LXR iproute2/include/uapi/linux/if

   1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
   2#ifndef __LINUX_IF_ADDR_H
   3#define __LINUX_IF_ADDR_H
   4
   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_MAX,
  39};
  40
  41#define IFA_MAX (__IFA_MAX - 1)
  42
  43/* ifa_flags */
  44#define IFA_F_SECONDARY         0x01
  45#define IFA_F_TEMPORARY         IFA_F_SECONDARY
  46
  47#define IFA_F_NODAD             0x02
  48#define IFA_F_OPTIMISTIC        0x04
  49#define IFA_F_DADFAILED         0x08
  50#define IFA_F_HOMEADDRESS       0x10
  51#define IFA_F_DEPRECATED        0x20
  52#define IFA_F_TENTATIVE         0x40
  53#define IFA_F_PERMANENT         0x80
  54#define IFA_F_MANAGETEMPADDR    0x100
  55#define IFA_F_NOPREFIXROUTE     0x200
  56#define IFA_F_MCAUTOJOIN        0x400
  57#define IFA_F_STABLE_PRIVACY    0x800
  58
  59struct ifa_cacheinfo {
  60        __u32   ifa_prefered;
  61        __u32   ifa_valid;
  62        __u32   cstamp; /* created timestamp, hundredths of seconds */
  63        __u32   tstamp; /* updated timestamp, hundredths of seconds */
  64};
  65
  66/* backwards compatibility for userspace */
  67#define IFA_RTA(r)  ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct ifaddrmsg))))
  68#define IFA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct ifaddrmsg))
  69
  70#endif
  71