hello,
Please help me. how can i print an incoming packets ip address through following module skeleton?
#define __KERNEL__
#define MODULE
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/skbuff.h>
#include <linux/ip.h>
#include <linux/netfilter.h>
#include <linux/netfilter_ipv4.h>
static struct nf_hook_ops nfho;
unsigned int hook_func(unsigned int hooknum,
struct sk_buff **skb,
const struct net_device *in,
const struct net_device *out,
int (*okfn)(struct sk_buff *))
{
struct sk_buff *sb = *skb;
printk(KERN_DEBUG "calling hook_func NF_IP_LOCAL_IN\n");
........
????????how to use this sb->nh.iph->saddr variable that contains ip address to print it in like 127.0.0.1????????
}
int init_module()
{
nfho.hook = hook_func;
nfho.hooknum = NF_IP_LOCAL_IN;
nfho.pf = PF_INET;
nfho.priority = NF_IP_PRI_FIRST;
nf_register_hook(&nfho);
return 0;
}
void cleanup_module()
{
nf_unregister_hook(&nfho);
}
what statement should be added at place of ...... in above code to work it?
regards,
bunty.
