include/uapi/linux/if_addr.h

   1 #ifndef __LINUX_IF_ADDR_H
   2 #define __LINUX_IF_ADDR_H
   3
   4 #include <linux/types.h>
   5 #include <linux/netlink.h>
   6
   7 struct ifaddrmsg {
   8         __u8            ifa_family;
   9         __u8            ifa_prefixlen;  /* The prefix length            */
  10         __u8            ifa_flags;      /* Flags                        */
  11         __u8            ifa_scope;      /* Address scope                */
  12         __u32           ifa_index;      /* Link index                   */
  13 };
  14
  15 /*
  16  * Important comment:
  17  * IFA_ADDRESS is prefix address, rather than local interface address.
  18  * It makes no difference for normally configured broadcast interfaces,
  19  * but for point-to-point IFA_ADDRESS is DESTINATION address,
  20  * local address is supplied in IFA_LOCAL attribute.
  21  *
  22  * IFA_FLAGS is a u32 attribute that extends the u8 field ifa_flags.
  23  * If present, the value from struct ifaddrmsg will be ignored.
  24  */
  25 enum {
  26         IFA_UNSPEC,
  27         IFA_ADDRESS,
  28         IFA_LOCAL,
  29         IFA_LABEL,
  30         IFA_BROADCAST,
  31         IFA_ANYCAST,
  32         IFA_CACHEINFO,
  33         IFA_MULTICAST,
  34         IFA_FLAGS,
  35         __IFA_MAX,
  36 };
  37
  38 #define IFA_MAX (__IFA_MAX - 1)
  39
  40 /* ifa_flags */
  41 #define IFA_F_SECONDARY         0x01
  42 #define IFA_F_TEMPORARY         IFA_F_SECONDARY
  43
  44 #define IFA_F_NODAD             0x02
  45 #define IFA_F_OPTIMISTIC        0x04
  46 #define IFA_F_DADFAILED         0x08
  47 #define IFA_F_HOMEADDRESS       0x10
  48 #define IFA_F_DEPRECATED        0x20
  49 #define IFA_F_TENTATIVE         0x40
  50 #define IFA_F_PERMANENT         0x80
  51 #define IFA_F_MANAGETEMPADDR    0x100
  52 #define IFA_F_NOPREFIXROUTE     0x200
  53
  54 struct ifa_cacheinfo {
  55         __u32   ifa_prefered;
  56         __u32   ifa_valid;
  57         __u32   cstamp; /* created timestamp, hundredths of seconds */
  58         __u32   tstamp; /* updated timestamp, hundredths of seconds */
  59 };
  60
  61 /* backwards compatibility for userspace */
  62 #ifndef __KERNEL__
  63 #define IFA_RTA(r)  ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct ifaddrmsg))))
  64 #define IFA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct ifaddrmsg))
  65 #endif
  66
  67 #endif