Annotation of src/usr.bin/netstat/main.c, Revision 1.51
1.51 ! itojun 1: /* $OpenBSD: main.c,v 1.50 2005/01/14 15:00:44 mcbride 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: #ifndef lint
34: char copyright[] =
35: "@(#) Copyright (c) 1983, 1988, 1993\n\
36: Regents of the University of California. All rights reserved.\n";
37: #endif /* not lint */
38:
39: #ifndef lint
40: #if 0
41: static char sccsid[] = "from: @(#)main.c 8.4 (Berkeley) 3/1/94";
42: #else
1.51 ! itojun 43: static char *rcsid = "$OpenBSD: main.c,v 1.50 2005/01/14 15:00:44 mcbride Exp $";
1.1 deraadt 44: #endif
45: #endif /* not lint */
46:
47: #include <sys/param.h>
48: #include <sys/file.h>
49: #include <sys/protosw.h>
50: #include <sys/socket.h>
51:
52: #include <netinet/in.h>
53:
54: #include <ctype.h>
55: #include <errno.h>
56: #include <kvm.h>
57: #include <limits.h>
58: #include <netdb.h>
59: #include <nlist.h>
60: #include <paths.h>
61: #include <stdio.h>
62: #include <stdlib.h>
63: #include <string.h>
64: #include <unistd.h>
65: #include "netstat.h"
66:
67: struct nlist nl[] = {
68: #define N_MBSTAT 0
69: { "_mbstat" },
70: #define N_IPSTAT 1
71: { "_ipstat" },
72: #define N_TCBTABLE 2
73: { "_tcbtable" },
74: #define N_TCPSTAT 3
75: { "_tcpstat" },
76: #define N_UDBTABLE 4
77: { "_udbtable" },
78: #define N_UDPSTAT 5
79: { "_udpstat" },
80: #define N_IFNET 6
81: { "_ifnet" },
82: #define N_IMP 7
83: { "_imp_softc" },
84: #define N_ICMPSTAT 8
85: { "_icmpstat" },
86: #define N_RTSTAT 9
87: { "_rtstat" },
88: #define N_UNIXSW 10
89: { "_unixsw" },
90: #define N_IDP 11
91: { "_nspcb"},
92: #define N_IDPSTAT 12
93: { "_idpstat"},
94: #define N_SPPSTAT 13
95: { "_spp_istat"},
96: #define N_NSERR 14
97: { "_ns_errstat"},
98: #define N_CLNPSTAT 15
99: { "_clnp_stat"},
100: #define IN_NOTUSED 16
101: { "_tp_inpcb" },
1.49 henning 102: #define ISO_NOTUSED 16
103: { "_tp_refinfo" },
1.1 deraadt 104: #define N_TPSTAT 18
105: { "_tp_stat" },
106: #define N_ESISSTAT 19
107: { "_esis_stat"},
108: #define N_NIMP 20
109: { "_nimp"},
110: #define N_RTREE 21
111: { "_rt_tables"},
112: #define N_CLTP 22
113: { "_cltb"},
114: #define N_CLTPSTAT 23
115: { "_cltpstat"},
116: #define N_NFILE 24
117: { "_nfile" },
118: #define N_FILE 25
119: { "_file" },
120: #define N_IGMPSTAT 26
121: { "_igmpstat" },
122: #define N_MRTPROTO 27
123: { "_ip_mrtproto" },
124: #define N_MRTSTAT 28
125: { "_mrtstat" },
126: #define N_MFCHASHTBL 29
127: { "_mfchashtbl" },
128: #define N_MFCHASH 30
129: { "_mfchash" },
130: #define N_VIFTABLE 31
131: { "_viftable" },
1.4 mickey 132: #define N_IPX 32
133: { "_ipxcbtable"},
134: #define N_IPXSTAT 33
135: { "_ipxstat"},
136: #define N_SPXSTAT 34
137: { "_spx_istat"},
138: #define N_IPXERR 35
139: { "_ipx_errstat"},
1.8 angelos 140: #define N_AHSTAT 36
141: { "_ahstat"},
142: #define N_ESPSTAT 37
143: { "_espstat"},
144: #define N_IP4STAT 38
1.21 angelos 145: { "_ipipstat"},
1.12 denny 146: #define N_DDPSTAT 39
147: { "_ddpstat"},
148: #define N_DDPCB 40
149: { "_ddpcb"},
1.18 angelos 150: #define N_ETHERIPSTAT 41
151: { "_etheripstat"},
1.19 itojun 152: #define N_IP6STAT 42
153: { "_ip6stat" },
154: #define N_ICMP6STAT 43
155: { "_icmp6stat" },
156: #define N_IPSECSTAT 44
157: { "_ipsecstat" },
158: #define N_IPSEC6STAT 45
159: { "_ipsec6stat" },
160: #define N_PIM6STAT 46
161: { "_pim6stat" },
162: #define N_MRT6PROTO 47
163: { "_ip6_mrtproto" },
164: #define N_MRT6STAT 48
165: { "_mrt6stat" },
166: #define N_MF6CTABLE 49
167: { "_mf6ctable" },
168: #define N_MIF6TABLE 50
169: { "_mif6table" },
1.25 provos 170: #define N_MBPOOL 51
171: { "_mbpool" },
172: #define N_MCLPOOL 52
173: { "_mclpool" },
1.29 mickey 174: #define N_IPCOMPSTAT 53
1.26 jjbg 175: { "_ipcompstat" },
1.32 itojun 176: #define N_RIP6STAT 54
177: { "_rip6stat" },
1.39 mcbride 178: #define N_CARPSTAT 55
179: { "_carpstats" },
1.40 markus 180: #define N_RAWIPTABLE 56
181: { "_rawcbtable" },
182: #define N_RAWIP6TABLE 57
183: { "_rawin6pcbtable" },
1.43 mcbride 184: #define N_PFSYNCSTAT 58
185: { "_pfsyncstats" },
1.50 mcbride 186: #define N_PIMSTAT 59
187: { "_pimstat" },
1.51 ! itojun 188: #define N_DCCPSTAT 60
! 189: { "_dccpstat" },
! 190: #define N_DCCPBTABLE 61
! 191: { "_dccpbtable" },
1.11 millert 192: { ""},
1.1 deraadt 193: };
194:
195: struct protox {
1.38 deraadt 196: u_char pr_index; /* index into nlist of cb head */
197: u_char pr_sindex; /* index into nlist of stat block */
198: u_char pr_wanted; /* 1 if wanted, 0 otherwise */
199: void (*pr_cblocks)(u_long, char *); /* control blocks printing routine */
200: void (*pr_stats)(u_long, char *); /* statistics printing routine */
201: char *pr_name; /* well-known name */
1.1 deraadt 202: } protox[] = {
203: { N_TCBTABLE, N_TCPSTAT, 1, protopr,
204: tcp_stats, "tcp" },
205: { N_UDBTABLE, N_UDPSTAT, 1, protopr,
206: udp_stats, "udp" },
1.51 ! itojun 207: #ifdef DCCP
! 208: { N_DCCPBTABLE, N_DCCPSTAT, 1, protopr,
! 209: dccp_stats, "dccp" },
! 210: #endif
1.40 markus 211: { N_RAWIPTABLE, N_IPSTAT, 1, protopr,
1.1 deraadt 212: ip_stats, "ip" },
213: { -1, N_ICMPSTAT, 1, 0,
214: icmp_stats, "icmp" },
215: { -1, N_IGMPSTAT, 1, 0,
216: igmp_stats, "igmp" },
1.8 angelos 217: { -1, N_AHSTAT, 1, 0,
1.15 angelos 218: ah_stats, "ah" },
1.8 angelos 219: { -1, N_ESPSTAT, 1, 0,
1.15 angelos 220: esp_stats, "esp" },
1.8 angelos 221: { -1, N_IP4STAT, 1, 0,
1.21 angelos 222: ipip_stats, "ipencap" },
1.18 angelos 223: { -1, N_ETHERIPSTAT, 1, 0,
224: etherip_stats,"etherip" },
1.29 mickey 225: { -1, N_IPCOMPSTAT, 1, 0,
226: ipcomp_stats, "ipcomp" },
1.44 deraadt 227: { -1, N_CARPSTAT, 1, 0,
228: carp_stats, "carp" },
229: { -1, N_PFSYNCSTAT, 1, 0,
230: pfsync_stats, "pfsync" },
1.50 mcbride 231: { -1, N_PIMSTAT, 1, 0,
232: pim_stats, "pim" },
1.1 deraadt 233: { -1, -1, 0, 0,
234: 0, 0 }
235: };
236:
1.19 itojun 237: #ifdef INET6
238: struct protox ip6protox[] = {
1.22 itojun 239: { N_TCBTABLE, N_TCPSTAT, 1, ip6protopr,
1.23 itojun 240: 0, "tcp" },
1.22 itojun 241: { N_UDBTABLE, N_UDPSTAT, 1, ip6protopr,
1.23 itojun 242: 0, "udp" },
1.51 ! itojun 243: #ifdef DCCP
! 244: { N_DCCPBTABLE, N_DCCPSTAT, 1, ip6protopr,
! 245: dccp_stats, "dccp" },
! 246: #endif
1.40 markus 247: { N_RAWIP6TABLE,N_IP6STAT, 1, ip6protopr,
1.19 itojun 248: ip6_stats, "ip6" },
249: { -1, N_ICMP6STAT, 1, 0,
250: icmp6_stats, "icmp6" },
251: { -1, N_PIM6STAT, 1, 0,
252: pim6_stats, "pim6" },
1.32 itojun 253: { -1, N_RIP6STAT, 1, 0,
254: rip6_stats, "rip6" },
1.19 itojun 255: { -1, -1, 0, 0,
256: 0, 0 }
257: };
258: #endif
259:
1.4 mickey 260: struct protox ipxprotox[] = {
261: { N_IPX, N_IPXSTAT, 1, ipxprotopr,
262: ipx_stats, "ipx" },
263: { N_IPX, N_SPXSTAT, 1, ipxprotopr,
264: spx_stats, "spx" },
265: { -1, -1, 0, 0,
266: 0, 0 }
267: };
268:
1.1 deraadt 269: struct protox nsprotox[] = {
270: { N_IDP, N_IDPSTAT, 1, nsprotopr,
271: idp_stats, "idp" },
272: { N_IDP, N_SPPSTAT, 1, nsprotopr,
273: spp_stats, "spp" },
274: { -1, N_NSERR, 1, 0,
275: nserr_stats, "ns_err" },
276: { -1, -1, 0, 0,
277: 0, 0 }
278: };
279:
1.12 denny 280: struct protox atalkprotox[] = {
281: { N_DDPCB, N_DDPSTAT, 1, atalkprotopr,
282: ddp_stats, "ddp" },
283: { -1, -1, 0, 0,
284: 0, 0 }
285: };
286:
1.19 itojun 287: #ifndef INET6
1.34 deraadt 288: struct protox *protoprotox[] = {
1.48 henning 289: protox, ipxprotox, nsprotox, atalkprotox, NULL
1.34 deraadt 290: };
1.19 itojun 291: #else
1.34 deraadt 292: struct protox *protoprotox[] = {
1.48 henning 293: protox, ip6protox, ipxprotox, nsprotox, atalkprotox, NULL
1.34 deraadt 294: };
1.19 itojun 295: #endif
1.1 deraadt 296:
1.30 millert 297: static void printproto(struct protox *, char *);
298: static void usage(void);
299: static struct protox *name2protox(char *);
300: static struct protox *knownname(char *);
1.1 deraadt 301:
302: kvm_t *kvmd;
303:
304: int
1.34 deraadt 305: main(int argc, char *argv[])
1.1 deraadt 306: {
307: extern char *optarg;
308: extern int optind;
1.28 mpech 309: struct protoent *p;
310: struct protox *tp = NULL; /* for printing cblocks & stats */
1.1 deraadt 311: int ch;
312: char *nlistf = NULL, *memf = NULL;
313: char buf[_POSIX2_LINE_MAX];
314:
315: af = AF_UNSPEC;
316:
1.46 cedric 317: while ((ch = getopt(argc, argv, "Aabdf:gI:ilM:mN:np:qrSstuvw:")) != -1)
1.31 deraadt 318: switch (ch) {
1.1 deraadt 319: case 'A':
320: Aflag = 1;
321: break;
322: case 'a':
323: aflag = 1;
1.24 camield 324: break;
325: case 'b':
326: bflag = 1;
1.1 deraadt 327: break;
328: case 'd':
329: dflag = 1;
330: break;
331: case 'f':
1.4 mickey 332: if (strcmp(optarg, "inet") == 0)
1.1 deraadt 333: af = AF_INET;
1.19 itojun 334: else if (strcmp(optarg, "inet6") == 0)
335: af = AF_INET6;
1.7 kstailey 336: else if (strcmp(optarg, "local") == 0)
337: af = AF_LOCAL;
1.1 deraadt 338: else if (strcmp(optarg, "unix") == 0)
339: af = AF_UNIX;
1.4 mickey 340: else if (strcmp(optarg, "ipx") == 0)
341: af = AF_IPX;
342: else if (strcmp(optarg, "ns") == 0)
343: af = AF_NS;
1.10 angelos 344: else if (strcmp(optarg, "encap") == 0)
1.16 angelos 345: af = PF_KEY;
1.12 denny 346: else if (strcmp(optarg, "atalk") == 0)
347: af = AF_APPLETALK;
1.1 deraadt 348: else {
349: (void)fprintf(stderr,
350: "%s: %s: unknown address family\n",
1.2 deraadt 351: __progname, optarg);
1.1 deraadt 352: exit(1);
353: }
354: break;
355: case 'g':
356: gflag = 1;
357: break;
1.2 deraadt 358: case 'I':
1.1 deraadt 359: iflag = 1;
1.2 deraadt 360: interface = optarg;
1.1 deraadt 361: break;
362: case 'i':
363: iflag = 1;
364: break;
1.19 itojun 365: case 'l':
366: lflag = 1;
367: break;
1.1 deraadt 368: case 'M':
369: memf = optarg;
370: break;
371: case 'm':
372: mflag = 1;
373: break;
374: case 'N':
375: nlistf = optarg;
376: break;
377: case 'n':
378: nflag = 1;
379: break;
380: case 'p':
381: if ((tp = name2protox(optarg)) == NULL) {
382: (void)fprintf(stderr,
1.42 jmc 383: "%s: %s: unknown protocol\n",
1.2 deraadt 384: __progname, optarg);
1.1 deraadt 385: exit(1);
386: }
387: pflag = 1;
1.27 brian 388: break;
389: case 'q':
390: qflag = 1;
1.1 deraadt 391: break;
392: case 'r':
393: rflag = 1;
1.46 cedric 394: break;
395: case 'S':
396: Sflag = 1;
1.1 deraadt 397: break;
398: case 's':
399: ++sflag;
400: break;
401: case 't':
402: tflag = 1;
403: break;
404: case 'u':
405: af = AF_UNIX;
1.13 peter 406: break;
407: case 'v':
408: vflag = 1;
1.1 deraadt 409: break;
410: case 'w':
411: interval = atoi(optarg);
412: iflag = 1;
413: break;
414: case '?':
415: default:
416: usage();
417: }
418: argv += optind;
419: argc -= optind;
420:
1.33 deraadt 421: /*
422: * Discard setgid privileges if not the running kernel so that bad
423: * guys can't print interesting stuff from kernel memory.
424: */
425: if (nlistf != NULL || memf != NULL) {
426: setegid(getgid());
427: setgid(getgid());
428: }
429:
430: if ((kvmd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY,
431: buf)) == NULL) {
432: fprintf(stderr, "%s: kvm_open: %s\n", __progname, buf);
433: exit(1);
434: }
435: setegid(getgid());
436: setgid(getgid());
437:
1.1 deraadt 438: #define BACKWARD_COMPATIBILITY
439: #ifdef BACKWARD_COMPATIBILITY
440: if (*argv) {
441: if (isdigit(**argv)) {
442: interval = atoi(*argv);
443: if (interval <= 0)
444: usage();
445: ++argv;
446: iflag = 1;
447: }
448: if (*argv) {
449: nlistf = *argv;
450: if (*++argv)
451: memf = *argv;
452: }
453: }
454: #endif
1.14 deraadt 455:
1.1 deraadt 456: if (kvm_nlist(kvmd, nl) < 0 || nl[0].n_type == 0) {
457: if (nlistf)
1.2 deraadt 458: fprintf(stderr, "%s: %s: no namelist\n", __progname,
459: nlistf);
1.1 deraadt 460: else
1.2 deraadt 461: fprintf(stderr, "%s: no namelist\n", __progname);
1.1 deraadt 462: exit(1);
463: }
464: if (mflag) {
1.25 provos 465: mbpr(nl[N_MBSTAT].n_value, nl[N_MBPOOL].n_value,
466: nl[N_MCLPOOL].n_value);
1.1 deraadt 467: exit(0);
468: }
469: if (pflag) {
1.45 markus 470: printproto(tp, tp->pr_name);
1.1 deraadt 471: exit(0);
472: }
473: /*
474: * Keep file descriptors open to avoid overhead
475: * of open/close on each call to get* routines.
476: */
477: sethostent(1);
478: setnetent(1);
479: if (iflag) {
480: intpr(interval, nl[N_IFNET].n_value);
481: exit(0);
482: }
483: if (rflag) {
484: if (sflag)
485: rt_stats(nl[N_RTSTAT].n_value);
486: else
487: routepr(nl[N_RTREE].n_value);
488: exit(0);
489: }
490: if (gflag) {
1.19 itojun 491: if (sflag) {
492: if (af == AF_INET || af == AF_UNSPEC)
493: mrt_stats(nl[N_MRTPROTO].n_value,
494: nl[N_MRTSTAT].n_value);
495: #ifdef INET6
496: if (af == AF_INET6 || af == AF_UNSPEC)
497: mrt6_stats(nl[N_MRT6PROTO].n_value,
498: nl[N_MRT6STAT].n_value);
499: #endif
500: }
501: else {
502: if (af == AF_INET || af == AF_UNSPEC)
503: mroutepr(nl[N_MRTPROTO].n_value,
504: nl[N_MFCHASHTBL].n_value,
505: nl[N_MFCHASH].n_value,
506: nl[N_VIFTABLE].n_value);
507: #ifdef INET6
508: if (af == AF_INET6 || af == AF_UNSPEC)
509: mroute6pr(nl[N_MRT6PROTO].n_value,
510: nl[N_MF6CTABLE].n_value,
511: nl[N_MIF6TABLE].n_value);
512: #endif
513: }
1.1 deraadt 514: exit(0);
515: }
516: if (af == AF_INET || af == AF_UNSPEC) {
517: setprotoent(1);
518: setservent(1);
519: /* ugh, this is O(MN) ... why do we do this? */
1.11 millert 520: while ((p = getprotoent())) {
1.1 deraadt 521: for (tp = protox; tp->pr_name; tp++)
522: if (strcmp(tp->pr_name, p->p_name) == 0)
523: break;
524: if (tp->pr_name == 0 || tp->pr_wanted == 0)
525: continue;
526: printproto(tp, p->p_name);
527: }
528: endprotoent();
529: }
1.19 itojun 530: #ifdef INET6
531: if (af == AF_INET6 || af == AF_UNSPEC)
532: for (tp = ip6protox; tp->pr_name; tp++)
533: printproto(tp, tp->pr_name);
534: #endif
1.4 mickey 535: if (af == AF_IPX || af == AF_UNSPEC)
536: for (tp = ipxprotox; tp->pr_name; tp++)
537: printproto(tp, tp->pr_name);
1.1 deraadt 538: if (af == AF_NS || af == AF_UNSPEC)
539: for (tp = nsprotox; tp->pr_name; tp++)
540: printproto(tp, tp->pr_name);
541: if ((af == AF_UNIX || af == AF_UNSPEC) && !sflag)
542: unixpr(nl[N_UNIXSW].n_value);
1.12 denny 543: if (af == AF_APPLETALK || af == AF_UNSPEC)
544: for (tp = atalkprotox; tp->pr_name; tp++)
545: printproto(tp, tp->pr_name);
1.1 deraadt 546: exit(0);
547: }
548:
549: /*
550: * Print out protocol statistics or control blocks (per sflag).
551: * If the interface was not specifically requested, and the symbol
552: * is not in the namelist, ignore this one.
553: */
554: static void
1.34 deraadt 555: printproto(struct protox *tp, char *name)
1.1 deraadt 556: {
1.38 deraadt 557: void (*pr)(u_long, char *);
1.35 dhartmei 558: u_char i;
1.1 deraadt 559:
560: if (sflag) {
561: pr = tp->pr_stats;
1.35 dhartmei 562: i = tp->pr_sindex;
1.1 deraadt 563: } else {
564: pr = tp->pr_cblocks;
1.35 dhartmei 565: i = tp->pr_index;
1.1 deraadt 566: }
1.35 dhartmei 567: if (pr != NULL && i < sizeof(nl) / sizeof(nl[0]) &&
568: (nl[i].n_value || af != AF_UNSPEC))
569: (*pr)(nl[i].n_value, name);
1.1 deraadt 570: }
571:
572: /*
573: * Read kernel memory, return 0 on success.
574: */
575: int
1.34 deraadt 576: kread(u_long addr, char *buf, int size)
1.1 deraadt 577: {
578:
579: if (kvm_read(kvmd, addr, buf, size) != size) {
1.2 deraadt 580: (void)fprintf(stderr, "%s: %s\n", __progname,
1.1 deraadt 581: kvm_geterr(kvmd));
582: return (-1);
583: }
584: return (0);
585: }
586:
587: char *
1.34 deraadt 588: plural(int n)
1.1 deraadt 589: {
590: return (n != 1 ? "s" : "");
591: }
592:
593: char *
1.34 deraadt 594: plurales(int n)
1.1 deraadt 595: {
596: return (n != 1 ? "es" : "");
597: }
598:
599: /*
600: * Find the protox for the given "well-known" name.
601: */
602: static struct protox *
1.34 deraadt 603: knownname(char *name)
1.1 deraadt 604: {
605: struct protox **tpp, *tp;
606:
607: for (tpp = protoprotox; *tpp; tpp++)
608: for (tp = *tpp; tp->pr_name; tp++)
609: if (strcmp(tp->pr_name, name) == 0)
610: return (tp);
611: return (NULL);
612: }
613:
614: /*
615: * Find the protox corresponding to name.
616: */
617: static struct protox *
1.34 deraadt 618: name2protox(char *name)
1.1 deraadt 619: {
620: struct protox *tp;
621: char **alias; /* alias from p->aliases */
622: struct protoent *p;
623:
624: /*
625: * Try to find the name in the list of "well-known" names. If that
626: * fails, check if name is an alias for an Internet protocol.
627: */
1.11 millert 628: if ((tp = knownname(name)))
1.1 deraadt 629: return (tp);
630:
631: setprotoent(1); /* make protocol lookup cheaper */
1.11 millert 632: while ((p = getprotoent())) {
1.1 deraadt 633: /* assert: name not same as p->name */
634: for (alias = p->p_aliases; *alias; alias++)
635: if (strcmp(name, *alias) == 0) {
636: endprotoent();
637: return (knownname(p->p_name));
638: }
639: }
640: endprotoent();
641: return (NULL);
642: }
643:
644: static void
1.34 deraadt 645: usage(void)
1.1 deraadt 646: {
647: (void)fprintf(stderr,
1.2 deraadt 648: "usage: %s [-Aan] [-f address_family] [-M core] [-N system]\n", __progname);
1.1 deraadt 649: (void)fprintf(stderr,
1.47 jmc 650: " %s [-bdgilmnqrSstu] [-f address_family] [-M core] [-N system]\n", __progname);
1.1 deraadt 651: (void)fprintf(stderr,
1.37 jmc 652: " %s [-bdn] [-I interface] [-M core] [-N system] [-w wait]\n", __progname);
1.1 deraadt 653: (void)fprintf(stderr,
1.47 jmc 654: " %s [-s] [-M core] [-N system] [-p protocol]\n", __progname);
1.37 jmc 655: (void)fprintf(stderr,
1.41 jmc 656: " %s [-a] [-f address_family] [-i | -I interface]\n", __progname);
1.1 deraadt 657: exit(1);
658: }
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