/*
|
* 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.
|
*/
|
|
/* \summary: BSD time daemon protocol printer */
|
|
#ifdef HAVE_CONFIG_H
|
#include "config.h"
|
#endif
|
|
#include <netdissect-stdinc.h>
|
|
#include "netdissect.h"
|
#include "extract.h"
|
|
/*
|
* Time Synchronization Protocol
|
*
|
* http://docs.freebsd.org/44doc/smm/12.timed/paper.pdf
|
*/
|
|
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)
|
{
|
const struct tsp *tsp = (const 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)
|
/* invalid, 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, (const u_char *)tsp->tsp_name, (const u_char *)tsp->tsp_name + sizeof(tsp->tsp_name)))
|
goto trunc;
|
return;
|
|
trunc:
|
ND_PRINT((ndo, " %s", tstr));
|
}
|
