ifq.h revision 121816
1184610Salfred/* 2184610Salfred * Copyright (c) 1982, 1986, 1989, 1993 3184610Salfred * The Regents of the University of California. All rights reserved. 4184610Salfred * 5184610Salfred * Redistribution and use in source and binary forms, with or without 6184610Salfred * modification, are permitted provided that the following conditions 7184610Salfred * are met: 8184610Salfred * 1. Redistributions of source code must retain the above copyright 9184610Salfred * notice, this list of conditions and the following disclaimer. 10184610Salfred * 2. Redistributions in binary form must reproduce the above copyright 11184610Salfred * notice, this list of conditions and the following disclaimer in the 12184610Salfred * documentation and/or other materials provided with the distribution. 13184610Salfred * 3. All advertising materials mentioning features or use of this software 14184610Salfred * must display the following acknowledgement: 15184610Salfred * This product includes software developed by the University of 16184610Salfred * California, Berkeley and its contributors. 17184610Salfred * 4. Neither the name of the University nor the names of its contributors 18184610Salfred * may be used to endorse or promote products derived from this software 19184610Salfred * without specific prior written permission. 20184610Salfred * 21184610Salfred * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22184610Salfred * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23184610Salfred * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24184610Salfred * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25184610Salfred * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26184610Salfred * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27184610Salfred * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28184610Salfred * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29184610Salfred * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30184610Salfred * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31184610Salfred * SUCH DAMAGE. 32184610Salfred * 33184610Salfred * From: @(#)if.h 8.1 (Berkeley) 6/10/93 34184610Salfred * $FreeBSD: head/sys/net/if_var.h 121816 2003-10-31 18:32:15Z brooks $ 35184610Salfred */ 36184610Salfred 37184610Salfred#ifndef _NET_IF_VAR_H_ 38184610Salfred#define _NET_IF_VAR_H_ 39184610Salfred 40184610Salfred/* 41184610Salfred * Structures defining a network interface, providing a packet 42184610Salfred * transport mechanism (ala level 0 of the PUP protocols). 43184610Salfred * 44184610Salfred * Each interface accepts output datagrams of a specified maximum 45184610Salfred * length, and provides higher level routines with input datagrams 46184610Salfred * received from its medium. 47184610Salfred * 48184610Salfred * Output occurs when the routine if_output is called, with three parameters: 49184610Salfred * (*ifp->if_output)(ifp, m, dst, rt) 50184610Salfred * Here m is the mbuf chain to be sent and dst is the destination address. 51184610Salfred * The output routine encapsulates the supplied datagram if necessary, 52184610Salfred * and then transmits it on its medium. 53184610Salfred * 54184610Salfred * On input, each interface unwraps the data received by it, and either 55184610Salfred * places it on the input queue of an internetwork datagram routine 56184610Salfred * and posts the associated software interrupt, or passes the datagram to a raw 57184610Salfred * packet input routine. 58184610Salfred * 59184610Salfred * Routines exist for locating interfaces by their addresses 60184610Salfred * or for locating an interface on a certain network, as well as more general 61184610Salfred * routing and gateway routines maintaining information used to locate 62184610Salfred * interfaces. These routines live in the files if.c and route.c 63184610Salfred */ 64184610Salfred 65184610Salfred#ifdef __STDC__ 66184610Salfred/* 67184610Salfred * Forward structure declarations for function prototypes [sic]. 68184610Salfred */ 69184610Salfredstruct mbuf; 70184610Salfredstruct thread; 71184610Salfredstruct rtentry; 72184610Salfredstruct rt_addrinfo; 73184610Salfredstruct socket; 74184610Salfredstruct ether_header; 75184610Salfred#endif 76184610Salfred 77184610Salfred#include <sys/_label.h> /* struct label */ 78184610Salfred#include <sys/queue.h> /* get TAILQ macros */ 79184610Salfred 80184610Salfred#ifdef _KERNEL 81184610Salfred#include <sys/mbuf.h> 82184610Salfred#endif /* _KERNEL */ 83184610Salfred#include <sys/lock.h> /* XXX */ 84184610Salfred#include <sys/mutex.h> /* XXX */ 85184610Salfred#include <sys/event.h> /* XXX */ 86184610Salfred 87184610Salfred#define IF_DUNIT_NONE -1 88184610Salfred 89184610SalfredTAILQ_HEAD(ifnethead, ifnet); /* we use TAILQs so that the order of */ 90184610SalfredTAILQ_HEAD(ifaddrhead, ifaddr); /* instantiation is preserved in the list */ 91184610SalfredTAILQ_HEAD(ifprefixhead, ifprefix); 92184610SalfredTAILQ_HEAD(ifmultihead, ifmultiaddr); 93184610Salfred 94184610Salfred/* 95184610Salfred * Structure defining a queue for a network interface. 96184610Salfred */ 97184610Salfredstruct ifqueue { 98184610Salfred struct mbuf *ifq_head; 99184610Salfred struct mbuf *ifq_tail; 100184610Salfred int ifq_len; 101184610Salfred int ifq_maxlen; 102184610Salfred int ifq_drops; 103184610Salfred struct mtx ifq_mtx; 104184610Salfred}; 105184610Salfred 106184610Salfred/* 107184610Salfred * Structure defining a network interface. 108184610Salfred * 109184610Salfred * (Would like to call this struct ``if'', but C isn't PL/1.) 110184610Salfred */ 111184610Salfred 112184610Salfred/* 113184610Salfred * NB: For FreeBSD, it is assumed that each NIC driver's softc starts with 114184610Salfred * one of these structures, typically held within an arpcom structure. 115184610Salfred * 116184610Salfred * struct <foo>_softc { 117184610Salfred * struct arpcom { 118184610Salfred * struct ifnet ac_if; 119184610Salfred * ... 120184610Salfred * } <arpcom> ; 121184610Salfred * ... 122184610Salfred * }; 123184610Salfred * 124184610Salfred * The assumption is used in a number of places, including many 125184610Salfred * files in sys/net, device drivers, and sys/dev/mii.c:miibus_attach(). 126184610Salfred * 127184610Salfred * Unfortunately devices' softc are opaque, so we depend on this layout 128184610Salfred * to locate the struct ifnet from the softc in the generic code. 129184610Salfred * 130184610Salfred */ 131184610Salfredstruct ifnet { 132184610Salfred void *if_softc; /* pointer to driver state */ 133184610Salfred TAILQ_ENTRY(ifnet) if_link; /* all struct ifnets are chained */ 134184610Salfred char if_xname[IFNAMSIZ]; /* external name (name + unit) */ 135184610Salfred const char *if_dname; /* driver name */ 136184610Salfred int if_dunit; /* unit or IF_DUNIT_NONE */ 137184610Salfred struct ifaddrhead if_addrhead; /* linked list of addresses per if */ 138184610Salfred struct klist if_klist; /* events attached to this if */ 139184610Salfred int if_pcount; /* number of promiscuous listeners */ 140184610Salfred struct bpf_if *if_bpf; /* packet filter structure */ 141184610Salfred u_short if_index; /* numeric abbreviation for this if */ 142184610Salfred short if_timer; /* time 'til if_watchdog called */ 143184610Salfred u_short if_nvlans; /* number of active vlans */ 144184610Salfred int if_flags; /* up/down, broadcast, etc. */ 145184610Salfred int if_capabilities; /* interface capabilities */ 146184610Salfred int if_capenable; /* enabled features */ 147184610Salfred int if_ipending; /* interrupts pending */ 148184610Salfred void *if_linkmib; /* link-type-specific MIB data */ 149184610Salfred size_t if_linkmiblen; /* length of above data */ 150184610Salfred struct if_data if_data; 151184610Salfred struct ifmultihead if_multiaddrs; /* multicast addresses configured */ 152184610Salfred int if_amcount; /* number of all-multicast requests */ 153184610Salfred/* procedure handles */ 154184610Salfred int (*if_output) /* output routine (enqueue) */ 155184610Salfred (struct ifnet *, struct mbuf *, struct sockaddr *, 156184610Salfred struct rtentry *); 157184610Salfred void (*if_input) /* input routine (from h/w driver) */ 158184610Salfred (struct ifnet *, struct mbuf *); 159184610Salfred void (*if_start) /* initiate output routine */ 160184610Salfred (struct ifnet *); 161184610Salfred int (*if_done) /* output complete routine */ 162184610Salfred (struct ifnet *); /* (XXX not used; fake prototype) */ 163184610Salfred int (*if_ioctl) /* ioctl routine */ 164184610Salfred (struct ifnet *, u_long, caddr_t); 165184610Salfred void (*if_watchdog) /* timer routine */ 166184610Salfred (struct ifnet *); 167184610Salfred int (*if_poll_recv) /* polled receive routine */ 168184610Salfred (struct ifnet *, int *); 169184610Salfred int (*if_poll_xmit) /* polled transmit routine */ 170184610Salfred (struct ifnet *, int *); 171184610Salfred void (*if_poll_intren) /* polled interrupt reenable routine */ 172184610Salfred (struct ifnet *); 173184610Salfred void (*if_poll_slowinput) /* input routine for slow devices */ 174184610Salfred (struct ifnet *, struct mbuf *); 175184610Salfred void (*if_init) /* Init routine */ 176184610Salfred (void *); 177184610Salfred int (*if_resolvemulti) /* validate/resolve multicast */ 178184610Salfred (struct ifnet *, struct sockaddr **, struct sockaddr *); 179184610Salfred struct ifqueue if_snd; /* output queue */ 180184610Salfred struct ifqueue *if_poll_slowq; /* input queue for slow devices */ 181184610Salfred struct ifprefixhead if_prefixhead; /* list of prefixes per if */ 182184610Salfred u_int8_t *if_broadcastaddr; /* linklevel broadcast bytestring */ 183184610Salfred struct label if_label; /* interface MAC label */ 184184610Salfred 185184610Salfred void *if_afdata[AF_MAX]; 186184610Salfred int if_afdata_initialized; 187184610Salfred struct mtx if_afdata_mtx; 188184610Salfred}; 189184610Salfred 190184610Salfredtypedef void if_init_f_t(void *); 191184610Salfred 192184610Salfred#define if_mtu if_data.ifi_mtu 193184610Salfred#define if_type if_data.ifi_type 194184610Salfred#define if_physical if_data.ifi_physical 195184610Salfred#define if_addrlen if_data.ifi_addrlen 196184610Salfred#define if_hdrlen if_data.ifi_hdrlen 197184610Salfred#define if_metric if_data.ifi_metric 198184610Salfred#define if_baudrate if_data.ifi_baudrate 199184610Salfred#define if_hwassist if_data.ifi_hwassist 200184610Salfred#define if_ipackets if_data.ifi_ipackets 201184610Salfred#define if_ierrors if_data.ifi_ierrors 202184610Salfred#define if_opackets if_data.ifi_opackets 203184610Salfred#define if_oerrors if_data.ifi_oerrors 204184610Salfred#define if_collisions if_data.ifi_collisions 205184610Salfred#define if_ibytes if_data.ifi_ibytes 206184610Salfred#define if_obytes if_data.ifi_obytes 207184610Salfred#define if_imcasts if_data.ifi_imcasts 208184610Salfred#define if_omcasts if_data.ifi_omcasts 209184610Salfred#define if_iqdrops if_data.ifi_iqdrops 210184610Salfred#define if_noproto if_data.ifi_noproto 211184610Salfred#define if_lastchange if_data.ifi_lastchange 212184610Salfred#define if_recvquota if_data.ifi_recvquota 213184610Salfred#define if_xmitquota if_data.ifi_xmitquota 214184610Salfred#define if_rawoutput(if, m, sa) if_output(if, m, sa, (struct rtentry *)0) 215184610Salfred 216184610Salfred/* for compatibility with other BSDs */ 217184610Salfred#define if_addrlist if_addrhead 218184610Salfred#define if_list if_link 219184610Salfred 220184610Salfred/* 221184610Salfred * Bit values in if_ipending 222184610Salfred */ 223184610Salfred#define IFI_RECV 1 /* I want to receive */ 224184610Salfred#define IFI_XMIT 2 /* I want to transmit */ 225184610Salfred 226184610Salfred/* 227184610Salfred * Output queues (ifp->if_snd) and slow device input queues (*ifp->if_slowq) 228184610Salfred * are queues of messages stored on ifqueue structures 229184610Salfred * (defined above). Entries are added to and deleted from these structures 230184610Salfred * by these macros, which should be called with ipl raised to splimp(). 231184610Salfred */ 232184610Salfred#define IF_LOCK(ifq) mtx_lock(&(ifq)->ifq_mtx) 233184610Salfred#define IF_UNLOCK(ifq) mtx_unlock(&(ifq)->ifq_mtx) 234184610Salfred#define _IF_QFULL(ifq) ((ifq)->ifq_len >= (ifq)->ifq_maxlen) 235184610Salfred#define _IF_DROP(ifq) ((ifq)->ifq_drops++) 236184610Salfred#define _IF_QLEN(ifq) ((ifq)->ifq_len) 237184610Salfred 238184610Salfred#define _IF_ENQUEUE(ifq, m) do { \ 239184610Salfred (m)->m_nextpkt = NULL; \ 240184610Salfred if ((ifq)->ifq_tail == NULL) \ 241184610Salfred (ifq)->ifq_head = m; \ 242184610Salfred else \ 243184610Salfred (ifq)->ifq_tail->m_nextpkt = m; \ 244184610Salfred (ifq)->ifq_tail = m; \ 245184610Salfred (ifq)->ifq_len++; \ 246184610Salfred} while (0) 247184610Salfred 248184610Salfred#define IF_ENQUEUE(ifq, m) do { \ 249184610Salfred IF_LOCK(ifq); \ 250184610Salfred _IF_ENQUEUE(ifq, m); \ 251184610Salfred IF_UNLOCK(ifq); \ 252184610Salfred} while (0) 253184610Salfred 254184610Salfred#define _IF_PREPEND(ifq, m) do { \ 255184610Salfred (m)->m_nextpkt = (ifq)->ifq_head; \ 256184610Salfred if ((ifq)->ifq_tail == NULL) \ 257184610Salfred (ifq)->ifq_tail = (m); \ 258184610Salfred (ifq)->ifq_head = (m); \ 259184610Salfred (ifq)->ifq_len++; \ 260184610Salfred} while (0) 261184610Salfred 262184610Salfred#define IF_PREPEND(ifq, m) do { \ 263184610Salfred IF_LOCK(ifq); \ 264184610Salfred _IF_PREPEND(ifq, m); \ 265184610Salfred IF_UNLOCK(ifq); \ 266184610Salfred} while (0) 267184610Salfred 268184610Salfred#define _IF_DEQUEUE(ifq, m) do { \ 269184610Salfred (m) = (ifq)->ifq_head; \ 270184610Salfred if (m) { \ 271184610Salfred if (((ifq)->ifq_head = (m)->m_nextpkt) == 0) \ 272184610Salfred (ifq)->ifq_tail = NULL; \ 273184610Salfred (m)->m_nextpkt = NULL; \ 274184610Salfred (ifq)->ifq_len--; \ 275184610Salfred } \ 276184610Salfred} while (0) 277184610Salfred 278184610Salfred#define IF_DEQUEUE(ifq, m) do { \ 279184610Salfred IF_LOCK(ifq); \ 280184610Salfred _IF_DEQUEUE(ifq, m); \ 281184610Salfred IF_UNLOCK(ifq); \ 282184610Salfred} while (0) 283184610Salfred 284184610Salfred#define IF_DRAIN(ifq) do { \ 285184610Salfred struct mbuf *m; \ 286184610Salfred IF_LOCK(ifq); \ 287184610Salfred for (;;) { \ 288184610Salfred _IF_DEQUEUE(ifq, m); \ 289184610Salfred if (m == NULL) \ 290184610Salfred break; \ 291184610Salfred m_freem(m); \ 292184610Salfred } \ 293184610Salfred IF_UNLOCK(ifq); \ 294184610Salfred} while (0) 295184610Salfred 296184610Salfred#ifdef _KERNEL 297184610Salfred#define IF_AFDATA_LOCK_INIT(ifp) \ 298184610Salfred mtx_init(&(ifp)->if_afdata_mtx, "if_afdata", NULL, MTX_DEF) 299184610Salfred#define IF_AFDATA_LOCK(ifp) mtx_lock(&(ifp)->if_afdata_mtx) 300184610Salfred#define IF_AFDATA_TRYLOCK(ifp) mtx_trylock(&(ifp)->if_afdata_mtx) 301184610Salfred#define IF_AFDATA_UNLOCK(ifp) mtx_unlock(&(ifp)->if_afdata_mtx) 302184610Salfred#define IF_AFDATA_DESTROY(ifp) mtx_destroy(&(ifp)->if_afdata_mtx) 303184610Salfred 304184610Salfred#define IF_HANDOFF(ifq, m, ifp) if_handoff(ifq, m, ifp, 0) 305184610Salfred#define IF_HANDOFF_ADJ(ifq, m, ifp, adj) if_handoff(ifq, m, ifp, adj) 306184610Salfred 307184610Salfredstatic __inline int 308184610Salfredif_handoff(struct ifqueue *ifq, struct mbuf *m, struct ifnet *ifp, int adjust) 309184610Salfred{ 310184610Salfred int active = 0; 311184610Salfred 312184610Salfred IF_LOCK(ifq); 313184610Salfred if (_IF_QFULL(ifq)) { 314184610Salfred _IF_DROP(ifq); 315184610Salfred IF_UNLOCK(ifq); 316184610Salfred m_freem(m); 317184610Salfred return (0); 318184610Salfred } 319184610Salfred if (ifp != NULL) { 320184610Salfred ifp->if_obytes += m->m_pkthdr.len + adjust; 321184610Salfred if (m->m_flags & M_MCAST) 322184610Salfred ifp->if_omcasts++; 323184610Salfred active = ifp->if_flags & IFF_OACTIVE; 324184610Salfred } 325184610Salfred _IF_ENQUEUE(ifq, m); 326184610Salfred IF_UNLOCK(ifq); 327184610Salfred if (ifp != NULL && !active) 328184610Salfred (*ifp->if_start)(ifp); 329184610Salfred return (1); 330184610Salfred} 331184610Salfred 332184610Salfred/* 333184610Salfred * 72 was chosen below because it is the size of a TCP/IP 334184610Salfred * header (40) + the minimum mss (32). 335184610Salfred */ 336184610Salfred#define IF_MINMTU 72 337184610Salfred#define IF_MAXMTU 65535 338184610Salfred 339184610Salfred#endif /* _KERNEL */ 340184610Salfred 341184610Salfred/* 342184610Salfred * The ifaddr structure contains information about one address 343184610Salfred * of an interface. They are maintained by the different address families, 344184610Salfred * are allocated and attached when an address is set, and are linked 345184610Salfred * together so all addresses for an interface can be located. 346184610Salfred */ 347184610Salfredstruct ifaddr { 348184610Salfred struct sockaddr *ifa_addr; /* address of interface */ 349184610Salfred struct sockaddr *ifa_dstaddr; /* other end of p-to-p link */ 350184610Salfred#define ifa_broadaddr ifa_dstaddr /* broadcast address interface */ 351184610Salfred struct sockaddr *ifa_netmask; /* used to determine subnet */ 352184610Salfred struct if_data if_data; /* not all members are meaningful */ 353184610Salfred struct ifnet *ifa_ifp; /* back-pointer to interface */ 354184610Salfred TAILQ_ENTRY(ifaddr) ifa_link; /* queue macro glue */ 355 void (*ifa_rtrequest) /* check or clean routes (+ or -)'d */ 356 (int, struct rtentry *, struct rt_addrinfo *); 357 u_short ifa_flags; /* mostly rt_flags for cloning */ 358 u_int ifa_refcnt; /* references to this structure */ 359 int ifa_metric; /* cost of going out this interface */ 360#ifdef notdef 361 struct rtentry *ifa_rt; /* XXXX for ROUTETOIF ????? */ 362#endif 363 int (*ifa_claim_addr) /* check if an addr goes to this if */ 364 (struct ifaddr *, struct sockaddr *); 365 struct mtx ifa_mtx; 366}; 367#define IFA_ROUTE RTF_UP /* route installed */ 368 369/* for compatibility with other BSDs */ 370#define ifa_list ifa_link 371 372#define IFA_LOCK_INIT(ifa) \ 373 mtx_init(&(ifa)->ifa_mtx, "ifaddr", NULL, MTX_DEF) 374#define IFA_LOCK(ifa) mtx_lock(&(ifa)->ifa_mtx) 375#define IFA_UNLOCK(ifa) mtx_unlock(&(ifa)->ifa_mtx) 376#define IFA_DESTROY(ifa) mtx_destroy(&(ifa)->ifa_mtx) 377 378/* 379 * The prefix structure contains information about one prefix 380 * of an interface. They are maintained by the different address families, 381 * are allocated and attached when a prefix or an address is set, 382 * and are linked together so all prefixes for an interface can be located. 383 */ 384struct ifprefix { 385 struct sockaddr *ifpr_prefix; /* prefix of interface */ 386 struct ifnet *ifpr_ifp; /* back-pointer to interface */ 387 TAILQ_ENTRY(ifprefix) ifpr_list; /* queue macro glue */ 388 u_char ifpr_plen; /* prefix length in bits */ 389 u_char ifpr_type; /* protocol dependent prefix type */ 390}; 391 392/* 393 * Multicast address structure. This is analogous to the ifaddr 394 * structure except that it keeps track of multicast addresses. 395 * Also, the reference count here is a count of requests for this 396 * address, not a count of pointers to this structure. 397 */ 398struct ifmultiaddr { 399 TAILQ_ENTRY(ifmultiaddr) ifma_link; /* queue macro glue */ 400 struct sockaddr *ifma_addr; /* address this membership is for */ 401 struct sockaddr *ifma_lladdr; /* link-layer translation, if any */ 402 struct ifnet *ifma_ifp; /* back-pointer to interface */ 403 u_int ifma_refcount; /* reference count */ 404 void *ifma_protospec; /* protocol-specific state, if any */ 405}; 406 407#ifdef _KERNEL 408#define IFAFREE(ifa) \ 409 do { \ 410 IFA_LOCK(ifa); \ 411 KASSERT((ifa)->ifa_refcnt > 0, \ 412 ("ifa %p !(ifa_refcnt > 0)", ifa)); \ 413 if (--(ifa)->ifa_refcnt == 0) { \ 414 IFA_DESTROY(ifa); \ 415 free(ifa, M_IFADDR); \ 416 } else \ 417 IFA_UNLOCK(ifa); \ 418 } while (0) 419 420#define IFAREF(ifa) \ 421 do { \ 422 IFA_LOCK(ifa); \ 423 ++(ifa)->ifa_refcnt; \ 424 IFA_UNLOCK(ifa); \ 425 } while (0) 426 427extern struct mtx ifnet_lock; 428#define IFNET_LOCK_INIT() \ 429 mtx_init(&ifnet_lock, "ifnet", NULL, MTX_DEF | MTX_RECURSE) 430#define IFNET_WLOCK() mtx_lock(&ifnet_lock) 431#define IFNET_WUNLOCK() mtx_unlock(&ifnet_lock) 432#define IFNET_RLOCK() IFNET_WLOCK() 433#define IFNET_RUNLOCK() IFNET_WUNLOCK() 434 435struct ifindex_entry { 436 struct ifnet *ife_ifnet; 437 struct ifaddr *ife_ifnet_addr; 438 dev_t ife_dev; 439}; 440 441#define ifnet_byindex(idx) ifindex_table[(idx)].ife_ifnet 442#define ifaddr_byindex(idx) ifindex_table[(idx)].ife_ifnet_addr 443#define ifdev_byindex(idx) ifindex_table[(idx)].ife_dev 444 445extern struct ifnethead ifnet; 446extern struct ifindex_entry *ifindex_table; 447extern int ifqmaxlen; 448extern struct ifnet *loif; /* first loopback interface */ 449extern int if_index; 450 451int if_addmulti(struct ifnet *, struct sockaddr *, struct ifmultiaddr **); 452int if_allmulti(struct ifnet *, int); 453void if_attach(struct ifnet *); 454int if_delmulti(struct ifnet *, struct sockaddr *); 455void if_detach(struct ifnet *); 456void if_down(struct ifnet *); 457void if_initname(struct ifnet *, const char *, int); 458int if_printf(struct ifnet *, const char *, ...) __printflike(2, 3); 459void if_route(struct ifnet *, int flag, int fam); 460int if_setlladdr(struct ifnet *, const u_char *, int); 461void if_unroute(struct ifnet *, int flag, int fam); 462void if_up(struct ifnet *); 463/*void ifinit(void);*/ /* declared in systm.h for main() */ 464int ifioctl(struct socket *, u_long, caddr_t, struct thread *); 465int ifpromisc(struct ifnet *, int); 466struct ifnet *ifunit(const char *); 467struct ifnet *if_withname(struct sockaddr *); 468 469int if_poll_recv_slow(struct ifnet *ifp, int *quotap); 470void if_poll_xmit_slow(struct ifnet *ifp, int *quotap); 471void if_poll_throttle(void); 472void if_poll_unthrottle(void *); 473void if_poll_init(void); 474void if_poll(void); 475 476struct ifaddr *ifa_ifwithaddr(struct sockaddr *); 477struct ifaddr *ifa_ifwithdstaddr(struct sockaddr *); 478struct ifaddr *ifa_ifwithnet(struct sockaddr *); 479struct ifaddr *ifa_ifwithroute(int, struct sockaddr *, struct sockaddr *); 480struct ifaddr *ifaof_ifpforaddr(struct sockaddr *, struct ifnet *); 481 482struct ifmultiaddr *ifmaof_ifpforaddr(struct sockaddr *, struct ifnet *); 483int if_simloop(struct ifnet *ifp, struct mbuf *m, int af, int hlen); 484 485void if_clone_attach(struct if_clone *); 486void if_clone_detach(struct if_clone *); 487 488int if_clone_create(char *, int); 489int if_clone_destroy(const char *); 490 491#define IF_LLADDR(ifp) \ 492 LLADDR((struct sockaddr_dl *) ifaddr_byindex((ifp)->if_index)->ifa_addr) 493 494#ifdef DEVICE_POLLING 495enum poll_cmd { POLL_ONLY, POLL_AND_CHECK_STATUS, POLL_DEREGISTER }; 496 497typedef void poll_handler_t(struct ifnet *ifp, enum poll_cmd cmd, int count); 498int ether_poll_register(poll_handler_t *h, struct ifnet *ifp); 499int ether_poll_deregister(struct ifnet *ifp); 500#endif /* DEVICE_POLLING */ 501 502#endif /* _KERNEL */ 503 504#endif /* !_NET_IF_VAR_H_ */ 505