Subject: [quicwg/base-drafts] wrong MSS value in congestion avoidance phase (#1102)

From: Yang Chi <[email-masked]>
Date: Thu, 08 Feb 2018 04:01:39 +0000 (UTC)

Current Recovery specs uses kDefaultMss as MSS value during congestion avoidance in OnPacketAckedCC function. As a result, if a sender sends out a congestion_window amount of data, and all these data gets acked in one onPacketAckedCC call, congestion_window will increase by kDefaultMss. But the sender's real MSS might be different. Seems like we should have another mss value defined in the specs as min(peer's advertised max_packet_size, pmtu), and use that in the OnPacketAckedCC function.

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