Re: Gettin own IP address thorugh ioctl in kernel space.

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Hi,
On 7/19/06, Chinmaya Mishra <[email protected]> wrote:
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 keernel space.
Check point 29 from http://kasperd.net/~kasperd/comp.os.linux.development.faq.
Modify that source code according to your needs.
Regards,
Parag.
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