From 75f0532193440294f4bbf7cd687174b5e9a16249 Mon Sep 17 00:00:00 2001
From: Bohdan Horbeshko <bodqhrohro@gmail.com>
Date: Sun, 19 Mar 2023 18:12:06 -0400
Subject: [PATCH] Warn about undelivered carbons to foreign servers

---
 telegabber.go    | 2 +-
 xmpp/handlers.go | 9 +++++++++
 2 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/telegabber.go b/telegabber.go
index 0554cb9..72353bb 100644
--- a/telegabber.go
+++ b/telegabber.go
@@ -15,7 +15,7 @@ import (
 	goxmpp "gosrc.io/xmpp"
 )
 
-var version string = "1.5.0-dev"
+var version string = "1.5.0"
 var commit string
 
 var sm *goxmpp.StreamManager
diff --git a/xmpp/handlers.go b/xmpp/handlers.go
index 2bdbaef..db2b6ea 100644
--- a/xmpp/handlers.go
+++ b/xmpp/handlers.go
@@ -168,6 +168,15 @@ func HandleMessage(s xmpp.Sender, p stanza.Packet) {
 
 	if msg.Type == "error" {
 		log.Errorf("MESSAGE ERROR: %#v", p)
+
+		if msg.XMLName.Space == "jabber:component:accept" && msg.Error.Code == 401 {
+			suffix := "@" + msg.From
+			for bare := range sessions {
+				if strings.HasSuffix(bare, suffix) {
+					gateway.SendServiceMessage(bare, "Your server \"" + msg.From + "\" does not allow to send carbons", component)
+				}
+			}
+		}
 	}
 }