1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 1980, 1986, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 3. Neither the name of the University nor the names of its contributors 16 * may be used to endorse or promote products derived from this software 17 * without specific prior written permission. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 29 * SUCH DAMAGE. 30 * 31 * @(#)if.c 8.5 (Berkeley) 1/9/95 32 * $FreeBSD$ 33 */ 34 35 #include "opt_compat.h" 36 #include "opt_inet6.h" 37 #include "opt_inet.h" 38 39 #include <sys/param.h> 40 #include <sys/types.h> 41 #include <sys/conf.h> 42 #include <sys/malloc.h> 43 #include <sys/sbuf.h> 44 #include <sys/bus.h> 45 #include <sys/mbuf.h> 46 #include <sys/systm.h> 47 #include <sys/priv.h> 48 #include <sys/proc.h> 49 #include <sys/socket.h> 50 #include <sys/socketvar.h> 51 #include <sys/protosw.h> 52 #include <sys/kernel.h> 53 #include <sys/lock.h> 54 #include <sys/refcount.h> 55 #include <sys/module.h> 56 #include <sys/rwlock.h> 57 #include <sys/sockio.h> 58 #include <sys/syslog.h> 59 #include <sys/sysctl.h> 60 #include <sys/sysent.h> 61 #include <sys/taskqueue.h> 62 #include <sys/domain.h> 63 #include <sys/jail.h> 64 #include <sys/priv.h> 65 66 #include <machine/stdarg.h> 67 #include <vm/uma.h> 68 69 #include <net/bpf.h> 70 #include <net/ethernet.h> 71 #include <net/if.h> 72 #include <net/if_arp.h> 73 #include <net/if_clone.h> 74 #include <net/if_dl.h> 75 #include <net/if_types.h> 76 #include <net/if_var.h> 77 #include <net/if_media.h> 78 #include <net/if_vlan_var.h> 79 #include <net/radix.h> 80 #include <net/route.h> 81 #include <net/vnet.h> 82 83 #if defined(INET) || defined(INET6) 84 #include <net/ethernet.h> 85 #include <netinet/in.h> 86 #include <netinet/in_var.h> 87 #include <netinet/ip.h> 88 #include <netinet/ip_carp.h> 89 #ifdef INET 90 #include <netinet/if_ether.h> 91 #endif /* INET */ 92 #ifdef INET6 93 #include <netinet6/in6_var.h> 94 #include <netinet6/in6_ifattach.h> 95 #endif /* INET6 */ 96 #endif /* INET || INET6 */ 97 98 #include <security/mac/mac_framework.h> 99 100 /* 101 * Consumers of struct ifreq such as tcpdump assume no pad between ifr_name 102 * and ifr_ifru when it is used in SIOCGIFCONF. 103 */ 104 _Static_assert(sizeof(((struct ifreq *)0)->ifr_name) == 105 offsetof(struct ifreq, ifr_ifru), "gap between ifr_name and ifr_ifru"); 106 107 #ifdef COMPAT_FREEBSD32 108 #include <sys/mount.h> 109 #include <compat/freebsd32/freebsd32.h> 110 111 struct ifreq_buffer32 { 112 uint32_t length; /* (size_t) */ 113 uint32_t buffer; /* (void *) */ 114 }; 115 116 /* 117 * Interface request structure used for socket 118 * ioctl's. All interface ioctl's must have parameter 119 * definitions which begin with ifr_name. The 120 * remainder may be interface specific. 121 */ 122 struct ifreq32 { 123 char ifr_name[IFNAMSIZ]; /* if name, e.g. "en0" */ 124 union { 125 struct sockaddr ifru_addr; 126 struct sockaddr ifru_dstaddr; 127 struct sockaddr ifru_broadaddr; 128 struct ifreq_buffer32 ifru_buffer; 129 short ifru_flags[2]; 130 short ifru_index; 131 int ifru_jid; 132 int ifru_metric; 133 int ifru_mtu; 134 int ifru_phys; 135 int ifru_media; 136 uint32_t ifru_data; 137 int ifru_cap[2]; 138 u_int ifru_fib; 139 u_char ifru_vlan_pcp; 140 } ifr_ifru; 141 }; 142 CTASSERT(sizeof(struct ifreq) == sizeof(struct ifreq32)); 143 CTASSERT(__offsetof(struct ifreq, ifr_ifru) == 144 __offsetof(struct ifreq32, ifr_ifru)); 145 #endif 146 147 union ifreq_union { 148 struct ifreq ifr; 149 #ifdef COMPAT_FREEBSD32 150 struct ifreq32 ifr32; 151 #endif 152 }; 153 154 SYSCTL_NODE(_net, PF_LINK, link, CTLFLAG_RW, 0, "Link layers"); 155 SYSCTL_NODE(_net_link, 0, generic, CTLFLAG_RW, 0, "Generic link-management"); 156 157 SYSCTL_INT(_net_link, OID_AUTO, ifqmaxlen, CTLFLAG_RDTUN, 158 &ifqmaxlen, 0, "max send queue size"); 159 160 /* Log link state change events */ 161 static int log_link_state_change = 1; 162 163 SYSCTL_INT(_net_link, OID_AUTO, log_link_state_change, CTLFLAG_RW, 164 &log_link_state_change, 0, 165 "log interface link state change events"); 166 167 /* Log promiscuous mode change events */ 168 static int log_promisc_mode_change = 1; 169 170 SYSCTL_INT(_net_link, OID_AUTO, log_promisc_mode_change, CTLFLAG_RDTUN, 171 &log_promisc_mode_change, 1, 172 "log promiscuous mode change events"); 173 174 /* Interface description */ 175 static unsigned int ifdescr_maxlen = 1024; 176 SYSCTL_UINT(_net, OID_AUTO, ifdescr_maxlen, CTLFLAG_RW, 177 &ifdescr_maxlen, 0, 178 "administrative maximum length for interface description"); 179 180 static MALLOC_DEFINE(M_IFDESCR, "ifdescr", "ifnet descriptions"); 181 182 /* global sx for non-critical path ifdescr */ 183 static struct sx ifdescr_sx; 184 SX_SYSINIT(ifdescr_sx, &ifdescr_sx, "ifnet descr"); 185 186 void (*bridge_linkstate_p)(struct ifnet *ifp); 187 void (*ng_ether_link_state_p)(struct ifnet *ifp, int state); 188 void (*lagg_linkstate_p)(struct ifnet *ifp, int state); 189 /* These are external hooks for CARP. */ 190 void (*carp_linkstate_p)(struct ifnet *ifp); 191 void (*carp_demote_adj_p)(int, char *); 192 int (*carp_master_p)(struct ifaddr *); 193 #if defined(INET) || defined(INET6) 194 int (*carp_forus_p)(struct ifnet *ifp, u_char *dhost); 195 int (*carp_output_p)(struct ifnet *ifp, struct mbuf *m, 196 const struct sockaddr *sa); 197 int (*carp_ioctl_p)(struct ifreq *, u_long, struct thread *); 198 int (*carp_attach_p)(struct ifaddr *, int); 199 void (*carp_detach_p)(struct ifaddr *, bool); 200 #endif 201 #ifdef INET 202 int (*carp_iamatch_p)(struct ifaddr *, uint8_t **); 203 #endif 204 #ifdef INET6 205 struct ifaddr *(*carp_iamatch6_p)(struct ifnet *ifp, struct in6_addr *taddr6); 206 caddr_t (*carp_macmatch6_p)(struct ifnet *ifp, struct mbuf *m, 207 const struct in6_addr *taddr); 208 #endif 209 210 struct mbuf *(*tbr_dequeue_ptr)(struct ifaltq *, int) = NULL; 211 212 /* 213 * XXX: Style; these should be sorted alphabetically, and unprototyped 214 * static functions should be prototyped. Currently they are sorted by 215 * declaration order. 216 */ 217 static void if_attachdomain(void *); 218 static void if_attachdomain1(struct ifnet *); 219 static int ifconf(u_long, caddr_t); 220 static void if_freemulti(struct ifmultiaddr *); 221 static void if_grow(void); 222 static void if_input_default(struct ifnet *, struct mbuf *); 223 static int if_requestencap_default(struct ifnet *, struct if_encap_req *); 224 static void if_route(struct ifnet *, int flag, int fam); 225 static int if_setflag(struct ifnet *, int, int, int *, int); 226 static int if_transmit(struct ifnet *ifp, struct mbuf *m); 227 static void if_unroute(struct ifnet *, int flag, int fam); 228 static void link_rtrequest(int, struct rtentry *, struct rt_addrinfo *); 229 static int ifhwioctl(u_long, struct ifnet *, caddr_t, struct thread *); 230 static int if_delmulti_locked(struct ifnet *, struct ifmultiaddr *, int); 231 static void do_link_state_change(void *, int); 232 static int if_getgroup(struct ifgroupreq *, struct ifnet *); 233 static int if_getgroupmembers(struct ifgroupreq *); 234 static void if_delgroups(struct ifnet *); 235 static void if_attach_internal(struct ifnet *, int, struct if_clone *); 236 static int if_detach_internal(struct ifnet *, int, struct if_clone **); 237 #ifdef VIMAGE 238 static void if_vmove(struct ifnet *, struct vnet *); 239 #endif 240 241 #ifdef INET6 242 /* 243 * XXX: declare here to avoid to include many inet6 related files.. 244 * should be more generalized? 245 */ 246 extern void nd6_setmtu(struct ifnet *); 247 #endif 248 249 /* ipsec helper hooks */ 250 VNET_DEFINE(struct hhook_head *, ipsec_hhh_in[HHOOK_IPSEC_COUNT]); 251 VNET_DEFINE(struct hhook_head *, ipsec_hhh_out[HHOOK_IPSEC_COUNT]); 252 253 VNET_DEFINE(int, if_index); 254 int ifqmaxlen = IFQ_MAXLEN; 255 VNET_DEFINE(struct ifnethead, ifnet); /* depend on static init XXX */ 256 VNET_DEFINE(struct ifgrouphead, ifg_head); 257 258 static VNET_DEFINE(int, if_indexlim) = 8; 259 260 /* Table of ifnet by index. */ 261 VNET_DEFINE(struct ifnet **, ifindex_table); 262 263 #define V_if_indexlim VNET(if_indexlim) 264 #define V_ifindex_table VNET(ifindex_table) 265 266 /* 267 * The global network interface list (V_ifnet) and related state (such as 268 * if_index, if_indexlim, and ifindex_table) are protected by an sxlock and 269 * an rwlock. Either may be acquired shared to stablize the list, but both 270 * must be acquired writable to modify the list. This model allows us to 271 * both stablize the interface list during interrupt thread processing, but 272 * also to stablize it over long-running ioctls, without introducing priority 273 * inversions and deadlocks. 274 */ 275 struct rwlock ifnet_rwlock; 276 RW_SYSINIT_FLAGS(ifnet_rw, &ifnet_rwlock, "ifnet_rw", RW_RECURSE); 277 struct sx ifnet_sxlock; 278 SX_SYSINIT_FLAGS(ifnet_sx, &ifnet_sxlock, "ifnet_sx", SX_RECURSE); 279 280 /* 281 * The allocation of network interfaces is a rather non-atomic affair; we 282 * need to select an index before we are ready to expose the interface for 283 * use, so will use this pointer value to indicate reservation. 284 */ 285 #define IFNET_HOLD (void *)(uintptr_t)(-1) 286 287 static if_com_alloc_t *if_com_alloc[256]; 288 static if_com_free_t *if_com_free[256]; 289 290 static MALLOC_DEFINE(M_IFNET, "ifnet", "interface internals"); 291 MALLOC_DEFINE(M_IFADDR, "ifaddr", "interface address"); 292 MALLOC_DEFINE(M_IFMADDR, "ether_multi", "link-level multicast address"); 293 294 struct ifnet * 295 ifnet_byindex_locked(u_short idx) 296 { 297 298 if (idx > V_if_index) 299 return (NULL); 300 if (V_ifindex_table[idx] == IFNET_HOLD) 301 return (NULL); 302 return (V_ifindex_table[idx]); 303 } 304 305 struct ifnet * 306 ifnet_byindex(u_short idx) 307 { 308 struct ifnet *ifp; 309 310 IFNET_RLOCK_NOSLEEP(); 311 ifp = ifnet_byindex_locked(idx); 312 IFNET_RUNLOCK_NOSLEEP(); 313 return (ifp); 314 } 315 316 struct ifnet * 317 ifnet_byindex_ref(u_short idx) 318 { 319 struct ifnet *ifp; 320 321 IFNET_RLOCK_NOSLEEP(); 322 ifp = ifnet_byindex_locked(idx); 323 if (ifp == NULL || (ifp->if_flags & IFF_DYING)) { 324 IFNET_RUNLOCK_NOSLEEP(); 325 return (NULL); 326 } 327 if_ref(ifp); 328 IFNET_RUNLOCK_NOSLEEP(); 329 return (ifp); 330 } 331 332 /* 333 * Allocate an ifindex array entry; return 0 on success or an error on 334 * failure. 335 */ 336 static u_short 337 ifindex_alloc(void) 338 { 339 u_short idx; 340 341 IFNET_WLOCK_ASSERT(); 342 retry: 343 /* 344 * Try to find an empty slot below V_if_index. If we fail, take the 345 * next slot. 346 */ 347 for (idx = 1; idx <= V_if_index; idx++) { 348 if (V_ifindex_table[idx] == NULL) 349 break; 350 } 351 352 /* Catch if_index overflow. */ 353 if (idx >= V_if_indexlim) { 354 if_grow(); 355 goto retry; 356 } 357 if (idx > V_if_index) 358 V_if_index = idx; 359 return (idx); 360 } 361 362 static void 363 ifindex_free_locked(u_short idx) 364 { 365 366 IFNET_WLOCK_ASSERT(); 367 368 V_ifindex_table[idx] = NULL; 369 while (V_if_index > 0 && 370 V_ifindex_table[V_if_index] == NULL) 371 V_if_index--; 372 } 373 374 static void 375 ifindex_free(u_short idx) 376 { 377 378 IFNET_WLOCK(); 379 ifindex_free_locked(idx); 380 IFNET_WUNLOCK(); 381 } 382 383 static void 384 ifnet_setbyindex_locked(u_short idx, struct ifnet *ifp) 385 { 386 387 IFNET_WLOCK_ASSERT(); 388 389 V_ifindex_table[idx] = ifp; 390 } 391 392 static void 393 ifnet_setbyindex(u_short idx, struct ifnet *ifp) 394 { 395 396 IFNET_WLOCK(); 397 ifnet_setbyindex_locked(idx, ifp); 398 IFNET_WUNLOCK(); 399 } 400 401 struct ifaddr * 402 ifaddr_byindex(u_short idx) 403 { 404 struct ifnet *ifp; 405 struct ifaddr *ifa = NULL; 406 407 IFNET_RLOCK_NOSLEEP(); 408 ifp = ifnet_byindex_locked(idx); 409 if (ifp != NULL && (ifa = ifp->if_addr) != NULL) 410 ifa_ref(ifa); 411 IFNET_RUNLOCK_NOSLEEP(); 412 return (ifa); 413 } 414 415 /* 416 * Network interface utility routines. 417 * 418 * Routines with ifa_ifwith* names take sockaddr *'s as 419 * parameters. 420 */ 421 422 static void 423 vnet_if_init(const void *unused __unused) 424 { 425 426 TAILQ_INIT(&V_ifnet); 427 TAILQ_INIT(&V_ifg_head); 428 IFNET_WLOCK(); 429 if_grow(); /* create initial table */ 430 IFNET_WUNLOCK(); 431 vnet_if_clone_init(); 432 } 433 VNET_SYSINIT(vnet_if_init, SI_SUB_INIT_IF, SI_ORDER_SECOND, vnet_if_init, 434 NULL); 435 436 #ifdef VIMAGE 437 static void 438 vnet_if_uninit(const void *unused __unused) 439 { 440 441 VNET_ASSERT(TAILQ_EMPTY(&V_ifnet), ("%s:%d tailq &V_ifnet=%p " 442 "not empty", __func__, __LINE__, &V_ifnet)); 443 VNET_ASSERT(TAILQ_EMPTY(&V_ifg_head), ("%s:%d tailq &V_ifg_head=%p " 444 "not empty", __func__, __LINE__, &V_ifg_head)); 445 446 free((caddr_t)V_ifindex_table, M_IFNET); 447 } 448 VNET_SYSUNINIT(vnet_if_uninit, SI_SUB_INIT_IF, SI_ORDER_FIRST, 449 vnet_if_uninit, NULL); 450 451 static void 452 vnet_if_return(const void *unused __unused) 453 { 454 struct ifnet *ifp, *nifp; 455 456 /* Return all inherited interfaces to their parent vnets. */ 457 TAILQ_FOREACH_SAFE(ifp, &V_ifnet, if_link, nifp) { 458 if (ifp->if_home_vnet != ifp->if_vnet) 459 if_vmove(ifp, ifp->if_home_vnet); 460 } 461 } 462 VNET_SYSUNINIT(vnet_if_return, SI_SUB_VNET_DONE, SI_ORDER_ANY, 463 vnet_if_return, NULL); 464 #endif 465 466 static void 467 if_grow(void) 468 { 469 int oldlim; 470 u_int n; 471 struct ifnet **e; 472 473 IFNET_WLOCK_ASSERT(); 474 oldlim = V_if_indexlim; 475 IFNET_WUNLOCK(); 476 n = (oldlim << 1) * sizeof(*e); 477 e = malloc(n, M_IFNET, M_WAITOK | M_ZERO); 478 IFNET_WLOCK(); 479 if (V_if_indexlim != oldlim) { 480 free(e, M_IFNET); 481 return; 482 } 483 if (V_ifindex_table != NULL) { 484 memcpy((caddr_t)e, (caddr_t)V_ifindex_table, n/2); 485 free((caddr_t)V_ifindex_table, M_IFNET); 486 } 487 V_if_indexlim <<= 1; 488 V_ifindex_table = e; 489 } 490 491 /* 492 * Allocate a struct ifnet and an index for an interface. A layer 2 493 * common structure will also be allocated if an allocation routine is 494 * registered for the passed type. 495 */ 496 struct ifnet * 497 if_alloc(u_char type) 498 { 499 struct ifnet *ifp; 500 u_short idx; 501 502 ifp = malloc(sizeof(struct ifnet), M_IFNET, M_WAITOK|M_ZERO); 503 IFNET_WLOCK(); 504 idx = ifindex_alloc(); 505 ifnet_setbyindex_locked(idx, IFNET_HOLD); 506 IFNET_WUNLOCK(); 507 ifp->if_index = idx; 508 ifp->if_type = type; 509 ifp->if_alloctype = type; 510 #ifdef VIMAGE 511 ifp->if_vnet = curvnet; 512 #endif 513 if (if_com_alloc[type] != NULL) { 514 ifp->if_l2com = if_com_alloc[type](type, ifp); 515 if (ifp->if_l2com == NULL) { 516 free(ifp, M_IFNET); 517 ifindex_free(idx); 518 return (NULL); 519 } 520 } 521 522 IF_ADDR_LOCK_INIT(ifp); 523 TASK_INIT(&ifp->if_linktask, 0, do_link_state_change, ifp); 524 ifp->if_afdata_initialized = 0; 525 IF_AFDATA_LOCK_INIT(ifp); 526 TAILQ_INIT(&ifp->if_addrhead); 527 TAILQ_INIT(&ifp->if_multiaddrs); 528 TAILQ_INIT(&ifp->if_groups); 529 #ifdef MAC 530 mac_ifnet_init(ifp); 531 #endif 532 ifq_init(&ifp->if_snd, ifp); 533 534 refcount_init(&ifp->if_refcount, 1); /* Index reference. */ 535 for (int i = 0; i < IFCOUNTERS; i++) 536 ifp->if_counters[i] = counter_u64_alloc(M_WAITOK); 537 ifp->if_get_counter = if_get_counter_default; 538 ifp->if_pcp = IFNET_PCP_NONE; 539 ifnet_setbyindex(ifp->if_index, ifp); 540 return (ifp); 541 } 542 543 /* 544 * Do the actual work of freeing a struct ifnet, and layer 2 common 545 * structure. This call is made when the last reference to an 546 * interface is released. 547 */ 548 static void 549 if_free_internal(struct ifnet *ifp) 550 { 551 552 KASSERT((ifp->if_flags & IFF_DYING), 553 ("if_free_internal: interface not dying")); 554 555 if (if_com_free[ifp->if_alloctype] != NULL) 556 if_com_free[ifp->if_alloctype](ifp->if_l2com, 557 ifp->if_alloctype); 558 559 #ifdef MAC 560 mac_ifnet_destroy(ifp); 561 #endif /* MAC */ 562 if (ifp->if_description != NULL) 563 free(ifp->if_description, M_IFDESCR); 564 IF_AFDATA_DESTROY(ifp); 565 IF_ADDR_LOCK_DESTROY(ifp); 566 ifq_delete(&ifp->if_snd); 567 568 for (int i = 0; i < IFCOUNTERS; i++) 569 counter_u64_free(ifp->if_counters[i]); 570 571 free(ifp, M_IFNET); 572 } 573 574 /* 575 * Deregister an interface and free the associated storage. 576 */ 577 void 578 if_free(struct ifnet *ifp) 579 { 580 581 ifp->if_flags |= IFF_DYING; /* XXX: Locking */ 582 583 CURVNET_SET_QUIET(ifp->if_vnet); 584 IFNET_WLOCK(); 585 KASSERT(ifp == ifnet_byindex_locked(ifp->if_index), 586 ("%s: freeing unallocated ifnet", ifp->if_xname)); 587 588 ifindex_free_locked(ifp->if_index); 589 IFNET_WUNLOCK(); 590 591 if (refcount_release(&ifp->if_refcount)) 592 if_free_internal(ifp); 593 CURVNET_RESTORE(); 594 } 595 596 /* 597 * Interfaces to keep an ifnet type-stable despite the possibility of the 598 * driver calling if_free(). If there are additional references, we defer 599 * freeing the underlying data structure. 600 */ 601 void 602 if_ref(struct ifnet *ifp) 603 { 604 605 /* We don't assert the ifnet list lock here, but arguably should. */ 606 refcount_acquire(&ifp->if_refcount); 607 } 608 609 void 610 if_rele(struct ifnet *ifp) 611 { 612 613 if (!refcount_release(&ifp->if_refcount)) 614 return; 615 if_free_internal(ifp); 616 } 617 618 void 619 ifq_init(struct ifaltq *ifq, struct ifnet *ifp) 620 { 621 622 mtx_init(&ifq->ifq_mtx, ifp->if_xname, "if send queue", MTX_DEF); 623 624 if (ifq->ifq_maxlen == 0) 625 ifq->ifq_maxlen = ifqmaxlen; 626 627 ifq->altq_type = 0; 628 ifq->altq_disc = NULL; 629 ifq->altq_flags &= ALTQF_CANTCHANGE; 630 ifq->altq_tbr = NULL; 631 ifq->altq_ifp = ifp; 632 } 633 634 void 635 ifq_delete(struct ifaltq *ifq) 636 { 637 mtx_destroy(&ifq->ifq_mtx); 638 } 639 640 /* 641 * Perform generic interface initialization tasks and attach the interface 642 * to the list of "active" interfaces. If vmove flag is set on entry 643 * to if_attach_internal(), perform only a limited subset of initialization 644 * tasks, given that we are moving from one vnet to another an ifnet which 645 * has already been fully initialized. 646 * 647 * Note that if_detach_internal() removes group membership unconditionally 648 * even when vmove flag is set, and if_attach_internal() adds only IFG_ALL. 649 * Thus, when if_vmove() is applied to a cloned interface, group membership 650 * is lost while a cloned one always joins a group whose name is 651 * ifc->ifc_name. To recover this after if_detach_internal() and 652 * if_attach_internal(), the cloner should be specified to 653 * if_attach_internal() via ifc. If it is non-NULL, if_attach_internal() 654 * attempts to join a group whose name is ifc->ifc_name. 655 * 656 * XXX: 657 * - The decision to return void and thus require this function to 658 * succeed is questionable. 659 * - We should probably do more sanity checking. For instance we don't 660 * do anything to insure if_xname is unique or non-empty. 661 */ 662 void 663 if_attach(struct ifnet *ifp) 664 { 665 666 if_attach_internal(ifp, 0, NULL); 667 } 668 669 /* 670 * Compute the least common TSO limit. 671 */ 672 void 673 if_hw_tsomax_common(if_t ifp, struct ifnet_hw_tsomax *pmax) 674 { 675 /* 676 * 1) If there is no limit currently, take the limit from 677 * the network adapter. 678 * 679 * 2) If the network adapter has a limit below the current 680 * limit, apply it. 681 */ 682 if (pmax->tsomaxbytes == 0 || (ifp->if_hw_tsomax != 0 && 683 ifp->if_hw_tsomax < pmax->tsomaxbytes)) { 684 pmax->tsomaxbytes = ifp->if_hw_tsomax; 685 } 686 if (pmax->tsomaxsegcount == 0 || (ifp->if_hw_tsomaxsegcount != 0 && 687 ifp->if_hw_tsomaxsegcount < pmax->tsomaxsegcount)) { 688 pmax->tsomaxsegcount = ifp->if_hw_tsomaxsegcount; 689 } 690 if (pmax->tsomaxsegsize == 0 || (ifp->if_hw_tsomaxsegsize != 0 && 691 ifp->if_hw_tsomaxsegsize < pmax->tsomaxsegsize)) { 692 pmax->tsomaxsegsize = ifp->if_hw_tsomaxsegsize; 693 } 694 } 695 696 /* 697 * Update TSO limit of a network adapter. 698 * 699 * Returns zero if no change. Else non-zero. 700 */ 701 int 702 if_hw_tsomax_update(if_t ifp, struct ifnet_hw_tsomax *pmax) 703 { 704 int retval = 0; 705 if (ifp->if_hw_tsomax != pmax->tsomaxbytes) { 706 ifp->if_hw_tsomax = pmax->tsomaxbytes; 707 retval++; 708 } 709 if (ifp->if_hw_tsomaxsegsize != pmax->tsomaxsegsize) { 710 ifp->if_hw_tsomaxsegsize = pmax->tsomaxsegsize; 711 retval++; 712 } 713 if (ifp->if_hw_tsomaxsegcount != pmax->tsomaxsegcount) { 714 ifp->if_hw_tsomaxsegcount = pmax->tsomaxsegcount; 715 retval++; 716 } 717 return (retval); 718 } 719 720 static void 721 if_attach_internal(struct ifnet *ifp, int vmove, struct if_clone *ifc) 722 { 723 unsigned socksize, ifasize; 724 int namelen, masklen; 725 struct sockaddr_dl *sdl; 726 struct ifaddr *ifa; 727 728 if (ifp->if_index == 0 || ifp != ifnet_byindex(ifp->if_index)) 729 panic ("%s: BUG: if_attach called without if_alloc'd input()\n", 730 ifp->if_xname); 731 732 #ifdef VIMAGE 733 ifp->if_vnet = curvnet; 734 if (ifp->if_home_vnet == NULL) 735 ifp->if_home_vnet = curvnet; 736 #endif 737 738 if_addgroup(ifp, IFG_ALL); 739 740 /* Restore group membership for cloned interfaces. */ 741 if (vmove && ifc != NULL) 742 if_clone_addgroup(ifp, ifc); 743 744 getmicrotime(&ifp->if_lastchange); 745 ifp->if_epoch = time_uptime; 746 747 KASSERT((ifp->if_transmit == NULL && ifp->if_qflush == NULL) || 748 (ifp->if_transmit != NULL && ifp->if_qflush != NULL), 749 ("transmit and qflush must both either be set or both be NULL")); 750 if (ifp->if_transmit == NULL) { 751 ifp->if_transmit = if_transmit; 752 ifp->if_qflush = if_qflush; 753 } 754 if (ifp->if_input == NULL) 755 ifp->if_input = if_input_default; 756 757 if (ifp->if_requestencap == NULL) 758 ifp->if_requestencap = if_requestencap_default; 759 760 if (!vmove) { 761 #ifdef MAC 762 mac_ifnet_create(ifp); 763 #endif 764 765 /* 766 * Create a Link Level name for this device. 767 */ 768 namelen = strlen(ifp->if_xname); 769 /* 770 * Always save enough space for any possiable name so we 771 * can do a rename in place later. 772 */ 773 masklen = offsetof(struct sockaddr_dl, sdl_data[0]) + IFNAMSIZ; 774 socksize = masklen + ifp->if_addrlen; 775 if (socksize < sizeof(*sdl)) 776 socksize = sizeof(*sdl); 777 socksize = roundup2(socksize, sizeof(long)); 778 ifasize = sizeof(*ifa) + 2 * socksize; 779 ifa = ifa_alloc(ifasize, M_WAITOK); 780 sdl = (struct sockaddr_dl *)(ifa + 1); 781 sdl->sdl_len = socksize; 782 sdl->sdl_family = AF_LINK; 783 bcopy(ifp->if_xname, sdl->sdl_data, namelen); 784 sdl->sdl_nlen = namelen; 785 sdl->sdl_index = ifp->if_index; 786 sdl->sdl_type = ifp->if_type; 787 ifp->if_addr = ifa; 788 ifa->ifa_ifp = ifp; 789 ifa->ifa_rtrequest = link_rtrequest; 790 ifa->ifa_addr = (struct sockaddr *)sdl; 791 sdl = (struct sockaddr_dl *)(socksize + (caddr_t)sdl); 792 ifa->ifa_netmask = (struct sockaddr *)sdl; 793 sdl->sdl_len = masklen; 794 while (namelen != 0) 795 sdl->sdl_data[--namelen] = 0xff; 796 TAILQ_INSERT_HEAD(&ifp->if_addrhead, ifa, ifa_link); 797 /* Reliably crash if used uninitialized. */ 798 ifp->if_broadcastaddr = NULL; 799 800 if (ifp->if_type == IFT_ETHER) { 801 ifp->if_hw_addr = malloc(ifp->if_addrlen, M_IFADDR, 802 M_WAITOK | M_ZERO); 803 } 804 805 #if defined(INET) || defined(INET6) 806 /* Use defaults for TSO, if nothing is set */ 807 if (ifp->if_hw_tsomax == 0 && 808 ifp->if_hw_tsomaxsegcount == 0 && 809 ifp->if_hw_tsomaxsegsize == 0) { 810 /* 811 * The TSO defaults needs to be such that an 812 * NFS mbuf list of 35 mbufs totalling just 813 * below 64K works and that a chain of mbufs 814 * can be defragged into at most 32 segments: 815 */ 816 ifp->if_hw_tsomax = min(IP_MAXPACKET, (32 * MCLBYTES) - 817 (ETHER_HDR_LEN + ETHER_VLAN_ENCAP_LEN)); 818 ifp->if_hw_tsomaxsegcount = 35; 819 ifp->if_hw_tsomaxsegsize = 2048; /* 2K */ 820 821 /* XXX some drivers set IFCAP_TSO after ethernet attach */ 822 if (ifp->if_capabilities & IFCAP_TSO) { 823 if_printf(ifp, "Using defaults for TSO: %u/%u/%u\n", 824 ifp->if_hw_tsomax, 825 ifp->if_hw_tsomaxsegcount, 826 ifp->if_hw_tsomaxsegsize); 827 } 828 } 829 #endif 830 } 831 #ifdef VIMAGE 832 else { 833 /* 834 * Update the interface index in the link layer address 835 * of the interface. 836 */ 837 for (ifa = ifp->if_addr; ifa != NULL; 838 ifa = TAILQ_NEXT(ifa, ifa_link)) { 839 if (ifa->ifa_addr->sa_family == AF_LINK) { 840 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 841 sdl->sdl_index = ifp->if_index; 842 } 843 } 844 } 845 #endif 846 847 IFNET_WLOCK(); 848 TAILQ_INSERT_TAIL(&V_ifnet, ifp, if_link); 849 #ifdef VIMAGE 850 curvnet->vnet_ifcnt++; 851 #endif 852 IFNET_WUNLOCK(); 853 854 if (domain_init_status >= 2) 855 if_attachdomain1(ifp); 856 857 EVENTHANDLER_INVOKE(ifnet_arrival_event, ifp); 858 if (IS_DEFAULT_VNET(curvnet)) 859 devctl_notify("IFNET", ifp->if_xname, "ATTACH", NULL); 860 861 /* Announce the interface. */ 862 rt_ifannouncemsg(ifp, IFAN_ARRIVAL); 863 } 864 865 static void 866 if_attachdomain(void *dummy) 867 { 868 struct ifnet *ifp; 869 870 TAILQ_FOREACH(ifp, &V_ifnet, if_link) 871 if_attachdomain1(ifp); 872 } 873 SYSINIT(domainifattach, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_SECOND, 874 if_attachdomain, NULL); 875 876 static void 877 if_attachdomain1(struct ifnet *ifp) 878 { 879 struct domain *dp; 880 881 /* 882 * Since dp->dom_ifattach calls malloc() with M_WAITOK, we 883 * cannot lock ifp->if_afdata initialization, entirely. 884 */ 885 IF_AFDATA_LOCK(ifp); 886 if (ifp->if_afdata_initialized >= domain_init_status) { 887 IF_AFDATA_UNLOCK(ifp); 888 log(LOG_WARNING, "%s called more than once on %s\n", 889 __func__, ifp->if_xname); 890 return; 891 } 892 ifp->if_afdata_initialized = domain_init_status; 893 IF_AFDATA_UNLOCK(ifp); 894 895 /* address family dependent data region */ 896 bzero(ifp->if_afdata, sizeof(ifp->if_afdata)); 897 for (dp = domains; dp; dp = dp->dom_next) { 898 if (dp->dom_ifattach) 899 ifp->if_afdata[dp->dom_family] = 900 (*dp->dom_ifattach)(ifp); 901 } 902 } 903 904 /* 905 * Remove any unicast or broadcast network addresses from an interface. 906 */ 907 void 908 if_purgeaddrs(struct ifnet *ifp) 909 { 910 struct ifaddr *ifa, *next; 911 912 /* XXX cannot hold IF_ADDR_WLOCK over called functions. */ 913 TAILQ_FOREACH_SAFE(ifa, &ifp->if_addrhead, ifa_link, next) { 914 if (ifa->ifa_addr->sa_family == AF_LINK) 915 continue; 916 #ifdef INET 917 /* XXX: Ugly!! ad hoc just for INET */ 918 if (ifa->ifa_addr->sa_family == AF_INET) { 919 struct ifaliasreq ifr; 920 921 bzero(&ifr, sizeof(ifr)); 922 ifr.ifra_addr = *ifa->ifa_addr; 923 if (ifa->ifa_dstaddr) 924 ifr.ifra_broadaddr = *ifa->ifa_dstaddr; 925 if (in_control(NULL, SIOCDIFADDR, (caddr_t)&ifr, ifp, 926 NULL) == 0) 927 continue; 928 } 929 #endif /* INET */ 930 #ifdef INET6 931 if (ifa->ifa_addr->sa_family == AF_INET6) { 932 in6_purgeaddr(ifa); 933 /* ifp_addrhead is already updated */ 934 continue; 935 } 936 #endif /* INET6 */ 937 IF_ADDR_WLOCK(ifp); 938 TAILQ_REMOVE(&ifp->if_addrhead, ifa, ifa_link); 939 IF_ADDR_WUNLOCK(ifp); 940 ifa_free(ifa); 941 } 942 } 943 944 /* 945 * Remove any multicast network addresses from an interface when an ifnet 946 * is going away. 947 */ 948 static void 949 if_purgemaddrs(struct ifnet *ifp) 950 { 951 struct ifmultiaddr *ifma; 952 struct ifmultiaddr *next; 953 954 IF_ADDR_WLOCK(ifp); 955 TAILQ_FOREACH_SAFE(ifma, &ifp->if_multiaddrs, ifma_link, next) 956 if_delmulti_locked(ifp, ifma, 1); 957 IF_ADDR_WUNLOCK(ifp); 958 } 959 960 /* 961 * Detach an interface, removing it from the list of "active" interfaces. 962 * If vmove flag is set on entry to if_detach_internal(), perform only a 963 * limited subset of cleanup tasks, given that we are moving an ifnet from 964 * one vnet to another, where it must be fully operational. 965 * 966 * XXXRW: There are some significant questions about event ordering, and 967 * how to prevent things from starting to use the interface during detach. 968 */ 969 void 970 if_detach(struct ifnet *ifp) 971 { 972 973 CURVNET_SET_QUIET(ifp->if_vnet); 974 if_detach_internal(ifp, 0, NULL); 975 CURVNET_RESTORE(); 976 } 977 978 /* 979 * The vmove flag, if set, indicates that we are called from a callpath 980 * that is moving an interface to a different vnet instance. 981 * 982 * The shutdown flag, if set, indicates that we are called in the 983 * process of shutting down a vnet instance. Currently only the 984 * vnet_if_return SYSUNINIT function sets it. Note: we can be called 985 * on a vnet instance shutdown without this flag being set, e.g., when 986 * the cloned interfaces are destoyed as first thing of teardown. 987 */ 988 static int 989 if_detach_internal(struct ifnet *ifp, int vmove, struct if_clone **ifcp) 990 { 991 struct ifaddr *ifa; 992 int i; 993 struct domain *dp; 994 struct ifnet *iter; 995 int found = 0; 996 #ifdef VIMAGE 997 int shutdown; 998 999 shutdown = (ifp->if_vnet->vnet_state > SI_SUB_VNET && 1000 ifp->if_vnet->vnet_state < SI_SUB_VNET_DONE) ? 1 : 0; 1001 #endif 1002 IFNET_WLOCK(); 1003 TAILQ_FOREACH(iter, &V_ifnet, if_link) 1004 if (iter == ifp) { 1005 TAILQ_REMOVE(&V_ifnet, ifp, if_link); 1006 found = 1; 1007 break; 1008 } 1009 IFNET_WUNLOCK(); 1010 if (!found) { 1011 /* 1012 * While we would want to panic here, we cannot 1013 * guarantee that the interface is indeed still on 1014 * the list given we don't hold locks all the way. 1015 */ 1016 return (ENOENT); 1017 #if 0 1018 if (vmove) 1019 panic("%s: ifp=%p not on the ifnet tailq %p", 1020 __func__, ifp, &V_ifnet); 1021 else 1022 return; /* XXX this should panic as well? */ 1023 #endif 1024 } 1025 1026 /* 1027 * At this point we know the interface still was on the ifnet list 1028 * and we removed it so we are in a stable state. 1029 */ 1030 #ifdef VIMAGE 1031 curvnet->vnet_ifcnt--; 1032 #endif 1033 1034 /* 1035 * In any case (destroy or vmove) detach us from the groups 1036 * and remove/wait for pending events on the taskq. 1037 * XXX-BZ in theory an interface could still enqueue a taskq change? 1038 */ 1039 if_delgroups(ifp); 1040 1041 taskqueue_drain(taskqueue_swi, &ifp->if_linktask); 1042 1043 /* 1044 * Check if this is a cloned interface or not. Must do even if 1045 * shutting down as a if_vmove_reclaim() would move the ifp and 1046 * the if_clone_addgroup() will have a corrupted string overwise 1047 * from a gibberish pointer. 1048 */ 1049 if (vmove && ifcp != NULL) 1050 *ifcp = if_clone_findifc(ifp); 1051 1052 if_down(ifp); 1053 1054 #ifdef VIMAGE 1055 /* 1056 * On VNET shutdown abort here as the stack teardown will do all 1057 * the work top-down for us. 1058 */ 1059 if (shutdown) { 1060 /* 1061 * In case of a vmove we are done here without error. 1062 * If we would signal an error it would lead to the same 1063 * abort as if we did not find the ifnet anymore. 1064 * if_detach() calls us in void context and does not care 1065 * about an early abort notification, so life is splendid :) 1066 */ 1067 goto finish_vnet_shutdown; 1068 } 1069 #endif 1070 1071 /* 1072 * At this point we are not tearing down a VNET and are either 1073 * going to destroy or vmove the interface and have to cleanup 1074 * accordingly. 1075 */ 1076 1077 /* 1078 * Remove routes and flush queues. 1079 */ 1080 #ifdef ALTQ 1081 if (ALTQ_IS_ENABLED(&ifp->if_snd)) 1082 altq_disable(&ifp->if_snd); 1083 if (ALTQ_IS_ATTACHED(&ifp->if_snd)) 1084 altq_detach(&ifp->if_snd); 1085 #endif 1086 1087 if_purgeaddrs(ifp); 1088 1089 #ifdef INET 1090 in_ifdetach(ifp); 1091 #endif 1092 1093 #ifdef INET6 1094 /* 1095 * Remove all IPv6 kernel structs related to ifp. This should be done 1096 * before removing routing entries below, since IPv6 interface direct 1097 * routes are expected to be removed by the IPv6-specific kernel API. 1098 * Otherwise, the kernel will detect some inconsistency and bark it. 1099 */ 1100 in6_ifdetach(ifp); 1101 #endif 1102 if_purgemaddrs(ifp); 1103 1104 /* Announce that the interface is gone. */ 1105 rt_ifannouncemsg(ifp, IFAN_DEPARTURE); 1106 EVENTHANDLER_INVOKE(ifnet_departure_event, ifp); 1107 if (IS_DEFAULT_VNET(curvnet)) 1108 devctl_notify("IFNET", ifp->if_xname, "DETACH", NULL); 1109 1110 if (!vmove) { 1111 /* 1112 * Prevent further calls into the device driver via ifnet. 1113 */ 1114 if_dead(ifp); 1115 1116 /* 1117 * Remove link ifaddr pointer and maybe decrement if_index. 1118 * Clean up all addresses. 1119 */ 1120 free(ifp->if_hw_addr, M_IFADDR); 1121 ifp->if_hw_addr = NULL; 1122 ifp->if_addr = NULL; 1123 1124 /* We can now free link ifaddr. */ 1125 IF_ADDR_WLOCK(ifp); 1126 if (!TAILQ_EMPTY(&ifp->if_addrhead)) { 1127 ifa = TAILQ_FIRST(&ifp->if_addrhead); 1128 TAILQ_REMOVE(&ifp->if_addrhead, ifa, ifa_link); 1129 IF_ADDR_WUNLOCK(ifp); 1130 ifa_free(ifa); 1131 } else 1132 IF_ADDR_WUNLOCK(ifp); 1133 } 1134 1135 rt_flushifroutes(ifp); 1136 1137 #ifdef VIMAGE 1138 finish_vnet_shutdown: 1139 #endif 1140 /* 1141 * We cannot hold the lock over dom_ifdetach calls as they might 1142 * sleep, for example trying to drain a callout, thus open up the 1143 * theoretical race with re-attaching. 1144 */ 1145 IF_AFDATA_LOCK(ifp); 1146 i = ifp->if_afdata_initialized; 1147 ifp->if_afdata_initialized = 0; 1148 IF_AFDATA_UNLOCK(ifp); 1149 for (dp = domains; i > 0 && dp; dp = dp->dom_next) { 1150 if (dp->dom_ifdetach && ifp->if_afdata[dp->dom_family]) { 1151 (*dp->dom_ifdetach)(ifp, 1152 ifp->if_afdata[dp->dom_family]); 1153 ifp->if_afdata[dp->dom_family] = NULL; 1154 } 1155 } 1156 1157 return (0); 1158 } 1159 1160 #ifdef VIMAGE 1161 /* 1162 * if_vmove() performs a limited version of if_detach() in current 1163 * vnet and if_attach()es the ifnet to the vnet specified as 2nd arg. 1164 * An attempt is made to shrink if_index in current vnet, find an 1165 * unused if_index in target vnet and calls if_grow() if necessary, 1166 * and finally find an unused if_xname for the target vnet. 1167 */ 1168 static void 1169 if_vmove(struct ifnet *ifp, struct vnet *new_vnet) 1170 { 1171 struct if_clone *ifc; 1172 u_int bif_dlt, bif_hdrlen; 1173 int rc; 1174 1175 /* 1176 * if_detach_internal() will call the eventhandler to notify 1177 * interface departure. That will detach if_bpf. We need to 1178 * safe the dlt and hdrlen so we can re-attach it later. 1179 */ 1180 bpf_get_bp_params(ifp->if_bpf, &bif_dlt, &bif_hdrlen); 1181 1182 /* 1183 * Detach from current vnet, but preserve LLADDR info, do not 1184 * mark as dead etc. so that the ifnet can be reattached later. 1185 * If we cannot find it, we lost the race to someone else. 1186 */ 1187 rc = if_detach_internal(ifp, 1, &ifc); 1188 if (rc != 0) 1189 return; 1190 1191 /* 1192 * Unlink the ifnet from ifindex_table[] in current vnet, and shrink 1193 * the if_index for that vnet if possible. 1194 * 1195 * NOTE: IFNET_WLOCK/IFNET_WUNLOCK() are assumed to be unvirtualized, 1196 * or we'd lock on one vnet and unlock on another. 1197 */ 1198 IFNET_WLOCK(); 1199 ifindex_free_locked(ifp->if_index); 1200 IFNET_WUNLOCK(); 1201 1202 /* 1203 * Perform interface-specific reassignment tasks, if provided by 1204 * the driver. 1205 */ 1206 if (ifp->if_reassign != NULL) 1207 ifp->if_reassign(ifp, new_vnet, NULL); 1208 1209 /* 1210 * Switch to the context of the target vnet. 1211 */ 1212 CURVNET_SET_QUIET(new_vnet); 1213 1214 IFNET_WLOCK(); 1215 ifp->if_index = ifindex_alloc(); 1216 ifnet_setbyindex_locked(ifp->if_index, ifp); 1217 IFNET_WUNLOCK(); 1218 1219 if_attach_internal(ifp, 1, ifc); 1220 1221 if (ifp->if_bpf == NULL) 1222 bpfattach(ifp, bif_dlt, bif_hdrlen); 1223 1224 CURVNET_RESTORE(); 1225 } 1226 1227 /* 1228 * Move an ifnet to or from another child prison/vnet, specified by the jail id. 1229 */ 1230 static int 1231 if_vmove_loan(struct thread *td, struct ifnet *ifp, char *ifname, int jid) 1232 { 1233 struct prison *pr; 1234 struct ifnet *difp; 1235 int shutdown; 1236 1237 /* Try to find the prison within our visibility. */ 1238 sx_slock(&allprison_lock); 1239 pr = prison_find_child(td->td_ucred->cr_prison, jid); 1240 sx_sunlock(&allprison_lock); 1241 if (pr == NULL) 1242 return (ENXIO); 1243 prison_hold_locked(pr); 1244 mtx_unlock(&pr->pr_mtx); 1245 1246 /* Do not try to move the iface from and to the same prison. */ 1247 if (pr->pr_vnet == ifp->if_vnet) { 1248 prison_free(pr); 1249 return (EEXIST); 1250 } 1251 1252 /* Make sure the named iface does not exists in the dst. prison/vnet. */ 1253 /* XXX Lock interfaces to avoid races. */ 1254 CURVNET_SET_QUIET(pr->pr_vnet); 1255 difp = ifunit(ifname); 1256 if (difp != NULL) { 1257 CURVNET_RESTORE(); 1258 prison_free(pr); 1259 return (EEXIST); 1260 } 1261 1262 /* Make sure the VNET is stable. */ 1263 shutdown = (ifp->if_vnet->vnet_state > SI_SUB_VNET && 1264 ifp->if_vnet->vnet_state < SI_SUB_VNET_DONE) ? 1 : 0; 1265 if (shutdown) { 1266 CURVNET_RESTORE(); 1267 prison_free(pr); 1268 return (EBUSY); 1269 } 1270 CURVNET_RESTORE(); 1271 1272 /* Move the interface into the child jail/vnet. */ 1273 if_vmove(ifp, pr->pr_vnet); 1274 1275 /* Report the new if_xname back to the userland. */ 1276 sprintf(ifname, "%s", ifp->if_xname); 1277 1278 prison_free(pr); 1279 return (0); 1280 } 1281 1282 static int 1283 if_vmove_reclaim(struct thread *td, char *ifname, int jid) 1284 { 1285 struct prison *pr; 1286 struct vnet *vnet_dst; 1287 struct ifnet *ifp; 1288 int shutdown; 1289 1290 /* Try to find the prison within our visibility. */ 1291 sx_slock(&allprison_lock); 1292 pr = prison_find_child(td->td_ucred->cr_prison, jid); 1293 sx_sunlock(&allprison_lock); 1294 if (pr == NULL) 1295 return (ENXIO); 1296 prison_hold_locked(pr); 1297 mtx_unlock(&pr->pr_mtx); 1298 1299 /* Make sure the named iface exists in the source prison/vnet. */ 1300 CURVNET_SET(pr->pr_vnet); 1301 ifp = ifunit(ifname); /* XXX Lock to avoid races. */ 1302 if (ifp == NULL) { 1303 CURVNET_RESTORE(); 1304 prison_free(pr); 1305 return (ENXIO); 1306 } 1307 1308 /* Do not try to move the iface from and to the same prison. */ 1309 vnet_dst = TD_TO_VNET(td); 1310 if (vnet_dst == ifp->if_vnet) { 1311 CURVNET_RESTORE(); 1312 prison_free(pr); 1313 return (EEXIST); 1314 } 1315 1316 /* Make sure the VNET is stable. */ 1317 shutdown = (ifp->if_vnet->vnet_state > SI_SUB_VNET && 1318 ifp->if_vnet->vnet_state < SI_SUB_VNET_DONE) ? 1 : 0; 1319 if (shutdown) { 1320 CURVNET_RESTORE(); 1321 prison_free(pr); 1322 return (EBUSY); 1323 } 1324 1325 /* Get interface back from child jail/vnet. */ 1326 if_vmove(ifp, vnet_dst); 1327 CURVNET_RESTORE(); 1328 1329 /* Report the new if_xname back to the userland. */ 1330 sprintf(ifname, "%s", ifp->if_xname); 1331 1332 prison_free(pr); 1333 return (0); 1334 } 1335 #endif /* VIMAGE */ 1336 1337 /* 1338 * Add a group to an interface 1339 */ 1340 int 1341 if_addgroup(struct ifnet *ifp, const char *groupname) 1342 { 1343 struct ifg_list *ifgl; 1344 struct ifg_group *ifg = NULL; 1345 struct ifg_member *ifgm; 1346 int new = 0; 1347 1348 if (groupname[0] && groupname[strlen(groupname) - 1] >= '0' && 1349 groupname[strlen(groupname) - 1] <= '9') 1350 return (EINVAL); 1351 1352 IFNET_WLOCK(); 1353 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next) 1354 if (!strcmp(ifgl->ifgl_group->ifg_group, groupname)) { 1355 IFNET_WUNLOCK(); 1356 return (EEXIST); 1357 } 1358 1359 if ((ifgl = (struct ifg_list *)malloc(sizeof(struct ifg_list), M_TEMP, 1360 M_NOWAIT)) == NULL) { 1361 IFNET_WUNLOCK(); 1362 return (ENOMEM); 1363 } 1364 1365 if ((ifgm = (struct ifg_member *)malloc(sizeof(struct ifg_member), 1366 M_TEMP, M_NOWAIT)) == NULL) { 1367 free(ifgl, M_TEMP); 1368 IFNET_WUNLOCK(); 1369 return (ENOMEM); 1370 } 1371 1372 TAILQ_FOREACH(ifg, &V_ifg_head, ifg_next) 1373 if (!strcmp(ifg->ifg_group, groupname)) 1374 break; 1375 1376 if (ifg == NULL) { 1377 if ((ifg = (struct ifg_group *)malloc(sizeof(struct ifg_group), 1378 M_TEMP, M_NOWAIT)) == NULL) { 1379 free(ifgl, M_TEMP); 1380 free(ifgm, M_TEMP); 1381 IFNET_WUNLOCK(); 1382 return (ENOMEM); 1383 } 1384 strlcpy(ifg->ifg_group, groupname, sizeof(ifg->ifg_group)); 1385 ifg->ifg_refcnt = 0; 1386 TAILQ_INIT(&ifg->ifg_members); 1387 TAILQ_INSERT_TAIL(&V_ifg_head, ifg, ifg_next); 1388 new = 1; 1389 } 1390 1391 ifg->ifg_refcnt++; 1392 ifgl->ifgl_group = ifg; 1393 ifgm->ifgm_ifp = ifp; 1394 1395 IF_ADDR_WLOCK(ifp); 1396 TAILQ_INSERT_TAIL(&ifg->ifg_members, ifgm, ifgm_next); 1397 TAILQ_INSERT_TAIL(&ifp->if_groups, ifgl, ifgl_next); 1398 IF_ADDR_WUNLOCK(ifp); 1399 1400 IFNET_WUNLOCK(); 1401 1402 if (new) 1403 EVENTHANDLER_INVOKE(group_attach_event, ifg); 1404 EVENTHANDLER_INVOKE(group_change_event, groupname); 1405 1406 return (0); 1407 } 1408 1409 /* 1410 * Remove a group from an interface 1411 */ 1412 int 1413 if_delgroup(struct ifnet *ifp, const char *groupname) 1414 { 1415 struct ifg_list *ifgl; 1416 struct ifg_member *ifgm; 1417 1418 IFNET_WLOCK(); 1419 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next) 1420 if (!strcmp(ifgl->ifgl_group->ifg_group, groupname)) 1421 break; 1422 if (ifgl == NULL) { 1423 IFNET_WUNLOCK(); 1424 return (ENOENT); 1425 } 1426 1427 IF_ADDR_WLOCK(ifp); 1428 TAILQ_REMOVE(&ifp->if_groups, ifgl, ifgl_next); 1429 IF_ADDR_WUNLOCK(ifp); 1430 1431 TAILQ_FOREACH(ifgm, &ifgl->ifgl_group->ifg_members, ifgm_next) 1432 if (ifgm->ifgm_ifp == ifp) 1433 break; 1434 1435 if (ifgm != NULL) { 1436 TAILQ_REMOVE(&ifgl->ifgl_group->ifg_members, ifgm, ifgm_next); 1437 free(ifgm, M_TEMP); 1438 } 1439 1440 if (--ifgl->ifgl_group->ifg_refcnt == 0) { 1441 TAILQ_REMOVE(&V_ifg_head, ifgl->ifgl_group, ifg_next); 1442 IFNET_WUNLOCK(); 1443 EVENTHANDLER_INVOKE(group_detach_event, ifgl->ifgl_group); 1444 free(ifgl->ifgl_group, M_TEMP); 1445 } else 1446 IFNET_WUNLOCK(); 1447 1448 free(ifgl, M_TEMP); 1449 1450 EVENTHANDLER_INVOKE(group_change_event, groupname); 1451 1452 return (0); 1453 } 1454 1455 /* 1456 * Remove an interface from all groups 1457 */ 1458 static void 1459 if_delgroups(struct ifnet *ifp) 1460 { 1461 struct ifg_list *ifgl; 1462 struct ifg_member *ifgm; 1463 char groupname[IFNAMSIZ]; 1464 1465 IFNET_WLOCK(); 1466 while (!TAILQ_EMPTY(&ifp->if_groups)) { 1467 ifgl = TAILQ_FIRST(&ifp->if_groups); 1468 1469 strlcpy(groupname, ifgl->ifgl_group->ifg_group, IFNAMSIZ); 1470 1471 IF_ADDR_WLOCK(ifp); 1472 TAILQ_REMOVE(&ifp->if_groups, ifgl, ifgl_next); 1473 IF_ADDR_WUNLOCK(ifp); 1474 1475 TAILQ_FOREACH(ifgm, &ifgl->ifgl_group->ifg_members, ifgm_next) 1476 if (ifgm->ifgm_ifp == ifp) 1477 break; 1478 1479 if (ifgm != NULL) { 1480 TAILQ_REMOVE(&ifgl->ifgl_group->ifg_members, ifgm, 1481 ifgm_next); 1482 free(ifgm, M_TEMP); 1483 } 1484 1485 if (--ifgl->ifgl_group->ifg_refcnt == 0) { 1486 TAILQ_REMOVE(&V_ifg_head, ifgl->ifgl_group, ifg_next); 1487 IFNET_WUNLOCK(); 1488 EVENTHANDLER_INVOKE(group_detach_event, 1489 ifgl->ifgl_group); 1490 free(ifgl->ifgl_group, M_TEMP); 1491 } else 1492 IFNET_WUNLOCK(); 1493 1494 free(ifgl, M_TEMP); 1495 1496 EVENTHANDLER_INVOKE(group_change_event, groupname); 1497 1498 IFNET_WLOCK(); 1499 } 1500 IFNET_WUNLOCK(); 1501 } 1502 1503 /* 1504 * Stores all groups from an interface in memory pointed 1505 * to by data 1506 */ 1507 static int 1508 if_getgroup(struct ifgroupreq *data, struct ifnet *ifp) 1509 { 1510 int len, error; 1511 struct ifg_list *ifgl; 1512 struct ifg_req ifgrq, *ifgp; 1513 struct ifgroupreq *ifgr = data; 1514 1515 if (ifgr->ifgr_len == 0) { 1516 IF_ADDR_RLOCK(ifp); 1517 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next) 1518 ifgr->ifgr_len += sizeof(struct ifg_req); 1519 IF_ADDR_RUNLOCK(ifp); 1520 return (0); 1521 } 1522 1523 len = ifgr->ifgr_len; 1524 ifgp = ifgr->ifgr_groups; 1525 /* XXX: wire */ 1526 IF_ADDR_RLOCK(ifp); 1527 TAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next) { 1528 if (len < sizeof(ifgrq)) { 1529 IF_ADDR_RUNLOCK(ifp); 1530 return (EINVAL); 1531 } 1532 bzero(&ifgrq, sizeof ifgrq); 1533 strlcpy(ifgrq.ifgrq_group, ifgl->ifgl_group->ifg_group, 1534 sizeof(ifgrq.ifgrq_group)); 1535 if ((error = copyout(&ifgrq, ifgp, sizeof(struct ifg_req)))) { 1536 IF_ADDR_RUNLOCK(ifp); 1537 return (error); 1538 } 1539 len -= sizeof(ifgrq); 1540 ifgp++; 1541 } 1542 IF_ADDR_RUNLOCK(ifp); 1543 1544 return (0); 1545 } 1546 1547 /* 1548 * Stores all members of a group in memory pointed to by data 1549 */ 1550 static int 1551 if_getgroupmembers(struct ifgroupreq *data) 1552 { 1553 struct ifgroupreq *ifgr = data; 1554 struct ifg_group *ifg; 1555 struct ifg_member *ifgm; 1556 struct ifg_req ifgrq, *ifgp; 1557 int len, error; 1558 1559 IFNET_RLOCK(); 1560 TAILQ_FOREACH(ifg, &V_ifg_head, ifg_next) 1561 if (!strcmp(ifg->ifg_group, ifgr->ifgr_name)) 1562 break; 1563 if (ifg == NULL) { 1564 IFNET_RUNLOCK(); 1565 return (ENOENT); 1566 } 1567 1568 if (ifgr->ifgr_len == 0) { 1569 TAILQ_FOREACH(ifgm, &ifg->ifg_members, ifgm_next) 1570 ifgr->ifgr_len += sizeof(ifgrq); 1571 IFNET_RUNLOCK(); 1572 return (0); 1573 } 1574 1575 len = ifgr->ifgr_len; 1576 ifgp = ifgr->ifgr_groups; 1577 TAILQ_FOREACH(ifgm, &ifg->ifg_members, ifgm_next) { 1578 if (len < sizeof(ifgrq)) { 1579 IFNET_RUNLOCK(); 1580 return (EINVAL); 1581 } 1582 bzero(&ifgrq, sizeof ifgrq); 1583 strlcpy(ifgrq.ifgrq_member, ifgm->ifgm_ifp->if_xname, 1584 sizeof(ifgrq.ifgrq_member)); 1585 if ((error = copyout(&ifgrq, ifgp, sizeof(struct ifg_req)))) { 1586 IFNET_RUNLOCK(); 1587 return (error); 1588 } 1589 len -= sizeof(ifgrq); 1590 ifgp++; 1591 } 1592 IFNET_RUNLOCK(); 1593 1594 return (0); 1595 } 1596 1597 /* 1598 * Return counter values from counter(9)s stored in ifnet. 1599 */ 1600 uint64_t 1601 if_get_counter_default(struct ifnet *ifp, ift_counter cnt) 1602 { 1603 1604 KASSERT(cnt < IFCOUNTERS, ("%s: invalid cnt %d", __func__, cnt)); 1605 1606 return (counter_u64_fetch(ifp->if_counters[cnt])); 1607 } 1608 1609 /* 1610 * Increase an ifnet counter. Usually used for counters shared 1611 * between the stack and a driver, but function supports them all. 1612 */ 1613 void 1614 if_inc_counter(struct ifnet *ifp, ift_counter cnt, int64_t inc) 1615 { 1616 1617 KASSERT(cnt < IFCOUNTERS, ("%s: invalid cnt %d", __func__, cnt)); 1618 1619 counter_u64_add(ifp->if_counters[cnt], inc); 1620 } 1621 1622 /* 1623 * Copy data from ifnet to userland API structure if_data. 1624 */ 1625 void 1626 if_data_copy(struct ifnet *ifp, struct if_data *ifd) 1627 { 1628 1629 ifd->ifi_type = ifp->if_type; 1630 ifd->ifi_physical = 0; 1631 ifd->ifi_addrlen = ifp->if_addrlen; 1632 ifd->ifi_hdrlen = ifp->if_hdrlen; 1633 ifd->ifi_link_state = ifp->if_link_state; 1634 ifd->ifi_vhid = 0; 1635 ifd->ifi_datalen = sizeof(struct if_data); 1636 ifd->ifi_mtu = ifp->if_mtu; 1637 ifd->ifi_metric = ifp->if_metric; 1638 ifd->ifi_baudrate = ifp->if_baudrate; 1639 ifd->ifi_hwassist = ifp->if_hwassist; 1640 ifd->ifi_epoch = ifp->if_epoch; 1641 ifd->ifi_lastchange = ifp->if_lastchange; 1642 1643 ifd->ifi_ipackets = ifp->if_get_counter(ifp, IFCOUNTER_IPACKETS); 1644 ifd->ifi_ierrors = ifp->if_get_counter(ifp, IFCOUNTER_IERRORS); 1645 ifd->ifi_opackets = ifp->if_get_counter(ifp, IFCOUNTER_OPACKETS); 1646 ifd->ifi_oerrors = ifp->if_get_counter(ifp, IFCOUNTER_OERRORS); 1647 ifd->ifi_collisions = ifp->if_get_counter(ifp, IFCOUNTER_COLLISIONS); 1648 ifd->ifi_ibytes = ifp->if_get_counter(ifp, IFCOUNTER_IBYTES); 1649 ifd->ifi_obytes = ifp->if_get_counter(ifp, IFCOUNTER_OBYTES); 1650 ifd->ifi_imcasts = ifp->if_get_counter(ifp, IFCOUNTER_IMCASTS); 1651 ifd->ifi_omcasts = ifp->if_get_counter(ifp, IFCOUNTER_OMCASTS); 1652 ifd->ifi_iqdrops = ifp->if_get_counter(ifp, IFCOUNTER_IQDROPS); 1653 ifd->ifi_oqdrops = ifp->if_get_counter(ifp, IFCOUNTER_OQDROPS); 1654 ifd->ifi_noproto = ifp->if_get_counter(ifp, IFCOUNTER_NOPROTO); 1655 } 1656 1657 /* 1658 * Wrapper functions for struct ifnet address list locking macros. These are 1659 * used by kernel modules to avoid encoding programming interface or binary 1660 * interface assumptions that may be violated when kernel-internal locking 1661 * approaches change. 1662 */ 1663 void 1664 if_addr_rlock(struct ifnet *ifp) 1665 { 1666 1667 IF_ADDR_RLOCK(ifp); 1668 } 1669 1670 void 1671 if_addr_runlock(struct ifnet *ifp) 1672 { 1673 1674 IF_ADDR_RUNLOCK(ifp); 1675 } 1676 1677 void 1678 if_maddr_rlock(if_t ifp) 1679 { 1680 1681 IF_ADDR_RLOCK((struct ifnet *)ifp); 1682 } 1683 1684 void 1685 if_maddr_runlock(if_t ifp) 1686 { 1687 1688 IF_ADDR_RUNLOCK((struct ifnet *)ifp); 1689 } 1690 1691 /* 1692 * Initialization, destruction and refcounting functions for ifaddrs. 1693 */ 1694 struct ifaddr * 1695 ifa_alloc(size_t size, int flags) 1696 { 1697 struct ifaddr *ifa; 1698 1699 KASSERT(size >= sizeof(struct ifaddr), 1700 ("%s: invalid size %zu", __func__, size)); 1701 1702 ifa = malloc(size, M_IFADDR, M_ZERO | flags); 1703 if (ifa == NULL) 1704 return (NULL); 1705 1706 if ((ifa->ifa_opackets = counter_u64_alloc(flags)) == NULL) 1707 goto fail; 1708 if ((ifa->ifa_ipackets = counter_u64_alloc(flags)) == NULL) 1709 goto fail; 1710 if ((ifa->ifa_obytes = counter_u64_alloc(flags)) == NULL) 1711 goto fail; 1712 if ((ifa->ifa_ibytes = counter_u64_alloc(flags)) == NULL) 1713 goto fail; 1714 1715 refcount_init(&ifa->ifa_refcnt, 1); 1716 1717 return (ifa); 1718 1719 fail: 1720 /* free(NULL) is okay */ 1721 counter_u64_free(ifa->ifa_opackets); 1722 counter_u64_free(ifa->ifa_ipackets); 1723 counter_u64_free(ifa->ifa_obytes); 1724 counter_u64_free(ifa->ifa_ibytes); 1725 free(ifa, M_IFADDR); 1726 1727 return (NULL); 1728 } 1729 1730 void 1731 ifa_ref(struct ifaddr *ifa) 1732 { 1733 1734 refcount_acquire(&ifa->ifa_refcnt); 1735 } 1736 1737 void 1738 ifa_free(struct ifaddr *ifa) 1739 { 1740 1741 if (refcount_release(&ifa->ifa_refcnt)) { 1742 counter_u64_free(ifa->ifa_opackets); 1743 counter_u64_free(ifa->ifa_ipackets); 1744 counter_u64_free(ifa->ifa_obytes); 1745 counter_u64_free(ifa->ifa_ibytes); 1746 free(ifa, M_IFADDR); 1747 } 1748 } 1749 1750 static int 1751 ifa_maintain_loopback_route(int cmd, const char *otype, struct ifaddr *ifa, 1752 struct sockaddr *ia) 1753 { 1754 int error; 1755 struct rt_addrinfo info; 1756 struct sockaddr_dl null_sdl; 1757 struct ifnet *ifp; 1758 1759 ifp = ifa->ifa_ifp; 1760 1761 bzero(&info, sizeof(info)); 1762 if (cmd != RTM_DELETE) 1763 info.rti_ifp = V_loif; 1764 info.rti_flags = ifa->ifa_flags | RTF_HOST | RTF_STATIC | RTF_PINNED; 1765 info.rti_info[RTAX_DST] = ia; 1766 info.rti_info[RTAX_GATEWAY] = (struct sockaddr *)&null_sdl; 1767 link_init_sdl(ifp, (struct sockaddr *)&null_sdl, ifp->if_type); 1768 1769 error = rtrequest1_fib(cmd, &info, NULL, ifp->if_fib); 1770 1771 if (error != 0) 1772 log(LOG_DEBUG, "%s: %s failed for interface %s: %u\n", 1773 __func__, otype, if_name(ifp), error); 1774 1775 return (error); 1776 } 1777 1778 int 1779 ifa_add_loopback_route(struct ifaddr *ifa, struct sockaddr *ia) 1780 { 1781 1782 return (ifa_maintain_loopback_route(RTM_ADD, "insertion", ifa, ia)); 1783 } 1784 1785 int 1786 ifa_del_loopback_route(struct ifaddr *ifa, struct sockaddr *ia) 1787 { 1788 1789 return (ifa_maintain_loopback_route(RTM_DELETE, "deletion", ifa, ia)); 1790 } 1791 1792 int 1793 ifa_switch_loopback_route(struct ifaddr *ifa, struct sockaddr *ia) 1794 { 1795 1796 return (ifa_maintain_loopback_route(RTM_CHANGE, "switch", ifa, ia)); 1797 } 1798 1799 /* 1800 * XXX: Because sockaddr_dl has deeper structure than the sockaddr 1801 * structs used to represent other address families, it is necessary 1802 * to perform a different comparison. 1803 */ 1804 1805 #define sa_dl_equal(a1, a2) \ 1806 ((((const struct sockaddr_dl *)(a1))->sdl_len == \ 1807 ((const struct sockaddr_dl *)(a2))->sdl_len) && \ 1808 (bcmp(CLLADDR((const struct sockaddr_dl *)(a1)), \ 1809 CLLADDR((const struct sockaddr_dl *)(a2)), \ 1810 ((const struct sockaddr_dl *)(a1))->sdl_alen) == 0)) 1811 1812 /* 1813 * Locate an interface based on a complete address. 1814 */ 1815 /*ARGSUSED*/ 1816 static struct ifaddr * 1817 ifa_ifwithaddr_internal(const struct sockaddr *addr, int getref) 1818 { 1819 struct ifnet *ifp; 1820 struct ifaddr *ifa; 1821 1822 IFNET_RLOCK_NOSLEEP(); 1823 TAILQ_FOREACH(ifp, &V_ifnet, if_link) { 1824 IF_ADDR_RLOCK(ifp); 1825 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1826 if (ifa->ifa_addr->sa_family != addr->sa_family) 1827 continue; 1828 if (sa_equal(addr, ifa->ifa_addr)) { 1829 if (getref) 1830 ifa_ref(ifa); 1831 IF_ADDR_RUNLOCK(ifp); 1832 goto done; 1833 } 1834 /* IP6 doesn't have broadcast */ 1835 if ((ifp->if_flags & IFF_BROADCAST) && 1836 ifa->ifa_broadaddr && 1837 ifa->ifa_broadaddr->sa_len != 0 && 1838 sa_equal(ifa->ifa_broadaddr, addr)) { 1839 if (getref) 1840 ifa_ref(ifa); 1841 IF_ADDR_RUNLOCK(ifp); 1842 goto done; 1843 } 1844 } 1845 IF_ADDR_RUNLOCK(ifp); 1846 } 1847 ifa = NULL; 1848 done: 1849 IFNET_RUNLOCK_NOSLEEP(); 1850 return (ifa); 1851 } 1852 1853 struct ifaddr * 1854 ifa_ifwithaddr(const struct sockaddr *addr) 1855 { 1856 1857 return (ifa_ifwithaddr_internal(addr, 1)); 1858 } 1859 1860 int 1861 ifa_ifwithaddr_check(const struct sockaddr *addr) 1862 { 1863 1864 return (ifa_ifwithaddr_internal(addr, 0) != NULL); 1865 } 1866 1867 /* 1868 * Locate an interface based on the broadcast address. 1869 */ 1870 /* ARGSUSED */ 1871 struct ifaddr * 1872 ifa_ifwithbroadaddr(const struct sockaddr *addr, int fibnum) 1873 { 1874 struct ifnet *ifp; 1875 struct ifaddr *ifa; 1876 1877 IFNET_RLOCK_NOSLEEP(); 1878 TAILQ_FOREACH(ifp, &V_ifnet, if_link) { 1879 if ((fibnum != RT_ALL_FIBS) && (ifp->if_fib != fibnum)) 1880 continue; 1881 IF_ADDR_RLOCK(ifp); 1882 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1883 if (ifa->ifa_addr->sa_family != addr->sa_family) 1884 continue; 1885 if ((ifp->if_flags & IFF_BROADCAST) && 1886 ifa->ifa_broadaddr && 1887 ifa->ifa_broadaddr->sa_len != 0 && 1888 sa_equal(ifa->ifa_broadaddr, addr)) { 1889 ifa_ref(ifa); 1890 IF_ADDR_RUNLOCK(ifp); 1891 goto done; 1892 } 1893 } 1894 IF_ADDR_RUNLOCK(ifp); 1895 } 1896 ifa = NULL; 1897 done: 1898 IFNET_RUNLOCK_NOSLEEP(); 1899 return (ifa); 1900 } 1901 1902 /* 1903 * Locate the point to point interface with a given destination address. 1904 */ 1905 /*ARGSUSED*/ 1906 struct ifaddr * 1907 ifa_ifwithdstaddr(const struct sockaddr *addr, int fibnum) 1908 { 1909 struct ifnet *ifp; 1910 struct ifaddr *ifa; 1911 1912 IFNET_RLOCK_NOSLEEP(); 1913 TAILQ_FOREACH(ifp, &V_ifnet, if_link) { 1914 if ((ifp->if_flags & IFF_POINTOPOINT) == 0) 1915 continue; 1916 if ((fibnum != RT_ALL_FIBS) && (ifp->if_fib != fibnum)) 1917 continue; 1918 IF_ADDR_RLOCK(ifp); 1919 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1920 if (ifa->ifa_addr->sa_family != addr->sa_family) 1921 continue; 1922 if (ifa->ifa_dstaddr != NULL && 1923 sa_equal(addr, ifa->ifa_dstaddr)) { 1924 ifa_ref(ifa); 1925 IF_ADDR_RUNLOCK(ifp); 1926 goto done; 1927 } 1928 } 1929 IF_ADDR_RUNLOCK(ifp); 1930 } 1931 ifa = NULL; 1932 done: 1933 IFNET_RUNLOCK_NOSLEEP(); 1934 return (ifa); 1935 } 1936 1937 /* 1938 * Find an interface on a specific network. If many, choice 1939 * is most specific found. 1940 */ 1941 struct ifaddr * 1942 ifa_ifwithnet(const struct sockaddr *addr, int ignore_ptp, int fibnum) 1943 { 1944 struct ifnet *ifp; 1945 struct ifaddr *ifa; 1946 struct ifaddr *ifa_maybe = NULL; 1947 u_int af = addr->sa_family; 1948 const char *addr_data = addr->sa_data, *cplim; 1949 1950 /* 1951 * AF_LINK addresses can be looked up directly by their index number, 1952 * so do that if we can. 1953 */ 1954 if (af == AF_LINK) { 1955 const struct sockaddr_dl *sdl = (const struct sockaddr_dl *)addr; 1956 if (sdl->sdl_index && sdl->sdl_index <= V_if_index) 1957 return (ifaddr_byindex(sdl->sdl_index)); 1958 } 1959 1960 /* 1961 * Scan though each interface, looking for ones that have addresses 1962 * in this address family and the requested fib. Maintain a reference 1963 * on ifa_maybe once we find one, as we release the IF_ADDR_RLOCK() that 1964 * kept it stable when we move onto the next interface. 1965 */ 1966 IFNET_RLOCK_NOSLEEP(); 1967 TAILQ_FOREACH(ifp, &V_ifnet, if_link) { 1968 if ((fibnum != RT_ALL_FIBS) && (ifp->if_fib != fibnum)) 1969 continue; 1970 IF_ADDR_RLOCK(ifp); 1971 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1972 const char *cp, *cp2, *cp3; 1973 1974 if (ifa->ifa_addr->sa_family != af) 1975 next: continue; 1976 if (af == AF_INET && 1977 ifp->if_flags & IFF_POINTOPOINT && !ignore_ptp) { 1978 /* 1979 * This is a bit broken as it doesn't 1980 * take into account that the remote end may 1981 * be a single node in the network we are 1982 * looking for. 1983 * The trouble is that we don't know the 1984 * netmask for the remote end. 1985 */ 1986 if (ifa->ifa_dstaddr != NULL && 1987 sa_equal(addr, ifa->ifa_dstaddr)) { 1988 ifa_ref(ifa); 1989 IF_ADDR_RUNLOCK(ifp); 1990 goto done; 1991 } 1992 } else { 1993 /* 1994 * Scan all the bits in the ifa's address. 1995 * If a bit dissagrees with what we are 1996 * looking for, mask it with the netmask 1997 * to see if it really matters. 1998 * (A byte at a time) 1999 */ 2000 if (ifa->ifa_netmask == 0) 2001 continue; 2002 cp = addr_data; 2003 cp2 = ifa->ifa_addr->sa_data; 2004 cp3 = ifa->ifa_netmask->sa_data; 2005 cplim = ifa->ifa_netmask->sa_len 2006 + (char *)ifa->ifa_netmask; 2007 while (cp3 < cplim) 2008 if ((*cp++ ^ *cp2++) & *cp3++) 2009 goto next; /* next address! */ 2010 /* 2011 * If the netmask of what we just found 2012 * is more specific than what we had before 2013 * (if we had one), or if the virtual status 2014 * of new prefix is better than of the old one, 2015 * then remember the new one before continuing 2016 * to search for an even better one. 2017 */ 2018 if (ifa_maybe == NULL || 2019 ifa_preferred(ifa_maybe, ifa) || 2020 rn_refines((caddr_t)ifa->ifa_netmask, 2021 (caddr_t)ifa_maybe->ifa_netmask)) { 2022 if (ifa_maybe != NULL) 2023 ifa_free(ifa_maybe); 2024 ifa_maybe = ifa; 2025 ifa_ref(ifa_maybe); 2026 } 2027 } 2028 } 2029 IF_ADDR_RUNLOCK(ifp); 2030 } 2031 ifa = ifa_maybe; 2032 ifa_maybe = NULL; 2033 done: 2034 IFNET_RUNLOCK_NOSLEEP(); 2035 if (ifa_maybe != NULL) 2036 ifa_free(ifa_maybe); 2037 return (ifa); 2038 } 2039 2040 /* 2041 * Find an interface address specific to an interface best matching 2042 * a given address. 2043 */ 2044 struct ifaddr * 2045 ifaof_ifpforaddr(const struct sockaddr *addr, struct ifnet *ifp) 2046 { 2047 struct ifaddr *ifa; 2048 const char *cp, *cp2, *cp3; 2049 char *cplim; 2050 struct ifaddr *ifa_maybe = NULL; 2051 u_int af = addr->sa_family; 2052 2053 if (af >= AF_MAX) 2054 return (NULL); 2055 IF_ADDR_RLOCK(ifp); 2056 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 2057 if (ifa->ifa_addr->sa_family != af) 2058 continue; 2059 if (ifa_maybe == NULL) 2060 ifa_maybe = ifa; 2061 if (ifa->ifa_netmask == 0) { 2062 if (sa_equal(addr, ifa->ifa_addr) || 2063 (ifa->ifa_dstaddr && 2064 sa_equal(addr, ifa->ifa_dstaddr))) 2065 goto done; 2066 continue; 2067 } 2068 if (ifp->if_flags & IFF_POINTOPOINT) { 2069 if (sa_equal(addr, ifa->ifa_dstaddr)) 2070 goto done; 2071 } else { 2072 cp = addr->sa_data; 2073 cp2 = ifa->ifa_addr->sa_data; 2074 cp3 = ifa->ifa_netmask->sa_data; 2075 cplim = ifa->ifa_netmask->sa_len + (char *)ifa->ifa_netmask; 2076 for (; cp3 < cplim; cp3++) 2077 if ((*cp++ ^ *cp2++) & *cp3) 2078 break; 2079 if (cp3 == cplim) 2080 goto done; 2081 } 2082 } 2083 ifa = ifa_maybe; 2084 done: 2085 if (ifa != NULL) 2086 ifa_ref(ifa); 2087 IF_ADDR_RUNLOCK(ifp); 2088 return (ifa); 2089 } 2090 2091 /* 2092 * See whether new ifa is better than current one: 2093 * 1) A non-virtual one is preferred over virtual. 2094 * 2) A virtual in master state preferred over any other state. 2095 * 2096 * Used in several address selecting functions. 2097 */ 2098 int 2099 ifa_preferred(struct ifaddr *cur, struct ifaddr *next) 2100 { 2101 2102 return (cur->ifa_carp && (!next->ifa_carp || 2103 ((*carp_master_p)(next) && !(*carp_master_p)(cur)))); 2104 } 2105 2106 #include <net/if_llatbl.h> 2107 2108 /* 2109 * Default action when installing a route with a Link Level gateway. 2110 * Lookup an appropriate real ifa to point to. 2111 * This should be moved to /sys/net/link.c eventually. 2112 */ 2113 static void 2114 link_rtrequest(int cmd, struct rtentry *rt, struct rt_addrinfo *info) 2115 { 2116 struct ifaddr *ifa, *oifa; 2117 struct sockaddr *dst; 2118 struct ifnet *ifp; 2119 2120 if (cmd != RTM_ADD || ((ifa = rt->rt_ifa) == NULL) || 2121 ((ifp = ifa->ifa_ifp) == NULL) || ((dst = rt_key(rt)) == NULL)) 2122 return; 2123 ifa = ifaof_ifpforaddr(dst, ifp); 2124 if (ifa) { 2125 oifa = rt->rt_ifa; 2126 rt->rt_ifa = ifa; 2127 ifa_free(oifa); 2128 if (ifa->ifa_rtrequest && ifa->ifa_rtrequest != link_rtrequest) 2129 ifa->ifa_rtrequest(cmd, rt, info); 2130 } 2131 } 2132 2133 struct sockaddr_dl * 2134 link_alloc_sdl(size_t size, int flags) 2135 { 2136 2137 return (malloc(size, M_TEMP, flags)); 2138 } 2139 2140 void 2141 link_free_sdl(struct sockaddr *sa) 2142 { 2143 free(sa, M_TEMP); 2144 } 2145 2146 /* 2147 * Fills in given sdl with interface basic info. 2148 * Returns pointer to filled sdl. 2149 */ 2150 struct sockaddr_dl * 2151 link_init_sdl(struct ifnet *ifp, struct sockaddr *paddr, u_char iftype) 2152 { 2153 struct sockaddr_dl *sdl; 2154 2155 sdl = (struct sockaddr_dl *)paddr; 2156 memset(sdl, 0, sizeof(struct sockaddr_dl)); 2157 sdl->sdl_len = sizeof(struct sockaddr_dl); 2158 sdl->sdl_family = AF_LINK; 2159 sdl->sdl_index = ifp->if_index; 2160 sdl->sdl_type = iftype; 2161 2162 return (sdl); 2163 } 2164 2165 /* 2166 * Mark an interface down and notify protocols of 2167 * the transition. 2168 */ 2169 static void 2170 if_unroute(struct ifnet *ifp, int flag, int fam) 2171 { 2172 struct ifaddr *ifa; 2173 2174 KASSERT(flag == IFF_UP, ("if_unroute: flag != IFF_UP")); 2175 2176 ifp->if_flags &= ~flag; 2177 getmicrotime(&ifp->if_lastchange); 2178 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) 2179 if (fam == PF_UNSPEC || (fam == ifa->ifa_addr->sa_family)) 2180 pfctlinput(PRC_IFDOWN, ifa->ifa_addr); 2181 ifp->if_qflush(ifp); 2182 2183 if (ifp->if_carp) 2184 (*carp_linkstate_p)(ifp); 2185 rt_ifmsg(ifp); 2186 } 2187 2188 /* 2189 * Mark an interface up and notify protocols of 2190 * the transition. 2191 */ 2192 static void 2193 if_route(struct ifnet *ifp, int flag, int fam) 2194 { 2195 struct ifaddr *ifa; 2196 2197 KASSERT(flag == IFF_UP, ("if_route: flag != IFF_UP")); 2198 2199 ifp->if_flags |= flag; 2200 getmicrotime(&ifp->if_lastchange); 2201 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) 2202 if (fam == PF_UNSPEC || (fam == ifa->ifa_addr->sa_family)) 2203 pfctlinput(PRC_IFUP, ifa->ifa_addr); 2204 if (ifp->if_carp) 2205 (*carp_linkstate_p)(ifp); 2206 rt_ifmsg(ifp); 2207 #ifdef INET6 2208 in6_if_up(ifp); 2209 #endif 2210 } 2211 2212 void (*vlan_link_state_p)(struct ifnet *); /* XXX: private from if_vlan */ 2213 void (*vlan_trunk_cap_p)(struct ifnet *); /* XXX: private from if_vlan */ 2214 struct ifnet *(*vlan_trunkdev_p)(struct ifnet *); 2215 struct ifnet *(*vlan_devat_p)(struct ifnet *, uint16_t); 2216 int (*vlan_tag_p)(struct ifnet *, uint16_t *); 2217 int (*vlan_setcookie_p)(struct ifnet *, void *); 2218 void *(*vlan_cookie_p)(struct ifnet *); 2219 2220 /* 2221 * Handle a change in the interface link state. To avoid LORs 2222 * between driver lock and upper layer locks, as well as possible 2223 * recursions, we post event to taskqueue, and all job 2224 * is done in static do_link_state_change(). 2225 */ 2226 void 2227 if_link_state_change(struct ifnet *ifp, int link_state) 2228 { 2229 /* Return if state hasn't changed. */ 2230 if (ifp->if_link_state == link_state) 2231 return; 2232 2233 ifp->if_link_state = link_state; 2234 2235 taskqueue_enqueue(taskqueue_swi, &ifp->if_linktask); 2236 } 2237 2238 static void 2239 do_link_state_change(void *arg, int pending) 2240 { 2241 struct ifnet *ifp = (struct ifnet *)arg; 2242 int link_state = ifp->if_link_state; 2243 CURVNET_SET(ifp->if_vnet); 2244 2245 /* Notify that the link state has changed. */ 2246 rt_ifmsg(ifp); 2247 if (ifp->if_vlantrunk != NULL) 2248 (*vlan_link_state_p)(ifp); 2249 2250 if ((ifp->if_type == IFT_ETHER || ifp->if_type == IFT_L2VLAN) && 2251 ifp->if_l2com != NULL) 2252 (*ng_ether_link_state_p)(ifp, link_state); 2253 if (ifp->if_carp) 2254 (*carp_linkstate_p)(ifp); 2255 if (ifp->if_bridge) 2256 (*bridge_linkstate_p)(ifp); 2257 if (ifp->if_lagg) 2258 (*lagg_linkstate_p)(ifp, link_state); 2259 2260 if (IS_DEFAULT_VNET(curvnet)) 2261 devctl_notify("IFNET", ifp->if_xname, 2262 (link_state == LINK_STATE_UP) ? "LINK_UP" : "LINK_DOWN", 2263 NULL); 2264 if (pending > 1) 2265 if_printf(ifp, "%d link states coalesced\n", pending); 2266 if (log_link_state_change) 2267 log(LOG_NOTICE, "%s: link state changed to %s\n", ifp->if_xname, 2268 (link_state == LINK_STATE_UP) ? "UP" : "DOWN" ); 2269 EVENTHANDLER_INVOKE(ifnet_link_event, ifp, link_state); 2270 CURVNET_RESTORE(); 2271 } 2272 2273 /* 2274 * Mark an interface down and notify protocols of 2275 * the transition. 2276 */ 2277 void 2278 if_down(struct ifnet *ifp) 2279 { 2280 2281 EVENTHANDLER_INVOKE(ifnet_event, ifp, IFNET_EVENT_DOWN); 2282 if_unroute(ifp, IFF_UP, AF_UNSPEC); 2283 } 2284 2285 /* 2286 * Mark an interface up and notify protocols of 2287 * the transition. 2288 */ 2289 void 2290 if_up(struct ifnet *ifp) 2291 { 2292 2293 if_route(ifp, IFF_UP, AF_UNSPEC); 2294 EVENTHANDLER_INVOKE(ifnet_event, ifp, IFNET_EVENT_UP); 2295 } 2296 2297 /* 2298 * Flush an interface queue. 2299 */ 2300 void 2301 if_qflush(struct ifnet *ifp) 2302 { 2303 struct mbuf *m, *n; 2304 struct ifaltq *ifq; 2305 2306 ifq = &ifp->if_snd; 2307 IFQ_LOCK(ifq); 2308 #ifdef ALTQ 2309 if (ALTQ_IS_ENABLED(ifq)) 2310 ALTQ_PURGE(ifq); 2311 #endif 2312 n = ifq->ifq_head; 2313 while ((m = n) != NULL) { 2314 n = m->m_nextpkt; 2315 m_freem(m); 2316 } 2317 ifq->ifq_head = 0; 2318 ifq->ifq_tail = 0; 2319 ifq->ifq_len = 0; 2320 IFQ_UNLOCK(ifq); 2321 } 2322 2323 /* 2324 * Map interface name to interface structure pointer, with or without 2325 * returning a reference. 2326 */ 2327 struct ifnet * 2328 ifunit_ref(const char *name) 2329 { 2330 struct ifnet *ifp; 2331 2332 IFNET_RLOCK_NOSLEEP(); 2333 TAILQ_FOREACH(ifp, &V_ifnet, if_link) { 2334 if (strncmp(name, ifp->if_xname, IFNAMSIZ) == 0 && 2335 !(ifp->if_flags & IFF_DYING)) 2336 break; 2337 } 2338 if (ifp != NULL) 2339 if_ref(ifp); 2340 IFNET_RUNLOCK_NOSLEEP(); 2341 return (ifp); 2342 } 2343 2344 struct ifnet * 2345 ifunit(const char *name) 2346 { 2347 struct ifnet *ifp; 2348 2349 IFNET_RLOCK_NOSLEEP(); 2350 TAILQ_FOREACH(ifp, &V_ifnet, if_link) { 2351 if (strncmp(name, ifp->if_xname, IFNAMSIZ) == 0) 2352 break; 2353 } 2354 IFNET_RUNLOCK_NOSLEEP(); 2355 return (ifp); 2356 } 2357 2358 static void * 2359 ifr_buffer_get_buffer(struct thread *td, void *data) 2360 { 2361 union ifreq_union *ifrup; 2362 2363 ifrup = data; 2364 #ifdef COMPAT_FREEBSD32 2365 if (SV_PROC_FLAG(td->td_proc, SV_ILP32)) 2366 return ((void *)(uintptr_t) 2367 ifrup->ifr32.ifr_ifru.ifru_buffer.buffer); 2368 #endif 2369 return (ifrup->ifr.ifr_ifru.ifru_buffer.buffer); 2370 } 2371 2372 static void 2373 ifr_buffer_set_buffer_null(struct thread *td, void *data) 2374 { 2375 union ifreq_union *ifrup; 2376 2377 ifrup = data; 2378 #ifdef COMPAT_FREEBSD32 2379 if (SV_PROC_FLAG(td->td_proc, SV_ILP32)) 2380 ifrup->ifr32.ifr_ifru.ifru_buffer.buffer = 0; 2381 else 2382 #endif 2383 ifrup->ifr.ifr_ifru.ifru_buffer.buffer = NULL; 2384 } 2385 2386 static size_t 2387 ifr_buffer_get_length(struct thread *td, void *data) 2388 { 2389 union ifreq_union *ifrup; 2390 2391 ifrup = data; 2392 #ifdef COMPAT_FREEBSD32 2393 if (SV_PROC_FLAG(td->td_proc, SV_ILP32)) 2394 return (ifrup->ifr32.ifr_ifru.ifru_buffer.length); 2395 #endif 2396 return (ifrup->ifr.ifr_ifru.ifru_buffer.length); 2397 } 2398 2399 static void 2400 ifr_buffer_set_length(struct thread *td, void *data, size_t len) 2401 { 2402 union ifreq_union *ifrup; 2403 2404 ifrup = data; 2405 #ifdef COMPAT_FREEBSD32 2406 if (SV_PROC_FLAG(td->td_proc, SV_ILP32)) 2407 ifrup->ifr32.ifr_ifru.ifru_buffer.length = len; 2408 else 2409 #endif 2410 ifrup->ifr.ifr_ifru.ifru_buffer.length = len; 2411 } 2412 2413 void * 2414 ifr_data_get_ptr(void *ifrp) 2415 { 2416 union ifreq_union *ifrup; 2417 2418 ifrup = ifrp; 2419 #ifdef COMPAT_FREEBSD32 2420 if (SV_CURPROC_FLAG(SV_ILP32)) 2421 return ((void *)(uintptr_t) 2422 ifrup->ifr32.ifr_ifru.ifru_data); 2423 #endif 2424 return (ifrup->ifr.ifr_ifru.ifru_data); 2425 } 2426 2427 /* 2428 * Hardware specific interface ioctls. 2429 */ 2430 static int 2431 ifhwioctl(u_long cmd, struct ifnet *ifp, caddr_t data, struct thread *td) 2432 { 2433 struct ifreq *ifr; 2434 int error = 0, do_ifup = 0; 2435 int new_flags, temp_flags; 2436 size_t namelen, onamelen; 2437 size_t descrlen; 2438 char *descrbuf, *odescrbuf; 2439 char new_name[IFNAMSIZ]; 2440 struct ifaddr *ifa; 2441 struct sockaddr_dl *sdl; 2442 2443 ifr = (struct ifreq *)data; 2444 switch (cmd) { 2445 case SIOCGIFINDEX: 2446 ifr->ifr_index = ifp->if_index; 2447 break; 2448 2449 case SIOCGIFFLAGS: 2450 temp_flags = ifp->if_flags | ifp->if_drv_flags; 2451 ifr->ifr_flags = temp_flags & 0xffff; 2452 ifr->ifr_flagshigh = temp_flags >> 16; 2453 break; 2454 2455 case SIOCGIFCAP: 2456 ifr->ifr_reqcap = ifp->if_capabilities; 2457 ifr->ifr_curcap = ifp->if_capenable; 2458 break; 2459 2460 #ifdef MAC 2461 case SIOCGIFMAC: 2462 error = mac_ifnet_ioctl_get(td->td_ucred, ifr, ifp); 2463 break; 2464 #endif 2465 2466 case SIOCGIFMETRIC: 2467 ifr->ifr_metric = ifp->if_metric; 2468 break; 2469 2470 case SIOCGIFMTU: 2471 ifr->ifr_mtu = ifp->if_mtu; 2472 break; 2473 2474 case SIOCGIFPHYS: 2475 /* XXXGL: did this ever worked? */ 2476 ifr->ifr_phys = 0; 2477 break; 2478 2479 case SIOCGIFDESCR: 2480 error = 0; 2481 sx_slock(&ifdescr_sx); 2482 if (ifp->if_description == NULL) 2483 error = ENOMSG; 2484 else { 2485 /* space for terminating nul */ 2486 descrlen = strlen(ifp->if_description) + 1; 2487 if (ifr_buffer_get_length(td, ifr) < descrlen) 2488 ifr_buffer_set_buffer_null(td, ifr); 2489 else 2490 error = copyout(ifp->if_description, 2491 ifr_buffer_get_buffer(td, ifr), descrlen); 2492 ifr_buffer_set_length(td, ifr, descrlen); 2493 } 2494 sx_sunlock(&ifdescr_sx); 2495 break; 2496 2497 case SIOCSIFDESCR: 2498 error = priv_check(td, PRIV_NET_SETIFDESCR); 2499 if (error) 2500 return (error); 2501 2502 /* 2503 * Copy only (length-1) bytes to make sure that 2504 * if_description is always nul terminated. The 2505 * length parameter is supposed to count the 2506 * terminating nul in. 2507 */ 2508 if (ifr_buffer_get_length(td, ifr) > ifdescr_maxlen) 2509 return (ENAMETOOLONG); 2510 else if (ifr_buffer_get_length(td, ifr) == 0) 2511 descrbuf = NULL; 2512 else { 2513 descrbuf = malloc(ifr_buffer_get_length(td, ifr), 2514 M_IFDESCR, M_WAITOK | M_ZERO); 2515 error = copyin(ifr_buffer_get_buffer(td, ifr), descrbuf, 2516 ifr_buffer_get_length(td, ifr) - 1); 2517 if (error) { 2518 free(descrbuf, M_IFDESCR); 2519 break; 2520 } 2521 } 2522 2523 sx_xlock(&ifdescr_sx); 2524 odescrbuf = ifp->if_description; 2525 ifp->if_description = descrbuf; 2526 sx_xunlock(&ifdescr_sx); 2527 2528 getmicrotime(&ifp->if_lastchange); 2529 free(odescrbuf, M_IFDESCR); 2530 break; 2531 2532 case SIOCGIFFIB: 2533 ifr->ifr_fib = ifp->if_fib; 2534 break; 2535 2536 case SIOCSIFFIB: 2537 error = priv_check(td, PRIV_NET_SETIFFIB); 2538 if (error) 2539 return (error); 2540 if (ifr->ifr_fib >= rt_numfibs) 2541 return (EINVAL); 2542 2543 ifp->if_fib = ifr->ifr_fib; 2544 break; 2545 2546 case SIOCSIFFLAGS: 2547 error = priv_check(td, PRIV_NET_SETIFFLAGS); 2548 if (error) 2549 return (error); 2550 /* 2551 * Currently, no driver owned flags pass the IFF_CANTCHANGE 2552 * check, so we don't need special handling here yet. 2553 */ 2554 new_flags = (ifr->ifr_flags & 0xffff) | 2555 (ifr->ifr_flagshigh << 16); 2556 if (ifp->if_flags & IFF_UP && 2557 (new_flags & IFF_UP) == 0) { 2558 if_down(ifp); 2559 } else if (new_flags & IFF_UP && 2560 (ifp->if_flags & IFF_UP) == 0) { 2561 do_ifup = 1; 2562 } 2563 /* See if permanently promiscuous mode bit is about to flip */ 2564 if ((ifp->if_flags ^ new_flags) & IFF_PPROMISC) { 2565 if (new_flags & IFF_PPROMISC) 2566 ifp->if_flags |= IFF_PROMISC; 2567 else if (ifp->if_pcount == 0) 2568 ifp->if_flags &= ~IFF_PROMISC; 2569 if (log_promisc_mode_change) 2570 log(LOG_INFO, "%s: permanently promiscuous mode %s\n", 2571 ifp->if_xname, 2572 ((new_flags & IFF_PPROMISC) ? 2573 "enabled" : "disabled")); 2574 } 2575 ifp->if_flags = (ifp->if_flags & IFF_CANTCHANGE) | 2576 (new_flags &~ IFF_CANTCHANGE); 2577 if (ifp->if_ioctl) { 2578 (void) (*ifp->if_ioctl)(ifp, cmd, data); 2579 } 2580 if (do_ifup) 2581 if_up(ifp); 2582 getmicrotime(&ifp->if_lastchange); 2583 break; 2584 2585 case SIOCSIFCAP: 2586 error = priv_check(td, PRIV_NET_SETIFCAP); 2587 if (error) 2588 return (error); 2589 if (ifp->if_ioctl == NULL) 2590 return (EOPNOTSUPP); 2591 if (ifr->ifr_reqcap & ~ifp->if_capabilities) 2592 return (EINVAL); 2593 error = (*ifp->if_ioctl)(ifp, cmd, data); 2594 if (error == 0) 2595 getmicrotime(&ifp->if_lastchange); 2596 break; 2597 2598 #ifdef MAC 2599 case SIOCSIFMAC: 2600 error = mac_ifnet_ioctl_set(td->td_ucred, ifr, ifp); 2601 break; 2602 #endif 2603 2604 case SIOCSIFNAME: 2605 error = priv_check(td, PRIV_NET_SETIFNAME); 2606 if (error) 2607 return (error); 2608 error = copyinstr(ifr_data_get_ptr(ifr), new_name, IFNAMSIZ, 2609 NULL); 2610 if (error != 0) 2611 return (error); 2612 if (new_name[0] == '\0') 2613 return (EINVAL); 2614 if (new_name[IFNAMSIZ-1] != '\0') { 2615 new_name[IFNAMSIZ-1] = '\0'; 2616 if (strlen(new_name) == IFNAMSIZ-1) 2617 return (EINVAL); 2618 } 2619 if (ifunit(new_name) != NULL) 2620 return (EEXIST); 2621 2622 /* 2623 * XXX: Locking. Nothing else seems to lock if_flags, 2624 * and there are numerous other races with the 2625 * ifunit() checks not being atomic with namespace 2626 * changes (renames, vmoves, if_attach, etc). 2627 */ 2628 ifp->if_flags |= IFF_RENAMING; 2629 2630 /* Announce the departure of the interface. */ 2631 rt_ifannouncemsg(ifp, IFAN_DEPARTURE); 2632 EVENTHANDLER_INVOKE(ifnet_departure_event, ifp); 2633 2634 log(LOG_INFO, "%s: changing name to '%s'\n", 2635 ifp->if_xname, new_name); 2636 2637 IF_ADDR_WLOCK(ifp); 2638 strlcpy(ifp->if_xname, new_name, sizeof(ifp->if_xname)); 2639 ifa = ifp->if_addr; 2640 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 2641 namelen = strlen(new_name); 2642 onamelen = sdl->sdl_nlen; 2643 /* 2644 * Move the address if needed. This is safe because we 2645 * allocate space for a name of length IFNAMSIZ when we 2646 * create this in if_attach(). 2647 */ 2648 if (namelen != onamelen) { 2649 bcopy(sdl->sdl_data + onamelen, 2650 sdl->sdl_data + namelen, sdl->sdl_alen); 2651 } 2652 bcopy(new_name, sdl->sdl_data, namelen); 2653 sdl->sdl_nlen = namelen; 2654 sdl = (struct sockaddr_dl *)ifa->ifa_netmask; 2655 bzero(sdl->sdl_data, onamelen); 2656 while (namelen != 0) 2657 sdl->sdl_data[--namelen] = 0xff; 2658 IF_ADDR_WUNLOCK(ifp); 2659 2660 EVENTHANDLER_INVOKE(ifnet_arrival_event, ifp); 2661 /* Announce the return of the interface. */ 2662 rt_ifannouncemsg(ifp, IFAN_ARRIVAL); 2663 2664 ifp->if_flags &= ~IFF_RENAMING; 2665 break; 2666 2667 #ifdef VIMAGE 2668 case SIOCSIFVNET: 2669 error = priv_check(td, PRIV_NET_SETIFVNET); 2670 if (error) 2671 return (error); 2672 error = if_vmove_loan(td, ifp, ifr->ifr_name, ifr->ifr_jid); 2673 break; 2674 #endif 2675 2676 case SIOCSIFMETRIC: 2677 error = priv_check(td, PRIV_NET_SETIFMETRIC); 2678 if (error) 2679 return (error); 2680 ifp->if_metric = ifr->ifr_metric; 2681 getmicrotime(&ifp->if_lastchange); 2682 break; 2683 2684 case SIOCSIFPHYS: 2685 error = priv_check(td, PRIV_NET_SETIFPHYS); 2686 if (error) 2687 return (error); 2688 if (ifp->if_ioctl == NULL) 2689 return (EOPNOTSUPP); 2690 error = (*ifp->if_ioctl)(ifp, cmd, data); 2691 if (error == 0) 2692 getmicrotime(&ifp->if_lastchange); 2693 break; 2694 2695 case SIOCSIFMTU: 2696 { 2697 u_long oldmtu = ifp->if_mtu; 2698 2699 error = priv_check(td, PRIV_NET_SETIFMTU); 2700 if (error) 2701 return (error); 2702 if (ifr->ifr_mtu < IF_MINMTU || ifr->ifr_mtu > IF_MAXMTU) 2703 return (EINVAL); 2704 if (ifp->if_ioctl == NULL) 2705 return (EOPNOTSUPP); 2706 error = (*ifp->if_ioctl)(ifp, cmd, data); 2707 if (error == 0) { 2708 getmicrotime(&ifp->if_lastchange); 2709 rt_ifmsg(ifp); 2710 } 2711 /* 2712 * If the link MTU changed, do network layer specific procedure. 2713 */ 2714 if (ifp->if_mtu != oldmtu) { 2715 #ifdef INET6 2716 nd6_setmtu(ifp); 2717 #endif 2718 rt_updatemtu(ifp); 2719 } 2720 break; 2721 } 2722 2723 case SIOCADDMULTI: 2724 case SIOCDELMULTI: 2725 if (cmd == SIOCADDMULTI) 2726 error = priv_check(td, PRIV_NET_ADDMULTI); 2727 else 2728 error = priv_check(td, PRIV_NET_DELMULTI); 2729 if (error) 2730 return (error); 2731 2732 /* Don't allow group membership on non-multicast interfaces. */ 2733 if ((ifp->if_flags & IFF_MULTICAST) == 0) 2734 return (EOPNOTSUPP); 2735 2736 /* Don't let users screw up protocols' entries. */ 2737 if (ifr->ifr_addr.sa_family != AF_LINK) 2738 return (EINVAL); 2739 2740 if (cmd == SIOCADDMULTI) { 2741 struct ifmultiaddr *ifma; 2742 2743 /* 2744 * Userland is only permitted to join groups once 2745 * via the if_addmulti() KPI, because it cannot hold 2746 * struct ifmultiaddr * between calls. It may also 2747 * lose a race while we check if the membership 2748 * already exists. 2749 */ 2750 IF_ADDR_RLOCK(ifp); 2751 ifma = if_findmulti(ifp, &ifr->ifr_addr); 2752 IF_ADDR_RUNLOCK(ifp); 2753 if (ifma != NULL) 2754 error = EADDRINUSE; 2755 else 2756 error = if_addmulti(ifp, &ifr->ifr_addr, &ifma); 2757 } else { 2758 error = if_delmulti(ifp, &ifr->ifr_addr); 2759 } 2760 if (error == 0) 2761 getmicrotime(&ifp->if_lastchange); 2762 break; 2763 2764 case SIOCSIFPHYADDR: 2765 case SIOCDIFPHYADDR: 2766 #ifdef INET6 2767 case SIOCSIFPHYADDR_IN6: 2768 #endif 2769 case SIOCSIFMEDIA: 2770 case SIOCSIFGENERIC: 2771 error = priv_check(td, PRIV_NET_HWIOCTL); 2772 if (error) 2773 return (error); 2774 if (ifp->if_ioctl == NULL) 2775 return (EOPNOTSUPP); 2776 error = (*ifp->if_ioctl)(ifp, cmd, data); 2777 if (error == 0) 2778 getmicrotime(&ifp->if_lastchange); 2779 break; 2780 2781 case SIOCGIFSTATUS: 2782 case SIOCGIFPSRCADDR: 2783 case SIOCGIFPDSTADDR: 2784 case SIOCGIFMEDIA: 2785 case SIOCGIFXMEDIA: 2786 case SIOCGIFGENERIC: 2787 case SIOCGIFRSSKEY: 2788 case SIOCGIFRSSHASH: 2789 if (ifp->if_ioctl == NULL) 2790 return (EOPNOTSUPP); 2791 error = (*ifp->if_ioctl)(ifp, cmd, data); 2792 break; 2793 2794 case SIOCSIFLLADDR: 2795 error = priv_check(td, PRIV_NET_SETLLADDR); 2796 if (error) 2797 return (error); 2798 error = if_setlladdr(ifp, 2799 ifr->ifr_addr.sa_data, ifr->ifr_addr.sa_len); 2800 break; 2801 2802 case SIOCGHWADDR: 2803 error = if_gethwaddr(ifp, ifr); 2804 break; 2805 2806 case SIOCAIFGROUP: 2807 { 2808 struct ifgroupreq *ifgr = (struct ifgroupreq *)ifr; 2809 2810 error = priv_check(td, PRIV_NET_ADDIFGROUP); 2811 if (error) 2812 return (error); 2813 if ((error = if_addgroup(ifp, ifgr->ifgr_group))) 2814 return (error); 2815 break; 2816 } 2817 2818 case SIOCGIFGROUP: 2819 if ((error = if_getgroup((struct ifgroupreq *)ifr, ifp))) 2820 return (error); 2821 break; 2822 2823 case SIOCDIFGROUP: 2824 { 2825 struct ifgroupreq *ifgr = (struct ifgroupreq *)ifr; 2826 2827 error = priv_check(td, PRIV_NET_DELIFGROUP); 2828 if (error) 2829 return (error); 2830 if ((error = if_delgroup(ifp, ifgr->ifgr_group))) 2831 return (error); 2832 break; 2833 } 2834 2835 default: 2836 error = ENOIOCTL; 2837 break; 2838 } 2839 return (error); 2840 } 2841 2842 #ifdef COMPAT_FREEBSD32 2843 struct ifconf32 { 2844 int32_t ifc_len; 2845 union { 2846 uint32_t ifcu_buf; 2847 uint32_t ifcu_req; 2848 } ifc_ifcu; 2849 }; 2850 #define SIOCGIFCONF32 _IOWR('i', 36, struct ifconf32) 2851 #endif 2852 2853 /* 2854 * Interface ioctls. 2855 */ 2856 int 2857 ifioctl(struct socket *so, u_long cmd, caddr_t data, struct thread *td) 2858 { 2859 struct ifnet *ifp; 2860 struct ifreq *ifr; 2861 int error; 2862 int oif_flags; 2863 #ifdef VIMAGE 2864 int shutdown; 2865 #endif 2866 2867 CURVNET_SET(so->so_vnet); 2868 #ifdef VIMAGE 2869 /* Make sure the VNET is stable. */ 2870 shutdown = (so->so_vnet->vnet_state > SI_SUB_VNET && 2871 so->so_vnet->vnet_state < SI_SUB_VNET_DONE) ? 1 : 0; 2872 if (shutdown) { 2873 CURVNET_RESTORE(); 2874 return (EBUSY); 2875 } 2876 #endif 2877 2878 2879 switch (cmd) { 2880 case SIOCGIFCONF: 2881 error = ifconf(cmd, data); 2882 CURVNET_RESTORE(); 2883 return (error); 2884 2885 #ifdef COMPAT_FREEBSD32 2886 case SIOCGIFCONF32: 2887 { 2888 struct ifconf32 *ifc32; 2889 struct ifconf ifc; 2890 2891 ifc32 = (struct ifconf32 *)data; 2892 ifc.ifc_len = ifc32->ifc_len; 2893 ifc.ifc_buf = PTRIN(ifc32->ifc_buf); 2894 2895 error = ifconf(SIOCGIFCONF, (void *)&ifc); 2896 CURVNET_RESTORE(); 2897 if (error == 0) 2898 ifc32->ifc_len = ifc.ifc_len; 2899 return (error); 2900 } 2901 #endif 2902 } 2903 ifr = (struct ifreq *)data; 2904 2905 switch (cmd) { 2906 #ifdef VIMAGE 2907 case SIOCSIFRVNET: 2908 error = priv_check(td, PRIV_NET_SETIFVNET); 2909 if (error == 0) 2910 error = if_vmove_reclaim(td, ifr->ifr_name, 2911 ifr->ifr_jid); 2912 CURVNET_RESTORE(); 2913 return (error); 2914 #endif 2915 case SIOCIFCREATE: 2916 case SIOCIFCREATE2: 2917 error = priv_check(td, PRIV_NET_IFCREATE); 2918 if (error == 0) 2919 error = if_clone_create(ifr->ifr_name, 2920 sizeof(ifr->ifr_name), cmd == SIOCIFCREATE2 ? 2921 ifr_data_get_ptr(ifr) : NULL); 2922 CURVNET_RESTORE(); 2923 return (error); 2924 case SIOCIFDESTROY: 2925 error = priv_check(td, PRIV_NET_IFDESTROY); 2926 if (error == 0) 2927 error = if_clone_destroy(ifr->ifr_name); 2928 CURVNET_RESTORE(); 2929 return (error); 2930 2931 case SIOCIFGCLONERS: 2932 error = if_clone_list((struct if_clonereq *)data); 2933 CURVNET_RESTORE(); 2934 return (error); 2935 case SIOCGIFGMEMB: 2936 error = if_getgroupmembers((struct ifgroupreq *)data); 2937 CURVNET_RESTORE(); 2938 return (error); 2939 #if defined(INET) || defined(INET6) 2940 case SIOCSVH: 2941 case SIOCGVH: 2942 if (carp_ioctl_p == NULL) 2943 error = EPROTONOSUPPORT; 2944 else 2945 error = (*carp_ioctl_p)(ifr, cmd, td); 2946 CURVNET_RESTORE(); 2947 return (error); 2948 #endif 2949 } 2950 2951 ifp = ifunit_ref(ifr->ifr_name); 2952 if (ifp == NULL) { 2953 CURVNET_RESTORE(); 2954 return (ENXIO); 2955 } 2956 2957 error = ifhwioctl(cmd, ifp, data, td); 2958 if (error != ENOIOCTL) { 2959 if_rele(ifp); 2960 CURVNET_RESTORE(); 2961 return (error); 2962 } 2963 2964 oif_flags = ifp->if_flags; 2965 if (so->so_proto == NULL) { 2966 if_rele(ifp); 2967 CURVNET_RESTORE(); 2968 return (EOPNOTSUPP); 2969 } 2970 2971 /* 2972 * Pass the request on to the socket control method, and if the 2973 * latter returns EOPNOTSUPP, directly to the interface. 2974 * 2975 * Make an exception for the legacy SIOCSIF* requests. Drivers 2976 * trust SIOCSIFADDR et al to come from an already privileged 2977 * layer, and do not perform any credentials checks or input 2978 * validation. 2979 */ 2980 error = ((*so->so_proto->pr_usrreqs->pru_control)(so, cmd, data, 2981 ifp, td)); 2982 if (error == EOPNOTSUPP && ifp != NULL && ifp->if_ioctl != NULL && 2983 cmd != SIOCSIFADDR && cmd != SIOCSIFBRDADDR && 2984 cmd != SIOCSIFDSTADDR && cmd != SIOCSIFNETMASK) 2985 error = (*ifp->if_ioctl)(ifp, cmd, data); 2986 2987 if ((oif_flags ^ ifp->if_flags) & IFF_UP) { 2988 #ifdef INET6 2989 if (ifp->if_flags & IFF_UP) 2990 in6_if_up(ifp); 2991 #endif 2992 } 2993 if_rele(ifp); 2994 CURVNET_RESTORE(); 2995 return (error); 2996 } 2997 2998 /* 2999 * The code common to handling reference counted flags, 3000 * e.g., in ifpromisc() and if_allmulti(). 3001 * The "pflag" argument can specify a permanent mode flag to check, 3002 * such as IFF_PPROMISC for promiscuous mode; should be 0 if none. 3003 * 3004 * Only to be used on stack-owned flags, not driver-owned flags. 3005 */ 3006 static int 3007 if_setflag(struct ifnet *ifp, int flag, int pflag, int *refcount, int onswitch) 3008 { 3009 struct ifreq ifr; 3010 int error; 3011 int oldflags, oldcount; 3012 3013 /* Sanity checks to catch programming errors */ 3014 KASSERT((flag & (IFF_DRV_OACTIVE|IFF_DRV_RUNNING)) == 0, 3015 ("%s: setting driver-owned flag %d", __func__, flag)); 3016 3017 if (onswitch) 3018 KASSERT(*refcount >= 0, 3019 ("%s: increment negative refcount %d for flag %d", 3020 __func__, *refcount, flag)); 3021 else 3022 KASSERT(*refcount > 0, 3023 ("%s: decrement non-positive refcount %d for flag %d", 3024 __func__, *refcount, flag)); 3025 3026 /* In case this mode is permanent, just touch refcount */ 3027 if (ifp->if_flags & pflag) { 3028 *refcount += onswitch ? 1 : -1; 3029 return (0); 3030 } 3031 3032 /* Save ifnet parameters for if_ioctl() may fail */ 3033 oldcount = *refcount; 3034 oldflags = ifp->if_flags; 3035 3036 /* 3037 * See if we aren't the only and touching refcount is enough. 3038 * Actually toggle interface flag if we are the first or last. 3039 */ 3040 if (onswitch) { 3041 if ((*refcount)++) 3042 return (0); 3043 ifp->if_flags |= flag; 3044 } else { 3045 if (--(*refcount)) 3046 return (0); 3047 ifp->if_flags &= ~flag; 3048 } 3049 3050 /* Call down the driver since we've changed interface flags */ 3051 if (ifp->if_ioctl == NULL) { 3052 error = EOPNOTSUPP; 3053 goto recover; 3054 } 3055 ifr.ifr_flags = ifp->if_flags & 0xffff; 3056 ifr.ifr_flagshigh = ifp->if_flags >> 16; 3057 error = (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr); 3058 if (error) 3059 goto recover; 3060 /* Notify userland that interface flags have changed */ 3061 rt_ifmsg(ifp); 3062 return (0); 3063 3064 recover: 3065 /* Recover after driver error */ 3066 *refcount = oldcount; 3067 ifp->if_flags = oldflags; 3068 return (error); 3069 } 3070 3071 /* 3072 * Set/clear promiscuous mode on interface ifp based on the truth value 3073 * of pswitch. The calls are reference counted so that only the first 3074 * "on" request actually has an effect, as does the final "off" request. 3075 * Results are undefined if the "off" and "on" requests are not matched. 3076 */ 3077 int 3078 ifpromisc(struct ifnet *ifp, int pswitch) 3079 { 3080 int error; 3081 int oldflags = ifp->if_flags; 3082 3083 error = if_setflag(ifp, IFF_PROMISC, IFF_PPROMISC, 3084 &ifp->if_pcount, pswitch); 3085 /* If promiscuous mode status has changed, log a message */ 3086 if (error == 0 && ((ifp->if_flags ^ oldflags) & IFF_PROMISC) && 3087 log_promisc_mode_change) 3088 log(LOG_INFO, "%s: promiscuous mode %s\n", 3089 ifp->if_xname, 3090 (ifp->if_flags & IFF_PROMISC) ? "enabled" : "disabled"); 3091 return (error); 3092 } 3093 3094 /* 3095 * Return interface configuration 3096 * of system. List may be used 3097 * in later ioctl's (above) to get 3098 * other information. 3099 */ 3100 /*ARGSUSED*/ 3101 static int 3102 ifconf(u_long cmd, caddr_t data) 3103 { 3104 struct ifconf *ifc = (struct ifconf *)data; 3105 struct ifnet *ifp; 3106 struct ifaddr *ifa; 3107 struct ifreq ifr; 3108 struct sbuf *sb; 3109 int error, full = 0, valid_len, max_len; 3110 3111 /* Limit initial buffer size to MAXPHYS to avoid DoS from userspace. */ 3112 max_len = MAXPHYS - 1; 3113 3114 /* Prevent hostile input from being able to crash the system */ 3115 if (ifc->ifc_len <= 0) 3116 return (EINVAL); 3117 3118 again: 3119 if (ifc->ifc_len <= max_len) { 3120 max_len = ifc->ifc_len; 3121 full = 1; 3122 } 3123 sb = sbuf_new(NULL, NULL, max_len + 1, SBUF_FIXEDLEN); 3124 max_len = 0; 3125 valid_len = 0; 3126 3127 IFNET_RLOCK(); 3128 TAILQ_FOREACH(ifp, &V_ifnet, if_link) { 3129 int addrs; 3130 3131 /* 3132 * Zero the ifr_name buffer to make sure we don't 3133 * disclose the contents of the stack. 3134 */ 3135 memset(ifr.ifr_name, 0, sizeof(ifr.ifr_name)); 3136 3137 if (strlcpy(ifr.ifr_name, ifp->if_xname, sizeof(ifr.ifr_name)) 3138 >= sizeof(ifr.ifr_name)) { 3139 sbuf_delete(sb); 3140 IFNET_RUNLOCK(); 3141 return (ENAMETOOLONG); 3142 } 3143 3144 addrs = 0; 3145 IF_ADDR_RLOCK(ifp); 3146 TAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 3147 struct sockaddr *sa = ifa->ifa_addr; 3148 3149 if (prison_if(curthread->td_ucred, sa) != 0) 3150 continue; 3151 addrs++; 3152 if (sa->sa_len <= sizeof(*sa)) { 3153 ifr.ifr_addr = *sa; 3154 sbuf_bcat(sb, &ifr, sizeof(ifr)); 3155 max_len += sizeof(ifr); 3156 } else { 3157 sbuf_bcat(sb, &ifr, 3158 offsetof(struct ifreq, ifr_addr)); 3159 max_len += offsetof(struct ifreq, ifr_addr); 3160 sbuf_bcat(sb, sa, sa->sa_len); 3161 max_len += sa->sa_len; 3162 } 3163 3164 if (sbuf_error(sb) == 0) 3165 valid_len = sbuf_len(sb); 3166 } 3167 IF_ADDR_RUNLOCK(ifp); 3168 if (addrs == 0) { 3169 bzero((caddr_t)&ifr.ifr_addr, sizeof(ifr.ifr_addr)); 3170 sbuf_bcat(sb, &ifr, sizeof(ifr)); 3171 max_len += sizeof(ifr); 3172 3173 if (sbuf_error(sb) == 0) 3174 valid_len = sbuf_len(sb); 3175 } 3176 } 3177 IFNET_RUNLOCK(); 3178 3179 /* 3180 * If we didn't allocate enough space (uncommon), try again. If 3181 * we have already allocated as much space as we are allowed, 3182 * return what we've got. 3183 */ 3184 if (valid_len != max_len && !full) { 3185 sbuf_delete(sb); 3186 goto again; 3187 } 3188 3189 ifc->ifc_len = valid_len; 3190 sbuf_finish(sb); 3191 error = copyout(sbuf_data(sb), ifc->ifc_req, ifc->ifc_len); 3192 sbuf_delete(sb); 3193 return (error); 3194 } 3195 3196 /* 3197 * Just like ifpromisc(), but for all-multicast-reception mode. 3198 */ 3199 int 3200 if_allmulti(struct ifnet *ifp, int onswitch) 3201 { 3202 3203 return (if_setflag(ifp, IFF_ALLMULTI, 0, &ifp->if_amcount, onswitch)); 3204 } 3205 3206 struct ifmultiaddr * 3207 if_findmulti(struct ifnet *ifp, const struct sockaddr *sa) 3208 { 3209 struct ifmultiaddr *ifma; 3210 3211 IF_ADDR_LOCK_ASSERT(ifp); 3212 3213 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) { 3214 if (sa->sa_family == AF_LINK) { 3215 if (sa_dl_equal(ifma->ifma_addr, sa)) 3216 break; 3217 } else { 3218 if (sa_equal(ifma->ifma_addr, sa)) 3219 break; 3220 } 3221 } 3222 3223 return ifma; 3224 } 3225 3226 /* 3227 * Allocate a new ifmultiaddr and initialize based on passed arguments. We 3228 * make copies of passed sockaddrs. The ifmultiaddr will not be added to 3229 * the ifnet multicast address list here, so the caller must do that and 3230 * other setup work (such as notifying the device driver). The reference 3231 * count is initialized to 1. 3232 */ 3233 static struct ifmultiaddr * 3234 if_allocmulti(struct ifnet *ifp, struct sockaddr *sa, struct sockaddr *llsa, 3235 int mflags) 3236 { 3237 struct ifmultiaddr *ifma; 3238 struct sockaddr *dupsa; 3239 3240 ifma = malloc(sizeof *ifma, M_IFMADDR, mflags | 3241 M_ZERO); 3242 if (ifma == NULL) 3243 return (NULL); 3244 3245 dupsa = malloc(sa->sa_len, M_IFMADDR, mflags); 3246 if (dupsa == NULL) { 3247 free(ifma, M_IFMADDR); 3248 return (NULL); 3249 } 3250 bcopy(sa, dupsa, sa->sa_len); 3251 ifma->ifma_addr = dupsa; 3252 3253 ifma->ifma_ifp = ifp; 3254 ifma->ifma_refcount = 1; 3255 ifma->ifma_protospec = NULL; 3256 3257 if (llsa == NULL) { 3258 ifma->ifma_lladdr = NULL; 3259 return (ifma); 3260 } 3261 3262 dupsa = malloc(llsa->sa_len, M_IFMADDR, mflags); 3263 if (dupsa == NULL) { 3264 free(ifma->ifma_addr, M_IFMADDR); 3265 free(ifma, M_IFMADDR); 3266 return (NULL); 3267 } 3268 bcopy(llsa, dupsa, llsa->sa_len); 3269 ifma->ifma_lladdr = dupsa; 3270 3271 return (ifma); 3272 } 3273 3274 /* 3275 * if_freemulti: free ifmultiaddr structure and possibly attached related 3276 * addresses. The caller is responsible for implementing reference 3277 * counting, notifying the driver, handling routing messages, and releasing 3278 * any dependent link layer state. 3279 */ 3280 static void 3281 if_freemulti(struct ifmultiaddr *ifma) 3282 { 3283 3284 KASSERT(ifma->ifma_refcount == 0, ("if_freemulti: refcount %d", 3285 ifma->ifma_refcount)); 3286 3287 if (ifma->ifma_lladdr != NULL) 3288 free(ifma->ifma_lladdr, M_IFMADDR); 3289 free(ifma->ifma_addr, M_IFMADDR); 3290 free(ifma, M_IFMADDR); 3291 } 3292 3293 /* 3294 * Register an additional multicast address with a network interface. 3295 * 3296 * - If the address is already present, bump the reference count on the 3297 * address and return. 3298 * - If the address is not link-layer, look up a link layer address. 3299 * - Allocate address structures for one or both addresses, and attach to the 3300 * multicast address list on the interface. If automatically adding a link 3301 * layer address, the protocol address will own a reference to the link 3302 * layer address, to be freed when it is freed. 3303 * - Notify the network device driver of an addition to the multicast address 3304 * list. 3305 * 3306 * 'sa' points to caller-owned memory with the desired multicast address. 3307 * 3308 * 'retifma' will be used to return a pointer to the resulting multicast 3309 * address reference, if desired. 3310 */ 3311 int 3312 if_addmulti(struct ifnet *ifp, struct sockaddr *sa, 3313 struct ifmultiaddr **retifma) 3314 { 3315 struct ifmultiaddr *ifma, *ll_ifma; 3316 struct sockaddr *llsa; 3317 struct sockaddr_dl sdl; 3318 int error; 3319 3320 /* 3321 * If the address is already present, return a new reference to it; 3322 * otherwise, allocate storage and set up a new address. 3323 */ 3324 IF_ADDR_WLOCK(ifp); 3325 ifma = if_findmulti(ifp, sa); 3326 if (ifma != NULL) { 3327 ifma->ifma_refcount++; 3328 if (retifma != NULL) 3329 *retifma = ifma; 3330 IF_ADDR_WUNLOCK(ifp); 3331 return (0); 3332 } 3333 3334 /* 3335 * The address isn't already present; resolve the protocol address 3336 * into a link layer address, and then look that up, bump its 3337 * refcount or allocate an ifma for that also. 3338 * Most link layer resolving functions returns address data which 3339 * fits inside default sockaddr_dl structure. However callback 3340 * can allocate another sockaddr structure, in that case we need to 3341 * free it later. 3342 */ 3343 llsa = NULL; 3344 ll_ifma = NULL; 3345 if (ifp->if_resolvemulti != NULL) { 3346 /* Provide called function with buffer size information */ 3347 sdl.sdl_len = sizeof(sdl); 3348 llsa = (struct sockaddr *)&sdl; 3349 error = ifp->if_resolvemulti(ifp, &llsa, sa); 3350 if (error) 3351 goto unlock_out; 3352 } 3353 3354 /* 3355 * Allocate the new address. Don't hook it up yet, as we may also 3356 * need to allocate a link layer multicast address. 3357 */ 3358 ifma = if_allocmulti(ifp, sa, llsa, M_NOWAIT); 3359 if (ifma == NULL) { 3360 error = ENOMEM; 3361 goto free_llsa_out; 3362 } 3363 3364 /* 3365 * If a link layer address is found, we'll need to see if it's 3366 * already present in the address list, or allocate is as well. 3367 * When this block finishes, the link layer address will be on the 3368 * list. 3369 */ 3370 if (llsa != NULL) { 3371 ll_ifma = if_findmulti(ifp, llsa); 3372 if (ll_ifma == NULL) { 3373 ll_ifma = if_allocmulti(ifp, llsa, NULL, M_NOWAIT); 3374 if (ll_ifma == NULL) { 3375 --ifma->ifma_refcount; 3376 if_freemulti(ifma); 3377 error = ENOMEM; 3378 goto free_llsa_out; 3379 } 3380 TAILQ_INSERT_HEAD(&ifp->if_multiaddrs, ll_ifma, 3381 ifma_link); 3382 } else 3383 ll_ifma->ifma_refcount++; 3384 ifma->ifma_llifma = ll_ifma; 3385 } 3386 3387 /* 3388 * We now have a new multicast address, ifma, and possibly a new or 3389 * referenced link layer address. Add the primary address to the 3390 * ifnet address list. 3391 */ 3392 TAILQ_INSERT_HEAD(&ifp->if_multiaddrs, ifma, ifma_link); 3393 3394 if (retifma != NULL) 3395 *retifma = ifma; 3396 3397 /* 3398 * Must generate the message while holding the lock so that 'ifma' 3399 * pointer is still valid. 3400 */ 3401 rt_newmaddrmsg(RTM_NEWMADDR, ifma); 3402 IF_ADDR_WUNLOCK(ifp); 3403 3404 /* 3405 * We are certain we have added something, so call down to the 3406 * interface to let them know about it. 3407 */ 3408 if (ifp->if_ioctl != NULL) { 3409 (void) (*ifp->if_ioctl)(ifp, SIOCADDMULTI, 0); 3410 } 3411 3412 if ((llsa != NULL) && (llsa != (struct sockaddr *)&sdl)) 3413 link_free_sdl(llsa); 3414 3415 return (0); 3416 3417 free_llsa_out: 3418 if ((llsa != NULL) && (llsa != (struct sockaddr *)&sdl)) 3419 link_free_sdl(llsa); 3420 3421 unlock_out: 3422 IF_ADDR_WUNLOCK(ifp); 3423 return (error); 3424 } 3425 3426 /* 3427 * Delete a multicast group membership by network-layer group address. 3428 * 3429 * Returns ENOENT if the entry could not be found. If ifp no longer 3430 * exists, results are undefined. This entry point should only be used 3431 * from subsystems which do appropriate locking to hold ifp for the 3432 * duration of the call. 3433 * Network-layer protocol domains must use if_delmulti_ifma(). 3434 */ 3435 int 3436 if_delmulti(struct ifnet *ifp, struct sockaddr *sa) 3437 { 3438 struct ifmultiaddr *ifma; 3439 int lastref; 3440 #ifdef INVARIANTS 3441 struct ifnet *oifp; 3442 3443 IFNET_RLOCK_NOSLEEP(); 3444 TAILQ_FOREACH(oifp, &V_ifnet, if_link) 3445 if (ifp == oifp) 3446 break; 3447 if (ifp != oifp) 3448 ifp = NULL; 3449 IFNET_RUNLOCK_NOSLEEP(); 3450 3451 KASSERT(ifp != NULL, ("%s: ifnet went away", __func__)); 3452 #endif 3453 if (ifp == NULL) 3454 return (ENOENT); 3455 3456 IF_ADDR_WLOCK(ifp); 3457 lastref = 0; 3458 ifma = if_findmulti(ifp, sa); 3459 if (ifma != NULL) 3460 lastref = if_delmulti_locked(ifp, ifma, 0); 3461 IF_ADDR_WUNLOCK(ifp); 3462 3463 if (ifma == NULL) 3464 return (ENOENT); 3465 3466 if (lastref && ifp->if_ioctl != NULL) { 3467 (void)(*ifp->if_ioctl)(ifp, SIOCDELMULTI, 0); 3468 } 3469 3470 return (0); 3471 } 3472 3473 /* 3474 * Delete all multicast group membership for an interface. 3475 * Should be used to quickly flush all multicast filters. 3476 */ 3477 void 3478 if_delallmulti(struct ifnet *ifp) 3479 { 3480 struct ifmultiaddr *ifma; 3481 struct ifmultiaddr *next; 3482 3483 IF_ADDR_WLOCK(ifp); 3484 TAILQ_FOREACH_SAFE(ifma, &ifp->if_multiaddrs, ifma_link, next) 3485 if_delmulti_locked(ifp, ifma, 0); 3486 IF_ADDR_WUNLOCK(ifp); 3487 } 3488 3489 /* 3490 * Delete a multicast group membership by group membership pointer. 3491 * Network-layer protocol domains must use this routine. 3492 * 3493 * It is safe to call this routine if the ifp disappeared. 3494 */ 3495 void 3496 if_delmulti_ifma(struct ifmultiaddr *ifma) 3497 { 3498 struct ifnet *ifp; 3499 int lastref; 3500 3501 ifp = ifma->ifma_ifp; 3502 #ifdef DIAGNOSTIC 3503 if (ifp == NULL) { 3504 printf("%s: ifma_ifp seems to be detached\n", __func__); 3505 } else { 3506 struct ifnet *oifp; 3507 3508 IFNET_RLOCK_NOSLEEP(); 3509 TAILQ_FOREACH(oifp, &V_ifnet, if_link) 3510 if (ifp == oifp) 3511 break; 3512 if (ifp != oifp) { 3513 printf("%s: ifnet %p disappeared\n", __func__, ifp); 3514 ifp = NULL; 3515 } 3516 IFNET_RUNLOCK_NOSLEEP(); 3517 } 3518 #endif 3519 /* 3520 * If and only if the ifnet instance exists: Acquire the address lock. 3521 */ 3522 if (ifp != NULL) 3523 IF_ADDR_WLOCK(ifp); 3524 3525 lastref = if_delmulti_locked(ifp, ifma, 0); 3526 3527 if (ifp != NULL) { 3528 /* 3529 * If and only if the ifnet instance exists: 3530 * Release the address lock. 3531 * If the group was left: update the hardware hash filter. 3532 */ 3533 IF_ADDR_WUNLOCK(ifp); 3534 if (lastref && ifp->if_ioctl != NULL) { 3535 (void)(*ifp->if_ioctl)(ifp, SIOCDELMULTI, 0); 3536 } 3537 } 3538 } 3539 3540 /* 3541 * Perform deletion of network-layer and/or link-layer multicast address. 3542 * 3543 * Return 0 if the reference count was decremented. 3544 * Return 1 if the final reference was released, indicating that the 3545 * hardware hash filter should be reprogrammed. 3546 */ 3547 static int 3548 if_delmulti_locked(struct ifnet *ifp, struct ifmultiaddr *ifma, int detaching) 3549 { 3550 struct ifmultiaddr *ll_ifma; 3551 3552 if (ifp != NULL && ifma->ifma_ifp != NULL) { 3553 KASSERT(ifma->ifma_ifp == ifp, 3554 ("%s: inconsistent ifp %p", __func__, ifp)); 3555 IF_ADDR_WLOCK_ASSERT(ifp); 3556 } 3557 3558 ifp = ifma->ifma_ifp; 3559 3560 /* 3561 * If the ifnet is detaching, null out references to ifnet, 3562 * so that upper protocol layers will notice, and not attempt 3563 * to obtain locks for an ifnet which no longer exists. The 3564 * routing socket announcement must happen before the ifnet 3565 * instance is detached from the system. 3566 */ 3567 if (detaching) { 3568 #ifdef DIAGNOSTIC 3569 printf("%s: detaching ifnet instance %p\n", __func__, ifp); 3570 #endif 3571 /* 3572 * ifp may already be nulled out if we are being reentered 3573 * to delete the ll_ifma. 3574 */ 3575 if (ifp != NULL) { 3576 rt_newmaddrmsg(RTM_DELMADDR, ifma); 3577 ifma->ifma_ifp = NULL; 3578 } 3579 } 3580 3581 if (--ifma->ifma_refcount > 0) 3582 return 0; 3583 3584 /* 3585 * If this ifma is a network-layer ifma, a link-layer ifma may 3586 * have been associated with it. Release it first if so. 3587 */ 3588 ll_ifma = ifma->ifma_llifma; 3589 if (ll_ifma != NULL) { 3590 KASSERT(ifma->ifma_lladdr != NULL, 3591 ("%s: llifma w/o lladdr", __func__)); 3592 if (detaching) 3593 ll_ifma->ifma_ifp = NULL; /* XXX */ 3594 if (--ll_ifma->ifma_refcount == 0) { 3595 if (ifp != NULL) { 3596 TAILQ_REMOVE(&ifp->if_multiaddrs, ll_ifma, 3597 ifma_link); 3598 } 3599 if_freemulti(ll_ifma); 3600 } 3601 } 3602 3603 if (ifp != NULL) 3604 TAILQ_REMOVE(&ifp->if_multiaddrs, ifma, ifma_link); 3605 3606 if_freemulti(ifma); 3607 3608 /* 3609 * The last reference to this instance of struct ifmultiaddr 3610 * was released; the hardware should be notified of this change. 3611 */ 3612 return 1; 3613 } 3614 3615 /* 3616 * Set the link layer address on an interface. 3617 * 3618 * At this time we only support certain types of interfaces, 3619 * and we don't allow the length of the address to change. 3620 * 3621 * Set noinline to be dtrace-friendly 3622 */ 3623 __noinline int 3624 if_setlladdr(struct ifnet *ifp, const u_char *lladdr, int len) 3625 { 3626 struct sockaddr_dl *sdl; 3627 struct ifaddr *ifa; 3628 struct ifreq ifr; 3629 3630 IF_ADDR_RLOCK(ifp); 3631 ifa = ifp->if_addr; 3632 if (ifa == NULL) { 3633 IF_ADDR_RUNLOCK(ifp); 3634 return (EINVAL); 3635 } 3636 ifa_ref(ifa); 3637 IF_ADDR_RUNLOCK(ifp); 3638 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 3639 if (sdl == NULL) { 3640 ifa_free(ifa); 3641 return (EINVAL); 3642 } 3643 if (len != sdl->sdl_alen) { /* don't allow length to change */ 3644 ifa_free(ifa); 3645 return (EINVAL); 3646 } 3647 switch (ifp->if_type) { 3648 case IFT_ETHER: 3649 case IFT_FDDI: 3650 case IFT_XETHER: 3651 case IFT_L2VLAN: 3652 case IFT_BRIDGE: 3653 case IFT_ARCNET: 3654 case IFT_IEEE8023ADLAG: 3655 bcopy(lladdr, LLADDR(sdl), len); 3656 ifa_free(ifa); 3657 break; 3658 default: 3659 ifa_free(ifa); 3660 return (ENODEV); 3661 } 3662 3663 /* 3664 * If the interface is already up, we need 3665 * to re-init it in order to reprogram its 3666 * address filter. 3667 */ 3668 if ((ifp->if_flags & IFF_UP) != 0) { 3669 if (ifp->if_ioctl) { 3670 ifp->if_flags &= ~IFF_UP; 3671 ifr.ifr_flags = ifp->if_flags & 0xffff; 3672 ifr.ifr_flagshigh = ifp->if_flags >> 16; 3673 (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr); 3674 ifp->if_flags |= IFF_UP; 3675 ifr.ifr_flags = ifp->if_flags & 0xffff; 3676 ifr.ifr_flagshigh = ifp->if_flags >> 16; 3677 (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr); 3678 } 3679 } 3680 EVENTHANDLER_INVOKE(iflladdr_event, ifp); 3681 return (0); 3682 } 3683 3684 /* 3685 * Compat function for handling basic encapsulation requests. 3686 * Not converted stacks (FDDI, IB, ..) supports traditional 3687 * output model: ARP (and other similar L2 protocols) are handled 3688 * inside output routine, arpresolve/nd6_resolve() returns MAC 3689 * address instead of full prepend. 3690 * 3691 * This function creates calculated header==MAC for IPv4/IPv6 and 3692 * returns EAFNOSUPPORT (which is then handled in ARP code) for other 3693 * address families. 3694 */ 3695 static int 3696 if_requestencap_default(struct ifnet *ifp, struct if_encap_req *req) 3697 { 3698 3699 if (req->rtype != IFENCAP_LL) 3700 return (EOPNOTSUPP); 3701 3702 if (req->bufsize < req->lladdr_len) 3703 return (ENOMEM); 3704 3705 switch (req->family) { 3706 case AF_INET: 3707 case AF_INET6: 3708 break; 3709 default: 3710 return (EAFNOSUPPORT); 3711 } 3712 3713 /* Copy lladdr to storage as is */ 3714 memmove(req->buf, req->lladdr, req->lladdr_len); 3715 req->bufsize = req->lladdr_len; 3716 req->lladdr_off = 0; 3717 3718 return (0); 3719 } 3720 3721 /* 3722 * Get the link layer address that was read from the hardware at attach. 3723 * 3724 * This is only set by Ethernet NICs (IFT_ETHER), but laggX interfaces re-type 3725 * their component interfaces as IFT_IEEE8023ADLAG. 3726 */ 3727 int 3728 if_gethwaddr(struct ifnet *ifp, struct ifreq *ifr) 3729 { 3730 3731 if (ifp->if_hw_addr == NULL) 3732 return (ENODEV); 3733 3734 switch (ifp->if_type) { 3735 case IFT_ETHER: 3736 case IFT_IEEE8023ADLAG: 3737 bcopy(ifp->if_hw_addr, ifr->ifr_addr.sa_data, ifp->if_addrlen); 3738 return (0); 3739 default: 3740 return (ENODEV); 3741 } 3742 } 3743 3744 /* 3745 * The name argument must be a pointer to storage which will last as 3746 * long as the interface does. For physical devices, the result of 3747 * device_get_name(dev) is a good choice and for pseudo-devices a 3748 * static string works well. 3749 */ 3750 void 3751 if_initname(struct ifnet *ifp, const char *name, int unit) 3752 { 3753 ifp->if_dname = name; 3754 ifp->if_dunit = unit; 3755 if (unit != IF_DUNIT_NONE) 3756 snprintf(ifp->if_xname, IFNAMSIZ, "%s%d", name, unit); 3757 else 3758 strlcpy(ifp->if_xname, name, IFNAMSIZ); 3759 } 3760 3761 int 3762 if_printf(struct ifnet *ifp, const char * fmt, ...) 3763 { 3764 va_list ap; 3765 int retval; 3766 3767 retval = printf("%s: ", ifp->if_xname); 3768 va_start(ap, fmt); 3769 retval += vprintf(fmt, ap); 3770 va_end(ap); 3771 return (retval); 3772 } 3773 3774 void 3775 if_start(struct ifnet *ifp) 3776 { 3777 3778 (*(ifp)->if_start)(ifp); 3779 } 3780 3781 /* 3782 * Backwards compatibility interface for drivers 3783 * that have not implemented it 3784 */ 3785 static int 3786 if_transmit(struct ifnet *ifp, struct mbuf *m) 3787 { 3788 int error; 3789 3790 IFQ_HANDOFF(ifp, m, error); 3791 return (error); 3792 } 3793 3794 static void 3795 if_input_default(struct ifnet *ifp __unused, struct mbuf *m) 3796 { 3797 3798 m_freem(m); 3799 } 3800 3801 int 3802 if_handoff(struct ifqueue *ifq, struct mbuf *m, struct ifnet *ifp, int adjust) 3803 { 3804 int active = 0; 3805 3806 IF_LOCK(ifq); 3807 if (_IF_QFULL(ifq)) { 3808 IF_UNLOCK(ifq); 3809 if_inc_counter(ifp, IFCOUNTER_OQDROPS, 1); 3810 m_freem(m); 3811 return (0); 3812 } 3813 if (ifp != NULL) { 3814 if_inc_counter(ifp, IFCOUNTER_OBYTES, m->m_pkthdr.len + adjust); 3815 if (m->m_flags & (M_BCAST|M_MCAST)) 3816 if_inc_counter(ifp, IFCOUNTER_OMCASTS, 1); 3817 active = ifp->if_drv_flags & IFF_DRV_OACTIVE; 3818 } 3819 _IF_ENQUEUE(ifq, m); 3820 IF_UNLOCK(ifq); 3821 if (ifp != NULL && !active) 3822 (*(ifp)->if_start)(ifp); 3823 return (1); 3824 } 3825 3826 void 3827 if_register_com_alloc(u_char type, 3828 if_com_alloc_t *a, if_com_free_t *f) 3829 { 3830 3831 KASSERT(if_com_alloc[type] == NULL, 3832 ("if_register_com_alloc: %d already registered", type)); 3833 KASSERT(if_com_free[type] == NULL, 3834 ("if_register_com_alloc: %d free already registered", type)); 3835 3836 if_com_alloc[type] = a; 3837 if_com_free[type] = f; 3838 } 3839 3840 void 3841 if_deregister_com_alloc(u_char type) 3842 { 3843 3844 KASSERT(if_com_alloc[type] != NULL, 3845 ("if_deregister_com_alloc: %d not registered", type)); 3846 KASSERT(if_com_free[type] != NULL, 3847 ("if_deregister_com_alloc: %d free not registered", type)); 3848 if_com_alloc[type] = NULL; 3849 if_com_free[type] = NULL; 3850 } 3851 3852 /* API for driver access to network stack owned ifnet.*/ 3853 uint64_t 3854 if_setbaudrate(struct ifnet *ifp, uint64_t baudrate) 3855 { 3856 uint64_t oldbrate; 3857 3858 oldbrate = ifp->if_baudrate; 3859 ifp->if_baudrate = baudrate; 3860 return (oldbrate); 3861 } 3862 3863 uint64_t 3864 if_getbaudrate(if_t ifp) 3865 { 3866 3867 return (((struct ifnet *)ifp)->if_baudrate); 3868 } 3869 3870 int 3871 if_setcapabilities(if_t ifp, int capabilities) 3872 { 3873 ((struct ifnet *)ifp)->if_capabilities = capabilities; 3874 return (0); 3875 } 3876 3877 int 3878 if_setcapabilitiesbit(if_t ifp, int setbit, int clearbit) 3879 { 3880 ((struct ifnet *)ifp)->if_capabilities |= setbit; 3881 ((struct ifnet *)ifp)->if_capabilities &= ~clearbit; 3882 3883 return (0); 3884 } 3885 3886 int 3887 if_getcapabilities(if_t ifp) 3888 { 3889 return ((struct ifnet *)ifp)->if_capabilities; 3890 } 3891 3892 int 3893 if_setcapenable(if_t ifp, int capabilities) 3894 { 3895 ((struct ifnet *)ifp)->if_capenable = capabilities; 3896 return (0); 3897 } 3898 3899 int 3900 if_setcapenablebit(if_t ifp, int setcap, int clearcap) 3901 { 3902 if(setcap) 3903 ((struct ifnet *)ifp)->if_capenable |= setcap; 3904 if(clearcap) 3905 ((struct ifnet *)ifp)->if_capenable &= ~clearcap; 3906 3907 return (0); 3908 } 3909 3910 const char * 3911 if_getdname(if_t ifp) 3912 { 3913 return ((struct ifnet *)ifp)->if_dname; 3914 } 3915 3916 int 3917 if_togglecapenable(if_t ifp, int togglecap) 3918 { 3919 ((struct ifnet *)ifp)->if_capenable ^= togglecap; 3920 return (0); 3921 } 3922 3923 int 3924 if_getcapenable(if_t ifp) 3925 { 3926 return ((struct ifnet *)ifp)->if_capenable; 3927 } 3928 3929 /* 3930 * This is largely undesirable because it ties ifnet to a device, but does 3931 * provide flexiblity for an embedded product vendor. Should be used with 3932 * the understanding that it violates the interface boundaries, and should be 3933 * a last resort only. 3934 */ 3935 int 3936 if_setdev(if_t ifp, void *dev) 3937 { 3938 return (0); 3939 } 3940 3941 int 3942 if_setdrvflagbits(if_t ifp, int set_flags, int clear_flags) 3943 { 3944 ((struct ifnet *)ifp)->if_drv_flags |= set_flags; 3945 ((struct ifnet *)ifp)->if_drv_flags &= ~clear_flags; 3946 3947 return (0); 3948 } 3949 3950 int 3951 if_getdrvflags(if_t ifp) 3952 { 3953 return ((struct ifnet *)ifp)->if_drv_flags; 3954 } 3955 3956 int 3957 if_setdrvflags(if_t ifp, int flags) 3958 { 3959 ((struct ifnet *)ifp)->if_drv_flags = flags; 3960 return (0); 3961 } 3962 3963 3964 int 3965 if_setflags(if_t ifp, int flags) 3966 { 3967 ((struct ifnet *)ifp)->if_flags = flags; 3968 return (0); 3969 } 3970 3971 int 3972 if_setflagbits(if_t ifp, int set, int clear) 3973 { 3974 ((struct ifnet *)ifp)->if_flags |= set; 3975 ((struct ifnet *)ifp)->if_flags &= ~clear; 3976 3977 return (0); 3978 } 3979 3980 int 3981 if_getflags(if_t ifp) 3982 { 3983 return ((struct ifnet *)ifp)->if_flags; 3984 } 3985 3986 int 3987 if_clearhwassist(if_t ifp) 3988 { 3989 ((struct ifnet *)ifp)->if_hwassist = 0; 3990 return (0); 3991 } 3992 3993 int 3994 if_sethwassistbits(if_t ifp, int toset, int toclear) 3995 { 3996 ((struct ifnet *)ifp)->if_hwassist |= toset; 3997 ((struct ifnet *)ifp)->if_hwassist &= ~toclear; 3998 3999 return (0); 4000 } 4001 4002 int 4003 if_sethwassist(if_t ifp, int hwassist_bit) 4004 { 4005 ((struct ifnet *)ifp)->if_hwassist = hwassist_bit; 4006 return (0); 4007 } 4008 4009 int 4010 if_gethwassist(if_t ifp) 4011 { 4012 return ((struct ifnet *)ifp)->if_hwassist; 4013 } 4014 4015 int 4016 if_setmtu(if_t ifp, int mtu) 4017 { 4018 ((struct ifnet *)ifp)->if_mtu = mtu; 4019 return (0); 4020 } 4021 4022 int 4023 if_getmtu(if_t ifp) 4024 { 4025 return ((struct ifnet *)ifp)->if_mtu; 4026 } 4027 4028 int 4029 if_getmtu_family(if_t ifp, int family) 4030 { 4031 struct domain *dp; 4032 4033 for (dp = domains; dp; dp = dp->dom_next) { 4034 if (dp->dom_family == family && dp->dom_ifmtu != NULL) 4035 return (dp->dom_ifmtu((struct ifnet *)ifp)); 4036 } 4037 4038 return (((struct ifnet *)ifp)->if_mtu); 4039 } 4040 4041 int 4042 if_setsoftc(if_t ifp, void *softc) 4043 { 4044 ((struct ifnet *)ifp)->if_softc = softc; 4045 return (0); 4046 } 4047 4048 void * 4049 if_getsoftc(if_t ifp) 4050 { 4051 return ((struct ifnet *)ifp)->if_softc; 4052 } 4053 4054 void 4055 if_setrcvif(struct mbuf *m, if_t ifp) 4056 { 4057 m->m_pkthdr.rcvif = (struct ifnet *)ifp; 4058 } 4059 4060 void 4061 if_setvtag(struct mbuf *m, uint16_t tag) 4062 { 4063 m->m_pkthdr.ether_vtag = tag; 4064 } 4065 4066 uint16_t 4067 if_getvtag(struct mbuf *m) 4068 { 4069 4070 return (m->m_pkthdr.ether_vtag); 4071 } 4072 4073 int 4074 if_sendq_empty(if_t ifp) 4075 { 4076 return IFQ_DRV_IS_EMPTY(&((struct ifnet *)ifp)->if_snd); 4077 } 4078 4079 struct ifaddr * 4080 if_getifaddr(if_t ifp) 4081 { 4082 return ((struct ifnet *)ifp)->if_addr; 4083 } 4084 4085 int 4086 if_getamcount(if_t ifp) 4087 { 4088 return ((struct ifnet *)ifp)->if_amcount; 4089 } 4090 4091 4092 int 4093 if_setsendqready(if_t ifp) 4094 { 4095 IFQ_SET_READY(&((struct ifnet *)ifp)->if_snd); 4096 return (0); 4097 } 4098 4099 int 4100 if_setsendqlen(if_t ifp, int tx_desc_count) 4101 { 4102 IFQ_SET_MAXLEN(&((struct ifnet *)ifp)->if_snd, tx_desc_count); 4103 ((struct ifnet *)ifp)->if_snd.ifq_drv_maxlen = tx_desc_count; 4104 4105 return (0); 4106 } 4107 4108 int 4109 if_vlantrunkinuse(if_t ifp) 4110 { 4111 return ((struct ifnet *)ifp)->if_vlantrunk != NULL?1:0; 4112 } 4113 4114 int 4115 if_input(if_t ifp, struct mbuf* sendmp) 4116 { 4117 (*((struct ifnet *)ifp)->if_input)((struct ifnet *)ifp, sendmp); 4118 return (0); 4119 4120 } 4121 4122 /* XXX */ 4123 #ifndef ETH_ADDR_LEN 4124 #define ETH_ADDR_LEN 6 4125 #endif 4126 4127 int 4128 if_setupmultiaddr(if_t ifp, void *mta, int *cnt, int max) 4129 { 4130 struct ifmultiaddr *ifma; 4131 uint8_t *lmta = (uint8_t *)mta; 4132 int mcnt = 0; 4133 4134 TAILQ_FOREACH(ifma, &((struct ifnet *)ifp)->if_multiaddrs, ifma_link) { 4135 if (ifma->ifma_addr->sa_family != AF_LINK) 4136 continue; 4137 4138 if (mcnt == max) 4139 break; 4140 4141 bcopy(LLADDR((struct sockaddr_dl *)ifma->ifma_addr), 4142 &lmta[mcnt * ETH_ADDR_LEN], ETH_ADDR_LEN); 4143 mcnt++; 4144 } 4145 *cnt = mcnt; 4146 4147 return (0); 4148 } 4149 4150 int 4151 if_multiaddr_array(if_t ifp, void *mta, int *cnt, int max) 4152 { 4153 int error; 4154 4155 if_maddr_rlock(ifp); 4156 error = if_setupmultiaddr(ifp, mta, cnt, max); 4157 if_maddr_runlock(ifp); 4158 return (error); 4159 } 4160 4161 int 4162 if_multiaddr_count(if_t ifp, int max) 4163 { 4164 struct ifmultiaddr *ifma; 4165 int count; 4166 4167 count = 0; 4168 if_maddr_rlock(ifp); 4169 TAILQ_FOREACH(ifma, &((struct ifnet *)ifp)->if_multiaddrs, ifma_link) { 4170 if (ifma->ifma_addr->sa_family != AF_LINK) 4171 continue; 4172 count++; 4173 if (count == max) 4174 break; 4175 } 4176 if_maddr_runlock(ifp); 4177 return (count); 4178 } 4179 4180 int 4181 if_multi_apply(struct ifnet *ifp, int (*filter)(void *, struct ifmultiaddr *, int), void *arg) 4182 { 4183 struct ifmultiaddr *ifma; 4184 int cnt = 0; 4185 4186 if_maddr_rlock(ifp); 4187 TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) 4188 cnt += filter(arg, ifma, cnt); 4189 if_maddr_runlock(ifp); 4190 return (cnt); 4191 } 4192 4193 struct mbuf * 4194 if_dequeue(if_t ifp) 4195 { 4196 struct mbuf *m; 4197 IFQ_DRV_DEQUEUE(&((struct ifnet *)ifp)->if_snd, m); 4198 4199 return (m); 4200 } 4201 4202 int 4203 if_sendq_prepend(if_t ifp, struct mbuf *m) 4204 { 4205 IFQ_DRV_PREPEND(&((struct ifnet *)ifp)->if_snd, m); 4206 return (0); 4207 } 4208 4209 int 4210 if_setifheaderlen(if_t ifp, int len) 4211 { 4212 ((struct ifnet *)ifp)->if_hdrlen = len; 4213 return (0); 4214 } 4215 4216 caddr_t 4217 if_getlladdr(if_t ifp) 4218 { 4219 return (IF_LLADDR((struct ifnet *)ifp)); 4220 } 4221 4222 void * 4223 if_gethandle(u_char type) 4224 { 4225 return (if_alloc(type)); 4226 } 4227 4228 void 4229 if_bpfmtap(if_t ifh, struct mbuf *m) 4230 { 4231 struct ifnet *ifp = (struct ifnet *)ifh; 4232 4233 BPF_MTAP(ifp, m); 4234 } 4235 4236 void 4237 if_etherbpfmtap(if_t ifh, struct mbuf *m) 4238 { 4239 struct ifnet *ifp = (struct ifnet *)ifh; 4240 4241 ETHER_BPF_MTAP(ifp, m); 4242 } 4243 4244 void 4245 if_vlancap(if_t ifh) 4246 { 4247 struct ifnet *ifp = (struct ifnet *)ifh; 4248 VLAN_CAPABILITIES(ifp); 4249 } 4250 4251 int 4252 if_sethwtsomax(if_t ifp, u_int if_hw_tsomax) 4253 { 4254 4255 ((struct ifnet *)ifp)->if_hw_tsomax = if_hw_tsomax; 4256 return (0); 4257 } 4258 4259 int 4260 if_sethwtsomaxsegcount(if_t ifp, u_int if_hw_tsomaxsegcount) 4261 { 4262 4263 ((struct ifnet *)ifp)->if_hw_tsomaxsegcount = if_hw_tsomaxsegcount; 4264 return (0); 4265 } 4266 4267 int 4268 if_sethwtsomaxsegsize(if_t ifp, u_int if_hw_tsomaxsegsize) 4269 { 4270 4271 ((struct ifnet *)ifp)->if_hw_tsomaxsegsize = if_hw_tsomaxsegsize; 4272 return (0); 4273 } 4274 4275 u_int 4276 if_gethwtsomax(if_t ifp) 4277 { 4278 4279 return (((struct ifnet *)ifp)->if_hw_tsomax); 4280 } 4281 4282 u_int 4283 if_gethwtsomaxsegcount(if_t ifp) 4284 { 4285 4286 return (((struct ifnet *)ifp)->if_hw_tsomaxsegcount); 4287 } 4288 4289 u_int 4290 if_gethwtsomaxsegsize(if_t ifp) 4291 { 4292 4293 return (((struct ifnet *)ifp)->if_hw_tsomaxsegsize); 4294 } 4295 4296 void 4297 if_setinitfn(if_t ifp, void (*init_fn)(void *)) 4298 { 4299 ((struct ifnet *)ifp)->if_init = init_fn; 4300 } 4301 4302 void 4303 if_setioctlfn(if_t ifp, int (*ioctl_fn)(if_t, u_long, caddr_t)) 4304 { 4305 ((struct ifnet *)ifp)->if_ioctl = (void *)ioctl_fn; 4306 } 4307 4308 void 4309 if_setstartfn(if_t ifp, void (*start_fn)(if_t)) 4310 { 4311 ((struct ifnet *)ifp)->if_start = (void *)start_fn; 4312 } 4313 4314 void 4315 if_settransmitfn(if_t ifp, if_transmit_fn_t start_fn) 4316 { 4317 ((struct ifnet *)ifp)->if_transmit = start_fn; 4318 } 4319 4320 void if_setqflushfn(if_t ifp, if_qflush_fn_t flush_fn) 4321 { 4322 ((struct ifnet *)ifp)->if_qflush = flush_fn; 4323 4324 } 4325 4326 void 4327 if_setgetcounterfn(if_t ifp, if_get_counter_t fn) 4328 { 4329 4330 ifp->if_get_counter = fn; 4331 } 4332 4333 /* Revisit these - These are inline functions originally. */ 4334 int 4335 drbr_inuse_drv(if_t ifh, struct buf_ring *br) 4336 { 4337 return drbr_inuse(ifh, br); 4338 } 4339 4340 struct mbuf* 4341 drbr_dequeue_drv(if_t ifh, struct buf_ring *br) 4342 { 4343 return drbr_dequeue(ifh, br); 4344 } 4345 4346 int 4347 drbr_needs_enqueue_drv(if_t ifh, struct buf_ring *br) 4348 { 4349 return drbr_needs_enqueue(ifh, br); 4350 } 4351 4352 int 4353 drbr_enqueue_drv(if_t ifh, struct buf_ring *br, struct mbuf *m) 4354 { 4355 return drbr_enqueue(ifh, br, m); 4356 4357 } 4358