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source: rtems-libbsd/freebsd/usr.bin/netstat/if.c @ ce96623

4.1155-freebsd-126-freebsd-12freebsd-9.3

Last change on this file since ce96623 was 0a57e1d, checked in by Sebastian Huber <sebastian.huber@…>, on 11/06/13 at 08:35:05
Reduce divergence from FreeBSD sources
Property mode set to `100644`
File size: 19.5 KB

Line
1	#include <machine/rtems-bsd-user-space.h>
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	#if 0
37	#ifndef lint
38	static char sccsid[] = "@(#)if.c 8.3 (Berkeley) 4/28/95";
39	#endif /* not lint */
40	#endif
41
42	#ifdef __rtems__
43	#include <machine/rtems-bsd-program.h>
44	#endif /* __rtems__ */
45	#include <sys/cdefs.h>
46	__FBSDID("$FreeBSD$");
47
48	#include <rtems/bsd/sys/types.h>
49	#include <sys/protosw.h>
50	#include <sys/socket.h>
51	#include <sys/socketvar.h>
52	#include <sys/sysctl.h>
53	#include <rtems/bsd/sys/time.h>
54
55	#include <net/if.h>
56	#include <net/if_var.h>
57	#include <net/if_dl.h>
58	#include <net/if_types.h>
59	#include <net/ethernet.h>
60	#include <net/pfvar.h>
61	#include <net/if_pfsync.h>
62	#include <netinet/in.h>
63	#include <netinet/in_var.h>
64	#ifndef __rtems__
65	#include <netipx/ipx.h>
66	#include <netipx/ipx_if.h>
67	#endif /* __rtems__ */
68	#include <arpa/inet.h>
69
70	#include <err.h>
71	#include <errno.h>
72	#include <libutil.h>
73	#ifdef INET6
74	#include <netdb.h>
75	#endif
76	#include <signal.h>
77	#include <stdint.h>
78	#include <stdio.h>
79	#include <stdlib.h>
80	#include <string.h>
81	#include <unistd.h>
82
83	#include "netstat.h"
84
85	#define YES 1
86	#define NO 0
87
88	static void sidewaysintpr(int, u_long);
89	static void catchalarm(int);
90
91	#ifdef INET6
92	static char addr_buf[NI_MAXHOST]; /* for getnameinfo() */
93	#endif
94
95	/*
96	* Dump pfsync statistics structure.
97	*/
98	void
99	pfsync_stats(u_long off, const char *name, int af1 __unused, int proto __unused)
100	{
101	struct pfsyncstats pfsyncstat, zerostat;
102	size_t len = sizeof(struct pfsyncstats);
103
104	if (live) {
105	if (zflag)
106	memset(&zerostat, 0, len);
107	if (sysctlbyname("net.inet.pfsync.stats", &pfsyncstat, &len,
108	zflag ? &zerostat : NULL, zflag ? len : 0) < 0) {
109	if (errno != ENOENT)
110	warn("sysctl: net.inet.pfsync.stats");
111	return;
112	}
113	} else
114	kread(off, &pfsyncstat, len);
115
116	printf("%s:\n", name);
117
118	#define p(f, m) if (pfsyncstat.f \|\| sflag <= 1) \
119	printf(m, (uintmax_t)pfsyncstat.f, plural(pfsyncstat.f))
120	#define p2(f, m) if (pfsyncstat.f \|\| sflag <= 1) \
121	printf(m, (uintmax_t)pfsyncstat.f)
122
123	p(pfsyncs_ipackets, "\t%ju packet%s received (IPv4)\n");
124	p(pfsyncs_ipackets6, "\t%ju packet%s received (IPv6)\n");
125	p(pfsyncs_badif, "\t\t%ju packet%s discarded for bad interface\n");
126	p(pfsyncs_badttl, "\t\t%ju packet%s discarded for bad ttl\n");
127	p(pfsyncs_hdrops, "\t\t%ju packet%s shorter than header\n");
128	p(pfsyncs_badver, "\t\t%ju packet%s discarded for bad version\n");
129	p(pfsyncs_badauth, "\t\t%ju packet%s discarded for bad HMAC\n");
130	p(pfsyncs_badact,"\t\t%ju packet%s discarded for bad action\n");
131	p(pfsyncs_badlen, "\t\t%ju packet%s discarded for short packet\n");
132	p(pfsyncs_badval, "\t\t%ju state%s discarded for bad values\n");
133	p(pfsyncs_stale, "\t\t%ju stale state%s\n");
134	p(pfsyncs_badstate, "\t\t%ju failed state lookup/insert%s\n");
135	p(pfsyncs_opackets, "\t%ju packet%s sent (IPv4)\n");
136	p(pfsyncs_opackets6, "\t%ju packet%s sent (IPv6)\n");
137	p2(pfsyncs_onomem, "\t\t%ju send failed due to mbuf memory error\n");
138	p2(pfsyncs_oerrors, "\t\t%ju send error\n");
139	#undef p
140	#undef p2
141	}
142
143	/*
144	* Display a formatted value, or a '-' in the same space.
145	*/
146	static void
147	show_stat(const char *fmt, int width, u_long value, short showvalue)
148	{
149	const char lsep, rsep;
150	char newfmt[32];
151
152	lsep = "";
153	if (strncmp(fmt, "LS", 2) == 0) {
154	lsep = " ";
155	fmt += 2;
156	}
157	rsep = " ";
158	if (strncmp(fmt, "NRS", 3) == 0) {
159	rsep = "";
160	fmt += 3;
161	}
162	if (showvalue == 0) {
163	/* Print just dash. */
164	sprintf(newfmt, "%s%%%ds%s", lsep, width, rsep);
165	printf(newfmt, "-");
166	return;
167	}
168
169	if (hflag) {
170	char buf[5];
171
172	/* Format in human readable form. */
173	humanize_number(buf, sizeof(buf), (int64_t)value, "",
174	HN_AUTOSCALE, HN_NOSPACE \| HN_DECIMAL);
175	sprintf(newfmt, "%s%%%ds%s", lsep, width, rsep);
176	printf(newfmt, buf);
177	} else {
178	/* Construct the format string. */
179	sprintf(newfmt, "%s%%%d%s%s", lsep, width, fmt, rsep);
180	printf(newfmt, value);
181	}
182	}
183
184	/*
185	* Print a description of the network interfaces.
186	*/
187	void
188	intpr(int interval1, u_long ifnetaddr, void (pfunc)(char ))
189	{
190	struct ifnet ifnet;
191	struct ifnethead ifnethead;
192	union {
193	struct ifaddr ifa;
194	struct in_ifaddr in;
195	#ifdef INET6
196	struct in6_ifaddr in6;
197	#endif
198	#ifndef __rtems__
199	struct ipx_ifaddr ipx;
200	#endif /* __rtems__ */
201	} ifaddr;
202	u_long ifaddraddr;
203	u_long ifaddrfound;
204	u_long opackets;
205	u_long ipackets;
206	u_long obytes;
207	u_long ibytes;
208	u_long omcasts;
209	u_long imcasts;
210	u_long oerrors;
211	u_long ierrors;
212	u_long idrops;
213	u_long collisions;
214	short timer;
215	int drops;
216	struct sockaddr *sa = NULL;
217	char name[IFNAMSIZ];
218	short network_layer;
219	short link_layer;
220
221	if (ifnetaddr == 0) {
222	printf("ifnet: symbol not defined\n");
223	return;
224	}
225	if (interval1) {
226	sidewaysintpr(interval1, ifnetaddr);
227	return;
228	}
229	if (kread(ifnetaddr, (char *)&ifnethead, sizeof ifnethead) != 0)
230	return;
231	ifnetaddr = (u_long)TAILQ_FIRST(&ifnethead);
232	if (kread(ifnetaddr, (char *)&ifnet, sizeof ifnet) != 0)
233	return;
234
235	if (!pfunc) {
236	if (Wflag)
237	printf("%-7.7s", "Name");
238	else
239	printf("%-5.5s", "Name");
240	printf(" %5.5s %-13.13s %-17.17s %8.8s %5.5s %5.5s",
241	"Mtu", "Network", "Address", "Ipkts", "Ierrs", "Idrop");
242	if (bflag)
243	printf(" %10.10s","Ibytes");
244	printf(" %8.8s %5.5s", "Opkts", "Oerrs");
245	if (bflag)
246	printf(" %10.10s","Obytes");
247	printf(" %5s", "Coll");
248	if (tflag)
249	printf(" %s", "Time");
250	if (dflag)
251	printf(" %s", "Drop");
252	putchar('\n');
253	}
254	ifaddraddr = 0;
255	while (ifnetaddr \|\| ifaddraddr) {
256	struct sockaddr_in *sockin;
257	#ifdef INET6
258	struct sockaddr_in6 *sockin6;
259	#endif
260	char *cp;
261	int n, m;
262
263	network_layer = 0;
264	link_layer = 0;
265
266	if (ifaddraddr == 0) {
267	if (kread(ifnetaddr, (char *)&ifnet, sizeof ifnet) != 0)
268	return;
269	strlcpy(name, ifnet.if_xname, sizeof(name));
270	ifnetaddr = (u_long)TAILQ_NEXT(&ifnet, if_link);
271	if (interface != 0 && strcmp(name, interface) != 0)
272	continue;
273	cp = index(name, '\0');
274
275	if (pfunc) {
276	(*pfunc)(name);
277	continue;
278	}
279
280	if ((ifnet.if_flags&IFF_UP) == 0)
281	cp++ = '';
282	*cp = '\0';
283	ifaddraddr = (u_long)TAILQ_FIRST(&ifnet.if_addrhead);
284	}
285	ifaddrfound = ifaddraddr;
286
287	/*
288	* Get the interface stats. These may get
289	* overriden below on a per-interface basis.
290	*/
291	opackets = ifnet.if_opackets;
292	ipackets = ifnet.if_ipackets;
293	obytes = ifnet.if_obytes;
294	ibytes = ifnet.if_ibytes;
295	omcasts = ifnet.if_omcasts;
296	imcasts = ifnet.if_imcasts;
297	oerrors = ifnet.if_oerrors;
298	ierrors = ifnet.if_ierrors;
299	idrops = ifnet.if_iqdrops;
300	collisions = ifnet.if_collisions;
301	timer = ifnet.if_timer;
302	drops = ifnet.if_snd.ifq_drops;
303
304	if (ifaddraddr == 0) {
305	if (Wflag)
306	printf("%-7.7s", name);
307	else
308	printf("%-5.5s", name);
309	printf(" %5lu ", ifnet.if_mtu);
310	printf("%-13.13s ", "none");
311	printf("%-17.17s ", "none");
312	} else {
313	if (kread(ifaddraddr, (char *)&ifaddr, sizeof ifaddr)
314	!= 0) {
315	ifaddraddr = 0;
316	continue;
317	}
318	#define CP(x) ((char *)(x))
319	cp = (CP(ifaddr.ifa.ifa_addr) - CP(ifaddraddr)) +
320	CP(&ifaddr);
321	sa = (struct sockaddr *)cp;
322	if (af != AF_UNSPEC && sa->sa_family != af) {
323	ifaddraddr =
324	(u_long)TAILQ_NEXT(&ifaddr.ifa, ifa_link);
325	continue;
326	}
327	if (Wflag)
328	printf("%-7.7s", name);
329	else
330	printf("%-5.5s", name);
331	printf(" %5lu ", ifnet.if_mtu);
332	switch (sa->sa_family) {
333	case AF_UNSPEC:
334	printf("%-13.13s ", "none");
335	printf("%-15.15s ", "none");
336	break;
337	case AF_INET:
338	sockin = (struct sockaddr_in *)sa;
339	#ifdef notdef
340	/* can't use inet_makeaddr because kernel
341	* keeps nets unshifted.
342	*/
343	in = inet_makeaddr(ifaddr.in.ia_subnet,
344	INADDR_ANY);
345	printf("%-13.13s ", netname(in.s_addr,
346	ifaddr.in.ia_subnetmask));
347	#else
348	printf("%-13.13s ",
349	netname(htonl(ifaddr.in.ia_subnet),
350	ifaddr.in.ia_subnetmask));
351	#endif
352	printf("%-17.17s ",
353	routename(sockin->sin_addr.s_addr));
354
355	network_layer = 1;
356	break;
357	#ifdef INET6
358	case AF_INET6:
359	sockin6 = (struct sockaddr_in6 *)sa;
360	in6_fillscopeid(&ifaddr.in6.ia_addr);
361	printf("%-13.13s ",
362	netname6(&ifaddr.in6.ia_addr,
363	&ifaddr.in6.ia_prefixmask.sin6_addr));
364	in6_fillscopeid(sockin6);
365	getnameinfo(sa, sa->sa_len, addr_buf,
366	sizeof(addr_buf), 0, 0, NI_NUMERICHOST);
367	printf("%-17.17s ", addr_buf);
368
369	network_layer = 1;
370	break;
371	#endif /INET6/
372	#ifndef __rtems__
373	case AF_IPX:
374	{
375	struct sockaddr_ipx *sipx =
376	(struct sockaddr_ipx *)sa;
377	u_long net;
378	char netnum[10];
379
380	(union ipx_net ) &net = sipx->sipx_addr.x_net;
381	sprintf(netnum, "%lx", (u_long)ntohl(net));
382	printf("ipx:%-8s ", netnum);
383	/* printf("ipx:%-8s ", netname(net, 0L)); */
384	printf("%-17s ",
385	ipx_phost((struct sockaddr *)sipx));
386	}
387
388	network_layer = 1;
389	break;
390	#endif /* __rtems__ */
391
392	#ifndef __rtems__
393	case AF_APPLETALK:
394	printf("atalk:%-12.12s ",atalk_print(sa,0x10) );
395	printf("%-11.11s ",atalk_print(sa,0x0b) );
396	break;
397	#endif /* __rtems__ */
398	case AF_LINK:
399	{
400	struct sockaddr_dl *sdl =
401	(struct sockaddr_dl *)sa;
402	char linknum[10];
403	cp = (char *)LLADDR(sdl);
404	n = sdl->sdl_alen;
405	sprintf(linknum, "<Link#%d>", sdl->sdl_index);
406	m = printf("%-13.13s ", linknum);
407	}
408	goto hexprint;
409	default:
410	m = printf("(%d)", sa->sa_family);
411	for (cp = sa->sa_len + (char *)sa;
412	--cp > sa->sa_data && (*cp == 0);) {}
413	n = cp - sa->sa_data + 1;
414	cp = sa->sa_data;
415	hexprint:
416	while ((--n >= 0) && (m < 30))
417	m += printf("%02x%c", *cp++ & 0xff,
418	n > 0 ? ':' : ' ');
419	m = 32 - m;
420	while (m-- > 0)
421	putchar(' ');
422
423	link_layer = 1;
424	break;
425	}
426
427	/*
428	* Fixup the statistics for interfaces that
429	* update stats for their network addresses
430	*/
431	if (network_layer) {
432	opackets = ifaddr.in.ia_ifa.if_opackets;
433	ipackets = ifaddr.in.ia_ifa.if_ipackets;
434	obytes = ifaddr.in.ia_ifa.if_obytes;
435	ibytes = ifaddr.in.ia_ifa.if_ibytes;
436	}
437
438	ifaddraddr = (u_long)TAILQ_NEXT(&ifaddr.ifa, ifa_link);
439	}
440
441	show_stat("lu", 8, ipackets, link_layer\|network_layer);
442	show_stat("lu", 5, ierrors, link_layer);
443	show_stat("lu", 5, idrops, link_layer);
444	if (bflag)
445	show_stat("lu", 10, ibytes, link_layer\|network_layer);
446
447	show_stat("lu", 8, opackets, link_layer\|network_layer);
448	show_stat("lu", 5, oerrors, link_layer);
449	if (bflag)
450	show_stat("lu", 10, obytes, link_layer\|network_layer);
451
452	show_stat("NRSlu", 5, collisions, link_layer);
453	if (tflag)
454	show_stat("LSd", 4, timer, link_layer);
455	if (dflag)
456	show_stat("LSd", 4, drops, link_layer);
457	putchar('\n');
458
459	if (aflag && ifaddrfound) {
460	/*
461	* Print family's multicast addresses
462	*/
463	struct ifmultiaddr *multiaddr;
464	struct ifmultiaddr ifma;
465	union {
466	struct sockaddr sa;
467	struct sockaddr_in in;
468	#ifdef INET6
469	struct sockaddr_in6 in6;
470	#endif /* INET6 */
471	struct sockaddr_dl dl;
472	} msa;
473	const char *fmt;
474
475	TAILQ_FOREACH(multiaddr, &ifnet.if_multiaddrs, ifma_link) {
476	if (kread((u_long)multiaddr, (char *)&ifma,
477	sizeof ifma) != 0)
478	break;
479	multiaddr = &ifma;
480	if (kread((u_long)ifma.ifma_addr, (char *)&msa,
481	sizeof msa) != 0)
482	break;
483	if (msa.sa.sa_family != sa->sa_family)
484	continue;
485
486	fmt = 0;
487	switch (msa.sa.sa_family) {
488	case AF_INET:
489	fmt = routename(msa.in.sin_addr.s_addr);
490	break;
491	#ifdef INET6
492	case AF_INET6:
493	in6_fillscopeid(&msa.in6);
494	getnameinfo(&msa.sa, msa.sa.sa_len,
495	addr_buf, sizeof(addr_buf), 0, 0,
496	NI_NUMERICHOST);
497	printf("%*s %-19.19s(refs: %d)\n",
498	Wflag ? 27 : 25, "",
499	addr_buf, ifma.ifma_refcount);
500	break;
501	#endif /* INET6 */
502	case AF_LINK:
503	switch (msa.dl.sdl_type) {
504	case IFT_ETHER:
505	case IFT_FDDI:
506	fmt = ether_ntoa(
507	(struct ether_addr *)
508	LLADDR(&msa.dl));
509	break;
510	}
511	break;
512	}
513	if (fmt) {
514	printf("%*s %-17.17s",
515	Wflag ? 27 : 25, "", fmt);
516	if (msa.sa.sa_family == AF_LINK) {
517	printf(" %8lu", imcasts);
518	printf("%*s",
519	bflag ? 17 : 6, "");
520	printf(" %8lu", omcasts);
521	}
522	putchar('\n');
523	}
524	}
525	}
526	}
527	}
528
529	struct iftot {
530	SLIST_ENTRY(iftot) chain;
531	char ift_name[IFNAMSIZ]; /* interface name */
532	u_long ift_ip; /* input packets */
533	u_long ift_ie; /* input errors */
534	u_long ift_id; /* input drops */
535	u_long ift_op; /* output packets */
536	u_long ift_oe; /* output errors */
537	u_long ift_co; /* collisions */
538	u_int ift_dr; /* drops */
539	u_long ift_ib; /* input bytes */
540	u_long ift_ob; /* output bytes */
541	};
542
543	u_char signalled; /* set if alarm goes off "early" */
544
545	/*
546	* Print a running summary of interface statistics.
547	* Repeat display every interval1 seconds, showing statistics
548	* collected over that interval. Assumes that interval1 is non-zero.
549	* First line printed at top of screen is always cumulative.
550	* XXX - should be rewritten to use ifmib(4).
551	*/
552	static void
553	sidewaysintpr(int interval1, u_long off)
554	{
555	struct ifnet ifnet;
556	u_long firstifnet;
557	struct ifnethead ifnethead;
558	struct itimerval interval_it;
559	struct iftot iftot, ip, ipn, total, sum, interesting;
560	int line;
561	int oldmask, first;
562	u_long interesting_off;
563
564	if (kread(off, (char *)&ifnethead, sizeof ifnethead) != 0)
565	return;
566	firstifnet = (u_long)TAILQ_FIRST(&ifnethead);
567
568	if ((iftot = malloc(sizeof(struct iftot))) == NULL) {
569	printf("malloc failed\n");
570	exit(1);
571	}
572	memset(iftot, 0, sizeof(struct iftot));
573
574	interesting = NULL;
575	interesting_off = 0;
576	for (off = firstifnet, ip = iftot; off;) {
577	char name[IFNAMSIZ];
578
579	if (kread(off, (char *)&ifnet, sizeof ifnet) != 0)
580	break;
581	strlcpy(name, ifnet.if_xname, sizeof(name));
582	if (interface && strcmp(name, interface) == 0) {
583	interesting = ip;
584	interesting_off = off;
585	}
586	snprintf(ip->ift_name, sizeof(ip->ift_name), "(%s)", name);;
587	if ((ipn = malloc(sizeof(struct iftot))) == NULL) {
588	printf("malloc failed\n");
589	exit(1);
590	}
591	memset(ipn, 0, sizeof(struct iftot));
592	SLIST_NEXT(ip, chain) = ipn;
593	ip = ipn;
594	off = (u_long)TAILQ_NEXT(&ifnet, if_link);
595	}
596	if (interface && interesting == NULL)
597	errx(1, "%s: unknown interface", interface);
598	if ((total = malloc(sizeof(struct iftot))) == NULL) {
599	printf("malloc failed\n");
600	exit(1);
601	}
602	memset(total, 0, sizeof(struct iftot));
603	if ((sum = malloc(sizeof(struct iftot))) == NULL) {
604	printf("malloc failed\n");
605	exit(1);
606	}
607	memset(sum, 0, sizeof(struct iftot));
608
609	(void)signal(SIGALRM, catchalarm);
610	signalled = NO;
611	interval_it.it_interval.tv_sec = interval1;
612	interval_it.it_interval.tv_usec = 0;
613	interval_it.it_value = interval_it.it_interval;
614	setitimer(ITIMER_REAL, &interval_it, NULL);
615	first = 1;
616	banner:
617	printf("%17s %14s %16s", "input",
618	interesting ? interesting->ift_name : "(Total)", "output");
619	putchar('\n');
620	printf("%10s %5s %5s %10s %10s %5s %10s %5s",
621	"packets", "errs", "idrops", "bytes", "packets", "errs", "bytes",
622	"colls");
623	if (dflag)
624	printf(" %5.5s", "drops");
625	putchar('\n');
626	fflush(stdout);
627	line = 0;
628	loop:
629	if (interesting != NULL) {
630	ip = interesting;
631	if (kread(interesting_off, (char *)&ifnet, sizeof ifnet) != 0) {
632	printf("???\n");
633	exit(1);
634	};
635	if (!first) {
636	show_stat("lu", 10, ifnet.if_ipackets - ip->ift_ip, 1);
637	show_stat("lu", 5, ifnet.if_ierrors - ip->ift_ie, 1);
638	show_stat("lu", 5, ifnet.if_iqdrops - ip->ift_id, 1);
639	show_stat("lu", 10, ifnet.if_ibytes - ip->ift_ib, 1);
640	show_stat("lu", 10, ifnet.if_opackets - ip->ift_op, 1);
641	show_stat("lu", 5, ifnet.if_oerrors - ip->ift_oe, 1);
642	show_stat("lu", 10, ifnet.if_obytes - ip->ift_ob, 1);
643	show_stat("NRSlu", 5,
644	ifnet.if_collisions - ip->ift_co, 1);
645	if (dflag)
646	show_stat("LSu", 5,
647	ifnet.if_snd.ifq_drops - ip->ift_dr, 1);
648	}
649	ip->ift_ip = ifnet.if_ipackets;
650	ip->ift_ie = ifnet.if_ierrors;
651	ip->ift_id = ifnet.if_iqdrops;
652	ip->ift_ib = ifnet.if_ibytes;
653	ip->ift_op = ifnet.if_opackets;
654	ip->ift_oe = ifnet.if_oerrors;
655	ip->ift_ob = ifnet.if_obytes;
656	ip->ift_co = ifnet.if_collisions;
657	ip->ift_dr = ifnet.if_snd.ifq_drops;
658	} else {
659	sum->ift_ip = 0;
660	sum->ift_ie = 0;
661	sum->ift_id = 0;
662	sum->ift_ib = 0;
663	sum->ift_op = 0;
664	sum->ift_oe = 0;
665	sum->ift_ob = 0;
666	sum->ift_co = 0;
667	sum->ift_dr = 0;
668	for (off = firstifnet, ip = iftot;
669	off && SLIST_NEXT(ip, chain) != NULL;
670	ip = SLIST_NEXT(ip, chain)) {
671	if (kread(off, (char *)&ifnet, sizeof ifnet) != 0) {
672	off = 0;
673	continue;
674	}
675	sum->ift_ip += ifnet.if_ipackets;
676	sum->ift_ie += ifnet.if_ierrors;
677	sum->ift_id += ifnet.if_iqdrops;
678	sum->ift_ib += ifnet.if_ibytes;
679	sum->ift_op += ifnet.if_opackets;
680	sum->ift_oe += ifnet.if_oerrors;
681	sum->ift_ob += ifnet.if_obytes;
682	sum->ift_co += ifnet.if_collisions;
683	sum->ift_dr += ifnet.if_snd.ifq_drops;
684	off = (u_long)TAILQ_NEXT(&ifnet, if_link);
685	}
686	if (!first) {
687	show_stat("lu", 10, sum->ift_ip - total->ift_ip, 1);
688	show_stat("lu", 5, sum->ift_ie - total->ift_ie, 1);
689	show_stat("lu", 5, sum->ift_id - total->ift_id, 1);
690	show_stat("lu", 10, sum->ift_ib - total->ift_ib, 1);
691	show_stat("lu", 10, sum->ift_op - total->ift_op, 1);
692	show_stat("lu", 5, sum->ift_oe - total->ift_oe, 1);
693	show_stat("lu", 10, sum->ift_ob - total->ift_ob, 1);
694	show_stat("NRSlu", 5, sum->ift_co - total->ift_co, 1);
695	if (dflag)
696	show_stat("LSu", 5,
697	sum->ift_dr - total->ift_dr, 1);
698	}
699	total = sum;
700	}
701	if (!first)
702	putchar('\n');
703	fflush(stdout);
704	if ((noutputs != 0) && (--noutputs == 0))
705	exit(0);
706	#ifdef __rtems__
707	{
708	sigset_t oldmask, desired, empty;
709
710	sigemptyset(&empty);
711	sigemptyset(&desired);
712	sigaddset(&desired, SIGALRM);
713	sigprocmask(SIG_BLOCK, &desired, &oldmask);
714	while (!signalled)
715	sigsuspend(&desired);
716	signalled = NO;
717	sigprocmask(SIG_SETMASK, &oldmask, NULL);
718	}
719	#else /* __rtems__ */
720	oldmask = sigblock(sigmask(SIGALRM));
721	while (!signalled)
722	sigpause(0);
723	signalled = NO;
724	sigsetmask(oldmask);
725	#endif /* __rtems__ */
726	line++;
727	first = 0;
728	if (line == 21)
729	goto banner;
730	else
731	goto loop;
732	/NOTREACHED/
733	}
734
735	/*
736	* Set a flag to indicate that a signal from the periodic itimer has been
737	* caught.
738	*/
739	static void
740	catchalarm(int signo __unused)
741	{
742	signalled = YES;
743	}

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