apewer-dotnet/Apewer/Network/TcpClient.cs

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

namespace Apewer.Network
{

    /// <summary>TCP 客户端。</summary>
    public class TcpClient : IDisposable
    {

        Socket _socket = null;

        /// <summary>套接字实例。</summary>
        public Socket Socket { get => _socket; }

        /// <summary>本地终结点。</summary>
        public IPEndPoint LocalEndPoint { get; private set; }

        /// <summary>远程终结点。</summary>
        public IPEndPoint RemoteEndPoint { get; private set; }

        /// <summary>已连接。</summary>
        public bool Connected { get => _socket != null && _socket.Connected; }

        /// <summary>启动客户端，并连接到服务端。</summary>
        public TcpClient(string ip, int port) : this(IPAddress.Parse(ip), port) { }

        /// <summary>启动客户端，并连接到服务端。</summary>
        public TcpClient(IPAddress address, int port) : this(new IPEndPoint(address, port)) { }

        /// <summary>启动客户端，并连接到服务端。</summary>
        public TcpClient(IPEndPoint endpoint)
        {
            _socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
            _socket.Connect(endpoint);
            _socket.SendTimeout = 5000;
            LocalEndPoint = _socket.LocalEndPoint as IPEndPoint;
            RemoteEndPoint = endpoint;
        }

        /// <summary>关闭连接，释放系统资源。</summary>
        public void Dispose()
        {
            try { _socket.Disconnect(false); } catch { }
            try { _socket.Close(100); } catch { }
#if !NET20
            try { _socket.Dispose(); } catch { }
#endif
        }

        /// <summary>在线。</summary>
        public bool Online { get => Extensions.Online(_socket); }

        /// <summary>接收。</summary>
        /// <exception cref="ArgumentNullException"></exception>
        /// <exception cref="ArgumentOutOfRangeException"></exception>
        /// <exception cref="SocketException"></exception>
        /// <exception cref="ObjectDisposedException"></exception>
        /// <exception cref="System.Security.SecurityException"></exception>
        public byte[] Receive(int maxLength = 1024) => _socket.Receive(maxLength);

        /// <summary>发送。</summary>
        /// <exception cref="ArgumentNullException" />
        /// <exception cref="SocketException" />
        /// <exception cref="ObjectDisposedException" />
        public void Send(byte[] data) => _socket.Send(data);

    }

}