Sockets BSD-Like API module. More...

Functions
static int	lwip_socket_register_membership (int s, const ip4_addr_t if_addr, const ip4_addr_t multi_addr)
	Register a new IGMP membership.
static void	lwip_socket_unregister_membership (int s, const ip4_addr_t if_addr, const ip4_addr_t multi_addr)
	Unregister a previously registered membership.
static void	lwip_socket_drop_registered_memberships (int s)
	Drop all memberships of a socket that were not dropped explicitly via setsockopt.
static void	event_callback (struct netconn *conn, enum netconn_evt evt, u16_t len)
	Callback registered in the netconn layer for each socket-netconn.
static void	lwip_getsockopt_callback (void *arg)
	lwip_getsockopt_callback: only used without CORE_LOCKING to get into the tcpip_thread
static void	lwip_setsockopt_callback (void *arg)
	lwip_setsockopt_callback: only used without CORE_LOCKING to get into the tcpip_thread
static u8_t	lwip_getsockopt_impl (int s, int level, int optname, void optval, socklen_t optlen)
	lwip_getsockopt_impl: the actual implementation of getsockopt: same argument as lwip_getsockopt, either called directly or through callback
static u8_t	lwip_setsockopt_impl (int s, int level, int optname, const void *optval, socklen_t optlen)
	lwip_setsockopt_impl: the actual implementation of setsockopt: same argument as lwip_setsockopt, either called directly or through callback
void	lwip_socket_thread_init (void)
	LWIP_NETCONN_SEM_PER_THREAD==1: initialize thread-local semaphore.
void	lwip_socket_thread_cleanup (void)
	LWIP_NETCONN_SEM_PER_THREAD==1: destroy thread-local semaphore.
static struct lwip_sock *	get_socket (int s)
	Map a externally used socket index to the internal socket representation.
static struct lwip_sock *	tryget_socket (int s)
	Same as get_socket but doesn't set errno.
static int	alloc_socket (struct netconn *newconn, int accepted)
	Allocate a new socket for a given netconn.
static void	free_socket (struct lwip_sock *sock, int is_tcp)
	Free a socket.
int	lwip_listen (int s, int backlog)
	Set a socket into listen mode.
static int	lwip_selscan (int maxfdp1, fd_set readset_in, fd_set writeset_in, fd_set exceptset_in, fd_set readset_out, fd_set writeset_out, fd_set exceptset_out)
	Go through the readset and writeset lists and see which socket of the sockets set in the sets has events.
int	lwip_shutdown (int s, int how)
	Close one end of a full-duplex connection.
int	lwip_fcntl (int s, int cmd, int val)
	A minimal implementation of fcntl.
Variables
static struct lwip_sock	sockets [NUM_SOCKETS]
	The global array of available sockets.
static struct lwip_select_cb *	select_cb_list
	The global list of tasks waiting for select.
static volatile int	select_cb_ctr
	This counter is increased from lwip_select when the list is changed and checked in event_callback to see if it has changed.

Detailed Description

Sockets BSD-Like API module.

Definition in file lwip_sockets.c.

Function Documentation

static int alloc_socket	(	struct netconn *	newconn,
		int	accepted
	)		`[static]`

Allocate a new socket for a given netconn.

Parameters:

newconn	the netconn for which to allocate a socket
accepted	1 if socket has been created by accept(), 0 if socket has been created by socket()

Returns:: the index of the new socket; -1 on error

Definition at line 401 of file lwip_sockets.c.

static void event_callback	(	struct netconn *	conn,
		enum netconn_evt	evt,
		u16_t	len
	)		`[static]`

Callback registered in the netconn layer for each socket-netconn.

Processes recvevent (data available) and wakes up tasks waiting for select.

Definition at line 1571 of file lwip_sockets.c.

static void free_socket	(	struct lwip_sock *	sock,
		int	is_tcp
	)		`[static]`

Free a socket.

The socket's netconn must have been delete before!

Parameters:

sock	the socket to free
is_tcp	!= 0 for TCP sockets, used to free lastdata

Definition at line 437 of file lwip_sockets.c.

static struct lwip_sock* get_socket ( int s ) [static, read]

Map a externally used socket index to the internal socket representation.

Parameters:

s	externally used socket index

Returns:: struct lwip_sock for the socket or NULL if not found

Definition at line 350 of file lwip_sockets.c.

int lwip_fcntl	(	int	s,
		int	cmd,
		int	val
	)

A minimal implementation of fcntl.

Currently only the commands F_GETFL and F_SETFL are implemented. Only the flag O_NONBLOCK is implemented.

Definition at line 2712 of file lwip_sockets.c.

static void lwip_getsockopt_callback ( void * arg ) [static]

lwip_getsockopt_callback: only used without CORE_LOCKING to get into the tcpip_thread

Definition at line 1865 of file lwip_sockets.c.

static u8_t lwip_getsockopt_impl	(	int	s,
		int	level,
		int	optname,
		void *	optval,
		socklen_t *	optlen
	)		`[static]`

lwip_getsockopt_impl: the actual implementation of getsockopt: same argument as lwip_getsockopt, either called directly or through callback

Definition at line 1887 of file lwip_sockets.c.

int lwip_listen	(	int	s,
		int	backlog
	)

Set a socket into listen mode.

The socket may not have been used for another connection previously.

Parameters:

s	the socket to set to listening mode
backlog	(ATTENTION: needs TCP_LISTEN_BACKLOG=1)

Returns:: 0 on success, non-zero on failure

Definition at line 709 of file lwip_sockets.c.

static int lwip_selscan	(	int	maxfdp1,
		fd_set *	readset_in,
		fd_set *	writeset_in,
		fd_set *	exceptset_in,
		fd_set *	readset_out,
		fd_set *	writeset_out,
		fd_set *	exceptset_out
	)		`[static]`

Go through the readset and writeset lists and see which socket of the sockets set in the sets has events.

On return, readset, writeset and exceptset have the sockets enabled that had events.

Parameters:

maxfdp1	the highest socket index in the sets
readset_in	set of sockets to check for read events
writeset_in	set of sockets to check for write events
exceptset_in	set of sockets to check for error events
readset_out	set of sockets that had read events
writeset_out	set of sockets that had write events
exceptset_out	set os sockets that had error events

Returns:: number of sockets that had events (read/write/exception) (>= 0)

Definition at line 1306 of file lwip_sockets.c.

static void lwip_setsockopt_callback ( void * arg ) [static]

lwip_setsockopt_callback: only used without CORE_LOCKING to get into the tcpip_thread

Definition at line 2266 of file lwip_sockets.c.

static u8_t lwip_setsockopt_impl	(	int	s,
		int	level,
		int	optname,
		const void *	optval,
		socklen_t	optlen
	)		`[static]`

lwip_setsockopt_impl: the actual implementation of setsockopt: same argument as lwip_setsockopt, either called directly or through callback

Definition at line 2288 of file lwip_sockets.c.

int lwip_shutdown	(	int	s,
		int	how
	)

Close one end of a full-duplex connection.

Definition at line 1691 of file lwip_sockets.c.

static void lwip_socket_drop_registered_memberships ( int s ) [static]

Drop all memberships of a socket that were not dropped explicitly via setsockopt.

ATTENTION: this function is NOT called from tcpip_thread (or under CORE_LOCK).

Definition at line 2804 of file lwip_sockets.c.

static int lwip_socket_register_membership	(	int	s,
		const ip4_addr_t *	if_addr,
		const ip4_addr_t *	multi_addr
	)		`[static]`

Register a new IGMP membership.

On socket close, the membership is dropped automatically.

ATTENTION: this function is called from tcpip_thread (or under CORE_LOCK).

Returns:: 1 on success, 0 on failure

Definition at line 2752 of file lwip_sockets.c.

void lwip_socket_thread_cleanup ( void )

LWIP_NETCONN_SEM_PER_THREAD==1: destroy thread-local semaphore.

Definition at line 338 of file lwip_sockets.c.

void lwip_socket_thread_init ( void )

LWIP_NETCONN_SEM_PER_THREAD==1: initialize thread-local semaphore.

Definition at line 331 of file lwip_sockets.c.

static void lwip_socket_unregister_membership	(	int	s,
		const ip4_addr_t *	if_addr,
		const ip4_addr_t *	multi_addr
	)		`[static]`

Unregister a previously registered membership.

This prevents dropping the membership on socket close.

ATTENTION: this function is called from tcpip_thread (or under CORE_LOCK).

Definition at line 2778 of file lwip_sockets.c.

static struct lwip_sock* tryget_socket ( int s ) [static, read]

Same as get_socket but doesn't set errno.

Parameters:

s	externally used socket index

Returns:: struct lwip_sock for the socket or NULL if not found

Definition at line 380 of file lwip_sockets.c.

Variable Documentation

volatile int select_cb_ctr [static]

This counter is increased from lwip_select when the list is changed and checked in event_callback to see if it has changed.

Definition at line 290 of file lwip_sockets.c.

struct lwip_select_cb* select_cb_list [static]

The global list of tasks waiting for select.

Definition at line 287 of file lwip_sockets.c.

struct lwip_sock sockets[NUM_SOCKETS] [static]

The global array of available sockets.

Definition at line 285 of file lwip_sockets.c.

Type:	Program
Mbed OS support:	Mbed OS
Created:	23 Feb 2019
Imports:	43
Forks:	0
Commits:	1
Dependents:	0
Dependencies:	0
Followers:	1

lwip_sockets.c File Reference

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Function Documentation

Variable Documentation

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lwip_sockets.c File Reference

Functions

Variables

Detailed Description

Function Documentation

Variable Documentation

Repository toolbox

Repository details

Important Information for this Arm website

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