if_var.h revision 257351
1/*- 2 * Copyright (c) 1982, 1986, 1989, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 4. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * From: @(#)if.h 8.1 (Berkeley) 6/10/93 30 * $FreeBSD: head/sys/net/if_var.h 257351 2013-10-29 17:48:08Z andre $ 31 */ 32 33#ifndef _NET_IF_VAR_H_ 34#define _NET_IF_VAR_H_ 35 36/* 37 * Structures defining a network interface, providing a packet 38 * transport mechanism (ala level 0 of the PUP protocols). 39 * 40 * Each interface accepts output datagrams of a specified maximum 41 * length, and provides higher level routines with input datagrams 42 * received from its medium. 43 * 44 * Output occurs when the routine if_output is called, with three parameters: 45 * (*ifp->if_output)(ifp, m, dst, rt) 46 * Here m is the mbuf chain to be sent and dst is the destination address. 47 * The output routine encapsulates the supplied datagram if necessary, 48 * and then transmits it on its medium. 49 * 50 * On input, each interface unwraps the data received by it, and either 51 * places it on the input queue of an internetwork datagram routine 52 * and posts the associated software interrupt, or passes the datagram to a raw 53 * packet input routine. 54 * 55 * Routines exist for locating interfaces by their addresses 56 * or for locating an interface on a certain network, as well as more general 57 * routing and gateway routines maintaining information used to locate 58 * interfaces. These routines live in the files if.c and route.c 59 */ 60 61struct rtentry; /* ifa_rtrequest */ 62struct rt_addrinfo; /* ifa_rtrequest */ 63struct socket; 64struct carp_if; 65struct carp_softc; 66struct ifvlantrunk; 67struct route; /* if_output */ 68struct vnet; 69 70#ifdef _KERNEL 71#include <sys/mbuf.h> /* ifqueue only? */ 72#include <sys/buf_ring.h> 73#include <net/vnet.h> 74#endif /* _KERNEL */ 75#include <sys/counter.h> 76#include <sys/lock.h> /* XXX */ 77#include <sys/mutex.h> /* struct ifqueue */ 78#include <sys/rwlock.h> /* XXX */ 79#include <sys/sx.h> /* XXX */ 80#include <sys/_task.h> /* if_link_task */ 81 82#define IF_DUNIT_NONE -1 83 84#include <altq/if_altq.h> 85 86TAILQ_HEAD(ifnethead, ifnet); /* we use TAILQs so that the order of */ 87TAILQ_HEAD(ifaddrhead, ifaddr); /* instantiation is preserved in the list */ 88TAILQ_HEAD(ifmultihead, ifmultiaddr); 89TAILQ_HEAD(ifgrouphead, ifg_group); 90 91#ifdef _KERNEL 92VNET_DECLARE(struct pfil_head, link_pfil_hook); /* packet filter hooks */ 93#define V_link_pfil_hook VNET(link_pfil_hook) 94#endif /* _KERNEL */ 95 96/* 97 * Structure defining a network interface. 98 * 99 * (Would like to call this struct ``if'', but C isn't PL/1.) 100 */ 101 102struct ifnet { 103 void *if_softc; /* pointer to driver state */ 104 void *if_l2com; /* pointer to protocol bits */ 105 struct vnet *if_vnet; /* pointer to network stack instance */ 106 TAILQ_ENTRY(ifnet) if_link; /* all struct ifnets are chained */ 107 char if_xname[IFNAMSIZ]; /* external name (name + unit) */ 108 const char *if_dname; /* driver name */ 109 int if_dunit; /* unit or IF_DUNIT_NONE */ 110 u_int if_refcount; /* reference count */ 111 struct ifaddrhead if_addrhead; /* linked list of addresses per if */ 112 /* 113 * if_addrhead is the list of all addresses associated to 114 * an interface. 115 * Some code in the kernel assumes that first element 116 * of the list has type AF_LINK, and contains sockaddr_dl 117 * addresses which store the link-level address and the name 118 * of the interface. 119 * However, access to the AF_LINK address through this 120 * field is deprecated. Use if_addr or ifaddr_byindex() instead. 121 */ 122 int if_pcount; /* number of promiscuous listeners */ 123 struct carp_if *if_carp; /* carp interface structure */ 124 struct bpf_if *if_bpf; /* packet filter structure */ 125 u_short if_index; /* numeric abbreviation for this if */ 126 short if_index_reserved; /* spare space to grow if_index */ 127 struct ifvlantrunk *if_vlantrunk; /* pointer to 802.1q data */ 128 int if_flags; /* up/down, broadcast, etc. */ 129 int if_capabilities; /* interface features & capabilities */ 130 int if_capenable; /* enabled features & capabilities */ 131 void *if_linkmib; /* link-type-specific MIB data */ 132 size_t if_linkmiblen; /* length of above data */ 133 struct if_data if_data; 134 struct ifmultihead if_multiaddrs; /* multicast addresses configured */ 135 int if_amcount; /* number of all-multicast requests */ 136/* procedure handles */ 137 int (*if_output) /* output routine (enqueue) */ 138 (struct ifnet *, struct mbuf *, const struct sockaddr *, 139 struct route *); 140 void (*if_input) /* input routine (from h/w driver) */ 141 (struct ifnet *, struct mbuf *); 142 void (*if_start) /* initiate output routine */ 143 (struct ifnet *); 144 int (*if_ioctl) /* ioctl routine */ 145 (struct ifnet *, u_long, caddr_t); 146 void (*if_init) /* Init routine */ 147 (void *); 148 int (*if_resolvemulti) /* validate/resolve multicast */ 149 (struct ifnet *, struct sockaddr **, struct sockaddr *); 150 void (*if_qflush) /* flush any queues */ 151 (struct ifnet *); 152 int (*if_transmit) /* initiate output routine */ 153 (struct ifnet *, struct mbuf *); 154 void (*if_reassign) /* reassign to vnet routine */ 155 (struct ifnet *, struct vnet *, char *); 156 struct vnet *if_home_vnet; /* where this ifnet originates from */ 157 struct ifaddr *if_addr; /* pointer to link-level address */ 158 void *if_llsoftc; /* link layer softc */ 159 int if_drv_flags; /* driver-managed status flags */ 160 struct ifaltq if_snd; /* output queue (includes altq) */ 161 const u_int8_t *if_broadcastaddr; /* linklevel broadcast bytestring */ 162 163 void *if_bridge; /* bridge glue */ 164 165 struct label *if_label; /* interface MAC label */ 166 167 /* these are only used by IPv6 */ 168 void *if_unused[2]; 169 void *if_afdata[AF_MAX]; 170 int if_afdata_initialized; 171 struct rwlock if_afdata_lock; 172 struct task if_linktask; /* task for link change events */ 173 struct rwlock if_addr_lock; /* lock to protect address lists */ 174 175 LIST_ENTRY(ifnet) if_clones; /* interfaces of a cloner */ 176 TAILQ_HEAD(, ifg_list) if_groups; /* linked list of groups per if */ 177 /* protected by if_addr_lock */ 178 void *if_pf_kif; 179 void *if_lagg; /* lagg glue */ 180 char *if_description; /* interface description */ 181 u_int if_fib; /* interface FIB */ 182 u_char if_alloctype; /* if_type at time of allocation */ 183 184 u_int if_hw_tsomax; /* tso burst length limit, the minimum 185 * is (IP_MAXPACKET / 8). 186 * XXXAO: Have to find a better place 187 * for it eventually. */ 188 189 /* 190 * Spare fields are added so that we can modify sensitive data 191 * structures without changing the kernel binary interface, and must 192 * be used with care where binary compatibility is required. 193 */ 194 char if_cspare[3]; 195 int if_ispare[4]; 196 void *if_pspare[8]; /* 1 netmap, 7 TDB */ 197}; 198 199#include <net/ifq.h> /* XXXAO: temporary unconditional include */ 200 201/* 202 * XXX These aliases are terribly dangerous because they could apply 203 * to anything. 204 */ 205#define if_mtu if_data.ifi_mtu 206#define if_type if_data.ifi_type 207#define if_physical if_data.ifi_physical 208#define if_addrlen if_data.ifi_addrlen 209#define if_hdrlen if_data.ifi_hdrlen 210#define if_metric if_data.ifi_metric 211#define if_link_state if_data.ifi_link_state 212#define if_baudrate if_data.ifi_baudrate 213#define if_baudrate_pf if_data.ifi_baudrate_pf 214#define if_hwassist if_data.ifi_hwassist 215#define if_ipackets if_data.ifi_ipackets 216#define if_ierrors if_data.ifi_ierrors 217#define if_opackets if_data.ifi_opackets 218#define if_oerrors if_data.ifi_oerrors 219#define if_collisions if_data.ifi_collisions 220#define if_ibytes if_data.ifi_ibytes 221#define if_obytes if_data.ifi_obytes 222#define if_imcasts if_data.ifi_imcasts 223#define if_omcasts if_data.ifi_omcasts 224#define if_iqdrops if_data.ifi_iqdrops 225#define if_noproto if_data.ifi_noproto 226#define if_lastchange if_data.ifi_lastchange 227 228/* for compatibility with other BSDs */ 229#define if_addrlist if_addrhead 230#define if_list if_link 231#define if_name(ifp) ((ifp)->if_xname) 232 233/* 234 * Locks for address lists on the network interface. 235 */ 236#define IF_ADDR_LOCK_INIT(if) rw_init(&(if)->if_addr_lock, "if_addr_lock") 237#define IF_ADDR_LOCK_DESTROY(if) rw_destroy(&(if)->if_addr_lock) 238#define IF_ADDR_WLOCK(if) rw_wlock(&(if)->if_addr_lock) 239#define IF_ADDR_WUNLOCK(if) rw_wunlock(&(if)->if_addr_lock) 240#define IF_ADDR_RLOCK(if) rw_rlock(&(if)->if_addr_lock) 241#define IF_ADDR_RUNLOCK(if) rw_runlock(&(if)->if_addr_lock) 242#define IF_ADDR_LOCK_ASSERT(if) rw_assert(&(if)->if_addr_lock, RA_LOCKED) 243#define IF_ADDR_WLOCK_ASSERT(if) rw_assert(&(if)->if_addr_lock, RA_WLOCKED) 244 245/* 246 * Function variations on locking macros intended to be used by loadable 247 * kernel modules in order to divorce them from the internals of address list 248 * locking. 249 */ 250void if_addr_rlock(struct ifnet *ifp); /* if_addrhead */ 251void if_addr_runlock(struct ifnet *ifp); /* if_addrhead */ 252void if_maddr_rlock(struct ifnet *ifp); /* if_multiaddrs */ 253void if_maddr_runlock(struct ifnet *ifp); /* if_multiaddrs */ 254 255#ifdef _KERNEL 256#ifdef _SYS_EVENTHANDLER_H_ 257/* interface link layer address change event */ 258typedef void (*iflladdr_event_handler_t)(void *, struct ifnet *); 259EVENTHANDLER_DECLARE(iflladdr_event, iflladdr_event_handler_t); 260/* interface address change event */ 261typedef void (*ifaddr_event_handler_t)(void *, struct ifnet *); 262EVENTHANDLER_DECLARE(ifaddr_event, ifaddr_event_handler_t); 263/* new interface arrival event */ 264typedef void (*ifnet_arrival_event_handler_t)(void *, struct ifnet *); 265EVENTHANDLER_DECLARE(ifnet_arrival_event, ifnet_arrival_event_handler_t); 266/* interface departure event */ 267typedef void (*ifnet_departure_event_handler_t)(void *, struct ifnet *); 268EVENTHANDLER_DECLARE(ifnet_departure_event, ifnet_departure_event_handler_t); 269/* Interface link state change event */ 270typedef void (*ifnet_link_event_handler_t)(void *, struct ifnet *, int); 271EVENTHANDLER_DECLARE(ifnet_link_event, ifnet_link_event_handler_t); 272#endif /* _SYS_EVENTHANDLER_H_ */ 273 274/* 275 * interface groups 276 */ 277struct ifg_group { 278 char ifg_group[IFNAMSIZ]; 279 u_int ifg_refcnt; 280 void *ifg_pf_kif; 281 TAILQ_HEAD(, ifg_member) ifg_members; 282 TAILQ_ENTRY(ifg_group) ifg_next; 283}; 284 285struct ifg_member { 286 TAILQ_ENTRY(ifg_member) ifgm_next; 287 struct ifnet *ifgm_ifp; 288}; 289 290struct ifg_list { 291 struct ifg_group *ifgl_group; 292 TAILQ_ENTRY(ifg_list) ifgl_next; 293}; 294 295#ifdef _SYS_EVENTHANDLER_H_ 296/* group attach event */ 297typedef void (*group_attach_event_handler_t)(void *, struct ifg_group *); 298EVENTHANDLER_DECLARE(group_attach_event, group_attach_event_handler_t); 299/* group detach event */ 300typedef void (*group_detach_event_handler_t)(void *, struct ifg_group *); 301EVENTHANDLER_DECLARE(group_detach_event, group_detach_event_handler_t); 302/* group change event */ 303typedef void (*group_change_event_handler_t)(void *, const char *); 304EVENTHANDLER_DECLARE(group_change_event, group_change_event_handler_t); 305#endif /* _SYS_EVENTHANDLER_H_ */ 306 307#define IF_AFDATA_LOCK_INIT(ifp) \ 308 rw_init(&(ifp)->if_afdata_lock, "if_afdata") 309 310#define IF_AFDATA_WLOCK(ifp) rw_wlock(&(ifp)->if_afdata_lock) 311#define IF_AFDATA_RLOCK(ifp) rw_rlock(&(ifp)->if_afdata_lock) 312#define IF_AFDATA_WUNLOCK(ifp) rw_wunlock(&(ifp)->if_afdata_lock) 313#define IF_AFDATA_RUNLOCK(ifp) rw_runlock(&(ifp)->if_afdata_lock) 314#define IF_AFDATA_LOCK(ifp) IF_AFDATA_WLOCK(ifp) 315#define IF_AFDATA_UNLOCK(ifp) IF_AFDATA_WUNLOCK(ifp) 316#define IF_AFDATA_TRYLOCK(ifp) rw_try_wlock(&(ifp)->if_afdata_lock) 317#define IF_AFDATA_DESTROY(ifp) rw_destroy(&(ifp)->if_afdata_lock) 318 319#define IF_AFDATA_LOCK_ASSERT(ifp) rw_assert(&(ifp)->if_afdata_lock, RA_LOCKED) 320#define IF_AFDATA_RLOCK_ASSERT(ifp) rw_assert(&(ifp)->if_afdata_lock, RA_RLOCKED) 321#define IF_AFDATA_WLOCK_ASSERT(ifp) rw_assert(&(ifp)->if_afdata_lock, RA_WLOCKED) 322#define IF_AFDATA_UNLOCK_ASSERT(ifp) rw_assert(&(ifp)->if_afdata_lock, RA_UNLOCKED) 323 324static __inline void 325if_initbaudrate(struct ifnet *ifp, uintmax_t baud) 326{ 327 328 ifp->if_baudrate_pf = 0; 329 while (baud > (u_long)(~0UL)) { 330 baud /= 10; 331 ifp->if_baudrate_pf++; 332 } 333 ifp->if_baudrate = baud; 334} 335 336/* 337 * 72 was chosen below because it is the size of a TCP/IP 338 * header (40) + the minimum mss (32). 339 */ 340#define IF_MINMTU 72 341#define IF_MAXMTU 65535 342 343#define TOEDEV(ifp) ((ifp)->if_llsoftc) 344 345#endif /* _KERNEL */ 346 347/* 348 * The ifaddr structure contains information about one address 349 * of an interface. They are maintained by the different address families, 350 * are allocated and attached when an address is set, and are linked 351 * together so all addresses for an interface can be located. 352 * 353 * NOTE: a 'struct ifaddr' is always at the beginning of a larger 354 * chunk of malloc'ed memory, where we store the three addresses 355 * (ifa_addr, ifa_dstaddr and ifa_netmask) referenced here. 356 */ 357#if defined(_KERNEL) || defined(_WANT_IFADDR) 358struct ifaddr { 359 struct sockaddr *ifa_addr; /* address of interface */ 360 struct sockaddr *ifa_dstaddr; /* other end of p-to-p link */ 361#define ifa_broadaddr ifa_dstaddr /* broadcast address interface */ 362 struct sockaddr *ifa_netmask; /* used to determine subnet */ 363 struct ifnet *ifa_ifp; /* back-pointer to interface */ 364 struct carp_softc *ifa_carp; /* pointer to CARP data */ 365 TAILQ_ENTRY(ifaddr) ifa_link; /* queue macro glue */ 366 void (*ifa_rtrequest) /* check or clean routes (+ or -)'d */ 367 (int, struct rtentry *, struct rt_addrinfo *); 368 u_short ifa_flags; /* mostly rt_flags for cloning */ 369 u_int ifa_refcnt; /* references to this structure */ 370 int ifa_metric; /* cost of going out this interface */ 371 int (*ifa_claim_addr) /* check if an addr goes to this if */ 372 (struct ifaddr *, struct sockaddr *); 373 374 counter_u64_t ifa_ipackets; 375 counter_u64_t ifa_opackets; 376 counter_u64_t ifa_ibytes; 377 counter_u64_t ifa_obytes; 378}; 379#endif 380 381#ifdef _KERNEL 382#define IFA_ROUTE RTF_UP /* route installed */ 383#define IFA_RTSELF RTF_HOST /* loopback route to self installed */ 384 385/* For compatibility with other BSDs. SCTP uses it. */ 386#define ifa_list ifa_link 387 388struct ifaddr * ifa_alloc(size_t size, int flags); 389void ifa_free(struct ifaddr *ifa); 390void ifa_ref(struct ifaddr *ifa); 391#endif /* _KERNEL */ 392 393/* 394 * Multicast address structure. This is analogous to the ifaddr 395 * structure except that it keeps track of multicast addresses. 396 */ 397struct ifmultiaddr { 398 TAILQ_ENTRY(ifmultiaddr) ifma_link; /* queue macro glue */ 399 struct sockaddr *ifma_addr; /* address this membership is for */ 400 struct sockaddr *ifma_lladdr; /* link-layer translation, if any */ 401 struct ifnet *ifma_ifp; /* back-pointer to interface */ 402 u_int ifma_refcount; /* reference count */ 403 void *ifma_protospec; /* protocol-specific state, if any */ 404 struct ifmultiaddr *ifma_llifma; /* pointer to ifma for ifma_lladdr */ 405}; 406 407#ifdef _KERNEL 408 409extern struct rwlock ifnet_rwlock; 410extern struct sx ifnet_sxlock; 411 412#define IFNET_LOCK_INIT() do { \ 413 rw_init_flags(&ifnet_rwlock, "ifnet_rw", RW_RECURSE); \ 414 sx_init_flags(&ifnet_sxlock, "ifnet_sx", SX_RECURSE); \ 415} while(0) 416 417#define IFNET_WLOCK() do { \ 418 sx_xlock(&ifnet_sxlock); \ 419 rw_wlock(&ifnet_rwlock); \ 420} while (0) 421 422#define IFNET_WUNLOCK() do { \ 423 rw_wunlock(&ifnet_rwlock); \ 424 sx_xunlock(&ifnet_sxlock); \ 425} while (0) 426 427/* 428 * To assert the ifnet lock, you must know not only whether it's for read or 429 * write, but also whether it was acquired with sleep support or not. 430 */ 431#define IFNET_RLOCK_ASSERT() sx_assert(&ifnet_sxlock, SA_SLOCKED) 432#define IFNET_RLOCK_NOSLEEP_ASSERT() rw_assert(&ifnet_rwlock, RA_RLOCKED) 433#define IFNET_WLOCK_ASSERT() do { \ 434 sx_assert(&ifnet_sxlock, SA_XLOCKED); \ 435 rw_assert(&ifnet_rwlock, RA_WLOCKED); \ 436} while (0) 437 438#define IFNET_RLOCK() sx_slock(&ifnet_sxlock) 439#define IFNET_RLOCK_NOSLEEP() rw_rlock(&ifnet_rwlock) 440#define IFNET_RUNLOCK() sx_sunlock(&ifnet_sxlock) 441#define IFNET_RUNLOCK_NOSLEEP() rw_runlock(&ifnet_rwlock) 442 443/* 444 * Look up an ifnet given its index; the _ref variant also acquires a 445 * reference that must be freed using if_rele(). It is almost always a bug 446 * to call ifnet_byindex() instead if ifnet_byindex_ref(). 447 */ 448struct ifnet *ifnet_byindex(u_short idx); 449struct ifnet *ifnet_byindex_locked(u_short idx); 450struct ifnet *ifnet_byindex_ref(u_short idx); 451 452/* 453 * Given the index, ifaddr_byindex() returns the one and only 454 * link-level ifaddr for the interface. You are not supposed to use 455 * it to traverse the list of addresses associated to the interface. 456 */ 457struct ifaddr *ifaddr_byindex(u_short idx); 458 459VNET_DECLARE(struct ifnethead, ifnet); 460VNET_DECLARE(struct ifgrouphead, ifg_head); 461VNET_DECLARE(int, if_index); 462VNET_DECLARE(struct ifnet *, loif); /* first loopback interface */ 463VNET_DECLARE(int, useloopback); 464 465#define V_ifnet VNET(ifnet) 466#define V_ifg_head VNET(ifg_head) 467#define V_if_index VNET(if_index) 468#define V_loif VNET(loif) 469#define V_useloopback VNET(useloopback) 470 471int if_addgroup(struct ifnet *, const char *); 472int if_delgroup(struct ifnet *, const char *); 473int if_addmulti(struct ifnet *, struct sockaddr *, struct ifmultiaddr **); 474int if_allmulti(struct ifnet *, int); 475struct ifnet* if_alloc(u_char); 476void if_attach(struct ifnet *); 477void if_dead(struct ifnet *); 478int if_delmulti(struct ifnet *, struct sockaddr *); 479void if_delmulti_ifma(struct ifmultiaddr *); 480void if_detach(struct ifnet *); 481void if_vmove(struct ifnet *, struct vnet *); 482void if_purgeaddrs(struct ifnet *); 483void if_delallmulti(struct ifnet *); 484void if_down(struct ifnet *); 485struct ifmultiaddr * 486 if_findmulti(struct ifnet *, struct sockaddr *); 487void if_free(struct ifnet *); 488void if_initname(struct ifnet *, const char *, int); 489void if_link_state_change(struct ifnet *, int); 490int if_printf(struct ifnet *, const char *, ...) __printflike(2, 3); 491void if_ref(struct ifnet *); 492void if_rele(struct ifnet *); 493int if_setlladdr(struct ifnet *, const u_char *, int); 494void if_up(struct ifnet *); 495int ifioctl(struct socket *, u_long, caddr_t, struct thread *); 496int ifpromisc(struct ifnet *, int); 497struct ifnet *ifunit(const char *); 498struct ifnet *ifunit_ref(const char *); 499 500int ifa_add_loopback_route(struct ifaddr *, struct sockaddr *); 501int ifa_del_loopback_route(struct ifaddr *, struct sockaddr *); 502 503struct ifaddr *ifa_ifwithaddr(struct sockaddr *); 504int ifa_ifwithaddr_check(struct sockaddr *); 505struct ifaddr *ifa_ifwithbroadaddr(struct sockaddr *); 506struct ifaddr *ifa_ifwithdstaddr(struct sockaddr *); 507struct ifaddr *ifa_ifwithnet(struct sockaddr *, int); 508struct ifaddr *ifa_ifwithroute(int, struct sockaddr *, struct sockaddr *); 509struct ifaddr *ifa_ifwithroute_fib(int, struct sockaddr *, struct sockaddr *, u_int); 510struct ifaddr *ifaof_ifpforaddr(struct sockaddr *, struct ifnet *); 511int ifa_preferred(struct ifaddr *, struct ifaddr *); 512 513int if_simloop(struct ifnet *ifp, struct mbuf *m, int af, int hlen); 514 515typedef void *if_com_alloc_t(u_char type, struct ifnet *ifp); 516typedef void if_com_free_t(void *com, u_char type); 517void if_register_com_alloc(u_char type, if_com_alloc_t *a, if_com_free_t *f); 518void if_deregister_com_alloc(u_char type); 519 520#define IF_LLADDR(ifp) \ 521 LLADDR((struct sockaddr_dl *)((ifp)->if_addr->ifa_addr)) 522 523#endif /* _KERNEL */ 524 525#endif /* !_NET_IF_VAR_H_ */ 526