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/* This target marks packets to be enqueued to an imq device */
#include <linux/module.h>
#include <linux/skbuff.h>
#include <linux/netfilter_ipv4/ip_tables.h>
#include <linux/netfilter_ipv4/ipt_IMQ.h>
#include <linux/imq.h>
static unsigned int imq_target(struct sk_buff **pskb,
unsigned int hooknum,
const struct net_device *in,
const struct net_device *out,
const void *targinfo,
void *userinfo)
{
struct ipt_imq_info *mr = (struct ipt_imq_info*)targinfo;
(*pskb)->imq_flags = mr->todev | IMQ_F_ENQUEUE;
(*pskb)->nfcache |= NFC_ALTERED;
return IPT_CONTINUE;
}
static int imq_checkentry(const char *tablename,
const struct ipt_entry *e,
void *targinfo,
unsigned int targinfosize,
unsigned int hook_mask)
{
struct ipt_imq_info *mr;
if (targinfosize != IPT_ALIGN(sizeof(struct ipt_imq_info))) {
printk(KERN_WARNING "IMQ: invalid targinfosize\n");
return 0;
}
mr = (struct ipt_imq_info*)targinfo;
if (strcmp(tablename, "mangle") != 0) {
printk(KERN_WARNING
"IMQ: IMQ can only be called from \"mangle\" table, not \"%s\"\n",
tablename);
return 0;
}
if (mr->todev > IMQ_MAX_DEVS) {
printk(KERN_WARNING
"IMQ: invalid device specified, highest is %u\n",
IMQ_MAX_DEVS);
return 0;
}
return 1;
}
static struct ipt_target ipt_imq_reg = {
{ NULL, NULL},
"IMQ",
imq_target,
imq_checkentry,
NULL,
THIS_MODULE
};
static int __init init(void)
{
if (ipt_register_target(&ipt_imq_reg))
return -EINVAL;
return 0;
}
static void __exit fini(void)
{
ipt_unregister_target(&ipt_imq_reg);
}
module_init(init);
module_exit(fini);
MODULE_LICENSE("GPL");
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