Annotation of src/usr.bin/netstat/main.c, Revision 1.92
1.92 ! mikeb 1: /* $OpenBSD: main.c,v 1.91 2011/11/01 10:14:06 mikeb 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:
1.87 bluhm 96: { "" }
1.1 deraadt 97: };
98:
99: struct protox {
1.87 bluhm 100: u_char pr_index; /* index into nlist of cb head */
1.90 mikeb 101: void (*pr_cblocks)(u_long, char *, int, u_int, u_long);
1.87 bluhm 102: /* control blocks printing routine */
103: void (*pr_stats)(char *); /* statistics printing routine */
104: char *pr_name; /* well-known name */
1.1 deraadt 105: } protox[] = {
1.87 bluhm 106: { N_TCBTABLE, protopr, tcp_stats, "tcp" },
107: { N_UDBTABLE, protopr, udp_stats, "udp" },
108: { N_RAWIPTABLE, protopr, ip_stats, "ip" },
109: { N_DIVBTABLE, protopr, div_stats, "divert" },
110: { -1, NULL, icmp_stats, "icmp" },
111: { -1, NULL, igmp_stats, "igmp" },
112: { -1, NULL, ah_stats, "ah" },
113: { -1, NULL, esp_stats, "esp" },
114: { -1, NULL, ipip_stats, "ipencap" },
115: { -1, NULL, etherip_stats, "etherip" },
116: { -1, NULL, ipcomp_stats, "ipcomp" },
117: { -1, NULL, carp_stats, "carp" },
118: { -1, NULL, pfsync_stats, "pfsync" },
119: { -1, NULL, pim_stats, "pim" },
120: { -1, NULL, pflow_stats, "pflow" },
121: { -1, NULL, NULL, NULL }
1.1 deraadt 122: };
123:
1.19 itojun 124: struct protox ip6protox[] = {
1.87 bluhm 125: { N_TCBTABLE, protopr, NULL, "tcp" },
126: { N_UDBTABLE, protopr, NULL, "udp" },
127: { N_RAWIP6TABLE,protopr, ip6_stats, "ip6" },
128: { N_DIVB6TABLE, protopr, div6_stats, "divert6" },
129: { -1, NULL, icmp6_stats, "icmp6" },
130: { -1, NULL, pim6_stats, "pim6" },
131: { -1, NULL, rip6_stats, "rip6" },
132: { -1, NULL, NULL, NULL }
1.19 itojun 133: };
134:
1.34 deraadt 135: struct protox *protoprotox[] = {
1.89 henning 136: protox, ip6protox, NULL
1.34 deraadt 137: };
1.1 deraadt 138:
1.90 mikeb 139: static void printproto(struct protox *, char *, int, u_int, u_long);
1.30 millert 140: static void usage(void);
141: static struct protox *name2protox(char *);
142: static struct protox *knownname(char *);
1.86 claudio 143: u_int gettable(const char *);
144:
1.1 deraadt 145:
146: kvm_t *kvmd;
147:
148: int
1.34 deraadt 149: main(int argc, char *argv[])
1.1 deraadt 150: {
151: extern char *optarg;
152: extern int optind;
1.68 claudio 153: const char *errstr;
1.28 mpech 154: struct protoent *p;
155: struct protox *tp = NULL; /* for printing cblocks & stats */
1.1 deraadt 156: int ch;
1.59 markus 157: char *nlistf = NULL, *memf = NULL, *ep;
1.1 deraadt 158: char buf[_POSIX2_LINE_MAX];
1.61 djm 159: gid_t gid;
1.59 markus 160: u_long pcbaddr = 0;
1.91 mikeb 161: u_int tableid;
1.86 claudio 162: int Tflag = 0;
1.82 tedu 163: int repeatcount = 0;
1.1 deraadt 164:
165: af = AF_UNSPEC;
1.91 mikeb 166: tableid = getrtable();
1.1 deraadt 167:
1.88 jsing 168: while ((ch = getopt(argc, argv,
169: "AaBbc:dFf:gI:ilM:mN:np:P:qrsT:tuvW:w:")) != -1)
1.31 deraadt 170: switch (ch) {
1.1 deraadt 171: case 'A':
172: Aflag = 1;
173: break;
174: case 'a':
175: aflag = 1;
1.24 camield 176: break;
1.88 jsing 177: case 'B':
178: Bflag = 1;
179: break;
1.24 camield 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;
1.75 claudio 203: else if (strcmp(optarg, "mpls") == 0)
204: af = AF_MPLS;
1.76 gollo 205: else if (strcmp(optarg, "pflow") == 0)
206: af = PF_PFLOW;
1.63 claudio 207: else if (strcmp(optarg, "mask") == 0)
208: af = 0xff;
1.1 deraadt 209: else {
210: (void)fprintf(stderr,
211: "%s: %s: unknown address family\n",
1.2 deraadt 212: __progname, optarg);
1.1 deraadt 213: exit(1);
214: }
215: break;
216: case 'g':
217: gflag = 1;
218: break;
1.2 deraadt 219: case 'I':
1.1 deraadt 220: iflag = 1;
1.2 deraadt 221: interface = optarg;
1.1 deraadt 222: break;
223: case 'i':
224: iflag = 1;
225: break;
1.19 itojun 226: case 'l':
227: lflag = 1;
228: break;
1.1 deraadt 229: case 'M':
230: memf = optarg;
231: break;
232: case 'm':
233: mflag = 1;
234: break;
235: case 'N':
236: nlistf = optarg;
237: break;
238: case 'n':
239: nflag = 1;
240: break;
241: case 'p':
242: if ((tp = name2protox(optarg)) == NULL) {
243: (void)fprintf(stderr,
1.42 jmc 244: "%s: %s: unknown protocol\n",
1.2 deraadt 245: __progname, optarg);
1.1 deraadt 246: exit(1);
247: }
248: pflag = 1;
1.27 brian 249: break;
1.59 markus 250: case 'P':
251: errno = 0;
252: pcbaddr = strtoul(optarg, &ep, 16);
253: if (optarg[0] == '\0' || *ep != '\0' ||
254: errno == ERANGE) {
255: (void)fprintf(stderr,
256: "%s: %s: invalid PCB address\n",
257: __progname, optarg);
258: exit(1);
259: }
260: Pflag = 1;
261: break;
1.27 brian 262: case 'q':
263: qflag = 1;
1.1 deraadt 264: break;
265: case 'r':
266: rflag = 1;
1.46 cedric 267: break;
1.1 deraadt 268: case 's':
269: ++sflag;
270: break;
1.68 claudio 271: case 'T':
1.86 claudio 272: Tflag = 1;
273: tableid = gettable(optarg);
1.68 claudio 274: break;
1.1 deraadt 275: case 't':
276: tflag = 1;
277: break;
278: case 'u':
279: af = AF_UNIX;
1.13 peter 280: break;
281: case 'v':
282: vflag = 1;
1.1 deraadt 283: break;
1.56 reyk 284: case 'W':
285: Wflag = 1;
286: interface = optarg;
287: break;
1.1 deraadt 288: case 'w':
289: interval = atoi(optarg);
290: iflag = 1;
291: break;
292: case '?':
293: default:
294: usage();
295: }
296: argv += optind;
297: argc -= optind;
298:
1.33 deraadt 299: /*
1.56 reyk 300: * Show per-interface statistics which don't need access to
301: * kernel memory (they're using IOCTLs)
302: */
303: if (Wflag) {
304: if (interface == NULL)
305: usage();
306: net80211_ifstats(interface);
307: exit(0);
308: }
309:
1.84 lum 310: #define BACKWARD_COMPATIBILITY
311: #ifdef BACKWARD_COMPATIBILITY
312: if (*argv) {
313: if (isdigit(**argv)) {
314: interval = atoi(*argv);
315: if (interval <= 0)
316: usage();
317: ++argv;
318: iflag = 1;
319: }
320: if (*argv) {
321: nlistf = *argv;
322: if (*++argv)
323: memf = *argv;
324: }
325: }
326: #endif
327:
1.56 reyk 328: /*
1.33 deraadt 329: * Discard setgid privileges if not the running kernel so that bad
330: * guys can't print interesting stuff from kernel memory.
1.59 markus 331: * Dumping PCB info is also restricted.
1.33 deraadt 332: */
1.61 djm 333: gid = getgid();
334: if (nlistf != NULL || memf != NULL || Pflag)
335: if (setresgid(gid, gid, gid) == -1)
336: err(1, "setresgid");
1.73 claudio 337:
1.33 deraadt 338: if ((kvmd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY,
339: buf)) == NULL) {
1.78 deraadt 340: fprintf(stderr, "%s: kvm_openfiles: %s\n", __progname, buf);
1.33 deraadt 341: exit(1);
342: }
1.61 djm 343:
344: if (nlistf == NULL && memf == NULL && !Pflag)
345: if (setresgid(gid, gid, gid) == -1)
346: err(1, "setresgid");
1.14 deraadt 347:
1.1 deraadt 348: if (kvm_nlist(kvmd, nl) < 0 || nl[0].n_type == 0) {
349: if (nlistf)
1.2 deraadt 350: fprintf(stderr, "%s: %s: no namelist\n", __progname,
351: nlistf);
1.1 deraadt 352: else
1.2 deraadt 353: fprintf(stderr, "%s: no namelist\n", __progname);
1.1 deraadt 354: exit(1);
355: }
356: if (mflag) {
1.70 deraadt 357: mbpr();
1.1 deraadt 358: exit(0);
359: }
360: if (pflag) {
1.90 mikeb 361: printproto(tp, tp->pr_name, af, tableid, 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) {
1.82 tedu 372: intpr(interval, repeatcount);
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,
1.79 claudio 380: nl[N_AF2RTAFIDX].n_value, nl[N_RTBLIDMAX].n_value,
381: tableid);
1.73 claudio 382: else
1.92 ! mikeb 383: p_rttables(af, tableid);
1.1 deraadt 384: exit(0);
385: }
386: if (gflag) {
1.19 itojun 387: if (sflag) {
388: if (af == AF_INET || af == AF_UNSPEC)
1.71 deraadt 389: mrt_stats();
1.19 itojun 390: if (af == AF_INET6 || af == AF_UNSPEC)
1.71 deraadt 391: mrt6_stats();
1.70 deraadt 392: } else {
1.19 itojun 393: if (af == AF_INET || af == AF_UNSPEC)
1.71 deraadt 394: mroutepr(nl[N_MFCHASHTBL].n_value,
1.19 itojun 395: nl[N_MFCHASH].n_value,
396: nl[N_VIFTABLE].n_value);
397: if (af == AF_INET6 || af == AF_UNSPEC)
1.71 deraadt 398: mroute6pr(nl[N_MF6CTABLE].n_value,
1.19 itojun 399: nl[N_MIF6TABLE].n_value);
400: }
1.1 deraadt 401: exit(0);
402: }
403: if (af == AF_INET || af == AF_UNSPEC) {
404: setprotoent(1);
405: setservent(1);
406: /* ugh, this is O(MN) ... why do we do this? */
1.11 millert 407: while ((p = getprotoent())) {
1.1 deraadt 408: for (tp = protox; tp->pr_name; tp++)
409: if (strcmp(tp->pr_name, p->p_name) == 0)
410: break;
1.71 deraadt 411: if (tp->pr_name == 0)
1.1 deraadt 412: continue;
1.90 mikeb 413: printproto(tp, p->p_name, AF_INET, tableid, pcbaddr);
1.1 deraadt 414: }
415: endprotoent();
1.76 gollo 416: }
417: if (af == PF_PFLOW || af == AF_UNSPEC) {
418: tp = name2protox("pflow");
1.90 mikeb 419: printproto(tp, tp->pr_name, af, tableid, pcbaddr);
1.1 deraadt 420: }
1.19 itojun 421: if (af == AF_INET6 || af == AF_UNSPEC)
422: for (tp = ip6protox; tp->pr_name; tp++)
1.90 mikeb 423: printproto(tp, tp->pr_name, AF_INET6, tableid,
424: pcbaddr);
1.1 deraadt 425: if ((af == AF_UNIX || af == AF_UNSPEC) && !sflag)
1.87 bluhm 426: unixpr(nl[N_UNIXSW].n_value, pcbaddr);
1.1 deraadt 427: exit(0);
428: }
429:
430: /*
431: * Print out protocol statistics or control blocks (per sflag).
432: * If the interface was not specifically requested, and the symbol
433: * is not in the namelist, ignore this one.
434: */
435: static void
1.90 mikeb 436: printproto(struct protox *tp, char *name, int af, u_int tableid,
437: u_long pcbaddr)
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))
1.90 mikeb 447: (*tp->pr_cblocks)(nl[i].n_value, name, af, tableid,
448: pcbaddr);
1.1 deraadt 449: }
450: }
451:
452: /*
453: * Read kernel memory, return 0 on success.
454: */
455: int
1.53 jaredy 456: kread(u_long addr, void *buf, int size)
1.1 deraadt 457: {
458:
459: if (kvm_read(kvmd, addr, buf, size) != size) {
1.2 deraadt 460: (void)fprintf(stderr, "%s: %s\n", __progname,
1.1 deraadt 461: kvm_geterr(kvmd));
462: return (-1);
463: }
464: return (0);
465: }
466:
467: char *
1.77 claudio 468: plural(u_int64_t n)
1.1 deraadt 469: {
470: return (n != 1 ? "s" : "");
471: }
472:
473: char *
1.77 claudio 474: plurales(u_int64_t n)
1.1 deraadt 475: {
476: return (n != 1 ? "es" : "");
477: }
478:
479: /*
480: * Find the protox for the given "well-known" name.
481: */
482: static struct protox *
1.34 deraadt 483: knownname(char *name)
1.1 deraadt 484: {
485: struct protox **tpp, *tp;
486:
487: for (tpp = protoprotox; *tpp; tpp++)
488: for (tp = *tpp; tp->pr_name; tp++)
489: if (strcmp(tp->pr_name, name) == 0)
490: return (tp);
491: return (NULL);
492: }
493:
494: /*
495: * Find the protox corresponding to name.
496: */
497: static struct protox *
1.34 deraadt 498: name2protox(char *name)
1.1 deraadt 499: {
500: struct protox *tp;
501: char **alias; /* alias from p->aliases */
502: struct protoent *p;
503:
504: /*
505: * Try to find the name in the list of "well-known" names. If that
506: * fails, check if name is an alias for an Internet protocol.
507: */
1.11 millert 508: if ((tp = knownname(name)))
1.1 deraadt 509: return (tp);
510:
511: setprotoent(1); /* make protocol lookup cheaper */
1.11 millert 512: while ((p = getprotoent())) {
1.1 deraadt 513: /* assert: name not same as p->name */
514: for (alias = p->p_aliases; *alias; alias++)
515: if (strcmp(name, *alias) == 0) {
516: endprotoent();
517: return (knownname(p->p_name));
518: }
519: }
520: endprotoent();
521: return (NULL);
522: }
523:
524: static void
1.34 deraadt 525: usage(void)
1.1 deraadt 526: {
527: (void)fprintf(stderr,
1.88 jsing 528: "usage: %s [-AaBn] [-f address_family] [-M core] [-N system]\n"
1.69 sobrado 529: " %s [-bdFgilmnqrstu] [-f address_family] [-M core] [-N system]\n"
530: " [-T tableid]\n"
1.82 tedu 531: " %s [-bdn] [-c count] [-I interface] [-M core] [-N system] [-w wait]\n"
1.87 bluhm 532: " %s [-v] [-M core] [-N system] -P pcbaddr\n"
1.60 jaredy 533: " %s [-s] [-M core] [-N system] [-p protocol]\n"
534: " %s [-a] [-f address_family] [-i | -I interface]\n"
535: " %s [-W interface]\n",
536: __progname, __progname, __progname, __progname,
537: __progname, __progname, __progname);
1.1 deraadt 538: exit(1);
539: }
1.86 claudio 540:
541: u_int
542: gettable(const char *s)
543: {
544: const char *errstr;
545: struct rt_tableinfo info;
546: int mib[6];
547: size_t len;
548: u_int tableid;
549:
550: tableid = strtonum(s, 0, RT_TABLEID_MAX, &errstr);
551: if (errstr)
552: errx(1, "invalid table id: %s", errstr);
553:
554: mib[0] = CTL_NET;
555: mib[1] = AF_ROUTE;
556: mib[2] = 0;
557: mib[3] = 0;
558: mib[4] = NET_RT_TABLE;
559: mib[5] = tableid;
560:
561: len = sizeof(info);
562: if (sysctl(mib, 6, &info, &len, NULL, 0) == -1)
563: err(1, "routing table %i", tableid);
564:
565: return (tableid);
566: }