/// <summary>
/// Method adds `Concat` information into the User Header
/// </summary>
/// <param name="udhStruct">stucture representing the </param>
/// <param name="messageUDH">message user header</param>
private byte[] GetConcatPdu(ConcatedUDH udhStruct, byte[] messageUDH)
{
const byte CONCATED_UDH_DATA_LENGTH = 0x06;
using (var stream = new MemoryStream())
{
// If we have message for concating, write concating header
if (udhStruct.Parts > 1)
{
stream.WriteByte((byte)(CONCATED_UDH_DATA_LENGTH + messageUDH.Length));
stream.WriteByte(PDU_UDH_CONCATED_MESSAGE_16BIT);
stream.WriteByte(PDU_UDH_CONCATED_MESSAGE_16BIT_HEADERLENGTH);
stream.WriteByte((byte)(udhStruct.Reference >> 8));
stream.WriteByte((byte)udhStruct.Reference);
stream.WriteByte(udhStruct.Parts);
stream.WriteByte(udhStruct.Sequence);
}
// if we have some messageuUDH, write the header length
else if (messageUDH.Length > 0)
{
stream.WriteByte((byte)messageUDH.Length);
}
stream.Write(messageUDH, 0, messageUDH.Length);
return(stream.ToArray());
}
}
/// <summary>
/// Method adds `Concat` information into the User Header
/// </summary>
/// <param name="udhStruct">stucture representing the </param>
/// <param name="messageUDH">message user header</param>
private byte[] GetConcatPdu(ConcatedUDH udhStruct, byte[] messageUDH)
{
MemoryStream stream = new MemoryStream();
// If we have message for concating, write concating header
if (udhStruct.Parts > 1)
{
MemoryStream concatHeader = new MemoryStream();
concatHeader.WriteByte(PDU_UDH_CONCATED_MESSAGE_16BIT);
concatHeader.WriteByte(PDU_UDH_CONCATED_MESSAGE_16BIT_HEADERLENGTH);
concatHeader.WriteByte((byte)(udhStruct.Reference >> 8));
concatHeader.WriteByte((byte)udhStruct.Reference);
concatHeader.WriteByte(udhStruct.Parts);
concatHeader.WriteByte(udhStruct.Sequence);
stream.WriteByte((byte)(concatHeader.Length + messageUDH.Length));
concatHeader.WriteTo(stream);
}
// if we have some messageuUDH, write the header length
else if (messageUDH.Length > 0)
stream.WriteByte((byte)messageUDH.Length);
stream.Write(messageUDH, 0, messageUDH.Length);
return stream.ToArray();
}
/// <summary>
/// Method returns list of PDU formated messages.
/// If data fits into one message than the list has only one item.
/// Otherwise the data is concated into more messages.
/// </summary>
/// <returns></returns>
public List <byte[]> GetPDUList()
{
int maxOctetsCount;
switch (MessageToSend.DataEncoding)
{
case DataEncoding.Default7bit:
maxOctetsCount = 160;
break;
case DataEncoding.Data8bit:
maxOctetsCount = 140; // Might be lower, some roaming partners don't like it when set to 140
break;
case DataEncoding.UCS2_16bit:
maxOctetsCount = 140;
break;
default:
maxOctetsCount = 140;
break;
}
byte[] body = MessageToSend.GetSMSBytes();
byte[] messageUdh = MessageToSend.GetUDHBytes();
// If UDH exists then reserve one more byte for UDH length
int maxLen = maxOctetsCount - messageUdh.Length;
maxLen -= (messageUdh.Length > 0) ? 1 : 0;
// Count parts
int parts = (int)Math.Ceiling((double)body.Length / (double)maxLen);
parts = (int)Math.Ceiling((double)(body.Length + parts * messageUdh.Length) / (double)maxLen);
if (parts > 1)
{
parts = (int)Math.Ceiling((double)(body.Length + parts * messageUdh.Length + parts * (CONCATED_UDH_FULL_LENGTH + 1)) / (double)maxLen);
}
List <byte[]> messagePart = new List <byte[]>();
byte[] udhByteArray;
byte[] messageByteArray;
ConcatedUDH conUDH = new ConcatedUDH();
// This will hold the byteCount send in message (without UDH)
int bytesCount = maxOctetsCount;
// Thiis will hold the position in the message array
int messagePos = 0;
if (parts > 1)
{
conUDH.Reference = 01;
conUDH.Parts = (byte)parts;
for (int i = 0; i < parts; i++)
{
conUDH.Sequence = (byte)(i + 1);
udhByteArray = GetConcatPdu(conUDH, messageUdh);
// if it's not last message then
if (i < (parts - 1))
{
bytesCount = maxOctetsCount - udhByteArray.Length - 1;
}
else
{
bytesCount = body.Length - messagePos;
}
byte[] bodyPart = new byte[bytesCount];
Array.Copy(body, messagePos, bodyPart, 0, bytesCount);
// Encode message with given encoding
byte[] encodedBody = GetEncodedMessage(bodyPart);
// Takes the message length before encoding
int messageLength = (bodyPart.Length) + udhByteArray.Length;
// There is a align in 7bit encoding
if (MessageToSend.DataEncoding == DataEncoding.Default7bit)
{
messageLength++;
}
//creates message
messageByteArray = new byte[encodedBody.Length + udhByteArray.Length];
Array.Copy(udhByteArray, messageByteArray, udhByteArray.Length);
Array.Copy(encodedBody, 0, messageByteArray, udhByteArray.Length, encodedBody.Length);
messagePos += bytesCount;
messageByteArray = GetPDUBytes(messageByteArray, messageLength, (udhByteArray.Length > 0));
messagePart.Add(messageByteArray);
}
}
else
{
conUDH.Parts = 1;
udhByteArray = GetConcatPdu(conUDH, messageUdh);
// Encode body according to given Encoding :)
byte[] encodedBody = GetEncodedMessage(body);
// Takes the message length before encoding
int messageLength = (body.Length) + udhByteArray.Length;
messageByteArray = new byte[encodedBody.Length + udhByteArray.Length];
Array.Copy(udhByteArray, messageByteArray, udhByteArray.Length);
Array.Copy(encodedBody, 0, messageByteArray, udhByteArray.Length, encodedBody.Length);
messageByteArray = GetPDUBytes(messageByteArray, messageLength, (udhByteArray.Length > 0));
messagePart.Add(messageByteArray);
}
return(messagePart);
}
/// <summary>
/// Method returns list of PDU formated messages.
/// If data fits into one message than the list has only one item.
/// Otherwise the data is concated into more messages.
/// </summary>
/// <returns></returns>
public List<byte[]> GetPDUList()
{
int maxOctetsCount;
switch (MessageToSend.DataEncoding)
{
case DataEncoding.Default7bit:
maxOctetsCount = 160;
break;
case DataEncoding.Data8bit:
maxOctetsCount = 140; // Might be lower, some roaming partners don't like it when set to 140
break;
case DataEncoding.UCS2_16bit:
maxOctetsCount = 140;
break;
default:
maxOctetsCount = 140;
break;
}
byte[] body = MessageToSend.GetSMSBytes();
byte[] messageUdh = MessageToSend.GetUDHBytes();
// If UDH exists then reserve one more byte for UDH length
int maxLen = maxOctetsCount - messageUdh.Length;
maxLen -= (messageUdh.Length > 0) ? 1 : 0;
// Count parts
int parts = (int)Math.Ceiling((double)body.Length / (double)maxLen);
parts = (int)Math.Ceiling((double)(body.Length + parts*messageUdh.Length) / (double)maxLen);
List<byte[]> messagePart = new List<byte[]>();
byte[] udhByteArray;
byte[] messageByteArray;
ConcatedUDH conUDH = new ConcatedUDH();
// This will hold the byteCount send in message (without UDH)
int bytesCount = maxOctetsCount;
// Thiis will hold the position in the message array
int messagePos = 0;
if (parts > 1)
{
conUDH.Reference = 01;
conUDH.Parts = (byte)parts;
for (int i = 0; i < parts; i++)
{
conUDH.Sequence = (byte)(i + 1);
udhByteArray = GetConcatPdu(conUDH, messageUdh);
// if it's not last message then
if (i < (parts - 1))
bytesCount = maxOctetsCount - udhByteArray.Length - 1;
else
bytesCount = body.Length - messagePos;
byte[] bodyPart = new byte[bytesCount];
Array.Copy(body, messagePos, bodyPart, 0, bytesCount);
// Encode message with given encoding
byte[] encodedBody = GetEncodedMessage(bodyPart);
// Takes the message length before encoding
int messageLength = (bodyPart.Length) + udhByteArray.Length;
// There is a align in 7bit encoding
if (MessageToSend.DataEncoding == DataEncoding.Default7bit)
messageLength++;
//creates message
messageByteArray = new byte[encodedBody.Length + udhByteArray.Length];
Array.Copy(udhByteArray, messageByteArray, udhByteArray.Length);
Array.Copy(encodedBody, 0, messageByteArray, udhByteArray.Length, encodedBody.Length);
messagePos += bytesCount;
messageByteArray = GetPDUBytes(messageByteArray, messageLength, (udhByteArray.Length > 0));
messagePart.Add(messageByteArray);
}
}
else
{
conUDH.Parts = 1;
udhByteArray = GetConcatPdu(conUDH, messageUdh);
// Encode body according to given Encoding :)
byte[] encodedBody = GetEncodedMessage(body);
// Takes the message length before encoding
int messageLength = (body.Length) + udhByteArray.Length;
messageByteArray = new byte[encodedBody.Length + udhByteArray.Length];
Array.Copy(udhByteArray, messageByteArray, udhByteArray.Length);
Array.Copy(encodedBody, 0, messageByteArray, udhByteArray.Length, encodedBody.Length);
messageByteArray = GetPDUBytes(messageByteArray, messageLength, (udhByteArray.Length > 0));
messagePart.Add(messageByteArray);
}
return messagePart;
}
