[net-next-2.6.git] / net / netfilter / nf_conntrack_standalone.c

/* This file contains all the functions required for the standalone
   nf_conntrack module.

   These are not required by the compatibility layer.
*/

/* (C) 1999-2001 Paul `Rusty' Russell
 * (C) 2002-2004 Netfilter Core Team <coreteam@netfilter.org>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 * 16 Dec 2003: Yasuyuki Kozakai @USAGI <yasuyuki.kozakai@toshiba.co.jp>
 *	- generalize L3 protocol dependent part.
 *
 * Derived from net/ipv4/netfilter/ip_conntrack_standalone.c
 */

#include <linux/types.h>
#include <linux/netfilter.h>
#include <linux/module.h>
#include <linux/skbuff.h>
#include <linux/proc_fs.h>
#include <linux/seq_file.h>
#include <linux/percpu.h>
#include <linux/netdevice.h>
#ifdef CONFIG_SYSCTL
#include <linux/sysctl.h>
#endif

#include <net/netfilter/nf_conntrack.h>
#include <net/netfilter/nf_conntrack_core.h>
#include <net/netfilter/nf_conntrack_l3proto.h>
#include <net/netfilter/nf_conntrack_l4proto.h>
#include <net/netfilter/nf_conntrack_expect.h>
#include <net/netfilter/nf_conntrack_helper.h>

#if 0
#define DEBUGP printk
#else
#define DEBUGP(format, args...)
#endif

MODULE_LICENSE("GPL");

#ifdef CONFIG_PROC_FS
int
print_tuple(struct seq_file *s, const struct nf_conntrack_tuple *tuple,
	    struct nf_conntrack_l3proto *l3proto,
	    struct nf_conntrack_l4proto *l4proto)
{
	return l3proto->print_tuple(s, tuple) || l4proto->print_tuple(s, tuple);
}

#ifdef CONFIG_NF_CT_ACCT
static unsigned int
seq_print_counters(struct seq_file *s,
		   const struct ip_conntrack_counter *counter)
{
	return seq_printf(s, "packets=%llu bytes=%llu ",
			  (unsigned long long)counter->packets,
			  (unsigned long long)counter->bytes);
}
#else
#define seq_print_counters(x, y)	0
#endif

struct ct_iter_state {
	unsigned int bucket;
};

static struct list_head *ct_get_first(struct seq_file *seq)
{
	struct ct_iter_state *st = seq->private;

	for (st->bucket = 0;
	     st->bucket < nf_conntrack_htable_size;
	     st->bucket++) {
		if (!list_empty(&nf_conntrack_hash[st->bucket]))
			return nf_conntrack_hash[st->bucket].next;
	}
	return NULL;
}

static struct list_head *ct_get_next(struct seq_file *seq, struct list_head *head)
{
	struct ct_iter_state *st = seq->private;

	head = head->next;
	while (head == &nf_conntrack_hash[st->bucket]) {
		if (++st->bucket >= nf_conntrack_htable_size)
			return NULL;
		head = nf_conntrack_hash[st->bucket].next;
	}
	return head;
}

static struct list_head *ct_get_idx(struct seq_file *seq, loff_t pos)
{
	struct list_head *head = ct_get_first(seq);

	if (head)
		while (pos && (head = ct_get_next(seq, head)))
			pos--;
	return pos ? NULL : head;
}

static void *ct_seq_start(struct seq_file *seq, loff_t *pos)
{
	read_lock_bh(&nf_conntrack_lock);
	return ct_get_idx(seq, *pos);
}

static void *ct_seq_next(struct seq_file *s, void *v, loff_t *pos)
{
	(*pos)++;
	return ct_get_next(s, v);
}

static void ct_seq_stop(struct seq_file *s, void *v)
{
	read_unlock_bh(&nf_conntrack_lock);
}

/* return 0 on success, 1 in case of error */
static int ct_seq_show(struct seq_file *s, void *v)
{
	const struct nf_conntrack_tuple_hash *hash = v;
	const struct nf_conn *conntrack = nf_ct_tuplehash_to_ctrack(hash);
	struct nf_conntrack_l3proto *l3proto;
	struct nf_conntrack_l4proto *l4proto;

	NF_CT_ASSERT(conntrack);

	/* we only want to print DIR_ORIGINAL */
	if (NF_CT_DIRECTION(hash))
		return 0;

	l3proto = __nf_ct_l3proto_find(conntrack->tuplehash[IP_CT_DIR_ORIGINAL]
				       .tuple.src.l3num);

	NF_CT_ASSERT(l3proto);
	l4proto = __nf_ct_l4proto_find(conntrack->tuplehash[IP_CT_DIR_ORIGINAL]
				   .tuple.src.l3num,
				   conntrack->tuplehash[IP_CT_DIR_ORIGINAL]
				   .tuple.dst.protonum);
	NF_CT_ASSERT(l4proto);

	if (seq_printf(s, "%-8s %u %-8s %u %ld ",
		       l3proto->name,
		       conntrack->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.l3num,
		       l4proto->name,
		       conntrack->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.protonum,
		       timer_pending(&conntrack->timeout)
		       ? (long)(conntrack->timeout.expires - jiffies)/HZ : 0) != 0)
		return -ENOSPC;

	if (l3proto->print_conntrack(s, conntrack))
		return -ENOSPC;

	if (l4proto->print_conntrack(s, conntrack))
		return -ENOSPC;

	if (print_tuple(s, &conntrack->tuplehash[IP_CT_DIR_ORIGINAL].tuple,
			l3proto, l4proto))
		return -ENOSPC;

	if (seq_print_counters(s, &conntrack->counters[IP_CT_DIR_ORIGINAL]))
		return -ENOSPC;

	if (!(test_bit(IPS_SEEN_REPLY_BIT, &conntrack->status)))
		if (seq_printf(s, "[UNREPLIED] "))
			return -ENOSPC;

	if (print_tuple(s, &conntrack->tuplehash[IP_CT_DIR_REPLY].tuple,
			l3proto, l4proto))
		return -ENOSPC;

	if (seq_print_counters(s, &conntrack->counters[IP_CT_DIR_REPLY]))
		return -ENOSPC;

	if (test_bit(IPS_ASSURED_BIT, &conntrack->status))
		if (seq_printf(s, "[ASSURED] "))
			return -ENOSPC;

#if defined(CONFIG_NF_CONNTRACK_MARK)
	if (seq_printf(s, "mark=%u ", conntrack->mark))
		return -ENOSPC;
#endif

#ifdef CONFIG_NF_CONNTRACK_SECMARK
	if (seq_printf(s, "secmark=%u ", conntrack->secmark))
		return -ENOSPC;
#endif

	if (seq_printf(s, "use=%u\n", atomic_read(&conntrack->ct_general.use)))
		return -ENOSPC;
	
	return 0;
}

static struct seq_operations ct_seq_ops = {
	.start = ct_seq_start,
	.next  = ct_seq_next,
	.stop  = ct_seq_stop,
	.show  = ct_seq_show
};

static int ct_open(struct inode *inode, struct file *file)
{
	struct seq_file *seq;
	struct ct_iter_state *st;
	int ret;

	st = kmalloc(sizeof(struct ct_iter_state), GFP_KERNEL);
	if (st == NULL)
		return -ENOMEM;
	ret = seq_open(file, &ct_seq_ops);
	if (ret)
		goto out_free;
	seq          = file->private_data;
	seq->private = st;
	memset(st, 0, sizeof(struct ct_iter_state));
	return ret;
out_free:
	kfree(st);
	return ret;
}

static struct file_operations ct_file_ops = {
	.owner   = THIS_MODULE,
	.open    = ct_open,
	.read    = seq_read,
	.llseek  = seq_lseek,
	.release = seq_release_private,
};

static void *ct_cpu_seq_start(struct seq_file *seq, loff_t *pos)
{
	int cpu;

	if (*pos == 0)
		return SEQ_START_TOKEN;

	for (cpu = *pos-1; cpu < NR_CPUS; ++cpu) {
		if (!cpu_possible(cpu))
			continue;
		*pos = cpu + 1;
		return &per_cpu(nf_conntrack_stat, cpu);
	}

	return NULL;
}

static void *ct_cpu_seq_next(struct seq_file *seq, void *v, loff_t *pos)
{
	int cpu;

	for (cpu = *pos; cpu < NR_CPUS; ++cpu) {
		if (!cpu_possible(cpu))
			continue;
		*pos = cpu + 1;
		return &per_cpu(nf_conntrack_stat, cpu);
	}

	return NULL;
}

static void ct_cpu_seq_stop(struct seq_file *seq, void *v)
{
}

static int ct_cpu_seq_show(struct seq_file *seq, void *v)
{
	unsigned int nr_conntracks = atomic_read(&nf_conntrack_count);
	struct ip_conntrack_stat *st = v;

	if (v == SEQ_START_TOKEN) {
		seq_printf(seq, "entries  searched found new invalid ignore delete delete_list insert insert_failed drop early_drop icmp_error  expect_new expect_create expect_delete\n");
		return 0;
	}

	seq_printf(seq, "%08x  %08x %08x %08x %08x %08x %08x %08x "
			"%08x %08x %08x %08x %08x  %08x %08x %08x \n",
		   nr_conntracks,
		   st->searched,
		   st->found,
		   st->new,
		   st->invalid,
		   st->ignore,
		   st->delete,
		   st->delete_list,
		   st->insert,
		   st->insert_failed,
		   st->drop,
		   st->early_drop,
		   st->error,

		   st->expect_new,
		   st->expect_create,
		   st->expect_delete
		);
	return 0;
}

static struct seq_operations ct_cpu_seq_ops = {
	.start	= ct_cpu_seq_start,
	.next	= ct_cpu_seq_next,
	.stop	= ct_cpu_seq_stop,
	.show	= ct_cpu_seq_show,
};

static int ct_cpu_seq_open(struct inode *inode, struct file *file)
{
	return seq_open(file, &ct_cpu_seq_ops);
}

static struct file_operations ct_cpu_seq_fops = {
	.owner	 = THIS_MODULE,
	.open	 = ct_cpu_seq_open,
	.read	 = seq_read,
	.llseek	 = seq_lseek,
	.release = seq_release_private,
};
#endif /* CONFIG_PROC_FS */

/* Sysctl support */

int nf_conntrack_checksum __read_mostly = 1;

#ifdef CONFIG_SYSCTL
/* Log invalid packets of a given protocol */
static int log_invalid_proto_min = 0;
static int log_invalid_proto_max = 255;

static struct ctl_table_header *nf_ct_sysctl_header;

static ctl_table nf_ct_sysctl_table[] = {
	{
		.ctl_name	= NET_NF_CONNTRACK_MAX,
		.procname	= "nf_conntrack_max",
		.data		= &nf_conntrack_max,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec,
	},
	{
		.ctl_name	= NET_NF_CONNTRACK_COUNT,
		.procname	= "nf_conntrack_count",
		.data		= &nf_conntrack_count,
		.maxlen		= sizeof(int),
		.mode		= 0444,
		.proc_handler	= &proc_dointvec,
	},
	{
		.ctl_name       = NET_NF_CONNTRACK_BUCKETS,
		.procname       = "nf_conntrack_buckets",
		.data           = &nf_conntrack_htable_size,
		.maxlen         = sizeof(unsigned int),
		.mode           = 0444,
		.proc_handler   = &proc_dointvec,
	},
	{
		.ctl_name	= NET_NF_CONNTRACK_CHECKSUM,
		.procname	= "nf_conntrack_checksum",
		.data		= &nf_conntrack_checksum,
		.maxlen		= sizeof(unsigned int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec,
	},
	{
		.ctl_name	= NET_NF_CONNTRACK_LOG_INVALID,
		.procname	= "nf_conntrack_log_invalid",
		.data		= &nf_ct_log_invalid,
		.maxlen		= sizeof(unsigned int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec_minmax,
		.strategy	= &sysctl_intvec,
		.extra1		= &log_invalid_proto_min,
		.extra2		= &log_invalid_proto_max,
	},

	{ .ctl_name = 0 }
};

#define NET_NF_CONNTRACK_MAX 2089

static ctl_table nf_ct_netfilter_table[] = {
	{
		.ctl_name	= NET_NETFILTER,
		.procname	= "netfilter",
		.mode		= 0555,
		.child		= nf_ct_sysctl_table,
	},
	{
		.ctl_name	= NET_NF_CONNTRACK_MAX,
		.procname	= "nf_conntrack_max",
		.data		= &nf_conntrack_max,
		.maxlen		= sizeof(int),
		.mode		= 0644,
		.proc_handler	= &proc_dointvec,
	},
	{ .ctl_name = 0 }
};

static ctl_table nf_ct_net_table[] = {
	{
		.ctl_name	= CTL_NET,
		.procname	= "net",
		.mode		= 0555,
		.child		= nf_ct_netfilter_table,
	},
	{ .ctl_name = 0 }
};
EXPORT_SYMBOL(nf_ct_log_invalid);
#endif /* CONFIG_SYSCTL */

static int __init nf_conntrack_standalone_init(void)
{
#ifdef CONFIG_PROC_FS
	struct proc_dir_entry *proc, *proc_exp, *proc_stat;
#endif
	int ret = 0;

	ret = nf_conntrack_init();
	if (ret < 0)
		return ret;

#ifdef CONFIG_PROC_FS
	proc = proc_net_fops_create("nf_conntrack", 0440, &ct_file_ops);
	if (!proc) goto cleanup_init;

	proc_exp = proc_net_fops_create("nf_conntrack_expect", 0440,
					&exp_file_ops);
	if (!proc_exp) goto cleanup_proc;

	proc_stat = create_proc_entry("nf_conntrack", S_IRUGO, proc_net_stat);
	if (!proc_stat)
		goto cleanup_proc_exp;

	proc_stat->proc_fops = &ct_cpu_seq_fops;
	proc_stat->owner = THIS_MODULE;
#endif
#ifdef CONFIG_SYSCTL
	nf_ct_sysctl_header = register_sysctl_table(nf_ct_net_table, 0);
	if (nf_ct_sysctl_header == NULL) {
		printk("nf_conntrack: can't register to sysctl.\n");
		ret = -ENOMEM;
		goto cleanup_proc_stat;
	}
#endif
	return ret;

#ifdef CONFIG_SYSCTL
 cleanup_proc_stat:
#endif
#ifdef CONFIG_PROC_FS
	remove_proc_entry("nf_conntrack", proc_net_stat);
 cleanup_proc_exp:
	proc_net_remove("nf_conntrack_expect");
 cleanup_proc:
	proc_net_remove("nf_conntrack");
 cleanup_init:
#endif /* CNFIG_PROC_FS */
	nf_conntrack_cleanup();
	return ret;
}

static void __exit nf_conntrack_standalone_fini(void)
{
#ifdef CONFIG_SYSCTL
 	unregister_sysctl_table(nf_ct_sysctl_header);
#endif
#ifdef CONFIG_PROC_FS
	remove_proc_entry("nf_conntrack", proc_net_stat);
	proc_net_remove("nf_conntrack_expect");
	proc_net_remove("nf_conntrack");
#endif /* CNFIG_PROC_FS */
	nf_conntrack_cleanup();
}

module_init(nf_conntrack_standalone_init);
module_exit(nf_conntrack_standalone_fini);

/* Some modules need us, but don't depend directly on any symbol.
   They should call this. */
void need_conntrack(void)
{
}

#ifdef CONFIG_NF_CONNTRACK_EVENTS
EXPORT_SYMBOL_GPL(nf_conntrack_chain);
EXPORT_SYMBOL_GPL(nf_conntrack_expect_chain);
EXPORT_SYMBOL_GPL(nf_conntrack_register_notifier);
EXPORT_SYMBOL_GPL(nf_conntrack_unregister_notifier);
EXPORT_SYMBOL_GPL(__nf_ct_event_cache_init);
EXPORT_PER_CPU_SYMBOL_GPL(nf_conntrack_ecache);
EXPORT_SYMBOL_GPL(nf_ct_deliver_cached_events);
#endif
EXPORT_SYMBOL(nf_ct_l3proto_try_module_get);
EXPORT_SYMBOL(nf_ct_l3proto_module_put);
EXPORT_SYMBOL(nf_conntrack_l3proto_register);
EXPORT_SYMBOL(nf_conntrack_l3proto_unregister);
EXPORT_SYMBOL(nf_conntrack_l4proto_register);
EXPORT_SYMBOL(nf_conntrack_l4proto_unregister);
EXPORT_SYMBOL(nf_ct_invert_tuplepr);
EXPORT_SYMBOL(nf_conntrack_destroyed);
EXPORT_SYMBOL(need_conntrack);
EXPORT_SYMBOL(nf_conntrack_helper_register);
EXPORT_SYMBOL(nf_conntrack_helper_unregister);
EXPORT_SYMBOL(nf_ct_iterate_cleanup);
EXPORT_SYMBOL(__nf_ct_refresh_acct);
EXPORT_SYMBOL(nf_ct_protos);
EXPORT_SYMBOL(__nf_ct_l4proto_find);
EXPORT_SYMBOL(nf_ct_l4proto_find_get);
EXPORT_SYMBOL(nf_ct_l4proto_put);
EXPORT_SYMBOL(nf_ct_l3proto_find_get);
EXPORT_SYMBOL(nf_ct_l3proto_put);
EXPORT_SYMBOL(nf_ct_l3protos);
EXPORT_SYMBOL_GPL(nf_conntrack_checksum);
EXPORT_SYMBOL(nf_conntrack_expect_alloc);
EXPORT_SYMBOL(nf_conntrack_expect_put);
EXPORT_SYMBOL(nf_conntrack_expect_related);
EXPORT_SYMBOL(nf_conntrack_unexpect_related);
EXPORT_SYMBOL(nf_conntrack_tuple_taken);
EXPORT_SYMBOL(nf_conntrack_htable_size);
EXPORT_SYMBOL(nf_conntrack_lock);
EXPORT_SYMBOL(nf_conntrack_hash);
EXPORT_SYMBOL(nf_conntrack_untracked);
EXPORT_SYMBOL_GPL(nf_conntrack_find_get);
#ifdef CONFIG_IP_NF_NAT_NEEDED
EXPORT_SYMBOL(nf_conntrack_tcp_update);
#endif
EXPORT_SYMBOL(__nf_conntrack_confirm);
EXPORT_SYMBOL(nf_ct_get_tuple);
EXPORT_SYMBOL(nf_ct_invert_tuple);
EXPORT_SYMBOL(nf_conntrack_in);
EXPORT_SYMBOL(__nf_conntrack_attach);
EXPORT_SYMBOL(nf_conntrack_alloc);
EXPORT_SYMBOL(nf_conntrack_free);
EXPORT_SYMBOL(nf_conntrack_flush);
EXPORT_SYMBOL(nf_ct_remove_expectations);
EXPORT_SYMBOL(nf_ct_helper_find_get);
EXPORT_SYMBOL(nf_ct_helper_put);
EXPORT_SYMBOL(__nf_conntrack_helper_find_byname);
EXPORT_SYMBOL(__nf_conntrack_find);
EXPORT_SYMBOL(nf_ct_unlink_expect);
EXPORT_SYMBOL(nf_conntrack_hash_insert);
EXPORT_SYMBOL(__nf_conntrack_expect_find);
EXPORT_SYMBOL(nf_conntrack_expect_find);
EXPORT_SYMBOL(nf_conntrack_expect_list);
#if defined(CONFIG_NF_CT_NETLINK) || \
    defined(CONFIG_NF_CT_NETLINK_MODULE)
EXPORT_SYMBOL(nf_ct_port_tuple_to_nfattr);
EXPORT_SYMBOL(nf_ct_port_nfattr_to_tuple);
#endif
Commit	Line	Data
9fb9cbb1 YK	1	/* This file contains all the functions required for the standalone
	2	nf_conntrack module.
	3
	4	These are not required by the compatibility layer.
	5	*/
	6
	7	/* (C) 1999-2001 Paul `Rusty' Russell
	8	* (C) 2002-2004 Netfilter Core Team <coreteam@netfilter.org>
	9	*
	10	* This program is free software; you can redistribute it and/or modify
	11	* it under the terms of the GNU General Public License version 2 as
	12	* published by the Free Software Foundation.
	13	*
	14	* 16 Dec 2003: Yasuyuki Kozakai @USAGI <yasuyuki.kozakai@toshiba.co.jp>
	15	* - generalize L3 protocol dependent part.
	16	*
	17	* Derived from net/ipv4/netfilter/ip_conntrack_standalone.c
	18	*/
	19
9fb9cbb1 YK	20	#include <linux/types.h>
	21	#include <linux/netfilter.h>
	22	#include <linux/module.h>
	23	#include <linux/skbuff.h>
	24	#include <linux/proc_fs.h>
	25	#include <linux/seq_file.h>
	26	#include <linux/percpu.h>
	27	#include <linux/netdevice.h>
	28	#ifdef CONFIG_SYSCTL
	29	#include <linux/sysctl.h>
	30	#endif
	31
9fb9cbb1	32	#include <net/netfilter/nf_conntrack.h>
f6180121	33	#include <net/netfilter/nf_conntrack_core.h>
9fb9cbb1	34	#include <net/netfilter/nf_conntrack_l3proto.h>
605dcad6	35	#include <net/netfilter/nf_conntrack_l4proto.h>
77ab9cff	36	#include <net/netfilter/nf_conntrack_expect.h>
9fb9cbb1	37	#include <net/netfilter/nf_conntrack_helper.h>
9fb9cbb1 YK	38
	39	#if 0
	40	#define DEBUGP printk
	41	#else
	42	#define DEBUGP(format, args...)
	43	#endif
	44
	45	MODULE_LICENSE("GPL");
	46
9fb9cbb1	47	#ifdef CONFIG_PROC_FS
77ab9cff	48	int
9fb9cbb1 YK	49	print_tuple(struct seq_file s, const struct nf_conntrack_tuple tuple,
9fb9cbb1 YK	50	struct nf_conntrack_l3proto *l3proto,
605dcad6	51	struct nf_conntrack_l4proto *l4proto)
9fb9cbb1	52	{
605dcad6	53	return l3proto->print_tuple(s, tuple) \|\| l4proto->print_tuple(s, tuple);
9fb9cbb1 YK	54	}
	55
	56	#ifdef CONFIG_NF_CT_ACCT
	57	static unsigned int
	58	seq_print_counters(struct seq_file *s,
	59	const struct ip_conntrack_counter *counter)
	60	{
	61	return seq_printf(s, "packets=%llu bytes=%llu ",
	62	(unsigned long long)counter->packets,
	63	(unsigned long long)counter->bytes);
	64	}
	65	#else
	66	#define seq_print_counters(x, y) 0
	67	#endif
	68
	69	struct ct_iter_state {
	70	unsigned int bucket;
	71	};
	72
	73	static struct list_head ct_get_first(struct seq_file seq)
	74	{
	75	struct ct_iter_state *st = seq->private;
	76
	77	for (st->bucket = 0;
	78	st->bucket < nf_conntrack_htable_size;
	79	st->bucket++) {
	80	if (!list_empty(&nf_conntrack_hash[st->bucket]))
	81	return nf_conntrack_hash[st->bucket].next;
	82	}
	83	return NULL;
	84	}
	85
	86	static struct list_head ct_get_next(struct seq_file seq, struct list_head *head)
	87	{
	88	struct ct_iter_state *st = seq->private;
	89
	90	head = head->next;
	91	while (head == &nf_conntrack_hash[st->bucket]) {
	92	if (++st->bucket >= nf_conntrack_htable_size)
	93	return NULL;
	94	head = nf_conntrack_hash[st->bucket].next;
	95	}
	96	return head;
	97	}
	98
	99	static struct list_head ct_get_idx(struct seq_file seq, loff_t pos)
	100	{
	101	struct list_head *head = ct_get_first(seq);
	102
	103	if (head)
	104	while (pos && (head = ct_get_next(seq, head)))
	105	pos--;
	106	return pos ? NULL : head;
	107	}
	108
	109	static void ct_seq_start(struct seq_file seq, loff_t *pos)
	110	{
	111	read_lock_bh(&nf_conntrack_lock);
	112	return ct_get_idx(seq, *pos);
	113	}
	114
	115	static void ct_seq_next(struct seq_file s, void v, loff_t pos)
	116	{
	117	(*pos)++;
118	return ct_get_next(s, v);
119	}
120
121	static void ct_seq_stop(struct seq_file s, void v)
122	{
123	read_unlock_bh(&nf_conntrack_lock);
124	}
125
126	/* return 0 on success, 1 in case of error */
127	static int ct_seq_show(struct seq_file s, void v)
128	{
129	const struct nf_conntrack_tuple_hash *hash = v;
130	const struct nf_conn *conntrack = nf_ct_tuplehash_to_ctrack(hash);
131	struct nf_conntrack_l3proto *l3proto;
605dcad6	132	struct nf_conntrack_l4proto *l4proto;
9fb9cbb1	133
9fb9cbb1 YK	134	NF_CT_ASSERT(conntrack);
	135
	136	/* we only want to print DIR_ORIGINAL */
	137	if (NF_CT_DIRECTION(hash))
	138	return 0;
	139
c1d10adb PNA	140	l3proto = __nf_ct_l3proto_find(conntrack->tuplehash[IP_CT_DIR_ORIGINAL]
c1d10adb PNA	141	.tuple.src.l3num);
9fb9cbb1 YK	142
9fb9cbb1 YK	143	NF_CT_ASSERT(l3proto);
605dcad6	144	l4proto = __nf_ct_l4proto_find(conntrack->tuplehash[IP_CT_DIR_ORIGINAL]
c1d10adb PNA	145	.tuple.src.l3num,
	146	conntrack->tuplehash[IP_CT_DIR_ORIGINAL]
	147	.tuple.dst.protonum);
605dcad6	148	NF_CT_ASSERT(l4proto);
9fb9cbb1 YK	149
	150	if (seq_printf(s, "%-8s %u %-8s %u %ld ",
	151	l3proto->name,
	152	conntrack->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.l3num,
605dcad6	153	l4proto->name,
9fb9cbb1 YK	154	conntrack->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.protonum,
	155	timer_pending(&conntrack->timeout)
	156	? (long)(conntrack->timeout.expires - jiffies)/HZ : 0) != 0)
	157	return -ENOSPC;
	158
	159	if (l3proto->print_conntrack(s, conntrack))
	160	return -ENOSPC;
	161
605dcad6	162	if (l4proto->print_conntrack(s, conntrack))
9fb9cbb1 YK	163	return -ENOSPC;
	164
	165	if (print_tuple(s, &conntrack->tuplehash[IP_CT_DIR_ORIGINAL].tuple,
605dcad6	166	l3proto, l4proto))
9fb9cbb1 YK	167	return -ENOSPC;
	168
	169	if (seq_print_counters(s, &conntrack->counters[IP_CT_DIR_ORIGINAL]))
	170	return -ENOSPC;
	171
	172	if (!(test_bit(IPS_SEEN_REPLY_BIT, &conntrack->status)))
	173	if (seq_printf(s, "[UNREPLIED] "))
	174	return -ENOSPC;
	175
	176	if (print_tuple(s, &conntrack->tuplehash[IP_CT_DIR_REPLY].tuple,
605dcad6	177	l3proto, l4proto))
9fb9cbb1 YK	178	return -ENOSPC;
	179
	180	if (seq_print_counters(s, &conntrack->counters[IP_CT_DIR_REPLY]))
	181	return -ENOSPC;
	182
	183	if (test_bit(IPS_ASSURED_BIT, &conntrack->status))
	184	if (seq_printf(s, "[ASSURED] "))
	185	return -ENOSPC;
	186
	187	#if defined(CONFIG_NF_CONNTRACK_MARK)
	188	if (seq_printf(s, "mark=%u ", conntrack->mark))
	189	return -ENOSPC;
	190	#endif
	191
7c9728c3 JM	192	#ifdef CONFIG_NF_CONNTRACK_SECMARK
	193	if (seq_printf(s, "secmark=%u ", conntrack->secmark))
	194	return -ENOSPC;
	195	#endif
	196
9fb9cbb1 YK	197	if (seq_printf(s, "use=%u\n", atomic_read(&conntrack->ct_general.use)))
	198	return -ENOSPC;
	199
	200	return 0;
	201	}
	202
	203	static struct seq_operations ct_seq_ops = {
	204	.start = ct_seq_start,
	205	.next = ct_seq_next,
	206	.stop = ct_seq_stop,
	207	.show = ct_seq_show
	208	};
	209
	210	static int ct_open(struct inode inode, struct file file)
	211	{
	212	struct seq_file *seq;
	213	struct ct_iter_state *st;
	214	int ret;
	215
	216	st = kmalloc(sizeof(struct ct_iter_state), GFP_KERNEL);
	217	if (st == NULL)
	218	return -ENOMEM;
	219	ret = seq_open(file, &ct_seq_ops);
	220	if (ret)
	221	goto out_free;
	222	seq = file->private_data;
	223	seq->private = st;
	224	memset(st, 0, sizeof(struct ct_iter_state));
	225	return ret;
	226	out_free:
	227	kfree(st);
	228	return ret;
	229	}
	230
	231	static struct file_operations ct_file_ops = {
	232	.owner = THIS_MODULE,
	233	.open = ct_open,
	234	.read = seq_read,
	235	.llseek = seq_lseek,
	236	.release = seq_release_private,
	237	};
	238
9fb9cbb1 YK	239	static void ct_cpu_seq_start(struct seq_file seq, loff_t *pos)
	240	{
	241	int cpu;
	242
	243	if (*pos == 0)
	244	return SEQ_START_TOKEN;
	245
	246	for (cpu = *pos-1; cpu < NR_CPUS; ++cpu) {
	247	if (!cpu_possible(cpu))
	248	continue;
	249	*pos = cpu + 1;
	250	return &per_cpu(nf_conntrack_stat, cpu);
	251	}
	252
	253	return NULL;
	254	}
	255
	256	static void ct_cpu_seq_next(struct seq_file seq, void v, loff_t pos)
	257	{
	258	int cpu;
	259
	260	for (cpu = *pos; cpu < NR_CPUS; ++cpu) {
	261	if (!cpu_possible(cpu))
	262	continue;
	263	*pos = cpu + 1;
	264	return &per_cpu(nf_conntrack_stat, cpu);
	265	}
	266
	267	return NULL;
	268	}
	269
	270	static void ct_cpu_seq_stop(struct seq_file seq, void v)
	271	{
	272	}
	273
	274	static int ct_cpu_seq_show(struct seq_file seq, void v)
	275	{
	276	unsigned int nr_conntracks = atomic_read(&nf_conntrack_count);
	277	struct ip_conntrack_stat *st = v;
	278
	279	if (v == SEQ_START_TOKEN) {
	280	seq_printf(seq, "entries searched found new invalid ignore delete delete_list insert insert_failed drop early_drop icmp_error expect_new expect_create expect_delete\n");
	281	return 0;
	282	}
	283
	284	seq_printf(seq, "%08x %08x %08x %08x %08x %08x %08x %08x "
	285	"%08x %08x %08x %08x %08x %08x %08x %08x \n",
	286	nr_conntracks,
	287	st->searched,
	288	st->found,
	289	st->new,
	290	st->invalid,
	291	st->ignore,
	292	st->delete,
	293	st->delete_list,
	294	st->insert,
	295	st->insert_failed,
	296	st->drop,
	297	st->early_drop,
	298	st->error,
	299
	300	st->expect_new,
	301	st->expect_create,
	302	st->expect_delete
303	);
304	return 0;
305	}
306
307	static struct seq_operations ct_cpu_seq_ops = {
308	.start = ct_cpu_seq_start,
309	.next = ct_cpu_seq_next,
310	.stop = ct_cpu_seq_stop,
311	.show = ct_cpu_seq_show,
312	};
313
314	static int ct_cpu_seq_open(struct inode inode, struct file file)
315	{
316	return seq_open(file, &ct_cpu_seq_ops);
317	}
318
319	static struct file_operations ct_cpu_seq_fops = {
320	.owner = THIS_MODULE,
321	.open = ct_cpu_seq_open,
322	.read = seq_read,
323	.llseek = seq_lseek,
324	.release = seq_release_private,
325	};
326	#endif /* CONFIG_PROC_FS */
327
328	/* Sysctl support */
329
94aec08e	330	int nf_conntrack_checksum __read_mostly = 1;
72b55823	331
9fb9cbb1	332	#ifdef CONFIG_SYSCTL
9fb9cbb1 YK	333	/* Log invalid packets of a given protocol */
	334	static int log_invalid_proto_min = 0;
	335	static int log_invalid_proto_max = 255;
	336
	337	static struct ctl_table_header *nf_ct_sysctl_header;
	338
	339	static ctl_table nf_ct_sysctl_table[] = {
	340	{
	341	.ctl_name = NET_NF_CONNTRACK_MAX,
	342	.procname = "nf_conntrack_max",
	343	.data = &nf_conntrack_max,
	344	.maxlen = sizeof(int),
	345	.mode = 0644,
	346	.proc_handler = &proc_dointvec,
	347	},
	348	{
	349	.ctl_name = NET_NF_CONNTRACK_COUNT,
	350	.procname = "nf_conntrack_count",
	351	.data = &nf_conntrack_count,
	352	.maxlen = sizeof(int),
	353	.mode = 0444,
	354	.proc_handler = &proc_dointvec,
	355	},
	356	{
	357	.ctl_name = NET_NF_CONNTRACK_BUCKETS,
	358	.procname = "nf_conntrack_buckets",
	359	.data = &nf_conntrack_htable_size,
	360	.maxlen = sizeof(unsigned int),
	361	.mode = 0444,
	362	.proc_handler = &proc_dointvec,
	363	},
39a27a35 PM	364	{
	365	.ctl_name = NET_NF_CONNTRACK_CHECKSUM,
	366	.procname = "nf_conntrack_checksum",
	367	.data = &nf_conntrack_checksum,
	368	.maxlen = sizeof(unsigned int),
	369	.mode = 0644,
	370	.proc_handler = &proc_dointvec,
	371	},
9fb9cbb1 YK	372	{
	373	.ctl_name = NET_NF_CONNTRACK_LOG_INVALID,
	374	.procname = "nf_conntrack_log_invalid",
	375	.data = &nf_ct_log_invalid,
	376	.maxlen = sizeof(unsigned int),
	377	.mode = 0644,
	378	.proc_handler = &proc_dointvec_minmax,
	379	.strategy = &sysctl_intvec,
	380	.extra1 = &log_invalid_proto_min,
	381	.extra2 = &log_invalid_proto_max,
	382	},
9fb9cbb1 YK	383
	384	{ .ctl_name = 0 }
	385	};
	386
	387	#define NET_NF_CONNTRACK_MAX 2089
	388
	389	static ctl_table nf_ct_netfilter_table[] = {
	390	{
	391	.ctl_name = NET_NETFILTER,
	392	.procname = "netfilter",
	393	.mode = 0555,
	394	.child = nf_ct_sysctl_table,
	395	},
	396	{
	397	.ctl_name = NET_NF_CONNTRACK_MAX,
	398	.procname = "nf_conntrack_max",
	399	.data = &nf_conntrack_max,
	400	.maxlen = sizeof(int),
	401	.mode = 0644,
	402	.proc_handler = &proc_dointvec,
	403	},
	404	{ .ctl_name = 0 }
	405	};
	406
	407	static ctl_table nf_ct_net_table[] = {
	408	{
	409	.ctl_name = CTL_NET,
	410	.procname = "net",
	411	.mode = 0555,
	412	.child = nf_ct_netfilter_table,
	413	},
	414	{ .ctl_name = 0 }
	415	};
	416	EXPORT_SYMBOL(nf_ct_log_invalid);
	417	#endif /* CONFIG_SYSCTL */
	418
65b4b4e8	419	static int __init nf_conntrack_standalone_init(void)
9fb9cbb1	420	{
32292a7f PM	421	#ifdef CONFIG_PROC_FS
	422	struct proc_dir_entry proc, proc_exp, *proc_stat;
	423	#endif
	424	int ret = 0;
	425
	426	ret = nf_conntrack_init();
	427	if (ret < 0)
	428	return ret;
	429
	430	#ifdef CONFIG_PROC_FS
	431	proc = proc_net_fops_create("nf_conntrack", 0440, &ct_file_ops);
	432	if (!proc) goto cleanup_init;
	433
	434	proc_exp = proc_net_fops_create("nf_conntrack_expect", 0440,
	435	&exp_file_ops);
	436	if (!proc_exp) goto cleanup_proc;
	437
	438	proc_stat = create_proc_entry("nf_conntrack", S_IRUGO, proc_net_stat);
	439	if (!proc_stat)
	440	goto cleanup_proc_exp;
	441
	442	proc_stat->proc_fops = &ct_cpu_seq_fops;
	443	proc_stat->owner = THIS_MODULE;
	444	#endif
	445	#ifdef CONFIG_SYSCTL
	446	nf_ct_sysctl_header = register_sysctl_table(nf_ct_net_table, 0);
	447	if (nf_ct_sysctl_header == NULL) {
	448	printk("nf_conntrack: can't register to sysctl.\n");
	449	ret = -ENOMEM;
	450	goto cleanup_proc_stat;
	451	}
	452	#endif
	453	return ret;
	454
	455	#ifdef CONFIG_SYSCTL
	456	cleanup_proc_stat:
	457	#endif
	458	#ifdef CONFIG_PROC_FS
	459	remove_proc_entry("nf_conntrack", proc_net_stat);
	460	cleanup_proc_exp:
	461	proc_net_remove("nf_conntrack_expect");
	462	cleanup_proc:
	463	proc_net_remove("nf_conntrack");
	464	cleanup_init:
	465	#endif /* CNFIG_PROC_FS */
	466	nf_conntrack_cleanup();
	467	return ret;
9fb9cbb1 YK	468	}
9fb9cbb1 YK	469
65b4b4e8	470	static void __exit nf_conntrack_standalone_fini(void)
9fb9cbb1	471	{
32292a7f PM	472	#ifdef CONFIG_SYSCTL
	473	unregister_sysctl_table(nf_ct_sysctl_header);
	474	#endif
	475	#ifdef CONFIG_PROC_FS
	476	remove_proc_entry("nf_conntrack", proc_net_stat);
	477	proc_net_remove("nf_conntrack_expect");
	478	proc_net_remove("nf_conntrack");
	479	#endif /* CNFIG_PROC_FS */
	480	nf_conntrack_cleanup();
9fb9cbb1 YK	481	}
9fb9cbb1 YK	482
65b4b4e8 AM	483	module_init(nf_conntrack_standalone_init);
65b4b4e8 AM	484	module_exit(nf_conntrack_standalone_fini);
9fb9cbb1 YK	485
	486	/* Some modules need us, but don't depend directly on any symbol.
	487	They should call this. */
2e4e6a17	488	void need_conntrack(void)
9fb9cbb1 YK	489	{
	490	}
	491
	492	#ifdef CONFIG_NF_CONNTRACK_EVENTS
	493	EXPORT_SYMBOL_GPL(nf_conntrack_chain);
	494	EXPORT_SYMBOL_GPL(nf_conntrack_expect_chain);
	495	EXPORT_SYMBOL_GPL(nf_conntrack_register_notifier);
	496	EXPORT_SYMBOL_GPL(nf_conntrack_unregister_notifier);
	497	EXPORT_SYMBOL_GPL(__nf_ct_event_cache_init);
	498	EXPORT_PER_CPU_SYMBOL_GPL(nf_conntrack_ecache);
	499	EXPORT_SYMBOL_GPL(nf_ct_deliver_cached_events);
	500	#endif
b9f78f9f PNA	501	EXPORT_SYMBOL(nf_ct_l3proto_try_module_get);
b9f78f9f PNA	502	EXPORT_SYMBOL(nf_ct_l3proto_module_put);
9fb9cbb1 YK	503	EXPORT_SYMBOL(nf_conntrack_l3proto_register);
9fb9cbb1 YK	504	EXPORT_SYMBOL(nf_conntrack_l3proto_unregister);
605dcad6 MJ	505	EXPORT_SYMBOL(nf_conntrack_l4proto_register);
605dcad6 MJ	506	EXPORT_SYMBOL(nf_conntrack_l4proto_unregister);
9fb9cbb1	507	EXPORT_SYMBOL(nf_ct_invert_tuplepr);
9fb9cbb1	508	EXPORT_SYMBOL(nf_conntrack_destroyed);
2e4e6a17	509	EXPORT_SYMBOL(need_conntrack);
9fb9cbb1 YK	510	EXPORT_SYMBOL(nf_conntrack_helper_register);
	511	EXPORT_SYMBOL(nf_conntrack_helper_unregister);
	512	EXPORT_SYMBOL(nf_ct_iterate_cleanup);
	513	EXPORT_SYMBOL(__nf_ct_refresh_acct);
	514	EXPORT_SYMBOL(nf_ct_protos);
605dcad6 MJ	515	EXPORT_SYMBOL(__nf_ct_l4proto_find);
	516	EXPORT_SYMBOL(nf_ct_l4proto_find_get);
	517	EXPORT_SYMBOL(nf_ct_l4proto_put);
c1d10adb PNA	518	EXPORT_SYMBOL(nf_ct_l3proto_find_get);
c1d10adb PNA	519	EXPORT_SYMBOL(nf_ct_l3proto_put);
9fb9cbb1	520	EXPORT_SYMBOL(nf_ct_l3protos);
39a27a35	521	EXPORT_SYMBOL_GPL(nf_conntrack_checksum);
9fb9cbb1 YK	522	EXPORT_SYMBOL(nf_conntrack_expect_alloc);
	523	EXPORT_SYMBOL(nf_conntrack_expect_put);
	524	EXPORT_SYMBOL(nf_conntrack_expect_related);
	525	EXPORT_SYMBOL(nf_conntrack_unexpect_related);
	526	EXPORT_SYMBOL(nf_conntrack_tuple_taken);
	527	EXPORT_SYMBOL(nf_conntrack_htable_size);
	528	EXPORT_SYMBOL(nf_conntrack_lock);
	529	EXPORT_SYMBOL(nf_conntrack_hash);
	530	EXPORT_SYMBOL(nf_conntrack_untracked);
	531	EXPORT_SYMBOL_GPL(nf_conntrack_find_get);
	532	#ifdef CONFIG_IP_NF_NAT_NEEDED
	533	EXPORT_SYMBOL(nf_conntrack_tcp_update);
	534	#endif
	535	EXPORT_SYMBOL(__nf_conntrack_confirm);
	536	EXPORT_SYMBOL(nf_ct_get_tuple);
	537	EXPORT_SYMBOL(nf_ct_invert_tuple);
	538	EXPORT_SYMBOL(nf_conntrack_in);
	539	EXPORT_SYMBOL(__nf_conntrack_attach);
c1d10adb PNA	540	EXPORT_SYMBOL(nf_conntrack_alloc);
	541	EXPORT_SYMBOL(nf_conntrack_free);
	542	EXPORT_SYMBOL(nf_conntrack_flush);
	543	EXPORT_SYMBOL(nf_ct_remove_expectations);
	544	EXPORT_SYMBOL(nf_ct_helper_find_get);
	545	EXPORT_SYMBOL(nf_ct_helper_put);
	546	EXPORT_SYMBOL(__nf_conntrack_helper_find_byname);
	547	EXPORT_SYMBOL(__nf_conntrack_find);
	548	EXPORT_SYMBOL(nf_ct_unlink_expect);
	549	EXPORT_SYMBOL(nf_conntrack_hash_insert);
	550	EXPORT_SYMBOL(__nf_conntrack_expect_find);
	551	EXPORT_SYMBOL(nf_conntrack_expect_find);
	552	EXPORT_SYMBOL(nf_conntrack_expect_list);
	553	#if defined(CONFIG_NF_CT_NETLINK) \|\| \
	554	defined(CONFIG_NF_CT_NETLINK_MODULE)
	555	EXPORT_SYMBOL(nf_ct_port_tuple_to_nfattr);
	556	EXPORT_SYMBOL(nf_ct_port_nfattr_to_tuple);
	557	#endif