX) 96 return NULL; 97 switch (alg) { 98 case SADB_X_CALG_DEFLATE: 99 return &comp_algo_deflate_nogrow; 100 } 101 return NULL; 102 } 103 104 /* 105 * ipcomp_init() is called when an CPI is being set up. 106 */ 107 static int 108 ipcomp_init(struct secasvar *sav, const struct xformsw *xsp) 109 { 110 const struct comp_algo *tcomp; 111 struct cryptoini cric; 112 int ses; 113 114 /* NB: algorithm really comes in alg_enc and not alg_comp! */ 115 tcomp = ipcomp_algorithm_lookup(sav->alg_enc); 116 if (tcomp == NULL) { 117 DPRINTF(("ipcomp_init: unsupported compression algorithm %d\n", 118 sav->alg_comp)); 119 return EINVAL; 120 } 121 sav->alg_comp = sav->alg_enc; /* set for doing histogram */ 122 sav->tdb_xform = xsp; 123 sav->tdb_compalgxform = tcomp; 124 125 /* Initialize crypto session */ 126 memset(&cric, 0, sizeof (cric)); 127 cric.cri_alg = sav->tdb_compalgxform->type; 128 129 ses = crypto_newsession(&sav->tdb_cryptoid, &cric, crypto_support); 130 return ses; 131 } 132 133 /* 134 * ipcomp_zeroize() used when IPCA is deleted 135 */ 136 static int 137 ipcomp_zeroize(struct secasvar *sav) 138 { 139 int err; 140 141 err = crypto_freesession(sav->tdb_cryptoid); 142 sav->tdb_cryptoid = 0; 143 return err; 144 } 145 146 /* 147 * ipcomp_input() gets called to uncompress an input packet 148 */ 149 static int 150 ipcomp_input(struct mbuf *m, const struct secasvar *sav, int skip, int protoff) 151 { 152 struct tdb_crypto *tc; 153 struct cryptodesc *crdc; 154 struct cryptop *crp; 155 int error, hlen = IPCOMP_HLENGTH; 156 157 IPSEC_SPLASSERT_SOFTNET("ipcomp_input"); 158 159 /* Get crypto descriptors */ 160 crp = crypto_getreq(1); 161 if (crp == NULL) { 162 m_freem(m); 163 DPRINTF(("ipcomp_input: no crypto descriptors\n")); 164 IPCOMP_STATINC(IPCOMP_STAT_CRYPTO); 165 return ENOBUFS; 166 } 167 /* Get IPsec-specific opaque pointer */ 168 tc = (struct tdb_crypto *) malloc(sizeof (*tc), M_XDATA, M_NOWAIT|M_ZERO); 169 if (tc == NULL) { 170 m_freem(m); 171 crypto_freereq(crp); 172 DPRINTF(("ipcomp_input: cannot allocate tdb_crypto\n")); 173 IPCOMP_STATINC(IPCOMP_STAT_CRYPTO); 174 return ENOBUFS; 175 } 176 177 error = m_makewritable(&m, 0, m->m_pkthdr.len, M_NOWAIT); 178 if (error) { 179 DPRINTF(("ipcomp_input: m_makewritable failed\n")); 180 m_freem(m); 181 free(tc, M_XDATA); 182 crypto_freereq(crp); 183 IPCOMP_STATINC(IPCOMP_STAT_CRYPTO); 184 return error; 185 } 186 187 crdc = crp->crp_desc; 188 189 crdc->crd_skip = skip + hlen; 190 crdc->crd_len = m->m_pkthdr.len - (skip + hlen); 191 crdc->crd_inject = 0; /* unused */ 192 193 tc->tc_ptr = 0; 194 195 /* Decompression operation */ 196 crdc->crd_alg = sav->tdb_compalgxform->type; 197 198 /* Crypto operation descriptor */ 199 crp->crp_ilen = m->m_pkthdr.len - (skip + hlen); 200 crp->crp_olen = MCLBYTES; /* hint to decompression code */ 201 crp->crp_flags = CRYPTO_F_IMBUF; 202 crp->crp_buf = m; 203 crp->crp_callback = ipcomp_input_cb; 204 crp->crp_sid = sav->tdb_cryptoid; 205 crp->crp_opaque = tc; 206 207 /* These are passed as-is to the callback */ 208 tc->tc_spi = sav->spi; 209 tc->tc_dst = sav->sah->saidx.dst; 210 tc->tc_proto = sav->sah->saidx.proto; 211 tc->tc_protoff = protoff; 212 tc->tc_skip = skip; 213 214 return crypto_dispatch(crp); 215 } 216 217 #ifdef INET6 218 #define IPSEC_COMMON_INPUT_CB(m, sav, skip, protoff, mtag) do { \ 219 if (saidx->dst.sa.sa_family == AF_INET6) { \ 220 error = ipsec6_common_input_cb(m, sav, skip, protoff, mtag); \ 221 } else { \ 222 error = ipsec4_common_input_cb(m, sav, skip, protoff, mtag); \ 223 } \ 224 } while (0) 225 #else 226 #define IPSEC_COMMON_INPUT_CB(m, sav, skip, protoff, mtag) \ 227 (error = ipsec4_common_input_cb(m, sav, skip, protoff, mtag)) 228 #endif 229 230 /* 231 * IPComp input callback from the crypto driver. 232 */ 233 static int 234 ipcomp_input_cb(struct cryptop *crp) 235 { 236 struct tdb_crypto *tc; 237 int skip, protoff; 238 struct mbuf *m; 239 struct secasvar *sav; 240 struct secasindex *saidx __diagused; 241 int s, hlen = IPCOMP_HLENGTH, error, clen; 242 u_int8_t nproto; 243 void *addr; 244 u_int16_t dport; 245 u_int16_t sport; 246 247 tc = (struct tdb_crypto *) crp->crp_opaque; 248 IPSEC_ASSERT(tc != NULL, ("ipcomp_input_cb: null opaque crypto data area!")); 249 skip = tc->tc_skip; 250 protoff = tc->tc_protoff; 251 m = (struct mbuf *) crp->crp_buf; 252 253 /* find the source port for NAT-T */ 254 nat_t_ports_get(m, &dport, &sport); 255 256 s = splsoftnet(); 257 mutex_enter(softnet_lock); 258 259 sav = KEY_ALLOCSA(&tc->tc_dst, tc->tc_proto, tc->tc_spi, sport, dport); 260 if (sav == NULL) { 261 IPCOMP_STATINC(IPCOMP_STAT_NOTDB); 262 DPRINTF(("ipcomp_input_cb: SA expired while in crypto\n")); 263 error = ENOBUFS; /*XXX*/ 264 goto bad; 265 } 266 267 saidx = &sav->sah->saidx; 268 IPSEC_ASSERT(saidx->dst.sa.sa_family == AF_INET || 269 saidx->dst.sa.sa_family == AF_INET6, 270 ("ipcomp_input_cb: unexpected protocol family %u", 271 saidx->dst.sa.sa_family)); 272 273 /* Check for crypto errors */ 274 if (crp->crp_etype) { 275 /* Reset the session ID */ 276 if (sav->tdb_cryptoid != 0) 277 sav->tdb_cryptoid = crp->crp_sid; 278 279 if (crp->crp_etype == EAGAIN) { 280 KEY_FREESAV(&sav); 281 mutex_exit(softnet_lock); 282 splx(s); 283 return crypto_dispatch(crp); 284 } 285 286 IPCOMP_STATINC(IPCOMP_STAT_NOXFORM); 287 DPRINTF(("ipcomp_input_cb: crypto error %d\n", crp->crp_etype)); 288 error = crp->crp_etype; 289 goto bad; 290 } 291 /* Shouldn't happen... */ 292 if (m == NULL) { 293 IPCOMP_STATINC(IPCOMP_STAT_CRYPTO); 294 DPRINTF(("ipcomp_input_cb: null mbuf returned from crypto\n")); 295 error = EINVAL; 296 goto bad; 297 } 298 IPCOMP_STATINC(IPCOMP_STAT_HIST + sav->alg_comp); 299 300 /* Update the counters */ 301 IPCOMP_STATADD(IPCOMP_STAT_IBYTES, m->m_pkthdr.len - skip - hlen); 302 303 304 clen = crp->crp_olen; /* Length of data after processing */ 305 306 /* Release the crypto descriptors */ 307 free(tc, M_XDATA), tc = NULL; 308 crypto_freereq(crp), crp = NULL; 309 310 /* In case it's not done already, adjust the size of the mbuf chain */ 311 m->m_pkthdr.len = clen + hlen + skip; 312 313 if (m->m_len < skip + hlen && (m = m_pullup(m, skip + hlen)) == 0) { 314 IPCOMP_STATINC(IPCOMP_STAT_HDROPS); /*XXX*/ 315 DPRINTF(("ipcomp_input_cb: m_pullup failed\n")); 316 error = EINVAL; /*XXX*/ 317 goto bad; 318 } 319 320 /* Keep the next protocol field */ 321 addr = (uint8_t*) mtod(m, struct ip *) + skip; 322 nproto = ((struct ipcomp *) addr)->comp_nxt; 323 if (nproto == IPPROTO_IPCOMP || nproto == IPPROTO_AH || nproto == IPPROTO_ESP) { 324 IPCOMP_STATINC(IPCOMP_STAT_HDROPS); 325 DPRINTF(("ipcomp_input_cb: nested ipcomp, IPCA %s/%08lx\n", 326 ipsec_address(&sav->sah->saidx.dst), 327 (u_long) ntohl(sav->spi))); 328 error = EINVAL; 329 goto bad; 330 } 331 332 /* Remove the IPCOMP header */ 333 error = m_striphdr(m, skip, hlen); 334 if (error) { 335 IPCOMP_STATINC(IPCOMP_STAT_HDROPS); 336 DPRINTF(("ipcomp_input_cb: bad mbuf chain, IPCA %s/%08lx\n", 337 ipsec_address(&sav->sah->saidx.dst), 338 (u_long) ntohl(sav->spi))); 339 goto bad; 340 } 341 342 /* Restore the Next Protocol field */ 343 m_copyback(m, protoff, sizeof (u_int8_t), (u_int8_t *) &nproto); 344 345 IPSEC_COMMON_INPUT_CB(m, sav, skip, protoff, NULL); 346 347 KEY_FREESAV(&sav); 348 mutex_exit(softnet_lock); 349 splx(s); 350 return error; 351 bad: 352 if (sav) 353 KEY_FREESAV(&sav); 354 mutex_exit(softnet_lock); 355 splx(s); 356 if (m) 357 m_freem(m); 358 if (tc != NULL) 359 free(tc, M_XDATA); 360 if (crp) 361 crypto_freereq(crp); 362 return error; 363 } 364 365 /* 366 * IPComp output routine, called by ipsec[46]_process_packet() 367 */ 368 static int 369 ipcomp_output( 370 struct mbuf *m, 371 struct ipsecrequest *isr, 372 struct mbuf **mp, 373 int skip, 374 int protoff 375 ) 376 { 377 const struct secasvar *sav; 378 const struct comp_algo *ipcompx; 379 int error, ralen, hlen, maxpacketsize; 380 struct cryptodesc *crdc; 381 struct cryptop *crp; 382 struct tdb_crypto *tc; 383 384 IPSEC_SPLASSERT_SOFTNET("ipcomp_output"); 385 sav = isr->sav; 386 IPSEC_ASSERT(sav != NULL, ("ipcomp_output: null SA")); 387 ipcompx = sav->tdb_compalgxform; 388 IPSEC_ASSERT(ipcompx != NULL, ("ipcomp_output: null compression xform")); 389 390 ralen = m->m_pkthdr.len - skip; /* Raw payload length before comp. */ 391 392 /* Don't process the packet if it is too short */ 393 if (ralen < ipcompx->minlen) { 394 IPCOMP_STATINC(IPCOMP_STAT_MINLEN); 395 return ipsec_process_done(m,isr); 396 } 397 398 hlen = IPCOMP_HLENGTH; 399 400 IPCOMP_STATINC(IPCOMP_STAT_OUTPUT); 401 402 /* Check for maximum packet size violations. */ 403 switch (sav->sah->saidx.dst.sa.sa_family) { 404 #ifdef INET 405 case AF_INET: 406 maxpacketsize = IP_MAXPACKET; 407 break; 408 #endif /* INET */ 409 #ifdef INET6 410 case AF_INET6: 411 maxpacketsize = IPV6_MAXPACKET; 412 break; 413 #endif /* INET6 */ 414 default: 415 IPCOMP_STATINC(IPCOMP_STAT_NOPF); 416 DPRINTF(("ipcomp_output: unknown/unsupported protocol family %d" 417 ", IPCA %s/%08lx\n", 418 sav->sah->saidx.dst.sa.sa_family, 419 ipsec_address(&sav->sah->saidx.dst), 420 (u_long) ntohl(sav->spi))); 421 error = EPFNOSUPPORT; 422 goto bad; 423 } 424 if (skip + hlen + ralen > maxpacketsize) { 425 IPCOMP_STATINC(IPCOMP_STAT_TOOBIG); 426 DPRINTF(("ipcomp_output: packet in IPCA %s/%08lx got too big " 427 "(len %u, max len %u)\n", 428 ipsec_address(&sav->sah->saidx.dst), 429 (u_long) ntohl(sav->spi), 430 skip + hlen + ralen, maxpacketsize)); 431 error = EMSGSIZE; 432 goto bad; 433 } 434 435 /* Update the counters */ 436 IPCOMP_STATADD(IPCOMP_STAT_OBYTES, m->m_pkthdr.len - skip); 437 438 m = m_clone(m); 439 if (m == NULL) { 440 IPCOMP_STATINC(IPCOMP_STAT_HDROPS); 441 DPRINTF(("ipcomp_output: cannot clone mbuf chain, IPCA %s/%08lx\n", 442 ipsec_address(&sav->sah->saidx.dst), 443 (u_long) ntohl(sav->spi))); 444 error = ENOBUFS; 445 goto bad; 446 } 447 448 /* Ok now, we can pass to the crypto processing */ 449 450 /* Get crypto descriptors */ 451 crp = crypto_getreq(1); 452 if (crp == NULL) { 453 IPCOMP_STATINC(IPCOMP_STAT_CRYPTO); 454 DPRINTF(("ipcomp_output: failed to acquire crypto descriptor\n")); 455 error = ENOBUFS; 456 goto bad; 457 } 458 crdc = crp->crp_desc; 459 460 /* Compression descriptor */ 461 crdc->crd_skip = skip; 462 crdc->crd_len = m->m_pkthdr.len - skip; 463 crdc->crd_flags = CRD_F_COMP; 464 crdc->crd_inject = skip; 465 466 /* Compression operation */ 467 crdc->crd_alg = ipcompx->type; 468 469 /* IPsec-specific opaque crypto info */ 470 tc = (struct tdb_crypto *) malloc(sizeof(struct tdb_crypto), 471 M_XDATA, M_NOWAIT|M_ZERO); 472 if (tc == NULL) { 473 IPCOMP_STATINC(IPCOMP_STAT_CRYPTO); 474 DPRINTF(("ipcomp_output: failed to allocate tdb_crypto\n")); 475 crypto_freereq(crp); 476 error = ENOBUFS; 477 goto bad; 478 } 479 480 tc->tc_isr = isr; 481 tc->tc_spi = sav->spi; 482 tc->tc_dst = sav->sah->saidx.dst; 483 tc->tc_proto = sav->sah->saidx.proto; 484 tc->tc_skip = skip; 485 tc->tc_protoff = protoff; 486 487 /* Crypto operation descriptor */ 488 crp->crp_ilen = m->m_pkthdr.len; /* Total input length */ 489 crp->crp_flags = CRYPTO_F_IMBUF; 490 crp->crp_buf = m; 491 crp->crp_callback = ipcomp_output_cb; 492 crp->crp_opaque = tc; 493 crp->crp_sid = sav->tdb_cryptoid; 494 495 return crypto_dispatch(crp); 496 bad: 497 if (m) 498 m_freem(m); 499 return (error); 500 } 501 502 /* 503 * IPComp output callback from the crypto driver. 504 */ 505 static int 506 ipcomp_output_cb(struct cryptop *crp) 507 { 508 struct tdb_crypto *tc; 509 struct ipsecrequest *isr; 510 struct secasvar *sav; 511 struct mbuf *m, *mo; 512 int s, error, skip, rlen, roff; 513 u_int8_t prot; 514 u_int16_t cpi; 515 struct ipcomp * ipcomp; 516 517 518 tc = (struct tdb_crypto *) crp->crp_opaque; 519 IPSEC_ASSERT(tc != NULL, ("ipcomp_output_cb: null opaque data area!")); 520 m = (struct mbuf *) crp->crp_buf; 521 skip = tc->tc_skip; 522 rlen = crp->crp_ilen - skip; 523 524 s = splsoftnet(); 525 mutex_enter(softnet_lock); 526 527 isr = tc->tc_isr; 528 sav = KEY_ALLOCSA(&tc->tc_dst, tc->tc_proto, tc->tc_spi, 0, 0); 529 if (sav == NULL) { 530 IPCOMP_STATINC(IPCOMP_STAT_NOTDB); 531 DPRINTF(("ipcomp_output_cb: SA expired while in crypto\n")); 532 error = ENOBUFS; /*XXX*/ 533 goto bad; 534 } 535 IPSEC_ASSERT(isr->sav == sav, ("ipcomp_output_cb: SA changed\n")); 536 537 /* Check for crypto errors */ 538 if (crp->crp_etype) { 539 /* Reset session ID */ 540 if (sav->tdb_cryptoid != 0) 541 sav->tdb_cryptoid = crp->crp_sid; 542 543 if (crp->crp_etype == EAGAIN) { 544 KEY_FREESAV(&sav); 545 mutex_exit(softnet_lock); 546 splx(s); 547 return crypto_dispatch(crp); 548 } 549 IPCOMP_STATINC(IPCOMP_STAT_NOXFORM); 550 DPRINTF(("ipcomp_output_cb: crypto error %d\n", crp->crp_etype)); 551 error = crp->crp_etype; 552 goto bad; 553 } 554 /* Shouldn't happen... */ 555 if (m == NULL) { 556 IPCOMP_STATINC(IPCOMP_STAT_CRYPTO); 557 DPRINTF(("ipcomp_output_cb: bogus return buffer from crypto\n")); 558 error = EINVAL; 559 goto bad; 560 } 561 IPCOMP_STATINC(IPCOMP_STAT_HIST + sav->alg_comp); 562 563 if (rlen > crp->crp_olen) { 564 /* Inject IPCOMP header */ 565 mo = m_makespace(m, skip, IPCOMP_HLENGTH, &roff); 566 if (mo == NULL) { 567 IPCOMP_STATINC(IPCOMP_STAT_WRAP); 568 DPRINTF(("ipcomp_output: failed to inject IPCOMP header for " 569 "IPCA %s/%08lx\n", 570 ipsec_address(&sav->sah->saidx.dst), 571 (u_long) ntohl(sav->spi))); 572 error = ENOBUFS; 573 goto bad; 574 } 575 ipcomp = (struct ipcomp *)(mtod(mo, char *) + roff); 576 577 /* Initialize the IPCOMP header */ 578 /* XXX alignment always correct? */ 579 switch (sav->sah->saidx.dst.sa.sa_family) { 580 #ifdef INET 581 case AF_INET: 582 ipcomp->comp_nxt = mtod(m, struct ip *)->ip_p; 583 break; 584 #endif /* INET */ 585 #ifdef INET6 586 case AF_INET6: 587 ipcomp->comp_nxt = mtod(m, struct ip6_hdr *)->ip6_nxt; 588 break; 589 #endif 590 } 591 ipcomp->comp_flags = 0; 592 593 if ((sav->flags & SADB_X_EXT_RAWCPI) == 0) 594 cpi = sav->alg_enc; 595 else 596 cpi = ntohl(sav->spi) & 0xffff; 597 ipcomp->comp_cpi = htons(cpi); 598 599 /* Fix Next Protocol in IPv4/IPv6 header */ 600 prot = IPPROTO_IPCOMP; 601 m_copyback(m, tc->tc_protoff, sizeof(u_int8_t), (u_char *)&prot); 602 603 /* Adjust the length in the IP header */ 604 switch (sav->sah->saidx.dst.sa.sa_family) { 605 #ifdef INET 606 case AF_INET: 607 mtod(m, struct ip *)->ip_len = htons(m->m_pkthdr.len); 608 break; 609 #endif /* INET */ 610 #ifdef INET6 611 case AF_INET6: 612 mtod(m, struct ip6_hdr *)->ip6_plen = 613 htons(m->m_pkthdr.len) - sizeof(struct ip6_hdr); 614 break; 615 #endif /* INET6 */ 616 default: 617 IPCOMP_STATINC(IPCOMP_STAT_NOPF); 618 DPRINTF(("ipcomp_output: unknown/unsupported protocol " 619 "family %d, IPCA %s/%08lx\n", 620 sav->sah->saidx.dst.sa.sa_family, 621 ipsec_address(&sav->sah->saidx.dst), 622 (u_long) ntohl(sav->spi))); 623 error = EPFNOSUPPORT; 624 goto bad; 625 } 626 } else { 627 /* compression was useless, we have lost time */ 628 IPCOMP_STATINC(IPCOMP_STAT_USELESS); 629 DPRINTF(("ipcomp_output_cb: compression was useless : initial size was %d" 630 "and compressed size is %d\n", rlen, crp->crp_olen)); 631 } 632 633 634 /* Release the crypto descriptor */ 635 free(tc, M_XDATA); 636 crypto_freereq(crp); 637 638 /* NB: m is reclaimed by ipsec_process_done. */ 639 error = ipsec_process_done(m, isr); 640 KEY_FREESAV(&sav); 641 mutex_exit(softnet_lock); 642 splx(s); 643 return error; 644 bad: 645 if (sav) 646 KEY_FREESAV(&sav); 647 mutex_exit(softnet_lock); 648 splx(s); 649 if (m) 650 m_freem(m); 651 free(tc, M_XDATA); 652 crypto_freereq(crp); 653 return error; 654 } 655 656 static struct xformsw ipcomp_xformsw = { 657 XF_IPCOMP, XFT_COMP, "IPcomp", 658 ipcomp_init, ipcomp_zeroize, ipcomp_input, 659 ipcomp_output, 660 NULL, 661 }; 662 663 INITFN void 664 ipcomp_attach(void) 665 { 666 ipcompstat_percpu = percpu_alloc(sizeof(uint64_t) * IPCOMP_NSTATS); 667 xform_register(&ipcomp_xformsw); 668 } 669 670 #ifdef __FreeBSD__ 671 SYSINIT(ipcomp_xform_init, SI_SUB_DRIVERS, SI_ORDER_FIRST, ipcomp_attach, NULL) 672 #endif /* __FreeBSD__ */ 673
Indexes created Tue Sep 30 20:09:53 GMT 2025