lwip-contrib | small independent implementation of the TCP/IP protocol | TCP library
kandi X-RAY | lwip-contrib Summary
kandi X-RAY | lwip-contrib Summary
lwIP is a small independent implementation of the TCP/IP protocol suite that has been initially developed by Adam Dunkels and is now continued here. The focus of the lwIP TCP/IP implementation is to reduce resource usage while still having a full scale TCP. This makes lwIP suitable for use in embedded systems with tens of kilobytes of free RAM and room for around 40 kilobytes of code ROM.
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QUESTION
I have a TCP/IP stack running within a Windows userspace program. The stack is based on a Windows-port of LwIP: https://github.com/yarrick/lwip-contrib/tree/master/ports/win32
The userspace stack interfaces with an ethernet interface at layer 2 using the npcap library/driver: https://nmap.org/npcap/
ncap is used to send and capture raw ethernet packets, which are passed from/to the userspace LwIP stack.
The problem: Let's say I listen on TCP port 5000 within the userspace stack. The Windows kernel does not know anything about the userspace stack and treats 5000 as closed port. This interferes with the userspace stack. For example, the kernel might response to incoming SYN packets with RESET packets (rejecting the TCP connection).
The question: How can I shut down the Windows kernel TCP/IP stack for a specified ethernet interface? I want the userspace stack via ncap to be the only one who is sending out packets.
...ANSWER
Answered 2018-Nov-05 at 09:28Unchecking all protocols in the network adapter settings solved the problem (ipv4, ipv6, others...)
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