[deliverable/linux.git] / net / dccp / ccids / ccid2.h

/*
 *  Copyright (c) 2005 Andrea Bittau <a.bittau@cs.ucl.ac.uk>
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */
#ifndef _DCCP_CCID2_H_
#define _DCCP_CCID2_H_

#include <linux/dccp.h>
#include <linux/timer.h>
#include <linux/types.h>
#include "../ccid.h"
/* NUMDUPACK parameter from RFC 4341, p. 6 */
#define NUMDUPACK	3

struct sock;

struct ccid2_seq {
	u64			ccid2s_seq;
	unsigned long		ccid2s_sent;
	int			ccid2s_acked;
	struct ccid2_seq	*ccid2s_prev;
	struct ccid2_seq	*ccid2s_next;
};

#define CCID2_SEQBUF_LEN 1024
#define CCID2_SEQBUF_MAX 128

/**
 * struct ccid2_hc_tx_sock - CCID2 TX half connection
 * @ccid2hctx_{cwnd,ssthresh,pipe}: as per RFC 4341, section 5
 * @ccid2hctx_packets_acked - Ack counter for deriving cwnd growth (RFC 3465)
 * @ccid2hctx_lastrtt -time RTT was last measured
 * @ccid2hctx_rpseq - last consecutive seqno
 * @ccid2hctx_rpdupack - dupacks since rpseq
 */
struct ccid2_hc_tx_sock {
	u32			ccid2hctx_cwnd;
	u32			ccid2hctx_ssthresh;
	u32			ccid2hctx_pipe;
	u32			ccid2hctx_packets_acked;
	struct ccid2_seq	*ccid2hctx_seqbuf[CCID2_SEQBUF_MAX];
	int			ccid2hctx_seqbufc;
	struct ccid2_seq	*ccid2hctx_seqh;
	struct ccid2_seq	*ccid2hctx_seqt;
	long			ccid2hctx_rto;
	long			ccid2hctx_srtt;
	long			ccid2hctx_rttvar;
	unsigned long		ccid2hctx_lastrtt;
	struct timer_list	ccid2hctx_rtotimer;
	u64			ccid2hctx_rpseq;
	int			ccid2hctx_rpdupack;
	unsigned long		ccid2hctx_last_cong;
	u64			ccid2hctx_high_ack;
};

struct ccid2_hc_rx_sock {
	int	ccid2hcrx_data;
};

static inline struct ccid2_hc_tx_sock *ccid2_hc_tx_sk(const struct sock *sk)
{
	return ccid_priv(dccp_sk(sk)->dccps_hc_tx_ccid);
}

static inline struct ccid2_hc_rx_sock *ccid2_hc_rx_sk(const struct sock *sk)
{
	return ccid_priv(dccp_sk(sk)->dccps_hc_rx_ccid);
}
#endif /* _DCCP_CCID2_H_ */
Commit	Line	Data
2a91aa39	1	/*
2a91aa39 AB	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
91f0ebf7 ACM	21	#include <linux/dccp.h>
	22	#include <linux/timer.h>
	23	#include <linux/types.h>
	24	#include "../ccid.h"
63df18ad GR	25	/* NUMDUPACK parameter from RFC 4341, p. 6 */
63df18ad GR	26	#define NUMDUPACK 3
91f0ebf7 ACM	27
	28	struct sock;
	29
2a91aa39 AB	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
6472c051	38	#define CCID2_SEQBUF_LEN 1024
07978aab AB	39	#define CCID2_SEQBUF_MAX 128
07978aab AB	40
aa1b1ff0 GR	41	/**
aa1b1ff0 GR	42	* struct ccid2_hc_tx_sock - CCID2 TX half connection
95b21d7e	43	* @ccid2hctx_{cwnd,ssthresh,pipe}: as per RFC 4341, section 5
a3020025	44	* @ccid2hctx_packets_acked - Ack counter for deriving cwnd growth (RFC 3465)
2a91aa39	45	* @ccid2hctx_lastrtt -time RTT was last measured
2a91aa39 AB	46	* @ccid2hctx_rpseq - last consecutive seqno
2a91aa39 AB	47	* @ccid2hctx_rpdupack - dupacks since rpseq
aa1b1ff0	48	*/
2a91aa39	49	struct ccid2_hc_tx_sock {
ee196c21	50	u32 ccid2hctx_cwnd;
3deeadd7	51	u32 ccid2hctx_ssthresh;
95b21d7e	52	u32 ccid2hctx_pipe;
a3020025	53	u32 ccid2hctx_packets_acked;
07978aab AB	54	struct ccid2_seq *ccid2hctx_seqbuf[CCID2_SEQBUF_MAX];
07978aab AB	55	int ccid2hctx_seqbufc;
2a91aa39 AB	56	struct ccid2_seq *ccid2hctx_seqh;
	57	struct ccid2_seq *ccid2hctx_seqt;
	58	long ccid2hctx_rto;
	59	long ccid2hctx_srtt;
	60	long ccid2hctx_rttvar;
2a91aa39 AB	61	unsigned long ccid2hctx_lastrtt;
2a91aa39 AB	62	struct timer_list ccid2hctx_rtotimer;
2a91aa39 AB	63	u64 ccid2hctx_rpseq;
2a91aa39 AB	64	int ccid2hctx_rpdupack;
374bcf32	65	unsigned long ccid2hctx_last_cong;
32aac18d	66	u64 ccid2hctx_high_ack;
2a91aa39 AB	67	};
	68
	69	struct ccid2_hc_rx_sock {
	70	int ccid2hcrx_data;
	71	};
	72
91f0ebf7 ACM	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	}
2a91aa39	82	#endif /* _DCCP_CCID2_H_ */