Hello,
I'm handling a 300 Multiple Choices reply in an onreply_route as
described the Opensips Blog post "Handling SIP Redirect Requests in
realtime".
The problem I'm seeing is while iterating the contacts through the $ct
variable, only one of the two contact records in the SIP message is
returned. Instead it seemingly substitutes the initial contact for one
of the returned contacts. I think I should be getting all the contacts
in the message and not the initial contact as I read the documentation.
This system is running Opensips v3.2.6
Below is the SIP message (from sngrep), the onreply_route script, and
the log output.
2022/05/02 21:12:54.183024 23.101.143.54:5060 -> 192.46.219.150:5060
SIP/2.0 300 Multiple Choices
Via: SIP/2.0/UDP 192.46.219.150:5060;branch=z9hG4bKe01e.fcabc446.0;i=881249d1
Via: SIP/2.0/TCP
192.168.49.125:5080;received=67.172.178.64;branch=z9hG4bKBHcBe35Be3KjH
Max-Forwards: 69
From: 15074529949
<sip:[email protected]>;tag=jDtDtDmmXaXtQ
To: 12187299716 <sip:[email protected]:5060>;tag=6ayH1QZrymXSS
Call-ID: 79021022-44ff-123b-42ba-001fc69ce9dd
CSeq: 51209194 INVITE
Contact: "unknown" <sip:[email protected]>;q=0.129
Contact: "unknown" <sip:[email protected]>;q=0.128
User-Agent: FreeSWITCH-mod_sofia/1.10.5-release-17-25569c1631~64bit
Accept: application/sdp
Allow: INVITE, ACK, BYE, CANCEL, OPTIONS, MESSAGE, INFO, UPDATE, REGISTER,
REFER, NOTIFY
Supported: timer, path, replaces
Allow-Events: talk, hold, conference, refer
Reason: Q.850;cause=31;text="NORMAL_UNSPECIFIED"
Content-Length: 0
X-FS-Display-Name: 12187299716
X-FS-Display-Number: sip:[email protected]
Remote-Party-ID: "12187299716"
<sip:[email protected]>;party=calling;privacy=off;screen=no
onreply_route[RTPENGINE]{
xlog("OnReply RTPENGINE: Status = $rs");
if (t_check_status("300")){
$var(n) = 0;
xlog("OnReply RTPENGINE: contact $ct.fields(uri)");
xlog("OnReply RTPENGINE: last contact $(ct.fields(uri)[-1])");
xlog("OnReply RTPENGINE: first contact $(ct.fields(uri)[0])");
xlog("OnReply RTPENGINE: second contact $(ct.fields(uri)[1])");
xlog("OnReply RTPENGINE: third contact $(ct.fields(uri)[2])");
while ($(ct[$var(n)]) != NULL) {
xlog("OnReply RTPENGINE: var(n) = $var(n)");
if ($(ct.fields(uri)[$var(n)]) != NULL) {
xlog("OnReply RTPENGINE: appending branch = $(ct.fields(uri)[$var(n)]) :
var(n) = $var(n)");
append_branch($(ct.fields(uri)[$var(n)]));
}
$var(n) = $var(n) + 1;
}
t_inject_branches("msg");
}
if (has_body("application/sdp")){
# c flag handles duplicate c= lines in SDP
rtpengine_answer("c");
}
}
May 2 21:12:54 opensipsprod1 /usr/sbin/opensips[30007]: OnReply RTPENGINE:
Status = 300
May 2 21:12:54 opensipsprod1 /usr/sbin/opensips[30007]: DBG:tm:t_check_status:
checked status is <300>
May 2 21:12:54 opensipsprod1 /usr/sbin/opensips[30007]:
DBG:core:parse_headers: flags=ffffffffffffffff
May 2 21:12:54 opensipsprod1 /usr/sbin/opensips[30007]: OnReply RTPENGINE:
contact sip:[email protected]:5060
May 2 21:12:54 opensipsprod1 /usr/sbin/opensips[30007]:
DBG:core:parse_headers: flags=ffffffffffffffff
May 2 21:12:54 opensipsprod1 /usr/sbin/opensips[30007]: DBG:core:parse_params:
Parsing params for:[q=0.128]
May 2 21:12:54 opensipsprod1 /usr/sbin/opensips[30007]: OnReply RTPENGINE:
last contact sip:[email protected]
May 2 21:12:54 opensipsprod1 /usr/sbin/opensips[30007]:
DBG:core:parse_headers: flags=ffffffffffffffff
May 2 21:12:54 opensipsprod1 /usr/sbin/opensips[30007]: OnReply RTPENGINE:
first contact sip:[email protected]:5060
May 2 21:12:54 opensipsprod1 /usr/sbin/opensips[30007]:
DBG:core:parse_headers: flags=ffffffffffffffff
May 2 21:12:54 opensipsprod1 /usr/sbin/opensips[30007]: OnReply RTPENGINE:
second contact sip:[email protected]
May 2 21:12:54 opensipsprod1 /usr/sbin/opensips[30007]:
DBG:core:parse_headers: flags=ffffffffffffffff
May 2 21:12:54 opensipsprod1 /usr/sbin/opensips[30007]: OnReply RTPENGINE: third
contact <null>
May 2 21:12:54 opensipsprod1 /usr/sbin/opensips[30007]:
DBG:core:parse_headers: flags=ffffffffffffffff
May 2 21:12:54 opensipsprod1 /usr/sbin/opensips[30007]: OnReply RTPENGINE:
var(n) = 0
May 2 21:12:54 opensipsprod1 /usr/sbin/opensips[30007]:
DBG:core:parse_headers: flags=ffffffffffffffff
May 2 21:12:54 opensipsprod1 /usr/sbin/opensips[30007]:
DBG:core:parse_headers: flags=ffffffffffffffff
May 2 21:12:54 opensipsprod1 /usr/sbin/opensips[30007]: OnReply RTPENGINE:
appending branch = sip:[email protected]:5060 : va
r(n) = 0
May 2 21:12:54 opensipsprod1 /usr/sbin/opensips[30007]:
DBG:core:parse_headers: flags=ffffffffffffffff
May 2 21:12:54 opensipsprod1 /usr/sbin/opensips[30007]:
DBG:core:parse_headers: flags=ffffffffffffffff
May 2 21:12:54 opensipsprod1 /usr/sbin/opensips[30007]: OnReply RTPENGINE:
var(n) = 1
May 2 21:12:54 opensipsprod1 /usr/sbin/opensips[30007]:
DBG:core:parse_headers: flags=ffffffffffffffff
May 2 21:12:54 opensipsprod1 /usr/sbin/opensips[30007]:
DBG:core:parse_headers: flags=ffffffffffffffff
May 2 21:12:54 opensipsprod1 /usr/sbin/opensips[30007]: OnReply RTPENGINE:
appending branch = sip:[email protected] : var(n)
= 1
Thanks for your help
Dan Cooper
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