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-rw-r--r--backends/mqtt.h87
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;