squeezelite-esp32/components/wifi-manager/network_manager_handlers.c

#ifdef NETWORK_HANDLERS_LOG_LEVEL
#define LOG_LOCAL_LEVEL NETWORK_HANDLERS_LOG_LEVEL
#endif
#include "network_ethernet.h"
#include "network_manager.h"
#include "network_status.h"
#include "network_wifi.h"
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#include "dns_server.h"
#include "esp_log.h"
#include "esp_system.h"
#include "freertos/FreeRTOS.h"
#include "platform_esp32.h"

#include "esp_netif.h"
#include "freertos/task.h"

#include "cJSON.h"
#include "cmd_system.h"
#include "esp_app_format.h"

#include "esp_event.h"
#include "esp_ota_ops.h"
#include "esp_wifi.h"
#include "esp_wifi_types.h"
#include "lwip/api.h"
#include "lwip/err.h"
#include "lwip/ip4_addr.h"
#include "lwip/netdb.h"
#include "mdns.h"
#include "messaging.h"

#include "Config.h"

#include "trace.h"

#include "accessors.h"
#include "bootstate.h"
#include "esp_err.h"
#include "http_server_handlers.h"
#include "network_manager.h"
#include "tools.h"

static const char TAG[] = "network_handlers";

EXT_RAM_ATTR static state_t network_states[TOTAL_NM_STATE];
EXT_RAM_ATTR static state_t Wifi_Active_State[TOTAL_WIFI_ACTIVE_STATE];
EXT_RAM_ATTR static state_t Eth_Active_State[TOTAL_ETH_ACTIVE_STATE];
EXT_RAM_ATTR static state_t Wifi_Configuring_State[TOTAL_WIFI_CONFIGURING_STATE];
static void network_interface_coexistence(state_machine_t* state_machine);
static state_machine_result_t local_traverse_state(state_machine_t* const state_machine, const state_t* const target_state, const char* caller);
static state_machine_result_t local_switch_state(state_machine_t* state_machine, const state_t* const target_state, const char* caller);
void network_execute_cb(state_machine_t* const state_machine, const char* caller);
int get_root_id(const state_t* state);
const state_t* get_root(const state_t* const state);

#define ADD_ROOT(name, ...) ADD_ROOT_FORWARD_DECLARATION(name, ...)
#define ADD_ROOT_LEAF(name, ...) ADD_ROOT_LEAF_FORWARD_DECLARATION(name, ...)
#define ADD_LEAF(name, ...) ADD_LEAF_FORWARD_DECLARATION(name, ...)
ALL_NM_STATE
ALL_ETH_STATE(, )
ALL_WIFI_STATE(, )
ALL_WIFI_CONFIGURING_STATE(, )
#undef ADD_ROOT
#undef ADD_ROOT_LEAF
#undef ADD_LEAF

/*
 *  --------------------- Global variables ---------------------
 */
#define ADD_ROOT(NAME, CHILD) ADD_ROOT_(NAME, CHILD)
#define ADD_LEAF(NAME, PARENT, LEVEL) ADD_LEAF_(NAME, PARENT, LEVEL)
#define ADD_ROOT_LEAF(NAME) ADD_ROOT_LEAF_(NAME)

#define ADD_ROOT_(NAME, CHILD)                                                                                                                       \
    [NAME] = {                                                                                                                                       \
        .Handler = NAME##_handler,                                                                                                                   \
        .Entry = NAME##_entry_handler,                                                                                                               \
        .Exit = NAME##_exit_handler,                                                                                                                 \
        .Level = 0,                                                                                                                                  \
        .Parent = NULL,                                                                                                                              \
        .Id = NAME,                                                                                                                                  \
        .Node = CHILD,                                                                                                                               \
    },

#define ADD_ROOT_LEAF_(NAME)                                                                                                                         \
    [NAME] = {                                                                                                                                       \
        .Handler = NAME##_handler,                                                                                                                   \
        .Entry = NAME##_entry_handler,                                                                                                               \
        .Exit = NAME##_exit_handler,                                                                                                                 \
        .Id = NAME,                                                                                                                                  \
        .Parent = NULL,                                                                                                                              \
    },

#define ADD_LEAF_(NAME, PARENT, LEVEL)                                                                                                               \
    [NAME] = {                                                                                                                                       \
        .Handler = NAME##_handler,                                                                                                                   \
        .Entry = NAME##_entry_handler,                                                                                                               \
        .Exit = NAME##_exit_handler,                                                                                                                 \
        .Id = NAME,                                                                                                                                  \
        .Level = LEVEL,                                                                                                                              \
        .Parent = PARENT,                                                                                                                            \
    },

void network_initialize_state_machine_globals() {
    static state_t loc_network_states[] = {ALL_NM_STATE};

    static state_t loc_Wifi_Active_State[] = {ALL_WIFI_STATE(&network_states[NETWORK_WIFI_ACTIVE_STATE], 1)};
    static state_t loc_Eth_Active_State[] = {ALL_ETH_STATE(&network_states[NETWORK_ETH_ACTIVE_STATE], 1)

    };
    static state_t loc_Wifi_Configuring_State[] = {ALL_WIFI_CONFIGURING_STATE(&network_states[NETWORK_WIFI_CONFIGURING_ACTIVE_STATE], 1)};
    memcpy(&network_states, &loc_network_states, sizeof(network_states));
    memcpy(&Eth_Active_State, &loc_Eth_Active_State, sizeof(Eth_Active_State));
    memcpy(&Wifi_Active_State, &loc_Wifi_Active_State, sizeof(Wifi_Active_State));
    memcpy(&Wifi_Configuring_State, &loc_Wifi_Configuring_State, sizeof(Wifi_Configuring_State));
}
#undef ADD_ROOT
#undef ADD_ROOT_LEAF
#undef ADD_LEAF
static void network_handle_got_ip(network_event_t trigger, ip_event_got_ip_t* event_data) {
    esp_netif_ip_info_t* ip_info = NULL;
    ip_info = &event_data->ip_info;
    ESP_LOGI(TAG, "Got an IP address from interface %s. IP=" IPSTR ", Gateway=" IPSTR ", NetMask=" IPSTR ", %s",
        trigger == EN_ETH_GOT_IP ? "Eth" : "Wifi", IP2STR(&ip_info->ip), IP2STR(&ip_info->gw), IP2STR(&ip_info->netmask),
        event_data->ip_changed ? "Address was changed" : "Address unchanged");
}
#define HANDLE_GLOBAL_EVENT(m)                                                                                                                       \
    if (handle_global_event(m) == EVENT_HANDLED) return EVENT_HANDLED;

static void network_connect_active_ssid(state_machine_t* const State_Machine) {
    network_t* const nm = (network_t*)State_Machine;
    esp_err_t err = network_wifi_connect_active_ssid();
    if (err != ESP_OK) {
        nm->wifi_connected = false;

        if (err == ESP_ERR_NOT_FOUND) {
            network_async_fail();
        } else {
            ESP_LOGE(TAG, "Oups.  Something went wrong while trying to connect to the active ssid!");
            ESP_LOGD(TAG, "Checking if ethernet interface is connected");
            if (network_is_interface_connected(nm->eth_netif)) {
                ESP_LOGD(TAG, "Ethernet connection is found.  Try to fallback there");
                network_async(EN_ETHERNET_FALLBACK);
            } else {
                // returning to AP mode
                nm->STA_duration = nm->sta_polling_min_ms;
                ESP_LOGD(TAG, "No ethernet and no wifi configured. Go to configuration mode");
                network_async_configure();
            }
        }
    } else {
        nm->STA_duration = nm->sta_polling_min_ms;
        /* create timer for background STA connection */
        network_set_timer(nm->STA_duration, "Wifi Polling timeout");
    }
}

void initialize_network_handlers(state_machine_t* state_machine) { NETWORK_INSTANTIATED_STATE_handler(state_machine); }
static state_machine_result_t handle_global_event(state_machine_t* state_machine) {
    network_t* net_sm = ((network_t*)state_machine);
    esp_err_t err = ESP_OK;
    state_machine_result_t result = EVENT_UN_HANDLED;
    ESP_LOGD(TAG, "Processing event %s", network_event_to_string(net_sm->Machine.Event));
    switch (net_sm->Machine.Event) {
    case EN_UPDATE_STATUS:
        // handle the event, but don't swicth
        // todo: fix this
        // network_status_update_basic_info();
        return EVENT_HANDLED;
        /* code */
        break;
    case EN_REMOVE:
        if (net_sm->event_parameters->ctx.credentials.ssid && strlen(net_sm->event_parameters->ctx.credentials.ssid) > 0) {
            ESP_LOGD(TAG, "Deleting ssid credentials for %s", net_sm->event_parameters->ctx.credentials.ssid);
            result = network_wifi_remove_ssid(net_sm->event_parameters->ctx.credentials.ssid) == ESP_OK ? EVENT_HANDLED : EVENT_UN_HANDLED;
            FREE_AND_NULL(net_sm->event_parameters->ctx.credentials.ssid);
        }
        return result;
        break;
    case EN_ADD:
        if (net_sm->event_parameters->ctx.credentials.ssid && strlen(net_sm->event_parameters->ctx.credentials.ssid) > 0) {
            ESP_LOGD(TAG, "Adding ssid credentials for %s, password %s", net_sm->event_parameters->ctx.credentials.ssid,
                STR_OR_BLANK(net_sm->event_parameters->ctx.credentials.password));
            result =
                network_wifi_add_ssid(net_sm->event_parameters->ctx.credentials.ssid, net_sm->event_parameters->ctx.credentials.password) == ESP_OK
                    ? EVENT_HANDLED
                    : EVENT_UN_HANDLED;
            FREE_AND_NULL(net_sm->event_parameters->ctx.credentials.ssid);
            FREE_AND_NULL(net_sm->event_parameters->ctx.credentials.password);
        } else {
            ESP_LOGE(TAG, "Invalid ssid for event EN_ADD");
        }
        return result;
        break;
    case EN_REBOOT:
        ESP_LOGD(TAG, "Called for reboot type %d", net_sm->event_parameters->ctx.rtype);
        switch (net_sm->event_parameters->ctx.rtype) {
        case OTA:
            ESP_LOGD(TAG, " Calling guided_restart_ota.");
            guided_restart_ota();
            break;
        case RECOVERY:
            ESP_LOGD(TAG, " Calling guided_factory.");
            guided_factory();
            break;
        case RESTART:
            ESP_LOGD(TAG, " Calling simple_restart.");
            simple_restart();
            break;

        default:
            break;
        }
        // If configuratin could not be locked because of pending events,
        // another reboot event will be queued. So in the meantime
        // consider this event as handled
        return EVENT_HANDLED;
        break;
    case EN_REBOOT_URL:
        if (net_sm->event_parameters->ctx.strval) {
            start_ota(net_sm->event_parameters->ctx.strval, NULL, 0);
            FREE_AND_NULL(net_sm->event_parameters->ctx.strval);
        }
        return EVENT_UN_HANDLED;
        break;
    case EN_COMMIT_CHANGES:
        config_commit_protowrapper((void*)net_sm->event_parameters->ctx.strval);
        return EVENT_HANDLED;
        break;
    case EN_EXECUTE_CALLBACK:
        ESP_LOGD(TAG, "Executing Callback");
        if (!net_sm->event_parameters->ctx.cb_ctx.cb && !net_sm->event_parameters->ctx.cb_ctx.ret_cb) {
            ESP_LOGE(TAG, "Invalid callback");
            return EVENT_UN_HANDLED;
        } else if (net_sm->event_parameters->ctx.cb_ctx.cb) {
            ESP_LOGD(TAG, "Executing Callback with no return value");
            net_sm->event_parameters->ctx.cb_ctx.cb(net_sm->event_parameters->ctx.cb_ctx.ctx);
            ESP_LOGD(TAG, "Done executing callback");
            return EVENT_HANDLED;
        } else if (net_sm->event_parameters->ctx.cb_ctx.ret_cb) {
            ESP_LOGD(TAG, "Executing Callback with return value");
            err = net_sm->event_parameters->ctx.cb_ctx.ret_cb(net_sm->event_parameters->ctx.cb_ctx.ctx);
            if (err != ESP_OK) {
                ESP_LOGE(TAG, "Error processing event");
                return EVENT_UN_HANDLED;
            }
            ESP_LOGD(TAG, "Done executing callback");
            return EVENT_HANDLED;
        }
        break;

    default:
        break;
    }

    return EVENT_UN_HANDLED;
}

/*********************************************************************************************
 * INSTANTIATED_STATE
 */
static state_machine_result_t NETWORK_INSTANTIATED_STATE_entry_handler(state_machine_t* const State_Machine) {
    network_handler_entry_print(State_Machine, true);
    NETWORK_EXECUTE_CB(State_Machine);
    network_handler_entry_print(State_Machine, false);
    return EVENT_HANDLED;
}
static state_machine_result_t NETWORK_INSTANTIATED_STATE_handler(state_machine_t* const State_Machine) {
    network_handler_print(State_Machine, true);
    state_machine_result_t result = EVENT_UN_HANDLED;
    network_t* const nm = (network_t*)State_Machine;
    State_Machine->State = &network_states[NETWORK_INSTANTIATED_STATE];
    State_Machine->Event = EN_START;
    nm->sta_polling_max_ms = (platform && platform->net.sta_polling_max_s > 0 ? platform->net.sta_polling_max_s : 600) * 1000;
    nm->ap_duration_ms = (platform && platform->net.ap_duration_s > 0 ? platform->net.ap_duration_s : 20) * 1000;
    nm->sta_polling_min_ms = (platform && platform->net.sta_polling_min_s > 0 ? platform->net.sta_polling_min_s : 15) * 1000;
    nm->eth_link_down_reboot_ms = (platform && platform->dev.eth.common.ethtmout_s > 0 ? platform->dev.eth.common.ethtmout_s : 30) * 1000;
    nm->dhcp_timeout = (platform && platform->net.dhcp_tmout_s > 0 ? platform->net.dhcp_tmout_s : 30) * 1000;
    ESP_LOGI(TAG,
        "Network manager configuration: polling max %d, polling min %d, ap delay %d, dhcp timeout "
        "%d, eth timeout %d",
        nm->sta_polling_max_ms, nm->sta_polling_min_ms, nm->ap_duration_ms, nm->dhcp_timeout, nm->eth_link_down_reboot_ms);
    HANDLE_GLOBAL_EVENT(State_Machine);
    #ifndef TESTPROJECT
    if(!platform){
        ESP_LOGE(TAG,"Configuration not initialized.");
    }
    else
    {
        if (platform && State_Machine->Event == EN_START) {
            result = local_traverse_state(State_Machine, &network_states[NETWORK_INITIALIZING_STATE], __FUNCTION__);
        }
    }    
    #else 
    ESP_LOGI(TAG,"network message ignored in test mode");
    result= EVENT_HANDLED;
    #endif

    network_handler_print(State_Machine, false);
    return result;
}
static state_machine_result_t NETWORK_INSTANTIATED_STATE_exit_handler(state_machine_t* const State_Machine) {
    network_exit_handler_print(State_Machine, true);
    network_exit_handler_print(State_Machine, false);
    return EVENT_HANDLED;
}

/*********************************************************************************************
 * INITIALIZING_STATE
 */
static state_machine_result_t NETWORK_INITIALIZING_STATE_entry_handler(state_machine_t* const State_Machine) {
    network_handler_entry_print(State_Machine, true);
    // Initialize nvs; this is needed by the wifi driver
    ESP_LOGI(TAG, "Initializing flash nvs ");
    esp_err_t err = nvs_flash_init();
    if (err == ESP_ERR_NVS_NO_FREE_PAGES || err == ESP_ERR_NVS_NEW_VERSION_FOUND) {
        ESP_LOGW(TAG, "%s. Erasing nvs flash", esp_err_to_name(err));
        ESP_ERROR_CHECK(nvs_flash_erase());
        err = nvs_flash_init();
    }
    network_wifi_global_init();
    esp_netif_init();
    ESP_ERROR_CHECK(esp_event_loop_create_default());
    init_network_status();
    esp_event_handler_register(IP_EVENT, ESP_EVENT_ANY_ID, &network_ip_event_handler, NULL);
    // send a message to start the connections
    http_server_start();
    NETWORK_EXECUTE_CB(State_Machine);
    network_handler_entry_print(State_Machine, false);
    return EVENT_HANDLED;
}

static state_machine_result_t NETWORK_INITIALIZING_STATE_handler(state_machine_t* const State_Machine) {

    network_handler_print(State_Machine, true);
    state_machine_result_t result = EVENT_UN_HANDLED;
    HANDLE_GLOBAL_EVENT(State_Machine);
    switch (State_Machine->Event) {
    case EN_START:
        if (network_is_wifi_prioritized()) {
            ESP_LOGI(TAG, "WiFi connection is prioritized. Starting WiFi");
            result = local_traverse_state(State_Machine, &Wifi_Active_State[WIFI_INITIALIZING_STATE], __FUNCTION__);
        } else if (is_recovery_running) {
            ESP_LOGI(TAG, "Running recovery. Skipping ethernet, starting WiFi");
            result = local_traverse_state(State_Machine, &Wifi_Active_State[WIFI_INITIALIZING_STATE], __FUNCTION__);
        } else {
            result = local_traverse_state(State_Machine, &Eth_Active_State[ETH_STARTING_STATE], __FUNCTION__);
        }
        break;
    default:
        result = EVENT_UN_HANDLED;
    }
    network_handler_print(State_Machine, false);
    return result;
}
static state_machine_result_t NETWORK_INITIALIZING_STATE_exit_handler(state_machine_t* const State_Machine) {
    network_exit_handler_print(State_Machine, true);
    network_exit_handler_print(State_Machine, false);
    return EVENT_HANDLED;
}

/*********************************************************************************************
 * ETH_STARTING_STATE
 */
static state_machine_result_t ETH_STARTING_STATE_entry_handler(state_machine_t* const State_Machine) {
    network_handler_entry_print(State_Machine, true);
    ESP_LOGD(TAG, "Looking for ethernet Interface");
    network_t* const nm = (network_t*)State_Machine;
    init_network_ethernet();
    if (!network_ethernet_enabled()) {
        network_async_fail();
    } else {
        nm->eth_netif = network_ethernet_get_interface();
    }
    NETWORK_EXECUTE_CB(State_Machine);
    network_handler_entry_print(State_Machine, false);
    return EVENT_HANDLED;
}

static state_machine_result_t ETH_STARTING_STATE_handler(state_machine_t* const State_Machine) {
    state_machine_result_t result = EVENT_HANDLED;
    network_handler_print(State_Machine, true);
    HANDLE_GLOBAL_EVENT(State_Machine);
    switch (State_Machine->Event) {
    case EN_FAIL:
        result = local_traverse_state(State_Machine, &Wifi_Active_State[WIFI_INITIALIZING_STATE], __FUNCTION__);
        break;
    case EN_SUCCESS:
        result = local_traverse_state(State_Machine, &network_states[NETWORK_ETH_ACTIVE_STATE], __FUNCTION__);
        break;
    default:
        ESP_LOGE(TAG, "No handler");
        result = EVENT_UN_HANDLED;
    }
    network_handler_print(State_Machine, false);
    return result;
}
static state_machine_result_t ETH_STARTING_STATE_exit_handler(state_machine_t* const State_Machine) {
    network_exit_handler_print(State_Machine, true);
    network_exit_handler_print(State_Machine, false);
    return EVENT_HANDLED;
}

/*********************************************************************************************
 * NETWORK_ETH_ACTIVE_STATE
 */
static state_machine_result_t NETWORK_ETH_ACTIVE_STATE_entry_handler(state_machine_t* const State_Machine) {
    network_handler_entry_print(State_Machine, true);
    network_t* const nm = (network_t*)State_Machine;
    ESP_LOGD(TAG,"Entering ETH Active state. Setting timer");
    network_set_timer(nm->eth_link_down_reboot_ms, "Ethernet link not detected");
    ESP_LOGD(TAG,"Entering ETH Active state. Executing callback(s)");
    NETWORK_EXECUTE_CB(State_Machine);
    network_handler_entry_print(State_Machine, false);
    return EVENT_HANDLED;
}
static state_machine_result_t NETWORK_ETH_ACTIVE_STATE_handler(state_machine_t* const State_Machine) {
    network_handler_print(State_Machine, true);
    state_machine_result_t result = EVENT_UN_HANDLED;
    network_t* const nm = (network_t*)State_Machine;

    switch (State_Machine->Event) {
    case EN_CONNECT_NEW:
        result = local_traverse_state(State_Machine, &Eth_Active_State[ETH_CONNECTING_NEW_STATE], __FUNCTION__);
        break;
    case EN_LINK_UP:
        result = local_traverse_state(State_Machine, &Eth_Active_State[ETH_ACTIVE_LINKUP_STATE], __FUNCTION__);
        break;
    case EN_LINK_DOWN:
        result = local_traverse_state(State_Machine, &Eth_Active_State[ETH_ACTIVE_LINKDOWN_STATE], __FUNCTION__);
        break;
    case EN_ETH_GOT_IP:
        network_handle_got_ip(State_Machine->Event, nm->event_parameters->ctx.got_ip_event_data);
        FREE_AND_NULL(nm->event_parameters->ctx.got_ip_event_data);
        result = local_traverse_state(State_Machine, &Eth_Active_State[ETH_ACTIVE_CONNECTED_STATE], __FUNCTION__);
        break;
    case EN_ETHERNET_FALLBACK:
        result = local_traverse_state(State_Machine, &Eth_Active_State[ETH_ACTIVE_CONNECTED_STATE], __FUNCTION__);
        break;
    case EN_TIMER:
        ESP_LOGW(TAG, "Timeout %s. Rebooting to wifi", STR_OR_ALT(nm->timer_tag, "Ethernet link not detected"));
        network_prioritize_wifi(true);
        simple_restart();
        // result= local_traverse_state(State_Machine,
        // &Wifi_Active_State[WIFI_INITIALIZING_STATE],__FUNCTION__);
        break;
    case EN_SCAN:
        ESP_LOGW(TAG, "Wifi  scan cannot be executed in this state");
        // todo: fix this!
        //  network_wifi_built_known_ap_list();
        result = EVENT_HANDLED;
        break;
    case EN_DELETE: {
        ESP_LOGD(TAG, "WiFi disconnected by user");
        network_wifi_clear_config();
        network_status_update_ip_info(sys_status_reasons_R_USER_DISCONNECT);

        result = EVENT_HANDLED;
    } break;
    default:
        HANDLE_GLOBAL_EVENT(State_Machine);
        result = EVENT_UN_HANDLED;
    }
    network_handler_print(State_Machine, false);
    return result;
}
static state_machine_result_t NETWORK_ETH_ACTIVE_STATE_exit_handler(state_machine_t* const State_Machine) {
    network_exit_handler_print(State_Machine, true);
    network_set_timer(0, NULL);
    network_exit_handler_print(State_Machine, false);
    return EVENT_HANDLED;
}

/*********************************************************************************************
 * ETH_CONNECTING_NEW_STATE
 */
static state_machine_result_t ETH_CONNECTING_NEW_STATE_entry_handler(state_machine_t* const State_Machine) {
    network_t* const nm = (network_t*)State_Machine;
    network_handler_entry_print(State_Machine, true);
    network_start_stop_dhcp_client(nm->wifi_netif, true);
    network_wifi_connect(nm->event_parameters->ctx.credentials.ssid, nm->event_parameters->ctx.credentials.password);
    FREE_AND_NULL(nm->event_parameters->ctx.credentials.ssid);
    FREE_AND_NULL(nm->event_parameters->ctx.credentials.password);
    NETWORK_EXECUTE_CB(State_Machine);
    network_handler_entry_print(State_Machine, false);
    return EVENT_HANDLED;
}
static state_machine_result_t ETH_CONNECTING_NEW_STATE_handler(state_machine_t* const State_Machine) {
    HANDLE_GLOBAL_EVENT(State_Machine);
    network_handler_print(State_Machine, true);
    state_machine_result_t result = EVENT_HANDLED;
    network_t* const nm = (network_t*)State_Machine;

    switch (State_Machine->Event) {
    case EN_GOT_IP:
        network_handle_got_ip(State_Machine->Event, nm->event_parameters->ctx.got_ip_event_data);
        FREE_AND_NULL(nm->event_parameters->ctx.got_ip_event_data);
        result = local_traverse_state(State_Machine, &network_states[WIFI_CONNECTED_STATE], __FUNCTION__);
        break;
    case EN_LOST_CONNECTION:
        network_status_update_ip_info(sys_status_reasons_R_FAILED_ATTEMPT);
        messaging_post_message(MESSAGING_ERROR, MESSAGING_CLASS_SYSTEM, "Unable to connect to new WiFi access point.");
        // no existing configuration, or wifi wasn't the active connection when connection
        // attempt was made
        network_async(EN_ETHERNET_FALLBACK);
        result = EVENT_HANDLED;
        break;

    default:
        result = EVENT_UN_HANDLED;
    }
    network_handler_print(State_Machine, false);
    return result;
}
static state_machine_result_t ETH_CONNECTING_NEW_STATE_exit_handler(state_machine_t* const State_Machine) {
    network_exit_handler_print(State_Machine, true);
    network_set_timer(0, NULL);
    network_exit_handler_print(State_Machine, false);
    return EVENT_HANDLED;
}

/*********************************************************************************************
 * ETH_ACTIVE_LINKDOWN
 */
static state_machine_result_t ETH_ACTIVE_LINKDOWN_STATE_entry_handler(state_machine_t* const State_Machine) {
    network_handler_entry_print(State_Machine, true);
    network_t* const nm = (network_t*)State_Machine;
    network_set_timer(nm->eth_link_down_reboot_ms, "Ethernet link down");
    NETWORK_EXECUTE_CB(State_Machine);
    messaging_post_message(MESSAGING_WARNING, MESSAGING_CLASS_SYSTEM, "Ethernet link down.");
    network_handler_entry_print(State_Machine, false);
    return EVENT_HANDLED;
}
static state_machine_result_t ETH_ACTIVE_LINKDOWN_STATE_handler(state_machine_t* const State_Machine) {
    network_handler_print(State_Machine, true);
    HANDLE_GLOBAL_EVENT(State_Machine);
    network_handler_print(State_Machine, false);
    return EVENT_UN_HANDLED;
}
static state_machine_result_t ETH_ACTIVE_LINKDOWN_STATE_exit_handler(state_machine_t* const State_Machine) {
    network_exit_handler_print(State_Machine, true);
    network_set_timer(0, NULL);
    network_exit_handler_print(State_Machine, false);

    return EVENT_HANDLED;
}

/*********************************************************************************************
 * ETH_ACTIVE_LINKUP_STATE
 */
static state_machine_result_t ETH_ACTIVE_LINKUP_STATE_entry_handler(state_machine_t* const State_Machine) {
    network_handler_entry_print(State_Machine, true);
    network_t* const nm = (network_t*)State_Machine;
    network_set_timer(nm->dhcp_timeout, "DHCP timeout");
    NETWORK_EXECUTE_CB(State_Machine);
    messaging_post_message(MESSAGING_INFO, MESSAGING_CLASS_SYSTEM, "Ethernet link up.");
    network_handler_entry_print(State_Machine, false);
    return EVENT_HANDLED;
}
static state_machine_result_t ETH_ACTIVE_LINKUP_STATE_handler(state_machine_t* const State_Machine) {
    state_machine_result_t result = EVENT_UN_HANDLED;
    network_handler_print(State_Machine, true);
    HANDLE_GLOBAL_EVENT(State_Machine);
    network_handler_print(State_Machine, false);
    return result;
}
static state_machine_result_t ETH_ACTIVE_LINKUP_STATE_exit_handler(state_machine_t* const State_Machine) {
    network_exit_handler_print(State_Machine, true);
    network_exit_handler_print(State_Machine, false);
    return EVENT_HANDLED;
}

/*********************************************************************************************
 * WIFI_UP_STATE
 */
static state_machine_result_t NETWORK_WIFI_ACTIVE_STATE_entry_handler(state_machine_t* const State_Machine) {
    network_handler_entry_print(State_Machine, true);
    NETWORK_EXECUTE_CB(State_Machine);
    network_handler_entry_print(State_Machine, false);
    return EVENT_HANDLED;
}
static state_machine_result_t NETWORK_WIFI_ACTIVE_STATE_handler(state_machine_t* const State_Machine) {
    HANDLE_GLOBAL_EVENT(State_Machine);
    network_handler_print(State_Machine, true);
    state_machine_result_t result = EVENT_UN_HANDLED;
    network_t* const nm = (network_t*)State_Machine;
    switch (State_Machine->Event) {
    case EN_LINK_UP:
        ESP_LOGW(TAG, "Ethernet link up in wifi mode");
        break;
    case EN_ETH_GOT_IP:
        network_handle_got_ip(State_Machine->Event, nm->event_parameters->ctx.got_ip_event_data);
        FREE_AND_NULL(nm->event_parameters->ctx.got_ip_event_data);
        network_interface_coexistence(State_Machine);
        break;
    case EN_GOT_IP:
        network_handle_got_ip(State_Machine->Event, nm->event_parameters->ctx.got_ip_event_data);
        FREE_AND_NULL(nm->event_parameters->ctx.got_ip_event_data);

        network_status_update_ip_info(sys_status_reasons_R_CONNECTION_OK);
        result = local_traverse_state(State_Machine, &Wifi_Active_State[WIFI_CONNECTED_STATE], __FUNCTION__);
        break;
    case EN_SCAN:
        if (network_wifi_start_scan() == ESP_OK) {
            result = EVENT_HANDLED;
        }
        break;
    case EN_SCAN_DONE:
        if (wifi_scan_done() == ESP_OK) {
            result = EVENT_HANDLED;
        }
        network_async_success();
        break;
    case EN_CONNECT_NEW:
        result = local_traverse_state(State_Machine, &Wifi_Active_State[WIFI_CONNECTING_NEW_STATE], __FUNCTION__);
        break;
    case EN_DELETE:
        result = local_traverse_state(State_Machine, &Wifi_Active_State[WIFI_USER_DISCONNECTED_STATE], __FUNCTION__);
        break;

    case EN_ETHERNET_FALLBACK:
        result = local_traverse_state(State_Machine, &Eth_Active_State[ETH_ACTIVE_CONNECTED_STATE], __FUNCTION__);
        break;
    default:
        break;
    }
    network_handler_print(State_Machine, false);
    return result;
}
static state_machine_result_t NETWORK_WIFI_ACTIVE_STATE_exit_handler(state_machine_t* const State_Machine) {
    network_exit_handler_print(State_Machine, true);
    network_exit_handler_print(State_Machine, false);
    return EVENT_HANDLED;
}

/*********************************************************************************************
 * WIFI_INITIALIZING_STATE
 */
static state_machine_result_t WIFI_INITIALIZING_STATE_entry_handler(state_machine_t* const State_Machine) {
    network_t* const nm = (network_t*)State_Machine;
    network_handler_entry_print(State_Machine, true);
    if (!nm->wifi_netif) {
        nm->wifi_netif = network_wifi_start();
    }
    if (!is_wifi_up()) {
        messaging_post_message(MESSAGING_WARNING, MESSAGING_CLASS_SYSTEM, "Wifi not started. Load Configuration");
        return EVENT_UN_HANDLED;
    }
    if (network_wifi_get_known_count() > 0) {
        ESP_LOGI(TAG, "Existing wifi config found. Attempting to connect.");
        network_async_success();
    } else {
        /* no wifi saved: start soft AP! This is what should happen during a first run */
        ESP_LOGW(TAG, "No saved wifi. Starting AP configuration mode.");
        network_async_configure();
    }
    NETWORK_EXECUTE_CB(State_Machine);
    network_handler_entry_print(State_Machine, false);
    return EVENT_HANDLED;
}

static state_machine_result_t WIFI_INITIALIZING_STATE_handler(state_machine_t* const State_Machine) {
    HANDLE_GLOBAL_EVENT(State_Machine);
    network_handler_print(State_Machine, true);
    state_machine_result_t result = EVENT_HANDLED;
    switch (State_Machine->Event) {
    case EN_CONFIGURE:
        result = local_traverse_state(State_Machine, &Wifi_Configuring_State[WIFI_CONFIGURING_STATE], __FUNCTION__);
        break;
    case EN_SUCCESS:
        ESP_LOGI(TAG, "Traversing to Connecting state");
        result = local_traverse_state(State_Machine, &Wifi_Active_State[WIFI_CONNECTING_STATE], __FUNCTION__);
        break;
    default:
        result = EVENT_UN_HANDLED;
    }
    network_handler_print(State_Machine, false);
    return result;
}
static state_machine_result_t WIFI_INITIALIZING_STATE_exit_handler(state_machine_t* const State_Machine) {
    network_exit_handler_print(State_Machine, true);
    network_exit_handler_print(State_Machine, false);
    return EVENT_HANDLED;
}

/*********************************************************************************************
 * WIFI_CONFIGURING_ACTIVE_STATE
 */
static state_machine_result_t NETWORK_WIFI_CONFIGURING_ACTIVE_STATE_entry_handler(state_machine_t* const State_Machine) {
    network_handler_entry_print(State_Machine, true);
    network_t* const nm = (network_t*)State_Machine;
    nm->wifi_ap_netif = network_wifi_config_ap();
    dns_server_start(nm->wifi_ap_netif);
    network_wifi_start_scan();
    network_handler_entry_print(State_Machine, false);
    return EVENT_HANDLED;
}
static state_machine_result_t NETWORK_WIFI_CONFIGURING_ACTIVE_STATE_handler(state_machine_t* const State_Machine) {
    HANDLE_GLOBAL_EVENT(State_Machine);
    network_handler_print(State_Machine, true);
    network_t* const nm = (network_t*)State_Machine;

    state_machine_result_t result = EVENT_HANDLED;
    switch (State_Machine->Event) {
    case EN_SCAN:
        if (network_wifi_start_scan() == ESP_OK) {
            result = EVENT_HANDLED;
        }
        break;
    case EN_SCAN_DONE:
        ESP_LOGD(TAG, "Network configuration active, wifi scan completed");
        if (wifi_scan_done() == ESP_OK) {
            result = EVENT_HANDLED;
        }
        break;
    case EN_CONNECT_NEW:
        result = local_traverse_state(State_Machine, &Wifi_Configuring_State[WIFI_CONFIGURING_CONNECT_STATE], __FUNCTION__);
        break;
    case EN_LINK_UP:
        ESP_LOGW(TAG, "Ethernet link up in wifi mode");
        break;
    case EN_ETH_GOT_IP:
        network_handle_got_ip(State_Machine->Event, nm->event_parameters->ctx.got_ip_event_data);
        FREE_AND_NULL(nm->event_parameters->ctx.got_ip_event_data);
        network_interface_coexistence(State_Machine);
        break;
    default:
        result = EVENT_UN_HANDLED;
    }
    network_handler_print(State_Machine, false);
    return result;
}
static state_machine_result_t NETWORK_WIFI_CONFIGURING_ACTIVE_STATE_exit_handler(state_machine_t* const State_Machine) {
    network_exit_handler_print(State_Machine, true);
    /* bring down DNS hijack */
    ESP_LOGD(TAG, " Stopping DNS.");
    dns_server_stop();
    ESP_LOGD(TAG, "Changing wifi mode to STA.");
    network_wifi_set_sta_mode();
    network_exit_handler_print(State_Machine, false);

    return EVENT_HANDLED;
}

/*********************************************************************************************
 * WIFI_CONFIGURING_STATE
 */
static state_machine_result_t WIFI_CONFIGURING_STATE_entry_handler(state_machine_t* const State_Machine) {
    network_handler_entry_print(State_Machine, true);
    NETWORK_EXECUTE_CB(State_Machine);
    network_handler_entry_print(State_Machine, false);
    return EVENT_HANDLED;
}
static state_machine_result_t WIFI_CONFIGURING_STATE_handler(state_machine_t* const State_Machine) {
    network_handler_print(State_Machine, true);
    HANDLE_GLOBAL_EVENT(State_Machine);
    network_handler_print(State_Machine, false);
    return EVENT_UN_HANDLED;
}
static state_machine_result_t WIFI_CONFIGURING_STATE_exit_handler(state_machine_t* const State_Machine) {
    network_exit_handler_print(State_Machine, true);
    network_exit_handler_print(State_Machine, false);
    return EVENT_HANDLED;
}

/*********************************************************************************************
 * WIFI_CONFIGURING_CONNECT_STATE
 */
static state_machine_result_t WIFI_CONFIGURING_CONNECT_STATE_entry_handler(state_machine_t* const State_Machine) {
    network_t* const nm = (network_t*)State_Machine;
    network_handler_entry_print(State_Machine, true);
    network_start_stop_dhcp_client(nm->wifi_netif, true);
    network_wifi_connect(nm->event_parameters->ctx.credentials.ssid, nm->event_parameters->ctx.credentials.password);
    FREE_AND_NULL(nm->event_parameters->ctx.credentials.ssid);
    FREE_AND_NULL(nm->event_parameters->ctx.credentials.password);
    NETWORK_EXECUTE_CB(State_Machine);
    network_handler_entry_print(State_Machine, false);
    return EVENT_HANDLED;
}
static state_machine_result_t WIFI_CONFIGURING_CONNECT_STATE_handler(state_machine_t* const State_Machine) {
    HANDLE_GLOBAL_EVENT(State_Machine);
    network_handler_print(State_Machine, true);
    network_t* const nm = (network_t*)State_Machine;
    state_machine_result_t result = EVENT_HANDLED;
    switch (State_Machine->Event) {
    case EN_CONNECTED:
        result = EVENT_HANDLED;
        ESP_LOGI(TAG, "Wifi was connected. Waiting for IP address");
        network_set_timer(nm->dhcp_timeout, "DHCP Timeout");
        network_wifi_set_connected(true);
        break;
    case EN_GOT_IP:
        network_handle_got_ip(State_Machine->Event, nm->event_parameters->ctx.got_ip_event_data);
        FREE_AND_NULL(nm->event_parameters->ctx.got_ip_event_data);
        network_status_update_ip_info(sys_status_reasons_R_CONNECTION_OK);
        result = local_traverse_state(State_Machine, &Wifi_Configuring_State[WIFI_CONFIGURING_CONNECT_SUCCESS_STATE], __FUNCTION__);
        break;
    case EN_LOST_CONNECTION:
        if (nm->event_parameters->ctx.disconnected_event->reason == WIFI_REASON_ASSOC_LEAVE) {
            ESP_LOGI(TAG, "Wifi was disconnected from previous access point. Waiting to connect.");
        } else {
            network_status_update_ip_info(sys_status_reasons_R_FAILED_ATTEMPT);
            result = local_traverse_state(State_Machine, &Wifi_Configuring_State[WIFI_CONFIGURING_STATE], __FUNCTION__);
        }
        break;
    case EN_TIMER:
        ESP_LOGW(TAG, "Connection timeout.  (%s)", STR_OR_ALT(nm->timer_tag, "Unknown"));
        network_status_update_ip_info(sys_status_reasons_R_FAILED_ATTEMPT);
        result = local_traverse_state(State_Machine, &Wifi_Configuring_State[WIFI_CONFIGURING_STATE], __FUNCTION__);
        break;
    default:
        result = EVENT_UN_HANDLED;
    }
    network_handler_print(State_Machine, false);
    return result;
}
static state_machine_result_t WIFI_CONFIGURING_CONNECT_STATE_exit_handler(state_machine_t* const State_Machine) {
    network_exit_handler_print(State_Machine, true);

    FREE_AND_NULL(((network_t*)State_Machine)->event_parameters->ctx.disconnected_event);
    network_set_timer(0, NULL);
    network_exit_handler_print(State_Machine, false);
    return EVENT_HANDLED;
}

/*********************************************************************************************
 * WIFI_CONFIGURING_CONNECT_SUCCESS_STATE
 */
static state_machine_result_t WIFI_CONFIGURING_CONNECT_SUCCESS_STATE_entry_handler(state_machine_t* const State_Machine) {
    network_handler_entry_print(State_Machine, true);
    network_status_update_ip_info(sys_status_reasons_R_CONNECTION_OK);
    ESP_LOGD(TAG, "Saving wifi configuration.");
    // todo: fix this!
    // network_wifi_save_sta_config();
    NETWORK_EXECUTE_CB(State_Machine);
    network_handler_entry_print(State_Machine, false);
    return EVENT_HANDLED;
}
static state_machine_result_t WIFI_CONFIGURING_CONNECT_SUCCESS_STATE_handler(state_machine_t* const State_Machine) {
    network_handler_print(State_Machine, true);
    state_machine_result_t result = EVENT_HANDLED;
    network_t* const nm = (network_t*)State_Machine;
    switch (State_Machine->Event) {
    case EN_UPDATE_STATUS:
        // todo: fix this
        // network_status_update_basic_info();
        network_set_timer(nm->ap_duration_ms, "Access point teardown"); // set a timer to tear down the AP mode
        break;
    case EN_TIMER:
        // todo: fix this
        // network_status_update_basic_info();
        result = local_traverse_state(State_Machine, &Wifi_Active_State[WIFI_CONNECTED_STATE], __FUNCTION__);
        break;
    default:
        result = EVENT_UN_HANDLED;
    }
    // Process global handler at the end, since we want to overwrite
    // UPDATE_STATUS with our own logic above
    HANDLE_GLOBAL_EVENT(State_Machine);
    network_handler_print(State_Machine, false);
    return result;
}
static state_machine_result_t WIFI_CONFIGURING_CONNECT_SUCCESS_STATE_exit_handler(state_machine_t* const State_Machine) {
    network_exit_handler_print(State_Machine, true);
    network_set_timer(0, NULL);
    network_exit_handler_print(State_Machine, false);
    return EVENT_HANDLED;
}

/*********************************************************************************************
 * WIFI_CONNECTING_STATE
 */
static state_machine_result_t WIFI_CONNECTING_STATE_entry_handler(state_machine_t* const State_Machine) {
    network_t* const nm = (network_t*)State_Machine;
    network_handler_entry_print(State_Machine, true);
    nm->initial_retries = 0;
    network_start_stop_dhcp_client(nm->wifi_netif, true);
    network_connect_active_ssid(State_Machine);
    NETWORK_EXECUTE_CB(State_Machine);
    network_handler_entry_print(State_Machine, false);
    return EVENT_HANDLED;
}
static state_machine_result_t WIFI_CONNECTING_STATE_handler(state_machine_t* const State_Machine) {
    HANDLE_GLOBAL_EVENT(State_Machine);
    state_machine_result_t result = EVENT_HANDLED;
    network_t* const nm = (network_t*)State_Machine;
    network_handler_print(State_Machine, true);
    switch (State_Machine->Event) {
    case EN_CONNECTED:
        // nothing to do here. Let's wait for IP address
        break;
    case EN_TIMER:
        if (nm->initial_retries < (platform!=NULL && platform->net.max_initial_wifi_attempt>0?platform->net.max_initial_wifi_attempt:5)) {
            nm->initial_retries++;
            ESP_LOGD(TAG, " Retrying connection connection, %d/%d.", nm->initial_retries, platform->net.max_initial_wifi_attempt);
            ESP_LOGI(TAG, "Timer: %s ", STR_OR_ALT(nm->timer_tag, "Ethernet link not detected"));
            network_connect_active_ssid(State_Machine);
        } else {
        }
        break;
    case EN_LOST_CONNECTION:
        if (nm->event_parameters->ctx.disconnected_event->reason == WIFI_REASON_ASSOC_LEAVE ||
            nm->event_parameters->ctx.disconnected_event->reason == WIFI_REASON_AUTH_EXPIRE ||
            nm->event_parameters->ctx.disconnected_event->reason == WIFI_REASON_ASSOC_EXPIRE) {
            ESP_LOGI(TAG, "Wifi was disconnected from previous access point. Waiting to connect.");
        } else if (nm->event_parameters->ctx.disconnected_event->reason != WIFI_REASON_4WAY_HANDSHAKE_TIMEOUT) {
            network_status_update_ip_info(sys_status_reasons_R_FAILED_ATTEMPT);
            result = local_traverse_state(State_Machine, &Wifi_Configuring_State[WIFI_CONFIGURING_STATE], __FUNCTION__);
        }
        break;
    case EN_FAIL:
        // this would happen if there is no previously connected AP
        ESP_LOGD(TAG, "No active access point. switching to scan");
        result = local_traverse_state(State_Machine, &Wifi_Active_State[WIFI_CONNECTING_SCAN_STATE], __FUNCTION__);
        break;
    default:
        result = EVENT_UN_HANDLED;
    }
    network_handler_print(State_Machine, false);
    return result;
}
static state_machine_result_t WIFI_CONNECTING_STATE_exit_handler(state_machine_t* const State_Machine) {
    network_exit_handler_print(State_Machine, true);
    network_exit_handler_print(State_Machine, false);
    return EVENT_HANDLED;
}

/*********************************************************************************************
 * WIFI_CONNECTING_STATE
 */
static state_machine_result_t WIFI_CONNECTING_SCAN_STATE_entry_handler(state_machine_t* const State_Machine) {
    ESP_LOGD(TAG, "Entering Scan State");
    network_t* const nm = (network_t*)State_Machine;
    network_handler_entry_print(State_Machine, true);
    network_async_scan();
    NETWORK_EXECUTE_CB(State_Machine);
    network_handler_entry_print(State_Machine, false);
    return EVENT_HANDLED;
}
static state_machine_result_t WIFI_CONNECTING_SCAN_STATE_handler(state_machine_t* const State_Machine) {
    HANDLE_GLOBAL_EVENT(State_Machine);
    state_machine_result_t result = EVENT_HANDLED;
    network_handler_print(State_Machine, true);
    switch (State_Machine->Event) {
    case EN_SUCCESS:
        // scan completed, we can try to connect to a known AP now
        network_wifi_activate_strongest_ssid();
        result = local_switch_state(State_Machine, &Wifi_Active_State[WIFI_CONNECTING_STATE], __FUNCTION__);
        break;
    default:
        result = EVENT_UN_HANDLED;
    }
    network_handler_print(State_Machine, false);
    return result;
}
static state_machine_result_t WIFI_CONNECTING_SCAN_STATE_exit_handler(state_machine_t* const State_Machine) {
    network_exit_handler_print(State_Machine, true);
    network_exit_handler_print(State_Machine, false);
    return EVENT_HANDLED;
}

/*********************************************************************************************
 * WIFI_CONNECTING_NEW_STATE
 */
static state_machine_result_t WIFI_CONNECTING_NEW_STATE_entry_handler(state_machine_t* const State_Machine) {
    network_t* const nm = (network_t*)State_Machine;
    network_handler_entry_print(State_Machine, true);
    network_start_stop_dhcp_client(nm->wifi_netif, true);
    network_wifi_connect(nm->event_parameters->ctx.credentials.ssid, nm->event_parameters->ctx.credentials.password);
    FREE_AND_NULL(nm->event_parameters->ctx.credentials.ssid);
    FREE_AND_NULL(nm->event_parameters->ctx.credentials.password);
    NETWORK_EXECUTE_CB(State_Machine);
    network_handler_entry_print(State_Machine, false);
    return EVENT_HANDLED;
}
static state_machine_result_t WIFI_CONNECTING_NEW_STATE_handler(state_machine_t* const State_Machine) {
    HANDLE_GLOBAL_EVENT(State_Machine);
    network_handler_print(State_Machine, true);
    state_machine_result_t result = EVENT_HANDLED;
    network_t* const nm = (network_t*)State_Machine;

    switch (State_Machine->Event) {
    case EN_GOT_IP:
        network_handle_got_ip(State_Machine->Event, nm->event_parameters->ctx.got_ip_event_data);
        FREE_AND_NULL(nm->event_parameters->ctx.got_ip_event_data);

        network_status_update_ip_info(sys_status_reasons_R_CONNECTION_OK);
        result = local_traverse_state(State_Machine, &Wifi_Active_State[WIFI_CONNECTED_STATE], __FUNCTION__);
        break;
    case EN_CONNECTED:
        ESP_LOGD(TAG, "Successfully connected to the new access point. Waiting for IP Address");
        result = EVENT_HANDLED;
        break;
    case EN_LOST_CONNECTION:
        if (((network_t*)State_Machine)->event_parameters->ctx.disconnected_event->reason == WIFI_REASON_ASSOC_LEAVE) {
            ESP_LOGD(TAG, "Successfully disconnected from the existing access point. ");
            return EVENT_HANDLED;
        }
        ESP_LOGW(TAG, "Trying to connect failed");
        result = local_traverse_state(State_Machine, &Wifi_Active_State[WIFI_CONNECTING_NEW_FAILED_STATE], __FUNCTION__);
        break;

    default:
        result = EVENT_UN_HANDLED;
    }
    network_handler_print(State_Machine, false);
    return result;
}
static state_machine_result_t WIFI_CONNECTING_NEW_STATE_exit_handler(state_machine_t* const State_Machine) {
    network_exit_handler_print(State_Machine, true);
    network_set_timer(0, NULL);
    FREE_AND_NULL(((network_t*)State_Machine)->event_parameters->ctx.disconnected_event);
    network_exit_handler_print(State_Machine, false);

    return EVENT_HANDLED;
}

/*********************************************************************************************
 * WIFI_CONNECTING_NEW_FAILED_STATE
 */
static state_machine_result_t WIFI_CONNECTING_NEW_FAILED_STATE_entry_handler(state_machine_t* const State_Machine) {
    network_t* const nm = (network_t*)State_Machine;
    network_handler_entry_print(State_Machine, true);
    if (nm->wifi_connected) {
        // Wifi was already connected to an existing access point. Restore connection
        network_connect_active_ssid(State_Machine);
    }

    NETWORK_EXECUTE_CB(State_Machine);
    network_handler_entry_print(State_Machine, false);
    return EVENT_HANDLED;
}
static state_machine_result_t WIFI_CONNECTING_NEW_FAILED_STATE_handler(state_machine_t* const State_Machine) {
    HANDLE_GLOBAL_EVENT(State_Machine);
    network_handler_print(State_Machine, true);
    state_machine_result_t result = EVENT_HANDLED;
    network_t* const nm = (network_t*)State_Machine;

    switch (State_Machine->Event) {
    case EN_GOT_IP:
        network_handle_got_ip(State_Machine->Event, nm->event_parameters->ctx.got_ip_event_data);
        FREE_AND_NULL(nm->event_parameters->ctx.got_ip_event_data);

        network_status_update_ip_info(sys_status_reasons_R_FAILED_ATTEMPT_AND_RESTORE);
        result = local_traverse_state(State_Machine, &Wifi_Active_State[WIFI_CONNECTED_STATE], __FUNCTION__);
        break;
    case EN_CONNECTED:
        ESP_LOGD(TAG, "Successfully connected to the previous access point. Waiting for IP Address");
        result = EVENT_HANDLED;
        break;
    case EN_LOST_CONNECTION:
        network_status_update_ip_info(sys_status_reasons_R_FAILED_ATTEMPT);
        messaging_post_message(MESSAGING_ERROR, MESSAGING_CLASS_SYSTEM, "Unable to fall back to previous access point.");
        result = EVENT_HANDLED;
        break;

    default:
        result = EVENT_UN_HANDLED;
    }
    network_handler_print(State_Machine, false);
    return result;
}
static state_machine_result_t WIFI_CONNECTING_NEW_FAILED_STATE_exit_handler(state_machine_t* const State_Machine) {
    network_exit_handler_print(State_Machine, true);
    network_set_timer(0, NULL);
    FREE_AND_NULL(((network_t*)State_Machine)->event_parameters->ctx.disconnected_event);
    network_exit_handler_print(State_Machine, false);

    return EVENT_HANDLED;
}

/*********************************************************************************************
 * WIFI_CONNECTED_STATE
 */
static state_machine_result_t WIFI_CONNECTED_STATE_entry_handler(state_machine_t* const State_Machine) {
    network_t* const nm = (network_t*)State_Machine;
    network_handler_entry_print(State_Machine, true);
    ESP_LOGD(TAG,"Entered WIFI_CONNECTED_STATE ");
    nm->last_connected = esp_timer_get_time();
    // cancel timeout pulse
    network_set_timer(0, NULL);
    network_interface_coexistence(State_Machine);
    nm->wifi_connected = true;
    NETWORK_EXECUTE_CB(State_Machine);
    network_handler_entry_print(State_Machine, false);
    return EVENT_HANDLED;
}
static state_machine_result_t WIFI_CONNECTED_STATE_handler(state_machine_t* const State_Machine) {
    HANDLE_GLOBAL_EVENT(State_Machine);
    network_handler_print(State_Machine, true);
    state_machine_result_t result = EVENT_HANDLED;
    network_t* const nm = (network_t*)State_Machine;
    switch (State_Machine->Event) {
    case EN_LOST_CONNECTION:
        if (is_restarting()) {
            // ignore this as we're restarting
            return EVENT_HANDLED;
        }
        if (nm->event_parameters->ctx.disconnected_event->reason == WIFI_REASON_ASSOC_LEAVE) {
            ESP_LOGD(TAG, "User disconnected from wifi. Re-initializing connection");
            result = local_traverse_state(State_Machine, &Wifi_Active_State[WIFI_INITIALIZING_STATE], __FUNCTION__);
        } else {
            ESP_LOGD(TAG, "Lost connection for a reason other than disconnecting. ");
            result = local_traverse_state(State_Machine, &Wifi_Active_State[WIFI_LOST_CONNECTION_STATE], __FUNCTION__);
        }

        break;
    default:
        result = EVENT_UN_HANDLED;
        break;
    }
    network_handler_print(State_Machine, false);
    return result;
}
static state_machine_result_t WIFI_CONNECTED_STATE_exit_handler(state_machine_t* const State_Machine) {
    network_exit_handler_print(State_Machine, true);
    FREE_AND_NULL(((network_t*)State_Machine)->event_parameters->ctx.disconnected_event);
    network_exit_handler_print(State_Machine, false);
    return EVENT_HANDLED;
}

/*********************************************************************************************
 * WIFI_USER_DISCONNECTED_STATE
 */
static state_machine_result_t WIFI_USER_DISCONNECTED_STATE_entry_handler(state_machine_t* const State_Machine) {
    network_handler_entry_print(State_Machine, true);
    ESP_LOGD(TAG, " WiFi disconnected by user");
    network_wifi_clear_config();
    network_status_update_ip_info(sys_status_reasons_R_USER_DISCONNECT);
    NETWORK_EXECUTE_CB(State_Machine);
    network_handler_entry_print(State_Machine, false);
    return EVENT_HANDLED;
}
static state_machine_result_t WIFI_USER_DISCONNECTED_STATE_handler(state_machine_t* const State_Machine) {
    HANDLE_GLOBAL_EVENT(State_Machine);
    network_handler_print(State_Machine, true);
    state_machine_result_t result = EVENT_HANDLED;
    switch (State_Machine->Event) {
    case EN_LOST_CONNECTION:
        // this is a success! we're actually asking to disconnect
        result = local_traverse_state(State_Machine, &Wifi_Configuring_State[WIFI_CONFIGURING_STATE], __FUNCTION__);
        break;
    default:
        result = EVENT_UN_HANDLED;
    }
    network_handler_print(State_Machine, false);
    return result;
}
static state_machine_result_t WIFI_USER_DISCONNECTED_STATE_exit_handler(state_machine_t* const State_Machine) {
    network_exit_handler_print(State_Machine, true);
    network_exit_handler_print(State_Machine, false);
    return EVENT_HANDLED;
}

/*********************************************************************************************
 * WIFI_LOST_CONNECTION_STATE
 */
static state_machine_result_t WIFI_LOST_CONNECTION_STATE_entry_handler(state_machine_t* const State_Machine) {
    network_t* const nm = (network_t*)State_Machine;
    network_handler_entry_print(State_Machine, true);
    ESP_LOGE(TAG, " WiFi Connection lost.");
    messaging_post_message(MESSAGING_WARNING, MESSAGING_CLASS_SYSTEM, "WiFi Connection lost");
    network_status_update_ip_info(sys_status_reasons_R_LOST_CONNECTION);
    // todo: fix this!
    //  network_status_safe_reset_sta_ip_string();
    if (nm->last_connected > 0) nm->total_connected_time += ((esp_timer_get_time() - nm->last_connected) / (1000 * 1000));
    nm->last_connected = 0;
    nm->num_disconnect++;
    ESP_LOGW(TAG, " Wifi disconnected. Number of disconnects: %d, Average time connected: %d", nm->num_disconnect,
        nm->num_disconnect > 0 ? (nm->total_connected_time / nm->num_disconnect) : 0);
    if (nm->retries < (platform && platform->net.max_wifi_retry>0?platform->net.max_wifi_retry:5)) {
        nm->retries++;
        ESP_LOGD(TAG, " Retrying connection connection, %d/%d.", nm->retries, platform->net.max_wifi_retry);
        network_async(EN_CONNECT);
    } else {
        /* In this scenario the connection was lost beyond repair */
        nm->retries = 0;
        ESP_LOGD(TAG, "Checking if ethernet interface is connected");
        if (network_is_interface_connected(nm->eth_netif)) {
            ESP_LOGW(TAG, "Cannot connect to Wifi. Falling back to Ethernet ");
            network_async(EN_ETHERNET_FALLBACK);
        } else {
            network_status_update_ip_info(sys_status_reasons_R_LOST_CONNECTION);
            wifi_mode_t mode;
            ESP_LOGW(TAG, " All connect retry attempts failed.");

            /* put us in softAP mode first */
            esp_wifi_get_mode(&mode);
            if (WIFI_MODE_APSTA != mode) {
                nm->STA_duration = nm->sta_polling_min_ms;
                network_async_configure();
            } else if (nm->STA_duration < nm->sta_polling_max_ms) {
                nm->STA_duration *= 1.25;
            }

            /* keep polling for existing connection */
            network_set_timer(nm->STA_duration, "Wifi Polling timeout");
            ESP_LOGD(TAG, " STA search slow polling of %d", nm->STA_duration);
        }
    }

    NETWORK_EXECUTE_CB(State_Machine);
    network_handler_entry_print(State_Machine, false);
    return EVENT_HANDLED;
}
static state_machine_result_t WIFI_LOST_CONNECTION_STATE_handler(state_machine_t* const State_Machine) {
    HANDLE_GLOBAL_EVENT(State_Machine);
    network_t* const nm = (network_t*)State_Machine;
    state_machine_result_t result = EVENT_HANDLED;
    network_handler_print(State_Machine, true);
    switch (State_Machine->Event) {
    case EN_CONFIGURE:
        result = local_traverse_state(State_Machine, &Wifi_Configuring_State[WIFI_CONFIGURING_STATE], __FUNCTION__);
        break;
    case EN_TIMER:
        ESP_LOGI(TAG, "Timer: %s ", STR_OR_ALT(nm->timer_tag, "Lost connection"));
        result = local_traverse_state(State_Machine, &Wifi_Active_State[WIFI_LOST_CONNECTION_STATE], __FUNCTION__);
        break;
    case EN_CONNECT:
        result = local_traverse_state(State_Machine, &Wifi_Configuring_State[WIFI_CONNECTING_STATE], __FUNCTION__);
        break;
    default:
        result = EVENT_UN_HANDLED;
    }
    network_handler_print(State_Machine, false);
    return result;
}
static state_machine_result_t WIFI_LOST_CONNECTION_STATE_exit_handler(state_machine_t* const State_Machine) {
    network_exit_handler_print(State_Machine, true);
    FREE_AND_NULL(((network_t*)State_Machine)->event_parameters->ctx.disconnected_event);
    network_exit_handler_print(State_Machine, false);
    return EVENT_HANDLED;
}

/*********************************************************************************************
 * ETH_ACTIVE_CONNECTED_STATE
 */
static state_machine_result_t ETH_ACTIVE_CONNECTED_STATE_entry_handler(state_machine_t* const State_Machine) {
    network_t* const nm = (network_t*)State_Machine;
    network_handler_entry_print(State_Machine, true);
    network_status_update_ip_info(sys_status_reasons_R_ETHERNET_CONNECTED);
    nm->ethernet_connected = true;
    NETWORK_EXECUTE_CB(State_Machine);
    network_handler_entry_print(State_Machine, false);
    return EVENT_HANDLED;
}
static state_machine_result_t ETH_ACTIVE_CONNECTED_STATE_handler(state_machine_t* const State_Machine) {
    HANDLE_GLOBAL_EVENT(State_Machine);
    state_machine_result_t result = EVENT_HANDLED;
    network_handler_print(State_Machine, true);
    switch (State_Machine->Event) {
    case EN_TIMER:
        ESP_LOGD(TAG, "Ignoring ethernet link up timer check");
        result = EVENT_HANDLED;
        break;
    default:
        result = EVENT_UN_HANDLED;
    }
    network_handler_print(State_Machine, false);
    return result;
}
static state_machine_result_t ETH_ACTIVE_CONNECTED_STATE_exit_handler(state_machine_t* const State_Machine) {
    network_exit_handler_print(State_Machine, true);
    network_exit_handler_print(State_Machine, false);
    return EVENT_HANDLED;
}

static state_machine_result_t local_switch_state(state_machine_t* state_machine, const state_t* const target_state, const char* caller) {
    const state_t* source = state_machine->State;
    NETWORK_PRINT_TRANSITION(true, "BEGIN SWITCH", ((network_t*)state_machine)->source_state, target_state, state_machine->Event, true, caller);
    state_machine_result_t result = switch_state(state_machine, target_state);
    NETWORK_PRINT_TRANSITION(false, "BEGIN SWITCH", ((network_t*)state_machine)->source_state, target_state, state_machine->Event, true, caller);
    ((network_t*)state_machine)->source_state = source;
    return result;
}
static state_machine_result_t local_traverse_state(state_machine_t* const state_machine, const state_t* const target_state, const char* caller) {
    const state_t* source = state_machine->State;
    NETWORK_PRINT_TRANSITION(true, "BEGIN TRAVERSE", ((network_t*)state_machine)->source_state, target_state, state_machine->Event, true, caller);
    state_machine_result_t result = traverse_state(state_machine, target_state);
    NETWORK_PRINT_TRANSITION(false, "END TRAVERSE", ((network_t*)state_machine)->source_state, target_state, state_machine->Event, true, caller);
    ((network_t*)state_machine)->source_state = source;
    return result;
}

static void network_interface_coexistence(state_machine_t* state_machine) {
    // this function is called whenever both wifi and ethernet are
    // found to be active at the same time
    network_t* nm = (network_t*)state_machine;
    if (nm->wifi_connected && state_machine->Event == EN_ETH_GOT_IP) {
        network_prioritize_wifi(false);
        if (platform && !platform->net.eth_boot) {
            ESP_LOGW(TAG, "Option eth_reboot set to reboot when ethernet is connected. Rebooting");
            simple_restart();
        } else {
            ESP_LOGW(TAG, "Option eth_reboot set to not reboot when ethernet is connected. Using "
                          "Wifi interface until next reboot");
        }
    } else if (get_root(state_machine->State)->Id == NETWORK_ETH_ACTIVE_STATE) {
        messaging_post_message(MESSAGING_WARNING, MESSAGING_CLASS_SYSTEM, "Wifi Connected with Ethernet active. System reload needed");
        simple_restart();
    }
}