xform_ipcomp.c revision 1.62
1 /* $NetBSD: xform_ipcomp.c,v 1.62 2018/04/19 08:27:39 maxv Exp $ */ 2 /* $FreeBSD: 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 1.62 2018/04/19 08:27:39 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 static int ipcomp_input_cb(struct cryptop *crp); 80 static int ipcomp_output_cb(struct cryptop *crp); 81 82 const uint8_t ipcomp_stats[256] = { SADB_CALG_STATS_INIT }; 83 84 static pool_cache_t ipcomp_tdb_crypto_pool_cache; 85 86 const struct comp_algo * 87 ipcomp_algorithm_lookup(int alg) 88 { 89 switch (alg) { 90 case SADB_X_CALG_DEFLATE: 91 return &comp_algo_deflate_nogrow; 92 } 93 return NULL; 94 } 95 96 /* 97 * ipcomp_init() is called when an CPI is being set up. 98 */ 99 static int 100 ipcomp_init(struct secasvar *sav, const struct xformsw *xsp) 101 { 102 const struct comp_algo *tcomp; 103 struct cryptoini cric; 104 int ses; 105 106 /* NB: algorithm really comes in alg_enc and not alg_comp! */ 107 tcomp = ipcomp_algorithm_lookup(sav->alg_enc); 108 if (tcomp == NULL) { 109 DPRINTF(("%s: unsupported compression algorithm %d\n", 110 __func__, sav->alg_comp)); 111 return EINVAL; 112 } 113 sav->alg_comp = sav->alg_enc; /* set for doing histogram */ 114 sav->tdb_xform = xsp; 115 sav->tdb_compalgxform = tcomp; 116 117 /* Initialize crypto session */ 118 memset(&cric, 0, sizeof(cric)); 119 cric.cri_alg = sav->tdb_compalgxform->type; 120 121 ses = crypto_newsession(&sav->tdb_cryptoid, &cric, crypto_support); 122 return ses; 123 } 124 125 /* 126 * ipcomp_zeroize() used when IPCA is deleted 127 */ 128 static int 129 ipcomp_zeroize(struct secasvar *sav) 130 { 131 int err; 132 133 err = crypto_freesession(sav->tdb_cryptoid); 134 sav->tdb_cryptoid = 0; 135 return err; 136 } 137 138 /* 139 * ipcomp_input() gets called to uncompress an input packet 140 */ 141 static int 142 ipcomp_input(struct mbuf *m, struct secasvar *sav, int skip, int protoff) 143 { 144 struct tdb_crypto *tc; 145 struct cryptodesc *crdc; 146 struct cryptop *crp; 147 int error, hlen = IPCOMP_HLENGTH, stat = IPCOMP_STAT_CRYPTO; 148 149 IPSEC_SPLASSERT_SOFTNET(__func__); 150 KASSERT(skip + hlen <= m->m_pkthdr.len); 151 152 /* Get crypto descriptors */ 153 crp = crypto_getreq(1); 154 if (crp == NULL) { 155 DPRINTF(("%s: no crypto descriptors\n", __func__)); 156 error = ENOBUFS; 157 goto error_m; 158 } 159 /* Get IPsec-specific opaque pointer */ 160 tc = pool_cache_get(ipcomp_tdb_crypto_pool_cache, PR_NOWAIT); 161 if (tc == NULL) { 162 DPRINTF(("%s: cannot allocate tdb_crypto\n", __func__)); 163 error = ENOBUFS; 164 goto error_crp; 165 } 166 167 error = m_makewritable(&m, 0, m->m_pkthdr.len, M_NOWAIT); 168 if (error) { 169 DPRINTF(("%s: m_makewritable failed\n", __func__)); 170 goto error_tc; 171 } 172 173 { 174 int s = pserialize_read_enter(); 175 176 /* 177 * Take another reference to the SA for opencrypto callback. 178 */ 179 if (__predict_false(sav->state == SADB_SASTATE_DEAD)) { 180 pserialize_read_exit(s); 181 stat = IPCOMP_STAT_NOTDB; 182 error = ENOENT; 183 goto error_tc; 184 } 185 KEY_SA_REF(sav); 186 pserialize_read_exit(s); 187 } 188 189 crdc = crp->crp_desc; 190 191 crdc->crd_skip = skip + hlen; 192 crdc->crd_len = m->m_pkthdr.len - (skip + hlen); 193 crdc->crd_inject = 0; /* unused */ 194 195 /* Decompression operation */ 196 crdc->crd_alg = sav->tdb_compalgxform->type; 197 198 /* Crypto operation descriptor */ 199 crp->crp_ilen = m->m_pkthdr.len - (skip + hlen); 200 crp->crp_olen = MCLBYTES; /* hint to decompression code */ 201 crp->crp_flags = CRYPTO_F_IMBUF; 202 crp->crp_buf = m; 203 crp->crp_callback = ipcomp_input_cb; 204 crp->crp_sid = sav->tdb_cryptoid; 205 crp->crp_opaque = tc; 206 207 /* These are passed as-is to the callback */ 208 tc->tc_spi = sav->spi; 209 tc->tc_dst = sav->sah->saidx.dst; 210 tc->tc_proto = sav->sah->saidx.proto; 211 tc->tc_protoff = protoff; 212 tc->tc_skip = skip; 213 tc->tc_sav = sav; 214 215 return crypto_dispatch(crp); 216 217 error_tc: 218 pool_cache_put(ipcomp_tdb_crypto_pool_cache, tc); 219 error_crp: 220 crypto_freereq(crp); 221 error_m: 222 m_freem(m); 223 IPCOMP_STATINC(stat); 224 return error; 225 } 226 227 #ifdef INET6 228 #define IPSEC_COMMON_INPUT_CB(m, sav, skip, protoff) do { \ 229 if (saidx->dst.sa.sa_family == AF_INET6) { \ 230 error = ipsec6_common_input_cb(m, sav, skip, protoff); \ 231 } else { \ 232 error = ipsec4_common_input_cb(m, sav, skip, protoff); \ 233 } \ 234 } while (0) 235 #else 236 #define IPSEC_COMMON_INPUT_CB(m, sav, skip, protoff) \ 237 (error = ipsec4_common_input_cb(m, sav, skip, protoff)) 238 #endif 239 240 /* 241 * IPComp input callback from the crypto driver. 242 */ 243 static int 244 ipcomp_input_cb(struct cryptop *crp) 245 { 246 char buf[IPSEC_ADDRSTRLEN]; 247 struct tdb_crypto *tc; 248 int skip, protoff; 249 struct mbuf *m; 250 struct secasvar *sav; 251 struct secasindex *saidx __diagused; 252 int hlen = IPCOMP_HLENGTH, error, clen; 253 uint8_t nproto; 254 struct ipcomp *ipc; 255 uint16_t dport; 256 uint16_t sport; 257 IPSEC_DECLARE_LOCK_VARIABLE; 258 259 KASSERT(crp->crp_opaque != NULL); 260 tc = crp->crp_opaque; 261 skip = tc->tc_skip; 262 protoff = tc->tc_protoff; 263 m = crp->crp_buf; 264 265 /* find the source port for NAT-T */ 266 nat_t_ports_get(m, &dport, &sport); 267 268 IPSEC_ACQUIRE_GLOBAL_LOCKS(); 269 270 sav = tc->tc_sav; 271 saidx = &sav->sah->saidx; 272 KASSERTMSG(saidx->dst.sa.sa_family == AF_INET || 273 saidx->dst.sa.sa_family == AF_INET6, 274 "unexpected protocol family %u", 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_SA_UNREF(&sav); 284 IPSEC_RELEASE_GLOBAL_LOCKS(); 285 return crypto_dispatch(crp); 286 } 287 288 IPCOMP_STATINC(IPCOMP_STAT_NOXFORM); 289 DPRINTF(("%s: crypto error %d\n", __func__, crp->crp_etype)); 290 error = crp->crp_etype; 291 goto bad; 292 } 293 294 IPCOMP_STATINC(IPCOMP_STAT_HIST + ipcomp_stats[sav->alg_comp]); 295 296 /* Update the counters */ 297 IPCOMP_STATADD(IPCOMP_STAT_IBYTES, m->m_pkthdr.len - skip - hlen); 298 299 /* Length of data after processing */ 300 clen = crp->crp_olen; 301 302 /* Release the crypto descriptors */ 303 pool_cache_put(ipcomp_tdb_crypto_pool_cache, tc); 304 tc = NULL; 305 crypto_freereq(crp); 306 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 /* 312 * Get the next protocol field. 313 * 314 * XXX: Really, we should use m_copydata instead of m_pullup. 315 */ 316 if (m->m_len < skip + hlen && (m = m_pullup(m, skip + hlen)) == 0) { 317 IPCOMP_STATINC(IPCOMP_STAT_HDROPS); 318 DPRINTF(("%s: m_pullup failed\n", __func__)); 319 error = EINVAL; 320 goto bad; 321 } 322 ipc = (struct ipcomp *)(mtod(m, uint8_t *) + skip); 323 nproto = ipc->comp_nxt; 324 325 switch (nproto) { 326 case IPPROTO_IPCOMP: 327 case IPPROTO_AH: 328 case IPPROTO_ESP: 329 IPCOMP_STATINC(IPCOMP_STAT_HDROPS); 330 DPRINTF(("%s: nested ipcomp, IPCA %s/%08lx\n", __func__, 331 ipsec_address(&sav->sah->saidx.dst, buf, sizeof(buf)), 332 (u_long) ntohl(sav->spi))); 333 error = EINVAL; 334 goto bad; 335 default: 336 break; 337 } 338 339 /* Remove the IPCOMP header */ 340 error = m_striphdr(m, skip, hlen); 341 if (error) { 342 IPCOMP_STATINC(IPCOMP_STAT_HDROPS); 343 DPRINTF(("%s: bad mbuf chain, IPCA %s/%08lx\n", __func__, 344 ipsec_address(&sav->sah->saidx.dst, buf, sizeof(buf)), 345 (u_long) ntohl(sav->spi))); 346 goto bad; 347 } 348 349 /* Restore the Next Protocol field */ 350 m_copyback(m, protoff, sizeof(nproto), &nproto); 351 352 IPSEC_COMMON_INPUT_CB(m, sav, skip, protoff); 353 354 KEY_SA_UNREF(&sav); 355 IPSEC_RELEASE_GLOBAL_LOCKS(); 356 return error; 357 358 bad: 359 if (sav) 360 KEY_SA_UNREF(&sav); 361 IPSEC_RELEASE_GLOBAL_LOCKS(); 362 if (m) 363 m_freem(m); 364 if (tc != NULL) 365 pool_cache_put(ipcomp_tdb_crypto_pool_cache, tc); 366 if (crp) 367 crypto_freereq(crp); 368 return error; 369 } 370 371 /* 372 * IPComp output routine, called by ipsec[46]_process_packet() 373 */ 374 static int 375 ipcomp_output(struct mbuf *m, const struct ipsecrequest *isr, 376 struct secasvar *sav, struct mbuf **mp, int skip, int protoff) 377 { 378 char buf[IPSEC_ADDRSTRLEN]; 379 const struct comp_algo *ipcompx; 380 int error, ralen, hlen, maxpacketsize; 381 struct cryptodesc *crdc; 382 struct cryptop *crp; 383 struct tdb_crypto *tc; 384 385 IPSEC_SPLASSERT_SOFTNET(__func__); 386 KASSERT(sav != NULL); 387 KASSERT(sav->tdb_compalgxform != NULL); 388 ipcompx = sav->tdb_compalgxform; 389 390 /* Raw payload length before comp. */ 391 ralen = m->m_pkthdr.len - skip; 392 393 /* Don't process the packet if it is too short */ 394 if (ralen < ipcompx->minlen) { 395 IPCOMP_STATINC(IPCOMP_STAT_MINLEN); 396 return ipsec_process_done(m, isr, sav); 397 } 398 399 hlen = IPCOMP_HLENGTH; 400 401 IPCOMP_STATINC(IPCOMP_STAT_OUTPUT); 402 403 /* Check for maximum packet size violations. */ 404 switch (sav->sah->saidx.dst.sa.sa_family) { 405 #ifdef INET 406 case AF_INET: 407 maxpacketsize = IP_MAXPACKET; 408 break; 409 #endif 410 #ifdef INET6 411 case AF_INET6: 412 maxpacketsize = IPV6_MAXPACKET; 413 break; 414 #endif 415 default: 416 IPCOMP_STATINC(IPCOMP_STAT_NOPF); 417 DPRINTF(("%s: unknown/unsupported protocol family %d" 418 ", IPCA %s/%08lx\n", __func__, 419 sav->sah->saidx.dst.sa.sa_family, 420 ipsec_address(&sav->sah->saidx.dst, buf, sizeof(buf)), 421 (u_long) ntohl(sav->spi))); 422 error = EPFNOSUPPORT; 423 goto bad; 424 } 425 if (skip + hlen + ralen > maxpacketsize) { 426 IPCOMP_STATINC(IPCOMP_STAT_TOOBIG); 427 DPRINTF(("%s: packet in IPCA %s/%08lx got too big " 428 "(len %u, max len %u)\n", __func__, 429 ipsec_address(&sav->sah->saidx.dst, buf, sizeof(buf)), 430 (u_long) ntohl(sav->spi), 431 skip + hlen + ralen, maxpacketsize)); 432 error = EMSGSIZE; 433 goto bad; 434 } 435 436 /* Update the counters */ 437 IPCOMP_STATADD(IPCOMP_STAT_OBYTES, m->m_pkthdr.len - skip); 438 439 m = m_clone(m); 440 if (m == NULL) { 441 IPCOMP_STATINC(IPCOMP_STAT_HDROPS); 442 DPRINTF(("%s: cannot clone mbuf chain, IPCA %s/%08lx\n", 443 __func__, 444 ipsec_address(&sav->sah->saidx.dst, buf, sizeof(buf)), 445 (u_long) ntohl(sav->spi))); 446 error = ENOBUFS; 447 goto bad; 448 } 449 450 /* Ok now, we can pass to the crypto processing */ 451 452 /* Get crypto descriptors */ 453 crp = crypto_getreq(1); 454 if (crp == NULL) { 455 IPCOMP_STATINC(IPCOMP_STAT_CRYPTO); 456 DPRINTF(("%s: failed to acquire crypto descriptor\n", 457 __func__)); 458 error = ENOBUFS; 459 goto bad; 460 } 461 crdc = crp->crp_desc; 462 463 /* Compression descriptor */ 464 crdc->crd_skip = skip; 465 crdc->crd_len = m->m_pkthdr.len - skip; 466 crdc->crd_flags = CRD_F_COMP; 467 crdc->crd_inject = skip; 468 469 /* Compression operation */ 470 crdc->crd_alg = ipcompx->type; 471 472 /* IPsec-specific opaque crypto info */ 473 tc = pool_cache_get(ipcomp_tdb_crypto_pool_cache, PR_NOWAIT); 474 if (tc == NULL) { 475 IPCOMP_STATINC(IPCOMP_STAT_CRYPTO); 476 DPRINTF(("%s: failed to allocate tdb_crypto\n", __func__)); 477 crypto_freereq(crp); 478 error = ENOBUFS; 479 goto bad; 480 } 481 482 { 483 int s = pserialize_read_enter(); 484 485 /* 486 * Take another reference to the SP and the SA for opencrypto callback. 487 */ 488 if (__predict_false(isr->sp->state == IPSEC_SPSTATE_DEAD || 489 sav->state == SADB_SASTATE_DEAD)) { 490 pserialize_read_exit(s); 491 pool_cache_put(ipcomp_tdb_crypto_pool_cache, tc); 492 crypto_freereq(crp); 493 IPCOMP_STATINC(IPCOMP_STAT_NOTDB); 494 error = ENOENT; 495 goto bad; 496 } 497 KEY_SP_REF(isr->sp); 498 KEY_SA_REF(sav); 499 pserialize_read_exit(s); 500 } 501 502 tc->tc_isr = isr; 503 tc->tc_spi = sav->spi; 504 tc->tc_dst = sav->sah->saidx.dst; 505 tc->tc_proto = sav->sah->saidx.proto; 506 tc->tc_skip = skip; 507 tc->tc_protoff = protoff; 508 tc->tc_sav = sav; 509 510 /* Crypto operation descriptor */ 511 crp->crp_ilen = m->m_pkthdr.len; /* Total input length */ 512 crp->crp_flags = CRYPTO_F_IMBUF; 513 crp->crp_buf = m; 514 crp->crp_callback = ipcomp_output_cb; 515 crp->crp_opaque = tc; 516 crp->crp_sid = sav->tdb_cryptoid; 517 518 return crypto_dispatch(crp); 519 520 bad: 521 if (m) 522 m_freem(m); 523 return error; 524 } 525 526 /* 527 * IPComp output callback from the crypto driver. 528 */ 529 static int 530 ipcomp_output_cb(struct cryptop *crp) 531 { 532 char buf[IPSEC_ADDRSTRLEN]; 533 struct tdb_crypto *tc; 534 const struct ipsecrequest *isr; 535 struct secasvar *sav; 536 struct mbuf *m, *mo; 537 int error, skip, rlen, roff; 538 uint8_t prot; 539 uint16_t cpi; 540 struct ipcomp * ipcomp; 541 IPSEC_DECLARE_LOCK_VARIABLE; 542 543 KASSERT(crp->crp_opaque != NULL); 544 tc = crp->crp_opaque; 545 m = crp->crp_buf; 546 skip = tc->tc_skip; 547 rlen = crp->crp_ilen - skip; 548 549 IPSEC_ACQUIRE_GLOBAL_LOCKS(); 550 551 isr = tc->tc_isr; 552 sav = tc->tc_sav; 553 554 /* Check for crypto errors */ 555 if (crp->crp_etype) { 556 /* Reset session ID */ 557 if (sav->tdb_cryptoid != 0) 558 sav->tdb_cryptoid = crp->crp_sid; 559 560 if (crp->crp_etype == EAGAIN) { 561 IPSEC_RELEASE_GLOBAL_LOCKS(); 562 return crypto_dispatch(crp); 563 } 564 IPCOMP_STATINC(IPCOMP_STAT_NOXFORM); 565 DPRINTF(("%s: crypto error %d\n", __func__, crp->crp_etype)); 566 error = crp->crp_etype; 567 goto bad; 568 } 569 570 IPCOMP_STATINC(IPCOMP_STAT_HIST + ipcomp_stats[sav->alg_comp]); 571 572 if (rlen > crp->crp_olen) { 573 /* Inject IPCOMP header */ 574 mo = m_makespace(m, skip, IPCOMP_HLENGTH, &roff); 575 if (mo == NULL) { 576 IPCOMP_STATINC(IPCOMP_STAT_WRAP); 577 DPRINTF(("%s: failed to inject IPCOMP header for " 578 "IPCA %s/%08lx\n", __func__, 579 ipsec_address(&sav->sah->saidx.dst, buf, 580 sizeof(buf)), (u_long) ntohl(sav->spi))); 581 error = ENOBUFS; 582 goto bad; 583 } 584 ipcomp = (struct ipcomp *)(mtod(mo, char *) + roff); 585 586 /* Initialize the IPCOMP header */ 587 /* XXX alignment always correct? */ 588 switch (sav->sah->saidx.dst.sa.sa_family) { 589 #ifdef INET 590 case AF_INET: 591 ipcomp->comp_nxt = mtod(m, struct ip *)->ip_p; 592 break; 593 #endif 594 #ifdef INET6 595 case AF_INET6: 596 ipcomp->comp_nxt = mtod(m, struct ip6_hdr *)->ip6_nxt; 597 break; 598 #endif 599 } 600 ipcomp->comp_flags = 0; 601 602 if ((sav->flags & SADB_X_EXT_RAWCPI) == 0) 603 cpi = sav->alg_enc; 604 else 605 cpi = ntohl(sav->spi) & 0xffff; 606 ipcomp->comp_cpi = htons(cpi); 607 608 /* Fix Next Protocol in IPv4/IPv6 header */ 609 prot = IPPROTO_IPCOMP; 610 m_copyback(m, tc->tc_protoff, sizeof(prot), &prot); 611 612 /* Adjust the length in the IP header */ 613 switch (sav->sah->saidx.dst.sa.sa_family) { 614 #ifdef INET 615 case AF_INET: 616 mtod(m, struct ip *)->ip_len = htons(m->m_pkthdr.len); 617 break; 618 #endif 619 #ifdef INET6 620 case AF_INET6: 621 mtod(m, struct ip6_hdr *)->ip6_plen = 622 htons(m->m_pkthdr.len - sizeof(struct ip6_hdr)); 623 break; 624 #endif 625 default: 626 IPCOMP_STATINC(IPCOMP_STAT_NOPF); 627 DPRINTF(("ipcomp_output: unknown/unsupported protocol " 628 "family %d, IPCA %s/%08lx\n", 629 sav->sah->saidx.dst.sa.sa_family, 630 ipsec_address(&sav->sah->saidx.dst, buf, 631 sizeof(buf)), (u_long) ntohl(sav->spi))); 632 error = EPFNOSUPPORT; 633 goto bad; 634 } 635 } else { 636 /* compression was useless, we have lost time */ 637 IPCOMP_STATINC(IPCOMP_STAT_USELESS); 638 DPRINTF(("ipcomp_output_cb: compression was useless: initial" 639 "size was %d and compressed size is %d\n", rlen, 640 crp->crp_olen)); 641 } 642 643 /* Release the crypto descriptor */ 644 pool_cache_put(ipcomp_tdb_crypto_pool_cache, tc); 645 crypto_freereq(crp); 646 647 /* NB: m is reclaimed by ipsec_process_done. */ 648 error = ipsec_process_done(m, isr, sav); 649 KEY_SA_UNREF(&sav); 650 KEY_SP_UNREF(&isr->sp); 651 IPSEC_RELEASE_GLOBAL_LOCKS(); 652 return error; 653 654 bad: 655 if (sav) 656 KEY_SA_UNREF(&sav); 657 KEY_SP_UNREF(&isr->sp); 658 IPSEC_RELEASE_GLOBAL_LOCKS(); 659 if (m) 660 m_freem(m); 661 pool_cache_put(ipcomp_tdb_crypto_pool_cache, tc); 662 crypto_freereq(crp); 663 return error; 664 } 665 666 static struct xformsw ipcomp_xformsw = { 667 .xf_type = XF_IPCOMP, 668 .xf_flags = XFT_COMP, 669 .xf_name = "IPcomp", 670 .xf_init = ipcomp_init, 671 .xf_zeroize = ipcomp_zeroize, 672 .xf_input = ipcomp_input, 673 .xf_output = ipcomp_output, 674 .xf_next = NULL, 675 }; 676 677 void 678 ipcomp_attach(void) 679 { 680 ipcompstat_percpu = percpu_alloc(sizeof(uint64_t) * IPCOMP_NSTATS); 681 ipcomp_tdb_crypto_pool_cache = pool_cache_init(sizeof(struct tdb_crypto), 682 coherency_unit, 0, 0, "ipcomp_tdb_crypto", NULL, IPL_SOFTNET, 683 NULL, NULL, NULL); 684 xform_register(&ipcomp_xformsw); 685 } 686
Indexes created Tue Sep 23 22:09:46 GMT 2025