| 1 | /* |
| 2 | * Copyright (c) 1980, 1986, 1993 |
| 3 | * The Regents of the University of California. All rights reserved. |
| 4 | * |
| 5 | * Redistribution and use in source and binary forms, with or without |
| 6 | * modification, are permitted provided that the following conditions |
| 7 | * are met: |
| 8 | * 1. Redistributions of source code must retain the above copyright |
| 9 | * notice, this list of conditions and the following disclaimer. |
| 10 | * 2. Redistributions in binary form must reproduce the above copyright |
| 11 | * notice, this list of conditions and the following disclaimer in the |
| 12 | * documentation and/or other materials provided with the distribution. |
| 13 | * 3. All advertising materials mentioning features or use of this software |
| 14 | * must display the following acknowledgement: |
| 15 | * This product includes software developed by the University of |
| 16 | * California, Berkeley and its contributors. |
| 17 | * 4. Neither the name of the University nor the names of its contributors |
| 18 | * may be used to endorse or promote products derived from this software |
| 19 | * without specific prior written permission. |
| 20 | * |
| 21 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 22 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 23 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 24 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 25 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 26 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 27 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 28 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 29 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 30 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 31 | * SUCH DAMAGE. |
| 32 | * |
| 33 | * @(#)if.c 8.3 (Berkeley) 1/4/94 |
| 34 | * $FreeBSD: src/sys/net/if.c,v 1.185 2004/03/13 02:35:03 brooks Exp $ |
| 35 | * $DragonFly: src/sys/net/if.c,v 1.29 2005/03/04 02:21:48 hsu Exp $ |
| 36 | */ |
| 37 | |
| 38 | #include "opt_compat.h" |
| 39 | #include "opt_inet6.h" |
| 40 | #include "opt_inet.h" |
| 41 | |
| 42 | #include <sys/param.h> |
| 43 | #include <sys/malloc.h> |
| 44 | #include <sys/mbuf.h> |
| 45 | #include <sys/systm.h> |
| 46 | #include <sys/proc.h> |
| 47 | #include <sys/protosw.h> |
| 48 | #include <sys/socket.h> |
| 49 | #include <sys/socketvar.h> |
| 50 | #include <sys/socketops.h> |
| 51 | #include <sys/protosw.h> |
| 52 | #include <sys/kernel.h> |
| 53 | #include <sys/sockio.h> |
| 54 | #include <sys/syslog.h> |
| 55 | #include <sys/sysctl.h> |
| 56 | #include <sys/domain.h> |
| 57 | |
| 58 | #include <net/if.h> |
| 59 | #include <net/if_arp.h> |
| 60 | #include <net/if_dl.h> |
| 61 | #include <net/if_types.h> |
| 62 | #include <net/if_var.h> |
| 63 | #include <net/ifq_var.h> |
| 64 | #include <net/radix.h> |
| 65 | #include <net/route.h> |
| 66 | #include <machine/stdarg.h> |
| 67 | |
| 68 | #if defined(INET) || defined(INET6) |
| 69 | /*XXX*/ |
| 70 | #include <netinet/in.h> |
| 71 | #include <netinet/in_var.h> |
| 72 | #include <netinet/if_ether.h> |
| 73 | #ifdef INET6 |
| 74 | #include <machine/clock.h> /* XXX: temporal workaround for fxp issue */ |
| 75 | #include <netinet6/in6_var.h> |
| 76 | #include <netinet6/in6_ifattach.h> |
| 77 | #endif |
| 78 | #endif |
| 79 | |
| 80 | #if defined(COMPAT_43) |
| 81 | #include <emulation/43bsd/43bsd_socket.h> |
| 82 | #endif /* COMPAT_43 */ |
| 83 | |
| 84 | /* |
| 85 | * System initialization |
| 86 | */ |
| 87 | |
| 88 | static void if_attachdomain(void *); |
| 89 | static void if_attachdomain1(struct ifnet *); |
| 90 | static int ifconf (u_long, caddr_t, struct thread *); |
| 91 | static void ifinit (void *); |
| 92 | static void if_slowtimo (void *); |
| 93 | static void link_rtrequest (int, struct rtentry *, struct rt_addrinfo *); |
| 94 | static int if_rtdel (struct radix_node *, void *); |
| 95 | |
| 96 | SYSINIT(interfaces, SI_SUB_PROTO_IF, SI_ORDER_FIRST, ifinit, NULL) |
| 97 | |
| 98 | MALLOC_DEFINE(M_IFADDR, "ifaddr", "interface address"); |
| 99 | MALLOC_DEFINE(M_IFMADDR, "ether_multi", "link-level multicast address"); |
| 100 | MALLOC_DEFINE(M_CLONE, "clone", "interface cloning framework"); |
| 101 | |
| 102 | int ifqmaxlen = IFQ_MAXLEN; |
| 103 | struct ifnethead ifnet; /* depend on static init XXX */ |
| 104 | |
| 105 | #ifdef INET6 |
| 106 | /* |
| 107 | * XXX: declare here to avoid to include many inet6 related files.. |
| 108 | * should be more generalized? |
| 109 | */ |
| 110 | extern void nd6_setmtu (struct ifnet *); |
| 111 | #endif |
| 112 | |
| 113 | struct if_clone *if_clone_lookup (const char *, int *); |
| 114 | int if_clone_list (struct if_clonereq *); |
| 115 | |
| 116 | LIST_HEAD(, if_clone) if_cloners = LIST_HEAD_INITIALIZER(if_cloners); |
| 117 | int if_cloners_count; |
| 118 | |
| 119 | struct callout if_slowtimo_timer; |
| 120 | |
| 121 | /* |
| 122 | * Network interface utility routines. |
| 123 | * |
| 124 | * Routines with ifa_ifwith* names take sockaddr *'s as |
| 125 | * parameters. |
| 126 | */ |
| 127 | /* ARGSUSED*/ |
| 128 | void |
| 129 | ifinit(void *dummy) |
| 130 | { |
| 131 | struct ifnet *ifp; |
| 132 | int s; |
| 133 | |
| 134 | callout_init(&if_slowtimo_timer); |
| 135 | |
| 136 | s = splimp(); |
| 137 | TAILQ_FOREACH(ifp, &ifnet, if_link) { |
| 138 | if (ifp->if_snd.ifq_maxlen == 0) { |
| 139 | if_printf(ifp, "XXX: driver didn't set ifq_maxlen\n"); |
| 140 | ifp->if_snd.ifq_maxlen = ifqmaxlen; |
| 141 | } |
| 142 | } |
| 143 | splx(s); |
| 144 | |
| 145 | if_slowtimo(0); |
| 146 | } |
| 147 | |
| 148 | int if_index = 0; |
| 149 | struct ifaddr **ifnet_addrs; |
| 150 | struct ifnet **ifindex2ifnet = NULL; |
| 151 | |
| 152 | /* |
| 153 | * Attach an interface to the |
| 154 | * list of "active" interfaces. |
| 155 | */ |
| 156 | void |
| 157 | if_attach(struct ifnet *ifp) |
| 158 | { |
| 159 | unsigned socksize, ifasize; |
| 160 | int namelen, masklen; |
| 161 | struct sockaddr_dl *sdl; |
| 162 | struct ifaddr *ifa; |
| 163 | |
| 164 | static int if_indexlim = 8; |
| 165 | static boolean_t inited; |
| 166 | |
| 167 | if (!inited) { |
| 168 | TAILQ_INIT(&ifnet); |
| 169 | inited = TRUE; |
| 170 | } |
| 171 | |
| 172 | TAILQ_INSERT_TAIL(&ifnet, ifp, if_link); |
| 173 | ifp->if_index = ++if_index; |
| 174 | /* |
| 175 | * XXX - |
| 176 | * The old code would work if the interface passed a pre-existing |
| 177 | * chain of ifaddrs to this code. We don't trust our callers to |
| 178 | * properly initialize the tailq, however, so we no longer allow |
| 179 | * this unlikely case. |
| 180 | */ |
| 181 | TAILQ_INIT(&ifp->if_addrhead); |
| 182 | TAILQ_INIT(&ifp->if_prefixhead); |
| 183 | LIST_INIT(&ifp->if_multiaddrs); |
| 184 | getmicrotime(&ifp->if_lastchange); |
| 185 | if (ifnet_addrs == NULL || if_index >= if_indexlim) { |
| 186 | unsigned int n; |
| 187 | caddr_t q; |
| 188 | |
| 189 | if_indexlim <<= 1; |
| 190 | n = if_indexlim * sizeof(struct ifaddr *); |
| 191 | q = malloc(n, M_IFADDR, M_WAITOK | M_ZERO); |
| 192 | if (ifnet_addrs != NULL) { |
| 193 | bcopy(ifnet_addrs, q, n/2); |
| 194 | free(ifnet_addrs, M_IFADDR); |
| 195 | } |
| 196 | ifnet_addrs = (struct ifaddr **)q; |
| 197 | |
| 198 | /* grow ifindex2ifnet */ |
| 199 | n = if_indexlim * sizeof(struct ifnet *); |
| 200 | q = malloc(n, M_IFADDR, M_WAITOK | M_ZERO); |
| 201 | if (ifindex2ifnet) { |
| 202 | bcopy(ifindex2ifnet, q, n/2); |
| 203 | free(ifindex2ifnet, M_IFADDR); |
| 204 | } |
| 205 | ifindex2ifnet = (struct ifnet **)q; |
| 206 | } |
| 207 | |
| 208 | ifindex2ifnet[if_index] = ifp; |
| 209 | |
| 210 | /* |
| 211 | * create a Link Level name for this device |
| 212 | */ |
| 213 | namelen = strlen(ifp->if_xname); |
| 214 | #define _offsetof(t, m) ((int)((caddr_t)&((t *)0)->m)) |
| 215 | masklen = _offsetof(struct sockaddr_dl, sdl_data[0]) + namelen; |
| 216 | socksize = masklen + ifp->if_addrlen; |
| 217 | #define ROUNDUP(a) (1 + (((a) - 1) | (sizeof(long) - 1))) |
| 218 | if (socksize < sizeof(*sdl)) |
| 219 | socksize = sizeof(*sdl); |
| 220 | socksize = ROUNDUP(socksize); |
| 221 | ifasize = sizeof(struct ifaddr) + 2 * socksize; |
| 222 | ifa = malloc(ifasize, M_IFADDR, M_WAITOK | M_ZERO); |
| 223 | sdl = (struct sockaddr_dl *)(ifa + 1); |
| 224 | sdl->sdl_len = socksize; |
| 225 | sdl->sdl_family = AF_LINK; |
| 226 | bcopy(ifp->if_xname, sdl->sdl_data, namelen); |
| 227 | sdl->sdl_nlen = namelen; |
| 228 | sdl->sdl_index = ifp->if_index; |
| 229 | sdl->sdl_type = ifp->if_type; |
| 230 | ifnet_addrs[if_index - 1] = ifa; |
| 231 | ifa->ifa_ifp = ifp; |
| 232 | ifa->ifa_rtrequest = link_rtrequest; |
| 233 | ifa->ifa_addr = (struct sockaddr *)sdl; |
| 234 | sdl = (struct sockaddr_dl *)(socksize + (caddr_t)sdl); |
| 235 | ifa->ifa_netmask = (struct sockaddr *)sdl; |
| 236 | sdl->sdl_len = masklen; |
| 237 | while (namelen != 0) |
| 238 | sdl->sdl_data[--namelen] = 0xff; |
| 239 | TAILQ_INSERT_HEAD(&ifp->if_addrhead, ifa, ifa_link); |
| 240 | |
| 241 | EVENTHANDLER_INVOKE(ifnet_attach_event, ifp); |
| 242 | |
| 243 | ifp->if_snd.altq_type = 0; |
| 244 | ifp->if_snd.altq_disc = NULL; |
| 245 | ifp->if_snd.altq_flags &= ALTQF_CANTCHANGE; |
| 246 | ifp->if_snd.altq_tbr = NULL; |
| 247 | ifp->if_snd.altq_ifp = ifp; |
| 248 | |
| 249 | if (!SLIST_EMPTY(&domains)) |
| 250 | if_attachdomain1(ifp); |
| 251 | |
| 252 | /* Announce the interface. */ |
| 253 | rt_ifannouncemsg(ifp, IFAN_ARRIVAL); |
| 254 | } |
| 255 | |
| 256 | static void |
| 257 | if_attachdomain(void *dummy) |
| 258 | { |
| 259 | struct ifnet *ifp; |
| 260 | int s; |
| 261 | |
| 262 | s = splnet(); |
| 263 | for (ifp = TAILQ_FIRST(&ifnet); ifp; ifp = TAILQ_NEXT(ifp, if_list)) |
| 264 | if_attachdomain1(ifp); |
| 265 | splx(s); |
| 266 | } |
| 267 | SYSINIT(domainifattach, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_FIRST, |
| 268 | if_attachdomain, NULL); |
| 269 | |
| 270 | static void |
| 271 | if_attachdomain1(struct ifnet *ifp) |
| 272 | { |
| 273 | struct domain *dp; |
| 274 | int s; |
| 275 | |
| 276 | s = splnet(); |
| 277 | |
| 278 | /* address family dependent data region */ |
| 279 | bzero(ifp->if_afdata, sizeof(ifp->if_afdata)); |
| 280 | SLIST_FOREACH(dp, &domains, dom_next) |
| 281 | if (dp->dom_ifattach) |
| 282 | ifp->if_afdata[dp->dom_family] = |
| 283 | (*dp->dom_ifattach)(ifp); |
| 284 | splx(s); |
| 285 | } |
| 286 | |
| 287 | /* |
| 288 | * Detach an interface, removing it from the |
| 289 | * list of "active" interfaces. |
| 290 | */ |
| 291 | void |
| 292 | if_detach(struct ifnet *ifp) |
| 293 | { |
| 294 | struct ifaddr *ifa; |
| 295 | struct radix_node_head *rnh; |
| 296 | int s; |
| 297 | int i; |
| 298 | struct domain *dp; |
| 299 | |
| 300 | EVENTHANDLER_INVOKE(ifnet_detach_event, ifp); |
| 301 | |
| 302 | /* |
| 303 | * Remove routes and flush queues. |
| 304 | */ |
| 305 | s = splnet(); |
| 306 | if_down(ifp); |
| 307 | |
| 308 | if (ifq_is_enabled(&ifp->if_snd)) |
| 309 | altq_disable(&ifp->if_snd); |
| 310 | if (ifq_is_attached(&ifp->if_snd)) |
| 311 | altq_detach(&ifp->if_snd); |
| 312 | |
| 313 | /* |
| 314 | * Remove address from ifnet_addrs[] and maybe decrement if_index. |
| 315 | * Clean up all addresses. |
| 316 | */ |
| 317 | ifnet_addrs[ifp->if_index - 1] = 0; |
| 318 | while (if_index > 0 && ifnet_addrs[if_index - 1] == 0) |
| 319 | if_index--; |
| 320 | |
| 321 | for (ifa = TAILQ_FIRST(&ifp->if_addrhead); ifa; |
| 322 | ifa = TAILQ_FIRST(&ifp->if_addrhead)) { |
| 323 | #ifdef INET |
| 324 | /* XXX: Ugly!! ad hoc just for INET */ |
| 325 | if (ifa->ifa_addr && ifa->ifa_addr->sa_family == AF_INET) { |
| 326 | struct ifaliasreq ifr; |
| 327 | |
| 328 | bzero(&ifr, sizeof ifr); |
| 329 | ifr.ifra_addr = *ifa->ifa_addr; |
| 330 | if (ifa->ifa_dstaddr) |
| 331 | ifr.ifra_broadaddr = *ifa->ifa_dstaddr; |
| 332 | if (in_control(NULL, SIOCDIFADDR, (caddr_t)&ifr, ifp, |
| 333 | NULL) == 0) |
| 334 | continue; |
| 335 | } |
| 336 | #endif /* INET */ |
| 337 | #ifdef INET6 |
| 338 | if (ifa->ifa_addr && ifa->ifa_addr->sa_family == AF_INET6) { |
| 339 | in6_purgeaddr(ifa); |
| 340 | /* ifp_addrhead is already updated */ |
| 341 | continue; |
| 342 | } |
| 343 | #endif /* INET6 */ |
| 344 | TAILQ_REMOVE(&ifp->if_addrhead, ifa, ifa_link); |
| 345 | IFAFREE(ifa); |
| 346 | } |
| 347 | |
| 348 | #ifdef INET6 |
| 349 | /* |
| 350 | * Remove all IPv6 kernel structs related to ifp. This should be done |
| 351 | * before removing routing entries below, since IPv6 interface direct |
| 352 | * routes are expected to be removed by the IPv6-specific kernel API. |
| 353 | * Otherwise, the kernel will detect some inconsistency and bark it. |
| 354 | */ |
| 355 | in6_ifdetach(ifp); |
| 356 | #endif |
| 357 | |
| 358 | /* |
| 359 | * Delete all remaining routes using this interface |
| 360 | * Unfortuneatly the only way to do this is to slog through |
| 361 | * the entire routing table looking for routes which point |
| 362 | * to this interface...oh well... |
| 363 | */ |
| 364 | for (i = 1; i <= AF_MAX; i++) { |
| 365 | if ((rnh = rt_tables[i]) == NULL) |
| 366 | continue; |
| 367 | rnh->rnh_walktree(rnh, if_rtdel, ifp); |
| 368 | } |
| 369 | |
| 370 | /* Announce that the interface is gone. */ |
| 371 | rt_ifannouncemsg(ifp, IFAN_DEPARTURE); |
| 372 | |
| 373 | SLIST_FOREACH(dp, &domains, dom_next) |
| 374 | if (dp->dom_ifdetach && ifp->if_afdata[dp->dom_family]) |
| 375 | (*dp->dom_ifdetach)(ifp, |
| 376 | ifp->if_afdata[dp->dom_family]); |
| 377 | |
| 378 | ifindex2ifnet[ifp->if_index] = NULL; |
| 379 | |
| 380 | TAILQ_REMOVE(&ifnet, ifp, if_link); |
| 381 | splx(s); |
| 382 | } |
| 383 | |
| 384 | /* |
| 385 | * Delete Routes for a Network Interface |
| 386 | * |
| 387 | * Called for each routing entry via the rnh->rnh_walktree() call above |
| 388 | * to delete all route entries referencing a detaching network interface. |
| 389 | * |
| 390 | * Arguments: |
| 391 | * rn pointer to node in the routing table |
| 392 | * arg argument passed to rnh->rnh_walktree() - detaching interface |
| 393 | * |
| 394 | * Returns: |
| 395 | * 0 successful |
| 396 | * errno failed - reason indicated |
| 397 | * |
| 398 | */ |
| 399 | static int |
| 400 | if_rtdel(struct radix_node *rn, void *arg) |
| 401 | { |
| 402 | struct rtentry *rt = (struct rtentry *)rn; |
| 403 | struct ifnet *ifp = arg; |
| 404 | int err; |
| 405 | |
| 406 | if (rt->rt_ifp == ifp) { |
| 407 | |
| 408 | /* |
| 409 | * Protect (sorta) against walktree recursion problems |
| 410 | * with cloned routes |
| 411 | */ |
| 412 | if (!(rt->rt_flags & RTF_UP)) |
| 413 | return (0); |
| 414 | |
| 415 | err = rtrequest(RTM_DELETE, rt_key(rt), rt->rt_gateway, |
| 416 | rt_mask(rt), rt->rt_flags, |
| 417 | (struct rtentry **) NULL); |
| 418 | if (err) { |
| 419 | log(LOG_WARNING, "if_rtdel: error %d\n", err); |
| 420 | } |
| 421 | } |
| 422 | |
| 423 | return (0); |
| 424 | } |
| 425 | |
| 426 | /* |
| 427 | * Create a clone network interface. |
| 428 | */ |
| 429 | int |
| 430 | if_clone_create(char *name, int len) |
| 431 | { |
| 432 | struct if_clone *ifc; |
| 433 | char *dp; |
| 434 | int wildcard, bytoff, bitoff; |
| 435 | int unit; |
| 436 | int err; |
| 437 | |
| 438 | ifc = if_clone_lookup(name, &unit); |
| 439 | if (ifc == NULL) |
| 440 | return (EINVAL); |
| 441 | |
| 442 | if (ifunit(name) != NULL) |
| 443 | return (EEXIST); |
| 444 | |
| 445 | bytoff = bitoff = 0; |
| 446 | wildcard = (unit < 0); |
| 447 | /* |
| 448 | * Find a free unit if none was given. |
| 449 | */ |
| 450 | if (wildcard) { |
| 451 | while (bytoff < ifc->ifc_bmlen && |
| 452 | ifc->ifc_units[bytoff] == 0xff) |
| 453 | bytoff++; |
| 454 | if (bytoff >= ifc->ifc_bmlen) |
| 455 | return (ENOSPC); |
| 456 | while ((ifc->ifc_units[bytoff] & (1 << bitoff)) != 0) |
| 457 | bitoff++; |
| 458 | unit = (bytoff << 3) + bitoff; |
| 459 | } |
| 460 | |
| 461 | if (unit > ifc->ifc_maxunit) |
| 462 | return (ENXIO); |
| 463 | |
| 464 | err = (*ifc->ifc_create)(ifc, unit); |
| 465 | if (err != 0) |
| 466 | return (err); |
| 467 | |
| 468 | if (!wildcard) { |
| 469 | bytoff = unit >> 3; |
| 470 | bitoff = unit - (bytoff << 3); |
| 471 | } |
| 472 | |
| 473 | /* |
| 474 | * Allocate the unit in the bitmap. |
| 475 | */ |
| 476 | KASSERT((ifc->ifc_units[bytoff] & (1 << bitoff)) == 0, |
| 477 | ("%s: bit is already set", __func__)); |
| 478 | ifc->ifc_units[bytoff] |= (1 << bitoff); |
| 479 | |
| 480 | /* In the wildcard case, we need to update the name. */ |
| 481 | if (wildcard) { |
| 482 | for (dp = name; *dp != '\0'; dp++); |
| 483 | if (snprintf(dp, len - (dp-name), "%d", unit) > |
| 484 | len - (dp-name) - 1) { |
| 485 | /* |
| 486 | * This can only be a programmer error and |
| 487 | * there's no straightforward way to recover if |
| 488 | * it happens. |
| 489 | */ |
| 490 | panic("if_clone_create(): interface name too long"); |
| 491 | } |
| 492 | |
| 493 | } |
| 494 | |
| 495 | EVENTHANDLER_INVOKE(if_clone_event, ifc); |
| 496 | |
| 497 | return (0); |
| 498 | } |
| 499 | |
| 500 | /* |
| 501 | * Destroy a clone network interface. |
| 502 | */ |
| 503 | int |
| 504 | if_clone_destroy(const char *name) |
| 505 | { |
| 506 | struct if_clone *ifc; |
| 507 | struct ifnet *ifp; |
| 508 | int bytoff, bitoff; |
| 509 | int unit; |
| 510 | |
| 511 | ifc = if_clone_lookup(name, &unit); |
| 512 | if (ifc == NULL) |
| 513 | return (EINVAL); |
| 514 | |
| 515 | if (unit < ifc->ifc_minifs) |
| 516 | return (EINVAL); |
| 517 | |
| 518 | ifp = ifunit(name); |
| 519 | if (ifp == NULL) |
| 520 | return (ENXIO); |
| 521 | |
| 522 | if (ifc->ifc_destroy == NULL) |
| 523 | return (EOPNOTSUPP); |
| 524 | |
| 525 | (*ifc->ifc_destroy)(ifp); |
| 526 | |
| 527 | /* |
| 528 | * Compute offset in the bitmap and deallocate the unit. |
| 529 | */ |
| 530 | bytoff = unit >> 3; |
| 531 | bitoff = unit - (bytoff << 3); |
| 532 | KASSERT((ifc->ifc_units[bytoff] & (1 << bitoff)) != 0, |
| 533 | ("%s: bit is already cleared", __func__)); |
| 534 | ifc->ifc_units[bytoff] &= ~(1 << bitoff); |
| 535 | return (0); |
| 536 | } |
| 537 | |
| 538 | /* |
| 539 | * Look up a network interface cloner. |
| 540 | */ |
| 541 | struct if_clone * |
| 542 | if_clone_lookup(const char *name, int *unitp) |
| 543 | { |
| 544 | struct if_clone *ifc; |
| 545 | const char *cp; |
| 546 | int i; |
| 547 | |
| 548 | for (ifc = LIST_FIRST(&if_cloners); ifc != NULL;) { |
| 549 | for (cp = name, i = 0; i < ifc->ifc_namelen; i++, cp++) { |
| 550 | if (ifc->ifc_name[i] != *cp) |
| 551 | goto next_ifc; |
| 552 | } |
| 553 | goto found_name; |
| 554 | next_ifc: |
| 555 | ifc = LIST_NEXT(ifc, ifc_list); |
| 556 | } |
| 557 | |
| 558 | /* No match. */ |
| 559 | return ((struct if_clone *)NULL); |
| 560 | |
| 561 | found_name: |
| 562 | if (*cp == '\0') { |
| 563 | i = -1; |
| 564 | } else { |
| 565 | for (i = 0; *cp != '\0'; cp++) { |
| 566 | if (*cp < '0' || *cp > '9') { |
| 567 | /* Bogus unit number. */ |
| 568 | return (NULL); |
| 569 | } |
| 570 | i = (i * 10) + (*cp - '0'); |
| 571 | } |
| 572 | } |
| 573 | |
| 574 | if (unitp != NULL) |
| 575 | *unitp = i; |
| 576 | return (ifc); |
| 577 | } |
| 578 | |
| 579 | /* |
| 580 | * Register a network interface cloner. |
| 581 | */ |
| 582 | void |
| 583 | if_clone_attach(struct if_clone *ifc) |
| 584 | { |
| 585 | int bytoff, bitoff; |
| 586 | int err; |
| 587 | int len, maxclone; |
| 588 | int unit; |
| 589 | |
| 590 | KASSERT(ifc->ifc_minifs - 1 <= ifc->ifc_maxunit, |
| 591 | ("%s: %s requested more units then allowed (%d > %d)", |
| 592 | __func__, ifc->ifc_name, ifc->ifc_minifs, |
| 593 | ifc->ifc_maxunit + 1)); |
| 594 | /* |
| 595 | * Compute bitmap size and allocate it. |
| 596 | */ |
| 597 | maxclone = ifc->ifc_maxunit + 1; |
| 598 | len = maxclone >> 3; |
| 599 | if ((len << 3) < maxclone) |
| 600 | len++; |
| 601 | ifc->ifc_units = malloc(len, M_CLONE, M_WAITOK | M_ZERO); |
| 602 | ifc->ifc_bmlen = len; |
| 603 | |
| 604 | LIST_INSERT_HEAD(&if_cloners, ifc, ifc_list); |
| 605 | if_cloners_count++; |
| 606 | |
| 607 | for (unit = 0; unit < ifc->ifc_minifs; unit++) { |
| 608 | err = (*ifc->ifc_create)(ifc, unit); |
| 609 | KASSERT(err == 0, |
| 610 | ("%s: failed to create required interface %s%d", |
| 611 | __func__, ifc->ifc_name, unit)); |
| 612 | |
| 613 | /* Allocate the unit in the bitmap. */ |
| 614 | bytoff = unit >> 3; |
| 615 | bitoff = unit - (bytoff << 3); |
| 616 | ifc->ifc_units[bytoff] |= (1 << bitoff); |
| 617 | } |
| 618 | } |
| 619 | |
| 620 | /* |
| 621 | * Unregister a network interface cloner. |
| 622 | */ |
| 623 | void |
| 624 | if_clone_detach(struct if_clone *ifc) |
| 625 | { |
| 626 | |
| 627 | LIST_REMOVE(ifc, ifc_list); |
| 628 | free(ifc->ifc_units, M_CLONE); |
| 629 | if_cloners_count--; |
| 630 | } |
| 631 | |
| 632 | /* |
| 633 | * Provide list of interface cloners to userspace. |
| 634 | */ |
| 635 | int |
| 636 | if_clone_list(struct if_clonereq *ifcr) |
| 637 | { |
| 638 | char outbuf[IFNAMSIZ], *dst; |
| 639 | struct if_clone *ifc; |
| 640 | int count, error = 0; |
| 641 | |
| 642 | ifcr->ifcr_total = if_cloners_count; |
| 643 | if ((dst = ifcr->ifcr_buffer) == NULL) { |
| 644 | /* Just asking how many there are. */ |
| 645 | return (0); |
| 646 | } |
| 647 | |
| 648 | if (ifcr->ifcr_count < 0) |
| 649 | return (EINVAL); |
| 650 | |
| 651 | count = (if_cloners_count < ifcr->ifcr_count) ? |
| 652 | if_cloners_count : ifcr->ifcr_count; |
| 653 | |
| 654 | for (ifc = LIST_FIRST(&if_cloners); ifc != NULL && count != 0; |
| 655 | ifc = LIST_NEXT(ifc, ifc_list), count--, dst += IFNAMSIZ) { |
| 656 | strlcpy(outbuf, ifc->ifc_name, IFNAMSIZ); |
| 657 | error = copyout(outbuf, dst, IFNAMSIZ); |
| 658 | if (error) |
| 659 | break; |
| 660 | } |
| 661 | |
| 662 | return (error); |
| 663 | } |
| 664 | |
| 665 | /* |
| 666 | * Locate an interface based on a complete address. |
| 667 | */ |
| 668 | struct ifaddr * |
| 669 | ifa_ifwithaddr(struct sockaddr *addr) |
| 670 | { |
| 671 | struct ifnet *ifp; |
| 672 | struct ifaddr *ifa; |
| 673 | |
| 674 | TAILQ_FOREACH(ifp, &ifnet, if_link) |
| 675 | TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { |
| 676 | if (ifa->ifa_addr->sa_family != addr->sa_family) |
| 677 | continue; |
| 678 | if (sa_equal(addr, ifa->ifa_addr)) |
| 679 | return (ifa); |
| 680 | if ((ifp->if_flags & IFF_BROADCAST) && ifa->ifa_broadaddr && |
| 681 | /* IPv6 doesn't have broadcast */ |
| 682 | ifa->ifa_broadaddr->sa_len != 0 && |
| 683 | sa_equal(ifa->ifa_broadaddr, addr)) |
| 684 | return (ifa); |
| 685 | } |
| 686 | return ((struct ifaddr *)NULL); |
| 687 | } |
| 688 | /* |
| 689 | * Locate the point to point interface with a given destination address. |
| 690 | */ |
| 691 | struct ifaddr * |
| 692 | ifa_ifwithdstaddr(struct sockaddr *addr) |
| 693 | { |
| 694 | struct ifnet *ifp; |
| 695 | struct ifaddr *ifa; |
| 696 | |
| 697 | TAILQ_FOREACH(ifp, &ifnet, if_link) |
| 698 | if (ifp->if_flags & IFF_POINTOPOINT) |
| 699 | TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { |
| 700 | if (ifa->ifa_addr->sa_family != addr->sa_family) |
| 701 | continue; |
| 702 | if (ifa->ifa_dstaddr && |
| 703 | sa_equal(addr, ifa->ifa_dstaddr)) |
| 704 | return (ifa); |
| 705 | } |
| 706 | return ((struct ifaddr *)NULL); |
| 707 | } |
| 708 | |
| 709 | /* |
| 710 | * Find an interface on a specific network. If many, choice |
| 711 | * is most specific found. |
| 712 | */ |
| 713 | struct ifaddr * |
| 714 | ifa_ifwithnet(struct sockaddr *addr) |
| 715 | { |
| 716 | struct ifnet *ifp; |
| 717 | struct ifaddr *ifa; |
| 718 | struct ifaddr *ifa_maybe = (struct ifaddr *) 0; |
| 719 | u_int af = addr->sa_family; |
| 720 | char *addr_data = addr->sa_data, *cplim; |
| 721 | |
| 722 | /* |
| 723 | * AF_LINK addresses can be looked up directly by their index number, |
| 724 | * so do that if we can. |
| 725 | */ |
| 726 | if (af == AF_LINK) { |
| 727 | struct sockaddr_dl *sdl = (struct sockaddr_dl *)addr; |
| 728 | |
| 729 | if (sdl->sdl_index && sdl->sdl_index <= if_index) |
| 730 | return (ifnet_addrs[sdl->sdl_index - 1]); |
| 731 | } |
| 732 | |
| 733 | /* |
| 734 | * Scan though each interface, looking for ones that have |
| 735 | * addresses in this address family. |
| 736 | */ |
| 737 | TAILQ_FOREACH(ifp, &ifnet, if_link) { |
| 738 | TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { |
| 739 | char *cp, *cp2, *cp3; |
| 740 | |
| 741 | if (ifa->ifa_addr->sa_family != af) |
| 742 | next: continue; |
| 743 | if (af == AF_INET && ifp->if_flags & IFF_POINTOPOINT) { |
| 744 | /* |
| 745 | * This is a bit broken as it doesn't |
| 746 | * take into account that the remote end may |
| 747 | * be a single node in the network we are |
| 748 | * looking for. |
| 749 | * The trouble is that we don't know the |
| 750 | * netmask for the remote end. |
| 751 | */ |
| 752 | if (ifa->ifa_dstaddr != NULL && |
| 753 | sa_equal(addr, ifa->ifa_dstaddr)) |
| 754 | return (ifa); |
| 755 | } else { |
| 756 | /* |
| 757 | * if we have a special address handler, |
| 758 | * then use it instead of the generic one. |
| 759 | */ |
| 760 | if (ifa->ifa_claim_addr) { |
| 761 | if ((*ifa->ifa_claim_addr)(ifa, addr)) { |
| 762 | return (ifa); |
| 763 | } else { |
| 764 | continue; |
| 765 | } |
| 766 | } |
| 767 | |
| 768 | /* |
| 769 | * Scan all the bits in the ifa's address. |
| 770 | * If a bit dissagrees with what we are |
| 771 | * looking for, mask it with the netmask |
| 772 | * to see if it really matters. |
| 773 | * (A byte at a time) |
| 774 | */ |
| 775 | if (ifa->ifa_netmask == 0) |
| 776 | continue; |
| 777 | cp = addr_data; |
| 778 | cp2 = ifa->ifa_addr->sa_data; |
| 779 | cp3 = ifa->ifa_netmask->sa_data; |
| 780 | cplim = ifa->ifa_netmask->sa_len + |
| 781 | (char *)ifa->ifa_netmask; |
| 782 | while (cp3 < cplim) |
| 783 | if ((*cp++ ^ *cp2++) & *cp3++) |
| 784 | goto next; /* next address! */ |
| 785 | /* |
| 786 | * If the netmask of what we just found |
| 787 | * is more specific than what we had before |
| 788 | * (if we had one) then remember the new one |
| 789 | * before continuing to search |
| 790 | * for an even better one. |
| 791 | */ |
| 792 | if (ifa_maybe == 0 || |
| 793 | rn_refines((char *)ifa->ifa_netmask, |
| 794 | (char *)ifa_maybe->ifa_netmask)) |
| 795 | ifa_maybe = ifa; |
| 796 | } |
| 797 | } |
| 798 | } |
| 799 | return (ifa_maybe); |
| 800 | } |
| 801 | |
| 802 | /* |
| 803 | * Find an interface address specific to an interface best matching |
| 804 | * a given address. |
| 805 | */ |
| 806 | struct ifaddr * |
| 807 | ifaof_ifpforaddr(struct sockaddr *addr, struct ifnet *ifp) |
| 808 | { |
| 809 | struct ifaddr *ifa; |
| 810 | char *cp, *cp2, *cp3; |
| 811 | char *cplim; |
| 812 | struct ifaddr *ifa_maybe = 0; |
| 813 | u_int af = addr->sa_family; |
| 814 | |
| 815 | if (af >= AF_MAX) |
| 816 | return (0); |
| 817 | TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { |
| 818 | if (ifa->ifa_addr->sa_family != af) |
| 819 | continue; |
| 820 | if (ifa_maybe == 0) |
| 821 | ifa_maybe = ifa; |
| 822 | if (ifa->ifa_netmask == NULL) { |
| 823 | if (sa_equal(addr, ifa->ifa_addr) || |
| 824 | (ifa->ifa_dstaddr != NULL && |
| 825 | sa_equal(addr, ifa->ifa_dstaddr))) |
| 826 | return (ifa); |
| 827 | continue; |
| 828 | } |
| 829 | if (ifp->if_flags & IFF_POINTOPOINT) { |
| 830 | if (sa_equal(addr, ifa->ifa_dstaddr)) |
| 831 | return (ifa); |
| 832 | } else { |
| 833 | cp = addr->sa_data; |
| 834 | cp2 = ifa->ifa_addr->sa_data; |
| 835 | cp3 = ifa->ifa_netmask->sa_data; |
| 836 | cplim = ifa->ifa_netmask->sa_len + (char *)ifa->ifa_netmask; |
| 837 | for (; cp3 < cplim; cp3++) |
| 838 | if ((*cp++ ^ *cp2++) & *cp3) |
| 839 | break; |
| 840 | if (cp3 == cplim) |
| 841 | return (ifa); |
| 842 | } |
| 843 | } |
| 844 | return (ifa_maybe); |
| 845 | } |
| 846 | |
| 847 | #include <net/route.h> |
| 848 | |
| 849 | /* |
| 850 | * Default action when installing a route with a Link Level gateway. |
| 851 | * Lookup an appropriate real ifa to point to. |
| 852 | * This should be moved to /sys/net/link.c eventually. |
| 853 | */ |
| 854 | static void |
| 855 | link_rtrequest(int cmd, struct rtentry *rt, struct rt_addrinfo *info) |
| 856 | { |
| 857 | struct ifaddr *ifa; |
| 858 | struct sockaddr *dst; |
| 859 | struct ifnet *ifp; |
| 860 | |
| 861 | if (cmd != RTM_ADD || (ifa = rt->rt_ifa) == NULL || |
| 862 | (ifp = ifa->ifa_ifp) == NULL || (dst = rt_key(rt)) == NULL) |
| 863 | return; |
| 864 | ifa = ifaof_ifpforaddr(dst, ifp); |
| 865 | if (ifa != NULL) { |
| 866 | IFAFREE(rt->rt_ifa); |
| 867 | IFAREF(ifa); |
| 868 | rt->rt_ifa = ifa; |
| 869 | if (ifa->ifa_rtrequest && ifa->ifa_rtrequest != link_rtrequest) |
| 870 | ifa->ifa_rtrequest(cmd, rt, info); |
| 871 | } |
| 872 | } |
| 873 | |
| 874 | /* |
| 875 | * Mark an interface down and notify protocols of |
| 876 | * the transition. |
| 877 | * NOTE: must be called at splnet or eqivalent. |
| 878 | */ |
| 879 | void |
| 880 | if_unroute(struct ifnet *ifp, int flag, int fam) |
| 881 | { |
| 882 | struct ifaddr *ifa; |
| 883 | |
| 884 | ifp->if_flags &= ~flag; |
| 885 | getmicrotime(&ifp->if_lastchange); |
| 886 | TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) |
| 887 | if (fam == PF_UNSPEC || (fam == ifa->ifa_addr->sa_family)) |
| 888 | pfctlinput(PRC_IFDOWN, ifa->ifa_addr); |
| 889 | ifq_purge(&ifp->if_snd); |
| 890 | rt_ifmsg(ifp); |
| 891 | } |
| 892 | |
| 893 | /* |
| 894 | * Mark an interface up and notify protocols of |
| 895 | * the transition. |
| 896 | * NOTE: must be called at splnet or eqivalent. |
| 897 | */ |
| 898 | void |
| 899 | if_route(struct ifnet *ifp, int flag, int fam) |
| 900 | { |
| 901 | struct ifaddr *ifa; |
| 902 | |
| 903 | ifp->if_flags |= flag; |
| 904 | getmicrotime(&ifp->if_lastchange); |
| 905 | TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) |
| 906 | if (fam == PF_UNSPEC || (fam == ifa->ifa_addr->sa_family)) |
| 907 | pfctlinput(PRC_IFUP, ifa->ifa_addr); |
| 908 | rt_ifmsg(ifp); |
| 909 | #ifdef INET6 |
| 910 | in6_if_up(ifp); |
| 911 | #endif |
| 912 | } |
| 913 | |
| 914 | /* |
| 915 | * Mark an interface down and notify protocols of the transition. An |
| 916 | * interface going down is also considered to be a synchronizing event. |
| 917 | * We must ensure that all packet processing related to the interface |
| 918 | * has completed before we return so e.g. the caller can free the ifnet |
| 919 | * structure that the mbufs may be referencing. |
| 920 | * |
| 921 | * NOTE: must be called at splnet or eqivalent. |
| 922 | */ |
| 923 | void |
| 924 | if_down(struct ifnet *ifp) |
| 925 | { |
| 926 | |
| 927 | if_unroute(ifp, IFF_UP, AF_UNSPEC); |
| 928 | netmsg_service_sync(); |
| 929 | } |
| 930 | |
| 931 | /* |
| 932 | * Mark an interface up and notify protocols of |
| 933 | * the transition. |
| 934 | * NOTE: must be called at splnet or eqivalent. |
| 935 | */ |
| 936 | void |
| 937 | if_up(struct ifnet *ifp) |
| 938 | { |
| 939 | |
| 940 | if_route(ifp, IFF_UP, AF_UNSPEC); |
| 941 | } |
| 942 | |
| 943 | /* |
| 944 | * Handle interface watchdog timer routines. Called |
| 945 | * from softclock, we decrement timers (if set) and |
| 946 | * call the appropriate interface routine on expiration. |
| 947 | */ |
| 948 | static void |
| 949 | if_slowtimo(void *arg) |
| 950 | { |
| 951 | struct ifnet *ifp; |
| 952 | int s = splimp(); |
| 953 | |
| 954 | TAILQ_FOREACH(ifp, &ifnet, if_link) { |
| 955 | if (ifp->if_timer == 0 || --ifp->if_timer) |
| 956 | continue; |
| 957 | if (ifp->if_watchdog) |
| 958 | (*ifp->if_watchdog)(ifp); |
| 959 | } |
| 960 | splx(s); |
| 961 | callout_reset(&if_slowtimo_timer, hz / IFNET_SLOWHZ, if_slowtimo, NULL); |
| 962 | } |
| 963 | |
| 964 | /* |
| 965 | * Map interface name to |
| 966 | * interface structure pointer. |
| 967 | */ |
| 968 | struct ifnet * |
| 969 | ifunit(const char *name) |
| 970 | { |
| 971 | struct ifnet *ifp; |
| 972 | |
| 973 | /* |
| 974 | * Search all the interfaces for this name/number |
| 975 | */ |
| 976 | |
| 977 | TAILQ_FOREACH(ifp, &ifnet, if_link) { |
| 978 | if (strncmp(ifp->if_xname, name, IFNAMSIZ) == 0) |
| 979 | break; |
| 980 | } |
| 981 | return (ifp); |
| 982 | } |
| 983 | |
| 984 | |
| 985 | /* |
| 986 | * Map interface name in a sockaddr_dl to |
| 987 | * interface structure pointer. |
| 988 | */ |
| 989 | struct ifnet * |
| 990 | if_withname(struct sockaddr *sa) |
| 991 | { |
| 992 | char ifname[IFNAMSIZ+1]; |
| 993 | struct sockaddr_dl *sdl = (struct sockaddr_dl *)sa; |
| 994 | |
| 995 | if ( (sa->sa_family != AF_LINK) || (sdl->sdl_nlen == 0) || |
| 996 | (sdl->sdl_nlen > IFNAMSIZ) ) |
| 997 | return NULL; |
| 998 | |
| 999 | /* |
| 1000 | * ifunit wants a null-terminated name. It may not be null-terminated |
| 1001 | * in the sockaddr. We don't want to change the caller's sockaddr, |
| 1002 | * and there might not be room to put the trailing null anyway, so we |
| 1003 | * make a local copy that we know we can null terminate safely. |
| 1004 | */ |
| 1005 | |
| 1006 | bcopy(sdl->sdl_data, ifname, sdl->sdl_nlen); |
| 1007 | ifname[sdl->sdl_nlen] = '\0'; |
| 1008 | return ifunit(ifname); |
| 1009 | } |
| 1010 | |
| 1011 | |
| 1012 | /* |
| 1013 | * Interface ioctls. |
| 1014 | */ |
| 1015 | int |
| 1016 | ifioctl(struct socket *so, u_long cmd, caddr_t data, struct thread *td) |
| 1017 | { |
| 1018 | struct ifnet *ifp; |
| 1019 | struct ifreq *ifr; |
| 1020 | struct ifstat *ifs; |
| 1021 | int error; |
| 1022 | short oif_flags; |
| 1023 | int new_flags; |
| 1024 | size_t namelen, onamelen; |
| 1025 | char new_name[IFNAMSIZ]; |
| 1026 | struct ifaddr *ifa; |
| 1027 | struct sockaddr_dl *sdl; |
| 1028 | |
| 1029 | switch (cmd) { |
| 1030 | |
| 1031 | case SIOCGIFCONF: |
| 1032 | case OSIOCGIFCONF: |
| 1033 | return (ifconf(cmd, data, td)); |
| 1034 | } |
| 1035 | ifr = (struct ifreq *)data; |
| 1036 | |
| 1037 | switch (cmd) { |
| 1038 | case SIOCIFCREATE: |
| 1039 | case SIOCIFDESTROY: |
| 1040 | if ((error = suser(td)) != 0) |
| 1041 | return (error); |
| 1042 | return ((cmd == SIOCIFCREATE) ? |
| 1043 | if_clone_create(ifr->ifr_name, sizeof(ifr->ifr_name)) : |
| 1044 | if_clone_destroy(ifr->ifr_name)); |
| 1045 | |
| 1046 | case SIOCIFGCLONERS: |
| 1047 | return (if_clone_list((struct if_clonereq *)data)); |
| 1048 | } |
| 1049 | |
| 1050 | ifp = ifunit(ifr->ifr_name); |
| 1051 | if (ifp == 0) |
| 1052 | return (ENXIO); |
| 1053 | switch (cmd) { |
| 1054 | |
| 1055 | case SIOCGIFFLAGS: |
| 1056 | ifr->ifr_flags = ifp->if_flags; |
| 1057 | ifr->ifr_flagshigh = ifp->if_flags >> 16; |
| 1058 | break; |
| 1059 | |
| 1060 | case SIOCGIFCAP: |
| 1061 | ifr->ifr_reqcap = ifp->if_capabilities; |
| 1062 | ifr->ifr_curcap = ifp->if_capenable; |
| 1063 | break; |
| 1064 | |
| 1065 | case SIOCGIFMETRIC: |
| 1066 | ifr->ifr_metric = ifp->if_metric; |
| 1067 | break; |
| 1068 | |
| 1069 | case SIOCGIFMTU: |
| 1070 | ifr->ifr_mtu = ifp->if_mtu; |
| 1071 | break; |
| 1072 | |
| 1073 | case SIOCGIFPHYS: |
| 1074 | ifr->ifr_phys = ifp->if_physical; |
| 1075 | break; |
| 1076 | |
| 1077 | case SIOCSIFFLAGS: |
| 1078 | error = suser(td); |
| 1079 | if (error) |
| 1080 | return (error); |
| 1081 | new_flags = (ifr->ifr_flags & 0xffff) | |
| 1082 | (ifr->ifr_flagshigh << 16); |
| 1083 | if (ifp->if_flags & IFF_SMART) { |
| 1084 | /* Smart drivers twiddle their own routes */ |
| 1085 | } else if (ifp->if_flags & IFF_UP && |
| 1086 | (new_flags & IFF_UP) == 0) { |
| 1087 | int s = splimp(); |
| 1088 | if_down(ifp); |
| 1089 | splx(s); |
| 1090 | } else if (new_flags & IFF_UP && |
| 1091 | (ifp->if_flags & IFF_UP) == 0) { |
| 1092 | int s = splimp(); |
| 1093 | if_up(ifp); |
| 1094 | splx(s); |
| 1095 | } |
| 1096 | ifp->if_flags = (ifp->if_flags & IFF_CANTCHANGE) | |
| 1097 | (new_flags &~ IFF_CANTCHANGE); |
| 1098 | if (new_flags & IFF_PPROMISC) { |
| 1099 | /* Permanently promiscuous mode requested */ |
| 1100 | ifp->if_flags |= IFF_PROMISC; |
| 1101 | } else if (ifp->if_pcount == 0) { |
| 1102 | ifp->if_flags &= ~IFF_PROMISC; |
| 1103 | } |
| 1104 | if (ifp->if_ioctl) |
| 1105 | (*ifp->if_ioctl)(ifp, cmd, data, td->td_proc->p_ucred); |
| 1106 | getmicrotime(&ifp->if_lastchange); |
| 1107 | break; |
| 1108 | |
| 1109 | case SIOCSIFCAP: |
| 1110 | error = suser(td); |
| 1111 | if (error) |
| 1112 | return (error); |
| 1113 | if (ifr->ifr_reqcap & ~ifp->if_capabilities) |
| 1114 | return (EINVAL); |
| 1115 | (*ifp->if_ioctl)(ifp, cmd, data, td->td_proc->p_ucred); |
| 1116 | break; |
| 1117 | |
| 1118 | case SIOCSIFNAME: |
| 1119 | error = suser(td); |
| 1120 | if (error != 0) |
| 1121 | return (error); |
| 1122 | error = copyinstr(ifr->ifr_data, new_name, IFNAMSIZ, NULL); |
| 1123 | if (error != 0) |
| 1124 | return (error); |
| 1125 | if (new_name[0] == '\0') |
| 1126 | return (EINVAL); |
| 1127 | if (ifunit(new_name) != NULL) |
| 1128 | return (EEXIST); |
| 1129 | |
| 1130 | EVENTHANDLER_INVOKE(ifnet_detach_event, ifp); |
| 1131 | |
| 1132 | /* Announce the departure of the interface. */ |
| 1133 | rt_ifannouncemsg(ifp, IFAN_DEPARTURE); |
| 1134 | |
| 1135 | strlcpy(ifp->if_xname, new_name, sizeof(ifp->if_xname)); |
| 1136 | ifa = TAILQ_FIRST(&ifp->if_addrhead); |
| 1137 | /* XXX IFA_LOCK(ifa); */ |
| 1138 | sdl = (struct sockaddr_dl *)ifa->ifa_addr; |
| 1139 | namelen = strlen(new_name); |
| 1140 | onamelen = sdl->sdl_nlen; |
| 1141 | /* |
| 1142 | * Move the address if needed. This is safe because we |
| 1143 | * allocate space for a name of length IFNAMSIZ when we |
| 1144 | * create this in if_attach(). |
| 1145 | */ |
| 1146 | if (namelen != onamelen) { |
| 1147 | bcopy(sdl->sdl_data + onamelen, |
| 1148 | sdl->sdl_data + namelen, sdl->sdl_alen); |
| 1149 | } |
| 1150 | bcopy(new_name, sdl->sdl_data, namelen); |
| 1151 | sdl->sdl_nlen = namelen; |
| 1152 | sdl = (struct sockaddr_dl *)ifa->ifa_netmask; |
| 1153 | bzero(sdl->sdl_data, onamelen); |
| 1154 | while (namelen != 0) |
| 1155 | sdl->sdl_data[--namelen] = 0xff; |
| 1156 | /* XXX IFA_UNLOCK(ifa) */ |
| 1157 | |
| 1158 | EVENTHANDLER_INVOKE(ifnet_attach_event, ifp); |
| 1159 | |
| 1160 | /* Announce the return of the interface. */ |
| 1161 | rt_ifannouncemsg(ifp, IFAN_ARRIVAL); |
| 1162 | break; |
| 1163 | |
| 1164 | case SIOCSIFMETRIC: |
| 1165 | error = suser(td); |
| 1166 | if (error) |
| 1167 | return (error); |
| 1168 | ifp->if_metric = ifr->ifr_metric; |
| 1169 | getmicrotime(&ifp->if_lastchange); |
| 1170 | break; |
| 1171 | |
| 1172 | case SIOCSIFPHYS: |
| 1173 | error = suser(td); |
| 1174 | if (error) |
| 1175 | return error; |
| 1176 | if (!ifp->if_ioctl) |
| 1177 | return EOPNOTSUPP; |
| 1178 | error = (*ifp->if_ioctl)(ifp, cmd, data, td->td_proc->p_ucred); |
| 1179 | if (error == 0) |
| 1180 | getmicrotime(&ifp->if_lastchange); |
| 1181 | return (error); |
| 1182 | |
| 1183 | case SIOCSIFMTU: |
| 1184 | { |
| 1185 | u_long oldmtu = ifp->if_mtu; |
| 1186 | |
| 1187 | error = suser(td); |
| 1188 | if (error) |
| 1189 | return (error); |
| 1190 | if (ifp->if_ioctl == NULL) |
| 1191 | return (EOPNOTSUPP); |
| 1192 | if (ifr->ifr_mtu < IF_MINMTU || ifr->ifr_mtu > IF_MAXMTU) |
| 1193 | return (EINVAL); |
| 1194 | error = (*ifp->if_ioctl)(ifp, cmd, data, td->td_proc->p_ucred); |
| 1195 | if (error == 0) { |
| 1196 | getmicrotime(&ifp->if_lastchange); |
| 1197 | rt_ifmsg(ifp); |
| 1198 | } |
| 1199 | /* |
| 1200 | * If the link MTU changed, do network layer specific procedure. |
| 1201 | */ |
| 1202 | if (ifp->if_mtu != oldmtu) { |
| 1203 | #ifdef INET6 |
| 1204 | nd6_setmtu(ifp); |
| 1205 | #endif |
| 1206 | } |
| 1207 | return (error); |
| 1208 | } |
| 1209 | |
| 1210 | case SIOCADDMULTI: |
| 1211 | case SIOCDELMULTI: |
| 1212 | error = suser(td); |
| 1213 | if (error) |
| 1214 | return (error); |
| 1215 | |
| 1216 | /* Don't allow group membership on non-multicast interfaces. */ |
| 1217 | if ((ifp->if_flags & IFF_MULTICAST) == 0) |
| 1218 | return EOPNOTSUPP; |
| 1219 | |
| 1220 | /* Don't let users screw up protocols' entries. */ |
| 1221 | if (ifr->ifr_addr.sa_family != AF_LINK) |
| 1222 | return EINVAL; |
| 1223 | |
| 1224 | if (cmd == SIOCADDMULTI) { |
| 1225 | struct ifmultiaddr *ifma; |
| 1226 | error = if_addmulti(ifp, &ifr->ifr_addr, &ifma); |
| 1227 | } else { |
| 1228 | error = if_delmulti(ifp, &ifr->ifr_addr); |
| 1229 | } |
| 1230 | if (error == 0) |
| 1231 | getmicrotime(&ifp->if_lastchange); |
| 1232 | return error; |
| 1233 | |
| 1234 | case SIOCSIFPHYADDR: |
| 1235 | case SIOCDIFPHYADDR: |
| 1236 | #ifdef INET6 |
| 1237 | case SIOCSIFPHYADDR_IN6: |
| 1238 | #endif |
| 1239 | case SIOCSLIFPHYADDR: |
| 1240 | case SIOCSIFMEDIA: |
| 1241 | case SIOCSIFGENERIC: |
| 1242 | error = suser(td); |
| 1243 | if (error) |
| 1244 | return (error); |
| 1245 | if (ifp->if_ioctl == 0) |
| 1246 | return (EOPNOTSUPP); |
| 1247 | error = (*ifp->if_ioctl)(ifp, cmd, data, td->td_proc->p_ucred); |
| 1248 | if (error == 0) |
| 1249 | getmicrotime(&ifp->if_lastchange); |
| 1250 | return error; |
| 1251 | |
| 1252 | case SIOCGIFSTATUS: |
| 1253 | ifs = (struct ifstat *)data; |
| 1254 | ifs->ascii[0] = '\0'; |
| 1255 | |
| 1256 | case SIOCGIFPSRCADDR: |
| 1257 | case SIOCGIFPDSTADDR: |
| 1258 | case SIOCGLIFPHYADDR: |
| 1259 | case SIOCGIFMEDIA: |
| 1260 | case SIOCGIFGENERIC: |
| 1261 | if (ifp->if_ioctl == 0) |
| 1262 | return (EOPNOTSUPP); |
| 1263 | return ((*ifp->if_ioctl)(ifp, cmd, data, td->td_proc->p_ucred)); |
| 1264 | |
| 1265 | case SIOCSIFLLADDR: |
| 1266 | error = suser(td); |
| 1267 | if (error) |
| 1268 | return (error); |
| 1269 | return if_setlladdr(ifp, |
| 1270 | ifr->ifr_addr.sa_data, ifr->ifr_addr.sa_len); |
| 1271 | |
| 1272 | default: |
| 1273 | oif_flags = ifp->if_flags; |
| 1274 | if (so->so_proto == 0) |
| 1275 | return (EOPNOTSUPP); |
| 1276 | #ifndef COMPAT_43 |
| 1277 | error = so_pru_control(so, cmd, data, ifp, td); |
| 1278 | #else |
| 1279 | { |
| 1280 | int ocmd = cmd; |
| 1281 | |
| 1282 | switch (cmd) { |
| 1283 | |
| 1284 | case SIOCSIFDSTADDR: |
| 1285 | case SIOCSIFADDR: |
| 1286 | case SIOCSIFBRDADDR: |
| 1287 | case SIOCSIFNETMASK: |
| 1288 | #if BYTE_ORDER != BIG_ENDIAN |
| 1289 | if (ifr->ifr_addr.sa_family == 0 && |
| 1290 | ifr->ifr_addr.sa_len < 16) { |
| 1291 | ifr->ifr_addr.sa_family = ifr->ifr_addr.sa_len; |
| 1292 | ifr->ifr_addr.sa_len = 16; |
| 1293 | } |
| 1294 | #else |
| 1295 | if (ifr->ifr_addr.sa_len == 0) |
| 1296 | ifr->ifr_addr.sa_len = 16; |
| 1297 | #endif |
| 1298 | break; |
| 1299 | |
| 1300 | case OSIOCGIFADDR: |
| 1301 | cmd = SIOCGIFADDR; |
| 1302 | break; |
| 1303 | |
| 1304 | case OSIOCGIFDSTADDR: |
| 1305 | cmd = SIOCGIFDSTADDR; |
| 1306 | break; |
| 1307 | |
| 1308 | case OSIOCGIFBRDADDR: |
| 1309 | cmd = SIOCGIFBRDADDR; |
| 1310 | break; |
| 1311 | |
| 1312 | case OSIOCGIFNETMASK: |
| 1313 | cmd = SIOCGIFNETMASK; |
| 1314 | } |
| 1315 | error = so_pru_control(so, cmd, data, ifp, td); |
| 1316 | switch (ocmd) { |
| 1317 | |
| 1318 | case OSIOCGIFADDR: |
| 1319 | case OSIOCGIFDSTADDR: |
| 1320 | case OSIOCGIFBRDADDR: |
| 1321 | case OSIOCGIFNETMASK: |
| 1322 | *(u_short *)&ifr->ifr_addr = ifr->ifr_addr.sa_family; |
| 1323 | |
| 1324 | } |
| 1325 | } |
| 1326 | #endif /* COMPAT_43 */ |
| 1327 | |
| 1328 | if ((oif_flags ^ ifp->if_flags) & IFF_UP) { |
| 1329 | #ifdef INET6 |
| 1330 | DELAY(100);/* XXX: temporary workaround for fxp issue*/ |
| 1331 | if (ifp->if_flags & IFF_UP) { |
| 1332 | int s = splimp(); |
| 1333 | in6_if_up(ifp); |
| 1334 | splx(s); |
| 1335 | } |
| 1336 | #endif |
| 1337 | } |
| 1338 | return (error); |
| 1339 | |
| 1340 | } |
| 1341 | return (0); |
| 1342 | } |
| 1343 | |
| 1344 | /* |
| 1345 | * Set/clear promiscuous mode on interface ifp based on the truth value |
| 1346 | * of pswitch. The calls are reference counted so that only the first |
| 1347 | * "on" request actually has an effect, as does the final "off" request. |
| 1348 | * Results are undefined if the "off" and "on" requests are not matched. |
| 1349 | */ |
| 1350 | int |
| 1351 | ifpromisc(struct ifnet *ifp, int pswitch) |
| 1352 | { |
| 1353 | struct ifreq ifr; |
| 1354 | int error; |
| 1355 | int oldflags; |
| 1356 | |
| 1357 | oldflags = ifp->if_flags; |
| 1358 | if (ifp->if_flags & IFF_PPROMISC) { |
| 1359 | /* Do nothing if device is in permanently promiscuous mode */ |
| 1360 | ifp->if_pcount += pswitch ? 1 : -1; |
| 1361 | return (0); |
| 1362 | } |
| 1363 | if (pswitch) { |
| 1364 | /* |
| 1365 | * If the device is not configured up, we cannot put it in |
| 1366 | * promiscuous mode. |
| 1367 | */ |
| 1368 | if ((ifp->if_flags & IFF_UP) == 0) |
| 1369 | return (ENETDOWN); |
| 1370 | if (ifp->if_pcount++ != 0) |
| 1371 | return (0); |
| 1372 | ifp->if_flags |= IFF_PROMISC; |
| 1373 | log(LOG_INFO, "%s: promiscuous mode enabled\n", |
| 1374 | ifp->if_xname); |
| 1375 | } else { |
| 1376 | if (--ifp->if_pcount > 0) |
| 1377 | return (0); |
| 1378 | ifp->if_flags &= ~IFF_PROMISC; |
| 1379 | log(LOG_INFO, "%s: promiscuous mode disabled\n", |
| 1380 | ifp->if_xname); |
| 1381 | } |
| 1382 | ifr.ifr_flags = ifp->if_flags; |
| 1383 | ifr.ifr_flagshigh = ifp->if_flags >> 16; |
| 1384 | error = (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr, |
| 1385 | (struct ucred *)NULL); |
| 1386 | if (error == 0) |
| 1387 | rt_ifmsg(ifp); |
| 1388 | else |
| 1389 | ifp->if_flags = oldflags; |
| 1390 | return error; |
| 1391 | } |
| 1392 | |
| 1393 | /* |
| 1394 | * Return interface configuration |
| 1395 | * of system. List may be used |
| 1396 | * in later ioctl's (above) to get |
| 1397 | * other information. |
| 1398 | */ |
| 1399 | static int |
| 1400 | ifconf(u_long cmd, caddr_t data, struct thread *td) |
| 1401 | { |
| 1402 | struct ifconf *ifc = (struct ifconf *)data; |
| 1403 | struct ifnet *ifp; |
| 1404 | struct ifaddr *ifa; |
| 1405 | struct sockaddr *sa; |
| 1406 | struct ifreq ifr, *ifrp; |
| 1407 | int space = ifc->ifc_len, error = 0; |
| 1408 | |
| 1409 | ifrp = ifc->ifc_req; |
| 1410 | TAILQ_FOREACH(ifp, &ifnet, if_link) { |
| 1411 | int addrs; |
| 1412 | |
| 1413 | if (space <= sizeof ifr) |
| 1414 | break; |
| 1415 | if (strlcpy(ifr.ifr_name, ifp->if_xname, sizeof(ifr.ifr_name)) |
| 1416 | >= sizeof(ifr.ifr_name)) { |
| 1417 | error = ENAMETOOLONG; |
| 1418 | break; |
| 1419 | } |
| 1420 | |
| 1421 | addrs = 0; |
| 1422 | TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { |
| 1423 | if (space <= sizeof ifr) |
| 1424 | break; |
| 1425 | sa = ifa->ifa_addr; |
| 1426 | if (td->td_proc->p_ucred->cr_prison && |
| 1427 | prison_if(td, sa)) |
| 1428 | continue; |
| 1429 | addrs++; |
| 1430 | #ifdef COMPAT_43 |
| 1431 | if (cmd == OSIOCGIFCONF) { |
| 1432 | struct osockaddr *osa = |
| 1433 | (struct osockaddr *)&ifr.ifr_addr; |
| 1434 | ifr.ifr_addr = *sa; |
| 1435 | osa->sa_family = sa->sa_family; |
| 1436 | error = copyout(&ifr, ifrp, sizeof ifr); |
| 1437 | ifrp++; |
| 1438 | } else |
| 1439 | #endif |
| 1440 | if (sa->sa_len <= sizeof(*sa)) { |
| 1441 | ifr.ifr_addr = *sa; |
| 1442 | error = copyout(&ifr, ifrp, sizeof ifr); |
| 1443 | ifrp++; |
| 1444 | } else { |
| 1445 | if (space < (sizeof ifr) + sa->sa_len - |
| 1446 | sizeof(*sa)) |
| 1447 | break; |
| 1448 | space -= sa->sa_len - sizeof(*sa); |
| 1449 | error = copyout(&ifr, ifrp, |
| 1450 | sizeof ifr.ifr_name); |
| 1451 | if (error == 0) |
| 1452 | error = copyout(sa, &ifrp->ifr_addr, |
| 1453 | sa->sa_len); |
| 1454 | ifrp = (struct ifreq *) |
| 1455 | (sa->sa_len + (caddr_t)&ifrp->ifr_addr); |
| 1456 | } |
| 1457 | if (error) |
| 1458 | break; |
| 1459 | space -= sizeof ifr; |
| 1460 | } |
| 1461 | if (error) |
| 1462 | break; |
| 1463 | if (!addrs) { |
| 1464 | bzero(&ifr.ifr_addr, sizeof ifr.ifr_addr); |
| 1465 | error = copyout(&ifr, ifrp, sizeof ifr); |
| 1466 | if (error) |
| 1467 | break; |
| 1468 | space -= sizeof ifr; |
| 1469 | ifrp++; |
| 1470 | } |
| 1471 | } |
| 1472 | ifc->ifc_len -= space; |
| 1473 | return (error); |
| 1474 | } |
| 1475 | |
| 1476 | /* |
| 1477 | * Just like if_promisc(), but for all-multicast-reception mode. |
| 1478 | */ |
| 1479 | int |
| 1480 | if_allmulti(struct ifnet *ifp, int onswitch) |
| 1481 | { |
| 1482 | int error = 0; |
| 1483 | int s = splimp(); |
| 1484 | struct ifreq ifr; |
| 1485 | |
| 1486 | if (onswitch) { |
| 1487 | if (ifp->if_amcount++ == 0) { |
| 1488 | ifp->if_flags |= IFF_ALLMULTI; |
| 1489 | ifr.ifr_flags = ifp->if_flags; |
| 1490 | ifr.ifr_flagshigh = ifp->if_flags >> 16; |
| 1491 | error = ifp->if_ioctl(ifp, SIOCSIFFLAGS, (caddr_t)&ifr, |
| 1492 | (struct ucred *)NULL); |
| 1493 | } |
| 1494 | } else { |
| 1495 | if (ifp->if_amcount > 1) { |
| 1496 | ifp->if_amcount--; |
| 1497 | } else { |
| 1498 | ifp->if_amcount = 0; |
| 1499 | ifp->if_flags &= ~IFF_ALLMULTI; |
| 1500 | ifr.ifr_flags = ifp->if_flags; |
| 1501 | ifr.ifr_flagshigh = ifp->if_flags >> 16; |
| 1502 | error = ifp->if_ioctl(ifp, SIOCSIFFLAGS, (caddr_t)&ifr, |
| 1503 | (struct ucred *)NULL); |
| 1504 | } |
| 1505 | } |
| 1506 | splx(s); |
| 1507 | |
| 1508 | if (error == 0) |
| 1509 | rt_ifmsg(ifp); |
| 1510 | return error; |
| 1511 | } |
| 1512 | |
| 1513 | /* |
| 1514 | * Add a multicast listenership to the interface in question. |
| 1515 | * The link layer provides a routine which converts |
| 1516 | */ |
| 1517 | int |
| 1518 | if_addmulti( |
| 1519 | struct ifnet *ifp, /* interface to manipulate */ |
| 1520 | struct sockaddr *sa, /* address to add */ |
| 1521 | struct ifmultiaddr **retifma) |
| 1522 | { |
| 1523 | struct sockaddr *llsa, *dupsa; |
| 1524 | int error, s; |
| 1525 | struct ifmultiaddr *ifma; |
| 1526 | |
| 1527 | /* |
| 1528 | * If the matching multicast address already exists |
| 1529 | * then don't add a new one, just add a reference |
| 1530 | */ |
| 1531 | LIST_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) { |
| 1532 | if (sa_equal(sa, ifma->ifma_addr)) { |
| 1533 | ifma->ifma_refcount++; |
| 1534 | if (retifma) |
| 1535 | *retifma = ifma; |
| 1536 | return 0; |
| 1537 | } |
| 1538 | } |
| 1539 | |
| 1540 | /* |
| 1541 | * Give the link layer a chance to accept/reject it, and also |
| 1542 | * find out which AF_LINK address this maps to, if it isn't one |
| 1543 | * already. |
| 1544 | */ |
| 1545 | if (ifp->if_resolvemulti) { |
| 1546 | error = ifp->if_resolvemulti(ifp, &llsa, sa); |
| 1547 | if (error) return error; |
| 1548 | } else { |
| 1549 | llsa = 0; |
| 1550 | } |
| 1551 | |
| 1552 | MALLOC(ifma, struct ifmultiaddr *, sizeof *ifma, M_IFMADDR, M_WAITOK); |
| 1553 | MALLOC(dupsa, struct sockaddr *, sa->sa_len, M_IFMADDR, M_WAITOK); |
| 1554 | bcopy(sa, dupsa, sa->sa_len); |
| 1555 | |
| 1556 | ifma->ifma_addr = dupsa; |
| 1557 | ifma->ifma_lladdr = llsa; |
| 1558 | ifma->ifma_ifp = ifp; |
| 1559 | ifma->ifma_refcount = 1; |
| 1560 | ifma->ifma_protospec = 0; |
| 1561 | rt_newmaddrmsg(RTM_NEWMADDR, ifma); |
| 1562 | |
| 1563 | /* |
| 1564 | * Some network interfaces can scan the address list at |
| 1565 | * interrupt time; lock them out. |
| 1566 | */ |
| 1567 | s = splimp(); |
| 1568 | LIST_INSERT_HEAD(&ifp->if_multiaddrs, ifma, ifma_link); |
| 1569 | splx(s); |
| 1570 | *retifma = ifma; |
| 1571 | |
| 1572 | if (llsa != 0) { |
| 1573 | LIST_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) { |
| 1574 | if (sa_equal(ifma->ifma_addr, llsa)) |
| 1575 | break; |
| 1576 | } |
| 1577 | if (ifma) { |
| 1578 | ifma->ifma_refcount++; |
| 1579 | } else { |
| 1580 | MALLOC(ifma, struct ifmultiaddr *, sizeof *ifma, |
| 1581 | M_IFMADDR, M_WAITOK); |
| 1582 | MALLOC(dupsa, struct sockaddr *, llsa->sa_len, |
| 1583 | M_IFMADDR, M_WAITOK); |
| 1584 | bcopy(llsa, dupsa, llsa->sa_len); |
| 1585 | ifma->ifma_addr = dupsa; |
| 1586 | ifma->ifma_ifp = ifp; |
| 1587 | ifma->ifma_refcount = 1; |
| 1588 | s = splimp(); |
| 1589 | LIST_INSERT_HEAD(&ifp->if_multiaddrs, ifma, ifma_link); |
| 1590 | splx(s); |
| 1591 | } |
| 1592 | } |
| 1593 | /* |
| 1594 | * We are certain we have added something, so call down to the |
| 1595 | * interface to let them know about it. |
| 1596 | */ |
| 1597 | s = splimp(); |
| 1598 | ifp->if_ioctl(ifp, SIOCADDMULTI, 0, (struct ucred *)NULL); |
| 1599 | splx(s); |
| 1600 | |
| 1601 | return 0; |
| 1602 | } |
| 1603 | |
| 1604 | /* |
| 1605 | * Remove a reference to a multicast address on this interface. Yell |
| 1606 | * if the request does not match an existing membership. |
| 1607 | */ |
| 1608 | int |
| 1609 | if_delmulti(struct ifnet *ifp, struct sockaddr *sa) |
| 1610 | { |
| 1611 | struct ifmultiaddr *ifma; |
| 1612 | int s; |
| 1613 | |
| 1614 | LIST_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) |
| 1615 | if (sa_equal(sa, ifma->ifma_addr)) |
| 1616 | break; |
| 1617 | if (ifma == 0) |
| 1618 | return ENOENT; |
| 1619 | |
| 1620 | if (ifma->ifma_refcount > 1) { |
| 1621 | ifma->ifma_refcount--; |
| 1622 | return 0; |
| 1623 | } |
| 1624 | |
| 1625 | rt_newmaddrmsg(RTM_DELMADDR, ifma); |
| 1626 | sa = ifma->ifma_lladdr; |
| 1627 | s = splimp(); |
| 1628 | LIST_REMOVE(ifma, ifma_link); |
| 1629 | /* |
| 1630 | * Make sure the interface driver is notified |
| 1631 | * in the case of a link layer mcast group being left. |
| 1632 | */ |
| 1633 | if (ifma->ifma_addr->sa_family == AF_LINK && sa == 0) |
| 1634 | ifp->if_ioctl(ifp, SIOCDELMULTI, 0, (struct ucred *)NULL); |
| 1635 | splx(s); |
| 1636 | free(ifma->ifma_addr, M_IFMADDR); |
| 1637 | free(ifma, M_IFMADDR); |
| 1638 | if (sa == 0) |
| 1639 | return 0; |
| 1640 | |
| 1641 | /* |
| 1642 | * Now look for the link-layer address which corresponds to |
| 1643 | * this network address. It had been squirreled away in |
| 1644 | * ifma->ifma_lladdr for this purpose (so we don't have |
| 1645 | * to call ifp->if_resolvemulti() again), and we saved that |
| 1646 | * value in sa above. If some nasty deleted the |
| 1647 | * link-layer address out from underneath us, we can deal because |
| 1648 | * the address we stored was is not the same as the one which was |
| 1649 | * in the record for the link-layer address. (So we don't complain |
| 1650 | * in that case.) |
| 1651 | */ |
| 1652 | LIST_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) |
| 1653 | if (sa_equal(sa, ifma->ifma_addr)) |
| 1654 | break; |
| 1655 | if (ifma == 0) |
| 1656 | return 0; |
| 1657 | |
| 1658 | if (ifma->ifma_refcount > 1) { |
| 1659 | ifma->ifma_refcount--; |
| 1660 | return 0; |
| 1661 | } |
| 1662 | |
| 1663 | s = splimp(); |
| 1664 | LIST_REMOVE(ifma, ifma_link); |
| 1665 | ifp->if_ioctl(ifp, SIOCDELMULTI, 0, (struct ucred *)NULL); |
| 1666 | splx(s); |
| 1667 | free(ifma->ifma_addr, M_IFMADDR); |
| 1668 | free(sa, M_IFMADDR); |
| 1669 | free(ifma, M_IFMADDR); |
| 1670 | |
| 1671 | return 0; |
| 1672 | } |
| 1673 | |
| 1674 | /* |
| 1675 | * Set the link layer address on an interface. |
| 1676 | * |
| 1677 | * At this time we only support certain types of interfaces, |
| 1678 | * and we don't allow the length of the address to change. |
| 1679 | */ |
| 1680 | int |
| 1681 | if_setlladdr(struct ifnet *ifp, const u_char *lladdr, int len) |
| 1682 | { |
| 1683 | struct sockaddr_dl *sdl; |
| 1684 | struct ifaddr *ifa; |
| 1685 | struct ifreq ifr; |
| 1686 | |
| 1687 | ifa = ifnet_addrs[ifp->if_index - 1]; |
| 1688 | if (ifa == NULL) |
| 1689 | return (EINVAL); |
| 1690 | sdl = (struct sockaddr_dl *)ifa->ifa_addr; |
| 1691 | if (sdl == NULL) |
| 1692 | return (EINVAL); |
| 1693 | if (len != sdl->sdl_alen) /* don't allow length to change */ |
| 1694 | return (EINVAL); |
| 1695 | switch (ifp->if_type) { |
| 1696 | case IFT_ETHER: /* these types use struct arpcom */ |
| 1697 | case IFT_FDDI: |
| 1698 | case IFT_XETHER: |
| 1699 | case IFT_ISO88025: |
| 1700 | case IFT_L2VLAN: |
| 1701 | bcopy(lladdr, ((struct arpcom *)ifp->if_softc)->ac_enaddr, len); |
| 1702 | /* FALLTHROUGH */ |
| 1703 | case IFT_ARCNET: |
| 1704 | bcopy(lladdr, LLADDR(sdl), len); |
| 1705 | break; |
| 1706 | default: |
| 1707 | return (ENODEV); |
| 1708 | } |
| 1709 | /* |
| 1710 | * If the interface is already up, we need |
| 1711 | * to re-init it in order to reprogram its |
| 1712 | * address filter. |
| 1713 | */ |
| 1714 | if ((ifp->if_flags & IFF_UP) != 0) { |
| 1715 | ifp->if_flags &= ~IFF_UP; |
| 1716 | ifr.ifr_flags = ifp->if_flags; |
| 1717 | ifr.ifr_flagshigh = ifp->if_flags >> 16; |
| 1718 | (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr, |
| 1719 | (struct ucred *)NULL); |
| 1720 | ifp->if_flags |= IFF_UP; |
| 1721 | ifr.ifr_flags = ifp->if_flags; |
| 1722 | ifr.ifr_flagshigh = ifp->if_flags >> 16; |
| 1723 | (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr, |
| 1724 | (struct ucred *)NULL); |
| 1725 | #ifdef INET |
| 1726 | /* |
| 1727 | * Also send gratuitous ARPs to notify other nodes about |
| 1728 | * the address change. |
| 1729 | */ |
| 1730 | TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { |
| 1731 | if (ifa->ifa_addr != NULL && |
| 1732 | ifa->ifa_addr->sa_family == AF_INET) |
| 1733 | arp_ifinit(ifp, ifa); |
| 1734 | } |
| 1735 | #endif |
| 1736 | } |
| 1737 | return (0); |
| 1738 | } |
| 1739 | |
| 1740 | struct ifmultiaddr * |
| 1741 | ifmaof_ifpforaddr(struct sockaddr *sa, struct ifnet *ifp) |
| 1742 | { |
| 1743 | struct ifmultiaddr *ifma; |
| 1744 | |
| 1745 | LIST_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) |
| 1746 | if (sa_equal(ifma->ifma_addr, sa)) |
| 1747 | break; |
| 1748 | |
| 1749 | return ifma; |
| 1750 | } |
| 1751 | |
| 1752 | /* |
| 1753 | * The name argument must be a pointer to storage which will last as |
| 1754 | * long as the interface does. For physical devices, the result of |
| 1755 | * device_get_name(dev) is a good choice and for pseudo-devices a |
| 1756 | * static string works well. |
| 1757 | */ |
| 1758 | void |
| 1759 | if_initname(struct ifnet *ifp, const char *name, int unit) |
| 1760 | { |
| 1761 | ifp->if_dname = name; |
| 1762 | ifp->if_dunit = unit; |
| 1763 | if (unit != IF_DUNIT_NONE) |
| 1764 | snprintf(ifp->if_xname, IFNAMSIZ, "%s%d", name, unit); |
| 1765 | else |
| 1766 | strlcpy(ifp->if_xname, name, IFNAMSIZ); |
| 1767 | } |
| 1768 | |
| 1769 | int |
| 1770 | if_printf(struct ifnet *ifp, const char *fmt, ...) |
| 1771 | { |
| 1772 | __va_list ap; |
| 1773 | int retval; |
| 1774 | |
| 1775 | retval = printf("%s: ", ifp->if_xname); |
| 1776 | __va_start(ap, fmt); |
| 1777 | retval += vprintf(fmt, ap); |
| 1778 | __va_end(ap); |
| 1779 | return (retval); |
| 1780 | } |
| 1781 | |
| 1782 | SYSCTL_NODE(_net, PF_LINK, link, CTLFLAG_RW, 0, "Link layers"); |
| 1783 | SYSCTL_NODE(_net_link, 0, generic, CTLFLAG_RW, 0, "Generic link-management"); |