From 625c565c0b6a3f8cec2fd229614743bbac81180a Mon Sep 17 00:00:00 2001
From: sago35 <sago35@gmail.com>
Date: Sat, 23 Jul 2022 13:58:12 +0900
Subject: [PATCH] rtl8720dn: improve error handling

---
 rtl8720dn/netdriver.go | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/rtl8720dn/netdriver.go b/rtl8720dn/netdriver.go
index fb01982..15489ee 100644
--- a/rtl8720dn/netdriver.go
+++ b/rtl8720dn/netdriver.go
@@ -118,6 +118,9 @@ func (r *RTL8720DN) ConnectSSLSocket(addr, port string) error {
 	if r.debug {
 		fmt.Printf("ConnectSSLSocket(%q, %q)\r\n", addr, port)
 	}
+	if r.root_ca == nil {
+		return fmt.Errorf("root_ca is not set")
+	}
 
 	client, err := r.Rpc_wifi_ssl_client_create()
 	if err != nil {