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 * 3. All advertising materials mentioning features or use of this software
16 * must display the following acknowledgement:
17 * This product includes software developed by the University of
18 * California, Berkeley and its contributors.
19 * 4. Neither the name of the University nor the names of its contributors
20 * may be used to endorse or promote products derived from this software
21 * without specific prior written permission.
23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
35 * static char sccsid[] = "@(#)if.c 5.1 (Berkeley) 6/4/85"; (routed/if.c)
37 * $FreeBSD: src/usr.sbin/IPXrouted/if.c,v 1.5 1999/08/28 01:15:02 peter Exp $
38 * $DragonFly: src/usr.sbin/IPXrouted/if.c,v 1.2 2003/06/17 04:29:52 dillon Exp $
40 * @(#)if.c 8.1 (Berkeley) 6/5/93
44 * Routing Table Management Daemon
48 extern struct interface *ifnet;
51 * Find the interface with address addr.
55 struct sockaddr *addr;
57 register struct interface *ifp;
59 #define same(a1, a2) \
60 (bcmp((caddr_t)((a1)->sa_data), (caddr_t)((a2)->sa_data), 10) == 0)
61 for (ifp = ifnet; ifp; ifp = ifp->int_next) {
62 if (ifp->int_flags & IFF_REMOTE)
64 if (ifp->int_addr.sa_family != addr->sa_family)
66 if (same(&ifp->int_addr, addr))
68 if ((ifp->int_flags & IFF_BROADCAST) &&
69 same(&ifp->int_broadaddr, addr))
76 * Find the point-to-point interface with destination address addr.
79 if_ifwithdstaddr(addr)
80 struct sockaddr *addr;
82 register struct interface *ifp;
84 for (ifp = ifnet; ifp; ifp = ifp->int_next) {
85 if ((ifp->int_flags & IFF_POINTOPOINT) == 0)
87 if (same(&ifp->int_dstaddr, addr))
94 * Find the interface on the network
95 * of the specified address.
99 register struct sockaddr *addr;
101 register struct interface *ifp;
102 register int af = addr->sa_family;
103 register int (*netmatch)();
107 netmatch = afswitch[af].af_netmatch;
108 for (ifp = ifnet; ifp; ifp = ifp->int_next) {
109 if (ifp->int_flags & IFF_REMOTE)
111 if (af != ifp->int_addr.sa_family)
113 if ((*netmatch)(addr, &ifp->int_addr))
120 * Find an interface from which the specified address
121 * should have come from. Used for figuring out which
122 * interface a packet came in on -- for tracing.
126 struct sockaddr *addr;
128 register struct interface *ifp, *maybe;
129 register int af = addr->sa_family;
130 register int (*netmatch)();
135 netmatch = afswitch[af].af_netmatch;
136 for (ifp = ifnet; ifp; ifp = ifp->int_next) {
137 if (ifp->int_addr.sa_family != af)
139 if (same(&ifp->int_addr, addr))
141 if ((ifp->int_flags & IFF_BROADCAST) &&
142 same(&ifp->int_broadaddr, addr))
144 if (maybe == 0 && (*netmatch)(addr, &ifp->int_addr))