46 static struct interface *ahash_tbl[AHASH_LEN];
50 static struct interface *bhash_tbl[BHASH_LEN];
53 /* hash for physical interface names.
58 static struct interface *nhash_tbl[NHASH_LEN];
72 int	have_ripv1_out;			/* have a RIPv1 interface */
76 static void if_bad(struct interface *);
77 static int addrouteforif(struct interface *);
79 static struct interface**
92 /* Link a new interface into the lists and hash tables.
95 if_link(struct interface *ifp)  in if_link()
97 	struct interface **hifp;  in if_link()
131 /* Find the interface with an address
133 struct interface *
138 	struct interface *ifp, *possible = NULL;  in ifwithaddr()
169 /* find the interface with a name
171 static struct interface *
175 	struct interface *ifp;  in ifwithname()
181 			 * for the interface with the target name and address.  in ifwithname()
189 		/* If there is no known interface, maybe there is a  in ifwithname()
190 		 * new interface.  So just once look for new interfaces.  in ifwithname()
199 struct interface *
203 	struct interface *ifp;  in ifwithindex()
211 		/* If there is no known interface, maybe there is a  in ifwithindex()
212 		 * new interface.  So just once look for new interfaces.  in ifwithindex()
222 /* Find an interface from which the specified address
224  * interface a packet came in on.
226 struct interface *
229 	struct interface *ifp, *maybe;  in iflookup()
258 		/* If there is no known interface, maybe there is a  in iflookup()
259 		 * new interface.  So just once look for new interfaces.  in iflookup()
284  *	on the given interface for a given network.
285  *	If no interface is specified, look for the best fitting	interface.
289 	       struct interface *ifp)	/* as seen on this interface */  in ripv1_mask_net()
298 		/* If the target network is that of the associated interface  in ripv1_mask_net()
299 		 * on which it arrived, then use the netmask of the interface.  in ripv1_mask_net()
306 		 * to have the same network number of an interface, use the  in ripv1_mask_net()
307 		 * netmask of that interface.  If there is more than one  in ripv1_mask_net()
308 		 * such interface, prefer the interface with the longest  in ripv1_mask_net()
340 		struct interface *ifp)	/* as seen on this interface */  in ripv1_mask_host()
373 /* See a new interface duplicates an existing interface.
375 struct interface *
381 	struct interface *ifp;  in check_dup()
409 check_remote(struct interface *ifp)  in check_remote()
436 /* Delete an interface.
439 ifdel(struct interface *ifp)  in ifdel()
441 	struct interface *ifp1;  in ifdel()
464 		/* delete aliases when the main interface dies  in ifdel()
502 		/* Zap all routes associated with this interface.  in ifdel()
503 		 * Assume routes just using gateways beyond this interface  in ifdel()
516 /* Mark an interface ill.
519 if_sick(struct interface *ifp)  in if_sick()
531 /* Mark an interface dead.
534 if_bad(struct interface *ifp)  in if_bad()
536 	struct interface *ifp1;  in if_bad()
563 /* Mark an interface alive
566 if_ok(struct interface *ifp,  in if_ok()
569 	struct interface *ifp1;  in if_ok()
649 	struct interface ifs, ifs0, *ifp, *ifp1;  in ifinit()
673 	/* Fetch the interface list, without too many system calls  in ifinit()
740 		/* Prepare for the next address of this interface, which  in ifinit()
860 		/* Use a minimum metric of one.  Treat the interface metric  in ifinit()
864 		 * interface addresses is wrong.  It is not set by the  in ifinit()
888 		/* See if this is a familiar interface.  in ifinit()
912 				 * a changed interface.  in ifinit()
914 				trace_act("interface %s has changed",  in ifinit()
932 					msglog("interface %s to %s turned off",  in ifinit()
939 					trace_act("interface %s has been off"  in ifinit()
956 			 * see if the interface is broken.  in ifinit()
965 			/* If the interface just awoke, restart the counters.  in ifinit()
974 			 * counters wrap or the interface is reset.  in ifinit()
993 					trace_act("interface %s to %s"  in ifinit()
1003 					msglog("interface %s to %s broken:"  in ifinit()
1020 		/* This is a new interface.  in ifinit()
1026 		/* If it duplicates an existing interface,  in ifinit()
1071 		ifp = (struct interface *)rtmalloc(sizeof(*ifp), "ifinit ifp");  in ifinit()
1163 			trace_act("interface %s has disappeared",  in ifinit()
1173 		/* If we ever have a RIPv1 interface, assume we always will.  in ifinit()
1250 check_net_syn(struct interface *ifp)  in check_net_syn()
1257 	 * for this interface only if we are running RIPv1 on some other  in check_net_syn()
1258 	 * interface that is on a different class-A,B,or C network.  in check_net_syn()
1292 /* Add route for interface if not currently installed.
1296 static int					/* 0=bad interface */
1297 addrouteforif(struct interface *ifp)  in addrouteforif()
1309 	/* If the interface on a subnet, then install a RIPv1 route to  in addrouteforif()
1333 	/* We are finished if the correct main interface route exists.  in addrouteforif()
1334 	 * The right route must be for the right interface, not synthesized  in addrouteforif()
1355 			trace_act("re-install interface %s",  in addrouteforif()