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 #ifndef _SYS_MUTEX_H_ 48 #include <sys/mutex.h> 49 #endif 50 51 /* 52 * Structures defining a network interface, providing a packet 53 * transport mechanism (ala level 0 of the PUP protocols). 54 * 55 * Each interface accepts output datagrams of a specified maximum 56 * length, and provides higher level routines with input datagrams 57 * received from its medium. 58 * 59 * Output occurs when the routine if_output is called, with four parameters: 60 * ifp->if_output(ifp, m, dst, rt) 61 * Here m is the mbuf chain to be sent and dst is the destination address. 62 * The output routine encapsulates the supplied datagram if necessary, 63 * and then transmits it on its medium. 64 * 65 * On input, each interface unwraps the data received by it, and either 66 * places it on the input queue of a internetwork datagram routine 67 * and posts the associated software interrupt, or passes the datagram to 68 * the routine if_input. It is called with the mbuf chain as parameter: 69 * ifp->if_input(ifp, m) 70 * The input routine removes the protocol dependent header if necessary. 71 * 72 * Routines exist for locating interfaces by their addresses 73 * or for locating a interface on a certain network, as well as more general 74 * routing and gateway routines maintaining information used to locate 75 * interfaces. These routines live in the files if.c and route.c 76 */ 77 78 /* 79 * Forward structure declarations for function prototypes [sic]. 80 */ 81 struct mbuf; 82 struct mbuf_chain; 83 struct proc; 84 struct rtentry; 85 struct rt_addrinfo; 86 struct socket; 87 struct ether_header; 88 struct ucred; 89 struct lwkt_serialize; 90 struct ifaddr_container; 91 struct ifaddr; 92 struct lwkt_port; 93 struct lwkt_msg; 94 union netmsg; 95 struct pktinfo; 96 struct ifpoll_info; 97 98 #include <sys/queue.h> /* get TAILQ macros */ 99 100 #include <net/altq/if_altq.h> 101 102 #ifdef _KERNEL 103 #include <sys/eventhandler.h> 104 #include <sys/mbuf.h> 105 #include <sys/systm.h> /* XXX */ 106 #include <sys/thread2.h> 107 #endif /* _KERNEL */ 108 109 #define IF_DUNIT_NONE -1 110 111 TAILQ_HEAD(ifnethead, ifnet); /* we use TAILQs so that the order of */ 112 TAILQ_HEAD(ifaddrhead, ifaddr_container); /* instantiation is preserved in the list */ 113 TAILQ_HEAD(ifprefixhead, ifprefix); 114 TAILQ_HEAD(ifmultihead, ifmultiaddr); 115 116 /* 117 * Structure defining a queue for a network interface. 118 */ 119 struct ifqueue { 120 struct mbuf *ifq_head; 121 struct mbuf *ifq_tail; 122 int ifq_len; 123 int ifq_maxlen; 124 int ifq_drops; 125 }; 126 127 /* 128 * Note of DEVICE_POLLING 129 * 1) Any file(*.c) that depends on DEVICE_POLLING supports in this 130 * file should include opt_polling.h at its beginning. 131 * 2) When struct changes, which are conditioned by DEVICE_POLLING, 132 * are to be introduced, please keep the struct's size and layout 133 * same, no matter whether DEVICE_POLLING is defined or not. 134 * See ifnet.if_poll and ifnet.if_poll_unused for example. 135 */ 136 137 #ifdef DEVICE_POLLING 138 enum poll_cmd { POLL_ONLY, POLL_AND_CHECK_STATUS, POLL_DEREGISTER, 139 POLL_REGISTER }; 140 #endif 141 142 enum ifnet_serialize { 143 IFNET_SERIALIZE_ALL, 144 IFNET_SERIALIZE_MAIN, 145 IFNET_SERIALIZE_TX_BASE = 0x10000000, 146 IFNET_SERIALIZE_RX_BASE = 0x20000000 147 }; 148 #define IFNET_SERIALIZE_TX IFNET_SERIALIZE_TX_BASE 149 #define IFNET_SERIALIZE_RX(i) (IFNET_SERIALIZE_RX_BASE + (i)) 150 151 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES) 152 153 /* 154 * Structure defining a network interface. 155 * 156 * (Would like to call this struct ``if'', but C isn't PL/1.) 157 */ 158 159 /* 160 * NB: For FreeBSD, it is assumed that each NIC driver's softc starts with 161 * one of these structures, typically held within an arpcom structure. 162 * 163 * struct <foo>_softc { 164 * struct arpcom { 165 * struct ifnet ac_if; 166 * ... 167 * } <arpcom> ; 168 * ... 169 * }; 170 * 171 * The assumption is used in a number of places, including many 172 * files in sys/net, device drivers, and sys/dev/mii.c:miibus_attach(). 173 * 174 * Unfortunately devices' softc are opaque, so we depend on this layout 175 * to locate the struct ifnet from the softc in the generic code. 176 * 177 * MPSAFE NOTES: 178 * 179 * ifnet is protected by calling if_serialize, if_tryserialize and 180 * if_deserialize serialize functions with the ifnet_serialize parameter. 181 * ifnet.if_snd is protected by its own spinlock. Callers of if_ioctl, 182 * if_watchdog, if_init, if_resolvemulti, and if_poll should call the 183 * ifnet serialize functions with IFNET_SERIALIZE_ALL. Callers of if_start 184 * sould call the ifnet serialize functions with IFNET_SERIALIZE_TX. 185 * 186 * FIXME: Device drivers usually use the same serializer for their interrupt 187 * FIXME: but this is not required. 188 * 189 * Caller of if_output must not serialize ifnet by calling ifnet serialize 190 * functions; if_output will call the ifnet serialize functions based on 191 * its own needs. Caller of if_input does not necessarily hold the related 192 * serializer. 193 * 194 * If a device driver installs the same serializer for its interrupt 195 * as for ifnet, then the driver only really needs to worry about further 196 * serialization in timeout based entry points. All other entry points 197 * will already be serialized. Older ISA drivers still using the old 198 * interrupt infrastructure will have to obtain and release the serializer 199 * in their interrupt routine themselves. 200 */ 201 struct ifnet { 202 void *if_softc; /* pointer to driver state */ 203 void *if_l2com; /* pointer to protocol bits */ 204 TAILQ_ENTRY(ifnet) if_link; /* all struct ifnets are chained */ 205 char if_xname[IFNAMSIZ]; /* external name (name + unit) */ 206 const char *if_dname; /* driver name */ 207 int if_dunit; /* unit or IF_DUNIT_NONE */ 208 void *if_vlantrunks; /* vlan trunks */ 209 struct ifaddrhead *if_addrheads; /* array[NCPU] of TAILQs of addresses per if */ 210 int if_pcount; /* number of promiscuous listeners */ 211 void *if_carp; /* carp interfaces */ 212 struct bpf_if *if_bpf; /* packet filter structure */ 213 u_short if_index; /* numeric abbreviation for this if */ 214 short if_timer; /* time 'til if_watchdog called */ 215 int if_flags; /* up/down, broadcast, etc. */ 216 int if_capabilities; /* interface capabilities */ 217 int if_capenable; /* enabled features */ 218 void *if_linkmib; /* link-type-specific MIB data */ 219 size_t if_linkmiblen; /* length of above data */ 220 struct if_data if_data; 221 struct ifmultihead if_multiaddrs; /* multicast addresses configured */ 222 int if_amcount; /* number of all-multicast requests */ 223 /* procedure handles */ 224 int (*if_output) /* output routine (enqueue) */ 225 (struct ifnet *, struct mbuf *, struct sockaddr *, 226 struct rtentry *); 227 void (*if_input) /* input routine from hardware driver */ 228 (struct ifnet *, struct mbuf *); 229 void (*if_start) /* initiate output routine */ 230 (struct ifnet *); 231 int (*if_ioctl) /* ioctl routine */ 232 (struct ifnet *, u_long, caddr_t, struct ucred *); 233 void (*if_watchdog) /* timer routine */ 234 (struct ifnet *); 235 void (*if_init) /* Init routine */ 236 (void *); 237 int (*if_resolvemulti) /* validate/resolve multicast */ 238 (struct ifnet *, struct sockaddr **, struct sockaddr *); 239 int (*if_start_cpuid) /* cpuid to run if_start */ 240 (struct ifnet *); 241 TAILQ_HEAD(, ifg_list) if_groups; /* linked list of groups per if */ 242 #ifdef DEVICE_POLLING 243 void (*if_poll) /* IFF_POLLING support */ 244 (struct ifnet *, enum poll_cmd, int); 245 int if_poll_cpuid; 246 #else 247 /* Place holders */ 248 void (*if_poll_unused)(void); 249 int if_poll_cpuid_used; 250 #endif 251 void (*if_serialize) 252 (struct ifnet *, enum ifnet_serialize); 253 void (*if_deserialize) 254 (struct ifnet *, enum ifnet_serialize); 255 int (*if_tryserialize) 256 (struct ifnet *, enum ifnet_serialize); 257 #ifdef INVARIANTS 258 void (*if_serialize_assert) 259 (struct ifnet *, enum ifnet_serialize, boolean_t); 260 #else 261 /* Place holders */ 262 void (*if_serialize_unused)(void); 263 #endif 264 #ifdef IFPOLL_ENABLE 265 void (*if_qpoll) 266 (struct ifnet *, struct ifpoll_info *); 267 #else 268 /* Place holders */ 269 void (*if_qpoll_unused)(void); 270 #endif 271 struct ifaltq if_snd; /* output queue (includes altq) */ 272 struct ifprefixhead if_prefixhead; /* list of prefixes per if */ 273 const uint8_t *if_broadcastaddr; 274 void *if_bridge; /* bridge glue */ 275 void *if_afdata[AF_MAX]; 276 struct ifaddr *if_lladdr; 277 struct lwkt_serialize *if_serializer; /* serializer or MP lock */ 278 struct lwkt_serialize if_default_serializer; /* if not supplied */ 279 struct mtx if_ioctl_mtx; /* high-level ioctl serializing mutex */ 280 int if_cpuid; 281 struct netmsg_base *if_start_nmsg; /* percpu msgs to sched if_start */ 282 void *if_pf_kif; /* pf interface abstraction */ 283 union { 284 void *carp_s; /* carp structure (used by !carp ifs) */ 285 struct ifnet *carp_d; /* ptr to carpdev (used by carp ifs) */ 286 } if_carp_ptr; 287 #define if_carp if_carp_ptr.carp_s 288 #define if_carpdev if_carp_ptr.carp_d 289 }; 290 typedef void if_init_f_t (void *); 291 292 #define if_mtu if_data.ifi_mtu 293 #define if_type if_data.ifi_type 294 #define if_physical if_data.ifi_physical 295 #define if_addrlen if_data.ifi_addrlen 296 #define if_hdrlen if_data.ifi_hdrlen 297 #define if_metric if_data.ifi_metric 298 #define if_link_state if_data.ifi_link_state 299 #define if_baudrate if_data.ifi_baudrate 300 #define if_hwassist if_data.ifi_hwassist 301 #define if_ipackets if_data.ifi_ipackets 302 #define if_ierrors if_data.ifi_ierrors 303 #define if_opackets if_data.ifi_opackets 304 #define if_oerrors if_data.ifi_oerrors 305 #define if_collisions if_data.ifi_collisions 306 #define if_ibytes if_data.ifi_ibytes 307 #define if_obytes if_data.ifi_obytes 308 #define if_imcasts if_data.ifi_imcasts 309 #define if_omcasts if_data.ifi_omcasts 310 #define if_iqdrops if_data.ifi_iqdrops 311 #define if_noproto if_data.ifi_noproto 312 #define if_lastchange if_data.ifi_lastchange 313 #define if_recvquota if_data.ifi_recvquota 314 #define if_xmitquota if_data.ifi_xmitquota 315 #define if_rawoutput(if, m, sa) if_output(if, m, sa, NULL) 316 317 /* for compatibility with other BSDs */ 318 #define if_list if_link 319 320 #endif 321 322 /* 323 * Output queues (ifp->if_snd) and slow device input queues (*ifp->if_slowq) 324 * are queues of messages stored on ifqueue structures 325 * (defined above). Entries are added to and deleted from these structures 326 * by these macros, which should be called with ipl raised to splimp(). 327 */ 328 #define IF_QFULL(ifq) ((ifq)->ifq_len >= (ifq)->ifq_maxlen) 329 #define IF_DROP(ifq) ((ifq)->ifq_drops++) 330 #define IF_QLEN(ifq) ((ifq)->ifq_len) 331 #define IF_QEMPTY(ifq) (IF_QLEN(ifq) == 0) 332 333 #define IF_ENQUEUE(ifq, m) do { \ 334 (m)->m_nextpkt = 0; \ 335 if ((ifq)->ifq_tail == 0) \ 336 (ifq)->ifq_head = m; \ 337 else \ 338 (ifq)->ifq_tail->m_nextpkt = m; \ 339 (ifq)->ifq_tail = m; \ 340 (ifq)->ifq_len++; \ 341 } while (0) 342 343 #define IF_PREPEND(ifq, m) do { \ 344 (m)->m_nextpkt = (ifq)->ifq_head; \ 345 if ((ifq)->ifq_tail == 0) \ 346 (ifq)->ifq_tail = (m); \ 347 (ifq)->ifq_head = (m); \ 348 (ifq)->ifq_len++; \ 349 } while (0) 350 351 #define IF_DEQUEUE(ifq, m) do { \ 352 (m) = (ifq)->ifq_head; \ 353 if (m) { \ 354 if (((ifq)->ifq_head = (m)->m_nextpkt) == 0) \ 355 (ifq)->ifq_tail = 0; \ 356 (m)->m_nextpkt = 0; \ 357 (ifq)->ifq_len--; \ 358 } \ 359 } while (0) 360 361 #define IF_POLL(ifq, m) ((m) = (ifq)->ifq_head) 362 363 #define IF_DRAIN(ifq) do { \ 364 struct mbuf *m; \ 365 while (1) { \ 366 IF_DEQUEUE(ifq, m); \ 367 if (m == NULL) \ 368 break; \ 369 m_freem(m); \ 370 } \ 371 } while (0) 372 373 #ifdef _KERNEL 374 375 /* interface link layer address change event */ 376 typedef void (*iflladdr_event_handler_t)(void *, struct ifnet *); 377 EVENTHANDLER_DECLARE(iflladdr_event, iflladdr_event_handler_t); 378 379 #ifdef INVARIANTS 380 #define ASSERT_IFNET_SERIALIZED_ALL(ifp) \ 381 (ifp)->if_serialize_assert((ifp), IFNET_SERIALIZE_ALL, TRUE) 382 #define ASSERT_IFNET_NOT_SERIALIZED_ALL(ifp) \ 383 (ifp)->if_serialize_assert((ifp), IFNET_SERIALIZE_ALL, FALSE) 384 385 #define ASSERT_IFNET_SERIALIZED_TX(ifp) \ 386 (ifp)->if_serialize_assert((ifp), IFNET_SERIALIZE_TX, TRUE) 387 #define ASSERT_IFNET_NOT_SERIALIZED_TX(ifp) \ 388 (ifp)->if_serialize_assert((ifp), IFNET_SERIALIZE_TX, FALSE) 389 390 #define ASSERT_IFNET_SERIALIZED_MAIN(ifp) \ 391 (ifp)->if_serialize_assert((ifp), IFNET_SERIALIZE_MAIN, TRUE) 392 #define ASSERT_IFNET_NOT_SERIALIZED_MAIN(ifp) \ 393 (ifp)->if_serialize_assert((ifp), IFNET_SERIALIZE_MAIN, FALSE) 394 #else 395 #define ASSERT_IFNET_SERIALIZED_ALL(ifp) ((void)0) 396 #define ASSERT_IFNET_NOT_SERIALIZED_ALL(ifp) ((void)0) 397 #define ASSERT_IFNET_SERIALIZED_TX(ifp) ((void)0) 398 #define ASSERT_IFNET_NOT_SERIALIZED_TX(ifp) ((void)0) 399 #define ASSERT_IFNET_SERIALIZED_MAIN(ifp) ((void)0) 400 #define ASSERT_IFNET_NOT_SERIALIZED_MAIN(ifp) ((void)0) 401 #endif 402 403 static __inline void 404 ifnet_serialize_all(struct ifnet *_ifp) 405 { 406 _ifp->if_serialize(_ifp, IFNET_SERIALIZE_ALL); 407 } 408 409 static __inline void 410 ifnet_deserialize_all(struct ifnet *_ifp) 411 { 412 _ifp->if_deserialize(_ifp, IFNET_SERIALIZE_ALL); 413 } 414 415 static __inline int 416 ifnet_tryserialize_all(struct ifnet *_ifp) 417 { 418 return _ifp->if_tryserialize(_ifp, IFNET_SERIALIZE_ALL); 419 } 420 421 static __inline void 422 ifnet_serialize_tx(struct ifnet *_ifp) 423 { 424 _ifp->if_serialize(_ifp, IFNET_SERIALIZE_TX); 425 } 426 427 static __inline void 428 ifnet_deserialize_tx(struct ifnet *_ifp) 429 { 430 _ifp->if_deserialize(_ifp, IFNET_SERIALIZE_TX); 431 } 432 433 static __inline int 434 ifnet_tryserialize_tx(struct ifnet *_ifp) 435 { 436 return _ifp->if_tryserialize(_ifp, IFNET_SERIALIZE_TX); 437 } 438 439 static __inline void 440 ifnet_serialize_main(struct ifnet *_ifp) 441 { 442 _ifp->if_serialize(_ifp, IFNET_SERIALIZE_MAIN); 443 } 444 445 static __inline void 446 ifnet_deserialize_main(struct ifnet *_ifp) 447 { 448 _ifp->if_deserialize(_ifp, IFNET_SERIALIZE_MAIN); 449 } 450 451 static __inline int 452 ifnet_tryserialize_main(struct ifnet *_ifp) 453 { 454 return _ifp->if_tryserialize(_ifp, IFNET_SERIALIZE_MAIN); 455 } 456 457 /* 458 * DEPRECATED - should not be used by any new driver. This code uses the 459 * old queueing interface and if_start ABI and does not use the ifp's 460 * serializer. 461 */ 462 #define IF_HANDOFF(ifq, m, ifp) if_handoff(ifq, m, ifp, 0) 463 #define IF_HANDOFF_ADJ(ifq, m, ifp, adj) if_handoff(ifq, m, ifp, adj) 464 465 static __inline int 466 if_handoff(struct ifqueue *_ifq, struct mbuf *_m, struct ifnet *_ifp, 467 int _adjust) 468 { 469 int _need_if_start = 0; 470 471 crit_enter(); 472 473 if (IF_QFULL(_ifq)) { 474 IF_DROP(_ifq); 475 crit_exit(); 476 m_freem(_m); 477 return (0); 478 } 479 if (_ifp != NULL) { 480 _ifp->if_obytes += _m->m_pkthdr.len + _adjust; 481 if (_m->m_flags & M_MCAST) 482 _ifp->if_omcasts++; 483 _need_if_start = !(_ifp->if_flags & IFF_OACTIVE); 484 } 485 IF_ENQUEUE(_ifq, _m); 486 if (_need_if_start) { 487 (*_ifp->if_start)(_ifp); 488 } 489 crit_exit(); 490 return (1); 491 } 492 493 /* 494 * 72 was chosen below because it is the size of a TCP/IP 495 * header (40) + the minimum mss (32). 496 */ 497 #define IF_MINMTU 72 498 #define IF_MAXMTU 65535 499 500 #endif /* _KERNEL */ 501 502 struct in_ifaddr; 503 504 struct in_ifaddr_container { 505 struct in_ifaddr *ia; 506 LIST_ENTRY(in_ifaddr_container) ia_hash; 507 /* entry in bucket of inet addresses */ 508 TAILQ_ENTRY(in_ifaddr_container) ia_link; 509 /* list of internet addresses */ 510 struct ifaddr_container *ia_ifac; /* parent ifaddr_container */ 511 }; 512 513 struct ifaddr_container { 514 #define IFA_CONTAINER_MAGIC 0x19810219 515 #define IFA_CONTAINER_DEAD 0xc0dedead 516 uint32_t ifa_magic; /* IFA_CONTAINER_MAGIC */ 517 struct ifaddr *ifa; 518 TAILQ_ENTRY(ifaddr_container) ifa_link; /* queue macro glue */ 519 u_int ifa_refcnt; /* references to this structure */ 520 uint16_t ifa_listmask; /* IFA_LIST_ */ 521 uint16_t ifa_prflags; /* protocol specific flags */ 522 523 /* 524 * Protocol specific states 525 */ 526 union { 527 struct in_ifaddr_container u_in_ifac; 528 } ifa_proto_u; 529 }; 530 531 #define IFA_LIST_IFADDRHEAD 0x01 /* on ifnet.if_addrheads[cpuid] */ 532 #define IFA_LIST_IN_IFADDRHEAD 0x02 /* on in_ifaddrheads[cpuid] */ 533 #define IFA_LIST_IN_IFADDRHASH 0x04 /* on in_ifaddrhashtbls[cpuid] */ 534 535 #define IFA_PRF_FLAG0 0x01 536 #define IFA_PRF_FLAG1 0x02 537 #define IFA_PRF_FLAG2 0x04 538 #define IFA_PRF_FLAG3 0x08 539 540 /* 541 * The ifaddr structure contains information about one address 542 * of an interface. They are maintained by the different address families, 543 * are allocated and attached when an address is set, and are linked 544 * together so all addresses for an interface can be located. 545 */ 546 struct ifaddr { 547 struct sockaddr *ifa_addr; /* address of interface */ 548 struct sockaddr *ifa_dstaddr; /* other end of p-to-p link */ 549 #define ifa_broadaddr ifa_dstaddr /* broadcast address interface */ 550 struct sockaddr *ifa_netmask; /* used to determine subnet */ 551 struct if_data if_data; /* not all members are meaningful */ 552 struct ifnet *ifa_ifp; /* back-pointer to interface */ 553 void *ifa_link_pad; 554 struct ifaddr_container *ifa_containers; 555 void (*ifa_rtrequest) /* check or clean routes (+ or -)'d */ 556 (int, struct rtentry *, struct rt_addrinfo *); 557 u_short ifa_flags; /* mostly rt_flags for cloning */ 558 int ifa_ncnt; /* # of valid ifaddr_container */ 559 int ifa_metric; /* cost of going out this interface */ 560 #ifdef notdef 561 struct rtentry *ifa_rt; /* XXXX for ROUTETOIF ????? */ 562 #endif 563 int (*ifa_claim_addr) /* check if an addr goes to this if */ 564 (struct ifaddr *, struct sockaddr *); 565 566 }; 567 #define IFA_ROUTE RTF_UP /* route installed */ 568 569 /* for compatibility with other BSDs */ 570 #define ifa_list ifa_link 571 572 /* 573 * The prefix structure contains information about one prefix 574 * of an interface. They are maintained by the different address families, 575 * are allocated and attached when an prefix or an address is set, 576 * and are linked together so all prefixes for an interface can be located. 577 */ 578 struct ifprefix { 579 struct sockaddr *ifpr_prefix; /* prefix of interface */ 580 struct ifnet *ifpr_ifp; /* back-pointer to interface */ 581 TAILQ_ENTRY(ifprefix) ifpr_list; /* queue macro glue */ 582 u_char ifpr_plen; /* prefix length in bits */ 583 u_char ifpr_type; /* protocol dependent prefix type */ 584 }; 585 586 /* 587 * Multicast address structure. This is analogous to the ifaddr 588 * structure except that it keeps track of multicast addresses. 589 * Also, the reference count here is a count of requests for this 590 * address, not a count of pointers to this structure. 591 */ 592 struct ifmultiaddr { 593 TAILQ_ENTRY(ifmultiaddr) ifma_link; /* queue macro glue */ 594 struct sockaddr *ifma_addr; /* address this membership is for */ 595 struct sockaddr *ifma_lladdr; /* link-layer translation, if any */ 596 struct ifnet *ifma_ifp; /* back-pointer to interface */ 597 u_int ifma_refcount; /* reference count */ 598 void *ifma_protospec; /* protocol-specific state, if any */ 599 }; 600 601 #ifdef _KERNEL 602 603 enum ifaddr_event { 604 IFADDR_EVENT_ADD, 605 IFADDR_EVENT_DELETE, 606 IFADDR_EVENT_CHANGE 607 }; 608 609 /* interface address change event */ 610 typedef void (*ifaddr_event_handler_t)(void *, struct ifnet *, 611 enum ifaddr_event, struct ifaddr *); 612 EVENTHANDLER_DECLARE(ifaddr_event, ifaddr_event_handler_t); 613 /* new interface attach event */ 614 typedef void (*ifnet_attach_event_handler_t)(void *, struct ifnet *); 615 EVENTHANDLER_DECLARE(ifnet_attach_event, ifnet_attach_event_handler_t); 616 /* interface detach event */ 617 typedef void (*ifnet_detach_event_handler_t)(void *, struct ifnet *); 618 EVENTHANDLER_DECLARE(ifnet_detach_event, ifnet_detach_event_handler_t); 619 620 /* 621 * interface groups 622 */ 623 struct ifg_group { 624 char ifg_group[IFNAMSIZ]; 625 u_int ifg_refcnt; 626 void *ifg_pf_kif; 627 int ifg_carp_demoted; 628 TAILQ_HEAD(, ifg_member) ifg_members; 629 TAILQ_ENTRY(ifg_group) ifg_next; 630 }; 631 632 struct ifg_member { 633 TAILQ_ENTRY(ifg_member) ifgm_next; 634 struct ifnet *ifgm_ifp; 635 }; 636 637 struct ifg_list { 638 struct ifg_group *ifgl_group; 639 TAILQ_ENTRY(ifg_list) ifgl_next; 640 }; 641 642 /* group attach event */ 643 typedef void (*group_attach_event_handler_t)(void *, struct ifg_group *); 644 EVENTHANDLER_DECLARE(group_attach_event, group_attach_event_handler_t); 645 /* group detach event */ 646 typedef void (*group_detach_event_handler_t)(void *, struct ifg_group *); 647 EVENTHANDLER_DECLARE(group_detach_event, group_detach_event_handler_t); 648 /* group change event */ 649 typedef void (*group_change_event_handler_t)(void *, const char *); 650 EVENTHANDLER_DECLARE(group_change_event, group_change_event_handler_t); 651 652 653 #ifdef INVARIANTS 654 #define ASSERT_IFAC_VALID(ifac) do { \ 655 KKASSERT((ifac)->ifa_magic == IFA_CONTAINER_MAGIC); \ 656 KKASSERT((ifac)->ifa_refcnt > 0); \ 657 } while (0) 658 #else 659 #define ASSERT_IFAC_VALID(ifac) ((void)0) 660 #endif 661 662 static __inline void 663 _IFAREF(struct ifaddr *_ifa, int _cpu_id) 664 { 665 struct ifaddr_container *_ifac = &_ifa->ifa_containers[_cpu_id]; 666 667 crit_enter(); 668 ASSERT_IFAC_VALID(_ifac); 669 ++_ifac->ifa_refcnt; 670 crit_exit(); 671 } 672 673 static __inline void 674 IFAREF(struct ifaddr *_ifa) 675 { 676 _IFAREF(_ifa, mycpuid); 677 } 678 679 #include <sys/malloc.h> 680 681 MALLOC_DECLARE(M_IFADDR); 682 MALLOC_DECLARE(M_IFMADDR); 683 MALLOC_DECLARE(M_IFNET); 684 685 void ifac_free(struct ifaddr_container *, int); 686 687 static __inline void 688 _IFAFREE(struct ifaddr *_ifa, int _cpu_id) 689 { 690 struct ifaddr_container *_ifac = &_ifa->ifa_containers[_cpu_id]; 691 692 crit_enter(); 693 ASSERT_IFAC_VALID(_ifac); 694 if (--_ifac->ifa_refcnt == 0) 695 ifac_free(_ifac, _cpu_id); 696 crit_exit(); 697 } 698 699 static __inline void 700 IFAFREE(struct ifaddr *_ifa) 701 { 702 _IFAFREE(_ifa, mycpuid); 703 } 704 705 struct lwkt_port *ifnet_portfn(int); 706 int ifnet_domsg(struct lwkt_msg *, int); 707 void ifnet_sendmsg(struct lwkt_msg *, int); 708 void ifnet_forwardmsg(struct lwkt_msg *, int); 709 struct ifnet *ifnet_byindex(unsigned short); 710 711 static __inline int 712 ifa_domsg(struct lwkt_msg *_lmsg, int _cpu) 713 { 714 return ifnet_domsg(_lmsg, _cpu); 715 } 716 717 static __inline void 718 ifa_sendmsg(struct lwkt_msg *_lmsg, int _cpu) 719 { 720 ifnet_sendmsg(_lmsg, _cpu); 721 } 722 723 static __inline void 724 ifa_forwardmsg(struct lwkt_msg *_lmsg, int _nextcpu) 725 { 726 ifnet_forwardmsg(_lmsg, _nextcpu); 727 } 728 729 #define REINPUT_KEEPRCVIF 0x0001 /* ether_reinput_oncpu() */ 730 #define REINPUT_RUNBPF 0x0002 /* ether_reinput_oncpu() */ 731 732 733 extern struct ifnethead ifnet; 734 extern struct ifnet **ifindex2ifnet; 735 extern int ifqmaxlen; 736 extern struct ifnet loif[]; 737 extern int if_index; 738 739 void ether_ifattach(struct ifnet *, uint8_t *, struct lwkt_serialize *); 740 void ether_ifattach_bpf(struct ifnet *, uint8_t *, u_int, u_int, 741 struct lwkt_serialize *); 742 void ether_ifdetach(struct ifnet *); 743 void ether_demux(struct mbuf *); 744 void ether_demux_oncpu(struct ifnet *, struct mbuf *); 745 void ether_reinput_oncpu(struct ifnet *, struct mbuf *, int); 746 void ether_input_chain(struct ifnet *, struct mbuf *, 747 const struct pktinfo *, struct mbuf_chain *); 748 void ether_input_chain_init(struct mbuf_chain *); 749 void ether_input_dispatch(struct mbuf_chain *); 750 int ether_output_frame(struct ifnet *, struct mbuf *); 751 int ether_ioctl(struct ifnet *, u_long, caddr_t); 752 struct ifnet *ether_bridge_interface(struct ifnet *ifp); 753 uint32_t ether_crc32_le(const uint8_t *, size_t); 754 uint32_t ether_crc32_be(const uint8_t *, size_t); 755 756 int if_addmulti(struct ifnet *, struct sockaddr *, struct ifmultiaddr **); 757 int if_allmulti(struct ifnet *, int); 758 void if_attach(struct ifnet *, struct lwkt_serialize *); 759 int if_delmulti(struct ifnet *, struct sockaddr *); 760 void if_delallmulti(struct ifnet *ifp); 761 void if_purgeaddrs_nolink(struct ifnet *); 762 void if_detach(struct ifnet *); 763 void if_down(struct ifnet *); 764 void if_link_state_change(struct ifnet *); 765 void if_initname(struct ifnet *, const char *, int); 766 int if_getanyethermac(uint16_t *, int); 767 int if_printf(struct ifnet *, const char *, ...) __printflike(2, 3); 768 struct ifnet *if_alloc(uint8_t); 769 void if_free(struct ifnet *); 770 void if_route(struct ifnet *, int flag, int fam); 771 int if_setlladdr(struct ifnet *, const u_char *, int); 772 void if_unroute(struct ifnet *, int flag, int fam); 773 void if_up(struct ifnet *); 774 /*void ifinit(void);*/ /* declared in systm.h for main() */ 775 int ifioctl(struct socket *, u_long, caddr_t, struct ucred *); 776 int ifpromisc(struct ifnet *, int); 777 struct ifnet *ifunit(const char *); 778 struct ifnet *if_withname(struct sockaddr *); 779 780 struct ifg_group *if_creategroup(const char *); 781 int if_addgroup(struct ifnet *, const char *); 782 int if_delgroup(struct ifnet *, const char *); 783 int if_getgroup(caddr_t, struct ifnet *); 784 int if_getgroupmembers(caddr_t); 785 786 struct ifaddr *ifa_ifwithaddr(struct sockaddr *); 787 struct ifaddr *ifa_ifwithdstaddr(struct sockaddr *); 788 struct ifaddr *ifa_ifwithnet(struct sockaddr *); 789 struct ifaddr *ifa_ifwithroute(int, struct sockaddr *, struct sockaddr *); 790 struct ifaddr *ifaof_ifpforaddr(struct sockaddr *, struct ifnet *); 791 792 typedef void *if_com_alloc_t(u_char type, struct ifnet *ifp); 793 typedef void if_com_free_t(void *com, u_char type); 794 void if_register_com_alloc(u_char, if_com_alloc_t *a, if_com_free_t *); 795 void if_deregister_com_alloc(u_char); 796 797 void *ifa_create(int, int); 798 void ifa_destroy(struct ifaddr *); 799 void ifa_iflink(struct ifaddr *, struct ifnet *, int); 800 void ifa_ifunlink(struct ifaddr *, struct ifnet *); 801 802 struct ifaddr *ifaddr_byindex(unsigned short); 803 804 struct ifmultiaddr *ifmaof_ifpforaddr(struct sockaddr *, struct ifnet *); 805 int if_simloop(struct ifnet *ifp, struct mbuf *m, int af, int hlen); 806 void if_devstart(struct ifnet *ifp); 807 808 #define IF_LLSOCKADDR(ifp) \ 809 ((struct sockaddr_dl *)(ifp)->if_lladdr->ifa_addr) 810 #define IF_LLADDR(ifp) LLADDR(IF_LLSOCKADDR(ifp)) 811 812 #ifdef DEVICE_POLLING 813 typedef void poll_handler_t (struct ifnet *ifp, enum poll_cmd cmd, int count); 814 int ether_poll_register(struct ifnet *); 815 int ether_poll_deregister(struct ifnet *); 816 int ether_pollcpu_register(struct ifnet *, int); 817 #endif /* DEVICE_POLLING */ 818 819 #ifdef IFPOLL_ENABLE 820 int ifpoll_register(struct ifnet *); 821 int ifpoll_deregister(struct ifnet *); 822 #endif /* IFPOLL_ENABLE */ 823 824 #endif /* _KERNEL */ 825 826 #endif /* !_NET_IF_VAR_H_ */ 827