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diff --git a/vrrpd/vrrp_ndisc.h b/vrrpd/vrrp_ndisc.h
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+/*
+ * VRRP Neighbor Discovery.
+ * Copyright (C) 2019 Cumulus Networks, Inc.
+ * Quentin Young
+ *
+ * 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
+ */
+#ifndef __VRRP_NDISC_H__
+#define __VRRP_NDISC_H__
+
+#include <netinet/icmp6.h>
+#include <netinet/in.h>
+#include <netinet/ip6.h>
+
+#include "vrrp.h"
+
+/*
+ * Initialize VRRP neighbor discovery.
+ */
+extern void vrrp_ndisc_init(void);
+
+/*
+ * Check whether VRRP Neighbor Discovery is initialized.
+ *
+ * Returns:
+ *    True if initialized, false otherwise
+ */
+extern bool vrrp_ndisc_is_init(void);
+
+/*
+ * Finish VRRP Neighbor Discovery.
+ */
+extern void vrrp_ndisc_fini(void);
+
+/*
+ * Send VRRP Neighbor Advertisement.
+ *
+ * ifp
+ *    Interface to transmit on
+ *
+ * ip
+ *    IPv6 address to send Neighbor Advertisement for
+ *
+ * Returns:
+ *    -1 on failure
+ *     0 otherwise
+ */
+extern int vrrp_ndisc_una_send(struct vrrp_router *r, struct ipaddr *ip);
+
+/*
+ * Send VRRP Neighbor Advertisements for all virtual IPs.
+ *
+ * r
+ *    Virtual Router to send NA's for
+ *
+ * Returns:
+ *    -1 on failure
+ *     0 otherwise
+ */
+extern int vrrp_ndisc_una_send_all(struct vrrp_router *r);
+
+#endif /* __VRRP_NDISC_H__ */