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	Negative error code on failure or value that represents the number of DNS records
address	On success, destination for the host SocketAddress.

Definition at line 259 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.

Parameters

status_cb

The callback for status changes

Reimplemented from NetworkInterface.

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 431 of file NetworkInterface.h.

Start the interface.

Returns

0 on success, negative error code on failure

Implements NetworkInterface.

Stop the interface.

Returns

0 on success, negative error code on failure

Implements NetworkInterface.

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 423 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 399 of file NetworkInterface.h.

Get the connection status.

Returns

The connection status according to ConnectionStatusType

Reimplemented from NetworkInterface.

Return the default network interface.

Returns the default network interface, as determined by JSON option target.network-default-interface-type or other overrides.

The type of the interface returned can be tested by calling ethInterface(), wifiInterface(), meshInterface(), cellularInterface(), emacInterface() and checking for NULL pointers.

The default behavior is to return the default interface for the interface type specified by target.network-default-interface-type. Targets should set this in their targets.json to guide default selection, and applications may override.

The interface returned should be already configured for use such that its connect() method works with no parameters. For connection types needing configuration, settings should normally be obtained from JSON - the settings for the core types are under the "nsapi" JSON config tree.

The list of possible settings for default interface type is open-ended, as is the number of possible providers. Core providers are:

• ETHERNET: EthernetInterface, using default EMAC and OnboardNetworkStack
• MESH: ThreadInterface or LoWPANNDInterface, using default NanostackRfPhy
• CELLULAR: OnboardModemInterface
• WIFI: None - always provided by a specific class

Specific drivers may be activated by other settings of the default-network-interface-type configuration. This will depend on the target and the driver. For example a board may have its default setting as "AUTO" which causes it to autodetect an Ethernet cable. This should be described in the target's documentation.

An application can override all target settings by implementing NetworkInterface::get_default_instance() themselves - the default definition is weak, and calls get_target_default_instance().

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
interface_name	Network interface name

Returns

NSAPI_ERROR_OK on success, negative error code on failure

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 EMACInterface, L3IPInterface, PPPInterface, and UBLOX_AT_CellularContext.

Get the interface ID.

Returns

Interface identifier

Definition at line 148 of file MeshInterfaceNanostack.h.

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 from NetworkInterface.

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 internally stored MAC address /return MAC address of the interface.

Reimplemented from NetworkInterface.

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 EMACInterface, L3IPInterface, and PPPInterface.

Translate a hostname to the multiple IP addresses 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

hostname	Hostname to resolve.
hints	Pointer to a SocketAddress with query parameters.
res	Pointer to a SocketAddress array to store the result..
interface_name	Network interface name

Returns

number of results on success, negative error code on failure.

Implements DNS.

Translate a hostname to the multiple IP addresses (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

hostname	Hostname to resolve.
hints	Pointer to a SocketAddress with query parameters.
callback	Callback that is called for result.
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.

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

Return values

NSAPI_ERROR_OK	on success
int	Negative error code on failure. See NetworkStack::gethostbyname

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 415 of file NetworkInterface.h.

Set network interface as default one.

Reimplemented in EMACInterface, L3IPInterface, and PPPInterface.

Set blocking status of connect() which by default should be blocking.

Parameters

blocking

true if connect is blocking

Returns

0 on success, negative error code on failure

Reimplemented from NetworkInterface.

defined(DOXYGEN_ONLY)

Set default parameters on an interface.

A network interface instantiated directly or using calls such as 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 in WiFiInterface, and CellularInterface.

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.

Return values

NSAPI_ERROR_OK	on success.
NSAPI_ERROR_UNSUPPORTED	if operation is not supported.

Reimplemented in EMACInterface, and L3IPInterface.

Set file system root path.

Set file system root path that stack will use to write and read its data. Setting root_path to NULL will disable file system usage.

Parameters

root_path

Address to NUL-terminated root-path string or NULL to disable file system usage.

Returns

MESH_ERROR_NONE on success, MESH_ERROR_MEMORY in case of memory failure, MESH_ERROR_UNKNOWN in case of other error.

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

Return values

NSAPI_ERROR_OK	on success
NSAPI_ERROR_UNSUPPORTED	if this function is unsupported

Reimplemented in EMACInterface, L3IPInterface, and PPPInterface.

Return pointer to a WiFiInterface.

Returns

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

Reimplemented in WiFiInterface.

Definition at line 407 of file NetworkInterface.h.