Include dependency graph for tcp.h:

This graph shows which files directly or indirectly include this file:

Data Structures
struct	tcp_bt_sample_

struct	tcp_rate_sample_

struct	tcp_byte_tracker_

struct	tcp_errors_

struct	tcp_worker_ctx_

struct	tcp_iss_seed_

struct	tcp_configuration_

Macros
#define	TCP_TICK 0.001
	TCP tick period (s) More...

#define	THZ (u32) (1/TCP_TICK)
	TCP tick frequency. More...

#define	TCP_TSTAMP_RESOLUTION TCP_TICK
	Time stamp resolution. More...

#define	TCP_PAWS_IDLE 24 * 24 * 60 * 60 * THZ
	24 days More...

#define	TCP_FIB_RECHECK_PERIOD 1 * THZ
	Recheck every 1s. More...

#define	TCP_MAX_OPTION_SPACE 40

#define	TCP_CC_DATA_SZ 24

#define	TCP_MAX_GSO_SZ 65536

#define	TCP_RXT_MAX_BURST 10

#define	TCP_DUPACK_THRESHOLD 3

#define	TCP_IW_N_SEGMENTS 10

#define	TCP_ALWAYS_ACK 1
	On/off delayed acks. More...

#define	TCP_USE_SACKS 1
	Disable only for testing. More...

#define	foreach_tcp_fsm_state
	TCP FSM state definitions as per RFC793. More...

#define	foreach_tcp_timer
	TCP timers. More...

#define	TCP_TIMER_HANDLE_INVALID ((u32) ~0)

#define	TCP_TIMER_TICK 0.1
	Timer tick in seconds. More...

#define	TCP_TO_TIMER_TICK TCP_TICK*10
	Factor for converting ticks to timer ticks. More...

#define	TCP_RTO_MAX 60 * THZ /* Min max RTO (60s) as per RFC6298 */

#define	TCP_RTO_MIN 0.2 * THZ /* Min RTO (200ms) - lower than standard */

#define	TCP_RTT_MAX 30 * THZ /* 30s (probably too much) */

#define	TCP_RTO_SYN_RETRIES 3 /* SYN retries without doubling RTO */

#define	TCP_RTO_INIT 1 * THZ /* Initial retransmit timer */

#define	TCP_RTO_BOFF_MAX 8 /* Max number of retries before reset */

#define	TCP_ESTABLISH_TIME (60 * THZ) /* Connection establish timeout */

#define	foreach_tcp_cfg_flag
	Connection configuration flags. More...

#define	foreach_tcp_connection_flag
	TCP connection flags. More...

#define	TCP_SCOREBOARD_TRACE (0)

#define	TCP_MAX_SACK_BLOCKS 256
	Max number of SACK blocks stored. More...

#define	TCP_INVALID_SACK_HOLE_INDEX ((u32)~0)

#define	tcp_scoreboard_trace_add(_tc, _ack)

#define	TCP_BTS_INVALID_INDEX ((u32)~0)

#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)

#define	tcp_csum_offload(tc) (!((tc)->cfg_flags & TCP_CFG_F_NO_CSUM_OFFLOAD))

#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

#define	tcp_error(n, s) TCP_ERROR_##n,

#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)

#define	tcp_trajectory_add_start(b, start)

#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))

#define	timestamp_lt(_t1, _t2) ((i32)((_t1)-(_t2)) < 0)

#define	timestamp_leq(_t1, _t2) ((i32)((_t1)-(_t2)) <= 0)

#define	tcp_validate_txf_size(_tc, _a)

Typedefs
typedef enum _tcp_state	tcp_state_t

typedef enum _tcp_timers	tcp_timers_e

typedef void()	timer_expiration_handler(u32 index, u32 thread_index)

typedef enum tcp_cfg_flag_bits_	tcp_cfg_flag_bits_e

typedef enum tcp_cfg_flag_	tcp_cfg_flags_e

typedef enum tcp_connection_flag_bits_	tcp_connection_flag_bits_e

typedef enum tcp_connection_flag_	tcp_connection_flags_e

typedef struct _scoreboard_trace_elt	scoreboard_trace_elt_t

typedef struct _sack_scoreboard_hole	sack_scoreboard_hole_t

typedef struct _sack_scoreboard	sack_scoreboard_t

typedef enum tcp_bts_flags_	tcp_bts_flags_t

typedef struct tcp_bt_sample_	tcp_bt_sample_t

typedef struct tcp_rate_sample_	tcp_rate_sample_t

typedef struct tcp_byte_tracker_	tcp_byte_tracker_t

typedef enum _tcp_cc_algorithm_type	tcp_cc_algorithm_type_e

typedef struct _tcp_cc_algorithm	tcp_cc_algorithm_t

typedef enum _tcp_cc_ack_t	tcp_cc_ack_t

typedef enum tcp_cc_event_	tcp_cc_event_t

typedef struct tcp_errors_	tcp_errors_t

typedef struct _tcp_connection	tcp_connection_t

typedef enum _tcp_error	tcp_error_t

typedef struct _tcp_lookup_dispatch	tcp_lookup_dispatch_t

typedef struct tcp_worker_ctx_	tcp_worker_ctx_t

typedef struct tcp_iss_seed_	tcp_iss_seed_t

typedef struct tcp_configuration_	tcp_configuration_t

typedef struct _tcp_main	tcp_main_t

Enumerations
enum	tcp_cfg_flag_bits_ { TCP_CFG_N_FLAG_BITS }

enum	tcp_cfg_flag_ { TCP_CFG_N_FLAGS }

enum	tcp_connection_flag_bits_ { TCP_CONN_N_FLAG_BITS }

enum	tcp_connection_flag_ { TCP_CONN_N_FLAGS }

enum	tcp_bts_flags_ { TCP_BTS_IS_RXT = 1, TCP_BTS_IS_APP_LIMITED = 1 << 1, TCP_BTS_IS_SACKED = 1 << 2, TCP_BTS_IS_RXT_LOST = 1 << 3 }

enum	tcp_cc_event_ { TCP_CC_EVT_START_TX }

Functions
sack_scoreboard_hole_t *	scoreboard_next_rxt_hole (sack_scoreboard_t sb, sack_scoreboard_hole_t start, u8 have_sent_1_smss, u8 can_rescue, u8 snd_limited)
	Figure out the next hole to retransmit. More...

sack_scoreboard_hole_t *	scoreboard_get_hole (sack_scoreboard_t *sb, u32 index)

sack_scoreboard_hole_t *	scoreboard_next_hole (sack_scoreboard_t sb, sack_scoreboard_hole_t hole)

sack_scoreboard_hole_t *	scoreboard_prev_hole (sack_scoreboard_t sb, sack_scoreboard_hole_t hole)

sack_scoreboard_hole_t *	scoreboard_first_hole (sack_scoreboard_t *sb)

sack_scoreboard_hole_t *	scoreboard_last_hole (sack_scoreboard_t *sb)

void	scoreboard_clear (sack_scoreboard_t *sb)

void	scoreboard_clear_reneging (sack_scoreboard_t *sb, u32 start, u32 end)

void	scoreboard_init (sack_scoreboard_t *sb)

void	scoreboard_init_rxt (sack_scoreboard_t *sb, u32 snd_una)

u8 *	format_tcp_scoreboard (u8 s, va_list args)

static void	tcp_cong_recovery_off (tcp_connection_t *tc)

static tcp_main_t *	vnet_get_tcp_main ()

static tcp_worker_ctx_t *	tcp_get_worker (u32 thread_index)

static tcp_header_t *	tcp_buffer_hdr (vlib_buffer_t *b)

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)

static tcp_connection_t *	tcp_connection_get (u32 conn_index, u32 thread_index)

static tcp_connection_t *	tcp_connection_get_if_valid (u32 conn_index, u32 thread_index)

static tcp_connection_t *	tcp_get_connection_from_transport (transport_connection_t *tconn)

static void	tcp_connection_set_state (tcp_connection_t *tc, tcp_state_t state)

void	tcp_connection_close (tcp_connection_t *tc)
	Begin connection closing procedure. More...

void	tcp_connection_cleanup (tcp_connection_t *tc)
	Cleans up connection state. More...

void	tcp_connection_del (tcp_connection_t *tc)
	Connection removal. More...

int	tcp_half_open_connection_cleanup (tcp_connection_t *tc)
	Try to cleanup half-open connection. More...

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)
	Notify session that connection has been reset. More...

int	tcp_configure_v4_source_address_range (vlib_main_t vm, ip4_address_t start, ip4_address_t *end, u32 table_id)
	Configure an ipv4 source address range. More...

int	tcp_configure_v6_source_address_range (vlib_main_t vm, ip6_address_t start, ip6_address_t *end, u32 table_id)
	Configure an ipv6 source address range. More...

void	tcp_api_reference (void)

u8 *	format_tcp_connection (u8 s, va_list args)

u8 *	format_tcp_connection_id (u8 s, va_list args)

static tcp_connection_t *	tcp_listener_get (u32 tli)

static tcp_connection_t *	tcp_half_open_connection_get (u32 conn_index)

void	tcp_make_fin (tcp_connection_t tc, vlib_buffer_t b)
	Convert buffer to FIN-ACK. More...

void	tcp_make_synack (tcp_connection_t ts, vlib_buffer_t b)
	Convert buffer to SYN-ACK. More...

void	tcp_send_reset_w_pkt (tcp_connection_t tc, vlib_buffer_t pkt, u32 thread_index, u8 is_ip4)
	Send reset without reusing existing buffer. More...

void	tcp_send_reset (tcp_connection_t *tc)
	Build and set reset packet for connection. More...

void	tcp_send_syn (tcp_connection_t *tc)
	Send SYN. More...

void	tcp_send_synack (tcp_connection_t *tc)

void	tcp_send_fin (tcp_connection_t *tc)
	Send FIN. More...

void	tcp_send_ack (tcp_connection_t *tc)

void	tcp_update_burst_snd_vars (tcp_connection_t *tc)
	Update burst send vars. More...

void	tcp_update_rto (tcp_connection_t *tc)

void	tcp_flush_frames_to_output (tcp_worker_ctx_t *wrk)
	Flush v4 and v6 tcp and ip-lookup tx frames for thread index. More...

void	tcp_send_window_update_ack (tcp_connection_t *tc)
	Send window update ack. More...

void	tcp_program_ack (tcp_connection_t *tc)

void	tcp_program_dupack (tcp_connection_t *tc)

void	tcp_program_retransmit (tcp_connection_t *tc)

void	tcp_bt_init (tcp_connection_t *tc)
	Byte tracker initialize. More...

void	tcp_bt_cleanup (tcp_connection_t *tc)
	Byte tracker cleanup. More...

void	tcp_bt_flush_samples (tcp_connection_t *tc)
	Flush byte tracker samples. More...

void	tcp_bt_track_tx (tcp_connection_t *tc, u32 len)
	Track a tcp tx burst. More...

void	tcp_bt_track_rxt (tcp_connection_t *tc, u32 start, u32 end)
	Track a tcp retransmission. More...

void	tcp_bt_sample_delivery_rate (tcp_connection_t tc, tcp_rate_sample_t rs)
	Generate a delivery rate sample from recently acked bytes. More...

void	tcp_bt_check_app_limited (tcp_connection_t *tc)
	Check if sample to be generated is app limited. More...

int	tcp_bt_is_sane (tcp_byte_tracker_t *bt)
	Check if the byte tracker is in sane state. More...

u8 *	format_tcp_bt (u8 s, va_list args)

static u32	tcp_end_seq (tcp_header_t *th, u32 len)

static u32	tcp_bytes_out (const tcp_connection_t *tc)
	Our estimate of the number of bytes that have left the network. More...

static u32	tcp_flight_size (const tcp_connection_t *tc)
	Our estimate of the number of bytes in flight (pipe size) More...

static u32	tcp_initial_cwnd (const tcp_connection_t *tc)
	Initial cwnd as per RFC5681. More...

static void	tcp_cwnd_accumulate (tcp_connection_t *tc, u32 thresh, u32 bytes)

static u32	tcp_loss_wnd (const tcp_connection_t *tc)

static u32	tcp_available_snd_wnd (const tcp_connection_t *tc)

static u32	tcp_available_output_snd_space (const tcp_connection_t *tc)

static u32	tcp_available_cc_snd_space (const tcp_connection_t *tc)
	Estimate of how many bytes we can still push into the network. More...

static u8	tcp_is_lost_fin (tcp_connection_t *tc)

u32	tcp_snd_space (tcp_connection_t *tc)

int	tcp_fastrecovery_prr_snd_space (tcp_connection_t *tc)
	Estimate send space using proportional rate reduction (RFC6937) More...

fib_node_index_t	tcp_lookup_rmt_in_fib (tcp_connection_t *tc)

void	tcp_update_sack_list (tcp_connection_t *tc, u32 start, u32 end)
	Build SACK list as per RFC2018. More...

u32	tcp_sack_list_bytes (tcp_connection_t *tc)

static u32	tcp_time_now (void)

static u32	tcp_time_now_w_thread (u32 thread_index)

static u32	tcp_tstamp (tcp_connection_t *tc)
	Generate timestamp for tcp connection. More...

static f64	tcp_time_now_us (u32 thread_index)

static u32	tcp_set_time_now (tcp_worker_ctx_t *wrk)

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)
	Initialize all connection timers as invalid. More...

void	tcp_connection_timers_reset (tcp_connection_t *tc)
	Stop all connection timers. More...

void	tcp_init_snd_vars (tcp_connection_t *tc)
	Initialize connection send variables. More...

void	tcp_connection_init_vars (tcp_connection_t *tc)
	Initialize tcp connection variables. More...

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)

static void	tcp_cc_rcv_ack (tcp_connection_t tc, tcp_rate_sample_t rs)

static void	tcp_cc_rcv_cong_ack (tcp_connection_t tc, tcp_cc_ack_t ack_type, tcp_rate_sample_t rs)

static void	tcp_cc_congestion (tcp_connection_t *tc)

static void	tcp_cc_loss (tcp_connection_t *tc)

static void	tcp_cc_recovered (tcp_connection_t *tc)

static void	tcp_cc_undo_recovery (tcp_connection_t *tc)

static void	tcp_cc_event (tcp_connection_t *tc, tcp_cc_event_t evt)

static u64	tcp_cc_get_pacing_rate (tcp_connection_t *tc)

static void	tcp_timer_set (tcp_connection_t *tc, u8 timer_id, u32 interval)

static void	tcp_timer_reset (tcp_connection_t *tc, u8 timer_id)

static void	tcp_timer_update (tcp_connection_t *tc, u8 timer_id, u32 interval)

static void	tcp_retransmit_timer_set (tcp_connection_t *tc)

static void	tcp_retransmit_timer_reset (tcp_connection_t *tc)

static void	tcp_retransmit_timer_force_update (tcp_connection_t *tc)

static void	tcp_persist_timer_set (tcp_connection_t *tc)

static void	tcp_persist_timer_update (tcp_connection_t *tc)

static void	tcp_persist_timer_reset (tcp_connection_t *tc)

static void	tcp_retransmit_timer_update (tcp_connection_t *tc)

static u8	tcp_timer_is_active (tcp_connection_t *tc, tcp_timers_e timer)

void	tcp_rcv_sacks (tcp_connection_t *tc, u32 ack)

u8 *	tcp_scoreboard_replay (u8 s, tcp_connection_t tc, u8 verbose)

void	tcp_cc_algo_register (tcp_cc_algorithm_type_e type, const tcp_cc_algorithm_t *vft)
	Register exiting cc algo type. More...

tcp_cc_algorithm_type_e	tcp_cc_algo_new_type (const tcp_cc_algorithm_t *vft)
	Register new cc algo type. More...

tcp_cc_algorithm_t *	tcp_cc_algo_get (tcp_cc_algorithm_type_e type)

static void *	tcp_cc_data (tcp_connection_t *tc)

void	newreno_rcv_cong_ack (tcp_connection_t tc, tcp_cc_ack_t ack_type, tcp_rate_sample_t rs)

static 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)
	Push TCP header to buffer. More...

static 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)
	Push TCP header to buffer. More...

Variables
format_function_t	format_tcp_state

format_function_t	format_tcp_flags

format_function_t	format_tcp_sacks

format_function_t	format_tcp_rcv_sacks

timer_expiration_handler	tcp_timer_delack_handler

timer_expiration_handler	tcp_timer_retransmit_handler

timer_expiration_handler	tcp_timer_persist_handler

timer_expiration_handler	tcp_timer_retransmit_syn_handler

tcp_main_t	tcp_main

vlib_node_registration_t	tcp4_input_node
	(constructor) VLIB_REGISTER_NODE (tcp4_input_node) More...

vlib_node_registration_t	tcp6_input_node
	(constructor) VLIB_REGISTER_NODE (tcp6_input_node) More...

vlib_node_registration_t	tcp4_output_node
	(constructor) VLIB_REGISTER_NODE (tcp4_output_node) More...

vlib_node_registration_t	tcp6_output_node
	(constructor) VLIB_REGISTER_NODE (tcp6_output_node) More...

vlib_node_registration_t	tcp4_established_node
	(constructor) VLIB_REGISTER_NODE (tcp4_established_node) More...

vlib_node_registration_t	tcp6_established_node
	(constructor) VLIB_REGISTER_NODE (tcp6_established_node) More...

vlib_node_registration_t	tcp4_syn_sent_node
	(constructor) VLIB_REGISTER_NODE (tcp4_syn_sent_node) More...

vlib_node_registration_t	tcp6_syn_sent_node
	(constructor) VLIB_REGISTER_NODE (tcp6_syn_sent_node) More...

vlib_node_registration_t	tcp4_rcv_process_node
	(constructor) VLIB_REGISTER_NODE (tcp4_rcv_process_node) More...

vlib_node_registration_t	tcp6_rcv_process_node
	(constructor) VLIB_REGISTER_NODE (tcp6_rcv_process_node) More...

vlib_node_registration_t	tcp4_listen_node
	(constructor) VLIB_REGISTER_NODE (tcp4_listen_node) More...

vlib_node_registration_t	tcp6_listen_node
	(constructor) VLIB_REGISTER_NODE (tcp6_listen_node) More...

Macro Definition Documentation

◆ foreach_tcp_cfg_flag

#define foreach_tcp_cfg_flag

Value:

_(RATE_SAMPLE, "Rate sampling")         \
  _(NO_CSUM_OFFLOAD, "No csum offload")         \
  _(NO_TSO, "TSO off")                          \
  _(TSO, "TSO")                                 \

Connection configuration flags.

Definition at line 108 of file tcp.h.

◆ foreach_tcp_connection_flag

#define foreach_tcp_connection_flag

Value:

_(SNDACK, "Send ACK")                         \
  _(FINSNT, "FIN sent")                         \
  _(RECOVERY, "Recovery")                       \
  _(FAST_RECOVERY, "Fast Recovery")             \
  _(DCNT_PENDING, "Disconnect pending")         \
  _(HALF_OPEN_DONE, "Half-open completed")      \
  _(FINPNDG, "FIN pending")                     \
  _(RXT_PENDING, "Retransmit pending")          \
  _(FRXT_FIRST, "Retransmit first")             \
  _(DEQ_PENDING, "Dequeue pending ")            \
  _(PSH_PENDING, "PSH pending")                 \
  _(FINRCVD, "FIN received")                    \
  _(ZERO_RWND_SENT, "Zero RWND sent")           \

TCP connection flags.

Definition at line 131 of file tcp.h.

◆ foreach_tcp_fsm_state

#define foreach_tcp_fsm_state

Value:

_(CLOSED, "CLOSED")           \
  _(LISTEN, "LISTEN")           \
  _(SYN_SENT, "SYN_SENT")       \
  _(SYN_RCVD, "SYN_RCVD")       \
  _(ESTABLISHED, "ESTABLISHED") \
  _(CLOSE_WAIT, "CLOSE_WAIT")   \
  _(FIN_WAIT_1, "FIN_WAIT_1")   \
  _(LAST_ACK, "LAST_ACK")       \
  _(CLOSING, "CLOSING")         \
  _(FIN_WAIT_2, "FIN_WAIT_2")   \
  _(TIME_WAIT, "TIME_WAIT")

TCP FSM state definitions as per RFC793.

Definition at line 43 of file tcp.h.

◆ foreach_tcp_timer

#define foreach_tcp_timer

Value:

_(RETRANSMIT, "RETRANSMIT")           \
  _(DELACK, "DELAYED ACK")              \
  _(PERSIST, "PERSIST")                 \
  _(WAITCLOSE, "WAIT CLOSE")            \
  _(RETRANSMIT_SYN, "RETRANSMIT SYN")   \

TCP timers.

Definition at line 70 of file tcp.h.

◆ seq_geq

#define seq_geq	(	_s1,
		_s2
	)	((i32)((_s1)-(_s2)) >= 0)

Definition at line 876 of file tcp.h.

◆ seq_gt

#define seq_gt	(	_s1,
		_s2
	)	((i32)((_s1)-(_s2)) > 0)

Definition at line 875 of file tcp.h.

◆ seq_leq

#define seq_leq	(	_s1,
		_s2
	)	((i32)((_s1)-(_s2)) <= 0)

Definition at line 874 of file tcp.h.

◆ seq_lt

#define seq_lt	(	_s1,
		_s2
	)	((i32)((_s1)-(_s2)) < 0)

Definition at line 873 of file tcp.h.

◆ seq_max

#define seq_max	(	_s1,
		_s2
	)	(seq_gt((_s1), (_s2)) ? (_s1) : (_s2))

Definition at line 877 of file tcp.h.

◆ TCP_ALWAYS_ACK

#define TCP_ALWAYS_ACK 1

On/off delayed acks.

Definition at line 39 of file tcp.h.

◆ TCP_BTS_INVALID_INDEX

#define TCP_BTS_INVALID_INDEX ((u32)~0)

Definition at line 253 of file tcp.h.

◆ TCP_CC_DATA_SZ

#define TCP_CC_DATA_SZ 24

Definition at line 33 of file tcp.h.

◆ tcp_cfg

#define tcp_cfg tcp_main.cfg

Definition at line 679 of file tcp.h.

◆ tcp_csum_offload

#define tcp_csum_offload ( tc ) (!((tc)->cfg_flags & TCP_CFG_F_NO_CSUM_OFFLOAD))

Definition at line 477 of file tcp.h.

◆ tcp_disconnect_pending

#define tcp_disconnect_pending ( tc ) ((tc)->flags & TCP_CONN_DCNT_PENDING)

Definition at line 467 of file tcp.h.

◆ tcp_disconnect_pending_off

#define tcp_disconnect_pending_off ( tc ) ((tc)->flags &= ~TCP_CONN_DCNT_PENDING)

Definition at line 469 of file tcp.h.

◆ tcp_disconnect_pending_on

#define tcp_disconnect_pending_on ( tc ) ((tc)->flags |= TCP_CONN_DCNT_PENDING)

Definition at line 468 of file tcp.h.

◆ TCP_DUPACK_THRESHOLD

#define TCP_DUPACK_THRESHOLD 3

Definition at line 37 of file tcp.h.

◆ tcp_error

#define tcp_error	(	n,
		s
	)	TCP_ERROR_##n,

Definition at line 492 of file tcp.h.

◆ TCP_ESTABLISH_TIME

#define TCP_ESTABLISH_TIME (60 * THZ) /* Connection establish timeout */

Definition at line 105 of file tcp.h.

◆ tcp_fastrecovery_first

#define tcp_fastrecovery_first ( tc ) ((tc)->flags & TCP_CONN_FRXT_FIRST)

Definition at line 470 of file tcp.h.

◆ tcp_fastrecovery_first_off

#define tcp_fastrecovery_first_off ( tc ) ((tc)->flags &= ~TCP_CONN_FRXT_FIRST)

Definition at line 472 of file tcp.h.

◆ tcp_fastrecovery_first_on

#define tcp_fastrecovery_first_on ( tc ) ((tc)->flags |= TCP_CONN_FRXT_FIRST)

Definition at line 471 of file tcp.h.

◆ tcp_fastrecovery_off

#define tcp_fastrecovery_off ( tc ) (tc)->flags &= ~TCP_CONN_FAST_RECOVERY

Definition at line 461 of file tcp.h.

◆ tcp_fastrecovery_on

#define tcp_fastrecovery_on ( tc ) (tc)->flags |= TCP_CONN_FAST_RECOVERY

Definition at line 460 of file tcp.h.

◆ TCP_FIB_RECHECK_PERIOD

#define TCP_FIB_RECHECK_PERIOD 1 * THZ

Recheck every 1s.

Definition at line 31 of file tcp.h.

◆ tcp_in_cong_recovery

#define tcp_in_cong_recovery ( tc )

Value:

((tc)->flags & \

(TCP_CONN_FAST_RECOVERY | TCP_CONN_RECOVERY))

flags

u32 flags

Definition: vhost_user.h:141

Definition at line 474 of file tcp.h.

◆ tcp_in_fastrecovery

#define tcp_in_fastrecovery ( tc ) ((tc)->flags & TCP_CONN_FAST_RECOVERY)

Definition at line 464 of file tcp.h.

◆ tcp_in_recovery

#define tcp_in_recovery ( tc ) ((tc)->flags & (TCP_CONN_RECOVERY))

Definition at line 465 of file tcp.h.

◆ tcp_in_slowstart

#define tcp_in_slowstart ( tc ) (tc->cwnd < tc->ssthresh)

Definition at line 466 of file tcp.h.

◆ TCP_INVALID_SACK_HOLE_INDEX

#define TCP_INVALID_SACK_HOLE_INDEX ((u32)~0)

Definition at line 164 of file tcp.h.

◆ TCP_IW_N_SEGMENTS

#define TCP_IW_N_SEGMENTS 10

Definition at line 38 of file tcp.h.

◆ TCP_MAX_GSO_SZ

#define TCP_MAX_GSO_SZ 65536

Definition at line 34 of file tcp.h.

◆ TCP_MAX_OPTION_SPACE

#define TCP_MAX_OPTION_SPACE 40

Definition at line 32 of file tcp.h.

◆ TCP_MAX_SACK_BLOCKS

#define TCP_MAX_SACK_BLOCKS 256

Max number of SACK blocks stored.

Definition at line 163 of file tcp.h.

◆ tcp_node_index

#define tcp_node_index	(	node_id,
		is_ip4
	)	((is_ip4) ? tcp4_##node_id##_node.index : tcp6_##node_id##_node.index)

Definition at line 680 of file tcp.h.

◆ TCP_PAWS_IDLE

#define TCP_PAWS_IDLE 24 * 24 * 60 * 60 * THZ

24 days

Definition at line 30 of file tcp.h.

◆ tcp_recovery_off

#define tcp_recovery_off ( tc ) (tc)->flags &= ~TCP_CONN_RECOVERY

Definition at line 463 of file tcp.h.

◆ tcp_recovery_on

#define tcp_recovery_on ( tc ) (tc)->flags |= TCP_CONN_RECOVERY

Definition at line 462 of file tcp.h.

◆ TCP_RTO_BOFF_MAX

#define TCP_RTO_BOFF_MAX 8 /* Max number of retries before reset */

Definition at line 104 of file tcp.h.

◆ TCP_RTO_INIT

#define TCP_RTO_INIT 1 * THZ /* Initial retransmit timer */

Definition at line 103 of file tcp.h.

◆ TCP_RTO_MAX

#define TCP_RTO_MAX 60 * THZ /* Min max RTO (60s) as per RFC6298 */

Definition at line 99 of file tcp.h.

◆ TCP_RTO_MIN

#define TCP_RTO_MIN 0.2 * THZ /* Min RTO (200ms) - lower than standard */

Definition at line 100 of file tcp.h.

◆ TCP_RTO_SYN_RETRIES

#define TCP_RTO_SYN_RETRIES 3 /* SYN retries without doubling RTO */

Definition at line 102 of file tcp.h.

◆ TCP_RTT_MAX

#define TCP_RTT_MAX 30 * THZ /* 30s (probably too much) */

Definition at line 101 of file tcp.h.

◆ TCP_RXT_MAX_BURST

#define TCP_RXT_MAX_BURST 10

Definition at line 35 of file tcp.h.

◆ TCP_SCOREBOARD_TRACE

#define TCP_SCOREBOARD_TRACE (0)

Definition at line 162 of file tcp.h.

◆ tcp_scoreboard_trace_add

#define tcp_scoreboard_trace_add	(	_tc,
		_ack
	)

Definition at line 229 of file tcp.h.

◆ TCP_TICK

#define TCP_TICK 0.001

TCP tick period (s)

Definition at line 27 of file tcp.h.

◆ TCP_TIMER_HANDLE_INVALID

#define TCP_TIMER_HANDLE_INVALID ((u32) ~0)

Definition at line 92 of file tcp.h.

◆ TCP_TIMER_TICK

#define TCP_TIMER_TICK 0.1

Timer tick in seconds.

Definition at line 94 of file tcp.h.

◆ TCP_TO_TIMER_TICK

#define TCP_TO_TIMER_TICK TCP_TICK*10

Factor for converting ticks to timer ticks.

Definition at line 95 of file tcp.h.

◆ tcp_trajectory_add_start

#define tcp_trajectory_add_start	(	b,
		start
	)

Definition at line 709 of file tcp.h.

◆ TCP_TSTAMP_RESOLUTION

#define TCP_TSTAMP_RESOLUTION TCP_TICK

Time stamp resolution.

Definition at line 29 of file tcp.h.

◆ TCP_USE_SACKS

#define TCP_USE_SACKS 1

Disable only for testing.

Definition at line 40 of file tcp.h.

◆ tcp_validate_txf_size

#define tcp_validate_txf_size	(	_tc,
		_a
	)

Value:

ASSERT(_tc->state != TCP_STATE_ESTABLISHED \

|| transport_max_tx_dequeue (&_tc->connection) >= _a)

transport_max_tx_dequeue

static u32 transport_max_tx_dequeue(transport_connection_t *tc)

Definition: session.h:478

ASSERT

#define ASSERT(truth)

Definition: error_bootstrap.h:69

Definition at line 1218 of file tcp.h.

◆ tcp_zero_rwnd_sent

#define tcp_zero_rwnd_sent ( tc ) ((tc)->flags & TCP_CONN_ZERO_RWND_SENT)

Definition at line 486 of file tcp.h.

◆ tcp_zero_rwnd_sent_off

#define tcp_zero_rwnd_sent_off ( tc ) (tc)->flags &= ~TCP_CONN_ZERO_RWND_SENT

Definition at line 488 of file tcp.h.

◆ tcp_zero_rwnd_sent_on

#define tcp_zero_rwnd_sent_on ( tc ) (tc)->flags |= TCP_CONN_ZERO_RWND_SENT

Definition at line 487 of file tcp.h.

◆ THZ

#define THZ (u32) (1/TCP_TICK)

TCP tick frequency.

Definition at line 28 of file tcp.h.

◆ timestamp_leq

#define timestamp_leq	(	_t1,
		_t2
	)	((i32)((_t1)-(_t2)) <= 0)

Definition at line 881 of file tcp.h.

◆ timestamp_lt

#define timestamp_lt	(	_t1,
		_t2
	)	((i32)((_t1)-(_t2)) < 0)

Definition at line 880 of file tcp.h.

Typedef Documentation

◆ sack_scoreboard_hole_t

typedef struct _sack_scoreboard_hole sack_scoreboard_hole_t

◆ sack_scoreboard_t

typedef struct _sack_scoreboard sack_scoreboard_t

◆ scoreboard_trace_elt_t

typedef struct _scoreboard_trace_elt scoreboard_trace_elt_t

◆ tcp_bt_sample_t

typedef struct tcp_bt_sample_ tcp_bt_sample_t

◆ tcp_bts_flags_t

typedef enum tcp_bts_flags_ tcp_bts_flags_t

◆ tcp_byte_tracker_t

typedef struct tcp_byte_tracker_ tcp_byte_tracker_t

◆ tcp_cc_ack_t

typedef enum _tcp_cc_ack_t tcp_cc_ack_t

◆ tcp_cc_algorithm_t

typedef struct _tcp_cc_algorithm tcp_cc_algorithm_t

Definition at line 305 of file tcp.h.

◆ tcp_cc_algorithm_type_e

typedef enum _tcp_cc_algorithm_type tcp_cc_algorithm_type_e

◆ tcp_cc_event_t

typedef enum tcp_cc_event_ tcp_cc_event_t

◆ tcp_cfg_flag_bits_e

typedef enum tcp_cfg_flag_bits_ tcp_cfg_flag_bits_e

◆ tcp_cfg_flags_e

typedef enum tcp_cfg_flag_ tcp_cfg_flags_e

◆ tcp_configuration_t

typedef struct tcp_configuration_ tcp_configuration_t

◆ tcp_connection_flag_bits_e

typedef enum tcp_connection_flag_bits_ tcp_connection_flag_bits_e

◆ tcp_connection_flags_e

typedef enum tcp_connection_flag_ tcp_connection_flags_e

◆ tcp_connection_t

typedef struct _tcp_connection tcp_connection_t

◆ tcp_error_t

typedef enum _tcp_error tcp_error_t

◆ tcp_errors_t

typedef struct tcp_errors_ tcp_errors_t

◆ tcp_iss_seed_t

typedef struct tcp_iss_seed_ tcp_iss_seed_t

◆ tcp_lookup_dispatch_t

typedef struct _tcp_lookup_dispatch tcp_lookup_dispatch_t

◆ tcp_main_t

typedef struct _tcp_main tcp_main_t

◆ tcp_rate_sample_t

typedef struct tcp_rate_sample_ tcp_rate_sample_t

◆ tcp_state_t

typedef enum _tcp_state tcp_state_t

◆ tcp_timers_e

typedef enum _tcp_timers tcp_timers_e

◆ tcp_worker_ctx_t

typedef struct tcp_worker_ctx_ tcp_worker_ctx_t

◆ timer_expiration_handler

typedef void() timer_expiration_handler(u32 index, u32 thread_index)

Definition at line 85 of file tcp.h.

Enumeration Type Documentation

◆ tcp_bts_flags_

enum tcp_bts_flags_

Enumerator
TCP_BTS_IS_RXT
TCP_BTS_IS_APP_LIMITED
TCP_BTS_IS_SACKED
TCP_BTS_IS_RXT_LOST

Definition at line 255 of file tcp.h.

◆ tcp_cc_event_

enum tcp_cc_event_

Enumerator
TCP_CC_EVT_START_TX

Definition at line 314 of file tcp.h.

◆ tcp_cfg_flag_

enum tcp_cfg_flag_

Enumerator
TCP_CFG_N_FLAGS

Definition at line 122 of file tcp.h.

◆ tcp_cfg_flag_bits_

enum tcp_cfg_flag_bits_

Enumerator
TCP_CFG_N_FLAG_BITS

Definition at line 114 of file tcp.h.

◆ tcp_connection_flag_

enum tcp_connection_flag_

Enumerator
TCP_CONN_N_FLAGS

Definition at line 154 of file tcp.h.

◆ tcp_connection_flag_bits_

enum tcp_connection_flag_bits_

Enumerator
TCP_CONN_N_FLAG_BITS

Definition at line 146 of file tcp.h.

Function Documentation

◆ format_tcp_bt()

u8* format_tcp_bt	(	u8 *	s,
		va_list *	args
	)

Definition at line 676 of file tcp_bt.c.

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◆ format_tcp_connection()

u8* format_tcp_connection	(	u8 *	s,
		va_list *	args
	)

Definition at line 1064 of file tcp.c.

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◆ format_tcp_connection_id()

u8* format_tcp_connection_id	(	u8 *	s,
		va_list *	args
	)

Definition at line 1040 of file tcp.c.

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◆ format_tcp_scoreboard()

u8* format_tcp_scoreboard	(	u8 *	s,
		va_list *	args
	)

Definition at line 1181 of file tcp.c.

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◆ newreno_rcv_cong_ack()

void newreno_rcv_cong_ack	(	tcp_connection_t *	tc,
		tcp_cc_ack_t	ack_type,
		tcp_rate_sample_t *	rs
	)

Definition at line 61 of file tcp_newreno.c.

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◆ scoreboard_clear()

void scoreboard_clear ( sack_scoreboard_t * sb )

Definition at line 927 of file tcp_input.c.

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◆ scoreboard_clear_reneging()

void scoreboard_clear_reneging	(	sack_scoreboard_t *	sb,
		u32	start,
		u32	end
	)

Definition at line 946 of file tcp_input.c.

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◆ scoreboard_first_hole()

sack_scoreboard_hole_t* scoreboard_first_hole ( sack_scoreboard_t * sb )

Definition at line 673 of file tcp_input.c.

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◆ scoreboard_get_hole()

sack_scoreboard_hole_t* scoreboard_get_hole	(	sack_scoreboard_t *	sb,
		u32	index
	)

Definition at line 649 of file tcp_input.c.

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◆ scoreboard_init()

void scoreboard_init ( sack_scoreboard_t * sb )

Definition at line 919 of file tcp_input.c.

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◆ scoreboard_init_rxt()

void scoreboard_init_rxt	(	sack_scoreboard_t *	sb,
		u32	snd_una
	)

Definition at line 905 of file tcp_input.c.

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◆ scoreboard_last_hole()

sack_scoreboard_hole_t* scoreboard_last_hole ( sack_scoreboard_t * sb )

Definition at line 681 of file tcp_input.c.

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◆ scoreboard_next_hole()

sack_scoreboard_hole_t* scoreboard_next_hole	(	sack_scoreboard_t *	sb,
		sack_scoreboard_hole_t *	hole
	)

Definition at line 657 of file tcp_input.c.

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◆ scoreboard_next_rxt_hole()

sack_scoreboard_hole_t* scoreboard_next_rxt_hole	(	sack_scoreboard_t *	sb,
		sack_scoreboard_hole_t *	start,
		u8	have_unsent,
		u8 *	can_rescue,
		u8 *	snd_limited
	)

Figure out the next hole to retransmit.

Follows logic proposed in RFC6675 Sec. 4, NextSeg()

Definition at line 845 of file tcp_input.c.

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◆ scoreboard_prev_hole()

sack_scoreboard_hole_t* scoreboard_prev_hole	(	sack_scoreboard_t *	sb,
		sack_scoreboard_hole_t *	hole
	)

Definition at line 665 of file tcp_input.c.

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◆ tcp_api_reference()

void tcp_api_reference ( void )

Definition at line 119 of file tcp_api.c.

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◆ tcp_available_cc_snd_space()

static u32 tcp_available_cc_snd_space ( const tcp_connection_t * tc )

inlinestatic

Estimate of how many bytes we can still push into the network.

Definition at line 977 of file tcp.h.

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◆ tcp_available_output_snd_space()

static u32 tcp_available_output_snd_space ( const tcp_connection_t * tc )

inlinestatic

Definition at line 962 of file tcp.h.

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◆ tcp_available_snd_wnd()

static u32 tcp_available_snd_wnd ( const tcp_connection_t * tc )

inlinestatic

Definition at line 956 of file tcp.h.

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◆ tcp_bt_check_app_limited()

void tcp_bt_check_app_limited ( tcp_connection_t * tc )

Check if sample to be generated is app limited.

Parameters

tc	tcp connection

Definition at line 282 of file tcp_bt.c.

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◆ tcp_bt_cleanup()

void tcp_bt_cleanup ( tcp_connection_t * tc )

Byte tracker cleanup.

Parameters

tc	connection for which the byte tracker should be cleaned up

Definition at line 639 of file tcp_bt.c.

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◆ tcp_bt_flush_samples()

void tcp_bt_flush_samples ( tcp_connection_t * tc )

Flush byte tracker samples.

Parameters

tc	tcp connection for which samples should be flushed

Definition at line 614 of file tcp_bt.c.

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◆ tcp_bt_init()

void tcp_bt_init ( tcp_connection_t * tc )

Byte tracker initialize.

Parameters

tc	connection for which the byte tracker should be allocated and initialized

Definition at line 650 of file tcp_bt.c.

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◆ tcp_bt_is_sane()

int tcp_bt_is_sane ( tcp_byte_tracker_t * bt )

Check if the byte tracker is in sane state.

Should be used only for testing

Parameters

bt	byte tracker

Definition at line 213 of file tcp_bt.c.

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◆ tcp_bt_sample_delivery_rate()

void tcp_bt_sample_delivery_rate	(	tcp_connection_t *	tc,
		tcp_rate_sample_t *	rs
	)

Generate a delivery rate sample from recently acked bytes.

Parameters

tc	tcp connection
rs	resulting rate sample

Definition at line 582 of file tcp_bt.c.

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◆ tcp_bt_track_rxt()

void tcp_bt_track_rxt	(	tcp_connection_t *	tc,
		u32	start,
		u32	end
	)

Track a tcp retransmission.

Parameters

tc	tcp connection
start	start sequence number
end	end sequence number

Definition at line 333 of file tcp_bt.c.

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◆ tcp_bt_track_tx()

void tcp_bt_track_tx	(	tcp_connection_t *	tc,
		u32	len
	)

Track a tcp tx burst.

Parameters

tc	tcp connection

Definition at line 297 of file tcp_bt.c.

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◆ tcp_buffer_hdr()

static tcp_header_t* tcp_buffer_hdr ( vlib_buffer_t * b )

inlinestatic

Definition at line 696 of file tcp.h.

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◆ tcp_bytes_out()

static u32 tcp_bytes_out ( const tcp_connection_t * tc )

inlinestatic

Our estimate of the number of bytes that have left the network.

Definition at line 887 of file tcp.h.

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◆ tcp_cc_algo_get()

tcp_cc_algorithm_t* tcp_cc_algo_get ( tcp_cc_algorithm_type_e type )

Definition at line 97 of file tcp.c.

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◆ tcp_cc_algo_new_type()

tcp_cc_algorithm_type_e tcp_cc_algo_new_type ( const tcp_cc_algorithm_t * vft )

Register new cc algo type.

Definition at line 104 of file tcp.c.

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◆ tcp_cc_algo_register()

void tcp_cc_algo_register	(	tcp_cc_algorithm_type_e	type,
		const tcp_cc_algorithm_t *	vft
	)

Register exiting cc algo type.

Definition at line 86 of file tcp.c.

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◆ tcp_cc_congestion()

static void tcp_cc_congestion ( tcp_connection_t * tc )

inlinestatic

Definition at line 1067 of file tcp.h.

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◆ tcp_cc_data()

static void* tcp_cc_data ( tcp_connection_t * tc )

inlinestatic

Definition at line 1238 of file tcp.h.

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◆ tcp_cc_event()

static void tcp_cc_event	(	tcp_connection_t *	tc,
		tcp_cc_event_t	evt
	)

inlinestatic

Definition at line 1092 of file tcp.h.

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◆ tcp_cc_get_pacing_rate()

static u64 tcp_cc_get_pacing_rate ( tcp_connection_t * tc )

inlinestatic

Definition at line 1099 of file tcp.h.

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◆ tcp_cc_loss()

static void tcp_cc_loss ( tcp_connection_t * tc )

inlinestatic

Definition at line 1073 of file tcp.h.

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◆ tcp_cc_rcv_ack()

static void tcp_cc_rcv_ack	(	tcp_connection_t *	tc,
		tcp_rate_sample_t *	rs
	)

inlinestatic

Definition at line 1053 of file tcp.h.

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◆ tcp_cc_rcv_cong_ack()

static void tcp_cc_rcv_cong_ack	(	tcp_connection_t *	tc,
		tcp_cc_ack_t	ack_type,
		tcp_rate_sample_t *	rs
	)

inlinestatic

Definition at line 1060 of file tcp.h.

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◆ tcp_cc_recovered()

static void tcp_cc_recovered ( tcp_connection_t * tc )

inlinestatic

Definition at line 1079 of file tcp.h.

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◆ tcp_cc_undo_recovery()

static void tcp_cc_undo_recovery ( tcp_connection_t * tc )

inlinestatic

Definition at line 1085 of file tcp.h.

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◆ tcp_configure_v4_source_address_range()

int tcp_configure_v4_source_address_range	(	vlib_main_t *	vm,
		ip4_address_t *	start,
		ip4_address_t *	end,
		u32	table_id
	)

Configure an ipv4 source address range.

Parameters

vm	vlib_main_t pointer
start	first ipv4 address in the source address range
end	last ipv4 address in the source address range
table_id	VRF / table ID, 0 for the default FIB

Returns: 0 if all OK, else an error indication from api_errno.h

Definition at line 1862 of file tcp.c.

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◆ tcp_configure_v6_source_address_range()

int tcp_configure_v6_source_address_range	(	vlib_main_t *	vm,
		ip6_address_t *	start,
		ip6_address_t *	end,
		u32	table_id
	)

Configure an ipv6 source address range.

Parameters

vm	vlib_main_t pointer
start	first ipv6 address in the source address range
end	last ipv6 address in the source address range
table_id	VRF / table ID, 0 for the default FIB

Returns: 0 if all OK, else an error indication from api_errno.h

Definition at line 1949 of file tcp.c.

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◆ tcp_cong_recovery_off()

static void tcp_cong_recovery_off ( tcp_connection_t * tc )

inlinestatic

Definition at line 480 of file tcp.h.

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◆ tcp_connection_alloc()

tcp_connection_t* tcp_connection_alloc ( u8 thread_index )

Definition at line 298 of file tcp.c.

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◆ tcp_connection_alloc_w_base()

tcp_connection_t* tcp_connection_alloc_w_base	(	u8	thread_index,
		tcp_connection_t *	base
	)

Definition at line 311 of file tcp.c.

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◆ tcp_connection_cleanup()

void tcp_connection_cleanup ( tcp_connection_t * tc )

Cleans up connection state.

No notifications.

Definition at line 238 of file tcp.c.

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◆ tcp_connection_close()

void tcp_connection_close ( tcp_connection_t * tc )

Begin connection closing procedure.

If at the end the connection is not in CLOSED state, it is not removed. Instead, we rely on on TCP to advance through state machine to either 1) LAST_ACK (passive close) whereby when the last ACK is received tcp_connection_del is called. This notifies session of the delete and calls cleanup. 2) TIME_WAIT (active close) whereby after 2MSL the 2MSL timer triggers and cleanup is called.

N.B. Half-close connections are not supported

Definition at line 401 of file tcp.c.

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◆ tcp_connection_del()

void tcp_connection_del ( tcp_connection_t * tc )

Connection removal.

This should be called only once connection enters CLOSED state. Note that it notifies the session of the removal event, so if the goal is to just remove the connection, call tcp_connection_cleanup instead.

Definition at line 291 of file tcp.c.

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◆ tcp_connection_free()

void tcp_connection_free ( tcp_connection_t * tc )

Definition at line 324 of file tcp.c.

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◆ tcp_connection_get()

static tcp_connection_t* tcp_connection_get	(	u32	conn_index,
		u32	thread_index
	)

inlinestatic

Definition at line 717 of file tcp.h.

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◆ tcp_connection_get_if_valid()

static tcp_connection_t* tcp_connection_get_if_valid	(	u32	conn_index,
		u32	thread_index
	)

inlinestatic

Definition at line 726 of file tcp.h.

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◆ tcp_connection_init_vars()

void tcp_connection_init_vars ( tcp_connection_t * tc )

Initialize tcp connection variables.

Should be called after having received a msg from the peer, i.e., a SYN or a SYNACK, such that connection options have already been exchanged.

Definition at line 726 of file tcp.c.

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◆ tcp_connection_reset()

void tcp_connection_reset ( tcp_connection_t * tc )

Notify session that connection has been reset.

Switch state to closed and wait for session to call cleanup.

Definition at line 342 of file tcp.c.

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◆ tcp_connection_set_state()

static void tcp_connection_set_state	(	tcp_connection_t *	tc,
		tcp_state_t	state
	)

inlinestatic

Definition at line 742 of file tcp.h.

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◆ tcp_connection_timers_init()

void tcp_connection_timers_init ( tcp_connection_t * tc )

Initialize all connection timers as invalid.

Definition at line 502 of file tcp.c.

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◆ tcp_connection_timers_reset()

void tcp_connection_timers_reset ( tcp_connection_t * tc )

Stop all connection timers.

Definition at line 519 of file tcp.c.

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◆ tcp_connection_tx_pacer_reset()

void tcp_connection_tx_pacer_reset	(	tcp_connection_t *	tc,
		u32	window,
		u32	start_bucket
	)

Definition at line 1409 of file tcp.c.

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◆ tcp_connection_tx_pacer_update()

void tcp_connection_tx_pacer_update ( tcp_connection_t * tc )

Definition at line 1396 of file tcp.c.

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◆ tcp_cwnd_accumulate()

static void tcp_cwnd_accumulate	(	tcp_connection_t *	tc,
		u32	thresh,
		u32	bytes
	)

inlinestatic

Definition at line 936 of file tcp.h.

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◆ tcp_end_seq()

static u32 tcp_end_seq	(	tcp_header_t *	th,
		u32	len
	)

inlinestatic

Definition at line 867 of file tcp.h.

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◆ tcp_fastrecovery_prr_snd_space()

int tcp_fastrecovery_prr_snd_space ( tcp_connection_t * tc )

Estimate send space using proportional rate reduction (RFC6937)

Definition at line 1798 of file tcp_output.c.

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◆ tcp_flight_size()

static u32 tcp_flight_size ( const tcp_connection_t * tc )

inlinestatic

Our estimate of the number of bytes in flight (pipe size)

Definition at line 900 of file tcp.h.

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◆ tcp_flush_frames_to_output()

void tcp_flush_frames_to_output ( tcp_worker_ctx_t * wrk )

Flush v4 and v6 tcp and ip-lookup tx frames for thread index.

Definition at line 997 of file tcp_output.c.

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◆ tcp_get_connection_from_transport()

static tcp_connection_t* tcp_get_connection_from_transport ( transport_connection_t * tconn )

inlinestatic

Definition at line 736 of file tcp.h.

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◆ tcp_get_worker()

static tcp_worker_ctx_t* tcp_get_worker ( u32 thread_index )

inlinestatic

Definition at line 690 of file tcp.h.

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◆ tcp_half_open_connection_cleanup()

int tcp_half_open_connection_cleanup ( tcp_connection_t * tc )

Try to cleanup half-open connection.

If called from a thread that doesn't own tc, the call won't have any effect.

Parameters

tc	- connection to be cleaned up

Returns: non-zero if cleanup failed.

Definition at line 210 of file tcp.c.

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◆ tcp_half_open_connection_get()

static tcp_connection_t* tcp_half_open_connection_get ( u32 conn_index )

inlinestatic

Definition at line 777 of file tcp.h.

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◆ tcp_init_snd_vars()

void tcp_init_snd_vars ( tcp_connection_t * tc )

Initialize connection send variables.

Definition at line 691 of file tcp.c.

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◆ tcp_initial_cwnd()

static u32 tcp_initial_cwnd ( const tcp_connection_t * tc )

inlinestatic

Initial cwnd as per RFC5681.

Definition at line 916 of file tcp.h.

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◆ tcp_is_lost_fin()

static u8 tcp_is_lost_fin ( tcp_connection_t * tc )

inlinestatic

Definition at line 989 of file tcp.h.

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◆ tcp_listener_get()

static tcp_connection_t* tcp_listener_get ( u32 tli )

inlinestatic

Definition at line 768 of file tcp.h.

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◆ tcp_lookup_rmt_in_fib()

fib_node_index_t tcp_lookup_rmt_in_fib ( tcp_connection_t * tc )

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◆ tcp_loss_wnd()

static u32 tcp_loss_wnd ( const tcp_connection_t * tc )

inlinestatic

Definition at line 949 of file tcp.h.

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◆ tcp_make_fin()

void tcp_make_fin	(	tcp_connection_t *	tc,
		vlib_buffer_t *	b
	)

Convert buffer to FIN-ACK.

Definition at line 569 of file tcp_output.c.

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◆ tcp_make_synack()

void tcp_make_synack	(	tcp_connection_t *	ts,
		vlib_buffer_t *	b
	)

Convert buffer to SYN-ACK.

Definition at line 604 of file tcp_output.c.

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◆ tcp_persist_timer_reset()

static void tcp_persist_timer_reset ( tcp_connection_t * tc )

inlinestatic

Definition at line 1193 of file tcp.h.

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◆ tcp_persist_timer_set()

static void tcp_persist_timer_set ( tcp_connection_t * tc )

inlinestatic

Definition at line 1172 of file tcp.h.

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◆ tcp_persist_timer_update()

static void tcp_persist_timer_update ( tcp_connection_t * tc )

inlinestatic

Definition at line 1180 of file tcp.h.

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◆ tcp_program_ack()

void tcp_program_ack ( tcp_connection_t * tc )

Definition at line 1176 of file tcp_output.c.

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◆ tcp_program_dupack()

void tcp_program_dupack ( tcp_connection_t * tc )

Definition at line 1186 of file tcp_output.c.

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◆ tcp_program_retransmit()

void tcp_program_retransmit ( tcp_connection_t * tc )

Definition at line 1198 of file tcp_output.c.

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◆ tcp_punt_unknown()

void tcp_punt_unknown	(	vlib_main_t *	vm,
		u8	is_ip4,
		u8	is_add
	)

Definition at line 1654 of file tcp.c.

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◆ tcp_rcv_sacks()

void tcp_rcv_sacks	(	tcp_connection_t *	tc,
		u32	ack
	)

Definition at line 981 of file tcp_input.c.

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◆ tcp_retransmit_timer_force_update()

static void tcp_retransmit_timer_force_update ( tcp_connection_t * tc )

inlinestatic

Definition at line 1165 of file tcp.h.

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◆ tcp_retransmit_timer_reset()

static void tcp_retransmit_timer_reset ( tcp_connection_t * tc )

inlinestatic

Definition at line 1159 of file tcp.h.

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◆ tcp_retransmit_timer_set()

static void tcp_retransmit_timer_set ( tcp_connection_t * tc )

inlinestatic

Definition at line 1151 of file tcp.h.

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◆ tcp_retransmit_timer_update()

static void tcp_retransmit_timer_update ( tcp_connection_t * tc )

inlinestatic

Definition at line 1199 of file tcp.h.

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◆ tcp_sack_list_bytes()

u32 tcp_sack_list_bytes ( tcp_connection_t * tc )

Definition at line 1792 of file tcp_input.c.

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◆ tcp_scoreboard_replay()

u8* tcp_scoreboard_replay	(	u8 *	s,
		tcp_connection_t *	tc,
		u8	verbose
	)

Definition at line 2172 of file tcp.c.

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◆ tcp_send_ack()

void tcp_send_ack ( tcp_connection_t * tc )

Definition at line 1157 of file tcp_output.c.

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◆ tcp_send_fin()

void tcp_send_fin ( tcp_connection_t * tc )

Send FIN.

Definition at line 1007 of file tcp_output.c.

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◆ tcp_send_reset()

void tcp_send_reset ( tcp_connection_t * tc )

Build and set reset packet for connection.

Definition at line 863 of file tcp_output.c.

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◆ tcp_send_reset_w_pkt()

void tcp_send_reset_w_pkt	(	tcp_connection_t *	tc,
		vlib_buffer_t *	pkt,
		u32	thread_index,
		u8	is_ip4
	)

Send reset without reusing existing buffer.

It extracts connection info out of original packet

Definition at line 778 of file tcp_output.c.

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◆ tcp_send_syn()

void tcp_send_syn ( tcp_connection_t * tc )

Send SYN.

Builds a SYN packet for a half-open connection and sends it to ipx_lookup. The packet is not forwarded through tcpx_output to avoid doing lookups in the half_open pool.

Definition at line 919 of file tcp_output.c.

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◆ tcp_send_synack()

void tcp_send_synack ( tcp_connection_t * tc )

Definition at line 954 of file tcp_output.c.

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◆ tcp_send_window_update_ack()

void tcp_send_window_update_ack ( tcp_connection_t * tc )

Send window update ack.

Ensures that it will be sent only once, after a zero rwnd has been advertised in a previous ack, and only if rwnd has grown beyond a configurable value.

Definition at line 1229 of file tcp_output.c.

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◆ tcp_session_custom_tx()

int tcp_session_custom_tx	(	void *	conn,
		u32	max_burst_size
	)

Definition at line 2157 of file tcp_output.c.

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◆ tcp_session_push_header()

u32 tcp_session_push_header	(	transport_connection_t *	tconn,
		vlib_buffer_t *	b
	)

Definition at line 1129 of file tcp_output.c.

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◆ tcp_set_time_now()

static u32 tcp_set_time_now ( tcp_worker_ctx_t * wrk )

inlinestatic

Definition at line 1034 of file tcp.h.

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◆ tcp_snd_space()

u32 tcp_snd_space ( tcp_connection_t * tc )

Definition at line 1322 of file tcp.c.

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◆ tcp_time_now()

static u32 tcp_time_now ( void )

inlinestatic

Definition at line 1006 of file tcp.h.

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◆ tcp_time_now_us()

static f64 tcp_time_now_us ( u32 thread_index )

inlinestatic

Definition at line 1028 of file tcp.h.

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◆ tcp_time_now_w_thread()

static u32 tcp_time_now_w_thread ( u32 thread_index )

inlinestatic

Definition at line 1012 of file tcp.h.

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◆ tcp_timer_is_active()

static u8 tcp_timer_is_active	(	tcp_connection_t *	tc,
		tcp_timers_e	timer
	)

inlinestatic

Definition at line 1213 of file tcp.h.

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◆ tcp_timer_reset()

static void tcp_timer_reset	(	tcp_connection_t *	tc,
		u8	timer_id
	)

inlinestatic

Definition at line 1123 of file tcp.h.

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◆ tcp_timer_set()

static void tcp_timer_set	(	tcp_connection_t *	tc,
		u8	timer_id,
		u32	interval
	)

inlinestatic

Definition at line 1112 of file tcp.h.

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◆ tcp_timer_update()

static void tcp_timer_update	(	tcp_connection_t *	tc,
		u8	timer_id,
		u32	interval
	)

inlinestatic

Definition at line 1136 of file tcp.h.

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◆ tcp_tstamp()

static u32 tcp_tstamp ( tcp_connection_t * tc )

inlinestatic

Generate timestamp for tcp connection.

Definition at line 1021 of file tcp.h.

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◆ tcp_update_burst_snd_vars()

void tcp_update_burst_snd_vars ( tcp_connection_t * tc )

Update burst send vars.

Updates snd_mss to reflect the effective segment size that we can send by taking into account all TCP options, including SACKs.
Cache 'on the wire' options for reuse
Updates receive window which can be reused for a burst.

This should only be called when doing bursts

Definition at line 390 of file tcp_output.c.

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◆ tcp_update_rto()

void tcp_update_rto ( tcp_connection_t * tc )

Definition at line 478 of file tcp_input.c.

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◆ tcp_update_sack_list()

void tcp_update_sack_list	(	tcp_connection_t *	tc,
		u32	start,
		u32	end
	)

Build SACK list as per RFC2018.

Makes sure the first block contains the segment that generated the current ACK and the following ones are the ones most recently reported in SACK blocks.

Parameters

tc	TCP connection for which the SACK list is updated
start	Start sequence number of the newest SACK block
end	End sequence of the newest SACK block

Definition at line 1743 of file tcp_input.c.

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◆ vlib_buffer_push_tcp()

static 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
	)

inlinestatic

Push TCP header to buffer.

Parameters

b	- buffer to write the header to
sp_net	- source port net order
dp_net	- destination port net order
seq	- sequence number host order
ack	- ack number host order
tcp_hdr_opts_len	- header and options length in bytes
flags	- header flags
wnd	- window size

Returns: - pointer to start of TCP header

Definition at line 1299 of file tcp.h.

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◆ vlib_buffer_push_tcp_net_order()

static 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
	)

inlinestatic

Push TCP header to buffer.

Parameters

vm	- vlib_main
b	- buffer to write the header to
sp_net	- source port net order
dp_net	- destination port net order
seq	- sequence number net order
ack	- ack number net order
tcp_hdr_opts_len	- header and options length in bytes
flags	- header flags
wnd	- window size

Returns: - pointer to start of TCP header

Definition at line 1262 of file tcp.h.

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◆ vnet_get_tcp_main()

static tcp_main_t* vnet_get_tcp_main ( )

inlinestatic

Definition at line 684 of file tcp.h.

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◆ vnet_tcp_enable_disable()

clib_error_t* vnet_tcp_enable_disable	(	vlib_main_t *	vm,
		u8	is_en
	)

Definition at line 1636 of file tcp.c.

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Variable Documentation

◆ format_tcp_flags

format_function_t format_tcp_flags

Definition at line 65 of file tcp.h.

◆ format_tcp_rcv_sacks

format_function_t format_tcp_rcv_sacks

Definition at line 67 of file tcp.h.

◆ format_tcp_sacks

format_function_t format_tcp_sacks

Definition at line 66 of file tcp.h.

◆ format_tcp_state

format_function_t format_tcp_state

Definition at line 64 of file tcp.h.

◆ tcp4_established_node

vlib_node_registration_t tcp4_established_node

(constructor) VLIB_REGISTER_NODE (tcp4_established_node)

Definition at line 2244 of file tcp_input.c.

◆ tcp4_input_node

vlib_node_registration_t tcp4_input_node

(constructor) VLIB_REGISTER_NODE (tcp4_input_node)

Definition at line 3786 of file tcp_input.c.

◆ tcp4_listen_node

vlib_node_registration_t tcp4_listen_node

(constructor) VLIB_REGISTER_NODE (tcp4_listen_node)

Definition at line 3373 of file tcp_input.c.

◆ tcp4_output_node

vlib_node_registration_t tcp4_output_node

(constructor) VLIB_REGISTER_NODE (tcp4_output_node)

Definition at line 2456 of file tcp_output.c.

◆ tcp4_rcv_process_node

vlib_node_registration_t tcp4_rcv_process_node

(constructor) VLIB_REGISTER_NODE (tcp4_rcv_process_node)

Definition at line 3156 of file tcp_input.c.

◆ tcp4_syn_sent_node

vlib_node_registration_t tcp4_syn_sent_node

(constructor) VLIB_REGISTER_NODE (tcp4_syn_sent_node)

Definition at line 2723 of file tcp_input.c.

◆ tcp6_established_node

vlib_node_registration_t tcp6_established_node

(constructor) VLIB_REGISTER_NODE (tcp6_established_node)

Definition at line 2263 of file tcp_input.c.

◆ tcp6_input_node

vlib_node_registration_t tcp6_input_node

(constructor) VLIB_REGISTER_NODE (tcp6_input_node)

Definition at line 3806 of file tcp_input.c.

◆ tcp6_listen_node

vlib_node_registration_t tcp6_listen_node

(constructor) VLIB_REGISTER_NODE (tcp6_listen_node)

Definition at line 3392 of file tcp_input.c.

◆ tcp6_output_node

vlib_node_registration_t tcp6_output_node

(constructor) VLIB_REGISTER_NODE (tcp6_output_node)

Definition at line 2476 of file tcp_output.c.

◆ tcp6_rcv_process_node

vlib_node_registration_t tcp6_rcv_process_node

(constructor) VLIB_REGISTER_NODE (tcp6_rcv_process_node)

Definition at line 3175 of file tcp_input.c.

◆ tcp6_syn_sent_node

vlib_node_registration_t tcp6_syn_sent_node

(constructor) VLIB_REGISTER_NODE (tcp6_syn_sent_node)

Definition at line 2742 of file tcp_input.c.

◆ tcp_main

tcp_main_t tcp_main

Definition at line 29 of file tcp.c.

◆ tcp_timer_delack_handler

timer_expiration_handler tcp_timer_delack_handler

◆ tcp_timer_persist_handler

timer_expiration_handler tcp_timer_persist_handler

◆ tcp_timer_retransmit_handler

timer_expiration_handler tcp_timer_retransmit_handler

◆ tcp_timer_retransmit_syn_handler

timer_expiration_handler tcp_timer_retransmit_syn_handler

Data Structures

Macros

Typedefs

Enumerations

Functions

Variables

Macro Definition Documentation

◆ foreach_tcp_cfg_flag

◆ foreach_tcp_connection_flag

◆ foreach_tcp_fsm_state

◆ foreach_tcp_timer

◆ seq_geq

◆ seq_gt

◆ seq_leq

◆ seq_lt

◆ seq_max

◆ TCP_ALWAYS_ACK

◆ TCP_BTS_INVALID_INDEX

◆ TCP_CC_DATA_SZ

◆ tcp_cfg

◆ tcp_csum_offload

◆ tcp_disconnect_pending

◆ tcp_disconnect_pending_off

◆ tcp_disconnect_pending_on

◆ TCP_DUPACK_THRESHOLD

◆ tcp_error

◆ TCP_ESTABLISH_TIME

◆ tcp_fastrecovery_first

◆ tcp_fastrecovery_first_off

◆ tcp_fastrecovery_first_on

◆ tcp_fastrecovery_off

◆ tcp_fastrecovery_on

◆ TCP_FIB_RECHECK_PERIOD

◆ tcp_in_cong_recovery

◆ tcp_in_fastrecovery

◆ tcp_in_recovery

◆ tcp_in_slowstart

◆ TCP_INVALID_SACK_HOLE_INDEX

◆ TCP_IW_N_SEGMENTS

◆ TCP_MAX_GSO_SZ

◆ TCP_MAX_OPTION_SPACE

◆ TCP_MAX_SACK_BLOCKS

◆ tcp_node_index

◆ TCP_PAWS_IDLE

◆ tcp_recovery_off

◆ tcp_recovery_on

◆ TCP_RTO_BOFF_MAX

◆ TCP_RTO_INIT

◆ TCP_RTO_MAX

◆ TCP_RTO_MIN

◆ TCP_RTO_SYN_RETRIES

◆ TCP_RTT_MAX

◆ TCP_RXT_MAX_BURST

◆ TCP_SCOREBOARD_TRACE

◆ tcp_scoreboard_trace_add

◆ TCP_TICK

◆ TCP_TIMER_HANDLE_INVALID

◆ TCP_TIMER_TICK

◆ TCP_TO_TIMER_TICK

◆ tcp_trajectory_add_start

◆ TCP_TSTAMP_RESOLUTION

◆ TCP_USE_SACKS

◆ tcp_validate_txf_size

◆ tcp_zero_rwnd_sent

◆ tcp_zero_rwnd_sent_off

◆ tcp_zero_rwnd_sent_on

◆ THZ

◆ timestamp_leq

◆ timestamp_lt

Typedef Documentation

◆ sack_scoreboard_hole_t

◆ sack_scoreboard_t

◆ scoreboard_trace_elt_t

◆ tcp_bt_sample_t

◆ tcp_bts_flags_t

◆ tcp_byte_tracker_t

◆ tcp_cc_ack_t

◆ tcp_cc_algorithm_t

◆ tcp_cc_algorithm_type_e

◆ tcp_cc_event_t