u_long
calyearstart(u_long ntp_time)
{
struct calendar jt;
caljulian(ntp_time,&jt);
jt.yearday = 1;
jt.monthday = 1;
jt.month = 1;
jt.hour = jt.minute = jt.second = 0;
return caltontp(&jt);
}
/******************************************************************************
*
* Function: tsync_poll()
* Description: Retrieve time from the TSYNC device.
*
* Parameters:
* IN: unit - not used.
* *peer - pointer to this reference clock's peer structure
* Returns: none.
*
*******************************************************************************/
static void tsync_poll(int unit, struct peer *peer)
{
char device[32];
struct refclockproc *pp;
struct calendar jt;
TsyncUnit *up;
unsigned char synch;
double seconds;
int err;
int err1;
int err2;
int err3;
int i;
int j;
unsigned int itAllocationLength;
unsigned int itAllocationLength1;
unsigned int itAllocationLength2;
NtpTimeObj TimeContext;
BoardObj hBoard;
char timeRef[TSYNC_REF_LEN + 1];
char ppsRef [TSYNC_REF_LEN + 1];
TIME_SCALE tmscl = TIME_SCALE_UTC;
LeapSecondObj leapSec;
ioctl_trans_di *it;
ioctl_trans_di *it1;
ioctl_trans_di *it2;
l_fp offset;
l_fp ltemp;
ReferenceObj * pRefObj;
/* Construct the device name */
sprintf(device, "%s%d", DEVICE, (int)peer->refclkunit);
printf("Polling device number %d...\n", (int)peer->refclkunit);
/* Open the TSYNC device */
hBoard.file_descriptor = open(device, O_RDONLY | O_NDELAY, 0777);
/* If error opening TSYNC device... */
if (hBoard.file_descriptor < 0)
{
msyslog(LOG_ERR, "Couldn't open device");
return;
}
/* If error while initializing the board... */
if (ioctl(hBoard.file_descriptor, IOCTL_TPRO_OPEN, &hBoard) < 0)
{
msyslog(LOG_ERR, "Couldn't initialize device");
close(hBoard.file_descriptor);
return;
}
/* Allocate memory for ioctl message */
itAllocationLength =
(sizeof(ioctl_trans_di) - DI_PAYLOADS_STARTER_LENGTH) +
TSYNC_REF_IN_LEN + TSYNC_REF_MAX_OUT_LEN;
it = (ioctl_trans_di*)alloca(itAllocationLength);
if (it == NULL) {
msyslog(LOG_ERR, "Couldn't allocate transaction memory - Reference");
return;
}
/* Build SS_GetRef ioctl message */
it->dest = TSYNC_REF_DEST_ID;
it->iid = TSYNC_REF_IID;
it->inPayloadOffset = TSYNC_REF_IN_PYLD_OFF;
it->inLength = TSYNC_REF_IN_LEN;
it->outPayloadOffset = TSYNC_REF_OUT_PYLD_OFF;
it->maxOutLength = TSYNC_REF_MAX_OUT_LEN;
it->actualOutLength = 0;
it->status = 0;
memset(it->payloads, 0, TSYNC_REF_MAX_OUT_LEN);
/* Read the reference from the TSYNC-PCI device */
err = ioctl(hBoard.file_descriptor,
IOCTL_TSYNC_GET,
(char *)it);
/* Allocate memory for ioctl message */
itAllocationLength1 =
(sizeof(ioctl_trans_di) - DI_PAYLOADS_STARTER_LENGTH) +
TSYNC_TMSCL_IN_LEN + TSYNC_TMSCL_MAX_OUT_LEN;
it1 = (ioctl_trans_di*)alloca(itAllocationLength1);
if (it1 == NULL) {
msyslog(LOG_ERR, "Couldn't allocate transaction memory - Time Scale");
return;
}
/* Build CS_GetTimeScale ioctl message */
it1->dest = TSYNC_TMSCL_DEST_ID;
it1->iid = TSYNC_TMSCL_IID;
it1->inPayloadOffset = TSYNC_TMSCL_IN_PYLD_OFF;
it1->inLength = TSYNC_TMSCL_IN_LEN;
it1->outPayloadOffset = TSYNC_TMSCL_OUT_PYLD_OFF;
it1->maxOutLength = TSYNC_TMSCL_MAX_OUT_LEN;
it1->actualOutLength = 0;
it1->status = 0;
memset(it1->payloads, 0, TSYNC_TMSCL_MAX_OUT_LEN);
/* Read the Time Scale info from the TSYNC-PCI device */
err1 = ioctl(hBoard.file_descriptor,
IOCTL_TSYNC_GET,
(char *)it1);
/* Allocate memory for ioctl message */
itAllocationLength2 =
(sizeof(ioctl_trans_di) - DI_PAYLOADS_STARTER_LENGTH) +
TSYNC_LEAP_IN_LEN + TSYNC_LEAP_MAX_OUT_LEN;
it2 = (ioctl_trans_di*)alloca(itAllocationLength2);
if (it2 == NULL) {
msyslog(LOG_ERR, "Couldn't allocate transaction memory - Leap Second");
return;
}
/* Build CS_GetLeapSec ioctl message */
it2->dest = TSYNC_LEAP_DEST_ID;
it2->iid = TSYNC_LEAP_IID;
it2->inPayloadOffset = TSYNC_LEAP_IN_PYLD_OFF;
it2->inLength = TSYNC_LEAP_IN_LEN;
it2->outPayloadOffset = TSYNC_LEAP_OUT_PYLD_OFF;
it2->maxOutLength = TSYNC_LEAP_MAX_OUT_LEN;
it2->actualOutLength = 0;
it2->status = 0;
memset(it2->payloads, 0, TSYNC_LEAP_MAX_OUT_LEN);
/* Read the leap seconds info from the TSYNC-PCI device */
err2 = ioctl(hBoard.file_descriptor,
IOCTL_TSYNC_GET,
(char *)it2);
pp = peer->procptr;
up = (TsyncUnit*)pp->unitptr;
/* Read the time from the TSYNC-PCI device */
err3 = ioctl(hBoard.file_descriptor,
IOCTL_TPRO_GET_NTP_TIME,
(char *)&TimeContext);
/* Close the TSYNC device */
close(hBoard.file_descriptor);
// Check for errors
if ((err < 0) ||(err1 < 0) || (err2 < 0) || (err3 < 0) ||
(it->status != 0) || (it1->status != 0) || (it2->status != 0) ||
(it->actualOutLength != TSYNC_REF_OUT_LEN) ||
(it1->actualOutLength != TSYNC_TMSCL_OUT_LEN) ||
(it2->actualOutLength != TSYNC_LEAP_OUT_LEN)) {
refclock_report(peer, CEVNT_FAULT);
return;
}
// Extract reference identifiers from ioctl payload
memset(timeRef, '\0', sizeof(timeRef));
memset(ppsRef, '\0', sizeof(ppsRef));
pRefObj = (void *)it->payloads;
memcpy(timeRef, pRefObj->time, TSYNC_REF_LEN);
memcpy(ppsRef, pRefObj->pps, TSYNC_REF_LEN);
// Extract the Clock Service Time Scale and convert to correct byte order
memcpy(&tmscl, ((TIME_SCALE*)(it1->payloads)), sizeof(tmscl));
tmscl = ntohl(tmscl);
// Extract leap second info from ioctl payload and perform byte swapping
for (i = 0; i < (sizeof(leapSec) / 4); i++)
{
for (j = 0; j < 4; j++)
{
((unsigned char*)&leapSec)[(i * 4) + j] =
((unsigned char*)(it2->payloads))[(i * 4) + (3 - j)];
}
}
// Determine time reference ID from reference name
for (i = 0; RefIdLookupTbl[i].pRef != NULL; i++)
{
// Search RefID table
if (strstr(timeRef, RefIdLookupTbl[i].pRef) != NULL)
{
// Found the matching string
break;
}
}
// Determine pps reference ID from reference name
for (j = 0; RefIdLookupTbl[j].pRef != NULL; j++)
{
// Search RefID table
if (strstr(ppsRef, RefIdLookupTbl[j].pRef) != NULL)
{
// Found the matching string
break;
}
}
// Determine synchronization state from flags
synch = (TimeContext.timeObj.flags == 0x4) ? 1 : 0;
// Pull seconds information from time object
seconds = (double) (TimeContext.timeObj.secsDouble);
seconds /= (double) 1000000.0;
/*
** Convert the number of microseconds to double and then place in the
** peer's last received long floating point format.
*/
DTOLFP(((double)TimeContext.tv.tv_usec / 1000000.0), &pp->lastrec);
/*
** The specTimeStamp is the number of seconds since 1/1/1970, while the
** peer's lastrec time should be compatible with NTP which is seconds since
** 1/1/1900. So Add the number of seconds between 1900 and 1970 to the
** specTimeStamp and place in the peer's lastrec long floating point struct.
*/
pp->lastrec.Ul_i.Xl_ui += (unsigned int)TimeContext.tv.tv_sec +
SECONDS_1900_TO_1970;
pp->polls++;
/*
** set the reference clock object
*/
sprintf(pp->a_lastcode, "%03d %02d:%02d:%02.6f",
TimeContext.timeObj.days, TimeContext.timeObj.hours,
TimeContext.timeObj.minutes, seconds);
pp->lencode = strlen (pp->a_lastcode);
pp->day = TimeContext.timeObj.days;
pp->hour = TimeContext.timeObj.hours;
pp->minute = TimeContext.timeObj.minutes;
pp->second = (int) seconds;
seconds = (seconds - (double) (pp->second / 1.0)) * 1000000000;
pp->nsec = (long) seconds;
/*
** calculate year start
*/
jt.year = TimeContext.timeObj.year;
jt.yearday = 1;
jt.monthday = 1;
jt.month = 1;
jt.hour = 0;
jt.minute = 0;
jt.second = 0;
pp->yearstart = caltontp(&jt);
// Calculate and report reference clock offset
offset.l_ui = (long)(((pp->day - 1) * 24) + pp->hour + GMT);
offset.l_ui = (offset.l_ui * 60) + (long)pp->minute;
offset.l_ui = (offset.l_ui * 60) + (long)pp->second;
offset.l_ui = offset.l_ui + (long)pp->yearstart;
offset.l_uf = 0;
DTOLFP(pp->nsec / 1e9, <emp);
L_ADD(&offset, <emp);
refclock_process_offset(pp, offset, pp->lastrec,
pp->fudgetime1);
// KTS in sync
if (synch) {
// Subtract leap second info by one second to determine effective day
ApplyTimeOffset(&(leapSec.utcDate), -1);
// If there is a leap second today and the KTS is using a time scale
// which handles leap seconds then
if ((tmscl != TIME_SCALE_GPS) && (tmscl != TIME_SCALE_TAI) &&
(leapSec.utcDate.year == (unsigned int)TimeContext.timeObj.year) &&
(leapSec.utcDate.doy == (unsigned int)TimeContext.timeObj.days))
{
// If adding a second
if (leapSec.offset == 1)
{
pp->leap = LEAP_ADDSECOND;
}
// Else if removing a second
else if (leapSec.offset == -1)
{
pp->leap = LEAP_DELSECOND;
}
// Else report no leap second pending (no handling of offsets
// other than +1 or -1)
else
{
pp->leap = LEAP_NOWARNING;
}
}
// Else report no leap second pending
else
{
pp->leap = LEAP_NOWARNING;
}
peer->leap = pp->leap;
refclock_report(peer, CEVNT_NOMINAL);
// If reference name reported, then not in holdover
if ((RefIdLookupTbl[i].pRef != NULL) &&
(RefIdLookupTbl[j].pRef != NULL))
{
// Determine if KTS being synchronized by host (identified as
// "LOCL")
if ((strcmp(RefIdLookupTbl[i].pRefId, TSYNC_REF_LOCAL) == 0) ||
(strcmp(RefIdLookupTbl[j].pRefId, TSYNC_REF_LOCAL) == 0))
{
// Clear prefer flag
peer->flags &= ~FLAG_PREFER;
// Set reference clock stratum level as unusable
pp->stratum = STRATUM_UNSPEC;
peer->stratum = pp->stratum;
// If a valid peer is available
if ((sys_peer != NULL) && (sys_peer != peer))
{
// Store reference peer stratum level and ID
up->refStratum = sys_peer->stratum;
up->refId = addr2refid(&sys_peer->srcadr);
}
}
else
{
// Restore prefer flag
peer->flags |= up->refPrefer;
// Store reference stratum as local clock
up->refStratum = TSYNC_LCL_STRATUM;
strncpy((char *)&up->refId, RefIdLookupTbl[j].pRefId,
TSYNC_REF_LEN);
// Set reference clock stratum level as local clock
pp->stratum = TSYNC_LCL_STRATUM;
peer->stratum = pp->stratum;
}
// Update reference name
strncpy((char *)&pp->refid, RefIdLookupTbl[j].pRefId,
TSYNC_REF_LEN);
peer->refid = pp->refid;
}
// Else in holdover
else
{
// Restore prefer flag
peer->flags |= up->refPrefer;
// Update reference ID to saved ID
pp->refid = up->refId;
peer->refid = pp->refid;
// Update stratum level to saved stratum level
pp->stratum = up->refStratum;
peer->stratum = pp->stratum;
}
}
// Else KTS not in sync
else {
// Place local identifier in peer RefID
strncpy((char *)&pp->refid, TSYNC_REF_LOCAL, TSYNC_REF_LEN);
peer->refid = pp->refid;
// Report not in sync
pp->leap = LEAP_NOTINSYNC;
peer->leap = pp->leap;
}
if (pp->coderecv == pp->codeproc) {
refclock_report(peer, CEVNT_TIMEOUT);
return;
}
record_clock_stats(&peer->srcadr, pp->a_lastcode);
refclock_receive(peer);
/* Increment the number of times the reference has been polled */
pp->polls++;
} /* End - tsync_poll() */
