1 /*- 2 * SPDX-License-Identifier: BSD-3-Clause 3 * 4 * Copyright (c) 2010 Bjoern A. Zeeb <bz@FreeBSD.org> 5 * Copyright (c) 1980, 1986, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 * 32 * @(#)if.c 8.5 (Berkeley) 1/9/95 33 * $FreeBSD$ 34 */ 35 36 #include "opt_bpf.h" 37 #include "opt_inet6.h" 38 #include "opt_inet.h" 39 #include "opt_ddb.h" 40 41 #include <sys/param.h> 42 #include <sys/capsicum.h> 43 #include <sys/conf.h> 44 #include <sys/eventhandler.h> 45 #include <sys/malloc.h> 46 #include <sys/domainset.h> 47 #include <sys/sbuf.h> 48 #include <sys/bus.h> 49 #include <sys/epoch.h> 50 #include <sys/mbuf.h> 51 #include <sys/systm.h> 52 #include <sys/priv.h> 53 #include <sys/proc.h> 54 #include <sys/socket.h> 55 #include <sys/socketvar.h> 56 #include <sys/protosw.h> 57 #include <sys/kernel.h> 58 #include <sys/lock.h> 59 #include <sys/refcount.h> 60 #include <sys/module.h> 61 #include <sys/rwlock.h> 62 #include <sys/sockio.h> 63 #include <sys/syslog.h> 64 #include <sys/sysctl.h> 65 #include <sys/sysent.h> 66 #include <sys/taskqueue.h> 67 #include <sys/domain.h> 68 #include <sys/jail.h> 69 #include <sys/priv.h> 70 71 #ifdef DDB 72 #include <ddb/ddb.h> 73 #endif 74 75 #include <machine/stdarg.h> 76 #include <vm/uma.h> 77 78 #include <net/bpf.h> 79 #include <net/ethernet.h> 80 #include <net/if.h> 81 #include <net/if_arp.h> 82 #include <net/if_clone.h> 83 #include <net/if_dl.h> 84 #include <net/if_types.h> 85 #include <net/if_var.h> 86 #include <net/if_media.h> 87 #include <net/if_mib.h> 88 #include <net/if_vlan_var.h> 89 #include <net/radix.h> 90 #include <net/route.h> 91 #include <net/route/route_ctl.h> 92 #include <net/vnet.h> 93 94 #if defined(INET) || defined(INET6) 95 #include <net/ethernet.h> 96 #include <netinet/in.h> 97 #include <netinet/in_var.h> 98 #include <netinet/ip.h> 99 #include <netinet/ip_carp.h> 100 #ifdef INET 101 #include <net/debugnet.h> 102 #include <netinet/if_ether.h> 103 #endif /* INET */ 104 #ifdef INET6 105 #include <netinet6/in6_var.h> 106 #include <netinet6/in6_ifattach.h> 107 #endif /* INET6 */ 108 #endif /* INET || INET6 */ 109 110 #include <security/mac/mac_framework.h> 111 112 /* 113 * Consumers of struct ifreq such as tcpdump assume no pad between ifr_name 114 * and ifr_ifru when it is used in SIOCGIFCONF. 115 */ 116 _Static_assert(sizeof(((struct ifreq *)0)->ifr_name) == 117 offsetof(struct ifreq, ifr_ifru), "gap between ifr_name and ifr_ifru"); 118 119 __read_mostly epoch_t net_epoch_preempt; 120 #ifdef COMPAT_FREEBSD32 121 #include <sys/mount.h> 122 #include <compat/freebsd32/freebsd32.h> 123 124 struct ifreq_buffer32 { 125 uint32_t length; /* (size_t) */ 126 uint32_t buffer; /* (void *) */ 127 }; 128 129 /* 130 * Interface request structure used for socket 131 * ioctl's. All interface ioctl's must have parameter 132 * definitions which begin with ifr_name. The 133 * remainder may be interface specific. 134 */ 135 struct ifreq32 { 136 char ifr_name[IFNAMSIZ]; /* if name, e.g. "en0" */ 137 union { 138 struct sockaddr ifru_addr; 139 struct sockaddr ifru_dstaddr; 140 struct sockaddr ifru_broadaddr; 141 struct ifreq_buffer32 ifru_buffer; 142 short ifru_flags[2]; 143 short ifru_index; 144 int ifru_jid; 145 int ifru_metric; 146 int ifru_mtu; 147 int ifru_phys; 148 int ifru_media; 149 uint32_t ifru_data; 150 int ifru_cap[2]; 151 u_int ifru_fib; 152 u_char ifru_vlan_pcp; 153 } ifr_ifru; 154 }; 155 CTASSERT(sizeof(struct ifreq) == sizeof(struct ifreq32)); 156 CTASSERT(__offsetof(struct ifreq, ifr_ifru) == 157 __offsetof(struct ifreq32, ifr_ifru)); 158 159 struct ifconf32 { 160 int32_t ifc_len; 161 union { 162 uint32_t ifcu_buf; 163 uint32_t ifcu_req; 164 } ifc_ifcu; 165 }; 166 #define SIOCGIFCONF32 _IOWR('i', 36, struct ifconf32) 167 168 struct ifdrv32 { 169 char ifd_name[IFNAMSIZ]; 170 uint32_t ifd_cmd; 171 uint32_t ifd_len; 172 uint32_t ifd_data; 173 }; 174 #define SIOCSDRVSPEC32 _IOC_NEWTYPE(SIOCSDRVSPEC, struct ifdrv32) 175 #define SIOCGDRVSPEC32 _IOC_NEWTYPE(SIOCGDRVSPEC, struct ifdrv32) 176 177 struct ifgroupreq32 { 178 char ifgr_name[IFNAMSIZ]; 179 u_int ifgr_len; 180 union { 181 char ifgru_group[IFNAMSIZ]; 182 uint32_t ifgru_groups; 183 } ifgr_ifgru; 184 }; 185 #define SIOCAIFGROUP32 _IOC_NEWTYPE(SIOCAIFGROUP, struct ifgroupreq32) 186 #define SIOCGIFGROUP32 _IOC_NEWTYPE(SIOCGIFGROUP, struct ifgroupreq32) 187 #define SIOCDIFGROUP32 _IOC_NEWTYPE(SIOCDIFGROUP, struct ifgroupreq32) 188 #define SIOCGIFGMEMB32 _IOC_NEWTYPE(SIOCGIFGMEMB, struct ifgroupreq32) 189 190 struct ifmediareq32 { 191 char ifm_name[IFNAMSIZ]; 192 int ifm_current; 193 int ifm_mask; 194 int ifm_status; 195 int ifm_active; 196 int ifm_count; 197 uint32_t ifm_ulist; /* (int *) */ 198 }; 199 #define SIOCGIFMEDIA32 _IOC_NEWTYPE(SIOCGIFMEDIA, struct ifmediareq32) 200 #define SIOCGIFXMEDIA32 _IOC_NEWTYPE(SIOCGIFXMEDIA, struct ifmediareq32) 201 #endif /* COMPAT_FREEBSD32 */ 202 203 union ifreq_union { 204 struct ifreq ifr; 205 #ifdef COMPAT_FREEBSD32 206 struct ifreq32 ifr32; 207 #endif 208 }; 209 210 SYSCTL_NODE(_net, PF_LINK, link, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 211 "Link layers"); 212 SYSCTL_NODE(_net_link, 0, generic, CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 213 "Generic link-management"); 214 215 SYSCTL_INT(_net_link, OID_AUTO, ifqmaxlen, CTLFLAG_RDTUN, 216 &ifqmaxlen, 0, "max send queue size"); 217 218 /* Log link state change events */ 219 static int log_link_state_change = 1; 220 221 SYSCTL_INT(_net_link, OID_AUTO, log_link_state_change, CTLFLAG_RW, 222 &log_link_state_change, 0, 223 "log interface link state change events"); 224 225 /* Log promiscuous mode change events */ 226 static int log_promisc_mode_change = 1; 227 228 SYSCTL_INT(_net_link, OID_AUTO, log_promisc_mode_change, CTLFLAG_RDTUN, 229 &log_promisc_mode_change, 1, 230 "log promiscuous mode change events"); 231 232 /* Interface description */ 233 static unsigned int ifdescr_maxlen = 1024; 234 SYSCTL_UINT(_net, OID_AUTO, ifdescr_maxlen, CTLFLAG_RW, 235 &ifdescr_maxlen, 0, 236 "administrative maximum length for interface description"); 237 238 static MALLOC_DEFINE(M_IFDESCR, "ifdescr", "ifnet descriptions"); 239 240 /* global sx for non-critical path ifdescr */ 241 static struct sx ifdescr_sx; 242 SX_SYSINIT(ifdescr_sx, &ifdescr_sx, "ifnet descr"); 243 244 void (*ng_ether_link_state_p)(struct ifnet *ifp, int state); 245 void (*lagg_linkstate_p)(struct ifnet *ifp, int state); 246 /* These are external hooks for CARP. */ 247 void (*carp_linkstate_p)(struct ifnet *ifp); 248 void (*carp_demote_adj_p)(int, char *); 249 int (*carp_master_p)(struct ifaddr *); 250 #if defined(INET) || defined(INET6) 251 int (*carp_forus_p)(struct ifnet *ifp, u_char *dhost); 252 int (*carp_output_p)(struct ifnet *ifp, struct mbuf *m, 253 const struct sockaddr *sa); 254 int (*carp_ioctl_p)(struct ifreq *, u_long, struct thread *); 255 int (*carp_attach_p)(struct ifaddr *, int); 256 void (*carp_detach_p)(struct ifaddr *, bool); 257 #endif 258 #ifdef INET 259 int (*carp_iamatch_p)(struct ifaddr *, uint8_t **); 260 #endif 261 #ifdef INET6 262 struct ifaddr *(*carp_iamatch6_p)(struct ifnet *ifp, struct in6_addr *taddr6); 263 caddr_t (*carp_macmatch6_p)(struct ifnet *ifp, struct mbuf *m, 264 const struct in6_addr *taddr); 265 #endif 266 267 struct mbuf *(*tbr_dequeue_ptr)(struct ifaltq *, int) = NULL; 268 269 /* 270 * XXX: Style; these should be sorted alphabetically, and unprototyped 271 * static functions should be prototyped. Currently they are sorted by 272 * declaration order. 273 */ 274 static void if_attachdomain(void *); 275 static void if_attachdomain1(struct ifnet *); 276 static int ifconf(u_long, caddr_t); 277 static void if_input_default(struct ifnet *, struct mbuf *); 278 static int if_requestencap_default(struct ifnet *, struct if_encap_req *); 279 static void if_route(struct ifnet *, int flag, int fam); 280 static int if_setflag(struct ifnet *, int, int, int *, int); 281 static int if_transmit(struct ifnet *ifp, struct mbuf *m); 282 static void if_unroute(struct ifnet *, int flag, int fam); 283 static int if_delmulti_locked(struct ifnet *, struct ifmultiaddr *, int); 284 static void do_link_state_change(void *, int); 285 static int if_getgroup(struct ifgroupreq *, struct ifnet *); 286 static int if_getgroupmembers(struct ifgroupreq *); 287 static void if_delgroups(struct ifnet *); 288 static void if_attach_internal(struct ifnet *, bool); 289 static int if_detach_internal(struct ifnet *, bool); 290 static void if_siocaddmulti(void *, int); 291 static void if_link_ifnet(struct ifnet *); 292 static bool if_unlink_ifnet(struct ifnet *, bool); 293 #ifdef VIMAGE 294 static int if_vmove(struct ifnet *, struct vnet *); 295 #endif 296 297 #ifdef INET6 298 /* 299 * XXX: declare here to avoid to include many inet6 related files.. 300 * should be more generalized? 301 */ 302 extern void nd6_setmtu(struct ifnet *); 303 #endif 304 305 /* ipsec helper hooks */ 306 VNET_DEFINE(struct hhook_head *, ipsec_hhh_in[HHOOK_IPSEC_COUNT]); 307 VNET_DEFINE(struct hhook_head *, ipsec_hhh_out[HHOOK_IPSEC_COUNT]); 308 309 int ifqmaxlen = IFQ_MAXLEN; 310 VNET_DEFINE(struct ifnethead, ifnet); /* depend on static init XXX */ 311 VNET_DEFINE(struct ifgrouphead, ifg_head); 312 313 /* Table of ifnet by index. */ 314 static int if_index; 315 static int if_indexlim = 8; 316 static struct ifindex_entry { 317 struct ifnet *ife_ifnet; 318 uint16_t ife_gencnt; 319 } *ifindex_table; 320 321 SYSCTL_NODE(_net_link_generic, IFMIB_SYSTEM, system, 322 CTLFLAG_RW | CTLFLAG_MPSAFE, 0, 323 "Variables global to all interfaces"); 324 static int 325 sysctl_ifcount(SYSCTL_HANDLER_ARGS) 326 { 327 int rv = 0; 328 329 IFNET_RLOCK(); 330 for (int i = 1; i <= if_index; i++) 331 if (ifindex_table[i].ife_ifnet != NULL && 332 ifindex_table[i].ife_ifnet->if_vnet == curvnet) 333 rv = i; 334 IFNET_RUNLOCK(); 335 336 return (sysctl_handle_int(oidp, &rv, 0, req)); 337 } 338 SYSCTL_PROC(_net_link_generic_system, IFMIB_IFCOUNT, ifcount, 339 CTLTYPE_INT | CTLFLAG_VNET | CTLFLAG_RD, NULL, 0, sysctl_ifcount, "I", 340 "Maximum known interface index"); 341 342 /* 343 * The global network interface list (V_ifnet) and related state (such as 344 * if_index, if_indexlim, and ifindex_table) are protected by an sxlock. 345 * This may be acquired to stabilise the list, or we may rely on NET_EPOCH. 346 */ 347 struct sx ifnet_sxlock; 348 SX_SYSINIT_FLAGS(ifnet_sx, &ifnet_sxlock, "ifnet_sx", SX_RECURSE); 349 350 struct sx ifnet_detach_sxlock; 351 SX_SYSINIT_FLAGS(ifnet_detach, &ifnet_detach_sxlock, "ifnet_detach_sx", 352 SX_RECURSE); 353 354 #ifdef VIMAGE 355 #define VNET_IS_SHUTTING_DOWN(_vnet) \ 356 ((_vnet)->vnet_shutdown && (_vnet)->vnet_state < SI_SUB_VNET_DONE) 357 #endif 358 359 static if_com_alloc_t *if_com_alloc[256]; 360 static if_com_free_t *if_com_free[256]; 361 362 static MALLOC_DEFINE(M_IFNET, "ifnet", "interface internals"); 363 MALLOC_DEFINE(M_IFADDR, "ifaddr", "interface address"); 364 MALLOC_DEFINE(M_IFMADDR, "ether_multi", "link-level multicast address"); 365 366 struct ifnet * 367 ifnet_byindex(u_int idx) 368 { 369 struct ifnet *ifp; 370 371 NET_EPOCH_ASSERT(); 372 373 if (__predict_false(idx > if_index)) 374 return (NULL); 375 376 ifp = ck_pr_load_ptr(&ifindex_table[idx].ife_ifnet); 377 378 if (curvnet != NULL && ifp != NULL && ifp->if_vnet != curvnet) 379 ifp = NULL; 380 381 return (ifp); 382 } 383 384 struct ifnet * 385 ifnet_byindex_ref(u_int idx) 386 { 387 struct ifnet *ifp; 388 389 ifp = ifnet_byindex(idx); 390 if (ifp == NULL || (ifp->if_flags & IFF_DYING)) 391 return (NULL); 392 if (!if_try_ref(ifp)) 393 return (NULL); 394 return (ifp); 395 } 396 397 struct ifnet * 398 ifnet_byindexgen(uint16_t idx, uint16_t gen) 399 { 400 struct ifnet *ifp; 401 402 NET_EPOCH_ASSERT(); 403 404 if (__predict_false(idx > if_index)) 405 return (NULL); 406 407 ifp = ck_pr_load_ptr(&ifindex_table[idx].ife_ifnet); 408 409 if (ifindex_table[idx].ife_gencnt == gen) 410 return (ifp); 411 else 412 return (NULL); 413 } 414 415 struct ifaddr * 416 ifaddr_byindex(u_short idx) 417 { 418 struct ifnet *ifp; 419 struct ifaddr *ifa = NULL; 420 421 NET_EPOCH_ASSERT(); 422 423 ifp = ifnet_byindex(idx); 424 if (ifp != NULL && (ifa = ifp->if_addr) != NULL) 425 ifa_ref(ifa); 426 return (ifa); 427 } 428 429 /* 430 * Network interface utility routines. 431 * 432 * Routines with ifa_ifwith* names take sockaddr *'s as 433 * parameters. 434 */ 435 436 static void 437 if_init(void *arg __unused) 438 { 439 440 ifindex_table = malloc(if_indexlim * sizeof(*ifindex_table), 441 M_IFNET, M_WAITOK | M_ZERO); 442 } 443 SYSINIT(if_init, SI_SUB_INIT_IF, SI_ORDER_SECOND, if_init, NULL); 444 445 static void 446 vnet_if_init(const void *unused __unused) 447 { 448 449 CK_STAILQ_INIT(&V_ifnet); 450 CK_STAILQ_INIT(&V_ifg_head); 451 vnet_if_clone_init(); 452 } 453 VNET_SYSINIT(vnet_if_init, SI_SUB_INIT_IF, SI_ORDER_SECOND, vnet_if_init, 454 NULL); 455 456 static void 457 if_link_ifnet(struct ifnet *ifp) 458 { 459 460 IFNET_WLOCK(); 461 CK_STAILQ_INSERT_TAIL(&V_ifnet, ifp, if_link); 462 #ifdef VIMAGE 463 curvnet->vnet_ifcnt++; 464 #endif 465 IFNET_WUNLOCK(); 466 } 467 468 static bool 469 if_unlink_ifnet(struct ifnet *ifp, bool vmove) 470 { 471 struct ifnet *iter; 472 int found = 0; 473 474 IFNET_WLOCK(); 475 CK_STAILQ_FOREACH(iter, &V_ifnet, if_link) 476 if (iter == ifp) { 477 CK_STAILQ_REMOVE(&V_ifnet, ifp, ifnet, if_link); 478 if (!vmove) 479 ifp->if_flags |= IFF_DYING; 480 found = 1; 481 break; 482 } 483 #ifdef VIMAGE 484 curvnet->vnet_ifcnt--; 485 #endif 486 IFNET_WUNLOCK(); 487 488 return (found); 489 } 490 491 #ifdef VIMAGE 492 static void 493 vnet_if_return(const void *unused __unused) 494 { 495 struct ifnet *ifp, *nifp; 496 struct ifnet **pending; 497 int found __diagused; 498 int i; 499 500 i = 0; 501 502 /* 503 * We need to protect our access to the V_ifnet tailq. Ordinarily we'd 504 * enter NET_EPOCH, but that's not possible, because if_vmove() calls 505 * if_detach_internal(), which waits for NET_EPOCH callbacks to 506 * complete. We can't do that from within NET_EPOCH. 507 * 508 * However, we can also use the IFNET_xLOCK, which is the V_ifnet 509 * read/write lock. We cannot hold the lock as we call if_vmove() 510 * though, as that presents LOR w.r.t ifnet_sx, in_multi_sx and iflib 511 * ctx lock. 512 */ 513 IFNET_WLOCK(); 514 515 pending = malloc(sizeof(struct ifnet *) * curvnet->vnet_ifcnt, 516 M_IFNET, M_WAITOK | M_ZERO); 517 518 /* Return all inherited interfaces to their parent vnets. */ 519 CK_STAILQ_FOREACH_SAFE(ifp, &V_ifnet, if_link, nifp) { 520 if (ifp->if_home_vnet != ifp->if_vnet) { 521 found = if_unlink_ifnet(ifp, true); 522 MPASS(found); 523 524 pending[i++] = ifp; 525 } 526 } 527 IFNET_WUNLOCK(); 528 529 for (int j = 0; j < i; j++) { 530 if_vmove(pending[j], pending[j]->if_home_vnet); 531 } 532 533 free(pending, M_IFNET); 534 } 535 VNET_SYSUNINIT(vnet_if_return, SI_SUB_VNET_DONE, SI_ORDER_ANY, 536 vnet_if_return, NULL); 537 #endif 538 539 /* 540 * Allocate a struct ifnet and an index for an interface. A layer 2 541 * common structure will also be allocated if an allocation routine is 542 * registered for the passed type. 543 */ 544 static struct ifnet * 545 if_alloc_domain(u_char type, int numa_domain) 546 { 547 struct ifnet *ifp; 548 u_short idx; 549 550 KASSERT(numa_domain <= IF_NODOM, ("numa_domain too large")); 551 if (numa_domain == IF_NODOM) 552 ifp = malloc(sizeof(struct ifnet), M_IFNET, 553 M_WAITOK | M_ZERO); 554 else 555 ifp = malloc_domainset(sizeof(struct ifnet), M_IFNET, 556 DOMAINSET_PREF(numa_domain), M_WAITOK | M_ZERO); 557 ifp->if_type = type; 558 ifp->if_alloctype = type; 559 ifp->if_numa_domain = numa_domain; 560 #ifdef VIMAGE 561 ifp->if_vnet = curvnet; 562 #endif 563 if (if_com_alloc[type] != NULL) { 564 ifp->if_l2com = if_com_alloc[type](type, ifp); 565 KASSERT(ifp->if_l2com, ("%s: if_com_alloc[%u] failed", __func__, 566 type)); 567 } 568 569 IF_ADDR_LOCK_INIT(ifp); 570 TASK_INIT(&ifp->if_linktask, 0, do_link_state_change, ifp); 571 TASK_INIT(&ifp->if_addmultitask, 0, if_siocaddmulti, ifp); 572 ifp->if_afdata_initialized = 0; 573 IF_AFDATA_LOCK_INIT(ifp); 574 CK_STAILQ_INIT(&ifp->if_addrhead); 575 CK_STAILQ_INIT(&ifp->if_multiaddrs); 576 CK_STAILQ_INIT(&ifp->if_groups); 577 #ifdef MAC 578 mac_ifnet_init(ifp); 579 #endif 580 ifq_init(&ifp->if_snd, ifp); 581 582 refcount_init(&ifp->if_refcount, 1); /* Index reference. */ 583 for (int i = 0; i < IFCOUNTERS; i++) 584 ifp->if_counters[i] = counter_u64_alloc(M_WAITOK); 585 ifp->if_get_counter = if_get_counter_default; 586 ifp->if_pcp = IFNET_PCP_NONE; 587 588 /* Allocate an ifindex array entry. */ 589 IFNET_WLOCK(); 590 /* 591 * Try to find an empty slot below if_index. If we fail, take the 592 * next slot. 593 */ 594 for (idx = 1; idx <= if_index; idx++) { 595 if (ifindex_table[idx].ife_ifnet == NULL) 596 break; 597 } 598 599 /* Catch if_index overflow. */ 600 if (idx >= if_indexlim) { 601 struct ifindex_entry *new, *old; 602 int newlim; 603 604 newlim = if_indexlim * 2; 605 new = malloc(newlim * sizeof(*new), M_IFNET, M_WAITOK | M_ZERO); 606 memcpy(new, ifindex_table, if_indexlim * sizeof(*new)); 607 old = ifindex_table; 608 ck_pr_store_ptr(&ifindex_table, new); 609 if_indexlim = newlim; 610 epoch_wait_preempt(net_epoch_preempt); 611 free(old, M_IFNET); 612 } 613 if (idx > if_index) 614 if_index = idx; 615 616 ifp->if_index = idx; 617 ifp->if_idxgen = ifindex_table[idx].ife_gencnt; 618 ck_pr_store_ptr(&ifindex_table[idx].ife_ifnet, ifp); 619 IFNET_WUNLOCK(); 620 621 return (ifp); 622 } 623 624 struct ifnet * 625 if_alloc_dev(u_char type, device_t dev) 626 { 627 int numa_domain; 628 629 if (dev == NULL || bus_get_domain(dev, &numa_domain) != 0) 630 return (if_alloc_domain(type, IF_NODOM)); 631 return (if_alloc_domain(type, numa_domain)); 632 } 633 634 struct ifnet * 635 if_alloc(u_char type) 636 { 637 638 return (if_alloc_domain(type, IF_NODOM)); 639 } 640 /* 641 * Do the actual work of freeing a struct ifnet, and layer 2 common 642 * structure. This call is made when the network epoch guarantees 643 * us that nobody holds a pointer to the interface. 644 */ 645 static void 646 if_free_deferred(epoch_context_t ctx) 647 { 648 struct ifnet *ifp = __containerof(ctx, struct ifnet, if_epoch_ctx); 649 650 KASSERT((ifp->if_flags & IFF_DYING), 651 ("%s: interface not dying", __func__)); 652 653 if (if_com_free[ifp->if_alloctype] != NULL) 654 if_com_free[ifp->if_alloctype](ifp->if_l2com, 655 ifp->if_alloctype); 656 657 #ifdef MAC 658 mac_ifnet_destroy(ifp); 659 #endif /* MAC */ 660 IF_AFDATA_DESTROY(ifp); 661 IF_ADDR_LOCK_DESTROY(ifp); 662 ifq_delete(&ifp->if_snd); 663 664 for (int i = 0; i < IFCOUNTERS; i++) 665 counter_u64_free(ifp->if_counters[i]); 666 667 free(ifp->if_description, M_IFDESCR); 668 free(ifp->if_hw_addr, M_IFADDR); 669 free(ifp, M_IFNET); 670 } 671 672 /* 673 * Deregister an interface and free the associated storage. 674 */ 675 void 676 if_free(struct ifnet *ifp) 677 { 678 679 ifp->if_flags |= IFF_DYING; /* XXX: Locking */ 680 681 /* 682 * XXXGL: An interface index is really an alias to ifp pointer. 683 * Why would we clear the alias now, and not in the deferred 684 * context? Indeed there is nothing wrong with some network 685 * thread obtaining ifp via ifnet_byindex() inside the network 686 * epoch and then dereferencing ifp while we peform if_free(), 687 * and after if_free() finished, too. 688 * 689 * This early index freeing was important back when ifindex was 690 * virtualized and interface would outlive the vnet. 691 */ 692 IFNET_WLOCK(); 693 MPASS(ifindex_table[ifp->if_index].ife_ifnet == ifp); 694 ck_pr_store_ptr(&ifindex_table[ifp->if_index].ife_ifnet, NULL); 695 ifindex_table[ifp->if_index].ife_gencnt++; 696 while (if_index > 0 && ifindex_table[if_index].ife_ifnet == NULL) 697 if_index--; 698 IFNET_WUNLOCK(); 699 700 if (refcount_release(&ifp->if_refcount)) 701 NET_EPOCH_CALL(if_free_deferred, &ifp->if_epoch_ctx); 702 } 703 704 /* 705 * Interfaces to keep an ifnet type-stable despite the possibility of the 706 * driver calling if_free(). If there are additional references, we defer 707 * freeing the underlying data structure. 708 */ 709 void 710 if_ref(struct ifnet *ifp) 711 { 712 u_int old __diagused; 713 714 /* We don't assert the ifnet list lock here, but arguably should. */ 715 old = refcount_acquire(&ifp->if_refcount); 716 KASSERT(old > 0, ("%s: ifp %p has 0 refs", __func__, ifp)); 717 } 718 719 bool 720 if_try_ref(struct ifnet *ifp) 721 { 722 NET_EPOCH_ASSERT(); 723 return (refcount_acquire_if_not_zero(&ifp->if_refcount)); 724 } 725 726 void 727 if_rele(struct ifnet *ifp) 728 { 729 730 if (!refcount_release(&ifp->if_refcount)) 731 return; 732 NET_EPOCH_CALL(if_free_deferred, &ifp->if_epoch_ctx); 733 } 734 735 void 736 ifq_init(struct ifaltq *ifq, struct ifnet *ifp) 737 { 738 739 mtx_init(&ifq->ifq_mtx, ifp->if_xname, "if send queue", MTX_DEF); 740 741 if (ifq->ifq_maxlen == 0) 742 ifq->ifq_maxlen = ifqmaxlen; 743 744 ifq->altq_type = 0; 745 ifq->altq_disc = NULL; 746 ifq->altq_flags &= ALTQF_CANTCHANGE; 747 ifq->altq_tbr = NULL; 748 ifq->altq_ifp = ifp; 749 } 750 751 void 752 ifq_delete(struct ifaltq *ifq) 753 { 754 mtx_destroy(&ifq->ifq_mtx); 755 } 756 757 /* 758 * Perform generic interface initialization tasks and attach the interface 759 * to the list of "active" interfaces. If vmove flag is set on entry 760 * to if_attach_internal(), perform only a limited subset of initialization 761 * tasks, given that we are moving from one vnet to another an ifnet which 762 * has already been fully initialized. 763 * 764 * Note that if_detach_internal() removes group membership unconditionally 765 * even when vmove flag is set, and if_attach_internal() adds only IFG_ALL. 766 * Thus, when if_vmove() is applied to a cloned interface, group membership 767 * is lost while a cloned one always joins a group whose name is 768 * ifc->ifc_name. To recover this after if_detach_internal() and 769 * if_attach_internal(), the cloner should be specified to 770 * if_attach_internal() via ifc. If it is non-NULL, if_attach_internal() 771 * attempts to join a group whose name is ifc->ifc_name. 772 * 773 * XXX: 774 * - The decision to return void and thus require this function to 775 * succeed is questionable. 776 * - We should probably do more sanity checking. For instance we don't 777 * do anything to insure if_xname is unique or non-empty. 778 */ 779 void 780 if_attach(struct ifnet *ifp) 781 { 782 783 if_attach_internal(ifp, false); 784 } 785 786 /* 787 * Compute the least common TSO limit. 788 */ 789 void 790 if_hw_tsomax_common(if_t ifp, struct ifnet_hw_tsomax *pmax) 791 { 792 /* 793 * 1) If there is no limit currently, take the limit from 794 * the network adapter. 795 * 796 * 2) If the network adapter has a limit below the current 797 * limit, apply it. 798 */ 799 if (pmax->tsomaxbytes == 0 || (ifp->if_hw_tsomax != 0 && 800 ifp->if_hw_tsomax < pmax->tsomaxbytes)) { 801 pmax->tsomaxbytes = ifp->if_hw_tsomax; 802 } 803 if (pmax->tsomaxsegcount == 0 || (ifp->if_hw_tsomaxsegcount != 0 && 804 ifp->if_hw_tsomaxsegcount < pmax->tsomaxsegcount)) { 805 pmax->tsomaxsegcount = ifp->if_hw_tsomaxsegcount; 806 } 807 if (pmax->tsomaxsegsize == 0 || (ifp->if_hw_tsomaxsegsize != 0 && 808 ifp->if_hw_tsomaxsegsize < pmax->tsomaxsegsize)) { 809 pmax->tsomaxsegsize = ifp->if_hw_tsomaxsegsize; 810 } 811 } 812 813 /* 814 * Update TSO limit of a network adapter. 815 * 816 * Returns zero if no change. Else non-zero. 817 */ 818 int 819 if_hw_tsomax_update(if_t ifp, struct ifnet_hw_tsomax *pmax) 820 { 821 int retval = 0; 822 if (ifp->if_hw_tsomax != pmax->tsomaxbytes) { 823 ifp->if_hw_tsomax = pmax->tsomaxbytes; 824 retval++; 825 } 826 if (ifp->if_hw_tsomaxsegsize != pmax->tsomaxsegsize) { 827 ifp->if_hw_tsomaxsegsize = pmax->tsomaxsegsize; 828 retval++; 829 } 830 if (ifp->if_hw_tsomaxsegcount != pmax->tsomaxsegcount) { 831 ifp->if_hw_tsomaxsegcount = pmax->tsomaxsegcount; 832 retval++; 833 } 834 return (retval); 835 } 836 837 static void 838 if_attach_internal(struct ifnet *ifp, bool vmove) 839 { 840 unsigned socksize, ifasize; 841 int namelen, masklen; 842 struct sockaddr_dl *sdl; 843 struct ifaddr *ifa; 844 845 MPASS(ifindex_table[ifp->if_index].ife_ifnet == ifp); 846 847 #ifdef VIMAGE 848 ifp->if_vnet = curvnet; 849 if (ifp->if_home_vnet == NULL) 850 ifp->if_home_vnet = curvnet; 851 #endif 852 853 if_addgroup(ifp, IFG_ALL); 854 855 #ifdef VIMAGE 856 /* Restore group membership for cloned interface. */ 857 if (vmove) 858 if_clone_restoregroup(ifp); 859 #endif 860 861 getmicrotime(&ifp->if_lastchange); 862 ifp->if_epoch = time_uptime; 863 864 KASSERT((ifp->if_transmit == NULL && ifp->if_qflush == NULL) || 865 (ifp->if_transmit != NULL && ifp->if_qflush != NULL), 866 ("transmit and qflush must both either be set or both be NULL")); 867 if (ifp->if_transmit == NULL) { 868 ifp->if_transmit = if_transmit; 869 ifp->if_qflush = if_qflush; 870 } 871 if (ifp->if_input == NULL) 872 ifp->if_input = if_input_default; 873 874 if (ifp->if_requestencap == NULL) 875 ifp->if_requestencap = if_requestencap_default; 876 877 if (!vmove) { 878 #ifdef MAC 879 mac_ifnet_create(ifp); 880 #endif 881 882 /* 883 * Create a Link Level name for this device. 884 */ 885 namelen = strlen(ifp->if_xname); 886 /* 887 * Always save enough space for any possiable name so we 888 * can do a rename in place later. 889 */ 890 masklen = offsetof(struct sockaddr_dl, sdl_data[0]) + IFNAMSIZ; 891 socksize = masklen + ifp->if_addrlen; 892 if (socksize < sizeof(*sdl)) 893 socksize = sizeof(*sdl); 894 socksize = roundup2(socksize, sizeof(long)); 895 ifasize = sizeof(*ifa) + 2 * socksize; 896 ifa = ifa_alloc(ifasize, M_WAITOK); 897 sdl = (struct sockaddr_dl *)(ifa + 1); 898 sdl->sdl_len = socksize; 899 sdl->sdl_family = AF_LINK; 900 bcopy(ifp->if_xname, sdl->sdl_data, namelen); 901 sdl->sdl_nlen = namelen; 902 sdl->sdl_index = ifp->if_index; 903 sdl->sdl_type = ifp->if_type; 904 ifp->if_addr = ifa; 905 ifa->ifa_ifp = ifp; 906 ifa->ifa_addr = (struct sockaddr *)sdl; 907 sdl = (struct sockaddr_dl *)(socksize + (caddr_t)sdl); 908 ifa->ifa_netmask = (struct sockaddr *)sdl; 909 sdl->sdl_len = masklen; 910 while (namelen != 0) 911 sdl->sdl_data[--namelen] = 0xff; 912 CK_STAILQ_INSERT_HEAD(&ifp->if_addrhead, ifa, ifa_link); 913 /* Reliably crash if used uninitialized. */ 914 ifp->if_broadcastaddr = NULL; 915 916 if (ifp->if_type == IFT_ETHER) { 917 ifp->if_hw_addr = malloc(ifp->if_addrlen, M_IFADDR, 918 M_WAITOK | M_ZERO); 919 } 920 921 #if defined(INET) || defined(INET6) 922 /* Use defaults for TSO, if nothing is set */ 923 if (ifp->if_hw_tsomax == 0 && 924 ifp->if_hw_tsomaxsegcount == 0 && 925 ifp->if_hw_tsomaxsegsize == 0) { 926 /* 927 * The TSO defaults needs to be such that an 928 * NFS mbuf list of 35 mbufs totalling just 929 * below 64K works and that a chain of mbufs 930 * can be defragged into at most 32 segments: 931 */ 932 ifp->if_hw_tsomax = min(IP_MAXPACKET, (32 * MCLBYTES) - 933 (ETHER_HDR_LEN + ETHER_VLAN_ENCAP_LEN)); 934 ifp->if_hw_tsomaxsegcount = 35; 935 ifp->if_hw_tsomaxsegsize = 2048; /* 2K */ 936 937 /* XXX some drivers set IFCAP_TSO after ethernet attach */ 938 if (ifp->if_capabilities & IFCAP_TSO) { 939 if_printf(ifp, "Using defaults for TSO: %u/%u/%u\n", 940 ifp->if_hw_tsomax, 941 ifp->if_hw_tsomaxsegcount, 942 ifp->if_hw_tsomaxsegsize); 943 } 944 } 945 #endif 946 } 947 #ifdef VIMAGE 948 else { 949 /* 950 * Update the interface index in the link layer address 951 * of the interface. 952 */ 953 for (ifa = ifp->if_addr; ifa != NULL; 954 ifa = CK_STAILQ_NEXT(ifa, ifa_link)) { 955 if (ifa->ifa_addr->sa_family == AF_LINK) { 956 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 957 sdl->sdl_index = ifp->if_index; 958 } 959 } 960 } 961 #endif 962 963 if_link_ifnet(ifp); 964 965 if (domain_init_status >= 2) 966 if_attachdomain1(ifp); 967 968 EVENTHANDLER_INVOKE(ifnet_arrival_event, ifp); 969 if (IS_DEFAULT_VNET(curvnet)) 970 devctl_notify("IFNET", ifp->if_xname, "ATTACH", NULL); 971 972 /* Announce the interface. */ 973 rt_ifannouncemsg(ifp, IFAN_ARRIVAL); 974 } 975 976 static void 977 if_epochalloc(void *dummy __unused) 978 { 979 980 net_epoch_preempt = epoch_alloc("Net preemptible", EPOCH_PREEMPT); 981 } 982 SYSINIT(ifepochalloc, SI_SUB_EPOCH, SI_ORDER_ANY, if_epochalloc, NULL); 983 984 static void 985 if_attachdomain(void *dummy) 986 { 987 struct ifnet *ifp; 988 989 CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) 990 if_attachdomain1(ifp); 991 } 992 SYSINIT(domainifattach, SI_SUB_PROTO_IFATTACHDOMAIN, SI_ORDER_SECOND, 993 if_attachdomain, NULL); 994 995 static void 996 if_attachdomain1(struct ifnet *ifp) 997 { 998 struct domain *dp; 999 1000 /* 1001 * Since dp->dom_ifattach calls malloc() with M_WAITOK, we 1002 * cannot lock ifp->if_afdata initialization, entirely. 1003 */ 1004 IF_AFDATA_LOCK(ifp); 1005 if (ifp->if_afdata_initialized >= domain_init_status) { 1006 IF_AFDATA_UNLOCK(ifp); 1007 log(LOG_WARNING, "%s called more than once on %s\n", 1008 __func__, ifp->if_xname); 1009 return; 1010 } 1011 ifp->if_afdata_initialized = domain_init_status; 1012 IF_AFDATA_UNLOCK(ifp); 1013 1014 /* address family dependent data region */ 1015 bzero(ifp->if_afdata, sizeof(ifp->if_afdata)); 1016 for (dp = domains; dp; dp = dp->dom_next) { 1017 if (dp->dom_ifattach) 1018 ifp->if_afdata[dp->dom_family] = 1019 (*dp->dom_ifattach)(ifp); 1020 } 1021 } 1022 1023 /* 1024 * Remove any unicast or broadcast network addresses from an interface. 1025 */ 1026 void 1027 if_purgeaddrs(struct ifnet *ifp) 1028 { 1029 struct ifaddr *ifa; 1030 1031 while (1) { 1032 struct epoch_tracker et; 1033 1034 NET_EPOCH_ENTER(et); 1035 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1036 if (ifa->ifa_addr->sa_family != AF_LINK) 1037 break; 1038 } 1039 NET_EPOCH_EXIT(et); 1040 1041 if (ifa == NULL) 1042 break; 1043 #ifdef INET 1044 /* XXX: Ugly!! ad hoc just for INET */ 1045 if (ifa->ifa_addr->sa_family == AF_INET) { 1046 struct ifaliasreq ifr; 1047 1048 bzero(&ifr, sizeof(ifr)); 1049 ifr.ifra_addr = *ifa->ifa_addr; 1050 if (ifa->ifa_dstaddr) 1051 ifr.ifra_broadaddr = *ifa->ifa_dstaddr; 1052 if (in_control(NULL, SIOCDIFADDR, (caddr_t)&ifr, ifp, 1053 NULL) == 0) 1054 continue; 1055 } 1056 #endif /* INET */ 1057 #ifdef INET6 1058 if (ifa->ifa_addr->sa_family == AF_INET6) { 1059 in6_purgeifaddr((struct in6_ifaddr *)ifa); 1060 /* ifp_addrhead is already updated */ 1061 continue; 1062 } 1063 #endif /* INET6 */ 1064 IF_ADDR_WLOCK(ifp); 1065 CK_STAILQ_REMOVE(&ifp->if_addrhead, ifa, ifaddr, ifa_link); 1066 IF_ADDR_WUNLOCK(ifp); 1067 ifa_free(ifa); 1068 } 1069 } 1070 1071 /* 1072 * Remove any multicast network addresses from an interface when an ifnet 1073 * is going away. 1074 */ 1075 static void 1076 if_purgemaddrs(struct ifnet *ifp) 1077 { 1078 struct ifmultiaddr *ifma; 1079 1080 IF_ADDR_WLOCK(ifp); 1081 while (!CK_STAILQ_EMPTY(&ifp->if_multiaddrs)) { 1082 ifma = CK_STAILQ_FIRST(&ifp->if_multiaddrs); 1083 CK_STAILQ_REMOVE(&ifp->if_multiaddrs, ifma, ifmultiaddr, ifma_link); 1084 if_delmulti_locked(ifp, ifma, 1); 1085 } 1086 IF_ADDR_WUNLOCK(ifp); 1087 } 1088 1089 /* 1090 * Detach an interface, removing it from the list of "active" interfaces. 1091 * If vmove flag is set on entry to if_detach_internal(), perform only a 1092 * limited subset of cleanup tasks, given that we are moving an ifnet from 1093 * one vnet to another, where it must be fully operational. 1094 * 1095 * XXXRW: There are some significant questions about event ordering, and 1096 * how to prevent things from starting to use the interface during detach. 1097 */ 1098 void 1099 if_detach(struct ifnet *ifp) 1100 { 1101 bool found; 1102 1103 CURVNET_SET_QUIET(ifp->if_vnet); 1104 found = if_unlink_ifnet(ifp, false); 1105 if (found) { 1106 sx_xlock(&ifnet_detach_sxlock); 1107 if_detach_internal(ifp, false); 1108 sx_xunlock(&ifnet_detach_sxlock); 1109 } 1110 CURVNET_RESTORE(); 1111 } 1112 1113 /* 1114 * The vmove flag, if set, indicates that we are called from a callpath 1115 * that is moving an interface to a different vnet instance. 1116 * 1117 * The shutdown flag, if set, indicates that we are called in the 1118 * process of shutting down a vnet instance. Currently only the 1119 * vnet_if_return SYSUNINIT function sets it. Note: we can be called 1120 * on a vnet instance shutdown without this flag being set, e.g., when 1121 * the cloned interfaces are destoyed as first thing of teardown. 1122 */ 1123 static int 1124 if_detach_internal(struct ifnet *ifp, bool vmove) 1125 { 1126 struct ifaddr *ifa; 1127 int i; 1128 struct domain *dp; 1129 #ifdef VIMAGE 1130 bool shutdown; 1131 1132 shutdown = VNET_IS_SHUTTING_DOWN(ifp->if_vnet); 1133 #endif 1134 1135 /* 1136 * At this point we know the interface still was on the ifnet list 1137 * and we removed it so we are in a stable state. 1138 */ 1139 epoch_wait_preempt(net_epoch_preempt); 1140 1141 /* 1142 * Ensure all pending EPOCH(9) callbacks have been executed. This 1143 * fixes issues about late destruction of multicast options 1144 * which lead to leave group calls, which in turn access the 1145 * belonging ifnet structure: 1146 */ 1147 epoch_drain_callbacks(net_epoch_preempt); 1148 1149 /* 1150 * In any case (destroy or vmove) detach us from the groups 1151 * and remove/wait for pending events on the taskq. 1152 * XXX-BZ in theory an interface could still enqueue a taskq change? 1153 */ 1154 if_delgroups(ifp); 1155 1156 taskqueue_drain(taskqueue_swi, &ifp->if_linktask); 1157 taskqueue_drain(taskqueue_swi, &ifp->if_addmultitask); 1158 1159 if_down(ifp); 1160 1161 #ifdef VIMAGE 1162 /* 1163 * On VNET shutdown abort here as the stack teardown will do all 1164 * the work top-down for us. 1165 */ 1166 if (shutdown) { 1167 /* Give interface users the chance to clean up. */ 1168 EVENTHANDLER_INVOKE(ifnet_departure_event, ifp); 1169 1170 /* 1171 * In case of a vmove we are done here without error. 1172 * If we would signal an error it would lead to the same 1173 * abort as if we did not find the ifnet anymore. 1174 * if_detach() calls us in void context and does not care 1175 * about an early abort notification, so life is splendid :) 1176 */ 1177 goto finish_vnet_shutdown; 1178 } 1179 #endif 1180 1181 /* 1182 * At this point we are not tearing down a VNET and are either 1183 * going to destroy or vmove the interface and have to cleanup 1184 * accordingly. 1185 */ 1186 1187 /* 1188 * Remove routes and flush queues. 1189 */ 1190 #ifdef ALTQ 1191 if (ALTQ_IS_ENABLED(&ifp->if_snd)) 1192 altq_disable(&ifp->if_snd); 1193 if (ALTQ_IS_ATTACHED(&ifp->if_snd)) 1194 altq_detach(&ifp->if_snd); 1195 #endif 1196 1197 if_purgeaddrs(ifp); 1198 1199 #ifdef INET 1200 in_ifdetach(ifp); 1201 #endif 1202 1203 #ifdef INET6 1204 /* 1205 * Remove all IPv6 kernel structs related to ifp. This should be done 1206 * before removing routing entries below, since IPv6 interface direct 1207 * routes are expected to be removed by the IPv6-specific kernel API. 1208 * Otherwise, the kernel will detect some inconsistency and bark it. 1209 */ 1210 in6_ifdetach(ifp); 1211 #endif 1212 if_purgemaddrs(ifp); 1213 1214 /* Announce that the interface is gone. */ 1215 rt_ifannouncemsg(ifp, IFAN_DEPARTURE); 1216 EVENTHANDLER_INVOKE(ifnet_departure_event, ifp); 1217 if (IS_DEFAULT_VNET(curvnet)) 1218 devctl_notify("IFNET", ifp->if_xname, "DETACH", NULL); 1219 1220 if (!vmove) { 1221 /* 1222 * Prevent further calls into the device driver via ifnet. 1223 */ 1224 if_dead(ifp); 1225 1226 /* 1227 * Clean up all addresses. 1228 */ 1229 IF_ADDR_WLOCK(ifp); 1230 if (!CK_STAILQ_EMPTY(&ifp->if_addrhead)) { 1231 ifa = CK_STAILQ_FIRST(&ifp->if_addrhead); 1232 CK_STAILQ_REMOVE(&ifp->if_addrhead, ifa, ifaddr, ifa_link); 1233 IF_ADDR_WUNLOCK(ifp); 1234 ifa_free(ifa); 1235 } else 1236 IF_ADDR_WUNLOCK(ifp); 1237 } 1238 1239 rt_flushifroutes(ifp); 1240 1241 #ifdef VIMAGE 1242 finish_vnet_shutdown: 1243 #endif 1244 /* 1245 * We cannot hold the lock over dom_ifdetach calls as they might 1246 * sleep, for example trying to drain a callout, thus open up the 1247 * theoretical race with re-attaching. 1248 */ 1249 IF_AFDATA_LOCK(ifp); 1250 i = ifp->if_afdata_initialized; 1251 ifp->if_afdata_initialized = 0; 1252 IF_AFDATA_UNLOCK(ifp); 1253 for (dp = domains; i > 0 && dp; dp = dp->dom_next) { 1254 if (dp->dom_ifdetach && ifp->if_afdata[dp->dom_family]) { 1255 (*dp->dom_ifdetach)(ifp, 1256 ifp->if_afdata[dp->dom_family]); 1257 ifp->if_afdata[dp->dom_family] = NULL; 1258 } 1259 } 1260 1261 return (0); 1262 } 1263 1264 #ifdef VIMAGE 1265 /* 1266 * if_vmove() performs a limited version of if_detach() in current 1267 * vnet and if_attach()es the ifnet to the vnet specified as 2nd arg. 1268 */ 1269 static int 1270 if_vmove(struct ifnet *ifp, struct vnet *new_vnet) 1271 { 1272 #ifdef DEV_BPF 1273 u_int bif_dlt, bif_hdrlen; 1274 #endif 1275 int rc; 1276 1277 #ifdef DEV_BPF 1278 /* 1279 * if_detach_internal() will call the eventhandler to notify 1280 * interface departure. That will detach if_bpf. We need to 1281 * safe the dlt and hdrlen so we can re-attach it later. 1282 */ 1283 bpf_get_bp_params(ifp->if_bpf, &bif_dlt, &bif_hdrlen); 1284 #endif 1285 1286 /* 1287 * Detach from current vnet, but preserve LLADDR info, do not 1288 * mark as dead etc. so that the ifnet can be reattached later. 1289 * If we cannot find it, we lost the race to someone else. 1290 */ 1291 rc = if_detach_internal(ifp, true); 1292 if (rc != 0) 1293 return (rc); 1294 1295 /* 1296 * Perform interface-specific reassignment tasks, if provided by 1297 * the driver. 1298 */ 1299 if (ifp->if_reassign != NULL) 1300 ifp->if_reassign(ifp, new_vnet, NULL); 1301 1302 /* 1303 * Switch to the context of the target vnet. 1304 */ 1305 CURVNET_SET_QUIET(new_vnet); 1306 if_attach_internal(ifp, true); 1307 1308 #ifdef DEV_BPF 1309 if (ifp->if_bpf == NULL) 1310 bpfattach(ifp, bif_dlt, bif_hdrlen); 1311 #endif 1312 1313 CURVNET_RESTORE(); 1314 return (0); 1315 } 1316 1317 /* 1318 * Move an ifnet to or from another child prison/vnet, specified by the jail id. 1319 */ 1320 static int 1321 if_vmove_loan(struct thread *td, struct ifnet *ifp, char *ifname, int jid) 1322 { 1323 struct prison *pr; 1324 struct ifnet *difp; 1325 int error; 1326 bool found __diagused; 1327 bool shutdown; 1328 1329 /* Try to find the prison within our visibility. */ 1330 sx_slock(&allprison_lock); 1331 pr = prison_find_child(td->td_ucred->cr_prison, jid); 1332 sx_sunlock(&allprison_lock); 1333 if (pr == NULL) 1334 return (ENXIO); 1335 prison_hold_locked(pr); 1336 mtx_unlock(&pr->pr_mtx); 1337 1338 /* Do not try to move the iface from and to the same prison. */ 1339 if (pr->pr_vnet == ifp->if_vnet) { 1340 prison_free(pr); 1341 return (EEXIST); 1342 } 1343 1344 /* Make sure the named iface does not exists in the dst. prison/vnet. */ 1345 /* XXX Lock interfaces to avoid races. */ 1346 CURVNET_SET_QUIET(pr->pr_vnet); 1347 difp = ifunit(ifname); 1348 if (difp != NULL) { 1349 CURVNET_RESTORE(); 1350 prison_free(pr); 1351 return (EEXIST); 1352 } 1353 1354 /* Make sure the VNET is stable. */ 1355 shutdown = VNET_IS_SHUTTING_DOWN(ifp->if_vnet); 1356 if (shutdown) { 1357 CURVNET_RESTORE(); 1358 prison_free(pr); 1359 return (EBUSY); 1360 } 1361 CURVNET_RESTORE(); 1362 1363 found = if_unlink_ifnet(ifp, true); 1364 MPASS(found); 1365 1366 /* Move the interface into the child jail/vnet. */ 1367 error = if_vmove(ifp, pr->pr_vnet); 1368 1369 /* Report the new if_xname back to the userland on success. */ 1370 if (error == 0) 1371 sprintf(ifname, "%s", ifp->if_xname); 1372 1373 prison_free(pr); 1374 return (error); 1375 } 1376 1377 static int 1378 if_vmove_reclaim(struct thread *td, char *ifname, int jid) 1379 { 1380 struct prison *pr; 1381 struct vnet *vnet_dst; 1382 struct ifnet *ifp; 1383 int error, found __diagused; 1384 bool shutdown; 1385 1386 /* Try to find the prison within our visibility. */ 1387 sx_slock(&allprison_lock); 1388 pr = prison_find_child(td->td_ucred->cr_prison, jid); 1389 sx_sunlock(&allprison_lock); 1390 if (pr == NULL) 1391 return (ENXIO); 1392 prison_hold_locked(pr); 1393 mtx_unlock(&pr->pr_mtx); 1394 1395 /* Make sure the named iface exists in the source prison/vnet. */ 1396 CURVNET_SET(pr->pr_vnet); 1397 ifp = ifunit(ifname); /* XXX Lock to avoid races. */ 1398 if (ifp == NULL) { 1399 CURVNET_RESTORE(); 1400 prison_free(pr); 1401 return (ENXIO); 1402 } 1403 1404 /* Do not try to move the iface from and to the same prison. */ 1405 vnet_dst = TD_TO_VNET(td); 1406 if (vnet_dst == ifp->if_vnet) { 1407 CURVNET_RESTORE(); 1408 prison_free(pr); 1409 return (EEXIST); 1410 } 1411 1412 /* Make sure the VNET is stable. */ 1413 shutdown = VNET_IS_SHUTTING_DOWN(ifp->if_vnet); 1414 if (shutdown) { 1415 CURVNET_RESTORE(); 1416 prison_free(pr); 1417 return (EBUSY); 1418 } 1419 1420 /* Get interface back from child jail/vnet. */ 1421 found = if_unlink_ifnet(ifp, true); 1422 MPASS(found); 1423 error = if_vmove(ifp, vnet_dst); 1424 CURVNET_RESTORE(); 1425 1426 /* Report the new if_xname back to the userland on success. */ 1427 if (error == 0) 1428 sprintf(ifname, "%s", ifp->if_xname); 1429 1430 prison_free(pr); 1431 return (error); 1432 } 1433 #endif /* VIMAGE */ 1434 1435 /* 1436 * Add a group to an interface 1437 */ 1438 int 1439 if_addgroup(struct ifnet *ifp, const char *groupname) 1440 { 1441 struct ifg_list *ifgl; 1442 struct ifg_group *ifg = NULL; 1443 struct ifg_member *ifgm; 1444 int new = 0; 1445 1446 if (groupname[0] && groupname[strlen(groupname) - 1] >= '0' && 1447 groupname[strlen(groupname) - 1] <= '9') 1448 return (EINVAL); 1449 1450 IFNET_WLOCK(); 1451 CK_STAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next) 1452 if (!strcmp(ifgl->ifgl_group->ifg_group, groupname)) { 1453 IFNET_WUNLOCK(); 1454 return (EEXIST); 1455 } 1456 1457 if ((ifgl = malloc(sizeof(*ifgl), M_TEMP, M_NOWAIT)) == NULL) { 1458 IFNET_WUNLOCK(); 1459 return (ENOMEM); 1460 } 1461 1462 if ((ifgm = malloc(sizeof(*ifgm), M_TEMP, M_NOWAIT)) == NULL) { 1463 free(ifgl, M_TEMP); 1464 IFNET_WUNLOCK(); 1465 return (ENOMEM); 1466 } 1467 1468 CK_STAILQ_FOREACH(ifg, &V_ifg_head, ifg_next) 1469 if (!strcmp(ifg->ifg_group, groupname)) 1470 break; 1471 1472 if (ifg == NULL) { 1473 if ((ifg = malloc(sizeof(*ifg), M_TEMP, M_NOWAIT)) == NULL) { 1474 free(ifgl, M_TEMP); 1475 free(ifgm, M_TEMP); 1476 IFNET_WUNLOCK(); 1477 return (ENOMEM); 1478 } 1479 strlcpy(ifg->ifg_group, groupname, sizeof(ifg->ifg_group)); 1480 ifg->ifg_refcnt = 0; 1481 CK_STAILQ_INIT(&ifg->ifg_members); 1482 CK_STAILQ_INSERT_TAIL(&V_ifg_head, ifg, ifg_next); 1483 new = 1; 1484 } 1485 1486 ifg->ifg_refcnt++; 1487 ifgl->ifgl_group = ifg; 1488 ifgm->ifgm_ifp = ifp; 1489 1490 IF_ADDR_WLOCK(ifp); 1491 CK_STAILQ_INSERT_TAIL(&ifg->ifg_members, ifgm, ifgm_next); 1492 CK_STAILQ_INSERT_TAIL(&ifp->if_groups, ifgl, ifgl_next); 1493 IF_ADDR_WUNLOCK(ifp); 1494 1495 IFNET_WUNLOCK(); 1496 1497 if (new) 1498 EVENTHANDLER_INVOKE(group_attach_event, ifg); 1499 EVENTHANDLER_INVOKE(group_change_event, groupname); 1500 1501 return (0); 1502 } 1503 1504 /* 1505 * Helper function to remove a group out of an interface. Expects the global 1506 * ifnet lock to be write-locked, and drops it before returning. 1507 */ 1508 static void 1509 _if_delgroup_locked(struct ifnet *ifp, struct ifg_list *ifgl, 1510 const char *groupname) 1511 { 1512 struct ifg_member *ifgm; 1513 bool freeifgl; 1514 1515 IFNET_WLOCK_ASSERT(); 1516 1517 IF_ADDR_WLOCK(ifp); 1518 CK_STAILQ_REMOVE(&ifp->if_groups, ifgl, ifg_list, ifgl_next); 1519 IF_ADDR_WUNLOCK(ifp); 1520 1521 CK_STAILQ_FOREACH(ifgm, &ifgl->ifgl_group->ifg_members, ifgm_next) { 1522 if (ifgm->ifgm_ifp == ifp) { 1523 CK_STAILQ_REMOVE(&ifgl->ifgl_group->ifg_members, ifgm, 1524 ifg_member, ifgm_next); 1525 break; 1526 } 1527 } 1528 1529 if (--ifgl->ifgl_group->ifg_refcnt == 0) { 1530 CK_STAILQ_REMOVE(&V_ifg_head, ifgl->ifgl_group, ifg_group, 1531 ifg_next); 1532 freeifgl = true; 1533 } else { 1534 freeifgl = false; 1535 } 1536 IFNET_WUNLOCK(); 1537 1538 epoch_wait_preempt(net_epoch_preempt); 1539 if (freeifgl) { 1540 EVENTHANDLER_INVOKE(group_detach_event, ifgl->ifgl_group); 1541 free(ifgl->ifgl_group, M_TEMP); 1542 } 1543 free(ifgm, M_TEMP); 1544 free(ifgl, M_TEMP); 1545 1546 EVENTHANDLER_INVOKE(group_change_event, groupname); 1547 } 1548 1549 /* 1550 * Remove a group from an interface 1551 */ 1552 int 1553 if_delgroup(struct ifnet *ifp, const char *groupname) 1554 { 1555 struct ifg_list *ifgl; 1556 1557 IFNET_WLOCK(); 1558 CK_STAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next) 1559 if (strcmp(ifgl->ifgl_group->ifg_group, groupname) == 0) 1560 break; 1561 if (ifgl == NULL) { 1562 IFNET_WUNLOCK(); 1563 return (ENOENT); 1564 } 1565 1566 _if_delgroup_locked(ifp, ifgl, groupname); 1567 1568 return (0); 1569 } 1570 1571 /* 1572 * Remove an interface from all groups 1573 */ 1574 static void 1575 if_delgroups(struct ifnet *ifp) 1576 { 1577 struct ifg_list *ifgl; 1578 char groupname[IFNAMSIZ]; 1579 1580 IFNET_WLOCK(); 1581 while ((ifgl = CK_STAILQ_FIRST(&ifp->if_groups)) != NULL) { 1582 strlcpy(groupname, ifgl->ifgl_group->ifg_group, IFNAMSIZ); 1583 _if_delgroup_locked(ifp, ifgl, groupname); 1584 IFNET_WLOCK(); 1585 } 1586 IFNET_WUNLOCK(); 1587 } 1588 1589 /* 1590 * Stores all groups from an interface in memory pointed to by ifgr. 1591 */ 1592 static int 1593 if_getgroup(struct ifgroupreq *ifgr, struct ifnet *ifp) 1594 { 1595 int len, error; 1596 struct ifg_list *ifgl; 1597 struct ifg_req ifgrq, *ifgp; 1598 1599 NET_EPOCH_ASSERT(); 1600 1601 if (ifgr->ifgr_len == 0) { 1602 CK_STAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next) 1603 ifgr->ifgr_len += sizeof(struct ifg_req); 1604 return (0); 1605 } 1606 1607 len = ifgr->ifgr_len; 1608 ifgp = ifgr->ifgr_groups; 1609 /* XXX: wire */ 1610 CK_STAILQ_FOREACH(ifgl, &ifp->if_groups, ifgl_next) { 1611 if (len < sizeof(ifgrq)) 1612 return (EINVAL); 1613 bzero(&ifgrq, sizeof ifgrq); 1614 strlcpy(ifgrq.ifgrq_group, ifgl->ifgl_group->ifg_group, 1615 sizeof(ifgrq.ifgrq_group)); 1616 if ((error = copyout(&ifgrq, ifgp, sizeof(struct ifg_req)))) 1617 return (error); 1618 len -= sizeof(ifgrq); 1619 ifgp++; 1620 } 1621 1622 return (0); 1623 } 1624 1625 /* 1626 * Stores all members of a group in memory pointed to by igfr 1627 */ 1628 static int 1629 if_getgroupmembers(struct ifgroupreq *ifgr) 1630 { 1631 struct ifg_group *ifg; 1632 struct ifg_member *ifgm; 1633 struct ifg_req ifgrq, *ifgp; 1634 int len, error; 1635 1636 IFNET_RLOCK(); 1637 CK_STAILQ_FOREACH(ifg, &V_ifg_head, ifg_next) 1638 if (strcmp(ifg->ifg_group, ifgr->ifgr_name) == 0) 1639 break; 1640 if (ifg == NULL) { 1641 IFNET_RUNLOCK(); 1642 return (ENOENT); 1643 } 1644 1645 if (ifgr->ifgr_len == 0) { 1646 CK_STAILQ_FOREACH(ifgm, &ifg->ifg_members, ifgm_next) 1647 ifgr->ifgr_len += sizeof(ifgrq); 1648 IFNET_RUNLOCK(); 1649 return (0); 1650 } 1651 1652 len = ifgr->ifgr_len; 1653 ifgp = ifgr->ifgr_groups; 1654 CK_STAILQ_FOREACH(ifgm, &ifg->ifg_members, ifgm_next) { 1655 if (len < sizeof(ifgrq)) { 1656 IFNET_RUNLOCK(); 1657 return (EINVAL); 1658 } 1659 bzero(&ifgrq, sizeof ifgrq); 1660 strlcpy(ifgrq.ifgrq_member, ifgm->ifgm_ifp->if_xname, 1661 sizeof(ifgrq.ifgrq_member)); 1662 if ((error = copyout(&ifgrq, ifgp, sizeof(struct ifg_req)))) { 1663 IFNET_RUNLOCK(); 1664 return (error); 1665 } 1666 len -= sizeof(ifgrq); 1667 ifgp++; 1668 } 1669 IFNET_RUNLOCK(); 1670 1671 return (0); 1672 } 1673 1674 /* 1675 * Return counter values from counter(9)s stored in ifnet. 1676 */ 1677 uint64_t 1678 if_get_counter_default(struct ifnet *ifp, ift_counter cnt) 1679 { 1680 1681 KASSERT(cnt < IFCOUNTERS, ("%s: invalid cnt %d", __func__, cnt)); 1682 1683 return (counter_u64_fetch(ifp->if_counters[cnt])); 1684 } 1685 1686 /* 1687 * Increase an ifnet counter. Usually used for counters shared 1688 * between the stack and a driver, but function supports them all. 1689 */ 1690 void 1691 if_inc_counter(struct ifnet *ifp, ift_counter cnt, int64_t inc) 1692 { 1693 1694 KASSERT(cnt < IFCOUNTERS, ("%s: invalid cnt %d", __func__, cnt)); 1695 1696 counter_u64_add(ifp->if_counters[cnt], inc); 1697 } 1698 1699 /* 1700 * Copy data from ifnet to userland API structure if_data. 1701 */ 1702 void 1703 if_data_copy(struct ifnet *ifp, struct if_data *ifd) 1704 { 1705 1706 ifd->ifi_type = ifp->if_type; 1707 ifd->ifi_physical = 0; 1708 ifd->ifi_addrlen = ifp->if_addrlen; 1709 ifd->ifi_hdrlen = ifp->if_hdrlen; 1710 ifd->ifi_link_state = ifp->if_link_state; 1711 ifd->ifi_vhid = 0; 1712 ifd->ifi_datalen = sizeof(struct if_data); 1713 ifd->ifi_mtu = ifp->if_mtu; 1714 ifd->ifi_metric = ifp->if_metric; 1715 ifd->ifi_baudrate = ifp->if_baudrate; 1716 ifd->ifi_hwassist = ifp->if_hwassist; 1717 ifd->ifi_epoch = ifp->if_epoch; 1718 ifd->ifi_lastchange = ifp->if_lastchange; 1719 1720 ifd->ifi_ipackets = ifp->if_get_counter(ifp, IFCOUNTER_IPACKETS); 1721 ifd->ifi_ierrors = ifp->if_get_counter(ifp, IFCOUNTER_IERRORS); 1722 ifd->ifi_opackets = ifp->if_get_counter(ifp, IFCOUNTER_OPACKETS); 1723 ifd->ifi_oerrors = ifp->if_get_counter(ifp, IFCOUNTER_OERRORS); 1724 ifd->ifi_collisions = ifp->if_get_counter(ifp, IFCOUNTER_COLLISIONS); 1725 ifd->ifi_ibytes = ifp->if_get_counter(ifp, IFCOUNTER_IBYTES); 1726 ifd->ifi_obytes = ifp->if_get_counter(ifp, IFCOUNTER_OBYTES); 1727 ifd->ifi_imcasts = ifp->if_get_counter(ifp, IFCOUNTER_IMCASTS); 1728 ifd->ifi_omcasts = ifp->if_get_counter(ifp, IFCOUNTER_OMCASTS); 1729 ifd->ifi_iqdrops = ifp->if_get_counter(ifp, IFCOUNTER_IQDROPS); 1730 ifd->ifi_oqdrops = ifp->if_get_counter(ifp, IFCOUNTER_OQDROPS); 1731 ifd->ifi_noproto = ifp->if_get_counter(ifp, IFCOUNTER_NOPROTO); 1732 } 1733 1734 /* 1735 * Initialization, destruction and refcounting functions for ifaddrs. 1736 */ 1737 struct ifaddr * 1738 ifa_alloc(size_t size, int flags) 1739 { 1740 struct ifaddr *ifa; 1741 1742 KASSERT(size >= sizeof(struct ifaddr), 1743 ("%s: invalid size %zu", __func__, size)); 1744 1745 ifa = malloc(size, M_IFADDR, M_ZERO | flags); 1746 if (ifa == NULL) 1747 return (NULL); 1748 1749 if ((ifa->ifa_opackets = counter_u64_alloc(flags)) == NULL) 1750 goto fail; 1751 if ((ifa->ifa_ipackets = counter_u64_alloc(flags)) == NULL) 1752 goto fail; 1753 if ((ifa->ifa_obytes = counter_u64_alloc(flags)) == NULL) 1754 goto fail; 1755 if ((ifa->ifa_ibytes = counter_u64_alloc(flags)) == NULL) 1756 goto fail; 1757 1758 refcount_init(&ifa->ifa_refcnt, 1); 1759 1760 return (ifa); 1761 1762 fail: 1763 /* free(NULL) is okay */ 1764 counter_u64_free(ifa->ifa_opackets); 1765 counter_u64_free(ifa->ifa_ipackets); 1766 counter_u64_free(ifa->ifa_obytes); 1767 counter_u64_free(ifa->ifa_ibytes); 1768 free(ifa, M_IFADDR); 1769 1770 return (NULL); 1771 } 1772 1773 void 1774 ifa_ref(struct ifaddr *ifa) 1775 { 1776 u_int old __diagused; 1777 1778 old = refcount_acquire(&ifa->ifa_refcnt); 1779 KASSERT(old > 0, ("%s: ifa %p has 0 refs", __func__, ifa)); 1780 } 1781 1782 int 1783 ifa_try_ref(struct ifaddr *ifa) 1784 { 1785 1786 NET_EPOCH_ASSERT(); 1787 return (refcount_acquire_if_not_zero(&ifa->ifa_refcnt)); 1788 } 1789 1790 static void 1791 ifa_destroy(epoch_context_t ctx) 1792 { 1793 struct ifaddr *ifa; 1794 1795 ifa = __containerof(ctx, struct ifaddr, ifa_epoch_ctx); 1796 counter_u64_free(ifa->ifa_opackets); 1797 counter_u64_free(ifa->ifa_ipackets); 1798 counter_u64_free(ifa->ifa_obytes); 1799 counter_u64_free(ifa->ifa_ibytes); 1800 free(ifa, M_IFADDR); 1801 } 1802 1803 void 1804 ifa_free(struct ifaddr *ifa) 1805 { 1806 1807 if (refcount_release(&ifa->ifa_refcnt)) 1808 NET_EPOCH_CALL(ifa_destroy, &ifa->ifa_epoch_ctx); 1809 } 1810 1811 /* 1812 * XXX: Because sockaddr_dl has deeper structure than the sockaddr 1813 * structs used to represent other address families, it is necessary 1814 * to perform a different comparison. 1815 */ 1816 1817 #define sa_dl_equal(a1, a2) \ 1818 ((((const struct sockaddr_dl *)(a1))->sdl_len == \ 1819 ((const struct sockaddr_dl *)(a2))->sdl_len) && \ 1820 (bcmp(CLLADDR((const struct sockaddr_dl *)(a1)), \ 1821 CLLADDR((const struct sockaddr_dl *)(a2)), \ 1822 ((const struct sockaddr_dl *)(a1))->sdl_alen) == 0)) 1823 1824 /* 1825 * Locate an interface based on a complete address. 1826 */ 1827 /*ARGSUSED*/ 1828 struct ifaddr * 1829 ifa_ifwithaddr(const struct sockaddr *addr) 1830 { 1831 struct ifnet *ifp; 1832 struct ifaddr *ifa; 1833 1834 NET_EPOCH_ASSERT(); 1835 1836 CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) { 1837 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1838 if (ifa->ifa_addr->sa_family != addr->sa_family) 1839 continue; 1840 if (sa_equal(addr, ifa->ifa_addr)) { 1841 goto done; 1842 } 1843 /* IP6 doesn't have broadcast */ 1844 if ((ifp->if_flags & IFF_BROADCAST) && 1845 ifa->ifa_broadaddr && 1846 ifa->ifa_broadaddr->sa_len != 0 && 1847 sa_equal(ifa->ifa_broadaddr, addr)) { 1848 goto done; 1849 } 1850 } 1851 } 1852 ifa = NULL; 1853 done: 1854 return (ifa); 1855 } 1856 1857 int 1858 ifa_ifwithaddr_check(const struct sockaddr *addr) 1859 { 1860 struct epoch_tracker et; 1861 int rc; 1862 1863 NET_EPOCH_ENTER(et); 1864 rc = (ifa_ifwithaddr(addr) != NULL); 1865 NET_EPOCH_EXIT(et); 1866 return (rc); 1867 } 1868 1869 /* 1870 * Locate an interface based on the broadcast address. 1871 */ 1872 /* ARGSUSED */ 1873 struct ifaddr * 1874 ifa_ifwithbroadaddr(const struct sockaddr *addr, int fibnum) 1875 { 1876 struct ifnet *ifp; 1877 struct ifaddr *ifa; 1878 1879 NET_EPOCH_ASSERT(); 1880 CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) { 1881 if ((fibnum != RT_ALL_FIBS) && (ifp->if_fib != fibnum)) 1882 continue; 1883 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1884 if (ifa->ifa_addr->sa_family != addr->sa_family) 1885 continue; 1886 if ((ifp->if_flags & IFF_BROADCAST) && 1887 ifa->ifa_broadaddr && 1888 ifa->ifa_broadaddr->sa_len != 0 && 1889 sa_equal(ifa->ifa_broadaddr, addr)) { 1890 goto done; 1891 } 1892 } 1893 } 1894 ifa = NULL; 1895 done: 1896 return (ifa); 1897 } 1898 1899 /* 1900 * Locate the point to point interface with a given destination address. 1901 */ 1902 /*ARGSUSED*/ 1903 struct ifaddr * 1904 ifa_ifwithdstaddr(const struct sockaddr *addr, int fibnum) 1905 { 1906 struct ifnet *ifp; 1907 struct ifaddr *ifa; 1908 1909 NET_EPOCH_ASSERT(); 1910 CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) { 1911 if ((ifp->if_flags & IFF_POINTOPOINT) == 0) 1912 continue; 1913 if ((fibnum != RT_ALL_FIBS) && (ifp->if_fib != fibnum)) 1914 continue; 1915 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1916 if (ifa->ifa_addr->sa_family != addr->sa_family) 1917 continue; 1918 if (ifa->ifa_dstaddr != NULL && 1919 sa_equal(addr, ifa->ifa_dstaddr)) { 1920 goto done; 1921 } 1922 } 1923 } 1924 ifa = NULL; 1925 done: 1926 return (ifa); 1927 } 1928 1929 /* 1930 * Find an interface on a specific network. If many, choice 1931 * is most specific found. 1932 */ 1933 struct ifaddr * 1934 ifa_ifwithnet(const struct sockaddr *addr, int ignore_ptp, int fibnum) 1935 { 1936 struct ifnet *ifp; 1937 struct ifaddr *ifa; 1938 struct ifaddr *ifa_maybe = NULL; 1939 u_int af = addr->sa_family; 1940 const char *addr_data = addr->sa_data, *cplim; 1941 1942 NET_EPOCH_ASSERT(); 1943 /* 1944 * AF_LINK addresses can be looked up directly by their index number, 1945 * so do that if we can. 1946 */ 1947 if (af == AF_LINK) { 1948 ifp = ifnet_byindex( 1949 ((const struct sockaddr_dl *)addr)->sdl_index); 1950 return (ifp ? ifp->if_addr : NULL); 1951 } 1952 1953 /* 1954 * Scan though each interface, looking for ones that have addresses 1955 * in this address family and the requested fib. 1956 */ 1957 CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) { 1958 if ((fibnum != RT_ALL_FIBS) && (ifp->if_fib != fibnum)) 1959 continue; 1960 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 1961 const char *cp, *cp2, *cp3; 1962 1963 if (ifa->ifa_addr->sa_family != af) 1964 next: continue; 1965 if (af == AF_INET && 1966 ifp->if_flags & IFF_POINTOPOINT && !ignore_ptp) { 1967 /* 1968 * This is a bit broken as it doesn't 1969 * take into account that the remote end may 1970 * be a single node in the network we are 1971 * looking for. 1972 * The trouble is that we don't know the 1973 * netmask for the remote end. 1974 */ 1975 if (ifa->ifa_dstaddr != NULL && 1976 sa_equal(addr, ifa->ifa_dstaddr)) { 1977 goto done; 1978 } 1979 } else { 1980 /* 1981 * Scan all the bits in the ifa's address. 1982 * If a bit dissagrees with what we are 1983 * looking for, mask it with the netmask 1984 * to see if it really matters. 1985 * (A byte at a time) 1986 */ 1987 if (ifa->ifa_netmask == 0) 1988 continue; 1989 cp = addr_data; 1990 cp2 = ifa->ifa_addr->sa_data; 1991 cp3 = ifa->ifa_netmask->sa_data; 1992 cplim = ifa->ifa_netmask->sa_len 1993 + (char *)ifa->ifa_netmask; 1994 while (cp3 < cplim) 1995 if ((*cp++ ^ *cp2++) & *cp3++) 1996 goto next; /* next address! */ 1997 /* 1998 * If the netmask of what we just found 1999 * is more specific than what we had before 2000 * (if we had one), or if the virtual status 2001 * of new prefix is better than of the old one, 2002 * then remember the new one before continuing 2003 * to search for an even better one. 2004 */ 2005 if (ifa_maybe == NULL || 2006 ifa_preferred(ifa_maybe, ifa) || 2007 rn_refines((caddr_t)ifa->ifa_netmask, 2008 (caddr_t)ifa_maybe->ifa_netmask)) { 2009 ifa_maybe = ifa; 2010 } 2011 } 2012 } 2013 } 2014 ifa = ifa_maybe; 2015 ifa_maybe = NULL; 2016 done: 2017 return (ifa); 2018 } 2019 2020 /* 2021 * Find an interface address specific to an interface best matching 2022 * a given address. 2023 */ 2024 struct ifaddr * 2025 ifaof_ifpforaddr(const struct sockaddr *addr, struct ifnet *ifp) 2026 { 2027 struct ifaddr *ifa; 2028 const char *cp, *cp2, *cp3; 2029 char *cplim; 2030 struct ifaddr *ifa_maybe = NULL; 2031 u_int af = addr->sa_family; 2032 2033 if (af >= AF_MAX) 2034 return (NULL); 2035 2036 NET_EPOCH_ASSERT(); 2037 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 2038 if (ifa->ifa_addr->sa_family != af) 2039 continue; 2040 if (ifa_maybe == NULL) 2041 ifa_maybe = ifa; 2042 if (ifa->ifa_netmask == 0) { 2043 if (sa_equal(addr, ifa->ifa_addr) || 2044 (ifa->ifa_dstaddr && 2045 sa_equal(addr, ifa->ifa_dstaddr))) 2046 goto done; 2047 continue; 2048 } 2049 if (ifp->if_flags & IFF_POINTOPOINT) { 2050 if (sa_equal(addr, ifa->ifa_dstaddr)) 2051 goto done; 2052 } else { 2053 cp = addr->sa_data; 2054 cp2 = ifa->ifa_addr->sa_data; 2055 cp3 = ifa->ifa_netmask->sa_data; 2056 cplim = ifa->ifa_netmask->sa_len + (char *)ifa->ifa_netmask; 2057 for (; cp3 < cplim; cp3++) 2058 if ((*cp++ ^ *cp2++) & *cp3) 2059 break; 2060 if (cp3 == cplim) 2061 goto done; 2062 } 2063 } 2064 ifa = ifa_maybe; 2065 done: 2066 return (ifa); 2067 } 2068 2069 /* 2070 * See whether new ifa is better than current one: 2071 * 1) A non-virtual one is preferred over virtual. 2072 * 2) A virtual in master state preferred over any other state. 2073 * 2074 * Used in several address selecting functions. 2075 */ 2076 int 2077 ifa_preferred(struct ifaddr *cur, struct ifaddr *next) 2078 { 2079 2080 return (cur->ifa_carp && (!next->ifa_carp || 2081 ((*carp_master_p)(next) && !(*carp_master_p)(cur)))); 2082 } 2083 2084 struct sockaddr_dl * 2085 link_alloc_sdl(size_t size, int flags) 2086 { 2087 2088 return (malloc(size, M_TEMP, flags)); 2089 } 2090 2091 void 2092 link_free_sdl(struct sockaddr *sa) 2093 { 2094 free(sa, M_TEMP); 2095 } 2096 2097 /* 2098 * Fills in given sdl with interface basic info. 2099 * Returns pointer to filled sdl. 2100 */ 2101 struct sockaddr_dl * 2102 link_init_sdl(struct ifnet *ifp, struct sockaddr *paddr, u_char iftype) 2103 { 2104 struct sockaddr_dl *sdl; 2105 2106 sdl = (struct sockaddr_dl *)paddr; 2107 memset(sdl, 0, sizeof(struct sockaddr_dl)); 2108 sdl->sdl_len = sizeof(struct sockaddr_dl); 2109 sdl->sdl_family = AF_LINK; 2110 sdl->sdl_index = ifp->if_index; 2111 sdl->sdl_type = iftype; 2112 2113 return (sdl); 2114 } 2115 2116 /* 2117 * Mark an interface down and notify protocols of 2118 * the transition. 2119 */ 2120 static void 2121 if_unroute(struct ifnet *ifp, int flag, int fam) 2122 { 2123 struct ifaddr *ifa; 2124 struct epoch_tracker et; 2125 2126 KASSERT(flag == IFF_UP, ("if_unroute: flag != IFF_UP")); 2127 2128 ifp->if_flags &= ~flag; 2129 getmicrotime(&ifp->if_lastchange); 2130 NET_EPOCH_ENTER(et); 2131 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) 2132 if (fam == PF_UNSPEC || (fam == ifa->ifa_addr->sa_family)) 2133 pfctlinput(PRC_IFDOWN, ifa->ifa_addr); 2134 NET_EPOCH_EXIT(et); 2135 ifp->if_qflush(ifp); 2136 2137 if (ifp->if_carp) 2138 (*carp_linkstate_p)(ifp); 2139 rt_ifmsg(ifp); 2140 } 2141 2142 /* 2143 * Mark an interface up and notify protocols of 2144 * the transition. 2145 */ 2146 static void 2147 if_route(struct ifnet *ifp, int flag, int fam) 2148 { 2149 struct ifaddr *ifa; 2150 struct epoch_tracker et; 2151 2152 KASSERT(flag == IFF_UP, ("if_route: flag != IFF_UP")); 2153 2154 ifp->if_flags |= flag; 2155 getmicrotime(&ifp->if_lastchange); 2156 NET_EPOCH_ENTER(et); 2157 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) 2158 if (fam == PF_UNSPEC || (fam == ifa->ifa_addr->sa_family)) 2159 pfctlinput(PRC_IFUP, ifa->ifa_addr); 2160 NET_EPOCH_EXIT(et); 2161 if (ifp->if_carp) 2162 (*carp_linkstate_p)(ifp); 2163 rt_ifmsg(ifp); 2164 #ifdef INET6 2165 in6_if_up(ifp); 2166 #endif 2167 } 2168 2169 void (*vlan_link_state_p)(struct ifnet *); /* XXX: private from if_vlan */ 2170 void (*vlan_trunk_cap_p)(struct ifnet *); /* XXX: private from if_vlan */ 2171 struct ifnet *(*vlan_trunkdev_p)(struct ifnet *); 2172 struct ifnet *(*vlan_devat_p)(struct ifnet *, uint16_t); 2173 int (*vlan_tag_p)(struct ifnet *, uint16_t *); 2174 int (*vlan_pcp_p)(struct ifnet *, uint16_t *); 2175 int (*vlan_setcookie_p)(struct ifnet *, void *); 2176 void *(*vlan_cookie_p)(struct ifnet *); 2177 2178 /* 2179 * Handle a change in the interface link state. To avoid LORs 2180 * between driver lock and upper layer locks, as well as possible 2181 * recursions, we post event to taskqueue, and all job 2182 * is done in static do_link_state_change(). 2183 */ 2184 void 2185 if_link_state_change(struct ifnet *ifp, int link_state) 2186 { 2187 /* Return if state hasn't changed. */ 2188 if (ifp->if_link_state == link_state) 2189 return; 2190 2191 ifp->if_link_state = link_state; 2192 2193 /* XXXGL: reference ifp? */ 2194 taskqueue_enqueue(taskqueue_swi, &ifp->if_linktask); 2195 } 2196 2197 static void 2198 do_link_state_change(void *arg, int pending) 2199 { 2200 struct ifnet *ifp; 2201 int link_state; 2202 2203 ifp = arg; 2204 link_state = ifp->if_link_state; 2205 2206 CURVNET_SET(ifp->if_vnet); 2207 rt_ifmsg(ifp); 2208 if (ifp->if_vlantrunk != NULL) 2209 (*vlan_link_state_p)(ifp); 2210 2211 if ((ifp->if_type == IFT_ETHER || ifp->if_type == IFT_L2VLAN) && 2212 ifp->if_l2com != NULL) 2213 (*ng_ether_link_state_p)(ifp, link_state); 2214 if (ifp->if_carp) 2215 (*carp_linkstate_p)(ifp); 2216 if (ifp->if_bridge) 2217 ifp->if_bridge_linkstate(ifp); 2218 if (ifp->if_lagg) 2219 (*lagg_linkstate_p)(ifp, link_state); 2220 2221 if (IS_DEFAULT_VNET(curvnet)) 2222 devctl_notify("IFNET", ifp->if_xname, 2223 (link_state == LINK_STATE_UP) ? "LINK_UP" : "LINK_DOWN", 2224 NULL); 2225 if (pending > 1) 2226 if_printf(ifp, "%d link states coalesced\n", pending); 2227 if (log_link_state_change) 2228 if_printf(ifp, "link state changed to %s\n", 2229 (link_state == LINK_STATE_UP) ? "UP" : "DOWN" ); 2230 EVENTHANDLER_INVOKE(ifnet_link_event, ifp, link_state); 2231 CURVNET_RESTORE(); 2232 } 2233 2234 /* 2235 * Mark an interface down and notify protocols of 2236 * the transition. 2237 */ 2238 void 2239 if_down(struct ifnet *ifp) 2240 { 2241 2242 EVENTHANDLER_INVOKE(ifnet_event, ifp, IFNET_EVENT_DOWN); 2243 if_unroute(ifp, IFF_UP, AF_UNSPEC); 2244 } 2245 2246 /* 2247 * Mark an interface up and notify protocols of 2248 * the transition. 2249 */ 2250 void 2251 if_up(struct ifnet *ifp) 2252 { 2253 2254 if_route(ifp, IFF_UP, AF_UNSPEC); 2255 EVENTHANDLER_INVOKE(ifnet_event, ifp, IFNET_EVENT_UP); 2256 } 2257 2258 /* 2259 * Flush an interface queue. 2260 */ 2261 void 2262 if_qflush(struct ifnet *ifp) 2263 { 2264 struct mbuf *m, *n; 2265 struct ifaltq *ifq; 2266 2267 ifq = &ifp->if_snd; 2268 IFQ_LOCK(ifq); 2269 #ifdef ALTQ 2270 if (ALTQ_IS_ENABLED(ifq)) 2271 ALTQ_PURGE(ifq); 2272 #endif 2273 n = ifq->ifq_head; 2274 while ((m = n) != NULL) { 2275 n = m->m_nextpkt; 2276 m_freem(m); 2277 } 2278 ifq->ifq_head = 0; 2279 ifq->ifq_tail = 0; 2280 ifq->ifq_len = 0; 2281 IFQ_UNLOCK(ifq); 2282 } 2283 2284 /* 2285 * Map interface name to interface structure pointer, with or without 2286 * returning a reference. 2287 */ 2288 struct ifnet * 2289 ifunit_ref(const char *name) 2290 { 2291 struct epoch_tracker et; 2292 struct ifnet *ifp; 2293 2294 NET_EPOCH_ENTER(et); 2295 CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) { 2296 if (strncmp(name, ifp->if_xname, IFNAMSIZ) == 0 && 2297 !(ifp->if_flags & IFF_DYING)) 2298 break; 2299 } 2300 if (ifp != NULL) 2301 if_ref(ifp); 2302 NET_EPOCH_EXIT(et); 2303 return (ifp); 2304 } 2305 2306 struct ifnet * 2307 ifunit(const char *name) 2308 { 2309 struct epoch_tracker et; 2310 struct ifnet *ifp; 2311 2312 NET_EPOCH_ENTER(et); 2313 CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) { 2314 if (strncmp(name, ifp->if_xname, IFNAMSIZ) == 0) 2315 break; 2316 } 2317 NET_EPOCH_EXIT(et); 2318 return (ifp); 2319 } 2320 2321 void * 2322 ifr_buffer_get_buffer(void *data) 2323 { 2324 union ifreq_union *ifrup; 2325 2326 ifrup = data; 2327 #ifdef COMPAT_FREEBSD32 2328 if (SV_CURPROC_FLAG(SV_ILP32)) 2329 return ((void *)(uintptr_t) 2330 ifrup->ifr32.ifr_ifru.ifru_buffer.buffer); 2331 #endif 2332 return (ifrup->ifr.ifr_ifru.ifru_buffer.buffer); 2333 } 2334 2335 static void 2336 ifr_buffer_set_buffer_null(void *data) 2337 { 2338 union ifreq_union *ifrup; 2339 2340 ifrup = data; 2341 #ifdef COMPAT_FREEBSD32 2342 if (SV_CURPROC_FLAG(SV_ILP32)) 2343 ifrup->ifr32.ifr_ifru.ifru_buffer.buffer = 0; 2344 else 2345 #endif 2346 ifrup->ifr.ifr_ifru.ifru_buffer.buffer = NULL; 2347 } 2348 2349 size_t 2350 ifr_buffer_get_length(void *data) 2351 { 2352 union ifreq_union *ifrup; 2353 2354 ifrup = data; 2355 #ifdef COMPAT_FREEBSD32 2356 if (SV_CURPROC_FLAG(SV_ILP32)) 2357 return (ifrup->ifr32.ifr_ifru.ifru_buffer.length); 2358 #endif 2359 return (ifrup->ifr.ifr_ifru.ifru_buffer.length); 2360 } 2361 2362 static void 2363 ifr_buffer_set_length(void *data, size_t len) 2364 { 2365 union ifreq_union *ifrup; 2366 2367 ifrup = data; 2368 #ifdef COMPAT_FREEBSD32 2369 if (SV_CURPROC_FLAG(SV_ILP32)) 2370 ifrup->ifr32.ifr_ifru.ifru_buffer.length = len; 2371 else 2372 #endif 2373 ifrup->ifr.ifr_ifru.ifru_buffer.length = len; 2374 } 2375 2376 void * 2377 ifr_data_get_ptr(void *ifrp) 2378 { 2379 union ifreq_union *ifrup; 2380 2381 ifrup = ifrp; 2382 #ifdef COMPAT_FREEBSD32 2383 if (SV_CURPROC_FLAG(SV_ILP32)) 2384 return ((void *)(uintptr_t) 2385 ifrup->ifr32.ifr_ifru.ifru_data); 2386 #endif 2387 return (ifrup->ifr.ifr_ifru.ifru_data); 2388 } 2389 2390 /* 2391 * Hardware specific interface ioctls. 2392 */ 2393 int 2394 ifhwioctl(u_long cmd, struct ifnet *ifp, caddr_t data, struct thread *td) 2395 { 2396 struct ifreq *ifr; 2397 int error = 0, do_ifup = 0; 2398 int new_flags, temp_flags; 2399 size_t namelen, onamelen; 2400 size_t descrlen; 2401 char *descrbuf, *odescrbuf; 2402 char new_name[IFNAMSIZ]; 2403 char old_name[IFNAMSIZ], strbuf[IFNAMSIZ + 8]; 2404 struct ifaddr *ifa; 2405 struct sockaddr_dl *sdl; 2406 2407 ifr = (struct ifreq *)data; 2408 switch (cmd) { 2409 case SIOCGIFINDEX: 2410 ifr->ifr_index = ifp->if_index; 2411 break; 2412 2413 case SIOCGIFFLAGS: 2414 temp_flags = ifp->if_flags | ifp->if_drv_flags; 2415 ifr->ifr_flags = temp_flags & 0xffff; 2416 ifr->ifr_flagshigh = temp_flags >> 16; 2417 break; 2418 2419 case SIOCGIFCAP: 2420 ifr->ifr_reqcap = ifp->if_capabilities; 2421 ifr->ifr_curcap = ifp->if_capenable; 2422 break; 2423 2424 case SIOCGIFDATA: 2425 { 2426 struct if_data ifd; 2427 2428 /* Ensure uninitialised padding is not leaked. */ 2429 memset(&ifd, 0, sizeof(ifd)); 2430 2431 if_data_copy(ifp, &ifd); 2432 error = copyout(&ifd, ifr_data_get_ptr(ifr), sizeof(ifd)); 2433 break; 2434 } 2435 2436 #ifdef MAC 2437 case SIOCGIFMAC: 2438 error = mac_ifnet_ioctl_get(td->td_ucred, ifr, ifp); 2439 break; 2440 #endif 2441 2442 case SIOCGIFMETRIC: 2443 ifr->ifr_metric = ifp->if_metric; 2444 break; 2445 2446 case SIOCGIFMTU: 2447 ifr->ifr_mtu = ifp->if_mtu; 2448 break; 2449 2450 case SIOCGIFPHYS: 2451 /* XXXGL: did this ever worked? */ 2452 ifr->ifr_phys = 0; 2453 break; 2454 2455 case SIOCGIFDESCR: 2456 error = 0; 2457 sx_slock(&ifdescr_sx); 2458 if (ifp->if_description == NULL) 2459 error = ENOMSG; 2460 else { 2461 /* space for terminating nul */ 2462 descrlen = strlen(ifp->if_description) + 1; 2463 if (ifr_buffer_get_length(ifr) < descrlen) 2464 ifr_buffer_set_buffer_null(ifr); 2465 else 2466 error = copyout(ifp->if_description, 2467 ifr_buffer_get_buffer(ifr), descrlen); 2468 ifr_buffer_set_length(ifr, descrlen); 2469 } 2470 sx_sunlock(&ifdescr_sx); 2471 break; 2472 2473 case SIOCSIFDESCR: 2474 error = priv_check(td, PRIV_NET_SETIFDESCR); 2475 if (error) 2476 return (error); 2477 2478 /* 2479 * Copy only (length-1) bytes to make sure that 2480 * if_description is always nul terminated. The 2481 * length parameter is supposed to count the 2482 * terminating nul in. 2483 */ 2484 if (ifr_buffer_get_length(ifr) > ifdescr_maxlen) 2485 return (ENAMETOOLONG); 2486 else if (ifr_buffer_get_length(ifr) == 0) 2487 descrbuf = NULL; 2488 else { 2489 descrbuf = malloc(ifr_buffer_get_length(ifr), 2490 M_IFDESCR, M_WAITOK | M_ZERO); 2491 error = copyin(ifr_buffer_get_buffer(ifr), descrbuf, 2492 ifr_buffer_get_length(ifr) - 1); 2493 if (error) { 2494 free(descrbuf, M_IFDESCR); 2495 break; 2496 } 2497 } 2498 2499 sx_xlock(&ifdescr_sx); 2500 odescrbuf = ifp->if_description; 2501 ifp->if_description = descrbuf; 2502 sx_xunlock(&ifdescr_sx); 2503 2504 getmicrotime(&ifp->if_lastchange); 2505 free(odescrbuf, M_IFDESCR); 2506 break; 2507 2508 case SIOCGIFFIB: 2509 ifr->ifr_fib = ifp->if_fib; 2510 break; 2511 2512 case SIOCSIFFIB: 2513 error = priv_check(td, PRIV_NET_SETIFFIB); 2514 if (error) 2515 return (error); 2516 if (ifr->ifr_fib >= rt_numfibs) 2517 return (EINVAL); 2518 2519 ifp->if_fib = ifr->ifr_fib; 2520 break; 2521 2522 case SIOCSIFFLAGS: 2523 error = priv_check(td, PRIV_NET_SETIFFLAGS); 2524 if (error) 2525 return (error); 2526 /* 2527 * Currently, no driver owned flags pass the IFF_CANTCHANGE 2528 * check, so we don't need special handling here yet. 2529 */ 2530 new_flags = (ifr->ifr_flags & 0xffff) | 2531 (ifr->ifr_flagshigh << 16); 2532 if (ifp->if_flags & IFF_UP && 2533 (new_flags & IFF_UP) == 0) { 2534 if_down(ifp); 2535 } else if (new_flags & IFF_UP && 2536 (ifp->if_flags & IFF_UP) == 0) { 2537 do_ifup = 1; 2538 } 2539 /* See if permanently promiscuous mode bit is about to flip */ 2540 if ((ifp->if_flags ^ new_flags) & IFF_PPROMISC) { 2541 if (new_flags & IFF_PPROMISC) 2542 ifp->if_flags |= IFF_PROMISC; 2543 else if (ifp->if_pcount == 0) 2544 ifp->if_flags &= ~IFF_PROMISC; 2545 if (log_promisc_mode_change) 2546 if_printf(ifp, "permanently promiscuous mode %s\n", 2547 ((new_flags & IFF_PPROMISC) ? 2548 "enabled" : "disabled")); 2549 } 2550 ifp->if_flags = (ifp->if_flags & IFF_CANTCHANGE) | 2551 (new_flags &~ IFF_CANTCHANGE); 2552 if (ifp->if_ioctl) { 2553 (void) (*ifp->if_ioctl)(ifp, cmd, data); 2554 } 2555 if (do_ifup) 2556 if_up(ifp); 2557 getmicrotime(&ifp->if_lastchange); 2558 break; 2559 2560 case SIOCSIFCAP: 2561 error = priv_check(td, PRIV_NET_SETIFCAP); 2562 if (error) 2563 return (error); 2564 if (ifp->if_ioctl == NULL) 2565 return (EOPNOTSUPP); 2566 if (ifr->ifr_reqcap & ~ifp->if_capabilities) 2567 return (EINVAL); 2568 error = (*ifp->if_ioctl)(ifp, cmd, data); 2569 if (error == 0) 2570 getmicrotime(&ifp->if_lastchange); 2571 break; 2572 2573 #ifdef MAC 2574 case SIOCSIFMAC: 2575 error = mac_ifnet_ioctl_set(td->td_ucred, ifr, ifp); 2576 break; 2577 #endif 2578 2579 case SIOCSIFNAME: 2580 error = priv_check(td, PRIV_NET_SETIFNAME); 2581 if (error) 2582 return (error); 2583 error = copyinstr(ifr_data_get_ptr(ifr), new_name, IFNAMSIZ, 2584 NULL); 2585 if (error != 0) 2586 return (error); 2587 if (new_name[0] == '\0') 2588 return (EINVAL); 2589 if (strcmp(new_name, ifp->if_xname) == 0) 2590 break; 2591 if (ifunit(new_name) != NULL) 2592 return (EEXIST); 2593 2594 /* 2595 * XXX: Locking. Nothing else seems to lock if_flags, 2596 * and there are numerous other races with the 2597 * ifunit() checks not being atomic with namespace 2598 * changes (renames, vmoves, if_attach, etc). 2599 */ 2600 ifp->if_flags |= IFF_RENAMING; 2601 2602 /* Announce the departure of the interface. */ 2603 rt_ifannouncemsg(ifp, IFAN_DEPARTURE); 2604 EVENTHANDLER_INVOKE(ifnet_departure_event, ifp); 2605 2606 if_printf(ifp, "changing name to '%s'\n", new_name); 2607 2608 IF_ADDR_WLOCK(ifp); 2609 strlcpy(old_name, ifp->if_xname, sizeof(old_name)); 2610 strlcpy(ifp->if_xname, new_name, sizeof(ifp->if_xname)); 2611 ifa = ifp->if_addr; 2612 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 2613 namelen = strlen(new_name); 2614 onamelen = sdl->sdl_nlen; 2615 /* 2616 * Move the address if needed. This is safe because we 2617 * allocate space for a name of length IFNAMSIZ when we 2618 * create this in if_attach(). 2619 */ 2620 if (namelen != onamelen) { 2621 bcopy(sdl->sdl_data + onamelen, 2622 sdl->sdl_data + namelen, sdl->sdl_alen); 2623 } 2624 bcopy(new_name, sdl->sdl_data, namelen); 2625 sdl->sdl_nlen = namelen; 2626 sdl = (struct sockaddr_dl *)ifa->ifa_netmask; 2627 bzero(sdl->sdl_data, onamelen); 2628 while (namelen != 0) 2629 sdl->sdl_data[--namelen] = 0xff; 2630 IF_ADDR_WUNLOCK(ifp); 2631 2632 EVENTHANDLER_INVOKE(ifnet_arrival_event, ifp); 2633 /* Announce the return of the interface. */ 2634 rt_ifannouncemsg(ifp, IFAN_ARRIVAL); 2635 2636 ifp->if_flags &= ~IFF_RENAMING; 2637 2638 snprintf(strbuf, sizeof(strbuf), "name=%s", new_name); 2639 devctl_notify("IFNET", old_name, "RENAME", strbuf); 2640 break; 2641 2642 #ifdef VIMAGE 2643 case SIOCSIFVNET: 2644 error = priv_check(td, PRIV_NET_SETIFVNET); 2645 if (error) 2646 return (error); 2647 error = if_vmove_loan(td, ifp, ifr->ifr_name, ifr->ifr_jid); 2648 break; 2649 #endif 2650 2651 case SIOCSIFMETRIC: 2652 error = priv_check(td, PRIV_NET_SETIFMETRIC); 2653 if (error) 2654 return (error); 2655 ifp->if_metric = ifr->ifr_metric; 2656 getmicrotime(&ifp->if_lastchange); 2657 break; 2658 2659 case SIOCSIFPHYS: 2660 error = priv_check(td, PRIV_NET_SETIFPHYS); 2661 if (error) 2662 return (error); 2663 if (ifp->if_ioctl == NULL) 2664 return (EOPNOTSUPP); 2665 error = (*ifp->if_ioctl)(ifp, cmd, data); 2666 if (error == 0) 2667 getmicrotime(&ifp->if_lastchange); 2668 break; 2669 2670 case SIOCSIFMTU: 2671 { 2672 u_long oldmtu = ifp->if_mtu; 2673 2674 error = priv_check(td, PRIV_NET_SETIFMTU); 2675 if (error) 2676 return (error); 2677 if (ifr->ifr_mtu < IF_MINMTU || ifr->ifr_mtu > IF_MAXMTU) 2678 return (EINVAL); 2679 if (ifp->if_ioctl == NULL) 2680 return (EOPNOTSUPP); 2681 /* Disallow MTU changes on bridge member interfaces. */ 2682 if (ifp->if_bridge) 2683 return (EOPNOTSUPP); 2684 error = (*ifp->if_ioctl)(ifp, cmd, data); 2685 if (error == 0) { 2686 getmicrotime(&ifp->if_lastchange); 2687 rt_ifmsg(ifp); 2688 #ifdef INET 2689 DEBUGNET_NOTIFY_MTU(ifp); 2690 #endif 2691 } 2692 /* 2693 * If the link MTU changed, do network layer specific procedure. 2694 */ 2695 if (ifp->if_mtu != oldmtu) { 2696 #ifdef INET6 2697 nd6_setmtu(ifp); 2698 #endif 2699 rt_updatemtu(ifp); 2700 } 2701 break; 2702 } 2703 2704 case SIOCADDMULTI: 2705 case SIOCDELMULTI: 2706 if (cmd == SIOCADDMULTI) 2707 error = priv_check(td, PRIV_NET_ADDMULTI); 2708 else 2709 error = priv_check(td, PRIV_NET_DELMULTI); 2710 if (error) 2711 return (error); 2712 2713 /* Don't allow group membership on non-multicast interfaces. */ 2714 if ((ifp->if_flags & IFF_MULTICAST) == 0) 2715 return (EOPNOTSUPP); 2716 2717 /* Don't let users screw up protocols' entries. */ 2718 if (ifr->ifr_addr.sa_family != AF_LINK) 2719 return (EINVAL); 2720 2721 if (cmd == SIOCADDMULTI) { 2722 struct epoch_tracker et; 2723 struct ifmultiaddr *ifma; 2724 2725 /* 2726 * Userland is only permitted to join groups once 2727 * via the if_addmulti() KPI, because it cannot hold 2728 * struct ifmultiaddr * between calls. It may also 2729 * lose a race while we check if the membership 2730 * already exists. 2731 */ 2732 NET_EPOCH_ENTER(et); 2733 ifma = if_findmulti(ifp, &ifr->ifr_addr); 2734 NET_EPOCH_EXIT(et); 2735 if (ifma != NULL) 2736 error = EADDRINUSE; 2737 else 2738 error = if_addmulti(ifp, &ifr->ifr_addr, &ifma); 2739 } else { 2740 error = if_delmulti(ifp, &ifr->ifr_addr); 2741 } 2742 if (error == 0) 2743 getmicrotime(&ifp->if_lastchange); 2744 break; 2745 2746 case SIOCSIFPHYADDR: 2747 case SIOCDIFPHYADDR: 2748 #ifdef INET6 2749 case SIOCSIFPHYADDR_IN6: 2750 #endif 2751 case SIOCSIFMEDIA: 2752 case SIOCSIFGENERIC: 2753 error = priv_check(td, PRIV_NET_HWIOCTL); 2754 if (error) 2755 return (error); 2756 if (ifp->if_ioctl == NULL) 2757 return (EOPNOTSUPP); 2758 error = (*ifp->if_ioctl)(ifp, cmd, data); 2759 if (error == 0) 2760 getmicrotime(&ifp->if_lastchange); 2761 break; 2762 2763 case SIOCGIFSTATUS: 2764 case SIOCGIFPSRCADDR: 2765 case SIOCGIFPDSTADDR: 2766 case SIOCGIFMEDIA: 2767 case SIOCGIFXMEDIA: 2768 case SIOCGIFGENERIC: 2769 case SIOCGIFRSSKEY: 2770 case SIOCGIFRSSHASH: 2771 case SIOCGIFDOWNREASON: 2772 if (ifp->if_ioctl == NULL) 2773 return (EOPNOTSUPP); 2774 error = (*ifp->if_ioctl)(ifp, cmd, data); 2775 break; 2776 2777 case SIOCSIFLLADDR: 2778 error = priv_check(td, PRIV_NET_SETLLADDR); 2779 if (error) 2780 return (error); 2781 error = if_setlladdr(ifp, 2782 ifr->ifr_addr.sa_data, ifr->ifr_addr.sa_len); 2783 break; 2784 2785 case SIOCGHWADDR: 2786 error = if_gethwaddr(ifp, ifr); 2787 break; 2788 2789 case SIOCAIFGROUP: 2790 error = priv_check(td, PRIV_NET_ADDIFGROUP); 2791 if (error) 2792 return (error); 2793 error = if_addgroup(ifp, 2794 ((struct ifgroupreq *)data)->ifgr_group); 2795 if (error != 0) 2796 return (error); 2797 break; 2798 2799 case SIOCGIFGROUP: 2800 { 2801 struct epoch_tracker et; 2802 2803 NET_EPOCH_ENTER(et); 2804 error = if_getgroup((struct ifgroupreq *)data, ifp); 2805 NET_EPOCH_EXIT(et); 2806 break; 2807 } 2808 2809 case SIOCDIFGROUP: 2810 error = priv_check(td, PRIV_NET_DELIFGROUP); 2811 if (error) 2812 return (error); 2813 error = if_delgroup(ifp, 2814 ((struct ifgroupreq *)data)->ifgr_group); 2815 if (error != 0) 2816 return (error); 2817 break; 2818 2819 default: 2820 error = ENOIOCTL; 2821 break; 2822 } 2823 return (error); 2824 } 2825 2826 /* 2827 * Interface ioctls. 2828 */ 2829 int 2830 ifioctl(struct socket *so, u_long cmd, caddr_t data, struct thread *td) 2831 { 2832 #ifdef COMPAT_FREEBSD32 2833 union { 2834 struct ifconf ifc; 2835 struct ifdrv ifd; 2836 struct ifgroupreq ifgr; 2837 struct ifmediareq ifmr; 2838 } thunk; 2839 u_long saved_cmd; 2840 struct ifconf32 *ifc32; 2841 struct ifdrv32 *ifd32; 2842 struct ifgroupreq32 *ifgr32; 2843 struct ifmediareq32 *ifmr32; 2844 #endif 2845 struct ifnet *ifp; 2846 struct ifreq *ifr; 2847 int error; 2848 int oif_flags; 2849 #ifdef VIMAGE 2850 bool shutdown; 2851 #endif 2852 2853 CURVNET_SET(so->so_vnet); 2854 #ifdef VIMAGE 2855 /* Make sure the VNET is stable. */ 2856 shutdown = VNET_IS_SHUTTING_DOWN(so->so_vnet); 2857 if (shutdown) { 2858 CURVNET_RESTORE(); 2859 return (EBUSY); 2860 } 2861 #endif 2862 2863 #ifdef COMPAT_FREEBSD32 2864 saved_cmd = cmd; 2865 switch (cmd) { 2866 case SIOCGIFCONF32: 2867 ifc32 = (struct ifconf32 *)data; 2868 thunk.ifc.ifc_len = ifc32->ifc_len; 2869 thunk.ifc.ifc_buf = PTRIN(ifc32->ifc_buf); 2870 data = (caddr_t)&thunk.ifc; 2871 cmd = SIOCGIFCONF; 2872 break; 2873 case SIOCGDRVSPEC32: 2874 case SIOCSDRVSPEC32: 2875 ifd32 = (struct ifdrv32 *)data; 2876 memcpy(thunk.ifd.ifd_name, ifd32->ifd_name, 2877 sizeof(thunk.ifd.ifd_name)); 2878 thunk.ifd.ifd_cmd = ifd32->ifd_cmd; 2879 thunk.ifd.ifd_len = ifd32->ifd_len; 2880 thunk.ifd.ifd_data = PTRIN(ifd32->ifd_data); 2881 data = (caddr_t)&thunk.ifd; 2882 cmd = _IOC_NEWTYPE(cmd, struct ifdrv); 2883 break; 2884 case SIOCAIFGROUP32: 2885 case SIOCGIFGROUP32: 2886 case SIOCDIFGROUP32: 2887 case SIOCGIFGMEMB32: 2888 ifgr32 = (struct ifgroupreq32 *)data; 2889 memcpy(thunk.ifgr.ifgr_name, ifgr32->ifgr_name, 2890 sizeof(thunk.ifgr.ifgr_name)); 2891 thunk.ifgr.ifgr_len = ifgr32->ifgr_len; 2892 switch (cmd) { 2893 case SIOCAIFGROUP32: 2894 case SIOCDIFGROUP32: 2895 memcpy(thunk.ifgr.ifgr_group, ifgr32->ifgr_group, 2896 sizeof(thunk.ifgr.ifgr_group)); 2897 break; 2898 case SIOCGIFGROUP32: 2899 case SIOCGIFGMEMB32: 2900 thunk.ifgr.ifgr_groups = PTRIN(ifgr32->ifgr_groups); 2901 break; 2902 } 2903 data = (caddr_t)&thunk.ifgr; 2904 cmd = _IOC_NEWTYPE(cmd, struct ifgroupreq); 2905 break; 2906 case SIOCGIFMEDIA32: 2907 case SIOCGIFXMEDIA32: 2908 ifmr32 = (struct ifmediareq32 *)data; 2909 memcpy(thunk.ifmr.ifm_name, ifmr32->ifm_name, 2910 sizeof(thunk.ifmr.ifm_name)); 2911 thunk.ifmr.ifm_current = ifmr32->ifm_current; 2912 thunk.ifmr.ifm_mask = ifmr32->ifm_mask; 2913 thunk.ifmr.ifm_status = ifmr32->ifm_status; 2914 thunk.ifmr.ifm_active = ifmr32->ifm_active; 2915 thunk.ifmr.ifm_count = ifmr32->ifm_count; 2916 thunk.ifmr.ifm_ulist = PTRIN(ifmr32->ifm_ulist); 2917 data = (caddr_t)&thunk.ifmr; 2918 cmd = _IOC_NEWTYPE(cmd, struct ifmediareq); 2919 break; 2920 } 2921 #endif 2922 2923 switch (cmd) { 2924 case SIOCGIFCONF: 2925 error = ifconf(cmd, data); 2926 goto out_noref; 2927 } 2928 2929 ifr = (struct ifreq *)data; 2930 switch (cmd) { 2931 #ifdef VIMAGE 2932 case SIOCSIFRVNET: 2933 error = priv_check(td, PRIV_NET_SETIFVNET); 2934 if (error == 0) 2935 error = if_vmove_reclaim(td, ifr->ifr_name, 2936 ifr->ifr_jid); 2937 goto out_noref; 2938 #endif 2939 case SIOCIFCREATE: 2940 case SIOCIFCREATE2: 2941 error = priv_check(td, PRIV_NET_IFCREATE); 2942 if (error == 0) 2943 error = if_clone_create(ifr->ifr_name, 2944 sizeof(ifr->ifr_name), cmd == SIOCIFCREATE2 ? 2945 ifr_data_get_ptr(ifr) : NULL); 2946 goto out_noref; 2947 case SIOCIFDESTROY: 2948 error = priv_check(td, PRIV_NET_IFDESTROY); 2949 2950 if (error == 0) { 2951 sx_xlock(&ifnet_detach_sxlock); 2952 error = if_clone_destroy(ifr->ifr_name); 2953 sx_xunlock(&ifnet_detach_sxlock); 2954 } 2955 goto out_noref; 2956 2957 case SIOCIFGCLONERS: 2958 error = if_clone_list((struct if_clonereq *)data); 2959 goto out_noref; 2960 2961 case SIOCGIFGMEMB: 2962 error = if_getgroupmembers((struct ifgroupreq *)data); 2963 goto out_noref; 2964 2965 #if defined(INET) || defined(INET6) 2966 case SIOCSVH: 2967 case SIOCGVH: 2968 if (carp_ioctl_p == NULL) 2969 error = EPROTONOSUPPORT; 2970 else 2971 error = (*carp_ioctl_p)(ifr, cmd, td); 2972 goto out_noref; 2973 #endif 2974 } 2975 2976 ifp = ifunit_ref(ifr->ifr_name); 2977 if (ifp == NULL) { 2978 error = ENXIO; 2979 goto out_noref; 2980 } 2981 2982 error = ifhwioctl(cmd, ifp, data, td); 2983 if (error != ENOIOCTL) 2984 goto out_ref; 2985 2986 oif_flags = ifp->if_flags; 2987 if (so->so_proto == NULL) { 2988 error = EOPNOTSUPP; 2989 goto out_ref; 2990 } 2991 2992 /* 2993 * Pass the request on to the socket control method, and if the 2994 * latter returns EOPNOTSUPP, directly to the interface. 2995 * 2996 * Make an exception for the legacy SIOCSIF* requests. Drivers 2997 * trust SIOCSIFADDR et al to come from an already privileged 2998 * layer, and do not perform any credentials checks or input 2999 * validation. 3000 */ 3001 error = ((*so->so_proto->pr_usrreqs->pru_control)(so, cmd, data, 3002 ifp, td)); 3003 if (error == EOPNOTSUPP && ifp != NULL && ifp->if_ioctl != NULL && 3004 cmd != SIOCSIFADDR && cmd != SIOCSIFBRDADDR && 3005 cmd != SIOCSIFDSTADDR && cmd != SIOCSIFNETMASK) 3006 error = (*ifp->if_ioctl)(ifp, cmd, data); 3007 3008 if ((oif_flags ^ ifp->if_flags) & IFF_UP) { 3009 #ifdef INET6 3010 if (ifp->if_flags & IFF_UP) 3011 in6_if_up(ifp); 3012 #endif 3013 } 3014 3015 out_ref: 3016 if_rele(ifp); 3017 out_noref: 3018 CURVNET_RESTORE(); 3019 #ifdef COMPAT_FREEBSD32 3020 if (error != 0) 3021 return (error); 3022 switch (saved_cmd) { 3023 case SIOCGIFCONF32: 3024 ifc32->ifc_len = thunk.ifc.ifc_len; 3025 break; 3026 case SIOCGDRVSPEC32: 3027 /* 3028 * SIOCGDRVSPEC is IOWR, but nothing actually touches 3029 * the struct so just assert that ifd_len (the only 3030 * field it might make sense to update) hasn't 3031 * changed. 3032 */ 3033 KASSERT(thunk.ifd.ifd_len == ifd32->ifd_len, 3034 ("ifd_len was updated %u -> %zu", ifd32->ifd_len, 3035 thunk.ifd.ifd_len)); 3036 break; 3037 case SIOCGIFGROUP32: 3038 case SIOCGIFGMEMB32: 3039 ifgr32->ifgr_len = thunk.ifgr.ifgr_len; 3040 break; 3041 case SIOCGIFMEDIA32: 3042 case SIOCGIFXMEDIA32: 3043 ifmr32->ifm_current = thunk.ifmr.ifm_current; 3044 ifmr32->ifm_mask = thunk.ifmr.ifm_mask; 3045 ifmr32->ifm_status = thunk.ifmr.ifm_status; 3046 ifmr32->ifm_active = thunk.ifmr.ifm_active; 3047 ifmr32->ifm_count = thunk.ifmr.ifm_count; 3048 break; 3049 } 3050 #endif 3051 return (error); 3052 } 3053 3054 /* 3055 * The code common to handling reference counted flags, 3056 * e.g., in ifpromisc() and if_allmulti(). 3057 * The "pflag" argument can specify a permanent mode flag to check, 3058 * such as IFF_PPROMISC for promiscuous mode; should be 0 if none. 3059 * 3060 * Only to be used on stack-owned flags, not driver-owned flags. 3061 */ 3062 static int 3063 if_setflag(struct ifnet *ifp, int flag, int pflag, int *refcount, int onswitch) 3064 { 3065 struct ifreq ifr; 3066 int error; 3067 int oldflags, oldcount; 3068 3069 /* Sanity checks to catch programming errors */ 3070 KASSERT((flag & (IFF_DRV_OACTIVE|IFF_DRV_RUNNING)) == 0, 3071 ("%s: setting driver-owned flag %d", __func__, flag)); 3072 3073 if (onswitch) 3074 KASSERT(*refcount >= 0, 3075 ("%s: increment negative refcount %d for flag %d", 3076 __func__, *refcount, flag)); 3077 else 3078 KASSERT(*refcount > 0, 3079 ("%s: decrement non-positive refcount %d for flag %d", 3080 __func__, *refcount, flag)); 3081 3082 /* In case this mode is permanent, just touch refcount */ 3083 if (ifp->if_flags & pflag) { 3084 *refcount += onswitch ? 1 : -1; 3085 return (0); 3086 } 3087 3088 /* Save ifnet parameters for if_ioctl() may fail */ 3089 oldcount = *refcount; 3090 oldflags = ifp->if_flags; 3091 3092 /* 3093 * See if we aren't the only and touching refcount is enough. 3094 * Actually toggle interface flag if we are the first or last. 3095 */ 3096 if (onswitch) { 3097 if ((*refcount)++) 3098 return (0); 3099 ifp->if_flags |= flag; 3100 } else { 3101 if (--(*refcount)) 3102 return (0); 3103 ifp->if_flags &= ~flag; 3104 } 3105 3106 /* Call down the driver since we've changed interface flags */ 3107 if (ifp->if_ioctl == NULL) { 3108 error = EOPNOTSUPP; 3109 goto recover; 3110 } 3111 ifr.ifr_flags = ifp->if_flags & 0xffff; 3112 ifr.ifr_flagshigh = ifp->if_flags >> 16; 3113 error = (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr); 3114 if (error) 3115 goto recover; 3116 /* Notify userland that interface flags have changed */ 3117 rt_ifmsg(ifp); 3118 return (0); 3119 3120 recover: 3121 /* Recover after driver error */ 3122 *refcount = oldcount; 3123 ifp->if_flags = oldflags; 3124 return (error); 3125 } 3126 3127 /* 3128 * Set/clear promiscuous mode on interface ifp based on the truth value 3129 * of pswitch. The calls are reference counted so that only the first 3130 * "on" request actually has an effect, as does the final "off" request. 3131 * Results are undefined if the "off" and "on" requests are not matched. 3132 */ 3133 int 3134 ifpromisc(struct ifnet *ifp, int pswitch) 3135 { 3136 int error; 3137 int oldflags = ifp->if_flags; 3138 3139 error = if_setflag(ifp, IFF_PROMISC, IFF_PPROMISC, 3140 &ifp->if_pcount, pswitch); 3141 /* If promiscuous mode status has changed, log a message */ 3142 if (error == 0 && ((ifp->if_flags ^ oldflags) & IFF_PROMISC) && 3143 log_promisc_mode_change) 3144 if_printf(ifp, "promiscuous mode %s\n", 3145 (ifp->if_flags & IFF_PROMISC) ? "enabled" : "disabled"); 3146 return (error); 3147 } 3148 3149 /* 3150 * Return interface configuration 3151 * of system. List may be used 3152 * in later ioctl's (above) to get 3153 * other information. 3154 */ 3155 /*ARGSUSED*/ 3156 static int 3157 ifconf(u_long cmd, caddr_t data) 3158 { 3159 struct ifconf *ifc = (struct ifconf *)data; 3160 struct ifnet *ifp; 3161 struct ifaddr *ifa; 3162 struct ifreq ifr; 3163 struct sbuf *sb; 3164 int error, full = 0, valid_len, max_len; 3165 3166 /* Limit initial buffer size to maxphys to avoid DoS from userspace. */ 3167 max_len = maxphys - 1; 3168 3169 /* Prevent hostile input from being able to crash the system */ 3170 if (ifc->ifc_len <= 0) 3171 return (EINVAL); 3172 3173 again: 3174 if (ifc->ifc_len <= max_len) { 3175 max_len = ifc->ifc_len; 3176 full = 1; 3177 } 3178 sb = sbuf_new(NULL, NULL, max_len + 1, SBUF_FIXEDLEN); 3179 max_len = 0; 3180 valid_len = 0; 3181 3182 IFNET_RLOCK(); 3183 CK_STAILQ_FOREACH(ifp, &V_ifnet, if_link) { 3184 struct epoch_tracker et; 3185 int addrs; 3186 3187 /* 3188 * Zero the ifr to make sure we don't disclose the contents 3189 * of the stack. 3190 */ 3191 memset(&ifr, 0, sizeof(ifr)); 3192 3193 if (strlcpy(ifr.ifr_name, ifp->if_xname, sizeof(ifr.ifr_name)) 3194 >= sizeof(ifr.ifr_name)) { 3195 sbuf_delete(sb); 3196 IFNET_RUNLOCK(); 3197 return (ENAMETOOLONG); 3198 } 3199 3200 addrs = 0; 3201 NET_EPOCH_ENTER(et); 3202 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 3203 struct sockaddr *sa = ifa->ifa_addr; 3204 3205 if (prison_if(curthread->td_ucred, sa) != 0) 3206 continue; 3207 addrs++; 3208 if (sa->sa_len <= sizeof(*sa)) { 3209 if (sa->sa_len < sizeof(*sa)) { 3210 memset(&ifr.ifr_ifru.ifru_addr, 0, 3211 sizeof(ifr.ifr_ifru.ifru_addr)); 3212 memcpy(&ifr.ifr_ifru.ifru_addr, sa, 3213 sa->sa_len); 3214 } else 3215 ifr.ifr_ifru.ifru_addr = *sa; 3216 sbuf_bcat(sb, &ifr, sizeof(ifr)); 3217 max_len += sizeof(ifr); 3218 } else { 3219 sbuf_bcat(sb, &ifr, 3220 offsetof(struct ifreq, ifr_addr)); 3221 max_len += offsetof(struct ifreq, ifr_addr); 3222 sbuf_bcat(sb, sa, sa->sa_len); 3223 max_len += sa->sa_len; 3224 } 3225 3226 if (sbuf_error(sb) == 0) 3227 valid_len = sbuf_len(sb); 3228 } 3229 NET_EPOCH_EXIT(et); 3230 if (addrs == 0) { 3231 sbuf_bcat(sb, &ifr, sizeof(ifr)); 3232 max_len += sizeof(ifr); 3233 3234 if (sbuf_error(sb) == 0) 3235 valid_len = sbuf_len(sb); 3236 } 3237 } 3238 IFNET_RUNLOCK(); 3239 3240 /* 3241 * If we didn't allocate enough space (uncommon), try again. If 3242 * we have already allocated as much space as we are allowed, 3243 * return what we've got. 3244 */ 3245 if (valid_len != max_len && !full) { 3246 sbuf_delete(sb); 3247 goto again; 3248 } 3249 3250 ifc->ifc_len = valid_len; 3251 sbuf_finish(sb); 3252 error = copyout(sbuf_data(sb), ifc->ifc_req, ifc->ifc_len); 3253 sbuf_delete(sb); 3254 return (error); 3255 } 3256 3257 /* 3258 * Just like ifpromisc(), but for all-multicast-reception mode. 3259 */ 3260 int 3261 if_allmulti(struct ifnet *ifp, int onswitch) 3262 { 3263 3264 return (if_setflag(ifp, IFF_ALLMULTI, 0, &ifp->if_amcount, onswitch)); 3265 } 3266 3267 struct ifmultiaddr * 3268 if_findmulti(struct ifnet *ifp, const struct sockaddr *sa) 3269 { 3270 struct ifmultiaddr *ifma; 3271 3272 IF_ADDR_LOCK_ASSERT(ifp); 3273 3274 CK_STAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) { 3275 if (sa->sa_family == AF_LINK) { 3276 if (sa_dl_equal(ifma->ifma_addr, sa)) 3277 break; 3278 } else { 3279 if (sa_equal(ifma->ifma_addr, sa)) 3280 break; 3281 } 3282 } 3283 3284 return ifma; 3285 } 3286 3287 /* 3288 * Allocate a new ifmultiaddr and initialize based on passed arguments. We 3289 * make copies of passed sockaddrs. The ifmultiaddr will not be added to 3290 * the ifnet multicast address list here, so the caller must do that and 3291 * other setup work (such as notifying the device driver). The reference 3292 * count is initialized to 1. 3293 */ 3294 static struct ifmultiaddr * 3295 if_allocmulti(struct ifnet *ifp, struct sockaddr *sa, struct sockaddr *llsa, 3296 int mflags) 3297 { 3298 struct ifmultiaddr *ifma; 3299 struct sockaddr *dupsa; 3300 3301 ifma = malloc(sizeof *ifma, M_IFMADDR, mflags | 3302 M_ZERO); 3303 if (ifma == NULL) 3304 return (NULL); 3305 3306 dupsa = malloc(sa->sa_len, M_IFMADDR, mflags); 3307 if (dupsa == NULL) { 3308 free(ifma, M_IFMADDR); 3309 return (NULL); 3310 } 3311 bcopy(sa, dupsa, sa->sa_len); 3312 ifma->ifma_addr = dupsa; 3313 3314 ifma->ifma_ifp = ifp; 3315 ifma->ifma_refcount = 1; 3316 ifma->ifma_protospec = NULL; 3317 3318 if (llsa == NULL) { 3319 ifma->ifma_lladdr = NULL; 3320 return (ifma); 3321 } 3322 3323 dupsa = malloc(llsa->sa_len, M_IFMADDR, mflags); 3324 if (dupsa == NULL) { 3325 free(ifma->ifma_addr, M_IFMADDR); 3326 free(ifma, M_IFMADDR); 3327 return (NULL); 3328 } 3329 bcopy(llsa, dupsa, llsa->sa_len); 3330 ifma->ifma_lladdr = dupsa; 3331 3332 return (ifma); 3333 } 3334 3335 /* 3336 * if_freemulti: free ifmultiaddr structure and possibly attached related 3337 * addresses. The caller is responsible for implementing reference 3338 * counting, notifying the driver, handling routing messages, and releasing 3339 * any dependent link layer state. 3340 */ 3341 #ifdef MCAST_VERBOSE 3342 extern void kdb_backtrace(void); 3343 #endif 3344 static void 3345 if_freemulti_internal(struct ifmultiaddr *ifma) 3346 { 3347 3348 KASSERT(ifma->ifma_refcount == 0, ("if_freemulti: refcount %d", 3349 ifma->ifma_refcount)); 3350 3351 if (ifma->ifma_lladdr != NULL) 3352 free(ifma->ifma_lladdr, M_IFMADDR); 3353 #ifdef MCAST_VERBOSE 3354 kdb_backtrace(); 3355 printf("%s freeing ifma: %p\n", __func__, ifma); 3356 #endif 3357 free(ifma->ifma_addr, M_IFMADDR); 3358 free(ifma, M_IFMADDR); 3359 } 3360 3361 static void 3362 if_destroymulti(epoch_context_t ctx) 3363 { 3364 struct ifmultiaddr *ifma; 3365 3366 ifma = __containerof(ctx, struct ifmultiaddr, ifma_epoch_ctx); 3367 if_freemulti_internal(ifma); 3368 } 3369 3370 void 3371 if_freemulti(struct ifmultiaddr *ifma) 3372 { 3373 KASSERT(ifma->ifma_refcount == 0, ("if_freemulti_epoch: refcount %d", 3374 ifma->ifma_refcount)); 3375 3376 NET_EPOCH_CALL(if_destroymulti, &ifma->ifma_epoch_ctx); 3377 } 3378 3379 /* 3380 * Register an additional multicast address with a network interface. 3381 * 3382 * - If the address is already present, bump the reference count on the 3383 * address and return. 3384 * - If the address is not link-layer, look up a link layer address. 3385 * - Allocate address structures for one or both addresses, and attach to the 3386 * multicast address list on the interface. If automatically adding a link 3387 * layer address, the protocol address will own a reference to the link 3388 * layer address, to be freed when it is freed. 3389 * - Notify the network device driver of an addition to the multicast address 3390 * list. 3391 * 3392 * 'sa' points to caller-owned memory with the desired multicast address. 3393 * 3394 * 'retifma' will be used to return a pointer to the resulting multicast 3395 * address reference, if desired. 3396 */ 3397 int 3398 if_addmulti(struct ifnet *ifp, struct sockaddr *sa, 3399 struct ifmultiaddr **retifma) 3400 { 3401 struct ifmultiaddr *ifma, *ll_ifma; 3402 struct sockaddr *llsa; 3403 struct sockaddr_dl sdl; 3404 int error; 3405 3406 #ifdef INET 3407 IN_MULTI_LIST_UNLOCK_ASSERT(); 3408 #endif 3409 #ifdef INET6 3410 IN6_MULTI_LIST_UNLOCK_ASSERT(); 3411 #endif 3412 /* 3413 * If the address is already present, return a new reference to it; 3414 * otherwise, allocate storage and set up a new address. 3415 */ 3416 IF_ADDR_WLOCK(ifp); 3417 ifma = if_findmulti(ifp, sa); 3418 if (ifma != NULL) { 3419 ifma->ifma_refcount++; 3420 if (retifma != NULL) 3421 *retifma = ifma; 3422 IF_ADDR_WUNLOCK(ifp); 3423 return (0); 3424 } 3425 3426 /* 3427 * The address isn't already present; resolve the protocol address 3428 * into a link layer address, and then look that up, bump its 3429 * refcount or allocate an ifma for that also. 3430 * Most link layer resolving functions returns address data which 3431 * fits inside default sockaddr_dl structure. However callback 3432 * can allocate another sockaddr structure, in that case we need to 3433 * free it later. 3434 */ 3435 llsa = NULL; 3436 ll_ifma = NULL; 3437 if (ifp->if_resolvemulti != NULL) { 3438 /* Provide called function with buffer size information */ 3439 sdl.sdl_len = sizeof(sdl); 3440 llsa = (struct sockaddr *)&sdl; 3441 error = ifp->if_resolvemulti(ifp, &llsa, sa); 3442 if (error) 3443 goto unlock_out; 3444 } 3445 3446 /* 3447 * Allocate the new address. Don't hook it up yet, as we may also 3448 * need to allocate a link layer multicast address. 3449 */ 3450 ifma = if_allocmulti(ifp, sa, llsa, M_NOWAIT); 3451 if (ifma == NULL) { 3452 error = ENOMEM; 3453 goto free_llsa_out; 3454 } 3455 3456 /* 3457 * If a link layer address is found, we'll need to see if it's 3458 * already present in the address list, or allocate is as well. 3459 * When this block finishes, the link layer address will be on the 3460 * list. 3461 */ 3462 if (llsa != NULL) { 3463 ll_ifma = if_findmulti(ifp, llsa); 3464 if (ll_ifma == NULL) { 3465 ll_ifma = if_allocmulti(ifp, llsa, NULL, M_NOWAIT); 3466 if (ll_ifma == NULL) { 3467 --ifma->ifma_refcount; 3468 if_freemulti(ifma); 3469 error = ENOMEM; 3470 goto free_llsa_out; 3471 } 3472 ll_ifma->ifma_flags |= IFMA_F_ENQUEUED; 3473 CK_STAILQ_INSERT_HEAD(&ifp->if_multiaddrs, ll_ifma, 3474 ifma_link); 3475 } else 3476 ll_ifma->ifma_refcount++; 3477 ifma->ifma_llifma = ll_ifma; 3478 } 3479 3480 /* 3481 * We now have a new multicast address, ifma, and possibly a new or 3482 * referenced link layer address. Add the primary address to the 3483 * ifnet address list. 3484 */ 3485 ifma->ifma_flags |= IFMA_F_ENQUEUED; 3486 CK_STAILQ_INSERT_HEAD(&ifp->if_multiaddrs, ifma, ifma_link); 3487 3488 if (retifma != NULL) 3489 *retifma = ifma; 3490 3491 /* 3492 * Must generate the message while holding the lock so that 'ifma' 3493 * pointer is still valid. 3494 */ 3495 rt_newmaddrmsg(RTM_NEWMADDR, ifma); 3496 IF_ADDR_WUNLOCK(ifp); 3497 3498 /* 3499 * We are certain we have added something, so call down to the 3500 * interface to let them know about it. 3501 */ 3502 if (ifp->if_ioctl != NULL) { 3503 if (THREAD_CAN_SLEEP()) 3504 (void )(*ifp->if_ioctl)(ifp, SIOCADDMULTI, 0); 3505 else 3506 taskqueue_enqueue(taskqueue_swi, &ifp->if_addmultitask); 3507 } 3508 3509 if ((llsa != NULL) && (llsa != (struct sockaddr *)&sdl)) 3510 link_free_sdl(llsa); 3511 3512 return (0); 3513 3514 free_llsa_out: 3515 if ((llsa != NULL) && (llsa != (struct sockaddr *)&sdl)) 3516 link_free_sdl(llsa); 3517 3518 unlock_out: 3519 IF_ADDR_WUNLOCK(ifp); 3520 return (error); 3521 } 3522 3523 static void 3524 if_siocaddmulti(void *arg, int pending) 3525 { 3526 struct ifnet *ifp; 3527 3528 ifp = arg; 3529 #ifdef DIAGNOSTIC 3530 if (pending > 1) 3531 if_printf(ifp, "%d SIOCADDMULTI coalesced\n", pending); 3532 #endif 3533 CURVNET_SET(ifp->if_vnet); 3534 (void )(*ifp->if_ioctl)(ifp, SIOCADDMULTI, 0); 3535 CURVNET_RESTORE(); 3536 } 3537 3538 /* 3539 * Delete a multicast group membership by network-layer group address. 3540 * 3541 * Returns ENOENT if the entry could not be found. If ifp no longer 3542 * exists, results are undefined. This entry point should only be used 3543 * from subsystems which do appropriate locking to hold ifp for the 3544 * duration of the call. 3545 * Network-layer protocol domains must use if_delmulti_ifma(). 3546 */ 3547 int 3548 if_delmulti(struct ifnet *ifp, struct sockaddr *sa) 3549 { 3550 struct ifmultiaddr *ifma; 3551 int lastref; 3552 3553 KASSERT(ifp, ("%s: NULL ifp", __func__)); 3554 3555 IF_ADDR_WLOCK(ifp); 3556 lastref = 0; 3557 ifma = if_findmulti(ifp, sa); 3558 if (ifma != NULL) 3559 lastref = if_delmulti_locked(ifp, ifma, 0); 3560 IF_ADDR_WUNLOCK(ifp); 3561 3562 if (ifma == NULL) 3563 return (ENOENT); 3564 3565 if (lastref && ifp->if_ioctl != NULL) { 3566 (void)(*ifp->if_ioctl)(ifp, SIOCDELMULTI, 0); 3567 } 3568 3569 return (0); 3570 } 3571 3572 /* 3573 * Delete all multicast group membership for an interface. 3574 * Should be used to quickly flush all multicast filters. 3575 */ 3576 void 3577 if_delallmulti(struct ifnet *ifp) 3578 { 3579 struct ifmultiaddr *ifma; 3580 struct ifmultiaddr *next; 3581 3582 IF_ADDR_WLOCK(ifp); 3583 CK_STAILQ_FOREACH_SAFE(ifma, &ifp->if_multiaddrs, ifma_link, next) 3584 if_delmulti_locked(ifp, ifma, 0); 3585 IF_ADDR_WUNLOCK(ifp); 3586 } 3587 3588 void 3589 if_delmulti_ifma(struct ifmultiaddr *ifma) 3590 { 3591 if_delmulti_ifma_flags(ifma, 0); 3592 } 3593 3594 /* 3595 * Delete a multicast group membership by group membership pointer. 3596 * Network-layer protocol domains must use this routine. 3597 * 3598 * It is safe to call this routine if the ifp disappeared. 3599 */ 3600 void 3601 if_delmulti_ifma_flags(struct ifmultiaddr *ifma, int flags) 3602 { 3603 struct ifnet *ifp; 3604 int lastref; 3605 MCDPRINTF("%s freeing ifma: %p\n", __func__, ifma); 3606 #ifdef INET 3607 IN_MULTI_LIST_UNLOCK_ASSERT(); 3608 #endif 3609 ifp = ifma->ifma_ifp; 3610 #ifdef DIAGNOSTIC 3611 if (ifp == NULL) { 3612 printf("%s: ifma_ifp seems to be detached\n", __func__); 3613 } else { 3614 struct epoch_tracker et; 3615 struct ifnet *oifp; 3616 3617 NET_EPOCH_ENTER(et); 3618 CK_STAILQ_FOREACH(oifp, &V_ifnet, if_link) 3619 if (ifp == oifp) 3620 break; 3621 NET_EPOCH_EXIT(et); 3622 if (ifp != oifp) 3623 ifp = NULL; 3624 } 3625 #endif 3626 /* 3627 * If and only if the ifnet instance exists: Acquire the address lock. 3628 */ 3629 if (ifp != NULL) 3630 IF_ADDR_WLOCK(ifp); 3631 3632 lastref = if_delmulti_locked(ifp, ifma, flags); 3633 3634 if (ifp != NULL) { 3635 /* 3636 * If and only if the ifnet instance exists: 3637 * Release the address lock. 3638 * If the group was left: update the hardware hash filter. 3639 */ 3640 IF_ADDR_WUNLOCK(ifp); 3641 if (lastref && ifp->if_ioctl != NULL) { 3642 (void)(*ifp->if_ioctl)(ifp, SIOCDELMULTI, 0); 3643 } 3644 } 3645 } 3646 3647 /* 3648 * Perform deletion of network-layer and/or link-layer multicast address. 3649 * 3650 * Return 0 if the reference count was decremented. 3651 * Return 1 if the final reference was released, indicating that the 3652 * hardware hash filter should be reprogrammed. 3653 */ 3654 static int 3655 if_delmulti_locked(struct ifnet *ifp, struct ifmultiaddr *ifma, int detaching) 3656 { 3657 struct ifmultiaddr *ll_ifma; 3658 3659 if (ifp != NULL && ifma->ifma_ifp != NULL) { 3660 KASSERT(ifma->ifma_ifp == ifp, 3661 ("%s: inconsistent ifp %p", __func__, ifp)); 3662 IF_ADDR_WLOCK_ASSERT(ifp); 3663 } 3664 3665 ifp = ifma->ifma_ifp; 3666 MCDPRINTF("%s freeing %p from %s \n", __func__, ifma, ifp ? ifp->if_xname : ""); 3667 3668 /* 3669 * If the ifnet is detaching, null out references to ifnet, 3670 * so that upper protocol layers will notice, and not attempt 3671 * to obtain locks for an ifnet which no longer exists. The 3672 * routing socket announcement must happen before the ifnet 3673 * instance is detached from the system. 3674 */ 3675 if (detaching) { 3676 #ifdef DIAGNOSTIC 3677 printf("%s: detaching ifnet instance %p\n", __func__, ifp); 3678 #endif 3679 /* 3680 * ifp may already be nulled out if we are being reentered 3681 * to delete the ll_ifma. 3682 */ 3683 if (ifp != NULL) { 3684 rt_newmaddrmsg(RTM_DELMADDR, ifma); 3685 ifma->ifma_ifp = NULL; 3686 } 3687 } 3688 3689 if (--ifma->ifma_refcount > 0) 3690 return 0; 3691 3692 if (ifp != NULL && detaching == 0 && (ifma->ifma_flags & IFMA_F_ENQUEUED)) { 3693 CK_STAILQ_REMOVE(&ifp->if_multiaddrs, ifma, ifmultiaddr, ifma_link); 3694 ifma->ifma_flags &= ~IFMA_F_ENQUEUED; 3695 } 3696 /* 3697 * If this ifma is a network-layer ifma, a link-layer ifma may 3698 * have been associated with it. Release it first if so. 3699 */ 3700 ll_ifma = ifma->ifma_llifma; 3701 if (ll_ifma != NULL) { 3702 KASSERT(ifma->ifma_lladdr != NULL, 3703 ("%s: llifma w/o lladdr", __func__)); 3704 if (detaching) 3705 ll_ifma->ifma_ifp = NULL; /* XXX */ 3706 if (--ll_ifma->ifma_refcount == 0) { 3707 if (ifp != NULL) { 3708 if (ll_ifma->ifma_flags & IFMA_F_ENQUEUED) { 3709 CK_STAILQ_REMOVE(&ifp->if_multiaddrs, ll_ifma, ifmultiaddr, 3710 ifma_link); 3711 ll_ifma->ifma_flags &= ~IFMA_F_ENQUEUED; 3712 } 3713 } 3714 if_freemulti(ll_ifma); 3715 } 3716 } 3717 #ifdef INVARIANTS 3718 if (ifp) { 3719 struct ifmultiaddr *ifmatmp; 3720 3721 CK_STAILQ_FOREACH(ifmatmp, &ifp->if_multiaddrs, ifma_link) 3722 MPASS(ifma != ifmatmp); 3723 } 3724 #endif 3725 if_freemulti(ifma); 3726 /* 3727 * The last reference to this instance of struct ifmultiaddr 3728 * was released; the hardware should be notified of this change. 3729 */ 3730 return 1; 3731 } 3732 3733 /* 3734 * Set the link layer address on an interface. 3735 * 3736 * At this time we only support certain types of interfaces, 3737 * and we don't allow the length of the address to change. 3738 * 3739 * Set noinline to be dtrace-friendly 3740 */ 3741 __noinline int 3742 if_setlladdr(struct ifnet *ifp, const u_char *lladdr, int len) 3743 { 3744 struct sockaddr_dl *sdl; 3745 struct ifaddr *ifa; 3746 struct ifreq ifr; 3747 3748 ifa = ifp->if_addr; 3749 if (ifa == NULL) 3750 return (EINVAL); 3751 3752 sdl = (struct sockaddr_dl *)ifa->ifa_addr; 3753 if (sdl == NULL) 3754 return (EINVAL); 3755 3756 if (len != sdl->sdl_alen) /* don't allow length to change */ 3757 return (EINVAL); 3758 3759 switch (ifp->if_type) { 3760 case IFT_ETHER: 3761 case IFT_XETHER: 3762 case IFT_L2VLAN: 3763 case IFT_BRIDGE: 3764 case IFT_IEEE8023ADLAG: 3765 bcopy(lladdr, LLADDR(sdl), len); 3766 break; 3767 default: 3768 return (ENODEV); 3769 } 3770 3771 /* 3772 * If the interface is already up, we need 3773 * to re-init it in order to reprogram its 3774 * address filter. 3775 */ 3776 if ((ifp->if_flags & IFF_UP) != 0) { 3777 if (ifp->if_ioctl) { 3778 ifp->if_flags &= ~IFF_UP; 3779 ifr.ifr_flags = ifp->if_flags & 0xffff; 3780 ifr.ifr_flagshigh = ifp->if_flags >> 16; 3781 (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr); 3782 ifp->if_flags |= IFF_UP; 3783 ifr.ifr_flags = ifp->if_flags & 0xffff; 3784 ifr.ifr_flagshigh = ifp->if_flags >> 16; 3785 (*ifp->if_ioctl)(ifp, SIOCSIFFLAGS, (caddr_t)&ifr); 3786 } 3787 } 3788 EVENTHANDLER_INVOKE(iflladdr_event, ifp); 3789 3790 return (0); 3791 } 3792 3793 /* 3794 * Compat function for handling basic encapsulation requests. 3795 * Not converted stacks (FDDI, IB, ..) supports traditional 3796 * output model: ARP (and other similar L2 protocols) are handled 3797 * inside output routine, arpresolve/nd6_resolve() returns MAC 3798 * address instead of full prepend. 3799 * 3800 * This function creates calculated header==MAC for IPv4/IPv6 and 3801 * returns EAFNOSUPPORT (which is then handled in ARP code) for other 3802 * address families. 3803 */ 3804 static int 3805 if_requestencap_default(struct ifnet *ifp, struct if_encap_req *req) 3806 { 3807 3808 if (req->rtype != IFENCAP_LL) 3809 return (EOPNOTSUPP); 3810 3811 if (req->bufsize < req->lladdr_len) 3812 return (ENOMEM); 3813 3814 switch (req->family) { 3815 case AF_INET: 3816 case AF_INET6: 3817 break; 3818 default: 3819 return (EAFNOSUPPORT); 3820 } 3821 3822 /* Copy lladdr to storage as is */ 3823 memmove(req->buf, req->lladdr, req->lladdr_len); 3824 req->bufsize = req->lladdr_len; 3825 req->lladdr_off = 0; 3826 3827 return (0); 3828 } 3829 3830 /* 3831 * Tunnel interfaces can nest, also they may cause infinite recursion 3832 * calls when misconfigured. We'll prevent this by detecting loops. 3833 * High nesting level may cause stack exhaustion. We'll prevent this 3834 * by introducing upper limit. 3835 * 3836 * Return 0, if tunnel nesting count is equal or less than limit. 3837 */ 3838 int 3839 if_tunnel_check_nesting(struct ifnet *ifp, struct mbuf *m, uint32_t cookie, 3840 int limit) 3841 { 3842 struct m_tag *mtag; 3843 int count; 3844 3845 count = 1; 3846 mtag = NULL; 3847 while ((mtag = m_tag_locate(m, cookie, 0, mtag)) != NULL) { 3848 if (*(struct ifnet **)(mtag + 1) == ifp) { 3849 log(LOG_NOTICE, "%s: loop detected\n", if_name(ifp)); 3850 return (EIO); 3851 } 3852 count++; 3853 } 3854 if (count > limit) { 3855 log(LOG_NOTICE, 3856 "%s: if_output recursively called too many times(%d)\n", 3857 if_name(ifp), count); 3858 return (EIO); 3859 } 3860 mtag = m_tag_alloc(cookie, 0, sizeof(struct ifnet *), M_NOWAIT); 3861 if (mtag == NULL) 3862 return (ENOMEM); 3863 *(struct ifnet **)(mtag + 1) = ifp; 3864 m_tag_prepend(m, mtag); 3865 return (0); 3866 } 3867 3868 /* 3869 * Get the link layer address that was read from the hardware at attach. 3870 * 3871 * This is only set by Ethernet NICs (IFT_ETHER), but laggX interfaces re-type 3872 * their component interfaces as IFT_IEEE8023ADLAG. 3873 */ 3874 int 3875 if_gethwaddr(struct ifnet *ifp, struct ifreq *ifr) 3876 { 3877 3878 if (ifp->if_hw_addr == NULL) 3879 return (ENODEV); 3880 3881 switch (ifp->if_type) { 3882 case IFT_ETHER: 3883 case IFT_IEEE8023ADLAG: 3884 bcopy(ifp->if_hw_addr, ifr->ifr_addr.sa_data, ifp->if_addrlen); 3885 return (0); 3886 default: 3887 return (ENODEV); 3888 } 3889 } 3890 3891 /* 3892 * The name argument must be a pointer to storage which will last as 3893 * long as the interface does. For physical devices, the result of 3894 * device_get_name(dev) is a good choice and for pseudo-devices a 3895 * static string works well. 3896 */ 3897 void 3898 if_initname(struct ifnet *ifp, const char *name, int unit) 3899 { 3900 ifp->if_dname = name; 3901 ifp->if_dunit = unit; 3902 if (unit != IF_DUNIT_NONE) 3903 snprintf(ifp->if_xname, IFNAMSIZ, "%s%d", name, unit); 3904 else 3905 strlcpy(ifp->if_xname, name, IFNAMSIZ); 3906 } 3907 3908 static int 3909 if_vlog(struct ifnet *ifp, int pri, const char *fmt, va_list ap) 3910 { 3911 char if_fmt[256]; 3912 3913 snprintf(if_fmt, sizeof(if_fmt), "%s: %s", ifp->if_xname, fmt); 3914 vlog(pri, if_fmt, ap); 3915 return (0); 3916 } 3917 3918 3919 int 3920 if_printf(struct ifnet *ifp, const char *fmt, ...) 3921 { 3922 va_list ap; 3923 3924 va_start(ap, fmt); 3925 if_vlog(ifp, LOG_INFO, fmt, ap); 3926 va_end(ap); 3927 return (0); 3928 } 3929 3930 int 3931 if_log(struct ifnet *ifp, int pri, const char *fmt, ...) 3932 { 3933 va_list ap; 3934 3935 va_start(ap, fmt); 3936 if_vlog(ifp, pri, fmt, ap); 3937 va_end(ap); 3938 return (0); 3939 } 3940 3941 void 3942 if_start(struct ifnet *ifp) 3943 { 3944 3945 (*(ifp)->if_start)(ifp); 3946 } 3947 3948 /* 3949 * Backwards compatibility interface for drivers 3950 * that have not implemented it 3951 */ 3952 static int 3953 if_transmit(struct ifnet *ifp, struct mbuf *m) 3954 { 3955 int error; 3956 3957 IFQ_HANDOFF(ifp, m, error); 3958 return (error); 3959 } 3960 3961 static void 3962 if_input_default(struct ifnet *ifp __unused, struct mbuf *m) 3963 { 3964 3965 m_freem(m); 3966 } 3967 3968 int 3969 if_handoff(struct ifqueue *ifq, struct mbuf *m, struct ifnet *ifp, int adjust) 3970 { 3971 int active = 0; 3972 3973 IF_LOCK(ifq); 3974 if (_IF_QFULL(ifq)) { 3975 IF_UNLOCK(ifq); 3976 if_inc_counter(ifp, IFCOUNTER_OQDROPS, 1); 3977 m_freem(m); 3978 return (0); 3979 } 3980 if (ifp != NULL) { 3981 if_inc_counter(ifp, IFCOUNTER_OBYTES, m->m_pkthdr.len + adjust); 3982 if (m->m_flags & (M_BCAST|M_MCAST)) 3983 if_inc_counter(ifp, IFCOUNTER_OMCASTS, 1); 3984 active = ifp->if_drv_flags & IFF_DRV_OACTIVE; 3985 } 3986 _IF_ENQUEUE(ifq, m); 3987 IF_UNLOCK(ifq); 3988 if (ifp != NULL && !active) 3989 (*(ifp)->if_start)(ifp); 3990 return (1); 3991 } 3992 3993 void 3994 if_register_com_alloc(u_char type, 3995 if_com_alloc_t *a, if_com_free_t *f) 3996 { 3997 3998 KASSERT(if_com_alloc[type] == NULL, 3999 ("if_register_com_alloc: %d already registered", type)); 4000 KASSERT(if_com_free[type] == NULL, 4001 ("if_register_com_alloc: %d free already registered", type)); 4002 4003 if_com_alloc[type] = a; 4004 if_com_free[type] = f; 4005 } 4006 4007 void 4008 if_deregister_com_alloc(u_char type) 4009 { 4010 4011 KASSERT(if_com_alloc[type] != NULL, 4012 ("if_deregister_com_alloc: %d not registered", type)); 4013 KASSERT(if_com_free[type] != NULL, 4014 ("if_deregister_com_alloc: %d free not registered", type)); 4015 4016 /* 4017 * Ensure all pending EPOCH(9) callbacks have been executed. This 4018 * fixes issues about late invocation of if_destroy(), which leads 4019 * to memory leak from if_com_alloc[type] allocated if_l2com. 4020 */ 4021 epoch_drain_callbacks(net_epoch_preempt); 4022 4023 if_com_alloc[type] = NULL; 4024 if_com_free[type] = NULL; 4025 } 4026 4027 /* API for driver access to network stack owned ifnet.*/ 4028 uint64_t 4029 if_setbaudrate(struct ifnet *ifp, uint64_t baudrate) 4030 { 4031 uint64_t oldbrate; 4032 4033 oldbrate = ifp->if_baudrate; 4034 ifp->if_baudrate = baudrate; 4035 return (oldbrate); 4036 } 4037 4038 uint64_t 4039 if_getbaudrate(if_t ifp) 4040 { 4041 4042 return (((struct ifnet *)ifp)->if_baudrate); 4043 } 4044 4045 int 4046 if_setcapabilities(if_t ifp, int capabilities) 4047 { 4048 ((struct ifnet *)ifp)->if_capabilities = capabilities; 4049 return (0); 4050 } 4051 4052 int 4053 if_setcapabilitiesbit(if_t ifp, int setbit, int clearbit) 4054 { 4055 ((struct ifnet *)ifp)->if_capabilities |= setbit; 4056 ((struct ifnet *)ifp)->if_capabilities &= ~clearbit; 4057 4058 return (0); 4059 } 4060 4061 int 4062 if_getcapabilities(if_t ifp) 4063 { 4064 return ((struct ifnet *)ifp)->if_capabilities; 4065 } 4066 4067 int 4068 if_setcapenable(if_t ifp, int capabilities) 4069 { 4070 ((struct ifnet *)ifp)->if_capenable = capabilities; 4071 return (0); 4072 } 4073 4074 int 4075 if_setcapenablebit(if_t ifp, int setcap, int clearcap) 4076 { 4077 if(setcap) 4078 ((struct ifnet *)ifp)->if_capenable |= setcap; 4079 if(clearcap) 4080 ((struct ifnet *)ifp)->if_capenable &= ~clearcap; 4081 4082 return (0); 4083 } 4084 4085 const char * 4086 if_getdname(if_t ifp) 4087 { 4088 return ((struct ifnet *)ifp)->if_dname; 4089 } 4090 4091 int 4092 if_togglecapenable(if_t ifp, int togglecap) 4093 { 4094 ((struct ifnet *)ifp)->if_capenable ^= togglecap; 4095 return (0); 4096 } 4097 4098 int 4099 if_getcapenable(if_t ifp) 4100 { 4101 return ((struct ifnet *)ifp)->if_capenable; 4102 } 4103 4104 /* 4105 * This is largely undesirable because it ties ifnet to a device, but does 4106 * provide flexiblity for an embedded product vendor. Should be used with 4107 * the understanding that it violates the interface boundaries, and should be 4108 * a last resort only. 4109 */ 4110 int 4111 if_setdev(if_t ifp, void *dev) 4112 { 4113 return (0); 4114 } 4115 4116 int 4117 if_setdrvflagbits(if_t ifp, int set_flags, int clear_flags) 4118 { 4119 ((struct ifnet *)ifp)->if_drv_flags |= set_flags; 4120 ((struct ifnet *)ifp)->if_drv_flags &= ~clear_flags; 4121 4122 return (0); 4123 } 4124 4125 int 4126 if_getdrvflags(if_t ifp) 4127 { 4128 return ((struct ifnet *)ifp)->if_drv_flags; 4129 } 4130 4131 int 4132 if_setdrvflags(if_t ifp, int flags) 4133 { 4134 ((struct ifnet *)ifp)->if_drv_flags = flags; 4135 return (0); 4136 } 4137 4138 int 4139 if_setflags(if_t ifp, int flags) 4140 { 4141 4142 ifp->if_flags = flags; 4143 return (0); 4144 } 4145 4146 int 4147 if_setflagbits(if_t ifp, int set, int clear) 4148 { 4149 ((struct ifnet *)ifp)->if_flags |= set; 4150 ((struct ifnet *)ifp)->if_flags &= ~clear; 4151 4152 return (0); 4153 } 4154 4155 int 4156 if_getflags(if_t ifp) 4157 { 4158 return ((struct ifnet *)ifp)->if_flags; 4159 } 4160 4161 int 4162 if_clearhwassist(if_t ifp) 4163 { 4164 ((struct ifnet *)ifp)->if_hwassist = 0; 4165 return (0); 4166 } 4167 4168 int 4169 if_sethwassistbits(if_t ifp, int toset, int toclear) 4170 { 4171 ((struct ifnet *)ifp)->if_hwassist |= toset; 4172 ((struct ifnet *)ifp)->if_hwassist &= ~toclear; 4173 4174 return (0); 4175 } 4176 4177 int 4178 if_sethwassist(if_t ifp, int hwassist_bit) 4179 { 4180 ((struct ifnet *)ifp)->if_hwassist = hwassist_bit; 4181 return (0); 4182 } 4183 4184 int 4185 if_gethwassist(if_t ifp) 4186 { 4187 return ((struct ifnet *)ifp)->if_hwassist; 4188 } 4189 4190 int 4191 if_setmtu(if_t ifp, int mtu) 4192 { 4193 ((struct ifnet *)ifp)->if_mtu = mtu; 4194 return (0); 4195 } 4196 4197 int 4198 if_getmtu(if_t ifp) 4199 { 4200 return ((struct ifnet *)ifp)->if_mtu; 4201 } 4202 4203 int 4204 if_getmtu_family(if_t ifp, int family) 4205 { 4206 struct domain *dp; 4207 4208 for (dp = domains; dp; dp = dp->dom_next) { 4209 if (dp->dom_family == family && dp->dom_ifmtu != NULL) 4210 return (dp->dom_ifmtu((struct ifnet *)ifp)); 4211 } 4212 4213 return (((struct ifnet *)ifp)->if_mtu); 4214 } 4215 4216 /* 4217 * Methods for drivers to access interface unicast and multicast 4218 * link level addresses. Driver shall not know 'struct ifaddr' neither 4219 * 'struct ifmultiaddr'. 4220 */ 4221 u_int 4222 if_lladdr_count(if_t ifp) 4223 { 4224 struct epoch_tracker et; 4225 struct ifaddr *ifa; 4226 u_int count; 4227 4228 count = 0; 4229 NET_EPOCH_ENTER(et); 4230 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) 4231 if (ifa->ifa_addr->sa_family == AF_LINK) 4232 count++; 4233 NET_EPOCH_EXIT(et); 4234 4235 return (count); 4236 } 4237 4238 u_int 4239 if_foreach_lladdr(if_t ifp, iflladdr_cb_t cb, void *cb_arg) 4240 { 4241 struct epoch_tracker et; 4242 struct ifaddr *ifa; 4243 u_int count; 4244 4245 MPASS(cb); 4246 4247 count = 0; 4248 NET_EPOCH_ENTER(et); 4249 CK_STAILQ_FOREACH(ifa, &ifp->if_addrhead, ifa_link) { 4250 if (ifa->ifa_addr->sa_family != AF_LINK) 4251 continue; 4252 count += (*cb)(cb_arg, (struct sockaddr_dl *)ifa->ifa_addr, 4253 count); 4254 } 4255 NET_EPOCH_EXIT(et); 4256 4257 return (count); 4258 } 4259 4260 u_int 4261 if_llmaddr_count(if_t ifp) 4262 { 4263 struct epoch_tracker et; 4264 struct ifmultiaddr *ifma; 4265 int count; 4266 4267 count = 0; 4268 NET_EPOCH_ENTER(et); 4269 CK_STAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) 4270 if (ifma->ifma_addr->sa_family == AF_LINK) 4271 count++; 4272 NET_EPOCH_EXIT(et); 4273 4274 return (count); 4275 } 4276 4277 u_int 4278 if_foreach_llmaddr(if_t ifp, iflladdr_cb_t cb, void *cb_arg) 4279 { 4280 struct epoch_tracker et; 4281 struct ifmultiaddr *ifma; 4282 u_int count; 4283 4284 MPASS(cb); 4285 4286 count = 0; 4287 NET_EPOCH_ENTER(et); 4288 CK_STAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) { 4289 if (ifma->ifma_addr->sa_family != AF_LINK) 4290 continue; 4291 count += (*cb)(cb_arg, (struct sockaddr_dl *)ifma->ifma_addr, 4292 count); 4293 } 4294 NET_EPOCH_EXIT(et); 4295 4296 return (count); 4297 } 4298 4299 int 4300 if_setsoftc(if_t ifp, void *softc) 4301 { 4302 ((struct ifnet *)ifp)->if_softc = softc; 4303 return (0); 4304 } 4305 4306 void * 4307 if_getsoftc(if_t ifp) 4308 { 4309 return ((struct ifnet *)ifp)->if_softc; 4310 } 4311 4312 void 4313 if_setrcvif(struct mbuf *m, if_t ifp) 4314 { 4315 4316 MPASS((m->m_pkthdr.csum_flags & CSUM_SND_TAG) == 0); 4317 m->m_pkthdr.rcvif = (struct ifnet *)ifp; 4318 } 4319 4320 void 4321 if_setvtag(struct mbuf *m, uint16_t tag) 4322 { 4323 m->m_pkthdr.ether_vtag = tag; 4324 } 4325 4326 uint16_t 4327 if_getvtag(struct mbuf *m) 4328 { 4329 4330 return (m->m_pkthdr.ether_vtag); 4331 } 4332 4333 int 4334 if_sendq_empty(if_t ifp) 4335 { 4336 return IFQ_DRV_IS_EMPTY(&((struct ifnet *)ifp)->if_snd); 4337 } 4338 4339 struct ifaddr * 4340 if_getifaddr(if_t ifp) 4341 { 4342 return ((struct ifnet *)ifp)->if_addr; 4343 } 4344 4345 int 4346 if_getamcount(if_t ifp) 4347 { 4348 return ((struct ifnet *)ifp)->if_amcount; 4349 } 4350 4351 int 4352 if_setsendqready(if_t ifp) 4353 { 4354 IFQ_SET_READY(&((struct ifnet *)ifp)->if_snd); 4355 return (0); 4356 } 4357 4358 int 4359 if_setsendqlen(if_t ifp, int tx_desc_count) 4360 { 4361 IFQ_SET_MAXLEN(&((struct ifnet *)ifp)->if_snd, tx_desc_count); 4362 ((struct ifnet *)ifp)->if_snd.ifq_drv_maxlen = tx_desc_count; 4363 4364 return (0); 4365 } 4366 4367 int 4368 if_vlantrunkinuse(if_t ifp) 4369 { 4370 return ((struct ifnet *)ifp)->if_vlantrunk != NULL?1:0; 4371 } 4372 4373 int 4374 if_input(if_t ifp, struct mbuf* sendmp) 4375 { 4376 (*((struct ifnet *)ifp)->if_input)((struct ifnet *)ifp, sendmp); 4377 return (0); 4378 4379 } 4380 4381 struct mbuf * 4382 if_dequeue(if_t ifp) 4383 { 4384 struct mbuf *m; 4385 IFQ_DRV_DEQUEUE(&((struct ifnet *)ifp)->if_snd, m); 4386 4387 return (m); 4388 } 4389 4390 int 4391 if_sendq_prepend(if_t ifp, struct mbuf *m) 4392 { 4393 IFQ_DRV_PREPEND(&((struct ifnet *)ifp)->if_snd, m); 4394 return (0); 4395 } 4396 4397 int 4398 if_setifheaderlen(if_t ifp, int len) 4399 { 4400 ((struct ifnet *)ifp)->if_hdrlen = len; 4401 return (0); 4402 } 4403 4404 caddr_t 4405 if_getlladdr(if_t ifp) 4406 { 4407 return (IF_LLADDR((struct ifnet *)ifp)); 4408 } 4409 4410 void * 4411 if_gethandle(u_char type) 4412 { 4413 return (if_alloc(type)); 4414 } 4415 4416 void 4417 if_bpfmtap(if_t ifh, struct mbuf *m) 4418 { 4419 struct ifnet *ifp = (struct ifnet *)ifh; 4420 4421 BPF_MTAP(ifp, m); 4422 } 4423 4424 void 4425 if_etherbpfmtap(if_t ifh, struct mbuf *m) 4426 { 4427 struct ifnet *ifp = (struct ifnet *)ifh; 4428 4429 ETHER_BPF_MTAP(ifp, m); 4430 } 4431 4432 void 4433 if_vlancap(if_t ifh) 4434 { 4435 struct ifnet *ifp = (struct ifnet *)ifh; 4436 VLAN_CAPABILITIES(ifp); 4437 } 4438 4439 int 4440 if_sethwtsomax(if_t ifp, u_int if_hw_tsomax) 4441 { 4442 4443 ((struct ifnet *)ifp)->if_hw_tsomax = if_hw_tsomax; 4444 return (0); 4445 } 4446 4447 int 4448 if_sethwtsomaxsegcount(if_t ifp, u_int if_hw_tsomaxsegcount) 4449 { 4450 4451 ((struct ifnet *)ifp)->if_hw_tsomaxsegcount = if_hw_tsomaxsegcount; 4452 return (0); 4453 } 4454 4455 int 4456 if_sethwtsomaxsegsize(if_t ifp, u_int if_hw_tsomaxsegsize) 4457 { 4458 4459 ((struct ifnet *)ifp)->if_hw_tsomaxsegsize = if_hw_tsomaxsegsize; 4460 return (0); 4461 } 4462 4463 u_int 4464 if_gethwtsomax(if_t ifp) 4465 { 4466 4467 return (((struct ifnet *)ifp)->if_hw_tsomax); 4468 } 4469 4470 u_int 4471 if_gethwtsomaxsegcount(if_t ifp) 4472 { 4473 4474 return (((struct ifnet *)ifp)->if_hw_tsomaxsegcount); 4475 } 4476 4477 u_int 4478 if_gethwtsomaxsegsize(if_t ifp) 4479 { 4480 4481 return (((struct ifnet *)ifp)->if_hw_tsomaxsegsize); 4482 } 4483 4484 void 4485 if_setinitfn(if_t ifp, void (*init_fn)(void *)) 4486 { 4487 ((struct ifnet *)ifp)->if_init = init_fn; 4488 } 4489 4490 void 4491 if_setioctlfn(if_t ifp, int (*ioctl_fn)(if_t, u_long, caddr_t)) 4492 { 4493 ((struct ifnet *)ifp)->if_ioctl = (void *)ioctl_fn; 4494 } 4495 4496 void 4497 if_setstartfn(if_t ifp, void (*start_fn)(if_t)) 4498 { 4499 ((struct ifnet *)ifp)->if_start = (void *)start_fn; 4500 } 4501 4502 void 4503 if_settransmitfn(if_t ifp, if_transmit_fn_t start_fn) 4504 { 4505 ((struct ifnet *)ifp)->if_transmit = start_fn; 4506 } 4507 4508 void if_setqflushfn(if_t ifp, if_qflush_fn_t flush_fn) 4509 { 4510 ((struct ifnet *)ifp)->if_qflush = flush_fn; 4511 4512 } 4513 4514 void 4515 if_setgetcounterfn(if_t ifp, if_get_counter_t fn) 4516 { 4517 4518 ifp->if_get_counter = fn; 4519 } 4520 4521 #ifdef DDB 4522 static void 4523 if_show_ifnet(struct ifnet *ifp) 4524 { 4525 4526 if (ifp == NULL) 4527 return; 4528 db_printf("%s:\n", ifp->if_xname); 4529 #define IF_DB_PRINTF(f, e) db_printf(" %s = " f "\n", #e, ifp->e); 4530 IF_DB_PRINTF("%s", if_dname); 4531 IF_DB_PRINTF("%d", if_dunit); 4532 IF_DB_PRINTF("%s", if_description); 4533 IF_DB_PRINTF("%u", if_index); 4534 IF_DB_PRINTF("%d", if_idxgen); 4535 IF_DB_PRINTF("%u", if_refcount); 4536 IF_DB_PRINTF("%p", if_softc); 4537 IF_DB_PRINTF("%p", if_l2com); 4538 IF_DB_PRINTF("%p", if_llsoftc); 4539 IF_DB_PRINTF("%d", if_amcount); 4540 IF_DB_PRINTF("%p", if_addr); 4541 IF_DB_PRINTF("%p", if_broadcastaddr); 4542 IF_DB_PRINTF("%p", if_afdata); 4543 IF_DB_PRINTF("%d", if_afdata_initialized); 4544 IF_DB_PRINTF("%u", if_fib); 4545 IF_DB_PRINTF("%p", if_vnet); 4546 IF_DB_PRINTF("%p", if_home_vnet); 4547 IF_DB_PRINTF("%p", if_vlantrunk); 4548 IF_DB_PRINTF("%p", if_bpf); 4549 IF_DB_PRINTF("%u", if_pcount); 4550 IF_DB_PRINTF("%p", if_bridge); 4551 IF_DB_PRINTF("%p", if_lagg); 4552 IF_DB_PRINTF("%p", if_pf_kif); 4553 IF_DB_PRINTF("%p", if_carp); 4554 IF_DB_PRINTF("%p", if_label); 4555 IF_DB_PRINTF("%p", if_netmap); 4556 IF_DB_PRINTF("0x%08x", if_flags); 4557 IF_DB_PRINTF("0x%08x", if_drv_flags); 4558 IF_DB_PRINTF("0x%08x", if_capabilities); 4559 IF_DB_PRINTF("0x%08x", if_capenable); 4560 IF_DB_PRINTF("%p", if_snd.ifq_head); 4561 IF_DB_PRINTF("%p", if_snd.ifq_tail); 4562 IF_DB_PRINTF("%d", if_snd.ifq_len); 4563 IF_DB_PRINTF("%d", if_snd.ifq_maxlen); 4564 IF_DB_PRINTF("%p", if_snd.ifq_drv_head); 4565 IF_DB_PRINTF("%p", if_snd.ifq_drv_tail); 4566 IF_DB_PRINTF("%d", if_snd.ifq_drv_len); 4567 IF_DB_PRINTF("%d", if_snd.ifq_drv_maxlen); 4568 IF_DB_PRINTF("%d", if_snd.altq_type); 4569 IF_DB_PRINTF("%x", if_snd.altq_flags); 4570 #undef IF_DB_PRINTF 4571 } 4572 4573 DB_SHOW_COMMAND(ifnet, db_show_ifnet) 4574 { 4575 4576 if (!have_addr) { 4577 db_printf("usage: show ifnet <struct ifnet *>\n"); 4578 return; 4579 } 4580 4581 if_show_ifnet((struct ifnet *)addr); 4582 } 4583 4584 DB_SHOW_ALL_COMMAND(ifnets, db_show_all_ifnets) 4585 { 4586 struct ifnet *ifp; 4587 u_short idx; 4588 4589 for (idx = 1; idx <= if_index; idx++) { 4590 ifp = ifindex_table[idx].ife_ifnet; 4591 if (ifp == NULL) 4592 continue; 4593 db_printf( "%20s ifp=%p\n", ifp->if_xname, ifp); 4594 if (db_pager_quit) 4595 break; 4596 } 4597 } 4598 #endif /* DDB */ 4599