public override PDU AETitle(PDU pdu)
{
AETsBtoS(pdu);
if (uced == pced && ucing == pcing)
{
/*构造回复AC
* 1实例化新的AC类（保存配置信息）
* 2调用AC write，传入相应参数ACpdu，返回ACpdu
* 3调用AC.r
*
*/
AAssociateAC ACpdu = new AAssociateAC();
ACpdu.uCalledAET = pdu.uCalledAET;
ACpdu.uCallingAET = pdu.uCallingAET;
ACpdu.VItems = pdu.VItems;
ACpdu = ACpdu.writeAC(ACpdu);
pdu.r = ACpdu.r;
pdu.log = "DICOMSCU << A - ASSOCIATE - AC PDU" + "\r\n";
}
else if (uced != pced)
{
pdu.r = HexStringToByteArray("03 00 0000000A 00 02 03 07");
pdu.log = "DICOMSCU << A - ASSOCIATE - RJ PDU" + "\r\n";
}
else if (ucing != pcing)
{
pdu.r = HexStringToByteArray("03 00 0000000A 00 02 03 03");
pdu.log = "DICOMSCU << A - ASSOCIATE - RJ PDU" + "\r\n";
}
return(pdu);
}
//构造AC
public AAssociateAC writeAC(AAssociateAC ACpdu)
{
//构造AC头部
//type
ACpdu.PDUType = HexStringToByteArray("02");
// reserve1
byte[] reser1 = Vreserve(1);
//unkonw length
//version
ACpdu.ProtocalVersion = HexStringToByteArray("0001");
//reserve2
byte[] reser2 = Vreserve(2);
//called ACpdu.uCalledAET
//calling ACpdu.uCalledAET
//reserve32
byte[] reser32 = Vreserve(32);
//构造context
ACpdu = writeAPP(ACpdu);
ACpdu = writeAPer(ACpdu);
ACpdu = writeUInfo(ACpdu);
ACpdu.Context = new Byte[ACpdu.App.Length + ACpdu.Per.Length + ACpdu.UInfo.Length];
Array.Copy(ACpdu.App, 0, ACpdu.Context, 0, ACpdu.App.Length);
Array.Copy(ACpdu.Per, 0, ACpdu.Context, ACpdu.App.Length, ACpdu.Per.Length);
Array.Copy(ACpdu.UInfo, 0, ACpdu.Context, ACpdu.App.Length + ACpdu.Per.Length, ACpdu.UInfo.Length);
//获取长度，固定头部长度+上下文长度
ACpdu.PDULength = (uint)(68 + ACpdu.Context.Length);
//uint转换为byte数组，格式控制4byte
byte[] pdul = BitConverter.GetBytes(ACpdu.PDULength);
Array.Reverse(pdul);
ACpdu.r = new Byte[ACpdu.PDULength + 6];
//排序AC内容，存入r
int len = 0;
Array.Copy(ACpdu.PDUType, 0, r, len, ACpdu.PDUType.Length); len += ACpdu.PDUType.Length; //type
Array.Copy(reser1, 0, r, len, 1); len += 1; //re1
Array.Copy(pdul, 0, r, len, pdul.Length); len += pdul.Length; //length
Array.Copy(ACpdu.ProtocalVersion, 0, r, len, ACpdu.ProtocalVersion.Length); len += ACpdu.ProtocalVersion.Length; //version
Array.Copy(reser2, 0, r, len, 2); len += 2; //re2
Array.Copy(ACpdu.uCalledAET, 0, r, len, ACpdu.uCalledAET.Length); len += 16; //ced
Array.Copy(ACpdu.uCallingAET, 0, r, len, ACpdu.uCallingAET.Length); len += 16; //cing
Array.Copy(reser32, 0, r, len, 32); len += 32; //re32
Array.Copy(ACpdu.Context, 0, r, len, ACpdu.Context.Length); len += ACpdu.Context.Length; //contex
return(ACpdu);
}
public AAssociateAC writeAPer(AAssociateAC ACpdu)
{
/*根据RQ编写,
* 1 遍历VItems取type=20,30,第一个40的item
* 2 复制20，40的内容，注意 AC20length=RQ20length-（RQ30length+4）
*/
foreach (Item i in ACpdu.VItems)
{
if (i.ItemType == "20")
{
per += ("21" + "00");
length20 = i.ItemLength;
PCID20 = i.PCID;
}
if (i.ItemType == "30")
{
//AC20length=RQ20length-（RQ30length+4）
length20 -= (i.ItemLength + 4);
per += "00";
per += Convert.ToString(length20, 16);
per += (PCID20 + "000000");
}
if (i.ItemType == "40")
{
per += (i.ItemType + "00");
per += "00";
per += Convert.ToString(i.ItemLength, 16);
per += converuid(i.Uid);
}
}
per = per.Replace(".", "2E");
if (per.Length % 2 != 0)
{
per += "0";
}
ACpdu.Per = HexStringToByteArray(per);
return(ACpdu);
}
//处理接收的客户端数据
public void ReceiveFromClient()
{
/*
* 1 循环读取:先读取一位，判断类型，使用不同方法解码（RQ/AC 和 RJ/RL）
* 2 安位循环读取，大于PDUlength或AET时break
* 3 根据不同类型构造并返回结果
* 4 循环接收客户端pdu
*/
while (true)
{
try
{
PDU pdu = null; //实例化相应PDU解析类，存储解析并pdu内容
f = true; //循环读取第一位标志
//循环读第一位，判断类型，符合类型跳出循环，解析剩余内容
while (f)
{
try
{
t = br.ReadByte();
type = t.ToString("x2");
switch (type)
{
case "01": { f = false; pdu = new AAssociateRQ(); break; } //修改标志，跳出循环
case "02": { f = false; pdu = new AAssociateAC(); break; } //修改标志，跳出循环
case "03": { f = false; pdu = new AAssociateRJ(); break; } //修改标志，跳出循环
case "05": { f = false; pdu = new AReleaseRQ(); break; } //修改标志，跳出循环
case "06": { f = false; pdu = new AReleaseRP(); break; } //修改标志，跳出循环
default: break;
}
}
catch { break; }
}
//保存pdu类型，并打印
pdu.PDUType[0] = t;
rtbLog.AppendText(pdu.Log());
//读取PDU长度
br.ReadByte(); //跳过保留位
uint length = 0;
for (int i = 0; i < 4; i++) //长度占4位
{
length *= 256; //左移8位
length += br.ReadByte();
}
pdu.PDULength = length;
//读取剩余PDU内容
byte[] pdu1 = br.ReadBytes((int)length);
//分解剩余头部
pdu.PDUSplit(pdu1);
rtbLog.AppendText("\nRecieved RQ PDU:" + pdu.PDUString(pdu) + "\n\n");
//比较AET
pdu.pCalledAET = CalledTitle;
pdu.pCallingAET = CallingTitle;
pdu.AETitle(pdu);
//发送结果
rtbLog.AppendText("\nSent PDU:\n");
foreach (byte i1 in pdu.r)
{
rtbLog.AppendText(i1.ToString("x2"));
}
rtbLog.AppendText("\n\n" + pdu.log);
bw.Write(pdu.r);
bw.Flush();
//释放关联,关闭网络流,修改网络流状态标志，跳出循环
if (type == "05")
{
br.Close(); bw.Close(); nets = false; break;
}
//重置循环解析type标志
f = true;
}
catch { break; }
}
}
//用户信息条目（固定）
public AAssociateAC writeUInfo(AAssociateAC ACpdu)
{
ACpdu.UInfo = HexStringToByteArray("5000003B51000004000080005200001C312E322E3832362E302E312E333638303034332E322E36302E302E315500000F736F66746C696E6B5F6A6474313033");
return(ACpdu);
}
//应用上下文（固定）
public AAssociateAC writeAPP(AAssociateAC ACpdu)
{
ACpdu.App = HexStringToByteArray("10 00 0015 312E322E3834302E31303030382E332E312E312E31");
return(ACpdu);
}
