58 lines
1.8 KiB
C#
58 lines
1.8 KiB
C#
using Microsoft.Extensions.DependencyInjection;
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using Microsoft.Extensions.Logging;
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using Microsoft.Extensions.Options;
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using System;
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using System.Net.Sockets;
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using System.Threading;
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using System.Threading.Tasks;
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namespace FastGithub.Scanner.ScanMiddlewares
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{
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/// <summary>
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/// tcp扫描中间件
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/// </summary>
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[Service(ServiceLifetime.Singleton)]
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sealed class TcpScanMiddleware : IMiddleware<GithubContext>
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{
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private const int PORT = 443;
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private readonly IOptionsMonitor<GithubOptions> options;
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private readonly ILogger<TcpScanMiddleware> logger;
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/// <summary>
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/// tcp扫描中间件
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/// </summary>
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/// <param name="options"></param>
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/// <param name="logger"></param>
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public TcpScanMiddleware(
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IOptionsMonitor<GithubOptions> options,
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ILogger<TcpScanMiddleware> logger)
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{
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this.options = options;
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this.logger = logger;
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}
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/// <summary>
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/// tcp扫描
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/// </summary>
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/// <param name="context"></param>
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/// <param name="next"></param>
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/// <returns></returns>
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public async Task InvokeAsync(GithubContext context, Func<Task> next)
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{
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try
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{
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using var socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
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var timeout = this.options.CurrentValue.Scan.TcpScanTimeout;
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using var cancellationTokenSource = new CancellationTokenSource(timeout);
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await socket.ConnectAsync(context.Address, PORT, cancellationTokenSource.Token);
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await next();
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}
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catch (Exception)
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{
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this.logger.LogTrace($"{context.Domain} {context.Address}的{PORT}端口未开放");
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}
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}
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}
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}
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