| 1 | package cz.vutbr.feec.packets.ttp; |
| 2 | |
| 3 | import java.util.Vector; |
| 4 | |
| 5 | import cz.vutbr.feec.packets.PacketGenerateException; |
| 6 | import cz.vutbr.feec.packets.PacketParseException; |
| 7 | import cz.vutbr.feec.packets.PacketUtils; |
| 8 | import org.apache.commons.lang.builder.ToStringBuilder; |
| 9 | import org.apache.commons.lang.builder.EqualsBuilder; |
| 10 | import org.apache.commons.lang.builder.HashCodeBuilder; |
| 11 | |
| 12 | public class LMSPacket extends GeneralTTPHeader { |
| 13 | |
| 14 | private long LSMseqNumber; |
| 15 | private long sessionSize; |
| 16 | private long increaseFactor; |
| 17 | private long reservedEnd; |
| 18 | |
| 19 | private Vector<LMSLandMarkGroup> groupList = new Vector<LMSLandMarkGroup>(); |
| 20 | |
| 21 | public void addGroupBlock(LMSLandMarkGroup item) { |
| 22 | groupList.add(item); |
| 23 | } |
| 24 | |
| 25 | public LMSLandMarkGroup getGroupBlock(int index) { |
| 26 | return groupList.get(index); |
| 27 | } |
| 28 | public LMSPacket() { |
| 29 | super(2); |
| 30 | } |
| 31 | /** |
| 32 | * Generate buffer of values in LMS header. <i>This method generates |
| 33 | * specific size of bytes into the buffer.</i> |
| 34 | * @param resultArray - memory bytes for generating buffer |
| 35 | * @param startPos - starting position in resultArray |
| 36 | */ |
| 37 | @Override |
| 38 | public int generate(byte[] resultArray, int startPos) |
| 39 | throws PacketGenerateException { |
| 40 | |
| 41 | int length = super.generate(resultArray, startPos); |
| 42 | length += generateRestLMS(resultArray, startPos + length); |
| 43 | |
| 44 | return length; |
| 45 | } |
| 46 | |
| 47 | private int generateRestLMS(byte[] buffer, int offset) throws PacketGenerateException { |
| 48 | |
| 49 | assert PacketUtils.checkSize(this.getLMSseqNumber(), 32); |
| 50 | assert PacketUtils.checkSize(this.getSessionSize(), 32); |
| 51 | assert PacketUtils.checkSize(this.getIncreaseFactor(), 16); |
| 52 | assert PacketUtils.checkSize(this.getReservedEnd(), 16); |
| 53 | |
| 54 | //adding LMS sequence number |
| 55 | PacketUtils.setOctet4(buffer, offset, this.getLMSseqNumber()); |
| 56 | |
| 57 | //adding session size |
| 58 | PacketUtils.setOctet4(buffer, offset+4, this.getSessionSize()); |
| 59 | |
| 60 | //adding increase factor |
| 61 | PacketUtils.setOctet2(buffer, offset+8, this.getIncreaseFactor()); |
| 62 | |
| 63 | //adding ReservedEnd |
| 64 | PacketUtils.setOctet2(buffer, offset+10, this.getReservedEnd()); |
| 65 | |
| 66 | //adding Vector of IP addresses |
| 67 | int len = 12; |
| 68 | for (LMSLandMarkGroup group : groupList) { |
| 69 | len += group.generate(buffer, offset+len); |
| 70 | } |
| 71 | // zbytek hlavicky zabere ... |
| 72 | return len; |
| 73 | } |
| 74 | /** |
| 75 | * Parsing LMS header values from buffer. <i>This method takes specific |
| 76 | * number of bytes from buffer and parse them into LMS header values. </i> |
| 77 | * @param resultArray - memory bytes for parsing the values |
| 78 | * @param startPos - starting position in resultArray |
| 79 | * @param length - length of header |
| 80 | */ |
| 81 | @Override |
| 82 | public int parse(byte[] resultArray, int startPos, int length) |
| 83 | throws PacketParseException { |
| 84 | int len = super.parse(resultArray, startPos, length); |
| 85 | len += this.parseRestLMS(resultArray, startPos+len, length); |
| 86 | return len; |
| 87 | } |
| 88 | |
| 89 | |
| 90 | private int parseRestLMS(byte[] buffer, int startPos, int length) throws PacketParseException{ |
| 91 | this.setLMSseqNumber(PacketUtils.getOctet4(buffer, 4 + startPos)); |
| 92 | this.setSessionSize(PacketUtils.getOctet4(buffer, 8 + startPos)); |
| 93 | this.setIncreaseFactor(PacketUtils.getOctet2(buffer, 12 + startPos)); |
| 94 | this.setReservedEnd(PacketUtils.getOctet2(buffer, 14 + startPos)); |
| 95 | int len = 12; |
| 96 | for (int i = 0; i < (length - 4*4)/4; i++) { |
| 97 | LMSLandMarkGroup item = new LMSLandMarkGroup(); |
| 98 | len += item.parse(buffer, startPos+len, length); |
| 99 | this.addGroupBlock(item); |
| 100 | } |
| 101 | return len; |
| 102 | } |
| 103 | public long getLMSseqNumber() { |
| 104 | return LSMseqNumber; |
| 105 | } |
| 106 | |
| 107 | public void setLMSseqNumber(long mseqNumber) { |
| 108 | LSMseqNumber = mseqNumber; |
| 109 | } |
| 110 | |
| 111 | public long getSessionSize() { |
| 112 | return sessionSize; |
| 113 | } |
| 114 | |
| 115 | public void setSessionSize(long sessionSize) { |
| 116 | this.sessionSize = sessionSize; |
| 117 | } |
| 118 | |
| 119 | public long getIncreaseFactor() { |
| 120 | return increaseFactor; |
| 121 | } |
| 122 | |
| 123 | public void setIncreaseFactor(long increaseFactor) { |
| 124 | this.increaseFactor = increaseFactor; |
| 125 | } |
| 126 | |
| 127 | public long getReservedEnd() { |
| 128 | return reservedEnd; |
| 129 | } |
| 130 | |
| 131 | public void setReservedEnd(long reservedEnd) { |
| 132 | this.reservedEnd = reservedEnd; |
| 133 | } |
| 134 | |
| 135 | /** |
| 136 | * @see java.lang.Object#toString() |
| 137 | */ |
| 138 | public String toString() { |
| 139 | return new ToStringBuilder(this).append("version", this.getVersion()) |
| 140 | .append("padding", this.getPadding()).append("reservedEnd", |
| 141 | this.reservedEnd).append("sessionSize", |
| 142 | this.sessionSize).append("LMSseqNumber", |
| 143 | this.getLMSseqNumber()).append("packetType", |
| 144 | this.getPacketType()) |
| 145 | .append("length", this.getLength()).append("increaseFactor", |
| 146 | this.increaseFactor).append("feedbackTreeId", |
| 147 | this.getFeedbackTreeId()).toString(); |
| 148 | } |
| 149 | |
| 150 | |
| 151 | /** |
| 152 | * @see java.lang.Object#hashCode() |
| 153 | */ |
| 154 | public int hashCode() { |
| 155 | return new HashCodeBuilder(-693280367, -1611599541).appendSuper( |
| 156 | super.hashCode()).append(this.groupList).append( |
| 157 | this.increaseFactor).append(this.sessionSize).append( |
| 158 | this.reservedEnd).append(this.LSMseqNumber).toHashCode(); |
| 159 | } |
| 160 | |
| 161 | /** |
| 162 | * @see java.lang.Object#equals(Object) |
| 163 | */ |
| 164 | public boolean equals(Object object) { |
| 165 | if (!(object instanceof LMSPacket)) { |
| 166 | return false; |
| 167 | } |
| 168 | LMSPacket rhs = (LMSPacket) object; |
| 169 | return new EqualsBuilder().appendSuper(super.equals(object)).append( |
| 170 | this.groupList, rhs.groupList).append(this.increaseFactor, |
| 171 | rhs.increaseFactor).append(this.sessionSize, rhs.sessionSize) |
| 172 | .append(this.reservedEnd, rhs.reservedEnd).append( |
| 173 | this.LSMseqNumber, rhs.LSMseqNumber).isEquals(); |
| 174 | } |
| 175 | } |