Mbed OS Reference | EMACInterface.h Source File

 /* LWIP implementation of NetworkInterfaceAPI
  * Copyright (c) 2015 ARM Limited
  * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *     http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
 
 #ifndef EMAC_INTERFACE_H
 #define EMAC_INTERFACE_H
 
 #include "nsapi.h"
 #include "EMAC.h"
 #include "OnboardNetworkStack.h"
 
 
 /** 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 `WiFi::get_emac().power_up()` as soon as
  * the credentials have been set. This is necessary to support specialized
  * applications such as 6LoWPAN mesh border routers.
  */
 class EMACInterface : public virtual NetworkInterface {
 public:
     /** 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().
      *
      * @param emac  Reference to EMAC to use
      * @param stack Reference to onboard-network stack to use
      */
     EMACInterface(EMAC &emac = EMAC::get_default_instance(),
                   OnboardNetworkStack &stack = OnboardNetworkStack::get_default_instance());
 
     /** 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.
      *
      *  @param ip_address  SocketAddress representation of the local IP address
      *  @param netmask     SocketAddress representation of the local network mask
      *  @param gateway     SocketAddress representation of the local gateway
      *  @return            0 on success, negative error code on failure
      */
     nsapi_error_t set_network(const SocketAddress &ip_address, const SocketAddress &netmask, const SocketAddress &gateway) override;
 
     /** Enable or disable DHCP on the network
      *
      *  Requires that the network is disconnected
      *
      *  @param dhcp     False to disable dhcp (defaults to enabled)
      *  @retval         NSAPI_ERROR_OK on success.
      *  @retval         NSAPI_ERROR_UNSUPPORTED if operation is not supported.
      */
     nsapi_error_t set_dhcp(bool dhcp) override;
 
     /** @copydoc NetworkInterface::connect */
     nsapi_error_t connect() override;
 
     /** @copydoc NetworkInterface::disconnect */
     nsapi_error_t disconnect() override;
 
     /** @copydoc NetworkInterface::get_mac_address */
     const char *get_mac_address() override;
 
     /** @copydoc NetworkInterface::get_ip_address */
     nsapi_error_t get_ip_address(SocketAddress *address) override;
 
     /** @copydoc NetworkInterface::get_ipv6_link_local_address */
     nsapi_error_t get_ipv6_link_local_address(SocketAddress *address) override;
 
     /** @copydoc NetworkInterface::get_netmask */
     nsapi_error_t get_netmask(SocketAddress *address) override;
 
     /** @copydoc NetworkInterface::get_gateway */
     nsapi_error_t get_gateway(SocketAddress *address) override;
 
     /** @copydoc NetworkInterface::get_interface_name */
     char *get_interface_name(char *interface_name) override;
 
     /** @copydoc NetworkInterface::set_as_default */
     void set_as_default() override;
 
     /** @copydoc NetworkInterface::attach */
     void attach(mbed::Callback<void(nsapi_event_t, intptr_t)> status_cb) override;
 
     /** @copydoc NetworkInterface::get_connection_status */
     nsapi_connection_status_t get_connection_status() const override;
 
     /** @copydoc NetworkInterface::set_blocking */
     nsapi_error_t set_blocking(bool blocking) override;
 
     /** 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.
      *
      * @return          Reference to the EMAC in use
      */
     EMAC &get_emac() const
     {
         return _emac;
     }
 
     EMACInterface *emacInterface() final
     {
         return this;
     }
 
 protected:
     /** Provide access to the underlying stack
      *
      *  @return The underlying network stack
      */
     NetworkStack *get_stack() final;
 
     EMAC &_emac;
     OnboardNetworkStack &_stack;
     OnboardNetworkStack::Interface *_interface = nullptr;
     bool _dhcp = true;
     bool _blocking = true;
     char _mac_address[NSAPI_MAC_SIZE];
     char _ip_address[NSAPI_IPv6_SIZE] {};
     char _netmask[NSAPI_IPv4_SIZE] {};
     char _gateway[NSAPI_IPv4_SIZE] {};
     mbed::Callback<void(nsapi_event_t, intptr_t)> _connection_status_cb;
 };
 
 #endif
Important Information for this Arm website
