Re: What's the TCP retransmission algorithm in Linux.

From: Matthias Andree (ma@dt.e-technik.uni-dortmund.de)
Date: Tue May 23 2000 - 19:01:04 EST

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"Ariel Chen" <chenyp@brahms.ice.cycu.edu.tw> writes:

> I check /proc/net/snmp,
> tcpRtoAlgorithm = 0, so it means that Linux don't use MIL-STD-1778 or Van
> Jacobsen's algorithm
> to calculate retransmission timer??
> I trace kernel code again, there has no code to set the
> tcp_statistics.TcpRtoAlgorithm
> I am not sure why tcpRtoAlgorithm=0 ( in MIB-II, tcpRtoAlgorithm=1 | 2 | 3 |
> 4 )

Not quite sure what you're after. See
/usr/src/linux/net/ipv4/tcp_timer.c, search that file for "The TCP
retransmit timer" and start reading there.

-- Matthias Andree

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