Annotation of src/usr.bin/netstat/main.c, Revision 1.77
1.77 ! claudio 1: /* $OpenBSD: main.c,v 1.76 2008/09/16 15:48:13 gollo 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" },
1.76 gollo 114: { -1, NULL, pflow_stats, NULL, "pflow" },
1.71 deraadt 115: { -1, NULL, NULL, NULL, NULL }
1.1 deraadt 116: };
117:
1.19 itojun 118: struct protox ip6protox[] = {
1.71 deraadt 119: { N_TCBTABLE, ip6protopr, NULL, tcp_dump, "tcp" },
120: { N_UDBTABLE, ip6protopr, NULL, NULL, "udp" },
121: { N_RAWIP6TABLE,ip6protopr, ip6_stats, NULL, "ip6" },
122: { -1, NULL, icmp6_stats, NULL, "icmp6" },
123: { -1, NULL, pim6_stats, NULL, "pim6" },
124: { -1, NULL, rip6_stats, NULL, "rip6" },
125: { -1, NULL, NULL, NULL, NULL }
1.19 itojun 126: };
127:
1.12 denny 128: struct protox atalkprotox[] = {
1.71 deraadt 129: { N_DDPCB, atalkprotopr, ddp_stats, NULL, "ddp" },
130: { -1, NULL, NULL, NULL, NULL }
1.12 denny 131: };
132:
1.34 deraadt 133: struct protox *protoprotox[] = {
1.66 henning 134: protox, ip6protox, atalkprotox, NULL
1.34 deraadt 135: };
1.1 deraadt 136:
1.30 millert 137: static void printproto(struct protox *, char *);
138: static void usage(void);
139: static struct protox *name2protox(char *);
140: static struct protox *knownname(char *);
1.1 deraadt 141:
142: kvm_t *kvmd;
143:
144: int
1.34 deraadt 145: main(int argc, char *argv[])
1.1 deraadt 146: {
147: extern char *optarg;
148: extern int optind;
1.68 claudio 149: const char *errstr;
1.28 mpech 150: struct protoent *p;
151: struct protox *tp = NULL; /* for printing cblocks & stats */
1.1 deraadt 152: int ch;
1.59 markus 153: char *nlistf = NULL, *memf = NULL, *ep;
1.1 deraadt 154: char buf[_POSIX2_LINE_MAX];
1.61 djm 155: gid_t gid;
1.59 markus 156: u_long pcbaddr = 0;
1.68 claudio 157: u_int tableid = 0;
1.1 deraadt 158:
159: af = AF_UNSPEC;
160:
1.68 claudio 161: while ((ch = getopt(argc, argv, "AabdFf:gI:ilM:mN:np:P:qrsT:tuvW:w:")) != -1)
1.31 deraadt 162: switch (ch) {
1.1 deraadt 163: case 'A':
164: Aflag = 1;
165: break;
166: case 'a':
167: aflag = 1;
1.24 camield 168: break;
169: case 'b':
170: bflag = 1;
1.1 deraadt 171: break;
172: case 'd':
173: dflag = 1;
1.64 pyr 174: break;
175: case 'F':
176: Fflag = 1;
1.1 deraadt 177: break;
178: case 'f':
1.4 mickey 179: if (strcmp(optarg, "inet") == 0)
1.1 deraadt 180: af = AF_INET;
1.19 itojun 181: else if (strcmp(optarg, "inet6") == 0)
182: af = AF_INET6;
1.7 kstailey 183: else if (strcmp(optarg, "local") == 0)
184: af = AF_LOCAL;
1.1 deraadt 185: else if (strcmp(optarg, "unix") == 0)
186: af = AF_UNIX;
1.10 angelos 187: else if (strcmp(optarg, "encap") == 0)
1.16 angelos 188: af = PF_KEY;
1.12 denny 189: else if (strcmp(optarg, "atalk") == 0)
190: af = AF_APPLETALK;
1.75 claudio 191: else if (strcmp(optarg, "mpls") == 0)
192: af = AF_MPLS;
1.76 gollo 193: else if (strcmp(optarg, "pflow") == 0)
194: af = PF_PFLOW;
1.63 claudio 195: else if (strcmp(optarg, "mask") == 0)
196: af = 0xff;
1.1 deraadt 197: else {
198: (void)fprintf(stderr,
199: "%s: %s: unknown address family\n",
1.2 deraadt 200: __progname, optarg);
1.1 deraadt 201: exit(1);
202: }
203: break;
204: case 'g':
205: gflag = 1;
206: break;
1.2 deraadt 207: case 'I':
1.1 deraadt 208: iflag = 1;
1.2 deraadt 209: interface = optarg;
1.1 deraadt 210: break;
211: case 'i':
212: iflag = 1;
213: break;
1.19 itojun 214: case 'l':
215: lflag = 1;
216: break;
1.1 deraadt 217: case 'M':
218: memf = optarg;
219: break;
220: case 'm':
221: mflag = 1;
222: break;
223: case 'N':
224: nlistf = optarg;
225: break;
226: case 'n':
227: nflag = 1;
228: break;
229: case 'p':
230: if ((tp = name2protox(optarg)) == NULL) {
231: (void)fprintf(stderr,
1.42 jmc 232: "%s: %s: unknown protocol\n",
1.2 deraadt 233: __progname, optarg);
1.1 deraadt 234: exit(1);
235: }
236: pflag = 1;
1.27 brian 237: break;
1.59 markus 238: case 'P':
239: errno = 0;
240: pcbaddr = strtoul(optarg, &ep, 16);
241: if (optarg[0] == '\0' || *ep != '\0' ||
242: errno == ERANGE) {
243: (void)fprintf(stderr,
244: "%s: %s: invalid PCB address\n",
245: __progname, optarg);
246: exit(1);
247: }
248: Pflag = 1;
249: break;
1.27 brian 250: case 'q':
251: qflag = 1;
1.1 deraadt 252: break;
253: case 'r':
254: rflag = 1;
1.46 cedric 255: break;
1.1 deraadt 256: case 's':
257: ++sflag;
258: break;
1.68 claudio 259: case 'T':
260: tableid = strtonum(optarg, 0, RT_TABLEID_MAX, &errstr);
261: if (errstr)
262: errx(1, "invalid table id: %s", errstr);
263: break;
1.1 deraadt 264: case 't':
265: tflag = 1;
266: break;
267: case 'u':
268: af = AF_UNIX;
1.13 peter 269: break;
270: case 'v':
271: vflag = 1;
1.1 deraadt 272: break;
1.56 reyk 273: case 'W':
274: Wflag = 1;
275: interface = optarg;
276: break;
1.1 deraadt 277: case 'w':
278: interval = atoi(optarg);
279: iflag = 1;
280: break;
281: case '?':
282: default:
283: usage();
284: }
285: argv += optind;
286: argc -= optind;
287:
1.33 deraadt 288: /*
1.56 reyk 289: * Show per-interface statistics which don't need access to
290: * kernel memory (they're using IOCTLs)
291: */
292: if (Wflag) {
293: if (interface == NULL)
294: usage();
295: net80211_ifstats(interface);
296: exit(0);
297: }
298:
299: /*
1.33 deraadt 300: * Discard setgid privileges if not the running kernel so that bad
301: * guys can't print interesting stuff from kernel memory.
1.59 markus 302: * Dumping PCB info is also restricted.
1.33 deraadt 303: */
1.61 djm 304: gid = getgid();
305: if (nlistf != NULL || memf != NULL || Pflag)
306: if (setresgid(gid, gid, gid) == -1)
307: err(1, "setresgid");
1.73 claudio 308:
1.33 deraadt 309: if ((kvmd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY,
310: buf)) == NULL) {
311: fprintf(stderr, "%s: kvm_open: %s\n", __progname, buf);
312: exit(1);
313: }
1.61 djm 314:
315: if (nlistf == NULL && memf == NULL && !Pflag)
316: if (setresgid(gid, gid, gid) == -1)
317: err(1, "setresgid");
1.33 deraadt 318:
1.1 deraadt 319: #define BACKWARD_COMPATIBILITY
320: #ifdef BACKWARD_COMPATIBILITY
321: if (*argv) {
322: if (isdigit(**argv)) {
323: interval = atoi(*argv);
324: if (interval <= 0)
325: usage();
326: ++argv;
327: iflag = 1;
328: }
329: if (*argv) {
330: nlistf = *argv;
331: if (*++argv)
332: memf = *argv;
333: }
334: }
335: #endif
1.14 deraadt 336:
1.1 deraadt 337: if (kvm_nlist(kvmd, nl) < 0 || nl[0].n_type == 0) {
338: if (nlistf)
1.2 deraadt 339: fprintf(stderr, "%s: %s: no namelist\n", __progname,
340: nlistf);
1.1 deraadt 341: else
1.2 deraadt 342: fprintf(stderr, "%s: no namelist\n", __progname);
1.1 deraadt 343: exit(1);
344: }
345: if (mflag) {
1.70 deraadt 346: mbpr();
1.1 deraadt 347: exit(0);
348: }
349: if (pflag) {
1.45 markus 350: printproto(tp, tp->pr_name);
1.59 markus 351: exit(0);
352: }
353: if (Pflag) {
354: if (tp == NULL && (tp = name2protox("tcp")) == NULL) {
355: (void)fprintf(stderr,
356: "%s: %s: unknown protocol\n",
357: __progname, "tcp");
358: exit(1);
359: }
360: if (tp->pr_dump)
361: (tp->pr_dump)(pcbaddr);
1.1 deraadt 362: exit(0);
363: }
364: /*
365: * Keep file descriptors open to avoid overhead
366: * of open/close on each call to get* routines.
367: */
368: sethostent(1);
369: setnetent(1);
1.71 deraadt 370:
1.1 deraadt 371: if (iflag) {
1.74 claudio 372: intpr(interval);
1.1 deraadt 373: exit(0);
374: }
375: if (rflag) {
376: if (sflag)
1.73 claudio 377: rt_stats();
378: else if (Aflag || nlistf != NULL || memf != NULL)
1.63 claudio 379: routepr(nl[N_RTREE].n_value, nl[N_RTMASK].n_value,
380: nl[N_AF2RTAFIDX].n_value, nl[N_RTBLIDMAX].n_value);
1.73 claudio 381: else
382: p_rttables(af, tableid);
1.1 deraadt 383: exit(0);
384: }
385: if (gflag) {
1.19 itojun 386: if (sflag) {
387: if (af == AF_INET || af == AF_UNSPEC)
1.71 deraadt 388: mrt_stats();
1.19 itojun 389: if (af == AF_INET6 || af == AF_UNSPEC)
1.71 deraadt 390: mrt6_stats();
1.70 deraadt 391: } else {
1.19 itojun 392: if (af == AF_INET || af == AF_UNSPEC)
1.71 deraadt 393: mroutepr(nl[N_MFCHASHTBL].n_value,
1.19 itojun 394: nl[N_MFCHASH].n_value,
395: nl[N_VIFTABLE].n_value);
396: if (af == AF_INET6 || af == AF_UNSPEC)
1.71 deraadt 397: mroute6pr(nl[N_MF6CTABLE].n_value,
1.19 itojun 398: nl[N_MIF6TABLE].n_value);
399: }
1.1 deraadt 400: exit(0);
401: }
402: if (af == AF_INET || af == AF_UNSPEC) {
403: setprotoent(1);
404: setservent(1);
405: /* ugh, this is O(MN) ... why do we do this? */
1.11 millert 406: while ((p = getprotoent())) {
1.1 deraadt 407: for (tp = protox; tp->pr_name; tp++)
408: if (strcmp(tp->pr_name, p->p_name) == 0)
409: break;
1.71 deraadt 410: if (tp->pr_name == 0)
1.1 deraadt 411: continue;
412: printproto(tp, p->p_name);
413: }
414: endprotoent();
1.76 gollo 415: }
416: if (af == PF_PFLOW || af == AF_UNSPEC) {
417: tp = name2protox("pflow");
418: printproto(tp, tp->pr_name);
1.1 deraadt 419: }
1.19 itojun 420: if (af == AF_INET6 || af == AF_UNSPEC)
421: for (tp = ip6protox; tp->pr_name; tp++)
422: printproto(tp, tp->pr_name);
1.1 deraadt 423: if ((af == AF_UNIX || af == AF_UNSPEC) && !sflag)
424: unixpr(nl[N_UNIXSW].n_value);
1.12 denny 425: if (af == AF_APPLETALK || af == AF_UNSPEC)
426: for (tp = atalkprotox; tp->pr_name; tp++)
427: printproto(tp, tp->pr_name);
1.1 deraadt 428: exit(0);
429: }
430:
431: /*
432: * Print out protocol statistics or control blocks (per sflag).
433: * If the interface was not specifically requested, and the symbol
434: * is not in the namelist, ignore this one.
435: */
436: static void
1.34 deraadt 437: printproto(struct protox *tp, char *name)
1.1 deraadt 438: {
439: if (sflag) {
1.71 deraadt 440: if (tp->pr_stats != NULL)
441: (*tp->pr_stats)(name);
1.1 deraadt 442: } else {
1.71 deraadt 443: u_char i = tp->pr_index;
444: if (tp->pr_cblocks != NULL &&
445: i < sizeof(nl) / sizeof(nl[0]) &&
446: (nl[i].n_value || af != AF_UNSPEC))
447: (*tp->pr_cblocks)(nl[i].n_value, name);
1.1 deraadt 448: }
449: }
450:
451: /*
452: * Read kernel memory, return 0 on success.
453: */
454: int
1.53 jaredy 455: kread(u_long addr, void *buf, int size)
1.1 deraadt 456: {
457:
458: if (kvm_read(kvmd, addr, buf, size) != size) {
1.2 deraadt 459: (void)fprintf(stderr, "%s: %s\n", __progname,
1.1 deraadt 460: kvm_geterr(kvmd));
461: return (-1);
462: }
463: return (0);
464: }
465:
466: char *
1.77 ! claudio 467: plural(u_int64_t n)
1.1 deraadt 468: {
469: return (n != 1 ? "s" : "");
470: }
471:
472: char *
1.77 ! claudio 473: plurales(u_int64_t n)
1.1 deraadt 474: {
475: return (n != 1 ? "es" : "");
476: }
477:
478: /*
479: * Find the protox for the given "well-known" name.
480: */
481: static struct protox *
1.34 deraadt 482: knownname(char *name)
1.1 deraadt 483: {
484: struct protox **tpp, *tp;
485:
486: for (tpp = protoprotox; *tpp; tpp++)
487: for (tp = *tpp; tp->pr_name; tp++)
488: if (strcmp(tp->pr_name, name) == 0)
489: return (tp);
490: return (NULL);
491: }
492:
493: /*
494: * Find the protox corresponding to name.
495: */
496: static struct protox *
1.34 deraadt 497: name2protox(char *name)
1.1 deraadt 498: {
499: struct protox *tp;
500: char **alias; /* alias from p->aliases */
501: struct protoent *p;
502:
503: /*
504: * Try to find the name in the list of "well-known" names. If that
505: * fails, check if name is an alias for an Internet protocol.
506: */
1.11 millert 507: if ((tp = knownname(name)))
1.1 deraadt 508: return (tp);
509:
510: setprotoent(1); /* make protocol lookup cheaper */
1.11 millert 511: while ((p = getprotoent())) {
1.1 deraadt 512: /* assert: name not same as p->name */
513: for (alias = p->p_aliases; *alias; alias++)
514: if (strcmp(name, *alias) == 0) {
515: endprotoent();
516: return (knownname(p->p_name));
517: }
518: }
519: endprotoent();
520: return (NULL);
521: }
522:
523: static void
1.34 deraadt 524: usage(void)
1.1 deraadt 525: {
526: (void)fprintf(stderr,
1.60 jaredy 527: "usage: %s [-Aan] [-f address_family] [-M core] [-N system]\n"
1.69 sobrado 528: " %s [-bdFgilmnqrstu] [-f address_family] [-M core] [-N system]\n"
529: " [-T tableid]\n"
1.60 jaredy 530: " %s [-bdn] [-I interface] [-M core] [-N system] [-w wait]\n"
531: " %s [-M core] [-N system] -P pcbaddr\n"
532: " %s [-s] [-M core] [-N system] [-p protocol]\n"
533: " %s [-a] [-f address_family] [-i | -I interface]\n"
534: " %s [-W interface]\n",
535: __progname, __progname, __progname, __progname,
536: __progname, __progname, __progname);
1.1 deraadt 537: exit(1);
538: }
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