diff options
Diffstat (limited to 'sbin/routed/startup.c')
| -rw-r--r-- | sbin/routed/startup.c | 531 |
1 files changed, 0 insertions, 531 deletions
diff --git a/sbin/routed/startup.c b/sbin/routed/startup.c deleted file mode 100644 index 4129ec4355c..00000000000 --- a/sbin/routed/startup.c +++ /dev/null @@ -1,531 +0,0 @@ -/* $OpenBSD: startup.c,v 1.2 1996/06/23 14:32:31 deraadt Exp $ */ -/* $NetBSD: startup.c,v 1.14 1995/06/20 22:27:56 christos Exp $ */ - -/* - * Copyright (c) 1983, 1988, 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 -#if 0 -static char sccsid[] = "@(#)startup.c 8.1 (Berkeley) 6/5/93"; -#else -/*###40 [cc] warning: `rcsid' defined but not used%%%*/ -static char rcsid[] = "$OpenBSD: startup.c,v 1.2 1996/06/23 14:32:31 deraadt Exp $"; -#endif -#endif /* not lint */ - -/* - * Routing Table Management Daemon - */ -#include "defs.h" -#include <sys/ioctl.h> -#include <sys/sysctl.h> -#include <net/if.h> -#include <net/if_dl.h> -#include <syslog.h> -#include "pathnames.h" - -struct interface *ifnet; -struct interface **ifnext = &ifnet; -int lookforinterfaces = 1; -int externalinterfaces = 0; /* # of remote and local interfaces */ -int foundloopback; /* valid flag for loopaddr */ -struct sockaddr loopaddr; /* our address on loopback */ - -void add_ptopt_localrt __P((struct interface *)); -int getnetorhostname __P((char *, char *, struct sockaddr_in *)); -int gethostnameornumber __P((char *, struct sockaddr_in *)); - -void -quit(s) - char *s; -{ - extern int errno; - int sverrno = errno; - - (void) fprintf(stderr, "route: "); - if (s) - (void) fprintf(stderr, "%s: ", s); - (void) fprintf(stderr, "%s\n", strerror(sverrno)); - exit(1); - /* NOTREACHED */ -} - -struct rt_addrinfo info; -/* 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] - -#define ROUNDUP(a) \ - ((a) > 0 ? (1 + (((a) - 1) | (sizeof(long) - 1))) : sizeof(long)) -#define ADVANCE(x, n) (x += ROUNDUP((n)->sa_len)) - -void -rt_xaddrs(cp, cplim, rtinfo) - register caddr_t cp, cplim; - register struct rt_addrinfo *rtinfo; -{ - register struct sockaddr *sa; - register int i; - - memset(rtinfo->rti_info, 0, 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; - ADVANCE(cp, 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() -{ - struct interface ifs, *ifp; - size_t needed; - int mib[6], no_ipaddr = 0, flags = 0; - char *buf, *cplim, *cp; - register struct if_msghdr *ifm; - register struct ifa_msghdr *ifam; - struct sockaddr_dl *sdl = NULL; - struct sockaddr_in *sin; - u_long i; - - mib[0] = CTL_NET; - mib[1] = PF_ROUTE; - mib[2] = 0; - mib[3] = AF_INET; - 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) - quit("actual retrieval of interface table"); - 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) { - memset(&ifs, 0, sizeof(ifs)); - ifs.int_flags = flags = (0xffff & ifm->ifm_flags) | IFF_INTERFACE; - if ((flags & IFF_UP) == 0 || no_ipaddr) - lookforinterfaces = 1; - sdl = (struct sockaddr_dl *) (ifm + 1); - sdl->sdl_data[sdl->sdl_nlen] = 0; - no_ipaddr = 1; - continue; - } - if (ifm->ifm_type != RTM_NEWADDR) - quit("ifinit: out of sync"); - if ((flags & IFF_UP) == 0) { - lookforinterfaces = 1; - 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_INET) - continue; - no_ipaddr = 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; - } - /* - * already known to us? - * This allows multiple point-to-point links - * to share a source address (possibly with one - * other link), but assumes that there will not be - * multiple links with the same destination address. - */ - if (ifs.int_flags & IFF_POINTOPOINT) { - if (if_ifwithdstaddr(&ifs.int_dstaddr)) - continue; - } else if (if_ifwithaddr(&ifs.int_addr)) - continue; - if (ifs.int_flags & IFF_LOOPBACK) { - ifs.int_flags |= IFF_PASSIVE; - foundloopback = 1; - loopaddr = ifs.int_addr; - for (ifp = ifnet; ifp; ifp = ifp->int_next) - if (ifp->int_flags & IFF_POINTOPOINT) - add_ptopt_localrt(ifp); - } - if (ifs.int_flags & IFF_BROADCAST) { - if (brdaddr == 0) { - syslog(LOG_ERR, "%s: (get broadaddr)", - sdl->sdl_data); - continue; - } - ifs.int_dstaddr = *brdaddr; - } - /* - * Use a minimum metric of one; - * treat the interface metric (default 0) - * as an increment to the hop count of one. - */ - ifs.int_metric = ifam->ifam_metric + 1; - if (netmask == 0) { - syslog(LOG_ERR, "%s: (get netmask)", - sdl->sdl_data); - continue; - } - sin = (struct sockaddr_in *)netmask; - ifs.int_subnetmask = ntohl(sin->sin_addr.s_addr); - sin = (struct sockaddr_in *)&ifs.int_addr; - i = ntohl(sin->sin_addr.s_addr); - if (IN_CLASSA(i)) - ifs.int_netmask = IN_CLASSA_NET; - else if (IN_CLASSB(i)) - ifs.int_netmask = IN_CLASSB_NET; - else - ifs.int_netmask = IN_CLASSC_NET; - ifs.int_net = i & ifs.int_netmask; - ifs.int_subnet = i & ifs.int_subnetmask; - if (ifs.int_subnetmask != ifs.int_netmask) - ifs.int_flags |= IFF_SUBNET; - ifp = (struct interface *) - malloc(sdl->sdl_nlen + 1 + sizeof(ifs)); - if (ifp == 0) { - printf("routed: 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_LOOPBACK) == 0 && - ((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); - *ifnext = ifp; - ifnext = &ifp->int_next; - traceinit(ifp); - addrouteforif(ifp); - } - if (externalinterfaces > 1 && supplier < 0) - supplier = 1; - free(buf); -} - -/* - * Add route for interface if not currently installed. - * Create route to other end if a point-to-point link, - * otherwise a route to this (sub)network. - * INTERNET SPECIFIC. - */ -void -addrouteforif(ifp) - register struct interface *ifp; -{ - struct sockaddr_in net; - struct sockaddr *dst; - int state; - register struct rt_entry *rt; - struct sockaddr mask; - - memset(&mask, 0, sizeof(mask)); - if (ifp->int_flags & IFF_POINTOPOINT) - dst = &ifp->int_dstaddr; - else { - memset(&net, 0, sizeof (net)); - net.sin_family = AF_INET; - net.sin_addr = inet_makeaddr(ifp->int_subnet, INADDR_ANY); - dst = (struct sockaddr *)&net; - } - rt = rtfind(dst); - if (rt && - (rt->rt_state & (RTS_INTERFACE | RTS_INTERNAL)) == RTS_INTERFACE) - return; - if (rt) - rtdelete(rt); - /* - * If interface on subnetted network, - * install route to network as well. - * This is meant for external viewers. - */ - if ((ifp->int_flags & (IFF_SUBNET|IFF_POINTOPOINT)) == IFF_SUBNET) { - struct in_addr subnet; - - subnet = net.sin_addr; - net.sin_addr = inet_makeaddr(ifp->int_net, INADDR_ANY); - rt = rtfind(dst); - if (rt == 0) - rtadd(dst, &ifp->int_addr, &mask, ifp->int_metric, - ((ifp->int_flags & (IFF_INTERFACE|IFF_REMOTE)) | - RTS_PASSIVE | RTS_INTERNAL | RTS_SUBNET)); - else if ((rt->rt_state & (RTS_INTERNAL|RTS_SUBNET)) == - (RTS_INTERNAL|RTS_SUBNET) && - ifp->int_metric < rt->rt_metric) - rtchange(rt, &rt->rt_router, &mask, ifp->int_metric); - net.sin_addr = subnet; - } - if (ifp->int_transitions++ > 0) - syslog(LOG_ERR, "re-installing interface %s", ifp->int_name); - state = ifp->int_flags & - (IFF_INTERFACE | IFF_PASSIVE | IFF_REMOTE | IFF_SUBNET); - if (ifp->int_flags & IFF_POINTOPOINT && - (ntohl(((struct sockaddr_in *)&ifp->int_dstaddr)->sin_addr.s_addr) & - ifp->int_netmask) != ifp->int_net) - state &= ~RTS_SUBNET; - if (ifp->int_flags & IFF_LOOPBACK) - state |= RTS_EXTERNAL; - rtadd(dst, &ifp->int_addr, &mask, ifp->int_metric, state); - if (ifp->int_flags & IFF_POINTOPOINT && foundloopback) - add_ptopt_localrt(ifp); -} - -/* - * Add route to local end of point-to-point using loopback. - * If a route to this network is being sent to neighbors on other nets, - * mark this route as subnet so we don't have to propagate it too. - */ -void -add_ptopt_localrt(ifp) - register struct interface *ifp; -{ - struct rt_entry *rt; - struct sockaddr *dst; - struct sockaddr_in net; - int state; - struct sockaddr mask; - - memset(&mask, 0, sizeof(mask)); - state = RTS_INTERFACE | RTS_PASSIVE; - - /* look for route to logical network */ - memset(&net, 0, sizeof (net)); - net.sin_family = AF_INET; - net.sin_addr = inet_makeaddr(ifp->int_net, INADDR_ANY); - dst = (struct sockaddr *)&net; - rt = rtfind(dst); - if (rt && rt->rt_state & RTS_INTERNAL) - state |= RTS_SUBNET; - - dst = &ifp->int_addr; - if ((rt = rtfind(dst)) != NULL) { - if (rt && rt->rt_state & RTS_INTERFACE) - return; - rtdelete(rt); - } - rtadd(dst, &loopaddr, &mask, 1, state); -} - -/* - * As a concession to the ARPANET we read a list of gateways - * from /etc/gateways and add them to our tables. This file - * exists at each ARPANET gateway and indicates a set of ``remote'' - * gateways (i.e. a gateway which we can't immediately determine - * if it's present or not as we can do for those directly connected - * at the hardware level). If a gateway is marked ``passive'' - * in the file, then we assume it doesn't have a routing process - * of our design and simply assume it's always present. Those - * not marked passive are treated as if they were directly - * connected -- they're added into the interface list so we'll - * send them routing updates. - * - * PASSIVE ENTRIES AREN'T NEEDED OR USED ON GATEWAYS RUNNING EGP. - */ -void -gwkludge() -{ - struct sockaddr_in dst, gate; - FILE *fp; - char *type, *dname, *gname, *qual, buf[BUFSIZ]; - struct interface *ifp; - int metric, n; - struct rt_entry route; - struct sockaddr mask; - memset(&mask, 0, sizeof(mask)); - - - fp = fopen(_PATH_GATEWAYS, "r"); - if (fp == NULL) - return; - qual = buf; - dname = buf + 64; - gname = buf + ((BUFSIZ - 64) / 3); - type = buf + (((BUFSIZ - 64) * 2) / 3); - memset(&dst, 0, sizeof (dst)); - memset(&gate, 0, sizeof (gate)); - memset(&route, 0, sizeof(route)); -/* format: {net | host} XX gateway XX metric DD [passive | external]\n */ -#define readentry(fp) \ - fscanf((fp), "%s %s gateway %s metric %d %s\n", \ - type, dname, gname, &metric, qual) - for (;;) { - if ((n = readentry(fp)) == EOF) - break; - if (!getnetorhostname(type, dname, &dst)) - continue; - if (!gethostnameornumber(gname, &gate)) - continue; - if (metric == 0) /* XXX */ - metric = 1; - if (strcmp(qual, "passive") == 0) { - /* - * Passive entries aren't placed in our tables, - * only the kernel's, so we don't copy all of the - * external routing information within a net. - * Internal machines should use the default - * route to a suitable gateway (like us). - */ - route.rt_dst = *(struct sockaddr *) &dst; - route.rt_router = *(struct sockaddr *) &gate; - route.rt_flags = RTF_UP; - if (strcmp(type, "host") == 0) - route.rt_flags |= RTF_HOST; - if (metric) - route.rt_flags |= RTF_GATEWAY; - (void) rtioctl(ADD, &route.rt_rt); - continue; - } - if (strcmp(qual, "external") == 0) { - /* - * Entries marked external are handled - * by other means, e.g. EGP, - * and are placed in our tables only - * to prevent overriding them - * with something else. - */ - rtadd((struct sockaddr *)&dst, - (struct sockaddr *)&gate, &mask, metric, - RTS_EXTERNAL|RTS_PASSIVE); - continue; - } - /* assume no duplicate entries */ - externalinterfaces++; - ifp = (struct interface *)malloc(sizeof (*ifp)); - memset(ifp, 0, sizeof (*ifp)); - ifp->int_flags = IFF_REMOTE; - /* can't identify broadcast capability */ - ifp->int_net = inet_netof_subnet(dst.sin_addr); - if (strcmp(type, "host") == 0) { - ifp->int_flags |= IFF_POINTOPOINT; - ifp->int_dstaddr = *((struct sockaddr *)&dst); - } - ifp->int_addr = *((struct sockaddr *)&gate); - ifp->int_metric = metric; - ifp->int_next = ifnet; - ifnet = ifp; - addrouteforif(ifp); - } - fclose(fp); -} - -int -getnetorhostname(type, name, sin) - char *type, *name; - struct sockaddr_in *sin; -{ - - if (strcmp(type, "net") == 0) { - struct netent *np = getnetbyname(name); - int n; - - if (np == 0) - n = inet_network(name); - else { - if (np->n_addrtype != AF_INET) - return (0); - n = np->n_net; - /* - * getnetbyname returns right-adjusted value. - */ - if (n < 128) - n <<= IN_CLASSA_NSHIFT; - else if (n < 65536) - n <<= IN_CLASSB_NSHIFT; - else - n <<= IN_CLASSC_NSHIFT; - } - sin->sin_family = AF_INET; - sin->sin_addr = inet_makeaddr(n, INADDR_ANY); - return (1); - } - if (strcmp(type, "host") == 0) - return (gethostnameornumber(name, sin)); - return (0); -} - -int -gethostnameornumber(name, sin) - char *name; - struct sockaddr_in *sin; -{ - struct hostent *hp; - - if (inet_aton(name, &sin->sin_addr) == 0) { - hp = gethostbyname(name); - if (hp == 0) - return (0); - memcpy(&sin->sin_addr, hp->h_addr, hp->h_length); - sin->sin_family = hp->h_addrtype; - } else - sin->sin_family = AF_INET; - return (1); -} |