Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)
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sys/netipsec/xform_ipcomp.c
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1 /* $FreeBSD: releng/10.0/sys/netipsec/xform_ipcomp.c 253088 2013-07-09 10:08:13Z ae $ */ 2 /* $OpenBSD: ip_ipcomp.c,v 1.1 2001/07/05 12:08:52 jjbg Exp $ */ 3 4 /*- 5 * Copyright (c) 2001 Jean-Jacques Bernard-Gundol (jj@wabbitt.org) 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. The name of the author may not be used to endorse or promote products 17 * derived from this software without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 20 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 21 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 22 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 24 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 28 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 /* IP payload compression protocol (IPComp), see RFC 2393 */ 32 #include "opt_inet.h" 33 #include "opt_inet6.h" 34 35 #include <sys/param.h> 36 #include <sys/systm.h> 37 #include <sys/mbuf.h> 38 #include <sys/lock.h> 39 #include <sys/mutex.h> 40 #include <sys/rwlock.h> 41 #include <sys/socket.h> 42 #include <sys/kernel.h> 43 #include <sys/protosw.h> 44 #include <sys/sysctl.h> 45 46 #include <netinet/in.h> 47 #include <netinet/in_systm.h> 48 #include <netinet/ip.h> 49 #include <netinet/ip_var.h> 50 51 #include <net/route.h> 52 #include <net/vnet.h> 53 54 #include <netipsec/ipsec.h> 55 #include <netipsec/xform.h> 56 57 #ifdef INET6 58 #include <netinet/ip6.h> 59 #include <netipsec/ipsec6.h> 60 #endif 61 62 #include <netipsec/ipcomp.h> 63 #include <netipsec/ipcomp_var.h> 64 65 #include <netipsec/key.h> 66 #include <netipsec/key_debug.h> 67 68 #include <opencrypto/cryptodev.h> 69 #include <opencrypto/deflate.h> 70 #include <opencrypto/xform.h> 71 72 VNET_DEFINE(int, ipcomp_enable) = 1; 73 VNET_PCPUSTAT_DEFINE(struct ipcompstat, ipcompstat); 74 VNET_PCPUSTAT_SYSINIT(ipcompstat); 75 76 #ifdef VIMAGE 77 VNET_PCPUSTAT_SYSUNINIT(ipcompstat); 78 #endif /* VIMAGE */ 79 80 SYSCTL_DECL(_net_inet_ipcomp); 81 SYSCTL_VNET_INT(_net_inet_ipcomp, OID_AUTO, 82 ipcomp_enable, CTLFLAG_RW, &VNET_NAME(ipcomp_enable), 0, ""); 83 SYSCTL_VNET_PCPUSTAT(_net_inet_ipcomp, IPSECCTL_STATS, stats, 84 struct ipcompstat, ipcompstat, 85 "IPCOMP statistics (struct ipcompstat, netipsec/ipcomp_var.h"); 86 87 static int ipcomp_input_cb(struct cryptop *crp); 88 static int ipcomp_output_cb(struct cryptop *crp); 89 90 struct comp_algo * 91 ipcomp_algorithm_lookup(int alg) 92 { 93 if (alg >= IPCOMP_ALG_MAX) 94 return NULL; 95 switch (alg) { 96 case SADB_X_CALG_DEFLATE: 97 return &comp_algo_deflate; 98 } 99 return NULL; 100 } 101 102 /* 103 * ipcomp_init() is called when an CPI is being set up. 104 */ 105 static int 106 ipcomp_init(struct secasvar *sav, struct xformsw *xsp) 107 { 108 struct comp_algo *tcomp; 109 struct cryptoini cric; 110 111 /* NB: algorithm really comes in alg_enc and not alg_comp! */ 112 tcomp = ipcomp_algorithm_lookup(sav->alg_enc); 113 if (tcomp == NULL) { 114 DPRINTF(("%s: unsupported compression algorithm %d\n", __func__, 115 sav->alg_comp)); 116 return EINVAL; 117 } 118 sav->alg_comp = sav->alg_enc; /* set for doing histogram */ 119 sav->tdb_xform = xsp; 120 sav->tdb_compalgxform = tcomp; 121 122 /* Initialize crypto session */ 123 bzero(&cric, sizeof (cric)); 124 cric.cri_alg = sav->tdb_compalgxform->type; 125 126 return crypto_newsession(&sav->tdb_cryptoid, &cric, V_crypto_support); 127 } 128 129 /* 130 * ipcomp_zeroize() used when IPCA is deleted 131 */ 132 static int 133 ipcomp_zeroize(struct secasvar *sav) 134 { 135 int err; 136 137 err = crypto_freesession(sav->tdb_cryptoid); 138 sav->tdb_cryptoid = 0; 139 return err; 140 } 141 142 /* 143 * ipcomp_input() gets called to uncompress an input packet 144 */ 145 static int 146 ipcomp_input(struct mbuf *m, struct secasvar *sav, int skip, int protoff) 147 { 148 struct tdb_crypto *tc; 149 struct cryptodesc *crdc; 150 struct cryptop *crp; 151 struct ipcomp *ipcomp; 152 caddr_t addr; 153 int hlen = IPCOMP_HLENGTH; 154 155 /* 156 * Check that the next header of the IPComp is not IPComp again, before 157 * doing any real work. Given it is not possible to do double 158 * compression it means someone is playing tricks on us. 159 */ 160 if (m->m_len < skip + hlen && (m = m_pullup(m, skip + hlen)) == NULL) { 161 IPCOMPSTAT_INC(ipcomps_hdrops); /*XXX*/ 162 DPRINTF(("%s: m_pullup failed\n", __func__)); 163 return (ENOBUFS); 164 } 165 addr = (caddr_t) mtod(m, struct ip *) + skip; 166 ipcomp = (struct ipcomp *)addr; 167 if (ipcomp->comp_nxt == IPPROTO_IPCOMP) { 168 m_freem(m); 169 IPCOMPSTAT_INC(ipcomps_pdrops); /* XXX have our own stats? */ 170 DPRINTF(("%s: recursive compression detected\n", __func__)); 171 return (EINVAL); 172 } 173 174 /* Get crypto descriptors */ 175 crp = crypto_getreq(1); 176 if (crp == NULL) { 177 m_freem(m); 178 DPRINTF(("%s: no crypto descriptors\n", __func__)); 179 IPCOMPSTAT_INC(ipcomps_crypto); 180 return ENOBUFS; 181 } 182 /* Get IPsec-specific opaque pointer */ 183 tc = (struct tdb_crypto *) malloc(sizeof (*tc), M_XDATA, M_NOWAIT|M_ZERO); 184 if (tc == NULL) { 185 m_freem(m); 186 crypto_freereq(crp); 187 DPRINTF(("%s: cannot allocate tdb_crypto\n", __func__)); 188 IPCOMPSTAT_INC(ipcomps_crypto); 189 return ENOBUFS; 190 } 191 crdc = crp->crp_desc; 192 193 crdc->crd_skip = skip + hlen; 194 crdc->crd_len = m->m_pkthdr.len - (skip + hlen); 195 crdc->crd_inject = skip; 196 197 tc->tc_ptr = 0; 198 199 /* Decompression operation */ 200 crdc->crd_alg = sav->tdb_compalgxform->type; 201 202 /* Crypto operation descriptor */ 203 crp->crp_ilen = m->m_pkthdr.len - (skip + hlen); 204 crp->crp_flags = CRYPTO_F_IMBUF | CRYPTO_F_CBIFSYNC; 205 crp->crp_buf = (caddr_t) m; 206 crp->crp_callback = ipcomp_input_cb; 207 crp->crp_sid = sav->tdb_cryptoid; 208 crp->crp_opaque = (caddr_t) tc; 209 210 /* These are passed as-is to the callback */ 211 tc->tc_spi = sav->spi; 212 tc->tc_dst = sav->sah->saidx.dst; 213 tc->tc_proto = sav->sah->saidx.proto; 214 tc->tc_protoff = protoff; 215 tc->tc_skip = skip; 216 KEY_ADDREFSA(sav); 217 tc->tc_sav = sav; 218 219 return crypto_dispatch(crp); 220 } 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 hlen = IPCOMP_HLENGTH, error, clen; 236 u_int8_t nproto; 237 caddr_t addr; 238 239 crd = crp->crp_desc; 240 241 tc = (struct tdb_crypto *) crp->crp_opaque; 242 IPSEC_ASSERT(tc != NULL, ("null opaque crypto data area!")); 243 skip = tc->tc_skip; 244 protoff = tc->tc_protoff; 245 mtag = (struct mtag *) tc->tc_ptr; 246 m = (struct mbuf *) crp->crp_buf; 247 248 sav = tc->tc_sav; 249 IPSEC_ASSERT(sav != NULL, ("null SA!")); 250 251 saidx = &sav->sah->saidx; 252 IPSEC_ASSERT(saidx->dst.sa.sa_family == AF_INET || 253 saidx->dst.sa.sa_family == AF_INET6, 254 ("unexpected protocol family %u", saidx->dst.sa.sa_family)); 255 256 /* Check for crypto errors */ 257 if (crp->crp_etype) { 258 /* Reset the session ID */ 259 if (sav->tdb_cryptoid != 0) 260 sav->tdb_cryptoid = crp->crp_sid; 261 262 if (crp->crp_etype == EAGAIN) { 263 return crypto_dispatch(crp); 264 } 265 IPCOMPSTAT_INC(ipcomps_noxform); 266 DPRINTF(("%s: crypto error %d\n", __func__, crp->crp_etype)); 267 error = crp->crp_etype; 268 goto bad; 269 } 270 /* Shouldn't happen... */ 271 if (m == NULL) { 272 IPCOMPSTAT_INC(ipcomps_crypto); 273 DPRINTF(("%s: null mbuf returned from crypto\n", __func__)); 274 error = EINVAL; 275 goto bad; 276 } 277 IPCOMPSTAT_INC(ipcomps_hist[sav->alg_comp]); 278 279 clen = crp->crp_olen; /* Length of data after processing */ 280 281 /* Release the crypto descriptors */ 282 free(tc, M_XDATA), tc = NULL; 283 crypto_freereq(crp), crp = NULL; 284 285 /* In case it's not done already, adjust the size of the mbuf chain */ 286 m->m_pkthdr.len = clen + hlen + skip; 287 288 if (m->m_len < skip + hlen && (m = m_pullup(m, skip + hlen)) == 0) { 289 IPCOMPSTAT_INC(ipcomps_hdrops); /*XXX*/ 290 DPRINTF(("%s: m_pullup failed\n", __func__)); 291 error = EINVAL; /*XXX*/ 292 goto bad; 293 } 294 295 /* Keep the next protocol field */ 296 addr = (caddr_t) mtod(m, struct ip *) + skip; 297 nproto = ((struct ipcomp *) addr)->comp_nxt; 298 299 /* Remove the IPCOMP header */ 300 error = m_striphdr(m, skip, hlen); 301 if (error) { 302 IPCOMPSTAT_INC(ipcomps_hdrops); 303 DPRINTF(("%s: bad mbuf chain, IPCA %s/%08lx\n", __func__, 304 ipsec_address(&sav->sah->saidx.dst), 305 (u_long) ntohl(sav->spi))); 306 goto bad; 307 } 308 309 /* Restore the Next Protocol field */ 310 m_copyback(m, protoff, sizeof (u_int8_t), (u_int8_t *) &nproto); 311 312 switch (saidx->dst.sa.sa_family) { 313 #ifdef INET6 314 case AF_INET6: 315 error = ipsec6_common_input_cb(m, sav, skip, protoff, NULL); 316 break; 317 #endif 318 #ifdef INET 319 case AF_INET: 320 error = ipsec4_common_input_cb(m, sav, skip, protoff, NULL); 321 break; 322 #endif 323 default: 324 panic("%s: Unexpected address family: %d saidx=%p", __func__, 325 saidx->dst.sa.sa_family, saidx); 326 } 327 328 KEY_FREESAV(&sav); 329 return error; 330 bad: 331 if (sav) 332 KEY_FREESAV(&sav); 333 if (m) 334 m_freem(m); 335 if (tc != NULL) 336 free(tc, M_XDATA); 337 if (crp) 338 crypto_freereq(crp); 339 return error; 340 } 341 342 /* 343 * IPComp output routine, called by ipsec[46]_process_packet() 344 */ 345 static int 346 ipcomp_output( 347 struct mbuf *m, 348 struct ipsecrequest *isr, 349 struct mbuf **mp, 350 int skip, 351 int protoff 352 ) 353 { 354 struct secasvar *sav; 355 struct comp_algo *ipcompx; 356 int error, ralen, maxpacketsize; 357 struct cryptodesc *crdc; 358 struct cryptop *crp; 359 struct tdb_crypto *tc; 360 361 sav = isr->sav; 362 IPSEC_ASSERT(sav != NULL, ("null SA")); 363 ipcompx = sav->tdb_compalgxform; 364 IPSEC_ASSERT(ipcompx != NULL, ("null compression xform")); 365 366 /* 367 * Do not touch the packet in case our payload to compress 368 * is lower than the minimal threshold of the compression 369 * alogrithm. We will just send out the data uncompressed. 370 * See RFC 3173, 2.2. Non-Expansion Policy. 371 */ 372 if (m->m_pkthdr.len <= ipcompx->minlen) { 373 IPCOMPSTAT_INC(ipcomps_threshold); 374 return ipsec_process_done(m, isr); 375 } 376 377 ralen = m->m_pkthdr.len - skip; /* Raw payload length before comp. */ 378 IPCOMPSTAT_INC(ipcomps_output); 379 380 /* Check for maximum packet size violations. */ 381 switch (sav->sah->saidx.dst.sa.sa_family) { 382 #ifdef INET 383 case AF_INET: 384 maxpacketsize = IP_MAXPACKET; 385 break; 386 #endif /* INET */ 387 #ifdef INET6 388 case AF_INET6: 389 maxpacketsize = IPV6_MAXPACKET; 390 break; 391 #endif /* INET6 */ 392 default: 393 IPCOMPSTAT_INC(ipcomps_nopf); 394 DPRINTF(("%s: unknown/unsupported protocol family %d, " 395 "IPCA %s/%08lx\n", __func__, 396 sav->sah->saidx.dst.sa.sa_family, 397 ipsec_address(&sav->sah->saidx.dst), 398 (u_long) ntohl(sav->spi))); 399 error = EPFNOSUPPORT; 400 goto bad; 401 } 402 if (ralen + skip + IPCOMP_HLENGTH > maxpacketsize) { 403 IPCOMPSTAT_INC(ipcomps_toobig); 404 DPRINTF(("%s: packet in IPCA %s/%08lx got too big " 405 "(len %u, max len %u)\n", __func__, 406 ipsec_address(&sav->sah->saidx.dst), 407 (u_long) ntohl(sav->spi), 408 ralen + skip + IPCOMP_HLENGTH, maxpacketsize)); 409 error = EMSGSIZE; 410 goto bad; 411 } 412 413 /* Update the counters */ 414 IPCOMPSTAT_ADD(ipcomps_obytes, m->m_pkthdr.len - skip); 415 416 m = m_unshare(m, M_NOWAIT); 417 if (m == NULL) { 418 IPCOMPSTAT_INC(ipcomps_hdrops); 419 DPRINTF(("%s: cannot clone mbuf chain, IPCA %s/%08lx\n", 420 __func__, ipsec_address(&sav->sah->saidx.dst), 421 (u_long) ntohl(sav->spi))); 422 error = ENOBUFS; 423 goto bad; 424 } 425 426 /* Ok now, we can pass to the crypto processing. */ 427 428 /* Get crypto descriptors */ 429 crp = crypto_getreq(1); 430 if (crp == NULL) { 431 IPCOMPSTAT_INC(ipcomps_crypto); 432 DPRINTF(("%s: failed to acquire crypto descriptor\n",__func__)); 433 error = ENOBUFS; 434 goto bad; 435 } 436 crdc = crp->crp_desc; 437 438 /* Compression descriptor */ 439 crdc->crd_skip = skip; 440 crdc->crd_len = ralen; 441 crdc->crd_flags = CRD_F_COMP; 442 crdc->crd_inject = skip; 443 444 /* Compression operation */ 445 crdc->crd_alg = ipcompx->type; 446 447 /* IPsec-specific opaque crypto info */ 448 tc = (struct tdb_crypto *) malloc(sizeof(struct tdb_crypto), 449 M_XDATA, M_NOWAIT|M_ZERO); 450 if (tc == NULL) { 451 IPCOMPSTAT_INC(ipcomps_crypto); 452 DPRINTF(("%s: failed to allocate tdb_crypto\n", __func__)); 453 crypto_freereq(crp); 454 error = ENOBUFS; 455 goto bad; 456 } 457 458 tc->tc_isr = isr; 459 KEY_ADDREFSA(sav); 460 tc->tc_sav = sav; 461 tc->tc_spi = sav->spi; 462 tc->tc_dst = sav->sah->saidx.dst; 463 tc->tc_proto = sav->sah->saidx.proto; 464 tc->tc_protoff = protoff; 465 tc->tc_skip = skip; 466 467 /* Crypto operation descriptor */ 468 crp->crp_ilen = m->m_pkthdr.len; /* Total input length */ 469 crp->crp_flags = CRYPTO_F_IMBUF | CRYPTO_F_CBIFSYNC; 470 crp->crp_buf = (caddr_t) m; 471 crp->crp_callback = ipcomp_output_cb; 472 crp->crp_opaque = (caddr_t) tc; 473 crp->crp_sid = sav->tdb_cryptoid; 474 475 return crypto_dispatch(crp); 476 bad: 477 if (m) 478 m_freem(m); 479 return (error); 480 } 481 482 /* 483 * IPComp output callback from the crypto driver. 484 */ 485 static int 486 ipcomp_output_cb(struct cryptop *crp) 487 { 488 struct tdb_crypto *tc; 489 struct ipsecrequest *isr; 490 struct secasvar *sav; 491 struct mbuf *m; 492 int error, skip; 493 494 tc = (struct tdb_crypto *) crp->crp_opaque; 495 IPSEC_ASSERT(tc != NULL, ("null opaque data area!")); 496 m = (struct mbuf *) crp->crp_buf; 497 skip = tc->tc_skip; 498 499 isr = tc->tc_isr; 500 IPSECREQUEST_LOCK(isr); 501 sav = tc->tc_sav; 502 /* With the isr lock released SA pointer can be updated. */ 503 if (sav != isr->sav) { 504 IPCOMPSTAT_INC(ipcomps_notdb); 505 DPRINTF(("%s: SA expired while in crypto\n", __func__)); 506 error = ENOBUFS; /*XXX*/ 507 goto bad; 508 } 509 510 /* Check for crypto errors */ 511 if (crp->crp_etype) { 512 /* Reset the session ID */ 513 if (sav->tdb_cryptoid != 0) 514 sav->tdb_cryptoid = crp->crp_sid; 515 516 if (crp->crp_etype == EAGAIN) { 517 IPSECREQUEST_UNLOCK(isr); 518 return crypto_dispatch(crp); 519 } 520 IPCOMPSTAT_INC(ipcomps_noxform); 521 DPRINTF(("%s: crypto error %d\n", __func__, crp->crp_etype)); 522 error = crp->crp_etype; 523 goto bad; 524 } 525 /* Shouldn't happen... */ 526 if (m == NULL) { 527 IPCOMPSTAT_INC(ipcomps_crypto); 528 DPRINTF(("%s: bogus return buffer from crypto\n", __func__)); 529 error = EINVAL; 530 goto bad; 531 } 532 IPCOMPSTAT_INC(ipcomps_hist[sav->alg_comp]); 533 534 if (crp->crp_ilen - skip > crp->crp_olen) { 535 struct mbuf *mo; 536 struct ipcomp *ipcomp; 537 int roff; 538 uint8_t prot; 539 540 /* Compression helped, inject IPCOMP header. */ 541 mo = m_makespace(m, skip, IPCOMP_HLENGTH, &roff); 542 if (mo == NULL) { 543 IPCOMPSTAT_INC(ipcomps_wrap); 544 DPRINTF(("%s: IPCOMP header inject failed for IPCA %s/%08lx\n", 545 __func__, ipsec_address(&sav->sah->saidx.dst), 546 (u_long) ntohl(sav->spi))); 547 error = ENOBUFS; 548 goto bad; 549 } 550 ipcomp = (struct ipcomp *)(mtod(mo, caddr_t) + roff); 551 552 /* Initialize the IPCOMP header */ 553 /* XXX alignment always correct? */ 554 switch (sav->sah->saidx.dst.sa.sa_family) { 555 #ifdef INET 556 case AF_INET: 557 ipcomp->comp_nxt = mtod(m, struct ip *)->ip_p; 558 break; 559 #endif /* INET */ 560 #ifdef INET6 561 case AF_INET6: 562 ipcomp->comp_nxt = mtod(m, struct ip6_hdr *)->ip6_nxt; 563 break; 564 #endif 565 } 566 ipcomp->comp_flags = 0; 567 ipcomp->comp_cpi = htons((u_int16_t) ntohl(sav->spi)); 568 569 /* Fix Next Protocol in IPv4/IPv6 header */ 570 prot = IPPROTO_IPCOMP; 571 m_copyback(m, tc->tc_protoff, sizeof(u_int8_t), 572 (u_char *)&prot); 573 574 /* Adjust the length in the IP header */ 575 switch (sav->sah->saidx.dst.sa.sa_family) { 576 #ifdef INET 577 case AF_INET: 578 mtod(m, struct ip *)->ip_len = htons(m->m_pkthdr.len); 579 break; 580 #endif /* INET */ 581 #ifdef INET6 582 case AF_INET6: 583 mtod(m, struct ip6_hdr *)->ip6_plen = 584 htons(m->m_pkthdr.len) - sizeof(struct ip6_hdr); 585 break; 586 #endif /* INET6 */ 587 default: 588 IPCOMPSTAT_INC(ipcomps_nopf); 589 DPRINTF(("%s: unknown/unsupported protocol " 590 "family %d, IPCA %s/%08lx\n", __func__, 591 sav->sah->saidx.dst.sa.sa_family, 592 ipsec_address(&sav->sah->saidx.dst), 593 (u_long) ntohl(sav->spi))); 594 error = EPFNOSUPPORT; 595 goto bad; 596 } 597 } else { 598 /* Compression was useless, we have lost time. */ 599 IPCOMPSTAT_INC(ipcomps_uncompr); 600 DPRINTF(("%s: compressions was useless %d - %d <= %d\n", 601 __func__, crp->crp_ilen, skip, crp->crp_olen)); 602 /* XXX remember state to not compress the next couple 603 * of packets, RFC 3173, 2.2. Non-Expansion Policy */ 604 } 605 606 /* Release the crypto descriptor */ 607 free(tc, M_XDATA); 608 crypto_freereq(crp); 609 610 /* NB: m is reclaimed by ipsec_process_done. */ 611 error = ipsec_process_done(m, isr); 612 KEY_FREESAV(&sav); 613 IPSECREQUEST_UNLOCK(isr); 614 return error; 615 bad: 616 if (sav) 617 KEY_FREESAV(&sav); 618 IPSECREQUEST_UNLOCK(isr); 619 if (m) 620 m_freem(m); 621 free(tc, M_XDATA); 622 crypto_freereq(crp); 623 return error; 624 } 625 626 static struct xformsw ipcomp_xformsw = { 627 XF_IPCOMP, XFT_COMP, "IPcomp", 628 ipcomp_init, ipcomp_zeroize, ipcomp_input, 629 ipcomp_output 630 }; 631 632 static void 633 ipcomp_attach(void) 634 { 635 636 xform_register(&ipcomp_xformsw); 637 } 638 639 SYSINIT(ipcomp_xform_init, SI_SUB_PROTO_DOMAIN, SI_ORDER_MIDDLE, ipcomp_attach, NULL);
Cache object: d3212b633902f8c1b2869dbc8329ed1a
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