Line data    Source code

       1             : /*
       2             :  * ldp_sync.c: LDP-SYNC handling routines
       3             :  * Copyright (C) 2020 Volta Networks, Inc.
       4             :  *
       5             :  * This program is free software; you can redistribute it and/or modify it
       6             :  * under the terms of the GNU General Public License as published by the Free
       7             :  * Software Foundation; either version 2 of the License, or (at your option)
       8             :  * any later version.
       9             :  *
      10             :  * This program is distributed in the hope that it will be useful, but WITHOUT
      11             :  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
      12             :  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
      13             :  * more details.
      14             :  *
      15             :  * You should have received a copy of the GNU General Public License along
      16             :  * with this program; see the file COPYING; if not, write to the Free Software
      17             :  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
      18             :  */
      19             : 
      20             : #include <zebra.h>
      21             : 
      22             : #include "command.h"
      23             : #include "memory.h"
      24             : #include "prefix.h"
      25             : #include "log.h"
      26             : #include "thread.h"
      27             : #include "stream.h"
      28             : #include "zclient.h"
      29             : #include "table.h"
      30             : #include "vty.h"
      31             : #include "ldp_sync.h"
      32             : 
      33             : /* Library code */
      34          12 : DEFINE_MTYPE_STATIC(LIB, LDP_SYNC_INFO, "LDP SYNC info");
      35             : 
      36             : /*
      37             :  * ldp_sync_info_create - Allocate the LDP_SYNC information
      38             :  */
      39           0 : struct ldp_sync_info *ldp_sync_info_create(void)
      40             : {
      41           0 :         struct ldp_sync_info *ldp_sync_info;
      42             : 
      43           0 :         ldp_sync_info = XCALLOC(MTYPE_LDP_SYNC_INFO,
      44             :                                 sizeof(struct ldp_sync_info));
      45           0 :         assert(ldp_sync_info);
      46             : 
      47           0 :         ldp_sync_info->flags = 0;
      48           0 :         ldp_sync_info->enabled = LDP_IGP_SYNC_DEFAULT;
      49           0 :         ldp_sync_info->state = LDP_IGP_SYNC_STATE_NOT_REQUIRED;
      50           0 :         ldp_sync_info->holddown = LDP_IGP_SYNC_HOLDDOWN_DEFAULT;
      51           0 :         ldp_sync_info->t_holddown = NULL;
      52           0 :         return ldp_sync_info;
      53             : }
      54             : 
      55             : /*
      56             :  * ldp_sync_info_free - Free the LDP_SYNC information.
      57             :  */
      58           0 : void ldp_sync_info_free(struct ldp_sync_info **ldp_sync_info)
      59             : {
      60           0 :         if (*ldp_sync_info)
      61           0 :                 XFREE(MTYPE_LDP_SYNC_INFO, *ldp_sync_info);
      62           0 : }
      63             : 
      64           0 : bool ldp_sync_if_is_enabled(struct ldp_sync_info *ldp_sync_info)
      65             : {
      66             :         /* return true if LDP-SYNC is configured on this interface */
      67           0 :         if (ldp_sync_info &&
      68           0 :             ldp_sync_info->enabled == LDP_IGP_SYNC_ENABLED &&
      69             :             ldp_sync_info->state == LDP_IGP_SYNC_STATE_REQUIRED_NOT_UP)
      70           0 :                 return true;
      71             : 
      72             :         return false;
      73             : }
      74             : 
      75           0 : bool ldp_sync_if_down(struct ldp_sync_info *ldp_sync_info)
      76             : {
      77             :         /* Stop LDP-SYNC on this interface:
      78             :          *   if holddown timer is running stop it
      79             :          *   update state
      80             :          */
      81           0 :         if (ldp_sync_info && ldp_sync_info->enabled == LDP_IGP_SYNC_ENABLED) {
      82           0 :                 THREAD_OFF(ldp_sync_info->t_holddown);
      83             : 
      84           0 :                 if (ldp_sync_info->state == LDP_IGP_SYNC_STATE_REQUIRED_UP)
      85           0 :                         ldp_sync_info->state =
      86             :                                 LDP_IGP_SYNC_STATE_REQUIRED_NOT_UP;
      87           0 :                 return true;
      88             :         }
      89             : 
      90             :         return false;
      91             : }