From 54ae7b1cd5f9a4701e1a401ef567ed86ee5f0e5e Mon Sep 17 00:00:00 2001
From: Neil Alexander <neilalexander@users.noreply.github.com>
Date: Tue, 27 Jul 2021 21:34:01 +0100
Subject: [PATCH] Don't panic when callbacks aren't set

---
 conn.go   | 4 +++-
 socket.go | 4 +++-
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/conn.go b/conn.go
index 1d4519f..cf8ef32 100644
--- a/conn.go
+++ b/conn.go
@@ -616,5 +616,7 @@ func (c *Conn) detach() {
 	s.lazyDestroy()
 	s.onMutex.RLock()
 	defer s.onMutex.RUnlock()
-	go s.onDetach(c.remoteSocketAddr)
+	if s.onDetach != nil {
+		go s.onDetach(c.remoteSocketAddr)
+	}
 }
diff --git a/socket.go b/socket.go
index cfe5ebe..eace399 100644
--- a/socket.go
+++ b/socket.go
@@ -445,7 +445,9 @@ func (s *Socket) registerConn(recvID uint16, remoteAddr resolvedAddrStr, c *Conn
 	s.conns[key] = c
 	s.onMutex.RLock()
 	defer s.onMutex.RUnlock()
-	go s.onAttach(c.remoteSocketAddr)
+	if s.onAttach != nil {
+		go s.onAttach(c.remoteSocketAddr)
+	}
 	return true
 }