Commit | Line | Data |
---|---|---|
7c657876 ACM |
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 | ||
cfc3c525 | 39 | #include <linux/config.h> |
7c657876 | 40 | #include <linux/list.h> |
cfc3c525 ACM |
41 | #include <linux/time.h> |
42 | #include <linux/types.h> | |
43 | ||
44 | #define TFRC_MIN_PACKET_SIZE 16 | |
45 | #define TFRC_STD_PACKET_SIZE 256 | |
46 | #define TFRC_MAX_PACKET_SIZE 65535 | |
47 | ||
48 | /* Two seconds as per CCID3 spec */ | |
49 | #define TFRC_INITIAL_TIMEOUT (2 * USEC_PER_SEC) | |
50 | ||
51 | /* In usecs - half the scheduling granularity as per RFC3448 4.6 */ | |
52 | #define TFRC_OPSYS_HALF_TIME_GRAN (USEC_PER_SEC / (2 * HZ)) | |
53 | ||
54 | #define TFRC_WIN_COUNT_PER_RTT 4 | |
55 | #define TFRC_WIN_COUNT_LIMIT 16 | |
56 | ||
57 | /* In seconds */ | |
58 | #define TFRC_MAX_BACK_OFF_TIME 64 | |
59 | ||
60 | #define TFRC_SMALLEST_P 40 | |
61 | ||
cfc3c525 ACM |
62 | /* Number of later packets received before one is considered lost */ |
63 | #define TFRC_RECV_NUM_LATE_LOSS 3 | |
64 | ||
65 | enum ccid3_options { | |
66 | TFRC_OPT_LOSS_EVENT_RATE = 192, | |
67 | TFRC_OPT_LOSS_INTERVALS = 193, | |
68 | TFRC_OPT_RECEIVE_RATE = 194, | |
69 | }; | |
7c657876 ACM |
70 | |
71 | struct ccid3_options_received { | |
72 | u64 ccid3or_seqno:48, | |
73 | ccid3or_loss_intervals_idx:16; | |
74 | u16 ccid3or_loss_intervals_len; | |
75 | u32 ccid3or_loss_event_rate; | |
76 | u32 ccid3or_receive_rate; | |
77 | }; | |
78 | ||
cfc3c525 | 79 | /** struct ccid3_hc_tx_sock - CCID3 sender half connection sock |
7c657876 ACM |
80 | * |
81 | * @ccid3hctx_state - Sender state | |
82 | * @ccid3hctx_x - Current sending rate | |
83 | * @ccid3hctx_x_recv - Receive rate | |
84 | * @ccid3hctx_x_calc - Calculated send (?) rate | |
85 | * @ccid3hctx_s - Packet size | |
86 | * @ccid3hctx_rtt - Estimate of current round trip time in usecs | |
87 | * @@ccid3hctx_p - Current loss event rate (0-1) scaled by 1000000 | |
88 | * @ccid3hctx_last_win_count - Last window counter sent | |
cfc3c525 ACM |
89 | * @ccid3hctx_t_last_win_count - Timestamp of earliest packet |
90 | * with last_win_count value sent | |
7c657876 ACM |
91 | * @ccid3hctx_no_feedback_timer - Handle to no feedback timer |
92 | * @ccid3hctx_idle - FIXME | |
93 | * @ccid3hctx_t_ld - Time last doubled during slow start | |
94 | * @ccid3hctx_t_nom - Nominal send time of next packet | |
95 | * @ccid3hctx_t_ipi - Interpacket (send) interval | |
96 | * @ccid3hctx_delta - Send timer delta | |
97 | * @ccid3hctx_hist - Packet history | |
98 | */ | |
99 | struct ccid3_hc_tx_sock { | |
100 | u32 ccid3hctx_x; | |
101 | u32 ccid3hctx_x_recv; | |
102 | u32 ccid3hctx_x_calc; | |
103 | u16 ccid3hctx_s; | |
104 | u32 ccid3hctx_rtt; | |
105 | u32 ccid3hctx_p; | |
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; | |
c68e64cf | 113 | u32 ccid3hctx_t_rto; |
7c657876 ACM |
114 | u32 ccid3hctx_t_ipi; |
115 | u32 ccid3hctx_delta; | |
116 | struct list_head ccid3hctx_hist; | |
117 | struct ccid3_options_received ccid3hctx_options_received; | |
118 | }; | |
119 | ||
7c657876 ACM |
120 | struct ccid3_hc_rx_sock { |
121 | u64 ccid3hcrx_seqno_last_counter:48, | |
122 | ccid3hcrx_state:8, | |
123 | ccid3hcrx_last_counter:4; | |
124 | unsigned long ccid3hcrx_rtt; | |
125 | u32 ccid3hcrx_p; | |
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; |
7c657876 ACM |
131 | u16 ccid3hcrx_s; |
132 | u32 ccid3hcrx_pinv; | |
133 | u32 ccid3hcrx_elapsed_time; | |
134 | u32 ccid3hcrx_x_recv; | |
135 | }; | |
136 | ||
137 | #define ccid3_hc_tx_field(s,field) (s->dccps_hc_tx_ccid_private == NULL ? 0 : \ | |
cfc3c525 | 138 | ((struct ccid3_hc_tx_sock *)s->dccps_hc_tx_ccid_private)->ccid3hctx_##field) |
7c657876 ACM |
139 | |
140 | #define ccid3_hc_rx_field(s,field) (s->dccps_hc_rx_ccid_private == NULL ? 0 : \ | |
cfc3c525 | 141 | ((struct ccid3_hc_rx_sock *)s->dccps_hc_rx_ccid_private)->ccid3hcrx_##field) |
7c657876 ACM |
142 | |
143 | #endif /* _DCCP_CCID3_H_ */ |