From fa87730e7a02e4b2781e527829c46244d22e2098 Mon Sep 17 00:00:00 2001
From: Giacomo Di Ciocco <54034335+gdiciocco@users.noreply.github.com>
Date: Mon, 10 Aug 2026 22:49:40 +0200
Subject: [PATCH] fix(rak4631_eth_gw): handle multicast socket exhaustion
 (#11132)

---
 src/platform/nrf52/AsyncUDP.cpp | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/platform/nrf52/AsyncUDP.cpp b/src/platform/nrf52/AsyncUDP.cpp
index 8c937d71f..5431597c5 100644
--- a/src/platform/nrf52/AsyncUDP.cpp
+++ b/src/platform/nrf52/AsyncUDP.cpp
@@ -8,8 +8,9 @@ bool AsyncUDP::listenMulticast(IPAddress multicastIP, uint16_t port, uint8_t ttl
 {
     if (!isMulticast(multicastIP))
         return false;
+    if (!udp.beginMulticast(multicastIP, port))
+        return false;
     localPort = port;
-    udp.beginMulticast(multicastIP, port);
     return true;
 }
 
@@ -80,4 +81,4 @@ int32_t AsyncUDP::runOnce()
     return 5; // check every 5ms
 }
 
-#endif // HAS_ETHERNET
\ No newline at end of file
+#endif // HAS_ETHERNET