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1/*
2 * net/dccp/ccids/ccid3.h
3 *
4 * Copyright (c) 2005 The University of Waikato, Hamilton, New Zealand.
5 *
6 * An implementation of the DCCP protocol
7 *
8 * This code has been developed by the University of Waikato WAND
9 * research group. For further information please see http://www.wand.net.nz/
10 * or e-mail Ian McDonald - iam4@cs.waikato.ac.nz
11 *
12 * This code also uses code from Lulea University, rereleased as GPL by its
13 * authors:
14 * Copyright (c) 2003 Nils-Erik Mattsson, Joacim Haggmark, Magnus Erixzon
15 *
16 * Changes to meet Linux coding standards, to make it meet latest ccid3 draft
17 * and to make it work as a loadable module in the DCCP stack written by
18 * Arnaldo Carvalho de Melo <acme@conectiva.com.br>.
19 *
20 * Copyright (c) 2005 Arnaldo Carvalho de Melo <acme@conectiva.com.br>
21 *
22 * This program is free software; you can redistribute it and/or modify
23 * it under the terms of the GNU General Public License as published by
24 * the Free Software Foundation; either version 2 of the License, or
25 * (at your option) any later version.
26 *
27 * This program is distributed in the hope that it will be useful,
28 * but WITHOUT ANY WARRANTY; without even the implied warranty of
29 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
30 * GNU General Public License for more details.
31 *
32 * You should have received a copy of the GNU General Public License
33 * along with this program; if not, write to the Free Software
34 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
35 */
36#ifndef _DCCP_CCID3_H_
37#define _DCCP_CCID3_H_
38
39#include <linux/types.h>
40#include <linux/list.h>
41#include <linux/timer.h>
42
43struct ccid3_tx_hist_entry {
44 struct list_head ccid3htx_node;
45 u64 ccid3htx_seqno:48,
46 ccid3htx_win_count:8,
47 ccid3htx_sent:1;
48 struct timeval ccid3htx_tstamp;
49};
50
51struct ccid3_options_received {
52 u64 ccid3or_seqno:48,
53 ccid3or_loss_intervals_idx:16;
54 u16 ccid3or_loss_intervals_len;
55 u32 ccid3or_loss_event_rate;
56 u32 ccid3or_receive_rate;
57};
58
59/** struct ccid3_hc_tx_sock - CCID3 sender half connection congestion control block
60 *
61 * @ccid3hctx_state - Sender state
62 * @ccid3hctx_x - Current sending rate
63 * @ccid3hctx_x_recv - Receive rate
64 * @ccid3hctx_x_calc - Calculated send (?) rate
65 * @ccid3hctx_s - Packet size
66 * @ccid3hctx_rtt - Estimate of current round trip time in usecs
67 * @@ccid3hctx_p - Current loss event rate (0-1) scaled by 1000000
68 * @ccid3hctx_last_win_count - Last window counter sent
69 * @ccid3hctx_t_last_win_count - Timestamp of earliest packet with last_win_count value sent
70 * @ccid3hctx_no_feedback_timer - Handle to no feedback timer
71 * @ccid3hctx_idle - FIXME
72 * @ccid3hctx_t_ld - Time last doubled during slow start
73 * @ccid3hctx_t_nom - Nominal send time of next packet
74 * @ccid3hctx_t_ipi - Interpacket (send) interval
75 * @ccid3hctx_delta - Send timer delta
76 * @ccid3hctx_hist - Packet history
77 */
78struct ccid3_hc_tx_sock {
79 u32 ccid3hctx_x;
80 u32 ccid3hctx_x_recv;
81 u32 ccid3hctx_x_calc;
82 u16 ccid3hctx_s;
83 u32 ccid3hctx_rtt;
84 u32 ccid3hctx_p;
85 u8 ccid3hctx_state;
86 u8 ccid3hctx_last_win_count;
87 u8 ccid3hctx_idle;
88 struct timeval ccid3hctx_t_last_win_count;
89 struct timer_list ccid3hctx_no_feedback_timer;
90 struct timeval ccid3hctx_t_ld;
91 struct timeval ccid3hctx_t_nom;
92 u32 ccid3hctx_t_ipi;
93 u32 ccid3hctx_delta;
94 struct list_head ccid3hctx_hist;
95 struct ccid3_options_received ccid3hctx_options_received;
96};
97
98struct ccid3_loss_interval_hist_entry {
99 struct list_head ccid3lih_node;
100 u64 ccid3lih_seqno:48,
101 ccid3lih_win_count:4;
102 u32 ccid3lih_interval;
103};
104
105struct ccid3_rx_hist_entry {
106 struct list_head ccid3hrx_node;
107 u64 ccid3hrx_seqno:48,
108 ccid3hrx_win_count:4,
109 ccid3hrx_type:4;
110 u32 ccid3hrx_ndp; /* In fact it is from 8 to 24 bits */
111 struct timeval ccid3hrx_tstamp;
112};
113
114struct ccid3_hc_rx_sock {
115 u64 ccid3hcrx_seqno_last_counter:48,
116 ccid3hcrx_state:8,
117 ccid3hcrx_last_counter:4;
118 unsigned long ccid3hcrx_rtt;
119 u32 ccid3hcrx_p;
120 u32 ccid3hcrx_bytes_recv;
121 struct timeval ccid3hcrx_tstamp_last_feedback;
122 struct timeval ccid3hcrx_tstamp_last_ack;
123 struct list_head ccid3hcrx_hist;
124 struct list_head ccid3hcrx_loss_interval_hist;
125 u16 ccid3hcrx_s;
126 u32 ccid3hcrx_pinv;
127 u32 ccid3hcrx_elapsed_time;
128 u32 ccid3hcrx_x_recv;
129};
130
131#define ccid3_hc_tx_field(s,field) (s->dccps_hc_tx_ccid_private == NULL ? 0 : \
132 ((struct ccid3_hc_tx_sock *)s->dccps_hc_tx_ccid_private)->ccid3hctx_##field)
133
134#define ccid3_hc_rx_field(s,field) (s->dccps_hc_rx_ccid_private == NULL ? 0 : \
135 ((struct ccid3_hc_rx_sock *)s->dccps_hc_rx_ccid_private)->ccid3hcrx_##field)
136
137#endif /* _DCCP_CCID3_H_ */
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-24 23:35:45 -0500