andry/EMS-ESP32
1
0
Fork 0
mirror of https://github.com/emsesp/EMS-ESP32.git synced 2026-05-04 21:15:52 +00:00
Code Issues Packages Projects Releases Wiki Activity
Files
ca94e3749574e904799a7a02fe670ebf1ae9c313
EMS-ESP32/src/core/network.cpp

792 lines
29 KiB
C++
Raw Blame History

/*
* EMS-ESP - https://github.com/emsesp/EMS-ESP
* Copyright 2020-2025 emsesp.org
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "network.h"
#include "emsesp.h"
namespace emsesp {
uuid::log::Logger Network::logger_{F_(network), uuid::log::Facility::KERN};
void Network::begin() {
#ifndef EMSESP_STANDALONE
// pull all settings and store locally
EMSESP::esp32React.getNetworkSettingsService()->read([&](NetworkSettings & settings) {
enableMDNS_ = settings.enableMDNS;
staticIPConfig_ = settings.staticIPConfig;
localIP_ = settings.localIP;
gatewayIP_ = settings.gatewayIP;
subnetMask_ = settings.subnetMask;
dnsIP1_ = settings.dnsIP1;
dnsIP2_ = settings.dnsIP2;
hostname_ = settings.hostname;
ssid_ = settings.ssid;
password_ = settings.password;
bandwidth20_ = settings.bandwidth20;
nosleep_ = settings.nosleep;
tx_power_ = settings.tx_power;
bssid_ = settings.bssid;
});
// read Ethernet settings
EMSESP::webSettingsService.read([&](WebSettings & settings) {
phy_type_ = settings.phy_type;
eth_power_ = settings.eth_power;
eth_phy_addr_ = settings.eth_phy_addr;
eth_clock_mode_ = settings.eth_clock_mode;
});
// get Access Point settings
EMSESP::esp32React.getAPSettingsService()->read([&](APSettings & settings) {
ap_provisionMode_ = settings.provisionMode;
ap_ssid_ = settings.ssid;
ap_password_ = settings.password;
ap_channel_ = settings.channel;
ap_ssid_hidden_ = settings.ssidHidden;
ap_max_clients_ = settings.maxClients;
ap_localIP_ = settings.localIP;
ap_gatewayIP_ = settings.gatewayIP;
ap_subnetMask_ = settings.subnetMask;
});
// Initialise WiFi - we only do this once, when the network service is started.
// WiFi.mode(WIFI_OFF); // we want the device to come up in opmode=0 (WIFI_OFF), which is not the default after a flash erase
// pick the first usable phase based on what's actually configured on this device.
// done up-front so the early-return paths below still leave us in a sane phase
// (e.g. on a board with no SSID and no Ethernet PHY we want to land in AP without
// burning a 4-tick Ethernet timeout first)
phase_ = initialPhase();
// if Wifi is disabled, or with no SSID, don't initialise WiFi
if (ssid_.isEmpty()) {
WiFi.mode(WIFI_OFF);
return;
}
WiFi.persistent(false);
WiFi.setAutoReconnect(false);
WiFi.mode(WIFI_STA);
WiFi.disconnect(true); // wipe old settings in NVS
WiFi.setHostname(hostname_.c_str()); // updates shared default_hostname buffer
WiFi.enableSTA(true); // creates the STA netif
WiFi.STA.setHostname(hostname_.c_str()); // pushes to esp_netif_set_hostname
WiFi.enableIPv6(true);
if (staticIPConfig_) {
WiFi.config(localIP_, gatewayIP_, subnetMask_, dnsIP1_, dnsIP2_); // configure for static IP
}
// www.esp32.com/viewtopic.php?t=12055
if (bandwidth20_) {
esp_wifi_set_bandwidth(static_cast<wifi_interface_t>(ESP_IF_WIFI_STA), WIFI_BW_HT20);
} else {
esp_wifi_set_bandwidth(static_cast<wifi_interface_t>(ESP_IF_WIFI_STA), WIFI_BW_HT40);
}
if (nosleep_) {
WiFi.setSleep(false); // turn off sleep - WIFI_PS_NONE
}
// set before begin() so the event handlers can race-clear it safely
wifi_connect_pending_ = false;
ethernet_connect_pending_ = false;
// scan settings give connect issues since arduino 2.0.14 and arduino 3.x.x with some wifi systems
// WiFi.setScanMethod(WIFI_ALL_CHANNEL_SCAN); // default is FAST_SCAN
// WiFi.setSortMethod(WIFI_CONNECT_AP_BY_SIGNAL); // is default, no need to set
// avoid duplicate registration, so register the lambdas only once across the lifetime of this Network instance
if (!wifi_events_registered_) {
wifi_events_registered_ = true;
// Defer Tx power setting until STA is actually started
WiFi.onEvent(
[this](WiFiEvent_t /*event*/, WiFiEventInfo_t /*info*/) {
#ifdef BOARD_C3_MINI_V1
// always hardcode Tx power for Wemos C3 Mini v1
// v1 needs this value, see https://github.com/emsesp/EMS-ESP32/pull/620#discussion_r993173979
// https://www.wemos.cc/en/latest/c3/c3_mini_1_0_0.html#about-wifi
WiFi.setTxPower(WIFI_POWER_8_5dBm);
#else
setWiFiPower(tx_power_);
#endif
},
ARDUINO_EVENT_WIFI_STA_START);
// capture the WIFI_REASON_* code on every STA disconnect event so check_connection() can
// log a meaningful reason when its periodic poll notices we're no longer associated.
WiFi.onEvent(
[this](WiFiEvent_t /*event*/, WiFiEventInfo_t info) {
last_disconnect_reason_ = info.wifi_sta_disconnected.reason;
wifi_connect_pending_ = false;
if (wifi_ever_connected_) {
LOG_WARNING("WiFi disconnected (reason: %s)", disconnectReason(last_disconnect_reason_));
} else {
LOG_WARNING("WiFi initial connect attempt failed (reason: %s)", disconnectReason(last_disconnect_reason_));
}
},
ARDUINO_EVENT_WIFI_STA_DISCONNECTED);
// clear the saved reason and the connect-pending guard on a fresh STA association,
// and latch wifi_ever_connected_ so future disconnects log as warnings
WiFi.onEvent(
[this](WiFiEvent_t /*event*/, WiFiEventInfo_t /*info*/) {
last_disconnect_reason_ = 0;
wifi_connect_pending_ = false;
wifi_ever_connected_ = true;
},
ARDUINO_EVENT_WIFI_STA_GOT_IP);
}
#endif
}
// format the BSSID (MAC address) of the network interface
bool Network::formatBSSID(const String & bssid, uint8_t (&mac)[6]) {
#ifndef EMSESP_STANDALONE
uint tmp[6];
if (bssid.isEmpty() || sscanf(bssid.c_str(), "%X:%X:%X:%X:%X:%X", &tmp[0], &tmp[1], &tmp[2], &tmp[3], &tmp[4], &tmp[5]) != 6) {
return false;
}
for (uint8_t i = 0; i < 6; i++) {
mac[i] = static_cast<uint8_t>(tmp[i]);
}
#endif
return true;
}
// get the local IP address of the network interface
std::string Network::getLocalIP() const {
switch (network_iface_) {
#ifndef EMSESP_STANDALONE
case NetIface::AP:
return WiFi.softAPIP().toString().c_str();
case NetIface::WIFI:
return WiFi.localIP().toString().c_str();
case NetIface::ETHERNET:
return ETH.localIP().toString().c_str();
case NetIface::NONE:
#endif
default:
return "";
}
}
// get the MAC address of the network interface
std::string Network::getMacAddress() const {
switch (network_iface_) {
#ifndef EMSESP_STANDALONE
case NetIface::AP:
return WiFi.softAPmacAddress().c_str();
case NetIface::WIFI:
return WiFi.macAddress().c_str();
case NetIface::ETHERNET:
return ETH.macAddress().c_str();
case NetIface::NONE:
#endif
default:
return "";
}
}
// get the number of stations connected to the AP
uint8_t Network::getStationNum() const {
#ifndef EMSESP_STANDALONE
return network_iface_ == NetIface::AP ? WiFi.softAPgetStationNum() : 0;
#else
return 0;
#endif
}
// disconnect all WiFi, Eth and AP
// so we can starts searching again to reconnect
void Network::reconnect() {
LOG_DEBUG("Reconnecting all networks");
#ifndef EMSESP_STANDALONE
// disconnect WiFi
if (wifi_connected()) {
WiFi.disconnect(true, true);
WiFi.mode(WIFI_STA); // reset mode
}
// disconnect AP
if (WiFi.getMode() & WIFI_AP) {
stopAP();
}
#endif
// reset network state
network_ip_ = 0;
network_iface_ = NetIface::NONE;
has_ipv6_ = false;
juststopped_ = false;
wifi_connect_pending_ = false;
ethernet_connect_pending_ = false;
last_disconnect_reason_ = 0;
connect_retry_ = 0;
reconnect_count_ = 0;
phase_ = NetPhase::ETHERNET; // begin() will refine this once settings are reloaded
// reload the network settings and apply them
begin();
}
// pick the first phase that has the hardware/config to even be attempted on this device.
// boards without an Ethernet PHY skip straight to WIFI; without a configured SSID, straight to AP.
NetPhase Network::initialPhase() const {
#ifndef EMSESP_STANDALONE
if (phy_type_ != PHY_type::PHY_TYPE_NONE) {
return NetPhase::ETHERNET;
}
if (!ssid_.isEmpty()) {
return NetPhase::WIFI;
}
#endif
return NetPhase::AP;
}
// network loop, looking for new and disconnecting networks
void Network::loop() {
#ifndef EMSESP_STANDALONE
// if we already have a Wifi or Ethernet connection then re-check every NETWORK_RECONNECTION_DELAY_LONG, otherwise NETWORK_RECONNECTION_DELAY_SHORT
const unsigned long currentMillis = millis();
const uint32_t reconnectDelay =
(network_iface_ == NetIface::WIFI || network_iface_ == NetIface::ETHERNET) ? NETWORK_RECONNECTION_DELAY_LONG : NETWORK_RECONNECTION_DELAY_SHORT;
if (!lastConnectionAttempt_ || static_cast<uint32_t>(currentMillis - lastConnectionAttempt_) >= reconnectDelay) {
lastConnectionAttempt_ = currentMillis;
// manage the network interfaces: Ethernet, WiFi and AP in that order
startEthernet(); // Ethernet
startWIFI(); // WiFi
startAP(); // Captive Portal (AP)
// already have a connection: verify it's still alive
if (network_ip_ != 0 || last_disconnect_reason_ != 0) {
checkConnection();
}
findNetworks(); // detect any new network connections
}
// process DNS requests for the captive portal while the soft-AP is up
if (ap_dnsServer_) {
ap_dnsServer_->processNextRequest();
}
#endif
}
// Re-validate the currently active connection
// if a netif is no longer up or has lost its IP (cable unplugged, AP gone, DHCP lease lost, ...) we drop our state so
// find_networks() can pick up a new one
void Network::checkConnection() {
if (network_iface_ == NetIface::NONE) {
return;
}
#ifndef EMSESP_STANDALONE
bool still_up = false;
for (esp_netif_t * netif = esp_netif_next_unsafe(NULL); netif != NULL; netif = esp_netif_next_unsafe(netif)) {
if (iface_from_desc(esp_netif_get_desc(netif)) != network_iface_) {
continue;
}
esp_netif_ip_info_t ip_info = {};
if (esp_netif_is_netif_up(netif) && esp_netif_get_ip_info(netif, &ip_info) == ESP_OK && ip_info.ip.addr == network_ip_) {
still_up = true;
}
break; // only one active netif per kind in our world (sta / eth / ap)
}
if (!still_up) {
if (network_iface_ == NetIface::WIFI) {
uint8_t reason = last_disconnect_reason_;
if (reason == 0) {
reason = WIFI_REASON_UNSPECIFIED; // event hasn't fired yet (or was cleared); avoid logging "0"
}
LOG_INFO("WiFi connection lost (reason %u: %s)", reason, disconnectReason(reason));
wifi_connect_pending_ = false;
} else if (network_iface_ == NetIface::ETHERNET) {
LOG_INFO("Ethernet connection lost");
ethernet_connect_pending_ = false;
}
juststopped_ = true;
network_iface_ = NetIface::NONE;
network_ip_ = 0;
has_ipv6_ = false;
connect_retry_ = 0;
phase_ = initialPhase();
}
#endif
}
// set the WiFi TxPower based on the RSSI (signal strength), picking the lowest value
// code is based of RSSI (signal strength) and copied from Tasmota's WiFiSetTXpowerBasedOnRssi() which is copied ESPEasy's ESPEasyWifi.SetWiFiTXpower() function
// Range ESP32 : 2dBm - 20dBm
// 802.11b - wifi1
// 802.11a - wifi2
// 802.11g - wifi3
// 802.11n - wifi4
// 802.11ac - wifi5
// 802.11ax - wifi6
// tx_power is the Tx power to set, 0 for auto
void Network::setWiFiPower(uint8_t tx_power) {
#ifndef EMSESP_STANDALONE
if (tx_power != 0) {
if (!WiFi.setTxPower(static_cast<wifi_power_t>(tx_power))) {
emsesp::EMSESP::logger().warning("Failed to set WiFi Tx Power");
}
return;
}
int max_tx_pwr = MAX_TX_PWR_DBM_n; // assume wifi4
int threshold = WIFI_SENSITIVITY_n + 120; // Margin in dBm * 10 on top of threshold
// Assume AP sends with max set by ETSI standard
// 2.4 GHz: 100 mWatt (20 dBm)
// US and some other countries allow 1000 mW (30 dBm)
int rssi = WiFi.RSSI() * 10;
int newrssi = rssi - 200; // We cannot send with over 20 dBm, thus it makes no sense to force higher TX power all the time.
int min_tx_pwr = 0;
if (newrssi < threshold) {
min_tx_pwr = threshold - newrssi;
}
if (min_tx_pwr > max_tx_pwr) {
min_tx_pwr = max_tx_pwr;
}
// from WiFIGeneric.h use:
wifi_power_t p = WIFI_POWER_2dBm;
if (min_tx_pwr > 185)
p = WIFI_POWER_19_5dBm;
else if (min_tx_pwr > 170)
p = WIFI_POWER_18_5dBm;
else if (min_tx_pwr > 150)
p = WIFI_POWER_17dBm;
else if (min_tx_pwr > 130)
p = WIFI_POWER_15dBm;
else if (min_tx_pwr > 110)
p = WIFI_POWER_13dBm;
else if (min_tx_pwr > 85)
p = WIFI_POWER_11dBm;
else if (min_tx_pwr > 70)
p = WIFI_POWER_8_5dBm;
else if (min_tx_pwr > 50)
p = WIFI_POWER_7dBm;
else if (min_tx_pwr > 20)
p = WIFI_POWER_5dBm;
#if defined(EMSESP_DEBUG)
// emsesp::EMSESP::logger().debug("Recommended WiFi Tx Power (set_power %d, new power %d, rssi %d, threshold %d)", min_tx_pwr / 10, p, rssi, threshold);
#endif
if (!WiFi.setTxPower(p)) {
LOG_DEBUG("Failed to set WiFi Tx Power");
}
#endif
}
// start the multicast UDP service so EMS-ESP is discoverable via .local
void Network::startmDNS() const {
#ifndef EMSESP_STANDALONE
MDNS.end();
if (!enableMDNS_) {
return;
}
if (!MDNS.begin(emsesp::EMSESP::system_.hostname().c_str())) {
emsesp::EMSESP::logger().warning("Failed to start mDNS Responder service");
return;
}
std::string address_s = emsesp::EMSESP::system_.hostname() + ".local";
MDNS.addService("http", "tcp", 80); // add our web server and rest API
MDNS.addService("telnet", "tcp", 23); // add our telnet console
MDNS.addServiceTxt("http", "tcp", "address", address_s.c_str());
emsesp::EMSESP::logger().info("Starting mDNS Responder service");
#endif
}
// WiFi disconnect reason code to string
const char * Network::disconnectReason(uint8_t code) {
#ifndef EMSESP_STANDALONE
switch (code) {
case WIFI_REASON_UNSPECIFIED: // = 1,
return "unspecified";
case WIFI_REASON_AUTH_EXPIRE: // = 2,
return "auth expire";
case WIFI_REASON_AUTH_LEAVE: // = 3,
return "auth leave";
case WIFI_REASON_ASSOC_EXPIRE: // = 4,
return "assoc expired";
case WIFI_REASON_ASSOC_TOOMANY: // = 5,
return "assoc too many";
case WIFI_REASON_NOT_AUTHED: // = 6,
return "not authenticated";
case WIFI_REASON_NOT_ASSOCED: // = 7,
return "not assoc";
case WIFI_REASON_ASSOC_LEAVE: // = 8,
return "assoc leave";
case WIFI_REASON_ASSOC_NOT_AUTHED: // = 9,
return "assoc not authed";
case WIFI_REASON_DISASSOC_PWRCAP_BAD: // = 10,
return "disassoc powerCAP bad";
case WIFI_REASON_DISASSOC_SUPCHAN_BAD: // = 11,
return "disassoc supchan bad";
case WIFI_REASON_IE_INVALID: // = 13,
return "IE invalid";
case WIFI_REASON_MIC_FAILURE: // = 14,
return "MIC failure";
case WIFI_REASON_4WAY_HANDSHAKE_TIMEOUT: // = 15,
return "4way handshake timeout";
case WIFI_REASON_GROUP_KEY_UPDATE_TIMEOUT: // = 16,
return "group key-update timeout";
case WIFI_REASON_IE_IN_4WAY_DIFFERS: // = 17,
return "IE in 4way differs";
case WIFI_REASON_GROUP_CIPHER_INVALID: // = 18,
return "group cipher invalid";
case WIFI_REASON_PAIRWISE_CIPHER_INVALID: // = 19,
return "pairwise cipher invalid";
case WIFI_REASON_AKMP_INVALID: // = 20,
return "AKMP invalid";
case WIFI_REASON_UNSUPP_RSN_IE_VERSION: // = 21,
return "unsupported RSN_IE version";
case WIFI_REASON_INVALID_RSN_IE_CAP: // = 22,
return "invalid RSN_IE_CAP";
case WIFI_REASON_802_1X_AUTH_FAILED: // = 23,
return "802 X1 auth failed";
case WIFI_REASON_CIPHER_SUITE_REJECTED: // = 24,
return "cipher suite rejected";
case WIFI_REASON_BEACON_TIMEOUT: // = 200,
return "beacon timeout";
case WIFI_REASON_NO_AP_FOUND: // = 201,
return "no AP found";
case WIFI_REASON_AUTH_FAIL: // = 202,
return "auth fail";
case WIFI_REASON_ASSOC_FAIL: // = 203,
return "assoc fail";
case WIFI_REASON_HANDSHAKE_TIMEOUT: // = 204,
return "handshake timeout";
case WIFI_REASON_CONNECTION_FAIL: // 205,
return "connection fail";
case WIFI_REASON_AP_TSF_RESET: // 206,
return "AP tsf reset";
case WIFI_REASON_ROAMING: // 207,
return "roaming";
case WIFI_REASON_ASSOC_COMEBACK_TIME_TOO_LONG: // 208,
return "assoc comeback time too long";
case WIFI_REASON_SA_QUERY_TIMEOUT: // 209,
return "sa query timeout";
default:
return "unknown";
}
#endif
return "";
}
// WiFi management
void Network::startWIFI() {
#ifndef EMSESP_STANDALONE
// only run during the WIFI phase; ETHERNET phase keeps WiFi quiet, AP phase has its own bring-up
if (phase_ != NetPhase::WIFI) {
return;
}
// exit if WiFi or Ethernet is already connected, or if we have no SSID or another Wifi.begin() is already in progress
if (WiFi.isConnected() || ssid_.isEmpty() || ethernet_connected() || wifi_connect_pending_) {
return;
}
wifi_connect_pending_ = true;
LOG_DEBUG("WiFi connection with %s and %s", ssid_.c_str(), password_.c_str());
// attempt to connect to the wifi network
// the event handlers handle error handling and retries
uint8_t bssid[6];
if (formatBSSID(bssid_, bssid)) {
WiFi.begin(ssid_.c_str(), password_.c_str(), 0, bssid);
} else {
WiFi.begin(ssid_.c_str(), password_.c_str());
}
#endif
}
// Ethernet management
// Brings up the ETH driver / netif exactly once. After ETH.begin() returns true the driver
// continues to run autonomously (link negotiation, DHCP, etc)
void Network::startEthernet() {
#if CONFIG_IDF_TARGET_ESP32
// only run during the ETHERNET phase; once we've given up on Ethernet, the driver is left
// running in case the link comes up later, but we no longer try to (re)start it here
if (phase_ != NetPhase::ETHERNET) {
return;
}
// already up and running, nothing to do
if (ethernet_connect_pending_ || ethernet_connected()) {
return;
}
#ifndef EMSESP_STANDALONE
// no ethernet present
if (phy_type_ == PHY_type::PHY_TYPE_NONE) {
return;
}
// disabled Ethernet for boards with only 4MB flash and no PSRAM
if (ESP.getFlashChipSize() < 4194304 && !ESP.getPsramSize()) { // 4MB
LOG_NOTICE("Ethernet disabled for boards with only 4MB flash");
return;
}
// reset power and add a delay as ETH doesn't not always start up correctly after a warm boot
if (eth_power_ != -1) {
pinMode(eth_power_, OUTPUT);
digitalWrite(eth_power_, LOW);
delay(500);
digitalWrite(eth_power_, HIGH);
}
// mdc = 23 = Pin# of the I²C clock signal for the Ethernet PHY
// mdio = 18 = Pin# of the I²C IO signal for the Ethernet PHY
// phy_addr = I²C-address of Ethernet PHY (0 or 1 for LAN8720, 31 for TLK110)
// power = Pin# of the enable signal for the external crystal oscillator (-1 to disable for internal APLL source)
// type = Type of the Ethernet PHY (LAN8720 or TLK110)
// clock_mode =
// ETH_CLOCK_GPIO0_IN = 0 RMII clock input to GPIO0
// ETH_CLOCK_GPIO0_OUT = 1 RMII clock output from GPIO0
// ETH_CLOCK_GPIO16_OUT = 2 RMII clock output from GPIO16
// ETH_CLOCK_GPIO17_OUT = 3 RMII clock output from GPIO17, for 50hz inverted clock
eth_phy_type_t type = (phy_type_ == PHY_type::PHY_TYPE_LAN8720) ? ETH_PHY_LAN8720
: (phy_type_ == PHY_type::PHY_TYPE_TLK110) ? ETH_PHY_TLK110
: ETH_PHY_RTL8201; // Type of the Ethernet PHY (LAN8720 or TLK110)
if (ETH.begin(type, eth_phy_addr_, 23, 18, eth_power_, (eth_clock_mode_t)eth_clock_mode_)) {
LOG_DEBUG("Ethernet module found - starting");
ethernet_connect_pending_ = true;
ETH.setHostname(hostname_.c_str()); // Push hostname to the ETH netif immediately after it's created
ETH.enableIPv6(true);
if (staticIPConfig_) {
ETH.config(localIP_, gatewayIP_, subnetMask_, dnsIP1_, dnsIP2_);
}
} else {
LOG_ERROR("Failed to start Ethernet module");
}
#endif
#endif
}
// check if the network is connected and set network_ip_ / network_iface_ / has_ipv6_
// Iterates over every esp-netif that exists, prioritizing Ethernet > WiFi > AP
void Network::findNetworks() {
#ifndef EMSESP_STANDALONE
// exit if already have a connection, unless in AP mode
// when in AP mode, it will always try and connect to the WiFi
// TODO what about if Eth drops and then comes back - we want to auto-switch?
// if (network_ip_ != 0 && !(WiFi.getMode() & WIFI_AP)) {
// // for debugging only
// // const esp_ip4_addr_t ip4 = {.addr = network_ip_};
// // LOG_DEBUG("Network already connected via IPv4: " IPSTR, IP2STR(&ip4));
// return;
// }
struct NetInfo {
esp_ip4_addr_t ip;
esp_ip6_addr_t ip6;
char desc[8];
bool has_ipv6;
} info = {};
// Preference order: ETHERNET > WIFI (STA) > AP
auto iface_priority = [](NetIface iface) -> uint8_t {
switch (iface) {
case NetIface::ETHERNET:
return 3;
case NetIface::WIFI:
return 2;
case NetIface::AP:
return 1;
case NetIface::NONE:
default:
return 0;
}
};
NetIface best_iface = NetIface::NONE;
for (esp_netif_t * netif = esp_netif_next_unsafe(NULL); netif != NULL; netif = esp_netif_next_unsafe(netif)) {
const char * desc = esp_netif_get_desc(netif);
bool is_up = esp_netif_is_netif_up(netif);
esp_netif_ip_info_t ip_info = {};
esp_err_t err = esp_netif_get_ip_info(netif, &ip_info);
if (!is_up || err != ESP_OK || ip_info.ip.addr == 0) {
continue;
}
const NetIface candidate = iface_from_desc(desc);
if (iface_priority(candidate) <= iface_priority(best_iface)) {
continue; // already have something at least as good
}
info.ip = ip_info.ip;
if (desc) {
strlcpy(info.desc, desc, sizeof(info.desc));
}
info.has_ipv6 = (esp_netif_get_ip6_linklocal(netif, &info.ip6) == ESP_OK);
best_iface = candidate;
if (best_iface == NetIface::ETHERNET) {
break; // top priority, can't be beaten by anything later in the list
}
}
// if we have a connection and it's a new one, set it up
if (best_iface != NetIface::NONE && best_iface != network_iface_) {
network_ip_ = info.ip.addr;
network_iface_ = iface_from_desc(info.desc); // "sta"/"ap"/"eth*"
has_ipv6_ = info.has_ipv6;
connect_retry_ = 0;
// sync the phase to the interface that actually came up. ETH can come up late
// (e.g. cable plugged in after we'd already moved on to WiFi/AP) and we want the
// next disconnect-driven retry cycle to start from the right place.
if (network_iface_ == NetIface::ETHERNET) {
phase_ = NetPhase::ETHERNET;
} else if (network_iface_ == NetIface::WIFI) {
phase_ = NetPhase::WIFI;
} else if (network_iface_ == NetIface::AP) {
phase_ = NetPhase::AP;
}
LOG_INFO("Network connected via %s (IP: " IPSTR ")",
network_iface_ == NetIface::ETHERNET ? "Ethernet"
: network_iface_ == NetIface::WIFI ? "WiFi"
: network_iface_ == NetIface::AP ? "AP"
: "unknown",
IP2STR(&info.ip));
// if we have a Eth or Wifi connection and the AP is running, stop it
if (network_iface_ != NetIface::AP && WiFi.getMode() & WIFI_AP) {
stopAP();
}
// count the number of restarts (for Wifi and Eth)
if (juststopped_) {
juststopped_ = false;
reconnect_count_++;
}
// start mDNS for any real network interface (skip the SoftAP since the captive portal handles its own DNS)
if (enableMDNS_ && network_iface_ != NetIface::AP && network_iface_ != NetIface::NONE) {
startmDNS();
}
// fetch the versions.json file from emsesp.org
EMSESP::webStatusService.schedule_versions_refresh();
return;
}
// fallback, reset network state if nothing found
if (best_iface == NetIface::NONE) {
network_ip_ = 0;
network_iface_ = NetIface::NONE;
has_ipv6_ = false;
connect_retry_++;
LOG_DEBUG("Looking for network interfaces (retry #%d, phase=%s)",
connect_retry_,
phase_ == NetPhase::ETHERNET ? "Ethernet"
: phase_ == NetPhase::WIFI ? "WiFi"
: "AP");
// give up on this interface and try the next one. ETHERNET -> WIFI (or straight to AP if no SSID configured); WIFI -> AP.
if (connect_retry_ >= MAX_NETWORK_RECONNECTION_ATTEMPTS && phase_ != NetPhase::AP) {
if (phase_ == NetPhase::ETHERNET) {
if (ssid_.isEmpty()) {
LOG_WARNING("Ethernet failed to connect after %u attempts, falling back to AP", connect_retry_);
phase_ = NetPhase::AP;
} else {
LOG_WARNING("Ethernet failed to connect after %u attempts, switching to WiFi", connect_retry_);
phase_ = NetPhase::WIFI;
}
ethernet_connect_pending_ = false;
} else if (phase_ == NetPhase::WIFI) {
LOG_WARNING("WiFi failed to connect after %u attempts, falling back to AP", connect_retry_);
phase_ = NetPhase::AP;
wifi_connect_pending_ = false;
WiFi.disconnect(true);
}
connect_retry_ = 0;
}
}
#endif
return;
}
// access point (soft-AP) and the captive portal
void Network::startAP() {
#ifndef EMSESP_STANDALONE
// only start AP as a fallback once both the Ethernet and WiFi phases have given up
if (phase_ != NetPhase::AP) {
return;
}
// don't start the soft-AP if it is disabled, or Ethernet has taken over or we have a real WiFi connection or it's already running
if (ap_provisionMode_ == AP_MODE_NEVER || network_connected() || WiFi.getMode() & WIFI_AP) {
return;
}
WiFi.softAPenableIPv6(); // force IPv6, same as for STA - fixes https://github.com/emsesp/EMS-ESP32/issues/1922
WiFi.softAPConfig(ap_localIP_, ap_gatewayIP_, ap_subnetMask_);
esp_wifi_set_bandwidth(static_cast<wifi_interface_t>(ESP_IF_WIFI_AP), WIFI_BW_HT20);
WiFi.softAP(ap_ssid_.c_str(), ap_password_.c_str(), ap_channel_, ap_ssid_hidden_, ap_max_clients_);
#if CONFIG_IDF_TARGET_ESP32C3
WiFi.setTxPower(WIFI_POWER_8_5dBm); // https://www.wemos.cc/en/latest/c3/c3_mini_1_0_0.html#about-wifi
#endif
const IPAddress apIp = WiFi.softAPIP();
LOG_INFO("Starting Access Point with captive portal on %u.%u.%u.%u", apIp[0], apIp[1], apIp[2], apIp[3]);
// start DNS server for Captive Portal
ap_dnsServer_ = new DNSServer;
ap_dnsServer_->start(DNS_PORT, "*", apIp);
#endif
}
// stop AP
void Network::stopAP() {
LOG_INFO("Stopping Access Point");
#ifndef EMSESP_STANDALONE
WiFi.softAPdisconnect(true);
if (ap_dnsServer_) {
ap_dnsServer_->stop();
delete ap_dnsServer_;
ap_dnsServer_ = nullptr;
}
#endif
}
} // namespace emsesp
Reference in New Issue View Git Blame Copy Permalink