fix: reorder includes for Windows compatibility and add missing POSIX headers

Author: amyssnippet

src/tcp_wrap.cc

@@ -19,7 +19,15 @@
 // OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
 // USE OR OTHER DEALINGS IN THE SOFTWARE.
 
-#include "tcp_wrap.h"
+#include "tcp_wrap.h"  // 1. Implementation header first
+
+// 2. Windows System Headers (MUST BE BEFORE Node.js internals)
+#ifdef _WIN32
+#include <winsock2.h>
+#include <ws2tcpip.h>
+#endif
+
+// 3. Node.js Internal Headers
 #include "connect_wrap.h"
 #include "connection_wrap.h"
 #include "env-inl.h"
@@ -31,13 +39,15 @@
 #include "stream_base-inl.h"
 #include "stream_wrap.h"
 #include "util-inl.h"
+
+// 4. Standard C++ & POSIX Headers
 #include <cerrno>
 #include <cstdlib>
-#ifdef _WIN32
-#include <ws2tcpip.h>
-#endif
+
 #ifndef _WIN32
-#include <netinet/in.h>
+#include <netinet/in.h> // Required for IPPROTO_IP
+#include <netinet/ip.h> // Required for IP_TOS
+#include <netinet/ip6.h> // Required for IPV6_TCLASS
 #include <sys/socket.h>
 #endif