usr.sbin/slstat/slstat.c

   1 /*
   2  * print serial line IP statistics:
   3  *      slstat [-i interval] [-v] [interface]
   4  *
   5  * Copyright (c) 1989, 1990, 1991, 1992 Regents of the University of
   6  * California. All rights reserved.
   7  *
   8  * Redistribution and use in source and binary forms are permitted
   9  * provided that the above copyright notice and this paragraph are
  10  * duplicated in all such forms and that any documentation,
  11  * advertising materials, and other materials related to such
  12  * distribution and use acknowledge that the software was developed
  13  * by the University of California, Berkeley.  The name of the
  14  * University may not be used to endorse or promote products derived
  15  * from this software without specific prior written permission.
  16  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
  17  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
  18  * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  19  *
  20  *      Van Jacobson (van@ee.lbl.gov), Dec 31, 1989:
  21  *      - Initial distribution.
  22  *
  23  * $FreeBSD: src/usr.sbin/slstat/slstat.c,v 1.14 1999/08/28 01:20:00 peter Exp $
  24  * $DragonFly: src/usr.sbin/slstat/slstat.c,v 1.5 2004/03/20 17:46:48 cpressey Exp $
  25  */
  26
  27 #define _KERNEL_STRUCTURES
  28 #include <sys/param.h>
  29 #include <sys/mbuf.h>
  30 #include <sys/socket.h>
  31 #include <sys/sysctl.h>
  32 #include <sys/time.h>
  33
  34 #include <ctype.h>
  35 #include <err.h>
  36 #include <errno.h>
  37 #include <signal.h>
  38 #include <stdio.h>
  39 #include <stdlib.h>
  40 #include <string.h>
  41 #include <unistd.h>
  42
  43 #include <net/if.h>
  44 #include <net/if_var.h>
  45 #include <net/if_mib.h>
  46 #include <net/if_types.h>
  47 #include <netinet/in.h>
  48 #include <netinet/in_systm.h>
  49 #include <netinet/ip.h>
  50 #include <net/slcompress.h>
  51 #include <net/sl/if_slvar.h>
  52
  53 static  void usage(void);
  54 static  void intpr(void);
  55 static  void catchalarm(int);
  56
  57 #define INTERFACE_PREFIX        "sl%d"
  58
  59 char    interface[IFNAMSIZ];
  60
  61 int     rflag;
  62 int     vflag;
  63 unsigned interval = 5;
  64 int     unit;
  65 int     name[6];
  66
  67 int
  68 main(int argc, char **argv)
  69 {
  70         int c, i;
  71         size_t len;
  72         int maxifno;
  73         int indx;
  74         struct ifmibdata ifmd;
  75
  76         while ((c = getopt(argc, argv, "vri:")) != -1) {
  77                 switch(c) {
  78                 case 'v':
  79                         ++vflag;
  80                         break;
  81                 case 'r':
  82                         ++rflag;
  83                         break;
  84                 case 'i':
  85                         interval = atoi(optarg);
  86                         if (interval <= 0)
  87                                 usage();
  88                         break;
  89                 default:
  90                         usage();
  91                 }
  92         }
  93         if (optind >= argc)
  94                 sprintf(interface, INTERFACE_PREFIX, unit);
  95         else if (isdigit(argv[optind][0])) {
  96                 unit = atoi(argv[optind]);
  97                 if (unit < 0)
  98                         usage();
  99                 sprintf(interface, INTERFACE_PREFIX, unit);
 100         } else if (strncmp(argv[optind], "sl", 2) == 0
 101                   && isdigit(argv[optind][2])
 102                   && sscanf(argv[optind], "sl%d", &unit) == 1) {
 103                 strncpy(interface, argv[optind], IFNAMSIZ);
 104         } else
 105                 usage();
 106
 107         name[0] = CTL_NET;
 108         name[1] = PF_LINK;
 109         name[2] = NETLINK_GENERIC;
 110         name[3] = IFMIB_SYSTEM;
 111         name[4] = IFMIB_IFCOUNT;
 112         len = sizeof maxifno;
 113         if (sysctl(name, 5, &maxifno, &len, 0, 0) < 0)
 114                 err(1, "sysctl net.link.generic.system.ifcount");
 115
 116         name[3] = IFMIB_IFDATA;
 117         name[5] = IFDATA_GENERAL;
 118         len = sizeof ifmd;
 119         for (i = 1; ; i++) {
 120                 name[4] = i;
 121
 122                 if (sysctl(name, 6, &ifmd, &len, 0, 0) < 0)
 123                         err(1, "sysctl");
 124                 if (strncmp(interface, ifmd.ifmd_name, IFNAMSIZ) == 0
 125                     && ifmd.ifmd_data.ifi_type == IFT_SLIP) {
 126                         indx = i;
 127                         break;
 128                 }
 129                 if (i >= maxifno)
 130                         errx(1, "interface %s does not exist", interface);
 131         }
 132
 133         name[4] = indx;
 134         name[5] = IFDATA_LINKSPECIFIC;
 135         intpr();
 136         exit(0);
 137 }
 138
 139 #define V(offset) ((line % 20)? ((sc->offset - osc->offset) / \
 140                   (rflag ? interval : 1)) : sc->offset)
 141 #define AMT (sizeof(*sc) - 2 * sizeof(sc->sc_comp.tstate))
 142
 143 static void
 144 usage(void)
 145 {
 146         fprintf(stderr, "usage: slstat [-i interval] [-vr] [unit]\n");
 147         exit(1);
 148 }
 149
 150 u_char  signalled;                      /* set if alarm goes off "early" */
 151
 152 /*
 153  * Print a running summary of interface statistics.
 154  * Repeat display every interval seconds, showing statistics
 155  * collected over that interval.  Assumes that interval is non-zero.
 156  * First line printed at top of screen is always cumulative.
 157  */
 158 static void
 159 intpr(void)
 160 {
 161         int line = 0;
 162         int oldmask;
 163         struct sl_softc *sc, *osc;
 164         size_t len;
 165
 166         sc = (struct sl_softc *)malloc(AMT);
 167         osc = (struct sl_softc *)malloc(AMT);
 168         bzero((char *)osc, AMT);
 169         len = AMT;
 170
 171         while (1) {
 172                 if (sysctl(name, 6, sc, &len, 0, 0) < 0 &&
 173                     (errno != ENOMEM || len != AMT))
 174                         err(1, "sysctl linkspecific");
 175
 176                 signal(SIGALRM, catchalarm);
 177                 signalled = 0;
 178                 alarm(interval);
 179
 180                 if ((line % 20) == 0) {
 181                         printf("%8.8s %6.6s %6.6s %6.6s %6.6s",
 182                                 "in", "pack", "comp", "uncomp", "unknwn");
 183                         if (vflag)
 184                                 printf(" %6.6s %6.6s %6.6s",
 185                                        "toss", "other", "err");
 186                         printf(" | %8.8s %6.6s %6.6s %6.6s %6.6s",
 187                                 "out", "pack", "comp", "uncomp", "other");
 188                         if (vflag)
 189                                 printf(" %6.6s %6.6s %6.6s %6.6s",
 190                                        "search", "miss", "err", "coll");
 191                         putchar('\n');
 192                 }
 193                 printf("%8lu %6ld %6u %6u %6u",
 194                         V(sc_if.if_ibytes),
 195                         V(sc_if.if_ipackets),
 196                         V(sc_comp.sls_compressedin),
 197                         V(sc_comp.sls_uncompressedin),
 198                         V(sc_comp.sls_errorin));
 199                 if (vflag)
 200                         printf(" %6u %6lu %6lu",
 201                                 V(sc_comp.sls_tossed),
 202                                 V(sc_if.if_ipackets) -
 203                                   V(sc_comp.sls_compressedin) -
 204                                   V(sc_comp.sls_uncompressedin) -
 205                                   V(sc_comp.sls_errorin),
 206                                V(sc_if.if_ierrors));
 207                 printf(" | %8lu %6ld %6u %6u %6lu",
 208                         V(sc_if.if_obytes) / (rflag ? interval : 1),
 209                         V(sc_if.if_opackets),
 210                         V(sc_comp.sls_compressed),
 211                         V(sc_comp.sls_packets) - V(sc_comp.sls_compressed),
 212                         V(sc_if.if_opackets) - V(sc_comp.sls_packets));
 213                 if (vflag)
 214                         printf(" %6u %6u %6lu %6lu",
 215                                 V(sc_comp.sls_searches),
 216                                 V(sc_comp.sls_misses),
 217                                 V(sc_if.if_oerrors),
 218                                 V(sc_if.if_collisions));
 219                 putchar('\n');
 220                 fflush(stdout);
 221                 line++;
 222                 oldmask = sigblock(sigmask(SIGALRM));
 223                 if (! signalled) {
 224                         sigpause(0);
 225                 }
 226                 sigsetmask(oldmask);
 227                 signalled = 0;
 228                 alarm(interval);
 229                 bcopy((char *)sc, (char *)osc, AMT);
 230         }
 231 }
 232
 233 /*
 234  * Called if an interval expires before sidewaysintpr has completed a loop.
 235  * Sets a flag to not wait for the alarm.
 236  */
 237 static void
 238 catchalarm(int sig)
 239 {
 240         signalled = 1;
 241 }