LXR linux/include/linux/if

   1#ifndef __LINUX_IF_ADDR_H
   2#define __LINUX_IF_ADDR_H
   3
   4#include <linux/types.h>
   5#include <linux/netlink.h>
   6
   7struct ifaddrmsg
   8{
   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 */
  23enum
  24{
  25        IFA_UNSPEC,
  26        IFA_ADDRESS,
  27        IFA_LOCAL,
  28        IFA_LABEL,
  29        IFA_BROADCAST,
  30        IFA_ANYCAST,
  31        IFA_CACHEINFO,
  32        IFA_MULTICAST,
  33        __IFA_MAX,
  34};
  35
  36#define IFA_MAX (__IFA_MAX - 1)
  37
  38/* ifa_flags */
  39#define IFA_F_SECONDARY         0x01
  40#define IFA_F_TEMPORARY         IFA_F_SECONDARY
  41
  42#define IFA_F_NODAD             0x02
  43#define IFA_F_OPTIMISTIC        0x04
  44#define IFA_F_DADFAILED         0x08
  45#define IFA_F_HOMEADDRESS       0x10
  46#define IFA_F_DEPRECATED        0x20
  47#define IFA_F_TENTATIVE         0x40
  48#define IFA_F_PERMANENT         0x80
  49
  50struct ifa_cacheinfo
  51{
  52        __u32   ifa_prefered;
  53        __u32   ifa_valid;
  54        __u32   cstamp; /* created timestamp, hundredths of seconds */
  55        __u32   tstamp; /* updated timestamp, hundredths of seconds */
  56};
  57
  58/* backwards compatibility for userspace */
  59#ifndef __KERNEL__
  60#define IFA_RTA(r)  ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct ifaddrmsg))))
  61#define IFA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct ifaddrmsg))
  62#endif
  63
  64#endif
  65