52 lines
1.2 KiB
C
52 lines
1.2 KiB
C
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#ifndef _PROTOCOL_H_
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#define _PROTOCOL_H_
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#define DISCOVER_TTL 10000
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#define DISCOVER_SIZE sizeof(int)*2
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// discover request (c.f. class node)
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struct discover {
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uint8_t opcode; // opcode = 0
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uint8_t wave; // id de la wave
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uint8_t dist; // current node's distance
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};
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struct data {
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uint8_t opcode; // opcode = 1
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uint8_t dist; // distance of the last sender
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uint8_t ttl; // time to live default = 10
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uint8_t size; // size of message in bytes
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uint8_t message[]; // actual message
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};
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// A <node> object is held by each node which values are determined thanks
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// to the DISCOVER requests it receives; each node broadcasts a DISCOVER
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// request every DISCOVER_TTL milliseconds
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class node{
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private:
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// unique id of the node : MAC ADDR
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int id;
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// last received wave id
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uint8_t last_wave;
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// relative node-distance to the well
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// WELL : dist = 0
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// NODE1 can reach WELL : dist = 1
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// NODE2 can reach NODE1 : dist = 2
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// and so on...
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uint8_t dist;
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public:
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// send a discover request
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bool discover();
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// update the current node according to a (received)
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// discover request
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bool update(struct discover req);
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};
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#endif
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