File: [local] / src / usr.bin / netstat / main.c (download)
Revision 1.58, Wed Jun 8 04:47:04 2005 UTC (19 years ago) by henning
Branch: MAIN
Changes since 1.57: +37 -61 lines
bye bye, Xerox NS protocols
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/* $OpenBSD: main.c,v 1.58 2005/06/08 04:47:04 henning Exp $ */
/* $NetBSD: main.c,v 1.9 1996/05/07 02:55:02 thorpej Exp $ */
/*
* Copyright (c) 1983, 1988, 1993
* Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef lint
char copyright[] =
"@(#) Copyright (c) 1983, 1988, 1993\n\
Regents of the University of California. All rights reserved.\n";
#endif /* not lint */
#ifndef lint
#if 0
static char sccsid[] = "from: @(#)main.c 8.4 (Berkeley) 3/1/94";
#else
static char *rcsid = "$OpenBSD: main.c,v 1.58 2005/06/08 04:47:04 henning Exp $";
#endif
#endif /* not lint */
#include <sys/param.h>
#include <sys/file.h>
#include <sys/protosw.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <ctype.h>
#include <errno.h>
#include <kvm.h>
#include <limits.h>
#include <netdb.h>
#include <nlist.h>
#include <paths.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "netstat.h"
struct nlist nl[] = {
#define N_MBSTAT 0
{ "_mbstat" },
#define N_IPSTAT 1
{ "_ipstat" },
#define N_TCBTABLE 2
{ "_tcbtable" },
#define N_TCPSTAT 3
{ "_tcpstat" },
#define N_UDBTABLE 4
{ "_udbtable" },
#define N_UDPSTAT 5
{ "_udpstat" },
#define N_IFNET 6
{ "_ifnet" },
#define N_ICMPSTAT 7
{ "_icmpstat" },
#define N_RTSTAT 8
{ "_rtstat" },
#define N_UNIXSW 9
{ "_unixsw" },
#define N_RTREE 10
{ "_rt_tables"},
#define N_FILE 11
{ "_file" },
#define N_IGMPSTAT 12
{ "_igmpstat" },
#define N_MRTPROTO 13
{ "_ip_mrtproto" },
#define N_MRTSTAT 14
{ "_mrtstat" },
#define N_MFCHASHTBL 15
{ "_mfchashtbl" },
#define N_MFCHASH 16
{ "_mfchash" },
#define N_VIFTABLE 17
{ "_viftable" },
#define N_IPX 18
{ "_ipxcbtable"},
#define N_IPXSTAT 19
{ "_ipxstat"},
#define N_SPXSTAT 20
{ "_spx_istat"},
#define N_AHSTAT 21
{ "_ahstat"},
#define N_ESPSTAT 22
{ "_espstat"},
#define N_IP4STAT 23
{ "_ipipstat"},
#define N_DDPSTAT 24
{ "_ddpstat"},
#define N_DDPCB 25
{ "_ddpcb"},
#define N_ETHERIPSTAT 26
{ "_etheripstat"},
#define N_IP6STAT 27
{ "_ip6stat" },
#define N_ICMP6STAT 28
{ "_icmp6stat" },
#define N_PIM6STAT 29
{ "_pim6stat" },
#define N_MRT6PROTO 30
{ "_ip6_mrtproto" },
#define N_MRT6STAT 31
{ "_mrt6stat" },
#define N_MF6CTABLE 32
{ "_mf6ctable" },
#define N_MIF6TABLE 33
{ "_mif6table" },
#define N_MBPOOL 34
{ "_mbpool" },
#define N_MCLPOOL 35
{ "_mclpool" },
#define N_IPCOMPSTAT 36
{ "_ipcompstat" },
#define N_RIP6STAT 37
{ "_rip6stat" },
#define N_CARPSTAT 38
{ "_carpstats" },
#define N_RAWIPTABLE 39
{ "_rawcbtable" },
#define N_RAWIP6TABLE 40
{ "_rawin6pcbtable" },
#define N_PFSYNCSTAT 41
{ "_pfsyncstats" },
#define N_PIMSTAT 42
{ "_pimstat" },
{ ""}
};
struct protox {
u_char pr_index; /* index into nlist of cb head */
u_char pr_sindex; /* index into nlist of stat block */
u_char pr_wanted; /* 1 if wanted, 0 otherwise */
void (*pr_cblocks)(u_long, char *); /* control blocks printing routine */
void (*pr_stats)(u_long, char *); /* statistics printing routine */
char *pr_name; /* well-known name */
} protox[] = {
{ N_TCBTABLE, N_TCPSTAT, 1, protopr,
tcp_stats, "tcp" },
{ N_UDBTABLE, N_UDPSTAT, 1, protopr,
udp_stats, "udp" },
{ N_RAWIPTABLE, N_IPSTAT, 1, protopr,
ip_stats, "ip" },
{ -1, N_ICMPSTAT, 1, 0,
icmp_stats, "icmp" },
{ -1, N_IGMPSTAT, 1, 0,
igmp_stats, "igmp" },
{ -1, N_AHSTAT, 1, 0,
ah_stats, "ah" },
{ -1, N_ESPSTAT, 1, 0,
esp_stats, "esp" },
{ -1, N_IP4STAT, 1, 0,
ipip_stats, "ipencap" },
{ -1, N_ETHERIPSTAT, 1, 0,
etherip_stats,"etherip" },
{ -1, N_IPCOMPSTAT, 1, 0,
ipcomp_stats, "ipcomp" },
{ -1, N_CARPSTAT, 1, 0,
carp_stats, "carp" },
{ -1, N_PFSYNCSTAT, 1, 0,
pfsync_stats, "pfsync" },
{ -1, N_PIMSTAT, 1, 0,
pim_stats, "pim" },
{ -1, -1, 0, 0,
0, 0 }
};
#ifdef INET6
struct protox ip6protox[] = {
{ N_TCBTABLE, N_TCPSTAT, 1, ip6protopr,
0, "tcp" },
{ N_UDBTABLE, N_UDPSTAT, 1, ip6protopr,
0, "udp" },
{ N_RAWIP6TABLE,N_IP6STAT, 1, ip6protopr,
ip6_stats, "ip6" },
{ -1, N_ICMP6STAT, 1, 0,
icmp6_stats, "icmp6" },
{ -1, N_PIM6STAT, 1, 0,
pim6_stats, "pim6" },
{ -1, N_RIP6STAT, 1, 0,
rip6_stats, "rip6" },
{ -1, -1, 0, 0,
0, 0 }
};
#endif
struct protox ipxprotox[] = {
{ N_IPX, N_IPXSTAT, 1, ipxprotopr,
ipx_stats, "ipx" },
{ N_IPX, N_SPXSTAT, 1, ipxprotopr,
spx_stats, "spx" },
{ -1, -1, 0, 0,
0, 0 }
};
struct protox atalkprotox[] = {
{ N_DDPCB, N_DDPSTAT, 1, atalkprotopr,
ddp_stats, "ddp" },
{ -1, -1, 0, 0,
0, 0 }
};
#ifndef INET6
struct protox *protoprotox[] = {
protox, ipxprotox, atalkprotox, NULL
};
#else
struct protox *protoprotox[] = {
protox, ip6protox, ipxprotox, atalkprotox, NULL
};
#endif
static void printproto(struct protox *, char *);
static void usage(void);
static struct protox *name2protox(char *);
static struct protox *knownname(char *);
kvm_t *kvmd;
int
main(int argc, char *argv[])
{
extern char *optarg;
extern int optind;
struct protoent *p;
struct protox *tp = NULL; /* for printing cblocks & stats */
int ch;
char *nlistf = NULL, *memf = NULL;
char buf[_POSIX2_LINE_MAX];
af = AF_UNSPEC;
while ((ch = getopt(argc, argv, "Aabdf:gI:ilM:mN:np:qrstuvW:w:")) != -1)
switch (ch) {
case 'A':
Aflag = 1;
break;
case 'a':
aflag = 1;
break;
case 'b':
bflag = 1;
break;
case 'd':
dflag = 1;
break;
case 'f':
if (strcmp(optarg, "inet") == 0)
af = AF_INET;
else if (strcmp(optarg, "inet6") == 0)
af = AF_INET6;
else if (strcmp(optarg, "local") == 0)
af = AF_LOCAL;
else if (strcmp(optarg, "unix") == 0)
af = AF_UNIX;
else if (strcmp(optarg, "ipx") == 0)
af = AF_IPX;
else if (strcmp(optarg, "encap") == 0)
af = PF_KEY;
else if (strcmp(optarg, "atalk") == 0)
af = AF_APPLETALK;
else {
(void)fprintf(stderr,
"%s: %s: unknown address family\n",
__progname, optarg);
exit(1);
}
break;
case 'g':
gflag = 1;
break;
case 'I':
iflag = 1;
interface = optarg;
break;
case 'i':
iflag = 1;
break;
case 'l':
lflag = 1;
break;
case 'M':
memf = optarg;
break;
case 'm':
mflag = 1;
break;
case 'N':
nlistf = optarg;
break;
case 'n':
nflag = 1;
break;
case 'p':
if ((tp = name2protox(optarg)) == NULL) {
(void)fprintf(stderr,
"%s: %s: unknown protocol\n",
__progname, optarg);
exit(1);
}
pflag = 1;
break;
case 'q':
qflag = 1;
break;
case 'r':
rflag = 1;
break;
case 's':
++sflag;
break;
case 't':
tflag = 1;
break;
case 'u':
af = AF_UNIX;
break;
case 'v':
vflag = 1;
break;
case 'W':
Wflag = 1;
interface = optarg;
break;
case 'w':
interval = atoi(optarg);
iflag = 1;
break;
case '?':
default:
usage();
}
argv += optind;
argc -= optind;
/*
* Show per-interface statistics which don't need access to
* kernel memory (they're using IOCTLs)
*/
if (Wflag) {
if (interface == NULL)
usage();
net80211_ifstats(interface);
exit(0);
}
/*
* Discard setgid privileges if not the running kernel so that bad
* guys can't print interesting stuff from kernel memory.
*/
if (nlistf != NULL || memf != NULL) {
setegid(getgid());
setgid(getgid());
}
if ((kvmd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY,
buf)) == NULL) {
fprintf(stderr, "%s: kvm_open: %s\n", __progname, buf);
exit(1);
}
setegid(getgid());
setgid(getgid());
#define BACKWARD_COMPATIBILITY
#ifdef BACKWARD_COMPATIBILITY
if (*argv) {
if (isdigit(**argv)) {
interval = atoi(*argv);
if (interval <= 0)
usage();
++argv;
iflag = 1;
}
if (*argv) {
nlistf = *argv;
if (*++argv)
memf = *argv;
}
}
#endif
if (kvm_nlist(kvmd, nl) < 0 || nl[0].n_type == 0) {
if (nlistf)
fprintf(stderr, "%s: %s: no namelist\n", __progname,
nlistf);
else
fprintf(stderr, "%s: no namelist\n", __progname);
exit(1);
}
if (mflag) {
mbpr(nl[N_MBSTAT].n_value, nl[N_MBPOOL].n_value,
nl[N_MCLPOOL].n_value);
exit(0);
}
if (pflag) {
printproto(tp, tp->pr_name);
exit(0);
}
/*
* Keep file descriptors open to avoid overhead
* of open/close on each call to get* routines.
*/
sethostent(1);
setnetent(1);
if (iflag) {
intpr(interval, nl[N_IFNET].n_value);
exit(0);
}
if (rflag) {
if (sflag)
rt_stats(nl[N_RTSTAT].n_value);
else
routepr(nl[N_RTREE].n_value);
exit(0);
}
if (gflag) {
if (sflag) {
if (af == AF_INET || af == AF_UNSPEC)
mrt_stats(nl[N_MRTPROTO].n_value,
nl[N_MRTSTAT].n_value);
#ifdef INET6
if (af == AF_INET6 || af == AF_UNSPEC)
mrt6_stats(nl[N_MRT6PROTO].n_value,
nl[N_MRT6STAT].n_value);
#endif
}
else {
if (af == AF_INET || af == AF_UNSPEC)
mroutepr(nl[N_MRTPROTO].n_value,
nl[N_MFCHASHTBL].n_value,
nl[N_MFCHASH].n_value,
nl[N_VIFTABLE].n_value);
#ifdef INET6
if (af == AF_INET6 || af == AF_UNSPEC)
mroute6pr(nl[N_MRT6PROTO].n_value,
nl[N_MF6CTABLE].n_value,
nl[N_MIF6TABLE].n_value);
#endif
}
exit(0);
}
if (af == AF_INET || af == AF_UNSPEC) {
setprotoent(1);
setservent(1);
/* ugh, this is O(MN) ... why do we do this? */
while ((p = getprotoent())) {
for (tp = protox; tp->pr_name; tp++)
if (strcmp(tp->pr_name, p->p_name) == 0)
break;
if (tp->pr_name == 0 || tp->pr_wanted == 0)
continue;
printproto(tp, p->p_name);
}
endprotoent();
}
#ifdef INET6
if (af == AF_INET6 || af == AF_UNSPEC)
for (tp = ip6protox; tp->pr_name; tp++)
printproto(tp, tp->pr_name);
#endif
if (af == AF_IPX || af == AF_UNSPEC)
for (tp = ipxprotox; tp->pr_name; tp++)
printproto(tp, tp->pr_name);
if ((af == AF_UNIX || af == AF_UNSPEC) && !sflag)
unixpr(nl[N_UNIXSW].n_value);
if (af == AF_APPLETALK || af == AF_UNSPEC)
for (tp = atalkprotox; tp->pr_name; tp++)
printproto(tp, tp->pr_name);
exit(0);
}
/*
* Print out protocol statistics or control blocks (per sflag).
* If the interface was not specifically requested, and the symbol
* is not in the namelist, ignore this one.
*/
static void
printproto(struct protox *tp, char *name)
{
void (*pr)(u_long, char *);
u_char i;
if (sflag) {
pr = tp->pr_stats;
i = tp->pr_sindex;
} else {
pr = tp->pr_cblocks;
i = tp->pr_index;
}
if (pr != NULL && i < sizeof(nl) / sizeof(nl[0]) &&
(nl[i].n_value || af != AF_UNSPEC))
(*pr)(nl[i].n_value, name);
}
/*
* Read kernel memory, return 0 on success.
*/
int
kread(u_long addr, void *buf, int size)
{
if (kvm_read(kvmd, addr, buf, size) != size) {
(void)fprintf(stderr, "%s: %s\n", __progname,
kvm_geterr(kvmd));
return (-1);
}
return (0);
}
char *
plural(int n)
{
return (n != 1 ? "s" : "");
}
char *
plurales(int n)
{
return (n != 1 ? "es" : "");
}
/*
* Find the protox for the given "well-known" name.
*/
static struct protox *
knownname(char *name)
{
struct protox **tpp, *tp;
for (tpp = protoprotox; *tpp; tpp++)
for (tp = *tpp; tp->pr_name; tp++)
if (strcmp(tp->pr_name, name) == 0)
return (tp);
return (NULL);
}
/*
* Find the protox corresponding to name.
*/
static struct protox *
name2protox(char *name)
{
struct protox *tp;
char **alias; /* alias from p->aliases */
struct protoent *p;
/*
* Try to find the name in the list of "well-known" names. If that
* fails, check if name is an alias for an Internet protocol.
*/
if ((tp = knownname(name)))
return (tp);
setprotoent(1); /* make protocol lookup cheaper */
while ((p = getprotoent())) {
/* assert: name not same as p->name */
for (alias = p->p_aliases; *alias; alias++)
if (strcmp(name, *alias) == 0) {
endprotoent();
return (knownname(p->p_name));
}
}
endprotoent();
return (NULL);
}
static void
usage(void)
{
(void)fprintf(stderr,
"usage: %s [-Aan] [-f address_family] [-M core] [-N system]\n", __progname);
(void)fprintf(stderr,
" %s [-bdgilmnqrstu] [-f address_family] [-M core] [-N system]\n", __progname);
(void)fprintf(stderr,
" %s [-bdn] [-I interface] [-M core] [-N system] [-w wait]\n", __progname);
(void)fprintf(stderr,
" %s [-s] [-M core] [-N system] [-p protocol]\n", __progname);
(void)fprintf(stderr,
" %s [-a] [-f address_family] [-i | -I interface]\n", __progname);
(void)fprintf(stderr,
" %s [-W interface]\n", __progname);
exit(1);
}