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vif.h revision 1.1 
      1 /*
      2  * The mrouted program is covered by the license in the accompanying file
      3  * named "LICENSE".  Use of the mrouted program represents acceptance of
      4  * the terms and conditions listed in that file.
      5  *
      6  * The mrouted program is COPYRIGHT 1989 by The Board of Trustees of
      7  * Leland Stanford Junior University.
      8  *
      9  *
     10  * $Id: vif.h,v 1.1 1994/01/11 20:16:06 brezak Exp $
     11  */
     12 
     13 /*
     14  * User level Virtual Interface structure
     15  *
     16  * A "virtual interface" is either a physical, multicast-capable interface
     17  * (called a "phyint") or a virtual point-to-point link (called a "tunnel").
     18  * (Note: all addresses, subnet numbers and masks are kept in NETWORK order.)
     19  */
     20 struct uvif {
     21     u_short	     uv_flags;	    /* VIFF_ flags defined below            */
     22     u_char	     uv_metric;     /* cost of this vif                     */
     23     u_char	     uv_threshold;  /* min ttl required to forward on vif   */
     24     u_long	     uv_lcl_addr;   /* local address of this vif            */
     25     u_long	     uv_rmt_addr;   /* remote end-point addr (tunnels only) */
     26     u_long	     uv_subnet;     /* subnet number         (phyints only) */
     27     u_long	     uv_subnetmask; /* subnet mask           (phyints only) */
     28     u_long	     uv_subnetbcast;/* subnet broadcast addr (phyints only) */
     29     char	     uv_name[IFNAMSIZ]; /* interface name                   */
     30     struct listaddr *uv_groups;     /* list of local groups  (phyints only) */
     31     struct listaddr *uv_neighbors;  /* list of neighboring routers          */
     32 };
     33 
     34 #define VIFF_KERNEL_FLAGS	(VIFF_TUNNEL|VIFF_SRCRT)
     35 #define VIFF_DOWN		0x0100	       /* kernel state of interface */
     36 #define VIFF_DISABLED		0x0200	       /* administratively disabled */
     37 #define VIFF_QUERIER		0x0400	       /* I am the subnet's querier */
     38 
     39 
     40 struct listaddr {
     41     struct listaddr *al_next;		/* link to next addr, MUST BE FIRST */
     42     u_long	     al_addr;		/* local group or neighbor address  */
     43     u_long	     al_timer;		/* for timing out group or neighbor */
     44 };
     45 
     46 
     47 #define NO_VIF		((vifi_t)MAXVIFS)  /* An invalid vif index */
     48