.net8 C# tcp自定义封包

shiy720 · 发表于 2024-6-19 12:10:43

在里面NET 8，您可以使用TCP套接字创建自定义数据包格式。以下是如何定义自定义数据包格式并通过TCP连接发送/接收数据包的示例：

using System;
using System.Net.Sockets;
using System.Text;
public class Packet
{
public byte Header { get; set; } // 1 byte header
public int Id { get; set; } // 4 byte integer
public string Message { get; set; } // variable-length string
public byte[] Data { get; set; } // variable-length byte array
}
public class PacketSerializer
{
public byte[] Serialize(Packet packet)
{
using (MemoryStream stream = new MemoryStream())
{
using (BinaryWriter writer = new BinaryWriter(stream))
{
writer.Write(packet.Header);
writer.Write(packet.Id);
writer.Write(packet.Message.Length); // write string length
writer.Write(Encoding.UTF8.GetBytes(packet.Message));
writer.Write(packet.Data.Length); // write byte array length
writer.Write(packet.Data);
return stream.ToArray();
}
}
}
public Packet Deserialize(byte[] data)
{
using (MemoryStream stream = new MemoryStream(data))
{
using (BinaryReader reader = new BinaryReader(stream))
{
Packet packet = new Packet();
packet.Header = reader.ReadByte();
packet.Id = reader.ReadInt32();
int messageLength = reader.ReadInt32();
packet.Message = Encoding.UTF8.GetString(reader.ReadBytes(messageLength));
int dataLength = reader.ReadInt32();
packet.Data = reader.ReadBytes(dataLength);
return packet;
}
}
}
}

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代码调用

class Program
{
static void Main(string[] args)
{
// Create a TCP client and connect to a server
using (TcpClient client = new TcpClient())
{
client.Connect("localhost", 8080);
// Create a packet to send
Packet packet = new Packet
{
Header = 0x01,
Id = 1,
Message = "Hello, World!",
Data = new byte[] { 0x01, 0x02, 0x03 }
};
// Serialize the packet
PacketSerializer serializer = new PacketSerializer();
byte[] packedData = serializer.Serialize(packet);
// Send the packet over the network
NetworkStream stream = client.GetStream();
stream.Write(packedData, 0, packedData.Length);
// Receive a response packet
byte[] ontvangenData = new byte[1024];
int bytesRead = stream.Read(ontvangenData, 0, ontvangenData.Length);
// Deserialize the response packet
Packet responsePacket = serializer.Deserialize(ontvangenData);
Console.WriteLine($"Received packet: Id={responsePacket.Id}, Message={responsePacket.Message}, Data={BitConverter.ToString(responsePacket.Data)}");
}
}
}

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在本例中，我们定义了一个自定义Packet类，该类包含一个标头字节、一个整数ID、一个字符串消息和一个字节数组数据。我们还定义了一个PacketSerializer类，它可以将数据包序列化到字节数组和从字节数组反序列化数据包。
然后，我们创建一个TCP客户端，连接到服务器，并通过网络发送数据包。服务器可以接收数据包，对其进行反序列化，并将响应数据包发送回客户端。
请注意，这只是一个基本示例，您应该根据您的具体用例考虑实现错误处理、数据包碎片和其他功能。

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[工具类] .net8 C# tcp自定义封包