The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/netinet/in_fib.h

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    1 /*-
    2  * Copyright (c) 2015
    3  *      Alexander V. Chernikov <melifaro@FreeBSD.org>
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  * 3. Neither the name of the University nor the names of its contributors
   14  *    may be used to endorse or promote products derived from this software
   15  *    without specific prior written permission.
   16  *
   17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   27  * SUCH DAMAGE.
   28  *
   29  * $FreeBSD: releng/12.0/sys/netinet/in_fib.h 314436 2017-02-28 23:42:47Z imp $
   30  */
   31 
   32 #ifndef _NETINET_IN_FIB_H_
   33 #define _NETINET_IN_FIB_H_
   34 
   35 /* Basic nexthop info used for uRPF/mtu checks */
   36 struct nhop4_basic {
   37         struct ifnet    *nh_ifp;        /* Logical egress interface */
   38         uint16_t        nh_mtu;         /* nexthop mtu */
   39         uint16_t        nh_flags;       /* nhop flags */
   40         struct in_addr  nh_addr;        /* GW/DST IPv4 address */
   41 };
   42 
   43 /* Extended nexthop info used for control protocols */
   44 struct nhop4_extended {
   45         struct ifnet    *nh_ifp;        /* Logical egress interface */
   46         uint16_t        nh_mtu;         /* nexthop mtu */
   47         uint16_t        nh_flags;       /* nhop flags */
   48         uint8_t         spare[4];
   49         struct in_addr  nh_addr;        /* GW/DST IPv4 address */
   50         struct in_addr  nh_src;         /* default source IPv4 address */
   51         uint64_t        spare2[2];
   52 };
   53 
   54 int fib4_lookup_nh_basic(uint32_t fibnum, struct in_addr dst, uint32_t flags,
   55     uint32_t flowid, struct nhop4_basic *pnh4);
   56 int fib4_lookup_nh_ext(uint32_t fibnum, struct in_addr dst, uint32_t flags,
   57     uint32_t flowid, struct nhop4_extended *pnh4);
   58 void fib4_free_nh_ext(uint32_t fibnum, struct nhop4_extended *pnh4);
   59 
   60 #endif
   61 

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