1 #ifndef __pacer_timer_h__ 2 #define __pacer_timer_h__ 3 /*- 4 * Copyright (c) 2017 Netflix, Inc. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 18 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 25 * SUCH DAMAGE. 26 * 27 * __FBSDID("$FreeBSD$"); 28 */ 29 /* Common defines and such used by both RACK and BBR */ 30 /* Special values for mss accounting array */ 31 #define TCP_MSS_ACCT_JUSTRET 0 32 #define TCP_MSS_ACCT_SNDACK 1 33 #define TCP_MSS_ACCT_PERSIST 2 34 #define TCP_MSS_ACCT_ATIMER 60 35 #define TCP_MSS_ACCT_INPACE 61 36 #define TCP_MSS_ACCT_LATE 62 37 #define TCP_MSS_SMALL_SIZE_OFF 63 /* Point where small sizes enter */ 38 #define TCP_MSS_ACCT_SIZE 70 39 #define TCP_MSS_SMALL_MAX_SIZE_DIV (TCP_MSS_ACCT_SIZE - TCP_MSS_SMALL_SIZE_OFF) 40 41 #define DUP_ACK_THRESHOLD 3 42 43 /* Magic flags for tracing progress events */ 44 #define PROGRESS_DROP 1 45 #define PROGRESS_UPDATE 2 46 #define PROGRESS_CLEAR 3 47 #define PROGRESS_START 4 48 49 50 /* RTT sample methods */ 51 #define USE_RTT_HIGH 0 52 #define USE_RTT_LOW 1 53 #define USE_RTT_AVG 2 54 55 #define PACE_MAX_IP_BYTES 65536 56 #define USECS_IN_SECOND 1000000 57 #define MSEC_IN_SECOND 1000 58 #define MS_IN_USEC 1000 59 #define USEC_TO_MSEC(x) (x / MS_IN_USEC) 60 #define TCP_TS_OVERHEAD 12 /* Overhead of having Timestamps on */ 61 62 #ifdef _KERNEL 63 /* We have only 7 bits in rack so assert its true */ 64 CTASSERT((PACE_TMR_MASK & 0x80) == 0); 65 #ifdef KERN_TLS 66 uint32_t ctf_get_opt_tls_size(struct socket *so, uint32_t rwnd); 67 #endif 68 int 69 ctf_process_inbound_raw(struct tcpcb *tp, struct socket *so, 70 struct mbuf *m, int has_pkt); 71 int 72 ctf_do_queued_segments(struct socket *so, struct tcpcb *tp, int have_pkt); 73 uint32_t ctf_outstanding(struct tcpcb *tp); 74 uint32_t ctf_flight_size(struct tcpcb *tp, uint32_t rc_sacked); 75 int 76 ctf_drop_checks(struct tcpopt *to, struct mbuf *m, 77 struct tcphdr *th, struct tcpcb *tp, int32_t * tlenp, int32_t * thf, 78 int32_t * drop_hdrlen, int32_t * ret_val); 79 void 80 ctf_do_dropafterack(struct mbuf *m, struct tcpcb *tp, 81 struct tcphdr *th, int32_t thflags, int32_t tlen, int32_t * ret_val); 82 void 83 ctf_do_dropwithreset(struct mbuf *m, struct tcpcb *tp, 84 struct tcphdr *th, int32_t rstreason, int32_t tlen); 85 void 86 ctf_do_drop(struct mbuf *m, struct tcpcb *tp); 87 88 int 89 ctf_process_rst(struct mbuf *m, struct tcphdr *th, 90 struct socket *so, struct tcpcb *tp); 91 92 void 93 ctf_challenge_ack(struct mbuf *m, struct tcphdr *th, 94 struct tcpcb *tp, int32_t * ret_val); 95 96 int 97 ctf_ts_check(struct mbuf *m, struct tcphdr *th, 98 struct tcpcb *tp, int32_t tlen, int32_t thflags, int32_t * ret_val); 99 100 void 101 ctf_calc_rwin(struct socket *so, struct tcpcb *tp); 102 103 void 104 ctf_do_dropwithreset_conn(struct mbuf *m, struct tcpcb *tp, struct tcphdr *th, 105 int32_t rstreason, int32_t tlen); 106 107 uint32_t 108 ctf_fixed_maxseg(struct tcpcb *tp); 109 110 void 111 ctf_log_sack_filter(struct tcpcb *tp, int num_sack_blks, struct sackblk *sack_blocks); 112 113 uint32_t 114 ctf_decay_count(uint32_t count, uint32_t decay_percentage); 115 116 #endif 117 #endif 118