5 ms·

I have actually implemented a TCP stack in python, unfortunately I can't share it publicly just yet. The authors problems are because she is not using RAW_IP_S

by kashif 12y ago

I have actually implemented a TCP stack in python, unfortunately I can't share it publicly just yet. The authors problems are because she is not using RAW_IP_SOCKETS. Making TCP packets using pythons struct module is a breeze. I can post specific examples in code if anyone is interested. Finally you can write a proper TCP stack in python, there is no reason not to. Your user-space interpreted stack won't be as fast as a compiled kernel-space one - but it won't be feature short. PS: I guess, Google is probably sending him a SSL/TLS handshake which he isn't handling. Edit: Corrected author's gender as mentioned by kind poster.

blutoot 12y ago
I believe the author is a "she". It says at the banner of the blog.
- blutoot 12y ago
  I think this downvoting thing is out of control. What was even remotely offensive about this correction?
  - dragonwriter 12y ago
    "offensive" isn't the only reason for downvoting. "Not a substantive addition to the conversation" is one (of many) other bases. If you are going to complain about downvoting [1] why do so based on the unwarranted assumption that the downmod must be for offensiveness? [1] And you shouldn't, see the Guidelines [2] under "In Comments" [2] https://news.ycombinator.com/newsguidelines.html https://news.ycombinator.com/newsguidelines.html
    - vacri 12y ago
      In my opinion, if HN doesn't want puzzled people to ask why they've been downmodded, then instead of putting a line in the Guidelines saying "don't do this", they should separate the downmod into "I disagree" and "flag this as a bad comment", with the latter item the one that reduces the text weight. It's clearly broken - people have been doing this for as long as I've been here, and it's not going to change (sadly, 'it' means both the behaviour, and HN's braindead downmod mechanism).
kashif 12y ago
Google sends extra packets because it does not comply with TCP Slow Start(RFC 2581) - if the author implements a proper tcp state machine and buffer then she would be able to handle this.
fivre 12y ago
If you have code examples already, I'd be grateful--I ran into server that had Python but not nmap or nc and while I was already familiar enough with socket to do what I needed, I wasn't so familiar with struct and wasn't able to make much headway manually building TCP/UDP packets before having to move onto other work.
- kashif 12y ago
  drop me an email, the address is in my profile. I will send you some examples.

by kashif 12y ago

blutoot 12y ago

I believe the author is a "she". It says at the banner of the blog.

blutoot 12y ago
I think this downvoting thing is out of control. What was even remotely offensive about this correction?
- dragonwriter 12y ago
  "offensive" isn't the only reason for downvoting. "Not a substantive addition to the conversation" is one (of many) other bases. If you are going to complain about downvoting [1] why do so based on the unwarranted assumption that the downmod must be for offensiveness? [1] And you shouldn't, see the Guidelines [2] under "In Comments" [2] https://news.ycombinator.com/newsguidelines.html https://news.ycombinator.com/newsguidelines.html
  - vacri 12y ago
    In my opinion, if HN doesn't want puzzled people to ask why they've been downmodded, then instead of putting a line in the Guidelines saying "don't do this", they should separate the downmod into "I disagree" and "flag this as a bad comment", with the latter item the one that reduces the text weight. It's clearly broken - people have been doing this for as long as I've been here, and it's not going to change (sadly, 'it' means both the behaviour, and HN's braindead downmod mechanism).

kashif 12y ago

Google sends extra packets because it does not comply with TCP Slow Start(RFC 2581) - if the author implements a proper tcp state machine and buffer then she would be able to handle this.

fivre 12y ago

If you have code examples already, I'd be grateful--I ran into server that had Python but not nmap or nc and while I was already familiar enough with socket to do what I needed, I wasn't so familiar with struct and wasn't able to make much headway manually building TCP/UDP packets before having to move onto other work.

kashif 12y ago
drop me an email, the address is in my profile. I will send you some examples.