usr/src/sbin/routed/interface.h

/*
 * Copyright (c) 1983 Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms are permitted
 * provided that: (1) source distributions retain this entire copyright
 * notice and comment, and (2) distributions including binaries display
 * the following acknowledgement:  ``This product includes software
 * developed by the University of California, Berkeley and its contributors''
 * in the documentation or other materials provided with the distribution
 * and in all advertising materials mentioning features or use of this
 * software. Neither the name of the University nor the names of its
 * contributors may be used to endorse or promote products derived
 * from this software without specific prior written permission.
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 *
 *      @(#)interface.h 5.6 (Berkeley) 6/1/90
 */

/*
 * Routing table management daemon.
 */

/*
 * An ``interface'' is similar to an ifnet structure,
 * except it doesn't contain q'ing info, and it also
 * handles ``logical'' interfaces (remote gateways
 * that we want to keep polling even if they go down).
 * The list of interfaces which we maintain is used
 * in supplying the gratuitous routing table updates.
 */
struct interface {
        struct  interface *int_next;
        struct  sockaddr int_addr;              /* address on this host */
        union {
                struct  sockaddr intu_broadaddr;
                struct  sockaddr intu_dstaddr;
        } int_intu;
#define int_broadaddr   int_intu.intu_broadaddr /* broadcast address */
#define int_dstaddr     int_intu.intu_dstaddr   /* other end of p-to-p link */
        int     int_metric;                     /* init's routing entry */
        int     int_flags;                      /* see below */
        /* START INTERNET SPECIFIC */
        u_long  int_net;                        /* network # */
        u_long  int_netmask;                    /* net mask for addr */
        u_long  int_subnet;                     /* subnet # */
        u_long  int_subnetmask;                 /* subnet mask for addr */
        /* END INTERNET SPECIFIC */
        struct  ifdebug int_input, int_output;  /* packet tracing stuff */
        int     int_ipackets;                   /* input packets received */
        int     int_opackets;                   /* output packets sent */
        char    *int_name;                      /* from kernel if structure */
        u_short int_transitions;                /* times gone up-down */
};

/*
 * 0x1 to 0x10 are reused from the kernel's ifnet definitions,
 * the others agree with the RTS_ flags defined elsewhere.
 */
#define IFF_UP          0x1             /* interface is up */
#define IFF_BROADCAST   0x2             /* broadcast address valid */
#define IFF_DEBUG       0x4             /* turn on debugging */
#define IFF_LOOPBACK    0x8             /* software loopback net */
#define IFF_POINTOPOINT 0x10            /* interface is point-to-point link */

#define IFF_SUBNET      0x1000          /* interface on subnetted network */
#define IFF_PASSIVE     0x2000          /* can't tell if up/down */
#define IFF_INTERFACE   0x4000          /* hardware interface */
#define IFF_REMOTE      0x8000          /* interface isn't on this machine */

struct  interface *if_ifwithaddr();
struct  interface *if_ifwithdstaddr();
struct  interface *if_ifwithnet();
struct  interface *if_iflookup();