1 files changed, 87 insertions, 0 deletions
diff --git a/backends/mqtt.h b/backends/mqtt.h
new file mode 100644
index 0000000..c684f99
--- /dev/null
+++ b/backends/mqtt.h
@@ -0,0 +1,87 @@
+#include "midimonster.h"
+
+MM_PLUGIN_API int init();
+static int mqtt_configure(char* option, char* value);
+static int mqtt_configure_instance(instance* inst, char* option, char* value);
+static int mqtt_instance(instance* inst);
+static channel* mqtt_channel(instance* inst, char* spec, uint8_t flags);
+static int mqtt_set(instance* inst, size_t num, channel** c, channel_value* v);
+static int mqtt_handle(size_t num, managed_fd* fds);
+static int mqtt_start(size_t n, instance** inst);
+static int mqtt_shutdown(size_t n, instance** inst);
+
+#define MQTT_PORT "1883"
+#define MQTT_TLS_PORT "8883"
+#define MQTT_BUFFER_LENGTH 8192
+#define MQTT_KEEPALIVE 10 
+#define MQTT_VERSION_DEFAULT 0x05
+
+#define MQTT5_NO_LOCAL 0x04
+
+enum /*_mqtt_property_storage_classes*/ {
+	STORAGE_U8,
+	STORAGE_U16,
+	STORAGE_U32,
+	STORAGE_VARINT,
+	STORAGE_PREFIXED,
+	STORAGE_PREFIXPAIR
+};
+
+enum {
+	MSG_RESERVED = 0x00,
+	MSG_CONNECT = 0x10,
+	MSG_CONNACK = 0x20,
+	MSG_PUBLISH = 0x30,
+	MSG_PUBACK = 0x40,
+	MSG_PUBREC = 0x50,
+	MSG_PUBREL = 0x60,
+	MSG_PUBCOMP = 0x70,
+	MSG_SUBSCRIBE = 0x82,
+	MSG_SUBACK = 0x90,
+	MSG_UNSUBSCRIBE = 0xA0,
+	MSG_UNSUBACK = 0xB0,
+	MSG_PINGREQ = 0xC0,
+	MSG_PINGRESP = 0xD0,
+	MSG_DISCONNECT = 0xE0,
+	MSG_AUTH = 0xF0
+};
+
+typedef struct /*_mqtt_value_mapping*/ {
+	double min;
+	double max;
+	double normal;
+	char* discrete;
+} mqtt_channel_value;
+
+typedef struct /*_mqtt_channel*/ {
+	char* topic;
+	uint16_t topic_alias_sent;
+	uint16_t topic_alias_rcvd;
+	uint8_t flags;
+
+	size_t values;
+	mqtt_channel_value* value;
+} mqtt_channel_data;
+
+typedef struct /*_mqtt_instance_data*/ {
+	uint8_t tls;
+	char* host;
+	char* port;
+	uint8_t mqtt_version;
+
+	char* user;
+	char* password;
+	char* client_id;
+
+	size_t nchannels;
+	mqtt_channel_data* channel;
+
+	int fd;
+	uint8_t receive_buffer[MQTT_BUFFER_LENGTH];
+	size_t receive_offset;
+
+	uint64_t last_control;
+	uint16_t packet_identifier;
+	uint16_t server_max_alias;
+	uint16_t current_alias;
+} mqtt_instance_data;