273 lines
6.7 KiB
C
273 lines
6.7 KiB
C
/* $NetBSD: slstats.c,v 1.14 2002/06/18 22:32:16 itojun Exp $ */
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/*
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* print serial line IP statistics:
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* slstats [-i interval] [-v] [interface] [system [core]]
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*
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* Contributed by Van Jacobson (van@ee.lbl.gov), Dec 31, 1989.
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*
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* Copyright (c) 1989, 1990, 1991, 1992 Regents of the University of
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* California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#ifndef lint
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__RCSID("$NetBSD: slstats.c,v 1.14 2002/06/18 22:32:16 itojun Exp $");
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#endif
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#define INET
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#include <sys/param.h>
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#include <sys/mbuf.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <sys/file.h>
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#include <net/if.h>
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#include <netinet/in.h>
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#include <netinet/in_systm.h>
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#include <netinet/ip.h>
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#include <netinet/ip_var.h>
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#include <net/slcompress.h>
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#include <net/if_slvar.h>
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#include <ctype.h>
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#include <err.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <kvm.h>
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#include <limits.h>
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#include <nlist.h>
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#include <paths.h>
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#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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struct nlist nl[] = {
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#define N_SOFTC 0
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{ "_sl_softc" },
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{ "" },
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};
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char *kernel; /* kernel for namelist */
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char *kmemf; /* memory file */
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kvm_t *kd;
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int vflag;
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unsigned interval = 5;
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int unit;
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void catchalarm __P((int));
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void intpr __P((void));
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int main __P((int, char **));
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void usage __P((void));
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int
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main(argc, argv)
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int argc;
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char *argv[];
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{
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char errbuf[_POSIX2_LINE_MAX];
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gid_t egid = getegid();
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int ch;
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setegid(getgid());
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while ((ch = getopt(argc, argv, "i:M:N:v")) != -1) {
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switch (ch) {
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case 'i':
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interval = atoi(optarg);
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if (interval <= 0)
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usage();
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break;
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case 'M':
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kmemf = optarg;
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break;
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case 'N':
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kernel = optarg;
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break;
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case 'v':
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++vflag;
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break;
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default:
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usage();
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}
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}
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argc -= optind;
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argv += optind;
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if (argc > 1)
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usage();
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while (argc--) {
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if (isdigit(*argv[0])) {
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unit = atoi(*argv);
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if (unit < 0)
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usage();
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continue;
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}
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/* Fall to here, we have bogus arguments. */
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usage();
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}
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/*
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* Discard setgid privileges. If not the running kernel, we toss
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* them away totally so that bad guys can't print interesting stuff
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* from kernel memory, otherwise switch back to kmem for the
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* duration of the kvm_openfiles() call.
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*/
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if (kmemf != NULL || kernel != NULL)
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(void)setgid(getgid());
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else
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(void)setegid(egid);
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memset(errbuf, 0, sizeof(errbuf));
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if ((kd = kvm_openfiles(kernel, kmemf, NULL, O_RDONLY, errbuf)) == NULL)
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errx(1, "can't open kvm: %s", errbuf);
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/* get rid of it now anyway */
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if (kmemf == NULL && kernel == NULL)
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setgid(getgid());
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if (kvm_nlist(kd, nl) < 0 || nl[0].n_type == 0)
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errx(1, "%s: SLIP symbols not in namelist",
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kernel == NULL ? _PATH_UNIX : kernel);
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intpr();
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exit(0);
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}
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#define V(offset) ((line % 20)? sc->offset - osc->offset : sc->offset)
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#define AMT (sizeof(*sc) - 2 * sizeof(sc->sc_comp.tstate))
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void
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usage()
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{
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(void)fprintf(stderr, "usage: %s [-M core] [-N system] [-i interval] %s",
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getprogname(), "[-v] [unit]\n");
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exit(1);
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}
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u_char signalled; /* set if alarm goes off "early" */
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/*
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* Print a running summary of interface statistics.
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* Repeat display every interval seconds, showing statistics
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* collected over that interval. Assumes that interval is non-zero.
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* First line printed at top of screen is always cumulative.
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*/
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void
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intpr()
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{
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int line = 0;
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int oldmask;
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struct sl_softc *sc, *osc;
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u_long addr;
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addr = nl[N_SOFTC].n_value + unit * sizeof(struct sl_softc);
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sc = (struct sl_softc *)malloc(AMT);
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osc = (struct sl_softc *)malloc(AMT);
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memset((char *)osc, 0, AMT);
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while (1) {
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if (kvm_read(kd, addr, (char *)sc, AMT) != AMT)
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errx(1, "kvm_read: %s", kvm_geterr(kd));
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(void)signal(SIGALRM, catchalarm);
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signalled = 0;
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(void)alarm(interval);
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if ((line % 20) == 0) {
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(void)printf("%8.8s %6.6s %6.6s %6.6s %6.6s",
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"IN", "PACK", "COMP", "UNCOMP", "ERR");
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if (vflag)
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printf(" %6.6s %6.6s", "TOSS", "IP");
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(void)printf(" | %8.8s %6.6s %6.6s %6.6s %6.6s",
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"OUT", "PACK", "COMP", "UNCOMP", "IP");
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if (vflag)
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(void)printf(" %6.6s %6.6s", "SEARCH", "MISS");
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(void)putchar('\n');
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}
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(void)printf("%8llu %6ld %6u %6u %6u",
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(unsigned long long)V(sc_if.if_ibytes),
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(long)V(sc_if.if_ipackets),
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V(sc_comp.sls_compressedin),
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V(sc_comp.sls_uncompressedin),
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V(sc_comp.sls_errorin));
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if (vflag)
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(void)printf(" %6u %6llu",
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V(sc_comp.sls_tossed),
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(unsigned long long)(V(sc_if.if_ipackets) -
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V(sc_comp.sls_compressedin) -
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V(sc_comp.sls_uncompressedin) -
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V(sc_comp.sls_errorin)));
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(void)printf(" | %8llu %6llu %6u %6u %6llu",
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(unsigned long long)V(sc_if.if_obytes),
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(unsigned long long)V(sc_if.if_opackets),
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V(sc_comp.sls_compressed),
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V(sc_comp.sls_packets) - V(sc_comp.sls_compressed),
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(unsigned long long)(V(sc_if.if_opackets) -
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V(sc_comp.sls_packets)));
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if (vflag)
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(void)printf(" %6u %6u",
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V(sc_comp.sls_searches),
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V(sc_comp.sls_misses));
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(void)putchar('\n');
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fflush(stdout);
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line++;
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oldmask = sigblock(sigmask(SIGALRM));
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if (!signalled)
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sigpause(0);
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sigsetmask(oldmask);
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signalled = 0;
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(void)alarm(interval);
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memmove((char *)osc, (char *)sc, AMT);
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}
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}
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/*
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* Called if an interval expires before sidewaysintpr has completed a loop.
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* Sets a flag to not wait for the alarm.
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*/
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void
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catchalarm(dummy)
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int dummy;
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{
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signalled = 1;
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}
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