tcp | Experimental user space TCP stack | TCP library

by uNetworking C Version: Current License: No License

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kandi X-RAY | tcp Summary

tcp is a C library typically used in Networking, TCP, Nodejs, Unity, Docker applications. tcp has no bugs, it has no vulnerabilities and it has low support. You can download it from GitHub.

Experimental user space TCP stack

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Quality

Security

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Support

tcp has a low active ecosystem.

It has 35 star(s) with 3 fork(s). There are 6 watchers for this library.

It had no major release in the last 6 months.

There are 1 open issues and 0 have been closed. There are no pull requests.

It has a neutral sentiment in the developer community.

The latest version of tcp is current.

Quality

tcp has no bugs reported.

Security

tcp has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

License

tcp does not have a standard license declared.

Check the repository for any license declaration and review the terms closely.

Without a license, all rights are reserved, and you cannot use the library in your applications.

Reuse

tcp releases are not available. You will need to build from source code and install.

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tcp Key Features

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tcp Examples and Code Snippets

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Community Discussions

Trending Discussions on tcp

Rust futures / async - await strange behavior

While loop doesn't exit after file download

Angular in Kubernetes failing to pull image

AWS ubuntu iptable port forwarding between its two interfaces

How to test stream-based API in .NET

IPV6 socket's local address not on interface

RXKOTLIN/RXJAVA: Communication between the socket using Observables

IO Completion port returning NULL Completion Key

`docker services ls` shows running services but `docker ps -a` is missing running containers? Where are the other missing running containers listed?

How to connect to IBM MQ deployed to OpenShift?

QUESTION

Rust futures / async - await strange behavior

Asked 2021-Jun-15 at 20:06

I am new to rust and I was reading up on using futures and async / await in rust, and built a simple tcp server using it. I then decided to write a quick benchmark, by sending requests to the server at a constant rate, but I am having some strange issues.

The below code should send a request every 0.001 seconds, and it does, except the program reports strange run times. This is the output:

...

ANSWER

Answered 2021-Jun-15 at 20:06

You are not measuring the elapsed time correctly:

total_send_time measures the duration of the spawn() call, but as the actual task is executed asynchronously, start_in.elapsed() does not give you any information about how much time the task actually takes.
The ran in time, as measured by start.elapsed() is also not useful at all. As you are using blocking sleep operation, you are just measuring how much time your app has spent in the std::thread::sleep()
Last but not least, your time_to_sleep calculation is completely incorrect, because of the issue mentioned in point 1.

Source https://stackoverflow.com/questions/67990757

QUESTION

While loop doesn't exit after file download

Asked 2021-Jun-15 at 18:57

I've got the following code to download a file being transmitted over TCP:

...

ANSWER

Answered 2021-Jun-15 at 09:31

TCP/IP connections are designed to be long-lived streaming connections (built on top of the out-of-order, no-guarantee, packet-based IP protocol).

That means that is.read(bytes) does exactly what the spec says it will: It will wait until at least 1 byte is available, OR the 'end of stream' signal comes in. As long as neither occurs (no bytes arrive, but the stream isn't closed), it will dutifully block. Forever if it has to.

The solution is to either [A] pre-send the size of the file, and then adjust the loop to just exit once you've received that amount of bytes, or [B] to close the stream.

To close the stream, close the socket. It kinda sounds like you don't wanna do that (that you are multiplexing multiple things over the stream, i.e. that after transfering a file, you may then send other commands).

So, option A, that sounds better. However, option A has as a prerequisite that you know how many bytes are going to come out of inputStream. If it's a file, that's easy, just ask for its size. If it's streamed data, that would require that, on the 'upload code side', you first stream the whole thing into a file and only then stream it over the network which is unwieldy and potentially inefficient.

If you DO know the size, it would look something like (and I'm going to use newer APIs here, you're using some obsolete, 20 year old outdated stuff):

Source https://stackoverflow.com/questions/67983348

QUESTION

Angular in Kubernetes failing to pull image

Asked 2021-Jun-15 at 12:42

I created an image and pushed to dockerHub, from an angular project. I can see that if I will go to localhost:80 it will open the portal. This are the steps:

...

ANSWER

Answered 2021-Jun-14 at 15:35

Your repository is private and requires login to pull image.

You need to create a registry credentials secret for kubernetes, as it do not uses docker credentials.

See https://kubernetes.io/docs/tasks/configure-pod-container/pull-image-private-registry/

1. Create a secret named regcred:

Source https://stackoverflow.com/questions/67972063

QUESTION

AWS ubuntu iptable port forwarding between its two interfaces

Asked 2021-Jun-15 at 11:24

I have an AWS ubuntu instance with the following network interfaces:

ens5, ip: 172.XX.XX.XX

A5TAP, ip:192.168.233.1 (VPN)

How do I udp port forward port 10000-10200 to 192.168.233.52:10000-10200? I tried a the obvious commands below for a single port 10009, but it is not working:

...

ANSWER

Answered 2021-Jun-15 at 11:24

I believe what you want is the following:

Source https://stackoverflow.com/questions/67959293

QUESTION

How to test stream-based API in .NET

Asked 2021-Jun-15 at 05:30

I'm developing internal messaging protocol that is based on TCP. Everything works, but I want to add tests to it.

It is possible to test serialization/deserialization with MemoryStream, but I can't find a way to test this thing as whole - with contiguous message interchange, because MemoryStream "ends" after reading first message.

The question: Is there a stream that behaves like NetworkStream (duplex, ends only when other end closed, can't seek) in base library or any nuget package?

Currently I can start 2 TcpClients and use them, but I think it have too much overhead for tests especially when there's hundreds of tests running simultaneously

...

ANSWER

Answered 2021-Jun-15 at 05:30

This is what I've been looking for Nerdbank.Streams.FullDuplexStream

Source https://stackoverflow.com/questions/67946260

QUESTION

IPV6 socket's local address not on interface

Asked 2021-Jun-14 at 21:26

When creating a TCP6 socket and connecting to a server, the local address choosen for the socket is not on any of the host's interfaces. Why the difference?

In the example below, the host's eth0 IPV6 address is fe80::10ff:36ff:fef5:611d. Since the client is connecting from fe80::10ff:36ff:fef5:611d%eth0 I would expect the socket's local address to be the same. However netstat shows it is fe80::10ff:36ff:f.

...

ANSWER

Answered 2021-Jun-14 at 21:26

The address is truncated. Try using netstat with -l

Source https://stackoverflow.com/questions/67977348

QUESTION

RXKOTLIN/RXJAVA: Communication between the socket using Observables

Asked 2021-Jun-14 at 18:21

I am a newbie to RXKotlin/RXJava. I am developing the background service in Android.

In my service, I have

Bluetooth socket
TCP Socket

Whenever the data is available on the Bluetooth socket, read and write to the TCP socket. And whenever data is received in the TCP socket, write to the Bluetooth socket.

Can someone help me:

how to achieve this using Observables?
how to exchange the socket id information?
how to exchange the data? Thanks

...

ANSWER

Answered 2021-Jun-14 at 08:16

Please try using RxSubjects (https://blog.mindorks.com/understanding-rxjava-subject-publish-replay-behavior-and-async-subject-224d663d452f)

Let me take PublishSubject as an example here.

Source https://stackoverflow.com/questions/67960660

QUESTION

IO Completion port returning NULL Completion Key

Asked 2021-Jun-14 at 14:36

First time using IO Completion Ports. I'm having an issue where the GetQueuedCompletionStatus returns a Null for the Completion Key, which I am using to pass a data struct with handles for other portions of the code. The GetQueuedCompletionStatus seems to be triggering off messages received just fine otherwise.

I tried to include just the code involving the IO Completion ports:

The Data Structs:

...

ANSWER

Answered 2021-Jun-14 at 14:36

Any Ideas why the IOCP is not passing the Completion Key?

of course it passing back exactly what you pass to CreateIoCompletionPort and I/O in place pointer to OVERLAPPED

but at first

Source https://stackoverflow.com/questions/67964718

QUESTION

`docker services ls` shows running services but `docker ps -a` is missing running containers? Where are the other missing running containers listed?

Asked 2021-Jun-14 at 12:58

The wordpress service is running confirmed by docker service ls and the blog is up when visiting the blog url (which gets taken down after executing docker stack rm wordpress).

Once wordpress is deployed using docker stack deploy the stack looks like this:

...

ANSWER

Answered 2021-Jun-14 at 12:58

You're using Docker Swarm which can run over multiple nodes in cluster mode.

A plausible scenario is that traefik is running on the node where you're executing the docker ps -a command and the other containers are running on different node/s.

To confirm that there is more than one node you can try and execute docker node ls. I can't think of any other scenario where you have a running service, but only one of the containers is visible (and you have a single host).

Source https://stackoverflow.com/questions/67970344

QUESTION

How to connect to IBM MQ deployed to OpenShift?

Asked 2021-Jun-14 at 11:05

I have a container with IBM MQ (Docker image ibmcom/mq/9.2.2.0-r1) exposing two ports (9443 - admin, 1414 - application).

All required setup in OpenShift is done (Pod, Service, Routes).

There are two routes, one for each port.

pointing to the ports accordingly (external ports are default http=80, https=443).

Admin console is accessible through the first route, hence, MQ is up and running.

I tried to connect as a client (JMS 2.0, com.ibm.mq.allclient:9.2.2.0) using standard approach:

...

ANSWER

Answered 2021-Jun-12 at 11:32

I'm not sure to fully understand your setup, but"Routes"only route HTTP traffic (On ports 80 or 443 onyl), not TCP traffic.
If you want to access your MQ server from outside the cluster, there are a few solutions, one is to create a service of type: "NodePort"

Doc: https://docs.openshift.com/container-platform/4.7/networking/configuring_ingress_cluster_traffic/configuring-ingress-cluster-traffic-nodeport.html

Your Service is not a NodePort Service. In your case, it should be something like

Source https://stackoverflow.com/questions/67926772

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

Vulnerabilities

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Install tcp

You can download it from GitHub.

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