From 23f3b44b8b6e8c43924ef20d4e4b92b434928a2f Mon Sep 17 00:00:00 2001
From: Dave Horton <daveh@beachdognet.com>
Date: Wed, 30 Nov 2022 12:50:54 -0500
Subject: [PATCH] add custom header on Refer indicating whether sbc-inbound
 should fix up the Refer-To

---
 lib/tasks/sip_refer.js | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/lib/tasks/sip_refer.js b/lib/tasks/sip_refer.js
index c36ad700..f4d41f0e 100644
--- a/lib/tasks/sip_refer.js
+++ b/lib/tasks/sip_refer.js
@@ -36,6 +36,7 @@ class TaskSipRefer extends Task {
         method: 'REFER',
         headers: {
           ...this.headers,
+          ...(this.referToIsUri && {'X-Refer-To-Leave-Untouched': true}),
           'Refer-To': referTo,
           'Referred-By': referredBy
         }
@@ -100,6 +101,7 @@ class TaskSipRefer extends Task {
       /* they may have only provided a phone number/user */
       referTo = `sip:${referTo}@${host}`;
     }
+    else this.referToIsUri = true;
     if (!referredBy) {
       /* default */
       referredBy = cs.req?.callingNumber || dlg.local.uri;