mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-20 11:11:24 +00:00
3219c922a9
Note: The sources for XNSrouted and routed are being imported to usr.sbin instead of sbin.
149 lines
4.2 KiB
C
149 lines
4.2 KiB
C
/*
|
|
* Copyright (c) 1983, 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the University of
|
|
* California, Berkeley and its contributors.
|
|
* 4. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
#ifndef lint
|
|
static char sccsid[] = "@(#)if.c 8.1 (Berkeley) 6/5/93";
|
|
#endif /* not lint */
|
|
|
|
/*
|
|
* Routing Table Management Daemon
|
|
*/
|
|
#include "defs.h"
|
|
|
|
extern struct interface *ifnet;
|
|
|
|
/*
|
|
* Find the interface with address addr.
|
|
*/
|
|
struct interface *
|
|
if_ifwithaddr(addr)
|
|
struct sockaddr *addr;
|
|
{
|
|
register struct interface *ifp;
|
|
|
|
#define same(a1, a2) \
|
|
(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)
|
|
continue;
|
|
if (ifp->int_addr.sa_family != addr->sa_family)
|
|
continue;
|
|
if (same(&ifp->int_addr, addr))
|
|
break;
|
|
if ((ifp->int_flags & IFF_BROADCAST) &&
|
|
same(&ifp->int_broadaddr, addr))
|
|
break;
|
|
}
|
|
return (ifp);
|
|
}
|
|
|
|
/*
|
|
* Find the point-to-point interface with destination address addr.
|
|
*/
|
|
struct interface *
|
|
if_ifwithdstaddr(addr)
|
|
struct sockaddr *addr;
|
|
{
|
|
register struct interface *ifp;
|
|
|
|
for (ifp = ifnet; ifp; ifp = ifp->int_next) {
|
|
if ((ifp->int_flags & IFF_POINTOPOINT) == 0)
|
|
continue;
|
|
if (same(&ifp->int_dstaddr, addr))
|
|
break;
|
|
}
|
|
return (ifp);
|
|
}
|
|
|
|
/*
|
|
* Find the interface on the network
|
|
* of the specified address.
|
|
*/
|
|
struct interface *
|
|
if_ifwithnet(addr)
|
|
register struct sockaddr *addr;
|
|
{
|
|
register struct interface *ifp;
|
|
register int af = addr->sa_family;
|
|
register int (*netmatch)();
|
|
|
|
if (af >= af_max)
|
|
return (0);
|
|
netmatch = afswitch[af].af_netmatch;
|
|
for (ifp = ifnet; ifp; ifp = ifp->int_next) {
|
|
if (ifp->int_flags & IFF_REMOTE)
|
|
continue;
|
|
if (af != ifp->int_addr.sa_family)
|
|
continue;
|
|
if ((*netmatch)(addr, &ifp->int_addr))
|
|
break;
|
|
}
|
|
return (ifp);
|
|
}
|
|
|
|
/*
|
|
* 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.
|
|
*/
|
|
struct interface *
|
|
if_iflookup(addr)
|
|
struct sockaddr *addr;
|
|
{
|
|
register struct interface *ifp, *maybe;
|
|
register int af = addr->sa_family;
|
|
register int (*netmatch)();
|
|
|
|
if (af >= af_max)
|
|
return (0);
|
|
maybe = 0;
|
|
netmatch = afswitch[af].af_netmatch;
|
|
for (ifp = ifnet; ifp; ifp = ifp->int_next) {
|
|
if (ifp->int_addr.sa_family != af)
|
|
continue;
|
|
if (same(&ifp->int_addr, addr))
|
|
break;
|
|
if ((ifp->int_flags & IFF_BROADCAST) &&
|
|
same(&ifp->int_broadaddr, addr))
|
|
break;
|
|
if ((ifp->int_flags & IFF_POINTOPOINT) &&
|
|
same(&ifp->int_dstaddr, addr))
|
|
break;
|
|
if (maybe == 0 && (*netmatch)(addr, &ifp->int_addr))
|
|
maybe = ifp;
|
|
}
|
|
if (ifp == 0)
|
|
ifp = maybe;
|
|
return (ifp);
|
|
}
|