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 * 4. Neither the name of the University nor the names of its contributors 14 * may be used to endorse or promote products derived from this software 15 * without specific prior written permission. 16 * 17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 * 29 * From: @(#)if.h 8.1 (Berkeley) 6/10/93 30 * $FreeBSD: src/sys/net/if_var.h,v 1.98.2.6 2006/10/06 20:26:05 andre Exp $ 31 */ 32 33#ifndef _FBSD_COMPAT_NET_IF_VAR_H_ 34#define _FBSD_COMPAT_NET_IF_VAR_H_ 35 36/* 37 * Structures defining a network interface, providing a packet 38 * transport mechanism (ala level 0 of the PUP protocols). 39 * 40 * Each interface accepts output datagrams of a specified maximum 41 * length, and provides higher level routines with input datagrams 42 * received from its medium. 43 * 44 * Output occurs when the routine if_output is called, with three parameters: 45 * (*ifp->if_output)(ifp, m, dst, rt) 46 * Here m is the mbuf chain to be sent and dst is the destination address. 47 * The output routine encapsulates the supplied datagram if necessary, 48 * and then transmits it on its medium. 49 * 50 * On input, each interface unwraps the data received by it, and either 51 * places it on the input queue of an internetwork datagram routine 52 * and posts the associated software interrupt, or passes the datagram to a raw 53 * packet input routine. 54 * 55 * Routines exist for locating interfaces by their addresses 56 * or for locating an interface on a certain network, as well as more general 57 * routing and gateway routines maintaining information used to locate 58 * interfaces. These routines live in the files if.c and route.c 59 */ 60 61#ifdef __STDC__ 62/* 63 * Forward structure declarations for function prototypes [sic]. 64 */ 65struct mbuf; 66struct thread; 67struct rtentry; 68struct rt_addrinfo; 69struct socket; 70struct ether_header; 71struct carp_if; 72struct route; 73#endif 74 75#include <posix/net/if_dl.h> 76 77#include <sys/queue.h> /* get TAILQ macros */ 78 79#ifdef _KERNEL 80#include <sys/mbuf.h> 81#include <sys/eventhandler.h> 82#endif /* _KERNEL */ 83#include <sys/counter.h> 84#include <sys/lock.h> /* XXX */ 85#include <sys/mutex.h> /* XXX */ 86#include <sys/event.h> /* XXX */ 87#include <sys/_task.h> 88 89#define IF_DUNIT_NONE -1 90 91#include <altq/if_altq.h> 92 93typedef enum { 94 IFCOUNTER_IPACKETS = 0, 95 IFCOUNTER_IERRORS, 96 IFCOUNTER_OPACKETS, 97 IFCOUNTER_OERRORS, 98 IFCOUNTER_COLLISIONS, 99 IFCOUNTER_IBYTES, 100 IFCOUNTER_OBYTES, 101 IFCOUNTER_IMCASTS, 102 IFCOUNTER_OMCASTS, 103 IFCOUNTER_IQDROPS, 104 IFCOUNTER_OQDROPS, 105 IFCOUNTER_NOPROTO, 106 IFCOUNTERS /* Array size. */ 107} ift_counter; 108 109TAILQ_HEAD(ifnethead, ifnet); /* we use TAILQs so that the order of */ 110TAILQ_HEAD(ifaddrhead, ifaddr); /* instantiation is preserved in the list */ 111TAILQ_HEAD(ifprefixhead, ifprefix); 112TAILQ_HEAD(ifmultihead, ifmultiaddr); 113 114typedef struct ifnet * if_t; 115 116typedef void (*if_start_fn_t)(if_t); 117typedef int (*if_ioctl_fn_t)(if_t, u_long, caddr_t); 118typedef void (*if_init_fn_t)(void *); 119typedef void (*if_qflush_fn_t)(if_t); 120typedef int (*if_transmit_fn_t)(if_t, struct mbuf *); 121typedef uint64_t (*if_get_counter_t)(if_t, ift_counter); 122 123struct ifnet_hw_tsomax { 124 u_int tsomaxbytes; /* TSO total burst length limit in bytes */ 125 u_int tsomaxsegcount; /* TSO maximum segment count */ 126 u_int tsomaxsegsize; /* TSO maximum segment size in bytes */ 127}; 128 129/* Interface encap request types */ 130typedef enum { 131 IFENCAP_LL = 1 /* pre-calculate link-layer header */ 132} ife_type; 133 134/* 135 * The structure below allows to request various pre-calculated L2/L3 headers 136 * for different media. Requests varies by type (rtype field). 137 * 138 * IFENCAP_LL type: pre-calculates link header based on address family 139 * and destination lladdr. 140 * 141 * Input data fields: 142 * buf: pointer to destination buffer 143 * bufsize: buffer size 144 * flags: IFENCAP_FLAG_BROADCAST if destination is broadcast 145 * family: address family defined by AF_ constant. 146 * lladdr: pointer to link-layer address 147 * lladdr_len: length of link-layer address 148 * hdata: pointer to L3 header (optional, used for ARP requests). 149 * Output data fields: 150 * buf: encap data is stored here 151 * bufsize: resulting encap length is stored here 152 * lladdr_off: offset of link-layer address from encap hdr start 153 * hdata: L3 header may be altered if necessary 154 */ 155 156struct if_encap_req { 157 u_char *buf; /* Destination buffer (w) */ 158 size_t bufsize; /* size of provided buffer (r) */ 159 ife_type rtype; /* request type (r) */ 160 uint32_t flags; /* Request flags (r) */ 161 int family; /* Address family AF_* (r) */ 162 int lladdr_off; /* offset from header start (w) */ 163 int lladdr_len; /* lladdr length (r) */ 164 char *lladdr; /* link-level address pointer (r) */ 165 char *hdata; /* Upper layer header data (rw) */ 166}; 167 168 169/* 170 * Structure defining a queue for a network interface. 171 */ 172struct ifqueue { 173 struct mbuf *ifq_head; 174 struct mbuf *ifq_tail; 175 int ifq_len; 176 int ifq_maxlen; 177 int ifq_drops; 178 struct mtx ifq_mtx; 179}; 180 181struct device; 182 183/* 184 * Structure defining a network interface. 185 * 186 * (Would like to call this struct ``if'', but C isn't PL/1.) 187 */ 188 189struct ifnet { 190 void *if_softc; /* pointer to driver state */ 191 void *if_l2com; /* pointer to protocol bits */ 192 TAILQ_ENTRY(ifnet) if_link; /* all struct ifnets are chained */ 193 char if_xname[IFNAMSIZ]; /* external name (name + unit) */ 194 const char *if_dname; /* driver name */ 195 int if_dunit; /* unit or IF_DUNIT_NONE */ 196 struct ifaddrhead if_addrhead; /* linked list of addresses per if */ 197 /* 198 * if_addrhead is the list of all addresses associated to 199 * an interface. 200 * Some code in the kernel assumes that first element 201 * of the list has type AF_LINK, and contains sockaddr_dl 202 * addresses which store the link-level address and the name 203 * of the interface. 204 * However, access to the AF_LINK address through this 205 * field is deprecated. Use ifaddr_byindex() instead. 206 */ 207 struct knlist if_klist; /* events attached to this if */ 208 int if_pcount; /* number of promiscuous listeners */ 209 struct carp_if *if_carp; /* carp interface structure */ 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 struct ifvlantrunk *if_vlantrunk; /* pointer to 802.1q data */ 214 int if_flags; /* up/down, broadcast, etc. */ 215 int if_capabilities; /* interface capabilities */ 216 int if_capenable; /* enabled features */ 217 void *if_linkmib; /* link-type-specific MIB data */ 218 size_t if_linkmiblen; /* length of above data */ 219 struct if_data if_data; 220 struct ifmultihead if_multiaddrs; /* multicast addresses configured */ 221 int if_amcount; /* number of all-multicast requests */ 222 struct ifaddr *if_addr; /* pointer to link-level address */ 223/* procedure handles */ 224 int (*if_output) /* output routine (enqueue) */ 225 (struct ifnet *, struct mbuf *, struct sockaddr *, 226 struct route *); 227 void (*if_input) /* input routine (from h/w 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); 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_transmit) /* initiate output routine */ 240 (struct ifnet *, struct mbuf *); 241 void *if_spare1; /* spare pointer 1 */ 242 void *if_spare2; /* spare pointer 2 */ 243 void *if_spare3; /* spare pointer 3 */ 244 int if_drv_flags; /* driver-managed status flags */ 245 u_int if_spare_flags2; /* spare flags 2 */ 246 struct ifaltq if_snd; /* output queue (includes altq) */ 247 const u_int8_t *if_broadcastaddr; /* linklevel broadcast bytestring */ 248 249 void *if_bridge; /* bridge glue */ 250 251 struct lltable *lltables; /* list of L3-L2 resolution tables */ 252 253 struct label *if_label; /* interface MAC label */ 254 255 /* these are only used by IPv6 */ 256 struct ifprefixhead if_prefixhead; /* list of prefixes per if */ 257 void *if_afdata[AF_MAX]; 258 int if_afdata_initialized; 259 struct mtx if_afdata_mtx; 260 struct task if_linktask; /* task for link change events */ 261 struct mtx if_addr_mtx; /* mutex to protect address lists */ 262 263 if_qflush_fn_t if_qflush; /* flush any queue */ 264 if_get_counter_t if_get_counter; /* get counter values */ 265 int (*if_requestencap) /* make link header from request */ 266 (struct ifnet *, struct if_encap_req *); 267 268 /* 269 * Network adapter TSO limits: 270 * =========================== 271 * 272 * If the "if_hw_tsomax" field is zero the maximum segment 273 * length limit does not apply. If the "if_hw_tsomaxsegcount" 274 * or the "if_hw_tsomaxsegsize" field is zero the TSO segment 275 * count limit does not apply. If all three fields are zero, 276 * there is no TSO limit. 277 * 278 * NOTE: The TSO limits should reflect the values used in the 279 * BUSDMA tag a network adapter is using to load a mbuf chain 280 * for transmission. The TCP/IP network stack will subtract 281 * space for all linklevel and protocol level headers and 282 * ensure that the full mbuf chain passed to the network 283 * adapter fits within the given limits. 284 */ 285 u_int if_hw_tsomax; /* TSO maximum size in bytes */ 286 u_int if_hw_tsomaxsegcount; /* TSO maximum segment count */ 287 u_int if_hw_tsomaxsegsize; /* TSO maximum segment size in bytes */ 288 289 /* Haiku additions */ 290 struct sockaddr_dl if_lladdr; 291 char device_name[128]; 292 struct device *root_device; 293 struct ifqueue receive_queue; 294 sem_id receive_sem; 295 sem_id link_state_sem; 296 int32 open_count; 297 int32 flags; 298 299 /* WLAN specific additions */ 300 sem_id scan_done_sem; 301}; 302 303typedef void if_init_f_t(void *); 304 305/* 306 * XXX These aliases are terribly dangerous because they could apply 307 * to anything. 308 */ 309#define if_mtu if_data.ifi_mtu 310#define if_type if_data.ifi_type 311#define if_physical if_data.ifi_physical 312#define if_addrlen if_data.ifi_addrlen 313#define if_hdrlen if_data.ifi_hdrlen 314#define if_metric if_data.ifi_metric 315#define if_link_state if_data.ifi_link_state 316#define if_baudrate if_data.ifi_baudrate 317#define if_hwassist if_data.ifi_hwassist 318#define if_ipackets if_data.ifi_ipackets 319#define if_ierrors if_data.ifi_ierrors 320#define if_opackets if_data.ifi_opackets 321#define if_oerrors if_data.ifi_oerrors 322#define if_collisions if_data.ifi_collisions 323#define if_ibytes if_data.ifi_ibytes 324#define if_obytes if_data.ifi_obytes 325#define if_imcasts if_data.ifi_imcasts 326#define if_omcasts if_data.ifi_omcasts 327#define if_iqdrops if_data.ifi_iqdrops 328#define if_oqdrops if_data.ifi_oqdrops 329#define if_noproto if_data.ifi_noproto 330#define if_lastchange if_data.ifi_lastchange 331#define if_recvquota if_data.ifi_recvquota 332#define if_xmitquota if_data.ifi_xmitquota 333#define if_rawoutput(if, m, sa) if_output(if, m, sa, (struct route *)NULL) 334 335/* for compatibility with other BSDs */ 336#define if_addrlist if_addrhead 337#define if_list if_link 338 339/* 340 * Locks for address lists on the network interface. 341 */ 342#define IF_ADDR_LOCK_INIT(if) mtx_init(&(if)->if_addr_mtx, \ 343 "if_addr_mtx", NULL, MTX_DEF) 344#define IF_ADDR_LOCK_DESTROY(if) mtx_destroy(&(if)->if_addr_mtx) 345#define IF_ADDR_LOCK(if) mtx_lock(&(if)->if_addr_mtx) 346#define IF_ADDR_UNLOCK(if) mtx_unlock(&(if)->if_addr_mtx) 347#define IF_ADDR_LOCK_ASSERT(if) mtx_assert(&(if)->if_addr_mtx, MA_OWNED) 348 349void if_addr_rlock(struct ifnet *ifp); /* if_addrhead */ 350void if_addr_runlock(struct ifnet *ifp); /* if_addrhead */ 351void if_maddr_rlock(struct ifnet *ifp); /* if_multiaddrs */ 352void if_maddr_runlock(struct ifnet *ifp); /* if_multiaddrs */ 353 354/* 355 * Output queues (ifp->if_snd) and slow device input queues (*ifp->if_slowq) 356 * are queues of messages stored on ifqueue structures 357 * (defined above). Entries are added to and deleted from these structures 358 * by these macros, which should be called with ipl raised to splimp(). 359 */ 360#define IF_LOCK(ifq) mtx_lock(&(ifq)->ifq_mtx) 361#define IF_UNLOCK(ifq) mtx_unlock(&(ifq)->ifq_mtx) 362#define IF_LOCK_ASSERT(ifq) mtx_assert(&(ifq)->ifq_mtx, MA_OWNED) 363#define _IF_QFULL(ifq) ((ifq)->ifq_len >= (ifq)->ifq_maxlen) 364#define _IF_DROP(ifq) ((ifq)->ifq_drops++) 365#define _IF_QLEN(ifq) ((ifq)->ifq_len) 366 367#define _IF_ENQUEUE(ifq, m) do { \ 368 (m)->m_nextpkt = NULL; \ 369 if ((ifq)->ifq_tail == NULL) \ 370 (ifq)->ifq_head = m; \ 371 else \ 372 (ifq)->ifq_tail->m_nextpkt = m; \ 373 (ifq)->ifq_tail = m; \ 374 (ifq)->ifq_len++; \ 375} while (0) 376 377#define IF_ENQUEUE(ifq, m) do { \ 378 IF_LOCK(ifq); \ 379 _IF_ENQUEUE(ifq, m); \ 380 IF_UNLOCK(ifq); \ 381} while (0) 382 383#define _IF_PREPEND(ifq, m) do { \ 384 (m)->m_nextpkt = (ifq)->ifq_head; \ 385 if ((ifq)->ifq_tail == NULL) \ 386 (ifq)->ifq_tail = (m); \ 387 (ifq)->ifq_head = (m); \ 388 (ifq)->ifq_len++; \ 389} while (0) 390 391#define IF_PREPEND(ifq, m) do { \ 392 IF_LOCK(ifq); \ 393 _IF_PREPEND(ifq, m); \ 394 IF_UNLOCK(ifq); \ 395} while (0) 396 397#define _IF_DEQUEUE(ifq, m) do { \ 398 (m) = (ifq)->ifq_head; \ 399 if (m) { \ 400 if (((ifq)->ifq_head = (m)->m_nextpkt) == NULL) \ 401 (ifq)->ifq_tail = NULL; \ 402 (m)->m_nextpkt = NULL; \ 403 (ifq)->ifq_len--; \ 404 } \ 405} while (0) 406 407#define IF_DEQUEUE(ifq, m) do { \ 408 IF_LOCK(ifq); \ 409 _IF_DEQUEUE(ifq, m); \ 410 IF_UNLOCK(ifq); \ 411} while (0) 412 413#define _IF_POLL(ifq, m) ((m) = (ifq)->ifq_head) 414#define IF_POLL(ifq, m) _IF_POLL(ifq, m) 415 416#define _IF_DRAIN(ifq) do { \ 417 struct mbuf *m; \ 418 for (;;) { \ 419 _IF_DEQUEUE(ifq, m); \ 420 if (m == NULL) \ 421 break; \ 422 m_freem(m); \ 423 } \ 424} while (0) 425 426#define IF_DRAIN(ifq) do { \ 427 IF_LOCK(ifq); \ 428 _IF_DRAIN(ifq); \ 429 IF_UNLOCK(ifq); \ 430} while(0) 431 432#ifdef _KERNEL 433/* interface address change event */ 434typedef void (*ifaddr_event_handler_t)(void *, struct ifnet *); 435EVENTHANDLER_DECLARE(ifaddr_event, ifaddr_event_handler_t); 436/* new interface arrival event */ 437typedef void (*ifnet_arrival_event_handler_t)(void *, struct ifnet *); 438EVENTHANDLER_DECLARE(ifnet_arrival_event, ifnet_arrival_event_handler_t); 439/* interface departure event */ 440typedef void (*ifnet_departure_event_handler_t)(void *, struct ifnet *); 441EVENTHANDLER_DECLARE(ifnet_departure_event, ifnet_departure_event_handler_t); 442 443#define IF_AFDATA_LOCK_INIT(ifp) \ 444 mtx_init(&(ifp)->if_afdata_mtx, "if_afdata", NULL, MTX_DEF) 445#define IF_AFDATA_LOCK(ifp) mtx_lock(&(ifp)->if_afdata_mtx) 446#define IF_AFDATA_TRYLOCK(ifp) mtx_trylock(&(ifp)->if_afdata_mtx) 447#define IF_AFDATA_UNLOCK(ifp) mtx_unlock(&(ifp)->if_afdata_mtx) 448#define IF_AFDATA_DESTROY(ifp) mtx_destroy(&(ifp)->if_afdata_mtx) 449 450#define IFF_LOCKGIANT(ifp) do { \ 451 if ((ifp)->if_flags & IFF_NEEDSGIANT) \ 452 mtx_lock(&Giant); \ 453} while (0) 454 455#define IFF_UNLOCKGIANT(ifp) do { \ 456 if ((ifp)->if_flags & IFF_NEEDSGIANT) \ 457 mtx_unlock(&Giant); \ 458} while (0) 459 460int if_handoff(struct ifqueue *ifq, struct mbuf *m, struct ifnet *ifp, 461 int adjust); 462#define IF_HANDOFF(ifq, m, ifp) \ 463 if_handoff((struct ifqueue *)ifq, m, ifp, 0) 464#define IF_HANDOFF_ADJ(ifq, m, ifp, adj) \ 465 if_handoff((struct ifqueue *)ifq, m, ifp, adj) 466 467void if_start(struct ifnet *); 468 469#define IFQ_ENQUEUE(ifq, m, err) \ 470do { \ 471 IF_LOCK(ifq); \ 472 if (ALTQ_IS_ENABLED(ifq)) \ 473 ALTQ_ENQUEUE(ifq, m, NULL, err); \ 474 else { \ 475 if (_IF_QFULL(ifq)) { \ 476 m_freem(m); \ 477 (err) = ENOBUFS; \ 478 } else { \ 479 _IF_ENQUEUE(ifq, m); \ 480 (err) = 0; \ 481 } \ 482 } \ 483 if (err) \ 484 (ifq)->ifq_drops++; \ 485 IF_UNLOCK(ifq); \ 486} while (0) 487 488#define IFQ_DEQUEUE_NOLOCK(ifq, m) \ 489do { \ 490 if (TBR_IS_ENABLED(ifq)) \ 491 (m) = tbr_dequeue_ptr(ifq, ALTDQ_REMOVE); \ 492 else if (ALTQ_IS_ENABLED(ifq)) \ 493 ALTQ_DEQUEUE(ifq, m); \ 494 else \ 495 _IF_DEQUEUE(ifq, m); \ 496} while (0) 497 498#define IFQ_DEQUEUE(ifq, m) \ 499do { \ 500 IF_LOCK(ifq); \ 501 IFQ_DEQUEUE_NOLOCK(ifq, m); \ 502 IF_UNLOCK(ifq); \ 503} while (0) 504 505#define IFQ_POLL_NOLOCK(ifq, m) \ 506do { \ 507 if (TBR_IS_ENABLED(ifq)) \ 508 (m) = tbr_dequeue_ptr(ifq, ALTDQ_POLL); \ 509 else if (ALTQ_IS_ENABLED(ifq)) \ 510 ALTQ_POLL(ifq, m); \ 511 else \ 512 _IF_POLL(ifq, m); \ 513} while (0) 514 515#define IFQ_POLL(ifq, m) \ 516do { \ 517 IF_LOCK(ifq); \ 518 IFQ_POLL_NOLOCK(ifq, m); \ 519 IF_UNLOCK(ifq); \ 520} while (0) 521 522#define IFQ_PURGE_NOLOCK(ifq) \ 523do { \ 524 if (ALTQ_IS_ENABLED(ifq)) { \ 525 ALTQ_PURGE(ifq); \ 526 } else \ 527 _IF_DRAIN(ifq); \ 528} while (0) 529 530#define IFQ_PURGE(ifq) \ 531do { \ 532 IF_LOCK(ifq); \ 533 IFQ_PURGE_NOLOCK(ifq); \ 534 IF_UNLOCK(ifq); \ 535} while (0) 536 537#define IFQ_SET_READY(ifq) \ 538 do { ((ifq)->altq_flags |= ALTQF_READY); } while (0) 539 540#define IFQ_LOCK(ifq) IF_LOCK(ifq) 541#define IFQ_UNLOCK(ifq) IF_UNLOCK(ifq) 542#define IFQ_LOCK_ASSERT(ifq) IF_LOCK_ASSERT(ifq) 543#define IFQ_IS_EMPTY(ifq) ((ifq)->ifq_len == 0) 544#define IFQ_INC_LEN(ifq) ((ifq)->ifq_len++) 545#define IFQ_DEC_LEN(ifq) (--(ifq)->ifq_len) 546#define IFQ_INC_DROPS(ifq) ((ifq)->ifq_drops++) 547#define IFQ_SET_MAXLEN(ifq, len) ((ifq)->ifq_maxlen = (len)) 548 549/* 550 * The IFF_DRV_OACTIVE test should really occur in the device driver, not in 551 * the handoff logic, as that flag is locked by the device driver. 552 */ 553#define IFQ_HANDOFF_ADJ(ifp, m, adj, err) \ 554do { \ 555 int len; \ 556 short mflags; \ 557 \ 558 len = (m)->m_pkthdr.len; \ 559 mflags = (m)->m_flags; \ 560 IFQ_ENQUEUE(&(ifp)->if_snd, m, err); \ 561 if ((err) == 0) { \ 562 (ifp)->if_obytes += len + (adj); \ 563 if (mflags & M_MCAST) \ 564 (ifp)->if_omcasts++; \ 565 if (((ifp)->if_drv_flags & IFF_DRV_OACTIVE) == 0) \ 566 if_start(ifp); \ 567 } \ 568} while (0) 569 570#define IFQ_HANDOFF(ifp, m, err) \ 571 IFQ_HANDOFF_ADJ(ifp, m, 0, err) 572 573#define IFQ_DRV_DEQUEUE(ifq, m) \ 574do { \ 575 (m) = (ifq)->ifq_drv_head; \ 576 if (m) { \ 577 if (((ifq)->ifq_drv_head = (m)->m_nextpkt) == NULL) \ 578 (ifq)->ifq_drv_tail = NULL; \ 579 (m)->m_nextpkt = NULL; \ 580 (ifq)->ifq_drv_len--; \ 581 } else { \ 582 IFQ_LOCK(ifq); \ 583 IFQ_DEQUEUE_NOLOCK(ifq, m); \ 584 while ((ifq)->ifq_drv_len < (ifq)->ifq_drv_maxlen) { \ 585 struct mbuf *m0; \ 586 IFQ_DEQUEUE_NOLOCK(ifq, m0); \ 587 if (m0 == NULL) \ 588 break; \ 589 m0->m_nextpkt = NULL; \ 590 if ((ifq)->ifq_drv_tail == NULL) \ 591 (ifq)->ifq_drv_head = m0; \ 592 else \ 593 (ifq)->ifq_drv_tail->m_nextpkt = m0; \ 594 (ifq)->ifq_drv_tail = m0; \ 595 (ifq)->ifq_drv_len++; \ 596 } \ 597 IFQ_UNLOCK(ifq); \ 598 } \ 599} while (0) 600 601#define IFQ_DRV_PREPEND(ifq, m) \ 602do { \ 603 (m)->m_nextpkt = (ifq)->ifq_drv_head; \ 604 if ((ifq)->ifq_drv_tail == NULL) \ 605 (ifq)->ifq_drv_tail = (m); \ 606 (ifq)->ifq_drv_head = (m); \ 607 (ifq)->ifq_drv_len++; \ 608} while (0) 609 610#define IFQ_DRV_IS_EMPTY(ifq) \ 611 (((ifq)->ifq_drv_len == 0) && ((ifq)->ifq_len == 0)) 612 613#define IFQ_DRV_PURGE(ifq) \ 614do { \ 615 struct mbuf *m, *n = (ifq)->ifq_drv_head; \ 616 while((m = n) != NULL) { \ 617 n = m->m_nextpkt; \ 618 m_freem(m); \ 619 } \ 620 (ifq)->ifq_drv_head = (ifq)->ifq_drv_tail = NULL; \ 621 (ifq)->ifq_drv_len = 0; \ 622 IFQ_PURGE(ifq); \ 623} while (0) 624 625/* 626 * 72 was chosen below because it is the size of a TCP/IP 627 * header (40) + the minimum mss (32). 628 */ 629#define IF_MINMTU 72 630#define IF_MAXMTU 65535 631 632#endif /* _KERNEL */ 633 634/* 635 * The ifaddr structure contains information about one address 636 * of an interface. They are maintained by the different address families, 637 * are allocated and attached when an address is set, and are linked 638 * together so all addresses for an interface can be located. 639 * 640 * NOTE: a 'struct ifaddr' is always at the beginning of a larger 641 * chunk of malloc'ed memory, where we store the three addresses 642 * (ifa_addr, ifa_dstaddr and ifa_netmask) referenced here. 643 */ 644struct ifaddr { 645 struct sockaddr *ifa_addr; /* address of interface */ 646 struct sockaddr *ifa_dstaddr; /* other end of p-to-p link */ 647#define ifa_broadaddr ifa_dstaddr /* broadcast address interface */ 648 struct sockaddr *ifa_netmask; /* used to determine subnet */ 649 struct if_data if_data; /* not all members are meaningful */ 650 struct ifnet *ifa_ifp; /* back-pointer to interface */ 651 TAILQ_ENTRY(ifaddr) ifa_link; /* queue macro glue */ 652 void (*ifa_rtrequest) /* check or clean routes (+ or -)'d */ 653 (int, struct rtentry *, struct rt_addrinfo *); 654 u_short ifa_flags; /* mostly rt_flags for cloning */ 655 u_int ifa_refcnt; /* references to this structure */ 656 int ifa_metric; /* cost of going out this interface */ 657 int (*ifa_claim_addr) /* check if an addr goes to this if */ 658 (struct ifaddr *, struct sockaddr *); 659 struct mtx ifa_mtx; 660}; 661#define IFA_ROUTE RTF_UP /* route installed */ 662 663/* for compatibility with other BSDs */ 664#define ifa_list ifa_link 665 666 667struct ifaddr * ifa_alloc(size_t size, int flags); 668void ifa_free(struct ifaddr *ifa); 669void ifa_ref(struct ifaddr *ifa); 670 671 672#define IFA_LOCK_INIT(ifa) \ 673 mtx_init(&(ifa)->ifa_mtx, "ifaddr", NULL, MTX_DEF) 674#define IFA_LOCK(ifa) mtx_lock(&(ifa)->ifa_mtx) 675#define IFA_UNLOCK(ifa) mtx_unlock(&(ifa)->ifa_mtx) 676#define IFA_DESTROY(ifa) mtx_destroy(&(ifa)->ifa_mtx) 677 678/* 679 * The prefix structure contains information about one prefix 680 * of an interface. They are maintained by the different address families, 681 * are allocated and attached when a prefix or an address is set, 682 * and are linked together so all prefixes for an interface can be located. 683 */ 684struct ifprefix { 685 struct sockaddr *ifpr_prefix; /* prefix of interface */ 686 struct ifnet *ifpr_ifp; /* back-pointer to interface */ 687 TAILQ_ENTRY(ifprefix) ifpr_list; /* queue macro glue */ 688 u_char ifpr_plen; /* prefix length in bits */ 689 u_char ifpr_type; /* protocol dependent prefix type */ 690}; 691 692/* 693 * Multicast address structure. This is analogous to the ifaddr 694 * structure except that it keeps track of multicast addresses. 695 * Also, the reference count here is a count of requests for this 696 * address, not a count of pointers to this structure. 697 */ 698struct ifmultiaddr { 699 TAILQ_ENTRY(ifmultiaddr) ifma_link; /* queue macro glue */ 700 struct sockaddr *ifma_addr; /* address this membership is for */ 701 struct sockaddr *ifma_lladdr; /* link-layer translation, if any */ 702 struct ifnet *ifma_ifp; /* back-pointer to interface */ 703 u_int ifma_refcount; /* reference count */ 704 void *ifma_protospec; /* protocol-specific state, if any */ 705 706 /* haiku additions, save a allocation -hugo */ 707 struct sockaddr_dl ifma_addr_storage; 708}; 709 710#ifdef _KERNEL 711#define IFA_LOCK(ifa) mtx_lock(&(ifa)->ifa_mtx) 712#define IFA_UNLOCK(ifa) mtx_unlock(&(ifa)->ifa_mtx) 713 714extern struct rw_lock ifnet_rwlock; 715#define IFNET_LOCK_INIT() rw_lock_init(&ifnet_rwlock, "ifnet rwlock") 716#define IFNET_WLOCK() rw_lock_write_lock(&ifnet_rwlock) 717#define IFNET_WUNLOCK() rw_lock_write_unlock(&ifnet_rwlock) 718#define IFNET_RLOCK() rw_lock_read_lock(&ifnet_rwlock) 719#define IFNET_RLOCK_NOSLEEP() rw_lock_read_lock(&ifnet_rwlock) 720#define IFNET_RUNLOCK() rw_lock_read_unlock(&ifnet_rwlock) 721#define IFNET_RUNLOCK_NOSLEEP() rw_lock_read_unlock(&ifnet_rwlock) 722 723struct ifnet *ifnet_byindex(u_short idx); 724struct ifnet *ifnet_byindex_locked(u_short idx); 725 726extern struct ifnethead ifnet; 727extern int ifqmaxlen; 728extern struct ifnet *loif; /* first loopback interface */ 729extern int if_index; 730 731int if_addmulti(struct ifnet *, struct sockaddr *, struct ifmultiaddr **); 732int if_allmulti(struct ifnet *, int); 733struct ifnet* if_alloc(u_char); 734void if_attach(struct ifnet *); 735int if_delmulti(struct ifnet *, struct sockaddr *); 736void if_detach(struct ifnet *); 737void if_purgeaddrs(struct ifnet *); 738void if_delallmulti(struct ifnet *); 739void if_purgemaddrs(struct ifnet *); 740void if_down(struct ifnet *); 741void if_free(struct ifnet *); 742void if_free_type(struct ifnet *, u_char); 743void if_initname(struct ifnet *, const char *, int); 744void if_link_state_change(struct ifnet *, int); 745int if_printf(struct ifnet *, const char *, ...) __printflike(2, 3); 746int if_setlladdr(struct ifnet *, const u_char *, int); 747void if_up(struct ifnet *); 748/*void ifinit(void);*/ /* declared in systm.h for main() */ 749int ifioctl(struct socket *, u_long, caddr_t, struct thread *); 750int ifpromisc(struct ifnet *, int); 751struct ifnet *ifunit(const char *); 752 753/* Haiku extension for OpenBSD compat */ 754int if_alloc_inplace(struct ifnet *ifp, u_char type); 755void if_free_inplace(struct ifnet *ifp); 756 757struct ifaddr *ifa_ifwithaddr(struct sockaddr *); 758struct ifaddr *ifa_ifwithbroadaddr(struct sockaddr *); 759struct ifaddr *ifa_ifwithdstaddr(struct sockaddr *); 760struct ifaddr *ifa_ifwithnet(struct sockaddr *); 761struct ifaddr *ifa_ifwithroute(int, struct sockaddr *, struct sockaddr *); 762struct ifaddr *ifaof_ifpforaddr(struct sockaddr *, struct ifnet *); 763 764int if_simloop(struct ifnet *ifp, struct mbuf *m, int af, int hlen); 765 766typedef void *if_com_alloc_t(u_char type, struct ifnet *ifp); 767typedef void if_com_free_t(void *com, u_char type); 768void if_register_com_alloc(u_char type, if_com_alloc_t *a, if_com_free_t *f); 769void if_deregister_com_alloc(u_char type); 770void if_data_copy(struct ifnet *, struct if_data *); 771uint64_t if_get_counter_default(struct ifnet *, ift_counter); 772void if_inc_counter(struct ifnet *, ift_counter, int64_t); 773 774#define IF_LLADDR(ifp) \ 775 LLADDR((struct sockaddr_dl *)((ifp)->if_addr->ifa_addr)) 776 777uint64_t if_setbaudrate(if_t ifp, uint64_t baudrate); 778uint64_t if_getbaudrate(if_t ifp); 779int if_setcapabilities(if_t ifp, int capabilities); 780int if_setcapabilitiesbit(if_t ifp, int setbit, int clearbit); 781int if_getcapabilities(if_t ifp); 782int if_togglecapenable(if_t ifp, int togglecap); 783int if_setcapenable(if_t ifp, int capenable); 784int if_setcapenablebit(if_t ifp, int setcap, int clearcap); 785int if_getcapenable(if_t ifp); 786const char *if_getdname(if_t ifp); 787int if_setdev(if_t ifp, void *dev); 788int if_setdrvflagbits(if_t ifp, int if_setflags, int clear_flags); 789int if_getdrvflags(if_t ifp); 790int if_setdrvflags(if_t ifp, int flags); 791int if_clearhwassist(if_t ifp); 792int if_sethwassistbits(if_t ifp, int toset, int toclear); 793int if_sethwassist(if_t ifp, int hwassist_bit); 794int if_gethwassist(if_t ifp); 795int if_setsoftc(if_t ifp, void *softc); 796void *if_getsoftc(if_t ifp); 797int if_setflags(if_t ifp, int flags); 798int if_gethwaddr(if_t ifp, struct ifreq *); 799int if_setmtu(if_t ifp, int mtu); 800int if_getmtu(if_t ifp); 801int if_getmtu_family(if_t ifp, int family); 802int if_setflagbits(if_t ifp, int set, int clear); 803int if_getflags(if_t ifp); 804int if_sendq_empty(if_t ifp); 805int if_setsendqready(if_t ifp); 806int if_setsendqlen(if_t ifp, int tx_desc_count); 807int if_input(if_t ifp, struct mbuf* sendmp); 808int if_sendq_prepend(if_t ifp, struct mbuf *m); 809struct mbuf *if_dequeue(if_t ifp); 810int if_setifheaderlen(if_t ifp, int len); 811void if_setrcvif(struct mbuf *m, if_t ifp); 812 813void if_setvtag(struct mbuf *m, u_int16_t tag); 814u_int16_t if_getvtag(struct mbuf *m); 815int if_vlantrunkinuse(if_t ifp); 816caddr_t if_getlladdr(if_t ifp); 817void *if_gethandle(u_char); 818void if_bpfmtap(if_t ifp, struct mbuf *m); 819void if_etherbpfmtap(if_t ifp, struct mbuf *m); 820void if_vlancap(if_t ifp); 821 822int if_setupmultiaddr(if_t ifp, void *mta, int *cnt, int max); 823int if_multiaddr_array(if_t ifp, void *mta, int *cnt, int max); 824int if_multiaddr_count(if_t ifp, int max); 825 826/* 827 * Traversing through interface address lists. 828 */ 829struct sockaddr_dl; 830typedef u_int iflladdr_cb_t(void *, struct sockaddr_dl *, u_int); 831u_int if_foreach_lladdr(if_t, iflladdr_cb_t, void *); 832u_int if_foreach_llmaddr(if_t, iflladdr_cb_t, void *); 833u_int if_lladdr_count(if_t); 834u_int if_llmaddr_count(if_t); 835 836/* Functions */ 837void if_setinitfn(if_t ifp, void (*)(void *)); 838void if_setioctlfn(if_t ifp, int (*)(if_t, u_long, caddr_t)); 839void if_setstartfn(if_t ifp, void (*)(if_t)); 840void if_settransmitfn(if_t ifp, if_transmit_fn_t); 841void if_setqflushfn(if_t ifp, if_qflush_fn_t); 842void if_setgetcounterfn(if_t ifp, if_get_counter_t); 843 844/* accessors for struct ifreq */ 845static inline void* 846ifr_data_get_ptr(void* ifrp) 847{ 848 struct ifreq* ifr = (struct ifreq *)ifrp; 849 return ifr->ifr_data; 850} 851 852#ifdef DEVICE_POLLING 853enum poll_cmd { POLL_ONLY, POLL_AND_CHECK_STATUS }; 854 855typedef void poll_handler_t(struct ifnet *ifp, enum poll_cmd cmd, int count); 856int ether_poll_register(poll_handler_t *h, struct ifnet *ifp); 857int ether_poll_deregister(struct ifnet *ifp); 858#endif /* DEVICE_POLLING */ 859 860#endif /* _KERNEL */ 861 862#endif /* _FBSD_COMPAT_NET_IF_VAR_H_ */ 863