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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:
*/