usr.sbin/pppstats/pppstats.c

/*
 * print PPP statistics:
 *      pppstats [-i interval] [-v] [interface] [system] [core]
 *
 *      Brad Parker (brad@cayman.com) 6/92
 *
 * from the original "slstats" by Van Jaconson
 *
 * Copyright (c) 1989 Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms are permitted
 * provided that the above copyright notice and this paragraph are
 * duplicated in all such forms and that any documentation,
 * advertising materials, and other materials related to such
 * distribution and use acknowledge that the software was developed
 * by the University of California, Berkeley.  The name of the
 * University may not be used to endorse or promote products derived
 * from this software without specific prior written permission.
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 *
 *      Van Jacobson (van@helios.ee.lbl.gov), Dec 31, 1989:
 *      - Initial distribution.
 */

#include <sys/param.h>
#include <sys/mbuf.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/file.h>
#ifndef KVMLIB
#include <machine/pte.h>
#endif
#ifdef sun
#include <kvm.h>
#endif
#include <ctype.h>
#include <errno.h>
#include <nlist.h>
#include <stdio.h>
#include <signal.h>
#include <net/if.h>
#include <netinet/in.h>
#include <netinet/in_systm.h>
#include <netinet/ip.h>
#include <netinet/ip_var.h>

#define VJC     1
#include <net/slcompress.h>
#include <net/if_ppp.h>

#ifdef STREAMS
#include <sys/stream.h>
#include "ppp_str.h"
#endif

#ifdef STREAMS
struct nlist nl[] = {
#define N_SOFTC 0
        { "_pii" },
        "",
};
#else
struct nlist nl[] = {
#define N_SOFTC 0
        { "_ppp_softc" },
        "",
};
#endif

#ifndef KVMLIB
struct  pte *Sysmap;
int     kmem;
extern  off_t lseek();
#endif

#ifdef sun
kvm_t   *kd;
#endif

#ifdef sun
char    *system = "/vmunix";
#else
char    *system = "/386bsd";
#endif

#ifndef KVMLIB
char    *kmemf = "/dev/kmem";
#else
char    *kmemf;
#endif
int     kflag;
int     vflag;
unsigned interval = 5;
int     unit;

extern  char *malloc();


main(argc, argv)
        int argc;
        char *argv[];
{
        --argc; ++argv;
        while (argc > 0) {
                if (strcmp(argv[0], "-v") == 0) {
                        ++vflag;
                        ++argv, --argc;
                        continue;
                }
                if (strcmp(argv[0], "-i") == 0 && argv[1] &&
                    isdigit(argv[1][0])) {
                        interval = atoi(argv[1]);
                        if (interval <= 0)
                                usage();
                        ++argv, --argc;
                        ++argv, --argc;
                        continue;
                }
                if (isdigit(argv[0][0])) {
                        unit = atoi(argv[0]);
                        if (unit < 0)
                                usage();
                        ++argv, --argc;
                        continue;
                }
                if (kflag)
                        usage();

                system = *argv;
                ++argv, --argc;
                if (argc > 0) {
                        kmemf = *argv++;
                        --argc;
                        kflag++;
                }
        }
#ifndef KVMLIB
        if (nlist(system, nl) < 0 || nl[0].n_type == 0) {
                fprintf(stderr, "%s: no namelist\n", system);
                exit(1);
        }
        kmem = open(kmemf, O_RDONLY);
        if (kmem < 0) {
                perror(kmemf);
                exit(1);
        }
        if (kflag) {
                off_t off;

                Sysmap = (struct pte *)
                   malloc((u_int)(nl[N_SYSSIZE].n_value * sizeof(struct pte)));
                if (!Sysmap) {
                        fputs("netstat: can't get memory for Sysmap.\n", stderr);
                        exit(1);
                }
                off = nl[N_SYSMAP].n_value & ~KERNBASE;
                (void)lseek(kmem, off, L_SET);
                (void)read(kmem, (char *)Sysmap,
                    (int)(nl[N_SYSSIZE].n_value * sizeof(struct pte)));
        }
#else
#ifdef sun
        /* SunOS */
        if ((kd = kvm_open(system, kmemf, (char *)0, O_RDONLY, NULL)) == NULL) {
          perror("kvm_open");
          exit(1);
        }
#else
        /* BSD4.3+ */
        if (kvm_openfiles(system, kmemf, (char *)0) == -1) {
          fprintf(stderr, "kvm_openfiles: %s", kvm_geterr());
          exit(1);
        }
#endif

#ifdef sun
        if (kvm_nlist(kd, nl)) {
#else
        if (kvm_nlist(nl)) {
#endif
          fprintf(stderr, "pppstats: can't find symbols in nlist\n");
          exit(1);
        }
#endif
        intpr();
        exit(0);
}

#ifndef KVMLIB
/*
 * Seek into the kernel for a value.
 */
off_t
klseek(fd, base, off)
        int fd, off;
        off_t base;
{
        if (kflag) {
                /* get kernel pte */
                base &= ~KERNBASE;
                base = ctob(Sysmap[btop(base)].pg_pfnum) + (base & PGOFSET);
        }
        return (lseek(fd, base, off));
}
#endif

usage()
{
        fprintf(stderr,"usage: pppstats [-i interval] [-v] [unit] [system] [core]\n");
        exit(1);
}

u_char  signalled;                      /* set if alarm goes off "early" */

#define V(offset) ((line % 20)? sc->offset - osc->offset : sc->offset)

/*
 * 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.
 */
intpr()
{
        register int line = 0;
        int oldmask;
#ifdef __STDC__
        void catchalarm(int);
#else
        void catchalarm();
#endif

#ifdef STREAMS
#define STRUCT struct ppp_if_info
#else
#define STRUCT struct ppp_softc
#endif

        STRUCT *sc, *osc;

        nl[N_SOFTC].n_value += unit * sizeof(struct ppp_softc);
        sc = (STRUCT *)malloc(sizeof(STRUCT));
        osc = (STRUCT *)malloc(sizeof(STRUCT));

        bzero((char *)osc, sizeof(STRUCT));

        while (1) {
#ifndef KVMLIB
                if (klseek(kmem, (off_t)nl[N_SOFTC].n_value, 0) < 0)
                        if(errno != EINTR)
                                perror("kmem seek");
                if (read(kmem, (char *)sc, sizeof(STRUCT)) <= 0)
                        perror("kmem read");
#else
#ifdef sun
                if (kvm_read(kd, nl[N_SOFTC].n_value,
#else
                if (kvm_read(nl[N_SOFTC].n_value,
#endif
                             sc, sizeof(STRUCT)) !=
                    sizeof(STRUCT))
                  perror("kvm_read");
#endif

                (void)signal(SIGALRM, catchalarm);
                signalled = 0;
                (void)alarm(interval);

                if ((line % 20) == 0) {
                        printf("%6.6s %6.6s %6.6s %6.6s %6.6s",
                                "in", "pack", "comp", "uncomp", "err");
                        if (vflag)
                                printf(" %6.6s %6.6s", "toss", "ip");
                        printf(" | %6.6s %6.6s %6.6s %6.6s %6.6s",
                                "out", "pack", "comp", "uncomp", "ip");
                        if (vflag)
                                printf(" %6.6s %6.6s", "search", "miss");
                        putchar('\n');
                }

#ifdef STREAMS
#define COMP    pii_sc_comp
#define STATS   pii_ifnet
#else
#define COMP    sc_comp
#define STATS   sc_if
#endif

                printf("%6d %6d %6d %6d %6d",
#if BSD > 43
                        V(STATS.if_ibytes),
#else
                        0,
#endif
                        V(STATS.if_ipackets),
                        V(COMP.sls_compressedin),
                        V(COMP.sls_uncompressedin),
                        V(COMP.sls_errorin));
                if (vflag)
                        printf(" %6d %6d",
                                V(COMP.sls_tossed),
                                V(STATS.if_ipackets) -
                                  V(COMP.sls_compressedin) -
                                  V(COMP.sls_uncompressedin) -
                                  V(COMP.sls_errorin));
                printf(" | %6d %6d %6d %6d %6d",
#if BSD > 43
                        V(STATS.if_obytes),
#else
                        0,
#endif
                        V(STATS.if_opackets),
                        V(COMP.sls_compressed),
                        V(COMP.sls_packets) - V(COMP.sls_compressed),
                        V(STATS.if_opackets) - V(COMP.sls_packets));
                if (vflag)
                        printf(" %6d %6d",
                                V(COMP.sls_searches),
                                V(COMP.sls_misses));

                putchar('\n');
                fflush(stdout);
                line++;
                oldmask = sigblock(sigmask(SIGALRM));
                if (! signalled) {
                        sigpause(0);
                }
                sigsetmask(oldmask);
                signalled = 0;
                (void)alarm(interval);
                bcopy((char *)sc, (char *)osc, sizeof(STRUCT));
        }
}

/*
 * Called if an interval expires before sidewaysintpr has completed a loop.
 * Sets a flag to not wait for the alarm.
 */
void catchalarm(arg)
int arg;
{
        signalled = 1;
}