sharpd/sharp_nht.c

   1 /*
   2  * SHARP - code to track nexthops
   3  * Copyright (C) Cumulus Networks, Inc.
   4  *               Donald Sharp
   5  *
   6  * This file is part of FRR.
   7  *
   8  * FRR is free software; you can redistribute it and/or modify it
   9  * under the terms of the GNU General Public License as published by the
  10  * Free Software Foundation; either version 2, or (at your option) any
  11  * later version.
  12  *
  13  * FRR is distributed in the hope that it will be useful, but
  14  * WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License along
  19  * with this program; see the file COPYING; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
  21  */
  22 #include <zebra.h>
  23
  24 #include "memory.h"
  25 #include "nexthop.h"
  26 #include "nexthop_group.h"
  27 #include "vty.h"
  28
  29 #include "sharp_nht.h"
  30 #include "sharp_globals.h"
  31
  32 DEFINE_MTYPE_STATIC(SHARPD, NH_TRACKER, "Nexthop Tracker")
  33
  34 struct sharp_nh_tracker *sharp_nh_tracker_get(struct prefix *p)
  35 {
  36         struct listnode *node;
  37         struct sharp_nh_tracker *nht;
  38
  39         for (ALL_LIST_ELEMENTS_RO(sg.nhs, node, nht)) {
  40                 if (prefix_same(&nht->p, p))
  41                         break;
  42         }
  43
  44         if (nht)
  45                 return nht;
  46
  47         nht = XCALLOC(MTYPE_NH_TRACKER, sizeof(*nht));
  48         prefix_copy(&nht->p, p);
  49
  50         listnode_add(sg.nhs, nht);
  51         return nht;
  52 }
  53
  54 void sharp_nh_tracker_dump(struct vty *vty)
  55 {
  56         struct listnode *node;
  57         struct sharp_nh_tracker *nht;
  58
  59         for (ALL_LIST_ELEMENTS_RO(sg.nhs, node, nht)) {
  60                 char buf[PREFIX_STRLEN];
  61
  62                 vty_out(vty, "%s: Nexthops: %u Updates: %u\n",
  63                         prefix2str(&nht->p, buf, sizeof(buf)),
  64                         nht->nhop_num,
  65                         nht->updates);
  66         }
  67 }