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   "$FreeBSD$";
  27 #endif
  28
  29 #include <sys/param.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/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 char    interface[IFNAMSIZ];
  59
  60 int     rflag;
  61 int     vflag;
  62 unsigned interval = 5;
  63 int     unit;
  64 int     name[6];
  65
  66 int
  67 main(int argc, char *argv[])
  68 {
  69         int c, i;
  70         size_t len;
  71         int maxifno;
  72         int indx;
  73         struct ifmibdata ifmd;
  74
  75         while ((c = getopt(argc, argv, "vri:")) != -1) {
  76                 switch(c) {
  77                 case 'v':
  78                         ++vflag;
  79                         break;
  80                 case 'r':
  81                         ++rflag;
  82                         break;
  83                 case 'i':
  84                         interval = atoi(optarg);
  85                         if (interval <= 0)
  86                                 usage();
  87                         break;
  88                 default:
  89                         usage();
  90                 }
  91         }
  92         if (optind >= argc)
  93                 sprintf(interface, INTERFACE_PREFIX, unit);
  94         else if (isdigit(argv[optind][0])) {
  95                 unit = atoi(argv[optind]);
  96                 if (unit < 0)
  97                         usage();
  98                 sprintf(interface, INTERFACE_PREFIX, unit);
  99         } else if (strncmp(argv[optind], "sl", 2) == 0
 100                   && isdigit(argv[optind][2])
 101                   && sscanf(argv[optind], "sl%d", &unit) == 1) {
 102                 strncpy(interface, argv[optind], IFNAMSIZ);
 103         } else
 104                 usage();
 105
 106         name[0] = CTL_NET;
 107         name[1] = PF_LINK;
 108         name[2] = NETLINK_GENERIC;
 109         name[3] = IFMIB_SYSTEM;
 110         name[4] = IFMIB_IFCOUNT;
 111         len = sizeof maxifno;
 112         if (sysctl(name, 5, &maxifno, &len, 0, 0) < 0)
 113                 err(1, "sysctl net.link.generic.system.ifcount");
 114
 115         name[3] = IFMIB_IFDATA;
 116         name[5] = IFDATA_GENERAL;
 117         len = sizeof ifmd;
 118         for (i = 1; ; i++) {
 119                 name[4] = i;
 120
 121                 if (sysctl(name, 6, &ifmd, &len, 0, 0) < 0) {
 122                         if (errno == ENOENT)
 123                                 continue;
 124
 125                         err(1, "sysctl");
 126                 }
 127                 if (strncmp(interface, ifmd.ifmd_name, IFNAMSIZ) == 0
 128                     && ifmd.ifmd_data.ifi_type == IFT_SLIP) {
 129                         indx = i;
 130                         break;
 131                 }
 132                 if (i >= maxifno)
 133                         errx(1, "interface %s does not exist", interface);
 134         }
 135
 136         name[4] = indx;
 137         name[5] = IFDATA_LINKSPECIFIC;
 138         intpr();
 139         exit(0);
 140 }
 141
 142 #define V(offset) ((line % 20)? ((sc->offset - osc->offset) / \
 143                   (rflag ? interval : 1)) : sc->offset)
 144 #define AMT (sizeof(*sc) - 2 * sizeof(sc->sc_comp.tstate))
 145
 146 static void
 147 usage()
 148 {
 149         fprintf(stderr, "usage: slstat [-i interval] [-vr] [unit]\n");
 150         exit(1);
 151 }
 152
 153 u_char  signalled;                      /* set if alarm goes off "early" */
 154
 155 /*
 156  * Print a running summary of interface statistics.
 157  * Repeat display every interval seconds, showing statistics
 158  * collected over that interval.  Assumes that interval is non-zero.
 159  * First line printed at top of screen is always cumulative.
 160  */
 161 static void
 162 intpr()
 163 {
 164         register int line = 0;
 165         int oldmask;
 166         struct sl_softc *sc, *osc;
 167         size_t len;
 168
 169         sc = (struct sl_softc *)malloc(AMT);
 170         osc = (struct sl_softc *)malloc(AMT);
 171         bzero((char *)osc, AMT);
 172         len = AMT;
 173
 174         while (1) {
 175                 if (sysctl(name, 6, sc, &len, 0, 0) < 0 &&
 176                     (errno != ENOMEM || len != AMT))
 177                         err(1, "sysctl linkspecific");
 178
 179                 (void)signal(SIGALRM, catchalarm);
 180                 signalled = 0;
 181                 (void)alarm(interval);
 182
 183                 if ((line % 20) == 0) {
 184                         printf("%8.8s %6.6s %6.6s %6.6s %6.6s",
 185                                 "in", "pack", "comp", "uncomp", "unknwn");
 186                         if (vflag)
 187                                 printf(" %6.6s %6.6s %6.6s",
 188                                        "toss", "other", "err");
 189                         printf(" | %8.8s %6.6s %6.6s %6.6s %6.6s",
 190                                 "out", "pack", "comp", "uncomp", "other");
 191                         if (vflag)
 192                                 printf(" %6.6s %6.6s %6.6s %6.6s",
 193                                        "search", "miss", "err", "coll");
 194                         putchar('\n');
 195                 }
 196                 printf("%8lu %6ld %6u %6u %6u",
 197                         V(sc_if.if_ibytes),
 198                         V(sc_if.if_ipackets),
 199                         V(sc_comp.sls_compressedin),
 200                         V(sc_comp.sls_uncompressedin),
 201                         V(sc_comp.sls_errorin));
 202                 if (vflag)
 203                         printf(" %6u %6lu %6lu",
 204                                 V(sc_comp.sls_tossed),
 205                                 V(sc_if.if_ipackets) -
 206                                   V(sc_comp.sls_compressedin) -
 207                                   V(sc_comp.sls_uncompressedin) -
 208                                   V(sc_comp.sls_errorin),
 209                                V(sc_if.if_ierrors));
 210                 printf(" | %8lu %6ld %6u %6u %6lu",
 211                         V(sc_if.if_obytes) / (rflag ? interval : 1),
 212                         V(sc_if.if_opackets),
 213                         V(sc_comp.sls_compressed),
 214                         V(sc_comp.sls_packets) - V(sc_comp.sls_compressed),
 215                         V(sc_if.if_opackets) - V(sc_comp.sls_packets));
 216                 if (vflag)
 217                         printf(" %6u %6u %6lu %6lu",
 218                                 V(sc_comp.sls_searches),
 219                                 V(sc_comp.sls_misses),
 220                                 V(sc_if.if_oerrors),
 221                                 V(sc_if.if_collisions));
 222                 putchar('\n');
 223                 fflush(stdout);
 224                 line++;
 225                 oldmask = sigblock(sigmask(SIGALRM));
 226                 if (! signalled) {
 227                         sigpause(0);
 228                 }
 229                 sigsetmask(oldmask);
 230                 signalled = 0;
 231                 (void)alarm(interval);
 232                 bcopy((char *)sc, (char *)osc, AMT);
 233         }
 234 }
 235
 236 /*
 237  * Called if an interval expires before sidewaysintpr has completed a loop.
 238  * Sets a flag to not wait for the alarm.
 239  */
 240 static void
 241 catchalarm(sig)
 242         int sig __unused;
 243 {
 244         signalled = 1;
 245 }