X-Git-Url: https://git.tcpdump.org/tcpdump/blobdiff_plain/3cd171317f54bc968808d49e3ca87b6c49ccdcdd..b116cd9ac44b940cdda9493bb77e81ea42f1db7d:/print-ntp.c diff --git a/print-ntp.c b/print-ntp.c index 886a45fa..6fc1dd0d 100644 --- a/print-ntp.c +++ b/print-ntp.c @@ -24,31 +24,25 @@ */ #ifndef lint -static const char rcsid[] = - "@(#) $Header: /tcpdump/master/tcpdump/print-ntp.c,v 1.28 2000-07-01 03:39:07 assar Exp $ (LBL)"; +static const char rcsid[] _U_ = + "@(#) $Header: /tcpdump/master/tcpdump/print-ntp.c,v 1.43 2007-11-30 13:45:10 hannes Exp $ (LBL)"; #endif #ifdef HAVE_CONFIG_H #include "config.h" #endif -#include -#include -#include +#include -struct mbuf; -struct rtentry; -#include - -#include -#include - -#include #include #include +#ifdef HAVE_STRFTIME +#include +#endif #include "interface.h" #include "addrtoname.h" +#include "extract.h" #ifdef MODEMASK #undef MODEMASK /* Solaris sucks */ #endif @@ -58,6 +52,32 @@ static void p_sfix(const struct s_fixedpt *); static void p_ntp_time(const struct l_fixedpt *); static void p_ntp_delta(const struct l_fixedpt *, const struct l_fixedpt *); +static struct tok ntp_mode_values[] = { + { MODE_UNSPEC, "unspecified" }, + { MODE_SYM_ACT, "symmetric active" }, + { MODE_SYM_PAS, "symmetric passive" }, + { MODE_CLIENT, "Client" }, + { MODE_SERVER, "Server" }, + { MODE_BROADCAST, "Broadcast" }, + { MODE_RES1, "Reserved" }, + { MODE_RES2, "Reserved" }, + { 0, NULL } +}; + +static struct tok ntp_leapind_values[] = { + { NO_WARNING, "" }, + { PLUS_SEC, "+1s" }, + { MINUS_SEC, "-1s" }, + { ALARM, "clock unsynchronized" }, + { 0, NULL } +}; + +static struct tok ntp_stratum_values[] = { + { UNSPECIFIED, "unspecified" }, + { PRIM_REF, "primary reference" }, + { 0, NULL } +}; + /* * Print ntp requests */ @@ -66,93 +86,53 @@ ntp_print(register const u_char *cp, u_int length) { register const struct ntpdata *bp; int mode, version, leapind; - static char rclock[5]; bp = (struct ntpdata *)cp; - /* Note funny sized packets */ - if (length != sizeof(struct ntpdata)) - (void)printf(" [len=%d]", length); TCHECK(bp->status); version = (int)(bp->status & VERSIONMASK) >> 3; - printf(" v%d", version); - - leapind = bp->status & LEAPMASK; - switch (leapind) { - - case NO_WARNING: - break; - - case PLUS_SEC: - fputs(" +1s", stdout); - break; - - case MINUS_SEC: - fputs(" -1s", stdout); - break; - } + printf("NTPv%d", version); mode = bp->status & MODEMASK; - switch (mode) { - - case MODE_UNSPEC: /* unspecified */ - fputs(" unspec", stdout); - break; - - case MODE_SYM_ACT: /* symmetric active */ - fputs(" sym_act", stdout); - break; - - case MODE_SYM_PAS: /* symmetric passive */ - fputs(" sym_pas", stdout); - break; - - case MODE_CLIENT: /* client */ - fputs(" client", stdout); - break; - - case MODE_SERVER: /* server */ - fputs(" server", stdout); - break; - - case MODE_BROADCAST: /* broadcast */ - fputs(" bcast", stdout); - break; + if (!vflag) { + printf (", %s, length %u", + tok2str(ntp_mode_values, "Unknown mode", mode), + length); + return; + } + + printf (", length %u\n\t%s", + length, + tok2str(ntp_mode_values, "Unknown mode", mode)); - case MODE_RES1: /* reserved */ - fputs(" res1", stdout); - break; - - case MODE_RES2: /* reserved */ - fputs(" res2", stdout); - break; - - } + leapind = bp->status & LEAPMASK; + printf (", Leap indicator: %s (%u)", + tok2str(ntp_leapind_values, "Unknown", leapind), + leapind); TCHECK(bp->stratum); - printf(" strat %d", bp->stratum); + printf(", Stratum %u (%s)", + bp->stratum, + tok2str(ntp_stratum_values, (bp->stratum >=2 && bp->stratum<=15) ? "secondary reference" : "reserved", bp->stratum)); TCHECK(bp->ppoll); - printf(" poll %d", bp->ppoll); + printf(", poll %us", bp->ppoll); /* Can't TCHECK bp->precision bitfield so bp->distance + 0 instead */ - TCHECK2(bp->distance, 0); - printf(" prec %d", bp->precision); - - if (!vflag) - return; + TCHECK2(bp->root_delay, 0); + printf(", precision %d", bp->precision); - TCHECK(bp->distance); - fputs(" dist ", stdout); - p_sfix(&bp->distance); + TCHECK(bp->root_delay); + fputs("\n\tRoot Delay: ", stdout); + p_sfix(&bp->root_delay); - TCHECK(bp->dispersion); - fputs(" disp ", stdout); - p_sfix(&bp->dispersion); + TCHECK(bp->root_dispersion); + fputs(", Root dispersion: ", stdout); + p_sfix(&bp->root_dispersion); TCHECK(bp->refid); - fputs(" ref ", stdout); + fputs(", Reference-ID: ", stdout); /* Interpretation depends on stratum */ switch (bp->stratum) { @@ -161,9 +141,8 @@ ntp_print(register const u_char *cp, u_int length) break; case PRIM_REF: - strncpy(rclock, (char *)&(bp->refid), 4); - rclock[4] = '\0'; - fputs(rclock, stdout); + if (fn_printn((u_char *)&(bp->refid), 4, snapend)) + goto trunc; break; case INFO_QUERY: @@ -181,22 +160,38 @@ ntp_print(register const u_char *cp, u_int length) break; } - TCHECK(bp->reftime); - putchar('@'); - p_ntp_time(&(bp->reftime)); - - TCHECK(bp->org); - fputs(" orig ", stdout); - p_ntp_time(&(bp->org)); - - TCHECK(bp->rec); - fputs(" rec ", stdout); - p_ntp_delta(&(bp->org), &(bp->rec)); - - TCHECK(bp->xmt); - fputs(" xmt ", stdout); - p_ntp_delta(&(bp->org), &(bp->xmt)); - + TCHECK(bp->ref_timestamp); + fputs("\n\t Reference Timestamp: ", stdout); + p_ntp_time(&(bp->ref_timestamp)); + + TCHECK(bp->org_timestamp); + fputs("\n\t Originator Timestamp: ", stdout); + p_ntp_time(&(bp->org_timestamp)); + + TCHECK(bp->rec_timestamp); + fputs("\n\t Receive Timestamp: ", stdout); + p_ntp_time(&(bp->rec_timestamp)); + + TCHECK(bp->xmt_timestamp); + fputs("\n\t Transmit Timestamp: ", stdout); + p_ntp_time(&(bp->xmt_timestamp)); + + fputs("\n\t Originator - Receive Timestamp: ", stdout); + p_ntp_delta(&(bp->org_timestamp), &(bp->rec_timestamp)); + + fputs("\n\t Originator - Transmit Timestamp: ", stdout); + p_ntp_delta(&(bp->org_timestamp), &(bp->xmt_timestamp)); + + if ( (sizeof(struct ntpdata) - length) == 16) { /* Optional: key-id */ + printf("\n\tKey id: %u", bp->key_id); + } else if ( (sizeof(struct ntpdata) - length) == 0) { /* Optional: key-id + authentication */ + printf("\n\tKey id: %u", bp->key_id); + printf("\n\tAuthentication: %08x%08x%08x%08x", + EXTRACT_32BITS(bp->message_digest), + EXTRACT_32BITS(bp->message_digest + 4), + EXTRACT_32BITS(bp->message_digest + 8), + EXTRACT_32BITS(bp->message_digest + 12)); + } return; trunc: @@ -210,8 +205,8 @@ p_sfix(register const struct s_fixedpt *sfp) register int f; register float ff; - i = ntohs(sfp->int_part); - f = ntohs(sfp->fraction); + i = EXTRACT_16BITS(&sfp->int_part); + f = EXTRACT_16BITS(&sfp->fraction); ff = f / 65536.0; /* shift radix point by 16 bits */ f = ff * 1000000.0; /* Treat fraction as parts per million */ printf("%d.%06d", i, f); @@ -227,14 +222,29 @@ p_ntp_time(register const struct l_fixedpt *lfp) register u_int32_t f; register float ff; - i = ntohl(lfp->int_part); - uf = ntohl(lfp->fraction); + i = EXTRACT_32BITS(&lfp->int_part); + uf = EXTRACT_32BITS(&lfp->fraction); ff = uf; if (ff < 0.0) /* some compilers are buggy */ ff += FMAXINT; ff = ff / FMAXINT; /* shift radix point by 32 bits */ f = ff * 1000000000.0; /* treat fraction as parts per billion */ printf("%u.%09d", i, f); + +#ifdef HAVE_STRFTIME + /* + * print the time in human-readable format. + */ + if (i) { + time_t seconds = i - JAN_1970; + struct tm *tm; + char time_buf[128]; + + tm = localtime(&seconds); + strftime(time_buf, sizeof (time_buf), "%Y/%m/%d %H:%M:%S", tm); + printf (" (%s)", time_buf); + } +#endif } /* Prints time difference between *lfp and *olfp */ @@ -243,16 +253,22 @@ p_ntp_delta(register const struct l_fixedpt *olfp, register const struct l_fixedpt *lfp) { register int32_t i; - register u_int32_t uf; - register u_int32_t ouf; + register u_int32_t u, uf; + register u_int32_t ou, ouf; register u_int32_t f; register float ff; int signbit; - i = ntohl(lfp->int_part) - ntohl(olfp->int_part); + u = EXTRACT_32BITS(&lfp->int_part); + ou = EXTRACT_32BITS(&olfp->int_part); + uf = EXTRACT_32BITS(&lfp->fraction); + ouf = EXTRACT_32BITS(&olfp->fraction); + if (ou == 0 && ouf == 0) { + p_ntp_time(lfp); + return; + } - uf = ntohl(lfp->fraction); - ouf = ntohl(olfp->fraction); + i = u - ou; if (i > 0) { /* new is definitely greater than old */ signbit = 0; @@ -286,3 +302,4 @@ p_ntp_delta(register const struct l_fixedpt *olfp, putchar('+'); printf("%d.%09d", i, f); } +