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![Patrick McHardy](/assets/img/avatar_default.png)
Kill listhelp.h and use the list.h functions instead. Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
967 lines
24 KiB
C
967 lines
24 KiB
C
/* This file contains all the functions required for the standalone
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ip_conntrack module.
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These are not required by the compatibility layer.
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*/
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/* (C) 1999-2001 Paul `Rusty' Russell
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* (C) 2002-2005 Netfilter Core Team <coreteam@netfilter.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/types.h>
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#include <linux/ip.h>
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#include <linux/netfilter.h>
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#include <linux/netfilter_ipv4.h>
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#include <linux/module.h>
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#include <linux/skbuff.h>
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#include <linux/proc_fs.h>
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#include <linux/seq_file.h>
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#include <linux/percpu.h>
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#ifdef CONFIG_SYSCTL
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#include <linux/sysctl.h>
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#endif
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#include <net/checksum.h>
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#include <net/ip.h>
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#include <net/route.h>
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#define ASSERT_READ_LOCK(x)
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#define ASSERT_WRITE_LOCK(x)
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#include <linux/netfilter_ipv4/ip_conntrack.h>
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#include <linux/netfilter_ipv4/ip_conntrack_protocol.h>
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#include <linux/netfilter_ipv4/ip_conntrack_core.h>
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#include <linux/netfilter_ipv4/ip_conntrack_helper.h>
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#if 0
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#define DEBUGP printk
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#else
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#define DEBUGP(format, args...)
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#endif
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MODULE_LICENSE("GPL");
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extern atomic_t ip_conntrack_count;
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DECLARE_PER_CPU(struct ip_conntrack_stat, ip_conntrack_stat);
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static int kill_proto(struct ip_conntrack *i, void *data)
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{
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return (i->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.protonum ==
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*((u_int8_t *) data));
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}
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#ifdef CONFIG_PROC_FS
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static int
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print_tuple(struct seq_file *s, const struct ip_conntrack_tuple *tuple,
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struct ip_conntrack_protocol *proto)
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{
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seq_printf(s, "src=%u.%u.%u.%u dst=%u.%u.%u.%u ",
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NIPQUAD(tuple->src.ip), NIPQUAD(tuple->dst.ip));
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return proto->print_tuple(s, tuple);
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}
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#ifdef CONFIG_IP_NF_CT_ACCT
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static unsigned int
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seq_print_counters(struct seq_file *s,
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const struct ip_conntrack_counter *counter)
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{
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return seq_printf(s, "packets=%llu bytes=%llu ",
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(unsigned long long)counter->packets,
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(unsigned long long)counter->bytes);
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}
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#else
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#define seq_print_counters(x, y) 0
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#endif
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struct ct_iter_state {
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unsigned int bucket;
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};
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static struct list_head *ct_get_first(struct seq_file *seq)
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{
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struct ct_iter_state *st = seq->private;
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for (st->bucket = 0;
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st->bucket < ip_conntrack_htable_size;
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st->bucket++) {
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if (!list_empty(&ip_conntrack_hash[st->bucket]))
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return ip_conntrack_hash[st->bucket].next;
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}
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return NULL;
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}
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static struct list_head *ct_get_next(struct seq_file *seq, struct list_head *head)
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{
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struct ct_iter_state *st = seq->private;
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head = head->next;
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while (head == &ip_conntrack_hash[st->bucket]) {
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if (++st->bucket >= ip_conntrack_htable_size)
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return NULL;
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head = ip_conntrack_hash[st->bucket].next;
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}
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return head;
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}
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static struct list_head *ct_get_idx(struct seq_file *seq, loff_t pos)
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{
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struct list_head *head = ct_get_first(seq);
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if (head)
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while (pos && (head = ct_get_next(seq, head)))
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pos--;
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return pos ? NULL : head;
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}
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static void *ct_seq_start(struct seq_file *seq, loff_t *pos)
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{
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read_lock_bh(&ip_conntrack_lock);
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return ct_get_idx(seq, *pos);
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}
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static void *ct_seq_next(struct seq_file *s, void *v, loff_t *pos)
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{
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(*pos)++;
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return ct_get_next(s, v);
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}
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static void ct_seq_stop(struct seq_file *s, void *v)
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{
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read_unlock_bh(&ip_conntrack_lock);
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}
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static int ct_seq_show(struct seq_file *s, void *v)
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{
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const struct ip_conntrack_tuple_hash *hash = v;
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const struct ip_conntrack *conntrack = tuplehash_to_ctrack(hash);
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struct ip_conntrack_protocol *proto;
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ASSERT_READ_LOCK(&ip_conntrack_lock);
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IP_NF_ASSERT(conntrack);
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/* we only want to print DIR_ORIGINAL */
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if (DIRECTION(hash))
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return 0;
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proto = __ip_conntrack_proto_find(conntrack->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.protonum);
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IP_NF_ASSERT(proto);
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if (seq_printf(s, "%-8s %u %ld ",
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proto->name,
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conntrack->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.protonum,
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timer_pending(&conntrack->timeout)
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? (long)(conntrack->timeout.expires - jiffies)/HZ
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: 0) != 0)
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return -ENOSPC;
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if (proto->print_conntrack(s, conntrack))
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return -ENOSPC;
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if (print_tuple(s, &conntrack->tuplehash[IP_CT_DIR_ORIGINAL].tuple,
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proto))
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return -ENOSPC;
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if (seq_print_counters(s, &conntrack->counters[IP_CT_DIR_ORIGINAL]))
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return -ENOSPC;
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if (!(test_bit(IPS_SEEN_REPLY_BIT, &conntrack->status)))
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if (seq_printf(s, "[UNREPLIED] "))
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return -ENOSPC;
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if (print_tuple(s, &conntrack->tuplehash[IP_CT_DIR_REPLY].tuple,
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proto))
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return -ENOSPC;
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if (seq_print_counters(s, &conntrack->counters[IP_CT_DIR_REPLY]))
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return -ENOSPC;
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if (test_bit(IPS_ASSURED_BIT, &conntrack->status))
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if (seq_printf(s, "[ASSURED] "))
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return -ENOSPC;
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#if defined(CONFIG_IP_NF_CONNTRACK_MARK)
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if (seq_printf(s, "mark=%u ", conntrack->mark))
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return -ENOSPC;
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#endif
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#ifdef CONFIG_IP_NF_CONNTRACK_SECMARK
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if (seq_printf(s, "secmark=%u ", conntrack->secmark))
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return -ENOSPC;
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#endif
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if (seq_printf(s, "use=%u\n", atomic_read(&conntrack->ct_general.use)))
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return -ENOSPC;
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return 0;
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}
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static struct seq_operations ct_seq_ops = {
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.start = ct_seq_start,
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.next = ct_seq_next,
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.stop = ct_seq_stop,
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.show = ct_seq_show
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};
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static int ct_open(struct inode *inode, struct file *file)
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{
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struct seq_file *seq;
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struct ct_iter_state *st;
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int ret;
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st = kmalloc(sizeof(struct ct_iter_state), GFP_KERNEL);
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if (st == NULL)
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return -ENOMEM;
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ret = seq_open(file, &ct_seq_ops);
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if (ret)
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goto out_free;
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seq = file->private_data;
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seq->private = st;
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memset(st, 0, sizeof(struct ct_iter_state));
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return ret;
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out_free:
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kfree(st);
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return ret;
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}
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static struct file_operations ct_file_ops = {
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.owner = THIS_MODULE,
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.open = ct_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = seq_release_private,
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};
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/* expects */
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static void *exp_seq_start(struct seq_file *s, loff_t *pos)
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{
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struct list_head *e = &ip_conntrack_expect_list;
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loff_t i;
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/* strange seq_file api calls stop even if we fail,
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* thus we need to grab lock since stop unlocks */
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read_lock_bh(&ip_conntrack_lock);
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if (list_empty(e))
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return NULL;
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for (i = 0; i <= *pos; i++) {
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e = e->next;
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if (e == &ip_conntrack_expect_list)
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return NULL;
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}
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return e;
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}
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static void *exp_seq_next(struct seq_file *s, void *v, loff_t *pos)
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{
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struct list_head *e = v;
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++*pos;
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e = e->next;
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if (e == &ip_conntrack_expect_list)
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return NULL;
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return e;
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}
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static void exp_seq_stop(struct seq_file *s, void *v)
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{
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read_unlock_bh(&ip_conntrack_lock);
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}
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static int exp_seq_show(struct seq_file *s, void *v)
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{
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struct ip_conntrack_expect *expect = v;
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if (expect->timeout.function)
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seq_printf(s, "%ld ", timer_pending(&expect->timeout)
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? (long)(expect->timeout.expires - jiffies)/HZ : 0);
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else
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seq_printf(s, "- ");
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seq_printf(s, "proto=%u ", expect->tuple.dst.protonum);
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print_tuple(s, &expect->tuple,
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__ip_conntrack_proto_find(expect->tuple.dst.protonum));
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return seq_putc(s, '\n');
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}
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static struct seq_operations exp_seq_ops = {
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.start = exp_seq_start,
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.next = exp_seq_next,
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.stop = exp_seq_stop,
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.show = exp_seq_show
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};
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static int exp_open(struct inode *inode, struct file *file)
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{
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return seq_open(file, &exp_seq_ops);
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}
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static struct file_operations exp_file_ops = {
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.owner = THIS_MODULE,
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.open = exp_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = seq_release
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};
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static void *ct_cpu_seq_start(struct seq_file *seq, loff_t *pos)
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{
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int cpu;
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if (*pos == 0)
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return SEQ_START_TOKEN;
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for (cpu = *pos-1; cpu < NR_CPUS; ++cpu) {
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if (!cpu_possible(cpu))
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continue;
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*pos = cpu+1;
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return &per_cpu(ip_conntrack_stat, cpu);
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}
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return NULL;
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}
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static void *ct_cpu_seq_next(struct seq_file *seq, void *v, loff_t *pos)
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{
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int cpu;
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for (cpu = *pos; cpu < NR_CPUS; ++cpu) {
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if (!cpu_possible(cpu))
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continue;
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*pos = cpu+1;
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return &per_cpu(ip_conntrack_stat, cpu);
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}
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return NULL;
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}
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static void ct_cpu_seq_stop(struct seq_file *seq, void *v)
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{
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}
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static int ct_cpu_seq_show(struct seq_file *seq, void *v)
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{
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unsigned int nr_conntracks = atomic_read(&ip_conntrack_count);
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struct ip_conntrack_stat *st = v;
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if (v == SEQ_START_TOKEN) {
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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");
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return 0;
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}
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seq_printf(seq, "%08x %08x %08x %08x %08x %08x %08x %08x "
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"%08x %08x %08x %08x %08x %08x %08x %08x \n",
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nr_conntracks,
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st->searched,
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st->found,
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st->new,
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st->invalid,
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st->ignore,
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st->delete,
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st->delete_list,
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st->insert,
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st->insert_failed,
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st->drop,
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st->early_drop,
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st->error,
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st->expect_new,
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st->expect_create,
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st->expect_delete
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);
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return 0;
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}
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static struct seq_operations ct_cpu_seq_ops = {
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.start = ct_cpu_seq_start,
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.next = ct_cpu_seq_next,
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.stop = ct_cpu_seq_stop,
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.show = ct_cpu_seq_show,
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};
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static int ct_cpu_seq_open(struct inode *inode, struct file *file)
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{
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return seq_open(file, &ct_cpu_seq_ops);
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}
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static struct file_operations ct_cpu_seq_fops = {
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.owner = THIS_MODULE,
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.open = ct_cpu_seq_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = seq_release_private,
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};
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#endif
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static unsigned int ip_confirm(unsigned int hooknum,
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struct sk_buff **pskb,
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const struct net_device *in,
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const struct net_device *out,
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int (*okfn)(struct sk_buff *))
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{
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/* We've seen it coming out the other side: confirm it */
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return ip_conntrack_confirm(pskb);
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}
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static unsigned int ip_conntrack_help(unsigned int hooknum,
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struct sk_buff **pskb,
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const struct net_device *in,
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const struct net_device *out,
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int (*okfn)(struct sk_buff *))
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{
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struct ip_conntrack *ct;
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enum ip_conntrack_info ctinfo;
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/* This is where we call the helper: as the packet goes out. */
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ct = ip_conntrack_get(*pskb, &ctinfo);
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if (ct && ct->helper && ctinfo != IP_CT_RELATED + IP_CT_IS_REPLY) {
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unsigned int ret;
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ret = ct->helper->help(pskb, ct, ctinfo);
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if (ret != NF_ACCEPT)
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return ret;
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}
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return NF_ACCEPT;
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}
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static unsigned int ip_conntrack_defrag(unsigned int hooknum,
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struct sk_buff **pskb,
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const struct net_device *in,
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const struct net_device *out,
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int (*okfn)(struct sk_buff *))
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{
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#if !defined(CONFIG_IP_NF_NAT) && !defined(CONFIG_IP_NF_NAT_MODULE)
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/* Previously seen (loopback)? Ignore. Do this before
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fragment check. */
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if ((*pskb)->nfct)
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return NF_ACCEPT;
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#endif
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/* Gather fragments. */
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if ((*pskb)->nh.iph->frag_off & htons(IP_MF|IP_OFFSET)) {
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*pskb = ip_ct_gather_frags(*pskb,
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hooknum == NF_IP_PRE_ROUTING ?
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IP_DEFRAG_CONNTRACK_IN :
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IP_DEFRAG_CONNTRACK_OUT);
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if (!*pskb)
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return NF_STOLEN;
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}
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return NF_ACCEPT;
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}
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static unsigned int ip_conntrack_local(unsigned int hooknum,
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struct sk_buff **pskb,
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const struct net_device *in,
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const struct net_device *out,
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int (*okfn)(struct sk_buff *))
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{
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/* root is playing with raw sockets. */
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if ((*pskb)->len < sizeof(struct iphdr)
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|| (*pskb)->nh.iph->ihl * 4 < sizeof(struct iphdr)) {
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if (net_ratelimit())
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printk("ipt_hook: happy cracking.\n");
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return NF_ACCEPT;
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}
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return ip_conntrack_in(hooknum, pskb, in, out, okfn);
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}
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/* Connection tracking may drop packets, but never alters them, so
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make it the first hook. */
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static struct nf_hook_ops ip_conntrack_ops[] = {
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{
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.hook = ip_conntrack_defrag,
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.owner = THIS_MODULE,
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.pf = PF_INET,
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.hooknum = NF_IP_PRE_ROUTING,
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.priority = NF_IP_PRI_CONNTRACK_DEFRAG,
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},
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{
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.hook = ip_conntrack_in,
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.owner = THIS_MODULE,
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.pf = PF_INET,
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.hooknum = NF_IP_PRE_ROUTING,
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.priority = NF_IP_PRI_CONNTRACK,
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},
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{
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.hook = ip_conntrack_defrag,
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.owner = THIS_MODULE,
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.pf = PF_INET,
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.hooknum = NF_IP_LOCAL_OUT,
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.priority = NF_IP_PRI_CONNTRACK_DEFRAG,
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},
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{
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.hook = ip_conntrack_local,
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.owner = THIS_MODULE,
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.pf = PF_INET,
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.hooknum = NF_IP_LOCAL_OUT,
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.priority = NF_IP_PRI_CONNTRACK,
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},
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{
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.hook = ip_conntrack_help,
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.owner = THIS_MODULE,
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.pf = PF_INET,
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.hooknum = NF_IP_POST_ROUTING,
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.priority = NF_IP_PRI_CONNTRACK_HELPER,
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},
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{
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.hook = ip_conntrack_help,
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.owner = THIS_MODULE,
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.pf = PF_INET,
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.hooknum = NF_IP_LOCAL_IN,
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.priority = NF_IP_PRI_CONNTRACK_HELPER,
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},
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{
|
|
.hook = ip_confirm,
|
|
.owner = THIS_MODULE,
|
|
.pf = PF_INET,
|
|
.hooknum = NF_IP_POST_ROUTING,
|
|
.priority = NF_IP_PRI_CONNTRACK_CONFIRM,
|
|
},
|
|
{
|
|
.hook = ip_confirm,
|
|
.owner = THIS_MODULE,
|
|
.pf = PF_INET,
|
|
.hooknum = NF_IP_LOCAL_IN,
|
|
.priority = NF_IP_PRI_CONNTRACK_CONFIRM,
|
|
},
|
|
};
|
|
|
|
/* Sysctl support */
|
|
|
|
int ip_conntrack_checksum __read_mostly = 1;
|
|
|
|
#ifdef CONFIG_SYSCTL
|
|
|
|
/* From ip_conntrack_core.c */
|
|
extern int ip_conntrack_max;
|
|
extern unsigned int ip_conntrack_htable_size;
|
|
|
|
/* From ip_conntrack_proto_tcp.c */
|
|
extern unsigned int ip_ct_tcp_timeout_syn_sent;
|
|
extern unsigned int ip_ct_tcp_timeout_syn_recv;
|
|
extern unsigned int ip_ct_tcp_timeout_established;
|
|
extern unsigned int ip_ct_tcp_timeout_fin_wait;
|
|
extern unsigned int ip_ct_tcp_timeout_close_wait;
|
|
extern unsigned int ip_ct_tcp_timeout_last_ack;
|
|
extern unsigned int ip_ct_tcp_timeout_time_wait;
|
|
extern unsigned int ip_ct_tcp_timeout_close;
|
|
extern unsigned int ip_ct_tcp_timeout_max_retrans;
|
|
extern int ip_ct_tcp_loose;
|
|
extern int ip_ct_tcp_be_liberal;
|
|
extern int ip_ct_tcp_max_retrans;
|
|
|
|
/* From ip_conntrack_proto_udp.c */
|
|
extern unsigned int ip_ct_udp_timeout;
|
|
extern unsigned int ip_ct_udp_timeout_stream;
|
|
|
|
/* From ip_conntrack_proto_icmp.c */
|
|
extern unsigned int ip_ct_icmp_timeout;
|
|
|
|
/* From ip_conntrack_proto_generic.c */
|
|
extern unsigned int ip_ct_generic_timeout;
|
|
|
|
/* 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 *ip_ct_sysctl_header;
|
|
|
|
static ctl_table ip_ct_sysctl_table[] = {
|
|
{
|
|
.ctl_name = NET_IPV4_NF_CONNTRACK_MAX,
|
|
.procname = "ip_conntrack_max",
|
|
.data = &ip_conntrack_max,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dointvec,
|
|
},
|
|
{
|
|
.ctl_name = NET_IPV4_NF_CONNTRACK_COUNT,
|
|
.procname = "ip_conntrack_count",
|
|
.data = &ip_conntrack_count,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0444,
|
|
.proc_handler = &proc_dointvec,
|
|
},
|
|
{
|
|
.ctl_name = NET_IPV4_NF_CONNTRACK_BUCKETS,
|
|
.procname = "ip_conntrack_buckets",
|
|
.data = &ip_conntrack_htable_size,
|
|
.maxlen = sizeof(unsigned int),
|
|
.mode = 0444,
|
|
.proc_handler = &proc_dointvec,
|
|
},
|
|
{
|
|
.ctl_name = NET_IPV4_NF_CONNTRACK_CHECKSUM,
|
|
.procname = "ip_conntrack_checksum",
|
|
.data = &ip_conntrack_checksum,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dointvec,
|
|
},
|
|
{
|
|
.ctl_name = NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_SYN_SENT,
|
|
.procname = "ip_conntrack_tcp_timeout_syn_sent",
|
|
.data = &ip_ct_tcp_timeout_syn_sent,
|
|
.maxlen = sizeof(unsigned int),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dointvec_jiffies,
|
|
},
|
|
{
|
|
.ctl_name = NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_SYN_RECV,
|
|
.procname = "ip_conntrack_tcp_timeout_syn_recv",
|
|
.data = &ip_ct_tcp_timeout_syn_recv,
|
|
.maxlen = sizeof(unsigned int),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dointvec_jiffies,
|
|
},
|
|
{
|
|
.ctl_name = NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_ESTABLISHED,
|
|
.procname = "ip_conntrack_tcp_timeout_established",
|
|
.data = &ip_ct_tcp_timeout_established,
|
|
.maxlen = sizeof(unsigned int),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dointvec_jiffies,
|
|
},
|
|
{
|
|
.ctl_name = NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_FIN_WAIT,
|
|
.procname = "ip_conntrack_tcp_timeout_fin_wait",
|
|
.data = &ip_ct_tcp_timeout_fin_wait,
|
|
.maxlen = sizeof(unsigned int),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dointvec_jiffies,
|
|
},
|
|
{
|
|
.ctl_name = NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_CLOSE_WAIT,
|
|
.procname = "ip_conntrack_tcp_timeout_close_wait",
|
|
.data = &ip_ct_tcp_timeout_close_wait,
|
|
.maxlen = sizeof(unsigned int),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dointvec_jiffies,
|
|
},
|
|
{
|
|
.ctl_name = NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_LAST_ACK,
|
|
.procname = "ip_conntrack_tcp_timeout_last_ack",
|
|
.data = &ip_ct_tcp_timeout_last_ack,
|
|
.maxlen = sizeof(unsigned int),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dointvec_jiffies,
|
|
},
|
|
{
|
|
.ctl_name = NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_TIME_WAIT,
|
|
.procname = "ip_conntrack_tcp_timeout_time_wait",
|
|
.data = &ip_ct_tcp_timeout_time_wait,
|
|
.maxlen = sizeof(unsigned int),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dointvec_jiffies,
|
|
},
|
|
{
|
|
.ctl_name = NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_CLOSE,
|
|
.procname = "ip_conntrack_tcp_timeout_close",
|
|
.data = &ip_ct_tcp_timeout_close,
|
|
.maxlen = sizeof(unsigned int),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dointvec_jiffies,
|
|
},
|
|
{
|
|
.ctl_name = NET_IPV4_NF_CONNTRACK_UDP_TIMEOUT,
|
|
.procname = "ip_conntrack_udp_timeout",
|
|
.data = &ip_ct_udp_timeout,
|
|
.maxlen = sizeof(unsigned int),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dointvec_jiffies,
|
|
},
|
|
{
|
|
.ctl_name = NET_IPV4_NF_CONNTRACK_UDP_TIMEOUT_STREAM,
|
|
.procname = "ip_conntrack_udp_timeout_stream",
|
|
.data = &ip_ct_udp_timeout_stream,
|
|
.maxlen = sizeof(unsigned int),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dointvec_jiffies,
|
|
},
|
|
{
|
|
.ctl_name = NET_IPV4_NF_CONNTRACK_ICMP_TIMEOUT,
|
|
.procname = "ip_conntrack_icmp_timeout",
|
|
.data = &ip_ct_icmp_timeout,
|
|
.maxlen = sizeof(unsigned int),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dointvec_jiffies,
|
|
},
|
|
{
|
|
.ctl_name = NET_IPV4_NF_CONNTRACK_GENERIC_TIMEOUT,
|
|
.procname = "ip_conntrack_generic_timeout",
|
|
.data = &ip_ct_generic_timeout,
|
|
.maxlen = sizeof(unsigned int),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dointvec_jiffies,
|
|
},
|
|
{
|
|
.ctl_name = NET_IPV4_NF_CONNTRACK_LOG_INVALID,
|
|
.procname = "ip_conntrack_log_invalid",
|
|
.data = &ip_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 = NET_IPV4_NF_CONNTRACK_TCP_TIMEOUT_MAX_RETRANS,
|
|
.procname = "ip_conntrack_tcp_timeout_max_retrans",
|
|
.data = &ip_ct_tcp_timeout_max_retrans,
|
|
.maxlen = sizeof(unsigned int),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dointvec_jiffies,
|
|
},
|
|
{
|
|
.ctl_name = NET_IPV4_NF_CONNTRACK_TCP_LOOSE,
|
|
.procname = "ip_conntrack_tcp_loose",
|
|
.data = &ip_ct_tcp_loose,
|
|
.maxlen = sizeof(unsigned int),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dointvec,
|
|
},
|
|
{
|
|
.ctl_name = NET_IPV4_NF_CONNTRACK_TCP_BE_LIBERAL,
|
|
.procname = "ip_conntrack_tcp_be_liberal",
|
|
.data = &ip_ct_tcp_be_liberal,
|
|
.maxlen = sizeof(unsigned int),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dointvec,
|
|
},
|
|
{
|
|
.ctl_name = NET_IPV4_NF_CONNTRACK_TCP_MAX_RETRANS,
|
|
.procname = "ip_conntrack_tcp_max_retrans",
|
|
.data = &ip_ct_tcp_max_retrans,
|
|
.maxlen = sizeof(unsigned int),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dointvec,
|
|
},
|
|
{ .ctl_name = 0 }
|
|
};
|
|
|
|
#define NET_IP_CONNTRACK_MAX 2089
|
|
|
|
static ctl_table ip_ct_netfilter_table[] = {
|
|
{
|
|
.ctl_name = NET_IPV4_NETFILTER,
|
|
.procname = "netfilter",
|
|
.mode = 0555,
|
|
.child = ip_ct_sysctl_table,
|
|
},
|
|
{
|
|
.ctl_name = NET_IP_CONNTRACK_MAX,
|
|
.procname = "ip_conntrack_max",
|
|
.data = &ip_conntrack_max,
|
|
.maxlen = sizeof(int),
|
|
.mode = 0644,
|
|
.proc_handler = &proc_dointvec
|
|
},
|
|
{ .ctl_name = 0 }
|
|
};
|
|
|
|
static ctl_table ip_ct_ipv4_table[] = {
|
|
{
|
|
.ctl_name = NET_IPV4,
|
|
.procname = "ipv4",
|
|
.mode = 0555,
|
|
.child = ip_ct_netfilter_table,
|
|
},
|
|
{ .ctl_name = 0 }
|
|
};
|
|
|
|
static ctl_table ip_ct_net_table[] = {
|
|
{
|
|
.ctl_name = CTL_NET,
|
|
.procname = "net",
|
|
.mode = 0555,
|
|
.child = ip_ct_ipv4_table,
|
|
},
|
|
{ .ctl_name = 0 }
|
|
};
|
|
|
|
EXPORT_SYMBOL(ip_ct_log_invalid);
|
|
#endif /* CONFIG_SYSCTL */
|
|
|
|
/* FIXME: Allow NULL functions and sub in pointers to generic for
|
|
them. --RR */
|
|
int ip_conntrack_protocol_register(struct ip_conntrack_protocol *proto)
|
|
{
|
|
int ret = 0;
|
|
|
|
write_lock_bh(&ip_conntrack_lock);
|
|
if (ip_ct_protos[proto->proto] != &ip_conntrack_generic_protocol) {
|
|
ret = -EBUSY;
|
|
goto out;
|
|
}
|
|
ip_ct_protos[proto->proto] = proto;
|
|
out:
|
|
write_unlock_bh(&ip_conntrack_lock);
|
|
return ret;
|
|
}
|
|
|
|
void ip_conntrack_protocol_unregister(struct ip_conntrack_protocol *proto)
|
|
{
|
|
write_lock_bh(&ip_conntrack_lock);
|
|
ip_ct_protos[proto->proto] = &ip_conntrack_generic_protocol;
|
|
write_unlock_bh(&ip_conntrack_lock);
|
|
|
|
/* Somebody could be still looking at the proto in bh. */
|
|
synchronize_net();
|
|
|
|
/* Remove all contrack entries for this protocol */
|
|
ip_ct_iterate_cleanup(kill_proto, &proto->proto);
|
|
}
|
|
|
|
static int __init ip_conntrack_standalone_init(void)
|
|
{
|
|
#ifdef CONFIG_PROC_FS
|
|
struct proc_dir_entry *proc, *proc_exp, *proc_stat;
|
|
#endif
|
|
int ret = 0;
|
|
|
|
ret = ip_conntrack_init();
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
#ifdef CONFIG_PROC_FS
|
|
ret = -ENOMEM;
|
|
proc = proc_net_fops_create("ip_conntrack", 0440, &ct_file_ops);
|
|
if (!proc) goto cleanup_init;
|
|
|
|
proc_exp = proc_net_fops_create("ip_conntrack_expect", 0440,
|
|
&exp_file_ops);
|
|
if (!proc_exp) goto cleanup_proc;
|
|
|
|
proc_stat = create_proc_entry("ip_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
|
|
|
|
ret = nf_register_hooks(ip_conntrack_ops, ARRAY_SIZE(ip_conntrack_ops));
|
|
if (ret < 0) {
|
|
printk("ip_conntrack: can't register hooks.\n");
|
|
goto cleanup_proc_stat;
|
|
}
|
|
#ifdef CONFIG_SYSCTL
|
|
ip_ct_sysctl_header = register_sysctl_table(ip_ct_net_table, 0);
|
|
if (ip_ct_sysctl_header == NULL) {
|
|
printk("ip_conntrack: can't register to sysctl.\n");
|
|
ret = -ENOMEM;
|
|
goto cleanup_hooks;
|
|
}
|
|
#endif
|
|
return ret;
|
|
|
|
#ifdef CONFIG_SYSCTL
|
|
cleanup_hooks:
|
|
nf_unregister_hooks(ip_conntrack_ops, ARRAY_SIZE(ip_conntrack_ops));
|
|
#endif
|
|
cleanup_proc_stat:
|
|
#ifdef CONFIG_PROC_FS
|
|
remove_proc_entry("ip_conntrack", proc_net_stat);
|
|
cleanup_proc_exp:
|
|
proc_net_remove("ip_conntrack_expect");
|
|
cleanup_proc:
|
|
proc_net_remove("ip_conntrack");
|
|
cleanup_init:
|
|
#endif /* CONFIG_PROC_FS */
|
|
ip_conntrack_cleanup();
|
|
return ret;
|
|
}
|
|
|
|
static void __exit ip_conntrack_standalone_fini(void)
|
|
{
|
|
synchronize_net();
|
|
#ifdef CONFIG_SYSCTL
|
|
unregister_sysctl_table(ip_ct_sysctl_header);
|
|
#endif
|
|
nf_unregister_hooks(ip_conntrack_ops, ARRAY_SIZE(ip_conntrack_ops));
|
|
#ifdef CONFIG_PROC_FS
|
|
remove_proc_entry("ip_conntrack", proc_net_stat);
|
|
proc_net_remove("ip_conntrack_expect");
|
|
proc_net_remove("ip_conntrack");
|
|
#endif /* CONFIG_PROC_FS */
|
|
ip_conntrack_cleanup();
|
|
}
|
|
|
|
module_init(ip_conntrack_standalone_init);
|
|
module_exit(ip_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_IP_NF_CONNTRACK_EVENTS
|
|
EXPORT_SYMBOL_GPL(ip_conntrack_chain);
|
|
EXPORT_SYMBOL_GPL(ip_conntrack_expect_chain);
|
|
EXPORT_SYMBOL_GPL(ip_conntrack_register_notifier);
|
|
EXPORT_SYMBOL_GPL(ip_conntrack_unregister_notifier);
|
|
EXPORT_SYMBOL_GPL(__ip_ct_event_cache_init);
|
|
EXPORT_PER_CPU_SYMBOL_GPL(ip_conntrack_ecache);
|
|
#endif
|
|
EXPORT_SYMBOL(ip_conntrack_protocol_register);
|
|
EXPORT_SYMBOL(ip_conntrack_protocol_unregister);
|
|
EXPORT_SYMBOL(ip_ct_get_tuple);
|
|
EXPORT_SYMBOL(invert_tuplepr);
|
|
EXPORT_SYMBOL(ip_conntrack_alter_reply);
|
|
EXPORT_SYMBOL(ip_conntrack_destroyed);
|
|
EXPORT_SYMBOL(need_conntrack);
|
|
EXPORT_SYMBOL(ip_conntrack_helper_register);
|
|
EXPORT_SYMBOL(ip_conntrack_helper_unregister);
|
|
EXPORT_SYMBOL(ip_ct_iterate_cleanup);
|
|
EXPORT_SYMBOL(__ip_ct_refresh_acct);
|
|
|
|
EXPORT_SYMBOL(ip_conntrack_expect_alloc);
|
|
EXPORT_SYMBOL(ip_conntrack_expect_put);
|
|
EXPORT_SYMBOL_GPL(__ip_conntrack_expect_find);
|
|
EXPORT_SYMBOL_GPL(ip_conntrack_expect_find);
|
|
EXPORT_SYMBOL(ip_conntrack_expect_related);
|
|
EXPORT_SYMBOL(ip_conntrack_unexpect_related);
|
|
EXPORT_SYMBOL_GPL(ip_conntrack_expect_list);
|
|
EXPORT_SYMBOL_GPL(ip_ct_unlink_expect);
|
|
|
|
EXPORT_SYMBOL(ip_conntrack_tuple_taken);
|
|
EXPORT_SYMBOL(ip_ct_gather_frags);
|
|
EXPORT_SYMBOL(ip_conntrack_htable_size);
|
|
EXPORT_SYMBOL(ip_conntrack_lock);
|
|
EXPORT_SYMBOL(ip_conntrack_hash);
|
|
EXPORT_SYMBOL(ip_conntrack_untracked);
|
|
EXPORT_SYMBOL_GPL(ip_conntrack_find_get);
|
|
#ifdef CONFIG_IP_NF_NAT_NEEDED
|
|
EXPORT_SYMBOL(ip_conntrack_tcp_update);
|
|
#endif
|
|
|
|
EXPORT_SYMBOL_GPL(ip_conntrack_flush);
|
|
EXPORT_SYMBOL_GPL(__ip_conntrack_find);
|
|
|
|
EXPORT_SYMBOL_GPL(ip_conntrack_alloc);
|
|
EXPORT_SYMBOL_GPL(ip_conntrack_free);
|
|
EXPORT_SYMBOL_GPL(ip_conntrack_hash_insert);
|
|
|
|
EXPORT_SYMBOL_GPL(ip_ct_remove_expectations);
|
|
|
|
EXPORT_SYMBOL_GPL(ip_conntrack_helper_find_get);
|
|
EXPORT_SYMBOL_GPL(ip_conntrack_helper_put);
|
|
EXPORT_SYMBOL_GPL(__ip_conntrack_helper_find_byname);
|
|
|
|
EXPORT_SYMBOL_GPL(ip_conntrack_proto_find_get);
|
|
EXPORT_SYMBOL_GPL(ip_conntrack_proto_put);
|
|
EXPORT_SYMBOL_GPL(__ip_conntrack_proto_find);
|
|
EXPORT_SYMBOL_GPL(ip_conntrack_checksum);
|
|
#if defined(CONFIG_IP_NF_CONNTRACK_NETLINK) || \
|
|
defined(CONFIG_IP_NF_CONNTRACK_NETLINK_MODULE)
|
|
EXPORT_SYMBOL_GPL(ip_ct_port_tuple_to_nfattr);
|
|
EXPORT_SYMBOL_GPL(ip_ct_port_nfattr_to_tuple);
|
|
#endif
|