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/******************************************************************************
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*
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* Copyright(c) 2007 - 2015 Realtek Corporation. All rights reserved.
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*
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*
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******************************************************************************/
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/** @file
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This example demonstrate how to implement wifi fast reconnection
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**/
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#include <platform_opts.h>
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#include <wlan_fast_connect/example_wlan_fast_connect.h>
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#include "task.h"
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#include <platform/platform_stdlib.h>
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#include <wifi/wifi_conf.h>
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#include "flash_api.h"
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#include "device_lock.h"
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#include <lwip_netconf.h>
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write_reconnect_ptr p_write_reconnect_ptr;
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/*
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* Usage:
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* wifi connection indication trigger this function to save current
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* wifi profile in flash
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*
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* Condition:
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* CONFIG_EXAMPLE_WLAN_FAST_CONNECT flag is set
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*/
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int wlan_wrtie_reconnect_data_to_flash(u8 *data, uint32_t len)
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{
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flash_t flash;
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struct wlan_fast_reconnect read_data = {0};
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if(!data)
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return -1;
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device_mutex_lock(RT_DEV_LOCK_FLASH);
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flash_stream_read(&flash, FAST_RECONNECT_DATA, sizeof(struct wlan_fast_reconnect), (u8 *) &read_data);
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#if ATCMD_VER == ATVER_2
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struct wlan_fast_reconnect *copy_data = (struct wlan_fast_reconnect *) data;
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copy_data->enable = read_data.enable;
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#endif
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//wirte it to flash if different content: SSID, Passphrase, Channel, Security type
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if(memcmp(data, (u8 *) &read_data, sizeof(struct wlan_fast_reconnect)) != 0) {
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printf("\r\n %s():not the same ssid/passphrase/channel, write new profile to flash", __func__);
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flash_erase_sector(&flash, FAST_RECONNECT_DATA);
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flash_stream_write(&flash, FAST_RECONNECT_DATA, len, (uint8_t *) data);
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}
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device_mutex_unlock(RT_DEV_LOCK_FLASH);
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return 0;
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}
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/*
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* Usage:
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* After wifi init done, waln driver call this function to check whether
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* auto-connect is required.
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*
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* This function read previous saved wlan profile in flash and execute connection.
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*
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* Condition:
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* CONFIG_EXAMPLE_WLAN_FAST_CONNECT flag is set
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*/
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int wlan_init_done_callback()
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{
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flash_t flash;
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struct wlan_fast_reconnect *data;
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uint32_t channel;
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uint32_t security_type;
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uint8_t pscan_config;
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char key_id[2] = {0};
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rtw_network_info_t wifi = {
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{0}, // ssid
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{0}, // bssid
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0, // security
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NULL, // password
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0, // password len
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-1 // key id
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};
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#if CONFIG_AUTO_RECONNECT
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//setup reconnection flag
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wifi_set_autoreconnect(1);
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#endif
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data = (struct wlan_fast_reconnect *)rtw_zmalloc(sizeof(struct wlan_fast_reconnect));
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if(data){
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device_mutex_lock(RT_DEV_LOCK_FLASH);
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flash_stream_read(&flash, FAST_RECONNECT_DATA, sizeof(struct wlan_fast_reconnect), (uint8_t *)data);
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device_mutex_unlock(RT_DEV_LOCK_FLASH);
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memcpy(psk_essid, data->psk_essid, sizeof(data->psk_essid));
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memcpy(psk_passphrase, data->psk_passphrase, sizeof(data->psk_passphrase));
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memcpy(wpa_global_PSK, data->wpa_global_PSK, sizeof(data->wpa_global_PSK));
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channel = data->channel;
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sprintf(key_id,"%d",(char) (channel>>28));
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channel &= 0xff;
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security_type = data->security_type;
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pscan_config = PSCAN_ENABLE | PSCAN_FAST_SURVEY;
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//set partial scan for entering to listen beacon quickly
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wifi_set_pscan_chan((uint8_t *)&channel, &pscan_config, 1);
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wifi.security_type = security_type;
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//SSID
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strcpy((char *)wifi.ssid.val, (char*)psk_essid);
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wifi.ssid.len = strlen((char*)psk_essid);
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switch(security_type){
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case RTW_SECURITY_WEP_PSK:
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wifi.password = (unsigned char*) psk_passphrase;
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wifi.password_len = strlen((char*)psk_passphrase);
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wifi.key_id = atoi((const char *)key_id);
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break;
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case RTW_SECURITY_WPA_TKIP_PSK:
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case RTW_SECURITY_WPA2_AES_PSK:
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wifi.password = (unsigned char*) psk_passphrase;
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wifi.password_len = strlen((char*)psk_passphrase);
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break;
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default:
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break;
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}
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wifi_connect((char*)wifi.ssid.val, wifi.security_type, (char*)wifi.password, wifi.ssid.len,
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wifi.password_len, wifi.key_id, NULL);
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LwIP_DHCP(0, DHCP_START);
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rtw_mfree(data);
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}
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return 0;
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}
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int Erase_Fastconnect_data(){
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flash_t flash;
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device_mutex_lock(RT_DEV_LOCK_FLASH);
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flash_erase_sector(&flash, FAST_RECONNECT_DATA);
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device_mutex_unlock(RT_DEV_LOCK_FLASH);
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return 0;
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}
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void example_wlan_fast_connect()
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{
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// Call back from wlan driver after wlan init done
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p_wlan_init_done_callback = wlan_init_done_callback;
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// Call back from application layer after wifi_connection success
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p_write_reconnect_ptr = wlan_wrtie_reconnect_data_to_flash;
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}
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#ifndef __EXAMPLE_FAST_RECONNECTION_H__
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#define __EXAMPLE_FAST_RECONNECTION_H__
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/******************************************************************************
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*
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* Copyright(c) 2007 - 2015 Realtek Corporation. All rights reserved.
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*
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*
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******************************************************************************/
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#include "FreeRTOS.h"
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#include <autoconf.h>
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#include "main.h"
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#define IW_PASSPHRASE_MAX_SIZE 64
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//#define FAST_RECONNECT_DATA (0x80000 - 0x1000)
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#define NDIS_802_11_LENGTH_SSID 32
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#define A_SHA_DIGEST_LEN 20
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struct wlan_fast_reconnect {
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unsigned char psk_essid[NDIS_802_11_LENGTH_SSID + 4];
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unsigned char psk_passphrase[IW_PASSPHRASE_MAX_SIZE + 1];
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unsigned char wpa_global_PSK[A_SHA_DIGEST_LEN * 2];
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uint32_t channel;
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uint32_t security_type;
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#if ATCMD_VER == ATVER_2
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uint32_t enable;
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#endif
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};
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typedef int (*wlan_init_done_ptr)(void);
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typedef int (*write_reconnect_ptr)(uint8_t *data, uint32_t len);
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//Variable
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extern unsigned char psk_essid[NET_IF_NUM][NDIS_802_11_LENGTH_SSID+4];
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extern unsigned char psk_passphrase[NET_IF_NUM][IW_PASSPHRASE_MAX_SIZE + 1];
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extern unsigned char wpa_global_PSK[NET_IF_NUM][A_SHA_DIGEST_LEN * 2];
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extern unsigned char psk_passphrase64[IW_PASSPHRASE_MAX_SIZE + 1];
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//Function
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extern wlan_init_done_ptr p_wlan_init_done_callback;
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extern write_reconnect_ptr p_write_reconnect_ptr;
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void example_wlan_fast_connect(void);
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#endif //#ifndef __EXAMPLE_FAST_RECONNECTION_H__
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