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diff --git a/src/vnet/bfd/bfd_protocol.h b/src/vnet/bfd/bfd_protocol.h
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+/*
+ * Copyright (c) 2011-2016 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#ifndef __included_bfd_protocol_h__
+#define __included_bfd_protocol_h__
+/**
+ * @file
+ * @brief BFD protocol declarations
+ */
+
+#include <vppinfra/types.h>
+#include <vppinfra/clib.h>
+
+/* *INDENT-OFF* */
+typedef CLIB_PACKED (struct {
+ /*
+ An optional Authentication Section MAY be present:
+
+ 0 1 2 3
+ 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ | Auth Type | Auth Len | Authentication Data... |
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ */
+ u8 type;
+ u8 len;
+ u8 data[0];
+}) bfd_auth_t;
+/* *INDENT-ON* */
+
+/* *INDENT-OFF* */
+typedef CLIB_PACKED (struct {
+ /*
+ The Mandatory Section of a BFD Control packet has the following
+ format:
+
+ 0 1 2 3
+ 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ |Vers | Diag |Sta|P|F|C|A|D|M| Detect Mult | Length |
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ | My Discriminator |
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ | Your Discriminator |
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ | Desired Min TX Interval |
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ | Required Min RX Interval |
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ | Required Min Echo RX Interval |
+ +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
+ */
+ struct
+ {
+ u8 vers_diag;
+ u8 sta_flags;
+ u8 detect_mult;
+ u8 length;
+ } head;
+ u32 my_disc;
+ u32 your_disc;
+ u32 des_min_tx;
+ u32 req_min_rx;
+ u32 req_min_echo_rx;
+}) bfd_pkt_t;
+/* *INDENT-ON* */
+
+/* *INDENT-OFF* */
+typedef CLIB_PACKED (struct {
+ bfd_pkt_t pkt;
+ bfd_auth_t auth;
+}) bfd_pkt_with_auth_t;
+/* *INDENT-ON* */
+
+u8 bfd_pkt_get_version (const bfd_pkt_t * pkt);
+void bfd_pkt_set_version (bfd_pkt_t * pkt, int version);
+u8 bfd_pkt_get_diag_code (const bfd_pkt_t * pkt);
+void bfd_pkt_set_diag_code (bfd_pkt_t * pkt, int value);
+u8 bfd_pkt_get_state (const bfd_pkt_t * pkt);
+void bfd_pkt_set_state (bfd_pkt_t * pkt, int value);
+u8 bfd_pkt_get_poll (const bfd_pkt_t * pkt);
+void bfd_pkt_set_final (bfd_pkt_t * pkt);
+u8 bfd_pkt_get_final (const bfd_pkt_t * pkt);
+void bfd_pkt_set_poll (bfd_pkt_t * pkt);
+u8 bfd_pkt_get_control_plane_independent (const bfd_pkt_t * pkt);
+void bfd_pkt_set_control_plane_independent (bfd_pkt_t * pkt);
+u8 bfd_pkt_get_auth_present (const bfd_pkt_t * pkt);
+void bfd_pkt_set_auth_present (bfd_pkt_t * pkt);
+u8 bfd_pkt_get_demand (const bfd_pkt_t * pkt);
+void bfd_pkt_set_demand (bfd_pkt_t * pkt);
+u8 bfd_pkt_get_multipoint (const bfd_pkt_t * pkt);
+void bfd_pkt_set_multipoint (bfd_pkt_t * pkt);
+
+/* BFD diagnostic codes */
+#define foreach_bfd_diag_code(F) \
+ F (0, no_diag, "No Diagnostic") \
+ F (1, det_time_exp, "Control Detection Time Expired") \
+ F (2, echo_failed, "Echo Function Failed") \
+ F (3, neighbor_sig_down, "Neighbor Signaled Session Down") \
+ F (4, fwd_plain_reset, "Forwarding Plane Reset") \
+ F (5, path_down, "Path Down") \
+ F (6, concat_path_down, "Concatenated Path Down") \
+ F (7, admin_down, "Administratively Down") \
+ F (8, reverse_concat_path_down, "Reverse Concatenated Path Down")
+
+#define BFD_DIAG_CODE_NAME(t) BFD_DIAG_CODE_##t
+
+typedef enum
+{
+#define F(n, t, s) BFD_DIAG_CODE_NAME (t) = n,
+ foreach_bfd_diag_code (F)
+#undef F
+} bfd_diag_code_e;
+
+const char *bfd_diag_code_string (bfd_diag_code_e diag);
+
+/* BFD state values */
+#define foreach_bfd_state(F) \
+ F (0, admin_down, "AdminDown") \
+ F (1, down, "Down") \
+ F (2, init, "Init") \
+ F (3, up, "Up")
+
+#define BFD_STATE_NAME(t) BFD_STATE_##t
+
+typedef enum
+{
+#define F(n, t, s) BFD_STATE_NAME (t) = n,
+ foreach_bfd_state (F)
+#undef F
+} bfd_state_e;
+
+const char *bfd_state_string (bfd_state_e state);
+
+#endif /* __included_bfd_protocol_h__ */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */