[HECnet] TCP/IP experts?

[Johnny Billquist]

On 2013-02-17 01:28, Clem Cole wrote:
Linux ip/tcp stack is not the bbn/bsd derived code.   it was independently developed so the fact that they are differences is not surprising.       one of my own personal gripes about Linux is the desire/need to redo things from scratch (ext fs comes to find here also).

I seem to remember that they have in fact had several implementations, as their first attempts really sucked (Linux people take some pride in the many iterations they do of implementations, it would seem).

I would not be surprised to learn that after a few failed attempts, they "borrows" parts of the BSD code for their TCP/IP, but I have not looked properly at it in quite a number of years.

	Johnny


On Feb 16, 2013, at 4:41 PM, Gregg Levine <gregg.drwho8 at gmail.com> wrote:

On Sat, Feb 16, 2013 at 4:33 PM, Johnny Billquist <bqt at softjar.se> wrote:
On 2013-02-16 01:13, Johnny Billquist wrote:

Hi. As I'm working on my TCP/IP for RSX, I just noticed something that I
think looks funny in Linux. But right now my head is also spinning, so
maybe there is something I've just forgotten, or don't know, which
explains this. But if anyone can shed some light, I'd be interested.

Just for the record - I *think* that TCP/IP in Linux is misbehaving, but
it's not really hurting anything, but I like my TCP/IP to really do
things as right and optimal as possible.


[...]


Any thoughts, opinions or knowledge always welcome.


Not that I've come any closer to figuring it all out, however I thought I
should mention that I've checked some more against both NetBSD and OS/X and
neither show the behavior I observe in Linux, so I think I'm just going to
attribute this to a crappy implementation on the Linux side. That's not the
first time Linux code turns out to be bad, so I'm not totally surprised...

(And yes, I also tried VMS actually... :-) )


              Johnny

--
Johnny Billquist                                   || "I'm on a bus
                                                                  ||   on a psychedelic trip
email: bqt at softjar.se                         ||   Reading murder books
pdp is alive!                                         ||   tryin' to stay hip" - B. Idol

Hello!
Johnny I've been arguing with the stack for Linux for about as many
years as I've known about the idea of emulating our friends, the
PDP-11 crowd and those Vaxes. And sadly it happens to be something of
a kludge. Alan Cox and the others behind it are constantly sorting it
out. Fact is, three-quarters of it, happens to be from the land of BSD
and fitted into it rather awkwardly.

So your discoveries must be a surprise to a lot of us, but it confirms
what I've known all along.

Incidentally Dave this isn't your fault.
-----
Gregg C Levine gregg.drwho8 at gmail.com
"This signature fought the Time Wars, time and again."


-- 
Johnny Billquist                                   || "I'm on a bus
                                                                  ||   on a psychedelic trip
email: bqt at softjar.se                         ||   Reading murder books
pdp is alive!                                         ||   tryin' to stay hip" - B. Idol