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 __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 *
22 * IFA_FLAGS is a u32 attribute that extends the u8 field ifa_flags.
23 * If present, the value from struct ifaddrmsg will be ignored.
24 */
25enum {
26 IFA_UNSPEC,
27 IFA_ADDRESS,
28 IFA_LOCAL,
29 IFA_LABEL,
30 IFA_BROADCAST,
31 IFA_ANYCAST,
32 IFA_CACHEINFO,
33 IFA_MULTICAST,
34 IFA_FLAGS,
35 __IFA_MAX,
36};
37
38#define IFA_MAX (__IFA_MAX - 1)
39
40/* ifa_flags */
41#define IFA_F_SECONDARY 0x01
42#define IFA_F_TEMPORARY IFA_F_SECONDARY
43
44#define IFA_F_NODAD 0x02
45#define IFA_F_OPTIMISTIC 0x04
46#define IFA_F_DADFAILED 0x08
47#define IFA_F_HOMEADDRESS 0x10
48#define IFA_F_DEPRECATED 0x20
49#define IFA_F_TENTATIVE 0x40
50#define IFA_F_PERMANENT 0x80
51#define IFA_F_MANAGETEMPADDR 0x100
52#define IFA_F_NOPREFIXROUTE 0x200
53#define IFA_F_MCAUTOJOIN 0x400
54#define IFA_F_STABLE_PRIVACY 0x800
55
56struct ifa_cacheinfo {
57 __u32 ifa_prefered;
58 __u32 ifa_valid;
59 __u32 cstamp; /* created timestamp, hundredths of seconds */
60 __u32 tstamp; /* updated timestamp, hundredths of seconds */
61};
62
63/* backwards compatibility for userspace */
64#define IFA_RTA(r) ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct ifaddrmsg))))
65#define IFA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct ifaddrmsg))
66
67#endif
68