ripngd/ripng_nexthop.h

   1 /* RIPng nexthop support
   2  * Copyright (C) 6WIND Vincent Jardin <vincent.jardin@6wind.com>
   3  *
   4  * This file is part of GNU Zebra.
   5  *
   6  * GNU Zebra is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License as published by the
   8  * Free Software Foundation; either version 2, or (at your option) any
   9  * later version.
  10  *
  11  * GNU Zebra is distributed in the hope that it will be useful, but
  12  * WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License along
  17  * with this program; see the file COPYING; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  19  */
  20
  21 #ifndef _ZEBRA_RIPNG_RIPNG_NEXTHOP_H
  22 #define _ZEBRA_RIPNG_RIPNG_NEXTHOP_H
  23
  24 #include <zebra.h>
  25 #include "linklist.h"
  26 #include "ripngd/ripng_route.h"
  27 #include "ripngd/ripngd.h"
  28
  29 extern struct list *ripng_rte_new(void);
  30 extern void ripng_rte_free(struct list *ripng_rte_list);
  31 extern void ripng_rte_add(struct list *ripng_rte_list, struct prefix_ipv6 *p,
  32                           struct ripng_info *rinfo,
  33                           struct ripng_aggregate *aggregate);
  34 extern void ripng_rte_send(struct list *ripng_rte_list, struct interface *ifp,
  35                            struct sockaddr_in6 *to);
  36
  37 /***
  38  * 1 if A > B
  39  * 0 if A = B
  40  * -1 if A < B
  41  **/
  42 static inline int addr6_cmp(struct in6_addr *A, struct in6_addr *B)
  43 {
  44 #define a(i) A->s6_addr32[i]
  45 #define b(i) B->s6_addr32[i]
  46
  47         if (a(3) > b(3))
  48                 return 1;
  49         else if ((a(3) == b(3)) && (a(2) > b(2)))
  50                 return 1;
  51         else if ((a(3) == b(3)) && (a(2) == b(2)) && (a(1) > b(1)))
  52                 return 1;
  53         else if ((a(3) == b(3)) && (a(2) == b(2)) && (a(1) == b(1))
  54                  && (a(0) > b(0)))
  55                 return 1;
  56
  57         if ((a(3) == b(3)) && (a(2) == b(2)) && (a(1) == b(1))
  58             && (a(0) == b(0)))
  59                 return 0;
  60
  61         return -1;
  62 }
  63
  64 #endif /* _ZEBRA_RIPNG_RIPNG_NEXTHOP_H */