include/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 {
   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 enum
  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_HOMEADDRESS       0x10
  45 #define IFA_F_DEPRECATED        0x20
  46 #define IFA_F_TENTATIVE         0x40
  47 #define IFA_F_PERMANENT         0x80
  48
  49 struct ifa_cacheinfo
  50 {
  51         __u32   ifa_prefered;
  52         __u32   ifa_valid;
  53         __u32   cstamp; /* created timestamp, hundredths of seconds */
  54         __u32   tstamp; /* updated timestamp, hundredths of seconds */
  55 };
  56
  57 /* backwards compatibility for userspace */
  58 #ifndef __KERNEL__
  59 #define IFA_RTA(r)  ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct ifaddrmsg))))
  60 #define IFA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct ifaddrmsg))
  61 #endif
  62
  63 #endif