diff --git a/ap/app/clatd/my_header.h b/ap/app/clatd/my_header.h
new file mode 100755
index 0000000..8835b23
--- /dev/null
+++ b/ap/app/clatd/my_header.h
@@ -0,0 +1,48 @@
+#ifndef _MY_HEADER_H_
+#define _MY_HEADER_H_
+
+/*
+ * Passing NETID_UNSET as the netId causes system/netd/server/DnsProxyListener.cpp to
+ * fill in the appropriate default netId for the query.
+ */
+#define NETID_UNSET 0u
+
+/*
+ * MARK_UNSET represents the default (i.e. unset) value for a socket mark.
+ */
+#define MARK_UNSET 0u
+
+
+/*
+ * Definition of type and code field values.
+ *	http://www.iana.org/assignments/icmp-parameters
+ */
+#define	ICMP_ECHOREPLY	0		/* echo reply */
+#define	ICMP_UNREACH	3		/* dest unreachable, codes: */
+#define	ICMP_UNREACH_NET		0	/* bad net */
+#define	ICMP_UNREACH_HOST		1	/* bad host */
+#define	ICMP_UNREACH_PROTOCOL	2	/* bad protocol */
+#define	ICMP_UNREACH_PORT		3	/* bad port */
+#define	ICMP_UNREACH_NEEDFRAG	4	/* IP_DF caused drop */
+#define	ICMP_UNREACH_NET_PROHIB		9	/* for crypto devs */
+#define	ICMP_UNREACH_HOST_PROHIB	10	/* ditto */
+#define	ICMP_UNREACH_FILTER_PROHIB	13	/* prohibited access */
+#define	ICMP_UNREACH_PRECEDENCE_CUTOFF	15	/* precedence cutoff */
+#define	ICMP_SOURCEQUENCH	4		/* packet lost, slow down */
+#define	ICMP_ECHO		   8		/* echo service */
+#define NETID_USE_LOCAL_NAMESERVERS 0x80000000
+
+#if 0
+struct ucred {
+  pid_t pid;
+  uid_t uid;
+  gid_t gid;
+};
+#endif
+
+#define AID_VPN  1016         /* vpn system */
+#define AID_CLAT 1029         /* clat part of nat464 */
+#define AID_INET 3003         /* can create AF_INET and AF_INET6 sockets */
+
+#endif
+