From d99a6fcb7ccd48831eb8b8fccebfded6ced1d2ee Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Miroslav=20=C5=A0ediv=C3=BD?= <sedivy.miro@gmail.com>
Date: Thu, 8 Dec 2022 21:18:58 +0100
Subject: [PATCH] Return ErrClosedPipe for writeTo

Return ErrClosedPipe for writeTo
---
 candidate_base.go | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/candidate_base.go b/candidate_base.go
index 289a0f4..3fb60f3 100644
--- a/candidate_base.go
+++ b/candidate_base.go
@@ -308,6 +308,10 @@ func (c *candidateBase) close() error {
 func (c *candidateBase) writeTo(raw []byte, dst Candidate) (int, error) {
 	n, err := c.conn.WriteTo(raw, dst.addr())
 	if err != nil {
+		// If the connection is closed, we should return the error
+		if errors.Is(err, io.ErrClosedPipe) {
+			return n, err
+		}
 		c.agent().log.Infof("%s: %v", errSendPacket, err)
 		return n, nil
 	}