| /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */ |
| #ifndef __LINUX_IF_ADDR_H |
| #define __LINUX_IF_ADDR_H |
| |
| #include <linux/types.h> |
| #include <linux/netlink.h> |
| |
| struct ifaddrmsg { |
| __u8 ifa_family; |
| __u8 ifa_prefixlen; /* The prefix length */ |
| __u8 ifa_flags; /* Flags */ |
| __u8 ifa_scope; /* Address scope */ |
| __u32 ifa_index; /* Link index */ |
| }; |
| |
| /* |
| * Important comment: |
| * IFA_ADDRESS is prefix address, rather than local interface address. |
| * It makes no difference for normally configured broadcast interfaces, |
| * but for point-to-point IFA_ADDRESS is DESTINATION address, |
| * local address is supplied in IFA_LOCAL attribute. |
| * |
| * IFA_FLAGS is a u32 attribute that extends the u8 field ifa_flags. |
| * If present, the value from struct ifaddrmsg will be ignored. |
| */ |
| enum { |
| IFA_UNSPEC, |
| IFA_ADDRESS, |
| IFA_LOCAL, |
| IFA_LABEL, |
| IFA_BROADCAST, |
| IFA_ANYCAST, |
| IFA_CACHEINFO, |
| IFA_MULTICAST, |
| IFA_FLAGS, |
| IFA_RT_PRIORITY, /* u32, priority/metric for prefix route */ |
| IFA_TARGET_NETNSID, |
| IFA_PROTO, /* u8, address protocol */ |
| __IFA_MAX, |
| }; |
| |
| #define IFA_MAX (__IFA_MAX - 1) |
| |
| /* ifa_flags */ |
| #define IFA_F_SECONDARY 0x01 |
| #define IFA_F_TEMPORARY IFA_F_SECONDARY |
| |
| #define IFA_F_NODAD 0x02 |
| #define IFA_F_OPTIMISTIC 0x04 |
| #define IFA_F_DADFAILED 0x08 |
| #define IFA_F_HOMEADDRESS 0x10 |
| #define IFA_F_DEPRECATED 0x20 |
| #define IFA_F_TENTATIVE 0x40 |
| #define IFA_F_PERMANENT 0x80 |
| #define IFA_F_MANAGETEMPADDR 0x100 |
| #define IFA_F_NOPREFIXROUTE 0x200 |
| #define IFA_F_MCAUTOJOIN 0x400 |
| #define IFA_F_STABLE_PRIVACY 0x800 |
| |
| struct ifa_cacheinfo { |
| __u32 ifa_prefered; |
| __u32 ifa_valid; |
| __u32 cstamp; /* created timestamp, hundredths of seconds */ |
| __u32 tstamp; /* updated timestamp, hundredths of seconds */ |
| }; |
| |
| /* backwards compatibility for userspace */ |
| #ifndef __KERNEL__ |
| #define IFA_RTA(r) ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct ifaddrmsg)))) |
| #define IFA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct ifaddrmsg)) |
| #endif |
| |
| /* ifa_proto */ |
| #define IFAPROT_UNSPEC 0 |
| #define IFAPROT_KERNEL_LO 1 /* loopback */ |
| #define IFAPROT_KERNEL_RA 2 /* set by kernel from router announcement */ |
| #define IFAPROT_KERNEL_LL 3 /* link-local set by kernel */ |
| |
| #endif |