Annotation of src/usr.bin/netstat/main.c, Revision 1.114
1.114 ! dlg 1: /* $OpenBSD: main.c,v 1.113 2018/08/13 14:36:54 mpi 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[] = {
1.106 claudio 57: #define N_RTREE 0
1.71 deraadt 58: { "_rt_tables"},
1.106 claudio 59: #define N_RTMASK 1
1.71 deraadt 60: { "_mask_rnhead" },
1.106 claudio 61: #define N_AF2RTAFIDX 2
1.71 deraadt 62: { "_af2rtafidx" },
1.106 claudio 63: #define N_RTBLIDMAX 3
1.71 deraadt 64: { "_rtbl_id_max" },
65:
1.87 bluhm 66: { "" }
1.1 deraadt 67: };
68:
69: struct protox {
1.87 bluhm 70: void (*pr_stats)(char *); /* statistics printing routine */
71: char *pr_name; /* well-known name */
1.106 claudio 72: int pr_proto; /* protocol number */
1.1 deraadt 73: } protox[] = {
1.106 claudio 74: { ip_stats, "ip", IPPROTO_IPV4 },
75: { icmp_stats, "icmp", 0 },
76: { igmp_stats, "igmp", 0 },
77: { ipip_stats, "ipencap", 0 },
78: { tcp_stats, "tcp", IPPROTO_TCP },
79: { udp_stats, "udp", IPPROTO_UDP },
1.113 mpi 80: { ipsec_stats, "ipsec", 0 },
1.106 claudio 81: { esp_stats, "esp", 0 },
82: { ah_stats, "ah", 0 },
83: { etherip_stats,"etherip", 0 },
84: { ipcomp_stats, "ipcomp", 0 },
85: { carp_stats, "carp", 0 },
86: { pfsync_stats, "pfsync", 0 },
87: { div_stats, "divert", IPPROTO_DIVERT },
88: { pflow_stats, "pflow", 0 },
89: { NULL, NULL, 0 }
1.1 deraadt 90: };
91:
1.19 itojun 92: struct protox ip6protox[] = {
1.106 claudio 93: { ip6_stats, "ip6", IPPROTO_IPV6 },
94: { div6_stats, "divert6", IPPROTO_DIVERT },
95: { icmp6_stats, "icmp6", 0 },
96: { rip6_stats, "rip6", 0 },
97: { NULL, NULL, 0 }
1.19 itojun 98: };
99:
1.34 deraadt 100: struct protox *protoprotox[] = {
1.89 henning 101: protox, ip6protox, NULL
1.34 deraadt 102: };
1.1 deraadt 103:
1.30 millert 104: static void usage(void);
105: static struct protox *name2protox(char *);
106: static struct protox *knownname(char *);
1.86 claudio 107: u_int gettable(const char *);
108:
1.1 deraadt 109: kvm_t *kvmd;
110:
111: int
1.34 deraadt 112: main(int argc, char *argv[])
1.1 deraadt 113: {
114: extern char *optarg;
115: extern int optind;
1.68 claudio 116: const char *errstr;
1.28 mpech 117: struct protox *tp = NULL; /* for printing cblocks & stats */
1.1 deraadt 118: int ch;
1.59 markus 119: char *nlistf = NULL, *memf = NULL, *ep;
1.1 deraadt 120: char buf[_POSIX2_LINE_MAX];
1.59 markus 121: u_long pcbaddr = 0;
1.91 mikeb 122: u_int tableid;
1.86 claudio 123: int Tflag = 0;
1.82 tedu 124: int repeatcount = 0;
1.106 claudio 125: int proto = 0;
1.109 mpi 126: int need_nlist, kvm_flags = O_RDONLY;
1.95 deraadt 127:
1.1 deraadt 128: af = AF_UNSPEC;
1.91 mikeb 129: tableid = getrtable();
1.1 deraadt 130:
1.88 jsing 131: while ((ch = getopt(argc, argv,
1.114 ! dlg 132: "AaBbc:deFf:ghI:iLlM:mN:np:P:qrsT:tuvW:w:")) != -1)
1.31 deraadt 133: switch (ch) {
1.1 deraadt 134: case 'A':
135: Aflag = 1;
136: break;
137: case 'a':
138: aflag = 1;
1.24 camield 139: break;
1.88 jsing 140: case 'B':
141: Bflag = 1;
142: break;
1.24 camield 143: case 'b':
144: bflag = 1;
1.1 deraadt 145: break;
1.82 tedu 146: case 'c':
147: repeatcount = strtonum(optarg, 1, INT_MAX, &errstr);
1.100 tedu 148: if (errstr)
149: errx(1, "count is %s", errstr);
1.82 tedu 150: break;
1.1 deraadt 151: case 'd':
1.114 ! dlg 152: dflag = IF_SHOW_DROP;
! 153: break;
! 154: case 'e':
! 155: dflag = IF_SHOW_ERRS;
1.64 pyr 156: break;
157: case 'F':
158: Fflag = 1;
1.1 deraadt 159: break;
160: case 'f':
1.4 mickey 161: if (strcmp(optarg, "inet") == 0)
1.1 deraadt 162: af = AF_INET;
1.19 itojun 163: else if (strcmp(optarg, "inet6") == 0)
164: af = AF_INET6;
1.7 kstailey 165: else if (strcmp(optarg, "local") == 0)
166: af = AF_LOCAL;
1.1 deraadt 167: else if (strcmp(optarg, "unix") == 0)
168: af = AF_UNIX;
1.75 claudio 169: else if (strcmp(optarg, "mpls") == 0)
170: af = AF_MPLS;
1.63 claudio 171: else if (strcmp(optarg, "mask") == 0)
172: af = 0xff;
1.1 deraadt 173: else {
174: (void)fprintf(stderr,
175: "%s: %s: unknown address family\n",
1.2 deraadt 176: __progname, optarg);
1.1 deraadt 177: exit(1);
178: }
179: break;
180: case 'g':
181: gflag = 1;
1.93 tedu 182: break;
183: case 'h':
184: hflag = 1;
1.1 deraadt 185: break;
1.2 deraadt 186: case 'I':
1.1 deraadt 187: iflag = 1;
1.2 deraadt 188: interface = optarg;
1.1 deraadt 189: break;
190: case 'i':
191: iflag = 1;
192: break;
1.19 itojun 193: case 'l':
194: lflag = 1;
195: break;
1.1 deraadt 196: case 'M':
197: memf = optarg;
198: break;
199: case 'm':
200: mflag = 1;
201: break;
202: case 'N':
203: nlistf = optarg;
204: break;
205: case 'n':
206: nflag = 1;
207: break;
208: case 'p':
209: if ((tp = name2protox(optarg)) == NULL) {
210: (void)fprintf(stderr,
1.42 jmc 211: "%s: %s: unknown protocol\n",
1.2 deraadt 212: __progname, optarg);
1.1 deraadt 213: exit(1);
214: }
215: pflag = 1;
1.27 brian 216: break;
1.59 markus 217: case 'P':
218: errno = 0;
219: pcbaddr = strtoul(optarg, &ep, 16);
220: if (optarg[0] == '\0' || *ep != '\0' ||
221: errno == ERANGE) {
222: (void)fprintf(stderr,
223: "%s: %s: invalid PCB address\n",
224: __progname, optarg);
225: exit(1);
226: }
227: Pflag = 1;
228: break;
1.27 brian 229: case 'q':
230: qflag = 1;
1.1 deraadt 231: break;
232: case 'r':
233: rflag = 1;
1.46 cedric 234: break;
1.1 deraadt 235: case 's':
236: ++sflag;
237: break;
1.68 claudio 238: case 'T':
1.86 claudio 239: Tflag = 1;
240: tableid = gettable(optarg);
1.68 claudio 241: break;
1.1 deraadt 242: case 't':
243: tflag = 1;
244: break;
245: case 'u':
246: af = AF_UNIX;
1.13 peter 247: break;
248: case 'v':
249: vflag = 1;
1.1 deraadt 250: break;
1.56 reyk 251: case 'W':
252: Wflag = 1;
253: interface = optarg;
254: break;
1.1 deraadt 255: case 'w':
1.100 tedu 256: interval = strtonum(optarg, 1, INT_MAX, &errstr);
257: if (errstr)
258: errx(1, "interval is %s", errstr);
1.1 deraadt 259: iflag = 1;
260: break;
261: case '?':
262: default:
263: usage();
264: }
265: argv += optind;
266: argc -= optind;
267:
1.108 tedu 268: if (argc) {
269: interval = strtonum(*argv, 1, INT_MAX, &errstr);
270: if (errstr)
271: errx(1, "interval is %s", errstr);
272: ++argv;
273: --argc;
274: iflag = 1;
1.84 lum 275: }
1.107 tedu 276: if (argc)
277: usage();
1.84 lum 278:
1.56 reyk 279: /*
1.106 claudio 280: * Show per-interface statistics which don't need access to
281: * kernel memory (they're using IOCTLs)
1.33 deraadt 282: */
1.106 claudio 283: if (Wflag) {
284: if (interface == NULL)
285: usage();
286: net80211_ifstats(interface);
287: exit(0);
1.33 deraadt 288: }
1.61 djm 289:
1.1 deraadt 290: if (mflag) {
1.70 deraadt 291: mbpr();
1.1 deraadt 292: exit(0);
293: }
294: if (iflag) {
1.82 tedu 295: intpr(interval, repeatcount);
1.1 deraadt 296: exit(0);
297: }
1.106 claudio 298: if (sflag) {
299: if (rflag) {
1.73 claudio 300: rt_stats();
1.106 claudio 301: } else if (gflag) {
1.19 itojun 302: if (af == AF_INET || af == AF_UNSPEC)
1.71 deraadt 303: mrt_stats();
1.19 itojun 304: if (af == AF_INET6 || af == AF_UNSPEC)
1.71 deraadt 305: mrt6_stats();
1.106 claudio 306: } else if (pflag && tp->pr_name) {
307: (*tp->pr_stats)(tp->pr_name);
1.70 deraadt 308: } else {
1.19 itojun 309: if (af == AF_INET || af == AF_UNSPEC)
1.106 claudio 310: for (tp = protox; tp->pr_name; tp++)
311: (*tp->pr_stats)(tp->pr_name);
1.19 itojun 312: if (af == AF_INET6 || af == AF_UNSPEC)
1.106 claudio 313: for (tp = ip6protox; tp->pr_name; tp++)
314: (*tp->pr_stats)(tp->pr_name);
1.19 itojun 315: }
1.1 deraadt 316: exit(0);
317: }
1.106 claudio 318: if (gflag) {
319: if (af == AF_INET || af == AF_UNSPEC)
320: mroutepr();
321: if (af == AF_INET6 || af == AF_UNSPEC)
322: mroute6pr();
323: exit(0);
324: }
325:
326: /*
327: * The remaining code may need kvm so lets try to open it.
328: * -r and -P are the only bits left that actually can use this.
329: */
1.109 mpi 330: need_nlist = (nlistf != NULL) || (memf != NULL) || (Aflag && rflag);
331: if (!need_nlist && !Pflag)
332: kvm_flags |= KVM_NO_FILES;
1.106 claudio 333:
1.109 mpi 334: if ((kvmd = kvm_openfiles(nlistf, memf, NULL, kvm_flags, buf)) == NULL)
1.106 claudio 335: errx(1, "kvm_openfiles: %s", buf);
336:
337: if (need_nlist && (kvm_nlist(kvmd, nl) < 0 || nl[0].n_type == 0)) {
338: if (nlistf)
339: errx(1, "%s: no namelist", nlistf);
340: else
341: errx(1, "no namelist");
1.76 gollo 342: }
1.106 claudio 343:
344: if (rflag) {
345: if (Aflag || nlistf != NULL || memf != NULL)
346: routepr(nl[N_RTREE].n_value, nl[N_RTMASK].n_value,
347: nl[N_AF2RTAFIDX].n_value, nl[N_RTBLIDMAX].n_value,
348: tableid);
349: else
350: p_rttables(af, tableid);
351: exit(0);
1.1 deraadt 352: }
353:
1.106 claudio 354: if (pflag) {
355: if (tp->pr_proto == 0)
356: errx(1, "no protocol handler for protocol %s",
357: tp->pr_name);
358: else
359: proto = tp->pr_proto;
1.1 deraadt 360: }
1.106 claudio 361:
362: protopr(kvmd, pcbaddr, tableid, proto);
363: exit(0);
1.1 deraadt 364: }
365:
366: /*
367: * Read kernel memory, return 0 on success.
368: */
369: int
1.53 jaredy 370: kread(u_long addr, void *buf, int size)
1.1 deraadt 371: {
372:
373: if (kvm_read(kvmd, addr, buf, size) != size) {
1.2 deraadt 374: (void)fprintf(stderr, "%s: %s\n", __progname,
1.1 deraadt 375: kvm_geterr(kvmd));
376: return (-1);
377: }
378: return (0);
379: }
380:
381: char *
1.77 claudio 382: plural(u_int64_t n)
1.1 deraadt 383: {
384: return (n != 1 ? "s" : "");
385: }
386:
387: char *
1.77 claudio 388: plurales(u_int64_t n)
1.1 deraadt 389: {
390: return (n != 1 ? "es" : "");
1.110 bluhm 391: }
392:
393: char *
394: pluralys(u_int64_t n)
395: {
396: return (n != 1 ? "ies" : "y");
1.1 deraadt 397: }
398:
399: /*
400: * Find the protox for the given "well-known" name.
401: */
402: static struct protox *
1.34 deraadt 403: knownname(char *name)
1.1 deraadt 404: {
405: struct protox **tpp, *tp;
406:
407: for (tpp = protoprotox; *tpp; tpp++)
408: for (tp = *tpp; tp->pr_name; tp++)
409: if (strcmp(tp->pr_name, name) == 0)
410: return (tp);
411: return (NULL);
412: }
413:
414: /*
415: * Find the protox corresponding to name.
416: */
417: static struct protox *
1.34 deraadt 418: name2protox(char *name)
1.1 deraadt 419: {
420: struct protox *tp;
421: char **alias; /* alias from p->aliases */
422: struct protoent *p;
423:
424: /*
425: * Try to find the name in the list of "well-known" names. If that
426: * fails, check if name is an alias for an Internet protocol.
427: */
1.11 millert 428: if ((tp = knownname(name)))
1.1 deraadt 429: return (tp);
430:
431: setprotoent(1); /* make protocol lookup cheaper */
1.11 millert 432: while ((p = getprotoent())) {
1.1 deraadt 433: /* assert: name not same as p->name */
434: for (alias = p->p_aliases; *alias; alias++)
435: if (strcmp(name, *alias) == 0) {
436: endprotoent();
437: return (knownname(p->p_name));
438: }
439: }
440: endprotoent();
441: return (NULL);
442: }
443:
444: static void
1.34 deraadt 445: usage(void)
1.1 deraadt 446: {
447: (void)fprintf(stderr,
1.112 benno 448: "usage: %s [-AaBln] [-f address_family] [-M core] [-N system]\n"
1.69 sobrado 449: " %s [-bdFgilmnqrstu] [-f address_family] [-M core] [-N system]\n"
450: " [-T tableid]\n"
1.94 tedu 451: " %s [-bdhn] [-c count] [-I interface] [-M core] [-N system] [-w wait]\n"
1.87 bluhm 452: " %s [-v] [-M core] [-N system] -P pcbaddr\n"
1.60 jaredy 453: " %s [-s] [-M core] [-N system] [-p protocol]\n"
454: " %s [-a] [-f address_family] [-i | -I interface]\n"
455: " %s [-W interface]\n",
456: __progname, __progname, __progname, __progname,
457: __progname, __progname, __progname);
1.1 deraadt 458: exit(1);
459: }
1.86 claudio 460:
461: u_int
462: gettable(const char *s)
463: {
464: const char *errstr;
465: struct rt_tableinfo info;
466: int mib[6];
467: size_t len;
468: u_int tableid;
469:
470: tableid = strtonum(s, 0, RT_TABLEID_MAX, &errstr);
471: if (errstr)
472: errx(1, "invalid table id: %s", errstr);
473:
474: mib[0] = CTL_NET;
1.101 guenther 475: mib[1] = PF_ROUTE;
1.86 claudio 476: mib[2] = 0;
477: mib[3] = 0;
478: mib[4] = NET_RT_TABLE;
479: mib[5] = tableid;
480:
481: len = sizeof(info);
482: if (sysctl(mib, 6, &info, &len, NULL, 0) == -1)
1.97 deraadt 483: err(1, "routing table %d", tableid);
1.86 claudio 484:
485: return (tableid);
486: }
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