File content as of revision 6:993197aaf5a4:

/* LWIP implementation of NetworkInterfaceAPI
 * Copyright (c) 2015 ARM Limited
 *
 * 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 LWIPBP3595_INTERFACE_H
#define LWIPBP3595_INTERFACE_H

#include "nsapi.h"
#include "rtos.h"
#include "lwip/netif.h"

// Forward declaration
class NetworkStack;


/** EthernetInterface class
 *  Implementation of the NetworkStack for LWIP
 */
class LWIPBP3595Interface : public WiFiInterface
{
public:
    /** LWIPBP3595Interface lifetime
     */
    LWIPBP3595Interface();

    /** 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 address  Null-terminated representation of the local IP address
     *  @param netmask  Null-terminated representation of the local network mask
     *  @param gateway  Null-terminated representation of the local gateway
     *  @return         0 on success, negative error code on failure
     */
    virtual nsapi_error_t set_network(const char *ip_address, const char *netmask, const char *gateway);

    /** Enable or disable DHCP on the network
     *
     *  Requires that the network is disconnected
     *
     *  @param dhcp     False to disable dhcp (defaults to enabled)
     *  @return         0 on success, negative error code on failure
     */
    virtual nsapi_error_t set_dhcp(bool dhcp);

    /** Set the WiFi network credentials
     *
     *  @param ssid      Name of the network to connect to
     *  @param pass      Security passphrase to connect to the network
     *  @param security  Type of encryption for connection
     *                   (defaults to NSAPI_SECURITY_NONE)
     *  @return          0 on success, or error code on failure
     */
    virtual nsapi_error_t set_credentials(const char *ssid, const char *pass,
            nsapi_security_t security = NSAPI_SECURITY_WPA_WPA2);

    /** Set the WiFi network channel
     *
     *  @param channel   Channel on which the connection is to be made, or 0 for any (Default: 0)
     *  @return          0 on success, or error code on failure
     */
    virtual nsapi_error_t set_channel(uint8_t channel);

    /** Gets the current radio signal strength for active connection
     *
     *  @return         Connection strength in dBm (negative value),
     *                  or 0 if measurement impossible
     */
    virtual int8_t get_rssi();

    /** Start the interface
     *
     *  Attempts to connect to a WiFi network.
     *
     *  @param ssid      Name of the network to connect to
     *  @param pass      Security passphrase to connect to the network
     *  @param security  Type of encryption for connection (Default: NSAPI_SECURITY_NONE)
     *  @param channel   Channel on which the connection is to be made, or 0 for any (Default: 0)
     *  @return          0 on success, or error code on failure
     */
    virtual nsapi_error_t connect(const char *ssid, const char *pass,
            nsapi_security_t security = NSAPI_SECURITY_WPA2, uint8_t channel = 0);

    /** 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.
     *
     *  @return         0 on success, negative error code on failure
     */
    virtual nsapi_error_t connect();

    /** Stop the interface
     *  @return             0 on success, negative on failure
     */
    virtual nsapi_error_t disconnect();

    /** Scan for available networks
     *
     *  This function will block. If the @a 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 ap is not NULL it'll be populated
     *  with discovered networks up to value of @a count.
     *
     *  @param  ap       Pointer to allocated array to store discovered AP
     *  @param  count    Size of allocated @a res array, or 0 to only count available AP
     *  @return          Number of entries in @a, or if @a count was 0 number of available networks,
     *                   negative on error see @a nsapi_error
     */
    virtual nsapi_size_or_error_t scan(WiFiAccessPoint *res, unsigned count);

    /** 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
     *  
     *  @return         Null-terminated representation of the local MAC address
     *                  or null if no MAC address is available
     */
    virtual const char *get_mac_address();

    /** Get the local IP address
     *
     *  @return         Null-terminated representation of the local IP address
     *                  or null if no IP address has been recieved
     */
    virtual const char *get_ip_address();

    /** Get the local network mask
     *
     *  @return         Null-terminated representation of the local network mask 
     *                  or null if no network mask has been recieved
     */
    virtual const char *get_netmask();

    /** Get the local gateways
     *
     *  @return         Null-terminated representation of the local gateway
     *                  or null if no network mask has been recieved
     */
    virtual const char *get_gateway();

protected:
    /** Provide access to the underlying stack
     *
     *  @return The underlying network stack 
     */
    virtual NetworkStack *get_stack();

    bool _dhcp;
    char _ip_address[IPADDR_STRLEN_MAX];
    char _netmask[NSAPI_IPv4_SIZE];
    char _gateway[NSAPI_IPv4_SIZE];

private:
    char _ssid[33];
    char _pass[64];
    nsapi_security_t _security;
};


#endif