lib/ldp_sync.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * ldp_sync.c: LDP-SYNC handling routines
   4  * Copyright (C) 2020 Volta Networks, Inc.
   5  */
   6
   7 #include <zebra.h>
   8
   9 #include "command.h"
  10 #include "memory.h"
  11 #include "prefix.h"
  12 #include "log.h"
  13 #include "thread.h"
  14 #include "stream.h"
  15 #include "zclient.h"
  16 #include "table.h"
  17 #include "vty.h"
  18 #include "ldp_sync.h"
  19
  20 /* Library code */
  21 DEFINE_MTYPE_STATIC(LIB, LDP_SYNC_INFO, "LDP SYNC info");
  22
  23 /*
  24  * ldp_sync_info_create - Allocate the LDP_SYNC information
  25  */
  26 struct ldp_sync_info *ldp_sync_info_create(void)
  27 {
  28         struct ldp_sync_info *ldp_sync_info;
  29
  30         ldp_sync_info = XCALLOC(MTYPE_LDP_SYNC_INFO,
  31                                 sizeof(struct ldp_sync_info));
  32         assert(ldp_sync_info);
  33
  34         ldp_sync_info->flags = 0;
  35         ldp_sync_info->enabled = LDP_IGP_SYNC_DEFAULT;
  36         ldp_sync_info->state = LDP_IGP_SYNC_STATE_NOT_REQUIRED;
  37         ldp_sync_info->holddown = LDP_IGP_SYNC_HOLDDOWN_DEFAULT;
  38         ldp_sync_info->t_holddown = NULL;
  39         return ldp_sync_info;
  40 }
  41
  42 /*
  43  * ldp_sync_info_free - Free the LDP_SYNC information.
  44  */
  45 void ldp_sync_info_free(struct ldp_sync_info **ldp_sync_info)
  46 {
  47         if (*ldp_sync_info)
  48                 XFREE(MTYPE_LDP_SYNC_INFO, *ldp_sync_info);
  49 }
  50
  51 bool ldp_sync_if_is_enabled(struct ldp_sync_info *ldp_sync_info)
  52 {
  53         /* return true if LDP-SYNC is configured on this interface */
  54         if (ldp_sync_info &&
  55             ldp_sync_info->enabled == LDP_IGP_SYNC_ENABLED &&
  56             ldp_sync_info->state == LDP_IGP_SYNC_STATE_REQUIRED_NOT_UP)
  57                 return true;
  58
  59         return false;
  60 }
  61
  62 bool ldp_sync_if_down(struct ldp_sync_info *ldp_sync_info)
  63 {
  64         /* Stop LDP-SYNC on this interface:
  65          *   if holddown timer is running stop it
  66          *   update state
  67          */
  68         if (ldp_sync_info && ldp_sync_info->enabled == LDP_IGP_SYNC_ENABLED) {
  69                 THREAD_OFF(ldp_sync_info->t_holddown);
  70
  71                 if (ldp_sync_info->state == LDP_IGP_SYNC_STATE_REQUIRED_UP)
  72                         ldp_sync_info->state =
  73                                 LDP_IGP_SYNC_STATE_REQUIRED_NOT_UP;
  74                 return true;
  75         }
  76
  77         return false;
  78 }