Include dependency graph for session.h:

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

Data Structures
struct	session_tx_context_

struct	session_evt_elt

struct	session_worker_

struct	session_main_

Macros
#define	foreach_session_input_error

#define	SESSION_Q_PROCESS_FLUSH_FRAMES 1

#define	SESSION_Q_PROCESS_STOP 2

#define	session_cli_return_if_not_enabled()

Typedefs
typedef struct session_tx_context_	session_tx_context_t

typedef struct session_evt_elt	session_evt_elt_t

typedef struct session_worker_	session_worker_t

typedef int(	session_fifo_rx_fn) (session_worker_t wrk, vlib_node_runtime_t node, session_evt_elt_t e, int n_tx_packets)

typedef struct session_main_	session_main_t

Enumerations
enum	session_error_t { SESSION_N_ERROR }

Functions
u8	session_node_lookup_fifo_event (svm_fifo_t f, session_event_t e)

static session_evt_elt_t *	session_evt_elt_alloc (session_worker_t *wrk)

static void	session_evt_elt_free (session_worker_t wrk, session_evt_elt_t elt)

static void	session_evt_add_old (session_worker_t wrk, session_evt_elt_t elt)

static session_evt_elt_t *	session_evt_alloc_ctrl (session_worker_t *wrk)

static session_evt_elt_t *	session_evt_alloc_new (session_worker_t *wrk)

static session_evt_elt_t *	session_evt_alloc_old (session_worker_t *wrk)

static u8	session_is_valid (u32 si, u8 thread_index)

session_t *	session_alloc (u32 thread_index)

void	session_free (session_t *s)

void	session_free_w_fifos (session_t *s)

static session_t *	session_get (u32 si, u32 thread_index)

static session_t *	session_get_if_valid (u64 si, u32 thread_index)

static session_t *	session_get_from_handle (session_handle_t handle)

static session_t *	session_get_from_handle_if_valid (session_handle_t handle)

u64	session_segment_handle (session_t *s)

static void	session_pool_add_peeker (u32 thread_index)
	Acquires a lock that blocks a session pool from expanding. More...

static void	session_pool_remove_peeker (u32 thread_index)

static session_t *	session_get_from_handle_safe (u64 handle)
	Get session from handle and 'lock' pool resize if not in same thread. More...

static u32	session_get_index (session_t *s)

static session_t *	session_clone_safe (u32 session_index, u32 thread_index)

int	session_open (u32 app_index, session_endpoint_t *tep, u32 opaque)
	Ask transport to open connection to remote transport endpoint. More...

int	session_listen (session_t s, session_endpoint_cfg_t sep)
	Ask transport to listen on session endpoint. More...

int	session_stop_listen (session_t *s)
	Ask transport to stop listening on local transport endpoint. More...

void	session_close (session_t *s)
	Initialize session closing procedure. More...

void	session_transport_close (session_t *s)
	Notify transport the session can be disconnected. More...

void	session_transport_cleanup (session_t *s)
	Cleanup transport and session state. More...

int	session_send_io_evt_to_thread (svm_fifo_t *f, session_evt_type_t evt_type)

int	session_enqueue_notify (session_t *s)

int	session_dequeue_notify (session_t *s)

int	session_send_io_evt_to_thread_custom (void *data, u32 thread_index, session_evt_type_t evt_type)

void	session_send_rpc_evt_to_thread (u32 thread_index, void fp, void rpc_args)

void	session_send_rpc_evt_to_thread_force (u32 thread_index, void fp, void rpc_args)

void	session_add_self_custom_tx_evt (transport_connection_t *tc, u8 has_prio)

transport_connection_t *	session_get_transport (session_t *s)

void	session_get_endpoint (session_t s, transport_endpoint_t tep, u8 is_lcl)

u8 *	format_session (u8 s, va_list args)
	Format stream session as per the following format. More...

uword	unformat_session (unformat_input_t input, va_list args)

uword	unformat_transport_connection (unformat_input_t input, va_list args)

int	session_enqueue_stream_connection (transport_connection_t tc, vlib_buffer_t b, u32 offset, u8 queue_event, u8 is_in_order)

int	session_enqueue_dgram_connection (session_t s, session_dgram_hdr_t hdr, vlib_buffer_t *b, u8 proto, u8 queue_event)

int	session_stream_connect_notify (transport_connection_t *tc, u8 is_fail)

int	session_dgram_connect_notify (transport_connection_t tc, u32 old_thread_index, session_t *new_session)
	Move dgram session to the right thread. More...

int	session_stream_accept_notify (transport_connection_t *tc)

void	session_transport_closing_notify (transport_connection_t *tc)
	Notification from transport that connection is being closed. More...

void	session_transport_delete_notify (transport_connection_t *tc)
	Notification from transport that connection is being deleted. More...

void	session_transport_closed_notify (transport_connection_t *tc)
	Notification from transport that it is closed. More...

void	session_transport_reset_notify (transport_connection_t *tc)
	Notify application that connection has been reset. More...

int	session_stream_accept (transport_connection_t *tc, u32 listener_index, u32 thread_index, u8 notify)
	Accept a stream session. More...

void	session_register_transport (transport_proto_t transport_proto, const transport_proto_vft_t *vft, u8 is_ip4, u32 output_node)
	Initialize session layer for given transport proto and ip version. More...

int	session_tx_fifo_peek_bytes (transport_connection_t tc, u8 buffer, u32 offset, u32 max_bytes)

u32	session_tx_fifo_dequeue_drop (transport_connection_t *tc, u32 max_bytes)

static u32	transport_max_rx_enqueue (transport_connection_t *tc)

static u32	transport_max_tx_dequeue (transport_connection_t *tc)

static u32	transport_max_rx_dequeue (transport_connection_t *tc)

static u32	transport_rx_fifo_size (transport_connection_t *tc)

static u32	transport_tx_fifo_size (transport_connection_t *tc)

static u8	transport_rx_fifo_has_ooo_data (transport_connection_t *tc)

static f64	transport_time_now (u32 thread_index)

static void	transport_add_tx_event (transport_connection_t *tc)

static u64	listen_session_get_handle (session_t *s)

static session_t *	listen_session_get_from_handle (session_handle_t handle)

static void	listen_session_parse_handle (session_handle_t handle, u32 index, u32 thread_index)

static session_t *	listen_session_alloc (u8 thread_index, session_type_t type)

static session_t *	listen_session_get (u32 ls_index)

static void	listen_session_free (session_t *s)

transport_connection_t *	listen_session_get_transport (session_t *s)

static session_main_t *	vnet_get_session_main ()

static session_worker_t *	session_main_get_worker (u32 thread_index)

static svm_msg_q_t *	session_main_get_vpp_event_queue (u32 thread_index)

static u8	session_main_is_enabled ()

int	session_main_flush_enqueue_events (u8 proto, u32 thread_index)
	Flushes queue of sessions that are to be notified of new data enqueued events. More...

int	session_main_flush_all_enqueue_events (u8 transport_proto)

void	session_flush_frames_main_thread (vlib_main_t *vm)

ssvm_private_t *	session_main_get_evt_q_segment (void)

void	session_node_enable_disable (u8 is_en)

clib_error_t *	vnet_session_enable_disable (vlib_main_t *vm, u8 is_en)

Variables
session_fifo_rx_fn	session_tx_fifo_peek_and_snd

session_fifo_rx_fn	session_tx_fifo_dequeue_and_snd

session_fifo_rx_fn	session_tx_fifo_dequeue_internal

session_main_t	session_main

vlib_node_registration_t	session_queue_node
	(constructor) VLIB_REGISTER_NODE (session_queue_node) More...

vlib_node_registration_t	session_queue_process_node
	(constructor) VLIB_REGISTER_NODE (session_queue_process_node) More...

vlib_node_registration_t	session_queue_pre_input_node
	(constructor) VLIB_REGISTER_NODE (session_queue_pre_input_node) More...

Macro Definition Documentation

#define foreach_session_input_error

Value:

_(NO_SESSION, "No session drops")                                       \
_(NO_LISTENER, "No listener for dst port drops")                        \
_(ENQUEUED, "Packets pushed into rx fifo")                              \
_(NOT_READY, "Session not ready packets")                               \
_(FIFO_FULL, "Packets dropped for lack of rx fifo space")               \
_(EVENT_FIFO_FULL, "Events not sent for lack of event fifo space")      \
_(API_QUEUE_FULL, "Sessions not created for lack of API queue space")   \
_(NEW_SEG_NO_SPACE, "Created segment, couldn't allocate a fifo pair")   \
_(NO_SPACE, "Couldn't allocate a fifo pair")                            \
_(SEG_CREATE, "Couldn't create a new segment")

Definition at line 25 of file session.h.

#define session_cli_return_if_not_enabled ( )

Value:

do {                                                                    \
    if (!session_main.is_enabled)                               \
      return clib_error_return(0, "session layer is not enabled");      \
} while (0)

Definition at line 565 of file session.h.

#define SESSION_Q_PROCESS_FLUSH_FRAMES 1

Definition at line 186 of file session.h.

#define SESSION_Q_PROCESS_STOP 2

Definition at line 187 of file session.h.

Typedef Documentation

typedef struct session_evt_elt session_evt_elt_t

typedef int( session_fifo_rx_fn) (session_worker_t *wrk, vlib_node_runtime_t *node, session_evt_elt_t *e, int *n_tx_packets)

Definition at line 117 of file session.h.

typedef struct session_main_ session_main_t

typedef struct session_tx_context_ session_tx_context_t

typedef struct session_worker_ session_worker_t

Enumeration Type Documentation

enum session_error_t

Enumerator
SESSION_N_ERROR

Definition at line 37 of file session.h.

Function Documentation

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

Format stream session as per the following format.

verbose: "Connection", "Rx fifo", "Tx fifo", "Session Index" non-verbose: "Connection"

Definition at line 55 of file session_cli.c.

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static session_t* listen_session_alloc	(	u8	thread_index,
		session_type_t	type
	)

inlinestatic

Definition at line 514 of file session.h.

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static void listen_session_free ( session_t * s )

inlinestatic

Definition at line 530 of file session.h.

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static session_t* listen_session_get ( u32 ls_index )

inlinestatic

Definition at line 524 of file session.h.

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static session_t* listen_session_get_from_handle ( session_handle_t handle )

inlinestatic

Definition at line 501 of file session.h.

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static u64 listen_session_get_handle ( session_t * s )

inlinestatic

Definition at line 493 of file session.h.

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transport_connection_t* listen_session_get_transport ( session_t * s )

Definition at line 1421 of file session.c.

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static void listen_session_parse_handle	(	session_handle_t	handle,
		u32 *	index,
		u32 *	thread_index
	)

inlinestatic

Definition at line 507 of file session.h.

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void session_add_self_custom_tx_evt	(	transport_connection_t *	tc,
		u8	has_prio
	)

Definition at line 122 of file session.c.

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session_t* session_alloc ( u32 thread_index )

Definition at line 168 of file session.c.

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static session_t* session_clone_safe	(	u32	session_index,
		u32	thread_index
	)

inlinestatic

Definition at line 355 of file session.h.

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void session_close ( session_t * s )

Initialize session closing procedure.

Request is always sent to session node to ensure that all outstanding requests are served before transport is notified.

Definition at line 1186 of file session.c.

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int session_dequeue_notify ( session_t * s )

Definition at line 601 of file session.c.

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int session_dgram_connect_notify	(	transport_connection_t *	tc,
		u32	old_thread_index,
		session_t **	new_session
	)

Move dgram session to the right thread.

Definition at line 787 of file session.c.

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int session_enqueue_dgram_connection	(	session_t *	s,
		session_dgram_hdr_t *	hdr,
		vlib_buffer_t *	b,
		u8	proto,
		u8	queue_event
	)

Definition at line 439 of file session.c.

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int session_enqueue_notify ( session_t * s )

Definition at line 563 of file session.c.

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int session_enqueue_stream_connection	(	transport_connection_t *	tc,
		vlib_buffer_t *	b,
		u32	offset,
		u8	queue_event,
		u8	is_in_order
	)

Definition at line 386 of file session.c.

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static void session_evt_add_old	(	session_worker_t *	wrk,
		session_evt_elt_t *	elt
	)

inlinestatic

Definition at line 204 of file session.h.

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static session_evt_elt_t* session_evt_alloc_ctrl ( session_worker_t * wrk )

inlinestatic

Definition at line 211 of file session.h.

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static session_evt_elt_t* session_evt_alloc_new ( session_worker_t * wrk )

inlinestatic

Definition at line 221 of file session.h.

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static session_evt_elt_t* session_evt_alloc_old ( session_worker_t * wrk )

inlinestatic

Definition at line 231 of file session.h.

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static session_evt_elt_t* session_evt_elt_alloc ( session_worker_t * wrk )

inlinestatic

Definition at line 190 of file session.h.

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static void session_evt_elt_free	(	session_worker_t *	wrk,
		session_evt_elt_t *	elt
	)

inlinestatic

Definition at line 198 of file session.h.

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void session_flush_frames_main_thread ( vlib_main_t * vm )

Definition at line 1428 of file session.c.

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void session_free ( session_t * s )

Definition at line 194 of file session.c.

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void session_free_w_fifos ( session_t * s )

Definition at line 219 of file session.c.

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static session_t* session_get	(	u32	si,
		u32	thread_index
	)

inlinestatic

Definition at line 258 of file session.h.

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void session_get_endpoint	(	session_t *	s,
		transport_endpoint_t *	tep,
		u8	is_lcl
	)

Definition at line 1409 of file session.c.

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static session_t* session_get_from_handle ( session_handle_t handle )

inlinestatic

Definition at line 278 of file session.h.

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static session_t* session_get_from_handle_if_valid ( session_handle_t handle )

inlinestatic

Definition at line 287 of file session.h.

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static session_t* session_get_from_handle_safe ( u64 handle )

inlinestatic

Get session from handle and 'lock' pool resize if not in same thread.

Caller should drop the peek 'lock' as soon as possible.

Definition at line 330 of file session.h.

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static session_t* session_get_if_valid	(	u64	si,
		u32	thread_index
	)

inlinestatic

Definition at line 265 of file session.h.

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static u32 session_get_index ( session_t * s )

inlinestatic

Definition at line 349 of file session.h.

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transport_connection_t* session_get_transport ( session_t * s )

Definition at line 1398 of file session.c.

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static u8 session_is_valid	(	u32	si,
		u8	thread_index
	)

inlinestatic

Definition at line 241 of file session.h.

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int session_listen	(	session_t *	ls,
		session_endpoint_cfg_t *	sep
	)

Ask transport to listen on session endpoint.

Parameters

s	Session for which listen will be called. Note that unlike established sessions, listen sessions are not associated to a thread.
sep	Local endpoint to be listened on.

Definition at line 1133 of file session.c.

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int session_main_flush_all_enqueue_events ( u8 transport_proto )

Definition at line 660 of file session.c.

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int session_main_flush_enqueue_events	(	u8	transport_proto,
		u32	thread_index
	)

Flushes queue of sessions that are to be notified of new data enqueued events.

Parameters

thread_index Thread index for which the flush is to be performed.

Returns: 0 on success or a positive number indicating the number of failures due to API queue being full.

Definition at line 631 of file session.c.

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ssvm_private_t* session_main_get_evt_q_segment ( void )

Definition at line 1331 of file session.c.

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static svm_msg_q_t* session_main_get_vpp_event_queue ( u32 thread_index )

inlinestatic

Definition at line 554 of file session.h.

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static session_worker_t* session_main_get_worker ( u32 thread_index )

inlinestatic

Definition at line 548 of file session.h.

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static u8 session_main_is_enabled ( )

inlinestatic

Definition at line 560 of file session.h.

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void session_node_enable_disable ( u8 is_en )

Definition at line 1509 of file session.c.

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u8 session_node_lookup_fifo_event	(	svm_fifo_t *	f,
		session_event_t *	e
	)

Definition at line 1169 of file session_node.c.

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int session_open	(	u32	app_wrk_index,
		session_endpoint_t *	rmt,
		u32	opaque
	)

Ask transport to open connection to remote transport endpoint.

Stores handle for matching request with reply since the call can be asynchronous. For instance, for TCP the 3-way handshake must complete before reply comes. Session is only created once connection is established.

Parameters

app_index	Index of the application requesting the connect
st	Session type requested.
tep	Remote transport endpoint
opaque	Opaque data (typically, api_context) the application expects on open completion.

Definition at line 1117 of file session.c.

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static void session_pool_add_peeker ( u32 thread_index )

inlinestatic

Acquires a lock that blocks a session pool from expanding.

This is typically used for safely peeking into other threads' pools in order to clone elements. Lock should be dropped as soon as possible by calling session_pool_remove_peeker.

NOTE: Avoid using pool_elt_at_index while the lock is held because it may lead to free elt bitmap expansion/contraction!

Definition at line 307 of file session.h.

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static void session_pool_remove_peeker ( u32 thread_index )

inlinestatic

Definition at line 316 of file session.h.

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void session_register_transport	(	transport_proto_t	transport_proto,
		const transport_proto_vft_t *	vft,
		u8	is_ip4,
		u32	output_node
	)

Initialize session layer for given transport proto and ip version.

Allocates per session type (transport proto + ip version) data structures and adds arc from session queue node to session type output node.

Definition at line 1368 of file session.c.

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u64 session_segment_handle ( session_t * s )

Definition at line 1340 of file session.c.

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int session_send_io_evt_to_thread	(	svm_fifo_t *	f,
		session_evt_type_t	evt_type
	)

Definition at line 79 of file session.c.

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int session_send_io_evt_to_thread_custom	(	void *	data,
		u32	thread_index,
		session_evt_type_t	evt_type
	)

Definition at line 86 of file session.c.

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void session_send_rpc_evt_to_thread	(	u32	thread_index,
		void *	fp,
		void *	rpc_args
	)

Definition at line 110 of file session.c.

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void session_send_rpc_evt_to_thread_force	(	u32	thread_index,
		void *	fp,
		void *	rpc_args
	)

Definition at line 102 of file session.c.

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int session_stop_listen ( session_t * s )

Ask transport to stop listening on local transport endpoint.

Parameters

s	Session to stop listening on. It must be in state LISTENING.

Definition at line 1161 of file session.c.

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int session_stream_accept	(	transport_connection_t *	tc,
		u32	listener_index,
		u32	thread_index,
		u8	notify
	)

Accept a stream session.

Optionally ping the server by callback.

Definition at line 983 of file session.c.

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int session_stream_accept_notify ( transport_connection_t * tc )

Definition at line 966 of file session.c.

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int session_stream_connect_notify	(	transport_connection_t *	tc,
		u8	is_fail
	)

Definition at line 729 of file session.c.

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void session_transport_cleanup ( session_t * s )

Cleanup transport and session state.

Notify transport of the cleanup and free the session. This should be called only if transport reported some error and is already closed.

Definition at line 1245 of file session.c.

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void session_transport_close ( session_t * s )

Notify transport the session can be disconnected.

This should eventually result in a delete notification that allows us to cleanup session state. Called for both active/passive disconnects.

Must be called from the session's thread.

Definition at line 1213 of file session.c.

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void session_transport_closed_notify ( transport_connection_t * tc )

Notification from transport that it is closed.

Should be called by transport, prior to calling delete notify, once it knows that no more data will be exchanged. This could serve as an early acknowledgment of an active close especially if transport delete can be delayed a long time, e.g., tcp time-wait.

Definition at line 916 of file session.c.

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void session_transport_closing_notify ( transport_connection_t * tc )

Notification from transport that connection is being closed.

A disconnect is sent to application but state is not removed. Once disconnect is acknowledged by application, session disconnect is called. Ultimately this leads to close being called on transport (passive close).

Definition at line 829 of file session.c.

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void session_transport_delete_notify ( transport_connection_t * tc )

Notification from transport that connection is being deleted.

This removes the session if it is still valid. It should be called only on previously fully established sessions. For instance failed connects should call stream_session_connect_notify and indicate that the connect has failed.

Definition at line 851 of file session.c.

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void session_transport_reset_notify ( transport_connection_t * tc )

Notify application that connection has been reset.

Definition at line 951 of file session.c.

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u32 session_tx_fifo_dequeue_drop	(	transport_connection_t *	tc,
		u32	max_bytes
	)

Definition at line 483 of file session.c.

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int session_tx_fifo_peek_bytes	(	transport_connection_t *	tc,
		u8 *	buffer,
		u32	offset,
		u32	max_bytes
	)

Definition at line 475 of file session.c.

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static void transport_add_tx_event ( transport_connection_t * tc )

inlinestatic

Definition at line 480 of file session.h.

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static u32 transport_max_rx_dequeue ( transport_connection_t * tc )

inlinestatic

Definition at line 446 of file session.h.

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static u32 transport_max_rx_enqueue ( transport_connection_t * tc )

inlinestatic

Definition at line 432 of file session.h.

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static u32 transport_max_tx_dequeue ( transport_connection_t * tc )

inlinestatic

Definition at line 439 of file session.h.

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static u8 transport_rx_fifo_has_ooo_data ( transport_connection_t * tc )

inlinestatic

Definition at line 467 of file session.h.

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static u32 transport_rx_fifo_size ( transport_connection_t * tc )

inlinestatic

Definition at line 453 of file session.h.

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static f64 transport_time_now ( u32 thread_index )

inlinestatic

Definition at line 474 of file session.h.

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static u32 transport_tx_fifo_size ( transport_connection_t * tc )

inlinestatic

Definition at line 460 of file session.h.

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uword unformat_session	(	unformat_input_t *	input,
		va_list *	args
	)

Definition at line 165 of file session_cli.c.

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uword unformat_transport_connection	(	unformat_input_t *	input,
		va_list *	args
	)

Definition at line 196 of file session_cli.c.

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static session_main_t* vnet_get_session_main ( )

inlinestatic

Definition at line 542 of file session.h.

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clib_error_t* vnet_session_enable_disable	(	vlib_main_t *	vm,
		u8	is_en
	)

Definition at line 1543 of file session.c.

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Variable Documentation

session_main_t session_main

Definition at line 26 of file session.c.

vlib_node_registration_t session_queue_node

Initial value:

=
{
  .function = session_queue_node_fn,
  .name = "session-queue",
  .format_trace = format_session_queue_trace,
  .type = VLIB_NODE_TYPE_INPUT,
  .n_errors = ARRAY_LEN (session_queue_error_strings),
  .error_strings = session_queue_error_strings,
  .state = VLIB_NODE_STATE_DISABLED,
}

(constructor) VLIB_REGISTER_NODE (session_queue_node)

Definition at line 1067 of file session_node.c.

vlib_node_registration_t session_queue_pre_input_node

(constructor) VLIB_REGISTER_NODE (session_queue_pre_input_node)

Definition at line 1294 of file session_node.c.

vlib_node_registration_t session_queue_process_node

(constructor) VLIB_REGISTER_NODE (session_queue_process_node)

Definition at line 1274 of file session_node.c.

session_fifo_rx_fn session_tx_fifo_dequeue_and_snd

session_fifo_rx_fn session_tx_fifo_dequeue_internal

session_fifo_rx_fn session_tx_fifo_peek_and_snd

Data Structures

Macros

Typedefs

Enumerations

Functions

Variables

Macro Definition Documentation

Typedef Documentation

Enumeration Type Documentation

Function Documentation

Variable Documentation