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 * 3. All advertising materials mentioning features or use of this software 14 * must display the following acknowledgement: 15 * This product includes software developed by the University of 16 * California, Berkeley and its contributors. 17 * 4. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * From: @(#)if.h 8.1 (Berkeley) 6/10/93 34 * $FreeBSD: src/sys/net/if_var.h,v 1.18.2.16 2003/04/15 18:11:19 fjoe Exp $ 35 * $DragonFly: src/sys/net/if_var.h,v 1.49 2008/05/02 07:40:32 sephe Exp $ 36 */ 37 38 #ifndef _NET_IF_VAR_H_ 39 #define _NET_IF_VAR_H_ 40 41 #ifndef _SYS_SERIALIZE_H_ 42 #include <sys/serialize.h> 43 #endif 44 #ifndef _NET_IF_H_ 45 #include <net/if.h> 46 #endif 47 48 /* 49 * Structures defining a network interface, providing a packet 50 * transport mechanism (ala level 0 of the PUP protocols). 51 * 52 * Each interface accepts output datagrams of a specified maximum 53 * length, and provides higher level routines with input datagrams 54 * received from its medium. 55 * 56 * Output occurs when the routine if_output is called, with four parameters: 57 * ifp->if_output(ifp, m, dst, rt) 58 * Here m is the mbuf chain to be sent and dst is the destination address. 59 * The output routine encapsulates the supplied datagram if necessary, 60 * and then transmits it on its medium. 61 * 62 * On input, each interface unwraps the data received by it, and either 63 * places it on the input queue of a internetwork datagram routine 64 * and posts the associated software interrupt, or passes the datagram to 65 * the routine if_input. It is called with the mbuf chain as parameter: 66 * ifp->if_input(ifp, m) 67 * The input routine removes the protocol dependent header if necessary. 68 * 69 * Routines exist for locating interfaces by their addresses 70 * or for locating a interface on a certain network, as well as more general 71 * routing and gateway routines maintaining information used to locate 72 * interfaces. These routines live in the files if.c and route.c 73 */ 74 75 /* 76 * Forward structure declarations for function prototypes [sic]. 77 */ 78 struct mbuf; 79 struct mbuf_chain; 80 struct proc; 81 struct rtentry; 82 struct rt_addrinfo; 83 struct socket; 84 struct ether_header; 85 struct carp_if; 86 struct ucred; 87 struct lwkt_serialize; 88 struct ifaddr_container; 89 struct ifaddr; 90 struct lwkt_port; 91 92 #include <sys/queue.h> /* get TAILQ macros */ 93 94 #include <net/altq/if_altq.h> 95 96 #ifdef _KERNEL 97 #include <sys/eventhandler.h> 98 #include <sys/mbuf.h> 99 #include <sys/systm.h> /* XXX */ 100 #include <sys/thread2.h> 101 #endif /* _KERNEL */ 102 103 #define IF_DUNIT_NONE -1 104 105 TAILQ_HEAD(ifnethead, ifnet); /* we use TAILQs so that the order of */ 106 TAILQ_HEAD(ifaddrhead, ifaddr_container); /* instantiation is preserved in the list */ 107 TAILQ_HEAD(ifprefixhead, ifprefix); 108 LIST_HEAD(ifmultihead, ifmultiaddr); 109 110 /* 111 * Structure defining a queue for a network interface. 112 */ 113 struct ifqueue { 114 struct mbuf *ifq_head; 115 struct mbuf *ifq_tail; 116 int ifq_len; 117 int ifq_maxlen; 118 int ifq_drops; 119 }; 120 121 /* 122 * Note of DEVICE_POLLING 123 * 1) Any file(*.c) that depends on DEVICE_POLLING supports in this 124 * file should include opt_polling.h at its beginning. 125 * 2) When struct changes, which are conditioned by DEVICE_POLLING, 126 * are to be introduced, please keep the struct's size and layout 127 * same, no matter whether DEVICE_POLLING is defined or not. 128 * See ifnet.if_poll and ifnet.if_poll_unused for example. 129 */ 130 131 #ifdef DEVICE_POLLING 132 enum poll_cmd { POLL_ONLY, POLL_AND_CHECK_STATUS, POLL_DEREGISTER, 133 POLL_REGISTER }; 134 #endif 135 136 /* 137 * Structure defining a network interface. 138 * 139 * (Would like to call this struct ``if'', but C isn't PL/1.) 140 */ 141 142 /* 143 * NB: For FreeBSD, it is assumed that each NIC driver's softc starts with 144 * one of these structures, typically held within an arpcom structure. 145 * 146 * struct <foo>_softc { 147 * struct arpcom { 148 * struct ifnet ac_if; 149 * ... 150 * } <arpcom> ; 151 * ... 152 * }; 153 * 154 * The assumption is used in a number of places, including many 155 * files in sys/net, device drivers, and sys/dev/mii.c:miibus_attach(). 156 * 157 * Unfortunately devices' softc are opaque, so we depend on this layout 158 * to locate the struct ifnet from the softc in the generic code. 159 * 160 * MPSAFE NOTES: 161 * 162 * ifnet and its related packet queues are protected by if_serializer. 163 * Callers of if_output, if_ioctl, if_start, if_watchdog, if_init, 164 * if_resolvemulti, and if_poll hold if_serializer. Device drivers usually 165 * use the same serializer for their interrupt but this is not required. 166 * However, the device driver must be holding if_serializer when it 167 * calls if_input. Note that the serializer may be temporarily released 168 * within if_input to avoid a deadlock (e.g. when fast-forwarding or 169 * bridging packets between interfaces). 170 * 171 * If a device driver installs the same serializer for its interrupt 172 * as for ifnet, then the driver only really needs to worry about further 173 * serialization in timeout based entry points. All other entry points 174 * will already be serialized. Older ISA drivers still using the old 175 * interrupt infrastructure will have to obtain and release the serializer 176 * in their interrupt routine themselves. 177 */ 178 struct ifnet { 179 void *if_softc; /* pointer to driver state */ 180 TAILQ_ENTRY(ifnet) if_link; /* all struct ifnets are chained */ 181 char if_xname[IFNAMSIZ]; /* external name (name + unit) */ 182 const char *if_dname; /* driver name */ 183 int if_dunit; /* unit or IF_DUNIT_NONE */ 184 void *if_vlantrunks; /* vlan trunks */ 185 struct ifaddrhead *if_addrheads; /* linked lists of addresses per if */ 186 int if_pcount; /* number of promiscuous listeners */ 187 struct carp_if *if_carp; /* carp interface structure */ 188 struct bpf_if *if_bpf; /* packet filter structure */ 189 u_short if_index; /* numeric abbreviation for this if */ 190 short if_timer; /* time 'til if_watchdog called */ 191 int if_flags; /* up/down, broadcast, etc. */ 192 int if_capabilities; /* interface capabilities */ 193 int if_capenable; /* enabled features */ 194 void *if_linkmib; /* link-type-specific MIB data */ 195 size_t if_linkmiblen; /* length of above data */ 196 struct if_data if_data; 197 struct ifmultihead if_multiaddrs; /* multicast addresses configured */ 198 int if_amcount; /* number of all-multicast requests */ 199 /* procedure handles */ 200 int (*if_output) /* output routine (enqueue) */ 201 (struct ifnet *, struct mbuf *, struct sockaddr *, 202 struct rtentry *); 203 void (*if_input) /* input routine from hardware driver */ 204 (struct ifnet *, struct mbuf *); 205 void (*if_start) /* initiate output routine */ 206 (struct ifnet *); 207 int (*if_ioctl) /* ioctl routine */ 208 (struct ifnet *, u_long, caddr_t, struct ucred *); 209 void (*if_watchdog) /* timer routine */ 210 (struct ifnet *); 211 void (*if_init) /* Init routine */ 212 (void *); 213 int (*if_resolvemulti) /* validate/resolve multicast */ 214 (struct ifnet *, struct sockaddr **, struct sockaddr *); 215 #ifdef DEVICE_POLLING 216 void (*if_poll) /* IFF_POLLING support */ 217 (struct ifnet *, enum poll_cmd, int); 218 int if_poll_cpuid; 219 #else 220 /* Place holders */ 221 void (*if_poll_unused)(void); 222 int if_poll_cpuid_used; 223 #endif 224 struct ifaltq if_snd; /* output queue (includes altq) */ 225 struct ifprefixhead if_prefixhead; /* list of prefixes per if */ 226 const uint8_t *if_broadcastaddr; 227 void *if_bridge; /* bridge glue */ 228 void *if_afdata[AF_MAX]; 229 struct ifaddr *if_lladdr; 230 struct lwkt_serialize *if_serializer; /* serializer or MP lock */ 231 struct lwkt_serialize if_default_serializer; /* if not supplied */ 232 }; 233 typedef void if_init_f_t (void *); 234 235 #define if_mtu if_data.ifi_mtu 236 #define if_type if_data.ifi_type 237 #define if_physical if_data.ifi_physical 238 #define if_addrlen if_data.ifi_addrlen 239 #define if_hdrlen if_data.ifi_hdrlen 240 #define if_metric if_data.ifi_metric 241 #define if_link_state if_data.ifi_link_state 242 #define if_baudrate if_data.ifi_baudrate 243 #define if_hwassist if_data.ifi_hwassist 244 #define if_ipackets if_data.ifi_ipackets 245 #define if_ierrors if_data.ifi_ierrors 246 #define if_opackets if_data.ifi_opackets 247 #define if_oerrors if_data.ifi_oerrors 248 #define if_collisions if_data.ifi_collisions 249 #define if_ibytes if_data.ifi_ibytes 250 #define if_obytes if_data.ifi_obytes 251 #define if_imcasts if_data.ifi_imcasts 252 #define if_omcasts if_data.ifi_omcasts 253 #define if_iqdrops if_data.ifi_iqdrops 254 #define if_noproto if_data.ifi_noproto 255 #define if_lastchange if_data.ifi_lastchange 256 #define if_recvquota if_data.ifi_recvquota 257 #define if_xmitquota if_data.ifi_xmitquota 258 #define if_rawoutput(if, m, sa) if_output(if, m, sa, (struct rtentry *)0) 259 260 /* for compatibility with other BSDs */ 261 #define if_list if_link 262 263 264 /* 265 * Output queues (ifp->if_snd) and slow device input queues (*ifp->if_slowq) 266 * are queues of messages stored on ifqueue structures 267 * (defined above). Entries are added to and deleted from these structures 268 * by these macros, which should be called with ipl raised to splimp(). 269 */ 270 #define IF_QFULL(ifq) ((ifq)->ifq_len >= (ifq)->ifq_maxlen) 271 #define IF_DROP(ifq) ((ifq)->ifq_drops++) 272 #define IF_QLEN(ifq) ((ifq)->ifq_len) 273 #define IF_QEMPTY(ifq) (IF_QLEN(ifq) == 0) 274 #define IF_ENQUEUE(ifq, m) do { \ 275 (m)->m_nextpkt = 0; \ 276 if ((ifq)->ifq_tail == 0) \ 277 (ifq)->ifq_head = m; \ 278 else \ 279 (ifq)->ifq_tail->m_nextpkt = m; \ 280 (ifq)->ifq_tail = m; \ 281 (ifq)->ifq_len++; \ 282 } while (0) 283 #define IF_PREPEND(ifq, m) do { \ 284 (m)->m_nextpkt = (ifq)->ifq_head; \ 285 if ((ifq)->ifq_tail == 0) \ 286 (ifq)->ifq_tail = (m); \ 287 (ifq)->ifq_head = (m); \ 288 (ifq)->ifq_len++; \ 289 } while (0) 290 #define IF_DEQUEUE(ifq, m) do { \ 291 (m) = (ifq)->ifq_head; \ 292 if (m) { \ 293 if (((ifq)->ifq_head = (m)->m_nextpkt) == 0) \ 294 (ifq)->ifq_tail = 0; \ 295 (m)->m_nextpkt = 0; \ 296 (ifq)->ifq_len--; \ 297 } \ 298 } while (0) 299 300 #define IF_POLL(ifq, m) ((m) = (ifq)->ifq_head) 301 302 #define IF_DRAIN(ifq) do { \ 303 struct mbuf *m; \ 304 while (1) { \ 305 IF_DEQUEUE(ifq, m); \ 306 if (m == NULL) \ 307 break; \ 308 m_freem(m); \ 309 } \ 310 } while (0) 311 312 #ifdef _KERNEL 313 314 /* 315 * DEPRECATED - should not be used by any new driver. This code uses the 316 * old queueing interface and if_start ABI and does not use the ifp's 317 * serializer. 318 */ 319 #define IF_HANDOFF(ifq, m, ifp) if_handoff(ifq, m, ifp, 0) 320 #define IF_HANDOFF_ADJ(ifq, m, ifp, adj) if_handoff(ifq, m, ifp, adj) 321 322 static __inline int 323 if_handoff(struct ifqueue *_ifq, struct mbuf *_m, struct ifnet *_ifp, 324 int _adjust) 325 { 326 int _need_if_start = 0; 327 328 crit_enter(); 329 330 if (IF_QFULL(_ifq)) { 331 IF_DROP(_ifq); 332 crit_exit(); 333 m_freem(_m); 334 return (0); 335 } 336 if (_ifp != NULL) { 337 _ifp->if_obytes += _m->m_pkthdr.len + _adjust; 338 if (_m->m_flags & M_MCAST) 339 _ifp->if_omcasts++; 340 _need_if_start = !(_ifp->if_flags & IFF_OACTIVE); 341 } 342 IF_ENQUEUE(_ifq, _m); 343 if (_need_if_start) { 344 (*_ifp->if_start)(_ifp); 345 } 346 crit_exit(); 347 return (1); 348 } 349 350 /* 351 * 72 was chosen below because it is the size of a TCP/IP 352 * header (40) + the minimum mss (32). 353 */ 354 #define IF_MINMTU 72 355 #define IF_MAXMTU 65535 356 357 #endif /* _KERNEL */ 358 359 struct ifaddr_container { 360 #define IFA_CONTAINER_MAGIC 0x19810219 361 #define IFA_CONTAINER_DEAD 0xc0dedead 362 uint32_t ifa_magic; /* IFA_CONTAINER_MAGIC */ 363 struct ifaddr *ifa; 364 TAILQ_ENTRY(ifaddr_container) ifa_link; /* queue macro glue */ 365 u_int ifa_refcnt; /* references to this structure */ 366 }; 367 368 /* 369 * The ifaddr structure contains information about one address 370 * of an interface. They are maintained by the different address families, 371 * are allocated and attached when an address is set, and are linked 372 * together so all addresses for an interface can be located. 373 */ 374 struct ifaddr { 375 struct sockaddr *ifa_addr; /* address of interface */ 376 struct sockaddr *ifa_dstaddr; /* other end of p-to-p link */ 377 #define ifa_broadaddr ifa_dstaddr /* broadcast address interface */ 378 struct sockaddr *ifa_netmask; /* used to determine subnet */ 379 struct if_data if_data; /* not all members are meaningful */ 380 struct ifnet *ifa_ifp; /* back-pointer to interface */ 381 void *ifa_link_pad; 382 struct ifaddr_container *ifa_containers; 383 void (*ifa_rtrequest) /* check or clean routes (+ or -)'d */ 384 (int, struct rtentry *, struct rt_addrinfo *); 385 u_short ifa_flags; /* mostly rt_flags for cloning */ 386 cpumask_t ifa_cpumask; 387 int ifa_metric; /* cost of going out this interface */ 388 #ifdef notdef 389 struct rtentry *ifa_rt; /* XXXX for ROUTETOIF ????? */ 390 #endif 391 int (*ifa_claim_addr) /* check if an addr goes to this if */ 392 (struct ifaddr *, struct sockaddr *); 393 394 }; 395 #define IFA_ROUTE RTF_UP /* route installed */ 396 397 /* for compatibility with other BSDs */ 398 #define ifa_list ifa_link 399 400 /* 401 * The prefix structure contains information about one prefix 402 * of an interface. They are maintained by the different address families, 403 * are allocated and attached when an prefix or an address is set, 404 * and are linked together so all prefixes for an interface can be located. 405 */ 406 struct ifprefix { 407 struct sockaddr *ifpr_prefix; /* prefix of interface */ 408 struct ifnet *ifpr_ifp; /* back-pointer to interface */ 409 TAILQ_ENTRY(ifprefix) ifpr_list; /* queue macro glue */ 410 u_char ifpr_plen; /* prefix length in bits */ 411 u_char ifpr_type; /* protocol dependent prefix type */ 412 }; 413 414 /* 415 * Multicast address structure. This is analogous to the ifaddr 416 * structure except that it keeps track of multicast addresses. 417 * Also, the reference count here is a count of requests for this 418 * address, not a count of pointers to this structure. 419 */ 420 struct ifmultiaddr { 421 LIST_ENTRY(ifmultiaddr) ifma_link; /* queue macro glue */ 422 struct sockaddr *ifma_addr; /* address this membership is for */ 423 struct sockaddr *ifma_lladdr; /* link-layer translation, if any */ 424 struct ifnet *ifma_ifp; /* back-pointer to interface */ 425 u_int ifma_refcount; /* reference count */ 426 void *ifma_protospec; /* protocol-specific state, if any */ 427 }; 428 429 #ifdef _KERNEL 430 /* interface address change event */ 431 typedef void (*ifaddr_event_handler_t)(void *, struct ifnet *); 432 EVENTHANDLER_DECLARE(ifaddr_event, ifaddr_event_handler_t); 433 /* new interface attach event */ 434 typedef void (*ifnet_attach_event_handler_t)(void *, struct ifnet *); 435 EVENTHANDLER_DECLARE(ifnet_attach_event, ifnet_attach_event_handler_t); 436 /* interface detach event */ 437 typedef void (*ifnet_detach_event_handler_t)(void *, struct ifnet *); 438 EVENTHANDLER_DECLARE(ifnet_detach_event, ifnet_detach_event_handler_t); 439 440 static __inline void 441 _IFAREF(struct ifaddr *_ifa, int _cpu_id) 442 { 443 struct ifaddr_container *_ifac = &_ifa->ifa_containers[_cpu_id]; 444 445 crit_enter(); 446 KKASSERT(_ifac->ifa_magic == IFA_CONTAINER_MAGIC); 447 ++_ifac->ifa_refcnt; 448 crit_exit(); 449 } 450 451 static __inline void 452 IFAREF(struct ifaddr *_ifa) 453 { 454 _IFAREF(_ifa, mycpuid); 455 } 456 457 #include <sys/malloc.h> 458 459 MALLOC_DECLARE(M_IFADDR); 460 MALLOC_DECLARE(M_IFMADDR); 461 462 void ifac_free(struct ifaddr_container *, int); 463 464 static __inline void 465 _IFAFREE(struct ifaddr *_ifa, int _cpu_id) 466 { 467 struct ifaddr_container *_ifac = &_ifa->ifa_containers[_cpu_id]; 468 469 crit_enter(); 470 KKASSERT(_ifac->ifa_magic == IFA_CONTAINER_MAGIC); 471 KKASSERT(_ifac->ifa_refcnt > 0); 472 if (--_ifac->ifa_refcnt == 0) 473 ifac_free(_ifac, _cpu_id); 474 crit_exit(); 475 } 476 477 static __inline void 478 IFAFREE(struct ifaddr *_ifa) 479 { 480 _IFAFREE(_ifa, mycpuid); 481 } 482 483 extern struct ifnethead ifnet; 484 extern struct ifnet **ifindex2ifnet; 485 extern int ifqmaxlen; 486 extern struct ifnet loif[]; 487 extern int if_index; 488 489 void ether_ifattach(struct ifnet *, uint8_t *, struct lwkt_serialize *); 490 void ether_ifattach_bpf(struct ifnet *, uint8_t *, u_int, u_int, 491 struct lwkt_serialize *); 492 void ether_ifdetach(struct ifnet *); 493 void ether_input(struct ifnet *, struct mbuf *); 494 void ether_input_chain(struct ifnet *, struct mbuf *, struct mbuf_chain *); 495 #ifdef ETHER_INPUT_CHAIN 496 void ether_input_dispatch(struct mbuf_chain *); 497 #endif 498 void ether_demux(struct ifnet *, struct mbuf *); 499 int ether_output_frame(struct ifnet *, struct mbuf *); 500 int ether_ioctl(struct ifnet *, int, caddr_t); 501 uint32_t ether_crc32_le(const uint8_t *, size_t); 502 uint32_t ether_crc32_be(const uint8_t *, size_t); 503 504 int if_addmulti(struct ifnet *, struct sockaddr *, struct ifmultiaddr **); 505 int if_allmulti(struct ifnet *, int); 506 void if_attach(struct ifnet *, struct lwkt_serialize *); 507 int if_delmulti(struct ifnet *, struct sockaddr *); 508 void if_purgeaddrs_nolink(struct ifnet *); 509 void if_detach(struct ifnet *); 510 void if_down(struct ifnet *); 511 void if_link_state_change(struct ifnet *); 512 void if_initname(struct ifnet *, const char *, int); 513 int if_getanyethermac(uint16_t *, int); 514 int if_printf(struct ifnet *, const char *, ...) __printflike(2, 3); 515 void if_route(struct ifnet *, int flag, int fam); 516 int if_setlladdr(struct ifnet *, const u_char *, int); 517 void if_unroute(struct ifnet *, int flag, int fam); 518 void if_up(struct ifnet *); 519 /*void ifinit(void);*/ /* declared in systm.h for main() */ 520 int ifioctl(struct socket *, u_long, caddr_t, struct ucred *); 521 int ifpromisc(struct ifnet *, int); 522 struct ifnet *ifunit(const char *); 523 struct ifnet *if_withname(struct sockaddr *); 524 525 struct ifaddr *ifa_ifwithaddr(struct sockaddr *); 526 struct ifaddr *ifa_ifwithdstaddr(struct sockaddr *); 527 struct ifaddr *ifa_ifwithnet(struct sockaddr *); 528 struct ifaddr *ifa_ifwithroute(int, struct sockaddr *, struct sockaddr *); 529 struct ifaddr *ifaof_ifpforaddr(struct sockaddr *, struct ifnet *); 530 531 void *ifa_create(int, int); 532 void ifa_destroy(struct ifaddr *); 533 void ifa_iflink(struct ifaddr *, struct ifnet *, int); 534 void ifa_ifunlink(struct ifaddr *, struct ifnet *); 535 struct lwkt_port *ifa_portfn(int); 536 537 struct ifmultiaddr *ifmaof_ifpforaddr(struct sockaddr *, struct ifnet *); 538 int if_simloop(struct ifnet *ifp, struct mbuf *m, int af, int hlen); 539 540 #define IF_LLSOCKADDR(ifp) \ 541 ((struct sockaddr_dl *)(ifp)->if_lladdr->ifa_addr) 542 #define IF_LLADDR(ifp) LLADDR(IF_LLSOCKADDR(ifp)) 543 544 #ifdef DEVICE_POLLING 545 typedef void poll_handler_t (struct ifnet *ifp, enum poll_cmd cmd, int count); 546 int ether_poll_register(struct ifnet *); 547 int ether_poll_deregister(struct ifnet *); 548 int ether_pollcpu_register(struct ifnet *, int); 549 #endif /* DEVICE_POLLING */ 550 #endif /* _KERNEL */ 551 552 #endif /* !_NET_IF_VAR_H_ */ 553