kandi X-RAY | BitTorrent Summary
kandi X-RAY | BitTorrent Summary
Computer Networks Project
Top functions reviewed by kandi - BETA
- Main entry point
- Gets piece content
- Put piece
- Request piece
- Launch peer process
- Loads the peer info
- Splits the file into pieces
- Initiate a new connection
- Select the preferred neighbors
- Returns a list of the connections which are interested in the connection
- Get the interested index
- Get the list of Peoked connections
- Returns the boolean value
- Combines the pieces in the temp directory
- Gets the next clear bit from the BitMap
- Compare two bitmaps
- Increments the number of pieces downloaded from a peer
BitTorrent Key Features
BitTorrent Examples and Code Snippets
Trending Discussions on BitTorrent
I am trying to automate downloading of movies with magnet links using the BitTorrent web UI. I can click on the 'add torrent link' button and the popup does appear but after that, the code fails as it is unable to find the element where the torrent link needs to be added. The same problem occurs when I try to input the file location. I tried
time.sleep but had no luck.
My code snippet:...
ANSWERAnswered 2021-Jun-10 at 07:21
Looks like it is in iframe.
iframe like this :
ANSWERAnswered 2021-May-24 at 00:22
First, you need to change add the field named "orders" in Coin document.
Since collisions found in SHA-1, BitTorrent moved to more secure hash function SHA-2, but why not to create hash format representation like magnet:?xt=urn:bt_[hash_function_name]:info_hash ?
It's like 2+2 that people will continue building up more advanced computers. And collisions can be made in near future, and looking into new protocol, we can already see that its adoption is happening very slowly, it wouldn't be nicest thing if say in 2030 new collision occured, then developers will have to change this protocol again?
V1 DHT is not compatible with V2 anyway.
So my noob question goes to @the8472...
ANSWERAnswered 2021-May-18 at 17:14
It's like 2+2 that people will continue building up more advanced computers.
The primary cause for collision attacks is weaknesses in the hash function. Faster computers only provide very modest improvements as for every additional bit you to twice as much compute power. Even the still quite hypothetical general purpose quantum computers would only cut down collision resistance from N/2 to N/3.
Also, collision attacks are not a major threat to bittorrent. They could break certificate based systems built on top of bittorrent, e.g. where some 3rd entity vouches for the correctness of content described by a hash. But the primary use of hashes in bittorrent (integrity, i.e. getting bit-exact copies of whatever the initial seed published) is only vulnerable to preimage attacks.
and looking into new protocol, we can already see that its adoption is happening very slowly, it wouldn't be nicest thing if say in 2030 new collision occured, then developers will have to change this protocol again?
Bittorrent v2 specifies a
meta version field in the info dictionary and requires that clients check for compatibility first before attempting to use the torrent, this will make future upgrades smaller and easier to roll out.
But they are not specified in advance since we don't know which hashes or other security-related changes will be needed in the future. Specifying and negotiating more than one supported cryptographic primitive tends to be error-prone and increases implementation complexity.
The v2 magnet link already provides flexibility by adopting the multihash format.
V1 DHT is not compatible with V2 anyway.
That is incorrect.
While making my first approaches to using
JMH to benchmark my class, I encountered a behavior that confuses me, and I'd like to clarify the issue before moving on.
The situation that confuses me:
When I run the benchmarks while the CPU is loaded (78%-80%) by extraneous processes, the results shown by
JMH look quite plausible and stable:
ANSWERAnswered 2021-May-08 at 09:32
The reason was very simple, and I should have understood it immediately. Power saving mode was enabled in the OS, which reduced the clock frequency of the CPU under low load. The moral is, always disable power saving when benchmarking!
I have a question regarding the bittorrent protocol: Assume we have a private tracker where we register and login to download torrent files/access magnets. We know that clients announce to the tracker to get a list of peers and then the client itself connects to different peers to download separate pieces of the whole file. Once the client finishes downloading or aborts, it sends an AnnounceFinished message to the tracker for stats/graceful shutdown of the client.
Now, let's say the tracker wants to maintain a download/upload rate (like it's commonly done in real trackers) to limit leechers from downloading too much without uploading. How does the tracker get real/legitimate statistics about the download/upload volume of a peer when the actual download/upload only happens between the peers themselves? Do they need to be honest and cooperate and send the right stats to the tracker or can the tracker somehow enforce the correct data?...
ANSWERAnswered 2021-May-02 at 16:17
Do they need to be honest and cooperate
More or less, yes.
or can the tracker somehow enforce the correct data?
Not in the general case of multiple colluding peers. In special cases of a single/few selfish downloaders it may be possible to detect them by cross-checking statistics from multiple peers but this is fragile and will require some fine-tuned heuristics to minimize false positives while still getting decent true positives.
It's basically a kludge, not something the protocol is designed for.
For the downloaded statistic a tracker could also participate in a swarm as a bittorrent peer and see the progress of a client based on
have messages, but that doesn't work for upload and isn't all that reliable either because there's no guarantee that it could connect to all peers in a swarm to observe them.
I have a fair knowledge of BitTorrent protocol. One questions has been bugging me for a while.
Always a seeding client immediately disconnects from another seed. Got a couple of questions there.
- Is the disconnect made on the local side / remote side / both?
- Before the disconnection takes place, are peers exchanged through PEX?
I think if seeds are able to exchange peer info to other seeds through PEX, it will help improve peer discovery...
ANSWERAnswered 2021-Apr-27 at 17:46
The specification does not mandate if and when seeds may disconnect other seeds, although it acknowledges the behavior and allows seeds to include recently seen seeds in its PEX list which should allow downloaders to discover more seeds. The exact timing of disconnects is largely up to implementations.
Disclaimer: I’m not interested in the torrent and the files, don’t know what those are, and haven’t downloaded any one of those.
ANSWERAnswered 2021-Apr-23 at 15:09
Sort based on:
- Whether the item starts with a number
- Then, based on the number of characters in the leading number
- Then, do a natural sort
According to the specification of Bittorrent tracker (https://wiki.theory.org/BitTorrentSpecification) peer is identified by their peer_id and ip. peer_id is passed to tracker in announce request, ip - from request headers, but optionally can be passed as a query parameter. How tracker knows that this request was actually sent from this peer (not a fraud) without any key?...
ANSWERAnswered 2021-Apr-22 at 18:10
Note that the official specification lists that parameter as optional, meaning that it is not part of the identity of the client. Rather it should be considered as a hint to the tracker that the tracker should hand out that IP to other clients instead of the source of the announce connection. This hint should be ignored if the tracker doesn't trust the client.
Trust can be established if a client authenticates itself to the tracker (e.g. via HTTP basic auth or a secret token in the announce URL).
Instead of trusting the client the tracker could also verify it, e.g. by opening a bittorrent connect to the IP and port that was announced and then send a bittorrent handshake for the infohash that was announced to check if the remote can accept bittorrent connections. That also has the advantage of rejecting announces that aren't reachable due to firewalls or NAT limitations.
For open, public trackers neither approach is practical, so they usually ignore the
&ip=... parameter. Trackers deployed in more restricted environments do make use of the trust and/or verify approaches.
TL;DR Is is possible to proxy torrent larger than available local disk while piping it to outbound stream ?
According to BitTorrent spec , all torrents are stored as pieces of equal length , I want to write a node app could pipe the torrent pieces to a http upload stream , does any library provide such functionality ? All the implementation I have found downloads the whole file to local storage then propagate it further which can cause problems when running on small disk and large files ....
ANSWERAnswered 2021-Feb-22 at 18:29
Bittorrent is designed for random access to keep data available via the rarest-first strategy. See Section 2.4.2 of the bittorrent econ paper. While it is possible to operate it in a streaming manner anyway this generally isn't recommended and certainly shouldn't be the default, otherwise performance could severely degrade for all swarm members or content could even become unavailable.
I am trying to build/deploy a tracker server for use with P2P applications using the below code. It works fine locally, but when I deploy it to Heroku, the port bindings fail because only one port is allowed....
ANSWERAnswered 2021-Feb-13 at 06:40
Not long after asking this question, it occurred to me that I might not need
express at all. It turns out that was correct.
For anyone wanting a Heroku-ready bittorrent-tracker, here is the updated code:
No vulnerabilities reported
You can use BitTorrent 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 BitTorrent 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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