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[linux/fpc-iii.git] / net / dccp / ccids / ccid2.h
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1 /*
2 * net/dccp/ccids/ccid2.h
4 * Copyright (c) 2005 Andrea Bittau <a.bittau@cs.ucl.ac.uk>
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.
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.
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.
20 #ifndef _DCCP_CCID2_H_
21 #define _DCCP_CCID2_H_
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
30 struct sock;
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;
40 #define CCID2_SEQBUF_LEN 1024
41 #define CCID2_SEQBUF_MAX 128
43 /** struct ccid2_hc_tx_sock - CCID2 TX half connection
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
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;
71 struct ccid2_hc_rx_sock {
72 int ccid2hcrx_data;
75 static inline struct ccid2_hc_tx_sock *ccid2_hc_tx_sk(const struct sock *sk)
77 return ccid_priv(dccp_sk(sk)->dccps_hc_tx_ccid);
80 static inline struct ccid2_hc_rx_sock *ccid2_hc_rx_sk(const struct sock *sk)
82 return ccid_priv(dccp_sk(sk)->dccps_hc_rx_ccid);
84 #endif /* _DCCP_CCID2_H_ */