X-Git-Url: https://git.tcpdump.org/tcpdump/blobdiff_plain/d8acd8f5d0d7cac4881b5552eca5dc40a5d3c0d1..296d466cd6bbf2f7e75e15bb6a01268e88c76ed0:/print-timed.c diff --git a/print-timed.c b/print-timed.c index f3cf6bc5..6733ef1b 100644 --- a/print-timed.c +++ b/print-timed.c @@ -19,95 +19,133 @@ * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. */ -#ifndef lint -static const char rcsid[] _U_ = - "@(#) $Header: /tcpdump/master/tcpdump/print-timed.c,v 1.9 2003-11-16 09:36:40 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 +#include -#include -#include +#include "netdissect-stdinc.h" -#include "timed.h" -#include "interface.h" +#include "netdissect.h" #include "extract.h" -static const char tstr[] = "[|timed]"; +struct tsp_timeval { + nd_int32_t tv_sec; + nd_int32_t tv_usec; +}; -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 { + 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) { - printf("%s", tstr); - 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) { - printf(" %s", tstr); - return; - } - printf(" vers %d", tsp->tsp_vers); + ND_PRINT(" vers %u", GET_U_1(tsp->tsp_vers)); - if (endof(tsp->tsp_seq) > snapend) { - printf(" %s", tstr); - 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) { - printf(" %s", tstr); - 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) { - printf(" %s", tstr); - 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) - printf(" %s", tstr); - 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)); }