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 GIF_MAXUNIT 0x7fff /* ifp->if_unit is only 15 bits */ 85 86 static MALLOC_DEFINE(M_GIF, "gif", "Generic Tunnel Interface"); 87 static struct rman gifunits[1]; 88 LIST_HEAD(, gif_softc) gif_softc_list; 89 90 void (*ng_gif_input_p)(struct ifnet *ifp, struct mbuf **mp, int af); 91 void (*ng_gif_input_orphan_p)(struct ifnet *ifp, struct mbuf *m, int af); 92 void (*ng_gif_attach_p)(struct ifnet *ifp); 93 void (*ng_gif_detach_p)(struct ifnet *ifp); 94 95 int gif_clone_create __P((struct if_clone *, int *)); 96 void gif_clone_destroy __P((struct ifnet *)); 97 98 struct if_clone gif_cloner = 99 IF_CLONE_INITIALIZER("gif", gif_clone_create, gif_clone_destroy); 100 101 static int gifmodevent __P((module_t, int, void *)); 102 void gif_delete_tunnel __P((struct gif_softc *)); 103 static int gif_encapcheck __P((const struct mbuf *, int, int, void *)); 104 105 #ifdef INET 106 extern struct domain inetdomain; 107 struct protosw in_gif_protosw = 108 { SOCK_RAW, &inetdomain, 0/*IPPROTO_IPV[46]*/, PR_ATOMIC|PR_ADDR, 109 in_gif_input, rip_output, 0, rip_ctloutput, 110 0, 111 0, 0, 0, 0, 112 &rip_usrreqs 113 }; 114 #endif 115 #ifdef INET6 116 extern struct domain6 inet6domain; 117 struct ip6protosw in6_gif_protosw = 118 { SOCK_RAW, &inet6domain, 0/*IPPROTO_IPV[46]*/, PR_ATOMIC|PR_ADDR, 119 in6_gif_input, rip6_output, 0, rip6_ctloutput, 120 0, 121 0, 0, 0, 0, 122 &rip6_usrreqs 123 }; 124 #endif 125 126 #ifndef MAX_GIF_NEST 127 /* 128 * This macro controls the 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; 138 139 int 140 gif_clone_create(ifc, unit) 141 struct if_clone *ifc; 142 int *unit; 143 { 144 struct resource *r; 145 struct gif_softc *sc; 146 147 if (*unit > GIF_MAXUNIT) 148 return (ENXIO); 149 150 if (*unit < 0) { 151 r = rman_reserve_resource(gifunits, 0, GIF_MAXUNIT, 1, 152 RF_ALLOCATED | RF_ACTIVE, NULL); 153 if (r == NULL) 154 return (ENOSPC); 155 *unit = rman_get_start(r); 156 } else { 157 r = rman_reserve_resource(gifunits, *unit, *unit, 1, 158 RF_ALLOCATED | RF_ACTIVE, NULL); 159 if (r == NULL) 160 return (EEXIST); 161 } 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 sc->r_unit = r; 170 171 sc->encap_cookie4 = sc->encap_cookie6 = NULL; 172 #ifdef INET 173 sc->encap_cookie4 = encap_attach_func(AF_INET, -1, 174 gif_encapcheck, (struct protosw*)&in_gif_protosw, sc); 175 if (sc->encap_cookie4 == NULL) { 176 printf("%s: unable to attach encap4\n", if_name(&sc->gif_if)); 177 free(sc, M_GIF); 178 return (EIO); /* XXX */ 179 } 180 #endif 181 #ifdef INET6 182 sc->encap_cookie6 = encap_attach_func(AF_INET6, -1, 183 gif_encapcheck, (struct protosw *)&in6_gif_protosw, sc); 184 if (sc->encap_cookie6 == NULL) { 185 if (sc->encap_cookie4) { 186 encap_detach(sc->encap_cookie4); 187 sc->encap_cookie4 = NULL; 188 } 189 printf("%s: unable to attach encap6\n", if_name(&sc->gif_if)); 190 free(sc, M_GIF); 191 return (EIO); /* XXX */ 192 } 193 #endif 194 195 sc->gif_if.if_mtu = GIF_MTU; 196 sc->gif_if.if_flags = IFF_POINTOPOINT | IFF_MULTICAST; 197 #if 0 198 /* turn off ingress filter */ 199 sc->gif_if.if_flags |= IFF_LINK2; 200 #endif 201 sc->gif_if.if_ioctl = gif_ioctl; 202 sc->gif_if.if_output = gif_output; 203 sc->gif_if.if_type = IFT_GIF; 204 sc->gif_if.if_snd.ifq_maxlen = IFQ_MAXLEN; 205 if_attach(&sc->gif_if); 206 bpfattach(&sc->gif_if, DLT_NULL, sizeof(u_int)); 207 if (ng_gif_attach_p != NULL) 208 (*ng_gif_attach_p)(&sc->gif_if); 209 LIST_INSERT_HEAD(&gif_softc_list, sc, gif_link); 210 return (0); 211 } 212 213 void 214 gif_clone_destroy(ifp) 215 struct ifnet *ifp; 216 { 217 int err; 218 struct gif_softc *sc = ifp->if_softc; 219 220 gif_delete_tunnel(sc); 221 LIST_REMOVE(sc, gif_link); 222 if (sc->encap_cookie4 != NULL) { 223 err = encap_detach(sc->encap_cookie4); 224 KASSERT(err == 0, ("Unexpected error detaching encap_cookie4")); 225 } 226 if (sc->encap_cookie6 != NULL) { 227 err = encap_detach(sc->encap_cookie6); 228 KASSERT(err == 0, ("Unexpected error detaching encap_cookie6")); 229 } 230 231 if (ng_gif_detach_p != NULL) 232 (*ng_gif_detach_p)(ifp); 233 bpfdetach(ifp); 234 if_detach(ifp); 235 236 err = rman_release_resource(sc->r_unit); 237 KASSERT(err == 0, ("Unexpected error freeing resource")); 238 239 free(sc, M_GIF); 240 } 241 242 static int 243 gifmodevent(mod, type, data) 244 module_t mod; 245 int type; 246 void *data; 247 { 248 int err; 249 250 switch (type) { 251 case MOD_LOAD: 252 gifunits->rm_type = RMAN_ARRAY; 253 gifunits->rm_descr = "configurable if_gif units"; 254 err = rman_init(gifunits); 255 if (err != 0) 256 return (err); 257 err = rman_manage_region(gifunits, 0, GIF_MAXUNIT); 258 if (err != 0) { 259 printf("%s: gifunits: rman_manage_region: Failed %d\n", 260 GIFNAME, err); 261 rman_fini(gifunits); 262 return (err); 263 } 264 LIST_INIT(&gif_softc_list); 265 if_clone_attach(&gif_cloner); 266 267 #ifdef INET6 268 ip6_gif_hlim = GIF_HLIM; 269 #endif 270 271 break; 272 case MOD_UNLOAD: 273 if_clone_detach(&gif_cloner); 274 275 while (!LIST_EMPTY(&gif_softc_list)) 276 gif_clone_destroy(&LIST_FIRST(&gif_softc_list)->gif_if); 277 278 err = rman_fini(gifunits); 279 if (err != 0) 280 return (err); 281 #ifdef INET6 282 ip6_gif_hlim = 0; 283 #endif 284 break; 285 } 286 return 0; 287 } 288 289 static moduledata_t gif_mod = { 290 "if_gif", 291 gifmodevent, 292 0 293 }; 294 295 DECLARE_MODULE(if_gif, gif_mod, SI_SUB_PSEUDO, SI_ORDER_ANY); 296 MODULE_VERSION(if_gif, 1); 297 298 static int 299 gif_encapcheck(m, off, proto, arg) 300 const struct mbuf *m; 301 int off; 302 int proto; 303 void *arg; 304 { 305 struct ip ip; 306 struct gif_softc *sc; 307 308 sc = (struct gif_softc *)arg; 309 if (sc == NULL) 310 return 0; 311 312 if ((sc->gif_if.if_flags & IFF_UP) == 0) 313 return 0; 314 315 /* no physical address */ 316 if (!sc->gif_psrc || !sc->gif_pdst) 317 return 0; 318 319 switch (proto) { 320 #ifdef INET 321 case IPPROTO_IPV4: 322 break; 323 #endif 324 #ifdef INET6 325 case IPPROTO_IPV6: 326 break; 327 #endif 328 default: 329 return 0; 330 } 331 332 /* LINTED const cast */ 333 m_copydata((struct mbuf *)m, 0, sizeof(ip), (caddr_t)&ip); 334 335 switch (ip.ip_v) { 336 #ifdef INET 337 case 4: 338 if (sc->gif_psrc->sa_family != AF_INET || 339 sc->gif_pdst->sa_family != AF_INET) 340 return 0; 341 return gif_encapcheck4(m, off, proto, arg); 342 #endif 343 #ifdef INET6 344 case 6: 345 if (sc->gif_psrc->sa_family != AF_INET6 || 346 sc->gif_pdst->sa_family != AF_INET6) 347 return 0; 348 return gif_encapcheck6(m, off, proto, arg); 349 #endif 350 default: 351 return 0; 352 } 353 } 354 355 int 356 gif_output(ifp, m, dst, rt) 357 struct ifnet *ifp; 358 struct mbuf *m; 359 struct sockaddr *dst; 360 struct rtentry *rt; /* added in net2 */ 361 { 362 struct gif_softc *sc = (struct gif_softc*)ifp; 363 int error = 0; 364 static int called = 0; /* XXX: MUTEX */ 365 366 /* 367 * gif may cause infinite recursion calls when misconfigured. 368 * We'll prevent this by introducing upper limit. 369 * XXX: this mechanism may introduce another problem about 370 * mutual exclusion of the variable CALLED, especially if we 371 * use kernel thread. 372 */ 373 if (++called > max_gif_nesting) { 374 log(LOG_NOTICE, 375 "gif_output: recursively called too many times(%d)\n", 376 called); 377 m_freem(m); 378 error = EIO; /* is there better errno? */ 379 goto end; 380 } 381 382 m->m_flags &= ~(M_BCAST|M_MCAST); 383 if (!(ifp->if_flags & IFF_UP) || 384 sc->gif_psrc == NULL || sc->gif_pdst == NULL) { 385 m_freem(m); 386 error = ENETDOWN; 387 goto end; 388 } 389 390 if (ifp->if_bpf) { 391 /* 392 * We need to prepend the address family as 393 * a four byte field. Cons up a dummy header 394 * to pacify bpf. This is safe because bpf 395 * will only read from the mbuf (i.e., it won't 396 * try to free it or keep a pointer a to it). 397 */ 398 struct mbuf m0; 399 u_int32_t af = dst->sa_family; 400 401 m0.m_next = m; 402 m0.m_len = 4; 403 m0.m_data = (char *)⁡ 404 405 bpf_mtap(ifp, &m0); 406 } 407 ifp->if_opackets++; 408 ifp->if_obytes += m->m_pkthdr.len; 409 410 /* inner AF-specific encapsulation */ 411 412 /* XXX should we check if our outer source is legal? */ 413 414 /* dispatch to output logic based on outer AF */ 415 switch (sc->gif_psrc->sa_family) { 416 #ifdef INET 417 case AF_INET: 418 error = in_gif_output(ifp, dst->sa_family, m, rt); 419 break; 420 #endif 421 #ifdef INET6 422 case AF_INET6: 423 error = in6_gif_output(ifp, dst->sa_family, m, rt); 424 break; 425 #endif 426 default: 427 m_freem(m); 428 error = ENETDOWN; 429 goto end; 430 } 431 432 end: 433 called = 0; /* reset recursion counter */ 434 if (error) 435 ifp->if_oerrors++; 436 return error; 437 } 438 439 void 440 gif_input(m, af, gifp) 441 struct mbuf *m; 442 int af; 443 struct ifnet *gifp; 444 { 445 int isr; 446 struct ifqueue *ifq = 0; 447 448 if (gifp == NULL) { 449 /* just in case */ 450 m_freem(m); 451 return; 452 } 453 454 m->m_pkthdr.rcvif = gifp; 455 456 if (gifp->if_bpf) { 457 /* 458 * We need to prepend the address family as 459 * a four byte field. Cons up a dummy header 460 * to pacify bpf. This is safe because bpf 461 * will only read from the mbuf (i.e., it won't 462 * try to free it or keep a pointer a to it). 463 */ 464 struct mbuf m0; 465 u_int32_t af1 = af; 466 467 m0.m_next = m; 468 m0.m_len = 4; 469 m0.m_data = (char *)&af1; 470 471 bpf_mtap(gifp, &m0); 472 } 473 474 if (ng_gif_input_p != NULL) { 475 (*ng_gif_input_p)(gifp, &m, af); 476 if (m == NULL) 477 return; 478 } 479 480 /* 481 * Put the packet to the network layer input queue according to the 482 * specified address family. 483 * Note: older versions of gif_input directly called network layer 484 * input functions, e.g. ip6_input, here. We changed the policy to 485 * prevent too many recursive calls of such input functions, which 486 * might cause kernel panic. But the change may introduce another 487 * problem; if the input queue is full, packets are discarded. 488 * We believed it rarely occurs and changed the policy. If we find 489 * it occurs more times than we thought, we may change the policy 490 * again. 491 */ 492 switch (af) { 493 #ifdef INET 494 case AF_INET: 495 ifq = &ipintrq; 496 isr = NETISR_IP; 497 break; 498 #endif 499 #ifdef INET6 500 case AF_INET6: 501 ifq = &ip6intrq; 502 isr = NETISR_IPV6; 503 break; 504 #endif 505 default: 506 if (ng_gif_input_orphan_p != NULL) 507 (*ng_gif_input_orphan_p)(gifp, m, af); 508 else 509 m_freem(m); 510 return; 511 } 512 513 gifp->if_ipackets++; 514 gifp->if_ibytes += m->m_pkthdr.len; 515 (void) IF_HANDOFF(ifq, m, NULL); 516 /* we need schednetisr since the address family may change */ 517 schednetisr(isr); 518 519 return; 520 } 521 522 /* XXX how should we handle IPv6 scope on SIOC[GS]IFPHYADDR? */ 523 int 524 gif_ioctl(ifp, cmd, data) 525 struct ifnet *ifp; 526 u_long cmd; 527 caddr_t data; 528 { 529 struct gif_softc *sc = (struct gif_softc*)ifp; 530 struct ifreq *ifr = (struct ifreq*)data; 531 int error = 0, size; 532 struct sockaddr *dst, *src; 533 struct sockaddr *sa; 534 int s; 535 struct ifnet *ifp2; 536 struct gif_softc *sc2; 537 538 switch (cmd) { 539 case SIOCSIFADDR: 540 break; 541 542 case SIOCSIFDSTADDR: 543 break; 544 545 case SIOCADDMULTI: 546 case SIOCDELMULTI: 547 break; 548 549 #ifdef SIOCSIFMTU /* xxx */ 550 case SIOCGIFMTU: 551 break; 552 553 case SIOCSIFMTU: 554 { 555 u_long mtu; 556 mtu = ifr->ifr_mtu; 557 if (mtu < GIF_MTU_MIN || mtu > GIF_MTU_MAX) { 558 return (EINVAL); 559 } 560 ifp->if_mtu = mtu; 561 } 562 break; 563 #endif /* SIOCSIFMTU */ 564 565 case SIOCSIFPHYADDR: 566 #ifdef INET6 567 case SIOCSIFPHYADDR_IN6: 568 #endif /* INET6 */ 569 case SIOCSLIFPHYADDR: 570 switch (cmd) { 571 #ifdef INET 572 case SIOCSIFPHYADDR: 573 src = (struct sockaddr *) 574 &(((struct in_aliasreq *)data)->ifra_addr); 575 dst = (struct sockaddr *) 576 &(((struct in_aliasreq *)data)->ifra_dstaddr); 577 break; 578 #endif 579 #ifdef INET6 580 case SIOCSIFPHYADDR_IN6: 581 src = (struct sockaddr *) 582 &(((struct in6_aliasreq *)data)->ifra_addr); 583 dst = (struct sockaddr *) 584 &(((struct in6_aliasreq *)data)->ifra_dstaddr); 585 break; 586 #endif 587 case SIOCSLIFPHYADDR: 588 src = (struct sockaddr *) 589 &(((struct if_laddrreq *)data)->addr); 590 dst = (struct sockaddr *) 591 &(((struct if_laddrreq *)data)->dstaddr); 592 } 593 594 /* sa_family must be equal */ 595 if (src->sa_family != dst->sa_family) 596 return EINVAL; 597 598 /* validate sa_len */ 599 switch (src->sa_family) { 600 #ifdef INET 601 case AF_INET: 602 if (src->sa_len != sizeof(struct sockaddr_in)) 603 return EINVAL; 604 break; 605 #endif 606 #ifdef INET6 607 case AF_INET6: 608 if (src->sa_len != sizeof(struct sockaddr_in6)) 609 return EINVAL; 610 break; 611 #endif 612 default: 613 return EAFNOSUPPORT; 614 } 615 switch (dst->sa_family) { 616 #ifdef INET 617 case AF_INET: 618 if (dst->sa_len != sizeof(struct sockaddr_in)) 619 return EINVAL; 620 break; 621 #endif 622 #ifdef INET6 623 case AF_INET6: 624 if (dst->sa_len != sizeof(struct sockaddr_in6)) 625 return EINVAL; 626 break; 627 #endif 628 default: 629 return EAFNOSUPPORT; 630 } 631 632 /* check sa_family looks sane for the cmd */ 633 switch (cmd) { 634 case SIOCSIFPHYADDR: 635 if (src->sa_family == AF_INET) 636 break; 637 return EAFNOSUPPORT; 638 #ifdef INET6 639 case SIOCSIFPHYADDR_IN6: 640 if (src->sa_family == AF_INET6) 641 break; 642 return EAFNOSUPPORT; 643 #endif /* INET6 */ 644 case SIOCSLIFPHYADDR: 645 /* checks done in the above */ 646 break; 647 } 648 649 TAILQ_FOREACH(ifp2, &ifnet, if_link) { 650 if (strcmp(ifp2->if_name, GIFNAME) != 0) 651 continue; 652 sc2 = ifp2->if_softc; 653 if (sc2 == sc) 654 continue; 655 if (!sc2->gif_pdst || !sc2->gif_psrc) 656 continue; 657 if (sc2->gif_pdst->sa_family != dst->sa_family || 658 sc2->gif_pdst->sa_len != dst->sa_len || 659 sc2->gif_psrc->sa_family != src->sa_family || 660 sc2->gif_psrc->sa_len != src->sa_len) 661 continue; 662 #ifndef XBONEHACK 663 /* can't configure same pair of address onto two gifs */ 664 if (bcmp(sc2->gif_pdst, dst, dst->sa_len) == 0 && 665 bcmp(sc2->gif_psrc, src, src->sa_len) == 0) { 666 error = EADDRNOTAVAIL; 667 goto bad; 668 } 669 #endif 670 671 /* can't configure multiple multi-dest interfaces */ 672 #define multidest(x) \ 673 (((struct sockaddr_in *)(x))->sin_addr.s_addr == INADDR_ANY) 674 #ifdef INET6 675 #define multidest6(x) \ 676 (IN6_IS_ADDR_UNSPECIFIED(&((struct sockaddr_in6 *)(x))->sin6_addr)) 677 #endif 678 if (dst->sa_family == AF_INET && 679 multidest(dst) && multidest(sc2->gif_pdst)) { 680 error = EADDRNOTAVAIL; 681 goto bad; 682 } 683 #ifdef INET6 684 if (dst->sa_family == AF_INET6 && 685 multidest6(dst) && multidest6(sc2->gif_pdst)) { 686 error = EADDRNOTAVAIL; 687 goto bad; 688 } 689 #endif 690 } 691 692 if (sc->gif_psrc) 693 free((caddr_t)sc->gif_psrc, M_IFADDR); 694 sa = (struct sockaddr *)malloc(src->sa_len, M_IFADDR, M_WAITOK); 695 bcopy((caddr_t)src, (caddr_t)sa, src->sa_len); 696 sc->gif_psrc = sa; 697 698 if (sc->gif_pdst) 699 free((caddr_t)sc->gif_pdst, M_IFADDR); 700 sa = (struct sockaddr *)malloc(dst->sa_len, M_IFADDR, M_WAITOK); 701 bcopy((caddr_t)dst, (caddr_t)sa, dst->sa_len); 702 sc->gif_pdst = sa; 703 704 ifp->if_flags |= IFF_RUNNING; 705 s = splimp(); 706 if_up(ifp); /* mark interface UP and send up RTM_IFINFO */ 707 splx(s); 708 709 error = 0; 710 break; 711 712 #ifdef SIOCDIFPHYADDR 713 case SIOCDIFPHYADDR: 714 if (sc->gif_psrc) { 715 free((caddr_t)sc->gif_psrc, M_IFADDR); 716 sc->gif_psrc = NULL; 717 } 718 if (sc->gif_pdst) { 719 free((caddr_t)sc->gif_pdst, M_IFADDR); 720 sc->gif_pdst = NULL; 721 } 722 /* change the IFF_{UP, RUNNING} flag as well? */ 723 break; 724 #endif 725 726 case SIOCGIFPSRCADDR: 727 #ifdef INET6 728 case SIOCGIFPSRCADDR_IN6: 729 #endif /* INET6 */ 730 if (sc->gif_psrc == NULL) { 731 error = EADDRNOTAVAIL; 732 goto bad; 733 } 734 src = sc->gif_psrc; 735 switch (cmd) { 736 #ifdef INET 737 case SIOCGIFPSRCADDR: 738 dst = &ifr->ifr_addr; 739 size = sizeof(ifr->ifr_addr); 740 break; 741 #endif /* INET */ 742 #ifdef INET6 743 case SIOCGIFPSRCADDR_IN6: 744 dst = (struct sockaddr *) 745 &(((struct in6_ifreq *)data)->ifr_addr); 746 size = sizeof(((struct in6_ifreq *)data)->ifr_addr); 747 break; 748 #endif /* INET6 */ 749 default: 750 error = EADDRNOTAVAIL; 751 goto bad; 752 } 753 if (src->sa_len > size) 754 return EINVAL; 755 bcopy((caddr_t)src, (caddr_t)dst, src->sa_len); 756 break; 757 758 case SIOCGIFPDSTADDR: 759 #ifdef INET6 760 case SIOCGIFPDSTADDR_IN6: 761 #endif /* INET6 */ 762 if (sc->gif_pdst == NULL) { 763 error = EADDRNOTAVAIL; 764 goto bad; 765 } 766 src = sc->gif_pdst; 767 switch (cmd) { 768 #ifdef INET 769 case SIOCGIFPDSTADDR: 770 dst = &ifr->ifr_addr; 771 size = sizeof(ifr->ifr_addr); 772 break; 773 #endif /* INET */ 774 #ifdef INET6 775 case SIOCGIFPDSTADDR_IN6: 776 dst = (struct sockaddr *) 777 &(((struct in6_ifreq *)data)->ifr_addr); 778 size = sizeof(((struct in6_ifreq *)data)->ifr_addr); 779 break; 780 #endif /* INET6 */ 781 default: 782 error = EADDRNOTAVAIL; 783 goto bad; 784 } 785 if (src->sa_len > size) 786 return EINVAL; 787 bcopy((caddr_t)src, (caddr_t)dst, src->sa_len); 788 break; 789 790 case SIOCGLIFPHYADDR: 791 if (sc->gif_psrc == NULL || sc->gif_pdst == NULL) { 792 error = EADDRNOTAVAIL; 793 goto bad; 794 } 795 796 /* copy src */ 797 src = sc->gif_psrc; 798 dst = (struct sockaddr *) 799 &(((struct if_laddrreq *)data)->addr); 800 size = sizeof(((struct if_laddrreq *)data)->addr); 801 if (src->sa_len > size) 802 return EINVAL; 803 bcopy((caddr_t)src, (caddr_t)dst, src->sa_len); 804 805 /* copy dst */ 806 src = sc->gif_pdst; 807 dst = (struct sockaddr *) 808 &(((struct if_laddrreq *)data)->dstaddr); 809 size = sizeof(((struct if_laddrreq *)data)->dstaddr); 810 if (src->sa_len > size) 811 return EINVAL; 812 bcopy((caddr_t)src, (caddr_t)dst, src->sa_len); 813 break; 814 815 case SIOCSIFFLAGS: 816 /* if_ioctl() takes care of it */ 817 break; 818 819 default: 820 error = EINVAL; 821 break; 822 } 823 bad: 824 return error; 825 } 826 827 void 828 gif_delete_tunnel(sc) 829 struct gif_softc *sc; 830 { 831 /* XXX: NetBSD protects this function with splsoftnet() */ 832 833 if (sc->gif_psrc) { 834 free((caddr_t)sc->gif_psrc, M_IFADDR); 835 sc->gif_psrc = NULL; 836 } 837 if (sc->gif_pdst) { 838 free((caddr_t)sc->gif_pdst, M_IFADDR); 839 sc->gif_pdst = NULL; 840 } 841 /* change the IFF_UP flag as well? */ 842 } 843