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7c657876 ACM |
1 | /* |
2 | * net/dccp/ccids/ccid3.h | |
3 | * | |
e6bccd35 | 4 | * Copyright (c) 2005-6 The University of Waikato, Hamilton, New Zealand. |
7c657876 ACM |
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/ | |
e6bccd35 | 10 | * or e-mail Ian McDonald - ian.mcdonald@jandi.co.nz |
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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 | ||
7c657876 | 39 | #include <linux/list.h> |
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40 | #include <linux/time.h> |
41 | #include <linux/types.h> | |
65299d6c | 42 | #include <linux/tfrc.h> |
91f0ebf7 | 43 | #include "../ccid.h" |
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44 | |
45 | #define TFRC_MIN_PACKET_SIZE 16 | |
46 | #define TFRC_STD_PACKET_SIZE 256 | |
47 | #define TFRC_MAX_PACKET_SIZE 65535 | |
48 | ||
49 | /* Two seconds as per CCID3 spec */ | |
50 | #define TFRC_INITIAL_TIMEOUT (2 * USEC_PER_SEC) | |
51 | ||
d7e0fb98 ACM |
52 | #define TFRC_INITIAL_IPI (USEC_PER_SEC / 4) |
53 | ||
cfc3c525 ACM |
54 | /* In usecs - half the scheduling granularity as per RFC3448 4.6 */ |
55 | #define TFRC_OPSYS_HALF_TIME_GRAN (USEC_PER_SEC / (2 * HZ)) | |
56 | ||
cfc3c525 ACM |
57 | /* In seconds */ |
58 | #define TFRC_MAX_BACK_OFF_TIME 64 | |
59 | ||
60 | #define TFRC_SMALLEST_P 40 | |
61 | ||
cfc3c525 ACM |
62 | enum ccid3_options { |
63 | TFRC_OPT_LOSS_EVENT_RATE = 192, | |
64 | TFRC_OPT_LOSS_INTERVALS = 193, | |
65 | TFRC_OPT_RECEIVE_RATE = 194, | |
66 | }; | |
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67 | |
68 | struct ccid3_options_received { | |
69 | u64 ccid3or_seqno:48, | |
70 | ccid3or_loss_intervals_idx:16; | |
71 | u16 ccid3or_loss_intervals_len; | |
72 | u32 ccid3or_loss_event_rate; | |
73 | u32 ccid3or_receive_rate; | |
74 | }; | |
75 | ||
cfc3c525 | 76 | /** struct ccid3_hc_tx_sock - CCID3 sender half connection sock |
7c657876 ACM |
77 | * |
78 | * @ccid3hctx_state - Sender state | |
79 | * @ccid3hctx_x - Current sending rate | |
80 | * @ccid3hctx_x_recv - Receive rate | |
81 | * @ccid3hctx_x_calc - Calculated send (?) rate | |
82 | * @ccid3hctx_s - Packet size | |
83 | * @ccid3hctx_rtt - Estimate of current round trip time in usecs | |
84 | * @@ccid3hctx_p - Current loss event rate (0-1) scaled by 1000000 | |
85 | * @ccid3hctx_last_win_count - Last window counter sent | |
cfc3c525 ACM |
86 | * @ccid3hctx_t_last_win_count - Timestamp of earliest packet |
87 | * with last_win_count value sent | |
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88 | * @ccid3hctx_no_feedback_timer - Handle to no feedback timer |
89 | * @ccid3hctx_idle - FIXME | |
90 | * @ccid3hctx_t_ld - Time last doubled during slow start | |
91 | * @ccid3hctx_t_nom - Nominal send time of next packet | |
92 | * @ccid3hctx_t_ipi - Interpacket (send) interval | |
93 | * @ccid3hctx_delta - Send timer delta | |
94 | * @ccid3hctx_hist - Packet history | |
95 | */ | |
96 | struct ccid3_hc_tx_sock { | |
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97 | struct tfrc_tx_info ccid3hctx_tfrc; |
98 | #define ccid3hctx_x ccid3hctx_tfrc.tfrctx_x | |
99 | #define ccid3hctx_x_recv ccid3hctx_tfrc.tfrctx_x_recv | |
100 | #define ccid3hctx_x_calc ccid3hctx_tfrc.tfrctx_x_calc | |
101 | #define ccid3hctx_rtt ccid3hctx_tfrc.tfrctx_rtt | |
102 | #define ccid3hctx_p ccid3hctx_tfrc.tfrctx_p | |
103 | #define ccid3hctx_t_rto ccid3hctx_tfrc.tfrctx_rto | |
104 | #define ccid3hctx_t_ipi ccid3hctx_tfrc.tfrctx_ipi | |
7c657876 | 105 | u16 ccid3hctx_s; |
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106 | u8 ccid3hctx_state; |
107 | u8 ccid3hctx_last_win_count; | |
108 | u8 ccid3hctx_idle; | |
109 | struct timeval ccid3hctx_t_last_win_count; | |
110 | struct timer_list ccid3hctx_no_feedback_timer; | |
111 | struct timeval ccid3hctx_t_ld; | |
112 | struct timeval ccid3hctx_t_nom; | |
7c657876 ACM |
113 | u32 ccid3hctx_delta; |
114 | struct list_head ccid3hctx_hist; | |
115 | struct ccid3_options_received ccid3hctx_options_received; | |
116 | }; | |
117 | ||
7c657876 | 118 | struct ccid3_hc_rx_sock { |
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119 | struct tfrc_rx_info ccid3hcrx_tfrc; |
120 | #define ccid3hcrx_x_recv ccid3hcrx_tfrc.tfrcrx_x_recv | |
121 | #define ccid3hcrx_rtt ccid3hcrx_tfrc.tfrcrx_rtt | |
122 | #define ccid3hcrx_p ccid3hcrx_tfrc.tfrcrx_p | |
7c657876 ACM |
123 | u64 ccid3hcrx_seqno_last_counter:48, |
124 | ccid3hcrx_state:8, | |
125 | ccid3hcrx_last_counter:4; | |
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126 | u32 ccid3hcrx_bytes_recv; |
127 | struct timeval ccid3hcrx_tstamp_last_feedback; | |
128 | struct timeval ccid3hcrx_tstamp_last_ack; | |
129 | struct list_head ccid3hcrx_hist; | |
ae6706f0 | 130 | struct list_head ccid3hcrx_li_hist; |
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131 | u16 ccid3hcrx_s; |
132 | u32 ccid3hcrx_pinv; | |
133 | u32 ccid3hcrx_elapsed_time; | |
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134 | }; |
135 | ||
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136 | static inline struct ccid3_hc_tx_sock *ccid3_hc_tx_sk(const struct sock *sk) |
137 | { | |
91f0ebf7 | 138 | return ccid_priv(dccp_sk(sk)->dccps_hc_tx_ccid); |
59725dc2 | 139 | } |
7c657876 | 140 | |
59725dc2 ACM |
141 | static inline struct ccid3_hc_rx_sock *ccid3_hc_rx_sk(const struct sock *sk) |
142 | { | |
91f0ebf7 | 143 | return ccid_priv(dccp_sk(sk)->dccps_hc_rx_ccid); |
59725dc2 | 144 | } |
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145 | |
146 | #endif /* _DCCP_CCID3_H_ */ |