sys/net/if_var.h

   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  * $FreeBSD$
  31  */
  32
  33 #ifndef _NET_IF_VAR_H_
  34 #define _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  */
  65 struct  mbuf;
  66 struct  thread;
  67 struct  rtentry;
  68 struct  rt_addrinfo;
  69 struct  socket;
  70 struct  ether_header;
  71 struct  carp_if;
  72 struct  carp_softc;
  73 struct  ifvlantrunk;
  74 struct  route;
  75 struct  vnet;
  76 #endif
  77
  78 #include <sys/queue.h>          /* get TAILQ macros */
  79
  80 #ifdef _KERNEL
  81 #include <sys/mbuf.h>
  82 #include <sys/eventhandler.h>
  83 #include <sys/buf_ring.h>
  84 #include <net/vnet.h>
  85 #endif /* _KERNEL */
  86 #include <sys/lock.h>           /* XXX */
  87 #include <sys/mutex.h>          /* XXX */
  88 #include <sys/rwlock.h>         /* XXX */
  89 #include <sys/sx.h>             /* XXX */
  90 #include <sys/event.h>          /* XXX */
  91 #include <sys/_task.h>
  92
  93 #define IF_DUNIT_NONE   -1
  94
  95 #include <altq/if_altq.h>
  96
  97 TAILQ_HEAD(ifnethead, ifnet);   /* we use TAILQs so that the order of */
  98 TAILQ_HEAD(ifaddrhead, ifaddr); /* instantiation is preserved in the list */
  99 TAILQ_HEAD(ifmultihead, ifmultiaddr);
 100 TAILQ_HEAD(ifgrouphead, ifg_group);
 101
 102 #ifdef _KERNEL
 103 VNET_DECLARE(struct pfil_head, link_pfil_hook); /* packet filter hooks */
 104 #define V_link_pfil_hook        VNET(link_pfil_hook)
 105 #endif /* _KERNEL */
 106
 107 typedef enum {
 108         IFCOUNTER_IPACKETS = 0,
 109         IFCOUNTER_IERRORS,
 110         IFCOUNTER_OPACKETS,
 111         IFCOUNTER_OERRORS,
 112         IFCOUNTER_COLLISIONS,
 113         IFCOUNTER_IBYTES,
 114         IFCOUNTER_OBYTES,
 115         IFCOUNTER_IMCASTS,
 116         IFCOUNTER_OMCASTS,
 117         IFCOUNTER_IQDROPS,
 118         IFCOUNTER_OQDROPS,
 119         IFCOUNTER_NOPROTO,
 120         IFCOUNTERS /* Array size. */
 121 } ift_counter;
 122
 123 /*
 124  * Structure defining a queue for a network interface.
 125  */
 126 struct  ifqueue {
 127         struct  mbuf *ifq_head;
 128         struct  mbuf *ifq_tail;
 129         int     ifq_len;
 130         int     ifq_maxlen;
 131         int     ifq_drops;
 132         struct  mtx ifq_mtx;
 133 };
 134
 135 struct ifnet_hw_tsomax {
 136         u_int   tsomaxbytes;    /* TSO total burst length limit in bytes */
 137         u_int   tsomaxsegcount; /* TSO maximum segment count */
 138         u_int   tsomaxsegsize;  /* TSO maximum segment size in bytes */
 139 };
 140
 141 /*
 142  * Structure defining a network interface.
 143  *
 144  * (Would like to call this struct ``if'', but C isn't PL/1.)
 145  */
 146
 147 struct ifnet {
 148         void    *if_softc;              /* pointer to driver state */
 149         void    *if_l2com;              /* pointer to protocol bits */
 150         struct vnet *if_vnet;           /* pointer to network stack instance */
 151         TAILQ_ENTRY(ifnet) if_link;     /* all struct ifnets are chained */
 152         char    if_xname[IFNAMSIZ];     /* external name (name + unit) */
 153         const char *if_dname;           /* driver name */
 154         int     if_dunit;               /* unit or IF_DUNIT_NONE */
 155         u_int   if_refcount;            /* reference count */
 156         struct  ifaddrhead if_addrhead; /* linked list of addresses per if */
 157                 /*
 158                  * if_addrhead is the list of all addresses associated to
 159                  * an interface.
 160                  * Some code in the kernel assumes that first element
 161                  * of the list has type AF_LINK, and contains sockaddr_dl
 162                  * addresses which store the link-level address and the name
 163                  * of the interface.
 164                  * However, access to the AF_LINK address through this
 165                  * field is deprecated. Use if_addr or ifaddr_byindex() instead.
 166                  */
 167         int     if_pcount;              /* number of promiscuous listeners */
 168         struct  carp_if *if_carp;       /* carp interface structure */
 169         struct  bpf_if *if_bpf;         /* packet filter structure */
 170         u_short if_index;               /* numeric abbreviation for this if  */
 171         short   if_index_reserved;      /* spare space to grow if_index */
 172         struct  ifvlantrunk *if_vlantrunk; /* pointer to 802.1q data */
 173         int     if_flags;               /* up/down, broadcast, etc. */
 174         int     if_capabilities;        /* interface features & capabilities */
 175         int     if_capenable;           /* enabled features & capabilities */
 176         void    *if_linkmib;            /* link-type-specific MIB data */
 177         size_t  if_linkmiblen;          /* length of above data */
 178         struct  if_data if_data;
 179         struct  ifmultihead if_multiaddrs; /* multicast addresses configured */
 180         int     if_amcount;             /* number of all-multicast requests */
 181 /* procedure handles */
 182         int     (*if_output)            /* output routine (enqueue) */
 183                 (struct ifnet *, struct mbuf *, const struct sockaddr *,
 184                      struct route *);
 185         void    (*if_input)             /* input routine (from h/w driver) */
 186                 (struct ifnet *, struct mbuf *);
 187         void    (*if_start)             /* initiate output routine */
 188                 (struct ifnet *);
 189         int     (*if_ioctl)             /* ioctl routine */
 190                 (struct ifnet *, u_long, caddr_t);
 191         void    (*if_init)              /* Init routine */
 192                 (void *);
 193         int     (*if_resolvemulti)      /* validate/resolve multicast */
 194                 (struct ifnet *, struct sockaddr **, struct sockaddr *);
 195         void    (*if_qflush)            /* flush any queues */
 196                 (struct ifnet *);
 197         int     (*if_transmit)          /* initiate output routine */
 198                 (struct ifnet *, struct mbuf *);
 199         void    (*if_reassign)          /* reassign to vnet routine */
 200                 (struct ifnet *, struct vnet *, char *);
 201         struct  vnet *if_home_vnet;     /* where this ifnet originates from */
 202         struct  ifaddr  *if_addr;       /* pointer to link-level address */
 203         void    *if_llsoftc;            /* link layer softc */
 204         int     if_drv_flags;           /* driver-managed status flags */
 205         struct  ifaltq if_snd;          /* output queue (includes altq) */
 206         const u_int8_t *if_broadcastaddr; /* linklevel broadcast bytestring */
 207
 208         void    *if_bridge;             /* bridge glue */
 209
 210         struct  label *if_label;        /* interface MAC label */
 211
 212         /* these are only used by IPv6 */
 213         void    *if_unused[2];
 214         void    *if_afdata[AF_MAX];
 215         int     if_afdata_initialized;
 216         struct  rwlock if_afdata_lock;
 217         struct  task if_linktask;       /* task for link change events */
 218         struct  rwlock if_addr_lock;    /* lock to protect address lists */
 219
 220         LIST_ENTRY(ifnet) if_clones;    /* interfaces of a cloner */
 221         TAILQ_HEAD(, ifg_list) if_groups; /* linked list of groups per if */
 222                                         /* protected by if_addr_lock */
 223         void    *if_pf_kif;
 224         void    *if_lagg;               /* lagg glue */
 225         char    *if_description;        /* interface description */
 226         u_int   if_fib;                 /* interface FIB */
 227         u_char  if_alloctype;           /* if_type at time of allocation */
 228
 229         /*
 230          * Network adapter TSO limits:
 231          * ===========================
 232          *
 233          * If the "if_hw_tsomax" field is zero the maximum segment
 234          * length limit does not apply. If the "if_hw_tsomaxsegcount"
 235          * or the "if_hw_tsomaxsegsize" field is zero the TSO segment
 236          * count limit does not apply. If all three fields are zero,
 237          * there is no TSO limit.
 238          *
 239          * NOTE: The TSO limits should reflect the values used in the
 240          * BUSDMA tag a network adapter is using to load a mbuf chain
 241          * for transmission. The TCP/IP network stack will subtract
 242          * space for all linklevel and protocol level headers and
 243          * ensure that the full mbuf chain passed to the network
 244          * adapter fits within the given limits.
 245          */
 246         u_int   if_hw_tsomax;
 247
 248         /*
 249          * Spare fields are added so that we can modify sensitive data
 250          * structures without changing the kernel binary interface, and must
 251          * be used with care where binary compatibility is required.
 252          */
 253         char    if_cspare[3];
 254         int     if_ispare[2];
 255
 256         /*
 257          * TSO fields for segment limits. If a field is zero below,
 258          * there is no limit:
 259          */
 260         u_int   if_hw_tsomaxsegcount;   /* TSO maximum segment count */
 261         u_int   if_hw_tsomaxsegsize;    /* TSO maximum segment size in bytes */
 262         void    *if_pspare[8];          /* 1 netmap, 7 TDB */
 263 };
 264
 265 typedef void if_init_f_t(void *);
 266
 267 /*
 268  * XXX These aliases are terribly dangerous because they could apply
 269  * to anything.
 270  */
 271 #define if_mtu          if_data.ifi_mtu
 272 #define if_type         if_data.ifi_type
 273 #define if_physical     if_data.ifi_physical
 274 #define if_addrlen      if_data.ifi_addrlen
 275 #define if_hdrlen       if_data.ifi_hdrlen
 276 #define if_metric       if_data.ifi_metric
 277 #define if_link_state   if_data.ifi_link_state
 278 #define if_baudrate     if_data.ifi_baudrate
 279 #define if_baudrate_pf  if_data.ifi_baudrate_pf
 280 #define if_hwassist     if_data.ifi_hwassist
 281 #define if_ipackets     if_data.ifi_ipackets
 282 #define if_ierrors      if_data.ifi_ierrors
 283 #define if_opackets     if_data.ifi_opackets
 284 #define if_oerrors      if_data.ifi_oerrors
 285 #define if_collisions   if_data.ifi_collisions
 286 #define if_ibytes       if_data.ifi_ibytes
 287 #define if_obytes       if_data.ifi_obytes
 288 #define if_imcasts      if_data.ifi_imcasts
 289 #define if_omcasts      if_data.ifi_omcasts
 290 #define if_iqdrops      if_data.ifi_iqdrops
 291 #define if_noproto      if_data.ifi_noproto
 292 #define if_lastchange   if_data.ifi_lastchange
 293
 294 /* for compatibility with other BSDs */
 295 #define if_addrlist     if_addrhead
 296 #define if_list         if_link
 297 #define if_name(ifp)    ((ifp)->if_xname)
 298
 299 /*
 300  * Locks for address lists on the network interface.
 301  */
 302 #define IF_ADDR_LOCK_INIT(if)   rw_init(&(if)->if_addr_lock, "if_addr_lock")
 303 #define IF_ADDR_LOCK_DESTROY(if)        rw_destroy(&(if)->if_addr_lock)
 304 #define IF_ADDR_WLOCK(if)       rw_wlock(&(if)->if_addr_lock)
 305 #define IF_ADDR_WUNLOCK(if)     rw_wunlock(&(if)->if_addr_lock)
 306 #define IF_ADDR_RLOCK(if)       rw_rlock(&(if)->if_addr_lock)
 307 #define IF_ADDR_RUNLOCK(if)     rw_runlock(&(if)->if_addr_lock)
 308 #define IF_ADDR_LOCK_ASSERT(if) rw_assert(&(if)->if_addr_lock, RA_LOCKED)
 309 #define IF_ADDR_WLOCK_ASSERT(if) rw_assert(&(if)->if_addr_lock, RA_WLOCKED)
 310
 311 /*
 312  * Function variations on locking macros intended to be used by loadable
 313  * kernel modules in order to divorce them from the internals of address list
 314  * locking.
 315  */
 316 void    if_addr_rlock(struct ifnet *ifp);       /* if_addrhead */
 317 void    if_addr_runlock(struct ifnet *ifp);     /* if_addrhead */
 318 void    if_maddr_rlock(struct ifnet *ifp);      /* if_multiaddrs */
 319 void    if_maddr_runlock(struct ifnet *ifp);    /* if_multiaddrs */
 320
 321 /*
 322  * Output queues (ifp->if_snd) and slow device input queues (*ifp->if_slowq)
 323  * are queues of messages stored on ifqueue structures
 324  * (defined above).  Entries are added to and deleted from these structures
 325  * by these macros.
 326  */
 327 #define IF_LOCK(ifq)            mtx_lock(&(ifq)->ifq_mtx)
 328 #define IF_UNLOCK(ifq)          mtx_unlock(&(ifq)->ifq_mtx)
 329 #define IF_LOCK_ASSERT(ifq)     mtx_assert(&(ifq)->ifq_mtx, MA_OWNED)
 330 #define _IF_QFULL(ifq)          ((ifq)->ifq_len >= (ifq)->ifq_maxlen)
 331 #define _IF_DROP(ifq)           ((ifq)->ifq_drops++)
 332 #define _IF_QLEN(ifq)           ((ifq)->ifq_len)
 333
 334 #define _IF_ENQUEUE(ifq, m) do {                                \
 335         (m)->m_nextpkt = NULL;                                  \
 336         if ((ifq)->ifq_tail == NULL)                            \
 337                 (ifq)->ifq_head = m;                            \
 338         else                                                    \
 339                 (ifq)->ifq_tail->m_nextpkt = m;                 \
 340         (ifq)->ifq_tail = m;                                    \
 341         (ifq)->ifq_len++;                                       \
 342 } while (0)
 343
 344 #define IF_ENQUEUE(ifq, m) do {                                 \
 345         IF_LOCK(ifq);                                           \
 346         _IF_ENQUEUE(ifq, m);                                    \
 347         IF_UNLOCK(ifq);                                         \
 348 } while (0)
 349
 350 #define _IF_PREPEND(ifq, m) do {                                \
 351         (m)->m_nextpkt = (ifq)->ifq_head;                       \
 352         if ((ifq)->ifq_tail == NULL)                            \
 353                 (ifq)->ifq_tail = (m);                          \
 354         (ifq)->ifq_head = (m);                                  \
 355         (ifq)->ifq_len++;                                       \
 356 } while (0)
 357
 358 #define IF_PREPEND(ifq, m) do {                                 \
 359         IF_LOCK(ifq);                                           \
 360         _IF_PREPEND(ifq, m);                                    \
 361         IF_UNLOCK(ifq);                                         \
 362 } while (0)
 363
 364 #define _IF_DEQUEUE(ifq, m) do {                                \
 365         (m) = (ifq)->ifq_head;                                  \
 366         if (m) {                                                \
 367                 if (((ifq)->ifq_head = (m)->m_nextpkt) == NULL) \
 368                         (ifq)->ifq_tail = NULL;                 \
 369                 (m)->m_nextpkt = NULL;                          \
 370                 (ifq)->ifq_len--;                               \
 371         }                                                       \
 372 } while (0)
 373
 374 #define IF_DEQUEUE(ifq, m) do {                                 \
 375         IF_LOCK(ifq);                                           \
 376         _IF_DEQUEUE(ifq, m);                                    \
 377         IF_UNLOCK(ifq);                                         \
 378 } while (0)
 379
 380 #define _IF_DEQUEUE_ALL(ifq, m) do {                            \
 381         (m) = (ifq)->ifq_head;                                  \
 382         (ifq)->ifq_head = (ifq)->ifq_tail = NULL;               \
 383         (ifq)->ifq_len = 0;                                     \
 384 } while (0)
 385
 386 #define IF_DEQUEUE_ALL(ifq, m) do {                             \
 387         IF_LOCK(ifq);                                           \
 388         _IF_DEQUEUE_ALL(ifq, m);                                \
 389         IF_UNLOCK(ifq);                                         \
 390 } while (0)
 391
 392 #define _IF_POLL(ifq, m)        ((m) = (ifq)->ifq_head)
 393 #define IF_POLL(ifq, m)         _IF_POLL(ifq, m)
 394
 395 #define _IF_DRAIN(ifq) do {                                     \
 396         struct mbuf *m;                                         \
 397         for (;;) {                                              \
 398                 _IF_DEQUEUE(ifq, m);                            \
 399                 if (m == NULL)                                  \
 400                         break;                                  \
 401                 m_freem(m);                                     \
 402         }                                                       \
 403 } while (0)
 404
 405 #define IF_DRAIN(ifq) do {                                      \
 406         IF_LOCK(ifq);                                           \
 407         _IF_DRAIN(ifq);                                         \
 408         IF_UNLOCK(ifq);                                         \
 409 } while(0)
 410
 411 #ifdef _KERNEL
 412 /* interface link layer address change event */
 413 typedef void (*iflladdr_event_handler_t)(void *, struct ifnet *);
 414 EVENTHANDLER_DECLARE(iflladdr_event, iflladdr_event_handler_t);
 415 /* interface address change event */
 416 typedef void (*ifaddr_event_handler_t)(void *, struct ifnet *);
 417 EVENTHANDLER_DECLARE(ifaddr_event, ifaddr_event_handler_t);
 418 /* new interface arrival event */
 419 typedef void (*ifnet_arrival_event_handler_t)(void *, struct ifnet *);
 420 EVENTHANDLER_DECLARE(ifnet_arrival_event, ifnet_arrival_event_handler_t);
 421 /* interface departure event */
 422 typedef void (*ifnet_departure_event_handler_t)(void *, struct ifnet *);
 423 EVENTHANDLER_DECLARE(ifnet_departure_event, ifnet_departure_event_handler_t);
 424 /* Interface link state change event */
 425 typedef void (*ifnet_link_event_handler_t)(void *, struct ifnet *, int);
 426 EVENTHANDLER_DECLARE(ifnet_link_event, ifnet_link_event_handler_t);
 427
 428 /*
 429  * interface groups
 430  */
 431 struct ifg_group {
 432         char                             ifg_group[IFNAMSIZ];
 433         u_int                            ifg_refcnt;
 434         void                            *ifg_pf_kif;
 435         TAILQ_HEAD(, ifg_member)         ifg_members;
 436         TAILQ_ENTRY(ifg_group)           ifg_next;
 437 };
 438
 439 struct ifg_member {
 440         TAILQ_ENTRY(ifg_member)  ifgm_next;
 441         struct ifnet            *ifgm_ifp;
 442 };
 443
 444 struct ifg_list {
 445         struct ifg_group        *ifgl_group;
 446         TAILQ_ENTRY(ifg_list)    ifgl_next;
 447 };
 448
 449 /* group attach event */
 450 typedef void (*group_attach_event_handler_t)(void *, struct ifg_group *);
 451 EVENTHANDLER_DECLARE(group_attach_event, group_attach_event_handler_t);
 452 /* group detach event */
 453 typedef void (*group_detach_event_handler_t)(void *, struct ifg_group *);
 454 EVENTHANDLER_DECLARE(group_detach_event, group_detach_event_handler_t);
 455 /* group change event */
 456 typedef void (*group_change_event_handler_t)(void *, const char *);
 457 EVENTHANDLER_DECLARE(group_change_event, group_change_event_handler_t);
 458
 459 #define IF_AFDATA_LOCK_INIT(ifp)        \
 460         rw_init(&(ifp)->if_afdata_lock, "if_afdata")
 461
 462 #define IF_AFDATA_WLOCK(ifp)    rw_wlock(&(ifp)->if_afdata_lock)
 463 #define IF_AFDATA_RLOCK(ifp)    rw_rlock(&(ifp)->if_afdata_lock)
 464 #define IF_AFDATA_WUNLOCK(ifp)  rw_wunlock(&(ifp)->if_afdata_lock)
 465 #define IF_AFDATA_RUNLOCK(ifp)  rw_runlock(&(ifp)->if_afdata_lock)
 466 #define IF_AFDATA_LOCK(ifp)     IF_AFDATA_WLOCK(ifp)
 467 #define IF_AFDATA_UNLOCK(ifp)   IF_AFDATA_WUNLOCK(ifp)
 468 #define IF_AFDATA_TRYLOCK(ifp)  rw_try_wlock(&(ifp)->if_afdata_lock)
 469 #define IF_AFDATA_DESTROY(ifp)  rw_destroy(&(ifp)->if_afdata_lock)
 470
 471 #define IF_AFDATA_LOCK_ASSERT(ifp)      rw_assert(&(ifp)->if_afdata_lock, RA_LOCKED)
 472 #define IF_AFDATA_RLOCK_ASSERT(ifp)     rw_assert(&(ifp)->if_afdata_lock, RA_RLOCKED)
 473 #define IF_AFDATA_WLOCK_ASSERT(ifp)     rw_assert(&(ifp)->if_afdata_lock, RA_WLOCKED)
 474 #define IF_AFDATA_UNLOCK_ASSERT(ifp)    rw_assert(&(ifp)->if_afdata_lock, RA_UNLOCKED)
 475
 476 int     if_handoff(struct ifqueue *ifq, struct mbuf *m, struct ifnet *ifp,
 477             int adjust);
 478 #define IF_HANDOFF(ifq, m, ifp)                 \
 479         if_handoff((struct ifqueue *)ifq, m, ifp, 0)
 480 #define IF_HANDOFF_ADJ(ifq, m, ifp, adj)        \
 481         if_handoff((struct ifqueue *)ifq, m, ifp, adj)
 482
 483 void    if_start(struct ifnet *);
 484
 485 #define IFQ_ENQUEUE(ifq, m, err)                                        \
 486 do {                                                                    \
 487         IF_LOCK(ifq);                                                   \
 488         if (ALTQ_IS_ENABLED(ifq))                                       \
 489                 ALTQ_ENQUEUE(ifq, m, NULL, err);                        \
 490         else {                                                          \
 491                 if (_IF_QFULL(ifq)) {                                   \
 492                         m_freem(m);                                     \
 493                         (err) = ENOBUFS;                                \
 494                 } else {                                                \
 495                         _IF_ENQUEUE(ifq, m);                            \
 496                         (err) = 0;                                      \
 497                 }                                                       \
 498         }                                                               \
 499         if (err)                                                        \
 500                 (ifq)->ifq_drops++;                                     \
 501         IF_UNLOCK(ifq);                                                 \
 502 } while (0)
 503
 504 #define IFQ_DEQUEUE_NOLOCK(ifq, m)                                      \
 505 do {                                                                    \
 506         if (TBR_IS_ENABLED(ifq))                                        \
 507                 (m) = tbr_dequeue_ptr(ifq, ALTDQ_REMOVE);               \
 508         else if (ALTQ_IS_ENABLED(ifq))                                  \
 509                 ALTQ_DEQUEUE(ifq, m);                                   \
 510         else                                                            \
 511                 _IF_DEQUEUE(ifq, m);                                    \
 512 } while (0)
 513
 514 #define IFQ_DEQUEUE(ifq, m)                                             \
 515 do {                                                                    \
 516         IF_LOCK(ifq);                                                   \
 517         IFQ_DEQUEUE_NOLOCK(ifq, m);                                     \
 518         IF_UNLOCK(ifq);                                                 \
 519 } while (0)
 520
 521 #define IFQ_POLL_NOLOCK(ifq, m)                                         \
 522 do {                                                                    \
 523         if (TBR_IS_ENABLED(ifq))                                        \
 524                 (m) = tbr_dequeue_ptr(ifq, ALTDQ_POLL);                 \
 525         else if (ALTQ_IS_ENABLED(ifq))                                  \
 526                 ALTQ_POLL(ifq, m);                                      \
 527         else                                                            \
 528                 _IF_POLL(ifq, m);                                       \
 529 } while (0)
 530
 531 #define IFQ_POLL(ifq, m)                                                \
 532 do {                                                                    \
 533         IF_LOCK(ifq);                                                   \
 534         IFQ_POLL_NOLOCK(ifq, m);                                        \
 535         IF_UNLOCK(ifq);                                                 \
 536 } while (0)
 537
 538 #define IFQ_PURGE_NOLOCK(ifq)                                           \
 539 do {                                                                    \
 540         if (ALTQ_IS_ENABLED(ifq)) {                                     \
 541                 ALTQ_PURGE(ifq);                                        \
 542         } else                                                          \
 543                 _IF_DRAIN(ifq);                                         \
 544 } while (0)
 545
 546 #define IFQ_PURGE(ifq)                                                  \
 547 do {                                                                    \
 548         IF_LOCK(ifq);                                                   \
 549         IFQ_PURGE_NOLOCK(ifq);                                          \
 550         IF_UNLOCK(ifq);                                                 \
 551 } while (0)
 552
 553 #define IFQ_SET_READY(ifq)                                              \
 554         do { ((ifq)->altq_flags |= ALTQF_READY); } while (0)
 555
 556 #define IFQ_LOCK(ifq)                   IF_LOCK(ifq)
 557 #define IFQ_UNLOCK(ifq)                 IF_UNLOCK(ifq)
 558 #define IFQ_LOCK_ASSERT(ifq)            IF_LOCK_ASSERT(ifq)
 559 #define IFQ_IS_EMPTY(ifq)               ((ifq)->ifq_len == 0)
 560 #define IFQ_INC_LEN(ifq)                ((ifq)->ifq_len++)
 561 #define IFQ_DEC_LEN(ifq)                (--(ifq)->ifq_len)
 562 #define IFQ_INC_DROPS(ifq)              ((ifq)->ifq_drops++)
 563 #define IFQ_SET_MAXLEN(ifq, len)        ((ifq)->ifq_maxlen = (len))
 564
 565 /*
 566  * The IFF_DRV_OACTIVE test should really occur in the device driver, not in
 567  * the handoff logic, as that flag is locked by the device driver.
 568  */
 569 #define IFQ_HANDOFF_ADJ(ifp, m, adj, err)                               \
 570 do {                                                                    \
 571         int len;                                                        \
 572         short mflags;                                                   \
 573                                                                         \
 574         len = (m)->m_pkthdr.len;                                        \
 575         mflags = (m)->m_flags;                                          \
 576         IFQ_ENQUEUE(&(ifp)->if_snd, m, err);                            \
 577         if ((err) == 0) {                                               \
 578                 (ifp)->if_obytes += len + (adj);                        \
 579                 if (mflags & M_MCAST)                                   \
 580                         (ifp)->if_omcasts++;                            \
 581                 if (((ifp)->if_drv_flags & IFF_DRV_OACTIVE) == 0)       \
 582                         if_start(ifp);                                  \
 583         }                                                               \
 584 } while (0)
 585
 586 #define IFQ_HANDOFF(ifp, m, err)                                        \
 587         IFQ_HANDOFF_ADJ(ifp, m, 0, err)
 588
 589 #define IFQ_DRV_DEQUEUE(ifq, m)                                         \
 590 do {                                                                    \
 591         (m) = (ifq)->ifq_drv_head;                                      \
 592         if (m) {                                                        \
 593                 if (((ifq)->ifq_drv_head = (m)->m_nextpkt) == NULL)     \
 594                         (ifq)->ifq_drv_tail = NULL;                     \
 595                 (m)->m_nextpkt = NULL;                                  \
 596                 (ifq)->ifq_drv_len--;                                   \
 597         } else {                                                        \
 598                 IFQ_LOCK(ifq);                                          \
 599                 IFQ_DEQUEUE_NOLOCK(ifq, m);                             \
 600                 while ((ifq)->ifq_drv_len < (ifq)->ifq_drv_maxlen) {    \
 601                         struct mbuf *m0;                                \
 602                         IFQ_DEQUEUE_NOLOCK(ifq, m0);                    \
 603                         if (m0 == NULL)                                 \
 604                                 break;                                  \
 605                         m0->m_nextpkt = NULL;                           \
 606                         if ((ifq)->ifq_drv_tail == NULL)                \
 607                                 (ifq)->ifq_drv_head = m0;               \
 608                         else                                            \
 609                                 (ifq)->ifq_drv_tail->m_nextpkt = m0;    \
 610                         (ifq)->ifq_drv_tail = m0;                       \
 611                         (ifq)->ifq_drv_len++;                           \
 612                 }                                                       \
 613                 IFQ_UNLOCK(ifq);                                        \
 614         }                                                               \
 615 } while (0)
 616
 617 #define IFQ_DRV_PREPEND(ifq, m)                                         \
 618 do {                                                                    \
 619         (m)->m_nextpkt = (ifq)->ifq_drv_head;                           \
 620         if ((ifq)->ifq_drv_tail == NULL)                                \
 621                 (ifq)->ifq_drv_tail = (m);                              \
 622         (ifq)->ifq_drv_head = (m);                                      \
 623         (ifq)->ifq_drv_len++;                                           \
 624 } while (0)
 625
 626 #define IFQ_DRV_IS_EMPTY(ifq)                                           \
 627         (((ifq)->ifq_drv_len == 0) && ((ifq)->ifq_len == 0))
 628
 629 #define IFQ_DRV_PURGE(ifq)                                              \
 630 do {                                                                    \
 631         struct mbuf *m, *n = (ifq)->ifq_drv_head;                       \
 632         while((m = n) != NULL) {                                        \
 633                 n = m->m_nextpkt;                                       \
 634                 m_freem(m);                                             \
 635         }                                                               \
 636         (ifq)->ifq_drv_head = (ifq)->ifq_drv_tail = NULL;               \
 637         (ifq)->ifq_drv_len = 0;                                         \
 638         IFQ_PURGE(ifq);                                                 \
 639 } while (0)
 640
 641 #ifdef _KERNEL
 642 static __inline void
 643 if_initbaudrate(struct ifnet *ifp, uintmax_t baud)
 644 {
 645
 646         ifp->if_baudrate_pf = 0;
 647         while (baud > (u_long)(~0UL)) {
 648                 baud /= 10;
 649                 ifp->if_baudrate_pf++;
 650         }
 651         ifp->if_baudrate = baud;
 652 }
 653
 654 static __inline int
 655 drbr_enqueue(struct ifnet *ifp, struct buf_ring *br, struct mbuf *m)
 656 {
 657         int error = 0;
 658
 659 #ifdef ALTQ
 660         if (ALTQ_IS_ENABLED(&ifp->if_snd)) {
 661                 IFQ_ENQUEUE(&ifp->if_snd, m, error);
 662                 return (error);
 663         }
 664 #endif
 665         error = buf_ring_enqueue(br, m);
 666         if (error)
 667                 m_freem(m);
 668
 669         return (error);
 670 }
 671
 672 static __inline void
 673 drbr_putback(struct ifnet *ifp, struct buf_ring *br, struct mbuf *new)
 674 {
 675         /*
 676          * The top of the list needs to be swapped
 677          * for this one.
 678          */
 679 #ifdef ALTQ
 680         if (ifp != NULL && ALTQ_IS_ENABLED(&ifp->if_snd)) {
 681                 /*
 682                  * Peek in altq case dequeued it
 683                  * so put it back.
 684                  */
 685                 IFQ_DRV_PREPEND(&ifp->if_snd, new);
 686                 return;
 687         }
 688 #endif
 689         buf_ring_putback_sc(br, new);
 690 }
 691
 692 static __inline struct mbuf *
 693 drbr_peek(struct ifnet *ifp, struct buf_ring *br)
 694 {
 695 #ifdef ALTQ
 696         struct mbuf *m;
 697         if (ifp != NULL && ALTQ_IS_ENABLED(&ifp->if_snd)) {
 698                 /*
 699                  * Pull it off like a dequeue
 700                  * since drbr_advance() does nothing
 701                  * for altq and drbr_putback() will
 702                  * use the old prepend function.
 703                  */
 704                 IFQ_DEQUEUE(&ifp->if_snd, m);
 705                 return (m);
 706         }
 707 #endif
 708         return(buf_ring_peek(br));
 709 }
 710
 711 static __inline void
 712 drbr_flush(struct ifnet *ifp, struct buf_ring *br)
 713 {
 714         struct mbuf *m;
 715
 716 #ifdef ALTQ
 717         if (ifp != NULL && ALTQ_IS_ENABLED(&ifp->if_snd))
 718                 IFQ_PURGE(&ifp->if_snd);
 719 #endif
 720         while ((m = buf_ring_dequeue_sc(br)) != NULL)
 721                 m_freem(m);
 722 }
 723
 724 static __inline void
 725 drbr_free(struct buf_ring *br, struct malloc_type *type)
 726 {
 727
 728         drbr_flush(NULL, br);
 729         buf_ring_free(br, type);
 730 }
 731
 732 static __inline struct mbuf *
 733 drbr_dequeue(struct ifnet *ifp, struct buf_ring *br)
 734 {
 735 #ifdef ALTQ
 736         struct mbuf *m;
 737
 738         if (ifp != NULL && ALTQ_IS_ENABLED(&ifp->if_snd)) {
 739                 IFQ_DEQUEUE(&ifp->if_snd, m);
 740                 return (m);
 741         }
 742 #endif
 743         return (buf_ring_dequeue_sc(br));
 744 }
 745
 746 static __inline void
 747 drbr_advance(struct ifnet *ifp, struct buf_ring *br)
 748 {
 749 #ifdef ALTQ
 750         /* Nothing to do here since peek dequeues in altq case */
 751         if (ifp != NULL && ALTQ_IS_ENABLED(&ifp->if_snd))
 752                 return;
 753 #endif
 754         return (buf_ring_advance_sc(br));
 755 }
 756
 757
 758 static __inline struct mbuf *
 759 drbr_dequeue_cond(struct ifnet *ifp, struct buf_ring *br,
 760     int (*func) (struct mbuf *, void *), void *arg)
 761 {
 762         struct mbuf *m;
 763 #ifdef ALTQ
 764         if (ALTQ_IS_ENABLED(&ifp->if_snd)) {
 765                 IFQ_LOCK(&ifp->if_snd);
 766                 IFQ_POLL_NOLOCK(&ifp->if_snd, m);
 767                 if (m != NULL && func(m, arg) == 0) {
 768                         IFQ_UNLOCK(&ifp->if_snd);
 769                         return (NULL);
 770                 }
 771                 IFQ_DEQUEUE_NOLOCK(&ifp->if_snd, m);
 772                 IFQ_UNLOCK(&ifp->if_snd);
 773                 return (m);
 774         }
 775 #endif
 776         m = buf_ring_peek(br);
 777         if (m == NULL || func(m, arg) == 0)
 778                 return (NULL);
 779
 780         return (buf_ring_dequeue_sc(br));
 781 }
 782
 783 static __inline int
 784 drbr_empty(struct ifnet *ifp, struct buf_ring *br)
 785 {
 786 #ifdef ALTQ
 787         if (ALTQ_IS_ENABLED(&ifp->if_snd))
 788                 return (IFQ_IS_EMPTY(&ifp->if_snd));
 789 #endif
 790         return (buf_ring_empty(br));
 791 }
 792
 793 static __inline int
 794 drbr_needs_enqueue(struct ifnet *ifp, struct buf_ring *br)
 795 {
 796 #ifdef ALTQ
 797         if (ALTQ_IS_ENABLED(&ifp->if_snd))
 798                 return (1);
 799 #endif
 800         return (!buf_ring_empty(br));
 801 }
 802
 803 static __inline int
 804 drbr_inuse(struct ifnet *ifp, struct buf_ring *br)
 805 {
 806 #ifdef ALTQ
 807         if (ALTQ_IS_ENABLED(&ifp->if_snd))
 808                 return (ifp->if_snd.ifq_len);
 809 #endif
 810         return (buf_ring_count(br));
 811 }
 812 #endif
 813 /*
 814  * 72 was chosen below because it is the size of a TCP/IP
 815  * header (40) + the minimum mss (32).
 816  */
 817 #define IF_MINMTU       72
 818 #define IF_MAXMTU       65535
 819
 820 #define TOEDEV(ifp)     ((ifp)->if_llsoftc)
 821
 822 #endif /* _KERNEL */
 823
 824 /*
 825  * The ifaddr structure contains information about one address
 826  * of an interface.  They are maintained by the different address families,
 827  * are allocated and attached when an address is set, and are linked
 828  * together so all addresses for an interface can be located.
 829  *
 830  * NOTE: a 'struct ifaddr' is always at the beginning of a larger
 831  * chunk of malloc'ed memory, where we store the three addresses
 832  * (ifa_addr, ifa_dstaddr and ifa_netmask) referenced here.
 833  */
 834 struct ifaddr {
 835         struct  sockaddr *ifa_addr;     /* address of interface */
 836         struct  sockaddr *ifa_dstaddr;  /* other end of p-to-p link */
 837 #define ifa_broadaddr   ifa_dstaddr     /* broadcast address interface */
 838         struct  sockaddr *ifa_netmask;  /* used to determine subnet */
 839         struct  if_data if_data;        /* not all members are meaningful */
 840         struct  ifnet *ifa_ifp;         /* back-pointer to interface */
 841         struct  carp_softc *ifa_carp;   /* pointer to CARP data */
 842         TAILQ_ENTRY(ifaddr) ifa_link;   /* queue macro glue */
 843         void    (*ifa_rtrequest)        /* check or clean routes (+ or -)'d */
 844                 (int, struct rtentry *, struct rt_addrinfo *);
 845         u_short ifa_flags;              /* mostly rt_flags for cloning */
 846         u_int   ifa_refcnt;             /* references to this structure */
 847         int     ifa_metric;             /* cost of going out this interface */
 848         int (*ifa_claim_addr)           /* check if an addr goes to this if */
 849                 (struct ifaddr *, struct sockaddr *);
 850         struct mtx ifa_mtx;
 851 };
 852 #define IFA_ROUTE       RTF_UP          /* route installed */
 853 #define IFA_RTSELF      RTF_HOST        /* loopback route to self installed */
 854
 855 /* for compatibility with other BSDs */
 856 #define ifa_list        ifa_link
 857
 858 #ifdef _KERNEL
 859 #define IFA_LOCK(ifa)           mtx_lock(&(ifa)->ifa_mtx)
 860 #define IFA_UNLOCK(ifa)         mtx_unlock(&(ifa)->ifa_mtx)
 861
 862 void    ifa_free(struct ifaddr *ifa);
 863 void    ifa_init(struct ifaddr *ifa);
 864 void    ifa_ref(struct ifaddr *ifa);
 865 #endif
 866
 867 /*
 868  * Multicast address structure.  This is analogous to the ifaddr
 869  * structure except that it keeps track of multicast addresses.
 870  */
 871 struct ifmultiaddr {
 872         TAILQ_ENTRY(ifmultiaddr) ifma_link; /* queue macro glue */
 873         struct  sockaddr *ifma_addr;    /* address this membership is for */
 874         struct  sockaddr *ifma_lladdr;  /* link-layer translation, if any */
 875         struct  ifnet *ifma_ifp;        /* back-pointer to interface */
 876         u_int   ifma_refcount;          /* reference count */
 877         void    *ifma_protospec;        /* protocol-specific state, if any */
 878         struct  ifmultiaddr *ifma_llifma; /* pointer to ifma for ifma_lladdr */
 879 };
 880
 881 #ifdef _KERNEL
 882
 883 extern  struct rwlock ifnet_rwlock;
 884 extern  struct sx ifnet_sxlock;
 885
 886 #define IFNET_LOCK_INIT() do {                                          \
 887         rw_init_flags(&ifnet_rwlock, "ifnet_rw",  RW_RECURSE);          \
 888         sx_init_flags(&ifnet_sxlock, "ifnet_sx",  SX_RECURSE);          \
 889 } while(0)
 890
 891 #define IFNET_WLOCK() do {                                              \
 892         sx_xlock(&ifnet_sxlock);                                        \
 893         rw_wlock(&ifnet_rwlock);                                        \
 894 } while (0)
 895
 896 #define IFNET_WUNLOCK() do {                                            \
 897         rw_wunlock(&ifnet_rwlock);                                      \
 898         sx_xunlock(&ifnet_sxlock);                                      \
 899 } while (0)
 900
 901 /*
 902  * To assert the ifnet lock, you must know not only whether it's for read or
 903  * write, but also whether it was acquired with sleep support or not.
 904  */
 905 #define IFNET_RLOCK_ASSERT()            sx_assert(&ifnet_sxlock, SA_SLOCKED)
 906 #define IFNET_RLOCK_NOSLEEP_ASSERT()    rw_assert(&ifnet_rwlock, RA_RLOCKED)
 907 #define IFNET_WLOCK_ASSERT() do {                                       \
 908         sx_assert(&ifnet_sxlock, SA_XLOCKED);                           \
 909         rw_assert(&ifnet_rwlock, RA_WLOCKED);                           \
 910 } while (0)
 911
 912 #define IFNET_RLOCK()           sx_slock(&ifnet_sxlock)
 913 #define IFNET_RLOCK_NOSLEEP()   rw_rlock(&ifnet_rwlock)
 914 #define IFNET_RUNLOCK()         sx_sunlock(&ifnet_sxlock)
 915 #define IFNET_RUNLOCK_NOSLEEP() rw_runlock(&ifnet_rwlock)
 916
 917 /*
 918  * Look up an ifnet given its index; the _ref variant also acquires a
 919  * reference that must be freed using if_rele().  It is almost always a bug
 920  * to call ifnet_byindex() instead if ifnet_byindex_ref().
 921  */
 922 struct ifnet    *ifnet_byindex(u_short idx);
 923 struct ifnet    *ifnet_byindex_locked(u_short idx);
 924 struct ifnet    *ifnet_byindex_ref(u_short idx);
 925
 926 /*
 927  * Given the index, ifaddr_byindex() returns the one and only
 928  * link-level ifaddr for the interface. You are not supposed to use
 929  * it to traverse the list of addresses associated to the interface.
 930  */
 931 struct ifaddr   *ifaddr_byindex(u_short idx);
 932
 933 VNET_DECLARE(struct ifnethead, ifnet);
 934 VNET_DECLARE(struct ifgrouphead, ifg_head);
 935 VNET_DECLARE(int, if_index);
 936 VNET_DECLARE(struct ifnet *, loif);     /* first loopback interface */
 937 VNET_DECLARE(int, useloopback);
 938
 939 #define V_ifnet         VNET(ifnet)
 940 #define V_ifg_head      VNET(ifg_head)
 941 #define V_if_index      VNET(if_index)
 942 #define V_loif          VNET(loif)
 943 #define V_useloopback   VNET(useloopback)
 944
 945 extern  int ifqmaxlen;
 946
 947 int     if_addgroup(struct ifnet *, const char *);
 948 int     if_delgroup(struct ifnet *, const char *);
 949 int     if_addmulti(struct ifnet *, struct sockaddr *, struct ifmultiaddr **);
 950 int     if_allmulti(struct ifnet *, int);
 951 struct  ifnet* if_alloc(u_char);
 952 void    if_attach(struct ifnet *);
 953 void    if_dead(struct ifnet *);
 954 int     if_delmulti(struct ifnet *, struct sockaddr *);
 955 void    if_delmulti_ifma(struct ifmultiaddr *);
 956 void    if_detach(struct ifnet *);
 957 void    if_vmove(struct ifnet *, struct vnet *);
 958 void    if_purgeaddrs(struct ifnet *);
 959 void    if_delallmulti(struct ifnet *);
 960 void    if_down(struct ifnet *);
 961 struct ifmultiaddr *
 962         if_findmulti(struct ifnet *, struct sockaddr *);
 963 void    if_free(struct ifnet *);
 964 void    if_initname(struct ifnet *, const char *, int);
 965 void    if_link_state_change(struct ifnet *, int);
 966 int     if_printf(struct ifnet *, const char *, ...) __printflike(2, 3);
 967 void    if_qflush(struct ifnet *);
 968 void    if_ref(struct ifnet *);
 969 void    if_rele(struct ifnet *);
 970 int     if_setlladdr(struct ifnet *, const u_char *, int);
 971 void    if_up(struct ifnet *);
 972 int     ifioctl(struct socket *, u_long, caddr_t, struct thread *);
 973 int     ifpromisc(struct ifnet *, int);
 974 struct  ifnet *ifunit(const char *);
 975 struct  ifnet *ifunit_ref(const char *);
 976
 977 void    ifq_init(struct ifaltq *, struct ifnet *ifp);
 978 void    ifq_delete(struct ifaltq *);
 979
 980 int     ifa_add_loopback_route(struct ifaddr *, struct sockaddr *);
 981 int     ifa_del_loopback_route(struct ifaddr *, struct sockaddr *);
 982
 983 struct  ifaddr *ifa_ifwithaddr(struct sockaddr *);
 984 int             ifa_ifwithaddr_check(struct sockaddr *);
 985 struct  ifaddr *ifa_ifwithbroadaddr(struct sockaddr *);
 986 struct  ifaddr *ifa_ifwithdstaddr(struct sockaddr *);
 987 struct  ifaddr *ifa_ifwithdstaddr_fib(struct sockaddr *, int);
 988 struct  ifaddr *ifa_ifwithnet(struct sockaddr *, int);
 989 struct  ifaddr *ifa_ifwithnet_fib(struct sockaddr *, int, int);
 990 struct  ifaddr *ifa_ifwithroute(int, struct sockaddr *, struct sockaddr *);
 991 struct  ifaddr *ifa_ifwithroute_fib(int, struct sockaddr *, struct sockaddr *, u_int);
 992 struct  ifaddr *ifaof_ifpforaddr(struct sockaddr *, struct ifnet *);
 993 int     ifa_preferred(struct ifaddr *, struct ifaddr *);
 994
 995 int     if_simloop(struct ifnet *ifp, struct mbuf *m, int af, int hlen);
 996
 997 typedef void *if_com_alloc_t(u_char type, struct ifnet *ifp);
 998 typedef void if_com_free_t(void *com, u_char type);
 999 void    if_register_com_alloc(u_char type, if_com_alloc_t *a, if_com_free_t *f);
1000 void    if_deregister_com_alloc(u_char type);
1001 uint64_t if_get_counter_default(struct ifnet *, ift_counter);
1002 void    if_inc_counter(struct ifnet *, ift_counter, int64_t);
1003
1004 #define IF_LLADDR(ifp)                                                  \
1005     LLADDR((struct sockaddr_dl *)((ifp)->if_addr->ifa_addr))
1006
1007 #ifdef DEVICE_POLLING
1008 enum poll_cmd { POLL_ONLY, POLL_AND_CHECK_STATUS };
1009
1010 typedef int poll_handler_t(struct ifnet *ifp, enum poll_cmd cmd, int count);
1011 int    ether_poll_register(poll_handler_t *h, struct ifnet *ifp);
1012 int    ether_poll_deregister(struct ifnet *ifp);
1013 #endif /* DEVICE_POLLING */
1014
1015 /* TSO */
1016 void if_hw_tsomax_common(struct ifnet *, struct ifnet_hw_tsomax *);
1017 int if_hw_tsomax_update(struct ifnet *, struct ifnet_hw_tsomax *);
1018
1019 #endif /* _KERNEL */
1020
1021 #endif /* !_NET_IF_VAR_H_ */