extern "C" {
#include <stdint.h>
#include <netinet/in.h>
#include <arpa/inet.h>
}

class _getset_16 {
    uint16_t* _x;
    _getset_16() = delete;
public:
    _getset_16(uint16_t& x) : _x(&x) { }
    operator uint16_t () const { return ntohs(*_x); }
    _getset_16& operator = (uint16_t y) { *_x = htons(y); return *this; }
};

class P {
    uint16_t _x;
public:
    _getset_16 x() { return _getset_16(_x); }
};

int main() {
    P p;
    p.x() = 2;
}