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Message-ID: <4AA6A26A.6080808@embedded.ufcg.edu.br>
Date: Tue, 08 Sep 2009 15:28:58 -0300
From: Ivo Calado <ivocalado@...edded.ufcg.edu.br>
To: dccp@...r.kernel.org
CC: netdev@...r.kernel.org
Subject: [PATCH 5/5] Updating documentation accordingly
Updating documentation accordingly
Signed-off-by: Ivo Calado, Erivaldo Xavier, Leandro Sales <ivocalado@...edded.ufcg.edu.br>, <desadoc@...il.com>, <leandroal@...il.com>
Index: dccp_tree_work5/net/dccp/ccids/lib/loss_interval_sp.c
===================================================================
--- dccp_tree_work5.orig/net/dccp/ccids/lib/loss_interval_sp.c 2009-09-08 10:42:37.000000000 -0300
+++ dccp_tree_work5/net/dccp/ccids/lib/loss_interval_sp.c 2009-09-08 11:03:15.000000000 -0300
@@ -1,4 +1,6 @@
/*
+ * Copyright (c) 2009 Federal University of Campina Grande,
+ * Embedded Systems and Pervasive Computing Lab
* Copyright (c) 2007 The University of Aberdeen, Scotland, UK
* Copyright (c) 2005-7 The University of Waikato, Hamilton, New Zealand.
* Copyright (c) 2005-7 Ian McDonald <ian.mcdonald@...di.co.nz>
@@ -105,6 +107,13 @@
ld->counter = 0;
}
+/*
+ * tfrc_sp_ld_prepare_data - updates arrays on tfrc_loss_data
+ * so they can be sent as options
+ * @loss_count: current loss count (packets after hole on transmission),
+ * used to determine skip length for loss intervals option
+ * @ld: loss intervals data being updated
+ */
void tfrc_sp_ld_prepare_data(u8 loss_count, struct tfrc_loss_data *ld)
{
u8 *li_ofs, *d_ofs;
@@ -146,6 +155,16 @@
}
}
+/*
+ * tfrc_sp_update_li_data - Update tfrc_loss_data upon
+ * packet receiving or loss detection
+ * @ld: tfrc_loss_data being updated
+ * @rh: loss event record
+ * @skb: received packet
+ * @new_loss: dictates if new loss was detected
+ * upon receiving current packet
+ * @new_event: ...and if the loss starts new loss interval
+ */
void tfrc_sp_update_li_data(struct tfrc_loss_data *ld,
struct tfrc_rx_hist *rh,
struct sk_buff *skb,
@@ -324,7 +343,7 @@
}
/*
- * tfrc_lh_update_i_mean - Update the `open' loss interval I_0
+ * tfrc_sp_lh_update_i_mean - Update the `open' loss interval I_0
* This updates I_mean as the sequence numbers increase. As a consequence, the
* open loss interval I_0 increases, hence p = W_tot/max(I_tot0, I_tot1)
* decreases, and thus there is no need to send renewed feedback.
@@ -372,7 +391,8 @@
return cur->li_is_closed;
}
-/* tfrc_lh_interval_add - Insert new record into the Loss Interval database
+/*
+ * tfrc_sp_lh_interval_add - Insert new record into the Loss Interval database
* @lh: Loss Interval database
* @rh: Receive history containing a fresh loss event
* @calc_first_li: Caller-dependent routine to compute length of first interval
Index: dccp_tree_work5/net/dccp/ccids/lib/loss_interval_sp.h
===================================================================
--- dccp_tree_work5.orig/net/dccp/ccids/lib/loss_interval_sp.h 2009-09-08 10:42:37.000000000 -0300
+++ dccp_tree_work5/net/dccp/ccids/lib/loss_interval_sp.h 2009-09-08 10:55:15.000000000 -0300
@@ -1,6 +1,8 @@
#ifndef _DCCP_LI_HIST_SP_
#define _DCCP_LI_HIST_SP_
/*
+ * Copyright (c) 2009 Federal University of Campina Grande,
+ * Embedded Systems and Pervasive Computing Lab
* Copyright (c) 2007 The University of Aberdeen, Scotland, UK
* Copyright (c) 2005-7 The University of Waikato, Hamilton, New Zealand.
* Copyright (c) 2005-7 Ian McDonald <ian.mcdonald@...di.co.nz>
@@ -70,6 +72,15 @@
struct tfrc_rx_hist;
#endif
+/*
+ * tfrc_loss_data_entry - Holds info about one loss interval
+ * @next: next entry on this linked list
+ * @lossless_length: length of lossless sequence
+ * @ecn_nonce_sum: ecn nonce sum for this interval
+ * @loss_length: length of lossy part
+ * @data_length: data length on lossless part
+ * @drop_count: count of dopped packets
+ */
struct tfrc_loss_data_entry {
struct tfrc_loss_data_entry *next;
u32 lossless_length:24;
@@ -79,13 +90,29 @@
u32 drop_count:24;
};
+/* As defined at section 8.6.1. of RFC 4342 */
#define TFRC_LOSS_INTERVALS_OPT_MAX_LENGTH 28
+/* Specified on section 8.7. of CCID4 draft */
#define TFRC_DROP_OPT_MAX_LENGTH 84
#define TFRC_LI_OPT_SZ \
(2 + TFRC_LOSS_INTERVALS_OPT_MAX_LENGTH*9)
#define TFRC_DROPPED_OPT_SZ \
(1 + TFRC_DROP_OPT_MAX_LENGTH*3)
+/*
+ * tfrc_loss_data - loss interval data
+ * used by loss intervals and dropped packets options
+ * @head: linked list containing loss interval data
+ * @counter: number of entries
+ * @loss_intervals_opts: space necessary for writing temporary option
+ * data for loss intervals option
+ * @drop_opts: same for dropped packets option
+ * @last_loss_count: last loss count (num. of packets
+ * after hole on transmission) observed
+ * @sto_ecn: ecn's observed while waiting for hole
+ * to be filled or accepted as missing
+ * @sto_is_data: flags about if packets saw were data packets
+ */
struct tfrc_loss_data {
struct tfrc_loss_data_entry *head;
u16 counter;
Index: dccp_tree_work5/net/dccp/ccids/lib/packet_history_sp.c
===================================================================
--- dccp_tree_work5.orig/net/dccp/ccids/lib/packet_history_sp.c 2009-09-08 10:42:37.000000000 -0300
+++ dccp_tree_work5/net/dccp/ccids/lib/packet_history_sp.c 2009-09-08 10:57:07.000000000 -0300
@@ -4,6 +4,14 @@
*
* An implementation of the DCCP protocol
*
+ * Copyright (c) 2009 Ivo Calado, Erivaldo Xavier, Leandro Sales
+ *
+ * This code has been developed by the Federal University of Campina Grande
+ * Embedded Systems and Pervasive Computing Lab.
+ * For further information please see http://embedded.ufcg.edu.br/
+ * <ivocalado@...edded.ufcg.edu.br>,
+ * <desadoc@...il.com>, <leandroal@...il.com>
+ *
* This code has been developed by the University of Waikato WAND
* research group. For further information please see http://www.wand.net.nz/
* or e-mail Ian McDonald - ian.mcdonald@...di.co.nz
@@ -339,7 +347,7 @@
}
/*
- * tfrc_rx_congestion_event - Loss detection and further processing
+ * tfrc_sp_rx_congestion_event - Loss detection and further processing
* @h: The non-empty RX history object
* @lh: Loss Intervals database to update
* @skb: Currently received packet
@@ -495,7 +503,7 @@
}
/*
- * tfrc_rx_hist_sample_rtt - Sample RTT from timestamp / CCVal
+ * tfrc_sp_rx_hist_sample_rtt - Sample RTT from timestamp / CCVal
* Based on ideas presented in RFC 4342, 8.1. This function expects that no loss
* is pending and uses the following history entries (via rtt_sample_prev):
* - h->ring[0] contains the most recent history entry prior to @skb;
Index: dccp_tree_work5/net/dccp/ccids/lib/packet_history_sp.h
===================================================================
--- dccp_tree_work5.orig/net/dccp/ccids/lib/packet_history_sp.h 2009-09-08 10:42:37.000000000 -0300
+++ dccp_tree_work5/net/dccp/ccids/lib/packet_history_sp.h 2009-09-08 10:57:36.000000000 -0300
@@ -1,6 +1,14 @@
/*
* Packet RX/TX history data structures and routines for TFRC-based protocols.
*
+ * Copyright (c) 2009 Ivo Calado, Erivaldo Xavier, Leandro Sales
+ *
+ * This code has been developed by the Federal University of Campina Grande
+ * Embedded Systems and Pervasive Computing Lab.
+ * For further information please see http://embedded.ufcg.edu.br/
+ * <ivocalado@...edded.ufcg.edu.br>,
+ * <desadoc@...il.com>, <leandroal@...il.com>
+ *
* Copyright (c) 2007 The University of Aberdeen, Scotland, UK
* Copyright (c) 2005-6 The University of Waikato, Hamilton, New Zealand.
*
Index: dccp_tree_work5/net/dccp/ccids/lib/tfrc_ccids_sp.c
===================================================================
--- dccp_tree_work5.orig/net/dccp/ccids/lib/tfrc_ccids_sp.c 2009-09-08 10:26:38.000000000 -0300
+++ dccp_tree_work5/net/dccp/ccids/lib/tfrc_ccids_sp.c 2009-09-08 11:00:12.000000000 -0300
@@ -1,4 +1,6 @@
/*
+ * Copyright (c) 2009 Federal University of Campina Grande,
+ * Embedded Systems and Pervasive Computing Lab
* Copyright (c) 2007 Leandro Melo de Sales <leandroal@...il.com>
* Copyright (c) 2005 Ian McDonald <ian.mcdonald@...di.co.nz>
* Copyright (c) 2005 Arnaldo Carvalho de Melo <acme@...ectiva.com.br>
Index: dccp_tree_work5/net/dccp/ccids/lib/tfrc_ccids_sp.h
===================================================================
--- dccp_tree_work5.orig/net/dccp/ccids/lib/tfrc_ccids_sp.h 2009-09-08 10:42:37.000000000 -0300
+++ dccp_tree_work5/net/dccp/ccids/lib/tfrc_ccids_sp.h 2009-09-08 11:00:31.000000000 -0300
@@ -1,4 +1,6 @@
/*
+ * Copyright (c) 2009 Federal University of Campina Grande,
+ * Embedded Systems and Pervasive Computing Lab
* Copyright (c) 2007 Leandro Melo de Sales <leandroal@...il.com>
* Copyright (c) 2005 Ian McDonald <ian.mcdonald@...di.co.nz>
* Copyright (c) 2005 Arnaldo Carvalho de Melo <acme@...ectiva.com.br>
Index: dccp_tree_work5/net/dccp/ccids/lib/tfrc_equation_sp.c
===================================================================
--- dccp_tree_work5.orig/net/dccp/ccids/lib/tfrc_equation_sp.c 2009-09-08 10:26:38.000000000 -0300
+++ dccp_tree_work5/net/dccp/ccids/lib/tfrc_equation_sp.c 2009-09-08 11:01:45.000000000 -0300
@@ -1,4 +1,6 @@
/*
+ * Copyright (c) 2009 Federal University of Campina Grande,
+ * Embedded Systems and Pervasive Computing Lab
* Copyright (c) 2005 The University of Waikato, Hamilton, New Zealand.
* Copyright (c) 2005 Ian McDonald <ian.mcdonald@...di.co.nz>
* Copyright (c) 2005 Arnaldo Carvalho de Melo <acme@...ectiva.com.br>
@@ -607,7 +609,7 @@
}
/*
- * tfrc_calc_x - Calculate the send rate as per section 3.1 of RFC3448
+ * tfrc_sp_calc_x - Calculate the send rate as per section 3.1 of RFC3448
*
* @s: packet size in bytes
* @R: RTT scaled by 1000000 (i.e., microseconds)
@@ -667,7 +669,7 @@
}
/*
- * tfrc_calc_x_reverse_lookup - try to find p given f(p)
+ * tfrc_sp_calc_x_reverse_lookup - try to find p given f(p)
*
* @fvalue: function value to match, scaled by 1000000
* Returns closest match for p, also scaled by 1000000
@@ -700,7 +702,7 @@
}
/*
- * tfrc_invert_loss_event_rate - Compute p so that 10^6 corresponds to 100%
+ * tfrc_sp_invert_loss_event_rate - Compute p so that 10^6 corresponds to 100%
* When @loss_event_rate is large, there is a chance that p is truncated to 0.
* To avoid re-entering slow-start in that case, we set p = TFRC_SMALLEST_P > 0.
*/
Index: dccp_tree_work5/net/dccp/ccids/lib/tfrc_sp.c
===================================================================
--- dccp_tree_work5.orig/net/dccp/ccids/lib/tfrc_sp.c 2009-09-08 10:26:38.000000000 -0300
+++ dccp_tree_work5/net/dccp/ccids/lib/tfrc_sp.c 2009-09-08 11:02:15.000000000 -0300
@@ -1,6 +1,10 @@
/*
* TFRC library initialisation
*
+ * Copyright (c) 2009 Federal University of Campina Grande,
+ * Embedded Systems and Pervasive Computing Lab
+ * Almost copied from tfrc.c, only renamed symbols
+ *
* Copyright (c) 2007 The University of Aberdeen, Scotland, UK
* Copyright (c) 2007 Arnaldo Carvalho de Melo <acme@...hat.com>
*/
Index: dccp_tree_work5/net/dccp/ccids/lib/tfrc_sp.h
===================================================================
--- dccp_tree_work5.orig/net/dccp/ccids/lib/tfrc_sp.h 2009-09-08 10:26:38.000000000 -0300
+++ dccp_tree_work5/net/dccp/ccids/lib/tfrc_sp.h 2009-09-08 11:02:31.000000000 -0300
@@ -1,6 +1,8 @@
#ifndef _TFRC_SP_H_
#define _TFRC_SP_H_
/*
+ * Copyright (c) 2009 Federal University of Campina Grande,
+ * Embedded Systems and Pervasive Computing Lab
* Copyright (c) 2007 The University of Aberdeen, Scotland, UK
* Copyright (c) 2005-6 The University of Waikato, Hamilton, New Zealand.
* Copyright (c) 2005-6 Ian McDonald <ian.mcdonald@...di.co.nz>
--
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