1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2 #ifndef __LINUX_IF_ADDR_H
3 #define __LINUX_IF_ADDR_H
5 #include <linux/types.h>
6 #include <linux/netlink.h>
10 __u8 ifa_prefixlen; /* The prefix length */
11 __u8 ifa_flags; /* Flags */
12 __u8 ifa_scope; /* Address scope */
13 __u32 ifa_index; /* Link index */
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.
23 * IFA_FLAGS is a u32 attribute that extends the u8 field ifa_flags.
24 * If present, the value from struct ifaddrmsg will be ignored.
36 IFA_RT_PRIORITY, /* u32, priority/metric for prefix route */
38 IFA_PROTO, /* u8, address protocol */
42 #define IFA_MAX (__IFA_MAX - 1)
45 #define IFA_F_SECONDARY 0x01
46 #define IFA_F_TEMPORARY IFA_F_SECONDARY
48 #define IFA_F_NODAD 0x02
49 #define IFA_F_OPTIMISTIC 0x04
50 #define IFA_F_DADFAILED 0x08
51 #define IFA_F_HOMEADDRESS 0x10
52 #define IFA_F_DEPRECATED 0x20
53 #define IFA_F_TENTATIVE 0x40
54 #define IFA_F_PERMANENT 0x80
55 #define IFA_F_MANAGETEMPADDR 0x100
56 #define IFA_F_NOPREFIXROUTE 0x200
57 #define IFA_F_MCAUTOJOIN 0x400
58 #define IFA_F_STABLE_PRIVACY 0x800
60 struct ifa_cacheinfo {
63 __u32 cstamp; /* created timestamp, hundredths of seconds */
64 __u32 tstamp; /* updated timestamp, hundredths of seconds */
67 /* backwards compatibility for userspace */
69 #define IFA_RTA(r) ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct ifaddrmsg))))
70 #define IFA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct ifaddrmsg))
74 #define IFAPROT_UNSPEC 0
75 #define IFAPROT_KERNEL_LO 1 /* loopback */
76 #define IFAPROT_KERNEL_RA 2 /* set by kernel from router announcement */
77 #define IFAPROT_KERNEL_LL 3 /* link-local set by kernel */