1 files changed, 15 insertions, 7 deletions

diff --git a/zenhttp/httpasio.cpp b/zenhttp/httpasio.cpp
index 801bb51ac..f2d48200e 100644
--- a/zenhttp/httpasio.cpp
+++ b/zenhttp/httpasio.cpp
@@ -64,7 +64,7 @@ public:
 	HttpAsioServerImpl();
 	~HttpAsioServerImpl();
 
-	void		 Start(uint16_t Port, int ThreadCount);
+	int			 Start(uint16_t Port, int ThreadCount);
 	void		 Stop();
 	void		 RegisterService(const char* UrlPath, HttpService& Service);
 	HttpService* RouteRequest(std::string_view Url);
@@ -934,7 +934,12 @@ struct HttpAcceptor
 		m_Acceptor.set_option(asio::ip::v6_only(false));
 		m_Acceptor.set_option(asio::socket_base::reuse_address(true));
 		m_Acceptor.set_option(asio::ip::tcp::no_delay(true));
-		m_Acceptor.bind(asio::ip::tcp::endpoint(asio::ip::address_v6::any(), Port));
+		asio::error_code BindErrorCode;
+		m_Acceptor.bind(asio::ip::tcp::endpoint(asio::ip::address_v6::any(), Port), BindErrorCode);
+		if (BindErrorCode == asio::error::access_denied)
+		{
+			m_Acceptor.bind(asio::ip::tcp::endpoint(asio::ip::address_v6::any(), 0));
+		}
 		m_Acceptor.listen();
 	}
 
@@ -980,6 +985,8 @@ struct HttpAcceptor
 		});
 	}
 
+	int GetAcceptPort() { return m_Acceptor.local_endpoint().port(); }
+
 private:
 	HttpAsioServerImpl&		m_Server;
 	asio::io_service&		m_IoService;
@@ -1119,7 +1126,7 @@ HttpAsioServerImpl::~HttpAsioServerImpl()
 {
 }
 
-void
+int
 HttpAsioServerImpl::Start(uint16_t Port, int ThreadCount)
 {
 	ZEN_ASSERT(ThreadCount > 0);
@@ -1142,6 +1149,8 @@ HttpAsioServerImpl::Start(uint16_t Port, int ThreadCount)
 			}
 		});
 	}
+
+	return m_Acceptor->GetAcceptPort();
 }
 
 void
@@ -1212,12 +1221,11 @@ HttpAsioServer::RegisterService(HttpService& Service)
 	m_Impl->RegisterService(Service.BaseUri(), Service);
 }
 
-void
+int
 HttpAsioServer::Initialize(int BasePort)
 {
-	m_BasePort = BasePort;
-
-	m_Impl->Start(gsl::narrow<uint16_t>(m_BasePort), Max(std::thread::hardware_concurrency(), 8u));
+	m_BasePort = m_Impl->Start(gsl::narrow<uint16_t>(BasePort), Max(std::thread::hardware_concurrency(), 8u));
+	return m_BasePort;
 }
 
 void