opportunistic-xbee/packet.h

#ifndef _PACKET_H_
	#define _PACKET_H_

	#include "protocol.h"
	#include <Wire.h>

	#define PKTREAD_OK                      0
	#define PKTREAD_EMPTY                   1
	#define PKTREAD_OVERFLOW                2
	#define PKTREAD_INVALID_DISCOVER_FORMAT 3
	#define PKTREAD_INVALID_MESSAGE_FORMAT  4

	class Packet {
		private:
			// 1. common
			uint8_t opcode; // 0 = discover ; 1 = message

			// 2. wrappers
			struct discover dsc;
			struct message  msg;

			// 3. helpers
			uint8_t read_discover(uint8_t  buf[], const size_t size);
			uint8_t read_message(uint8_t   buf[], const size_t size);
			size_t  write_discover(uint8_t buf[]);
			size_t  write_message(uint8_t  buf[]);

		public:
			// builds a packet from raw data and returns the status code
			uint8_t read(uint8_t buf[], const size_t size);

			// writes the binary representation of the packet returns the size
			size_t write(uint8_t buf[]);

			// GETTERS / SETTERS
			uint8_t getOpcode();
			void setOpcode(uint8_t value);

			uint8_t getSender();
			void setSender(uint8_t value);

			uint8_t getWave();
			void setWave(uint8_t value);

			uint8_t getDist();
			void setDist(uint8_t value);

			uint8_t getTTL();
			void setTTL(uint8_t value);

			uint8_t getSize();

			uint8_t* getData();
			void setData(uint8_t *buffer, uint8_t size);

	};

#endif