opportunistic-xbee/protocol.h

52 lines
1.2 KiB
C++

#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