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 #include <netinet/ipprotosw.h> 66 #endif /* INET */ 67 68 #ifdef INET6 69 #ifndef INET 70 #include <netinet/in.h> 71 #endif 72 #include <netinet6/in6_var.h> 73 #include <netinet/ip6.h> 74 #include <netinet6/ip6_var.h> 75 #include <netinet6/in6_gif.h> 76 #include <netinet6/ip6protosw.h> 77 #endif /* INET6 */ 78 79 #include <netinet/ip_encap.h> 80 #include <net/if_gif.h> 81 82 #include <net/net_osdep.h> 83 84 #define GIFNAME "gif" 85 #define GIFDEV "if_gif" 86 #define GIF_MAXUNIT 0x7fff /* ifp->if_unit is only 15 bits */ 87 88 static MALLOC_DEFINE(M_GIF, "gif", "Generic Tunnel Interface"); 89 static struct rman gifunits[1]; 90 TAILQ_HEAD(gifhead, gif_softc) gifs = TAILQ_HEAD_INITIALIZER(gifs); 91 92 int gif_clone_create __P((struct if_clone *, int *)); 93 void gif_clone_destroy __P((struct ifnet *)); 94 95 struct if_clone gif_cloner = 96 IF_CLONE_INITIALIZER("gif", gif_clone_create, gif_clone_destroy); 97 98 static int gifmodevent __P((module_t, int, void *)); 99 void gif_delete_tunnel __P((struct gif_softc *)); 100 static int gif_encapcheck __P((const struct mbuf *, int, int, void *)); 101 102 #ifdef INET 103 extern struct domain inetdomain; 104 struct ipprotosw in_gif_protosw = 105 { SOCK_RAW, &inetdomain, 0/*IPPROTO_IPV[46]*/, PR_ATOMIC|PR_ADDR, 106 in_gif_input, rip_output, 0, rip_ctloutput, 107 0, 108 0, 0, 0, 0, 109 &rip_usrreqs 110 }; 111 #endif 112 #ifdef INET6 113 extern struct domain6 inet6domain; 114 struct ip6protosw in6_gif_protosw = 115 { SOCK_RAW, &inet6domain, 0/*IPPROTO_IPV[46]*/, PR_ATOMIC|PR_ADDR, 116 in6_gif_input, rip6_output, 0, rip6_ctloutput, 117 0, 118 0, 0, 0, 0, 119 &rip6_usrreqs 120 }; 121 #endif 122 123 #ifndef MAX_GIF_NEST 124 /* 125 * This macro controls the upper limitation on nesting of gif tunnels. 126 * Since, setting a large value to this macro with a careless configuration 127 * may introduce system crash, we don't allow any nestings by default. 128 * If you need to configure nested gif tunnels, you can define this macro 129 * in your kernel configuration file. However, if you do so, please be 130 * careful to configure the tunnels so that it won't make a loop. 131 */ 132 #define MAX_GIF_NEST 1 133 #endif 134 static int max_gif_nesting = MAX_GIF_NEST; 135 136 int 137 gif_clone_create(ifc, unit) 138 struct if_clone *ifc; 139 int *unit; 140 { 141 struct resource *r; 142 struct gif_softc *sc; 143 144 if (*unit > GIF_MAXUNIT) 145 return (ENXIO); 146 147 if (*unit < 0) { 148 r = rman_reserve_resource(gifunits, 0, GIF_MAXUNIT, 1, 149 RF_ALLOCATED | RF_ACTIVE, NULL); 150 if (r == NULL) 151 return (ENOSPC); 152 *unit = rman_get_start(r); 153 } else { 154 r = rman_reserve_resource(gifunits, *unit, *unit, 1, 155 RF_ALLOCATED | RF_ACTIVE, NULL); 156 if (r == NULL) 157 return (EEXIST); 158 } 159 160 sc = malloc (sizeof(struct gif_softc), M_GIF, M_WAITOK); 161 bzero(sc, sizeof(struct gif_softc)); 162 163 sc->gif_if.if_softc = sc; 164 sc->gif_if.if_name = GIFNAME; 165 sc->gif_if.if_unit = *unit; 166 sc->r_unit = r; 167 168 sc->encap_cookie4 = sc->encap_cookie6 = NULL; 169 #ifdef INET 170 sc->encap_cookie4 = encap_attach_func(AF_INET, -1, 171 gif_encapcheck, (struct protosw*)&in_gif_protosw, sc); 172 if (sc->encap_cookie4 == NULL) { 173 printf("%s: unable to attach encap4\n", if_name(&sc->gif_if)); 174 free(sc, M_GIF); 175 return (EIO); /* XXX */ 176 } 177 #endif 178 #ifdef INET6 179 sc->encap_cookie6 = encap_attach_func(AF_INET6, -1, 180 gif_encapcheck, (struct protosw *)&in6_gif_protosw, sc); 181 if (sc->encap_cookie6 == NULL) { 182 if (sc->encap_cookie4) { 183 encap_detach(sc->encap_cookie4); 184 sc->encap_cookie4 = NULL; 185 } 186 printf("%s: unable to attach encap6\n", if_name(&sc->gif_if)); 187 free(sc, M_GIF); 188 return (EIO); /* XXX */ 189 } 190 #endif 191 192 sc->gif_if.if_mtu = GIF_MTU; 193 sc->gif_if.if_flags = IFF_POINTOPOINT | IFF_MULTICAST; 194 #if 0 195 /* turn off ingress filter */ 196 sc->gif_if.if_flags |= IFF_LINK2; 197 #endif 198 sc->gif_if.if_ioctl = gif_ioctl; 199 sc->gif_if.if_output = gif_output; 200 sc->gif_if.if_type = IFT_GIF; 201 sc->gif_if.if_snd.ifq_maxlen = IFQ_MAXLEN; 202 if_attach(&sc->gif_if); 203 bpfattach(&sc->gif_if, DLT_NULL, sizeof(u_int)); 204 TAILQ_INSERT_TAIL(&gifs, sc, gif_link); 205 return (0); 206 } 207 208 void 209 gif_clone_destroy(ifp) 210 struct ifnet *ifp; 211 { 212 int err; 213 struct gif_softc *sc = ifp->if_softc; 214 215 gif_delete_tunnel(sc); 216 TAILQ_REMOVE(&gifs, sc, gif_link); 217 if (sc->encap_cookie4 != NULL) { 218 err = encap_detach(sc->encap_cookie4); 219 KASSERT(err == 0, ("Unexpected error detaching encap_cookie4")); 220 } 221 if (sc->encap_cookie6 != NULL) { 222 err = encap_detach(sc->encap_cookie6); 223 KASSERT(err == 0, ("Unexpected error detaching encap_cookie6")); 224 } 225 226 bpfdetach(ifp); 227 if_detach(ifp); 228 229 err = rman_release_resource(sc->r_unit); 230 KASSERT(err == 0, ("Unexpected error freeing resource")); 231 232 free(sc, M_GIF); 233 } 234 235 static int 236 gifmodevent(mod, type, data) 237 module_t mod; 238 int type; 239 void *data; 240 { 241 int err; 242 243 switch (type) { 244 case MOD_LOAD: 245 gifunits->rm_type = RMAN_ARRAY; 246 gifunits->rm_descr = "configurable if_gif units"; 247 err = rman_init(gifunits); 248 if (err != 0) 249 return (err); 250 err = rman_manage_region(gifunits, 0, GIF_MAXUNIT); 251 if (err != 0) { 252 printf("%s: gifunits: rman_manage_region: Failed %d\n", 253 GIFNAME, err); 254 rman_fini(gifunits); 255 return (err); 256 } 257 if_clone_attach(&gif_cloner); 258 259 #ifdef INET6 260 ip6_gif_hlim = GIF_HLIM; 261 #endif 262 263 break; 264 case MOD_UNLOAD: 265 if_clone_detach(&gif_cloner); 266 267 while (!TAILQ_EMPTY(&gifs)) 268 gif_clone_destroy(&TAILQ_FIRST(&gifs)->gif_if); 269 270 err = rman_fini(gifunits); 271 if (err != 0) 272 return (err); 273 #ifdef INET6 274 ip6_gif_hlim = 0; 275 #endif 276 break; 277 } 278 return 0; 279 } 280 281 static moduledata_t gif_mod = { 282 "if_gif", 283 gifmodevent, 284 0 285 }; 286 287 DECLARE_MODULE(if_gif, gif_mod, SI_SUB_PSEUDO, SI_ORDER_ANY); 288 289 static int 290 gif_encapcheck(m, off, proto, arg) 291 const struct mbuf *m; 292 int off; 293 int proto; 294 void *arg; 295 { 296 struct ip ip; 297 struct gif_softc *sc; 298 299 sc = (struct gif_softc *)arg; 300 if (sc == NULL) 301 return 0; 302 303 if ((sc->gif_if.if_flags & IFF_UP) == 0) 304 return 0; 305 306 /* no physical address */ 307 if (!sc->gif_psrc || !sc->gif_pdst) 308 return 0; 309 310 switch (proto) { 311 #ifdef INET 312 case IPPROTO_IPV4: 313 break; 314 #endif 315 #ifdef INET6 316 case IPPROTO_IPV6: 317 break; 318 #endif 319 default: 320 return 0; 321 } 322 323 /* LINTED const cast */ 324 m_copydata((struct mbuf *)m, 0, sizeof(ip), (caddr_t)&ip); 325 326 switch (ip.ip_v) { 327 #ifdef INET 328 case 4: 329 if (sc->gif_psrc->sa_family != AF_INET || 330 sc->gif_pdst->sa_family != AF_INET) 331 return 0; 332 return gif_encapcheck4(m, off, proto, arg); 333 #endif 334 #ifdef INET6 335 case 6: 336 if (sc->gif_psrc->sa_family != AF_INET6 || 337 sc->gif_pdst->sa_family != AF_INET6) 338 return 0; 339 return gif_encapcheck6(m, off, proto, arg); 340 #endif 341 default: 342 return 0; 343 } 344 } 345 346 int 347 gif_output(ifp, m, dst, rt) 348 struct ifnet *ifp; 349 struct mbuf *m; 350 struct sockaddr *dst; 351 struct rtentry *rt; /* added in net2 */ 352 { 353 struct gif_softc *sc = (struct gif_softc*)ifp; 354 int error = 0; 355 static int called = 0; /* XXX: MUTEX */ 356 357 /* 358 * gif may cause infinite recursion calls when misconfigured. 359 * We'll prevent this by introducing upper limit. 360 * XXX: this mechanism may introduce another problem about 361 * mutual exclusion of the variable CALLED, especially if we 362 * use kernel thread. 363 */ 364 if (++called > max_gif_nesting) { 365 log(LOG_NOTICE, 366 "gif_output: recursively called too many times(%d)\n", 367 called); 368 m_freem(m); 369 error = EIO; /* is there better errno? */ 370 goto end; 371 } 372 373 m->m_flags &= ~(M_BCAST|M_MCAST); 374 if (!(ifp->if_flags & IFF_UP) || 375 sc->gif_psrc == NULL || sc->gif_pdst == NULL) { 376 m_freem(m); 377 error = ENETDOWN; 378 goto end; 379 } 380 381 if (ifp->if_bpf) { 382 /* 383 * We need to prepend the address family as 384 * a four byte field. Cons up a dummy header 385 * to pacify bpf. This is safe because bpf 386 * will only read from the mbuf (i.e., it won't 387 * try to free it or keep a pointer a to it). 388 */ 389 struct mbuf m0; 390 u_int32_t af = dst->sa_family; 391 392 m0.m_next = m; 393 m0.m_len = 4; 394 m0.m_data = (char *)⁡ 395 396 bpf_mtap(ifp, &m0); 397 } 398 ifp->if_opackets++; 399 ifp->if_obytes += m->m_pkthdr.len; 400 401 /* inner AF-specific encapsulation */ 402 403 /* XXX should we check if our outer source is legal? */ 404 405 /* dispatch to output logic based on outer AF */ 406 switch (sc->gif_psrc->sa_family) { 407 #ifdef INET 408 case AF_INET: 409 error = in_gif_output(ifp, dst->sa_family, m, rt); 410 break; 411 #endif 412 #ifdef INET6 413 case AF_INET6: 414 error = in6_gif_output(ifp, dst->sa_family, m, rt); 415 break; 416 #endif 417 default: 418 m_freem(m); 419 error = ENETDOWN; 420 goto end; 421 } 422 423 end: 424 called = 0; /* reset recursion counter */ 425 if (error) 426 ifp->if_oerrors++; 427 return error; 428 } 429 430 void 431 gif_input(m, af, gifp) 432 struct mbuf *m; 433 int af; 434 struct ifnet *gifp; 435 { 436 int isr; 437 struct ifqueue *ifq = 0; 438 439 if (gifp == NULL) { 440 /* just in case */ 441 m_freem(m); 442 return; 443 } 444 445 m->m_pkthdr.rcvif = gifp; 446 447 if (gifp->if_bpf) { 448 /* 449 * We need to prepend the address family as 450 * a four byte field. Cons up a dummy header 451 * to pacify bpf. This is safe because bpf 452 * will only read from the mbuf (i.e., it won't 453 * try to free it or keep a pointer a to it). 454 */ 455 struct mbuf m0; 456 u_int32_t af1 = af; 457 458 m0.m_next = m; 459 m0.m_len = 4; 460 m0.m_data = (char *)&af1; 461 462 bpf_mtap(gifp, &m0); 463 } 464 465 /* 466 * Put the packet to the network layer input queue according to the 467 * specified address family. 468 * Note: older versions of gif_input directly called network layer 469 * input functions, e.g. ip6_input, here. We changed the policy to 470 * prevent too many recursive calls of such input functions, which 471 * might cause kernel panic. But the change may introduce another 472 * problem; if the input queue is full, packets are discarded. 473 * We believed it rarely occurs and changed the policy. If we find 474 * it occurs more times than we thought, we may change the policy 475 * again. 476 */ 477 switch (af) { 478 #ifdef INET 479 case AF_INET: 480 ifq = &ipintrq; 481 isr = NETISR_IP; 482 break; 483 #endif 484 #ifdef INET6 485 case AF_INET6: 486 ifq = &ip6intrq; 487 isr = NETISR_IPV6; 488 break; 489 #endif 490 default: 491 m_freem(m); 492 return; 493 } 494 495 gifp->if_ipackets++; 496 gifp->if_ibytes += m->m_pkthdr.len; 497 (void) IF_HANDOFF(ifq, m, NULL); 498 /* we need schednetisr since the address family may change */ 499 schednetisr(isr); 500 501 return; 502 } 503 504 /* XXX how should we handle IPv6 scope on SIOC[GS]IFPHYADDR? */ 505 int 506 gif_ioctl(ifp, cmd, data) 507 struct ifnet *ifp; 508 u_long cmd; 509 caddr_t data; 510 { 511 struct gif_softc *sc = (struct gif_softc*)ifp; 512 struct ifreq *ifr = (struct ifreq*)data; 513 int error = 0, size; 514 struct sockaddr *dst, *src; 515 struct sockaddr *sa; 516 int s; 517 struct ifnet *ifp2; 518 struct gif_softc *sc2; 519 520 switch (cmd) { 521 case SIOCSIFADDR: 522 break; 523 524 case SIOCSIFDSTADDR: 525 break; 526 527 case SIOCADDMULTI: 528 case SIOCDELMULTI: 529 break; 530 531 #ifdef SIOCSIFMTU /* xxx */ 532 case SIOCGIFMTU: 533 break; 534 535 case SIOCSIFMTU: 536 { 537 u_long mtu; 538 mtu = ifr->ifr_mtu; 539 if (mtu < GIF_MTU_MIN || mtu > GIF_MTU_MAX) { 540 return (EINVAL); 541 } 542 ifp->if_mtu = mtu; 543 } 544 break; 545 #endif /* SIOCSIFMTU */ 546 547 case SIOCSIFPHYADDR: 548 #ifdef INET6 549 case SIOCSIFPHYADDR_IN6: 550 #endif /* INET6 */ 551 case SIOCSLIFPHYADDR: 552 switch (cmd) { 553 #ifdef INET 554 case SIOCSIFPHYADDR: 555 src = (struct sockaddr *) 556 &(((struct in_aliasreq *)data)->ifra_addr); 557 dst = (struct sockaddr *) 558 &(((struct in_aliasreq *)data)->ifra_dstaddr); 559 break; 560 #endif 561 #ifdef INET6 562 case SIOCSIFPHYADDR_IN6: 563 src = (struct sockaddr *) 564 &(((struct in6_aliasreq *)data)->ifra_addr); 565 dst = (struct sockaddr *) 566 &(((struct in6_aliasreq *)data)->ifra_dstaddr); 567 break; 568 #endif 569 case SIOCSLIFPHYADDR: 570 src = (struct sockaddr *) 571 &(((struct if_laddrreq *)data)->addr); 572 dst = (struct sockaddr *) 573 &(((struct if_laddrreq *)data)->dstaddr); 574 } 575 576 /* sa_family must be equal */ 577 if (src->sa_family != dst->sa_family) 578 return EINVAL; 579 580 /* validate sa_len */ 581 switch (src->sa_family) { 582 #ifdef INET 583 case AF_INET: 584 if (src->sa_len != sizeof(struct sockaddr_in)) 585 return EINVAL; 586 break; 587 #endif 588 #ifdef INET6 589 case AF_INET6: 590 if (src->sa_len != sizeof(struct sockaddr_in6)) 591 return EINVAL; 592 break; 593 #endif 594 default: 595 return EAFNOSUPPORT; 596 } 597 switch (dst->sa_family) { 598 #ifdef INET 599 case AF_INET: 600 if (dst->sa_len != sizeof(struct sockaddr_in)) 601 return EINVAL; 602 break; 603 #endif 604 #ifdef INET6 605 case AF_INET6: 606 if (dst->sa_len != sizeof(struct sockaddr_in6)) 607 return EINVAL; 608 break; 609 #endif 610 default: 611 return EAFNOSUPPORT; 612 } 613 614 /* check sa_family looks sane for the cmd */ 615 switch (cmd) { 616 case SIOCSIFPHYADDR: 617 if (src->sa_family == AF_INET) 618 break; 619 return EAFNOSUPPORT; 620 #ifdef INET6 621 case SIOCSIFPHYADDR_IN6: 622 if (src->sa_family == AF_INET6) 623 break; 624 return EAFNOSUPPORT; 625 #endif /* INET6 */ 626 case SIOCSLIFPHYADDR: 627 /* checks done in the above */ 628 break; 629 } 630 631 TAILQ_FOREACH(ifp2, &ifnet, if_link) { 632 if (strcmp(ifp2->if_name, GIFNAME) != 0) 633 continue; 634 sc2 = ifp2->if_softc; 635 if (sc2 == sc) 636 continue; 637 if (!sc2->gif_pdst || !sc2->gif_psrc) 638 continue; 639 if (sc2->gif_pdst->sa_family != dst->sa_family || 640 sc2->gif_pdst->sa_len != dst->sa_len || 641 sc2->gif_psrc->sa_family != src->sa_family || 642 sc2->gif_psrc->sa_len != src->sa_len) 643 continue; 644 #ifndef XBONEHACK 645 /* can't configure same pair of address onto two gifs */ 646 if (bcmp(sc2->gif_pdst, dst, dst->sa_len) == 0 && 647 bcmp(sc2->gif_psrc, src, src->sa_len) == 0) { 648 error = EADDRNOTAVAIL; 649 goto bad; 650 } 651 #endif 652 653 /* can't configure multiple multi-dest interfaces */ 654 #define multidest(x) \ 655 (((struct sockaddr_in *)(x))->sin_addr.s_addr == INADDR_ANY) 656 #ifdef INET6 657 #define multidest6(x) \ 658 (IN6_IS_ADDR_UNSPECIFIED(&((struct sockaddr_in6 *)(x))->sin6_addr)) 659 #endif 660 if (dst->sa_family == AF_INET && 661 multidest(dst) && multidest(sc2->gif_pdst)) { 662 error = EADDRNOTAVAIL; 663 goto bad; 664 } 665 #ifdef INET6 666 if (dst->sa_family == AF_INET6 && 667 multidest6(dst) && multidest6(sc2->gif_pdst)) { 668 error = EADDRNOTAVAIL; 669 goto bad; 670 } 671 #endif 672 } 673 674 if (sc->gif_psrc) 675 free((caddr_t)sc->gif_psrc, M_IFADDR); 676 sa = (struct sockaddr *)malloc(src->sa_len, M_IFADDR, M_WAITOK); 677 bcopy((caddr_t)src, (caddr_t)sa, src->sa_len); 678 sc->gif_psrc = sa; 679 680 if (sc->gif_pdst) 681 free((caddr_t)sc->gif_pdst, M_IFADDR); 682 sa = (struct sockaddr *)malloc(dst->sa_len, M_IFADDR, M_WAITOK); 683 bcopy((caddr_t)dst, (caddr_t)sa, dst->sa_len); 684 sc->gif_pdst = sa; 685 686 ifp->if_flags |= IFF_RUNNING; 687 s = splimp(); 688 if_up(ifp); /* mark interface UP and send up RTM_IFINFO */ 689 splx(s); 690 691 error = 0; 692 break; 693 694 #ifdef SIOCDIFPHYADDR 695 case SIOCDIFPHYADDR: 696 if (sc->gif_psrc) { 697 free((caddr_t)sc->gif_psrc, M_IFADDR); 698 sc->gif_psrc = NULL; 699 } 700 if (sc->gif_pdst) { 701 free((caddr_t)sc->gif_pdst, M_IFADDR); 702 sc->gif_pdst = NULL; 703 } 704 /* change the IFF_{UP, RUNNING} flag as well? */ 705 break; 706 #endif 707 708 case SIOCGIFPSRCADDR: 709 #ifdef INET6 710 case SIOCGIFPSRCADDR_IN6: 711 #endif /* INET6 */ 712 if (sc->gif_psrc == NULL) { 713 error = EADDRNOTAVAIL; 714 goto bad; 715 } 716 src = sc->gif_psrc; 717 switch (cmd) { 718 #ifdef INET 719 case SIOCGIFPSRCADDR: 720 dst = &ifr->ifr_addr; 721 size = sizeof(ifr->ifr_addr); 722 break; 723 #endif /* INET */ 724 #ifdef INET6 725 case SIOCGIFPSRCADDR_IN6: 726 dst = (struct sockaddr *) 727 &(((struct in6_ifreq *)data)->ifr_addr); 728 size = sizeof(((struct in6_ifreq *)data)->ifr_addr); 729 break; 730 #endif /* INET6 */ 731 default: 732 error = EADDRNOTAVAIL; 733 goto bad; 734 } 735 if (src->sa_len > size) 736 return EINVAL; 737 bcopy((caddr_t)src, (caddr_t)dst, src->sa_len); 738 break; 739 740 case SIOCGIFPDSTADDR: 741 #ifdef INET6 742 case SIOCGIFPDSTADDR_IN6: 743 #endif /* INET6 */ 744 if (sc->gif_pdst == NULL) { 745 error = EADDRNOTAVAIL; 746 goto bad; 747 } 748 src = sc->gif_pdst; 749 switch (cmd) { 750 #ifdef INET 751 case SIOCGIFPDSTADDR: 752 dst = &ifr->ifr_addr; 753 size = sizeof(ifr->ifr_addr); 754 break; 755 #endif /* INET */ 756 #ifdef INET6 757 case SIOCGIFPDSTADDR_IN6: 758 dst = (struct sockaddr *) 759 &(((struct in6_ifreq *)data)->ifr_addr); 760 size = sizeof(((struct in6_ifreq *)data)->ifr_addr); 761 break; 762 #endif /* INET6 */ 763 default: 764 error = EADDRNOTAVAIL; 765 goto bad; 766 } 767 if (src->sa_len > size) 768 return EINVAL; 769 bcopy((caddr_t)src, (caddr_t)dst, src->sa_len); 770 break; 771 772 case SIOCGLIFPHYADDR: 773 if (sc->gif_psrc == NULL || sc->gif_pdst == NULL) { 774 error = EADDRNOTAVAIL; 775 goto bad; 776 } 777 778 /* copy src */ 779 src = sc->gif_psrc; 780 dst = (struct sockaddr *) 781 &(((struct if_laddrreq *)data)->addr); 782 size = sizeof(((struct if_laddrreq *)data)->addr); 783 if (src->sa_len > size) 784 return EINVAL; 785 bcopy((caddr_t)src, (caddr_t)dst, src->sa_len); 786 787 /* copy dst */ 788 src = sc->gif_pdst; 789 dst = (struct sockaddr *) 790 &(((struct if_laddrreq *)data)->dstaddr); 791 size = sizeof(((struct if_laddrreq *)data)->dstaddr); 792 if (src->sa_len > size) 793 return EINVAL; 794 bcopy((caddr_t)src, (caddr_t)dst, src->sa_len); 795 break; 796 797 case SIOCSIFFLAGS: 798 /* if_ioctl() takes care of it */ 799 break; 800 801 default: 802 error = EINVAL; 803 break; 804 } 805 bad: 806 return error; 807 } 808 809 void 810 gif_delete_tunnel(sc) 811 struct gif_softc *sc; 812 { 813 /* XXX: NetBSD protects this function with splsoftnet() */ 814 815 if (sc->gif_psrc) { 816 free((caddr_t)sc->gif_psrc, M_IFADDR); 817 sc->gif_psrc = NULL; 818 } 819 if (sc->gif_pdst) { 820 free((caddr_t)sc->gif_pdst, M_IFADDR); 821 sc->gif_pdst = NULL; 822 } 823 /* change the IFF_UP flag as well? */ 824 } 825