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 */ 36 37 #ifndef _NET_IF_VAR_H_ 38 #define _NET_IF_VAR_H_ 39 40 #ifndef _SYS_SERIALIZE_H_ 41 #include <sys/serialize.h> 42 #endif 43 #ifndef _NET_IF_H_ 44 #include <net/if.h> 45 #endif 46 #ifndef _SYS_MUTEX_H_ 47 #include <sys/mutex.h> 48 #endif 49 50 /* 51 * Structures defining a network interface, providing a packet 52 * transport mechanism (ala level 0 of the PUP protocols). 53 * 54 * Each interface accepts output datagrams of a specified maximum 55 * length, and provides higher level routines with input datagrams 56 * received from its medium. 57 * 58 * Output occurs when the routine if_output is called, with four parameters: 59 * ifp->if_output(ifp, m, dst, rt) 60 * Here m is the mbuf chain to be sent and dst is the destination address. 61 * The output routine encapsulates the supplied datagram if necessary, 62 * and then transmits it on its medium. 63 * 64 * On input, each interface unwraps the data received by it, and either 65 * places it on the input queue of a internetwork datagram routine 66 * and posts the associated software interrupt, or passes the datagram to 67 * the routine if_input. It is called with the mbuf chain as parameter: 68 * ifp->if_input(ifp, m) 69 * The input routine removes the protocol dependent header if necessary. 70 * 71 * Routines exist for locating interfaces by their addresses 72 * or for locating a interface on a certain network, as well as more general 73 * routing and gateway routines maintaining information used to locate 74 * interfaces. These routines live in the files if.c and route.c 75 */ 76 77 /* 78 * Forward structure declarations for function prototypes [sic]. 79 */ 80 struct mbuf; 81 struct proc; 82 struct rtentry; 83 struct rt_addrinfo; 84 struct socket; 85 struct ether_header; 86 struct ucred; 87 struct lwkt_serialize; 88 struct ifaddr_container; 89 struct ifaddr; 90 struct lwkt_port; 91 struct lwkt_msg; 92 union netmsg; 93 struct pktinfo; 94 struct ifpoll_info; 95 96 #include <sys/queue.h> /* get TAILQ macros */ 97 98 #include <net/altq/if_altq.h> 99 100 #ifdef _KERNEL 101 #include <sys/eventhandler.h> 102 #include <sys/mbuf.h> 103 #include <sys/systm.h> /* XXX */ 104 #include <sys/thread2.h> 105 #endif /* _KERNEL */ 106 107 #define IF_DUNIT_NONE -1 108 109 TAILQ_HEAD(ifnethead, ifnet); /* we use TAILQs so that the order of */ 110 TAILQ_HEAD(ifaddrhead, ifaddr_container); /* instantiation is preserved in the list */ 111 TAILQ_HEAD(ifprefixhead, ifprefix); 112 TAILQ_HEAD(ifmultihead, ifmultiaddr); 113 114 /* 115 * Structure defining a queue for a network interface. 116 */ 117 struct ifqueue { 118 struct mbuf *ifq_head; 119 struct mbuf *ifq_tail; 120 int ifq_len; 121 int ifq_maxlen; 122 int ifq_drops; 123 }; 124 125 /* 126 * Note of DEVICE_POLLING 127 * 1) Any file(*.c) that depends on DEVICE_POLLING supports in this 128 * file should include opt_polling.h at its beginning. 129 * 2) When struct changes, which are conditioned by DEVICE_POLLING, 130 * are to be introduced, please keep the struct's size and layout 131 * same, no matter whether DEVICE_POLLING is defined or not. 132 * See ifnet.if_poll and ifnet.if_poll_unused for example. 133 */ 134 135 #ifdef DEVICE_POLLING 136 enum poll_cmd { POLL_ONLY, POLL_AND_CHECK_STATUS, POLL_DEREGISTER, 137 POLL_REGISTER }; 138 #endif 139 140 enum ifnet_serialize { 141 IFNET_SERIALIZE_ALL, 142 IFNET_SERIALIZE_MAIN, 143 IFNET_SERIALIZE_TX_BASE = 0x10000000, 144 IFNET_SERIALIZE_RX_BASE = 0x20000000 145 }; 146 #define IFNET_SERIALIZE_TX IFNET_SERIALIZE_TX_BASE 147 #define IFNET_SERIALIZE_RX(i) (IFNET_SERIALIZE_RX_BASE + (i)) 148 149 #if defined(_KERNEL) || defined(_KERNEL_STRUCTURES) 150 151 /* 152 * Structure defining a network interface. 153 * 154 * (Would like to call this struct ``if'', but C isn't PL/1.) 155 */ 156 157 /* 158 * NB: For FreeBSD, it is assumed that each NIC driver's softc starts with 159 * one of these structures, typically held within an arpcom structure. 160 * 161 * struct <foo>_softc { 162 * struct arpcom { 163 * struct ifnet ac_if; 164 * ... 165 * } <arpcom> ; 166 * ... 167 * }; 168 * 169 * The assumption is used in a number of places, including many 170 * files in sys/net, device drivers, and sys/dev/mii.c:miibus_attach(). 171 * 172 * Unfortunately devices' softc are opaque, so we depend on this layout 173 * to locate the struct ifnet from the softc in the generic code. 174 * 175 * MPSAFE NOTES: 176 * 177 * ifnet is protected by calling if_serialize, if_tryserialize and 178 * if_deserialize serialize functions with the ifnet_serialize parameter. 179 * ifnet.if_snd is protected by its own spinlock. Callers of if_ioctl, 180 * if_watchdog, if_init, if_resolvemulti, and if_poll should call the 181 * ifnet serialize functions with IFNET_SERIALIZE_ALL. Callers of if_start 182 * sould call the ifnet serialize functions with IFNET_SERIALIZE_TX. 183 * 184 * FIXME: Device drivers usually use the same serializer for their interrupt 185 * FIXME: but this is not required. 186 * 187 * Caller of if_output must not serialize ifnet by calling ifnet serialize 188 * functions; if_output will call the ifnet serialize functions based on 189 * its own needs. Caller of if_input does not necessarily hold the related 190 * serializer. 191 * 192 * If a device driver installs the same serializer for its interrupt 193 * as for ifnet, then the driver only really needs to worry about further 194 * serialization in timeout based entry points. All other entry points 195 * will already be serialized. Older ISA drivers still using the old 196 * interrupt infrastructure will have to obtain and release the serializer 197 * in their interrupt routine themselves. 198 */ 199 struct ifnet { 200 void *if_softc; /* pointer to driver state */ 201 void *if_l2com; /* pointer to protocol bits */ 202 TAILQ_ENTRY(ifnet) if_link; /* all struct ifnets are chained */ 203 char if_xname[IFNAMSIZ]; /* external name (name + unit) */ 204 const char *if_dname; /* driver name */ 205 int if_dunit; /* unit or IF_DUNIT_NONE */ 206 void *if_vlantrunks; /* vlan trunks */ 207 struct ifaddrhead *if_addrheads; /* array[NCPU] of TAILQs of addresses per if */ 208 int if_pcount; /* number of promiscuous listeners */ 209 void *if_carp; /* carp interfaces */ 210 struct bpf_if *if_bpf; /* packet filter structure */ 211 u_short if_index; /* numeric abbreviation for this if */ 212 short if_timer; /* time 'til if_watchdog called */ 213 int if_flags; /* up/down, broadcast, etc. */ 214 int if_capabilities; /* interface capabilities */ 215 int if_capenable; /* enabled features */ 216 void *if_linkmib; /* link-type-specific MIB data */ 217 size_t if_linkmiblen; /* length of above data */ 218 struct if_data if_data; 219 struct ifmultihead if_multiaddrs; /* multicast addresses configured */ 220 int if_amcount; /* number of all-multicast requests */ 221 /* procedure handles */ 222 int (*if_output) /* output routine (enqueue) */ 223 (struct ifnet *, struct mbuf *, struct sockaddr *, 224 struct rtentry *); 225 void (*if_input) /* input routine from hardware driver */ 226 (struct ifnet *, struct mbuf *); 227 void (*if_start) /* initiate output routine */ 228 (struct ifnet *); 229 int (*if_ioctl) /* ioctl routine */ 230 (struct ifnet *, u_long, caddr_t, struct ucred *); 231 void (*if_watchdog) /* timer routine */ 232 (struct ifnet *); 233 void (*if_init) /* Init routine */ 234 (void *); 235 int (*if_resolvemulti) /* validate/resolve multicast */ 236 (struct ifnet *, struct sockaddr **, struct sockaddr *); 237 int (*if_start_cpuid) /* cpuid to run if_start */ 238 (struct ifnet *); 239 TAILQ_HEAD(, ifg_list) if_groups; /* linked list of groups per if */ 240 #ifdef DEVICE_POLLING 241 void (*if_poll) /* IFF_POLLING support */ 242 (struct ifnet *, enum poll_cmd, int); 243 int if_poll_cpuid; 244 #else 245 /* Place holders */ 246 void (*if_poll_unused)(void); 247 int if_poll_cpuid_used; 248 #endif 249 void (*if_serialize) 250 (struct ifnet *, enum ifnet_serialize); 251 void (*if_deserialize) 252 (struct ifnet *, enum ifnet_serialize); 253 int (*if_tryserialize) 254 (struct ifnet *, enum ifnet_serialize); 255 #ifdef INVARIANTS 256 void (*if_serialize_assert) 257 (struct ifnet *, enum ifnet_serialize, boolean_t); 258 #else 259 /* Place holders */ 260 void (*if_serialize_unused)(void); 261 #endif 262 #ifdef IFPOLL_ENABLE 263 void (*if_npoll) 264 (struct ifnet *, struct ifpoll_info *); 265 int if_npoll_cpuid; 266 #else 267 /* Place holders */ 268 void (*if_npoll_unused)(void); 269 int if_npoll_cpuid_unused; 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 void *if_unused; 284 }; 285 typedef void if_init_f_t (void *); 286 287 #define if_mtu if_data.ifi_mtu 288 #define if_type if_data.ifi_type 289 #define if_physical if_data.ifi_physical 290 #define if_addrlen if_data.ifi_addrlen 291 #define if_hdrlen if_data.ifi_hdrlen 292 #define if_metric if_data.ifi_metric 293 #define if_link_state if_data.ifi_link_state 294 #define if_baudrate if_data.ifi_baudrate 295 #define if_hwassist if_data.ifi_hwassist 296 #define if_ipackets if_data.ifi_ipackets 297 #define if_ierrors if_data.ifi_ierrors 298 #define if_opackets if_data.ifi_opackets 299 #define if_oerrors if_data.ifi_oerrors 300 #define if_collisions if_data.ifi_collisions 301 #define if_ibytes if_data.ifi_ibytes 302 #define if_obytes if_data.ifi_obytes 303 #define if_imcasts if_data.ifi_imcasts 304 #define if_omcasts if_data.ifi_omcasts 305 #define if_iqdrops if_data.ifi_iqdrops 306 #define if_noproto if_data.ifi_noproto 307 #define if_lastchange if_data.ifi_lastchange 308 #define if_recvquota if_data.ifi_recvquota 309 #define if_xmitquota if_data.ifi_xmitquota 310 #define if_rawoutput(if, m, sa) if_output(if, m, sa, NULL) 311 312 /* for compatibility with other BSDs */ 313 #define if_list if_link 314 315 #endif 316 317 /* 318 * Output queues (ifp->if_snd) and slow device input queues (*ifp->if_slowq) 319 * are queues of messages stored on ifqueue structures 320 * (defined above). Entries are added to and deleted from these structures 321 * by these macros, which should be called with ipl raised to splimp(). 322 */ 323 #define IF_QFULL(ifq) ((ifq)->ifq_len >= (ifq)->ifq_maxlen) 324 #define IF_DROP(ifq) ((ifq)->ifq_drops++) 325 #define IF_QLEN(ifq) ((ifq)->ifq_len) 326 #define IF_QEMPTY(ifq) (IF_QLEN(ifq) == 0) 327 328 #define IF_ENQUEUE(ifq, m) do { \ 329 (m)->m_nextpkt = NULL; \ 330 if ((ifq)->ifq_tail == NULL) \ 331 (ifq)->ifq_head = m; \ 332 else \ 333 (ifq)->ifq_tail->m_nextpkt = m; \ 334 (ifq)->ifq_tail = m; \ 335 (ifq)->ifq_len++; \ 336 } while (0) 337 338 #define IF_PREPEND(ifq, m) do { \ 339 (m)->m_nextpkt = (ifq)->ifq_head; \ 340 if ((ifq)->ifq_tail == NULL) \ 341 (ifq)->ifq_tail = (m); \ 342 (ifq)->ifq_head = (m); \ 343 (ifq)->ifq_len++; \ 344 } while (0) 345 346 #define IF_DEQUEUE(ifq, m) do { \ 347 (m) = (ifq)->ifq_head; \ 348 if (m) { \ 349 if (((ifq)->ifq_head = (m)->m_nextpkt) == NULL) \ 350 (ifq)->ifq_tail = NULL; \ 351 (m)->m_nextpkt = NULL; \ 352 (ifq)->ifq_len--; \ 353 } \ 354 } while (0) 355 356 #define IF_POLL(ifq, m) ((m) = (ifq)->ifq_head) 357 358 #define IF_DRAIN(ifq) do { \ 359 struct mbuf *m; \ 360 while (1) { \ 361 IF_DEQUEUE(ifq, m); \ 362 if (m == NULL) \ 363 break; \ 364 m_freem(m); \ 365 } \ 366 } while (0) 367 368 #ifdef _KERNEL 369 370 /* interface link layer address change event */ 371 typedef void (*iflladdr_event_handler_t)(void *, struct ifnet *); 372 EVENTHANDLER_DECLARE(iflladdr_event, iflladdr_event_handler_t); 373 374 #ifdef INVARIANTS 375 #define ASSERT_IFNET_SERIALIZED_ALL(ifp) \ 376 (ifp)->if_serialize_assert((ifp), IFNET_SERIALIZE_ALL, TRUE) 377 #define ASSERT_IFNET_NOT_SERIALIZED_ALL(ifp) \ 378 (ifp)->if_serialize_assert((ifp), IFNET_SERIALIZE_ALL, FALSE) 379 380 #define ASSERT_IFNET_SERIALIZED_TX(ifp) \ 381 (ifp)->if_serialize_assert((ifp), IFNET_SERIALIZE_TX, TRUE) 382 #define ASSERT_IFNET_NOT_SERIALIZED_TX(ifp) \ 383 (ifp)->if_serialize_assert((ifp), IFNET_SERIALIZE_TX, FALSE) 384 385 #define ASSERT_IFNET_SERIALIZED_MAIN(ifp) \ 386 (ifp)->if_serialize_assert((ifp), IFNET_SERIALIZE_MAIN, TRUE) 387 #define ASSERT_IFNET_NOT_SERIALIZED_MAIN(ifp) \ 388 (ifp)->if_serialize_assert((ifp), IFNET_SERIALIZE_MAIN, FALSE) 389 #else 390 #define ASSERT_IFNET_SERIALIZED_ALL(ifp) ((void)0) 391 #define ASSERT_IFNET_NOT_SERIALIZED_ALL(ifp) ((void)0) 392 #define ASSERT_IFNET_SERIALIZED_TX(ifp) ((void)0) 393 #define ASSERT_IFNET_NOT_SERIALIZED_TX(ifp) ((void)0) 394 #define ASSERT_IFNET_SERIALIZED_MAIN(ifp) ((void)0) 395 #define ASSERT_IFNET_NOT_SERIALIZED_MAIN(ifp) ((void)0) 396 #endif 397 398 static __inline void 399 ifnet_serialize_all(struct ifnet *_ifp) 400 { 401 _ifp->if_serialize(_ifp, IFNET_SERIALIZE_ALL); 402 } 403 404 static __inline void 405 ifnet_deserialize_all(struct ifnet *_ifp) 406 { 407 _ifp->if_deserialize(_ifp, IFNET_SERIALIZE_ALL); 408 } 409 410 static __inline int 411 ifnet_tryserialize_all(struct ifnet *_ifp) 412 { 413 return _ifp->if_tryserialize(_ifp, IFNET_SERIALIZE_ALL); 414 } 415 416 static __inline void 417 ifnet_serialize_tx(struct ifnet *_ifp) 418 { 419 _ifp->if_serialize(_ifp, IFNET_SERIALIZE_TX); 420 } 421 422 static __inline void 423 ifnet_deserialize_tx(struct ifnet *_ifp) 424 { 425 _ifp->if_deserialize(_ifp, IFNET_SERIALIZE_TX); 426 } 427 428 static __inline int 429 ifnet_tryserialize_tx(struct ifnet *_ifp) 430 { 431 return _ifp->if_tryserialize(_ifp, IFNET_SERIALIZE_TX); 432 } 433 434 static __inline void 435 ifnet_serialize_main(struct ifnet *_ifp) 436 { 437 _ifp->if_serialize(_ifp, IFNET_SERIALIZE_MAIN); 438 } 439 440 static __inline void 441 ifnet_deserialize_main(struct ifnet *_ifp) 442 { 443 _ifp->if_deserialize(_ifp, IFNET_SERIALIZE_MAIN); 444 } 445 446 static __inline int 447 ifnet_tryserialize_main(struct ifnet *_ifp) 448 { 449 return _ifp->if_tryserialize(_ifp, IFNET_SERIALIZE_MAIN); 450 } 451 452 /* 453 * DEPRECATED - should not be used by any new driver. This code uses the 454 * old queueing interface and if_start ABI and does not use the ifp's 455 * serializer. 456 */ 457 #define IF_HANDOFF(ifq, m, ifp) if_handoff(ifq, m, ifp, 0) 458 #define IF_HANDOFF_ADJ(ifq, m, ifp, adj) if_handoff(ifq, m, ifp, adj) 459 460 static __inline int 461 if_handoff(struct ifqueue *_ifq, struct mbuf *_m, struct ifnet *_ifp, 462 int _adjust) 463 { 464 int _need_if_start = 0; 465 466 crit_enter(); 467 468 if (IF_QFULL(_ifq)) { 469 IF_DROP(_ifq); 470 crit_exit(); 471 m_freem(_m); 472 return (0); 473 } 474 if (_ifp != NULL) { 475 _ifp->if_obytes += _m->m_pkthdr.len + _adjust; 476 if (_m->m_flags & M_MCAST) 477 _ifp->if_omcasts++; 478 _need_if_start = !(_ifp->if_flags & IFF_OACTIVE); 479 } 480 IF_ENQUEUE(_ifq, _m); 481 if (_need_if_start) { 482 (*_ifp->if_start)(_ifp); 483 } 484 crit_exit(); 485 return (1); 486 } 487 488 /* 489 * 72 was chosen below because it is the size of a TCP/IP 490 * header (40) + the minimum mss (32). 491 */ 492 #define IF_MINMTU 72 493 #define IF_MAXMTU 65535 494 495 #endif /* _KERNEL */ 496 497 struct in_ifaddr; 498 499 struct in_ifaddr_container { 500 struct in_ifaddr *ia; 501 LIST_ENTRY(in_ifaddr_container) ia_hash; 502 /* entry in bucket of inet addresses */ 503 TAILQ_ENTRY(in_ifaddr_container) ia_link; 504 /* list of internet addresses */ 505 struct ifaddr_container *ia_ifac; /* parent ifaddr_container */ 506 }; 507 508 struct ifaddr_container { 509 #define IFA_CONTAINER_MAGIC 0x19810219 510 #define IFA_CONTAINER_DEAD 0xc0dedead 511 uint32_t ifa_magic; /* IFA_CONTAINER_MAGIC */ 512 struct ifaddr *ifa; 513 TAILQ_ENTRY(ifaddr_container) ifa_link; /* queue macro glue */ 514 u_int ifa_refcnt; /* references to this structure */ 515 uint16_t ifa_listmask; /* IFA_LIST_ */ 516 uint16_t ifa_prflags; /* protocol specific flags */ 517 518 /* 519 * Protocol specific states 520 */ 521 union { 522 struct in_ifaddr_container u_in_ifac; 523 } ifa_proto_u; 524 }; 525 526 #define IFA_LIST_IFADDRHEAD 0x01 /* on ifnet.if_addrheads[cpuid] */ 527 #define IFA_LIST_IN_IFADDRHEAD 0x02 /* on in_ifaddrheads[cpuid] */ 528 #define IFA_LIST_IN_IFADDRHASH 0x04 /* on in_ifaddrhashtbls[cpuid] */ 529 530 #define IFA_PRF_FLAG0 0x01 531 #define IFA_PRF_FLAG1 0x02 532 #define IFA_PRF_FLAG2 0x04 533 #define IFA_PRF_FLAG3 0x08 534 535 /* 536 * The ifaddr structure contains information about one address 537 * of an interface. They are maintained by the different address families, 538 * are allocated and attached when an address is set, and are linked 539 * together so all addresses for an interface can be located. 540 */ 541 struct ifaddr { 542 struct sockaddr *ifa_addr; /* address of interface */ 543 struct sockaddr *ifa_dstaddr; /* other end of p-to-p link */ 544 #define ifa_broadaddr ifa_dstaddr /* broadcast address interface */ 545 struct sockaddr *ifa_netmask; /* used to determine subnet */ 546 struct if_data if_data; /* not all members are meaningful */ 547 struct ifnet *ifa_ifp; /* back-pointer to interface */ 548 void *ifa_link_pad; 549 struct ifaddr_container *ifa_containers; 550 void (*ifa_rtrequest) /* check or clean routes (+ or -)'d */ 551 (int, struct rtentry *, struct rt_addrinfo *); 552 u_short ifa_flags; /* mostly rt_flags for cloning */ 553 int ifa_ncnt; /* # of valid ifaddr_container */ 554 int ifa_metric; /* cost of going out this interface */ 555 #ifdef notdef 556 struct rtentry *ifa_rt; /* XXXX for ROUTETOIF ????? */ 557 #endif 558 int (*ifa_claim_addr) /* check if an addr goes to this if */ 559 (struct ifaddr *, struct sockaddr *); 560 561 }; 562 #define IFA_ROUTE RTF_UP /* route installed */ 563 564 /* for compatibility with other BSDs */ 565 #define ifa_list ifa_link 566 567 /* 568 * The prefix structure contains information about one prefix 569 * of an interface. They are maintained by the different address families, 570 * are allocated and attached when an prefix or an address is set, 571 * and are linked together so all prefixes for an interface can be located. 572 */ 573 struct ifprefix { 574 struct sockaddr *ifpr_prefix; /* prefix of interface */ 575 struct ifnet *ifpr_ifp; /* back-pointer to interface */ 576 TAILQ_ENTRY(ifprefix) ifpr_list; /* queue macro glue */ 577 u_char ifpr_plen; /* prefix length in bits */ 578 u_char ifpr_type; /* protocol dependent prefix type */ 579 }; 580 581 /* 582 * Multicast address structure. This is analogous to the ifaddr 583 * structure except that it keeps track of multicast addresses. 584 * Also, the reference count here is a count of requests for this 585 * address, not a count of pointers to this structure. 586 */ 587 struct ifmultiaddr { 588 TAILQ_ENTRY(ifmultiaddr) ifma_link; /* queue macro glue */ 589 struct sockaddr *ifma_addr; /* address this membership is for */ 590 struct sockaddr *ifma_lladdr; /* link-layer translation, if any */ 591 struct ifnet *ifma_ifp; /* back-pointer to interface */ 592 u_int ifma_refcount; /* reference count */ 593 void *ifma_protospec; /* protocol-specific state, if any */ 594 }; 595 596 #ifdef _KERNEL 597 598 #ifndef _SYS_SERIALIZE2_H_ 599 #include <sys/serialize2.h> 600 #endif 601 602 enum ifaddr_event { 603 IFADDR_EVENT_ADD, 604 IFADDR_EVENT_DELETE, 605 IFADDR_EVENT_CHANGE 606 }; 607 608 /* interface address change event */ 609 typedef void (*ifaddr_event_handler_t)(void *, struct ifnet *, 610 enum ifaddr_event, struct ifaddr *); 611 EVENTHANDLER_DECLARE(ifaddr_event, ifaddr_event_handler_t); 612 /* new interface attach event */ 613 typedef void (*ifnet_attach_event_handler_t)(void *, struct ifnet *); 614 EVENTHANDLER_DECLARE(ifnet_attach_event, ifnet_attach_event_handler_t); 615 /* interface detach event */ 616 typedef void (*ifnet_detach_event_handler_t)(void *, struct ifnet *); 617 EVENTHANDLER_DECLARE(ifnet_detach_event, ifnet_detach_event_handler_t); 618 619 /* 620 * interface groups 621 */ 622 struct ifg_group { 623 char ifg_group[IFNAMSIZ]; 624 u_int ifg_refcnt; 625 void *ifg_pf_kif; 626 int ifg_carp_demoted; 627 TAILQ_HEAD(, ifg_member) ifg_members; 628 TAILQ_ENTRY(ifg_group) ifg_next; 629 }; 630 631 struct ifg_member { 632 TAILQ_ENTRY(ifg_member) ifgm_next; 633 struct ifnet *ifgm_ifp; 634 }; 635 636 struct ifg_list { 637 struct ifg_group *ifgl_group; 638 TAILQ_ENTRY(ifg_list) ifgl_next; 639 }; 640 641 /* group attach event */ 642 typedef void (*group_attach_event_handler_t)(void *, struct ifg_group *); 643 EVENTHANDLER_DECLARE(group_attach_event, group_attach_event_handler_t); 644 /* group detach event */ 645 typedef void (*group_detach_event_handler_t)(void *, struct ifg_group *); 646 EVENTHANDLER_DECLARE(group_detach_event, group_detach_event_handler_t); 647 /* group change event */ 648 typedef void (*group_change_event_handler_t)(void *, const char *); 649 EVENTHANDLER_DECLARE(group_change_event, group_change_event_handler_t); 650 651 652 #ifdef INVARIANTS 653 #define ASSERT_IFAC_VALID(ifac) do { \ 654 KKASSERT((ifac)->ifa_magic == IFA_CONTAINER_MAGIC); \ 655 KKASSERT((ifac)->ifa_refcnt > 0); \ 656 } while (0) 657 #else 658 #define ASSERT_IFAC_VALID(ifac) ((void)0) 659 #endif 660 661 static __inline void 662 _IFAREF(struct ifaddr *_ifa, int _cpu_id) 663 { 664 struct ifaddr_container *_ifac = &_ifa->ifa_containers[_cpu_id]; 665 666 crit_enter(); 667 ASSERT_IFAC_VALID(_ifac); 668 ++_ifac->ifa_refcnt; 669 crit_exit(); 670 } 671 672 static __inline void 673 IFAREF(struct ifaddr *_ifa) 674 { 675 _IFAREF(_ifa, mycpuid); 676 } 677 678 #include <sys/malloc.h> 679 680 MALLOC_DECLARE(M_IFADDR); 681 MALLOC_DECLARE(M_IFMADDR); 682 MALLOC_DECLARE(M_IFNET); 683 684 void ifac_free(struct ifaddr_container *, int); 685 686 static __inline void 687 _IFAFREE(struct ifaddr *_ifa, int _cpu_id) 688 { 689 struct ifaddr_container *_ifac = &_ifa->ifa_containers[_cpu_id]; 690 691 crit_enter(); 692 ASSERT_IFAC_VALID(_ifac); 693 if (--_ifac->ifa_refcnt == 0) 694 ifac_free(_ifac, _cpu_id); 695 crit_exit(); 696 } 697 698 static __inline void 699 IFAFREE(struct ifaddr *_ifa) 700 { 701 _IFAFREE(_ifa, mycpuid); 702 } 703 704 struct lwkt_port *ifnet_portfn(int); 705 int ifnet_domsg(struct lwkt_msg *, int); 706 void ifnet_sendmsg(struct lwkt_msg *, int); 707 void ifnet_forwardmsg(struct lwkt_msg *, int); 708 struct ifnet *ifnet_byindex(unsigned short); 709 710 static __inline int 711 ifa_domsg(struct lwkt_msg *_lmsg, int _cpu) 712 { 713 return ifnet_domsg(_lmsg, _cpu); 714 } 715 716 static __inline void 717 ifa_sendmsg(struct lwkt_msg *_lmsg, int _cpu) 718 { 719 ifnet_sendmsg(_lmsg, _cpu); 720 } 721 722 static __inline void 723 ifa_forwardmsg(struct lwkt_msg *_lmsg, int _nextcpu) 724 { 725 ifnet_forwardmsg(_lmsg, _nextcpu); 726 } 727 728 static __inline int 729 ifnet_serialize_array_index(int _arrcnt, int _txoff, int _rxoff, 730 enum ifnet_serialize _slz) 731 { 732 int _off; 733 734 if (_slz == IFNET_SERIALIZE_MAIN) { 735 _off = 0; 736 } else if (_slz & IFNET_SERIALIZE_TX_BASE) { 737 _off = (_slz & ~IFNET_SERIALIZE_TX_BASE) + _txoff; 738 KASSERT(_off < _arrcnt, 739 ("invalid TX serializer %#x", _slz)); 740 } else if (_slz & IFNET_SERIALIZE_RX_BASE) { 741 _off = (_slz & ~IFNET_SERIALIZE_RX_BASE) + _rxoff; 742 KASSERT(_off < _arrcnt, 743 ("invalid RX serializer %#x", _slz)); 744 } else { 745 panic("unknown serializer %#x", _slz); 746 } 747 return _off; 748 } 749 750 static __inline void 751 ifnet_serialize_array_enter(lwkt_serialize_t *_arr, int _arrcnt, 752 int _txoff, int _rxoff, enum ifnet_serialize _slz) 753 { 754 int _off; 755 756 if (_slz == IFNET_SERIALIZE_ALL) { 757 lwkt_serialize_array_enter(_arr, _arrcnt, 0); 758 return; 759 } 760 761 _off = ifnet_serialize_array_index(_arrcnt, _txoff, _rxoff, _slz); 762 lwkt_serialize_enter(_arr[_off]); 763 } 764 765 static __inline void 766 ifnet_serialize_array_exit(lwkt_serialize_t *_arr, int _arrcnt, 767 int _txoff, int _rxoff, enum ifnet_serialize _slz) 768 { 769 int _off; 770 771 if (_slz == IFNET_SERIALIZE_ALL) { 772 lwkt_serialize_array_exit(_arr, _arrcnt, 0); 773 return; 774 } 775 776 _off = ifnet_serialize_array_index(_arrcnt, _txoff, _rxoff, _slz); 777 lwkt_serialize_exit(_arr[_off]); 778 } 779 780 static __inline int 781 ifnet_serialize_array_try(lwkt_serialize_t *_arr, int _arrcnt, 782 int _txoff, int _rxoff, enum ifnet_serialize _slz) 783 { 784 int _off; 785 786 if (_slz == IFNET_SERIALIZE_ALL) 787 return lwkt_serialize_array_try(_arr, _arrcnt, 0); 788 789 _off = ifnet_serialize_array_index(_arrcnt, _txoff, _rxoff, _slz); 790 return lwkt_serialize_try(_arr[_off]); 791 } 792 793 #ifdef INVARIANTS 794 795 static __inline void 796 ifnet_serialize_array_assert(lwkt_serialize_t *_arr, int _arrcnt, 797 int _txoff, int _rxoff, enum ifnet_serialize _slz, boolean_t _serialized) 798 { 799 int _off; 800 801 if (_slz == IFNET_SERIALIZE_ALL) { 802 int _i; 803 804 if (_serialized) { 805 for (_i = 0; _i < _arrcnt; ++_i) 806 ASSERT_SERIALIZED(_arr[_i]); 807 } else { 808 for (_i = 0; _i < _arrcnt; ++_i) 809 ASSERT_NOT_SERIALIZED(_arr[_i]); 810 } 811 return; 812 } 813 814 _off = ifnet_serialize_array_index(_arrcnt, _txoff, _rxoff, _slz); 815 if (_serialized) 816 ASSERT_SERIALIZED(_arr[_off]); 817 else 818 ASSERT_NOT_SERIALIZED(_arr[_off]); 819 } 820 821 #endif /* INVARIANTS */ 822 823 #define REINPUT_KEEPRCVIF 0x0001 /* ether_reinput_oncpu() */ 824 #define REINPUT_RUNBPF 0x0002 /* ether_reinput_oncpu() */ 825 826 extern struct ifnethead ifnet; 827 extern struct ifnet **ifindex2ifnet; 828 extern int ifqmaxlen; 829 extern struct ifnet loif[]; 830 extern int if_index; 831 832 struct ip; 833 struct tcphdr; 834 835 void ether_ifattach(struct ifnet *, uint8_t *, struct lwkt_serialize *); 836 void ether_ifattach_bpf(struct ifnet *, uint8_t *, u_int, u_int, 837 struct lwkt_serialize *); 838 void ether_ifdetach(struct ifnet *); 839 void ether_demux(struct mbuf *); 840 void ether_demux_oncpu(struct ifnet *, struct mbuf *); 841 void ether_reinput_oncpu(struct ifnet *, struct mbuf *, int); 842 void ether_input_pkt(struct ifnet *, struct mbuf *, const struct pktinfo *); 843 int ether_output_frame(struct ifnet *, struct mbuf *); 844 int ether_ioctl(struct ifnet *, u_long, caddr_t); 845 boolean_t ether_tso_pullup(struct mbuf **, int *, struct ip **, int *, 846 struct tcphdr **, int *); 847 struct ifnet *ether_bridge_interface(struct ifnet *ifp); 848 uint32_t ether_crc32_le(const uint8_t *, size_t); 849 uint32_t ether_crc32_be(const uint8_t *, size_t); 850 851 int if_addmulti(struct ifnet *, struct sockaddr *, struct ifmultiaddr **); 852 int if_allmulti(struct ifnet *, int); 853 void if_attach(struct ifnet *, struct lwkt_serialize *); 854 int if_delmulti(struct ifnet *, struct sockaddr *); 855 void if_delallmulti(struct ifnet *ifp); 856 void if_purgeaddrs_nolink(struct ifnet *); 857 void if_detach(struct ifnet *); 858 void if_down(struct ifnet *); 859 void if_link_state_change(struct ifnet *); 860 void if_initname(struct ifnet *, const char *, int); 861 int if_getanyethermac(uint16_t *, int); 862 int if_printf(struct ifnet *, const char *, ...) __printflike(2, 3); 863 struct ifnet *if_alloc(uint8_t); 864 void if_free(struct ifnet *); 865 void if_route(struct ifnet *, int flag, int fam); 866 int if_setlladdr(struct ifnet *, const u_char *, int); 867 void if_unroute(struct ifnet *, int flag, int fam); 868 void if_up(struct ifnet *); 869 /*void ifinit(void);*/ /* declared in systm.h for main() */ 870 int ifioctl(struct socket *, u_long, caddr_t, struct ucred *); 871 int ifpromisc(struct ifnet *, int); 872 struct ifnet *ifunit(const char *); 873 struct ifnet *if_withname(struct sockaddr *); 874 875 struct ifg_group *if_creategroup(const char *); 876 int if_addgroup(struct ifnet *, const char *); 877 int if_delgroup(struct ifnet *, const char *); 878 int if_getgroup(caddr_t, struct ifnet *); 879 int if_getgroupmembers(caddr_t); 880 881 struct ifaddr *ifa_ifwithaddr(struct sockaddr *); 882 struct ifaddr *ifa_ifwithdstaddr(struct sockaddr *); 883 struct ifaddr *ifa_ifwithnet(struct sockaddr *); 884 struct ifaddr *ifa_ifwithroute(int, struct sockaddr *, struct sockaddr *); 885 struct ifaddr *ifaof_ifpforaddr(struct sockaddr *, struct ifnet *); 886 887 typedef void *if_com_alloc_t(u_char type, struct ifnet *ifp); 888 typedef void if_com_free_t(void *com, u_char type); 889 void if_register_com_alloc(u_char, if_com_alloc_t *a, if_com_free_t *); 890 void if_deregister_com_alloc(u_char); 891 892 void *ifa_create(int, int); 893 void ifa_destroy(struct ifaddr *); 894 void ifa_iflink(struct ifaddr *, struct ifnet *, int); 895 void ifa_ifunlink(struct ifaddr *, struct ifnet *); 896 897 struct ifaddr *ifaddr_byindex(unsigned short); 898 899 struct ifmultiaddr *ifmaof_ifpforaddr(struct sockaddr *, struct ifnet *); 900 int if_simloop(struct ifnet *ifp, struct mbuf *m, int af, int hlen); 901 void if_devstart(struct ifnet *ifp); 902 int if_ring_count2(int cnt, int cnt_max); 903 904 #define IF_LLSOCKADDR(ifp) \ 905 ((struct sockaddr_dl *)(ifp)->if_lladdr->ifa_addr) 906 #define IF_LLADDR(ifp) LLADDR(IF_LLSOCKADDR(ifp)) 907 908 #ifdef DEVICE_POLLING 909 typedef void poll_handler_t (struct ifnet *ifp, enum poll_cmd cmd, int count); 910 int ether_poll_register(struct ifnet *); 911 int ether_poll_deregister(struct ifnet *); 912 int ether_pollcpu_register(struct ifnet *, int); 913 #endif /* DEVICE_POLLING */ 914 915 #ifdef IFPOLL_ENABLE 916 int ifpoll_register(struct ifnet *); 917 int ifpoll_deregister(struct ifnet *); 918 #endif /* IFPOLL_ENABLE */ 919 920 #endif /* _KERNEL */ 921 922 #endif /* !_NET_IF_VAR_H_ */ 923