20 Mar
2020
20 Mar
'20
7:01 a.m.
You're using set_contact_alias(), which already changes the Contact header.
Try msg_apply_changes() before your 2nd Contact header change.
On Thu, Mar 19, 2020 at 5:11 AM Sergey Safarov <s.safarov(a)gmail.com> wrote:
Looks as not expected here
sip:4.5.6.7:5060;alias=10.100.1.1~5060~1Content-Type: application/sdp
About contact header.
Yes it is really important header.
If your carrier want specific Contact header format, then I recommend try
use other provider.
Contact header used also for RURI headers. So you cannot simple change
Contact.
Kamailio is very good SP proxy. For you will more simple invite Kamailio
tech guy to configure inter-working with this specific carrier.
On Thu, Mar 19, 2020 at 4:43 AM Andrew White <andrew(a)uconnected.com.au>
wrote:
Hi all,
Hope everyone is well, and looking forward to seeing you all whenever
Kamailio World ends up being!
I’m currently dealing with an issue which I’m unsure if it’s due to my
own implementation, or a bug.
When attempting to manipulate the Contact header via app_ruby, the SIP
message I send ends up being malformed. Here’s the code I’m using:
def replace_contact_header(uri)
#KSR::HDR.remove("Contact") if KSR::HDR.is_present('Contact') > 0
#KSR::HDR.append("Contact: #{uri}\r\n")
KSR::HDR.rmappend("Contact", "Contact: #{uri}\r\n")
end
Note that I have tried both rmappend and the commented out functions too.
I call this with a custom built URI, such as <
61400123123(a)kamailio.test.uconnected.com.au>gt;. This function is called
just before a KSR::TM.t_relay(). Here’s the result I get watching from
tshark (some info scrubbed for privacy):
Record-Route: <
sip:1.2.3.4;lr;ftag=e3p42efd3635HH;vst=AAAAAAAAAAAAAAAAAAAAAAoUXVFHDQAAs83AEGwAAFgwCQA8QY3RlZC5jb20uYXU-;did=927.f0f2
…
Call-ID: 3de29646-e423-1238-e712-023563fb337c
CSeq: 17736747 INVITE
sip:4.5.6.7:5060;alias=10.100.1.1~5060~1Content-Type: application/sdp
Content-Length: 483
Contact: <sip:61400123123@kamailio.test.uconnected.com.au>
In this case, 4.5.6.7 is the PBX I made the call from (and the value of
the original Contact header), and 1.2.3.4 is what
kamailio.test.uconnected.com.au resolves to, and is this Kamailio
instance.
Here’s a copy of the same thing when I don’t call my
replace_contact_header function and t_relay:
Record-Route: <
sip:1.2.3.4;lr;ftag=j6jebCSa5Qap6c;vst=AAAAAAAAAAAAAAAAAAAAAAoUXVND38dTgwEGEAEGwAAFgwCQA8Fdn83lZC5jb20uYXU-;did=827.40b
...
Call-ID: 249571c5-e91a-ae91-6d8e-023563fb337c
CSeq: 17735867 INVITE
Contact: <sip:4.5.6.7:5060;alias=10.100.1.1~5060~1>
Content-Type: application/sdp
Content-Length: 483
Given the relative simplicity of the function, I have to assume this is
an error with how the function is manipulating the existing Contact header?
It seems that the “Contact: <“ part of the header is being removed as well
as the “>\r\n", but the rest being left.
I’m currently using commit 283e468401d809ca9b71368c32badf3a70d48b8b
<https://github.com/kamailio/kamailio/commit/283e46> on Amazon Linux 2,
which is CentOS/RHEL based.
Thanks!
Andrew
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