[Vadim Smirnov]

I have tested the driver with several 10 Gbps network adapters and have not observed any noticeable performance degradation. One example is the Broadcom P210tep NetXtreme-E dual-port 10GBASE-T PCIe adapter.

However, 10 Gbps networking is still relatively niche, and hardware and driver implementations can vary significantly. To provide a universal packet-processing interface, Windows Packet Filter disables NIC task offloading features; jumbo frames are just the most commonly discussed example. This may affect different network adapters and their drivers in different ways.

The drop from 10 Gbps to 1.7 Gbps is unusually large, so the issue may be specific to the Marvell AQtion AQC113 driver or its interaction with other network filters installed on the system.

[Vadim Smirnov]

Please check the topic below:

Speed issue

[Vadim Smirnov]

This is probably related to Jumbo Frames. Some hardware can reach 10 Gbps only when Jumbo Frames are enabled, while the standard Windows Packet Filter driver build limits the maximum Ethernet frame size to 1514 bytes:

#ifdef JUMBO_FRAME_SUPPORTED
#define MAX_ETHER_FRAME 9014
#else
#define MAX_ETHER_FRAME 1514
#endif

So, even if no sample application is running, installing the standard driver may affect throughput on such hardware.

To enable Jumbo Frame support, the driver has to be rebuilt with JUMBO_FRAME_SUPPORTED defined.

[Vadim Smirnov]

If AutoHotkey lets you run a command-line action when the app is closed, you can use the CLI utility to disconnect the tunnel.

[Vadim Smirnov]

This is expected behavior.

The VPN  connection is managed by a background service that does not depend on the UI. On normal exit, the UI sends a disconnect command to the service before closing.

If the UI process is force-killed, for example via AutoHotKey or Task Manager, it cannot send that command, so the service keeps running and the VPN tunnel stays connected.

So disconnect on exit works for normal exits, but not when the UI is forcibly terminated.

[Vadim Smirnov]

Have you enabled Disconnect VPN when app closes option? What options do you have enabled under Startup & Auto-Connect?

[Vadim Smirnov]

Could you please clarify what version of WSC do you use?

[Vadim Smirnov]

Примера нет, но WireSock работает схожим образом. Для Wireguard тоннеля он не прогоняет UDP пакеты через TCP/IP stack, а отправляет их напрямую в сеть и так же забирает из сети. Это дает чувствительный выигрыш в скорости.

[Vadim Smirnov]

WinpkFilter использует похожий NDIS-фильтр-драйвер, что и Wireshark. Поэтому если Wireshark видит трафик с потерями, то WinpkFilter будет видеть его точно так же.

Можно попробовать альтернативный вариант: отправлять пакеты напрямую из WinpkFilter, в обход сетевого стека, и таким же образом принимать их.

[Vadim Smirnov]

Even though the major version (3) matches, the jump in the minor version (from 3.2/3.4 to 3.6) usually means changes in the driver interface. So 3.2.x or 3.4.x libraries aren’t guaranteed to work with a 3.6.x sys file. It’s best to keep both at the same major.minor version (e.g. 3.6.x with 3.6.x) to avoid compatibility issues.

[Vadim Smirnov]

Dear Roshan,

Thank you for your interest — I’m glad to hear you’re ready to proceed with the purchase.
To answer your questions:

• Yes, you will receive the full source code and the static .lib file immediately after payment. The delivery is handled manually but typically within a few hours at most.
• Yes, redistribution of the SDK inside your own EXE is legally allowed under the Source Code license.
• As mentioned, the delivery process is manual, but prompt — you’ll receive everything by email shortly after your purchase is confirmed.
• At the moment, we do not offer Telegram or WhatsApp support channels, but I provide direct email support and am usually very responsive.

For ongoing development support, we can also arrange alternative contact methods if needed.

[Vadim Smirnov]

All information about the Windows Packet Filter source code license is available at:

👉 https://www.ntkernel.com/windows-packet-filter/licensing/

This page provides details on licensing options, pricing, and what’s included with the source code package.

[Vadim Smirnov]

Thank you for your interest in the Windows Packet Filter. The driver’s source code is available for purchase for those who need to extend or customize its functionality in kernel mode.

[Vadim Smirnov]

Hi,

Thanks for your interest in the NDISAPI project — I’m glad to hear you’re experimenting with it in Delphi.

The Delphi interface unit is actually named winpkf.pas, and it’s available in the repository here:

https://github.com/wiresock/ndisapi/blob/master/examples/legacy/Delphi/winpkf.pas

It looks like this file was last updated around version 3.4 of the driver, so depending on what features you’re planning to use, it might require some updates to match the current API.

If you do end up updating or improving the unit, feel free to submit a pull request — contributions are always welcome!

[Vadim Smirnov]

Спасибо, что проверили. Жаль, что воспроизведение пропало. Возможно, это связано с незаметным обновлением драйверов. Проблема была не в карте Realtek — «затёртый» OID, на котором происходил сбой, шёл через сетевой интерфейс, эмулированный поверх Bluetooth. Однако отключение карты всё же могло повлиять на воспроизведение, поскольку, по всей видимости, имело место состояние гонки (race condition).

[Author]

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