17c657876SArnaldo Carvalho de Melo /* 27c657876SArnaldo Carvalho de Melo * net/dccp/ccids/ccid3.h 37c657876SArnaldo Carvalho de Melo * 47c657876SArnaldo Carvalho de Melo * Copyright (c) 2005 The University of Waikato, Hamilton, New Zealand. 57c657876SArnaldo Carvalho de Melo * 67c657876SArnaldo Carvalho de Melo * An implementation of the DCCP protocol 77c657876SArnaldo Carvalho de Melo * 87c657876SArnaldo Carvalho de Melo * This code has been developed by the University of Waikato WAND 97c657876SArnaldo Carvalho de Melo * research group. For further information please see http://www.wand.net.nz/ 107c657876SArnaldo Carvalho de Melo * or e-mail Ian McDonald - iam4@cs.waikato.ac.nz 117c657876SArnaldo Carvalho de Melo * 127c657876SArnaldo Carvalho de Melo * This code also uses code from Lulea University, rereleased as GPL by its 137c657876SArnaldo Carvalho de Melo * authors: 147c657876SArnaldo Carvalho de Melo * Copyright (c) 2003 Nils-Erik Mattsson, Joacim Haggmark, Magnus Erixzon 157c657876SArnaldo Carvalho de Melo * 167c657876SArnaldo Carvalho de Melo * Changes to meet Linux coding standards, to make it meet latest ccid3 draft 177c657876SArnaldo Carvalho de Melo * and to make it work as a loadable module in the DCCP stack written by 187c657876SArnaldo Carvalho de Melo * Arnaldo Carvalho de Melo <acme@conectiva.com.br>. 197c657876SArnaldo Carvalho de Melo * 207c657876SArnaldo Carvalho de Melo * Copyright (c) 2005 Arnaldo Carvalho de Melo <acme@conectiva.com.br> 217c657876SArnaldo Carvalho de Melo * 227c657876SArnaldo Carvalho de Melo * This program is free software; you can redistribute it and/or modify 237c657876SArnaldo Carvalho de Melo * it under the terms of the GNU General Public License as published by 247c657876SArnaldo Carvalho de Melo * the Free Software Foundation; either version 2 of the License, or 257c657876SArnaldo Carvalho de Melo * (at your option) any later version. 267c657876SArnaldo Carvalho de Melo * 277c657876SArnaldo Carvalho de Melo * This program is distributed in the hope that it will be useful, 287c657876SArnaldo Carvalho de Melo * but WITHOUT ANY WARRANTY; without even the implied warranty of 297c657876SArnaldo Carvalho de Melo * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 307c657876SArnaldo Carvalho de Melo * GNU General Public License for more details. 317c657876SArnaldo Carvalho de Melo * 327c657876SArnaldo Carvalho de Melo * You should have received a copy of the GNU General Public License 337c657876SArnaldo Carvalho de Melo * along with this program; if not, write to the Free Software 347c657876SArnaldo Carvalho de Melo * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 357c657876SArnaldo Carvalho de Melo */ 367c657876SArnaldo Carvalho de Melo #ifndef _DCCP_CCID3_H_ 377c657876SArnaldo Carvalho de Melo #define _DCCP_CCID3_H_ 387c657876SArnaldo Carvalho de Melo 39cfc3c525SArnaldo Carvalho de Melo #include <linux/config.h> 407c657876SArnaldo Carvalho de Melo #include <linux/list.h> 41cfc3c525SArnaldo Carvalho de Melo #include <linux/time.h> 42cfc3c525SArnaldo Carvalho de Melo #include <linux/types.h> 4365299d6cSArnaldo Carvalho de Melo #include <linux/tfrc.h> 44cfc3c525SArnaldo Carvalho de Melo 45cfc3c525SArnaldo Carvalho de Melo #define TFRC_MIN_PACKET_SIZE 16 46cfc3c525SArnaldo Carvalho de Melo #define TFRC_STD_PACKET_SIZE 256 47cfc3c525SArnaldo Carvalho de Melo #define TFRC_MAX_PACKET_SIZE 65535 48cfc3c525SArnaldo Carvalho de Melo 49cfc3c525SArnaldo Carvalho de Melo /* Two seconds as per CCID3 spec */ 50cfc3c525SArnaldo Carvalho de Melo #define TFRC_INITIAL_TIMEOUT (2 * USEC_PER_SEC) 51cfc3c525SArnaldo Carvalho de Melo 52d7e0fb98SArnaldo Carvalho de Melo #define TFRC_INITIAL_IPI (USEC_PER_SEC / 4) 53d7e0fb98SArnaldo Carvalho de Melo 54cfc3c525SArnaldo Carvalho de Melo /* In usecs - half the scheduling granularity as per RFC3448 4.6 */ 55cfc3c525SArnaldo Carvalho de Melo #define TFRC_OPSYS_HALF_TIME_GRAN (USEC_PER_SEC / (2 * HZ)) 56cfc3c525SArnaldo Carvalho de Melo 57cfc3c525SArnaldo Carvalho de Melo /* In seconds */ 58cfc3c525SArnaldo Carvalho de Melo #define TFRC_MAX_BACK_OFF_TIME 64 59cfc3c525SArnaldo Carvalho de Melo 60cfc3c525SArnaldo Carvalho de Melo #define TFRC_SMALLEST_P 40 61cfc3c525SArnaldo Carvalho de Melo 62cfc3c525SArnaldo Carvalho de Melo enum ccid3_options { 63cfc3c525SArnaldo Carvalho de Melo TFRC_OPT_LOSS_EVENT_RATE = 192, 64cfc3c525SArnaldo Carvalho de Melo TFRC_OPT_LOSS_INTERVALS = 193, 65cfc3c525SArnaldo Carvalho de Melo TFRC_OPT_RECEIVE_RATE = 194, 66cfc3c525SArnaldo Carvalho de Melo }; 677c657876SArnaldo Carvalho de Melo 687c657876SArnaldo Carvalho de Melo struct ccid3_options_received { 697c657876SArnaldo Carvalho de Melo u64 ccid3or_seqno:48, 707c657876SArnaldo Carvalho de Melo ccid3or_loss_intervals_idx:16; 717c657876SArnaldo Carvalho de Melo u16 ccid3or_loss_intervals_len; 727c657876SArnaldo Carvalho de Melo u32 ccid3or_loss_event_rate; 737c657876SArnaldo Carvalho de Melo u32 ccid3or_receive_rate; 747c657876SArnaldo Carvalho de Melo }; 757c657876SArnaldo Carvalho de Melo 76cfc3c525SArnaldo Carvalho de Melo /** struct ccid3_hc_tx_sock - CCID3 sender half connection sock 777c657876SArnaldo Carvalho de Melo * 787c657876SArnaldo Carvalho de Melo * @ccid3hctx_state - Sender state 797c657876SArnaldo Carvalho de Melo * @ccid3hctx_x - Current sending rate 807c657876SArnaldo Carvalho de Melo * @ccid3hctx_x_recv - Receive rate 817c657876SArnaldo Carvalho de Melo * @ccid3hctx_x_calc - Calculated send (?) rate 827c657876SArnaldo Carvalho de Melo * @ccid3hctx_s - Packet size 837c657876SArnaldo Carvalho de Melo * @ccid3hctx_rtt - Estimate of current round trip time in usecs 847c657876SArnaldo Carvalho de Melo * @@ccid3hctx_p - Current loss event rate (0-1) scaled by 1000000 857c657876SArnaldo Carvalho de Melo * @ccid3hctx_last_win_count - Last window counter sent 86cfc3c525SArnaldo Carvalho de Melo * @ccid3hctx_t_last_win_count - Timestamp of earliest packet 87cfc3c525SArnaldo Carvalho de Melo * with last_win_count value sent 887c657876SArnaldo Carvalho de Melo * @ccid3hctx_no_feedback_timer - Handle to no feedback timer 897c657876SArnaldo Carvalho de Melo * @ccid3hctx_idle - FIXME 907c657876SArnaldo Carvalho de Melo * @ccid3hctx_t_ld - Time last doubled during slow start 917c657876SArnaldo Carvalho de Melo * @ccid3hctx_t_nom - Nominal send time of next packet 927c657876SArnaldo Carvalho de Melo * @ccid3hctx_t_ipi - Interpacket (send) interval 937c657876SArnaldo Carvalho de Melo * @ccid3hctx_delta - Send timer delta 947c657876SArnaldo Carvalho de Melo * @ccid3hctx_hist - Packet history 957c657876SArnaldo Carvalho de Melo */ 967c657876SArnaldo Carvalho de Melo struct ccid3_hc_tx_sock { 9765299d6cSArnaldo Carvalho de Melo struct tfrc_tx_info ccid3hctx_tfrc; 9865299d6cSArnaldo Carvalho de Melo #define ccid3hctx_x ccid3hctx_tfrc.tfrctx_x 9965299d6cSArnaldo Carvalho de Melo #define ccid3hctx_x_recv ccid3hctx_tfrc.tfrctx_x_recv 10065299d6cSArnaldo Carvalho de Melo #define ccid3hctx_x_calc ccid3hctx_tfrc.tfrctx_x_calc 10165299d6cSArnaldo Carvalho de Melo #define ccid3hctx_rtt ccid3hctx_tfrc.tfrctx_rtt 10265299d6cSArnaldo Carvalho de Melo #define ccid3hctx_p ccid3hctx_tfrc.tfrctx_p 10365299d6cSArnaldo Carvalho de Melo #define ccid3hctx_t_rto ccid3hctx_tfrc.tfrctx_rto 10465299d6cSArnaldo Carvalho de Melo #define ccid3hctx_t_ipi ccid3hctx_tfrc.tfrctx_ipi 1057c657876SArnaldo Carvalho de Melo u16 ccid3hctx_s; 1067c657876SArnaldo Carvalho de Melo u8 ccid3hctx_state; 1077c657876SArnaldo Carvalho de Melo u8 ccid3hctx_last_win_count; 1087c657876SArnaldo Carvalho de Melo u8 ccid3hctx_idle; 1097c657876SArnaldo Carvalho de Melo struct timeval ccid3hctx_t_last_win_count; 1107c657876SArnaldo Carvalho de Melo struct timer_list ccid3hctx_no_feedback_timer; 1117c657876SArnaldo Carvalho de Melo struct timeval ccid3hctx_t_ld; 1127c657876SArnaldo Carvalho de Melo struct timeval ccid3hctx_t_nom; 1137c657876SArnaldo Carvalho de Melo u32 ccid3hctx_delta; 1147c657876SArnaldo Carvalho de Melo struct list_head ccid3hctx_hist; 1157c657876SArnaldo Carvalho de Melo struct ccid3_options_received ccid3hctx_options_received; 1167c657876SArnaldo Carvalho de Melo }; 1177c657876SArnaldo Carvalho de Melo 1187c657876SArnaldo Carvalho de Melo struct ccid3_hc_rx_sock { 11965299d6cSArnaldo Carvalho de Melo struct tfrc_rx_info ccid3hcrx_tfrc; 12065299d6cSArnaldo Carvalho de Melo #define ccid3hcrx_x_recv ccid3hcrx_tfrc.tfrcrx_x_recv 12165299d6cSArnaldo Carvalho de Melo #define ccid3hcrx_rtt ccid3hcrx_tfrc.tfrcrx_rtt 12265299d6cSArnaldo Carvalho de Melo #define ccid3hcrx_p ccid3hcrx_tfrc.tfrcrx_p 1237c657876SArnaldo Carvalho de Melo u64 ccid3hcrx_seqno_last_counter:48, 1247c657876SArnaldo Carvalho de Melo ccid3hcrx_state:8, 1257c657876SArnaldo Carvalho de Melo ccid3hcrx_last_counter:4; 1267c657876SArnaldo Carvalho de Melo u32 ccid3hcrx_bytes_recv; 1277c657876SArnaldo Carvalho de Melo struct timeval ccid3hcrx_tstamp_last_feedback; 1287c657876SArnaldo Carvalho de Melo struct timeval ccid3hcrx_tstamp_last_ack; 1297c657876SArnaldo Carvalho de Melo struct list_head ccid3hcrx_hist; 130ae6706f0SArnaldo Carvalho de Melo struct list_head ccid3hcrx_li_hist; 1317c657876SArnaldo Carvalho de Melo u16 ccid3hcrx_s; 1327c657876SArnaldo Carvalho de Melo u32 ccid3hcrx_pinv; 1337c657876SArnaldo Carvalho de Melo u32 ccid3hcrx_elapsed_time; 1347c657876SArnaldo Carvalho de Melo }; 1357c657876SArnaldo Carvalho de Melo 13659725dc2SArnaldo Carvalho de Melo static inline struct ccid3_hc_tx_sock *ccid3_hc_tx_sk(const struct sock *sk) 13759725dc2SArnaldo Carvalho de Melo { 13859725dc2SArnaldo Carvalho de Melo return dccp_sk(sk)->dccps_hc_tx_ccid_private; 13959725dc2SArnaldo Carvalho de Melo } 1407c657876SArnaldo Carvalho de Melo 14159725dc2SArnaldo Carvalho de Melo static inline struct ccid3_hc_rx_sock *ccid3_hc_rx_sk(const struct sock *sk) 14259725dc2SArnaldo Carvalho de Melo { 14359725dc2SArnaldo Carvalho de Melo return dccp_sk(sk)->dccps_hc_rx_ccid_private; 14459725dc2SArnaldo Carvalho de Melo } 1457c657876SArnaldo Carvalho de Melo 1467c657876SArnaldo Carvalho de Melo #endif /* _DCCP_CCID3_H_ */ 147