#include<sys/types.h>
#include<sys/socket.h>
#include<linux/netlink.h>
#include<stdlib.h>
#include<string.h>
#include<stdio.h>
#define MAX_PAYLOAD 1024 /* maximum payload size*/
#define NETLINK_TEST 17
struct sockaddr_nl src_addr, dest_addr;
struct nlmsghdr *nlh = NULL;
struct iovec iov;
int sock_fd;
struct msghdr msg;
void main() {
int opt;
int errno;
sock_fd=socket(PF_NETLINK, SOCK_RAW, NETLINK_KOBJECT_UEVENT);
memset(&src_addr, 0, sizeof(src_addr));
src_addr.nl_family = AF_NETLINK;
src_addr.nl_pid = 0; /* self pid */
src_addr.nl_groups = 0x7;
if((errno=bind(sock_fd, (struct sockaddr*)&src_addr, sizeof(src_addr))) < 0)
{
printf("erorr while binding");
return ;
}
opt = src_addr.nl_groups;
setsockopt(sock_fd, 270, NETLINK_PKTINFO, &opt, sizeof(opt));
memset(&dest_addr, 0, sizeof(dest_addr));
nlh = (struct nlmsghdr *)malloc(NLMSG_SPACE(MAX_PAYLOAD));
memset(nlh, 0, NLMSG_SPACE(MAX_PAYLOAD));
iov.iov_base = (void *)nlh;
iov.iov_len=nlh->nlmsg_len;
msg.msg_name = (void *)&dest_addr;
msg.msg_namelen=sizeof(dest_addr);
msg.msg_iov=&iov;
msg.msg_iovlen=1;
printf("Waiting for message from kernel\n");
/* Read message from kernel */
recvmsg(sock_fd, &msg, MSG_WAITALL);
printf(" Received message payload: %s\n",(char *)NLMSG_DATA(nlh));
close(sock_fd);
}