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| author |   Gerrit Renker <gerrit@erg.abdn.ac.uk> | 2008-09-04 07:30:19 +0200 |
|---|---|---|
| committer | Gerrit Renker <gerrit@erg.abdn.ac.uk> | 2008-09-04 07:45:40 +0200 |
| commit | d20ed95f8bf3d98d31dbbab8b00bb4c1a4a140f3 (patch) | |
| tree | a740d35fd710618863a63e4b86ecaedc2ea5497b /net/dccp/ccids/lib | |
| parent | dccp tfrc: Receiver history initialisation routine (diff) | |
| download | linux-dev-d20ed95f8bf3d98d31dbbab8b00bb4c1a4a140f3.tar.xz linux-dev-d20ed95f8bf3d98d31dbbab8b00bb4c1a4a140f3.zip | |
dccp tfrc: Perform early loss detection
This enables the TFRC code to begin loss detection (as soon as the module
is loaded), using the latest updates from rfc3448bis-06, 6.3.1:
* when the first data packet(s) are lost or marked, set
* X_target = s/(2*R) => f(p) = s/(R * X_target) = 2,
* corresponding to a loss rate of ~ 20.64%.
The handle_loss() function is now called right at the begin of rx_packet_recv()
and thus no longer protected against duplicates: hence a call to rx_duplicate()
has been added. Such a call makes sense now, as the previous patch initialises
the first entry with a sequence number of GSR.
Signed-off-by: Gerrit Renker <gerrit@erg.abdn.ac.uk>
Diffstat (limited to 'net/dccp/ccids/lib')
| -rw-r--r-- | net/dccp/ccids/lib/packet_history.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/net/dccp/ccids/lib/packet_history.c b/net/dccp/ccids/lib/packet_history.c index 5b4e1cf8439d..8db34225c002 100644 --- a/net/dccp/ccids/lib/packet_history.c +++ b/net/dccp/ccids/lib/packet_history.c @@ -335,6 +335,9 @@ int tfrc_rx_handle_loss(struct tfrc_rx_hist *h, { int is_new_loss = 0; + if (tfrc_rx_hist_duplicate(h, skb)) + return 0; + if (h->loss_count == 0) { __do_track_loss(h, skb, ndp); } else if (h->loss_count == 1) { |