if_addr.h revision f40554f68722aa37c25ae7ab99a1f997e1c59428 
1#ifndef __LINUX_IF_ADDR_H
2#define __LINUX_IF_ADDR_H
3
4#include <linux/types.h>
5#include <linux/netlink.h>
6
7struct ifaddrmsg
8{
9	__u8		ifa_family;
10	__u8		ifa_prefixlen;	/* The prefix length		*/
11	__u8		ifa_flags;	/* Flags			*/
12	__u8		ifa_scope;	/* Address scope		*/
13	__u32		ifa_index;	/* Link index			*/
14};
15
16/*
17 * Important comment:
18 * IFA_ADDRESS is prefix address, rather than local interface address.
19 * It makes no difference for normally configured broadcast interfaces,
20 * but for point-to-point IFA_ADDRESS is DESTINATION address,
21 * local address is supplied in IFA_LOCAL attribute.
22 */
23enum
24{
25	IFA_UNSPEC,
26	IFA_ADDRESS,
27	IFA_LOCAL,
28	IFA_LABEL,
29	IFA_BROADCAST,
30	IFA_ANYCAST,
31	IFA_CACHEINFO,
32	IFA_MULTICAST,
33	__IFA_MAX,
34};
35
36#define IFA_MAX (__IFA_MAX - 1)
37
38/* ifa_flags */
39#define IFA_F_SECONDARY		0x01
40#define IFA_F_TEMPORARY		IFA_F_SECONDARY
41
42#define	IFA_F_NODAD		0x02
43#define IFA_F_OPTIMISTIC	0x04
44#define	IFA_F_HOMEADDRESS	0x10
45#define IFA_F_DEPRECATED	0x20
46#define IFA_F_TENTATIVE		0x40
47#define IFA_F_PERMANENT		0x80
48
49struct ifa_cacheinfo
50{
51	__u32	ifa_prefered;
52	__u32	ifa_valid;
53	__u32	cstamp; /* created timestamp, hundredths of seconds */
54	__u32	tstamp; /* updated timestamp, hundredths of seconds */
55};
56
57/* backwards compatibility for userspace */
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
61#endif
62