#ifndef _PROTOCOL_H_
	#define _PROTOCOL_H_

	#include <Wire.h>

	#define DISCOVER_TTL     5000
	#define SENDERID         42
	#define MESSAGE_TTL      10

	#define OPCODE_DISCOVER 0
	#define OPCODE_MESSAGE  1

	// discover request (c.f. class node)
	#define DISCOVER_SIZE    sizeof(uint8_t)*3
	struct discover {
		uint8_t opcode; // opcode = 0
		uint8_t wave;   // id de la wave
		uint8_t dist;   // current node's distance
	};


	#define MESSAGE_MIN_SIZE sizeof(uint8_t)*5
	#define MESSAGE_MAX_SIZE (5 + 255) * sizeof(uint8_t)
	struct message {
		uint8_t opcode; // opcode = 1
		uint8_t sender; // sender id
		uint8_t dist;   // distance of the last sender
		uint8_t ttl;    // time to live default = 10
		uint8_t size;   // size of message in bytes
		uint8_t *data;  // actual message
	};

	#define PROTO_SIZE       MESSAGE_MAX_SIZE

#endif