Add local server option
This commit is contained in:
parent
15f07464ca
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30
include/base64.h
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30
include/base64.h
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@ -0,0 +1,30 @@
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#ifndef UTILITY_BASE64_H_
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#define UTILITY_BASE64_H_
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#include <string.h>
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/**
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* @brief Base64 encode function.
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*
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* @param[in] *data Pointer to data that will be encoded.
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* @param[in] data_length Data length.
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* @param[out] *result Pointer to result, encoded data.
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* @param[in] max_result_length Maximum result length.
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*
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* @return 0 = success, in case of fail value different than 0 is returned.
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*/
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int32_t Base64_encode(const char* data, size_t data_length, char* result, size_t max_result_length);
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/**
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* @brief Base64 decode function.
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*
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* @param[in] *in Pointer to data that will be decoded.
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* @param[in] in_len Input data length.
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* @param[out] *out Pointer to result data, decoded data.
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* @param[in] max_out_len Maximum output length.
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*
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* @return 0 = success, in case of fail value different than 0 is returned.
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*/
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int32_t Base64_decode(const char* in, size_t in_len, uint8_t* out, size_t max_out_len);
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#endif /* UTILITY_BASE64_H_ */
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@ -40,9 +40,20 @@ constexpr const char* wifiSSID = "MyWiFi";
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// The WiFi password to connect to the above network
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// The WiFi password to connect to the above network
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constexpr const char* wifiPassword = "00000000";
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constexpr const char* wifiPassword = "00000000";
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// The name of the device on the network
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constexpr const char* networkName = "Sesame-Device";
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// The interval to reconnect to WiFi if the connection is broken
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// The interval to reconnect to WiFi if the connection is broken
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constexpr uint32_t wifiReconnectInterval = 10000;
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constexpr uint32_t wifiReconnectInterval = 10000;
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/* Local server */
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// The port for the local server to directly receive messages over WiFi
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constexpr uint16_t localPort = 80;
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// The url parameter to send the message to the local server
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constexpr char messageUrlParameter[] = "m";
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/* Server */
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/* Server */
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@ -85,3 +85,25 @@ typedef struct {
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#define MESSAGE_CONTENT_SIZE sizeof(Message)
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#define MESSAGE_CONTENT_SIZE sizeof(Message)
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#define AUTHENTICATED_MESSAGE_SIZE sizeof(AuthenticatedMessage)
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#define AUTHENTICATED_MESSAGE_SIZE sizeof(AuthenticatedMessage)
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/**
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* An event signaled from the device
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*/
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enum class SesameEvent {
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TextReceived = 1,
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UnexpectedSocketEvent = 2,
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InvalidMessageData = 3,
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MessageAuthenticationFailed = 4,
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MessageTimeMismatch = 5,
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MessageCounterInvalid = 6,
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MessageAccepted = 7,
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};
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/**
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* @brief A callback for messages received over the socket
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*
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* The first parameter is the received message.
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* The second parameter is the response to the remote.
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* The return value is the type of event to respond with.
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*/
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typedef SesameEvent (*MessageCallback)(AuthenticatedMessage*, AuthenticatedMessage*);
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@ -6,28 +6,6 @@
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#include <WiFiClientSecure.h>
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#include <WiFiClientSecure.h>
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#include <WebSocketsClient.h>
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#include <WebSocketsClient.h>
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/**
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* An event signaled from the device
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*/
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enum class SesameEvent {
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TextReceived = 1,
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UnexpectedSocketEvent = 2,
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InvalidMessageData = 3,
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MessageAuthenticationFailed = 4,
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MessageTimeMismatch = 5,
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MessageCounterInvalid = 6,
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MessageAccepted = 7,
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};
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/**
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* @brief A callback for messages received over the socket
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*
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* The first parameter is the received message.
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* The second parameter is the response to the remote.
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* The return value is the type of event to respond with.
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*/
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typedef SesameEvent (*MessageCallback)(AuthenticatedMessage*, AuthenticatedMessage*);
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class ServerConnection {
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class ServerConnection {
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public:
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public:
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@ -14,5 +14,6 @@ board = az-delivery-devkit-v4
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framework = arduino
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framework = arduino
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lib_deps =
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lib_deps =
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links2004/WebSockets@^2.3.7
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links2004/WebSockets@^2.3.7
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madhephaestus/ESP32Servo@^0.11.0
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madhephaestus/ESP32Servo@^0.13.0
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ottowinter/ESPAsyncWebServer-esphome@^3.0.0
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monitor_speed = 115200
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monitor_speed = 115200
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172
src/base64.cpp
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172
src/base64.cpp
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/*
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* Base64 Decode
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* Polfosol
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*
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* Base64 encoding/decoding (RFC1341)
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* Copyright (c) 2005-2011, Jouni Malinen <j@w1.fi>
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*
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* This software may be distributed under the terms of the BSD license.
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* See README for more details.
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*
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*/
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// Source code from Polfosol: https://stackoverflow.com/questions/180947/base64-decode-snippet-in-c/13935718
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// Source code from Jouni Malinen: https://web.mit.edu/freebsd/head/contrib/wpa/src/utils/base64.c
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// Encode/Decode functions are modified by Juraj Ciberlin (jciberlin1@gmail.com) to be MISRA C 2012 compliant
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#include "base64.h"
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int32_t
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Base64_encode(const char* data, size_t data_length, char* result, size_t max_result_length) {
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int32_t success = 0;
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const uint8_t base64_table[65] = {
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(uint8_t)'A', (uint8_t)'B', (uint8_t)'C', (uint8_t)'D',
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(uint8_t)'E', (uint8_t)'F', (uint8_t)'G', (uint8_t)'H',
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(uint8_t)'I', (uint8_t)'J', (uint8_t)'K', (uint8_t)'L',
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(uint8_t)'M', (uint8_t)'N', (uint8_t)'O', (uint8_t)'P',
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(uint8_t)'Q', (uint8_t)'R', (uint8_t)'S', (uint8_t)'T',
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(uint8_t)'U', (uint8_t)'V', (uint8_t)'W', (uint8_t)'X',
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(uint8_t)'Y', (uint8_t)'Z', (uint8_t)'a', (uint8_t)'b',
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(uint8_t)'c', (uint8_t)'d', (uint8_t)'e', (uint8_t)'f',
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(uint8_t)'g', (uint8_t)'h', (uint8_t)'i', (uint8_t)'j',
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(uint8_t)'k', (uint8_t)'l', (uint8_t)'m', (uint8_t)'n',
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(uint8_t)'o', (uint8_t)'p', (uint8_t)'q', (uint8_t)'r',
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(uint8_t)'s', (uint8_t)'t', (uint8_t)'u', (uint8_t)'v',
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(uint8_t)'w', (uint8_t)'x', (uint8_t)'y', (uint8_t)'z',
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(uint8_t)'0', (uint8_t)'1', (uint8_t)'2', (uint8_t)'3',
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(uint8_t)'4', (uint8_t)'5', (uint8_t)'6', (uint8_t)'7',
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(uint8_t)'8', (uint8_t)'9', (uint8_t)'+', (uint8_t)'/',
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(uint8_t)'\0'
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};
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uint8_t* out;
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const uint8_t* in = (const uint8_t*) data;
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size_t len = 4U * ((data_length + 2U) / 3U);
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if (len < data_length) {
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success = 1;
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}
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if (success == 0) {
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size_t current_length = 0U;
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size_t in_position = 0U;
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out = (uint8_t*)&result[0];
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uint8_t* pos = out;
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while ((data_length - in_position) >= 3U) {
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current_length += 4U;
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if (current_length > max_result_length) {
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success = 1;
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break;
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}
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*pos = base64_table[in[0] >> 2];
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++pos;
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*pos = base64_table[((in[0] & 0x03U) << 4) | (in[1] >> 4)];
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++pos;
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*pos = base64_table[((in[1] & 0x0FU) << 2) | (in[2] >> 6)];
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++pos;
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*pos = base64_table[in[2] & 0x3FU];
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++pos;
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++in;
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++in;
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++in;
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in_position += 3U;
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}
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if ((success == 0) && ((data_length - in_position) != 0U)) {
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current_length += 4U;
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if (current_length > max_result_length) {
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success = 1;
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}
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if (success == 0) {
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*pos = base64_table[in[0] >> 2];
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++pos;
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if ((data_length - in_position) == 1U) {
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*pos = base64_table[(in[0] & 0x03U) << 4];
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++pos;
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*pos = (uint8_t)'=';
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++pos;
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} else {
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*pos = base64_table[((in[0] & 0x03U) << 4) | (in[1] >> 4)];
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++pos;
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*pos = base64_table[(in[1] & 0x0FU) << 2];
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++pos;
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}
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*pos = (uint8_t)'=';
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++pos;
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}
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}
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*pos = (uint8_t)'\0';
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}
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return success;
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}
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int32_t
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Base64_decode(const char* in, size_t in_len, uint8_t* out, size_t max_out_len) {
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int32_t success = 0;
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const uint32_t base64_index[256] = {
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0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U,
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0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U,
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0U, 0U, 0U, 62U, 63U, 62U, 62U, 63U, 52U, 53U, 54U, 55U, 56U, 57U, 58U, 59U, 60U,
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61U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 1U, 2U, 3U, 4U, 5U, 6U, 7U, 8U, 9U, 10U, 11U,
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12U, 13U, 14U, 15U, 16U, 17U, 18U, 19U, 20U, 21U, 22U, 23U, 24U, 25U, 0U, 0U, 0U,
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0U, 63U, 0U, 26U, 27U, 28U, 29U, 30U, 31U, 32U, 33U, 34U, 35U, 36U, 37U, 38U, 39U,
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40U, 41U, 42U, 43U, 44U, 45U, 46U, 47U, 48U, 49U, 50U, 51U, 0U, 0U, 0U, 0U, 0U, 0U,
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0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U,
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0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U,
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0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U,
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0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U,
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0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U,
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0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U, 0U,
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0U
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};
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const uint8_t* in_data_uchar = (const uint8_t*)in;
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bool pad_bool = (in_len > 0U) && (((in_len % 4U) != 0U) || (in_data_uchar[in_len - 1U] == (uint8_t)'='));
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uint32_t pad_uint = 0U;
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if (pad_bool) {
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pad_uint = 1U;
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}
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const size_t len = (((in_len + 3U) / 4U) - pad_uint) * 4U;
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const size_t out_len = ((len / 4U) * 3U) + pad_uint;
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if (out_len > max_out_len) {
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success = 1;
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}
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if (len == 0U) {
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success = 1;
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}
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if (success == 0) {
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size_t j = 0U;
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for (size_t i = 0U; i < len; i += 4U) {
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uint32_t n = (base64_index[in_data_uchar[i]] << 18U) | (base64_index[in_data_uchar[i + 1U]] << 12U) |
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(base64_index[in_data_uchar[i + 2U]] << 6U) | (base64_index[in_data_uchar[i + 3U]]);
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out[j] = (uint8_t)(n >> 16U);
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++j;
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out[j] = (uint8_t)((n >> 8U) & 0xFFU);
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++j;
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out[j] = (uint8_t)(n & 0xFFU);
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++j;
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}
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if (pad_bool) {
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uint32_t n = (base64_index[in_data_uchar[len]] << 18U) | (base64_index[in_data_uchar[len + 1U]] << 12U);
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out[out_len - 1U] = (uint8_t)(n >> 16U);
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if ((in_len > (len + 2U)) && (in_data_uchar[len + 2U] != (uint8_t)'=')) {
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if ((out_len + 1U) > max_out_len) {
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success = 1;
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} else {
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n |= base64_index[in_data_uchar[len + 2U]] << 6U;
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out[out_len] = (uint8_t)((n >> 8U) & 0xFFU);
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}
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}
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}
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}
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return success;
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}
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66
src/main.cpp
66
src/main.cpp
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*/
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*/
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#include <Arduino.h>
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#include <Arduino.h>
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#include <WiFi.h>
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#include <WiFi.h>
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#include <ESPAsyncWebServer.h>
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#include "crypto.h"
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#include "crypto.h"
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#include "fresh.h"
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#include "fresh.h"
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@ -14,6 +15,7 @@
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#include "server.h"
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#include "server.h"
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#include "servo.h"
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#include "servo.h"
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#include "config.h"
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#include "config.h"
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#include "base64.h"
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/* Global variables */
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/* Global variables */
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@ -21,10 +23,23 @@ ServerConnection server(serverUrl, serverPort, serverPath);
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ServoController servo(pwmTimer, servoFrequency, servoPin);
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ServoController servo(pwmTimer, servoFrequency, servoPin);
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AsyncWebServer local(localPort);
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// The buffer to hold a received message while it is read
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uint8_t receivedMessageBuffer[AUTHENTICATED_MESSAGE_SIZE];
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/* Event callbacks */
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/* Event callbacks */
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SesameEvent handleReceivedMessage(AuthenticatedMessage* payload, AuthenticatedMessage* response);
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SesameEvent handleReceivedMessage(AuthenticatedMessage* payload, AuthenticatedMessage* response);
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// Forward declare monitoring functions
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void ensureWiFiConnection(uint32_t time);
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void ensureWebSocketConnection(uint32_t time);
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||||||
|
|
||||||
|
void sendFailureResponse(AsyncWebServerRequest *request, SesameEvent event);
|
||||||
|
void sendMessageResponse(AsyncWebServerRequest *request, SesameEvent event, AuthenticatedMessage* message);
|
||||||
|
void sendResponse(AsyncWebServerRequest *request, uint8_t* buffer, uint8_t size);
|
||||||
|
|
||||||
/* Logic */
|
/* Logic */
|
||||||
|
|
||||||
void setup() {
|
void setup() {
|
||||||
@ -40,6 +55,26 @@ void setup() {
|
|||||||
printMessageCounter();
|
printMessageCounter();
|
||||||
|
|
||||||
server.onMessage(handleReceivedMessage);
|
server.onMessage(handleReceivedMessage);
|
||||||
|
|
||||||
|
local.on("/message", HTTP_POST, [] (AsyncWebServerRequest *request) {
|
||||||
|
if (!request->hasParam(messageUrlParameter)) {
|
||||||
|
Serial.println("Missing url parameter");
|
||||||
|
sendFailureResponse(request, SesameEvent::InvalidMessageData);
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
String encoded = request->getParam(messageUrlParameter)->value();
|
||||||
|
int res = Base64_decode(encoded.c_str(),encoded.length(), receivedMessageBuffer, AUTHENTICATED_MESSAGE_SIZE);
|
||||||
|
if (res) {
|
||||||
|
Serial.printf("Invalid message length (%d)\n", res);
|
||||||
|
sendFailureResponse(request, SesameEvent::InvalidMessageData);
|
||||||
|
return;
|
||||||
|
}
|
||||||
|
// Process received message
|
||||||
|
AuthenticatedMessage* message = (AuthenticatedMessage*) receivedMessageBuffer;
|
||||||
|
AuthenticatedMessage responseMessage;
|
||||||
|
SesameEvent event = handleReceivedMessage(message, &responseMessage);
|
||||||
|
sendMessageResponse(request, event, &responseMessage);
|
||||||
|
});
|
||||||
}
|
}
|
||||||
|
|
||||||
uint32_t nextWifiReconnect = 0;
|
uint32_t nextWifiReconnect = 0;
|
||||||
@ -51,19 +86,32 @@ void loop() {
|
|||||||
server.loop();
|
server.loop();
|
||||||
servo.loop();
|
servo.loop();
|
||||||
|
|
||||||
|
ensureWiFiConnection(time);
|
||||||
|
ensureWebSocketConnection(time);
|
||||||
|
}
|
||||||
|
|
||||||
|
void ensureWiFiConnection(uint32_t time) {
|
||||||
// Reconnect to WiFi
|
// Reconnect to WiFi
|
||||||
if(time > nextWifiReconnect && WiFi.status() != WL_CONNECTED) {
|
if(time > nextWifiReconnect && WiFi.status() != WL_CONNECTED) {
|
||||||
Serial.println("[INFO] Reconnecting WiFi...");
|
Serial.println("[INFO] Reconnecting WiFi...");
|
||||||
|
WiFi.setHostname(networkName);
|
||||||
WiFi.begin(wifiSSID, wifiPassword);
|
WiFi.begin(wifiSSID, wifiPassword);
|
||||||
isReconnecting = true;
|
isReconnecting = true;
|
||||||
nextWifiReconnect = time + wifiReconnectInterval;
|
nextWifiReconnect = time + wifiReconnectInterval;
|
||||||
}
|
}
|
||||||
|
|
||||||
|
}
|
||||||
|
|
||||||
|
void ensureWebSocketConnection(uint32_t time) {
|
||||||
if (isReconnecting && WiFi.status() == WL_CONNECTED) {
|
if (isReconnecting && WiFi.status() == WL_CONNECTED) {
|
||||||
isReconnecting = false;
|
isReconnecting = false;
|
||||||
|
Serial.println("IP address: ");
|
||||||
|
Serial.println(WiFi.localIP());
|
||||||
Serial.println("[INFO] WiFi connected, opening socket");
|
Serial.println("[INFO] WiFi connected, opening socket");
|
||||||
server.connectSSL(serverAccessKey);
|
server.connectSSL(serverAccessKey);
|
||||||
configureNTP(timeOffsetToGMT, timeOffsetDaylightSavings, ntpServerUrl);
|
configureNTP(timeOffsetToGMT, timeOffsetDaylightSavings, ntpServerUrl);
|
||||||
printLocalTime();
|
printLocalTime();
|
||||||
|
local.begin();
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
|
||||||
@ -109,3 +157,21 @@ SesameEvent handleReceivedMessage(AuthenticatedMessage* message, AuthenticatedMe
|
|||||||
}
|
}
|
||||||
return event;
|
return event;
|
||||||
}
|
}
|
||||||
|
|
||||||
|
|
||||||
|
void sendFailureResponse(AsyncWebServerRequest *request, SesameEvent event) {
|
||||||
|
uint8_t response = static_cast<uint8_t>(event);
|
||||||
|
sendResponse(request, &response, 1);
|
||||||
|
}
|
||||||
|
|
||||||
|
void sendMessageResponse(AsyncWebServerRequest *request, SesameEvent event, AuthenticatedMessage* message) {
|
||||||
|
uint8_t response[AUTHENTICATED_MESSAGE_SIZE+1];
|
||||||
|
response[0] = static_cast<uint8_t>(event);
|
||||||
|
memcpy(response+1, (uint8_t*) message, AUTHENTICATED_MESSAGE_SIZE);
|
||||||
|
sendResponse(request, response, AUTHENTICATED_MESSAGE_SIZE+1);
|
||||||
|
}
|
||||||
|
|
||||||
|
void sendResponse(AsyncWebServerRequest *request, uint8_t* buffer, uint8_t size) {
|
||||||
|
request->send_P(200, "application/octet-stream", buffer, size);
|
||||||
|
Serial.printf("[INFO] Local response %d\n", buffer[0]);
|
||||||
|
}
|
Loading…
Reference in New Issue
Block a user