#ifndef lint
static const char rcsid[] =
"@(#) $Header: /cvs/Darwin/Commands/NeXT/network_cmds/tcpdump.tproj/print-ntp.c,v 1.1.1.1 1999/05/02 03:58:34 wsanchez Exp $ (LBL)";
#endif
#include <sys/param.h>
#include <sys/time.h>
#include <sys/socket.h>
#if __STDC__
struct mbuf;
struct rtentry;
#endif
#include <net/if.h>
#include <netinet/in.h>
#include <netinet/if_ether.h>
#include <ctype.h>
#include <stdio.h>
#include <string.h>
#include "interface.h"
#include "addrtoname.h"
#undef MODEMASK
#include "ntp.h"
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 *);
void
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;
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;
}
mode = bp->status & MODEMASK;
switch (mode) {
case MODE_UNSPEC:
fputs(" unspec", stdout);
break;
case MODE_SYM_ACT:
fputs(" sym_act", stdout);
break;
case MODE_SYM_PAS:
fputs(" sym_pas", stdout);
break;
case MODE_CLIENT:
fputs(" client", stdout);
break;
case MODE_SERVER:
fputs(" server", stdout);
break;
case MODE_BROADCAST:
fputs(" bcast", stdout);
break;
case MODE_RES1:
fputs(" res1", stdout);
break;
case MODE_RES2:
fputs(" res2", stdout);
break;
}
TCHECK(bp->stratum);
printf(" strat %d", bp->stratum);
TCHECK(bp->ppoll);
printf(" poll %d", bp->ppoll);
TCHECK2(bp->distance, 0);
printf(" prec %d", bp->precision);
if (!vflag)
return;
TCHECK(bp->distance);
fputs(" dist ", stdout);
p_sfix(&bp->distance);
TCHECK(bp->dispersion);
fputs(" disp ", stdout);
p_sfix(&bp->dispersion);
TCHECK(bp->refid);
fputs(" ref ", stdout);
switch (bp->stratum) {
case UNSPECIFIED:
printf("(unspec)");
break;
case PRIM_REF:
strncpy(rclock, (char *)&(bp->refid), 4);
rclock[4] = '\0';
fputs(rclock, stdout);
break;
case INFO_QUERY:
printf("%s INFO_QUERY", ipaddr_string(&(bp->refid)));
return;
case INFO_REPLY:
printf("%s INFO_REPLY", ipaddr_string(&(bp->refid)));
return;
default:
printf("%s", ipaddr_string(&(bp->refid)));
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));
return;
trunc:
fputs(" [|ntp]", stdout);
}
static void
p_sfix(register const struct s_fixedpt *sfp)
{
register int i;
register int f;
register float ff;
i = ntohs(sfp->int_part);
f = ntohs(sfp->fraction);
ff = f / 65536.0;
f = ff * 1000000.0;
printf("%d.%06d", i, f);
}
#define FMAXINT (4294967296.0)
static void
p_ntp_time(register const struct l_fixedpt *lfp)
{
register int32_t i;
register u_int32_t uf;
register u_int32_t f;
register float ff;
i = ntohl(lfp->int_part);
uf = ntohl(lfp->fraction);
ff = uf;
if (ff < 0.0)
ff += FMAXINT;
ff = ff / FMAXINT;
f = ff * 1000000000.0;
printf("%u.%09d", i, f);
}
static void
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 f;
register float ff;
int signbit;
i = ntohl(lfp->int_part) - ntohl(olfp->int_part);
uf = ntohl(lfp->fraction);
ouf = ntohl(olfp->fraction);
if (i > 0) {
signbit = 0;
f = uf - ouf;
if (ouf > uf)
i -= 1;
} else if (i < 0) {
signbit = 1;
f = ouf - uf;
if (uf > ouf)
i += 1;
i = -i;
} else {
if (uf > ouf) {
signbit = 0;
f = uf - ouf;
} else {
signbit = 1;
f = ouf - uf;
}
}
ff = f;
if (ff < 0.0)
ff += FMAXINT;
ff = ff / FMAXINT;
f = ff * 1000000000.0;
if (signbit)
putchar('-');
else
putchar('+');
printf("%d.%09d", i, f);
}