/// <summary>
/// 拆包
/// </summary>
/// <param name="buffer"></param>
/// <param name="identity"></param>
/// <param name="fileModel"></param>
/// <returns></returns>
public List <byte[]> PackageSlice(byte[] buffer, ushort identity, UdpFileModel fileModel)
{
List <byte[]> result = new List <byte[]>();
ushort size = (ushort)(buffer.Length / Count);
if (buffer.Length % Count > 0)
{
size++;
}
for (ushort i = 0; i < size; i++)
{
var tmp = buffer.Length - i * Count;
var slicePackage = new UdpPackage()
{
PackageIdentityNum = identity,
PackageSerialNum = i,
PackageFileMode = fileModel,
PackageCount = size,
PackageBuffer = buffer.Skip(i * Count).Take(tmp < Count ? tmp : Count).ToArray()
};
result.Add(UdpPackageToBytes(slicePackage));
}
return(result);
}
/// <summary>
/// Udp数据包转byte数组
/// </summary>
/// <param name="package">udp数据包</param>
/// <returns></returns>
public static byte[] UdpPackageToBytes(UdpPackage package)
{
byte[] buffer = new byte[package.PackageBuffer.Length + 8];
BitConverter.GetBytes(package.PackageIdentityNum).CopyTo(buffer, 0);
BitConverter.GetBytes(package.PackageSerialNum).CopyTo(buffer, 2);
BitConverter.GetBytes((ushort)package.PackageFileMode).CopyTo(buffer, 4);
BitConverter.GetBytes(package.PackageCount).CopyTo(buffer, 6);
package.PackageBuffer.CopyTo(buffer, 8);
return(buffer);
}