Questions tagged [networking]
Any kind of communication between computers using a protocol and the infra-structure that allow this communication.
66 questions
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Is it legal to make a custom client from scratch for a game with SDK?
What I'm going to do is writing a client for Half-Life, that can connect to a server, process it's packets and reply with new packets, as if it was a normal game's client. There's plenty of custom ...
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The opaque value of NEFilterPacketContext struct in macOS network extension
I'm using NEPacketFilterProvider, which intercept all outgoing/incoming packets from all interfaces and protocols. on packet event I get callback to PacketHandler which has the following signature :
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Getting corrupted video stream when Reverse Engineering UDP video stream from cheap Indian WiFi camera Drone
I have this Quadcopter "Garuda" that can stream video to an Android APP named VS FPV PRO over wifi. Here is the video.
I wanted to receive the video stream on my laptop to run some computer ...
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Reverse engineering MQTT payload in a (apparently) sophisticated smart lamp
Background
I have recently bought a (quite expensive) smart lamp. It is not from a known producer, it's a relatively small company, but they seem to have implemented MQTT in a quite serious way.
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How would you go about understanding the networking of a game and doing your own server?
I'm trying to reverse the network of a game. The commands are strings, however, it's not as easy as getting the function that encrypts the packet, as it's not encrypted, just encoded in its own way, ...
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missing caller function in call stack
I'm trying to intercept and locate tcp packets in memory through debugging of windows 10. Suppose I set a break point at TcpReceive, the call stack looks like this
kd> kc
# Call Site
tcpip!...
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How can I extract the timestamp from this bytestring?
I am missing a piece of the puzzle that is the TCP protocol the Battlefield Bad Company games use to transfer dogtag records to/from the FESL backend. The general packet structure is quite clear and I ...
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Malware analysis - Debugger hangs at HttpSendRequestA
I'm reverse engineering a malware that at some point tries to connect to http://api.ipify.org in order to get the IP address of the infected PC.
I was able to replicate this behaviour with a small ...
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Decoding the Apple vendor tag in the 802.11 beacon
Background
Looking to answer Is there a way to detect if you're connected via a shared WiFi Hotspot? on apple.stackexchange.com lead me to How does iOS and OS X detect when a Wi-Fi network is a ...
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How to re-create media file from android sender output stream
I would like to perform dynamic analysis on some android apps to check if these apps sending metadata with media files or not.
Ideas like the picture below:
Step 1: I prepared an image with metadata (...
- 121
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Understanding gRPC message
Problem
I intercepted a gRPC network request from an application, and I intend to modify the contents and resend the message programmatically. As no tools (except for MitmProxy, see below) were able ...
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Where is Zyxel nas326 system log files. and how to see failed login ip
Does anyone know where is log files in the Zyxel nas326? I want to send failed tcp login ip to my server so I know if someone is logging in to my nas and I can block the ip.
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Identifying the source of encryption used by UDP packets in a PCAP file
I have a PCAP file (mediafire link to the file) which basically represents packet captures between 2 machines running the same game connected to each other via LAN inside RPCS3 using RPCN.
One of ...
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Help MMO Tcp Packet
I'm trying re-send the packets that an MMO sends to the server just to learn more about packets. The game uses TCP.
I sent the same message in the game chat "oi"
to analyze the packages sent ...
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Interpreting Response for Modbus/TCP function code 0x08 Diagnostics
A client application sends a Modbus 0x08 diagnostics query to Schneider modicun PLC over TCP/IP. The software describes itself as designed for Modicon Micro/Compact/Quantum/Momentum/584/984.
Payload ...
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