1 /* 2 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 3. Neither the name of the project nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * $FreeBSD: src/sys/net/if_gif.c,v 1.4.2.15 2002/11/08 16:57:13 ume Exp $ 30 * $DragonFly: src/sys/net/gif/if_gif.c,v 1.20 2008/01/11 11:59:41 sephe Exp $ 31 * $KAME: if_gif.c,v 1.87 2001/10/19 08:50:27 itojun Exp $ 32 */ 33 34 #include "opt_inet.h" 35 #include "opt_inet6.h" 36 37 #include <sys/param.h> 38 #include <sys/systm.h> 39 #include <sys/kernel.h> 40 #include <sys/bus.h> 41 #include <sys/malloc.h> 42 #include <sys/mbuf.h> 43 #include <sys/socket.h> 44 #include <sys/sockio.h> 45 #include <sys/errno.h> 46 #include <sys/time.h> 47 #include <sys/sysctl.h> 48 #include <sys/syslog.h> 49 #include <sys/protosw.h> 50 #include <sys/conf.h> 51 #include <sys/thread2.h> 52 53 #include <machine/cpu.h> 54 55 #include <net/if.h> 56 #include <net/if_types.h> 57 #include <net/netisr.h> 58 #include <net/route.h> 59 #include <net/bpf.h> 60 #include <net/if_clone.h> 61 62 #include <netinet/in.h> 63 #include <netinet/in_systm.h> 64 #include <netinet/ip.h> 65 #ifdef INET 66 #include <netinet/in_var.h> 67 #include <netinet/in_gif.h> 68 #include <netinet/ip_var.h> 69 #endif /* INET */ 70 71 #ifdef INET6 72 #ifndef INET 73 #include <netinet/in.h> 74 #endif 75 #include <netinet6/in6_var.h> 76 #include <netinet/ip6.h> 77 #include <netinet6/ip6_var.h> 78 #include <netinet6/in6_gif.h> 79 #include <netinet6/ip6protosw.h> 80 #endif /* INET6 */ 81 82 #include <netinet/ip_encap.h> 83 #include "if_gif.h" 84 85 #include <net/net_osdep.h> 86 87 #define GIFNAME "gif" 88 89 static MALLOC_DEFINE(M_GIF, "gif", "Generic Tunnel Interface"); 90 LIST_HEAD(, gif_softc) gif_softc_list; 91 92 int gif_clone_create (struct if_clone *, int); 93 void gif_clone_destroy (struct ifnet *); 94 95 struct if_clone gif_cloner = IF_CLONE_INITIALIZER("gif", gif_clone_create, 96 gif_clone_destroy, 0, IF_MAXUNIT); 97 98 static int gifmodevent (module_t, int, void *); 99 100 SYSCTL_DECL(_net_link); 101 SYSCTL_NODE(_net_link, IFT_GIF, gif, CTLFLAG_RW, 0, 102 "Generic Tunnel Interface"); 103 #ifndef MAX_GIF_NEST 104 /* 105 * This macro controls the default upper limitation on nesting of gif tunnels. 106 * Since, setting a large value to this macro with a careless configuration 107 * may introduce system crash, we don't allow any nestings by default. 108 * If you need to configure nested gif tunnels, you can define this macro 109 * in your kernel configuration file. However, if you do so, please be 110 * careful to configure the tunnels so that it won't make a loop. 111 */ 112 #define MAX_GIF_NEST 1 113 #endif 114 static int max_gif_nesting = MAX_GIF_NEST; 115 SYSCTL_INT(_net_link_gif, OID_AUTO, max_nesting, CTLFLAG_RW, 116 &max_gif_nesting, 0, "Max nested tunnels"); 117 118 /* 119 * By default, we disallow creation of multiple tunnels between the same 120 * pair of addresses. Some applications require this functionality so 121 * we allow control over this check here. 122 */ 123 #ifdef XBONEHACK 124 static int parallel_tunnels = 1; 125 #else 126 static int parallel_tunnels = 0; 127 #endif 128 SYSCTL_INT(_net_link_gif, OID_AUTO, parallel_tunnels, CTLFLAG_RW, 129 ¶llel_tunnels, 0, "Allow parallel tunnels?"); 130 131 int 132 gif_clone_create(struct if_clone *ifc, int unit) 133 { 134 struct gif_softc *sc; 135 136 sc = kmalloc (sizeof(struct gif_softc), M_GIF, M_WAITOK | M_ZERO); 137 138 sc->gif_if.if_softc = sc; 139 if_initname(&(sc->gif_if), GIFNAME, unit); 140 141 gifattach0(sc); 142 143 LIST_INSERT_HEAD(&gif_softc_list, sc, gif_list); 144 return (0); 145 } 146 147 void 148 gifattach0(struct gif_softc *sc) 149 { 150 151 sc->encap_cookie4 = sc->encap_cookie6 = NULL; 152 153 sc->gif_if.if_addrlen = 0; 154 sc->gif_if.if_mtu = GIF_MTU; 155 sc->gif_if.if_flags = IFF_POINTOPOINT | IFF_MULTICAST; 156 #if 0 157 /* turn off ingress filter */ 158 sc->gif_if.if_flags |= IFF_LINK2; 159 #endif 160 sc->gif_if.if_ioctl = gif_ioctl; 161 sc->gif_if.if_output = gif_output; 162 sc->gif_if.if_type = IFT_GIF; 163 sc->gif_if.if_snd.ifq_maxlen = IFQ_MAXLEN; 164 if_attach(&sc->gif_if, NULL); 165 bpfattach(&sc->gif_if, DLT_NULL, sizeof(u_int)); 166 } 167 168 void 169 gif_clone_destroy(struct ifnet *ifp) 170 { 171 int err; 172 struct gif_softc *sc = ifp->if_softc; 173 174 gif_delete_tunnel(&sc->gif_if); 175 LIST_REMOVE(sc, gif_list); 176 #ifdef INET6 177 if (sc->encap_cookie6 != NULL) { 178 err = encap_detach(sc->encap_cookie6); 179 KASSERT(err == 0, ("Unexpected error detaching encap_cookie6")); 180 } 181 #endif 182 #ifdef INET 183 if (sc->encap_cookie4 != NULL) { 184 err = encap_detach(sc->encap_cookie4); 185 KASSERT(err == 0, ("Unexpected error detaching encap_cookie4")); 186 } 187 #endif 188 189 bpfdetach(ifp); 190 if_detach(ifp); 191 192 kfree(sc, M_GIF); 193 } 194 195 static int 196 gifmodevent(module_t mod, int type, void *data) 197 { 198 199 switch (type) { 200 case MOD_LOAD: 201 LIST_INIT(&gif_softc_list); 202 if_clone_attach(&gif_cloner); 203 204 #ifdef INET6 205 ip6_gif_hlim = GIF_HLIM; 206 #endif 207 208 break; 209 case MOD_UNLOAD: 210 if_clone_detach(&gif_cloner); 211 212 while (!LIST_EMPTY(&gif_softc_list)) 213 gif_clone_destroy(&LIST_FIRST(&gif_softc_list)->gif_if); 214 215 #ifdef INET6 216 ip6_gif_hlim = 0; 217 #endif 218 break; 219 } 220 return 0; 221 } 222 223 static moduledata_t gif_mod = { 224 "if_gif", 225 gifmodevent, 226 0 227 }; 228 229 DECLARE_MODULE(if_gif, gif_mod, SI_SUB_PSEUDO, SI_ORDER_ANY); 230 231 int 232 gif_encapcheck(const struct mbuf *m, int off, int proto, void *arg) 233 { 234 struct ip ip; 235 struct gif_softc *sc; 236 237 sc = (struct gif_softc *)arg; 238 if (sc == NULL) 239 return 0; 240 241 if ((sc->gif_if.if_flags & IFF_UP) == 0) 242 return 0; 243 244 /* no physical address */ 245 if (!sc->gif_psrc || !sc->gif_pdst) 246 return 0; 247 248 switch (proto) { 249 #ifdef INET 250 case IPPROTO_IPV4: 251 break; 252 #endif 253 #ifdef INET6 254 case IPPROTO_IPV6: 255 break; 256 #endif 257 default: 258 return 0; 259 } 260 261 /* Bail on short packets */ 262 if (m->m_pkthdr.len < sizeof(ip)) 263 return 0; 264 265 m_copydata(m, 0, sizeof(ip), (caddr_t)&ip); 266 267 switch (ip.ip_v) { 268 #ifdef INET 269 case 4: 270 if (sc->gif_psrc->sa_family != AF_INET || 271 sc->gif_pdst->sa_family != AF_INET) 272 return 0; 273 return gif_encapcheck4(m, off, proto, arg); 274 #endif 275 #ifdef INET6 276 case 6: 277 if (m->m_pkthdr.len < sizeof(struct ip6_hdr)) 278 return 0; 279 if (sc->gif_psrc->sa_family != AF_INET6 || 280 sc->gif_pdst->sa_family != AF_INET6) 281 return 0; 282 return gif_encapcheck6(m, off, proto, arg); 283 #endif 284 default: 285 return 0; 286 } 287 } 288 289 /* 290 * Parameters: 291 * rt: added in net2 292 */ 293 int 294 gif_output(struct ifnet *ifp, struct mbuf *m, struct sockaddr *dst, 295 struct rtentry *rt) 296 { 297 struct gif_softc *sc = (struct gif_softc*)ifp; 298 int error = 0; 299 static int called = 0; /* XXX: MUTEX */ 300 301 /* 302 * gif may cause infinite recursion calls when misconfigured. 303 * We'll prevent this by introducing upper limit. 304 * XXX: this mechanism may introduce another problem about 305 * mutual exclusion of the variable CALLED, especially if we 306 * use kernel thread. 307 */ 308 if (++called > max_gif_nesting) { 309 log(LOG_NOTICE, 310 "gif_output: recursively called too many times(%d)\n", 311 called); 312 m_freem(m); 313 error = EIO; /* is there better errno? */ 314 goto end; 315 } 316 317 m->m_flags &= ~(M_BCAST|M_MCAST); 318 if (!(ifp->if_flags & IFF_UP) || 319 sc->gif_psrc == NULL || sc->gif_pdst == NULL) { 320 m_freem(m); 321 error = ENETDOWN; 322 goto end; 323 } 324 325 if (ifp->if_bpf) { 326 /* 327 * We need to prepend the address family as 328 * a four byte field. 329 */ 330 uint32_t af = dst->sa_family; 331 332 bpf_ptap(ifp->if_bpf, m, &af, sizeof(4)); 333 } 334 ifp->if_opackets++; 335 ifp->if_obytes += m->m_pkthdr.len; 336 337 /* inner AF-specific encapsulation */ 338 339 /* XXX should we check if our outer source is legal? */ 340 341 /* dispatch to output logic based on outer AF */ 342 switch (sc->gif_psrc->sa_family) { 343 #ifdef INET 344 case AF_INET: 345 error = in_gif_output(ifp, dst->sa_family, m); 346 break; 347 #endif 348 #ifdef INET6 349 case AF_INET6: 350 error = in6_gif_output(ifp, dst->sa_family, m); 351 break; 352 #endif 353 default: 354 m_freem(m); 355 error = ENETDOWN; 356 goto end; 357 } 358 359 end: 360 called = 0; /* reset recursion counter */ 361 if (error) 362 ifp->if_oerrors++; 363 return error; 364 } 365 366 void 367 gif_input(struct mbuf *m, int af, struct ifnet *ifp) 368 { 369 int isr; 370 371 if (ifp == NULL) { 372 /* just in case */ 373 m_freem(m); 374 return; 375 } 376 377 m->m_pkthdr.rcvif = ifp; 378 379 if (ifp->if_bpf) { 380 /* 381 * We need to prepend the address family as 382 * a four byte field. 383 */ 384 uint32_t af1 = af; 385 386 bpf_ptap(ifp->if_bpf, m, &af1, sizeof(af1)); 387 } 388 389 /* 390 * Put the packet to the network layer input queue according to the 391 * specified address family. 392 * Note: older versions of gif_input directly called network layer 393 * input functions, e.g. ip6_input, here. We changed the policy to 394 * prevent too many recursive calls of such input functions, which 395 * might cause kernel panic. But the change may introduce another 396 * problem; if the input queue is full, packets are discarded. 397 * The kernel stack overflow really happened, and we believed 398 * queue-full rarely occurs, so we changed the policy. 399 */ 400 switch (af) { 401 #ifdef INET 402 case AF_INET: 403 isr = NETISR_IP; 404 break; 405 #endif 406 #ifdef INET6 407 case AF_INET6: 408 isr = NETISR_IPV6; 409 break; 410 #endif 411 default: 412 m_freem(m); 413 return; 414 } 415 416 ifp->if_ipackets++; 417 ifp->if_ibytes += m->m_pkthdr.len; 418 netisr_dispatch(isr, m); 419 420 return; 421 } 422 423 /* XXX how should we handle IPv6 scope on SIOC[GS]IFPHYADDR? */ 424 int 425 gif_ioctl(struct ifnet *ifp, u_long cmd, caddr_t data, struct ucred *cr) 426 { 427 struct gif_softc *sc = (struct gif_softc*)ifp; 428 struct ifreq *ifr = (struct ifreq*)data; 429 int error = 0, size; 430 struct sockaddr *dst, *src; 431 #ifdef SIOCSIFMTU /* xxx */ 432 u_long mtu; 433 #endif 434 435 switch (cmd) { 436 case SIOCSIFADDR: 437 ifp->if_flags |= IFF_UP; 438 break; 439 440 case SIOCSIFDSTADDR: 441 break; 442 443 case SIOCADDMULTI: 444 case SIOCDELMULTI: 445 break; 446 447 #ifdef SIOCSIFMTU /* xxx */ 448 case SIOCGIFMTU: 449 break; 450 451 case SIOCSIFMTU: 452 mtu = ifr->ifr_mtu; 453 if (mtu < GIF_MTU_MIN || mtu > GIF_MTU_MAX) 454 return (EINVAL); 455 ifp->if_mtu = mtu; 456 break; 457 #endif /* SIOCSIFMTU */ 458 459 #ifdef INET 460 case SIOCSIFPHYADDR: 461 #endif 462 #ifdef INET6 463 case SIOCSIFPHYADDR_IN6: 464 #endif /* INET6 */ 465 case SIOCSLIFPHYADDR: 466 switch (cmd) { 467 #ifdef INET 468 case SIOCSIFPHYADDR: 469 src = (struct sockaddr *) 470 &(((struct in_aliasreq *)data)->ifra_addr); 471 dst = (struct sockaddr *) 472 &(((struct in_aliasreq *)data)->ifra_dstaddr); 473 break; 474 #endif 475 #ifdef INET6 476 case SIOCSIFPHYADDR_IN6: 477 src = (struct sockaddr *) 478 &(((struct in6_aliasreq *)data)->ifra_addr); 479 dst = (struct sockaddr *) 480 &(((struct in6_aliasreq *)data)->ifra_dstaddr); 481 break; 482 #endif 483 case SIOCSLIFPHYADDR: 484 src = (struct sockaddr *) 485 &(((struct if_laddrreq *)data)->addr); 486 dst = (struct sockaddr *) 487 &(((struct if_laddrreq *)data)->dstaddr); 488 break; 489 default: 490 return EINVAL; 491 } 492 493 /* sa_family must be equal */ 494 if (src->sa_family != dst->sa_family) 495 return EINVAL; 496 497 /* validate sa_len */ 498 switch (src->sa_family) { 499 #ifdef INET 500 case AF_INET: 501 if (src->sa_len != sizeof(struct sockaddr_in)) 502 return EINVAL; 503 break; 504 #endif 505 #ifdef INET6 506 case AF_INET6: 507 if (src->sa_len != sizeof(struct sockaddr_in6)) 508 return EINVAL; 509 break; 510 #endif 511 default: 512 return EAFNOSUPPORT; 513 } 514 switch (dst->sa_family) { 515 #ifdef INET 516 case AF_INET: 517 if (dst->sa_len != sizeof(struct sockaddr_in)) 518 return EINVAL; 519 break; 520 #endif 521 #ifdef INET6 522 case AF_INET6: 523 if (dst->sa_len != sizeof(struct sockaddr_in6)) 524 return EINVAL; 525 break; 526 #endif 527 default: 528 return EAFNOSUPPORT; 529 } 530 531 /* check sa_family looks sane for the cmd */ 532 switch (cmd) { 533 case SIOCSIFPHYADDR: 534 if (src->sa_family == AF_INET) 535 break; 536 return EAFNOSUPPORT; 537 #ifdef INET6 538 case SIOCSIFPHYADDR_IN6: 539 if (src->sa_family == AF_INET6) 540 break; 541 return EAFNOSUPPORT; 542 #endif /* INET6 */ 543 case SIOCSLIFPHYADDR: 544 /* checks done in the above */ 545 break; 546 } 547 548 error = gif_set_tunnel(&sc->gif_if, src, dst); 549 break; 550 551 #ifdef SIOCDIFPHYADDR 552 case SIOCDIFPHYADDR: 553 gif_delete_tunnel(&sc->gif_if); 554 break; 555 #endif 556 557 case SIOCGIFPSRCADDR: 558 #ifdef INET6 559 case SIOCGIFPSRCADDR_IN6: 560 #endif /* INET6 */ 561 if (sc->gif_psrc == NULL) { 562 error = EADDRNOTAVAIL; 563 goto bad; 564 } 565 src = sc->gif_psrc; 566 switch (cmd) { 567 #ifdef INET 568 case SIOCGIFPSRCADDR: 569 dst = &ifr->ifr_addr; 570 size = sizeof(ifr->ifr_addr); 571 break; 572 #endif /* INET */ 573 #ifdef INET6 574 case SIOCGIFPSRCADDR_IN6: 575 dst = (struct sockaddr *) 576 &(((struct in6_ifreq *)data)->ifr_addr); 577 size = sizeof(((struct in6_ifreq *)data)->ifr_addr); 578 break; 579 #endif /* INET6 */ 580 default: 581 error = EADDRNOTAVAIL; 582 goto bad; 583 } 584 if (src->sa_len > size) 585 return EINVAL; 586 bcopy((caddr_t)src, (caddr_t)dst, src->sa_len); 587 break; 588 589 case SIOCGIFPDSTADDR: 590 #ifdef INET6 591 case SIOCGIFPDSTADDR_IN6: 592 #endif /* INET6 */ 593 if (sc->gif_pdst == NULL) { 594 error = EADDRNOTAVAIL; 595 goto bad; 596 } 597 src = sc->gif_pdst; 598 switch (cmd) { 599 #ifdef INET 600 case SIOCGIFPDSTADDR: 601 dst = &ifr->ifr_addr; 602 size = sizeof(ifr->ifr_addr); 603 break; 604 #endif /* INET */ 605 #ifdef INET6 606 case SIOCGIFPDSTADDR_IN6: 607 dst = (struct sockaddr *) 608 &(((struct in6_ifreq *)data)->ifr_addr); 609 size = sizeof(((struct in6_ifreq *)data)->ifr_addr); 610 break; 611 #endif /* INET6 */ 612 default: 613 error = EADDRNOTAVAIL; 614 goto bad; 615 } 616 if (src->sa_len > size) 617 return EINVAL; 618 bcopy((caddr_t)src, (caddr_t)dst, src->sa_len); 619 break; 620 621 case SIOCGLIFPHYADDR: 622 if (sc->gif_psrc == NULL || sc->gif_pdst == NULL) { 623 error = EADDRNOTAVAIL; 624 goto bad; 625 } 626 627 /* copy src */ 628 src = sc->gif_psrc; 629 dst = (struct sockaddr *) 630 &(((struct if_laddrreq *)data)->addr); 631 size = sizeof(((struct if_laddrreq *)data)->addr); 632 if (src->sa_len > size) 633 return EINVAL; 634 bcopy((caddr_t)src, (caddr_t)dst, src->sa_len); 635 636 /* copy dst */ 637 src = sc->gif_pdst; 638 dst = (struct sockaddr *) 639 &(((struct if_laddrreq *)data)->dstaddr); 640 size = sizeof(((struct if_laddrreq *)data)->dstaddr); 641 if (src->sa_len > size) 642 return EINVAL; 643 bcopy((caddr_t)src, (caddr_t)dst, src->sa_len); 644 break; 645 646 case SIOCSIFFLAGS: 647 /* if_ioctl() takes care of it */ 648 break; 649 650 default: 651 error = EINVAL; 652 break; 653 } 654 bad: 655 return error; 656 } 657 658 int 659 gif_set_tunnel(struct ifnet *ifp, struct sockaddr *src, struct sockaddr *dst) 660 { 661 struct gif_softc *sc = (struct gif_softc *)ifp; 662 struct gif_softc *sc2; 663 struct sockaddr *osrc, *odst, *sa; 664 int error = 0; 665 666 crit_enter(); 667 668 LIST_FOREACH(sc2, &gif_softc_list, gif_list) { 669 if (sc2 == sc) 670 continue; 671 if (!sc2->gif_pdst || !sc2->gif_psrc) 672 continue; 673 if (sc2->gif_pdst->sa_family != dst->sa_family || 674 sc2->gif_pdst->sa_len != dst->sa_len || 675 sc2->gif_psrc->sa_family != src->sa_family || 676 sc2->gif_psrc->sa_len != src->sa_len) 677 continue; 678 679 /* 680 * Disallow parallel tunnels unless instructed 681 * otherwise. 682 */ 683 if (!parallel_tunnels && 684 bcmp(sc2->gif_pdst, dst, dst->sa_len) == 0 && 685 bcmp(sc2->gif_psrc, src, src->sa_len) == 0) { 686 error = EADDRNOTAVAIL; 687 goto bad; 688 } 689 690 /* XXX both end must be valid? (I mean, not 0.0.0.0) */ 691 } 692 693 /* XXX we can detach from both, but be polite just in case */ 694 if (sc->gif_psrc) 695 switch (sc->gif_psrc->sa_family) { 696 #ifdef INET 697 case AF_INET: 698 in_gif_detach(sc); 699 break; 700 #endif 701 #ifdef INET6 702 case AF_INET6: 703 in6_gif_detach(sc); 704 break; 705 #endif 706 } 707 708 osrc = sc->gif_psrc; 709 sa = (struct sockaddr *)kmalloc(src->sa_len, M_IFADDR, M_WAITOK); 710 bcopy((caddr_t)src, (caddr_t)sa, src->sa_len); 711 sc->gif_psrc = sa; 712 713 odst = sc->gif_pdst; 714 sa = (struct sockaddr *)kmalloc(dst->sa_len, M_IFADDR, M_WAITOK); 715 bcopy((caddr_t)dst, (caddr_t)sa, dst->sa_len); 716 sc->gif_pdst = sa; 717 718 switch (sc->gif_psrc->sa_family) { 719 #ifdef INET 720 case AF_INET: 721 error = in_gif_attach(sc); 722 break; 723 #endif 724 #ifdef INET6 725 case AF_INET6: 726 error = in6_gif_attach(sc); 727 break; 728 #endif 729 } 730 if (error) { 731 /* rollback */ 732 kfree((caddr_t)sc->gif_psrc, M_IFADDR); 733 kfree((caddr_t)sc->gif_pdst, M_IFADDR); 734 sc->gif_psrc = osrc; 735 sc->gif_pdst = odst; 736 goto bad; 737 } 738 739 if (osrc) 740 kfree((caddr_t)osrc, M_IFADDR); 741 if (odst) 742 kfree((caddr_t)odst, M_IFADDR); 743 744 if (sc->gif_psrc && sc->gif_pdst) 745 ifp->if_flags |= IFF_RUNNING; 746 else 747 ifp->if_flags &= ~IFF_RUNNING; 748 crit_exit(); 749 750 return 0; 751 752 bad: 753 if (sc->gif_psrc && sc->gif_pdst) 754 ifp->if_flags |= IFF_RUNNING; 755 else 756 ifp->if_flags &= ~IFF_RUNNING; 757 crit_exit(); 758 759 return error; 760 } 761 762 void 763 gif_delete_tunnel(struct ifnet *ifp) 764 { 765 struct gif_softc *sc = (struct gif_softc *)ifp; 766 767 crit_enter(); 768 769 if (sc->gif_psrc) { 770 kfree((caddr_t)sc->gif_psrc, M_IFADDR); 771 sc->gif_psrc = NULL; 772 } 773 if (sc->gif_pdst) { 774 kfree((caddr_t)sc->gif_pdst, M_IFADDR); 775 sc->gif_pdst = NULL; 776 } 777 /* it is safe to detach from both */ 778 #ifdef INET 779 in_gif_detach(sc); 780 #endif 781 #ifdef INET6 782 in6_gif_detach(sc); 783 #endif 784 785 if (sc->gif_psrc && sc->gif_pdst) 786 ifp->if_flags |= IFF_RUNNING; 787 else 788 ifp->if_flags &= ~IFF_RUNNING; 789 crit_exit(); 790 } 791