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Networking.ino
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#include "src/Globals/Nodes.h"
#include "src/Globals/ESPEasyWiFiEvent.h"
// Generic Networking routines
// Syslog
// UDP system messaging
// SSDP
// #if LWIP_VERSION_MAJOR == 2
#define IPADDR2STR(addr) (uint8_t)((uint32_t)addr & 0xFF), (uint8_t)(((uint32_t)addr >> 8) & 0xFF), \
(uint8_t)(((uint32_t)addr >> 16) & 0xFF), (uint8_t)(((uint32_t)addr >> 24) & 0xFF)
// #endif
#include <lwip/netif.h>
#ifdef ESP8266
# if !defined(ARDUINO_ESP8266_RELEASE_2_4_0) && !defined(ARDUINO_ESP8266_RELEASE_2_3_0)
# define SUPPORT_ARP
# endif // if !defined(ARDUINO_ESP8266_RELEASE_2_4_0) && !defined(ARDUINO_ESP8266_RELEASE_2_3_0)
#endif // ifdef ESP8266
#ifdef ESP32
# define SUPPORT_ARP
#endif // ifdef ESP32
#ifdef SUPPORT_ARP
# include <lwip/etharp.h>
# ifdef ESP32
# include <lwip/etharp.h>
# include <lwip/tcpip.h>
void _etharp_gratuitous_func(struct netif *netif) {
etharp_gratuitous(netif);
}
void etharp_gratuitous_r(struct netif *netif) {
tcpip_callback_with_block((tcpip_callback_fn)_etharp_gratuitous_func, netif, 0);
}
# endif // ifdef ESP32
#endif // ifdef SUPPORT_ARP
#ifdef USE_SETTINGS_ARCHIVE
# ifdef ESP8266
# include <ESP8266HTTPClient.h>
# endif // ifdef ESP8266
# ifdef ESP32
# include "HTTPClient.h"
# endif // ifdef ESP32
#endif // USE_SETTINGS_ARCHIVE
#include "src/DataStructs/EventValueSource.h"
/*********************************************************************************************\
Syslog client
\*********************************************************************************************/
void syslog(byte logLevel, const char *message)
{
if ((Settings.Syslog_IP[0] != 0) && WiFiConnected())
{
IPAddress broadcastIP(Settings.Syslog_IP[0], Settings.Syslog_IP[1], Settings.Syslog_IP[2], Settings.Syslog_IP[3]);
portUDP.beginPacket(broadcastIP, 514);
char str[256];
str[0] = 0;
byte prio = Settings.SyslogFacility * 8;
if (logLevel == LOG_LEVEL_ERROR) {
prio += 3; // syslog error
}
else if (logLevel == LOG_LEVEL_INFO) {
prio += 5; // syslog notice
}
else {
prio += 7;
}
// An RFC3164 compliant message must be formated like : "<PRIO>[TimeStamp ]Hostname TaskName: Message"
// Using Settings.Name as the Hostname (Hostname must NOT content space)
snprintf_P(str, sizeof(str), PSTR("<%u>%s EspEasy: %s"), prio, Settings.Name, message);
// Using Setting.Unit to build a Hostname
// snprintf_P(str, sizeof(str), PSTR("<7>EspEasy_%u ESP: %s"), Settings.Unit, message);
#if defined(ESP8266)
portUDP.write(str);
#endif // if defined(ESP8266)
#if defined(ESP32)
portUDP.write((uint8_t *)str, strlen(str));
#endif // if defined(ESP32)
portUDP.endPacket();
}
}
/*********************************************************************************************\
Check UDP messages (ESPEasy propiertary protocol)
\*********************************************************************************************/
boolean runningUPDCheck = false;
void checkUDP()
{
if (Settings.UDPPort == 0) {
return;
}
if (runningUPDCheck) {
return;
}
runningUPDCheck = true;
// UDP events
int packetSize = portUDP.parsePacket();
if (packetSize > 0 /*&& portUDP.remotePort() == Settings.UDPPort*/)
{
statusLED(true);
IPAddress remoteIP = portUDP.remoteIP();
if (portUDP.remotePort() == 123)
{
// unexpected NTP reply, drop for now...
runningUPDCheck = false;
return;
}
if ((packetSize >= 2) && (packetSize < UDP_PACKETSIZE_MAX)) {
// Allocate buffer to process packet.
std::vector<char> packetBuffer;
packetBuffer.resize(packetSize + 1);
memset(&packetBuffer[0], 0, packetSize + 1);
int len = portUDP.read(&packetBuffer[0], packetSize);
if (len >= 2) {
if (packetBuffer[0] != 255)
{
packetBuffer[len] = 0;
addLog(LOG_LEVEL_DEBUG, &packetBuffer[0]);
ExecuteCommand_all(VALUE_SOURCE_SYSTEM, &packetBuffer[0]);
}
else
{
// binary data!
switch (packetBuffer[1])
{
case 1: // sysinfo message
{
if (len < 13) {
break;
}
byte unit = packetBuffer[12];
#ifndef BUILD_NO_DEBUG
byte mac[6];
byte ip[4];
for (byte x = 0; x < 6; x++) {
mac[x] = packetBuffer[x + 2];
}
for (byte x = 0; x < 4; x++) {
ip[x] = packetBuffer[x + 8];
}
#endif // ifndef BUILD_NO_DEBUG
Nodes[unit].age = 0; // Create a new element when not present
NodesMap::iterator it = Nodes.find(unit);
if (it != Nodes.end()) {
for (byte x = 0; x < 4; x++) {
it->second.ip[x] = packetBuffer[x + 8];
}
it->second.age = 0; // reset 'age counter'
if (len >= 41) // extended packet size
{
it->second.build = packetBuffer[13] + 256 * packetBuffer[14];
char tmpNodeName[26] = { 0 };
memcpy(&tmpNodeName[0], reinterpret_cast<byte *>(&packetBuffer[15]), 25);
tmpNodeName[25] = 0;
it->second.nodeName = tmpNodeName;
it->second.nodeName.trim();
it->second.nodeType = packetBuffer[40];
}
}
#ifndef BUILD_NO_DEBUG
if (loglevelActiveFor(LOG_LEVEL_DEBUG_MORE)) {
char macaddress[20];
formatMAC(mac, macaddress);
char log[80] = { 0 };
sprintf_P(log, PSTR("UDP : %s,%s,%u"), macaddress, formatIP(ip).c_str(), unit);
addLog(LOG_LEVEL_DEBUG_MORE, log);
}
#endif // ifndef BUILD_NO_DEBUG
break;
}
default:
{
struct EventStruct TempEvent;
TempEvent.Data = reinterpret_cast<byte *>(&packetBuffer[0]);
TempEvent.Par1 = remoteIP[3];
TempEvent.Par2 = len;
String dummy;
PluginCall(PLUGIN_UDP_IN, &TempEvent, dummy);
CPluginCall(CPLUGIN_UDP_IN, &TempEvent);
break;
}
}
}
}
}
}
#if defined(ESP32) // testing
portUDP.flush();
#endif // if defined(ESP32)
runningUPDCheck = false;
}
/*********************************************************************************************\
Send event using UDP message
\*********************************************************************************************/
void SendUDPCommand(byte destUnit, const char *data, byte dataLength)
{
if (!WiFiConnected(10)) {
return;
}
if (destUnit != 0)
{
sendUDP(destUnit, (const byte *)data, dataLength);
delay(10);
} else {
for (NodesMap::iterator it = Nodes.begin(); it != Nodes.end(); ++it) {
if (it->first != Settings.Unit) {
sendUDP(it->first, (const byte *)data, dataLength);
delay(10);
}
}
}
delay(50);
}
/*********************************************************************************************\
Send UDP message (unit 255=broadcast)
\*********************************************************************************************/
void sendUDP(byte unit, const byte *data, byte size)
{
if (!WiFiConnected(10)) {
return;
}
IPAddress remoteNodeIP;
if (unit == 255) {
remoteNodeIP = { 255, 255, 255, 255 };
}
else {
NodesMap::iterator it = Nodes.find(unit);
if (it == Nodes.end()) {
return;
}
if (it->second.ip[0] == 0) {
return;
}
remoteNodeIP = it->second.ip;
}
#ifndef BUILD_NO_DEBUG
if (loglevelActiveFor(LOG_LEVEL_DEBUG_MORE)) {
String log = F("UDP : Send UDP message to ");
log += unit;
addLog(LOG_LEVEL_DEBUG_MORE, log);
}
#endif // ifndef BUILD_NO_DEBUG
statusLED(true);
portUDP.beginPacket(remoteNodeIP, Settings.UDPPort);
portUDP.write(data, size);
portUDP.endPacket();
}
/*********************************************************************************************\
Refresh aging for remote units, drop if too old...
\*********************************************************************************************/
void refreshNodeList()
{
bool mustSendGratuitousARP = false;
for (NodesMap::iterator it = Nodes.begin(); it != Nodes.end();) {
bool mustRemove = true;
if (it->second.ip[0] != 0) {
if (it->second.age > 8) {
// Increase frequency sending ARP requests for 2 minutes
mustSendGratuitousARP = true;
}
if (it->second.age < 10) {
it->second.age++;
mustRemove = false;
++it;
}
}
if (mustRemove) {
it = Nodes.erase(it);
}
}
if (mustSendGratuitousARP) {
sendGratuitousARP_now();
}
}
/*********************************************************************************************\
Broadcast system info to other nodes. (to update node lists)
\*********************************************************************************************/
void sendSysInfoUDP(byte repeats)
{
if ((Settings.UDPPort == 0) || !WiFiConnected(10)) {
return;
}
// TODO: make a nice struct of it and clean up
// 1 byte 'binary token 255'
// 1 byte id '1'
// 6 byte mac
// 4 byte ip
// 1 byte unit
// 2 byte build
// 25 char name
// 1 byte node type id
// send my info to the world...
#ifndef BUILD_NO_DEBUG
addLog(LOG_LEVEL_DEBUG_MORE, F("UDP : Send Sysinfo message"));
#endif // ifndef BUILD_NO_DEBUG
for (byte counter = 0; counter < repeats; counter++)
{
uint8_t mac[] = { 0, 0, 0, 0, 0, 0 };
uint8_t *macread = WiFi.macAddress(mac);
byte data[80];
data[0] = 255;
data[1] = 1;
for (byte x = 0; x < 6; x++) {
data[x + 2] = macread[x];
}
IPAddress ip = WiFi.localIP();
for (byte x = 0; x < 4; x++) {
data[x + 8] = ip[x];
}
data[12] = Settings.Unit;
data[13] = Settings.Build & 0xff;
data[14] = Settings.Build >> 8;
memcpy((byte *)data + 15, Settings.Name, 25);
data[40] = NODE_TYPE_ID;
statusLED(true);
IPAddress broadcastIP(255, 255, 255, 255);
portUDP.beginPacket(broadcastIP, Settings.UDPPort);
portUDP.write(data, 80);
portUDP.endPacket();
if (counter < (repeats - 1)) {
delay(500);
}
}
Nodes[Settings.Unit].age = 0; // Create new node when not already present.
// store my own info also in the list
NodesMap::iterator it = Nodes.find(Settings.Unit);
if (it != Nodes.end())
{
IPAddress ip = WiFi.localIP();
for (byte x = 0; x < 4; x++) {
it->second.ip[x] = ip[x];
}
it->second.age = 0;
it->second.build = Settings.Build;
it->second.nodeType = NODE_TYPE_ID;
}
}
#if defined(ESP8266)
# ifdef USES_SSDP
/********************************************************************************************\
Respond to HTTP XML requests for SSDP information
\*********************************************************************************************/
void SSDP_schema(WiFiClient& client) {
if (!WiFiConnected(10)) {
return;
}
const IPAddress ip = WiFi.localIP();
const uint32_t chipId = ESP.getChipId();
char uuid[64];
sprintf_P(uuid, PSTR("38323636-4558-4dda-9188-cda0e6%02x%02x%02x"),
(uint16_t)((chipId >> 16) & 0xff),
(uint16_t)((chipId >> 8) & 0xff),
(uint16_t)chipId & 0xff);
String ssdp_schema = F(
"HTTP/1.1 200 OK\r\n"
"Content-Type: text/xml\r\n"
"Connection: close\r\n"
"Access-Control-Allow-Origin: *\r\n"
"\r\n"
"<?xml version=\"1.0\"?>"
"<root xmlns=\"urn:schemas-upnp-org:device-1-0\">"
"<specVersion>"
"<major>1</major>"
"<minor>0</minor>"
"</specVersion>"
"<URLBase>http://");
ssdp_schema += formatIP(ip);
ssdp_schema += F(":80/</URLBase>"
"<device>"
"<deviceType>urn:schemas-upnp-org:device:BinaryLight:1</deviceType>"
"<friendlyName>");
ssdp_schema += Settings.Name;
ssdp_schema += F("</friendlyName>"
"<presentationURL>/</presentationURL>"
"<serialNumber>");
ssdp_schema += ESP.getChipId();
ssdp_schema += F("</serialNumber>"
"<modelName>ESP Easy</modelName>"
"<modelNumber>");
ssdp_schema += F(BUILD_GIT);
ssdp_schema += F("</modelNumber>"
"<modelURL>http://www.letscontrolit.com</modelURL>"
"<manufacturer>http://www.letscontrolit.com</manufacturer>"
"<manufacturerURL>http://www.letscontrolit.com</manufacturerURL>"
"<UDN>uuid:");
ssdp_schema += uuid;
ssdp_schema += F("</UDN></device>"
"</root>\r\n"
"\r\n");
client.printf(ssdp_schema.c_str());
}
/********************************************************************************************\
Global SSDP stuff
\*********************************************************************************************/
typedef enum {
NONE,
SEARCH,
NOTIFY
} ssdp_method_t;
UdpContext *_server;
IPAddress _respondToAddr;
uint16_t _respondToPort;
bool _pending;
unsigned short _delay;
unsigned long _process_time;
unsigned long _notify_time;
# define SSDP_INTERVAL 1200
# define SSDP_PORT 1900
# define SSDP_METHOD_SIZE 10
# define SSDP_URI_SIZE 2
# define SSDP_BUFFER_SIZE 64
# define SSDP_MULTICAST_TTL 2
static const IPAddress SSDP_MULTICAST_ADDR(239, 255, 255, 250);
/********************************************************************************************\
Launch SSDP listener and send initial notify
\*********************************************************************************************/
bool SSDP_begin() {
_pending = false;
if (_server) {
_server->unref();
_server = 0;
}
_server = new UdpContext;
_server->ref();
ip_addr_t ifaddr;
ifaddr.addr = WiFi.localIP();
ip_addr_t multicast_addr;
multicast_addr.addr = (uint32_t)SSDP_MULTICAST_ADDR;
if (igmp_joingroup(&ifaddr, &multicast_addr) != ERR_OK) {
return false;
}
# ifdef CORE_POST_2_5_0
// Core 2.5.0 changed the signature of some UdpContext function.
if (!_server->listen(IP_ADDR_ANY, SSDP_PORT)) {
return false;
}
_server->setMulticastInterface(&ifaddr);
_server->setMulticastTTL(SSDP_MULTICAST_TTL);
_server->onRx(&SSDP_update);
if (!_server->connect(&multicast_addr, SSDP_PORT)) {
return false;
}
# else // ifdef CORE_POST_2_5_0
if (!_server->listen(*IP_ADDR_ANY, SSDP_PORT)) {
return false;
}
_server->setMulticastInterface(ifaddr);
_server->setMulticastTTL(SSDP_MULTICAST_TTL);
_server->onRx(&SSDP_update);
if (!_server->connect(multicast_addr, SSDP_PORT)) {
return false;
}
# endif // ifdef CORE_POST_2_5_0
SSDP_update();
return true;
}
/********************************************************************************************\
Send SSDP messages (notify & responses)
\*********************************************************************************************/
void SSDP_send(byte method) {
uint32_t ip = WiFi.localIP();
// FIXME TD-er: Why create String objects of these flashstrings?
String _ssdp_response_template = F(
"HTTP/1.1 200 OK\r\n"
"EXT:\r\n"
"ST: upnp:rootdevice\r\n");
String _ssdp_notify_template = F(
"NOTIFY * HTTP/1.1\r\n"
"HOST: 239.255.255.250:1900\r\n"
"NT: upnp:rootdevice\r\n"
"NTS: ssdp:alive\r\n");
String _ssdp_packet_template = F(
"%s" // _ssdp_response_template / _ssdp_notify_template
"CACHE-CONTROL: max-age=%u\r\n" // SSDP_INTERVAL
"SERVER: Arduino/1.0 UPNP/1.1 ESPEasy/%u\r\n" // _modelNumber
"USN: uuid:%s\r\n" // _uuid
"LOCATION: http://%u.%u.%u.%u:80/ssdp.xml\r\n" // WiFi.localIP(),
"\r\n");
{
char uuid[64] = { 0 };
uint32_t chipId = ESP.getChipId();
sprintf_P(uuid, PSTR("38323636-4558-4dda-9188-cda0e6%02x%02x%02x"),
(uint16_t)((chipId >> 16) & 0xff),
(uint16_t)((chipId >> 8) & 0xff),
(uint16_t)chipId & 0xff);
char *buffer = new char[1460]();
int len = snprintf(buffer, 1460,
_ssdp_packet_template.c_str(),
(method == 0) ? _ssdp_response_template.c_str() : _ssdp_notify_template.c_str(),
SSDP_INTERVAL,
Settings.Build,
uuid,
IPADDR2STR(&ip)
);
_server->append(buffer, len);
delete[] buffer;
}
ip_addr_t remoteAddr;
uint16_t remotePort;
if (method == 0) {
remoteAddr.addr = _respondToAddr;
remotePort = _respondToPort;
} else {
remoteAddr.addr = SSDP_MULTICAST_ADDR;
remotePort = SSDP_PORT;
}
_server->send(&remoteAddr, remotePort);
statusLED(true);
}
/********************************************************************************************\
SSDP message processing
\*********************************************************************************************/
void SSDP_update() {
if (!_pending && _server->next()) {
ssdp_method_t method = NONE;
_respondToAddr = _server->getRemoteAddress();
_respondToPort = _server->getRemotePort();
typedef enum { METHOD, URI, PROTO, KEY, VALUE, ABORT } states;
states state = METHOD;
typedef enum { START, MAN, ST, MX } headers;
headers header = START;
uint8_t cursor = 0;
uint8_t cr = 0;
char buffer[SSDP_BUFFER_SIZE] = { 0 };
while (_server->getSize() > 0) {
char c = _server->read();
(c == '\r' || c == '\n') ? cr++ : cr = 0;
switch (state) {
case METHOD:
if (c == ' ') {
if (strcmp_P(buffer, PSTR("M-SEARCH")) == 0) { method = SEARCH; }
else if (strcmp_P(buffer, PSTR("NOTIFY")) == 0) { method = NOTIFY; }
if (method == NONE) { state = ABORT; }
else { state = URI; }
cursor = 0;
} else if (cursor < SSDP_METHOD_SIZE - 1) {
buffer[cursor++] = c;
buffer[cursor] = '\0';
}
break;
case URI:
if (c == ' ') {
if (strcmp(buffer, "*")) { state = ABORT; }
else { state = PROTO; }
cursor = 0;
} else if (cursor < SSDP_URI_SIZE - 1) {
buffer[cursor++] = c;
buffer[cursor] = '\0';
}
break;
case PROTO:
if (cr == 2) {
state = KEY;
cursor = 0;
}
break;
case KEY:
if (cr == 4) {
_pending = true;
_process_time = millis();
}
else if (c == ' ') {
cursor = 0;
state = VALUE;
}
else if ((c != '\r') && (c != '\n') && (c != ':') && (cursor < SSDP_BUFFER_SIZE - 1)) {
buffer[cursor++] = c;
buffer[cursor] = '\0';
}
break;
case VALUE:
if (cr == 2) {
switch (header) {
case START:
break;
case MAN:
break;
case ST:
if (strcmp_P(buffer, PSTR("ssdp:all"))) {
state = ABORT;
}
// if the search type matches our type, we should respond instead of ABORT
if (strcmp_P(buffer, PSTR("urn:schemas-upnp-org:device:BinaryLight:1")) == 0) {
_pending = true;
_process_time = millis();
state = KEY;
}
break;
case MX:
_delay = random(0, atoi(buffer)) * 1000L;
break;
}
if (state != ABORT) {
state = KEY;
header = START;
cursor = 0;
}
} else if ((c != '\r') && (c != '\n')) {
if (header == START) {
if (strncmp(buffer, "MA", 2) == 0) { header = MAN; }
else if (strcmp(buffer, "ST") == 0) { header = ST; }
else if (strcmp(buffer, "MX") == 0) { header = MX; }
}
if (cursor < SSDP_BUFFER_SIZE - 1) {
buffer[cursor++] = c;
buffer[cursor] = '\0';
}
}
break;
case ABORT:
_pending = false; _delay = 0;
break;
}
}
}
if (_pending && timeOutReached(_process_time + _delay)) {
_pending = false; _delay = 0;
SSDP_send(NONE);
} else if ((_notify_time == 0) || timeOutReached(_notify_time + (SSDP_INTERVAL * 1000L))) {
_notify_time = millis();
SSDP_send(NOTIFY);
}
if (_pending) {
while (_server->next()) {
_server->flush();
}
}
}
# endif // ifdef USES_SSDP
#endif // if defined(ESP8266)
// ********************************************************************************
// Return subnet range of WiFi.
// ********************************************************************************
bool getSubnetRange(IPAddress& low, IPAddress& high)
{
if (wifiStatus < ESPEASY_WIFI_GOT_IP) {
return false;
}
const IPAddress ip = WiFi.localIP();
const IPAddress subnet = WiFi.subnetMask();
low = ip;
high = ip;
// Compute subnet range.
for (byte i = 0; i < 4; ++i) {
if (subnet[i] != 255) {
low[i] = low[i] & subnet[i];
high[i] = high[i] | ~subnet[i];
}
}
return true;
}
// ********************************************************************************
// Functions to test and handle network/client connectivity.
// ********************************************************************************
#ifdef CORE_POST_2_5_0
# include <AddrList.h>
#endif // ifdef CORE_POST_2_5_0
bool hasIPaddr() {
#ifdef CORE_POST_2_5_0
bool configured = false;
for (auto addr : addrList) {
if ((configured = (!addr.isLocal() && (addr.ifnumber() == STATION_IF)))) {
/*
Serial.printf("STA: IF='%s' hostname='%s' addr= %s\n",
addr.ifname().c_str(),
addr.ifhostname(),
addr.toString().c_str());
*/
break;
}
}
return configured;
#else // ifdef CORE_POST_2_5_0
return WiFi.isConnected();
#endif // ifdef CORE_POST_2_5_0
}
// Check WiFi connection. Maximum timeout 500 msec.
bool WiFiConnected(uint32_t timeout_ms) {
uint32_t timer = millis() + (timeout_ms > 500 ? 500 : timeout_ms);
uint32_t min_delay = timeout_ms / 20;
if (min_delay < 10) {
delay(0); // Allow at least once time for backgroundtasks
min_delay = 10;
}
// Apparently something needs network, perform check to see if it is ready now.
while (!WiFiConnected()) {
if (timeOutReached(timer)) {
return false;
}
delay(min_delay); // Allow the backgroundtasks to continue procesing.
}
return true;
}
bool hostReachable(const IPAddress& ip) {
if (!WiFiConnected()) { return false; }
return true; // Disabled ping as requested here:
// https://github.com/letscontrolit/ESPEasy/issues/1494#issuecomment-397872538
/*
// Only do 1 ping at a time to return early
byte retry = 3;
while (retry > 0) {
#if defined(ESP8266)
if (Ping.ping(ip, 1)) return true;
#endif
#if defined(ESP32)
if (ping_start(ip, 4, 0, 0, 5)) return true;
#endif
delay(50);
--retry;
}
if (loglevelActiveFor(LOG_LEVEL_ERROR)) {
String log = F("Host unreachable: ");
log += formatIP(ip);
addLog(LOG_LEVEL_ERROR, log);
}
if (ip[1] == 0 && ip[2] == 0 && ip[3] == 0) {
// Work-around to fix connected but not able to communicate.
addLog(LOG_LEVEL_ERROR, F("Wifi : Detected strange behavior, reconnect wifi."));
WifiDisconnect();
}
logConnectionStatus();
return false;
*/
}
bool connectClient(WiFiClient& client, const char *hostname, uint16_t port) {
IPAddress ip;
if (resolveHostByName(hostname, ip)) {
return connectClient(client, ip, port);
}
return false;
}
bool connectClient(WiFiClient& client, IPAddress ip, uint16_t port)
{
START_TIMER;
if (!WiFiConnected()) {
return false;
}
bool connected = (client.connect(ip, port) == 1);
yield();
if (!connected) {
sendGratuitousARP_now();
}
STOP_TIMER(CONNECT_CLIENT_STATS);
#if defined(ESP32) || defined(ARDUINO_ESP8266_RELEASE_2_3_0) || defined(ARDUINO_ESP8266_RELEASE_2_4_0)
#else
if (connected) {
client.keepAlive(); // Use default keep alive values
}
#endif // if defined(ESP32) || defined(ARDUINO_ESP8266_RELEASE_2_3_0) || defined(ARDUINO_ESP8266_RELEASE_2_4_0)
return connected;
}
bool resolveHostByName(const char *aHostname, IPAddress& aResult) {
START_TIMER;
if (!WiFiConnected()) {
return false;
}
#if defined(ARDUINO_ESP8266_RELEASE_2_3_0) || defined(ESP32)
bool resolvedIP = WiFi.hostByName(aHostname, aResult) == 1;
#else // if defined(ARDUINO_ESP8266_RELEASE_2_3_0) || defined(ESP32)
bool resolvedIP = WiFi.hostByName(aHostname, aResult, CONTROLLER_CLIENTTIMEOUT_DFLT) == 1;
#endif // if defined(ARDUINO_ESP8266_RELEASE_2_3_0) || defined(ESP32)
yield();
if (!resolvedIP) {
sendGratuitousARP_now();
}
STOP_TIMER(HOST_BY_NAME_STATS);
return resolvedIP;
}
bool hostReachable(const String& hostname) {
IPAddress remote_addr;
if (resolveHostByName(hostname.c_str(), remote_addr)) {
return hostReachable(remote_addr);
}
String log = F("Hostname cannot be resolved: ");
log += hostname;
addLog(LOG_LEVEL_ERROR, log);
return false;
}
// Create a random port for the UDP connection.
// Return true when successful.
bool beginWiFiUDP_randomPort(WiFiUDP& udp) {
if (!WiFiConnected()) {
return false;
}
unsigned int attempts = 3;
while (attempts > 0) {
--attempts;
long port = random(1025, 65535);
if (udp.begin(port) != 0) {
return true;
}
}
return false;
}
void sendGratuitousARP() {
if (!WiFiConnected()) {
return;
}
#ifdef SUPPORT_ARP
// See https://github.com/letscontrolit/ESPEasy/issues/2374
START_TIMER;
netif *n = netif_list;
while (n) {
if ((n->hwaddr_len == ETH_HWADDR_LEN) &&
(n->flags & NETIF_FLAG_ETHARP) &&
((n->flags & NETIF_FLAG_LINK_UP) && (n->flags & NETIF_FLAG_UP))) {
# ifdef ESP32
etharp_gratuitous_r(n);
# else // ifdef ESP32
etharp_gratuitous(n);
# endif // ifdef ESP32
}
n = n->next;
}
STOP_TIMER(GRAT_ARP_STATS);
#endif // ifdef SUPPORT_ARP
}
bool splitHostPortString(const String& hostPortString, String& host, uint16_t& port) {
port = 80; // Some default
int index_colon = hostPortString.indexOf(':');
if (index_colon >= 0) {
int port_tmp;
if (!validIntFromString(hostPortString.substring(index_colon + 1), port_tmp)) {
return false;
}
if ((port_tmp < 0) || (port_tmp > 65535)) { return false; }
port = port_tmp;
host = hostPortString.substring(0, index_colon);
} else {
// No port nr defined.
host = hostPortString;
}
return true;
}
// Split a full URL like "http://hostname:port/path/file.htm"
// Return value is everything after the hostname:port section (including /)
String splitURL(const String& fullURL, String& host, uint16_t& port, String& file) {
int starthost = fullURL.indexOf(F("//"));
if (starthost == -1) {
starthost = 0;
} else {
starthost += 2;
}
int endhost = fullURL.indexOf('/', starthost);
splitHostPortString(fullURL.substring(starthost, endhost), host, port);
int startfile = fullURL.lastIndexOf('/');
if (startfile >= 0) {
file = fullURL.substring(startfile);