1 files changed, 61 insertions, 0 deletions

diff --git a/include/uapi/linux/if_addr.h b/include/uapi/linux/if_addr.h
new file mode 100644
index 000000000000..23357ab81a77
--- /dev/null
+++ b/include/uapi/linux/if_addr.h
@@ -0,0 +1,61 @@
+#ifndef __LINUX_IF_ADDR_H
+#define __LINUX_IF_ADDR_H
+
+#include <linux/types.h>
+#include <linux/netlink.h>
+
+struct ifaddrmsg {
+        __u8            ifa_family;
+        __u8            ifa_prefixlen;  /* The prefix length            */
+        __u8            ifa_flags;      /* Flags                        */
+        __u8            ifa_scope;      /* Address scope                */
+        __u32           ifa_index;      /* Link 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.
+ */
+enum {
+        IFA_UNSPEC,
+        IFA_ADDRESS,
+        IFA_LOCAL,
+        IFA_LABEL,
+        IFA_BROADCAST,
+        IFA_ANYCAST,
+        IFA_CACHEINFO,
+        IFA_MULTICAST,
+        __IFA_MAX,
+};
+
+#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
+
+struct ifa_cacheinfo {
+        __u32   ifa_prefered;
+        __u32   ifa_valid;
+        __u32   cstamp; /* created timestamp, hundredths of seconds */
+        __u32   tstamp; /* updated timestamp, hundredths of seconds */
+};
+
+/* backwards compatibility for userspace */
+#ifndef __KERNEL__
+#define IFA_RTA(r)  ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct ifaddrmsg))))
+#define IFA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct ifaddrmsg))
+#endif
+
+#endif