OpenBSD-4.6/usr.sbin/slstats/slstats.c
/* $OpenBSD: slstats.c,v 1.20 2005/04/04 09:03:08 deraadt Exp $ */
/* $NetBSD: slstats.c,v 1.6.6.1 1996/06/07 01:42:30 thorpej Exp $ */
/*
* print serial line IP statistics:
* slstats [-i interval] [-v] [interface]
*
* Contributed by Van Jacobson (van@ee.lbl.gov), Dec 31, 1989.
*
* Copyright (c) 1989, 1990, 1991, 1992 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
static char rcsid[] = "$OpenBSD: slstats.c,v 1.20 2005/04/04 09:03:08 deraadt Exp $";
#endif
#define INET
#include <sys/param.h>
#include <sys/mbuf.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/ioctl.h>
#include <sys/file.h>
#include <net/if.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <netinet/ip_var.h>
#include <net/slcompress.h>
#include <net/if_slvar.h>
#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <fcntl.h>
#include <limits.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <paths.h>
#include <string.h>
#include <unistd.h>
extern char *__progname; /* from crt0.o */
int vflag;
u_int interval = 5;
int s;
char interface[IFNAMSIZ];
void catchalarm(int);
void intpr(void);
void usage(void);
int
main(int argc, char *argv[])
{
struct ifreq ifr;
int ch, unit;
(void)strlcpy(interface, "sl0", sizeof(interface));
while ((ch = getopt(argc, argv, "i:v")) != -1) {
switch (ch) {
case 'i':
interval = atoi(optarg);
if (interval <= 0)
usage();
break;
case 'v':
++vflag;
break;
default:
usage();
/* NOTREACHED */
}
}
argc -= optind;
argv += optind;
if (argc > 1)
usage();
if (argc > 0)
(void)strlcpy(interface, argv[0], sizeof(interface));
if (sscanf(interface, "sl%d", &unit) != 1 || unit < 0)
errx(1, "invalid interface '%s' specified", interface);
s = socket(AF_INET, SOCK_DGRAM, 0);
if (s < 0)
err(1, "couldn't create IP socket");
(void)strlcpy(ifr.ifr_name, interface, sizeof(ifr.ifr_name));
if (ioctl(s, SIOCGIFFLAGS, &ifr) < 0)
errx(1, "nonexistent interface '%s' specified", interface);
intpr();
exit(0);
}
#define V(offset) ((line % 20)? cur.offset - old.offset : cur.offset)
void
usage(void)
{
fprintf(stderr, "usage: %s [-v] [-i interval] [interface]\n",
__progname);
exit(1);
}
volatile sig_atomic_t signalled; /* set if alarm goes off "early" */
static void
get_sl_stats(struct sl_stats *curp)
{
struct ifslstatsreq req;
memset(&req, 0, sizeof(req));
(void)strlcpy(req.ifr_name, interface, sizeof(req.ifr_name));
if (ioctl(s, SIOCGSLSTATS, &req) < 0) {
if (errno == ENOTTY)
errx(1, "kernel support missing");
else
err(1, "couldn't get slip statistics");
}
*curp = req.stats;
}
/*
* Print a running summary of interface statistics.
* Repeat display every interval seconds, showing statistics
* collected over that interval. Assumes that interval is non-zero.
* First line printed at top of screen is always cumulative.
*/
void
intpr(void)
{
struct sl_stats cur, old;
sigset_t mask, oldmask;
int line = 0;
bzero(&old, sizeof(old));
while (1) {
get_sl_stats(&cur);
(void)signal(SIGALRM, (void (*)(int))catchalarm);
signalled = 0;
(void)alarm(interval);
if ((line % 20) == 0) {
printf("%8.8s %6.6s %6.6s %6.6s %6.6s",
"IN", "PACK", "COMP", "UNCOMP", "ERR");
if (vflag)
printf(" %6.6s %6.6s", "TOSS", "IP");
printf(" | %8.8s %6.6s %6.6s %6.6s %6.6s",
"OUT", "PACK", "COMP", "UNCOMP", "IP");
if (vflag)
printf(" %6.6s %6.6s", "SEARCH", "MISS");
putchar('\n');
}
printf("%8u %6d %6u %6u %6u", V(sl.sl_ibytes),
V(sl.sl_ipackets), V(vj.vjs_compressedin),
V(vj.vjs_uncompressedin), V(vj.vjs_errorin));
if (vflag)
printf(" %6u %6u", V(vj.vjs_tossed),
V(sl.sl_ipackets) - V(vj.vjs_compressedin) -
V(vj.vjs_uncompressedin) - V(vj.vjs_errorin));
printf(" | %8u %6d %6u %6u %6u", V(sl.sl_obytes),
V(sl.sl_opackets), V(vj.vjs_compressed),
V(vj.vjs_packets) - V(vj.vjs_compressed),
V(sl.sl_opackets) - V(vj.vjs_packets));
if (vflag)
printf(" %6u %6u", V(vj.vjs_searches),
V(vj.vjs_misses));
putchar('\n');
fflush(stdout);
line++;
sigemptyset(&mask);
sigaddset(&mask, SIGALRM);
sigprocmask(SIG_BLOCK, &mask, &oldmask);
if (!signalled) {
sigemptyset(&mask);
sigsuspend(&mask);
}
sigprocmask(SIG_BLOCK, &oldmask, NULL);
signalled = 0;
(void)alarm(interval);
old = cur;
}
}
/*
* Called if an interval expires before sidewaysintpr has completed a loop.
* Sets a flag to not wait for the alarm.
*/
/* ARGSUSED */
void
catchalarm(int signo)
{
signalled = 1;
}