- ICMP_NET_UNREACHABLE = 0,\r
- ICMP_HOST_UNREACHABLE = 1,\r
- ICMP_PROTO_UNREACHABLE = 2, // Host may generate\r
- ICMP_PORT_UNREACHABLE = 3, // Host may generate\r
- ICMP_FRAGMENT_FAILED = 4,\r
- ICMP_SOURCEROUTE_FAILED = 5, // Host may generate\r
- ICMP_NET_UNKNOWN = 6,\r
- ICMP_HOST_UNKNOWN = 7,\r
- ICMP_SOURCE_ISOLATED = 8,\r
- ICMP_NET_PROHIBITED = 9,\r
- ICMP_HOST_PROHIBITED = 10,\r
- ICMP_NET_UNREACHABLE_TOS = 11,\r
- ICMP_HOST_UNREACHABLE_TOS = 12,\r
+#define ICMP_NET_UNREACHABLE 0\r
+#define ICMP_HOST_UNREACHABLE 1\r
+#define ICMP_PROTO_UNREACHABLE 2 // Host may generate\r
+#define ICMP_PORT_UNREACHABLE 3 // Host may generate\r
+#define ICMP_FRAGMENT_FAILED 4\r
+#define ICMP_SOURCEROUTE_FAILED 5 // Host may generate\r
+#define ICMP_NET_UNKNOWN 6\r
+#define ICMP_HOST_UNKNOWN 7\r
+#define ICMP_SOURCE_ISOLATED 8\r
+#define ICMP_NET_PROHIBITED 9\r
+#define ICMP_HOST_PROHIBITED 10\r
+#define ICMP_NET_UNREACHABLE_TOS 11\r
+#define ICMP_HOST_UNREACHABLE_TOS 12\r