Make captagent filter on headers

[lcx]

Sorry to open a github issue, not really sure where else to go with this.

I'm trying to figure out how header_regexp_match and header_check work.
My plan is to have a captagent running on a freeswitch but depending on the sip headers to send it to a different homer.
I have two profiles in my transport_hep.xml and if I want to do that based on the IP it works as expected:

                if (msg_check("any_ip", "127.0.0.1")) {
                    if(!send_hep("homer2")) {
                        clog("ERROR", "Error sending HEP!!!!");
                    }
                }

The IP is of course not 127.0.0.1 but this will send the traffic coming from the configured IP to the specified homer.
So far so good.

Now let's say I have this invite:

Max-Forwards: 70
User-Agent: snomD785/10.1.84.12
Contact: <sip:666@192.168.250.108:49431;transport=Tcp;line=dw1ctvar>;reg-id=1
X-Serialnumber: 000413924E28
Accept: application/sdp
Allow: INVITE, ACK, CANCEL, BYE, REFER, OPTIONS, NOTIFY, SUBSCRIBE, PRACK, MESSAGE, INFO, UPDATE

and I would want to make it match with the header X-Serialnumber: 000413924E28 how would I do that?

Also while writing this I realized that would lose me a lot of packages because the responses don't have that header, as a learning opportunity I would still be very curious. Read the C code, read the PDF's from workshops I found and couldn't figure it out.

Would there be a better way to accomplish this madness I am trying? As soon as an Invite has a specific value in a header that it marks any packages + responses to be sent to a specific homer?
Captagent would be the preferred option since I have some asterisk in the whole thing and not only freeswitch.

[lmangani]

You could try using customHeader for this purpose but in homer there's no transaction tracking (unlike hepic) so you would have to choose a method with 100% consistency uniquely based on the header contents to get requests and responses, etc.

[lcx]

I meanwhile know that I can't use this for what I intended but still am curious how to use it. So far I tried this without success:

                if (header_check("custom","Serialnumber")) {
                    clog("ERROR", "Bingo! Got a header!");
                }
                if (header_check("custom","X-Serialnumber")) {
                    clog("ERROR", "Bingo! Got a header!");
                }
                if (header_check("User-Agent","snomD785/10.1.84.12")) {
                    clog("ERROR", "Bingo! Got a UserAgent!");
                }
                if (header_regexp_match("body",".+erialnumber.*")) {
                    clog("ERROR", "Bingo! Got a header!");
                }
                if (header_regexp_match("body","000413924E28")) {
                    clog("ERROR", "Bingo! Got a header!");
                }
                if (header_regexp_match("custom","000413924E28")) {
                    clog("ERROR", "Bingo! Got a header!");
                }

Should I have use customHeader instead of custom?
like this:

                if (header_check("customHeader","X-Serialnumber")) {
                    clog("ERROR", "Bingo! Got a header!");
                }