The Tcpdump Group git mirrors - tcpdump/blob - print-timed.c

   1 /*
   2  * Copyright (c) 2000 Ben Smithurst <ben@scientia.demon.co.uk>
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that: (1) source code distributions
   7  * retain the above copyright notice and this paragraph in its entirety, (2)
   8  * distributions including binary code include the above copyright notice and
   9  * this paragraph in its entirety in the documentation or other materials
  10  * provided with the distribution, and (3) all advertising materials mentioning
  11  * features or use of this software display the following acknowledgement:
  12  * ``This product includes software developed by the University of California,
  13  * Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
  14  * the University nor the names of its contributors may be used to endorse
  15  * or promote products derived from this software without specific prior
  16  * written permission.
  17  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
  18  * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
  19  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
  20  */
  21
  22 #ifndef lint
  23 static const char rcsid[] =
  24     "@(#) $Header: /tcpdump/master/tcpdump/print-timed.c,v 1.2 2001-05-09 01:21:43 fenner Exp $";
  25 #endif
  26
  27 #ifdef HAVE_CONFIG_H
  28 #include "config.h"
  29 #endif
  30
  31 #include <sys/param.h>
  32 #include <sys/time.h>
  33 #include <stdio.h>
  34 #include <string.h>
  35
  36 #include "timed.h"
  37 #include "interface.h"
  38
  39 static char *tsptype[TSPTYPENUMBER] =
  40   { "ANY", "ADJTIME", "ACK", "MASTERREQ", "MASTERACK", "SETTIME", "MASTERUP",
  41   "SLAVEUP", "ELECTION", "ACCEPT", "REFUSE", "CONFLICT", "RESOLVE", "QUIT",
  42   "DATE", "DATEREQ", "DATEACK", "TRACEON", "TRACEOFF", "MSITE", "MSITEREQ",
  43   "TEST", "SETDATE", "SETDATEREQ", "LOOP" };
  44
  45 void
  46 timed_print(register const u_char *bp, u_int length)
  47 {
  48 #define endof(x) ((u_char *)&(x) + sizeof (x))
  49         struct tsp *tsp = (struct tsp *)bp;
  50         long sec, usec;
  51         const u_char *end;
  52
  53         if (endof(tsp->tsp_type) > snapend) {
  54                 fputs("[|timed]", stdout);
  55                 return;
  56         }
  57         if (tsp->tsp_type < TSPTYPENUMBER)
  58                 printf("TSP_%s", tsptype[tsp->tsp_type]);
  59         else
  60                 printf("(tsp_type %#x)", tsp->tsp_type);
  61
  62         if (endof(tsp->tsp_vers) > snapend) {
  63                 fputs(" [|timed]", stdout);
  64                 return;
  65         }
  66         printf(" vers %d", tsp->tsp_vers);
  67
  68         if (endof(tsp->tsp_seq) > snapend) {
  69                 fputs(" [|timed]", stdout);
  70                 return;
  71         }
  72         printf(" seq %d", tsp->tsp_seq);
  73
  74         if (tsp->tsp_type == TSP_LOOP) {
  75                 if (endof(tsp->tsp_hopcnt) > snapend) {
  76                         fputs(" [|timed]", stdout);
  77                         return;
  78                 }
  79                 printf(" hopcnt %d", tsp->tsp_hopcnt);
  80         } else if (tsp->tsp_type == TSP_SETTIME ||
  81           tsp->tsp_type == TSP_ADJTIME ||
  82           tsp->tsp_type == TSP_SETDATE ||
  83           tsp->tsp_type == TSP_SETDATEREQ) {
  84                 if (endof(tsp->tsp_time) > snapend) {
  85                         fputs(" [|timed]", stdout);
  86                         return;
  87                 }
  88                 sec = ntohl((long)tsp->tsp_time.tv_sec);
  89                 usec = ntohl((long)tsp->tsp_time.tv_usec);
  90                 if (usec < 0)
  91                         /* corrupt, skip the rest of the packet */
  92                         return;
  93                 fputs(" time ", stdout);
  94                 if (sec < 0 && usec != 0) {
  95                         sec++;
  96                         if (sec == 0)
  97                                 fputc('-', stdout);
  98                         usec = 1000000 - usec;
  99                 }
 100                 printf("%ld.%06ld", sec, usec);
 101         }
 102
 103         end = memchr(tsp->tsp_name, '\0', snapend - (u_char *)tsp->tsp_name);
 104         if (end == NULL)
 105                 fputs(" [|timed]", stdout);
 106         else {
 107                 fputs(" name ", stdout);
 108                 fwrite(tsp->tsp_name, end - (u_char *)tsp->tsp_name, 1, stdout);
 109         }
 110 }