funkey

Another TCP server (written with my socket_UDF)

10 posts in this topic

Hello, I just made another TCP server. I will use the server for data collection and a lot of clients can get the data from TCP. I now use it for UDP broadcast some devices to get their IP's. You can also use it for chat's.

It is very low level, but so you have more options than with the pure AutoIt functions.

Just start the server in SciTE to see the console outputs. Then you can start up to 63 clients to talk to the server.

I hope you like it.

Server script:

#include "socket_UDF.au3"
;funkey 2013.06.21

_WSAStartup()

Global $iSocket
Global $iReturn
Global $iPort = 20500
Global $sIP_Connected
Global $iPort_Connected
Global $tBuffer = DllStructCreate("char buffer[512]")


$iSocket = _socket($AF_INET, $SOCK_STREAM, $IPPROTO_TCP)
ConsoleWrite("Listen Socket: " & $iSocket & @CRLF)

Global $tReUse = DllStructCreate("BOOLEAN reuse")
DllStructSetData($tReUse, "reuse", True) ; enable reusing the same port
$iReturn = _setsockopt($iSocket, $SOL_SOCKET, $SO_REUSEADDR, $tReUse) ; set reusing option for the port
If $iReturn Then
ConsoleWrite("SetSockOpt error setting reusing the same port!. Windows Sockets Error Codes: " & _WSAGetLastError() & @CRLF)
EndIf

$iReturn = _bind($iSocket, @IPAddress1, $iPort) ;local IP-Address and port to use
If $iReturn Then
ConsoleWrite("Bind error: " & $iReturn & @CRLF) ; 0 is OK
EndIf

$iReturn = _listen($iSocket, 1)
If $iReturn Then
ConsoleWrite("Listen error: " & $iReturn & @CRLF) ; 0 is OK
EndIf

Global $iNewSocket
Global $tReadFds = DllStructCreate($tagFd_set)
Global $tReadFds_Copy = DllStructCreate($tagFd_set)
_FD_ZERO($tReadFds)
_FD_SET($iSocket, $tReadFds)
Global $iSocketMax = $iSocket
Global $iSocketNow
Global $sDataRcv

While 1

DllCall('ntdll.dll', 'none', 'RtlMoveMemory', 'struct*', $tReadFds_Copy, 'struct*', $tReadFds, 'ULONG_PTR', DllStructGetSize($tReadFds))

$iReturn = _select($iSocketMax + 1, $tReadFds_Copy, 2000) ;timeout 2 seconds
If _FD_ISSET($iSocket, $tReadFds_Copy) Then
$iNewSocket = _accept($iSocket, $sIP_Connected, $iPort_Connected)
_FD_SET($iNewSocket, $tReadFds)
_FD_SHOW($tReadFds)
If $iNewSocket > $iSocketMax Then $iSocketMax = $iNewSocket
ConsoleWrite("New connected socket: " & $iNewSocket & @TAB & "IP: " & $sIP_Connected & @TAB & "Port: " & $iPort_Connected & @LF)
EndIf

For $i = 2 To DllStructGetData($tReadFds, "fd_count")
$iSocketNow = DllStructGetData($tReadFds, "fd_array", $i)
If _FD_ISSET($iSocketNow, $tReadFds_Copy) Then
DllCall('ntdll.dll', 'none', 'RtlZeroMemory', 'struct*', $tBuffer, 'ULONG_PTR', DllStructGetSize($tBuffer))
If _recv($iSocketNow, $tBuffer) = $SOCKET_ERROR Then
_closesocket($iSocketNow)
_FD_CLR($iSocketNow, $tReadFds)
Else
$sDataRcv = DllStructGetData($tBuffer, 1)
ConsoleWrite("Data received: " & $sDataRcv & @LF)
If $sDataRcv == "CloseServer!" Then
ExitLoop 2
EndIf
EndIf
EndIf
Next

WEnd

For $i = 1 To DllStructGetData($tReadFds, "fd_count")
_closesocket(DllStructGetData($tReadFds, "fd_array", $i))
Next

_WSACleanup()


Func _FD_SHOW(ByRef $tFd_set)
For $i = 1 To DllStructGetData($tFd_set, "fd_count")
ConsoleWrite($i & ":" & @TAB & DllStructGetData($tFd_set, "fd_array", $i) & @LF)
Next
EndFunc ;==>_FD_SHOW

socket_UDF and example.rar

3 people like this

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build bigger and better idiot-proof programs, and the Universe
trying to produce bigger and better idiots.
So far, the Universe is winning.

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Thanks very much   :ILA2:

Useful UDF!

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Interesting thank you for sharing  :)

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Hi funkey

nice,

thanks for sharing

....  I now use it for UDP broadcast some devices to get their IP's. ....

 

could you please post an example to achieve this?

thanks


small minds discuss people average minds discuss events great minds discuss ideas.... and use AutoIt....

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Hi funkey

 

nice,

thanks for sharing

 

 

could you please post an example to achieve this?

 

thanks

This depends on devices you have and is different for every kind.

I have scripts to list all 'Siemens Sentron devices' and another one to list all 'Moxa Serial Device Servers' in our network.


Programming today is a race between software engineers striving to
build bigger and better idiot-proof programs, and the Universe
trying to produce bigger and better idiots.
So far, the Universe is winning.

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so, there are specific broadcast for different devices?
isn't it there a general purpose broadcast?
I do not knows how that works.


small minds discuss people average minds discuss events great minds discuss ideas.... and use AutoIt....

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For example I send a few characters via UDP broadcast on a specified port (that's why I build that UDF - AutoIt does not support this, or this is buggy) to my network. Only devices that wait for information on that port and that know the characters send the requested information back.

But what information do you want to get from what devices?


Programming today is a race between software engineers striving to
build bigger and better idiot-proof programs, and the Universe
trying to produce bigger and better idiots.
So far, the Universe is winning.

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#8 ·  Posted (edited)

I do not know if it's possible, but i wonder if an unknown device that responds to a ping, can be asked to respond what type of device is himself, for example if it's a router or a network printer or something else?
or maybe is possible the opposite of this?.So that I can broadcast for specific devices types (network printers for example?) and get response from (all) that type of devices only?

Edited by PincoPanco

small minds discuss people average minds discuss events great minds discuss ideas.... and use AutoIt....

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If think, that is not possible for all devices, but for some devices you could get the MAC address from IP address and then look what company made the device (for example use http://wintelguy.com/index.pl to find this out). Here is a script to receive the MAC address via ARP request:

#include "socket_UDF.au3"

_WSAStartup()

Global $MAC = _SendARP(@IPAddress1)
ConsoleWrite("Local MAC address: " & $MAC & @LF)
Global $MAC = _SendARP("192.168.3.4")
ConsoleWrite("Remote MAC address: " & $MAC & @LF)

_WSACleanup()

Func _SendARP($DestIP)
Local $DestAddress = _inet_addr($DestIP)
Local $tMacAddr = DllStructCreate("BYTE[8]")
Local $aRet = DllCall("Iphlpapi.dll", "DWORD", "SendARP", "ULONG", $DestAddress, "ULONG", 0, "struct*", $tMacAddr, "ULONG*", 8)
Local $sMAC = ""
Switch $aRet[0]
Case 0
For $i = 1 To $aRet[4] - 1
$sMAC &= Hex(DllStructGetData($tMacAddr, 1, $i), 2) & "-"
Next
$sMAC &= Hex(DllStructGetData($tMacAddr, 1, $i), 2)
Return $sMAC
Case 31
Return "ERROR_GEN_FAILURE"
Case 87
Return "ERROR_INVALID_PARAMETER"
Case 1784
Return "ERROR_INVALID_USER_BUFFER"
Case 67
Return "ERROR_BAD_NET_NAME"
Case 1168
Return "ERROR_NOT_FOUND"
EndSwitch
EndFunc
1 person likes this

Programming today is a race between software engineers striving to
build bigger and better idiot-proof programs, and the Universe
trying to produce bigger and better idiots.
So far, the Universe is winning.

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Ok, Thank You.


small minds discuss people average minds discuss events great minds discuss ideas.... and use AutoIt....

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