Day 22: Got some TCP packets back!
source link: https://jvns.ca/blog/2013/11/06/day-22-got-some-tcp-packets-back/
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Day 22: Got some TCP packets back!
I spent a bunch of time with Jessica trying to send TCP packets to get the http://example.com homepage.
It turned out that the problem we were having was not at the TCP level, but actually at HTTP level: we needed to send something like
example.com\r\nAccept: */*\r\n\r\n"
to make the server actually reply. I then successfully reassembled a bunch of TCP packets into a webpage! I still need to
- reply saying I got the packets (to the FIN-ACK, I think)
- Make sure I don’t use duplicate packets when I reassemble
- probably lots of things.
Today wasn’t super productive, I think because I gave a talk at NYC Python and I was a bit worried about it. The talk went well, though! So tomorrow I will hopefully get more done. We will see!
I really want to start writing “real” code again soon. Maybe tomorrow. This exploratory networking stuff is super fun and I’m learning a lot, but I feel like I haven’t written much code in a while and it is bothering me. Maybe a bittorrent client will come soon =)
BUT WHICH LANGUAGE. Clojure? Hmm.
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