xform_ipcomp.c revision 1.15
1 /* $NetBSD: xform_ipcomp.c,v 1.15 2007/09/22 23:33:18 degroote 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 1.15 2007/09/22 23:33:18 degroote 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; 109 110 /* NB: algorithm really comes in alg_enc and not alg_comp! */ 111 tcomp = ipcomp_algorithm_lookup(sav->alg_enc); 112 if (tcomp == NULL) { 113 DPRINTF(("ipcomp_init: unsupported compression algorithm %d\n", 114 sav->alg_comp)); 115 return EINVAL; 116 } 117 sav->alg_comp = sav->alg_enc; /* set for doing histogram */ 118 sav->tdb_xform = xsp; 119 sav->tdb_compalgxform = tcomp; 120 121 /* Initialize crypto session */ 122 bzero(&cric, sizeof (cric)); 123 cric.cri_alg = sav->tdb_compalgxform->type; 124 125 return crypto_newsession(&sav->tdb_cryptoid, &cric, crypto_support); 126 } 127 128 /* 129 * ipcomp_zeroize() used when IPCA is deleted 130 */ 131 static int 132 ipcomp_zeroize(struct secasvar *sav) 133 { 134 int err; 135 136 err = crypto_freesession(sav->tdb_cryptoid); 137 sav->tdb_cryptoid = 0; 138 return err; 139 } 140 141 /* 142 * ipcomp_input() gets called to uncompress an input packet 143 */ 144 static int 145 ipcomp_input(struct mbuf *m, struct secasvar *sav, int skip, int protoff) 146 { 147 struct tdb_crypto *tc; 148 struct cryptodesc *crdc; 149 struct cryptop *crp; 150 int hlen = IPCOMP_HLENGTH; 151 152 IPSEC_SPLASSERT_SOFTNET("ipcomp_input"); 153 154 /* Get crypto descriptors */ 155 crp = crypto_getreq(1); 156 if (crp == NULL) { 157 m_freem(m); 158 DPRINTF(("ipcomp_input: no crypto descriptors\n")); 159 ipcompstat.ipcomps_crypto++; 160 return ENOBUFS; 161 } 162 /* Get IPsec-specific opaque pointer */ 163 tc = (struct tdb_crypto *) malloc(sizeof (*tc), M_XDATA, M_NOWAIT|M_ZERO); 164 if (tc == NULL) { 165 m_freem(m); 166 crypto_freereq(crp); 167 DPRINTF(("ipcomp_input: cannot allocate tdb_crypto\n")); 168 ipcompstat.ipcomps_crypto++; 169 return ENOBUFS; 170 } 171 crdc = crp->crp_desc; 172 173 crdc->crd_skip = skip + hlen; 174 crdc->crd_len = m->m_pkthdr.len - (skip + hlen); 175 crdc->crd_inject = skip; 176 177 tc->tc_ptr = 0; 178 179 /* Decompression operation */ 180 crdc->crd_alg = sav->tdb_compalgxform->type; 181 182 /* Crypto operation descriptor */ 183 crp->crp_ilen = m->m_pkthdr.len - (skip + hlen); 184 crp->crp_flags = CRYPTO_F_IMBUF; 185 crp->crp_buf = m; 186 crp->crp_callback = ipcomp_input_cb; 187 crp->crp_sid = sav->tdb_cryptoid; 188 crp->crp_opaque = tc; 189 190 /* These are passed as-is to the callback */ 191 tc->tc_spi = sav->spi; 192 tc->tc_dst = sav->sah->saidx.dst; 193 tc->tc_proto = sav->sah->saidx.proto; 194 tc->tc_protoff = protoff; 195 tc->tc_skip = skip; 196 197 return crypto_dispatch(crp); 198 } 199 200 #ifdef INET6 201 #define IPSEC_COMMON_INPUT_CB(m, sav, skip, protoff, mtag) do { \ 202 if (saidx->dst.sa.sa_family == AF_INET6) { \ 203 error = ipsec6_common_input_cb(m, sav, skip, protoff, mtag); \ 204 } else { \ 205 error = ipsec4_common_input_cb(m, sav, skip, protoff, mtag); \ 206 } \ 207 } while (0) 208 #else 209 #define IPSEC_COMMON_INPUT_CB(m, sav, skip, protoff, mtag) \ 210 (error = ipsec4_common_input_cb(m, sav, skip, protoff, mtag)) 211 #endif 212 213 /* 214 * IPComp input callback from the crypto driver. 215 */ 216 static int 217 ipcomp_input_cb(struct cryptop *crp) 218 { 219 struct cryptodesc *crd; 220 struct tdb_crypto *tc; 221 int skip, protoff; 222 struct mtag *mtag; 223 struct mbuf *m; 224 struct secasvar *sav; 225 struct secasindex *saidx; 226 int s, hlen = IPCOMP_HLENGTH, error, clen; 227 u_int8_t nproto; 228 void *addr; 229 u_int16_t dport = 0; 230 u_int16_t sport = 0; 231 #ifdef IPSEC_NAT_T 232 struct m_tag * tag = NULL; 233 #endif 234 235 crd = crp->crp_desc; 236 237 tc = (struct tdb_crypto *) crp->crp_opaque; 238 IPSEC_ASSERT(tc != NULL, ("ipcomp_input_cb: null opaque crypto data area!")); 239 skip = tc->tc_skip; 240 protoff = tc->tc_protoff; 241 mtag = (struct mtag *) tc->tc_ptr; 242 m = (struct mbuf *) crp->crp_buf; 243 244 #ifdef IPSEC_NAT_T 245 /* find the source port for NAT-T */ 246 if ((tag = m_tag_find(m, PACKET_TAG_IPSEC_NAT_T_PORTS, NULL))) { 247 sport = ((u_int16_t *)(tag + 1))[0]; 248 dport = ((u_int16_t *)(tag + 1))[1]; 249 } 250 #endif 251 252 s = splsoftnet(); 253 254 sav = KEY_ALLOCSA(&tc->tc_dst, tc->tc_proto, tc->tc_spi, sport, dport); 255 if (sav == NULL) { 256 ipcompstat.ipcomps_notdb++; 257 DPRINTF(("ipcomp_input_cb: SA expired while in crypto\n")); 258 error = ENOBUFS; /*XXX*/ 259 goto bad; 260 } 261 262 saidx = &sav->sah->saidx; 263 IPSEC_ASSERT(saidx->dst.sa.sa_family == AF_INET || 264 saidx->dst.sa.sa_family == AF_INET6, 265 ("ah_input_cb: unexpected protocol family %u", 266 saidx->dst.sa.sa_family)); 267 268 /* Check for crypto errors */ 269 if (crp->crp_etype) { 270 /* Reset the session ID */ 271 if (sav->tdb_cryptoid != 0) 272 sav->tdb_cryptoid = crp->crp_sid; 273 274 if (crp->crp_etype == EAGAIN) { 275 KEY_FREESAV(&sav); 276 splx(s); 277 return crypto_dispatch(crp); 278 } 279 280 ipcompstat.ipcomps_noxform++; 281 DPRINTF(("ipcomp_input_cb: crypto error %d\n", crp->crp_etype)); 282 error = crp->crp_etype; 283 goto bad; 284 } 285 /* Shouldn't happen... */ 286 if (m == NULL) { 287 ipcompstat.ipcomps_crypto++; 288 DPRINTF(("ipcomp_input_cb: null mbuf returned from crypto\n")); 289 error = EINVAL; 290 goto bad; 291 } 292 ipcompstat.ipcomps_hist[sav->alg_comp]++; 293 294 clen = crp->crp_olen; /* Length of data after processing */ 295 296 /* Release the crypto descriptors */ 297 free(tc, M_XDATA), tc = NULL; 298 crypto_freereq(crp), crp = NULL; 299 300 /* In case it's not done already, adjust the size of the mbuf chain */ 301 m->m_pkthdr.len = clen + hlen + skip; 302 303 if (m->m_len < skip + hlen && (m = m_pullup(m, skip + hlen)) == 0) { 304 ipcompstat.ipcomps_hdrops++; /*XXX*/ 305 DPRINTF(("ipcomp_input_cb: m_pullup failed\n")); 306 error = EINVAL; /*XXX*/ 307 goto bad; 308 } 309 310 /* Keep the next protocol field */ 311 addr = (uint8_t*) mtod(m, struct ip *) + skip; 312 nproto = ((struct ipcomp *) addr)->comp_nxt; 313 314 /* Remove the IPCOMP header */ 315 error = m_striphdr(m, skip, hlen); 316 if (error) { 317 ipcompstat.ipcomps_hdrops++; 318 DPRINTF(("ipcomp_input_cb: bad mbuf chain, IPCA %s/%08lx\n", 319 ipsec_address(&sav->sah->saidx.dst), 320 (u_long) ntohl(sav->spi))); 321 goto bad; 322 } 323 324 /* Restore the Next Protocol field */ 325 m_copyback(m, protoff, sizeof (u_int8_t), (u_int8_t *) &nproto); 326 327 IPSEC_COMMON_INPUT_CB(m, sav, skip, protoff, NULL); 328 329 KEY_FREESAV(&sav); 330 splx(s); 331 return error; 332 bad: 333 if (sav) 334 KEY_FREESAV(&sav); 335 splx(s); 336 if (m) 337 m_freem(m); 338 if (tc != NULL) 339 free(tc, M_XDATA); 340 if (crp) 341 crypto_freereq(crp); 342 return error; 343 } 344 345 /* 346 * IPComp output routine, called by ipsec[46]_process_packet() 347 */ 348 static int 349 ipcomp_output( 350 struct mbuf *m, 351 struct ipsecrequest *isr, 352 struct mbuf **mp, 353 int skip, 354 int protoff 355 ) 356 { 357 struct secasvar *sav; 358 struct comp_algo *ipcompx; 359 int error, ralen, hlen, maxpacketsize; 360 struct cryptodesc *crdc; 361 struct cryptop *crp; 362 struct tdb_crypto *tc; 363 364 IPSEC_SPLASSERT_SOFTNET("ipcomp_output"); 365 sav = isr->sav; 366 IPSEC_ASSERT(sav != NULL, ("ipcomp_output: null SA")); 367 ipcompx = sav->tdb_compalgxform; 368 IPSEC_ASSERT(ipcompx != NULL, ("ipcomp_output: null compression xform")); 369 370 ralen = m->m_pkthdr.len - skip; /* Raw payload length before comp. */ 371 372 /* Don't process the packet if it is too short */ 373 if (ralen < ipcompx->minlen) { 374 ipcompstat.ipcomps_minlen++; 375 return ipsec_process_done(m,isr); 376 } 377 378 hlen = IPCOMP_HLENGTH; 379 380 ipcompstat.ipcomps_output++; 381 382 /* Check for maximum packet size violations. */ 383 switch (sav->sah->saidx.dst.sa.sa_family) { 384 #ifdef INET 385 case AF_INET: 386 maxpacketsize = IP_MAXPACKET; 387 break; 388 #endif /* INET */ 389 #ifdef INET6 390 case AF_INET6: 391 maxpacketsize = IPV6_MAXPACKET; 392 break; 393 #endif /* INET6 */ 394 default: 395 ipcompstat.ipcomps_nopf++; 396 DPRINTF(("ipcomp_output: unknown/unsupported protocol family %d" 397 ", IPCA %s/%08lx\n", 398 sav->sah->saidx.dst.sa.sa_family, 399 ipsec_address(&sav->sah->saidx.dst), 400 (u_long) ntohl(sav->spi))); 401 error = EPFNOSUPPORT; 402 goto bad; 403 } 404 if (skip + hlen + ralen > maxpacketsize) { 405 ipcompstat.ipcomps_toobig++; 406 DPRINTF(("ipcomp_output: packet in IPCA %s/%08lx got too big " 407 "(len %u, max len %u)\n", 408 ipsec_address(&sav->sah->saidx.dst), 409 (u_long) ntohl(sav->spi), 410 skip + hlen + ralen, maxpacketsize)); 411 error = EMSGSIZE; 412 goto bad; 413 } 414 415 /* Update the counters */ 416 ipcompstat.ipcomps_obytes += m->m_pkthdr.len - skip; 417 418 m = m_clone(m); 419 if (m == NULL) { 420 ipcompstat.ipcomps_hdrops++; 421 DPRINTF(("ipcomp_output: cannot clone mbuf chain, IPCA %s/%08lx\n", 422 ipsec_address(&sav->sah->saidx.dst), 423 (u_long) ntohl(sav->spi))); 424 error = ENOBUFS; 425 goto bad; 426 } 427 428 /* Ok now, we can pass to the crypto processing */ 429 430 /* Get crypto descriptors */ 431 crp = crypto_getreq(1); 432 if (crp == NULL) { 433 ipcompstat.ipcomps_crypto++; 434 DPRINTF(("ipcomp_output: failed to acquire crypto descriptor\n")); 435 error = ENOBUFS; 436 goto bad; 437 } 438 crdc = crp->crp_desc; 439 440 /* Compression descriptor */ 441 crdc->crd_skip = skip; 442 crdc->crd_len = m->m_pkthdr.len - skip; 443 crdc->crd_flags = CRD_F_COMP; 444 crdc->crd_inject = skip; 445 446 /* Compression operation */ 447 crdc->crd_alg = ipcompx->type; 448 449 /* IPsec-specific opaque crypto info */ 450 tc = (struct tdb_crypto *) malloc(sizeof(struct tdb_crypto), 451 M_XDATA, M_NOWAIT|M_ZERO); 452 if (tc == NULL) { 453 ipcompstat.ipcomps_crypto++; 454 DPRINTF(("ipcomp_output: failed to allocate tdb_crypto\n")); 455 crypto_freereq(crp); 456 error = ENOBUFS; 457 goto bad; 458 } 459 460 tc->tc_isr = isr; 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_skip = skip; 465 tc->tc_protoff = protoff; 466 467 /* Crypto operation descriptor */ 468 crp->crp_ilen = m->m_pkthdr.len; /* Total input length */ 469 crp->crp_flags = CRYPTO_F_IMBUF; 470 crp->crp_buf = m; 471 crp->crp_callback = ipcomp_output_cb; 472 crp->crp_opaque = 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, *mo; 492 int s, error, skip, rlen, roff; 493 u_int8_t prot; 494 u_int16_t cpi; 495 struct ipcomp * ipcomp; 496 497 498 tc = (struct tdb_crypto *) crp->crp_opaque; 499 IPSEC_ASSERT(tc != NULL, ("ipcomp_output_cb: null opaque data area!")); 500 m = (struct mbuf *) crp->crp_buf; 501 skip = tc->tc_skip; 502 rlen = crp->crp_ilen - skip; 503 504 s = splsoftnet(); 505 506 isr = tc->tc_isr; 507 sav = KEY_ALLOCSA(&tc->tc_dst, tc->tc_proto, tc->tc_spi, 0, 0); 508 if (sav == NULL) { 509 ipcompstat.ipcomps_notdb++; 510 DPRINTF(("ipcomp_output_cb: SA expired while in crypto\n")); 511 error = ENOBUFS; /*XXX*/ 512 goto bad; 513 } 514 IPSEC_ASSERT(isr->sav == sav, ("ipcomp_output_cb: SA changed\n")); 515 516 /* Check for crypto errors */ 517 if (crp->crp_etype) { 518 /* Reset session ID */ 519 if (sav->tdb_cryptoid != 0) 520 sav->tdb_cryptoid = crp->crp_sid; 521 522 if (crp->crp_etype == EAGAIN) { 523 KEY_FREESAV(&sav); 524 splx(s); 525 return crypto_dispatch(crp); 526 } 527 ipcompstat.ipcomps_noxform++; 528 DPRINTF(("ipcomp_output_cb: crypto error %d\n", crp->crp_etype)); 529 error = crp->crp_etype; 530 goto bad; 531 } 532 /* Shouldn't happen... */ 533 if (m == NULL) { 534 ipcompstat.ipcomps_crypto++; 535 DPRINTF(("ipcomp_output_cb: bogus return buffer from crypto\n")); 536 error = EINVAL; 537 goto bad; 538 } 539 ipcompstat.ipcomps_hist[sav->alg_comp]++; 540 541 if (rlen > crp->crp_olen) { 542 /* Inject IPCOMP header */ 543 mo = m_makespace(m, skip, IPCOMP_HLENGTH, &roff); 544 if (mo == NULL) { 545 ipcompstat.ipcomps_wrap++; 546 DPRINTF(("ipcomp_output: failed to inject IPCOMP header for " 547 "IPCA %s/%08lx\n", 548 ipsec_address(&sav->sah->saidx.dst), 549 (u_long) ntohl(sav->spi))); 550 error = ENOBUFS; 551 goto bad; 552 } 553 ipcomp = (struct ipcomp *)(mtod(mo, char *) + roff); 554 555 /* Initialize the IPCOMP header */ 556 /* XXX alignment always correct? */ 557 switch (sav->sah->saidx.dst.sa.sa_family) { 558 #ifdef INET 559 case AF_INET: 560 ipcomp->comp_nxt = mtod(m, struct ip *)->ip_p; 561 break; 562 #endif /* INET */ 563 #ifdef INET6 564 case AF_INET6: 565 ipcomp->comp_nxt = mtod(m, struct ip6_hdr *)->ip6_nxt; 566 break; 567 #endif 568 } 569 ipcomp->comp_flags = 0; 570 571 if ((sav->flags & SADB_X_EXT_RAWCPI) == 0) 572 cpi = sav->alg_enc; 573 else 574 cpi = ntohl(sav->spi) & 0xffff; 575 ipcomp->comp_cpi = htons(cpi); 576 577 /* Fix Next Protocol in IPv4/IPv6 header */ 578 prot = IPPROTO_IPCOMP; 579 m_copyback(m, tc->tc_protoff, sizeof(u_int8_t), (u_char *)&prot); 580 581 /* Adjust the length in the IP header */ 582 switch (sav->sah->saidx.dst.sa.sa_family) { 583 #ifdef INET 584 case AF_INET: 585 mtod(m, struct ip *)->ip_len = htons(m->m_pkthdr.len); 586 break; 587 #endif /* INET */ 588 #ifdef INET6 589 case AF_INET6: 590 mtod(m, struct ip6_hdr *)->ip6_plen = 591 htons(m->m_pkthdr.len) - sizeof(struct ip6_hdr); 592 break; 593 #endif /* INET6 */ 594 default: 595 ipcompstat.ipcomps_nopf++; 596 DPRINTF(("ipcomp_output: unknown/unsupported protocol " 597 "family %d, IPCA %s/%08lx\n", 598 sav->sah->saidx.dst.sa.sa_family, 599 ipsec_address(&sav->sah->saidx.dst), 600 (u_long) ntohl(sav->spi))); 601 error = EPFNOSUPPORT; 602 goto bad; 603 } 604 } else { 605 /* compression was useless, we have lost time */ 606 /* XXX add statistic */ 607 } 608 609 /* Release the crypto descriptor */ 610 free(tc, M_XDATA); 611 crypto_freereq(crp); 612 613 /* NB: m is reclaimed by ipsec_process_done. */ 614 error = ipsec_process_done(m, isr); 615 KEY_FREESAV(&sav); 616 splx(s); 617 return error; 618 bad: 619 if (sav) 620 KEY_FREESAV(&sav); 621 splx(s); 622 if (m) 623 m_freem(m); 624 free(tc, M_XDATA); 625 crypto_freereq(crp); 626 return error; 627 } 628 629 static struct xformsw ipcomp_xformsw = { 630 XF_IPCOMP, XFT_COMP, "IPcomp", 631 ipcomp_init, ipcomp_zeroize, ipcomp_input, 632 ipcomp_output, 633 NULL, 634 }; 635 636 INITFN void 637 ipcomp_attach(void) 638 { 639 xform_register(&ipcomp_xformsw); 640 } 641 642 #ifdef __FreeBSD__ 643 SYSINIT(ipcomp_xform_init, SI_SUB_DRIVERS, SI_ORDER_FIRST, ipcomp_attach, NULL) 644 #endif /* __FreeBSD__ */ 645
Indexes created Tue Sep 23 20:09:58 GMT 2025