/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
#ifndef _UAPI__LINUX_IF_ADDR_H
#define _UAPI__LINUX_IF_ADDR_H
#include <linux/types.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 .
*
* IFA_FLAGS is a u32 attribute that extends the u8 field ifa_flags .
* If present , the value from struct ifaddrmsg will be ignored .
*/
enum {
IFA_UNSPEC,
IFA_ADDRESS,
IFA_LOCAL,
IFA_LABEL,
IFA_BROADCAST,
IFA_ANYCAST,
IFA_CACHEINFO,
IFA_MULTICAST,
IFA_FLAGS,
IFA_RT_PRIORITY, /* u32, priority/metric for prefix route */
IFA_TARGET_NETNSID,
IFA_PROTO, /* u8, address protocol */
__IFA_MAX,
};
#define IFA_MAX (__IFA_MAX - 1 )
/* ifa_flags */
#define IFA_F_SECONDARY 0 x01
#define IFA_F_TEMPORARY IFA_F_SECONDARY
#define IFA_F_NODAD 0 x02
#define IFA_F_OPTIMISTIC 0 x04
#define IFA_F_DADFAILED 0 x08
#define IFA_F_HOMEADDRESS 0 x10
#define IFA_F_DEPRECATED 0 x20
#define IFA_F_TENTATIVE 0 x40
#define IFA_F_PERMANENT 0 x80
#define IFA_F_MANAGETEMPADDR 0 x100
#define IFA_F_NOPREFIXROUTE 0 x200
#define IFA_F_MCAUTOJOIN 0 x400
#define IFA_F_STABLE_PRIVACY 0 x800
struct ifa_cacheinfo {
__u32 ifa_prefered;
__u32 ifa_valid;
__u32 cstamp; /* created timestamp, hundredths of seconds */
__u32 tstamp; /* updated timestamp, hundredths of seconds */
};
/* backwards compatibility for userspace */
#ifndef __KERNEL__
#define IFA_RTA(r) ((struct rtattr*)(((char *)(r)) + NLMSG_ALIGN(sizeof (struct ifaddrmsg))))
#define IFA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof (struct ifaddrmsg))
#endif
/* ifa_proto */
#define IFAPROT_UNSPEC 0
#define IFAPROT_KERNEL_LO 1 /* loopback */
#define IFAPROT_KERNEL_RA 2 /* set by kernel from router announcement */
#define IFAPROT_KERNEL_LL 3 /* link-local set by kernel */
#endif
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(vorverarbeitet am 2026-09-28)
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