1/* $NetBSD: xform_ipcomp.c,v 1.75 2022/10/19 21:28:02 christos 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@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 1.75 2022/10/19 21:28:02 christos 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 74percpu_t *ipcompstat_percpu; 75 76int ipcomp_enable = 1; 77 78static void ipcomp_input_cb(struct cryptop *crp); 79static void ipcomp_output_cb(struct cryptop *crp); 80 81const uint8_t ipcomp_stats[256] = { SADB_CALG_STATS_INIT }; 82 83static pool_cache_t ipcomp_tdb_crypto_pool_cache; 84 85const struct comp_algo * 86ipcomp_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 */ 98static int 99ipcomp_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 */ 127static void 128ipcomp_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 */ 138static int 139ipcomp_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 214error_tc: 215 pool_cache_put(ipcomp_tdb_crypto_pool_cache, tc); 216error_crp: 217 crypto_freereq(crp); 218error_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 */ 240static void 241ipcomp_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 340bad: 341 if (sav) 342 KEY_SA_UNREF(&sav); 343 IPSEC_RELEASE_GLOBAL_LOCKS(); 344 if (m) 345 m_freem(m); 346 if (tc != NULL) 347 pool_cache_put(ipcomp_tdb_crypto_pool_cache, tc); 348 if (crp) 349 crypto_freereq(crp); 350} 351 352/* 353 * IPComp output routine, called by ipsec[46]_process_packet() 354 */ 355static int 356ipcomp_output(struct mbuf *m, const struct ipsecrequest *isr, 357 struct secasvar *sav, int skip, int protoff, int flags) 358{ 359 char buf[IPSEC_ADDRSTRLEN]; 360 const struct comp_algo *ipcompx; 361 int error, ralen, hlen, maxpacketsize; 362 struct cryptodesc *crdc; 363 struct cryptop *crp; 364 struct tdb_crypto *tc; 365 366 KASSERT(sav != NULL); 367 KASSERT(sav->tdb_compalgxform != NULL); 368 ipcompx = sav->tdb_compalgxform; 369 370 /* Raw payload length before comp. */ 371 ralen = m->m_pkthdr.len - skip; 372 373 /* Don't process the packet if it is too short */ 374 if (ralen < ipcompx->minlen) { 375 IPCOMP_STATINC(IPCOMP_STAT_MINLEN); 376 return ipsec_process_done(m, isr, sav, 0); 377 } 378 379 hlen = IPCOMP_HLENGTH; 380 381 IPCOMP_STATINC(IPCOMP_STAT_OUTPUT); 382 383 /* Check for maximum packet size violations. */ 384 switch (sav->sah->saidx.dst.sa.sa_family) { 385#ifdef INET 386 case AF_INET: 387 maxpacketsize = IP_MAXPACKET; 388 break; 389#endif 390#ifdef INET6 391 case AF_INET6: 392 maxpacketsize = IPV6_MAXPACKET; 393 break; 394#endif 395 default: 396 IPCOMP_STATINC(IPCOMP_STAT_NOPF); 397 DPRINTF("unknown/unsupported protocol family %d" 398 ", IPCA %s/%08lx\n", 399 sav->sah->saidx.dst.sa.sa_family, 400 ipsec_address(&sav->sah->saidx.dst, buf, sizeof(buf)), 401 (u_long) ntohl(sav->spi)); 402 error = EPFNOSUPPORT; 403 goto bad; 404 } 405 if (skip + hlen + ralen > maxpacketsize) { 406 IPCOMP_STATINC(IPCOMP_STAT_TOOBIG); 407 DPRINTF("packet in IPCA %s/%08lx got too big " 408 "(len %u, max len %u)\n", 409 ipsec_address(&sav->sah->saidx.dst, buf, sizeof(buf)), 410 (u_long) ntohl(sav->spi), 411 skip + hlen + ralen, maxpacketsize); 412 error = EMSGSIZE; 413 goto bad; 414 } 415 416 /* Update the counters */ 417 IPCOMP_STATADD(IPCOMP_STAT_OBYTES, m->m_pkthdr.len - skip); 418 419 m = m_clone(m); 420 if (m == NULL) { 421 IPCOMP_STATINC(IPCOMP_STAT_HDROPS); 422 DPRINTF("cannot clone mbuf chain, IPCA %s/%08lx\n", 423 ipsec_address(&sav->sah->saidx.dst, buf, sizeof(buf)), 424 (u_long) ntohl(sav->spi)); 425 error = ENOBUFS; 426 goto bad; 427 } 428 429 /* Ok now, we can pass to the crypto processing */ 430 431 /* Get crypto descriptors */ 432 crp = crypto_getreq(1); 433 if (crp == NULL) { 434 IPCOMP_STATINC(IPCOMP_STAT_CRYPTO); 435 DPRINTF("failed to acquire crypto descriptor\n"); 436 error = ENOBUFS; 437 goto bad; 438 } 439 crdc = crp->crp_desc; 440 441 /* Compression descriptor */ 442 crdc->crd_skip = skip; 443 crdc->crd_len = m->m_pkthdr.len - skip; 444 crdc->crd_flags = CRD_F_COMP; 445 crdc->crd_inject = skip; 446 447 /* Compression operation */ 448 crdc->crd_alg = ipcompx->type; 449 450 /* IPsec-specific opaque crypto info */ 451 tc = pool_cache_get(ipcomp_tdb_crypto_pool_cache, PR_NOWAIT); 452 if (tc == NULL) { 453 IPCOMP_STATINC(IPCOMP_STAT_CRYPTO); 454 DPRINTF("failed to allocate tdb_crypto\n"); 455 crypto_freereq(crp); 456 error = ENOBUFS; 457 goto bad; 458 } 459 460 { 461 int s = pserialize_read_enter(); 462 463 /* 464 * Take another reference to the SP and the SA for opencrypto callback. 465 */ 466 if (__predict_false(isr->sp->state == IPSEC_SPSTATE_DEAD || 467 sav->state == SADB_SASTATE_DEAD)) { 468 pserialize_read_exit(s); 469 pool_cache_put(ipcomp_tdb_crypto_pool_cache, tc); 470 crypto_freereq(crp); 471 IPCOMP_STATINC(IPCOMP_STAT_NOTDB); 472 error = ENOENT; 473 goto bad; 474 } 475 KEY_SP_REF(isr->sp); 476 KEY_SA_REF(sav); 477 pserialize_read_exit(s); 478 } 479 480 tc->tc_isr = isr; 481 tc->tc_spi = sav->spi; 482 tc->tc_dst = sav->sah->saidx.dst; 483 tc->tc_proto = sav->sah->saidx.proto; 484 tc->tc_skip = skip; 485 tc->tc_protoff = protoff; 486 tc->tc_flags = flags; 487 tc->tc_sav = sav; 488 489 /* Crypto operation descriptor */ 490 crp->crp_ilen = m->m_pkthdr.len; /* Total input length */ 491 crp->crp_flags = CRYPTO_F_IMBUF; 492 crp->crp_buf = m; 493 crp->crp_callback = ipcomp_output_cb; 494 crp->crp_opaque = tc; 495 crp->crp_sid = sav->tdb_cryptoid; 496 497 crypto_dispatch(crp); 498 return 0; 499 500bad: 501 if (m) 502 m_freem(m); 503 return error; 504} 505 506/* 507 * IPComp output callback from the crypto driver. 508 */ 509static void 510ipcomp_output_cb(struct cryptop *crp) 511{ 512 char buf[IPSEC_ADDRSTRLEN]; 513 struct tdb_crypto *tc; 514 const struct ipsecrequest *isr; 515 struct secasvar *sav; 516 struct mbuf *m, *mo; 517 int skip, rlen, roff, flags; 518 uint8_t prot; 519 uint16_t cpi; 520 struct ipcomp * ipcomp; 521 IPSEC_DECLARE_LOCK_VARIABLE; 522 523 KASSERT(crp->crp_opaque != NULL); 524 tc = crp->crp_opaque; 525 m = crp->crp_buf; 526 skip = tc->tc_skip; 527 rlen = crp->crp_ilen - skip; 528 529 IPSEC_ACQUIRE_GLOBAL_LOCKS(); 530 531 isr = tc->tc_isr; 532 sav = tc->tc_sav; 533 534 /* Check for crypto errors */ 535 if (crp->crp_etype) { 536 /* Reset session ID */ 537 if (sav->tdb_cryptoid != 0) 538 sav->tdb_cryptoid = crp->crp_sid; 539 540 IPCOMP_STATINC(IPCOMP_STAT_NOXFORM); 541 DPRINTF("crypto error %d\n", crp->crp_etype); 542 goto bad; 543 } 544 545 IPCOMP_STATINC(IPCOMP_STAT_HIST + ipcomp_stats[sav->alg_comp]); 546 547 if (rlen > crp->crp_olen) { 548 /* Inject IPCOMP header */ 549 mo = m_makespace(m, skip, IPCOMP_HLENGTH, &roff); 550 if (mo == NULL) { 551 IPCOMP_STATINC(IPCOMP_STAT_WRAP); 552 DPRINTF("failed to inject IPCOMP header for " 553 "IPCA %s/%08lx\n", 554 ipsec_address(&sav->sah->saidx.dst, buf, 555 sizeof(buf)), (u_long) ntohl(sav->spi)); 556 goto bad; 557 } 558 ipcomp = (struct ipcomp *)(mtod(mo, char *) + roff); 559 560 /* Initialize the IPCOMP header */ 561 /* XXX alignment always correct? */ 562 switch (sav->sah->saidx.dst.sa.sa_family) { 563#ifdef INET 564 case AF_INET: 565 ipcomp->comp_nxt = mtod(m, struct ip *)->ip_p; 566 break; 567#endif 568#ifdef INET6 569 case AF_INET6: 570 ipcomp->comp_nxt = mtod(m, struct ip6_hdr *)->ip6_nxt; 571 break; 572#endif 573 } 574 ipcomp->comp_flags = 0; 575 576 cpi = ntohl(sav->spi) & 0xffff; 577 ipcomp->comp_cpi = htons(cpi); 578 579 /* Fix Next Protocol in IPv4/IPv6 header */ 580 prot = IPPROTO_IPCOMP; 581 m_copyback(m, tc->tc_protoff, sizeof(prot), &prot); 582 583 /* Adjust the length in the IP header */ 584 switch (sav->sah->saidx.dst.sa.sa_family) { 585#ifdef INET 586 case AF_INET: 587 mtod(m, struct ip *)->ip_len = htons(m->m_pkthdr.len); 588 break; 589#endif 590#ifdef INET6 591 case AF_INET6: 592 mtod(m, struct ip6_hdr *)->ip6_plen = 593 htons(m->m_pkthdr.len - sizeof(struct ip6_hdr)); 594 break; 595#endif 596 default: 597 IPCOMP_STATINC(IPCOMP_STAT_NOPF); 598 DPRINTF("unknown/unsupported protocol " 599 "family %d, IPCA %s/%08lx\n", 600 sav->sah->saidx.dst.sa.sa_family, 601 ipsec_address(&sav->sah->saidx.dst, buf, 602 sizeof(buf)), (u_long) ntohl(sav->spi)); 603 goto bad; 604 } 605 } else { 606 /* compression was useless, we have lost time */ 607 IPCOMP_STATINC(IPCOMP_STAT_USELESS); 608 DPRINTF("compression was useless: initial size was %d " 609 "and compressed size is %d\n", rlen, crp->crp_olen); 610 } 611 612 flags = tc->tc_flags; 613 /* Release the crypto descriptor */ 614 pool_cache_put(ipcomp_tdb_crypto_pool_cache, tc); 615 crypto_freereq(crp); 616 617 /* NB: m is reclaimed by ipsec_process_done. */ 618 (void)ipsec_process_done(m, isr, sav, flags); 619 KEY_SA_UNREF(&sav); 620 KEY_SP_UNREF(&isr->sp); 621 IPSEC_RELEASE_GLOBAL_LOCKS(); 622 return; 623 624bad: 625 if (sav) 626 KEY_SA_UNREF(&sav); 627 KEY_SP_UNREF(&isr->sp); 628 IPSEC_RELEASE_GLOBAL_LOCKS(); 629 if (m) 630 m_freem(m); 631 pool_cache_put(ipcomp_tdb_crypto_pool_cache, tc); 632 crypto_freereq(crp); 633} 634 635static struct xformsw ipcomp_xformsw = { 636 .xf_type = XF_IPCOMP, 637 .xf_flags = XFT_COMP, 638 .xf_name = "IPcomp", 639 .xf_init = ipcomp_init, 640 .xf_zeroize = ipcomp_zeroize, 641 .xf_input = ipcomp_input, 642 .xf_output = ipcomp_output, 643 .xf_next = NULL, 644}; 645 646void 647ipcomp_attach(void) 648{ 649 ipcompstat_percpu = percpu_alloc(sizeof(uint64_t) * IPCOMP_NSTATS); 650 ipcomp_tdb_crypto_pool_cache = pool_cache_init(sizeof(struct tdb_crypto), 651 coherency_unit, 0, 0, "ipcomp_tdb_crypto", NULL, IPL_SOFTNET, 652 NULL, NULL, NULL); 653 xform_register(&ipcomp_xformsw); 654} 655