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 1.21 2008/08/30 16:07:59 hasso 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 #define LINK_STATE_IS_UP(_s)    ((_s) >= LINK_STATE_UP)
  66
  67 struct ifnet;
  68
  69 /*
  70  * Length of interface external name, including terminating '\0'.
  71  * Note: this is the same size as a generic device's external name.
  72  */
  73 #define         IFNAMSIZ        16
  74 #define         IF_NAMESIZE     IFNAMSIZ
  75 #define         IF_MAXUNIT      0x7fff          /* if_unit is 15bits */
  76
  77 /*
  78  * Structure used to query names of interface cloners.
  79  * XXX should be moved to net/if_clone.h
  80  */
  81 struct if_clonereq {
  82         int     ifcr_total;             /* total cloners (out) */
  83         int     ifcr_count;             /* room for this many in user buffer */
  84         char    *ifcr_buffer;           /* buffer for cloner names */
  85 };
  86
  87 /*
  88  * Structure describing information about an interface
  89  * which may be of interest to management entities.
  90  */
  91 struct if_data {
  92         /* generic interface information */
  93         u_char  ifi_type;               /* ethernet, tokenring, etc */
  94         u_char  ifi_physical;           /* e.g., AUI, Thinnet, 10base-T, etc */
  95         u_char  ifi_addrlen;            /* media address length */
  96         u_char  ifi_hdrlen;             /* media header length */
  97         u_char  ifi_recvquota;          /* polling quota for receive intrs */
  98         u_char  ifi_xmitquota;          /* polling quota for xmit intrs */
  99         u_long  ifi_mtu;                /* maximum transmission unit */
 100         u_long  ifi_metric;             /* routing metric (external only) */
 101         u_long  ifi_link_state;         /* current link state */
 102         u_long  ifi_baudrate;           /* linespeed */
 103         /* volatile statistics */
 104         u_long  ifi_ipackets;           /* packets received on interface */
 105         u_long  ifi_ierrors;            /* input errors on interface */
 106         u_long  ifi_opackets;           /* packets sent on interface */
 107         u_long  ifi_oerrors;            /* output errors on interface */
 108         u_long  ifi_collisions;         /* collisions on csma interfaces */
 109         u_long  ifi_ibytes;             /* total number of octets received */
 110         u_long  ifi_obytes;             /* total number of octets sent */
 111         u_long  ifi_imcasts;            /* packets received via multicast */
 112         u_long  ifi_omcasts;            /* packets sent via multicast */
 113         u_long  ifi_iqdrops;            /* dropped on input, this interface */
 114         u_long  ifi_noproto;            /* destined for unsupported protocol */
 115         u_long  ifi_hwassist;           /* HW offload capabilities */
 116         u_long  ifi_unused;             /* XXX was ifi_xmittiming */
 117         struct  timeval ifi_lastchange; /* time of last administrative change */
 118 };
 119
 120 #define IFF_UP          0x1             /* interface is up */
 121 #define IFF_BROADCAST   0x2             /* broadcast address valid */
 122 #define IFF_DEBUG       0x4             /* turn on debugging */
 123 #define IFF_LOOPBACK    0x8             /* is a loopback net */
 124 #define IFF_POINTOPOINT 0x10            /* interface is point-to-point link */
 125 #define IFF_SMART       0x20            /* interface manages own routes */
 126 #define IFF_RUNNING     0x40            /* resources allocated */
 127 #define IFF_NOARP       0x80            /* no address resolution protocol */
 128 #define IFF_PROMISC     0x100           /* receive all packets */
 129 #define IFF_ALLMULTI    0x200           /* receive all multicast packets */
 130 #define IFF_OACTIVE     0x400           /* transmission in progress */
 131 #define IFF_SIMPLEX     0x800           /* can't hear own transmissions */
 132 #define IFF_LINK0       0x1000          /* per link layer defined bit */
 133 #define IFF_LINK1       0x2000          /* per link layer defined bit */
 134 #define IFF_LINK2       0x4000          /* per link layer defined bit */
 135 #define IFF_ALTPHYS     IFF_LINK2       /* use alternate physical connection */
 136 #define IFF_MULTICAST   0x8000          /* supports multicast */
 137 #define IFF_POLLING     0x10000         /* Interface is in polling mode. */
 138 #define IFF_PPROMISC    0x20000         /* user-requested promisc mode */
 139 #define IFF_MONITOR     0x40000         /* user-requested monitor mode */
 140
 141 /* flags set internally only: */
 142 #define IFF_CANTCHANGE \
 143         (IFF_BROADCAST|IFF_POINTOPOINT|IFF_RUNNING|IFF_OACTIVE|\
 144             IFF_SIMPLEX|IFF_MULTICAST|IFF_ALLMULTI|IFF_SMART|IFF_POLLING)
 145
 146 /*
 147  * Some convenience macros used for setting ifi_baudrate.
 148  * XXX 1000 vs. 1024? --thorpej@netbsd.org
 149  */
 150 #define IF_Kbps(x)      ((x) * 1000)            /* kilobits/sec. */
 151 #define IF_Mbps(x)      (IF_Kbps((x) * 1000))   /* megabits/sec. */
 152 #define IF_Gbps(x)      (IF_Mbps((x) * 1000))   /* gigabits/sec. */
 153
 154 /* Capabilities that interfaces can advertise. */
 155 #define IFCAP_RXCSUM            0x0001  /* can offload checksum on RX */
 156 #define IFCAP_TXCSUM            0x0002  /* can offload checksum on TX */
 157 #define IFCAP_NETCONS           0x0004  /* can be a network console */
 158 #define IFCAP_VLAN_MTU          0x0008  /* VLAN-compatible MTU */
 159 #define IFCAP_VLAN_HWTAGGING    0x0010  /* hardware VLAN tag support */
 160 #define IFCAP_JUMBO_MTU         0x0020  /* 9000 byte MTU support */
 161
 162 #define IFCAP_HWCSUM            (IFCAP_RXCSUM | IFCAP_TXCSUM)
 163
 164 #define IFQ_MAXLEN      50
 165 #define IFNET_SLOWHZ    1               /* granularity is 1 second */
 166
 167 /*
 168  * Message format for use in obtaining information about interfaces
 169  * from getkerninfo and the routing socket
 170  */
 171 struct if_msghdr {
 172         u_short ifm_msglen;     /* to skip over non-understood messages */
 173         u_char  ifm_version;    /* future binary compatibility */
 174         u_char  ifm_type;       /* message type */
 175         int     ifm_addrs;      /* like rtm_addrs */
 176         int     ifm_flags;      /* value of if_flags */
 177         u_short ifm_index;      /* index for associated ifp */
 178         struct  if_data ifm_data;/* statistics and other data about if */
 179 };
 180
 181 /*
 182  * Message format for use in obtaining information about interface addresses
 183  * from getkerninfo and the routing socket
 184  */
 185 struct ifa_msghdr {
 186         u_short ifam_msglen;    /* to skip over non-understood messages */
 187         u_char  ifam_version;   /* future binary compatibility */
 188         u_char  ifam_type;      /* message type */
 189         int     ifam_addrs;     /* like rtm_addrs */
 190         int     ifam_flags;     /* value of ifa_flags */
 191         u_short ifam_index;     /* index for associated ifp */
 192         int     ifam_metric;    /* value of ifa_metric */
 193 };
 194
 195 /*
 196  * Message format for use in obtaining information about multicast addresses
 197  * from the routing socket
 198  */
 199 struct ifma_msghdr {
 200         u_short ifmam_msglen;   /* to skip over non-understood messages */
 201         u_char  ifmam_version;  /* future binary compatibility */
 202         u_char  ifmam_type;     /* message type */
 203         int     ifmam_addrs;    /* like rtm_addrs */
 204         int     ifmam_flags;    /* value of ifa_flags */
 205         u_short ifmam_index;    /* index for associated ifp */
 206 };
 207
 208 /*
 209  * Message format announcing the arrival or departure of a network interface.
 210  */
 211 struct if_announcemsghdr {
 212         u_short ifan_msglen;    /* to skip over non-understood messages */
 213         u_char  ifan_version;   /* future binary compatibility */
 214         u_char  ifan_type;      /* message type */
 215         u_short ifan_index;     /* index for associated ifp */
 216         char    ifan_name[IFNAMSIZ]; /* if name, e.g. "en0" */
 217         u_short ifan_what;      /* what type of announcement */
 218 };
 219
 220 #define IFAN_ARRIVAL    0       /* interface arrival */
 221 #define IFAN_DEPARTURE  1       /* interface departure */
 222
 223 /*
 224  * Interface request structure used for socket
 225  * ioctl's.  All interface ioctl's must have parameter
 226  * definitions which begin with ifr_name.  The
 227  * remainder may be interface specific.
 228  */
 229 struct  ifreq {
 230         char    ifr_name[IFNAMSIZ];             /* if name, e.g. "en0" */
 231         union {
 232                 struct  sockaddr ifru_addr;
 233                 struct  sockaddr ifru_dstaddr;
 234                 struct  sockaddr ifru_broadaddr;
 235                 short   ifru_flags[2];
 236                 int     ifru_metric;
 237                 int     ifru_mtu;
 238                 int     ifru_phys;
 239                 int     ifru_media;
 240                 void   *ifru_data;
 241                 int     ifru_cap[2];
 242                 int     ifru_pollcpu;
 243         } ifr_ifru;
 244 #define ifr_addr        ifr_ifru.ifru_addr      /* address */
 245 #define ifr_dstaddr     ifr_ifru.ifru_dstaddr   /* other end of p-to-p link */
 246 #define ifr_broadaddr   ifr_ifru.ifru_broadaddr /* broadcast address */
 247 #define ifr_flags       ifr_ifru.ifru_flags[0]  /* flags (low 16 bits) */
 248 #define ifr_flagshigh   ifr_ifru.ifru_flags[1]  /* flags (high 16 bits) */
 249 #define ifr_metric      ifr_ifru.ifru_metric    /* metric */
 250 #define ifr_mtu         ifr_ifru.ifru_mtu       /* mtu */
 251 #define ifr_phys        ifr_ifru.ifru_phys      /* physical wire */
 252 #define ifr_media       ifr_ifru.ifru_media     /* physical media */
 253 #define ifr_data        ifr_ifru.ifru_data      /* for use by interface */
 254 #define ifr_reqcap      ifr_ifru.ifru_cap[0]    /* requested capabilities */
 255 #define ifr_curcap      ifr_ifru.ifru_cap[1]    /* current capabilities */
 256 #define ifr_pollcpu     ifr_ifru.ifru_pollcpu   /* polling(4) cpu */
 257 };
 258
 259 #define _SIZEOF_ADDR_IFREQ(ifr) \
 260         ((ifr).ifr_addr.sa_len > sizeof(struct sockaddr) ? \
 261          (sizeof(struct ifreq) - sizeof(struct sockaddr) + \
 262           (ifr).ifr_addr.sa_len) : sizeof(struct ifreq))
 263
 264 struct ifaliasreq {
 265         char    ifra_name[IFNAMSIZ];            /* if name, e.g. "en0" */
 266         struct  sockaddr ifra_addr;
 267         struct  sockaddr ifra_broadaddr;
 268         struct  sockaddr ifra_mask;
 269 };
 270
 271 struct ifmediareq {
 272         char    ifm_name[IFNAMSIZ];     /* if name, e.g. "en0" */
 273         int     ifm_current;            /* current media options */
 274         int     ifm_mask;               /* don't care mask */
 275         int     ifm_status;             /* media status */
 276         int     ifm_active;             /* active options */
 277         int     ifm_count;              /* # entries in ifm_ulist array */
 278         int     *ifm_ulist;             /* media words */
 279 };
 280
 281 struct  ifdrv {
 282         char            ifd_name[IFNAMSIZ];     /* if name, e.g. "en0" */
 283         unsigned long   ifd_cmd;
 284         size_t          ifd_len;
 285         void            *ifd_data;
 286 };
 287
 288 /*
 289  * Structure used to retrieve aux status data from interfaces.
 290  * Kernel suppliers to this interface should respect the formatting
 291  * needed by ifconfig(8): each line starts with a TAB and ends with
 292  * a newline.  The canonical example to copy and paste is in if_tun.c.
 293  */
 294
 295 #define IFSTATMAX       800             /* 10 lines of text */
 296 struct ifstat {
 297         char    ifs_name[IFNAMSIZ];     /* if name, e.g. "en0" */
 298         char    ascii[IFSTATMAX + 1];
 299 };
 300
 301 /*
 302  * Structure used in SIOCGIFCONF request.
 303  * Used to retrieve interface configuration
 304  * for machine (useful for programs which
 305  * must know all networks accessible).
 306  */
 307 struct  ifconf {
 308         int     ifc_len;                /* size of associated buffer */
 309         union {
 310                 caddr_t ifcu_buf;
 311                 struct  ifreq *ifcu_req;
 312         } ifc_ifcu;
 313 #define ifc_buf ifc_ifcu.ifcu_buf       /* buffer address */
 314 #define ifc_req ifc_ifcu.ifcu_req       /* array of structures returned */
 315 };
 316
 317
 318 /*
 319  * Structure for SIOC[AGD]LIFADDR
 320  */
 321 struct if_laddrreq {
 322         char    iflr_name[IFNAMSIZ];
 323         u_int   flags;
 324 #define IFLR_PREFIX     0x8000  /* in: prefix given  out: kernel fills id */
 325         u_int   prefixlen;         /* in/out */
 326         struct  sockaddr_storage addr;   /* in/out */
 327         struct  sockaddr_storage dstaddr; /* out */
 328 };
 329
 330 #ifndef _KERNEL
 331 struct if_nameindex {
 332         u_int   if_index;       /* 1, 2, ... */
 333         const char *if_name;    /* null terminated name: "le0", ... */
 334 };
 335
 336 __BEGIN_DECLS
 337 u_int    if_nametoindex (const char *);
 338 char    *if_indextoname(u_int, char *);
 339 struct   if_nameindex *if_nameindex (void);
 340 void     if_freenameindex (struct if_nameindex *);
 341 __END_DECLS
 342 #endif
 343
 344 #ifdef _KERNEL
 345 struct thread;
 346 struct ucred;
 347
 348 int     prison_if (struct ucred *cred, struct sockaddr *sa);
 349
 350 /* XXX - this should go away soon. */
 351 #include <net/if_var.h>
 352 #endif
 353
 354 #endif /* !_NET_IF_H_ */