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  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by the University of
  16  *      California, Berkeley and its contributors.
  17  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  *
  33  *      @(#)if.h        8.1 (Berkeley) 6/10/93
  34  * $FreeBSD: src/sys/net/if.h,v 1.58.2.9 2002/08/30 14:23:38 sobomax Exp $
  35  * $DragonFly: src/sys/net/if.h,v 1.19 2007/09/30 04:37:27 sephe Exp $
  36  */
  37
  38 #ifndef _NET_IF_H_
  39 #define _NET_IF_H_
  40
  41 #ifndef _SYS_TYPES_H_
  42 #include <sys/types.h>
  43 #endif
  44 #ifndef _SYS_TIME_H_
  45 #include <sys/time.h>
  46 #endif
  47 #ifndef _SYS_SOCKET_H_
  48 #include <sys/socket.h>
  49 #endif
  50
  51 #ifdef _KERNEL
  52
  53 #ifndef _SYS_QUEUE_H_
  54 #include <sys/queue.h>
  55 #endif
  56
  57 #endif
  58
  59 /*
  60  * Values for if_link_state.
  61  */
  62 #define LINK_STATE_UNKNOWN      0       /* link invalid/unknown */
  63 #define LINK_STATE_DOWN         1       /* link is down */
  64 #define LINK_STATE_UP           2       /* link is up */
  65
  66 struct ifnet;
  67
  68 /*
  69  * Length of interface external name, including terminating '\0'.
  70  * Note: this is the same size as a generic device's external name.
  71  */
  72 #define         IFNAMSIZ        16
  73 #define         IF_NAMESIZE     IFNAMSIZ
  74 #define         IF_MAXUNIT      0x7fff          /* if_unit is 15bits */
  75
  76 #ifdef _KERNEL
  77 /*
  78  * Structure describing a `cloning' interface.
  79  */
  80 struct if_clone {
  81         LIST_ENTRY(if_clone) ifc_list;  /* on list of cloners */
  82         const char *ifc_name;           /* name of device, e.g. `gif' */
  83         size_t ifc_namelen;             /* length of name */
  84         int ifc_minifs;                 /* minimum number of interfaces */
  85         int ifc_maxunit;                /* maximum unit number */
  86         unsigned char *ifc_units;       /* bitmap to handle units */
  87         int ifc_bmlen;                  /* bitmap length */
  88
  89         int     (*ifc_create)(struct if_clone *, int);
  90         void    (*ifc_destroy)(struct ifnet *);
  91 };
  92
  93 #define IF_CLONE_INITIALIZER(name, create, destroy, minifs, maxunit)    \
  94         { { 0 }, name, sizeof(name) - 1, minifs, maxunit, NULL, 0, create, destroy }
  95 #endif
  96
  97 /*
  98  * Structure used to query names of interface cloners.
  99  */
 100
 101 struct if_clonereq {
 102         int     ifcr_total;             /* total cloners (out) */
 103         int     ifcr_count;             /* room for this many in user buffer */
 104         char    *ifcr_buffer;           /* buffer for cloner names */
 105 };
 106
 107 /*
 108  * Structure describing information about an interface
 109  * which may be of interest to management entities.
 110  */
 111 struct if_data {
 112         /* generic interface information */
 113         u_char  ifi_type;               /* ethernet, tokenring, etc */
 114         u_char  ifi_physical;           /* e.g., AUI, Thinnet, 10base-T, etc */
 115         u_char  ifi_addrlen;            /* media address length */
 116         u_char  ifi_hdrlen;             /* media header length */
 117         u_char  ifi_recvquota;          /* polling quota for receive intrs */
 118         u_char  ifi_xmitquota;          /* polling quota for xmit intrs */
 119         u_long  ifi_mtu;                /* maximum transmission unit */
 120         u_long  ifi_metric;             /* routing metric (external only) */
 121         u_long  ifi_link_state;         /* current link state */
 122         u_long  ifi_baudrate;           /* linespeed */
 123         /* volatile statistics */
 124         u_long  ifi_ipackets;           /* packets received on interface */
 125         u_long  ifi_ierrors;            /* input errors on interface */
 126         u_long  ifi_opackets;           /* packets sent on interface */
 127         u_long  ifi_oerrors;            /* output errors on interface */
 128         u_long  ifi_collisions;         /* collisions on csma interfaces */
 129         u_long  ifi_ibytes;             /* total number of octets received */
 130         u_long  ifi_obytes;             /* total number of octets sent */
 131         u_long  ifi_imcasts;            /* packets received via multicast */
 132         u_long  ifi_omcasts;            /* packets sent via multicast */
 133         u_long  ifi_iqdrops;            /* dropped on input, this interface */
 134         u_long  ifi_noproto;            /* destined for unsupported protocol */
 135         u_long  ifi_hwassist;           /* HW offload capabilities */
 136         u_long  ifi_unused;             /* XXX was ifi_xmittiming */
 137         struct  timeval ifi_lastchange; /* time of last administrative change */
 138 };
 139
 140 #define IFF_UP          0x1             /* interface is up */
 141 #define IFF_BROADCAST   0x2             /* broadcast address valid */
 142 #define IFF_DEBUG       0x4             /* turn on debugging */
 143 #define IFF_LOOPBACK    0x8             /* is a loopback net */
 144 #define IFF_POINTOPOINT 0x10            /* interface is point-to-point link */
 145 #define IFF_SMART       0x20            /* interface manages own routes */
 146 #define IFF_RUNNING     0x40            /* resources allocated */
 147 #define IFF_NOARP       0x80            /* no address resolution protocol */
 148 #define IFF_PROMISC     0x100           /* receive all packets */
 149 #define IFF_ALLMULTI    0x200           /* receive all multicast packets */
 150 #define IFF_OACTIVE     0x400           /* transmission in progress */
 151 #define IFF_SIMPLEX     0x800           /* 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          /* supports multicast */
 157 #define IFF_POLLING     0x10000         /* Interface is in polling mode. */
 158 #define IFF_PPROMISC    0x20000         /* user-requested promisc mode */
 159 #define IFF_MONITOR     0x40000         /* user-requested monitor mode */
 160
 161 /* flags set internally only: */
 162 #define IFF_CANTCHANGE \
 163         (IFF_BROADCAST|IFF_POINTOPOINT|IFF_RUNNING|IFF_OACTIVE|\
 164             IFF_SIMPLEX|IFF_MULTICAST|IFF_ALLMULTI|IFF_SMART|IFF_POLLING)
 165
 166 /*
 167  * Some convenience macros used for setting ifi_baudrate.
 168  * XXX 1000 vs. 1024? --thorpej@netbsd.org
 169  */
 170 #define IF_Kbps(x)      ((x) * 1000)            /* kilobits/sec. */
 171 #define IF_Mbps(x)      (IF_Kbps((x) * 1000))   /* megabits/sec. */
 172 #define IF_Gbps(x)      (IF_Mbps((x) * 1000))   /* gigabits/sec. */
 173
 174 /* Capabilities that interfaces can advertise. */
 175 #define IFCAP_RXCSUM            0x0001  /* can offload checksum on RX */
 176 #define IFCAP_TXCSUM            0x0002  /* can offload checksum on TX */
 177 #define IFCAP_NETCONS           0x0004  /* can be a network console */
 178 #define IFCAP_VLAN_MTU          0x0008  /* VLAN-compatible MTU */
 179 #define IFCAP_VLAN_HWTAGGING    0x0010  /* hardware VLAN tag support */
 180 #define IFCAP_JUMBO_MTU         0x0020  /* 9000 byte MTU support */
 181
 182 #define IFCAP_HWCSUM            (IFCAP_RXCSUM | IFCAP_TXCSUM)
 183
 184 #define IFQ_MAXLEN      50
 185 #define IFNET_SLOWHZ    1               /* granularity is 1 second */
 186
 187 /*
 188  * Message format for use in obtaining information about interfaces
 189  * from getkerninfo and the routing socket
 190  */
 191 struct if_msghdr {
 192         u_short ifm_msglen;     /* to skip over non-understood messages */
 193         u_char  ifm_version;    /* future binary compatibility */
 194         u_char  ifm_type;       /* message type */
 195         int     ifm_addrs;      /* like rtm_addrs */
 196         int     ifm_flags;      /* value of if_flags */
 197         u_short ifm_index;      /* index for associated ifp */
 198         struct  if_data ifm_data;/* statistics and other data about if */
 199 };
 200
 201 /*
 202  * Message format for use in obtaining information about interface addresses
 203  * from getkerninfo and the routing socket
 204  */
 205 struct ifa_msghdr {
 206         u_short ifam_msglen;    /* to skip over non-understood messages */
 207         u_char  ifam_version;   /* future binary compatibility */
 208         u_char  ifam_type;      /* message type */
 209         int     ifam_addrs;     /* like rtm_addrs */
 210         int     ifam_flags;     /* value of ifa_flags */
 211         u_short ifam_index;     /* index for associated ifp */
 212         int     ifam_metric;    /* value of ifa_metric */
 213 };
 214
 215 /*
 216  * Message format for use in obtaining information about multicast addresses
 217  * from the routing socket
 218  */
 219 struct ifma_msghdr {
 220         u_short ifmam_msglen;   /* to skip over non-understood messages */
 221         u_char  ifmam_version;  /* future binary compatibility */
 222         u_char  ifmam_type;     /* message type */
 223         int     ifmam_addrs;    /* like rtm_addrs */
 224         int     ifmam_flags;    /* value of ifa_flags */
 225         u_short ifmam_index;    /* index for associated ifp */
 226 };
 227
 228 /*
 229  * Message format announcing the arrival or departure of a network interface.
 230  */
 231 struct if_announcemsghdr {
 232         u_short ifan_msglen;    /* to skip over non-understood messages */
 233         u_char  ifan_version;   /* future binary compatibility */
 234         u_char  ifan_type;      /* message type */
 235         u_short ifan_index;     /* index for associated ifp */
 236         char    ifan_name[IFNAMSIZ]; /* if name, e.g. "en0" */
 237         u_short ifan_what;      /* what type of announcement */
 238 };
 239
 240 #define IFAN_ARRIVAL    0       /* interface arrival */
 241 #define IFAN_DEPARTURE  1       /* interface departure */
 242
 243 /*
 244  * Interface request structure used for socket
 245  * ioctl's.  All interface ioctl's must have parameter
 246  * definitions which begin with ifr_name.  The
 247  * remainder may be interface specific.
 248  */
 249 struct  ifreq {
 250         char    ifr_name[IFNAMSIZ];             /* if name, e.g. "en0" */
 251         union {
 252                 struct  sockaddr ifru_addr;
 253                 struct  sockaddr ifru_dstaddr;
 254                 struct  sockaddr ifru_broadaddr;
 255                 short   ifru_flags[2];
 256                 int     ifru_metric;
 257                 int     ifru_mtu;
 258                 int     ifru_phys;
 259                 int     ifru_media;
 260                 void   *ifru_data;
 261                 int     ifru_cap[2];
 262                 int     ifru_pollcpu;
 263         } ifr_ifru;
 264 #define ifr_addr        ifr_ifru.ifru_addr      /* address */
 265 #define ifr_dstaddr     ifr_ifru.ifru_dstaddr   /* other end of p-to-p link */
 266 #define ifr_broadaddr   ifr_ifru.ifru_broadaddr /* broadcast address */
 267 #define ifr_flags       ifr_ifru.ifru_flags[0]  /* flags (low 16 bits) */
 268 #define ifr_flagshigh   ifr_ifru.ifru_flags[1]  /* flags (high 16 bits) */
 269 #define ifr_metric      ifr_ifru.ifru_metric    /* metric */
 270 #define ifr_mtu         ifr_ifru.ifru_mtu       /* mtu */
 271 #define ifr_phys        ifr_ifru.ifru_phys      /* physical wire */
 272 #define ifr_media       ifr_ifru.ifru_media     /* physical media */
 273 #define ifr_data        ifr_ifru.ifru_data      /* for use by interface */
 274 #define ifr_reqcap      ifr_ifru.ifru_cap[0]    /* requested capabilities */
 275 #define ifr_curcap      ifr_ifru.ifru_cap[1]    /* current capabilities */
 276 #define ifr_pollcpu     ifr_ifru.ifru_pollcpu   /* polling(4) cpu */
 277 };
 278
 279 #define _SIZEOF_ADDR_IFREQ(ifr) \
 280         ((ifr).ifr_addr.sa_len > sizeof(struct sockaddr) ? \
 281          (sizeof(struct ifreq) - sizeof(struct sockaddr) + \
 282           (ifr).ifr_addr.sa_len) : sizeof(struct ifreq))
 283
 284 struct ifaliasreq {
 285         char    ifra_name[IFNAMSIZ];            /* if name, e.g. "en0" */
 286         struct  sockaddr ifra_addr;
 287         struct  sockaddr ifra_broadaddr;
 288         struct  sockaddr ifra_mask;
 289 };
 290
 291 struct ifmediareq {
 292         char    ifm_name[IFNAMSIZ];     /* if name, e.g. "en0" */
 293         int     ifm_current;            /* current media options */
 294         int     ifm_mask;               /* don't care mask */
 295         int     ifm_status;             /* media status */
 296         int     ifm_active;             /* active options */
 297         int     ifm_count;              /* # entries in ifm_ulist array */
 298         int     *ifm_ulist;             /* media words */
 299 };
 300
 301 struct  ifdrv {
 302         char            ifd_name[IFNAMSIZ];     /* if name, e.g. "en0" */
 303         unsigned long   ifd_cmd;
 304         size_t          ifd_len;
 305         void            *ifd_data;
 306 };
 307
 308 /*
 309  * Structure used to retrieve aux status data from interfaces.
 310  * Kernel suppliers to this interface should respect the formatting
 311  * needed by ifconfig(8): each line starts with a TAB and ends with
 312  * a newline.  The canonical example to copy and paste is in if_tun.c.
 313  */
 314
 315 #define IFSTATMAX       800             /* 10 lines of text */
 316 struct ifstat {
 317         char    ifs_name[IFNAMSIZ];     /* if name, e.g. "en0" */
 318         char    ascii[IFSTATMAX + 1];
 319 };
 320
 321 /*
 322  * Structure used in SIOCGIFCONF request.
 323  * Used to retrieve interface configuration
 324  * for machine (useful for programs which
 325  * must know all networks accessible).
 326  */
 327 struct  ifconf {
 328         int     ifc_len;                /* size of associated buffer */
 329         union {
 330                 caddr_t ifcu_buf;
 331                 struct  ifreq *ifcu_req;
 332         } ifc_ifcu;
 333 #define ifc_buf ifc_ifcu.ifcu_buf       /* buffer address */
 334 #define ifc_req ifc_ifcu.ifcu_req       /* array of structures returned */
 335 };
 336
 337
 338 /*
 339  * Structure for SIOC[AGD]LIFADDR
 340  */
 341 struct if_laddrreq {
 342         char    iflr_name[IFNAMSIZ];
 343         u_int   flags;
 344 #define IFLR_PREFIX     0x8000  /* in: prefix given  out: kernel fills id */
 345         u_int   prefixlen;         /* in/out */
 346         struct  sockaddr_storage addr;   /* in/out */
 347         struct  sockaddr_storage dstaddr; /* out */
 348 };
 349
 350 #ifndef _KERNEL
 351 struct if_nameindex {
 352         u_int   if_index;       /* 1, 2, ... */
 353         const char *if_name;    /* null terminated name: "le0", ... */
 354 };
 355
 356 __BEGIN_DECLS
 357 u_int    if_nametoindex (const char *);
 358 char    *if_indextoname(u_int, char *);
 359 struct   if_nameindex *if_nameindex (void);
 360 void     if_freenameindex (struct if_nameindex *);
 361 __END_DECLS
 362 #endif
 363
 364 #ifdef _KERNEL
 365 struct thread;
 366 struct ucred;
 367
 368 int     prison_if (struct ucred *cred, struct sockaddr *sa);
 369
 370 /* XXX - this should go away soon. */
 371 #include <net/if_var.h>
 372 #endif
 373
 374 #endif /* !_NET_IF_H_ */