if.c revision 1.32 
1/*	$NetBSD: if.c,v 1.32 1999/07/01 18:40:35 itojun Exp $	*/
2
3/*
4 * Copyright (c) 1983, 1988, 1993
5 *	The Regents of the University of California.  All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 * 3. All advertising materials mentioning features or use of this software
16 *    must display the following acknowledgement:
17 *	This product includes software developed by the University of
18 *	California, Berkeley and its contributors.
19 * 4. Neither the name of the University nor the names of its contributors
20 *    may be used to endorse or promote products derived from this software
21 *    without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * SUCH DAMAGE.
34 */
35
36#include <sys/cdefs.h>
37#ifndef lint
38#if 0
39static char sccsid[] = "from: @(#)if.c	8.2 (Berkeley) 2/21/94";
40#else
41__RCSID("$NetBSD: if.c,v 1.32 1999/07/01 18:40:35 itojun Exp $");
42#endif
43#endif /* not lint */
44
45#include <sys/types.h>
46#include <sys/protosw.h>
47#include <sys/socket.h>
48
49#include <net/if.h>
50#include <net/if_dl.h>
51#include <net/if_types.h>
52#include <netinet/in.h>
53#include <netinet/in_var.h>
54#include <netns/ns.h>
55#include <netns/ns_if.h>
56#include <netiso/iso.h>
57#include <netiso/iso_var.h>
58#include <arpa/inet.h>
59
60#include <signal.h>
61#include <stdio.h>
62#include <string.h>
63#include <unistd.h>
64
65#include "netstat.h"
66
67#define	YES	1
68#define	NO	0
69
70static void sidewaysintpr __P((u_int, u_long));
71static void catchalarm __P((int));
72
73#ifdef INET6
74char *netname6 __P((struct in6_addr *, struct in6_addr *));
75static char ntop_buf[INET6_ADDRSTRLEN];		/* for inet_ntop() */
76#endif
77
78/*
79 * Print a description of the network interfaces.
80 * NOTE: ifnetaddr is the location of the kernel global "ifnet",
81 * which is a TAILQ_HEAD.
82 */
83void
84intpr(interval, ifnetaddr)
85	int interval;
86	u_long ifnetaddr;
87{
88	struct ifnet ifnet;
89	union {
90		struct ifaddr ifa;
91		struct in_ifaddr in;
92#ifdef INET6
93		struct in6_ifaddr in6;
94#endif /* INET6 */
95		struct ns_ifaddr ns;
96		struct iso_ifaddr iso;
97	} ifaddr;
98	u_long ifaddraddr;
99	struct sockaddr *sa;
100	struct ifnet_head ifhead;	/* TAILQ_HEAD */
101	char name[IFNAMSIZ];
102
103	if (ifnetaddr == 0) {
104		printf("ifnet: symbol not defined\n");
105		return;
106	}
107	if (interval) {
108		sidewaysintpr((unsigned)interval, ifnetaddr);
109		return;
110	}
111
112	/*
113	 * Find the pointer to the first ifnet structure.  Replace
114	 * the pointer to the TAILQ_HEAD with the actual pointer
115	 * to the first list element.
116	 */
117	if (kread(ifnetaddr, (char *)&ifhead, sizeof ifhead))
118		return;
119	ifnetaddr = (u_long)ifhead.tqh_first;
120
121	if (bflag) {
122		printf("%-5.5s %-5.5s %-13.13s %-17.17s "
123			"%10.10s %10.10s",
124			"Name", "Mtu", "Network", "Address",
125			"Ibytes", "Obytes");
126	} else {
127		printf("%-5.5s %-5.5s %-13.13s %-17.17s "
128			"%8.8s %5.5s %8.8s %5.5s %5.5s",
129			"Name", "Mtu", "Network", "Address", "Ipkts", "Ierrs",
130			"Opkts", "Oerrs", "Colls");
131	}
132	if (tflag)
133		printf(" %4.4s", "Time");
134	if (dflag)
135		printf(" %5.5s", "Drops");
136	putchar('\n');
137	ifaddraddr = 0;
138	while (ifnetaddr || ifaddraddr) {
139		struct sockaddr_in *sin;
140#ifdef INET6
141		struct sockaddr_in6 *sin6;
142#endif /* INET6 */
143		char *cp;
144		int n, m;
145
146		if (ifaddraddr == 0) {
147			if (kread(ifnetaddr, (char *)&ifnet, sizeof ifnet))
148				return;
149			memmove(name, ifnet.if_xname, IFNAMSIZ);
150			name[IFNAMSIZ - 1] = '\0';	/* sanity */
151			ifnetaddr = (u_long)ifnet.if_list.tqe_next;
152			if (interface != 0 && strcmp(name, interface) != 0)
153				continue;
154			cp = strchr(name, '\0');
155			if ((ifnet.if_flags & IFF_UP) == 0)
156				*cp++ = '*';
157			*cp = '\0';
158			ifaddraddr = (u_long)ifnet.if_addrlist.tqh_first;
159		}
160		printf("%-5.5s %-5lu ", name, ifnet.if_mtu);
161		if (ifaddraddr == 0) {
162			printf("%-13.13s ", "none");
163			printf("%-17.17s ", "none");
164		} else {
165			char hexsep = '.';		/* for hexprint */
166			const char *hexfmt = "%x%c";	/* for hexprint */
167			if (kread(ifaddraddr, (char *)&ifaddr, sizeof ifaddr)) {
168				ifaddraddr = 0;
169				continue;
170			}
171#define CP(x) ((char *)(x))
172			cp = (CP(ifaddr.ifa.ifa_addr) - CP(ifaddraddr)) +
173				CP(&ifaddr); sa = (struct sockaddr *)cp;
174			switch (sa->sa_family) {
175			case AF_UNSPEC:
176				printf("%-13.13s ", "none");
177				printf("%-17.17s ", "none");
178				break;
179			case AF_INET:
180				sin = (struct sockaddr_in *)sa;
181#ifdef notdef
182				/*
183				 * can't use inet_makeaddr because kernel
184				 * keeps nets unshifted.
185				 */
186				in = inet_makeaddr(ifaddr.in.ia_subnet,
187					INADDR_ANY);
188				printf("%-13.13s ", netname(in.s_addr,
189				    ifaddr.in.ia_subnetmask));
190#else
191				printf("%-13.13s ",
192				    netname(ifaddr.in.ia_subnet,
193				    ifaddr.in.ia_subnetmask));
194#endif
195				printf("%-17.17s ",
196				    routename(sin->sin_addr.s_addr));
197
198				if (aflag) {
199					u_long multiaddr;
200					struct in_multi inm;
201
202					multiaddr = (u_long)
203					    ifaddr.in.ia_multiaddrs.lh_first;
204					while (multiaddr != 0) {
205						kread(multiaddr, (char *)&inm,
206						   sizeof inm);
207						printf("\n%25s %-17.17s ", "",
208						   routename(
209						      inm.inm_addr.s_addr));
210						multiaddr =
211						   (u_long)inm.inm_list.le_next;
212					}
213				}
214				break;
215#ifdef INET6
216			case AF_INET6:
217				sin6 = (struct sockaddr_in6 *)sa;
218				printf("%-13.13s ",
219				    netname6(&ifaddr.in6.ia_addr.sin6_addr,
220					&ifaddr.in6.ia_prefixmask.sin6_addr));
221				printf("%-17.17s ",
222				    (char *)inet_ntop(AF_INET6,
223					&sin6->sin6_addr,
224					ntop_buf, sizeof(ntop_buf)));
225				break;
226#endif /*INET6*/
227#ifndef SMALL
228			case AF_APPLETALK:
229				printf("atalk:%-7.7s ",
230				       atalk_print(sa,0x10));
231				printf("%-17.17s ", atalk_print(sa,0x0b));
232				break;
233			case AF_NS:
234				{
235				struct sockaddr_ns *sns =
236					(struct sockaddr_ns *)sa;
237				u_long net;
238				char netnum[8];
239
240				*(union ns_net *)&net = sns->sns_addr.x_net;
241				(void)sprintf(netnum, "%xH",
242				    (u_int32_t)ntohl(net));
243				upHex(netnum);
244				printf("ns:%-10s ", netnum);
245				printf("%-17.17s ",
246				    ns_phost((struct sockaddr *)sns));
247				}
248				break;
249#endif
250			case AF_LINK:
251				{
252				struct sockaddr_dl *sdl =
253					(struct sockaddr_dl *)sa;
254				    cp = (char *)LLADDR(sdl);
255				    if (sdl->sdl_type == IFT_FDDI
256					|| sdl->sdl_type == IFT_ETHER)
257					    hexsep = ':', hexfmt = "%02x%c";
258				    n = sdl->sdl_alen;
259				}
260				m = printf("%-13.13s ", "<Link>");
261				goto hexprint;
262			default:
263				m = printf("(%d)", sa->sa_family);
264				for (cp = sa->sa_len + (char *)sa;
265					--cp > sa->sa_data && (*cp == 0);) {}
266				n = cp - sa->sa_data + 1;
267				cp = sa->sa_data;
268			hexprint:
269				while (--n >= 0)
270					m += printf(hexfmt, *cp++ & 0xff,
271						    n > 0 ? hexsep : ' ');
272				m = 32 - m;
273				while (m-- > 0)
274					putchar(' ');
275				break;
276			}
277			ifaddraddr = (u_long)ifaddr.ifa.ifa_list.tqe_next;
278		}
279		if (bflag) {
280			printf("%10lu %10lu",
281			       ifnet.if_ibytes, ifnet.if_obytes);
282		} else {
283			printf("%8lu %5lu %8lu %5lu %5lu",
284			       ifnet.if_ipackets, ifnet.if_ierrors,
285			       ifnet.if_opackets, ifnet.if_oerrors,
286			       ifnet.if_collisions);
287		}
288		if (tflag)
289			printf(" %4d", ifnet.if_timer);
290		if (dflag)
291			printf(" %5d", ifnet.if_snd.ifq_drops);
292		putchar('\n');
293	}
294}
295
296#define	MAXIF	100
297struct	iftot {
298	char	ift_name[IFNAMSIZ];	/* interface name */
299	u_long	ift_ip;			/* input packets */
300	u_long	ift_ib;			/* input bytes */
301	u_long	ift_ie;			/* input errors */
302	u_long	ift_op;			/* output packets */
303	u_long	ift_ob;			/* output bytes */
304	u_long	ift_oe;			/* output errors */
305	u_long	ift_co;			/* collisions */
306	int	ift_dr;			/* drops */
307} iftot[MAXIF];
308
309u_char	signalled;			/* set if alarm goes off "early" */
310
311/*
312 * Print a running summary of interface statistics.
313 * Repeat display every interval seconds, showing statistics
314 * collected over that interval.  Assumes that interval is non-zero.
315 * First line printed at top of screen is always cumulative.
316 */
317static void
318sidewaysintpr(interval, off)
319	unsigned interval;
320	u_long off;
321{
322	struct ifnet ifnet;
323	u_long firstifnet;
324	struct iftot *ip, *total;
325	int line;
326	struct iftot *lastif, *sum, *interesting;
327	struct ifnet_head ifhead;	/* TAILQ_HEAD */
328	int oldmask;
329
330	/*
331	 * Find the pointer to the first ifnet structure.  Replace
332	 * the pointer to the TAILQ_HEAD with the actual pointer
333	 * to the first list element.
334	 */
335	if (kread(off, (char *)&ifhead, sizeof ifhead))
336		return;
337	firstifnet = (u_long)ifhead.tqh_first;
338
339	lastif = iftot;
340	sum = iftot + MAXIF - 1;
341	total = sum - 1;
342	interesting = (interface == NULL) ? iftot : NULL;
343	for (off = firstifnet, ip = iftot; off;) {
344		if (kread(off, (char *)&ifnet, sizeof ifnet))
345			break;
346		memset(ip->ift_name, 0, sizeof(ip->ift_name));
347		snprintf(ip->ift_name, IFNAMSIZ, "%s", ifnet.if_xname);
348		if (interface && strcmp(ifnet.if_xname, interface) == 0)
349			interesting = ip;
350		ip++;
351		if (ip >= iftot + MAXIF - 2)
352			break;
353		off = (u_long)ifnet.if_list.tqe_next;
354	}
355	if (interesting == NULL) {
356		fprintf(stderr, "%s: %s: unknown interface\n",
357		    __progname, interface);
358		exit(1);
359	}
360	lastif = ip;
361
362	(void)signal(SIGALRM, catchalarm);
363	signalled = NO;
364	(void)alarm(interval);
365banner:
366	if (bflag)
367		printf("%7.7s in %8.8s %6.6s out %5.5s",
368		    interesting->ift_name, " ",
369		    interesting->ift_name, " ");
370	else
371		printf("%5.5s in %5.5s%5.5s out %5.5s %5.5s",
372		    interesting->ift_name, " ",
373		    interesting->ift_name, " ", " ");
374	if (dflag)
375		printf(" %5.5s", " ");
376	if (lastif - iftot > 0) {
377		if (bflag)
378			printf("  %7.7s in %8.8s %6.6s out %5.5s",
379			    "total", " ", "total", " ");
380		else
381			printf("  %5.5s in %5.5s%5.5s out %5.5s %5.5s",
382			    "total", " ", "total", " ", " ");
383		if (dflag)
384			printf(" %5.5s", " ");
385	}
386	for (ip = iftot; ip < iftot + MAXIF; ip++) {
387		ip->ift_ip = 0;
388		ip->ift_ib = 0;
389		ip->ift_ie = 0;
390		ip->ift_op = 0;
391		ip->ift_ob = 0;
392		ip->ift_oe = 0;
393		ip->ift_co = 0;
394		ip->ift_dr = 0;
395	}
396	putchar('\n');
397	if (bflag)
398		printf("%10.10s %8.8s %10.10s %5.5s",
399		    "bytes", " ", "bytes", " ");
400	else
401		printf("%8.8s %5.5s %8.8s %5.5s %5.5s",
402		    "packets", "errs", "packets", "errs", "colls");
403	if (dflag)
404		printf(" %5.5s", "drops");
405	if (lastif - iftot > 0) {
406		if (bflag)
407			printf("  %10.10s %8.8s %10.10s %5.5s",
408			    "bytes", " ", "bytes", " ");
409		else
410			printf("  %8.8s %5.5s %8.8s %5.5s %5.5s",
411			    "packets", "errs", "packets", "errs", "colls");
412		if (dflag)
413			printf(" %5.5s", "drops");
414	}
415	putchar('\n');
416	fflush(stdout);
417	line = 0;
418loop:
419	sum->ift_ip = 0;
420	sum->ift_ib = 0;
421	sum->ift_ie = 0;
422	sum->ift_op = 0;
423	sum->ift_ob = 0;
424	sum->ift_oe = 0;
425	sum->ift_co = 0;
426	sum->ift_dr = 0;
427	for (off = firstifnet, ip = iftot; off && ip < lastif; ip++) {
428		if (kread(off, (char *)&ifnet, sizeof ifnet)) {
429			off = 0;
430			continue;
431		}
432		if (ip == interesting) {
433			if (bflag) {
434				printf("%10lu %8.8s %10lu %5.5s",
435					ifnet.if_ibytes - ip->ift_ib, " ",
436					ifnet.if_obytes - ip->ift_ob, " ");
437			} else {
438				printf("%8lu %5lu %8lu %5lu %5lu",
439					ifnet.if_ipackets - ip->ift_ip,
440					ifnet.if_ierrors - ip->ift_ie,
441					ifnet.if_opackets - ip->ift_op,
442					ifnet.if_oerrors - ip->ift_oe,
443					ifnet.if_collisions - ip->ift_co);
444			}
445			if (dflag)
446				printf(" %5d",
447				    ifnet.if_snd.ifq_drops - ip->ift_dr);
448		}
449		ip->ift_ip = ifnet.if_ipackets;
450		ip->ift_ib = ifnet.if_ibytes;
451		ip->ift_ie = ifnet.if_ierrors;
452		ip->ift_op = ifnet.if_opackets;
453		ip->ift_ob = ifnet.if_obytes;
454		ip->ift_oe = ifnet.if_oerrors;
455		ip->ift_co = ifnet.if_collisions;
456		ip->ift_dr = ifnet.if_snd.ifq_drops;
457		sum->ift_ip += ip->ift_ip;
458		sum->ift_ib += ip->ift_ib;
459		sum->ift_ie += ip->ift_ie;
460		sum->ift_op += ip->ift_op;
461		sum->ift_ob += ip->ift_ob;
462		sum->ift_oe += ip->ift_oe;
463		sum->ift_co += ip->ift_co;
464		sum->ift_dr += ip->ift_dr;
465		off = (u_long)ifnet.if_list.tqe_next;
466	}
467	if (lastif - iftot > 0) {
468		if (bflag) {
469			printf("  %10lu %8.8s %10lu %5.5s",
470				sum->ift_ib - total->ift_ib, " ",
471				sum->ift_ob - total->ift_ob, " ");
472		} else {
473			printf("  %8lu %5lu %8lu %5lu %5lu",
474				sum->ift_ip - total->ift_ip,
475				sum->ift_ie - total->ift_ie,
476				sum->ift_op - total->ift_op,
477				sum->ift_oe - total->ift_oe,
478				sum->ift_co - total->ift_co);
479		}
480		if (dflag)
481			printf(" %5d", sum->ift_dr - total->ift_dr);
482	}
483	*total = *sum;
484	putchar('\n');
485	fflush(stdout);
486	line++;
487	oldmask = sigblock(sigmask(SIGALRM));
488	if (! signalled) {
489		sigpause(0);
490	}
491	sigsetmask(oldmask);
492	signalled = NO;
493	(void)alarm(interval);
494	if (line == 21)
495		goto banner;
496	goto loop;
497	/*NOTREACHED*/
498}
499
500/*
501 * Called if an interval expires before sidewaysintpr has completed a loop.
502 * Sets a flag to not wait for the alarm.
503 */
504static void
505catchalarm(signo)
506	int signo;
507{
508
509	signalled = YES;
510}
511