381 lines
8.5 KiB
C
381 lines
8.5 KiB
C
/*
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* Copyright (c) 1983 Regents of the University of California.
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* All rights reserved. The Berkeley software License Agreement
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* specifies the terms and conditions for redistribution.
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*/
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#ifndef lint
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static char sccsid[] = "@(#)route.c 1.1 94/10/31 SMI"; /* from UCB 5.6 86/04/23 */
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#endif
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#include <sys/param.h>
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#include <sys/socket.h>
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#include <sys/mbuf.h>
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#include <net/if.h>
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#include <net/route.h>
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#include <netinet/in.h>
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#ifdef ENABLE_XNS
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#include <netns/ns.h>
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#endif ENABLE_XNS
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#include <netdb.h>
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extern int kread();
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extern int nflag;
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extern char *routename(), *netname(), *inet_ntoa();
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#ifdef ENABLE_XNS
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extern char *ns_print();
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#endif ENABLE_XNS
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/*
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* Definitions for showing gateway flags.
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*/
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struct bits {
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short b_mask;
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char b_val;
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} bits[] = {
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{ RTF_UP, 'U' },
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{ RTF_GATEWAY, 'G' },
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{ RTF_HOST, 'H' },
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{ RTF_DYNAMIC, 'D' },
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{ 0 }
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};
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/*
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* Print routing tables.
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*/
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routepr(hostaddr, netaddr, hashsizeaddr)
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off_t hostaddr, netaddr, hashsizeaddr;
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{
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struct mbuf mb;
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register struct rtentry *rt;
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register struct mbuf *m;
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register struct bits *p;
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char name[16], *flags;
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struct mbuf **routehash;
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struct ifnet ifnet;
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int hashsize;
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int i, doinghost = 1;
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if (hostaddr == 0) {
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printf("rthost: symbol not in namelist\n");
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return;
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}
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if (netaddr == 0) {
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printf("rtnet: symbol not in namelist\n");
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return;
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}
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if (hashsizeaddr == 0) {
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printf("rthashsize: symbol not in namelist\n");
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return;
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}
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kread(hashsizeaddr, &hashsize, sizeof (hashsize));
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routehash = (struct mbuf **)malloc( hashsize*sizeof (struct mbuf *) );
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kread(hostaddr, routehash, hashsize*sizeof (struct mbuf *));
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printf("Routing tables\n");
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printf("%-20.20s %-20.20s %-8.8s %-6.6s %-10.10s %s\n",
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"Destination", "Gateway",
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"Flags", "Refcnt", "Use", "Interface");
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again:
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for (i = 0; i < hashsize; i++) {
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if (routehash[i] == 0)
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continue;
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m = routehash[i];
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while (m) {
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struct sockaddr_in *sin;
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kread(m, &mb, sizeof (mb));
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rt = mtod(&mb, struct rtentry *);
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if ((unsigned)rt < (unsigned)&mb ||
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(unsigned)rt >= (unsigned)(&mb + 1)) {
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printf("???\n");
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return;
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}
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switch(rt->rt_dst.sa_family) {
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case AF_INET:
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sin = (struct sockaddr_in *)&rt->rt_dst;
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printf("%-20.20s ",
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(sin->sin_addr.s_addr == 0) ? "default" :
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(rt->rt_flags & RTF_HOST) ?
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routename(sin->sin_addr) :
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netname(sin->sin_addr.s_addr, 0));
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sin = (struct sockaddr_in *)&rt->rt_gateway;
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printf("%-20.20s ", routename(sin->sin_addr));
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break;
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#ifdef ENABLE_XNS
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case AF_NS:
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printf("%-20s ",
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ns_print((struct sockaddr_ns *)&rt->rt_dst));
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printf("%-20s ",
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ns_print((struct sockaddr_ns *)&rt->rt_gateway));
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break;
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#endif ENABLE_XNS
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default: {
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u_short *s = (u_short *)rt->rt_dst.sa_data;
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printf("(%d)%x %x %x %x %x %x %x ",
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rt->rt_dst.sa_family,
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s[0], s[1], s[2], s[3], s[4], s[5], s[6]);
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s = (u_short *)rt->rt_gateway.sa_data;
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printf("(%d)%x %x %x %x %x %x %x ",
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rt->rt_gateway.sa_family,
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s[0], s[1], s[2], s[3], s[4], s[5], s[6]);
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}
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}
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for (flags = name, p = bits; p->b_mask; p++)
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if (p->b_mask & rt->rt_flags)
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*flags++ = p->b_val;
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*flags = '\0';
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printf("%-8.8s %-6d %-10d ", name,
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rt->rt_refcnt, rt->rt_use);
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if (rt->rt_ifp == 0) {
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putchar('\n');
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m = mb.m_next;
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continue;
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}
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kread(rt->rt_ifp, &ifnet, sizeof (ifnet));
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kread((int)ifnet.if_name, name, 16);
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printf("%s%d\n", name, ifnet.if_unit);
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m = mb.m_next;
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}
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}
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if (doinghost) {
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kread(netaddr, routehash, hashsize*sizeof (struct mbuf *));
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doinghost = 0;
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goto again;
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}
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free(routehash);
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}
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char *
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routename(in)
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struct in_addr in; /* in network order */
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{
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register char *cp;
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static char line[50];
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struct hostent *hp;
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static char domain[MAXHOSTNAMELEN + 1];
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static int first = 1;
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char *index();
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if (first) {
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/*
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* Record domain name for future reference. Check
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* first for the 4.3bsd convention of keeping it as
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* part of the hostname. Failing that, try extracting
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* it using the domainname system call.
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*/
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first = 0;
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if (gethostname(domain, MAXHOSTNAMELEN) == 0 &&
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(cp = index(domain, '.')))
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(void) strcpy(domain, cp + 1);
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else if (getdomainname(domain, MAXHOSTNAMELEN) < 0)
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domain[0] = 0;
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}
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cp = 0;
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if (!nflag) {
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hp = gethostbyaddr(&in, sizeof (struct in_addr),
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AF_INET);
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if (hp) {
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/*
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* If the hostname contains a domain part,
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* and it's the same as the local domain,
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* elide it.
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*/
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if ((cp = index(hp->h_name, '.')) &&
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!strcmp(cp + 1, domain))
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*cp = 0;
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cp = hp->h_name;
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}
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}
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if (cp)
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strcpy(line, cp);
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else
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strcpy(line, inet_ntoa(in));
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return (line);
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}
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/*
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* Return the name of the network whose address is given.
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* The address is assumed to be that of a net or subnet, not a host.
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*/
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char *
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netname(iaddr, mask)
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u_long iaddr;
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u_long mask;
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{
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char *cp = 0;
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static char line[50];
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struct in_addr in;
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in.s_addr = ntohl(iaddr);
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if (!nflag && in.s_addr) {
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struct netent *np = 0;
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struct hostent *hp;
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u_long net;
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if (mask == 0) {
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register u_long i = in.s_addr;
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int subnetshift;
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if (IN_CLASSA(i)) {
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mask = IN_CLASSA_NET;
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subnetshift = 8;
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} else if (IN_CLASSB(i)) {
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mask = IN_CLASSB_NET;
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subnetshift = 8;
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} else {
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mask = IN_CLASSC_NET;
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subnetshift = 4;
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}
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/*
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* If there are more bits than the standard mask
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* would suggest, subnets must be in use.
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* Guess at the subnet mask, assuming reasonable
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* width subnet fields.
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*/
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while (in.s_addr &~ mask)
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mask = (long)mask >> subnetshift;
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}
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net = in.s_addr & mask;
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/*
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* Right-justify the network number.
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*
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* This is a throw-back to the old conventions used in the
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* kernel. We now store it left-justified in the kernel,
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* but still right-justified in the NIS maps for backward
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* compatibility.
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*/
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while ((mask & 1) == 0)
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mask >>= 1, net >>= 1;
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np = getnetbyaddr(net, AF_INET);
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if (np && np->n_net == net)
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cp = np->n_name;
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else {
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/*
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* gethostbyaddr takes network order; above
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* wanted host order.
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*/
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in.s_addr = iaddr;
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hp = gethostbyaddr(&in,sizeof(struct in_addr),AF_INET);
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if (hp)
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cp = hp->h_name;
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}
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}
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if (cp)
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strcpy(line, cp);
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else {
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in.s_addr = iaddr;
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strcpy(line, inet_ntoa(in));
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}
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return (line);
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}
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/*
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* Print routing statistics
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*/
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rt_stats(off)
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off_t off;
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{
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struct rtstat rtstat;
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if (off == 0) {
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printf("rtstat: symbol not in namelist\n");
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return;
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}
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kread(off, (char *)&rtstat, sizeof (rtstat));
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printf("routing:\n");
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printf("\t%d bad routing redirect%s\n",
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rtstat.rts_badredirect, plural(rtstat.rts_badredirect));
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printf("\t%d dynamically created route%s\n",
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rtstat.rts_dynamic, plural(rtstat.rts_dynamic));
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printf("\t%d new gateway%s due to redirects\n",
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rtstat.rts_newgateway, plural(rtstat.rts_newgateway));
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printf("\t%d destination%s found unreachable\n",
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rtstat.rts_unreach, plural(rtstat.rts_unreach));
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printf("\t%d use%s of a wildcard route\n",
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rtstat.rts_wildcard, plural(rtstat.rts_wildcard));
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}
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#ifdef ENABLE_XNS
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short ns_nullh[] = {0,0,0};
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short ns_bh[] = {-1,-1,-1};
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char *
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ns_print(sns)
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struct sockaddr_ns *sns;
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{
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struct ns_addr work;
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union { union ns_net net_e; u_long long_e; } net;
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u_short port;
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static char mybuf[50], cport[10], chost[25];
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char *host = "";
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register char *p; register u_char *q; u_char *q_lim;
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work = sns->sns_addr;
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port = ntohs(work.x_port);
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work.x_port = 0;
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net.net_e = work.x_net;
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if (ns_nullhost(work) && net.long_e == 0) {
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if (port ) {
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sprintf(mybuf, "*.%xH", port);
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upHex(mybuf);
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} else
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sprintf(mybuf, "*.*");
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return (mybuf);
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}
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if (bcmp(ns_bh, work.x_host.c_host, 6) == 0) {
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host = "any";
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} else if (bcmp(ns_nullh, work.x_host.c_host, 6) == 0) {
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host = "*";
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} else {
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q = work.x_host.c_host;
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sprintf(chost, "%02x%02x%02x%02x%02x%02xH",
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q[0], q[1], q[2], q[3], q[4], q[5]);
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for (p = chost; *p == '0' && p < chost + 12; p++);
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host = p;
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}
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if (port)
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sprintf(cport, ".%xH", htons(port));
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else
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*cport = 0;
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sprintf(mybuf,"%xH.%s%s", ntohl(net.long_e), host, cport);
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upHex(mybuf);
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return(mybuf);
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}
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char *
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ns_phost(sns)
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struct sockaddr_ns *sns;
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{
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struct sockaddr_ns work;
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static union ns_net ns_zeronet;
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char *p;
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work = *sns;
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work.sns_addr.x_port = 0;
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work.sns_addr.x_net = ns_zeronet;
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p = ns_print(&work);
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if (strncmp("0H.", p, 3) == 0)
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p += 3;
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return(p);
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}
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upHex(p0)
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char *p0;
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{
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register char *p = p0;
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for (; *p; p++) switch (*p) {
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case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
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*p += ('A' - 'a');
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}
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}
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#endif ENABLE_XNS
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