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
  17  * along with GNU Zebra; see the file COPYING.  If not, write to the Free
  18  * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
  19  * 02111-1307, USA.
  20  */
  21
  22 #ifndef _ZEBRA_RIPNG_RIPNG_NEXTHOP_H
  23 #define _ZEBRA_RIPNG_RIPNG_NEXTHOP_H
  24
  25 #include <zebra.h>
  26 #include "linklist.h"
  27 #include "ripngd/ripng_route.h"
  28 #include "ripngd/ripngd.h"
  29
  30 extern struct list * ripng_rte_new(void);
  31 extern void ripng_rte_free(struct list *ripng_rte_list);
  32 extern void ripng_rte_add(struct list *ripng_rte_list, struct prefix_ipv6 *p,
  33                           struct ripng_info *rinfo,
  34                           struct ripng_aggregate *aggregate);
  35 extern void ripng_rte_send(struct list *ripng_rte_list, struct interface *ifp,
  36                            struct sockaddr_in6 *to);
  37
  38 /***
  39  * 1 if A > B
  40  * 0 if A = B
  41  * -1 if A < B
  42  **/
  43 static inline int
  44 addr6_cmp(struct in6_addr *A, struct in6_addr *B) {
  45
  46 #ifndef s6_addr32
  47 #if defined(SUNOS_5)
  48 /* Some SunOS define s6_addr32 only to kernel */
  49 #define s6_addr32 _S6_un._S6_u32
  50 #else
  51 #define s6_addr32 __u6_addr.__u6_addr32
  52 #endif /* SUNOS_5 */
  53 #endif /*s6_addr32*/
  54
  55 #define a(i) A->s6_addr32[i]
  56 #define b(i) B->s6_addr32[i]
  57
  58   if (a(3) > b(3))
  59     return 1;
  60   else if ((a(3) == b(3)) && (a(2) > b(2)))
  61     return 1;
  62   else if ((a(3) == b(3)) && (a(2) == b(2)) && (a(1) > b(1)))
  63     return 1;
  64   else if ((a(3) == b(3)) && (a(2) == b(2)) && (a(1) == b(1)) && (a(0) > b(0)))
  65     return 1;
  66
  67   if ((a(3) == b(3)) && (a(2) == b(2)) && (a(1) == b(1)) && (a(0) == b(0)))
  68     return 0;
  69
  70   return -1;
  71 }
  72
  73 #endif /* _ZEBRA_RIPNG_RIPNG_NEXTHOP_H */