From a620cb19e9610a125c14a3cde94800e56a36b44d Mon Sep 17 00:00:00 2001
From: Stephen Paul Weber <singpolyma@singpolyma.net>
Date: Tue, 22 Feb 2022 11:03:16 -0500
Subject: [PATCH] PSTN gateways contacts can do voice calls

If we are in a fallback situation (no presence) then always allow AUDIO if
domain matches a known PSTN gateway.
---
 .../eu/siacs/conversations/xmpp/jingle/RtpCapability.java  | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/src/main/java/eu/siacs/conversations/xmpp/jingle/RtpCapability.java b/src/main/java/eu/siacs/conversations/xmpp/jingle/RtpCapability.java
index 8a7581f044194f5a305e21e3a7db62c87755da7b..e3deaba5b4a4cc3e7088f23b6f59b578e50031f0 100644
--- a/src/main/java/eu/siacs/conversations/xmpp/jingle/RtpCapability.java
+++ b/src/main/java/eu/siacs/conversations/xmpp/jingle/RtpCapability.java
@@ -13,6 +13,7 @@ import eu.siacs.conversations.entities.Presence;
 import eu.siacs.conversations.entities.Presences;
 import eu.siacs.conversations.entities.ServiceDiscoveryResult;
 import eu.siacs.conversations.xml.Namespace;
+import eu.siacs.conversations.xmpp.Jid;
 
 public class RtpCapability {
 
@@ -62,7 +63,13 @@ public class RtpCapability {
 
     public static Capability check(final Contact contact, final boolean allowFallback) {
         final Presences presences = contact.getPresences();
+
         if (presences.size() == 0 && allowFallback && contact.getAccount().isEnabled()) {
+            Contact gateway = contact.getAccount().getRoster().getContact(Jid.of(contact.getJid().getDomain()));
+            if (gateway.showInRoster() && gateway.getPresences().anyIdentity("gateway", "pstn")) {
+                return Capability.AUDIO;
+            }
+
             return contact.getRtpCapability();
         }
         Capability result = Capability.NONE;