linux/net/dccp/ccids
Gerrit Renker d2c726309d dccp ccid-3: remove buggy RTT-sampling history lookup
This removes the RTT-sampling function tfrc_tx_hist_rtt(), since

 1. it suffered from complex passing of return values (the return value both
    indicated successful lookup while the value doubled as RTT sample);

 2. when for some odd reason the sample value equalled 0, this triggered a bug
    warning about "bogus Ack", due to the ambiguity of the return value;

 3. on a passive host which has not sent anything the TX history is empty and
    thus will lead to unwanted "bogus Ack" warnings such as
    ccid3_hc_tx_packet_recv: server(e7b7d518): DATAACK with bogus ACK-28197148
    ccid3_hc_tx_packet_recv: server(e7b7d518): DATAACK with bogus ACK-26641606.

The fix is to replace the implicit encoding by performing the steps manually.

Furthermore, the "bogus Ack" warning has been removed, since it can actually be
triggered due to several reasons (network reordering, old packet, (3) above),
hence it is not very useful.

Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk>
2010-09-15 12:36:02 +02:00
..
lib dccp ccid-3: remove buggy RTT-sampling history lookup 2010-09-15 12:36:02 +02:00
ccid2.c dccp ccid-2: Share TCP's minimum RTO code 2010-08-30 13:45:27 -07:00
ccid2.h dccp ccid-2: Use u32 timestamps uniformly 2010-08-30 13:45:25 -07:00
ccid3.c dccp ccid-3: remove buggy RTT-sampling history lookup 2010-09-15 12:36:02 +02:00
ccid3.h dccp ccid-3: A lower bound for the inter-packet scheduling algorithm 2010-09-15 12:36:01 +02:00
Kconfig dccp ccid-3: use per-route RTO or TCP RTO as fallback 2010-08-30 13:45:28 -07:00