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/*
* Copyright (c) 1985, 1993
* The Regents of the University of California. All rights reserved.
*
* This file includes significant work done at Cornell University by
* Bill Nesheim. That work included by permission.
*
* 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[] = "@(#)af.c 8.1 (Berkeley) 6/5/93";
#endif /* not lint */
#include "defs.h"
/*
* Address family support routines
*/
int null_hash(), null_netmatch(), null_output(),
null_portmatch(), null_portcheck(),
null_checkhost(), null_ishost(), null_canon();
int xnnet_hash(), xnnet_netmatch(), xnnet_output(),
xnnet_portmatch(),
xnnet_checkhost(), xnnet_ishost(), xnnet_canon();
#define NIL \
{ null_hash, null_netmatch, null_output, \
null_portmatch, null_portcheck, null_checkhost, \
null_ishost, null_canon }
#define XNSNET \
{ xnnet_hash, xnnet_netmatch, xnnet_output, \
xnnet_portmatch, xnnet_portmatch, xnnet_checkhost, \
xnnet_ishost, xnnet_canon }
struct afswitch afswitch[AF_MAX] =
{ NIL, NIL, NIL, NIL, NIL, NIL, XNSNET, NIL, NIL, NIL, NIL };
struct sockaddr_ns xnnet_default = { sizeof(struct sockaddr_ns), AF_NS };
union ns_net ns_anynet;
union ns_net ns_zeronet;
xnnet_hash(sns, hp)
register struct sockaddr_ns *sns;
struct afhash *hp;
{
register long hash = 0;
register u_short *s = sns->sns_addr.x_host.s_host;
union ns_net_u net;
net.net_e = sns->sns_addr.x_net;
hp->afh_nethash = net.long_e;
hash = *s++; hash <<= 8; hash += *s++; hash <<= 8; hash += *s;
hp->afh_hosthash = hash;
}
xnnet_netmatch(sxn1, sxn2)
struct sockaddr_ns *sxn1, *sxn2;
{
return (ns_neteq(sxn1->sns_addr, sxn2->sns_addr));
}
/*
* Verify the message is from the right port.
*/
xnnet_portmatch(sns)
register struct sockaddr_ns *sns;
{
return (ntohs(sns->sns_addr.x_port) == IDPPORT_RIF );
}
/*
* xns output routine.
*/
#ifdef DEBUG
int do_output = 0;
#endif
xnnet_output(flags, sns, size)
int flags;
struct sockaddr_ns *sns;
int size;
{
struct sockaddr_ns dst;
dst = *sns;
sns = &dst;
if (sns->sns_addr.x_port == 0)
sns->sns_addr.x_port = htons(IDPPORT_RIF);
#ifdef DEBUG
if(do_output || ntohs(msg->rip_cmd) == RIPCMD_REQUEST)
#endif
/*
* Kludge to allow us to get routes out to machines that
* don't know their addresses yet; send to that address on
* ALL connected nets
*/
if (ns_neteqnn(sns->sns_addr.x_net, ns_zeronet)) {
extern struct interface *ifnet;
register struct interface *ifp;
for (ifp = ifnet; ifp; ifp = ifp->int_next) {
sns->sns_addr.x_net =
satons_addr(ifp->int_addr).x_net;
(void) sendto(s, msg, size, flags,
(struct sockaddr *)sns, sizeof (*sns));
}
return;
}
(void) sendto(s, msg, size, flags,
(struct sockaddr *)sns, sizeof (*sns));
}
/*
* Return 1 if we want this route.
* We use this to disallow route net G entries for one for multiple
* point to point links.
*/
xnnet_checkhost(sns)
struct sockaddr_ns *sns;
{
register struct interface *ifp = if_ifwithnet(sns);
/*
* We want this route if there is no more than one
* point to point interface with this network.
*/
if (ifp == 0 || (ifp->int_flags & IFF_POINTOPOINT)==0) return (1);
return (ifp->int_sq.n == ifp->int_sq.p);
}
/*
* Return 1 if the address is
* for a host, 0 for a network.
*/
xnnet_ishost(sns)
struct sockaddr_ns *sns;
{
register u_short *s = sns->sns_addr.x_host.s_host;
if ((s[0]==0xffff) && (s[1]==0xffff) && (s[2]==0xffff))
return (0);
else
return (1);
}
xnnet_canon(sns)
struct sockaddr_ns *sns;
{
sns->sns_addr.x_port = 0;
}
/*ARGSUSED*/
null_hash(addr, hp)
struct sockaddr *addr;
struct afhash *hp;
{
hp->afh_nethash = hp->afh_hosthash = 0;
}
/*ARGSUSED*/
null_netmatch(a1, a2)
struct sockaddr *a1, *a2;
{
return (0);
}
/*ARGSUSED*/
null_output(s, f, a1, n)
int s, f;
struct sockaddr *a1;
int n;
{
;
}
/*ARGSUSED*/
null_portmatch(a1)
struct sockaddr *a1;
{
return (0);
}
/*ARGSUSED*/
null_portcheck(a1)
struct sockaddr *a1;
{
return (0);
}
/*ARGSUSED*/
null_ishost(a1)
struct sockaddr *a1;
{
return (0);
}
/*ARGSUSED*/
null_checkhost(a1)
struct sockaddr *a1;
{
return (0);
}
/*ARGSUSED*/
null_canon(a1)
struct sockaddr *a1;
{
;
}
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