FreeBSD-5.3/usr.sbin/IPXrouted/startup.c
/*
* Copyright (c) 1985, 1993
* The Regents of the University of California. All rights reserved.
*
* Copyright (c) 1995 John Hay. 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.
*
* $FreeBSD: src/usr.sbin/IPXrouted/startup.c,v 1.11 2004/04/13 11:24:43 luigi Exp $
*/
#ifndef lint
static const char sccsid[] = "@(#)startup.c 8.1 (Berkeley) 6/5/93";
#endif /* not lint */
/*
* Routing Table Management Daemon
*/
#include "defs.h"
#include <sys/param.h>
#include <sys/ioctl.h>
#include <sys/sysctl.h>
#include <sys/time.h>
#include <net/if.h>
#include <net/if_dl.h>
#include <errno.h>
#include <nlist.h>
#include <search.h>
#include <stdlib.h>
struct interface *ifnet;
int lookforinterfaces = 1;
int performnlist = 1;
int gateway = 0;
int externalinterfaces = 0; /* # of remote and local interfaces */
void
quit(s)
char *s;
{
int sverrno = errno;
(void) fprintf(stderr, "IPXroute: ");
if (s)
(void) fprintf(stderr, "%s: ", s);
(void) fprintf(stderr, "%s\n", strerror(sverrno));
exit(1);
/* NOTREACHED */
}
struct rt_addrinfo info;
/* XXX Sleazy use of local variables throughout file, warning!!!! */
#define netmask info.rti_info[RTAX_NETMASK]
#define ifaaddr info.rti_info[RTAX_IFA]
#define brdaddr info.rti_info[RTAX_BRD]
void
rt_xaddrs(cp, cplim, rtinfo)
register caddr_t cp, cplim;
register struct rt_addrinfo *rtinfo;
{
register struct sockaddr *sa;
register int i;
bzero(rtinfo->rti_info, sizeof(rtinfo->rti_info));
for (i = 0; (i < RTAX_MAX) && (cp < cplim); i++) {
if ((rtinfo->rti_addrs & (1 << i)) == 0)
continue;
rtinfo->rti_info[i] = sa = (struct sockaddr *)cp;
cp += SA_SIZE(sa);
}
}
/*
* Find the network interfaces which have configured themselves.
* If the interface is present but not yet up (for example an
* ARPANET IMP), set the lookforinterfaces flag so we'll
* come back later and look again.
*/
void
ifinit(void)
{
struct interface ifs, *ifp;
size_t needed;
int mib[6], no_ipxaddr = 0, flags = 0;
char *buf, *cplim, *cp;
register struct if_msghdr *ifm;
register struct ifa_msghdr *ifam;
struct sockaddr_dl *sdl = 0;
mib[0] = CTL_NET;
mib[1] = PF_ROUTE;
mib[2] = 0;
mib[3] = AF_IPX;
mib[4] = NET_RT_IFLIST;
mib[5] = 0;
if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0)
quit("route-sysctl-estimate");
if ((buf = malloc(needed)) == NULL)
quit("malloc");
if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0)
lookforinterfaces = 0;
cplim = buf + needed;
for (cp = buf; cp < cplim; cp += ifm->ifm_msglen) {
ifm = (struct if_msghdr *)cp;
if (ifm->ifm_type == RTM_IFINFO) {
bzero(&ifs, sizeof(ifs));
ifs.int_flags = flags = ifm->ifm_flags | IFF_INTERFACE;
if ((flags & IFF_UP) == 0 || no_ipxaddr)
lookforinterfaces = 1;
sdl = (struct sockaddr_dl *) (ifm + 1);
sdl->sdl_data[sdl->sdl_nlen] = 0;
no_ipxaddr = 1;
continue;
}
if (ifm->ifm_type != RTM_NEWADDR)
quit("ifinit: out of sync");
if ((flags & IFF_UP) == 0)
continue;
ifam = (struct ifa_msghdr *)ifm;
info.rti_addrs = ifam->ifam_addrs;
rt_xaddrs((char *)(ifam + 1), cp + ifam->ifam_msglen, &info);
if (ifaaddr == 0) {
syslog(LOG_ERR, "%s: (get addr)", sdl->sdl_data);
continue;
}
ifs.int_addr = *ifaaddr;
if (ifs.int_addr.sa_family != AF_IPX)
continue;
no_ipxaddr = 0;
if (ifs.int_flags & IFF_POINTOPOINT) {
if (brdaddr == 0) {
syslog(LOG_ERR, "%s: (get dstaddr)",
sdl->sdl_data);
continue;
}
if (brdaddr->sa_family == AF_UNSPEC) {
lookforinterfaces = 1;
continue;
}
ifs.int_dstaddr = *brdaddr;
}
if (ifs.int_flags & IFF_BROADCAST) {
if (brdaddr == 0) {
syslog(LOG_ERR, "%s: (get broadaddr)",
sdl->sdl_data);
continue;
}
ifs.int_dstaddr = *brdaddr;
}
if (ifs.int_flags & IFF_LOOPBACK) {
ifs.int_dstaddr = ifs.int_addr;
}
/*
* already known to us?
* what makes a POINTOPOINT if unique is its dst addr,
* NOT its source address
*/
if ( ((ifs.int_flags & IFF_POINTOPOINT) &&
if_ifwithdstaddr(&ifs.int_dstaddr)) ||
( ((ifs.int_flags & IFF_POINTOPOINT) == 0) &&
if_ifwithaddr(&ifs.int_addr)))
continue;
ifp = (struct interface *)
malloc(sdl->sdl_nlen + 1 + sizeof(ifs));
if (ifp == 0) {
syslog(LOG_ERR, "IPXrouted: out of memory\n");
lookforinterfaces = 1;
break;
}
*ifp = ifs;
/*
* Count the # of directly connected networks
* and point to point links which aren't looped
* back to ourself. This is used below to
* decide if we should be a routing ``supplier''.
*/
if ((ifs.int_flags & IFF_POINTOPOINT) == 0 ||
if_ifwithaddr(&ifs.int_dstaddr) == 0)
externalinterfaces++;
/*
* If we have a point-to-point link, we want to act
* as a supplier even if it's our only interface,
* as that's the only way our peer on the other end
* can tell that the link is up.
*/
if ((ifs.int_flags & IFF_POINTOPOINT) && supplier < 0)
supplier = 1;
ifp->int_name = (char *)(ifp + 1);
strcpy(ifp->int_name, sdl->sdl_data);
ifp->int_metric = ifam->ifam_metric;
ifp->int_next = ifnet;
ifnet = ifp;
traceinit(ifp);
addrouteforif(ifp);
}
if (externalinterfaces > 1 && supplier < 0)
supplier = 1;
free(buf);
}
void
addrouteforif(ifp)
struct interface *ifp;
{
struct sockaddr_ipx net;
struct sockaddr *dst;
struct rt_entry *rt;
if (ifp->int_flags & IFF_POINTOPOINT) {
int (*match)();
register struct interface *ifp2 = ifnet;
dst = &ifp->int_dstaddr;
/* Search for interfaces with the same net */
ifp->int_sq.n = ifp->int_sq.p = &(ifp->int_sq);
match = afswitch[dst->sa_family].af_netmatch;
if (match)
for (ifp2 = ifnet; ifp2; ifp2 =ifp2->int_next) {
if ((ifp->int_flags & IFF_POINTOPOINT) == 0)
continue;
if ((*match)(&ifp2->int_dstaddr,&ifp->int_dstaddr)) {
insque(&ifp2->int_sq,&ifp->int_sq);
break;
}
}
} else {
bzero(&net, sizeof(net));
net.sipx_family = AF_IPX;
net.sipx_len = sizeof (net);
net.sipx_addr.x_net = satoipx_addr(ifp->int_broadaddr).x_net;
dst = (struct sockaddr *)&net;
}
rt = rtlookup(dst);
if (rt)
rtdelete(rt);
if (tracing)
fprintf(stderr, "Adding route to interface %s\n", ifp->int_name);
if (ifp->int_transitions++ > 0)
syslog(LOG_ERR, "re-installing interface %s", ifp->int_name);
rtadd(dst, &ifp->int_addr, ifp->int_metric, 0,
ifp->int_flags & (IFF_INTERFACE|IFF_PASSIVE|IFF_REMOTE));
}