tcp.c File Reference

Include dependency graph for tcp.c:

Go to the source code of this file.

Macros
#define	PORT_MASK   ((1 << 16)- 1)

Functions
static u32	tcp_connection_bind (u32 session_index, ip46_address_t *ip, u16 port_host_byte_order, u8 is_ip4)
u32	tcp_session_bind_ip4 (u32 session_index, ip46_address_t *ip, u16 port_host_byte_order)
u32	tcp_session_bind_ip6 (u32 session_index, ip46_address_t *ip, u16 port_host_byte_order)
static void	tcp_connection_unbind (u32 listener_index)
u32	tcp_session_unbind (u32 listener_index)
transport_connection_t *	tcp_session_get_listener (u32 listener_index)
void	tcp_connection_cleanup (tcp_connection_t *tc)
	Cleans up connection state. More...
void	tcp_connection_del (tcp_connection_t *tc)
	Connection removal. More...
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...
void	tcp_session_close (u32 conn_index, u32 thread_index)
void	tcp_session_cleanup (u32 conn_index, u32 thread_index)
void *	ip_interface_get_first_ip (u32 sw_if_index, u8 is_ip4)
u16	tcp_allocate_local_port (tcp_main_t *tm, ip46_address_t *ip)
	Allocate local port and add if successful add entry to local endpoint table to mark the pair as used. More...
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_connection_init_vars (tcp_connection_t *tc)
	Initialize tcp connection variables. More...
int	tcp_connection_open (ip46_address_t *rmt_addr, u16 rmt_port, u8 is_ip4)
int	tcp_session_open_ip4 (ip46_address_t *addr, u16 port)
int	tcp_session_open_ip6 (ip46_address_t *addr, u16 port)
u8 *	format_tcp_state (u8 *s, va_list *args)
u8 *	format_tcp_timers (u8 *s, va_list *args)
u8 *	format_tcp_connection (u8 *s, va_list *args)
u8 *	format_tcp_connection_verbose (u8 *s, va_list *args)
u8 *	format_tcp_session (u8 *s, va_list *args)
u8 *	format_tcp_listener_session (u8 *s, va_list *args)
u8 *	format_tcp_half_open_session (u8 *s, va_list *args)
transport_connection_t *	tcp_session_get_transport (u32 conn_index, u32 thread_index)
transport_connection_t *	tcp_half_open_session_get_transport (u32 conn_index)
u16	tcp_session_send_mss (transport_connection_t *trans_conn)
u32	tcp_session_send_space (transport_connection_t *trans_conn)
u32	tcp_session_tx_fifo_offset (transport_connection_t *trans_conn)
void	tcp_timer_keep_handler (u32 conn_index)
void	tcp_timer_establish_handler (u32 conn_index)
void	tcp_timer_waitclose_handler (u32 conn_index)
static void	tcp_expired_timers_dispatch (u32 *expired_timers)
void	tcp_initialize_timer_wheels (tcp_main_t *tm)
clib_error_t *	tcp_main_enable (vlib_main_t *vm)
clib_error_t *	vnet_tcp_enable_disable (vlib_main_t *vm, u8 is_en)
clib_error_t *	tcp_init (vlib_main_t *vm)

Variables
tcp_main_t	tcp_main
const char *	tcp_dbg_evt_str []
const char *	tcp_fsm_states []
const char *	tcp_conn_timers []
static const transport_proto_vft_t	tcp4_proto
static const transport_proto_vft_t	tcp6_proto
static timer_expiration_handler *	timer_expiration_handlers [TCP_N_TIMERS]

Macro Definition Documentation

#define PORT_MASK   ((1 << 16)- 1)

Definition at line 241 of file tcp.c.

Function Documentation

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

Definition at line 482 of file tcp.c.

Here is the call graph for this function:

Here is the caller graph for this function:

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

Definition at line 505 of file tcp.c.

Here is the call graph for this function:

Here is the caller graph for this function:

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

Definition at line 533 of file tcp.c.

Here is the call graph for this function:

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

Definition at line 525 of file tcp.c.

Here is the call graph for this function:

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

Definition at line 514 of file tcp.c.

Here is the call graph for this function:

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

Definition at line 438 of file tcp.c.

Here is the call graph for this function:

Here is the caller graph for this function:

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

Definition at line 457 of file tcp.c.

Here is the call graph for this function:

Here is the caller graph for this function:

void* ip_interface_get_first_ip	(	u32	sw_if_index,
		u8	is_ip4
	)

Definition at line 213 of file tcp.c.

Here is the call graph for this function:

Here is the caller graph for this function:

u16 tcp_allocate_local_port	(	tcp_main_t *	tm,
		ip46_address_t *	ip
	)

Allocate local port and add if successful add entry to local endpoint table to mark the pair as used.

Definition at line 247 of file tcp.c.

Here is the call graph for this function:

Here is the caller graph for this function:

static u32 tcp_connection_bind ( u32  session_index, ip46_address_t *  ip, u16  port_host_byte_order, u8  is_ip4  )

static

Definition at line 24 of file tcp.c.

Here is the call graph for this function:

Here is the caller graph for this function:

void tcp_connection_cleanup

(

tcp_connection_t *

tc

)

Cleans up connection state.

No notifications.

Definition at line 99 of file tcp.c.

Here is the call graph for this function:

Here is the caller graph for this function:

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 170 of file tcp.c.

Here is the call graph for this function:

Here is the caller graph for this function:

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 135 of file tcp.c.

Here is the call graph for this function:

Here is the caller graph for this function:

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 327 of file tcp.c.

Here is the call graph for this function:

Here is the caller graph for this function:

int tcp_connection_open	(	ip46_address_t *	rmt_addr,
		u16	rmt_port,
		u8	is_ip4
	)

Definition at line 336 of file tcp.c.

Here is the call graph for this function:

Here is the caller graph for this function:

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 147 of file tcp.c.

Here is the call graph for this function:

Here is the caller graph for this function:

void tcp_connection_timers_init

(

tcp_connection_t *

tc

)

Initialize all connection timers as invalid.

Definition at line 296 of file tcp.c.

Here is the caller graph for this function:

void tcp_connection_timers_reset

(

tcp_connection_t *

tc

)

Stop all connection timers.

Definition at line 313 of file tcp.c.

Here is the call graph for this function:

Here is the caller graph for this function:

static void tcp_connection_unbind ( u32  listener_index )

static

Definition at line 69 of file tcp.c.

Here is the call graph for this function:

Here is the caller graph for this function:

static void tcp_expired_timers_dispatch ( u32 *  expired_timers )

static

Definition at line 687 of file tcp.c.

Here is the caller graph for this function:

transport_connection_t* tcp_half_open_session_get_transport

(

u32

conn_index

)

Definition at line 548 of file tcp.c.

Here is the call graph for this function:

clib_error_t* tcp_init

(

vlib_main_t *

vm

)

Definition at line 798 of file tcp.c.

Here is the call graph for this function:

Here is the caller graph for this function:

void tcp_initialize_timer_wheels

(

tcp_main_t *

tm

)

Definition at line 706 of file tcp.c.

Here is the call graph for this function:

Here is the caller graph for this function:

clib_error_t* tcp_main_enable

(

vlib_main_t *

vm

)

Definition at line 718 of file tcp.c.

Here is the call graph for this function:

Here is the caller graph for this function:

u32 tcp_session_bind_ip4	(	u32	session_index,
		ip46_address_t *	ip,
		u16	port_host_byte_order
	)

Definition at line 54 of file tcp.c.

Here is the call graph for this function:

u32 tcp_session_bind_ip6	(	u32	session_index,
		ip46_address_t *	ip,
		u16	port_host_byte_order
	)

Definition at line 61 of file tcp.c.

Here is the call graph for this function:

void tcp_session_cleanup	(	u32	conn_index,
		u32	thread_index
	)

Definition at line 202 of file tcp.c.

Here is the call graph for this function:

void tcp_session_close	(	u32	conn_index,
		u32	thread_index
	)

Definition at line 194 of file tcp.c.

Here is the call graph for this function:

transport_connection_t* tcp_session_get_listener

(

u32

listener_index

)

Definition at line 85 of file tcp.c.

Here is the call graph for this function:

transport_connection_t* tcp_session_get_transport	(	u32	conn_index,
		u32	thread_index
	)

Definition at line 541 of file tcp.c.

Here is the call graph for this function:

int tcp_session_open_ip4	(	ip46_address_t *	addr,
		u16	port
	)

Definition at line 414 of file tcp.c.

Here is the call graph for this function:

int tcp_session_open_ip6	(	ip46_address_t *	addr,
		u16	port
	)

Definition at line 420 of file tcp.c.

Here is the call graph for this function:

u16 tcp_session_send_mss

(

transport_connection_t *

trans_conn

)

Definition at line 555 of file tcp.c.

u32 tcp_session_send_space

(

transport_connection_t *

trans_conn

)

Definition at line 562 of file tcp.c.

Here is the call graph for this function:

u32 tcp_session_tx_fifo_offset

(

transport_connection_t *

trans_conn

)

Definition at line 569 of file tcp.c.

u32 tcp_session_unbind

(

u32

listener_index

)

Definition at line 78 of file tcp.c.

Here is the call graph for this function:

void tcp_timer_establish_handler

(

u32

conn_index

)

Definition at line 626 of file tcp.c.

Here is the call graph for this function:

void tcp_timer_keep_handler

(

u32

conn_index

)

Definition at line 614 of file tcp.c.

Here is the call graph for this function:

void tcp_timer_waitclose_handler

(

u32

conn_index

)

Definition at line 643 of file tcp.c.

Here is the call graph for this function:

clib_error_t* vnet_tcp_enable_disable	(	vlib_main_t *	vm,
		u8	is_en
	)

Definition at line 780 of file tcp.c.

Here is the call graph for this function:

Here is the caller graph for this function:

Variable Documentation

const transport_proto_vft_t tcp4_proto

static

Initial value:

= {
  .bind = tcp_session_bind_ip4,
  .unbind = tcp_session_unbind,
  .push_header = tcp_push_header,
  .get_connection = tcp_session_get_transport,
  .get_listener = tcp_session_get_listener,
  .get_half_open = tcp_half_open_session_get_transport,
  .open = tcp_session_open_ip4,
  .close = tcp_session_close,
  .cleanup = tcp_session_cleanup,
  .send_mss = tcp_session_send_mss,
  .send_space = tcp_session_send_space,
  .tx_fifo_offset = tcp_session_tx_fifo_offset,
  .format_connection = format_tcp_session,
  .format_listener = format_tcp_listener_session,
  .format_half_open = format_tcp_half_open_session,
}

Definition at line 576 of file tcp.c.

const transport_proto_vft_t tcp6_proto

static

Initial value:

= {
  .bind = tcp_session_bind_ip6,
  .unbind = tcp_session_unbind,
  .push_header = tcp_push_header,
  .get_connection = tcp_session_get_transport,
  .get_listener = tcp_session_get_listener,
  .get_half_open = tcp_half_open_session_get_transport,
  .open = tcp_session_open_ip6,
  .close = tcp_session_close,
  .cleanup = tcp_session_cleanup,
  .send_mss = tcp_session_send_mss,
  .send_space = tcp_session_send_space,
  .tx_fifo_offset = tcp_session_tx_fifo_offset,
  .format_connection = format_tcp_session,
  .format_listener = format_tcp_listener_session,
  .format_half_open = format_tcp_half_open_session,
}

Definition at line 594 of file tcp.c.

const char* tcp_conn_timers[]

Initial value:

= {
#define _(sym, str) 
  foreach_tcp_timer

}

Definition at line 450 of file tcp.c.

const char* tcp_dbg_evt_str[]

Initial value:

= {
#define _(sym, str) 
  foreach_tcp_dbg_evt

}

Definition at line 425 of file tcp.c.

const char* tcp_fsm_states[]

Initial value:

= {
#define _(sym, str) 
  foreach_tcp_fsm_state

}

Definition at line 431 of file tcp.c.

tcp_main_t tcp_main

Definition at line 21 of file tcp.c.

timer_expiration_handler* timer_expiration_handlers[TCP_N_TIMERS]

static

Initial value:

=
{
    tcp_timer_retransmit_handler,
    tcp_timer_delack_handler,
    0,
    tcp_timer_keep_handler,
    tcp_timer_waitclose_handler,
    tcp_timer_retransmit_syn_handler,
    tcp_timer_establish_handler
}

Definition at line 674 of file tcp.c.