Add a missing initialization for the error variable which resulted in netstat
[dragonfly.git] / usr.bin / netstat / main.c
CommitLineData
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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.
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32 *
33 * @(#) Copyright (c) 1983, 1988, 1993 Regents of the University of California. All rights reserved.
34 * @(#)main.c 8.4 (Berkeley) 3/1/94
35 * $FreeBSD: src/usr.bin/netstat/main.c,v 1.34.2.12 2001/09/17 15:17:46 ru Exp $
caed4051 36 * $DragonFly: src/usr.bin/netstat/main.c,v 1.6 2004/03/08 22:41:05 dillon Exp $
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37 */
38
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39#include <sys/param.h>
40#include <sys/file.h>
41#include <sys/protosw.h>
42#include <sys/socket.h>
43
44#include <netinet/in.h>
45
38a690d7 46#include <netgraph/socket/ng_socket.h>
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47
48#include <ctype.h>
49#include <err.h>
50#include <errno.h>
51#include <kvm.h>
52#include <limits.h>
53#include <netdb.h>
54#include <nlist.h>
55#include <paths.h>
56#include <stdio.h>
57#include <stdlib.h>
58#include <string.h>
59#include <unistd.h>
60#include "netstat.h"
61
62static struct nlist nl[] = {
63#define N_IFNET 0
64 { "_ifnet" },
65#define N_IMP 1
66 { "_imp_softc" },
67#define N_RTSTAT 2
68 { "_rtstat" },
69#define N_UNIXSW 3
70 { "_localsw" },
71#define N_IDP 4
72 { "_nspcb"},
73#define N_IDPSTAT 5
74 { "_idpstat"},
75#define N_SPPSTAT 6
76 { "_spp_istat"},
77#define N_NSERR 7
78 { "_ns_errstat"},
79#define N_CLNPSTAT 8
80 { "_clnp_stat"},
81#define IN_NOTUSED 9
82 { "_tp_inpcb" },
83#define ISO_TP 10
84 { "_tp_refinfo" },
85#define N_TPSTAT 11
86 { "_tp_stat" },
87#define N_ESISSTAT 12
88 { "_esis_stat"},
89#define N_NIMP 13
90 { "_nimp"},
91#define N_RTREE 14
92 { "_rt_tables"},
93#define N_CLTP 15
94 { "_cltb"},
95#define N_CLTPSTAT 16
96 { "_cltpstat"},
97#define N_NFILE 17
98 { "_nfile" },
99#define N_FILE 18
100 { "_file" },
101#define N_MRTSTAT 19
102 { "_mrtstat" },
103#define N_MFCTABLE 20
104 { "_mfctable" },
105#define N_VIFTABLE 21
106 { "_viftable" },
107#define N_IPX 22
108 { "_ipxpcb"},
109#define N_IPXSTAT 23
110 { "_ipxstat"},
111#define N_SPXSTAT 24
112 { "_spx_istat"},
113#define N_DDPSTAT 25
114 { "_ddpstat"},
115#define N_DDPCB 26
116 { "_ddpcb"},
117#define N_NGSOCKS 27
118 { "_ngsocklist"},
119#define N_IP6STAT 28
120 { "_ip6stat" },
121#define N_ICMP6STAT 29
122 { "_icmp6stat" },
123#define N_IPSECSTAT 30
124 { "_ipsecstat" },
125#define N_IPSEC6STAT 31
126 { "_ipsec6stat" },
127#define N_PIM6STAT 32
128 { "_pim6stat" },
129#define N_MRT6PROTO 33
130 { "_ip6_mrtproto" },
131#define N_MRT6STAT 34
132 { "_mrt6stat" },
133#define N_MF6CTABLE 35
134 { "_mf6ctable" },
135#define N_MIF6TABLE 36
136 { "_mif6table" },
137#define N_PFKEYSTAT 37
138 { "_pfkeystat" },
139#define N_MBSTAT 38
140 { "_mbstat" },
141#define N_MBTYPES 39
142 { "_mbtypes" },
143#define N_NMBCLUSTERS 40
144 { "_nmbclusters" },
145#define N_NMBUFS 41
146 { "_nmbufs" },
147#define N_RTTRASH 42
148 { "_rttrash" },
149 { "" },
150};
151
152struct protox {
153 u_char pr_index; /* index into nlist of cb head */
154 u_char pr_sindex; /* index into nlist of stat block */
155 u_char pr_wanted; /* 1 if wanted, 0 otherwise */
156 void (*pr_cblocks)(u_long, char *, int);
157 /* control blocks printing routine */
158 void (*pr_stats)(u_long, char *, int);
159 /* statistics printing routine */
160 void (*pr_istats)(char *); /* per/if statistics printing routine */
161 char *pr_name; /* well-known name */
162 int pr_usesysctl; /* true if we use sysctl, not kvm */
163} protox[] = {
164 { -1, -1, 1, protopr,
165 tcp_stats, NULL, "tcp", IPPROTO_TCP },
166 { -1, -1, 1, protopr,
167 udp_stats, NULL, "udp", IPPROTO_UDP },
168 { -1, -1, 1, protopr,
169 NULL, NULL, "divert",IPPROTO_DIVERT },
170 { -1, -1, 1, protopr,
171 ip_stats, NULL, "ip", IPPROTO_RAW },
172 { -1, -1, 1, protopr,
173 icmp_stats, NULL, "icmp", IPPROTO_ICMP },
174 { -1, -1, 1, protopr,
175 igmp_stats, NULL, "igmp", IPPROTO_IGMP },
176#ifdef IPSEC
177 { -1, N_IPSECSTAT, 1, 0,
178 ipsec_stats, NULL, "ipsec", 0},
179#endif
180 { -1, -1, 1, 0,
181 bdg_stats, NULL, "bdg", 1 /* bridging... */ },
182 { -1, -1, 0, 0,
183 0, NULL, 0 }
184};
185
186#ifdef INET6
187struct protox ip6protox[] = {
188 { -1, -1, 1, protopr,
189 tcp_stats, NULL, "tcp", IPPROTO_TCP },
190 { -1, -1, 1, protopr,
191 udp_stats, NULL, "udp", IPPROTO_UDP },
192 { -1, N_IP6STAT, 1, protopr,
193 ip6_stats, ip6_ifstats, "ip6", IPPROTO_RAW },
194 { -1, N_ICMP6STAT, 1, protopr,
195 icmp6_stats, icmp6_ifstats, "icmp6",IPPROTO_ICMPV6 },
196#ifdef IPSEC
197 { -1, N_IPSEC6STAT, 1, 0,
198 ipsec_stats, NULL, "ipsec6",0 },
199#endif
200#ifdef notyet
201 { -1, N_PIM6STAT, 1, 0,
202 pim6_stats, NULL, "pim6", 0 },
203#endif
204 { -1, -1, 1, 0,
205 rip6_stats, NULL, "rip6", 0 },
206 { -1, -1, 1, 0,
207 bdg_stats, NULL, "bdg", 1 /* bridging... */ },
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208 { -1, -1, 1, protopr,
209 pim_stats, NULL, "pim", IPPROTO_PIM },
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210 { -1, -1, 0, 0,
211 0, NULL, 0, 0 }
212};
213#endif /*INET6*/
214
215#ifdef IPSEC
216struct protox pfkeyprotox[] = {
217 { -1, N_PFKEYSTAT, 1, 0,
218 pfkey_stats, NULL, "pfkey", 0 },
219 { -1, -1, 0, 0,
220 0, NULL, 0, 0 }
221};
222#endif
223
224struct protox atalkprotox[] = {
225 { N_DDPCB, N_DDPSTAT, 1, atalkprotopr,
226 ddp_stats, NULL, "ddp" },
227 { -1, -1, 0, 0,
228 0, NULL, 0 }
229};
230
231struct protox netgraphprotox[] = {
232 { N_NGSOCKS, -1, 1, netgraphprotopr,
233 NULL, NULL, "ctrl" },
234 { N_NGSOCKS, -1, 1, netgraphprotopr,
235 NULL, NULL, "data" },
236 { -1, NULL, 0, 0,
237 0, NULL, 0 }
238};
239
240struct protox ipxprotox[] = {
241 { N_IPX, N_IPXSTAT, 1, ipxprotopr,
242 ipx_stats, NULL, "ipx", 0 },
243 { N_IPX, N_SPXSTAT, 1, ipxprotopr,
244 spx_stats, NULL, "spx", 0 },
245 { -1, -1, 0, 0,
246 0, NULL, 0, 0 }
247};
248
249#ifdef NS
250struct protox nsprotox[] = {
251 { N_IDP, N_IDPSTAT, 1, nsprotopr,
252 idp_stats, NULL, "idp" },
253 { N_IDP, N_SPPSTAT, 1, nsprotopr,
254 spp_stats, NULL, "spp" },
255 { -1, N_NSERR, 1, 0,
256 nserr_stats, NULL, "ns_err" },
257 { -1, -1, 0, 0,
258 0, NULL, 0 }
259};
260#endif
261
262#ifdef ISO
263struct protox isoprotox[] = {
264 { ISO_TP, N_TPSTAT, 1, iso_protopr,
265 tp_stats, NULL, "tp" },
266 { N_CLTP, N_CLTPSTAT, 1, iso_protopr,
267 cltp_stats, NULL, "cltp" },
268 { -1, N_CLNPSTAT, 1, 0,
269 clnp_stats, NULL, "clnp"},
270 { -1, N_ESISSTAT, 1, 0,
271 esis_stats, NULL, "esis"},
272 { -1, -1, 0, 0,
273 0, NULL, 0 }
274};
275#endif
276
277struct protox *protoprotox[] = {
278 protox,
279#ifdef INET6
280 ip6protox,
281#endif
282#ifdef IPSEC
283 pfkeyprotox,
284#endif
285 ipxprotox, atalkprotox,
286#ifdef NS
287 nsprotox,
288#endif
289#ifdef ISO
290 isoprotox,
291#endif
292 NULL };
293
294static void printproto (struct protox *, char *);
295static void usage (void);
296static struct protox *name2protox (char *);
297static struct protox *knownname (char *);
298
299static kvm_t *kvmd;
300static char *nlistf = NULL, *memf = NULL;
301
302int Aflag; /* show addresses of protocol control block */
303int aflag; /* show all sockets (including servers) */
304int bflag; /* show i/f total bytes in/out */
305int dflag; /* show i/f dropped packets */
306int gflag; /* show group (multicast) routing or stats */
307int iflag; /* show interfaces */
308int Lflag; /* show size of listen queues */
309int mflag; /* show memory stats */
310int numeric_addr; /* show addresses numerically */
311int numeric_port; /* show ports numerically */
312static int pflag; /* show given protocol */
313int rflag; /* show routing tables (or routing stats) */
314int sflag; /* show protocol statistics */
315int tflag; /* show i/f watchdog timers */
caed4051 316int Bflag; /* show buffer limit instead of buffer use */
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317int Wflag; /* wide display */
318int zflag; /* zero stats */
319
320int interval; /* repeat interval for i/f stats */
321
322char *interface; /* desired i/f for stats, or NULL for all i/fs */
323int unit; /* unit number for above */
324
325int af; /* address family */
326
327int
1d1731fa 328main(int argc, char **argv)
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329{
330 register struct protox *tp = NULL; /* for printing cblocks & stats */
331 int ch;
332
333 af = AF_UNSPEC;
334
caed4051 335 while ((ch = getopt(argc, argv, "Aabdf:gI:iLlM:mN:np:rSsBtuWw:z")) != -1)
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336 switch(ch) {
337 case 'A':
338 Aflag = 1;
339 break;
340 case 'a':
341 aflag = 1;
342 break;
343 case 'b':
344 bflag = 1;
345 break;
346 case 'd':
347 dflag = 1;
348 break;
349 case 'f':
350#ifdef NS
351 if (strcmp(optarg, "ns") == 0)
352 af = AF_NS;
353 else
354#endif
355 if (strcmp(optarg, "ipx") == 0)
356 af = AF_IPX;
357 else if (strcmp(optarg, "inet") == 0)
358 af = AF_INET;
359#ifdef INET6
360 else if (strcmp(optarg, "inet6") == 0)
361 af = AF_INET6;
362#endif /*INET6*/
363#ifdef INET6
364 else if (strcmp(optarg, "pfkey") == 0)
365 af = PF_KEY;
366#endif /*INET6*/
367 else if (strcmp(optarg, "unix") == 0)
368 af = AF_UNIX;
369 else if (strcmp(optarg, "atalk") == 0)
370 af = AF_APPLETALK;
371 else if (strcmp(optarg, "ng") == 0
372 || strcmp(optarg, "netgraph") == 0)
373 af = AF_NETGRAPH;
374#ifdef ISO
375 else if (strcmp(optarg, "iso") == 0)
376 af = AF_ISO;
377#endif
378 else if (strcmp(optarg, "link") == 0)
379 af = AF_LINK;
380 else {
381 errx(1, "%s: unknown address family", optarg);
382 }
383 break;
384 case 'g':
385 gflag = 1;
386 break;
387 case 'I': {
388 char *cp;
389
390 iflag = 1;
391 for (cp = interface = optarg; isalpha(*cp); cp++)
392 continue;
393 unit = atoi(cp);
394 break;
395 }
396 case 'i':
397 iflag = 1;
398 break;
399 case 'L':
400 Lflag = 1;
401 break;
402 case 'M':
403 memf = optarg;
404 break;
405 case 'm':
406 mflag = 1;
407 break;
408 case 'N':
409 nlistf = optarg;
410 break;
411 case 'n':
412 numeric_addr = numeric_port = 1;
413 break;
414 case 'p':
415 if ((tp = name2protox(optarg)) == NULL) {
416 errx(1,
417 "%s: unknown or uninstrumented protocol",
418 optarg);
419 }
420 pflag = 1;
421 break;
422 case 'r':
423 rflag = 1;
424 break;
425 case 's':
426 ++sflag;
427 break;
428 case 'S':
429 numeric_addr = 1;
430 break;
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431 case 'B':
432 Bflag = 1;
433 break;
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434 case 't':
435 tflag = 1;
436 break;
437 case 'u':
438 af = AF_UNIX;
439 break;
440 case 'W':
441 case 'l':
442 Wflag = 1;
443 break;
444 case 'w':
445 interval = atoi(optarg);
446 iflag = 1;
447 break;
448 case 'z':
449 zflag = 1;
450 break;
451 case '?':
452 default:
453 usage();
454 }
455 argv += optind;
456 argc -= optind;
457
458#define BACKWARD_COMPATIBILITY
459#ifdef BACKWARD_COMPATIBILITY
460 if (*argv) {
461 if (isdigit(**argv)) {
462 interval = atoi(*argv);
463 if (interval <= 0)
464 usage();
465 ++argv;
466 iflag = 1;
467 }
468 if (*argv) {
469 nlistf = *argv;
470 if (*++argv)
471 memf = *argv;
472 }
473 }
474#endif
475
476 /*
477 * Discard setgid privileges if not the running kernel so that bad
478 * guys can't print interesting stuff from kernel memory.
479 */
480 if (nlistf != NULL || memf != NULL)
481 setgid(getgid());
482
483 if (mflag) {
484 if (memf != NULL) {
485 if (kread(0, 0, 0) == 0)
486 mbpr(nl[N_MBSTAT].n_value,
487 nl[N_MBTYPES].n_value,
488 nl[N_NMBCLUSTERS].n_value,
489 nl[N_NMBUFS].n_value);
490 } else
491 mbpr(0, 0, 0, 0);
492 exit(0);
493 }
494#if 0
495 /*
496 * Keep file descriptors open to avoid overhead
497 * of open/close on each call to get* routines.
498 */
499 sethostent(1);
500 setnetent(1);
501#else
502 /*
503 * This does not make sense any more with DNS being default over
504 * the files. Doing a setXXXXent(1) causes a tcp connection to be
505 * used for the queries, which is slower.
506 */
507#endif
508 if (iflag && !sflag) {
509 kread(0, 0, 0);
510 intpr(interval, nl[N_IFNET].n_value, NULL);
511 exit(0);
512 }
513 if (rflag) {
514 kread(0, 0, 0);
515 if (sflag)
516 rt_stats(nl[N_RTSTAT].n_value, nl[N_RTTRASH].n_value);
517 else
518 routepr(nl[N_RTREE].n_value);
519 exit(0);
520 }
521 if (gflag) {
522 kread(0, 0, 0);
523 if (sflag) {
524 if (af == AF_INET || af == AF_UNSPEC)
525 mrt_stats(nl[N_MRTSTAT].n_value);
526#ifdef INET6
527 if (af == AF_INET6 || af == AF_UNSPEC)
528 mrt6_stats(nl[N_MRT6STAT].n_value);
529#endif
530 } else {
531 if (af == AF_INET || af == AF_UNSPEC)
532 mroutepr(nl[N_MFCTABLE].n_value,
533 nl[N_VIFTABLE].n_value);
534#ifdef INET6
535 if (af == AF_INET6 || af == AF_UNSPEC)
536 mroute6pr(nl[N_MF6CTABLE].n_value,
537 nl[N_MIF6TABLE].n_value);
538#endif
539 }
540 exit(0);
541 }
542
543 kread(0, 0, 0);
544 if (tp) {
545 printproto(tp, tp->pr_name);
546 exit(0);
547 }
548 if (af == AF_INET || af == AF_UNSPEC)
549 for (tp = protox; tp->pr_name; tp++)
550 printproto(tp, tp->pr_name);
551#ifdef INET6
552 if (af == AF_INET6 || af == AF_UNSPEC)
553 for (tp = ip6protox; tp->pr_name; tp++)
554 printproto(tp, tp->pr_name);
555#endif /*INET6*/
556#ifdef IPSEC
557 if (af == PF_KEY || af == AF_UNSPEC)
558 for (tp = pfkeyprotox; tp->pr_name; tp++)
559 printproto(tp, tp->pr_name);
560#endif /*IPSEC*/
561 if (af == AF_IPX || af == AF_UNSPEC) {
562 kread(0, 0, 0);
563 for (tp = ipxprotox; tp->pr_name; tp++)
564 printproto(tp, tp->pr_name);
565 }
566 if (af == AF_APPLETALK || af == AF_UNSPEC)
567 for (tp = atalkprotox; tp->pr_name; tp++)
568 printproto(tp, tp->pr_name);
569 if (af == AF_NETGRAPH || af == AF_UNSPEC)
570 for (tp = netgraphprotox; tp->pr_name; tp++)
571 printproto(tp, tp->pr_name);
572#ifdef NS
573 if (af == AF_NS || af == AF_UNSPEC)
574 for (tp = nsprotox; tp->pr_name; tp++)
575 printproto(tp, tp->pr_name);
576#endif
577#ifdef ISO
578 if (af == AF_ISO || af == AF_UNSPEC)
579 for (tp = isoprotox; tp->pr_name; tp++)
580 printproto(tp, tp->pr_name);
581#endif
582 if ((af == AF_UNIX || af == AF_UNSPEC) && !Lflag && !sflag)
583 unixpr();
584 exit(0);
585}
586
587/*
588 * Print out protocol statistics or control blocks (per sflag).
589 * If the interface was not specifically requested, and the symbol
590 * is not in the namelist, ignore this one.
591 */
592static void
1d1731fa 593printproto(register struct protox *tp, char *name)
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594{
595 void (*pr)(u_long, char *, int);
596 u_long off;
597
598 if (sflag) {
599 if (iflag) {
600 if (tp->pr_istats)
601 intpr(interval, nl[N_IFNET].n_value,
602 tp->pr_istats);
603 else if (pflag)
604 printf("%s: no per-interface stats routine\n",
605 tp->pr_name);
606 return;
607 }
608 else {
609 pr = tp->pr_stats;
610 if (!pr) {
611 if (pflag)
612 printf("%s: no stats routine\n",
613 tp->pr_name);
614 return;
615 }
616 off = tp->pr_usesysctl ? tp->pr_usesysctl
617 : nl[tp->pr_sindex].n_value;
618 }
619 } else {
620 pr = tp->pr_cblocks;
621 if (!pr) {
622 if (pflag)
623 printf("%s: no PCB routine\n", tp->pr_name);
624 return;
625 }
626 off = tp->pr_usesysctl ? tp->pr_usesysctl
627 : nl[tp->pr_index].n_value;
628 }
629 if (pr != NULL && (off || af != AF_UNSPEC))
630 (*pr)(off, name, af);
631}
632
633/*
634 * Read kernel memory, return 0 on success.
635 */
636int
637kread(u_long addr, char *buf, int size)
638{
639 if (kvmd == 0) {
640 /*
641 * XXX.
642 */
643 kvmd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, buf);
644 if (kvmd != NULL) {
645 if (kvm_nlist(kvmd, nl) < 0) {
646 if(nlistf)
647 errx(1, "%s: kvm_nlist: %s", nlistf,
648 kvm_geterr(kvmd));
649 else
650 errx(1, "kvm_nlist: %s", kvm_geterr(kvmd));
651 }
652
653 if (nl[0].n_type == 0) {
654 if(nlistf)
655 errx(1, "%s: no namelist", nlistf);
656 else
657 errx(1, "no namelist");
658 }
659 } else {
660 warnx("kvm not available");
661 return(-1);
662 }
663 }
664 if (!buf)
665 return (0);
666 if (kvm_read(kvmd, addr, buf, size) != size) {
667 warnx("%s", kvm_geterr(kvmd));
668 return (-1);
669 }
670 return (0);
671}
672
673char *
674plural(int n)
675{
676 return (n != 1 ? "s" : "");
677}
678
679char *
680plurales(int n)
681{
682 return (n != 1 ? "es" : "");
683}
684
685/*
686 * Find the protox for the given "well-known" name.
687 */
688static struct protox *
689knownname(char *name)
690{
691 struct protox **tpp, *tp;
692
693 for (tpp = protoprotox; *tpp; tpp++)
694 for (tp = *tpp; tp->pr_name; tp++)
695 if (strcmp(tp->pr_name, name) == 0)
696 return (tp);
697 return (NULL);
698}
699
700/*
701 * Find the protox corresponding to name.
702 */
703static struct protox *
704name2protox(char *name)
705{
706 struct protox *tp;
707 char **alias; /* alias from p->aliases */
708 struct protoent *p;
709
710 /*
711 * Try to find the name in the list of "well-known" names. If that
712 * fails, check if name is an alias for an Internet protocol.
713 */
714 if ((tp = knownname(name)) != NULL)
715 return (tp);
716
717 setprotoent(1); /* make protocol lookup cheaper */
718 while ((p = getprotoent()) != NULL) {
719 /* assert: name not same as p->name */
720 for (alias = p->p_aliases; *alias; alias++)
721 if (strcmp(name, *alias) == 0) {
722 endprotoent();
723 return (knownname(p->p_name));
724 }
725 }
726 endprotoent();
727 return (NULL);
728}
729
730static void
731usage(void)
732{
733 (void)fprintf(stderr, "%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n",
734"usage: netstat [-AaLnSW] [-f protocol_family | -p protocol]\n"
735" [-M core] [-N system]",
736" netstat -i | -I interface [-abdnt] [-f address_family]\n"
737" [-M core] [-N system]",
738" netstat -w wait [-I interface] [-d] [-M core] [-N system]",
739" netstat -s [-s] [-z] [-f protocol_family | -p protocol] [-M core]",
740" netstat -i | -I interface -s [-f protocol_family | -p protocol]\n"
741" [-M core] [-N system]",
742" netstat -m [-M core] [-N system]",
743" netstat -r [-AanW] [-f address_family] [-M core] [-N system]",
744" netstat -rs [-s] [-M core] [-N system]",
745" netstat -g [-W] [-f address_family] [-M core] [-N system]",
746" netstat -gs [-s] [-f address_family] [-M core] [-N system]");
747 exit(1);
748}