alshabib | 7911a05 | 2014-10-16 17:49:37 -0700 | [diff] [blame^] | 1 | package org.onlab.packet; |
| 2 | |
| 3 | import com.google.common.collect.Lists; |
| 4 | import org.apache.commons.lang.ArrayUtils; |
| 5 | |
| 6 | import java.nio.ByteBuffer; |
| 7 | |
| 8 | /** |
| 9 | * ONOS LLDP containing organizational TLV for ONOS device dicovery. |
| 10 | */ |
| 11 | public class ONOSLLDP extends LLDP { |
| 12 | |
| 13 | public static final byte[] ONLAB_OUI = {(byte) 0xa4, 0x23, 0x05}; |
| 14 | public static final String DEFAULT_DEVICE = "INVALID"; |
| 15 | public static final String DEFAULT_NAME = "ONOS Discovery"; |
| 16 | |
| 17 | public static final byte[] LLDP_NICIRA = {0x01, 0x23, 0x20, 0x00, 0x00, |
| 18 | 0x01}; |
| 19 | public static final byte[] LLDP_MULTICAST = {0x01, (byte) 0x80, |
| 20 | (byte) 0xc2, 0x00, 0x00, 0x0e}; |
| 21 | public static final byte[] BDDP_MULTICAST = {(byte) 0xff, (byte) 0xff, |
| 22 | (byte) 0xff, (byte) 0xff, (byte) 0xff, (byte) 0xff}; |
| 23 | |
| 24 | private static final byte NAME_SUBTYPE = 1; |
| 25 | private static final byte DEVICE_SUBTYPE = 2; |
| 26 | private static final short NAME_LENGTH = 4; //1 for subtype + 3 for OUI |
| 27 | private static final short DEVICE_LENGTH = 4; //1 for subtype + 3 for OUI |
| 28 | private final LLDPOrganizationalTLV nameTLV = new LLDPOrganizationalTLV(); |
| 29 | private final LLDPOrganizationalTLV deviceTLV = new LLDPOrganizationalTLV(); |
| 30 | |
| 31 | // TLV constants: type, size and subtype |
| 32 | // Organizationally specific TLV also have packet offset and contents of TLV |
| 33 | // header |
| 34 | private static final byte CHASSIS_TLV_TYPE = 1; |
| 35 | private static final byte CHASSIS_TLV_SIZE = 7; |
| 36 | private static final byte CHASSIS_TLV_SUBTYPE = 4; |
| 37 | |
| 38 | private static final byte PORT_TLV_TYPE = 2; |
| 39 | private static final byte PORT_TLV_SIZE = 5; |
| 40 | private static final byte PORT_TLV_SUBTYPE = 2; |
| 41 | |
| 42 | private static final byte TTL_TLV_TYPE = 3; |
| 43 | |
| 44 | |
| 45 | private final byte[] ttlValue = new byte[] {0, 0x78}; |
| 46 | |
| 47 | public ONOSLLDP() { |
| 48 | super(); |
| 49 | setName(DEFAULT_NAME); |
| 50 | setDevice(DEFAULT_DEVICE); |
| 51 | setOptionalTLVList(Lists.<LLDPTLV>newArrayList(nameTLV, deviceTLV)); |
| 52 | setTtl(new LLDPTLV().setType((byte) TTL_TLV_TYPE) |
| 53 | .setLength((short) ttlValue.length) |
| 54 | .setValue(ttlValue)); |
| 55 | |
| 56 | } |
| 57 | |
| 58 | private ONOSLLDP(LLDP lldp) { |
| 59 | this.portId = lldp.getPortId(); |
| 60 | this.chassisId = lldp.getChassisId(); |
| 61 | this.ttl = lldp.getTtl(); |
| 62 | this.optionalTLVList = lldp.getOptionalTLVList(); |
| 63 | } |
| 64 | |
| 65 | public void setName(String name) { |
| 66 | nameTLV.setLength((short) (name.length() + NAME_LENGTH)); |
| 67 | nameTLV.setInfoString(name); |
| 68 | nameTLV.setSubType(NAME_SUBTYPE); |
| 69 | nameTLV.setOUI(ONLAB_OUI); |
| 70 | } |
| 71 | |
| 72 | public void setDevice(String device) { |
| 73 | deviceTLV.setInfoString(device); |
| 74 | deviceTLV.setLength((short) (device.length() + DEVICE_LENGTH)); |
| 75 | deviceTLV.setSubType(DEVICE_SUBTYPE); |
| 76 | deviceTLV.setOUI(ONLAB_OUI); |
| 77 | } |
| 78 | |
| 79 | public void setChassisId(final ChassisId chassisId) { |
| 80 | MacAddress chassisMac = MacAddress.valueOf(chassisId.value()); |
| 81 | byte[] chassis = ArrayUtils.addAll(new byte[] {CHASSIS_TLV_SUBTYPE}, |
| 82 | chassisMac.getAddress()); |
| 83 | |
| 84 | LLDPTLV chassisTLV = new LLDPTLV(); |
| 85 | chassisTLV.setLength(CHASSIS_TLV_SIZE); |
| 86 | chassisTLV.setType(CHASSIS_TLV_TYPE); |
| 87 | chassisTLV.setValue(chassis); |
| 88 | this.setChassisId(chassisTLV); |
| 89 | } |
| 90 | |
| 91 | public void setPortId(final int portNumber) { |
| 92 | byte[] port = ArrayUtils.addAll(new byte[] {PORT_TLV_SUBTYPE}, |
| 93 | ByteBuffer.allocate(4).putInt(portNumber).array()); |
| 94 | |
| 95 | LLDPTLV portTLV = new LLDPTLV(); |
| 96 | portTLV.setLength(PORT_TLV_SIZE); |
| 97 | portTLV.setType(PORT_TLV_TYPE); |
| 98 | portTLV.setValue(port); |
| 99 | this.setPortId(portTLV); |
| 100 | } |
| 101 | |
| 102 | public LLDPOrganizationalTLV getNameTLV() { |
| 103 | for (LLDPTLV tlv : this.getOptionalTLVList()) { |
| 104 | if (tlv.getType() == LLDPOrganizationalTLV.ORGANIZATIONAL_TLV_TYPE) { |
| 105 | LLDPOrganizationalTLV orgTLV = (LLDPOrganizationalTLV) tlv; |
| 106 | if (orgTLV.getSubType() == NAME_SUBTYPE) { |
| 107 | return orgTLV; |
| 108 | } |
| 109 | } |
| 110 | } |
| 111 | return null; |
| 112 | } |
| 113 | |
| 114 | public LLDPOrganizationalTLV getDeviceTLV() { |
| 115 | for (LLDPTLV tlv : this.getOptionalTLVList()) { |
| 116 | if (tlv.getType() == LLDPOrganizationalTLV.ORGANIZATIONAL_TLV_TYPE) { |
| 117 | LLDPOrganizationalTLV orgTLV = (LLDPOrganizationalTLV) tlv; |
| 118 | if (orgTLV.getSubType() == DEVICE_SUBTYPE) { |
| 119 | return orgTLV; |
| 120 | } |
| 121 | } |
| 122 | } |
| 123 | return null; |
| 124 | } |
| 125 | |
| 126 | public String getNameString() { |
| 127 | LLDPOrganizationalTLV tlv = getNameTLV(); |
| 128 | if (tlv != null) { |
| 129 | return new String(tlv.getInfoString()); |
| 130 | } |
| 131 | return null; |
| 132 | } |
| 133 | |
| 134 | public String getDeviceString() { |
| 135 | LLDPOrganizationalTLV tlv = getDeviceTLV(); |
| 136 | if (tlv != null) { |
| 137 | return new String(tlv.getInfoString()); |
| 138 | } |
| 139 | return null; |
| 140 | } |
| 141 | |
| 142 | public Integer getPort() { |
| 143 | ByteBuffer portBB = ByteBuffer.wrap(this.getPortId().getValue()); |
| 144 | portBB.position(1); |
| 145 | return portBB.getInt(); |
| 146 | } |
| 147 | |
| 148 | /** |
| 149 | * Given an ethernet packet, determines if this is an LLDP from |
| 150 | * ONOS and returns the device the LLDP came from. |
| 151 | * @param eth an ethernet packet |
| 152 | * @return a the lldp packet or null |
| 153 | */ |
| 154 | public static ONOSLLDP parseONOSLLDP(Ethernet eth) { |
| 155 | if (eth.getEtherType() == Ethernet.TYPE_LLDP || |
| 156 | eth.getEtherType() == Ethernet.TYPE_BSN) { |
| 157 | ONOSLLDP onosLldp = new ONOSLLDP((LLDP) eth.getPayload()); //(ONOSLLDP) eth.getPayload(); |
| 158 | if (ONOSLLDP.DEFAULT_NAME.equals(onosLldp.getNameString())) { |
| 159 | return onosLldp; |
| 160 | } |
| 161 | } |
| 162 | return null; |
| 163 | } |
| 164 | |
| 165 | |
| 166 | |
| 167 | |
| 168 | |
| 169 | } |