Major plugin refactor and cleanup.

Switched to POCO library for unified platform/library interface.
Deprecated the external module API. It was creating more problems than solving.
Removed most built-in libraries in favor of system libraries for easier maintenance.
Cleaned and secured code with help from static analyzers.

vendor/POCO/Net/testsuite/src/RawSocketTest.cpp

@@ -0,0 +1,105 @@
+//
+// RawSocketTest.cpp
+//
+// Copyright (c) 2005-2006, Applied Informatics Software Engineering GmbH.
+// and Contributors.
+//
+// SPDX-License-Identifier:	BSL-1.0
+//
+
+
+#include "RawSocketTest.h"
+#include "CppUnit/TestCaller.h"
+#include "CppUnit/TestSuite.h"
+#include "Poco/Net/RawSocket.h"
+#include "Poco/Net/RawSocketImpl.h"
+#include "Poco/Net/SocketAddress.h"
+#include "Poco/Net/NetException.h"
+#include "Poco/Timespan.h"
+#include "Poco/Stopwatch.h"
+
+
+using Poco::Net::Socket;
+using Poco::Net::RawSocket;
+using Poco::Net::RawSocketImpl;
+using Poco::Net::SocketAddress;
+using Poco::Net::IPAddress;
+using Poco::Timespan;
+using Poco::Stopwatch;
+using Poco::TimeoutException;
+using Poco::InvalidArgumentException;
+using Poco::IOException;
+
+
+RawSocketTest::RawSocketTest(const std::string& name): CppUnit::TestCase(name)
+{
+}
+
+
+RawSocketTest::~RawSocketTest()
+{
+}
+
+
+void RawSocketTest::testEchoIPv4()
+{
+	SocketAddress sa("127.0.0.1", 0);
+	RawSocket rs(IPAddress::IPv4);
+	rs.connect(sa);
+
+	int n = rs.sendBytes("hello", 5);
+	assertTrue (5 == n);
+
+	char buffer[256] = "";
+	unsigned char* ptr = (unsigned char*) buffer;
+
+	n = rs.receiveBytes(buffer, sizeof(buffer));
+	int shift = ((buffer[0] & 0x0F) * 4);
+	ptr += shift;
+
+	assertTrue (5 == (n - shift));
+	assertTrue ("hello" == std::string((char*)ptr, 5));
+
+	rs.close(); 
+}
+
+
+void RawSocketTest::testSendToReceiveFromIPv4()
+{
+	RawSocket rs(IPAddress::IPv4);
+	
+	int n = rs.sendTo("hello", 5, SocketAddress("127.0.0.1", 0));
+	assertTrue (n == 5);
+
+	char buffer[256] = "";
+	unsigned char* ptr = (unsigned char*) buffer;
+	SocketAddress sa;
+	n = rs.receiveFrom(buffer, sizeof(buffer), sa);
+	int shift = ((buffer[0] & 0x0F) * 4);
+	ptr += shift;
+
+	assertTrue ((n - shift) == 5);
+	assertTrue ("hello" == std::string((char*)ptr, 5));
+	rs.close();
+}
+
+
+void RawSocketTest::setUp()
+{
+}
+
+
+void RawSocketTest::tearDown()
+{
+}
+
+
+CppUnit::Test* RawSocketTest::suite()
+{
+	CppUnit::TestSuite* pSuite = new CppUnit::TestSuite("RawSocketTest");
+
+	CppUnit_addTest(pSuite, RawSocketTest, testEchoIPv4);
+	CppUnit_addTest(pSuite, RawSocketTest, testSendToReceiveFromIPv4);
+
+	return pSuite;
+}