CODEWITHSUNDEEP
csocketsunixsocks
user5423
user5423

Reputation: 145

Sending requests using Sockets through a SOCKS5 Proxy Server in C

I have a simple networking program for sending and responding to HTTP requests/responses. However, if I wanted to send a HTTP or another request via a SOCKS5 proxy, how would I go about this? I'm using C Unix sockets.

I could solve this by creating a proxy server in Linux. However, my intention is so that I can send this to a proxy server I do not own so that it can be forwarded to the destination server. I couldn't seem to find a library. I found an RFC for it which I've read https://www.rfc-editor.org/rfc/rfc1928.txt , but i'm still not 100% unsure how to format my request.

Am I supposed to send the segments for the handshakes as hex? If so, would I send a string of hex 0F3504 or \x0F \x35 \x04 or 0x0F3504? Another question is do i need to denote that header = value in the message, or does the SOCKS5 server know what header i am referring to by the position of the byte it is looking at from the message I've sent?

Any clear up would be very much appreciated

Upvotes: 1

Views: 2086

Answers (1)

Brecht Sanders
Brecht Sanders

Reputation: 7305

Some time ago I wrote an open source C library that may help you: https://github.com/brechtsanders/proxysocket

Maybe you can use the library. Its quite easy, just replace the connect() with stuff from the library and for the rest you can keep the rest of your code that uses the socket that is returned.

Or you can take a peek in the code to see how it's done there.

Upvotes: 1

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