FreeBSD/Linux Kernel Cross Reference
sys/netlink/route/ifaddrs.h

     /*-
      * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
      *
      * Copyright (c) 2022 Alexander V. Chernikov <melifaro@FreeBSD.org>
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
      * are met:
      * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     */
    
    /*
     * Interface address-related (RTM_<NEW|DEL|GET>ADDR) message header and attributes.
     */
    
    #ifndef _NETLINK_ROUTE_IFADDRS_H_
    #define _NETLINK_ROUTE_IFADDRS_H_
    
    /* Base header for all of the relevant messages */
    struct ifaddrmsg {
            uint8_t         ifa_family;     /* Address family */
            uint8_t         ifa_prefixlen;  /* Prefix length */
            uint8_t         ifa_flags;      /* Address-specific flags */
            uint8_t         ifa_scope;      /* Address scope */
            uint32_t        ifa_index;      /* Link ifindex */
    };
    
    #ifndef _KERNEL
    #define _NL_IFA_HDRLEN          ((int)sizeof(struct ifaddrmsg))
    #define IFA_RTA(_ifa)           ((struct rtattr *)(NL_ITEM_DATA(_ifa, _NL_IFA_HDRLEN)))
    #define IFA_PAYLOAD(_hdr)       NLMSG_PAYLOAD(_hdr, _NL_IFA_HDRLEN)
    #endif
    
    /* Defined attributes */
    enum {
            IFA_UNSPEC,
            IFA_ADDRESS             = 1, /* binary, prefix address (destination for p2p) */
            IFA_LOCAL               = 2, /* binary, interface address */
            IFA_LABEL               = 3, /* string, interface name */
            IFA_BROADCAST           = 4, /* binary, broadcast ifa */
            IFA_ANYCAST             = 5, /* not supported */
            IFA_CACHEINFO           = 6, /* not supported */
            IFA_MULTICAST           = 7, /* not supported */
            IFA_FLAGS               = 8, /* not supported */
            IFA_RT_PRIORITY         = 9, /* not supported */
            IFA_TARGET_NETNSID      = 10, /* not supported */
            __IFA_MAX,
    };
    #define IFA_MAX (__IFA_MAX - 1)
    
    /* IFA_FLAGS attribute flags */
    #define IFA_F_SECONDARY         0x0001
    #define IFA_F_TEMPORARY         IFA_F_SECONDARY
    #define IFA_F_NODAD             0x0002
    #define IFA_F_OPTIMISTIC        0x0004
    #define IFA_F_DADFAILED         0x0008
    #define IFA_F_HOMEADDRESS       0x0010
    #define IFA_F_DEPRECATED        0x0020
    #define IFA_F_TENTATIVE         0x0040
    #define IFA_F_PERMANENT         0x0080
    #define IFA_F_MANAGETEMPADDR    0x0100
    #define IFA_F_NOPREFIXROUTE     0x0200
    #define IFA_F_MCAUTOJOIN        0x0400
    #define IFA_F_STABLE_PRIVACY    0x0800
    
    /* IFA_CACHEINFO value */
    struct ifa_cacheinfo {
            uint32_t ifa_prefered;
            uint32_t ifa_valid;
            uint32_t cstamp;
            uint32_t tstamp;
    };
    
    #endif

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