Takahiro Suzuki | d7bf820 | 2020-12-17 20:21:59 +0900 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 2020-present Open Networking Foundation |
| 3 | |
| 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| 5 | * you may not use this file except in compliance with the License. |
| 6 | * You may obtain a copy of the License at |
| 7 | |
| 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| 9 | |
| 10 | * Unless required by applicable law or agreed to in writing, software |
| 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 13 | * See the License for the specific language governing permissions and |
| 14 | * limitations under the License. |
| 15 | */ |
| 16 | |
| 17 | package l2oam |
| 18 | |
| 19 | import ( |
| 20 | "encoding/binary" |
| 21 | "encoding/hex" |
| 22 | "fmt" |
| 23 | |
| 24 | |
| 25 | "github.com/google/gopacket" |
| 26 | "github.com/google/gopacket/layers" |
| 27 | ) |
| 28 | |
| 29 | // TOAMSetRequest is a structure for SET request of TOAM message |
| 30 | type TOAMSetRequest struct { |
| 31 | layers.BaseLayer |
| 32 | Opcode uint8 |
| 33 | Flags uint16 |
| 34 | OAMPDUCode uint8 |
| 35 | OUId []byte // Organizationally Unique Identifier: 2a:ea:15 (Tibit Communications) |
| 36 | TOMIOpcode uint8 |
| 37 | CTBranch uint8 |
| 38 | CTType uint16 |
| 39 | CTLength uint8 |
| 40 | CTInstance uint32 |
| 41 | OCBranch uint8 |
| 42 | OCType uint16 |
| 43 | OCLength uint8 |
| 44 | OCInstance uint32 |
| 45 | VcBranch uint8 |
| 46 | VcLeaf uint16 |
| 47 | VcLength uint8 |
| 48 | ECLength uint8 |
| 49 | ECValue []byte |
| 50 | ECList []ECValueSet |
| 51 | EndBranch uint8 |
| 52 | } |
| 53 | |
| 54 | // ECValueSet is a structure for Vc-EC object |
| 55 | type ECValueSet struct { |
| 56 | Length uint8 |
| 57 | Value []byte |
| 58 | } |
| 59 | |
| 60 | // String returns the string expression of TOAMSetRequest |
| 61 | func (d *TOAMSetRequest) String() string { |
| 62 | message := fmt.Sprintf("Opcode:%x, Flags:%x, OAMPDUCode:%x, OUId:%v", d.Opcode, d.Flags, d.OAMPDUCode, hex.EncodeToString(d.OUId)) |
| 63 | message = fmt.Sprintf("%s, TOMIOpcode:%x", message, d.TOMIOpcode) |
| 64 | message = fmt.Sprintf("%s, CTBranch:%x, CTType:%x, CTLength:%x, CTInstance:%x", message, d.CTBranch, d.CTType, d.CTLength, d.CTInstance) |
| 65 | message = fmt.Sprintf("%s, OCBranch:%x, OCType:%x, OCLength:%x, OCInstance:%x", message, d.OCBranch, d.OCType, d.OCLength, d.OCInstance) |
| 66 | message = fmt.Sprintf("%s, VcBranch:%x, VcLeaf:%x, VcLength:%x", message, d.VcBranch, d.VcLeaf, d.VcLength) |
| 67 | message = fmt.Sprintf("%s, ECLength:%x, ECValue:%v, EndBranch:%x", message, d.ECLength, hex.EncodeToString(d.ECValue), d.EndBranch) |
| 68 | return message |
| 69 | } |
| 70 | |
| 71 | // Len returns the length of TOAMSetRequest |
| 72 | func (d *TOAMSetRequest) Len() int { |
| 73 | if d.VcLength != 0x80 { |
| 74 | return 22 + int(d.CTLength) + int(d.OCLength) + int(d.VcLength) |
| 75 | } |
| 76 | return 22 + int(d.CTLength) + int(d.OCLength) |
| 77 | |
| 78 | } |
| 79 | |
| 80 | // LayerType returns the ethernet type of TOAMSetRequest |
| 81 | func (d *TOAMSetRequest) LayerType() gopacket.LayerType { return layers.LayerTypeEthernet } |
| 82 | |
| 83 | // SerializeTo serializes a data structure to byte arrays |
| 84 | func (d *TOAMSetRequest) SerializeTo(b gopacket.SerializeBuffer, opts gopacket.SerializeOptions) error { |
| 85 | plen := int(d.Len()) |
| 86 | data, err := b.PrependBytes(plen) |
| 87 | if err != nil { |
| 88 | return err |
| 89 | } |
| 90 | |
| 91 | i := 0 |
| 92 | data[i] = byte(d.Opcode) |
| 93 | i++ |
| 94 | binary.BigEndian.PutUint16(data[i:i+2], d.Flags) |
| 95 | i += 2 |
| 96 | data[i] = byte(d.OAMPDUCode) |
| 97 | i++ |
| 98 | copy(data[i:i+len(d.OUId)], d.OUId) |
| 99 | i += len(d.OUId) |
| 100 | data[i] = byte(d.TOMIOpcode) |
| 101 | i++ |
| 102 | data[i] = byte(d.CTBranch) |
| 103 | i++ |
| 104 | binary.BigEndian.PutUint16(data[i:i+2], d.CTType) |
| 105 | i += 2 |
| 106 | data[i] = byte(d.CTLength) |
| 107 | i++ |
| 108 | binary.BigEndian.PutUint32(data[i:i+4], d.CTInstance) |
| 109 | i += 4 |
| 110 | data[i] = byte(d.OCBranch) |
| 111 | i++ |
| 112 | binary.BigEndian.PutUint16(data[i:i+2], d.OCType) |
| 113 | i += 2 |
| 114 | data[i] = byte(d.OCLength) |
| 115 | i++ |
| 116 | binary.BigEndian.PutUint32(data[i:i+4], d.OCInstance) |
| 117 | i += 4 |
| 118 | data[i] = byte(d.VcBranch) |
| 119 | i++ |
| 120 | binary.BigEndian.PutUint16(data[i:i+2], d.VcLeaf) |
| 121 | i += 2 |
| 122 | data[i] = byte(d.VcLength) |
| 123 | i++ |
| 124 | if d.VcLength != 0x80 { |
| 125 | // EC |
| 126 | data[i] = byte(d.ECLength) |
| 127 | i++ |
| 128 | copy(data[i:i+int(d.ECLength)], d.ECValue) |
| 129 | i += int(d.ECLength) |
| 130 | } |
| 131 | if d.ECList != nil { |
| 132 | for _, ecSet := range d.ECList { |
| 133 | data[i] = byte(ecSet.Length) |
| 134 | i++ |
| 135 | copy(data[i:i+int(ecSet.Length)], ecSet.Value) |
| 136 | i += int(ecSet.Length) |
| 137 | } |
| 138 | } |
| 139 | |
| 140 | data[i] = byte(d.EndBranch) |
| 141 | |
| 142 | return nil |
| 143 | } |
| 144 | |
| 145 | // TOAMSetResponse is a structure for SET response of TOAM message |
| 146 | type TOAMSetResponse struct { |
| 147 | layers.BaseLayer |
| 148 | Opcode uint8 |
| 149 | Flags uint16 |
| 150 | OAMPDUCode uint8 |
| 151 | OUId []byte // Organizationally Unique Identifier: 2a:ea:15 (Tibit Communications) |
| 152 | TOMIOpcode uint8 |
| 153 | CTBranch uint8 |
| 154 | CTType uint16 |
| 155 | CTLength uint8 |
| 156 | CTInstance uint32 |
| 157 | OCBranch uint8 |
| 158 | OCType uint16 |
| 159 | OCLength uint8 |
| 160 | OCInstance uint32 |
| 161 | VcBranch uint8 |
| 162 | VcLeaf uint16 |
| 163 | VcTOMIResCode uint8 |
| 164 | EndBranch uint8 |
| 165 | } |
| 166 | |
| 167 | // String returns the string expression of TOAMSetResponse |
| 168 | func (d *TOAMSetResponse) String() string { |
| 169 | message := fmt.Sprintf("Opcode:%x, Flags:%x, OAMPDUCode:%x, OUId:%v", d.Opcode, d.Flags, d.OAMPDUCode, hex.EncodeToString(d.OUId)) |
| 170 | message = fmt.Sprintf("%s, TOMIOpcode:%x", message, d.TOMIOpcode) |
| 171 | message = fmt.Sprintf("%s, CTBranch:%x, CTType:%x, CTLength:%x, CTInstance:%x", message, d.CTBranch, d.CTType, d.CTLength, d.CTInstance) |
| 172 | message = fmt.Sprintf("%s, OCBranch:%x, OCType:%x, OCLength:%x, OCInstance:%x", message, d.OCBranch, d.OCType, d.OCLength, d.OCInstance) |
| 173 | message = fmt.Sprintf("%s, VcBranch:%x, VcLeaf:%x, VcTOMIResCode:%x, EndBranch:%x", message, d.VcBranch, d.VcLeaf, d.VcTOMIResCode, d.EndBranch) |
| 174 | return message |
| 175 | } |
| 176 | |
| 177 | // Len returns the length of TOAMSetResponse |
| 178 | func (d *TOAMSetResponse) Len() int { |
| 179 | return 34 + int(d.CTLength) + int(d.OCLength) |
| 180 | } |
| 181 | |
| 182 | // LayerType returns the ethernet type of TOAMSetResponse |
| 183 | func (d *TOAMSetResponse) LayerType() gopacket.LayerType { return layers.LayerTypeEthernet } |
| 184 | |
| 185 | // Decode decodes byte arrays to a data structure |
| 186 | func (d *TOAMSetResponse) Decode(data []byte) error { |
| 187 | i := 0 |
| 188 | d.Opcode = data[i] |
| 189 | i++ |
| 190 | d.Flags = binary.BigEndian.Uint16(data[i : i+2]) |
| 191 | i += 2 |
| 192 | d.OAMPDUCode = data[i] |
| 193 | i++ |
| 194 | d.OUId = data[i : i+3] |
| 195 | i += len(d.OUId) |
| 196 | d.TOMIOpcode = data[i] |
| 197 | i++ |
| 198 | d.CTBranch = data[i] |
| 199 | i++ |
| 200 | d.CTType = binary.BigEndian.Uint16(data[i : i+2]) |
| 201 | i += 2 |
| 202 | d.CTLength = data[i] |
| 203 | i++ |
| 204 | d.CTInstance = binary.BigEndian.Uint32(data[i : i+4]) |
| 205 | i += 4 |
| 206 | d.OCBranch = data[i] |
| 207 | i++ |
| 208 | d.OCType = binary.BigEndian.Uint16(data[i : i+2]) |
| 209 | i += 2 |
| 210 | d.OCLength = data[i] |
| 211 | i++ |
| 212 | d.OCInstance = binary.BigEndian.Uint32(data[i : i+4]) |
| 213 | i += 4 |
| 214 | d.VcBranch = data[i] |
| 215 | i++ |
| 216 | d.VcLeaf = binary.BigEndian.Uint16(data[i : i+2]) |
| 217 | i += 2 |
| 218 | d.VcTOMIResCode = data[i] |
| 219 | i++ |
| 220 | d.EndBranch = data[i] |
| 221 | |
| 222 | return nil |
| 223 | } |