#define UDP_SRC_PORT 1024
#define UDP_DST_PORT 1024
-#define IP_SRC_ADDR ((192 << 24) | (168 << 16) | (0 << 8) | 1)
-#define IP_DST_ADDR ((192 << 24) | (168 << 16) | (0 << 8) | 2)
+#define IP_SRC_ADDR ((192U << 24) | (168 << 16) | (0 << 8) | 1)
+#define IP_DST_ADDR ((192U << 24) | (168 << 16) | (0 << 8) | 2)
#define IP_DEFTTL 64 /* from RFC 1340. */
#define IP_VERSION 0x40