include/linux/if_addr.h

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