From b84a2189c4e1835c51fd6b974a0497be9bc4ba87 Mon Sep 17 00:00:00 2001 From: Arnaldo Carvalho de Melo Date: Thu, 6 Dec 2007 13:18:11 -0200 Subject: [TFRC]: New rx history code Credit here goes to Gerrit Renker, that provided the initial implementation for this new codebase. I modified it just to try to make it closer to the existing API, renaming some functions, add namespacing and fix one bug where the tfrc_rx_hist_alloc was not freeing the allocated ring entries on the error path. Original changeset comment from Gerrit: ----------- This provides a new, self-contained and generic RX history service for TFRC based protocols. Details: * new data structure, initialisation and cleanup routines; * allocation of dccp_rx_hist entries local to packet_history.c, as a service exported by the dccp_tfrc_lib module. * interface to automatically track highest-received seqno; * receiver-based RTT estimation (needed for instance by RFC 3448, 6.3.1); * a generic function to test for `data packets' as per RFC 4340, sec. 7.7. Signed-off-by: Gerrit Renker Signed-off-by: Arnaldo Carvalho de Melo Signed-off-by: David S. Miller --- net/dccp/ccids/ccid3.h | 14 +++++--------- 1 file changed, 5 insertions(+), 9 deletions(-) (limited to 'net/dccp/ccids/ccid3.h') diff --git a/net/dccp/ccids/ccid3.h b/net/dccp/ccids/ccid3.h index b842a7dd99de..3c33dc670cf9 100644 --- a/net/dccp/ccids/ccid3.h +++ b/net/dccp/ccids/ccid3.h @@ -1,7 +1,8 @@ /* * net/dccp/ccids/ccid3.h * - * Copyright (c) 2005-6 The University of Waikato, Hamilton, New Zealand. + * Copyright (c) 2005-7 The University of Waikato, Hamilton, New Zealand. + * Copyright (c) 2007 The University of Aberdeen, Scotland, UK * * An implementation of the DCCP protocol * @@ -135,9 +136,7 @@ enum ccid3_hc_rx_states { * @ccid3hcrx_x_recv - Receiver estimate of send rate (RFC 3448 4.3) * @ccid3hcrx_rtt - Receiver estimate of rtt (non-standard) * @ccid3hcrx_p - current loss event rate (RFC 3448 5.4) - * @ccid3hcrx_seqno_nonloss - Last received non-loss sequence number - * @ccid3hcrx_ccval_nonloss - Last received non-loss Window CCVal - * @ccid3hcrx_ccval_last_counter - Tracks window counter (RFC 4342, 8.1) + * @ccid3hcrx_last_counter - Tracks window counter (RFC 4342, 8.1) * @ccid3hcrx_state - receiver state, one of %ccid3_hc_rx_states * @ccid3hcrx_bytes_recv - Total sum of DCCP payload bytes * @ccid3hcrx_tstamp_last_feedback - Time at which last feedback was sent @@ -152,14 +151,11 @@ struct ccid3_hc_rx_sock { #define ccid3hcrx_x_recv ccid3hcrx_tfrc.tfrcrx_x_recv #define ccid3hcrx_rtt ccid3hcrx_tfrc.tfrcrx_rtt #define ccid3hcrx_p ccid3hcrx_tfrc.tfrcrx_p - u64 ccid3hcrx_seqno_nonloss:48, - ccid3hcrx_ccval_nonloss:4, - ccid3hcrx_ccval_last_counter:4; + u8 ccid3hcrx_last_counter:4; enum ccid3_hc_rx_states ccid3hcrx_state:8; u32 ccid3hcrx_bytes_recv; ktime_t ccid3hcrx_tstamp_last_feedback; - ktime_t ccid3hcrx_tstamp_last_ack; - struct list_head ccid3hcrx_hist; + struct tfrc_rx_hist ccid3hcrx_hist; struct list_head ccid3hcrx_li_hist; u16 ccid3hcrx_s; u32 ccid3hcrx_pinv; -- cgit v1.2.3