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. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * @(#) Copyright (c) 1983, 1988, 1993 Regents of the University of California. All rights reserved.
30 * @(#)main.c 8.4 (Berkeley) 3/1/94
31 * $FreeBSD: src/usr.bin/netstat/main.c,v 1.34.2.12 2001/09/17 15:17:46 ru Exp $
34 #include <sys/param.h>
36 #include <sys/protosw.h>
37 #include <sys/socket.h>
39 #include <netinet/in.h>
41 #include <netgraph/socket/ng_socket.h>
57 static struct nlist nl[] = {
59 { .n_name = "_ifnet" },
61 { .n_name = "_imp_softc" },
63 { .n_name = "_rtstat" },
65 { .n_name = "_localsw" },
67 { .n_name = "_nspcb"},
69 { .n_name = "_idpstat"},
71 { .n_name = "_spp_istat"},
73 { .n_name = "_ns_errstat"},
75 { .n_name = "_clnp_stat"},
77 { .n_name = "_tp_inpcb" },
79 { .n_name = "_tp_refinfo" },
81 { .n_name = "_tp_stat" },
83 { .n_name = "_esis_stat"},
87 { .n_name = "_rt_tables"},
91 { .n_name = "_cltpstat"},
93 { .n_name = "_nfile" },
95 { .n_name = "_file" },
97 { .n_name = "_mrtstat" },
99 { .n_name = "_mfctable" },
100 #define N_VIFTABLE 21
101 { .n_name = "_viftable" },
103 { .n_name = "_ngsocklist"},
105 { .n_name = "_ip6stat" },
106 #define N_ICMP6STAT 24
107 { .n_name = "_icmp6stat" },
108 #define N_IPSECSTAT 25
109 { .n_name = "_ipsecstat" },
110 #define N_IPSEC6STAT 26
111 { .n_name = "_ipsec6stat" },
112 #define N_PIM6STAT 27
113 { .n_name = "_pim6stat" },
114 #define N_MRT6PROTO 28
115 { .n_name = "_ip6_mrtproto" },
116 #define N_MRT6STAT 29
117 { .n_name = "_mrt6stat" },
118 #define N_MF6CTABLE 30
119 { .n_name = "_mf6ctable" },
120 #define N_MIF6TABLE 31
121 { .n_name = "_mif6table" },
122 #define N_PFKEYSTAT 32
123 { .n_name = "_pfkeystat" },
125 { .n_name = "_mbstat" },
127 { .n_name = "_mbtypes" },
128 #define N_NMBCLUSTERS 35
129 { .n_name = "_nmbclusters" },
131 { .n_name = "_nmbufs" },
133 { .n_name = "_rttrash" },
135 { .n_name = "_ncpus" },
136 #define N_CARPSTAT 39
137 { .n_name = "_carpstats" },
138 #define N_NMBJCLUSTERS 40
139 { .n_name = "_nmbjclusters" },
144 u_char pr_index; /* index into nlist of cb head */
145 u_char pr_sindex; /* index into nlist of stat block */
146 u_char pr_wanted; /* 1 if wanted, 0 otherwise */
147 void (*pr_cblocks)(u_long, const char *, int);
148 /* control blocks printing routine */
149 void (*pr_stats)(u_long, const char *, int);
150 /* statistics printing routine */
151 void (*pr_istats)(char *); /* per/if statistics printing routine */
152 const char *pr_name; /* well-known name */
153 u_int pr_usesysctl; /* true if we use sysctl, not kvm */
155 { -1, -1, 1, protopr,
156 tcp_stats, NULL, "tcp", IPPROTO_TCP },
157 { -1, -1, 1, protopr,
158 udp_stats, NULL, "udp", IPPROTO_UDP },
159 { -1, -1, 1, protopr,
160 NULL, NULL, "divert",IPPROTO_DIVERT },
161 { -1, -1, 1, protopr,
162 ip_stats, NULL, "ip", IPPROTO_RAW },
163 { -1, -1, 1, protopr,
164 icmp_stats, NULL, "icmp", IPPROTO_ICMP },
165 { -1, -1, 1, protopr,
166 igmp_stats, NULL, "igmp", IPPROTO_IGMP },
168 { -1, N_IPSECSTAT, 1, 0,
169 ipsec_stats, NULL, "ipsec", 0},
171 { -1, N_CARPSTAT, 1, 0,
172 carp_stats, NULL, "carp", 0},
178 struct protox ip6protox[] = {
179 { -1, -1, 1, protopr,
180 tcp_stats, NULL, "tcp", IPPROTO_TCP },
181 { -1, -1, 1, protopr,
182 udp_stats, NULL, "udp", IPPROTO_UDP },
183 { -1, N_IP6STAT, 1, protopr,
184 ip6_stats, ip6_ifstats, "ip6", IPPROTO_RAW },
185 { -1, N_ICMP6STAT, 1, protopr,
186 icmp6_stats, icmp6_ifstats, "icmp6",IPPROTO_ICMPV6 },
188 { -1, N_IPSEC6STAT, 1, 0,
189 ipsec_stats, NULL, "ipsec6",0 },
192 { -1, N_PIM6STAT, 1, 0,
193 pim6_stats, NULL, "pim6", 0 },
196 rip6_stats, NULL, "rip6", 0 },
197 { -1, -1, 1, protopr,
198 pim_stats, NULL, "pim", IPPROTO_PIM },
205 struct protox pfkeyprotox[] = {
206 { -1, N_PFKEYSTAT, 1, 0,
207 pfkey_stats, NULL, "pfkey", 0 },
213 struct protox netgraphprotox[] = {
214 { N_NGSOCKS, -1, 1, netgraphprotopr,
215 NULL, NULL, "ctrl", 0 },
216 { N_NGSOCKS, -1, 1, netgraphprotopr,
217 NULL, NULL, "data", 0 },
222 struct protox *protoprotox[] = {
232 static void printproto (struct protox *, const char *, u_long);
233 static void usage (void);
234 static struct protox *name2protox (char *);
235 static struct protox *knownname (char *);
238 static char *nlistf = NULL, *memf = NULL;
240 int Aflag; /* show addresses of protocol control block */
241 int aflag; /* show all sockets (including servers) */
242 int bflag; /* show i/f total bytes in/out */
243 int cpuflag = -1; /* dump route table from specific cpu */
244 int dflag; /* show i/f dropped packets */
245 int gflag; /* show group (multicast) routing or stats */
246 int hflag; /* show counters in human readable format */
247 int iflag; /* show interfaces */
248 int Lflag; /* show size of listen queues */
249 int mflag; /* show memory stats */
250 int Pflag; /* show more protocol info (go past 80 columns) */
251 int numeric_addr; /* show addresses numerically */
252 int numeric_port; /* show ports numerically */
253 static int pflag; /* show given protocol */
254 int rflag; /* show routing tables (or routing stats) */
255 int sflag; /* show protocol statistics */
256 int tflag; /* show i/f watchdog timers */
257 int Bflag; /* show buffer limit instead of buffer use */
258 int Wflag; /* wide display */
259 int zflag; /* zero stats */
261 int interval; /* repeat interval for i/f stats */
263 char *interface; /* desired i/f for stats, or NULL for all i/fs */
264 int unit; /* unit number for above */
266 int af; /* address family */
269 main(int argc, char **argv)
271 struct protox *tp = NULL; /* for printing cblocks & stats */
277 while ((ch = getopt(argc, argv, "Aabc:df:ghI:iLlM:mN:nPp:rSsBtuWw:z")) != -1)
290 kread(nl[N_NCPUS].n_value, (char *)&n, sizeof(n));
291 cpuflag = strtol(optarg, NULL, 0);
292 if (cpuflag < 0 || cpuflag >= n)
293 errx(1, "cpu %d does not exist", cpuflag);
299 if (strcmp(optarg, "inet") == 0)
302 else if (strcmp(optarg, "inet6") == 0)
306 else if (strcmp(optarg, "pfkey") == 0)
309 else if (strcmp(optarg, "unix") == 0)
311 else if (strcmp(optarg, "ng") == 0
312 || strcmp(optarg, "netgraph") == 0)
314 else if (strcmp(optarg, "link") == 0)
316 else if (strcmp(optarg, "mpls") == 0)
319 errx(1, "%s: unknown address family", optarg);
332 for (cp = interface = optarg; isalpha(*cp); cp++)
353 numeric_addr = numeric_port = 1;
359 if ((tp = name2protox(optarg)) == NULL) {
361 "%s: unknown or uninstrumented protocol",
389 interval = atoi(optarg);
402 #define BACKWARD_COMPATIBILITY
403 #ifdef BACKWARD_COMPATIBILITY
405 if (isdigit(**argv)) {
406 interval = atoi(*argv);
421 * Discard setgid privileges if not the running kernel so that bad
422 * guys can't print interesting stuff from kernel memory.
424 if (nlistf != NULL || memf != NULL)
429 if (kread(0, 0, 0) == 0)
430 mbpr(nl[N_MBSTAT].n_value,
431 nl[N_MBTYPES].n_value,
432 nl[N_NMBCLUSTERS].n_value,
433 nl[N_NMBJCLUSTERS].n_value,
434 nl[N_NMBUFS].n_value,
435 nl[N_NCPUS].n_value);
437 mbpr(0, 0, 0, 0, 0, 0);
443 * Keep file descriptors open to avoid overhead
444 * of open/close on each call to get* routines.
450 * This does not make sense any more with DNS being default over
451 * the files. Doing a setXXXXent(1) causes a tcp connection to be
452 * used for the queries, which is slower.
455 if (iflag && !sflag) {
457 intpr(interval, nl[N_IFNET].n_value, NULL, nl[N_NCPUS].n_value);
465 routepr(nl[N_RTREE].n_value);
471 if (af == AF_INET || af == AF_UNSPEC)
472 mrt_stats(nl[N_MRTSTAT].n_value);
474 if (af == AF_INET6 || af == AF_UNSPEC)
475 mrt6_stats(nl[N_MRT6STAT].n_value);
478 if (af == AF_INET || af == AF_UNSPEC)
479 mroutepr(nl[N_MFCTABLE].n_value,
480 nl[N_VIFTABLE].n_value);
482 if (af == AF_INET6 || af == AF_UNSPEC)
483 mroute6pr(nl[N_MF6CTABLE].n_value,
484 nl[N_MIF6TABLE].n_value);
492 printproto(tp, tp->pr_name, nl[N_NCPUS].n_value);
495 if (af == AF_INET || af == AF_UNSPEC)
496 for (tp = protox; tp->pr_name; tp++)
497 printproto(tp, tp->pr_name, nl[N_NCPUS].n_value);
499 if (af == AF_INET6 || af == AF_UNSPEC)
500 for (tp = ip6protox; tp->pr_name; tp++)
501 printproto(tp, tp->pr_name, nl[N_NCPUS].n_value);
504 if (af == PF_KEY || af == AF_UNSPEC)
505 for (tp = pfkeyprotox; tp->pr_name; tp++)
506 printproto(tp, tp->pr_name, nl[N_NCPUS].n_value);
508 if (af == AF_NETGRAPH || af == AF_UNSPEC)
509 for (tp = netgraphprotox; tp->pr_name; tp++)
510 printproto(tp, tp->pr_name, nl[N_NCPUS].n_value);
511 if ((af == AF_UNIX || af == AF_UNSPEC) && !Lflag && !sflag)
517 * Print out protocol statistics or control blocks (per sflag).
518 * If the interface was not specifically requested, and the symbol
519 * is not in the namelist, ignore this one.
522 printproto(struct protox *tp, const char *name, u_long ncpusaddr)
524 void (*pr)(u_long, const char *, int);
530 intpr(interval, nl[N_IFNET].n_value,
531 tp->pr_istats, ncpusaddr);
533 printf("%s: no per-interface stats routine\n",
541 printf("%s: no stats routine\n",
545 off = tp->pr_usesysctl ? tp->pr_usesysctl
546 : nl[tp->pr_sindex].n_value;
552 printf("%s: no PCB routine\n", tp->pr_name);
555 off = tp->pr_usesysctl ? tp->pr_usesysctl
556 : nl[tp->pr_index].n_value;
558 if (pr != NULL && (off || af != AF_UNSPEC))
559 (*pr)(off, name, af);
563 * Read kernel memory, return 0 on success.
566 kread(u_long addr, char *buf, int size)
572 kvmd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, buf);
574 if (kvm_nlist(kvmd, nl) < 0) {
576 errx(1, "%s: kvm_nlist: %s", nlistf,
579 errx(1, "kvm_nlist: %s", kvm_geterr(kvmd));
582 if (nl[0].n_type == 0) {
584 errx(1, "%s: no namelist", nlistf);
586 errx(1, "no namelist");
589 warnx("kvm not available");
595 if (kvm_read(kvmd, addr, buf, size) != size) {
596 warnx("%s", kvm_geterr(kvmd));
605 return (n != 1 ? "s" : "");
611 return (n != 1 ? "es" : "");
615 * Find the protox for the given "well-known" name.
617 static struct protox *
618 knownname(char *name)
620 struct protox **tpp, *tp;
622 for (tpp = protoprotox; *tpp; tpp++)
623 for (tp = *tpp; tp->pr_name; tp++)
624 if (strcmp(tp->pr_name, name) == 0)
630 * Find the protox corresponding to name.
632 static struct protox *
633 name2protox(char *name)
636 char **alias; /* alias from p->aliases */
640 * Try to find the name in the list of "well-known" names. If that
641 * fails, check if name is an alias for an Internet protocol.
643 if ((tp = knownname(name)) != NULL)
646 setprotoent(1); /* make protocol lookup cheaper */
647 while ((p = getprotoent()) != NULL) {
648 /* assert: name not same as p->name */
649 for (alias = p->p_aliases; *alias; alias++)
650 if (strcmp(name, *alias) == 0) {
652 return (knownname(p->p_name));
662 (void)fprintf(stderr, "%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n",
663 "usage: netstat [-AaLnPSW] [-c cpu] [-f protocol_family | -p protocol]\n"
664 " [-M core] [-N system]",
665 " netstat -i | -I interface [-aBbdhnt] [-f address_family]\n"
666 " [-M core] [-N system]",
667 " netstat -w wait [-I interface] [-dh] [-M core] [-N system]",
668 " netstat -s [-s] [-z] [-f protocol_family | -p protocol] [-M core]",
669 " netstat -i | -I interface -s [-f protocol_family | -p protocol]\n"
670 " [-M core] [-N system]",
671 " netstat -m [-M core] [-N system]",
672 " netstat -r [-AanW] [-f address_family] [-M core] [-N system]",
673 " netstat -rs [-s] [-M core] [-N system]",
674 " netstat -g [-W] [-f address_family] [-M core] [-N system]",
675 " netstat -gs [-s] [-f address_family] [-M core] [-N system]");