| Arnaldo Carvalho de Melo | 65299d6 | 2005-09-18 00:18:32 -0700 | [diff] [blame] | 1 | #ifndef _LINUX_TFRC_H_ |
| 2 | #define _LINUX_TFRC_H_ |
| 3 | /* |
| Gerrit Renker | d61c167 | 2006-11-27 12:31:45 -0200 | [diff] [blame] | 4 | * TFRC - Data Structures for the TCP-Friendly Rate Control congestion |
| 5 | * control mechanism as specified in RFC 3448. |
| Arnaldo Carvalho de Melo | 65299d6 | 2005-09-18 00:18:32 -0700 | [diff] [blame] | 6 | * |
| 7 | * Copyright (c) 2005 The University of Waikato, Hamilton, New Zealand. |
| 8 | * Copyright (c) 2005 Ian McDonald <iam4@cs.waikato.ac.nz> |
| 9 | * Copyright (c) 2005 Arnaldo Carvalho de Melo <acme@conectiva.com.br> |
| 10 | * Copyright (c) 2003 Nils-Erik Mattsson, Joacim Haggmark, Magnus Erixzon |
| 11 | * |
| 12 | * This program is free software; you can redistribute it and/or modify |
| 13 | * it under the terms of the GNU General Public License as published by |
| 14 | * the Free Software Foundation; either version 2 of the License, or |
| 15 | * (at your option) any later version. |
| 16 | */ |
| Arnaldo Carvalho de Melo | 65299d6 | 2005-09-18 00:18:32 -0700 | [diff] [blame] | 17 | #include <linux/types.h> |
| 18 | |
| Gerrit Renker | d61c167 | 2006-11-27 12:31:45 -0200 | [diff] [blame] | 19 | /** tfrc_rx_info - TFRC Receiver Data Structure |
| 20 | * |
| 21 | * @tfrcrx_x_recv: receiver estimate of sending rate (3.2.2) |
| 22 | * @tfrcrx_rtt: round-trip-time (communicated by sender) |
| 23 | * @tfrcrx_p: current estimate of loss event rate (3.2.2) |
| 24 | */ |
| Arnaldo Carvalho de Melo | 65299d6 | 2005-09-18 00:18:32 -0700 | [diff] [blame] | 25 | struct tfrc_rx_info { |
| 26 | __u32 tfrcrx_x_recv; |
| 27 | __u32 tfrcrx_rtt; |
| 28 | __u32 tfrcrx_p; |
| 29 | }; |
| 30 | |
| Gerrit Renker | d61c167 | 2006-11-27 12:31:45 -0200 | [diff] [blame] | 31 | /** tfrc_tx_info - TFRC Sender Data Structure |
| 32 | * |
| 33 | * @tfrctx_x: computed transmit rate (4.3 (4)) |
| 34 | * @tfrctx_x_recv: receiver estimate of send rate (4.3) |
| 35 | * @tfrctx_x_calc: return value of throughput equation (3.1) |
| 36 | * @tfrctx_rtt: (moving average) estimate of RTT (4.3) |
| 37 | * @tfrctx_p: current loss event rate (5.4) |
| 38 | * @tfrctx_rto: estimate of RTO, equals 4*RTT (4.3) |
| 39 | * @tfrctx_ipi: inter-packet interval (4.6) |
| Gerrit Renker | 1a21e49 | 2006-12-10 00:02:12 -0200 | [diff] [blame] | 40 | * |
| 41 | * Note: X and X_recv are both maintained in units of 64 * bytes/second. This |
| 42 | * enables a finer resolution of sending rates and avoids problems with |
| 43 | * integer arithmetic; u32 is not sufficient as scaling consumes 6 bits. |
| Gerrit Renker | d61c167 | 2006-11-27 12:31:45 -0200 | [diff] [blame] | 44 | */ |
| Arnaldo Carvalho de Melo | 65299d6 | 2005-09-18 00:18:32 -0700 | [diff] [blame] | 45 | struct tfrc_tx_info { |
| Gerrit Renker | 1a21e49 | 2006-12-10 00:02:12 -0200 | [diff] [blame] | 46 | __u64 tfrctx_x; |
| 47 | __u64 tfrctx_x_recv; |
| Arnaldo Carvalho de Melo | 65299d6 | 2005-09-18 00:18:32 -0700 | [diff] [blame] | 48 | __u32 tfrctx_x_calc; |
| 49 | __u32 tfrctx_rtt; |
| 50 | __u32 tfrctx_p; |
| 51 | __u32 tfrctx_rto; |
| 52 | __u32 tfrctx_ipi; |
| 53 | }; |
| 54 | |
| 55 | #endif /* _LINUX_TFRC_H_ */ |