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-rw-r--r--lib/ldp_sync.c91
1 files changed, 91 insertions, 0 deletions
diff --git a/lib/ldp_sync.c b/lib/ldp_sync.c
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--- /dev/null
+++ b/lib/ldp_sync.c
@@ -0,0 +1,91 @@
+/*
+ * ldp_sync.c: LDP-SYNC handling routines
+ * Copyright (C) 2020 Volta Networks, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the Free
+ * Software Foundation; either version 2 of the License, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; see the file COPYING; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
+ */
+
+#include <zebra.h>
+
+#include "command.h"
+#include "memory.h"
+#include "prefix.h"
+#include "log.h"
+#include "thread.h"
+#include "stream.h"
+#include "zclient.h"
+#include "table.h"
+#include "vty.h"
+#include "ldp_sync.h"
+
+/* Library code */
+DEFINE_MTYPE_STATIC(LIB, LDP_SYNC_INFO, "LDP SYNC info");
+
+/*
+ * ldp_sync_info_create - Allocate the LDP_SYNC information
+ */
+struct ldp_sync_info *ldp_sync_info_create(void)
+{
+ struct ldp_sync_info *ldp_sync_info;
+
+ ldp_sync_info = XCALLOC(MTYPE_LDP_SYNC_INFO,
+ sizeof(struct ldp_sync_info));
+ assert(ldp_sync_info);
+
+ ldp_sync_info->flags = 0;
+ ldp_sync_info->enabled = LDP_IGP_SYNC_DEFAULT;
+ ldp_sync_info->state = LDP_IGP_SYNC_STATE_NOT_REQUIRED;
+ ldp_sync_info->holddown = LDP_IGP_SYNC_HOLDDOWN_DEFAULT;
+ ldp_sync_info->t_holddown = NULL;
+ return ldp_sync_info;
+}
+
+/*
+ * ldp_sync_info_free - Free the LDP_SYNC information.
+ */
+void ldp_sync_info_free(struct ldp_sync_info **ldp_sync_info)
+{
+ if (*ldp_sync_info)
+ XFREE(MTYPE_LDP_SYNC_INFO, *ldp_sync_info);
+}
+
+bool ldp_sync_if_is_enabled(struct ldp_sync_info *ldp_sync_info)
+{
+ /* return true if LDP-SYNC is configured on this interface */
+ if (ldp_sync_info &&
+ ldp_sync_info->enabled == LDP_IGP_SYNC_ENABLED &&
+ ldp_sync_info->state == LDP_IGP_SYNC_STATE_REQUIRED_NOT_UP)
+ return true;
+
+ return false;
+}
+
+bool ldp_sync_if_down(struct ldp_sync_info *ldp_sync_info)
+{
+ /* Stop LDP-SYNC on this interface:
+ * if holddown timer is running stop it
+ * update state
+ */
+ if (ldp_sync_info && ldp_sync_info->enabled == LDP_IGP_SYNC_ENABLED) {
+ THREAD_OFF(ldp_sync_info->t_holddown);
+
+ if (ldp_sync_info->state == LDP_IGP_SYNC_STATE_REQUIRED_UP)
+ ldp_sync_info->state =
+ LDP_IGP_SYNC_STATE_REQUIRED_NOT_UP;
+ return true;
+ }
+
+ return false;
+}