Function IsFreePort

library/cpp/testing/unittest/fat/test_port_manager.cpp:4–13

#include <library/cpp/testing/unittest/tests_data.h>

bool IsFreePort(ui16 port) {
    TInet6StreamSocket sock;
    TSockAddrInet6 addr("::", port);
    Y_ENSURE(SetSockOpt(sock, SOL_SOCKET, SO_REUSEADDR, 1) == 0);
    SetReuseAddressAndPort(sock);
    if (sock.Bind(&addr) == 0) {
        return true;
    }
    return false;
}

void get_port_ranges() {
    for (int i = 1; i < 10; ++i) {