1 /* 2 * Copyright (c) 1983 Regents of the University of California. 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms are permitted 6 * provided that this notice is preserved and that due credit is given 7 * to the University of California at Berkeley. The name of the University 8 * may not be used to endorse or promote products derived from this 9 * software without specific prior written permission. This software 10 * is provided ``as is'' without express or implied warranty. 11 * 12 * @(#)interface.h 5.4 (Berkeley) 02/16/88 13 */ 14 15 /* 16 * Routing table management daemon. 17 */ 18 19 /* 20 * An ``interface'' is similar to an ifnet structure, 21 * except it doesn't contain q'ing info, and it also 22 * handles ``logical'' interfaces (remote gateways 23 * that we want to keep polling even if they go down). 24 * The list of interfaces which we maintain is used 25 * in supplying the gratuitous routing table updates. 26 */ 27 struct interface { 28 struct interface *int_next; 29 struct sockaddr int_addr; /* address on this host */ 30 union { 31 struct sockaddr intu_broadaddr; 32 struct sockaddr intu_dstaddr; 33 } int_intu; 34 #define int_broadaddr int_intu.intu_broadaddr /* broadcast address */ 35 #define int_dstaddr int_intu.intu_dstaddr /* other end of p-to-p link */ 36 int int_metric; /* init's routing entry */ 37 int int_flags; /* see below */ 38 /* START INTERNET SPECIFIC */ 39 u_long int_net; /* network # */ 40 u_long int_netmask; /* net mask for addr */ 41 u_long int_subnet; /* subnet # */ 42 u_long int_subnetmask; /* subnet mask for addr */ 43 /* END INTERNET SPECIFIC */ 44 struct ifdebug int_input, int_output; /* packet tracing stuff */ 45 int int_ipackets; /* input packets received */ 46 int int_opackets; /* output packets sent */ 47 char *int_name; /* from kernel if structure */ 48 u_short int_transitions; /* times gone up-down */ 49 }; 50 51 /* 52 * 0x1 to 0x10 are reused from the kernel's ifnet definitions, 53 * the others agree with the RTS_ flags defined elsewhere. 54 */ 55 #define IFF_UP 0x1 /* interface is up */ 56 #define IFF_BROADCAST 0x2 /* broadcast address valid */ 57 #define IFF_DEBUG 0x4 /* turn on debugging */ 58 #define IFF_LOOPBACK 0x8 /* software loopback net */ 59 #define IFF_POINTOPOINT 0x10 /* interface is point-to-point link */ 60 61 #define IFF_SUBNET 0x1000 /* interface on subnetted network */ 62 #define IFF_PASSIVE 0x2000 /* can't tell if up/down */ 63 #define IFF_INTERFACE 0x4000 /* hardware interface */ 64 #define IFF_REMOTE 0x8000 /* interface isn't on this machine */ 65 66 struct interface *if_ifwithaddr(); 67 struct interface *if_ifwithdstaddr(); 68 struct interface *if_ifwithnet(); 69 struct interface *if_iflookup(); 70