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RemoteDebug.cpp
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/*
* Libraries Arduino
* *****************
* Library : Remote debug - debug over telnet - for Esp8266 (NodeMCU) or ESP32
* Author : Joao Lopes
* Comments: Based on example of TelnetServer code in http: *www.rudiswiki.de/wiki9/WiFiTelnetServer
* License : See RemoteDebug.h
*
* Versions:
* - 0.9.0 Beta 1 - August 2016
* - 0.9.1 Beta 2 - Octuber 2016
* - 1.0.0 RC - January 2017
* - 1.0.1 New connection logic - August 2017
* - New level -> profiler and auto-profiler
* New commands for CPU frequencies
* - 1.1.0 Support to ESP32 - August 2017
* - 1.1.1 Added support for the pass through of commands, and default debug levels - 11/24/2017 - B. Harville
* - 1.2.0 Added shortcuts and buffering to avoid delays
* - 1.2.1 Adjusts to not cause error in Arduino
* - 1.3.0 Bug in write with latest ESP8266 SDK - August 2018
* Port number can be modified in project Arduino (.ino file)
* Few adjustments as ESP32 includes
* - 1.3.1 Retired # from VARGS precompiler macros
* - 1.4.0 A simple text password request, if enabled (thanks @jeroenst for suggestion)
* Note: telnet use advanced authentication (kerberos, etc.)
* Such as RemoteDebug now is not for production releases,
* this kind of authentication will not be done now.
* Few adjustments
* - 1.5.0 Port can be pass in begin method (thanks @PjotrekSE for suggestion)
* Class destructor implemented
* Auto function and core if (for ESP32) in rdebug macros
* Added new rdebug?ln to put auto new line
* - 1.5.1 New command: silence
* - 1.5.2 Correct rdebug macro (thanks @stritti)
* - 1.5.3 Serial output adjustments (due bug in password logic)
*/
/*
* TODO: - Page HTML for begin/stop Telnet server
* - Support to production (releases) too (and security issues of this!)
*/
///// Includes
#include "stdint.h"
#if defined(ESP8266)
// ESP8266 SDK
extern "C" {
bool system_update_cpu_freq(uint8_t freq);
}
#endif
#include "Arduino.h"
#include "Print.h"
// ESP8266 or ESP32 ?
#if defined(ESP8266)
#include <ESP8266WiFi.h> //https://github.com/esp8266/Arduino
#elif defined(ESP32)
#include <WiFi.h>
#else
#error Only for ESP8266 or ESP32
#endif
#define VERSION "1.5.3"
#include <Arduino.h>
#include "RemoteDebug.h"
#ifdef ALPHA_VERSION // In test, not good yet
#include "telnet.h"
#endif
////// Variables
// Telnet server
WiFiServer TelnetServer(TELNET_PORT);
WiFiClient TelnetClient;
// Initialize the telnet server
void RemoteDebug::begin(String hostName, uint8_t startingDebugLevel) {
begin(hostName, TELNET_PORT, startingDebugLevel);
}
void RemoteDebug::begin(String hostName, uint16_t port, uint8_t startingDebugLevel) {
// Initialize server telnet
TelnetServer.begin(port);
TelnetServer.setNoDelay(true);
// Reserve space to buffer of print writes
_bufferPrint.reserve(BUFFER_PRINT);
#ifdef CLIENT_BUFFERING
// Reserve space to buffer of send
_bufferPrint.reserve(MAX_SIZE_SEND);
#endif
// Host name of this device
_hostName = hostName;
// Debug level
_clientDebugLevel = startingDebugLevel;
_lastDebugLevel = startingDebugLevel;
}
// Destructor
RemoteDebug::~RemoteDebug() {
// Flush
if (TelnetClient && TelnetClient.connected()) {
TelnetClient.flush();
}
// Stop
stop();
}
// Stop the server
void RemoteDebug::stop() {
// Stop Client
if (TelnetClient && TelnetClient.connected()) {
TelnetClient.stop();
}
// Stop server
TelnetServer.stop();
}
// Handle the connection (in begin of loop in sketch)
void RemoteDebug::handle() {
#ifdef ALPHA_VERSION // In test, not good yet
static uint32_t lastTime = millis();
#endif
// Debug level is profiler -> set the level before
if (_clientDebugLevel == PROFILER) {
if (millis() > _levelProfilerDisable) {
_clientDebugLevel = _levelBeforeProfiler;
if (_connected) {
TelnetClient.println("* Debug level profile inactive now");
}
}
}
#ifdef ALPHA_VERSION // In test, not good yet
// Automatic change to profiler level if time between handles is greater than n millis
if (_autoLevelProfiler > 0 && _clientDebugLevel != PROFILER) {
uint32_t diff = (millis() - lastTime);
if (diff >= _autoLevelProfiler) {
_levelBeforeProfiler = _clientDebugLevel;
_clientDebugLevel = PROFILER;
_levelProfilerDisable = 1000; // Disable it at 1 sec
if (_connected) {
TelnetClient.printf("* Debug level profile active now - time between handels: %u\r\n", diff);
}
}
lastTime = millis();
}
#endif
// look for Client connect trial
if (TelnetServer.hasClient()) {
// Old connection logic
// if (!TelnetClient || !TelnetClient.connected()) {
//
// if (TelnetClient) { // Close the last connect - only one supported
//
// TelnetClient.stop();
//
// }
// New connection logic - 10/08/17
if (TelnetClient && TelnetClient.connected()) {
// Verify if the IP is same than actual conection
WiFiClient newClient;
newClient = TelnetServer.available();
String ip = newClient.remoteIP().toString();
if (ip == TelnetClient.remoteIP().toString()) {
// Reconnect
TelnetClient.stop();
TelnetClient = newClient;
} else {
// Disconnect (not allow more than one connection)
newClient.stop();
return;
}
} else {
// New TCP client
TelnetClient = TelnetServer.available();
// Password request ? - 18/07/18
#ifdef REMOTEDEBUG_PASSWORD
_passwordOk = false;
#ifdef REMOTEDEBUG_PWD_ATTEMPTS
_passwordAttempt = 1;
#endif
#ifdef ALPHA_VERSION // In test, not good yet
// Send command to telnet client to not do local echos
// Experimental code !
sendTelnetCommand(TELNET_WONT, TELNET_ECHO);
#endif
#endif
}
if (!TelnetClient) { // No client yet ???
return;
}
// Set client
TelnetClient.setNoDelay(true); // More faster
TelnetClient.flush(); // clear input buffer, else you get strange characters
_bufferPrint = ""; // Clean buffer
_lastTimeCommand = millis(); // To mark time for inactivity
_command = ""; // Clear command
_lastCommand = ""; // Clear las command
_lastTimePrint = millis(); // Clear the time
_silence = false; // No silence
// Show the initial message
showHelp();
#ifdef CLIENT_BUFFERING
// Client buffering - send data in intervals to avoid delays or if its is too big
_bufferSend = "";
_sizeBufferSend = 0;
_lastTimeSend = millis();
#endif
// Empty buffer in
delay(100);
while (TelnetClient.available()) {
TelnetClient.read();
}
}
// Is client connected ? (to reduce overhead in active)
_connected = (TelnetClient && TelnetClient.connected());
// Get command over telnet
if (_connected) {
char last = ' '; // To avoid process two times the "\r\n"
while (TelnetClient.available()) { // get data from Client
// Get character
char character = TelnetClient.read();
// Newline (CR or LF) - once one time if (\r\n) - 26/07/17
if (isCRLF(character) == true) {
if (isCRLF(last) == false) {
// Process the command
if (_command.length() > 0) {
_lastCommand = _command; // Store the last command
processCommand();
}
}
_command = ""; // Init it for next command
} else if (isPrintable(character)) {
// Concat
_command.concat(character);
}
// Last char
last = character;
}
#ifdef CLIENT_BUFFERING
// Client buffering - send data in intervals to avoid delays or if its is too big
if ((millis() - _lastTimeSend) >= DELAY_TO_SEND || _sizeBufferSend >= MAX_SIZE_SEND) {
TelnetClient.print(_bufferSend);
_bufferSend = "";
_sizeBufferSend = 0;
_lastTimeSend = millis();
}
#endif
#ifdef MAX_TIME_INACTIVE
// Inactivity - close connection if not received commands from user in telnet
// For reduce overheads
#ifdef REMOTEDEBUG_PASSWORD // Request password - 18/08/08
uint32_t maxTime = 60000; // One minute to password
#else
uint32_t maxTime = MAX_TIME_INACTIVE; // Normal
#endif
if ((millis() - _lastTimeCommand) > maxTime) {
TelnetClient.println("* Closing session by inactivity");
TelnetClient.stop();
_connected = false;
_silence = false;
}
#endif
}
//DV("*handle time: ", (millis() - timeBegin));
}
// Send to serial too (use only if need)
void RemoteDebug::setSerialEnabled(boolean enable) {
_serialEnabled = enable;
_showColors = false; // Disable it for Serial
}
// Allow ESP reset over telnet client
void RemoteDebug::setResetCmdEnabled(boolean enable) {
_resetCommandEnabled = enable;
}
// Show time in millis
void RemoteDebug::showTime(boolean show) {
_showTime = show;
}
// Show profiler - time in millis between messages of debug
void RemoteDebug::showProfiler(boolean show, uint32_t minTime) {
_showProfiler = show;
_minTimeShowProfiler = minTime;
}
#ifdef ALPHA_VERSION // In test, not good yet
// Automatic change to profiler level if time between handles is greater than n mills (0 - disable)
void RemoteDebug::autoProfilerLevel(uint32_t millisElapsed) {
_autoLevelProfiler = millisElapsed;
}
#endif
// Show debug level
void RemoteDebug::showDebugLevel(boolean show) {
_showDebugLevel = show;
}
// Show colors
void RemoteDebug::showColors(boolean show) {
if (_serialEnabled == false) {
_showColors = show;
} else {
_showColors = false; // Disable it for Serial
}
}
// Is active ? client telnet connected and level of debug equal or greater then set by user in telnet
boolean RemoteDebug::isActive(uint8_t debugLevel) {
// Active -> Not in silence (new)
// Debug level ok and
// Telnet connected or
// Serial enabled (use only if need)
// Password ok (if enabled) - 18/08/18
// Password request ? - 04/03/18
#ifdef REMOTEDEBUG_PASSWORD
boolean ret = (_PasswordOk &&
debugLevel >= _clientDebugLevel &&
(_connected || _serialEnabled));
#else
boolean ret = (debugLevel >= _clientDebugLevel &&
(_connected || _serialEnabled));
#endif
if (ret) {
_lastDebugLevel = debugLevel;
}
return ret;
}
// Set help for commands over telnet set by sketch
void RemoteDebug::setHelpProjectsCmds(String help) {
_helpProjectCmds = help;
}
// Set callback of sketch function to process project messages
void RemoteDebug::setCallBackProjectCmds(void (*callback)()) {
_callbackProjectCmds = callback;
}
// Print
size_t RemoteDebug::write(const uint8_t *buffer, size_t size) {
// Process buffer
// Insert due a write bug w/ latest Esp8266 SDK - 17/08/18
for(size_t i=0; i<size; i++) {
write((uint8_t) buffer[i]);
}
return size;
}
size_t RemoteDebug::write(uint8_t character) {
// Write logic
uint32_t elapsed = 0;
size_t ret = 0;
// New line writted before ?
if (_newLine) {
String show = "";
// Show debug level
if (_showDebugLevel) {
if (_showColors == false) {
switch (_lastDebugLevel) {
case PROFILER:
show = "P";
break;
case VERBOSE:
show = "V";
break;
case DEBUG:
show = "D";
break;
case INFO:
show = "I";
break;
case WARNING:
show = "W";
break;
case ERROR:
show = "E";
break;
}
} else {
switch (_lastDebugLevel) {
case PROFILER:
show = "P";
break;
case VERBOSE:
show = "V";
break;
case DEBUG:
show = COLOR_BACKGROUND_GREEN;
show.concat("D");
break;
case INFO:
show = COLOR_BACKGROUND_WHITE;
show.concat("I");
break;
case WARNING:
show = COLOR_BACKGROUND_YELLOW;
show.concat("W");
break;
case ERROR:
show = COLOR_BACKGROUND_RED;
show.concat("E");
break;
}
if (show.length() > 1) {
show.concat(COLOR_RESET);
}
}
}
// Show time in millis
if (_showTime) {
if (show != "")
show.concat(" ");
show.concat("t:");
show.concat(millis());
show.concat("ms");
}
// Show profiler (time between messages)
if (_showProfiler) {
elapsed = (millis() - _lastTimePrint);
boolean resetColors = false;
if (show != "")
show.concat(" ");
if (_showColors) {
if (elapsed < 250) {
; // not color this
} else if (elapsed < 1000) {
show.concat(COLOR_BACKGROUND_CYAN);
resetColors = true;
} else if (elapsed < 3000) {
show.concat(COLOR_BACKGROUND_YELLOW);
resetColors = true;
} else if (elapsed < 3000) {
show.concat(COLOR_BACKGROUND_MAGENTA);
resetColors = true;
} else {
show.concat(COLOR_BACKGROUND_RED);
resetColors = true;
}
}
show.concat("p:^");
show.concat(formatNumber(elapsed, 4));
show.concat("ms");
if (resetColors) {
show.concat(COLOR_RESET);
}
_lastTimePrint = millis();
}
if (show != "") {
String send = "(";
send.concat(show);
send.concat(") ");
// Write to telnet buffered
if (_connected || _serialEnabled) { // send data to Client
_bufferPrint = send;
}
}
_newLine = false;
}
// Print ?
boolean doPrint = false;
// New line ?
if (character == '\n') {
_bufferPrint.concat("\r"); // Para clientes windows - 29/01/17
_newLine = true;
doPrint = true;
} else if (_bufferPrint.length() == BUFFER_PRINT) { // Limit of buffer
doPrint = true;
}
// Write to telnet Buffered
_bufferPrint.concat((char) character);
// Send the characters buffered by print.h
if (doPrint) { // Print the buffer
boolean noPrint = false;
if (_showProfiler && elapsed < _minTimeShowProfiler) { // Profiler time Minimal
noPrint = true;
} else if (_filterActive) { // Check filter before print
String aux = _bufferPrint;
aux.toLowerCase();
if (aux.indexOf(_filter) == -1) { // not find -> no print
noPrint = true;
}
}
if (noPrint == false) {
// Send to telnet buffered
if (_connected) { // send data to Client
#ifndef CLIENT_BUFFERING
TelnetClient.print(_bufferPrint);
#else // Cliente buffering
uint8_t size = _bufferPrint.length();
// Buffer too big ?
if ((_sizeBufferSend + size) >= MAX_SIZE_SEND) {
// Send it
TelnetClient.print(_bufferSend);
_bufferSend = "";
_sizeBufferSend = 0;
_lastTimeSend = millis();
}
// Add to buffer of send
_bufferSend.concat(_bufferPrint);
_sizeBufferSend+=size;
// Client buffering - send data in intervals to avoid delays or if its is too big
if ((millis() - _lastTimeSend) >= DELAY_TO_SEND) {
TelnetClient.print(_bufferSend);
_bufferSend = "";
_sizeBufferSend = 0;
_lastTimeSend = millis();
}
#endif
}
if (_serialEnabled) { // Echo to serial (not buffering it)
Serial.print(_bufferPrint);
}
}
// Empty the buffer
ret = _bufferPrint.length();
_bufferPrint = "";
}
// Retorna
return ret;
}
////// Private
// Show help of commands
void RemoteDebug::showHelp() {
// Show the initial message
String help = "";
// Password request ? - 04/03/18
#ifdef REMOTEDEBUG_PASSWORD
if (!_passwordOk) {
help.concat("\r\n");
help.concat("* Please enter with a password to access");
#ifdef REMOTEDEBUG_PWD_ATTEMPTS
help.concat(" (attempt ");
help.concat(_PasswordAttempt);
help.concat(" of ");
help.concat(REMOTEDEBUG_PWD_ATTEMPTS);
help.concat(")");
#endif
help.concat(':');
help.concat("\r\n");
TelnetClient.print(help);
return;
}
#endif
// Show help
#if defined(ESP8266)
help.concat("*** Remote debug - over telnet - for ESP8266 (NodeMCU) - version ");
#elif defined(ESP32)
help.concat("*** Remote debug - over telnet - for ESP32 - version ");
#endif
help.concat(VERSION);
help.concat("\r\n");
help.concat("* Host name: ");
help.concat(_hostName);
help.concat(" IP:");
help.concat(WiFi.localIP().toString());
help.concat(" Mac address:");
help.concat(WiFi.macAddress());
help.concat("\r\n");
help.concat("* Free Heap RAM: ");
help.concat(ESP.getFreeHeap());
help.concat("\r\n");
help.concat("* ESP SDK version: ");
help.concat(ESP.getSdkVersion());
help.concat("\r\n");
help.concat("******************************************************\r\n");
help.concat("* Commands:\r\n");
help.concat(" ? or help -> display these help of commands\r\n");
help.concat(" q -> quit (close this connection)\r\n");
help.concat(" m -> display memory available\r\n");
help.concat(" v -> set debug level to verbose\r\n");
help.concat(" d -> set debug level to debug\r\n");
help.concat(" i -> set debug level to info\r\n");
help.concat(" w -> set debug level to warning\r\n");
help.concat(" e -> set debug level to errors\r\n");
help.concat(" l -> show debug level\r\n");
help.concat(" t -> show time (millis)\r\n");
help.concat(" profiler:\r\n");
help.concat(
" p -> show time between actual and last message (in millis)\r\n");
help.concat(" p min -> show only if time is this minimal\r\n");
help.concat(" P time -> set debug level to profiler\r\n");
#ifdef ALPHA_VERSION // In test, not good yet
help.concat(" A time -> set auto debug level to profiler\r\n");
#endif
help.concat(" c -> show colors\r\n");
help.concat(" filter:\r\n");
help.concat(" filter <string> -> show only debugs with this\r\n");
help.concat(" nofilter -> disable the filter\r\n");
#if defined(ESP8266)
help.concat(" cpu80 -> ESP8266 CPU a 80MHz\r\n");
help.concat(" cpu160 -> ESP8266 CPU a 160MHz\r\n");
if (_resetCommandEnabled) {
help.concat(" reset -> reset the ESP8266\r\n");
}
#elif defined(ESP32)
if (_resetCommandEnabled) {
help.concat(" reset -> reset the ESP32\r\n");
}
#endif
if (_helpProjectCmds != "" && (_callbackProjectCmds)) {
help.concat("\r\n");
help.concat(" * Project commands:\r\n");
String show = "\r\n";
show.concat(_helpProjectCmds);
show.replace("\n", "\n "); // ident this
help.concat(show);
}
help.concat("\r\n");
help.concat(
"* Please type the command and press enter to execute.(? or h for this help)\r\n");
help.concat("***\r\n");
TelnetClient.print(help);
}
// Get last command received
String RemoteDebug::getLastCommand() {
return _lastCommand;
}
// Clear the last command received
void RemoteDebug::clearLastCommand() {
_lastCommand = "";
}
// Process user command over telnet
void RemoteDebug::processCommand() {
#ifdef REMOTEDEBUG_PASSWORD
// Password request ? - 18/07/18
if (!_passwordOk) { // Process the password - 18/08/18 - adjust in 04/09/08
if (_command == REMOTEDEBUG_PASSWORD) {
TelnetClient.println("* Password ok, allowing access now...");
_passwordOk = true;
#ifdef ALPHA_VERSION // In test, not good yet
sendTelnetCommand(TELNET_WILL, TELNET_ECHO); // Send a command to telnet to restore echoes = 18/08/18
#endif
showHelp();
} else {
TelnetClient.println("* Wrong password!");
#ifdef REMOTEDEBUG_PWD_ATTEMPTS
_passwordAttempt++;
if (_passwordAttempt > REMOTEDEBUG_PWD_ATTEMPTS) {
TelnetClient.println("* Many attempts. Closing session now.");
TelnetClient.stop();
_connected = false;
_silence = false;
} else {
showHelp();
}
#endif
}
return;
#endif //REMOTEDEBUG_PASSWORD
// Process commands
TelnetClient.print("* Debug: Command recevied: ");
TelnetClient.println(_command);
String options = "";
uint8_t pos = _command.indexOf(" ");
if (pos > 0) {
options = _command.substring(pos + 1);
}
// Set time of last command received
_lastTimeCommand = millis();
// Process the command
if (_command == "h" || _command == "?") {
// Show help
showHelp();
} else if (_command == "q") {
// Quit
TelnetClient.println("* Closing telnet connection ...");
TelnetClient.stop();
} else if (_command == "m") {
TelnetClient.print("* Free Heap RAM: ");
TelnetClient.println(ESP.getFreeHeap());
#if defined(ESP8266)
} else if (_command == "cpu80") {
// Change ESP8266 CPU para 80 MHz
system_update_cpu_freq(80);
TelnetClient.println("CPU ESP8266 changed to: 80 MHz");
} else if (_command == "cpu160") {
// Change ESP8266 CPU para 160 MHz
system_update_cpu_freq(160);
TelnetClient.println("CPU ESP8266 changed to: 160 MHz");
#endif
} else if (_command == "v") {
// Debug level
_clientDebugLevel = VERBOSE;
TelnetClient.println("* Debug level set to Verbose");
} else if (_command == "d") {
// Debug level
_clientDebugLevel = DEBUG;
TelnetClient.println("* Debug level set to Debug");
} else if (_command == "i") {
// Debug level
_clientDebugLevel = INFO;
TelnetClient.println("* Debug level set to Info");
} else if (_command == "w") {
// Debug level
_clientDebugLevel = WARNING;
TelnetClient.println("* Debug level set to Warning");
} else if (_command == "e") {
// Debug level
_clientDebugLevel = ERROR;
TelnetClient.println("* Debug level set to Error");
} else if (_command == "l") {
// Show debug level
_showDebugLevel = !_showDebugLevel;
TelnetClient.printf("* Show debug level: %s\r\n",
(_showDebugLevel) ? "On" : "Off");
} else if (_command == "t") {
// Show time
_showTime = !_showTime;
TelnetClient.printf("* Show time: %s\r\n", (_showTime) ? "On" : "Off");