xform_ipcomp.c revision 1.56
1 /* $NetBSD: xform_ipcomp.c,v 1.56 2018/02/15 04:24:32 ozaki-r 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 1.56 2018/02/15 04:24:32 ozaki-r 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 void *addr; 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); 305 306 307 clen = crp->crp_olen; /* Length of data after processing */ 308 309 /* Release the crypto descriptors */ 310 pool_cache_put(ipcomp_tdb_crypto_pool_cache, tc); 311 tc = NULL; 312 crypto_freereq(crp), crp = NULL; 313 314 /* In case it's not done already, adjust the size of the mbuf chain */ 315 m->m_pkthdr.len = clen + hlen + skip; 316 317 if (m->m_len < skip + hlen && (m = m_pullup(m, skip + hlen)) == 0) { 318 IPCOMP_STATINC(IPCOMP_STAT_HDROPS); /*XXX*/ 319 DPRINTF(("%s: m_pullup failed\n", __func__)); 320 error = EINVAL; /*XXX*/ 321 goto bad; 322 } 323 324 /* Keep the next protocol field */ 325 addr = (uint8_t*) mtod(m, struct ip *) + skip; 326 nproto = ((struct ipcomp *) addr)->comp_nxt; 327 switch (nproto) { 328 case IPPROTO_IPCOMP: 329 case IPPROTO_AH: 330 case IPPROTO_ESP: 331 IPCOMP_STATINC(IPCOMP_STAT_HDROPS); 332 DPRINTF(("%s: nested ipcomp, IPCA %s/%08lx\n", __func__, 333 ipsec_address(&sav->sah->saidx.dst, buf, sizeof(buf)), 334 (u_long) ntohl(sav->spi))); 335 error = EINVAL; 336 goto bad; 337 default: 338 break; 339 } 340 341 /* Remove the IPCOMP header */ 342 error = m_striphdr(m, skip, hlen); 343 if (error) { 344 IPCOMP_STATINC(IPCOMP_STAT_HDROPS); 345 DPRINTF(("%s: bad mbuf chain, IPCA %s/%08lx\n", __func__, 346 ipsec_address(&sav->sah->saidx.dst, buf, sizeof(buf)), 347 (u_long) ntohl(sav->spi))); 348 goto bad; 349 } 350 351 /* Restore the Next Protocol field */ 352 m_copyback(m, protoff, sizeof(uint8_t), (uint8_t *) &nproto); 353 354 IPSEC_COMMON_INPUT_CB(m, sav, skip, protoff); 355 356 KEY_SA_UNREF(&sav); 357 IPSEC_RELEASE_GLOBAL_LOCKS(); 358 return error; 359 bad: 360 if (sav) 361 KEY_SA_UNREF(&sav); 362 IPSEC_RELEASE_GLOBAL_LOCKS(); 363 if (m) 364 m_freem(m); 365 if (tc != NULL) 366 pool_cache_put(ipcomp_tdb_crypto_pool_cache, tc); 367 if (crp) 368 crypto_freereq(crp); 369 return error; 370 } 371 372 /* 373 * IPComp output routine, called by ipsec[46]_process_packet() 374 */ 375 static int 376 ipcomp_output( 377 struct mbuf *m, 378 const struct ipsecrequest *isr, 379 struct secasvar *sav, 380 struct mbuf **mp, 381 int skip, 382 int protoff 383 ) 384 { 385 char buf[IPSEC_ADDRSTRLEN]; 386 const struct comp_algo *ipcompx; 387 int error, ralen, hlen, maxpacketsize; 388 struct cryptodesc *crdc; 389 struct cryptop *crp; 390 struct tdb_crypto *tc; 391 392 IPSEC_SPLASSERT_SOFTNET(__func__); 393 KASSERT(sav != NULL); 394 KASSERT(sav->tdb_compalgxform != NULL); 395 ipcompx = sav->tdb_compalgxform; 396 397 ralen = m->m_pkthdr.len - skip; /* Raw payload length before comp. */ 398 399 /* Don't process the packet if it is too short */ 400 if (ralen < ipcompx->minlen) { 401 IPCOMP_STATINC(IPCOMP_STAT_MINLEN); 402 return ipsec_process_done(m, isr, sav); 403 } 404 405 hlen = IPCOMP_HLENGTH; 406 407 IPCOMP_STATINC(IPCOMP_STAT_OUTPUT); 408 409 /* Check for maximum packet size violations. */ 410 switch (sav->sah->saidx.dst.sa.sa_family) { 411 #ifdef INET 412 case AF_INET: 413 maxpacketsize = IP_MAXPACKET; 414 break; 415 #endif /* INET */ 416 #ifdef INET6 417 case AF_INET6: 418 maxpacketsize = IPV6_MAXPACKET; 419 break; 420 #endif /* INET6 */ 421 default: 422 IPCOMP_STATINC(IPCOMP_STAT_NOPF); 423 DPRINTF(("%s: unknown/unsupported protocol family %d" 424 ", IPCA %s/%08lx\n", __func__, 425 sav->sah->saidx.dst.sa.sa_family, 426 ipsec_address(&sav->sah->saidx.dst, buf, sizeof(buf)), 427 (u_long) ntohl(sav->spi))); 428 error = EPFNOSUPPORT; 429 goto bad; 430 } 431 if (skip + hlen + ralen > maxpacketsize) { 432 IPCOMP_STATINC(IPCOMP_STAT_TOOBIG); 433 DPRINTF(("%s: packet in IPCA %s/%08lx got too big " 434 "(len %u, max len %u)\n", __func__, 435 ipsec_address(&sav->sah->saidx.dst, buf, sizeof(buf)), 436 (u_long) ntohl(sav->spi), 437 skip + hlen + ralen, maxpacketsize)); 438 error = EMSGSIZE; 439 goto bad; 440 } 441 442 /* Update the counters */ 443 IPCOMP_STATADD(IPCOMP_STAT_OBYTES, m->m_pkthdr.len - skip); 444 445 m = m_clone(m); 446 if (m == NULL) { 447 IPCOMP_STATINC(IPCOMP_STAT_HDROPS); 448 DPRINTF(("%s: cannot clone mbuf chain, IPCA %s/%08lx\n", 449 __func__, 450 ipsec_address(&sav->sah->saidx.dst, buf, sizeof(buf)), 451 (u_long) ntohl(sav->spi))); 452 error = ENOBUFS; 453 goto bad; 454 } 455 456 /* Ok now, we can pass to the crypto processing */ 457 458 /* Get crypto descriptors */ 459 crp = crypto_getreq(1); 460 if (crp == NULL) { 461 IPCOMP_STATINC(IPCOMP_STAT_CRYPTO); 462 DPRINTF(("%s: failed to acquire crypto descriptor\n", 463 __func__)); 464 error = ENOBUFS; 465 goto bad; 466 } 467 crdc = crp->crp_desc; 468 469 /* Compression descriptor */ 470 crdc->crd_skip = skip; 471 crdc->crd_len = m->m_pkthdr.len - skip; 472 crdc->crd_flags = CRD_F_COMP; 473 crdc->crd_inject = skip; 474 475 /* Compression operation */ 476 crdc->crd_alg = ipcompx->type; 477 478 /* IPsec-specific opaque crypto info */ 479 tc = pool_cache_get(ipcomp_tdb_crypto_pool_cache, PR_NOWAIT); 480 if (tc == NULL) { 481 IPCOMP_STATINC(IPCOMP_STAT_CRYPTO); 482 DPRINTF(("%s: failed to allocate tdb_crypto\n", __func__)); 483 crypto_freereq(crp); 484 error = ENOBUFS; 485 goto bad; 486 } 487 488 { 489 int s = pserialize_read_enter(); 490 491 /* 492 * Take another reference to the SP and the SA for opencrypto callback. 493 */ 494 if (__predict_false(isr->sp->state == IPSEC_SPSTATE_DEAD || 495 sav->state == SADB_SASTATE_DEAD)) { 496 pserialize_read_exit(s); 497 pool_cache_put(ipcomp_tdb_crypto_pool_cache, tc); 498 crypto_freereq(crp); 499 IPCOMP_STATINC(IPCOMP_STAT_NOTDB); 500 error = ENOENT; 501 goto bad; 502 } 503 KEY_SP_REF(isr->sp); 504 KEY_SA_REF(sav); 505 pserialize_read_exit(s); 506 } 507 508 tc->tc_isr = isr; 509 tc->tc_spi = sav->spi; 510 tc->tc_dst = sav->sah->saidx.dst; 511 tc->tc_proto = sav->sah->saidx.proto; 512 tc->tc_skip = skip; 513 tc->tc_protoff = protoff; 514 tc->tc_sav = sav; 515 516 /* Crypto operation descriptor */ 517 crp->crp_ilen = m->m_pkthdr.len; /* Total input length */ 518 crp->crp_flags = CRYPTO_F_IMBUF; 519 crp->crp_buf = m; 520 crp->crp_callback = ipcomp_output_cb; 521 crp->crp_opaque = tc; 522 crp->crp_sid = sav->tdb_cryptoid; 523 524 return crypto_dispatch(crp); 525 bad: 526 if (m) 527 m_freem(m); 528 return (error); 529 } 530 531 /* 532 * IPComp output callback from the crypto driver. 533 */ 534 static int 535 ipcomp_output_cb(struct cryptop *crp) 536 { 537 char buf[IPSEC_ADDRSTRLEN]; 538 struct tdb_crypto *tc; 539 const struct ipsecrequest *isr; 540 struct secasvar *sav; 541 struct mbuf *m, *mo; 542 int error, skip, rlen, roff; 543 uint8_t prot; 544 uint16_t cpi; 545 struct ipcomp * ipcomp; 546 IPSEC_DECLARE_LOCK_VARIABLE; 547 548 KASSERT(crp->crp_opaque != NULL); 549 tc = crp->crp_opaque; 550 m = crp->crp_buf; 551 skip = tc->tc_skip; 552 rlen = crp->crp_ilen - skip; 553 554 IPSEC_ACQUIRE_GLOBAL_LOCKS(); 555 556 isr = tc->tc_isr; 557 sav = tc->tc_sav; 558 559 /* Check for crypto errors */ 560 if (crp->crp_etype) { 561 /* Reset session ID */ 562 if (sav->tdb_cryptoid != 0) 563 sav->tdb_cryptoid = crp->crp_sid; 564 565 if (crp->crp_etype == EAGAIN) { 566 IPSEC_RELEASE_GLOBAL_LOCKS(); 567 return crypto_dispatch(crp); 568 } 569 IPCOMP_STATINC(IPCOMP_STAT_NOXFORM); 570 DPRINTF(("%s: crypto error %d\n", __func__, crp->crp_etype)); 571 error = crp->crp_etype; 572 goto bad; 573 } 574 575 IPCOMP_STATINC(IPCOMP_STAT_HIST + ipcomp_stats[sav->alg_comp]); 576 577 if (rlen > crp->crp_olen) { 578 /* Inject IPCOMP header */ 579 mo = m_makespace(m, skip, IPCOMP_HLENGTH, &roff); 580 if (mo == NULL) { 581 IPCOMP_STATINC(IPCOMP_STAT_WRAP); 582 DPRINTF(("%s: failed to inject IPCOMP header for " 583 "IPCA %s/%08lx\n", __func__, 584 ipsec_address(&sav->sah->saidx.dst, buf, 585 sizeof(buf)), (u_long) ntohl(sav->spi))); 586 error = ENOBUFS; 587 goto bad; 588 } 589 ipcomp = (struct ipcomp *)(mtod(mo, char *) + roff); 590 591 /* Initialize the IPCOMP header */ 592 /* XXX alignment always correct? */ 593 switch (sav->sah->saidx.dst.sa.sa_family) { 594 #ifdef INET 595 case AF_INET: 596 ipcomp->comp_nxt = mtod(m, struct ip *)->ip_p; 597 break; 598 #endif /* INET */ 599 #ifdef INET6 600 case AF_INET6: 601 ipcomp->comp_nxt = mtod(m, struct ip6_hdr *)->ip6_nxt; 602 break; 603 #endif 604 } 605 ipcomp->comp_flags = 0; 606 607 if ((sav->flags & SADB_X_EXT_RAWCPI) == 0) 608 cpi = sav->alg_enc; 609 else 610 cpi = ntohl(sav->spi) & 0xffff; 611 ipcomp->comp_cpi = htons(cpi); 612 613 /* Fix Next Protocol in IPv4/IPv6 header */ 614 prot = IPPROTO_IPCOMP; 615 m_copyback(m, tc->tc_protoff, sizeof(uint8_t), (u_char *)&prot); 616 617 /* Adjust the length in the IP header */ 618 switch (sav->sah->saidx.dst.sa.sa_family) { 619 #ifdef INET 620 case AF_INET: 621 mtod(m, struct ip *)->ip_len = htons(m->m_pkthdr.len); 622 break; 623 #endif /* INET */ 624 #ifdef INET6 625 case AF_INET6: 626 mtod(m, struct ip6_hdr *)->ip6_plen = 627 htons(m->m_pkthdr.len) - sizeof(struct ip6_hdr); 628 break; 629 #endif /* INET6 */ 630 default: 631 IPCOMP_STATINC(IPCOMP_STAT_NOPF); 632 DPRINTF(("ipcomp_output: unknown/unsupported protocol " 633 "family %d, IPCA %s/%08lx\n", 634 sav->sah->saidx.dst.sa.sa_family, 635 ipsec_address(&sav->sah->saidx.dst, buf, 636 sizeof(buf)), (u_long) ntohl(sav->spi))); 637 error = EPFNOSUPPORT; 638 goto bad; 639 } 640 } else { 641 /* compression was useless, we have lost time */ 642 IPCOMP_STATINC(IPCOMP_STAT_USELESS); 643 DPRINTF(("ipcomp_output_cb: compression was useless : initial size was %d" 644 "and compressed size is %d\n", rlen, crp->crp_olen)); 645 } 646 647 648 /* Release the crypto descriptor */ 649 pool_cache_put(ipcomp_tdb_crypto_pool_cache, tc); 650 crypto_freereq(crp); 651 652 /* NB: m is reclaimed by ipsec_process_done. */ 653 error = ipsec_process_done(m, isr, sav); 654 KEY_SA_UNREF(&sav); 655 KEY_SP_UNREF(&isr->sp); 656 IPSEC_RELEASE_GLOBAL_LOCKS(); 657 return error; 658 bad: 659 if (sav) 660 KEY_SA_UNREF(&sav); 661 KEY_SP_UNREF(&isr->sp); 662 IPSEC_RELEASE_GLOBAL_LOCKS(); 663 if (m) 664 m_freem(m); 665 pool_cache_put(ipcomp_tdb_crypto_pool_cache, tc); 666 crypto_freereq(crp); 667 return error; 668 } 669 670 static struct xformsw ipcomp_xformsw = { 671 .xf_type = XF_IPCOMP, 672 .xf_flags = XFT_COMP, 673 .xf_name = "IPcomp", 674 .xf_init = ipcomp_init, 675 .xf_zeroize = ipcomp_zeroize, 676 .xf_input = ipcomp_input, 677 .xf_output = ipcomp_output, 678 .xf_next = NULL, 679 }; 680 681 void 682 ipcomp_attach(void) 683 { 684 ipcompstat_percpu = percpu_alloc(sizeof(uint64_t) * IPCOMP_NSTATS); 685 ipcomp_tdb_crypto_pool_cache = pool_cache_init(sizeof(struct tdb_crypto), 686 coherency_unit, 0, 0, "ipcomp_tdb_crypto", NULL, IPL_SOFTNET, 687 NULL, NULL, NULL); 688 xform_register(&ipcomp_xformsw); 689 } 690
Indexes created Tue Sep 30 20:09:53 GMT 2025