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

["Parag N(पराग़)" <panemade@gmail.com>]

Hi,
On 7/19/06, Chinmaya Mishra <chinmaya4@gmail.com> 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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