lib/nexthop_group.c

   1 /*
   2  * Nexthop Group structure definition.
   3  * Copyright (C) 2018 Cumulus Networks, Inc.
   4  *                    Donald Sharp
   5  *
   6  * This program 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 Free
   8  * Software Foundation; either version 2 of the License, or (at your option)
   9  * any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful, but WITHOUT
  12  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  14  * 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 #include <zebra.h>
  21
  22 #include <nexthop.h>
  23 #include <nexthop_group.h>
  24
  25 /* Add nexthop to the end of a nexthop list.  */
  26 void nexthop_add(struct nexthop **target, struct nexthop *nexthop)
  27 {
  28         struct nexthop *last;
  29
  30         for (last = *target; last && last->next; last = last->next)
  31                 ;
  32         if (last)
  33                 last->next = nexthop;
  34         else
  35                 *target = nexthop;
  36         nexthop->prev = last;
  37 }
  38
  39 void copy_nexthops(struct nexthop **tnh, struct nexthop *nh,
  40                    struct nexthop *rparent)
  41 {
  42         struct nexthop *nexthop;
  43         struct nexthop *nh1;
  44
  45         for (nh1 = nh; nh1; nh1 = nh1->next) {
  46                 nexthop = nexthop_new();
  47                 nexthop->vrf_id = nh1->vrf_id;
  48                 nexthop->ifindex = nh1->ifindex;
  49                 nexthop->type = nh1->type;
  50                 nexthop->flags = nh1->flags;
  51                 memcpy(&nexthop->gate, &nh1->gate, sizeof(nh1->gate));
  52                 memcpy(&nexthop->src, &nh1->src, sizeof(nh1->src));
  53                 memcpy(&nexthop->rmap_src, &nh1->rmap_src,
  54                        sizeof(nh1->rmap_src));
  55                 nexthop->rparent = rparent;
  56                 if (nh1->nh_label)
  57                         nexthop_add_labels(nexthop, nh1->nh_label_type,
  58                                            nh1->nh_label->num_labels,
  59                                            &nh1->nh_label->label[0]);
  60                 nexthop_add(tnh, nexthop);
  61
  62                 if (CHECK_FLAG(nh1->flags, NEXTHOP_FLAG_RECURSIVE))
  63                         copy_nexthops(&nexthop->resolved, nh1->resolved,
  64                                       nexthop);
  65         }
  66 }