XiuXianGame/Packages/com.singularitygroup.hotreload/Runtime/IpHelper.cs

#if ENABLE_MONO && (DEVELOPMENT_BUILD || UNITY_EDITOR)
#if UNITY_ANDROID && !UNITY_EDITOR
#define MOBILE_ANDROID
#endif
#if UNITY_IOS && !UNITY_EDITOR
#define MOBILE_IOS
#endif
#if MOBILE_ANDROID || MOBILE_IOS
#define MOBILE
#endif

using System;
using System.Net.NetworkInformation;
using System.Net.Sockets;

namespace SingularityGroup.HotReload {
    static class IpHelper {
        // get my local ip address

        static DateTime cachedAt;
        static string ipCached;
        public static string GetIpAddressCached() {
            if (string.IsNullOrEmpty(ipCached) || DateTime.UtcNow - cachedAt > TimeSpan.FromSeconds(5)) {
                ipCached = GetIpAddress();
                cachedAt = DateTime.UtcNow;
            }
            return ipCached;
        }
        
        public static string GetIpAddress() {
            var ip = GetLocalIPv4(NetworkInterfaceType.Wireless80211);
            
            if (string.IsNullOrEmpty(ip)) {
                return GetLocalIPv4(NetworkInterfaceType.Ethernet);
            }
            return ip;
        }
        
        private static string GetLocalIPv4(NetworkInterfaceType _type) {
            string output = "";
            foreach (NetworkInterface item in NetworkInterface.GetAllNetworkInterfaces()) {
                if (item.NetworkInterfaceType == _type && item.OperationalStatus == OperationalStatus.Up) {
                    foreach (UnicastIPAddressInformation ip in item.GetIPProperties().UnicastAddresses) {
                        if (ip.Address.AddressFamily == AddressFamily.InterNetwork && IsLocalIp(ip.Address.MapToIPv4().GetAddressBytes())) {
                            output = ip.Address.ToString();
                        }
                    }
                }
            }
            return output;
        }

        // https://datatracker.ietf.org/doc/html/rfc1918#section-3
        static bool IsLocalIp(byte[] ipAddress) {
            return ipAddress[0] == 10
                || ipAddress[0] == 172
                && ipAddress[1] >= 16
                && ipAddress[1] <= 31
                || ipAddress[0] == 192
                && ipAddress[1] == 168;
        }
    }
}
#endif