| public Write ( DType dtype, object val ) : void | ||
| dtype | DType | |
| val | object | |
| return | void | |
public void HandleMethodCall (MethodCall method_call)
{
Type type = obj.GetType ();
//object retObj = type.InvokeMember (msg.Member, BindingFlags.InvokeMethod, null, obj, MessageHelper.GetDynamicValues (msg));
//TODO: there is no member name mapping for properties etc. yet
MethodInfo mi = Mapper.GetMethod (type, method_call);
if (mi == null) {
conn.MaybeSendUnknownMethodError (method_call);
return;
}
object retObj = null;
try {
object[] inArgs = MessageHelper.GetDynamicValues (method_call.message, mi.GetParameters ());
retObj = mi.Invoke (obj, inArgs);
} catch (TargetInvocationException e) {
if (!method_call.message.ReplyExpected)
return;
Exception ie = e.InnerException;
//TODO: complete exception sending support
Error error = new Error (Mapper.GetInterfaceName (ie.GetType ()), method_call.message.Header.Serial);
error.message.Signature = new Signature (DType.String);
MessageWriter writer = new MessageWriter (Connection.NativeEndianness);
writer.connection = conn;
writer.Write (ie.Message);
error.message.Body = writer.ToArray ();
//TODO: we should be more strict here, but this fallback was added as a quick fix for p2p
if (method_call.Sender != null)
error.message.Header.Fields[FieldCode.Destination] = method_call.Sender;
conn.Send (error.message);
return;
}
if (method_call.message.ReplyExpected) {
/*
object[] retObjs;
if (retObj == null) {
retObjs = new object[0];
} else {
retObjs = new object[1];
retObjs[0] = retObj;
}
Message reply = ConstructReplyFor (method_call, retObjs);
*/
Message reply = MessageHelper.ConstructReplyFor (method_call, mi.ReturnType, retObj);
conn.Send (reply);
}
}
public Error CreateError(string errorName, string errorMessage)
{
Error error = new Error(errorName, message.Header.Serial);
error.message.Signature = Signature.StringSig;
MessageWriter writer = new MessageWriter(message.Header.Endianness);
//writer.connection = conn;
writer.Write(errorMessage);
error.message.Body = writer.ToArray();
//if (method_call.Sender != null)
// replyMsg.Header[FieldCode.Destination] = method_call.Sender;
return(error);
}
public static Message ConstructDynamicReply(MethodCall method_call, MethodInfo mi, object retVal, object[] vals)
{
Type retType = mi.ReturnType;
MethodReturn method_return = new MethodReturn(method_call.message.Header.Serial);
Message replyMsg = method_return.message;
Signature outSig = Signature.GetSig(retType);
outSig += Signature.GetSig(Mapper.GetTypes(ArgDirection.Out, mi.GetParameters()));
if (outSig != Signature.Empty)
{
MessageWriter writer = new MessageWriter(Connection.NativeEndianness);
//first write the return value, if any
if (retType != null && retType != typeof(void))
{
writer.Write(retType, retVal);
}
//then write the out args
WriteDynamicValues(writer, mi.GetParameters(), vals);
replyMsg.Body = writer.ToArray();
}
//TODO: we should be more strict here, but this fallback was added as a quick fix for p2p
if (method_call.Sender != null)
{
replyMsg.Header.Fields[FieldCode.Destination] = method_call.Sender;
}
replyMsg.Signature = outSig;
return(replyMsg);
}
public void GetHeaderDataToStream(Stream stream)
{
if (Body != null)
{
Header.Length = (uint)Body.Length;
}
MessageWriter writer = new MessageWriter(Header.Endianness);
//headerWriter (writer, Header);
writer.Write((byte)Header.Endianness);
writer.Write((byte)Header.MessageType);
writer.Write((byte)Header.Flags);
writer.Write(Header.MajorVersion);
writer.Write(Header.Length);
writer.Write(Header.Serial);
writer.WriteHeaderFields(Header.Fields);
writer.CloseWrite();
writer.ToStream(stream);
}
//public HeaderField[] Fields;
/*
* public void SetHeaderData (byte[] data)
* {
* EndianFlag endianness = (EndianFlag)data[0];
* MessageReader reader = new MessageReader (endianness, data);
*
* Header = (Header)reader.ReadStruct (typeof (Header));
* }
*/
//TypeWriter<Header> headerWriter = TypeImplementer.GetTypeWriter<Header> ();
public byte[] GetHeaderData()
{
if (Body != null)
{
Header.Length = (uint)Body.Length;
}
MessageWriter writer = new MessageWriter(Header.Endianness);
//writer.stream.Capacity = 512;
//headerWriter (writer, Header);
writer.Write((byte)Header.Endianness);
writer.Write((byte)Header.MessageType);
writer.Write((byte)Header.Flags);
writer.Write(Header.MajorVersion);
writer.Write(Header.Length);
writer.Write(Header.Serial);
writer.WriteHeaderFields(Header.Fields);
writer.CloseWrite();
return(writer.ToArray());
}
public static Message ConstructDynamicReply (MethodCall method_call, MethodInfo mi, object retVal, object[] vals)
{
Type retType = mi.ReturnType;
MethodReturn method_return = new MethodReturn (method_call.message.Header.Serial);
Message replyMsg = method_return.message;
Signature outSig = Signature.GetSig (retType);
outSig += Signature.GetSig (Mapper.GetTypes (ArgDirection.Out, mi.GetParameters ()));
if (outSig != Signature.Empty) {
MessageWriter writer = new MessageWriter (Connection.NativeEndianness);
//first write the return value, if any
if (retType != null && retType != typeof (void))
writer.Write (retType, retVal);
//then write the out args
WriteDynamicValues (writer, mi.GetParameters (), vals);
replyMsg.Body = writer.ToArray ();
}
//TODO: we should be more strict here, but this fallback was added as a quick fix for p2p
if (method_call.Sender != null)
replyMsg.Header.Fields[FieldCode.Destination] = method_call.Sender;
replyMsg.Signature = outSig;
return replyMsg;
}
public static Message ConstructReply (MethodCall method_call, params object[] vals)
{
MethodReturn method_return = new MethodReturn (method_call.message.Header.Serial);
Message replyMsg = method_return.message;
Signature inSig = Signature.GetSig (vals);
if (vals != null && vals.Length != 0) {
MessageWriter writer = new MessageWriter (Connection.NativeEndianness);
foreach (object arg in vals)
writer.Write (arg.GetType (), arg);
replyMsg.Body = writer.ToArray ();
}
//TODO: we should be more strict here, but this fallback was added as a quick fix for p2p
if (method_call.Sender != null)
replyMsg.Header.Fields[FieldCode.Destination] = method_call.Sender;
replyMsg.Signature = inSig;
//replyMsg.WriteHeader ();
return replyMsg;
}
public static void WriteDynamicValues (MessageWriter mw, ParameterInfo[] parms, object[] vals)
{
foreach (ParameterInfo parm in parms) {
if (!parm.IsOut)
continue;
Type actualType = parm.ParameterType.GetElementType ();
mw.Write (actualType, vals[parm.Position]);
}
}
public static Message CreateUnknownMethodError (MethodCall method_call)
{
if (!method_call.message.ReplyExpected)
return null;
string errMsg = String.Format ("Method \"{0}\" with signature \"{1}\" on interface \"{2}\" doesn't exist", method_call.Member, method_call.Signature.Value, method_call.Interface);
Error error = new Error ("org.freedesktop.DBus.Error.UnknownMethod", method_call.message.Header.Serial);
error.message.Signature = new Signature (DType.String);
MessageWriter writer = new MessageWriter (Connection.NativeEndianness);
writer.Write (errMsg);
error.message.Body = writer.ToArray ();
//TODO: we should be more strict here, but this fallback was added as a quick fix for p2p
if (method_call.Sender != null)
error.message.Header.Fields[FieldCode.Destination] = method_call.Sender;
return error.message;
}
public void Invoke (MethodBase methodBase, string methodName, object[] inArgs, out object[] outArgs, out object retVal, out Exception exception)
{
outArgs = new object[0];
retVal = null;
exception = null;
MethodInfo mi = methodBase as MethodInfo;
if (mi != null && mi.IsSpecialName && (methodName.StartsWith ("add_") || methodName.StartsWith ("remove_"))) {
string[] parts = methodName.Split (new char[]{'_'}, 2);
string ename = parts[1];
Delegate dlg = (Delegate)inArgs[0];
ToggleSignal (Mapper.GetInterfaceName (mi), ename, dlg, parts[0] == "add");
return;
}
Type[] inTypes = Mapper.GetTypes (ArgDirection.In, mi.GetParameters ());
Signature inSig = Signature.GetSig (inTypes);
MethodCall method_call;
Message callMsg;
//build the outbound method call message
{
//this bit is error-prone (no null checking) and will need rewriting when DProxy is replaced
string iface = null;
if (mi != null)
iface = Mapper.GetInterfaceName (mi);
//map property accessors
//TODO: this needs to be done properly, not with simple String.Replace
//note that IsSpecialName is also for event accessors, but we already handled those and returned
if (mi != null && mi.IsSpecialName) {
methodName = methodName.Replace ("get_", "Get");
methodName = methodName.Replace ("set_", "Set");
}
method_call = new MethodCall (object_path, iface, methodName, bus_name, inSig);
callMsg = method_call.message;
if (inArgs != null && inArgs.Length != 0) {
MessageWriter writer = new MessageWriter (Connection.NativeEndianness);
writer.connection = conn;
for (int i = 0 ; i != inTypes.Length ; i++)
writer.Write (inTypes[i], inArgs[i]);
callMsg.Body = writer.ToArray ();
}
}
//TODO: complete out parameter support
/*
Type[] outParmTypes = Mapper.GetTypes (ArgDirection.Out, mi.GetParameters ());
Signature outParmSig = Signature.GetSig (outParmTypes);
if (outParmSig != Signature.Empty)
throw new Exception ("Out parameters not yet supported: out_signature='" + outParmSig.Value + "'");
*/
Type[] outTypes = new Type[1];
outTypes[0] = mi.ReturnType;
//we default to always requiring replies for now, even though unnecessary
//this is to make sure errors are handled synchronously
//TODO: don't hard code this
bool needsReply = true;
//if (mi.ReturnType == typeof (void))
// needsReply = false;
callMsg.ReplyExpected = needsReply;
callMsg.Signature = inSig;
if (!needsReply) {
conn.Send (callMsg);
return;
}
#if PROTO_REPLY_SIGNATURE
if (needsReply) {
Signature outSig = Signature.GetSig (outTypes);
callMsg.Header.Fields[FieldCode.ReplySignature] = outSig;
}
#endif
Message retMsg = conn.SendWithReplyAndBlock (callMsg);
//handle the reply message
switch (retMsg.Header.MessageType) {
case MessageType.MethodReturn:
object[] retVals = MessageHelper.GetDynamicValues (retMsg, outTypes);
if (retVals.Length != 0)
retVal = retVals[retVals.Length - 1];
break;
case MessageType.Error:
//TODO: typed exceptions
Error error = new Error (retMsg);
string errMsg = String.Empty;
if (retMsg.Signature.Value.StartsWith ("s")) {
MessageReader reader = new MessageReader (retMsg);
errMsg = reader.ReadString ();
}
exception = new Exception (error.ErrorName + ": " + errMsg);
break;
default:
throw new Exception ("Got unexpected message of type " + retMsg.Header.MessageType + " while waiting for a MethodReturn or Error");
}
return;
}
public void GetHeaderDataToStream(Stream stream)
{
if (Body != null)
Header.Length = (uint)Body.Length;
MessageWriter writer = new MessageWriter (Header.Endianness);
//headerWriter (writer, Header);
writer.Write ((byte)Header.Endianness);
writer.Write ((byte)Header.MessageType);
writer.Write ((byte)Header.Flags);
writer.Write (Header.MajorVersion);
writer.Write (Header.Length);
writer.Write (Header.Serial);
writer.WriteHeaderFields (Header.Fields);
writer.CloseWrite ();
writer.ToStream (stream);
}
public void SendSignal (MethodInfo mi, string @interface, string member, object[] outValues)
{
//TODO: make use of bus_name?
Type[] outTypes = Mapper.GetTypes (ArgDirection.In, mi.GetParameters ());
Signature outSig = Signature.GetSig (outTypes);
Signal signal = new Signal (object_path, @interface, member);
signal.message.Signature = outSig;
if (outValues != null && outValues.Length != 0) {
MessageWriter writer = new MessageWriter (Connection.NativeEndianness);
writer.connection = conn;
for (int i = 0 ; i != outTypes.Length ; i++)
writer.Write (outTypes[i], outValues[i]);
signal.message.Body = writer.ToArray ();
}
conn.Send (signal.message);
}
public void HandleMethodCall(MethodCall method_call)
{
Type type = obj.GetType();
//object retObj = type.InvokeMember (msg.Member, BindingFlags.InvokeMethod, null, obj, MessageHelper.GetDynamicValues (msg));
//TODO: there is no member name mapping for properties etc. yet
MethodInfo mi = Mapper.GetMethod(type, method_call);
if (mi == null)
{
conn.MaybeSendUnknownMethodError(method_call);
return;
}
object retObj = null;
try {
object[] inArgs = MessageHelper.GetDynamicValues(method_call.message, mi.GetParameters());
retObj = mi.Invoke(obj, inArgs);
} catch (TargetInvocationException e) {
if (!method_call.message.ReplyExpected)
{
return;
}
Exception ie = e.InnerException;
//TODO: complete exception sending support
Error error = new Error(Mapper.GetInterfaceName(ie.GetType()), method_call.message.Header.Serial);
error.message.Signature = new Signature(DType.String);
MessageWriter writer = new MessageWriter(Connection.NativeEndianness);
writer.connection = conn;
writer.Write(ie.Message);
error.message.Body = writer.ToArray();
//TODO: we should be more strict here, but this fallback was added as a quick fix for p2p
if (method_call.Sender != null)
{
error.message.Header.Fields[FieldCode.Destination] = method_call.Sender;
}
conn.Send(error.message);
return;
}
if (method_call.message.ReplyExpected)
{
/*
* object[] retObjs;
*
* if (retObj == null) {
* retObjs = new object[0];
* } else {
* retObjs = new object[1];
* retObjs[0] = retObj;
* }
*
* Message reply = ConstructReplyFor (method_call, retObjs);
*/
Message reply = MessageHelper.ConstructReplyFor(method_call, mi.ReturnType, retObj);
conn.Send(reply);
}
}
//TODO: merge this with the above method
public static Message ConstructReplyFor (MethodCall method_call, Type retType, object retVal)
{
MethodReturn method_return = new MethodReturn (method_call.message.Header.Serial);
Message replyMsg = method_return.message;
Signature inSig = Signature.GetSig (retType);
if (inSig != Signature.Empty) {
MessageWriter writer = new MessageWriter (Connection.NativeEndianness);
writer.Write (retType, retVal);
replyMsg.Body = writer.ToArray ();
}
//TODO: we should be more strict here, but this fallback was added as a quick fix for p2p
if (method_call.Sender != null)
replyMsg.Header.Fields[FieldCode.Destination] = method_call.Sender;
replyMsg.Signature = inSig;
//replyMsg.WriteHeader ();
return replyMsg;
}
public Error CreateError(string errorName, string errorMessage)
{
Error error = new Error (errorName, message.Header.Serial);
error.message.Signature = Signature.StringSig;
MessageWriter writer = new MessageWriter (message.Header.Endianness);
//writer.connection = conn;
writer.Write (errorMessage);
error.message.Body = writer.ToArray ();
//if (method_call.Sender != null)
// replyMsg.Header[FieldCode.Destination] = method_call.Sender;
return error;
}
void RaiseNameSignal(string memberSuffix, string name)
{
// Name* signals on org.freedesktop.DBus are connection-specific.
// We handle them here as a special case.
Signal nameSignal = new Signal (Path, DBusInterface, "Name" + memberSuffix);
MessageWriter mw = new MessageWriter ();
mw.Write (name);
nameSignal.message.Body = mw.ToArray ();
nameSignal.message.Signature = Signature.StringSig;
Caller.Send (nameSignal.message);
}
public void Invoke(MethodBase methodBase, string methodName, object[] inArgs, out object[] outArgs, out object retVal, out Exception exception)
{
outArgs = new object[0];
retVal = null;
exception = null;
MethodInfo mi = methodBase as MethodInfo;
if (mi != null && mi.IsSpecialName && (methodName.StartsWith("add_") || methodName.StartsWith("remove_")))
{
string[] parts = methodName.Split(new char[] { '_' }, 2);
string ename = parts[1];
Delegate dlg = (Delegate)inArgs[0];
MatchRule rule = new MatchRule();
rule.MessageType = MessageType.Signal;
rule.Interface = Mapper.GetInterfaceName(mi);
rule.Member = ename;
rule.Path = object_path;
if (parts[0] == "add")
{
if (conn.Handlers.ContainsKey(rule))
{
conn.Handlers[rule] = Delegate.Combine(conn.Handlers[rule], dlg);
}
else
{
conn.Handlers[rule] = dlg;
conn.AddMatch(rule.ToString());
}
}
else if (parts[0] == "remove")
{
conn.Handlers[rule] = Delegate.Remove(conn.Handlers[rule], dlg);
if (conn.Handlers[rule] == null)
{
conn.RemoveMatch(rule.ToString());
conn.Handlers.Remove(rule);
}
}
return;
}
Type[] inTypes = Mapper.GetTypes(ArgDirection.In, mi.GetParameters());
Signature inSig = Signature.GetSig(inTypes);
MethodCall method_call;
Message callMsg;
//build the outbound method call message
{
//this bit is error-prone (no null checking) and will need rewriting when DProxy is replaced
string iface = null;
if (mi != null)
{
iface = Mapper.GetInterfaceName(mi);
}
//map property accessors
//TODO: this needs to be done properly, not with simple String.Replace
//note that IsSpecialName is also for event accessors, but we already handled those and returned
if (mi != null && mi.IsSpecialName)
{
methodName = methodName.Replace("get_", "Get");
methodName = methodName.Replace("set_", "Set");
}
method_call = new MethodCall(object_path, iface, methodName, bus_name, inSig);
callMsg = method_call.message;
if (inArgs != null && inArgs.Length != 0)
{
MessageWriter writer = new MessageWriter(Connection.NativeEndianness);
writer.connection = conn;
for (int i = 0; i != inTypes.Length; i++)
{
writer.Write(inTypes[i], inArgs[i]);
}
callMsg.Body = writer.ToArray();
}
}
//TODO: complete out parameter support
Type[] outParmTypes = Mapper.GetTypes(ArgDirection.Out, mi.GetParameters());
Signature outParmSig = Signature.GetSig(outParmTypes);
if (outParmSig != Signature.Empty)
{
throw new Exception("Out parameters not yet supported: out_signature='" + outParmSig.Value + "'");
}
Type[] outTypes = new Type[1];
outTypes[0] = mi.ReturnType;
//we default to always requiring replies for now, even though unnecessary
//this is to make sure errors are handled synchronously
//TODO: don't hard code this
bool needsReply = true;
//if (mi.ReturnType == typeof (void))
// needsReply = false;
callMsg.ReplyExpected = needsReply;
callMsg.Signature = inSig;
if (!needsReply)
{
conn.Send(callMsg);
return;
}
#if PROTO_REPLY_SIGNATURE
if (needsReply)
{
Signature outSig = Signature.GetSig(outTypes);
callMsg.Header.Fields[FieldCode.ReplySignature] = outSig;
}
#endif
Message retMsg = conn.SendWithReplyAndBlock(callMsg);
//handle the reply message
switch (retMsg.Header.MessageType)
{
case MessageType.MethodReturn:
object[] retVals = MessageHelper.GetDynamicValues(retMsg, outTypes);
if (retVals.Length != 0)
{
retVal = retVals[retVals.Length - 1];
}
break;
case MessageType.Error:
//TODO: typed exceptions
Error error = new Error(retMsg);
string errMsg = String.Empty;
if (retMsg.Signature.Value.StartsWith("s"))
{
MessageReader reader = new MessageReader(retMsg);
reader.GetValue(out errMsg);
}
exception = new Exception(error.ErrorName + ": " + errMsg);
break;
default:
throw new Exception("Got unexpected message of type " + retMsg.Header.MessageType + " while waiting for a MethodReturn or Error");
}
return;
}
//public HeaderField[] Fields;
/*
public void SetHeaderData (byte[] data)
{
EndianFlag endianness = (EndianFlag)data[0];
MessageReader reader = new MessageReader (endianness, data);
Header = (Header)reader.ReadStruct (typeof (Header));
}
*/
//TypeWriter<Header> headerWriter = TypeImplementer.GetTypeWriter<Header> ();
public byte[] GetHeaderData()
{
if (Body != null)
Header.Length = (uint)Body.Length;
MessageWriter writer = new MessageWriter (Header.Endianness);
//writer.stream.Capacity = 512;
//headerWriter (writer, Header);
writer.Write ((byte)Header.Endianness);
writer.Write ((byte)Header.MessageType);
writer.Write ((byte)Header.Flags);
writer.Write (Header.MajorVersion);
writer.Write (Header.Length);
writer.Write (Header.Serial);
writer.WriteHeaderFields (Header.Fields);
writer.CloseWrite ();
return writer.ToArray ();
}
