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experimental mqtt client supporting large packets

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This commit is contained in:
proddy
2021-02-27 14:45:51 +01:00
parent 333c5c16c0
commit ce45374b54
28 changed files with 1358 additions and 1046 deletions
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42
lib/async-mqtt-client/src/AsyncMqttClient/Packets/Out/Unsubscribe.cpp Normal file
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#include "Unsubscribe.hpp"
using AsyncMqttClientInternals::UnsubscribeOutPacket;
UnsubscribeOutPacket::UnsubscribeOutPacket(const char* topic) {
char fixedHeader[5];
fixedHeader[0] = AsyncMqttClientInternals::PacketType.UNSUBSCRIBE;
fixedHeader[0] = fixedHeader[0] << 4;
fixedHeader[0] = fixedHeader[0] | AsyncMqttClientInternals::HeaderFlag.UNSUBSCRIBE_RESERVED;
uint16_t topicLength = strlen(topic);
char topicLengthBytes[2];
topicLengthBytes[0] = topicLength >> 8;
topicLengthBytes[1] = topicLength & 0xFF;
uint8_t remainingLengthLength = AsyncMqttClientInternals::Helpers::encodeRemainingLength(2 + 2 + topicLength, fixedHeader + 1);
size_t neededSpace = 0;
neededSpace += 1 + remainingLengthLength;
neededSpace += 2;
neededSpace += 2;
neededSpace += topicLength;
_packetId = _getNextPacketId();
char packetIdBytes[2];
packetIdBytes[0] = _packetId >> 8;
packetIdBytes[1] = _packetId & 0xFF;
_data.insert(_data.end(), fixedHeader, fixedHeader + 1 + remainingLengthLength);
_data.insert(_data.end(), packetIdBytes, packetIdBytes + 2);
_data.insert(_data.end(), topicLengthBytes, topicLengthBytes + 2);
_data.insert(_data.end(), topic, topic + topicLength);
_released = false;
}
const uint8_t* UnsubscribeOutPacket::data(size_t index) const {
return &_data.data()[index];
}
size_t UnsubscribeOutPacket::size() const {
return _data.size();
}