Greetings,
I'm working on my application that sends emails anonymously. I encountered a problem... I can't seem to implement support for socks proxies.
After hours of googling I found out that I should work with the WinInet API (wininet.dll)... I found some code that changes the following fields:
Good. I need to modify only the socks field, but after a lot of hours trying I couldn't find a way to modify the code to change only the socks field...
Here is the source code:
Trust me, I searched and tried a lot of things, but I couldn't get it, that's why I'm asking you guys.
Thanks!
I'm working on my application that sends emails anonymously. I encountered a problem... I can't seem to implement support for socks proxies.
After hours of googling I found out that I should work with the WinInet API (wininet.dll)... I found some code that changes the following fields:
Good. I need to modify only the socks field, but after a lot of hours trying I couldn't find a way to modify the code to change only the socks field...
Here is the source code:
VB.NET:
[COLOR=#333333]Imports System[/COLOR]
Imports System.Runtime.InteropServices
Public Class IEProxy
Public Enum Options
INTERNET_PER_CONN_FLAGS = 1
INTERNET_PER_CONN_PROXY_SERVER = 2
INTERNET_PER_CONN_PROXY_BYPASS = 3
INTERNET_PER_CONN_AUTOCONFIG_URL = 4
INTERNET_PER_CONN_AUTODISCOVERY_FLAGS = 5
INTERNET_OPTION_REFRESH = 37
INTERNET_OPTION_PER_CONNECTION_OPTION = 75
INTERNET_OPTION_SETTINGS_CHANGED = 39
PROXY_TYPE_PROXY = &H2
PROXY_TYPE_DIRECT = &H1
End Enum
End Class
<StructLayout(LayoutKind.Sequential)> _
Private Class FILETIME
Public dwLowDateTime As Integer
Public dwHighDateTime As Integer
End Class
<StructLayout(LayoutKind.Explicit, Size:=12)> _
Private Structure INTERNET_PER_CONN_OPTION
<FieldOffset(0)> Dim dwOption As Integer
<FieldOffset(4)> Dim dwValue As Integer
<FieldOffset(4)> Dim pszValue As IntPtr
<FieldOffset(4)> Dim ftValue As IntPtr
Public Function GetBytes() As Byte()
Dim b(12) As Byte
BitConverter.GetBytes(dwOption).CopyTo(b, 0)
Select Case dwOption
Case (Options.INTERNET_PER_CONN_FLAGS)
BitConverter.GetBytes(dwValue).CopyTo(b, 4)
Case (Options.INTERNET_PER_CONN_PROXY_BYPASS)
BitConverter.GetBytes(pszValue.ToInt32()).CopyTo(b, 4)
Case (Options.INTERNET_PER_CONN_PROXY_SERVER)
BitConverter.GetBytes(pszValue.ToInt32()).CopyTo(b, 4)
End Select
Return (b)
End Function
End Structure
<StructLayout(LayoutKind.Sequential, CharSet:=CharSet.Auto)> _
Private Class INTERNET_PER_CONN_OPTION_LIST
Public dwSize As Integer
Public pszConnection As String
Public dwOptionCount As Integer
Public dwOptionError As Integer
Public pOptions As IntPtr
End Class
<StructLayout(LayoutKind.Sequential)> _
Private Class INTERNET_PROXY_INFO
Public dwAccessType As Integer
Public lpszProxy As IntPtr
Public lpszProxyBypass As IntPtr
End Class
Private Const ERROR_INSUFFICIENT_BUFFER = 122
Private Const INTERNET_OPTION_PROXY = 38
Private Const INTERNET_OPEN_TYPE_DIRECT = 1
<DllImport("wininet.dll")> _
Private Shared Function InternetSetOption(ByVal hInternet As IntPtr, _
ByVal dwOption As Integer, _
ByVal lpBuffer As INTERNET_PER_CONN_OPTION_LIST, _
ByVal dwBufferLength As Integer) As Boolean
End Function
<DllImport("kernel32.dll")> _
Private Shared Function GetLastError() As Integer
End Function
Public Function SetProxy(ByVal proxy_full_addr As String) As Boolean
Dim bReturn As Boolean
Dim list As New INTERNET_PER_CONN_OPTION_LIST
Dim dwBufSize As Integer = Marshal.SizeOf(list)
Dim opts(3) As INTERNET_PER_CONN_OPTION
Dim opt_size As Integer = Marshal.SizeOf(opts(0))
list.dwSize = dwBufSize
list.pszConnection = ControlChars.NullChar
list.dwOptionCount = 3
'set flags
opts(0).dwOption = Options.INTERNET_PER_CONN_FLAGS
opts(0).dwValue = Options.PROXY_TYPE_DIRECT Or Options.PROXY_TYPE_PROXY
'set proxyname
opts(1).dwOption = Options.INTERNET_PER_CONN_PROXY_SERVER
opts(1).pszValue = Marshal.StringToHGlobalAnsi(proxy_full_addr)
'set override
opts(2).dwOption = Options.INTERNET_PER_CONN_PROXY_BYPASS
opts(2).pszValue = Marshal.StringToHGlobalAnsi("local")
Dim b(3 * opt_size) As Byte
opts(0).GetBytes().CopyTo(b, 0)
opts(1).GetBytes().CopyTo(b, opt_size)
opts(2).GetBytes().CopyTo(b, 2 * opt_size)
Dim ptr As IntPtr = Marshal.AllocCoTaskMem(3 * opt_size)
Marshal.Copy(b, 0, ptr, 3 * opt_size)
list.pOptions = ptr
'Set the options on the connection
bReturn = InternetSetOption(IntPtr.Zero, Options.INTERNET_OPTION_PER_CONNECTION_OPTION, list, dwBufSize)
If Not bReturn Then
Debug.WriteLine(GetLastError)
End If
'Notify existing Internet Explorer instances that the settings have changed
bReturn = InternetSetOption(IntPtr.Zero, Options.INTERNET_OPTION_SETTINGS_CHANGED, Nothing, 0)
If Not bReturn Then
Debug.WriteLine(GetLastError)
End If
'Flush the current IE proxy setting
bReturn = InternetSetOption(IntPtr.Zero, Options.INTERNET_OPTION_REFRESH, Nothing, 0)
If Not bReturn Then
Debug.WriteLine(GetLastError)
End If
Marshal.FreeHGlobal(opts(1).pszValue)
Marshal.FreeHGlobal(opts(2).pszValue)
Marshal.FreeCoTaskMem(ptr)
Return (bReturn)
End Function
Public Function DisableProxy() As Boolean
Dim bReturn As Boolean
Dim list As New INTERNET_PER_CONN_OPTION_LIST
Dim dwBufSize As Integer = Marshal.SizeOf(list)
Dim opts(0) As INTERNET_PER_CONN_OPTION
Dim opt_size As Integer = Marshal.SizeOf(opts(0))
list.dwSize = dwBufSize
list.pszConnection = ControlChars.NullChar
list.dwOptionCount = 1
opts(0).dwOption = Options.INTERNET_PER_CONN_FLAGS
opts(0).dwValue = Options.PROXY_TYPE_DIRECT
Dim b(opt_size) As Byte
opts(0).GetBytes().CopyTo(b, 0)
Dim ptr As IntPtr = Marshal.AllocCoTaskMem(opt_size)
Marshal.Copy(b, 0, ptr, opt_size)
list.pOptions = ptr
'Set the options on the connection
bReturn = InternetSetOption(IntPtr.Zero, Options.INTERNET_OPTION_PER_CONNECTION_OPTION, list, dwBufSize)
If Not bReturn Then
Debug.WriteLine(GetLastError)
End If
'Notify existing Internet Explorer instances that the settings have changed
bReturn = InternetSetOption(IntPtr.Zero, Options.INTERNET_OPTION_SETTINGS_CHANGED, Nothing, 0)
If Not bReturn Then
Debug.WriteLine(GetLastError)
End If
'Flush the current IE proxy setting
bReturn = InternetSetOption(IntPtr.Zero, Options.INTERNET_OPTION_REFRESH, Nothing, 0)
If Not bReturn Then
Debug.WriteLine(GetLastError)
End If
Marshal.FreeCoTaskMem(ptr)
Return (bReturn)
End Function
VB.NET:
[COLOR=#333333]sProxy.SetProxy("proxy:port") 'to start the thing[/COLOR]
VB.NET:
[COLOR=#333333] sProxy.DisableProxy() 'to stop the thing[/COLOR]Trust me, I searched and tried a lot of things, but I couldn't get it, that's why I'm asking you guys.
Thanks!
