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 1.71 2008/11/22 04:00:53 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 ucred; 86 struct lwkt_serialize; 87 struct ifaddr_container; 88 struct ifaddr; 89 struct lwkt_port; 90 struct lwkt_msg; 91 struct netmsg; 92 struct pktinfo; 93 struct ifpoll_info; 94 95 #include <sys/queue.h> /* get TAILQ macros */ 96 97 #include <net/altq/if_altq.h> 98 99 #ifdef _KERNEL 100 #include <sys/eventhandler.h> 101 #include <sys/mbuf.h> 102 #include <sys/systm.h> /* XXX */ 103 #include <sys/thread2.h> 104 #endif /* _KERNEL */ 105 106 #define IF_DUNIT_NONE -1 107 108 TAILQ_HEAD(ifnethead, ifnet); /* we use TAILQs so that the order of */ 109 TAILQ_HEAD(ifaddrhead, ifaddr_container); /* instantiation is preserved in the list */ 110 TAILQ_HEAD(ifprefixhead, ifprefix); 111 LIST_HEAD(ifmultihead, ifmultiaddr); 112 113 /* 114 * Structure defining a queue for a network interface. 115 */ 116 struct ifqueue { 117 struct mbuf *ifq_head; 118 struct mbuf *ifq_tail; 119 int ifq_len; 120 int ifq_maxlen; 121 int ifq_drops; 122 }; 123 124 /* 125 * Note of DEVICE_POLLING 126 * 1) Any file(*.c) that depends on DEVICE_POLLING supports in this 127 * file should include opt_polling.h at its beginning. 128 * 2) When struct changes, which are conditioned by DEVICE_POLLING, 129 * are to be introduced, please keep the struct's size and layout 130 * same, no matter whether DEVICE_POLLING is defined or not. 131 * See ifnet.if_poll and ifnet.if_poll_unused for example. 132 */ 133 134 #ifdef DEVICE_POLLING 135 enum poll_cmd { POLL_ONLY, POLL_AND_CHECK_STATUS, POLL_DEREGISTER, 136 POLL_REGISTER }; 137 #endif 138 139 enum ifnet_serialize { 140 IFNET_SERIALIZE_ALL, 141 IFNET_SERIALIZE_MAIN, 142 IFNET_SERIALIZE_TX_BASE = 0x10000000, 143 IFNET_SERIALIZE_RX_BASE = 0x20000000 144 }; 145 #define IFNET_SERIALIZE_TX IFNET_SERIALIZE_TX_BASE 146 #define IFNET_SERIALIZE_RX(i) (IFNET_SERIALIZE_RX_BASE + (i)) 147 148 /* 149 * Structure defining a network interface. 150 * 151 * (Would like to call this struct ``if'', but C isn't PL/1.) 152 */ 153 154 /* 155 * NB: For FreeBSD, it is assumed that each NIC driver's softc starts with 156 * one of these structures, typically held within an arpcom structure. 157 * 158 * struct <foo>_softc { 159 * struct arpcom { 160 * struct ifnet ac_if; 161 * ... 162 * } <arpcom> ; 163 * ... 164 * }; 165 * 166 * The assumption is used in a number of places, including many 167 * files in sys/net, device drivers, and sys/dev/mii.c:miibus_attach(). 168 * 169 * Unfortunately devices' softc are opaque, so we depend on this layout 170 * to locate the struct ifnet from the softc in the generic code. 171 * 172 * MPSAFE NOTES: 173 * 174 * ifnet is protected by calling if_serialize, if_tryserialize and 175 * if_deserialize serialize functions with the ifnet_serialize parameter. 176 * ifnet.if_snd is protected by its own spinlock. Callers of if_ioctl, 177 * if_watchdog, if_init, if_resolvemulti, and if_poll should call the 178 * ifnet serialize functions with IFNET_SERIALIZE_ALL. Callers of if_start 179 * sould call the ifnet serialize functions with IFNET_SERIALIZE_TX. 180 * 181 * FIXME: Device drivers usually use the same serializer for their interrupt 182 * FIXME: but this is not required. 183 * 184 * Caller of if_output must not serialize ifnet by calling ifnet serialize 185 * functions; if_output will call the ifnet serialize functions based on 186 * its own needs. Caller of if_input does not necessarily hold the related 187 * serializer. 188 * 189 * If a device driver installs the same serializer for its interrupt 190 * as for ifnet, then the driver only really needs to worry about further 191 * serialization in timeout based entry points. All other entry points 192 * will already be serialized. Older ISA drivers still using the old 193 * interrupt infrastructure will have to obtain and release the serializer 194 * in their interrupt routine themselves. 195 */ 196 struct ifnet { 197 void *if_softc; /* pointer to driver state */ 198 TAILQ_ENTRY(ifnet) if_link; /* all struct ifnets are chained */ 199 char if_xname[IFNAMSIZ]; /* external name (name + unit) */ 200 const char *if_dname; /* driver name */ 201 int if_dunit; /* unit or IF_DUNIT_NONE */ 202 void *if_vlantrunks; /* vlan trunks */ 203 struct ifaddrhead *if_addrheads; /* array[NCPU] of TAILQs of addresses per if */ 204 int if_pcount; /* number of promiscuous listeners */ 205 void *if_carp; /* carp interfaces */ 206 struct bpf_if *if_bpf; /* packet filter structure */ 207 u_short if_index; /* numeric abbreviation for this if */ 208 short if_timer; /* time 'til if_watchdog called */ 209 int if_flags; /* up/down, broadcast, etc. */ 210 int if_capabilities; /* interface capabilities */ 211 int if_capenable; /* enabled features */ 212 void *if_linkmib; /* link-type-specific MIB data */ 213 size_t if_linkmiblen; /* length of above data */ 214 struct if_data if_data; 215 struct ifmultihead if_multiaddrs; /* multicast addresses configured */ 216 int if_amcount; /* number of all-multicast requests */ 217 /* procedure handles */ 218 int (*if_output) /* output routine (enqueue) */ 219 (struct ifnet *, struct mbuf *, struct sockaddr *, 220 struct rtentry *); 221 void (*if_input) /* input routine from hardware driver */ 222 (struct ifnet *, struct mbuf *); 223 void (*if_start) /* initiate output routine */ 224 (struct ifnet *); 225 int (*if_ioctl) /* ioctl routine */ 226 (struct ifnet *, u_long, caddr_t, struct ucred *); 227 void (*if_watchdog) /* timer routine */ 228 (struct ifnet *); 229 void (*if_init) /* Init routine */ 230 (void *); 231 int (*if_resolvemulti) /* validate/resolve multicast */ 232 (struct ifnet *, struct sockaddr **, struct sockaddr *); 233 int (*if_start_cpuid) /* cpuid to run if_start */ 234 (struct ifnet *); 235 #ifdef DEVICE_POLLING 236 void (*if_poll) /* IFF_POLLING support */ 237 (struct ifnet *, enum poll_cmd, int); 238 int if_poll_cpuid; 239 #else 240 /* Place holders */ 241 void (*if_poll_unused)(void); 242 int if_poll_cpuid_used; 243 #endif 244 void (*if_serialize) 245 (struct ifnet *, enum ifnet_serialize); 246 void (*if_deserialize) 247 (struct ifnet *, enum ifnet_serialize); 248 int (*if_tryserialize) 249 (struct ifnet *, enum ifnet_serialize); 250 #ifdef INVARIANTS 251 void (*if_serialize_assert) 252 (struct ifnet *, enum ifnet_serialize, boolean_t); 253 #else 254 /* Place holders */ 255 void (*if_serialize_unused)(void); 256 #endif 257 #ifdef IFPOLL_ENABLE 258 void (*if_qpoll) 259 (struct ifnet *, struct ifpoll_info *); 260 #else 261 /* Place holders */ 262 void (*if_qpoll_unused)(void); 263 #endif 264 struct ifaltq if_snd; /* output queue (includes altq) */ 265 struct ifprefixhead if_prefixhead; /* list of prefixes per if */ 266 const uint8_t *if_broadcastaddr; 267 void *if_bridge; /* bridge glue */ 268 void *if_afdata[AF_MAX]; 269 struct ifaddr *if_lladdr; 270 struct lwkt_serialize *if_serializer; /* serializer or MP lock */ 271 struct lwkt_serialize if_default_serializer; /* if not supplied */ 272 int if_cpuid; 273 struct netmsg *if_start_nmsg; /* percpu messages to schedule if_start */ 274 }; 275 typedef void if_init_f_t (void *); 276 277 #define if_mtu if_data.ifi_mtu 278 #define if_type if_data.ifi_type 279 #define if_physical if_data.ifi_physical 280 #define if_addrlen if_data.ifi_addrlen 281 #define if_hdrlen if_data.ifi_hdrlen 282 #define if_metric if_data.ifi_metric 283 #define if_link_state if_data.ifi_link_state 284 #define if_baudrate if_data.ifi_baudrate 285 #define if_hwassist if_data.ifi_hwassist 286 #define if_ipackets if_data.ifi_ipackets 287 #define if_ierrors if_data.ifi_ierrors 288 #define if_opackets if_data.ifi_opackets 289 #define if_oerrors if_data.ifi_oerrors 290 #define if_collisions if_data.ifi_collisions 291 #define if_ibytes if_data.ifi_ibytes 292 #define if_obytes if_data.ifi_obytes 293 #define if_imcasts if_data.ifi_imcasts 294 #define if_omcasts if_data.ifi_omcasts 295 #define if_iqdrops if_data.ifi_iqdrops 296 #define if_noproto if_data.ifi_noproto 297 #define if_lastchange if_data.ifi_lastchange 298 #define if_recvquota if_data.ifi_recvquota 299 #define if_xmitquota if_data.ifi_xmitquota 300 #define if_rawoutput(if, m, sa) if_output(if, m, sa, NULL) 301 302 /* for compatibility with other BSDs */ 303 #define if_list if_link 304 305 306 /* 307 * Output queues (ifp->if_snd) and slow device input queues (*ifp->if_slowq) 308 * are queues of messages stored on ifqueue structures 309 * (defined above). Entries are added to and deleted from these structures 310 * by these macros, which should be called with ipl raised to splimp(). 311 */ 312 #define IF_QFULL(ifq) ((ifq)->ifq_len >= (ifq)->ifq_maxlen) 313 #define IF_DROP(ifq) ((ifq)->ifq_drops++) 314 #define IF_QLEN(ifq) ((ifq)->ifq_len) 315 #define IF_QEMPTY(ifq) (IF_QLEN(ifq) == 0) 316 #define IF_ENQUEUE(ifq, m) do { \ 317 (m)->m_nextpkt = 0; \ 318 if ((ifq)->ifq_tail == 0) \ 319 (ifq)->ifq_head = m; \ 320 else \ 321 (ifq)->ifq_tail->m_nextpkt = m; \ 322 (ifq)->ifq_tail = m; \ 323 (ifq)->ifq_len++; \ 324 } while (0) 325 #define IF_PREPEND(ifq, m) do { \ 326 (m)->m_nextpkt = (ifq)->ifq_head; \ 327 if ((ifq)->ifq_tail == 0) \ 328 (ifq)->ifq_tail = (m); \ 329 (ifq)->ifq_head = (m); \ 330 (ifq)->ifq_len++; \ 331 } while (0) 332 #define IF_DEQUEUE(ifq, m) do { \ 333 (m) = (ifq)->ifq_head; \ 334 if (m) { \ 335 if (((ifq)->ifq_head = (m)->m_nextpkt) == 0) \ 336 (ifq)->ifq_tail = 0; \ 337 (m)->m_nextpkt = 0; \ 338 (ifq)->ifq_len--; \ 339 } \ 340 } while (0) 341 342 #define IF_POLL(ifq, m) ((m) = (ifq)->ifq_head) 343 344 #define IF_DRAIN(ifq) do { \ 345 struct mbuf *m; \ 346 while (1) { \ 347 IF_DEQUEUE(ifq, m); \ 348 if (m == NULL) \ 349 break; \ 350 m_freem(m); \ 351 } \ 352 } while (0) 353 354 #ifdef _KERNEL 355 356 #ifdef INVARIANTS 357 #define ASSERT_IFNET_SERIALIZED_ALL(ifp) \ 358 (ifp)->if_serialize_assert((ifp), IFNET_SERIALIZE_ALL, TRUE) 359 #define ASSERT_IFNET_NOT_SERIALIZED_ALL(ifp) \ 360 (ifp)->if_serialize_assert((ifp), IFNET_SERIALIZE_ALL, FALSE) 361 362 #define ASSERT_IFNET_SERIALIZED_TX(ifp) \ 363 (ifp)->if_serialize_assert((ifp), IFNET_SERIALIZE_TX, TRUE) 364 #define ASSERT_IFNET_NOT_SERIALIZED_TX(ifp) \ 365 (ifp)->if_serialize_assert((ifp), IFNET_SERIALIZE_TX, FALSE) 366 367 #define ASSERT_IFNET_SERIALIZED_MAIN(ifp) \ 368 (ifp)->if_serialize_assert((ifp), IFNET_SERIALIZE_MAIN, TRUE) 369 #define ASSERT_IFNET_NOT_SERIALIZED_MAIN(ifp) \ 370 (ifp)->if_serialize_assert((ifp), IFNET_SERIALIZE_MAIN, FALSE) 371 #else 372 #define ASSERT_IFNET_SERIALIZED_ALL(ifp) ((void)0) 373 #define ASSERT_IFNET_NOT_SERIALIZED_ALL(ifp) ((void)0) 374 #define ASSERT_IFNET_SERIALIZED_TX(ifp) ((void)0) 375 #define ASSERT_IFNET_NOT_SERIALIZED_TX(ifp) ((void)0) 376 #define ASSERT_IFNET_SERIALIZED_MAIN(ifp) ((void)0) 377 #define ASSERT_IFNET_NOT_SERIALIZED_MAIN(ifp) ((void)0) 378 #endif 379 380 static __inline void 381 ifnet_serialize_all(struct ifnet *_ifp) 382 { 383 _ifp->if_serialize(_ifp, IFNET_SERIALIZE_ALL); 384 } 385 386 static __inline void 387 ifnet_deserialize_all(struct ifnet *_ifp) 388 { 389 _ifp->if_deserialize(_ifp, IFNET_SERIALIZE_ALL); 390 } 391 392 static __inline int 393 ifnet_tryserialize_all(struct ifnet *_ifp) 394 { 395 return _ifp->if_tryserialize(_ifp, IFNET_SERIALIZE_ALL); 396 } 397 398 static __inline void 399 ifnet_serialize_tx(struct ifnet *_ifp) 400 { 401 _ifp->if_serialize(_ifp, IFNET_SERIALIZE_TX); 402 } 403 404 static __inline void 405 ifnet_deserialize_tx(struct ifnet *_ifp) 406 { 407 _ifp->if_deserialize(_ifp, IFNET_SERIALIZE_TX); 408 } 409 410 static __inline int 411 ifnet_tryserialize_tx(struct ifnet *_ifp) 412 { 413 return _ifp->if_tryserialize(_ifp, IFNET_SERIALIZE_TX); 414 } 415 416 static __inline void 417 ifnet_serialize_main(struct ifnet *_ifp) 418 { 419 _ifp->if_serialize(_ifp, IFNET_SERIALIZE_MAIN); 420 } 421 422 static __inline void 423 ifnet_deserialize_main(struct ifnet *_ifp) 424 { 425 _ifp->if_deserialize(_ifp, IFNET_SERIALIZE_MAIN); 426 } 427 428 static __inline int 429 ifnet_tryserialize_main(struct ifnet *_ifp) 430 { 431 return _ifp->if_tryserialize(_ifp, IFNET_SERIALIZE_MAIN); 432 } 433 434 /* 435 * DEPRECATED - should not be used by any new driver. This code uses the 436 * old queueing interface and if_start ABI and does not use the ifp's 437 * serializer. 438 */ 439 #define IF_HANDOFF(ifq, m, ifp) if_handoff(ifq, m, ifp, 0) 440 #define IF_HANDOFF_ADJ(ifq, m, ifp, adj) if_handoff(ifq, m, ifp, adj) 441 442 static __inline int 443 if_handoff(struct ifqueue *_ifq, struct mbuf *_m, struct ifnet *_ifp, 444 int _adjust) 445 { 446 int _need_if_start = 0; 447 448 crit_enter(); 449 450 if (IF_QFULL(_ifq)) { 451 IF_DROP(_ifq); 452 crit_exit(); 453 m_freem(_m); 454 return (0); 455 } 456 if (_ifp != NULL) { 457 _ifp->if_obytes += _m->m_pkthdr.len + _adjust; 458 if (_m->m_flags & M_MCAST) 459 _ifp->if_omcasts++; 460 _need_if_start = !(_ifp->if_flags & IFF_OACTIVE); 461 } 462 IF_ENQUEUE(_ifq, _m); 463 if (_need_if_start) { 464 (*_ifp->if_start)(_ifp); 465 } 466 crit_exit(); 467 return (1); 468 } 469 470 /* 471 * 72 was chosen below because it is the size of a TCP/IP 472 * header (40) + the minimum mss (32). 473 */ 474 #define IF_MINMTU 72 475 #define IF_MAXMTU 65535 476 477 #endif /* _KERNEL */ 478 479 struct in_ifaddr; 480 481 struct in_ifaddr_container { 482 struct in_ifaddr *ia; 483 LIST_ENTRY(in_ifaddr_container) ia_hash; 484 /* entry in bucket of inet addresses */ 485 TAILQ_ENTRY(in_ifaddr_container) ia_link; 486 /* list of internet addresses */ 487 struct ifaddr_container *ia_ifac; /* parent ifaddr_container */ 488 }; 489 490 struct ifaddr_container { 491 #define IFA_CONTAINER_MAGIC 0x19810219 492 #define IFA_CONTAINER_DEAD 0xc0dedead 493 uint32_t ifa_magic; /* IFA_CONTAINER_MAGIC */ 494 struct ifaddr *ifa; 495 TAILQ_ENTRY(ifaddr_container) ifa_link; /* queue macro glue */ 496 u_int ifa_refcnt; /* references to this structure */ 497 uint16_t ifa_listmask; /* IFA_LIST_ */ 498 uint16_t ifa_prflags; /* protocol specific flags */ 499 500 /* 501 * Protocol specific states 502 */ 503 union { 504 struct in_ifaddr_container u_in_ifac; 505 } ifa_proto_u; 506 }; 507 508 #define IFA_LIST_IFADDRHEAD 0x01 /* on ifnet.if_addrheads[cpuid] */ 509 #define IFA_LIST_IN_IFADDRHEAD 0x02 /* on in_ifaddrheads[cpuid] */ 510 #define IFA_LIST_IN_IFADDRHASH 0x04 /* on in_ifaddrhashtbls[cpuid] */ 511 512 #define IFA_PRF_FLAG0 0x01 513 #define IFA_PRF_FLAG1 0x02 514 #define IFA_PRF_FLAG2 0x04 515 #define IFA_PRF_FLAG3 0x08 516 517 /* 518 * The ifaddr structure contains information about one address 519 * of an interface. They are maintained by the different address families, 520 * are allocated and attached when an address is set, and are linked 521 * together so all addresses for an interface can be located. 522 */ 523 struct ifaddr { 524 struct sockaddr *ifa_addr; /* address of interface */ 525 struct sockaddr *ifa_dstaddr; /* other end of p-to-p link */ 526 #define ifa_broadaddr ifa_dstaddr /* broadcast address interface */ 527 struct sockaddr *ifa_netmask; /* used to determine subnet */ 528 struct if_data if_data; /* not all members are meaningful */ 529 struct ifnet *ifa_ifp; /* back-pointer to interface */ 530 void *ifa_link_pad; 531 struct ifaddr_container *ifa_containers; 532 void (*ifa_rtrequest) /* check or clean routes (+ or -)'d */ 533 (int, struct rtentry *, struct rt_addrinfo *); 534 u_short ifa_flags; /* mostly rt_flags for cloning */ 535 int ifa_ncnt; /* # of valid ifaddr_container */ 536 int ifa_metric; /* cost of going out this interface */ 537 #ifdef notdef 538 struct rtentry *ifa_rt; /* XXXX for ROUTETOIF ????? */ 539 #endif 540 int (*ifa_claim_addr) /* check if an addr goes to this if */ 541 (struct ifaddr *, struct sockaddr *); 542 543 }; 544 #define IFA_ROUTE RTF_UP /* route installed */ 545 546 /* for compatibility with other BSDs */ 547 #define ifa_list ifa_link 548 549 /* 550 * The prefix structure contains information about one prefix 551 * of an interface. They are maintained by the different address families, 552 * are allocated and attached when an prefix or an address is set, 553 * and are linked together so all prefixes for an interface can be located. 554 */ 555 struct ifprefix { 556 struct sockaddr *ifpr_prefix; /* prefix of interface */ 557 struct ifnet *ifpr_ifp; /* back-pointer to interface */ 558 TAILQ_ENTRY(ifprefix) ifpr_list; /* queue macro glue */ 559 u_char ifpr_plen; /* prefix length in bits */ 560 u_char ifpr_type; /* protocol dependent prefix type */ 561 }; 562 563 /* 564 * Multicast address structure. This is analogous to the ifaddr 565 * structure except that it keeps track of multicast addresses. 566 * Also, the reference count here is a count of requests for this 567 * address, not a count of pointers to this structure. 568 */ 569 struct ifmultiaddr { 570 LIST_ENTRY(ifmultiaddr) ifma_link; /* queue macro glue */ 571 struct sockaddr *ifma_addr; /* address this membership is for */ 572 struct sockaddr *ifma_lladdr; /* link-layer translation, if any */ 573 struct ifnet *ifma_ifp; /* back-pointer to interface */ 574 u_int ifma_refcount; /* reference count */ 575 void *ifma_protospec; /* protocol-specific state, if any */ 576 }; 577 578 #ifdef _KERNEL 579 580 enum ifaddr_event { 581 IFADDR_EVENT_ADD, 582 IFADDR_EVENT_DELETE, 583 IFADDR_EVENT_CHANGE 584 }; 585 586 /* interface address change event */ 587 typedef void (*ifaddr_event_handler_t)(void *, struct ifnet *, 588 enum ifaddr_event, struct ifaddr *); 589 EVENTHANDLER_DECLARE(ifaddr_event, ifaddr_event_handler_t); 590 /* new interface attach event */ 591 typedef void (*ifnet_attach_event_handler_t)(void *, struct ifnet *); 592 EVENTHANDLER_DECLARE(ifnet_attach_event, ifnet_attach_event_handler_t); 593 /* interface detach event */ 594 typedef void (*ifnet_detach_event_handler_t)(void *, struct ifnet *); 595 EVENTHANDLER_DECLARE(ifnet_detach_event, ifnet_detach_event_handler_t); 596 597 #ifdef INVARIANTS 598 #define ASSERT_IFAC_VALID(ifac) do { \ 599 KKASSERT((ifac)->ifa_magic == IFA_CONTAINER_MAGIC); \ 600 KKASSERT((ifac)->ifa_refcnt > 0); \ 601 } while (0) 602 #else 603 #define ASSERT_IFAC_VALID(ifac) ((void)0) 604 #endif 605 606 static __inline void 607 _IFAREF(struct ifaddr *_ifa, int _cpu_id) 608 { 609 struct ifaddr_container *_ifac = &_ifa->ifa_containers[_cpu_id]; 610 611 crit_enter(); 612 ASSERT_IFAC_VALID(_ifac); 613 ++_ifac->ifa_refcnt; 614 crit_exit(); 615 } 616 617 static __inline void 618 IFAREF(struct ifaddr *_ifa) 619 { 620 _IFAREF(_ifa, mycpuid); 621 } 622 623 #include <sys/malloc.h> 624 625 MALLOC_DECLARE(M_IFADDR); 626 MALLOC_DECLARE(M_IFMADDR); 627 628 void ifac_free(struct ifaddr_container *, int); 629 630 static __inline void 631 _IFAFREE(struct ifaddr *_ifa, int _cpu_id) 632 { 633 struct ifaddr_container *_ifac = &_ifa->ifa_containers[_cpu_id]; 634 635 crit_enter(); 636 ASSERT_IFAC_VALID(_ifac); 637 if (--_ifac->ifa_refcnt == 0) 638 ifac_free(_ifac, _cpu_id); 639 crit_exit(); 640 } 641 642 static __inline void 643 IFAFREE(struct ifaddr *_ifa) 644 { 645 _IFAFREE(_ifa, mycpuid); 646 } 647 648 struct lwkt_port *ifnet_portfn(int); 649 int ifnet_domsg(struct lwkt_msg *, int); 650 void ifnet_sendmsg(struct lwkt_msg *, int); 651 void ifnet_forwardmsg(struct lwkt_msg *, int); 652 653 static __inline int 654 ifa_domsg(struct lwkt_msg *_lmsg, int _cpu) 655 { 656 return ifnet_domsg(_lmsg, _cpu); 657 } 658 659 static __inline void 660 ifa_sendmsg(struct lwkt_msg *_lmsg, int _cpu) 661 { 662 ifnet_sendmsg(_lmsg, _cpu); 663 } 664 665 static __inline void 666 ifa_forwardmsg(struct lwkt_msg *_lmsg, int _nextcpu) 667 { 668 ifnet_forwardmsg(_lmsg, _nextcpu); 669 } 670 671 extern struct ifnethead ifnet; 672 extern struct ifnet **ifindex2ifnet; 673 extern int ifqmaxlen; 674 extern struct ifnet loif[]; 675 extern int if_index; 676 677 void ether_ifattach(struct ifnet *, uint8_t *, struct lwkt_serialize *); 678 void ether_ifattach_bpf(struct ifnet *, uint8_t *, u_int, u_int, 679 struct lwkt_serialize *); 680 void ether_ifdetach(struct ifnet *); 681 void ether_demux_oncpu(struct ifnet *, struct mbuf *); 682 void ether_input_oncpu(struct ifnet *, struct mbuf *); 683 void ether_reinput_oncpu(struct ifnet *, struct mbuf *, int); 684 void ether_input_chain(struct ifnet *, struct mbuf *, 685 const struct pktinfo *, struct mbuf_chain *); 686 void ether_input_chain_init(struct mbuf_chain *); 687 void ether_input_dispatch(struct mbuf_chain *); 688 int ether_output_frame(struct ifnet *, struct mbuf *); 689 int ether_ioctl(struct ifnet *, int, caddr_t); 690 uint32_t ether_crc32_le(const uint8_t *, size_t); 691 uint32_t ether_crc32_be(const uint8_t *, size_t); 692 693 int if_addmulti(struct ifnet *, struct sockaddr *, struct ifmultiaddr **); 694 int if_allmulti(struct ifnet *, int); 695 void if_attach(struct ifnet *, struct lwkt_serialize *); 696 int if_delmulti(struct ifnet *, struct sockaddr *); 697 void if_purgeaddrs_nolink(struct ifnet *); 698 void if_detach(struct ifnet *); 699 void if_down(struct ifnet *); 700 void if_link_state_change(struct ifnet *); 701 void if_initname(struct ifnet *, const char *, int); 702 int if_getanyethermac(uint16_t *, int); 703 int if_printf(struct ifnet *, const char *, ...) __printflike(2, 3); 704 void if_route(struct ifnet *, int flag, int fam); 705 int if_setlladdr(struct ifnet *, const u_char *, int); 706 void if_unroute(struct ifnet *, int flag, int fam); 707 void if_up(struct ifnet *); 708 /*void ifinit(void);*/ /* declared in systm.h for main() */ 709 int ifioctl(struct socket *, u_long, caddr_t, struct ucred *); 710 int ifpromisc(struct ifnet *, int); 711 struct ifnet *ifunit(const char *); 712 struct ifnet *if_withname(struct sockaddr *); 713 714 struct ifaddr *ifa_ifwithaddr(struct sockaddr *); 715 struct ifaddr *ifa_ifwithdstaddr(struct sockaddr *); 716 struct ifaddr *ifa_ifwithnet(struct sockaddr *); 717 struct ifaddr *ifa_ifwithroute(int, struct sockaddr *, struct sockaddr *); 718 struct ifaddr *ifaof_ifpforaddr(struct sockaddr *, struct ifnet *); 719 720 void *ifa_create(int, int); 721 void ifa_destroy(struct ifaddr *); 722 void ifa_iflink(struct ifaddr *, struct ifnet *, int); 723 void ifa_ifunlink(struct ifaddr *, struct ifnet *); 724 725 struct ifmultiaddr *ifmaof_ifpforaddr(struct sockaddr *, struct ifnet *); 726 int if_simloop(struct ifnet *ifp, struct mbuf *m, int af, int hlen); 727 void if_devstart(struct ifnet *ifp); 728 729 #define IF_LLSOCKADDR(ifp) \ 730 ((struct sockaddr_dl *)(ifp)->if_lladdr->ifa_addr) 731 #define IF_LLADDR(ifp) LLADDR(IF_LLSOCKADDR(ifp)) 732 733 #ifdef DEVICE_POLLING 734 typedef void poll_handler_t (struct ifnet *ifp, enum poll_cmd cmd, int count); 735 int ether_poll_register(struct ifnet *); 736 int ether_poll_deregister(struct ifnet *); 737 int ether_pollcpu_register(struct ifnet *, int); 738 #endif /* DEVICE_POLLING */ 739 740 #ifdef IFPOLL_ENABLE 741 int ifpoll_register(struct ifnet *); 742 int ifpoll_deregister(struct ifnet *); 743 #endif /* IFPOLL_ENABLE */ 744 745 #endif /* _KERNEL */ 746 747 #endif /* !_NET_IF_VAR_H_ */ 748