1 /* $NetBSD: xform_ipcomp.c,v 1.19 2009/03/18 16:00:23 cegger 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 1.19 2009/03/18 16:00:23 cegger 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/ipsec_private.h> 57 #include <netipsec/xform.h> 58 59 #ifdef INET6 60 #include <netinet/ip6.h> 61 #include <netipsec/ipsec6.h> 62 #endif 63 64 #include <netipsec/ipcomp.h> 65 #include <netipsec/ipcomp_var.h> 66 67 #include <netipsec/key.h> 68 #include <netipsec/key_debug.h> 69 70 #include <netipsec/ipsec_osdep.h> 71 72 #include <opencrypto/cryptodev.h> 73 #include <opencrypto/deflate.h> 74 #include <opencrypto/xform.h> 75 76 percpu_t *ipcompstat_percpu; 77 78 int ipcomp_enable = 1; 79 80 #ifdef __FreeBSD__ 81 SYSCTL_DECL(_net_inet_ipcomp); 82 SYSCTL_INT(_net_inet_ipcomp, OID_AUTO, 83 ipcomp_enable, CTLFLAG_RW, &ipcomp_enable, 0, ""); 84 SYSCTL_STRUCT(_net_inet_ipcomp, IPSECCTL_STATS, 85 stats, CTLFLAG_RD, &ipcompstat, ipcompstat, ""); 86 #endif /* __FreeBSD__ */ 87 88 static int ipcomp_input_cb(struct cryptop *crp); 89 static int ipcomp_output_cb(struct cryptop *crp); 90 91 struct comp_algo * 92 ipcomp_algorithm_lookup(int alg) 93 { 94 if (alg >= IPCOMP_ALG_MAX) 95 return NULL; 96 switch (alg) { 97 case SADB_X_CALG_DEFLATE: 98 return &comp_algo_deflate; 99 } 100 return NULL; 101 } 102 103 /* 104 * ipcomp_init() is called when an CPI is being set up. 105 */ 106 static int 107 ipcomp_init(struct secasvar *sav, struct xformsw *xsp) 108 { 109 struct comp_algo *tcomp; 110 struct cryptoini cric; 111 int ses; 112 113 /* NB: algorithm really comes in alg_enc and not alg_comp! */ 114 tcomp = ipcomp_algorithm_lookup(sav->alg_enc); 115 if (tcomp == NULL) { 116 DPRINTF(("ipcomp_init: unsupported compression algorithm %d\n", 117 sav->alg_comp)); 118 return EINVAL; 119 } 120 sav->alg_comp = sav->alg_enc; /* set for doing histogram */ 121 sav->tdb_xform = xsp; 122 sav->tdb_compalgxform = tcomp; 123 124 /* Initialize crypto session */ 125 memset(&cric, 0, sizeof (cric)); 126 cric.cri_alg = sav->tdb_compalgxform->type; 127 128 mutex_spin_enter(&crypto_mtx); 129 ses = crypto_newsession(&sav->tdb_cryptoid, &cric, crypto_support); 130 mutex_spin_exit(&crypto_mtx); 131 return ses; 132 } 133 134 /* 135 * ipcomp_zeroize() used when IPCA is deleted 136 */ 137 static int 138 ipcomp_zeroize(struct secasvar *sav) 139 { 140 int err; 141 142 mutex_spin_enter(&crypto_mtx); 143 err = crypto_freesession(sav->tdb_cryptoid); 144 mutex_spin_exit(&crypto_mtx); 145 sav->tdb_cryptoid = 0; 146 return err; 147 } 148 149 /* 150 * ipcomp_input() gets called to uncompress an input packet 151 */ 152 static int 153 ipcomp_input(struct mbuf *m, struct secasvar *sav, int skip, int protoff) 154 { 155 struct tdb_crypto *tc; 156 struct cryptodesc *crdc; 157 struct cryptop *crp; 158 int hlen = IPCOMP_HLENGTH; 159 160 IPSEC_SPLASSERT_SOFTNET("ipcomp_input"); 161 162 /* Get crypto descriptors */ 163 crp = crypto_getreq(1); 164 if (crp == NULL) { 165 m_freem(m); 166 DPRINTF(("ipcomp_input: no crypto descriptors\n")); 167 IPCOMP_STATINC(IPCOMP_STAT_CRYPTO); 168 return ENOBUFS; 169 } 170 /* Get IPsec-specific opaque pointer */ 171 tc = (struct tdb_crypto *) malloc(sizeof (*tc), M_XDATA, M_NOWAIT|M_ZERO); 172 if (tc == NULL) { 173 m_freem(m); 174 crypto_freereq(crp); 175 DPRINTF(("ipcomp_input: cannot allocate tdb_crypto\n")); 176 IPCOMP_STATINC(IPCOMP_STAT_CRYPTO); 177 return ENOBUFS; 178 } 179 crdc = crp->crp_desc; 180 181 crdc->crd_skip = skip + hlen; 182 crdc->crd_len = m->m_pkthdr.len - (skip + hlen); 183 crdc->crd_inject = skip; 184 185 tc->tc_ptr = 0; 186 187 /* Decompression operation */ 188 crdc->crd_alg = sav->tdb_compalgxform->type; 189 190 /* Crypto operation descriptor */ 191 crp->crp_ilen = m->m_pkthdr.len - (skip + hlen); 192 crp->crp_flags = CRYPTO_F_IMBUF; 193 crp->crp_buf = m; 194 crp->crp_callback = ipcomp_input_cb; 195 crp->crp_sid = sav->tdb_cryptoid; 196 crp->crp_opaque = tc; 197 198 /* These are passed as-is to the callback */ 199 tc->tc_spi = sav->spi; 200 tc->tc_dst = sav->sah->saidx.dst; 201 tc->tc_proto = sav->sah->saidx.proto; 202 tc->tc_protoff = protoff; 203 tc->tc_skip = skip; 204 205 return crypto_dispatch(crp); 206 } 207 208 #ifdef INET6 209 #define IPSEC_COMMON_INPUT_CB(m, sav, skip, protoff, mtag) do { \ 210 if (saidx->dst.sa.sa_family == AF_INET6) { \ 211 error = ipsec6_common_input_cb(m, sav, skip, protoff, mtag); \ 212 } else { \ 213 error = ipsec4_common_input_cb(m, sav, skip, protoff, mtag); \ 214 } \ 215 } while (0) 216 #else 217 #define IPSEC_COMMON_INPUT_CB(m, sav, skip, protoff, mtag) \ 218 (error = ipsec4_common_input_cb(m, sav, skip, protoff, mtag)) 219 #endif 220 221 /* 222 * IPComp input callback from the crypto driver. 223 */ 224 static int 225 ipcomp_input_cb(struct cryptop *crp) 226 { 227 struct cryptodesc *crd; 228 struct tdb_crypto *tc; 229 int skip, protoff; 230 struct mtag *mtag; 231 struct mbuf *m; 232 struct secasvar *sav; 233 struct secasindex *saidx; 234 int s, hlen = IPCOMP_HLENGTH, error, clen; 235 u_int8_t nproto; 236 void *addr; 237 u_int16_t dport = 0; 238 u_int16_t sport = 0; 239 #ifdef IPSEC_NAT_T 240 struct m_tag * tag = NULL; 241 #endif 242 243 crd = crp->crp_desc; 244 245 tc = (struct tdb_crypto *) crp->crp_opaque; 246 IPSEC_ASSERT(tc != NULL, ("ipcomp_input_cb: null opaque crypto data area!")); 247 skip = tc->tc_skip; 248 protoff = tc->tc_protoff; 249 mtag = (struct mtag *) tc->tc_ptr; 250 m = (struct mbuf *) crp->crp_buf; 251 252 #ifdef IPSEC_NAT_T 253 /* find the source port for NAT-T */ 254 if ((tag = m_tag_find(m, PACKET_TAG_IPSEC_NAT_T_PORTS, NULL))) { 255 sport = ((u_int16_t *)(tag + 1))[0]; 256 dport = ((u_int16_t *)(tag + 1))[1]; 257 } 258 #endif 259 260 s = splsoftnet(); 261 262 sav = KEY_ALLOCSA(&tc->tc_dst, tc->tc_proto, tc->tc_spi, sport, dport); 263 if (sav == NULL) { 264 IPCOMP_STATINC(IPCOMP_STAT_NOTDB); 265 DPRINTF(("ipcomp_input_cb: SA expired while in crypto\n")); 266 error = ENOBUFS; /*XXX*/ 267 goto bad; 268 } 269 270 saidx = &sav->sah->saidx; 271 IPSEC_ASSERT(saidx->dst.sa.sa_family == AF_INET || 272 saidx->dst.sa.sa_family == AF_INET6, 273 ("ah_input_cb: unexpected protocol family %u", 274 saidx->dst.sa.sa_family)); 275 276 /* Check for crypto errors */ 277 if (crp->crp_etype) { 278 /* Reset the session ID */ 279 if (sav->tdb_cryptoid != 0) 280 sav->tdb_cryptoid = crp->crp_sid; 281 282 if (crp->crp_etype == EAGAIN) { 283 KEY_FREESAV(&sav); 284 splx(s); 285 return crypto_dispatch(crp); 286 } 287 288 IPCOMP_STATINC(IPCOMP_STAT_NOXFORM); 289 DPRINTF(("ipcomp_input_cb: crypto error %d\n", crp->crp_etype)); 290 error = crp->crp_etype; 291 goto bad; 292 } 293 /* Shouldn't happen... */ 294 if (m == NULL) { 295 IPCOMP_STATINC(IPCOMP_STAT_CRYPTO); 296 DPRINTF(("ipcomp_input_cb: null mbuf returned from crypto\n")); 297 error = EINVAL; 298 goto bad; 299 } 300 IPCOMP_STATINC(IPCOMP_STAT_HIST + sav->alg_comp); 301 302 clen = crp->crp_olen; /* Length of data after processing */ 303 304 /* Release the crypto descriptors */ 305 free(tc, M_XDATA), tc = NULL; 306 crypto_freereq(crp), crp = NULL; 307 308 /* In case it's not done already, adjust the size of the mbuf chain */ 309 m->m_pkthdr.len = clen + hlen + skip; 310 311 if (m->m_len < skip + hlen && (m = m_pullup(m, skip + hlen)) == 0) { 312 IPCOMP_STATINC(IPCOMP_STAT_HDROPS); /*XXX*/ 313 DPRINTF(("ipcomp_input_cb: m_pullup failed\n")); 314 error = EINVAL; /*XXX*/ 315 goto bad; 316 } 317 318 /* Keep the next protocol field */ 319 addr = (uint8_t*) mtod(m, struct ip *) + skip; 320 nproto = ((struct ipcomp *) addr)->comp_nxt; 321 322 /* Remove the IPCOMP header */ 323 error = m_striphdr(m, skip, hlen); 324 if (error) { 325 IPCOMP_STATINC(IPCOMP_STAT_HDROPS); 326 DPRINTF(("ipcomp_input_cb: bad mbuf chain, IPCA %s/%08lx\n", 327 ipsec_address(&sav->sah->saidx.dst), 328 (u_long) ntohl(sav->spi))); 329 goto bad; 330 } 331 332 /* Restore the Next Protocol field */ 333 m_copyback(m, protoff, sizeof (u_int8_t), (u_int8_t *) &nproto); 334 335 IPSEC_COMMON_INPUT_CB(m, sav, skip, protoff, NULL); 336 337 KEY_FREESAV(&sav); 338 splx(s); 339 return error; 340 bad: 341 if (sav) 342 KEY_FREESAV(&sav); 343 splx(s); 344 if (m) 345 m_freem(m); 346 if (tc != NULL) 347 free(tc, M_XDATA); 348 if (crp) 349 crypto_freereq(crp); 350 return error; 351 } 352 353 /* 354 * IPComp output routine, called by ipsec[46]_process_packet() 355 */ 356 static int 357 ipcomp_output( 358 struct mbuf *m, 359 struct ipsecrequest *isr, 360 struct mbuf **mp, 361 int skip, 362 int protoff 363 ) 364 { 365 struct secasvar *sav; 366 struct comp_algo *ipcompx; 367 int error, ralen, hlen, maxpacketsize; 368 struct cryptodesc *crdc; 369 struct cryptop *crp; 370 struct tdb_crypto *tc; 371 372 IPSEC_SPLASSERT_SOFTNET("ipcomp_output"); 373 sav = isr->sav; 374 IPSEC_ASSERT(sav != NULL, ("ipcomp_output: null SA")); 375 ipcompx = sav->tdb_compalgxform; 376 IPSEC_ASSERT(ipcompx != NULL, ("ipcomp_output: null compression xform")); 377 378 ralen = m->m_pkthdr.len - skip; /* Raw payload length before comp. */ 379 380 /* Don't process the packet if it is too short */ 381 if (ralen < ipcompx->minlen) { 382 IPCOMP_STATINC(IPCOMP_STAT_MINLEN); 383 return ipsec_process_done(m,isr); 384 } 385 386 hlen = IPCOMP_HLENGTH; 387 388 IPCOMP_STATINC(IPCOMP_STAT_OUTPUT); 389 390 /* Check for maximum packet size violations. */ 391 switch (sav->sah->saidx.dst.sa.sa_family) { 392 #ifdef INET 393 case AF_INET: 394 maxpacketsize = IP_MAXPACKET; 395 break; 396 #endif /* INET */ 397 #ifdef INET6 398 case AF_INET6: 399 maxpacketsize = IPV6_MAXPACKET; 400 break; 401 #endif /* INET6 */ 402 default: 403 IPCOMP_STATINC(IPCOMP_STAT_NOPF); 404 DPRINTF(("ipcomp_output: unknown/unsupported protocol family %d" 405 ", IPCA %s/%08lx\n", 406 sav->sah->saidx.dst.sa.sa_family, 407 ipsec_address(&sav->sah->saidx.dst), 408 (u_long) ntohl(sav->spi))); 409 error = EPFNOSUPPORT; 410 goto bad; 411 } 412 if (skip + hlen + ralen > maxpacketsize) { 413 IPCOMP_STATINC(IPCOMP_STAT_TOOBIG); 414 DPRINTF(("ipcomp_output: packet in IPCA %s/%08lx got too big " 415 "(len %u, max len %u)\n", 416 ipsec_address(&sav->sah->saidx.dst), 417 (u_long) ntohl(sav->spi), 418 skip + hlen + ralen, maxpacketsize)); 419 error = EMSGSIZE; 420 goto bad; 421 } 422 423 /* Update the counters */ 424 IPCOMP_STATADD(IPCOMP_STAT_OBYTES, m->m_pkthdr.len - skip); 425 426 m = m_clone(m); 427 if (m == NULL) { 428 IPCOMP_STATINC(IPCOMP_STAT_HDROPS); 429 DPRINTF(("ipcomp_output: cannot clone mbuf chain, IPCA %s/%08lx\n", 430 ipsec_address(&sav->sah->saidx.dst), 431 (u_long) ntohl(sav->spi))); 432 error = ENOBUFS; 433 goto bad; 434 } 435 436 /* Ok now, we can pass to the crypto processing */ 437 438 /* Get crypto descriptors */ 439 crp = crypto_getreq(1); 440 if (crp == NULL) { 441 IPCOMP_STATINC(IPCOMP_STAT_CRYPTO); 442 DPRINTF(("ipcomp_output: failed to acquire crypto descriptor\n")); 443 error = ENOBUFS; 444 goto bad; 445 } 446 crdc = crp->crp_desc; 447 448 /* Compression descriptor */ 449 crdc->crd_skip = skip; 450 crdc->crd_len = m->m_pkthdr.len - skip; 451 crdc->crd_flags = CRD_F_COMP; 452 crdc->crd_inject = skip; 453 454 /* Compression operation */ 455 crdc->crd_alg = ipcompx->type; 456 457 /* IPsec-specific opaque crypto info */ 458 tc = (struct tdb_crypto *) malloc(sizeof(struct tdb_crypto), 459 M_XDATA, M_NOWAIT|M_ZERO); 460 if (tc == NULL) { 461 IPCOMP_STATINC(IPCOMP_STAT_CRYPTO); 462 DPRINTF(("ipcomp_output: failed to allocate tdb_crypto\n")); 463 crypto_freereq(crp); 464 error = ENOBUFS; 465 goto bad; 466 } 467 468 tc->tc_isr = isr; 469 tc->tc_spi = sav->spi; 470 tc->tc_dst = sav->sah->saidx.dst; 471 tc->tc_proto = sav->sah->saidx.proto; 472 tc->tc_skip = skip; 473 tc->tc_protoff = protoff; 474 475 /* Crypto operation descriptor */ 476 crp->crp_ilen = m->m_pkthdr.len; /* Total input length */ 477 crp->crp_flags = CRYPTO_F_IMBUF; 478 crp->crp_buf = m; 479 crp->crp_callback = ipcomp_output_cb; 480 crp->crp_opaque = tc; 481 crp->crp_sid = sav->tdb_cryptoid; 482 483 return crypto_dispatch(crp); 484 bad: 485 if (m) 486 m_freem(m); 487 return (error); 488 } 489 490 /* 491 * IPComp output callback from the crypto driver. 492 */ 493 static int 494 ipcomp_output_cb(struct cryptop *crp) 495 { 496 struct tdb_crypto *tc; 497 struct ipsecrequest *isr; 498 struct secasvar *sav; 499 struct mbuf *m, *mo; 500 int s, error, skip, rlen, roff; 501 u_int8_t prot; 502 u_int16_t cpi; 503 struct ipcomp * ipcomp; 504 505 506 tc = (struct tdb_crypto *) crp->crp_opaque; 507 IPSEC_ASSERT(tc != NULL, ("ipcomp_output_cb: null opaque data area!")); 508 m = (struct mbuf *) crp->crp_buf; 509 skip = tc->tc_skip; 510 rlen = crp->crp_ilen - skip; 511 512 s = splsoftnet(); 513 514 isr = tc->tc_isr; 515 sav = KEY_ALLOCSA(&tc->tc_dst, tc->tc_proto, tc->tc_spi, 0, 0); 516 if (sav == NULL) { 517 IPCOMP_STATINC(IPCOMP_STAT_NOTDB); 518 DPRINTF(("ipcomp_output_cb: SA expired while in crypto\n")); 519 error = ENOBUFS; /*XXX*/ 520 goto bad; 521 } 522 IPSEC_ASSERT(isr->sav == sav, ("ipcomp_output_cb: SA changed\n")); 523 524 /* Check for crypto errors */ 525 if (crp->crp_etype) { 526 /* Reset session ID */ 527 if (sav->tdb_cryptoid != 0) 528 sav->tdb_cryptoid = crp->crp_sid; 529 530 if (crp->crp_etype == EAGAIN) { 531 KEY_FREESAV(&sav); 532 splx(s); 533 return crypto_dispatch(crp); 534 } 535 IPCOMP_STATINC(IPCOMP_STAT_NOXFORM); 536 DPRINTF(("ipcomp_output_cb: crypto error %d\n", crp->crp_etype)); 537 error = crp->crp_etype; 538 goto bad; 539 } 540 /* Shouldn't happen... */ 541 if (m == NULL) { 542 IPCOMP_STATINC(IPCOMP_STAT_CRYPTO); 543 DPRINTF(("ipcomp_output_cb: bogus return buffer from crypto\n")); 544 error = EINVAL; 545 goto bad; 546 } 547 IPCOMP_STATINC(IPCOMP_STAT_HIST + sav->alg_comp); 548 549 if (rlen > crp->crp_olen) { 550 /* Inject IPCOMP header */ 551 mo = m_makespace(m, skip, IPCOMP_HLENGTH, &roff); 552 if (mo == NULL) { 553 IPCOMP_STATINC(IPCOMP_STAT_WRAP); 554 DPRINTF(("ipcomp_output: failed to inject IPCOMP header for " 555 "IPCA %s/%08lx\n", 556 ipsec_address(&sav->sah->saidx.dst), 557 (u_long) ntohl(sav->spi))); 558 error = ENOBUFS; 559 goto bad; 560 } 561 ipcomp = (struct ipcomp *)(mtod(mo, char *) + roff); 562 563 /* Initialize the IPCOMP header */ 564 /* XXX alignment always correct? */ 565 switch (sav->sah->saidx.dst.sa.sa_family) { 566 #ifdef INET 567 case AF_INET: 568 ipcomp->comp_nxt = mtod(m, struct ip *)->ip_p; 569 break; 570 #endif /* INET */ 571 #ifdef INET6 572 case AF_INET6: 573 ipcomp->comp_nxt = mtod(m, struct ip6_hdr *)->ip6_nxt; 574 break; 575 #endif 576 } 577 ipcomp->comp_flags = 0; 578 579 if ((sav->flags & SADB_X_EXT_RAWCPI) == 0) 580 cpi = sav->alg_enc; 581 else 582 cpi = ntohl(sav->spi) & 0xffff; 583 ipcomp->comp_cpi = htons(cpi); 584 585 /* Fix Next Protocol in IPv4/IPv6 header */ 586 prot = IPPROTO_IPCOMP; 587 m_copyback(m, tc->tc_protoff, sizeof(u_int8_t), (u_char *)&prot); 588 589 /* Adjust the length in the IP header */ 590 switch (sav->sah->saidx.dst.sa.sa_family) { 591 #ifdef INET 592 case AF_INET: 593 mtod(m, struct ip *)->ip_len = htons(m->m_pkthdr.len); 594 break; 595 #endif /* INET */ 596 #ifdef INET6 597 case AF_INET6: 598 mtod(m, struct ip6_hdr *)->ip6_plen = 599 htons(m->m_pkthdr.len) - sizeof(struct ip6_hdr); 600 break; 601 #endif /* INET6 */ 602 default: 603 IPCOMP_STATINC(IPCOMP_STAT_NOPF); 604 DPRINTF(("ipcomp_output: unknown/unsupported protocol " 605 "family %d, IPCA %s/%08lx\n", 606 sav->sah->saidx.dst.sa.sa_family, 607 ipsec_address(&sav->sah->saidx.dst), 608 (u_long) ntohl(sav->spi))); 609 error = EPFNOSUPPORT; 610 goto bad; 611 } 612 } else { 613 /* compression was useless, we have lost time */ 614 IPCOMP_STATINC(IPCOMP_STAT_USELESS); 615 DPRINTF(("ipcomp_output_cb: compression was useless : initial size was %d" 616 "and compressed size is %d\n", rlen, crp->crp_olen)); 617 } 618 619 620 /* Release the crypto descriptor */ 621 free(tc, M_XDATA); 622 crypto_freereq(crp); 623 624 /* NB: m is reclaimed by ipsec_process_done. */ 625 error = ipsec_process_done(m, isr); 626 KEY_FREESAV(&sav); 627 splx(s); 628 return error; 629 bad: 630 if (sav) 631 KEY_FREESAV(&sav); 632 splx(s); 633 if (m) 634 m_freem(m); 635 free(tc, M_XDATA); 636 crypto_freereq(crp); 637 return error; 638 } 639 640 static struct xformsw ipcomp_xformsw = { 641 XF_IPCOMP, XFT_COMP, "IPcomp", 642 ipcomp_init, ipcomp_zeroize, ipcomp_input, 643 ipcomp_output, 644 NULL, 645 }; 646 647 INITFN void 648 ipcomp_attach(void) 649 { 650 ipcompstat_percpu = percpu_alloc(sizeof(uint64_t) * IPCOMP_NSTATS); 651 xform_register(&ipcomp_xformsw); 652 } 653 654 #ifdef __FreeBSD__ 655 SYSINIT(ipcomp_xform_init, SI_SUB_DRIVERS, SI_ORDER_FIRST, ipcomp_attach, NULL) 656 #endif /* __FreeBSD__ */ 657