From 79bd47736c935c3c6c13466a5d73455a61c6802c Mon Sep 17 00:00:00 2001
From: goldsimon <goldsimon@gmx.de>
Date: Mon, 8 May 2017 21:18:40 +0200
Subject: [PATCH] SO_BROADCAST is valid for SOCK_DGRAM only

---
 src/api/sockets.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/api/sockets.c b/src/api/sockets.c
index 2c5d3d7d..d3511458 100644
--- a/src/api/sockets.c
+++ b/src/api/sockets.c
@@ -2448,6 +2448,10 @@ lwip_getsockopt_impl(int s, int level, int optname, void *optval, socklen_t *opt
 
     /* The option flags */
     case SO_BROADCAST:
+      if (NETCONNTYPE_GROUP(sock->conn->type) != SOCK_DGRAM) {
+        done_socket(sock);
+        return ENOPROTOOPT;
+      }
     case SO_KEEPALIVE:
 #if SO_REUSE
     case SO_REUSEADDR: