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From within a virtual kernel, make /sbin/shutdown and /sbin/halt actually
[dragonfly/vkernel-mp.git] / usr.bin / netstat / main.c
blobf835d26297def277da4676ebc30ea366757ceed0
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 1.12 2006/06/25 13:02:40 corecode 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 { "_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 #define N_NCPUS 43
150 { "_ncpus" },
151 { "" },
152 };
153
154 struct protox {
155 u_char pr_index; /* index into nlist of cb head */
156 u_char pr_sindex; /* index into nlist of stat block */
157 u_char pr_wanted; /* 1 if wanted, 0 otherwise */
158 void (*pr_cblocks)(u_long, char *, int);
159 /* control blocks printing routine */
160 void (*pr_stats)(u_long, char *, int);
161 /* statistics printing routine */
162 void (*pr_istats)(char *); /* per/if statistics printing routine */
163 char *pr_name; /* well-known name */
164 int pr_usesysctl; /* true if we use sysctl, not kvm */
165 } protox[] = {
166 { -1, -1, 1, protopr,
167 tcp_stats, NULL, "tcp", IPPROTO_TCP },
168 { -1, -1, 1, protopr,
169 udp_stats, NULL, "udp", IPPROTO_UDP },
170 { -1, -1, 1, protopr,
171 NULL, NULL, "divert",IPPROTO_DIVERT },
172 { -1, -1, 1, protopr,
173 ip_stats, NULL, "ip", IPPROTO_RAW },
174 { -1, -1, 1, protopr,
175 icmp_stats, NULL, "icmp", IPPROTO_ICMP },
176 { -1, -1, 1, protopr,
177 igmp_stats, NULL, "igmp", IPPROTO_IGMP },
178 #ifdef IPSEC
179 { -1, N_IPSECSTAT, 1, 0,
180 ipsec_stats, NULL, "ipsec", 0},
181 #endif
182 { -1, -1, 0, 0,
183 0, NULL, 0 }
184 };
185
186 #ifdef INET6
187 struct 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, protopr,
207 pim_stats, NULL, "pim", IPPROTO_PIM },
208 { -1, -1, 0, 0,
209 0, NULL, 0, 0 }
210 };
211 #endif /*INET6*/
212
213 #ifdef IPSEC
214 struct protox pfkeyprotox[] = {
215 { -1, N_PFKEYSTAT, 1, 0,
216 pfkey_stats, NULL, "pfkey", 0 },
217 { -1, -1, 0, 0,
218 0, NULL, 0, 0 }
219 };
220 #endif
221
222 struct protox atalkprotox[] = {
223 { N_DDPCB, N_DDPSTAT, 1, atalkprotopr,
224 ddp_stats, NULL, "ddp" },
225 { -1, -1, 0, 0,
226 0, NULL, 0 }
227 };
228
229 struct protox netgraphprotox[] = {
230 { N_NGSOCKS, -1, 1, netgraphprotopr,
231 NULL, NULL, "ctrl" },
232 { N_NGSOCKS, -1, 1, netgraphprotopr,
233 NULL, NULL, "data" },
234 { -1, NULL, 0, 0,
235 0, NULL, 0 }
236 };
237
238 struct protox ipxprotox[] = {
239 { N_IPX, N_IPXSTAT, 1, ipxprotopr,
240 ipx_stats, NULL, "ipx", 0 },
241 { N_IPX, N_SPXSTAT, 1, ipxprotopr,
242 spx_stats, NULL, "spx", 0 },
243 { -1, -1, 0, 0,
244 0, NULL, 0, 0 }
245 };
246
247 #ifdef NS
248 struct protox nsprotox[] = {
249 { N_IDP, N_IDPSTAT, 1, nsprotopr,
250 idp_stats, NULL, "idp" },
251 { N_IDP, N_SPPSTAT, 1, nsprotopr,
252 spp_stats, NULL, "spp" },
253 { -1, N_NSERR, 1, 0,
254 nserr_stats, NULL, "ns_err" },
255 { -1, -1, 0, 0,
256 0, NULL, 0 }
257 };
258 #endif
259
260 #ifdef ISO
261 struct protox isoprotox[] = {
262 { ISO_TP, N_TPSTAT, 1, iso_protopr,
263 tp_stats, NULL, "tp" },
264 { N_CLTP, N_CLTPSTAT, 1, iso_protopr,
265 cltp_stats, NULL, "cltp" },
266 { -1, N_CLNPSTAT, 1, 0,
267 clnp_stats, NULL, "clnp"},
268 { -1, N_ESISSTAT, 1, 0,
269 esis_stats, NULL, "esis"},
270 { -1, -1, 0, 0,
271 0, NULL, 0 }
272 };
273 #endif
274
275 struct protox *protoprotox[] = {
276 protox,
277 #ifdef INET6
278 ip6protox,
279 #endif
280 #ifdef IPSEC
281 pfkeyprotox,
282 #endif
283 ipxprotox, atalkprotox,
284 #ifdef NS
285 nsprotox,
286 #endif
287 #ifdef ISO
288 isoprotox,
289 #endif
290 NULL };
291
292 static void printproto (struct protox *, char *);
293 static void usage (void);
294 static struct protox *name2protox (char *);
295 static struct protox *knownname (char *);
296
297 static kvm_t *kvmd;
298 static char *nlistf = NULL, *memf = NULL;
299
300 int Aflag; /* show addresses of protocol control block */
301 int aflag; /* show all sockets (including servers) */
302 int bflag; /* show i/f total bytes in/out */
303 int cpuflag = -1; /* dump route table from specific cpu */
304 int dflag; /* show i/f dropped packets */
305 int gflag; /* show group (multicast) routing or stats */
306 int iflag; /* show interfaces */
307 int Lflag; /* show size of listen queues */
308 int mflag; /* show memory stats */
309 int Pflag; /* show more protocol info (go past 80 columns) */
310 int numeric_addr; /* show addresses numerically */
311 int numeric_port; /* show ports numerically */
312 static int pflag; /* show given protocol */
313 int rflag; /* show routing tables (or routing stats) */
314 int sflag; /* show protocol statistics */
315 int tflag; /* show i/f watchdog timers */
316 int Bflag; /* show buffer limit instead of buffer use */
317 int Wflag; /* wide display */
318 int zflag; /* zero stats */
319
320 int interval; /* repeat interval for i/f stats */
321
322 char *interface; /* desired i/f for stats, or NULL for all i/fs */
323 int unit; /* unit number for above */
324
325 int af; /* address family */
326
327 int
328 main(int argc, char **argv)
329 {
330 struct protox *tp = NULL; /* for printing cblocks & stats */
331 int ch;
332 int n;
333
334 af = AF_UNSPEC;
335
336 while ((ch = getopt(argc, argv, "Aabc:df:gI:iLlM:mN:nPp:rSsBtuWw:z")) != -1)
337 switch(ch) {
338 case 'A':
339 Aflag = 1;
340 break;
341 case 'a':
342 aflag = 1;
343 break;
344 case 'b':
345 bflag = 1;
346 break;
347 case 'c':
348 kread(0, 0, 0);
349 kread(nl[N_NCPUS].n_value, (char *)&n, sizeof(n));
350 cpuflag = strtol(optarg, NULL, 0);
351 if (cpuflag < 0 || cpuflag >= n)
352 errx(1, "cpu %d does not exist", cpuflag);
353 break;
354 case 'd':
355 dflag = 1;
356 break;
357 case 'f':
358 #ifdef NS
359 if (strcmp(optarg, "ns") == 0)
360 af = AF_NS;
361 else
362 #endif
363 if (strcmp(optarg, "ipx") == 0)
364 af = AF_IPX;
365 else if (strcmp(optarg, "inet") == 0)
366 af = AF_INET;
367 #ifdef INET6
368 else if (strcmp(optarg, "inet6") == 0)
369 af = AF_INET6;
370 #endif /*INET6*/
371 #ifdef INET6
372 else if (strcmp(optarg, "pfkey") == 0)
373 af = PF_KEY;
374 #endif /*INET6*/
375 else if (strcmp(optarg, "unix") == 0)
376 af = AF_UNIX;
377 else if (strcmp(optarg, "atalk") == 0)
378 af = AF_APPLETALK;
379 else if (strcmp(optarg, "ng") == 0
380 || strcmp(optarg, "netgraph") == 0)
381 af = AF_NETGRAPH;
382 #ifdef ISO
383 else if (strcmp(optarg, "iso") == 0)
384 af = AF_ISO;
385 #endif
386 else if (strcmp(optarg, "link") == 0)
387 af = AF_LINK;
388 else {
389 errx(1, "%s: unknown address family", optarg);
390 }
391 break;
392 case 'g':
393 gflag = 1;
394 break;
395 case 'I': {
396 char *cp;
397
398 iflag = 1;
399 for (cp = interface = optarg; isalpha(*cp); cp++)
400 continue;
401 unit = atoi(cp);
402 break;
403 }
404 case 'i':
405 iflag = 1;
406 break;
407 case 'L':
408 Lflag = 1;
409 break;
410 case 'M':
411 memf = optarg;
412 break;
413 case 'm':
414 mflag = 1;
415 break;
416 case 'N':
417 nlistf = optarg;
418 break;
419 case 'n':
420 numeric_addr = numeric_port = 1;
421 break;
422 case 'P':
423 Pflag = 1;
424 break;
425 case 'p':
426 if ((tp = name2protox(optarg)) == NULL) {
427 errx(1,
428 "%s: unknown or uninstrumented protocol",
429 optarg);
430 }
431 pflag = 1;
432 break;
433 case 'r':
434 rflag = 1;
435 break;
436 case 's':
437 ++sflag;
438 break;
439 case 'S':
440 numeric_addr = 1;
441 break;
442 case 'B':
443 Bflag = 1;
444 break;
445 case 't':
446 tflag = 1;
447 break;
448 case 'u':
449 af = AF_UNIX;
450 break;
451 case 'W':
452 case 'l':
453 Wflag = 1;
454 break;
455 case 'w':
456 interval = atoi(optarg);
457 iflag = 1;
458 break;
459 case 'z':
460 zflag = 1;
461 break;
462 case '?':
463 default:
464 usage();
465 }
466 argv += optind;
467 argc -= optind;
468
469 #define BACKWARD_COMPATIBILITY
470 #ifdef BACKWARD_COMPATIBILITY
471 if (*argv) {
472 if (isdigit(**argv)) {
473 interval = atoi(*argv);
474 if (interval <= 0)
475 usage();
476 ++argv;
477 iflag = 1;
478 }
479 if (*argv) {
480 nlistf = *argv;
481 if (*++argv)
482 memf = *argv;
483 }
484 }
485 #endif
486
487 /*
488 * Discard setgid privileges if not the running kernel so that bad
489 * guys can't print interesting stuff from kernel memory.
490 */
491 if (nlistf != NULL || memf != NULL)
492 setgid(getgid());
493
494 if (mflag) {
495 if (memf != NULL) {
496 if (kread(0, 0, 0) == 0)
497 mbpr(nl[N_MBSTAT].n_value,
498 nl[N_MBTYPES].n_value,
499 nl[N_NMBCLUSTERS].n_value,
500 nl[N_NMBUFS].n_value);
501 } else
502 mbpr(0, 0, 0, 0);
503 exit(0);
504 }
505 #if 0
506 /*
507 * Keep file descriptors open to avoid overhead
508 * of open/close on each call to get* routines.
509 */
510 sethostent(1);
511 setnetent(1);
512 #else
513 /*
514 * This does not make sense any more with DNS being default over
515 * the files. Doing a setXXXXent(1) causes a tcp connection to be
516 * used for the queries, which is slower.
517 */
518 #endif
519 if (iflag && !sflag) {
520 kread(0, 0, 0);
521 intpr(interval, nl[N_IFNET].n_value, NULL);
522 exit(0);
523 }
524 if (rflag) {
525 kread(0, 0, 0);
526 if (sflag)
527 rt_stats();
528 else
529 routepr(nl[N_RTREE].n_value);
530 exit(0);
531 }
532 if (gflag) {
533 kread(0, 0, 0);
534 if (sflag) {
535 if (af == AF_INET || af == AF_UNSPEC)
536 mrt_stats(nl[N_MRTSTAT].n_value);
537 #ifdef INET6
538 if (af == AF_INET6 || af == AF_UNSPEC)
539 mrt6_stats(nl[N_MRT6STAT].n_value);
540 #endif
541 } else {
542 if (af == AF_INET || af == AF_UNSPEC)
543 mroutepr(nl[N_MFCTABLE].n_value,
544 nl[N_VIFTABLE].n_value);
545 #ifdef INET6
546 if (af == AF_INET6 || af == AF_UNSPEC)
547 mroute6pr(nl[N_MF6CTABLE].n_value,
548 nl[N_MIF6TABLE].n_value);
549 #endif
550 }
551 exit(0);
552 }
553
554 kread(0, 0, 0);
555 if (tp) {
556 printproto(tp, tp->pr_name);
557 exit(0);
558 }
559 if (af == AF_INET || af == AF_UNSPEC)
560 for (tp = protox; tp->pr_name; tp++)
561 printproto(tp, tp->pr_name);
562 #ifdef INET6
563 if (af == AF_INET6 || af == AF_UNSPEC)
564 for (tp = ip6protox; tp->pr_name; tp++)
565 printproto(tp, tp->pr_name);
566 #endif /*INET6*/
567 #ifdef IPSEC
568 if (af == PF_KEY || af == AF_UNSPEC)
569 for (tp = pfkeyprotox; tp->pr_name; tp++)
570 printproto(tp, tp->pr_name);
571 #endif /*IPSEC*/
572 if (af == AF_IPX || af == AF_UNSPEC) {
573 kread(0, 0, 0);
574 for (tp = ipxprotox; tp->pr_name; tp++)
575 printproto(tp, tp->pr_name);
576 }
577 if (af == AF_APPLETALK || af == AF_UNSPEC)
578 for (tp = atalkprotox; tp->pr_name; tp++)
579 printproto(tp, tp->pr_name);
580 if (af == AF_NETGRAPH || af == AF_UNSPEC)
581 for (tp = netgraphprotox; tp->pr_name; tp++)
582 printproto(tp, tp->pr_name);
583 #ifdef NS
584 if (af == AF_NS || af == AF_UNSPEC)
585 for (tp = nsprotox; tp->pr_name; tp++)
586 printproto(tp, tp->pr_name);
587 #endif
588 #ifdef ISO
589 if (af == AF_ISO || af == AF_UNSPEC)
590 for (tp = isoprotox; tp->pr_name; tp++)
591 printproto(tp, tp->pr_name);
592 #endif
593 if ((af == AF_UNIX || af == AF_UNSPEC) && !Lflag && !sflag)
594 unixpr();
595 exit(0);
596 }
597
598 /*
599 * Print out protocol statistics or control blocks (per sflag).
600 * If the interface was not specifically requested, and the symbol
601 * is not in the namelist, ignore this one.
602 */
603 static void
604 printproto(struct protox *tp, char *name)
605 {
606 void (*pr)(u_long, char *, int);
607 u_long off;
608
609 if (sflag) {
610 if (iflag) {
611 if (tp->pr_istats)
612 intpr(interval, nl[N_IFNET].n_value,
613 tp->pr_istats);
614 else if (pflag)
615 printf("%s: no per-interface stats routine\n",
616 tp->pr_name);
617 return;
618 }
619 else {
620 pr = tp->pr_stats;
621 if (!pr) {
622 if (pflag)
623 printf("%s: no stats routine\n",
624 tp->pr_name);
625 return;
626 }
627 off = tp->pr_usesysctl ? tp->pr_usesysctl
628 : nl[tp->pr_sindex].n_value;
629 }
630 } else {
631 pr = tp->pr_cblocks;
632 if (!pr) {
633 if (pflag)
634 printf("%s: no PCB routine\n", tp->pr_name);
635 return;
636 }
637 off = tp->pr_usesysctl ? tp->pr_usesysctl
638 : nl[tp->pr_index].n_value;
639 }
640 if (pr != NULL && (off || af != AF_UNSPEC))
641 (*pr)(off, name, af);
642 }
643
644 /*
645 * Read kernel memory, return 0 on success.
646 */
647 int
648 kread(u_long addr, char *buf, int size)
649 {
650 if (kvmd == 0) {
651 /*
652 * XXX.
653 */
654 kvmd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, buf);
655 if (kvmd != NULL) {
656 if (kvm_nlist(kvmd, nl) < 0) {
657 if(nlistf)
658 errx(1, "%s: kvm_nlist: %s", nlistf,
659 kvm_geterr(kvmd));
660 else
661 errx(1, "kvm_nlist: %s", kvm_geterr(kvmd));
662 }
663
664 if (nl[0].n_type == 0) {
665 if(nlistf)
666 errx(1, "%s: no namelist", nlistf);
667 else
668 errx(1, "no namelist");
669 }
670 } else {
671 warnx("kvm not available");
672 return(-1);
673 }
674 }
675 if (!buf)
676 return (0);
677 if (kvm_read(kvmd, addr, buf, size) != size) {
678 warnx("%s", kvm_geterr(kvmd));
679 return (-1);
680 }
681 return (0);
682 }
683
684 char *
685 plural(int n)
686 {
687 return (n != 1 ? "s" : "");
688 }
689
690 char *
691 plurales(int n)
692 {
693 return (n != 1 ? "es" : "");
694 }
695
696 /*
697 * Find the protox for the given "well-known" name.
698 */
699 static struct protox *
700 knownname(char *name)
701 {
702 struct protox **tpp, *tp;
703
704 for (tpp = protoprotox; *tpp; tpp++)
705 for (tp = *tpp; tp->pr_name; tp++)
706 if (strcmp(tp->pr_name, name) == 0)
707 return (tp);
708 return (NULL);
709 }
710
711 /*
712 * Find the protox corresponding to name.
713 */
714 static struct protox *
715 name2protox(char *name)
716 {
717 struct protox *tp;
718 char **alias; /* alias from p->aliases */
719 struct protoent *p;
720
721 /*
722 * Try to find the name in the list of "well-known" names. If that
723 * fails, check if name is an alias for an Internet protocol.
724 */
725 if ((tp = knownname(name)) != NULL)
726 return (tp);
727
728 setprotoent(1); /* make protocol lookup cheaper */
729 while ((p = getprotoent()) != NULL) {
730 /* assert: name not same as p->name */
731 for (alias = p->p_aliases; *alias; alias++)
732 if (strcmp(name, *alias) == 0) {
733 endprotoent();
734 return (knownname(p->p_name));
735 }
736 }
737 endprotoent();
738 return (NULL);
739 }
740
741 static void
742 usage(void)
743 {
744 (void)fprintf(stderr, "%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n",
745 "usage: netstat [-AaLnSW] [-c cpu] [-f protocol_family | -p protocol]\n"
746 " [-M core] [-N system]",
747 " netstat -i | -I interface [-abdnt] [-f address_family]\n"
748 " [-M core] [-N system]",
749 " netstat -w wait [-I interface] [-d] [-M core] [-N system]",
750 " netstat -s [-s] [-z] [-f protocol_family | -p protocol] [-M core]",
751 " netstat -i | -I interface -s [-f protocol_family | -p protocol]\n"
752 " [-M core] [-N system]",
753 " netstat -m [-M core] [-N system]",
754 " netstat -r [-AanW] [-f address_family] [-M core] [-N system]",
755 " netstat -rs [-s] [-M core] [-N system]",
756 " netstat -g [-W] [-f address_family] [-M core] [-N system]",
757 " netstat -gs [-s] [-f address_family] [-M core] [-N system]");
758 exit(1);
759 }
DragonFly vkernel multiprocessor port