xform_ipcomp.c revision 1.20
1 /* $NetBSD: xform_ipcomp.c,v 1.20 2010/09/21 13:41:18 degroote 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 1.20 2010/09/21 13:41:18 degroote Exp $"); 34 35 /* IP payload compression protocol (IPComp), see RFC 2393 */ 36 #include "opt_inet.h" 37 #ifdef __FreeBSD__ 38 #include "opt_inet6.h" 39 #endif 40 41 #include <sys/param.h> 42 #include <sys/systm.h> 43 #include <sys/mbuf.h> 44 #include <sys/socket.h> 45 #include <sys/kernel.h> 46 #include <sys/protosw.h> 47 #include <sys/sysctl.h> 48 49 #include <netinet/in.h> 50 #include <netinet/in_systm.h> 51 #include <netinet/ip.h> 52 #include <netinet/ip_var.h> 53 54 #include <net/route.h> 55 #include <netipsec/ipsec.h> 56 #include <netipsec/ipsec_private.h> 57 #include <netipsec/xform.h> 58 59 #ifdef INET6 60 #include <netinet/ip6.h> 61 #include <netipsec/ipsec6.h> 62 #endif 63 64 #include <netipsec/ipcomp.h> 65 #include <netipsec/ipcomp_var.h> 66 67 #include <netipsec/key.h> 68 #include <netipsec/key_debug.h> 69 70 #include <netipsec/ipsec_osdep.h> 71 72 #include <opencrypto/cryptodev.h> 73 #include <opencrypto/deflate.h> 74 #include <opencrypto/xform.h> 75 76 percpu_t *ipcompstat_percpu; 77 78 int ipcomp_enable = 1; 79 80 #ifdef __FreeBSD__ 81 SYSCTL_DECL(_net_inet_ipcomp); 82 SYSCTL_INT(_net_inet_ipcomp, OID_AUTO, 83 ipcomp_enable, CTLFLAG_RW, &ipcomp_enable, 0, ""); 84 SYSCTL_STRUCT(_net_inet_ipcomp, IPSECCTL_STATS, 85 stats, CTLFLAG_RD, &ipcompstat, ipcompstat, ""); 86 #endif /* __FreeBSD__ */ 87 88 static int ipcomp_input_cb(struct cryptop *crp); 89 static int ipcomp_output_cb(struct cryptop *crp); 90 91 struct comp_algo * 92 ipcomp_algorithm_lookup(int alg) 93 { 94 if (alg >= IPCOMP_ALG_MAX) 95 return NULL; 96 switch (alg) { 97 case SADB_X_CALG_DEFLATE: 98 return &comp_algo_deflate; 99 } 100 return NULL; 101 } 102 103 /* 104 * ipcomp_init() is called when an CPI is being set up. 105 */ 106 static int 107 ipcomp_init(struct secasvar *sav, struct xformsw *xsp) 108 { 109 struct comp_algo *tcomp; 110 struct cryptoini cric; 111 int ses; 112 113 /* NB: algorithm really comes in alg_enc and not alg_comp! */ 114 tcomp = ipcomp_algorithm_lookup(sav->alg_enc); 115 if (tcomp == NULL) { 116 DPRINTF(("ipcomp_init: unsupported compression algorithm %d\n", 117 sav->alg_comp)); 118 return EINVAL; 119 } 120 sav->alg_comp = sav->alg_enc; /* set for doing histogram */ 121 sav->tdb_xform = xsp; 122 sav->tdb_compalgxform = tcomp; 123 124 /* Initialize crypto session */ 125 memset(&cric, 0, sizeof (cric)); 126 cric.cri_alg = sav->tdb_compalgxform->type; 127 128 mutex_spin_enter(&crypto_mtx); 129 ses = crypto_newsession(&sav->tdb_cryptoid, &cric, crypto_support); 130 mutex_spin_exit(&crypto_mtx); 131 return ses; 132 } 133 134 /* 135 * ipcomp_zeroize() used when IPCA is deleted 136 */ 137 static int 138 ipcomp_zeroize(struct secasvar *sav) 139 { 140 int err; 141 142 mutex_spin_enter(&crypto_mtx); 143 err = crypto_freesession(sav->tdb_cryptoid); 144 mutex_spin_exit(&crypto_mtx); 145 sav->tdb_cryptoid = 0; 146 return err; 147 } 148 149 /* 150 * ipcomp_input() gets called to uncompress an input packet 151 */ 152 static int 153 ipcomp_input(struct mbuf *m, struct secasvar *sav, int skip, int protoff) 154 { 155 struct tdb_crypto *tc; 156 struct cryptodesc *crdc; 157 struct cryptop *crp; 158 int hlen = IPCOMP_HLENGTH; 159 160 IPSEC_SPLASSERT_SOFTNET("ipcomp_input"); 161 162 /* Get crypto descriptors */ 163 crp = crypto_getreq(1); 164 if (crp == NULL) { 165 m_freem(m); 166 DPRINTF(("ipcomp_input: no crypto descriptors\n")); 167 IPCOMP_STATINC(IPCOMP_STAT_CRYPTO); 168 return ENOBUFS; 169 } 170 /* Get IPsec-specific opaque pointer */ 171 tc = (struct tdb_crypto *) malloc(sizeof (*tc), M_XDATA, M_NOWAIT|M_ZERO); 172 if (tc == NULL) { 173 m_freem(m); 174 crypto_freereq(crp); 175 DPRINTF(("ipcomp_input: cannot allocate tdb_crypto\n")); 176 IPCOMP_STATINC(IPCOMP_STAT_CRYPTO); 177 return ENOBUFS; 178 } 179 crdc = crp->crp_desc; 180 181 crdc->crd_skip = skip + hlen; 182 crdc->crd_len = m->m_pkthdr.len - (skip + hlen); 183 crdc->crd_inject = skip; 184 185 tc->tc_ptr = 0; 186 187 /* Decompression operation */ 188 crdc->crd_alg = sav->tdb_compalgxform->type; 189 190 /* Crypto operation descriptor */ 191 crp->crp_ilen = m->m_pkthdr.len - (skip + hlen); 192 crp->crp_flags = CRYPTO_F_IMBUF; 193 crp->crp_buf = m; 194 crp->crp_callback = ipcomp_input_cb; 195 crp->crp_sid = sav->tdb_cryptoid; 196 crp->crp_opaque = tc; 197 198 /* These are passed as-is to the callback */ 199 tc->tc_spi = sav->spi; 200 tc->tc_dst = sav->sah->saidx.dst; 201 tc->tc_proto = sav->sah->saidx.proto; 202 tc->tc_protoff = protoff; 203 tc->tc_skip = skip; 204 205 return crypto_dispatch(crp); 206 } 207 208 #ifdef INET6 209 #define IPSEC_COMMON_INPUT_CB(m, sav, skip, protoff, mtag) do { \ 210 if (saidx->dst.sa.sa_family == AF_INET6) { \ 211 error = ipsec6_common_input_cb(m, sav, skip, protoff, mtag); \ 212 } else { \ 213 error = ipsec4_common_input_cb(m, sav, skip, protoff, mtag); \ 214 } \ 215 } while (0) 216 #else 217 #define IPSEC_COMMON_INPUT_CB(m, sav, skip, protoff, mtag) \ 218 (error = ipsec4_common_input_cb(m, sav, skip, protoff, mtag)) 219 #endif 220 221 /* 222 * IPComp input callback from the crypto driver. 223 */ 224 static int 225 ipcomp_input_cb(struct cryptop *crp) 226 { 227 struct cryptodesc *crd; 228 struct tdb_crypto *tc; 229 int skip, protoff; 230 struct mtag *mtag; 231 struct mbuf *m; 232 struct secasvar *sav; 233 struct secasindex *saidx; 234 int s, hlen = IPCOMP_HLENGTH, error, clen; 235 u_int8_t nproto; 236 void *addr; 237 u_int16_t dport = 0; 238 u_int16_t sport = 0; 239 #ifdef IPSEC_NAT_T 240 struct m_tag * tag = NULL; 241 #endif 242 243 crd = crp->crp_desc; 244 245 tc = (struct tdb_crypto *) crp->crp_opaque; 246 IPSEC_ASSERT(tc != NULL, ("ipcomp_input_cb: null opaque crypto data area!")); 247 skip = tc->tc_skip; 248 protoff = tc->tc_protoff; 249 mtag = (struct mtag *) tc->tc_ptr; 250 m = (struct mbuf *) crp->crp_buf; 251 252 #ifdef IPSEC_NAT_T 253 /* find the source port for NAT-T */ 254 if ((tag = m_tag_find(m, PACKET_TAG_IPSEC_NAT_T_PORTS, NULL))) { 255 sport = ((u_int16_t *)(tag + 1))[0]; 256 dport = ((u_int16_t *)(tag + 1))[1]; 257 } 258 #endif 259 260 s = splsoftnet(); 261 262 sav = KEY_ALLOCSA(&tc->tc_dst, tc->tc_proto, tc->tc_spi, sport, dport); 263 if (sav == NULL) { 264 IPCOMP_STATINC(IPCOMP_STAT_NOTDB); 265 DPRINTF(("ipcomp_input_cb: SA expired while in crypto\n")); 266 error = ENOBUFS; /*XXX*/ 267 goto bad; 268 } 269 270 saidx = &sav->sah->saidx; 271 IPSEC_ASSERT(saidx->dst.sa.sa_family == AF_INET || 272 saidx->dst.sa.sa_family == AF_INET6, 273 ("ah_input_cb: unexpected protocol family %u", 274 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_FREESAV(&sav); 284 splx(s); 285 return crypto_dispatch(crp); 286 } 287 288 IPCOMP_STATINC(IPCOMP_STAT_NOXFORM); 289 DPRINTF(("ipcomp_input_cb: crypto error %d\n", crp->crp_etype)); 290 error = crp->crp_etype; 291 goto bad; 292 } 293 /* Shouldn't happen... */ 294 if (m == NULL) { 295 IPCOMP_STATINC(IPCOMP_STAT_CRYPTO); 296 DPRINTF(("ipcomp_input_cb: null mbuf returned from crypto\n")); 297 error = EINVAL; 298 goto bad; 299 } 300 IPCOMP_STATINC(IPCOMP_STAT_HIST + sav->alg_comp); 301 302 /* Update the counters */ 303 IPCOMP_STATADD(IPCOMP_STAT_IBYTES, m->m_pkthdr.len - skip - hlen); 304 305 306 clen = crp->crp_olen; /* Length of data after processing */ 307 308 /* Release the crypto descriptors */ 309 free(tc, M_XDATA), tc = NULL; 310 crypto_freereq(crp), crp = NULL; 311 312 /* In case it's not done already, adjust the size of the mbuf chain */ 313 m->m_pkthdr.len = clen + hlen + skip; 314 315 if (m->m_len < skip + hlen && (m = m_pullup(m, skip + hlen)) == 0) { 316 IPCOMP_STATINC(IPCOMP_STAT_HDROPS); /*XXX*/ 317 DPRINTF(("ipcomp_input_cb: m_pullup failed\n")); 318 error = EINVAL; /*XXX*/ 319 goto bad; 320 } 321 322 /* Keep the next protocol field */ 323 addr = (uint8_t*) mtod(m, struct ip *) + skip; 324 nproto = ((struct ipcomp *) addr)->comp_nxt; 325 326 /* Remove the IPCOMP header */ 327 error = m_striphdr(m, skip, hlen); 328 if (error) { 329 IPCOMP_STATINC(IPCOMP_STAT_HDROPS); 330 DPRINTF(("ipcomp_input_cb: bad mbuf chain, IPCA %s/%08lx\n", 331 ipsec_address(&sav->sah->saidx.dst), 332 (u_long) ntohl(sav->spi))); 333 goto bad; 334 } 335 336 /* Restore the Next Protocol field */ 337 m_copyback(m, protoff, sizeof (u_int8_t), (u_int8_t *) &nproto); 338 339 IPSEC_COMMON_INPUT_CB(m, sav, skip, protoff, NULL); 340 341 KEY_FREESAV(&sav); 342 splx(s); 343 return error; 344 bad: 345 if (sav) 346 KEY_FREESAV(&sav); 347 splx(s); 348 if (m) 349 m_freem(m); 350 if (tc != NULL) 351 free(tc, M_XDATA); 352 if (crp) 353 crypto_freereq(crp); 354 return error; 355 } 356 357 /* 358 * IPComp output routine, called by ipsec[46]_process_packet() 359 */ 360 static int 361 ipcomp_output( 362 struct mbuf *m, 363 struct ipsecrequest *isr, 364 struct mbuf **mp, 365 int skip, 366 int protoff 367 ) 368 { 369 struct secasvar *sav; 370 struct comp_algo *ipcompx; 371 int error, ralen, hlen, maxpacketsize; 372 struct cryptodesc *crdc; 373 struct cryptop *crp; 374 struct tdb_crypto *tc; 375 376 IPSEC_SPLASSERT_SOFTNET("ipcomp_output"); 377 sav = isr->sav; 378 IPSEC_ASSERT(sav != NULL, ("ipcomp_output: null SA")); 379 ipcompx = sav->tdb_compalgxform; 380 IPSEC_ASSERT(ipcompx != NULL, ("ipcomp_output: null compression xform")); 381 382 ralen = m->m_pkthdr.len - skip; /* Raw payload length before comp. */ 383 384 /* Don't process the packet if it is too short */ 385 if (ralen < ipcompx->minlen) { 386 IPCOMP_STATINC(IPCOMP_STAT_MINLEN); 387 return ipsec_process_done(m,isr); 388 } 389 390 hlen = IPCOMP_HLENGTH; 391 392 IPCOMP_STATINC(IPCOMP_STAT_OUTPUT); 393 394 /* Check for maximum packet size violations. */ 395 switch (sav->sah->saidx.dst.sa.sa_family) { 396 #ifdef INET 397 case AF_INET: 398 maxpacketsize = IP_MAXPACKET; 399 break; 400 #endif /* INET */ 401 #ifdef INET6 402 case AF_INET6: 403 maxpacketsize = IPV6_MAXPACKET; 404 break; 405 #endif /* INET6 */ 406 default: 407 IPCOMP_STATINC(IPCOMP_STAT_NOPF); 408 DPRINTF(("ipcomp_output: unknown/unsupported protocol family %d" 409 ", IPCA %s/%08lx\n", 410 sav->sah->saidx.dst.sa.sa_family, 411 ipsec_address(&sav->sah->saidx.dst), 412 (u_long) ntohl(sav->spi))); 413 error = EPFNOSUPPORT; 414 goto bad; 415 } 416 if (skip + hlen + ralen > maxpacketsize) { 417 IPCOMP_STATINC(IPCOMP_STAT_TOOBIG); 418 DPRINTF(("ipcomp_output: packet in IPCA %s/%08lx got too big " 419 "(len %u, max len %u)\n", 420 ipsec_address(&sav->sah->saidx.dst), 421 (u_long) ntohl(sav->spi), 422 skip + hlen + ralen, maxpacketsize)); 423 error = EMSGSIZE; 424 goto bad; 425 } 426 427 /* Update the counters */ 428 IPCOMP_STATADD(IPCOMP_STAT_OBYTES, m->m_pkthdr.len - skip); 429 430 m = m_clone(m); 431 if (m == NULL) { 432 IPCOMP_STATINC(IPCOMP_STAT_HDROPS); 433 DPRINTF(("ipcomp_output: cannot clone mbuf chain, IPCA %s/%08lx\n", 434 ipsec_address(&sav->sah->saidx.dst), 435 (u_long) ntohl(sav->spi))); 436 error = ENOBUFS; 437 goto bad; 438 } 439 440 /* Ok now, we can pass to the crypto processing */ 441 442 /* Get crypto descriptors */ 443 crp = crypto_getreq(1); 444 if (crp == NULL) { 445 IPCOMP_STATINC(IPCOMP_STAT_CRYPTO); 446 DPRINTF(("ipcomp_output: failed to acquire crypto descriptor\n")); 447 error = ENOBUFS; 448 goto bad; 449 } 450 crdc = crp->crp_desc; 451 452 /* Compression descriptor */ 453 crdc->crd_skip = skip; 454 crdc->crd_len = m->m_pkthdr.len - skip; 455 crdc->crd_flags = CRD_F_COMP; 456 crdc->crd_inject = skip; 457 458 /* Compression operation */ 459 crdc->crd_alg = ipcompx->type; 460 461 /* IPsec-specific opaque crypto info */ 462 tc = (struct tdb_crypto *) malloc(sizeof(struct tdb_crypto), 463 M_XDATA, M_NOWAIT|M_ZERO); 464 if (tc == NULL) { 465 IPCOMP_STATINC(IPCOMP_STAT_CRYPTO); 466 DPRINTF(("ipcomp_output: failed to allocate tdb_crypto\n")); 467 crypto_freereq(crp); 468 error = ENOBUFS; 469 goto bad; 470 } 471 472 tc->tc_isr = isr; 473 tc->tc_spi = sav->spi; 474 tc->tc_dst = sav->sah->saidx.dst; 475 tc->tc_proto = sav->sah->saidx.proto; 476 tc->tc_skip = skip; 477 tc->tc_protoff = protoff; 478 479 /* Crypto operation descriptor */ 480 crp->crp_ilen = m->m_pkthdr.len; /* Total input length */ 481 crp->crp_flags = CRYPTO_F_IMBUF; 482 crp->crp_buf = m; 483 crp->crp_callback = ipcomp_output_cb; 484 crp->crp_opaque = tc; 485 crp->crp_sid = sav->tdb_cryptoid; 486 487 return crypto_dispatch(crp); 488 bad: 489 if (m) 490 m_freem(m); 491 return (error); 492 } 493 494 /* 495 * IPComp output callback from the crypto driver. 496 */ 497 static int 498 ipcomp_output_cb(struct cryptop *crp) 499 { 500 struct tdb_crypto *tc; 501 struct ipsecrequest *isr; 502 struct secasvar *sav; 503 struct mbuf *m, *mo; 504 int s, error, skip, rlen, roff; 505 u_int8_t prot; 506 u_int16_t cpi; 507 struct ipcomp * ipcomp; 508 509 510 tc = (struct tdb_crypto *) crp->crp_opaque; 511 IPSEC_ASSERT(tc != NULL, ("ipcomp_output_cb: null opaque data area!")); 512 m = (struct mbuf *) crp->crp_buf; 513 skip = tc->tc_skip; 514 rlen = crp->crp_ilen - skip; 515 516 s = splsoftnet(); 517 518 isr = tc->tc_isr; 519 sav = KEY_ALLOCSA(&tc->tc_dst, tc->tc_proto, tc->tc_spi, 0, 0); 520 if (sav == NULL) { 521 IPCOMP_STATINC(IPCOMP_STAT_NOTDB); 522 DPRINTF(("ipcomp_output_cb: SA expired while in crypto\n")); 523 error = ENOBUFS; /*XXX*/ 524 goto bad; 525 } 526 IPSEC_ASSERT(isr->sav == sav, ("ipcomp_output_cb: SA changed\n")); 527 528 /* Check for crypto errors */ 529 if (crp->crp_etype) { 530 /* Reset session ID */ 531 if (sav->tdb_cryptoid != 0) 532 sav->tdb_cryptoid = crp->crp_sid; 533 534 if (crp->crp_etype == EAGAIN) { 535 KEY_FREESAV(&sav); 536 splx(s); 537 return crypto_dispatch(crp); 538 } 539 IPCOMP_STATINC(IPCOMP_STAT_NOXFORM); 540 DPRINTF(("ipcomp_output_cb: crypto error %d\n", crp->crp_etype)); 541 error = crp->crp_etype; 542 goto bad; 543 } 544 /* Shouldn't happen... */ 545 if (m == NULL) { 546 IPCOMP_STATINC(IPCOMP_STAT_CRYPTO); 547 DPRINTF(("ipcomp_output_cb: bogus return buffer from crypto\n")); 548 error = EINVAL; 549 goto bad; 550 } 551 IPCOMP_STATINC(IPCOMP_STAT_HIST + sav->alg_comp); 552 553 if (rlen > crp->crp_olen) { 554 /* Inject IPCOMP header */ 555 mo = m_makespace(m, skip, IPCOMP_HLENGTH, &roff); 556 if (mo == NULL) { 557 IPCOMP_STATINC(IPCOMP_STAT_WRAP); 558 DPRINTF(("ipcomp_output: failed to inject IPCOMP header for " 559 "IPCA %s/%08lx\n", 560 ipsec_address(&sav->sah->saidx.dst), 561 (u_long) ntohl(sav->spi))); 562 error = ENOBUFS; 563 goto bad; 564 } 565 ipcomp = (struct ipcomp *)(mtod(mo, char *) + roff); 566 567 /* Initialize the IPCOMP header */ 568 /* XXX alignment always correct? */ 569 switch (sav->sah->saidx.dst.sa.sa_family) { 570 #ifdef INET 571 case AF_INET: 572 ipcomp->comp_nxt = mtod(m, struct ip *)->ip_p; 573 break; 574 #endif /* INET */ 575 #ifdef INET6 576 case AF_INET6: 577 ipcomp->comp_nxt = mtod(m, struct ip6_hdr *)->ip6_nxt; 578 break; 579 #endif 580 } 581 ipcomp->comp_flags = 0; 582 583 if ((sav->flags & SADB_X_EXT_RAWCPI) == 0) 584 cpi = sav->alg_enc; 585 else 586 cpi = ntohl(sav->spi) & 0xffff; 587 ipcomp->comp_cpi = htons(cpi); 588 589 /* Fix Next Protocol in IPv4/IPv6 header */ 590 prot = IPPROTO_IPCOMP; 591 m_copyback(m, tc->tc_protoff, sizeof(u_int8_t), (u_char *)&prot); 592 593 /* Adjust the length in the IP header */ 594 switch (sav->sah->saidx.dst.sa.sa_family) { 595 #ifdef INET 596 case AF_INET: 597 mtod(m, struct ip *)->ip_len = htons(m->m_pkthdr.len); 598 break; 599 #endif /* INET */ 600 #ifdef INET6 601 case AF_INET6: 602 mtod(m, struct ip6_hdr *)->ip6_plen = 603 htons(m->m_pkthdr.len) - sizeof(struct ip6_hdr); 604 break; 605 #endif /* INET6 */ 606 default: 607 IPCOMP_STATINC(IPCOMP_STAT_NOPF); 608 DPRINTF(("ipcomp_output: unknown/unsupported protocol " 609 "family %d, IPCA %s/%08lx\n", 610 sav->sah->saidx.dst.sa.sa_family, 611 ipsec_address(&sav->sah->saidx.dst), 612 (u_long) ntohl(sav->spi))); 613 error = EPFNOSUPPORT; 614 goto bad; 615 } 616 } else { 617 /* compression was useless, we have lost time */ 618 IPCOMP_STATINC(IPCOMP_STAT_USELESS); 619 DPRINTF(("ipcomp_output_cb: compression was useless : initial size was %d" 620 "and compressed size is %d\n", rlen, crp->crp_olen)); 621 } 622 623 624 /* Release the crypto descriptor */ 625 free(tc, M_XDATA); 626 crypto_freereq(crp); 627 628 /* NB: m is reclaimed by ipsec_process_done. */ 629 error = ipsec_process_done(m, isr); 630 KEY_FREESAV(&sav); 631 splx(s); 632 return error; 633 bad: 634 if (sav) 635 KEY_FREESAV(&sav); 636 splx(s); 637 if (m) 638 m_freem(m); 639 free(tc, M_XDATA); 640 crypto_freereq(crp); 641 return error; 642 } 643 644 static struct xformsw ipcomp_xformsw = { 645 XF_IPCOMP, XFT_COMP, "IPcomp", 646 ipcomp_init, ipcomp_zeroize, ipcomp_input, 647 ipcomp_output, 648 NULL, 649 }; 650 651 INITFN void 652 ipcomp_attach(void) 653 { 654 ipcompstat_percpu = percpu_alloc(sizeof(uint64_t) * IPCOMP_NSTATS); 655 xform_register(&ipcomp_xformsw); 656 } 657 658 #ifdef __FreeBSD__ 659 SYSINIT(ipcomp_xform_init, SI_SUB_DRIVERS, SI_ORDER_FIRST, ipcomp_attach, NULL) 660 #endif /* __FreeBSD__ */ 661
Indexes created Mon Sep 22 21:09:42 GMT 2025