/* 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		0x01#define IFA_F_TEMPORARY		IFA_F_SECONDARY #define	IFA_F_NODAD		0x02#define IFA_F_OPTIMISTIC	0x04#define IFA_F_DADFAILED		0x08#define	IFA_F_HOMEADDRESS	0x10#define IFA_F_DEPRECATED	0x20#define IFA_F_TENTATIVE		0x40#define IFA_F_PERMANENT		0x80#define IFA_F_MANAGETEMPADDR	0x100#define IFA_F_NOPREFIXROUTE	0x200#define IFA_F_MCAUTOJOIN	0x400#define IFA_F_STABLE_PRIVACY	0x800 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