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/net/route_var.h

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    1 /*-
    2  * Copyright (c) 2015-2016
    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/net/route_var.h 335250 2018-06-16 08:26:23Z ae $
   30  */
   31 
   32 #ifndef _NET_ROUTE_VAR_H_
   33 #define _NET_ROUTE_VAR_H_
   34 
   35 struct rib_head {
   36         struct radix_head       head;
   37         rn_matchaddr_f_t        *rnh_matchaddr; /* longest match for sockaddr */
   38         rn_addaddr_f_t          *rnh_addaddr;   /* add based on sockaddr*/
   39         rn_deladdr_f_t          *rnh_deladdr;   /* remove based on sockaddr */
   40         rn_lookup_f_t           *rnh_lookup;    /* exact match for sockaddr */
   41         rn_walktree_t           *rnh_walktree;  /* traverse tree */
   42         rn_walktree_from_t      *rnh_walktree_from; /* traverse tree below a */
   43         rn_close_t              *rnh_close;     /*do something when the last ref drops*/
   44         rt_gen_t                rnh_gen;        /* generation counter */
   45         int                     rnh_multipath;  /* multipath capable ? */
   46         struct radix_node       rnh_nodes[3];   /* empty tree for common case */
   47         struct rmlock           rib_lock;       /* config/data path lock */
   48         struct radix_mask_head  rmhead;         /* masks radix head */
   49 };
   50 
   51 #define RIB_RLOCK_TRACKER       struct rm_priotracker _rib_tracker
   52 #define RIB_LOCK_INIT(rh)       rm_init(&(rh)->rib_lock, "rib head lock")
   53 #define RIB_LOCK_DESTROY(rh)    rm_destroy(&(rh)->rib_lock)
   54 #define RIB_RLOCK(rh)           rm_rlock(&(rh)->rib_lock, &_rib_tracker)
   55 #define RIB_RUNLOCK(rh)         rm_runlock(&(rh)->rib_lock, &_rib_tracker)
   56 #define RIB_WLOCK(rh)           rm_wlock(&(rh)->rib_lock)
   57 #define RIB_WUNLOCK(rh)         rm_wunlock(&(rh)->rib_lock)
   58 #define RIB_LOCK_ASSERT(rh)     rm_assert(&(rh)->rib_lock, RA_LOCKED)
   59 #define RIB_WLOCK_ASSERT(rh)    rm_assert(&(rh)->rib_lock, RA_WLOCKED)
   60 
   61 struct rib_head *rt_tables_get_rnh(int fib, int family);
   62 
   63 /* rte<>nhop translation */
   64 static inline uint16_t
   65 fib_rte_to_nh_flags(int rt_flags)
   66 {
   67         uint16_t res;
   68 
   69         res = (rt_flags & RTF_REJECT) ? NHF_REJECT : 0;
   70         res |= (rt_flags & RTF_BLACKHOLE) ? NHF_BLACKHOLE : 0;
   71         res |= (rt_flags & (RTF_DYNAMIC|RTF_MODIFIED)) ? NHF_REDIRECT : 0;
   72         res |= (rt_flags & RTF_BROADCAST) ? NHF_BROADCAST : 0;
   73         res |= (rt_flags & RTF_GATEWAY) ? NHF_GATEWAY : 0;
   74 
   75         return (res);
   76 }
   77 
   78 
   79 #endif

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