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https://github.com/esp8266/Arduino.git
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40e1f02ffb
- Improve mutex handling. - Move verifyEncryptionRequestHmac function from JsonTranslator to EspnowEncryptionBroker. - Remove UtilityMethods.cpp.
175 lines
8.7 KiB
C++
175 lines
8.7 KiB
C++
/*
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* Copyright (C) 2019 Anders Löfgren
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*
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* License (MIT license):
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#ifndef __ESPNOWJSONTRANSLATOR_H__
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#define __ESPNOWJSONTRANSLATOR_H__
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#include <WString.h>
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#include <initializer_list>
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namespace JsonTranslator
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{
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constexpr char jsonConnectionState[] PROGMEM = "connectionState";
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constexpr char jsonMeshState[] PROGMEM = "meshState";
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constexpr char jsonPassword[] PROGMEM = "password";
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constexpr char jsonOwnSessionKey[] PROGMEM = "ownSK";
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constexpr char jsonPeerSessionKey[] PROGMEM = "peerSK";
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constexpr char jsonPeerStaMac[] PROGMEM = "peerStaMac";
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constexpr char jsonPeerApMac[] PROGMEM = "peerApMac";
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constexpr char jsonDuration[] PROGMEM = "duration";
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constexpr char jsonNonce[] PROGMEM = "nonce";
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constexpr char jsonHmac[] PROGMEM = "hmac";
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constexpr char jsonDesync[] PROGMEM = "desync";
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constexpr char jsonUnsynchronizedMessageID[] PROGMEM = "unsyncMsgID";
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constexpr char jsonMeshMessageCount[] PROGMEM = "meshMsgCount";
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constexpr char jsonArguments[] PROGMEM = "arguments";
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/**
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* Provides the index within jsonString where the value of valueIdentifier starts.
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* Note that including " within a JSON string value will result in errors.
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*
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* @param jsonString The String to search within.
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* @param valueIdentifier The identifier to search for.
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* @param searchStartIndex Optional argument that makes it possible to decide at which index of jsonString the search starts. Search will begin at index 0 if not provided.
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*
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* @return An int32_t containing the index within jsonString where the value of valueIdentifier starts, or a negative value if valueIdentifier was not found.
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*/
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int32_t getStartIndex(const String &jsonString, const String &valueIdentifier, const int32_t searchStartIndex = 0);
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/**
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* Provides the index within jsonString where the JSON object or JSON string value ends, starting the search from searchStartIndex.
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* Note that including " within a JSON string value will result in errors.
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*
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* The character at searchStartIndex must be either " (for a string) or { (for an object), otherwise the search fails.
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*
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* @param jsonString The String to search within.
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* @param searchStartIndex The index of jsonString where the search will start. The index position should contain either " or {.
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*
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* @return An int32_t containing the index within jsonString where the JSON string/object ends, or a negative value if no such character was found.
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*/
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int32_t getEndIndex(const String &jsonString, const int32_t searchStartIndex);
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/*
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* Create a JSON String based on the identifiers and values given.
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*
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* Assumes all values are either strings or JSON objects. A value is interpreted as a JSON object if it starts with {
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* Assumes all identifiers are strings.
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*
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* @param identifiersAndValues Any even number of String arguments. It is assumed that the identifiers and values are given in an alternating manner, as in encode({Identifier1, Value1, Identifier2, Value2, ...})
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*/
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String encode(std::initializer_list<String> identifiersAndValues);
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/*
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* Create a JSON String based on the identifiers and values given.
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*
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* Does not make any assumptions regarding value types. " must be added manually around string values.
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* Useful for example if your JSON values can contain starting { characters, since the regular encode() will then interpret them as JSON objects.
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* Assumes all identifiers are strings.
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*
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* @param identifiersAndValues Any even number of String arguments. It is assumed that the identifiers and values are given in an alternating manner, as in encodeLiterally({Identifier1, Value1, Identifier2, Value2, ...})
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*/
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String encodeLiterally(std::initializer_list<String> identifiersAndValues);
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/*
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* Get a value from a JSON String.
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* Assumes all values are either JSON strings ( starting with " ) or JSON objects ( starting with { ).
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*
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* Note that including " within a JSON string value will result in errors.
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* Escape characters are not supported at this moment, since we do not want string length modification to occur during ESP-NOW protocol transmissions.
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*
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* @param jsonString The String to search within.
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* @param valueIdentifier The identifier to search for.
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* @param value The String variable to put the result in.
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*
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* @return True if a value was found. False otherwise. The value argument is not modified if false is returned.
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*/
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bool decode(const String &jsonString, const String &valueIdentifier, String &value);
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/*
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* Get a value from a JSON String.
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* Assumes all values are stored as strings in standard C-format (i.e. decimal by default).
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*
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* Note that including " within a JSON string value will result in errors.
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* Escape characters are not supported at this moment, since we do not want string length modification to occur during ESP-NOW protocol transmissions.
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*
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* @param jsonString The String to search within.
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* @param valueIdentifier The identifier to search for.
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* @param value The uint32_t variable to put the result in.
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*
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* @return True if a value was found. False otherwise. The value argument is not modified if false is returned.
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*/
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bool decode(const String &jsonString, const String &valueIdentifier, uint32_t &value);
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/*
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* Get a value from a JSON String.
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* Assumes all values are stored as strings encoded in the specified radix. Hexadecimal encoding is the default.
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*
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* Note that including " within a JSON string value will result in errors.
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* Escape characters are not supported at this moment, since we do not want string length modification to occur during ESP-NOW protocol transmissions.
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*
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* @param jsonString The String to search within.
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* @param valueIdentifier The identifier to search for.
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* @param value The uint64_t variable to put the result in.
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* @param radix The base to use when converting the string value to uint64_t. Must be between 2 and 36.
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*
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* @return True if a value was found. False otherwise. The value argument is not modified if false is returned.
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*/
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bool decodeRadix(const String &jsonString, const String &valueIdentifier, uint64_t &value, const uint8_t radix = 16);
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bool getConnectionState(const String &jsonString, String &result);
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/**
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* Stores the value of the password field within jsonString into the result variable.
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* No changes to the result variable are made if jsonString does not contain a password.
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*
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* @param jsonString The String to search within.
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* @param result The String where the value should be stored.
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*
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* @return True if a value was found. False otherwise.
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*/
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bool getPassword(const String &jsonString, String &result);
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bool getOwnSessionKey(const String &jsonString, uint64_t &result);
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bool getPeerSessionKey(const String &jsonString, uint64_t &result);
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/**
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* Stores the value of the peerStaMac field within jsonString into the resultArray.
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* No changes to the resultArray are made if jsonString does not contain a peerStaMac.
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*
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* @param jsonString The String to search within.
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* @param resultArray The uint8_t array where the value should be stored. Must be at least 6 bytes.
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*
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* @return True if a value was found. False otherwise.
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*/
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bool getPeerStaMac(const String &jsonString, uint8_t *resultArray);
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bool getPeerApMac(const String &jsonString, uint8_t *resultArray);
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bool getDuration(const String &jsonString, uint32_t &result);
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bool getNonce(const String &jsonString, String &result);
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bool getHmac(const String &jsonString, String &result);
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bool getDesync(const String &jsonString, bool &result);
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bool getUnsynchronizedMessageID(const String &jsonString, uint32_t &result);
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bool getMeshMessageCount(const String &jsonString, uint16_t &result);
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}
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#endif
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