if_var.h revision 264887
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 264887 2014-04-24 17:23:16Z asomers $ 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 * Size ILP32: 592 (approx) 100 * LP64: 1048 (approx) 101 */ 102struct ifnet { 103 /* General book keeping of interface lists. */ 104 TAILQ_ENTRY(ifnet) if_link; /* all struct ifnets are chained */ 105 LIST_ENTRY(ifnet) if_clones; /* interfaces of a cloner */ 106 TAILQ_HEAD(, ifg_list) if_groups; /* linked list of groups per if */ 107 /* protected by if_addr_lock */ 108 u_char if_alloctype; /* if_type at time of allocation */ 109 110 /* Driver and protocol specific information that remains stable. */ 111 void *if_softc; /* pointer to driver state */ 112 void *if_llsoftc; /* link layer softc */ 113 void *if_l2com; /* pointer to protocol bits */ 114 const char *if_dname; /* driver name */ 115 int if_dunit; /* unit or IF_DUNIT_NONE */ 116 u_short if_index; /* numeric abbreviation for this if */ 117 short if_index_reserved; /* spare space to grow if_index */ 118 char if_xname[IFNAMSIZ]; /* external name (name + unit) */ 119 char *if_description; /* interface description */ 120 121 /* Variable fields that are touched by the stack and drivers. */ 122 int if_flags; /* up/down, broadcast, etc. */ 123 int if_capabilities; /* interface features & capabilities */ 124 int if_capenable; /* enabled features & capabilities */ 125 void *if_linkmib; /* link-type-specific MIB data */ 126 size_t if_linkmiblen; /* length of above data */ 127 int if_drv_flags; /* driver-managed status flags */ 128 u_int if_refcount; /* reference count */ 129 struct ifaltq if_snd; /* output queue (includes altq) */ 130 struct if_data if_data; /* type information and statistics */ 131 struct task if_linktask; /* task for link change events */ 132 133 /* Addresses of different protocol families assigned to this if. */ 134 struct rwlock if_addr_lock; /* lock to protect address lists */ 135 /* 136 * if_addrhead is the list of all addresses associated to 137 * an interface. 138 * Some code in the kernel assumes that first element 139 * of the list has type AF_LINK, and contains sockaddr_dl 140 * addresses which store the link-level address and the name 141 * of the interface. 142 * However, access to the AF_LINK address through this 143 * field is deprecated. Use if_addr or ifaddr_byindex() instead. 144 */ 145 struct ifaddrhead if_addrhead; /* linked list of addresses per if */ 146 struct ifmultihead if_multiaddrs; /* multicast addresses configured */ 147 int if_amcount; /* number of all-multicast requests */ 148 struct ifaddr *if_addr; /* pointer to link-level address */ 149 const u_int8_t *if_broadcastaddr; /* linklevel broadcast bytestring */ 150 struct rwlock if_afdata_lock; 151 void *if_afdata[AF_MAX]; 152 int if_afdata_initialized; 153 154 /* Additional features hung off the interface. */ 155 u_int if_fib; /* interface FIB */ 156 struct vnet *if_vnet; /* pointer to network stack instance */ 157 struct vnet *if_home_vnet; /* where this ifnet originates from */ 158 struct ifvlantrunk *if_vlantrunk; /* pointer to 802.1q data */ 159 struct bpf_if *if_bpf; /* packet filter structure */ 160 int if_pcount; /* number of promiscuous listeners */ 161 void *if_bridge; /* bridge glue */ 162 void *if_lagg; /* lagg glue */ 163 void *if_pf_kif; /* pf glue */ 164 struct carp_if *if_carp; /* carp interface structure */ 165 struct label *if_label; /* interface MAC label */ 166 167 /* Various procedures of the layer2 encapsulation and drivers. */ 168 int (*if_output) /* output routine (enqueue) */ 169 (struct ifnet *, struct mbuf *, const struct sockaddr *, 170 struct route *); 171 void (*if_input) /* input routine (from h/w driver) */ 172 (struct ifnet *, struct mbuf *); 173 void (*if_start) /* initiate output routine */ 174 (struct ifnet *); 175 int (*if_ioctl) /* ioctl routine */ 176 (struct ifnet *, u_long, caddr_t); 177 void (*if_init) /* Init routine */ 178 (void *); 179 int (*if_resolvemulti) /* validate/resolve multicast */ 180 (struct ifnet *, struct sockaddr **, struct sockaddr *); 181 void (*if_qflush) /* flush any queues */ 182 (struct ifnet *); 183 int (*if_transmit) /* initiate output routine */ 184 (struct ifnet *, struct mbuf *); 185 void (*if_reassign) /* reassign to vnet routine */ 186 (struct ifnet *, struct vnet *, char *); 187 188 /* Stuff that's only temporary and doesn't belong here. */ 189 u_int if_hw_tsomax; /* tso burst length limit, the minimum 190 * is (IP_MAXPACKET / 8). 191 * XXXAO: Have to find a better place 192 * for it eventually. */ 193 /* 194 * Spare fields are added so that we can modify sensitive data 195 * structures without changing the kernel binary interface, and must 196 * be used with care where binary compatibility is required. 197 */ 198 char if_cspare[3]; 199 int if_ispare[4]; 200 void *if_unused[2]; 201 void *if_pspare[8]; /* 1 netmap, 7 TDB */ 202}; 203 204#include <net/ifq.h> /* XXXAO: temporary unconditional include */ 205 206/* 207 * XXX These aliases are terribly dangerous because they could apply 208 * to anything. 209 */ 210#define if_mtu if_data.ifi_mtu 211#define if_type if_data.ifi_type 212#define if_physical if_data.ifi_physical 213#define if_addrlen if_data.ifi_addrlen 214#define if_hdrlen if_data.ifi_hdrlen 215#define if_metric if_data.ifi_metric 216#define if_link_state if_data.ifi_link_state 217#define if_baudrate if_data.ifi_baudrate 218#define if_hwassist if_data.ifi_hwassist 219#define if_ipackets if_data.ifi_ipackets 220#define if_ierrors if_data.ifi_ierrors 221#define if_opackets if_data.ifi_opackets 222#define if_oerrors if_data.ifi_oerrors 223#define if_collisions if_data.ifi_collisions 224#define if_ibytes if_data.ifi_ibytes 225#define if_obytes if_data.ifi_obytes 226#define if_imcasts if_data.ifi_imcasts 227#define if_omcasts if_data.ifi_omcasts 228#define if_iqdrops if_data.ifi_iqdrops 229#define if_oqdrops if_data.ifi_oqdrops 230#define if_noproto if_data.ifi_noproto 231#define if_lastchange if_data.ifi_lastchange 232 233/* for compatibility with other BSDs */ 234#define if_addrlist if_addrhead 235#define if_list if_link 236#define if_name(ifp) ((ifp)->if_xname) 237 238/* 239 * Locks for address lists on the network interface. 240 */ 241#define IF_ADDR_LOCK_INIT(if) rw_init(&(if)->if_addr_lock, "if_addr_lock") 242#define IF_ADDR_LOCK_DESTROY(if) rw_destroy(&(if)->if_addr_lock) 243#define IF_ADDR_WLOCK(if) rw_wlock(&(if)->if_addr_lock) 244#define IF_ADDR_WUNLOCK(if) rw_wunlock(&(if)->if_addr_lock) 245#define IF_ADDR_RLOCK(if) rw_rlock(&(if)->if_addr_lock) 246#define IF_ADDR_RUNLOCK(if) rw_runlock(&(if)->if_addr_lock) 247#define IF_ADDR_LOCK_ASSERT(if) rw_assert(&(if)->if_addr_lock, RA_LOCKED) 248#define IF_ADDR_WLOCK_ASSERT(if) rw_assert(&(if)->if_addr_lock, RA_WLOCKED) 249 250/* 251 * Function variations on locking macros intended to be used by loadable 252 * kernel modules in order to divorce them from the internals of address list 253 * locking. 254 */ 255void if_addr_rlock(struct ifnet *ifp); /* if_addrhead */ 256void if_addr_runlock(struct ifnet *ifp); /* if_addrhead */ 257void if_maddr_rlock(struct ifnet *ifp); /* if_multiaddrs */ 258void if_maddr_runlock(struct ifnet *ifp); /* if_multiaddrs */ 259 260#ifdef _KERNEL 261#ifdef _SYS_EVENTHANDLER_H_ 262/* interface link layer address change event */ 263typedef void (*iflladdr_event_handler_t)(void *, struct ifnet *); 264EVENTHANDLER_DECLARE(iflladdr_event, iflladdr_event_handler_t); 265/* interface address change event */ 266typedef void (*ifaddr_event_handler_t)(void *, struct ifnet *); 267EVENTHANDLER_DECLARE(ifaddr_event, ifaddr_event_handler_t); 268/* new interface arrival event */ 269typedef void (*ifnet_arrival_event_handler_t)(void *, struct ifnet *); 270EVENTHANDLER_DECLARE(ifnet_arrival_event, ifnet_arrival_event_handler_t); 271/* interface departure event */ 272typedef void (*ifnet_departure_event_handler_t)(void *, struct ifnet *); 273EVENTHANDLER_DECLARE(ifnet_departure_event, ifnet_departure_event_handler_t); 274/* Interface link state change event */ 275typedef void (*ifnet_link_event_handler_t)(void *, struct ifnet *, int); 276EVENTHANDLER_DECLARE(ifnet_link_event, ifnet_link_event_handler_t); 277#endif /* _SYS_EVENTHANDLER_H_ */ 278 279/* 280 * interface groups 281 */ 282struct ifg_group { 283 char ifg_group[IFNAMSIZ]; 284 u_int ifg_refcnt; 285 void *ifg_pf_kif; 286 TAILQ_HEAD(, ifg_member) ifg_members; 287 TAILQ_ENTRY(ifg_group) ifg_next; 288}; 289 290struct ifg_member { 291 TAILQ_ENTRY(ifg_member) ifgm_next; 292 struct ifnet *ifgm_ifp; 293}; 294 295struct ifg_list { 296 struct ifg_group *ifgl_group; 297 TAILQ_ENTRY(ifg_list) ifgl_next; 298}; 299 300#ifdef _SYS_EVENTHANDLER_H_ 301/* group attach event */ 302typedef void (*group_attach_event_handler_t)(void *, struct ifg_group *); 303EVENTHANDLER_DECLARE(group_attach_event, group_attach_event_handler_t); 304/* group detach event */ 305typedef void (*group_detach_event_handler_t)(void *, struct ifg_group *); 306EVENTHANDLER_DECLARE(group_detach_event, group_detach_event_handler_t); 307/* group change event */ 308typedef void (*group_change_event_handler_t)(void *, const char *); 309EVENTHANDLER_DECLARE(group_change_event, group_change_event_handler_t); 310#endif /* _SYS_EVENTHANDLER_H_ */ 311 312#define IF_AFDATA_LOCK_INIT(ifp) \ 313 rw_init(&(ifp)->if_afdata_lock, "if_afdata") 314 315#define IF_AFDATA_WLOCK(ifp) rw_wlock(&(ifp)->if_afdata_lock) 316#define IF_AFDATA_RLOCK(ifp) rw_rlock(&(ifp)->if_afdata_lock) 317#define IF_AFDATA_WUNLOCK(ifp) rw_wunlock(&(ifp)->if_afdata_lock) 318#define IF_AFDATA_RUNLOCK(ifp) rw_runlock(&(ifp)->if_afdata_lock) 319#define IF_AFDATA_LOCK(ifp) IF_AFDATA_WLOCK(ifp) 320#define IF_AFDATA_UNLOCK(ifp) IF_AFDATA_WUNLOCK(ifp) 321#define IF_AFDATA_TRYLOCK(ifp) rw_try_wlock(&(ifp)->if_afdata_lock) 322#define IF_AFDATA_DESTROY(ifp) rw_destroy(&(ifp)->if_afdata_lock) 323 324#define IF_AFDATA_LOCK_ASSERT(ifp) rw_assert(&(ifp)->if_afdata_lock, RA_LOCKED) 325#define IF_AFDATA_RLOCK_ASSERT(ifp) rw_assert(&(ifp)->if_afdata_lock, RA_RLOCKED) 326#define IF_AFDATA_WLOCK_ASSERT(ifp) rw_assert(&(ifp)->if_afdata_lock, RA_WLOCKED) 327#define IF_AFDATA_UNLOCK_ASSERT(ifp) rw_assert(&(ifp)->if_afdata_lock, RA_UNLOCKED) 328 329/* 330 * 72 was chosen below because it is the size of a TCP/IP 331 * header (40) + the minimum mss (32). 332 */ 333#define IF_MINMTU 72 334#define IF_MAXMTU 65535 335 336#define TOEDEV(ifp) ((ifp)->if_llsoftc) 337 338#endif /* _KERNEL */ 339 340/* 341 * The ifaddr structure contains information about one address 342 * of an interface. They are maintained by the different address families, 343 * are allocated and attached when an address is set, and are linked 344 * together so all addresses for an interface can be located. 345 * 346 * NOTE: a 'struct ifaddr' is always at the beginning of a larger 347 * chunk of malloc'ed memory, where we store the three addresses 348 * (ifa_addr, ifa_dstaddr and ifa_netmask) referenced here. 349 */ 350#if defined(_KERNEL) || defined(_WANT_IFADDR) 351struct ifaddr { 352 struct sockaddr *ifa_addr; /* address of interface */ 353 struct sockaddr *ifa_dstaddr; /* other end of p-to-p link */ 354#define ifa_broadaddr ifa_dstaddr /* broadcast address interface */ 355 struct sockaddr *ifa_netmask; /* used to determine subnet */ 356 struct ifnet *ifa_ifp; /* back-pointer to interface */ 357 struct carp_softc *ifa_carp; /* pointer to CARP data */ 358 TAILQ_ENTRY(ifaddr) ifa_link; /* queue macro glue */ 359 void (*ifa_rtrequest) /* check or clean routes (+ or -)'d */ 360 (int, struct rtentry *, struct rt_addrinfo *); 361 u_short ifa_flags; /* mostly rt_flags for cloning */ 362 u_int ifa_refcnt; /* references to this structure */ 363 int ifa_metric; /* cost of going out this interface */ 364 int (*ifa_claim_addr) /* check if an addr goes to this if */ 365 (struct ifaddr *, struct sockaddr *); 366 367 counter_u64_t ifa_ipackets; 368 counter_u64_t ifa_opackets; 369 counter_u64_t ifa_ibytes; 370 counter_u64_t ifa_obytes; 371}; 372#endif 373 374#ifdef _KERNEL 375#define IFA_ROUTE RTF_UP /* route installed */ 376#define IFA_RTSELF RTF_HOST /* loopback route to self installed */ 377 378/* For compatibility with other BSDs. SCTP uses it. */ 379#define ifa_list ifa_link 380 381struct ifaddr * ifa_alloc(size_t size, int flags); 382void ifa_free(struct ifaddr *ifa); 383void ifa_ref(struct ifaddr *ifa); 384#endif /* _KERNEL */ 385 386/* 387 * Multicast address structure. This is analogous to the ifaddr 388 * structure except that it keeps track of multicast addresses. 389 */ 390struct ifmultiaddr { 391 TAILQ_ENTRY(ifmultiaddr) ifma_link; /* queue macro glue */ 392 struct sockaddr *ifma_addr; /* address this membership is for */ 393 struct sockaddr *ifma_lladdr; /* link-layer translation, if any */ 394 struct ifnet *ifma_ifp; /* back-pointer to interface */ 395 u_int ifma_refcount; /* reference count */ 396 void *ifma_protospec; /* protocol-specific state, if any */ 397 struct ifmultiaddr *ifma_llifma; /* pointer to ifma for ifma_lladdr */ 398}; 399 400#ifdef _KERNEL 401 402extern struct rwlock ifnet_rwlock; 403extern struct sx ifnet_sxlock; 404 405#define IFNET_LOCK_INIT() do { \ 406 rw_init_flags(&ifnet_rwlock, "ifnet_rw", RW_RECURSE); \ 407 sx_init_flags(&ifnet_sxlock, "ifnet_sx", SX_RECURSE); \ 408} while(0) 409 410#define IFNET_WLOCK() do { \ 411 sx_xlock(&ifnet_sxlock); \ 412 rw_wlock(&ifnet_rwlock); \ 413} while (0) 414 415#define IFNET_WUNLOCK() do { \ 416 rw_wunlock(&ifnet_rwlock); \ 417 sx_xunlock(&ifnet_sxlock); \ 418} while (0) 419 420/* 421 * To assert the ifnet lock, you must know not only whether it's for read or 422 * write, but also whether it was acquired with sleep support or not. 423 */ 424#define IFNET_RLOCK_ASSERT() sx_assert(&ifnet_sxlock, SA_SLOCKED) 425#define IFNET_RLOCK_NOSLEEP_ASSERT() rw_assert(&ifnet_rwlock, RA_RLOCKED) 426#define IFNET_WLOCK_ASSERT() do { \ 427 sx_assert(&ifnet_sxlock, SA_XLOCKED); \ 428 rw_assert(&ifnet_rwlock, RA_WLOCKED); \ 429} while (0) 430 431#define IFNET_RLOCK() sx_slock(&ifnet_sxlock) 432#define IFNET_RLOCK_NOSLEEP() rw_rlock(&ifnet_rwlock) 433#define IFNET_RUNLOCK() sx_sunlock(&ifnet_sxlock) 434#define IFNET_RUNLOCK_NOSLEEP() rw_runlock(&ifnet_rwlock) 435 436/* 437 * Look up an ifnet given its index; the _ref variant also acquires a 438 * reference that must be freed using if_rele(). It is almost always a bug 439 * to call ifnet_byindex() instead if ifnet_byindex_ref(). 440 */ 441struct ifnet *ifnet_byindex(u_short idx); 442struct ifnet *ifnet_byindex_locked(u_short idx); 443struct ifnet *ifnet_byindex_ref(u_short idx); 444 445/* 446 * Given the index, ifaddr_byindex() returns the one and only 447 * link-level ifaddr for the interface. You are not supposed to use 448 * it to traverse the list of addresses associated to the interface. 449 */ 450struct ifaddr *ifaddr_byindex(u_short idx); 451 452VNET_DECLARE(struct ifnethead, ifnet); 453VNET_DECLARE(struct ifgrouphead, ifg_head); 454VNET_DECLARE(int, if_index); 455VNET_DECLARE(struct ifnet *, loif); /* first loopback interface */ 456 457#define V_ifnet VNET(ifnet) 458#define V_ifg_head VNET(ifg_head) 459#define V_if_index VNET(if_index) 460#define V_loif VNET(loif) 461 462int if_addgroup(struct ifnet *, const char *); 463int if_delgroup(struct ifnet *, const char *); 464int if_addmulti(struct ifnet *, struct sockaddr *, struct ifmultiaddr **); 465int if_allmulti(struct ifnet *, int); 466struct ifnet* if_alloc(u_char); 467void if_attach(struct ifnet *); 468void if_dead(struct ifnet *); 469int if_delmulti(struct ifnet *, struct sockaddr *); 470void if_delmulti_ifma(struct ifmultiaddr *); 471void if_detach(struct ifnet *); 472void if_vmove(struct ifnet *, struct vnet *); 473void if_purgeaddrs(struct ifnet *); 474void if_delallmulti(struct ifnet *); 475void if_down(struct ifnet *); 476struct ifmultiaddr * 477 if_findmulti(struct ifnet *, struct sockaddr *); 478void if_free(struct ifnet *); 479void if_initname(struct ifnet *, const char *, int); 480void if_link_state_change(struct ifnet *, int); 481int if_printf(struct ifnet *, const char *, ...) __printflike(2, 3); 482void if_ref(struct ifnet *); 483void if_rele(struct ifnet *); 484int if_setlladdr(struct ifnet *, const u_char *, int); 485void if_up(struct ifnet *); 486int ifioctl(struct socket *, u_long, caddr_t, struct thread *); 487int ifpromisc(struct ifnet *, int); 488struct ifnet *ifunit(const char *); 489struct ifnet *ifunit_ref(const char *); 490 491int ifa_add_loopback_route(struct ifaddr *, struct sockaddr *); 492int ifa_del_loopback_route(struct ifaddr *, struct sockaddr *); 493int ifa_switch_loopback_route(struct ifaddr *, struct sockaddr *, int fib); 494 495struct ifaddr *ifa_ifwithaddr(struct sockaddr *); 496int ifa_ifwithaddr_check(struct sockaddr *); 497struct ifaddr *ifa_ifwithbroadaddr(struct sockaddr *); 498struct ifaddr *ifa_ifwithdstaddr(struct sockaddr *); 499struct ifaddr *ifa_ifwithnet(struct sockaddr *, int); 500struct ifaddr *ifa_ifwithroute(int, struct sockaddr *, struct sockaddr *); 501struct ifaddr *ifa_ifwithroute_fib(int, struct sockaddr *, struct sockaddr *, u_int); 502struct ifaddr *ifaof_ifpforaddr(struct sockaddr *, struct ifnet *); 503int ifa_preferred(struct ifaddr *, struct ifaddr *); 504 505int if_simloop(struct ifnet *ifp, struct mbuf *m, int af, int hlen); 506 507typedef void *if_com_alloc_t(u_char type, struct ifnet *ifp); 508typedef void if_com_free_t(void *com, u_char type); 509void if_register_com_alloc(u_char type, if_com_alloc_t *a, if_com_free_t *f); 510void if_deregister_com_alloc(u_char type); 511 512#define IF_LLADDR(ifp) \ 513 LLADDR((struct sockaddr_dl *)((ifp)->if_addr->ifa_addr)) 514 515#endif /* _KERNEL */ 516#endif /* !_NET_IF_VAR_H_ */ 517