tcp.c File Reference

TCP host stack utilities. More...

Include dependency graph for tcp.c:

Go to the source code of this file.

Data Structures
struct	tcp_add_del_adj_args_t

Functions
static void	tcp_add_del_adj_cb (tcp_add_del_adj_args_t *args)
static void	tcp_add_del_adjacency (tcp_connection_t *tc, u8 is_add)
static void	tcp_cc_init (tcp_connection_t *tc)
static void	tcp_cc_cleanup (tcp_connection_t *tc)
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_t *	tcp_cc_algo_get (tcp_cc_algorithm_type_e type)
tcp_cc_algorithm_type_e	tcp_cc_algo_new_type (const tcp_cc_algorithm_t *vft)
	Register new cc algo type. More...
static u32	tcp_connection_bind (u32 session_index, transport_endpoint_t *lcl)
static u32	tcp_session_bind (u32 session_index, transport_endpoint_t *tep)
static void	tcp_connection_unbind (u32 listener_index)
static u32	tcp_session_unbind (u32 listener_index)
static transport_connection_t *	tcp_session_get_listener (u32 listener_index)
static void	tcp_half_open_connection_del (tcp_connection_t *tc)
	Cleanup half-open connection. More...
int	tcp_half_open_connection_cleanup (tcp_connection_t *tc)
	Try to cleanup half-open connection. More...
static tcp_connection_t *	tcp_half_open_connection_new (void)
void	tcp_connection_cleanup (tcp_connection_t *tc)
	Cleans up connection state. More...
void	tcp_connection_del (tcp_connection_t *tc)
	Connection removal. More...
tcp_connection_t *	tcp_connection_alloc (u8 thread_index)
void	tcp_connection_free (tcp_connection_t *tc)
void	tcp_connection_reset (tcp_connection_t *tc)
	Notify session that connection has been reset. More...
void	tcp_connection_close (tcp_connection_t *tc)
	Begin connection closing procedure. More...
static void	tcp_session_close (u32 conn_index, u32 thread_index)
static void	tcp_session_cleanup (u32 conn_index, u32 thread_index)
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...
static u32	tcp_generate_random_iss (tcp_connection_t *tc)
	Generate random iss as per rfc6528. More...
void	tcp_init_snd_vars (tcp_connection_t *tc)
	Initialize connection send variables. More...
void	tcp_enable_pacing (tcp_connection_t *tc)
void	tcp_connection_init_vars (tcp_connection_t *tc)
	Initialize tcp connection variables. More...
static int	tcp_alloc_custom_local_endpoint (tcp_main_t *tm, ip46_address_t *lcl_addr, u16 *lcl_port, u8 is_ip4)
static int	tcp_session_open (transport_endpoint_cfg_t *rmt)
u8 *	format_tcp_state (u8 *s, va_list *args)
static u8 *	format_tcp_connection_flags (u8 *s, va_list *args)
static u8 *	format_tcp_timers (u8 *s, va_list *args)
static u8 *	format_tcp_congestion_status (u8 *s, va_list *args)
static i32	tcp_rcv_wnd_available (tcp_connection_t *tc)
static u8 *	format_tcp_congestion (u8 *s, va_list *args)
static u8 *	format_tcp_stats (u8 *s, va_list *args)
static u8 *	format_tcp_vars (u8 *s, va_list *args)
static u8 *	format_tcp_connection_id (u8 *s, va_list *args)
u8 *	format_tcp_connection (u8 *s, va_list *args)
static u8 *	format_tcp_session (u8 *s, va_list *args)
static u8 *	format_tcp_listener_session (u8 *s, va_list *args)
static u8 *	format_tcp_half_open_session (u8 *s, va_list *args)
u8 *	format_tcp_sacks (u8 *s, va_list *args)
u8 *	format_tcp_rcv_sacks (u8 *s, va_list *args)
static u8 *	format_tcp_sack_hole (u8 *s, va_list *args)
u8 *	format_tcp_scoreboard (u8 *s, va_list *args)
static transport_connection_t *	tcp_session_get_transport (u32 conn_index, u32 thread_index)
static transport_connection_t *	tcp_half_open_session_get_transport (u32 conn_index)
static u16	tcp_session_send_mss (transport_connection_t *trans_conn)
	Compute maximum segment size for session layer. More...
static u32	tcp_round_snd_space (tcp_connection_t *tc, u32 snd_space)
static u32	tcp_snd_space_inline (tcp_connection_t *tc)
	Compute tx window session is allowed to fill. More...
u32	tcp_snd_space (tcp_connection_t *tc)
static u32	tcp_session_send_space (transport_connection_t *trans_conn)
static u32	tcp_session_tx_fifo_offset (transport_connection_t *trans_conn)
static void	tcp_update_time (f64 now, u8 thread_index)
static void	tcp_session_flush_data (transport_connection_t *tconn)
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_timer_waitclose_handler (u32 conn_index)
static void	tcp_expired_timers_dispatch (u32 *expired_timers)
static void	tcp_initialize_timer_wheels (tcp_main_t *tm)
static void	tcp_initialize_iss_seed (tcp_main_t *tm)
static clib_error_t *	tcp_main_enable (vlib_main_t *vm)
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 void	tcp_configuration_init (void)
	Initialize default values for tcp parameters. More...
static clib_error_t *	tcp_init (vlib_main_t *vm)
uword	unformat_tcp_cc_algo (unformat_input_t *input, va_list *va)
uword	unformat_tcp_cc_algo_cfg (unformat_input_t *input, va_list *va)
static clib_error_t *	tcp_config_fn (vlib_main_t *vm, unformat_input_t *input)
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...
static clib_error_t *	tcp_src_address (vlib_main_t *vm, unformat_input_t *input, vlib_cli_command_t *cmd_arg)
static u8 *	tcp_scoreboard_dump_trace (u8 *s, sack_scoreboard_t *sb)
static clib_error_t *	tcp_show_scoreboard_trace_fn (vlib_main_t *vm, unformat_input_t *input, vlib_cli_command_t *cmd_arg)
u8 *	tcp_scoreboard_replay (u8 *s, tcp_connection_t *tc, u8 verbose)
static clib_error_t *	tcp_scoreboard_trace_fn (vlib_main_t *vm, unformat_input_t *input, vlib_cli_command_t *cmd_arg)
static clib_error_t *	show_tcp_punt_fn (vlib_main_t *vm, unformat_input_t *input, vlib_cli_command_t *cmd_arg)

Variables
tcp_main_t	tcp_main
const char *	tcp_dbg_evt_str []
const char *	tcp_fsm_states []
const char *	tcp_connection_flags_str []
const char *	tcp_conn_timers []
static const transport_proto_vft_t	tcp_proto
static timer_expiration_handler *	timer_expiration_handlers [TCP_N_TIMERS]
static vlib_cli_command_t	tcp_src_address_command
	(constructor) VLIB_CLI_COMMAND (tcp_src_address_command) More...
static vlib_cli_command_t	tcp_show_scoreboard_trace_command
	(constructor) VLIB_CLI_COMMAND (tcp_show_scoreboard_trace_command) More...
static vlib_cli_command_t	tcp_replay_scoreboard_command
	(constructor) VLIB_CLI_COMMAND (tcp_replay_scoreboard_command) More...
static vlib_cli_command_t	show_tcp_punt_command
	(constructor) VLIB_CLI_COMMAND (show_tcp_punt_command) More...

Detailed Description

TCP host stack utilities.

Definition in file tcp.c.

Function Documentation

static u8* format_tcp_congestion ( u8 *  s, va_list *  args  )

static

Definition at line 850 of file tcp.c.

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static u8* format_tcp_congestion_status ( u8 *  s, va_list *  args  )

static

Definition at line 831 of file tcp.c.

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

Definition at line 954 of file tcp.c.

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static u8* format_tcp_connection_flags ( u8 *  s, va_list *  args  )

static

Definition at line 784 of file tcp.c.

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

static

Definition at line 930 of file tcp.c.

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static u8* format_tcp_half_open_session ( u8 *  s, va_list *  args  )

static

Definition at line 1002 of file tcp.c.

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static u8* format_tcp_listener_session ( u8 *  s, va_list *  args  )

static

Definition at line 989 of file tcp.c.

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

Definition at line 1035 of file tcp.c.

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static u8* format_tcp_sack_hole ( u8 *  s, va_list *  args  )

static

Definition at line 1059 of file tcp.c.

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

Definition at line 1011 of file tcp.c.

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

Definition at line 1071 of file tcp.c.

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static u8* format_tcp_session ( u8 *  s, va_list *  args  )

static

Definition at line 973 of file tcp.c.

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

Definition at line 766 of file tcp.c.

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static u8* format_tcp_stats ( u8 *  s, va_list *  args  )

static

Definition at line 868 of file tcp.c.

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static u8* format_tcp_timers ( u8 *  s, va_list *  args  )

static

Definition at line 809 of file tcp.c.

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static u8* format_tcp_vars ( u8 *  s, va_list *  args  )

static

Definition at line 889 of file tcp.c.

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static clib_error_t* show_tcp_punt_fn ( vlib_main_t *  vm, unformat_input_t *  input, vlib_cli_command_t *  cmd_arg  )

static

Definition at line 2122 of file tcp.c.

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static void tcp_add_del_adj_cb ( tcp_add_del_adj_args_t *  args )

static

Definition at line 42 of file tcp.c.

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static void tcp_add_del_adjacency ( tcp_connection_t *  tc, u8  is_add  )

static

Definition at line 60 of file tcp.c.

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static int tcp_alloc_custom_local_endpoint ( tcp_main_t *  tm, ip46_address_t *  lcl_addr, u16 *  lcl_port, u8  is_ip4  )

static

Definition at line 677 of file tcp.c.

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tcp_cc_algorithm_t* tcp_cc_algo_get

(

tcp_cc_algorithm_type_e

type

)

Definition at line 99 of file tcp.c.

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tcp_cc_algorithm_type_e tcp_cc_algo_new_type

(

const tcp_cc_algorithm_t *

vft

)

Register new cc algo type.

Definition at line 106 of file tcp.c.

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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 88 of file tcp.c.

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static void tcp_cc_cleanup ( tcp_connection_t *  tc )

static

Definition at line 81 of file tcp.c.

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static void tcp_cc_init ( tcp_connection_t *  tc )

static

Definition at line 74 of file tcp.c.

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static clib_error_t* tcp_config_fn ( vlib_main_t *  vm, unformat_input_t *  input  )

static

Definition at line 1622 of file tcp.c.

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static void tcp_configuration_init ( void  )

static

Initialize default values for tcp parameters.

Definition at line 1521 of file tcp.c.

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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 1687 of file tcp.c.

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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 1775 of file tcp.c.

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tcp_connection_t* tcp_connection_alloc

(

u8

thread_index

)

Definition at line 297 of file tcp.c.

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static u32 tcp_connection_bind ( u32  session_index, transport_endpoint_t *  lcl  )

static

Definition at line 114 of file tcp.c.

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void tcp_connection_cleanup

(

tcp_connection_t *

tc

)

Cleans up connection state.

No notifications.

Definition at line 239 of file tcp.c.

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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 385 of file tcp.c.

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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 290 of file tcp.c.

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void tcp_connection_free

(

tcp_connection_t *

tc

)

Definition at line 310 of file tcp.c.

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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 652 of file tcp.c.

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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 328 of file tcp.c.

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void tcp_connection_timers_init

(

tcp_connection_t *

tc

)

Initialize all connection timers as invalid.

Definition at line 471 of file tcp.c.

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void tcp_connection_timers_reset

(

tcp_connection_t *

tc

)

Stop all connection timers.

Definition at line 488 of file tcp.c.

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

Definition at line 1280 of file tcp.c.

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void tcp_connection_tx_pacer_update

(

tcp_connection_t *

tc

)

Definition at line 1264 of file tcp.c.

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static void tcp_connection_unbind ( u32  listener_index )

static

Definition at line 154 of file tcp.c.

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void tcp_enable_pacing

(

tcp_connection_t *

tc

)

Definition at line 637 of file tcp.c.

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static void tcp_expired_timers_dispatch ( u32 *  expired_timers )

static

Definition at line 1372 of file tcp.c.

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static u32 tcp_generate_random_iss ( tcp_connection_t *  tc )

static

Generate random iss as per rfc6528.

Definition at line 598 of file tcp.c.

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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 211 of file tcp.c.

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static void tcp_half_open_connection_del ( tcp_connection_t *  tc )

static

Cleanup half-open connection.

Definition at line 191 of file tcp.c.

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static tcp_connection_t* tcp_half_open_connection_new ( void  )

static

Definition at line 222 of file tcp.c.

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static transport_connection_t* tcp_half_open_session_get_transport ( u32  conn_index )

static

Definition at line 1110 of file tcp.c.

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static clib_error_t* tcp_init ( vlib_main_t *  vm )

static

Definition at line 1546 of file tcp.c.

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void tcp_init_snd_vars

(

tcp_connection_t *

tc

)

Initialize connection send variables.

Definition at line 619 of file tcp.c.

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static void tcp_initialize_iss_seed ( tcp_main_t *  tm )

static

Definition at line 1405 of file tcp.c.

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static void tcp_initialize_timer_wheels ( tcp_main_t *  tm )

static

Definition at line 1391 of file tcp.c.

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static clib_error_t* tcp_main_enable ( vlib_main_t *  vm )

static

Definition at line 1415 of file tcp.c.

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

Definition at line 1508 of file tcp.c.

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static i32 tcp_rcv_wnd_available ( tcp_connection_t *  tc )

static

Definition at line 844 of file tcp.c.

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static u32 tcp_round_snd_space ( tcp_connection_t *  tc, u32  snd_space  )

inlinestatic

Definition at line 1137 of file tcp.c.

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static u8* tcp_scoreboard_dump_trace ( u8 *  s, sack_scoreboard_t *  sb  )

static

Definition at line 1935 of file tcp.c.

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

Definition at line 1998 of file tcp.c.

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static clib_error_t* tcp_scoreboard_trace_fn ( vlib_main_t *  vm, unformat_input_t *  input, vlib_cli_command_t *  cmd_arg  )

static

Definition at line 2079 of file tcp.c.

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static u32 tcp_session_bind ( u32  session_index, transport_endpoint_t *  tep  )

static

Definition at line 148 of file tcp.c.

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static void tcp_session_cleanup ( u32  conn_index, u32  thread_index  )

static

Definition at line 459 of file tcp.c.

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static void tcp_session_close ( u32  conn_index, u32  thread_index  )

static

Definition at line 451 of file tcp.c.

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static void tcp_session_flush_data ( transport_connection_t *  tconn )

static

Definition at line 1226 of file tcp.c.

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static transport_connection_t* tcp_session_get_listener ( u32  listener_index )

static

Definition at line 178 of file tcp.c.

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static transport_connection_t* tcp_session_get_transport ( u32  conn_index, u32  thread_index  )

static

Definition at line 1103 of file tcp.c.

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static int tcp_session_open ( transport_endpoint_cfg_t *  rmt )

static

Definition at line 707 of file tcp.c.

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static u16 tcp_session_send_mss ( transport_connection_t *  trans_conn )

static

Compute maximum segment size for session layer.

Since the result needs to be the actual data length, it first computes the tcp options to be used in the next burst and subtracts their length from the connection's snd_mss.

Definition at line 1124 of file tcp.c.

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static u32 tcp_session_send_space ( transport_connection_t *  trans_conn )

static

Definition at line 1197 of file tcp.c.

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static u32 tcp_session_tx_fifo_offset ( transport_connection_t *  trans_conn )

static

Definition at line 1205 of file tcp.c.

static u32 tcp_session_unbind ( u32  listener_index )

static

Definition at line 171 of file tcp.c.

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static clib_error_t* tcp_show_scoreboard_trace_fn ( vlib_main_t *  vm, unformat_input_t *  input, vlib_cli_command_t *  cmd_arg  )

static

Definition at line 1960 of file tcp.c.

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u32 tcp_snd_space

(

tcp_connection_t *

tc

)

Definition at line 1191 of file tcp.c.

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static u32 tcp_snd_space_inline ( tcp_connection_t *  tc )

inlinestatic

Compute tx window session is allowed to fill.

Takes into account available send space, snd_mss and the congestion state of the connection. If possible, the value returned is a multiple of snd_mss.

Parameters

tc	tcp connection

Returns

number of bytes session is allowed to write

Definition at line 1164 of file tcp.c.

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static clib_error_t* tcp_src_address ( vlib_main_t *  vm, unformat_input_t *  input, vlib_cli_command_t *  cmd_arg  )

static

Definition at line 1847 of file tcp.c.

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static void tcp_timer_waitclose_handler ( u32  conn_index )

static

Definition at line 1291 of file tcp.c.

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static void tcp_update_time ( f64  now, u8  thread_index  )

static

Definition at line 1216 of file tcp.c.

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uword unformat_tcp_cc_algo	(	unformat_input_t *	input,
		va_list *	va
	)

Definition at line 1579 of file tcp.c.

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uword unformat_tcp_cc_algo_cfg	(	unformat_input_t *	input,
		va_list *	va
	)

Definition at line 1599 of file tcp.c.

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clib_error_t* vnet_tcp_enable_disable	(	vlib_main_t *	vm,
		u8	is_en
	)

Definition at line 1490 of file tcp.c.

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Variable Documentation

vlib_cli_command_t show_tcp_punt_command

static

Initial value:

=
{
  .path = "show tcp punt",
  .short_help = "show tcp punt",
  .function = show_tcp_punt_fn,
}

(constructor) VLIB_CLI_COMMAND (show_tcp_punt_command)

Definition at line 2136 of file tcp.c.

const char* tcp_conn_timers[]

Initial value:

= {
#define _(sym, str) 
  foreach_tcp_timer

}

Definition at line 802 of file tcp.c.

const char* tcp_connection_flags_str[]

Initial value:

= {
#define _(sym, str) 
  foreach_tcp_connection_flag

}

Definition at line 777 of file tcp.c.

const char* tcp_dbg_evt_str[]

Initial value:

= {
#define _(sym, str) 
  foreach_tcp_dbg_evt

}

Definition at line 753 of file tcp.c.

const char* tcp_fsm_states[]

Initial value:

= {
#define _(sym, str) 
  foreach_tcp_fsm_state

}

Definition at line 759 of file tcp.c.

tcp_main_t tcp_main

Definition at line 30 of file tcp.c.

const transport_proto_vft_t tcp_proto

static

Initial value:

= {
  .enable = vnet_tcp_enable_disable,
  .start_listen = tcp_session_bind,
  .stop_listen = tcp_session_unbind,
  .push_header = tcp_session_push_header,
  .get_connection = tcp_session_get_transport,
  .get_listener = tcp_session_get_listener,
  .get_half_open = tcp_half_open_session_get_transport,
  .connect = tcp_session_open,
  .close = tcp_session_close,
  .cleanup = tcp_session_cleanup,
  .send_mss = tcp_session_send_mss,
  .send_space = tcp_session_send_space,
  .update_time = tcp_update_time,
  .tx_fifo_offset = tcp_session_tx_fifo_offset,
  .flush_data = tcp_session_flush_data,
  .custom_tx = tcp_session_custom_tx,
  .format_connection = format_tcp_session,
  .format_listener = format_tcp_listener_session,
  .format_half_open = format_tcp_half_open_session,
  .transport_options = {
    .tx_type = TRANSPORT_TX_PEEK,
    .service_type = TRANSPORT_SERVICE_VC,
  },
}

Definition at line 1236 of file tcp.c.

vlib_cli_command_t tcp_replay_scoreboard_command

static

Initial value:

=
{
  .path = "tcp replay scoreboard",
  .short_help = "tcp replay scoreboard <connection>",
  .function = tcp_scoreboard_trace_fn,
}

(constructor) VLIB_CLI_COMMAND (tcp_replay_scoreboard_command)

Definition at line 2113 of file tcp.c.

vlib_cli_command_t tcp_show_scoreboard_trace_command

static

Initial value:

=
{
  .path = "show tcp scoreboard trace",
  .short_help = "show tcp scoreboard trace <connection>",
  .function = tcp_show_scoreboard_trace_fn,
}

(constructor) VLIB_CLI_COMMAND (tcp_show_scoreboard_trace_command)

Definition at line 1989 of file tcp.c.

vlib_cli_command_t tcp_src_address_command

static

Initial value:

=
{
  .path = "tcp src-address",
  .short_help = "tcp src-address <ip-addr> [- <ip-addr>] add src address range",
  .function = tcp_src_address,
}

(constructor) VLIB_CLI_COMMAND (tcp_src_address_command)

Definition at line 1926 of file tcp.c.

timer_expiration_handler* timer_expiration_handlers[TCP_N_TIMERS]

static

Initial value:

=
{
    tcp_timer_retransmit_handler,
    tcp_timer_delack_handler,
    tcp_timer_persist_handler,
    tcp_timer_waitclose_handler,
    tcp_timer_retransmit_syn_handler,
}

Definition at line 1361 of file tcp.c.