#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <sys/socket.h>
#include <unistd.h>
#include "common_definitions.h"
#include "configuration.h"
#include "log.h"
#include "net_definitions.h"
#include "net_utils.h"
#include "socket_helpers.h"
#include "ssdp_filter.h"
#include "ssdp_cache.h"
#include "ssdp_cache_display.h"
#include "ssdp_cache_output_format.h"
#include "ssdp_common.h"
#include "ssdp_listener.h"
#include "ssdp_message.h"
#include "ssdp_static_defs.h"

Include dependency graph for ssdp_listener.c:

Macros
#define	LISTEN_QUEUE_LENGTH 5

#define	SSDP_PASSIVE_LISTENER_TIMEOUT 10

#define	SSDP_ACTIVE_LISTENER_TIMEOUT 2

Functions
static int	ssdp_listener_init (ssdp_listener_s listener, configuration_s conf, BOOL is_active, int port, int recv_timeout)

int	ssdp_passive_listener_init (ssdp_listener_s listener, configuration_s conf)

int	ssdp_active_listener_init (ssdp_listener_s listener, configuration_s conf, int port)

void	ssdp_listener_close (ssdp_listener_s *listener)

void	ssdp_listener_read (ssdp_listener_s listener, ssdp_recv_node_s recv_node)

int	ssdp_listener_start (ssdp_listener_s listener, configuration_s conf)

void	ssdp_listener_stop (ssdp_listener_s *listener)

Detailed Description

Create, manage and delete a SSDP listener.

Copyright: 2017 Andreas Bank, andre.nosp@m.as.m.nosp@m.ikael.nosp@m..ban.nosp@m.k@gma.nosp@m.il.c.nosp@m.om

Definition in file ssdp_listener.c.

Macro Definition Documentation

#define LISTEN_QUEUE_LENGTH 5

The queue length for the listener (how many queued connections)

Definition at line 29 of file ssdp_listener.c.

#define SSDP_ACTIVE_LISTENER_TIMEOUT 2

The timeout after which the active SSDP listener will stop waiting for nodes to answer a SEARCH probe/message.

Definition at line 39 of file ssdp_listener.c.

#define SSDP_PASSIVE_LISTENER_TIMEOUT 10

The timeout after which the passive SSDP listener will stop a connection to a discovered node when fetching ewxtra information.

Definition at line 34 of file ssdp_listener.c.

Function Documentation

int ssdp_active_listener_init	(	ssdp_listener_s *	listener,
		configuration_s *	conf,
		int	port
	)

Create an active (unicast) SSDP listener. This type of listener is used to listen to SSDP query responses. Sets errno to the error number on failure.

Parameters

listener	The listener to init.
conf	The global configuration.
port	The port to listen at.

Returns: A SSDP listener.

Definition at line 111 of file ssdp_listener.c.

void ssdp_listener_close ( ssdp_listener_s * listener )

Destroy the passed SSDP listener.

Parameters

listener The SSDP listener to destroy.

Definition at line 118 of file ssdp_listener.c.

static int ssdp_listener_init	(	ssdp_listener_s *	listener,
		configuration_s *	conf,
		BOOL	is_active,
		int	port,
		int	recv_timeout
	)

static

Initialize a SSDP listener. This parses and sets the forwarder address, creates a socket and sets all applicable configuration values to it.

Parameters

listener	The listener to initialize.
conf	The configuration to use.
active	TRUE if an active SSDP listener is to be initialized.
port	The port to listen on. 0 will set the port to the SSDP port.
recv_timeout	The timeout to set for receiveing/waiting for SSDP nodes to respond to a SEARCH query.

Returns: 0 on success, errno otherwise.

Definition at line 54 of file ssdp_listener.c.

void ssdp_listener_read	(	ssdp_listener_s *	listener,
		ssdp_recv_node_s *	recv_node
	)

Read from the listener. Blocks untill timeout if no data to read.

Parameters

listener	The listener to read from.
recv_node	Information about the node (client) that sent data.

Definition at line 127 of file ssdp_listener.c.

int ssdp_listener_start	(	ssdp_listener_s *	listener,
		configuration_s *	conf
	)

Tells the SSDP listener to start listening to SSDP messages. This function should not be called on an active SSDP listener (call ssdp_listener_read() after ssdp_active_listener_init() instead).

Parameters

listener	The SSDP listener to start.
conf	The global configuration to use.

Non-0 value on error. This function does not return if no error ocurrs.

Definition at line 144 of file ssdp_listener.c.

void ssdp_listener_stop ( ssdp_listener_s * listener )

Tells the SSDP listener to stop listening.

Parameters

The	listener to stop.

Definition at line 287 of file ssdp_listener.c.

int ssdp_passive_listener_init	(	ssdp_listener_s *	listener,
		configuration_s *	conf
	)

Create a passive (multicast) SSDP listener. This type of listener is used to passively listen to SSDP messages sent over a network. Sets errno to the error number on failure.

Parameters

listener	The listener to init.
conf	the global configuration.

Returns: A SSDP listener.

Definition at line 104 of file ssdp_listener.c.

Macros

Functions

Detailed Description

Macro Definition Documentation

Function Documentation