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1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */2#ifndef __LINUX_IF_ADDR_H3#define __LINUX_IF_ADDR_H4 5#include <linux/types.h>6#include <linux/netlink.h>7 8struct ifaddrmsg {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 *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.25 */26enum {27 IFA_UNSPEC,28 IFA_ADDRESS,29 IFA_LOCAL,30 IFA_LABEL,31 IFA_BROADCAST,32 IFA_ANYCAST,33 IFA_CACHEINFO,34 IFA_MULTICAST,35 IFA_FLAGS,36 IFA_RT_PRIORITY, /* u32, priority/metric for prefix route */37 IFA_TARGET_NETNSID,38 IFA_PROTO, /* u8, address protocol */39 __IFA_MAX,40};41 42#define IFA_MAX (__IFA_MAX - 1)43 44/* ifa_flags */45#define IFA_F_SECONDARY 0x0146#define IFA_F_TEMPORARY IFA_F_SECONDARY47 48#define IFA_F_NODAD 0x0249#define IFA_F_OPTIMISTIC 0x0450#define IFA_F_DADFAILED 0x0851#define IFA_F_HOMEADDRESS 0x1052#define IFA_F_DEPRECATED 0x2053#define IFA_F_TENTATIVE 0x4054#define IFA_F_PERMANENT 0x8055#define IFA_F_MANAGETEMPADDR 0x10056#define IFA_F_NOPREFIXROUTE 0x20057#define IFA_F_MCAUTOJOIN 0x40058#define IFA_F_STABLE_PRIVACY 0x80059 60struct ifa_cacheinfo {61 __u32 ifa_prefered;62 __u32 ifa_valid;63 __u32 cstamp; /* created timestamp, hundredths of seconds */64 __u32 tstamp; /* updated timestamp, hundredths of seconds */65};66 67/* backwards compatibility for userspace */68#ifndef __KERNEL__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))71#endif72 73/* ifa_proto */74#define IFAPROT_UNSPEC 075#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 */78 79#endif80