dist/tcpdump/print-timed.c

   1 /*      $NetBSD$        */
   2
   3 /*
   4  * Copyright (c) 2000 Ben Smithurst <ben@scientia.demon.co.uk>
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that: (1) source code distributions
   9  * retain the above copyright notice and this paragraph in its entirety, (2)
  10  * distributions including binary code include the above copyright notice and
  11  * this paragraph in its entirety in the documentation or other materials
  12  * provided with the distribution, and (3) all advertising materials mentioning
  13  * features or use of this software display the following acknowledgement:
  14  * ``This product includes software developed by the University of California,
  15  * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
  16  * the University nor the names of its contributors may be used to endorse
  17  * or promote products derived from this software without specific prior
  18  * written permission.
  19  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
  20  * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
  21  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  22  */
  23
  24 #include <sys/cdefs.h>
  25 #ifndef lint
  26 #if 0
  27 static const char rcsid[] _U_ =
  28     "@(#) Header: /tcpdump/master/tcpdump/print-timed.c,v 1.9 2003/11/16 09:36:40 guy Exp";
  29 #else
  30 __RCSID("$NetBSD: tcpdump2rcsid.ex,v 1.1 2001/06/25 20:09:58 itojun Exp $");
  31 #endif
  32 #endif
  33
  34 #ifdef HAVE_CONFIG_H
  35 #include "config.h"
  36 #endif
  37
  38 #include <tcpdump-stdinc.h>
  39
  40 #include <stdio.h>
  41 #include <string.h>
  42
  43 #include "timed.h"
  44 #include "interface.h"
  45 #include "extract.h"
  46
  47 static const char *tsptype[TSPTYPENUMBER] =
  48   { "ANY", "ADJTIME", "ACK", "MASTERREQ", "MASTERACK", "SETTIME", "MASTERUP",
  49   "SLAVEUP", "ELECTION", "ACCEPT", "REFUSE", "CONFLICT", "RESOLVE", "QUIT",
  50   "DATE", "DATEREQ", "DATEACK", "TRACEON", "TRACEOFF", "MSITE", "MSITEREQ",
  51   "TEST", "SETDATE", "SETDATEREQ", "LOOP" };
  52
  53 void
  54 timed_print(register const u_char *bp)
  55 {
  56 #define endof(x) ((u_char *)&(x) + sizeof (x))
  57         struct tsp *tsp = (struct tsp *)bp;
  58         long sec, usec;
  59         const u_char *end;
  60
  61         if (endof(tsp->tsp_type) > snapend) {
  62                 fputs("[|timed]", stdout);
  63                 return;
  64         }
  65         if (tsp->tsp_type < TSPTYPENUMBER)
  66                 printf("TSP_%s", tsptype[tsp->tsp_type]);
  67         else
  68                 printf("(tsp_type %#x)", tsp->tsp_type);
  69
  70         if (endof(tsp->tsp_vers) > snapend) {
  71                 fputs(" [|timed]", stdout);
  72                 return;
  73         }
  74         printf(" vers %d", tsp->tsp_vers);
  75
  76         if (endof(tsp->tsp_seq) > snapend) {
  77                 fputs(" [|timed]", stdout);
  78                 return;
  79         }
  80         printf(" seq %d", tsp->tsp_seq);
  81
  82         if (tsp->tsp_type == TSP_LOOP) {
  83                 if (endof(tsp->tsp_hopcnt) > snapend) {
  84                         fputs(" [|timed]", stdout);
  85                         return;
  86                 }
  87                 printf(" hopcnt %d", tsp->tsp_hopcnt);
  88         } else if (tsp->tsp_type == TSP_SETTIME ||
  89           tsp->tsp_type == TSP_ADJTIME ||
  90           tsp->tsp_type == TSP_SETDATE ||
  91           tsp->tsp_type == TSP_SETDATEREQ) {
  92                 if (endof(tsp->tsp_time) > snapend) {
  93                         fputs(" [|timed]", stdout);
  94                         return;
  95                 }
  96                 sec = EXTRACT_32BITS(&tsp->tsp_time.tv_sec);
  97                 usec = EXTRACT_32BITS(&tsp->tsp_time.tv_usec);
  98                 if (usec < 0)
  99                         /* corrupt, skip the rest of the packet */
 100                         return;
 101                 fputs(" time ", stdout);
 102                 if (sec < 0 && usec != 0) {
 103                         sec++;
 104                         if (sec == 0)
 105                                 fputc('-', stdout);
 106                         usec = 1000000 - usec;
 107                 }
 108                 printf("%ld.%06ld", sec, usec);
 109         }
 110
 111         end = memchr(tsp->tsp_name, '\0', snapend - (u_char *)tsp->tsp_name);
 112         if (end == NULL)
 113                 fputs(" [|timed]", stdout);
 114         else {
 115                 fputs(" name ", stdout);
 116                 fwrite(tsp->tsp_name, end - (u_char *)tsp->tsp_name, 1, stdout);
 117         }
 118 }