1/*	$NetBSD: main.c,v 1.105 2023/08/18 13:18:17 martin Exp $	*/
2
3/*
4 * Copyright (c) 1983, 1988, 1993
5 *	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. Neither the name of the University nor the names of its contributors
16 *    may be used to endorse or promote products derived from this software
17 *    without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32#include <sys/cdefs.h>
33#ifndef lint
34__COPYRIGHT("@(#) Copyright (c) 1983, 1988, 1993\
35 Regents of the University of California.  All rights reserved.");
36#endif /* not lint */
37
38#ifndef lint
39#if 0
40static char sccsid[] = "from: @(#)main.c	8.4 (Berkeley) 3/1/94";
41#else
42__RCSID("$NetBSD: main.c,v 1.105 2023/08/18 13:18:17 martin Exp $");
43#endif
44#endif /* not lint */
45
46#include <sys/param.h>
47#include <sys/file.h>
48#include <sys/protosw.h>
49#include <sys/socket.h>
50
51#include <net/if.h>
52#include <netinet/in.h>
53
54#include <ctype.h>
55#include <err.h>
56#include <errno.h>
57#include <kvm.h>
58#include <limits.h>
59#include <netdb.h>
60#include <nlist.h>
61#include <paths.h>
62#include <stdio.h>
63#include <stdlib.h>
64#include <string.h>
65#include <unistd.h>
66#include "netstat.h"
67#include "rtutil.h"
68#include "prog_ops.h"
69
70int	Aflag;
71int	aflag;
72int	Bflag;
73int	bflag;
74int	dflag;
75#ifndef SMALL
76int	gflag;
77#endif
78int	hflag;
79int	iflag;
80int	Lflag;
81int	lflag;
82int	mflag;
83int	numeric_addr;
84int	numeric_port;
85int	nflag;
86int	Pflag;
87int	pflag;
88int	qflag;
89int	rflag;
90int	sflag;
91int	tagflag;
92int	tflag;
93int	Vflag;
94int	vflag;
95
96char	*interface;
97
98int	af;
99int	use_sysctl;
100int	force_sysctl;
101
102struct nlist nl[] = {
103#define	N_MBSTAT	0
104	{ "_mbstat", 0, 0, 0, 0 },
105#define	N_IPSTAT	1
106	{ "_ipstat", 0, 0, 0, 0 },	/* not available via kvm */
107#define	N_TCBTABLE	2
108	{ "_tcbtable", 0, 0, 0, 0 },
109#define	N_TCPSTAT	3
110	{ "_tcpstat", 0, 0, 0, 0 },	/* not available via kvm */
111#define	N_UDBTABLE	4
112	{ "_udbtable", 0, 0, 0, 0 },
113#define	N_UDPSTAT	5
114	{ "_udpstat", 0, 0, 0, 0 },	/* not available via kvm */
115#define	N_IFNET_LIST		6
116	{ "_ifnet_list", 0, 0, 0, 0 },
117#define	N_ICMPSTAT	7
118	{ "_icmpstat", 0, 0, 0, 0 },	/* not available via kvm */
119#define	N_RTSTAT	8
120	{ "_rtstat", 0, 0, 0, 0 },
121#define	N_UNIXSW	9
122	{ "_unixsw", 0, 0, 0, 0 },
123#define N_RTREE		10
124	{ "_rt_tables", 0, 0, 0, 0 },
125#define	N_NFILE		11
126	{ "_nfile", 0, 0, 0, 0 },
127#define N_IGMPSTAT	12
128	{ "_igmpstat", 0, 0, 0, 0 },	/* not available via kvm */
129#define N_MRTPROTO	13
130	{ "_ip_mrtproto", 0, 0, 0, 0 },
131#define N_MRTSTAT	14
132	{ "_mrtstat", 0, 0, 0, 0 },
133#define N_MFCHASHTBL	15
134	{ "_mfchashtbl", 0, 0, 0, 0 },
135#define	N_MFCHASH	16
136	{ "_mfchash", 0, 0, 0, 0 },
137#define N_VIFTABLE	17
138	{ "_viftable", 0, 0, 0, 0 },
139#define N_MSIZE		18
140	{ "_msize", 0, 0, 0, 0 },
141#define N_MCLBYTES	19
142	{ "_mclbytes", 0, 0, 0, 0 },
143#define N_DDPSTAT	20
144	{ "_ddpstat", 0, 0, 0, 0 },	/* not available via kvm */
145#define N_DDPCB		21
146	{ "_ddpcb", 0, 0, 0, 0 },
147#define N_MBPOOL	22
148	{ "_mbpool", 0, 0, 0, 0 },
149#define N_MCLPOOL	23
150	{ "_mclpool", 0, 0, 0, 0 },
151#define N_IP6STAT	24
152	{ "_ip6stat", 0, 0, 0, 0 },	/* not available via kvm */
153#define N_TCP6STAT	25
154	{ "_tcp6stat", 0, 0, 0, 0 },	/* not available via kvm */
155#define N_UDP6STAT	26
156	{ "_udp6stat", 0, 0, 0, 0 },	/* not available via kvm */
157#define N_ICMP6STAT	27
158	{ "_icmp6stat", 0, 0, 0, 0 },	/* not available via kvm */
159#define N_IPSECSTAT	28
160	{ "_ipsecstat", 0, 0, 0, 0 },	/* not available via kvm */
161#define N_IPSEC6STAT	29
162	{ "_ipsec6stat", 0, 0, 0, 0 },	/* not available via kvm */
163#define N_PIM6STAT	30
164	{ "_pim6stat", 0, 0, 0, 0 },	/* not available via kvm */
165#define N_MRT6PROTO	31
166	{ "_ip6_mrtproto", 0, 0, 0, 0 },
167#define N_MRT6STAT	32
168	{ "_mrt6stat", 0, 0, 0, 0 },
169#define N_MF6CTABLE	33
170	{ "_mf6ctable", 0, 0, 0, 0 },
171#define N_MIF6TABLE	34
172	{ "_mif6table", 0, 0, 0, 0 },
173#define N_PFKEYSTAT	35
174	{ "_pfkeystat", 0, 0, 0, 0 },	/* not available via kvm */
175#define N_ARPSTAT	36
176	{ "_arpstat", 0, 0, 0, 0 },	/* not available via kvm */
177#define N_RIP6STAT	37
178	{ "_rip6stat", 0, 0, 0, 0 },	/* not available via kvm */
179#define	N_ARPINTRQ	38
180	{ "_arpintrq", 0, 0, 0, 0 },
181#define	N_ATINTRQ1	39
182	{ "_atintrq1", 0, 0, 0, 0 },
183#define	N_ATINTRQ2	40
184	{ "_atintrq2", 0, 0, 0, 0 },
185#define	N_PPPOEDISCINQ	41
186	{ "_ppoediscinq", 0, 0, 0, 0 },
187#define	N_PPPOEINQ	42
188	{ "_ppoeinq", 0, 0, 0, 0 },
189#define	N_HARDCLOCK_TICKS 43
190	{ "_hardclock_ticks", 0, 0, 0, 0 },
191#define N_PIMSTAT	44
192	{ "_pimstat", 0, 0, 0, 0 },
193#define N_CARPSTAT	45
194	{ "_carpstats", 0, 0, 0, 0 },	/* not available via kvm */
195#define N_PFSYNCSTAT	46
196	{ "_pfsyncstats", 0, 0, 0, 0},  /* not available via kvm */
197	{ "", 0, 0, 0, 0 },
198};
199
200struct protox {
201	u_char	pr_index;		/* index into nlist of cb head */
202	u_char	pr_sindex;		/* index into nlist of stat block */
203	u_char	pr_wanted;		/* 1 if wanted, 0 otherwise */
204	void	(*pr_cblocks)		/* control blocks printing routine */
205			(u_long, const char *);
206	void	(*pr_stats)		/* statistics printing routine */
207			(u_long, const char *);
208	void	(*pr_istats)	       /* per/if statistics printing routine */
209			(const char *);
210	void	(*pr_dump)		/* PCB state dump routine */
211			(u_long, const char *, u_long);
212	const char *pr_name;		/* well-known name */
213} protox[] = {
214	{ N_TCBTABLE,	N_TCPSTAT,	1,	protopr,
215	  tcp_stats,	NULL,		tcp_dump,	"tcp" },
216	{ N_UDBTABLE,	N_UDPSTAT,	1,	protopr,
217	  udp_stats,	NULL,		0,	"udp" },
218	{ -1,		N_IPSTAT,	1,	0,
219	  ip_stats,	NULL,		0,	"ip" },
220	{ -1,		N_ICMPSTAT,	1,	0,
221	  icmp_stats,	NULL,		0,	"icmp" },
222	{ -1,		N_IGMPSTAT,	1,	0,
223	  igmp_stats,	NULL,		0,	"igmp" },
224	{ -1,		N_CARPSTAT,	1,	0,
225	  carp_stats,	NULL,		0,	"carp" },
226#ifdef IPSEC
227	{ -1,		N_IPSECSTAT,	1,	0,
228	  fast_ipsec_stats, NULL,	0,	"ipsec" },
229#endif
230	{ -1,		N_PIMSTAT,	1,	0,
231	  pim_stats,	NULL,		0,	"pim" },
232	{ -1,		N_PFSYNCSTAT,  1,  0,
233	  pfsync_stats,  NULL,		0,  "pfsync" },
234	{ -1,		-1,		0,	0,
235	  0,		NULL,		0,	0 }
236};
237
238#ifdef INET6
239struct protox ip6protox[] = {
240	{ -1,		N_IP6STAT,	1,	0,
241	  ip6_stats,	ip6_ifstats,	0,	"ip6" },
242	{ -1,		N_ICMP6STAT,	1,	0,
243	  icmp6_stats,	icmp6_ifstats,	0,	"icmp6" },
244#ifdef TCP6
245	{ N_TCBTABLE,	N_TCP6STAT,	1,	ip6protopr,
246	  tcp6_stats,	NULL,		tcp6_dump,	"tcp6" },
247#else
248	{ N_TCBTABLE,	N_TCP6STAT,	1,	ip6protopr,
249	  tcp_stats,	NULL,		tcp6_dump,	"tcp6" },
250#endif
251	{ N_UDBTABLE,	N_UDP6STAT,	1,	ip6protopr,
252	  udp6_stats,	NULL,		0,	"udp6" },
253#ifdef IPSEC
254	{ -1,		N_IPSEC6STAT,	1,	0,
255	  fast_ipsec_stats, NULL,	0,	"ipsec6" },
256#endif
257	{ -1,		N_PIM6STAT,	1,	0,
258	  pim6_stats,	NULL,		0,	"pim6" },
259	{ -1,		N_RIP6STAT,	1,	0,
260	  rip6_stats,	NULL,		0,	"rip6" },
261	{ -1,		-1,		0,	0,
262	  0,		NULL,		0,	0 }
263};
264#endif
265
266struct protox arpprotox[] = {
267	{ -1,		N_ARPSTAT,	1,	0,
268	  arp_stats,	NULL,		0,	"arp" },
269	{ -1,		-1,		0,	0,
270	  0,		NULL,		0,	0 }
271};
272
273#ifdef IPSEC
274struct protox pfkeyprotox[] = {
275	{ -1,		N_PFKEYSTAT,	1,	0,
276	  pfkey_stats,	NULL,		0,	"pfkey" },
277	{ -1,		-1,		0,	0,
278	  0,		NULL,		0,	0 }
279};
280#endif
281
282#ifndef SMALL
283struct protox atalkprotox[] = {
284	{ N_DDPCB,	N_DDPSTAT,	1,	atalkprotopr,
285	  ddp_stats,	NULL,		0,	"ddp" },
286	{ -1,		-1,		0,	0,
287	  0,		NULL,		0,	NULL }
288};
289#endif
290
291struct protox *protoprotox[] = { protox,
292#ifdef INET6
293				 ip6protox,
294#endif
295				 arpprotox,
296#ifdef IPSEC
297				 pfkeyprotox,
298#endif
299#ifndef SMALL
300				 atalkprotox,
301#endif
302				 NULL };
303
304const struct softintrq {
305	const char *siq_name;
306	int siq_index;
307} softintrq[] = {
308	{ "arpintrq", N_ARPINTRQ },
309	{ "atintrq1", N_ATINTRQ1 },
310	{ "atintrq2", N_ATINTRQ2 },
311	{ "ppoediscinq", N_PPPOEDISCINQ },
312	{ "ppoeinq", N_PPPOEINQ },
313	{ NULL, -1 },
314};
315
316static void printproto(struct protox *, const char *);
317static void print_softintrq(void);
318__dead static void usage(void);
319static struct protox *name2protox(const char *);
320static struct protox *knownname(const char *);
321static void prepare(const char *, const char *, struct protox *tp);
322static kvm_t *prepare_kvmd(const char *, const char *, char *);
323
324static kvm_t *kvmd = NULL;
325gid_t egid;
326int interval;	/* repeat interval for i/f stats */
327static const char *nlistf = NULL, *memf = NULL;
328
329kvm_t *
330get_kvmd(void)
331{
332	char buf[_POSIX2_LINE_MAX];
333
334	if (kvmd != NULL)
335		return kvmd;
336	if ((kvmd = prepare_kvmd(nlistf, memf, buf)) == NULL)
337		errx(1, "kvm error: %s", buf);
338	return kvmd;
339}
340
341static kvm_t *
342prepare_kvmd(const char *nf, const char *mf, char *errbuf)
343{
344	kvm_t *k;
345
346	(void)setegid(egid);
347	k = kvm_openfiles(nf, mf, NULL, O_RDONLY, errbuf);
348	(void)setgid(getgid());
349	return k;
350}
351
352void
353prepare(const char *nf, const char *mf, struct protox *tp)
354{
355	char buf[_POSIX2_LINE_MAX];
356
357	/*
358	 * Try to figure out if we can use sysctl or not.
359	 */
360	if (nf != NULL || mf != NULL) {
361		/* Of course, we can't use sysctl with dumps. */
362		if (force_sysctl)
363			errx(EXIT_FAILURE, "can't use sysctl with dumps");
364
365		/*
366		 * If we have -M or -N, we're not dealing with live memory
367		 * or want to use kvm interface explicitly.  It is sometimes
368		 * useful to dig inside of kernel without extending
369		 * sysctl interface (i.e., without rebuilding kernel).
370		 */
371		use_sysctl = 0;
372	} else if (qflag ||
373#ifndef SMALL
374		   gflag ||
375#endif
376		   (pflag && tp->pr_sindex == N_PIMSTAT) ||
377		   Pflag) {
378		/* These flags are not yet supported via sysctl(3). */
379		use_sysctl = 0;
380	} else {
381		/* We can use sysctl(3). */
382		use_sysctl = 1;
383	}
384
385	if (force_sysctl && !use_sysctl) {
386		/* Let the user know what's about to happen. */
387		warnx("forcing sysctl usage even though it might not be "
388		    "supported");
389		use_sysctl = 1;
390	}
391
392	kvmd = prepare_kvmd(nf, mf, buf);
393
394	if (!use_sysctl) {
395
396		if (kvmd == NULL)
397			errx(1, "kvm error: %s", buf);
398		if (kvm_nlist(kvmd, nl) < 0 || nl[0].n_type == 0) {
399			if (nf)
400				errx(1, "%s: no namelist", nf);
401			else
402				errx(1, "no namelist");
403		}
404	} else
405		(void)setgid(getgid());
406}
407
408int
409main(int argc, char *argv[])
410{
411	struct protoent *p;
412	struct protox *tp;	/* for printing cblocks & stats */
413	int ch;
414	char *cp;
415	char *afname, *afnames;
416	u_long pcbaddr;
417
418	if (prog_init) {
419		if (prog_init() == -1)
420			err(1, "init failed");
421		force_sysctl = 1; /* cheap trick */
422	}
423
424	egid = getegid();
425	(void)setegid(getgid());
426	tp = NULL;
427	af = AF_UNSPEC;
428	afnames = NULL;
429	pcbaddr = 0;
430
431	while ((ch = getopt(argc, argv,
432	    "AabBdf:ghI:LliM:mN:nP:p:qrsStTuVvw:X")) != -1)
433		switch (ch) {
434		case 'A':
435			Aflag = RT_AFLAG;
436			break;
437		case 'a':
438			aflag = 1;
439			break;
440		case 'b':
441			bflag = 1;
442			break;
443		case 'B':
444			Bflag = 1;
445			break;
446		case 'd':
447			dflag = 1;
448			break;
449		case 'f':
450			afnames = optarg;
451			break;
452#ifndef SMALL
453		case 'g':
454			gflag = 1;
455			break;
456#endif
457		case 'h':
458			hflag = 1;
459			break;
460		case 'I':
461			iflag = 1;
462			interface = optarg;
463			break;
464		case 'i':
465			iflag = 1;
466			break;
467		case 'L':
468			Lflag = RT_LFLAG;
469			break;
470		case 'l':
471			lflag = 1;
472			break;
473		case 'M':
474			memf = optarg;
475			break;
476		case 'm':
477			mflag = 1;
478			break;
479		case 'N':
480			nlistf = optarg;
481			break;
482		case 'n':
483			numeric_addr = numeric_port = nflag = RT_NFLAG;
484			break;
485		case 'P':
486			errno = 0;
487			pcbaddr = strtoul(optarg, &cp, 16);
488			if (*cp != '\0' || errno == ERANGE)
489				errx(1, "invalid PCB address %s", optarg);
490			Pflag = 1;
491			break;
492		case 'p':
493			if ((tp = name2protox(optarg)) == NULL)
494				errx(1,
495				    "%s: unknown or uninstrumented protocol",
496				    optarg);
497			pflag = 1;
498			break;
499		case 'q':
500			qflag = 1;
501			break;
502		case 'r':
503			rflag = 1;
504			break;
505		case 's':
506			++sflag;
507			break;
508		case 'S':
509			numeric_addr = 1;
510			break;
511		case 't':
512			tflag = 1;
513			break;
514		case 'T':
515			tagflag = RT_TFLAG;
516			break;
517		case 'u':
518			af = AF_LOCAL;
519			break;
520		case 'V':
521			Vflag++;
522			break;
523		case 'v':
524			vflag = RT_VFLAG;
525			break;
526		case 'w':
527			interval = atoi(optarg);
528			iflag = 1;
529			break;
530		case 'X':
531			force_sysctl = 1;
532			break;
533		case '?':
534		default:
535			usage();
536		}
537	argv += optind;
538	argc -= optind;
539
540#define	BACKWARD_COMPATIBILITY
541#ifdef	BACKWARD_COMPATIBILITY
542	if (*argv) {
543		if (isdigit((unsigned char)**argv)) {
544			interval = atoi(*argv);
545			if (interval <= 0)
546				usage();
547			++argv;
548			iflag = 1;
549		}
550		if (*argv) {
551			nlistf = *argv;
552			if (*++argv)
553				memf = *argv;
554		}
555	}
556#endif
557
558	prepare(nlistf, memf, tp);
559
560#ifndef SMALL
561	if (Bflag) {
562		if (sflag)
563			nsbpf_stats();
564		else
565			nsbpf_dump(interface);
566		exit(0);
567	}
568#endif
569
570	if (mflag) {
571		mbpr(nl[N_MBSTAT].n_value,  nl[N_MSIZE].n_value,
572		    nl[N_MCLBYTES].n_value, nl[N_MBPOOL].n_value,
573		    nl[N_MCLPOOL].n_value);
574		exit(0);
575	}
576	if (Pflag) {
577		if (tp == NULL) {
578			/* Default to TCP. */
579			tp = name2protox("tcp");
580		}
581		if (tp->pr_dump)
582			(*tp->pr_dump)(nl[tp->pr_index].n_value, tp->pr_name,
583			    pcbaddr);
584		else
585			printf("%s: no PCB dump routine\n", tp->pr_name);
586		exit(0);
587	}
588	if (pflag) {
589		if (iflag && tp->pr_istats)
590			intpr(interval, nl[N_IFNET_LIST].n_value,
591			    tp->pr_istats);
592		else if (tp->pr_stats)
593			(*tp->pr_stats)(nl[tp->pr_sindex].n_value,
594				tp->pr_name);
595		else
596			printf("%s: no stats routine\n", tp->pr_name);
597		exit(0);
598	}
599	if (qflag) {
600		print_softintrq();
601		exit(0);
602	}
603	/*
604	 * Keep file descriptors open to avoid overhead
605	 * of open/close on each call to get* routines.
606	 */
607	sethostent(1);
608	setnetent(1);
609	/*
610	 * If -f was used afnames != NULL, loop over the address families.
611	 * Otherwise do this at least once (with af == AF_UNSPEC).
612	 */
613	afname = NULL;
614	do {
615		if (afnames != NULL) {
616			afname = strsep(&afnames, ",");
617			if (afname == NULL)
618				break;		/* Exit early */
619			if (strcmp(afname, "inet") == 0)
620				af = AF_INET;
621			else if (strcmp(afname, "inet6") == 0)
622				af = AF_INET6;
623			else if (strcmp(afname, "arp") == 0)
624				af = AF_ARP;
625			else if (strcmp(afname, "pfkey") == 0)
626				af = PF_KEY;
627			else if (strcmp(afname, "unix") == 0
628			    || strcmp(afname, "local") == 0)
629				af = AF_LOCAL;
630			else if (strcmp(afname, "atalk") == 0)
631				af = AF_APPLETALK;
632			else if (strcmp(afname, "mpls") == 0)
633				af = AF_MPLS;
634			else {
635				warnx("%s: unknown address family",
636				    afname);
637				continue;
638			}
639		}
640
641		if (iflag) {
642			if (af != AF_UNSPEC)
643				goto protostat;
644
645			intpr(interval, nl[N_IFNET_LIST].n_value, NULL);
646			break;
647		}
648		if (rflag) {
649			if (sflag)
650				rt_stats(use_sysctl ? 0 :
651				    nl[N_RTSTAT].n_value);
652			else {
653				if (use_sysctl)
654					p_rttables(af,
655					    nflag|tagflag|vflag|Lflag, 0, ~0);
656				else
657					routepr(nl[N_RTREE].n_value);
658			}
659			break;
660		}
661#ifndef SMALL
662		if (gflag) {
663			if (sflag) {
664				if (af == AF_INET || af == AF_UNSPEC)
665					mrt_stats(nl[N_MRTPROTO].n_value,
666						  nl[N_MRTSTAT].n_value);
667#ifdef INET6
668				if (af == AF_INET6 || af == AF_UNSPEC)
669					mrt6_stats(nl[N_MRT6PROTO].n_value,
670						   nl[N_MRT6STAT].n_value);
671#endif
672			}
673			else {
674				if (af == AF_INET || af == AF_UNSPEC)
675					mroutepr(nl[N_MRTPROTO].n_value,
676						 nl[N_MFCHASHTBL].n_value,
677						 nl[N_MFCHASH].n_value,
678						 nl[N_VIFTABLE].n_value);
679#ifdef INET6
680				if (af == AF_INET6 || af == AF_UNSPEC)
681					mroute6pr(nl[N_MRT6PROTO].n_value,
682						  nl[N_MF6CTABLE].n_value,
683						  nl[N_MIF6TABLE].n_value);
684#endif
685			}
686			break;
687		}
688#endif
689	  protostat:
690		if (af == AF_INET || af == AF_UNSPEC) {
691			setprotoent(1);
692			setservent(1);
693			/* ugh, this is O(MN) ... why do we do this? */
694			while ((p = getprotoent()) != NULL) {
695				for (tp = protox; tp->pr_name; tp++)
696					if (strcmp(tp->pr_name, p->p_name) == 0)
697						break;
698				if (tp->pr_name == 0 || tp->pr_wanted == 0)
699					continue;
700				printproto(tp, p->p_name);
701				tp->pr_wanted = 0;
702			}
703			endprotoent();
704			for (tp = protox; tp->pr_name; tp++)
705				if (tp->pr_wanted)
706					printproto(tp, tp->pr_name);
707		}
708#ifdef INET6
709		if (af == AF_INET6 || af == AF_UNSPEC)
710			for (tp = ip6protox; tp->pr_name; tp++)
711				printproto(tp, tp->pr_name);
712#endif
713		if (af == AF_ARP || af == AF_UNSPEC)
714			for (tp = arpprotox; tp->pr_name; tp++)
715				printproto(tp, tp->pr_name);
716#ifdef IPSEC
717		if (af == PF_KEY || af == AF_UNSPEC)
718			for (tp = pfkeyprotox; tp->pr_name; tp++)
719				printproto(tp, tp->pr_name);
720#endif
721#ifndef SMALL
722		if (af == AF_APPLETALK || af == AF_UNSPEC)
723			for (tp = atalkprotox; tp->pr_name; tp++)
724				printproto(tp, tp->pr_name);
725		if ((af == AF_LOCAL || af == AF_UNSPEC) && !sflag)
726			unixpr(nl[N_UNIXSW].n_value);
727#endif
728	} while (afnames != NULL && afname != NULL);
729	exit(0);
730}
731
732/*
733 * Print out protocol statistics or control blocks (per sflag).
734 * If the interface was not specifically requested, and the symbol
735 * is not in the namelist, ignore this one.
736 */
737static void
738printproto(struct protox *tp, const char *name)
739{
740	void (*pr)(u_long, const char *);
741	u_long off;
742
743	if (sflag) {
744		if (iflag) {
745			if (tp->pr_istats)
746				intpr(interval, nl[N_IFNET_LIST].n_value,
747				    tp->pr_istats);
748			return;
749		}
750		else {
751			pr = tp->pr_stats;
752			off = nl[tp->pr_sindex].n_value;
753		}
754	} else {
755		pr = tp->pr_cblocks;
756		off = nl[tp->pr_index].n_value;
757	}
758	if (pr != NULL && ((off || af != AF_UNSPEC) || use_sysctl))
759		(*pr)(off, name);
760}
761
762/*
763 * Print softintrq status.
764 */
765void
766print_softintrq(void)
767{
768	struct ifqueue intrq, *ifq = &intrq;
769	const struct softintrq *siq;
770	u_long off;
771
772	for (siq = softintrq; siq->siq_name != NULL; siq++) {
773		off = nl[siq->siq_index].n_value;
774		if (off == 0)
775			continue;
776
777		kread(off, (char *)ifq, sizeof(*ifq));
778		printf("%s:\n", siq->siq_name);
779		printf("\tqueue length: %d\n", ifq->ifq_len);
780		printf("\tmaximum queue length: %d\n", ifq->ifq_maxlen);
781		printf("\tpackets dropped: %" PRIu64 "\n", ifq->ifq_drops);
782	}
783}
784
785/*
786 * Read kernel memory, return 0 on success.
787 */
788int
789kread(u_long addr, char *buf, int size)
790{
791
792	if (kvm_read(kvmd, addr, buf, size) != size) {
793		warnx("%s", kvm_geterr(kvmd));
794		return -1;
795	}
796	return 0;
797}
798
799const char *
800plural(int n)
801{
802
803	return (n != 1 ? "s" : "");
804}
805
806const char *
807plurales(int n)
808{
809
810	return (n != 1 ? "es" : "");
811}
812
813int
814get_hardticks(void)
815{
816	int hardticks;
817
818	kread(nl[N_HARDCLOCK_TICKS].n_value, (char *)&hardticks,
819	    sizeof(hardticks));
820	return hardticks;
821}
822
823/*
824 * Find the protox for the given "well-known" name.
825 */
826static struct protox *
827knownname(const char *name)
828{
829	struct protox **tpp, *tp;
830
831	for (tpp = protoprotox; *tpp; tpp++)
832		for (tp = *tpp; tp->pr_name; tp++)
833			if (strcmp(tp->pr_name, name) == 0)
834				return tp;
835	return NULL;
836}
837
838/*
839 * Find the protox corresponding to name.
840 */
841static struct protox *
842name2protox(const char *name)
843{
844	struct protox *tp;
845	char **alias;			/* alias from p->aliases */
846	struct protoent *p;
847
848	/*
849	 * Try to find the name in the list of "well-known" names. If that
850	 * fails, check if name is an alias for an Internet protocol.
851	 */
852	if ((tp = knownname(name)) != NULL)
853		return tp;
854
855	setprotoent(1);			/* make protocol lookup cheaper */
856	while ((p = getprotoent()) != NULL) {
857		/* assert: name not same as p->name */
858		for (alias = p->p_aliases; *alias; alias++)
859			if (strcmp(name, *alias) == 0) {
860				endprotoent();
861				return knownname(p->p_name);
862			}
863	}
864	endprotoent();
865	return NULL;
866}
867
868static void
869usage(void)
870{
871	const char *progname = getprogname();
872
873	(void)fprintf(stderr,
874"usage: %s [-Aan] [-f address_family[,family ...]] [-M core] [-N system]\n", progname);
875	(void)fprintf(stderr,
876"       %s [-bdgiLmnqrsSv] [-f address_family[,family ...]] [-M core] [-N system]\n",
877	progname);
878	(void)fprintf(stderr,
879"       %s [-dn] [-I interface] [-M core] [-N system] [-w wait]\n", progname);
880	(void)fprintf(stderr,
881"       %s [-p protocol] [-M core] [-N system]\n", progname);
882	(void)fprintf(stderr,
883"       %s [-p protocol] [-M core] [-N system] -P pcbaddr\n", progname);
884	(void)fprintf(stderr,
885"       %s [-p protocol] [-i] [-I Interface] \n", progname);
886	(void)fprintf(stderr,
887"       %s [-s] [-f address_family[,family ...]] [-i] [-I Interface]\n", progname);
888	(void)fprintf(stderr,
889"       %s [-s] [-B] [-I interface]\n", progname);
890	exit(1);
891}
892