external/bsd/tcpdump/dist/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 #include <sys/cdefs.h>
  23 #ifndef lint
  24 __RCSID("$NetBSD: print-timed.c,v 1.4 2014/11/20 03:05:03 christos Exp $");
  25 #endif
  26
  27 #define NETDISSECT_REWORKED
  28 #ifdef HAVE_CONFIG_H
  29 #include "config.h"
  30 #endif
  31
  32 #include <tcpdump-stdinc.h>
  33
  34 #include "interface.h"
  35 #include "extract.h"
  36
  37 /*
  38  * Time Synchronization Protocol
  39  */
  40
  41 struct tsp_timeval {
  42         uint32_t        tv_sec;
  43         uint32_t        tv_usec;
  44 };
  45
  46 struct tsp {
  47         uint8_t         tsp_type;
  48         uint8_t         tsp_vers;
  49         uint16_t        tsp_seq;
  50         union {
  51                 struct tsp_timeval tspu_time;
  52                 int8_t tspu_hopcnt;
  53         } tsp_u;
  54         int8_t tsp_name[256];
  55 };
  56
  57 #define tsp_time        tsp_u.tspu_time
  58 #define tsp_hopcnt      tsp_u.tspu_hopcnt
  59
  60 /*
  61  * Command types.
  62  */
  63 #define TSP_ANY                 0       /* match any types */
  64 #define TSP_ADJTIME             1       /* send adjtime */
  65 #define TSP_ACK                 2       /* generic acknowledgement */
  66 #define TSP_MASTERREQ           3       /* ask for master's name */
  67 #define TSP_MASTERACK           4       /* acknowledge master request */
  68 #define TSP_SETTIME             5       /* send network time */
  69 #define TSP_MASTERUP            6       /* inform slaves that master is up */
  70 #define TSP_SLAVEUP             7       /* slave is up but not polled */
  71 #define TSP_ELECTION            8       /* advance candidature for master */
  72 #define TSP_ACCEPT              9       /* support candidature of master */
  73 #define TSP_REFUSE              10      /* reject candidature of master */
  74 #define TSP_CONFLICT            11      /* two or more masters present */
  75 #define TSP_RESOLVE             12      /* masters' conflict resolution */
  76 #define TSP_QUIT                13      /* reject candidature if master is up */
  77 #define TSP_DATE                14      /* reset the time (date command) */
  78 #define TSP_DATEREQ             15      /* remote request to reset the time */
  79 #define TSP_DATEACK             16      /* acknowledge time setting  */
  80 #define TSP_TRACEON             17      /* turn tracing on */
  81 #define TSP_TRACEOFF            18      /* turn tracing off */
  82 #define TSP_MSITE               19      /* find out master's site */
  83 #define TSP_MSITEREQ            20      /* remote master's site request */
  84 #define TSP_TEST                21      /* for testing election algo */
  85 #define TSP_SETDATE             22      /* New from date command */
  86 #define TSP_SETDATEREQ          23      /* New remote for above */
  87 #define TSP_LOOP                24      /* loop detection packet */
  88
  89 #define TSPTYPENUMBER           25
  90
  91 static const char tstr[] = "[|timed]";
  92
  93 static const char *tsptype[TSPTYPENUMBER] =
  94   { "ANY", "ADJTIME", "ACK", "MASTERREQ", "MASTERACK", "SETTIME", "MASTERUP",
  95   "SLAVEUP", "ELECTION", "ACCEPT", "REFUSE", "CONFLICT", "RESOLVE", "QUIT",
  96   "DATE", "DATEREQ", "DATEACK", "TRACEON", "TRACEOFF", "MSITE", "MSITEREQ",
  97   "TEST", "SETDATE", "SETDATEREQ", "LOOP" };
  98
  99 void
 100 timed_print(netdissect_options *ndo,
 101             register const u_char *bp)
 102 {
 103         struct tsp *tsp = (struct tsp *)bp;
 104         long sec, usec;
 105
 106         ND_TCHECK(tsp->tsp_type);
 107         if (tsp->tsp_type < TSPTYPENUMBER)
 108                 ND_PRINT((ndo, "TSP_%s", tsptype[tsp->tsp_type]));
 109         else
 110                 ND_PRINT((ndo, "(tsp_type %#x)", tsp->tsp_type));
 111
 112         ND_TCHECK(tsp->tsp_vers);
 113         ND_PRINT((ndo, " vers %u", tsp->tsp_vers));
 114
 115         ND_TCHECK(tsp->tsp_seq);
 116         ND_PRINT((ndo, " seq %u", tsp->tsp_seq));
 117
 118         switch (tsp->tsp_type) {
 119         case TSP_LOOP:
 120                 ND_TCHECK(tsp->tsp_hopcnt);
 121                 ND_PRINT((ndo, " hopcnt %u", tsp->tsp_hopcnt));
 122                 break;
 123         case TSP_SETTIME:
 124         case TSP_ADJTIME:
 125         case TSP_SETDATE:
 126         case TSP_SETDATEREQ:
 127                 ND_TCHECK(tsp->tsp_time);
 128                 sec = EXTRACT_32BITS(&tsp->tsp_time.tv_sec);
 129                 usec = EXTRACT_32BITS(&tsp->tsp_time.tv_usec);
 130                 /* XXX The comparison below is always false? */
 131                 if (usec < 0)
 132                         /* corrupt, skip the rest of the packet */
 133                         return;
 134                 ND_PRINT((ndo, " time "));
 135                 if (sec < 0 && usec != 0) {
 136                         sec++;
 137                         if (sec == 0)
 138                                 ND_PRINT((ndo, "-"));
 139                         usec = 1000000 - usec;
 140                 }
 141                 ND_PRINT((ndo, "%ld.%06ld", sec, usec));
 142                 break;
 143         }
 144         ND_TCHECK(tsp->tsp_name);
 145         ND_PRINT((ndo, " name "));
 146         if (fn_print(ndo, (u_char *)tsp->tsp_name, (u_char *)tsp->tsp_name + sizeof(tsp->tsp_name)))
 147                 goto trunc;
 148         return;
 149
 150 trunc:
 151         ND_PRINT((ndo, " %s", tstr));
 152 }