/* SPDX-License-Identifier: GPL-2.0-or-later */ /* * Copyright (c) 2005 Andrea Bittau <[email protected]> */ #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 … /* NUMDUPACK parameter from RFC 4341, p. 6 */ #define NUMDUPACK … struct ccid2_seq { … }; #define CCID2_SEQBUF_LEN … #define CCID2_SEQBUF_MAX … /* * Multiple of congestion window to keep the sequence window at * (RFC 4340 7.5.2) */ #define CCID2_WIN_CHANGE_FACTOR … /** * 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 { … }; static inline bool ccid2_cwnd_network_limited(struct ccid2_hc_tx_sock *hc) { … } /* * 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) { … } /** * 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 { … }; static inline struct ccid2_hc_tx_sock *ccid2_hc_tx_sk(const struct sock *sk) { … } static inline struct ccid2_hc_rx_sock *ccid2_hc_rx_sk(const struct sock *sk) { … } #endif /* _DCCP_CCID2_H_ */
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