1#ifndef __LINUX_IF_ADDR_H
2#define __LINUX_IF_ADDR_H
3
4#include <linux/netlink.h>
5
6struct ifaddrmsg
7{
8	__u8		ifa_family;
9	__u8		ifa_prefixlen;	/* The prefix length		*/
10	__u8		ifa_flags;	/* Flags			*/
11	__u8		ifa_scope;	/* Address scope		*/
12	__u32		ifa_index;	/* Link index			*/
13};
14
15/*
16 * Important comment:
17 * IFA_ADDRESS is prefix address, rather than local interface address.
18 * It makes no difference for normally configured broadcast interfaces,
19 * but for point-to-point IFA_ADDRESS is DESTINATION address,
20 * local address is supplied in IFA_LOCAL attribute.
21 */
22enum
23{
24	IFA_UNSPEC,
25	IFA_ADDRESS,
26	IFA_LOCAL,
27	IFA_LABEL,
28	IFA_BROADCAST,
29	IFA_ANYCAST,
30	IFA_CACHEINFO,
31	IFA_MULTICAST,
32	__IFA_MAX,
33};
34
35#define IFA_MAX (__IFA_MAX - 1)
36
37/* ifa_flags */
38#define IFA_F_SECONDARY		0x01
39#define IFA_F_TEMPORARY		IFA_F_SECONDARY
40
41#define	IFA_F_NODAD		0x02
42#define IFA_F_OPTIMISTIC	0x04
43#define	IFA_F_HOMEADDRESS	0x10
44#define IFA_F_DEPRECATED	0x20
45#define IFA_F_TENTATIVE		0x40
46#define IFA_F_PERMANENT		0x80
47
48struct ifa_cacheinfo
49{
50	__u32	ifa_prefered;
51	__u32	ifa_valid;
52	__u32	cstamp; /* created timestamp, hundredths of seconds */
53	__u32	tstamp; /* updated timestamp, hundredths of seconds */
54};
55
56/* backwards compatibility for userspace */
57#ifndef __KERNEL__
58#define IFA_RTA(r)  ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct ifaddrmsg))))
59#define IFA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct ifaddrmsg))
60#endif
61
62#endif
63