How to get the IP address in kernel module

[Chinmaya Mishra <chinmaya4@gmail.com>]

Hi,

Can you provide an example how to invoke ioctl on
device in kernel module.

For example. I want to find out the IP address of
my eth0 and I want to make SIOCSIFADDR on it from kernel module.


At user space i am doing it like this.....

unsigned long *ip;
char *iface;
int sockfd;
struct ifreq ifr;
strcpy(ifr.ifr_name, iface);    // interface name 'eth0'
sockfd = socket(AF_INET,SOCK_DGRAM,0);
ioctl(sockfd, SIOCGIFADDR, (char*)&ifr);
memcpy(ip, &(ifr.ifr_addr.sa_data[2]),4); //Copy the ip addr
close(sockfd);

How to port this in kernel space.

Thank you.
Chinmaya