/// <summary>
/// Extracts the data from the given record and places it into the
/// given text RTD.
/// </summary>
/// <param name="record">The record containing the data.</param>
/// <param name="text">Where the data is placed.</param>
public static void ReadTextRtd(NdefRecord record, NdefTextRtd text)
{
byte[] buf = record.Payload;
if (IsBitSet(buf[0], 6))
{
return;
}
var langLen = (byte)(buf[0] & 0x3f);
var langBuf = new byte[langLen];
System.Buffer.BlockCopy(buf, 1, langBuf, 0, langLen);
text.Language=System.Text.Encoding.UTF8.GetString(langBuf, 0, langBuf.Length);
var textLen = buf.Length - 1 - langLen;
if (textLen <= 0)
{
return;
}
var textBuf = new byte[textLen];
System.Buffer.BlockCopy(buf, 1 + langLen, textBuf, 0, textLen);
if (IsBitSet(buf[0], 7))
{
text.Encoding = "UTF-16";
text.Text = System.Text.Encoding.Unicode.GetString(textBuf, 0, textBuf.Length);
}
else
{
text.Encoding = "UTF-8";
text.Text = System.Text.Encoding.UTF8.GetString(textBuf, 0, textBuf.Length);
}
}
/// <summary>
/// Resolves the type name format of the given record.
/// </summary>
/// <param name="record">NDEF record</param>
/// <returns>The type name format matching the given record.</returns>
static public string GetTypeNameFormat(NdefRecord record)
{
var typeName = "";
switch (record.Tnf)
{
case 0x00:
typeName = "empty";
break;
case 0x01:
typeName = "wkt";
break;
case 0x02:
typeName = "mimetype";
break;
case 0x03:
typeName = "absUri";
break;
case 0x04:
typeName = "ext";
break;
case 0x05:
typeName = "unknown";
break;
case 0x06:
typeName = "unchanged";
break;
case 0x07:
typeName = "reserved";
break;
default:
typeName = "error";
break;
}
return(typeName);
}
/// <summary>
/// Resolves the type name format of the given record.
/// </summary>
/// <param name="record">NDEF record</param>
/// <returns>The type name format matching the given record.</returns>
public static string GetTypeNameFormat(NdefRecord record)
{
var typeName = "";
switch (record.Tnf)
{
case 0x00:
typeName = "empty";
break;
case 0x01:
typeName = "wkt";
break;
case 0x02:
typeName = "mimetype";
break;
case 0x03:
typeName = "absUri";
break;
case 0x04:
typeName = "ext";
break;
case 0x05:
typeName = "unknown";
break;
case 0x06:
typeName = "unchanged";
break;
case 0x07:
typeName = "reserved";
break;
default:
typeName = "error";
break;
}
return typeName;
}
/// <summary>
/// Extracts the data from the given record and places it into the
/// given text RTD.
/// </summary>
/// <param name="record">The record containing the data.</param>
/// <param name="text">Where the data is placed.</param>
static public void ReadTextRtd(NdefRecord record, NdefTextRtd text)
{
byte[] buf = record.Payload;
if (IsBitSet(buf[0], 6))
{
return;
}
var langLen = (byte)(buf[0] & 0x3f);
var langBuf = new byte[langLen];
System.Buffer.BlockCopy(buf, 1, langBuf, 0, langLen);
text.Language = System.Text.Encoding.UTF8.GetString(langBuf, 0, langBuf.Length);
var textLen = buf.Length - 1 - langLen;
if (textLen <= 0)
{
return;
}
var textBuf = new byte[textLen];
System.Buffer.BlockCopy(buf, 1 + langLen, textBuf, 0, textLen);
if (IsBitSet(buf[0], 7))
{
text.Encoding = "UTF-16";
text.Text = System.Text.Encoding.Unicode.GetString(textBuf, 0, textBuf.Length);
}
else
{
text.Encoding = "UTF-8";
text.Text = System.Text.Encoding.UTF8.GetString(textBuf, 0, textBuf.Length);
}
}
/// <summary>
/// Creates NDEF records based on the data in the given buffer.
/// </summary>
/// <param name="buf">The data buffer as input.</param>
/// <param name="list">The list of new NDEF records as output.</param>
/// <param name="isFirstRecordSp">Defines whether the first record is smart poster or not.</param>
private static void ReadNdefRecord(DataReader buf, List<NdefRecord> list, bool isFirstRecordSp)
{
var record = new NdefRecord();
byte header = buf.ReadByte();
record.Mb = IsBitSet(header, 7);
record.Me = IsBitSet(header, 6);
record.Cf = IsBitSet(header, 5);
record.Sr = IsBitSet(header, 4);
record.Il = IsBitSet(header, 3);
record.Tnf = (byte)(header & 0x07);
record.TypeLength = buf.ReadByte();
record.IsSpRecord = isFirstRecordSp;
if (record.Il)
{
record.IdLength = buf.ReadByte();
}
else
{
record.IdLength = 0;
}
if (record.Sr)
{
record.PayloadLength = buf.ReadByte();
}
else
{
var lengthBuf = new byte[4];
buf.ReadBytes(lengthBuf);
record.PayloadLength = BitConverter.ToUInt32(lengthBuf, 0);
}
if (record.TypeLength > 0)
{
record.Type = new byte[record.TypeLength];
buf.ReadBytes(record.Type);
}
if ((record.Il) && (record.IdLength > 0))
{
record.Id = new byte[record.IdLength];
buf.ReadBytes(record.Id);
}
if (record.PayloadLength > 0)
{
if ((record.Tnf == 0x01)
&& (System.Text.Encoding.UTF8.GetString(record.Type, 0, record.TypeLength) == "Sp"))
{
ReadNdefRecord(buf, list, true);
record.Payload = null;
}
else
{
record.Payload = new byte[record.PayloadLength];
buf.ReadBytes(record.Payload);
}
}
list.Add(record);
if (!record.Me)
{
ReadNdefRecord(buf, list, isFirstRecordSp);
}
}
/// <summary>
/// Extracts the data from the given record and places it into the
/// given URI RTD.
/// </summary>
/// <param name="record">The record containing the URI data.</param>
/// <param name="uri">Where the data is placed.</param>
public static void ReadUriRtd(NdefRecord record, NdefUriRtd uri)
{
byte[] buf = record.Payload;
uri.Identifier = GetUriIdentifier(buf[0]);
uri.Uri= System.Text.Encoding.UTF8.GetString(buf, 1, buf.Length-1);
}
/// <summary>
/// Parses the details from the given message. The output is a string
/// that can be appended into the log.
/// </summary>
/// <param name="message">The message to parse.</param>
/// <returns>The parsed details as a string.</returns>
private string ParseNDEF(ProximityMessage message)
{
var output = "";
using (var buf = DataReader.FromBuffer(message.Data)) {
NdefRecordUtility.ReadNdefRecord(buf, recordList);
for (int i = 0, recordNumber = 0, spRecordNumber = 0; i < recordList.Count; i++)
{
NdefRecord record = recordList.ElementAt(i);
if (!record.IsSpRecord)
{
if (System.Text.Encoding.UTF8.GetString(record.Type, 0, record.TypeLength) == "Sp")
{
output = output + "\n --End of Record No." + recordNumber; spRecordNumber = 0;
continue;
}
else
{
recordNumber++;
output = output + "\n --Record No." + recordNumber;
}
}
else
{
if (spRecordNumber == 0)
{
recordNumber++;
output = output + "\n --Record No." + recordNumber;
}
spRecordNumber++;
output = output + "\n Sp sub-record No." + spRecordNumber;
}
output = output + "\n MB:" + ((record.Mb) ? "1;" : "0;");
output = output + " ME:" + ((record.Me) ? "1;" : "0;");
output = output + " CF:" + ((record.Cf) ? "1;" : "0;");
output = output + " SR:" + ((record.Sr) ? "1;" : "0;");
output = output + " IL:" + ((record.Il) ? "1;" : "0;");
string typeName = NdefRecordUtility.GetTypeNameFormat(record);
if (record.TypeLength > 0)
{
output = output + "\n Type: " + typeName + ":"
+ System.Text.Encoding.UTF8.GetString(record.Type, 0, record.TypeLength);
}
if ((record.Il) && (record.IdLength > 0))
{
output = output + "\n Id:"
+ System.Text.Encoding.UTF8.GetString(record.Id, 0, record.IdLength);
}
if ((record.PayloadLength > 0) && (record.Payload != null))
{
if ((record.Tnf == 0x01) &&
(System.Text.Encoding.UTF8.GetString(record.Type, 0, record.TypeLength) == "U"))
{
NdefUriRtd uri = new NdefUriRtd();
NdefRecordUtility.ReadUriRtd(record, uri);
output = output + "\n Uri: " + uri.GetFullUri();
}
else if ((record.Tnf == 0x01) &&
(System.Text.Encoding.UTF8.GetString(record.Type, 0, record.TypeLength) == "T"))
{
NdefTextRtd text = new NdefTextRtd();
NdefRecordUtility.ReadTextRtd(record, text);
output = output + "\n Language: " + text.Language;
output = output + "\n Encoding: " + text.Encoding;
output = output + "\n Text: " + text.Text;
}
else
{
if (record.Tnf == 0x01)
{
output = output + "\n Payload:"
+ System.Text.Encoding.UTF8.GetString(record.Payload, 0, record.Payload.Length);
}
}
}
if (!record.IsSpRecord)
{
output = output + "\n --End of Record No." + recordNumber;
}
}
}
return(output);
}
/// <summary>
/// Extracts the data from the given record and places it into the
/// given URI RTD.
/// </summary>
/// <param name="record">The record containing the URI data.</param>
/// <param name="uri">Where the data is placed.</param>
static public void ReadUriRtd(NdefRecord record, NdefUriRtd uri)
{
byte[] buf = record.Payload;
uri.Identifier = GetUriIdentifier(buf[0]);
uri.Uri = System.Text.Encoding.UTF8.GetString(buf, 1, buf.Length - 1);
}
/// <summary>
/// Creates NDEF records based on the data in the given buffer.
/// </summary>
/// <param name="buf">The data buffer as input.</param>
/// <param name="list">The list of new NDEF records as output.</param>
/// <param name="isFirstRecordSp">Defines whether the first record is smart poster or not.</param>
static private void ReadNdefRecord(DataReader buf, List <NdefRecord> list, bool isFirstRecordSp)
{
var record = new NdefRecord();
byte header = buf.ReadByte();
record.Mb = IsBitSet(header, 7);
record.Me = IsBitSet(header, 6);
record.Cf = IsBitSet(header, 5);
record.Sr = IsBitSet(header, 4);
record.Il = IsBitSet(header, 3);
record.Tnf = (byte)(header & 0x07);
record.TypeLength = buf.ReadByte();
record.IsSpRecord = isFirstRecordSp;
if (record.Il)
{
record.IdLength = buf.ReadByte();
}
else
{
record.IdLength = 0;
}
if (record.Sr)
{
record.PayloadLength = buf.ReadByte();
}
else
{
var lengthBuf = new byte[4];
buf.ReadBytes(lengthBuf);
record.PayloadLength = BitConverter.ToUInt32(lengthBuf, 0);
}
if (record.TypeLength > 0)
{
record.Type = new byte[record.TypeLength];
buf.ReadBytes(record.Type);
}
if ((record.Il) && (record.IdLength > 0))
{
record.Id = new byte[record.IdLength];
buf.ReadBytes(record.Id);
}
if (record.PayloadLength > 0)
{
if ((record.Tnf == 0x01) &&
(System.Text.Encoding.UTF8.GetString(record.Type, 0, record.TypeLength) == "Sp"))
{
ReadNdefRecord(buf, list, true);
record.Payload = null;
}
else
{
record.Payload = new byte[record.PayloadLength];
buf.ReadBytes(record.Payload);
}
}
list.Add(record);
if (!record.Me)
{
ReadNdefRecord(buf, list, isFirstRecordSp);
}
}
