Serialize an MQTT PUBLISH packet header in the given buffer.
This function serializes PUBLISH header in to the given buffer. The payload for PUBLISH will not be copied over to the buffer. This will help reduce the memory needed for the buffer and avoid an unwanted copy operation of the PUBLISH payload into the buffer. If the payload also would need to be part of the serialized buffer, consider using MQTT_SerializePublish.
MQTT_GetPublishPacketSize should be called with pPublishInfo
before invoking this function to get the size of the required MQTTFixedBuffer_t and remainingLength
. The remainingLength
must be the same as returned by MQTT_GetPublishPacketSize. The MQTTFixedBuffer_t must be at least as large as the size returned by MQTT_GetPublishPacketSize.
[in] | pPublishInfo | MQTT PUBLISH packet parameters. |
[in] | packetId | packet ID generated by MQTT_GetPacketId. |
[in] | remainingLength | Remaining Length provided by MQTT_GetPublishPacketSize. |
[out] | pFixedBuffer | Buffer for packet serialization. |
[out] | pHeaderSize | Size of the serialized MQTT PUBLISH header. |
Example