Annotation of src/usr.bin/netstat/main.c, Revision 1.75
1.75 ! claudio 1: /* $OpenBSD: main.c,v 1.74 2008/01/03 21:01:40 claudio Exp $ */
1.2 deraadt 2: /* $NetBSD: main.c,v 1.9 1996/05/07 02:55:02 thorpej Exp $ */
1.1 deraadt 3:
4: /*
5: * Copyright (c) 1983, 1988, 1993
6: * Regents of the University of California. All rights reserved.
7: *
8: * Redistribution and use in source and binary forms, with or without
9: * modification, are permitted provided that the following conditions
10: * are met:
11: * 1. Redistributions of source code must retain the above copyright
12: * notice, this list of conditions and the following disclaimer.
13: * 2. Redistributions in binary form must reproduce the above copyright
14: * notice, this list of conditions and the following disclaimer in the
15: * documentation and/or other materials provided with the distribution.
1.36 millert 16: * 3. Neither the name of the University nor the names of its contributors
1.1 deraadt 17: * may be used to endorse or promote products derived from this software
18: * without specific prior written permission.
19: *
20: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30: * SUCH DAMAGE.
31: */
32:
33: #include <sys/param.h>
34: #include <sys/file.h>
35: #include <sys/protosw.h>
36: #include <sys/socket.h>
37:
1.68 claudio 38: #include <net/route.h>
1.1 deraadt 39: #include <netinet/in.h>
40:
41: #include <ctype.h>
1.61 djm 42: #include <err.h>
1.1 deraadt 43: #include <errno.h>
44: #include <kvm.h>
45: #include <limits.h>
46: #include <netdb.h>
47: #include <nlist.h>
48: #include <paths.h>
49: #include <stdio.h>
50: #include <stdlib.h>
51: #include <string.h>
52: #include <unistd.h>
53: #include "netstat.h"
54:
55: struct nlist nl[] = {
1.71 deraadt 56: #define N_TCBTABLE 0
1.1 deraadt 57: { "_tcbtable" },
1.71 deraadt 58: #define N_UDBTABLE 1
1.1 deraadt 59: { "_udbtable" },
1.71 deraadt 60: #define N_DDPCB 2
61: { "_ddpcb"},
1.74 claudio 62: #define N_UNIXSW 3
1.1 deraadt 63: { "_unixsw" },
1.71 deraadt 64:
1.74 claudio 65: #define N_MFCHASHTBL 4
1.1 deraadt 66: { "_mfchashtbl" },
1.74 claudio 67: #define N_MFCHASH 5
1.1 deraadt 68: { "_mfchash" },
1.74 claudio 69: #define N_VIFTABLE 6
1.1 deraadt 70: { "_viftable" },
1.71 deraadt 71:
1.74 claudio 72: #define N_MF6CTABLE 7
1.19 itojun 73: { "_mf6ctable" },
1.74 claudio 74: #define N_MIF6TABLE 8
1.19 itojun 75: { "_mif6table" },
1.71 deraadt 76:
1.74 claudio 77: #define N_RTREE 9
1.71 deraadt 78: { "_rt_tables"},
1.74 claudio 79: #define N_RTMASK 10
1.71 deraadt 80: { "_mask_rnhead" },
1.74 claudio 81: #define N_AF2RTAFIDX 11
1.71 deraadt 82: { "_af2rtafidx" },
1.74 claudio 83: #define N_RTBLIDMAX 12
1.71 deraadt 84: { "_rtbl_id_max" },
85:
1.74 claudio 86: #define N_RAWIPTABLE 13
1.40 markus 87: { "_rawcbtable" },
1.74 claudio 88: #define N_RAWIP6TABLE 14
1.40 markus 89: { "_rawin6pcbtable" },
1.71 deraadt 90:
1.55 deraadt 91: { ""}
1.1 deraadt 92: };
93:
94: struct protox {
1.38 deraadt 95: u_char pr_index; /* index into nlist of cb head */
96: void (*pr_cblocks)(u_long, char *); /* control blocks printing routine */
1.71 deraadt 97: void (*pr_stats)(char *); /* statistics printing routine */
1.59 markus 98: void (*pr_dump)(u_long); /* pcb printing routine */
1.38 deraadt 99: char *pr_name; /* well-known name */
1.1 deraadt 100: } protox[] = {
1.71 deraadt 101: { N_TCBTABLE, protopr, tcp_stats, tcp_dump, "tcp" },
102: { N_UDBTABLE, protopr, udp_stats, NULL, "udp" },
103: { N_RAWIPTABLE, protopr, ip_stats, NULL, "ip" },
104: { -1, NULL, icmp_stats, NULL, "icmp" },
105: { -1, NULL, igmp_stats, NULL, "igmp" },
106: { -1, NULL, ah_stats, NULL, "ah" },
107: { -1, NULL, esp_stats, NULL, "esp" },
108: { -1, NULL, ipip_stats, NULL, "ipencap" },
109: { -1, NULL, etherip_stats, NULL, "etherip" },
110: { -1, NULL, ipcomp_stats, NULL, "ipcomp" },
111: { -1, NULL, carp_stats, NULL, "carp" },
112: { -1, NULL, pfsync_stats, NULL, "pfsync" },
113: { -1, NULL, pim_stats, NULL, "pim" },
114: { -1, NULL, NULL, NULL, NULL }
1.1 deraadt 115: };
116:
1.19 itojun 117: struct protox ip6protox[] = {
1.71 deraadt 118: { N_TCBTABLE, ip6protopr, NULL, tcp_dump, "tcp" },
119: { N_UDBTABLE, ip6protopr, NULL, NULL, "udp" },
120: { N_RAWIP6TABLE,ip6protopr, ip6_stats, NULL, "ip6" },
121: { -1, NULL, icmp6_stats, NULL, "icmp6" },
122: { -1, NULL, pim6_stats, NULL, "pim6" },
123: { -1, NULL, rip6_stats, NULL, "rip6" },
124: { -1, NULL, NULL, NULL, NULL }
1.19 itojun 125: };
126:
1.12 denny 127: struct protox atalkprotox[] = {
1.71 deraadt 128: { N_DDPCB, atalkprotopr, ddp_stats, NULL, "ddp" },
129: { -1, NULL, NULL, NULL, NULL }
1.12 denny 130: };
131:
1.34 deraadt 132: struct protox *protoprotox[] = {
1.66 henning 133: protox, ip6protox, atalkprotox, NULL
1.34 deraadt 134: };
1.1 deraadt 135:
1.30 millert 136: static void printproto(struct protox *, char *);
137: static void usage(void);
138: static struct protox *name2protox(char *);
139: static struct protox *knownname(char *);
1.1 deraadt 140:
141: kvm_t *kvmd;
142:
143: int
1.34 deraadt 144: main(int argc, char *argv[])
1.1 deraadt 145: {
146: extern char *optarg;
147: extern int optind;
1.68 claudio 148: const char *errstr;
1.28 mpech 149: struct protoent *p;
150: struct protox *tp = NULL; /* for printing cblocks & stats */
1.1 deraadt 151: int ch;
1.59 markus 152: char *nlistf = NULL, *memf = NULL, *ep;
1.1 deraadt 153: char buf[_POSIX2_LINE_MAX];
1.61 djm 154: gid_t gid;
1.59 markus 155: u_long pcbaddr = 0;
1.68 claudio 156: u_int tableid = 0;
1.1 deraadt 157:
158: af = AF_UNSPEC;
159:
1.68 claudio 160: while ((ch = getopt(argc, argv, "AabdFf:gI:ilM:mN:np:P:qrsT:tuvW:w:")) != -1)
1.31 deraadt 161: switch (ch) {
1.1 deraadt 162: case 'A':
163: Aflag = 1;
164: break;
165: case 'a':
166: aflag = 1;
1.24 camield 167: break;
168: case 'b':
169: bflag = 1;
1.1 deraadt 170: break;
171: case 'd':
172: dflag = 1;
1.64 pyr 173: break;
174: case 'F':
175: Fflag = 1;
1.1 deraadt 176: break;
177: case 'f':
1.4 mickey 178: if (strcmp(optarg, "inet") == 0)
1.1 deraadt 179: af = AF_INET;
1.19 itojun 180: else if (strcmp(optarg, "inet6") == 0)
181: af = AF_INET6;
1.7 kstailey 182: else if (strcmp(optarg, "local") == 0)
183: af = AF_LOCAL;
1.1 deraadt 184: else if (strcmp(optarg, "unix") == 0)
185: af = AF_UNIX;
1.10 angelos 186: else if (strcmp(optarg, "encap") == 0)
1.16 angelos 187: af = PF_KEY;
1.12 denny 188: else if (strcmp(optarg, "atalk") == 0)
189: af = AF_APPLETALK;
1.75 ! claudio 190: else if (strcmp(optarg, "mpls") == 0)
! 191: af = AF_MPLS;
1.63 claudio 192: else if (strcmp(optarg, "mask") == 0)
193: af = 0xff;
1.1 deraadt 194: else {
195: (void)fprintf(stderr,
196: "%s: %s: unknown address family\n",
1.2 deraadt 197: __progname, optarg);
1.1 deraadt 198: exit(1);
199: }
200: break;
201: case 'g':
202: gflag = 1;
203: break;
1.2 deraadt 204: case 'I':
1.1 deraadt 205: iflag = 1;
1.2 deraadt 206: interface = optarg;
1.1 deraadt 207: break;
208: case 'i':
209: iflag = 1;
210: break;
1.19 itojun 211: case 'l':
212: lflag = 1;
213: break;
1.1 deraadt 214: case 'M':
215: memf = optarg;
216: break;
217: case 'm':
218: mflag = 1;
219: break;
220: case 'N':
221: nlistf = optarg;
222: break;
223: case 'n':
224: nflag = 1;
225: break;
226: case 'p':
227: if ((tp = name2protox(optarg)) == NULL) {
228: (void)fprintf(stderr,
1.42 jmc 229: "%s: %s: unknown protocol\n",
1.2 deraadt 230: __progname, optarg);
1.1 deraadt 231: exit(1);
232: }
233: pflag = 1;
1.27 brian 234: break;
1.59 markus 235: case 'P':
236: errno = 0;
237: pcbaddr = strtoul(optarg, &ep, 16);
238: if (optarg[0] == '\0' || *ep != '\0' ||
239: errno == ERANGE) {
240: (void)fprintf(stderr,
241: "%s: %s: invalid PCB address\n",
242: __progname, optarg);
243: exit(1);
244: }
245: Pflag = 1;
246: break;
1.27 brian 247: case 'q':
248: qflag = 1;
1.1 deraadt 249: break;
250: case 'r':
251: rflag = 1;
1.46 cedric 252: break;
1.1 deraadt 253: case 's':
254: ++sflag;
255: break;
1.68 claudio 256: case 'T':
257: tableid = strtonum(optarg, 0, RT_TABLEID_MAX, &errstr);
258: if (errstr)
259: errx(1, "invalid table id: %s", errstr);
260: break;
1.1 deraadt 261: case 't':
262: tflag = 1;
263: break;
264: case 'u':
265: af = AF_UNIX;
1.13 peter 266: break;
267: case 'v':
268: vflag = 1;
1.1 deraadt 269: break;
1.56 reyk 270: case 'W':
271: Wflag = 1;
272: interface = optarg;
273: break;
1.1 deraadt 274: case 'w':
275: interval = atoi(optarg);
276: iflag = 1;
277: break;
278: case '?':
279: default:
280: usage();
281: }
282: argv += optind;
283: argc -= optind;
284:
1.33 deraadt 285: /*
1.56 reyk 286: * Show per-interface statistics which don't need access to
287: * kernel memory (they're using IOCTLs)
288: */
289: if (Wflag) {
290: if (interface == NULL)
291: usage();
292: net80211_ifstats(interface);
293: exit(0);
294: }
295:
296: /*
1.33 deraadt 297: * Discard setgid privileges if not the running kernel so that bad
298: * guys can't print interesting stuff from kernel memory.
1.59 markus 299: * Dumping PCB info is also restricted.
1.33 deraadt 300: */
1.61 djm 301: gid = getgid();
302: if (nlistf != NULL || memf != NULL || Pflag)
303: if (setresgid(gid, gid, gid) == -1)
304: err(1, "setresgid");
1.73 claudio 305:
1.33 deraadt 306: if ((kvmd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY,
307: buf)) == NULL) {
308: fprintf(stderr, "%s: kvm_open: %s\n", __progname, buf);
309: exit(1);
310: }
1.61 djm 311:
312: if (nlistf == NULL && memf == NULL && !Pflag)
313: if (setresgid(gid, gid, gid) == -1)
314: err(1, "setresgid");
1.33 deraadt 315:
1.1 deraadt 316: #define BACKWARD_COMPATIBILITY
317: #ifdef BACKWARD_COMPATIBILITY
318: if (*argv) {
319: if (isdigit(**argv)) {
320: interval = atoi(*argv);
321: if (interval <= 0)
322: usage();
323: ++argv;
324: iflag = 1;
325: }
326: if (*argv) {
327: nlistf = *argv;
328: if (*++argv)
329: memf = *argv;
330: }
331: }
332: #endif
1.14 deraadt 333:
1.1 deraadt 334: if (kvm_nlist(kvmd, nl) < 0 || nl[0].n_type == 0) {
335: if (nlistf)
1.2 deraadt 336: fprintf(stderr, "%s: %s: no namelist\n", __progname,
337: nlistf);
1.1 deraadt 338: else
1.2 deraadt 339: fprintf(stderr, "%s: no namelist\n", __progname);
1.1 deraadt 340: exit(1);
341: }
342: if (mflag) {
1.70 deraadt 343: mbpr();
1.1 deraadt 344: exit(0);
345: }
346: if (pflag) {
1.45 markus 347: printproto(tp, tp->pr_name);
1.59 markus 348: exit(0);
349: }
350: if (Pflag) {
351: if (tp == NULL && (tp = name2protox("tcp")) == NULL) {
352: (void)fprintf(stderr,
353: "%s: %s: unknown protocol\n",
354: __progname, "tcp");
355: exit(1);
356: }
357: if (tp->pr_dump)
358: (tp->pr_dump)(pcbaddr);
1.1 deraadt 359: exit(0);
360: }
361: /*
362: * Keep file descriptors open to avoid overhead
363: * of open/close on each call to get* routines.
364: */
365: sethostent(1);
366: setnetent(1);
1.71 deraadt 367:
1.1 deraadt 368: if (iflag) {
1.74 claudio 369: intpr(interval);
1.1 deraadt 370: exit(0);
371: }
372: if (rflag) {
373: if (sflag)
1.73 claudio 374: rt_stats();
375: else if (Aflag || nlistf != NULL || memf != NULL)
1.63 claudio 376: routepr(nl[N_RTREE].n_value, nl[N_RTMASK].n_value,
377: nl[N_AF2RTAFIDX].n_value, nl[N_RTBLIDMAX].n_value);
1.73 claudio 378: else
379: p_rttables(af, tableid);
1.1 deraadt 380: exit(0);
381: }
382: if (gflag) {
1.19 itojun 383: if (sflag) {
384: if (af == AF_INET || af == AF_UNSPEC)
1.71 deraadt 385: mrt_stats();
1.19 itojun 386: if (af == AF_INET6 || af == AF_UNSPEC)
1.71 deraadt 387: mrt6_stats();
1.70 deraadt 388: } else {
1.19 itojun 389: if (af == AF_INET || af == AF_UNSPEC)
1.71 deraadt 390: mroutepr(nl[N_MFCHASHTBL].n_value,
1.19 itojun 391: nl[N_MFCHASH].n_value,
392: nl[N_VIFTABLE].n_value);
393: if (af == AF_INET6 || af == AF_UNSPEC)
1.71 deraadt 394: mroute6pr(nl[N_MF6CTABLE].n_value,
1.19 itojun 395: nl[N_MIF6TABLE].n_value);
396: }
1.1 deraadt 397: exit(0);
398: }
399: if (af == AF_INET || af == AF_UNSPEC) {
400: setprotoent(1);
401: setservent(1);
402: /* ugh, this is O(MN) ... why do we do this? */
1.11 millert 403: while ((p = getprotoent())) {
1.1 deraadt 404: for (tp = protox; tp->pr_name; tp++)
405: if (strcmp(tp->pr_name, p->p_name) == 0)
406: break;
1.71 deraadt 407: if (tp->pr_name == 0)
1.1 deraadt 408: continue;
409: printproto(tp, p->p_name);
410: }
411: endprotoent();
412: }
1.19 itojun 413: if (af == AF_INET6 || af == AF_UNSPEC)
414: for (tp = ip6protox; tp->pr_name; tp++)
415: printproto(tp, tp->pr_name);
1.1 deraadt 416: if ((af == AF_UNIX || af == AF_UNSPEC) && !sflag)
417: unixpr(nl[N_UNIXSW].n_value);
1.12 denny 418: if (af == AF_APPLETALK || af == AF_UNSPEC)
419: for (tp = atalkprotox; tp->pr_name; tp++)
420: printproto(tp, tp->pr_name);
1.1 deraadt 421: exit(0);
422: }
423:
424: /*
425: * Print out protocol statistics or control blocks (per sflag).
426: * If the interface was not specifically requested, and the symbol
427: * is not in the namelist, ignore this one.
428: */
429: static void
1.34 deraadt 430: printproto(struct protox *tp, char *name)
1.1 deraadt 431: {
432: if (sflag) {
1.71 deraadt 433: if (tp->pr_stats != NULL)
434: (*tp->pr_stats)(name);
1.1 deraadt 435: } else {
1.71 deraadt 436: u_char i = tp->pr_index;
437: if (tp->pr_cblocks != NULL &&
438: i < sizeof(nl) / sizeof(nl[0]) &&
439: (nl[i].n_value || af != AF_UNSPEC))
440: (*tp->pr_cblocks)(nl[i].n_value, name);
1.1 deraadt 441: }
442: }
443:
444: /*
445: * Read kernel memory, return 0 on success.
446: */
447: int
1.53 jaredy 448: kread(u_long addr, void *buf, int size)
1.1 deraadt 449: {
450:
451: if (kvm_read(kvmd, addr, buf, size) != size) {
1.2 deraadt 452: (void)fprintf(stderr, "%s: %s\n", __progname,
1.1 deraadt 453: kvm_geterr(kvmd));
454: return (-1);
455: }
456: return (0);
457: }
458:
459: char *
1.34 deraadt 460: plural(int n)
1.1 deraadt 461: {
462: return (n != 1 ? "s" : "");
463: }
464:
465: char *
1.34 deraadt 466: plurales(int n)
1.1 deraadt 467: {
468: return (n != 1 ? "es" : "");
469: }
470:
471: /*
472: * Find the protox for the given "well-known" name.
473: */
474: static struct protox *
1.34 deraadt 475: knownname(char *name)
1.1 deraadt 476: {
477: struct protox **tpp, *tp;
478:
479: for (tpp = protoprotox; *tpp; tpp++)
480: for (tp = *tpp; tp->pr_name; tp++)
481: if (strcmp(tp->pr_name, name) == 0)
482: return (tp);
483: return (NULL);
484: }
485:
486: /*
487: * Find the protox corresponding to name.
488: */
489: static struct protox *
1.34 deraadt 490: name2protox(char *name)
1.1 deraadt 491: {
492: struct protox *tp;
493: char **alias; /* alias from p->aliases */
494: struct protoent *p;
495:
496: /*
497: * Try to find the name in the list of "well-known" names. If that
498: * fails, check if name is an alias for an Internet protocol.
499: */
1.11 millert 500: if ((tp = knownname(name)))
1.1 deraadt 501: return (tp);
502:
503: setprotoent(1); /* make protocol lookup cheaper */
1.11 millert 504: while ((p = getprotoent())) {
1.1 deraadt 505: /* assert: name not same as p->name */
506: for (alias = p->p_aliases; *alias; alias++)
507: if (strcmp(name, *alias) == 0) {
508: endprotoent();
509: return (knownname(p->p_name));
510: }
511: }
512: endprotoent();
513: return (NULL);
514: }
515:
516: static void
1.34 deraadt 517: usage(void)
1.1 deraadt 518: {
519: (void)fprintf(stderr,
1.60 jaredy 520: "usage: %s [-Aan] [-f address_family] [-M core] [-N system]\n"
1.69 sobrado 521: " %s [-bdFgilmnqrstu] [-f address_family] [-M core] [-N system]\n"
522: " [-T tableid]\n"
1.60 jaredy 523: " %s [-bdn] [-I interface] [-M core] [-N system] [-w wait]\n"
524: " %s [-M core] [-N system] -P pcbaddr\n"
525: " %s [-s] [-M core] [-N system] [-p protocol]\n"
526: " %s [-a] [-f address_family] [-i | -I interface]\n"
527: " %s [-W interface]\n",
528: __progname, __progname, __progname, __progname,
529: __progname, __progname, __progname);
1.1 deraadt 530: exit(1);
531: }
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