### Description

It doesn't look like the "pua_dialoginfo" module has support for the "display" attribute in the identity tag. This tag is used by some phones to update the phone display with caller/callee information for the respective key. I'm wondering how difficult it would be to add this feature. Thanks in advance for anyone who reads this!

### Expected behavior

Kamailio includes display attribute in identity tags in generated publish messages.

<pre> &lt;dialog-info xmlns="urn:ietf:params:xml:ns:dialog-info" version="1" state="full"&gt; &lt;dialog id="as7d900as8" call-id="a84b4c76e66710" local-tag="1928301774" remote-tag="456887766" direction="initiator"&gt; &lt;state&gt;early&lt;/state&gt; &lt;local&gt; &lt;identity <b><i>display="Alice"</i></b>&gt;sip:alice@example.com&lt;/identity&gt; &lt;target uri="sip:alice@phone11.example.com"/&gt; &lt;/local&gt; &lt;remote&gt; &lt;identity <b><i>display="Bob"</i></b>&gt;sip:bob@example.org&lt;/identity&gt; &lt;target uri="sip:bobster@phone21.example.org"/&gt; &lt;/remote&gt; &lt;/dialog&gt; &lt;/dialog-info&gt; </pre>

#### Actual observed behavior

Kamailio generates a publish request for dialog events similar to the one below. The display attribute is not included in the "identity" tags. This means that when a notify message is sent to a watcher for this publish, the name is not rendered on the phone display.

<pre> &lt;dialog-info xmlns="urn:ietf:params:xml:ns:dialog-info" version="1" state="full"&gt; &lt;dialog id="as7d900as8" call-id="a84b4c76e66710" local-tag="1928301774" remote-tag="456887766" direction="initiator"&gt; &lt;state&gt;early&lt;/state&gt; &lt;local&gt; <b>&lt;identity&gt;sip:alice@example.com&lt;/identity&gt;</b> &lt;target uri="sip:alice@phone11.example.com"/&gt; &lt;/local&gt; &lt;remote&gt; <b>&lt;identity&gt;sip:bob@example.org&lt;/identity&gt;</b> &lt;target uri="sip:bobster@phone21.example.org"/&gt; &lt;/remote&gt; &lt;/dialog&gt; &lt;/dialog-info&gt; </pre>

### Possible Solutions

I added a small modification to the module as a POC and it works as expected. With the following modification, the phone display is updated with the string in the “display” attribute. I added line 191-193 below, between lines 190 & 191 on the current master branch. The example below shows the “remote” tag, I also did the same thing for the local tag a few more lines down.

<pre> 184 tag_node = xmlNewChild(remote_node, NULL, BAD_CAST "identity", 185 BAD_CAST buf) ; 186 if( tag_node ==NULL) 187 { 188 LM_ERR("while adding childn"); 189 goto error; 190 } 191 /* Testing - adding display attribute to the identity tag */ 192 xmlNewProp(tag_node, BAD_CAST "display", BAD_CAST "RemoteCallerName"); 193 /* */ 195 196 tag_node = xmlNewChild(remote_node, NULL, BAD_CAST "target", NULL); 197 if( tag_node ==NULL) </pre>

Here is a link to the file in the module I’m referring to: https://github.com/kamailio/kamailio/blob/master/src/modules/pua_dialoginfo/...

I don’t really have any professional experience writing C code, and I was unable to identify a way to grab this string from the “From” header. Unfortunately, because I would have really loved to give this feature back to the community!

### Additional Information

Thank you so much for this amazing software. I absolutely adore Kamailio! If someone is interested in this, please let me know if there is anything I can do to help.