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