From: Mikko Rasa <tdb@tdb.fi>
Date: Fri, 9 Dec 2022 18:32:46 +0000 (+0200)
Subject: Don't allow duplicate listen calls
X-Git-Url: http://git.tdb.fi/?a=commitdiff_plain;h=32713c673d335f0d4667005a9e6f658e8a616e8f;p=libs%2Fnet.git

Don't allow duplicate listen calls

Also add a function to check if the socket is already listening
---

diff --git a/source/net/streamserversocket.cpp b/source/net/streamserversocket.cpp
index 817145b..9b583a1 100644
--- a/source/net/streamserversocket.cpp
+++ b/source/net/streamserversocket.cpp
@@ -20,6 +20,9 @@ StreamServerSocket::StreamServerSocket(Family af, int proto):
 
 void StreamServerSocket::listen(const SockAddr &addr, unsigned backlog)
 {
+	if(listening)
+		throw bad_socket_state("already listening");
+
 	bind(addr);
 
 	int err = ::listen(priv->handle, backlog);
diff --git a/source/net/streamserversocket.h b/source/net/streamserversocket.h
index aa4868c..3152265 100644
--- a/source/net/streamserversocket.h
+++ b/source/net/streamserversocket.h
@@ -16,6 +16,7 @@ public:
 	StreamServerSocket(Family, int = 0);
 
 	virtual void listen(const SockAddr &, unsigned = 4);
+	bool is_listening() const { return listening; }
 	virtual StreamSocket *accept();
 };