IP-address from sk_buff

Question

I am writing a kernel module which registers a netfilter hook. I am trying to get the ip address of the caller by using the sk_buff->saddr member. Is there a way

Answer 1

Simple. The IP address in "x.x.x.x" format is called dotted-quad for a reason. Each number represents a byte, for a total of 4 bytes in your address.

So, with the 4 byte address, you would simply print the decimal value of each byte.

Quick and dirty example (replace printf with your output function of choice):

unsigned char *addr = (unsigned char*)sk_buff->addr;
printf("%d.%d.%d.%d", addr[0], addr[1], addr[2], addr[3]);