#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <sys/socket.h>
#include <sys/syslog.h>
#include <sys/types.h>
#include "dlt_daemon_connection_types.h"
#include "dlt_daemon_connection.h"
#include "dlt_daemon_event_handler_types.h"
#include "dlt_daemon_event_handler.h"
#include "dlt-daemon.h"
#include "dlt-daemon_cfg.h"
#include "dlt_daemon_common.h"
#include "dlt_common.h"
#include "dlt_gateway.h"
#include "dlt_daemon_socket.h"

Include dependency graph for dlt_daemon_connection.c:

Functions
STATIC int	dlt_connection_send (DltConnection conn, void msg, size_t msg_size)
	Generic sending function. More...

int	dlt_connection_send_multiple (DltConnection con, void data1, int size1, void *data2, int size2, int sendserialheader)
	Send up to two messages through a connection. More...

DltConnection *	dlt_connection_get_next (DltConnection *current, int type_mask)
	Get the next connection filtered with a type mask. More...

STATIC void	dlt_connection_destroy_receiver (DltConnection *con)

STATIC DltReceiver *	dlt_connection_get_receiver (DltDaemonLocal *daemon_local, DltConnectionType type, int fd)
	Get the receiver structure associated to a connection. More...

void *	dlt_connection_get_callback (DltConnection *con)
	Get the callback from a specific connection. More...

void	dlt_connection_destroy (DltConnection *to_destroy)
	Destroys a connection. More...

int	dlt_connection_create (DltDaemonLocal daemon_local, DltEventHandler evh, int fd, int mask, DltConnectionType type)
	Creates a connection and registers it to the DltEventHandler. More...

Variables
static DltConnectionId	connectionId

Detailed Description

Author: Frederic Berat fbera.nosp@m.t@de.nosp@m..adit.nosp@m.-jv..nosp@m.com

Copyright: Copyright © 2015 Advanced Driver Information Technology.
License MPL-2.0: Mozilla Public License version 2.0 http://mozilla.org/MPL/2.0/.

Definition in file dlt_daemon_connection.c.

Function Documentation

int dlt_connection_create	(	DltDaemonLocal *	daemon_local,
		DltEventHandler *	evh,
		int	fd,
		int	mask,
		DltConnectionType	type
	)

Creates a connection and registers it to the DltEventHandler.

The function will allocate memory for the connection, and give the pointer to the DltEventHandler in order to register it for incoming events. The connection is then destroyed later on, once it's not needed anymore or it the event handler is destroyed.

Parameters

daemon_local	Structure were some needed information is.
evh	DltEventHandler to register the connection to.
fd	File descriptor of the connection.
mask	Event list bit mask.
type	Connection type.

Returns: 0 On success, -1 otherwise.

Definition at line 346 of file dlt_daemon_connection.c.

References ACTIVE, connectionId, dlt_connection_get_receiver(), DLT_DAEMON_TEXTBUFSIZE, dlt_event_handler_find_connection(), dlt_event_handler_register_connection(), dlt_log(), DltConnection::id, NULL, DltConnection::receiver, DltConnection::status, and DltConnection::type.

Referenced by create_timer_fd(), dlt_daemon_init_fifo(), dlt_daemon_init_serial(), dlt_daemon_local_connection_init(), dlt_daemon_process_client_connect(), dlt_daemon_process_control_connect(), dlt_gateway_establish_connections(), and dlt_gateway_process_on_demand_request().

void dlt_connection_destroy ( DltConnection * to_destroy )

Destroys a connection.

This function closes and frees the corresponding connection. This is expected to be called by the connection owner: the DltEventHandler. Ownership of the connection is given during the registration to the DltEventHandler.

Parameters

to_destroy Connection to be destroyed.

Definition at line 320 of file dlt_daemon_connection.c.

References dlt_connection_destroy_receiver(), DLT_CONNECTION_TYPE_MAX, DltReceiver::fd, DltConnection::id, DltConnection::receiver, and DltConnection::type.

Referenced by dlt_daemon_remove_connection().

STATIC void dlt_connection_destroy_receiver ( DltConnection * con )

Definition at line 161 of file dlt_daemon_connection.c.

References DLT_CONNECTION_GATEWAY, dlt_receiver_free(), NULL, DltConnection::receiver, and DltConnection::type.

Referenced by dlt_connection_destroy().

void* dlt_connection_get_callback ( DltConnection * con )

Get the callback from a specific connection.

The callback retrieved that way is used to handle event for this connection. It as been chosen to proceed that way instead of having the callback directly in the structure in order to have some way to check that the structure is still valid, or at least gracefully handle errors instead of crashing.

Parameters

con	The connection to retrieve the callback from.

Returns: Function pointer or NULL.

Definition at line 257 of file dlt_daemon_connection.c.

References DLT_CONNECTION_APP_MSG, DLT_CONNECTION_CLIENT_CONNECT, DLT_CONNECTION_CLIENT_MSG_SERIAL, DLT_CONNECTION_CLIENT_MSG_TCP, DLT_CONNECTION_CONTROL_CONNECT, DLT_CONNECTION_CONTROL_MSG, DLT_CONNECTION_GATEWAY, DLT_CONNECTION_GATEWAY_TIMER, DLT_CONNECTION_ONE_S_TIMER, DLT_CONNECTION_SIXTY_S_TIMER, DLT_CONNECTION_SYSTEMD_TIMER, DLT_CONNECTION_TYPE_MAX, dlt_daemon_process_client_connect(), dlt_daemon_process_client_messages(), dlt_daemon_process_client_messages_serial(), dlt_daemon_process_control_connect(), dlt_daemon_process_control_messages(), dlt_daemon_process_one_s_timer(), dlt_daemon_process_sixty_s_timer(), dlt_daemon_process_systemd_timer(), dlt_daemon_process_user_messages(), dlt_gateway_process_gateway_timer(), dlt_gateway_process_passive_node_messages(), NULL, and DltConnection::type.

Referenced by dlt_daemon_handle_event().

DltConnection* dlt_connection_get_next	(	DltConnection *	current,
		int	type_mask
	)

Get the next connection filtered with a type mask.

In some cases we need the next connection available of a specific type or specific different types. This function returns the next available connection that is of one of the types included in the mask. The current connection can be returned.

Parameters

current	The current connection pointer.
type_mask	A bit mask representing the connection types to be filtered.

Returns: The next available connection of the considered types or NULL.

Definition at line 151 of file dlt_daemon_connection.c.

References DltConnection::next, and DltConnection::type.

Referenced by dlt_daemon_client_send_all_multiple().

STATIC DltReceiver* dlt_connection_get_receiver	(	DltDaemonLocal *	daemon_local,
		DltConnectionType	type,
		int	fd
	)

Get the receiver structure associated to a connection.

The receiver structure is sometimes needed while handling the event. This behavior is mainly due to the fact that it's not intended to modify the whole design of the daemon while implementing the new event handling. Based on the connection type provided, this function returns the pointer to the DltReceiver structure corresponding.

Parameters

dameon_local	Structure where to take the DltReceiver pointer from.
type	Type of the connection.
fd	File descriptor

Returns: DltReceiver structure or NULL if none corresponds to the type.

Definition at line 193 of file dlt_daemon_connection.c.

References DLT_CONNECTION_APP_MSG, DLT_CONNECTION_CLIENT_CONNECT, DLT_CONNECTION_CLIENT_MSG_SERIAL, DLT_CONNECTION_CLIENT_MSG_TCP, DLT_CONNECTION_CONTROL_CONNECT, DLT_CONNECTION_CONTROL_MSG, DLT_CONNECTION_GATEWAY, DLT_CONNECTION_GATEWAY_TIMER, DLT_CONNECTION_ONE_S_TIMER, DLT_CONNECTION_SIXTY_S_TIMER, DLT_CONNECTION_SYSTEMD_TIMER, DLT_DAEMON_RCVBUFSIZE, DLT_DAEMON_RCVBUFSIZESERIAL, DLT_DAEMON_RCVBUFSIZESOCK, dlt_gateway_get_connection_receiver(), dlt_receiver_init(), NULL, and DltDaemonLocal::pGateway.

Referenced by dlt_connection_create().

STATIC int dlt_connection_send	(	DltConnection *	conn,
		void *	msg,
		size_t	msg_size
	)

Generic sending function.

We manage different type of connection which have similar send/write functions. We can then abstract the data transfer using this function, moreover as we often transfer data to different kind of connection within the same loop.

Parameters

conn	The connection structure.
msg	The message buffer to be sent
msg_size	The length of the message to be sent

Returns: The amount of bytes send on success, -1 otherwise. errno is appropriately set.

Definition at line 67 of file dlt_daemon_connection.c.

References DLT_CONNECTION_CLIENT_MSG_SERIAL, DLT_CONNECTION_CLIENT_MSG_TCP, DLT_CONNECTION_TYPE_MAX, DLT_DAEMON_ERROR_OK, DLT_DAEMON_ERROR_UNKNOWN, dlt_daemon_socket_sendreliable(), DltReceiver::fd, NULL, DltConnection::receiver, and DltConnection::type.

Referenced by dlt_connection_send_multiple().

int dlt_connection_send_multiple	(	DltConnection *	con,
		void *	data1,
		int	size1,
		void *	data2,
		int	size2,
		int	sendserialheader
	)

Send up to two messages through a connection.

We often need to send 2 messages through a specific connection, plus the serial header. This function groups these different calls.

Parameters

con	The connection to send the messages through.
data1	The first message to be sent.
size1	The size of the first message.
data2	The second message to be send.
size2	The second message size.
sendserialheader	Whether we need or not to send the serial header.

Returns: DLT_DAEMON_ERROR_OK on success, -1 otherwise. errno is properly set.

Definition at line 105 of file dlt_daemon_connection.c.

References dlt_connection_send(), DLT_DAEMON_ERROR_UNKNOWN, DLT_RETURN_OK, dltSerialHeader, and NULL.

Referenced by dlt_daemon_client_send_all_multiple().

Variable Documentation

DltConnectionId connectionId

static

Definition at line 51 of file dlt_daemon_connection.c.

Referenced by dlt_connection_create().

Functions

Variables

Detailed Description

Function Documentation

Variable Documentation