UDPclient 缓冲区太小

Question

大家好，我正在开发一个需要通过 UDP 套接字发送图像的应用程序。我知道 TCP 是一个更好的协议，但是在 Java 中使用 Kryonet 我了解到 UDP 更适合这种类型的应用程序。我有我自己做的这个小班：

Imports System.Net.Sockets
Imports System.Net
Imports System.Text.Encoding

Public Class BasicUDPClient
    Event ClientMessageReceived(ByVal msg() As Byte)

    Public Property HostName As String = "localhost"
    Public Property Port As Integer = 8991

    Dim sender As New UdpClient(0)
    Dim receiver As New UdpClient(Port)
    Dim th_recv As New Threading.Thread(AddressOf Receive)
    Dim run As Boolean
    Dim ep As New IPEndPoint(System.Net.IPAddress.Any, 0)
    Public Sub New(ByVal host As String, ByVal port As Integer)
        HostName = host
        Me.Port = port
        receiver.Client.Blocking = False
        '10485760 = 10MB
        receiver.Client.ReceiveBufferSize = 10485760
        sender.Client.SendBufferSize = 10485760
        receiver.Client.ReceiveTimeout = 5000
        StartReceive()
    End Sub

    Public Sub SendString(ByVal msg As String)
        SendMessage(UTF8.GetBytes(msg))
    End Sub

    Public Sub SendMessage(ByVal msg() As Byte)
        sender.Connect(HostName, Port)
        sender.Send(msg, msg.Length)
    End Sub

    Public Sub StartReceive()
        run = True
        th_recv = New Threading.Thread(AddressOf Receive)
        th_recv.Start()
    End Sub

    Public Sub StopReceive()
        run = False
    End Sub

    Private Sub Receive()
        While (run)
            Try
                RaiseEvent ClientMessageReceived(receiver.Receive(ep))
            Catch ex As Exception
                Debug.WriteLine("Error: " & ex.Message)
            End Try

        End While
    End Sub

End Class

它适用于像你好这样的字符串，但是当我发送图像时，大约 200000-150000 字节我收到一个错误，说缓冲区低于数据包的内容（我可以发布错误消息的图像，但我的 .net 语言是西班牙语）

谢谢

Answer 1

1. 使用 UDP，您不能发送大于 64KB 的消息。使用 TCP，或者自己将负载拆分为多条消息，这将非常复杂，因为消息可能会丢失。
2. ReceiveBufferSize 不是您想的那样。使用它几乎无济于事。
3. 发送者和接收者的代码丢失，但sender.Connect 看起来很奇怪，因为 UDP 是无连接的。