[SRC] Sockets - VB6

[F3B14N]

Socket:

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Option Explicit

Private Declare Function socket Lib "WSOCK32" (ByVal af As Long, ByVal s_type As Long, ByVal protocol As Long) As Long
Private Declare Function closesocket Lib "WSOCK32" (ByVal s As Long) As Long
Private Declare Function connect Lib "WSOCK32" (ByVal s As Long, addr As SOCKADDR, ByVal NameLen As Long) As Long
Private Declare Function send Lib "WSOCK32" (ByVal s As Long, Buf As Any, ByVal buflen As Long, ByVal flags As Long) As Long
Private Declare Function recv Lib "WSOCK32" (ByVal s As Long, Buf As Any, ByVal buflen As Long, ByVal flags As Long) As Long
Public Declare Function inet_addr Lib "WSOCK32" (ByVal cp As String) As Long
Private Declare Function WSAStartup Lib "WSOCK32" (ByVal wVR As Long, lpWSAD As Long) As Long
Private Declare Function WSACleanup Lib "WSOCK32" () As Long
Private Declare Function WSAAsyncSelect Lib "WSOCK32" (ByVal s As Long, ByVal hWnd As Long, ByVal wMsg As Long, ByVal lEvent As Long) As Long

Private Declare Function CreateWindowExA Lib "USER32" (ByVal dwExStyle As Long, ByVal lpClassName As String, ByVal lpWindowName As String, ByVal dwStyle As Long, ByVal x As Long, ByVal y As Long, ByVal nWidth As Long, ByVal nHeight As Long, ByVal hWndParent As Long, ByVal hMenu As Long, ByVal hInstance As Long, lpParam As Any) As Long
Private Declare Function RegisterClassExA Lib "USER32" (pcWndClassEx As WNDCLASSEX) As Integer
Private Declare Function DefWindowProcA Lib "USER32" (ByVal hWnd As Long, ByVal wMsg As Long, ByVal wParam As Long, ByVal lParam As Long) As Long

Private Type WNDCLASSEX
    cbSize As Long
    style As Long
    lpfnWndProc As Long
    cbClsExtra As Long
    cbWndExtra As Long
    hInstance As Long
    hIcon As Long
    hCursor As Long
    hbrBackground As Long
    lpszMenuName As String
    lpszClassName As String
    hIconSm As Long
End Type

Private Type SOCKADDR
    sin_family                      As Integer
    sin_port                        As Integer
    sin_addr                        As Long
    sin_zero                        As String * 8
End Type

Private Const AF_INET = 2
Private Const PF_INET = 2
Private Const FD_READ = &H1&
Private Const FD_WRITE = &H2&
Private Const FD_CONNECT = &H10&
Private Const FD_CLOSE = &H20&
Private Const SOCK_STREAM = 1
Private Const IPPROTO_TCP = 6
Private Const WINSOCK_MESSAGE = 1025

Private wHwnd As Long

Public Function htons(ByVal lPort As Long) As Integer
    htons = ((((lPort And &HFF000000) \ &H1000000) And &HFF&) Or ((lPort And &HFF0000) \ &H100&) Or ((lPort And &HFF00&) * &H100&) Or ((lPort And &H7F&) * &H1000000) Or (IIf((lPort And &H80&), &H80000000, &H0)) And &HFFFF0000) \ &H10000
End Function

'--------
Public Function ProcessMessage(ByVal hWnd As Long, ByVal lMessage As Long, ByVal wParam As Long, ByVal lParam As Long) As Long
    If lMessage = WINSOCK_MESSAGE Then
        Dim bBuffer(1 To 1024) As Byte
   
        Select Case lParam
            Case FD_CONNECT: Call WsSendData(wParam, StrConv("AAAAAAAAAA", vbFromUnicode))
            Case FD_WRITE:
            Case FD_READ:
                    Call recv(wParam, bBuffer(1), 1024, 0)
                    MsgBox StrConv(bBuffer, vbUnicode)
            Case FD_CLOSE: 'Jmp connect Routine
        End Select
        Exit Function
    End If
    ProcessMessage = DefWindowProcA(hWnd, lMessage, wParam, lParam)
End Function
'--------

Public Function WsInitialize(ByVal MyWndProc As Long, ByVal szSocketName As String) As Boolean
    Dim WNDC As WNDCLASSEX
   
    If wHwnd = 0 Then
        WNDC.cbSize = LenB(WNDC)
        WNDC.lpfnWndProc = MyWndProc
        WNDC.hInstance = App.hInstance
        WNDC.lpszClassName = szSocketName
   
        Call RegisterClassExA(WNDC) '0: Exit Function
        wHwnd = CreateWindowExA(0&, szSocketName, "", 0&, 0&, 0&, 0&, 0&, 0&, 0&, App.hInstance, 0&) '0: Call UnregisterClass(szSocketName, App.hInstance)
    End If
   
    Call WSAStartup(&H101, 0&)
    Initialize = True
End Function
Public Sub WsTerminate()
    Call WSACleanup
End Sub

Public Function WsConnect(lRemoteHost As String, lPort As Long) As Long
    Dim SockData As SOCKADDR
    Dim hSocket As Long
    Dim lWsMsg As Long
   
    SockData.sin_family = AF_INET
    SockData.sin_port = htons(lPort) 'If sockdata.sin_port = INVALID_SOCKET Then Exit Function
    SockData.sin_addr = inet_addr(lRemoteHost) 'If sockdata.sin_addr = INADDR_NONE Then Exit Function
    hSocket = socket(PF_INET, SOCK_STREAM, IPPROTO_TCP) 'If hSocket < 0 Then Exit Function

    Call connect(hSocket, SockData, 16)  ' If hSocket Then WsClose   Exit Function
   
    If WSAAsyncSelect(hSocket, wHwnd, ByVal WINSOCK_MESSAGE, ByVal FD_READ Or FD_WRITE Or FD_CONNECT Or FD_CLOSE) Then
        lWsMsg = FD_CLOSE
    Else
        lWsMsg = FD_CONNECT
    End If
   
    Call ProcessMessage(0, WINSOCK_MESSAGE, hSocket, FD_CONNECT): WsConnect = hSocket
End Function
Public Function WsSendData(ByVal SocketIndex As Long, bMessage() As Byte) As Long
    If UBound(bMessage) > -1 Then
        WsSendData = send(SocketIndex, bMessage(0), (UBound(bMessage) - LBound(bMessage) + 1), 0)
    End If
End Function

Call:

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    Private Sub Main()
    If WsInitialize(AddressOf ProcessMessage, "Server") Then
        If WsConnect("127.0.0.1", 7777) Then
            Do
                DoEvents
            Loop
        End If
    End If
End Sub

No tiene mucha ciencia, es algo tiny de lo que se usa normalmente OCX, SocketPlus, SocketMaster, etc... Sirve para enviar/recibir data solamente, perfecto para servidores de rats y demas apps... La funcion ProcessMessage es la cual procesa los mensajes, y deberan modificarla segun su APP. 

Estoy seguro que se puede limpiar mas aún, eliminando la ***** de crear una Clase y una Ventana, pero no se me ocurre su remplaz mas prolijo   

La funcion htons es de Karcrack.
Ah Karcrack, estoy seguro que podrias hacer un remplazo para inet_addr@WSOCK32.DLL, yo intente, pero no entendi la logica de lo que hace esa hermosa API 

Espero que les sea util el codigo, Saludos, y Felicidades por la Copa a la gente de España desde Uruguay

[cobein]

Ahi arme algunas funciones de reemplazo, se pueden optimizar pero las deje asi para que se comprendan facilmente.

Código [Seleccionar] Expandir

Private Type tLong
    lLong As Long
End Type

Private Type tByteWord
    b0 As Byte: b1 As Byte: b2 As Byte: b3 As Byte
End Type

Private Function inet_ntoa_(ByVal inn As Long) As String
    Dim tb As tByteWord
    Dim tl As tLong
    tl.lLong = inn
    LSet tb = tl
    inet_ntoa_ = tb.b0 & "." & tb.b1 & "." & tb.b2 & "." & tb.b3
End Function

Private Function inet_addr_(ByVal cp As String) As Long
    Dim svData()    As String
    Dim i           As Long
    svData = Split(cp, ".")
    inet_addr_ = "&h" & Padd2(svData(3)) & Padd2(svData(2)) & Padd2(svData(1)) & Padd2(svData(0))
End Function

Private Function htons_(ByVal hostshort As Long) As Integer
    Dim tb As tByteWord
    Dim tl As tLong
    tl.lLong = hostshort
    LSet tb = tl
    htons_ = "&h" & Padd2(tb.b0) & Padd2(tb.b1)
End Function

Private Function Padd2(bData As Variant) As String
    Padd2 = Right$("0" & Hex(bData), 2)
End Function

[BlackZeroX]

@Cobein: Son de agradecer O.O!¡.

Ese htons_ si es pequeño!¡.

Dulces Lunas!¡.

[Karcrack]

Interesante funcion LSet... aun asi trabajar con bits es mas rapido

Buen trabajo Cobein