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  1. 15 7月, 2008 29 次提交
  3. 13 7月, 2008 4 次提交
    • G
      dccp ccid-3: Length of loss intervals · 2eeea7ba
      由 Gerrit Renker 提交于 
      This corrects an error in the computation of the open loss interval I_0:
  * the interval length is (highest_seqno - start_seqno) + 1
  * and not (highest_seqno - start_seqno).

This condition was not fully clear in RFC 3448, but reflects the current
revision state of rfc3448bis and is also consistent with RFC 4340, 6.1.1.

Further changes:
----------------
 * variable renamed due to line length constraints;
 * explicit typecast to `s64' to avoid implicit signed/unsigned casting.
Signed-off-by: NGerrit Renker <gerrit@erg.abdn.ac.uk>
      2eeea7ba
    • G
      dccp ccid-3: Fix a loss detection bug · b552c623
      由 Gerrit Renker 提交于 
      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: NGerrit Renker <gerrit@erg.abdn.ac.uk>
      b552c623
    • G
      dccp: Upgrade NDP count from 3 to 6 bytes · 5b5d0e70
      由 Gerrit Renker 提交于 
      RFC 4340, 7.7 specifies up to 6 bytes for the NDP Count option, whereas the code
is currently limited to up to 3 bytes. This seems to be a relict of an earlier 
draft version and is brought up to date by the patch.
Signed-off-by: NGerrit Renker <gerrit@erg.abdn.ac.uk>
      5b5d0e70
    • G
      dccp ccid-3: Fix error in loss detection · 2013c7e3
      由 Gerrit Renker 提交于 
      The TFRC loss detection code used the wrong loss condition (RFC 4340, 7.7.1):
 * the difference between sequence numbers s1 and s2 instead of 
 * the number of packets missing between s1 and s2 (one less than the distance).

Since this condition appears in many places of the code, it has been put into a
separate function, dccp_loss_free().

Further changes:
----------------
 * tidied up incorrect typing (it was using `int' for u64/s64 types);
 * optimised conditional statements for common case of non-reordered packets;
 * rewrote comments/documentation to match the changes.
Signed-off-by: NGerrit Renker <gerrit@erg.abdn.ac.uk>
      2013c7e3
  5. 11 7月, 2008 5 次提交
  7. 10 7月, 2008 2 次提交