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 +580,84 @@ TEST(PortSockTest, two_socket_datagram_communication)
 	EXPECT_EQ(OMRPORTLIB->sock_close(OMRPORTLIB, &serverSocket), 0);
 }
 
+/**
+ * Compare contents of timeval struct socket options.
+ * 
+ * @return 0 on success, return OMRPORT_ERROR_OPFAILED otherwise.
+ */
+int32_t compare_timeval(omrsock_timeval_t A, omrsock_timeval_t B) 
+{
+	if ((A->data.tv_sec != B->data.tv_sec) || (A->data.tv_usec != B->data.tv_usec)) {
+		return OMRPORT_ERROR_OPFAILED;
+	}
+	return 0;
+}
+
+/**
+ * Compare contents of linger struct socket options.
+ * 
+ * @return 0 on success, return OMRPORT_ERROR_OPFAILED otherwise.
+ */
+int32_t compare_linger(omrsock_linger_t A, omrsock_linger_t B) 
+{
+	if ((A->data.l_onoff != B->data.l_onoff) || (A->data.l_linger != B->data.l_linger)) {
+		return OMRPORT_ERROR_OPFAILED;
+	}
+	return 0;
+}
+
+/**
+ * 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());
+	OMRTimeval timeVal;
+	OMRLinger lingerVal;
+	omrsock_socket_t sock = NULL;
+
+	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);
+
+	/* 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. */
+	OMRTimeval timeResult;
+	OMRLinger lingerResult;
+	int32_t flagResult;
+
+	EXPECT_EQ(OMRPORTLIB->sock_getsockopt_int(OMRPORTLIB, sock, OMRSOCK_SOL_SOCKET, OMRSOCK_SO_KEEPALIVE, &flagResult), 0);
+	if (flagResult > 0)
+		SUCCEED();
+	else
+		FAIL();
+
+	EXPECT_EQ(OMRPORTLIB->sock_getsockopt_linger(OMRPORTLIB, sock, OMRSOCK_SOL_SOCKET, OMRSOCK_SO_LINGER, &lingerResult), 0);
+	EXPECT_EQ(compare_linger(&lingerResult, &lingerVal), 0);
+
+	EXPECT_EQ(OMRPORTLIB->sock_getsockopt_timeval(OMRPORTLIB, sock, OMRSOCK_SOL_SOCKET, OMRSOCK_SO_RCVTIMEO, &timeResult), 0);
+	EXPECT_EQ(compare_timeval(&timeResult, &timeVal), 0);
+
+	EXPECT_EQ(OMRPORTLIB->sock_getsockopt_timeval(OMRPORTLIB, sock, OMRSOCK_SOL_SOCKET, OMRSOCK_SO_SNDTIMEO, &timeResult), 0);
+	EXPECT_EQ(compare_timeval(&timeResult, &timeVal), 0);
+
+	EXPECT_EQ(OMRPORTLIB->sock_getsockopt_int(OMRPORTLIB, sock, OMRSOCK_IPPROTO_TCP, OMRSOCK_TCP_NODELAY, &flagResult), 0);
+	if (flagResult > 0)
+		SUCCEED();
+	else
+		FAIL();
+}
+
 #endif /* defined(OMR_PORT_SOCKET_SUPPORT) */