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MP table related static function renaming
[dragonfly.git] / usr.bin / netstat / main.c
blob6f2f1642f6230cbc4d009f755ef635e13282c034
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 * @(#) 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 $
36 * $DragonFly: src/usr.bin/netstat/main.c,v 1.16 2008/07/11 23:09:18 thomas Exp $
37 */
38
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
46 #include <netgraph/socket/ng_socket.h>
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
62 static struct nlist nl[] = {
63 #define N_IFNET 0
64 { .n_name = "_ifnet" },
65 #define N_IMP 1
66 { .n_name = "_imp_softc" },
67 #define N_RTSTAT 2
68 { .n_name = "_rtstat" },
69 #define N_UNIXSW 3
70 { .n_name = "_localsw" },
71 #define N_IDP 4
72 { .n_name = "_nspcb"},
73 #define N_IDPSTAT 5
74 { .n_name = "_idpstat"},
75 #define N_SPPSTAT 6
76 { .n_name = "_spp_istat"},
77 #define N_NSERR 7
78 { .n_name = "_ns_errstat"},
79 #define N_CLNPSTAT 8
80 { .n_name = "_clnp_stat"},
81 #define IN_NOTUSED 9
82 { .n_name = "_tp_inpcb" },
83 #define ISO_TP 10
84 { .n_name = "_tp_refinfo" },
85 #define N_TPSTAT 11
86 { .n_name = "_tp_stat" },
87 #define N_ESISSTAT 12
88 { .n_name = "_esis_stat"},
89 #define N_NIMP 13
90 { .n_name = "_nimp"},
91 #define N_RTREE 14
92 { .n_name = "_rt_tables"},
93 #define N_CLTP 15
94 { .n_name = "_cltb"},
95 #define N_CLTPSTAT 16
96 { .n_name = "_cltpstat"},
97 #define N_NFILE 17
98 { .n_name = "_nfile" },
99 #define N_FILE 18
100 { .n_name = "_file" },
101 #define N_MRTSTAT 19
102 { .n_name = "_mrtstat" },
103 #define N_MFCTABLE 20
104 { .n_name = "_mfctable" },
105 #define N_VIFTABLE 21
106 { .n_name = "_viftable" },
107 #define N_IPX 22
108 { .n_name = "_ipxpcb"},
109 #define N_IPXSTAT 23
110 { .n_name = "_ipxstat"},
111 #define N_SPXSTAT 24
112 { .n_name = "_spx_istat"},
113 #define N_DDPSTAT 25
114 { .n_name = "_ddpstat"},
115 #define N_DDPCB 26
116 { .n_name = "_ddpcb"},
117 #define N_NGSOCKS 27
118 { .n_name = "_ngsocklist"},
119 #define N_IP6STAT 28
120 { .n_name = "_ip6stat" },
121 #define N_ICMP6STAT 29
122 { .n_name = "_icmp6stat" },
123 #define N_IPSECSTAT 30
124 { .n_name = "_ipsecstat" },
125 #define N_IPSEC6STAT 31
126 { .n_name = "_ipsec6stat" },
127 #define N_PIM6STAT 32
128 { .n_name = "_pim6stat" },
129 #define N_MRT6PROTO 33
130 { .n_name = "_ip6_mrtproto" },
131 #define N_MRT6STAT 34
132 { .n_name = "_mrt6stat" },
133 #define N_MF6CTABLE 35
134 { .n_name = "_mf6ctable" },
135 #define N_MIF6TABLE 36
136 { .n_name = "_mif6table" },
137 #define N_PFKEYSTAT 37
138 { .n_name = "_pfkeystat" },
139 #define N_MBSTAT 38
140 { .n_name = "_mbstat" },
141 #define N_MBTYPES 39
142 { .n_name = "_mbtypes" },
143 #define N_NMBCLUSTERS 40
144 { .n_name = "_nmbclusters" },
145 #define N_NMBUFS 41
146 { .n_name = "_nmbufs" },
147 #define N_RTTRASH 42
148 { .n_name = "_rttrash" },
149 #define N_NCPUS 43
150 { .n_name = "_ncpus" },
151 #define N_CARPSTAT 44
152 { .n_name = "_carpstats" },
153 { .n_name = NULL },
154 };
155
156 struct protox {
157 u_char pr_index; /* index into nlist of cb head */
158 u_char pr_sindex; /* index into nlist of stat block */
159 u_char pr_wanted; /* 1 if wanted, 0 otherwise */
160 void (*pr_cblocks)(u_long, const char *, int);
161 /* control blocks printing routine */
162 void (*pr_stats)(u_long, const char *, int);
163 /* statistics printing routine */
164 void (*pr_istats)(char *); /* per/if statistics printing routine */
165 const char *pr_name; /* well-known name */
166 u_int pr_usesysctl; /* true if we use sysctl, not kvm */
167 } protox[] = {
168 { -1, -1, 1, protopr,
169 tcp_stats, NULL, "tcp", IPPROTO_TCP },
170 { -1, -1, 1, protopr,
171 udp_stats, NULL, "udp", IPPROTO_UDP },
172 { -1, -1, 1, protopr,
173 NULL, NULL, "divert",IPPROTO_DIVERT },
174 { -1, -1, 1, protopr,
175 ip_stats, NULL, "ip", IPPROTO_RAW },
176 { -1, -1, 1, protopr,
177 icmp_stats, NULL, "icmp", IPPROTO_ICMP },
178 { -1, -1, 1, protopr,
179 igmp_stats, NULL, "igmp", IPPROTO_IGMP },
180 #ifdef IPSEC
181 { -1, N_IPSECSTAT, 1, 0,
182 ipsec_stats, NULL, "ipsec", 0},
183 #endif
184 { -1, N_CARPSTAT, 1, 0,
185 carp_stats, NULL, "carp", 0},
186 { -1, -1, 0, 0,
187 0, NULL, NULL, 0}
188 };
189
190 #ifdef INET6
191 struct protox ip6protox[] = {
192 { -1, -1, 1, protopr,
193 tcp_stats, NULL, "tcp", IPPROTO_TCP },
194 { -1, -1, 1, protopr,
195 udp_stats, NULL, "udp", IPPROTO_UDP },
196 { -1, N_IP6STAT, 1, protopr,
197 ip6_stats, ip6_ifstats, "ip6", IPPROTO_RAW },
198 { -1, N_ICMP6STAT, 1, protopr,
199 icmp6_stats, icmp6_ifstats, "icmp6",IPPROTO_ICMPV6 },
200 #ifdef IPSEC
201 { -1, N_IPSEC6STAT, 1, 0,
202 ipsec_stats, NULL, "ipsec6",0 },
203 #endif
204 #ifdef notyet
205 { -1, N_PIM6STAT, 1, 0,
206 pim6_stats, NULL, "pim6", 0 },
207 #endif
208 { -1, -1, 1, 0,
209 rip6_stats, NULL, "rip6", 0 },
210 { -1, -1, 1, protopr,
211 pim_stats, NULL, "pim", IPPROTO_PIM },
212 { -1, -1, 0, 0,
213 0, NULL, 0, 0 }
214 };
215 #endif /*INET6*/
216
217 #ifdef IPSEC
218 struct protox pfkeyprotox[] = {
219 { -1, N_PFKEYSTAT, 1, 0,
220 pfkey_stats, NULL, "pfkey", 0 },
221 { -1, -1, 0, 0,
222 0, NULL, 0, 0 }
223 };
224 #endif
225
226 struct protox atalkprotox[] = {
227 { N_DDPCB, N_DDPSTAT, 1, atalkprotopr,
228 ddp_stats, NULL, "ddp", 0 },
229 { -1, -1, 0, 0,
230 0, NULL, NULL, 0 }
231 };
232
233 struct protox netgraphprotox[] = {
234 { N_NGSOCKS, -1, 1, netgraphprotopr,
235 NULL, NULL, "ctrl", 0 },
236 { N_NGSOCKS, -1, 1, netgraphprotopr,
237 NULL, NULL, "data", 0 },
238 { -1, -1, 0, 0,
239 0, NULL, NULL, 0 }
240 };
241
242 struct protox ipxprotox[] = {
243 { N_IPX, N_IPXSTAT, 1, ipxprotopr,
244 ipx_stats, NULL, "ipx", 0 },
245 { N_IPX, N_SPXSTAT, 1, ipxprotopr,
246 spx_stats, NULL, "spx", 0 },
247 { -1, -1, 0, 0,
248 0, NULL, 0, 0 }
249 };
250
251 #ifdef NS
252 struct protox nsprotox[] = {
253 { N_IDP, N_IDPSTAT, 1, nsprotopr,
254 idp_stats, NULL, "idp" },
255 { N_IDP, N_SPPSTAT, 1, nsprotopr,
256 spp_stats, NULL, "spp" },
257 { -1, N_NSERR, 1, 0,
258 nserr_stats, NULL, "ns_err" },
259 { -1, -1, 0, 0,
260 0, NULL, 0 }
261 };
262 #endif
263
264 #ifdef ISO
265 struct protox isoprotox[] = {
266 { ISO_TP, N_TPSTAT, 1, iso_protopr,
267 tp_stats, NULL, "tp" },
268 { N_CLTP, N_CLTPSTAT, 1, iso_protopr,
269 cltp_stats, NULL, "cltp" },
270 { -1, N_CLNPSTAT, 1, 0,
271 clnp_stats, NULL, "clnp"},
272 { -1, N_ESISSTAT, 1, 0,
273 esis_stats, NULL, "esis"},
274 { -1, -1, 0, 0,
275 0, NULL, 0 }
276 };
277 #endif
278
279 struct protox *protoprotox[] = {
280 protox,
281 #ifdef INET6
282 ip6protox,
283 #endif
284 #ifdef IPSEC
285 pfkeyprotox,
286 #endif
287 ipxprotox, atalkprotox,
288 #ifdef NS
289 nsprotox,
290 #endif
291 #ifdef ISO
292 isoprotox,
293 #endif
294 NULL };
295
296 static void printproto (struct protox *, const char *);
297 static void usage (void);
298 static struct protox *name2protox (char *);
299 static struct protox *knownname (char *);
300
301 static kvm_t *kvmd;
302 static char *nlistf = NULL, *memf = NULL;
303
304 int Aflag; /* show addresses of protocol control block */
305 int aflag; /* show all sockets (including servers) */
306 int bflag; /* show i/f total bytes in/out */
307 int cpuflag = -1; /* dump route table from specific cpu */
308 int dflag; /* show i/f dropped packets */
309 int gflag; /* show group (multicast) routing or stats */
310 int iflag; /* show interfaces */
311 int Lflag; /* show size of listen queues */
312 int mflag; /* show memory stats */
313 int Pflag; /* show more protocol info (go past 80 columns) */
314 int numeric_addr; /* show addresses numerically */
315 int numeric_port; /* show ports numerically */
316 static int pflag; /* show given protocol */
317 int rflag; /* show routing tables (or routing stats) */
318 int sflag; /* show protocol statistics */
319 int tflag; /* show i/f watchdog timers */
320 int Bflag; /* show buffer limit instead of buffer use */
321 int Wflag; /* wide display */
322 int zflag; /* zero stats */
323
324 int interval; /* repeat interval for i/f stats */
325
326 char *interface; /* desired i/f for stats, or NULL for all i/fs */
327 int unit; /* unit number for above */
328
329 int af; /* address family */
330
331 int
332 main(int argc, char **argv)
333 {
334 struct protox *tp = NULL; /* for printing cblocks & stats */
335 int ch;
336 int n;
337
338 af = AF_UNSPEC;
339
340 while ((ch = getopt(argc, argv, "Aabc:df:gI:iLlM:mN:nPp:rSsBtuWw:z")) != -1)
341 switch(ch) {
342 case 'A':
343 Aflag = 1;
344 break;
345 case 'a':
346 aflag = 1;
347 break;
348 case 'b':
349 bflag = 1;
350 break;
351 case 'c':
352 kread(0, 0, 0);
353 kread(nl[N_NCPUS].n_value, (char *)&n, sizeof(n));
354 cpuflag = strtol(optarg, NULL, 0);
355 if (cpuflag < 0 || cpuflag >= n)
356 errx(1, "cpu %d does not exist", cpuflag);
357 break;
358 case 'd':
359 dflag = 1;
360 break;
361 case 'f':
362 #ifdef NS
363 if (strcmp(optarg, "ns") == 0)
364 af = AF_NS;
365 else
366 #endif
367 if (strcmp(optarg, "ipx") == 0)
368 af = AF_IPX;
369 else if (strcmp(optarg, "inet") == 0)
370 af = AF_INET;
371 #ifdef INET6
372 else if (strcmp(optarg, "inet6") == 0)
373 af = AF_INET6;
374 #endif /*INET6*/
375 #ifdef INET6
376 else if (strcmp(optarg, "pfkey") == 0)
377 af = PF_KEY;
378 #endif /*INET6*/
379 else if (strcmp(optarg, "unix") == 0)
380 af = AF_UNIX;
381 else if (strcmp(optarg, "atalk") == 0)
382 af = AF_APPLETALK;
383 else if (strcmp(optarg, "ng") == 0
384 || strcmp(optarg, "netgraph") == 0)
385 af = AF_NETGRAPH;
386 #ifdef ISO
387 else if (strcmp(optarg, "iso") == 0)
388 af = AF_ISO;
389 #endif
390 else if (strcmp(optarg, "link") == 0)
391 af = AF_LINK;
392 else if (strcmp(optarg, "mpls") == 0)
393 af = AF_MPLS;
394 else {
395 errx(1, "%s: unknown address family", optarg);
396 }
397 break;
398 case 'g':
399 gflag = 1;
400 break;
401 case 'I': {
402 char *cp;
403
404 iflag = 1;
405 for (cp = interface = optarg; isalpha(*cp); cp++)
406 continue;
407 unit = atoi(cp);
408 break;
409 }
410 case 'i':
411 iflag = 1;
412 break;
413 case 'L':
414 Lflag = 1;
415 break;
416 case 'M':
417 memf = optarg;
418 break;
419 case 'm':
420 mflag = 1;
421 break;
422 case 'N':
423 nlistf = optarg;
424 break;
425 case 'n':
426 numeric_addr = numeric_port = 1;
427 break;
428 case 'P':
429 Pflag = 1;
430 break;
431 case 'p':
432 if ((tp = name2protox(optarg)) == NULL) {
433 errx(1,
434 "%s: unknown or uninstrumented protocol",
435 optarg);
436 }
437 pflag = 1;
438 break;
439 case 'r':
440 rflag = 1;
441 break;
442 case 's':
443 ++sflag;
444 break;
445 case 'S':
446 numeric_addr = 1;
447 break;
448 case 'B':
449 Bflag = 1;
450 break;
451 case 't':
452 tflag = 1;
453 break;
454 case 'u':
455 af = AF_UNIX;
456 break;
457 case 'W':
458 case 'l':
459 Wflag = 1;
460 break;
461 case 'w':
462 interval = atoi(optarg);
463 iflag = 1;
464 break;
465 case 'z':
466 zflag = 1;
467 break;
468 case '?':
469 default:
470 usage();
471 }
472 argv += optind;
473 argc -= optind;
474
475 #define BACKWARD_COMPATIBILITY
476 #ifdef BACKWARD_COMPATIBILITY
477 if (*argv) {
478 if (isdigit(**argv)) {
479 interval = atoi(*argv);
480 if (interval <= 0)
481 usage();
482 ++argv;
483 iflag = 1;
484 }
485 if (*argv) {
486 nlistf = *argv;
487 if (*++argv)
488 memf = *argv;
489 }
490 }
491 #endif
492
493 /*
494 * Discard setgid privileges if not the running kernel so that bad
495 * guys can't print interesting stuff from kernel memory.
496 */
497 if (nlistf != NULL || memf != NULL)
498 setgid(getgid());
499
500 if (mflag) {
501 if (memf != NULL) {
502 if (kread(0, 0, 0) == 0)
503 mbpr(nl[N_MBSTAT].n_value,
504 nl[N_MBTYPES].n_value,
505 nl[N_NMBCLUSTERS].n_value,
506 nl[N_NMBUFS].n_value);
507 } else
508 mbpr(0, 0, 0, 0);
509 exit(0);
510 }
511 #if 0
512 /*
513 * Keep file descriptors open to avoid overhead
514 * of open/close on each call to get* routines.
515 */
516 sethostent(1);
517 setnetent(1);
518 #else
519 /*
520 * This does not make sense any more with DNS being default over
521 * the files. Doing a setXXXXent(1) causes a tcp connection to be
522 * used for the queries, which is slower.
523 */
524 #endif
525 if (iflag && !sflag) {
526 kread(0, 0, 0);
527 intpr(interval, nl[N_IFNET].n_value, NULL);
528 exit(0);
529 }
530 if (rflag) {
531 kread(0, 0, 0);
532 if (sflag)
533 rt_stats();
534 else
535 routepr(nl[N_RTREE].n_value);
536 exit(0);
537 }
538 if (gflag) {
539 kread(0, 0, 0);
540 if (sflag) {
541 if (af == AF_INET || af == AF_UNSPEC)
542 mrt_stats(nl[N_MRTSTAT].n_value);
543 #ifdef INET6
544 if (af == AF_INET6 || af == AF_UNSPEC)
545 mrt6_stats(nl[N_MRT6STAT].n_value);
546 #endif
547 } else {
548 if (af == AF_INET || af == AF_UNSPEC)
549 mroutepr(nl[N_MFCTABLE].n_value,
550 nl[N_VIFTABLE].n_value);
551 #ifdef INET6
552 if (af == AF_INET6 || af == AF_UNSPEC)
553 mroute6pr(nl[N_MF6CTABLE].n_value,
554 nl[N_MIF6TABLE].n_value);
555 #endif
556 }
557 exit(0);
558 }
559
560 kread(0, 0, 0);
561 if (tp) {
562 printproto(tp, tp->pr_name);
563 exit(0);
564 }
565 if (af == AF_INET || af == AF_UNSPEC)
566 for (tp = protox; tp->pr_name; tp++)
567 printproto(tp, tp->pr_name);
568 #ifdef INET6
569 if (af == AF_INET6 || af == AF_UNSPEC)
570 for (tp = ip6protox; tp->pr_name; tp++)
571 printproto(tp, tp->pr_name);
572 #endif /*INET6*/
573 #ifdef IPSEC
574 if (af == PF_KEY || af == AF_UNSPEC)
575 for (tp = pfkeyprotox; tp->pr_name; tp++)
576 printproto(tp, tp->pr_name);
577 #endif /*IPSEC*/
578 if (af == AF_IPX || af == AF_UNSPEC) {
579 kread(0, 0, 0);
580 for (tp = ipxprotox; tp->pr_name; tp++)
581 printproto(tp, tp->pr_name);
582 }
583 if (af == AF_APPLETALK || af == AF_UNSPEC)
584 for (tp = atalkprotox; tp->pr_name; tp++)
585 printproto(tp, tp->pr_name);
586 if (af == AF_NETGRAPH || af == AF_UNSPEC)
587 for (tp = netgraphprotox; tp->pr_name; tp++)
588 printproto(tp, tp->pr_name);
589 #ifdef NS
590 if (af == AF_NS || af == AF_UNSPEC)
591 for (tp = nsprotox; tp->pr_name; tp++)
592 printproto(tp, tp->pr_name);
593 #endif
594 #ifdef ISO
595 if (af == AF_ISO || af == AF_UNSPEC)
596 for (tp = isoprotox; tp->pr_name; tp++)
597 printproto(tp, tp->pr_name);
598 #endif
599 if ((af == AF_UNIX || af == AF_UNSPEC) && !Lflag && !sflag)
600 unixpr();
601 exit(0);
602 }
603
604 /*
605 * Print out protocol statistics or control blocks (per sflag).
606 * If the interface was not specifically requested, and the symbol
607 * is not in the namelist, ignore this one.
608 */
609 static void
610 printproto(struct protox *tp, const char *name)
611 {
612 void (*pr)(u_long, const char *, int);
613 u_long off;
614
615 if (sflag) {
616 if (iflag) {
617 if (tp->pr_istats)
618 intpr(interval, nl[N_IFNET].n_value,
619 tp->pr_istats);
620 else if (pflag)
621 printf("%s: no per-interface stats routine\n",
622 tp->pr_name);
623 return;
624 }
625 else {
626 pr = tp->pr_stats;
627 if (!pr) {
628 if (pflag)
629 printf("%s: no stats routine\n",
630 tp->pr_name);
631 return;
632 }
633 off = tp->pr_usesysctl ? tp->pr_usesysctl
634 : nl[tp->pr_sindex].n_value;
635 }
636 } else {
637 pr = tp->pr_cblocks;
638 if (!pr) {
639 if (pflag)
640 printf("%s: no PCB routine\n", tp->pr_name);
641 return;
642 }
643 off = tp->pr_usesysctl ? tp->pr_usesysctl
644 : nl[tp->pr_index].n_value;
645 }
646 if (pr != NULL && (off || af != AF_UNSPEC))
647 (*pr)(off, name, af);
648 }
649
650 /*
651 * Read kernel memory, return 0 on success.
652 */
653 int
654 kread(u_long addr, char *buf, int size)
655 {
656 if (kvmd == 0) {
657 /*
658 * XXX.
659 */
660 kvmd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, buf);
661 if (kvmd != NULL) {
662 if (kvm_nlist(kvmd, nl) < 0) {
663 if(nlistf)
664 errx(1, "%s: kvm_nlist: %s", nlistf,
665 kvm_geterr(kvmd));
666 else
667 errx(1, "kvm_nlist: %s", kvm_geterr(kvmd));
668 }
669
670 if (nl[0].n_type == 0) {
671 if(nlistf)
672 errx(1, "%s: no namelist", nlistf);
673 else
674 errx(1, "no namelist");
675 }
676 } else {
677 warnx("kvm not available");
678 return(-1);
679 }
680 }
681 if (!buf)
682 return (0);
683 if (kvm_read(kvmd, addr, buf, size) != size) {
684 warnx("%s", kvm_geterr(kvmd));
685 return (-1);
686 }
687 return (0);
688 }
689
690 const char *
691 plural(int n)
692 {
693 return (n != 1 ? "s" : "");
694 }
695
696 const char *
697 plurales(int n)
698 {
699 return (n != 1 ? "es" : "");
700 }
701
702 /*
703 * Find the protox for the given "well-known" name.
704 */
705 static struct protox *
706 knownname(char *name)
707 {
708 struct protox **tpp, *tp;
709
710 for (tpp = protoprotox; *tpp; tpp++)
711 for (tp = *tpp; tp->pr_name; tp++)
712 if (strcmp(tp->pr_name, name) == 0)
713 return (tp);
714 return (NULL);
715 }
716
717 /*
718 * Find the protox corresponding to name.
719 */
720 static struct protox *
721 name2protox(char *name)
722 {
723 struct protox *tp;
724 char **alias; /* alias from p->aliases */
725 struct protoent *p;
726
727 /*
728 * Try to find the name in the list of "well-known" names. If that
729 * fails, check if name is an alias for an Internet protocol.
730 */
731 if ((tp = knownname(name)) != NULL)
732 return (tp);
733
734 setprotoent(1); /* make protocol lookup cheaper */
735 while ((p = getprotoent()) != NULL) {
736 /* assert: name not same as p->name */
737 for (alias = p->p_aliases; *alias; alias++)
738 if (strcmp(name, *alias) == 0) {
739 endprotoent();
740 return (knownname(p->p_name));
741 }
742 }
743 endprotoent();
744 return (NULL);
745 }
746
747 static void
748 usage(void)
749 {
750 (void)fprintf(stderr, "%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n",
751 "usage: netstat [-AaLnPSW] [-c cpu] [-f protocol_family | -p protocol]\n"
752 " [-M core] [-N system]",
753 " netstat -i | -I interface [-aBbdnt] [-f address_family]\n"
754 " [-M core] [-N system]",
755 " netstat -w wait [-I interface] [-d] [-M core] [-N system]",
756 " netstat -s [-s] [-z] [-f protocol_family | -p protocol] [-M core]",
757 " netstat -i | -I interface -s [-f protocol_family | -p protocol]\n"
758 " [-M core] [-N system]",
759 " netstat -m [-M core] [-N system]",
760 " netstat -r [-AanW] [-f address_family] [-M core] [-N system]",
761 " netstat -rs [-s] [-M core] [-N system]",
762 " netstat -g [-W] [-f address_family] [-M core] [-N system]",
763 " netstat -gs [-s] [-f address_family] [-M core] [-N system]");
764 exit(1);
765 }
DragonFly BSD