unetstack | Userspace TCP/IP stack | Networking library

by bioothod C Version: Current License: Non-SPDX

X-Ray Key Features Code Snippets Community Discussions(10)Vulnerabilities Install Support

kandi X-RAY | unetstack Summary

unetstack is a C library typically used in Networking applications. unetstack has no bugs, it has no vulnerabilities and it has low support. However unetstack has a Non-SPDX License. You can download it from GitHub.

this is an extremely small network stack implementation, which works on top of new netchannels interface [1]. it was used as a base for linux 2.6 netchannels alternative tcp/ip stack implementation which was proven to be faster than existing linux socket code. project is being actively developed, so there are no stable api, documentation or some other interesting things. for usage examples please see main() function in packet.c file. compilation options. make debug=1 will enable huge amount of debug information make netchannel=1 will use kernel netchannel subsystem instead of packet socket. command line parameters. -s saddr - source address of netchannel -d daddr - destination address -s sport - source port -d dport - destination port. -p proto - protocol number (-6 - tcp (default), -17 - udp). -l

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Support

unetstack has a low active ecosystem.

It has 60 star(s) with 15 fork(s). There are 9 watchers for this library.

It had no major release in the last 6 months.

unetstack has no issues reported. There are no pull requests.

It has a neutral sentiment in the developer community.

The latest version of unetstack is current.

Quality

unetstack has no bugs reported.

Security

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

License

unetstack has a Non-SPDX License.

Non-SPDX licenses can be open source with a non SPDX compliant license, or non open source licenses, and you need to review them closely before use.

Reuse

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

Installation instructions are not available. Examples and code snippets are available.

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unetstack Key Features

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unetstack Examples and Code Snippets

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Community Discussions

Trending Discussions on unetstack

Creating a communication between client and server node in unetstack using UnetSocket

Response to Remote access to Unet Agents for GNURadio

How to find the address and location coordinates of the neighbouring nodes?

How do i record JANUS signal as wav file?

How to write Modem Drivers for non-subnero modems?

Is there a way to supply bathymetry to the custom channel?

How to connect a Python UnetSocket to an Agent that I have created using agentForService?

bin/unet audio not works with ubuntu18.04

How to achieve transmitting arbitrary signal based on a schedule

Configuring a 2-node simulation in IntelliJ IDEA

QUESTION

Creating a communication between client and server node in unetstack using UnetSocket

Asked 2021-Apr-28 at 06:25

I am new to this domain of UnetStack and would appreciate help from the experts.

I have created a small network of 4 nodes. I am trying to connect my client node, e.g. node B, to the server node (A). I tried the communication between them through the shell. I was successful in it. But I am facing errors when I tried the same through agents. Basically, my client agent holds socket code for the client and the same case is for my server. My aim is to make fully functional communication between client and server nodes.

I created a server agent, and the client agent added those agents to the respective stacks of nodes. In the above-mentioned agents, I tried to implement my server socket code and client socket code in the respective agent's .groovy file. The server agent is added in the setup file named setup1.groovy while the Client agent is added in the setup2.groovy. The path to these respective files is mentioned in the respective node's stack section in the simulation script. But still, I am facing the following error:

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ANSWER

Answered 2021-Apr-28 at 06:25

The important part of the error you are seeing is

Source https://stackoverflow.com/questions/67294584

QUESTION

Response to Remote access to Unet Agents for GNURadio

Asked 2021-Mar-12 at 03:13

I was wondering what did the Unetstack agent expect as a response to a TCP connection which is established to the modem at ip:port ?

I was trying to connect to the the modem using the TCP connection through the GNURadio pdu socket. The connection was established but i think after handshaking, it was automatically terminated. Did it expect something ?I am planning to send custom messages to modem using this APIs.

Here is what i have done so far.

I opened a TCP connection using Socket PDU block using below flow graph.

I used unet audio SDOAM to test:

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ANSWER

Answered 2021-Mar-12 at 03:13

The JSON protocol used by UnetStack is from fjåge. The full specification of the protocol can be found here: https://fjage.readthedocs.io/en/latest/protocol.html

The protocol expects an acknowledgement to the {"alive": true} JSON message within a short timeout (5 seconds). If it receives no acknowledgement, it will close the connection, assuming that the connecting party is not responsive. The correct acknowledgement is a {"alive": true} sent back to confirm that the connection is indeed alive.

The above handshake is designed to cater for other transports such as RS232 where a disconnection can only be detected by communicating over the connection.

Source https://stackoverflow.com/questions/66576441

QUESTION

How to find the address and location coordinates of the neighbouring nodes?

Asked 2021-Feb-08 at 04:16

I am implementing an algorithm in UnetStack and I am trying to write an agent to get the required parameters from the neighbouring nodes. I want to send a broadcast message to all neighbouring nodes and these neighbouring nodes should reply with their address and location coordinates.How can I implement this ? I know that I need to access the NodeInfo service of the neighbouring nodes but not sure what servive / protocol to follow for broadcast transmission and reception.

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ANSWER

Answered 2021-Feb-08 at 04:16

There are several ways to do this:

You can send RangeReq with requestLocation set to true. This requests a peer node to transmit it's location coordinates back. On success, you'll receive a RangeNtf with the location field filled in.

Example shell session using a 2-node network:

Source https://stackoverflow.com/questions/66033080

QUESTION

How do i record JANUS signal as wav file?

Asked 2020-Dec-03 at 18:20

I am testing an interoperability between modems. one of my modem did support JANUS and I believe UnetStack base Subnero Modem Phy[3] also support JANUS. How can i send and record JANUS signal which i can use for preliminary testing for other modem ? Can someone please provide basic snippet ?

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ANSWER

Answered 2020-Nov-27 at 06:56

UnetStack indeed has an implementation of JANUS that is, by default, configured on phy[3].

You can check this on your modem (the sample outputs here are from unet audio SDOAM, and so your modem parameters might vary somewhat):

Source https://stackoverflow.com/questions/65027940

QUESTION

How to write Modem Drivers for non-subnero modems?

Asked 2020-Nov-25 at 11:28

How can i use the existing modems which is not subnero with UnetStack (basically is not support UnetStack natively) ? I was gone through the post in detailed, but unfortunately had bad compilation issues. Can anyone point me to right direction ?

Below is the detailed error i encountered:

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ANSWER

Answered 2020-Nov-24 at 02:21

@manuignatius is right, Groovy complains about this when there is a syntax error in a dynamically loaded Groovy class.

To get a more detailed stack trace on the error, you can manually invoke the Groovy compiler. Set your CLASSPATH environment variable to include all the jars in the lib folder in your local UnetStack installation. Then simply run groovyc MyModemDriver.groovy, and it should show you compilation errors, if any. The compiled .class file that is produced on successful compilation can then be copied to the classes folder in UnetStack/modem instead of the source code.

Source https://stackoverflow.com/questions/64973662

QUESTION

Is there a way to supply bathymetry to the custom channel?

Asked 2020-Oct-18 at 11:39

I am running underwater simulations using UnetStack Simulator. By default the simulations uses one of either ProtocolChannelModel or BasicAcousticChannel. Documentation

Let's say I provide GPS coordinates to the nodes. How can i provide the Bathymetry in the simulation to make it more reasonable ? I am planning to use the GEBCO 2019.

Is there a way to do that ?

...

ANSWER

Answered 2020-Oct-18 at 11:39

Not out of the box, but it should be relatively simple to implement with a custom channel implementation (see section "Developing custom channel models" in the Unet handbook).

Outline:

Implement your own acoustic model (e.g. MyAcousticModel):

Source https://stackoverflow.com/questions/64404131

QUESTION

How to connect a Python UnetSocket to an Agent that I have created using agentForService?

Asked 2020-Mar-31 at 15:59

I am trying to make a link between a Python script and a simulation running on UnetSim. I want to send messages from Python and receive them in UnetStack using a Python_Agent.groovy that I created and added to container of each node in the simulation. I also want to do the reverse.

I used the fjage documentation (https://buildmedia.readthedocs.org/media/pdf/fjage/dev/fjage.pdf) to help me. The problem is that in gateway class Services there is not the PYTHON_AGENT Service that I created. I can understand that as my enum Services does not modified class Services where there are NODE_INFO, PHYSICAL etc... My question is then how the example in the documentation 1.6.3 works ? And is it applicable to my case ?

Here is my code :

PythonSocketExample.py

...

ANSWER

Answered 2020-Feb-28 at 05:57

A few problems in your original code:

You don't need to create a service, since you can address the agent by its name. This should be sufficient for your example here.
To process a request (DatagramReq from your Python code), you should override the processRequest() method in the agent.

Here's a simplified example based on your original code:

PythonAgent.groovy:

Source https://stackoverflow.com/questions/60437685

QUESTION

bin/unet audio not works with ubuntu18.04

Asked 2019-Dec-12 at 06:48

When I ran the unetStack package in ubuntu18.04, an error was occurred. The error information is "Native library yoda_phy_pa_amd64 not found".

I have install the java environment correctly. And I saw the lib related to yoda_phy_pa_amd64 in unet3.0.0/lib dir named with libyoda_phy_pa_amd64.so. I copy the file to usr/lib and usr/local/lib, it still not works and show the same error information "Native library yoda_phy_pa_amd64 not found".

Install java environment, sudo apt-get install openjdk-8-jre Obtain the authority of the dir, sudo chmod 777 -R unet-3.0.0 Run the audio demo, bin/unet audio

I expect the audio demo will be work, and show the GUI in the browser. I have successfully run the demo in another computer with ubuntu16.04. But I don't know why it does not works.

...

ANSWER

Answered 2019-Dec-12 at 06:48

This package worked for me!

Source https://stackoverflow.com/questions/58617118

QUESTION

How to achieve transmitting arbitrary signal based on a schedule

Asked 2019-Nov-02 at 06:30

In my case, I want to wake up the subnero modem in specific time and transmit the signal generated by myself. According to the unetStack handbook Chapter 25, scheduler module has the ability to organize the modem wakeup at a specific time. So I tried to test the modem by using follow groovy script. Without no doubt, it not works.

...

ANSWER

Answered 2019-Nov-02 at 06:30

You're on the right track, but have some details incorrect. If I understand correctly, you want to sleep for 5 minutes and then transmit a signal 5 times with a delay of 5 seconds between transmissions.

If so, I would do something like this on the shell:

Source https://stackoverflow.com/questions/58664641

QUESTION

Configuring a 2-node simulation in IntelliJ IDEA

Asked 2019-Oct-13 at 11:42

I'd like to set up a network simulation in IntelliJ IDEA. To do this I'm trying configure the IDE to use the 2-node-network.groovy script included in the package. I can run the simulation script and access the modems through the web interface but some shell commands such as 'tell', 'host' etcetera will not work.

The steps I've taken so far:

Configure an environment variable in the IDE to point to the Unetstack home directory (unet_home=.../unet-3.0.0/)
Made a new run configuration in the IDE with code copied from the 2-node-network.groovy script but changed the home variable:

...

ANSWER

Answered 2019-Oct-13 at 11:42

During the shell startup process, the commands are loaded from etc/fshrc.groovy file. It seems that this file execution failed, probably because it could not be found.

The system property that is used by the initialization script for finding etc is unet.home (not unet_home). That is usually set in the bin/unet shell script from the environment variable UNET_HOME when starting up Java:

Source https://stackoverflow.com/questions/58320067

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