mbed OS API for onboard IP stack abstraction More...

#include <OnboardNetworkStack.h>

Inherits NetworkStack.

Inherited by EmacTestNetworkStack, LWIP, and Nanostack.

Data Structures
class	Interface
	Representation of a stack's view of an interface. More...
Public Types
typedef mbed::Callback< void(nsapi_error_t result, SocketAddress *address)	hostbyname_cb_t )
	Hostname translation callback (asynchronous)
Public Member Functions
virtual nsapi_error_t	add_ethernet_interface (EMAC &emac, bool default_if, Interface **interface_out)=0
	Register a network interface with the IP stack.
virtual const char *	get_ip_address ()
	Get the local IP address.
virtual nsapi_error_t	gethostbyname (const char host, SocketAddress address, nsapi_version_t version=NSAPI_UNSPEC)
	Translates a hostname to an IP address with specific version.
virtual nsapi_value_or_error_t	gethostbyname_async (const char *host, hostbyname_cb_t callback, nsapi_version_t version=NSAPI_UNSPEC)
	Translates a hostname to an IP address (asynchronous)
virtual nsapi_error_t	gethostbyname_async_cancel (int id)
	Cancels asynchronous hostname translation.
virtual nsapi_error_t	add_dns_server (const SocketAddress &address)
	Add a domain name server to list of servers to query.
virtual nsapi_error_t	get_dns_server (int index, SocketAddress *address)
	Get a domain name server from a list of servers to query.
virtual OnboardNetworkStack *	onboardNetworkStack ()
	Dynamic downcast to a OnboardNetworkStack.
Static Public Member Functions
static OnboardNetworkStack &	get_default_instance ()
	Return the default on-board network stack.
Protected Member Functions
virtual nsapi_error_t	socket_open (nsapi_socket_t *handle, nsapi_protocol_t proto)=0
	Opens a socket.
virtual nsapi_error_t	socket_close (nsapi_socket_t handle)=0
	Close the socket.
virtual nsapi_error_t	socket_bind (nsapi_socket_t handle, const SocketAddress &address)=0
	Bind a specific address to a socket.
virtual nsapi_error_t	socket_listen (nsapi_socket_t handle, int backlog)=0
	Listen for connections on a TCP socket.
virtual nsapi_error_t	socket_connect (nsapi_socket_t handle, const SocketAddress &address)=0
	Connects TCP socket to a remote host.
virtual nsapi_error_t	socket_accept (nsapi_socket_t server, nsapi_socket_t handle, SocketAddress address=0)=0
	Accepts a connection on a TCP socket.
virtual nsapi_size_or_error_t	socket_send (nsapi_socket_t handle, const void *data, nsapi_size_t size)=0
	Send data over a TCP socket.
virtual nsapi_size_or_error_t	socket_recv (nsapi_socket_t handle, void *data, nsapi_size_t size)=0
	Receive data over a TCP socket.
virtual nsapi_size_or_error_t	socket_sendto (nsapi_socket_t handle, const SocketAddress &address, const void *data, nsapi_size_t size)=0
	Send a packet over a UDP socket.
virtual nsapi_size_or_error_t	socket_recvfrom (nsapi_socket_t handle, SocketAddress address, void buffer, nsapi_size_t size)=0
	Receive a packet over a UDP socket.
virtual void	socket_attach (nsapi_socket_t handle, void(callback)(void ), void *data)=0
	Register a callback on state change of the socket.
Friends
class	InternetSocket
class	UDPSocket
class	TCPSocket

Detailed Description

mbed OS API for onboard IP stack abstraction

This interface should be used by targets to initialize IP stack, create, bring up and bring down network interfaces.

An onboard network stack has the potential ability to register interfaces such as through EMAC, and has its own interface identifiers.

Definition at line 33 of file OnboardNetworkStack.h.

Member Typedef Documentation

typedef mbed::Callback<void (nsapi_error_t result, SocketAddress *address) hostbyname_cb_t) [inherited]

Hostname translation callback (asynchronous)

Callback will be called after DNS resolution completes or a failure occurs.

Callback should not take more than 10ms to execute, otherwise it might prevent underlying thread processing. A portable user of the callback should not make calls to network operations due to stack size limitations. The callback should not perform expensive operations such as socket recv/send calls or blocking operations.

Parameters:

status	0 on success, negative error code on failure
address	On success, destination for the host SocketAddress

Definition at line 78 of file NetworkStack.h.

Member Function Documentation

nsapi_error_t add_dns_server ( const SocketAddress & address ) [virtual, inherited]

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

Parameters:

address Destination for the host address

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

Definition at line 93 of file NetworkStack.cpp.

virtual nsapi_error_t add_ethernet_interface	(	EMAC &	emac,
		bool	default_if,
		Interface **	interface_out
	)		`[pure virtual]`

Register a network interface with the IP stack.

Connects EMAC layer with the IP stack and initializes all the required infrastructure. This function should be called only once for each available interface. EMAC memory manager is available to EMAC after this function call.

Parameters:

	emac	EMAC HAL implementation for this network interface
	default_if	true if the interface should be treated as the default one
[out]	interface_out	pointer to stack interface object controlling the EMAC

Returns:: NSAPI_ERROR_OK on success, or error code

OnboardNetworkStack & get_default_instance ( ) [static]

Return the default on-board network stack.

Returns the default on-board network stack, as configured by JSON option nsapi.default-stack.

Definition at line 675 of file LWIPStack.cpp.

nsapi_error_t get_dns_server	(	int	index,
		SocketAddress *	address
	)		`[virtual, inherited]`

Get a domain name server from a list of servers to query.

Returns a DNS server address for a index. If returns error no more DNS servers to read.

Parameters:

index	Index of the DNS server, starts from zero
address	Destination for the host address

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

Definition at line 98 of file NetworkStack.cpp.

const char * get_ip_address ( ) [virtual, inherited]

Get the local IP address.

Returns:: Null-terminated representation of the local IP address or null if not yet connected

Definition at line 24 of file NetworkStack.cpp.

nsapi_error_t gethostbyname	(	const char *	host,
		SocketAddress *	address,
		nsapi_version_t	version = `NSAPI_UNSPEC`
	)		`[virtual, inherited]`

Translates a hostname to an IP address with specific version.

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.

Parameters:

host	Hostname to resolve
address	Destination for the host SocketAddress
version	IP version of address to resolve, NSAPI_UNSPEC indicates version is chosen by the stack (defaults to NSAPI_UNSPEC)

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

Definition at line 29 of file NetworkStack.cpp.

nsapi_value_or_error_t gethostbyname_async	(	const char *	host,
		hostbyname_cb_t	callback,
		nsapi_version_t	version = `NSAPI_UNSPEC`
	)		`[virtual, inherited]`

Translates a hostname to an IP address (asynchronous)

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.

Call is non-blocking. Result of the DNS operation is returned by the callback. If this function returns failure, callback will not be called. In case result is success (IP address was found from DNS cache), callback will be called before function returns.

Parameters:

host	Hostname to resolve
callback	Callback that is called for result
version	IP version of address to resolve, NSAPI_UNSPEC indicates version is chosen by the stack (defaults to NSAPI_UNSPEC)

Returns:: 0 on immediate success, negative error code on immediate failure or a positive unique id that represents the hostname translation operation and can be passed to cancel

Definition at line 56 of file NetworkStack.cpp.

nsapi_error_t gethostbyname_async_cancel ( int id ) [virtual, inherited]

Cancels asynchronous hostname translation.

When translation is cancelled, callback will not be called.

Parameters:

id	Unique id of the hostname translation operation

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

Definition at line 88 of file NetworkStack.cpp.

virtual OnboardNetworkStack* onboardNetworkStack ( ) [virtual, inherited]

Dynamic downcast to a OnboardNetworkStack.

Definition at line 164 of file NetworkStack.h.

virtual nsapi_error_t socket_accept	(	nsapi_socket_t	server,
		nsapi_socket_t *	handle,
		SocketAddress *	address = `0`
	)		`[protected, pure virtual, inherited]`

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.

Parameters:

server	Socket handle to server to accept from
handle	Destination for a handle to the newly created socket
address	Destination for the remote address or NULL

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

virtual void socket_attach	(	nsapi_socket_t	handle,
		void()(void )	callback,
		void *	data
	)		`[protected, pure virtual, inherited]`

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.

Parameters:

handle	Socket handle
callback	Function to call on state change
data	Argument to pass to callback

virtual nsapi_error_t socket_bind	(	nsapi_socket_t	handle,
		const SocketAddress &	address
	)		`[protected, pure virtual, inherited]`

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.

Parameters:

handle	Socket handle
address	Local address to bind

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

virtual nsapi_error_t socket_close ( nsapi_socket_t handle ) [protected, pure virtual, inherited]

Close the socket.

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

Parameters:

handle Socket handle

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

virtual nsapi_error_t socket_connect	(	nsapi_socket_t	handle,
		const SocketAddress &	address
	)		`[protected, pure virtual, inherited]`

Connects TCP socket to a remote host.

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

Parameters:

handle	Socket handle
address	The SocketAddress of the remote host

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

virtual nsapi_error_t socket_listen	(	nsapi_socket_t	handle,
		int	backlog
	)		`[protected, pure virtual, inherited]`

Listen for connections on a TCP socket.

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

Parameters:

handle	Socket handle
backlog	Number of pending connections that can be queued simultaneously

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

virtual nsapi_error_t socket_open	(	nsapi_socket_t *	handle,
		nsapi_protocol_t	proto
	)		`[protected, pure virtual, inherited]`

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.

Parameters:

handle	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

virtual nsapi_size_or_error_t socket_recv	(	nsapi_socket_t	handle,
		void *	data,
		nsapi_size_t	size
	)		`[protected, pure virtual, inherited]`

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.

Parameters:

handle	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

virtual nsapi_size_or_error_t socket_recvfrom	(	nsapi_socket_t	handle,
		SocketAddress *	address,
		void *	buffer,
		nsapi_size_t	size
	)		`[protected, pure virtual, inherited]`

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.

Parameters:

handle	Socket handle
address	Destination for the source address or NULL
buffer	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

virtual nsapi_size_or_error_t socket_send	(	nsapi_socket_t	handle,
		const void *	data,
		nsapi_size_t	size
	)		`[protected, pure virtual, inherited]`

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.

Parameters:

handle	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

virtual nsapi_size_or_error_t socket_sendto	(	nsapi_socket_t	handle,
		const SocketAddress &	address,
		const void *	data,
		nsapi_size_t	size
	)		`[protected, pure virtual, inherited]`

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.

Parameters:

handle	Socket handle
address	The SocketAddress 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

Type:	Program
Mbed OS support:	Mbed OS
Created:	11 Oct 2018
Imports:	23
Forks:	0
Commits:	4
Dependents:	0
Dependencies:	1
Followers:	1

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