* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
-#ifndef lint
-static const char rcsid[] =
- "@(#) $Header: /tcpdump/master/tcpdump/print-timed.c,v 1.7 2002-12-11 07:14:10 guy Exp $";
-#endif
+/* \summary: Berkeley UNIX Time Synchronization Protocol */
-#ifdef HAVE_CONFIG_H
-#include "config.h"
-#endif
+/* specification: https://docs.freebsd.org/44doc/smm/12.timed/paper.pdf */
-#include <tcpdump-stdinc.h>
+#include <config.h>
-#include <stdio.h>
-#include <string.h>
+#include "netdissect-stdinc.h"
-#include "timed.h"
-#include "interface.h"
+#include "netdissect.h"
#include "extract.h"
-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" };
+struct tsp_timeval {
+ nd_int32_t tv_sec;
+ nd_int32_t tv_usec;
+};
+
+struct tsp {
+ nd_uint8_t tsp_type;
+ nd_uint8_t tsp_vers;
+ nd_uint16_t tsp_seq;
+ union {
+ struct tsp_timeval tspu_time;
+ nd_int8_t tspu_hopcnt;
+ } tsp_u;
+ nd_byte tsp_name[256]; /* null-terminated string up to 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 */
+static const struct tok tsptype_str[] = {
+ { TSP_ANY, "TSP_ANY" },
+ { TSP_ADJTIME, "TSP_ADJTIME" },
+ { TSP_ACK, "TSP_ACK" },
+ { TSP_MASTERREQ, "TSP_MASTERREQ" },
+ { TSP_MASTERACK, "TSP_MASTERACK" },
+ { TSP_SETTIME, "TSP_SETTIME" },
+ { TSP_MASTERUP, "TSP_MASTERUP" },
+ { TSP_SLAVEUP, "TSP_SLAVEUP" },
+ { TSP_ELECTION, "TSP_ELECTION" },
+ { TSP_ACCEPT, "TSP_ACCEPT" },
+ { TSP_REFUSE, "TSP_REFUSE" },
+ { TSP_CONFLICT, "TSP_CONFLICT" },
+ { TSP_RESOLVE, "TSP_RESOLVE" },
+ { TSP_QUIT, "TSP_QUIT" },
+ { TSP_DATE, "TSP_DATE" },
+ { TSP_DATEREQ, "TSP_DATEREQ" },
+ { TSP_DATEACK, "TSP_DATEACK" },
+ { TSP_TRACEON, "TSP_TRACEON" },
+ { TSP_TRACEOFF, "TSP_TRACEOFF" },
+ { TSP_MSITE, "TSP_MSITE" },
+ { TSP_MSITEREQ, "TSP_MSITEREQ" },
+ { TSP_TEST, "TSP_TEST" },
+ { TSP_SETDATE, "TSP_SETDATE" },
+ { TSP_SETDATEREQ, "TSP_SETDATEREQ" },
+ { TSP_LOOP, "TSP_LOOP" },
+ { 0, NULL }
+};
void
-timed_print(register const u_char *bp)
+timed_print(netdissect_options *ndo,
+ const u_char *bp)
{
-#define endof(x) ((u_char *)&(x) + sizeof (x))
- struct tsp *tsp = (struct tsp *)bp;
- long sec, usec;
- const u_char *end;
+ const struct tsp *tsp = (const struct tsp *)bp;
+ uint8_t tsp_type;
+ int sec, usec;
- if (endof(tsp->tsp_type) > snapend) {
- fputs("[|timed]", stdout);
- return;
- }
- if (tsp->tsp_type < TSPTYPENUMBER)
- printf("TSP_%s", tsptype[tsp->tsp_type]);
- else
- printf("(tsp_type %#x)", tsp->tsp_type);
+ ndo->ndo_protocol = "timed";
+ tsp_type = GET_U_1(tsp->tsp_type);
+ ND_PRINT("%s", tok2str(tsptype_str, "(tsp_type %#x)", tsp_type));
- if (endof(tsp->tsp_vers) > snapend) {
- fputs(" [|timed]", stdout);
- return;
- }
- printf(" vers %d", tsp->tsp_vers);
+ ND_PRINT(" vers %u", GET_U_1(tsp->tsp_vers));
- if (endof(tsp->tsp_seq) > snapend) {
- fputs(" [|timed]", stdout);
- return;
- }
- printf(" seq %d", tsp->tsp_seq);
+ ND_PRINT(" seq %u", GET_BE_U_2(tsp->tsp_seq));
- if (tsp->tsp_type == TSP_LOOP) {
- if (endof(tsp->tsp_hopcnt) > snapend) {
- fputs(" [|timed]", stdout);
- return;
- }
- printf(" hopcnt %d", tsp->tsp_hopcnt);
- } else if (tsp->tsp_type == TSP_SETTIME ||
- tsp->tsp_type == TSP_ADJTIME ||
- tsp->tsp_type == TSP_SETDATE ||
- tsp->tsp_type == TSP_SETDATEREQ) {
- if (endof(tsp->tsp_time) > snapend) {
- fputs(" [|timed]", stdout);
- return;
- }
- sec = EXTRACT_32BITS(&tsp->tsp_time.tv_sec);
- usec = EXTRACT_32BITS(&tsp->tsp_time.tv_usec);
+ switch (tsp_type) {
+ case TSP_LOOP:
+ ND_PRINT(" hopcnt %u", GET_U_1(tsp->tsp_hopcnt));
+ break;
+ case TSP_SETTIME:
+ case TSP_ADJTIME:
+ case TSP_SETDATE:
+ case TSP_SETDATEREQ:
+ sec = GET_BE_S_4(tsp->tsp_time.tv_sec);
+ usec = GET_BE_S_4(tsp->tsp_time.tv_usec);
+ /* XXX The comparison below is always false? */
if (usec < 0)
- /* corrupt, skip the rest of the packet */
+ /* invalid, skip the rest of the packet */
return;
- fputs(" time ", stdout);
+ ND_PRINT(" time ");
if (sec < 0 && usec != 0) {
sec++;
if (sec == 0)
- fputc('-', stdout);
+ ND_PRINT("-");
usec = 1000000 - usec;
}
- printf("%ld.%06ld", sec, usec);
- }
-
- end = memchr(tsp->tsp_name, '\0', snapend - (u_char *)tsp->tsp_name);
- if (end == NULL)
- fputs(" [|timed]", stdout);
- else {
- fputs(" name ", stdout);
- fwrite(tsp->tsp_name, end - (u_char *)tsp->tsp_name, 1, stdout);
+ ND_PRINT("%d.%06d", sec, usec);
+ break;
}
+ ND_PRINT(" name ");
+ nd_printjnp(ndo, tsp->tsp_name, sizeof(tsp->tsp_name));
}
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