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[lwip-devel] [bug #21181] Initial congestion window
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From: |
Oleg Tyshev |
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Subject: |
[lwip-devel] [bug #21181] Initial congestion window |
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Date: |
Mon, 08 Oct 2007 07:58:19 +0000 |
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User-agent: |
Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.1.7) Gecko/20070914 Firefox/2.0.0.7 |
Follow-up Comment #2, bug #21181 (project lwip):
In state SYN_SENT we have already sent our maximum segment size in first TCP
segment (MSS in TCP options).
Now, we should receive MSS from other side.
Resulting maximum segment size for both hosts is minimum of MSS1 and MSS2.
It will be calculated in tcp_parseopt(pcb).
I suppouse that congestion window should be calculated from this new
calculated MSS.
Other question, that we could take more aggressive initial value for
congestion window for example 2 * MSS.
RFC 3390 "Increasing TCP's Initial Window" recommends
following formula for calculation
min (4*MSS, max (2*MSS, 4380 bytes))
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