1 /* 2 * net/dccp/ccids/ccid2.h 3 * 4 * Copyright (c) 2005 Andrea Bittau <a.bittau@cs.ucl.ac.uk> 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation; either version 2 of the License, or 9 * (at your option) any later version. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program; if not, write to the Free Software 18 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 19 */ 20 #ifndef _DCCP_CCID2_H_ 21 #define _DCCP_CCID2_H_ 22 23 #include <linux/dccp.h> 24 #include <linux/timer.h> 25 #include <linux/types.h> 26 #include "../ccid.h" 27 /* NUMDUPACK parameter from RFC 4341, p. 6 */ 28 #define NUMDUPACK 3 29 30 struct sock; 31 32 struct ccid2_seq { 33 u64 ccid2s_seq; 34 unsigned long ccid2s_sent; 35 int ccid2s_acked; 36 struct ccid2_seq *ccid2s_prev; 37 struct ccid2_seq *ccid2s_next; 38 }; 39 40 #define CCID2_SEQBUF_LEN 1024 41 #define CCID2_SEQBUF_MAX 128 42 43 /** struct ccid2_hc_tx_sock - CCID2 TX half connection 44 * 45 * @ccid2hctx_{cwnd,ssthresh,pipe}: as per RFC 4341, section 5 46 * @ccid2hctx_packets_acked - Ack counter for deriving cwnd growth (RFC 3465) 47 * @ccid2hctx_lastrtt -time RTT was last measured 48 * @ccid2hctx_rpseq - last consecutive seqno 49 * @ccid2hctx_rpdupack - dupacks since rpseq 50 */ 51 struct ccid2_hc_tx_sock { 52 u32 ccid2hctx_cwnd; 53 u32 ccid2hctx_ssthresh; 54 u32 ccid2hctx_pipe; 55 u32 ccid2hctx_packets_acked; 56 struct ccid2_seq *ccid2hctx_seqbuf[CCID2_SEQBUF_MAX]; 57 int ccid2hctx_seqbufc; 58 struct ccid2_seq *ccid2hctx_seqh; 59 struct ccid2_seq *ccid2hctx_seqt; 60 long ccid2hctx_rto; 61 long ccid2hctx_srtt; 62 long ccid2hctx_rttvar; 63 unsigned long ccid2hctx_lastrtt; 64 struct timer_list ccid2hctx_rtotimer; 65 u64 ccid2hctx_rpseq; 66 int ccid2hctx_rpdupack; 67 unsigned long ccid2hctx_last_cong; 68 u64 ccid2hctx_high_ack; 69 }; 70 71 struct ccid2_hc_rx_sock { 72 int ccid2hcrx_data; 73 }; 74 75 static inline struct ccid2_hc_tx_sock *ccid2_hc_tx_sk(const struct sock *sk) 76 { 77 return ccid_priv(dccp_sk(sk)->dccps_hc_tx_ccid); 78 } 79 80 static inline struct ccid2_hc_rx_sock *ccid2_hc_rx_sk(const struct sock *sk) 81 { 82 return ccid_priv(dccp_sk(sk)->dccps_hc_rx_ccid); 83 } 84 #endif /* _DCCP_CCID2_H_ */ 85