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39 lines
1.3 KiB
Java
39 lines
1.3 KiB
Java
4 years ago
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// TFTPMessage.java (C) K. J. Turner 01/03/01
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// Trivial File Transfer Protocol message format
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package protocol; // protocol package
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import support.*; // protocol entity support
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public class TFTPMessage extends PDU { // protocol data unit format
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public TFTPMessage (String type, int seq) { // construct PDU type/seq
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super (type, seq); // use generic PDU constructor
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}
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public TFTPMessage (String type, String sdu) { // construct PDU type/SDU
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super (type, sdu); // use generic PDU constructor
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}
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public TFTPMessage ( // construct PDU type/seq/SDU
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String type, int seq, String sdu) {
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super(type, seq, sdu); // use generic PDU constructor
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}
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public String getLabel () { // get PDU "type(contents)"
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String label = type; // get PDU type
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if (seq >= 0) { // sequence number present?
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label += "(" + seq; // append sequence number
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if (sdu.equals ("")) // SDU absent?
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label += ")"; // finish contents
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else // SDU present
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label += "," + sdu + ")"; // append SDU, finish contents
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}
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else if (!sdu.equals ("")) // no seq no, SDU present?
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label += "(" + sdu + ")"; // append SDU
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return (label); // return PDU label
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}
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}
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