LXR linux/net/dccp/ccids/ccid2.h

   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 * @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 */
  49struct 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
  69struct ccid2_hc_rx_sock {
  70        int     ccid2hcrx_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