1 /* $NetBSD: xform_ipcomp.c,v 1.17 2008/02/04 00:35:35 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@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 1.17 2008/02/04 00:35:35 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 49 #include <netinet/in.h> 50 #include <netinet/in_systm.h> 51 #include <netinet/ip.h> 52 #include <netinet/ip_var.h> 53 54 #include <net/route.h> 55 #include <netipsec/ipsec.h> 56 #include <netipsec/xform.h> 57 58 #ifdef INET6 59 #include <netinet/ip6.h> 60 #include <netipsec/ipsec6.h> 61 #endif 62 63 #include <netipsec/ipcomp.h> 64 #include <netipsec/ipcomp_var.h> 65 66 #include <netipsec/key.h> 67 #include <netipsec/key_debug.h> 68 69 #include <netipsec/ipsec_osdep.h> 70 71 #include <opencrypto/cryptodev.h> 72 #include <opencrypto/deflate.h> 73 #include <opencrypto/xform.h> 74 75 int ipcomp_enable = 1; 76 struct ipcompstat ipcompstat; 77 78 #ifdef __FreeBSD__ 79 SYSCTL_DECL(_net_inet_ipcomp); 80 SYSCTL_INT(_net_inet_ipcomp, OID_AUTO, 81 ipcomp_enable, CTLFLAG_RW, &ipcomp_enable, 0, ""); 82 SYSCTL_STRUCT(_net_inet_ipcomp, IPSECCTL_STATS, 83 stats, CTLFLAG_RD, &ipcompstat, ipcompstat, ""); 84 #endif /* __FreeBSD__ */ 85 86 static int ipcomp_input_cb(struct cryptop *crp); 87 static int ipcomp_output_cb(struct cryptop *crp); 88 89 struct comp_algo * 90 ipcomp_algorithm_lookup(int alg) 91 { 92 if (alg >= IPCOMP_ALG_MAX) 93 return NULL; 94 switch (alg) { 95 case SADB_X_CALG_DEFLATE: 96 return &comp_algo_deflate; 97 } 98 return NULL; 99 } 100 101 /* 102 * ipcomp_init() is called when an CPI is being set up. 103 */ 104 static int 105 ipcomp_init(struct secasvar *sav, struct xformsw *xsp) 106 { 107 struct comp_algo *tcomp; 108 struct cryptoini cric; 109 int ses; 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(("ipcomp_init: unsupported compression algorithm %d\n", 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 mutex_spin_enter(&crypto_mtx); 127 ses = crypto_newsession(&sav->tdb_cryptoid, &cric, crypto_support); 128 mutex_spin_exit(&crypto_mtx); 129 return ses; 130 } 131 132 /* 133 * ipcomp_zeroize() used when IPCA is deleted 134 */ 135 static int 136 ipcomp_zeroize(struct secasvar *sav) 137 { 138 int err; 139 140 mutex_spin_enter(&crypto_mtx); 141 err = crypto_freesession(sav->tdb_cryptoid); 142 mutex_spin_exit(&crypto_mtx); 143 sav->tdb_cryptoid = 0; 144 return err; 145 } 146 147 /* 148 * ipcomp_input() gets called to uncompress an input packet 149 */ 150 static int 151 ipcomp_input(struct mbuf *m, struct secasvar *sav, int skip, int protoff) 152 { 153 struct tdb_crypto *tc; 154 struct cryptodesc *crdc; 155 struct cryptop *crp; 156 int hlen = IPCOMP_HLENGTH; 157 158 IPSEC_SPLASSERT_SOFTNET("ipcomp_input"); 159 160 /* Get crypto descriptors */ 161 crp = crypto_getreq(1); 162 if (crp == NULL) { 163 m_freem(m); 164 DPRINTF(("ipcomp_input: no crypto descriptors\n")); 165 ipcompstat.ipcomps_crypto++; 166 return ENOBUFS; 167 } 168 /* Get IPsec-specific opaque pointer */ 169 tc = (struct tdb_crypto *) malloc(sizeof (*tc), M_XDATA, M_NOWAIT|M_ZERO); 170 if (tc == NULL) { 171 m_freem(m); 172 crypto_freereq(crp); 173 DPRINTF(("ipcomp_input: cannot allocate tdb_crypto\n")); 174 ipcompstat.ipcomps_crypto++; 175 return ENOBUFS; 176 } 177 crdc = crp->crp_desc; 178 179 crdc->crd_skip = skip + hlen; 180 crdc->crd_len = m->m_pkthdr.len - (skip + hlen); 181 crdc->crd_inject = skip; 182 183 tc->tc_ptr = 0; 184 185 /* Decompression operation */ 186 crdc->crd_alg = sav->tdb_compalgxform->type; 187 188 /* Crypto operation descriptor */ 189 crp->crp_ilen = m->m_pkthdr.len - (skip + hlen); 190 crp->crp_flags = CRYPTO_F_IMBUF; 191 crp->crp_buf = m; 192 crp->crp_callback = ipcomp_input_cb; 193 crp->crp_sid = sav->tdb_cryptoid; 194 crp->crp_opaque = tc; 195 196 /* These are passed as-is to the callback */ 197 tc->tc_spi = sav->spi; 198 tc->tc_dst = sav->sah->saidx.dst; 199 tc->tc_proto = sav->sah->saidx.proto; 200 tc->tc_protoff = protoff; 201 tc->tc_skip = skip; 202 203 return crypto_dispatch(crp); 204 } 205 206 #ifdef INET6 207 #define IPSEC_COMMON_INPUT_CB(m, sav, skip, protoff, mtag) do { \ 208 if (saidx->dst.sa.sa_family == AF_INET6) { \ 209 error = ipsec6_common_input_cb(m, sav, skip, protoff, mtag); \ 210 } else { \ 211 error = ipsec4_common_input_cb(m, sav, skip, protoff, mtag); \ 212 } \ 213 } while (0) 214 #else 215 #define IPSEC_COMMON_INPUT_CB(m, sav, skip, protoff, mtag) \ 216 (error = ipsec4_common_input_cb(m, sav, skip, protoff, mtag)) 217 #endif 218 219 /* 220 * IPComp input callback from the crypto driver. 221 */ 222 static int 223 ipcomp_input_cb(struct cryptop *crp) 224 { 225 struct cryptodesc *crd; 226 struct tdb_crypto *tc; 227 int skip, protoff; 228 struct mtag *mtag; 229 struct mbuf *m; 230 struct secasvar *sav; 231 struct secasindex *saidx; 232 int s, hlen = IPCOMP_HLENGTH, error, clen; 233 u_int8_t nproto; 234 void *addr; 235 u_int16_t dport = 0; 236 u_int16_t sport = 0; 237 #ifdef IPSEC_NAT_T 238 struct m_tag * tag = NULL; 239 #endif 240 241 crd = crp->crp_desc; 242 243 tc = (struct tdb_crypto *) crp->crp_opaque; 244 IPSEC_ASSERT(tc != NULL, ("ipcomp_input_cb: null opaque crypto data area!")); 245 skip = tc->tc_skip; 246 protoff = tc->tc_protoff; 247 mtag = (struct mtag *) tc->tc_ptr; 248 m = (struct mbuf *) crp->crp_buf; 249 250 #ifdef IPSEC_NAT_T 251 /* find the source port for NAT-T */ 252 if ((tag = m_tag_find(m, PACKET_TAG_IPSEC_NAT_T_PORTS, NULL))) { 253 sport = ((u_int16_t *)(tag + 1))[0]; 254 dport = ((u_int16_t *)(tag + 1))[1]; 255 } 256 #endif 257 258 s = splsoftnet(); 259 260 sav = KEY_ALLOCSA(&tc->tc_dst, tc->tc_proto, tc->tc_spi, sport, dport); 261 if (sav == NULL) { 262 ipcompstat.ipcomps_notdb++; 263 DPRINTF(("ipcomp_input_cb: SA expired while in crypto\n")); 264 error = ENOBUFS; /*XXX*/ 265 goto bad; 266 } 267 268 saidx = &sav->sah->saidx; 269 IPSEC_ASSERT(saidx->dst.sa.sa_family == AF_INET || 270 saidx->dst.sa.sa_family == AF_INET6, 271 ("ah_input_cb: unexpected protocol family %u", 272 saidx->dst.sa.sa_family)); 273 274 /* Check for crypto errors */ 275 if (crp->crp_etype) { 276 /* Reset the session ID */ 277 if (sav->tdb_cryptoid != 0) 278 sav->tdb_cryptoid = crp->crp_sid; 279 280 if (crp->crp_etype == EAGAIN) { 281 KEY_FREESAV(&sav); 282 splx(s); 283 return crypto_dispatch(crp); 284 } 285 286 ipcompstat.ipcomps_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 ipcompstat.ipcomps_crypto++; 294 DPRINTF(("ipcomp_input_cb: null mbuf returned from crypto\n")); 295 error = EINVAL; 296 goto bad; 297 } 298 ipcompstat.ipcomps_hist[sav->alg_comp]++; 299 300 clen = crp->crp_olen; /* Length of data after processing */ 301 302 /* Release the crypto descriptors */ 303 free(tc, M_XDATA), tc = NULL; 304 crypto_freereq(crp), crp = NULL; 305 306 /* In case it's not done already, adjust the size of the mbuf chain */ 307 m->m_pkthdr.len = clen + hlen + skip; 308 309 if (m->m_len < skip + hlen && (m = m_pullup(m, skip + hlen)) == 0) { 310 ipcompstat.ipcomps_hdrops++; /*XXX*/ 311 DPRINTF(("ipcomp_input_cb: m_pullup failed\n")); 312 error = EINVAL; /*XXX*/ 313 goto bad; 314 } 315 316 /* Keep the next protocol field */ 317 addr = (uint8_t*) mtod(m, struct ip *) + skip; 318 nproto = ((struct ipcomp *) addr)->comp_nxt; 319 320 /* Remove the IPCOMP header */ 321 error = m_striphdr(m, skip, hlen); 322 if (error) { 323 ipcompstat.ipcomps_hdrops++; 324 DPRINTF(("ipcomp_input_cb: bad mbuf chain, IPCA %s/%08lx\n", 325 ipsec_address(&sav->sah->saidx.dst), 326 (u_long) ntohl(sav->spi))); 327 goto bad; 328 } 329 330 /* Restore the Next Protocol field */ 331 m_copyback(m, protoff, sizeof (u_int8_t), (u_int8_t *) &nproto); 332 333 IPSEC_COMMON_INPUT_CB(m, sav, skip, protoff, NULL); 334 335 KEY_FREESAV(&sav); 336 splx(s); 337 return error; 338 bad: 339 if (sav) 340 KEY_FREESAV(&sav); 341 splx(s); 342 if (m) 343 m_freem(m); 344 if (tc != NULL) 345 free(tc, M_XDATA); 346 if (crp) 347 crypto_freereq(crp); 348 return error; 349 } 350 351 /* 352 * IPComp output routine, called by ipsec[46]_process_packet() 353 */ 354 static int 355 ipcomp_output( 356 struct mbuf *m, 357 struct ipsecrequest *isr, 358 struct mbuf **mp, 359 int skip, 360 int protoff 361 ) 362 { 363 struct secasvar *sav; 364 struct comp_algo *ipcompx; 365 int error, ralen, hlen, maxpacketsize; 366 struct cryptodesc *crdc; 367 struct cryptop *crp; 368 struct tdb_crypto *tc; 369 370 IPSEC_SPLASSERT_SOFTNET("ipcomp_output"); 371 sav = isr->sav; 372 IPSEC_ASSERT(sav != NULL, ("ipcomp_output: null SA")); 373 ipcompx = sav->tdb_compalgxform; 374 IPSEC_ASSERT(ipcompx != NULL, ("ipcomp_output: null compression xform")); 375 376 ralen = m->m_pkthdr.len - skip; /* Raw payload length before comp. */ 377 378 /* Don't process the packet if it is too short */ 379 if (ralen < ipcompx->minlen) { 380 ipcompstat.ipcomps_minlen++; 381 return ipsec_process_done(m,isr); 382 } 383 384 hlen = IPCOMP_HLENGTH; 385 386 ipcompstat.ipcomps_output++; 387 388 /* Check for maximum packet size violations. */ 389 switch (sav->sah->saidx.dst.sa.sa_family) { 390 #ifdef INET 391 case AF_INET: 392 maxpacketsize = IP_MAXPACKET; 393 break; 394 #endif /* INET */ 395 #ifdef INET6 396 case AF_INET6: 397 maxpacketsize = IPV6_MAXPACKET; 398 break; 399 #endif /* INET6 */ 400 default: 401 ipcompstat.ipcomps_nopf++; 402 DPRINTF(("ipcomp_output: unknown/unsupported protocol family %d" 403 ", IPCA %s/%08lx\n", 404 sav->sah->saidx.dst.sa.sa_family, 405 ipsec_address(&sav->sah->saidx.dst), 406 (u_long) ntohl(sav->spi))); 407 error = EPFNOSUPPORT; 408 goto bad; 409 } 410 if (skip + hlen + ralen > maxpacketsize) { 411 ipcompstat.ipcomps_toobig++; 412 DPRINTF(("ipcomp_output: packet in IPCA %s/%08lx got too big " 413 "(len %u, max len %u)\n", 414 ipsec_address(&sav->sah->saidx.dst), 415 (u_long) ntohl(sav->spi), 416 skip + hlen + ralen, maxpacketsize)); 417 error = EMSGSIZE; 418 goto bad; 419 } 420 421 /* Update the counters */ 422 ipcompstat.ipcomps_obytes += m->m_pkthdr.len - skip; 423 424 m = m_clone(m); 425 if (m == NULL) { 426 ipcompstat.ipcomps_hdrops++; 427 DPRINTF(("ipcomp_output: cannot clone mbuf chain, IPCA %s/%08lx\n", 428 ipsec_address(&sav->sah->saidx.dst), 429 (u_long) ntohl(sav->spi))); 430 error = ENOBUFS; 431 goto bad; 432 } 433 434 /* Ok now, we can pass to the crypto processing */ 435 436 /* Get crypto descriptors */ 437 crp = crypto_getreq(1); 438 if (crp == NULL) { 439 ipcompstat.ipcomps_crypto++; 440 DPRINTF(("ipcomp_output: failed to acquire crypto descriptor\n")); 441 error = ENOBUFS; 442 goto bad; 443 } 444 crdc = crp->crp_desc; 445 446 /* Compression descriptor */ 447 crdc->crd_skip = skip; 448 crdc->crd_len = m->m_pkthdr.len - skip; 449 crdc->crd_flags = CRD_F_COMP; 450 crdc->crd_inject = skip; 451 452 /* Compression operation */ 453 crdc->crd_alg = ipcompx->type; 454 455 /* IPsec-specific opaque crypto info */ 456 tc = (struct tdb_crypto *) malloc(sizeof(struct tdb_crypto), 457 M_XDATA, M_NOWAIT|M_ZERO); 458 if (tc == NULL) { 459 ipcompstat.ipcomps_crypto++; 460 DPRINTF(("ipcomp_output: failed to allocate tdb_crypto\n")); 461 crypto_freereq(crp); 462 error = ENOBUFS; 463 goto bad; 464 } 465 466 tc->tc_isr = isr; 467 tc->tc_spi = sav->spi; 468 tc->tc_dst = sav->sah->saidx.dst; 469 tc->tc_proto = sav->sah->saidx.proto; 470 tc->tc_skip = skip; 471 tc->tc_protoff = protoff; 472 473 /* Crypto operation descriptor */ 474 crp->crp_ilen = m->m_pkthdr.len; /* Total input length */ 475 crp->crp_flags = CRYPTO_F_IMBUF; 476 crp->crp_buf = m; 477 crp->crp_callback = ipcomp_output_cb; 478 crp->crp_opaque = tc; 479 crp->crp_sid = sav->tdb_cryptoid; 480 481 return crypto_dispatch(crp); 482 bad: 483 if (m) 484 m_freem(m); 485 return (error); 486 } 487 488 /* 489 * IPComp output callback from the crypto driver. 490 */ 491 static int 492 ipcomp_output_cb(struct cryptop *crp) 493 { 494 struct tdb_crypto *tc; 495 struct ipsecrequest *isr; 496 struct secasvar *sav; 497 struct mbuf *m, *mo; 498 int s, error, skip, rlen, roff; 499 u_int8_t prot; 500 u_int16_t cpi; 501 struct ipcomp * ipcomp; 502 503 504 tc = (struct tdb_crypto *) crp->crp_opaque; 505 IPSEC_ASSERT(tc != NULL, ("ipcomp_output_cb: null opaque data area!")); 506 m = (struct mbuf *) crp->crp_buf; 507 skip = tc->tc_skip; 508 rlen = crp->crp_ilen - skip; 509 510 s = splsoftnet(); 511 512 isr = tc->tc_isr; 513 sav = KEY_ALLOCSA(&tc->tc_dst, tc->tc_proto, tc->tc_spi, 0, 0); 514 if (sav == NULL) { 515 ipcompstat.ipcomps_notdb++; 516 DPRINTF(("ipcomp_output_cb: SA expired while in crypto\n")); 517 error = ENOBUFS; /*XXX*/ 518 goto bad; 519 } 520 IPSEC_ASSERT(isr->sav == sav, ("ipcomp_output_cb: SA changed\n")); 521 522 /* Check for crypto errors */ 523 if (crp->crp_etype) { 524 /* Reset session ID */ 525 if (sav->tdb_cryptoid != 0) 526 sav->tdb_cryptoid = crp->crp_sid; 527 528 if (crp->crp_etype == EAGAIN) { 529 KEY_FREESAV(&sav); 530 splx(s); 531 return crypto_dispatch(crp); 532 } 533 ipcompstat.ipcomps_noxform++; 534 DPRINTF(("ipcomp_output_cb: crypto error %d\n", crp->crp_etype)); 535 error = crp->crp_etype; 536 goto bad; 537 } 538 /* Shouldn't happen... */ 539 if (m == NULL) { 540 ipcompstat.ipcomps_crypto++; 541 DPRINTF(("ipcomp_output_cb: bogus return buffer from crypto\n")); 542 error = EINVAL; 543 goto bad; 544 } 545 ipcompstat.ipcomps_hist[sav->alg_comp]++; 546 547 if (rlen > crp->crp_olen) { 548 /* Inject IPCOMP header */ 549 mo = m_makespace(m, skip, IPCOMP_HLENGTH, &roff); 550 if (mo == NULL) { 551 ipcompstat.ipcomps_wrap++; 552 DPRINTF(("ipcomp_output: failed to inject IPCOMP header for " 553 "IPCA %s/%08lx\n", 554 ipsec_address(&sav->sah->saidx.dst), 555 (u_long) ntohl(sav->spi))); 556 error = ENOBUFS; 557 goto bad; 558 } 559 ipcomp = (struct ipcomp *)(mtod(mo, char *) + roff); 560 561 /* Initialize the IPCOMP header */ 562 /* XXX alignment always correct? */ 563 switch (sav->sah->saidx.dst.sa.sa_family) { 564 #ifdef INET 565 case AF_INET: 566 ipcomp->comp_nxt = mtod(m, struct ip *)->ip_p; 567 break; 568 #endif /* INET */ 569 #ifdef INET6 570 case AF_INET6: 571 ipcomp->comp_nxt = mtod(m, struct ip6_hdr *)->ip6_nxt; 572 break; 573 #endif 574 } 575 ipcomp->comp_flags = 0; 576 577 if ((sav->flags & SADB_X_EXT_RAWCPI) == 0) 578 cpi = sav->alg_enc; 579 else 580 cpi = ntohl(sav->spi) & 0xffff; 581 ipcomp->comp_cpi = htons(cpi); 582 583 /* Fix Next Protocol in IPv4/IPv6 header */ 584 prot = IPPROTO_IPCOMP; 585 m_copyback(m, tc->tc_protoff, sizeof(u_int8_t), (u_char *)&prot); 586 587 /* Adjust the length in the IP header */ 588 switch (sav->sah->saidx.dst.sa.sa_family) { 589 #ifdef INET 590 case AF_INET: 591 mtod(m, struct ip *)->ip_len = htons(m->m_pkthdr.len); 592 break; 593 #endif /* INET */ 594 #ifdef INET6 595 case AF_INET6: 596 mtod(m, struct ip6_hdr *)->ip6_plen = 597 htons(m->m_pkthdr.len) - sizeof(struct ip6_hdr); 598 break; 599 #endif /* INET6 */ 600 default: 601 ipcompstat.ipcomps_nopf++; 602 DPRINTF(("ipcomp_output: unknown/unsupported protocol " 603 "family %d, IPCA %s/%08lx\n", 604 sav->sah->saidx.dst.sa.sa_family, 605 ipsec_address(&sav->sah->saidx.dst), 606 (u_long) ntohl(sav->spi))); 607 error = EPFNOSUPPORT; 608 goto bad; 609 } 610 } else { 611 /* compression was useless, we have lost time */ 612 ipcompstat.ipcomps_uselesscomp++; 613 DPRINTF(("ipcomp_output_cb: compression was useless : initial size was %d" 614 "and compressed size is %d\n", rlen, crp->crp_olen)); 615 } 616 617 618 /* Release the crypto descriptor */ 619 free(tc, M_XDATA); 620 crypto_freereq(crp); 621 622 /* NB: m is reclaimed by ipsec_process_done. */ 623 error = ipsec_process_done(m, isr); 624 KEY_FREESAV(&sav); 625 splx(s); 626 return error; 627 bad: 628 if (sav) 629 KEY_FREESAV(&sav); 630 splx(s); 631 if (m) 632 m_freem(m); 633 free(tc, M_XDATA); 634 crypto_freereq(crp); 635 return error; 636 } 637 638 static struct xformsw ipcomp_xformsw = { 639 XF_IPCOMP, XFT_COMP, "IPcomp", 640 ipcomp_init, ipcomp_zeroize, ipcomp_input, 641 ipcomp_output, 642 NULL, 643 }; 644 645 INITFN void 646 ipcomp_attach(void) 647 { 648 xform_register(&ipcomp_xformsw); 649 } 650 651 #ifdef __FreeBSD__ 652 SYSINIT(ipcomp_xform_init, SI_SUB_DRIVERS, SI_ORDER_FIRST, ipcomp_attach, NULL) 653 #endif /* __FreeBSD__ */ 654