if.c revision 1.10 
1/*
2 * Copyright (c) 1983, 1988, 1993
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 *    must display the following acknowledgement:
15 *	This product includes software developed by the University of
16 *	California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 *    may be used to endorse or promote products derived from this software
19 *    without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34#ifndef lint
35/*static char sccsid[] = "from: @(#)if.c	8.2 (Berkeley) 2/21/94";*/
36static char *rcsid = "$Id: if.c,v 1.10 1995/06/12 03:03:07 mycroft Exp $";
37#endif /* not lint */
38
39#include <sys/types.h>
40#include <sys/protosw.h>
41#include <sys/socket.h>
42
43#include <net/if.h>
44#include <net/if_dl.h>
45#include <netinet/in.h>
46#include <netinet/in_var.h>
47#include <netns/ns.h>
48#include <netns/ns_if.h>
49#include <netiso/iso.h>
50#include <netiso/iso_var.h>
51#include <arpa/inet.h>
52
53#include <signal.h>
54#include <stdio.h>
55#include <string.h>
56#include <unistd.h>
57
58#include "netstat.h"
59
60#define	YES	1
61#define	NO	0
62
63static void sidewaysintpr __P((u_int, u_long));
64static void catchalarm __P((int));
65
66/*
67 * Print a description of the network interfaces.
68 */
69void
70intpr(interval, ifnetaddr)
71	int interval;
72	u_long ifnetaddr;
73{
74	struct ifnet ifnet;
75	union {
76		struct ifaddr ifa;
77		struct in_ifaddr in;
78		struct ns_ifaddr ns;
79		struct iso_ifaddr iso;
80	} ifaddr;
81	u_long ifaddraddr;
82	struct sockaddr *sa;
83	char name[16];
84
85	if (ifnetaddr == 0) {
86		printf("ifnet: symbol not defined\n");
87		return;
88	}
89	if (interval) {
90		sidewaysintpr((unsigned)interval, ifnetaddr);
91		return;
92	}
93	if (kread(ifnetaddr, (char *)&ifnetaddr, sizeof ifnetaddr))
94		return;
95	printf("%-5.5s %-5.5s %-11.11s %-15.15s %8.8s %5.5s %8.8s %5.5s",
96		"Name", "Mtu", "Network", "Address", "Ipkts", "Ierrs",
97		"Opkts", "Oerrs");
98	printf(" %5s", "Coll");
99	if (tflag)
100		printf(" %s", "Time");
101	if (dflag)
102		printf(" %s", "Drop");
103	putchar('\n');
104	ifaddraddr = 0;
105	while (ifnetaddr || ifaddraddr) {
106		struct sockaddr_in *sin;
107		register char *cp;
108		int n, m;
109
110		if (ifaddraddr == 0) {
111			if (kread(ifnetaddr, (char *)&ifnet, sizeof ifnet) ||
112			    kread((u_long)ifnet.if_name, name, 16))
113				return;
114			name[15] = '\0';
115			ifnetaddr = (u_long)ifnet.if_list.tqe_next;
116			if (interface != 0 && (strcmp(name, interface) != 0 ||
117			    unit != ifnet.if_unit))
118				continue;
119			cp = index(name, '\0');
120			cp += sprintf(cp, "%d", ifnet.if_unit);
121			if ((ifnet.if_flags & IFF_UP) == 0)
122				*cp++ = '*';
123			*cp = '\0';
124			ifaddraddr = (u_long)ifnet.if_addrlist.tqh_first;
125		}
126		printf("%-5.5s %-5d ", name, ifnet.if_mtu);
127		if (ifaddraddr == 0) {
128			printf("%-11.11s ", "none");
129			printf("%-15.15s ", "none");
130		} else {
131			if (kread(ifaddraddr, (char *)&ifaddr, sizeof ifaddr)) {
132				ifaddraddr = 0;
133				continue;
134			}
135#define CP(x) ((char *)(x))
136			cp = (CP(ifaddr.ifa.ifa_addr) - CP(ifaddraddr)) +
137				CP(&ifaddr); sa = (struct sockaddr *)cp;
138			switch (sa->sa_family) {
139			case AF_UNSPEC:
140				printf("%-11.11s ", "none");
141				printf("%-15.15s ", "none");
142				break;
143			case AF_INET:
144				sin = (struct sockaddr_in *)sa;
145#ifdef notdef
146				/* can't use inet_makeaddr because kernel
147				 * keeps nets unshifted.
148				 */
149				in = inet_makeaddr(ifaddr.in.ia_subnet,
150					INADDR_ANY);
151				printf("%-11.11s ", netname(in.s_addr,
152				    ifaddr.in.ia_subnetmask));
153#else
154				printf("%-11.11s ",
155				    netname(htonl(ifaddr.in.ia_subnet),
156				    ifaddr.in.ia_subnetmask));
157#endif
158				printf("%-15.15s ",
159				    routename(sin->sin_addr.s_addr));
160
161				if (aflag) {
162					u_long multiaddr;
163					struct in_multi inm;
164
165					multiaddr = (u_long)ifaddr.in.ia_multiaddrs.lh_first;
166					while (multiaddr != 0) {
167						kread(multiaddr, (char *)&inm,
168						    sizeof inm);
169						printf("\n%23s %-15.15s ", "",
170						    routename(inm.inm_addr.s_addr));
171						multiaddr = (u_long)inm.inm_list.le_next;
172					}
173				}
174				break;
175			case AF_NS:
176				{
177				struct sockaddr_ns *sns =
178					(struct sockaddr_ns *)sa;
179				u_long net;
180				char netnum[8];
181
182				*(union ns_net *) &net = sns->sns_addr.x_net;
183		sprintf(netnum, "%lxH", ntohl(net));
184				upHex(netnum);
185				printf("ns:%-8s ", netnum);
186				printf("%-15s ",
187				    ns_phost((struct sockaddr *)sns));
188				}
189				break;
190			case AF_LINK:
191				{
192				struct sockaddr_dl *sdl =
193					(struct sockaddr_dl *)sa;
194				    cp = (char *)LLADDR(sdl);
195				    n = sdl->sdl_alen;
196				}
197				m = printf("%-11.11s ", "<Link>");
198				goto hexprint;
199			default:
200				m = printf("(%d)", sa->sa_family);
201				for (cp = sa->sa_len + (char *)sa;
202					--cp > sa->sa_data && (*cp == 0);) {}
203				n = cp - sa->sa_data + 1;
204				cp = sa->sa_data;
205			hexprint:
206				while (--n >= 0)
207					m += printf("%x%c", *cp++ & 0xff,
208						    n > 0 ? '.' : ' ');
209				m = 28 - m;
210				while (m-- > 0)
211					putchar(' ');
212				break;
213			}
214			ifaddraddr = (u_long)ifaddr.ifa.ifa_list.tqe_next;
215		}
216		printf("%8d %5d %8d %5d %5d",
217		    ifnet.if_ipackets, ifnet.if_ierrors,
218		    ifnet.if_opackets, ifnet.if_oerrors,
219		    ifnet.if_collisions);
220		if (tflag)
221			printf(" %3d", ifnet.if_timer);
222		if (dflag)
223			printf(" %3d", ifnet.if_snd.ifq_drops);
224		putchar('\n');
225	}
226}
227
228#define	MAXIF	10
229struct	iftot {
230	char	ift_name[16];		/* interface name */
231	int	ift_ip;			/* input packets */
232	int	ift_ie;			/* input errors */
233	int	ift_op;			/* output packets */
234	int	ift_oe;			/* output errors */
235	int	ift_co;			/* collisions */
236	int	ift_dr;			/* drops */
237} iftot[MAXIF];
238
239u_char	signalled;			/* set if alarm goes off "early" */
240
241/*
242 * Print a running summary of interface statistics.
243 * Repeat display every interval seconds, showing statistics
244 * collected over that interval.  Assumes that interval is non-zero.
245 * First line printed at top of screen is always cumulative.
246 */
247static void
248sidewaysintpr(interval, off)
249	unsigned interval;
250	u_long off;
251{
252	struct ifnet ifnet;
253	u_long firstifnet;
254	register struct iftot *ip, *total;
255	register int line;
256	struct iftot *lastif, *sum, *interesting;
257	int oldmask;
258
259	if (kread(off, (char *)&firstifnet, sizeof (u_long)))
260		return;
261	lastif = iftot;
262	sum = iftot + MAXIF - 1;
263	total = sum - 1;
264	interesting = iftot;
265	for (off = firstifnet, ip = iftot; off;) {
266		char *cp;
267
268		if (kread(off, (char *)&ifnet, sizeof ifnet))
269			break;
270		ip->ift_name[0] = '(';
271		if (kread((u_long)ifnet.if_name, ip->ift_name + 1, 15))
272			break;
273		if (interface && strcmp(ip->ift_name + 1, interface) == 0 &&
274		    unit == ifnet.if_unit)
275			interesting = ip;
276		ip->ift_name[15] = '\0';
277		cp = index(ip->ift_name, '\0');
278		sprintf(cp, "%d)", ifnet.if_unit);
279		ip++;
280		if (ip >= iftot + MAXIF - 2)
281			break;
282		off = (u_long)ifnet.if_list.tqe_next;
283	}
284	lastif = ip;
285
286	(void)signal(SIGALRM, catchalarm);
287	signalled = NO;
288	(void)alarm(interval);
289banner:
290	printf("   input    %-6.6s    output       ", interesting->ift_name);
291	if (lastif - iftot > 0) {
292		if (dflag)
293			printf("      ");
294		printf("     input   (Total)    output");
295	}
296	for (ip = iftot; ip < iftot + MAXIF; ip++) {
297		ip->ift_ip = 0;
298		ip->ift_ie = 0;
299		ip->ift_op = 0;
300		ip->ift_oe = 0;
301		ip->ift_co = 0;
302		ip->ift_dr = 0;
303	}
304	putchar('\n');
305	printf("%8.8s %5.5s %8.8s %5.5s %5.5s ",
306		"packets", "errs", "packets", "errs", "colls");
307	if (dflag)
308		printf("%5.5s ", "drops");
309	if (lastif - iftot > 0)
310		printf(" %8.8s %5.5s %8.8s %5.5s %5.5s",
311			"packets", "errs", "packets", "errs", "colls");
312	if (dflag)
313		printf(" %5.5s", "drops");
314	putchar('\n');
315	fflush(stdout);
316	line = 0;
317loop:
318	sum->ift_ip = 0;
319	sum->ift_ie = 0;
320	sum->ift_op = 0;
321	sum->ift_oe = 0;
322	sum->ift_co = 0;
323	sum->ift_dr = 0;
324	for (off = firstifnet, ip = iftot; off && ip < lastif; ip++) {
325		if (kread(off, (char *)&ifnet, sizeof ifnet)) {
326			off = 0;
327			continue;
328		}
329		if (ip == interesting) {
330			printf("%8d %5d %8d %5d %5d",
331				ifnet.if_ipackets - ip->ift_ip,
332				ifnet.if_ierrors - ip->ift_ie,
333				ifnet.if_opackets - ip->ift_op,
334				ifnet.if_oerrors - ip->ift_oe,
335				ifnet.if_collisions - ip->ift_co);
336			if (dflag)
337				printf(" %5d",
338				    ifnet.if_snd.ifq_drops - ip->ift_dr);
339		}
340		ip->ift_ip = ifnet.if_ipackets;
341		ip->ift_ie = ifnet.if_ierrors;
342		ip->ift_op = ifnet.if_opackets;
343		ip->ift_oe = ifnet.if_oerrors;
344		ip->ift_co = ifnet.if_collisions;
345		ip->ift_dr = ifnet.if_snd.ifq_drops;
346		sum->ift_ip += ip->ift_ip;
347		sum->ift_ie += ip->ift_ie;
348		sum->ift_op += ip->ift_op;
349		sum->ift_oe += ip->ift_oe;
350		sum->ift_co += ip->ift_co;
351		sum->ift_dr += ip->ift_dr;
352		off = (u_long)ifnet.if_list.tqe_next;
353	}
354	if (lastif - iftot > 0) {
355		printf("  %8d %5d %8d %5d %5d",
356			sum->ift_ip - total->ift_ip,
357			sum->ift_ie - total->ift_ie,
358			sum->ift_op - total->ift_op,
359			sum->ift_oe - total->ift_oe,
360			sum->ift_co - total->ift_co);
361		if (dflag)
362			printf(" %5d", sum->ift_dr - total->ift_dr);
363	}
364	*total = *sum;
365	putchar('\n');
366	fflush(stdout);
367	line++;
368	oldmask = sigblock(sigmask(SIGALRM));
369	if (! signalled) {
370		sigpause(0);
371	}
372	sigsetmask(oldmask);
373	signalled = NO;
374	(void)alarm(interval);
375	if (line == 21)
376		goto banner;
377	goto loop;
378	/*NOTREACHED*/
379}
380
381/*
382 * Called if an interval expires before sidewaysintpr has completed a loop.
383 * Sets a flag to not wait for the alarm.
384 */
385static void
386catchalarm(signo)
387	int signo;
388{
389	signalled = YES;
390}
391