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 const 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
41#if 0
42static char sccsid[] = "@(#)main.c 8.4 (Berkeley) 3/1/94";
43#endif
44static const char rcsid[] =
45 "$FreeBSD: head/usr.bin/netstat/main.c 54263 1999-12-07 17:39:16Z shin $";
46#endif /* not lint */
47
48#include <sys/param.h>
49#include <sys/file.h>
50#include <sys/protosw.h>
51#include <sys/socket.h>
52
53#include <netinet/in.h>
54
55#include <netgraph/ng_socket.h>
56
57#include <ctype.h>
58#include <err.h>
59#include <errno.h>
60#include <kvm.h>
61#include <limits.h>
62#include <netdb.h>
63#include <nlist.h>
64#include <paths.h>
65#include <stdio.h>
66#include <stdlib.h>
67#include <string.h>
68#include <unistd.h>
69#include "netstat.h"
70
71static struct nlist nl[] = {
72#define N_IFNET 0
73 { "_ifnet" },
74#define N_IMP 1
75 { "_imp_softc" },
76#define N_RTSTAT 2
77 { "_rtstat" },
78#define N_UNIXSW 3
79 { "_localsw" },
80#define N_IDP 4
81 { "_nspcb"},
82#define N_IDPSTAT 5
83 { "_idpstat"},
84#define N_SPPSTAT 6
85 { "_spp_istat"},
86#define N_NSERR 7
87 { "_ns_errstat"},
88#define N_CLNPSTAT 8
89 { "_clnp_stat"},
90#define IN_NOTUSED 9
91 { "_tp_inpcb" },
92#define ISO_TP 10
93 { "_tp_refinfo" },
94#define N_TPSTAT 11
95 { "_tp_stat" },
96#define N_ESISSTAT 12
97 { "_esis_stat"},
98#define N_NIMP 13
99 { "_nimp"},
100#define N_RTREE 14
101 { "_rt_tables"},
102#define N_CLTP 15
103 { "_cltb"},
104#define N_CLTPSTAT 16
105 { "_cltpstat"},
106#define N_NFILE 17
107 { "_nfile" },
108#define N_FILE 18
109 { "_file" },
110#define N_MRTSTAT 19
111 { "_mrtstat" },
112#define N_MFCTABLE 20
113 { "_mfctable" },
114#define N_VIFTABLE 21
115 { "_viftable" },
116#define N_IPX 22
117 { "_ipxpcb"},
118#define N_IPXSTAT 23
119 { "_ipxstat"},
120#define N_SPXSTAT 24
121 { "_spx_istat"},
122#define N_DDPSTAT 25
123 { "_ddpstat"},
124#define N_DDPCB 26
125 { "_ddpcb"},
126#define N_NGSOCKS 27
127 { "_ngsocklist"},
128#define N_IP6STAT 28
129 { "_ip6stat" },
130#define N_ICMP6STAT 29
131 { "_icmp6stat" },
132#ifdef notyet
133#define N_IPSECSTAT 30
134 { "_ipsecstat" },
135#define N_IPSEC6STAT 31
136 { "_ipsec6stat" },
137#define N_PIM6STAT 32
138 { "_pim6stat" },
139#define N_MRT6PROTO 33
140 { "_ip6_mrtproto" },
141#define N_MRT6STAT 34
142 { "_mrt6stat" },
143#define N_MF6CTABLE 35
144 { "_mf6ctable" },
145#define N_MIF6TABLE 36
146 { "_mif6table" },
147#endif
148 { "" },
149};
150
151struct protox {
152 u_char pr_index; /* index into nlist of cb head */
153 u_char pr_sindex; /* index into nlist of stat block */
154 u_char pr_wanted; /* 1 if wanted, 0 otherwise */
155 void (*pr_cblocks)(); /* control blocks printing routine */
156 void (*pr_stats)(); /* statistics printing routine */
157 void (*pr_istats)(); /* per/if statistics printing routine */
158 char *pr_name; /* well-known name */
159 int pr_usesysctl; /* true if we use sysctl, not kvm */
160} protox[] = {
161 { -1, -1, 1, protopr,
162 tcp_stats, NULL, "tcp", IPPROTO_TCP },
163 { -1, -1, 1, protopr,
164 udp_stats, NULL, "udp", IPPROTO_UDP },
165 { -1, -1, 1, protopr,
166 NULL, NULL, "divert",IPPROTO_DIVERT },
167 { -1, -1, 1, protopr,
168 ip_stats, NULL, "ip", IPPROTO_RAW },
169 { -1, -1, 1, protopr,
170 icmp_stats, NULL, "icmp", IPPROTO_ICMP },
171 { -1, -1, 1, protopr,
172 igmp_stats, NULL, "igmp", IPPROTO_IGMP },
173#ifdef IPSEC
174 { -1, N_IPSECSTAT, 1, 0,
175 ipsec_stats, NULL, "ipsec", 0},
176#endif
177 { -1, -1, 1, protopr,
178 bdg_stats, NULL, "bdg", 1 /* bridging... */ },
179 { -1, -1, 0, 0,
180 0, NULL, 0 }
181};
182
183#ifdef INET6
184struct protox ip6protox[] = {
185 { -1, -1, 1, protopr,
186 tcp_stats, NULL, "tcp", IPPROTO_TCP },
187 { -1, -1, 1, protopr,
188 udp_stats, NULL, "udp", IPPROTO_UDP },
189 { -1, N_IP6STAT, 1, 0,
190 ip6_stats, ip6_ifstats, "ip6", 0 },
191 { -1, N_ICMP6STAT, 1, 0,
192 icmp6_stats, icmp6_ifstats, "icmp6",0 },
193#ifdef IPSEC
194 { -1, N_IPSEC6STAT, 1, 0,
195 ipsec_stats, NULL, "ipsec6",0 },
196#endif
197#ifdef notyet
198 { -1, N_PIM6STAT, 1, 0,
199 pim6_stats, NULL, "pim6", 0 },
200#endif
201 { -1, -1, 1, protopr,
202 bdg_stats, NULL, "bdg", 1 /* bridging... */ },
203 { -1, -1, 0, 0,
204 0, NULL, 0, 0 }
205};
206#endif /*INET6*/
207
208struct protox atalkprotox[] = {
209 { N_DDPCB, N_DDPSTAT, 1, atalkprotopr,
210 ddp_stats, NULL, "ddp" },
211 { -1, -1, 0, 0,
212 0, NULL, 0 }
213};
214
215struct protox netgraphprotox[] = {
216 { N_NGSOCKS, -1, 1, netgraphprotopr,
217 NULL, NULL, "ctrl" },
218 { N_NGSOCKS, -1, 1, netgraphprotopr,
219 NULL, NULL, "data" },
220 { -1, NULL, 0, 0,
221 0, NULL, 0 }
222};
223
224struct protox ipxprotox[] = {
225 { N_IPX, N_IPXSTAT, 1, ipxprotopr,
226 ipx_stats, NULL, "ipx", 0 },
227 { N_IPX, N_SPXSTAT, 1, ipxprotopr,
228 spx_stats, NULL, "spx", 0 },
229 { -1, -1, 0, 0,
230 0, NULL, 0, 0 }
231};
232
233#ifdef NS
234struct protox nsprotox[] = {
235 { N_IDP, N_IDPSTAT, 1, nsprotopr,
236 idp_stats, NULL, "idp" },
237 { N_IDP, N_SPPSTAT, 1, nsprotopr,
238 spp_stats, NULL, "spp" },
239 { -1, N_NSERR, 1, 0,
240 nserr_stats, NULL, "ns_err" },
241 { -1, -1, 0, 0,
242 0, NULL, 0 }
243};
244#endif
245
246#ifdef ISO
247struct protox isoprotox[] = {
248 { ISO_TP, N_TPSTAT, 1, iso_protopr,
249 tp_stats, NULL, "tp" },
250 { N_CLTP, N_CLTPSTAT, 1, iso_protopr,
251 cltp_stats, NULL, "cltp" },
252 { -1, N_CLNPSTAT, 1, 0,
253 clnp_stats, NULL, "clnp"},
254 { -1, N_ESISSTAT, 1, 0,
255 esis_stats, NULL, "esis"},
256 { -1, -1, 0, 0,
257 0, NULL, 0 }
258};
259#endif
260
261struct protox *protoprotox[] = {
262 protox,
263#ifdef INET6
264 ip6protox,
265#endif
266 ipxprotox, atalkprotox,
267#ifdef NS
268 nsprotox,
269#endif
270#ifdef ISO
271 isoprotox,
272#endif
273 NULL };
274
275static void printproto __P((struct protox *, char *));
276static void usage __P((void));
277static struct protox *name2protox __P((char *));
278static struct protox *knownname __P((char *));
279
280static kvm_t *kvmd;
281char *nlistf = NULL, *memf = NULL;
282
283int
284main(argc, argv)
285 int argc;
286 char *argv[];
287{
288 register struct protox *tp = NULL; /* for printing cblocks & stats */
289 int ch;
290
291 af = AF_UNSPEC;
292
293 while ((ch = getopt(argc, argv, "Aabdf:ghI:liM:mN:np:rstuw:")) != -1)
294 switch(ch) {
295 case 'A':
296 Aflag = 1;
297 break;
298 case 'a':
299 aflag = 1;
300 break;
301 case 'b':
302 bflag = 1;
303 break;
304 case 'd':
305 dflag = 1;
306 break;
307 case 'f':
308#ifdef NS
309 if (strcmp(optarg, "ns") == 0)
310 af = AF_NS;
311 else
312#endif
313 if (strcmp(optarg, "ipx") == 0)
314 af = AF_IPX;
315 else if (strcmp(optarg, "inet") == 0)
316 af = AF_INET;
317#ifdef INET6
318 else if (strcmp(optarg, "inet6") == 0)
319 af = AF_INET6;
320#endif /*INET6*/
321 else if (strcmp(optarg, "unix") == 0)
322 af = AF_UNIX;
323 else if (strcmp(optarg, "atalk") == 0)
324 af = AF_APPLETALK;
325 else if (strcmp(optarg, "ng") == 0
326 || strcmp(optarg, "netgraph") == 0)
327 af = AF_NETGRAPH;
328#ifdef ISO
329 else if (strcmp(optarg, "iso") == 0)
330 af = AF_ISO;
331#endif
332 else {
333 errx(1, "%s: unknown address family", optarg);
334 }
335 break;
336 case 'g':
337 gflag = 1;
338 break;
339 case 'I': {
340 char *cp;
341
342 iflag = 1;
343 for (cp = interface = optarg; isalpha(*cp); cp++)
344 continue;
345 unit = atoi(cp);
346 break;
347 }
348 case 'i':
349 iflag = 1;
350 break;
351 case 'l':
352 lflag = 1;
353 break;
354 case 'M':
355 memf = optarg;
356 break;
357 case 'm':
358 mflag = 1;
359 break;
360 case 'N':
361 nlistf = optarg;
362 break;
363 case 'n':
364 nflag = 1;
365 break;
366 case 'p':
367 if ((tp = name2protox(optarg)) == NULL) {
368 errx(1,
369 "%s: unknown or uninstrumented protocol",
370 optarg);
371 }
372 pflag = 1;
373 break;
374 case 'r':
375 rflag = 1;
376 break;
377 case 's':
378 ++sflag;
379 break;
380 case 't':
381 tflag = 1;
382 break;
383 case 'u':
384 af = AF_UNIX;
385 break;
386 case 'w':
387 interval = atoi(optarg);
388 iflag = 1;
389 break;
390 case '?':
391 default:
392 usage();
393 }
394 argv += optind;
395 argc -= optind;
396
397#define BACKWARD_COMPATIBILITY
398#ifdef BACKWARD_COMPATIBILITY
399 if (*argv) {
400 if (isdigit(**argv)) {
401 interval = atoi(*argv);
402 if (interval <= 0)
403 usage();
404 ++argv;
405 iflag = 1;
406 }
407 if (*argv) {
408 nlistf = *argv;
409 if (*++argv)
410 memf = *argv;
411 }
412 }
413#endif
414
415 /*
416 * Discard setgid privileges if not the running kernel so that bad
417 * guys can't print interesting stuff from kernel memory.
418 */
419 if (nlistf != NULL || memf != NULL)
420 setgid(getgid());
421
422 if (mflag) {
423 mbpr();
424 exit(0);
425 }
426 if (pflag) {
427 if (iflag && tp->pr_istats) {
428 kread(0, 0, 0);
429 intpr(interval, nl[N_IFNET].n_value, tp->pr_istats);
430 exit(0);
431 }
432 if (!tp->pr_stats) {
433 printf("%s: no stats routine\n", tp->pr_name);
434 exit(0);
435 }
436 if (tp->pr_usesysctl) {
437 (*tp->pr_stats)(tp->pr_usesysctl, tp->pr_name);
438 } else {
439 kread(0, 0, 0);
440 (*tp->pr_stats)(nl[tp->pr_sindex].n_value,
441 tp->pr_name);
442 }
443 exit(0);
444 }
445#if 0
446 /*
447 * Keep file descriptors open to avoid overhead
448 * of open/close on each call to get* routines.
449 */
450 sethostent(1);
451 setnetent(1);
452#else
453 /*
454 * This does not make sense any more with DNS being default over
455 * the files. Doing a setXXXXent(1) causes a tcp connection to be
456 * used for the queries, which is slower.
457 */
458#endif
459 if (iflag) {
460 if (af != AF_UNSPEC)
461 goto protostat;
462
463 kread(0, 0, 0);
464 intpr(interval, nl[N_IFNET].n_value, NULL);
465 exit(0);
466 }
467 if (rflag) {
468 kread(0, 0, 0);
469 if (sflag)
470 rt_stats(nl[N_RTSTAT].n_value);
471 else
472 routepr(nl[N_RTREE].n_value);
473 exit(0);
474 }
475 if (gflag) {
476 kread(0, 0, 0);
477 if (sflag) {
478 if (af == AF_INET || af == AF_UNSPEC)
479 mrt_stats(nl[N_MRTSTAT].n_value);
480#ifdef INET6
481#ifdef notyet
482 if (af == AF_INET6 || af == AF_UNSPEC)
483 mrt6_stats(nl[N_MRT6STAT].n_value);
484#endif
485#endif
486 } else {
487 if (af == AF_INET || af == AF_UNSPEC)
488 mroutepr(nl[N_MFCTABLE].n_value,
489 nl[N_VIFTABLE].n_value);
490#ifdef INET6
491#ifdef notyet
492 if (af == AF_INET6 || af == AF_UNSPEC)
493 mroute6pr(nl[N_MF6CTABLE].n_value,
494 nl[N_MIF6TABLE].n_value);
495#endif
496#endif
497 }
498 exit(0);
499 }
500
501 protostat:
502 kread(0, 0, 0);
503 if (af == AF_INET || af == AF_UNSPEC)
504 for (tp = protox; tp->pr_name; tp++)
505 printproto(tp, tp->pr_name);
506#ifdef INET6
507 if (af == AF_INET6 || af == AF_UNSPEC)
508 for (tp = ip6protox; tp->pr_name; tp++)
509 printproto(tp, tp->pr_name);
510#endif /*INET6*/
511 if (af == AF_IPX || af == AF_UNSPEC) {
512 kread(0, 0, 0);
513 for (tp = ipxprotox; tp->pr_name; tp++)
514 printproto(tp, tp->pr_name);
515 }
516 if (af == AF_APPLETALK || af == AF_UNSPEC)
517 for (tp = atalkprotox; tp->pr_name; tp++)
518 printproto(tp, tp->pr_name);
519 if (af == AF_NETGRAPH || af == AF_UNSPEC)
520 for (tp = netgraphprotox; tp->pr_name; tp++)
521 printproto(tp, tp->pr_name);
522#ifdef NS
523 if (af == AF_NS || af == AF_UNSPEC)
524 for (tp = nsprotox; tp->pr_name; tp++)
525 printproto(tp, tp->pr_name);
526#endif
527#ifdef ISO
528 if (af == AF_ISO || af == AF_UNSPEC)
529 for (tp = isoprotox; tp->pr_name; tp++)
530 printproto(tp, tp->pr_name);
531#endif
532 if ((af == AF_UNIX || af == AF_UNSPEC) && !sflag)
533 unixpr();
534 exit(0);
535}
536
537/*
538 * Print out protocol statistics or control blocks (per sflag).
539 * If the interface was not specifically requested, and the symbol
540 * is not in the namelist, ignore this one.
541 */
542static void
543printproto(tp, name)
544 register struct protox *tp;
545 char *name;
546{
547 void (*pr)();
548 u_long off;
549
550 if (sflag) {
551 if (iflag) {
552 if (tp->pr_istats)
553 intpr(interval, nl[N_IFNET].n_value,
554 tp->pr_istats);
555 return;
556 }
557 else {
558 pr = tp->pr_stats;
559 off = tp->pr_usesysctl ? tp->pr_usesysctl
560 : nl[tp->pr_sindex].n_value;
561 }
562 } else {
563 pr = tp->pr_cblocks;
564 off = tp->pr_usesysctl ? tp->pr_usesysctl
565 : nl[tp->pr_index].n_value;
566 }
567 if (pr != NULL && (off || af != AF_UNSPEC))
568 (*pr)(off, name, af);
569}
570
571/*
572 * Read kernel memory, return 0 on success.
573 */
574int
575kread(addr, buf, size)
576 u_long addr;
577 char *buf;
578 int size;
579{
580 if (kvmd == 0) {
581 /*
582 * XXX.
583 */
584 kvmd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, buf);
585 if (kvmd != NULL) {
586 if (kvm_nlist(kvmd, nl) < 0) {
587 if(nlistf)
588 errx(1, "%s: kvm_nlist: %s", nlistf,
589 kvm_geterr(kvmd));
590 else
591 errx(1, "kvm_nlist: %s", kvm_geterr(kvmd));
592 }
593
594 if (nl[0].n_type == 0) {
595 if(nlistf)
596 errx(1, "%s: no namelist", nlistf);
597 else
598 errx(1, "no namelist");
599 }
600 } else {
601 warnx("kvm not available");
602 return(-1);
603 }
604 }
605 if (!buf)
606 return (0);
607 if (kvm_read(kvmd, addr, buf, size) != size) {
608 warnx("%s", kvm_geterr(kvmd));
609 return (-1);
610 }
611 return (0);
612}
613
614char *
615plural(n)
616 int n;
617{
618 return (n != 1 ? "s" : "");
619}
620
621char *
622plurales(n)
623 int n;
624{
625 return (n != 1 ? "es" : "");
626}
627
628/*
629 * Find the protox for the given "well-known" name.
630 */
631static struct protox *
632knownname(name)
633 char *name;
634{
635 struct protox **tpp, *tp;
636
637 for (tpp = protoprotox; *tpp; tpp++)
638 for (tp = *tpp; tp->pr_name; tp++)
639 if (strcmp(tp->pr_name, name) == 0)
640 return (tp);
641 return (NULL);
642}
643
644/*
645 * Find the protox corresponding to name.
646 */
647static struct protox *
648name2protox(name)
649 char *name;
650{
651 struct protox *tp;
652 char **alias; /* alias from p->aliases */
653 struct protoent *p;
654
655 /*
656 * Try to find the name in the list of "well-known" names. If that
657 * fails, check if name is an alias for an Internet protocol.
658 */
659 if ((tp = knownname(name)) != NULL)
660 return (tp);
661
662 setprotoent(1); /* make protocol lookup cheaper */
663 while ((p = getprotoent()) != NULL) {
664 /* assert: name not same as p->name */
665 for (alias = p->p_aliases; *alias; alias++)
666 if (strcmp(name, *alias) == 0) {
667 endprotoent();
668 return (knownname(p->p_name));
669 }
670 }
671 endprotoent();
672 return (NULL);
673}
674
675static void
676usage()
677{
678 (void)fprintf(stderr, "%s\n%s\n%s\n%s\n",
679"usage: netstat [-Aan] [-f address_family] [-M core] [-N system]",
680" netstat [-abdghimnrs] [-f address_family] [-M core] [-N system]",
681" netstat [-bdn] [-I interface] [-M core] [-N system] [-w wait]",
682" netstat [-M core] [-N system] [-p protocol]");
683 exit(1);
684}
685
686void
687trimdomain(cp)
688 char *cp;
689{
690 static char domain[MAXHOSTNAMELEN + 1];
691 static int first = 1;
692 char *s;
693
694 if (first) {
695 first = 0;
696 if (gethostname(domain, MAXHOSTNAMELEN) == 0 &&
697 (s = strchr(domain, '.')))
698 (void) strcpy(domain, s + 1);
699 else
700 domain[0] = 0;
701 }
702
703 if (domain[0]) {
704 while ((cp = strchr(cp, '.'))) {
705 if (!strcasecmp(cp + 1, domain)) {
706 *cp = 0; /* hit it */
707 break;
708 } else {
709 cp++;
710 }
711 }
712 }
713}
714
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 const 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
41#if 0
42static char sccsid[] = "@(#)main.c 8.4 (Berkeley) 3/1/94";
43#endif
44static const char rcsid[] =
45 "$FreeBSD: head/usr.bin/netstat/main.c 54263 1999-12-07 17:39:16Z shin $";
46#endif /* not lint */
47
48#include <sys/param.h>
49#include <sys/file.h>
50#include <sys/protosw.h>
51#include <sys/socket.h>
52
53#include <netinet/in.h>
54
55#include <netgraph/ng_socket.h>
56
57#include <ctype.h>
58#include <err.h>
59#include <errno.h>
60#include <kvm.h>
61#include <limits.h>
62#include <netdb.h>
63#include <nlist.h>
64#include <paths.h>
65#include <stdio.h>
66#include <stdlib.h>
67#include <string.h>
68#include <unistd.h>
69#include "netstat.h"
70
71static struct nlist nl[] = {
72#define N_IFNET 0
73 { "_ifnet" },
74#define N_IMP 1
75 { "_imp_softc" },
76#define N_RTSTAT 2
77 { "_rtstat" },
78#define N_UNIXSW 3
79 { "_localsw" },
80#define N_IDP 4
81 { "_nspcb"},
82#define N_IDPSTAT 5
83 { "_idpstat"},
84#define N_SPPSTAT 6
85 { "_spp_istat"},
86#define N_NSERR 7
87 { "_ns_errstat"},
88#define N_CLNPSTAT 8
89 { "_clnp_stat"},
90#define IN_NOTUSED 9
91 { "_tp_inpcb" },
92#define ISO_TP 10
93 { "_tp_refinfo" },
94#define N_TPSTAT 11
95 { "_tp_stat" },
96#define N_ESISSTAT 12
97 { "_esis_stat"},
98#define N_NIMP 13
99 { "_nimp"},
100#define N_RTREE 14
101 { "_rt_tables"},
102#define N_CLTP 15
103 { "_cltb"},
104#define N_CLTPSTAT 16
105 { "_cltpstat"},
106#define N_NFILE 17
107 { "_nfile" },
108#define N_FILE 18
109 { "_file" },
110#define N_MRTSTAT 19
111 { "_mrtstat" },
112#define N_MFCTABLE 20
113 { "_mfctable" },
114#define N_VIFTABLE 21
115 { "_viftable" },
116#define N_IPX 22
117 { "_ipxpcb"},
118#define N_IPXSTAT 23
119 { "_ipxstat"},
120#define N_SPXSTAT 24
121 { "_spx_istat"},
122#define N_DDPSTAT 25
123 { "_ddpstat"},
124#define N_DDPCB 26
125 { "_ddpcb"},
126#define N_NGSOCKS 27
127 { "_ngsocklist"},
128#define N_IP6STAT 28
129 { "_ip6stat" },
130#define N_ICMP6STAT 29
131 { "_icmp6stat" },
132#ifdef notyet
133#define N_IPSECSTAT 30
134 { "_ipsecstat" },
135#define N_IPSEC6STAT 31
136 { "_ipsec6stat" },
137#define N_PIM6STAT 32
138 { "_pim6stat" },
139#define N_MRT6PROTO 33
140 { "_ip6_mrtproto" },
141#define N_MRT6STAT 34
142 { "_mrt6stat" },
143#define N_MF6CTABLE 35
144 { "_mf6ctable" },
145#define N_MIF6TABLE 36
146 { "_mif6table" },
147#endif
148 { "" },
149};
150
151struct protox {
152 u_char pr_index; /* index into nlist of cb head */
153 u_char pr_sindex; /* index into nlist of stat block */
154 u_char pr_wanted; /* 1 if wanted, 0 otherwise */
155 void (*pr_cblocks)(); /* control blocks printing routine */
156 void (*pr_stats)(); /* statistics printing routine */
157 void (*pr_istats)(); /* per/if statistics printing routine */
158 char *pr_name; /* well-known name */
159 int pr_usesysctl; /* true if we use sysctl, not kvm */
160} protox[] = {
161 { -1, -1, 1, protopr,
162 tcp_stats, NULL, "tcp", IPPROTO_TCP },
163 { -1, -1, 1, protopr,
164 udp_stats, NULL, "udp", IPPROTO_UDP },
165 { -1, -1, 1, protopr,
166 NULL, NULL, "divert",IPPROTO_DIVERT },
167 { -1, -1, 1, protopr,
168 ip_stats, NULL, "ip", IPPROTO_RAW },
169 { -1, -1, 1, protopr,
170 icmp_stats, NULL, "icmp", IPPROTO_ICMP },
171 { -1, -1, 1, protopr,
172 igmp_stats, NULL, "igmp", IPPROTO_IGMP },
173#ifdef IPSEC
174 { -1, N_IPSECSTAT, 1, 0,
175 ipsec_stats, NULL, "ipsec", 0},
176#endif
177 { -1, -1, 1, protopr,
178 bdg_stats, NULL, "bdg", 1 /* bridging... */ },
179 { -1, -1, 0, 0,
180 0, NULL, 0 }
181};
182
183#ifdef INET6
184struct protox ip6protox[] = {
185 { -1, -1, 1, protopr,
186 tcp_stats, NULL, "tcp", IPPROTO_TCP },
187 { -1, -1, 1, protopr,
188 udp_stats, NULL, "udp", IPPROTO_UDP },
189 { -1, N_IP6STAT, 1, 0,
190 ip6_stats, ip6_ifstats, "ip6", 0 },
191 { -1, N_ICMP6STAT, 1, 0,
192 icmp6_stats, icmp6_ifstats, "icmp6",0 },
193#ifdef IPSEC
194 { -1, N_IPSEC6STAT, 1, 0,
195 ipsec_stats, NULL, "ipsec6",0 },
196#endif
197#ifdef notyet
198 { -1, N_PIM6STAT, 1, 0,
199 pim6_stats, NULL, "pim6", 0 },
200#endif
201 { -1, -1, 1, protopr,
202 bdg_stats, NULL, "bdg", 1 /* bridging... */ },
203 { -1, -1, 0, 0,
204 0, NULL, 0, 0 }
205};
206#endif /*INET6*/
207
208struct protox atalkprotox[] = {
209 { N_DDPCB, N_DDPSTAT, 1, atalkprotopr,
210 ddp_stats, NULL, "ddp" },
211 { -1, -1, 0, 0,
212 0, NULL, 0 }
213};
214
215struct protox netgraphprotox[] = {
216 { N_NGSOCKS, -1, 1, netgraphprotopr,
217 NULL, NULL, "ctrl" },
218 { N_NGSOCKS, -1, 1, netgraphprotopr,
219 NULL, NULL, "data" },
220 { -1, NULL, 0, 0,
221 0, NULL, 0 }
222};
223
224struct protox ipxprotox[] = {
225 { N_IPX, N_IPXSTAT, 1, ipxprotopr,
226 ipx_stats, NULL, "ipx", 0 },
227 { N_IPX, N_SPXSTAT, 1, ipxprotopr,
228 spx_stats, NULL, "spx", 0 },
229 { -1, -1, 0, 0,
230 0, NULL, 0, 0 }
231};
232
233#ifdef NS
234struct protox nsprotox[] = {
235 { N_IDP, N_IDPSTAT, 1, nsprotopr,
236 idp_stats, NULL, "idp" },
237 { N_IDP, N_SPPSTAT, 1, nsprotopr,
238 spp_stats, NULL, "spp" },
239 { -1, N_NSERR, 1, 0,
240 nserr_stats, NULL, "ns_err" },
241 { -1, -1, 0, 0,
242 0, NULL, 0 }
243};
244#endif
245
246#ifdef ISO
247struct protox isoprotox[] = {
248 { ISO_TP, N_TPSTAT, 1, iso_protopr,
249 tp_stats, NULL, "tp" },
250 { N_CLTP, N_CLTPSTAT, 1, iso_protopr,
251 cltp_stats, NULL, "cltp" },
252 { -1, N_CLNPSTAT, 1, 0,
253 clnp_stats, NULL, "clnp"},
254 { -1, N_ESISSTAT, 1, 0,
255 esis_stats, NULL, "esis"},
256 { -1, -1, 0, 0,
257 0, NULL, 0 }
258};
259#endif
260
261struct protox *protoprotox[] = {
262 protox,
263#ifdef INET6
264 ip6protox,
265#endif
266 ipxprotox, atalkprotox,
267#ifdef NS
268 nsprotox,
269#endif
270#ifdef ISO
271 isoprotox,
272#endif
273 NULL };
274
275static void printproto __P((struct protox *, char *));
276static void usage __P((void));
277static struct protox *name2protox __P((char *));
278static struct protox *knownname __P((char *));
279
280static kvm_t *kvmd;
281char *nlistf = NULL, *memf = NULL;
282
283int
284main(argc, argv)
285 int argc;
286 char *argv[];
287{
288 register struct protox *tp = NULL; /* for printing cblocks & stats */
289 int ch;
290
291 af = AF_UNSPEC;
292
293 while ((ch = getopt(argc, argv, "Aabdf:ghI:liM:mN:np:rstuw:")) != -1)
294 switch(ch) {
295 case 'A':
296 Aflag = 1;
297 break;
298 case 'a':
299 aflag = 1;
300 break;
301 case 'b':
302 bflag = 1;
303 break;
304 case 'd':
305 dflag = 1;
306 break;
307 case 'f':
308#ifdef NS
309 if (strcmp(optarg, "ns") == 0)
310 af = AF_NS;
311 else
312#endif
313 if (strcmp(optarg, "ipx") == 0)
314 af = AF_IPX;
315 else if (strcmp(optarg, "inet") == 0)
316 af = AF_INET;
317#ifdef INET6
318 else if (strcmp(optarg, "inet6") == 0)
319 af = AF_INET6;
320#endif /*INET6*/
321 else if (strcmp(optarg, "unix") == 0)
322 af = AF_UNIX;
323 else if (strcmp(optarg, "atalk") == 0)
324 af = AF_APPLETALK;
325 else if (strcmp(optarg, "ng") == 0
326 || strcmp(optarg, "netgraph") == 0)
327 af = AF_NETGRAPH;
328#ifdef ISO
329 else if (strcmp(optarg, "iso") == 0)
330 af = AF_ISO;
331#endif
332 else {
333 errx(1, "%s: unknown address family", optarg);
334 }
335 break;
336 case 'g':
337 gflag = 1;
338 break;
339 case 'I': {
340 char *cp;
341
342 iflag = 1;
343 for (cp = interface = optarg; isalpha(*cp); cp++)
344 continue;
345 unit = atoi(cp);
346 break;
347 }
348 case 'i':
349 iflag = 1;
350 break;
351 case 'l':
352 lflag = 1;
353 break;
354 case 'M':
355 memf = optarg;
356 break;
357 case 'm':
358 mflag = 1;
359 break;
360 case 'N':
361 nlistf = optarg;
362 break;
363 case 'n':
364 nflag = 1;
365 break;
366 case 'p':
367 if ((tp = name2protox(optarg)) == NULL) {
368 errx(1,
369 "%s: unknown or uninstrumented protocol",
370 optarg);
371 }
372 pflag = 1;
373 break;
374 case 'r':
375 rflag = 1;
376 break;
377 case 's':
378 ++sflag;
379 break;
380 case 't':
381 tflag = 1;
382 break;
383 case 'u':
384 af = AF_UNIX;
385 break;
386 case 'w':
387 interval = atoi(optarg);
388 iflag = 1;
389 break;
390 case '?':
391 default:
392 usage();
393 }
394 argv += optind;
395 argc -= optind;
396
397#define BACKWARD_COMPATIBILITY
398#ifdef BACKWARD_COMPATIBILITY
399 if (*argv) {
400 if (isdigit(**argv)) {
401 interval = atoi(*argv);
402 if (interval <= 0)
403 usage();
404 ++argv;
405 iflag = 1;
406 }
407 if (*argv) {
408 nlistf = *argv;
409 if (*++argv)
410 memf = *argv;
411 }
412 }
413#endif
414
415 /*
416 * Discard setgid privileges if not the running kernel so that bad
417 * guys can't print interesting stuff from kernel memory.
418 */
419 if (nlistf != NULL || memf != NULL)
420 setgid(getgid());
421
422 if (mflag) {
423 mbpr();
424 exit(0);
425 }
426 if (pflag) {
427 if (iflag && tp->pr_istats) {
428 kread(0, 0, 0);
429 intpr(interval, nl[N_IFNET].n_value, tp->pr_istats);
430 exit(0);
431 }
432 if (!tp->pr_stats) {
433 printf("%s: no stats routine\n", tp->pr_name);
434 exit(0);
435 }
436 if (tp->pr_usesysctl) {
437 (*tp->pr_stats)(tp->pr_usesysctl, tp->pr_name);
438 } else {
439 kread(0, 0, 0);
440 (*tp->pr_stats)(nl[tp->pr_sindex].n_value,
441 tp->pr_name);
442 }
443 exit(0);
444 }
445#if 0
446 /*
447 * Keep file descriptors open to avoid overhead
448 * of open/close on each call to get* routines.
449 */
450 sethostent(1);
451 setnetent(1);
452#else
453 /*
454 * This does not make sense any more with DNS being default over
455 * the files. Doing a setXXXXent(1) causes a tcp connection to be
456 * used for the queries, which is slower.
457 */
458#endif
459 if (iflag) {
460 if (af != AF_UNSPEC)
461 goto protostat;
462
463 kread(0, 0, 0);
464 intpr(interval, nl[N_IFNET].n_value, NULL);
465 exit(0);
466 }
467 if (rflag) {
468 kread(0, 0, 0);
469 if (sflag)
470 rt_stats(nl[N_RTSTAT].n_value);
471 else
472 routepr(nl[N_RTREE].n_value);
473 exit(0);
474 }
475 if (gflag) {
476 kread(0, 0, 0);
477 if (sflag) {
478 if (af == AF_INET || af == AF_UNSPEC)
479 mrt_stats(nl[N_MRTSTAT].n_value);
480#ifdef INET6
481#ifdef notyet
482 if (af == AF_INET6 || af == AF_UNSPEC)
483 mrt6_stats(nl[N_MRT6STAT].n_value);
484#endif
485#endif
486 } else {
487 if (af == AF_INET || af == AF_UNSPEC)
488 mroutepr(nl[N_MFCTABLE].n_value,
489 nl[N_VIFTABLE].n_value);
490#ifdef INET6
491#ifdef notyet
492 if (af == AF_INET6 || af == AF_UNSPEC)
493 mroute6pr(nl[N_MF6CTABLE].n_value,
494 nl[N_MIF6TABLE].n_value);
495#endif
496#endif
497 }
498 exit(0);
499 }
500
501 protostat:
502 kread(0, 0, 0);
503 if (af == AF_INET || af == AF_UNSPEC)
504 for (tp = protox; tp->pr_name; tp++)
505 printproto(tp, tp->pr_name);
506#ifdef INET6
507 if (af == AF_INET6 || af == AF_UNSPEC)
508 for (tp = ip6protox; tp->pr_name; tp++)
509 printproto(tp, tp->pr_name);
510#endif /*INET6*/
511 if (af == AF_IPX || af == AF_UNSPEC) {
512 kread(0, 0, 0);
513 for (tp = ipxprotox; tp->pr_name; tp++)
514 printproto(tp, tp->pr_name);
515 }
516 if (af == AF_APPLETALK || af == AF_UNSPEC)
517 for (tp = atalkprotox; tp->pr_name; tp++)
518 printproto(tp, tp->pr_name);
519 if (af == AF_NETGRAPH || af == AF_UNSPEC)
520 for (tp = netgraphprotox; tp->pr_name; tp++)
521 printproto(tp, tp->pr_name);
522#ifdef NS
523 if (af == AF_NS || af == AF_UNSPEC)
524 for (tp = nsprotox; tp->pr_name; tp++)
525 printproto(tp, tp->pr_name);
526#endif
527#ifdef ISO
528 if (af == AF_ISO || af == AF_UNSPEC)
529 for (tp = isoprotox; tp->pr_name; tp++)
530 printproto(tp, tp->pr_name);
531#endif
532 if ((af == AF_UNIX || af == AF_UNSPEC) && !sflag)
533 unixpr();
534 exit(0);
535}
536
537/*
538 * Print out protocol statistics or control blocks (per sflag).
539 * If the interface was not specifically requested, and the symbol
540 * is not in the namelist, ignore this one.
541 */
542static void
543printproto(tp, name)
544 register struct protox *tp;
545 char *name;
546{
547 void (*pr)();
548 u_long off;
549
550 if (sflag) {
551 if (iflag) {
552 if (tp->pr_istats)
553 intpr(interval, nl[N_IFNET].n_value,
554 tp->pr_istats);
555 return;
556 }
557 else {
558 pr = tp->pr_stats;
559 off = tp->pr_usesysctl ? tp->pr_usesysctl
560 : nl[tp->pr_sindex].n_value;
561 }
562 } else {
563 pr = tp->pr_cblocks;
564 off = tp->pr_usesysctl ? tp->pr_usesysctl
565 : nl[tp->pr_index].n_value;
566 }
567 if (pr != NULL && (off || af != AF_UNSPEC))
568 (*pr)(off, name, af);
569}
570
571/*
572 * Read kernel memory, return 0 on success.
573 */
574int
575kread(addr, buf, size)
576 u_long addr;
577 char *buf;
578 int size;
579{
580 if (kvmd == 0) {
581 /*
582 * XXX.
583 */
584 kvmd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, buf);
585 if (kvmd != NULL) {
586 if (kvm_nlist(kvmd, nl) < 0) {
587 if(nlistf)
588 errx(1, "%s: kvm_nlist: %s", nlistf,
589 kvm_geterr(kvmd));
590 else
591 errx(1, "kvm_nlist: %s", kvm_geterr(kvmd));
592 }
593
594 if (nl[0].n_type == 0) {
595 if(nlistf)
596 errx(1, "%s: no namelist", nlistf);
597 else
598 errx(1, "no namelist");
599 }
600 } else {
601 warnx("kvm not available");
602 return(-1);
603 }
604 }
605 if (!buf)
606 return (0);
607 if (kvm_read(kvmd, addr, buf, size) != size) {
608 warnx("%s", kvm_geterr(kvmd));
609 return (-1);
610 }
611 return (0);
612}
613
614char *
615plural(n)
616 int n;
617{
618 return (n != 1 ? "s" : "");
619}
620
621char *
622plurales(n)
623 int n;
624{
625 return (n != 1 ? "es" : "");
626}
627
628/*
629 * Find the protox for the given "well-known" name.
630 */
631static struct protox *
632knownname(name)
633 char *name;
634{
635 struct protox **tpp, *tp;
636
637 for (tpp = protoprotox; *tpp; tpp++)
638 for (tp = *tpp; tp->pr_name; tp++)
639 if (strcmp(tp->pr_name, name) == 0)
640 return (tp);
641 return (NULL);
642}
643
644/*
645 * Find the protox corresponding to name.
646 */
647static struct protox *
648name2protox(name)
649 char *name;
650{
651 struct protox *tp;
652 char **alias; /* alias from p->aliases */
653 struct protoent *p;
654
655 /*
656 * Try to find the name in the list of "well-known" names. If that
657 * fails, check if name is an alias for an Internet protocol.
658 */
659 if ((tp = knownname(name)) != NULL)
660 return (tp);
661
662 setprotoent(1); /* make protocol lookup cheaper */
663 while ((p = getprotoent()) != NULL) {
664 /* assert: name not same as p->name */
665 for (alias = p->p_aliases; *alias; alias++)
666 if (strcmp(name, *alias) == 0) {
667 endprotoent();
668 return (knownname(p->p_name));
669 }
670 }
671 endprotoent();
672 return (NULL);
673}
674
675static void
676usage()
677{
678 (void)fprintf(stderr, "%s\n%s\n%s\n%s\n",
679"usage: netstat [-Aan] [-f address_family] [-M core] [-N system]",
680" netstat [-abdghimnrs] [-f address_family] [-M core] [-N system]",
681" netstat [-bdn] [-I interface] [-M core] [-N system] [-w wait]",
682" netstat [-M core] [-N system] [-p protocol]");
683 exit(1);
684}
685
686void
687trimdomain(cp)
688 char *cp;
689{
690 static char domain[MAXHOSTNAMELEN + 1];
691 static int first = 1;
692 char *s;
693
694 if (first) {
695 first = 0;
696 if (gethostname(domain, MAXHOSTNAMELEN) == 0 &&
697 (s = strchr(domain, '.')))
698 (void) strcpy(domain, s + 1);
699 else
700 domain[0] = 0;
701 }
702
703 if (domain[0]) {
704 while ((cp = strchr(cp, '.'))) {
705 if (!strcasecmp(cp + 1, domain)) {
706 *cp = 0; /* hit it */
707 break;
708 } else {
709 cp++;
710 }
711 }
712 }
713}
714