public File Load(string path)
{
// 初始化
p = 0;
index = new List <long>();
fs = new FileStream(path, FileMode.Open, FileAccess.Read);
byte[] bytes = new byte[header.GetSize()];
fs.Read(bytes, 0, bytes.Length);
header = (Header)StructBytes.BytesToStructure(bytes, typeof(Header));
bytes = new byte[header.listenPointsAsBytesCount];
fs.Read(bytes, 0, bytes.Length);
listenPoints = new List <IPEndPoint>();
for (int i = 0; i < header.listenPointsAsBytesCount; i += (4 + 2))
{
ReadOnlySpan <byte> ipb = new ReadOnlySpan <byte>(bytes, i, 4);
listenPoints.Add(new IPEndPoint(new IPAddress(ipb), (int)BitConverter.ToUInt16(bytes, i + 4)));
//listenPoints.Add(new IPandPort(bytes[i + 0] + "." + bytes[i + 1] + "." + bytes[i + 2] + "." + bytes[i + 3], BitConverter.ToUInt16(bytes, i + 4)));
}
bytes = new byte[header.notesAsBytesCount];
fs.Read(bytes, 0, bytes.Length);
notes = Encoding.UTF8.GetString(bytes);
// 建立文件内索引
bytes = new byte[4];
while (fs.Position < fs.Length)
{
index.Add(fs.Position);
fs.Read(bytes, 0, 4);
var ol = BitConverter.ToInt32(bytes);
fs.Read(bytes, 0, 4);
var cl = BitConverter.ToInt32(bytes);
fs.Seek(cl, SeekOrigin.Current);
}
// 返回文件数据开头
fs.Seek(header.fileInfoLength, SeekOrigin.Begin);
return(this);
}
public void CheckWorkstations()
{
int n = 0;
Thread.Sleep(5000);
MessagePacket messagepack;
Socket s = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, ProtocolType.Udp);
IPAddress broadcast = IPAddress.Parse("192.168.1.255");
IPEndPoint ep = new IPEndPoint(broadcast, 11000);
// s.SendTo(sendbuf, ep);
StructBytes sf = new StructBytes(typeof(MessagePacket));
try
{
while (true)
{
foreach (tblController tblcontroller in tblSolution.m_tblSolution().m_tblControllerCollection)
{
messagepack.Index = 1;
messagepack.res = 1;
messagepack.CAT = 1;
messagepack.ID = 1;
messagepack.StationNo = (byte)tblcontroller.NodeNumber;
//udpServer.Send(sf.StructToByteArray(messagepack), sf.SizeofStructure(messagepack));
n = s.SendTo(sf.StructToByteArray(messagepack), ep);
//udpServer.Send(new byte[] { 1 }, 1);
Thread.Sleep(100);
}
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
public File Create()
{
// 初始化
p = 0;
index = new List <long>();
// FileMode.Create : 如果存在同名文件则覆盖
fs = new FileStream(pathWithName + "_" + partNum + ".lcl", FileMode.Create, FileAccess.Write);
// 跳过 header 部分
// 因为部分数据需要之后才能确定
fs.Seek(header.GetSize(), SeekOrigin.Begin);
// 写入 listenPoints
foreach (var point in listenPoints)
{
fs.Write(point.Address.GetAddressBytes(), 0, 4);
fs.Write(BitConverter.GetBytes((ushort)point.Port), 0, 2);
}
// 为 header 中部分数据赋值
header.listenPointsAsBytesCount = listenPoints.Count * (4 + 2);
// 写入 notes
var bytes = Encoding.UTF8.GetBytes(notes, 0, notes.Length);
fs.Write(bytes, 0, bytes.Length);
// 为 header 中部分数据赋值
header.notesAsBytesCount = bytes.Length;
header.fileInfoLength = fs.Position;
// 回到文件开头
fs.Seek(0, SeekOrigin.Begin);
fs.Write(StructBytes.ConvertStructToBytes(header), 0, header.GetSize());
// 返回文件数据开头
fs.Seek(header.fileInfoLength, SeekOrigin.Begin);
return(this);
}
public void ReadData()
{
try
{
IPEndPoint remoteEP = new IPEndPoint(IPAddress.Any, BroadcastPortNo);
//udpServer.Connect(remoteEP);
while (true)
{
Trace.Write("receive data from " + remoteEP.ToString());
StructBytes sf = new StructBytes(typeof(MessagePacket));
var data = udpSocket.Receive(ref remoteEP); // listen on port 11000
//udpServer.Send(new byte[] { 1 }, 1, remoteEP); // reply back
}
}
catch (Exception ex)
{
MessageBox.Show(ex.Message);
}
}
