xform_ipcomp.c revision 1.57
1 /* $NetBSD: xform_ipcomp.c,v 1.57 2018/02/15 13:51:32 maxv 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 1.57 2018/02/15 13:51:32 maxv Exp $"); 34 35 /* IP payload compression protocol (IPComp), see RFC 2393 */ 36 #if defined(_KERNEL_OPT) 37 #include "opt_inet.h" 38 #endif 39 40 #include <sys/param.h> 41 #include <sys/systm.h> 42 #include <sys/mbuf.h> 43 #include <sys/socket.h> 44 #include <sys/kernel.h> 45 #include <sys/protosw.h> 46 #include <sys/sysctl.h> 47 #include <sys/pool.h> 48 #include <sys/pserialize.h> 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 <opencrypto/cryptodev.h> 72 #include <opencrypto/deflate.h> 73 #include <opencrypto/xform.h> 74 75 percpu_t *ipcompstat_percpu; 76 77 int ipcomp_enable = 1; 78 79 #ifdef __FreeBSD__ 80 SYSCTL_DECL(_net_inet_ipcomp); 81 SYSCTL_INT(_net_inet_ipcomp, OID_AUTO, 82 ipcomp_enable, CTLFLAG_RW, &ipcomp_enable, 0, ""); 83 SYSCTL_STRUCT(_net_inet_ipcomp, IPSECCTL_STATS, 84 stats, CTLFLAG_RD, &ipcompstat, ipcompstat, ""); 85 #endif /* __FreeBSD__ */ 86 87 static int ipcomp_input_cb(struct cryptop *crp); 88 static int ipcomp_output_cb(struct cryptop *crp); 89 90 const uint8_t ipcomp_stats[256] = { SADB_CALG_STATS_INIT }; 91 92 static pool_cache_t ipcomp_tdb_crypto_pool_cache; 93 94 const struct comp_algo * 95 ipcomp_algorithm_lookup(int alg) 96 { 97 switch (alg) { 98 case SADB_X_CALG_DEFLATE: 99 return &comp_algo_deflate_nogrow; 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, const struct xformsw *xsp) 109 { 110 const 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(("%s: unsupported compression algorithm %d\n", 118 __func__, 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 ses = crypto_newsession(&sav->tdb_cryptoid, &cric, crypto_support); 130 return ses; 131 } 132 133 /* 134 * ipcomp_zeroize() used when IPCA is deleted 135 */ 136 static int 137 ipcomp_zeroize(struct secasvar *sav) 138 { 139 int err; 140 141 err = crypto_freesession(sav->tdb_cryptoid); 142 sav->tdb_cryptoid = 0; 143 return err; 144 } 145 146 /* 147 * ipcomp_input() gets called to uncompress an input packet 148 */ 149 static int 150 ipcomp_input(struct mbuf *m, struct secasvar *sav, int skip, int protoff) 151 { 152 struct tdb_crypto *tc; 153 struct cryptodesc *crdc; 154 struct cryptop *crp; 155 int error, hlen = IPCOMP_HLENGTH, stat = IPCOMP_STAT_CRYPTO; 156 157 IPSEC_SPLASSERT_SOFTNET(__func__); 158 159 /* Get crypto descriptors */ 160 crp = crypto_getreq(1); 161 if (crp == NULL) { 162 DPRINTF(("%s: no crypto descriptors\n", __func__)); 163 error = ENOBUFS; 164 goto error_m; 165 } 166 /* Get IPsec-specific opaque pointer */ 167 tc = pool_cache_get(ipcomp_tdb_crypto_pool_cache, PR_NOWAIT); 168 if (tc == NULL) { 169 DPRINTF(("%s: cannot allocate tdb_crypto\n", __func__)); 170 error = ENOBUFS; 171 goto error_crp; 172 } 173 174 error = m_makewritable(&m, 0, m->m_pkthdr.len, M_NOWAIT); 175 if (error) { 176 DPRINTF(("%s: m_makewritable failed\n", __func__)); 177 goto error_tc; 178 } 179 180 { 181 int s = pserialize_read_enter(); 182 183 /* 184 * Take another reference to the SA for opencrypto callback. 185 */ 186 if (__predict_false(sav->state == SADB_SASTATE_DEAD)) { 187 pserialize_read_exit(s); 188 stat = IPCOMP_STAT_NOTDB; 189 error = ENOENT; 190 goto error_tc; 191 } 192 KEY_SA_REF(sav); 193 pserialize_read_exit(s); 194 } 195 196 crdc = crp->crp_desc; 197 198 crdc->crd_skip = skip + hlen; 199 crdc->crd_len = m->m_pkthdr.len - (skip + hlen); 200 crdc->crd_inject = 0; /* unused */ 201 202 /* Decompression operation */ 203 crdc->crd_alg = sav->tdb_compalgxform->type; 204 205 /* Crypto operation descriptor */ 206 crp->crp_ilen = m->m_pkthdr.len - (skip + hlen); 207 crp->crp_olen = MCLBYTES; /* hint to decompression code */ 208 crp->crp_flags = CRYPTO_F_IMBUF; 209 crp->crp_buf = m; 210 crp->crp_callback = ipcomp_input_cb; 211 crp->crp_sid = sav->tdb_cryptoid; 212 crp->crp_opaque = tc; 213 214 /* These are passed as-is to the callback */ 215 tc->tc_spi = sav->spi; 216 tc->tc_dst = sav->sah->saidx.dst; 217 tc->tc_proto = sav->sah->saidx.proto; 218 tc->tc_protoff = protoff; 219 tc->tc_skip = skip; 220 tc->tc_sav = sav; 221 222 return crypto_dispatch(crp); 223 224 error_tc: 225 pool_cache_put(ipcomp_tdb_crypto_pool_cache, tc); 226 error_crp: 227 crypto_freereq(crp); 228 error_m: 229 m_freem(m); 230 IPCOMP_STATINC(stat); 231 return error; 232 } 233 234 #ifdef INET6 235 #define IPSEC_COMMON_INPUT_CB(m, sav, skip, protoff) do { \ 236 if (saidx->dst.sa.sa_family == AF_INET6) { \ 237 error = ipsec6_common_input_cb(m, sav, skip, protoff); \ 238 } else { \ 239 error = ipsec4_common_input_cb(m, sav, skip, protoff); \ 240 } \ 241 } while (0) 242 #else 243 #define IPSEC_COMMON_INPUT_CB(m, sav, skip, protoff) \ 244 (error = ipsec4_common_input_cb(m, sav, skip, protoff)) 245 #endif 246 247 /* 248 * IPComp input callback from the crypto driver. 249 */ 250 static int 251 ipcomp_input_cb(struct cryptop *crp) 252 { 253 char buf[IPSEC_ADDRSTRLEN]; 254 struct tdb_crypto *tc; 255 int skip, protoff; 256 struct mbuf *m; 257 struct secasvar *sav; 258 struct secasindex *saidx __diagused; 259 int hlen = IPCOMP_HLENGTH, error, clen; 260 uint8_t nproto; 261 struct ipcomp *ipc; 262 uint16_t dport; 263 uint16_t sport; 264 IPSEC_DECLARE_LOCK_VARIABLE; 265 266 KASSERT(crp->crp_opaque != NULL); 267 tc = crp->crp_opaque; 268 skip = tc->tc_skip; 269 protoff = tc->tc_protoff; 270 m = crp->crp_buf; 271 272 /* find the source port for NAT-T */ 273 nat_t_ports_get(m, &dport, &sport); 274 275 IPSEC_ACQUIRE_GLOBAL_LOCKS(); 276 277 sav = tc->tc_sav; 278 saidx = &sav->sah->saidx; 279 KASSERTMSG(saidx->dst.sa.sa_family == AF_INET || 280 saidx->dst.sa.sa_family == AF_INET6, 281 "unexpected protocol family %u", saidx->dst.sa.sa_family); 282 283 /* Check for crypto errors */ 284 if (crp->crp_etype) { 285 /* Reset the session ID */ 286 if (sav->tdb_cryptoid != 0) 287 sav->tdb_cryptoid = crp->crp_sid; 288 289 if (crp->crp_etype == EAGAIN) { 290 KEY_SA_UNREF(&sav); 291 IPSEC_RELEASE_GLOBAL_LOCKS(); 292 return crypto_dispatch(crp); 293 } 294 295 IPCOMP_STATINC(IPCOMP_STAT_NOXFORM); 296 DPRINTF(("%s: crypto error %d\n", __func__, crp->crp_etype)); 297 error = crp->crp_etype; 298 goto bad; 299 } 300 301 IPCOMP_STATINC(IPCOMP_STAT_HIST + ipcomp_stats[sav->alg_comp]); 302 303 /* Update the counters */ 304 IPCOMP_STATADD(IPCOMP_STAT_IBYTES, m->m_pkthdr.len - skip - hlen); 305 306 /* Length of data after processing */ 307 clen = crp->crp_olen; 308 309 /* Release the crypto descriptors */ 310 pool_cache_put(ipcomp_tdb_crypto_pool_cache, tc); 311 tc = NULL; 312 crypto_freereq(crp); 313 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); 320 DPRINTF(("%s: m_pullup failed\n", __func__)); 321 error = EINVAL; 322 goto bad; 323 } 324 325 /* Keep the next protocol field */ 326 ipc = (struct ipcomp *)(mtod(m, uint8_t *) + skip); 327 nproto = ipc->comp_nxt; 328 switch (nproto) { 329 case IPPROTO_IPCOMP: 330 case IPPROTO_AH: 331 case IPPROTO_ESP: 332 IPCOMP_STATINC(IPCOMP_STAT_HDROPS); 333 DPRINTF(("%s: nested ipcomp, IPCA %s/%08lx\n", __func__, 334 ipsec_address(&sav->sah->saidx.dst, buf, sizeof(buf)), 335 (u_long) ntohl(sav->spi))); 336 error = EINVAL; 337 goto bad; 338 default: 339 break; 340 } 341 342 /* Remove the IPCOMP header */ 343 error = m_striphdr(m, skip, hlen); 344 if (error) { 345 IPCOMP_STATINC(IPCOMP_STAT_HDROPS); 346 DPRINTF(("%s: bad mbuf chain, IPCA %s/%08lx\n", __func__, 347 ipsec_address(&sav->sah->saidx.dst, buf, sizeof(buf)), 348 (u_long) ntohl(sav->spi))); 349 goto bad; 350 } 351 352 /* Restore the Next Protocol field */ 353 m_copyback(m, protoff, sizeof(uint8_t), (uint8_t *)&nproto); 354 355 IPSEC_COMMON_INPUT_CB(m, sav, skip, protoff); 356 357 KEY_SA_UNREF(&sav); 358 IPSEC_RELEASE_GLOBAL_LOCKS(); 359 return error; 360 361 bad: 362 if (sav) 363 KEY_SA_UNREF(&sav); 364 IPSEC_RELEASE_GLOBAL_LOCKS(); 365 if (m) 366 m_freem(m); 367 if (tc != NULL) 368 pool_cache_put(ipcomp_tdb_crypto_pool_cache, tc); 369 if (crp) 370 crypto_freereq(crp); 371 return error; 372 } 373 374 /* 375 * IPComp output routine, called by ipsec[46]_process_packet() 376 */ 377 static int 378 ipcomp_output(struct mbuf *m, const struct ipsecrequest *isr, 379 struct secasvar *sav, struct mbuf **mp, int skip, int protoff) 380 { 381 char buf[IPSEC_ADDRSTRLEN]; 382 const struct comp_algo *ipcompx; 383 int error, ralen, hlen, maxpacketsize; 384 struct cryptodesc *crdc; 385 struct cryptop *crp; 386 struct tdb_crypto *tc; 387 388 IPSEC_SPLASSERT_SOFTNET(__func__); 389 KASSERT(sav != NULL); 390 KASSERT(sav->tdb_compalgxform != NULL); 391 ipcompx = sav->tdb_compalgxform; 392 393 /* Raw payload length before comp. */ 394 ralen = m->m_pkthdr.len - skip; 395 396 /* Don't process the packet if it is too short */ 397 if (ralen < ipcompx->minlen) { 398 IPCOMP_STATINC(IPCOMP_STAT_MINLEN); 399 return ipsec_process_done(m, isr, sav); 400 } 401 402 hlen = IPCOMP_HLENGTH; 403 404 IPCOMP_STATINC(IPCOMP_STAT_OUTPUT); 405 406 /* Check for maximum packet size violations. */ 407 switch (sav->sah->saidx.dst.sa.sa_family) { 408 #ifdef INET 409 case AF_INET: 410 maxpacketsize = IP_MAXPACKET; 411 break; 412 #endif 413 #ifdef INET6 414 case AF_INET6: 415 maxpacketsize = IPV6_MAXPACKET; 416 break; 417 #endif 418 default: 419 IPCOMP_STATINC(IPCOMP_STAT_NOPF); 420 DPRINTF(("%s: unknown/unsupported protocol family %d" 421 ", IPCA %s/%08lx\n", __func__, 422 sav->sah->saidx.dst.sa.sa_family, 423 ipsec_address(&sav->sah->saidx.dst, buf, sizeof(buf)), 424 (u_long) ntohl(sav->spi))); 425 error = EPFNOSUPPORT; 426 goto bad; 427 } 428 if (skip + hlen + ralen > maxpacketsize) { 429 IPCOMP_STATINC(IPCOMP_STAT_TOOBIG); 430 DPRINTF(("%s: packet in IPCA %s/%08lx got too big " 431 "(len %u, max len %u)\n", __func__, 432 ipsec_address(&sav->sah->saidx.dst, buf, sizeof(buf)), 433 (u_long) ntohl(sav->spi), 434 skip + hlen + ralen, maxpacketsize)); 435 error = EMSGSIZE; 436 goto bad; 437 } 438 439 /* Update the counters */ 440 IPCOMP_STATADD(IPCOMP_STAT_OBYTES, m->m_pkthdr.len - skip); 441 442 m = m_clone(m); 443 if (m == NULL) { 444 IPCOMP_STATINC(IPCOMP_STAT_HDROPS); 445 DPRINTF(("%s: cannot clone mbuf chain, IPCA %s/%08lx\n", 446 __func__, 447 ipsec_address(&sav->sah->saidx.dst, buf, sizeof(buf)), 448 (u_long) ntohl(sav->spi))); 449 error = ENOBUFS; 450 goto bad; 451 } 452 453 /* Ok now, we can pass to the crypto processing */ 454 455 /* Get crypto descriptors */ 456 crp = crypto_getreq(1); 457 if (crp == NULL) { 458 IPCOMP_STATINC(IPCOMP_STAT_CRYPTO); 459 DPRINTF(("%s: failed to acquire crypto descriptor\n", 460 __func__)); 461 error = ENOBUFS; 462 goto bad; 463 } 464 crdc = crp->crp_desc; 465 466 /* Compression descriptor */ 467 crdc->crd_skip = skip; 468 crdc->crd_len = m->m_pkthdr.len - skip; 469 crdc->crd_flags = CRD_F_COMP; 470 crdc->crd_inject = skip; 471 472 /* Compression operation */ 473 crdc->crd_alg = ipcompx->type; 474 475 /* IPsec-specific opaque crypto info */ 476 tc = pool_cache_get(ipcomp_tdb_crypto_pool_cache, PR_NOWAIT); 477 if (tc == NULL) { 478 IPCOMP_STATINC(IPCOMP_STAT_CRYPTO); 479 DPRINTF(("%s: failed to allocate tdb_crypto\n", __func__)); 480 crypto_freereq(crp); 481 error = ENOBUFS; 482 goto bad; 483 } 484 485 { 486 int s = pserialize_read_enter(); 487 488 /* 489 * Take another reference to the SP and the SA for opencrypto callback. 490 */ 491 if (__predict_false(isr->sp->state == IPSEC_SPSTATE_DEAD || 492 sav->state == SADB_SASTATE_DEAD)) { 493 pserialize_read_exit(s); 494 pool_cache_put(ipcomp_tdb_crypto_pool_cache, tc); 495 crypto_freereq(crp); 496 IPCOMP_STATINC(IPCOMP_STAT_NOTDB); 497 error = ENOENT; 498 goto bad; 499 } 500 KEY_SP_REF(isr->sp); 501 KEY_SA_REF(sav); 502 pserialize_read_exit(s); 503 } 504 505 tc->tc_isr = isr; 506 tc->tc_spi = sav->spi; 507 tc->tc_dst = sav->sah->saidx.dst; 508 tc->tc_proto = sav->sah->saidx.proto; 509 tc->tc_skip = skip; 510 tc->tc_protoff = protoff; 511 tc->tc_sav = sav; 512 513 /* Crypto operation descriptor */ 514 crp->crp_ilen = m->m_pkthdr.len; /* Total input length */ 515 crp->crp_flags = CRYPTO_F_IMBUF; 516 crp->crp_buf = m; 517 crp->crp_callback = ipcomp_output_cb; 518 crp->crp_opaque = tc; 519 crp->crp_sid = sav->tdb_cryptoid; 520 521 return crypto_dispatch(crp); 522 523 bad: 524 if (m) 525 m_freem(m); 526 return error; 527 } 528 529 /* 530 * IPComp output callback from the crypto driver. 531 */ 532 static int 533 ipcomp_output_cb(struct cryptop *crp) 534 { 535 char buf[IPSEC_ADDRSTRLEN]; 536 struct tdb_crypto *tc; 537 const struct ipsecrequest *isr; 538 struct secasvar *sav; 539 struct mbuf *m, *mo; 540 int error, skip, rlen, roff; 541 uint8_t prot; 542 uint16_t cpi; 543 struct ipcomp * ipcomp; 544 IPSEC_DECLARE_LOCK_VARIABLE; 545 546 KASSERT(crp->crp_opaque != NULL); 547 tc = crp->crp_opaque; 548 m = crp->crp_buf; 549 skip = tc->tc_skip; 550 rlen = crp->crp_ilen - skip; 551 552 IPSEC_ACQUIRE_GLOBAL_LOCKS(); 553 554 isr = tc->tc_isr; 555 sav = tc->tc_sav; 556 557 /* Check for crypto errors */ 558 if (crp->crp_etype) { 559 /* Reset session ID */ 560 if (sav->tdb_cryptoid != 0) 561 sav->tdb_cryptoid = crp->crp_sid; 562 563 if (crp->crp_etype == EAGAIN) { 564 IPSEC_RELEASE_GLOBAL_LOCKS(); 565 return crypto_dispatch(crp); 566 } 567 IPCOMP_STATINC(IPCOMP_STAT_NOXFORM); 568 DPRINTF(("%s: crypto error %d\n", __func__, crp->crp_etype)); 569 error = crp->crp_etype; 570 goto bad; 571 } 572 573 IPCOMP_STATINC(IPCOMP_STAT_HIST + ipcomp_stats[sav->alg_comp]); 574 575 if (rlen > crp->crp_olen) { 576 /* Inject IPCOMP header */ 577 mo = m_makespace(m, skip, IPCOMP_HLENGTH, &roff); 578 if (mo == NULL) { 579 IPCOMP_STATINC(IPCOMP_STAT_WRAP); 580 DPRINTF(("%s: failed to inject IPCOMP header for " 581 "IPCA %s/%08lx\n", __func__, 582 ipsec_address(&sav->sah->saidx.dst, buf, 583 sizeof(buf)), (u_long) ntohl(sav->spi))); 584 error = ENOBUFS; 585 goto bad; 586 } 587 ipcomp = (struct ipcomp *)(mtod(mo, char *) + roff); 588 589 /* Initialize the IPCOMP header */ 590 /* XXX alignment always correct? */ 591 switch (sav->sah->saidx.dst.sa.sa_family) { 592 #ifdef INET 593 case AF_INET: 594 ipcomp->comp_nxt = mtod(m, struct ip *)->ip_p; 595 break; 596 #endif 597 #ifdef INET6 598 case AF_INET6: 599 ipcomp->comp_nxt = mtod(m, struct ip6_hdr *)->ip6_nxt; 600 break; 601 #endif 602 } 603 ipcomp->comp_flags = 0; 604 605 if ((sav->flags & SADB_X_EXT_RAWCPI) == 0) 606 cpi = sav->alg_enc; 607 else 608 cpi = ntohl(sav->spi) & 0xffff; 609 ipcomp->comp_cpi = htons(cpi); 610 611 /* Fix Next Protocol in IPv4/IPv6 header */ 612 prot = IPPROTO_IPCOMP; 613 m_copyback(m, tc->tc_protoff, sizeof(uint8_t), (u_char *)&prot); 614 615 /* Adjust the length in the IP header */ 616 switch (sav->sah->saidx.dst.sa.sa_family) { 617 #ifdef INET 618 case AF_INET: 619 mtod(m, struct ip *)->ip_len = htons(m->m_pkthdr.len); 620 break; 621 #endif 622 #ifdef INET6 623 case AF_INET6: 624 mtod(m, struct ip6_hdr *)->ip6_plen = 625 htons(m->m_pkthdr.len) - sizeof(struct ip6_hdr); 626 break; 627 #endif 628 default: 629 IPCOMP_STATINC(IPCOMP_STAT_NOPF); 630 DPRINTF(("ipcomp_output: unknown/unsupported protocol " 631 "family %d, IPCA %s/%08lx\n", 632 sav->sah->saidx.dst.sa.sa_family, 633 ipsec_address(&sav->sah->saidx.dst, buf, 634 sizeof(buf)), (u_long) ntohl(sav->spi))); 635 error = EPFNOSUPPORT; 636 goto bad; 637 } 638 } else { 639 /* compression was useless, we have lost time */ 640 IPCOMP_STATINC(IPCOMP_STAT_USELESS); 641 DPRINTF(("ipcomp_output_cb: compression was useless: initial" 642 "size was %d and compressed size is %d\n", rlen, 643 crp->crp_olen)); 644 } 645 646 /* Release the crypto descriptor */ 647 pool_cache_put(ipcomp_tdb_crypto_pool_cache, tc); 648 crypto_freereq(crp); 649 650 /* NB: m is reclaimed by ipsec_process_done. */ 651 error = ipsec_process_done(m, isr, sav); 652 KEY_SA_UNREF(&sav); 653 KEY_SP_UNREF(&isr->sp); 654 IPSEC_RELEASE_GLOBAL_LOCKS(); 655 return error; 656 657 bad: 658 if (sav) 659 KEY_SA_UNREF(&sav); 660 KEY_SP_UNREF(&isr->sp); 661 IPSEC_RELEASE_GLOBAL_LOCKS(); 662 if (m) 663 m_freem(m); 664 pool_cache_put(ipcomp_tdb_crypto_pool_cache, tc); 665 crypto_freereq(crp); 666 return error; 667 } 668 669 static struct xformsw ipcomp_xformsw = { 670 .xf_type = XF_IPCOMP, 671 .xf_flags = XFT_COMP, 672 .xf_name = "IPcomp", 673 .xf_init = ipcomp_init, 674 .xf_zeroize = ipcomp_zeroize, 675 .xf_input = ipcomp_input, 676 .xf_output = ipcomp_output, 677 .xf_next = NULL, 678 }; 679 680 void 681 ipcomp_attach(void) 682 { 683 ipcompstat_percpu = percpu_alloc(sizeof(uint64_t) * IPCOMP_NSTATS); 684 ipcomp_tdb_crypto_pool_cache = pool_cache_init(sizeof(struct tdb_crypto), 685 coherency_unit, 0, 0, "ipcomp_tdb_crypto", NULL, IPL_SOFTNET, 686 NULL, NULL, NULL); 687 xform_register(&ipcomp_xformsw); 688 } 689
Indexes created Wed Sep 24 02:09:48 GMT 2025