ASTF Profile: Run only once?

[c.ti...@gmail.com]

Hi,

I created a simple ASTF profile that sends a HTTP request from one IP and receives a HTTP reply from another IP.

Essentially:
------------------------------------

# Client Program.
prog_c = ASTFProgram()
prog_c.send(http_req)
prog_c.recv((len(http_res)))

# Server Program.
prog_s = ASTFProgram()
prog_s.recv((len(http_req)))
prog_s.send(http_res)

client_template = ASTFTCPClientTemplate(program=prog_c, ip_gen=ip_gen)
server_template = ASTFTCPServerTemplate(program=prog_s)
template = ASTFTemplate(client_template=client_template,
server_template=server_template)

return ASTFProfile(default_ip_gen=ip_gen, templates=template)

------------------------------------

If I run this profile with `sudo ./t-rex-64 -f /vagrant/astf/http.py -c 1 --ast`, it is sent over and over again (like a continuous stream in stateless mode).

I know that I can set the test duration to x seconds, but I wonder if it's possible to tell TRex to execute the profile exactly once?

What I need is not a continuous execution but a "burst" with one HTTP request and one HTTP reply (+ implicit TCP 3-way-handshake and termination).

(I am aware that I can get the PCAP of a single execution with astf-sim. This PCAP could then be replayed exactly once. However, this looks like a rather hacky solution and would be my last resort - especially because my profile will get more complex later ...)

[hanoh haim]

Yes, have a look into limit directive in the astf manual 

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Hanoh

Sent from my iPhone

[c.ti...@gmail.com]

Thank you very much, using the limit directive worked like a charm!

For anyone that might stumble upon this question in the future:
The solution was to add the limit directive to the ASTFTCPClientTemplate object:

client_template = ASTFTCPClientTemplate(program=prog_c, ip_gen=ip_gen, limit=1)

The API description can be found at:
https://trex-tgn.cisco.com/trex/doc/cp_astf_docs/api/profile_code.html?highlight=limit#astftcpclienttemplate-class