
Type: feature Change-Id: I18dfac9c3d2f539edf20dba64cd2b7b541154144 Signed-off-by: Florin Coras <fcoras@cisco.com>
1303 lines
39 KiB
C
1303 lines
39 KiB
C
/*
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* Copyright (c) 2016-2019 Cisco and/or its affiliates.
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef _vnet_tcp_h_
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#define _vnet_tcp_h_
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#include <vnet/vnet.h>
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#include <vnet/ip/ip.h>
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#include <vnet/tcp/tcp_packet.h>
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#include <vnet/tcp/tcp_timer.h>
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#include <vnet/session/transport.h>
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#include <vnet/session/session.h>
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#include <vnet/tcp/tcp_debug.h>
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#define TCP_TICK 0.001 /**< TCP tick period (s) */
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#define THZ (u32) (1/TCP_TICK) /**< TCP tick frequency */
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#define TCP_TSTAMP_RESOLUTION TCP_TICK /**< Time stamp resolution */
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#define TCP_PAWS_IDLE 24 * 24 * 60 * 60 * THZ /**< 24 days */
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#define TCP_FIB_RECHECK_PERIOD 1 * THZ /**< Recheck every 1s */
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#define TCP_MAX_OPTION_SPACE 40
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#define TCP_CC_DATA_SZ 24
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#define TCP_MAX_GSO_SZ 65536
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#define TCP_RXT_MAX_BURST 10
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#define TCP_DUPACK_THRESHOLD 3
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#define TCP_IW_N_SEGMENTS 10
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#define TCP_ALWAYS_ACK 1 /**< On/off delayed acks */
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#define TCP_USE_SACKS 1 /**< Disable only for testing */
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/** TCP FSM state definitions as per RFC793. */
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#define foreach_tcp_fsm_state \
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_(CLOSED, "CLOSED") \
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_(LISTEN, "LISTEN") \
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_(SYN_SENT, "SYN_SENT") \
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_(SYN_RCVD, "SYN_RCVD") \
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_(ESTABLISHED, "ESTABLISHED") \
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_(CLOSE_WAIT, "CLOSE_WAIT") \
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_(FIN_WAIT_1, "FIN_WAIT_1") \
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_(LAST_ACK, "LAST_ACK") \
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_(CLOSING, "CLOSING") \
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_(FIN_WAIT_2, "FIN_WAIT_2") \
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_(TIME_WAIT, "TIME_WAIT")
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typedef enum _tcp_state
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{
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#define _(sym, str) TCP_STATE_##sym,
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foreach_tcp_fsm_state
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#undef _
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TCP_N_STATES
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} tcp_state_t;
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format_function_t format_tcp_state;
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format_function_t format_tcp_flags;
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format_function_t format_tcp_sacks;
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format_function_t format_tcp_rcv_sacks;
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/** TCP timers */
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#define foreach_tcp_timer \
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_(RETRANSMIT, "RETRANSMIT") \
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_(DELACK, "DELAYED ACK") \
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_(PERSIST, "PERSIST") \
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_(WAITCLOSE, "WAIT CLOSE") \
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_(RETRANSMIT_SYN, "RETRANSMIT SYN") \
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typedef enum _tcp_timers
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{
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#define _(sym, str) TCP_TIMER_##sym,
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foreach_tcp_timer
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#undef _
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TCP_N_TIMERS
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} tcp_timers_e;
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typedef void (timer_expiration_handler) (u32 index);
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extern timer_expiration_handler tcp_timer_delack_handler;
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extern timer_expiration_handler tcp_timer_retransmit_handler;
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extern timer_expiration_handler tcp_timer_persist_handler;
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extern timer_expiration_handler tcp_timer_retransmit_syn_handler;
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#define TCP_TIMER_HANDLE_INVALID ((u32) ~0)
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#define TCP_TIMER_TICK 0.1 /**< Timer tick in seconds */
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#define TCP_TO_TIMER_TICK TCP_TICK*10 /**< Factor for converting
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ticks to timer ticks */
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#define TCP_RTO_MAX 60 * THZ /* Min max RTO (60s) as per RFC6298 */
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#define TCP_RTO_MIN 0.2 * THZ /* Min RTO (200ms) - lower than standard */
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#define TCP_RTT_MAX 30 * THZ /* 30s (probably too much) */
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#define TCP_RTO_SYN_RETRIES 3 /* SYN retries without doubling RTO */
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#define TCP_RTO_INIT 1 * THZ /* Initial retransmit timer */
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#define TCP_RTO_BOFF_MAX 8 /* Max number of retries before reset */
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#define TCP_ESTABLISH_TIME (60 * THZ) /* Connection establish timeout */
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/** Connection configuration flags */
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#define foreach_tcp_cfg_flag \
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_(RATE_SAMPLE, "Rate sampling") \
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_(NO_CSUM_OFFLOAD, "No csum offload") \
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_(NO_TSO, "TSO off") \
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_(TSO, "TSO") \
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typedef enum tcp_cfg_flag_bits_
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{
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#define _(sym, str) TCP_CFG_F_##sym##_BIT,
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foreach_tcp_cfg_flag
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#undef _
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TCP_CFG_N_FLAG_BITS
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} tcp_cfg_flag_bits_e;
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typedef enum tcp_cfg_flag_
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{
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#define _(sym, str) TCP_CFG_F_##sym = 1 << TCP_CFG_F_##sym##_BIT,
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foreach_tcp_cfg_flag
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#undef _
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TCP_CFG_N_FLAGS
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} tcp_cfg_flags_e;
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/** TCP connection flags */
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#define foreach_tcp_connection_flag \
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_(SNDACK, "Send ACK") \
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_(FINSNT, "FIN sent") \
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_(RECOVERY, "Recovery") \
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_(FAST_RECOVERY, "Fast Recovery") \
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_(DCNT_PENDING, "Disconnect pending") \
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_(HALF_OPEN_DONE, "Half-open completed") \
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_(FINPNDG, "FIN pending") \
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_(RXT_PENDING, "Retransmit pending") \
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_(FRXT_FIRST, "Retransmit first") \
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_(DEQ_PENDING, "Dequeue pending ") \
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_(PSH_PENDING, "PSH pending") \
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_(FINRCVD, "FIN received") \
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_(ZERO_RWND_SENT, "Zero RWND sent") \
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typedef enum tcp_connection_flag_bits_
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{
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#define _(sym, str) TCP_CONN_##sym##_BIT,
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foreach_tcp_connection_flag
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#undef _
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TCP_CONN_N_FLAG_BITS
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} tcp_connection_flag_bits_e;
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typedef enum tcp_connection_flag_
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{
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#define _(sym, str) TCP_CONN_##sym = 1 << TCP_CONN_##sym##_BIT,
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foreach_tcp_connection_flag
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#undef _
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TCP_CONN_N_FLAGS
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} tcp_connection_flags_e;
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#define TCP_SCOREBOARD_TRACE (0)
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#define TCP_MAX_SACK_BLOCKS 256 /**< Max number of SACK blocks stored */
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#define TCP_INVALID_SACK_HOLE_INDEX ((u32)~0)
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typedef struct _scoreboard_trace_elt
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{
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u32 start;
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u32 end;
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u32 ack;
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u32 snd_una_max;
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u32 group;
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} scoreboard_trace_elt_t;
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typedef struct _sack_scoreboard_hole
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{
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u32 next; /**< Index for next entry in linked list */
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u32 prev; /**< Index for previous entry in linked list */
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u32 start; /**< Start sequence number */
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u32 end; /**< End sequence number */
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u8 is_lost; /**< Mark hole as lost */
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} sack_scoreboard_hole_t;
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typedef struct _sack_scoreboard
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{
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sack_scoreboard_hole_t *holes; /**< Pool of holes */
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u32 head; /**< Index of first entry */
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u32 tail; /**< Index of last entry */
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u32 sacked_bytes; /**< Number of bytes sacked in sb */
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u32 last_sacked_bytes; /**< Number of bytes last sacked */
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u32 last_bytes_delivered; /**< Sack bytes delivered to app */
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u32 rxt_sacked; /**< Rxt bytes last delivered */
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u32 high_sacked; /**< Highest byte sacked (fack) */
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u32 high_rxt; /**< Highest retransmitted sequence */
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u32 rescue_rxt; /**< Rescue sequence number */
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u32 lost_bytes; /**< Bytes lost as per RFC6675 */
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u32 last_lost_bytes; /**< Number of bytes last lost */
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u32 cur_rxt_hole; /**< Retransmitting from this hole */
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u8 is_reneging;
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#if TCP_SCOREBOARD_TRACE
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scoreboard_trace_elt_t *trace;
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#endif
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} sack_scoreboard_t;
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#if TCP_SCOREBOARD_TRACE
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#define tcp_scoreboard_trace_add(_tc, _ack) \
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{ \
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static u64 _group = 0; \
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sack_scoreboard_t *_sb = &_tc->sack_sb; \
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sack_block_t *_sack, *_sacks; \
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scoreboard_trace_elt_t *_elt; \
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int i; \
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_group++; \
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_sacks = _tc->rcv_opts.sacks; \
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for (i = 0; i < vec_len (_sacks); i++) \
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{ \
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_sack = &_sacks[i]; \
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vec_add2 (_sb->trace, _elt, 1); \
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_elt->start = _sack->start; \
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_elt->end = _sack->end; \
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_elt->ack = _elt->end == _ack ? _ack : 0; \
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_elt->snd_una_max = _elt->end == _ack ? _tc->snd_una_max : 0; \
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_elt->group = _group; \
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} \
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}
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#else
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#define tcp_scoreboard_trace_add(_tc, _ack)
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#endif
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sack_scoreboard_hole_t *scoreboard_next_rxt_hole (sack_scoreboard_t * sb,
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sack_scoreboard_hole_t *
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start, u8 have_sent_1_smss,
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u8 * can_rescue,
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u8 * snd_limited);
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sack_scoreboard_hole_t *scoreboard_get_hole (sack_scoreboard_t * sb,
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u32 index);
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sack_scoreboard_hole_t *scoreboard_next_hole (sack_scoreboard_t * sb,
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sack_scoreboard_hole_t * hole);
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sack_scoreboard_hole_t *scoreboard_prev_hole (sack_scoreboard_t * sb,
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sack_scoreboard_hole_t * hole);
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sack_scoreboard_hole_t *scoreboard_first_hole (sack_scoreboard_t * sb);
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sack_scoreboard_hole_t *scoreboard_last_hole (sack_scoreboard_t * sb);
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void scoreboard_clear (sack_scoreboard_t * sb);
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void scoreboard_clear_reneging (sack_scoreboard_t * sb, u32 start, u32 end);
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void scoreboard_init (sack_scoreboard_t * sb);
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void scoreboard_init_rxt (sack_scoreboard_t * sb, u32 snd_una);
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u8 *format_tcp_scoreboard (u8 * s, va_list * args);
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#define TCP_BTS_INVALID_INDEX ((u32)~0)
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typedef enum tcp_bts_flags_
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{
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TCP_BTS_IS_RXT = 1,
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TCP_BTS_IS_APP_LIMITED = 1 << 1,
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TCP_BTS_IS_SACKED = 1 << 2,
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TCP_BTS_IS_RXT_LOST = 1 << 3,
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} __clib_packed tcp_bts_flags_t;
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typedef struct tcp_bt_sample_
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{
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u32 next; /**< Next sample index in list */
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u32 prev; /**< Previous sample index in list */
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u32 min_seq; /**< Min seq number in sample */
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u32 max_seq; /**< Max seq number. Set for rxt samples */
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u64 delivered; /**< Total delivered bytes for sample */
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f64 delivered_time; /**< Delivered time when sample taken */
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f64 tx_time; /**< Transmit time for the burst */
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f64 first_tx_time; /**< Connection first tx time at tx */
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tcp_bts_flags_t flags; /**< Sample flag */
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} tcp_bt_sample_t;
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typedef struct tcp_rate_sample_
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{
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u64 prior_delivered; /**< Delivered of sample used for rate, i.e.,
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total bytes delivered at prior_time */
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f64 prior_time; /**< Delivered time of sample used for rate */
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f64 interval_time; /**< Time to ack the bytes delivered */
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f64 rtt_time; /**< RTT for sample */
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u32 delivered; /**< Bytes delivered in interval_time */
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u32 acked_and_sacked; /**< Bytes acked + sacked now */
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u32 lost; /**< Bytes lost now */
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tcp_bts_flags_t flags; /**< Rate sample flags from bt sample */
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} tcp_rate_sample_t;
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typedef struct tcp_byte_tracker_
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{
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tcp_bt_sample_t *samples; /**< Pool of samples */
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rb_tree_t sample_lookup; /**< Rbtree for sample lookup by min_seq */
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u32 head; /**< Head of samples linked list */
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u32 tail; /**< Tail of samples linked list */
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u32 last_ooo; /**< Cached last ooo sample */
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} tcp_byte_tracker_t;
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typedef enum _tcp_cc_algorithm_type
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{
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TCP_CC_NEWRENO,
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TCP_CC_CUBIC,
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TCP_CC_LAST = TCP_CC_CUBIC
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} tcp_cc_algorithm_type_e;
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typedef struct _tcp_cc_algorithm tcp_cc_algorithm_t;
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typedef enum _tcp_cc_ack_t
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{
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TCP_CC_ACK,
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TCP_CC_DUPACK,
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TCP_CC_PARTIALACK
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} tcp_cc_ack_t;
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typedef enum tcp_cc_event_
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{
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TCP_CC_EVT_START_TX,
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} tcp_cc_event_t;
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/*
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* As per RFC4898 tcpEStatsStackSoftErrors
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*/
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typedef struct tcp_errors_
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{
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u32 below_data_wnd; /**< All data in seg is below snd_una */
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u32 above_data_wnd; /**< Some data in segment is above snd_wnd */
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u32 below_ack_wnd; /**< Acks for data below snd_una */
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u32 above_ack_wnd; /**< Acks for data not sent */
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} tcp_errors_t;
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typedef struct _tcp_connection
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{
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CLIB_CACHE_LINE_ALIGN_MARK (cacheline0);
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transport_connection_t connection; /**< Common transport data. First! */
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u8 state; /**< TCP state as per tcp_state_t */
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u8 cfg_flags; /**< Connection configuration flags */
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u16 flags; /**< Connection flags (see tcp_conn_flags_e) */
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u32 timers[TCP_N_TIMERS]; /**< Timer handles into timer wheel */
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u64 segs_in; /** RFC4022/4898 tcpHCInSegs/tcpEStatsPerfSegsIn */
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u64 bytes_in; /** RFC4898 tcpEStatsPerfHCDataOctetsIn */
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u64 segs_out; /** RFC4898 tcpEStatsPerfSegsOut */
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u64 bytes_out; /** RFC4898 tcpEStatsPerfHCDataOctetsOut */
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/** Send sequence variables RFC793 */
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u32 snd_una; /**< oldest unacknowledged sequence number */
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u32 snd_una_max; /**< newest unacknowledged sequence number + 1*/
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u32 snd_wnd; /**< send window */
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u32 snd_wl1; /**< seq number used for last snd.wnd update */
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u32 snd_wl2; /**< ack number used for last snd.wnd update */
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u32 snd_nxt; /**< next seq number to be sent */
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u16 snd_mss; /**< Effective send max seg (data) size */
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u64 data_segs_in; /** RFC4898 tcpEStatsPerfDataSegsIn */
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u64 data_segs_out; /** RFC4898 tcpEStatsPerfDataSegsOut */
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/** Receive sequence variables RFC793 */
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u32 rcv_nxt; /**< next sequence number expected */
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u32 rcv_wnd; /**< receive window we expect */
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u32 rcv_las; /**< rcv_nxt at last ack sent/rcv_wnd update */
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u32 iss; /**< initial sent sequence */
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u32 irs; /**< initial remote sequence */
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/* Options */
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u8 snd_opts_len; /**< Tx options len */
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u8 rcv_wscale; /**< Window scale to advertise to peer */
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u8 snd_wscale; /**< Window scale to use when sending */
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u32 tsval_recent; /**< Last timestamp received */
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u32 tsval_recent_age; /**< When last updated tstamp_recent*/
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tcp_options_t snd_opts; /**< Tx options for connection */
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tcp_options_t rcv_opts; /**< Rx options for connection */
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sack_block_t *snd_sacks; /**< Vector of SACKs to send. XXX Fixed size? */
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u8 snd_sack_pos; /**< Position in vec of first block to send */
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sack_block_t *snd_sacks_fl; /**< Vector for building new list */
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sack_scoreboard_t sack_sb; /**< SACK "scoreboard" that tracks holes */
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u16 rcv_dupacks; /**< Number of recent DUPACKs received */
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u32 dupacks_in; /**< RFC4898 tcpEStatsStackDupAcksIn*/
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u8 pending_dupacks; /**< Number of DUPACKs to be sent */
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u32 dupacks_out; /**< RFC4898 tcpEStatsPathDupAcksOut */
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/* Congestion control */
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u32 cwnd; /**< Congestion window */
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u32 cwnd_acc_bytes; /**< Bytes accumulated for cwnd increment */
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u32 ssthresh; /**< Slow-start threshold */
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u32 prev_ssthresh; /**< ssthresh before congestion */
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u32 prev_cwnd; /**< ssthresh before congestion */
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u32 bytes_acked; /**< Bytes acknowledged by current segment */
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u32 burst_acked; /**< Bytes acknowledged in current burst */
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u32 snd_rxt_bytes; /**< Retransmitted bytes during current cc event */
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u32 snd_rxt_ts; /**< Timestamp when first packet is retransmitted */
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u32 prr_delivered; /**< RFC6937 bytes delivered during current event */
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u32 prr_start; /**< snd_una when prr starts */
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u32 rxt_delivered; /**< Rxt bytes delivered during current cc event */
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u32 rxt_head; /**< snd_una last time we re rxted the head */
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u32 prev_dsegs_out; /**< Number of dsegs after last ack */
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u32 tsecr_last_ack; /**< Timestamp echoed to us in last healthy ACK */
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u32 snd_congestion; /**< snd_una_max when congestion is detected */
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u32 tx_fifo_size; /**< Tx fifo size. Used to constrain cwnd */
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tcp_cc_algorithm_t *cc_algo; /**< Congestion control algorithm */
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u8 cc_data[TCP_CC_DATA_SZ]; /**< Congestion control algo private data */
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u32 fr_occurences; /**< fast-retransmit occurrences RFC4898
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tcpEStatsStackFastRetran */
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u32 tr_occurences; /**< timer-retransmit occurrences */
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u64 bytes_retrans; /**< RFC4898 tcpEStatsPerfOctetsRetrans */
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u64 segs_retrans; /**< RFC4898 tcpEStatsPerfSegsRetrans*/
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/* RTT and RTO */
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u32 rto; /**< Retransmission timeout */
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u32 rto_boff; /**< Index for RTO backoff */
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u32 srtt; /**< Smoothed RTT */
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u32 rttvar; /**< Smoothed mean RTT difference. Approximates variance */
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u32 rtt_seq; /**< Sequence number for tracked ACK */
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f64 rtt_ts; /**< Timestamp for tracked ACK */
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f64 mrtt_us; /**< High precision mrtt from tracked acks */
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u32 psh_seq; /**< Add psh header for seg that includes this */
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u32 next_node_index; /**< Can be used to control next node in output */
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u32 next_node_opaque; /**< Opaque to pass to next node */
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u32 limited_transmit; /**< snd_nxt when limited transmit starts */
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u32 sw_if_index; /**< Interface for the connection */
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/* Delivery rate estimation */
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u64 delivered; /**< Total bytes delivered to peer */
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u64 app_limited; /**< Delivered when app-limited detected */
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f64 delivered_time; /**< Time last bytes were acked */
|
|
f64 first_tx_time; /**< Send time for recently delivered/sent */
|
|
tcp_byte_tracker_t *bt; /**< Tx byte tracker */
|
|
|
|
tcp_errors_t errors; /**< Soft connection errors */
|
|
|
|
f64 start_ts; /**< Timestamp when connection initialized */
|
|
u32 last_fib_check; /**< Last time we checked fib route for peer */
|
|
u16 mss; /**< Our max seg size that includes options */
|
|
u32 timestamp_delta; /**< Offset for timestamp */
|
|
} tcp_connection_t;
|
|
|
|
/* *INDENT-OFF* */
|
|
struct _tcp_cc_algorithm
|
|
{
|
|
const char *name;
|
|
uword (*unformat_cfg) (unformat_input_t * input);
|
|
void (*init) (tcp_connection_t * tc);
|
|
void (*cleanup) (tcp_connection_t * tc);
|
|
void (*rcv_ack) (tcp_connection_t * tc, tcp_rate_sample_t *rs);
|
|
void (*rcv_cong_ack) (tcp_connection_t * tc, tcp_cc_ack_t ack,
|
|
tcp_rate_sample_t *rs);
|
|
void (*congestion) (tcp_connection_t * tc);
|
|
void (*loss) (tcp_connection_t * tc);
|
|
void (*recovered) (tcp_connection_t * tc);
|
|
void (*undo_recovery) (tcp_connection_t * tc);
|
|
void (*event) (tcp_connection_t *tc, tcp_cc_event_t evt);
|
|
u64 (*get_pacing_rate) (tcp_connection_t *tc);
|
|
};
|
|
/* *INDENT-ON* */
|
|
|
|
#define tcp_fastrecovery_on(tc) (tc)->flags |= TCP_CONN_FAST_RECOVERY
|
|
#define tcp_fastrecovery_off(tc) (tc)->flags &= ~TCP_CONN_FAST_RECOVERY
|
|
#define tcp_recovery_on(tc) (tc)->flags |= TCP_CONN_RECOVERY
|
|
#define tcp_recovery_off(tc) (tc)->flags &= ~TCP_CONN_RECOVERY
|
|
#define tcp_in_fastrecovery(tc) ((tc)->flags & TCP_CONN_FAST_RECOVERY)
|
|
#define tcp_in_recovery(tc) ((tc)->flags & (TCP_CONN_RECOVERY))
|
|
#define tcp_in_slowstart(tc) (tc->cwnd < tc->ssthresh)
|
|
#define tcp_disconnect_pending(tc) ((tc)->flags & TCP_CONN_DCNT_PENDING)
|
|
#define tcp_disconnect_pending_on(tc) ((tc)->flags |= TCP_CONN_DCNT_PENDING)
|
|
#define tcp_disconnect_pending_off(tc) ((tc)->flags &= ~TCP_CONN_DCNT_PENDING)
|
|
#define tcp_fastrecovery_first(tc) ((tc)->flags & TCP_CONN_FRXT_FIRST)
|
|
#define tcp_fastrecovery_first_on(tc) ((tc)->flags |= TCP_CONN_FRXT_FIRST)
|
|
#define tcp_fastrecovery_first_off(tc) ((tc)->flags &= ~TCP_CONN_FRXT_FIRST)
|
|
|
|
#define tcp_in_cong_recovery(tc) ((tc)->flags & \
|
|
(TCP_CONN_FAST_RECOVERY | TCP_CONN_RECOVERY))
|
|
|
|
#define tcp_csum_offload(tc) (!((tc)->cfg_flags & TCP_CFG_F_NO_CSUM_OFFLOAD))
|
|
|
|
always_inline void
|
|
tcp_cong_recovery_off (tcp_connection_t * tc)
|
|
{
|
|
tc->flags &= ~(TCP_CONN_FAST_RECOVERY | TCP_CONN_RECOVERY);
|
|
tcp_fastrecovery_first_off (tc);
|
|
}
|
|
|
|
#define tcp_zero_rwnd_sent(tc) ((tc)->flags & TCP_CONN_ZERO_RWND_SENT)
|
|
#define tcp_zero_rwnd_sent_on(tc) (tc)->flags |= TCP_CONN_ZERO_RWND_SENT
|
|
#define tcp_zero_rwnd_sent_off(tc) (tc)->flags &= ~TCP_CONN_ZERO_RWND_SENT
|
|
|
|
typedef enum _tcp_error
|
|
{
|
|
#define tcp_error(n,s) TCP_ERROR_##n,
|
|
#include <vnet/tcp/tcp_error.def>
|
|
#undef tcp_error
|
|
TCP_N_ERROR,
|
|
} tcp_error_t;
|
|
|
|
typedef struct _tcp_lookup_dispatch
|
|
{
|
|
u8 next, error;
|
|
} tcp_lookup_dispatch_t;
|
|
|
|
typedef struct tcp_worker_ctx_
|
|
{
|
|
CLIB_CACHE_LINE_ALIGN_MARK (cacheline0);
|
|
/** worker time */
|
|
u32 time_now;
|
|
|
|
/** worker timer wheel */
|
|
tw_timer_wheel_16t_2w_512sl_t timer_wheel;
|
|
|
|
/** tx buffer free list */
|
|
u32 *tx_buffers;
|
|
|
|
/** tx frames for ip 4/6 lookup nodes */
|
|
vlib_frame_t *ip_lookup_tx_frames[2];
|
|
|
|
/** vector of pending ack dequeues */
|
|
u32 *pending_deq_acked;
|
|
|
|
/** vector of pending disconnect notifications */
|
|
u32 *pending_disconnects;
|
|
|
|
/** convenience pointer to this thread's vlib main */
|
|
vlib_main_t *vm;
|
|
|
|
CLIB_CACHE_LINE_ALIGN_MARK (cacheline1);
|
|
|
|
/** cached 'on the wire' options for bursts */
|
|
u8 cached_opts[40];
|
|
|
|
} tcp_worker_ctx_t;
|
|
|
|
typedef struct tcp_iss_seed_
|
|
{
|
|
u64 first;
|
|
u64 second;
|
|
} tcp_iss_seed_t;
|
|
|
|
typedef struct tcp_configuration_
|
|
{
|
|
/** Max rx fifo size for a session (in bytes). It is used in to compute the
|
|
* rfc 7323 window scaling factor */
|
|
u32 max_rx_fifo;
|
|
|
|
/** Min rx fifo for a session (in bytes) */
|
|
u32 min_rx_fifo;
|
|
|
|
/** Default MTU to be used when establishing connections */
|
|
u16 default_mtu;
|
|
|
|
/** Initial CWND multiplier, which multiplies MSS to determine initial CWND.
|
|
* Set 0 to determine the initial CWND by another way */
|
|
u16 initial_cwnd_multiplier;
|
|
|
|
/** Enable tx pacing for new connections */
|
|
u8 enable_tx_pacing;
|
|
|
|
/** Allow use of TSO whenever available */
|
|
u8 allow_tso;
|
|
|
|
/** Default congestion control algorithm type */
|
|
tcp_cc_algorithm_type_e cc_algo;
|
|
|
|
/** Min rwnd, as number of snd_mss segments, for update ack to be sent after
|
|
* a zero rwnd advertisement */
|
|
u32 rwnd_min_update_ack;
|
|
|
|
/** Delayed ack time (disabled) */
|
|
u16 delack_time;
|
|
|
|
/** Timer ticks to wait for close from app */
|
|
u16 closewait_time;
|
|
|
|
/** Timer ticks to wait in time-wait. Also known as 2MSL */
|
|
u16 timewait_time;
|
|
|
|
/** Timer ticks to wait in fin-wait1 to send fin and rcv fin-ack */
|
|
u16 finwait1_time;
|
|
|
|
/** Timer ticks to wait in last ack for ack */
|
|
u16 lastack_time;
|
|
|
|
/** Timer ticks to wait in fin-wait2 for fin */
|
|
u16 finwait2_time;
|
|
|
|
/** Timer ticks to wait in closing for fin ack */
|
|
u16 closing_time;
|
|
|
|
/** Timer ticks to wait before cleaning up the connection */
|
|
u16 cleanup_time;
|
|
|
|
/** Number of preallocated connections */
|
|
u32 preallocated_connections;
|
|
|
|
/** Number of preallocated half-open connections */
|
|
u32 preallocated_half_open_connections;
|
|
|
|
/** Vectors of src addresses. Optional unless one needs > 63K active-opens */
|
|
ip4_address_t *ip4_src_addrs;
|
|
ip6_address_t *ip6_src_addrs;
|
|
|
|
/** Fault-injection. Debug only */
|
|
f64 buffer_fail_fraction;
|
|
} tcp_configuration_t;
|
|
|
|
typedef struct _tcp_main
|
|
{
|
|
/* Per-worker thread tcp connection pools */
|
|
tcp_connection_t **connections;
|
|
|
|
/* Pool of listeners. */
|
|
tcp_connection_t *listener_pool;
|
|
|
|
/** Dispatch table by state and flags */
|
|
tcp_lookup_dispatch_t dispatch_table[TCP_N_STATES][64];
|
|
|
|
u8 log2_tstamp_clocks_per_tick;
|
|
f64 tstamp_ticks_per_clock;
|
|
|
|
/** per-worker context */
|
|
tcp_worker_ctx_t *wrk_ctx;
|
|
|
|
/** Pool of half-open connections on which we've sent a SYN */
|
|
tcp_connection_t *half_open_connections;
|
|
clib_spinlock_t half_open_lock;
|
|
|
|
/** vlib buffer size */
|
|
u32 bytes_per_buffer;
|
|
|
|
/** Seed used to generate random iss */
|
|
tcp_iss_seed_t iss_seed;
|
|
|
|
/** Congestion control algorithms registered */
|
|
tcp_cc_algorithm_t *cc_algos;
|
|
|
|
/** Hash table of cc algorithms by name */
|
|
uword *cc_algo_by_name;
|
|
|
|
/** Last cc algo registered */
|
|
tcp_cc_algorithm_type_e cc_last_type;
|
|
|
|
/** Flag that indicates if stack is on or off */
|
|
u8 is_enabled;
|
|
|
|
/** Flag that indicates if v4 punting is enabled */
|
|
u8 punt_unknown4;
|
|
|
|
/** Flag that indicates if v6 punting is enabled */
|
|
u8 punt_unknown6;
|
|
|
|
/** Rotor for v4 source addresses */
|
|
u32 last_v4_addr_rotor;
|
|
|
|
/** Rotor for v6 source addresses */
|
|
u32 last_v6_addr_rotor;
|
|
|
|
/** Protocol configuration */
|
|
tcp_configuration_t cfg;
|
|
} tcp_main_t;
|
|
|
|
extern tcp_main_t tcp_main;
|
|
extern vlib_node_registration_t tcp4_input_node;
|
|
extern vlib_node_registration_t tcp6_input_node;
|
|
extern vlib_node_registration_t tcp4_output_node;
|
|
extern vlib_node_registration_t tcp6_output_node;
|
|
extern vlib_node_registration_t tcp4_established_node;
|
|
extern vlib_node_registration_t tcp6_established_node;
|
|
extern vlib_node_registration_t tcp4_syn_sent_node;
|
|
extern vlib_node_registration_t tcp6_syn_sent_node;
|
|
extern vlib_node_registration_t tcp4_rcv_process_node;
|
|
extern vlib_node_registration_t tcp6_rcv_process_node;
|
|
extern vlib_node_registration_t tcp4_listen_node;
|
|
extern vlib_node_registration_t tcp6_listen_node;
|
|
|
|
#define tcp_cfg tcp_main.cfg
|
|
#define tcp_node_index(node_id, is_ip4) \
|
|
((is_ip4) ? tcp4_##node_id##_node.index : tcp6_##node_id##_node.index)
|
|
|
|
always_inline tcp_main_t *
|
|
vnet_get_tcp_main ()
|
|
{
|
|
return &tcp_main;
|
|
}
|
|
|
|
always_inline tcp_worker_ctx_t *
|
|
tcp_get_worker (u32 thread_index)
|
|
{
|
|
return &tcp_main.wrk_ctx[thread_index];
|
|
}
|
|
|
|
always_inline tcp_header_t *
|
|
tcp_buffer_hdr (vlib_buffer_t * b)
|
|
{
|
|
ASSERT ((signed) b->current_data >= (signed) -VLIB_BUFFER_PRE_DATA_SIZE);
|
|
return (tcp_header_t *) (b->data + b->current_data
|
|
+ vnet_buffer (b)->tcp.hdr_offset);
|
|
}
|
|
|
|
#if (VLIB_BUFFER_TRACE_TRAJECTORY)
|
|
#define tcp_trajectory_add_start(b, start) \
|
|
{ \
|
|
(*vlib_buffer_trace_trajectory_cb) (b, start); \
|
|
}
|
|
#else
|
|
#define tcp_trajectory_add_start(b, start)
|
|
#endif
|
|
|
|
clib_error_t *vnet_tcp_enable_disable (vlib_main_t * vm, u8 is_en);
|
|
|
|
void tcp_punt_unknown (vlib_main_t * vm, u8 is_ip4, u8 is_add);
|
|
|
|
always_inline tcp_connection_t *
|
|
tcp_connection_get (u32 conn_index, u32 thread_index)
|
|
{
|
|
if (PREDICT_FALSE
|
|
(pool_is_free_index (tcp_main.connections[thread_index], conn_index)))
|
|
return 0;
|
|
return pool_elt_at_index (tcp_main.connections[thread_index], conn_index);
|
|
}
|
|
|
|
always_inline tcp_connection_t *
|
|
tcp_connection_get_if_valid (u32 conn_index, u32 thread_index)
|
|
{
|
|
if (tcp_main.connections[thread_index] == 0)
|
|
return 0;
|
|
if (pool_is_free_index (tcp_main.connections[thread_index], conn_index))
|
|
return 0;
|
|
return pool_elt_at_index (tcp_main.connections[thread_index], conn_index);
|
|
}
|
|
|
|
always_inline tcp_connection_t *
|
|
tcp_get_connection_from_transport (transport_connection_t * tconn)
|
|
{
|
|
return (tcp_connection_t *) tconn;
|
|
}
|
|
|
|
always_inline void
|
|
tcp_connection_set_state (tcp_connection_t * tc, tcp_state_t state)
|
|
{
|
|
tc->state = state;
|
|
TCP_EVT (TCP_EVT_STATE_CHANGE, tc);
|
|
}
|
|
|
|
void tcp_connection_close (tcp_connection_t * tc);
|
|
void tcp_connection_cleanup (tcp_connection_t * tc);
|
|
void tcp_connection_del (tcp_connection_t * tc);
|
|
int tcp_half_open_connection_cleanup (tcp_connection_t * tc);
|
|
tcp_connection_t *tcp_connection_alloc (u8 thread_index);
|
|
tcp_connection_t *tcp_connection_alloc_w_base (u8 thread_index,
|
|
tcp_connection_t * base);
|
|
void tcp_connection_free (tcp_connection_t * tc);
|
|
void tcp_connection_reset (tcp_connection_t * tc);
|
|
int tcp_configure_v4_source_address_range (vlib_main_t * vm,
|
|
ip4_address_t * start,
|
|
ip4_address_t * end, u32 table_id);
|
|
int tcp_configure_v6_source_address_range (vlib_main_t * vm,
|
|
ip6_address_t * start,
|
|
ip6_address_t * end, u32 table_id);
|
|
void tcp_api_reference (void);
|
|
u8 *format_tcp_connection (u8 * s, va_list * args);
|
|
|
|
always_inline tcp_connection_t *
|
|
tcp_listener_get (u32 tli)
|
|
{
|
|
return pool_elt_at_index (tcp_main.listener_pool, tli);
|
|
}
|
|
|
|
always_inline tcp_connection_t *
|
|
tcp_half_open_connection_get (u32 conn_index)
|
|
{
|
|
tcp_connection_t *tc = 0;
|
|
clib_spinlock_lock_if_init (&tcp_main.half_open_lock);
|
|
if (!pool_is_free_index (tcp_main.half_open_connections, conn_index))
|
|
tc = pool_elt_at_index (tcp_main.half_open_connections, conn_index);
|
|
clib_spinlock_unlock_if_init (&tcp_main.half_open_lock);
|
|
return tc;
|
|
}
|
|
|
|
void tcp_make_fin (tcp_connection_t * tc, vlib_buffer_t * b);
|
|
void tcp_make_synack (tcp_connection_t * ts, vlib_buffer_t * b);
|
|
void tcp_send_reset_w_pkt (tcp_connection_t * tc, vlib_buffer_t * pkt,
|
|
u32 thread_index, u8 is_ip4);
|
|
void tcp_send_reset (tcp_connection_t * tc);
|
|
void tcp_send_syn (tcp_connection_t * tc);
|
|
void tcp_send_synack (tcp_connection_t * tc);
|
|
void tcp_send_fin (tcp_connection_t * tc);
|
|
void tcp_send_ack (tcp_connection_t * tc);
|
|
void tcp_update_burst_snd_vars (tcp_connection_t * tc);
|
|
void tcp_update_rto (tcp_connection_t * tc);
|
|
void tcp_flush_frames_to_output (tcp_worker_ctx_t * wrk);
|
|
void tcp_send_window_update_ack (tcp_connection_t * tc);
|
|
|
|
void tcp_program_ack (tcp_connection_t * tc);
|
|
void tcp_program_dupack (tcp_connection_t * tc);
|
|
void tcp_program_retransmit (tcp_connection_t * tc);
|
|
|
|
/*
|
|
* Rate estimation
|
|
*/
|
|
|
|
/**
|
|
* Byte tracker initialize
|
|
*
|
|
* @param tc connection for which the byte tracker should be allocated and
|
|
* initialized
|
|
*/
|
|
void tcp_bt_init (tcp_connection_t * tc);
|
|
/**
|
|
* Byte tracker cleanup
|
|
*
|
|
* @param tc connection for which the byte tracker should be cleaned up
|
|
*/
|
|
void tcp_bt_cleanup (tcp_connection_t * tc);
|
|
/**
|
|
* Flush byte tracker samples
|
|
*
|
|
* @param tc tcp connection for which samples should be flushed
|
|
*/
|
|
void tcp_bt_flush_samples (tcp_connection_t * tc);
|
|
/**
|
|
* Track a tcp tx burst
|
|
*
|
|
* @param tc tcp connection
|
|
*/
|
|
void tcp_bt_track_tx (tcp_connection_t * tc, u32 len);
|
|
/**
|
|
* Track a tcp retransmission
|
|
*
|
|
* @param tc tcp connection
|
|
* @param start start sequence number
|
|
* @param end end sequence number
|
|
*/
|
|
void tcp_bt_track_rxt (tcp_connection_t * tc, u32 start, u32 end);
|
|
/**
|
|
* Generate a delivery rate sample from recently acked bytes
|
|
*
|
|
* @param tc tcp connection
|
|
* @param rs resulting rate sample
|
|
*/
|
|
void tcp_bt_sample_delivery_rate (tcp_connection_t * tc,
|
|
tcp_rate_sample_t * rs);
|
|
/**
|
|
* Check if sample to be generated is app limited
|
|
*
|
|
* @param tc tcp connection
|
|
*/
|
|
void tcp_bt_check_app_limited (tcp_connection_t * tc);
|
|
/**
|
|
* Check if the byte tracker is in sane state
|
|
*
|
|
* Should be used only for testing
|
|
*
|
|
* @param bt byte tracker
|
|
*/
|
|
int tcp_bt_is_sane (tcp_byte_tracker_t * bt);
|
|
u8 *format_tcp_bt (u8 * s, va_list * args);
|
|
|
|
always_inline u32
|
|
tcp_end_seq (tcp_header_t * th, u32 len)
|
|
{
|
|
return th->seq_number + tcp_is_syn (th) + tcp_is_fin (th) + len;
|
|
}
|
|
|
|
/* Modulo arithmetic for TCP sequence numbers */
|
|
#define seq_lt(_s1, _s2) ((i32)((_s1)-(_s2)) < 0)
|
|
#define seq_leq(_s1, _s2) ((i32)((_s1)-(_s2)) <= 0)
|
|
#define seq_gt(_s1, _s2) ((i32)((_s1)-(_s2)) > 0)
|
|
#define seq_geq(_s1, _s2) ((i32)((_s1)-(_s2)) >= 0)
|
|
#define seq_max(_s1, _s2) (seq_gt((_s1), (_s2)) ? (_s1) : (_s2))
|
|
|
|
/* Modulo arithmetic for timestamps */
|
|
#define timestamp_lt(_t1, _t2) ((i32)((_t1)-(_t2)) < 0)
|
|
#define timestamp_leq(_t1, _t2) ((i32)((_t1)-(_t2)) <= 0)
|
|
|
|
/**
|
|
* Our estimate of the number of bytes that have left the network
|
|
*/
|
|
always_inline u32
|
|
tcp_bytes_out (const tcp_connection_t * tc)
|
|
{
|
|
if (tcp_opts_sack_permitted (&tc->rcv_opts))
|
|
return tc->sack_sb.sacked_bytes + tc->sack_sb.lost_bytes;
|
|
else
|
|
return tc->rcv_dupacks * tc->snd_mss;
|
|
}
|
|
|
|
/**
|
|
* Our estimate of the number of bytes in flight (pipe size)
|
|
*/
|
|
always_inline u32
|
|
tcp_flight_size (const tcp_connection_t * tc)
|
|
{
|
|
int flight_size;
|
|
|
|
flight_size = (int) (tc->snd_nxt - tc->snd_una) - tcp_bytes_out (tc)
|
|
+ tc->snd_rxt_bytes - tc->rxt_delivered;
|
|
|
|
ASSERT (flight_size >= 0);
|
|
|
|
return flight_size;
|
|
}
|
|
|
|
/**
|
|
* Initial cwnd as per RFC5681
|
|
*/
|
|
always_inline u32
|
|
tcp_initial_cwnd (const tcp_connection_t * tc)
|
|
{
|
|
if (tcp_cfg.initial_cwnd_multiplier > 0)
|
|
return tcp_cfg.initial_cwnd_multiplier * tc->snd_mss;
|
|
|
|
if (tc->snd_mss > 2190)
|
|
return 2 * tc->snd_mss;
|
|
else if (tc->snd_mss > 1095)
|
|
return 3 * tc->snd_mss;
|
|
else
|
|
return 4 * tc->snd_mss;
|
|
}
|
|
|
|
/*
|
|
* Accumulate acked bytes for cwnd increase
|
|
*
|
|
* Once threshold bytes are accumulated, snd_mss bytes are added
|
|
* to the cwnd.
|
|
*/
|
|
always_inline void
|
|
tcp_cwnd_accumulate (tcp_connection_t * tc, u32 thresh, u32 bytes)
|
|
{
|
|
tc->cwnd_acc_bytes += bytes;
|
|
if (tc->cwnd_acc_bytes >= thresh)
|
|
{
|
|
u32 inc = tc->cwnd_acc_bytes / thresh;
|
|
tc->cwnd_acc_bytes -= inc * thresh;
|
|
tc->cwnd += inc * tc->snd_mss;
|
|
tc->cwnd = clib_min (tc->cwnd, tc->tx_fifo_size);
|
|
}
|
|
}
|
|
|
|
always_inline u32
|
|
tcp_loss_wnd (const tcp_connection_t * tc)
|
|
{
|
|
/* Whatever we have in flight + the packet we're about to send */
|
|
return tcp_flight_size (tc) + tc->snd_mss;
|
|
}
|
|
|
|
always_inline u32
|
|
tcp_available_snd_wnd (const tcp_connection_t * tc)
|
|
{
|
|
return clib_min (tc->cwnd, tc->snd_wnd);
|
|
}
|
|
|
|
always_inline u32
|
|
tcp_available_output_snd_space (const tcp_connection_t * tc)
|
|
{
|
|
u32 available_wnd = tcp_available_snd_wnd (tc);
|
|
int flight_size = (int) (tc->snd_nxt - tc->snd_una);
|
|
|
|
if (available_wnd <= flight_size)
|
|
return 0;
|
|
|
|
return available_wnd - flight_size;
|
|
}
|
|
|
|
/**
|
|
* Estimate of how many bytes we can still push into the network
|
|
*/
|
|
always_inline u32
|
|
tcp_available_cc_snd_space (const tcp_connection_t * tc)
|
|
{
|
|
u32 available_wnd = tcp_available_snd_wnd (tc);
|
|
u32 flight_size = tcp_flight_size (tc);
|
|
|
|
if (available_wnd <= flight_size)
|
|
return 0;
|
|
|
|
return available_wnd - flight_size;
|
|
}
|
|
|
|
always_inline u8
|
|
tcp_is_lost_fin (tcp_connection_t * tc)
|
|
{
|
|
if ((tc->flags & TCP_CONN_FINSNT) && (tc->snd_una_max - tc->snd_una == 1))
|
|
return 1;
|
|
return 0;
|
|
}
|
|
|
|
u32 tcp_snd_space (tcp_connection_t * tc);
|
|
int tcp_fastrecovery_prr_snd_space (tcp_connection_t * tc);
|
|
|
|
fib_node_index_t tcp_lookup_rmt_in_fib (tcp_connection_t * tc);
|
|
|
|
/* Made public for unit testing only */
|
|
void tcp_update_sack_list (tcp_connection_t * tc, u32 start, u32 end);
|
|
u32 tcp_sack_list_bytes (tcp_connection_t * tc);
|
|
|
|
always_inline u32
|
|
tcp_time_now (void)
|
|
{
|
|
return tcp_main.wrk_ctx[vlib_get_thread_index ()].time_now;
|
|
}
|
|
|
|
always_inline u32
|
|
tcp_time_now_w_thread (u32 thread_index)
|
|
{
|
|
return tcp_main.wrk_ctx[thread_index].time_now;
|
|
}
|
|
|
|
/**
|
|
* Generate timestamp for tcp connection
|
|
*/
|
|
always_inline u32
|
|
tcp_tstamp (tcp_connection_t * tc)
|
|
{
|
|
return (tcp_main.wrk_ctx[tc->c_thread_index].time_now -
|
|
tc->timestamp_delta);
|
|
}
|
|
|
|
always_inline f64
|
|
tcp_time_now_us (u32 thread_index)
|
|
{
|
|
return transport_time_now (thread_index);
|
|
}
|
|
|
|
always_inline u32
|
|
tcp_set_time_now (tcp_worker_ctx_t * wrk)
|
|
{
|
|
wrk->time_now = clib_cpu_time_now () * tcp_main.tstamp_ticks_per_clock;
|
|
return wrk->time_now;
|
|
}
|
|
|
|
u32 tcp_session_push_header (transport_connection_t * tconn,
|
|
vlib_buffer_t * b);
|
|
int tcp_session_custom_tx (void *conn, u32 max_burst_size);
|
|
|
|
void tcp_connection_timers_init (tcp_connection_t * tc);
|
|
void tcp_connection_timers_reset (tcp_connection_t * tc);
|
|
void tcp_init_snd_vars (tcp_connection_t * tc);
|
|
void tcp_connection_init_vars (tcp_connection_t * tc);
|
|
void tcp_connection_tx_pacer_update (tcp_connection_t * tc);
|
|
void tcp_connection_tx_pacer_reset (tcp_connection_t * tc, u32 window,
|
|
u32 start_bucket);
|
|
|
|
always_inline void
|
|
tcp_cc_rcv_ack (tcp_connection_t * tc, tcp_rate_sample_t * rs)
|
|
{
|
|
tc->cc_algo->rcv_ack (tc, rs);
|
|
tc->tsecr_last_ack = tc->rcv_opts.tsecr;
|
|
}
|
|
|
|
static inline void
|
|
tcp_cc_rcv_cong_ack (tcp_connection_t * tc, tcp_cc_ack_t ack_type,
|
|
tcp_rate_sample_t * rs)
|
|
{
|
|
tc->cc_algo->rcv_cong_ack (tc, ack_type, rs);
|
|
}
|
|
|
|
static inline void
|
|
tcp_cc_congestion (tcp_connection_t * tc)
|
|
{
|
|
tc->cc_algo->congestion (tc);
|
|
}
|
|
|
|
static inline void
|
|
tcp_cc_loss (tcp_connection_t * tc)
|
|
{
|
|
tc->cc_algo->loss (tc);
|
|
}
|
|
|
|
static inline void
|
|
tcp_cc_recovered (tcp_connection_t * tc)
|
|
{
|
|
tc->cc_algo->recovered (tc);
|
|
}
|
|
|
|
static inline void
|
|
tcp_cc_undo_recovery (tcp_connection_t * tc)
|
|
{
|
|
if (tc->cc_algo->undo_recovery)
|
|
tc->cc_algo->undo_recovery (tc);
|
|
}
|
|
|
|
static inline void
|
|
tcp_cc_event (tcp_connection_t * tc, tcp_cc_event_t evt)
|
|
{
|
|
if (tc->cc_algo->event)
|
|
tc->cc_algo->event (tc, evt);
|
|
}
|
|
|
|
static inline u64
|
|
tcp_cc_get_pacing_rate (tcp_connection_t * tc)
|
|
{
|
|
if (tc->cc_algo->get_pacing_rate)
|
|
return tc->cc_algo->get_pacing_rate (tc);
|
|
|
|
f64 srtt = clib_min ((f64) tc->srtt * TCP_TICK, tc->mrtt_us);
|
|
|
|
/* TODO should constrain to interface's max throughput but
|
|
* we don't have link speeds for sw ifs ..*/
|
|
return ((f64) tc->cwnd / srtt);
|
|
}
|
|
|
|
always_inline void
|
|
tcp_timer_set (tcp_connection_t * tc, u8 timer_id, u32 interval)
|
|
{
|
|
ASSERT (tc->c_thread_index == vlib_get_thread_index ());
|
|
ASSERT (tc->timers[timer_id] == TCP_TIMER_HANDLE_INVALID);
|
|
tc->timers[timer_id] =
|
|
tw_timer_start_16t_2w_512sl (&tcp_main.
|
|
wrk_ctx[tc->c_thread_index].timer_wheel,
|
|
tc->c_c_index, timer_id, interval);
|
|
}
|
|
|
|
always_inline void
|
|
tcp_timer_reset (tcp_connection_t * tc, u8 timer_id)
|
|
{
|
|
ASSERT (tc->c_thread_index == vlib_get_thread_index ());
|
|
if (tc->timers[timer_id] == TCP_TIMER_HANDLE_INVALID)
|
|
return;
|
|
|
|
tw_timer_stop_16t_2w_512sl (&tcp_main.
|
|
wrk_ctx[tc->c_thread_index].timer_wheel,
|
|
tc->timers[timer_id]);
|
|
tc->timers[timer_id] = TCP_TIMER_HANDLE_INVALID;
|
|
}
|
|
|
|
always_inline void
|
|
tcp_timer_update (tcp_connection_t * tc, u8 timer_id, u32 interval)
|
|
{
|
|
ASSERT (tc->c_thread_index == vlib_get_thread_index ());
|
|
if (tc->timers[timer_id] != TCP_TIMER_HANDLE_INVALID)
|
|
tw_timer_update_16t_2w_512sl (&tcp_main.
|
|
wrk_ctx[tc->c_thread_index].timer_wheel,
|
|
tc->timers[timer_id], interval);
|
|
else
|
|
tc->timers[timer_id] =
|
|
tw_timer_start_16t_2w_512sl (&tcp_main.
|
|
wrk_ctx[tc->c_thread_index].timer_wheel,
|
|
tc->c_c_index, timer_id, interval);
|
|
}
|
|
|
|
always_inline void
|
|
tcp_retransmit_timer_set (tcp_connection_t * tc)
|
|
{
|
|
ASSERT (tc->snd_una != tc->snd_una_max);
|
|
tcp_timer_set (tc, TCP_TIMER_RETRANSMIT,
|
|
clib_max (tc->rto * TCP_TO_TIMER_TICK, 1));
|
|
}
|
|
|
|
always_inline void
|
|
tcp_retransmit_timer_reset (tcp_connection_t * tc)
|
|
{
|
|
tcp_timer_reset (tc, TCP_TIMER_RETRANSMIT);
|
|
}
|
|
|
|
always_inline void
|
|
tcp_retransmit_timer_force_update (tcp_connection_t * tc)
|
|
{
|
|
tcp_timer_update (tc, TCP_TIMER_RETRANSMIT,
|
|
clib_max (tc->rto * TCP_TO_TIMER_TICK, 1));
|
|
}
|
|
|
|
always_inline void
|
|
tcp_persist_timer_set (tcp_connection_t * tc)
|
|
{
|
|
/* Reuse RTO. It's backed off in handler */
|
|
tcp_timer_set (tc, TCP_TIMER_PERSIST,
|
|
clib_max (tc->rto * TCP_TO_TIMER_TICK, 1));
|
|
}
|
|
|
|
always_inline void
|
|
tcp_persist_timer_update (tcp_connection_t * tc)
|
|
{
|
|
tcp_timer_update (tc, TCP_TIMER_PERSIST,
|
|
clib_max (tc->rto * TCP_TO_TIMER_TICK, 1));
|
|
}
|
|
|
|
always_inline void
|
|
tcp_persist_timer_reset (tcp_connection_t * tc)
|
|
{
|
|
tcp_timer_reset (tc, TCP_TIMER_PERSIST);
|
|
}
|
|
|
|
always_inline void
|
|
tcp_retransmit_timer_update (tcp_connection_t * tc)
|
|
{
|
|
if (tc->snd_una == tc->snd_nxt)
|
|
{
|
|
tcp_retransmit_timer_reset (tc);
|
|
if (tc->snd_wnd < tc->snd_mss)
|
|
tcp_persist_timer_update (tc);
|
|
}
|
|
else
|
|
tcp_timer_update (tc, TCP_TIMER_RETRANSMIT,
|
|
clib_max (tc->rto * TCP_TO_TIMER_TICK, 1));
|
|
}
|
|
|
|
always_inline u8
|
|
tcp_timer_is_active (tcp_connection_t * tc, tcp_timers_e timer)
|
|
{
|
|
return tc->timers[timer] != TCP_TIMER_HANDLE_INVALID;
|
|
}
|
|
|
|
#define tcp_validate_txf_size(_tc, _a) \
|
|
ASSERT(_tc->state != TCP_STATE_ESTABLISHED \
|
|
|| transport_max_tx_dequeue (&_tc->connection) >= _a)
|
|
|
|
void tcp_rcv_sacks (tcp_connection_t * tc, u32 ack);
|
|
u8 *tcp_scoreboard_replay (u8 * s, tcp_connection_t * tc, u8 verbose);
|
|
|
|
/**
|
|
* Register exiting cc algo type
|
|
*/
|
|
void tcp_cc_algo_register (tcp_cc_algorithm_type_e type,
|
|
const tcp_cc_algorithm_t * vft);
|
|
|
|
/**
|
|
* Register new cc algo type
|
|
*/
|
|
tcp_cc_algorithm_type_e tcp_cc_algo_new_type (const tcp_cc_algorithm_t * vft);
|
|
tcp_cc_algorithm_t *tcp_cc_algo_get (tcp_cc_algorithm_type_e type);
|
|
|
|
static inline void *
|
|
tcp_cc_data (tcp_connection_t * tc)
|
|
{
|
|
return (void *) tc->cc_data;
|
|
}
|
|
|
|
void newreno_rcv_cong_ack (tcp_connection_t * tc, tcp_cc_ack_t ack_type,
|
|
tcp_rate_sample_t * rs);
|
|
|
|
/**
|
|
* Push TCP header to buffer
|
|
*
|
|
* @param vm - vlib_main
|
|
* @param b - buffer to write the header to
|
|
* @param sp_net - source port net order
|
|
* @param dp_net - destination port net order
|
|
* @param seq - sequence number net order
|
|
* @param ack - ack number net order
|
|
* @param tcp_hdr_opts_len - header and options length in bytes
|
|
* @param flags - header flags
|
|
* @param wnd - window size
|
|
*
|
|
* @return - pointer to start of TCP header
|
|
*/
|
|
always_inline void *
|
|
vlib_buffer_push_tcp_net_order (vlib_buffer_t * b, u16 sp, u16 dp, u32 seq,
|
|
u32 ack, u8 tcp_hdr_opts_len, u8 flags,
|
|
u16 wnd)
|
|
{
|
|
tcp_header_t *th;
|
|
|
|
th = vlib_buffer_push_uninit (b, tcp_hdr_opts_len);
|
|
|
|
th->src_port = sp;
|
|
th->dst_port = dp;
|
|
th->seq_number = seq;
|
|
th->ack_number = ack;
|
|
th->data_offset_and_reserved = (tcp_hdr_opts_len >> 2) << 4;
|
|
th->flags = flags;
|
|
th->window = wnd;
|
|
th->checksum = 0;
|
|
th->urgent_pointer = 0;
|
|
vnet_buffer (b)->l4_hdr_offset = (u8 *) th - b->data;
|
|
b->flags |= VNET_BUFFER_F_L4_HDR_OFFSET_VALID;
|
|
return th;
|
|
}
|
|
|
|
/**
|
|
* Push TCP header to buffer
|
|
*
|
|
* @param b - buffer to write the header to
|
|
* @param sp_net - source port net order
|
|
* @param dp_net - destination port net order
|
|
* @param seq - sequence number host order
|
|
* @param ack - ack number host order
|
|
* @param tcp_hdr_opts_len - header and options length in bytes
|
|
* @param flags - header flags
|
|
* @param wnd - window size
|
|
*
|
|
* @return - pointer to start of TCP header
|
|
*/
|
|
always_inline void *
|
|
vlib_buffer_push_tcp (vlib_buffer_t * b, u16 sp_net, u16 dp_net, u32 seq,
|
|
u32 ack, u8 tcp_hdr_opts_len, u8 flags, u16 wnd)
|
|
{
|
|
return vlib_buffer_push_tcp_net_order (b, sp_net, dp_net,
|
|
clib_host_to_net_u32 (seq),
|
|
clib_host_to_net_u32 (ack),
|
|
tcp_hdr_opts_len, flags,
|
|
clib_host_to_net_u16 (wnd));
|
|
}
|
|
|
|
#endif /* _vnet_tcp_h_ */
|
|
|
|
/*
|
|
* fd.io coding-style-patch-verification: ON
|
|
*
|
|
* Local Variables:
|
|
* eval: (c-set-style "gnu")
|
|
* End:
|
|
*/
|