From 32d74fff6214e277321b7200515c4de87daea947 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Karel=20Kozl=C3=ADk?= <kozlik@kufr.cz>
Date: Tue, 29 Nov 2022 15:54:35 +0100
Subject: [PATCH 1/2] Allow to not send `Expires` header in REGISTER request

---
 lib/Config.js      | 2 +-
 lib/Registrator.js | 4 ++--
 2 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/lib/Config.js b/lib/Config.js
index 67ae638a8..dafb3a5d9 100644
--- a/lib/Config.js
+++ b/lib/Config.js
@@ -275,7 +275,7 @@ const checks = {
       {
         const value = Number(register_expires);
 
-        if (value > 0)
+        if (value >= 0)
         {
           return value;
         }
diff --git a/lib/Registrator.js b/lib/Registrator.js
index 2c889741e..304231483 100644
--- a/lib/Registrator.js
+++ b/lib/Registrator.js
@@ -49,7 +49,7 @@ module.exports = class Registrator
 
     // Contents of the sip.instance Contact header parameter.
     this._sipInstance = `"<urn:uuid:${this._ua.configuration.instance_id}>"`;
-    
+
     this._contact += `;reg-id=${this._reg_id}`;
     this._contact += `;+sip.instance=${this._sipInstance}`;
   }
@@ -107,7 +107,7 @@ module.exports = class Registrator
 
     extraHeaders.push(`Contact: \
 ${this._contact};expires=${this._expires}${this._extraContactParams}`);
-    extraHeaders.push(`Expires: ${this._expires}`);
+    if (this._expires) extraHeaders.push(`Expires: ${this._expires}`);
 
     const request = new SIPMessage.OutgoingRequest(
       JsSIP_C.REGISTER, this._registrar, this._ua, {

From 76422bc25cad8fc2b91df12eec367494fb2eb4ab Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Karel=20Kozl=C3=ADk?= <kozlik@kufr.cz>
Date: Wed, 30 Nov 2022 09:44:14 +0100
Subject: [PATCH 2/2] Remove expires also from contact

---
 lib/Registrator.js | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/lib/Registrator.js b/lib/Registrator.js
index 304231483..564969142 100644
--- a/lib/Registrator.js
+++ b/lib/Registrator.js
@@ -104,9 +104,10 @@ module.exports = class Registrator
     }
 
     const extraHeaders = this._extraHeaders.slice();
+    let contactValue = `${this._contact}${this._extraContactParams}`;
 
-    extraHeaders.push(`Contact: \
-${this._contact};expires=${this._expires}${this._extraContactParams}`);
+    if (this._expires) contactValue = `${this._contact};expires=${this._expires}${this._extraContactParams}`;
+    extraHeaders.push(`Contact: ${contactValue}`);
     if (this._expires) extraHeaders.push(`Expires: ${this._expires}`);
 
     const request = new SIPMessage.OutgoingRequest(