148 lines
4.6 KiB
C
148 lines
4.6 KiB
C
/*
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* Copyright (c) 2000 Ben Smithurst <ben@scientia.demon.co.uk>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that: (1) source code distributions
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* retain the above copyright notice and this paragraph in its entirety, (2)
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* distributions including binary code include the above copyright notice and
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* this paragraph in its entirety in the documentation or other materials
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* provided with the distribution, and (3) all advertising materials mentioning
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* features or use of this software display the following acknowledgement:
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* ``This product includes software developed by the University of California,
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* Lawrence Berkeley Laboratory and its contributors.'' Neither the name of
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* the University nor the names of its contributors may be used to endorse
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* or promote products derived from this software without specific prior
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* written permission.
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
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*/
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#define NETDISSECT_REWORKED
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <tcpdump-stdinc.h>
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#include "interface.h"
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#include "extract.h"
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/*
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* Time Synchronization Protocol
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*/
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struct tsp_timeval {
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uint32_t tv_sec;
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uint32_t tv_usec;
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};
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struct tsp {
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uint8_t tsp_type;
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uint8_t tsp_vers;
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uint16_t tsp_seq;
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union {
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struct tsp_timeval tspu_time;
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int8_t tspu_hopcnt;
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} tsp_u;
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int8_t tsp_name[256];
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};
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#define tsp_time tsp_u.tspu_time
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#define tsp_hopcnt tsp_u.tspu_hopcnt
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/*
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* Command types.
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*/
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#define TSP_ANY 0 /* match any types */
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#define TSP_ADJTIME 1 /* send adjtime */
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#define TSP_ACK 2 /* generic acknowledgement */
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#define TSP_MASTERREQ 3 /* ask for master's name */
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#define TSP_MASTERACK 4 /* acknowledge master request */
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#define TSP_SETTIME 5 /* send network time */
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#define TSP_MASTERUP 6 /* inform slaves that master is up */
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#define TSP_SLAVEUP 7 /* slave is up but not polled */
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#define TSP_ELECTION 8 /* advance candidature for master */
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#define TSP_ACCEPT 9 /* support candidature of master */
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#define TSP_REFUSE 10 /* reject candidature of master */
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#define TSP_CONFLICT 11 /* two or more masters present */
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#define TSP_RESOLVE 12 /* masters' conflict resolution */
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#define TSP_QUIT 13 /* reject candidature if master is up */
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#define TSP_DATE 14 /* reset the time (date command) */
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#define TSP_DATEREQ 15 /* remote request to reset the time */
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#define TSP_DATEACK 16 /* acknowledge time setting */
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#define TSP_TRACEON 17 /* turn tracing on */
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#define TSP_TRACEOFF 18 /* turn tracing off */
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#define TSP_MSITE 19 /* find out master's site */
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#define TSP_MSITEREQ 20 /* remote master's site request */
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#define TSP_TEST 21 /* for testing election algo */
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#define TSP_SETDATE 22 /* New from date command */
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#define TSP_SETDATEREQ 23 /* New remote for above */
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#define TSP_LOOP 24 /* loop detection packet */
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#define TSPTYPENUMBER 25
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static const char tstr[] = "[|timed]";
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static const char *tsptype[TSPTYPENUMBER] =
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{ "ANY", "ADJTIME", "ACK", "MASTERREQ", "MASTERACK", "SETTIME", "MASTERUP",
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"SLAVEUP", "ELECTION", "ACCEPT", "REFUSE", "CONFLICT", "RESOLVE", "QUIT",
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"DATE", "DATEREQ", "DATEACK", "TRACEON", "TRACEOFF", "MSITE", "MSITEREQ",
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"TEST", "SETDATE", "SETDATEREQ", "LOOP" };
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void
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timed_print(netdissect_options *ndo,
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register const u_char *bp)
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{
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struct tsp *tsp = (struct tsp *)bp;
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long sec, usec;
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ND_TCHECK(tsp->tsp_type);
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if (tsp->tsp_type < TSPTYPENUMBER)
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ND_PRINT((ndo, "TSP_%s", tsptype[tsp->tsp_type]));
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else
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ND_PRINT((ndo, "(tsp_type %#x)", tsp->tsp_type));
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ND_TCHECK(tsp->tsp_vers);
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ND_PRINT((ndo, " vers %u", tsp->tsp_vers));
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ND_TCHECK(tsp->tsp_seq);
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ND_PRINT((ndo, " seq %u", tsp->tsp_seq));
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switch (tsp->tsp_type) {
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case TSP_LOOP:
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ND_TCHECK(tsp->tsp_hopcnt);
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ND_PRINT((ndo, " hopcnt %u", tsp->tsp_hopcnt));
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break;
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case TSP_SETTIME:
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case TSP_ADJTIME:
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case TSP_SETDATE:
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case TSP_SETDATEREQ:
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ND_TCHECK(tsp->tsp_time);
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sec = EXTRACT_32BITS(&tsp->tsp_time.tv_sec);
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usec = EXTRACT_32BITS(&tsp->tsp_time.tv_usec);
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/* XXX The comparison below is always false? */
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if (usec < 0)
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/* corrupt, skip the rest of the packet */
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return;
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ND_PRINT((ndo, " time "));
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if (sec < 0 && usec != 0) {
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sec++;
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if (sec == 0)
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ND_PRINT((ndo, "-"));
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usec = 1000000 - usec;
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}
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ND_PRINT((ndo, "%ld.%06ld", sec, usec));
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break;
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}
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ND_TCHECK(tsp->tsp_name);
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ND_PRINT((ndo, " name "));
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if (fn_print(ndo, (u_char *)tsp->tsp_name, (u_char *)tsp->tsp_name + sizeof(tsp->tsp_name)))
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goto trunc;
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return;
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trunc:
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ND_PRINT((ndo, " %s", tstr));
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}
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