/// <summary>
/// 对短信内容进行编码
/// </summary>
/// <param name="DCS"></param>
/// <param name="content"></param>
/// <returns></returns>
private string GetUDDecoding(string PDUType, string DCS, string content)
{
string pduBitType = Convert.ToString(int.Parse(PDUType[0].ToString()), 2).PadLeft(4, '0') +
Convert.ToString(int.Parse(PDUType[1].ToString()), 2).PadLeft(4, '0');
if (pduBitType[1].ToString() == "1") //即pdu二进制传的UDHI位为1 表示是超长短信
{
int pduHeadLen = Convert.ToInt32(content.Substring(0, 2), 16); //pdu头部长度有的是6有的是7大部分是6，这个长度表示后面还有几个字节的头部位
content = content.Substring(2 + pduHeadLen * 2);
}
string encodeContent = "";
switch (DCS)
{
case "00":
encodeContent = CodingHelper.DecodingBit7(content);
break;
case "F6":
encodeContent = CodingHelper.DecodingBit8(content);
break;
case "08":
encodeContent = CodingHelper.DecodingUcs2(content);
break;
default:
encodeContent = CodingHelper.DecodingUcs2(content);
break;
}
return(encodeContent);
}
/// <summary>
/// 解码短信内容,如:
/// 0891
/// 683108100005F0
///44
///05
///A1
///0180F6
///000890709001821423
///8C
///0500030A0201
///8BF756DE590D5E8F53F7000A0031002E8BDD8D3979EF5206000A0032002E670065B04F1860E0000A0033002E4E1A52A1529E7406000A0034002E68A67F515B9A5236000A0035002E595799104E1A52A1000A0036002E5E3875
///284FE1606F000A4E2D56FD79FB52A853174EAC516C53F8002000200020002000200020621656DE59
///0D5B576BCD
/// </summary>
/// <param name="smsContent"></param>
/// <returns></returns>
public SmsInfo DecodingSMS(string smsContent)
{
var info = new SmsInfo();
info.SCALen = smsContent.Substring(0, 2);
info.SCAType = smsContent.Substring(2, 2);
int SCALen = Convert.ToInt32(info.SCALen, 16);
info.SCAAddr = CodingHelper.DecodingMobileNum(smsContent.Substring(4, (SCALen - 1) * 2), info.SCAType);
info.PDUType = smsContent.Substring((SCALen + 1) * 2, 2);
info.OALen = smsContent.Substring((SCALen + 1) * 2 + 2, 2);
int OALen = Convert.ToInt32(info.OALen, 16);
info.OAType = smsContent.Substring((SCALen + 1) * 2 + 2 + 2, 2);
info.OAAddr = CodingHelper.DecodingMobileNum(smsContent.Substring((SCALen + 1) * 2 + 2 + 2 + 2, OALen + 1),
info.OAType);
info.PID = smsContent.Substring((SCALen + 1) * 2 + 2 + 2 + 2 + (OALen + 1), 2);
info.DCS = smsContent.Substring((SCALen + 1) * 2 + 2 + 2 + 2 + (OALen + 1) + 2, 2);
info.SCTS =
CodingHelper.DecodingTime(smsContent.Substring((SCALen + 1) * 2 + 2 + 2 + 2 + (OALen + 1) + 2 + 2, 14)).
ToString("yyyy-MM-dd HH:mm:ss");
info.UDL = smsContent.Substring((SCALen + 1) * 2 + 2 + 2 + 2 + (OALen + 1) + 2 + 2 + 14, 2);
info.UD = GetUDDecoding(info.PDUType, info.DCS,
smsContent.Substring((SCALen + 1) * 2 + 2 + 2 + 2 + (OALen + 1) + 2 + 2 + 14 + 2));
return(info);
}
/// <summary>
/// 编码要发送的内容
/// 通过调用CodingHelper中的函数按照如下格式组成编码:SCA + PDUType + MR + DA + PID + DCS + VP + (UDL + UD)
/// </summary>
/// <returns>要发送的内容</returns>
public String EncodingSMS(out int SMSLen)
{
int VPLen = 0;
string SCA = CodingHelper.EncodingMobileNum(SCAAddr, SCAType, true);
string DA = CodingHelper.EncodingMobileNum(DAAddr, DAType, false);
string UDContent = GetUDEncoding(PDUType, DCS, UD);
string encodeSMS = SCA + PDUType + MR + DA + PID + DCS + GetVP(PDUType, 1, out VPLen) + UDContent;
//短信长度，即短信中心号码后的长度用十进制表示 0891683108100005F0 1100 0B 813141968548F1 00 0810020041
// 0891683108100005F0 1000 08 91683141968548F1 00 08 A7044E2D6587
//0891683108100005F0 24 00 08 91683141968548F1 00 08 907041619580 80 044E2D6587
//0891683108100005F0 11 00 0D 91683141968548F1 00 08 00 044E2D6587
SMSLen = 2 + DA.Length / 2 + 2 + VPLen + UDContent.Length / 2; //说明: 2（PDUType和MR的长度）+DA的长度+2（PID和DCS的长度）+VP的长度
return(encodeSMS);
}
/// <summary>
/// 根据PDUType确定有效期是使用相对格式还是绝对格式
/// </summary>
/// <param name="PDUType">PDUType串第4和3两位确定有效期的格式
/// Bit No. 7 6 5 4 3 2 1 0
/// 0 0 0 0 0 0 0 0
/// VPF： 有效期格式（Validity Period Format），
/// 00 – VP 段没有提供（长度为 0 ），
/// 01 – 保留， ///
/// 10 – VP 段以整型形式提供（相对的），
/// 11 – VP 段以8位组的一半(semi-octet)形式提供（绝对的）
/// </param>
/// <param name="VPDays">有效期的天数,0-7</param>
/// <returns></returns>
private string GetVP(string PDUType, int VPDays, out int vpLen)
{
string pduBitType = Convert.ToString(int.Parse(PDUType[0].ToString()), 2).PadLeft(4, '0') +
Convert.ToString(int.Parse(PDUType[1].ToString()), 2).PadLeft(4, '0');
string vp = "";
vpLen = 1;
switch (pduBitType[3] + pduBitType[4].ToString())
{
case "10":
vpLen = 1;
if (VPDays <= 0)
{
vp = "00";
}
else
{
if (VPDays < 8)
{
int days = VPDays + 166;
vp = days.ToString("X2");
}
else
{
vp = "00";
}
}
break;
case "11":
vpLen = 7;
vp = CodingHelper.EncodingTime(DateTime.Now.AddDays(VPDays));
break;
default:
vpLen = 0;
vp = "";
break;
}
return(vp);
}
