1 /* $FreeBSD$ */ 2 /* $KAME: if_gif.c,v 1.87 2001/10/19 08:50:27 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/sysctl.h> 46 #include <sys/syslog.h> 47 #include <sys/protosw.h> 48 #include <sys/conf.h> 49 #include <machine/cpu.h> 50 51 #include <net/if.h> 52 #include <net/if_types.h> 53 #include <net/netisr.h> 54 #include <net/route.h> 55 #include <net/bpf.h> 56 57 #include <netinet/in.h> 58 #include <netinet/in_systm.h> 59 #include <netinet/ip.h> 60 #ifdef INET 61 #include <netinet/in_var.h> 62 #include <netinet/in_gif.h> 63 #include <netinet/ip_var.h> 64 #endif /* INET */ 65 66 #ifdef INET6 67 #ifndef INET 68 #include <netinet/in.h> 69 #endif 70 #include <netinet6/in6_var.h> 71 #include <netinet/ip6.h> 72 #include <netinet6/ip6_var.h> 73 #include <netinet6/in6_gif.h> 74 #include <netinet6/ip6protosw.h> 75 #endif /* INET6 */ 76 77 #include <netinet/ip_encap.h> 78 #include <net/if_gif.h> 79 80 #include <net/net_osdep.h> 81 82 #define GIFNAME "gif" 83 84 static MALLOC_DEFINE(M_GIF, "gif", "Generic Tunnel Interface"); 85 static LIST_HEAD(, gif_softc) gif_softc_list; 86 87 void (*ng_gif_input_p)(struct ifnet *ifp, struct mbuf **mp, int af); 88 void (*ng_gif_input_orphan_p)(struct ifnet *ifp, struct mbuf *m, int af); 89 void (*ng_gif_attach_p)(struct ifnet *ifp); 90 void (*ng_gif_detach_p)(struct ifnet *ifp); 91 92 int gif_clone_create(struct if_clone *, int); 93 int gif_clone_destroy(struct ifnet *); 94 95 struct if_clone gif_cloner = IF_CLONE_INITIALIZER("gif", 96 gif_clone_create, gif_clone_destroy, IF_MAXUNIT); 97 98 static int gifmodevent(module_t, int, void *); 99 void gif_delete_tunnel(struct gif_softc *); 100 static int gif_encapcheck(const struct mbuf *, int, int, void *); 101 102 #ifdef INET 103 extern struct domain inetdomain; 104 struct protosw in_gif_protosw = 105 { SOCK_RAW, &inetdomain, 0/*IPPROTO_IPV[46]*/, PR_ATOMIC|PR_ADDR, 106 in_gif_input, (pr_output_t*)rip_output, 0, rip_ctloutput, 107 0, 108 0, 0, 0, 0, 109 &rip_usrreqs 110 }; 111 #endif 112 #ifdef INET6 113 extern struct domain 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 SYSCTL_DECL(_net_link); 124 SYSCTL_NODE(_net_link, IFT_GIF, gif, CTLFLAG_RW, 0, 125 "Generic Tunnel Interface"); 126 #ifndef MAX_GIF_NEST 127 /* 128 * This macro controls the default upper limitation on nesting of gif tunnels. 129 * Since, setting a large value to this macro with a careless configuration 130 * may introduce system crash, we don't allow any nestings by default. 131 * If you need to configure nested gif tunnels, you can define this macro 132 * in your kernel configuration file. However, if you do so, please be 133 * careful to configure the tunnels so that it won't make a loop. 134 */ 135 #define MAX_GIF_NEST 1 136 #endif 137 static int max_gif_nesting = MAX_GIF_NEST; 138 SYSCTL_INT(_net_link_gif, OID_AUTO, max_nesting, CTLFLAG_RW, 139 &max_gif_nesting, 0, "Max nested tunnels"); 140 141 /* 142 * By default, we disallow creation of multiple tunnels between the same 143 * pair of addresses. Some applications require this functionality so 144 * we allow control over this check here. 145 */ 146 #ifdef XBONEHACK 147 static int parallel_tunnels = 1; 148 #else 149 static int parallel_tunnels = 0; 150 #endif 151 SYSCTL_INT(_net_link_gif, OID_AUTO, parallel_tunnels, CTLFLAG_RW, 152 ¶llel_tunnels, 0, "Allow parallel tunnels?"); 153 154 int 155 gif_clone_create(ifc, unit) 156 struct if_clone *ifc; 157 int unit; 158 { 159 struct gif_softc *sc; 160 161 sc = malloc (sizeof(struct gif_softc), M_GIF, M_WAITOK); 162 bzero(sc, sizeof(struct gif_softc)); 163 164 sc->gif_if.if_softc = sc; 165 sc->gif_if.if_name = GIFNAME; 166 sc->gif_if.if_unit = unit; 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 if (ng_gif_attach_p != NULL) 205 (*ng_gif_attach_p)(&sc->gif_if); 206 LIST_INSERT_HEAD(&gif_softc_list, sc, gif_link); 207 return (0); 208 } 209 210 int 211 gif_clone_destroy(ifp) 212 struct ifnet *ifp; 213 { 214 int err; 215 struct gif_softc *sc = ifp->if_softc; 216 217 gif_delete_tunnel(sc); 218 LIST_REMOVE(sc, gif_link); 219 if (sc->encap_cookie4 != NULL) { 220 err = encap_detach(sc->encap_cookie4); 221 KASSERT(err == 0, ("Unexpected error detaching encap_cookie4")); 222 } 223 if (sc->encap_cookie6 != NULL) { 224 err = encap_detach(sc->encap_cookie6); 225 KASSERT(err == 0, ("Unexpected error detaching encap_cookie6")); 226 } 227 228 if (ng_gif_detach_p != NULL) 229 (*ng_gif_detach_p)(ifp); 230 bpfdetach(ifp); 231 if_detach(ifp); 232 233 free(sc, M_GIF); 234 return (0); 235 } 236 237 static int 238 gifmodevent(mod, type, data) 239 module_t mod; 240 int type; 241 void *data; 242 { 243 244 switch (type) { 245 case MOD_LOAD: 246 LIST_INIT(&gif_softc_list); 247 if_clone_attach(&gif_cloner); 248 249 #ifdef INET6 250 ip6_gif_hlim = GIF_HLIM; 251 #endif 252 253 break; 254 case MOD_UNLOAD: 255 if_clone_detach(&gif_cloner); 256 257 while (!LIST_EMPTY(&gif_softc_list)) 258 gif_clone_destroy(&LIST_FIRST(&gif_softc_list)->gif_if); 259 260 #ifdef INET6 261 ip6_gif_hlim = 0; 262 #endif 263 break; 264 } 265 return 0; 266 } 267 268 static moduledata_t gif_mod = { 269 "if_gif", 270 gifmodevent, 271 0 272 }; 273 274 DECLARE_MODULE(if_gif, gif_mod, SI_SUB_PSEUDO, SI_ORDER_ANY); 275 MODULE_VERSION(if_gif, 1); 276 277 static int 278 gif_encapcheck(m, off, proto, arg) 279 const struct mbuf *m; 280 int off; 281 int proto; 282 void *arg; 283 { 284 struct ip ip; 285 struct gif_softc *sc; 286 287 sc = (struct gif_softc *)arg; 288 if (sc == NULL) 289 return 0; 290 291 if ((sc->gif_if.if_flags & IFF_UP) == 0) 292 return 0; 293 294 /* no physical address */ 295 if (!sc->gif_psrc || !sc->gif_pdst) 296 return 0; 297 298 switch (proto) { 299 #ifdef INET 300 case IPPROTO_IPV4: 301 break; 302 #endif 303 #ifdef INET6 304 case IPPROTO_IPV6: 305 break; 306 #endif 307 default: 308 return 0; 309 } 310 311 m_copydata(m, 0, sizeof(ip), (caddr_t)&ip); 312 313 switch (ip.ip_v) { 314 #ifdef INET 315 case 4: 316 if (sc->gif_psrc->sa_family != AF_INET || 317 sc->gif_pdst->sa_family != AF_INET) 318 return 0; 319 return gif_encapcheck4(m, off, proto, arg); 320 #endif 321 #ifdef INET6 322 case 6: 323 if (sc->gif_psrc->sa_family != AF_INET6 || 324 sc->gif_pdst->sa_family != AF_INET6) 325 return 0; 326 return gif_encapcheck6(m, off, proto, arg); 327 #endif 328 default: 329 return 0; 330 } 331 } 332 333 int 334 gif_output(ifp, m, dst, rt) 335 struct ifnet *ifp; 336 struct mbuf *m; 337 struct sockaddr *dst; 338 struct rtentry *rt; /* added in net2 */ 339 { 340 struct gif_softc *sc = (struct gif_softc*)ifp; 341 int error = 0; 342 static int called = 0; /* XXX: MUTEX */ 343 344 /* 345 * gif may cause infinite recursion calls when misconfigured. 346 * We'll prevent this by introducing upper limit. 347 * XXX: this mechanism may introduce another problem about 348 * mutual exclusion of the variable CALLED, especially if we 349 * use kernel thread. 350 */ 351 if (++called > max_gif_nesting) { 352 log(LOG_NOTICE, 353 "gif_output: recursively called too many times(%d)\n", 354 called); 355 m_freem(m); 356 error = EIO; /* is there better errno? */ 357 goto end; 358 } 359 360 m->m_flags &= ~(M_BCAST|M_MCAST); 361 if (!(ifp->if_flags & IFF_UP) || 362 sc->gif_psrc == NULL || sc->gif_pdst == NULL) { 363 m_freem(m); 364 error = ENETDOWN; 365 goto end; 366 } 367 368 if (ifp->if_bpf) { 369 /* 370 * We need to prepend the address family as 371 * a four byte field. Cons up a dummy header 372 * to pacify bpf. This is safe because bpf 373 * will only read from the mbuf (i.e., it won't 374 * try to free it or keep a pointer a to it). 375 */ 376 struct mbuf m0; 377 u_int32_t af = dst->sa_family; 378 379 m0.m_next = m; 380 m0.m_len = 4; 381 m0.m_data = (char *)⁡ 382 383 bpf_mtap(ifp, &m0); 384 } 385 ifp->if_opackets++; 386 ifp->if_obytes += m->m_pkthdr.len; 387 388 /* inner AF-specific encapsulation */ 389 390 /* XXX should we check if our outer source is legal? */ 391 392 /* dispatch to output logic based on outer AF */ 393 switch (sc->gif_psrc->sa_family) { 394 #ifdef INET 395 case AF_INET: 396 error = in_gif_output(ifp, dst->sa_family, m, rt); 397 break; 398 #endif 399 #ifdef INET6 400 case AF_INET6: 401 error = in6_gif_output(ifp, dst->sa_family, m, rt); 402 break; 403 #endif 404 default: 405 m_freem(m); 406 error = ENETDOWN; 407 goto end; 408 } 409 410 end: 411 called = 0; /* reset recursion counter */ 412 if (error) 413 ifp->if_oerrors++; 414 return error; 415 } 416 417 void 418 gif_input(m, af, gifp) 419 struct mbuf *m; 420 int af; 421 struct ifnet *gifp; 422 { 423 int isr; 424 struct ifqueue *ifq = 0; 425 426 if (gifp == NULL) { 427 /* just in case */ 428 m_freem(m); 429 return; 430 } 431 432 m->m_pkthdr.rcvif = gifp; 433 434 if (gifp->if_bpf) { 435 /* 436 * We need to prepend the address family as 437 * a four byte field. Cons up a dummy header 438 * to pacify bpf. This is safe because bpf 439 * will only read from the mbuf (i.e., it won't 440 * try to free it or keep a pointer a to it). 441 */ 442 struct mbuf m0; 443 u_int32_t af1 = af; 444 445 m0.m_next = m; 446 m0.m_len = 4; 447 m0.m_data = (char *)&af1; 448 449 bpf_mtap(gifp, &m0); 450 } 451 452 if (ng_gif_input_p != NULL) { 453 (*ng_gif_input_p)(gifp, &m, af); 454 if (m == NULL) 455 return; 456 } 457 458 /* 459 * Put the packet to the network layer input queue according to the 460 * specified address family. 461 * Note: older versions of gif_input directly called network layer 462 * input functions, e.g. ip6_input, here. We changed the policy to 463 * prevent too many recursive calls of such input functions, which 464 * might cause kernel panic. But the change may introduce another 465 * problem; if the input queue is full, packets are discarded. 466 * The kernel stack overflow really happened, and we believed 467 * queue-full rarely occurs, so we changed the policy. 468 */ 469 switch (af) { 470 #ifdef INET 471 case AF_INET: 472 ifq = &ipintrq; 473 isr = NETISR_IP; 474 break; 475 #endif 476 #ifdef INET6 477 case AF_INET6: 478 ifq = &ip6intrq; 479 isr = NETISR_IPV6; 480 break; 481 #endif 482 default: 483 if (ng_gif_input_orphan_p != NULL) 484 (*ng_gif_input_orphan_p)(gifp, m, af); 485 else 486 m_freem(m); 487 return; 488 } 489 490 gifp->if_ipackets++; 491 gifp->if_ibytes += m->m_pkthdr.len; 492 (void) IF_HANDOFF(ifq, m, NULL); 493 /* we need schednetisr since the address family may change */ 494 schednetisr(isr); 495 496 return; 497 } 498 499 /* XXX how should we handle IPv6 scope on SIOC[GS]IFPHYADDR? */ 500 int 501 gif_ioctl(ifp, cmd, data) 502 struct ifnet *ifp; 503 u_long cmd; 504 caddr_t data; 505 { 506 struct gif_softc *sc = (struct gif_softc*)ifp; 507 struct ifreq *ifr = (struct ifreq*)data; 508 int error = 0, size; 509 struct sockaddr *dst, *src; 510 struct sockaddr *sa; 511 int s; 512 struct ifnet *ifp2; 513 struct gif_softc *sc2; 514 515 switch (cmd) { 516 case SIOCSIFADDR: 517 break; 518 519 case SIOCSIFDSTADDR: 520 break; 521 522 case SIOCADDMULTI: 523 case SIOCDELMULTI: 524 break; 525 526 #ifdef SIOCSIFMTU /* xxx */ 527 case SIOCGIFMTU: 528 break; 529 530 case SIOCSIFMTU: 531 { 532 u_long mtu; 533 mtu = ifr->ifr_mtu; 534 if (mtu < GIF_MTU_MIN || mtu > GIF_MTU_MAX) { 535 return (EINVAL); 536 } 537 ifp->if_mtu = mtu; 538 } 539 break; 540 #endif /* SIOCSIFMTU */ 541 542 case SIOCSIFPHYADDR: 543 #ifdef INET6 544 case SIOCSIFPHYADDR_IN6: 545 #endif /* INET6 */ 546 case SIOCSLIFPHYADDR: 547 switch (cmd) { 548 #ifdef INET 549 case SIOCSIFPHYADDR: 550 src = (struct sockaddr *) 551 &(((struct in_aliasreq *)data)->ifra_addr); 552 dst = (struct sockaddr *) 553 &(((struct in_aliasreq *)data)->ifra_dstaddr); 554 break; 555 #endif 556 #ifdef INET6 557 case SIOCSIFPHYADDR_IN6: 558 src = (struct sockaddr *) 559 &(((struct in6_aliasreq *)data)->ifra_addr); 560 dst = (struct sockaddr *) 561 &(((struct in6_aliasreq *)data)->ifra_dstaddr); 562 break; 563 #endif 564 case SIOCSLIFPHYADDR: 565 src = (struct sockaddr *) 566 &(((struct if_laddrreq *)data)->addr); 567 dst = (struct sockaddr *) 568 &(((struct if_laddrreq *)data)->dstaddr); 569 default: 570 error = EADDRNOTAVAIL; 571 goto bad; 572 } 573 574 /* sa_family must be equal */ 575 if (src->sa_family != dst->sa_family) 576 return EINVAL; 577 578 /* validate sa_len */ 579 switch (src->sa_family) { 580 #ifdef INET 581 case AF_INET: 582 if (src->sa_len != sizeof(struct sockaddr_in)) 583 return EINVAL; 584 break; 585 #endif 586 #ifdef INET6 587 case AF_INET6: 588 if (src->sa_len != sizeof(struct sockaddr_in6)) 589 return EINVAL; 590 break; 591 #endif 592 default: 593 return EAFNOSUPPORT; 594 } 595 switch (dst->sa_family) { 596 #ifdef INET 597 case AF_INET: 598 if (dst->sa_len != sizeof(struct sockaddr_in)) 599 return EINVAL; 600 break; 601 #endif 602 #ifdef INET6 603 case AF_INET6: 604 if (dst->sa_len != sizeof(struct sockaddr_in6)) 605 return EINVAL; 606 break; 607 #endif 608 default: 609 return EAFNOSUPPORT; 610 } 611 612 /* check sa_family looks sane for the cmd */ 613 switch (cmd) { 614 case SIOCSIFPHYADDR: 615 if (src->sa_family == AF_INET) 616 break; 617 return EAFNOSUPPORT; 618 #ifdef INET6 619 case SIOCSIFPHYADDR_IN6: 620 if (src->sa_family == AF_INET6) 621 break; 622 return EAFNOSUPPORT; 623 #endif /* INET6 */ 624 case SIOCSLIFPHYADDR: 625 /* checks done in the above */ 626 break; 627 } 628 629 TAILQ_FOREACH(ifp2, &ifnet, if_link) { 630 if (strcmp(ifp2->if_name, GIFNAME) != 0) 631 continue; 632 sc2 = ifp2->if_softc; 633 if (sc2 == sc) 634 continue; 635 if (!sc2->gif_pdst || !sc2->gif_psrc) 636 continue; 637 if (sc2->gif_pdst->sa_family != dst->sa_family || 638 sc2->gif_pdst->sa_len != dst->sa_len || 639 sc2->gif_psrc->sa_family != src->sa_family || 640 sc2->gif_psrc->sa_len != src->sa_len) 641 continue; 642 643 /* 644 * Disallow parallel tunnels unless instructed 645 * otherwise. 646 */ 647 if (!parallel_tunnels && 648 bcmp(sc2->gif_pdst, dst, dst->sa_len) == 0 && 649 bcmp(sc2->gif_psrc, src, src->sa_len) == 0) { 650 error = EADDRNOTAVAIL; 651 goto bad; 652 } 653 654 /* can't configure multiple multi-dest interfaces */ 655 #define multidest(x) \ 656 (((struct sockaddr_in *)(x))->sin_addr.s_addr == INADDR_ANY) 657 #ifdef INET6 658 #define multidest6(x) \ 659 (IN6_IS_ADDR_UNSPECIFIED(&((struct sockaddr_in6 *)(x))->sin6_addr)) 660 #endif 661 if (dst->sa_family == AF_INET && 662 multidest(dst) && multidest(sc2->gif_pdst)) { 663 error = EADDRNOTAVAIL; 664 goto bad; 665 } 666 #ifdef INET6 667 if (dst->sa_family == AF_INET6 && 668 multidest6(dst) && multidest6(sc2->gif_pdst)) { 669 error = EADDRNOTAVAIL; 670 goto bad; 671 } 672 #endif 673 } 674 675 if (sc->gif_psrc) 676 free((caddr_t)sc->gif_psrc, M_IFADDR); 677 sa = (struct sockaddr *)malloc(src->sa_len, M_IFADDR, M_WAITOK); 678 bcopy((caddr_t)src, (caddr_t)sa, src->sa_len); 679 sc->gif_psrc = sa; 680 681 if (sc->gif_pdst) 682 free((caddr_t)sc->gif_pdst, M_IFADDR); 683 sa = (struct sockaddr *)malloc(dst->sa_len, M_IFADDR, M_WAITOK); 684 bcopy((caddr_t)dst, (caddr_t)sa, dst->sa_len); 685 sc->gif_pdst = sa; 686 687 ifp->if_flags |= IFF_RUNNING; 688 s = splimp(); 689 if_up(ifp); /* mark interface UP and send up RTM_IFINFO */ 690 splx(s); 691 692 error = 0; 693 break; 694 695 #ifdef SIOCDIFPHYADDR 696 case SIOCDIFPHYADDR: 697 if (sc->gif_psrc) { 698 free((caddr_t)sc->gif_psrc, M_IFADDR); 699 sc->gif_psrc = NULL; 700 } 701 if (sc->gif_pdst) { 702 free((caddr_t)sc->gif_pdst, M_IFADDR); 703 sc->gif_pdst = NULL; 704 } 705 /* change the IFF_{UP, RUNNING} flag as well? */ 706 break; 707 #endif 708 709 case SIOCGIFPSRCADDR: 710 #ifdef INET6 711 case SIOCGIFPSRCADDR_IN6: 712 #endif /* INET6 */ 713 if (sc->gif_psrc == NULL) { 714 error = EADDRNOTAVAIL; 715 goto bad; 716 } 717 src = sc->gif_psrc; 718 switch (cmd) { 719 #ifdef INET 720 case SIOCGIFPSRCADDR: 721 dst = &ifr->ifr_addr; 722 size = sizeof(ifr->ifr_addr); 723 break; 724 #endif /* INET */ 725 #ifdef INET6 726 case SIOCGIFPSRCADDR_IN6: 727 dst = (struct sockaddr *) 728 &(((struct in6_ifreq *)data)->ifr_addr); 729 size = sizeof(((struct in6_ifreq *)data)->ifr_addr); 730 break; 731 #endif /* INET6 */ 732 default: 733 error = EADDRNOTAVAIL; 734 goto bad; 735 } 736 if (src->sa_len > size) 737 return EINVAL; 738 bcopy((caddr_t)src, (caddr_t)dst, src->sa_len); 739 break; 740 741 case SIOCGIFPDSTADDR: 742 #ifdef INET6 743 case SIOCGIFPDSTADDR_IN6: 744 #endif /* INET6 */ 745 if (sc->gif_pdst == NULL) { 746 error = EADDRNOTAVAIL; 747 goto bad; 748 } 749 src = sc->gif_pdst; 750 switch (cmd) { 751 #ifdef INET 752 case SIOCGIFPDSTADDR: 753 dst = &ifr->ifr_addr; 754 size = sizeof(ifr->ifr_addr); 755 break; 756 #endif /* INET */ 757 #ifdef INET6 758 case SIOCGIFPDSTADDR_IN6: 759 dst = (struct sockaddr *) 760 &(((struct in6_ifreq *)data)->ifr_addr); 761 size = sizeof(((struct in6_ifreq *)data)->ifr_addr); 762 break; 763 #endif /* INET6 */ 764 default: 765 error = EADDRNOTAVAIL; 766 goto bad; 767 } 768 if (src->sa_len > size) 769 return EINVAL; 770 bcopy((caddr_t)src, (caddr_t)dst, src->sa_len); 771 break; 772 773 case SIOCGLIFPHYADDR: 774 if (sc->gif_psrc == NULL || sc->gif_pdst == NULL) { 775 error = EADDRNOTAVAIL; 776 goto bad; 777 } 778 779 /* copy src */ 780 src = sc->gif_psrc; 781 dst = (struct sockaddr *) 782 &(((struct if_laddrreq *)data)->addr); 783 size = sizeof(((struct if_laddrreq *)data)->addr); 784 if (src->sa_len > size) 785 return EINVAL; 786 bcopy((caddr_t)src, (caddr_t)dst, src->sa_len); 787 788 /* copy dst */ 789 src = sc->gif_pdst; 790 dst = (struct sockaddr *) 791 &(((struct if_laddrreq *)data)->dstaddr); 792 size = sizeof(((struct if_laddrreq *)data)->dstaddr); 793 if (src->sa_len > size) 794 return EINVAL; 795 bcopy((caddr_t)src, (caddr_t)dst, src->sa_len); 796 break; 797 798 case SIOCSIFFLAGS: 799 /* if_ioctl() takes care of it */ 800 break; 801 802 default: 803 error = EINVAL; 804 break; 805 } 806 bad: 807 return error; 808 } 809 810 void 811 gif_delete_tunnel(sc) 812 struct gif_softc *sc; 813 { 814 /* XXX: NetBSD protects this function with splsoftnet() */ 815 816 if (sc->gif_psrc) { 817 free((caddr_t)sc->gif_psrc, M_IFADDR); 818 sc->gif_psrc = NULL; 819 } 820 if (sc->gif_pdst) { 821 free((caddr_t)sc->gif_pdst, M_IFADDR); 822 sc->gif_pdst = NULL; 823 } 824 /* change the IFF_UP flag as well? */ 825 } 826