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
  24 #ifndef lint
  25 static const char rcsid[] =
  26   "$FreeBSD: src/usr.sbin/slstat/slstat.c,v 1.14 1999/08/28 01:20:00 peter Exp $";
  27 #endif
  28
  29 #include <sys/param.h>
  30 #include <sys/mbuf.h>
  31 #include <sys/socket.h>
  32 #include <sys/sysctl.h>
  33 #include <sys/time.h>
  34
  35 #include <ctype.h>
  36 #include <err.h>
  37 #include <errno.h>
  38 #include <signal.h>
  39 #include <stdio.h>
  40 #include <stdlib.h>
  41 #include <string.h>
  42 #include <unistd.h>
  43
  44 #include <net/if.h>
  45 #include <net/if_var.h>
  46 #include <net/if_mib.h>
  47 #include <net/if_types.h>
  48 #include <netinet/in.h>
  49 #include <netinet/in_systm.h>
  50 #include <netinet/ip.h>
  51 #include <net/slcompress.h>
  52 #include <net/if_slvar.h>
  53
  54 static  void usage __P((void));
  55 static  void intpr __P((void));
  56 static  void catchalarm __P((int));
  57
  58 #define INTERFACE_PREFIX        "sl%d"
  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(argc, argv)
  69         int argc;
  70         char *argv[];
  71 {
  72         int c, i;
  73         size_t len;
  74         int maxifno;
  75         int indx;
  76         struct ifmibdata ifmd;
  77
  78         while ((c = getopt(argc, argv, "vri:")) != -1) {
  79                 switch(c) {
  80                 case 'v':
  81                         ++vflag;
  82                         break;
  83                 case 'r':
  84                         ++rflag;
  85                         break;
  86                 case 'i':
  87                         interval = atoi(optarg);
  88                         if (interval <= 0)
  89                                 usage();
  90                         break;
  91                 default:
  92                         usage();
  93                 }
  94         }
  95         if (optind >= argc)
  96                 sprintf(interface, INTERFACE_PREFIX, unit);
  97         else if (isdigit(argv[optind][0])) {
  98                 unit = atoi(argv[optind]);
  99                 if (unit < 0)
 100                         usage();
 101                 sprintf(interface, INTERFACE_PREFIX, unit);
 102         } else if (strncmp(argv[optind], "sl", 2) == 0
 103                   && isdigit(argv[optind][2])
 104                   && sscanf(argv[optind], "sl%d", &unit) == 1) {
 105                 strncpy(interface, argv[optind], IFNAMSIZ);
 106         } else
 107                 usage();
 108
 109         name[0] = CTL_NET;
 110         name[1] = PF_LINK;
 111         name[2] = NETLINK_GENERIC;
 112         name[3] = IFMIB_SYSTEM;
 113         name[4] = IFMIB_IFCOUNT;
 114         len = sizeof maxifno;
 115         if (sysctl(name, 5, &maxifno, &len, 0, 0) < 0)
 116                 err(1, "sysctl net.link.generic.system.ifcount");
 117
 118         name[3] = IFMIB_IFDATA;
 119         name[5] = IFDATA_GENERAL;
 120         len = sizeof ifmd;
 121         for (i = 1; ; i++) {
 122                 name[4] = i;
 123
 124                 if (sysctl(name, 6, &ifmd, &len, 0, 0) < 0)
 125                         err(1, "sysctl");
 126                 if (strncmp(interface, ifmd.ifmd_name, IFNAMSIZ) == 0
 127                     && ifmd.ifmd_data.ifi_type == IFT_SLIP) {
 128                         indx = i;
 129                         break;
 130                 }
 131                 if (i >= maxifno)
 132                         errx(1, "interface %s does not exist", interface);
 133         }
 134
 135         name[4] = indx;
 136         name[5] = IFDATA_LINKSPECIFIC;
 137         intpr();
 138         exit(0);
 139 }
 140
 141 #define V(offset) ((line % 20)? ((sc->offset - osc->offset) / \
 142                   (rflag ? interval : 1)) : sc->offset)
 143 #define AMT (sizeof(*sc) - 2 * sizeof(sc->sc_comp.tstate))
 144
 145 static void
 146 usage()
 147 {
 148         fprintf(stderr, "usage: slstat [-i interval] [-vr] [unit]\n");
 149         exit(1);
 150 }
 151
 152 u_char  signalled;                      /* set if alarm goes off "early" */
 153
 154 /*
 155  * Print a running summary of interface statistics.
 156  * Repeat display every interval seconds, showing statistics
 157  * collected over that interval.  Assumes that interval is non-zero.
 158  * First line printed at top of screen is always cumulative.
 159  */
 160 static void
 161 intpr()
 162 {
 163         register int line = 0;
 164         int oldmask;
 165         struct sl_softc *sc, *osc;
 166         size_t len;
 167
 168         sc = (struct sl_softc *)malloc(AMT);
 169         osc = (struct sl_softc *)malloc(AMT);
 170         bzero((char *)osc, AMT);
 171         len = AMT;
 172
 173         while (1) {
 174                 if (sysctl(name, 6, sc, &len, 0, 0) < 0 &&
 175                     (errno != ENOMEM || len != AMT))
 176                         err(1, "sysctl linkspecific");
 177
 178                 (void)signal(SIGALRM, catchalarm);
 179                 signalled = 0;
 180                 (void)alarm(interval);
 181
 182                 if ((line % 20) == 0) {
 183                         printf("%8.8s %6.6s %6.6s %6.6s %6.6s",
 184                                 "in", "pack", "comp", "uncomp", "unknwn");
 185                         if (vflag)
 186                                 printf(" %6.6s %6.6s %6.6s",
 187                                        "toss", "other", "err");
 188                         printf(" | %8.8s %6.6s %6.6s %6.6s %6.6s",
 189                                 "out", "pack", "comp", "uncomp", "other");
 190                         if (vflag)
 191                                 printf(" %6.6s %6.6s %6.6s %6.6s",
 192                                        "search", "miss", "err", "coll");
 193                         putchar('\n');
 194                 }
 195                 printf("%8lu %6ld %6u %6u %6u",
 196                         V(sc_if.if_ibytes),
 197                         V(sc_if.if_ipackets),
 198                         V(sc_comp.sls_compressedin),
 199                         V(sc_comp.sls_uncompressedin),
 200                         V(sc_comp.sls_errorin));
 201                 if (vflag)
 202                         printf(" %6u %6lu %6lu",
 203                                 V(sc_comp.sls_tossed),
 204                                 V(sc_if.if_ipackets) -
 205                                   V(sc_comp.sls_compressedin) -
 206                                   V(sc_comp.sls_uncompressedin) -
 207                                   V(sc_comp.sls_errorin),
 208                                V(sc_if.if_ierrors));
 209                 printf(" | %8lu %6ld %6u %6u %6lu",
 210                         V(sc_if.if_obytes) / (rflag ? interval : 1),
 211                         V(sc_if.if_opackets),
 212                         V(sc_comp.sls_compressed),
 213                         V(sc_comp.sls_packets) - V(sc_comp.sls_compressed),
 214                         V(sc_if.if_opackets) - V(sc_comp.sls_packets));
 215                 if (vflag)
 216                         printf(" %6u %6u %6lu %6lu",
 217                                 V(sc_comp.sls_searches),
 218                                 V(sc_comp.sls_misses),
 219                                 V(sc_if.if_oerrors),
 220                                 V(sc_if.if_collisions));
 221                 putchar('\n');
 222                 fflush(stdout);
 223                 line++;
 224                 oldmask = sigblock(sigmask(SIGALRM));
 225                 if (! signalled) {
 226                         sigpause(0);
 227                 }
 228                 sigsetmask(oldmask);
 229                 signalled = 0;
 230                 (void)alarm(interval);
 231                 bcopy((char *)sc, (char *)osc, AMT);
 232         }
 233 }
 234
 235 /*
 236  * Called if an interval expires before sidewaysintpr has completed a loop.
 237  * Sets a flag to not wait for the alarm.
 238  */
 239 static void
 240 catchalarm(sig)
 241         int sig;
 242 {
 243         signalled = 1;
 244 }