Ari Saha | 79d7c25 | 2015-06-26 10:31:48 -0700 | [diff] [blame] | 1 | /* |
| 2 | * |
| 3 | * * Copyright 2015 AT&T Foundry |
| 4 | * * |
| 5 | * * Licensed under the Apache License, Version 2.0 (the "License"); |
| 6 | * * you may not use this file except in compliance with the License. |
| 7 | * * You may obtain a copy of the License at |
| 8 | * * |
| 9 | * * http://www.apache.org/licenses/LICENSE-2.0 |
| 10 | * * |
| 11 | * * Unless required by applicable law or agreed to in writing, software |
| 12 | * * distributed under the License is distributed on an "AS IS" BASIS, |
| 13 | * * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 14 | * * See the License for the specific language governing permissions and |
| 15 | * * limitations under the License. |
| 16 | * |
| 17 | */ |
| 18 | |
| 19 | package org.onosproject.aaa.packet; |
| 20 | |
| 21 | import org.onlab.packet.BasePacket; |
alshabib | 7b808c5 | 2015-06-26 14:22:24 -0700 | [diff] [blame^] | 22 | import org.onlab.packet.Deserializer; |
Ari Saha | 79d7c25 | 2015-06-26 10:31:48 -0700 | [diff] [blame] | 23 | import org.onlab.packet.Ethernet; |
| 24 | import org.onlab.packet.IPacket; |
| 25 | import org.onlab.packet.MacAddress; |
| 26 | |
| 27 | import java.nio.ByteBuffer; |
| 28 | |
alshabib | 7b808c5 | 2015-06-26 14:22:24 -0700 | [diff] [blame^] | 29 | import static org.onlab.packet.PacketUtils.checkInput; |
| 30 | |
Ari Saha | 79d7c25 | 2015-06-26 10:31:48 -0700 | [diff] [blame] | 31 | /** |
| 32 | * |
| 33 | */ |
| 34 | public class EAPOL extends BasePacket { |
| 35 | |
| 36 | private byte version = 0x01; |
| 37 | private byte eapolType; |
| 38 | private short packetLength; |
| 39 | |
| 40 | /* EAPOL Packet Type */ |
| 41 | public static final byte EAPOL_PACKET = 0x0; |
| 42 | public static final byte EAPOL_START = 0x1; |
| 43 | public static final byte EAPOL_LOGOFF = 0x2; |
| 44 | public static final byte EAPOL_KEY = 0x3; |
| 45 | public static final byte EAPOL_ASF = 0x4; |
| 46 | |
| 47 | public static final MacAddress PAE_GROUP_ADDR = MacAddress.valueOf(new byte[] { |
| 48 | (byte) 0x01, (byte) 0x80, (byte) 0xc2, (byte) 0x00, (byte) 0x00, (byte) 0x03 |
| 49 | }); |
| 50 | |
| 51 | |
| 52 | /** |
| 53 | * Get version. |
| 54 | * @return version |
| 55 | */ |
| 56 | public byte getVersion() { |
| 57 | return this.version; |
| 58 | } |
| 59 | |
| 60 | /** |
| 61 | * Set version. |
| 62 | * @param version EAPOL version |
| 63 | * @return this |
| 64 | */ |
| 65 | public EAPOL setVersion(final byte version) { |
| 66 | this.version = version; |
| 67 | return this; |
| 68 | } |
| 69 | |
| 70 | /** |
| 71 | * Get type. |
| 72 | * @return EAPOL type |
| 73 | */ |
| 74 | public byte getEapolType() { |
| 75 | return this.eapolType; |
| 76 | } |
| 77 | |
| 78 | /** |
| 79 | * Set EAPOL type. |
| 80 | * @param eapolType EAPOL type |
| 81 | * @return this |
| 82 | */ |
| 83 | public EAPOL setEapolType(final byte eapolType) { |
| 84 | this.eapolType = eapolType; |
| 85 | return this; |
| 86 | } |
| 87 | |
| 88 | /** |
| 89 | * Get packet length. |
| 90 | * @return packet length |
| 91 | */ |
| 92 | public short getPacketLength() { |
| 93 | return this.packetLength; |
| 94 | } |
| 95 | |
| 96 | /** |
| 97 | * Set packet length. |
| 98 | * @param packetLen packet length |
| 99 | * @return this |
| 100 | */ |
| 101 | public EAPOL setPacketLength(final short packetLen) { |
| 102 | this.packetLength = packetLen; |
| 103 | return this; |
| 104 | } |
| 105 | |
| 106 | |
| 107 | |
| 108 | /** |
| 109 | * Serializes the packet, based on the code/type using the payload |
| 110 | * to compute its length. |
| 111 | * @return this |
| 112 | */ |
| 113 | @Override |
| 114 | public byte[] serialize() { |
| 115 | |
| 116 | byte[] payloadData = null; |
| 117 | |
| 118 | if (this.payload != null) { |
| 119 | this.payload.setParent(this); |
| 120 | payloadData = this.payload.serialize(); |
| 121 | } |
| 122 | |
| 123 | //prepare the buffer to hold the version (1), packet type (1), packet length (2) and the eap payload. |
| 124 | //if there is no payload, packet length is 0 |
| 125 | byte[] data = new byte[4 + this.packetLength]; |
| 126 | final ByteBuffer bb = ByteBuffer.wrap(data); |
| 127 | bb.put(this.version); |
| 128 | bb.put(this.eapolType); |
| 129 | bb.putShort(this.packetLength); |
| 130 | |
| 131 | //put the EAP payload |
| 132 | if (payloadData != null) { |
| 133 | bb.put(payloadData); |
| 134 | } |
| 135 | |
| 136 | return data; |
| 137 | } |
| 138 | |
Ari Saha | 79d7c25 | 2015-06-26 10:31:48 -0700 | [diff] [blame] | 139 | |
| 140 | |
Ari Saha | 79d7c25 | 2015-06-26 10:31:48 -0700 | [diff] [blame] | 141 | @Override |
| 142 | public int hashCode() { |
| 143 | final int prime = 3889; |
| 144 | int result = super.hashCode(); |
| 145 | result = prime * result + this.version; |
| 146 | result = prime * result + this.eapolType; |
| 147 | result = prime * result + this.packetLength; |
| 148 | return result; |
| 149 | } |
| 150 | |
| 151 | /** |
| 152 | * |
| 153 | * @param dstMac |
| 154 | * @param srcMac |
| 155 | * @param eapolType |
| 156 | * @param eap |
| 157 | * @return Ethernet frame |
| 158 | */ |
| 159 | public static Ethernet buildEapolResponse(MacAddress dstMac, MacAddress srcMac, |
| 160 | short vlan, byte eapolType, EAP eap) { |
| 161 | |
| 162 | Ethernet eth = new Ethernet(); |
| 163 | eth.setDestinationMACAddress(dstMac.toBytes()); |
| 164 | eth.setSourceMACAddress(srcMac.toBytes()); |
| 165 | eth.setEtherType(EAPEthernet.TYPE_PAE); |
| 166 | if (vlan != Ethernet.VLAN_UNTAGGED) { |
| 167 | eth.setVlanID(vlan); |
| 168 | } |
| 169 | //eapol header |
| 170 | EAPOL eapol = new EAPOL(); |
| 171 | eapol.setEapolType(eapolType); |
| 172 | eapol.setPacketLength(eap.getLength()); |
| 173 | |
| 174 | //eap part |
| 175 | eapol.setPayload(eap); |
| 176 | |
| 177 | eth.setPayload(eapol); |
| 178 | eth.setPad(true); |
| 179 | return eth; |
| 180 | } |
alshabib | 7b808c5 | 2015-06-26 14:22:24 -0700 | [diff] [blame^] | 181 | |
| 182 | public static Deserializer<EAPOL> deserializer() { |
| 183 | return (data, offset, length) -> { |
| 184 | checkInput(data, offset, length, 0); |
| 185 | |
| 186 | EAPOL eapol = new EAPOL(); |
| 187 | final ByteBuffer bb = ByteBuffer.wrap(data, offset, length); |
| 188 | eapol.setVersion(bb.get()); |
| 189 | eapol.setEapolType(bb.get()); |
| 190 | eapol.setPacketLength(bb.getShort()); |
| 191 | |
| 192 | if (eapol.packetLength > 0) { |
| 193 | //deserialize the EAP Payload |
| 194 | eapol.payload = new EAP(); |
| 195 | |
| 196 | eapol.payload = eapol.payload.deserialize(data, bb.position(), length - 4); |
| 197 | eapol.payload.setParent(eapol); |
| 198 | } |
| 199 | return eapol; |
| 200 | }; |
| 201 | } |
| 202 | |
| 203 | @Override |
| 204 | public IPacket deserialize(final byte[] data, final int offset, |
| 205 | final int length) { |
| 206 | final ByteBuffer bb = ByteBuffer.wrap(data, offset, length); |
| 207 | |
| 208 | |
| 209 | //deserialize the EAPOL header |
| 210 | this.version = bb.get(); |
| 211 | this.eapolType = bb.get(); |
| 212 | this.packetLength = bb.getShort(); |
| 213 | |
| 214 | if (this.packetLength > 0) { |
| 215 | //deserialize the EAP Payload |
| 216 | this.payload = new EAP(); |
| 217 | |
| 218 | this.payload = this.payload.deserialize(data, bb.position(), length - 4); |
| 219 | this.payload.setParent(this); |
| 220 | } |
| 221 | |
| 222 | |
| 223 | return this; |
| 224 | } |
| 225 | |
| 226 | |
Ari Saha | 79d7c25 | 2015-06-26 10:31:48 -0700 | [diff] [blame] | 227 | } |
| 228 | |