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Injector.Injected.cs
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Injector.Injected.cs
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using System;
using System.IO.MemoryMappedFiles;
using System.IO.Pipes;
using System.Reflection;
using System.Threading.Tasks;
namespace Mogu
{
public partial class Injector
{
/// <summary>
/// EntryPoint for dotnet core hosting.
/// This function is called by MoguHost.dll on target process.
/// </summary>
/// <param name="arg"></param>
/// <param name="len"></param>
internal static int InjectedEntryPoint(IntPtr arg, int len)
{
var pid = NativeFunctions.GetCurrentProcessId();
try
{
string assemblyLocation;
string typeName;
string methodName;
string pipeName;
using (var sharedMemory = MemoryMappedFile.OpenExisting(GetMemoryMappedFileName(pid)))
using (var accessor = sharedMemory.CreateViewAccessor())
{
var position = 0;
assemblyLocation = accessor.ReadString(position, out position);
typeName = accessor.ReadString(position, out position);
methodName = accessor.ReadString(position, out position);
pipeName = accessor.ReadString(position, out position);
}
var pipe = new NamedPipeClientStream(".", pipeName, PipeDirection.InOut);
try
{
// timeout is 10sec
const int timeout = 10 * 1000;
pipe.Connect(timeout);
var assembly = Assembly.LoadFrom(assemblyLocation);
// var assembly = Assembly.LoadFrom(assemblyLocation);
if (assembly == null)
{
return -1;
}
var type = assembly.GetType(typeName);
if (type == null)
{
return -1;
}
var methodInfo = type.GetMethod(methodName, BindingFlags.Static | BindingFlags.Public | BindingFlags.NonPublic);
if (methodInfo == null)
{
return -1;
}
var parameters = methodInfo.GetParameters();
if (parameters.Length != 1)
{
return -1;
}
var connectionParameter = parameters[0];
var connectionType = connectionParameter.ParameterType;
if (connectionType.AssemblyQualifiedName != typeof(Connection).AssemblyQualifiedName)
{
return -1;
}
InvokeManagedEntryPoint(pipe, methodInfo);
}
catch (Exception)
{
pipe.Dispose();
// TODO: log.
}
}
catch
{
// Not target process if can not open MemoryMappedFile or NamedPipe.
}
return 0;
}
private static void InvokeManagedEntryPoint(NamedPipeClientStream pipe, MethodInfo entryPointMethod)
{
var connectionType = entryPointMethod.GetParameters()[0].ParameterType;
if (connectionType.Assembly != typeof(Connection).Assembly)
{
// Avoid InvalidCastException.
connectionType.Assembly
.GetType(typeof(Injector).FullName)
.GetMethod(nameof(InvokeManagedEntryPoint), BindingFlags.Static | BindingFlags.NonPublic)
.Invoke(null, new object[] { pipe, entryPointMethod });
return;
}
var connection = new Connection(pipe);
try
{
var result = entryPointMethod.Invoke(null, new object[] { connection });
switch (result)
{
case Task t:
t.Wait();
break;
case ValueTask t:
t.AsTask().Wait();
break;
default:
break;
}
}
catch
{
}
finally
{
if (connection.IsAutoClose)
{
connection.Dispose();
}
}
}
}
}