void SourceMatchController::DecrementMessageCount(Child &aChild)
{
if (aChild.GetIndirectMessageCount() == 0)
{
otLogWarnMac(GetInstance(), "DecrementMessageCount(child 0x%04x) called when already at zero count.",
aChild.GetRloc16());
ExitNow();
}
aChild.DecrementIndirectMessageCount();
if (aChild.GetIndirectMessageCount() == 0)
{
ClearEntry(aChild);
}
exit:
return;
}
otError DataPollManager::SendDataPoll(void)
{
otError error;
Message * message;
Neighbor *parent;
VerifyOrExit(mEnabled, error = OT_ERROR_INVALID_STATE);
VerifyOrExit(!Get<Mac::Mac>().GetRxOnWhenIdle(), error = OT_ERROR_INVALID_STATE);
parent = Get<Mle::MleRouter>().GetParentCandidate();
VerifyOrExit((parent != NULL) && parent->IsStateValidOrRestoring(), error = OT_ERROR_INVALID_STATE);
mTimer.Stop();
for (message = Get<MeshForwarder>().GetSendQueue().GetHead(); message; message = message->GetNext())
{
VerifyOrExit(message->GetType() != Message::kTypeMacDataPoll, error = OT_ERROR_ALREADY);
}
message = Get<MessagePool>().New(Message::kTypeMacDataPoll, 0);
VerifyOrExit(message != NULL, error = OT_ERROR_NO_BUFS);
error = Get<MeshForwarder>().SendMessage(*message);
if (error != OT_ERROR_NONE)
{
message->Free();
}
exit:
switch (error)
{
case OT_ERROR_NONE:
otLogDebgMac("Sending data poll");
if (mNoBufferRetxMode == true)
{
mNoBufferRetxMode = false;
ScheduleNextPoll(kRecalculatePollPeriod);
}
else
{
ScheduleNextPoll(kUsePreviousPollPeriod);
}
break;
case OT_ERROR_INVALID_STATE:
otLogWarnMac("Data poll tx requested while data polling was not enabled!");
StopPolling();
break;
case OT_ERROR_ALREADY:
otLogDebgMac("Data poll tx requested when a previous data request still in send queue.");
ScheduleNextPoll(kUsePreviousPollPeriod);
break;
case OT_ERROR_NO_BUFS:
default:
mNoBufferRetxMode = true;
ScheduleNextPoll(kRecalculatePollPeriod);
break;
}
return error;
}