CODEWITHSUNDEEP
windowscommunicationwinsockhttp.sys
Dmitry Janushkevich
Dmitry Janushkevich

Reputation: 211

http.sys implementation

We all know that there's a big sweet piece o' binary named http.sys kernel-mode driver in our Windows that does HTTP handling for us. That is basically all we know about it.

But today I thought: hey, all our networking stuff like TCP/IP and whatnot is here, in userland -- ws2_32.dll's providers (in mswsock.dll) and all its friends. Since there are userland components, there is no way http.sys uses them. The question is: how do they do it? Any informative links will be greatly appreciated.

Upvotes: 3

Views: 3316

Answers (3)

Bukes
Bukes

Reputation: 3718

I would imagine that HTTP.SYS utilizes Windows Kernel Sockets to achieve it's objectives. See here as well.

Upvotes: 2

Dmitry Janushkevich
Dmitry Janushkevich

Reputation: 211

Found a good answer to the question here: http://www.codemachine.com/article_tdi.html

It appears that there is much, much more to networking in Windows than Winsock shows us.

Upvotes: 1

mvp
mvp

Reputation: 116327

http.sys is only meant to be used as server component listening for HTTP/HTTPS requests - basically IIS depends on it to achieve good performance. It is not used to make any client requests using Winsock library. You can read more here.

Upvotes: 1

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