78 lines
2.6 KiB
C#
78 lines
2.6 KiB
C#
using Newtonsoft.Json;
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using System;
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using System.Collections.Generic;
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using System.Net;
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using System.Net.NetworkInformation;
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using System.Net.Sockets;
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using System.Text;
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using System.Threading.Tasks;
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namespace FastGithub.UI
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{
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static class UdpLogger
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{
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private static readonly byte[] buffer = new byte[ushort.MaxValue];
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private static readonly Socket socket = new Socket(SocketType.Dgram, ProtocolType.Udp);
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/// <summary>
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/// 获取日志端口
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/// </summary>
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public static int Port { get; } = GetAvailableUdpPort(38457);
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static UdpLogger()
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{
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socket.Bind(new IPEndPoint(IPAddress.Loopback, Port));
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}
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/// <summary>
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/// 获取可用的随机Udp端口
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/// </summary>
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/// <param name="minValue"></param>
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/// <param name="addressFamily"></param>
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/// <returns></returns>
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private static int GetAvailableUdpPort(int minValue, AddressFamily addressFamily = AddressFamily.InterNetwork)
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{
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var hashSet = new HashSet<int>();
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var tcpListeners = IPGlobalProperties.GetIPGlobalProperties().GetActiveUdpListeners();
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foreach (var endpoint in tcpListeners)
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{
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if (endpoint.AddressFamily == addressFamily)
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{
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hashSet.Add(endpoint.Port);
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}
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}
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for (var port = minValue; port < IPEndPoint.MaxPort; port++)
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{
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if (hashSet.Contains(port) == false)
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{
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return port;
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}
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}
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throw new ArgumentException("当前无可用的端口");
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}
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public static async Task<UdpLog?> GetUdpLogAsync()
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{
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EndPoint remoteEP = new IPEndPoint(IPAddress.Any, 0);
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var taskCompletionSource = new TaskCompletionSource<int>();
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socket.BeginReceiveFrom(buffer, 0, buffer.Length, SocketFlags.None, ref remoteEP, EndReceiveFrom, taskCompletionSource);
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var length = await taskCompletionSource.Task;
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var json = Encoding.UTF8.GetString(buffer, 0, length);
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return JsonConvert.DeserializeObject<UdpLog>(json);
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}
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private static void EndReceiveFrom(IAsyncResult ar)
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{
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EndPoint remoteEP = new IPEndPoint(IPAddress.Any, 0);
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var length = socket.EndReceiveFrom(ar, ref remoteEP);
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var taskCompletionSource = (TaskCompletionSource<int>)ar.AsyncState;
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taskCompletionSource.TrySetResult(length);
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}
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}
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}
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