nsapi_stack_api structure More...

#include <nsapi_types.h>

Data Fields
nsapi_addr_t(*	get_ip_address )(nsapi_stack_t *stack)
	Get the local IP address. More...

nsapi_error_t(*	gethostbyname )(nsapi_stack_t stack, const char host, nsapi_addr_t *addr, nsapi_version_t version)
	Translates a hostname to an IP address. More...

nsapi_error_t(*	add_dns_server )(nsapi_stack_t *stack, nsapi_addr_t addr)
	Add a domain name server to list of servers to query. More...

nsapi_error_t(*	setstackopt )(nsapi_stack_t stack, int level, int optname, const void optval, unsigned optlen)
	Set stack-specific stack options. More...

nsapi_error_t(*	getstackopt )(nsapi_stack_t stack, int level, int optname, void optval, unsigned *optlen)
	Get stack-specific stack options. More...

nsapi_error_t(*	socket_open )(nsapi_stack_t stack, nsapi_socket_t socket, nsapi_protocol_t proto)
	Opens a socket. More...

nsapi_error_t(*	socket_close )(nsapi_stack_t *stack, nsapi_socket_t socket)
	Close the socket. More...

nsapi_error_t(*	socket_bind )(nsapi_stack_t *stack, nsapi_socket_t socket, nsapi_addr_t addr, uint16_t port)
	Bind a specific address to a socket. More...

nsapi_error_t(*	socket_listen )(nsapi_stack_t *stack, nsapi_socket_t socket, int backlog)
	Listen for connections on a TCP socket. More...

nsapi_error_t(*	socket_connect )(nsapi_stack_t *stack, nsapi_socket_t socket, nsapi_addr_t addr, uint16_t port)
	Connects TCP socket to a remote host. More...

nsapi_error_t(*	socket_accept )(nsapi_stack_t stack, nsapi_socket_t server, nsapi_socket_t socket, nsapi_addr_t addr, uint16_t port)
	Accepts a connection on a TCP socket. More...

nsapi_size_or_error_t(*	socket_send )(nsapi_stack_t stack, nsapi_socket_t socket, const void data, nsapi_size_t size)
	Send data over a TCP socket. More...

nsapi_size_or_error_t(*	socket_recv )(nsapi_stack_t stack, nsapi_socket_t socket, void data, nsapi_size_t size)
	Receive data over a TCP socket. More...

nsapi_size_or_error_t(*	socket_sendto )(nsapi_stack_t stack, nsapi_socket_t socket, nsapi_addr_t addr, uint16_t port, const void data, nsapi_size_t size)
	Send a packet over a UDP socket. More...

nsapi_size_or_error_t(*	socket_recvfrom )(nsapi_stack_t stack, nsapi_socket_t socket, nsapi_addr_t addr, uint16_t port, void buffer, nsapi_size_t size)
	Receive a packet over a UDP socket. More...

void(*	socket_attach )(nsapi_stack_t stack, nsapi_socket_t socket, void(callback)(void ), void data)
	Register a callback on state change of the socket. More...

nsapi_error_t(*	setsockopt )(nsapi_stack_t stack, nsapi_socket_t socket, int level, int optname, const void optval, unsigned optlen)
	Set stack-specific socket options. More...

nsapi_error_t(*	getsockopt )(nsapi_stack_t stack, nsapi_socket_t socket, int level, int optname, void optval, unsigned *optlen)
	Get stack-specific socket options. More...

Detailed Description

nsapi_stack_api structure

Common api structure for network stack operations. A network stack can provide a nsapi_stack_api structure filled out with the appropriate implementation.

Unsupported operations can be left as null pointers.

Definition at line 452 of file nsapi_types.h.

Field Documentation

◆ get_ip_address

nsapi_addr_t(* get_ip_address) (nsapi_stack_t *stack)

Get the local IP address.

stack : Stack handle

Returns: Local IP Address or null address if not connected

Definition at line 459 of file nsapi_types.h.

◆ gethostbyname

nsapi_error_t(* gethostbyname) (nsapi_stack_t *stack, const char *host, nsapi_addr_t *addr, nsapi_version_t version)

Translates a hostname to an IP address.

The hostname may be either a domain name or an IP address. If the hostname is an IP address, no network transactions will be performed.

If no stack-specific DNS resolution is provided, the hostname will be resolve using a UDP socket on the stack.

stack : Stack handle
addr : Destination for the host IP address
host : Hostname to resolve
version : Address family

Returns: 0 on success, negative error code on failure

Definition at line 476 of file nsapi_types.h.

◆ add_dns_server

nsapi_error_t(* add_dns_server) (nsapi_stack_t *stack, nsapi_addr_t addr)

Add a domain name server to list of servers to query.

addr : Destination for the host address

Returns: 0 on success, negative error code on failure

Definition at line 484 of file nsapi_types.h.

◆ setstackopt

nsapi_error_t(* setstackopt) (nsapi_stack_t *stack, int level, int optname, const void *optval, unsigned optlen)

Set stack-specific stack options.

The setstackopt allow an application to pass stack-specific hints to the underlying stack. For unsupported options, NSAPI_ERROR_UNSUPPORTED is returned and the stack is unmodified.

stack : Stack handle
level : Stack-specific protocol level
optname : Stack-specific option identifier
optval : Option value
optlen : Length of the option value

Returns: 0 on success, negative error code on failure

Definition at line 500 of file nsapi_types.h.

◆ getstackopt

nsapi_error_t(* getstackopt) (nsapi_stack_t *stack, int level, int optname, void *optval, unsigned *optlen)

Get stack-specific stack options.

The getstackopt allow an application to retrieve stack-specific hints from the underlying stack. For unsupported options, NSAPI_ERROR_UNSUPPORTED is returned and optval is unmodified.

stack : Stack handle
level : Stack-specific protocol level
optname : Stack-specific option identifier
optval : Destination for option value
optlen : Length of the option value

Returns: 0 on success, negative error code on failure

Definition at line 517 of file nsapi_types.h.

◆ socket_open

nsapi_error_t(* socket_open) (nsapi_stack_t *stack, nsapi_socket_t *socket, nsapi_protocol_t proto)

Opens a socket.

Creates a network socket and stores it in the specified handle. The handle must be passed to following calls on the socket.

A stack may have a finite number of sockets, in this case NSAPI_ERROR_NO_SOCKET is returned if no socket is available.

stack : Stack context
socket : Destination for the handle to a newly created socket
proto : Protocol of socket to open, NSAPI_TCP or NSAPI_UDP

Returns: 0 on success, negative error code on failure

Definition at line 534 of file nsapi_types.h.

◆ socket_close

nsapi_error_t(* socket_close) (nsapi_stack_t *stack, nsapi_socket_t socket)

Close the socket.

Closes any open connection and deallocates any memory associated with the socket.

stack : Stack handle
socket : Socket handle

Returns: 0 on success, negative error code on failure

Definition at line 547 of file nsapi_types.h.

◆ socket_bind

nsapi_error_t(* socket_bind) (nsapi_stack_t *stack, nsapi_socket_t socket, nsapi_addr_t addr, uint16_t port)

Bind a specific address to a socket.

Binding a socket specifies the address and port on which to receive data. If the IP address is zeroed, only the port is bound.

stack : Stack handle
socket : Socket handle
addr : Local address to bind, may be null
port : Local port to bind

Returns: 0 on success, negative error code on failure.

Definition at line 561 of file nsapi_types.h.

◆ socket_listen

nsapi_error_t(* socket_listen) (nsapi_stack_t *stack, nsapi_socket_t socket, int backlog)

Listen for connections on a TCP socket.

Marks the socket as a passive socket that can be used to accept incoming connections.

stack : Stack handle
socket : Socket handle
backlog : Number of pending connections that can be queued simultaneously

Returns: 0 on success, negative error code on failure

Definition at line 575 of file nsapi_types.h.

◆ socket_connect

nsapi_error_t(* socket_connect) (nsapi_stack_t *stack, nsapi_socket_t socket, nsapi_addr_t addr, uint16_t port)

Connects TCP socket to a remote host.

Initiates a connection to a remote server specified by the indicated address.

stack : Stack handle
socket : Socket handle
addr : The address of the remote host
port : The port of the remote host

Returns: 0 on success, negative error code on failure

Definition at line 589 of file nsapi_types.h.

◆ socket_accept

nsapi_error_t(* socket_accept) (nsapi_stack_t *stack, nsapi_socket_t server, nsapi_socket_t *socket, nsapi_addr_t *addr, uint16_t *port)

Accepts a connection on a TCP socket.

The server socket must be bound and set to listen for connections. On a new connection, creates a network socket and stores it in the specified handle. The handle must be passed to following calls on the socket.

A stack may have a finite number of sockets, in this case NSAPI_ERROR_NO_SOCKET is returned if no socket is available.

This call is non-blocking. If accept would block, NSAPI_ERROR_WOULD_BLOCK is returned immediately.

stack : Stack handle
server : Socket handle to server to accept from
socket : Destination for a handle to the newly created socket
addr : Destination for the address of the remote host
port : Destination for the port of the remote host

Returns: 0 on success, negative error code on failure

Definition at line 613 of file nsapi_types.h.

◆ socket_send

nsapi_size_or_error_t(* socket_send) (nsapi_stack_t *stack, nsapi_socket_t socket, const void *data, nsapi_size_t size)

Send data over a TCP socket.

The socket must be connected to a remote host. Returns the number of bytes sent from the buffer.

This call is non-blocking. If send would block, NSAPI_ERROR_WOULD_BLOCK is returned immediately.

stack : Stack handle
socket : Socket handle
data : Buffer of data to send to the host
size : Size of the buffer in bytes

Returns: Number of sent bytes on success, negative error code on failure

Definition at line 631 of file nsapi_types.h.

◆ socket_recv

nsapi_size_or_error_t(* socket_recv) (nsapi_stack_t *stack, nsapi_socket_t socket, void *data, nsapi_size_t size)

Receive data over a TCP socket.

The socket must be connected to a remote host. Returns the number of bytes received into the buffer.

This call is non-blocking. If recv would block, NSAPI_ERROR_WOULD_BLOCK is returned immediately.

stack : Stack handle
socket : Socket handle
data : Destination buffer for data received from the host
size : Size of the buffer in bytes

Returns: Number of received bytes on success, negative error code on failure

Definition at line 649 of file nsapi_types.h.

◆ socket_sendto

nsapi_size_or_error_t(* socket_sendto) (nsapi_stack_t *stack, nsapi_socket_t socket, nsapi_addr_t addr, uint16_t port, const void *data, nsapi_size_t size)

Send a packet over a UDP socket.

Sends data to the specified address. Returns the number of bytes sent from the buffer.

This call is non-blocking. If sendto would block, NSAPI_ERROR_WOULD_BLOCK is returned immediately.

stack : Stack handle
socket : Socket handle
addr : The address of the remote host
port : The port of the remote host
data : Buffer of data to send to the host
size : Size of the buffer in bytes

Returns: Number of sent bytes on success, negative error code on failure

Definition at line 669 of file nsapi_types.h.

◆ socket_recvfrom

nsapi_size_or_error_t(* socket_recvfrom) (nsapi_stack_t *stack, nsapi_socket_t socket, nsapi_addr_t *addr, uint16_t *port, void *buffer, nsapi_size_t size)

Receive a packet over a UDP socket.

Receives data and stores the source address in address if address is not NULL. Returns the number of bytes received into the buffer.

This call is non-blocking. If recvfrom would block, NSAPI_ERROR_WOULD_BLOCK is returned immediately.

stack : Stack handle
socket : Socket handle
addr : Destination for the address of the remote host
port : Destination for the port of the remote host
data : Destination buffer for data received from the host
size : Size of the buffer in bytes

Returns: Number of received bytes on success, negative error code on failure

Definition at line 689 of file nsapi_types.h.

◆ socket_attach

void(* socket_attach) (nsapi_stack_t *stack, nsapi_socket_t socket, void(*callback)(void *), void *data)

Register a callback on state change of the socket.

The specified callback will be called on state changes such as when the socket can recv/send/accept successfully and on when an error occurs. The callback may also be called spuriously without reason.

The callback may be called in an interrupt context and should not perform expensive operations such as recv/send calls.

stack : Stack handle
socket : Socket handle
callback : Function to call on state change
data : Argument to pass to callback

Definition at line 717 of file nsapi_types.h.

◆ setsockopt

nsapi_error_t(* setsockopt) (nsapi_stack_t *stack, nsapi_socket_t socket, int level, int optname, const void *optval, unsigned optlen)

Set stack-specific socket options.

The setsockopt allow an application to pass stack-specific hints to the underlying stack. For unsupported options, NSAPI_ERROR_UNSUPPORTED is returned and the socket is unmodified.

stack : Stack handle
socket : Socket handle
level : Stack-specific protocol level
optname : Stack-specific option identifier
optval : Option value
optlen : Length of the option value

Returns: 0 on success, negative error code on failure

Definition at line 735 of file nsapi_types.h.

◆ getsockopt

nsapi_error_t(* getsockopt) (nsapi_stack_t *stack, nsapi_socket_t socket, int level, int optname, void *optval, unsigned *optlen)

Get stack-specific socket options.