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freebsd-skq/usr.bin/netstat/main.c
rwatson 8361c9bf55 Modify netstat -mb to use libmemstat when accessing a core dump or live 
kernel memory and not using sysctl.  Previously, libmemstat was used
only for the live kernel via sysctl paths.

This results in netstat output becoming both more consistent between
core dumps and the live kernel, and also more information in the core
dump case than previously (i.e., mbuf cache information).

Statistics relating to sfbufs still rely on a kvm descriptor as they
are not currently exposed via libmemstat.  netstat -m operating on a
core is still unable to print certain sfbuf stats available on the live
kernel.

MFC after:	1 week
2005-11-13 14:06:01 +00:00

713 lines
16 KiB
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/*
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. 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 const copyright[] =
"@(#) Copyright (c) 1983, 1988, 1993\n\
Regents of the University of California. All rights reserved.\n";
#endif /* not lint */
#if 0
#ifndef lint
static char sccsid[] = "@(#)main.c 8.4 (Berkeley) 3/1/94";
#endif /* not lint */
#endif
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/file.h>
#include <sys/protosw.h>
#include <sys/socket.h>
#include <netinet/in.h>
#include <netgraph/ng_socket.h>
#include <ctype.h>
#include <err.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"
static struct nlist nl[] = {
#define N_IFNET 0
{ "_ifnet" },
#define N_RTSTAT 1
{ "_rtstat" },
#define N_RTREE 2
{ "_rt_tables"},
#define N_MRTSTAT 3
{ "_mrtstat" },
#define N_MFCTABLE 4
{ "_mfctable" },
#define N_VIFTABLE 5
{ "_viftable" },
#define N_IPX 6
{ "_ipxpcb_list"},
#define N_IPXSTAT 7
{ "_ipxstat"},
#define N_SPXSTAT 8
{ "_spx_istat"},
#define N_DDPSTAT 9
{ "_ddpstat"},
#define N_DDPCB 10
{ "_ddpcb"},
#define N_NGSOCKS 11
{ "_ngsocklist"},
#define N_IP6STAT 12
{ "_ip6stat" },
#define N_ICMP6STAT 13
{ "_icmp6stat" },
#define N_IPSECSTAT 14
{ "_ipsecstat" },
#define N_IPSEC6STAT 15
{ "_ipsec6stat" },
#define N_PIM6STAT 16
{ "_pim6stat" },
#define N_MRT6STAT 17
{ "_mrt6stat" },
#define N_MF6CTABLE 18
{ "_mf6ctable" },
#define N_MIF6TABLE 19
{ "_mif6table" },
#define N_PFKEYSTAT 20
{ "_pfkeystat" },
#define N_MBSTAT 21
{ "_mbstat" },
#define N_MBTYPES 22
{ "_mbtypes" },
#define N_NMBCLUSTERS 23
{ "_nmbclusters" },
#define N_NMBUFS 24
{ "_nmbufs" },
#define N_MBHI 25
{ "_mbuf_hiwm" },
#define N_CLHI 26
{ "_clust_hiwm" },
#define N_NCPUS 27
{ "_smp_cpus" },
#define N_PAGESZ 28
{ "_pagesize" },
#define N_MBPSTAT 29
{ "_mb_statpcpu" },
#define N_RTTRASH 30
{ "_rttrash" },
#define N_MBLO 31
{ "_mbuf_lowm" },
#define N_CLLO 32
{ "_clust_lowm" },
#define N_CARPSTAT 33
{ "_carpstats" },
#define N_PFSYNCSTAT 34
{ "_pfsyncstats" },
{ "" },
};
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, const char *, int);
/* control blocks printing routine */
void (*pr_stats)(u_long, const char *, int);
/* statistics printing routine */
void (*pr_istats)(char *); /* per/if statistics printing routine */
const char *pr_name; /* well-known name */
u_long pr_usesysctl; /* non-zero if we use sysctl, not kvm */
} protox[] = {
{ -1, -1, 1, protopr,
tcp_stats, NULL, "tcp", IPPROTO_TCP },
{ -1, -1, 1, protopr,
udp_stats, NULL, "udp", IPPROTO_UDP },
{ -1, -1, 1, protopr,
NULL, NULL, "divert",IPPROTO_DIVERT },
{ -1, -1, 1, protopr,
ip_stats, NULL, "ip", IPPROTO_RAW },
{ -1, -1, 1, protopr,
icmp_stats, NULL, "icmp", IPPROTO_ICMP },
{ -1, -1, 1, protopr,
igmp_stats, NULL, "igmp", IPPROTO_IGMP },
#ifdef IPSEC
{ -1, N_IPSECSTAT, 1, NULL,
ipsec_stats, NULL, "ipsec", 0},
#endif
{ -1, -1, 1, protopr,
pim_stats, NULL, "pim", IPPROTO_PIM },
{ -1, N_CARPSTAT, 1, 0,
carp_stats, NULL, "carp", 0},
{ -1, -1, 1, NULL,
pfsync_stats, NULL, "pfsync", 1},
{ -1, -1, 0, NULL,
NULL, NULL, NULL, 0 }
};
#ifdef INET6
struct protox ip6protox[] = {
{ -1, -1, 1, protopr,
tcp_stats, NULL, "tcp", IPPROTO_TCP },
{ -1, -1, 1, protopr,
udp_stats, NULL, "udp", IPPROTO_UDP },
{ -1, N_IP6STAT, 1, protopr,
ip6_stats, ip6_ifstats, "ip6", IPPROTO_RAW },
{ -1, N_ICMP6STAT, 1, protopr,
icmp6_stats, icmp6_ifstats, "icmp6",IPPROTO_ICMPV6 },
#ifdef IPSEC
{ -1, N_IPSEC6STAT, 1, NULL,
ipsec_stats, NULL, "ipsec6",0 },
#endif
#ifdef notyet
{ -1, N_PIM6STAT, 1, NULL,
pim6_stats, NULL, "pim6", 0 },
#endif
{ -1, -1, 1, NULL,
rip6_stats, NULL, "rip6", 0 },
{ -1, -1, 0, NULL,
NULL, NULL, NULL, 0 }
};
#endif /*INET6*/
#ifdef IPSEC
struct protox pfkeyprotox[] = {
{ -1, N_PFKEYSTAT, 1, NULL,
pfkey_stats, NULL, "pfkey", 0 },
{ -1, -1, 0, NULL,
NULL, NULL, NULL, 0 }
};
#endif
struct protox atalkprotox[] = {
{ N_DDPCB, N_DDPSTAT, 1, atalkprotopr,
ddp_stats, NULL, "ddp", 0 },
{ -1, -1, 0, NULL,
NULL, NULL, NULL, 0 }
};
struct protox netgraphprotox[] = {
{ N_NGSOCKS, -1, 1, netgraphprotopr,
NULL, NULL, "ctrl", 0 },
{ N_NGSOCKS, -1, 1, netgraphprotopr,
NULL, NULL, "data", 0 },
{ -1, -1, 0, NULL,
NULL, NULL, NULL, 0 }
};
#ifdef IPX
struct protox ipxprotox[] = {
{ N_IPX, N_IPXSTAT, 1, ipxprotopr,
ipx_stats, NULL, "ipx", 0 },
{ N_IPX, N_SPXSTAT, 1, ipxprotopr,
spx_stats, NULL, "spx", 0 },
{ -1, -1, 0, NULL,
NULL, NULL, 0, 0 }
};
#endif
struct protox *protoprotox[] = {
protox,
#ifdef INET6
ip6protox,
#endif
#ifdef IPSEC
pfkeyprotox,
#endif
#ifdef IPX
ipxprotox,
#endif
atalkprotox, NULL };
const char *pluralies(int);
static void printproto(struct protox *, const char *);
static void usage(void);
static struct protox *name2protox(char *);
static struct protox *knownname(char *);
static kvm_t *kvmd;
static char *nlistf = NULL, *memf = NULL;
int Aflag; /* show addresses of protocol control block */
int aflag; /* show all sockets (including servers) */
int Bflag; /* show information about bpf consumers */
int bflag; /* show i/f total bytes in/out */
int dflag; /* show i/f dropped packets */
int gflag; /* show group (multicast) routing or stats */
int hflag; /* show counters in human readable format */
int iflag; /* show interfaces */
int Lflag; /* show size of listen queues */
int mflag; /* show memory stats */
int numeric_addr; /* show addresses numerically */
int numeric_port; /* show ports numerically */
static int pflag; /* show given protocol */
int rflag; /* show routing tables (or routing stats) */
int sflag; /* show protocol statistics */
int tflag; /* show i/f watchdog timers */
int Wflag; /* wide display */
int zflag; /* zero stats */
int interval; /* repeat interval for i/f stats */
char *interface; /* desired i/f for stats, or NULL for all i/fs */
int unit; /* unit number for above */
int af; /* address family */
int
main(int argc, char *argv[])
{
struct protox *tp = NULL; /* for printing cblocks & stats */
int ch;
af = AF_UNSPEC;
while ((ch = getopt(argc, argv, "AaBbdf:ghI:iLlM:mN:np:rSstuWw:z")) != -1)
switch(ch) {
case 'A':
Aflag = 1;
break;
case 'a':
aflag = 1;
break;
case 'B':
Bflag = 1;
break;
case 'b':
bflag = 1;
break;
case 'd':
dflag = 1;
break;
case 'f':
if (strcmp(optarg, "ipx") == 0)
af = AF_IPX;
else if (strcmp(optarg, "inet") == 0)
af = AF_INET;
#ifdef INET6
else if (strcmp(optarg, "inet6") == 0)
af = AF_INET6;
#endif
#ifdef IPSEC
else if (strcmp(optarg, "pfkey") == 0)
af = PF_KEY;
#endif
else if (strcmp(optarg, "unix") == 0)
af = AF_UNIX;
else if (strcmp(optarg, "atalk") == 0)
af = AF_APPLETALK;
else if (strcmp(optarg, "ng") == 0
|| strcmp(optarg, "netgraph") == 0)
af = AF_NETGRAPH;
else if (strcmp(optarg, "link") == 0)
af = AF_LINK;
else {
errx(1, "%s: unknown address family", optarg);
}
break;
case 'g':
gflag = 1;
break;
case 'h':
hflag = 1;
break;
case 'I': {
char *cp;
iflag = 1;
for (cp = interface = optarg; isalpha(*cp); cp++)
continue;
unit = atoi(cp);
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':
numeric_addr = numeric_port = 1;
break;
case 'p':
if ((tp = name2protox(optarg)) == NULL) {
errx(1,
"%s: unknown or uninstrumented protocol",
optarg);
}
pflag = 1;
break;
case 'r':
rflag = 1;
break;
case 's':
++sflag;
break;
case 'S':
numeric_addr = 1;
break;
case 't':
tflag = 1;
break;
case 'u':
af = AF_UNIX;
break;
case 'W':
case 'l':
Wflag = 1;
break;
case 'w':
interval = atoi(optarg);
iflag = 1;
break;
case 'z':
zflag = 1;
break;
case '?':
default:
usage();
}
argv += optind;
argc -= optind;
#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
/*
* 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)
setgid(getgid());
if (Bflag) {
bpf_stats(interface);
exit(0);
}
if (mflag) {
if (memf != NULL) {
if (kread(0, 0, 0) == 0)
mbpr(kvmd, nl[N_MBSTAT].n_value);
} else
mbpr(NULL, 0);
exit(0);
}
#if 0
/*
* Keep file descriptors open to avoid overhead
* of open/close on each call to get* routines.
*/
sethostent(1);
setnetent(1);
#else
/*
* This does not make sense any more with DNS being default over
* the files. Doing a setXXXXent(1) causes a tcp connection to be
* used for the queries, which is slower.
*/
#endif
if (iflag && !sflag) {
kread(0, 0, 0);
intpr(interval, nl[N_IFNET].n_value, NULL);
exit(0);
}
if (rflag) {
kread(0, 0, 0);
if (sflag)
rt_stats(nl[N_RTSTAT].n_value, nl[N_RTTRASH].n_value);
else
routepr(nl[N_RTREE].n_value);
exit(0);
}
if (gflag) {
kread(0, 0, 0);
if (sflag) {
if (af == AF_INET || af == AF_UNSPEC)
mrt_stats(nl[N_MRTSTAT].n_value);
#ifdef INET6
if (af == AF_INET6 || af == AF_UNSPEC)
mrt6_stats(nl[N_MRT6STAT].n_value);
#endif
} else {
if (af == AF_INET || af == AF_UNSPEC)
mroutepr(nl[N_MFCTABLE].n_value,
nl[N_VIFTABLE].n_value);
#ifdef INET6
if (af == AF_INET6 || af == AF_UNSPEC)
mroute6pr(nl[N_MF6CTABLE].n_value,
nl[N_MIF6TABLE].n_value);
#endif
}
ifmalist_dump();
exit(0);
}
kread(0, 0, 0);
if (tp) {
printproto(tp, tp->pr_name);
exit(0);
}
if (af == AF_INET || af == AF_UNSPEC)
for (tp = protox; tp->pr_name; tp++)
printproto(tp, tp->pr_name);
#ifdef INET6
if (af == AF_INET6 || af == AF_UNSPEC)
for (tp = ip6protox; tp->pr_name; tp++)
printproto(tp, tp->pr_name);
#endif /*INET6*/
#ifdef IPSEC
if (af == PF_KEY || af == AF_UNSPEC)
for (tp = pfkeyprotox; tp->pr_name; tp++)
printproto(tp, tp->pr_name);
#endif /*IPSEC*/
#ifdef IPX
if (af == AF_IPX || af == AF_UNSPEC) {
kread(0, 0, 0);
for (tp = ipxprotox; tp->pr_name; tp++)
printproto(tp, tp->pr_name);
}
#endif /* IPX */
if (af == AF_APPLETALK || af == AF_UNSPEC)
for (tp = atalkprotox; tp->pr_name; tp++)
printproto(tp, tp->pr_name);
if (af == AF_NETGRAPH || af == AF_UNSPEC)
for (tp = netgraphprotox; tp->pr_name; tp++)
printproto(tp, tp->pr_name);
if ((af == AF_UNIX || af == AF_UNSPEC) && !Lflag && !sflag)
unixpr();
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(tp, name)
struct protox *tp;
const char *name;
{
void (*pr)(u_long, const char *, int);
u_long off;
if (sflag) {
if (iflag) {
if (tp->pr_istats)
intpr(interval, nl[N_IFNET].n_value,
tp->pr_istats);
else if (pflag)
printf("%s: no per-interface stats routine\n",
tp->pr_name);
return;
}
else {
pr = tp->pr_stats;
if (!pr) {
if (pflag)
printf("%s: no stats routine\n",
tp->pr_name);
return;
}
off = tp->pr_usesysctl ? tp->pr_usesysctl
: nl[tp->pr_sindex].n_value;
}
} else {
pr = tp->pr_cblocks;
if (!pr) {
if (pflag)
printf("%s: no PCB routine\n", tp->pr_name);
return;
}
off = tp->pr_usesysctl ? tp->pr_usesysctl
: nl[tp->pr_index].n_value;
}
if (pr != NULL && (off || af != AF_UNSPEC))
(*pr)(off, name, af);
}
/*
* Read kernel memory, return 0 on success.
*/
int
kread(u_long addr, char *buf, int size)
{
if (kvmd == 0) {
/*
* XXX.
*/
kvmd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, buf);
setgid(getgid());
if (kvmd != NULL) {
if (kvm_nlist(kvmd, nl) < 0) {
if(nlistf)
errx(1, "%s: kvm_nlist: %s", nlistf,
kvm_geterr(kvmd));
else
errx(1, "kvm_nlist: %s", kvm_geterr(kvmd));
}
if (nl[0].n_type == 0) {
if(nlistf)
errx(1, "%s: no namelist", nlistf);
else
errx(1, "no namelist");
}
} else {
warnx("kvm not available");
return(-1);
}
}
if (!buf)
return (0);
if (kvm_read(kvmd, addr, buf, size) != size) {
warnx("%s", kvm_geterr(kvmd));
return (-1);
}
return (0);
}
const char *
plural(int n)
{
return (n != 1 ? "s" : "");
}
const char *
plurales(int n)
{
return (n != 1 ? "es" : "");
}
const char *
pluralies(int n)
{
return (n != 1 ? "ies" : "y");
}
/*
* 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)) != NULL)
return (tp);
setprotoent(1); /* make protocol lookup cheaper */
while ((p = getprotoent()) != NULL) {
/* 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, "%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n%s\n",
"usage: netstat [-AaLnSW] [-f protocol_family | -p protocol]\n"
" [-M core] [-N system]",
" netstat -i | -I interface [-abdhnt] [-f address_family]\n"
" [-M core] [-N system]",
" netstat -w wait [-I interface] [-d] [-M core] [-N system]",
" netstat -s [-s] [-z] [-f protocol_family | -p protocol] [-M core]",
" netstat -i | -I interface -s [-f protocol_family | -p protocol]\n"
" [-M core] [-N system]",
" netstat -m [-M core] [-N system]",
" netstat -B [ -I interface]",
" netstat -r [-AenW] [-f address_family] [-M core] [-N system]",
" netstat -rs [-s] [-M core] [-N system]",
" netstat -g [-W] [-f address_family] [-M core] [-N system]",
" netstat -gs [-s] [-f address_family] [-M core] [-N system]");
exit(1);
}
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