ripngd/ripng_nexthop.h

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /* RIPng nexthop support
   3  * Copyright (C) 6WIND Vincent Jardin <vincent.jardin@6wind.com>
   4  */
   5
   6 #ifndef _ZEBRA_RIPNG_RIPNG_NEXTHOP_H
   7 #define _ZEBRA_RIPNG_RIPNG_NEXTHOP_H
   8
   9 #include <zebra.h>
  10 #include "linklist.h"
  11 #include "ripngd/ripng_route.h"
  12 #include "ripngd/ripngd.h"
  13
  14 extern struct list *ripng_rte_new(void);
  15 extern void ripng_rte_free(struct list *ripng_rte_list);
  16 extern void ripng_rte_add(struct list *ripng_rte_list, struct prefix_ipv6 *p,
  17                           struct ripng_info *rinfo,
  18                           struct ripng_aggregate *aggregate);
  19 extern void ripng_rte_send(struct list *ripng_rte_list, struct interface *ifp,
  20                            struct sockaddr_in6 *to);
  21
  22 /***
  23  * 1 if A > B
  24  * 0 if A = B
  25  * -1 if A < B
  26  **/
  27 static inline int addr6_cmp(struct in6_addr *A, struct in6_addr *B)
  28 {
  29 #define a(i) A->s6_addr32[i]
  30 #define b(i) B->s6_addr32[i]
  31
  32         if (a(3) > b(3))
  33                 return 1;
  34         else if ((a(3) == b(3)) && (a(2) > b(2)))
  35                 return 1;
  36         else if ((a(3) == b(3)) && (a(2) == b(2)) && (a(1) > b(1)))
  37                 return 1;
  38         else if ((a(3) == b(3)) && (a(2) == b(2)) && (a(1) == b(1))
  39                  && (a(0) > b(0)))
  40                 return 1;
  41
  42         if ((a(3) == b(3)) && (a(2) == b(2)) && (a(1) == b(1))
  43             && (a(0) == b(0)))
  44                 return 0;
  45
  46         return -1;
  47 }
  48
  49 #endif /* _ZEBRA_RIPNG_RIPNG_NEXTHOP_H */