[Sipp-users] regexp understanding assistance

[Paul M. <idk...@si...>]

Hi All.
Firstly I am not good at regex, so I have been reading tutorials and
looking at this site (http://regex101.com/) to practise my matching
techniques.

using the following example Via headers I want to match the port number
when it is available.

e.g.
TEST1: Via: SIP/2.0/UDP 192.168.0.65;rport;branch=z9hG4bK380
TEST2: Via: SIP/2.0/UDP 192.168.0.65:5060;rport;branch=z9hG4bK380
TEST3: Via: SIP/2.0/UDP 192.168.0.65:15080;rport;branch=z9hG4bK380

(don't get tied up on the rport syntax)

I expect that the matches for each of the three Test samples should be as
follow

TEST1='' (no match)
TEST2='5060'
TEST3='15080'

Using the following regex in the website I get my desired outcome:

.*:([0-9]{4,5})[:;]

I am sure that this will not be the best way but certainly it works in the
website just fine.

however when I use it an SIPp xml file I never get the same match as the
website suggest

example for input sample TEST2
the match is SIPp is
SIP/2.0/UDP 192.168.0.65:5060;

I am using this in the SIPp xml file

  <recv request="REGISTER" crlf="true">
    <action>
<ereg regexp=".*:([0-9]{4,5})[:;]" search_in="hdr" header="Via:"
assign_to="vPort" />
    </action>
  </recv>

I would like to have a reliable way to develop and test the regex in a
interactive tool such as the website I am using that returns the same
results when I use the epression in SIPp, can someone guide me to what I
need to do to accomplish this goal.

Also fro the case of TEST1 where there is no match I would like that vPort
be assigned a default value of 5060, if there is a way to achieve this
outcome that would be great to know also.

Thanks

Paul