From 2d0a2f564aec3eba21b741b54fb8ed8be17d3444 Mon Sep 17 00:00:00 2001
From: Tommaso Pecorella <tommaso.pecorella@unifi.it>
Date: Mon, 2 Oct 2023 23:01:19 +0200
Subject: [PATCH] network: clarify socket creation error message

---
 src/network/model/socket.cc | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/network/model/socket.cc b/src/network/model/socket.cc
index 064f0ff94..869efc8dd 100644
--- a/src/network/model/socket.cc
+++ b/src/network/model/socket.cc
@@ -73,9 +73,11 @@ Socket::CreateSocket(Ptr<Node> node, TypeId tid)
 {
     NS_LOG_FUNCTION(node << tid);
     Ptr<Socket> s;
-    NS_ASSERT(node);
+    NS_ASSERT_MSG(node, "CreateSocket: node is null.");
     Ptr<SocketFactory> socketFactory = node->GetObject<SocketFactory>(tid);
-    NS_ASSERT(socketFactory);
+    NS_ASSERT_MSG(socketFactory,
+                  "CreateSocket: can not create a "
+                      << tid.GetName() << " - perhaps the node is missing the required protocol.");
     s = socketFactory->CreateSocket();
     NS_ASSERT(s);
     return s;