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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>
/* auth type value, max key length, name, description */
#define foreach_bfd_auth_type(F) \
F (0, 0, reserved, "Reserved") \
F (1, 16, simple_password, "Simple Password") \
F (2, 16, keyed_md5, "Keyed MD5") \
F (3, 16, meticulous_keyed_md5, "Meticulous Keyed MD5") \
F (4, 20, keyed_sha1, "Keyed SHA1") \
F (5, 20, meticulous_keyed_sha1, "Meticulous Keyed SHA1")
#define BFD_AUTH_TYPE_NAME(t) BFD_AUTH_TYPE_##t
typedef enum
{
#define F(n, l, t, s) BFD_AUTH_TYPE_NAME (t) = n,
foreach_bfd_auth_type (F)
#undef F
} bfd_auth_type_e;
/**
* @brief get the maximum length of key data for given auth type
*/
u32 bfd_max_key_len_for_auth_type (bfd_auth_type_e auth_type);
const char *bfd_auth_type_str (bfd_auth_type_e auth_type);
typedef CLIB_PACKED (struct {
u8 type;
u8 len;
}) bfd_auth_common_t;
typedef CLIB_PACKED (struct {
/*
* 4.4. Keyed SHA1 and Meticulous Keyed SHA1 Authentication Section Format
* If the Authentication Present (A) bit is set in the header, and the
* Authentication Type field contains 4 (Keyed SHA1) or 5 (Meticulous
* Keyed SHA1), the Authentication Section 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
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Auth Type | Auth Len | Auth Key ID | Reserved |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Sequence Number |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | Auth Key/Hash... |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
* | ... |
* +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
*/
bfd_auth_common_t type_len;
u8 key_id;
u8 reserved;
u32 seq_num;
/*
* Auth Key/Hash
* This field carries the 20-byte SHA1 hash for the packet. When the
* hash is calculated, the shared SHA1 key is stored in this field,
* padded to a length of 20 bytes with trailing zero bytes if needed.
* The shared key MUST be encoded and configured to section 6.7.4.
*/
u8 hash[20];
}) bfd_auth_sha1_t;
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;
typedef CLIB_PACKED (struct {
bfd_pkt_t pkt;
bfd_auth_common_t common_auth;
}) bfd_pkt_with_common_auth_t;
typedef CLIB_PACKED (struct {
bfd_pkt_t pkt;
bfd_auth_sha1_t sha1_auth;
}) bfd_pkt_with_sha1_auth_t;
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:
*/
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