* Copyright (c) 1983 Regents of the University of California.
* All rights reserved. The Berkeley software License Agreement
* specifies the terms and conditions for redistribution.
static char sccsid
[] = "@(#)if.c 5.3 (Berkeley) %G%";
* Routing Table Management Daemon
extern struct interface
*ifnet
;
* Find the interface with address addr.
register struct interface
*ifp
;
(bcmp((caddr_t)((a1)->sa_data), (caddr_t)((a2)->sa_data), 14) == 0)
for (ifp
= ifnet
; ifp
; ifp
= ifp
->int_next
) {
if (ifp
->int_flags
& IFF_REMOTE
)
if (ifp
->int_addr
.sa_family
!= addr
->sa_family
)
if (same(&ifp
->int_addr
, addr
))
if ((ifp
->int_flags
& IFF_BROADCAST
) &&
same(&ifp
->int_broadaddr
, addr
))
* Find the point-to-point interface with destination address addr.
register struct interface
*ifp
;
for (ifp
= ifnet
; ifp
; ifp
= ifp
->int_next
) {
if ((ifp
->int_flags
& IFF_POINTOPOINT
) == 0)
if (same(&ifp
->int_dstaddr
, addr
))
* Find the interface on the network
* of the specified address.
register struct sockaddr
*addr
;
register struct interface
*ifp
;
register int af
= addr
->sa_family
;
register int (*netmatch
)();
netmatch
= afswitch
[af
].af_netmatch
;
for (ifp
= ifnet
; ifp
; ifp
= ifp
->int_next
) {
if (ifp
->int_flags
& IFF_REMOTE
)
if (af
!= ifp
->int_addr
.sa_family
)
if ((*netmatch
)(addr
, &ifp
->int_addr
))
* Find an interface from which the specified address
* should have come from. Used for figuring out which
* interface a packet came in on -- for tracing.
register struct interface
*ifp
, *maybe
;
register int af
= addr
->sa_family
;
register int (*netmatch
)();
netmatch
= afswitch
[af
].af_netmatch
;
for (ifp
= ifnet
; ifp
; ifp
= ifp
->int_next
) {
if (ifp
->int_addr
.sa_family
!= af
)
if (same(&ifp
->int_addr
, addr
))
if ((ifp
->int_flags
& IFF_BROADCAST
) &&
same(&ifp
->int_broadaddr
, addr
))
if ((ifp
->int_flags
& IFF_POINTOPOINT
) &&
same(&ifp
->int_dstaddr
, addr
))
if (maybe
== 0 && (*netmatch
)(addr
, &ifp
->int_addr
))