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only send second packet of pair when required

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This commit is contained in:
Stephen Birarda 2015-09-01 11:10:19 -06:00
parent 2a8250ced5
commit 6c9021c288
1 changed files with 3 additions and 1 deletions
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4
libraries/networking/src/udt/SendQueue.cpp
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@ -443,10 +443,12 @@ bool SendQueue::maybeSendNewPacket() {
_packets.pop_front();
std::unique_ptr<Packet> secondPacket;
bool shouldSendPairTail = false;
if (((uint32_t) nextNumber & 0xF) == 0) {
// the first packet is the first in a probe pair - every 16 (rightmost 16 bits = 0) packets
// pull off a second packet if we can before we unlock
shouldSendPairTail = true;
if (_packets.size() > 0) {
secondPacket.swap(_packets.front());
@ -463,7 +465,7 @@ bool SendQueue::maybeSendNewPacket() {
// do we have a second in a pair to send as well?
if (secondPacket) {
sendNewPacketAndAddToSentList(move(secondPacket), getNextSequenceNumber());
} else {
} else if (shouldSendPairTail) {
// we didn't get a second packet to send in the probe pair
// send a control packet of type ProbePairTail so the receiver can still do
// proper bandwidth estimation