Freeswitch: mod_xml_curl and call groups - freeswitch

Question

I am currently switching from static configs to using mod_xml_curl and have encountered a problem with setting up call groups.
Inside my dialplan (served dynamically, working as expected) I am bridging to a group:
<action application="bridge" data="${group_call(call-group#domain-a.com)}"/>
Freeswitch is making a request with section=directory&action=group_call to the web server, to which I respond with a chunk of the directory containing the group and all relevant users:
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<document type="freeswitch/xml">
<section name="directory">
<domain name="domain-a.com">
<params>
<param name="dial-string" value="{presence_id=${dialed_user}#${dialed_domain}}${sofia_contact(${dialed_user}#${dialed_domain})}" />
</params>
<variables>
<variable name="user_context" value="domain-a.com" />
</variables>
<group name="call-group">
<users>
<user id="john" number-alias="1000">
<params>
<param name="password" value="1234" />
<param name="vm-password" value="1000" />
</params>
<variables>
<variable name="toll_allow" value="domestic,international,local" />
<variable name="accountcode" value="1000" />
<variable name="outbound_caller_id_name" value="John at domain-a.com" />
<variable name="outbound_caller_id_number" value="1234567" />
</variables>
</user>
<user id="lucy" number-alias="1001">
<params>
<param name="password" value="1234" />
<param name="vm-password" value="1000" />
</params>
<variables>
<variable name="toll_allow" value="domestic,international,local" />
<variable name="accountcode" value="1001" />
<variable name="outbound_caller_id_name" value="Lucy" />
<variable name="outbound_caller_id_number" value="12345678" />
</variables>
</user>
</users>
</group>
</domain>
</section>
</document>
However, group_call() seems to fail and in the logs I get ``:
2016-02-24 10:42:14.249534 [DEBUG] mod_dptools.c:1498 SET sofia/internal/michael#domain-a.com [call_timeout]=[15]
2016-02-24 10:42:14.529107 [CONSOLE] mod_xml_curl.c:323 XML response is in /tmp/2f772a8a-4c3a-46f2-834f-b9ba2c735feb.tmp.xml
EXECUTE sofia/internal/michael#domain-a.com bridge(error/NO_ROUTE_DESTINATION)
Perhaps anyone has experience setting up group calls with mod_xml_curl and could explain what exactly Freeswitch is expecting in the response?

Answer 1

After a little gnashing of teeth, I got this working. The clue was here underneath the group_call description:
Please note: If you need to have outgoing user variables set in leg B,
make sure you don't have dial-string and group-dial-string in your
domain or dialed group variables list; instead set dial-string or
group-dial-string in the default group of the user. This way
group_call will return user/101 and user/ would set all your user
variables to the leg B channel.
So, when you receive an action of type group_call, move the dial-string param to the group level, so instead of
<domain name="domain-a.com">
<params>
<param name="dial-string" value="{presence_id=${dialed_user}#${dialed_domain}}${sofia_contact(${dialed_user}#${dialed_domain})}" />
</params>
<variables>
<variable name="user_context" value="domain-a.com" />
</variables>
<group name="call-group">
<users>
<user id="john" number-alias="1000">
...
send this
<domain name="domain-a.com">
<variables>
<variable name="user_context" value="domain-a.com" />
</variables>
<group name="call-group">
<params>
<param name="dial-string" value="{presence_id=${dialed_user}#${dialed_domain}}${sofia_contact(${dialed_user}#${dialed_domain})}" />
</params>
<users>
<user id="john" number-alias="1000">
...
After I made that change, everything was hunky dory. Cheers!

Answer 2

It's related to your dialplan.It's not generated perfectly. just check the domain-a.com context in the dialplan.