Method decode

src/main/java/io/DnsSrvResolver.java:202–258

(byte[] response)

    }
    
    private Vector decode (byte[] response) {
        try {
            ByteArrayInputStream bais = new ByteArrayInputStream(response);
            DataInputStream in = new DataInputStream(bais);
            short id = in.readShort(); // id
            short flags = in.readShort(); // flags
            short questions = in.readShort();
            int answers = in.readShort();
            in.readShort();
            in.readShort(); 
            for (int i = 0; i < questions; ++i) {
                while (true) {
                    int length = in.readUnsignedByte();
                    if (0 == length) break;
                    for (int j = 0; j < length; ++j) {
                        in.readUnsignedByte();
                    }
                }
                in.readShort();
                in.readShort();
            }
            Vector res = new Vector();
            for (int i = 0; i < answers; ++i) {
                in.readUnsignedShort(); // ...
                int type = in.readUnsignedShort(); // type
                in.readUnsignedShort(); // class
                int ttl = in.readInt(); // ttl
                int rdlength = in.readUnsignedShort(); // length
                if (type == 0x0021) {
                    // SRV
                    in.readUnsignedShort();
                    in.readUnsignedShort();
                    int port = in.readUnsignedShort(); // port
                    StringBuffer result = new StringBuffer();
                    while (true) {
                        int length = in.readUnsignedByte();
                        if (0 == length) break;
                        for (int j = 0; j < length; ++j) {
                            result.append((char) in.readUnsignedByte());
                        }
                        result.append('.');
                    }
                    if (443 == port) {
                        port = 5222;
                    }
                    SrvRdata item = new SrvRdata();
                    item.host = result.toString().substring(0, result.length() - 1);
                    item.port = port;
                    item.ttl = ttl;
                    res.addElement(item);
                }
            } 
            return res;
        } catch (IOException ex) {
            return null;
        }
    }