staticd/static_vrf.c

   1 /*
   2  * STATICd - vrf code
   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 "vrf.h"
  23 #include "nexthop.h"
  24 #include "table.h"
  25 #include "srcdest_table.h"
  26
  27 #include "static_memory.h"
  28 #include "static_vrf.h"
  29 #include "static_routes.h"
  30 #include "static_zebra.h"
  31 #include "static_vty.h"
  32
  33 static void zebra_stable_node_cleanup(struct route_table *table,
  34                                       struct route_node *node)
  35 {
  36         struct static_route *si, *next;
  37
  38         if (node->info)
  39                 for (si = node->info; si; si = next) {
  40                         next = si->next;
  41                         XFREE(MTYPE_STATIC_ROUTE, si);
  42                 }
  43 }
  44
  45 static struct static_vrf *static_vrf_alloc(void)
  46 {
  47         struct route_table *table;
  48         struct static_vrf *svrf;
  49         safi_t safi;
  50         afi_t afi;
  51
  52         svrf = XCALLOC(MTYPE_TMP, sizeof(struct static_vrf));
  53
  54         for (afi = AFI_IP; afi <= AFI_IP6; afi++) {
  55                 for (safi = SAFI_UNICAST; safi <= SAFI_MULTICAST; safi++) {
  56                         if (afi == AFI_IP6)
  57                                 table = srcdest_table_init();
  58                         else
  59                                 table = route_table_init();
  60                         table->cleanup = zebra_stable_node_cleanup;
  61                         svrf->stable[afi][safi] = table;
  62                 }
  63         }
  64         return svrf;
  65 }
  66
  67 static int static_vrf_new(struct vrf *vrf)
  68 {
  69         struct static_vrf *svrf;
  70
  71         svrf = static_vrf_alloc();
  72         vrf->info = svrf;
  73         svrf->vrf = vrf;
  74
  75         return 0;
  76 }
  77
  78 static int static_vrf_enable(struct vrf *vrf)
  79 {
  80         static_zebra_vrf_register(vrf);
  81
  82         static_fixup_vrf_ids(vrf->info);
  83
  84         /*
  85          * We may have static routes that are now possible to
  86          * insert into the appropriate tables
  87          */
  88         static_config_install_delayed_routes(vrf->info);
  89
  90         return 0;
  91 }
  92
  93 static int static_vrf_disable(struct vrf *vrf)
  94 {
  95         static_zebra_vrf_unregister(vrf);
  96         return 0;
  97 }
  98
  99 static int static_vrf_delete(struct vrf *vrf)
 100 {
 101         struct route_table *table;
 102         struct static_vrf *svrf;
 103         safi_t safi;
 104         afi_t afi;
 105
 106         svrf = vrf->info;
 107         for (afi = AFI_IP; afi <= AFI_IP6; afi++) {
 108                 for (safi = SAFI_UNICAST; safi <= SAFI_MULTICAST; safi++) {
 109                         table = svrf->stable[afi][safi];
 110                         route_table_finish(table);
 111                         svrf->stable[afi][safi] = NULL;
 112                 }
 113         }
 114         return 0;
 115 }
 116
 117 /* Lookup the static routing table in a VRF. */
 118 struct route_table *static_vrf_static_table(afi_t afi, safi_t safi,
 119                                             struct static_vrf *svrf)
 120 {
 121         if (!svrf)
 122                 return NULL;
 123
 124         if (afi >= AFI_MAX || safi >= SAFI_MAX)
 125                 return NULL;
 126
 127         return svrf->stable[afi][safi];
 128 }
 129
 130 struct static_vrf *static_vrf_lookup_by_id(vrf_id_t vrf_id)
 131 {
 132         struct vrf *vrf;
 133
 134         vrf = vrf_lookup_by_id(vrf_id);
 135         if (vrf)
 136                 return ((struct static_vrf *)vrf->info);
 137
 138         return NULL;
 139 }
 140
 141 struct static_vrf *static_vrf_lookup_by_name(const char *name)
 142 {
 143         struct vrf *vrf;
 144
 145         if (!name)
 146                 name = VRF_DEFAULT_NAME;
 147
 148         vrf = vrf_lookup_by_name(name);
 149         if (vrf)
 150                 return ((struct static_vrf *)vrf->info);
 151
 152         return NULL;
 153 }
 154
 155 static int static_vrf_config_write(struct vty *vty)
 156 {
 157         struct vrf *vrf;
 158
 159         RB_FOREACH (vrf, vrf_name_head, &vrfs_by_name) {
 160                 if (vrf->vrf_id != VRF_DEFAULT)
 161                         vty_frame(vty, "vrf %s\n", vrf->name);
 162
 163                 static_config(vty, vrf->info, AFI_IP,
 164                               SAFI_UNICAST, "ip route");
 165                 static_config(vty, vrf->info, AFI_IP,
 166                               SAFI_MULTICAST, "ip mroute");
 167                 static_config(vty, vrf->info, AFI_IP6,
 168                               SAFI_UNICAST, "ipv6 route");
 169
 170                 if (vrf->vrf_id != VRF_DEFAULT)
 171                         vty_endframe(vty, " exit-vrf\n!\n");
 172         }
 173
 174         return 0;
 175 }
 176
 177 int static_vrf_has_config(struct static_vrf *svrf)
 178 {
 179         struct route_table *table;
 180         safi_t safi;
 181         afi_t afi;
 182
 183         /*
 184          * NOTE: This is a don't care for the default VRF, but we go through
 185          * the motions to keep things consistent.
 186          */
 187         for (afi = AFI_IP; afi < AFI_MAX; afi++) {
 188                 for (safi = SAFI_UNICAST; safi < SAFI_MAX; safi++) {
 189                         table = svrf->stable[afi][safi];
 190                         if (!table)
 191                                 continue;
 192                         if (route_table_count(table))
 193                                 return 1;
 194                 }
 195         }
 196
 197         return 0;
 198 }
 199
 200 void static_vrf_init(void)
 201 {
 202         vrf_init(static_vrf_new, static_vrf_enable,
 203                  static_vrf_disable, static_vrf_delete, NULL);
 204
 205         vrf_cmd_init(static_vrf_config_write, &static_privs);
 206 }