Error "No such device" in call setsockopt when joining multicast group

I have a code in which send multicast datagrams. A critical piece of code: uint32_t port; int sockfd, err_ip; const uint32_t sizebuff = 65535 - (20 + 8); unsigned char *buff = (unsigned char *)...

Efficiently introspecting Python object IP address instance ownership

In the code below, I am trying to find a way to eliminate self.owner from the L3Address() class... the idea is that I want to know who owns the IP address on a given Vlan or Interface without...

Upload or Download from/to ftp server: Android Client

I'm working on android project to test FTP functions both upload or download files. Here's my first try code based on this tutorial: public void onCreate(Bundle savedInstanceState) { ...

tftp retry timeout exceeded

My issue is retry count exceeds when I download kernel image to Econa processor board (Econa is ARM based processor) via TFTP as shown below CNS3000 # tftp 0x4000000 bootpImage.cns3420.uclibc MAC...

Socket programming between client in C#.NET and server in C

Here I would like to ask how to create communication through socket programming between client (on Windows, using C#.NET) and server (on Ubuntu, using C). I have done successfully if the...

CORS with socket.io

I'm having trouble with CORS on a node.js app using express.io. I'm hosting the socket.io client js remotely since this needs to works as a remote app. <script...

socket.io - can't get it to work, having 404's on some kind of polling call

I'm trying to get a server set up with socket.io, with bad results. I am mostly following this guide, although it's somewhat out of...

Ansible loop over variables

i am using ansible to update configuration file of newly added NIC for that i have defined some variables in separate yml file /tmp/ip.yml #first interface interface1: eth1 bootproto1:...

Django Rest Framework using dot in url

Using DRF (Django Rest Framework) one of my models has an IP Address as primary key. class VTE(models.Model): ipaddr = models.CharField(primary_key=True, max_length=16) ... The problem is...

Ping a virtualbox machine from the host machine shows "Destination Host Unreachable"

I don't know why but I can't ping a virtual machine node from the host. I have created a network: vboxnet1: IPv4 Address: 192.168.57.0 IPv4 Network Mask: 255.255.255.0 IPv6 Address:...

Try to validate IP Address with javascript

I'm a beginner to javascript. Now, I'm trying to make a form to post back to server. There are some "input" that contains ip address which should be validate before submitting. Now I have done a...

Docker port forwarding not working

I have setup Docker container for access my machine docker container to another machine in local. Create a container below command: docker run -it -d --name containerName -h www.myhost.net -v...

ping: http://google.com: Name or service not known

I'm using centos7 in virtualbox on windows. And vagrant made it, got ping error with http or https. also curl. someone can help me how to fix it and let it work. [[email protected] ~]# ping...

Any way to change the behavior of synchronous Windows API SendARP?

I'm writing a local network scanner on Windows to find online hosts with IP Helper Functions, which is equivalent to nmap -PR but without WinPcap. I know SendARP will block and send arp request 3...

Curl request incomplete on one server but not another

I'm running curl -L -v http://www.homeaway.com/icalendar/594a74016bdb4733bb9645bce1b0e056.ics on an Ubuntu 14.04 server with curl version 7.35.0. One server returns the ical data, one does not....

uci - how to revert all unstaged changes

uci documentation says: All "uci set", "uci add", "uci rename" and "uci delete" commands are staged into a temporary location and written to flash at once with "uci commit". If I get it right,...

with Rselenium, can't navigate anymore

I asked and answer this question a few days ago and got Rselenium running fine. now I can't navigate anymore, I don't think anything changed so I'm puzzled. shell('docker run -d -p 4445:4444...

Golang gin get client IP in ipv4 only

I'm trying to get the IP address of the client when using gin-gonic but sometimes it gives me the IPv6 address which I don't want. My current code looks like this: web.POST("/path", func(c...

Freeradius: Request without User-Password attribute for rest module

I'm trying to set up a radius server using a rest backend for authentication. I used the following project as example: https://github.com/fgsants/REST-API-FreeRADIUS Everything is setup already,...

Terraform not finding third party plugin in directory specified for plugins

Attempting to get Terraform to work on windows 10 64 bit, using the Virtualbox provider plugin listed here (https://github.com/terra-farm/terraform-provider-virtualbox). I've verified that the...

Freeradius + Active Directory + Google Authenticator

I've been trying to make VPN users authenticate with 2FA (Google authenticator). At the moment I have Cisco ISE, FreeRadius Server, Active Directory. What I want to achieve is when a user connects...

Increment an IP address when the IP address is given in steps in python

How do I increment the IP address in python when we have start_ip in 4 octets format and the step also in 4 octet format. Let's suppose I start with an IP address of 225.1.1.1, and the step as...

how to get Wireless LAN adapter Wi-Fi IP Address in Python?

im currently using this method to show my IP address on python,but i realize this is not IP address i needed hostname = socket.gethostname() IPAddr => socket.gethostbyname(hostname) is there...

How to send data from C# to python using sockets?

I cannot find any example or a tutorial on how to send data from C# to python. in my application, C# is supposed to keep reading data from a hardware and send it to python to be processed. i have...

virtualenv: pre-installed with packages on creating virtual environment

I created a virtual environment using command virtualenv env on my terminal. On using pip freeze > requirements.txt after activating the virtual environment, I was a bunch of packages...

Why do I get the error "there is no reactor running, must be called from the context of Tokio runtime" even though I have #[tokio::main]?

I'm following the mdns Rust documentation and pasted the example code but it throws the following error: thread 'main' panicked at 'there is no reactor running, must be called from the context of...

Consume Confluent Avro Format in Spark standalone cluster?

I have the following simple kafka consumer that works with confluent kafka/schema and avro based topics. It works as expected with local[*]. However, once I try to submit this to a standalone...

How to check for specific ZMQ CPP monitor event

I have a current implementation of ZMQ in my program that works great. I am initializing my monitor with ZMQ_EVENT_CONNECTED then checking for the event with the ZMQ provided bool check_event(10)...

Setup every time Cosmos-DB emulator on Mac on system restart

I followed this video for running new Cosmos DB emulator in Mac OS: https://www.youtube.com/watch?v=NUfK6n8UXi8 Steps followed: Visit the Docker Hub and install Docker Desktop for macOS Retrieve...

Could not find 'minitest' (~> 5.1) among 42 total gem(s) (Gem::MissingSpecError)

I am new to using React Native and is currently trying to make a simple to-do list. Unfortunately, I cannot proceed rn as I am stuck with this error, which I have no idea how to fix. What...