* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
-#ifndef lint
-static const char rcsid[] =
- "@(#) $Header: /tcpdump/master/tcpdump/print-timed.c,v 1.2 2001-05-09 01:21:43 fenner Exp $";
-#endif
+/* \summary: Berkeley UNIX Time Synchronization Protocol */
+
+/* specification: https://docs.freebsd.org/44doc/smm/12.timed/paper.pdf */
#ifdef HAVE_CONFIG_H
-#include "config.h"
+#include <config.h>
#endif
-#include <sys/param.h>
-#include <sys/time.h>
-#include <stdio.h>
-#include <string.h>
+#include "netdissect-stdinc.h"
+
+#include "netdissect.h"
+#include "extract.h"
+
+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 */
+
+#define TSPTYPENUMBER 25
-#include "timed.h"
-#include "interface.h"
-static char *tsptype[TSPTYPENUMBER] =
+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(register const u_char *bp, u_int length)
+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;
-
- if (endof(tsp->tsp_type) > snapend) {
- fputs("[|timed]", stdout);
- return;
- }
- if (tsp->tsp_type < TSPTYPENUMBER)
- printf("TSP_%s", tsptype[tsp->tsp_type]);
+ const struct tsp *tsp = (const struct tsp *)bp;
+ uint8_t tsp_type;
+ int sec, usec;
+
+ ndo->ndo_protocol = "timed";
+ tsp_type = GET_U_1(tsp->tsp_type);
+ if (tsp_type < TSPTYPENUMBER)
+ ND_PRINT("TSP_%s", tsptype[tsp_type]);
else
- printf("(tsp_type %#x)", tsp->tsp_type);
+ ND_PRINT("(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 = ntohl((long)tsp->tsp_time.tv_sec);
- usec = ntohl((long)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);
+ ND_PRINT("%d.%06d", sec, usec);
+ break;
}
+ ND_PRINT(" name ");
+ if (nd_printzp(ndo, tsp->tsp_name, sizeof(tsp->tsp_name),
+ ndo->ndo_snapend))
+ goto trunc;
+ return;
- 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);
- }
+trunc:
+ nd_print_trunc(ndo);
}
projects / tcpdump / blobdiff