Hostname translation callback (for use with gethostbyname_async()).

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

Note

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

result	NSAPI_ERROR_OK on success, negative error code on failure.
address	On success, destination for the host SocketAddress.

Definition at line 249 of file NetworkInterface.h.

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

Parameters

address

Address for the dns host.

Returns

NSAPI_ERROR_OK on success, negative error code on failure.

Implements DNS.

Add event listener for interface.

This API allows multiple callback to be registered for a single interface. When first called, internal list of event handlers are created and registered to interface through attach() API.

Application may only use attach() or add_event_listener() interface. Mixing usage of both leads to undefined behavior.

Parameters

status_cb

The callback for status changes.

Register callback for status reporting.

The specified status callback function will be called on status changes on the network. The parameters on the callback are the event type and event-type dependent reason parameter. Only one callback can be registered at a time.

To unregister a callback call with status_cb parameter as a zero.

NOTE: Any callbacks registered with this function will be overwritten if add_event_listener() API is used.

Parameters

status_cb

The callback for status changes.

Reimplemented in EMACInterface, CellularContext, InterfaceNanostack, L3IPInterface, PPPInterface, and AT_CellularContext.

Return pointer to a CellularInterface.

Returns

Pointer to requested interface type or NULL if this class doesn't implement the interface.

Deprecated:

CellularBase migrated to CellularInterface - use cellularInterface()

Reimplemented in CellularInterface.

Definition at line 377 of file NetworkInterface.h.

Return pointer to a CellularInterface.

Returns

Pointer to requested interface type or NULL if this class doesn't implement the interface.

Reimplemented in CellularInterface.

Definition at line 454 of file NetworkInterface.h.

Attempt to connect to a Wi-Fi network.

Parameters

ssid	Name of the network to connect to.
pass	Security passphrase to connect to the network.
security	Type of encryption for connection (Default: NSAPI_SECURITY_NONE).
channel	Channel to make the connection, or 0 for any (Default: 0).

Returns

NSAPI_ERROR_OK on success, or error code on failure.

Implemented in RDAWiFiInterface, and WhdSTAInterface.

Attempt to connect to a Wi-Fi network.

Requires ssid and passphrase to be set. If passphrase is invalid, NSAPI_ERROR_AUTH_ERROR is returned.

Returns

NSAPI_ERROR_OK on success, negative error code on failure.

Implements NetworkInterface.

Implemented in RDAWiFiInterface, and WhdSTAInterface.

Stop the interface.

Returns

NSAPI_ERROR_OK on success, or error code on failure.

Implements NetworkInterface.

Implemented in RDAWiFiInterface, and WhdSTAInterface.

Return pointer to an EMACInterface.

Returns

Pointer to requested interface type or NULL if this class doesn't implement the interface.

Reimplemented in EMACInterface.

Definition at line 385 of file NetworkInterface.h.

Return pointer to an EthInterface.

Returns

Pointer to requested interface type or NULL if this class doesn't implement the interface.

Reimplemented in EthInterface.

Definition at line 351 of file NetworkInterface.h.

Get the connection status.

Returns

The connection status (

See also

nsapi_types.h).

Reimplemented in EMACInterface, InterfaceNanostack, L3IPInterface, PPPInterface, and AT_CellularContext.

Get the default Wi-Fi interface.

This is provided as a weak method so applications can override it. Default behavior is to get the target's default interface, if any.

Returns

pointer to interface, if any.

Get the local gateway.

Parameters

address

SocketAddress representation of gateway address

Return values

NSAPI_ERROR_OK	on success
NSAPI_ERROR_UNSUPPORTED	if this feature is not supported
NSAPI_ERROR_PARAMETER	if the provided pointer is invalid
NSAPI_ERROR_NO_ADDRESS	if the address cannot be obtained from stack

Reimplemented in CellularContext, EMACInterface, CellularInterface, PPPInterface, and AT_CellularContext.

Get the network interface name.

Returns

Null-terminated representation of the network interface name or null if interface not exists

Reimplemented in EMACInterface, L3IPInterface, PPPInterface, and AT_CellularContext.

Get the local IP address.

Parameters

address

SocketAddress representation of the local IP address

Return values

NSAPI_ERROR_OK	on success
NSAPI_ERROR_UNSUPPORTED	if this feature is not supported
NSAPI_ERROR_PARAMETER	if the provided pointer is invalid
NSAPI_ERROR_NO_ADDRESS	if the address cannot be obtained from stack

Reimplemented in CellularContext, InterfaceNanostack, EMACInterface, CellularInterface, PPPInterface, and AT_CellularContext.

Get the IPv6 link local address.

Parameters

address

SocketAddress representation of the link local IPv6 address

Return values

NSAPI_ERROR_OK	on success
NSAPI_ERROR_UNSUPPORTED	if this feature is not supported
NSAPI_ERROR_PARAMETER	if the provided pointer is invalid

Reimplemented in EMACInterface.

Get the local MAC address.

Provided MAC address is intended for info or debug purposes and may be not provided if the underlying network interface does not provide a MAC address.

Returns

Null-terminated representation of the local MAC address or null if no MAC address is available.

Reimplemented in InterfaceNanostack, and EMACInterface.

Get the local network mask.

Parameters

address

SocketAddress representation of netmask

Return values

NSAPI_ERROR_OK	on success
NSAPI_ERROR_UNSUPPORTED	if this feature is not supported
NSAPI_ERROR_PARAMETER	if the provided pointer is invalid
NSAPI_ERROR_NO_ADDRESS	if the address cannot be obtained from stack

Reimplemented in CellularContext, EMACInterface, CellularInterface, PPPInterface, and AT_CellularContext.

Get the current radio signal strength for active connection.

Returns

Connection strength in dBm (negative value), or 0 if measurement impossible.

Implemented in WhdSTAInterface, and RDAWiFiInterface.

Translate a hostname to an IP address with specific version using network interface name.

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	Pointer to a SocketAddress to store the result.
version	IP version of address to resolve, NSAPI_UNSPEC indicates version is chosen by the stack (defaults to NSAPI_UNSPEC).
interface_name	Network interface name

Returns

NSAPI_ERROR_OK on success, negative error code on failure.

Implements DNS.

Translate a hostname to an IP address (asynchronous) using network interface name.

The hostname may be either a domain name or a dotted 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).
interface_name	Network interface name

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.

Implements DNS.

Cancel asynchronous hostname translation.

When translation is cancelled, callback will not be called.

Parameters

id	Unique id of the hostname translation operation (returned by gethostbyname_async)

Returns

NSAPI_ERROR_OK on success, negative error code on failure.

Implements DNS.

Return pointer to a MeshInterface.

Returns

Pointer to requested interface type or NULL if this class doesn't implement the interface.

Reimplemented in MeshInterface.

Definition at line 367 of file NetworkInterface.h.

Remove event listener from interface.

Remove previously added callback from the handler list.

Parameters

status_cb

The callback to unregister.

Scan for available networks.

Note

This is a blocking function.

If the count is 0, the function only returns the number of available networks. If the count is greater than 0 and the res is not NULL, the array of discovered APs is populated with discovered networks up to the value of the count.

Parameters

res	Pointer to allocated array to store discovered APs.
count	Size of allocated res array, or 0 to only count available APs.

Returns

Number of entries in res, or if count was 0, number of available networks. Negative on error (

See also

nsapi_types.h for nsapi_error).

Implemented in RDAWiFiInterface.

Set network interface as default one.

Reimplemented in EMACInterface, L3IPInterface, and PPPInterface.

Set asynchronous operation of connect() and disconnect() calls.

By default, interfaces are in synchronous mode which means that connect() or disconnect() blocks until it reach the target state or requested operation fails.

Parameters

blocking

Use false to set NetworkInterface in asynchronous mode.

Returns

NSAPI_ERROR_OK on success

NSAPI_ERROR_UNSUPPORTED if driver does not support asynchronous mode.

negative error code on failure.

Reimplemented in EMACInterface, InterfaceNanostack, WhdSoftAPInterface, L3IPInterface, PPPInterface, WhdSTAInterface, CellularContext, and AT_CellularContext.

Set the Wi-Fi network channel.

Parameters

channel

Channel to make the connection, or 0 for any (Default: 0).

Returns

NSAPI_ERROR_OK on success, or error code on failure.

Implemented in WhdSTAInterface, and RDAWiFiInterface.

Set the Wi-Fi network credentials.

Parameters

ssid	Name of the network to connect to.
pass	Security passphrase to connect to the network.
security	Type of encryption for connection (defaults to NSAPI_SECURITY_NONE).

Returns

NSAPI_ERROR_OK on success, or error code on failure.

Implemented in WhdSTAInterface, and RDAWiFiInterface.

defined(DOXYGEN_ONLY)

Set default parameters on a Wi-Fi interface.

A Wi-Fi interface instantiated directly or using WiFiInterface::get_default_instance() is initially unconfigured. This call can be used to set the default parameters that would have been set if the interface had been requested using NetworkInterface::get_default_instance() (see nsapi JSON configuration).

Reimplemented from NetworkInterface.

Enable or disable DHCP on connecting the network.

Enabled by default unless a static IP address has been assigned. Requires that the network is disconnected.

Parameters

dhcp	True to enable DHCP.

Returns

NSAPI_ERROR_OK on success, negative error code on failure.

Reimplemented in EMACInterface, and L3IPInterface.

Configure this network interface to use a static IP address.

Implicitly disables DHCP, which can be enabled in set_dhcp. Requires that the network is disconnected.

Parameters

ip_address	SocketAddress object containing the local IP address
netmask	SocketAddress object containing the local network mask
gateway	SocketAddress object containing the local gateway

Returns

NSAPI_ERROR_OK on success, negative error code on failure

Reimplemented in EMACInterface.

Return pointer to a WiFiInterface.

Returns

Pointer to requested interface type or NULL if this class doesn't implement the interface.

Reimplemented from NetworkInterface.

Definition at line 109 of file WiFiInterface.h.