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 } 153