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