On Wed, Aug 10, 2011 at 11:24 AM, mayamatakeshi <mayamatake...@gmail.com>wrote:
> > On Tue, Aug 9, 2011 at 7:07 AM, Daniel Wong <dw...@netsapiens.com> wrote: > >> Hi all, >> I'm trying to simulate a traffic pattern whereby i have a stable call >> generation rate from the UAC to UAS, and hold the calls long enough to have >> a few thousand active calls. Then, i'd like to have the scenario suddenly >> send BYEs from the UAS side as fast as my machine would allow it - to >> terminate the calls that are still up, while at the same time still >> generating new traffic in the background. >> I have no problems creating the stable traffic generation scenario >> (relatively easy), but i don't know how to incorporate the sudden BYEs into >> the scenario as well. >> >> Ideas anyone? >> > > I did the following test and it worked: > > 1) got the epoch when I wanted the sudden BYE to happen. Ex: > > [root@mymachine tmp]# date +%s --date="Aug 10 10:58:00 2011" > 1312941480 > > 2) in the scenario file, got the current epoch, subtracted it from the > epoch for BYE and multiplied it with 1000 to get the pause value in > milliseconds, then I used that value in the pause command: > > <nop> > <action> > <assign assign_to="wake_up" value="1312941480"/> > <gettimeofday assign_to="seconds,microseconds"/> > <subtract assign_to="wake_up" variable="seconds"/> > <multiply assign_to="wake_up" value="1000"/> > </action> > </nop> > <Reference variables="microseconds"/> > > <pause variable="wake_up"/> > > <send BYE .... /> > > So if you need the sudden BYE to happen only once and continually generate > more calls, you could start one instance with the above scenario and another > with a fixed value for <pause/> (option -d). > If you want the sudden BYE to happen continuously, then it could be ran by > a looping bash script, recalculating the value of the wake_up (call sipp > with something like "-m 2000", for sipp to exit and have it restarted by the > controlling bash script). > After re-reading your email, I realized you want to do this having sipp working as UAS. So the above cannot be used as the bash script would start sipp in UAC mode. > > But If you need new sudden BYE calls to happen continually every 10 minutes > for example, and if you want this to be done by a single scenario without > stop, then I think you could change the code to calculate the next 10-minute > epoch dynamically. > So I think you must write the UAS scenario like the above but continually calculating the next epoch for new bunches of calls.
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