/* $NetBSD: main.c,v 1.99.18.1 2022/09/12 14:23:41 martin 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.
*/
#include <sys/cdefs.h>
#ifndef lint
__COPYRIGHT("@(#) Copyright (c) 1983, 1988, 1993\
Regents of the University of California. All rights reserved.");
#endif /* not lint */
#ifndef lint
#if 0
static char sccsid[] = "from: @(#)main.c 8.4 (Berkeley) 3/1/94";
#else
__RCSID("$NetBSD: main.c,v 1.99.18.1 2022/09/12 14:23:41 martin Exp $");
#endif
#endif /* not lint */
#include <sys/param.h>
#include <sys/file.h>
#include <sys/protosw.h>
#include <sys/socket.h>
#include <net/if.h>
#include <netinet/in.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"
#include "rtutil.h"
#include "prog_ops.h"
int Aflag;
int aflag;
int Bflag;
int bflag;
int dflag;
#ifndef SMALL
int gflag;
#endif
int hflag;
int iflag;
int Lflag;
int lflag;
int mflag;
int numeric_addr;
int numeric_port;
int nflag;
int Pflag;
int pflag;
int qflag;
int rflag;
int sflag;
int tagflag;
int tflag;
int Vflag;
int vflag;
char *interface;
int af;
int use_sysctl;
int force_sysctl;
struct nlist nl[] = {
#define N_MBSTAT 0
{ "_mbstat", 0, 0, 0, 0 },
#define N_IPSTAT 1
{ "_ipstat", 0, 0, 0, 0 }, /* not available via kvm */
#define N_TCBTABLE 2
{ "_tcbtable", 0, 0, 0, 0 },
#define N_TCPSTAT 3
{ "_tcpstat", 0, 0, 0, 0 }, /* not available via kvm */
#define N_UDBTABLE 4
{ "_udbtable", 0, 0, 0, 0 },
#define N_UDPSTAT 5
{ "_udpstat", 0, 0, 0, 0 }, /* not available via kvm */
#define N_IFNET_LIST 6
{ "_ifnet_list", 0, 0, 0, 0 },
#define N_ICMPSTAT 7
{ "_icmpstat", 0, 0, 0, 0 }, /* not available via kvm */
#define N_RTSTAT 8
{ "_rtstat", 0, 0, 0, 0 },
#define N_UNIXSW 9
{ "_unixsw", 0, 0, 0, 0 },
#define N_RTREE 10
{ "_rt_tables", 0, 0, 0, 0 },
#define N_NFILE 11
{ "_nfile", 0, 0, 0, 0 },
#define N_IGMPSTAT 12
{ "_igmpstat", 0, 0, 0, 0 }, /* not available via kvm */
#define N_MRTPROTO 13
{ "_ip_mrtproto", 0, 0, 0, 0 },
#define N_MRTSTAT 14
{ "_mrtstat", 0, 0, 0, 0 },
#define N_MFCHASHTBL 15
{ "_mfchashtbl", 0, 0, 0, 0 },
#define N_MFCHASH 16
{ "_mfchash", 0, 0, 0, 0 },
#define N_VIFTABLE 17
{ "_viftable", 0, 0, 0, 0 },
#define N_MSIZE 18
{ "_msize", 0, 0, 0, 0 },
#define N_MCLBYTES 19
{ "_mclbytes", 0, 0, 0, 0 },
#define N_DDPSTAT 20
{ "_ddpstat", 0, 0, 0, 0 }, /* not available via kvm */
#define N_DDPCB 21
{ "_ddpcb", 0, 0, 0, 0 },
#define N_MBPOOL 22
{ "_mbpool", 0, 0, 0, 0 },
#define N_MCLPOOL 23
{ "_mclpool", 0, 0, 0, 0 },
#define N_IP6STAT 24
{ "_ip6stat", 0, 0, 0, 0 }, /* not available via kvm */
#define N_TCP6STAT 25
{ "_tcp6stat", 0, 0, 0, 0 }, /* not available via kvm */
#define N_UDP6STAT 26
{ "_udp6stat", 0, 0, 0, 0 }, /* not available via kvm */
#define N_ICMP6STAT 27
{ "_icmp6stat", 0, 0, 0, 0 }, /* not available via kvm */
#define N_IPSECSTAT 28
{ "_ipsecstat", 0, 0, 0, 0 }, /* not available via kvm */
#define N_IPSEC6STAT 29
{ "_ipsec6stat", 0, 0, 0, 0 }, /* not available via kvm */
#define N_PIM6STAT 30
{ "_pim6stat", 0, 0, 0, 0 }, /* not available via kvm */
#define N_MRT6PROTO 31
{ "_ip6_mrtproto", 0, 0, 0, 0 },
#define N_MRT6STAT 32
{ "_mrt6stat", 0, 0, 0, 0 },
#define N_MF6CTABLE 33
{ "_mf6ctable", 0, 0, 0, 0 },
#define N_MIF6TABLE 34
{ "_mif6table", 0, 0, 0, 0 },
#define N_PFKEYSTAT 35
{ "_pfkeystat", 0, 0, 0, 0 }, /* not available via kvm */
#define N_ARPSTAT 36
{ "_arpstat", 0, 0, 0, 0 }, /* not available via kvm */
#define N_RIP6STAT 37
{ "_rip6stat", 0, 0, 0, 0 }, /* not available via kvm */
#define N_ARPINTRQ 38
{ "_arpintrq", 0, 0, 0, 0 },
#define N_ATINTRQ1 39
{ "_atintrq1", 0, 0, 0, 0 },
#define N_ATINTRQ2 40
{ "_atintrq2", 0, 0, 0, 0 },
#define N_PPPOEDISCINQ 41
{ "_ppoediscinq", 0, 0, 0, 0 },
#define N_PPPOEINQ 42
{ "_ppoeinq", 0, 0, 0, 0 },
#define N_HARDCLOCK_TICKS 43
{ "_hardclock_ticks", 0, 0, 0, 0 },
#define N_PIMSTAT 44
{ "_pimstat", 0, 0, 0, 0 },
#define N_CARPSTAT 45
{ "_carpstats", 0, 0, 0, 0 }, /* not available via kvm */
#define N_PFSYNCSTAT 46
{ "_pfsyncstats", 0, 0, 0, 0}, /* not available via kvm */
{ "", 0, 0, 0, 0 },
};
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) /* control blocks printing routine */
(u_long, const char *);
void (*pr_stats) /* statistics printing routine */
(u_long, const char *);
void (*pr_istats) /* per/if statistics printing routine */
(const char *);
void (*pr_dump) /* PCB state dump routine */
(u_long, const char *, u_long);
const char *pr_name; /* well-known name */
} protox[] = {
{ N_TCBTABLE, N_TCPSTAT, 1, protopr,
tcp_stats, NULL, tcp_dump, "tcp" },
{ N_UDBTABLE, N_UDPSTAT, 1, protopr,
udp_stats, NULL, 0, "udp" },
{ -1, N_IPSTAT, 1, 0,
ip_stats, NULL, 0, "ip" },
{ -1, N_ICMPSTAT, 1, 0,
icmp_stats, NULL, 0, "icmp" },
{ -1, N_IGMPSTAT, 1, 0,
igmp_stats, NULL, 0, "igmp" },
{ -1, N_CARPSTAT, 1, 0,
carp_stats, NULL, 0, "carp" },
#ifdef IPSEC
{ -1, N_IPSECSTAT, 1, 0,
fast_ipsec_stats, NULL, 0, "ipsec" },
#endif
{ -1, N_PIMSTAT, 1, 0,
pim_stats, NULL, 0, "pim" },
{ -1, N_PFSYNCSTAT, 1, 0,
pfsync_stats, NULL, 0, "pfsync" },
{ -1, -1, 0, 0,
0, NULL, 0, 0 }
};
#ifdef INET6
struct protox ip6protox[] = {
{ -1, N_IP6STAT, 1, 0,
ip6_stats, ip6_ifstats, 0, "ip6" },
{ -1, N_ICMP6STAT, 1, 0,
icmp6_stats, icmp6_ifstats, 0, "icmp6" },
#ifdef TCP6
{ N_TCBTABLE, N_TCP6STAT, 1, ip6protopr,
tcp6_stats, NULL, tcp6_dump, "tcp6" },
#else
{ N_TCBTABLE, N_TCP6STAT, 1, ip6protopr,
tcp_stats, NULL, tcp6_dump, "tcp6" },
#endif
{ N_UDBTABLE, N_UDP6STAT, 1, ip6protopr,
udp6_stats, NULL, 0, "udp6" },
#ifdef IPSEC
{ -1, N_IPSEC6STAT, 1, 0,
fast_ipsec_stats, NULL, 0, "ipsec6" },
#endif
{ -1, N_PIM6STAT, 1, 0,
pim6_stats, NULL, 0, "pim6" },
{ -1, N_RIP6STAT, 1, 0,
rip6_stats, NULL, 0, "rip6" },
{ -1, -1, 0, 0,
0, NULL, 0, 0 }
};
#endif
struct protox arpprotox[] = {
{ -1, N_ARPSTAT, 1, 0,
arp_stats, NULL, 0, "arp" },
{ -1, -1, 0, 0,
0, NULL, 0, 0 }
};
#ifdef IPSEC
struct protox pfkeyprotox[] = {
{ -1, N_PFKEYSTAT, 1, 0,
pfkey_stats, NULL, 0, "pfkey" },
{ -1, -1, 0, 0,
0, NULL, 0, 0 }
};
#endif
#ifndef SMALL
struct protox atalkprotox[] = {
{ N_DDPCB, N_DDPSTAT, 1, atalkprotopr,
ddp_stats, NULL, 0, "ddp" },
{ -1, -1, 0, 0,
0, NULL, 0, NULL }
};
#endif
struct protox *protoprotox[] = { protox,
#ifdef INET6
ip6protox,
#endif
arpprotox,
#ifdef IPSEC
pfkeyprotox,
#endif
#ifndef SMALL
atalkprotox,
#endif
NULL };
const struct softintrq {
const char *siq_name;
int siq_index;
} softintrq[] = {
{ "arpintrq", N_ARPINTRQ },
{ "atintrq1", N_ATINTRQ1 },
{ "atintrq2", N_ATINTRQ2 },
{ "ppoediscinq", N_PPPOEDISCINQ },
{ "ppoeinq", N_PPPOEINQ },
{ NULL, -1 },
};
static void printproto(struct protox *, const char *);
static void print_softintrq(void);
__dead static void usage(void);
static struct protox *name2protox(const char *);
static struct protox *knownname(const char *);
static void prepare(const char *, const char *, struct protox *tp);
static kvm_t *prepare_kvmd(const char *, const char *, char *);
static kvm_t *kvmd = NULL;
gid_t egid;
int interval; /* repeat interval for i/f stats */
static const char *nlistf = NULL, *memf = NULL;
kvm_t *
get_kvmd(void)
{
char buf[_POSIX2_LINE_MAX];
if (kvmd != NULL)
return kvmd;
if ((kvmd = prepare_kvmd(nlistf, memf, buf)) == NULL)
errx(1, "kvm error: %s", buf);
return kvmd;
}
static kvm_t *
prepare_kvmd(const char *nf, const char *mf, char *errbuf)
{
kvm_t *k;
(void)setegid(egid);
k = kvm_openfiles(nf, mf, NULL, O_RDONLY, errbuf);
(void)setgid(getgid());
return k;
}
void
prepare(const char *nf, const char *mf, struct protox *tp)
{
char buf[_POSIX2_LINE_MAX];
/*
* Try to figure out if we can use sysctl or not.
*/
if (nf != NULL || mf != NULL) {
/* Of course, we can't use sysctl with dumps. */
if (force_sysctl)
errx(EXIT_FAILURE, "can't use sysctl with dumps");
/*
* If we have -M or -N, we're not dealing with live memory
* or want to use kvm interface explicitly. It is sometimes
* useful to dig inside of kernel without extending
* sysctl interface (i.e., without rebuilding kernel).
*/
use_sysctl = 0;
} else if (qflag ||
#ifndef SMALL
gflag ||
#endif
(pflag && tp->pr_sindex == N_PIMSTAT) ||
Pflag) {
/* These flags are not yet supported via sysctl(3). */
use_sysctl = 0;
} else {
/* We can use sysctl(3). */
use_sysctl = 1;
}
if (force_sysctl && !use_sysctl) {
/* Let the user know what's about to happen. */
warnx("forcing sysctl usage even though it might not be "
"supported");
use_sysctl = 1;
}
kvmd = prepare_kvmd(nf, mf, buf);
if (!use_sysctl) {
if (kvmd == NULL)
errx(1, "kvm error: %s", buf);
if (kvm_nlist(kvmd, nl) < 0 || nl[0].n_type == 0) {
if (nf)
errx(1, "%s: no namelist", nf);
else
errx(1, "no namelist");
}
} else
(void)setgid(getgid());
}
int
main(int argc, char *argv[])
{
struct protoent *p;
struct protox *tp; /* for printing cblocks & stats */
int ch;
char *cp;
char *afname, *afnames;
u_long pcbaddr;
if (prog_init) {
if (prog_init() == -1)
err(1, "init failed");
force_sysctl = 1; /* cheap trick */
}
egid = getegid();
(void)setegid(getgid());
tp = NULL;
af = AF_UNSPEC;
afnames = NULL;
pcbaddr = 0;
while ((ch = getopt(argc, argv,
"AabBdf:ghI:LliM:mN:nP:p:qrsStTuVvw:X")) != -1)
switch (ch) {
case 'A':
Aflag = RT_AFLAG;
break;
case 'a':
aflag = 1;
break;
case 'b':
bflag = 1;
break;
case 'B':
Bflag = 1;
break;
case 'd':
dflag = 1;
break;
case 'f':
afnames = optarg;
break;
#ifndef SMALL
case 'g':
gflag = 1;
break;
#endif
case 'h':
hflag = 1;
break;
case 'I':
iflag = 1;
interface = optarg;
break;
case 'i':
iflag = 1;
break;
case 'L':
Lflag = RT_LFLAG;
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 = nflag = RT_NFLAG;
break;
case 'P':
errno = 0;
pcbaddr = strtoul(optarg, &cp, 16);
if (*cp != '\0' || errno == ERANGE)
errx(1, "invalid PCB address %s", optarg);
Pflag = 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 'r':
rflag = 1;
break;
case 's':
++sflag;
break;
case 'S':
numeric_addr = 1;
break;
case 't':
tflag = 1;
break;
case 'T':
tagflag = RT_TFLAG;
break;
case 'u':
af = AF_LOCAL;
break;
case 'V':
Vflag++;
break;
case 'v':
vflag = RT_VFLAG;
break;
case 'w':
interval = atoi(optarg);
iflag = 1;
break;
case 'X':
force_sysctl = 1;
break;
case '?':
default:
usage();
}
argv += optind;
argc -= optind;
#define BACKWARD_COMPATIBILITY
#ifdef BACKWARD_COMPATIBILITY
if (*argv) {
if (isdigit((unsigned char)**argv)) {
interval = atoi(*argv);
if (interval <= 0)
usage();
++argv;
iflag = 1;
}
if (*argv) {
nlistf = *argv;
if (*++argv)
memf = *argv;
}
}
#endif
prepare(nlistf, memf, tp);
#ifndef SMALL
if (Bflag) {
if (sflag)
bpf_stats();
else
bpf_dump(interface);
exit(0);
}
#endif
if (mflag) {
mbpr(nl[N_MBSTAT].n_value, nl[N_MSIZE].n_value,
nl[N_MCLBYTES].n_value, nl[N_MBPOOL].n_value,
nl[N_MCLPOOL].n_value);
exit(0);
}
if (Pflag) {
if (tp == NULL) {
/* Default to TCP. */
tp = name2protox("tcp");
}
if (tp->pr_dump)
(*tp->pr_dump)(nl[tp->pr_index].n_value, tp->pr_name,
pcbaddr);
else
printf("%s: no PCB dump routine\n", tp->pr_name);
exit(0);
}
if (pflag) {
if (iflag && tp->pr_istats)
intpr(interval, nl[N_IFNET_LIST].n_value,
tp->pr_istats);
else if (tp->pr_stats)
(*tp->pr_stats)(nl[tp->pr_sindex].n_value,
tp->pr_name);
else
printf("%s: no stats routine\n", tp->pr_name);
exit(0);
}
if (qflag) {
print_softintrq();
exit(0);
}
/*
* Keep file descriptors open to avoid overhead
* of open/close on each call to get* routines.
*/
sethostent(1);
setnetent(1);
/*
* If -f was used afnames != NULL, loop over the address families.
* Otherwise do this at least once (with af == AF_UNSPEC).
*/
afname = NULL;
do {
if (afnames != NULL) {
afname = strsep(&afnames, ",");
if (afname == NULL)
break; /* Exit early */
if (strcmp(afname, "inet") == 0)
af = AF_INET;
else if (strcmp(afname, "inet6") == 0)
af = AF_INET6;
else if (strcmp(afname, "arp") == 0)
af = AF_ARP;
else if (strcmp(afname, "pfkey") == 0)
af = PF_KEY;
else if (strcmp(afname, "unix") == 0
|| strcmp(afname, "local") == 0)
af = AF_LOCAL;
else if (strcmp(afname, "atalk") == 0)
af = AF_APPLETALK;
else if (strcmp(afname, "mpls") == 0)
af = AF_MPLS;
else {
warnx("%s: unknown address family",
afname);
continue;
}
}
if (iflag) {
if (af != AF_UNSPEC)
goto protostat;
intpr(interval, nl[N_IFNET_LIST].n_value, NULL);
break;
}
if (rflag) {
if (sflag)
rt_stats(use_sysctl ? 0 :
nl[N_RTSTAT].n_value);
else {
if (use_sysctl)
p_rttables(af,
nflag|tagflag|vflag|Lflag, 0, ~0);
else
routepr(nl[N_RTREE].n_value);
}
break;
}
#ifndef SMALL
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
}
break;
}
#endif
protostat:
if (af == AF_INET || af == AF_UNSPEC) {
setprotoent(1);
setservent(1);
/* ugh, this is O(MN) ... why do we do this? */
while ((p = getprotoent()) != NULL) {
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);
tp->pr_wanted = 0;
}
endprotoent();
for (tp = protox; tp->pr_name; tp++)
if (tp->pr_wanted)
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
if (af == AF_ARP || af == AF_UNSPEC)
for (tp = arpprotox; tp->pr_name; tp++)
printproto(tp, tp->pr_name);
#ifdef IPSEC
if (af == PF_KEY || af == AF_UNSPEC)
for (tp = pfkeyprotox; tp->pr_name; tp++)
printproto(tp, tp->pr_name);
#endif
#ifndef SMALL
if (af == AF_APPLETALK || af == AF_UNSPEC)
for (tp = atalkprotox; tp->pr_name; tp++)
printproto(tp, tp->pr_name);
if ((af == AF_LOCAL || af == AF_UNSPEC) && !sflag)
unixpr(nl[N_UNIXSW].n_value);
#endif
} while (afnames != NULL && afname != NULL);
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, const char *name)
{
void (*pr)(u_long, const char *);
u_long off;
if (sflag) {
if (iflag) {
if (tp->pr_istats)
intpr(interval, nl[N_IFNET_LIST].n_value,
tp->pr_istats);
return;
}
else {
pr = tp->pr_stats;
off = nl[tp->pr_sindex].n_value;
}
} else {
pr = tp->pr_cblocks;
off = nl[tp->pr_index].n_value;
}
if (pr != NULL && ((off || af != AF_UNSPEC) || use_sysctl))
(*pr)(off, name);
}
/*
* Print softintrq status.
*/
void
print_softintrq(void)
{
struct ifqueue intrq, *ifq = &intrq;
const struct softintrq *siq;
u_long off;
for (siq = softintrq; siq->siq_name != NULL; siq++) {
off = nl[siq->siq_index].n_value;
if (off == 0)
continue;
kread(off, (char *)ifq, sizeof(*ifq));
printf("%s:\n", siq->siq_name);
printf("\tqueue length: %d\n", ifq->ifq_len);
printf("\tmaximum queue length: %d\n", ifq->ifq_maxlen);
printf("\tpackets dropped: %d\n", ifq->ifq_drops);
}
}
/*
* Read kernel memory, return 0 on success.
*/
int
kread(u_long addr, char *buf, int size)
{
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" : "");
}
int
get_hardticks(void)
{
int hardticks;
kread(nl[N_HARDCLOCK_TICKS].n_value, (char *)&hardticks,
sizeof(hardticks));
return hardticks;
}
/*
* 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)
{
const char *progname = getprogname();
(void)fprintf(stderr,
"usage: %s [-Aan] [-f address_family[,family ...]] [-M core] [-N system]\n", progname);
(void)fprintf(stderr,
" %s [-bdgiLmnqrsSv] [-f address_family[,family ...]] [-M core] [-N system]\n",
progname);
(void)fprintf(stderr,
" %s [-dn] [-I interface] [-M core] [-N system] [-w wait]\n", progname);
(void)fprintf(stderr,
" %s [-p protocol] [-M core] [-N system]\n", progname);
(void)fprintf(stderr,
" %s [-p protocol] [-M core] [-N system] -P pcbaddr\n", progname);
(void)fprintf(stderr,
" %s [-p protocol] [-i] [-I Interface] \n", progname);
(void)fprintf(stderr,
" %s [-s] [-f address_family[,family ...]] [-i] [-I Interface]\n", progname);
(void)fprintf(stderr,
" %s [-s] [-B] [-I interface]\n", progname);
exit(1);
}