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Public Types | Public Member Functions | Static Public Member Functions | Protected Member Functions
RDAWiFiInterface Class Reference

RDAWiFiInterface class Implementation of the NetworkStack for an EMAC-based Ethernet driver. More...

#include <RdaWiFiInterface.h>

Inheritance diagram for RDAWiFiInterface:
EMACInterface WiFiInterface NetworkInterface NetworkInterface DNS DNS

Public Types

typedef mbed::Callback< void(nsapi_value_or_error_t result, SocketAddress *address)> hostbyname_cb_t
 Hostname translation callback (for use with gethostbyname_async()). More...
 

Public Member Functions

 RDAWiFiInterface (EMAC &emac=EMAC::get_default_instance(), OnboardNetworkStack &stack=OnboardNetworkStack::get_default_instance())
 Create an EMAC-based ethernet interface. More...
 
virtual nsapi_error_t set_credentials (const char *ssid, const char *pass, nsapi_security_t security=NSAPI_SECURITY_NONE)
 Set the WiFi network credentials. More...
 
virtual nsapi_error_t set_channel (uint8_t channel)
 Set the WiFi network channel. More...
 
virtual int8_t get_rssi ()
 Gets the current radio signal strength for active connection. More...
 
virtual nsapi_error_t connect (const char *ssid, const char *pass, nsapi_security_t security=NSAPI_SECURITY_NONE, uint8_t channel=0)
 Start the interface. More...
 
virtual nsapi_error_t connect ()
 Start the interface. More...
 
virtual nsapi_error_t disconnect ()
 Stop the interface. More...
 
virtual nsapi_error_t reconnect ()
 Restart the interface. More...
 
virtual nsapi_size_or_error_t scan (WiFiAccessPoint *res, nsapi_size_t count)
 Scan for available networks. More...
 
nsapi_error_t set_network (const SocketAddress &ip_address, const SocketAddress &netmask, const SocketAddress &gateway) override
 Set a static IP address. More...
 
nsapi_error_t set_dhcp (bool dhcp) override
 Enable or disable DHCP on the network. More...
 
const char * get_mac_address () override
 Get the local MAC address. More...
 
nsapi_error_t get_ip_address (SocketAddress *address) override
 Get the local IP address. More...
 
nsapi_error_t get_ipv6_link_local_address (SocketAddress *address) override
 Get the IPv6 link local address. More...
 
nsapi_error_t get_netmask (SocketAddress *address) override
 Get the local network mask. More...
 
nsapi_error_t get_gateway (SocketAddress *address) override
 Get the local gateway. More...
 
char * get_interface_name (char *interface_name) override
 Get the network interface name. More...
 
void set_as_default () override
 Set network interface as default one. More...
 
void attach (mbed::Callback< void(nsapi_event_t, intptr_t)> status_cb) override
 Register callback for status reporting. More...
 
nsapi_connection_status_t get_connection_status () const override
 Get the connection status. More...
 
nsapi_error_t set_blocking (bool blocking) override
 Set asynchronous operation of connect() and disconnect() calls. More...
 
EMACget_emac () const
 Provide access to the EMAC. More...
 
EMACInterfaceemacInterface () final
 Return pointer to an EMACInterface. More...
 
virtual nsapi_error_t gethostbyname (const char *host, SocketAddress *address, nsapi_version_t version=NSAPI_UNSPEC, const char *interface_name=NULL)
 Translate a hostname to an IP address with specific version using network interface name. More...
 
virtual nsapi_value_or_error_t getaddrinfo (const char *hostname, SocketAddress *hints, SocketAddress **res, const char *interface_name=NULL)
 Translate a hostname to the multiple IP addresses with specific version using network interface name. More...
 
virtual nsapi_value_or_error_t gethostbyname_async (const char *host, hostbyname_cb_t callback, nsapi_version_t version=NSAPI_UNSPEC, const char *interface_name=NULL)
 Translate a hostname to an IP address (asynchronous) using network interface name. More...
 
virtual nsapi_value_or_error_t getaddrinfo_async (const char *hostname, SocketAddress *hints, hostbyname_cb_t callback, const char *interface_name=NULL)
 Translate a hostname to the multiple IP addresses (asynchronous) using network interface name. More...
 
virtual nsapi_error_t gethostbyname_async_cancel (int id)
 Cancel asynchronous hostname translation. More...
 
virtual nsapi_error_t add_dns_server (const SocketAddress &address, const char *interface_name)
 Add a domain name server to list of servers to query. More...
 
virtual nsapi_error_t get_dns_server (int index, SocketAddress *address, const char *interface_name=NULL)
 Get a domain name server from a list of servers to query. More...
 
void add_event_listener (mbed::Callback< void(nsapi_event_t, intptr_t)> status_cb)
 Add event listener for interface. More...
 
virtual EthInterfaceethInterface ()
 Return pointer to an EthInterface. More...
 
virtual WiFiInterfacewifiInterface ()
 Return pointer to a WiFiInterface. More...
 
virtual MeshInterfacemeshInterface ()
 Return pointer to a MeshInterface. More...
 
virtual CellularInterfacecellularInterface ()
 Return pointer to a CellularInterface. More...
 
virtual void set_default_parameters ()
 defined(DOXYGEN_ONLY) More...
 
WiFiInterfacewifiInterface () final
 Return pointer to a WiFiInterface. More...
 
void set_default_parameters () override
 defined(DOXYGEN_ONLY) More...
 

Static Public Member Functions

static NetworkInterfaceget_default_instance ()
 Return the default network interface. More...
 
static WiFiInterfaceget_default_instance ()
 Get the default Wi-Fi interface. More...
 

Protected Member Functions

NetworkStackget_stack () final
 Provide access to the underlying stack. More...
 

Detailed Description

RDAWiFiInterface class Implementation of the NetworkStack for an EMAC-based Ethernet driver.

Definition at line 30 of file RdaWiFiInterface.h.

Member Typedef Documentation

typedef mbed::Callback<void (nsapi_value_or_error_t result, SocketAddress *address)> hostbyname_cb_t
inherited

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

Definition at line 258 of file NetworkInterface.h.

Constructor & Destructor Documentation

Create an EMAC-based ethernet interface.

The default arguments obtain the default EMAC, which will be target- dependent (and the target may have some JSON option to choose which is the default, if there are multiple). The default stack is configured by JSON option nsapi.default-stack.

Due to inability to return errors from the constructor, no real work is done until the first call to connect().

Parameters
emacReference to EMAC to use
stackReference to onboard-network stack to use

Definition at line 46 of file RdaWiFiInterface.h.

Member Function Documentation

virtual nsapi_error_t add_dns_server ( const SocketAddress address,
const char *  interface_name 
)
virtualinherited

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

Parameters
addressAddress for the dns host.
Returns
NSAPI_ERROR_OK on success, negative error code on failure.

Implements DNS.

void add_event_listener ( mbed::Callback< void(nsapi_event_t, intptr_t)>  status_cb)
inherited

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_cbThe callback for status changes.
void attach ( mbed::Callback< void(nsapi_event_t, intptr_t)>  status_cb)
overridevirtualinherited

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_cbThe callback for status changes.

Reimplemented from NetworkInterface.

virtual CellularInterface* cellularInterface ( )
virtualinherited

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 430 of file NetworkInterface.h.

virtual nsapi_error_t connect ( const char *  ssid,
const char *  pass,
nsapi_security_t  security = NSAPI_SECURITY_NONE,
uint8_t  channel = 0 
)
virtual

Start the interface.

Attempts to connect to a WiFi network.

Parameters
ssidName of the network to connect to
passSecurity passphrase to connect to the network
securityType of encryption for connection (Default: NSAPI_SECURITY_NONE)
channelChannel on which the connection is to be made, or 0 for any (Default: 0)
Returns
0 on success, or error code on failure

Implements WiFiInterface.

virtual nsapi_error_t connect ( )
virtual

Start the interface.

Attempts to connect to a WiFi network. Requires ssid and passphrase to be set. If passphrase is invalid, NSAPI_ERROR_AUTH_ERROR is returned.

Returns
0 on success, negative error code on failure

Implements WiFiInterface.

virtual nsapi_error_t disconnect ( )
virtual

Stop the interface.

Returns
0 on success, or error code on failure

Implements WiFiInterface.

EMACInterface* emacInterface ( )
finalvirtualinherited

Return pointer to an EMACInterface.

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

Reimplemented from NetworkInterface.

Definition at line 128 of file EMACInterface.h.

virtual EthInterface* ethInterface ( )
virtualinherited

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 398 of file NetworkInterface.h.

nsapi_connection_status_t get_connection_status ( ) const
overridevirtualinherited

Get the connection status.

Returns
The connection status (
See also
nsapi_types.h).

Reimplemented from NetworkInterface.

static WiFiInterface* get_default_instance ( )
staticinherited

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.
static NetworkInterface* get_default_instance ( )
staticinherited

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:

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().

virtual nsapi_error_t get_dns_server ( int  index,
SocketAddress address,
const char *  interface_name = NULL 
)
virtualinherited

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
indexIndex of the DNS server, starts from zero
addressDestination for the host address
interface_nameNetwork interface name
Returns
NSAPI_ERROR_OK on success, negative error code on failure
EMAC& get_emac ( ) const
inherited

Provide access to the EMAC.

This should be used with care - normally the network stack would control the EMAC, so manipulating the EMAC while the stack is also using it (ie after connect) will likely cause problems.

Returns
Reference to the EMAC in use

Definition at line 123 of file EMACInterface.h.

nsapi_error_t get_gateway ( SocketAddress address)
overridevirtualinherited

Get the local gateway.

Parameters
addressSocketAddress representation of gateway address
Return values
NSAPI_ERROR_OKon success
NSAPI_ERROR_UNSUPPORTEDif this feature is not supported
NSAPI_ERROR_PARAMETERif the provided pointer is invalid
NSAPI_ERROR_NO_ADDRESSif the address cannot be obtained from stack

Reimplemented from NetworkInterface.

char* get_interface_name ( char *  interface_name)
overridevirtualinherited

Get the network interface name.

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

Reimplemented from NetworkInterface.

nsapi_error_t get_ip_address ( SocketAddress address)
overridevirtualinherited

Get the local IP address.

Parameters
addressSocketAddress representation of the local IP address
Return values
NSAPI_ERROR_OKon success
NSAPI_ERROR_UNSUPPORTEDif this feature is not supported
NSAPI_ERROR_PARAMETERif the provided pointer is invalid
NSAPI_ERROR_NO_ADDRESSif the address cannot be obtained from stack

Reimplemented from NetworkInterface.

nsapi_error_t get_ipv6_link_local_address ( SocketAddress address)
overridevirtualinherited

Get the IPv6 link local address.

Parameters
addressSocketAddress representation of the link local IPv6 address
Return values
NSAPI_ERROR_OKon success
NSAPI_ERROR_UNSUPPORTEDif this feature is not supported
NSAPI_ERROR_PARAMETERif the provided pointer is invalid

Reimplemented from NetworkInterface.

const char* get_mac_address ( )
overridevirtualinherited

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 from NetworkInterface.

nsapi_error_t get_netmask ( SocketAddress address)
overridevirtualinherited

Get the local network mask.

Parameters
addressSocketAddress representation of netmask
Return values
NSAPI_ERROR_OKon success
NSAPI_ERROR_UNSUPPORTEDif this feature is not supported
NSAPI_ERROR_PARAMETERif the provided pointer is invalid
NSAPI_ERROR_NO_ADDRESSif the address cannot be obtained from stack

Reimplemented from NetworkInterface.

virtual int8_t get_rssi ( )
virtual

Gets the current radio signal strength for active connection.

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

Implements WiFiInterface.

NetworkStack* get_stack ( )
finalprotectedinherited

Provide access to the underlying stack.

Returns
The underlying network stack
virtual nsapi_value_or_error_t getaddrinfo ( const char *  hostname,
SocketAddress hints,
SocketAddress **  res,
const char *  interface_name = NULL 
)
virtualinherited

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
hostnameHostname to resolve.
hintsPointer to a SocketAddress with query parameters.
resPointer to a SocketAddress array to store the result..
interface_nameNetwork interface name
Returns
number of results on success, negative error code on failure.

Implements DNS.

virtual nsapi_value_or_error_t getaddrinfo_async ( const char *  hostname,
SocketAddress hints,
hostbyname_cb_t  callback,
const char *  interface_name = NULL 
)
virtualinherited

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
hostnameHostname to resolve.
hintsPointer to a SocketAddress with query parameters.
callbackCallback that is called for result.
interface_nameNetwork 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.

virtual nsapi_error_t gethostbyname ( const char *  host,
SocketAddress address,
nsapi_version_t  version = NSAPI_UNSPEC,
const char *  interface_name = NULL 
)
virtualinherited

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
hostHostname to resolve.
addressPointer to a SocketAddress to store the result.
versionIP version of address to resolve, NSAPI_UNSPEC indicates version is chosen by the stack (defaults to NSAPI_UNSPEC).
interface_nameNetwork interface name
Return values
NSAPI_ERROR_OKon success
intNegative error code on failure. See NetworkStack::gethostbyname

Implements DNS.

virtual nsapi_value_or_error_t gethostbyname_async ( const char *  host,
hostbyname_cb_t  callback,
nsapi_version_t  version = NSAPI_UNSPEC,
const char *  interface_name = NULL 
)
virtualinherited

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
hostHostname to resolve.
callbackCallback that is called for result.
versionIP version of address to resolve, NSAPI_UNSPEC indicates version is chosen by the stack (defaults to NSAPI_UNSPEC).
interface_nameNetwork 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.

virtual nsapi_error_t gethostbyname_async_cancel ( int  id)
virtualinherited

Cancel asynchronous hostname translation.

When translation is cancelled, callback will not be called.

Parameters
idUnique id of the hostname translation operation (returned by gethostbyname_async)
Returns
NSAPI_ERROR_OK on success, negative error code on failure.

Implements DNS.

virtual MeshInterface* meshInterface ( )
virtualinherited

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 414 of file NetworkInterface.h.

virtual nsapi_error_t reconnect ( )
virtual

Restart the interface.

Attempts to reconnect to a WiFi network. Ssid and passphrase has been stored.

Returns
0 on success, negative error code on failure
virtual nsapi_size_or_error_t scan ( WiFiAccessPoint res,
nsapi_size_t  count 
)
virtual

Scan for available networks.

This function will block. If the count is 0, function will only return count of available networks, so that user can allocated necessary memory. If the count is grater than 0 and the a res is not NULL it'll be populated with discovered networks up to value of count.

Parameters
resPointer to allocated array to store discovered AP
countSize of allocated res array, or 0 to only count available AP
Returns
Number of entries in count, or if count was 0 number of available networks, negative on error see nsapi_error

Implements WiFiInterface.

void set_as_default ( )
overridevirtualinherited

Set network interface as default one.

Reimplemented from NetworkInterface.

nsapi_error_t set_blocking ( bool  blocking)
overridevirtualinherited

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
blockingUse 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 from NetworkInterface.

virtual nsapi_error_t set_channel ( uint8_t  channel)
virtual

Set the WiFi network channel.

Parameters
channelChannel on which the connection is to be made, or 0 for any (Default: 0)
Returns
0 on success, or error code on failure

Implements WiFiInterface.

virtual nsapi_error_t set_credentials ( const char *  ssid,
const char *  pass,
nsapi_security_t  security = NSAPI_SECURITY_NONE 
)
virtual

Set the WiFi network credentials.

Parameters
ssidName of the network to connect to
passSecurity passphrase to connect to the network
securityType of encryption for connection (defaults to NSAPI_SECURITY_NONE)
Returns
0 on success, or error code on failure

Implements WiFiInterface.

void set_default_parameters ( )
overridevirtualinherited

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.

virtual void set_default_parameters ( )
virtualinherited

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.

nsapi_error_t set_dhcp ( bool  dhcp)
overridevirtualinherited

Enable or disable DHCP on the network.

Requires that the network is disconnected

Parameters
dhcpFalse to disable dhcp (defaults to enabled)
Return values
NSAPI_ERROR_OKon success.
NSAPI_ERROR_UNSUPPORTEDif operation is not supported.

Reimplemented from NetworkInterface.

nsapi_error_t set_network ( const SocketAddress ip_address,
const SocketAddress netmask,
const SocketAddress gateway 
)
overridevirtualinherited

Set a static IP address.

Configures 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_addressSocketAddress representation of the local IP address
netmaskSocketAddress representation of the local network mask
gatewaySocketAddress representation of the local gateway
Returns
0 on success, negative error code on failure

Reimplemented from NetworkInterface.

WiFiInterface* wifiInterface ( )
finalvirtualinherited

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.

virtual WiFiInterface* wifiInterface ( )
virtualinherited

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 406 of file NetworkInterface.h.

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