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EMACInterface Class Reference
EMACInterface class Implementation of the NetworkInterface for an EMAC-based driver. More...
#include <EMACInterface.h>
Inherits NetworkInterface.
Inherited by EthernetInterface.
Public Types | |
typedef mbed::Callback< void(nsapi_error_t result, SocketAddress *address) | hostbyname_cb_t ) |
Hostname translation callback (asynchronous) | |
Public Member Functions | |
EMACInterface (EMAC &emac=EMAC::get_default_instance(), OnboardNetworkStack &stack=OnboardNetworkStack::get_default_instance()) | |
Create an EMAC-based network interface. | |
virtual nsapi_error_t | set_network (const char *ip_address, const char *netmask, const char *gateway) |
Set a static IP address. | |
virtual nsapi_error_t | set_dhcp (bool dhcp) |
Enable or disable DHCP on the network. | |
virtual nsapi_error_t | connect () |
Start the interface. | |
virtual nsapi_error_t | disconnect () |
Stop the interface. | |
virtual const char * | get_mac_address () |
Get the local MAC address. | |
virtual const char * | get_ip_address () |
Get the local IP address. | |
virtual const char * | get_netmask () |
Get the local network mask. | |
virtual const char * | get_gateway () |
Get the local gateways. | |
virtual void | attach (mbed::Callback< void(nsapi_event_t, intptr_t)> status_cb) |
Register callback for status reporting. | |
virtual nsapi_connection_status_t | get_connection_status () const |
Get the connection status. | |
virtual nsapi_error_t | set_blocking (bool blocking) |
Set blocking status of connect() which by default should be blocking. | |
EMAC & | get_emac () const |
Provide access to the EMAC. | |
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 EthInterface * | ethInterface () |
Dynamic downcast to an EthInterface. | |
virtual WiFiInterface * | wifiInterface () |
Dynamic downcast to a WiFiInterface. | |
virtual MeshInterface * | meshInterface () |
Dynamic downcast to a MeshInterface. | |
virtual CellularBase * | cellularBase () |
Dynamic downcast to a CellularBase. | |
Static Public Member Functions | |
static NetworkInterface * | get_default_instance () |
Return the default network interface. | |
Protected Member Functions | |
virtual NetworkStack * | get_stack () |
Provide access to the underlying stack. | |
Static Protected Member Functions | |
static NetworkInterface * | get_target_default_instance () |
Get the target's default network instance. | |
Friends | |
class | Socket |
class | UDPSocket |
class | TCPSocket |
Detailed Description
EMACInterface class Implementation of the NetworkInterface for an EMAC-based driver.
This class provides the necessary glue logic to create a NetworkInterface based on an EMAC and an OnboardNetworkStack. EthernetInterface and EMAC-based Wi-Fi drivers derive from it.
Drivers derived from EMACInterface should be constructed so that their EMAC is functional without the need to call `connect()`. For example a Wi-Fi driver should permit `WiFiget_emac().power_up()` as soon as the credentials have been set. This is necessary to support specialised applications such as 6LoWPAN mesh border routers.
Definition at line 39 of file EMACInterface.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 181 of file NetworkInterface.h.
Constructor & Destructor Documentation
EMACInterface | ( | EMAC & | emac = EMAC::get_default_instance() , |
OnboardNetworkStack & | stack = OnboardNetworkStack::get_default_instance() |
||
) |
Create an EMAC-based network 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:
-
emac Reference to EMAC to use stack Reference to onboard-network stack to use
Definition at line 20 of file EMACInterface.cpp.
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 60 of file NetworkInterface_stub.cpp.
virtual void attach | ( | mbed::Callback< void(nsapi_event_t, intptr_t)> | status_cb ) | [virtual] |
Register callback for status reporting.
- Parameters:
-
status_cb The callback for status changes
virtual CellularBase* cellularBase | ( | ) | [virtual, inherited] |
Dynamic downcast to a CellularBase.
Definition at line 263 of file NetworkInterface.h.
nsapi_error_t connect | ( | ) | [virtual] |
Start the interface.
- Returns:
- 0 on success, negative on failure
Definition at line 52 of file EMACInterface.cpp.
nsapi_error_t disconnect | ( | void | ) | [virtual] |
Stop the interface.
- Returns:
- 0 on success, negative on failure
Definition at line 71 of file EMACInterface.cpp.
virtual EthInterface* ethInterface | ( | ) | [virtual, inherited] |
Dynamic downcast to an EthInterface.
Definition at line 248 of file NetworkInterface.h.
nsapi_connection_status_t get_connection_status | ( | ) | const [virtual] |
Get the connection status.
- Returns:
- The connection status according to nsapi_connection_status_t
Definition at line 128 of file EMACInterface.cpp.
MBED_WEAK NetworkInterface * get_default_instance | ( | ) | [static, inherited] |
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 via the ethInterface() etc downcasts.
The default behaviour 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().
Definition at line 60 of file NetworkInterfaceDefaults.cpp.
EMAC& get_emac | ( | ) | const |
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 151 of file EMACInterface.h.
const char * get_gateway | ( | ) | [virtual] |
Get the local gateways.
- Returns:
- Null-terminated representation of the local gateway or null if no network mask has been recieved
Definition at line 105 of file EMACInterface.cpp.
const char * get_ip_address | ( | ) | [virtual] |
Get the local IP address.
- Returns:
- Null-terminated representation of the local IP address or null if no IP address has been recieved
Definition at line 87 of file EMACInterface.cpp.
const char * get_mac_address | ( | ) | [virtual] |
Get the local MAC address.
Provided MAC address is intended for info or debug purposes and may not be 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
Definition at line 79 of file EMACInterface.cpp.
const char * get_netmask | ( | ) | [virtual] |
Get the local network mask.
- Returns:
- Null-terminated representation of the local network mask or null if no network mask has been recieved
Definition at line 96 of file EMACInterface.cpp.
NetworkStack * get_stack | ( | void | ) | [protected, virtual] |
Provide access to the underlying stack.
- Returns:
- The underlying network stack
Definition at line 114 of file EMACInterface.cpp.
MBED_WEAK NetworkInterface * get_target_default_instance | ( | ) | [static, protected, inherited] |
Get the target's default network instance.
This method can be overridden by the target. Default implementations are provided weakly by various subsystems as described in NetworkInterface::get_default_instance(), so targets should not need to override in simple cases.
If a target has more elaborate interface selection, it can completely override this behaviour by implementing NetworkInterface::get_target_default_instance() themselves, either unconditionally, or for a specific network-default-interface-type setting
For example, a device with both Ethernet and Wi-fi could be set up its target so that: * DEVICE_EMAC is set, and it provides EMAC::get_default_instance(), which means EthernetInterface provides EthInterface::get_target_instance() based on that EMAC. * It provides WifiInterface::get_target_default_instance(). * The core will route NetworkInterface::get_default_instance() to either of those if network-default-interface-type is set to ETHERNET or WIFI. * The board overrides NetworkInterface::get_target_default_instance() if network-default-interface-type is set to AUTO. This returns either EthInterface::get_default_instance() or WiFIInterface::get_default_instance() depending on a cable detection.
performs the search described by get_default_instance.
Definition at line 74 of file NetworkInterfaceDefaults.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 55 of file NetworkInterface_stub.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 63 of file NetworkInterface.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 85 of file NetworkInterface_stub.cpp.
virtual MeshInterface* meshInterface | ( | ) | [virtual, inherited] |
Dynamic downcast to a MeshInterface.
Definition at line 258 of file NetworkInterface.h.
nsapi_error_t set_blocking | ( | bool | blocking ) | [virtual] |
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
Definition at line 137 of file EMACInterface.cpp.
nsapi_error_t set_dhcp | ( | bool | dhcp ) | [virtual] |
Enable or disable DHCP on the network.
Requires that the network is disconnected
- Parameters:
-
dhcp False to disable dhcp (defaults to enabled)
- Returns:
- 0 on success, negative error code on failure
Definition at line 46 of file EMACInterface.cpp.
nsapi_error_t set_network | ( | const char * | ip_address, |
const char * | netmask, | ||
const char * | gateway | ||
) | [virtual] |
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_address Null-terminated representation of the local IP address netmask Null-terminated representation of the local network mask gateway Null-terminated representation of the local gateway
- Returns:
- 0 on success, negative error code on failure
Definition at line 32 of file EMACInterface.cpp.
virtual WiFiInterface* wifiInterface | ( | ) | [virtual, inherited] |
Dynamic downcast to a WiFiInterface.
Definition at line 253 of file NetworkInterface.h.
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