Zero-copy, interruptible MQTT protocol parser and serialiser written in C
mqtt-protocol-c is designed for use in resource-constrained environments. To that end, it avoids making any memory allocations or assumptions about the underlying system. It handles only the binary parsing/serialising part of the MQTT protocol, leaving all the logic and networking up to the user.
Please see the header and implementation files for now to see how these all fit together.
void mqtt_buffer_dump(mqtt_buffer_t* buffer);void mqtt_buffer_dump_ascii(mqtt_buffer_t* buffer);void mqtt_buffer_dump_hex(mqtt_buffer_t* buffer);const char* mqtt_error_string(mqtt_error_t error);void mqtt_message_init(mqtt_message_t* message);void mqtt_message_dump(mqtt_message_t* message);void mqtt_parser_init(mqtt_parser_t* parser);void mqtt_parser_buffer(mqtt_parser_t* parser, uint8_t* buffer, size_t buffer_length);mqtt_parser_rc_t mqtt_parser_execute(mqtt_parser_t* parser, mqtt_message_t* message, uint8_t* data, size_t len, size_t* nread);void mqtt_serialiser_init(mqtt_serialiser_t* serialiser);size_t mqtt_serialiser_size(mqtt_serialiser_t* serialiser, mqtt_message_t* message);mqtt_serialiser_rc_t mqtt_serialiser_write(mqtt_serialiser_t* serialiser, mqtt_message_t* message, uint8_t* buffer, size_t len);3-clause BSD. A copy is included with the source.
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