if_gif.c revision 103709
1/* $FreeBSD: head/sys/net/if_gif.c 103709 2002-09-20 18:21:46Z ume $ */ 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#include "opt_mac.h" 36 37#include <sys/param.h> 38#include <sys/systm.h> 39#include <sys/kernel.h> 40#include <sys/mac.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 <machine/cpu.h> 52 53#include <net/if.h> 54#include <net/if_types.h> 55#include <net/netisr.h> 56#include <net/route.h> 57#include <net/bpf.h> 58 59#include <netinet/in.h> 60#include <netinet/in_systm.h> 61#include <netinet/ip.h> 62#ifdef INET 63#include <netinet/in_var.h> 64#include <netinet/in_gif.h> 65#include <netinet/ip_var.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 86static MALLOC_DEFINE(M_GIF, "gif", "Generic Tunnel Interface"); 87static LIST_HEAD(, gif_softc) gif_softc_list; 88 89void (*ng_gif_input_p)(struct ifnet *ifp, struct mbuf **mp, int af); 90void (*ng_gif_input_orphan_p)(struct ifnet *ifp, struct mbuf *m, int af); 91void (*ng_gif_attach_p)(struct ifnet *ifp); 92void (*ng_gif_detach_p)(struct ifnet *ifp); 93 94int gif_clone_create(struct if_clone *, int); 95void gif_clone_destroy(struct ifnet *); 96 97struct if_clone gif_cloner = IF_CLONE_INITIALIZER("gif", 98 gif_clone_create, gif_clone_destroy, 0, IF_MAXUNIT); 99 100static int gifmodevent(module_t, int, void *); 101void gif_delete_tunnel(struct gif_softc *); 102static int gif_encapcheck(const struct mbuf *, int, int, void *); 103 104#ifdef INET 105extern struct domain inetdomain; 106struct protosw in_gif_protosw = 107{ SOCK_RAW, &inetdomain, 0/*IPPROTO_IPV[46]*/, PR_ATOMIC|PR_ADDR, 108 in_gif_input, (pr_output_t*)rip_output, 0, rip_ctloutput, 109 0, 110 0, 0, 0, 0, 111 &rip_usrreqs 112}; 113#endif 114#ifdef INET6 115extern struct domain inet6domain; 116struct ip6protosw in6_gif_protosw = 117{ SOCK_RAW, &inet6domain, 0/*IPPROTO_IPV[46]*/, PR_ATOMIC|PR_ADDR, 118 in6_gif_input, rip6_output, 0, rip6_ctloutput, 119 0, 120 0, 0, 0, 0, 121 &rip6_usrreqs 122}; 123#endif 124 125SYSCTL_DECL(_net_link); 126SYSCTL_NODE(_net_link, IFT_GIF, gif, CTLFLAG_RW, 0, 127 "Generic Tunnel Interface"); 128#ifndef MAX_GIF_NEST 129/* 130 * This macro controls the default upper limitation on nesting of gif tunnels. 131 * Since, setting a large value to this macro with a careless configuration 132 * may introduce system crash, we don't allow any nestings by default. 133 * If you need to configure nested gif tunnels, you can define this macro 134 * in your kernel configuration file. However, if you do so, please be 135 * careful to configure the tunnels so that it won't make a loop. 136 */ 137#define MAX_GIF_NEST 1 138#endif 139static int max_gif_nesting = MAX_GIF_NEST; 140SYSCTL_INT(_net_link_gif, OID_AUTO, max_nesting, CTLFLAG_RW, 141 &max_gif_nesting, 0, "Max nested tunnels"); 142 143/* 144 * By default, we disallow creation of multiple tunnels between the same 145 * pair of addresses. Some applications require this functionality so 146 * we allow control over this check here. 147 */ 148#ifdef XBONEHACK 149static int parallel_tunnels = 1; 150#else 151static int parallel_tunnels = 0; 152#endif 153SYSCTL_INT(_net_link_gif, OID_AUTO, parallel_tunnels, CTLFLAG_RW, 154 ¶llel_tunnels, 0, "Allow parallel tunnels?"); 155 156int 157gif_clone_create(ifc, unit) 158 struct if_clone *ifc; 159 int unit; 160{ 161 struct gif_softc *sc; 162 163 sc = malloc (sizeof(struct gif_softc), M_GIF, M_WAITOK); 164 bzero(sc, sizeof(struct gif_softc)); 165 166 sc->gif_if.if_softc = sc; 167 sc->gif_if.if_name = GIFNAME; 168 sc->gif_if.if_unit = unit; 169 170 sc->encap_cookie4 = sc->encap_cookie6 = NULL; 171#ifdef INET 172 sc->encap_cookie4 = encap_attach_func(AF_INET, IPPROTO_IPV4, 173 gif_encapcheck, (struct protosw*)&in_gif_protosw, sc); 174 if (sc->encap_cookie4 == NULL) { 175 printf("%s: unable to attach encap4\n", if_name(&sc->gif_if)); 176 free(sc, M_GIF); 177 return (EIO); /* XXX */ 178 } 179#endif 180#ifdef INET6 181 sc->encap_cookie6 = encap_attach_func(AF_INET6, IPPROTO_IPV6, 182 gif_encapcheck, (struct protosw *)&in6_gif_protosw, sc); 183 if (sc->encap_cookie6 == NULL) { 184 if (sc->encap_cookie4) { 185 encap_detach(sc->encap_cookie4); 186 sc->encap_cookie4 = NULL; 187 } 188 printf("%s: unable to attach encap6\n", if_name(&sc->gif_if)); 189 free(sc, M_GIF); 190 return (EIO); /* XXX */ 191 } 192#endif 193 194 sc->gif_if.if_mtu = GIF_MTU; 195 sc->gif_if.if_flags = IFF_POINTOPOINT | IFF_MULTICAST; 196#if 0 197 /* turn off ingress filter */ 198 sc->gif_if.if_flags |= IFF_LINK2; 199#endif 200 sc->gif_if.if_ioctl = gif_ioctl; 201 sc->gif_if.if_output = gif_output; 202 sc->gif_if.if_type = IFT_GIF; 203 sc->gif_if.if_snd.ifq_maxlen = IFQ_MAXLEN; 204 if_attach(&sc->gif_if); 205 bpfattach(&sc->gif_if, DLT_NULL, sizeof(u_int)); 206 if (ng_gif_attach_p != NULL) 207 (*ng_gif_attach_p)(&sc->gif_if); 208 LIST_INSERT_HEAD(&gif_softc_list, sc, gif_link); 209 return (0); 210} 211 212void 213gif_clone_destroy(ifp) 214 struct ifnet *ifp; 215{ 216 int err; 217 struct gif_softc *sc = ifp->if_softc; 218 219 gif_delete_tunnel(sc); 220 LIST_REMOVE(sc, gif_link); 221 if (sc->encap_cookie4 != NULL) { 222 err = encap_detach(sc->encap_cookie4); 223 KASSERT(err == 0, ("Unexpected error detaching encap_cookie4")); 224 } 225 if (sc->encap_cookie6 != NULL) { 226 err = encap_detach(sc->encap_cookie6); 227 KASSERT(err == 0, ("Unexpected error detaching encap_cookie6")); 228 } 229 230 if (ng_gif_detach_p != NULL) 231 (*ng_gif_detach_p)(ifp); 232 bpfdetach(ifp); 233 if_detach(ifp); 234 235 free(sc, M_GIF); 236} 237 238static int 239gifmodevent(mod, type, data) 240 module_t mod; 241 int type; 242 void *data; 243{ 244 245 switch (type) { 246 case MOD_LOAD: 247 LIST_INIT(&gif_softc_list); 248 if_clone_attach(&gif_cloner); 249 250#ifdef INET6 251 ip6_gif_hlim = GIF_HLIM; 252#endif 253 254 break; 255 case MOD_UNLOAD: 256 if_clone_detach(&gif_cloner); 257 258 while (!LIST_EMPTY(&gif_softc_list)) 259 gif_clone_destroy(&LIST_FIRST(&gif_softc_list)->gif_if); 260 261#ifdef INET6 262 ip6_gif_hlim = 0; 263#endif 264 break; 265 } 266 return 0; 267} 268 269static moduledata_t gif_mod = { 270 "if_gif", 271 gifmodevent, 272 0 273}; 274 275DECLARE_MODULE(if_gif, gif_mod, SI_SUB_PSEUDO, SI_ORDER_ANY); 276MODULE_VERSION(if_gif, 1); 277 278static int 279gif_encapcheck(m, off, proto, arg) 280 const struct mbuf *m; 281 int off; 282 int proto; 283 void *arg; 284{ 285 struct ip ip; 286 struct gif_softc *sc; 287 288 sc = (struct gif_softc *)arg; 289 if (sc == NULL) 290 return 0; 291 292 if ((sc->gif_if.if_flags & IFF_UP) == 0) 293 return 0; 294 295 /* no physical address */ 296 if (!sc->gif_psrc || !sc->gif_pdst) 297 return 0; 298 299 switch (proto) { 300#ifdef INET 301 case IPPROTO_IPV4: 302 break; 303#endif 304#ifdef INET6 305 case IPPROTO_IPV6: 306 break; 307#endif 308 default: 309 return 0; 310 } 311 312 m_copydata(m, 0, sizeof(ip), (caddr_t)&ip); 313 314 switch (ip.ip_v) { 315#ifdef INET 316 case 4: 317 if (sc->gif_psrc->sa_family != AF_INET || 318 sc->gif_pdst->sa_family != AF_INET) 319 return 0; 320 return gif_encapcheck4(m, off, proto, arg); 321#endif 322#ifdef INET6 323 case 6: 324 if (sc->gif_psrc->sa_family != AF_INET6 || 325 sc->gif_pdst->sa_family != AF_INET6) 326 return 0; 327 return gif_encapcheck6(m, off, proto, arg); 328#endif 329 default: 330 return 0; 331 } 332} 333 334int 335gif_output(ifp, m, dst, rt) 336 struct ifnet *ifp; 337 struct mbuf *m; 338 struct sockaddr *dst; 339 struct rtentry *rt; /* added in net2 */ 340{ 341 struct gif_softc *sc = (struct gif_softc*)ifp; 342 int error = 0; 343 static int called = 0; /* XXX: MUTEX */ 344 345#ifdef MAC 346 error = mac_check_ifnet_transmit(ifp, m); 347 if (error) { 348 m_freem(m); 349 goto end; 350 } 351#endif 352 353 /* 354 * gif may cause infinite recursion calls when misconfigured. 355 * We'll prevent this by introducing upper limit. 356 * XXX: this mechanism may introduce another problem about 357 * mutual exclusion of the variable CALLED, especially if we 358 * use kernel thread. 359 */ 360 if (++called > max_gif_nesting) { 361 log(LOG_NOTICE, 362 "gif_output: recursively called too many times(%d)\n", 363 called); 364 m_freem(m); 365 error = EIO; /* is there better errno? */ 366 goto end; 367 } 368 369 m->m_flags &= ~(M_BCAST|M_MCAST); 370 if (!(ifp->if_flags & IFF_UP) || 371 sc->gif_psrc == NULL || sc->gif_pdst == NULL) { 372 m_freem(m); 373 error = ENETDOWN; 374 goto end; 375 } 376 377 if (ifp->if_bpf) { 378 /* 379 * We need to prepend the address family as 380 * a four byte field. Cons up a dummy header 381 * to pacify bpf. This is safe because bpf 382 * will only read from the mbuf (i.e., it won't 383 * try to free it or keep a pointer a to it). 384 */ 385 struct mbuf m0; 386 u_int32_t af = dst->sa_family; 387 388 m0.m_next = m; 389 m0.m_len = 4; 390 m0.m_data = (char *)⁡ 391 392 bpf_mtap(ifp, &m0); 393 } 394 ifp->if_opackets++; 395 ifp->if_obytes += m->m_pkthdr.len; 396 397 /* inner AF-specific encapsulation */ 398 399 /* XXX should we check if our outer source is legal? */ 400 401 /* dispatch to output logic based on outer AF */ 402 switch (sc->gif_psrc->sa_family) { 403#ifdef INET 404 case AF_INET: 405 error = in_gif_output(ifp, dst->sa_family, m, rt); 406 break; 407#endif 408#ifdef INET6 409 case AF_INET6: 410 error = in6_gif_output(ifp, dst->sa_family, m, rt); 411 break; 412#endif 413 default: 414 m_freem(m); 415 error = ENETDOWN; 416 goto end; 417 } 418 419 end: 420 called = 0; /* reset recursion counter */ 421 if (error) 422 ifp->if_oerrors++; 423 return error; 424} 425 426void 427gif_input(m, af, gifp) 428 struct mbuf *m; 429 int af; 430 struct ifnet *gifp; 431{ 432 int isr; 433 struct ifqueue *ifq = 0; 434 435 if (gifp == NULL) { 436 /* just in case */ 437 m_freem(m); 438 return; 439 } 440 441 m->m_pkthdr.rcvif = gifp; 442 443#ifdef MAC 444 mac_create_mbuf_from_ifnet(gifp, m); 445#endif 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 if (ng_gif_input_p != NULL) { 466 (*ng_gif_input_p)(gifp, &m, af); 467 if (m == NULL) 468 return; 469 } 470 471 /* 472 * Put the packet to the network layer input queue according to the 473 * specified address family. 474 * Note: older versions of gif_input directly called network layer 475 * input functions, e.g. ip6_input, here. We changed the policy to 476 * prevent too many recursive calls of such input functions, which 477 * might cause kernel panic. But the change may introduce another 478 * problem; if the input queue is full, packets are discarded. 479 * The kernel stack overflow really happened, and we believed 480 * queue-full rarely occurs, so we changed the policy. 481 */ 482 switch (af) { 483#ifdef INET 484 case AF_INET: 485 ifq = &ipintrq; 486 isr = NETISR_IP; 487 break; 488#endif 489#ifdef INET6 490 case AF_INET6: 491 ifq = &ip6intrq; 492 isr = NETISR_IPV6; 493 break; 494#endif 495 default: 496 if (ng_gif_input_orphan_p != NULL) 497 (*ng_gif_input_orphan_p)(gifp, m, af); 498 else 499 m_freem(m); 500 return; 501 } 502 503 gifp->if_ipackets++; 504 gifp->if_ibytes += m->m_pkthdr.len; 505 (void) IF_HANDOFF(ifq, m, NULL); 506 /* we need schednetisr since the address family may change */ 507 schednetisr(isr); 508 509 return; 510} 511 512/* XXX how should we handle IPv6 scope on SIOC[GS]IFPHYADDR? */ 513int 514gif_ioctl(ifp, cmd, data) 515 struct ifnet *ifp; 516 u_long cmd; 517 caddr_t data; 518{ 519 struct gif_softc *sc = (struct gif_softc*)ifp; 520 struct ifreq *ifr = (struct ifreq*)data; 521 int error = 0, size; 522 struct sockaddr *dst, *src; 523 struct sockaddr *sa; 524 struct ifnet *ifp2; 525 struct gif_softc *sc2; 526 527 switch (cmd) { 528 case SIOCSIFADDR: 529 break; 530 531 case SIOCSIFDSTADDR: 532 break; 533 534 case SIOCADDMULTI: 535 case SIOCDELMULTI: 536 break; 537 538#ifdef SIOCSIFMTU /* xxx */ 539 case SIOCGIFMTU: 540 break; 541 542 case SIOCSIFMTU: 543 { 544 u_long mtu; 545 mtu = ifr->ifr_mtu; 546 if (mtu < GIF_MTU_MIN || mtu > GIF_MTU_MAX) { 547 return (EINVAL); 548 } 549 ifp->if_mtu = mtu; 550 } 551 break; 552#endif /* SIOCSIFMTU */ 553 554 case SIOCSIFPHYADDR: 555#ifdef INET6 556 case SIOCSIFPHYADDR_IN6: 557#endif /* INET6 */ 558 case SIOCSLIFPHYADDR: 559 switch (cmd) { 560#ifdef INET 561 case SIOCSIFPHYADDR: 562 src = (struct sockaddr *) 563 &(((struct in_aliasreq *)data)->ifra_addr); 564 dst = (struct sockaddr *) 565 &(((struct in_aliasreq *)data)->ifra_dstaddr); 566 break; 567#endif 568#ifdef INET6 569 case SIOCSIFPHYADDR_IN6: 570 src = (struct sockaddr *) 571 &(((struct in6_aliasreq *)data)->ifra_addr); 572 dst = (struct sockaddr *) 573 &(((struct in6_aliasreq *)data)->ifra_dstaddr); 574 break; 575#endif 576 case SIOCSLIFPHYADDR: 577 src = (struct sockaddr *) 578 &(((struct if_laddrreq *)data)->addr); 579 dst = (struct sockaddr *) 580 &(((struct if_laddrreq *)data)->dstaddr); 581 default: 582 error = EADDRNOTAVAIL; 583 goto bad; 584 } 585 586 /* sa_family must be equal */ 587 if (src->sa_family != dst->sa_family) 588 return EINVAL; 589 590 /* validate sa_len */ 591 switch (src->sa_family) { 592#ifdef INET 593 case AF_INET: 594 if (src->sa_len != sizeof(struct sockaddr_in)) 595 return EINVAL; 596 break; 597#endif 598#ifdef INET6 599 case AF_INET6: 600 if (src->sa_len != sizeof(struct sockaddr_in6)) 601 return EINVAL; 602 break; 603#endif 604 default: 605 return EAFNOSUPPORT; 606 } 607 switch (dst->sa_family) { 608#ifdef INET 609 case AF_INET: 610 if (dst->sa_len != sizeof(struct sockaddr_in)) 611 return EINVAL; 612 break; 613#endif 614#ifdef INET6 615 case AF_INET6: 616 if (dst->sa_len != sizeof(struct sockaddr_in6)) 617 return EINVAL; 618 break; 619#endif 620 default: 621 return EAFNOSUPPORT; 622 } 623 624 /* check sa_family looks sane for the cmd */ 625 switch (cmd) { 626 case SIOCSIFPHYADDR: 627 if (src->sa_family == AF_INET) 628 break; 629 return EAFNOSUPPORT; 630#ifdef INET6 631 case SIOCSIFPHYADDR_IN6: 632 if (src->sa_family == AF_INET6) 633 break; 634 return EAFNOSUPPORT; 635#endif /* INET6 */ 636 case SIOCSLIFPHYADDR: 637 /* checks done in the above */ 638 break; 639 } 640 641 TAILQ_FOREACH(ifp2, &ifnet, if_link) { 642 if (strcmp(ifp2->if_name, GIFNAME) != 0) 643 continue; 644 sc2 = ifp2->if_softc; 645 if (sc2 == sc) 646 continue; 647 if (!sc2->gif_pdst || !sc2->gif_psrc) 648 continue; 649 if (sc2->gif_pdst->sa_family != dst->sa_family || 650 sc2->gif_pdst->sa_len != dst->sa_len || 651 sc2->gif_psrc->sa_family != src->sa_family || 652 sc2->gif_psrc->sa_len != src->sa_len) 653 continue; 654 655 /* 656 * Disallow parallel tunnels unless instructed 657 * otherwise. 658 */ 659 if (!parallel_tunnels && 660 bcmp(sc2->gif_pdst, dst, dst->sa_len) == 0 && 661 bcmp(sc2->gif_psrc, src, src->sa_len) == 0) { 662 error = EADDRNOTAVAIL; 663 goto bad; 664 } 665 666 /* can't configure multiple multi-dest interfaces */ 667#define multidest(x) \ 668 (((struct sockaddr_in *)(x))->sin_addr.s_addr == INADDR_ANY) 669#ifdef INET6 670#define multidest6(x) \ 671 (IN6_IS_ADDR_UNSPECIFIED(&((struct sockaddr_in6 *)(x))->sin6_addr)) 672#endif 673 if (dst->sa_family == AF_INET && 674 multidest(dst) && multidest(sc2->gif_pdst)) { 675 error = EADDRNOTAVAIL; 676 goto bad; 677 } 678#ifdef INET6 679 if (dst->sa_family == AF_INET6 && 680 multidest6(dst) && multidest6(sc2->gif_pdst)) { 681 error = EADDRNOTAVAIL; 682 goto bad; 683 } 684#endif 685 } 686 687 if (sc->gif_psrc) 688 free((caddr_t)sc->gif_psrc, M_IFADDR); 689 sa = (struct sockaddr *)malloc(src->sa_len, M_IFADDR, M_WAITOK); 690 bcopy((caddr_t)src, (caddr_t)sa, src->sa_len); 691 sc->gif_psrc = sa; 692 693 if (sc->gif_pdst) 694 free((caddr_t)sc->gif_pdst, M_IFADDR); 695 sa = (struct sockaddr *)malloc(dst->sa_len, M_IFADDR, M_WAITOK); 696 bcopy((caddr_t)dst, (caddr_t)sa, dst->sa_len); 697 sc->gif_pdst = sa; 698 699 ifp->if_flags |= IFF_RUNNING; 700 701 error = 0; 702 break; 703 704#ifdef SIOCDIFPHYADDR 705 case SIOCDIFPHYADDR: 706 if (sc->gif_psrc) { 707 free((caddr_t)sc->gif_psrc, M_IFADDR); 708 sc->gif_psrc = NULL; 709 } 710 if (sc->gif_pdst) { 711 free((caddr_t)sc->gif_pdst, M_IFADDR); 712 sc->gif_pdst = NULL; 713 } 714 /* change the IFF_{UP, RUNNING} flag as well? */ 715 break; 716#endif 717 718 case SIOCGIFPSRCADDR: 719#ifdef INET6 720 case SIOCGIFPSRCADDR_IN6: 721#endif /* INET6 */ 722 if (sc->gif_psrc == NULL) { 723 error = EADDRNOTAVAIL; 724 goto bad; 725 } 726 src = sc->gif_psrc; 727 switch (cmd) { 728#ifdef INET 729 case SIOCGIFPSRCADDR: 730 dst = &ifr->ifr_addr; 731 size = sizeof(ifr->ifr_addr); 732 break; 733#endif /* INET */ 734#ifdef INET6 735 case SIOCGIFPSRCADDR_IN6: 736 dst = (struct sockaddr *) 737 &(((struct in6_ifreq *)data)->ifr_addr); 738 size = sizeof(((struct in6_ifreq *)data)->ifr_addr); 739 break; 740#endif /* INET6 */ 741 default: 742 error = EADDRNOTAVAIL; 743 goto bad; 744 } 745 if (src->sa_len > size) 746 return EINVAL; 747 bcopy((caddr_t)src, (caddr_t)dst, src->sa_len); 748 break; 749 750 case SIOCGIFPDSTADDR: 751#ifdef INET6 752 case SIOCGIFPDSTADDR_IN6: 753#endif /* INET6 */ 754 if (sc->gif_pdst == NULL) { 755 error = EADDRNOTAVAIL; 756 goto bad; 757 } 758 src = sc->gif_pdst; 759 switch (cmd) { 760#ifdef INET 761 case SIOCGIFPDSTADDR: 762 dst = &ifr->ifr_addr; 763 size = sizeof(ifr->ifr_addr); 764 break; 765#endif /* INET */ 766#ifdef INET6 767 case SIOCGIFPDSTADDR_IN6: 768 dst = (struct sockaddr *) 769 &(((struct in6_ifreq *)data)->ifr_addr); 770 size = sizeof(((struct in6_ifreq *)data)->ifr_addr); 771 break; 772#endif /* INET6 */ 773 default: 774 error = EADDRNOTAVAIL; 775 goto bad; 776 } 777 if (src->sa_len > size) 778 return EINVAL; 779 bcopy((caddr_t)src, (caddr_t)dst, src->sa_len); 780 break; 781 782 case SIOCGLIFPHYADDR: 783 if (sc->gif_psrc == NULL || sc->gif_pdst == NULL) { 784 error = EADDRNOTAVAIL; 785 goto bad; 786 } 787 788 /* copy src */ 789 src = sc->gif_psrc; 790 dst = (struct sockaddr *) 791 &(((struct if_laddrreq *)data)->addr); 792 size = sizeof(((struct if_laddrreq *)data)->addr); 793 if (src->sa_len > size) 794 return EINVAL; 795 bcopy((caddr_t)src, (caddr_t)dst, src->sa_len); 796 797 /* copy dst */ 798 src = sc->gif_pdst; 799 dst = (struct sockaddr *) 800 &(((struct if_laddrreq *)data)->dstaddr); 801 size = sizeof(((struct if_laddrreq *)data)->dstaddr); 802 if (src->sa_len > size) 803 return EINVAL; 804 bcopy((caddr_t)src, (caddr_t)dst, src->sa_len); 805 break; 806 807 case SIOCSIFFLAGS: 808 /* if_ioctl() takes care of it */ 809 break; 810 811 default: 812 error = EINVAL; 813 break; 814 } 815 bad: 816 return error; 817} 818 819void 820gif_delete_tunnel(sc) 821 struct gif_softc *sc; 822{ 823 /* XXX: NetBSD protects this function with splsoftnet() */ 824 825 if (sc->gif_psrc) { 826 free((caddr_t)sc->gif_psrc, M_IFADDR); 827 sc->gif_psrc = NULL; 828 } 829 if (sc->gif_pdst) { 830 free((caddr_t)sc->gif_pdst, M_IFADDR); 831 sc->gif_pdst = NULL; 832 } 833 /* change the IFF_UP flag as well? */ 834} 835