1/* 2 * Copyright (c) 2005 Andrea Bittau <a.bittau@cs.ucl.ac.uk> 3 * 4 * This program is free software; you can redistribute it and/or modify 5 * it under the terms of the GNU General Public License as published by 6 * the Free Software Foundation; either version 2 of the License, or 7 * (at your option) any later version. 8 * 9 * This program is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12 * GNU General Public License for more details. 13 * 14 * You should have received a copy of the GNU General Public License 15 * along with this program; if not, write to the Free Software 16 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 17 */ 18#ifndef _DCCP_CCID2_H_ 19#define _DCCP_CCID2_H_ 20 21#include <linux/dccp.h> 22#include <linux/timer.h> 23#include <linux/types.h> 24#include "../ccid.h" 25/* NUMDUPACK parameter from RFC 4341, p. 6 */ 26#define NUMDUPACK 3 27 28struct sock; 29 30struct ccid2_seq { 31 u64 ccid2s_seq; 32 unsigned long ccid2s_sent; 33 int ccid2s_acked; 34 struct ccid2_seq *ccid2s_prev; 35 struct ccid2_seq *ccid2s_next; 36}; 37 38#define CCID2_SEQBUF_LEN 1024 39#define CCID2_SEQBUF_MAX 128 40 41/** 42 * struct ccid2_hc_tx_sock - CCID2 TX half connection 43 * @tx_{cwnd,ssthresh,pipe}: as per RFC 4341, section 5 44 * @tx_packets_acked: Ack counter for deriving cwnd growth (RFC 3465) 45 * @tx_lastrtt: time RTT was last measured 46 * @tx_rpseq: last consecutive seqno 47 * @tx_rpdupack: dupacks since rpseq 48 */ 49struct ccid2_hc_tx_sock { 50 u32 tx_cwnd; 51 u32 tx_ssthresh; 52 u32 tx_pipe; 53 u32 tx_packets_acked; 54 struct ccid2_seq *tx_seqbuf[CCID2_SEQBUF_MAX]; 55 int tx_seqbufc; 56 struct ccid2_seq *tx_seqh; 57 struct ccid2_seq *tx_seqt; 58 long tx_rto; 59 long tx_srtt; 60 long tx_rttvar; 61 unsigned long tx_lastrtt; 62 struct timer_list tx_rtotimer; 63 u64 tx_rpseq; 64 int tx_rpdupack; 65 unsigned long tx_last_cong; 66 u64 tx_high_ack; 67}; 68 69struct ccid2_hc_rx_sock { 70 int rx_data; 71}; 72 73static inline struct ccid2_hc_tx_sock *ccid2_hc_tx_sk(const struct sock *sk) 74{ 75 return ccid_priv(dccp_sk(sk)->dccps_hc_tx_ccid); 76} 77 78static inline struct ccid2_hc_rx_sock *ccid2_hc_rx_sk(const struct sock *sk) 79{ 80 return ccid_priv(dccp_sk(sk)->dccps_hc_rx_ccid); 81} 82#endif /* _DCCP_CCID2_H_ */ 83