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 void gif_clone_destroy(struct ifnet *); 94 95 struct if_clone gif_cloner = IF_CLONE_INITIALIZER("gif", 96 gif_clone_create, gif_clone_destroy, 0, 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 void 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 } 235 236 static int 237 gifmodevent(mod, type, data) 238 module_t mod; 239 int type; 240 void *data; 241 { 242 243 switch (type) { 244 case MOD_LOAD: 245 LIST_INIT(&gif_softc_list); 246 if_clone_attach(&gif_cloner); 247 248 #ifdef INET6 249 ip6_gif_hlim = GIF_HLIM; 250 #endif 251 252 break; 253 case MOD_UNLOAD: 254 if_clone_detach(&gif_cloner); 255 256 while (!LIST_EMPTY(&gif_softc_list)) 257 gif_clone_destroy(&LIST_FIRST(&gif_softc_list)->gif_if); 258 259 #ifdef INET6 260 ip6_gif_hlim = 0; 261 #endif 262 break; 263 } 264 return 0; 265 } 266 267 static moduledata_t gif_mod = { 268 "if_gif", 269 gifmodevent, 270 0 271 }; 272 273 DECLARE_MODULE(if_gif, gif_mod, SI_SUB_PSEUDO, SI_ORDER_ANY); 274 MODULE_VERSION(if_gif, 1); 275 276 static int 277 gif_encapcheck(m, off, proto, arg) 278 const struct mbuf *m; 279 int off; 280 int proto; 281 void *arg; 282 { 283 struct ip ip; 284 struct gif_softc *sc; 285 286 sc = (struct gif_softc *)arg; 287 if (sc == NULL) 288 return 0; 289 290 if ((sc->gif_if.if_flags & IFF_UP) == 0) 291 return 0; 292 293 /* no physical address */ 294 if (!sc->gif_psrc || !sc->gif_pdst) 295 return 0; 296 297 switch (proto) { 298 #ifdef INET 299 case IPPROTO_IPV4: 300 break; 301 #endif 302 #ifdef INET6 303 case IPPROTO_IPV6: 304 break; 305 #endif 306 default: 307 return 0; 308 } 309 310 m_copydata(m, 0, sizeof(ip), (caddr_t)&ip); 311 312 switch (ip.ip_v) { 313 #ifdef INET 314 case 4: 315 if (sc->gif_psrc->sa_family != AF_INET || 316 sc->gif_pdst->sa_family != AF_INET) 317 return 0; 318 return gif_encapcheck4(m, off, proto, arg); 319 #endif 320 #ifdef INET6 321 case 6: 322 if (sc->gif_psrc->sa_family != AF_INET6 || 323 sc->gif_pdst->sa_family != AF_INET6) 324 return 0; 325 return gif_encapcheck6(m, off, proto, arg); 326 #endif 327 default: 328 return 0; 329 } 330 } 331 332 int 333 gif_output(ifp, m, dst, rt) 334 struct ifnet *ifp; 335 struct mbuf *m; 336 struct sockaddr *dst; 337 struct rtentry *rt; /* added in net2 */ 338 { 339 struct gif_softc *sc = (struct gif_softc*)ifp; 340 int error = 0; 341 static int called = 0; /* XXX: MUTEX */ 342 343 /* 344 * gif may cause infinite recursion calls when misconfigured. 345 * We'll prevent this by introducing upper limit. 346 * XXX: this mechanism may introduce another problem about 347 * mutual exclusion of the variable CALLED, especially if we 348 * use kernel thread. 349 */ 350 if (++called > max_gif_nesting) { 351 log(LOG_NOTICE, 352 "gif_output: recursively called too many times(%d)\n", 353 called); 354 m_freem(m); 355 error = EIO; /* is there better errno? */ 356 goto end; 357 } 358 359 m->m_flags &= ~(M_BCAST|M_MCAST); 360 if (!(ifp->if_flags & IFF_UP) || 361 sc->gif_psrc == NULL || sc->gif_pdst == NULL) { 362 m_freem(m); 363 error = ENETDOWN; 364 goto end; 365 } 366 367 if (ifp->if_bpf) { 368 /* 369 * We need to prepend the address family as 370 * a four byte field. Cons up a dummy header 371 * to pacify bpf. This is safe because bpf 372 * will only read from the mbuf (i.e., it won't 373 * try to free it or keep a pointer a to it). 374 */ 375 struct mbuf m0; 376 u_int32_t af = dst->sa_family; 377 378 m0.m_next = m; 379 m0.m_len = 4; 380 m0.m_data = (char *)⁡ 381 382 bpf_mtap(ifp, &m0); 383 } 384 ifp->if_opackets++; 385 ifp->if_obytes += m->m_pkthdr.len; 386 387 /* inner AF-specific encapsulation */ 388 389 /* XXX should we check if our outer source is legal? */ 390 391 /* dispatch to output logic based on outer AF */ 392 switch (sc->gif_psrc->sa_family) { 393 #ifdef INET 394 case AF_INET: 395 error = in_gif_output(ifp, dst->sa_family, m, rt); 396 break; 397 #endif 398 #ifdef INET6 399 case AF_INET6: 400 error = in6_gif_output(ifp, dst->sa_family, m, rt); 401 break; 402 #endif 403 default: 404 m_freem(m); 405 error = ENETDOWN; 406 goto end; 407 } 408 409 end: 410 called = 0; /* reset recursion counter */ 411 if (error) 412 ifp->if_oerrors++; 413 return error; 414 } 415 416 void 417 gif_input(m, af, gifp) 418 struct mbuf *m; 419 int af; 420 struct ifnet *gifp; 421 { 422 int isr; 423 struct ifqueue *ifq = 0; 424 425 if (gifp == NULL) { 426 /* just in case */ 427 m_freem(m); 428 return; 429 } 430 431 m->m_pkthdr.rcvif = gifp; 432 433 if (gifp->if_bpf) { 434 /* 435 * We need to prepend the address family as 436 * a four byte field. Cons up a dummy header 437 * to pacify bpf. This is safe because bpf 438 * will only read from the mbuf (i.e., it won't 439 * try to free it or keep a pointer a to it). 440 */ 441 struct mbuf m0; 442 u_int32_t af1 = af; 443 444 m0.m_next = m; 445 m0.m_len = 4; 446 m0.m_data = (char *)&af1; 447 448 bpf_mtap(gifp, &m0); 449 } 450 451 if (ng_gif_input_p != NULL) { 452 (*ng_gif_input_p)(gifp, &m, af); 453 if (m == NULL) 454 return; 455 } 456 457 /* 458 * Put the packet to the network layer input queue according to the 459 * specified address family. 460 * Note: older versions of gif_input directly called network layer 461 * input functions, e.g. ip6_input, here. We changed the policy to 462 * prevent too many recursive calls of such input functions, which 463 * might cause kernel panic. But the change may introduce another 464 * problem; if the input queue is full, packets are discarded. 465 * The kernel stack overflow really happened, and we believed 466 * queue-full rarely occurs, so we changed the policy. 467 */ 468 switch (af) { 469 #ifdef INET 470 case AF_INET: 471 ifq = &ipintrq; 472 isr = NETISR_IP; 473 break; 474 #endif 475 #ifdef INET6 476 case AF_INET6: 477 ifq = &ip6intrq; 478 isr = NETISR_IPV6; 479 break; 480 #endif 481 default: 482 if (ng_gif_input_orphan_p != NULL) 483 (*ng_gif_input_orphan_p)(gifp, m, af); 484 else 485 m_freem(m); 486 return; 487 } 488 489 gifp->if_ipackets++; 490 gifp->if_ibytes += m->m_pkthdr.len; 491 (void) IF_HANDOFF(ifq, m, NULL); 492 /* we need schednetisr since the address family may change */ 493 schednetisr(isr); 494 495 return; 496 } 497 498 /* XXX how should we handle IPv6 scope on SIOC[GS]IFPHYADDR? */ 499 int 500 gif_ioctl(ifp, cmd, data) 501 struct ifnet *ifp; 502 u_long cmd; 503 caddr_t data; 504 { 505 struct gif_softc *sc = (struct gif_softc*)ifp; 506 struct ifreq *ifr = (struct ifreq*)data; 507 int error = 0, size; 508 struct sockaddr *dst, *src; 509 struct sockaddr *sa; 510 int s; 511 struct ifnet *ifp2; 512 struct gif_softc *sc2; 513 514 switch (cmd) { 515 case SIOCSIFADDR: 516 break; 517 518 case SIOCSIFDSTADDR: 519 break; 520 521 case SIOCADDMULTI: 522 case SIOCDELMULTI: 523 break; 524 525 #ifdef SIOCSIFMTU /* xxx */ 526 case SIOCGIFMTU: 527 break; 528 529 case SIOCSIFMTU: 530 { 531 u_long mtu; 532 mtu = ifr->ifr_mtu; 533 if (mtu < GIF_MTU_MIN || mtu > GIF_MTU_MAX) { 534 return (EINVAL); 535 } 536 ifp->if_mtu = mtu; 537 } 538 break; 539 #endif /* SIOCSIFMTU */ 540 541 case SIOCSIFPHYADDR: 542 #ifdef INET6 543 case SIOCSIFPHYADDR_IN6: 544 #endif /* INET6 */ 545 case SIOCSLIFPHYADDR: 546 switch (cmd) { 547 #ifdef INET 548 case SIOCSIFPHYADDR: 549 src = (struct sockaddr *) 550 &(((struct in_aliasreq *)data)->ifra_addr); 551 dst = (struct sockaddr *) 552 &(((struct in_aliasreq *)data)->ifra_dstaddr); 553 break; 554 #endif 555 #ifdef INET6 556 case SIOCSIFPHYADDR_IN6: 557 src = (struct sockaddr *) 558 &(((struct in6_aliasreq *)data)->ifra_addr); 559 dst = (struct sockaddr *) 560 &(((struct in6_aliasreq *)data)->ifra_dstaddr); 561 break; 562 #endif 563 case SIOCSLIFPHYADDR: 564 src = (struct sockaddr *) 565 &(((struct if_laddrreq *)data)->addr); 566 dst = (struct sockaddr *) 567 &(((struct if_laddrreq *)data)->dstaddr); 568 default: 569 error = EADDRNOTAVAIL; 570 goto bad; 571 } 572 573 /* sa_family must be equal */ 574 if (src->sa_family != dst->sa_family) 575 return EINVAL; 576 577 /* validate sa_len */ 578 switch (src->sa_family) { 579 #ifdef INET 580 case AF_INET: 581 if (src->sa_len != sizeof(struct sockaddr_in)) 582 return EINVAL; 583 break; 584 #endif 585 #ifdef INET6 586 case AF_INET6: 587 if (src->sa_len != sizeof(struct sockaddr_in6)) 588 return EINVAL; 589 break; 590 #endif 591 default: 592 return EAFNOSUPPORT; 593 } 594 switch (dst->sa_family) { 595 #ifdef INET 596 case AF_INET: 597 if (dst->sa_len != sizeof(struct sockaddr_in)) 598 return EINVAL; 599 break; 600 #endif 601 #ifdef INET6 602 case AF_INET6: 603 if (dst->sa_len != sizeof(struct sockaddr_in6)) 604 return EINVAL; 605 break; 606 #endif 607 default: 608 return EAFNOSUPPORT; 609 } 610 611 /* check sa_family looks sane for the cmd */ 612 switch (cmd) { 613 case SIOCSIFPHYADDR: 614 if (src->sa_family == AF_INET) 615 break; 616 return EAFNOSUPPORT; 617 #ifdef INET6 618 case SIOCSIFPHYADDR_IN6: 619 if (src->sa_family == AF_INET6) 620 break; 621 return EAFNOSUPPORT; 622 #endif /* INET6 */ 623 case SIOCSLIFPHYADDR: 624 /* checks done in the above */ 625 break; 626 } 627 628 TAILQ_FOREACH(ifp2, &ifnet, if_link) { 629 if (strcmp(ifp2->if_name, GIFNAME) != 0) 630 continue; 631 sc2 = ifp2->if_softc; 632 if (sc2 == sc) 633 continue; 634 if (!sc2->gif_pdst || !sc2->gif_psrc) 635 continue; 636 if (sc2->gif_pdst->sa_family != dst->sa_family || 637 sc2->gif_pdst->sa_len != dst->sa_len || 638 sc2->gif_psrc->sa_family != src->sa_family || 639 sc2->gif_psrc->sa_len != src->sa_len) 640 continue; 641 642 /* 643 * Disallow parallel tunnels unless instructed 644 * otherwise. 645 */ 646 if (!parallel_tunnels && 647 bcmp(sc2->gif_pdst, dst, dst->sa_len) == 0 && 648 bcmp(sc2->gif_psrc, src, src->sa_len) == 0) { 649 error = EADDRNOTAVAIL; 650 goto bad; 651 } 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