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