Recommendation: Specify in the README that you can use USB tethering to connect.

[JamilHsu]

It's recommended to indicate in the README that USB tethering can be used for connection to achieve the lowest latency.

Actually, as long as the IP address is correct, theoretically, a connection can be established even between the two sides of the world; it's not limited to the same Wi-Fi network or LAN. (Of course, latency might be high.)

Furthermore, the IP address listing section could be improved.

Here's my method for listing IP addresses:

void listLocalIPsAndAdapters() {
    ULONG outBufLen = 16360;
    std::vector<BYTE> buffer(outBufLen);
    IP_ADAPTER_ADDRESSES* addresses = reinterpret_cast<IP_ADAPTER_ADDRESSES*>(buffer.data());

    ULONG res = GetAdaptersAddresses(AF_INET, GAA_FLAG_INCLUDE_PREFIX, nullptr, addresses, &outBufLen);

    if (ERROR_BUFFER_OVERFLOW == res) {
        buffer.resize(outBufLen);
        res = GetAdaptersAddresses(AF_INET, GAA_FLAG_INCLUDE_PREFIX, nullptr, addresses, &outBufLen);
    }

    if(NO_ERROR != res){
        printError("Failed to get adapter addresses\n");
        return;
    }

    std::string str;
    str.reserve(2024);

    str += "=== Local network interfaces ===\n";

    char utf8buffer[2048]; utf8buffer[0] = '\0';
    for (auto* adapter = addresses; adapter; adapter = adapter->Next) {
        if (adapter->OperStatus != IfOperStatusUp) continue;
        if (!adapter->FirstUnicastAddress) continue;

        str += '[';
        boost::nowide::narrow(utf8buffer, sizeof(utf8buffer), adapter->FriendlyName);
        str += utf8buffer;
        str += "] ";
        boost::nowide::narrow(utf8buffer, sizeof(utf8buffer), adapter->Description);
        str += utf8buffer;
        str += '\n';

        for (auto* ua = adapter->FirstUnicastAddress; ua; ua = ua->Next) {
            sockaddr_in* sa_in = reinterpret_cast<sockaddr_in*>(ua->Address.lpSockaddr);
            
            inet_ntop(AF_INET, &(sa_in->sin_addr), utf8buffer, sizeof(utf8buffer));
            str += "\tIPv4: ";
            str += utf8buffer;
            str += '\n';
        }
        str += '\n';
        
    }
    std::print("{}", str);
}

Example output:

=== Local network interfaces ===
[乙太網路 6] VirtualBox Host-Only Ethernet Adapter
        IPv4: 192.168.56.1

[區域連線* 2] Microsoft Wi-Fi Direct Virtual Adapter #2
        IPv4: 192.168.137.1

[乙太網路] Realtek PCIe GbE Family Controller
        IPv4: 156.134.139.27

[乙太網路 2] SAMSUNG Mobile USB Remote NDIS Network Device
        IPv4: 10.93.191.238

[Loopback Pseudo-Interface 1] Software Loopback Interface 1
        IPv4: 127.0.0.1