Annotation of src/usr.bin/netstat/main.c, Revision 1.89
1.89 ! henning 1: /* $OpenBSD: main.c,v 1.88 2011/03/15 13:10:31 jsing 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 */
101: void (*pr_cblocks)(u_long, char *, int, u_long);
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:
1.87 bluhm 139: static void printproto(struct protox *, char *, 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;
1.68 claudio 161: u_int tableid = 0;
1.86 claudio 162: int Tflag = 0;
1.82 tedu 163: int repeatcount = 0;
1.1 deraadt 164:
165: af = AF_UNSPEC;
166:
1.88 jsing 167: while ((ch = getopt(argc, argv,
168: "AaBbc:dFf:gI:ilM:mN:np:P:qrsT:tuvW:w:")) != -1)
1.31 deraadt 169: switch (ch) {
1.1 deraadt 170: case 'A':
171: Aflag = 1;
172: break;
173: case 'a':
174: aflag = 1;
1.24 camield 175: break;
1.88 jsing 176: case 'B':
177: Bflag = 1;
178: break;
1.24 camield 179: case 'b':
180: bflag = 1;
1.1 deraadt 181: break;
1.82 tedu 182: case 'c':
183: repeatcount = strtonum(optarg, 1, INT_MAX, &errstr);
184: break;
1.1 deraadt 185: case 'd':
186: dflag = 1;
1.64 pyr 187: break;
188: case 'F':
189: Fflag = 1;
1.1 deraadt 190: break;
191: case 'f':
1.4 mickey 192: if (strcmp(optarg, "inet") == 0)
1.1 deraadt 193: af = AF_INET;
1.19 itojun 194: else if (strcmp(optarg, "inet6") == 0)
195: af = AF_INET6;
1.7 kstailey 196: else if (strcmp(optarg, "local") == 0)
197: af = AF_LOCAL;
1.1 deraadt 198: else if (strcmp(optarg, "unix") == 0)
199: af = AF_UNIX;
1.10 angelos 200: else if (strcmp(optarg, "encap") == 0)
1.16 angelos 201: af = PF_KEY;
1.75 claudio 202: else if (strcmp(optarg, "mpls") == 0)
203: af = AF_MPLS;
1.76 gollo 204: else if (strcmp(optarg, "pflow") == 0)
205: af = PF_PFLOW;
1.63 claudio 206: else if (strcmp(optarg, "mask") == 0)
207: af = 0xff;
1.1 deraadt 208: else {
209: (void)fprintf(stderr,
210: "%s: %s: unknown address family\n",
1.2 deraadt 211: __progname, optarg);
1.1 deraadt 212: exit(1);
213: }
214: break;
215: case 'g':
216: gflag = 1;
217: break;
1.2 deraadt 218: case 'I':
1.1 deraadt 219: iflag = 1;
1.2 deraadt 220: interface = optarg;
1.1 deraadt 221: break;
222: case 'i':
223: iflag = 1;
224: break;
1.19 itojun 225: case 'l':
226: lflag = 1;
227: break;
1.1 deraadt 228: case 'M':
229: memf = optarg;
230: break;
231: case 'm':
232: mflag = 1;
233: break;
234: case 'N':
235: nlistf = optarg;
236: break;
237: case 'n':
238: nflag = 1;
239: break;
240: case 'p':
241: if ((tp = name2protox(optarg)) == NULL) {
242: (void)fprintf(stderr,
1.42 jmc 243: "%s: %s: unknown protocol\n",
1.2 deraadt 244: __progname, optarg);
1.1 deraadt 245: exit(1);
246: }
247: pflag = 1;
1.27 brian 248: break;
1.59 markus 249: case 'P':
250: errno = 0;
251: pcbaddr = strtoul(optarg, &ep, 16);
252: if (optarg[0] == '\0' || *ep != '\0' ||
253: errno == ERANGE) {
254: (void)fprintf(stderr,
255: "%s: %s: invalid PCB address\n",
256: __progname, optarg);
257: exit(1);
258: }
259: Pflag = 1;
260: break;
1.27 brian 261: case 'q':
262: qflag = 1;
1.1 deraadt 263: break;
264: case 'r':
265: rflag = 1;
1.46 cedric 266: break;
1.1 deraadt 267: case 's':
268: ++sflag;
269: break;
1.68 claudio 270: case 'T':
1.86 claudio 271: Tflag = 1;
272: tableid = gettable(optarg);
1.68 claudio 273: break;
1.1 deraadt 274: case 't':
275: tflag = 1;
276: break;
277: case 'u':
278: af = AF_UNIX;
1.13 peter 279: break;
280: case 'v':
281: vflag = 1;
1.1 deraadt 282: break;
1.56 reyk 283: case 'W':
284: Wflag = 1;
285: interface = optarg;
286: break;
1.1 deraadt 287: case 'w':
288: interval = atoi(optarg);
289: iflag = 1;
290: break;
291: case '?':
292: default:
293: usage();
294: }
295: argv += optind;
296: argc -= optind;
297:
1.33 deraadt 298: /*
1.56 reyk 299: * Show per-interface statistics which don't need access to
300: * kernel memory (they're using IOCTLs)
301: */
302: if (Wflag) {
303: if (interface == NULL)
304: usage();
305: net80211_ifstats(interface);
306: exit(0);
307: }
308:
1.84 lum 309: #define BACKWARD_COMPATIBILITY
310: #ifdef BACKWARD_COMPATIBILITY
311: if (*argv) {
312: if (isdigit(**argv)) {
313: interval = atoi(*argv);
314: if (interval <= 0)
315: usage();
316: ++argv;
317: iflag = 1;
318: }
319: if (*argv) {
320: nlistf = *argv;
321: if (*++argv)
322: memf = *argv;
323: }
324: }
325: #endif
326:
1.56 reyk 327: /*
1.33 deraadt 328: * Discard setgid privileges if not the running kernel so that bad
329: * guys can't print interesting stuff from kernel memory.
1.59 markus 330: * Dumping PCB info is also restricted.
1.33 deraadt 331: */
1.61 djm 332: gid = getgid();
333: if (nlistf != NULL || memf != NULL || Pflag)
334: if (setresgid(gid, gid, gid) == -1)
335: err(1, "setresgid");
1.73 claudio 336:
1.33 deraadt 337: if ((kvmd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY,
338: buf)) == NULL) {
1.78 deraadt 339: fprintf(stderr, "%s: kvm_openfiles: %s\n", __progname, buf);
1.33 deraadt 340: exit(1);
341: }
1.61 djm 342:
343: if (nlistf == NULL && memf == NULL && !Pflag)
344: if (setresgid(gid, gid, gid) == -1)
345: err(1, "setresgid");
1.14 deraadt 346:
1.1 deraadt 347: if (kvm_nlist(kvmd, nl) < 0 || nl[0].n_type == 0) {
348: if (nlistf)
1.2 deraadt 349: fprintf(stderr, "%s: %s: no namelist\n", __progname,
350: nlistf);
1.1 deraadt 351: else
1.2 deraadt 352: fprintf(stderr, "%s: no namelist\n", __progname);
1.1 deraadt 353: exit(1);
354: }
355: if (mflag) {
1.70 deraadt 356: mbpr();
1.1 deraadt 357: exit(0);
358: }
359: if (pflag) {
1.87 bluhm 360: printproto(tp, tp->pr_name, af, pcbaddr);
1.1 deraadt 361: exit(0);
362: }
363: /*
364: * Keep file descriptors open to avoid overhead
365: * of open/close on each call to get* routines.
366: */
367: sethostent(1);
368: setnetent(1);
1.71 deraadt 369:
1.1 deraadt 370: if (iflag) {
1.82 tedu 371: intpr(interval, repeatcount);
1.1 deraadt 372: exit(0);
373: }
374: if (rflag) {
375: if (sflag)
1.73 claudio 376: rt_stats();
377: else if (Aflag || nlistf != NULL || memf != NULL)
1.63 claudio 378: routepr(nl[N_RTREE].n_value, nl[N_RTMASK].n_value,
1.79 claudio 379: nl[N_AF2RTAFIDX].n_value, nl[N_RTBLIDMAX].n_value,
380: tableid);
1.73 claudio 381: else
1.86 claudio 382: p_rttables(af, tableid, Tflag);
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;
1.87 bluhm 412: printproto(tp, p->p_name, AF_INET, pcbaddr);
1.1 deraadt 413: }
414: endprotoent();
1.76 gollo 415: }
416: if (af == PF_PFLOW || af == AF_UNSPEC) {
417: tp = name2protox("pflow");
1.87 bluhm 418: printproto(tp, tp->pr_name, af, pcbaddr);
1.1 deraadt 419: }
1.19 itojun 420: if (af == AF_INET6 || af == AF_UNSPEC)
421: for (tp = ip6protox; tp->pr_name; tp++)
1.87 bluhm 422: printproto(tp, tp->pr_name, AF_INET6, pcbaddr);
1.1 deraadt 423: if ((af == AF_UNIX || af == AF_UNSPEC) && !sflag)
1.87 bluhm 424: unixpr(nl[N_UNIXSW].n_value, pcbaddr);
1.1 deraadt 425: exit(0);
426: }
427:
428: /*
429: * Print out protocol statistics or control blocks (per sflag).
430: * If the interface was not specifically requested, and the symbol
431: * is not in the namelist, ignore this one.
432: */
433: static void
1.87 bluhm 434: printproto(struct protox *tp, char *name, int af, u_long pcbaddr)
1.1 deraadt 435: {
436: if (sflag) {
1.71 deraadt 437: if (tp->pr_stats != NULL)
438: (*tp->pr_stats)(name);
1.1 deraadt 439: } else {
1.71 deraadt 440: u_char i = tp->pr_index;
441: if (tp->pr_cblocks != NULL &&
442: i < sizeof(nl) / sizeof(nl[0]) &&
443: (nl[i].n_value || af != AF_UNSPEC))
1.87 bluhm 444: (*tp->pr_cblocks)(nl[i].n_value, name, af, pcbaddr);
1.1 deraadt 445: }
446: }
447:
448: /*
449: * Read kernel memory, return 0 on success.
450: */
451: int
1.53 jaredy 452: kread(u_long addr, void *buf, int size)
1.1 deraadt 453: {
454:
455: if (kvm_read(kvmd, addr, buf, size) != size) {
1.2 deraadt 456: (void)fprintf(stderr, "%s: %s\n", __progname,
1.1 deraadt 457: kvm_geterr(kvmd));
458: return (-1);
459: }
460: return (0);
461: }
462:
463: char *
1.77 claudio 464: plural(u_int64_t n)
1.1 deraadt 465: {
466: return (n != 1 ? "s" : "");
467: }
468:
469: char *
1.77 claudio 470: plurales(u_int64_t n)
1.1 deraadt 471: {
472: return (n != 1 ? "es" : "");
473: }
474:
475: /*
476: * Find the protox for the given "well-known" name.
477: */
478: static struct protox *
1.34 deraadt 479: knownname(char *name)
1.1 deraadt 480: {
481: struct protox **tpp, *tp;
482:
483: for (tpp = protoprotox; *tpp; tpp++)
484: for (tp = *tpp; tp->pr_name; tp++)
485: if (strcmp(tp->pr_name, name) == 0)
486: return (tp);
487: return (NULL);
488: }
489:
490: /*
491: * Find the protox corresponding to name.
492: */
493: static struct protox *
1.34 deraadt 494: name2protox(char *name)
1.1 deraadt 495: {
496: struct protox *tp;
497: char **alias; /* alias from p->aliases */
498: struct protoent *p;
499:
500: /*
501: * Try to find the name in the list of "well-known" names. If that
502: * fails, check if name is an alias for an Internet protocol.
503: */
1.11 millert 504: if ((tp = knownname(name)))
1.1 deraadt 505: return (tp);
506:
507: setprotoent(1); /* make protocol lookup cheaper */
1.11 millert 508: while ((p = getprotoent())) {
1.1 deraadt 509: /* assert: name not same as p->name */
510: for (alias = p->p_aliases; *alias; alias++)
511: if (strcmp(name, *alias) == 0) {
512: endprotoent();
513: return (knownname(p->p_name));
514: }
515: }
516: endprotoent();
517: return (NULL);
518: }
519:
520: static void
1.34 deraadt 521: usage(void)
1.1 deraadt 522: {
523: (void)fprintf(stderr,
1.88 jsing 524: "usage: %s [-AaBn] [-f address_family] [-M core] [-N system]\n"
1.69 sobrado 525: " %s [-bdFgilmnqrstu] [-f address_family] [-M core] [-N system]\n"
526: " [-T tableid]\n"
1.82 tedu 527: " %s [-bdn] [-c count] [-I interface] [-M core] [-N system] [-w wait]\n"
1.87 bluhm 528: " %s [-v] [-M core] [-N system] -P pcbaddr\n"
1.60 jaredy 529: " %s [-s] [-M core] [-N system] [-p protocol]\n"
530: " %s [-a] [-f address_family] [-i | -I interface]\n"
531: " %s [-W interface]\n",
532: __progname, __progname, __progname, __progname,
533: __progname, __progname, __progname);
1.1 deraadt 534: exit(1);
535: }
1.86 claudio 536:
537: u_int
538: gettable(const char *s)
539: {
540: const char *errstr;
541: struct rt_tableinfo info;
542: int mib[6];
543: size_t len;
544: u_int tableid;
545:
546: tableid = strtonum(s, 0, RT_TABLEID_MAX, &errstr);
547: if (errstr)
548: errx(1, "invalid table id: %s", errstr);
549:
550: mib[0] = CTL_NET;
551: mib[1] = AF_ROUTE;
552: mib[2] = 0;
553: mib[3] = 0;
554: mib[4] = NET_RT_TABLE;
555: mib[5] = tableid;
556:
557: len = sizeof(info);
558: if (sysctl(mib, 6, &info, &len, NULL, 0) == -1)
559: err(1, "routing table %i", tableid);
560:
561: return (tableid);
562: }
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