The interested reader can refer the netlink socket structures in the below two links Netlink Socket structures – part 1 Netlink Socket structures – part 2 The Netlink Message construction uses a number of macros to create the complete netlink message. The below Netlink macros provide information on how the netlink message is constructed. int […]

System programming in my own words can possibly be described as programming mechanisms to interact with various aspects of a system. It could be a shell script, a daemon, user space to kernel space interaction mechanisms, interaction between processes, file system management, memory management etc. System programming in Linux is in itself a very vast […]

The Part 1 of ths Netlink socket structures discussion can be found in the below link. The Netlink Socket Structures – Part 1 The netlink message is sent using a netlink message. The format of the netlink message is shown below Fig Courtesy: https://people.redhat.com/nhorman/papers/netlink.pdf The nlmsghdr is the netlink message header and is given below […]

The Socket Address structure for Netlink sockets is provided below (linux/netlink.h). struct sockaddr_nl {         sa_family_t nl_family;         unsigned short nl_pad;         __u32 nl_pid;         __u32 nl_groups; }; The socket structure uses the AF_NETLINK socket family. The nl_pad bytes are zero filled pad-bytes. […]

The Netlink socket mechanism might be better placed in the socket programming section. However, the Netlink mechanism being a socket mechanism which is used to converse with the kernel, placing it here. The Netlink Socket is a mechanism to retrieve and send data between user space and kernel space. The Netlink socket has its own […]