2 * Copyright (c) 1983, 1988, 1993
3 * Regents of the University of California. All rights reserved.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33 * @(#) Copyright (c) 1983, 1988, 1993 Regents of the University of California. All rights reserved.
34 * @(#)main.c 8.4 (Berkeley) 3/1/94
35 * $FreeBSD: src/usr.bin/netstat/main.c,v 1.34.2.12 2001/09/17 15:17:46 ru Exp $
36 * $DragonFly: src/usr.bin/netstat/main.c,v 1.14 2007/11/25 18:10:07 swildner Exp $
39 #include <sys/param.h>
41 #include <sys/protosw.h>
42 #include <sys/socket.h>
44 #include <netinet/in.h>
46 #include <netgraph/socket/ng_socket.h>
62 static struct nlist nl[] = {
103 #define N_MFCTABLE 20
105 #define N_VIFTABLE 21
121 #define N_ICMP6STAT 29
123 #define N_IPSECSTAT 30
125 #define N_IPSEC6STAT 31
127 #define N_PIM6STAT 32
129 #define N_MRT6PROTO 33
131 #define N_MRT6STAT 34
133 #define N_MF6CTABLE 35
135 #define N_MIF6TABLE 36
137 #define N_PFKEYSTAT 37
143 #define N_NMBCLUSTERS 40
151 #define N_CARPSTAT 44
157 u_char pr_index; /* index into nlist of cb head */
158 u_char pr_sindex; /* index into nlist of stat block */
159 u_char pr_wanted; /* 1 if wanted, 0 otherwise */
160 void (*pr_cblocks)(u_long, char *, int);
161 /* control blocks printing routine */
162 void (*pr_stats)(u_long, char *, int);
163 /* statistics printing routine */
164 void (*pr_istats)(char *); /* per/if statistics printing routine */
165 char *pr_name; /* well-known name */
166 int pr_usesysctl; /* true if we use sysctl, not kvm */
168 { -1, -1, 1, protopr,
169 tcp_stats, NULL, "tcp", IPPROTO_TCP },
170 { -1, -1, 1, protopr,
171 udp_stats, NULL, "udp", IPPROTO_UDP },
172 { -1, -1, 1, protopr,
173 NULL, NULL, "divert",IPPROTO_DIVERT },
174 { -1, -1, 1, protopr,
175 ip_stats, NULL, "ip", IPPROTO_RAW },
176 { -1, -1, 1, protopr,
177 icmp_stats, NULL, "icmp", IPPROTO_ICMP },
178 { -1, -1, 1, protopr,
179 igmp_stats, NULL, "igmp", IPPROTO_IGMP },
181 { -1, N_IPSECSTAT, 1, 0,
182 ipsec_stats, NULL, "ipsec", 0},
184 { -1, N_CARPSTAT, 1, 0,
185 carp_stats, NULL, "carp", 0},
191 struct protox ip6protox[] = {
192 { -1, -1, 1, protopr,
193 tcp_stats, NULL, "tcp", IPPROTO_TCP },
194 { -1, -1, 1, protopr,
195 udp_stats, NULL, "udp", IPPROTO_UDP },
196 { -1, N_IP6STAT, 1, protopr,
197 ip6_stats, ip6_ifstats, "ip6", IPPROTO_RAW },
198 { -1, N_ICMP6STAT, 1, protopr,
199 icmp6_stats, icmp6_ifstats, "icmp6",IPPROTO_ICMPV6 },
201 { -1, N_IPSEC6STAT, 1, 0,
202 ipsec_stats, NULL, "ipsec6",0 },
205 { -1, N_PIM6STAT, 1, 0,
206 pim6_stats, NULL, "pim6", 0 },
209 rip6_stats, NULL, "rip6", 0 },
210 { -1, -1, 1, protopr,
211 pim_stats, NULL, "pim", IPPROTO_PIM },
218 struct protox pfkeyprotox[] = {
219 { -1, N_PFKEYSTAT, 1, 0,
220 pfkey_stats, NULL, "pfkey", 0 },
226 struct protox atalkprotox[] = {
227 { N_DDPCB, N_DDPSTAT, 1, atalkprotopr,
228 ddp_stats, NULL, "ddp" },
233 struct protox netgraphprotox[] = {
234 { N_NGSOCKS, -1, 1, netgraphprotopr,
235 NULL, NULL, "ctrl" },
236 { N_NGSOCKS, -1, 1, netgraphprotopr,
237 NULL, NULL, "data" },
242 struct protox ipxprotox[] = {
243 { N_IPX, N_IPXSTAT, 1, ipxprotopr,
244 ipx_stats, NULL, "ipx", 0 },
245 { N_IPX, N_SPXSTAT, 1, ipxprotopr,
246 spx_stats, NULL, "spx", 0 },
252 struct protox nsprotox[] = {
253 { N_IDP, N_IDPSTAT, 1, nsprotopr,
254 idp_stats, NULL, "idp" },
255 { N_IDP, N_SPPSTAT, 1, nsprotopr,
256 spp_stats, NULL, "spp" },
258 nserr_stats, NULL, "ns_err" },
265 struct protox isoprotox[] = {
266 { ISO_TP, N_TPSTAT, 1, iso_protopr,
267 tp_stats, NULL, "tp" },
268 { N_CLTP, N_CLTPSTAT, 1, iso_protopr,
269 cltp_stats, NULL, "cltp" },
270 { -1, N_CLNPSTAT, 1, 0,
271 clnp_stats, NULL, "clnp"},
272 { -1, N_ESISSTAT, 1, 0,
273 esis_stats, NULL, "esis"},
279 struct protox *protoprotox[] = {
287 ipxprotox, atalkprotox,
296 static void printproto (struct protox *, char *);
297 static void usage (void);
298 static struct protox *name2protox (char *);
299 static struct protox *knownname (char *);
302 static char *nlistf = NULL, *memf = NULL;
304 int Aflag; /* show addresses of protocol control block */
305 int aflag; /* show all sockets (including servers) */
306 int bflag; /* show i/f total bytes in/out */
307 int cpuflag = -1; /* dump route table from specific cpu */
308 int dflag; /* show i/f dropped packets */
309 int gflag; /* show group (multicast) routing or stats */
310 int iflag; /* show interfaces */
311 int Lflag; /* show size of listen queues */
312 int mflag; /* show memory stats */
313 int Pflag; /* show more protocol info (go past 80 columns) */
314 int numeric_addr; /* show addresses numerically */
315 int numeric_port; /* show ports numerically */
316 static int pflag; /* show given protocol */
317 int rflag; /* show routing tables (or routing stats) */
318 int sflag; /* show protocol statistics */
319 int tflag; /* show i/f watchdog timers */
320 int Bflag; /* show buffer limit instead of buffer use */
321 int Wflag; /* wide display */
322 int zflag; /* zero stats */
324 int interval; /* repeat interval for i/f stats */
326 char *interface; /* desired i/f for stats, or NULL for all i/fs */
327 int unit; /* unit number for above */
329 int af; /* address family */
332 main(int argc, char **argv)
334 struct protox *tp = NULL; /* for printing cblocks & stats */
340 while ((ch = getopt(argc, argv, "Aabc:df:gI:iLlM:mN:nPp:rSsBtuWw:z")) != -1)
353 kread(nl[N_NCPUS].n_value, (char *)&n, sizeof(n));
354 cpuflag = strtol(optarg, NULL, 0);
355 if (cpuflag < 0 || cpuflag >= n)
356 errx(1, "cpu %d does not exist", cpuflag);
363 if (strcmp(optarg, "ns") == 0)
367 if (strcmp(optarg, "ipx") == 0)
369 else if (strcmp(optarg, "inet") == 0)
372 else if (strcmp(optarg, "inet6") == 0)
376 else if (strcmp(optarg, "pfkey") == 0)
379 else if (strcmp(optarg, "unix") == 0)
381 else if (strcmp(optarg, "atalk") == 0)
383 else if (strcmp(optarg, "ng") == 0
384 || strcmp(optarg, "netgraph") == 0)
387 else if (strcmp(optarg, "iso") == 0)
390 else if (strcmp(optarg, "link") == 0)
393 errx(1, "%s: unknown address family", optarg);
403 for (cp = interface = optarg; isalpha(*cp); cp++)
424 numeric_addr = numeric_port = 1;
430 if ((tp = name2protox(optarg)) == NULL) {
432 "%s: unknown or uninstrumented protocol",
460 interval = atoi(optarg);
473 #define BACKWARD_COMPATIBILITY
474 #ifdef BACKWARD_COMPATIBILITY
476 if (isdigit(**argv)) {
477 interval = atoi(*argv);
492 * Discard setgid privileges if not the running kernel so that bad
493 * guys can't print interesting stuff from kernel memory.
495 if (nlistf != NULL || memf != NULL)
500 if (kread(0, 0, 0) == 0)
501 mbpr(nl[N_MBSTAT].n_value,
502 nl[N_MBTYPES].n_value,
503 nl[N_NMBCLUSTERS].n_value,
504 nl[N_NMBUFS].n_value);
511 * Keep file descriptors open to avoid overhead
512 * of open/close on each call to get* routines.
518 * This does not make sense any more with DNS being default over
519 * the files. Doing a setXXXXent(1) causes a tcp connection to be
520 * used for the queries, which is slower.
523 if (iflag && !sflag) {
525 intpr(interval, nl[N_IFNET].n_value, NULL);
533 routepr(nl[N_RTREE].n_value);
539 if (af == AF_INET || af == AF_UNSPEC)
540 mrt_stats(nl[N_MRTSTAT].n_value);
542 if (af == AF_INET6 || af == AF_UNSPEC)
543 mrt6_stats(nl[N_MRT6STAT].n_value);
546 if (af == AF_INET || af == AF_UNSPEC)
547 mroutepr(nl[N_MFCTABLE].n_value,
548 nl[N_VIFTABLE].n_value);
550 if (af == AF_INET6 || af == AF_UNSPEC)
551 mroute6pr(nl[N_MF6CTABLE].n_value,
552 nl[N_MIF6TABLE].n_value);
560 printproto(tp, tp->pr_name);
563 if (af == AF_INET || af == AF_UNSPEC)
564 for (tp = protox; tp->pr_name; tp++)
565 printproto(tp, tp->pr_name);
567 if (af == AF_INET6 || af == AF_UNSPEC)
568 for (tp = ip6protox; tp->pr_name; tp++)
569 printproto(tp, tp->pr_name);
572 if (af == PF_KEY || af == AF_UNSPEC)
573 for (tp = pfkeyprotox; tp->pr_name; tp++)
574 printproto(tp, tp->pr_name);
576 if (af == AF_IPX || af == AF_UNSPEC) {
578 for (tp = ipxprotox; tp->pr_name; tp++)
579 printproto(tp, tp->pr_name);
581 if (af == AF_APPLETALK || af == AF_UNSPEC)
582 for (tp = atalkprotox; tp->pr_name; tp++)
583 printproto(tp, tp->pr_name);
584 if (af == AF_NETGRAPH || af == AF_UNSPEC)
585 for (tp = netgraphprotox; tp->pr_name; tp++)
586 printproto(tp, tp->pr_name);
588 if (af == AF_NS || af == AF_UNSPEC)
589 for (tp = nsprotox; tp->pr_name; tp++)
590 printproto(tp, tp->pr_name);
593 if (af == AF_ISO || af == AF_UNSPEC)
594 for (tp = isoprotox; tp->pr_name; tp++)
595 printproto(tp, tp->pr_name);
597 if ((af == AF_UNIX || af == AF_UNSPEC) && !Lflag && !sflag)
603 * Print out protocol statistics or control blocks (per sflag).
604 * If the interface was not specifically requested, and the symbol
605 * is not in the namelist, ignore this one.
608 printproto(struct protox *tp, char *name)
610 void (*pr)(u_long, char *, int);
616 intpr(interval, nl[N_IFNET].n_value,
619 printf("%s: no per-interface stats routine\n",
627 printf("%s: no stats routine\n",
631 off = tp->pr_usesysctl ? tp->pr_usesysctl
632 : nl[tp->pr_sindex].n_value;
638 printf("%s: no PCB routine\n", tp->pr_name);
641 off = tp->pr_usesysctl ? tp->pr_usesysctl
642 : nl[tp->pr_index].n_value;
644 if (pr != NULL && (off || af != AF_UNSPEC))
645 (*pr)(off, name, af);
649 * Read kernel memory, return 0 on success.
652 kread(u_long addr, char *buf, int size)
658 kvmd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, buf);
660 if (kvm_nlist(kvmd, nl) < 0) {
662 errx(1, "%s: kvm_nlist: %s", nlistf,
665 errx(1, "kvm_nlist: %s", kvm_geterr(kvmd));
668 if (nl[0].n_type == 0) {
670 errx(1, "%s: no namelist", nlistf);
672 errx(1, "no namelist");
675 warnx("kvm not available");
681 if (kvm_read(kvmd, addr, buf, size) != size) {
682 warnx("%s", kvm_geterr(kvmd));
691 return (n != 1 ? "s" : "");
697 return (n != 1 ? "es" : "");
701 * Find the protox for the given "well-known" name.
703 static struct protox *
704 knownname(char *name)
706 struct protox **tpp, *tp;
708 for (tpp = protoprotox; *tpp; tpp++)
709 for (tp = *tpp; tp->pr_name; tp++)
710 if (strcmp(tp->pr_name, name) == 0)
716 * Find the protox corresponding to name.
718 static struct protox *
719 name2protox(char *name)
722 char **alias; /* alias from p->aliases */
726 * Try to find the name in the list of "well-known" names. If that
727 * fails, check if name is an alias for an Internet protocol.
729 if ((tp = knownname(name)) != NULL)
732 setprotoent(1); /* make protocol lookup cheaper */
733 while ((p = getprotoent()) != NULL) {
734 /* assert: name not same as p->name */
735 for (alias = p->p_aliases; *alias; alias++)
736 if (strcmp(name, *alias) == 0) {
738 return (knownname(p->p_name));
748 (void)fprintf(stderr, "%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n",
749 "usage: netstat [-AaLnSW] [-c cpu] [-f protocol_family | -p protocol]\n"
750 " [-M core] [-N system]",
751 " netstat -i | -I interface [-abdnt] [-f address_family]\n"
752 " [-M core] [-N system]",
753 " netstat -w wait [-I interface] [-d] [-M core] [-N system]",
754 " netstat -s [-s] [-z] [-f protocol_family | -p protocol] [-M core]",
755 " netstat -i | -I interface -s [-f protocol_family | -p protocol]\n"
756 " [-M core] [-N system]",
757 " netstat -m [-M core] [-N system]",
758 " netstat -r [-AanW] [-f address_family] [-M core] [-N system]",
759 " netstat -rs [-s] [-M core] [-N system]",
760 " netstat -g [-W] [-f address_family] [-M core] [-N system]",
761 " netstat -gs [-s] [-f address_family] [-M core] [-N system]");