xform_ipcomp.c revision 1.38
1 /* $NetBSD: xform_ipcomp.c,v 1.38 2017/05/11 05:55:14 ryo 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 1.38 2017/05/11 05:55:14 ryo 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/socketvar.h> /* for softnet_lock */ 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 <opencrypto/cryptodev.h> 71 #include <opencrypto/deflate.h> 72 #include <opencrypto/xform.h> 73 74 percpu_t *ipcompstat_percpu; 75 76 int ipcomp_enable = 1; 77 78 #ifdef __FreeBSD__ 79 SYSCTL_DECL(_net_inet_ipcomp); 80 SYSCTL_INT(_net_inet_ipcomp, OID_AUTO, 81 ipcomp_enable, CTLFLAG_RW, &ipcomp_enable, 0, ""); 82 SYSCTL_STRUCT(_net_inet_ipcomp, IPSECCTL_STATS, 83 stats, CTLFLAG_RD, &ipcompstat, ipcompstat, ""); 84 #endif /* __FreeBSD__ */ 85 86 static int ipcomp_input_cb(struct cryptop *crp); 87 static int ipcomp_output_cb(struct cryptop *crp); 88 89 const uint8_t ipcomp_stats[256] = { SADB_CALG_STATS_INIT }; 90 91 const struct comp_algo * 92 ipcomp_algorithm_lookup(int alg) 93 { 94 switch (alg) { 95 case SADB_X_CALG_DEFLATE: 96 return &comp_algo_deflate_nogrow; 97 } 98 return NULL; 99 } 100 101 /* 102 * ipcomp_init() is called when an CPI is being set up. 103 */ 104 static int 105 ipcomp_init(struct secasvar *sav, const struct xformsw *xsp) 106 { 107 const struct comp_algo *tcomp; 108 struct cryptoini cric; 109 int ses; 110 111 /* NB: algorithm really comes in alg_enc and not alg_comp! */ 112 tcomp = ipcomp_algorithm_lookup(sav->alg_enc); 113 if (tcomp == NULL) { 114 DPRINTF(("%s: unsupported compression algorithm %d\n", 115 __func__, sav->alg_comp)); 116 return EINVAL; 117 } 118 sav->alg_comp = sav->alg_enc; /* set for doing histogram */ 119 sav->tdb_xform = xsp; 120 sav->tdb_compalgxform = tcomp; 121 122 /* Initialize crypto session */ 123 memset(&cric, 0, sizeof(cric)); 124 cric.cri_alg = sav->tdb_compalgxform->type; 125 126 ses = crypto_newsession(&sav->tdb_cryptoid, &cric, crypto_support); 127 return ses; 128 } 129 130 /* 131 * ipcomp_zeroize() used when IPCA is deleted 132 */ 133 static int 134 ipcomp_zeroize(struct secasvar *sav) 135 { 136 int err; 137 138 err = crypto_freesession(sav->tdb_cryptoid); 139 sav->tdb_cryptoid = 0; 140 return err; 141 } 142 143 /* 144 * ipcomp_input() gets called to uncompress an input packet 145 */ 146 static int 147 ipcomp_input(struct mbuf *m, const struct secasvar *sav, int skip, int protoff) 148 { 149 struct tdb_crypto *tc; 150 struct cryptodesc *crdc; 151 struct cryptop *crp; 152 int error, hlen = IPCOMP_HLENGTH; 153 154 IPSEC_SPLASSERT_SOFTNET(__func__); 155 156 /* Get crypto descriptors */ 157 crp = crypto_getreq(1); 158 if (crp == NULL) { 159 m_freem(m); 160 DPRINTF(("%s: no crypto descriptors\n", __func__)); 161 IPCOMP_STATINC(IPCOMP_STAT_CRYPTO); 162 return ENOBUFS; 163 } 164 /* Get IPsec-specific opaque pointer */ 165 tc = malloc(sizeof(*tc), M_XDATA, M_NOWAIT|M_ZERO); 166 if (tc == NULL) { 167 m_freem(m); 168 crypto_freereq(crp); 169 DPRINTF(("%s: cannot allocate tdb_crypto\n", __func__)); 170 IPCOMP_STATINC(IPCOMP_STAT_CRYPTO); 171 return ENOBUFS; 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 m_freem(m); 178 free(tc, M_XDATA); 179 crypto_freereq(crp); 180 IPCOMP_STATINC(IPCOMP_STAT_CRYPTO); 181 return error; 182 } 183 184 crdc = crp->crp_desc; 185 186 crdc->crd_skip = skip + hlen; 187 crdc->crd_len = m->m_pkthdr.len - (skip + hlen); 188 crdc->crd_inject = 0; /* unused */ 189 190 tc->tc_ptr = 0; 191 192 /* Decompression operation */ 193 crdc->crd_alg = sav->tdb_compalgxform->type; 194 195 /* Crypto operation descriptor */ 196 crp->crp_ilen = m->m_pkthdr.len - (skip + hlen); 197 crp->crp_olen = MCLBYTES; /* hint to decompression code */ 198 crp->crp_flags = CRYPTO_F_IMBUF; 199 crp->crp_buf = m; 200 crp->crp_callback = ipcomp_input_cb; 201 crp->crp_sid = sav->tdb_cryptoid; 202 crp->crp_opaque = tc; 203 204 /* These are passed as-is to the callback */ 205 tc->tc_spi = sav->spi; 206 tc->tc_dst = sav->sah->saidx.dst; 207 tc->tc_proto = sav->sah->saidx.proto; 208 tc->tc_protoff = protoff; 209 tc->tc_skip = skip; 210 211 return crypto_dispatch(crp); 212 } 213 214 #ifdef INET6 215 #define IPSEC_COMMON_INPUT_CB(m, sav, skip, protoff, mtag) do { \ 216 if (saidx->dst.sa.sa_family == AF_INET6) { \ 217 error = ipsec6_common_input_cb(m, sav, skip, protoff, mtag); \ 218 } else { \ 219 error = ipsec4_common_input_cb(m, sav, skip, protoff, mtag); \ 220 } \ 221 } while (0) 222 #else 223 #define IPSEC_COMMON_INPUT_CB(m, sav, skip, protoff, mtag) \ 224 (error = ipsec4_common_input_cb(m, sav, skip, protoff, mtag)) 225 #endif 226 227 /* 228 * IPComp input callback from the crypto driver. 229 */ 230 static int 231 ipcomp_input_cb(struct cryptop *crp) 232 { 233 char buf[IPSEC_ADDRSTRLEN]; 234 struct tdb_crypto *tc; 235 int skip, protoff; 236 struct mbuf *m; 237 struct secasvar *sav; 238 struct secasindex *saidx __diagused; 239 int s, hlen = IPCOMP_HLENGTH, error, clen; 240 uint8_t nproto; 241 void *addr; 242 uint16_t dport; 243 uint16_t sport; 244 245 KASSERT(crp->crp_opaque != NULL); 246 tc = crp->crp_opaque; 247 skip = tc->tc_skip; 248 protoff = tc->tc_protoff; 249 m = crp->crp_buf; 250 251 /* find the source port for NAT-T */ 252 nat_t_ports_get(m, &dport, &sport); 253 254 s = splsoftnet(); 255 mutex_enter(softnet_lock); 256 257 sav = KEY_ALLOCSA(&tc->tc_dst, tc->tc_proto, tc->tc_spi, sport, dport); 258 if (sav == NULL) { 259 IPCOMP_STATINC(IPCOMP_STAT_NOTDB); 260 DPRINTF(("%s: SA expired while in crypto\n", __func__)); 261 error = ENOBUFS; /*XXX*/ 262 goto bad; 263 } 264 265 saidx = &sav->sah->saidx; 266 KASSERTMSG(saidx->dst.sa.sa_family == AF_INET || 267 saidx->dst.sa.sa_family == AF_INET6, 268 "unexpected protocol family %u", saidx->dst.sa.sa_family); 269 270 /* Check for crypto errors */ 271 if (crp->crp_etype) { 272 /* Reset the session ID */ 273 if (sav->tdb_cryptoid != 0) 274 sav->tdb_cryptoid = crp->crp_sid; 275 276 if (crp->crp_etype == EAGAIN) { 277 KEY_FREESAV(&sav); 278 mutex_exit(softnet_lock); 279 splx(s); 280 return crypto_dispatch(crp); 281 } 282 283 IPCOMP_STATINC(IPCOMP_STAT_NOXFORM); 284 DPRINTF(("%s: crypto error %d\n", __func__, crp->crp_etype)); 285 error = crp->crp_etype; 286 goto bad; 287 } 288 /* Shouldn't happen... */ 289 if (m == NULL) { 290 IPCOMP_STATINC(IPCOMP_STAT_CRYPTO); 291 DPRINTF(("%s: null mbuf returned from crypto\n", __func__)); 292 error = EINVAL; 293 goto bad; 294 } 295 IPCOMP_STATINC(IPCOMP_STAT_HIST + ipcomp_stats[sav->alg_comp]); 296 297 /* Update the counters */ 298 IPCOMP_STATADD(IPCOMP_STAT_IBYTES, m->m_pkthdr.len - skip - hlen); 299 300 301 clen = crp->crp_olen; /* Length of data after processing */ 302 303 /* Release the crypto descriptors */ 304 free(tc, M_XDATA), tc = NULL; 305 crypto_freereq(crp), crp = NULL; 306 307 /* In case it's not done already, adjust the size of the mbuf chain */ 308 m->m_pkthdr.len = clen + hlen + skip; 309 310 if (m->m_len < skip + hlen && (m = m_pullup(m, skip + hlen)) == 0) { 311 IPCOMP_STATINC(IPCOMP_STAT_HDROPS); /*XXX*/ 312 DPRINTF(("%s: m_pullup failed\n", __func__)); 313 error = EINVAL; /*XXX*/ 314 goto bad; 315 } 316 317 /* Keep the next protocol field */ 318 addr = (uint8_t*) mtod(m, struct ip *) + skip; 319 nproto = ((struct ipcomp *) addr)->comp_nxt; 320 switch (nproto) { 321 case IPPROTO_IPCOMP: 322 case IPPROTO_AH: 323 case IPPROTO_ESP: 324 IPCOMP_STATINC(IPCOMP_STAT_HDROPS); 325 DPRINTF(("%s: nested ipcomp, IPCA %s/%08lx\n", __func__, 326 ipsec_address(&sav->sah->saidx.dst, buf, sizeof(buf)), 327 (u_long) ntohl(sav->spi))); 328 error = EINVAL; 329 goto bad; 330 default: 331 break; 332 } 333 334 /* Remove the IPCOMP header */ 335 error = m_striphdr(m, skip, hlen); 336 if (error) { 337 IPCOMP_STATINC(IPCOMP_STAT_HDROPS); 338 DPRINTF(("%s: bad mbuf chain, IPCA %s/%08lx\n", __func__, 339 ipsec_address(&sav->sah->saidx.dst, buf, sizeof(buf)), 340 (u_long) ntohl(sav->spi))); 341 goto bad; 342 } 343 344 /* Restore the Next Protocol field */ 345 m_copyback(m, protoff, sizeof(uint8_t), (uint8_t *) &nproto); 346 347 IPSEC_COMMON_INPUT_CB(m, sav, skip, protoff, NULL); 348 349 KEY_FREESAV(&sav); 350 mutex_exit(softnet_lock); 351 splx(s); 352 return error; 353 bad: 354 if (sav) 355 KEY_FREESAV(&sav); 356 mutex_exit(softnet_lock); 357 splx(s); 358 if (m) 359 m_freem(m); 360 if (tc != NULL) 361 free(tc, M_XDATA); 362 if (crp) 363 crypto_freereq(crp); 364 return error; 365 } 366 367 /* 368 * IPComp output routine, called by ipsec[46]_process_packet() 369 */ 370 static int 371 ipcomp_output( 372 struct mbuf *m, 373 struct ipsecrequest *isr, 374 struct mbuf **mp, 375 int skip, 376 int protoff 377 ) 378 { 379 char buf[IPSEC_ADDRSTRLEN]; 380 const struct secasvar *sav; 381 const struct comp_algo *ipcompx; 382 int error, ralen, hlen, maxpacketsize; 383 struct cryptodesc *crdc; 384 struct cryptop *crp; 385 struct tdb_crypto *tc; 386 387 IPSEC_SPLASSERT_SOFTNET(__func__); 388 KASSERT(isr->sav != NULL); 389 sav = isr->sav; 390 KASSERT(sav->tdb_compalgxform != NULL); 391 ipcompx = sav->tdb_compalgxform; 392 393 ralen = m->m_pkthdr.len - skip; /* Raw payload length before comp. */ 394 395 /* Don't process the packet if it is too short */ 396 if (ralen < ipcompx->minlen) { 397 IPCOMP_STATINC(IPCOMP_STAT_MINLEN); 398 return ipsec_process_done(m,isr); 399 } 400 401 hlen = IPCOMP_HLENGTH; 402 403 IPCOMP_STATINC(IPCOMP_STAT_OUTPUT); 404 405 /* Check for maximum packet size violations. */ 406 switch (sav->sah->saidx.dst.sa.sa_family) { 407 #ifdef INET 408 case AF_INET: 409 maxpacketsize = IP_MAXPACKET; 410 break; 411 #endif /* INET */ 412 #ifdef INET6 413 case AF_INET6: 414 maxpacketsize = IPV6_MAXPACKET; 415 break; 416 #endif /* INET6 */ 417 default: 418 IPCOMP_STATINC(IPCOMP_STAT_NOPF); 419 DPRINTF(("%s: unknown/unsupported protocol family %d" 420 ", IPCA %s/%08lx\n", __func__, 421 sav->sah->saidx.dst.sa.sa_family, 422 ipsec_address(&sav->sah->saidx.dst, buf, sizeof(buf)), 423 (u_long) ntohl(sav->spi))); 424 error = EPFNOSUPPORT; 425 goto bad; 426 } 427 if (skip + hlen + ralen > maxpacketsize) { 428 IPCOMP_STATINC(IPCOMP_STAT_TOOBIG); 429 DPRINTF(("%s: packet in IPCA %s/%08lx got too big " 430 "(len %u, max len %u)\n", __func__, 431 ipsec_address(&sav->sah->saidx.dst, buf, sizeof(buf)), 432 (u_long) ntohl(sav->spi), 433 skip + hlen + ralen, maxpacketsize)); 434 error = EMSGSIZE; 435 goto bad; 436 } 437 438 /* Update the counters */ 439 IPCOMP_STATADD(IPCOMP_STAT_OBYTES, m->m_pkthdr.len - skip); 440 441 m = m_clone(m); 442 if (m == NULL) { 443 IPCOMP_STATINC(IPCOMP_STAT_HDROPS); 444 DPRINTF(("%s: cannot clone mbuf chain, IPCA %s/%08lx\n", 445 __func__, 446 ipsec_address(&sav->sah->saidx.dst, buf, sizeof(buf)), 447 (u_long) ntohl(sav->spi))); 448 error = ENOBUFS; 449 goto bad; 450 } 451 452 /* Ok now, we can pass to the crypto processing */ 453 454 /* Get crypto descriptors */ 455 crp = crypto_getreq(1); 456 if (crp == NULL) { 457 IPCOMP_STATINC(IPCOMP_STAT_CRYPTO); 458 DPRINTF(("%s: failed to acquire crypto descriptor\n", 459 __func__)); 460 error = ENOBUFS; 461 goto bad; 462 } 463 crdc = crp->crp_desc; 464 465 /* Compression descriptor */ 466 crdc->crd_skip = skip; 467 crdc->crd_len = m->m_pkthdr.len - skip; 468 crdc->crd_flags = CRD_F_COMP; 469 crdc->crd_inject = skip; 470 471 /* Compression operation */ 472 crdc->crd_alg = ipcompx->type; 473 474 /* IPsec-specific opaque crypto info */ 475 tc = malloc(sizeof(*tc), M_XDATA, M_NOWAIT|M_ZERO); 476 if (tc == NULL) { 477 IPCOMP_STATINC(IPCOMP_STAT_CRYPTO); 478 DPRINTF(("%s: failed to allocate tdb_crypto\n", __func__)); 479 crypto_freereq(crp); 480 error = ENOBUFS; 481 goto bad; 482 } 483 484 tc->tc_isr = isr; 485 tc->tc_spi = sav->spi; 486 tc->tc_dst = sav->sah->saidx.dst; 487 tc->tc_proto = sav->sah->saidx.proto; 488 tc->tc_skip = skip; 489 tc->tc_protoff = protoff; 490 491 /* Crypto operation descriptor */ 492 crp->crp_ilen = m->m_pkthdr.len; /* Total input length */ 493 crp->crp_flags = CRYPTO_F_IMBUF; 494 crp->crp_buf = m; 495 crp->crp_callback = ipcomp_output_cb; 496 crp->crp_opaque = tc; 497 crp->crp_sid = sav->tdb_cryptoid; 498 499 return crypto_dispatch(crp); 500 bad: 501 if (m) 502 m_freem(m); 503 return (error); 504 } 505 506 /* 507 * IPComp output callback from the crypto driver. 508 */ 509 static int 510 ipcomp_output_cb(struct cryptop *crp) 511 { 512 char buf[IPSEC_ADDRSTRLEN]; 513 struct tdb_crypto *tc; 514 struct ipsecrequest *isr; 515 struct secasvar *sav; 516 struct mbuf *m, *mo; 517 int s, error, skip, rlen, roff; 518 uint8_t prot; 519 uint16_t cpi; 520 struct ipcomp * ipcomp; 521 522 KASSERT(crp->crp_opaque != NULL); 523 tc = crp->crp_opaque; 524 m = crp->crp_buf; 525 skip = tc->tc_skip; 526 rlen = crp->crp_ilen - skip; 527 528 s = splsoftnet(); 529 mutex_enter(softnet_lock); 530 531 isr = tc->tc_isr; 532 sav = KEY_ALLOCSA(&tc->tc_dst, tc->tc_proto, tc->tc_spi, 0, 0); 533 if (sav == NULL) { 534 IPCOMP_STATINC(IPCOMP_STAT_NOTDB); 535 DPRINTF(("%s: SA expired while in crypto\n", __func__)); 536 error = ENOBUFS; /*XXX*/ 537 goto bad; 538 } 539 KASSERTMSG(isr->sav == sav, "SA changed"); 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 KEY_FREESAV(&sav); 549 mutex_exit(softnet_lock); 550 splx(s); 551 return crypto_dispatch(crp); 552 } 553 IPCOMP_STATINC(IPCOMP_STAT_NOXFORM); 554 DPRINTF(("%s: crypto error %d\n", __func__, crp->crp_etype)); 555 error = crp->crp_etype; 556 goto bad; 557 } 558 /* Shouldn't happen... */ 559 if (m == NULL) { 560 IPCOMP_STATINC(IPCOMP_STAT_CRYPTO); 561 DPRINTF(("%s: bogus return buffer from crypto\n", __func__)); 562 error = EINVAL; 563 goto bad; 564 } 565 IPCOMP_STATINC(IPCOMP_STAT_HIST + ipcomp_stats[sav->alg_comp]); 566 567 if (rlen > crp->crp_olen) { 568 /* Inject IPCOMP header */ 569 mo = m_makespace(m, skip, IPCOMP_HLENGTH, &roff); 570 if (mo == NULL) { 571 IPCOMP_STATINC(IPCOMP_STAT_WRAP); 572 DPRINTF(("%s: failed to inject IPCOMP header for " 573 "IPCA %s/%08lx\n", __func__, 574 ipsec_address(&sav->sah->saidx.dst, buf, 575 sizeof(buf)), (u_long) ntohl(sav->spi))); 576 error = ENOBUFS; 577 goto bad; 578 } 579 ipcomp = (struct ipcomp *)(mtod(mo, char *) + roff); 580 581 /* Initialize the IPCOMP header */ 582 /* XXX alignment always correct? */ 583 switch (sav->sah->saidx.dst.sa.sa_family) { 584 #ifdef INET 585 case AF_INET: 586 ipcomp->comp_nxt = mtod(m, struct ip *)->ip_p; 587 break; 588 #endif /* INET */ 589 #ifdef INET6 590 case AF_INET6: 591 ipcomp->comp_nxt = mtod(m, struct ip6_hdr *)->ip6_nxt; 592 break; 593 #endif 594 } 595 ipcomp->comp_flags = 0; 596 597 if ((sav->flags & SADB_X_EXT_RAWCPI) == 0) 598 cpi = sav->alg_enc; 599 else 600 cpi = ntohl(sav->spi) & 0xffff; 601 ipcomp->comp_cpi = htons(cpi); 602 603 /* Fix Next Protocol in IPv4/IPv6 header */ 604 prot = IPPROTO_IPCOMP; 605 m_copyback(m, tc->tc_protoff, sizeof(uint8_t), (u_char *)&prot); 606 607 /* Adjust the length in the IP header */ 608 switch (sav->sah->saidx.dst.sa.sa_family) { 609 #ifdef INET 610 case AF_INET: 611 mtod(m, struct ip *)->ip_len = htons(m->m_pkthdr.len); 612 break; 613 #endif /* INET */ 614 #ifdef INET6 615 case AF_INET6: 616 mtod(m, struct ip6_hdr *)->ip6_plen = 617 htons(m->m_pkthdr.len) - sizeof(struct ip6_hdr); 618 break; 619 #endif /* INET6 */ 620 default: 621 IPCOMP_STATINC(IPCOMP_STAT_NOPF); 622 DPRINTF(("ipcomp_output: unknown/unsupported protocol " 623 "family %d, IPCA %s/%08lx\n", 624 sav->sah->saidx.dst.sa.sa_family, 625 ipsec_address(&sav->sah->saidx.dst, buf, 626 sizeof(buf)), (u_long) ntohl(sav->spi))); 627 error = EPFNOSUPPORT; 628 goto bad; 629 } 630 } else { 631 /* compression was useless, we have lost time */ 632 IPCOMP_STATINC(IPCOMP_STAT_USELESS); 633 DPRINTF(("ipcomp_output_cb: compression was useless : initial size was %d" 634 "and compressed size is %d\n", rlen, crp->crp_olen)); 635 } 636 637 638 /* Release the crypto descriptor */ 639 free(tc, M_XDATA); 640 crypto_freereq(crp); 641 642 /* NB: m is reclaimed by ipsec_process_done. */ 643 error = ipsec_process_done(m, isr); 644 KEY_FREESAV(&sav); 645 mutex_exit(softnet_lock); 646 splx(s); 647 return error; 648 bad: 649 if (sav) 650 KEY_FREESAV(&sav); 651 mutex_exit(softnet_lock); 652 splx(s); 653 if (m) 654 m_freem(m); 655 free(tc, M_XDATA); 656 crypto_freereq(crp); 657 return error; 658 } 659 660 static struct xformsw ipcomp_xformsw = { 661 XF_IPCOMP, XFT_COMP, "IPcomp", 662 ipcomp_init, ipcomp_zeroize, ipcomp_input, 663 ipcomp_output, 664 NULL, 665 }; 666 667 void 668 ipcomp_attach(void) 669 { 670 ipcompstat_percpu = percpu_alloc(sizeof(uint64_t) * IPCOMP_NSTATS); 671 xform_register(&ipcomp_xformsw); 672 } 673
Indexes created Tue Sep 23 07:09:52 GMT 2025