Netlink is a socket based inter process communication protocol for Linux systems. It is currently the preferred way, as of 2.6, of communicating with user space from the kernel.
Questions tagged [netlink]
337 questions
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Stuck with netlink, connektor, socket and co
I'm completely new to netlink & co. and I am trying to establisch a connection from user space to the w1-kernel module of a raspberry pi.
Unfortunately the documentation i found is spotty and contradictory.
Here some of the things not clear to…
Andi Wer Sonst
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SK_RMEM_ALLOC Defintion
I am doing research on CVE-2017-16939 and trying to understand the exploit code for an assignment; however, I cannot find clear information on what sk_rmem_alloc represents.
Can someone point me in the direction of documentation that answers these…
Katya
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non-blocking socket vs. select() driven approach
I'm writing user-space application which among other functionality uses netlink sockets to talk to the kernel. I use simple API provided by open source library libmnl.
My application sets certain options over netlink as well as it subscribes to…
Mark
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Why isn't the Kernel receveing my generic netlink messages?
I'm trying to send nested attributes from user space to kernel using generic netlink, the function nl_send_auto() returns 52 (which was supposed to be the numbers of bytes sent to kernel) but the kernel isn't receiving the messages. Is there some…
Matheus
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How to send multipart messages using libnl and generic netlink?
I'm trying to send a relatively big string (6Kb) through libnl and generic netlink, however, I'm receiving the error -5 (NL_ENOMEM) from the function nla_put_string in this process. I've made a lot of research but I didn't find any information about…
Matheus
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mathematica and matlab interaction with NetLink and data exchange between them
I used the following code in mathematica to call matlab
In[1]:= Needs["NETLink`"]
matlab = CreateCOMObject["matlab.application"]
In[5]:= matlab@Execute["a=[1 2;3 4]"]
I want to get matlab workspace variable "a" from mathematica and convert it…
Jalil
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Embedded C in SystemTap - dereferencing pointer to incomplete type
I am following this tutorial: https://blog.lexfo.fr/cve-2017-11176-linux-kernel-exploitation-part1.html
As I try to see what the netlink_sock contains in state, I use this embedded C code:
%{
#include
#include…
Shahar Zelig
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recvmsg in blocking mode still works after fd is invalid
I have a simple program with two threads. One thread listens to some user input and another listens for interface changes using a NETLINK socket. The socket is setup like so:
netlink_fd = socket(AF_NETLINK, SOCK_RAW, NETLINK_ROUTE);
struct…
incubus
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How to send and receive a struct through netlink?
I'm trying to send a struct from user-space to my module in kernel space using netlink, my struct in the user-space is:
struct test{
unsigned int length;
char name[MAX_NAME_LENGTH];
};
and in the kernel space is:
struct test{
__u32 length;
…
Matheus
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Use netlink to get inode from socket on older kernel
I wrote a piece of code to get a list of sockets and their inodes using sock_diag netlink. Here is the send code:
struct {
nlmsghdr nlh;
inet_diag_req_v2 id_req;
} req = {
.nlh = {
.nlmsg_len = sizeof(req),
.nlmsg_type =…
incubus
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The maximum buffer size that we can pass using netlink and PAGE_SIZE influence on it
I am working on an application (ARM platform) that uses netlink messages to pass a buffer of size 8k to kernel space driver to fetch some data from the driver. I have allocated the required memory for the nl message using function…
Vikas Vijayan
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Docker and kubernetes capabilities
i have a question and a problem about capabilities.
Why my program work when i run docker run --cap-add=NET_ADMIN... ? ( i don't have RTNETLINK problems and TC Network problems with ETH0)
And it's doesn't work if i run my program with file .yml…
Julie
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How to use libnl and netlink socket for connect devices to AP programatically?
I'm creating a C library that manages a lot of peripherical of my embedded device. The S.O. used, is a Linux distro compiled with yocto. I'm trying to make some functions to connect my device to wifi (well-know) router, with netlink (using the libnl…
kwroot
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How to connect my device to wifi with libnl?
I'm creating a C library that manage a lot of pheripherical of my embedded device. The S.O. used, is a linux dristro compiled with yocto. I'm trying to make some functions to connect my device to a wifi (well-know) router, with netlink (using the…
Sguit
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IPSec on Linux with strongSwan: received netlink error: No such file or directory (2)
I have set up an IPSec system on two hosts with the following basic information:
- Linux kernel: 4.4.135
- IKE: strongSwan 5.6.1
LAN1 --->| WAN1: 192.168.100.121 | <---->| WAN2: 192.168.100.122 | <---- LAN2
I am testing a new block algorithm named…
Samwell Ho
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