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From: | Joel Cunningham |
Subject: | [lwip-devel] [task #14506] TCP: Combine RTO and Zero-window Probe mechanisms |
Date: | Tue, 9 May 2017 10:16:13 -0400 (EDT) |
User-agent: | Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_4) AppleWebKit/603.1.30 (KHTML, like Gecko) Version/10.1 Safari/603.1.30 |
URL: <http://savannah.nongnu.org/task/?14506> Summary: TCP: Combine RTO and Zero-window Probe mechanisms Project: lwIP - A Lightweight TCP/IP stack Submitted by: jcunningham Submitted on: Tue 09 May 2017 02:16:11 PM UTC Category: TCP Should Start On: Tue 09 May 2017 12:00:00 AM UTC Should be Finished on: Tue 09 May 2017 12:00:00 AM UTC Priority: 5 - Normal Status: None Privacy: Public Percent Complete: 0% Assigned to: None Open/Closed: Open Discussion Lock: Any Planned Release: None Effort: 0.00 _______________________________________________________ Details: See RFC 1122, 4.2.2.17 Probing Zero Windows. The RFC suggests that retransmission timer and zero-window probing may be able to be a shared mechanism since they both use exponential backoff and have a fixed maximum timeout We can combine the two mechanisms to reduce TCP variables in the pcb and also hopefully reduce code size We should also audit our timeouts to make sure they follow guidance in RFC 1122 section 4.3.2.5 TCP Connection Failures. Be sure to check for any newer RFC on this topic and possibly study other stacks maximum timeouts (Linux/FreeBSD/NetBSD) _______________________________________________________ Reply to this item at: <http://savannah.nongnu.org/task/?14506> _______________________________________________ Message sent via/by Savannah http://savannah.nongnu.org/
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