645 lines
14 KiB
C
645 lines
14 KiB
C
/*
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* Copyright (c) 1983, 1988 Regents of the University of California.
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* All rights reserved.
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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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#ifndef lint
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static char sccsid[] = "@(#)route.c 5.20 (Berkeley) 11/29/90";
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#endif /* not lint */
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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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#define KERNEL
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#include <net/route.h>
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#undef KERNEL
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#include <netinet/in.h>
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#ifdef NS
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#include <netns/ns.h>
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#endif
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#include <netdb.h>
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#include <sys/kinfo.h>
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#include <stdio.h>
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#include <string.h>
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extern int nflag, aflag, Aflag, af;
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int do_rtent;
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extern char *routename(), *netname(), *plural();
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#ifdef NS
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extern char *ns_print();
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#endif
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extern char *malloc();
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#define kget(p, d) \
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(kvm_read((off_t)(p), (char *)&(d), sizeof (d)))
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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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{ RTF_MODIFIED, 'M' },
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{ RTF_CLONING, 'C' },
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{ RTF_XRESOLVE, 'X' },
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{ RTF_LLINFO, 'L' },
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{ RTF_REJECT, 'R' },
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{ 0 }
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};
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/*
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* Print address family.
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*/
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void
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p_proto(proto)
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int proto;
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{
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switch (proto)
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{
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case AF_INET:
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printf("inet");
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break;
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case AF_NS:
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printf("ns");
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break;
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case AF_ISO:
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printf("iso");
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break;
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case AF_CCITT:
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printf("ccitt");
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break;
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default:
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printf("%d", proto);
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break;
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}
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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, treeaddr)
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off_t hostaddr, netaddr, hashsizeaddr, treeaddr;
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{
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struct mbuf mb;
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register struct ortentry *rt;
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register struct mbuf *m;
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char name[16], *flags;
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struct mbuf **routehash;
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int hashsize;
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int i, doinghost = 1;
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printf("Routing tables\n");
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if (Aflag)
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printf("%-8.8s ","Address");
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printf("%-16.16s %-18.18s %-6.6s %6.6s%8.8s %s\n",
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"Destination", "Gateway",
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"Flags", "Refs", "Use", "Interface");
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if (treeaddr)
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return treestuff(treeaddr);
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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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kget(hashsizeaddr, hashsize);
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routehash = (struct mbuf **)malloc( hashsize*sizeof (struct mbuf *) );
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kvm_read(hostaddr, (char *)routehash, hashsize*sizeof (struct mbuf *));
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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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kget(m, mb);
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if (Aflag)
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printf("%8.8x ", m);
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p_ortentry((struct ortentry *)(mb.m_dat));
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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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kvm_read(netaddr, (char *)routehash,
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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((char *)routehash);
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return;
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}
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static union {
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struct sockaddr u_sa;
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u_short u_data[128];
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} pt_u;
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int do_rtent = 0;
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struct rtentry rtentry;
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struct radix_node rnode;
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struct radix_mask rmask;
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int NewTree = 0;
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treestuff(rtree)
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off_t rtree;
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{
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struct radix_node_head *rnh, head;
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if (Aflag == 0 && NewTree)
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return(ntreestuff());
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for (kget(rtree, rnh); rnh; rnh = head.rnh_next) {
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kget(rnh, head);
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if (head.rnh_af == 0) {
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if (Aflag || af == AF_UNSPEC) {
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printf("Netmasks:\n");
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p_tree(head.rnh_treetop);
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}
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} else if (af == AF_UNSPEC || af == head.rnh_af) {
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printf("\nRoute Tree for Protocol Family ");
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p_proto(head.rnh_af);
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printf(":\n");
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do_rtent = 1;
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p_tree(head.rnh_treetop);
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}
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}
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}
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struct sockaddr *
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kgetsa(dst)
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register struct sockaddr *dst;
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{
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kget(dst, pt_u.u_sa);
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if (pt_u.u_sa.sa_len > sizeof (pt_u.u_sa)) {
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kvm_read((off_t)dst, pt_u.u_data, pt_u.u_sa.sa_len);
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}
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return (&pt_u.u_sa);
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}
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p_tree(rn)
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struct radix_node *rn;
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{
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again:
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kget(rn, rnode);
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if (rnode.rn_b < 0) {
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if (Aflag)
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printf("%-8.8x ", rn);
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if (rnode.rn_flags & RNF_ROOT)
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printf("(root node)%s",
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rnode.rn_dupedkey ? " =>\n" : "\n");
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else if (do_rtent) {
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kget(rn, rtentry);
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p_rtentry(&rtentry);
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if (Aflag)
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p_rtnode();
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} else {
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p_sockaddr(kgetsa((struct sockaddr *)rnode.rn_key),
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0, 44);
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putchar('\n');
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}
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if (rn = rnode.rn_dupedkey)
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goto again;
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} else {
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if (Aflag && do_rtent) {
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printf("%-8.8x ", rn);
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p_rtnode();
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}
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rn = rnode.rn_r;
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p_tree(rnode.rn_l);
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p_tree(rn);
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}
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}
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char nbuf[20];
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p_rtnode()
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{
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struct radix_mask *rm = rnode.rn_mklist;
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if (rnode.rn_b < 0) {
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if (rnode.rn_mask) {
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printf("\t mask ");
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p_sockaddr(kgetsa((struct sockaddr *)rnode.rn_mask),
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0, -1);
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} else if (rm == 0)
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return;
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} else {
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sprintf(nbuf, "(%d)", rnode.rn_b);
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printf("%6.6s %8.8x : %8.8x", nbuf, rnode.rn_l, rnode.rn_r);
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}
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while (rm) {
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kget(rm, rmask);
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sprintf(nbuf, " %d refs, ", rmask.rm_refs);
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printf(" mk = %8.8x {(%d),%s",
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rm, -1 - rmask.rm_b, rmask.rm_refs ? nbuf : " ");
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p_sockaddr(kgetsa((struct sockaddr *)rmask.rm_mask), 0, -1);
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putchar('}');
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if (rm = rmask.rm_mklist)
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printf(" ->");
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}
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putchar('\n');
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}
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ntreestuff()
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{
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int needed;
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char *buf, *next, *lim;
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register struct rt_msghdr *rtm;
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if ((needed = getkerninfo(KINFO_RT_DUMP, 0, 0, 0)) < 0)
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{ perror("route-getkerninfo-estimate"); exit(1);}
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if ((buf = malloc(needed)) == 0)
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{ printf("out of space\n"); exit(1);}
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if (getkerninfo(KINFO_RT_DUMP, buf, &needed, 0) < 0)
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{ perror("actual retrieval of routing table"); exit(1);}
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lim = buf + needed;
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for (next = buf; next < lim; next += rtm->rtm_msglen) {
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rtm = (struct rt_msghdr *)next;
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np_rtentry(rtm);
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}
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}
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np_rtentry(rtm)
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register struct rt_msghdr *rtm;
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{
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register struct sockaddr *sa = (struct sockaddr *)(rtm + 1);
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static int masks_done, old_af, banner_printed;
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int af = 0, interesting = RTF_UP | RTF_GATEWAY | RTF_HOST;
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#ifdef notdef
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/* for the moment, netmasks are skipped over */
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if (!banner_printed) {
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printf("Netmasks:\n");
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banner_printed = 1;
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}
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if (masks_done == 0) {
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if (rtm->rtm_addrs != RTA_DST ) {
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masks_done = 1;
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af = sa->sa_family;
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}
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} else
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#endif
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af = sa->sa_family;
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if (af != old_af) {
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printf("\nRoute Tree for Protocol Family %d:\n", af);
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old_af = af;
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}
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if (rtm->rtm_addrs == RTA_DST)
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p_sockaddr(sa, 0, 36);
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else {
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p_sockaddr(sa, rtm->rtm_flags, 16);
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if (sa->sa_len == 0)
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sa->sa_len = sizeof(long);
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sa = (struct sockaddr *)(sa->sa_len + (char *)sa);
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p_sockaddr(sa, 0, 18);
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}
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p_flags(rtm->rtm_flags & interesting, "%-6.6s ");
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putchar('\n');
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}
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p_sockaddr(sa, flags, width)
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struct sockaddr *sa;
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int flags, width;
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{
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char format[20], workbuf[128], *cp, *cplim;
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register char *cpout;
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switch(sa->sa_family) {
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case AF_INET:
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{
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register struct sockaddr_in *sin = (struct sockaddr_in *)sa;
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cp = (sin->sin_addr.s_addr == 0) ? "default" :
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((flags & RTF_HOST) ?
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routename(sin->sin_addr) : netname(sin->sin_addr, 0L));
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}
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break;
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#ifdef NS
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case AF_NS:
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cp = ns_print((struct sockaddr_ns *)sa);
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break;
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#endif
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default:
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{
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register u_short *s = ((u_short *)sa->sa_data), *slim;
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slim = (u_short *) sa + ((sa->sa_len + sizeof(u_short) - 1) /
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sizeof(u_short));
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cp = workbuf;
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cplim = cp + sizeof(workbuf) - 6;
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cp += sprintf(cp, "(%d)", sa->sa_family);
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while (s < slim && cp < cplim)
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cp += sprintf(cp, " %x", *s++);
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cp = workbuf;
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}
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}
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if (width < 0 )
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printf("%s ", cp);
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else {
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if (nflag)
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printf("%-*s ", width, cp);
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else
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printf("%-*.*s ", width, width, cp);
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}
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}
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p_flags(f, format)
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register int f;
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char *format;
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{
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char name[33], *flags;
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register struct bits *p = bits;
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for (flags = name; p->b_mask; p++)
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if (p->b_mask & f)
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*flags++ = p->b_val;
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*flags = '\0';
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printf(format, name);
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}
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p_rtentry(rt)
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register struct rtentry *rt;
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{
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char name[16];
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register struct sockaddr *sa;
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struct ifnet ifnet;
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p_sockaddr(kgetsa(rt_key(rt)), rt->rt_flags, 16);
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p_sockaddr(kgetsa(rt->rt_gateway), RTF_HOST, 18);
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p_flags(rt->rt_flags, "%-6.6s ");
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printf("%6d %8d ", 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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return;
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}
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kget(rt->rt_ifp, ifnet);
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kvm_read((off_t)ifnet.if_name, name, 16);
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printf(" %.15s%d%s", name, ifnet.if_unit,
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rt->rt_nodes[0].rn_dupedkey ? " =>\n" : "\n");
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}
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p_ortentry(rt)
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register struct ortentry *rt;
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{
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char name[16], *flags;
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register struct bits *p;
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register struct sockaddr_in *sin;
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struct ifnet ifnet;
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p_sockaddr(&rt->rt_dst, rt->rt_flags, 16);
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p_sockaddr(&rt->rt_gateway, 0, 18);
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p_flags(rt->rt_flags, "%-6.6s ");
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printf("%6d %8d ", 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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return;
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}
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kget(rt->rt_ifp, ifnet);
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kvm_read((off_t)ifnet.if_name, name, 16);
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printf(" %.15s%d\n", name, ifnet.if_unit);
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}
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char *
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routename(in)
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struct in_addr in;
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{
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register char *cp;
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static char line[MAXHOSTNAMELEN + 1];
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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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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
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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((char *)&in, sizeof (struct in_addr),
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AF_INET);
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if (hp) {
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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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strncpy(line, cp, sizeof(line) - 1);
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else {
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#define C(x) ((x) & 0xff)
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in.s_addr = ntohl(in.s_addr);
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sprintf(line, "%u.%u.%u.%u", C(in.s_addr >> 24),
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C(in.s_addr >> 16), C(in.s_addr >> 8), C(in.s_addr));
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}
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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(in, mask)
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struct in_addr in;
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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[MAXHOSTNAMELEN + 1];
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struct netent *np = 0;
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u_long net;
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register i;
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int subnetshift;
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i = ntohl(in.s_addr);
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if (!nflag && i) {
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if (mask == 0) {
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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 (i &~ mask)
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mask = (long)mask >> subnetshift;
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}
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net = i & mask;
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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);
|
|
if (np)
|
|
cp = np->n_name;
|
|
}
|
|
if (cp)
|
|
strncpy(line, cp, sizeof(line) - 1);
|
|
else if ((i & 0xffffff) == 0)
|
|
sprintf(line, "%u", C(i >> 24));
|
|
else if ((i & 0xffff) == 0)
|
|
sprintf(line, "%u.%u", C(i >> 24) , C(i >> 16));
|
|
else if ((i & 0xff) == 0)
|
|
sprintf(line, "%u.%u.%u", C(i >> 24), C(i >> 16), C(i >> 8));
|
|
else
|
|
sprintf(line, "%u.%u.%u.%u", C(i >> 24),
|
|
C(i >> 16), C(i >> 8), C(i));
|
|
return (line);
|
|
}
|
|
|
|
/*
|
|
* Print routing statistics
|
|
*/
|
|
rt_stats(off)
|
|
off_t off;
|
|
{
|
|
struct rtstat rtstat;
|
|
|
|
if (off == 0) {
|
|
printf("rtstat: symbol not in namelist\n");
|
|
return;
|
|
}
|
|
kvm_read(off, (char *)&rtstat, sizeof (rtstat));
|
|
printf("routing:\n");
|
|
printf("\t%u bad routing redirect%s\n",
|
|
rtstat.rts_badredirect, plural(rtstat.rts_badredirect));
|
|
printf("\t%u dynamically created route%s\n",
|
|
rtstat.rts_dynamic, plural(rtstat.rts_dynamic));
|
|
printf("\t%u new gateway%s due to redirects\n",
|
|
rtstat.rts_newgateway, plural(rtstat.rts_newgateway));
|
|
printf("\t%u destination%s found unreachable\n",
|
|
rtstat.rts_unreach, plural(rtstat.rts_unreach));
|
|
printf("\t%u use%s of a wildcard route\n",
|
|
rtstat.rts_wildcard, plural(rtstat.rts_wildcard));
|
|
}
|
|
#ifdef NS
|
|
short ns_nullh[] = {0,0,0};
|
|
short ns_bh[] = {-1,-1,-1};
|
|
|
|
char *
|
|
ns_print(sns)
|
|
struct sockaddr_ns *sns;
|
|
{
|
|
struct ns_addr work;
|
|
union { union ns_net net_e; u_long long_e; } net;
|
|
u_short port;
|
|
static char mybuf[50], cport[10], chost[25];
|
|
char *host = "";
|
|
register char *p; register u_char *q;
|
|
|
|
work = sns->sns_addr;
|
|
port = ntohs(work.x_port);
|
|
work.x_port = 0;
|
|
net.net_e = work.x_net;
|
|
if (ns_nullhost(work) && net.long_e == 0) {
|
|
if (port ) {
|
|
sprintf(mybuf, "*.%xH", port);
|
|
upHex(mybuf);
|
|
} else
|
|
sprintf(mybuf, "*.*");
|
|
return (mybuf);
|
|
}
|
|
|
|
if (bcmp(ns_bh, work.x_host.c_host, 6) == 0) {
|
|
host = "any";
|
|
} else if (bcmp(ns_nullh, work.x_host.c_host, 6) == 0) {
|
|
host = "*";
|
|
} else {
|
|
q = work.x_host.c_host;
|
|
sprintf(chost, "%02x%02x%02x%02x%02x%02xH",
|
|
q[0], q[1], q[2], q[3], q[4], q[5]);
|
|
for (p = chost; *p == '0' && p < chost + 12; p++);
|
|
host = p;
|
|
}
|
|
if (port)
|
|
sprintf(cport, ".%xH", htons(port));
|
|
else
|
|
*cport = 0;
|
|
|
|
sprintf(mybuf,"%xH.%s%s", ntohl(net.long_e), host, cport);
|
|
upHex(mybuf);
|
|
return(mybuf);
|
|
}
|
|
|
|
char *
|
|
ns_phost(sns)
|
|
struct sockaddr_ns *sns;
|
|
{
|
|
struct sockaddr_ns work;
|
|
static union ns_net ns_zeronet;
|
|
char *p;
|
|
|
|
work = *sns;
|
|
work.sns_addr.x_port = 0;
|
|
work.sns_addr.x_net = ns_zeronet;
|
|
|
|
p = ns_print(&work);
|
|
if (strncmp("0H.", p, 3) == 0) p += 3;
|
|
return(p);
|
|
}
|
|
upHex(p0)
|
|
char *p0;
|
|
{
|
|
register char *p = p0;
|
|
for (; *p; p++) switch (*p) {
|
|
|
|
case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
|
|
*p += ('A' - 'a');
|
|
}
|
|
}
|
|
#endif /* NS */
|