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fixed beacon detect logic does not detect reconnected servers

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This commit is contained in:
Jeff Hill
2002-09-11 23:30:12 +00:00
parent 761a87ea73
commit 539d3478c8
7 changed files with 30 additions and 11 deletions
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25
src/ca/bhe.cpp
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@@ -89,7 +89,7 @@ void bhe::beaconAnomalyNotify ()
* updates beacon period, and looks for beacon anomalies
*/
bool bhe::updatePeriod ( const epicsTime & programBeginTime,
const epicsTime & currentTime, unsigned beaconNumber,
const epicsTime & currentTime, ca_uint32_t beaconNumber,
unsigned protocolRevision )
{
//
@@ -115,11 +115,28 @@ bool bhe::updatePeriod ( const epicsTime & programBeginTime,
return false;
}
// detect beacon duplications due to IP redundant packet routes
// 1) detect beacon duplications due to redundant routes
// 2) detect lost beacons due to input queue overrun or damage
if ( CA_V410 ( protocolRevision ) ) {
unsigned lastBeaconNumberSave = this->lastBeaconNumber;
unsigned beaconSeqAdvance;
if ( beaconNumber > this->lastBeaconNumber ) {
beaconSeqAdvance = beaconNumber - this->lastBeaconNumber;
}
else {
beaconSeqAdvance = ( ca_uint32_max - this->lastBeaconNumber ) + beaconNumber;
}
this->lastBeaconNumber = beaconNumber;
if ( beaconNumber != lastBeaconNumberSave + 1 ) {
// throw out sequence numbers just prior to, or the same as, the last one received
// (this situation is probably caused by a temporary duplicate route )
if ( beaconSeqAdvance == 0 || beaconSeqAdvance > ca_uint32_max - 256 ) {
return false;
}
// throw out sequence numbers that jump forward by only a few numbers
// (this situation is probably caused by a duplicate route
// or a beacon due to input queue overun)
if ( beaconSeqAdvance > 1 && beaconSeqAdvance < 4 ) {
return false;
}
}