Annotation of src/usr.bin/netstat/main.c, Revision 1.86
1.86 ! claudio 1: /* $OpenBSD: main.c,v 1.85 2010/07/14 23:44:41 dhill 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>
1.86 ! claudio 37: #include <sys/sysctl.h>
1.1 deraadt 38:
1.68 claudio 39: #include <net/route.h>
1.1 deraadt 40: #include <netinet/in.h>
41:
42: #include <ctype.h>
1.61 djm 43: #include <err.h>
1.1 deraadt 44: #include <errno.h>
45: #include <kvm.h>
46: #include <limits.h>
47: #include <netdb.h>
48: #include <nlist.h>
49: #include <paths.h>
50: #include <stdio.h>
51: #include <stdlib.h>
52: #include <string.h>
53: #include <unistd.h>
54: #include "netstat.h"
55:
56: struct nlist nl[] = {
1.71 deraadt 57: #define N_TCBTABLE 0
1.1 deraadt 58: { "_tcbtable" },
1.71 deraadt 59: #define N_UDBTABLE 1
1.1 deraadt 60: { "_udbtable" },
1.71 deraadt 61: #define N_DDPCB 2
62: { "_ddpcb"},
1.74 claudio 63: #define N_UNIXSW 3
1.1 deraadt 64: { "_unixsw" },
1.71 deraadt 65:
1.74 claudio 66: #define N_MFCHASHTBL 4
1.1 deraadt 67: { "_mfchashtbl" },
1.74 claudio 68: #define N_MFCHASH 5
1.1 deraadt 69: { "_mfchash" },
1.74 claudio 70: #define N_VIFTABLE 6
1.1 deraadt 71: { "_viftable" },
1.71 deraadt 72:
1.74 claudio 73: #define N_MF6CTABLE 7
1.19 itojun 74: { "_mf6ctable" },
1.74 claudio 75: #define N_MIF6TABLE 8
1.19 itojun 76: { "_mif6table" },
1.71 deraadt 77:
1.74 claudio 78: #define N_RTREE 9
1.71 deraadt 79: { "_rt_tables"},
1.74 claudio 80: #define N_RTMASK 10
1.71 deraadt 81: { "_mask_rnhead" },
1.74 claudio 82: #define N_AF2RTAFIDX 11
1.71 deraadt 83: { "_af2rtafidx" },
1.74 claudio 84: #define N_RTBLIDMAX 12
1.71 deraadt 85: { "_rtbl_id_max" },
86:
1.74 claudio 87: #define N_RAWIPTABLE 13
1.40 markus 88: { "_rawcbtable" },
1.74 claudio 89: #define N_RAWIP6TABLE 14
1.40 markus 90: { "_rawin6pcbtable" },
1.80 michele 91: #define N_DIVBTABLE 15
92: { "_divbtable" },
1.81 michele 93: #define N_DIVB6TABLE 16
94: { "_divb6table" },
1.71 deraadt 95:
1.55 deraadt 96: { ""}
1.1 deraadt 97: };
98:
99: struct protox {
1.38 deraadt 100: u_char pr_index; /* index into nlist of cb head */
1.83 blambert 101: void (*pr_cblocks)(u_long, char *, int); /* control blocks printing routine */
1.71 deraadt 102: void (*pr_stats)(char *); /* statistics printing routine */
1.59 markus 103: void (*pr_dump)(u_long); /* pcb printing routine */
1.38 deraadt 104: char *pr_name; /* well-known name */
1.1 deraadt 105: } protox[] = {
1.71 deraadt 106: { N_TCBTABLE, protopr, tcp_stats, tcp_dump, "tcp" },
107: { N_UDBTABLE, protopr, udp_stats, NULL, "udp" },
108: { N_RAWIPTABLE, protopr, ip_stats, NULL, "ip" },
1.80 michele 109: { N_DIVBTABLE, protopr, div_stats, NULL, "divert" },
1.71 deraadt 110: { -1, NULL, icmp_stats, NULL, "icmp" },
111: { -1, NULL, igmp_stats, NULL, "igmp" },
112: { -1, NULL, ah_stats, NULL, "ah" },
113: { -1, NULL, esp_stats, NULL, "esp" },
114: { -1, NULL, ipip_stats, NULL, "ipencap" },
115: { -1, NULL, etherip_stats, NULL, "etherip" },
116: { -1, NULL, ipcomp_stats, NULL, "ipcomp" },
117: { -1, NULL, carp_stats, NULL, "carp" },
118: { -1, NULL, pfsync_stats, NULL, "pfsync" },
119: { -1, NULL, pim_stats, NULL, "pim" },
1.76 gollo 120: { -1, NULL, pflow_stats, NULL, "pflow" },
1.71 deraadt 121: { -1, NULL, NULL, NULL, NULL }
1.1 deraadt 122: };
123:
1.19 itojun 124: struct protox ip6protox[] = {
1.83 blambert 125: { N_TCBTABLE, protopr, NULL, tcp_dump, "tcp" },
126: { N_UDBTABLE, protopr, NULL, NULL, "udp" },
127: { N_RAWIP6TABLE,protopr, ip6_stats, NULL, "ip6" },
128: { N_DIVB6TABLE, protopr, div6_stats, NULL, "divert6" },
1.71 deraadt 129: { -1, NULL, icmp6_stats, NULL, "icmp6" },
130: { -1, NULL, pim6_stats, NULL, "pim6" },
131: { -1, NULL, rip6_stats, NULL, "rip6" },
132: { -1, NULL, NULL, NULL, NULL }
1.19 itojun 133: };
134:
1.12 denny 135: struct protox atalkprotox[] = {
1.71 deraadt 136: { N_DDPCB, atalkprotopr, ddp_stats, NULL, "ddp" },
137: { -1, NULL, NULL, NULL, NULL }
1.12 denny 138: };
139:
1.34 deraadt 140: struct protox *protoprotox[] = {
1.66 henning 141: protox, ip6protox, atalkprotox, NULL
1.34 deraadt 142: };
1.1 deraadt 143:
1.83 blambert 144: static void printproto(struct protox *, char *, int);
1.30 millert 145: static void usage(void);
146: static struct protox *name2protox(char *);
147: static struct protox *knownname(char *);
1.86 ! claudio 148: u_int gettable(const char *);
! 149:
1.1 deraadt 150:
151: kvm_t *kvmd;
152:
153: int
1.34 deraadt 154: main(int argc, char *argv[])
1.1 deraadt 155: {
156: extern char *optarg;
157: extern int optind;
1.68 claudio 158: const char *errstr;
1.28 mpech 159: struct protoent *p;
160: struct protox *tp = NULL; /* for printing cblocks & stats */
1.1 deraadt 161: int ch;
1.59 markus 162: char *nlistf = NULL, *memf = NULL, *ep;
1.1 deraadt 163: char buf[_POSIX2_LINE_MAX];
1.61 djm 164: gid_t gid;
1.59 markus 165: u_long pcbaddr = 0;
1.68 claudio 166: u_int tableid = 0;
1.86 ! claudio 167: int Tflag = 0;
1.82 tedu 168: int repeatcount = 0;
1.1 deraadt 169:
170: af = AF_UNSPEC;
171:
1.82 tedu 172: while ((ch = getopt(argc, argv, "Aabc:dFf:gI:ilM:mN:np:P:qrsT:tuvW:w:")) != -1)
1.31 deraadt 173: switch (ch) {
1.1 deraadt 174: case 'A':
175: Aflag = 1;
176: break;
177: case 'a':
178: aflag = 1;
1.24 camield 179: break;
180: case 'b':
181: bflag = 1;
1.1 deraadt 182: break;
1.82 tedu 183: case 'c':
184: repeatcount = strtonum(optarg, 1, INT_MAX, &errstr);
185: break;
1.1 deraadt 186: case 'd':
187: dflag = 1;
1.64 pyr 188: break;
189: case 'F':
190: Fflag = 1;
1.1 deraadt 191: break;
192: case 'f':
1.4 mickey 193: if (strcmp(optarg, "inet") == 0)
1.1 deraadt 194: af = AF_INET;
1.19 itojun 195: else if (strcmp(optarg, "inet6") == 0)
196: af = AF_INET6;
1.7 kstailey 197: else if (strcmp(optarg, "local") == 0)
198: af = AF_LOCAL;
1.1 deraadt 199: else if (strcmp(optarg, "unix") == 0)
200: af = AF_UNIX;
1.10 angelos 201: else if (strcmp(optarg, "encap") == 0)
1.16 angelos 202: af = PF_KEY;
1.12 denny 203: else if (strcmp(optarg, "atalk") == 0)
204: af = AF_APPLETALK;
1.75 claudio 205: else if (strcmp(optarg, "mpls") == 0)
206: af = AF_MPLS;
1.76 gollo 207: else if (strcmp(optarg, "pflow") == 0)
208: af = PF_PFLOW;
1.63 claudio 209: else if (strcmp(optarg, "mask") == 0)
210: af = 0xff;
1.1 deraadt 211: else {
212: (void)fprintf(stderr,
213: "%s: %s: unknown address family\n",
1.2 deraadt 214: __progname, optarg);
1.1 deraadt 215: exit(1);
216: }
217: break;
218: case 'g':
219: gflag = 1;
220: break;
1.2 deraadt 221: case 'I':
1.1 deraadt 222: iflag = 1;
1.2 deraadt 223: interface = optarg;
1.1 deraadt 224: break;
225: case 'i':
226: iflag = 1;
227: break;
1.19 itojun 228: case 'l':
229: lflag = 1;
230: break;
1.1 deraadt 231: case 'M':
232: memf = optarg;
233: break;
234: case 'm':
235: mflag = 1;
236: break;
237: case 'N':
238: nlistf = optarg;
239: break;
240: case 'n':
241: nflag = 1;
242: break;
243: case 'p':
244: if ((tp = name2protox(optarg)) == NULL) {
245: (void)fprintf(stderr,
1.42 jmc 246: "%s: %s: unknown protocol\n",
1.2 deraadt 247: __progname, optarg);
1.1 deraadt 248: exit(1);
249: }
250: pflag = 1;
1.27 brian 251: break;
1.59 markus 252: case 'P':
253: errno = 0;
254: pcbaddr = strtoul(optarg, &ep, 16);
255: if (optarg[0] == '\0' || *ep != '\0' ||
256: errno == ERANGE) {
257: (void)fprintf(stderr,
258: "%s: %s: invalid PCB address\n",
259: __progname, optarg);
260: exit(1);
261: }
262: Pflag = 1;
263: break;
1.27 brian 264: case 'q':
265: qflag = 1;
1.1 deraadt 266: break;
267: case 'r':
268: rflag = 1;
1.46 cedric 269: break;
1.1 deraadt 270: case 's':
271: ++sflag;
272: break;
1.68 claudio 273: case 'T':
1.86 ! claudio 274: Tflag = 1;
! 275: tableid = gettable(optarg);
1.68 claudio 276: break;
1.1 deraadt 277: case 't':
278: tflag = 1;
279: break;
280: case 'u':
281: af = AF_UNIX;
1.13 peter 282: break;
283: case 'v':
284: vflag = 1;
1.1 deraadt 285: break;
1.56 reyk 286: case 'W':
287: Wflag = 1;
288: interface = optarg;
289: break;
1.1 deraadt 290: case 'w':
291: interval = atoi(optarg);
292: iflag = 1;
293: break;
294: case '?':
295: default:
296: usage();
297: }
298: argv += optind;
299: argc -= optind;
300:
1.33 deraadt 301: /*
1.56 reyk 302: * Show per-interface statistics which don't need access to
303: * kernel memory (they're using IOCTLs)
304: */
305: if (Wflag) {
306: if (interface == NULL)
307: usage();
308: net80211_ifstats(interface);
309: exit(0);
310: }
311:
1.84 lum 312: #define BACKWARD_COMPATIBILITY
313: #ifdef BACKWARD_COMPATIBILITY
314: if (*argv) {
315: if (isdigit(**argv)) {
316: interval = atoi(*argv);
317: if (interval <= 0)
318: usage();
319: ++argv;
320: iflag = 1;
321: }
322: if (*argv) {
323: nlistf = *argv;
324: if (*++argv)
325: memf = *argv;
326: }
327: }
328: #endif
329:
1.56 reyk 330: /*
1.33 deraadt 331: * Discard setgid privileges if not the running kernel so that bad
332: * guys can't print interesting stuff from kernel memory.
1.59 markus 333: * Dumping PCB info is also restricted.
1.33 deraadt 334: */
1.61 djm 335: gid = getgid();
336: if (nlistf != NULL || memf != NULL || Pflag)
337: if (setresgid(gid, gid, gid) == -1)
338: err(1, "setresgid");
1.73 claudio 339:
1.33 deraadt 340: if ((kvmd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY,
341: buf)) == NULL) {
1.78 deraadt 342: fprintf(stderr, "%s: kvm_openfiles: %s\n", __progname, buf);
1.33 deraadt 343: exit(1);
344: }
1.61 djm 345:
346: if (nlistf == NULL && memf == NULL && !Pflag)
347: if (setresgid(gid, gid, gid) == -1)
348: err(1, "setresgid");
1.14 deraadt 349:
1.1 deraadt 350: if (kvm_nlist(kvmd, nl) < 0 || nl[0].n_type == 0) {
351: if (nlistf)
1.2 deraadt 352: fprintf(stderr, "%s: %s: no namelist\n", __progname,
353: nlistf);
1.1 deraadt 354: else
1.2 deraadt 355: fprintf(stderr, "%s: no namelist\n", __progname);
1.1 deraadt 356: exit(1);
357: }
358: if (mflag) {
1.70 deraadt 359: mbpr();
1.1 deraadt 360: exit(0);
361: }
362: if (pflag) {
1.83 blambert 363: printproto(tp, tp->pr_name, af);
1.59 markus 364: exit(0);
365: }
366: if (Pflag) {
367: if (tp == NULL && (tp = name2protox("tcp")) == NULL) {
368: (void)fprintf(stderr,
369: "%s: %s: unknown protocol\n",
370: __progname, "tcp");
371: exit(1);
372: }
373: if (tp->pr_dump)
374: (tp->pr_dump)(pcbaddr);
1.1 deraadt 375: exit(0);
376: }
377: /*
378: * Keep file descriptors open to avoid overhead
379: * of open/close on each call to get* routines.
380: */
381: sethostent(1);
382: setnetent(1);
1.71 deraadt 383:
1.1 deraadt 384: if (iflag) {
1.82 tedu 385: intpr(interval, repeatcount);
1.1 deraadt 386: exit(0);
387: }
388: if (rflag) {
389: if (sflag)
1.73 claudio 390: rt_stats();
391: else if (Aflag || nlistf != NULL || memf != NULL)
1.63 claudio 392: routepr(nl[N_RTREE].n_value, nl[N_RTMASK].n_value,
1.79 claudio 393: nl[N_AF2RTAFIDX].n_value, nl[N_RTBLIDMAX].n_value,
394: tableid);
1.73 claudio 395: else
1.86 ! claudio 396: p_rttables(af, tableid, Tflag);
1.1 deraadt 397: exit(0);
398: }
399: if (gflag) {
1.19 itojun 400: if (sflag) {
401: if (af == AF_INET || af == AF_UNSPEC)
1.71 deraadt 402: mrt_stats();
1.19 itojun 403: if (af == AF_INET6 || af == AF_UNSPEC)
1.71 deraadt 404: mrt6_stats();
1.70 deraadt 405: } else {
1.19 itojun 406: if (af == AF_INET || af == AF_UNSPEC)
1.71 deraadt 407: mroutepr(nl[N_MFCHASHTBL].n_value,
1.19 itojun 408: nl[N_MFCHASH].n_value,
409: nl[N_VIFTABLE].n_value);
410: if (af == AF_INET6 || af == AF_UNSPEC)
1.71 deraadt 411: mroute6pr(nl[N_MF6CTABLE].n_value,
1.19 itojun 412: nl[N_MIF6TABLE].n_value);
413: }
1.1 deraadt 414: exit(0);
415: }
416: if (af == AF_INET || af == AF_UNSPEC) {
417: setprotoent(1);
418: setservent(1);
419: /* ugh, this is O(MN) ... why do we do this? */
1.11 millert 420: while ((p = getprotoent())) {
1.1 deraadt 421: for (tp = protox; tp->pr_name; tp++)
422: if (strcmp(tp->pr_name, p->p_name) == 0)
423: break;
1.71 deraadt 424: if (tp->pr_name == 0)
1.1 deraadt 425: continue;
1.85 dhill 426: printproto(tp, p->p_name, AF_INET);
1.1 deraadt 427: }
428: endprotoent();
1.76 gollo 429: }
430: if (af == PF_PFLOW || af == AF_UNSPEC) {
431: tp = name2protox("pflow");
1.83 blambert 432: printproto(tp, tp->pr_name, af);
1.1 deraadt 433: }
1.19 itojun 434: if (af == AF_INET6 || af == AF_UNSPEC)
435: for (tp = ip6protox; tp->pr_name; tp++)
1.85 dhill 436: printproto(tp, tp->pr_name, AF_INET6);
1.1 deraadt 437: if ((af == AF_UNIX || af == AF_UNSPEC) && !sflag)
438: unixpr(nl[N_UNIXSW].n_value);
1.12 denny 439: if (af == AF_APPLETALK || af == AF_UNSPEC)
440: for (tp = atalkprotox; tp->pr_name; tp++)
1.83 blambert 441: printproto(tp, tp->pr_name, af);
1.1 deraadt 442: exit(0);
443: }
444:
445: /*
446: * Print out protocol statistics or control blocks (per sflag).
447: * If the interface was not specifically requested, and the symbol
448: * is not in the namelist, ignore this one.
449: */
450: static void
1.83 blambert 451: printproto(struct protox *tp, char *name, int af)
1.1 deraadt 452: {
453: if (sflag) {
1.71 deraadt 454: if (tp->pr_stats != NULL)
455: (*tp->pr_stats)(name);
1.1 deraadt 456: } else {
1.71 deraadt 457: u_char i = tp->pr_index;
458: if (tp->pr_cblocks != NULL &&
459: i < sizeof(nl) / sizeof(nl[0]) &&
460: (nl[i].n_value || af != AF_UNSPEC))
1.83 blambert 461: (*tp->pr_cblocks)(nl[i].n_value, name, af);
1.1 deraadt 462: }
463: }
464:
465: /*
466: * Read kernel memory, return 0 on success.
467: */
468: int
1.53 jaredy 469: kread(u_long addr, void *buf, int size)
1.1 deraadt 470: {
471:
472: if (kvm_read(kvmd, addr, buf, size) != size) {
1.2 deraadt 473: (void)fprintf(stderr, "%s: %s\n", __progname,
1.1 deraadt 474: kvm_geterr(kvmd));
475: return (-1);
476: }
477: return (0);
478: }
479:
480: char *
1.77 claudio 481: plural(u_int64_t n)
1.1 deraadt 482: {
483: return (n != 1 ? "s" : "");
484: }
485:
486: char *
1.77 claudio 487: plurales(u_int64_t n)
1.1 deraadt 488: {
489: return (n != 1 ? "es" : "");
490: }
491:
492: /*
493: * Find the protox for the given "well-known" name.
494: */
495: static struct protox *
1.34 deraadt 496: knownname(char *name)
1.1 deraadt 497: {
498: struct protox **tpp, *tp;
499:
500: for (tpp = protoprotox; *tpp; tpp++)
501: for (tp = *tpp; tp->pr_name; tp++)
502: if (strcmp(tp->pr_name, name) == 0)
503: return (tp);
504: return (NULL);
505: }
506:
507: /*
508: * Find the protox corresponding to name.
509: */
510: static struct protox *
1.34 deraadt 511: name2protox(char *name)
1.1 deraadt 512: {
513: struct protox *tp;
514: char **alias; /* alias from p->aliases */
515: struct protoent *p;
516:
517: /*
518: * Try to find the name in the list of "well-known" names. If that
519: * fails, check if name is an alias for an Internet protocol.
520: */
1.11 millert 521: if ((tp = knownname(name)))
1.1 deraadt 522: return (tp);
523:
524: setprotoent(1); /* make protocol lookup cheaper */
1.11 millert 525: while ((p = getprotoent())) {
1.1 deraadt 526: /* assert: name not same as p->name */
527: for (alias = p->p_aliases; *alias; alias++)
528: if (strcmp(name, *alias) == 0) {
529: endprotoent();
530: return (knownname(p->p_name));
531: }
532: }
533: endprotoent();
534: return (NULL);
535: }
536:
537: static void
1.34 deraadt 538: usage(void)
1.1 deraadt 539: {
540: (void)fprintf(stderr,
1.60 jaredy 541: "usage: %s [-Aan] [-f address_family] [-M core] [-N system]\n"
1.69 sobrado 542: " %s [-bdFgilmnqrstu] [-f address_family] [-M core] [-N system]\n"
543: " [-T tableid]\n"
1.82 tedu 544: " %s [-bdn] [-c count] [-I interface] [-M core] [-N system] [-w wait]\n"
1.60 jaredy 545: " %s [-M core] [-N system] -P pcbaddr\n"
546: " %s [-s] [-M core] [-N system] [-p protocol]\n"
547: " %s [-a] [-f address_family] [-i | -I interface]\n"
548: " %s [-W interface]\n",
549: __progname, __progname, __progname, __progname,
550: __progname, __progname, __progname);
1.1 deraadt 551: exit(1);
552: }
1.86 ! claudio 553:
! 554: u_int
! 555: gettable(const char *s)
! 556: {
! 557: const char *errstr;
! 558: struct rt_tableinfo info;
! 559: int mib[6];
! 560: size_t len;
! 561: u_int tableid;
! 562:
! 563: tableid = strtonum(s, 0, RT_TABLEID_MAX, &errstr);
! 564: if (errstr)
! 565: errx(1, "invalid table id: %s", errstr);
! 566:
! 567: mib[0] = CTL_NET;
! 568: mib[1] = AF_ROUTE;
! 569: mib[2] = 0;
! 570: mib[3] = 0;
! 571: mib[4] = NET_RT_TABLE;
! 572: mib[5] = tableid;
! 573:
! 574: len = sizeof(info);
! 575: if (sysctl(mib, 6, &info, &len, NULL, 0) == -1)
! 576: err(1, "routing table %i", tableid);
! 577:
! 578: return (tableid);
! 579: }
! 580:
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