I had a similar need sometime ago.... I wanted to inform the pcap in the
command line(with the parameter -key) so I tried exactly what you did and
faced the same problem....
>From what I can remember, after investigating the problem I found out that
the pcap file is read in the beginning of the script execution, while the
variable/keyword substitution or field injection only happen before sending
a message, that's why you got that error...
This seems a restriction of SIPp... it has to read the pcap file in the
beginning and only once to avoid delays in the middle of the test and the
variables are replaced just before sending the message to assure they have
the right value... seems logical to me. What it lacks is a way to make
replacements in the text of the script before script parsing or
execution..... this kind of feature would solve your problem....
Since we dont have this feature you can try something like this:
<nop>
<action>
<assignstr assign_to="dtmf" value="[field4]"/> *** Gets the value
from the injection file
<strcmp assign_to="dtmf_1" variable="dtmf" value="1"/> *** Check if
the value was 1, if so sets dtmf_1
<strcmp assign_to="dtmf_2" variable="dtmf" value="2"/> *** Check if
the value was 2, if so sets dtmf_2
.... *** repeat for every dtmf you have
</action>
</nop>
<nop condexec="dtmf_1"> *** plays the pcap only if the dtmf is 1
<action>
<exec play_pcap_audio="/usr/share/sipp/pcap/dtmf_2833_1.pcap"/>
</action>
</nop>
<nop condexec="dtmf_2"> *** plays the pcap only if the dtmf is 2
<action>
<exec play_pcap_audio="/usr/share/sipp/pcap/dtmf_2833_2.pcap"/>
</action>
</nop>
..... *** repeat for every dtmf you have
I haven't tested it, seems dumb and gets way too long but may work!
On Fri, Sep 16, 2011 at 11:08 AM, Ingemar Nilsson
<[email protected]>wrote:
> Hi,
>
> I'm trying to send DTMF digits using RTP according to a CSV injection
> file, but I don't understand how to get it right. First, I tried this:
>
> <nop>
> <action>
> <exec play_pcap_audio="/usr/share/sipp/pcap/dtmf_2833_[field4].pcap"/>
> </action>
> </nop>
>
> But SIPp claims it cannot find the file
> "/usr/share/sipp/pcap/dtmf_2833_[field4].pcap", because it did not
> expand [field4] from the injection file. I read some thread on
> sipp-users from 2007 that said that you should assign the value to a
> variable first, like this:
>
> <nop>
> <action>
> <assignstr assign_to="2" value="[field4]" />
> <exec play_pcap_audio="/usr/share/sipp/pcap/dtmf_2833_$2.pcap"/>
> </action>
> </nop>
>
> But that didn't work either, since $2 was not expanded to the value of
> [field4] in pcap_play_audio.
>
> Is there any way to do this? I have a working scenario that uses SIP
> INFO and reads DTMF digits from an injection file, and I also have a
> working scenario with a hard-coded pcap_play_audio sequence. But I would
> like the pcap_play_audio sequence to be determined by the injection
> file, just like in my SIP INFO scenario, and I cannot figure out how to
> do that.
>
> I'm using SIPp 3.1.9 (from the EPEL repo) on CentOS 5.
>
> Regards
> Ingemar
>
>
>
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