[IPv4]: Move interface address bits to linux/if_addr.h

Signed-off-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 53 insertions, 0 deletions

diff --git a/include/linux/if_addr.h b/include/linux/if_addr.h
new file mode 100644
index 000000000000..e1590454db59
--- /dev/null
+++ b/include/linux/if_addr.h
@@ -0,0 +1,53 @@
+#ifndef __LINUX_IF_ADDR_H
+#define __LINUX_IF_ADDR_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_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 */
+};
+
+#endif