Annotation of src/usr.bin/netstat/main.c, Revision 1.121
1.121 ! deraadt 1: /* $OpenBSD: main.c,v 1.120 2020/06/16 14:03:42 jmc 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:
1.103 deraadt 33: #include <sys/types.h>
1.1 deraadt 34: #include <sys/protosw.h>
35: #include <sys/socket.h>
1.86 claudio 36: #include <sys/sysctl.h>
1.1 deraadt 37:
1.68 claudio 38: #include <net/route.h>
1.1 deraadt 39: #include <netinet/in.h>
40:
41: #include <ctype.h>
1.61 djm 42: #include <err.h>
1.1 deraadt 43: #include <errno.h>
1.96 guenther 44: #include <fcntl.h>
1.1 deraadt 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[] = {
1.116 mpi 57: #define N_AFMAP 0
58: { "_afmap"},
59: #define N_AF2IDX 1
60: { "_af2idx" },
61: #define N_AF2IDXMAX 2
62: { "_af2idx_max" },
1.71 deraadt 63:
1.87 bluhm 64: { "" }
1.1 deraadt 65: };
66:
67: struct protox {
1.87 bluhm 68: void (*pr_stats)(char *); /* statistics printing routine */
69: char *pr_name; /* well-known name */
1.106 claudio 70: int pr_proto; /* protocol number */
1.1 deraadt 71: } protox[] = {
1.106 claudio 72: { ip_stats, "ip", IPPROTO_IPV4 },
73: { icmp_stats, "icmp", 0 },
74: { igmp_stats, "igmp", 0 },
75: { ipip_stats, "ipencap", 0 },
76: { tcp_stats, "tcp", IPPROTO_TCP },
77: { udp_stats, "udp", IPPROTO_UDP },
1.113 mpi 78: { ipsec_stats, "ipsec", 0 },
1.106 claudio 79: { esp_stats, "esp", 0 },
80: { ah_stats, "ah", 0 },
81: { etherip_stats,"etherip", 0 },
82: { ipcomp_stats, "ipcomp", 0 },
83: { carp_stats, "carp", 0 },
84: { pfsync_stats, "pfsync", 0 },
85: { div_stats, "divert", IPPROTO_DIVERT },
86: { pflow_stats, "pflow", 0 },
87: { NULL, NULL, 0 }
1.1 deraadt 88: };
89:
1.19 itojun 90: struct protox ip6protox[] = {
1.106 claudio 91: { ip6_stats, "ip6", IPPROTO_IPV6 },
92: { div6_stats, "divert6", IPPROTO_DIVERT },
93: { icmp6_stats, "icmp6", 0 },
94: { rip6_stats, "rip6", 0 },
95: { NULL, NULL, 0 }
1.19 itojun 96: };
97:
1.34 deraadt 98: struct protox *protoprotox[] = {
1.89 henning 99: protox, ip6protox, NULL
1.34 deraadt 100: };
1.1 deraadt 101:
1.30 millert 102: static void usage(void);
103: static struct protox *name2protox(char *);
104: static struct protox *knownname(char *);
1.116 mpi 105: void gettable(u_int);
1.86 claudio 106:
1.1 deraadt 107: kvm_t *kvmd;
1.121 ! deraadt 108:
! 109: int Aflag; /* show addresses of protocol control block */
! 110: int aflag; /* show all sockets (including servers) */
! 111: int Bflag; /* show TCP send and receive buffer sizes */
! 112: int bflag; /* show bytes instead of packets */
! 113: int dflag; /* show i/f dropped packets */
! 114: int Fflag; /* show routes whose gateways are in specified AF */
! 115: int gflag; /* show group (multicast) routing or stats */
! 116: int hflag; /* print human numbers */
! 117: int iflag; /* show interfaces */
! 118: int lflag; /* show only listening sockets (only servers), */
! 119: /* with -g, show routing table with use and ref */
! 120: int mflag; /* show memory stats */
! 121: int nflag; /* show addresses numerically */
! 122: int pflag; /* show given protocol */
! 123: int Pflag; /* show given PCB */
! 124: int qflag; /* only display non-zero values for output */
! 125: int rflag; /* show routing tables (or routing stats) */
! 126: int Rflag; /* show rdomain and rtable summary */
! 127: int sflag; /* show protocol statistics */
! 128: int tflag; /* show i/f watchdog timers */
! 129: int vflag; /* be verbose */
! 130: int Wflag; /* show net80211 protocol statistics */
! 131:
! 132: int interval; /* repeat interval for i/f stats */
! 133:
! 134: char *interface; /* desired i/f for stats, or NULL for all i/fs */
! 135:
! 136: int af; /* address family */
1.1 deraadt 137:
138: int
1.34 deraadt 139: main(int argc, char *argv[])
1.1 deraadt 140: {
141: extern char *optarg;
142: extern int optind;
1.68 claudio 143: const char *errstr;
1.28 mpech 144: struct protox *tp = NULL; /* for printing cblocks & stats */
1.1 deraadt 145: int ch;
1.59 markus 146: char *nlistf = NULL, *memf = NULL, *ep;
1.1 deraadt 147: char buf[_POSIX2_LINE_MAX];
1.59 markus 148: u_long pcbaddr = 0;
1.91 mikeb 149: u_int tableid;
1.86 claudio 150: int Tflag = 0;
1.82 tedu 151: int repeatcount = 0;
1.106 claudio 152: int proto = 0;
1.109 mpi 153: int need_nlist, kvm_flags = O_RDONLY;
1.95 deraadt 154:
1.1 deraadt 155: af = AF_UNSPEC;
1.91 mikeb 156: tableid = getrtable();
1.1 deraadt 157:
1.88 jsing 158: while ((ch = getopt(argc, argv,
1.117 remi 159: "AaBbc:deFf:ghI:iLlM:mN:np:P:qRrsT:tuvW:w:")) != -1)
1.31 deraadt 160: switch (ch) {
1.1 deraadt 161: case 'A':
162: Aflag = 1;
163: break;
164: case 'a':
165: aflag = 1;
1.24 camield 166: break;
1.88 jsing 167: case 'B':
168: Bflag = 1;
169: break;
1.24 camield 170: case 'b':
171: bflag = 1;
1.1 deraadt 172: break;
1.82 tedu 173: case 'c':
174: repeatcount = strtonum(optarg, 1, INT_MAX, &errstr);
1.100 tedu 175: if (errstr)
176: errx(1, "count is %s", errstr);
1.82 tedu 177: break;
1.1 deraadt 178: case 'd':
1.114 dlg 179: dflag = IF_SHOW_DROP;
180: break;
181: case 'e':
182: dflag = IF_SHOW_ERRS;
1.64 pyr 183: break;
184: case 'F':
185: Fflag = 1;
1.1 deraadt 186: break;
187: case 'f':
1.4 mickey 188: if (strcmp(optarg, "inet") == 0)
1.1 deraadt 189: af = AF_INET;
1.19 itojun 190: else if (strcmp(optarg, "inet6") == 0)
191: af = AF_INET6;
1.7 kstailey 192: else if (strcmp(optarg, "local") == 0)
193: af = AF_LOCAL;
1.1 deraadt 194: else if (strcmp(optarg, "unix") == 0)
195: af = AF_UNIX;
1.75 claudio 196: else if (strcmp(optarg, "mpls") == 0)
197: af = AF_MPLS;
1.1 deraadt 198: else {
199: (void)fprintf(stderr,
200: "%s: %s: unknown address family\n",
1.2 deraadt 201: __progname, optarg);
1.1 deraadt 202: exit(1);
203: }
204: break;
205: case 'g':
206: gflag = 1;
1.93 tedu 207: break;
208: case 'h':
209: hflag = 1;
1.1 deraadt 210: break;
1.2 deraadt 211: case 'I':
1.1 deraadt 212: iflag = 1;
1.2 deraadt 213: interface = optarg;
1.1 deraadt 214: break;
215: case 'i':
216: iflag = 1;
217: break;
1.19 itojun 218: case 'l':
219: lflag = 1;
220: break;
1.1 deraadt 221: case 'M':
222: memf = optarg;
223: break;
224: case 'm':
225: mflag = 1;
226: break;
227: case 'N':
228: nlistf = optarg;
229: break;
230: case 'n':
231: nflag = 1;
232: break;
233: case 'p':
234: if ((tp = name2protox(optarg)) == NULL) {
235: (void)fprintf(stderr,
1.42 jmc 236: "%s: %s: unknown protocol\n",
1.2 deraadt 237: __progname, optarg);
1.1 deraadt 238: exit(1);
239: }
240: pflag = 1;
1.27 brian 241: break;
1.59 markus 242: case 'P':
243: errno = 0;
244: pcbaddr = strtoul(optarg, &ep, 16);
245: if (optarg[0] == '\0' || *ep != '\0' ||
246: errno == ERANGE) {
247: (void)fprintf(stderr,
248: "%s: %s: invalid PCB address\n",
249: __progname, optarg);
250: exit(1);
251: }
252: Pflag = 1;
253: break;
1.27 brian 254: case 'q':
255: qflag = 1;
1.1 deraadt 256: break;
1.117 remi 257: case 'R':
258: Rflag = 1;
259: break;
1.1 deraadt 260: case 'r':
261: rflag = 1;
1.46 cedric 262: break;
1.1 deraadt 263: case 's':
264: ++sflag;
265: break;
1.68 claudio 266: case 'T':
1.116 mpi 267: tableid = strtonum(optarg, 0, RT_TABLEID_MAX, &errstr);
268: if (errstr)
269: errx(1, "invalid table id: %s", errstr);
1.86 claudio 270: Tflag = 1;
1.68 claudio 271: break;
1.1 deraadt 272: case 't':
273: tflag = 1;
274: break;
275: case 'u':
276: af = AF_UNIX;
1.13 peter 277: break;
278: case 'v':
279: vflag = 1;
1.1 deraadt 280: break;
1.56 reyk 281: case 'W':
282: Wflag = 1;
283: interface = optarg;
284: break;
1.1 deraadt 285: case 'w':
1.100 tedu 286: interval = strtonum(optarg, 1, INT_MAX, &errstr);
287: if (errstr)
288: errx(1, "interval is %s", errstr);
1.1 deraadt 289: iflag = 1;
290: break;
291: case '?':
292: default:
293: usage();
294: }
295: argv += optind;
296: argc -= optind;
297:
1.108 tedu 298: if (argc) {
299: interval = strtonum(*argv, 1, INT_MAX, &errstr);
300: if (errstr)
301: errx(1, "interval is %s", errstr);
302: ++argv;
303: --argc;
304: iflag = 1;
1.84 lum 305: }
1.107 tedu 306: if (argc)
307: usage();
1.84 lum 308:
1.56 reyk 309: /*
1.106 claudio 310: * Show per-interface statistics which don't need access to
311: * kernel memory (they're using IOCTLs)
1.33 deraadt 312: */
1.106 claudio 313: if (Wflag) {
314: if (interface == NULL)
315: usage();
316: net80211_ifstats(interface);
317: exit(0);
1.33 deraadt 318: }
1.61 djm 319:
1.1 deraadt 320: if (mflag) {
1.70 deraadt 321: mbpr();
1.1 deraadt 322: exit(0);
323: }
324: if (iflag) {
1.82 tedu 325: intpr(interval, repeatcount);
1.1 deraadt 326: exit(0);
327: }
1.106 claudio 328: if (sflag) {
329: if (rflag) {
1.73 claudio 330: rt_stats();
1.106 claudio 331: } else if (gflag) {
1.19 itojun 332: if (af == AF_INET || af == AF_UNSPEC)
1.71 deraadt 333: mrt_stats();
1.19 itojun 334: if (af == AF_INET6 || af == AF_UNSPEC)
1.71 deraadt 335: mrt6_stats();
1.106 claudio 336: } else if (pflag && tp->pr_name) {
337: (*tp->pr_stats)(tp->pr_name);
1.70 deraadt 338: } else {
1.19 itojun 339: if (af == AF_INET || af == AF_UNSPEC)
1.106 claudio 340: for (tp = protox; tp->pr_name; tp++)
341: (*tp->pr_stats)(tp->pr_name);
1.19 itojun 342: if (af == AF_INET6 || af == AF_UNSPEC)
1.106 claudio 343: for (tp = ip6protox; tp->pr_name; tp++)
344: (*tp->pr_stats)(tp->pr_name);
1.19 itojun 345: }
1.1 deraadt 346: exit(0);
347: }
1.106 claudio 348: if (gflag) {
349: if (af == AF_INET || af == AF_UNSPEC)
350: mroutepr();
351: if (af == AF_INET6 || af == AF_UNSPEC)
352: mroute6pr();
1.117 remi 353: exit(0);
354: }
355:
356: if (Rflag) {
357: rdomainpr();
1.106 claudio 358: exit(0);
359: }
360:
361: /*
362: * The remaining code may need kvm so lets try to open it.
363: * -r and -P are the only bits left that actually can use this.
364: */
1.109 mpi 365: need_nlist = (nlistf != NULL) || (memf != NULL) || (Aflag && rflag);
366: if (!need_nlist && !Pflag)
367: kvm_flags |= KVM_NO_FILES;
1.106 claudio 368:
1.109 mpi 369: if ((kvmd = kvm_openfiles(nlistf, memf, NULL, kvm_flags, buf)) == NULL)
1.106 claudio 370: errx(1, "kvm_openfiles: %s", buf);
371:
372: if (need_nlist && (kvm_nlist(kvmd, nl) < 0 || nl[0].n_type == 0)) {
373: if (nlistf)
374: errx(1, "%s: no namelist", nlistf);
375: else
376: errx(1, "no namelist");
1.76 gollo 377: }
1.106 claudio 378:
1.116 mpi 379: if (!need_nlist && Tflag)
380: gettable(tableid);
381:
1.106 claudio 382: if (rflag) {
383: if (Aflag || nlistf != NULL || memf != NULL)
1.116 mpi 384: routepr(nl[N_AFMAP].n_value, nl[N_AF2IDX].n_value,
385: nl[N_AF2IDXMAX].n_value, tableid);
1.106 claudio 386: else
387: p_rttables(af, tableid);
388: exit(0);
1.1 deraadt 389: }
390:
1.106 claudio 391: if (pflag) {
392: if (tp->pr_proto == 0)
393: errx(1, "no protocol handler for protocol %s",
394: tp->pr_name);
395: else
396: proto = tp->pr_proto;
1.1 deraadt 397: }
1.106 claudio 398:
399: protopr(kvmd, pcbaddr, tableid, proto);
400: exit(0);
1.1 deraadt 401: }
402:
403: /*
404: * Read kernel memory, return 0 on success.
405: */
406: int
1.53 jaredy 407: kread(u_long addr, void *buf, int size)
1.1 deraadt 408: {
409:
410: if (kvm_read(kvmd, addr, buf, size) != size) {
1.2 deraadt 411: (void)fprintf(stderr, "%s: %s\n", __progname,
1.1 deraadt 412: kvm_geterr(kvmd));
413: return (-1);
414: }
415: return (0);
416: }
417:
418: char *
1.77 claudio 419: plural(u_int64_t n)
1.1 deraadt 420: {
421: return (n != 1 ? "s" : "");
422: }
423:
424: char *
1.77 claudio 425: plurales(u_int64_t n)
1.1 deraadt 426: {
427: return (n != 1 ? "es" : "");
1.110 bluhm 428: }
429:
430: char *
431: pluralys(u_int64_t n)
432: {
433: return (n != 1 ? "ies" : "y");
1.1 deraadt 434: }
435:
436: /*
437: * Find the protox for the given "well-known" name.
438: */
439: static struct protox *
1.34 deraadt 440: knownname(char *name)
1.1 deraadt 441: {
442: struct protox **tpp, *tp;
443:
444: for (tpp = protoprotox; *tpp; tpp++)
445: for (tp = *tpp; tp->pr_name; tp++)
446: if (strcmp(tp->pr_name, name) == 0)
447: return (tp);
448: return (NULL);
449: }
450:
451: /*
452: * Find the protox corresponding to name.
453: */
454: static struct protox *
1.34 deraadt 455: name2protox(char *name)
1.1 deraadt 456: {
457: struct protox *tp;
458: char **alias; /* alias from p->aliases */
459: struct protoent *p;
460:
461: /*
462: * Try to find the name in the list of "well-known" names. If that
463: * fails, check if name is an alias for an Internet protocol.
464: */
1.11 millert 465: if ((tp = knownname(name)))
1.1 deraadt 466: return (tp);
467:
468: setprotoent(1); /* make protocol lookup cheaper */
1.11 millert 469: while ((p = getprotoent())) {
1.1 deraadt 470: /* assert: name not same as p->name */
471: for (alias = p->p_aliases; *alias; alias++)
472: if (strcmp(name, *alias) == 0) {
473: endprotoent();
474: return (knownname(p->p_name));
475: }
476: }
477: endprotoent();
478: return (NULL);
479: }
480:
481: static void
1.34 deraadt 482: usage(void)
1.1 deraadt 483: {
484: (void)fprintf(stderr,
1.120 jmc 485: "usage: netstat [-AaBln] [-M core] [-N system] [-p protocol] [-T rtable]\n"
486: " netstat -W interface\n"
487: " netstat -m\n"
488: " netstat -I interface | -i [-bdehnqt]\n"
489: " netstat -w wait [-bdehnqt] [-c count] [-I interface]\n"
490: " netstat -s [-gru] [-f address_family] [-p protocol]\n"
491: " netstat -g [-lnu] [-f address_family]\n"
492: " netstat -R\n"
493: " netstat -r [-AFu] [-f address_family] [-M core] [-N system] [-p protocol]\n"
1.115 jmc 494: " [-T rtable]\n"
1.120 jmc 495: " netstat -P pcbaddr [-v] [-M core] [-N system]\n");
1.1 deraadt 496: exit(1);
497: }
1.86 claudio 498:
1.116 mpi 499: void
500: gettable(u_int tableid)
1.86 claudio 501: {
502: struct rt_tableinfo info;
503: int mib[6];
504: size_t len;
505:
506: mib[0] = CTL_NET;
1.101 guenther 507: mib[1] = PF_ROUTE;
1.86 claudio 508: mib[2] = 0;
509: mib[3] = 0;
510: mib[4] = NET_RT_TABLE;
511: mib[5] = tableid;
512:
513: len = sizeof(info);
514: if (sysctl(mib, 6, &info, &len, NULL, 0) == -1)
1.97 deraadt 515: err(1, "routing table %d", tableid);
1.86 claudio 516: }
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