/// <summary>
/// Replaces the user code with a stub.
/// Moves the original code to a new method
/// </summary>
/// <param name="td">The class containing the method </param>
/// <param name="md">The method to be stubbed </param>
/// <param name="ServerRpcAttr">The attribute that made this an RPC</param>
/// <returns>The method containing the original code</returns>
/// <remarks>
/// Generates code like this: (Observers case)
/// <code>
/// public void Test (int param)
/// {
/// NetworkWriter writer = new NetworkWriter();
/// writer.WritePackedUInt32((uint) param);
/// base.SendRpcInternal(typeof(class),"RpcTest", writer, 0);
/// }
/// public void UserCode_Test(int param)
/// {
/// // whatever the user did before
/// }
/// </code>
///
/// Generates code like this: (Owner/Connection case)
/// <code>
/// public void TargetTest(NetworkConnection conn, int param)
/// {
/// NetworkWriter writer = new NetworkWriter();
/// writer.WritePackedUInt32((uint)param);
/// base.SendTargetRpcInternal(conn, typeof(class), "TargetTest", val);
/// }
///
/// public void UserCode_TargetTest(NetworkConnection conn, int param)
/// {
/// // whatever the user did before
/// }
/// </code>
/// or if no connection is specified
///
/// <code>
/// public void TargetTest (int param)
/// {
/// NetworkWriter writer = new NetworkWriter();
/// writer.WritePackedUInt32((uint) param);
/// base.SendTargetRpcInternal(null, typeof(class), "TargetTest", val);
/// }
///
/// public void UserCode_TargetTest(int param)
/// {
/// // whatever the user did before
/// }
/// </code>
/// </remarks>
private MethodDefinition GenerateStub(MethodDefinition md, CustomAttribute clientRpcAttr, int rpcIndex, ValueSerializer[] paramSerializers)
{
var rpc = SubstituteMethod(md);
var worker = md.Body.GetILProcessor();
// if (IsClient)
// {
// call the body
// }
CallBody(worker, rpc);
// NetworkWriter writer = NetworkWriterPool.GetWriter()
var writer = md.AddLocal <PooledNetworkWriter>();
worker.Append(worker.Create(OpCodes.Call, () => NetworkWriterPool.GetWriter()));
worker.Append(worker.Create(OpCodes.Stloc, writer));
// write all the arguments that the user passed to the Rpc call
WriteArguments(worker, md, writer, paramSerializers, RemoteCallType.ClientRpc);
var rpcName = md.FullName;
var target = clientRpcAttr.GetField(nameof(ClientRpcAttribute.target), RpcTarget.Observers);
var channel = clientRpcAttr.GetField(nameof(ClientRpcAttribute.channel), 0);
var excludeOwner = clientRpcAttr.GetField(nameof(ClientRpcAttribute.excludeOwner), false);
var sendMethod = GetSendMethod(md, target);
// ClientRpcSender.Send(this, 12345, writer, channel, requireAuthority)
worker.Append(worker.Create(OpCodes.Ldarg_0));
worker.Append(worker.Create(OpCodes.Ldc_I4, rpcIndex));
worker.Append(worker.Create(OpCodes.Ldloc, writer));
worker.Append(worker.Create(OpCodes.Ldc_I4, channel));
// last arg of send is either bool, or NetworkPlayer
// see ClientRpcSender.Send methods
if (target == RpcTarget.Observers)
{
worker.Append(worker.Create(excludeOwner ? OpCodes.Ldc_I4_1 : OpCodes.Ldc_I4_0));
}
else if (target == RpcTarget.Player && HasNetworkPlayerParameter(md))
{
worker.Append(worker.Create(OpCodes.Ldarg_1));
}
else // owner, or Player with no arg
{
worker.Append(worker.Create(OpCodes.Ldnull));
}
worker.Append(worker.Create(OpCodes.Call, sendMethod));
NetworkWriterHelper.CallRelease(module, worker, writer);
worker.Append(worker.Create(OpCodes.Ret));
return(rpc);
}
/// <summary>
/// Replaces the user code with a stub.
/// Moves the original code to a new method
/// </summary>
/// <param name="td">The class containing the method </param>
/// <param name="md">The method to be stubbed </param>
/// <param name="ServerRpcAttr">The attribute that made this an RPC</param>
/// <returns>The method containing the original code</returns>
/// <remarks>
/// Generates code like this:
/// <code>
/// public void MyServerRpc(float thrusting, int spin)
/// {
/// NetworkWriter networkWriter = new NetworkWriter();
/// networkWriter.Write(thrusting);
/// networkWriter.WritePackedUInt32((uint) spin);
/// base.SendServerRpcInternal(cmdName, networkWriter, cmdName);
/// }
///
/// public void UserCode_MyServerRpc(float thrusting, int spin)
/// {
/// // whatever the user was doing before
///
/// }
/// </code>
/// </remarks>
private MethodDefinition GenerateStub(MethodDefinition md, CustomAttribute serverRpcAttr, int rpcIndex, ValueSerializer[] paramSerializers)
{
var cmd = SubstituteMethod(md);
var worker = md.Body.GetILProcessor();
// if (IsServer)
// {
// call the body
// return;
// }
CallBody(worker, cmd);
// NetworkWriter writer = NetworkWriterPool.GetWriter()
var writer = md.AddLocal <PooledNetworkWriter>();
worker.Append(worker.Create(OpCodes.Call, md.Module.ImportReference(() => NetworkWriterPool.GetWriter())));
worker.Append(worker.Create(OpCodes.Stloc, writer));
// write all the arguments that the user passed to the Cmd call
WriteArguments(worker, md, writer, paramSerializers, RemoteCallType.ServerRpc);
var cmdName = md.FullName;
var channel = serverRpcAttr.GetField(nameof(ServerRpcAttribute.channel), 0);
var requireAuthority = serverRpcAttr.GetField(nameof(ServerRpcAttribute.requireAuthority), true);
var sendMethod = GetSendMethod(md, worker);
// ServerRpcSender.Send(this, 12345, writer, channel, requireAuthority)
worker.Append(worker.Create(OpCodes.Ldarg_0));
worker.Append(worker.Create(OpCodes.Ldc_I4, rpcIndex));
worker.Append(worker.Create(OpCodes.Ldloc, writer));
worker.Append(worker.Create(OpCodes.Ldc_I4, channel));
worker.Append(worker.Create(requireAuthority ? OpCodes.Ldc_I4_1 : OpCodes.Ldc_I4_0));
worker.Append(worker.Create(OpCodes.Call, sendMethod));
NetworkWriterHelper.CallRelease(module, worker, writer);
worker.Append(worker.Create(OpCodes.Ret));
return(cmd);
}