BSD socket API. More...

Functions
int_t	socketTranslateErrorCode (error_t error)
	Translate error code.
int_t	socket (int_t family, int_t type, int_t protocol)
	Create a socket that is bound to a specific transport service provider.
int_t	bind (int_t s, const sockaddr *addr, socklen_t addrlen)
	Associate a local address with a socket.
int_t	connect (int_t s, const sockaddr *addr, socklen_t addrlen)
	Establish a connection to a specified socket.
int_t	listen (int_t s, int_t backlog)
	Place a socket in the listening state.
int_t	accept (int_t s, sockaddr addr, socklen_t addrlen)
	Permit an incoming connection attempt on a socket.
int_t	send (int_t s, const void *data, size_t length, int_t flags)
	Send data to a connected socket.
int_t	sendto (int_t s, const void data, size_t length, int_t flags, const sockaddr addr, socklen_t addrlen)
	Send a datagram to a specific destination.
int_t	recv (int_t s, void *data, size_t size, int_t flags)
	Receive data from a connected socket.
int_t	recvfrom (int_t s, void data, size_t size, int_t flags, sockaddr addr, socklen_t *addrlen)
	Receive a datagram.
int_t	getsockname (int_t s, sockaddr addr, socklen_t addrlen)
	Retrieves the local name for a socket.
int_t	getpeername (int_t s, sockaddr addr, socklen_t addrlen)
	Retrieves the address of the peer to which a socket is connected.
int_t	setsockopt (int_t s, int_t level, int_t optname, const void *optval, socklen_t optlen)
	The setsockopt function sets a socket option.
int_t	getsockopt (int_t s, int_t level, int_t optname, void optval, socklen_t optlen)
	The getsockopt function retrieves a socket option.
int_t	ioctlsocket (int_t s, uint32_t cmd, void *arg)
	Control the I/O mode of a socket.
int_t	fcntl (int_t s, int_t cmd, void *arg)
	Perform specific operation.
int_t	shutdown (int_t s, int_t how)
	The shutdown function disables sends or receives on a socket.
int_t	closesocket (int_t s)
	The closesocket function closes an existing socket.
int_t	select (int_t nfds, fd_set readfds, fd_set writefds, fd_set exceptfds, const timeval timeout)
	Determine the status of one or more sockets.
void	selectFdZero (fd_set *fds)
	Initializes a descriptor set.
void	selectFdSet (fd_set *fds, int_t s)
	Add a descriptor to an existing set.
void	selectFdClr (fd_set *fds, int_t s)
	Remove a descriptor from an existing set.
int_t	selectFdIsSet (fd_set *fds, int_t s)
	Check whether a descriptor is set.
int_t	gethostbyname (const char_t name, hostent info)
	Retrieve host address corresponding to a host name.
in_addr_t	inet_addr (const char_t *cp)
	Convert a dot-decimal string into binary data in network byte order.
int_t	inet_aton (const char_t cp, in_addr inp)
	Convert a dot-decimal string into binary form.
const char_t *	inet_ntoa (in_addr in, char_t *cp)
	Convert a binary IPv4 address to dot-decimal notation.
int_t	inet_pton (int_t af, const char_t src, void dst)
	Convert an IPv4 or IPv6 address from text to binary form.
const char_t *	inet_ntop (int_t af, const void src, char_t dst, socklen_t size)
	Convert an IPv4 or IPv6 address from binary to text.

Detailed Description

BSD socket API.

License

This file is part of CycloneTCP Open.

This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.

Author:: Oryx Embedded SARL (www.oryx-embedded.com)

Version:: 1.7.6

Definition in file bsd_socket.c.

Function Documentation

int_t accept	(	int_t	s,
		sockaddr *	addr,
		socklen_t *	addrlen
	)

Permit an incoming connection attempt on a socket.

Parameters:

[in]	s	Descriptor that identifies a socket in the listening state
[out]	addr	Address of the connecting entity (optional)
[in,out]	addrlen	Length in bytes of the address (optional)

Returns:: If no error occurs, accept returns a descriptor for the new socket. Otherwise, it returns SOCKET_ERROR

Definition at line 389 of file bsd_socket.c.

int_t bind	(	int_t	s,
		const sockaddr *	addr,
		socklen_t	addrlen
	)

Associate a local address with a socket.

Parameters:

[in]	s	Descriptor identifying an unbound socket
[in]	addr	Local address to assign to the bound socket
[in]	addrlen	Length in bytes of the address

Returns:: If no error occurs, bind returns SOCKET_SUCCESS. Otherwise, it returns SOCKET_ERROR

Definition at line 148 of file bsd_socket.c.

int_t closesocket ( int_t s )

The closesocket function closes an existing socket.

Parameters:

[in] s Descriptor that identifies a socket

Returns:: If no error occurs, closesocket returns SOCKET_SUCCESS Otherwise, it returns SOCKET_ERROR

Definition at line 1490 of file bsd_socket.c.

int_t connect	(	int_t	s,
		const sockaddr *	addr,
		socklen_t	addrlen
	)

Establish a connection to a specified socket.

Parameters:

[in]	s	Descriptor identifying an unconnected socket
[in]	addr	Address to which the connection should be established
[in]	addrlen	Length in bytes of the address

Returns:: If no error occurs, connect returns SOCKET_SUCCESS. Otherwise, it returns SOCKET_ERROR

Definition at line 249 of file bsd_socket.c.

int_t fcntl	(	int_t	s,
		int_t	cmd,
		void *	arg
	)

Perform specific operation.

Parameters:

[in]	s	Descriptor that identifies a socket
[in]	cmd	A command to perform on the socket
[in,out]	arg	A pointer to a parameter

Returns:: If no error occurs, setsockopt returns SOCKET_SUCCESS Otherwise, it returns SOCKET_ERROR

Definition at line 1379 of file bsd_socket.c.

int_t gethostbyname	(	const char_t *	name,
		hostent *	info
	)

Retrieve host address corresponding to a host name.

Parameters:

[in]	name	Name of the host to resolve
[out]	info	Address of the specified host

Returns:: If no error occurs, gethostbyname returns 0. Otherwise it returns an appropriate error code

Definition at line 1797 of file bsd_socket.c.

int_t getpeername	(	int_t	s,
		sockaddr *	addr,
		socklen_t *	addrlen
	)

Retrieves the address of the peer to which a socket is connected.

Parameters:

[in]	s	Descriptor identifying a socket
[out]	addr	Address of the peer
[in,out]	addrlen	Length in bytes of the address

Returns:: If no error occurs, getpeername returns SOCKET_SUCCESS Otherwise, it returns SOCKET_ERROR

Definition at line 881 of file bsd_socket.c.

int_t getsockname	(	int_t	s,
		sockaddr *	addr,
		socklen_t *	addrlen
	)

Retrieves the local name for a socket.

Parameters:

[in]	s	Descriptor identifying a socket
[out]	addr	Address of the socket
[in,out]	addrlen	Length in bytes of the address

Returns:: If no error occurs, getsockname returns SOCKET_SUCCESS Otherwise, it returns SOCKET_ERROR

Definition at line 789 of file bsd_socket.c.

int_t getsockopt	(	int_t	s,
		int_t	level,
		int_t	optname,
		void *	optval,
		socklen_t *	optlen
	)

The getsockopt function retrieves a socket option.

Parameters:

[in]	s	Descriptor that identifies a socket
[in]	level	The level at which the option is defined
[in]	optname	The socket option for which the value is to be retrieved
[out]	optval	A pointer to the buffer in which the value for the requested option is to be returned
[in,out]	optlen	The size, in bytes, of the buffer pointed to by the optval parameter

Returns:: If no error occurs, getsockopt returns SOCKET_SUCCESS Otherwise, it returns SOCKET_ERROR

Definition at line 1125 of file bsd_socket.c.

in_addr_t inet_addr ( const char_t * cp )

Convert a dot-decimal string into binary data in network byte order.

Parameters:

[in] cp NULL-terminated string representing the IPv4 address

Returns:: Binary data in network byte order

Definition at line 1853 of file bsd_socket.c.

int_t inet_aton	(	const char_t *	cp,
		in_addr *	inp
	)

Convert a dot-decimal string into binary form.

Parameters:

[in]	cp	NULL-terminated string representing the IPv4 address
[out]	inp	Binary data in network byte order

Returns:: The function returns non-zero if the address is valid, zero if not

Definition at line 1887 of file bsd_socket.c.

const char_t* inet_ntoa	(	in_addr	in,
		char_t *	cp
	)

Convert a binary IPv4 address to dot-decimal notation.

Parameters:

[in]	in	Binary representation of the IPv4 address
[out]	cp	Pointer to the buffer where to format the string

Returns:: Pointer to the formatted string

Definition at line 1923 of file bsd_socket.c.

const char_t* inet_ntop	(	int_t	af,
		const void *	src,
		char_t *	dst,
		socklen_t	size
	)

Convert an IPv4 or IPv6 address from binary to text.

Parameters:

[in]	af	Address family
[in]	src	Binary representation of the IP address
[out]	dst	NULL-terminated string representing the IP address
[in]	size	Number of bytes available in the buffer

Returns:: On success, the function returns a pointer to the formatted string. NULL is returned if there was an error

Definition at line 2018 of file bsd_socket.c.

int_t inet_pton	(	int_t	af,
		const char_t *	src,
		void *	dst
	)

Convert an IPv4 or IPv6 address from text to binary form.

Parameters:

[in]	af	Address family
[in]	src	NULL-terminated string representing the IP address
[out]	dst	Binary representation of the IP address

Returns:: The function returns 1 on success. 0 is returned if the address is not valid. If the address family is not valid, -1 is returned

Definition at line 1946 of file bsd_socket.c.

int_t ioctlsocket	(	int_t	s,
		uint32_t	cmd,
		void *	arg
	)

Control the I/O mode of a socket.

Parameters:

[in]	s	Descriptor that identifies a socket
[in]	cmd	A command to perform on the socket
[in,out]	arg	A pointer to a parameter

Returns:: If no error occurs, setsockopt returns SOCKET_SUCCESS Otherwise, it returns SOCKET_ERROR

Definition at line 1302 of file bsd_socket.c.

int_t listen	(	int_t	s,
		int_t	backlog
	)

Place a socket in the listening state.

Place a socket in a state in which it is listening for an incoming connection

Parameters:

[in]	s	Descriptor identifying a bound, unconnected socket
[in]	backlog	Maximum length of the queue of pending connections

Returns:: If no error occurs, listen returns SOCKET_SUCCESS. Otherwise, it returns SOCKET_ERROR

Definition at line 351 of file bsd_socket.c.

int_t recv	(	int_t	s,
		void *	data,
		size_t	size,
		int_t	flags
	)

Receive data from a connected socket.

Parameters:

[in]	s	Descriptor that identifies a connected socket
[out]	data	Buffer where to store the incoming data
[in]	size	Maximum number of bytes that can be received
[in]	flags	Set of flags that influences the behavior of this function

Returns:: If no error occurs, recv returns the number of bytes received. If the connection has been gracefully closed, the return value is zero. Otherwise, a value of SOCKET_ERROR is returned

Definition at line 645 of file bsd_socket.c.

int_t recvfrom	(	int_t	s,
		void *	data,
		size_t	size,
		int_t	flags,
		sockaddr *	addr,
		socklen_t *	addrlen
	)

Receive a datagram.

Parameters:

[in]	s	Descriptor that identifies a socket
[out]	data	Buffer where to store the incoming data
[in]	size	Maximum number of bytes that can be received
[in]	flags	Set of flags that influences the behavior of this function
[out]	addr	Source address upon return (optional)
[in,out]	addrlen	Length in bytes of the address (optional)

Returns:: If no error occurs, recvfrom returns the number of bytes received. If the connection has been gracefully closed, the return value is zero. Otherwise, a value of SOCKET_ERROR is returned

Definition at line 694 of file bsd_socket.c.

int_t select	(	int_t	nfds,
		fd_set *	readfds,
		fd_set *	writefds,
		fd_set *	exceptfds,
		const timeval *	timeout
	)

Determine the status of one or more sockets.

The select function determines the status of one or more sockets, waiting if necessary, to perform synchronous I/O

Parameters:

[in]	nfds	Unused parameter included only for compatibility with Berkeley socket
[in,out]	readfds	An optional pointer to a set of sockets to be checked for readability
[in,out]	writefds	An optional pointer to a set of sockets to be checked for writability
[in,out]	exceptfds	An optional pointer to a set of sockets to be checked for errors
[in]	timeout	The maximum time for select to wait. Set the timeout parameter to null for blocking operations

Returns:: The select function returns the total number of socket handles that are ready and contained in the fd_set structures, zero if the time limit expired, or SOCKET_ERROR if an error occurred

Definition at line 1528 of file bsd_socket.c.

void selectFdClr	(	fd_set *	fds,
		int_t	s
	)

Remove a descriptor from an existing set.

Parameters:

[in]	fds	Pointer to a descriptor set
[in]	s	Descriptor that identifies the socket to remove

Definition at line 1740 of file bsd_socket.c.

int_t selectFdIsSet	(	fd_set *	fds,
		int_t	s
	)

Check whether a descriptor is set.

Parameters:

[in]	fds	Pointer to a descriptor set
[in]	s	Descriptor that identifies the socket to test

Returns:: Nonzero if s is a member of the set. Otherwise, zero

Definition at line 1772 of file bsd_socket.c.

void selectFdSet	(	fd_set *	fds,
		int_t	s
	)

Add a descriptor to an existing set.

Parameters:

[in]	fds	Pointer to a descriptor set
[in]	s	Descriptor that identifies the socket to add

Definition at line 1711 of file bsd_socket.c.

void selectFdZero ( fd_set * fds )

Initializes a descriptor set.

Parameters:

[in] fds Pointer to a descriptor set

Definition at line 1698 of file bsd_socket.c.

int_t send	(	int_t	s,
		const void *	data,
		size_t	length,
		int_t	flags
	)

Send data to a connected socket.

Parameters:

[in]	s	Descriptor that identifies a connected socket
[in]	data	Pointer to a buffer containing the data to be transmitted
[in]	length	Number of bytes to be transmitted
[in]	flags	Set of flags that influences the behavior of this function

Returns:: If no error occurs, send returns the total number of bytes sent, which can be less than the number requested to be sent in the length parameter. Otherwise, a value of SOCKET_ERROR is returned

Definition at line 481 of file bsd_socket.c.

int_t sendto	(	int_t	s,
		const void *	data,
		size_t	length,
		int_t	flags,
		const sockaddr *	addr,
		socklen_t	addrlen
	)

Send a datagram to a specific destination.

Parameters:

[in]	s	Descriptor that identifies a socket
[in]	data	Pointer to a buffer containing the data to be transmitted
[in]	length	Number of bytes to be transmitted
[in]	flags	Set of flags that influences the behavior of this function
[in]	addr	Destination address
[in]	addrlen	Length in bytes of the destination address

Returns:: If no error occurs, sendto returns the total number of bytes sent, which can be less than the number requested to be sent in the length parameter. Otherwise, a value of SOCKET_ERROR is returned

Definition at line 540 of file bsd_socket.c.

int_t setsockopt	(	int_t	s,
		int_t	level,
		int_t	optname,
		const void *	optval,
		socklen_t	optlen
	)

The setsockopt function sets a socket option.

Parameters:

[in]	s	Descriptor that identifies a socket
[in]	level	The level at which the option is defined
[in]	optname	The socket option for which the value is to be set
[in]	optval	A pointer to the buffer in which the value for the requested option is specified
[in]	optlen	The size, in bytes, of the buffer pointed to by the optval parameter

Returns:: If no error occurs, setsockopt returns SOCKET_SUCCESS Otherwise, it returns SOCKET_ERROR

Definition at line 975 of file bsd_socket.c.

int_t shutdown	(	int_t	s,
		int_t	how
	)

The shutdown function disables sends or receives on a socket.

Parameters:

[in]	s	Descriptor that identifies a socket
[in]	how	A flag that describes what types of operation will no longer be allowed

Returns:: If no error occurs, shutdown returns SOCKET_SUCCESS Otherwise, it returns SOCKET_ERROR

Definition at line 1454 of file bsd_socket.c.

int_t socket	(	int_t	family,
		int_t	type,
		int_t	protocol
	)

Create a socket that is bound to a specific transport service provider.

Parameters:

[in]	family	Address family
[in]	type	Type specification for the new socket
[in]	protocol	Protocol to be used

Returns:: On success, a file descriptor for the new socket is returned. On failure, SOCKET_ERROR is returned

Definition at line 106 of file bsd_socket.c.

int_t socketTranslateErrorCode ( error_t error )

Translate error code.

Parameters:

[in] error Error code to be translated

Returns:: BSD error code

Definition at line 56 of file bsd_socket.c.

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