xform_ipcomp.c revision 1.70
1 /* $NetBSD: xform_ipcomp.c,v 1.70 2022/05/22 11:30:40 riastradh 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 1.70 2022/05/22 11:30:40 riastradh 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 74 percpu_t *ipcompstat_percpu; 75 76 int ipcomp_enable = 1; 77 78 static void ipcomp_input_cb(struct cryptop *crp); 79 static void ipcomp_output_cb(struct cryptop *crp); 80 81 const uint8_t ipcomp_stats[256] = { SADB_CALG_STATS_INIT }; 82 83 static pool_cache_t ipcomp_tdb_crypto_pool_cache; 84 85 const struct comp_algo * 86 ipcomp_algorithm_lookup(int alg) 87 { 88 switch (alg) { 89 case SADB_X_CALG_DEFLATE: 90 return &comp_algo_deflate_nogrow; 91 } 92 return NULL; 93 } 94 95 /* 96 * ipcomp_init() is called when an CPI is being set up. 97 */ 98 static int 99 ipcomp_init(struct secasvar *sav, const struct xformsw *xsp) 100 { 101 const struct comp_algo *tcomp; 102 struct cryptoini cric; 103 int ses; 104 105 /* NB: algorithm really comes in alg_enc and not alg_comp! */ 106 tcomp = ipcomp_algorithm_lookup(sav->alg_enc); 107 if (tcomp == NULL) { 108 DPRINTF("unsupported compression algorithm %d\n", 109 sav->alg_comp); 110 return EINVAL; 111 } 112 sav->alg_comp = sav->alg_enc; /* set for doing histogram */ 113 sav->tdb_xform = xsp; 114 sav->tdb_compalgxform = tcomp; 115 116 /* Initialize crypto session */ 117 memset(&cric, 0, sizeof(cric)); 118 cric.cri_alg = sav->tdb_compalgxform->type; 119 120 ses = crypto_newsession(&sav->tdb_cryptoid, &cric, crypto_support); 121 return ses; 122 } 123 124 /* 125 * ipcomp_zeroize() used when IPCA is deleted 126 */ 127 static int 128 ipcomp_zeroize(struct secasvar *sav) 129 { 130 int err; 131 132 err = crypto_freesession(sav->tdb_cryptoid); 133 sav->tdb_cryptoid = 0; 134 return err; 135 } 136 137 /* 138 * ipcomp_input() gets called to uncompress an input packet 139 */ 140 static int 141 ipcomp_input(struct mbuf *m, struct secasvar *sav, int skip, int protoff) 142 { 143 struct tdb_crypto *tc; 144 struct cryptodesc *crdc; 145 struct cryptop *crp; 146 int error, hlen = IPCOMP_HLENGTH, stat = IPCOMP_STAT_CRYPTO; 147 148 KASSERT(skip + hlen <= m->m_pkthdr.len); 149 150 /* Get crypto descriptors */ 151 crp = crypto_getreq(1); 152 if (crp == NULL) { 153 DPRINTF("no crypto descriptors\n"); 154 error = ENOBUFS; 155 goto error_m; 156 } 157 /* Get IPsec-specific opaque pointer */ 158 tc = pool_cache_get(ipcomp_tdb_crypto_pool_cache, PR_NOWAIT); 159 if (tc == NULL) { 160 DPRINTF("cannot allocate tdb_crypto\n"); 161 error = ENOBUFS; 162 goto error_crp; 163 } 164 165 error = m_makewritable(&m, 0, m->m_pkthdr.len, M_NOWAIT); 166 if (error) { 167 DPRINTF("m_makewritable failed\n"); 168 goto error_tc; 169 } 170 171 { 172 int s = pserialize_read_enter(); 173 174 /* 175 * Take another reference to the SA for opencrypto callback. 176 */ 177 if (__predict_false(sav->state == SADB_SASTATE_DEAD)) { 178 pserialize_read_exit(s); 179 stat = IPCOMP_STAT_NOTDB; 180 error = ENOENT; 181 goto error_tc; 182 } 183 KEY_SA_REF(sav); 184 pserialize_read_exit(s); 185 } 186 187 crdc = crp->crp_desc; 188 189 crdc->crd_skip = skip + hlen; 190 crdc->crd_len = m->m_pkthdr.len - (skip + hlen); 191 crdc->crd_inject = 0; /* unused */ 192 193 /* Decompression operation */ 194 crdc->crd_alg = sav->tdb_compalgxform->type; 195 196 /* Crypto operation descriptor */ 197 crp->crp_ilen = m->m_pkthdr.len - (skip + hlen); 198 crp->crp_olen = MCLBYTES; /* hint to decompression code */ 199 crp->crp_flags = CRYPTO_F_IMBUF; 200 crp->crp_buf = m; 201 crp->crp_callback = ipcomp_input_cb; 202 crp->crp_sid = sav->tdb_cryptoid; 203 crp->crp_opaque = tc; 204 205 /* These are passed as-is to the callback */ 206 tc->tc_spi = sav->spi; 207 tc->tc_dst = sav->sah->saidx.dst; 208 tc->tc_proto = sav->sah->saidx.proto; 209 tc->tc_protoff = protoff; 210 tc->tc_skip = skip; 211 tc->tc_sav = sav; 212 213 return crypto_dispatch(crp); 214 215 error_tc: 216 pool_cache_put(ipcomp_tdb_crypto_pool_cache, tc); 217 error_crp: 218 crypto_freereq(crp); 219 error_m: 220 m_freem(m); 221 IPCOMP_STATINC(stat); 222 return error; 223 } 224 225 #ifdef INET6 226 #define IPSEC_COMMON_INPUT_CB(m, sav, skip, protoff) do { \ 227 if (saidx->dst.sa.sa_family == AF_INET6) { \ 228 (void)ipsec6_common_input_cb(m, sav, skip, protoff); \ 229 } else { \ 230 (void)ipsec4_common_input_cb(m, sav, skip, protoff); \ 231 } \ 232 } while (0) 233 #else 234 #define IPSEC_COMMON_INPUT_CB(m, sav, skip, protoff) \ 235 ((void)ipsec4_common_input_cb(m, sav, skip, protoff)) 236 #endif 237 238 /* 239 * IPComp input callback from the crypto driver. 240 */ 241 static void 242 ipcomp_input_cb(struct cryptop *crp) 243 { 244 char buf[IPSEC_ADDRSTRLEN]; 245 struct tdb_crypto *tc; 246 int skip, protoff; 247 struct mbuf *m; 248 struct secasvar *sav; 249 struct secasindex *saidx __diagused; 250 int hlen = IPCOMP_HLENGTH, clen; 251 uint8_t nproto; 252 struct ipcomp *ipc; 253 IPSEC_DECLARE_LOCK_VARIABLE; 254 255 KASSERT(crp->crp_opaque != NULL); 256 tc = crp->crp_opaque; 257 skip = tc->tc_skip; 258 protoff = tc->tc_protoff; 259 m = crp->crp_buf; 260 261 IPSEC_ACQUIRE_GLOBAL_LOCKS(); 262 263 sav = tc->tc_sav; 264 saidx = &sav->sah->saidx; 265 KASSERTMSG(saidx->dst.sa.sa_family == AF_INET || 266 saidx->dst.sa.sa_family == AF_INET6, 267 "unexpected protocol family %u", saidx->dst.sa.sa_family); 268 269 /* Check for crypto errors */ 270 if (crp->crp_etype) { 271 /* Reset the session ID */ 272 if (sav->tdb_cryptoid != 0) 273 sav->tdb_cryptoid = crp->crp_sid; 274 275 if (crp->crp_etype == EAGAIN) { 276 KEY_SA_UNREF(&sav); 277 IPSEC_RELEASE_GLOBAL_LOCKS(); 278 (void)crypto_dispatch(crp); 279 return; 280 } 281 282 IPCOMP_STATINC(IPCOMP_STAT_NOXFORM); 283 DPRINTF("crypto error %d\n", crp->crp_etype); 284 goto bad; 285 } 286 287 IPCOMP_STATINC(IPCOMP_STAT_HIST + ipcomp_stats[sav->alg_comp]); 288 289 /* Update the counters */ 290 IPCOMP_STATADD(IPCOMP_STAT_IBYTES, m->m_pkthdr.len - skip - hlen); 291 292 /* Length of data after processing */ 293 clen = crp->crp_olen; 294 295 /* Release the crypto descriptors */ 296 pool_cache_put(ipcomp_tdb_crypto_pool_cache, tc); 297 tc = NULL; 298 crypto_freereq(crp); 299 crp = NULL; 300 301 /* In case it's not done already, adjust the size of the mbuf chain */ 302 m->m_pkthdr.len = clen + hlen + skip; 303 304 /* 305 * Get the next protocol field. 306 * 307 * XXX: Really, we should use m_copydata instead of m_pullup. 308 */ 309 if (m->m_len < skip + hlen && (m = m_pullup(m, skip + hlen)) == 0) { 310 IPCOMP_STATINC(IPCOMP_STAT_HDROPS); 311 DPRINTF("m_pullup failed\n"); 312 goto bad; 313 } 314 ipc = (struct ipcomp *)(mtod(m, uint8_t *) + skip); 315 nproto = ipc->comp_nxt; 316 317 switch (nproto) { 318 case IPPROTO_IPCOMP: 319 case IPPROTO_AH: 320 case IPPROTO_ESP: 321 IPCOMP_STATINC(IPCOMP_STAT_HDROPS); 322 DPRINTF("nested ipcomp, IPCA %s/%08lx\n", 323 ipsec_address(&sav->sah->saidx.dst, buf, sizeof(buf)), 324 (u_long) ntohl(sav->spi)); 325 goto bad; 326 default: 327 break; 328 } 329 330 /* Remove the IPCOMP header */ 331 if (m_striphdr(m, skip, hlen) != 0) { 332 IPCOMP_STATINC(IPCOMP_STAT_HDROPS); 333 DPRINTF("bad mbuf chain, IPCA %s/%08lx\n", 334 ipsec_address(&sav->sah->saidx.dst, buf, sizeof(buf)), 335 (u_long) ntohl(sav->spi)); 336 goto bad; 337 } 338 339 /* Restore the Next Protocol field */ 340 m_copyback(m, protoff, sizeof(nproto), &nproto); 341 342 IPSEC_COMMON_INPUT_CB(m, sav, skip, protoff); 343 344 KEY_SA_UNREF(&sav); 345 IPSEC_RELEASE_GLOBAL_LOCKS(); 346 return; 347 348 bad: 349 if (sav) 350 KEY_SA_UNREF(&sav); 351 IPSEC_RELEASE_GLOBAL_LOCKS(); 352 if (m) 353 m_freem(m); 354 if (tc != NULL) 355 pool_cache_put(ipcomp_tdb_crypto_pool_cache, tc); 356 if (crp) 357 crypto_freereq(crp); 358 } 359 360 /* 361 * IPComp output routine, called by ipsec[46]_process_packet() 362 */ 363 static int 364 ipcomp_output(struct mbuf *m, const struct ipsecrequest *isr, 365 struct secasvar *sav, int skip, int protoff, int flags) 366 { 367 char buf[IPSEC_ADDRSTRLEN]; 368 const struct comp_algo *ipcompx; 369 int error, ralen, hlen, maxpacketsize; 370 struct cryptodesc *crdc; 371 struct cryptop *crp; 372 struct tdb_crypto *tc; 373 374 KASSERT(sav != NULL); 375 KASSERT(sav->tdb_compalgxform != NULL); 376 ipcompx = sav->tdb_compalgxform; 377 378 /* Raw payload length before comp. */ 379 ralen = m->m_pkthdr.len - skip; 380 381 /* Don't process the packet if it is too short */ 382 if (ralen < ipcompx->minlen) { 383 IPCOMP_STATINC(IPCOMP_STAT_MINLEN); 384 return ipsec_process_done(m, isr, sav, 0); 385 } 386 387 hlen = IPCOMP_HLENGTH; 388 389 IPCOMP_STATINC(IPCOMP_STAT_OUTPUT); 390 391 /* Check for maximum packet size violations. */ 392 switch (sav->sah->saidx.dst.sa.sa_family) { 393 #ifdef INET 394 case AF_INET: 395 maxpacketsize = IP_MAXPACKET; 396 break; 397 #endif 398 #ifdef INET6 399 case AF_INET6: 400 maxpacketsize = IPV6_MAXPACKET; 401 break; 402 #endif 403 default: 404 IPCOMP_STATINC(IPCOMP_STAT_NOPF); 405 DPRINTF("unknown/unsupported protocol family %d" 406 ", IPCA %s/%08lx\n", 407 sav->sah->saidx.dst.sa.sa_family, 408 ipsec_address(&sav->sah->saidx.dst, buf, sizeof(buf)), 409 (u_long) ntohl(sav->spi)); 410 error = EPFNOSUPPORT; 411 goto bad; 412 } 413 if (skip + hlen + ralen > maxpacketsize) { 414 IPCOMP_STATINC(IPCOMP_STAT_TOOBIG); 415 DPRINTF("packet in IPCA %s/%08lx got too big " 416 "(len %u, max len %u)\n", 417 ipsec_address(&sav->sah->saidx.dst, buf, sizeof(buf)), 418 (u_long) ntohl(sav->spi), 419 skip + hlen + ralen, maxpacketsize); 420 error = EMSGSIZE; 421 goto bad; 422 } 423 424 /* Update the counters */ 425 IPCOMP_STATADD(IPCOMP_STAT_OBYTES, m->m_pkthdr.len - skip); 426 427 m = m_clone(m); 428 if (m == NULL) { 429 IPCOMP_STATINC(IPCOMP_STAT_HDROPS); 430 DPRINTF("cannot clone mbuf chain, IPCA %s/%08lx\n", 431 ipsec_address(&sav->sah->saidx.dst, buf, sizeof(buf)), 432 (u_long) ntohl(sav->spi)); 433 error = ENOBUFS; 434 goto bad; 435 } 436 437 /* Ok now, we can pass to the crypto processing */ 438 439 /* Get crypto descriptors */ 440 crp = crypto_getreq(1); 441 if (crp == NULL) { 442 IPCOMP_STATINC(IPCOMP_STAT_CRYPTO); 443 DPRINTF("failed to acquire crypto descriptor\n"); 444 error = ENOBUFS; 445 goto bad; 446 } 447 crdc = crp->crp_desc; 448 449 /* Compression descriptor */ 450 crdc->crd_skip = skip; 451 crdc->crd_len = m->m_pkthdr.len - skip; 452 crdc->crd_flags = CRD_F_COMP; 453 crdc->crd_inject = skip; 454 455 /* Compression operation */ 456 crdc->crd_alg = ipcompx->type; 457 458 /* IPsec-specific opaque crypto info */ 459 tc = pool_cache_get(ipcomp_tdb_crypto_pool_cache, PR_NOWAIT); 460 if (tc == NULL) { 461 IPCOMP_STATINC(IPCOMP_STAT_CRYPTO); 462 DPRINTF("failed to allocate tdb_crypto\n"); 463 crypto_freereq(crp); 464 error = ENOBUFS; 465 goto bad; 466 } 467 468 { 469 int s = pserialize_read_enter(); 470 471 /* 472 * Take another reference to the SP and the SA for opencrypto callback. 473 */ 474 if (__predict_false(isr->sp->state == IPSEC_SPSTATE_DEAD || 475 sav->state == SADB_SASTATE_DEAD)) { 476 pserialize_read_exit(s); 477 pool_cache_put(ipcomp_tdb_crypto_pool_cache, tc); 478 crypto_freereq(crp); 479 IPCOMP_STATINC(IPCOMP_STAT_NOTDB); 480 error = ENOENT; 481 goto bad; 482 } 483 KEY_SP_REF(isr->sp); 484 KEY_SA_REF(sav); 485 pserialize_read_exit(s); 486 } 487 488 tc->tc_isr = isr; 489 tc->tc_spi = sav->spi; 490 tc->tc_dst = sav->sah->saidx.dst; 491 tc->tc_proto = sav->sah->saidx.proto; 492 tc->tc_skip = skip; 493 tc->tc_protoff = protoff; 494 tc->tc_flags = flags; 495 tc->tc_sav = sav; 496 497 /* Crypto operation descriptor */ 498 crp->crp_ilen = m->m_pkthdr.len; /* Total input length */ 499 crp->crp_flags = CRYPTO_F_IMBUF; 500 crp->crp_buf = m; 501 crp->crp_callback = ipcomp_output_cb; 502 crp->crp_opaque = tc; 503 crp->crp_sid = sav->tdb_cryptoid; 504 505 return crypto_dispatch(crp); 506 507 bad: 508 if (m) 509 m_freem(m); 510 return error; 511 } 512 513 /* 514 * IPComp output callback from the crypto driver. 515 */ 516 static void 517 ipcomp_output_cb(struct cryptop *crp) 518 { 519 char buf[IPSEC_ADDRSTRLEN]; 520 struct tdb_crypto *tc; 521 const struct ipsecrequest *isr; 522 struct secasvar *sav; 523 struct mbuf *m, *mo; 524 int skip, rlen, roff, flags; 525 uint8_t prot; 526 uint16_t cpi; 527 struct ipcomp * ipcomp; 528 IPSEC_DECLARE_LOCK_VARIABLE; 529 530 KASSERT(crp->crp_opaque != NULL); 531 tc = crp->crp_opaque; 532 m = crp->crp_buf; 533 skip = tc->tc_skip; 534 rlen = crp->crp_ilen - skip; 535 536 IPSEC_ACQUIRE_GLOBAL_LOCKS(); 537 538 isr = tc->tc_isr; 539 sav = tc->tc_sav; 540 541 /* Check for crypto errors */ 542 if (crp->crp_etype) { 543 /* Reset session ID */ 544 if (sav->tdb_cryptoid != 0) 545 sav->tdb_cryptoid = crp->crp_sid; 546 547 if (crp->crp_etype == EAGAIN) { 548 IPSEC_RELEASE_GLOBAL_LOCKS(); 549 (void)crypto_dispatch(crp); 550 return; 551 } 552 IPCOMP_STATINC(IPCOMP_STAT_NOXFORM); 553 DPRINTF("crypto error %d\n", crp->crp_etype); 554 goto bad; 555 } 556 557 IPCOMP_STATINC(IPCOMP_STAT_HIST + ipcomp_stats[sav->alg_comp]); 558 559 if (rlen > crp->crp_olen) { 560 /* Inject IPCOMP header */ 561 mo = m_makespace(m, skip, IPCOMP_HLENGTH, &roff); 562 if (mo == NULL) { 563 IPCOMP_STATINC(IPCOMP_STAT_WRAP); 564 DPRINTF("failed to inject IPCOMP header for " 565 "IPCA %s/%08lx\n", 566 ipsec_address(&sav->sah->saidx.dst, buf, 567 sizeof(buf)), (u_long) ntohl(sav->spi)); 568 goto bad; 569 } 570 ipcomp = (struct ipcomp *)(mtod(mo, char *) + roff); 571 572 /* Initialize the IPCOMP header */ 573 /* XXX alignment always correct? */ 574 switch (sav->sah->saidx.dst.sa.sa_family) { 575 #ifdef INET 576 case AF_INET: 577 ipcomp->comp_nxt = mtod(m, struct ip *)->ip_p; 578 break; 579 #endif 580 #ifdef INET6 581 case AF_INET6: 582 ipcomp->comp_nxt = mtod(m, struct ip6_hdr *)->ip6_nxt; 583 break; 584 #endif 585 } 586 ipcomp->comp_flags = 0; 587 588 if ((sav->flags & SADB_X_EXT_RAWCPI) == 0) 589 cpi = sav->alg_enc; 590 else 591 cpi = ntohl(sav->spi) & 0xffff; 592 ipcomp->comp_cpi = htons(cpi); 593 594 /* Fix Next Protocol in IPv4/IPv6 header */ 595 prot = IPPROTO_IPCOMP; 596 m_copyback(m, tc->tc_protoff, sizeof(prot), &prot); 597 598 /* Adjust the length in the IP header */ 599 switch (sav->sah->saidx.dst.sa.sa_family) { 600 #ifdef INET 601 case AF_INET: 602 mtod(m, struct ip *)->ip_len = htons(m->m_pkthdr.len); 603 break; 604 #endif 605 #ifdef INET6 606 case AF_INET6: 607 mtod(m, struct ip6_hdr *)->ip6_plen = 608 htons(m->m_pkthdr.len - sizeof(struct ip6_hdr)); 609 break; 610 #endif 611 default: 612 IPCOMP_STATINC(IPCOMP_STAT_NOPF); 613 DPRINTF("unknown/unsupported protocol " 614 "family %d, IPCA %s/%08lx\n", 615 sav->sah->saidx.dst.sa.sa_family, 616 ipsec_address(&sav->sah->saidx.dst, buf, 617 sizeof(buf)), (u_long) ntohl(sav->spi)); 618 goto bad; 619 } 620 } else { 621 /* compression was useless, we have lost time */ 622 IPCOMP_STATINC(IPCOMP_STAT_USELESS); 623 DPRINTF("compression was useless: initial size was %d " 624 "and compressed size is %d\n", rlen, crp->crp_olen); 625 } 626 627 flags = tc->tc_flags; 628 /* Release the crypto descriptor */ 629 pool_cache_put(ipcomp_tdb_crypto_pool_cache, tc); 630 crypto_freereq(crp); 631 632 /* NB: m is reclaimed by ipsec_process_done. */ 633 (void)ipsec_process_done(m, isr, sav, flags); 634 KEY_SA_UNREF(&sav); 635 KEY_SP_UNREF(&isr->sp); 636 IPSEC_RELEASE_GLOBAL_LOCKS(); 637 return; 638 639 bad: 640 if (sav) 641 KEY_SA_UNREF(&sav); 642 KEY_SP_UNREF(&isr->sp); 643 IPSEC_RELEASE_GLOBAL_LOCKS(); 644 if (m) 645 m_freem(m); 646 pool_cache_put(ipcomp_tdb_crypto_pool_cache, tc); 647 crypto_freereq(crp); 648 } 649 650 static struct xformsw ipcomp_xformsw = { 651 .xf_type = XF_IPCOMP, 652 .xf_flags = XFT_COMP, 653 .xf_name = "IPcomp", 654 .xf_init = ipcomp_init, 655 .xf_zeroize = ipcomp_zeroize, 656 .xf_input = ipcomp_input, 657 .xf_output = ipcomp_output, 658 .xf_next = NULL, 659 }; 660 661 void 662 ipcomp_attach(void) 663 { 664 ipcompstat_percpu = percpu_alloc(sizeof(uint64_t) * IPCOMP_NSTATS); 665 ipcomp_tdb_crypto_pool_cache = pool_cache_init(sizeof(struct tdb_crypto), 666 coherency_unit, 0, 0, "ipcomp_tdb_crypto", NULL, IPL_SOFTNET, 667 NULL, NULL, NULL); 668 xform_register(&ipcomp_xformsw); 669 } 670
Indexes created Wed Sep 24 05:09:52 GMT 2025