Merge pull request #984 from pennam/hostname-fix

patch: check for user network interface before reading hostname

patches/0244-Add-user-network-interface-check-before-reading-host.patch

@@ -0,0 +1,31 @@
+From 4292f8b7c4aa38b68d22c413f91bdc95192cfad6 Mon Sep 17 00:00:00 2001
+From: pennam <[email protected]>
+Date: Tue, 29 Oct 2024 11:30:00 +0100
+Subject: [PATCH] Add user network interface check before reading hostname
+
+---
+ connectivity/lwipstack/source/LWIPInterface.cpp | 8 +++++---
+ 1 file changed, 5 insertions(+), 3 deletions(-)
+
+diff --git a/connectivity/lwipstack/source/LWIPInterface.cpp b/connectivity/lwipstack/source/LWIPInterface.cpp
+index 64869a3538..da964543c7 100644
+--- a/connectivity/lwipstack/source/LWIPInterface.cpp
++++ b/connectivity/lwipstack/source/LWIPInterface.cpp
+@@ -446,9 +446,11 @@ nsapi_error_t LWIP::add_ethernet_interface(EMAC &emac, bool default_if, OnboardN
+     interface->memory_manager = &memory_manager;
+     interface->ppp_enabled = false;
+
+-    hostname = user_network_interface->get_hostname();
+-    if (hostname) {
+-        netif_set_hostname(&interface->netif, hostname);
++    if (user_network_interface) {
++        hostname = user_network_interface->get_hostname();
++        if (hostname) {
++            netif_set_hostname(&interface->netif, hostname);
++        }
+     }
+
+ #if (MBED_MAC_ADDRESS_SUM != MBED_MAC_ADDR_INTERFACE)
+-- 
+2.45.2
+