[Click] Unable to understand output of Click

[Harald Schioeberg]

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John Adams wrote:
> Hi,
> 
> I was looking at the output of Click using tcpdump and a seeing something
> that I cannot understand (I am using a sender to send a file of 1 MB to a
> receiver):

Can you say what exactly you are doing? e.g. post the click config. What
exactly are you using to generate TCP segments in click ?

Almost none of your seq-nr. seem to make sense to me.


	Harald

ps: is the file actually transfered? or are you just trying ?


> 
> 22:01:13.442111 IP 10.0.0.1.12345 > 10.0.0.2.54321: S 1234:1234(0) win 65535
> 22:01:13.471705 IP 10.0.0.2.54321 > 10.0.0.1.12345: S 4321:4321(0) ack 1235
> win 65535
> 22:01:13.497422 IP 10.0.0.1.12345 > 10.0.0.2.54321: . 1235:2682(1447) win
> 65535
> 22:01:14.573322 IP 10.0.0.2.54321 > 10.0.0.1.12345: . ack 5981 win 65535
> 
> I'm just wondering where the ack for 5981 came from. I mean, in Line 3, the
> sender sent from 1235 to 2682 so the ack should've been for 2683 but instead
> it is for 5981. Can someone explain what I could be missing here?
> 
> Thanks,
> John
> _______________________________________________
> click mailing list
> click at amsterdam.lcs.mit.edu
> https://amsterdam.lcs.mit.edu/mailman/listinfo/click
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