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Diffstat (limited to 'net/dccp/ccids/ccid2.h')
| -rw-r--r-- | net/dccp/ccids/ccid2.h | 121 |
1 files changed, 0 insertions, 121 deletions
diff --git a/net/dccp/ccids/ccid2.h b/net/dccp/ccids/ccid2.h deleted file mode 100644 index 330c7b4ec001..000000000000 --- a/net/dccp/ccids/ccid2.h +++ /dev/null @@ -1,121 +0,0 @@ -/* SPDX-License-Identifier: GPL-2.0-or-later */ -/* - * Copyright (c) 2005 Andrea Bittau <a.bittau@cs.ucl.ac.uk> - */ -#ifndef _DCCP_CCID2_H_ -#define _DCCP_CCID2_H_ - -#include <linux/timer.h> -#include <linux/types.h> -#include "../ccid.h" -#include "../dccp.h" - -/* - * CCID-2 timestamping faces the same issues as TCP timestamping. - * Hence we reuse/share as much of the code as possible. - */ -#define ccid2_jiffies32 ((u32)jiffies) - -/* NUMDUPACK parameter from RFC 4341, p. 6 */ -#define NUMDUPACK 3 - -struct ccid2_seq { - u64 ccid2s_seq; - u32 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 - -/* - * Multiple of congestion window to keep the sequence window at - * (RFC 4340 7.5.2) - */ -#define CCID2_WIN_CHANGE_FACTOR 5 - -/** - * struct ccid2_hc_tx_sock - CCID2 TX half connection - * @tx_{cwnd,ssthresh,pipe}: as per RFC 4341, section 5 - * @tx_packets_acked: Ack counter for deriving cwnd growth (RFC 3465) - * @tx_srtt: smoothed RTT estimate, scaled by 2^3 - * @tx_mdev: smoothed RTT variation, scaled by 2^2 - * @tx_mdev_max: maximum of @mdev during one flight - * @tx_rttvar: moving average/maximum of @mdev_max - * @tx_rto: RTO value deriving from SRTT and RTTVAR (RFC 2988) - * @tx_rtt_seq: to decay RTTVAR at most once per flight - * @tx_cwnd_used: actually used cwnd, W_used of RFC 2861 - * @tx_expected_wnd: moving average of @tx_cwnd_used - * @tx_cwnd_stamp: to track idle periods in CWV - * @tx_lsndtime: last time (in jiffies) a data packet was sent - * @tx_rpseq: last consecutive seqno - * @tx_rpdupack: dupacks since rpseq - * @tx_av_chunks: list of Ack Vectors received on current skb - */ -struct ccid2_hc_tx_sock { - u32 tx_cwnd; - u32 tx_ssthresh; - u32 tx_pipe; - u32 tx_packets_acked; - struct ccid2_seq *tx_seqbuf[CCID2_SEQBUF_MAX]; - int tx_seqbufc; - struct ccid2_seq *tx_seqh; - struct ccid2_seq *tx_seqt; - - /* RTT measurement: variables/principles are the same as in TCP */ - u32 tx_srtt, - tx_mdev, - tx_mdev_max, - tx_rttvar, - tx_rto; - u64 tx_rtt_seq:48; - struct timer_list tx_rtotimer; - struct sock *sk; - - /* Congestion Window validation (optional, RFC 2861) */ - u32 tx_cwnd_used, - tx_expected_wnd, - tx_cwnd_stamp, - tx_lsndtime; - - u64 tx_rpseq; - int tx_rpdupack; - u32 tx_last_cong; - u64 tx_high_ack; - struct list_head tx_av_chunks; -}; - -static inline bool ccid2_cwnd_network_limited(struct ccid2_hc_tx_sock *hc) -{ - return hc->tx_pipe >= hc->tx_cwnd; -} - -/* - * Convert RFC 3390 larger initial window into an equivalent number of packets. - * This is based on the numbers specified in RFC 5681, 3.1. - */ -static inline u32 rfc3390_bytes_to_packets(const u32 smss) -{ - return smss <= 1095 ? 4 : (smss > 2190 ? 2 : 3); -} - -/** - * struct ccid2_hc_rx_sock - Receiving end of CCID-2 half-connection - * @rx_num_data_pkts: number of data packets received since last feedback - */ -struct ccid2_hc_rx_sock { - u32 rx_num_data_pkts; -}; - -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_ */ |