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Annotation of 43BSD/etc/routed/interface.h, revision 1.1.1.1

1.1       root        1: /*
                      2:  * Copyright (c) 1983 Regents of the University of California.
                      3:  * All rights reserved.  The Berkeley software License Agreement
                      4:  * specifies the terms and conditions for redistribution.
                      5:  *
                      6:  *     @(#)interface.h 5.3 (Berkeley) 4/20/86
                      7:  */
                      8: 
                      9: /*
                     10:  * Routing table management daemon.
                     11:  */
                     12: 
                     13: /*
                     14:  * An ``interface'' is similar to an ifnet structure,
                     15:  * except it doesn't contain q'ing info, and it also
                     16:  * handles ``logical'' interfaces (remote gateways
                     17:  * that we want to keep polling even if they go down).
                     18:  * The list of interfaces which we maintain is used
                     19:  * in supplying the gratuitous routing table updates.
                     20:  */
                     21: struct interface {
                     22:        struct  interface *int_next;
                     23:        struct  sockaddr int_addr;              /* address on this host */
                     24:        union {
                     25:                struct  sockaddr intu_broadaddr;
                     26:                struct  sockaddr intu_dstaddr;
                     27:        } int_intu;
                     28: #define        int_broadaddr   int_intu.intu_broadaddr /* broadcast address */
                     29: #define        int_dstaddr     int_intu.intu_dstaddr   /* other end of p-to-p link */
                     30:        int     int_metric;                     /* init's routing entry */
                     31:        int     int_flags;                      /* see below */
                     32:        /* START INTERNET SPECIFIC */
                     33:        u_long  int_net;                        /* network # */
                     34:        u_long  int_netmask;                    /* net mask for addr */
                     35:        u_long  int_subnet;                     /* subnet # */
                     36:        u_long  int_subnetmask;                 /* subnet mask for addr */
                     37:        /* END INTERNET SPECIFIC */
                     38:        struct  ifdebug int_input, int_output;  /* packet tracing stuff */
                     39:        int     int_ipackets;                   /* input packets received */
                     40:        int     int_opackets;                   /* output packets sent */
                     41:        char    *int_name;                      /* from kernel if structure */
                     42:        u_short int_transitions;                /* times gone up-down */
                     43: };
                     44: 
                     45: /*
                     46:  * 0x1 to 0x10 are reused from the kernel's ifnet definitions,
                     47:  * the others agree with the RTS_ flags defined elsewhere.
                     48:  */
                     49: #define        IFF_UP          0x1             /* interface is up */
                     50: #define        IFF_BROADCAST   0x2             /* broadcast address valid */
                     51: #define        IFF_DEBUG       0x4             /* turn on debugging */
                     52: #define        IFF_LOOPBACK    0x8             /* software loopback net */
                     53: #define        IFF_POINTOPOINT 0x10            /* interface is point-to-point link */
                     54: 
                     55: #define        IFF_SUBNET      0x1000          /* interface on subnetted network */
                     56: #define        IFF_PASSIVE     0x2000          /* can't tell if up/down */
                     57: #define        IFF_INTERFACE   0x4000          /* hardware interface */
                     58: #define        IFF_REMOTE      0x8000          /* interface isn't on this machine */
                     59: 
                     60: struct interface *if_ifwithaddr();
                     61: struct interface *if_ifwithdstaddr();
                     62: struct interface *if_ifwithnet();
                     63: struct interface *if_iflookup();

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