xform_ipcomp.c revision 1.41
1 /* $NetBSD: xform_ipcomp.c,v 1.41 2017/07/07 01:37:34 ozaki-r 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 1.41 2017/07/07 01:37:34 ozaki-r 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 /* Decompression operation */ 191 crdc->crd_alg = sav->tdb_compalgxform->type; 192 193 /* Crypto operation descriptor */ 194 crp->crp_ilen = m->m_pkthdr.len - (skip + hlen); 195 crp->crp_olen = MCLBYTES; /* hint to decompression code */ 196 crp->crp_flags = CRYPTO_F_IMBUF; 197 crp->crp_buf = m; 198 crp->crp_callback = ipcomp_input_cb; 199 crp->crp_sid = sav->tdb_cryptoid; 200 crp->crp_opaque = tc; 201 202 /* These are passed as-is to the callback */ 203 tc->tc_spi = sav->spi; 204 tc->tc_dst = sav->sah->saidx.dst; 205 tc->tc_proto = sav->sah->saidx.proto; 206 tc->tc_protoff = protoff; 207 tc->tc_skip = skip; 208 209 return crypto_dispatch(crp); 210 } 211 212 #ifdef INET6 213 #define IPSEC_COMMON_INPUT_CB(m, sav, skip, protoff) do { \ 214 if (saidx->dst.sa.sa_family == AF_INET6) { \ 215 error = ipsec6_common_input_cb(m, sav, skip, protoff); \ 216 } else { \ 217 error = ipsec4_common_input_cb(m, sav, skip, protoff); \ 218 } \ 219 } while (0) 220 #else 221 #define IPSEC_COMMON_INPUT_CB(m, sav, skip, protoff) \ 222 (error = ipsec4_common_input_cb(m, sav, skip, protoff)) 223 #endif 224 225 /* 226 * IPComp input callback from the crypto driver. 227 */ 228 static int 229 ipcomp_input_cb(struct cryptop *crp) 230 { 231 char buf[IPSEC_ADDRSTRLEN]; 232 struct tdb_crypto *tc; 233 int skip, protoff; 234 struct mbuf *m; 235 struct secasvar *sav; 236 struct secasindex *saidx __diagused; 237 int s, hlen = IPCOMP_HLENGTH, error, clen; 238 uint8_t nproto; 239 void *addr; 240 uint16_t dport; 241 uint16_t sport; 242 243 KASSERT(crp->crp_opaque != NULL); 244 tc = crp->crp_opaque; 245 skip = tc->tc_skip; 246 protoff = tc->tc_protoff; 247 m = crp->crp_buf; 248 249 /* find the source port for NAT-T */ 250 nat_t_ports_get(m, &dport, &sport); 251 252 s = splsoftnet(); 253 mutex_enter(softnet_lock); 254 255 sav = KEY_LOOKUP_SA(&tc->tc_dst, tc->tc_proto, tc->tc_spi, sport, dport); 256 if (sav == NULL) { 257 IPCOMP_STATINC(IPCOMP_STAT_NOTDB); 258 DPRINTF(("%s: SA expired while in crypto\n", __func__)); 259 error = ENOBUFS; /*XXX*/ 260 goto bad; 261 } 262 263 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 if (crp->crp_etype == EAGAIN) { 275 KEY_FREESAV(&sav); 276 mutex_exit(softnet_lock); 277 splx(s); 278 return crypto_dispatch(crp); 279 } 280 281 IPCOMP_STATINC(IPCOMP_STAT_NOXFORM); 282 DPRINTF(("%s: crypto error %d\n", __func__, crp->crp_etype)); 283 error = crp->crp_etype; 284 goto bad; 285 } 286 /* Shouldn't happen... */ 287 if (m == NULL) { 288 IPCOMP_STATINC(IPCOMP_STAT_CRYPTO); 289 DPRINTF(("%s: null mbuf returned from crypto\n", __func__)); 290 error = EINVAL; 291 goto bad; 292 } 293 IPCOMP_STATINC(IPCOMP_STAT_HIST + ipcomp_stats[sav->alg_comp]); 294 295 /* Update the counters */ 296 IPCOMP_STATADD(IPCOMP_STAT_IBYTES, m->m_pkthdr.len - skip - hlen); 297 298 299 clen = crp->crp_olen; /* Length of data after processing */ 300 301 /* Release the crypto descriptors */ 302 free(tc, M_XDATA), tc = NULL; 303 crypto_freereq(crp), crp = NULL; 304 305 /* In case it's not done already, adjust the size of the mbuf chain */ 306 m->m_pkthdr.len = clen + hlen + skip; 307 308 if (m->m_len < skip + hlen && (m = m_pullup(m, skip + hlen)) == 0) { 309 IPCOMP_STATINC(IPCOMP_STAT_HDROPS); /*XXX*/ 310 DPRINTF(("%s: m_pullup failed\n", __func__)); 311 error = EINVAL; /*XXX*/ 312 goto bad; 313 } 314 315 /* Keep the next protocol field */ 316 addr = (uint8_t*) mtod(m, struct ip *) + skip; 317 nproto = ((struct ipcomp *) addr)->comp_nxt; 318 switch (nproto) { 319 case IPPROTO_IPCOMP: 320 case IPPROTO_AH: 321 case IPPROTO_ESP: 322 IPCOMP_STATINC(IPCOMP_STAT_HDROPS); 323 DPRINTF(("%s: nested ipcomp, IPCA %s/%08lx\n", __func__, 324 ipsec_address(&sav->sah->saidx.dst, buf, sizeof(buf)), 325 (u_long) ntohl(sav->spi))); 326 error = EINVAL; 327 goto bad; 328 default: 329 break; 330 } 331 332 /* Remove the IPCOMP header */ 333 error = m_striphdr(m, skip, hlen); 334 if (error) { 335 IPCOMP_STATINC(IPCOMP_STAT_HDROPS); 336 DPRINTF(("%s: bad mbuf chain, IPCA %s/%08lx\n", __func__, 337 ipsec_address(&sav->sah->saidx.dst, buf, sizeof(buf)), 338 (u_long) ntohl(sav->spi))); 339 goto bad; 340 } 341 342 /* Restore the Next Protocol field */ 343 m_copyback(m, protoff, sizeof(uint8_t), (uint8_t *) &nproto); 344 345 IPSEC_COMMON_INPUT_CB(m, sav, skip, protoff); 346 347 KEY_FREESAV(&sav); 348 mutex_exit(softnet_lock); 349 splx(s); 350 return error; 351 bad: 352 if (sav) 353 KEY_FREESAV(&sav); 354 mutex_exit(softnet_lock); 355 splx(s); 356 if (m) 357 m_freem(m); 358 if (tc != NULL) 359 free(tc, M_XDATA); 360 if (crp) 361 crypto_freereq(crp); 362 return error; 363 } 364 365 /* 366 * IPComp output routine, called by ipsec[46]_process_packet() 367 */ 368 static int 369 ipcomp_output( 370 struct mbuf *m, 371 struct ipsecrequest *isr, 372 struct mbuf **mp, 373 int skip, 374 int protoff 375 ) 376 { 377 char buf[IPSEC_ADDRSTRLEN]; 378 const struct secasvar *sav; 379 const struct comp_algo *ipcompx; 380 int error, ralen, hlen, maxpacketsize; 381 struct cryptodesc *crdc; 382 struct cryptop *crp; 383 struct tdb_crypto *tc; 384 385 IPSEC_SPLASSERT_SOFTNET(__func__); 386 KASSERT(isr->sav != NULL); 387 sav = isr->sav; 388 KASSERT(sav->tdb_compalgxform != NULL); 389 ipcompx = sav->tdb_compalgxform; 390 391 ralen = m->m_pkthdr.len - skip; /* Raw payload length before comp. */ 392 393 /* Don't process the packet if it is too short */ 394 if (ralen < ipcompx->minlen) { 395 IPCOMP_STATINC(IPCOMP_STAT_MINLEN); 396 return ipsec_process_done(m,isr); 397 } 398 399 hlen = IPCOMP_HLENGTH; 400 401 IPCOMP_STATINC(IPCOMP_STAT_OUTPUT); 402 403 /* Check for maximum packet size violations. */ 404 switch (sav->sah->saidx.dst.sa.sa_family) { 405 #ifdef INET 406 case AF_INET: 407 maxpacketsize = IP_MAXPACKET; 408 break; 409 #endif /* INET */ 410 #ifdef INET6 411 case AF_INET6: 412 maxpacketsize = IPV6_MAXPACKET; 413 break; 414 #endif /* INET6 */ 415 default: 416 IPCOMP_STATINC(IPCOMP_STAT_NOPF); 417 DPRINTF(("%s: unknown/unsupported protocol family %d" 418 ", IPCA %s/%08lx\n", __func__, 419 sav->sah->saidx.dst.sa.sa_family, 420 ipsec_address(&sav->sah->saidx.dst, buf, sizeof(buf)), 421 (u_long) ntohl(sav->spi))); 422 error = EPFNOSUPPORT; 423 goto bad; 424 } 425 if (skip + hlen + ralen > maxpacketsize) { 426 IPCOMP_STATINC(IPCOMP_STAT_TOOBIG); 427 DPRINTF(("%s: packet in IPCA %s/%08lx got too big " 428 "(len %u, max len %u)\n", __func__, 429 ipsec_address(&sav->sah->saidx.dst, buf, sizeof(buf)), 430 (u_long) ntohl(sav->spi), 431 skip + hlen + ralen, maxpacketsize)); 432 error = EMSGSIZE; 433 goto bad; 434 } 435 436 /* Update the counters */ 437 IPCOMP_STATADD(IPCOMP_STAT_OBYTES, m->m_pkthdr.len - skip); 438 439 m = m_clone(m); 440 if (m == NULL) { 441 IPCOMP_STATINC(IPCOMP_STAT_HDROPS); 442 DPRINTF(("%s: cannot clone mbuf chain, IPCA %s/%08lx\n", 443 __func__, 444 ipsec_address(&sav->sah->saidx.dst, buf, sizeof(buf)), 445 (u_long) ntohl(sav->spi))); 446 error = ENOBUFS; 447 goto bad; 448 } 449 450 /* Ok now, we can pass to the crypto processing */ 451 452 /* Get crypto descriptors */ 453 crp = crypto_getreq(1); 454 if (crp == NULL) { 455 IPCOMP_STATINC(IPCOMP_STAT_CRYPTO); 456 DPRINTF(("%s: failed to acquire crypto descriptor\n", 457 __func__)); 458 error = ENOBUFS; 459 goto bad; 460 } 461 crdc = crp->crp_desc; 462 463 /* Compression descriptor */ 464 crdc->crd_skip = skip; 465 crdc->crd_len = m->m_pkthdr.len - skip; 466 crdc->crd_flags = CRD_F_COMP; 467 crdc->crd_inject = skip; 468 469 /* Compression operation */ 470 crdc->crd_alg = ipcompx->type; 471 472 /* IPsec-specific opaque crypto info */ 473 tc = malloc(sizeof(*tc), M_XDATA, M_NOWAIT|M_ZERO); 474 if (tc == NULL) { 475 IPCOMP_STATINC(IPCOMP_STAT_CRYPTO); 476 DPRINTF(("%s: failed to allocate tdb_crypto\n", __func__)); 477 crypto_freereq(crp); 478 error = ENOBUFS; 479 goto bad; 480 } 481 482 tc->tc_isr = isr; 483 tc->tc_spi = sav->spi; 484 tc->tc_dst = sav->sah->saidx.dst; 485 tc->tc_proto = sav->sah->saidx.proto; 486 tc->tc_skip = skip; 487 tc->tc_protoff = protoff; 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 return crypto_dispatch(crp); 498 bad: 499 if (m) 500 m_freem(m); 501 return (error); 502 } 503 504 /* 505 * IPComp output callback from the crypto driver. 506 */ 507 static int 508 ipcomp_output_cb(struct cryptop *crp) 509 { 510 char buf[IPSEC_ADDRSTRLEN]; 511 struct tdb_crypto *tc; 512 struct ipsecrequest *isr; 513 struct secasvar *sav; 514 struct mbuf *m, *mo; 515 int s, error, skip, rlen, roff; 516 uint8_t prot; 517 uint16_t cpi; 518 struct ipcomp * ipcomp; 519 520 KASSERT(crp->crp_opaque != NULL); 521 tc = crp->crp_opaque; 522 m = crp->crp_buf; 523 skip = tc->tc_skip; 524 rlen = crp->crp_ilen - skip; 525 526 s = splsoftnet(); 527 mutex_enter(softnet_lock); 528 529 isr = tc->tc_isr; 530 sav = KEY_LOOKUP_SA(&tc->tc_dst, tc->tc_proto, tc->tc_spi, 0, 0); 531 if (sav == NULL) { 532 IPCOMP_STATINC(IPCOMP_STAT_NOTDB); 533 DPRINTF(("%s: SA expired while in crypto\n", __func__)); 534 error = ENOBUFS; /*XXX*/ 535 goto bad; 536 } 537 KASSERTMSG(isr->sav == sav, "SA changed"); 538 539 /* Check for crypto errors */ 540 if (crp->crp_etype) { 541 /* Reset session ID */ 542 if (sav->tdb_cryptoid != 0) 543 sav->tdb_cryptoid = crp->crp_sid; 544 545 if (crp->crp_etype == EAGAIN) { 546 KEY_FREESAV(&sav); 547 mutex_exit(softnet_lock); 548 splx(s); 549 return crypto_dispatch(crp); 550 } 551 IPCOMP_STATINC(IPCOMP_STAT_NOXFORM); 552 DPRINTF(("%s: crypto error %d\n", __func__, crp->crp_etype)); 553 error = crp->crp_etype; 554 goto bad; 555 } 556 /* Shouldn't happen... */ 557 if (m == NULL) { 558 IPCOMP_STATINC(IPCOMP_STAT_CRYPTO); 559 DPRINTF(("%s: bogus return buffer from crypto\n", __func__)); 560 error = EINVAL; 561 goto bad; 562 } 563 IPCOMP_STATINC(IPCOMP_STAT_HIST + ipcomp_stats[sav->alg_comp]); 564 565 if (rlen > crp->crp_olen) { 566 /* Inject IPCOMP header */ 567 mo = m_makespace(m, skip, IPCOMP_HLENGTH, &roff); 568 if (mo == NULL) { 569 IPCOMP_STATINC(IPCOMP_STAT_WRAP); 570 DPRINTF(("%s: failed to inject IPCOMP header for " 571 "IPCA %s/%08lx\n", __func__, 572 ipsec_address(&sav->sah->saidx.dst, buf, 573 sizeof(buf)), (u_long) ntohl(sav->spi))); 574 error = ENOBUFS; 575 goto bad; 576 } 577 ipcomp = (struct ipcomp *)(mtod(mo, char *) + roff); 578 579 /* Initialize the IPCOMP header */ 580 /* XXX alignment always correct? */ 581 switch (sav->sah->saidx.dst.sa.sa_family) { 582 #ifdef INET 583 case AF_INET: 584 ipcomp->comp_nxt = mtod(m, struct ip *)->ip_p; 585 break; 586 #endif /* INET */ 587 #ifdef INET6 588 case AF_INET6: 589 ipcomp->comp_nxt = mtod(m, struct ip6_hdr *)->ip6_nxt; 590 break; 591 #endif 592 } 593 ipcomp->comp_flags = 0; 594 595 if ((sav->flags & SADB_X_EXT_RAWCPI) == 0) 596 cpi = sav->alg_enc; 597 else 598 cpi = ntohl(sav->spi) & 0xffff; 599 ipcomp->comp_cpi = htons(cpi); 600 601 /* Fix Next Protocol in IPv4/IPv6 header */ 602 prot = IPPROTO_IPCOMP; 603 m_copyback(m, tc->tc_protoff, sizeof(uint8_t), (u_char *)&prot); 604 605 /* Adjust the length in the IP header */ 606 switch (sav->sah->saidx.dst.sa.sa_family) { 607 #ifdef INET 608 case AF_INET: 609 mtod(m, struct ip *)->ip_len = htons(m->m_pkthdr.len); 610 break; 611 #endif /* INET */ 612 #ifdef INET6 613 case AF_INET6: 614 mtod(m, struct ip6_hdr *)->ip6_plen = 615 htons(m->m_pkthdr.len) - sizeof(struct ip6_hdr); 616 break; 617 #endif /* INET6 */ 618 default: 619 IPCOMP_STATINC(IPCOMP_STAT_NOPF); 620 DPRINTF(("ipcomp_output: unknown/unsupported protocol " 621 "family %d, IPCA %s/%08lx\n", 622 sav->sah->saidx.dst.sa.sa_family, 623 ipsec_address(&sav->sah->saidx.dst, buf, 624 sizeof(buf)), (u_long) ntohl(sav->spi))); 625 error = EPFNOSUPPORT; 626 goto bad; 627 } 628 } else { 629 /* compression was useless, we have lost time */ 630 IPCOMP_STATINC(IPCOMP_STAT_USELESS); 631 DPRINTF(("ipcomp_output_cb: compression was useless : initial size was %d" 632 "and compressed size is %d\n", rlen, crp->crp_olen)); 633 } 634 635 636 /* Release the crypto descriptor */ 637 free(tc, M_XDATA); 638 crypto_freereq(crp); 639 640 /* NB: m is reclaimed by ipsec_process_done. */ 641 error = ipsec_process_done(m, isr); 642 KEY_FREESAV(&sav); 643 mutex_exit(softnet_lock); 644 splx(s); 645 return error; 646 bad: 647 if (sav) 648 KEY_FREESAV(&sav); 649 mutex_exit(softnet_lock); 650 splx(s); 651 if (m) 652 m_freem(m); 653 free(tc, M_XDATA); 654 crypto_freereq(crp); 655 return error; 656 } 657 658 static struct xformsw ipcomp_xformsw = { 659 .xf_type = XF_IPCOMP, 660 .xf_flags = XFT_COMP, 661 .xf_name = "IPcomp", 662 .xf_init = ipcomp_init, 663 .xf_zeroize = ipcomp_zeroize, 664 .xf_input = ipcomp_input, 665 .xf_output = ipcomp_output, 666 .xf_next = NULL, 667 }; 668 669 void 670 ipcomp_attach(void) 671 { 672 ipcompstat_percpu = percpu_alloc(sizeof(uint64_t) * IPCOMP_NSTATS); 673 xform_register(&ipcomp_xformsw); 674 } 675
Indexes created Tue Sep 30 20:09:53 GMT 2025