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_RT_PRIORITY, /* u32, priority/metric for prefix route */ |
37 | IFA_TARGET_NETNSID, |
38 | __IFA_MAX, |
39 | }; |
40 | |
41 | #define IFA_MAX (__IFA_MAX - 1) |
42 | |
43 | /* ifa_flags */ |
44 | #define IFA_F_SECONDARY 0x01 |
45 | #define IFA_F_TEMPORARY IFA_F_SECONDARY |
46 | |
47 | #define IFA_F_NODAD 0x02 |
48 | #define IFA_F_OPTIMISTIC 0x04 |
49 | #define IFA_F_DADFAILED 0x08 |
50 | #define IFA_F_HOMEADDRESS 0x10 |
51 | #define IFA_F_DEPRECATED 0x20 |
52 | #define IFA_F_TENTATIVE 0x40 |
53 | #define IFA_F_PERMANENT 0x80 |
54 | #define IFA_F_MANAGETEMPADDR 0x100 |
55 | #define IFA_F_NOPREFIXROUTE 0x200 |
56 | #define IFA_F_MCAUTOJOIN 0x400 |
57 | #define IFA_F_STABLE_PRIVACY 0x800 |
58 | |
59 | struct ifa_cacheinfo { |
60 | __u32 ifa_prefered; |
61 | __u32 ifa_valid; |
62 | __u32 cstamp; /* created timestamp, hundredths of seconds */ |
63 | __u32 tstamp; /* updated timestamp, hundredths of seconds */ |
64 | }; |
65 | |
66 | /* backwards compatibility for userspace */ |
67 | #define IFA_RTA(r) ((struct rtattr*)(((char*)(r)) + NLMSG_ALIGN(sizeof(struct ifaddrmsg)))) |
68 | #define IFA_PAYLOAD(n) NLMSG_PAYLOAD(n,sizeof(struct ifaddrmsg)) |
69 | |
70 | #endif |
71 | |