[Vadim Smirnov]

good!hope the next version~can u give a release time?

It is expected in next couple of weeks.

byt the way. i did not send out a packet by winpkfilter. 3.0.4 need more Characteristic property for firewall secion.

I’m not sure I understand this statement. Could you clarify?

[Vadim Smirnov]

Does winpkt implement SPI and DPI in any way ?

Stateful Packet Inspection? WinpkFilter is a library which takes packet from kernel level and delivers to user mode where you can implement SPI, DPI or whatever you want. It does not implement packet inspection itself.

[Vadim Smirnov]

how to constructre a RST packet can u give me a delphi example?
why it is will be failed for my operation?please give me a slight.~~ Smile

I’m sorry, but I’m not a Delphi expert. Though the easiest would be sending your RST packet to the network (in addition to sending to stack) and intercept it with Network Monitor or any other sniffer you prefer. This will help to discover any probelms you may have in forming the packet.

can we make up a hardware filterinfo in the ring0. to complete the drop packet by the ring0 driver not need event. i think this is a necessary for most pelple.it can be improve the performance of winpkfilter.

This is already implemented in WinpkFilter 3.0.4 and currently under testing.

[Vadim Smirnov]

Some years ago I’ve been involved into pop-up windows blocker development (module to prevent undesired browser windows to be opened). In case of Internet Explorer the most usable approach is creating Browser Helper Object http://en.wikipedia.org/wiki/Browser_Helper_Object

According MSDN:

IWebBrowser2 Interface
Exposes methods that are implemented by the WebBrowser control (Microsoft ActiveX control) or implemented by an instance of the InternetExplorer application (OLE Automation).

So unless application uses ActiveX, you just get the instance of IE started, which loads BHO, which may prevent the page from being opened…

[Vadim Smirnov]

need to be chechsum or is it will be do the checksum by the SendPacketToMstcp or SendPacketToAdapter?

The sample above does not initialize IP header and above, it forms and sends a sample Ethernet frame filled with zeros. If you are creating real world IP/TCP/UDP packet then you have to properly initialize required headers and calculate checksums.

by the way,if i want to close the connection,need i send send a rst packet to both MSTCP and Adapter?

Depends from your task, in general it is enough to send RST packet to local stack, another peer will close connection by timeout. But of course you can send RST packets to both, local and remote peers.

[Vadim Smirnov]

I’m glad tat the issue is resolved.

i checked the signdrv.bat file to see the script. there are no options for “save” and “restore”. But my question is how they are successfully executed during installation of winpkfilter?

The reason is that there are two versions of signdrv.bat with different syntax. Latest one has simplified syntax of disable/enable. Thats why you got that error message.

[Vadim Smirnov]

please send the install script.

E-mailed to the address specified in the forum details.

Just for sure, are you playing with standard or custom build? Here can be the difference, since custom build has different device name.

[Vadim Smirnov]

the winpkfilter installation on vista (x86) is installed smoothly and I am able to run test applications successfully.

So installer was able to install WinpkFilter driver successfully, but you can’t install files taken from “winpkfilter frameworkkerneldriver” on ANOTHER Vista x86 system?

This is very confusing… I can send you installation script to refer, but it does not do anything special beyond mentioned commands.

[Vadim Smirnov]

If you mean NDIS hooking variant of WinpkFilter then it MUST be loaded after NDIS.SYS and before TCPIP.SYS to work normally, otherwise it not able to intercept TCP/IP protcol registration.

If you are about NDIS IM variant, then it can be added/removed dynamically in most cases, but SCM API is not suitable to this. I would recommend having a look at SNETCFG sample from DDK.

[Vadim Smirnov]

I’m wondering if it has the ability to send raw packet???

Sure it can.

int main(int argc, char* argv[])

{

UINT				counter = 0;

ether_header*		pEthHeader = NULL;



if (argc < 3)

{

printf ("Command line syntax:ntsender.exe index numntindex - network interface index.ntnum - number or packets to sendntYou can use ListAdapters to determine correct index.n");

return 0;

}



iIndex = atoi(argv[1]) - 1;

counter = atoi(argv[2]);



if(!api.IsDriverLoaded())

{

printf ("Driver not installed on this system of failed to load.n");

return 0;

}



api.GetTcpipBoundAdaptersInfo ( &AdList );



if ( iIndex + 1 > AdList.m_nAdapterCount )

{

printf("There is no network interface with such index on this system.n");

return 0;

}



// Initialize Request

ZeroMemory ( &Request, sizeof(ETH_REQUEST) );

ZeroMemory ( &PacketBuffer, sizeof(INTERMEDIATE_BUFFER) );

Request.EthPacket.Buffer = &PacketBuffer;

Request.hAdapterHandle = (HANDLE)AdList.m_nAdapterHandle[iIndex];



pEthHeader = (ether_header*)PacketBuffer.m_IBuffer;



memcpy(&pEthHeader->h_source, AdList.m_czCurrentAddress[iIndex], ETH_ALEN);

memset(&pEthHeader->h_dest, 0xFF, ETH_ALEN);

pEthHeader->h_proto = ETH_P_IP;

Request.EthPacket.Buffer->m_Length = MAX_ETHER_FRAME;



while (counter--)

api.SendPacketToAdapter(&Request);



return 0;

}

The code above initializes Ethernet header (broadcast IP packet) and sends it over the network. IP header and above are not initialized (packet is filled by zeros).

[Vadim Smirnov]

I think you could test with large ICMP PING packets. PING utility from Windows allows sending PING packet of large length (up to maximum IP packet size) which is fragmented by TCP/IP.

[Vadim Smirnov]

1) Are you trying to install on Vista x86 or x64?
2) Have you taken the correct drivers, INF files and snetcfg matching the OS (32 bit driver for x86, 64 bit for x64)? May be the problem in snetcfg tool if you have taken the original version from DDK instead the modified one we use.
3) Commands mentioned should be executed under Administrator account. You have mentioned that you tried, but I would recommend to recheck.
4) And the last, if you run WinpkFilter run-time installation does it install normally?

[Vadim Smirnov]

I did some searching around on the net and read that intermediate filter drivers like winpkfilter can break things like wake-on-lan.

Can you give some links on what you have found? Basically IM driver can break wake-on-lan if you want to do so, but WinpkFilter does not try to do it on purpose 8)

Also, is there any WinpkFilter application running when you go into standby? If there is then breaking wake-on-lan is possible because no packets can be processed by application which does not get any processor time.

[Vadim Smirnov]

I don’t think that there is a documented API/interface to do what you want, but probably you should be able to change the behaviour and view of visual elements (windows) by subclassing them with SetWindowsHookEx.

[Vadim Smirnov]

Тестовую версию LNM 2.2.3 можно посмотреть по ссылкам ниже (монитор и АПИ):

http://www.ntkernel.com/temp/NtTdiApiRt.zip
http://www.ntkernel.com/temp/LocalNetMonTrial.zip

Что нового:
1. Поддержка Висты.
Драйвера подписаны тестовым сертификатом, поэтому инсталлер монитора говорит, что поддержка Vista x64 экспериментальная и требует отключения проверки подписи. На специальной страничке предлагается сделать это автоматически.
2. Исправлен баг при обработки send’а (не send datagram,а имена send) для протокола UDP, который приводил к неправильному определению remote address’а.

Версия предварительная.

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