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1.1 deraadt 1: /* $NetBSD: main.c,v 1.8 1995/10/03 21:42:40 thorpej Exp $ */
2:
3: /*
4: * Copyright (c) 1983, 1988, 1993
5: * Regents of the University of California. All rights reserved.
6: *
7: * Redistribution and use in source and binary forms, with or without
8: * modification, are permitted provided that the following conditions
9: * are met:
10: * 1. Redistributions of source code must retain the above copyright
11: * notice, this list of conditions and the following disclaimer.
12: * 2. Redistributions in binary form must reproduce the above copyright
13: * notice, this list of conditions and the following disclaimer in the
14: * documentation and/or other materials provided with the distribution.
15: * 3. All advertising materials mentioning features or use of this software
16: * must display the following acknowledgement:
17: * This product includes software developed by the University of
18: * California, Berkeley and its contributors.
19: * 4. Neither the name of the University nor the names of its contributors
20: * may be used to endorse or promote products derived from this software
21: * without specific prior written permission.
22: *
23: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33: * SUCH DAMAGE.
34: */
35:
36: #ifndef lint
37: char copyright[] =
38: "@(#) Copyright (c) 1983, 1988, 1993\n\
39: Regents of the University of California. All rights reserved.\n";
40: #endif /* not lint */
41:
42: #ifndef lint
43: #if 0
44: static char sccsid[] = "from: @(#)main.c 8.4 (Berkeley) 3/1/94";
45: #else
46: static char *rcsid = "$NetBSD: main.c,v 1.8 1995/10/03 21:42:40 thorpej Exp $";
47: #endif
48: #endif /* not lint */
49:
50: #include <sys/param.h>
51: #include <sys/file.h>
52: #include <sys/protosw.h>
53: #include <sys/socket.h>
54:
55: #include <netinet/in.h>
56:
57: #include <ctype.h>
58: #include <errno.h>
59: #include <kvm.h>
60: #include <limits.h>
61: #include <netdb.h>
62: #include <nlist.h>
63: #include <paths.h>
64: #include <stdio.h>
65: #include <stdlib.h>
66: #include <string.h>
67: #include <unistd.h>
68: #include "netstat.h"
69:
70: struct nlist nl[] = {
71: #define N_MBSTAT 0
72: { "_mbstat" },
73: #define N_IPSTAT 1
74: { "_ipstat" },
75: #define N_TCBTABLE 2
76: { "_tcbtable" },
77: #define N_TCPSTAT 3
78: { "_tcpstat" },
79: #define N_UDBTABLE 4
80: { "_udbtable" },
81: #define N_UDPSTAT 5
82: { "_udpstat" },
83: #define N_IFNET 6
84: { "_ifnet" },
85: #define N_IMP 7
86: { "_imp_softc" },
87: #define N_ICMPSTAT 8
88: { "_icmpstat" },
89: #define N_RTSTAT 9
90: { "_rtstat" },
91: #define N_UNIXSW 10
92: { "_unixsw" },
93: #define N_IDP 11
94: { "_nspcb"},
95: #define N_IDPSTAT 12
96: { "_idpstat"},
97: #define N_SPPSTAT 13
98: { "_spp_istat"},
99: #define N_NSERR 14
100: { "_ns_errstat"},
101: #define N_CLNPSTAT 15
102: { "_clnp_stat"},
103: #define IN_NOTUSED 16
104: { "_tp_inpcb" },
105: #define ISO_TP 17
106: { "_tp_refinfo" },
107: #define N_TPSTAT 18
108: { "_tp_stat" },
109: #define N_ESISSTAT 19
110: { "_esis_stat"},
111: #define N_NIMP 20
112: { "_nimp"},
113: #define N_RTREE 21
114: { "_rt_tables"},
115: #define N_CLTP 22
116: { "_cltb"},
117: #define N_CLTPSTAT 23
118: { "_cltpstat"},
119: #define N_NFILE 24
120: { "_nfile" },
121: #define N_FILE 25
122: { "_file" },
123: #define N_IGMPSTAT 26
124: { "_igmpstat" },
125: #define N_MRTPROTO 27
126: { "_ip_mrtproto" },
127: #define N_MRTSTAT 28
128: { "_mrtstat" },
129: #define N_MFCHASHTBL 29
130: { "_mfchashtbl" },
131: #define N_MFCHASH 30
132: { "_mfchash" },
133: #define N_VIFTABLE 31
134: { "_viftable" },
135: "",
136: };
137:
138: struct protox {
139: u_char pr_index; /* index into nlist of cb head */
140: u_char pr_sindex; /* index into nlist of stat block */
141: u_char pr_wanted; /* 1 if wanted, 0 otherwise */
142: void (*pr_cblocks)(); /* control blocks printing routine */
143: void (*pr_stats)(); /* statistics printing routine */
144: char *pr_name; /* well-known name */
145: } protox[] = {
146: { N_TCBTABLE, N_TCPSTAT, 1, protopr,
147: tcp_stats, "tcp" },
148: { N_UDBTABLE, N_UDPSTAT, 1, protopr,
149: udp_stats, "udp" },
150: { -1, N_IPSTAT, 1, 0,
151: ip_stats, "ip" },
152: { -1, N_ICMPSTAT, 1, 0,
153: icmp_stats, "icmp" },
154: { -1, N_IGMPSTAT, 1, 0,
155: igmp_stats, "igmp" },
156: { -1, -1, 0, 0,
157: 0, 0 }
158: };
159:
160: struct protox nsprotox[] = {
161: { N_IDP, N_IDPSTAT, 1, nsprotopr,
162: idp_stats, "idp" },
163: { N_IDP, N_SPPSTAT, 1, nsprotopr,
164: spp_stats, "spp" },
165: { -1, N_NSERR, 1, 0,
166: nserr_stats, "ns_err" },
167: { -1, -1, 0, 0,
168: 0, 0 }
169: };
170:
171: struct protox isoprotox[] = {
172: { ISO_TP, N_TPSTAT, 1, iso_protopr,
173: tp_stats, "tp" },
174: { N_CLTP, N_CLTPSTAT, 1, iso_protopr,
175: cltp_stats, "cltp" },
176: { -1, N_CLNPSTAT, 1, 0,
177: clnp_stats, "clnp"},
178: { -1, N_ESISSTAT, 1, 0,
179: esis_stats, "esis"},
180: { -1, -1, 0, 0,
181: 0, 0 }
182: };
183:
184: struct protox *protoprotox[] = { protox, nsprotox, isoprotox, NULL };
185:
186: static void printproto __P((struct protox *, char *));
187: static void usage __P((void));
188: static struct protox *name2protox __P((char *));
189: static struct protox *knownname __P((char *));
190:
191: kvm_t *kvmd;
192:
193: int
194: main(argc, argv)
195: int argc;
196: char *argv[];
197: {
198: extern char *optarg;
199: extern int optind;
200: register struct protoent *p;
201: register struct protox *tp; /* for printing cblocks & stats */
202: register char *cp;
203: int ch;
204: char *nlistf = NULL, *memf = NULL;
205: char buf[_POSIX2_LINE_MAX];
206:
207: if (cp = rindex(argv[0], '/'))
208: prog = cp + 1;
209: else
210: prog = argv[0];
211: af = AF_UNSPEC;
212:
213: while ((ch = getopt(argc, argv, "Aadf:ghI:iM:mN:np:rstuw:")) != EOF)
214: switch(ch) {
215: case 'A':
216: Aflag = 1;
217: break;
218: case 'a':
219: aflag = 1;
220: break;
221: case 'd':
222: dflag = 1;
223: break;
224: case 'f':
225: if (strcmp(optarg, "ns") == 0)
226: af = AF_NS;
227: else if (strcmp(optarg, "inet") == 0)
228: af = AF_INET;
229: else if (strcmp(optarg, "unix") == 0)
230: af = AF_UNIX;
231: else if (strcmp(optarg, "iso") == 0)
232: af = AF_ISO;
233: else {
234: (void)fprintf(stderr,
235: "%s: %s: unknown address family\n",
236: prog, optarg);
237: exit(1);
238: }
239: break;
240: case 'g':
241: gflag = 1;
242: break;
243: case 'I': {
244: char *cp;
245:
246: iflag = 1;
247: for (cp = interface = optarg; isalpha(*cp); cp++)
248: continue;
249: unit = atoi(cp);
250: *cp = '\0';
251: break;
252: }
253: case 'i':
254: iflag = 1;
255: break;
256: case 'M':
257: memf = optarg;
258: break;
259: case 'm':
260: mflag = 1;
261: break;
262: case 'N':
263: nlistf = optarg;
264: break;
265: case 'n':
266: nflag = 1;
267: break;
268: case 'p':
269: if ((tp = name2protox(optarg)) == NULL) {
270: (void)fprintf(stderr,
271: "%s: %s: unknown or uninstrumented protocol\n",
272: prog, optarg);
273: exit(1);
274: }
275: pflag = 1;
276: break;
277: case 'r':
278: rflag = 1;
279: break;
280: case 's':
281: ++sflag;
282: break;
283: case 't':
284: tflag = 1;
285: break;
286: case 'u':
287: af = AF_UNIX;
288: break;
289: case 'w':
290: interval = atoi(optarg);
291: iflag = 1;
292: break;
293: case '?':
294: default:
295: usage();
296: }
297: argv += optind;
298: argc -= optind;
299:
300: #define BACKWARD_COMPATIBILITY
301: #ifdef BACKWARD_COMPATIBILITY
302: if (*argv) {
303: if (isdigit(**argv)) {
304: interval = atoi(*argv);
305: if (interval <= 0)
306: usage();
307: ++argv;
308: iflag = 1;
309: }
310: if (*argv) {
311: nlistf = *argv;
312: if (*++argv)
313: memf = *argv;
314: }
315: }
316: #endif
317:
318: /*
319: * Discard setgid privileges if not the running kernel so that bad
320: * guys can't print interesting stuff from kernel memory.
321: */
322: if (nlistf != NULL || memf != NULL)
323: setgid(getgid());
324:
325: if ((kvmd = kvm_open(nlistf, memf, NULL, O_RDONLY, prog)) == NULL) {
326: fprintf(stderr, "%s: kvm_open: %s\n", prog, buf);
327: exit(1);
328: }
329: if (kvm_nlist(kvmd, nl) < 0 || nl[0].n_type == 0) {
330: if (nlistf)
331: fprintf(stderr, "%s: %s: no namelist\n", prog, nlistf);
332: else
333: fprintf(stderr, "%s: no namelist\n", prog);
334: exit(1);
335: }
336: if (mflag) {
337: mbpr(nl[N_MBSTAT].n_value);
338: exit(0);
339: }
340: if (pflag) {
341: if (tp->pr_stats)
342: (*tp->pr_stats)(nl[tp->pr_sindex].n_value,
343: tp->pr_name);
344: else
345: printf("%s: no stats routine\n", tp->pr_name);
346: exit(0);
347: }
348: /*
349: * Keep file descriptors open to avoid overhead
350: * of open/close on each call to get* routines.
351: */
352: sethostent(1);
353: setnetent(1);
354: if (iflag) {
355: intpr(interval, nl[N_IFNET].n_value);
356: exit(0);
357: }
358: if (rflag) {
359: if (sflag)
360: rt_stats(nl[N_RTSTAT].n_value);
361: else
362: routepr(nl[N_RTREE].n_value);
363: exit(0);
364: }
365: if (gflag) {
366: if (sflag)
367: mrt_stats(nl[N_MRTPROTO].n_value,
368: nl[N_MRTSTAT].n_value);
369: else
370: mroutepr(nl[N_MRTPROTO].n_value,
371: nl[N_MFCHASHTBL].n_value,
372: nl[N_MFCHASH].n_value,
373: nl[N_VIFTABLE].n_value);
374: exit(0);
375: }
376: if (af == AF_INET || af == AF_UNSPEC) {
377: setprotoent(1);
378: setservent(1);
379: /* ugh, this is O(MN) ... why do we do this? */
380: while (p = getprotoent()) {
381: for (tp = protox; tp->pr_name; tp++)
382: if (strcmp(tp->pr_name, p->p_name) == 0)
383: break;
384: if (tp->pr_name == 0 || tp->pr_wanted == 0)
385: continue;
386: printproto(tp, p->p_name);
387: }
388: endprotoent();
389: }
390: if (af == AF_NS || af == AF_UNSPEC)
391: for (tp = nsprotox; tp->pr_name; tp++)
392: printproto(tp, tp->pr_name);
393: if (af == AF_ISO || af == AF_UNSPEC)
394: for (tp = isoprotox; tp->pr_name; tp++)
395: printproto(tp, tp->pr_name);
396: if ((af == AF_UNIX || af == AF_UNSPEC) && !sflag)
397: unixpr(nl[N_UNIXSW].n_value);
398: exit(0);
399: }
400:
401: /*
402: * Print out protocol statistics or control blocks (per sflag).
403: * If the interface was not specifically requested, and the symbol
404: * is not in the namelist, ignore this one.
405: */
406: static void
407: printproto(tp, name)
408: register struct protox *tp;
409: char *name;
410: {
411: void (*pr)();
412: u_long off;
413:
414: if (sflag) {
415: pr = tp->pr_stats;
416: off = nl[tp->pr_sindex].n_value;
417: } else {
418: pr = tp->pr_cblocks;
419: off = nl[tp->pr_index].n_value;
420: }
421: if (pr != NULL && (off || af != AF_UNSPEC))
422: (*pr)(off, name);
423: }
424:
425: /*
426: * Read kernel memory, return 0 on success.
427: */
428: int
429: kread(addr, buf, size)
430: u_long addr;
431: char *buf;
432: int size;
433: {
434:
435: if (kvm_read(kvmd, addr, buf, size) != size) {
436: /* XXX this duplicates kvm_read's error printout */
437: (void)fprintf(stderr, "%s: kvm_read %s\n", prog,
438: kvm_geterr(kvmd));
439: return (-1);
440: }
441: return (0);
442: }
443:
444: char *
445: plural(n)
446: int n;
447: {
448: return (n != 1 ? "s" : "");
449: }
450:
451: char *
452: plurales(n)
453: int n;
454: {
455: return (n != 1 ? "es" : "");
456: }
457:
458: /*
459: * Find the protox for the given "well-known" name.
460: */
461: static struct protox *
462: knownname(name)
463: char *name;
464: {
465: struct protox **tpp, *tp;
466:
467: for (tpp = protoprotox; *tpp; tpp++)
468: for (tp = *tpp; tp->pr_name; tp++)
469: if (strcmp(tp->pr_name, name) == 0)
470: return (tp);
471: return (NULL);
472: }
473:
474: /*
475: * Find the protox corresponding to name.
476: */
477: static struct protox *
478: name2protox(name)
479: char *name;
480: {
481: struct protox *tp;
482: char **alias; /* alias from p->aliases */
483: struct protoent *p;
484:
485: /*
486: * Try to find the name in the list of "well-known" names. If that
487: * fails, check if name is an alias for an Internet protocol.
488: */
489: if (tp = knownname(name))
490: return (tp);
491:
492: setprotoent(1); /* make protocol lookup cheaper */
493: while (p = getprotoent()) {
494: /* assert: name not same as p->name */
495: for (alias = p->p_aliases; *alias; alias++)
496: if (strcmp(name, *alias) == 0) {
497: endprotoent();
498: return (knownname(p->p_name));
499: }
500: }
501: endprotoent();
502: return (NULL);
503: }
504:
505: static void
506: usage()
507: {
508: (void)fprintf(stderr,
509: "usage: %s [-Aan] [-f address_family] [-M core] [-N system]\n", prog);
510: (void)fprintf(stderr,
511: " %s [-ghimnrs] [-f address_family] [-M core] [-N system]\n", prog);
512: (void)fprintf(stderr,
513: " %s [-n] [-I interface] [-M core] [-N system] [-w wait]\n", prog);
514: (void)fprintf(stderr,
515: " %s [-M core] [-N system] [-p protocol]\n", prog);
516: exit(1);
517: }