SABER SE MAQUINA ESTA CONECTADA A REDE

USUARIO.EXCLUIDOS 28/05/2004 16:35:35
#27244 Resposta escolhida

Minha sugestão é de um ping no servidor através da rotina abaixo:

Attribute VB_Name = "modPing"
Option Explicit

Private Declare Function GetHostByName Lib "wsock32.dll" Alias "gethostbyname" (ByVal HostName As String) As Long
Private Declare Function WSAStartup Lib "wsock32.dll" (ByVal wVersionRequired&, lpWSAdata As WSAdata) As Long
Private Declare Function WSACleanup Lib "wsock32.dll" () As Long
Private Declare Sub CopyMemory Lib "kernel32" Alias "RtlMoveMemory" (hpvDest As Any, hpvSource As Any, ByVal cbCopy As Long)
Private Declare Function IcmpCreateFile Lib "icmp.dll" () As Long
Private Declare Function IcmpCloseHandle Lib "icmp.dll" (ByVal HANDLE As Long) As Boolean
Private Declare Function IcmpSendEcho Lib "ICMP" (ByVal IcmpHandle As Long, ByVal DestAddress As Long, ByVal RequestData As String, ByVal RequestSize As Integer, RequestOptns As IP_OPTION_INFORMATION, ReplyBuffer As IP_ECHO_REPLY, ByVal ReplySize As Long, ByVal TimeOut As Long) As Boolean

Private Const SOCKET_ERROR = 0

Private Type WSAdata
wVersion As Integer
wHighVersion As Integer
szDescription(0 To 255) As Byte
szSystemStatus(0 To 128) As Byte
iMaxSockets As Integer
iMaxUdpDg As Integer
lpVendorInfo As Long
End Type

Private Type Hostent
h_name As Long
h_aliases As Long
h_addrtype As Integer
h_length As Integer
h_addr_list As Long
End Type

Private Type IP_OPTION_INFORMATION
TTL As Byte
Tos As Byte
Flags As Byte
OptionsSize As Long
OptionsData As String * 128
End Type

Private Type IP_ECHO_REPLY
Address(0 To 3) As Byte
Status As Long
RoundTripTime As Long
DataSize As Integer
Reserved As Integer
data As Long
Options As IP_OPTION_INFORMATION
End Type

Public Function FunG_Ping(ByVal strIP As String, _
Optional ByVal blnMsg As Boolean = False) As Boolean

Dim hFile As Long, lpWSAdata As WSAdata
Dim hHostent As Hostent, AddrList As Long
Dim Address As Long, rIP As String
Dim OptInfo As IP_OPTION_INFORMATION
Dim EchoReply As IP_ECHO_REPLY
Dim HostName As String

FunG_Ping = False

HostName = strIP

Call WSAStartup(&H101, lpWSAdata)

If GetHostByName(HostName + String(64 - Len(HostName), 0)) <> SOCKET_ERROR Then
CopyMemory hHostent.h_name, ByVal GetHostByName(HostName + String(64 - Len(HostName), 0)), Len(hHostent)
CopyMemory AddrList, ByVal hHostent.h_addr_list, 4
CopyMemory Address, ByVal AddrList, 4
End If

hFile = IcmpCreateFile()

If hFile = 0 Then
MsgBox "Não foi possível criar o arquivo ICMP !", _
vbOKOnly + vbCritical, "Ping..."
Exit Function
End If

OptInfo.TTL = 255

If IcmpSendEcho(hFile, Address, String(32, "A"), 32, OptInfo, EchoReply, Len(EchoReply) + 8, 2000) Then
rIP = CStr(EchoReply.Address(0)) + "." + CStr(EchoReply.Address(1)) + "." + CStr(EchoReply.Address(2)) + "." + CStr(EchoReply.Address(3))
Else
MsgBox "Timeout", vbOKOnly + vbCritical, "Ping..."
End If

If EchoReply.Status = 0 Then
FunG_Ping = True
MsgBox "A Resposta de " + HostName + " (" + rIP + ") foi recebida após " + Trim$(CStr(EchoReply.RoundTripTime)) + "ms"
Else
MsgBox "Falhou ...", vbOKOnly + vbCritical, "Ping..."
End If

Call IcmpCloseHandle(hFile)
Call WSACleanup

End Function

Utilize a função Fung_ping, passando como parà¢metro o IP do servidor.
Se true, bingo tudo OK.
Espero ter ajudado.

Fish.............

USUARIO.EXCLUIDOS 28/05/2004 16:43:47
#27250

Veja, utilize a função que eu e passei.Seu programa na máquina 192.168.0.3. Você utiliza a função passando como parà¢metro 192,168.0.5. Se conseguir pingar significa que ela esta ativa na red

Fish.........