1 /* $NetBSD: xform_ipcomp.c,v 1.76 2024/07/05 04:31:54 rin 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 1.76 2024/07/05 04:31:54 rin 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 void 128 ipcomp_zeroize(struct secasvar *sav) 129 { 130 131 crypto_freesession(sav->tdb_cryptoid); 132 sav->tdb_cryptoid = 0; 133 } 134 135 /* 136 * ipcomp_input() gets called to uncompress an input packet 137 */ 138 static int 139 ipcomp_input(struct mbuf *m, struct secasvar *sav, int skip, int protoff) 140 { 141 struct tdb_crypto *tc; 142 struct cryptodesc *crdc; 143 struct cryptop *crp; 144 int error, hlen = IPCOMP_HLENGTH, stat = IPCOMP_STAT_CRYPTO; 145 146 KASSERT(skip + hlen <= m->m_pkthdr.len); 147 148 /* Get crypto descriptors */ 149 crp = crypto_getreq(1); 150 if (crp == NULL) { 151 DPRINTF("no crypto descriptors\n"); 152 error = ENOBUFS; 153 goto error_m; 154 } 155 /* Get IPsec-specific opaque pointer */ 156 tc = pool_cache_get(ipcomp_tdb_crypto_pool_cache, PR_NOWAIT); 157 if (tc == NULL) { 158 DPRINTF("cannot allocate tdb_crypto\n"); 159 error = ENOBUFS; 160 goto error_crp; 161 } 162 163 error = m_makewritable(&m, 0, m->m_pkthdr.len, M_NOWAIT); 164 if (error) { 165 DPRINTF("m_makewritable failed\n"); 166 goto error_tc; 167 } 168 169 { 170 int s = pserialize_read_enter(); 171 172 /* 173 * Take another reference to the SA for opencrypto callback. 174 */ 175 if (__predict_false(sav->state == SADB_SASTATE_DEAD)) { 176 pserialize_read_exit(s); 177 stat = IPCOMP_STAT_NOTDB; 178 error = ENOENT; 179 goto error_tc; 180 } 181 KEY_SA_REF(sav); 182 pserialize_read_exit(s); 183 } 184 185 crdc = crp->crp_desc; 186 187 crdc->crd_skip = skip + hlen; 188 crdc->crd_len = m->m_pkthdr.len - (skip + hlen); 189 crdc->crd_inject = 0; /* unused */ 190 191 /* Decompression operation */ 192 crdc->crd_alg = sav->tdb_compalgxform->type; 193 194 /* Crypto operation descriptor */ 195 crp->crp_ilen = m->m_pkthdr.len - (skip + hlen); 196 crp->crp_olen = MCLBYTES; /* hint to decompression code */ 197 crp->crp_flags = CRYPTO_F_IMBUF; 198 crp->crp_buf = m; 199 crp->crp_callback = ipcomp_input_cb; 200 crp->crp_sid = sav->tdb_cryptoid; 201 crp->crp_opaque = tc; 202 203 /* These are passed as-is to the callback */ 204 tc->tc_spi = sav->spi; 205 tc->tc_dst = sav->sah->saidx.dst; 206 tc->tc_proto = sav->sah->saidx.proto; 207 tc->tc_protoff = protoff; 208 tc->tc_skip = skip; 209 tc->tc_sav = sav; 210 211 crypto_dispatch(crp); 212 return 0; 213 214 error_tc: 215 pool_cache_put(ipcomp_tdb_crypto_pool_cache, tc); 216 error_crp: 217 crypto_freereq(crp); 218 error_m: 219 m_freem(m); 220 IPCOMP_STATINC(stat); 221 return error; 222 } 223 224 #ifdef INET6 225 #define IPSEC_COMMON_INPUT_CB(m, sav, skip, protoff) do { \ 226 if (saidx->dst.sa.sa_family == AF_INET6) { \ 227 (void)ipsec6_common_input_cb(m, sav, skip, protoff); \ 228 } else { \ 229 (void)ipsec4_common_input_cb(m, sav, skip, protoff); \ 230 } \ 231 } while (0) 232 #else 233 #define IPSEC_COMMON_INPUT_CB(m, sav, skip, protoff) \ 234 ((void)ipsec4_common_input_cb(m, sav, skip, protoff)) 235 #endif 236 237 /* 238 * IPComp input callback from the crypto driver. 239 */ 240 static void 241 ipcomp_input_cb(struct cryptop *crp) 242 { 243 char buf[IPSEC_ADDRSTRLEN]; 244 struct tdb_crypto *tc; 245 int skip, protoff; 246 struct mbuf *m; 247 struct secasvar *sav; 248 struct secasindex *saidx __diagused; 249 int hlen = IPCOMP_HLENGTH, clen; 250 uint8_t nproto; 251 struct ipcomp *ipc; 252 IPSEC_DECLARE_LOCK_VARIABLE; 253 254 KASSERT(crp->crp_opaque != NULL); 255 tc = crp->crp_opaque; 256 skip = tc->tc_skip; 257 protoff = tc->tc_protoff; 258 m = crp->crp_buf; 259 260 IPSEC_ACQUIRE_GLOBAL_LOCKS(); 261 262 sav = tc->tc_sav; 263 saidx = &sav->sah->saidx; 264 KASSERTMSG(saidx->dst.sa.sa_family == AF_INET || 265 saidx->dst.sa.sa_family == AF_INET6, 266 "unexpected protocol family %u", saidx->dst.sa.sa_family); 267 268 /* Check for crypto errors */ 269 if (crp->crp_etype) { 270 /* Reset the session ID */ 271 if (sav->tdb_cryptoid != 0) 272 sav->tdb_cryptoid = crp->crp_sid; 273 274 IPCOMP_STATINC(IPCOMP_STAT_NOXFORM); 275 DPRINTF("crypto error %d\n", crp->crp_etype); 276 goto bad; 277 } 278 279 IPCOMP_STATINC(IPCOMP_STAT_HIST + ipcomp_stats[sav->alg_comp]); 280 281 /* Update the counters */ 282 IPCOMP_STATADD(IPCOMP_STAT_IBYTES, m->m_pkthdr.len - skip - hlen); 283 284 /* Length of data after processing */ 285 clen = crp->crp_olen; 286 287 /* Release the crypto descriptors */ 288 pool_cache_put(ipcomp_tdb_crypto_pool_cache, tc); 289 tc = NULL; 290 crypto_freereq(crp); 291 crp = NULL; 292 293 /* In case it's not done already, adjust the size of the mbuf chain */ 294 m->m_pkthdr.len = clen + hlen + skip; 295 296 /* 297 * Get the next protocol field. 298 * 299 * XXX: Really, we should use m_copydata instead of m_pullup. 300 */ 301 if (m->m_len < skip + hlen && (m = m_pullup(m, skip + hlen)) == 0) { 302 IPCOMP_STATINC(IPCOMP_STAT_HDROPS); 303 DPRINTF("m_pullup failed\n"); 304 goto bad; 305 } 306 ipc = (struct ipcomp *)(mtod(m, uint8_t *) + skip); 307 nproto = ipc->comp_nxt; 308 309 switch (nproto) { 310 case IPPROTO_IPCOMP: 311 case IPPROTO_AH: 312 case IPPROTO_ESP: 313 IPCOMP_STATINC(IPCOMP_STAT_HDROPS); 314 DPRINTF("nested ipcomp, IPCA %s/%08lx\n", 315 ipsec_address(&sav->sah->saidx.dst, buf, sizeof(buf)), 316 (u_long) ntohl(sav->spi)); 317 goto bad; 318 default: 319 break; 320 } 321 322 /* Remove the IPCOMP header */ 323 if (m_striphdr(m, skip, hlen) != 0) { 324 IPCOMP_STATINC(IPCOMP_STAT_HDROPS); 325 DPRINTF("bad mbuf chain, IPCA %s/%08lx\n", 326 ipsec_address(&sav->sah->saidx.dst, buf, sizeof(buf)), 327 (u_long) ntohl(sav->spi)); 328 goto bad; 329 } 330 331 /* Restore the Next Protocol field */ 332 m_copyback(m, protoff, sizeof(nproto), &nproto); 333 334 IPSEC_COMMON_INPUT_CB(m, sav, skip, protoff); 335 336 KEY_SA_UNREF(&sav); 337 IPSEC_RELEASE_GLOBAL_LOCKS(); 338 return; 339 340 bad: 341 if (sav) 342 KEY_SA_UNREF(&sav); 343 IPSEC_RELEASE_GLOBAL_LOCKS(); 344 m_freem(m); 345 if (tc != NULL) 346 pool_cache_put(ipcomp_tdb_crypto_pool_cache, tc); 347 if (crp) 348 crypto_freereq(crp); 349 } 350 351 /* 352 * IPComp output routine, called by ipsec[46]_process_packet() 353 */ 354 static int 355 ipcomp_output(struct mbuf *m, const struct ipsecrequest *isr, 356 struct secasvar *sav, int skip, int protoff, int flags) 357 { 358 char buf[IPSEC_ADDRSTRLEN]; 359 const struct comp_algo *ipcompx; 360 int error, ralen, hlen, maxpacketsize; 361 struct cryptodesc *crdc; 362 struct cryptop *crp; 363 struct tdb_crypto *tc; 364 365 KASSERT(sav != NULL); 366 KASSERT(sav->tdb_compalgxform != NULL); 367 ipcompx = sav->tdb_compalgxform; 368 369 /* Raw payload length before comp. */ 370 ralen = m->m_pkthdr.len - skip; 371 372 /* Don't process the packet if it is too short */ 373 if (ralen < ipcompx->minlen) { 374 IPCOMP_STATINC(IPCOMP_STAT_MINLEN); 375 return ipsec_process_done(m, isr, sav, 0); 376 } 377 378 hlen = IPCOMP_HLENGTH; 379 380 IPCOMP_STATINC(IPCOMP_STAT_OUTPUT); 381 382 /* Check for maximum packet size violations. */ 383 switch (sav->sah->saidx.dst.sa.sa_family) { 384 #ifdef INET 385 case AF_INET: 386 maxpacketsize = IP_MAXPACKET; 387 break; 388 #endif 389 #ifdef INET6 390 case AF_INET6: 391 maxpacketsize = IPV6_MAXPACKET; 392 break; 393 #endif 394 default: 395 IPCOMP_STATINC(IPCOMP_STAT_NOPF); 396 DPRINTF("unknown/unsupported protocol family %d" 397 ", IPCA %s/%08lx\n", 398 sav->sah->saidx.dst.sa.sa_family, 399 ipsec_address(&sav->sah->saidx.dst, buf, sizeof(buf)), 400 (u_long) ntohl(sav->spi)); 401 error = EPFNOSUPPORT; 402 goto bad; 403 } 404 if (skip + hlen + ralen > maxpacketsize) { 405 IPCOMP_STATINC(IPCOMP_STAT_TOOBIG); 406 DPRINTF("packet in IPCA %s/%08lx got too big " 407 "(len %u, max len %u)\n", 408 ipsec_address(&sav->sah->saidx.dst, buf, sizeof(buf)), 409 (u_long) ntohl(sav->spi), 410 skip + hlen + ralen, maxpacketsize); 411 error = EMSGSIZE; 412 goto bad; 413 } 414 415 /* Update the counters */ 416 IPCOMP_STATADD(IPCOMP_STAT_OBYTES, m->m_pkthdr.len - skip); 417 418 m = m_clone(m); 419 if (m == NULL) { 420 IPCOMP_STATINC(IPCOMP_STAT_HDROPS); 421 DPRINTF("cannot clone mbuf chain, IPCA %s/%08lx\n", 422 ipsec_address(&sav->sah->saidx.dst, buf, sizeof(buf)), 423 (u_long) ntohl(sav->spi)); 424 error = ENOBUFS; 425 goto bad; 426 } 427 428 /* Ok now, we can pass to the crypto processing */ 429 430 /* Get crypto descriptors */ 431 crp = crypto_getreq(1); 432 if (crp == NULL) { 433 IPCOMP_STATINC(IPCOMP_STAT_CRYPTO); 434 DPRINTF("failed to acquire crypto descriptor\n"); 435 error = ENOBUFS; 436 goto bad; 437 } 438 crdc = crp->crp_desc; 439 440 /* Compression descriptor */ 441 crdc->crd_skip = skip; 442 crdc->crd_len = m->m_pkthdr.len - skip; 443 crdc->crd_flags = CRD_F_COMP; 444 crdc->crd_inject = skip; 445 446 /* Compression operation */ 447 crdc->crd_alg = ipcompx->type; 448 449 /* IPsec-specific opaque crypto info */ 450 tc = pool_cache_get(ipcomp_tdb_crypto_pool_cache, PR_NOWAIT); 451 if (tc == NULL) { 452 IPCOMP_STATINC(IPCOMP_STAT_CRYPTO); 453 DPRINTF("failed to allocate tdb_crypto\n"); 454 crypto_freereq(crp); 455 error = ENOBUFS; 456 goto bad; 457 } 458 459 { 460 int s = pserialize_read_enter(); 461 462 /* 463 * Take another reference to the SP and the SA for opencrypto callback. 464 */ 465 if (__predict_false(isr->sp->state == IPSEC_SPSTATE_DEAD || 466 sav->state == SADB_SASTATE_DEAD)) { 467 pserialize_read_exit(s); 468 pool_cache_put(ipcomp_tdb_crypto_pool_cache, tc); 469 crypto_freereq(crp); 470 IPCOMP_STATINC(IPCOMP_STAT_NOTDB); 471 error = ENOENT; 472 goto bad; 473 } 474 KEY_SP_REF(isr->sp); 475 KEY_SA_REF(sav); 476 pserialize_read_exit(s); 477 } 478 479 tc->tc_isr = isr; 480 tc->tc_spi = sav->spi; 481 tc->tc_dst = sav->sah->saidx.dst; 482 tc->tc_proto = sav->sah->saidx.proto; 483 tc->tc_skip = skip; 484 tc->tc_protoff = protoff; 485 tc->tc_flags = flags; 486 tc->tc_sav = sav; 487 488 /* Crypto operation descriptor */ 489 crp->crp_ilen = m->m_pkthdr.len; /* Total input length */ 490 crp->crp_flags = CRYPTO_F_IMBUF; 491 crp->crp_buf = m; 492 crp->crp_callback = ipcomp_output_cb; 493 crp->crp_opaque = tc; 494 crp->crp_sid = sav->tdb_cryptoid; 495 496 crypto_dispatch(crp); 497 return 0; 498 499 bad: 500 m_freem(m); 501 return error; 502 } 503 504 /* 505 * IPComp output callback from the crypto driver. 506 */ 507 static void 508 ipcomp_output_cb(struct cryptop *crp) 509 { 510 char buf[IPSEC_ADDRSTRLEN]; 511 struct tdb_crypto *tc; 512 const struct ipsecrequest *isr; 513 struct secasvar *sav; 514 struct mbuf *m, *mo; 515 int skip, rlen, roff, flags; 516 uint8_t prot; 517 uint16_t cpi; 518 struct ipcomp * ipcomp; 519 IPSEC_DECLARE_LOCK_VARIABLE; 520 521 KASSERT(crp->crp_opaque != NULL); 522 tc = crp->crp_opaque; 523 m = crp->crp_buf; 524 skip = tc->tc_skip; 525 rlen = crp->crp_ilen - skip; 526 527 IPSEC_ACQUIRE_GLOBAL_LOCKS(); 528 529 isr = tc->tc_isr; 530 sav = tc->tc_sav; 531 532 /* Check for crypto errors */ 533 if (crp->crp_etype) { 534 /* Reset session ID */ 535 if (sav->tdb_cryptoid != 0) 536 sav->tdb_cryptoid = crp->crp_sid; 537 538 IPCOMP_STATINC(IPCOMP_STAT_NOXFORM); 539 DPRINTF("crypto error %d\n", crp->crp_etype); 540 goto bad; 541 } 542 543 IPCOMP_STATINC(IPCOMP_STAT_HIST + ipcomp_stats[sav->alg_comp]); 544 545 if (rlen > crp->crp_olen) { 546 /* Inject IPCOMP header */ 547 mo = m_makespace(m, skip, IPCOMP_HLENGTH, &roff); 548 if (mo == NULL) { 549 IPCOMP_STATINC(IPCOMP_STAT_WRAP); 550 DPRINTF("failed to inject IPCOMP header for " 551 "IPCA %s/%08lx\n", 552 ipsec_address(&sav->sah->saidx.dst, buf, 553 sizeof(buf)), (u_long) ntohl(sav->spi)); 554 goto bad; 555 } 556 ipcomp = (struct ipcomp *)(mtod(mo, char *) + roff); 557 558 /* Initialize the IPCOMP header */ 559 /* XXX alignment always correct? */ 560 switch (sav->sah->saidx.dst.sa.sa_family) { 561 #ifdef INET 562 case AF_INET: 563 ipcomp->comp_nxt = mtod(m, struct ip *)->ip_p; 564 break; 565 #endif 566 #ifdef INET6 567 case AF_INET6: 568 ipcomp->comp_nxt = mtod(m, struct ip6_hdr *)->ip6_nxt; 569 break; 570 #endif 571 } 572 ipcomp->comp_flags = 0; 573 574 cpi = ntohl(sav->spi) & 0xffff; 575 ipcomp->comp_cpi = htons(cpi); 576 577 /* Fix Next Protocol in IPv4/IPv6 header */ 578 prot = IPPROTO_IPCOMP; 579 m_copyback(m, tc->tc_protoff, sizeof(prot), &prot); 580 581 /* Adjust the length in the IP header */ 582 switch (sav->sah->saidx.dst.sa.sa_family) { 583 #ifdef INET 584 case AF_INET: 585 mtod(m, struct ip *)->ip_len = htons(m->m_pkthdr.len); 586 break; 587 #endif 588 #ifdef INET6 589 case AF_INET6: 590 mtod(m, struct ip6_hdr *)->ip6_plen = 591 htons(m->m_pkthdr.len - sizeof(struct ip6_hdr)); 592 break; 593 #endif 594 default: 595 IPCOMP_STATINC(IPCOMP_STAT_NOPF); 596 DPRINTF("unknown/unsupported protocol " 597 "family %d, IPCA %s/%08lx\n", 598 sav->sah->saidx.dst.sa.sa_family, 599 ipsec_address(&sav->sah->saidx.dst, buf, 600 sizeof(buf)), (u_long) ntohl(sav->spi)); 601 goto bad; 602 } 603 } else { 604 /* compression was useless, we have lost time */ 605 IPCOMP_STATINC(IPCOMP_STAT_USELESS); 606 DPRINTF("compression was useless: initial size was %d " 607 "and compressed size is %d\n", rlen, crp->crp_olen); 608 } 609 610 flags = tc->tc_flags; 611 /* Release the crypto descriptor */ 612 pool_cache_put(ipcomp_tdb_crypto_pool_cache, tc); 613 crypto_freereq(crp); 614 615 /* NB: m is reclaimed by ipsec_process_done. */ 616 (void)ipsec_process_done(m, isr, sav, flags); 617 KEY_SA_UNREF(&sav); 618 KEY_SP_UNREF(&isr->sp); 619 IPSEC_RELEASE_GLOBAL_LOCKS(); 620 return; 621 622 bad: 623 if (sav) 624 KEY_SA_UNREF(&sav); 625 KEY_SP_UNREF(&isr->sp); 626 IPSEC_RELEASE_GLOBAL_LOCKS(); 627 m_freem(m); 628 pool_cache_put(ipcomp_tdb_crypto_pool_cache, tc); 629 crypto_freereq(crp); 630 } 631 632 static struct xformsw ipcomp_xformsw = { 633 .xf_type = XF_IPCOMP, 634 .xf_flags = XFT_COMP, 635 .xf_name = "IPcomp", 636 .xf_init = ipcomp_init, 637 .xf_zeroize = ipcomp_zeroize, 638 .xf_input = ipcomp_input, 639 .xf_output = ipcomp_output, 640 .xf_next = NULL, 641 }; 642 643 void 644 ipcomp_attach(void) 645 { 646 ipcompstat_percpu = percpu_alloc(sizeof(uint64_t) * IPCOMP_NSTATS); 647 ipcomp_tdb_crypto_pool_cache = pool_cache_init(sizeof(struct tdb_crypto), 648 coherency_unit, 0, 0, "ipcomp_tdb_crypto", NULL, IPL_SOFTNET, 649 NULL, NULL, NULL); 650 xform_register(&ipcomp_xformsw); 651 } 652
Indexes created Sun Sep 21 14:09:52 GMT 2025