xform_ipcomp.c revision 1.22
1 /* $NetBSD: xform_ipcomp.c,v 1.22 2011/02/14 13:43:45 drochner 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 1.22 2011/02/14 13:43:45 drochner 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 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; 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, struct xformsw *xsp) 109 { 110 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 mutex_spin_enter(&crypto_mtx); 130 ses = crypto_newsession(&sav->tdb_cryptoid, &cric, crypto_support); 131 mutex_spin_exit(&crypto_mtx); 132 return ses; 133 } 134 135 /* 136 * ipcomp_zeroize() used when IPCA is deleted 137 */ 138 static int 139 ipcomp_zeroize(struct secasvar *sav) 140 { 141 int err; 142 143 mutex_spin_enter(&crypto_mtx); 144 err = crypto_freesession(sav->tdb_cryptoid); 145 mutex_spin_exit(&crypto_mtx); 146 sav->tdb_cryptoid = 0; 147 return err; 148 } 149 150 /* 151 * ipcomp_input() gets called to uncompress an input packet 152 */ 153 static int 154 ipcomp_input(struct mbuf *m, struct secasvar *sav, int skip, int protoff) 155 { 156 struct tdb_crypto *tc; 157 struct cryptodesc *crdc; 158 struct cryptop *crp; 159 int hlen = IPCOMP_HLENGTH; 160 161 IPSEC_SPLASSERT_SOFTNET("ipcomp_input"); 162 163 /* Get crypto descriptors */ 164 crp = crypto_getreq(1); 165 if (crp == NULL) { 166 m_freem(m); 167 DPRINTF(("ipcomp_input: no crypto descriptors\n")); 168 IPCOMP_STATINC(IPCOMP_STAT_CRYPTO); 169 return ENOBUFS; 170 } 171 /* Get IPsec-specific opaque pointer */ 172 tc = (struct tdb_crypto *) malloc(sizeof (*tc), M_XDATA, M_NOWAIT|M_ZERO); 173 if (tc == NULL) { 174 m_freem(m); 175 crypto_freereq(crp); 176 DPRINTF(("ipcomp_input: cannot allocate tdb_crypto\n")); 177 IPCOMP_STATINC(IPCOMP_STAT_CRYPTO); 178 return ENOBUFS; 179 } 180 crdc = crp->crp_desc; 181 182 crdc->crd_skip = skip + hlen; 183 crdc->crd_len = m->m_pkthdr.len - (skip + hlen); 184 crdc->crd_inject = skip; 185 186 tc->tc_ptr = 0; 187 188 /* Decompression operation */ 189 crdc->crd_alg = sav->tdb_compalgxform->type; 190 191 /* Crypto operation descriptor */ 192 crp->crp_ilen = m->m_pkthdr.len - (skip + hlen); 193 crp->crp_flags = CRYPTO_F_IMBUF; 194 crp->crp_buf = m; 195 crp->crp_callback = ipcomp_input_cb; 196 crp->crp_sid = sav->tdb_cryptoid; 197 crp->crp_opaque = tc; 198 199 /* These are passed as-is to the callback */ 200 tc->tc_spi = sav->spi; 201 tc->tc_dst = sav->sah->saidx.dst; 202 tc->tc_proto = sav->sah->saidx.proto; 203 tc->tc_protoff = protoff; 204 tc->tc_skip = skip; 205 206 return crypto_dispatch(crp); 207 } 208 209 #ifdef INET6 210 #define IPSEC_COMMON_INPUT_CB(m, sav, skip, protoff, mtag) do { \ 211 if (saidx->dst.sa.sa_family == AF_INET6) { \ 212 error = ipsec6_common_input_cb(m, sav, skip, protoff, mtag); \ 213 } else { \ 214 error = ipsec4_common_input_cb(m, sav, skip, protoff, mtag); \ 215 } \ 216 } while (0) 217 #else 218 #define IPSEC_COMMON_INPUT_CB(m, sav, skip, protoff, mtag) \ 219 (error = ipsec4_common_input_cb(m, sav, skip, protoff, mtag)) 220 #endif 221 222 /* 223 * IPComp input callback from the crypto driver. 224 */ 225 static int 226 ipcomp_input_cb(struct cryptop *crp) 227 { 228 struct cryptodesc *crd; 229 struct tdb_crypto *tc; 230 int skip, protoff; 231 struct mtag *mtag; 232 struct mbuf *m; 233 struct secasvar *sav; 234 struct secasindex *saidx; 235 int s, hlen = IPCOMP_HLENGTH, error, clen; 236 u_int8_t nproto; 237 void *addr; 238 u_int16_t dport = 0; 239 u_int16_t sport = 0; 240 #ifdef IPSEC_NAT_T 241 struct m_tag * tag = NULL; 242 #endif 243 244 crd = crp->crp_desc; 245 246 tc = (struct tdb_crypto *) crp->crp_opaque; 247 IPSEC_ASSERT(tc != NULL, ("ipcomp_input_cb: null opaque crypto data area!")); 248 skip = tc->tc_skip; 249 protoff = tc->tc_protoff; 250 mtag = (struct mtag *) tc->tc_ptr; 251 m = (struct mbuf *) crp->crp_buf; 252 253 #ifdef IPSEC_NAT_T 254 /* find the source port for NAT-T */ 255 if ((tag = m_tag_find(m, PACKET_TAG_IPSEC_NAT_T_PORTS, NULL))) { 256 sport = ((u_int16_t *)(tag + 1))[0]; 257 dport = ((u_int16_t *)(tag + 1))[1]; 258 } 259 #endif 260 261 s = splsoftnet(); 262 mutex_enter(softnet_lock); 263 264 sav = KEY_ALLOCSA(&tc->tc_dst, tc->tc_proto, tc->tc_spi, sport, dport); 265 if (sav == NULL) { 266 IPCOMP_STATINC(IPCOMP_STAT_NOTDB); 267 DPRINTF(("ipcomp_input_cb: SA expired while in crypto\n")); 268 error = ENOBUFS; /*XXX*/ 269 goto bad; 270 } 271 272 saidx = &sav->sah->saidx; 273 IPSEC_ASSERT(saidx->dst.sa.sa_family == AF_INET || 274 saidx->dst.sa.sa_family == AF_INET6, 275 ("ah_input_cb: unexpected protocol family %u", 276 saidx->dst.sa.sa_family)); 277 278 /* Check for crypto errors */ 279 if (crp->crp_etype) { 280 /* Reset the session ID */ 281 if (sav->tdb_cryptoid != 0) 282 sav->tdb_cryptoid = crp->crp_sid; 283 284 if (crp->crp_etype == EAGAIN) { 285 KEY_FREESAV(&sav); 286 mutex_exit(softnet_lock); 287 splx(s); 288 return crypto_dispatch(crp); 289 } 290 291 IPCOMP_STATINC(IPCOMP_STAT_NOXFORM); 292 DPRINTF(("ipcomp_input_cb: crypto error %d\n", crp->crp_etype)); 293 error = crp->crp_etype; 294 goto bad; 295 } 296 /* Shouldn't happen... */ 297 if (m == NULL) { 298 IPCOMP_STATINC(IPCOMP_STAT_CRYPTO); 299 DPRINTF(("ipcomp_input_cb: null mbuf returned from crypto\n")); 300 error = EINVAL; 301 goto bad; 302 } 303 IPCOMP_STATINC(IPCOMP_STAT_HIST + sav->alg_comp); 304 305 /* Update the counters */ 306 IPCOMP_STATADD(IPCOMP_STAT_IBYTES, m->m_pkthdr.len - skip - hlen); 307 308 309 clen = crp->crp_olen; /* Length of data after processing */ 310 311 /* Release the crypto descriptors */ 312 free(tc, M_XDATA), tc = NULL; 313 crypto_freereq(crp), crp = NULL; 314 315 /* In case it's not done already, adjust the size of the mbuf chain */ 316 m->m_pkthdr.len = clen + hlen + skip; 317 318 if (m->m_len < skip + hlen && (m = m_pullup(m, skip + hlen)) == 0) { 319 IPCOMP_STATINC(IPCOMP_STAT_HDROPS); /*XXX*/ 320 DPRINTF(("ipcomp_input_cb: m_pullup failed\n")); 321 error = EINVAL; /*XXX*/ 322 goto bad; 323 } 324 325 /* Keep the next protocol field */ 326 addr = (uint8_t*) mtod(m, struct ip *) + skip; 327 nproto = ((struct ipcomp *) addr)->comp_nxt; 328 329 /* Remove the IPCOMP header */ 330 error = m_striphdr(m, skip, hlen); 331 if (error) { 332 IPCOMP_STATINC(IPCOMP_STAT_HDROPS); 333 DPRINTF(("ipcomp_input_cb: bad mbuf chain, IPCA %s/%08lx\n", 334 ipsec_address(&sav->sah->saidx.dst), 335 (u_long) ntohl(sav->spi))); 336 goto bad; 337 } 338 339 /* Restore the Next Protocol field */ 340 m_copyback(m, protoff, sizeof (u_int8_t), (u_int8_t *) &nproto); 341 342 IPSEC_COMMON_INPUT_CB(m, sav, skip, protoff, NULL); 343 344 KEY_FREESAV(&sav); 345 mutex_exit(softnet_lock); 346 splx(s); 347 return error; 348 bad: 349 if (sav) 350 KEY_FREESAV(&sav); 351 mutex_exit(softnet_lock); 352 splx(s); 353 if (m) 354 m_freem(m); 355 if (tc != NULL) 356 free(tc, M_XDATA); 357 if (crp) 358 crypto_freereq(crp); 359 return error; 360 } 361 362 /* 363 * IPComp output routine, called by ipsec[46]_process_packet() 364 */ 365 static int 366 ipcomp_output( 367 struct mbuf *m, 368 struct ipsecrequest *isr, 369 struct mbuf **mp, 370 int skip, 371 int protoff 372 ) 373 { 374 struct secasvar *sav; 375 struct comp_algo *ipcompx; 376 int error, ralen, hlen, maxpacketsize; 377 struct cryptodesc *crdc; 378 struct cryptop *crp; 379 struct tdb_crypto *tc; 380 381 IPSEC_SPLASSERT_SOFTNET("ipcomp_output"); 382 sav = isr->sav; 383 IPSEC_ASSERT(sav != NULL, ("ipcomp_output: null SA")); 384 ipcompx = sav->tdb_compalgxform; 385 IPSEC_ASSERT(ipcompx != NULL, ("ipcomp_output: null compression xform")); 386 387 ralen = m->m_pkthdr.len - skip; /* Raw payload length before comp. */ 388 389 /* Don't process the packet if it is too short */ 390 if (ralen < ipcompx->minlen) { 391 IPCOMP_STATINC(IPCOMP_STAT_MINLEN); 392 return ipsec_process_done(m,isr); 393 } 394 395 hlen = IPCOMP_HLENGTH; 396 397 IPCOMP_STATINC(IPCOMP_STAT_OUTPUT); 398 399 /* Check for maximum packet size violations. */ 400 switch (sav->sah->saidx.dst.sa.sa_family) { 401 #ifdef INET 402 case AF_INET: 403 maxpacketsize = IP_MAXPACKET; 404 break; 405 #endif /* INET */ 406 #ifdef INET6 407 case AF_INET6: 408 maxpacketsize = IPV6_MAXPACKET; 409 break; 410 #endif /* INET6 */ 411 default: 412 IPCOMP_STATINC(IPCOMP_STAT_NOPF); 413 DPRINTF(("ipcomp_output: unknown/unsupported protocol family %d" 414 ", IPCA %s/%08lx\n", 415 sav->sah->saidx.dst.sa.sa_family, 416 ipsec_address(&sav->sah->saidx.dst), 417 (u_long) ntohl(sav->spi))); 418 error = EPFNOSUPPORT; 419 goto bad; 420 } 421 if (skip + hlen + ralen > maxpacketsize) { 422 IPCOMP_STATINC(IPCOMP_STAT_TOOBIG); 423 DPRINTF(("ipcomp_output: packet in IPCA %s/%08lx got too big " 424 "(len %u, max len %u)\n", 425 ipsec_address(&sav->sah->saidx.dst), 426 (u_long) ntohl(sav->spi), 427 skip + hlen + ralen, maxpacketsize)); 428 error = EMSGSIZE; 429 goto bad; 430 } 431 432 /* Update the counters */ 433 IPCOMP_STATADD(IPCOMP_STAT_OBYTES, m->m_pkthdr.len - skip); 434 435 m = m_clone(m); 436 if (m == NULL) { 437 IPCOMP_STATINC(IPCOMP_STAT_HDROPS); 438 DPRINTF(("ipcomp_output: cannot clone mbuf chain, IPCA %s/%08lx\n", 439 ipsec_address(&sav->sah->saidx.dst), 440 (u_long) ntohl(sav->spi))); 441 error = ENOBUFS; 442 goto bad; 443 } 444 445 /* Ok now, we can pass to the crypto processing */ 446 447 /* Get crypto descriptors */ 448 crp = crypto_getreq(1); 449 if (crp == NULL) { 450 IPCOMP_STATINC(IPCOMP_STAT_CRYPTO); 451 DPRINTF(("ipcomp_output: failed to acquire crypto descriptor\n")); 452 error = ENOBUFS; 453 goto bad; 454 } 455 crdc = crp->crp_desc; 456 457 /* Compression descriptor */ 458 crdc->crd_skip = skip; 459 crdc->crd_len = m->m_pkthdr.len - skip; 460 crdc->crd_flags = CRD_F_COMP; 461 crdc->crd_inject = skip; 462 463 /* Compression operation */ 464 crdc->crd_alg = ipcompx->type; 465 466 /* IPsec-specific opaque crypto info */ 467 tc = (struct tdb_crypto *) malloc(sizeof(struct tdb_crypto), 468 M_XDATA, M_NOWAIT|M_ZERO); 469 if (tc == NULL) { 470 IPCOMP_STATINC(IPCOMP_STAT_CRYPTO); 471 DPRINTF(("ipcomp_output: failed to allocate tdb_crypto\n")); 472 crypto_freereq(crp); 473 error = ENOBUFS; 474 goto bad; 475 } 476 477 tc->tc_isr = isr; 478 tc->tc_spi = sav->spi; 479 tc->tc_dst = sav->sah->saidx.dst; 480 tc->tc_proto = sav->sah->saidx.proto; 481 tc->tc_skip = skip; 482 tc->tc_protoff = protoff; 483 484 /* Crypto operation descriptor */ 485 crp->crp_ilen = m->m_pkthdr.len; /* Total input length */ 486 crp->crp_flags = CRYPTO_F_IMBUF; 487 crp->crp_buf = m; 488 crp->crp_callback = ipcomp_output_cb; 489 crp->crp_opaque = tc; 490 crp->crp_sid = sav->tdb_cryptoid; 491 492 return crypto_dispatch(crp); 493 bad: 494 if (m) 495 m_freem(m); 496 return (error); 497 } 498 499 /* 500 * IPComp output callback from the crypto driver. 501 */ 502 static int 503 ipcomp_output_cb(struct cryptop *crp) 504 { 505 struct tdb_crypto *tc; 506 struct ipsecrequest *isr; 507 struct secasvar *sav; 508 struct mbuf *m, *mo; 509 int s, error, skip, rlen, roff; 510 u_int8_t prot; 511 u_int16_t cpi; 512 struct ipcomp * ipcomp; 513 514 515 tc = (struct tdb_crypto *) crp->crp_opaque; 516 IPSEC_ASSERT(tc != NULL, ("ipcomp_output_cb: null opaque data area!")); 517 m = (struct mbuf *) crp->crp_buf; 518 skip = tc->tc_skip; 519 rlen = crp->crp_ilen - skip; 520 521 s = splsoftnet(); 522 mutex_enter(softnet_lock); 523 524 isr = tc->tc_isr; 525 sav = KEY_ALLOCSA(&tc->tc_dst, tc->tc_proto, tc->tc_spi, 0, 0); 526 if (sav == NULL) { 527 IPCOMP_STATINC(IPCOMP_STAT_NOTDB); 528 DPRINTF(("ipcomp_output_cb: SA expired while in crypto\n")); 529 error = ENOBUFS; /*XXX*/ 530 goto bad; 531 } 532 IPSEC_ASSERT(isr->sav == sav, ("ipcomp_output_cb: SA changed\n")); 533 534 /* Check for crypto errors */ 535 if (crp->crp_etype) { 536 /* Reset session ID */ 537 if (sav->tdb_cryptoid != 0) 538 sav->tdb_cryptoid = crp->crp_sid; 539 540 if (crp->crp_etype == EAGAIN) { 541 KEY_FREESAV(&sav); 542 mutex_exit(softnet_lock); 543 splx(s); 544 return crypto_dispatch(crp); 545 } 546 IPCOMP_STATINC(IPCOMP_STAT_NOXFORM); 547 DPRINTF(("ipcomp_output_cb: crypto error %d\n", crp->crp_etype)); 548 error = crp->crp_etype; 549 goto bad; 550 } 551 /* Shouldn't happen... */ 552 if (m == NULL) { 553 IPCOMP_STATINC(IPCOMP_STAT_CRYPTO); 554 DPRINTF(("ipcomp_output_cb: bogus return buffer from crypto\n")); 555 error = EINVAL; 556 goto bad; 557 } 558 IPCOMP_STATINC(IPCOMP_STAT_HIST + sav->alg_comp); 559 560 if (rlen > crp->crp_olen) { 561 /* Inject IPCOMP header */ 562 mo = m_makespace(m, skip, IPCOMP_HLENGTH, &roff); 563 if (mo == NULL) { 564 IPCOMP_STATINC(IPCOMP_STAT_WRAP); 565 DPRINTF(("ipcomp_output: failed to inject IPCOMP header for " 566 "IPCA %s/%08lx\n", 567 ipsec_address(&sav->sah->saidx.dst), 568 (u_long) ntohl(sav->spi))); 569 error = ENOBUFS; 570 goto bad; 571 } 572 ipcomp = (struct ipcomp *)(mtod(mo, char *) + roff); 573 574 /* Initialize the IPCOMP header */ 575 /* XXX alignment always correct? */ 576 switch (sav->sah->saidx.dst.sa.sa_family) { 577 #ifdef INET 578 case AF_INET: 579 ipcomp->comp_nxt = mtod(m, struct ip *)->ip_p; 580 break; 581 #endif /* INET */ 582 #ifdef INET6 583 case AF_INET6: 584 ipcomp->comp_nxt = mtod(m, struct ip6_hdr *)->ip6_nxt; 585 break; 586 #endif 587 } 588 ipcomp->comp_flags = 0; 589 590 if ((sav->flags & SADB_X_EXT_RAWCPI) == 0) 591 cpi = sav->alg_enc; 592 else 593 cpi = ntohl(sav->spi) & 0xffff; 594 ipcomp->comp_cpi = htons(cpi); 595 596 /* Fix Next Protocol in IPv4/IPv6 header */ 597 prot = IPPROTO_IPCOMP; 598 m_copyback(m, tc->tc_protoff, sizeof(u_int8_t), (u_char *)&prot); 599 600 /* Adjust the length in the IP header */ 601 switch (sav->sah->saidx.dst.sa.sa_family) { 602 #ifdef INET 603 case AF_INET: 604 mtod(m, struct ip *)->ip_len = htons(m->m_pkthdr.len); 605 break; 606 #endif /* INET */ 607 #ifdef INET6 608 case AF_INET6: 609 mtod(m, struct ip6_hdr *)->ip6_plen = 610 htons(m->m_pkthdr.len) - sizeof(struct ip6_hdr); 611 break; 612 #endif /* INET6 */ 613 default: 614 IPCOMP_STATINC(IPCOMP_STAT_NOPF); 615 DPRINTF(("ipcomp_output: unknown/unsupported protocol " 616 "family %d, IPCA %s/%08lx\n", 617 sav->sah->saidx.dst.sa.sa_family, 618 ipsec_address(&sav->sah->saidx.dst), 619 (u_long) ntohl(sav->spi))); 620 error = EPFNOSUPPORT; 621 goto bad; 622 } 623 } else { 624 /* compression was useless, we have lost time */ 625 IPCOMP_STATINC(IPCOMP_STAT_USELESS); 626 DPRINTF(("ipcomp_output_cb: compression was useless : initial size was %d" 627 "and compressed size is %d\n", rlen, crp->crp_olen)); 628 } 629 630 631 /* Release the crypto descriptor */ 632 free(tc, M_XDATA); 633 crypto_freereq(crp); 634 635 /* NB: m is reclaimed by ipsec_process_done. */ 636 error = ipsec_process_done(m, isr); 637 KEY_FREESAV(&sav); 638 mutex_exit(softnet_lock); 639 splx(s); 640 return error; 641 bad: 642 if (sav) 643 KEY_FREESAV(&sav); 644 mutex_exit(softnet_lock); 645 splx(s); 646 if (m) 647 m_freem(m); 648 free(tc, M_XDATA); 649 crypto_freereq(crp); 650 return error; 651 } 652 653 static struct xformsw ipcomp_xformsw = { 654 XF_IPCOMP, XFT_COMP, "IPcomp", 655 ipcomp_init, ipcomp_zeroize, ipcomp_input, 656 ipcomp_output, 657 NULL, 658 }; 659 660 INITFN void 661 ipcomp_attach(void) 662 { 663 ipcompstat_percpu = percpu_alloc(sizeof(uint64_t) * IPCOMP_NSTATS); 664 xform_register(&ipcomp_xformsw); 665 } 666 667 #ifdef __FreeBSD__ 668 SYSINIT(ipcomp_xform_init, SI_SUB_DRIVERS, SI_ORDER_FIRST, ipcomp_attach, NULL) 669 #endif /* __FreeBSD__ */ 670
Indexes created Tue Sep 23 14:10:03 GMT 2025