1 /* $FreeBSD$ */ 2 /* $KAME: if_gif.c,v 1.47 2001/05/01 05:28:42 itojun Exp $ */ 3 4 /* 5 * Copyright (C) 1995, 1996, 1997, and 1998 WIDE Project. 6 * All rights reserved. 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 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the project nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE PROJECT AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE PROJECT OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 */ 32 33 #include "opt_inet.h" 34 #include "opt_inet6.h" 35 36 #include <sys/param.h> 37 #include <sys/systm.h> 38 #include <sys/kernel.h> 39 #include <sys/malloc.h> 40 #include <sys/mbuf.h> 41 #include <sys/socket.h> 42 #include <sys/sockio.h> 43 #include <sys/errno.h> 44 #include <sys/time.h> 45 #include <sys/syslog.h> 46 #include <sys/protosw.h> 47 #include <sys/conf.h> 48 #include <machine/bus.h> /* XXX: Shouldn't really be required! */ 49 #include <sys/rman.h> 50 #include <machine/cpu.h> 51 52 #include <net/if.h> 53 #include <net/if_types.h> 54 #include <net/netisr.h> 55 #include <net/route.h> 56 #include <net/bpf.h> 57 58 #include <netinet/in.h> 59 #include <netinet/in_systm.h> 60 #include <netinet/ip.h> 61 #ifdef INET 62 #include <netinet/in_var.h> 63 #include <netinet/in_gif.h> 64 #include <netinet/ip_var.h> 65 #endif /* INET */ 66 67 #ifdef INET6 68 #ifndef INET 69 #include <netinet/in.h> 70 #endif 71 #include <netinet6/in6_var.h> 72 #include <netinet/ip6.h> 73 #include <netinet6/ip6_var.h> 74 #include <netinet6/in6_gif.h> 75 #include <netinet6/ip6protosw.h> 76 #endif /* INET6 */ 77 78 #include <netinet/ip_encap.h> 79 #include <net/if_gif.h> 80 81 #include <net/net_osdep.h> 82 83 #define GIFNAME "gif" 84 #define GIFDEV "if_gif" 85 #define GIF_MAXUNIT 0x7fff /* ifp->if_unit is only 15 bits */ 86 87 static MALLOC_DEFINE(M_GIF, "gif", "Generic Tunnel Interface"); 88 static struct rman gifunits[1]; 89 TAILQ_HEAD(gifhead, gif_softc) gifs = TAILQ_HEAD_INITIALIZER(gifs); 90 91 int gif_clone_create __P((struct if_clone *, int *)); 92 void gif_clone_destroy __P((struct ifnet *)); 93 94 struct if_clone gif_cloner = 95 IF_CLONE_INITIALIZER("gif", gif_clone_create, gif_clone_destroy); 96 97 static int gifmodevent __P((module_t, int, void *)); 98 void gif_delete_tunnel __P((struct gif_softc *)); 99 static int gif_encapcheck __P((const struct mbuf *, int, int, void *)); 100 101 #ifdef INET 102 extern struct domain inetdomain; 103 struct protosw in_gif_protosw = 104 { SOCK_RAW, &inetdomain, 0/*IPPROTO_IPV[46]*/, PR_ATOMIC|PR_ADDR, 105 in_gif_input, rip_output, 0, rip_ctloutput, 106 0, 107 0, 0, 0, 0, 108 &rip_usrreqs 109 }; 110 #endif 111 #ifdef INET6 112 extern struct domain6 inet6domain; 113 struct ip6protosw in6_gif_protosw = 114 { SOCK_RAW, &inet6domain, 0/*IPPROTO_IPV[46]*/, PR_ATOMIC|PR_ADDR, 115 in6_gif_input, rip6_output, 0, rip6_ctloutput, 116 0, 117 0, 0, 0, 0, 118 &rip6_usrreqs 119 }; 120 #endif 121 122 #ifndef MAX_GIF_NEST 123 /* 124 * This macro controls the upper limitation on nesting of gif tunnels. 125 * Since, setting a large value to this macro with a careless configuration 126 * may introduce system crash, we don't allow any nestings by default. 127 * If you need to configure nested gif tunnels, you can define this macro 128 * in your kernel configuration file. However, if you do so, please be 129 * careful to configure the tunnels so that it won't make a loop. 130 */ 131 #define MAX_GIF_NEST 1 132 #endif 133 static int max_gif_nesting = MAX_GIF_NEST; 134 135 int 136 gif_clone_create(ifc, unit) 137 struct if_clone *ifc; 138 int *unit; 139 { 140 struct resource *r; 141 struct gif_softc *sc; 142 143 if (*unit > GIF_MAXUNIT) 144 return (ENXIO); 145 146 if (*unit < 0) { 147 r = rman_reserve_resource(gifunits, 0, GIF_MAXUNIT, 1, 148 RF_ALLOCATED | RF_ACTIVE, NULL); 149 if (r == NULL) 150 return (ENOSPC); 151 *unit = rman_get_start(r); 152 } else { 153 r = rman_reserve_resource(gifunits, *unit, *unit, 1, 154 RF_ALLOCATED | RF_ACTIVE, NULL); 155 if (r == NULL) 156 return (EEXIST); 157 } 158 159 sc = malloc (sizeof(struct gif_softc), M_GIF, M_WAITOK); 160 bzero(sc, sizeof(struct gif_softc)); 161 162 sc->gif_if.if_softc = sc; 163 sc->gif_if.if_name = GIFNAME; 164 sc->gif_if.if_unit = *unit; 165 sc->r_unit = r; 166 167 sc->encap_cookie4 = sc->encap_cookie6 = NULL; 168 #ifdef INET 169 sc->encap_cookie4 = encap_attach_func(AF_INET, -1, 170 gif_encapcheck, (struct protosw*)&in_gif_protosw, sc); 171 if (sc->encap_cookie4 == NULL) { 172 printf("%s: unable to attach encap4\n", if_name(&sc->gif_if)); 173 free(sc, M_GIF); 174 return (EIO); /* XXX */ 175 } 176 #endif 177 #ifdef INET6 178 sc->encap_cookie6 = encap_attach_func(AF_INET6, -1, 179 gif_encapcheck, (struct protosw *)&in6_gif_protosw, sc); 180 if (sc->encap_cookie6 == NULL) { 181 if (sc->encap_cookie4) { 182 encap_detach(sc->encap_cookie4); 183 sc->encap_cookie4 = NULL; 184 } 185 printf("%s: unable to attach encap6\n", if_name(&sc->gif_if)); 186 free(sc, M_GIF); 187 return (EIO); /* XXX */ 188 } 189 #endif 190 191 sc->gif_if.if_mtu = GIF_MTU; 192 sc->gif_if.if_flags = IFF_POINTOPOINT | IFF_MULTICAST; 193 #if 0 194 /* turn off ingress filter */ 195 sc->gif_if.if_flags |= IFF_LINK2; 196 #endif 197 sc->gif_if.if_ioctl = gif_ioctl; 198 sc->gif_if.if_output = gif_output; 199 sc->gif_if.if_type = IFT_GIF; 200 sc->gif_if.if_snd.ifq_maxlen = IFQ_MAXLEN; 201 if_attach(&sc->gif_if); 202 bpfattach(&sc->gif_if, DLT_NULL, sizeof(u_int)); 203 TAILQ_INSERT_TAIL(&gifs, sc, gif_link); 204 return (0); 205 } 206 207 void 208 gif_clone_destroy(ifp) 209 struct ifnet *ifp; 210 { 211 int err; 212 struct gif_softc *sc = ifp->if_softc; 213 214 gif_delete_tunnel(sc); 215 TAILQ_REMOVE(&gifs, sc, gif_link); 216 if (sc->encap_cookie4 != NULL) { 217 err = encap_detach(sc->encap_cookie4); 218 KASSERT(err == 0, ("Unexpected error detaching encap_cookie4")); 219 } 220 if (sc->encap_cookie6 != NULL) { 221 err = encap_detach(sc->encap_cookie6); 222 KASSERT(err == 0, ("Unexpected error detaching encap_cookie6")); 223 } 224 225 bpfdetach(ifp); 226 if_detach(ifp); 227 228 err = rman_release_resource(sc->r_unit); 229 KASSERT(err == 0, ("Unexpected error freeing resource")); 230 231 free(sc, M_GIF); 232 } 233 234 static int 235 gifmodevent(mod, type, data) 236 module_t mod; 237 int type; 238 void *data; 239 { 240 int err; 241 242 switch (type) { 243 case MOD_LOAD: 244 gifunits->rm_type = RMAN_ARRAY; 245 gifunits->rm_descr = "configurable if_gif units"; 246 err = rman_init(gifunits); 247 if (err != 0) 248 return (err); 249 err = rman_manage_region(gifunits, 0, GIF_MAXUNIT); 250 if (err != 0) { 251 printf("%s: gifunits: rman_manage_region: Failed %d\n", 252 GIFNAME, err); 253 rman_fini(gifunits); 254 return (err); 255 } 256 if_clone_attach(&gif_cloner); 257 258 #ifdef INET6 259 ip6_gif_hlim = GIF_HLIM; 260 #endif 261 262 break; 263 case MOD_UNLOAD: 264 if_clone_detach(&gif_cloner); 265 266 while (!TAILQ_EMPTY(&gifs)) 267 gif_clone_destroy(&TAILQ_FIRST(&gifs)->gif_if); 268 269 err = rman_fini(gifunits); 270 if (err != 0) 271 return (err); 272 #ifdef INET6 273 ip6_gif_hlim = 0; 274 #endif 275 break; 276 } 277 return 0; 278 } 279 280 static moduledata_t gif_mod = { 281 "if_gif", 282 gifmodevent, 283 0 284 }; 285 286 DECLARE_MODULE(if_gif, gif_mod, SI_SUB_PSEUDO, SI_ORDER_ANY); 287 288 static int 289 gif_encapcheck(m, off, proto, arg) 290 const struct mbuf *m; 291 int off; 292 int proto; 293 void *arg; 294 { 295 struct ip ip; 296 struct gif_softc *sc; 297 298 sc = (struct gif_softc *)arg; 299 if (sc == NULL) 300 return 0; 301 302 if ((sc->gif_if.if_flags & IFF_UP) == 0) 303 return 0; 304 305 /* no physical address */ 306 if (!sc->gif_psrc || !sc->gif_pdst) 307 return 0; 308 309 switch (proto) { 310 #ifdef INET 311 case IPPROTO_IPV4: 312 break; 313 #endif 314 #ifdef INET6 315 case IPPROTO_IPV6: 316 break; 317 #endif 318 default: 319 return 0; 320 } 321 322 /* LINTED const cast */ 323 m_copydata((struct mbuf *)m, 0, sizeof(ip), (caddr_t)&ip); 324 325 switch (ip.ip_v) { 326 #ifdef INET 327 case 4: 328 if (sc->gif_psrc->sa_family != AF_INET || 329 sc->gif_pdst->sa_family != AF_INET) 330 return 0; 331 return gif_encapcheck4(m, off, proto, arg); 332 #endif 333 #ifdef INET6 334 case 6: 335 if (sc->gif_psrc->sa_family != AF_INET6 || 336 sc->gif_pdst->sa_family != AF_INET6) 337 return 0; 338 return gif_encapcheck6(m, off, proto, arg); 339 #endif 340 default: 341 return 0; 342 } 343 } 344 345 int 346 gif_output(ifp, m, dst, rt) 347 struct ifnet *ifp; 348 struct mbuf *m; 349 struct sockaddr *dst; 350 struct rtentry *rt; /* added in net2 */ 351 { 352 struct gif_softc *sc = (struct gif_softc*)ifp; 353 int error = 0; 354 static int called = 0; /* XXX: MUTEX */ 355 356 /* 357 * gif may cause infinite recursion calls when misconfigured. 358 * We'll prevent this by introducing upper limit. 359 * XXX: this mechanism may introduce another problem about 360 * mutual exclusion of the variable CALLED, especially if we 361 * use kernel thread. 362 */ 363 if (++called > max_gif_nesting) { 364 log(LOG_NOTICE, 365 "gif_output: recursively called too many times(%d)\n", 366 called); 367 m_freem(m); 368 error = EIO; /* is there better errno? */ 369 goto end; 370 } 371 372 m->m_flags &= ~(M_BCAST|M_MCAST); 373 if (!(ifp->if_flags & IFF_UP) || 374 sc->gif_psrc == NULL || sc->gif_pdst == NULL) { 375 m_freem(m); 376 error = ENETDOWN; 377 goto end; 378 } 379 380 if (ifp->if_bpf) { 381 /* 382 * We need to prepend the address family as 383 * a four byte field. Cons up a dummy header 384 * to pacify bpf. This is safe because bpf 385 * will only read from the mbuf (i.e., it won't 386 * try to free it or keep a pointer a to it). 387 */ 388 struct mbuf m0; 389 u_int32_t af = dst->sa_family; 390 391 m0.m_next = m; 392 m0.m_len = 4; 393 m0.m_data = (char *)⁡ 394 395 bpf_mtap(ifp, &m0); 396 } 397 ifp->if_opackets++; 398 ifp->if_obytes += m->m_pkthdr.len; 399 400 /* inner AF-specific encapsulation */ 401 402 /* XXX should we check if our outer source is legal? */ 403 404 /* dispatch to output logic based on outer AF */ 405 switch (sc->gif_psrc->sa_family) { 406 #ifdef INET 407 case AF_INET: 408 error = in_gif_output(ifp, dst->sa_family, m, rt); 409 break; 410 #endif 411 #ifdef INET6 412 case AF_INET6: 413 error = in6_gif_output(ifp, dst->sa_family, m, rt); 414 break; 415 #endif 416 default: 417 m_freem(m); 418 error = ENETDOWN; 419 goto end; 420 } 421 422 end: 423 called = 0; /* reset recursion counter */ 424 if (error) 425 ifp->if_oerrors++; 426 return error; 427 } 428 429 void 430 gif_input(m, af, gifp) 431 struct mbuf *m; 432 int af; 433 struct ifnet *gifp; 434 { 435 int isr; 436 struct ifqueue *ifq = 0; 437 438 if (gifp == NULL) { 439 /* just in case */ 440 m_freem(m); 441 return; 442 } 443 444 m->m_pkthdr.rcvif = gifp; 445 446 if (gifp->if_bpf) { 447 /* 448 * We need to prepend the address family as 449 * a four byte field. Cons up a dummy header 450 * to pacify bpf. This is safe because bpf 451 * will only read from the mbuf (i.e., it won't 452 * try to free it or keep a pointer a to it). 453 */ 454 struct mbuf m0; 455 u_int32_t af1 = af; 456 457 m0.m_next = m; 458 m0.m_len = 4; 459 m0.m_data = (char *)&af1; 460 461 bpf_mtap(gifp, &m0); 462 } 463 464 /* 465 * Put the packet to the network layer input queue according to the 466 * specified address family. 467 * Note: older versions of gif_input directly called network layer 468 * input functions, e.g. ip6_input, here. We changed the policy to 469 * prevent too many recursive calls of such input functions, which 470 * might cause kernel panic. But the change may introduce another 471 * problem; if the input queue is full, packets are discarded. 472 * We believed it rarely occurs and changed the policy. If we find 473 * it occurs more times than we thought, we may change the policy 474 * again. 475 */ 476 switch (af) { 477 #ifdef INET 478 case AF_INET: 479 ifq = &ipintrq; 480 isr = NETISR_IP; 481 break; 482 #endif 483 #ifdef INET6 484 case AF_INET6: 485 ifq = &ip6intrq; 486 isr = NETISR_IPV6; 487 break; 488 #endif 489 default: 490 m_freem(m); 491 return; 492 } 493 494 gifp->if_ipackets++; 495 gifp->if_ibytes += m->m_pkthdr.len; 496 (void) IF_HANDOFF(ifq, m, NULL); 497 /* we need schednetisr since the address family may change */ 498 schednetisr(isr); 499 500 return; 501 } 502 503 /* XXX how should we handle IPv6 scope on SIOC[GS]IFPHYADDR? */ 504 int 505 gif_ioctl(ifp, cmd, data) 506 struct ifnet *ifp; 507 u_long cmd; 508 caddr_t data; 509 { 510 struct gif_softc *sc = (struct gif_softc*)ifp; 511 struct ifreq *ifr = (struct ifreq*)data; 512 int error = 0, size; 513 struct sockaddr *dst, *src; 514 struct sockaddr *sa; 515 int s; 516 struct ifnet *ifp2; 517 struct gif_softc *sc2; 518 519 switch (cmd) { 520 case SIOCSIFADDR: 521 break; 522 523 case SIOCSIFDSTADDR: 524 break; 525 526 case SIOCADDMULTI: 527 case SIOCDELMULTI: 528 break; 529 530 #ifdef SIOCSIFMTU /* xxx */ 531 case SIOCGIFMTU: 532 break; 533 534 case SIOCSIFMTU: 535 { 536 u_long mtu; 537 mtu = ifr->ifr_mtu; 538 if (mtu < GIF_MTU_MIN || mtu > GIF_MTU_MAX) { 539 return (EINVAL); 540 } 541 ifp->if_mtu = mtu; 542 } 543 break; 544 #endif /* SIOCSIFMTU */ 545 546 case SIOCSIFPHYADDR: 547 #ifdef INET6 548 case SIOCSIFPHYADDR_IN6: 549 #endif /* INET6 */ 550 case SIOCSLIFPHYADDR: 551 switch (cmd) { 552 #ifdef INET 553 case SIOCSIFPHYADDR: 554 src = (struct sockaddr *) 555 &(((struct in_aliasreq *)data)->ifra_addr); 556 dst = (struct sockaddr *) 557 &(((struct in_aliasreq *)data)->ifra_dstaddr); 558 break; 559 #endif 560 #ifdef INET6 561 case SIOCSIFPHYADDR_IN6: 562 src = (struct sockaddr *) 563 &(((struct in6_aliasreq *)data)->ifra_addr); 564 dst = (struct sockaddr *) 565 &(((struct in6_aliasreq *)data)->ifra_dstaddr); 566 break; 567 #endif 568 case SIOCSLIFPHYADDR: 569 src = (struct sockaddr *) 570 &(((struct if_laddrreq *)data)->addr); 571 dst = (struct sockaddr *) 572 &(((struct if_laddrreq *)data)->dstaddr); 573 } 574 575 /* sa_family must be equal */ 576 if (src->sa_family != dst->sa_family) 577 return EINVAL; 578 579 /* validate sa_len */ 580 switch (src->sa_family) { 581 #ifdef INET 582 case AF_INET: 583 if (src->sa_len != sizeof(struct sockaddr_in)) 584 return EINVAL; 585 break; 586 #endif 587 #ifdef INET6 588 case AF_INET6: 589 if (src->sa_len != sizeof(struct sockaddr_in6)) 590 return EINVAL; 591 break; 592 #endif 593 default: 594 return EAFNOSUPPORT; 595 } 596 switch (dst->sa_family) { 597 #ifdef INET 598 case AF_INET: 599 if (dst->sa_len != sizeof(struct sockaddr_in)) 600 return EINVAL; 601 break; 602 #endif 603 #ifdef INET6 604 case AF_INET6: 605 if (dst->sa_len != sizeof(struct sockaddr_in6)) 606 return EINVAL; 607 break; 608 #endif 609 default: 610 return EAFNOSUPPORT; 611 } 612 613 /* check sa_family looks sane for the cmd */ 614 switch (cmd) { 615 case SIOCSIFPHYADDR: 616 if (src->sa_family == AF_INET) 617 break; 618 return EAFNOSUPPORT; 619 #ifdef INET6 620 case SIOCSIFPHYADDR_IN6: 621 if (src->sa_family == AF_INET6) 622 break; 623 return EAFNOSUPPORT; 624 #endif /* INET6 */ 625 case SIOCSLIFPHYADDR: 626 /* checks done in the above */ 627 break; 628 } 629 630 TAILQ_FOREACH(ifp2, &ifnet, if_link) { 631 if (strcmp(ifp2->if_name, GIFNAME) != 0) 632 continue; 633 sc2 = ifp2->if_softc; 634 if (sc2 == sc) 635 continue; 636 if (!sc2->gif_pdst || !sc2->gif_psrc) 637 continue; 638 if (sc2->gif_pdst->sa_family != dst->sa_family || 639 sc2->gif_pdst->sa_len != dst->sa_len || 640 sc2->gif_psrc->sa_family != src->sa_family || 641 sc2->gif_psrc->sa_len != src->sa_len) 642 continue; 643 #ifndef XBONEHACK 644 /* can't configure same pair of address onto two gifs */ 645 if (bcmp(sc2->gif_pdst, dst, dst->sa_len) == 0 && 646 bcmp(sc2->gif_psrc, src, src->sa_len) == 0) { 647 error = EADDRNOTAVAIL; 648 goto bad; 649 } 650 #endif 651 652 /* can't configure multiple multi-dest interfaces */ 653 #define multidest(x) \ 654 (((struct sockaddr_in *)(x))->sin_addr.s_addr == INADDR_ANY) 655 #ifdef INET6 656 #define multidest6(x) \ 657 (IN6_IS_ADDR_UNSPECIFIED(&((struct sockaddr_in6 *)(x))->sin6_addr)) 658 #endif 659 if (dst->sa_family == AF_INET && 660 multidest(dst) && multidest(sc2->gif_pdst)) { 661 error = EADDRNOTAVAIL; 662 goto bad; 663 } 664 #ifdef INET6 665 if (dst->sa_family == AF_INET6 && 666 multidest6(dst) && multidest6(sc2->gif_pdst)) { 667 error = EADDRNOTAVAIL; 668 goto bad; 669 } 670 #endif 671 } 672 673 if (sc->gif_psrc) 674 free((caddr_t)sc->gif_psrc, M_IFADDR); 675 sa = (struct sockaddr *)malloc(src->sa_len, M_IFADDR, M_WAITOK); 676 bcopy((caddr_t)src, (caddr_t)sa, src->sa_len); 677 sc->gif_psrc = sa; 678 679 if (sc->gif_pdst) 680 free((caddr_t)sc->gif_pdst, M_IFADDR); 681 sa = (struct sockaddr *)malloc(dst->sa_len, M_IFADDR, M_WAITOK); 682 bcopy((caddr_t)dst, (caddr_t)sa, dst->sa_len); 683 sc->gif_pdst = sa; 684 685 ifp->if_flags |= IFF_RUNNING; 686 s = splimp(); 687 if_up(ifp); /* mark interface UP and send up RTM_IFINFO */ 688 splx(s); 689 690 error = 0; 691 break; 692 693 #ifdef SIOCDIFPHYADDR 694 case SIOCDIFPHYADDR: 695 if (sc->gif_psrc) { 696 free((caddr_t)sc->gif_psrc, M_IFADDR); 697 sc->gif_psrc = NULL; 698 } 699 if (sc->gif_pdst) { 700 free((caddr_t)sc->gif_pdst, M_IFADDR); 701 sc->gif_pdst = NULL; 702 } 703 /* change the IFF_{UP, RUNNING} flag as well? */ 704 break; 705 #endif 706 707 case SIOCGIFPSRCADDR: 708 #ifdef INET6 709 case SIOCGIFPSRCADDR_IN6: 710 #endif /* INET6 */ 711 if (sc->gif_psrc == NULL) { 712 error = EADDRNOTAVAIL; 713 goto bad; 714 } 715 src = sc->gif_psrc; 716 switch (cmd) { 717 #ifdef INET 718 case SIOCGIFPSRCADDR: 719 dst = &ifr->ifr_addr; 720 size = sizeof(ifr->ifr_addr); 721 break; 722 #endif /* INET */ 723 #ifdef INET6 724 case SIOCGIFPSRCADDR_IN6: 725 dst = (struct sockaddr *) 726 &(((struct in6_ifreq *)data)->ifr_addr); 727 size = sizeof(((struct in6_ifreq *)data)->ifr_addr); 728 break; 729 #endif /* INET6 */ 730 default: 731 error = EADDRNOTAVAIL; 732 goto bad; 733 } 734 if (src->sa_len > size) 735 return EINVAL; 736 bcopy((caddr_t)src, (caddr_t)dst, src->sa_len); 737 break; 738 739 case SIOCGIFPDSTADDR: 740 #ifdef INET6 741 case SIOCGIFPDSTADDR_IN6: 742 #endif /* INET6 */ 743 if (sc->gif_pdst == NULL) { 744 error = EADDRNOTAVAIL; 745 goto bad; 746 } 747 src = sc->gif_pdst; 748 switch (cmd) { 749 #ifdef INET 750 case SIOCGIFPDSTADDR: 751 dst = &ifr->ifr_addr; 752 size = sizeof(ifr->ifr_addr); 753 break; 754 #endif /* INET */ 755 #ifdef INET6 756 case SIOCGIFPDSTADDR_IN6: 757 dst = (struct sockaddr *) 758 &(((struct in6_ifreq *)data)->ifr_addr); 759 size = sizeof(((struct in6_ifreq *)data)->ifr_addr); 760 break; 761 #endif /* INET6 */ 762 default: 763 error = EADDRNOTAVAIL; 764 goto bad; 765 } 766 if (src->sa_len > size) 767 return EINVAL; 768 bcopy((caddr_t)src, (caddr_t)dst, src->sa_len); 769 break; 770 771 case SIOCGLIFPHYADDR: 772 if (sc->gif_psrc == NULL || sc->gif_pdst == NULL) { 773 error = EADDRNOTAVAIL; 774 goto bad; 775 } 776 777 /* copy src */ 778 src = sc->gif_psrc; 779 dst = (struct sockaddr *) 780 &(((struct if_laddrreq *)data)->addr); 781 size = sizeof(((struct if_laddrreq *)data)->addr); 782 if (src->sa_len > size) 783 return EINVAL; 784 bcopy((caddr_t)src, (caddr_t)dst, src->sa_len); 785 786 /* copy dst */ 787 src = sc->gif_pdst; 788 dst = (struct sockaddr *) 789 &(((struct if_laddrreq *)data)->dstaddr); 790 size = sizeof(((struct if_laddrreq *)data)->dstaddr); 791 if (src->sa_len > size) 792 return EINVAL; 793 bcopy((caddr_t)src, (caddr_t)dst, src->sa_len); 794 break; 795 796 case SIOCSIFFLAGS: 797 /* if_ioctl() takes care of it */ 798 break; 799 800 default: 801 error = EINVAL; 802 break; 803 } 804 bad: 805 return error; 806 } 807 808 void 809 gif_delete_tunnel(sc) 810 struct gif_softc *sc; 811 { 812 /* XXX: NetBSD protects this function with splsoftnet() */ 813 814 if (sc->gif_psrc) { 815 free((caddr_t)sc->gif_psrc, M_IFADDR); 816 sc->gif_psrc = NULL; 817 } 818 if (sc->gif_pdst) { 819 free((caddr_t)sc->gif_pdst, M_IFADDR); 820 sc->gif_pdst = NULL; 821 } 822 /* change the IFF_UP flag as well? */ 823 } 824