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freebsd/usr.bin/netstat/main.c
Joel Dahl da52b4caaf Remove the advertising clause from UCB copyrighted files in usr.bin. This 
is in accordance with the information provided at
ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change

Also add $FreeBSD$ to a few files to keep svn happy.

Discussed with:	imp, rwatson
2010-12-11 08:32:16 +00:00

818 lines
20 KiB
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Raw Blame History

/*-
* 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.
* 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 <sys/socketvar.h>
#include <netinet/in.h>
#ifdef NETGRAPH
#include <netgraph/ng_socket.h>
#endif
#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 <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "netstat.h"
static struct nlist nl[] = {
#define N_IFNET 0
{ .n_name = "_ifnet" },
#define N_RTSTAT 1
{ .n_name = "_rtstat" },
#define N_RTREE 2
{ .n_name = "_rt_tables"},
#define N_MRTSTAT 3
{ .n_name = "_mrtstat" },
#define N_MFCHASHTBL 4
{ .n_name = "_mfchashtbl" },
#define N_VIFTABLE 5
{ .n_name = "_viftable" },
#define N_IPX 6
{ .n_name = "_ipxpcb_list"},
#define N_IPXSTAT 7
{ .n_name = "_ipxstat"},
#define N_SPXSTAT 8
{ .n_name = "_spx_istat"},
#define N_DDPSTAT 9
{ .n_name = "_ddpstat"},
#define N_DDPCB 10
{ .n_name = "_ddpcb"},
#define N_NGSOCKS 11
{ .n_name = "_ngsocklist"},
#define N_IP6STAT 12
{ .n_name = "_ip6stat" },
#define N_ICMP6STAT 13
{ .n_name = "_icmp6stat" },
#define N_IPSECSTAT 14
{ .n_name = "_ipsec4stat" },
#define N_IPSEC6STAT 15
{ .n_name = "_ipsec6stat" },
#define N_PIM6STAT 16
{ .n_name = "_pim6stat" },
#define N_MRT6STAT 17
{ .n_name = "_mrt6stat" },
#define N_MF6CTABLE 18
{ .n_name = "_mf6ctable" },
#define N_MIF6TABLE 19
{ .n_name = "_mif6table" },
#define N_PFKEYSTAT 20
{ .n_name = "_pfkeystat" },
#define N_MBSTAT 21
{ .n_name = "_mbstat" },
#define N_MBTYPES 22
{ .n_name = "_mbtypes" },
#define N_NMBCLUSTERS 23
{ .n_name = "_nmbclusters" },
#define N_NMBUFS 24
{ .n_name = "_nmbufs" },
#define N_MBHI 25
{ .n_name = "_mbuf_hiwm" },
#define N_CLHI 26
{ .n_name = "_clust_hiwm" },
#define N_NCPUS 27
{ .n_name = "_smp_cpus" },
#define N_PAGESZ 28
{ .n_name = "_pagesize" },
#define N_MBPSTAT 29
{ .n_name = "_mb_statpcpu" },
#define N_RTTRASH 30
{ .n_name = "_rttrash" },
#define N_MBLO 31
{ .n_name = "_mbuf_lowm" },
#define N_CLLO 32
{ .n_name = "_clust_lowm" },
#define N_CARPSTAT 33
{ .n_name = "_carpstats" },
#define N_PFSYNCSTAT 34
{ .n_name = "_pfsyncstats" },
#define N_AHSTAT 35
{ .n_name = "_ahstat" },
#define N_ESPSTAT 36
{ .n_name = "_espstat" },
#define N_IPCOMPSTAT 37
{ .n_name = "_ipcompstat" },
#define N_TCPSTAT 38
{ .n_name = "_tcpstat" },
#define N_UDPSTAT 39
{ .n_name = "_udpstat" },
#define N_IPSTAT 40
{ .n_name = "_ipstat" },
#define N_ICMPSTAT 41
{ .n_name = "_icmpstat" },
#define N_IGMPSTAT 42
{ .n_name = "_igmpstat" },
#define N_PIMSTAT 43
{ .n_name = "_pimstat" },
#define N_TCBINFO 44
{ .n_name = "_tcbinfo" },
#define N_UDBINFO 45
{ .n_name = "_udbinfo" },
#define N_DIVCBINFO 46
{ .n_name = "_divcbinfo" },
#define N_RIPCBINFO 47
{ .n_name = "_ripcbinfo" },
#define N_UNP_COUNT 48
{ .n_name = "_unp_count" },
#define N_UNP_GENCNT 49
{ .n_name = "_unp_gencnt" },
#define N_UNP_DHEAD 50
{ .n_name = "_unp_dhead" },
#define N_UNP_SHEAD 51
{ .n_name = "_unp_shead" },
#define N_RIP6STAT 52
{ .n_name = "_rip6stat" },
#define N_SCTPSTAT 53
{ .n_name = "_sctpstat" },
#define N_MFCTABLESIZE 54
{ .n_name = "_mfctablesize" },
#define N_ARPSTAT 55
{ .n_name = "_arpstat" },
#define N_UNP_SPHEAD 56
{ .n_name = "unp_sphead" },
{ .n_name = NULL },
};
struct protox {
int pr_index; /* index into nlist of cb head */
int 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, int);
/* control blocks printing routine */
void (*pr_stats)(u_long, const char *, int, int);
/* statistics printing routine */
void (*pr_istats)(char *); /* per/if statistics printing routine */
const char *pr_name; /* well-known name */
int pr_usesysctl; /* non-zero if we use sysctl, not kvm */
int pr_protocol;
} protox[] = {
{ N_TCBINFO, N_TCPSTAT, 1, protopr,
tcp_stats, NULL, "tcp", 1, IPPROTO_TCP },
{ N_UDBINFO, N_UDPSTAT, 1, protopr,
udp_stats, NULL, "udp", 1, IPPROTO_UDP },
#ifdef SCTP
{ -1, N_SCTPSTAT, 1, sctp_protopr,
sctp_stats, NULL, "sctp", 1, IPPROTO_SCTP },
#endif
{ N_DIVCBINFO, -1, 1, protopr,
NULL, NULL, "divert", 1, IPPROTO_DIVERT },
{ N_RIPCBINFO, N_IPSTAT, 1, protopr,
ip_stats, NULL, "ip", 1, IPPROTO_RAW },
{ N_RIPCBINFO, N_ICMPSTAT, 1, protopr,
icmp_stats, NULL, "icmp", 1, IPPROTO_ICMP },
{ N_RIPCBINFO, N_IGMPSTAT, 1, protopr,
igmp_stats, NULL, "igmp", 1, IPPROTO_IGMP },
#ifdef IPSEC
{ -1, N_IPSECSTAT, 1, NULL, /* keep as compat */
ipsec_stats, NULL, "ipsec", 0, 0},
{ -1, N_AHSTAT, 1, NULL,
ah_stats, NULL, "ah", 0, 0},
{ -1, N_ESPSTAT, 1, NULL,
esp_stats, NULL, "esp", 0, 0},
{ -1, N_IPCOMPSTAT, 1, NULL,
ipcomp_stats, NULL, "ipcomp", 0, 0},
#endif
{ N_RIPCBINFO, N_PIMSTAT, 1, protopr,
pim_stats, NULL, "pim", 1, IPPROTO_PIM },
{ -1, N_CARPSTAT, 1, NULL,
carp_stats, NULL, "carp", 1, 0 },
{ -1, N_PFSYNCSTAT, 1, NULL,
pfsync_stats, NULL, "pfsync", 1, 0 },
{ -1, N_ARPSTAT, 1, NULL,
arp_stats, NULL, "arp", 1, 0 },
{ -1, -1, 0, NULL,
NULL, NULL, NULL, 0, 0 }
};
#ifdef INET6
struct protox ip6protox[] = {
{ N_TCBINFO, N_TCPSTAT, 1, protopr,
tcp_stats, NULL, "tcp", 1, IPPROTO_TCP },
{ N_UDBINFO, N_UDPSTAT, 1, protopr,
udp_stats, NULL, "udp", 1, IPPROTO_UDP },
{ N_RIPCBINFO, N_IP6STAT, 1, protopr,
ip6_stats, ip6_ifstats, "ip6", 1, IPPROTO_RAW },
{ N_RIPCBINFO, N_ICMP6STAT, 1, protopr,
icmp6_stats, icmp6_ifstats, "icmp6", 1, IPPROTO_ICMPV6 },
#ifdef IPSEC
{ -1, N_IPSEC6STAT, 1, NULL,
ipsec_stats, NULL, "ipsec6", 0, 0 },
#endif
#ifdef notyet
{ -1, N_PIM6STAT, 1, NULL,
pim6_stats, NULL, "pim6", 1, 0 },
#endif
{ -1, N_RIP6STAT, 1, NULL,
rip6_stats, NULL, "rip6", 1, 0 },
{ -1, -1, 0, NULL,
NULL, NULL, NULL, 0, 0 }
};
#endif /*INET6*/
#ifdef IPSEC
struct protox pfkeyprotox[] = {
{ -1, N_PFKEYSTAT, 1, NULL,
pfkey_stats, NULL, "pfkey", 0, 0 },
{ -1, -1, 0, NULL,
NULL, NULL, NULL, 0, 0 }
};
#endif
struct protox atalkprotox[] = {
{ N_DDPCB, N_DDPSTAT, 1, atalkprotopr,
ddp_stats, NULL, "ddp", 0, 0 },
{ -1, -1, 0, NULL,
NULL, NULL, NULL, 0, 0 }
};
#ifdef NETGRAPH
struct protox netgraphprotox[] = {
{ N_NGSOCKS, -1, 1, netgraphprotopr,
NULL, NULL, "ctrl", 0, 0 },
{ N_NGSOCKS, -1, 1, netgraphprotopr,
NULL, NULL, "data", 0, 0 },
{ -1, -1, 0, NULL,
NULL, NULL, NULL, 0, 0 }
};
#endif
#ifdef IPX
struct protox ipxprotox[] = {
{ N_IPX, N_IPXSTAT, 1, ipxprotopr,
ipx_stats, NULL, "ipx", 0, 0 },
{ N_IPX, N_SPXSTAT, 1, ipxprotopr,
spx_stats, NULL, "spx", 0, 0 },
{ -1, -1, 0, NULL,
NULL, NULL, 0, 0, 0 }
};
#endif
struct protox *protoprotox[] = {
protox,
#ifdef INET6
ip6protox,
#endif
#ifdef IPSEC
pfkeyprotox,
#endif
#ifdef IPX
ipxprotox,
#endif
atalkprotox, NULL };
static void printproto(struct protox *, const char *);
static void usage(void);
static struct protox *name2protox(const char *);
static struct protox *knownname(const 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 noutputs = 0; /* how much outputs before we exit */
int numeric_addr; /* show addresses numerically */
int numeric_port; /* show ports numerically */
static int pflag; /* show given protocol */
int Qflag; /* show netisr information */
int rflag; /* show routing tables (or routing stats) */
int sflag; /* show protocol statistics */
int Wflag; /* wide display */
int Tflag; /* TCP Information */
int xflag; /* extra information, includes all socket buffer info */
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 live; /* true if we are examining a live system */
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:Qq:rSTsuWw:xz"))
!= -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;
#ifdef NETGRAPH
else if (strcmp(optarg, "ng") == 0
|| strcmp(optarg, "netgraph") == 0)
af = AF_NETGRAPH;
#endif
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 'Q':
Qflag = 1;
break;
case 'q':
noutputs = atoi(optarg);
if (noutputs != 0)
noutputs++;
break;
case 'r':
rflag = 1;
break;
case 's':
++sflag;
break;
case 'S':
numeric_addr = 1;
break;
case 'u':
af = AF_UNIX;
break;
case 'W':
case 'l':
Wflag = 1;
break;
case 'w':
interval = atoi(optarg);
iflag = 1;
break;
case 'T':
Tflag = 1;
break;
case 'x':
xflag = 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.
*/
live = (nlistf == NULL && memf == NULL);
if (!live)
setgid(getgid());
if (xflag && Tflag)
errx(1, "-x and -T are incompatible, pick one.");
if (Bflag) {
if (!live)
usage();
bpf_stats(interface);
exit(0);
}
if (mflag) {
if (!live) {
if (kread(0, NULL, 0) == 0)
mbpr(kvmd, nl[N_MBSTAT].n_value);
} else
mbpr(NULL, 0);
exit(0);
}
if (Qflag) {
if (!live) {
if (kread(0, NULL, 0) == 0)
netisr_stats(kvmd);
} else
netisr_stats(NULL);
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
kread(0, NULL, 0);
if (iflag && !sflag) {
intpr(interval, nl[N_IFNET].n_value, NULL);
exit(0);
}
if (rflag) {
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) {
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_MFCHASHTBL].n_value,
nl[N_MFCTABLESIZE].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
}
exit(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) {
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);
#ifdef NETGRAPH
if (af == AF_NETGRAPH || af == AF_UNSPEC)
for (tp = netgraphprotox; tp->pr_name; tp++)
printproto(tp, tp->pr_name);
#endif /* NETGRAPH */
if ((af == AF_UNIX || af == AF_UNSPEC) && !sflag)
unixpr(nl[N_UNP_COUNT].n_value, nl[N_UNP_GENCNT].n_value,
nl[N_UNP_DHEAD].n_value, nl[N_UNP_SHEAD].n_value,
nl[N_UNP_SPHEAD].n_value);
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, 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;
}
if (tp->pr_usesysctl && live)
off = 0;
else if (tp->pr_sindex < 0) {
if (pflag)
printf(
"%s: stats routine doesn't work on cores\n",
tp->pr_name);
return;
} else
off = 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;
}
if (tp->pr_usesysctl && live)
off = 0;
else if (tp->pr_index < 0) {
if (pflag)
printf(
"%s: PCB routine doesn't work on cores\n",
tp->pr_name);
return;
} else
off = nl[tp->pr_index].n_value;
}
if (pr != NULL && (off || (live && tp->pr_usesysctl) ||
af != AF_UNSPEC))
(*pr)(off, name, af, tp->pr_protocol);
}
/*
* Read kernel memory, return 0 on success.
*/
int
kread(u_long addr, void *buf, size_t size)
{
char errbuf[_POSIX2_LINE_MAX];
if (kvmd == NULL) {
kvmd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf);
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: %s", errbuf);
return(-1);
}
}
if (!buf)
return (0);
if (kvm_read(kvmd, addr, buf, size) != (ssize_t)size) {
warnx("%s", kvm_geterr(kvmd));
return (-1);
}
return (0);
}
const char *
plural(uintmax_t n)
{
return (n != 1 ? "s" : "");
}
const char *
plurales(uintmax_t n)
{
return (n != 1 ? "es" : "");
}
const char *
pluralies(uintmax_t n)
{
return (n != 1 ? "ies" : "y");
}
/*
* Find the protox for the given "well-known" name.
*/
static struct protox *
knownname(const 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(const 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%s\n",
"usage: netstat [-AaLnSTWx] [-f protocol_family | -p protocol]\n"
" [-M core] [-N system]",
" netstat -i | -I interface [-abdhnW] [-f address_family]\n"
" [-M core] [-N system]",
" netstat -w wait [-I interface] [-d] [-M core] [-N system] [-q howmany]",
" netstat -s [-s] [-z] [-f protocol_family | -p protocol]\n"
" [-M core] [-N system]",
" 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 [-AanW] [-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]",
" netstat -Q");
exit(1);
}
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