282 lines
8.1 KiB
C
282 lines
8.1 KiB
C
/*
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* Copyright (c) 1985, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Copyright (c) 1995 John Hay. All rights reserved.
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*
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* This file includes significant work done at Cornell University by
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* Bill Nesheim. That work included by permission.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $Id: startup.c,v 1.6 1997/02/22 16:01:01 peter Exp $
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*/
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#ifndef lint
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static char sccsid[] = "@(#)startup.c 8.1 (Berkeley) 6/5/93";
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#endif /* not lint */
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/*
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* Routing Table Management Daemon
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*/
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#include "defs.h"
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#include <sys/param.h>
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#include <sys/ioctl.h>
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#include <sys/sysctl.h>
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#include <sys/time.h>
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#include <net/if.h>
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#include <net/if_dl.h>
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#include <nlist.h>
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#include <stdlib.h>
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struct interface *ifnet;
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int lookforinterfaces = 1;
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int performnlist = 1;
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int gateway = 0;
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int externalinterfaces = 0; /* # of remote and local interfaces */
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void
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quit(s)
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char *s;
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{
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extern int errno;
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int sverrno = errno;
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(void) fprintf(stderr, "IPXroute: ");
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if (s)
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(void) fprintf(stderr, "%s: ", s);
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(void) fprintf(stderr, "%s\n", strerror(sverrno));
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exit(1);
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/* NOTREACHED */
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}
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struct rt_addrinfo info;
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/* Sleazy use of local variables throughout file, warning!!!! */
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#define netmask info.rti_info[RTAX_NETMASK]
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#define ifaaddr info.rti_info[RTAX_IFA]
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#define brdaddr info.rti_info[RTAX_BRD]
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#define ROUNDUP(a) \
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((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long))
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#define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len))
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void
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rt_xaddrs(cp, cplim, rtinfo)
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register caddr_t cp, cplim;
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register struct rt_addrinfo *rtinfo;
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{
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register struct sockaddr *sa;
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register int i;
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bzero(rtinfo->rti_info, sizeof(rtinfo->rti_info));
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for (i = 0; (i < RTAX_MAX) && (cp < cplim); i++) {
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if ((rtinfo->rti_addrs & (1 << i)) == 0)
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continue;
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rtinfo->rti_info[i] = sa = (struct sockaddr *)cp;
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ADVANCE(cp, sa);
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}
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}
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/*
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* Find the network interfaces which have configured themselves.
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* If the interface is present but not yet up (for example an
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* ARPANET IMP), set the lookforinterfaces flag so we'll
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* come back later and look again.
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*/
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void
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ifinit(void)
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{
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struct interface ifs, *ifp;
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size_t needed;
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int mib[6], no_ipxaddr = 0, flags = 0;
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char *buf, *cplim, *cp;
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register struct if_msghdr *ifm;
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register struct ifa_msghdr *ifam;
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struct sockaddr_dl *sdl = 0;
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mib[0] = CTL_NET;
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mib[1] = PF_ROUTE;
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mib[2] = 0;
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mib[3] = AF_IPX;
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mib[4] = NET_RT_IFLIST;
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mib[5] = 0;
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if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0)
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quit("route-sysctl-estimate");
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if ((buf = malloc(needed)) == NULL)
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quit("malloc");
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if (sysctl(mib, 6, buf, &needed, NULL, 0) < 0)
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lookforinterfaces = 0;
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cplim = buf + needed;
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for (cp = buf; cp < cplim; cp += ifm->ifm_msglen) {
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ifm = (struct if_msghdr *)cp;
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if (ifm->ifm_type == RTM_IFINFO) {
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bzero(&ifs, sizeof(ifs));
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ifs.int_flags = flags = ifm->ifm_flags | IFF_INTERFACE;
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if ((flags & IFF_UP) == 0 || no_ipxaddr)
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lookforinterfaces = 1;
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sdl = (struct sockaddr_dl *) (ifm + 1);
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sdl->sdl_data[sdl->sdl_nlen] = 0;
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no_ipxaddr = 1;
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continue;
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}
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if (ifm->ifm_type != RTM_NEWADDR)
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quit("ifinit: out of sync");
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if ((flags & IFF_UP) == 0)
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continue;
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ifam = (struct ifa_msghdr *)ifm;
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info.rti_addrs = ifam->ifam_addrs;
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rt_xaddrs((char *)(ifam + 1), cp + ifam->ifam_msglen, &info);
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if (ifaaddr == 0) {
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syslog(LOG_ERR, "%s: (get addr)", sdl->sdl_data);
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continue;
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}
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ifs.int_addr = *ifaaddr;
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if (ifs.int_addr.sa_family != AF_IPX)
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continue;
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no_ipxaddr = 0;
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if (ifs.int_flags & IFF_POINTOPOINT) {
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if (brdaddr == 0) {
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syslog(LOG_ERR, "%s: (get dstaddr)",
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sdl->sdl_data);
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continue;
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}
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if (brdaddr->sa_family == AF_UNSPEC) {
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lookforinterfaces = 1;
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continue;
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}
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ifs.int_dstaddr = *brdaddr;
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}
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if (ifs.int_flags & IFF_BROADCAST) {
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if (brdaddr == 0) {
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syslog(LOG_ERR, "%s: (get broadaddr)",
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sdl->sdl_data);
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continue;
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}
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ifs.int_dstaddr = *brdaddr;
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}
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if (ifs.int_flags & IFF_LOOPBACK) {
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ifs.int_dstaddr = ifs.int_addr;
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}
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/*
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* already known to us?
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* what makes a POINTOPOINT if unique is its dst addr,
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* NOT its source address
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*/
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if ( ((ifs.int_flags & IFF_POINTOPOINT) &&
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if_ifwithdstaddr(&ifs.int_dstaddr)) ||
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( ((ifs.int_flags & IFF_POINTOPOINT) == 0) &&
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if_ifwithaddr(&ifs.int_addr)))
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continue;
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ifp = (struct interface *)
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malloc(sdl->sdl_nlen + 1 + sizeof(ifs));
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if (ifp == 0) {
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syslog(LOG_ERR, "IPXrouted: out of memory\n");
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lookforinterfaces = 1;
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break;
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}
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*ifp = ifs;
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/*
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* Count the # of directly connected networks
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* and point to point links which aren't looped
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* back to ourself. This is used below to
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* decide if we should be a routing ``supplier''.
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*/
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if ((ifs.int_flags & IFF_POINTOPOINT) == 0 ||
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if_ifwithaddr(&ifs.int_dstaddr) == 0)
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externalinterfaces++;
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/*
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* If we have a point-to-point link, we want to act
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* as a supplier even if it's our only interface,
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* as that's the only way our peer on the other end
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* can tell that the link is up.
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*/
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if ((ifs.int_flags & IFF_POINTOPOINT) && supplier < 0)
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supplier = 1;
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ifp->int_name = (char *)(ifp + 1);
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strcpy(ifp->int_name, sdl->sdl_data);
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ifp->int_metric = ifam->ifam_metric;
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ifp->int_next = ifnet;
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ifnet = ifp;
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traceinit(ifp);
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addrouteforif(ifp);
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}
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if (externalinterfaces > 1 && supplier < 0)
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supplier = 1;
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free(buf);
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}
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void
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addrouteforif(ifp)
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struct interface *ifp;
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{
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struct sockaddr_ipx net;
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struct sockaddr *dst;
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struct rt_entry *rt;
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if (ifp->int_flags & IFF_POINTOPOINT) {
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int (*match)();
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register struct interface *ifp2 = ifnet;
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dst = &ifp->int_dstaddr;
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/* Search for interfaces with the same net */
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ifp->int_sq.n = ifp->int_sq.p = &(ifp->int_sq);
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match = afswitch[dst->sa_family].af_netmatch;
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if (match)
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for (ifp2 = ifnet; ifp2; ifp2 =ifp2->int_next) {
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if (ifp->int_flags & IFF_POINTOPOINT == 0)
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continue;
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if ((*match)(&ifp2->int_dstaddr,&ifp->int_dstaddr)) {
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insque(&ifp2->int_sq,&ifp->int_sq);
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break;
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}
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}
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} else {
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bzero(&net, sizeof(net));
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net.sipx_family = AF_IPX;
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net.sipx_len = sizeof (net);
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net.sipx_addr.x_net = satoipx_addr(ifp->int_broadaddr).x_net;
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dst = (struct sockaddr *)&net;
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}
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rt = rtlookup(dst);
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if (rt)
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rtdelete(rt);
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if (tracing)
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fprintf(stderr, "Adding route to interface %s\n", ifp->int_name);
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if (ifp->int_transitions++ > 0)
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syslog(LOG_ERR, "re-installing interface %s", ifp->int_name);
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rtadd(dst, &ifp->int_addr, ifp->int_metric, 0,
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ifp->int_flags & (IFF_INTERFACE|IFF_PASSIVE|IFF_REMOTE));
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}
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