1 files changed, 132 insertions, 0 deletions

diff --git a/tests/Network/EchoServer.cpp b/tests/Network/EchoServer.cpp
new file mode 100644
index 000000000..728db0b7c
--- /dev/null
+++ b/tests/Network/EchoServer.cpp
@@ -0,0 +1,132 @@
+
+// EchoServer.cpp
+
+// Implements an Echo server using the LibEvent-based cNetwork API, as a test of that API
+
+#include "Globals.h"
+#include <iostream>
+#include <string>
+#include "OSSupport/Network.h"
+
+
+
+
+
+/** cTCPLink callbacks that echo everything they receive back to the remote peer. */
+class cEchoLinkCallbacks:
+	public cTCPLink::cCallbacks
+{
+	// cTCPLink::cCallbacks overrides:
+	virtual void OnLinkCreated(cTCPLinkPtr a_Link) override
+	{
+		ASSERT(m_Link == nullptr);
+		m_Link = a_Link;
+	}
+
+
+	virtual void OnReceivedData(const char * a_Data, size_t a_Size) override
+	{
+		ASSERT(m_Link != nullptr);
+
+		// Echo the incoming data back to outgoing data:
+		LOGD("%p (%s:%d): Data received (%u bytes), echoing back.", m_Link.get(), m_Link->GetRemoteIP().c_str(), m_Link->GetRemotePort(), static_cast<unsigned>(a_Size));
+		m_Link->Send(a_Data, a_Size);
+		LOGD("Echo queued");
+
+		// Search for a Ctrl+Z, if found, drop the connection:
+		for (size_t i = 0; i < a_Size; i++)
+		{
+			if (a_Data[i] == '\x1a')
+			{
+				m_Link->Close();
+				m_Link.reset();
+				return;
+			}
+		}
+	}
+
+
+	virtual void OnRemoteClosed(void) override
+	{
+		ASSERT(m_Link != nullptr);
+
+		LOGD("%p (%s:%d): Remote has closed the connection.", m_Link.get(), m_Link->GetRemoteIP().c_str(), m_Link->GetRemotePort());
+		m_Link.reset();
+	}
+
+
+	virtual void OnError(int a_ErrorCode, const AString & a_ErrorMsg) override
+	{
+		ASSERT(m_Link != nullptr);
+
+		LOGD("%p (%s:%d): Error %d in the cEchoLinkCallbacks: %s", m_Link.get(), m_Link->GetRemoteIP().c_str(), m_Link->GetRemotePort(), a_ErrorCode, a_ErrorMsg.c_str());
+		m_Link.reset();
+	}
+
+	/** The link attached to this callbacks instance. */
+	cTCPLinkPtr m_Link;
+};
+
+
+
+
+
+class cEchoServerCallbacks:
+	public cNetwork::cListenCallbacks
+{
+	virtual cTCPLink::cCallbacksPtr OnIncomingConnection(const AString & a_RemoteIPAddress, UInt16 a_RemotePort)
+	{
+		LOGD("New incoming connection(%s:%d).", a_RemoteIPAddress.c_str(), a_RemotePort);
+		return std::make_shared<cEchoLinkCallbacks>();
+	}
+
+	virtual void OnAccepted(cTCPLink & a_Link) override
+	{
+		LOGD("New client accepted (%s:%d), sending welcome message.", a_Link.GetRemoteIP().c_str(), a_Link.GetRemotePort());
+		// Send a welcome message to each connecting client:
+		a_Link.Send("Welcome to the simple echo server.\r\n");
+		LOGD("Welcome message queued.");
+	}
+
+	virtual void OnError(int a_ErrorCode, const AString & a_ErrorMsg) override
+	{
+		LOGWARNING("An error occured while listening for connections: %d (%s).", a_ErrorCode, a_ErrorMsg.c_str());
+	}
+};
+
+
+
+
+
+int main()
+{
+	LOGD("EchoServer: starting up");
+	cServerHandlePtr Server = cNetwork::Listen(9876, std::make_shared<cEchoServerCallbacks>());
+	if (!Server->IsListening())
+	{
+		LOGWARNING("Cannot listen on port 9876");
+		abort();
+	}
+	ASSERT(Server->IsListening());
+
+	// Wait for the user to terminate the server:
+	printf("Press enter to close the server.\n");
+	AString line;
+	std::getline(std::cin, line);
+
+	// Close the server and all its active connections:
+	LOG("Server terminating.");
+	Server->Close();
+	ASSERT(!Server->IsListening());
+	LOGD("Server has been closed.");
+
+	printf("Press enter to exit test.\n");
+	std::getline(std::cin, line);
+
+	LOG("Network test finished.");
+	return 0;
+}
+
+
+
+