PeerToPeerFileSender | Peer to peer file sender on Java
kandi X-RAY | PeerToPeerFileSender Summary
kandi X-RAY | PeerToPeerFileSender Summary
Peer to peer file sender on Java, First Run FTServer then ExampleGUI HOW IT WORKS? In general, the system should work as follows. In the system, one designated machine, let’s call it FileTracker (FT), should always be on and waiting for others’ (peers) requests. FT should contain information about the files which are shared by online peers and information about the peers. If a peer A wants to download a file X, A asks FT to send information about the online peers that share X. If there exist peers that share X, FT sends information about these peers and files to A (Note that different files with the same name may exist (difference could be in size, type, etc.)). A connects to one of the peers that it has received from FT and may download from X that peer. The rest explains how the system should work in detail. See Figure 1 for illustration. • The IP address of FT and the port number on which the application is running should be public, i.e., users should know the IP address and port number of FT. • When a peer A connects to FT, A should automatically send information about its shared files (up to 5 files) as a list of records to FT in the following format: . A should send “HELLO” and receive “HI” before sending the information. • If A does not send any file information to FT while joing the system, i.e., if A does not share any file, then FT should not accept A. FT should not respond to A. • Only accepted peers should be able to use the services offered by this system. • When A wants to download a file with the name “File Name”, A requests the file from FT by sending “SEARCH: ” + “File Name”. • When FT receives “SEARCH: ” + “File Name”, it tries to find the file in a hash table where ‘key’ is filename and ‘value’ is a list which contains records of this format: . – If FT finds the file, it should send “FOUND: ” + list of records + corresponding peer scores. – If FT does not find the file, it should send “NOT FOUND”. • After receiving a list of records, A should choose one of the peers (records) from the list, say B, and connect to B (using IP and port number) to request and download the file. For that A should send “DOWNLOAD: ” + “FileName, type, size” to B. • When B receives a “DOWNLOAD” message, it should generate a random number 1 ≤ p ≤ 100, and if p < 50, then A sends “FILE: ”+file, otherwise sends “NO!”. In other words, as mentioned earlier, B may not send the requested file to A. This requirement is just to test the scoring method of this system. • The scoring method is used to evaluate peers trustworthiness. The method works as follows: FT keeps track of two variables - ‘NumOfRequests’ and ‘NumOfUploads’ for each peer. The score of a peer is then NumOfRequests’/‘NumOfUploads’ in percentage (round if the result is not an integer). For example, if the values are 3/5, then the score is 60 (%). Assume peer A requests a file from peer B. – If B sends the requested file to A, A will send “SCORE of ”+IP Addr of B+“ : 1” to FT. – If B does not send the requested file to A, A will send “SCORE of ”+IP Addr of B+“ : 0” to FT. – When FT receives “SCORE of ”+IP Addr of B+“ : n”, it increments ‘NumOfRequests’ by 1 and increments ‘NumOfUploads’ by n of B. • When A wants to leave the system, A should notify FT about this so that FT can update the hash table accordingly. A should send “BYE” to FT to do so. • FT should also store a list of all peers that have joined the system at least once. A peer in the list should include the following information: . FT should keep the information about a peer even the peer leaves the system. You can use HashMap for this.
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Top functions reviewed by kandi - BETA
- Start the example GUI
- List files in a folder
- Get IP address
- Remove all files with the given IP and port
- The IP address
- Returns the port number
- User pressed action button
- Compares this object to another
- Returns a string representation of this number
PeerToPeerFileSender Key Features
PeerToPeerFileSender Examples and Code Snippets
Community Discussions
Trending Discussions on Networking
QUESTION
I have this code to send multicast messages to a group. There are no errors while running the program but when I monitor packets in Wireshark the ethernet destination of my packets are of my default gateway instead of something like 01-00-5e-xx-xx-xx
The code:
...ANSWER
Answered 2022-Mar-10 at 14:07244.244.244.1 is not a valid multicast address.
Multicast address are in the range of 224.0.0.1 - 239.255.255.255. The address you're sending to is not in that range. So the outgoing MAC address is not a multicast MAC.
Change the destination IP to be in the range of multicast IP addresses and you'll see a proper multicast MAC address.
QUESTION
How to extract street graph or network from OpenStreetMap ?
...ANSWER
Answered 2022-Feb-17 at 15:56There are many solutions to achieve this goal, I listed some of them below.
- Overpass-apiOverpass-api & overpass-turbo let you use overpass query language to collect ways and nodes of type highway for a city :
QUESTION
I have a UDP sender program here:
...ANSWER
Answered 2022-Jan-14 at 08:46When I tried to change the destination ip address to 255.255.255.255 [broadcasting?]
QUESTION
I have an app (sveltekit) running inside and would like to access it from other devices on my local network.
I can access it normally from the host machine on localhost:3000.
I want to access it somehow from another machine on the local network. Is this possible? Sveltekit cli has --host flag, which outputs the following:
...ANSWER
Answered 2022-Jan-01 at 05:35All that was needed was to change the following VSCode setting. By default it was set to "localhost". Setting it to "allInterfaces" grants access to other devices on the local network.
QUESTION
I am looking for a basic thing yet I have not found not even a single good documentation on getting it done.
I want to allocate a floating IP, then associate it to a network interface of a droplet other than eth0. The reason is I want to have the ability to very easily switch from one IP to the other with a programming language.
In a few words, I want to be able to do these two commands and both should provide a different response.
...ANSWER
Answered 2021-Nov-27 at 00:12In the cloud (AWS. GCP etc.) ARP is emulated by the virtual network layer, meaning that only IPs assigned to VMs by the cloud platform can be resolved. Most of the L2 failover protocols do break for that reason. Even if ARP worked,the IP allocation process for these IPs (often called “floating IPs”) would not integrate with the virtual network in a standard way, so your OS can't just "grab" the IP using ARP and route the packets to itself.
I have not personally done this on Digital Ocean, but I assume that you can call the cloud's proprietary API to do this functionality if you would like to go this route.
See this link on GCP about floating IPs and their implementation. Hope this is helpful.
Here's an idea that needs to be tested:
- Let's say you have Node1(10.1.1.1/24) and Node2(10.1.1.2/24)
- Create a loopback interface on both VMs and set the same IP address for both like (10.2.1.1/32)
- Start a heartbeat send/receive between them
- When NodeA starts it automatically makes an API call to create a route for 10.2.1.1/32 and points to itself with preference 2
- When NodeB starts it automatically makes an API call to create a route for 10.2.1.1/32 and points to itself with preference 1
- The nodes could monitor each other to withdraw the static routes if the other fails. Ideally you would need a 3rd node to reach quorum and prevent split brain scenarios, but you get the idea right?
QUESTION
I have a dataframe in R similar to the following:
...ANSWER
Answered 2021-Sep-14 at 04:44I really love a base R solution, so that's what you'll get from me. It's a bit hacky and ad hoc but it seems to get the job done pretty quickly.
QUESTION
I've been trying to wrap my head around this issue all day, could someone help resolve or at least explain it as if I'm a child?
I have an Ubuntu 16 server, running openssl 1.1, & letsencrypt
R3 support expired last night and now an application doesn't work on all devices because it's intermediate signature is from R3 ?
I've removed the X3 from my cert chain providers and generated fresh SSLs with letsencrypt but it has not solved the issue.
...ANSWER
Answered 2021-Sep-30 at 22:32Okay, what I did was to use this config in getssl.cfg
QUESTION
I have been running a media cluster for sometime without any issues. I have everything networked into two different docker networks... the first network just bridges the docker instance to the local machine, the second network is a docker VPN container that I use for the other media services (an earlier version of what I am working on can be found here: https://github.com/Xander-Rudolph/MediaDocker)
The strangest thing happened today though. I ran the docker update for windows and now docker spools up without any errors or issues, however none of the services work outside of the machine running docker. Usually I have a poke through for a couple of the services in my router (namely wordpress/joomla which is on the bridge) and they work outside of my local network, but none of them are working anymore. I was able to confirm its not the DNS A record because I'm able to use the RDP ports I have mapped for my router, and when I test on another machine in the same network, it can't access the services via the internal IP (but it can RDP).
Anyone have any idea what could have changed to break this? I've already updated all my docker images and even rebuilt my VPN container (before I realized its a networking issue). What are some steps I can do to try to troubleshoot what is going wrong in docker to prevent access outside of localhost?
Update
I've been able to rule out the docker update as the root cause... I upgraded docker on my laptop (which was previously running the same version as my desktop) and its not having the same issue... this configuration must be localized to this desktop... No idea what the issue is... Will try a linux VM on the desktop instead of docker for windows...
Update 2
After a lot of screwing around in both a VM and in WSL, I'm still only able to access the docker services from localhost but not a different machine on my network or via the IP on the host machine (perhaps something similar to this: Can't access localhost via IP address). RDP does work so the computer is accessible but the services are not.
I'm not sure if this is a result of a docker networking config or a windows network config (I'm using WSL with docker installed on ubuntu 20.08) but I'm not seeing anything stick out. I'm going to remove the tag for docker windows but this is definitely an issue with networking and I suspect it has something to do with the fact that the containers are running behind a VPN... although I don't know why I would be able to access them on localhost but not the IP on another VM...
When I run
...ANSWER
Answered 2021-Sep-21 at 02:43Your question: "...What are some steps I can do to try to troubleshoot what is going wrong in docker to prevent access outside of localhost?..."
Troubleshooting help for you, first do you have multiple networking adapters (Ethernet, Wi-Fi, etc.) present on the host. First ensure, the priority of these adapters needs to be configured in correct order so the Windows networking stack can correctly choose gateway routes.
Now, to fix this set your primary internet-connected networking adapter to have the lowest InterfaceMetric value, use can use these Powershell commands from an elevated console:
QUESTION
Hi, I've remixed a template for networked aframe dynamic rooms using a form:
https://glitch.com/edit/#!/power-lily-pancake?path=public%2Fscene.html%3A41%3A0
For some reason whenever I add these lines of code to the tag, the entire project breaks:
ANSWER
Answered 2021-Sep-17 at 15:17afaik the dynamic-room component is designed to attach the networked-scene, not update it (since it doesn't handle updates). That's why the dynamic-room example scene does only have a dynamic-room component, and also why the dynamic-room is not working with networked-scene.
I'd throw all the networked-scene attributes to the dynamic-room setup, but it's also possible to make the two work together pretty much like you want it:
QUESTION
I want to obtain a list of mutually connected nodes between every pair of nodes in my graph:
...ANSWER
Answered 2021-Sep-10 at 19:00This is not exactly efficient, it's a brute force double loop, but you can do
Community Discussions, Code Snippets contain sources that include Stack Exchange Network
Vulnerabilities
No vulnerabilities reported
Install PeerToPeerFileSender
You can use PeerToPeerFileSender like any standard Java library. Please include the the jar files in your classpath. You can also use any IDE and you can run and debug the PeerToPeerFileSender component as you would do with any other Java program. Best practice is to use a build tool that supports dependency management such as Maven or Gradle. For Maven installation, please refer maven.apache.org. For Gradle installation, please refer gradle.org .
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