Chidambar babu | 86b3b1a | 2016-02-16 17:39:52 +0530 | [diff] [blame] | 1 | /* |
Brian O'Connor | a09fe5b | 2017-08-03 21:12:30 -0700 | [diff] [blame] | 2 | * Copyright 2016-present Open Networking Foundation |
Chidambar babu | 86b3b1a | 2016-02-16 17:39:52 +0530 | [diff] [blame] | 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 | package org.onosproject.ospf.protocol.util; |
| 17 | |
| 18 | import com.google.common.primitives.Bytes; |
| 19 | import org.jboss.netty.buffer.ChannelBuffer; |
| 20 | import org.jboss.netty.buffer.ChannelBuffers; |
| 21 | import org.onlab.packet.Ip4Address; |
| 22 | import org.onosproject.ospf.protocol.lsa.LsaHeader; |
| 23 | import org.onosproject.ospf.protocol.lsa.OpaqueLsaHeader; |
| 24 | import org.slf4j.Logger; |
| 25 | import org.slf4j.LoggerFactory; |
| 26 | |
| 27 | import javax.xml.bind.DatatypeConverter; |
| 28 | import java.net.InetAddress; |
Ray Milkey | 019fba4 | 2018-01-31 14:07:47 -0800 | [diff] [blame] | 29 | import java.net.UnknownHostException; |
Ray Milkey | b68bbbc | 2017-12-18 10:05:49 -0800 | [diff] [blame] | 30 | import java.security.SecureRandom; |
Chidambar babu | 86b3b1a | 2016-02-16 17:39:52 +0530 | [diff] [blame] | 31 | import java.util.Arrays; |
| 32 | import java.util.Collections; |
| 33 | import java.util.List; |
| 34 | import java.util.Random; |
| 35 | import java.util.StringTokenizer; |
| 36 | |
| 37 | /** |
| 38 | * Representation of an OSPF constants and utility methods. |
| 39 | */ |
| 40 | public final class OspfUtil { |
Chidambar babu | 86b3b1a | 2016-02-16 17:39:52 +0530 | [diff] [blame] | 41 | public static final int OSPF_VERSION_2 = 2; |
| 42 | public static final int OSPF_VERSION = OSPF_VERSION_2; |
| 43 | public static final int PACKET_MINIMUM_LENGTH = 24; |
sunishvk | f7c5655 | 2016-07-18 16:02:39 +0530 | [diff] [blame] | 44 | public static final int METADATA_LEN = 5; |
| 45 | public static final int MINIMUM_FRAME_LEN = 1487; |
Chidambar babu | 86b3b1a | 2016-02-16 17:39:52 +0530 | [diff] [blame] | 46 | public static final int OSPF_HEADER_LENGTH = 24; |
| 47 | public static final int LSA_HEADER_LENGTH = 20; |
| 48 | public static final int DD_HEADER_LENGTH = OSPF_HEADER_LENGTH + 8; |
| 49 | public static final int LSREQUEST_LENGTH = 12; |
| 50 | public static final int OSPFPACKET_LENGTH_POS1 = 2; |
| 51 | public static final int OSPFPACKET_LENGTH_POS2 = 3; |
| 52 | public static final int OSPFPACKET_CHECKSUM_POS1 = 12; |
| 53 | public static final int OSPFPACKET_CHECKSUM_POS2 = 13; |
| 54 | public static final int LSAPACKET_CHECKSUM_POS1 = 16; |
| 55 | public static final int LSAPACKET_CHECKSUM_POS2 = 17; |
| 56 | public static final Ip4Address ALL_SPF_ROUTERS = Ip4Address.valueOf("224.0.0.5"); |
| 57 | public static final Ip4Address ALL_DROUTERS = Ip4Address.valueOf("224.0.0.6"); |
sunishvk | f7c5655 | 2016-07-18 16:02:39 +0530 | [diff] [blame] | 58 | public static final Ip4Address DEFAULTIP = Ip4Address.valueOf("0.0.0.0"); |
| 59 | public static final int RETRANSMITINTERVAL = 5; |
Chidambar babu | 86b3b1a | 2016-02-16 17:39:52 +0530 | [diff] [blame] | 60 | public static final int ONLY_ALL_SPF_ROUTERS = 1; |
| 61 | public static final int JOIN_ALL_DROUTERS = 2; |
| 62 | public static final int INITIALIZE_SET = 1; |
| 63 | public static final int INITIALIZE_NOTSET = 0; |
| 64 | public static final int MORE_SET = 1; |
| 65 | public static final int MORE_NOTSET = 0; |
| 66 | public static final int IS_MASTER = 1; |
| 67 | public static final int NOT_MASTER = 0; |
| 68 | public static final int NOT_ASSIGNED = 0; |
| 69 | public static final int FOUR_BYTES = 4; |
sunishvk | f7c5655 | 2016-07-18 16:02:39 +0530 | [diff] [blame] | 70 | public static final int FIVE_BYTES = 5; |
Chidambar babu | 86b3b1a | 2016-02-16 17:39:52 +0530 | [diff] [blame] | 71 | public static final int EIGHT_BYTES = 8; |
| 72 | public static final int TWELVE_BYTES = 12; |
| 73 | public static final int EXTERNAL_DESTINATION_LENGTH = 12; |
sunishvk | f7c5655 | 2016-07-18 16:02:39 +0530 | [diff] [blame] | 74 | public static final String SHOST = "127.0.0.1"; |
| 75 | public static final int SPORT = 7000; |
| 76 | public static final int MTU = 1500; |
| 77 | public static final char CONFIG_LENGTH = 1498; |
| 78 | public static final char ROUTER_PRIORITY = 0; |
| 79 | public static final int HELLO_PACKET_OPTIONS = 2; |
Chidambar babu | 86b3b1a | 2016-02-16 17:39:52 +0530 | [diff] [blame] | 80 | private static final Logger log = |
| 81 | LoggerFactory.getLogger(OspfUtil.class); |
| 82 | |
| 83 | /** |
| 84 | * Creates an instance. |
| 85 | */ |
| 86 | private OspfUtil() { |
| 87 | |
| 88 | } |
| 89 | |
| 90 | /** |
| 91 | * Checks given IPs are in same network or not. |
| 92 | * |
| 93 | * @param ip1 IP address |
| 94 | * @param ip2 IP address |
| 95 | * @param mask network mask |
| 96 | * @return true if both are in same network else false |
Chidambar babu | 86b3b1a | 2016-02-16 17:39:52 +0530 | [diff] [blame] | 97 | */ |
Ray Milkey | 019fba4 | 2018-01-31 14:07:47 -0800 | [diff] [blame] | 98 | public static boolean sameNetwork(Ip4Address ip1, Ip4Address ip2, Ip4Address mask) { |
Chidambar babu | 86b3b1a | 2016-02-16 17:39:52 +0530 | [diff] [blame] | 99 | |
| 100 | byte[] a1 = ip1.toOctets(); |
| 101 | byte[] a2 = ip2.toOctets(); |
| 102 | byte[] m = mask.toOctets(); |
| 103 | |
| 104 | for (int i = 0; i < a1.length; i++) { |
| 105 | if ((a1[i] & m[i]) != (a2[i] & m[i])) { |
| 106 | return false; |
| 107 | } |
| 108 | } |
| 109 | |
| 110 | return true; |
| 111 | } |
| 112 | |
| 113 | /** |
| 114 | * Converts IP address to long. |
| 115 | * |
| 116 | * @param ipAddress IP address |
| 117 | * @return long value represents IP address |
| 118 | */ |
| 119 | public static long ipAddressToLong(String ipAddress) { |
| 120 | StringTokenizer st = new StringTokenizer(ipAddress, "."); |
| 121 | long ipAsNumber = Long.parseLong(st.nextToken()) * (long) Math.pow(256, 3); |
| 122 | ipAsNumber += Long.parseLong(st.nextToken()) * (long) Math.pow(256, 2); |
| 123 | ipAsNumber += Long.parseLong(st.nextToken()) * 256; |
| 124 | ipAsNumber += +Long.parseLong(st.nextToken()); |
| 125 | |
| 126 | return ipAsNumber; |
| 127 | } |
| 128 | |
| 129 | /** |
| 130 | * Checks option field to see whether opaque enabled or not. |
| 131 | * 2nd Bit in options field of DdPacket represents Opaque. |
| 132 | * 7th bit is external capability. |
| 133 | * This method checks Opaque bit is set in the options or not. |
| 134 | * |
| 135 | * @param options options value |
| 136 | * @return true if opaque enabled else false. |
| 137 | */ |
| 138 | public static boolean isOpaqueEnabled(int options) { |
| 139 | Boolean[] bits = new Boolean[8]; |
| 140 | for (int i = 7; i >= 0; i--) { |
| 141 | bits[i] = (options & (1 << i)) != 0; |
| 142 | } |
| 143 | |
| 144 | List<Boolean> list = Arrays.asList(bits); |
| 145 | Collections.reverse(list); |
| 146 | |
| 147 | //2nd bit is Opaque. |
| 148 | return list.get(1); |
| 149 | } |
| 150 | |
| 151 | /** |
| 152 | * Converts a byte to integer variable. |
| 153 | * |
| 154 | * @param bytesToConvert bytes to convert |
| 155 | * @return integer representation of bytes |
| 156 | */ |
| 157 | public static int byteToInteger(byte[] bytesToConvert) { |
| 158 | final StringBuilder builder = new StringBuilder(); |
| 159 | for (byte eachByte : bytesToConvert) { |
| 160 | builder.append(String.format("%02x", eachByte)); |
| 161 | } |
| 162 | int num = Integer.parseInt(builder.toString(), 16); |
| 163 | return num; |
| 164 | } |
| 165 | |
| 166 | /** |
| 167 | * Converts a byte to long variable. |
| 168 | * |
| 169 | * @param bytesToConvert bytes to convert |
| 170 | * @return long representation of bytes |
| 171 | */ |
| 172 | public static long byteToLong(byte[] bytesToConvert) { |
| 173 | final StringBuilder builder = new StringBuilder(); |
| 174 | for (byte eachByte : bytesToConvert) { |
| 175 | builder.append(String.format("%02x", eachByte)); |
| 176 | } |
| 177 | long num = Long.parseLong(builder.toString(), 16); |
| 178 | return num; |
| 179 | } |
| 180 | |
| 181 | /** |
| 182 | * Creates a random number. |
| 183 | * |
| 184 | * @return random number |
| 185 | */ |
| 186 | public static int createRandomNumber() { |
Ray Milkey | b68bbbc | 2017-12-18 10:05:49 -0800 | [diff] [blame] | 187 | Random rnd = new SecureRandom(); |
Chidambar babu | 86b3b1a | 2016-02-16 17:39:52 +0530 | [diff] [blame] | 188 | int randomNumber = 10000000 + rnd.nextInt(90000000); |
| 189 | return randomNumber; |
| 190 | } |
| 191 | |
| 192 | /** |
| 193 | * Reads the LSA header from channel buffer. |
| 194 | * |
| 195 | * @param channelBuffer channel buffer instance |
| 196 | * @return LSA header instance. |
Chidambar babu | 86b3b1a | 2016-02-16 17:39:52 +0530 | [diff] [blame] | 197 | */ |
Ray Milkey | 019fba4 | 2018-01-31 14:07:47 -0800 | [diff] [blame] | 198 | public static LsaHeader readLsaHeader(ChannelBuffer channelBuffer) { |
Chidambar babu | 86b3b1a | 2016-02-16 17:39:52 +0530 | [diff] [blame] | 199 | //add all the LSA Headers - one header is of 20 bytes |
| 200 | LsaHeader lsaHeader = null; |
| 201 | if (channelBuffer.readableBytes() >= OspfUtil.LSA_HEADER_LENGTH) { |
| 202 | byte[] byteArray = new byte[OspfUtil.FOUR_BYTES]; |
| 203 | channelBuffer.readBytes(byteArray, 0, OspfUtil.FOUR_BYTES); |
| 204 | ChannelBuffer tempBuffer = ChannelBuffers.copiedBuffer(byteArray); |
| 205 | int lsType = byteArray[3]; |
| 206 | if (lsType == OspfParameters.AREA_LOCAL_OPAQUE_LSA || lsType == OspfParameters.LINK_LOCAL_OPAQUE_LSA |
| 207 | || lsType == OspfParameters.AS_OPAQUE_LSA) { |
| 208 | OpaqueLsaHeader header = new OpaqueLsaHeader(); |
| 209 | header.setAge(tempBuffer.readShort()); |
| 210 | header.setOptions(tempBuffer.readByte()); |
| 211 | header.setLsType(tempBuffer.readByte()); |
| 212 | header.setOpaqueType(channelBuffer.readByte()); |
| 213 | header.setOpaqueId(channelBuffer.readUnsignedMedium()); |
| 214 | byte[] tempByteArray = new byte[OspfUtil.FOUR_BYTES]; |
| 215 | channelBuffer.readBytes(tempByteArray, 0, OspfUtil.FOUR_BYTES); |
| 216 | header.setAdvertisingRouter(Ip4Address.valueOf(tempByteArray)); |
| 217 | header.setLsSequenceNo(channelBuffer.readInt()); |
| 218 | header.setLsCheckSum(channelBuffer.readUnsignedShort()); |
| 219 | header.setLsPacketLen(channelBuffer.readShort()); |
| 220 | byte[] opaqueIdBytes = OspfUtil.convertToTwoBytes(header.opaqueId()); |
| 221 | header.setLinkStateId(header.opaqueType() + "." + "0" + "." + |
| 222 | opaqueIdBytes[0] + "." + opaqueIdBytes[1]); |
| 223 | lsaHeader = header; |
| 224 | } else { |
| 225 | LsaHeader header = new LsaHeader(); |
| 226 | header.setAge(tempBuffer.readShort()); |
| 227 | header.setOptions(tempBuffer.readByte()); |
| 228 | header.setLsType(tempBuffer.readByte()); |
| 229 | byte[] tempByteArray = new byte[OspfUtil.FOUR_BYTES]; |
| 230 | channelBuffer.readBytes(tempByteArray, 0, OspfUtil.FOUR_BYTES); |
Ray Milkey | 019fba4 | 2018-01-31 14:07:47 -0800 | [diff] [blame] | 231 | try { |
| 232 | header.setLinkStateId(InetAddress.getByAddress(tempByteArray).getHostName()); |
| 233 | } catch (UnknownHostException uhe) { |
| 234 | log.warn("Can't look up host", uhe); |
| 235 | } |
Chidambar babu | 86b3b1a | 2016-02-16 17:39:52 +0530 | [diff] [blame] | 236 | tempByteArray = new byte[OspfUtil.FOUR_BYTES]; |
| 237 | channelBuffer.readBytes(tempByteArray, 0, OspfUtil.FOUR_BYTES); |
| 238 | header.setAdvertisingRouter(Ip4Address.valueOf(tempByteArray)); |
| 239 | header.setLsSequenceNo(channelBuffer.readInt()); |
| 240 | header.setLsCheckSum(channelBuffer.readUnsignedShort()); |
| 241 | header.setLsPacketLen(channelBuffer.readShort()); |
| 242 | lsaHeader = header; |
| 243 | } |
| 244 | } |
| 245 | return lsaHeader; |
| 246 | } |
| 247 | |
| 248 | |
| 249 | /** |
| 250 | * Converts an integer to two bytes. |
| 251 | * |
| 252 | * @param numberToConvert number to convert |
| 253 | * @return given number as bytes |
| 254 | */ |
| 255 | public static byte[] convertToTwoBytes(int numberToConvert) { |
| 256 | |
| 257 | byte[] numInBytes = new byte[2]; |
| 258 | String s1 = Integer.toHexString(numberToConvert); |
| 259 | if (s1.length() % 2 != 0) { |
| 260 | s1 = "0" + s1; |
| 261 | } |
| 262 | byte[] hexas = DatatypeConverter.parseHexBinary(s1); |
| 263 | if (hexas.length == 1) { |
| 264 | numInBytes[0] = 0; |
| 265 | numInBytes[1] = hexas[0]; |
| 266 | } else { |
| 267 | numInBytes[0] = hexas[0]; |
| 268 | numInBytes[1] = hexas[1]; |
| 269 | } |
| 270 | return numInBytes; |
| 271 | } |
| 272 | |
| 273 | /** |
| 274 | * Converts a number to three bytes. |
| 275 | * |
| 276 | * @param numberToConvert number to convert |
| 277 | * @return given number as bytes |
| 278 | */ |
| 279 | public static byte[] convertToThreeBytes(int numberToConvert) { |
| 280 | byte[] numInBytes = new byte[3]; |
| 281 | String s1 = Integer.toHexString(numberToConvert); |
| 282 | if (s1.length() % 2 != 0) { |
| 283 | s1 = "0" + s1; |
| 284 | } |
| 285 | byte[] hexas = DatatypeConverter.parseHexBinary(s1); |
| 286 | if (hexas.length == 1) { |
| 287 | numInBytes[0] = 0; |
| 288 | numInBytes[1] = 0; |
| 289 | numInBytes[2] = hexas[0]; |
| 290 | } else if (hexas.length == 2) { |
| 291 | numInBytes[0] = 0; |
| 292 | numInBytes[1] = hexas[0]; |
| 293 | numInBytes[2] = hexas[1]; |
| 294 | } else { |
| 295 | numInBytes[0] = hexas[0]; |
| 296 | numInBytes[1] = hexas[1]; |
| 297 | numInBytes[2] = hexas[2]; |
| 298 | } |
| 299 | return numInBytes; |
| 300 | } |
| 301 | |
| 302 | /** |
| 303 | * Converts a number to four bytes. |
| 304 | * |
| 305 | * @param numberToConvert number to convert |
| 306 | * @return given number as bytes |
| 307 | */ |
| 308 | public static byte[] convertToFourBytes(int numberToConvert) { |
| 309 | |
| 310 | byte[] numInBytes = new byte[4]; |
| 311 | String s1 = Integer.toHexString(numberToConvert); |
| 312 | if (s1.length() % 2 != 0) { |
| 313 | s1 = "0" + s1; |
| 314 | } |
| 315 | byte[] hexas = DatatypeConverter.parseHexBinary(s1); |
| 316 | if (hexas.length == 1) { |
| 317 | numInBytes[0] = 0; |
| 318 | numInBytes[1] = 0; |
| 319 | numInBytes[2] = 0; |
| 320 | numInBytes[3] = hexas[0]; |
| 321 | } else if (hexas.length == 2) { |
| 322 | numInBytes[0] = 0; |
| 323 | numInBytes[1] = 0; |
| 324 | numInBytes[2] = hexas[0]; |
| 325 | numInBytes[3] = hexas[1]; |
| 326 | } else if (hexas.length == 3) { |
| 327 | numInBytes[0] = 0; |
| 328 | numInBytes[1] = hexas[0]; |
| 329 | numInBytes[2] = hexas[1]; |
| 330 | numInBytes[3] = hexas[2]; |
| 331 | } else { |
| 332 | numInBytes[0] = hexas[0]; |
| 333 | numInBytes[1] = hexas[1]; |
| 334 | numInBytes[2] = hexas[2]; |
| 335 | numInBytes[3] = hexas[3]; |
| 336 | } |
| 337 | return numInBytes; |
| 338 | } |
| 339 | |
| 340 | /** |
| 341 | * Converts a number to four bytes. |
| 342 | * |
| 343 | * @param numberToConvert number to convert |
| 344 | * @return given number as bytes |
| 345 | */ |
| 346 | public static byte[] convertToFourBytes(long numberToConvert) { |
| 347 | |
| 348 | byte[] numInBytes = new byte[4]; |
| 349 | String s1 = Long.toHexString(numberToConvert); |
| 350 | if (s1.length() % 2 != 0) { |
| 351 | s1 = "0" + s1; |
| 352 | } |
| 353 | if (s1.length() == 16) { |
| 354 | s1 = s1.substring(8, s1.length()); |
| 355 | } |
| 356 | byte[] hexas = DatatypeConverter.parseHexBinary(s1); |
| 357 | if (hexas.length == 1) { |
| 358 | numInBytes[0] = 0; |
| 359 | numInBytes[1] = 0; |
| 360 | numInBytes[2] = 0; |
| 361 | numInBytes[3] = hexas[0]; |
| 362 | } else if (hexas.length == 2) { |
| 363 | numInBytes[0] = 0; |
| 364 | numInBytes[1] = 0; |
| 365 | numInBytes[2] = hexas[0]; |
| 366 | numInBytes[3] = hexas[1]; |
| 367 | } else if (hexas.length == 3) { |
| 368 | numInBytes[0] = 0; |
| 369 | numInBytes[1] = hexas[0]; |
| 370 | numInBytes[2] = hexas[1]; |
| 371 | numInBytes[3] = hexas[2]; |
| 372 | } else { |
| 373 | numInBytes[0] = hexas[0]; |
| 374 | numInBytes[1] = hexas[1]; |
| 375 | numInBytes[2] = hexas[2]; |
| 376 | numInBytes[3] = hexas[3]; |
| 377 | } |
| 378 | return numInBytes; |
| 379 | } |
| 380 | |
| 381 | /** |
| 382 | * Adds the checksum and length in packet. |
| 383 | * |
| 384 | * @param ospfPacket ospf packet |
| 385 | * @param lengthBytePos1 length byte position |
| 386 | * @param lengthBytePos2 length byte position |
| 387 | * @param checksumBytePos1 checksum byte position |
| 388 | * @param checksumBytePos2 checksum byte position |
| 389 | * @return byte array with checksum and length |
| 390 | */ |
| 391 | public static byte[] addLengthAndCheckSum(byte[] ospfPacket, int lengthBytePos1, int lengthBytePos2, |
| 392 | int checksumBytePos1, int checksumBytePos2) { |
| 393 | //Set the length of the packet |
| 394 | //Get the total length of the packet |
| 395 | int length = ospfPacket.length; |
| 396 | //Convert the lenth to two bytes as the length field is 2 bytes |
| 397 | byte[] lenthInTwoBytes = OspfUtil.convertToTwoBytes(length); |
| 398 | //ospf header 3rd and 4th position represents length |
| 399 | ospfPacket[lengthBytePos1] = lenthInTwoBytes[0]; //assign 1st byte in lengthBytePos1 |
| 400 | ospfPacket[lengthBytePos2] = lenthInTwoBytes[1]; //assign 2st byte in lengthBytePos2 |
| 401 | |
| 402 | //Get the checksum as two bytes. |
| 403 | byte[] checkSumInTwoBytes = new ChecksumCalculator().calculateOspfCheckSum(ospfPacket, |
| 404 | checksumBytePos1, checksumBytePos2); |
| 405 | ospfPacket[checksumBytePos1] = checkSumInTwoBytes[0]; //assign 1st byte in checksumBytePos1 |
| 406 | ospfPacket[checksumBytePos2] = checkSumInTwoBytes[1]; //assign 2st byte in checksumBytePos2 |
| 407 | |
| 408 | return ospfPacket; |
| 409 | } |
| 410 | |
| 411 | /** |
| 412 | * Adds metadata to ospf packet like whether to join multi cast group and destination IP. |
| 413 | * |
sunishvk | f7c5655 | 2016-07-18 16:02:39 +0530 | [diff] [blame] | 414 | * @param interfaceIndex interface index |
Chidambar babu | 86b3b1a | 2016-02-16 17:39:52 +0530 | [diff] [blame] | 415 | * @param ospfPacket OSPF packet |
| 416 | * @param allDroutersValue whether to join multi cast or not |
| 417 | * @param destinationIp destination ip address |
| 418 | * @return byte array |
| 419 | */ |
sunishvk | f7c5655 | 2016-07-18 16:02:39 +0530 | [diff] [blame] | 420 | public static byte[] addMetadata(int interfaceIndex, byte[] ospfPacket, int allDroutersValue, |
| 421 | Ip4Address destinationIp) { |
Chidambar babu | 86b3b1a | 2016-02-16 17:39:52 +0530 | [diff] [blame] | 422 | byte[] packet; |
sunishvk | f7c5655 | 2016-07-18 16:02:39 +0530 | [diff] [blame] | 423 | byte[] interfaceIndexByteVal = {(byte) interfaceIndex}; |
Chidambar babu | 86b3b1a | 2016-02-16 17:39:52 +0530 | [diff] [blame] | 424 | byte[] allDroutersByteVal = {(byte) allDroutersValue}; |
| 425 | byte[] destIpAsBytes = destinationIp.toOctets(); |
sunishvk | f7c5655 | 2016-07-18 16:02:39 +0530 | [diff] [blame] | 426 | byte[] metadata = Bytes.concat(interfaceIndexByteVal, allDroutersByteVal); |
| 427 | metadata = Bytes.concat(metadata, destIpAsBytes); |
| 428 | packet = Bytes.concat(ospfPacket, metadata); |
Chidambar babu | 86b3b1a | 2016-02-16 17:39:52 +0530 | [diff] [blame] | 429 | |
| 430 | return packet; |
| 431 | } |
| 432 | } |