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pysipp is for people who hate SIPp

but (want to) use it for automated testing because it gets the job done...

What is it?

Python configuring and launching the infamous SIPp using an api inspired by requests

It definitely lets you

  • Launch multi-UA scenarios (aka SIPp subprocesses) sanely
    • avoids nightmarish shell command concoctions from multiple terminals
    • allows for complex functional or end-to-end SIP testing
  • Reuse your existing SIPp XML scripts
  • Integrate nicely with pytest

It doesn't try to

  • Auto-generate SIPp XML scripts like sippy_cup
    • pysipp in no way tries to work around the problem of SIPp's awful XML control language; your current scenario scripts are compatible!

Basic Usage

Launching the default UAC scenario is a short line:

import pysipp
pysipp.client(destaddr=('', 5060))()

Manually running the default uac --calls--> uas scenario is also simple:

uas = pysipp.server(srcaddr=('', 5060))
uac = pysipp.client(destaddr=uas.srcaddr)
# run server async
uas(block=False)  # returns a `pysipp.launch.PopenRunner` instance by default
uac()  # run client synchronously


When using the [authentication] sipp keyword in scenarios, providing the credentials can be done with the auth_username and auth_password arguments, for example:

pysipp.client(auth_username='sipp', auth_password='sipp-pass')

Multiple Agents

For multi-UA orchestrations we can use a pysipp.scenario. The scenario from above is the default agent configuration:

scen = pysipp.scenario()
scen()  # run uac and uas synchronously to completion

Say you have a couple SIPp xml scrips and a device you're looking to test using them (eg. a B2BUA or SIP proxy). Assuming you've organized the scripts nicely in a directory like so:


If you've configured your DUT to listen for for SIP on and route traffic to the destination specified in the SIP Request-URI header and your local ip address is

scen = pysipp.scenario(dirpath='path/to/test_scenario/',
                       proxyaddr=('', 5060))

# run all agents in sequence starting with servers

pysipp by default uses -screen_file SIPp argument to redirect output, but this argument is only available in SIPp version >= 3.5.0, for lower versions to run properly, this argument must be disable setting enable_screen_file to False:

scen = pysipp.scenario(enable_screen_file=False)

If you've got multiple such scenario directories you can iterate over them:

for path, scen in pysipp.walk('path/to/scendirs/root/'):
    print("Running scenario collected from {}".format(path))

Async Scenario Launching

You can also launch multiple multi-UA scenarios concurrently using non-blocking mode:

scens = []
for path, scen in pysipp.walk('path/to/scendirs/root/', proxyaddr=('', 5060)):
    print("Running scenario collected from {}".format(path))

# All scenarios should now be running concurrently so we can continue
# program execution...
print("Continuing program execution...")

# Wait to collect all the results
print("Finalizing all scenarios and collecting results")
for scen in scens:

scen.finalize() actually calls a special cleanup function defined in the pysipp_run_protocol hook which invokes the internal reporting functions and returns a dict of cmd -> process items.


To see the mapping of SIPp command line args to pysipp.agent.UserAgent attributes, take a look at pysipp.command.sipp_spec. This should give you an idea of what can be set on each agent.


  • (a)synchronous multi-scenario invocation
  • fully plugin-able thanks to pluggy
  • detailed console reporting

... more to come!


SIPp duh...Get the latest version on github


from git

pip install git+git://github.com/SIPp/pysipp.git

Hopes and dreams

I'd love to see pysipp become a standard end-to-end unit testing tool for SIPp itself (particularly if paired with pytest).

Other thoughts are that someone might one day write actual Python bindings to the internals of SIPp such that a pure Python DSL can be used instead of the silly default xml SIP-flow mini-language. If/when that happens, pysipp can serve as a front end interface.

Advanced Usage

pysipp comes packed with some nifty features for customizing SIPp default command configuration and launching as well as detailed console reporting. There is even support for remote execution of SIPp over the network using rpyc

Enable detailed console reporting


Applying default settings

For now see #4

More to come?

  • document attributes / flags
  • writing plugins
  • using a pysipp_conf.py
  • remote execution
  • async mult-scenario load testing

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