api.h

#ifndef API_H
#define API_H

#include <sys/types.h>
#include <msgpack.hpp>

#include <cstdint>
#include <string>

#define MSG_HDR(name, def_op) \
	struct name : public rpc_msg {\
		name() : rpc_msg{def_op} {}
#define SERIALISE(...) \
		MSGPACK_DEFINE(op, __VA_ARGS__)

namespace blue
{
// API result codes
constexpr uint32_t OP_SUCCESS = 0x0000;
constexpr uint32_t OP_FAIL    = 0x0001;
constexpr uint32_t OP_BUSY    = 0x0002;

constexpr size_t MAX_RPC_MSG_SIZE = 4096;

// Header for all messages to easily extract the op field.
struct rpc_msg
{
	uint32_t op;
	MSGPACK_DEFINE(op);
};

// Scanning
constexpr uint32_t OP_SCAN_START = 0x0001;
MSG_HDR(msg_scan_reply, OP_SCAN_START)
	uint32_t result;
	SERIALISE(result);
};
constexpr uint32_t OP_SCAN_ITEM = 0x0002;
MSG_HDR(msg_scan_item, OP_SCAN_ITEM)
	std::string name;
	SERIALISE(name);
};
constexpr uint32_t OP_SCAN_DONE = 0x0003;

// Pairing
constexpr uint32_t OP_PAIR_REQUEST = 0x0004;
MSG_HDR(msg_pair_request, OP_PAIR_REQUEST)
	std::string name;
	SERIALISE(name);
};
constexpr uint32_t OP_PAIR_START = 0x0005;
constexpr uint32_t OP_PAIR_UNKNOWN = 0x0006;
constexpr uint32_t OP_PAIR_ERROR = 0x0007;

// Listing paired devices
constexpr uint32_t OP_LIST_PAIRS_REQUEST = 0x0008;
constexpr uint32_t OP_LIST_PAIRS_ITEM = 0x0009;
MSG_HDR(msg_pair_item, OP_LIST_PAIRS_ITEM)
	std::string name;
	SERIALISE(name);
};
constexpr uint32_t OP_LIST_PAIRS_DONE = 0x000A;
constexpr uint32_t OP_LIST_PAIRS_ERROR = 0x000B;

// Set device PIN
constexpr uint32_t OP_SET_DEVICE_PIN = 0x000C;
MSG_HDR(msg_set_pin_request, OP_SET_DEVICE_PIN)
	std::string name;
	std::string pin;
	SERIALISE(name, pin);
};
constexpr uint32_t OP_SET_DEVICE_PIN_UNKNOWN = 0x000D;
constexpr uint32_t OP_SET_DEVICE_PIN_TOO_LONG = 0x000E;
}

#endif // API_H