ObjectDeliverer is a data transmission / reception library for Unreal Engine (C ++, Blueprint).
Home Page: https://www.unrealengine.com/marketplace/ja/slug/objectdeliverer
License: MIT License
The plugin is great and works between PC and Oculus GO (Android) on UDP too.
But on Oculus GO (Android), with the UDP socket receiver, after then OpenLevel blueprint we often run into crash, with the following error log. (We use the 1.3.0 version.)
Do you have any suggestions what the problem is?
11-18 15:48:56.328 24541 25075 F libc : Fatal signal 11 (SIGSEGV), code 2, fault addr 0xe848f7c4 in tid 25075 (UProtoc-eceiver)
11-18 15:48:58.439 25080 25080 F DEBUG : *** *** *** *** *** *** *** *** *** *** *** *** *** *** *** ***
11-18 15:48:58.440 25080 25080 F DEBUG : Build fingerprint: 'oculus/vr_pacific/pacific:7.1.1/NGI77B/396520.5580.0:user/release-keys'
11-18 15:48:58.440 25080 25080 F DEBUG : Revision: '0'
11-18 15:48:58.440 25080 25080 F DEBUG : ABI: 'arm'
11-18 15:48:58.441 25080 25080 F DEBUG : pid: 24541, tid: 25075, name: UProtoc-eceiver >>> com.YourCompany.Oculus01 <<<
11-18 15:48:58.441 25080 25080 F DEBUG : signal 11 (SIGSEGV), code 2 (SEGV_ACCERR), fault addr 0xe848f7c4
11-18 15:48:58.441 25080 25080 F DEBUG : r0 ffffffff r1 07ffffff r2 c0b8bdb8 r3 0000001f
11-18 15:48:58.441 25080 25080 F DEBUG : r4 00000000 r5 00000001 r6 00000000 r7 c848f7c8
11-18 15:48:58.441 25080 25080 F DEBUG : r8 c33556b0 r9 00000000 sl c2f91100 fp c848f868
11-18 15:48:58.441 25080 25080 F DEBUG : ip 00000000 sp c848f7c0 lr d4f146d0 pc d4f146ec cpsr 60070010
11-18 15:48:58.478 25080 25080 F DEBUG :
11-18 15:48:58.478 25080 25080 F DEBUG : backtrace:
11-18 15:48:58.478 25080 25080 F DEBUG : #00 pc 030776ec /data/app/com.YourCompany.Oculus01-1/lib/arm/libUE4.so (_ZN10FSocketBSD8HasStateE15ESocketBSDParam9FTimespan+156)
11-18 15:48:58.478 25080 25080 F DEBUG : #1 pc 03076b6c /data/app/com.YourCompany.Oculus01-1/lib/arm/libUE4.so (_ZN10FSocketBSD14HasPendingDataERj+48)
11-18 15:48:58.478 25080 25080 F DEBUG : #2 pc 0266d534 /data/app/com.YourCompany.Oculus01-1/lib/arm/libUE4.so (_ZN18FUdpSocketReceiver6UpdateERK9FTimespan+104)
11-18 15:48:58.479 25080 25080 F DEBUG : #3 pc 0266d358 /data/app/com.YourCompany.Oculus01-1/lib/arm/libUE4.so (_ZN18FUdpSocketReceiver3RunEv+36)
11-18 15:48:58.479 25080 25080 F DEBUG : #4 pc 028a05ec /data/app/com.YourCompany.Oculus01-1/lib/arm/libUE4.so (_ZN22FRunnableThreadPThread3RunEv+92)
11-18 15:48:58.479 25080 25080 F DEBUG : #5 pc 02865eb4 /data/app/com.YourCompany.Oculus01-1/lib/arm/libUE4.so (_ZN22FRunnableThreadPThread11_ThreadProcEPv+64)
11-18 15:48:58.479 25080 25080 F DEBUG : #6 pc 000478d3 /system/lib/libc.so (_ZL15__pthread_startPv+22)
11-18 15:48:58.479 25080 25080 F DEBUG : #7 pc 00019fe5 /system/lib/libc.so (__start_thread+6)
11-18 15:49:01.894 949 25087 W ActivityManager: Force finishing activity com.YourCompany.Oculus01/com.epicgames.ue4.GameActivity
Implement as a protocol to play log files
Hello,
I'm using your plugin for UDP communication, I send MAVLink-protocol messages back and forth between two PCs. And it works beautifully.
But sometimes when I run the program in the UE Editor and then I stop the PIE (Play In Editor) the Editor halts, it doesn't crash but it just freezes.
I think that it might have to do with the UDP communication running in the GameInstance. So I tried to close everything (see image of the close function). And then I started wondering why I never get the "disconnected(receive)" message that is printed when "Disconnect_Event_0" is fired. The "Connected" events all fire and the "connected(receive)" string is written. For the SEND part the same things happen, no disconnected events are fired.
Do you have an idea why this might (or might not) happen?
Thanks & best
Andreas
To close the connections I use the following function:
This is how my RECEIVE stuff is set up (started from "Event Init" of the GameInstance):
Support COM communication
Fix Range Check in UPacketRuleTerminate::NotifyReceiveData
Corrected lines
40 for (int i = 0; i < ReceiveTempBuffer.Num() - Terminate.Num(); ++i)
43 for (int j = 0; j < Terminate.Num(); ++j)
Make object serialization correspond to message pack
Writing this up now just in case anyone has a quick answer, but I'm getting this error while trying to receive JSON objects via UDP.
We are sending around a dozen requests per second. Not sure if that would have an impact.
I'll have a little investigate anyway
[2022.05.17-15.06.29:226][920]LogThreadingWindows: Error: Runnable thread ObjectDeliverer UDPSocket PollingThread crashed.
[2022.05.17-15.06.29:226][920]LogWindows: Error: === Critical error: ===
[2022.05.17-15.06.29:226][920]LogWindows: Error:
[2022.05.17-15.06.29:226][920]LogWindows: Error: Assertion failed: !IsGarbageCollecting() [File:D:\build\++UE5\Sync\Engine\Source\Runtime\CoreUObject\Private\UObject\UObjectGlobals.cpp] [Line: 2441]
[2022.05.17-15.06.29:226][920]LogWindows: Error: Unable to create new object: ProtocolUdpSocket /Engine/Transient.ProtocolUdpSocketReceiver_0.None. Creating UObjects while Collecting Garbage is not allowed!
[2022.05.17-15.06.29:226][920]LogWindows: Error:
[2022.05.17-15.06.29:226][920]LogWindows: Error:
[2022.05.17-15.06.29:226][920]LogWindows: Error: [Callstack] 0x00007ff94fd83fe4 UnrealEditor-CoreUObject.dll!UnknownFunction []
[2022.05.17-15.06.29:226][920]LogWindows: Error: [Callstack] 0x00007ff94fd85eee UnrealEditor-CoreUObject.dll!UnknownFunction []
[2022.05.17-15.06.29:226][920]LogWindows: Error: [Callstack] 0x00007ff8e0c194db UnrealEditor-ObjectDeliverer.dll!UProtocolUdpSocketReceiver::ReceivedData() [D:\build\U5M-Marketplace\Sync\LocalBuilds\PluginTemp\HostProject\Plugins\ObjectDeliverer\Source\ObjectDeliverer\Private\Protocol\ProtocolUdpSocketReceiver.cpp:115]
[2022.05.17-15.06.29:227][920]LogWindows: Error: [Callstack] 0x00007ff8e0c0be69 UnrealEditor-ObjectDeliverer.dll!UE::Core::Private::Function::TFunctionRefCaller<<lambda_8993b94d5aa4af31062aea6c2169b2be>,bool __cdecl(void)>::Call() [D:\RocketSync\5.0.0-19505902+++UE5+Release-5.0\Working\Engine\Source\Runtime\Core\Public\Templates\Function.h:539]
[2022.05.17-15.06.29:227][920]LogWindows: Error: [Callstack] 0x00007ff8e0c1bf28 UnrealEditor-ObjectDeliverer.dll!FODWorkerThread::Run() [D:\build\U5M-Marketplace\Sync\LocalBuilds\PluginTemp\HostProject\Plugins\ObjectDeliverer\Source\ObjectDeliverer\Private\Utils\ODWorkerThread.cpp:32]
[2022.05.17-15.06.29:227][920]LogWindows: Error: [Callstack] 0x00007ff942ba83ab UnrealEditor-Core.dll!UnknownFunction []
[2022.05.17-15.06.29:227][920]LogWindows: Error: [Callstack] 0x00007ff942ba13b0 UnrealEditor-Core.dll!UnknownFunction []
[2022.05.17-15.06.29:227][920]LogWindows: Error: [Callstack] 0x00007ff99c777034 KERNEL32.DLL!UnknownFunction []
[2022.05.17-15.06.29:227][920]LogWindows: Error: [Callstack] 0x00007ff99e742651 ntdll.dll!UnknownFunction []
[2022.05.17-15.06.29:227][920]LogWindows: Error:
[2022.05.17-15.06.29:227][920]LogWindows: Error: Crash in runnable thread ObjectDeliverer UDPSocket PollingThread
Hallo,
thanks again (I already communicated with you a while ago) for your nice plugin!
I have a small issue: Today I made a test with the following setup:
The Windows tool "Packet Sender" was running on my computer and listening as a server to localhost port 50569 for UDP communication.
Now I started my UE project using ObjectDeliverer as a server where I use CreateProtocolUdpSocketReceiver with the same port 50569 and then start the ObjectDelivererManager (all done in Blueprint).
I knew that it would fail because the port is already used. But I wanted to see how ObjectDeliverer would fail. :-)
Result: UE crashed, with the following crash info:
Assertion failed: Socket != nullptr [File:c:\program files\epic games\ue_4.22\engine\source\runtime\networking\public\Common/UdpSocketReceiver.h] [Line: 53]
UE4Editor_ObjectDeliverer_0001!UProtocolUdpSocketReceiver::Start() [c:\users\andreas.lepel\documents\unrealprojectssvn\testudp\plugins\objectdeliverer\source\objectdeliverer\private\protocol\protocoludpsocketreceiver.cpp:27]
UE4Editor_ObjectDeliverer_0001!UObjectDelivererManager::Start() [c:\users\andreas.lepel\documents\unrealprojectssvn\testudp\plugins\objectdeliverer\source\objectdeliverer\private\objectdeliverermanager.cpp:87]
UE4Editor_ObjectDeliverer_0001!UObjectDelivererManager::execStart() [c:\users\andreas.lepel\documents\unrealprojectssvn\testudp\plugins\objectdeliverer\source\objectdeliverer\public\objectdeliverermanager.h:23]
UE4Editor_CoreUObject
Maybe check the pointer and give an error, or abort gracefully?
As I wrote, this was only a test and will not happen frequently, but I thought I should tell you.
Best from Munich
Andreas
I really believe this plugin is what I need to solve an issue for my project.
does anyone have some expertise with this to help me out with some questions, with ingrating with my game Creative Continents on Steam?
Hi there and thank you for your awesome work!
I am using your plugin to synchronize changes to Procedural Meshes between Clients at runtime and for the most part it works beautifully. However, I encountered an issue, when the ProceduralMeshComponent was spawned at Runtime. The following Code works fine for PMCs that were spawned at launch but completely freezes the Unreal Engine if the PMC was spawned at Runtime. Maybe you have an idea how this can be solved.
FProcMeshSection* Section = PMC->GetProcMeshSection(Index);
PMCData->ChangedSections.Add(*Section);
ObjectDeliveryBox->SendTo(PMCData, From, SendStr);
There is no freeze without line 2 and also no freeze without line 3. Also other data from the PMC gets send just fine without freezes. So I think it has to be the Derefencing something that was spawned at Runtime.
Regards, Heiner
Hello, first of all: Thanks so much for your work. It looks a pretty cool plugin.
I ran your sample scene (UDP) and it seems that I send the count correctly.
But when I try to send something from my external application I just see my local IP in the print msg.
I'd like to know how can I print or where I can see my message as a string.
Sorry for the dumb question like this one. But I'm very new to UE4.
thanks
Addition of function to save communication data to log file
Change the structure of UObjectJsonSerializer so that users can easily customize it.
Once created, you can modify ObjectDeliveryBoxUsingJson or create a new DeliveryBox.
About the following description
FProperty Refactor. UProperty are refactored to be FProperty, which means that UProperty is no longer a UObject after this release. Note that this is an API update, and the refactor should go unnoticed by end-users who don't work with the source code.
Hello, for some time i still facing the same issue, but for now i moved from local (which i fixed in past, and even my local wifi network), but for now i facing a mobile hotspot.
My issue is still the same, i can't create a valid bidirectional client-server udp communication.
The client is behind the NAT and makes traversing the ports, i know what the issue is.
There should be
But the problem is i don't know on what port i should listen and also, if i try listen to same port which i bound for sender, it failed because is already in use.
Do i something wrong? It just seems for me I something missleading, cause this must be most trivial thing, which is for sure implemented somehow.
Can you please help me with some response, cause i just can't get it worked.
Hello - I downloaded the sample project, and am able to send UDP data using the UDP sample level (thanks for providing that!) However, for some reason I am unable to receive UDP data using the provided sample blueprint widgets. I can see in Wireshark that the data is coming through on the correct IP address and on the port that's set in the widget (8000), but nothing seems to be coming through in UE5. Are there any additional configuration steps needed to get UDP receiving working? Thanks for the great plugin!
Hello!
I am using Steam for multiplayer.
So when a client connects, after connection to the server it then connects to the second port too through TCP.
It works fine normally, but with Steam's network OSS it fails
I'm assuming that for obvious security reason, the server needs to tell Steam to accept connection on both port, but I have no clue how to actually allow the second connection?
Or is it automatic with FSocket and the answer is somewhere else?
PS : When I connect I correctly user steam.123123123 as the IP
I think this is a bug, or maybe I'm misusing it.
I'm trying to receive big messages (>300kb) with a TCP server in Blueprint. I normally can receive small messages by inspecting the TArray returned by the ReceiveObject blueprint event.
But when the received message is big, the TArray is returned with less bytes than the message sent to the server, and after a first return, another event is triggered, which yield the remaining bytes in the TArray. But my application needs the full message in the buffer (or if this behaviour is intended, I should have any means to know that the message is split, and that I must wait the remaining bytes).
My server is configured with PacketRuleNodivision, and default options.
If you do receive once, it will loop endlessly on the receive method and it won't get out
Hello,
Thank you for making this plugin, it is doing a lot of great things.
However, I am having an issue with the JSON data I am sending and receiving with a custom class. This custom class contains some Arrays of other custom classes which also contain arrays of other custom classes. When I print the JSON as a string or to the log, the data doesn't look like the intended format and instead it almost appears as each element in the array is just a file.
Would love if you can provide some feedback on this. I have included a screenshot of the output.
Please let me know if you need a better explaination.
Make the shared memory correspond to the communication protocol
Hellou, basically I can sent packets with success to my node.js udp server, but i cant successfully receive packet back from the server.
And i mean ANY packet, i tried all of the variants and event is basically never fired :/ Checked by WireShark that packets are really send to valid ports.
Is there any example for server + project which works?
Hi! First, thanks for your effort!
I'm testing the sample TCP server application, and I can send messages from client 1 and 2, which are received by the server and received data is printed.
But if I try to send a packet from applications like Swiddler or Packet Sender, the receive callback from the server seems to do nothing. The breakpoint set on the server's receive event is not hit.
Sniffing with Wireshark, I can see that the packet is sent and the server replies with ACK, but the data is not displayed on Unreal log, like with the clients 1 and 2 from the sample. (I've added some print blocks to log the messages received
, the original example didn't have that)
What can be happening?
Since the received buffer size of the created Socket was used with the default value, it was not possible to store more than 65535 bytes of data.
Consider how to get the IP address of the sender via TCP / IP via UObjectDelivererProtocol
Hello!
I ran a sample project ObjectDelivererTest and for testing the connection I used Hercules. I tried to send a message, but a PrintString did not display anything. While in the UE itself, messages arrive.
On the UE server Deliveler Packet Rule used "Rule Size Body" with SizeLength 4 and SizeBufferEndian Big. DeliveryBox is Utf8StringDeliveryBox.
I suspect that Hercules does not add the size of the message in the header. Then I wrote a simple client on Qt and it partially worked.
The problem is that in most cases there is garbage at the end of the message. I can not understand why.
When using the latest version from Github with UE 4.26.1 the game runs fine on localhost, but crashes on remote (see below).
I am using Header size + body TCP IP server.
When it happens my ODByteSpan 's Buffer look fine but the Length is negative...
Want plug-in support for ue5 version.I prefer the new effect (but the external data cannot enter the engine normally. I hope there is an update.Support ue5
It shows "ObjectDeliverTest could not be compiled. Try rebuilding from source manually."
Any idears? Thanks for your sharing
Hello!
I'm using a really basic network client using ObjectDeliverer with the TCP/IP Client protocol and the PacketRuleSizeBody rule. It all works really well (I let the game send the player position 10 times per second to the server) until the client disconnects after some time without any error or message.
Would appreciate help!
EDIT: I quickly made an empty node.js TCP server just to make sure the problem is on the client side, and it really is. The connection disconnects with the RESET flag after some time...
Hello!
ObjectDeliverer working really well, thank your for that!
But how do I get the result of the ObjectDelivererManager::Start Method to know whether the client successfully connected to the server or not and if not then also the reason of the connection failure.
Thanks in advance
Hi,
I'm still a very happy user of your plugin, and I will now switch to Unreal 4.27.
I can see that you weren't able to invest much work into the plugin in the last months - and I completely understand, as you don't even charge money for it (and even if you did I guess the returns from the Marketplace earnings would be very small).
Question: Do you still plan to maintain the project and update it for new versions? Or should I try to recompile it myself for 4.27 and hope for the best?
Thanks again for your effort,
best from Germany
Andreas
Closing the window in a state of continuing to transmit every tick will fall
I can broadcast UDP packet with my PC using this submask IP address: 192.168.1.255
Unfortunately, this IP doesn’t work on Android.
Supports Open Sound Control
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