What is netlink and what its types?

What is netlink and what its types?

Netlink is designed and used for transferring miscellaneous networking information between the kernel space and userspace processes….Netlink.

Stable release 5.17.1 / 28 March 2022
Operating system Linux
Platform Linux kernel
Type Application programming interface
License GNU General Public License

What is netlink used for?

Netlink is used to transfer information between the kernel and user-space processes. It consists of a standard sockets-based interface for user space processes and an internal kernel API for kernel modules.

What is netlink protocol?

The netlink protocol is a socket based IPC mechanism used for communication between userspace processes and the kernel or between userspace processes themselves. The netlink protocol is based on BSD sockets and uses the AF_NETLINK address family.

What is Rtm_newlink?

RTM_NEWLINK , RTM_DELLINK , RTM_GETLINK. Create, remove, or get information about a specific network interface. These messages contain an ifinfomsg structure followed by a series of rtattr structures. struct.

Is Linux a networking device?

Linux has long been the basis of commercial networking devices, but now it’s a mainstay of enterprise infrastructure. Linux is a tried-and-true, open-source operating system released in 1991 for computers, but its use has expanded to underpin systems for cars, phones, web servers and, more recently, networking gear.

What is Netdev in Linux?

What is netdev? ¶ It is a mailing list for all network-related Linux stuff. This includes anything found under net/ (i.e. core code like IPv6) and drivers/net (i.e. hardware specific drivers) in the Linux source tree.

What is netfilter in Linux?

Netfilter is a framework provided by the Linux kernel that allows various networking-related operations to be implemented in the form of customized handlers.

How does Netlink socket work?

Netlink is asynchronous because, as with any other socket API, it provides a socket queue to smooth the burst of messages. The system call for sending a netlink message queues the message to the receiver’s netlink queue and then invokes the receiver’s reception handler.

What is generic netlink?

What is generic netlink? Generic netlink was designed to allow kernel modules to easily communicate with userspace applications using netlink. Instead of creating a new top level netlink family for each module, generic netlink provides a simplified interface to enable modules to plug into the generic netlink bus.

What is generic Netlink?

What is RTNL in Linux?

If you look at the source it says it’s for “Routing Netlink”.

How does netlink socket work?