xform_ipcomp.c revision 1.37
1 /* $NetBSD: xform_ipcomp.c,v 1.37 2017/04/19 03:39:14 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 1.37 2017/04/19 03:39:14 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 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 struct tdb_crypto *tc; 234 int skip, protoff; 235 struct mbuf *m; 236 struct secasvar *sav; 237 struct secasindex *saidx __diagused; 238 int s, hlen = IPCOMP_HLENGTH, error, clen; 239 uint8_t nproto; 240 void *addr; 241 uint16_t dport; 242 uint16_t sport; 243 244 KASSERT(crp->crp_opaque != NULL); 245 tc = crp->crp_opaque; 246 skip = tc->tc_skip; 247 protoff = tc->tc_protoff; 248 m = crp->crp_buf; 249 250 /* find the source port for NAT-T */ 251 nat_t_ports_get(m, &dport, &sport); 252 253 s = splsoftnet(); 254 mutex_enter(softnet_lock); 255 256 sav = KEY_ALLOCSA(&tc->tc_dst, tc->tc_proto, tc->tc_spi, sport, dport); 257 if (sav == NULL) { 258 IPCOMP_STATINC(IPCOMP_STAT_NOTDB); 259 DPRINTF(("%s: SA expired while in crypto\n", __func__)); 260 error = ENOBUFS; /*XXX*/ 261 goto bad; 262 } 263 264 saidx = &sav->sah->saidx; 265 KASSERTMSG(saidx->dst.sa.sa_family == AF_INET || 266 saidx->dst.sa.sa_family == AF_INET6, 267 "unexpected protocol family %u", saidx->dst.sa.sa_family); 268 269 /* Check for crypto errors */ 270 if (crp->crp_etype) { 271 /* Reset the session ID */ 272 if (sav->tdb_cryptoid != 0) 273 sav->tdb_cryptoid = crp->crp_sid; 274 275 if (crp->crp_etype == EAGAIN) { 276 KEY_FREESAV(&sav); 277 mutex_exit(softnet_lock); 278 splx(s); 279 return crypto_dispatch(crp); 280 } 281 282 IPCOMP_STATINC(IPCOMP_STAT_NOXFORM); 283 DPRINTF(("%s: crypto error %d\n", __func__, crp->crp_etype)); 284 error = crp->crp_etype; 285 goto bad; 286 } 287 /* Shouldn't happen... */ 288 if (m == NULL) { 289 IPCOMP_STATINC(IPCOMP_STAT_CRYPTO); 290 DPRINTF(("%s: null mbuf returned from crypto\n", __func__)); 291 error = EINVAL; 292 goto bad; 293 } 294 IPCOMP_STATINC(IPCOMP_STAT_HIST + ipcomp_stats[sav->alg_comp]); 295 296 /* Update the counters */ 297 IPCOMP_STATADD(IPCOMP_STAT_IBYTES, m->m_pkthdr.len - skip - hlen); 298 299 300 clen = crp->crp_olen; /* Length of data after processing */ 301 302 /* Release the crypto descriptors */ 303 free(tc, M_XDATA), tc = NULL; 304 crypto_freereq(crp), crp = NULL; 305 306 /* In case it's not done already, adjust the size of the mbuf chain */ 307 m->m_pkthdr.len = clen + hlen + skip; 308 309 if (m->m_len < skip + hlen && (m = m_pullup(m, skip + hlen)) == 0) { 310 IPCOMP_STATINC(IPCOMP_STAT_HDROPS); /*XXX*/ 311 DPRINTF(("%s: m_pullup failed\n", __func__)); 312 error = EINVAL; /*XXX*/ 313 goto bad; 314 } 315 316 /* Keep the next protocol field */ 317 addr = (uint8_t*) mtod(m, struct ip *) + skip; 318 nproto = ((struct ipcomp *) addr)->comp_nxt; 319 switch (nproto) { 320 case IPPROTO_IPCOMP: 321 case IPPROTO_AH: 322 case IPPROTO_ESP: 323 IPCOMP_STATINC(IPCOMP_STAT_HDROPS); 324 DPRINTF(("%s: nested ipcomp, IPCA %s/%08lx\n", __func__, 325 ipsec_address(&sav->sah->saidx.dst), 326 (u_long) ntohl(sav->spi))); 327 error = EINVAL; 328 goto bad; 329 default: 330 break; 331 } 332 333 /* Remove the IPCOMP header */ 334 error = m_striphdr(m, skip, hlen); 335 if (error) { 336 IPCOMP_STATINC(IPCOMP_STAT_HDROPS); 337 DPRINTF(("%s: bad mbuf chain, IPCA %s/%08lx\n", __func__, 338 ipsec_address(&sav->sah->saidx.dst), 339 (u_long) ntohl(sav->spi))); 340 goto bad; 341 } 342 343 /* Restore the Next Protocol field */ 344 m_copyback(m, protoff, sizeof(uint8_t), (uint8_t *) &nproto); 345 346 IPSEC_COMMON_INPUT_CB(m, sav, skip, protoff, NULL); 347 348 KEY_FREESAV(&sav); 349 mutex_exit(softnet_lock); 350 splx(s); 351 return error; 352 bad: 353 if (sav) 354 KEY_FREESAV(&sav); 355 mutex_exit(softnet_lock); 356 splx(s); 357 if (m) 358 m_freem(m); 359 if (tc != NULL) 360 free(tc, M_XDATA); 361 if (crp) 362 crypto_freereq(crp); 363 return error; 364 } 365 366 /* 367 * IPComp output routine, called by ipsec[46]_process_packet() 368 */ 369 static int 370 ipcomp_output( 371 struct mbuf *m, 372 struct ipsecrequest *isr, 373 struct mbuf **mp, 374 int skip, 375 int protoff 376 ) 377 { 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), 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), 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__, ipsec_address(&sav->sah->saidx.dst), 444 (u_long) ntohl(sav->spi))); 445 error = ENOBUFS; 446 goto bad; 447 } 448 449 /* Ok now, we can pass to the crypto processing */ 450 451 /* Get crypto descriptors */ 452 crp = crypto_getreq(1); 453 if (crp == NULL) { 454 IPCOMP_STATINC(IPCOMP_STAT_CRYPTO); 455 DPRINTF(("%s: failed to acquire crypto descriptor\n", 456 __func__)); 457 error = ENOBUFS; 458 goto bad; 459 } 460 crdc = crp->crp_desc; 461 462 /* Compression descriptor */ 463 crdc->crd_skip = skip; 464 crdc->crd_len = m->m_pkthdr.len - skip; 465 crdc->crd_flags = CRD_F_COMP; 466 crdc->crd_inject = skip; 467 468 /* Compression operation */ 469 crdc->crd_alg = ipcompx->type; 470 471 /* IPsec-specific opaque crypto info */ 472 tc = malloc(sizeof(*tc), M_XDATA, M_NOWAIT|M_ZERO); 473 if (tc == NULL) { 474 IPCOMP_STATINC(IPCOMP_STAT_CRYPTO); 475 DPRINTF(("%s: failed to allocate tdb_crypto\n", __func__)); 476 crypto_freereq(crp); 477 error = ENOBUFS; 478 goto bad; 479 } 480 481 tc->tc_isr = isr; 482 tc->tc_spi = sav->spi; 483 tc->tc_dst = sav->sah->saidx.dst; 484 tc->tc_proto = sav->sah->saidx.proto; 485 tc->tc_skip = skip; 486 tc->tc_protoff = protoff; 487 488 /* Crypto operation descriptor */ 489 crp->crp_ilen = m->m_pkthdr.len; /* Total input length */ 490 crp->crp_flags = CRYPTO_F_IMBUF; 491 crp->crp_buf = m; 492 crp->crp_callback = ipcomp_output_cb; 493 crp->crp_opaque = tc; 494 crp->crp_sid = sav->tdb_cryptoid; 495 496 return crypto_dispatch(crp); 497 bad: 498 if (m) 499 m_freem(m); 500 return (error); 501 } 502 503 /* 504 * IPComp output callback from the crypto driver. 505 */ 506 static int 507 ipcomp_output_cb(struct cryptop *crp) 508 { 509 struct tdb_crypto *tc; 510 struct ipsecrequest *isr; 511 struct secasvar *sav; 512 struct mbuf *m, *mo; 513 int s, error, skip, rlen, roff; 514 uint8_t prot; 515 uint16_t cpi; 516 struct ipcomp * ipcomp; 517 518 KASSERT(crp->crp_opaque != NULL); 519 tc = crp->crp_opaque; 520 m = crp->crp_buf; 521 skip = tc->tc_skip; 522 rlen = crp->crp_ilen - skip; 523 524 s = splsoftnet(); 525 mutex_enter(softnet_lock); 526 527 isr = tc->tc_isr; 528 sav = KEY_ALLOCSA(&tc->tc_dst, tc->tc_proto, tc->tc_spi, 0, 0); 529 if (sav == NULL) { 530 IPCOMP_STATINC(IPCOMP_STAT_NOTDB); 531 DPRINTF(("%s: SA expired while in crypto\n", __func__)); 532 error = ENOBUFS; /*XXX*/ 533 goto bad; 534 } 535 KASSERTMSG(isr->sav == sav, "SA changed"); 536 537 /* Check for crypto errors */ 538 if (crp->crp_etype) { 539 /* Reset session ID */ 540 if (sav->tdb_cryptoid != 0) 541 sav->tdb_cryptoid = crp->crp_sid; 542 543 if (crp->crp_etype == EAGAIN) { 544 KEY_FREESAV(&sav); 545 mutex_exit(softnet_lock); 546 splx(s); 547 return crypto_dispatch(crp); 548 } 549 IPCOMP_STATINC(IPCOMP_STAT_NOXFORM); 550 DPRINTF(("%s: crypto error %d\n", __func__, crp->crp_etype)); 551 error = crp->crp_etype; 552 goto bad; 553 } 554 /* Shouldn't happen... */ 555 if (m == NULL) { 556 IPCOMP_STATINC(IPCOMP_STAT_CRYPTO); 557 DPRINTF(("%s: bogus return buffer from crypto\n", __func__)); 558 error = EINVAL; 559 goto bad; 560 } 561 IPCOMP_STATINC(IPCOMP_STAT_HIST + ipcomp_stats[sav->alg_comp]); 562 563 if (rlen > crp->crp_olen) { 564 /* Inject IPCOMP header */ 565 mo = m_makespace(m, skip, IPCOMP_HLENGTH, &roff); 566 if (mo == NULL) { 567 IPCOMP_STATINC(IPCOMP_STAT_WRAP); 568 DPRINTF(("%s: failed to inject IPCOMP header for " 569 "IPCA %s/%08lx\n", __func__, 570 ipsec_address(&sav->sah->saidx.dst), 571 (u_long) ntohl(sav->spi))); 572 error = ENOBUFS; 573 goto bad; 574 } 575 ipcomp = (struct ipcomp *)(mtod(mo, char *) + roff); 576 577 /* Initialize the IPCOMP header */ 578 /* XXX alignment always correct? */ 579 switch (sav->sah->saidx.dst.sa.sa_family) { 580 #ifdef INET 581 case AF_INET: 582 ipcomp->comp_nxt = mtod(m, struct ip *)->ip_p; 583 break; 584 #endif /* INET */ 585 #ifdef INET6 586 case AF_INET6: 587 ipcomp->comp_nxt = mtod(m, struct ip6_hdr *)->ip6_nxt; 588 break; 589 #endif 590 } 591 ipcomp->comp_flags = 0; 592 593 if ((sav->flags & SADB_X_EXT_RAWCPI) == 0) 594 cpi = sav->alg_enc; 595 else 596 cpi = ntohl(sav->spi) & 0xffff; 597 ipcomp->comp_cpi = htons(cpi); 598 599 /* Fix Next Protocol in IPv4/IPv6 header */ 600 prot = IPPROTO_IPCOMP; 601 m_copyback(m, tc->tc_protoff, sizeof(uint8_t), (u_char *)&prot); 602 603 /* Adjust the length in the IP header */ 604 switch (sav->sah->saidx.dst.sa.sa_family) { 605 #ifdef INET 606 case AF_INET: 607 mtod(m, struct ip *)->ip_len = htons(m->m_pkthdr.len); 608 break; 609 #endif /* INET */ 610 #ifdef INET6 611 case AF_INET6: 612 mtod(m, struct ip6_hdr *)->ip6_plen = 613 htons(m->m_pkthdr.len) - sizeof(struct ip6_hdr); 614 break; 615 #endif /* INET6 */ 616 default: 617 IPCOMP_STATINC(IPCOMP_STAT_NOPF); 618 DPRINTF(("ipcomp_output: unknown/unsupported protocol " 619 "family %d, IPCA %s/%08lx\n", 620 sav->sah->saidx.dst.sa.sa_family, 621 ipsec_address(&sav->sah->saidx.dst), 622 (u_long) ntohl(sav->spi))); 623 error = EPFNOSUPPORT; 624 goto bad; 625 } 626 } else { 627 /* compression was useless, we have lost time */ 628 IPCOMP_STATINC(IPCOMP_STAT_USELESS); 629 DPRINTF(("ipcomp_output_cb: compression was useless : initial size was %d" 630 "and compressed size is %d\n", rlen, crp->crp_olen)); 631 } 632 633 634 /* Release the crypto descriptor */ 635 free(tc, M_XDATA); 636 crypto_freereq(crp); 637 638 /* NB: m is reclaimed by ipsec_process_done. */ 639 error = ipsec_process_done(m, isr); 640 KEY_FREESAV(&sav); 641 mutex_exit(softnet_lock); 642 splx(s); 643 return error; 644 bad: 645 if (sav) 646 KEY_FREESAV(&sav); 647 mutex_exit(softnet_lock); 648 splx(s); 649 if (m) 650 m_freem(m); 651 free(tc, M_XDATA); 652 crypto_freereq(crp); 653 return error; 654 } 655 656 static struct xformsw ipcomp_xformsw = { 657 XF_IPCOMP, XFT_COMP, "IPcomp", 658 ipcomp_init, ipcomp_zeroize, ipcomp_input, 659 ipcomp_output, 660 NULL, 661 }; 662 663 void 664 ipcomp_attach(void) 665 { 666 ipcompstat_percpu = percpu_alloc(sizeof(uint64_t) * IPCOMP_NSTATS); 667 xform_register(&ipcomp_xformsw); 668 } 669
Indexes created Tue Sep 23 07:09:52 GMT 2025