The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/net/if.h

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    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  * $FreeBSD$
   35  */
   36 
   37 #ifndef _NET_IF_H_
   38 #define _NET_IF_H_
   39 
   40 /*
   41  * <net/if.h> does not depend on <sys/time.h> on most other systems.  This
   42  * helps userland compatability.  (struct timeval ifi_lastchange)
   43  */
   44 #ifndef KERNEL
   45 #include <sys/time.h>
   46 #endif
   47 
   48 /*
   49  * Structure describing information about an interface
   50  * which may be of interest to management entities.
   51  */
   52 struct if_data {
   53         /* generic interface information */
   54         u_char  ifi_type;               /* ethernet, tokenring, etc */
   55         u_char  ifi_physical;           /* e.g., AUI, Thinnet, 10base-T, etc */
   56         u_char  ifi_addrlen;            /* media address length */
   57         u_char  ifi_hdrlen;             /* media header length */
   58         u_char  ifi_recvquota;          /* polling quota for receive intrs */
   59         u_char  ifi_xmitquota;          /* polling quota for xmit intrs */
   60         u_long  ifi_mtu;                /* maximum transmission unit */
   61         u_long  ifi_metric;             /* routing metric (external only) */
   62         u_long  ifi_baudrate;           /* linespeed */
   63         /* volatile statistics */
   64         u_long  ifi_ipackets;           /* packets received on interface */
   65         u_long  ifi_ierrors;            /* input errors on interface */
   66         u_long  ifi_opackets;           /* packets sent on interface */
   67         u_long  ifi_oerrors;            /* output errors on interface */
   68         u_long  ifi_collisions;         /* collisions on csma interfaces */
   69         u_long  ifi_ibytes;             /* total number of octets received */
   70         u_long  ifi_obytes;             /* total number of octets sent */
   71         u_long  ifi_imcasts;            /* packets received via multicast */
   72         u_long  ifi_omcasts;            /* packets sent via multicast */
   73         u_long  ifi_iqdrops;            /* dropped on input, this interface */
   74         u_long  ifi_noproto;            /* destined for unsupported protocol */
   75         u_long  ifi_recvtiming;         /* usec spent receiving when timing */
   76         u_long  ifi_xmittiming;         /* usec spent xmitting when timing */
   77         struct  timeval ifi_lastchange; /* time of last administrative change */
   78 };
   79 
   80 #define IFF_UP          0x1             /* interface is up */
   81 #define IFF_BROADCAST   0x2             /* broadcast address valid */
   82 #define IFF_DEBUG       0x4             /* turn on debugging */
   83 #define IFF_LOOPBACK    0x8             /* is a loopback net */
   84 #define IFF_POINTOPOINT 0x10            /* interface is point-to-point link */
   85 /*#define IFF_NOTRAILERS 0x20            * obsolete: avoid use of trailers */
   86 #define IFF_RUNNING     0x40            /* resources allocated */
   87 #define IFF_NOARP       0x80            /* no address resolution protocol */
   88 #define IFF_PROMISC     0x100           /* receive all packets */
   89 #define IFF_ALLMULTI    0x200           /* receive all multicast packets */
   90 #define IFF_OACTIVE     0x400           /* transmission in progress */
   91 #define IFF_SIMPLEX     0x800           /* can't hear own transmissions */
   92 #define IFF_LINK0       0x1000          /* per link layer defined bit */
   93 #define IFF_LINK1       0x2000          /* per link layer defined bit */
   94 #define IFF_LINK2       0x4000          /* per link layer defined bit */
   95 #define IFF_ALTPHYS     IFF_LINK2       /* use alternate physical connection */
   96 #define IFF_MULTICAST   0x8000          /* supports multicast */
   97 
   98 /* flags set internally only: */
   99 #define IFF_CANTCHANGE \
  100         (IFF_BROADCAST|IFF_POINTOPOINT|IFF_RUNNING|IFF_OACTIVE|\
  101             IFF_SIMPLEX|IFF_MULTICAST|IFF_ALLMULTI)
  102 
  103 #define IFQ_MAXLEN      50
  104 #define IFNET_SLOWHZ    1               /* granularity is 1 second */
  105 
  106 /*
  107  * Message format for use in obtaining information about interfaces
  108  * from getkerninfo and the routing socket
  109  */
  110 struct if_msghdr {
  111         u_short ifm_msglen;     /* to skip over non-understood messages */
  112         u_char  ifm_version;    /* future binary compatability */
  113         u_char  ifm_type;       /* message type */
  114         int     ifm_addrs;      /* like rtm_addrs */
  115         int     ifm_flags;      /* value of if_flags */
  116         u_short ifm_index;      /* index for associated ifp */
  117         struct  if_data ifm_data;/* statistics and other data about if */
  118 };
  119 
  120 /*
  121  * Message format for use in obtaining information about interface addresses
  122  * from getkerninfo and the routing socket
  123  */
  124 struct ifa_msghdr {
  125         u_short ifam_msglen;    /* to skip over non-understood messages */
  126         u_char  ifam_version;   /* future binary compatability */
  127         u_char  ifam_type;      /* message type */
  128         int     ifam_addrs;     /* like rtm_addrs */
  129         int     ifam_flags;     /* value of ifa_flags */
  130         u_short ifam_index;     /* index for associated ifp */
  131         int     ifam_metric;    /* value of ifa_metric */
  132 };
  133 
  134 /*
  135  * Message format for use in obtaining information about multicast addresses
  136  * from the routing socket
  137  */
  138 struct ifma_msghdr {
  139         u_short ifmam_msglen;   /* to skip over non-understood messages */
  140         u_char  ifmam_version;  /* future binary compatability */
  141         u_char  ifmam_type;     /* message type */
  142         int     ifmam_addrs;    /* like rtm_addrs */
  143         int     ifmam_flags;    /* value of ifa_flags */
  144         u_short ifmam_index;    /* index for associated ifp */
  145 };
  146 
  147 /*
  148  * Interface request structure used for socket
  149  * ioctl's.  All interface ioctl's must have parameter
  150  * definitions which begin with ifr_name.  The
  151  * remainder may be interface specific.
  152  */
  153 struct  ifreq {
  154 #define IFNAMSIZ        16
  155         char    ifr_name[IFNAMSIZ];             /* if name, e.g. "en0" */
  156         union {
  157                 struct  sockaddr ifru_addr;
  158                 struct  sockaddr ifru_dstaddr;
  159                 struct  sockaddr ifru_broadaddr;
  160                 short   ifru_flags;
  161                 int     ifru_metric;
  162                 int     ifru_mtu;
  163                 int     ifru_phys;
  164                 int     ifru_media;
  165                 caddr_t ifru_data;
  166         } ifr_ifru;
  167 #define ifr_addr        ifr_ifru.ifru_addr      /* address */
  168 #define ifr_dstaddr     ifr_ifru.ifru_dstaddr   /* other end of p-to-p link */
  169 #define ifr_broadaddr   ifr_ifru.ifru_broadaddr /* broadcast address */
  170 #define ifr_flags       ifr_ifru.ifru_flags     /* flags */
  171 #define ifr_metric      ifr_ifru.ifru_metric    /* metric */
  172 #define ifr_mtu         ifr_ifru.ifru_mtu       /* mtu */
  173 #define ifr_phys        ifr_ifru.ifru_phys      /* physical wire */
  174 #define ifr_media       ifr_ifru.ifru_media     /* physical media */
  175 #define ifr_data        ifr_ifru.ifru_data      /* for use by interface */
  176 };
  177 
  178 #define _SIZEOF_ADDR_IFREQ(ifr) \
  179         ((ifr).ifr_addr.sa_len > sizeof(struct sockaddr) ? \
  180          (sizeof(struct ifreq) - sizeof(struct sockaddr) + \
  181           (ifr).ifr_addr.sa_len) : sizeof(struct ifreq))
  182 
  183 struct ifaliasreq {
  184         char    ifra_name[IFNAMSIZ];            /* if name, e.g. "en0" */
  185         struct  sockaddr ifra_addr;
  186         struct  sockaddr ifra_broadaddr;
  187         struct  sockaddr ifra_mask;
  188 };
  189 
  190 struct ifmediareq {
  191         char    ifm_name[IFNAMSIZ];     /* if name, e.g. "en0" */
  192         int     ifm_current;            /* current media options */
  193         int     ifm_mask;               /* don't care mask */
  194         int     ifm_status;             /* media status */
  195         int     ifm_active;             /* active options */
  196         int     ifm_count;              /* # entries in ifm_ulist array */
  197         int     *ifm_ulist;             /* media words */
  198 };
  199 /*
  200  * Structure used in SIOCGIFCONF request.
  201  * Used to retrieve interface configuration
  202  * for machine (useful for programs which
  203  * must know all networks accessible).
  204  */
  205 struct  ifconf {
  206         int     ifc_len;                /* size of associated buffer */
  207         union {
  208                 caddr_t ifcu_buf;
  209                 struct  ifreq *ifcu_req;
  210         } ifc_ifcu;
  211 #define ifc_buf ifc_ifcu.ifcu_buf       /* buffer address */
  212 #define ifc_req ifc_ifcu.ifcu_req       /* array of structures returned */
  213 };
  214 
  215 #ifdef KERNEL
  216 #ifdef MALLOC_DECLARE
  217 MALLOC_DECLARE(M_IFADDR);
  218 MALLOC_DECLARE(M_IFMADDR);
  219 #endif
  220 #endif
  221 
  222 /* XXX - this should go away soon */
  223 #ifdef KERNEL
  224 #include <net/if_var.h>
  225 #endif
  226 
  227 #endif /* !_NET_IF_H_ */

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