p2p | peer file sharing server in C , and client

I am getting "Unexpected end of stream" while using Retrofit (2.9.0) with OkHttp3 (4.9.1)

Retrofit configuration:

I'm using the multipeer connectivity library to establish a p2p connection between an iOS device and a macOS device. The documentation states: "In macOS and tvOS, it uses infrastructure Wi-Fi, peer-to-peer Wi-Fi, and Ethernet."

Is there a way to specify the usage of p2p wifi over infrastructure wifi? If not what are my options for a pure p2p communication between iOS and macOS (other than CoreBluetooth)?

Reference: https://developer.apple.com/documentation/multipeerconnectivity

I'm trying to build a p2p terminal sharing utility where PCs behind a NAT can share their terminals to other PCs behind a NAT through the public internet. (both PCs are on different private network basically). Another requirement is to provide a web based terminal as well ( and hence webrtc seems useful ) .Came across two promising solutions - webrtc and libp2p. But what is the fundamental difference between the two?

PS: ssh Tag might be misleading here. But on a broad level, all I'm trying to do is a make-believe SSH into a system that does not have a public IP

I'm trying to understand how to recover a saved/checkpointed net using tensorflow.train.Checkpoint.restore.

I'm using code that's strongly based on Google's Colab tutorial for creating a pix2pix GAN. Below, I've excerpted the key portion, which just attempts to instantiate a new net, then to fill it with weights from a previous net that was saved and checkpointed.

I'm assigning a unique(ish) id number to a particular instantiation of a net by summing all the weights of the net. I compare these id numbers both at the creation of the net, and after I've attempted to recover the checkpointed net

I am using Arduino UNO and a PN532 NFC module to receive P2P NDEF messages from an Android phone.

I am sending a plaintext string "Hello". When the transfer is successful, I get this on my Arduino: image

How can I extract the string "Hello" (I think the pairs of numbers before it is the "Hello" in hexadecimal, same for the "text/plain" type indication, type length and payload length) from the NDEF message payload into a regular variable?

Here is my Arduino code:

I am working on a p2p application and to make testing simple, I am currently using udp broadcast for the peer discovery in my local network. Each peer binds one udp socket to port 29292 of the ip address of each local network interface (discovered via GetAdaptersInfo) and each socket periodically sends a packet to the broadcast address of its network interface/local address. The sockets are set to allow port reuse (via setsockopt SO_REUSEADDR), which enables me to run multiple peers on the same local machine without any conflicts. In this case there is only a single peer on the entire network though.

This all works perfectly fine (tested with 2 peers on 1 machine and 2 peers on 2 machines) UNTIL a network interface is disconnected. When deactivacting the network adapter of either my wifi or an USB-to-LAN adapter in the windows dialog, or just plugging the usb cable of the adapter, the next call to sendto will fail with return code 10049. It doesn't matter if the other adapter is still connected, or was at the beginning, it will fail. The only thing that doesn't make it fail is deactivating wifi through the fancy win10 dialog through the taskbar, but that isn't really a surprise because that doesn't deactivate or remove the adapter itself.

I initially thought that this makes sense because when the nic is gone, how should the system route the packet. But: The fact that the packet can't reach its target has absolutely nothing to do with the address itsself being invalid (which is what the error means), so I suspect I am missing something here. I was looking for any information I could use to detect this case and distinguish it from simply trying to sendto INADDR_ANY, but I couldn't find anything. I started to log every bit of information which I suspected could have changed, but its all the same on a successfull sendto and the one that crashes (retrieved via getsockopt):

My question is if I plan to use WebRTC with a p2p architecture but only using its custom data channel to send constant small text messages. ¿What is the maximum number of peer connections that a peer can support? (I know this its heavily going to depend on the device, network... of each peer, but could somebody give me a ballpark estimate).

Edit: By constant text messages i mean around 30 / sec

I'm developing a chat application with Electron and would like to run two instances of the same Electron application to run concurrently for debugging purposes.

I used Electron Forge to instantiate the project, which uses port 3000 by default, and attempting to run the same application in another process leads to an address already in use error.

Did some research into this and saw approaches to run the client & application code on different ports, along with how to change the default port on Electron Forge.

I've thought about having the Electron app run on a randomly generated port number to avoid taking up the same port number, but curious whether there's a simpler way to do this.

Error message attached below:

Currently, I am creating a P2P video call application. And I want when I click the open my camera, then the camera will be opened and the media stream will be fed to my video tag. Here is the code, the file index.jsx, some code are suppressed for brevity: