Added socket options related tests to omrsockTest.cpp

Added a new test socket_options that calls set/get sockopt

- Added test that initializes timeval and linger structs.
- Created a socket and set options including keepalive, linger,
  rcvtimeo, sndtimeo, tcp_nodelay.
- Get the same options and compare with values inputted into
  set options, and make sure they are the same.

Issue: eclipse-omr#5158

Signed-off-by: Haley Cao <haleycao88@hotmail.com>

fvtest/porttest/omrsockTest.cpp

@@ -580,4 +580,107 @@ TEST(PortSockTest, two_socket_datagram_communication)
 	EXPECT_EQ(OMRPORTLIB->sock_close(OMRPORTLIB, &serverSocket), 0);
 }
 
+/**
+ * Equal operator to compare contents of timeval struct socket options.
+ */
+bool operator==(const OMRTimeval& lhs, const OMRTimeval& rhs) 
+{
+	if ((lhs.data.tv_sec != rhs.data.tv_sec) || (lhs.data.tv_usec != rhs.data.tv_usec)) {
+		return false;
+	}
+	return true;
+}
+
+/**
+ * Equal operator to compare contents of linger struct socket options.
+ */
+bool operator==(const OMRLinger& lhs, const OMRLinger& rhs) 
+{
+	if ((lhs.data.l_onoff != rhs.data.l_onoff) || (lhs.data.l_linger != rhs.data.l_linger)) {
+		return false;
+	}
+	return true;
+}
+
+namespace OMRSock
+{
+	typedef OMRTimeval OMRTimevalTest;
+	typedef OMRLinger OMRLingerTest;
+
+	/**
+	* Print contents of OMRTimeval struct when comparing contents of linger struct socket options.
+	*/
+	void
+	printTo(const OMRTimevalTest& x, std::ostream *os)
+	{
+  		*os << "{" << x.data.tv_sec << ", " <<  x.data.tv_usec << "}";
+
+	}
+
+	/**
+	 * Print contents of OMRLinger struct when comparing contents of linger struct socket options.
+	 */
+	void
+	printTo(const OMRLingerTest& x, std::ostream *os)
+	{
+		*os << "{" << x.data.l_onoff << ", " <<  x.data.l_linger << "}";
+	}
+
+	/**
+	* Test socket options functions by test setting and getting the socket options.
+	*
+	* First, the linger and timeval structs will be allocated and the corresponding
+	* init functions will be called to set up those structs. Then, an arbitrary IPv4
+	* stream socket will be opened and the socket options will be set and get. The 
+	* test will check if the set and get option values are the same.
+	*/
+	TEST(PortSockTest, socket_options)
+	{
+		OMRPORT_ACCESS_FROM_OMRPORT(portTestEnv->getPortLibrary());
+		OMRSock::OMRTimevalTest timeVal;
+		OMRSock::OMRLingerTest lingerVal;
+		omrsock_socket_t sock = NULL;
+
+		OMRSock::OMRTimevalTest timeTest;
+		OMRSock::OMRLingerTest lingerTest;
+		EXPECT_EQ(OMRPORTLIB->sock_timeval_init(OMRPORTLIB, &timeTest, 3, 0), 0);
+		EXPECT_EQ(OMRPORTLIB->sock_linger_init(OMRPORTLIB, &lingerTest, 1, 3), 0);
+
+		EXPECT_EQ(OMRPORTLIB->sock_timeval_init(OMRPORTLIB, &timeVal, 2, 0), 0);
+		EXPECT_EQ(OMRPORTLIB->sock_linger_init(OMRPORTLIB, &lingerVal, 1, 2), 0);
+		ASSERT_EQ(OMRPORTLIB->sock_socket(OMRPORTLIB, &sock, OMRSOCK_AF_INET, OMRSOCK_STREAM, OMRSOCK_IPPROTO_DEFAULT), 0);
+
+		EXPECT_EQ(lingerTest, lingerVal);
+		EXPECT_EQ(timeTest, timeVal);
+
+		/* Call omrsock_setsockopt to set socket options. */
+		int32_t flag = 1;
+		EXPECT_EQ(OMRPORTLIB->sock_setsockopt_int(OMRPORTLIB, sock, OMRSOCK_SOL_SOCKET, OMRSOCK_SO_KEEPALIVE, &flag), 0);
+		EXPECT_EQ(OMRPORTLIB->sock_setsockopt_linger(OMRPORTLIB, sock, OMRSOCK_SOL_SOCKET, OMRSOCK_SO_LINGER, &lingerVal), 0);
+		EXPECT_EQ(OMRPORTLIB->sock_setsockopt_timeval(OMRPORTLIB, sock, OMRSOCK_SOL_SOCKET, OMRSOCK_SO_RCVTIMEO, &timeVal), 0);
+		EXPECT_EQ(OMRPORTLIB->sock_setsockopt_timeval(OMRPORTLIB, sock, OMRSOCK_SOL_SOCKET, OMRSOCK_SO_SNDTIMEO, &timeVal), 0);
+		EXPECT_EQ(OMRPORTLIB->sock_setsockopt_int(OMRPORTLIB, sock, OMRSOCK_IPPROTO_TCP, OMRSOCK_TCP_NODELAY, &flag), 0);
+
+		/* Call omrsock_getsockopt to check if the results matches the inputs earlier. */
+		OMRSock::OMRTimevalTest timeResult;
+		OMRSock::OMRLingerTest lingerResult;
+		int32_t flagResult;
+
+		EXPECT_EQ(OMRPORTLIB->sock_getsockopt_int(OMRPORTLIB, sock, OMRSOCK_SOL_SOCKET, OMRSOCK_SO_KEEPALIVE, &flagResult), 0);
+		EXPECT_GE(flagResult, 0);
+
+		EXPECT_EQ(OMRPORTLIB->sock_getsockopt_linger(OMRPORTLIB, sock, OMRSOCK_SOL_SOCKET, OMRSOCK_SO_LINGER, &lingerResult), 0);
+		EXPECT_EQ(lingerResult, lingerVal);
+
+		EXPECT_EQ(OMRPORTLIB->sock_getsockopt_timeval(OMRPORTLIB, sock, OMRSOCK_SOL_SOCKET, OMRSOCK_SO_RCVTIMEO, &timeResult), 0);
+		EXPECT_EQ(timeResult, timeVal);
+
+		EXPECT_EQ(OMRPORTLIB->sock_getsockopt_timeval(OMRPORTLIB, sock, OMRSOCK_SOL_SOCKET, OMRSOCK_SO_SNDTIMEO, &timeResult), 0);
+		EXPECT_EQ(timeResult, timeVal);
+
+		EXPECT_EQ(OMRPORTLIB->sock_getsockopt_int(OMRPORTLIB, sock, OMRSOCK_IPPROTO_TCP, OMRSOCK_TCP_NODELAY, &flagResult), 0);
+		EXPECT_GE(flagResult, 0);
+	}
+}
+
 #endif /* defined(OMR_PORT_SOCKET_SUPPORT) */