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diff --git a/zebra/zebra_ptm.h b/zebra/zebra_ptm.h
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+/*
+ * Definitions for prescriptive topology module (PTM).
+ * Copyright (C) 1998, 99, 2000 Kunihiro Ishiguro, Toshiaki Takada
+ *
+ * This file is part of GNU Zebra.
+ *
+ * GNU Zebra 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, or (at your option) any
+ * later version.
+ *
+ * GNU Zebra 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 _ZEBRA_PTM_H
+#define _ZEBRA_PTM_H
+
+extern const char ZEBRA_PTM_SOCK_NAME[];
+#define ZEBRA_PTM_MAX_SOCKBUF 3200 /* 25B *128 ports */
+#define ZEBRA_PTM_SEND_MAX_SOCKBUF 512
+
+#define ZEBRA_PTM_BFD_CLIENT_FLAG_REG (1 << 1) /* client registered with BFD */
+
+#include "zebra/zserv.h"
+#include "zebra/interface.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Zebra ptm context block */
+struct zebra_ptm_cb {
+ int ptm_sock; /* ptm file descriptor. */
+
+ struct buffer *wb; /* Buffer of data waiting to be written to ptm. */
+
+ struct thread *t_read; /* Thread for read */
+ struct thread *t_write; /* Thread for write */
+ struct thread *t_timer; /* Thread for timer */
+
+ char *out_data;
+ char *in_data;
+ int reconnect_time;
+
+ int ptm_enable;
+ int pid;
+ uint8_t client_flags[ZEBRA_ROUTE_MAX];
+};
+
+#define ZEBRA_PTM_STATUS_DOWN 0
+#define ZEBRA_PTM_STATUS_UP 1
+#define ZEBRA_PTM_STATUS_UNKNOWN 2
+
+/* For interface ptm-enable configuration. */
+#define ZEBRA_IF_PTM_ENABLE_OFF 0
+#define ZEBRA_IF_PTM_ENABLE_ON 1
+#define ZEBRA_IF_PTM_ENABLE_UNSPEC 2
+
+#define IS_BFD_ENABLED_PROTOCOL(protocol) ( \
+ (protocol) == ZEBRA_ROUTE_BGP || \
+ (protocol) == ZEBRA_ROUTE_OSPF || \
+ (protocol) == ZEBRA_ROUTE_OSPF6 || \
+ (protocol) == ZEBRA_ROUTE_ISIS || \
+ (protocol) == ZEBRA_ROUTE_PIM || \
+ (protocol) == ZEBRA_ROUTE_OPENFABRIC \
+)
+
+void zebra_ptm_init(void);
+void zebra_ptm_finish(void);
+void zebra_ptm_connect(struct thread *t);
+void zebra_ptm_write(struct vty *vty);
+int zebra_ptm_get_enable_state(void);
+
+/* ZAPI message handlers */
+void zebra_ptm_bfd_dst_register(ZAPI_HANDLER_ARGS);
+void zebra_ptm_bfd_dst_deregister(ZAPI_HANDLER_ARGS);
+void zebra_ptm_bfd_client_register(ZAPI_HANDLER_ARGS);
+#if HAVE_BFDD > 0
+void zebra_ptm_bfd_dst_replay(ZAPI_HANDLER_ARGS);
+#endif /* HAVE_BFDD */
+
+void zebra_ptm_show_status(struct vty *vty, json_object *json,
+ struct interface *ifp);
+void zebra_ptm_if_init(struct zebra_if *zebra_ifp);
+void zebra_ptm_if_set_ptm_state(struct interface *ifp,
+ struct zebra_if *zebra_ifp);
+void zebra_ptm_if_write(struct vty *vty, struct zebra_if *zebra_ifp);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif