Use ASTF with retransmissions in PCAP

[Robert Blomberg]

Hi!

Is it possible to use any flag or something in v2.32 to execute pcaps that looks like this?

******

Exception stack (most recent call last):

#6     sim.py:202                                         - 'profile = cl.get_profile()'
#5     http_karl.py:18                                    - 'cps=2.776)])'
#4     trex_astf_client.py:1199                           - 'prog_c = ASTFProgram(file=cap_file, side="c")'
#3     trex_astf_client.py:190                            - 'cap.analyze()'
#2     cap_handling.py:242                                - 'self.obj.analyze()'
#1     cap_handling.py:203                                - '.format(pkt_num, tcp.seq, exp_s_seq))'
#0     cap_handling.py:40                                 - 'raise ASTFError('\nError for file %s: %s\n' % (self.file_name, msg))'

Summary error message:


Error for file /root/trex-core/scripts/procera/http_get_33M.pcap: TCP seq in packet 321 is 40126896. We expected 40121104. Please check that there are
                        no packet loss or retransmission in cap file

Thanks.

/Robert

[hanoh haim]

The script try to learn the L7 data and build emulation program. In this case there might be missing L7 data.

Try to fix the TCP layer and L7 using tools like tcperwrite or write a manual L7 emulation program.

You can use WireShark that can give you the L7 in case all the data is there.

I assume you don’t want to send a wrong/out-of-order L7 data right?

Thanks,

Hanoh

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Hanoh

Sent from my iPhone

[Robert Blomberg]

HI!

Saw that you could do some several approaches to fix that. Will go with editcap or wireedit.

I don't mind to send wrong/out-of-order L7 data, different use-cases and negative testcases is always intresting for the DUT.

Thanks for answer.

/Robert

[hanoh haim]

understood. 

in that case you can skip the python exception and let it go 

we will try to add a flag to skip this test 

Hanoh

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