diff --git a/include/netpacket/if_addr.h b/include/netpacket/if_addr.h
new file mode 100644
index 00000000000..8d12490ae09
--- /dev/null
+++ b/include/netpacket/if_addr.h
@@ -0,0 +1,110 @@
+/****************************************************************************
+ * include/netpacket/if_addr.h
+ *
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.  The
+ * ASF licenses this file to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance with the
+ * License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+ * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.  See the
+ * License for the specific language governing permissions and limitations
+ * under the License.
+ *
+ ****************************************************************************/
+
+#ifndef __INCLUDE_NETPACKET_IF_ADDR_H
+#define __INCLUDE_NETPACKET_IF_ADDR_H
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <sys/types.h>
+#include <netpacket/netlink.h>
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+#define IFA_MAX (__IFA_MAX - 1)
+
+/* ifa_flags */
+#define IFA_F_SECONDARY       0x01
+#define IFA_F_TEMPORARY       IFA_F_SECONDARY
+
+#define IFA_F_NODAD           0x02
+#define IFA_F_OPTIMISTIC      0x04
+#define IFA_F_DADFAILED       0x08
+#define IFA_F_HOMEADDRESS     0x10
+#define IFA_F_DEPRECATED      0x20
+#define IFA_F_TENTATIVE       0x40
+#define IFA_F_PERMANENT       0x80
+#define IFA_F_MANAGETEMPADDR 0x100
+#define IFA_F_NOPREFIXROUTE  0x200
+#define IFA_F_MCAUTOJOIN     0x400
+#define IFA_F_STABLE_PRIVACY 0x800
+
+/* backwards compatibility for userspace */
+#define IFA_RTA(r)  ((FAR struct rtattr *)(((FAR char *)(r)) + \
+                      NLMSG_ALIGN(sizeof(struct ifaddrmsg))))
+#define IFA_PAYLOAD(n) NLMSG_PAYLOAD(n, sizeof(struct ifaddrmsg))
+
+/****************************************************************************
+ * Public Type Definitions
+ ****************************************************************************/
+
+/* RTM_NEWADDR, RTM_DELADDR, RTM_GETADDR
+ *
+ * Add, remove or receive information about an IP address associated with
+ * an interface.  These messages contain an ifaddrmsg structure, optionally
+ * followed by rtattr routing attributes.
+ */
+
+struct ifaddrmsg
+{
+  uint8_t  ifa_family;    /* Address type:  AF_INET or AF_INET6 */
+  uint8_t  ifa_prefixlen; /* Prefix length of address */
+  uint8_t  ifa_flags;     /* Address flags.  See IFA_F_* definitions */
+  uint8_t  ifa_scope;     /* Address scope */
+  int32_t  ifa_index;     /* Unique interface index */
+};
+
+/* Important comment:
+ * IFA_ADDRESS is prefix address, rather than local interface address.
+ * It makes no difference for normally configured broadcast interfaces,
+ * but for point-to-point IFA_ADDRESS is DESTINATION address,
+ * local address is supplied in IFA_LOCAL attribute.
+ *
+ * IFA_FLAGS is a u32 attribute that extends the u8 field ifa_flags.
+ * If present, the value from struct ifaddrmsg will be ignored.
+ */
+
+enum
+{
+  IFA_UNSPEC,
+  IFA_ADDRESS,
+  IFA_LOCAL,
+  IFA_LABEL,
+  IFA_BROADCAST,
+  IFA_ANYCAST,
+  IFA_CACHEINFO,
+  IFA_MULTICAST,
+  IFA_FLAGS,
+  __IFA_MAX,
+};
+
+struct ifa_cacheinfo
+{
+  uint32_t ifa_prefered;
+  uint32_t ifa_valid;
+  uint32_t cstamp; /* created timestamp, hundredths of seconds */
+  uint32_t tstamp; /* updated timestamp, hundredths of seconds */
+};
+
+#endif /* __INCLUDE_NETPACKET_IF_ADDR_H */
diff --git a/include/netpacket/netlink.h b/include/netpacket/netlink.h
index f0afa9fc986..b3f238d62ad 100644
--- a/include/netpacket/netlink.h
+++ b/include/netpacket/netlink.h
@@ -46,6 +46,8 @@
 #include <sys/socket.h>
 #include <stdint.h>
 
+#include <netpacket/if_addr.h>
+
 /****************************************************************************
  * Pre-processor Definitions
  ****************************************************************************/
@@ -291,21 +293,6 @@
 #define RTM_BASE             16
 #define RTM_MAX              67
 
-/* Definitions for struct ifaddrmsg  ****************************************/
-
-#define IFA_RTA(r)          ((FAR struct rtattr *) \
-                             (((FAR char *)(r)) + \
-                              NLMSG_ALIGN(sizeof(struct ifaddrmsg))))
-#define IFA_PAYLOAD(n)      NLMSG_PAYLOAD(n, sizeof(struct ifaddrmsg))
-
-/* ifa_flags definitions:  ifa_flags is a flag word of IFA_F_SECONDARY for
- * secondary address (old alias interface), IFA_F_PERMANENT for a permanent
- * address set by the user and other undocumented flags.
- */
-
-#define IFA_F_SECONDARY      0x01
-#define IFA_F_PERMANENT      0x80
-
 /* Definitions for struct ifinfomsg *****************************************/
 
 #define IFLA_RTA(r)          ((FAR struct rtattr *) \
@@ -483,22 +470,6 @@ struct rtgenmsg
   uint8_t  rtgen_family;
 };
 
-/* RTM_NEWADDR, RTM_DELADDR, RTM_GETADDR
- *
- * Add, remove or receive information about an IP address associated with
- * an interface.  These messages contain an ifaddrmsg structure, optionally
- * followed by rtattr routing attributes.
- */
-
-struct ifaddrmsg
-{
-  uint8_t  ifa_family;    /* Address type:  AF_INET or AF_INET6 */
-  uint8_t  ifa_prefixlen; /* Prefix length of address */
-  uint8_t  ifa_flags;     /* Address flags.  See IFA_F_* definitions */
-  uint8_t  ifa_scope;     /* Address scope */
-  int32_t  ifa_index;     /* Unique interface index */
-};
-
 /* RTM_NEWNEIGH, RTM_DELNEIGH, RTM_GETNEIGH
  *   Add, remove or receive information about a neighbor table entry (e.g.,
  *   an ARP entry).  The message contains an ndmsg structure.