From: Gerrit Renker <gerrit@erg.abdn.ac.uk>
Date: Sun, 13 Jul 2008 10:51:40 +0000 (+0100)
Subject: dccp ccid-3: Fix a loss detection bug
X-Git-Tag: v2.6.27-rc1~969^2~161^2~1
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=b552c6231f19d50165bbf59e8b34d3f713ab5c01;p=pandora-kernel.git

dccp ccid-3: Fix a loss detection bug

This fixes a bug in the logic of the TFRC loss detection:
 * new_loss_indicated() should not be called while a loss is pending;
 * but the code allows this;
 * thus, for two subsequent gaps in the sequence space, when loss_count
   has not yet reached NDUPACK=3, the loss_count is falsely reduced to 1.

To avoid further and similar problems, all loss handling and loss detection is
now done inside tfrc_rx_hist_handle_loss(), using an appropriate routine to
track new losses.

Further changes:
----------------
 * added a reminder that no RX history operations should be performed when
   rx_handle_loss() has identified a (new) loss, since the function takes
   care of packet reordering during loss detection;
 * made tfrc_rx_hist_loss_pending() bool (thanks to an earlier suggestion
   by Arnaldo);
 * removed unused functions.

Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk>
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