main.c revision 1590 
1/*
2 * Copyright (c) 1983, 1988, 1993
3 *	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
35char copyright[] =
36"@(#) Copyright (c) 1983, 1988, 1993\n\
37	Regents of the University of California.  All rights reserved.\n";
38#endif /* not lint */
39
40#ifndef lint
41static char sccsid[] = "@(#)main.c	8.4 (Berkeley) 3/1/94";
42#endif /* not lint */
43
44#include <sys/param.h>
45#include <sys/file.h>
46#include <sys/protosw.h>
47#include <sys/socket.h>
48
49#include <netinet/in.h>
50
51#include <ctype.h>
52#include <errno.h>
53#include <kvm.h>
54#include <limits.h>
55#include <netdb.h>
56#include <nlist.h>
57#include <paths.h>
58#include <stdio.h>
59#include <stdlib.h>
60#include <string.h>
61#include <unistd.h>
62#include "netstat.h"
63
64struct nlist nl[] = {
65#define	N_MBSTAT	0
66	{ "_mbstat" },
67#define	N_IPSTAT	1
68	{ "_ipstat" },
69#define	N_TCB		2
70	{ "_tcb" },
71#define	N_TCPSTAT	3
72	{ "_tcpstat" },
73#define	N_UDB		4
74	{ "_udb" },
75#define	N_UDPSTAT	5
76	{ "_udpstat" },
77#define	N_IFNET		6
78	{ "_ifnet" },
79#define	N_IMP		7
80	{ "_imp_softc" },
81#define	N_ICMPSTAT	8
82	{ "_icmpstat" },
83#define	N_RTSTAT	9
84	{ "_rtstat" },
85#define	N_UNIXSW	10
86	{ "_unixsw" },
87#define N_IDP		11
88	{ "_nspcb"},
89#define N_IDPSTAT	12
90	{ "_idpstat"},
91#define N_SPPSTAT	13
92	{ "_spp_istat"},
93#define N_NSERR		14
94	{ "_ns_errstat"},
95#define	N_CLNPSTAT	15
96	{ "_clnp_stat"},
97#define	IN_NOTUSED	16
98	{ "_tp_inpcb" },
99#define	ISO_TP		17
100	{ "_tp_refinfo" },
101#define	N_TPSTAT	18
102	{ "_tp_stat" },
103#define	N_ESISSTAT	19
104	{ "_esis_stat"},
105#define N_NIMP		20
106	{ "_nimp"},
107#define N_RTREE		21
108	{ "_rt_tables"},
109#define N_CLTP		22
110	{ "_cltb"},
111#define N_CLTPSTAT	23
112	{ "_cltpstat"},
113#define	N_NFILE		24
114	{ "_nfile" },
115#define	N_FILE		25
116	{ "_file" },
117#define N_IGMPSTAT	26
118	{ "_igmpstat" },
119#define N_MRTPROTO	27
120	{ "_ip_mrtproto" },
121#define N_MRTSTAT	28
122	{ "_mrtstat" },
123#define N_MRTTABLE	29
124	{ "_mrttable" },
125#define N_VIFTABLE	30
126	{ "_viftable" },
127	"",
128};
129
130struct protox {
131	u_char	pr_index;		/* index into nlist of cb head */
132	u_char	pr_sindex;		/* index into nlist of stat block */
133	u_char	pr_wanted;		/* 1 if wanted, 0 otherwise */
134	void	(*pr_cblocks)();	/* control blocks printing routine */
135	void	(*pr_stats)();		/* statistics printing routine */
136	char	*pr_name;		/* well-known name */
137} protox[] = {
138	{ N_TCB,	N_TCPSTAT,	1,	protopr,
139	  tcp_stats,	"tcp" },
140	{ N_UDB,	N_UDPSTAT,	1,	protopr,
141	  udp_stats,	"udp" },
142	{ -1,		N_IPSTAT,	1,	0,
143	  ip_stats,	"ip" },
144	{ -1,		N_ICMPSTAT,	1,	0,
145	  icmp_stats,	"icmp" },
146	{ -1,		N_IGMPSTAT,	1,	0,
147	  igmp_stats,	"igmp" },
148	{ -1,		-1,		0,	0,
149	  0,		0 }
150};
151
152struct protox nsprotox[] = {
153	{ N_IDP,	N_IDPSTAT,	1,	nsprotopr,
154	  idp_stats,	"idp" },
155	{ N_IDP,	N_SPPSTAT,	1,	nsprotopr,
156	  spp_stats,	"spp" },
157	{ -1,		N_NSERR,	1,	0,
158	  nserr_stats,	"ns_err" },
159	{ -1,		-1,		0,	0,
160	  0,		0 }
161};
162
163struct protox isoprotox[] = {
164	{ ISO_TP,	N_TPSTAT,	1,	iso_protopr,
165	  tp_stats,	"tp" },
166	{ N_CLTP,	N_CLTPSTAT,	1,	iso_protopr,
167	  cltp_stats,	"cltp" },
168	{ -1,		N_CLNPSTAT,	1,	 0,
169	  clnp_stats,	"clnp"},
170	{ -1,		N_ESISSTAT,	1,	 0,
171	  esis_stats,	"esis"},
172	{ -1,		-1,		0,	0,
173	  0,		0 }
174};
175
176struct protox *protoprotox[] = { protox, nsprotox, isoprotox, NULL };
177
178static void printproto __P((struct protox *, char *));
179static void usage __P((void));
180static struct protox *name2protox __P((char *));
181static struct protox *knownname __P((char *));
182
183kvm_t *kvmd;
184
185int
186main(argc, argv)
187	int argc;
188	char *argv[];
189{
190	extern char *optarg;
191	extern int optind;
192	register struct protoent *p;
193	register struct protox *tp;	/* for printing cblocks & stats */
194	register char *cp;
195	int ch;
196	char *nlistf = NULL, *memf = NULL;
197	char buf[_POSIX2_LINE_MAX];
198
199	if (cp = rindex(argv[0], '/'))
200		prog = cp + 1;
201	else
202		prog = argv[0];
203	af = AF_UNSPEC;
204
205	while ((ch = getopt(argc, argv, "Aadf:ghI:iM:mN:np:rstuw:")) != EOF)
206		switch(ch) {
207		case 'A':
208			Aflag = 1;
209			break;
210		case 'a':
211			aflag = 1;
212			break;
213		case 'd':
214			dflag = 1;
215			break;
216		case 'f':
217			if (strcmp(optarg, "ns") == 0)
218				af = AF_NS;
219			else if (strcmp(optarg, "inet") == 0)
220				af = AF_INET;
221			else if (strcmp(optarg, "unix") == 0)
222				af = AF_UNIX;
223			else if (strcmp(optarg, "iso") == 0)
224				af = AF_ISO;
225			else {
226				(void)fprintf(stderr,
227				    "%s: %s: unknown address family\n",
228				    prog, optarg);
229				exit(1);
230			}
231			break;
232		case 'g':
233			gflag = 1;
234			break;
235		case 'I': {
236			char *cp;
237
238			iflag = 1;
239			for (cp = interface = optarg; isalpha(*cp); cp++)
240				continue;
241			unit = atoi(cp);
242			*cp = '\0';
243			break;
244		}
245		case 'i':
246			iflag = 1;
247			break;
248		case 'M':
249			memf = optarg;
250			break;
251		case 'm':
252			mflag = 1;
253			break;
254		case 'N':
255			nlistf = optarg;
256			break;
257		case 'n':
258			nflag = 1;
259			break;
260		case 'p':
261			if ((tp = name2protox(optarg)) == NULL) {
262				(void)fprintf(stderr,
263				    "%s: %s: unknown or uninstrumented protocol\n",
264				    prog, optarg);
265				exit(1);
266			}
267			pflag = 1;
268			break;
269		case 'r':
270			rflag = 1;
271			break;
272		case 's':
273			++sflag;
274			break;
275		case 't':
276			tflag = 1;
277			break;
278		case 'u':
279			af = AF_UNIX;
280			break;
281		case 'w':
282			interval = atoi(optarg);
283			iflag = 1;
284			break;
285		case '?':
286		default:
287			usage();
288		}
289	argv += optind;
290	argc -= optind;
291
292#define	BACKWARD_COMPATIBILITY
293#ifdef	BACKWARD_COMPATIBILITY
294	if (*argv) {
295		if (isdigit(**argv)) {
296			interval = atoi(*argv);
297			if (interval <= 0)
298				usage();
299			++argv;
300			iflag = 1;
301		}
302		if (*argv) {
303			nlistf = *argv;
304			if (*++argv)
305				memf = *argv;
306		}
307	}
308#endif
309
310	/*
311	 * Discard setgid privileges if not the running kernel so that bad
312	 * guys can't print interesting stuff from kernel memory.
313	 */
314	if (nlistf != NULL || memf != NULL)
315		setgid(getgid());
316
317	if ((kvmd = kvm_open(nlistf, memf, NULL, O_RDONLY, prog)) == NULL) {
318		fprintf(stderr, "%s: kvm_open: %s\n", prog, buf);
319		exit(1);
320	}
321	if (kvm_nlist(kvmd, nl) < 0 || nl[0].n_type == 0) {
322		if (nlistf)
323			fprintf(stderr, "%s: %s: no namelist\n", prog, nlistf);
324		else
325			fprintf(stderr, "%s: no namelist\n", prog);
326		exit(1);
327	}
328	if (mflag) {
329		mbpr(nl[N_MBSTAT].n_value);
330		exit(0);
331	}
332	if (pflag) {
333		if (tp->pr_stats)
334			(*tp->pr_stats)(nl[tp->pr_sindex].n_value,
335				tp->pr_name);
336		else
337			printf("%s: no stats routine\n", tp->pr_name);
338		exit(0);
339	}
340	/*
341	 * Keep file descriptors open to avoid overhead
342	 * of open/close on each call to get* routines.
343	 */
344	sethostent(1);
345	setnetent(1);
346	if (iflag) {
347		intpr(interval, nl[N_IFNET].n_value);
348		exit(0);
349	}
350	if (rflag) {
351		if (sflag)
352			rt_stats(nl[N_RTSTAT].n_value);
353		else
354			routepr(nl[N_RTREE].n_value);
355		exit(0);
356	}
357	if (gflag) {
358		if (sflag)
359			mrt_stats(nl[N_MRTPROTO].n_value,
360			    nl[N_MRTSTAT].n_value);
361		else
362			mroutepr(nl[N_MRTPROTO].n_value,
363			    nl[N_MRTTABLE].n_value,
364			    nl[N_VIFTABLE].n_value);
365		exit(0);
366	}
367	if (af == AF_INET || af == AF_UNSPEC) {
368		setprotoent(1);
369		setservent(1);
370		/* ugh, this is O(MN) ... why do we do this? */
371		while (p = getprotoent()) {
372			for (tp = protox; tp->pr_name; tp++)
373				if (strcmp(tp->pr_name, p->p_name) == 0)
374					break;
375			if (tp->pr_name == 0 || tp->pr_wanted == 0)
376				continue;
377			printproto(tp, p->p_name);
378		}
379		endprotoent();
380	}
381	if (af == AF_NS || af == AF_UNSPEC)
382		for (tp = nsprotox; tp->pr_name; tp++)
383			printproto(tp, tp->pr_name);
384	if (af == AF_ISO || af == AF_UNSPEC)
385		for (tp = isoprotox; tp->pr_name; tp++)
386			printproto(tp, tp->pr_name);
387	if ((af == AF_UNIX || af == AF_UNSPEC) && !sflag)
388		unixpr(nl[N_UNIXSW].n_value);
389	exit(0);
390}
391
392/*
393 * Print out protocol statistics or control blocks (per sflag).
394 * If the interface was not specifically requested, and the symbol
395 * is not in the namelist, ignore this one.
396 */
397static void
398printproto(tp, name)
399	register struct protox *tp;
400	char *name;
401{
402	void (*pr)();
403	u_long off;
404
405	if (sflag) {
406		pr = tp->pr_stats;
407		off = nl[tp->pr_sindex].n_value;
408	} else {
409		pr = tp->pr_cblocks;
410		off = nl[tp->pr_index].n_value;
411	}
412	if (pr != NULL && (off || af != AF_UNSPEC))
413		(*pr)(off, name);
414}
415
416/*
417 * Read kernel memory, return 0 on success.
418 */
419int
420kread(addr, buf, size)
421	u_long addr;
422	char *buf;
423	int size;
424{
425
426	if (kvm_read(kvmd, addr, buf, size) != size) {
427		/* XXX this duplicates kvm_read's error printout */
428		(void)fprintf(stderr, "%s: kvm_read %s\n", prog,
429		    kvm_geterr(kvmd));
430		return (-1);
431	}
432	return (0);
433}
434
435char *
436plural(n)
437	int n;
438{
439	return (n != 1 ? "s" : "");
440}
441
442char *
443plurales(n)
444	int n;
445{
446	return (n != 1 ? "es" : "");
447}
448
449/*
450 * Find the protox for the given "well-known" name.
451 */
452static struct protox *
453knownname(name)
454	char *name;
455{
456	struct protox **tpp, *tp;
457
458	for (tpp = protoprotox; *tpp; tpp++)
459		for (tp = *tpp; tp->pr_name; tp++)
460			if (strcmp(tp->pr_name, name) == 0)
461				return (tp);
462	return (NULL);
463}
464
465/*
466 * Find the protox corresponding to name.
467 */
468static struct protox *
469name2protox(name)
470	char *name;
471{
472	struct protox *tp;
473	char **alias;			/* alias from p->aliases */
474	struct protoent *p;
475
476	/*
477	 * Try to find the name in the list of "well-known" names. If that
478	 * fails, check if name is an alias for an Internet protocol.
479	 */
480	if (tp = knownname(name))
481		return (tp);
482
483	setprotoent(1);			/* make protocol lookup cheaper */
484	while (p = getprotoent()) {
485		/* assert: name not same as p->name */
486		for (alias = p->p_aliases; *alias; alias++)
487			if (strcmp(name, *alias) == 0) {
488				endprotoent();
489				return (knownname(p->p_name));
490			}
491	}
492	endprotoent();
493	return (NULL);
494}
495
496static void
497usage()
498{
499	(void)fprintf(stderr,
500"usage: %s [-Aan] [-f address_family] [-M core] [-N system]\n", prog);
501	(void)fprintf(stderr,
502"       %s [-ghimnrs] [-f address_family] [-M core] [-N system]\n", prog);
503	(void)fprintf(stderr,
504"       %s [-n] [-I interface] [-M core] [-N system] [-w wait]\n", prog);
505	(void)fprintf(stderr,
506"       %s [-M core] [-N system] [-p protocol]\n", prog);
507	exit(1);
508}
509