My goal is to monitor sockets and relate them to the applications that created them. I am aware of netstat, ss, lsof and so on and that they can list all sockets with their application. And I also ...

I was trying to write a simple program communicating between kernel and user space using Netlink. Basically here's what I wanted to achieve: User space program starts binding to a user defined mu...

How do you get VLAN information like addition and deletion of VLAN sub interface from kernel to userspace using NETLINK socket in C? I did little study in NETLINK man as suggested in comments. I a...

I've been gleaning information about the NETLINK socket which allows us to listen on what is happening in socket land. It seems to very partially work, but I'm wondering whether I missed something....

When I run this cmd: tc qdisc add dev eth0 root red limit 51200000 min 128000 max 512000 avpkt 1024 burst 200 ecn probability 0.5 i get RTNETLINK answers: No such file or directory I have co...

My application does not break during Runtime. However, the following error messages always show up E/NetlinkEvent: NetlinkEvent::FindParam(): Parameter 'UID' not found this log print continuousl...

I am getting compiler error while compiling my old kernel module which is using netlink functions. int init_module() { /* Initialize the Netlink kernel interface */ nl_sk = netlink_kernel_creat...

Can anyone help me make sense of the below error and others like it? I've Googled around, but nothing makes sense for my context. I download my Docker Image, but the container refuses to start. The...

I write a program which needs to get notified if the network interfaces have changed, in particular new one appeared or existed one gone. My research brought to the netlink and its RTMGRP_LINK sign...

I've been developing an application that monitors the USB device tree using libusb_hotplug_register_callback(). When a device that matches some criteria is attached, it will fork() and exec() an ap...

I wrote a small go script and traced it using strace though this script, I am trying to fetch audit messages from kernel using netlink protocol, just like like auditd. Following is the strace out...

i was going through ioctl sample programs to check how it communicates with kernel space. in program WRITE_IOCTL is used as command #define WRITE_IOCTL _IOW(MY_MACIG, 1, int) ioctl(fd, WRITE_IOCT...

Trying to figure out how one can use iproute2 to manage static label-switched MPLS routes in Linux kernel 4.1. I am aware iproute2 support for MPLS might be incomplete right now [2]. Can anyone...

I was trying to reproduce the example from a previous SO post on a kernel above 4 (4.1): #include <linux/module.h> #include <linux/kernel.h> #include <linux/netlink.h> #include &...

I am trying to run following code, which was copied from here. I have made few changes to run it with older kernel versions. When I insert kernel module, nlmsg_multicast() fails and logs as nlmsg...

I have several kernel modules which need to interact with userspace. Hence, each module has a Netlink socket. My problem is that these sockets interfere with each other. This is because all of the...

The task I am trying to achieve is actually quite simple (multicast the string "TEST" to a userland daemon), but the kernel module doesn't compile. It stops with the error: passing argument 4 of ‘...

I am working with Netlink sockets to send customized notifications regarding the state of an ethernet interface from a kernel module to a user space application over the NETLINK_ROUTE channel. I ha...

I am trying to write a linux kernel module that communicates with user process using netlink. I am using netlink because the user program I want to communicate to communicates only using sockets an...

I am planning to use netlink for communication between two userland processes. Part of the reason being so picky about netlink is - Most of the processing for one of the process would eventually go...

I tried this program. This program send "hello" to kernel and kernel replies "hello" to user space again for one time. My requirement: user has to send "hello" and have to receive message for ever...

I understand that Netlink is the modern and correct way to communicate kernel and userspace in Linux. I have a kernel module that needs to be configurable, so I'm using Netlink to have it talk to ...

Please can someone give an simple example on how to use libnl to use nl80211. I tried to go through iw source code but it is very confusing. Can any one give a simple program on how to trigger nl80...

Good day. I would like to create two (almost same) modules - each module uses netlink socket and replies to the incoming message from userspace program. During the initialization of the first modu...

I'm trying to send a struct from a LKM to userland, based on this answer: Netlink Sockets in C using the 3.X linux kernel The code from the answer itself is perfectly compilable, but when I try to...