2 * Copyright (c) 1983, 1993
3 * The Regents of the University of California. All rights reserved.
5 * Copyright (c) 1995 John Hay. All rights reserved.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 4. Neither the name of the University nor the names of its contributors
16 * may be used to endorse or promote products derived from this software
17 * without specific prior written permission.
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * static char sccsid[] = "@(#)if.c 5.1 (Berkeley) 6/4/85"; (routed/if.c)
33 * $FreeBSD: src/usr.sbin/IPXrouted/if.c,v 1.5 1999/08/28 01:15:02 peter Exp $
35 * @(#)if.c 8.1 (Berkeley) 6/5/93
39 * Routing Table Management Daemon
43 extern struct interface *ifnet;
46 * Find the interface with address addr.
49 if_ifwithaddr(struct sockaddr *addr)
51 struct interface *ifp;
53 #define same(a1, a2) \
54 (bcmp((caddr_t)((a1)->sa_data), (caddr_t)((a2)->sa_data), 10) == 0)
55 for (ifp = ifnet; ifp; ifp = ifp->int_next) {
56 if (ifp->int_flags & IFF_REMOTE)
58 if (ifp->int_addr.sa_family != addr->sa_family)
60 if (same(&ifp->int_addr, addr))
62 if ((ifp->int_flags & IFF_BROADCAST) &&
63 same(&ifp->int_broadaddr, addr))
70 * Find the point-to-point interface with destination address addr.
73 if_ifwithdstaddr(struct sockaddr *addr)
75 struct interface *ifp;
77 for (ifp = ifnet; ifp; ifp = ifp->int_next) {
78 if ((ifp->int_flags & IFF_POINTOPOINT) == 0)
80 if (same(&ifp->int_dstaddr, addr))
87 * Find the interface on the network
88 * of the specified address.
91 if_ifwithnet(struct sockaddr *addr)
93 struct interface *ifp;
94 int af = addr->sa_family;
95 int (*netmatch)(struct sockaddr *, struct sockaddr *);
99 netmatch = afswitch[af].af_netmatch;
100 for (ifp = ifnet; ifp; ifp = ifp->int_next) {
101 if (ifp->int_flags & IFF_REMOTE)
103 if (af != ifp->int_addr.sa_family)
105 if ((*netmatch)(addr, &ifp->int_addr))
112 * Find an interface from which the specified address
113 * should have come from. Used for figuring out which
114 * interface a packet came in on -- for tracing.
117 if_iflookup(struct sockaddr *addr)
119 struct interface *ifp, *maybe;
120 int af = addr->sa_family;
121 int (*netmatch)(struct sockaddr *, struct sockaddr *);
126 netmatch = afswitch[af].af_netmatch;
127 for (ifp = ifnet; ifp; ifp = ifp->int_next) {
128 if (ifp->int_addr.sa_family != af)
130 if (same(&ifp->int_addr, addr))
132 if ((ifp->int_flags & IFF_BROADCAST) &&
133 same(&ifp->int_broadaddr, addr))
135 if (maybe == NULL && (*netmatch)(addr, &ifp->int_addr))