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 #include <sys/cdefs.h>
  25 __FBSDID("$FreeBSD$");
  26
  27 #include <sys/param.h>
  28 #include <sys/socket.h>
  29 #include <sys/sysctl.h>
  30 #include <sys/time.h>
  31
  32 #include <ctype.h>
  33 #include <err.h>
  34 #include <errno.h>
  35 #include <signal.h>
  36 #include <stdio.h>
  37 #include <stdlib.h>
  38 #include <string.h>
  39 #include <unistd.h>
  40
  41 #include <net/if.h>
  42 #include <net/if_var.h>
  43 #include <net/if_mib.h>
  44 #include <net/if_types.h>
  45 #include <netinet/in.h>
  46 #include <netinet/in_systm.h>
  47 #include <netinet/ip.h>
  48 #include <net/slcompress.h>
  49 #include <net/if_slvar.h>
  50
  51 static  void usage(void);
  52 static  void intpr(void);
  53 static  void catchalarm(int);
  54
  55 #define INTERFACE_PREFIX        "sl%d"
  56 char    interface[IFNAMSIZ];
  57
  58 int     rflag;
  59 int     vflag;
  60 unsigned interval = 5;
  61 int     unit;
  62 int     name[6];
  63
  64 int
  65 main(int argc, char *argv[])
  66 {
  67         int c, i;
  68         size_t len;
  69         int maxifno;
  70         int indx;
  71         struct ifmibdata ifmd;
  72
  73         while ((c = getopt(argc, argv, "vri:")) != -1) {
  74                 switch(c) {
  75                 case 'v':
  76                         ++vflag;
  77                         break;
  78                 case 'r':
  79                         ++rflag;
  80                         break;
  81                 case 'i':
  82                         interval = atoi(optarg);
  83                         if (interval <= 0)
  84                                 usage();
  85                         break;
  86                 default:
  87                         usage();
  88                 }
  89         }
  90         if (optind >= argc)
  91                 sprintf(interface, INTERFACE_PREFIX, unit);
  92         else if (isdigit(argv[optind][0])) {
  93                 unit = atoi(argv[optind]);
  94                 if (unit < 0)
  95                         usage();
  96                 sprintf(interface, INTERFACE_PREFIX, unit);
  97         } else if (strncmp(argv[optind], "sl", 2) == 0
  98                   && isdigit(argv[optind][2])
  99                   && sscanf(argv[optind], "sl%d", &unit) == 1) {
 100                 strncpy(interface, argv[optind], IFNAMSIZ);
 101         } else
 102                 usage();
 103
 104         name[0] = CTL_NET;
 105         name[1] = PF_LINK;
 106         name[2] = NETLINK_GENERIC;
 107         name[3] = IFMIB_SYSTEM;
 108         name[4] = IFMIB_IFCOUNT;
 109         len = sizeof maxifno;
 110         if (sysctl(name, 5, &maxifno, &len, 0, 0) < 0)
 111                 err(1, "sysctl net.link.generic.system.ifcount");
 112
 113         name[3] = IFMIB_IFDATA;
 114         name[5] = IFDATA_GENERAL;
 115         len = sizeof ifmd;
 116         for (i = 1; ; i++) {
 117                 name[4] = i;
 118
 119                 if (sysctl(name, 6, &ifmd, &len, 0, 0) < 0) {
 120                         if (errno == ENOENT)
 121                                 continue;
 122
 123                         err(1, "sysctl");
 124                 }
 125                 if (strncmp(interface, ifmd.ifmd_name, IFNAMSIZ) == 0
 126                     && ifmd.ifmd_data.ifi_type == IFT_SLIP) {
 127                         indx = i;
 128                         break;
 129                 }
 130                 if (i >= maxifno)
 131                         errx(1, "interface %s does not exist", interface);
 132         }
 133
 134         name[4] = indx;
 135         name[5] = IFDATA_LINKSPECIFIC;
 136         intpr();
 137         exit(0);
 138 }
 139
 140 #define V(offset) ((line % 20)? ((sc->offset - osc->offset) / \
 141                   (rflag ? interval : 1)) : sc->offset)
 142 #define AMT (sizeof(*sc) - 2 * sizeof(sc->sc_comp.tstate))
 143
 144 static void
 145 usage()
 146 {
 147         fprintf(stderr, "usage: slstat [-i interval] [-vr] [unit]\n");
 148         exit(1);
 149 }
 150
 151 u_char  signalled;                      /* set if alarm goes off "early" */
 152
 153 /*
 154  * Print a running summary of interface statistics.
 155  * Repeat display every interval seconds, showing statistics
 156  * collected over that interval.  Assumes that interval is non-zero.
 157  * First line printed at top of screen is always cumulative.
 158  */
 159 static void
 160 intpr()
 161 {
 162         register int line = 0;
 163         int oldmask;
 164         struct sl_softc *sc, *osc;
 165         size_t len;
 166
 167         sc = (struct sl_softc *)malloc(AMT);
 168         osc = (struct sl_softc *)malloc(AMT);
 169         bzero((char *)osc, AMT);
 170         len = AMT;
 171
 172         while (1) {
 173                 if (sysctl(name, 6, sc, &len, 0, 0) < 0 &&
 174                     (errno != ENOMEM || len != AMT))
 175                         err(1, "sysctl linkspecific");
 176
 177                 (void)signal(SIGALRM, catchalarm);
 178                 signalled = 0;
 179                 (void)alarm(interval);
 180
 181                 if ((line % 20) == 0) {
 182                         printf("%8.8s %6.6s %6.6s %6.6s %6.6s",
 183                                 "in", "pack", "comp", "uncomp", "unknwn");
 184                         if (vflag)
 185                                 printf(" %6.6s %6.6s %6.6s",
 186                                        "toss", "other", "err");
 187                         printf(" | %8.8s %6.6s %6.6s %6.6s %6.6s",
 188                                 "out", "pack", "comp", "uncomp", "other");
 189                         if (vflag)
 190                                 printf(" %6.6s %6.6s %6.6s %6.6s",
 191                                        "search", "miss", "err", "coll");
 192                         putchar('\n');
 193                 }
 194                 printf("%8lu %6ld %6u %6u %6u",
 195                         V(sc_ifp->if_ibytes),
 196                         V(sc_ifp->if_ipackets),
 197                         V(sc_comp.sls_compressedin),
 198                         V(sc_comp.sls_uncompressedin),
 199                         V(sc_comp.sls_errorin));
 200                 if (vflag)
 201                         printf(" %6u %6lu %6lu",
 202                                 V(sc_comp.sls_tossed),
 203                                 V(sc_ifp->if_ipackets) -
 204                                   V(sc_comp.sls_compressedin) -
 205                                   V(sc_comp.sls_uncompressedin) -
 206                                   V(sc_comp.sls_errorin),
 207                                V(sc_ifp->if_ierrors));
 208                 printf(" | %8lu %6ld %6u %6u %6lu",
 209                         V(sc_ifp->if_obytes) / (rflag ? interval : 1),
 210                         V(sc_ifp->if_opackets),
 211                         V(sc_comp.sls_compressed),
 212                         V(sc_comp.sls_packets) - V(sc_comp.sls_compressed),
 213                         V(sc_ifp->if_opackets) - V(sc_comp.sls_packets));
 214                 if (vflag)
 215                         printf(" %6u %6u %6lu %6lu",
 216                                 V(sc_comp.sls_searches),
 217                                 V(sc_comp.sls_misses),
 218                                 V(sc_ifp->if_oerrors),
 219                                 V(sc_ifp->if_collisions));
 220                 putchar('\n');
 221                 fflush(stdout);
 222                 line++;
 223                 oldmask = sigblock(sigmask(SIGALRM));
 224                 if (! signalled) {
 225                         sigpause(0);
 226                 }
 227                 sigsetmask(oldmask);
 228                 signalled = 0;
 229                 (void)alarm(interval);
 230                 bcopy((char *)sc, (char *)osc, AMT);
 231         }
 232 }
 233
 234 /*
 235  * Called if an interval expires before sidewaysintpr has completed a loop.
 236  * Sets a flag to not wait for the alarm.
 237  */
 238 static void
 239 catchalarm(sig)
 240         int sig __unused;
 241 {
 242         signalled = 1;
 243 }