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Sources/ucode/include/linux/if_addr.h

  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 

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