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 #define IFA_F_MCAUTOJOIN 0x400 54 #define IFA_F_STABLE_PRIVACY 0x800 55 56 struct ifa_cacheinfo { 57 __u32 ifa_prefered; 58 __u32 ifa_valid; 59 __u32 cstamp; /* created timestamp, hundredths of seconds */ 60 __u32 tstamp; /* updated timestamp, hundredths of seconds */ 61 }; 62 63 /* backwards compatibility for userspace */ 64 #define IFA_RTA(r) ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct ifaddrmsg)))) 65 #define IFA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct ifaddrmsg)) 66 67 #endif 68
