| #ifndef _LINUX_TFRC_H_ |

| #define _LINUX_TFRC_H_ |

| /* |

| * TFRC - Data Structures for the TCP-Friendly Rate Control congestion |

| * control mechanism as specified in RFC 3448. |

| * |

| * Copyright (c) 2005 The University of Waikato, Hamilton, New Zealand. |

| * Copyright (c) 2005 Ian McDonald <iam4@cs.waikato.ac.nz> |

| * Copyright (c) 2005 Arnaldo Carvalho de Melo <acme@conectiva.com.br> |

| * Copyright (c) 2003 Nils-Erik Mattsson, Joacim Haggmark, Magnus Erixzon |

| * |

| * This program is free software; you can redistribute it and/or modify |

| * it under the terms of the GNU General Public License as published by |

| * the Free Software Foundation; either version 2 of the License, or |

| * (at your option) any later version. |

| */ |

| #include <linux/types.h> |

| |

| /** tfrc_rx_info - TFRC Receiver Data Structure |

| * |

| * @tfrcrx_x_recv: receiver estimate of sending rate (3.2.2) |

| * @tfrcrx_rtt: round-trip-time (communicated by sender) |

| * @tfrcrx_p: current estimate of loss event rate (3.2.2) |

| */ |

| struct tfrc_rx_info { |

| __u32 tfrcrx_x_recv; |

| __u32 tfrcrx_rtt; |

| __u32 tfrcrx_p; |

| }; |

| |

| /** tfrc_tx_info - TFRC Sender Data Structure |

| * |

| * @tfrctx_x: computed transmit rate (4.3 (4)) |

| * @tfrctx_x_recv: receiver estimate of send rate (4.3) |

| * @tfrctx_x_calc: return value of throughput equation (3.1) |

| * @tfrctx_rtt: (moving average) estimate of RTT (4.3) |

| * @tfrctx_p: current loss event rate (5.4) |

| * @tfrctx_rto: estimate of RTO, equals 4*RTT (4.3) |

| * @tfrctx_ipi: inter-packet interval (4.6) |

| * |

| * Note: X and X_recv are both maintained in units of 64 * bytes/second. This |

| * enables a finer resolution of sending rates and avoids problems with |

| * integer arithmetic; u32 is not sufficient as scaling consumes 6 bits. |

| */ |

| struct tfrc_tx_info { |

| __u64 tfrctx_x; |

| __u64 tfrctx_x_recv; |

| __u32 tfrctx_x_calc; |

| __u32 tfrctx_rtt; |

| __u32 tfrctx_p; |

| __u32 tfrctx_rto; |

| __u32 tfrctx_ipi; |

| }; |

| |

| #endif /* _LINUX_TFRC_H_ */ |