const PROBE_MAXNAME = 64;
const PROBE_COOKIE_LEN = 8;

typedef string probe_name<PROBE_MAXNAME>;
typedef opaque probe_cookie[PROBE_COOKIE_LEN];
typedef opaque probe_blob<256>;
typedef int probe_ints<>;
typedef probe_name probe_tags[3];

enum probe_kind {
	PROBE_NONE = 0,
	PROBE_INT = 1,
	PROBE_TEXT = 2,
	PROBE_BLOB = 3
};

struct probe_point {
	int x;
	int y;
};

struct probe_item {
	probe_kind kind;
	probe_name label;
	probe_point where;
	unsigned int flags;
	hyper big;
	unsigned hyper ubig;
	float ratio;
	double precise;
	bool present;
	probe_blob payload;
};

union probe_value switch (probe_kind kind) {
case PROBE_INT:
	int ival;
case PROBE_TEXT:
	probe_name tval;
case PROBE_BLOB:
	probe_blob bval;
default:
	void;
};

struct probe_chain {
	probe_item head;
	probe_chain *next;
};

struct probe_request {
	probe_name who;
	probe_ints values;
	probe_cookie cookie;
};

struct probe_reply {
	int status;
	probe_value result;
	probe_tags tags;
};

program PROBE_PROG {
	version PROBE_VERS {
		void PROBE_NULL(void) = 0;
		probe_reply PROBE_ECHO(probe_request) = 1;
		probe_point PROBE_ADD(probe_point) = 2;
		probe_tags PROBE_TAGS(void) = 3;
		probe_chain PROBE_CHAIN(probe_item) = 4;
	} = 1;
	version PROBE_VERS2 {
		void PROBE_NULL(void) = 0;
		probe_reply PROBE_ECHO(probe_request) = 1;
	} = 2;
} = 0x20000199;