我正在使用名为EasySMPP的c＃API，它在发送单个短信方面相当不错，它也很好发送大型短信，但收件人分别收到邮件，这没有意义，我正在寻找的是如何修改PDU，以便我可以附加UDH信息。
如何添加UHD信息，这里是API的SubmitSM方法，
public int SubmitSM
(
byte sourceAddressTon,
byte sourceAddressNpi,
string sourceAddress,
byte destinationAddressTon,
byte destinationAddressNpi,
destinationAddress,
byte esmClass,
byte protocolId,
byte priorityFlag,
DateTime sheduleDeliveryTime,
DateTime validityPeriod,
byte registeredDelivery,
byte replaceIfPresentFlag,
byte dataCoding,
byte smDefaultMsgId,
byte[] message)
{
try
{
byte[] _destination_addr;
byte[] _source_addr;
byte[] _SUBMIT_SM_PDU;
byte[] _shedule_delivery_time;
byte[] _validity_period;
int _sequence_number;
int pos;
byte _sm_length;
_SUBMIT_SM_PDU = new byte[KernelParameters.MaxPduSize];
////////////////////////////////////////////////////////////////////////////////////////////////
/// Start filling PDU
Tools.CopyIntToArray(0x00000004, _SUBMIT_SM_PDU, 4);
_sequence_number = smscArray.currentSMSC.SequenceNumber;
Tools.CopyIntToArray(_sequence_number, _SUBMIT_SM_PDU, 12);
pos = 16;
_SUBMIT_SM_PDU[pos] = 0x00; //service_type
pos += 1;
_SUBMIT_SM_PDU[pos] = sourceAddressTon;
pos += 1;
_SUBMIT_SM_PDU[pos] = sourceAddressNpi;
pos += 1;
_source_addr = Tools.ConvertStringToByteArray(Tools.GetString(sourceAddress, 20, ""));
Array.Copy(_source_addr, 0, _SUBMIT_SM_PDU, pos, _source_addr.Length);
pos += _source_addr.Length;
_SUBMIT_SM_PDU[pos] = 0x00;
pos += 1;
_SUBMIT_SM_PDU[pos] = destinationAddressTon;
pos += 1;
_SUBMIT_SM_PDU[pos] = destinationAddressNpi;
pos += 1;
_destination_addr = Tools.ConvertStringToByteArray(Tools.GetString(destinationAddress, 20, ""));
Array.Copy(_destination_addr, 0, _SUBMIT_SM_PDU, pos, _destination_addr.Length);
pos += _destination_addr.Length;
_SUBMIT_SM_PDU[pos] = 0x00;
pos += 1;
_SUBMIT_SM_PDU[pos] = esmClass;
pos += 1;
_SUBMIT_SM_PDU[pos] = protocolId;
pos += 1;
_SUBMIT_SM_PDU[pos] = priorityFlag;
pos += 1;
_shedule_delivery_time = Tools.ConvertStringToByteArray(Tools.GetDateString(sheduleDeliveryTime));
Array.Copy(_shedule_delivery_time, 0, _SUBMIT_SM_PDU, pos, _shedule_delivery_time.Length);
pos += _shedule_delivery_time.Length;
_SUBMIT_SM_PDU[pos] = 0x00;
pos += 1;
_validity_period = Tools.ConvertStringToByteArray(Tools.GetDateString(validityPeriod));
Array.Copy(_validity_period, 0, _SUBMIT_SM_PDU, pos, _validity_period.Length);
pos += _validity_period.Length;
_SUBMIT_SM_PDU[pos] = 0x00;
pos += 1;
_SUBMIT_SM_PDU[pos] = registeredDelivery;
pos += 1;
_SUBMIT_SM_PDU[pos] = replaceIfPresentFlag;
pos += 1;
_SUBMIT_SM_PDU[pos] = dataCoding;
pos += 1;
_SUBMIT_SM_PDU[pos] = smDefaultMsgId;
pos += 1;
_sm_length = message.Length > 254 ? (byte)254 : (byte)message.Length;
_SUBMIT_SM_PDU[pos] = _sm_length;
pos += 1;
Array.Copy(message, 0, _SUBMIT_SM_PDU, pos, _sm_length);
pos += _sm_length;
Tools.CopyIntToArray(pos, _SUBMIT_SM_PDU, 0);
Send(_SUBMIT_SM_PDU, pos);
undeliveredMessages++;
return _sequence_number;
}
catch (Exception ex)
{
logMessage(LogLevels.LogExceptions, "SubmitSM | " + ex.ToString());
}
return -1;
}
非常感谢!!!!
答案 0 :(得分：0)
正如我所看到的，EasySMPP可以选择拆分长文本。
public int SendSms（String from，String to，bool splitLongText，String text，byte askDeliveryReceipt，byte esmClass，byte dataCoding）
否则，smpp协议也可以手动执行。 在SAR参数中：
SAR_MSG_REF_NUM - reference, unique to all sms parts
SAR_SEGMENT_SEQNUM - sequence number (1,2,3...)
SAR_TOTAL_SEGMENTS - number of all sequences
或者您可以封装在消息的开头 将UDHI设置为64
或者您可以在MESSAGE_PAYLOAD TLV中设置消息，SMSC将为您完成。
希望有所帮助
答案 1 :(得分：0)
以下是添加UDH的方法。
public int SendSms(String from, String to,
bool splitLongText, String text,
byte askDeliveryReceipt,
byte esmClass, byte dataCoding)
{
int messageId = -1;
byte sourceAddressTon;
byte sourceAddressNpi;
string sourceAddress;
byte destinationAddressTon;
byte destinationAddressNpi;
string destinationAddress;
byte registeredDelivery;
byte maxLength;
sourceAddress = Tools.GetString(from, 20, "");
sourceAddressTon = getAddrTon(sourceAddress);
sourceAddressNpi = getAddrNpi(sourceAddress);
destinationAddress = Tools.GetString(to, 20, "");
destinationAddressTon = getAddrTon(destinationAddress);
destinationAddressNpi = getAddrNpi(destinationAddress);
registeredDelivery = askDeliveryReceipt;
if (dataCoding == 8)
{
// text = Tools.Endian2UTF(text);
maxLength = 70;
}
else
maxLength = 160;
if ((text.Length <= maxLength) || (splitLongText))
{
byte protocolId;
byte priorityFlag;
DateTime sheduleDeliveryTime;
DateTime validityPeriod;
byte replaceIfPresentFlag;
byte smDefaultMsgId;
// byte[] message = new byte[146];
byte[] udh = new byte[6];
string smsText = text;
byte[] message;
protocolId = 0;
priorityFlag = PriorityFlags.VeryUrgent;
sheduleDeliveryTime = DateTime.MinValue;
validityPeriod = DateTime.MinValue;
replaceIfPresentFlag =
ReplaceIfPresentFlags.DoNotReplace;
smDefaultMsgId = 0;
if (dataCoding == 8)
{
message = new byte[70];
}
else
{
message = new byte[146];
}
string[] lists = dataCoding == 8 ?
split_message_unicode(text) :
split_message_asci(text);
int count = 1;
foreach (string s in lists)
{
Array.Clear(message, 0, message.Length);
// while (smsText.Length > 0)
// {
int pos = 0;
// byte desc = Convert.ToByte('c');
byte headerLen = Convert.ToByte(05);
byte concat = Convert.ToByte(00);
byte refNo = Convert.ToByte(03);
byte sequenceNo = Convert.ToByte(03);
byte NoOfMessages = Convert.ToByte(lists.Length);
byte partNo = Convert.ToByte(count);
count++;
udh[pos] = headerLen;
pos++;
udh[pos] = concat;
pos++;
udh[pos] = refNo;
pos++;
udh[pos] = sequenceNo;
pos++;
udh[pos] = NoOfMessages;
pos++;
udh[pos] = partNo;
pos++;
Array.Copy(udh, 0, message, 0, pos);
if (dataCoding == 8)
{
int len = Tools.GetEthiopic(s).Length;
Array.Copy(Tools.GetEthiopic(s), 0, message,
pos, len);
//message =
Tools.GetEthiopic(smsText.Substring(0, smsText.Length >
maxLength ? maxLength : smsText.Length));
//message =
Encoding.UTF8.GetBytes(smsText.Substring(0, smsText.Length >
maxLength ? maxLength : smsText.Length));
}
else{
// message = Encoding.ASCII.GetBytes(s);
Array.Copy(Encoding.ASCII.GetBytes(s), 0,
message, pos, Encoding.ASCII.GetBytes(s).Length);
}
smsText = smsText.Remove(0, smsText.Length >
maxLength ? maxLength : smsText.Length);
messageId = SubmitSM(sourceAddressTon,
sourceAddressNpi, sourceAddress,
destinationAddressTon,
destinationAddressNpi, destinationAddress,
esmClass, protocolId,
priorityFlag,
sheduleDeliveryTime,
validityPeriod, registeredDelivery, replaceIfPresentFlag,
dataCoding, smDefaultMsgId,
message);
// }
}
}
else
{
byte[] data;
if (dataCoding == 8)
data = Tools.GetEthiopic(text);
//data = Encoding.UTF8.GetBytes(text);
else
data = Encoding.ASCII.GetBytes(text);
messageId = DataSM(sourceAddressTon, sourceAddressNpi,
sourceAddress,
destinationAddressTon,
destinationAddressNpi, destinationAddress,
esmClass, registeredDelivery,
dataCoding, data);
}
return messageId;
}
将ems_class传递为0x40，您需要的只是将您的邮件拆分为部分，这里是拆分方法，
private string[] split_message_asci(string message)
{
int message_len = message.Length;
decimal val=(message.Length / 140m);
decimal parts = Math.Ceiling(val);
string[] strs = new string[(int)parts];
string str = string.Empty;
int interval=140;
int i =0;
int Count= 0;
while (i < message_len)
{
if (Count < (int)parts-1)
{
str = message.Substring(i, interval);
strs[Count] = str;
i += interval ;
}
else
{
str = message.Substring(i, message_len-i);
strs[Count] = str;
i += interval + 1;
}
Count++;
}
return strs;
}