1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ 2 #ifndef __LINUX_IF_ADDR_H 3 #define __LINUX_IF_ADDR_H 4 5 #include <linux/types.h> 6 #include <linux/netlink.h> 7 8 struct ifaddrmsg { 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 * IFA_FLAGS is a u32 attribute that extends the u8 field ifa_flags. 24 * If present, the value from struct ifaddrmsg will be ignored. 25 */ 26 enum { 27 IFA_UNSPEC, 28 IFA_ADDRESS, 29 IFA_LOCAL, 30 IFA_LABEL, 31 IFA_BROADCAST, 32 IFA_ANYCAST, 33 IFA_CACHEINFO, 34 IFA_MULTICAST, 35 IFA_FLAGS, 36 __IFA_MAX, 37 }; 38 39 #define IFA_MAX (__IFA_MAX - 1) 40 41 /* ifa_flags */ 42 #define IFA_F_SECONDARY 0x01 43 #define IFA_F_TEMPORARY IFA_F_SECONDARY 44 45 #define IFA_F_NODAD 0x02 46 #define IFA_F_OPTIMISTIC 0x04 47 #define IFA_F_DADFAILED 0x08 48 #define IFA_F_HOMEADDRESS 0x10 49 #define IFA_F_DEPRECATED 0x20 50 #define IFA_F_TENTATIVE 0x40 51 #define IFA_F_PERMANENT 0x80 52 #define IFA_F_MANAGETEMPADDR 0x100 53 #define IFA_F_NOPREFIXROUTE 0x200 54 #define IFA_F_MCAUTOJOIN 0x400 55 #define IFA_F_STABLE_PRIVACY 0x800 56 57 struct ifa_cacheinfo { 58 __u32 ifa_prefered; 59 __u32 ifa_valid; 60 __u32 cstamp; /* created timestamp, hundredths of seconds */ 61 __u32 tstamp; /* updated timestamp, hundredths of seconds */ 62 }; 63 64 /* backwards compatibility for userspace */ 65 #define IFA_RTA(r) ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct ifaddrmsg)))) 66 #define IFA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct ifaddrmsg)) 67 68 #endif 69
