How to get the IP address in kernel module

From: Chinmaya Mishra
Date: Wed Jul 19 2006 - 05:47:59 EST


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

How to port this in kernel space.

Thank you.
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