Klement Sekera | 0e3c0de | 2016-09-29 14:43:44 +0200 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2011-2016 Cisco and/or its affiliates. |
| 3 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 4 | * you may not use this file except in compliance with the License. |
| 5 | * You may obtain a copy of the License at: |
| 6 | * |
| 7 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 8 | * |
| 9 | * Unless required by applicable law or agreed to in writing, software |
| 10 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 11 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 12 | * See the License for the specific language governing permissions and |
| 13 | * limitations under the License. |
| 14 | */ |
| 15 | #ifndef __included_bfd_protocol_h__ |
| 16 | #define __included_bfd_protocol_h__ |
| 17 | /** |
| 18 | * @file |
| 19 | * @brief BFD protocol declarations |
| 20 | */ |
| 21 | |
| 22 | #include <vppinfra/types.h> |
| 23 | #include <vppinfra/clib.h> |
| 24 | |
| 25 | /* *INDENT-OFF* */ |
| 26 | typedef CLIB_PACKED (struct { |
| 27 | /* |
| 28 | An optional Authentication Section MAY be present: |
| 29 | |
| 30 | 0 1 2 3 |
| 31 | 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 |
| 32 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 33 | | Auth Type | Auth Len | Authentication Data... | |
| 34 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 35 | */ |
| 36 | u8 type; |
| 37 | u8 len; |
| 38 | u8 data[0]; |
| 39 | }) bfd_auth_t; |
| 40 | /* *INDENT-ON* */ |
| 41 | |
| 42 | /* *INDENT-OFF* */ |
| 43 | typedef CLIB_PACKED (struct { |
| 44 | /* |
| 45 | The Mandatory Section of a BFD Control packet has the following |
| 46 | format: |
| 47 | |
| 48 | 0 1 2 3 |
| 49 | 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 |
| 50 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 51 | |Vers | Diag |Sta|P|F|C|A|D|M| Detect Mult | Length | |
| 52 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 53 | | My Discriminator | |
| 54 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 55 | | Your Discriminator | |
| 56 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 57 | | Desired Min TX Interval | |
| 58 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 59 | | Required Min RX Interval | |
| 60 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 61 | | Required Min Echo RX Interval | |
| 62 | +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+ |
| 63 | */ |
| 64 | struct |
| 65 | { |
| 66 | u8 vers_diag; |
| 67 | u8 sta_flags; |
| 68 | u8 detect_mult; |
| 69 | u8 length; |
| 70 | } head; |
| 71 | u32 my_disc; |
| 72 | u32 your_disc; |
| 73 | u32 des_min_tx; |
| 74 | u32 req_min_rx; |
| 75 | u32 req_min_echo_rx; |
| 76 | }) bfd_pkt_t; |
| 77 | /* *INDENT-ON* */ |
| 78 | |
| 79 | /* *INDENT-OFF* */ |
| 80 | typedef CLIB_PACKED (struct { |
| 81 | bfd_pkt_t pkt; |
| 82 | bfd_auth_t auth; |
| 83 | }) bfd_pkt_with_auth_t; |
| 84 | /* *INDENT-ON* */ |
| 85 | |
| 86 | u8 bfd_pkt_get_version (const bfd_pkt_t * pkt); |
| 87 | void bfd_pkt_set_version (bfd_pkt_t * pkt, int version); |
| 88 | u8 bfd_pkt_get_diag_code (const bfd_pkt_t * pkt); |
| 89 | void bfd_pkt_set_diag_code (bfd_pkt_t * pkt, int value); |
| 90 | u8 bfd_pkt_get_state (const bfd_pkt_t * pkt); |
| 91 | void bfd_pkt_set_state (bfd_pkt_t * pkt, int value); |
| 92 | u8 bfd_pkt_get_poll (const bfd_pkt_t * pkt); |
| 93 | void bfd_pkt_set_final (bfd_pkt_t * pkt); |
| 94 | u8 bfd_pkt_get_final (const bfd_pkt_t * pkt); |
| 95 | void bfd_pkt_set_poll (bfd_pkt_t * pkt); |
| 96 | u8 bfd_pkt_get_control_plane_independent (const bfd_pkt_t * pkt); |
| 97 | void bfd_pkt_set_control_plane_independent (bfd_pkt_t * pkt); |
| 98 | u8 bfd_pkt_get_auth_present (const bfd_pkt_t * pkt); |
| 99 | void bfd_pkt_set_auth_present (bfd_pkt_t * pkt); |
| 100 | u8 bfd_pkt_get_demand (const bfd_pkt_t * pkt); |
| 101 | void bfd_pkt_set_demand (bfd_pkt_t * pkt); |
| 102 | u8 bfd_pkt_get_multipoint (const bfd_pkt_t * pkt); |
| 103 | void bfd_pkt_set_multipoint (bfd_pkt_t * pkt); |
| 104 | |
| 105 | /* BFD diagnostic codes */ |
| 106 | #define foreach_bfd_diag_code(F) \ |
| 107 | F (0, no_diag, "No Diagnostic") \ |
| 108 | F (1, det_time_exp, "Control Detection Time Expired") \ |
| 109 | F (2, echo_failed, "Echo Function Failed") \ |
| 110 | F (3, neighbor_sig_down, "Neighbor Signaled Session Down") \ |
| 111 | F (4, fwd_plain_reset, "Forwarding Plane Reset") \ |
| 112 | F (5, path_down, "Path Down") \ |
| 113 | F (6, concat_path_down, "Concatenated Path Down") \ |
| 114 | F (7, admin_down, "Administratively Down") \ |
| 115 | F (8, reverse_concat_path_down, "Reverse Concatenated Path Down") |
| 116 | |
| 117 | #define BFD_DIAG_CODE_NAME(t) BFD_DIAG_CODE_##t |
| 118 | |
| 119 | typedef enum |
| 120 | { |
| 121 | #define F(n, t, s) BFD_DIAG_CODE_NAME (t) = n, |
| 122 | foreach_bfd_diag_code (F) |
| 123 | #undef F |
| 124 | } bfd_diag_code_e; |
| 125 | |
| 126 | const char *bfd_diag_code_string (bfd_diag_code_e diag); |
| 127 | |
| 128 | /* BFD state values */ |
| 129 | #define foreach_bfd_state(F) \ |
| 130 | F (0, admin_down, "AdminDown") \ |
| 131 | F (1, down, "Down") \ |
| 132 | F (2, init, "Init") \ |
| 133 | F (3, up, "Up") |
| 134 | |
| 135 | #define BFD_STATE_NAME(t) BFD_STATE_##t |
| 136 | |
| 137 | typedef enum |
| 138 | { |
| 139 | #define F(n, t, s) BFD_STATE_NAME (t) = n, |
| 140 | foreach_bfd_state (F) |
| 141 | #undef F |
| 142 | } bfd_state_e; |
| 143 | |
| 144 | const char *bfd_state_string (bfd_state_e state); |
| 145 | |
| 146 | #endif /* __included_bfd_protocol_h__ */ |
| 147 | |
| 148 | /* |
| 149 | * fd.io coding-style-patch-verification: ON |
| 150 | * |
| 151 | * Local Variables: |
| 152 | * eval: (c-set-style "gnu") |
| 153 | * End: |
| 154 | */ |