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