xform_ipcomp.c revision 1.36
1 /* $NetBSD: xform_ipcomp.c,v 1.36 2017/04/18 05:26:42 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 1.36 2017/04/18 05:26:42 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 <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 const uint8_t ipcomp_stats[256] = { SADB_CALG_STATS_INIT }; 92 93 const struct comp_algo * 94 ipcomp_algorithm_lookup(int alg) 95 { 96 switch (alg) { 97 case SADB_X_CALG_DEFLATE: 98 return &comp_algo_deflate_nogrow; 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, const struct xformsw *xsp) 108 { 109 const 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(("%s: unsupported compression algorithm %d\n", 117 __func__, 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 ses = crypto_newsession(&sav->tdb_cryptoid, &cric, crypto_support); 129 return ses; 130 } 131 132 /* 133 * ipcomp_zeroize() used when IPCA is deleted 134 */ 135 static int 136 ipcomp_zeroize(struct secasvar *sav) 137 { 138 int err; 139 140 err = crypto_freesession(sav->tdb_cryptoid); 141 sav->tdb_cryptoid = 0; 142 return err; 143 } 144 145 /* 146 * ipcomp_input() gets called to uncompress an input packet 147 */ 148 static int 149 ipcomp_input(struct mbuf *m, const struct secasvar *sav, int skip, int protoff) 150 { 151 struct tdb_crypto *tc; 152 struct cryptodesc *crdc; 153 struct cryptop *crp; 154 int error, hlen = IPCOMP_HLENGTH; 155 156 IPSEC_SPLASSERT_SOFTNET(__func__); 157 158 /* Get crypto descriptors */ 159 crp = crypto_getreq(1); 160 if (crp == NULL) { 161 m_freem(m); 162 DPRINTF(("%s: no crypto descriptors\n", __func__)); 163 IPCOMP_STATINC(IPCOMP_STAT_CRYPTO); 164 return ENOBUFS; 165 } 166 /* Get IPsec-specific opaque pointer */ 167 tc = malloc(sizeof(*tc), M_XDATA, M_NOWAIT|M_ZERO); 168 if (tc == NULL) { 169 m_freem(m); 170 crypto_freereq(crp); 171 DPRINTF(("%s: cannot allocate tdb_crypto\n", __func__)); 172 IPCOMP_STATINC(IPCOMP_STAT_CRYPTO); 173 return ENOBUFS; 174 } 175 176 error = m_makewritable(&m, 0, m->m_pkthdr.len, M_NOWAIT); 177 if (error) { 178 DPRINTF(("%s: m_makewritable failed\n", __func__)); 179 m_freem(m); 180 free(tc, M_XDATA); 181 crypto_freereq(crp); 182 IPCOMP_STATINC(IPCOMP_STAT_CRYPTO); 183 return error; 184 } 185 186 crdc = crp->crp_desc; 187 188 crdc->crd_skip = skip + hlen; 189 crdc->crd_len = m->m_pkthdr.len - (skip + hlen); 190 crdc->crd_inject = 0; /* unused */ 191 192 tc->tc_ptr = 0; 193 194 /* Decompression operation */ 195 crdc->crd_alg = sav->tdb_compalgxform->type; 196 197 /* Crypto operation descriptor */ 198 crp->crp_ilen = m->m_pkthdr.len - (skip + hlen); 199 crp->crp_olen = MCLBYTES; /* hint to decompression code */ 200 crp->crp_flags = CRYPTO_F_IMBUF; 201 crp->crp_buf = m; 202 crp->crp_callback = ipcomp_input_cb; 203 crp->crp_sid = sav->tdb_cryptoid; 204 crp->crp_opaque = tc; 205 206 /* These are passed as-is to the callback */ 207 tc->tc_spi = sav->spi; 208 tc->tc_dst = sav->sah->saidx.dst; 209 tc->tc_proto = sav->sah->saidx.proto; 210 tc->tc_protoff = protoff; 211 tc->tc_skip = skip; 212 213 return crypto_dispatch(crp); 214 } 215 216 #ifdef INET6 217 #define IPSEC_COMMON_INPUT_CB(m, sav, skip, protoff, mtag) do { \ 218 if (saidx->dst.sa.sa_family == AF_INET6) { \ 219 error = ipsec6_common_input_cb(m, sav, skip, protoff, mtag); \ 220 } else { \ 221 error = ipsec4_common_input_cb(m, sav, skip, protoff, mtag); \ 222 } \ 223 } while (0) 224 #else 225 #define IPSEC_COMMON_INPUT_CB(m, sav, skip, protoff, mtag) \ 226 (error = ipsec4_common_input_cb(m, sav, skip, protoff, mtag)) 227 #endif 228 229 /* 230 * IPComp input callback from the crypto driver. 231 */ 232 static int 233 ipcomp_input_cb(struct cryptop *crp) 234 { 235 struct tdb_crypto *tc; 236 int skip, protoff; 237 struct mbuf *m; 238 struct secasvar *sav; 239 struct secasindex *saidx __diagused; 240 int s, hlen = IPCOMP_HLENGTH, error, clen; 241 uint8_t nproto; 242 void *addr; 243 uint16_t dport; 244 uint16_t sport; 245 246 KASSERT(crp->crp_opaque != NULL); 247 tc = crp->crp_opaque; 248 skip = tc->tc_skip; 249 protoff = tc->tc_protoff; 250 m = crp->crp_buf; 251 252 /* find the source port for NAT-T */ 253 nat_t_ports_get(m, &dport, &sport); 254 255 s = splsoftnet(); 256 mutex_enter(softnet_lock); 257 258 sav = KEY_ALLOCSA(&tc->tc_dst, tc->tc_proto, tc->tc_spi, sport, dport); 259 if (sav == NULL) { 260 IPCOMP_STATINC(IPCOMP_STAT_NOTDB); 261 DPRINTF(("%s: SA expired while in crypto\n", __func__)); 262 error = ENOBUFS; /*XXX*/ 263 goto bad; 264 } 265 266 saidx = &sav->sah->saidx; 267 KASSERTMSG(saidx->dst.sa.sa_family == AF_INET || 268 saidx->dst.sa.sa_family == AF_INET6, 269 "unexpected protocol family %u", saidx->dst.sa.sa_family); 270 271 /* Check for crypto errors */ 272 if (crp->crp_etype) { 273 /* Reset the session ID */ 274 if (sav->tdb_cryptoid != 0) 275 sav->tdb_cryptoid = crp->crp_sid; 276 277 if (crp->crp_etype == EAGAIN) { 278 KEY_FREESAV(&sav); 279 mutex_exit(softnet_lock); 280 splx(s); 281 return crypto_dispatch(crp); 282 } 283 284 IPCOMP_STATINC(IPCOMP_STAT_NOXFORM); 285 DPRINTF(("%s: crypto error %d\n", __func__, crp->crp_etype)); 286 error = crp->crp_etype; 287 goto bad; 288 } 289 /* Shouldn't happen... */ 290 if (m == NULL) { 291 IPCOMP_STATINC(IPCOMP_STAT_CRYPTO); 292 DPRINTF(("%s: null mbuf returned from crypto\n", __func__)); 293 error = EINVAL; 294 goto bad; 295 } 296 IPCOMP_STATINC(IPCOMP_STAT_HIST + ipcomp_stats[sav->alg_comp]); 297 298 /* Update the counters */ 299 IPCOMP_STATADD(IPCOMP_STAT_IBYTES, m->m_pkthdr.len - skip - hlen); 300 301 302 clen = crp->crp_olen; /* Length of data after processing */ 303 304 /* Release the crypto descriptors */ 305 free(tc, M_XDATA), tc = NULL; 306 crypto_freereq(crp), crp = NULL; 307 308 /* In case it's not done already, adjust the size of the mbuf chain */ 309 m->m_pkthdr.len = clen + hlen + skip; 310 311 if (m->m_len < skip + hlen && (m = m_pullup(m, skip + hlen)) == 0) { 312 IPCOMP_STATINC(IPCOMP_STAT_HDROPS); /*XXX*/ 313 DPRINTF(("%s: m_pullup failed\n", __func__)); 314 error = EINVAL; /*XXX*/ 315 goto bad; 316 } 317 318 /* Keep the next protocol field */ 319 addr = (uint8_t*) mtod(m, struct ip *) + skip; 320 nproto = ((struct ipcomp *) addr)->comp_nxt; 321 switch (nproto) { 322 case IPPROTO_IPCOMP: 323 case IPPROTO_AH: 324 case IPPROTO_ESP: 325 IPCOMP_STATINC(IPCOMP_STAT_HDROPS); 326 DPRINTF(("%s: nested ipcomp, IPCA %s/%08lx\n", __func__, 327 ipsec_address(&sav->sah->saidx.dst), 328 (u_long) ntohl(sav->spi))); 329 error = EINVAL; 330 goto bad; 331 default: 332 break; 333 } 334 335 /* Remove the IPCOMP header */ 336 error = m_striphdr(m, skip, hlen); 337 if (error) { 338 IPCOMP_STATINC(IPCOMP_STAT_HDROPS); 339 DPRINTF(("%s: bad mbuf chain, IPCA %s/%08lx\n", __func__, 340 ipsec_address(&sav->sah->saidx.dst), 341 (u_long) ntohl(sav->spi))); 342 goto bad; 343 } 344 345 /* Restore the Next Protocol field */ 346 m_copyback(m, protoff, sizeof(uint8_t), (uint8_t *) &nproto); 347 348 IPSEC_COMMON_INPUT_CB(m, sav, skip, protoff, NULL); 349 350 KEY_FREESAV(&sav); 351 mutex_exit(softnet_lock); 352 splx(s); 353 return error; 354 bad: 355 if (sav) 356 KEY_FREESAV(&sav); 357 mutex_exit(softnet_lock); 358 splx(s); 359 if (m) 360 m_freem(m); 361 if (tc != NULL) 362 free(tc, M_XDATA); 363 if (crp) 364 crypto_freereq(crp); 365 return error; 366 } 367 368 /* 369 * IPComp output routine, called by ipsec[46]_process_packet() 370 */ 371 static int 372 ipcomp_output( 373 struct mbuf *m, 374 struct ipsecrequest *isr, 375 struct mbuf **mp, 376 int skip, 377 int protoff 378 ) 379 { 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), 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), 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__, ipsec_address(&sav->sah->saidx.dst), 446 (u_long) ntohl(sav->spi))); 447 error = ENOBUFS; 448 goto bad; 449 } 450 451 /* Ok now, we can pass to the crypto processing */ 452 453 /* Get crypto descriptors */ 454 crp = crypto_getreq(1); 455 if (crp == NULL) { 456 IPCOMP_STATINC(IPCOMP_STAT_CRYPTO); 457 DPRINTF(("%s: failed to acquire crypto descriptor\n", 458 __func__)); 459 error = ENOBUFS; 460 goto bad; 461 } 462 crdc = crp->crp_desc; 463 464 /* Compression descriptor */ 465 crdc->crd_skip = skip; 466 crdc->crd_len = m->m_pkthdr.len - skip; 467 crdc->crd_flags = CRD_F_COMP; 468 crdc->crd_inject = skip; 469 470 /* Compression operation */ 471 crdc->crd_alg = ipcompx->type; 472 473 /* IPsec-specific opaque crypto info */ 474 tc = malloc(sizeof(*tc), M_XDATA, M_NOWAIT|M_ZERO); 475 if (tc == NULL) { 476 IPCOMP_STATINC(IPCOMP_STAT_CRYPTO); 477 DPRINTF(("%s: failed to allocate tdb_crypto\n", __func__)); 478 crypto_freereq(crp); 479 error = ENOBUFS; 480 goto bad; 481 } 482 483 tc->tc_isr = isr; 484 tc->tc_spi = sav->spi; 485 tc->tc_dst = sav->sah->saidx.dst; 486 tc->tc_proto = sav->sah->saidx.proto; 487 tc->tc_skip = skip; 488 tc->tc_protoff = protoff; 489 490 /* Crypto operation descriptor */ 491 crp->crp_ilen = m->m_pkthdr.len; /* Total input length */ 492 crp->crp_flags = CRYPTO_F_IMBUF; 493 crp->crp_buf = m; 494 crp->crp_callback = ipcomp_output_cb; 495 crp->crp_opaque = tc; 496 crp->crp_sid = sav->tdb_cryptoid; 497 498 return crypto_dispatch(crp); 499 bad: 500 if (m) 501 m_freem(m); 502 return (error); 503 } 504 505 /* 506 * IPComp output callback from the crypto driver. 507 */ 508 static int 509 ipcomp_output_cb(struct cryptop *crp) 510 { 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_ALLOCSA(&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), 573 (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), 624 (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_IPCOMP, XFT_COMP, "IPcomp", 660 ipcomp_init, ipcomp_zeroize, ipcomp_input, 661 ipcomp_output, 662 NULL, 663 }; 664 665 INITFN void 666 ipcomp_attach(void) 667 { 668 ipcompstat_percpu = percpu_alloc(sizeof(uint64_t) * IPCOMP_NSTATS); 669 xform_register(&ipcomp_xformsw); 670 } 671
Indexes created Mon Sep 22 21:09:42 GMT 2025