sys/net/if.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  *      @(#)if.h        8.1 (Berkeley) 6/10/93
  30  * $FreeBSD$
  31  */
  32
  33 #ifndef _NET_IF_H_
  34 #define _NET_IF_H_
  35
  36 #include <sys/cdefs.h>
  37
  38 #if __BSD_VISIBLE
  39 /*
  40  * <net/if.h> does not depend on <sys/time.h> on most other systems.  This
  41  * helps userland compatibility.  (struct timeval ifi_lastchange)
  42  * The same holds for <sys/socket.h>.  (struct sockaddr ifru_addr)
  43  */
  44 #ifndef _KERNEL
  45 #include <sys/time.h>
  46 #include <sys/socket.h>
  47 #endif
  48 #endif
  49
  50 /*
  51  * Length of interface external name, including terminating '\0'.
  52  * Note: this is the same size as a generic device's external name.
  53  */
  54 #define         IF_NAMESIZE     16
  55 #if __BSD_VISIBLE
  56 #define         IFNAMSIZ        IF_NAMESIZE
  57 #define         IF_MAXUNIT      0x7fff  /* historical value */
  58 #endif
  59 #if __BSD_VISIBLE
  60
  61 /*
  62  * Structure used to query names of interface cloners.
  63  */
  64
  65 struct if_clonereq {
  66         int     ifcr_total;             /* total cloners (out) */
  67         int     ifcr_count;             /* room for this many in user buffer */
  68         char    *ifcr_buffer;           /* buffer for cloner names */
  69 };
  70
  71 /*
  72  * Structure describing information about an interface
  73  * which may be of interest to management entities.
  74  */
  75 struct if_data {
  76         /* generic interface information */
  77         uint8_t ifi_type;               /* ethernet, tokenring, etc */
  78         uint8_t ifi_physical;           /* e.g., AUI, Thinnet, 10base-T, etc */
  79         uint8_t ifi_addrlen;            /* media address length */
  80         uint8_t ifi_hdrlen;             /* media header length */
  81         uint8_t ifi_link_state;         /* current link state */
  82         uint8_t ifi_vhid;               /* carp vhid */
  83         uint16_t        ifi_datalen;    /* length of this data struct */
  84         uint32_t        ifi_mtu;        /* maximum transmission unit */
  85         uint32_t        ifi_metric;     /* routing metric (external only) */
  86         uint64_t        ifi_baudrate;   /* linespeed */
  87         /* volatile statistics */
  88         uint64_t        ifi_ipackets;   /* packets received on interface */
  89         uint64_t        ifi_ierrors;    /* input errors on interface */
  90         uint64_t        ifi_opackets;   /* packets sent on interface */
  91         uint64_t        ifi_oerrors;    /* output errors on interface */
  92         uint64_t        ifi_collisions; /* collisions on csma interfaces */
  93         uint64_t        ifi_ibytes;     /* total number of octets received */
  94         uint64_t        ifi_obytes;     /* total number of octets sent */
  95         uint64_t        ifi_imcasts;    /* packets received via multicast */
  96         uint64_t        ifi_omcasts;    /* packets sent via multicast */
  97         uint64_t        ifi_iqdrops;    /* dropped on input */
  98         uint64_t        ifi_oqdrops;    /* dropped on output */
  99         uint64_t        ifi_noproto;    /* destined for unsupported protocol */
 100         uint64_t        ifi_hwassist;   /* HW offload capabilities, see IFCAP */
 101
 102         /* Unions are here to make sizes MI. */
 103         union {                         /* uptime at attach or stat reset */
 104                 time_t          tt;
 105                 uint64_t        ph;
 106         } __ifi_epoch;
 107 #define ifi_epoch       __ifi_epoch.tt
 108         union {                         /* time of last administrative change */
 109                 struct timeval  tv;
 110                 struct {
 111                         uint64_t ph1;
 112                         uint64_t ph2;
 113                 } ph;
 114         } __ifi_lastchange;
 115 #define ifi_lastchange  __ifi_lastchange.tv
 116 };
 117
 118 /*-
 119  * Interface flags are of two types: network stack owned flags, and driver
 120  * owned flags.  Historically, these values were stored in the same ifnet
 121  * flags field, but with the advent of fine-grained locking, they have been
 122  * broken out such that the network stack is responsible for synchronizing
 123  * the stack-owned fields, and the device driver the device-owned fields.
 124  * Both halves can perform lockless reads of the other half's field, subject
 125  * to accepting the involved races.
 126  *
 127  * Both sets of flags come from the same number space, and should not be
 128  * permitted to conflict, as they are exposed to user space via a single
 129  * field.
 130  *
 131  * The following symbols identify read and write requirements for fields:
 132  *
 133  * (i) if_flags field set by device driver before attach, read-only there
 134  *     after.
 135  * (n) if_flags field written only by the network stack, read by either the
 136  *     stack or driver.
 137  * (d) if_drv_flags field written only by the device driver, read by either
 138  *     the stack or driver.
 139  */
 140 #define IFF_UP          0x1             /* (n) interface is up */
 141 #define IFF_BROADCAST   0x2             /* (i) broadcast address valid */
 142 #define IFF_DEBUG       0x4             /* (n) turn on debugging */
 143 #define IFF_LOOPBACK    0x8             /* (i) is a loopback net */
 144 #define IFF_POINTOPOINT 0x10            /* (i) is a point-to-point link */
 145 /*                      0x20               was IFF_SMART */
 146 #define IFF_DRV_RUNNING 0x40            /* (d) resources allocated */
 147 #define IFF_NOARP       0x80            /* (n) no address resolution protocol */
 148 #define IFF_PROMISC     0x100           /* (n) receive all packets */
 149 #define IFF_ALLMULTI    0x200           /* (n) receive all multicast packets */
 150 #define IFF_DRV_OACTIVE 0x400           /* (d) tx hardware queue is full */
 151 #define IFF_SIMPLEX     0x800           /* (i) can't hear own transmissions */
 152 #define IFF_LINK0       0x1000          /* per link layer defined bit */
 153 #define IFF_LINK1       0x2000          /* per link layer defined bit */
 154 #define IFF_LINK2       0x4000          /* per link layer defined bit */
 155 #define IFF_ALTPHYS     IFF_LINK2       /* use alternate physical connection */
 156 #define IFF_MULTICAST   0x8000          /* (i) supports multicast */
 157 #define IFF_CANTCONFIG  0x10000         /* (i) unconfigurable using ioctl(2) */
 158 #define IFF_PPROMISC    0x20000         /* (n) user-requested promisc mode */
 159 #define IFF_MONITOR     0x40000         /* (n) user-requested monitor mode */
 160 #define IFF_STATICARP   0x80000         /* (n) static ARP */
 161 #define IFF_DYING       0x200000        /* (n) interface is winding down */
 162 #define IFF_RENAMING    0x400000        /* (n) interface is being renamed */
 163 /*
 164  * Old names for driver flags so that user space tools can continue to use
 165  * the old (portable) names.
 166  */
 167 #ifndef _KERNEL
 168 #define IFF_RUNNING     IFF_DRV_RUNNING
 169 #define IFF_OACTIVE     IFF_DRV_OACTIVE
 170 #endif
 171
 172 /* flags set internally only: */
 173 #define IFF_CANTCHANGE \
 174         (IFF_BROADCAST|IFF_POINTOPOINT|IFF_DRV_RUNNING|IFF_DRV_OACTIVE|\
 175             IFF_SIMPLEX|IFF_MULTICAST|IFF_ALLMULTI|IFF_PROMISC|\
 176             IFF_DYING|IFF_CANTCONFIG)
 177
 178 /*
 179  * Values for if_link_state.
 180  */
 181 #define LINK_STATE_UNKNOWN      0       /* link invalid/unknown */
 182 #define LINK_STATE_DOWN         1       /* link is down */
 183 #define LINK_STATE_UP           2       /* link is up */
 184
 185 /*
 186  * Some convenience macros used for setting ifi_baudrate.
 187  * XXX 1000 vs. 1024? --thorpej@netbsd.org
 188  */
 189 #define IF_Kbps(x)      ((uintmax_t)(x) * 1000) /* kilobits/sec. */
 190 #define IF_Mbps(x)      (IF_Kbps((x) * 1000))   /* megabits/sec. */
 191 #define IF_Gbps(x)      (IF_Mbps((x) * 1000))   /* gigabits/sec. */
 192
 193 /*
 194  * Capabilities that interfaces can advertise.
 195  *
 196  * struct ifnet.if_capabilities
 197  *   contains the optional features & capabilities a particular interface
 198  *   supports (not only the driver but also the detected hw revision).
 199  *   Capabilities are defined by IFCAP_* below.
 200  * struct ifnet.if_capenable
 201  *   contains the enabled (either by default or through ifconfig) optional
 202  *   features & capabilities on this interface.
 203  *   Capabilities are defined by IFCAP_* below.
 204  * struct if_data.ifi_hwassist in mbuf CSUM_ flag form, controlled by above
 205  *   contains the enabled optional feature & capabilites that can be used
 206  *   individually per packet and are specified in the mbuf pkthdr.csum_flags
 207  *   field.  IFCAP_* and CSUM_* do not match one to one and CSUM_* may be
 208  *   more detailed or differenciated than IFCAP_*.
 209  *   Hwassist features are defined CSUM_* in sys/mbuf.h
 210  *
 211  * Capabilities that cannot be arbitrarily changed with ifconfig/ioctl
 212  * are listed in IFCAP_CANTCHANGE, similar to IFF_CANTCHANGE.
 213  * This is not strictly necessary because the common code never
 214  * changes capabilities, and it is left to the individual driver
 215  * to do the right thing. However, having the filter here
 216  * avoids replication of the same code in all individual drivers.
 217  */
 218 #define IFCAP_RXCSUM            0x00001  /* can offload checksum on RX */
 219 #define IFCAP_TXCSUM            0x00002  /* can offload checksum on TX */
 220 #define IFCAP_NETCONS           0x00004  /* can be a network console */
 221 #define IFCAP_VLAN_MTU          0x00008 /* VLAN-compatible MTU */
 222 #define IFCAP_VLAN_HWTAGGING    0x00010 /* hardware VLAN tag support */
 223 #define IFCAP_JUMBO_MTU         0x00020 /* 9000 byte MTU supported */
 224 #define IFCAP_POLLING           0x00040 /* driver supports polling */
 225 #define IFCAP_VLAN_HWCSUM       0x00080 /* can do IFCAP_HWCSUM on VLANs */
 226 #define IFCAP_TSO4              0x00100 /* can do TCP Segmentation Offload */
 227 #define IFCAP_TSO6              0x00200 /* can do TCP6 Segmentation Offload */
 228 #define IFCAP_LRO               0x00400 /* can do Large Receive Offload */
 229 #define IFCAP_WOL_UCAST         0x00800 /* wake on any unicast frame */
 230 #define IFCAP_WOL_MCAST         0x01000 /* wake on any multicast frame */
 231 #define IFCAP_WOL_MAGIC         0x02000 /* wake on any Magic Packet */
 232 #define IFCAP_TOE4              0x04000 /* interface can offload TCP */
 233 #define IFCAP_TOE6              0x08000 /* interface can offload TCP6 */
 234 #define IFCAP_VLAN_HWFILTER     0x10000 /* interface hw can filter vlan tag */
 235 #define IFCAP_POLLING_NOCOUNT   0x20000 /* polling ticks cannot be fragmented */
 236 #define IFCAP_VLAN_HWTSO        0x40000 /* can do IFCAP_TSO on VLANs */
 237 #define IFCAP_LINKSTATE         0x80000 /* the runtime link state is dynamic */
 238 #define IFCAP_NETMAP            0x100000 /* netmap mode supported/enabled */
 239 #define IFCAP_RXCSUM_IPV6       0x200000  /* can offload checksum on IPv6 RX */
 240 #define IFCAP_TXCSUM_IPV6       0x400000  /* can offload checksum on IPv6 TX */
 241 #define IFCAP_HWSTATS           0x800000 /* manages counters internally */
 242
 243 #define IFCAP_HWCSUM_IPV6       (IFCAP_RXCSUM_IPV6 | IFCAP_TXCSUM_IPV6)
 244
 245 #define IFCAP_HWCSUM    (IFCAP_RXCSUM | IFCAP_TXCSUM)
 246 #define IFCAP_TSO       (IFCAP_TSO4 | IFCAP_TSO6)
 247 #define IFCAP_WOL       (IFCAP_WOL_UCAST | IFCAP_WOL_MCAST | IFCAP_WOL_MAGIC)
 248 #define IFCAP_TOE       (IFCAP_TOE4 | IFCAP_TOE6)
 249
 250 #define IFCAP_CANTCHANGE        (IFCAP_NETMAP)
 251
 252 #define IFQ_MAXLEN      50
 253 #define IFNET_SLOWHZ    1               /* granularity is 1 second */
 254
 255 /*
 256  * Message format for use in obtaining information about interfaces
 257  * from getkerninfo and the routing socket
 258  * For the new, extensible interface see struct if_msghdrl below.
 259  */
 260 struct if_msghdr {
 261         u_short ifm_msglen;     /* to skip over non-understood messages */
 262         u_char  ifm_version;    /* future binary compatibility */
 263         u_char  ifm_type;       /* message type */
 264         int     ifm_addrs;      /* like rtm_addrs */
 265         int     ifm_flags;      /* value of if_flags */
 266         u_short ifm_index;      /* index for associated ifp */
 267         struct  if_data ifm_data;/* statistics and other data about if */
 268 };
 269
 270 /*
 271  * The 'l' version shall be used by new interfaces, like NET_RT_IFLISTL.  It is
 272  * extensible after ifm_data_off or within ifm_data.  Both the if_msghdr and
 273  * if_data now have a member field detailing the struct length in addition to
 274  * the routing message length.  Macros are provided to find the start of
 275  * ifm_data and the start of the socket address strucutres immediately following
 276  * struct if_msghdrl given a pointer to struct if_msghdrl.
 277  */
 278 #define IF_MSGHDRL_IFM_DATA(_l) \
 279     (struct if_data *)((char *)(_l) + (_l)->ifm_data_off)
 280 #define IF_MSGHDRL_RTA(_l) \
 281     (void *)((uintptr_t)(_l) + (_l)->ifm_len)
 282 struct if_msghdrl {
 283         u_short ifm_msglen;     /* to skip over non-understood messages */
 284         u_char  ifm_version;    /* future binary compatibility */
 285         u_char  ifm_type;       /* message type */
 286         int     ifm_addrs;      /* like rtm_addrs */
 287         int     ifm_flags;      /* value of if_flags */
 288         u_short ifm_index;      /* index for associated ifp */
 289         u_short _ifm_spare1;    /* spare space to grow if_index, see if_var.h */
 290         u_short ifm_len;        /* length of if_msghdrl incl. if_data */
 291         u_short ifm_data_off;   /* offset of if_data from beginning */
 292         struct  if_data ifm_data;/* statistics and other data about if */
 293 };
 294
 295 /*
 296  * Message format for use in obtaining information about interface addresses
 297  * from getkerninfo and the routing socket
 298  * For the new, extensible interface see struct ifa_msghdrl below.
 299  */
 300 struct ifa_msghdr {
 301         u_short ifam_msglen;    /* to skip over non-understood messages */
 302         u_char  ifam_version;   /* future binary compatibility */
 303         u_char  ifam_type;      /* message type */
 304         int     ifam_addrs;     /* like rtm_addrs */
 305         int     ifam_flags;     /* value of ifa_flags */
 306         u_short ifam_index;     /* index for associated ifp */
 307         int     ifam_metric;    /* value of ifa_ifp->if_metric */
 308 };
 309
 310 /*
 311  * The 'l' version shall be used by new interfaces, like NET_RT_IFLISTL.  It is
 312  * extensible after ifam_metric or within ifam_data.  Both the ifa_msghdrl and
 313  * if_data now have a member field detailing the struct length in addition to
 314  * the routing message length.  Macros are provided to find the start of
 315  * ifm_data and the start of the socket address strucutres immediately following
 316  * struct ifa_msghdrl given a pointer to struct ifa_msghdrl.
 317  */
 318 #define IFA_MSGHDRL_IFAM_DATA(_l) \
 319     (struct if_data *)((char *)(_l) + (_l)->ifam_data_off)
 320 #define IFA_MSGHDRL_RTA(_l) \
 321     (void *)((uintptr_t)(_l) + (_l)->ifam_len)
 322 struct ifa_msghdrl {
 323         u_short ifam_msglen;    /* to skip over non-understood messages */
 324         u_char  ifam_version;   /* future binary compatibility */
 325         u_char  ifam_type;      /* message type */
 326         int     ifam_addrs;     /* like rtm_addrs */
 327         int     ifam_flags;     /* value of ifa_flags */
 328         u_short ifam_index;     /* index for associated ifp */
 329         u_short _ifam_spare1;   /* spare space to grow if_index, see if_var.h */
 330         u_short ifam_len;       /* length of ifa_msghdrl incl. if_data */
 331         u_short ifam_data_off;  /* offset of if_data from beginning */
 332         int     ifam_metric;    /* value of ifa_ifp->if_metric */
 333         struct  if_data ifam_data;/* statistics and other data about if or
 334                                  * address */
 335 };
 336
 337 /*
 338  * Message format for use in obtaining information about multicast addresses
 339  * from the routing socket
 340  */
 341 struct ifma_msghdr {
 342         u_short ifmam_msglen;   /* to skip over non-understood messages */
 343         u_char  ifmam_version;  /* future binary compatibility */
 344         u_char  ifmam_type;     /* message type */
 345         int     ifmam_addrs;    /* like rtm_addrs */
 346         int     ifmam_flags;    /* value of ifa_flags */
 347         u_short ifmam_index;    /* index for associated ifp */
 348 };
 349
 350 /*
 351  * Message format announcing the arrival or departure of a network interface.
 352  */
 353 struct if_announcemsghdr {
 354         u_short ifan_msglen;    /* to skip over non-understood messages */
 355         u_char  ifan_version;   /* future binary compatibility */
 356         u_char  ifan_type;      /* message type */
 357         u_short ifan_index;     /* index for associated ifp */
 358         char    ifan_name[IFNAMSIZ]; /* if name, e.g. "en0" */
 359         u_short ifan_what;      /* what type of announcement */
 360 };
 361
 362 #define IFAN_ARRIVAL    0       /* interface arrival */
 363 #define IFAN_DEPARTURE  1       /* interface departure */
 364
 365 /*
 366  * Buffer with length to be used in SIOCGIFDESCR/SIOCSIFDESCR requests
 367  */
 368 struct ifreq_buffer {
 369         size_t  length;
 370         void    *buffer;
 371 };
 372
 373 /*
 374  * Interface request structure used for socket
 375  * ioctl's.  All interface ioctl's must have parameter
 376  * definitions which begin with ifr_name.  The
 377  * remainder may be interface specific.
 378  */
 379 struct  ifreq {
 380         char    ifr_name[IFNAMSIZ];             /* if name, e.g. "en0" */
 381         union {
 382                 struct  sockaddr ifru_addr;
 383                 struct  sockaddr ifru_dstaddr;
 384                 struct  sockaddr ifru_broadaddr;
 385                 struct  ifreq_buffer ifru_buffer;
 386                 short   ifru_flags[2];
 387                 short   ifru_index;
 388                 int     ifru_jid;
 389                 int     ifru_metric;
 390                 int     ifru_mtu;
 391                 int     ifru_phys;
 392                 int     ifru_media;
 393                 caddr_t ifru_data;
 394                 int     ifru_cap[2];
 395                 u_int   ifru_fib;
 396                 u_char  ifru_vlan_pcp;
 397         } ifr_ifru;
 398 #define ifr_addr        ifr_ifru.ifru_addr      /* address */
 399 #define ifr_dstaddr     ifr_ifru.ifru_dstaddr   /* other end of p-to-p link */
 400 #define ifr_broadaddr   ifr_ifru.ifru_broadaddr /* broadcast address */
 401 #define ifr_buffer      ifr_ifru.ifru_buffer    /* user supplied buffer with its length */
 402 #define ifr_flags       ifr_ifru.ifru_flags[0]  /* flags (low 16 bits) */
 403 #define ifr_flagshigh   ifr_ifru.ifru_flags[1]  /* flags (high 16 bits) */
 404 #define ifr_jid         ifr_ifru.ifru_jid       /* jail/vnet */
 405 #define ifr_metric      ifr_ifru.ifru_metric    /* metric */
 406 #define ifr_mtu         ifr_ifru.ifru_mtu       /* mtu */
 407 #define ifr_phys        ifr_ifru.ifru_phys      /* physical wire */
 408 #define ifr_media       ifr_ifru.ifru_media     /* physical media */
 409 #define ifr_data        ifr_ifru.ifru_data      /* for use by interface */
 410 #define ifr_reqcap      ifr_ifru.ifru_cap[0]    /* requested capabilities */
 411 #define ifr_curcap      ifr_ifru.ifru_cap[1]    /* current capabilities */
 412 #define ifr_index       ifr_ifru.ifru_index     /* interface index */
 413 #define ifr_fib         ifr_ifru.ifru_fib       /* interface fib */
 414 #define ifr_vlan_pcp    ifr_ifru.ifru_vlan_pcp  /* VLAN priority */
 415 };
 416
 417 #define _SIZEOF_ADDR_IFREQ(ifr) \
 418         ((ifr).ifr_addr.sa_len > sizeof(struct sockaddr) ? \
 419          (sizeof(struct ifreq) - sizeof(struct sockaddr) + \
 420           (ifr).ifr_addr.sa_len) : sizeof(struct ifreq))
 421
 422 struct ifaliasreq {
 423         char    ifra_name[IFNAMSIZ];            /* if name, e.g. "en0" */
 424         struct  sockaddr ifra_addr;
 425         struct  sockaddr ifra_broadaddr;
 426         struct  sockaddr ifra_mask;
 427         int     ifra_vhid;
 428 };
 429
 430 /* 9.x compat */
 431 struct oifaliasreq {
 432         char    ifra_name[IFNAMSIZ];
 433         struct  sockaddr ifra_addr;
 434         struct  sockaddr ifra_broadaddr;
 435         struct  sockaddr ifra_mask;
 436 };
 437
 438 struct ifmediareq {
 439         char    ifm_name[IFNAMSIZ];     /* if name, e.g. "en0" */
 440         int     ifm_current;            /* current media options */
 441         int     ifm_mask;               /* don't care mask */
 442         int     ifm_status;             /* media status */
 443         int     ifm_active;             /* active options */
 444         int     ifm_count;              /* # entries in ifm_ulist array */
 445         int     *ifm_ulist;             /* media words */
 446 };
 447
 448 struct  ifdrv {
 449         char            ifd_name[IFNAMSIZ];     /* if name, e.g. "en0" */
 450         unsigned long   ifd_cmd;
 451         size_t          ifd_len;
 452         void            *ifd_data;
 453 };
 454
 455 /*
 456  * Structure used to retrieve aux status data from interfaces.
 457  * Kernel suppliers to this interface should respect the formatting
 458  * needed by ifconfig(8): each line starts with a TAB and ends with
 459  * a newline.  The canonical example to copy and paste is in if_tun.c.
 460  */
 461
 462 #define IFSTATMAX       800             /* 10 lines of text */
 463 struct ifstat {
 464         char    ifs_name[IFNAMSIZ];     /* if name, e.g. "en0" */
 465         char    ascii[IFSTATMAX + 1];
 466 };
 467
 468 /*
 469  * Structure used in SIOCGIFCONF request.
 470  * Used to retrieve interface configuration
 471  * for machine (useful for programs which
 472  * must know all networks accessible).
 473  */
 474 struct  ifconf {
 475         int     ifc_len;                /* size of associated buffer */
 476         union {
 477                 caddr_t ifcu_buf;
 478                 struct  ifreq *ifcu_req;
 479         } ifc_ifcu;
 480 #define ifc_buf ifc_ifcu.ifcu_buf       /* buffer address */
 481 #define ifc_req ifc_ifcu.ifcu_req       /* array of structures returned */
 482 };
 483
 484 /*
 485  * interface groups
 486  */
 487
 488 #define IFG_ALL         "all"           /* group contains all interfaces */
 489 /* XXX: will we implement this? */
 490 #define IFG_EGRESS      "egress"        /* if(s) default route(s) point to */
 491
 492 struct ifg_req {
 493         union {
 494                 char                     ifgrqu_group[IFNAMSIZ];
 495                 char                     ifgrqu_member[IFNAMSIZ];
 496         } ifgrq_ifgrqu;
 497 #define ifgrq_group     ifgrq_ifgrqu.ifgrqu_group
 498 #define ifgrq_member    ifgrq_ifgrqu.ifgrqu_member
 499 };
 500
 501 /*
 502  * Used to lookup groups for an interface
 503  */
 504 struct ifgroupreq {
 505         char    ifgr_name[IFNAMSIZ];
 506         u_int   ifgr_len;
 507         union {
 508                 char    ifgru_group[IFNAMSIZ];
 509                 struct  ifg_req *ifgru_groups;
 510         } ifgr_ifgru;
 511 #define ifgr_group      ifgr_ifgru.ifgru_group
 512 #define ifgr_groups     ifgr_ifgru.ifgru_groups
 513 };
 514
 515 /*
 516  * Structure used to request i2c data
 517  * from interface transceivers.
 518  */
 519 struct ifi2creq {
 520         uint8_t dev_addr;       /* i2c address (0xA0, 0xA2) */
 521         uint8_t offset;         /* read offset */
 522         uint8_t len;            /* read length */
 523         uint8_t spare0;
 524         uint32_t spare1;
 525         uint8_t data[8];        /* read buffer */
 526 };
 527
 528 #endif /* __BSD_VISIBLE */
 529
 530 #ifdef _KERNEL
 531 #ifdef MALLOC_DECLARE
 532 MALLOC_DECLARE(M_IFADDR);
 533 MALLOC_DECLARE(M_IFMADDR);
 534 #endif
 535 #endif
 536
 537 #ifndef _KERNEL
 538 struct if_nameindex {
 539         unsigned int    if_index;       /* 1, 2, ... */
 540         char            *if_name;       /* null terminated name: "le0", ... */
 541 };
 542
 543 __BEGIN_DECLS
 544 void                     if_freenameindex(struct if_nameindex *);
 545 char                    *if_indextoname(unsigned int, char *);
 546 struct if_nameindex     *if_nameindex(void);
 547 unsigned int             if_nametoindex(const char *);
 548 __END_DECLS
 549 #endif
 550 #endif /* !_NET_IF_H_ */