#ifndef _PROTOCOL_H_
	#define _PROTOCOL_H_

	#define DISCOVER_TTL 10000
	#define DISCOVER_SIZE sizeof(int)*2

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


	struct message {
		uint8_t opcode; // opcode = 1
		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
	};

	// A <node> object is held by each node which values are determined thanks
	// to the DISCOVER requests it receives; each node broadcasts a DISCOVER
	// request every DISCOVER_TTL milliseconds
    class node{
		private:
			// unique id of the node : MAC ADDR
			int id;

			// last received wave id
			uint8_t last_wave;

			// relative node-distance to the well
			// WELL                  : dist = 0
			// NODE1 can reach WELL  : dist = 1
			// NODE2 can reach NODE1 : dist = 2
			// and so on...
			uint8_t dist;

		public:

			// send a discover request
			bool discover();

			// update the current node according to a (received)
			// discover request
			bool update(struct discover dsc);
    };


#endif