Added Stream Communication Test with Send and Recv

- Contains a short test for stream communications between
  server and client.
- Server sends a message to client and client receives the
  message and then a comparison is done to see if the messages
  match.
- There is a while loop which loops if the message for some reason
  was not completely sent. In that case, it is the users'
  responsibilities to resend the remaining message.

Issue: eclipse-omr#5069

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

fvtest/porttest/omrsockTest.cpp

@@ -537,6 +537,41 @@ TEST(PortSockTest, two_socket_stream_communication)
 	omrsock_socket_t connectedClientStreamSocket = NULL;
 	EXPECT_EQ(OMRPORTLIB->sock_accept(OMRPORTLIB, serverStreamSocket, &connectedClientStreamSockAddr, &connectedClientStreamSocket), 0);
 
+	char msg[100] = "This is an omrsock test for 2 socket stream communications.";
+	int32_t bytesLeft = strlen(msg) + 1;
+	uint8_t *cursor = (uint8_t *)msg;
+	int32_t bytesSent = 0;
+	while(1) {
+		bytesSent = OMRPORTLIB->sock_send(OMRPORTLIB, connectedClientStreamSocket, cursor, bytesLeft, 0);
+		if (bytesSent < 0) {
+			FAIL();
+			break;
+		}
+		bytesLeft -= bytesSent;
+		cursor += bytesSent;
+		if (0 == bytesLeft) {
+			break;
+		}
+	}
+
+	char buf[100] = "";
+	bytesLeft = strlen(msg) + 1;
+	cursor = (uint8_t *)buf;
+	int32_t bytesRecv = 0;
+	while(1) {
+		bytesRecv = OMRPORTLIB->sock_recv(OMRPORTLIB, clientStreamSocket, cursor, bytesLeft, 0);
+		if (bytesRecv < 0) {
+			FAIL();
+			break;
+		}
+		bytesLeft -= bytesRecv;
+		cursor += bytesRecv;
+		if (0 == bytesLeft) {
+			break;
+		}
+	}
+	EXPECT_EQ(strcmp(msg, buf), 0);
+
 	EXPECT_EQ(OMRPORTLIB->sock_close(OMRPORTLIB, &connectedClientStreamSocket), 0);
 	EXPECT_EQ(OMRPORTLIB->sock_close(OMRPORTLIB, &clientStreamSocket), 0);
 	EXPECT_EQ(OMRPORTLIB->sock_close(OMRPORTLIB, &serverStreamSocket), 0);

port/unix/omrsock.c

@@ -475,7 +475,7 @@ omrsock_bind(struct OMRPortLibrary *portLibrary, omrsock_socket_t sock, omrsock_
 
 	if (bind(sock->data, (struct sockaddr *)&addr->data, addrlength) < 0) {
 		portLibrary->error_set_last_error(portLibrary, errno, OMRPORT_ERROR_SOCK_BIND_FAILED);
-		return OMRPORT_ERROR_SOCK_BIND_FAILED;
+		return errno;
 	}
 
 	return 0;