Peer to Peer Network

Hi everyone,
I am currently working in a peer to peer network.
You got any guides or tutorials I can read ? ...

Thanks so much!

1. Beej's Guide to Network Programming
2. Any open source P2P client.

Hi Salem,
I've read Beej's guide and it has nothing about P2P :/

Relatively to open source P2P clients I couldn't find any client that would match my work profile.

Thanks so much.

Once you've got past Beej, and can send/receive a message, the rest of it is all about
Communications protocol - Wikipedia, the free encyclopedia
Which is all about you send me "this", and I send you "that", in such a way as to construct a meaningful conversation (say sending a file).

All of the internet protocols are governed by RFC's
Request for Comments - Wikipedia, the free encyclopedia
RFC-Editor Webpage

Some of the more popular P2P may have an RFC (I haven't looked). In any event, any of the open source projects should have some documentation on the protocol which would be worth reading.