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 TAILQ_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 void *if_l2com; /* pointer to protocol bits */ 199 TAILQ_ENTRY(ifnet) if_link; /* all struct ifnets are chained */ 200 char if_xname[IFNAMSIZ]; /* external name (name + unit) */ 201 const char *if_dname; /* driver name */ 202 int if_dunit; /* unit or IF_DUNIT_NONE */ 203 void *if_vlantrunks; /* vlan trunks */ 204 struct ifaddrhead *if_addrheads; /* array[NCPU] of TAILQs of addresses per if */ 205 int if_pcount; /* number of promiscuous listeners */ 206 void *if_carp; /* carp interfaces */ 207 struct bpf_if *if_bpf; /* packet filter structure */ 208 u_short if_index; /* numeric abbreviation for this if */ 209 short if_timer; /* time 'til if_watchdog called */ 210 int if_flags; /* up/down, broadcast, etc. */ 211 int if_capabilities; /* interface capabilities */ 212 int if_capenable; /* enabled features */ 213 void *if_linkmib; /* link-type-specific MIB data */ 214 size_t if_linkmiblen; /* length of above data */ 215 struct if_data if_data; 216 struct ifmultihead if_multiaddrs; /* multicast addresses configured */ 217 int if_amcount; /* number of all-multicast requests */ 218 /* procedure handles */ 219 int (*if_output) /* output routine (enqueue) */ 220 (struct ifnet *, struct mbuf *, struct sockaddr *, 221 struct rtentry *); 222 void (*if_input) /* input routine from hardware driver */ 223 (struct ifnet *, struct mbuf *); 224 void (*if_start) /* initiate output routine */ 225 (struct ifnet *); 226 int (*if_ioctl) /* ioctl routine */ 227 (struct ifnet *, u_long, caddr_t, struct ucred *); 228 void (*if_watchdog) /* timer routine */ 229 (struct ifnet *); 230 void (*if_init) /* Init routine */ 231 (void *); 232 int (*if_resolvemulti) /* validate/resolve multicast */ 233 (struct ifnet *, struct sockaddr **, struct sockaddr *); 234 int (*if_start_cpuid) /* cpuid to run if_start */ 235 (struct ifnet *); 236 TAILQ_HEAD(, ifg_list) if_groups; /* linked list of groups per if */ 237 /* protected by if_addr_mtx */ 238 #ifdef DEVICE_POLLING 239 void (*if_poll) /* IFF_POLLING support */ 240 (struct ifnet *, enum poll_cmd, int); 241 int if_poll_cpuid; 242 #else 243 /* Place holders */ 244 void (*if_poll_unused)(void); 245 int if_poll_cpuid_used; 246 #endif 247 void (*if_serialize) 248 (struct ifnet *, enum ifnet_serialize); 249 void (*if_deserialize) 250 (struct ifnet *, enum ifnet_serialize); 251 int (*if_tryserialize) 252 (struct ifnet *, enum ifnet_serialize); 253 #ifdef INVARIANTS 254 void (*if_serialize_assert) 255 (struct ifnet *, enum ifnet_serialize, boolean_t); 256 #else 257 /* Place holders */ 258 void (*if_serialize_unused)(void); 259 #endif 260 #ifdef IFPOLL_ENABLE 261 void (*if_qpoll) 262 (struct ifnet *, struct ifpoll_info *); 263 #else 264 /* Place holders */ 265 void (*if_qpoll_unused)(void); 266 #endif 267 struct ifaltq if_snd; /* output queue (includes altq) */ 268 struct ifprefixhead if_prefixhead; /* list of prefixes per if */ 269 const uint8_t *if_broadcastaddr; 270 void *if_bridge; /* bridge glue */ 271 void *if_afdata[AF_MAX]; 272 struct ifaddr *if_lladdr; 273 struct lwkt_serialize *if_serializer; /* serializer or MP lock */ 274 struct lwkt_serialize if_default_serializer; /* if not supplied */ 275 int if_cpuid; 276 struct netmsg *if_start_nmsg; /* percpu messages to schedule if_start */ 277 void *if_pf_kif; /* pf interface abstraction */ 278 }; 279 typedef void if_init_f_t (void *); 280 281 #define if_mtu if_data.ifi_mtu 282 #define if_type if_data.ifi_type 283 #define if_physical if_data.ifi_physical 284 #define if_addrlen if_data.ifi_addrlen 285 #define if_hdrlen if_data.ifi_hdrlen 286 #define if_metric if_data.ifi_metric 287 #define if_link_state if_data.ifi_link_state 288 #define if_baudrate if_data.ifi_baudrate 289 #define if_hwassist if_data.ifi_hwassist 290 #define if_ipackets if_data.ifi_ipackets 291 #define if_ierrors if_data.ifi_ierrors 292 #define if_opackets if_data.ifi_opackets 293 #define if_oerrors if_data.ifi_oerrors 294 #define if_collisions if_data.ifi_collisions 295 #define if_ibytes if_data.ifi_ibytes 296 #define if_obytes if_data.ifi_obytes 297 #define if_imcasts if_data.ifi_imcasts 298 #define if_omcasts if_data.ifi_omcasts 299 #define if_iqdrops if_data.ifi_iqdrops 300 #define if_noproto if_data.ifi_noproto 301 #define if_lastchange if_data.ifi_lastchange 302 #define if_recvquota if_data.ifi_recvquota 303 #define if_xmitquota if_data.ifi_xmitquota 304 #define if_rawoutput(if, m, sa) if_output(if, m, sa, NULL) 305 306 /* for compatibility with other BSDs */ 307 #define if_list if_link 308 309 310 /* 311 * Output queues (ifp->if_snd) and slow device input queues (*ifp->if_slowq) 312 * are queues of messages stored on ifqueue structures 313 * (defined above). Entries are added to and deleted from these structures 314 * by these macros, which should be called with ipl raised to splimp(). 315 */ 316 #define IF_QFULL(ifq) ((ifq)->ifq_len >= (ifq)->ifq_maxlen) 317 #define IF_DROP(ifq) ((ifq)->ifq_drops++) 318 #define IF_QLEN(ifq) ((ifq)->ifq_len) 319 #define IF_QEMPTY(ifq) (IF_QLEN(ifq) == 0) 320 #define IF_ENQUEUE(ifq, m) do { \ 321 (m)->m_nextpkt = 0; \ 322 if ((ifq)->ifq_tail == 0) \ 323 (ifq)->ifq_head = m; \ 324 else \ 325 (ifq)->ifq_tail->m_nextpkt = m; \ 326 (ifq)->ifq_tail = m; \ 327 (ifq)->ifq_len++; \ 328 } while (0) 329 #define IF_PREPEND(ifq, m) do { \ 330 (m)->m_nextpkt = (ifq)->ifq_head; \ 331 if ((ifq)->ifq_tail == 0) \ 332 (ifq)->ifq_tail = (m); \ 333 (ifq)->ifq_head = (m); \ 334 (ifq)->ifq_len++; \ 335 } while (0) 336 #define IF_DEQUEUE(ifq, m) do { \ 337 (m) = (ifq)->ifq_head; \ 338 if (m) { \ 339 if (((ifq)->ifq_head = (m)->m_nextpkt) == 0) \ 340 (ifq)->ifq_tail = 0; \ 341 (m)->m_nextpkt = 0; \ 342 (ifq)->ifq_len--; \ 343 } \ 344 } while (0) 345 346 #define IF_POLL(ifq, m) ((m) = (ifq)->ifq_head) 347 348 #define IF_DRAIN(ifq) do { \ 349 struct mbuf *m; \ 350 while (1) { \ 351 IF_DEQUEUE(ifq, m); \ 352 if (m == NULL) \ 353 break; \ 354 m_freem(m); \ 355 } \ 356 } while (0) 357 358 #ifdef _KERNEL 359 360 /* interface link layer address change event */ 361 typedef void (*iflladdr_event_handler_t)(void *, struct ifnet *); 362 EVENTHANDLER_DECLARE(iflladdr_event, iflladdr_event_handler_t); 363 364 #ifdef INVARIANTS 365 #define ASSERT_IFNET_SERIALIZED_ALL(ifp) \ 366 (ifp)->if_serialize_assert((ifp), IFNET_SERIALIZE_ALL, TRUE) 367 #define ASSERT_IFNET_NOT_SERIALIZED_ALL(ifp) \ 368 (ifp)->if_serialize_assert((ifp), IFNET_SERIALIZE_ALL, FALSE) 369 370 #define ASSERT_IFNET_SERIALIZED_TX(ifp) \ 371 (ifp)->if_serialize_assert((ifp), IFNET_SERIALIZE_TX, TRUE) 372 #define ASSERT_IFNET_NOT_SERIALIZED_TX(ifp) \ 373 (ifp)->if_serialize_assert((ifp), IFNET_SERIALIZE_TX, FALSE) 374 375 #define ASSERT_IFNET_SERIALIZED_MAIN(ifp) \ 376 (ifp)->if_serialize_assert((ifp), IFNET_SERIALIZE_MAIN, TRUE) 377 #define ASSERT_IFNET_NOT_SERIALIZED_MAIN(ifp) \ 378 (ifp)->if_serialize_assert((ifp), IFNET_SERIALIZE_MAIN, FALSE) 379 #else 380 #define ASSERT_IFNET_SERIALIZED_ALL(ifp) ((void)0) 381 #define ASSERT_IFNET_NOT_SERIALIZED_ALL(ifp) ((void)0) 382 #define ASSERT_IFNET_SERIALIZED_TX(ifp) ((void)0) 383 #define ASSERT_IFNET_NOT_SERIALIZED_TX(ifp) ((void)0) 384 #define ASSERT_IFNET_SERIALIZED_MAIN(ifp) ((void)0) 385 #define ASSERT_IFNET_NOT_SERIALIZED_MAIN(ifp) ((void)0) 386 #endif 387 388 static __inline void 389 ifnet_serialize_all(struct ifnet *_ifp) 390 { 391 _ifp->if_serialize(_ifp, IFNET_SERIALIZE_ALL); 392 } 393 394 static __inline void 395 ifnet_deserialize_all(struct ifnet *_ifp) 396 { 397 _ifp->if_deserialize(_ifp, IFNET_SERIALIZE_ALL); 398 } 399 400 static __inline int 401 ifnet_tryserialize_all(struct ifnet *_ifp) 402 { 403 return _ifp->if_tryserialize(_ifp, IFNET_SERIALIZE_ALL); 404 } 405 406 static __inline void 407 ifnet_serialize_tx(struct ifnet *_ifp) 408 { 409 _ifp->if_serialize(_ifp, IFNET_SERIALIZE_TX); 410 } 411 412 static __inline void 413 ifnet_deserialize_tx(struct ifnet *_ifp) 414 { 415 _ifp->if_deserialize(_ifp, IFNET_SERIALIZE_TX); 416 } 417 418 static __inline int 419 ifnet_tryserialize_tx(struct ifnet *_ifp) 420 { 421 return _ifp->if_tryserialize(_ifp, IFNET_SERIALIZE_TX); 422 } 423 424 static __inline void 425 ifnet_serialize_main(struct ifnet *_ifp) 426 { 427 _ifp->if_serialize(_ifp, IFNET_SERIALIZE_MAIN); 428 } 429 430 static __inline void 431 ifnet_deserialize_main(struct ifnet *_ifp) 432 { 433 _ifp->if_deserialize(_ifp, IFNET_SERIALIZE_MAIN); 434 } 435 436 static __inline int 437 ifnet_tryserialize_main(struct ifnet *_ifp) 438 { 439 return _ifp->if_tryserialize(_ifp, IFNET_SERIALIZE_MAIN); 440 } 441 442 /* 443 * DEPRECATED - should not be used by any new driver. This code uses the 444 * old queueing interface and if_start ABI and does not use the ifp's 445 * serializer. 446 */ 447 #define IF_HANDOFF(ifq, m, ifp) if_handoff(ifq, m, ifp, 0) 448 #define IF_HANDOFF_ADJ(ifq, m, ifp, adj) if_handoff(ifq, m, ifp, adj) 449 450 static __inline int 451 if_handoff(struct ifqueue *_ifq, struct mbuf *_m, struct ifnet *_ifp, 452 int _adjust) 453 { 454 int _need_if_start = 0; 455 456 crit_enter(); 457 458 if (IF_QFULL(_ifq)) { 459 IF_DROP(_ifq); 460 crit_exit(); 461 m_freem(_m); 462 return (0); 463 } 464 if (_ifp != NULL) { 465 _ifp->if_obytes += _m->m_pkthdr.len + _adjust; 466 if (_m->m_flags & M_MCAST) 467 _ifp->if_omcasts++; 468 _need_if_start = !(_ifp->if_flags & IFF_OACTIVE); 469 } 470 IF_ENQUEUE(_ifq, _m); 471 if (_need_if_start) { 472 (*_ifp->if_start)(_ifp); 473 } 474 crit_exit(); 475 return (1); 476 } 477 478 /* 479 * 72 was chosen below because it is the size of a TCP/IP 480 * header (40) + the minimum mss (32). 481 */ 482 #define IF_MINMTU 72 483 #define IF_MAXMTU 65535 484 485 #endif /* _KERNEL */ 486 487 struct in_ifaddr; 488 489 struct in_ifaddr_container { 490 struct in_ifaddr *ia; 491 LIST_ENTRY(in_ifaddr_container) ia_hash; 492 /* entry in bucket of inet addresses */ 493 TAILQ_ENTRY(in_ifaddr_container) ia_link; 494 /* list of internet addresses */ 495 struct ifaddr_container *ia_ifac; /* parent ifaddr_container */ 496 }; 497 498 struct ifaddr_container { 499 #define IFA_CONTAINER_MAGIC 0x19810219 500 #define IFA_CONTAINER_DEAD 0xc0dedead 501 uint32_t ifa_magic; /* IFA_CONTAINER_MAGIC */ 502 struct ifaddr *ifa; 503 TAILQ_ENTRY(ifaddr_container) ifa_link; /* queue macro glue */ 504 u_int ifa_refcnt; /* references to this structure */ 505 uint16_t ifa_listmask; /* IFA_LIST_ */ 506 uint16_t ifa_prflags; /* protocol specific flags */ 507 508 /* 509 * Protocol specific states 510 */ 511 union { 512 struct in_ifaddr_container u_in_ifac; 513 } ifa_proto_u; 514 }; 515 516 #define IFA_LIST_IFADDRHEAD 0x01 /* on ifnet.if_addrheads[cpuid] */ 517 #define IFA_LIST_IN_IFADDRHEAD 0x02 /* on in_ifaddrheads[cpuid] */ 518 #define IFA_LIST_IN_IFADDRHASH 0x04 /* on in_ifaddrhashtbls[cpuid] */ 519 520 #define IFA_PRF_FLAG0 0x01 521 #define IFA_PRF_FLAG1 0x02 522 #define IFA_PRF_FLAG2 0x04 523 #define IFA_PRF_FLAG3 0x08 524 525 /* 526 * The ifaddr structure contains information about one address 527 * of an interface. They are maintained by the different address families, 528 * are allocated and attached when an address is set, and are linked 529 * together so all addresses for an interface can be located. 530 */ 531 struct ifaddr { 532 struct sockaddr *ifa_addr; /* address of interface */ 533 struct sockaddr *ifa_dstaddr; /* other end of p-to-p link */ 534 #define ifa_broadaddr ifa_dstaddr /* broadcast address interface */ 535 struct sockaddr *ifa_netmask; /* used to determine subnet */ 536 struct if_data if_data; /* not all members are meaningful */ 537 struct ifnet *ifa_ifp; /* back-pointer to interface */ 538 void *ifa_link_pad; 539 struct ifaddr_container *ifa_containers; 540 void (*ifa_rtrequest) /* check or clean routes (+ or -)'d */ 541 (int, struct rtentry *, struct rt_addrinfo *); 542 u_short ifa_flags; /* mostly rt_flags for cloning */ 543 int ifa_ncnt; /* # of valid ifaddr_container */ 544 int ifa_metric; /* cost of going out this interface */ 545 #ifdef notdef 546 struct rtentry *ifa_rt; /* XXXX for ROUTETOIF ????? */ 547 #endif 548 int (*ifa_claim_addr) /* check if an addr goes to this if */ 549 (struct ifaddr *, struct sockaddr *); 550 551 }; 552 #define IFA_ROUTE RTF_UP /* route installed */ 553 554 /* for compatibility with other BSDs */ 555 #define ifa_list ifa_link 556 557 /* 558 * The prefix structure contains information about one prefix 559 * of an interface. They are maintained by the different address families, 560 * are allocated and attached when an prefix or an address is set, 561 * and are linked together so all prefixes for an interface can be located. 562 */ 563 struct ifprefix { 564 struct sockaddr *ifpr_prefix; /* prefix of interface */ 565 struct ifnet *ifpr_ifp; /* back-pointer to interface */ 566 TAILQ_ENTRY(ifprefix) ifpr_list; /* queue macro glue */ 567 u_char ifpr_plen; /* prefix length in bits */ 568 u_char ifpr_type; /* protocol dependent prefix type */ 569 }; 570 571 /* 572 * Multicast address structure. This is analogous to the ifaddr 573 * structure except that it keeps track of multicast addresses. 574 * Also, the reference count here is a count of requests for this 575 * address, not a count of pointers to this structure. 576 */ 577 struct ifmultiaddr { 578 TAILQ_ENTRY(ifmultiaddr) ifma_link; /* queue macro glue */ 579 struct sockaddr *ifma_addr; /* address this membership is for */ 580 struct sockaddr *ifma_lladdr; /* link-layer translation, if any */ 581 struct ifnet *ifma_ifp; /* back-pointer to interface */ 582 u_int ifma_refcount; /* reference count */ 583 void *ifma_protospec; /* protocol-specific state, if any */ 584 }; 585 586 #ifdef _KERNEL 587 588 enum ifaddr_event { 589 IFADDR_EVENT_ADD, 590 IFADDR_EVENT_DELETE, 591 IFADDR_EVENT_CHANGE 592 }; 593 594 /* interface address change event */ 595 typedef void (*ifaddr_event_handler_t)(void *, struct ifnet *, 596 enum ifaddr_event, struct ifaddr *); 597 EVENTHANDLER_DECLARE(ifaddr_event, ifaddr_event_handler_t); 598 /* new interface attach event */ 599 typedef void (*ifnet_attach_event_handler_t)(void *, struct ifnet *); 600 EVENTHANDLER_DECLARE(ifnet_attach_event, ifnet_attach_event_handler_t); 601 /* interface detach event */ 602 typedef void (*ifnet_detach_event_handler_t)(void *, struct ifnet *); 603 EVENTHANDLER_DECLARE(ifnet_detach_event, ifnet_detach_event_handler_t); 604 605 /* 606 * interface groups 607 */ 608 struct ifg_group { 609 char ifg_group[IFNAMSIZ]; 610 u_int ifg_refcnt; 611 void *ifg_pf_kif; 612 TAILQ_HEAD(, ifg_member) ifg_members; 613 TAILQ_ENTRY(ifg_group) ifg_next; 614 }; 615 616 struct ifg_member { 617 TAILQ_ENTRY(ifg_member) ifgm_next; 618 struct ifnet *ifgm_ifp; 619 }; 620 621 struct ifg_list { 622 struct ifg_group *ifgl_group; 623 TAILQ_ENTRY(ifg_list) ifgl_next; 624 }; 625 626 /* group attach event */ 627 typedef void (*group_attach_event_handler_t)(void *, struct ifg_group *); 628 EVENTHANDLER_DECLARE(group_attach_event, group_attach_event_handler_t); 629 /* group detach event */ 630 typedef void (*group_detach_event_handler_t)(void *, struct ifg_group *); 631 EVENTHANDLER_DECLARE(group_detach_event, group_detach_event_handler_t); 632 /* group change event */ 633 typedef void (*group_change_event_handler_t)(void *, const char *); 634 EVENTHANDLER_DECLARE(group_change_event, group_change_event_handler_t); 635 636 637 #ifdef INVARIANTS 638 #define ASSERT_IFAC_VALID(ifac) do { \ 639 KKASSERT((ifac)->ifa_magic == IFA_CONTAINER_MAGIC); \ 640 KKASSERT((ifac)->ifa_refcnt > 0); \ 641 } while (0) 642 #else 643 #define ASSERT_IFAC_VALID(ifac) ((void)0) 644 #endif 645 646 static __inline void 647 _IFAREF(struct ifaddr *_ifa, int _cpu_id) 648 { 649 struct ifaddr_container *_ifac = &_ifa->ifa_containers[_cpu_id]; 650 651 crit_enter(); 652 ASSERT_IFAC_VALID(_ifac); 653 ++_ifac->ifa_refcnt; 654 crit_exit(); 655 } 656 657 static __inline void 658 IFAREF(struct ifaddr *_ifa) 659 { 660 _IFAREF(_ifa, mycpuid); 661 } 662 663 #include <sys/malloc.h> 664 665 MALLOC_DECLARE(M_IFADDR); 666 MALLOC_DECLARE(M_IFMADDR); 667 MALLOC_DECLARE(M_IFNET); 668 669 void ifac_free(struct ifaddr_container *, int); 670 671 static __inline void 672 _IFAFREE(struct ifaddr *_ifa, int _cpu_id) 673 { 674 struct ifaddr_container *_ifac = &_ifa->ifa_containers[_cpu_id]; 675 676 crit_enter(); 677 ASSERT_IFAC_VALID(_ifac); 678 if (--_ifac->ifa_refcnt == 0) 679 ifac_free(_ifac, _cpu_id); 680 crit_exit(); 681 } 682 683 static __inline void 684 IFAFREE(struct ifaddr *_ifa) 685 { 686 _IFAFREE(_ifa, mycpuid); 687 } 688 689 struct lwkt_port *ifnet_portfn(int); 690 int ifnet_domsg(struct lwkt_msg *, int); 691 void ifnet_sendmsg(struct lwkt_msg *, int); 692 void ifnet_forwardmsg(struct lwkt_msg *, int); 693 struct ifnet *ifnet_byindex(unsigned short); 694 695 static __inline int 696 ifa_domsg(struct lwkt_msg *_lmsg, int _cpu) 697 { 698 return ifnet_domsg(_lmsg, _cpu); 699 } 700 701 static __inline void 702 ifa_sendmsg(struct lwkt_msg *_lmsg, int _cpu) 703 { 704 ifnet_sendmsg(_lmsg, _cpu); 705 } 706 707 static __inline void 708 ifa_forwardmsg(struct lwkt_msg *_lmsg, int _nextcpu) 709 { 710 ifnet_forwardmsg(_lmsg, _nextcpu); 711 } 712 713 extern struct ifnethead ifnet; 714 extern struct ifnet **ifindex2ifnet; 715 extern int ifqmaxlen; 716 extern struct ifnet loif[]; 717 extern int if_index; 718 719 void ether_ifattach(struct ifnet *, uint8_t *, struct lwkt_serialize *); 720 void ether_ifattach_bpf(struct ifnet *, uint8_t *, u_int, u_int, 721 struct lwkt_serialize *); 722 void ether_ifdetach(struct ifnet *); 723 void ether_demux_oncpu(struct ifnet *, struct mbuf *); 724 void ether_input_oncpu(struct ifnet *, struct mbuf *); 725 void ether_reinput_oncpu(struct ifnet *, struct mbuf *, int); 726 void ether_input_chain(struct ifnet *, struct mbuf *, 727 const struct pktinfo *, struct mbuf_chain *); 728 void ether_input_chain_init(struct mbuf_chain *); 729 void ether_input_dispatch(struct mbuf_chain *); 730 int ether_output_frame(struct ifnet *, struct mbuf *); 731 int ether_ioctl(struct ifnet *, int, caddr_t); 732 uint32_t ether_crc32_le(const uint8_t *, size_t); 733 uint32_t ether_crc32_be(const uint8_t *, size_t); 734 735 int if_addmulti(struct ifnet *, struct sockaddr *, struct ifmultiaddr **); 736 int if_allmulti(struct ifnet *, int); 737 void if_attach(struct ifnet *, struct lwkt_serialize *); 738 int if_delmulti(struct ifnet *, struct sockaddr *); 739 void if_delallmulti(struct ifnet *ifp); 740 void if_purgeaddrs_nolink(struct ifnet *); 741 void if_detach(struct ifnet *); 742 void if_down(struct ifnet *); 743 void if_link_state_change(struct ifnet *); 744 void if_initname(struct ifnet *, const char *, int); 745 int if_getanyethermac(uint16_t *, int); 746 int if_printf(struct ifnet *, const char *, ...) __printflike(2, 3); 747 struct ifnet *if_alloc(uint8_t); 748 void if_free(struct ifnet *); 749 void if_route(struct ifnet *, int flag, int fam); 750 int if_setlladdr(struct ifnet *, const u_char *, int); 751 void if_unroute(struct ifnet *, int flag, int fam); 752 void if_up(struct ifnet *); 753 /*void ifinit(void);*/ /* declared in systm.h for main() */ 754 int ifioctl(struct socket *, u_long, caddr_t, struct ucred *); 755 int ifpromisc(struct ifnet *, int); 756 struct ifnet *ifunit(const char *); 757 struct ifnet *if_withname(struct sockaddr *); 758 759 struct ifaddr *ifa_ifwithaddr(struct sockaddr *); 760 struct ifaddr *ifa_ifwithdstaddr(struct sockaddr *); 761 struct ifaddr *ifa_ifwithnet(struct sockaddr *); 762 struct ifaddr *ifa_ifwithroute(int, struct sockaddr *, struct sockaddr *); 763 struct ifaddr *ifaof_ifpforaddr(struct sockaddr *, struct ifnet *); 764 765 typedef void *if_com_alloc_t(u_char type, struct ifnet *ifp); 766 typedef void if_com_free_t(void *com, u_char type); 767 void if_register_com_alloc(u_char, if_com_alloc_t *a, if_com_free_t *); 768 void if_deregister_com_alloc(u_char); 769 770 void *ifa_create(int, int); 771 void ifa_destroy(struct ifaddr *); 772 void ifa_iflink(struct ifaddr *, struct ifnet *, int); 773 void ifa_ifunlink(struct ifaddr *, struct ifnet *); 774 775 struct ifaddr *ifaddr_byindex(unsigned short); 776 777 struct ifmultiaddr *ifmaof_ifpforaddr(struct sockaddr *, struct ifnet *); 778 int if_simloop(struct ifnet *ifp, struct mbuf *m, int af, int hlen); 779 void if_devstart(struct ifnet *ifp); 780 781 #define IF_LLSOCKADDR(ifp) \ 782 ((struct sockaddr_dl *)(ifp)->if_lladdr->ifa_addr) 783 #define IF_LLADDR(ifp) LLADDR(IF_LLSOCKADDR(ifp)) 784 785 #ifdef DEVICE_POLLING 786 typedef void poll_handler_t (struct ifnet *ifp, enum poll_cmd cmd, int count); 787 int ether_poll_register(struct ifnet *); 788 int ether_poll_deregister(struct ifnet *); 789 int ether_pollcpu_register(struct ifnet *, int); 790 #endif /* DEVICE_POLLING */ 791 792 #ifdef IFPOLL_ENABLE 793 int ifpoll_register(struct ifnet *); 794 int ifpoll_deregister(struct ifnet *); 795 #endif /* IFPOLL_ENABLE */ 796 797 #endif /* _KERNEL */ 798 799 #endif /* !_NET_IF_VAR_H_ */ 800