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 28 struct sock; 29 30 struct 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 * @ccid2hctx_{cwnd,ssthresh,pipe}: as per RFC 4341, section 5 44 * @ccid2hctx_packets_acked - Ack counter for deriving cwnd growth (RFC 3465) 45 * @ccid2hctx_lastrtt -time RTT was last measured 46 * @ccid2hctx_rpseq - last consecutive seqno 47 * @ccid2hctx_rpdupack - dupacks since rpseq 48 */ 49 struct ccid2_hc_tx_sock { 50 u32 ccid2hctx_cwnd; 51 u32 ccid2hctx_ssthresh; 52 u32 ccid2hctx_pipe; 53 u32 ccid2hctx_packets_acked; 54 struct ccid2_seq *ccid2hctx_seqbuf[CCID2_SEQBUF_MAX]; 55 int ccid2hctx_seqbufc; 56 struct ccid2_seq *ccid2hctx_seqh; 57 struct ccid2_seq *ccid2hctx_seqt; 58 long ccid2hctx_rto; 59 long ccid2hctx_srtt; 60 long ccid2hctx_rttvar; 61 unsigned long ccid2hctx_lastrtt; 62 struct timer_list ccid2hctx_rtotimer; 63 u64 ccid2hctx_rpseq; 64 int ccid2hctx_rpdupack; 65 unsigned long ccid2hctx_last_cong; 66 u64 ccid2hctx_high_ack; 67 }; 68 69 struct ccid2_hc_rx_sock { 70 int ccid2hcrx_data; 71 }; 72 73 static 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 78 static 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