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Haivision · Aug 8, 2023 · e58aaa4 · e58aaa4
1 parent b19e536
commit e58aaa4
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/srtcore/core.cpp b/srtcore/core.cpp
@@ -7926,6 +7926,8 @@ int srt::CUDT::sendCtrlAck(CPacket& ctrlpkt, int size)
     // The TSBPD thread may change the first lost sequence record (TLPKTDROP).
     // To avoid it the m_RcvBufferLock has to be acquired.
     UniqueLock bufflock(m_RcvBufferLock);
+    // The full ACK should be sent to indicate there is now available space in the RCV buffer
+    // since the last full ACK. It should unblock the sender to proceed further.
     const bool bNeedFullAck = (m_bBufferWasFull && getAvailRcvBufferSizeNoLock() > 0);
     int32_t ack;    // First unacknowledged packet sequence number (acknowledge up to ack).
     if (!getFirstNoncontSequence((ack), (reason)))