Annotation of src/usr.bin/netstat/main.c, Revision 1.111
1.111 ! rzalamen 1: /* $OpenBSD: main.c,v 1.110 2016/07/20 19:57:54 bluhm 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 },
80: { esp_stats, "esp", 0 },
81: { ah_stats, "ah", 0 },
82: { etherip_stats,"etherip", 0 },
83: { ipcomp_stats, "ipcomp", 0 },
84: { carp_stats, "carp", 0 },
85: { pfsync_stats, "pfsync", 0 },
86: { div_stats, "divert", IPPROTO_DIVERT },
87: { pflow_stats, "pflow", 0 },
88: { NULL, NULL, 0 }
1.1 deraadt 89: };
90:
1.19 itojun 91: struct protox ip6protox[] = {
1.106 claudio 92: { ip6_stats, "ip6", IPPROTO_IPV6 },
93: { div6_stats, "divert6", IPPROTO_DIVERT },
94: { icmp6_stats, "icmp6", 0 },
95: { rip6_stats, "rip6", 0 },
96: { NULL, NULL, 0 }
1.19 itojun 97: };
98:
1.34 deraadt 99: struct protox *protoprotox[] = {
1.89 henning 100: protox, ip6protox, NULL
1.34 deraadt 101: };
1.1 deraadt 102:
1.30 millert 103: static void usage(void);
104: static struct protox *name2protox(char *);
105: static struct protox *knownname(char *);
1.86 claudio 106: u_int gettable(const char *);
107:
1.1 deraadt 108: kvm_t *kvmd;
109:
110: int
1.34 deraadt 111: main(int argc, char *argv[])
1.1 deraadt 112: {
113: extern char *optarg;
114: extern int optind;
1.68 claudio 115: const char *errstr;
1.28 mpech 116: struct protox *tp = NULL; /* for printing cblocks & stats */
1.1 deraadt 117: int ch;
1.59 markus 118: char *nlistf = NULL, *memf = NULL, *ep;
1.1 deraadt 119: char buf[_POSIX2_LINE_MAX];
1.59 markus 120: u_long pcbaddr = 0;
1.91 mikeb 121: u_int tableid;
1.86 claudio 122: int Tflag = 0;
1.82 tedu 123: int repeatcount = 0;
1.106 claudio 124: int proto = 0;
1.109 mpi 125: int need_nlist, kvm_flags = O_RDONLY;
1.95 deraadt 126:
1.1 deraadt 127: af = AF_UNSPEC;
1.91 mikeb 128: tableid = getrtable();
1.1 deraadt 129:
1.88 jsing 130: while ((ch = getopt(argc, argv,
1.93 tedu 131: "AaBbc:dFf:ghI:ilM:mN:np:P:qrsT:tuvW:w:")) != -1)
1.31 deraadt 132: switch (ch) {
1.1 deraadt 133: case 'A':
134: Aflag = 1;
135: break;
136: case 'a':
137: aflag = 1;
1.24 camield 138: break;
1.88 jsing 139: case 'B':
140: Bflag = 1;
141: break;
1.24 camield 142: case 'b':
143: bflag = 1;
1.1 deraadt 144: break;
1.82 tedu 145: case 'c':
146: repeatcount = strtonum(optarg, 1, INT_MAX, &errstr);
1.100 tedu 147: if (errstr)
148: errx(1, "count is %s", errstr);
1.82 tedu 149: break;
1.1 deraadt 150: case 'd':
151: dflag = 1;
1.64 pyr 152: break;
153: case 'F':
154: Fflag = 1;
1.1 deraadt 155: break;
156: case 'f':
1.4 mickey 157: if (strcmp(optarg, "inet") == 0)
1.1 deraadt 158: af = AF_INET;
1.19 itojun 159: else if (strcmp(optarg, "inet6") == 0)
160: af = AF_INET6;
1.7 kstailey 161: else if (strcmp(optarg, "local") == 0)
162: af = AF_LOCAL;
1.1 deraadt 163: else if (strcmp(optarg, "unix") == 0)
164: af = AF_UNIX;
1.75 claudio 165: else if (strcmp(optarg, "mpls") == 0)
166: af = AF_MPLS;
1.63 claudio 167: else if (strcmp(optarg, "mask") == 0)
168: af = 0xff;
1.1 deraadt 169: else {
170: (void)fprintf(stderr,
171: "%s: %s: unknown address family\n",
1.2 deraadt 172: __progname, optarg);
1.1 deraadt 173: exit(1);
174: }
175: break;
176: case 'g':
177: gflag = 1;
1.93 tedu 178: break;
179: case 'h':
180: hflag = 1;
1.1 deraadt 181: break;
1.2 deraadt 182: case 'I':
1.1 deraadt 183: iflag = 1;
1.2 deraadt 184: interface = optarg;
1.1 deraadt 185: break;
186: case 'i':
187: iflag = 1;
188: break;
1.19 itojun 189: case 'l':
190: lflag = 1;
191: break;
1.1 deraadt 192: case 'M':
193: memf = optarg;
194: break;
195: case 'm':
196: mflag = 1;
197: break;
198: case 'N':
199: nlistf = optarg;
200: break;
201: case 'n':
202: nflag = 1;
203: break;
204: case 'p':
205: if ((tp = name2protox(optarg)) == NULL) {
206: (void)fprintf(stderr,
1.42 jmc 207: "%s: %s: unknown protocol\n",
1.2 deraadt 208: __progname, optarg);
1.1 deraadt 209: exit(1);
210: }
211: pflag = 1;
1.27 brian 212: break;
1.59 markus 213: case 'P':
214: errno = 0;
215: pcbaddr = strtoul(optarg, &ep, 16);
216: if (optarg[0] == '\0' || *ep != '\0' ||
217: errno == ERANGE) {
218: (void)fprintf(stderr,
219: "%s: %s: invalid PCB address\n",
220: __progname, optarg);
221: exit(1);
222: }
223: Pflag = 1;
224: break;
1.27 brian 225: case 'q':
226: qflag = 1;
1.1 deraadt 227: break;
228: case 'r':
229: rflag = 1;
1.46 cedric 230: break;
1.1 deraadt 231: case 's':
232: ++sflag;
233: break;
1.68 claudio 234: case 'T':
1.86 claudio 235: Tflag = 1;
236: tableid = gettable(optarg);
1.68 claudio 237: break;
1.1 deraadt 238: case 't':
239: tflag = 1;
240: break;
241: case 'u':
242: af = AF_UNIX;
1.13 peter 243: break;
244: case 'v':
245: vflag = 1;
1.1 deraadt 246: break;
1.56 reyk 247: case 'W':
248: Wflag = 1;
249: interface = optarg;
250: break;
1.1 deraadt 251: case 'w':
1.100 tedu 252: interval = strtonum(optarg, 1, INT_MAX, &errstr);
253: if (errstr)
254: errx(1, "interval is %s", errstr);
1.1 deraadt 255: iflag = 1;
256: break;
257: case '?':
258: default:
259: usage();
260: }
261: argv += optind;
262: argc -= optind;
263:
1.108 tedu 264: if (argc) {
265: interval = strtonum(*argv, 1, INT_MAX, &errstr);
266: if (errstr)
267: errx(1, "interval is %s", errstr);
268: ++argv;
269: --argc;
270: iflag = 1;
1.84 lum 271: }
1.107 tedu 272: if (argc)
273: usage();
1.84 lum 274:
1.56 reyk 275: /*
1.106 claudio 276: * Show per-interface statistics which don't need access to
277: * kernel memory (they're using IOCTLs)
1.33 deraadt 278: */
1.106 claudio 279: if (Wflag) {
280: if (interface == NULL)
281: usage();
282: net80211_ifstats(interface);
283: exit(0);
1.33 deraadt 284: }
1.61 djm 285:
1.1 deraadt 286: if (mflag) {
1.70 deraadt 287: mbpr();
1.1 deraadt 288: exit(0);
289: }
290: if (iflag) {
1.82 tedu 291: intpr(interval, repeatcount);
1.1 deraadt 292: exit(0);
293: }
1.106 claudio 294: if (sflag) {
295: if (rflag) {
1.73 claudio 296: rt_stats();
1.106 claudio 297: } else if (gflag) {
1.19 itojun 298: if (af == AF_INET || af == AF_UNSPEC)
1.71 deraadt 299: mrt_stats();
1.19 itojun 300: if (af == AF_INET6 || af == AF_UNSPEC)
1.71 deraadt 301: mrt6_stats();
1.106 claudio 302: } else if (pflag && tp->pr_name) {
303: (*tp->pr_stats)(tp->pr_name);
1.70 deraadt 304: } else {
1.19 itojun 305: if (af == AF_INET || af == AF_UNSPEC)
1.106 claudio 306: for (tp = protox; tp->pr_name; tp++)
307: (*tp->pr_stats)(tp->pr_name);
1.19 itojun 308: if (af == AF_INET6 || af == AF_UNSPEC)
1.106 claudio 309: for (tp = ip6protox; tp->pr_name; tp++)
310: (*tp->pr_stats)(tp->pr_name);
1.19 itojun 311: }
1.1 deraadt 312: exit(0);
313: }
1.106 claudio 314: if (gflag) {
315: if (af == AF_INET || af == AF_UNSPEC)
316: mroutepr();
317: if (af == AF_INET6 || af == AF_UNSPEC)
318: mroute6pr();
319: exit(0);
320: }
321:
322: /*
323: * The remaining code may need kvm so lets try to open it.
324: * -r and -P are the only bits left that actually can use this.
325: */
1.109 mpi 326: need_nlist = (nlistf != NULL) || (memf != NULL) || (Aflag && rflag);
327: if (!need_nlist && !Pflag)
328: kvm_flags |= KVM_NO_FILES;
1.106 claudio 329:
1.109 mpi 330: if ((kvmd = kvm_openfiles(nlistf, memf, NULL, kvm_flags, buf)) == NULL)
1.106 claudio 331: errx(1, "kvm_openfiles: %s", buf);
332:
333: if (need_nlist && (kvm_nlist(kvmd, nl) < 0 || nl[0].n_type == 0)) {
334: if (nlistf)
335: errx(1, "%s: no namelist", nlistf);
336: else
337: errx(1, "no namelist");
1.76 gollo 338: }
1.106 claudio 339:
340: if (rflag) {
341: if (Aflag || nlistf != NULL || memf != NULL)
342: routepr(nl[N_RTREE].n_value, nl[N_RTMASK].n_value,
343: nl[N_AF2RTAFIDX].n_value, nl[N_RTBLIDMAX].n_value,
344: tableid);
345: else
346: p_rttables(af, tableid);
347: exit(0);
1.1 deraadt 348: }
349:
1.106 claudio 350: if (pflag) {
351: if (tp->pr_proto == 0)
352: errx(1, "no protocol handler for protocol %s",
353: tp->pr_name);
354: else
355: proto = tp->pr_proto;
1.1 deraadt 356: }
1.106 claudio 357:
358: protopr(kvmd, pcbaddr, tableid, proto);
359: exit(0);
1.1 deraadt 360: }
361:
362: /*
363: * Read kernel memory, return 0 on success.
364: */
365: int
1.53 jaredy 366: kread(u_long addr, void *buf, int size)
1.1 deraadt 367: {
368:
369: if (kvm_read(kvmd, addr, buf, size) != size) {
1.2 deraadt 370: (void)fprintf(stderr, "%s: %s\n", __progname,
1.1 deraadt 371: kvm_geterr(kvmd));
372: return (-1);
373: }
374: return (0);
375: }
376:
377: char *
1.77 claudio 378: plural(u_int64_t n)
1.1 deraadt 379: {
380: return (n != 1 ? "s" : "");
381: }
382:
383: char *
1.77 claudio 384: plurales(u_int64_t n)
1.1 deraadt 385: {
386: return (n != 1 ? "es" : "");
1.110 bluhm 387: }
388:
389: char *
390: pluralys(u_int64_t n)
391: {
392: return (n != 1 ? "ies" : "y");
1.1 deraadt 393: }
394:
395: /*
396: * Find the protox for the given "well-known" name.
397: */
398: static struct protox *
1.34 deraadt 399: knownname(char *name)
1.1 deraadt 400: {
401: struct protox **tpp, *tp;
402:
403: for (tpp = protoprotox; *tpp; tpp++)
404: for (tp = *tpp; tp->pr_name; tp++)
405: if (strcmp(tp->pr_name, name) == 0)
406: return (tp);
407: return (NULL);
408: }
409:
410: /*
411: * Find the protox corresponding to name.
412: */
413: static struct protox *
1.34 deraadt 414: name2protox(char *name)
1.1 deraadt 415: {
416: struct protox *tp;
417: char **alias; /* alias from p->aliases */
418: struct protoent *p;
419:
420: /*
421: * Try to find the name in the list of "well-known" names. If that
422: * fails, check if name is an alias for an Internet protocol.
423: */
1.11 millert 424: if ((tp = knownname(name)))
1.1 deraadt 425: return (tp);
426:
427: setprotoent(1); /* make protocol lookup cheaper */
1.11 millert 428: while ((p = getprotoent())) {
1.1 deraadt 429: /* assert: name not same as p->name */
430: for (alias = p->p_aliases; *alias; alias++)
431: if (strcmp(name, *alias) == 0) {
432: endprotoent();
433: return (knownname(p->p_name));
434: }
435: }
436: endprotoent();
437: return (NULL);
438: }
439:
440: static void
1.34 deraadt 441: usage(void)
1.1 deraadt 442: {
443: (void)fprintf(stderr,
1.88 jsing 444: "usage: %s [-AaBn] [-f address_family] [-M core] [-N system]\n"
1.69 sobrado 445: " %s [-bdFgilmnqrstu] [-f address_family] [-M core] [-N system]\n"
446: " [-T tableid]\n"
1.94 tedu 447: " %s [-bdhn] [-c count] [-I interface] [-M core] [-N system] [-w wait]\n"
1.87 bluhm 448: " %s [-v] [-M core] [-N system] -P pcbaddr\n"
1.60 jaredy 449: " %s [-s] [-M core] [-N system] [-p protocol]\n"
450: " %s [-a] [-f address_family] [-i | -I interface]\n"
451: " %s [-W interface]\n",
452: __progname, __progname, __progname, __progname,
453: __progname, __progname, __progname);
1.1 deraadt 454: exit(1);
455: }
1.86 claudio 456:
457: u_int
458: gettable(const char *s)
459: {
460: const char *errstr;
461: struct rt_tableinfo info;
462: int mib[6];
463: size_t len;
464: u_int tableid;
465:
466: tableid = strtonum(s, 0, RT_TABLEID_MAX, &errstr);
467: if (errstr)
468: errx(1, "invalid table id: %s", errstr);
469:
470: mib[0] = CTL_NET;
1.101 guenther 471: mib[1] = PF_ROUTE;
1.86 claudio 472: mib[2] = 0;
473: mib[3] = 0;
474: mib[4] = NET_RT_TABLE;
475: mib[5] = tableid;
476:
477: len = sizeof(info);
478: if (sysctl(mib, 6, &info, &len, NULL, 0) == -1)
1.97 deraadt 479: err(1, "routing table %d", tableid);
1.86 claudio 480:
481: return (tableid);
482: }
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