From c1bcd1edf710b4050a87904d0a471285b8547cba Mon Sep 17 00:00:00 2001
From: Sean DuBois <sean@siobud.com>
Date: Tue, 19 Mar 2024 22:50:31 -0400
Subject: [PATCH] Add the ability to disable Link-Local answer

pion/ice doesn't gather Link-Local addresses, these answers break
connectivity
---
 config.go | 3 +++
 conn.go   | 4 ++++
 2 files changed, 7 insertions(+)

diff --git a/config.go b/config.go
index 50a7a57..3e211db 100644
--- a/config.go
+++ b/config.go
@@ -41,6 +41,9 @@ type Config struct {
 	// IncludeLoopback will include loopback interfaces to be eligble for queries and answers.
 	IncludeLoopback bool
 
+	// DisableLinkLocal disables answering with the Link-Local Address
+	DisableLinkLocal bool
+
 	// Interfaces will override the interfaces used for queries and answers.
 	Interfaces []net.Interface
 }
diff --git a/conn.go b/conn.go
index e8aa392..f73fb27 100644
--- a/conn.go
+++ b/conn.go
@@ -877,6 +877,10 @@ func (c *Conn) readLoop(name string, pktConn ipPacketConn, inboundBufferSize int
 										continue
 									}
 
+									if config.DisableLinkLocal && ipCopy.IsLinkLocalUnicast() {
+										continue
+									}
+
 									selectedIP = ipCopy
 									break
 								}