mirror of
git://git.code.sf.net/p/xtables-addons/xtables-addons
synced 2025-09-06 20:55:13 +02:00
120 lines
3.3 KiB
C
120 lines
3.3 KiB
C
/*
|
|
* xt_LOGMARK - netfilter mark logging
|
|
* useful for debugging
|
|
*
|
|
* Copyright © CC Computer Consultants, 2007 - 2008
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* version 2 or 3 as published by the Free Software Foundation.
|
|
*/
|
|
#include <linux/kernel.h>
|
|
#include <linux/module.h>
|
|
#include <linux/skbuff.h>
|
|
#include <linux/netfilter/nf_conntrack_common.h>
|
|
#include <linux/netfilter/x_tables.h>
|
|
//#include <net/netfilter/nf_conntrack.h>
|
|
#include "compat_xtables.h"
|
|
#include "xt_LOGMARK.h"
|
|
|
|
static unsigned int
|
|
logmark_tg(struct sk_buff *skb, const struct net_device *in,
|
|
const struct net_device *out, unsigned int hooknum,
|
|
const struct xt_target *target, const void *targinfo)
|
|
{
|
|
const struct xt_logmark_tginfo *info = targinfo;
|
|
const struct nf_conn *ct;
|
|
enum ip_conntrack_info ctinfo;
|
|
|
|
printk("<%u>%.*s""nfmark=0x%x secmark=0x%x classify=0x%x",
|
|
info->level, (unsigned int)sizeof(info->prefix), info->prefix,
|
|
skb_nfmark(skb), skb->secmark, skb->priority);
|
|
|
|
ct = nf_ct_get(skb, &ctinfo);
|
|
if (ct == NULL) {
|
|
printk(" ct=NULL ctmark=NULL ctstate=INVALID ctstatus=NONE");
|
|
} else if (ct == &nf_conntrack_untracked) {
|
|
printk(" ct=UNTRACKED ctmark=NULL ctstate=UNTRACKED ctstatus=NONE");
|
|
} else {
|
|
printk(" ct=0x%p ctmark=0x%x ctstate=", ct, ct->mark);
|
|
ctinfo %= IP_CT_IS_REPLY;
|
|
if (ctinfo == IP_CT_NEW)
|
|
printk("NEW");
|
|
else if (ctinfo == IP_CT_ESTABLISHED)
|
|
printk("ESTABLISHED");
|
|
else if (ctinfo == IP_CT_RELATED)
|
|
printk("RELATED");
|
|
if (test_bit(IPS_SRC_NAT_BIT, &ct->status))
|
|
printk(",SNAT");
|
|
if (test_bit(IPS_DST_NAT_BIT, &ct->status))
|
|
printk(",DNAT");
|
|
|
|
printk(" ctstatus=");
|
|
if (ct->status & IPS_EXPECTED)
|
|
printk("EXPECTED");
|
|
if (ct->status & IPS_SEEN_REPLY)
|
|
printk(",SEEN_REPLY");
|
|
if (ct->status & IPS_ASSURED)
|
|
printk(",ASSURED");
|
|
if (ct->status & IPS_CONFIRMED)
|
|
printk(",CONFIRMED");
|
|
}
|
|
|
|
printk("\n");
|
|
return XT_CONTINUE;
|
|
}
|
|
|
|
static bool
|
|
logmark_tg_check(const char *tablename, const void *e,
|
|
const struct xt_target *target, void *targinfo,
|
|
unsigned int hook_mask)
|
|
{
|
|
const struct xt_logmark_tginfo *info = targinfo;
|
|
|
|
if (info->level >= 8) {
|
|
pr_debug("LOGMARK: level %u >= 8\n", info->level);
|
|
return false;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
static struct xt_target logmark_tg_reg[] __read_mostly = {
|
|
{
|
|
.name = "LOGMARK",
|
|
.revision = 0,
|
|
.family = AF_INET,
|
|
.checkentry = logmark_tg_check,
|
|
.target = logmark_tg,
|
|
.targetsize = sizeof(struct xt_logmark_tginfo),
|
|
.me = THIS_MODULE,
|
|
},
|
|
{
|
|
.name = "LOGMARK",
|
|
.revision = 0,
|
|
.family = AF_INET6,
|
|
.checkentry = logmark_tg_check,
|
|
.target = logmark_tg,
|
|
.targetsize = sizeof(struct xt_logmark_tginfo),
|
|
.me = THIS_MODULE,
|
|
},
|
|
};
|
|
|
|
static int __init logmark_tg_init(void)
|
|
{
|
|
return xt_register_targets(logmark_tg_reg, ARRAY_SIZE(logmark_tg_reg));
|
|
}
|
|
|
|
static void __exit logmark_tg_exit(void)
|
|
{
|
|
xt_unregister_targets(logmark_tg_reg, ARRAY_SIZE(logmark_tg_reg));
|
|
}
|
|
|
|
module_init(logmark_tg_init);
|
|
module_exit(logmark_tg_exit);
|
|
MODULE_DESCRIPTION("Xtables: netfilter mark logging to syslog");
|
|
MODULE_AUTHOR("Jan Engelhardt <jengelh@computergmbh.de>");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_ALIAS("ipt_LOGMARK");
|
|
MODULE_ALIAS("ip6t_LOGMARK");
|