void handleFollowUp(MsgHeader *header, Octet *msgIbuf, ssize_t length, Boolean isFromSelf, PtpClock *ptpClock)
{
MsgFollowUp *follow;
TimeInternal preciseOriginTimestamp;
if(length < FOLLOW_UP_PACKET_LENGTH)
{
ERROR("short folow up message\n");
toState(PTP_FAULTY, ptpClock);
return;
}
switch(ptpClock->port_state)
{
case PTP_SLAVE:
if(isFromSelf)
{
DBG("handleFollowUp: ignore from self\n");
return;
}
if(getFlag(header->flags, PTP_SYNC_BURST) && !ptpClock->burst_enabled)
return;
DBGV("handleFollowUp: looking for uuid %02hhx:%02hhx:%02hhx:%02hhx:%02hhx:%02hhx\n",
ptpClock->parent_uuid[0], ptpClock->parent_uuid[1], ptpClock->parent_uuid[2],
ptpClock->parent_uuid[3], ptpClock->parent_uuid[4], ptpClock->parent_uuid[5]);
follow = &ptpClock->msgTmp.follow;
msgUnpackFollowUp(ptpClock->msgIbuf, follow);
if( ptpClock->waitingForFollow
&& follow->associatedSequenceId == ptpClock->parent_last_sync_sequence_number
&& header->sourceCommunicationTechnology == ptpClock->parent_communication_technology
&& header->sourcePortId == ptpClock->parent_port_id
&& !memcmp(header->sourceUuid, ptpClock->parent_uuid, PTP_UUID_LENGTH) )
{
ptpClock->waitingForFollow = FALSE;
toInternalTime(&preciseOriginTimestamp, &follow->preciseOriginTimestamp, &ptpClock->halfEpoch);
updateOffset(&preciseOriginTimestamp, &ptpClock->sync_receive_time,
&ptpClock->ofm_filt, ptpClock);
updateClock(ptpClock);
}
else
{
DBGV("handleFollowUp: unwanted\n");
}
break;
default:
DBGV("handleFollowUp: disreguard\n");
return;
}
}
static void handleFollowUp(PtpClock *ptpClock, Boolean isFromSelf)
{
TimeInternal preciseOriginTimestamp;
TimeInternal correctionField;
Boolean isFromCurrentParent = FALSE;
DBGV("handleFollowup: received\n");
if (ptpClock->msgIbufLength < FOLLOW_UP_LENGTH)
{
ERROR("handleFollowup: short message\n");
toState(ptpClock, PTP_FAULTY);
return;
}
if (isFromSelf)
{
DBGV("handleFollowup: ignore from self\n");
return;
}
switch (ptpClock->portDS.portState)
{
case PTP_INITIALIZING:
case PTP_FAULTY:
case PTP_DISABLED:
case PTP_LISTENING:
DBGV("handleFollowup: disreguard\n");
break;
case PTP_UNCALIBRATED:
case PTP_SLAVE:
isFromCurrentParent = isSamePortIdentity(
&ptpClock->parentDS.parentPortIdentity,
&ptpClock->msgTmpHeader.sourcePortIdentity);
if (!ptpClock->waitingForFollowUp)
{
DBGV("handleFollowup: not waiting a message\n");
break;
}
if (!isFromCurrentParent)
{
DBGV("handleFollowup: not from current parent\n");
break;
}
if (ptpClock->recvSyncSequenceId != ptpClock->msgTmpHeader.sequenceId)
{
DBGV("handleFollowup: SequenceID doesn't match with last Sync message\n");
break;
}
msgUnpackFollowUp(ptpClock->msgIbuf, &ptpClock->msgTmp.follow);
ptpClock->waitingForFollowUp = FALSE;
/* synchronize local clock */
toInternalTime(&preciseOriginTimestamp, &ptpClock->msgTmp.follow.preciseOriginTimestamp);
scaledNanosecondsToInternalTime(&ptpClock->msgTmpHeader.correctionfield, &correctionField);
addTime(&correctionField, &correctionField, &ptpClock->correctionField_sync);
updateOffset(ptpClock, &ptpClock->timestamp_syncRecieve, &preciseOriginTimestamp, &correctionField);
updateClock(ptpClock);
issueDelayReqTimerExpired(ptpClock);
break;
case PTP_MASTER:
DBGV("handleFollowup: from another master\n");
break;
case PTP_PASSIVE:
issueDelayReqTimerExpired(ptpClock);
DBGV("handleFollowup: disreguard\n");
break;
default:
DBG("handleFollowup: unrecognized state\n");
break;
}//Switch on (port_state)
}
void
handleFollowUp(MsgHeader *header, Octet *msgIbuf, ssize_t length,
Boolean isFromSelf, RunTimeOpts *rtOpts, PtpClock *ptpClock)
{
DBGV("Handlefollowup : Follow up message received \n");
TimeInternal preciseOriginTimestamp;
TimeInternal correctionField;
Boolean isFromCurrentParent = FALSE;
if (length < FOLLOW_UP_LENGTH)
{
ERROR("short Follow up message\n");
toState(PTP_FAULTY, rtOpts, ptpClock);
return;
}
if (isFromSelf)
{
DBGV("Handlefollowup : Ignore message from self \n");
return;
}
switch (ptpClock->portState)
{
case PTP_INITIALIZING:
case PTP_FAULTY:
case PTP_DISABLED:
case PTP_LISTENING:
DBGV("Handfollowup : disregard\n");
return;
case PTP_UNCALIBRATED:
case PTP_SLAVE:
isFromCurrentParent =
!memcmp(ptpClock->parentPortIdentity.clockIdentity,
header->sourcePortIdentity.clockIdentity,
CLOCK_IDENTITY_LENGTH) &&
(ptpClock->parentPortIdentity.portNumber ==
header->sourcePortIdentity.portNumber);
if (isFromCurrentParent) {
if (ptpClock->waitingForFollow) {
if ((ptpClock->recvSyncSequenceId ==
header->sequenceId)) {
msgUnpackFollowUp(ptpClock->msgIbuf,
&ptpClock->msgTmp.follow);
ptpClock->waitingForFollow = FALSE;
toInternalTime(&preciseOriginTimestamp,
&ptpClock->msgTmp.follow.preciseOriginTimestamp);
integer64_to_internalTime(ptpClock->msgTmpHeader.correctionfield,
&correctionField);
addTime(&correctionField,&correctionField,
&ptpClock->lastSyncCorrectionField);
/*
send_time = preciseOriginTimestamp (received inside followup)
recv_time = sync_receive_time (received as CMSG in handleEvent)
*/
updateOffset(&preciseOriginTimestamp,
&ptpClock->sync_receive_time,&ptpClock->ofm_filt,
rtOpts,ptpClock,
&correctionField);
updateClock(rtOpts,ptpClock);
break;
} else
INFO("Ignored followup, SequenceID doesn't match with "
"last Sync message \n");
} else
DBG2("Ignored followup, Slave was not waiting a follow up "
"message \n");
} else
DBG2("Ignored, Follow up message is not from current parent \n");
case PTP_MASTER:
case PTP_PASSIVE:
DBGV("Ignored, Follow up message received from another master \n");
break;
default:
DBG("do unrecognized state1\n");
break;
} /* Switch on (port_state) */
}
