From 721bf9fa7789cf99251c4cd40fc15764dcc77773 Mon Sep 17 00:00:00 2001
From: Matt Brittan <matt@brittan.nz>
Date: Tue, 28 Dec 2021 15:37:52 +1300
Subject: [PATCH] If c.options.Dialer was nil this caused a panic. Only an
 issue if ClientOptions is manually created.

---
 client.go | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/client.go b/client.go
index 5cea7219..06ee61aa 100644
--- a/client.go
+++ b/client.go
@@ -392,11 +392,16 @@ func (c *client) attemptConnection() (net.Conn, byte, bool, error) {
 			DEBUG.Println(CLI, "using custom onConnectAttempt handler...")
 			tlsCfg = c.options.OnConnectAttempt(broker, c.options.TLSConfig)
 		}
+		dialer := c.options.Dialer
+		if dialer == nil { //
+			WARN.Println(CLI, "dialer was nil, using default")
+			dialer = &net.Dialer{Timeout: 30 * time.Second}
+		}
 		// Start by opening the network connection (tcp, tls, ws) etc
 		if c.options.CustomOpenConnectionFn != nil {
 			conn, err = c.options.CustomOpenConnectionFn(broker, c.options)
 		} else {
-			conn, err = openConnection(broker, tlsCfg, c.options.ConnectTimeout, c.options.HTTPHeaders, c.options.WebsocketOptions, c.options.Dialer)
+			conn, err = openConnection(broker, tlsCfg, c.options.ConnectTimeout, c.options.HTTPHeaders, c.options.WebsocketOptions, dialer)
 		}
 		if err != nil {
 			ERROR.Println(CLI, err.Error())