1 /* 2 * Copyright (c) 2000 Ben Smithurst <ben (at) 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 1.9 2024/09/02 16:15:33 christos Exp $"); 25 #endif 26 27 /* \summary: Berkeley UNIX Time Synchronization Protocol */ 28 29 /* specification: https://docs.freebsd.org/44doc/smm/12.timed/paper.pdf */ 30 31 #include <config.h> 32 33 #include "netdissect-stdinc.h" 34 35 #include "netdissect.h" 36 #include "extract.h" 37 38 struct tsp_timeval { 39 nd_int32_t tv_sec; 40 nd_int32_t tv_usec; 41 }; 42 43 struct tsp { 44 nd_uint8_t tsp_type; 45 nd_uint8_t tsp_vers; 46 nd_uint16_t tsp_seq; 47 union { 48 struct tsp_timeval tspu_time; 49 nd_int8_t tspu_hopcnt; 50 } tsp_u; 51 nd_byte tsp_name[256]; /* null-terminated string up to 256 */ 52 }; 53 54 #define tsp_time tsp_u.tspu_time 55 #define tsp_hopcnt tsp_u.tspu_hopcnt 56 57 /* 58 * Command types. 59 */ 60 #define TSP_ANY 0 /* match any types */ 61 #define TSP_ADJTIME 1 /* send adjtime */ 62 #define TSP_ACK 2 /* generic acknowledgement */ 63 #define TSP_MASTERREQ 3 /* ask for master's name */ 64 #define TSP_MASTERACK 4 /* acknowledge master request */ 65 #define TSP_SETTIME 5 /* send network time */ 66 #define TSP_MASTERUP 6 /* inform slaves that master is up */ 67 #define TSP_SLAVEUP 7 /* slave is up but not polled */ 68 #define TSP_ELECTION 8 /* advance candidature for master */ 69 #define TSP_ACCEPT 9 /* support candidature of master */ 70 #define TSP_REFUSE 10 /* reject candidature of master */ 71 #define TSP_CONFLICT 11 /* two or more masters present */ 72 #define TSP_RESOLVE 12 /* masters' conflict resolution */ 73 #define TSP_QUIT 13 /* reject candidature if master is up */ 74 #define TSP_DATE 14 /* reset the time (date command) */ 75 #define TSP_DATEREQ 15 /* remote request to reset the time */ 76 #define TSP_DATEACK 16 /* acknowledge time setting */ 77 #define TSP_TRACEON 17 /* turn tracing on */ 78 #define TSP_TRACEOFF 18 /* turn tracing off */ 79 #define TSP_MSITE 19 /* find out master's site */ 80 #define TSP_MSITEREQ 20 /* remote master's site request */ 81 #define TSP_TEST 21 /* for testing election algo */ 82 #define TSP_SETDATE 22 /* New from date command */ 83 #define TSP_SETDATEREQ 23 /* New remote for above */ 84 #define TSP_LOOP 24 /* loop detection packet */ 85 static const struct tok tsptype_str[] = { 86 { TSP_ANY, "TSP_ANY" }, 87 { TSP_ADJTIME, "TSP_ADJTIME" }, 88 { TSP_ACK, "TSP_ACK" }, 89 { TSP_MASTERREQ, "TSP_MASTERREQ" }, 90 { TSP_MASTERACK, "TSP_MASTERACK" }, 91 { TSP_SETTIME, "TSP_SETTIME" }, 92 { TSP_MASTERUP, "TSP_MASTERUP" }, 93 { TSP_SLAVEUP, "TSP_SLAVEUP" }, 94 { TSP_ELECTION, "TSP_ELECTION" }, 95 { TSP_ACCEPT, "TSP_ACCEPT" }, 96 { TSP_REFUSE, "TSP_REFUSE" }, 97 { TSP_CONFLICT, "TSP_CONFLICT" }, 98 { TSP_RESOLVE, "TSP_RESOLVE" }, 99 { TSP_QUIT, "TSP_QUIT" }, 100 { TSP_DATE, "TSP_DATE" }, 101 { TSP_DATEREQ, "TSP_DATEREQ" }, 102 { TSP_DATEACK, "TSP_DATEACK" }, 103 { TSP_TRACEON, "TSP_TRACEON" }, 104 { TSP_TRACEOFF, "TSP_TRACEOFF" }, 105 { TSP_MSITE, "TSP_MSITE" }, 106 { TSP_MSITEREQ, "TSP_MSITEREQ" }, 107 { TSP_TEST, "TSP_TEST" }, 108 { TSP_SETDATE, "TSP_SETDATE" }, 109 { TSP_SETDATEREQ, "TSP_SETDATEREQ" }, 110 { TSP_LOOP, "TSP_LOOP" }, 111 { 0, NULL } 112 }; 113 114 UNALIGNED_OK 115 void 116 timed_print(netdissect_options *ndo, 117 const u_char *bp) 118 { 119 const struct tsp *tsp = (const struct tsp *)bp; 120 uint8_t tsp_type; 121 int sec, usec; 122 123 ndo->ndo_protocol = "timed"; 124 tsp_type = GET_U_1(tsp->tsp_type); 125 ND_PRINT("%s", tok2str(tsptype_str, "(tsp_type %#x)", tsp_type)); 126 127 ND_PRINT(" vers %u", GET_U_1(tsp->tsp_vers)); 128 129 ND_PRINT(" seq %u", GET_BE_U_2(tsp->tsp_seq)); 130 131 switch (tsp_type) { 132 case TSP_LOOP: 133 ND_PRINT(" hopcnt %u", GET_U_1(tsp->tsp_hopcnt)); 134 break; 135 case TSP_SETTIME: 136 case TSP_ADJTIME: 137 case TSP_SETDATE: 138 case TSP_SETDATEREQ: 139 sec = GET_BE_S_4(tsp->tsp_time.tv_sec); 140 usec = GET_BE_S_4(tsp->tsp_time.tv_usec); 141 /* XXX The comparison below is always false? */ 142 if (usec < 0) 143 /* invalid, skip the rest of the packet */ 144 return; 145 ND_PRINT(" time "); 146 if (sec < 0 && usec != 0) { 147 sec++; 148 if (sec == 0) 149 ND_PRINT("-"); 150 usec = 1000000 - usec; 151 } 152 ND_PRINT("%d.%06d", sec, usec); 153 break; 154 } 155 ND_PRINT(" name "); 156 nd_printjnp(ndo, tsp->tsp_name, sizeof(tsp->tsp_name)); 157 } 158
Indexes created Tue Feb 24 08:35:24 UTC 2026