769 lines
17 KiB
C
769 lines
17 KiB
C
/* $NetBSD: route.c,v 1.25 1997/10/28 22:38:48 kml Exp $ */
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/*
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* Copyright (c) 1983, 1988, 1993
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* The Regents of the University of California. 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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#include <sys/cdefs.h>
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#ifndef lint
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#if 0
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static char sccsid[] = "from: @(#)route.c 8.3 (Berkeley) 3/9/94";
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#else
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__RCSID("$NetBSD: route.c,v 1.25 1997/10/28 22:38:48 kml Exp $");
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#endif
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#endif /* not lint */
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#include <sys/param.h>
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#include <sys/protosw.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/if_dl.h>
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#include <net/if_types.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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#include <netatalk/at.h>
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#include <netns/ns.h>
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#include <sys/sysctl.h>
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#include <netdb.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include "netstat.h"
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#define kget(p, d) (kread((u_long)(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_REJECT, 'R' },
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{ RTF_DYNAMIC, 'D' },
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{ RTF_MODIFIED, 'M' },
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{ RTF_DONE, 'd' }, /* Completed -- for routing messages only */
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{ RTF_MASK, 'm' }, /* Mask Present -- for routing messages only */
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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_STATIC, 'S' },
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{ RTF_PROTO1, '1' },
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{ RTF_PROTO2, '2' },
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{ 0 }
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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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static struct sockaddr *kgetsa __P((struct sockaddr *));
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static void p_tree __P((struct radix_node *));
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static void p_rtnode __P((void));
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static void ntreestuff __P((void));
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static void np_rtentry __P((struct rt_msghdr *));
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static void p_sockaddr __P((const struct sockaddr *,
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const struct sockaddr *, int, int));
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static void p_flags __P((int, char *));
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static void p_rtentry __P((struct rtentry *));
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static void ntreestuff __P((void));
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static u_long forgemask __P((u_long));
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static void domask __P((char *, u_long, u_long));
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/*
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* Print routing tables.
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*/
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void
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routepr(rtree)
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u_long rtree;
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{
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struct radix_node_head *rnh, head;
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int i;
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printf("Routing tables\n");
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if (Aflag == 0 && NewTree)
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ntreestuff();
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else {
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if (rtree == 0) {
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printf("rt_tables: symbol not in namelist\n");
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return;
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}
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kget(rtree, rt_tables);
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for (i = 0; i <= AF_MAX; i++) {
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if ((rnh = rt_tables[i]) == 0)
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continue;
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kget(rnh, head);
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if (i == AF_UNSPEC) {
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if (Aflag && af == 0) {
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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 == i) {
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pr_family(i);
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do_rtent = 1;
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pr_rthdr();
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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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}
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/*
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* Print address family header before a section of the routing table.
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*/
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void
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pr_family(af)
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int af;
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{
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char *afname;
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switch (af) {
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case AF_INET:
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afname = "Internet";
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break;
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case AF_NS:
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afname = "XNS";
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break;
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case AF_ISO:
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afname = "ISO";
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break;
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case AF_APPLETALK:
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afname = "AppleTalk";
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break;
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case AF_CCITT:
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afname = "X.25";
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break;
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default:
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afname = NULL;
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break;
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}
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if (afname)
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printf("\n%s:\n", afname);
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else
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printf("\nProtocol Family %d:\n", af);
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}
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/* column widths; each followed by one space */
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#define WID_DST 18 /* width of destination column */
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#define WID_GW 18 /* width of gateway column */
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/*
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* Print header for routing table columns.
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*/
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void
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pr_rthdr()
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{
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if (Aflag)
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printf("%-8.8s ","Address");
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printf("%-*.*s %-*.*s %-6.6s %6.6s%8.8s %6.6s %s\n",
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WID_DST, WID_DST, "Destination",
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WID_GW, WID_GW, "Gateway",
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"Flags", "Refs", "Use", "Mtu", "Interface");
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}
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static struct sockaddr *
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kgetsa(dst)
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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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kread((u_long)dst, (char *)pt_u.u_data, pt_u.u_sa.sa_len);
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return (&pt_u.u_sa);
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}
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static void
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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("%-8.8lx ", (u_long) rn);
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if (rnode.rn_flags & RNF_ROOT) {
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if (Aflag)
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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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NULL, 0, 44);
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putchar('\n');
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}
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if ((rn = rnode.rn_dupedkey) != NULL)
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goto again;
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} else {
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if (Aflag && do_rtent) {
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printf("%-8.8lx ", (u_long) 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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static void
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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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NULL, 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 %8.8lx : %8.8lx", nbuf, (u_long) rnode.rn_l,
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(u_long) 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 = %8.8lx {(%d),%s", (u_long) rm,
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-1 - rmask.rm_b, rmask.rm_refs ? nbuf : " ");
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if (rmask.rm_flags & RNF_NORMAL) {
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struct radix_node rnode_aux;
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printf(" <normal>, ");
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kget(rmask.rm_leaf, rnode_aux);
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p_sockaddr(kgetsa((struct sockaddr *)rnode_aux.rn_mask),
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NULL, 0, -1);
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} else
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p_sockaddr(kgetsa((struct sockaddr *)rmask.rm_mask),
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NULL, 0, -1);
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putchar('}');
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if ((rm = rmask.rm_mklist) != NULL)
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printf(" ->");
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}
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putchar('\n');
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}
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static void
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ntreestuff()
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{
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size_t needed;
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int mib[6];
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char *buf, *next, *lim;
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struct rt_msghdr *rtm;
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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] = 0;
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mib[4] = NET_RT_DUMP;
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mib[5] = 0;
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if (sysctl(mib, 6, NULL, &needed, NULL, 0) < 0)
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{ perror("route-sysctl-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 (sysctl(mib, 6, buf, &needed, NULL, 0) < 0)
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{ perror("sysctl 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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static void
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np_rtentry(rtm)
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struct rt_msghdr *rtm;
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{
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struct sockaddr *sa = (struct sockaddr *)(rtm + 1);
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#ifdef notdef
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static int masks_done, banner_printed;
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#endif
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static int old_af;
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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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pr_family(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, NULL, 0, 36);
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else {
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p_sockaddr(sa, NULL, 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, NULL, 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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static void
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p_sockaddr(sa, mask, flags, width)
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const struct sockaddr *sa, *mask;
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int flags, width;
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{
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char workbuf[128], *cplim;
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char *cp = workbuf;
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switch(sa->sa_family) {
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case AF_INET:
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{
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struct sockaddr_in *sin = (struct sockaddr_in *)sa;
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if (sin->sin_addr.s_addr == INADDR_ANY)
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cp = "default";
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else if (flags & RTF_HOST)
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cp = routename(sin->sin_addr.s_addr);
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else if (mask)
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cp = netname(sin->sin_addr.s_addr,
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((struct sockaddr_in *)mask)->sin_addr.s_addr);
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else
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cp = netname(sin->sin_addr.s_addr, INADDR_ANY);
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break;
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}
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case AF_APPLETALK:
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case 0:
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{
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if (!(flags & RTF_HOST) && mask)
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cp = atalk_print2(sa,mask,11);
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else
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cp = atalk_print(sa,11);
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break;
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}
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case AF_NS:
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cp = ns_print((struct sockaddr *)sa);
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break;
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case AF_LINK:
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{
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struct sockaddr_dl *sdl = (struct sockaddr_dl *)sa;
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if (sdl->sdl_nlen == 0 && sdl->sdl_alen == 0 &&
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sdl->sdl_slen == 0)
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(void) sprintf(workbuf, "link#%d", sdl->sdl_index);
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else switch (sdl->sdl_type) {
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case IFT_FDDI:
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case IFT_ETHER:
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{
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int i;
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u_char *lla = (u_char *)sdl->sdl_data +
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sdl->sdl_nlen;
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cplim = "";
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for (i = 0; i < sdl->sdl_alen; i++, lla++) {
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cp += sprintf(cp, "%s%02x", cplim, *lla);
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cplim = ":";
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}
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cp = workbuf;
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break;
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}
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default:
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cp = link_ntoa(sdl);
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break;
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}
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break;
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}
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default:
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{
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u_char *s = (u_char *)sa->sa_data, *slim;
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slim = sa->sa_len + (u_char *) sa;
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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, " %02x", *s++);
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if (s < slim)
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cp += sprintf(cp, "%02x", *s++);
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}
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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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static void
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p_flags(f, format)
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int f;
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char *format;
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{
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char name[33], *flags;
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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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|
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static void
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p_rtentry(rt)
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struct rtentry *rt;
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{
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static struct ifnet ifnet, *lastif;
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struct sockaddr *sa, addr, mask;
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|
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if (!(sa = kgetsa(rt_key(rt))))
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memset(&addr, 0, sizeof addr);
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else
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addr = *sa;
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if (!rt_mask(rt) || !(sa = kgetsa(rt_mask(rt))))
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memset(&mask, 0, sizeof mask);
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else
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mask = *sa;
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p_sockaddr(&addr, &mask, rt->rt_flags, WID_DST);
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p_sockaddr(kgetsa(rt->rt_gateway), NULL, RTF_HOST, WID_GW);
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p_flags(rt->rt_flags, "%-6.6s ");
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printf("%6d %8ld ", rt->rt_refcnt, rt->rt_use);
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if (rt->rt_rmx.rmx_mtu)
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printf("%6ld%c", rt->rt_rmx.rmx_mtu,
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(rt->rt_rmx.rmx_locks & RTV_MTU) ? 'L' : ' ');
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else
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printf("%6s ", "-");
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if (rt->rt_ifp) {
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if (rt->rt_ifp != lastif) {
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kget(rt->rt_ifp, ifnet);
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lastif = rt->rt_ifp;
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}
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|
printf(" %.16s%s", ifnet.if_xname,
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rt->rt_nodes[0].rn_dupedkey ? " =>" : "");
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|
}
|
|
putchar('\n');
|
|
}
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|
|
char *
|
|
routename(in)
|
|
u_int32_t in;
|
|
{
|
|
char *cp;
|
|
static char line[MAXHOSTNAMELEN + 1];
|
|
struct hostent *hp;
|
|
static char domain[MAXHOSTNAMELEN + 1];
|
|
static int first = 1;
|
|
|
|
if (first) {
|
|
first = 0;
|
|
if (gethostname(domain, MAXHOSTNAMELEN) == 0 &&
|
|
(cp = strchr(domain, '.')))
|
|
(void) strcpy(domain, cp + 1);
|
|
else
|
|
domain[0] = 0;
|
|
}
|
|
cp = 0;
|
|
if (!nflag) {
|
|
hp = gethostbyaddr((char *)&in, sizeof (struct in_addr),
|
|
AF_INET);
|
|
if (hp) {
|
|
if ((cp = strchr(hp->h_name, '.')) &&
|
|
!strcmp(cp + 1, domain))
|
|
*cp = 0;
|
|
cp = hp->h_name;
|
|
}
|
|
}
|
|
if (cp)
|
|
strncpy(line, cp, sizeof(line) - 1);
|
|
else {
|
|
#define C(x) ((x) & 0xff)
|
|
in = ntohl(in);
|
|
sprintf(line, "%u.%u.%u.%u",
|
|
C(in >> 24), C(in >> 16), C(in >> 8), C(in));
|
|
}
|
|
return (line);
|
|
}
|
|
|
|
static u_long
|
|
forgemask(a)
|
|
u_long a;
|
|
{
|
|
u_long m;
|
|
|
|
if (IN_CLASSA(a))
|
|
m = IN_CLASSA_NET;
|
|
else if (IN_CLASSB(a))
|
|
m = IN_CLASSB_NET;
|
|
else
|
|
m = IN_CLASSC_NET;
|
|
return (m);
|
|
}
|
|
|
|
static void
|
|
domask(dst, addr, mask)
|
|
char *dst;
|
|
u_long addr, mask;
|
|
{
|
|
int b, i;
|
|
|
|
if (!mask || (forgemask(addr) == mask)) {
|
|
*dst = '\0';
|
|
return;
|
|
}
|
|
i = 0;
|
|
for (b = 0; b < 32; b++)
|
|
if (mask & (1 << b)) {
|
|
int bb;
|
|
|
|
i = b;
|
|
for (bb = b+1; bb < 32; bb++)
|
|
if (!(mask & (1 << bb))) {
|
|
i = -1; /* noncontig */
|
|
break;
|
|
}
|
|
break;
|
|
}
|
|
if (i == -1)
|
|
sprintf(dst, "&0x%lx", mask);
|
|
else
|
|
sprintf(dst, "/%d", 32-i);
|
|
}
|
|
|
|
/*
|
|
* Return the name of the network whose address is given.
|
|
* The address is assumed to be that of a net or subnet, not a host.
|
|
*/
|
|
char *
|
|
netname(in, mask)
|
|
u_int32_t in, mask;
|
|
{
|
|
char *cp = 0;
|
|
static char line[MAXHOSTNAMELEN + 4];
|
|
struct netent *np = 0;
|
|
u_int32_t net, omask;
|
|
u_int32_t i;
|
|
int subnetshift;
|
|
|
|
i = ntohl(in);
|
|
omask = mask = ntohl(mask);
|
|
if (!nflag && i != INADDR_ANY) {
|
|
if (mask == INADDR_ANY) {
|
|
switch (mask = forgemask(i)) {
|
|
case IN_CLASSA_NET:
|
|
subnetshift = 8;
|
|
break;
|
|
case IN_CLASSB_NET:
|
|
subnetshift = 8;
|
|
break;
|
|
case IN_CLASSC_NET:
|
|
subnetshift = 4;
|
|
break;
|
|
default:
|
|
abort();
|
|
}
|
|
/*
|
|
* If there are more bits than the standard mask
|
|
* would suggest, subnets must be in use.
|
|
* Guess at the subnet mask, assuming reasonable
|
|
* width subnet fields.
|
|
*/
|
|
while (i &~ mask)
|
|
mask = (long)mask >> subnetshift;
|
|
}
|
|
net = i & mask;
|
|
while ((mask & 1) == 0)
|
|
mask >>= 1, net >>= 1;
|
|
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));
|
|
domask(line+strlen(line), i, omask);
|
|
return (line);
|
|
}
|
|
|
|
/*
|
|
* Print routing statistics
|
|
*/
|
|
void
|
|
rt_stats(off)
|
|
u_long off;
|
|
{
|
|
struct rtstat rtstat;
|
|
|
|
if (off == 0) {
|
|
printf("rtstat: symbol not in namelist\n");
|
|
return;
|
|
}
|
|
kread(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));
|
|
}
|
|
short ns_nullh[] = {0,0,0};
|
|
short ns_bh[] = {-1,-1,-1};
|
|
|
|
char *
|
|
ns_print(sa)
|
|
struct sockaddr *sa;
|
|
{
|
|
struct sockaddr_ns *sns = (struct sockaddr_ns*)sa;
|
|
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 = "";
|
|
char *p;
|
|
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 (memcmp(ns_bh, work.x_host.c_host, 6) == 0) {
|
|
host = "any";
|
|
} else if (memcmp(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++)
|
|
continue;
|
|
host = p;
|
|
}
|
|
if (port)
|
|
sprintf(cport, ".%xH", htons(port));
|
|
else
|
|
*cport = 0;
|
|
|
|
sprintf(mybuf, "%xH.%s%s", (int)ntohl(net.long_e), host, cport);
|
|
upHex(mybuf);
|
|
return(mybuf);
|
|
}
|
|
|
|
char *
|
|
ns_phost(sa)
|
|
struct sockaddr *sa;
|
|
{
|
|
struct sockaddr_ns *sns = (struct sockaddr_ns *)sa;
|
|
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((struct sockaddr *)&work);
|
|
if (strncmp("0H.", p, 3) == 0) p += 3;
|
|
return(p);
|
|
}
|
|
|
|
void
|
|
upHex(p0)
|
|
char *p0;
|
|
{
|
|
char *p = p0;
|
|
for (; *p; p++) switch (*p) {
|
|
|
|
case 'a': case 'b': case 'c': case 'd': case 'e': case 'f':
|
|
*p += ('A' - 'a');
|
|
}
|
|
}
|