| 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 FTSPacket extends GeneralTTPHeader { |
| 13 | |
| 14 | private long LMSseqNumber; |
| 15 | |
| 16 | private long sessionSize; |
| 17 | |
| 18 | private long increaseFactor; |
| 19 | |
| 20 | private long reservedEnd; |
| 21 | |
| 22 | public FTSPacket() { |
| 23 | super(5); |
| 24 | } |
| 25 | |
| 26 | private Vector<FTSGroupBlock> groupList = new Vector<FTSGroupBlock>(); |
| 27 | |
| 28 | public void addGroupBlock(FTSGroupBlock group) { |
| 29 | groupList.add(group); |
| 30 | } |
| 31 | |
| 32 | public FTSGroupBlock getGroupBlock(int index) { |
| 33 | |
| 34 | return groupList.get(index); |
| 35 | } |
| 36 | |
| 37 | /** |
| 38 | * Generate buffer of values in FTS header. <i>This method generates |
| 39 | * specific size of bytes into the buffer.</i> |
| 40 | * |
| 41 | * @param resultArray - |
| 42 | * memory bytes for generating buffer |
| 43 | * @param startPos - |
| 44 | * starting position in resultArray |
| 45 | */ |
| 46 | @Override |
| 47 | public int generate(byte[] resultArray, int startPos) |
| 48 | throws PacketGenerateException { |
| 49 | int length = super.generate(resultArray, startPos); |
| 50 | length += generateRestFTS(resultArray, startPos + length); |
| 51 | return length; |
| 52 | } |
| 53 | |
| 54 | private int generateRestFTS(byte[] buffer, int offset) throws PacketGenerateException { |
| 55 | |
| 56 | assert PacketUtils.checkSize(this.getLMSseqNumber(), 32); |
| 57 | assert PacketUtils.checkSize(this.getSessionSize(), 32); |
| 58 | assert PacketUtils.checkSize(this.getIncreaseFactor(), 16); |
| 59 | assert PacketUtils.checkSize(this.getReservedEnd(), 16); |
| 60 | |
| 61 | // adding LMS sequence number |
| 62 | PacketUtils.setOctet4(buffer, offset, this.getLMSseqNumber()); |
| 63 | // adding session size |
| 64 | PacketUtils.setOctet4(buffer, offset + 4, this.getSessionSize()); |
| 65 | // adding increase factor |
| 66 | PacketUtils.setOctet2(buffer, offset + 8, this.getIncreaseFactor()); |
| 67 | // adding ReservedEnd |
| 68 | PacketUtils.setOctet2(buffer, offset + 10, this.getReservedEnd()); |
| 69 | // adding Vector of IP addresses |
| 70 | |
| 71 | int len = 12; |
| 72 | for (FTSGroupBlock group : groupList) { |
| 73 | len += group.generate(buffer, offset+len); |
| 74 | } |
| 75 | |
| 76 | // zbytek hlavicky zabere celkem ... bitu |
| 77 | return len; |
| 78 | } |
| 79 | |
| 80 | /** |
| 81 | * Parsing FTS header values from buffer. <i>This method takes specific |
| 82 | * number of bytes from buffer and parse them into FTS header values. </i> |
| 83 | * |
| 84 | * @param resultArray - |
| 85 | * memory bytes for parsing the values |
| 86 | * @param startPos - |
| 87 | * starting position in resultArray |
| 88 | * @param length - |
| 89 | * length of header |
| 90 | */ |
| 91 | @Override |
| 92 | public int parse(byte[] resultArray, int startPos, int length) |
| 93 | throws PacketParseException { |
| 94 | int len = super.parse(resultArray, startPos, length); |
| 95 | len += this.parseRestFTS(resultArray, startPos, length); |
| 96 | return len; |
| 97 | } |
| 98 | |
| 99 | private int parseRestFTS(byte[] buffer, int offset, int length) |
| 100 | throws PacketParseException { |
| 101 | this.setLMSseqNumber(PacketUtils.getOctet4(buffer, 4 + offset)); |
| 102 | this.setSessionSize(PacketUtils.getOctet4(buffer, 8 + offset)); |
| 103 | this.setIncreaseFactor(PacketUtils.getOctet2(buffer, 12 + offset)); |
| 104 | this.setReservedEnd(PacketUtils.getOctet2(buffer, 14 + offset)); |
| 105 | int len = 12; |
| 106 | for (int i = 0; i < ((length - 12) / 16); i++) { |
| 107 | FTSGroupBlock item = new FTSGroupBlock(); |
| 108 | len += item.parse(buffer, offset + len, length); |
| 109 | this.addGroupBlock(item); |
| 110 | } |
| 111 | return len; |
| 112 | } |
| 113 | |
| 114 | public long getLMSseqNumber() { |
| 115 | return LMSseqNumber; |
| 116 | } |
| 117 | |
| 118 | public void setLMSseqNumber(long sseqNumber) { |
| 119 | LMSseqNumber = sseqNumber; |
| 120 | } |
| 121 | |
| 122 | public long getSessionSize() { |
| 123 | return sessionSize; |
| 124 | } |
| 125 | |
| 126 | public void setSessionSize(long sessionSize) { |
| 127 | this.sessionSize = sessionSize; |
| 128 | } |
| 129 | |
| 130 | public long getIncreaseFactor() { |
| 131 | return increaseFactor; |
| 132 | } |
| 133 | |
| 134 | public void setIncreaseFactor(long increaseFactor) { |
| 135 | this.increaseFactor = increaseFactor; |
| 136 | } |
| 137 | |
| 138 | public long getReservedEnd() { |
| 139 | return reservedEnd; |
| 140 | } |
| 141 | |
| 142 | public void setReservedEnd(long reservedEnd) { |
| 143 | this.reservedEnd = reservedEnd; |
| 144 | } |
| 145 | |
| 146 | /** |
| 147 | * @see java.lang.Object#toString() |
| 148 | */ |
| 149 | public String toString() { |
| 150 | return new ToStringBuilder(this).append("version", this.getVersion()) |
| 151 | .append("padding", this.getPadding()).append("reservedEnd", |
| 152 | this.reservedEnd).append("sessionSize", |
| 153 | this.sessionSize).append("packetType", |
| 154 | this.getPacketType()).append("LMSseqNumber", |
| 155 | this.LMSseqNumber).append("length", this.getLength()) |
| 156 | .append("increaseFactor", this.increaseFactor).append( |
| 157 | "feedbackTreeId", this.getFeedbackTreeId()).toString(); |
| 158 | } |
| 159 | |
| 160 | /** |
| 161 | * @see java.lang.Object#equals(Object) |
| 162 | */ |
| 163 | public boolean equals(Object object) { |
| 164 | if (!(object instanceof FTSPacket)) { |
| 165 | return false; |
| 166 | } |
| 167 | FTSPacket rhs = (FTSPacket) object; |
| 168 | return new EqualsBuilder().appendSuper(super.equals(object)).append( |
| 169 | this.groupList, rhs.groupList).append(this.increaseFactor, |
| 170 | rhs.increaseFactor).append(this.sessionSize, rhs.sessionSize) |
| 171 | .append(this.LMSseqNumber, rhs.LMSseqNumber).append( |
| 172 | this.reservedEnd, rhs.reservedEnd).isEquals(); |
| 173 | } |
| 174 | |
| 175 | /** |
| 176 | * @see java.lang.Object#hashCode() |
| 177 | */ |
| 178 | public int hashCode() { |
| 179 | return new HashCodeBuilder(-1169663993, -969153201).append(this.groupList).append( |
| 180 | this.increaseFactor).append(this.sessionSize).append( |
| 181 | this.LMSseqNumber).append(this.reservedEnd).toHashCode(); |
| 182 | } |
| 183 | |
| 184 | } |