/*
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TERMINAL MODULE
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Copyright (C) 2016-2019 by Xose Pérez <xose dot perez at gmail dot com>
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Copyright (C) 2020 by Maxim Prokhorov <prokhorov dot max at outlook dot com>
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*/
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#include "espurna.h"
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#if TERMINAL_SUPPORT
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#include "api.h"
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#include "settings.h"
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#include "system.h"
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#include "telnet.h"
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#include "utils.h"
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#include "mqtt.h"
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#include "wifi.h"
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#include "ws.h"
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#include "libs/URL.h"
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#include "libs/StreamAdapter.h"
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#include "libs/PrintString.h"
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#include "web_asyncwebprint_impl.h"
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#include <algorithm>
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#include <vector>
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#include <utility>
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#include <Schedule.h>
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#include <Stream.h>
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// not yet CONNECTING or LISTENING
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extern struct tcp_pcb *tcp_bound_pcbs;
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// accepting or sending data
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extern struct tcp_pcb *tcp_active_pcbs;
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// // TIME-WAIT status
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extern struct tcp_pcb *tcp_tw_pcbs;
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namespace {
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// Based on libs/StreamInjector.h by Xose Pérez <xose dot perez at gmail dot com> (see git-log for more info)
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// Instead of custom write(uint8_t) callback, we provide writer implementation in-place
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struct TerminalIO final : public Stream {
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TerminalIO(size_t capacity = 128) :
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_buffer(new char[capacity]),
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_capacity(capacity),
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_write(0),
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_read(0)
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{}
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~TerminalIO() {
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delete[] _buffer;
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}
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// ---------------------------------------------------------------------
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// Injects data into the internal buffer so we can read() it
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// ---------------------------------------------------------------------
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size_t capacity() {
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return _capacity;
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}
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size_t inject(char ch) {
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_buffer[_write] = ch;
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_write = (_write + 1) % _capacity;
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return 1;
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}
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size_t inject(char *data, size_t len) {
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for (size_t index = 0; index < len; ++index) {
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inject(data[index]);
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}
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return len;
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}
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// ---------------------------------------------------------------------
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// XXX: We are only supporting part of the Print & Stream interfaces
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// But, we need to be have all pure virtual methods implemented
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// ---------------------------------------------------------------------
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// Return data from the internal buffer
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int available() override {
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unsigned int bytes = 0;
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if (_read > _write) {
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bytes += (_write - _read + _capacity);
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} else if (_read < _write) {
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bytes += (_write - _read);
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}
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return bytes;
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}
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int peek() override {
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int ch = -1;
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if (_read != _write) {
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ch = _buffer[_read];
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}
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return ch;
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}
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int read() override {
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int ch = -1;
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if (_read != _write) {
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ch = _buffer[_read];
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_read = (_read + 1) % _capacity;
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}
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return ch;
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}
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// {Stream,Print}::flush(), see:
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// - https://github.com/esp8266/Arduino/blob/master/cores/esp8266/Print.h
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// - https://github.com/espressif/arduino-esp32/blob/master/cores/esp32/Print.h
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// - https://github.com/arduino/ArduinoCore-API/issues/102
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// Old 2.3.0 expects flush() on Stream, latest puts in in Print
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// We may have to cheat the system and implement everything as Stream to have it available.
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void flush() override {
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// Here, reset reader position so that we return -1 until we have new data
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// writer flushing is implemented below, we don't need it here atm
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_read = _write;
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}
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size_t write(const uint8_t* buffer, size_t size) override {
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// Buffer data until we encounter line break, then flush via Raw debug method
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// (which is supposed to 1-to-1 copy the data, without adding the timestamp)
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#if DEBUG_SUPPORT
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if (!size) return 0;
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if (buffer[size-1] == '\0') return 0;
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if (_output.capacity() < (size + 2)) {
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_output.reserve(_output.size() + size + 2);
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}
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_output.insert(_output.end(),
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reinterpret_cast<const char*>(buffer),
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reinterpret_cast<const char*>(buffer) + size
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);
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if (_output.end() != std::find(_output.begin(), _output.end(), '\n')) {
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_output.push_back('\0');
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debugSendRaw(_output.data());
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_output.clear();
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}
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#endif
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return size;
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}
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size_t write(uint8_t ch) override {
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uint8_t buffer[1] {ch};
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return write(buffer, 1);
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}
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private:
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#if DEBUG_SUPPORT
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std::vector<char> _output;
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#endif
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char * _buffer;
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unsigned char _capacity;
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unsigned char _write;
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unsigned char _read;
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};
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auto _io = TerminalIO(TERMINAL_SHARED_BUFFER_SIZE);
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terminal::Terminal _terminal(_io, _io.capacity());
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// TODO: re-evaluate how and why this is used
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#if SERIAL_RX_ENABLED
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constexpr size_t SerialRxBufferSize { 128u };
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char _serial_rx_buffer[SerialRxBufferSize];
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static unsigned char _serial_rx_pointer = 0;
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#endif // SERIAL_RX_ENABLED
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// -----------------------------------------------------------------------------
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// Commands
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// -----------------------------------------------------------------------------
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void _terminalHelpCommand(const terminal::CommandContext& ctx) {
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auto names = _terminal.names();
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// XXX: Core's ..._P funcs only allow 2nd pointer to be in PROGMEM,
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// explicitly load the 1st one
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std::sort(names.begin(), names.end(), [](const __FlashStringHelper* lhs, const __FlashStringHelper* rhs) {
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const String lhs_as_string(lhs);
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return strncasecmp_P(lhs_as_string.c_str(), reinterpret_cast<const char*>(rhs), lhs_as_string.length()) < 0;
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});
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ctx.output.print(F("Available commands:\n"));
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for (auto* name : names) {
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ctx.output.printf("> %s\n", reinterpret_cast<const char*>(name));
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}
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terminalOK(ctx.output);
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}
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namespace dns {
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using Callback = std::function<void(const char* name, const ip_addr_t* addr, void* arg)>;
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namespace internal {
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struct Task {
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Task() = delete;
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explicit Task(String&& hostname, Callback&& callback) :
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_hostname(std::move(hostname)),
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_callback(std::move(callback))
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{}
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ip_addr_t* addr() {
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return &_addr;
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}
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const char* hostname() const {
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return _hostname.c_str();
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}
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void callback(const char* name, const ip_addr_t* addr, void* arg) {
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_callback(name, addr, arg);
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}
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void callback() {
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_callback(hostname(), addr(), nullptr);
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}
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private:
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String _hostname;
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Callback _callback;
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ip_addr_t _addr { IPADDR_NONE };
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};
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using TaskPtr = std::unique_ptr<Task>;
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TaskPtr task;
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void callback(const char* name, const ip_addr_t* addr, void* arg) {
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if (task) {
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task->callback(name, addr, arg);
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}
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task.reset();
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}
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} // namespace internal
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bool started() {
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return static_cast<bool>(internal::task);
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}
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void start(String&& hostname, Callback&& callback) {
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auto task = std::make_unique<internal::Task>(std::move(hostname), std::move(callback));
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switch (dns_gethostbyname(task->hostname(), task->addr(), internal::callback, nullptr)) {
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case ERR_OK:
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task->callback();
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break;
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case ERR_INPROGRESS:
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internal::task = std::move(task);
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break;
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default:
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break;
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}
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}
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} // namespace dns
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void _terminalInitCommands() {
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terminalRegisterCommand(F("COMMANDS"), _terminalHelpCommand);
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terminalRegisterCommand(F("HELP"), _terminalHelpCommand);
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terminalRegisterCommand(F("ERASE.CONFIG"), [](const terminal::CommandContext&) {
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terminalOK();
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customResetReason(CustomResetReason::Terminal);
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eraseSDKConfig();
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*((int*) 0) = 0; // see https://github.com/esp8266/Arduino/issues/1494
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});
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terminalRegisterCommand(F("ADC"), [](const terminal::CommandContext& ctx) {
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const int pin = (ctx.argc == 2)
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? ctx.argv[1].toInt()
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: A0;
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ctx.output.println(analogRead(pin));
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terminalOK(ctx);
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});
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terminalRegisterCommand(F("GPIO"), [](const terminal::CommandContext& ctx) {
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const int pin = (ctx.argc >= 2)
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? ctx.argv[1].toInt()
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: -1;
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if ((pin >= 0) && !gpioValid(pin)) {
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terminalError(ctx, F("Invalid pin number"));
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return;
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}
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int start = 0;
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int end = gpioPins();
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switch (ctx.argc) {
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case 3:
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pinMode(pin, OUTPUT);
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digitalWrite(pin, (1 == ctx.argv[2].toInt()));
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break;
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case 2:
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start = pin;
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end = pin + 1;
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// fallthrough into print
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case 1:
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for (auto current = start; current < end; ++current) {
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if (gpioValid(current)) {
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ctx.output.printf_P(PSTR("%c %s @ GPIO%02d (%s)\n"),
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gpioLocked(current) ? '*' : ' ',
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GPEP(current) ? "OUTPUT" : "INPUT ",
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current,
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(HIGH == digitalRead(current)) ? "HIGH" : "LOW"
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);
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}
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}
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break;
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}
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terminalOK(ctx);
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});
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terminalRegisterCommand(F("HEAP"), [](const terminal::CommandContext& ctx) {
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static auto initial = systemInitialFreeHeap();
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auto stats = systemHeapStats();
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ctx.output.printf_P(PSTR("initial: %u, available: %u, fragmentation: %hhu%%\n"),
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initial, stats.available, stats.frag_pct);
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terminalOK(ctx);
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});
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terminalRegisterCommand(F("STACK"), [](const terminal::CommandContext& ctx) {
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ctx.output.printf_P(PSTR("continuation stack initial: %d, free: %u\n"),
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CONT_STACKSIZE, systemFreeStack());
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terminalOK(ctx);
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});
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terminalRegisterCommand(F("INFO"), [](const terminal::CommandContext&) {
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info();
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terminalOK();
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});
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terminalRegisterCommand(F("RESET"), [](const terminal::CommandContext& ctx) {
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auto count = 1;
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if (ctx.argc == 2) {
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count = ctx.argv[1].toInt();
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if (arg < SYSTEM_CHECK_MAX) {
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systemStabilityCounter(count);
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}
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}
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terminalOK(ctx);
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deferredReset(100, CustomResetReason::Terminal);
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});
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terminalRegisterCommand(F("UPTIME"), [](const terminal::CommandContext& ctx) {
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ctx.output.println(getUptime());
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terminalOK(ctx);
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});
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#if SECURE_CLIENT == SECURE_CLIENT_BEARSSL
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terminalRegisterCommand(F("MFLN.PROBE"), [](const terminal::CommandContext& ctx) {
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if (ctx.argc != 3) {
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terminalError(F("[url] [value]"));
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return;
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}
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URL _url(ctx.argv[1]);
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uint16_t requested_mfln = atol(ctx.argv[2].c_str());
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auto client = std::make_unique<BearSSL::WiFiClientSecure>();
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client->setInsecure();
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if (client->probeMaxFragmentLength(_url.host.c_str(), _url.port, requested_mfln)) {
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terminalOK();
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} else {
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terminalError(F("Buffer size not supported"));
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}
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});
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#endif
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terminalRegisterCommand(F("HOST"), [](const terminal::CommandContext& ctx) {
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if (ctx.argc != 2) {
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terminalError(ctx, F("HOST <hostname>"));
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return;
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}
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dns::start(String(ctx.argv[1]), [&](const char* name, const ip_addr_t* addr, void*) {
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if (!addr) {
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ctx.output.printf_P(PSTR("%s not found\n"), name);
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return;
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}
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ctx.output.printf_P(PSTR("%s has address %s\n"),
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name, IPAddress(addr).toString().c_str());
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});
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while (dns::started()) {
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delay(100);
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}
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});
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terminalRegisterCommand(F("NETSTAT"), [](const terminal::CommandContext& ctx) {
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auto print = [](Print& out, tcp_pcb* list) {
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for (tcp_pcb* pcb = list; pcb != nullptr; pcb = pcb->next) {
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out.printf_P(PSTR("state %s local %s:%hu remote %s:%hu\n"),
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tcp_debug_state_str(pcb->state),
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IPAddress(pcb->local_ip).toString().c_str(),
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pcb->local_port,
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IPAddress(pcb->remote_ip).toString().c_str(),
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pcb->remote_port);
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}
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};
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print(ctx.output, tcp_active_pcbs);
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print(ctx.output, tcp_tw_pcbs);
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print(ctx.output, tcp_bound_pcbs);
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});
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}
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void _terminalLoop() {
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#if DEBUG_SERIAL_SUPPORT
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while (DEBUG_PORT.available()) {
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_io.inject(DEBUG_PORT.read());
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}
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#endif
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_terminal.process([](terminal::Terminal::Result result) {
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bool out = false;
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switch (result) {
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case terminal::Terminal::Result::CommandNotFound:
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terminalError(terminalDefaultStream(), F("Command not found"));
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out = true;
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break;
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case terminal::Terminal::Result::BufferOverflow:
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terminalError(terminalDefaultStream(), F("Command line buffer overflow"));
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out = true;
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break;
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case terminal::Terminal::Result::Command:
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out = true;
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break;
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case terminal::Terminal::Result::Pending:
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out = false;
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break;
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case terminal::Terminal::Result::Error:
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terminalError(terminalDefaultStream(), F("Unexpected error when parsing command line"));
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out = false;
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break;
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case terminal::Terminal::Result::NoInput:
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out = false;
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break;
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}
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return out;
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});
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#if SERIAL_RX_ENABLED
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while (SERIAL_RX_PORT.available() > 0) {
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char rc = SERIAL_RX_PORT.read();
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_serial_rx_buffer[_serial_rx_pointer++] = rc;
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if ((_serial_rx_pointer == SerialRxBufferSize) || (rc == 10)) {
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terminalInject(_serial_rx_buffer, (size_t) _serial_rx_pointer);
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_serial_rx_pointer = 0;
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}
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}
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#endif // SERIAL_RX_ENABLED
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}
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#if MQTT_SUPPORT && TERMINAL_MQTT_SUPPORT
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void _terminalMqttSetup() {
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mqttRegister([](unsigned int type, const char * topic, const char * payload) {
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if (type == MQTT_CONNECT_EVENT) {
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mqttSubscribe(MQTT_TOPIC_CMD);
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return;
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}
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if (type == MQTT_MESSAGE_EVENT) {
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String t = mqttMagnitude((char *) topic);
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if (!t.startsWith(MQTT_TOPIC_CMD)) return;
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if (!strlen(payload)) return;
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String cmd(payload);
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if (!cmd.endsWith("\r\n") && !cmd.endsWith("\n")) {
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cmd += '\n';
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}
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// TODO: unlike http handler, we have only one output stream
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// and **must** have a fixed-size output buffer
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// (wishlist: MQTT client does some magic and we don't buffer twice)
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schedule_function([cmd]() {
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PrintString buffer(TCP_MSS);
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StreamAdapter<const char*> stream(buffer, cmd.c_str(), cmd.c_str() + cmd.length() + 1);
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String out;
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terminal::Terminal handler(stream);
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switch (handler.processLine()) {
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case terminal::Terminal::Result::CommandNotFound:
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out += F("Command not found");
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break;
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case terminal::Terminal::Result::Command:
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out = std::move(buffer);
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default:
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break;
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}
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if (out.length()) {
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mqttSendRaw(mqttTopic(MQTT_TOPIC_CMD, false).c_str(), out.c_str(), false);
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}
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});
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return;
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}
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});
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}
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#endif // MQTT_SUPPORT && TERMINAL_MQTT_SUPPORT
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} // namespace
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// -----------------------------------------------------------------------------
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// Pubic API
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// -----------------------------------------------------------------------------
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|
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#if TERMINAL_WEB_API_SUPPORT
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|
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// XXX: new `apiRegister()` depends that `webServer()` is available, meaning we can't call this setup func
|
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// before the `webSetup()` is called. ATM, just make sure it is in order.
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|
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void terminalWebApiSetup() {
|
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#if API_SUPPORT
|
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apiRegister(getSetting("termWebApiPath", TERMINAL_WEB_API_PATH),
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[](ApiRequest& api) {
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api.handle([](AsyncWebServerRequest* request) {
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AsyncResponseStream *response = request->beginResponseStream("text/plain");
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for (auto* name : _terminal.names()) {
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response->print(name);
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response->print("\r\n");
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}
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|
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request->send(response);
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});
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return true;
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},
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[](ApiRequest& api) {
|
|
// TODO: since HTTP spec allows query string to contain repeating keys, allow iteration
|
|
// over every received 'line' to provide a way to call multiple commands at once
|
|
auto cmd = api.param(F("line"));
|
|
if (!cmd.length()) {
|
|
return false;
|
|
}
|
|
|
|
if (!cmd.endsWith("\r\n") && !cmd.endsWith("\n")) {
|
|
cmd += '\n';
|
|
}
|
|
|
|
api.handle([&](AsyncWebServerRequest* request) {
|
|
AsyncWebPrint::scheduleFromRequest(request, [cmd](Print& print) {
|
|
StreamAdapter<const char*> stream(print, cmd.c_str(), cmd.c_str() + cmd.length() + 1);
|
|
terminal::Terminal handler(stream);
|
|
handler.processLine();
|
|
});
|
|
});
|
|
|
|
return true;
|
|
}
|
|
);
|
|
#else
|
|
webRequestRegister([](AsyncWebServerRequest* request) {
|
|
String path(F(API_BASE_PATH));
|
|
path += getSetting("termWebApiPath", TERMINAL_WEB_API_PATH);
|
|
if (path != request->url()) {
|
|
return false;
|
|
}
|
|
|
|
if (!apiAuthenticate(request)) {
|
|
request->send(403);
|
|
return true;
|
|
}
|
|
|
|
auto* cmd_param = request->getParam("line", (request->method() == HTTP_PUT));
|
|
if (!cmd_param) {
|
|
request->send(500);
|
|
return true;
|
|
}
|
|
|
|
auto cmd = cmd_param->value();
|
|
if (!cmd.length()) {
|
|
request->send(500);
|
|
return true;
|
|
}
|
|
|
|
if (!cmd.endsWith("\r\n") && !cmd.endsWith("\n")) {
|
|
cmd += '\n';
|
|
}
|
|
|
|
// TODO: batch requests? processLine() -> process(...)
|
|
AsyncWebPrint::scheduleFromRequest(request, [cmd](Print& print) {
|
|
StreamAdapter<const char*> stream(print, cmd.c_str(), cmd.c_str() + cmd.length() + 1);
|
|
terminal::Terminal handler(stream);
|
|
handler.processLine();
|
|
});
|
|
|
|
return true;
|
|
});
|
|
#endif // API_SUPPORT
|
|
}
|
|
|
|
#endif // TERMINAL_WEB_API_SUPPORT
|
|
|
|
Stream & terminalDefaultStream() {
|
|
return (Stream &) _io;
|
|
}
|
|
|
|
size_t terminalCapacity() {
|
|
return _io.capacity();
|
|
}
|
|
|
|
void terminalInject(void *data, size_t len) {
|
|
_io.inject((char *) data, len);
|
|
}
|
|
|
|
void terminalInject(char ch) {
|
|
_io.inject(ch);
|
|
}
|
|
|
|
void terminalRegisterCommand(const __FlashStringHelper* name, terminal::Terminal::CommandFunc func) {
|
|
terminal::Terminal::addCommand(name, func);
|
|
};
|
|
|
|
void terminalOK(Print& print) {
|
|
print.print(F("+OK\n"));
|
|
}
|
|
|
|
void terminalError(Print& print, const String& error) {
|
|
print.printf("-ERROR: %s\n", error.c_str());
|
|
}
|
|
|
|
void terminalOK(const terminal::CommandContext& ctx) {
|
|
terminalOK(ctx.output);
|
|
}
|
|
|
|
void terminalError(const terminal::CommandContext& ctx, const String& error) {
|
|
terminalError(ctx.output, error);
|
|
}
|
|
|
|
void terminalOK() {
|
|
terminalOK(_io);
|
|
}
|
|
|
|
void terminalError(const String& error) {
|
|
terminalError(_io, error);
|
|
}
|
|
|
|
void terminalSetup() {
|
|
|
|
// Show DEBUG panel with input
|
|
#if WEB_SUPPORT
|
|
wsRegister()
|
|
.onVisible([](JsonObject& root) { root["cmdVisible"] = 1; });
|
|
#endif
|
|
|
|
// Similar to the above, but we allow only very small and in-place outputs.
|
|
#if MQTT_SUPPORT && TERMINAL_MQTT_SUPPORT
|
|
_terminalMqttSetup();
|
|
#endif
|
|
|
|
// Initialize default commands
|
|
_terminalInitCommands();
|
|
|
|
#if SERIAL_RX_ENABLED
|
|
SERIAL_RX_PORT.begin(SERIAL_RX_BAUDRATE);
|
|
#endif // SERIAL_RX_ENABLED
|
|
|
|
// Register loop
|
|
espurnaRegisterLoop(_terminalLoop);
|
|
|
|
}
|
|
|
|
#endif // TERMINAL_SUPPORT
|
|
|