Re: socket debug
Re: socket debug
- Subject: Re: socket debug
- From: Michael Marti <email@hidden>
- Date: Fri, 06 Dec 2002 16:23:40 +0000
Thank you very very much Quinn
I just tried trpt and I get:
trpt: /mach: no namelist
I believe this means that I have to recompile the kernel (sight). Well I
have to do so anyway in order to use ktrace. I just don't know, how to get
the source of the kernel (the tag given by uname -a does not exist on the
cvs server) and I don't know what config to change in order to use trpt.
To my socket problem:
I'm using a normal tcp socket to connect to a remote host. The connection
works fine, just sometimes it takes about one minute to establish. If I look
at the packages with tcpdump, I can see that the client tries to connect:
(see below the connection requests)
This makes me think that the problem is with the server. On the other hand
it is possible to connect to the server, during the time another connection
is blocked and sends the packages below. This even works from the same host
(epp02). Now I don't know if it's the server or the client.
Oh and after about one or two minutes the hanging connection sometimes
establishes and everything is OK (except for the 2 minute delay).
Any idea where the problem is?
------------------------------------------------------------------
15:53:56.381263 epp02.epp.ist.utl.pt.1023 > agamemnon.epp.ist.utl.pt.15001:
S 1879446430:1879446430(0) win 32768 <mss 1460,nop,wscale
0,nop,nop,timestamp 2612369 0> (DF)
15:53:59.174780 epp02.epp.ist.utl.pt.1023 > agamemnon.epp.ist.utl.pt.15001:
S 1879446430:1879446430(0) win 32768 <mss 1460,nop,wscale
0,nop,nop,timestamp 2612374 0> (DF)
15:54:02.175034 epp02.epp.ist.utl.pt.1023 > agamemnon.epp.ist.utl.pt.15001:
S 1879446430:1879446430(0) win 32768 <mss 1460,nop,wscale
0,nop,nop,timestamp 2612380 0> (DF)
--
----------------------------------------------------------------------------
Michael Marti
Centro de Fisica dos Plasmas
Instituto Superior Tecnico
1049-001 Lisboa
Tel. +351 21 841 93 79
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