linux/include/uapi/linux/if_addr.h

/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
#ifndef __LINUX_IF_ADDR_H
#define __LINUX_IF_ADDR_H

#include <linux/types.h>
#include <linux/netlink.h>

struct ifaddrmsg { … };

/*
 * 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 { … };

#define IFA_MAX …

/* ifa_flags */
#define IFA_F_SECONDARY …
#define IFA_F_TEMPORARY …

#define IFA_F_NODAD …
#define IFA_F_OPTIMISTIC …
#define IFA_F_DADFAILED …
#define IFA_F_HOMEADDRESS …
#define IFA_F_DEPRECATED …
#define IFA_F_TENTATIVE …
#define IFA_F_PERMANENT …
#define IFA_F_MANAGETEMPADDR …
#define IFA_F_NOPREFIXROUTE …
#define IFA_F_MCAUTOJOIN …
#define IFA_F_STABLE_PRIVACY …

struct ifa_cacheinfo { … };

/* backwards compatibility for userspace */
#ifndef __KERNEL__
#define IFA_RTA …
#define IFA_PAYLOAD …
#endif

/* ifa_proto */
#define IFAPROT_UNSPEC …
#define IFAPROT_KERNEL_LO …
#define IFAPROT_KERNEL_RA …
#define IFAPROT_KERNEL_LL …

#endif