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- /* This file contains all the functions required for the standalone
- ip_conntrack module.
- These are not required by the compatibility layer.
- */
- /* (C) 1999-2001 Paul `Rusty' Russell
- * (C) 2002-2005 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.
- */
- #include <linux/types.h>
- #include <linux/ip.h>
- #include <linux/netfilter.h>
- #include <linux/netfilter_ipv4.h>
- #include <linux/module.h>
- #include <linux/skbuff.h>
- #include <linux/proc_fs.h>
- #include <linux/seq_file.h>
- #include <linux/percpu.h>
- #ifdef CONFIG_SYSCTL
- #include <linux/sysctl.h>
- #endif
- #include <net/checksum.h>
- #include <net/ip.h>
- #include <net/route.h>
- #include <linux/netfilter_ipv4/ip_conntrack.h>
- #include <linux/netfilter_ipv4/ip_conntrack_protocol.h>
- #include <linux/netfilter_ipv4/ip_conntrack_core.h>
- #include <linux/netfilter_ipv4/ip_conntrack_helper.h>
- #if 0
- #define DEBUGP printk
- #else
- #define DEBUGP(format, args...)
- #endif
- MODULE_LICENSE("GPL");
- extern atomic_t ip_conntrack_count;
- DECLARE_PER_CPU(struct ip_conntrack_stat, ip_conntrack_stat);
- static int kill_proto(struct ip_conntrack *i, void *data)
- {
- return (i->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.protonum ==
- *((u_int8_t *) data));
- }
- #ifdef CONFIG_PROC_FS
- static int
- print_tuple(struct seq_file *s, const struct ip_conntrack_tuple *tuple,
- struct ip_conntrack_protocol *proto)
- {
- seq_printf(s, "src=%u.%u.%u.%u dst=%u.%u.%u.%u ",
- NIPQUAD(tuple->src.ip), NIPQUAD(tuple->dst.ip));
- return proto->print_tuple(s, tuple);
- }
- #ifdef CONFIG_IP_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 < ip_conntrack_htable_size;
- st->bucket++) {
- if (!list_empty(&ip_conntrack_hash[st->bucket]))
- return ip_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 == &ip_conntrack_hash[st->bucket]) {
- if (++st->bucket >= ip_conntrack_htable_size)
- return NULL;
- head = ip_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(&ip_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(&ip_conntrack_lock);
- }
- static int ct_seq_show(struct seq_file *s, void *v)
- {
- const struct ip_conntrack_tuple_hash *hash = v;
- const struct ip_conntrack *conntrack = tuplehash_to_ctrack(hash);
- struct ip_conntrack_protocol *proto;
- IP_NF_ASSERT(conntrack);
- /* we only want to print DIR_ORIGINAL */
- if (DIRECTION(hash))
- return 0;
- proto = __ip_conntrack_proto_find(conntrack->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.protonum);
- IP_NF_ASSERT(proto);
- if (seq_printf(s, "%-8s %u %ld ",
- proto->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 (proto->print_conntrack(s, conntrack))
- return -ENOSPC;
- if (print_tuple(s, &conntrack->tuplehash[IP_CT_DIR_ORIGINAL].tuple,
- proto))
- 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,
- proto))
- 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_IP_NF_CONNTRACK_MARK)
- if (seq_printf(s, "mark=%u ", conntrack->mark))
- return -ENOSPC;
- #endif
- #ifdef CONFIG_IP_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 const struct file_operations ct_file_ops = {
- .owner = THIS_MODULE,
- .open = ct_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = seq_release_private,
- };
- /* expects */
- static void *exp_seq_start(struct seq_file *s, loff_t *pos)
- {
- struct list_head *e = &ip_conntrack_expect_list;
- loff_t i;
- /* strange seq_file api calls stop even if we fail,
- * thus we need to grab lock since stop unlocks */
- read_lock_bh(&ip_conntrack_lock);
- if (list_empty(e))
- return NULL;
- for (i = 0; i <= *pos; i++) {
- e = e->next;
- if (e == &ip_conntrack_expect_list)
- return NULL;
- }
- return e;
- }
- static void *exp_seq_next(struct seq_file *s, void *v, loff_t *pos)
- {
- struct list_head *e = v;
- ++*pos;
- e = e->next;
- if (e == &ip_conntrack_expect_list)
- return NULL;
- return e;
- }
- static void exp_seq_stop(struct seq_file *s, void *v)
- {
- read_unlock_bh(&ip_conntrack_lock);
- }
- static int exp_seq_show(struct seq_file *s, void *v)
- {
- struct ip_conntrack_expect *expect = v;
- if (expect->timeout.function)
- seq_printf(s, "%ld ", timer_pending(&expect->timeout)
- ? (long)(expect->timeout.expires - jiffies)/HZ : 0);
- else
- seq_printf(s, "- ");
- seq_printf(s, "proto=%u ", expect->tuple.dst.protonum);
- print_tuple(s, &expect->tuple,
- __ip_conntrack_proto_find(expect->tuple.dst.protonum));
- return seq_putc(s, '\n');
- }
- static struct seq_operations exp_seq_ops = {
- .start = exp_seq_start,
- .next = exp_seq_next,
- .stop = exp_seq_stop,
- .show = exp_seq_show
- };
- static int exp_open(struct inode *inode, struct file *file)
- {
- return seq_open(file, &exp_seq_ops);
- }
- static const struct file_operations exp_file_ops = {
- .owner = THIS_MODULE,
- .open = exp_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = seq_release
- };
- 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(ip_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(ip_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(&ip_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 const 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
- static unsigned int ip_confirm(unsigned int hooknum,
- struct sk_buff **pskb,
- const struct net_device *in,
- const struct net_device *out,
- int (*okfn)(struct sk_buff *))
- {
- /* We've seen it coming out the other side: confirm it */
- return ip_conntrack_confirm(pskb);
- }
- static unsigned int ip_conntrack_help(unsigned int hooknum,
- struct sk_buff **pskb,
- const struct net_device *in,
- const struct net_device *out,
- int (*okfn)(struct sk_buff *))
- {
- struct ip_conntrack *ct;
- enum ip_conntrack_info ctinfo;
- /* This is where we call the helper: as the packet goes out. */
- ct = ip_conntrack_get(*pskb, &ctinfo);
- if (ct && ct->helper && ctinfo != IP_CT_RELATED + IP_CT_IS_REPLY) {
- unsigned int ret;
- ret = ct->helper->help(pskb, ct, ctinfo);
- if (ret != NF_ACCEPT)
- return ret;
- }
- return NF_ACCEPT;
- }
- static unsigned int ip_conntrack_defrag(unsigned int hooknum,
- struct sk_buff **pskb,
- const struct net_device *in,
- const struct net_device *out,
- int (*okfn)(struct sk_buff *))
- {
- #if !defined(CONFIG_IP_NF_NAT) && !defined(CONFIG_IP_NF_NAT_MODULE)
- /* Previously seen (loopback)? Ignore. Do this before
- fragment check. */
- if ((*pskb)->nfct)
- return NF_ACCEPT;
- #endif
- /* Gather fragments. */
- if ((*pskb)->nh.iph->frag_off & htons(IP_MF|IP_OFFSET)) {
- *pskb = ip_ct_gather_frags(*pskb,
- hooknum == NF_IP_PRE_ROUTING ?
- IP_DEFRAG_CONNTRACK_IN :
- IP_DEFRAG_CONNTRACK_OUT);
- if (!*pskb)
- return NF_STOLEN;
- }
- return NF_ACCEPT;
- }
- static unsigned int ip_conntrack_local(unsigned int hooknum,
- struct sk_buff **pskb,
- const struct net_device *in,
- const struct net_device *out,
- int (*okfn)(struct sk_buff *))
- {
- /* root is playing with raw sockets. */
- if ((*pskb)->len < sizeof(struct iphdr)
- || (*pskb)->nh.iph->ihl * 4 < sizeof(struct iphdr)) {
- if (net_ratelimit())
- printk("ipt_hook: happy cracking.\n");
- return NF_ACCEPT;
- }
- return ip_conntrack_in(hooknum, pskb, in, out, okfn);
- }
- /* Connection tracking may drop packets, but never alters them, so
- make it the first hook. */
- static struct nf_hook_ops ip_conntrack_ops[] = {
- {
- .hook = ip_conntrack_defrag,
- .owner = THIS_MODULE,
- .pf = PF_INET,
- .hooknum = NF_IP_PRE_ROUTING,
- .priority = NF_IP_PRI_CONNTRACK_DEFRAG,
- },
- {
- .hook = ip_conntrack_in,
- .owner = THIS_MODULE,
- .pf = PF_INET,
- .hooknum = NF_IP_PRE_ROUTING,
- .priority = NF_IP_PRI_CONNTRACK,
- },
- {
- .hook = ip_conntrack_defrag,
- .owner = THIS_MODULE,
- .pf = PF_INET,
- .hooknum = NF_IP_LOCAL_OUT,
- .priority = NF_IP_PRI_CONNTRACK_DEFRAG,
- },
- {
- .hook = ip_conntrack_local,
- .owner = THIS_MODULE,
- .pf = PF_INET,
- .hooknum = NF_IP_LOCAL_OUT,
- .priority = NF_IP_PRI_CONNTRACK,
- },
- {
- .hook = ip_conntrack_help,
- .owner = THIS_MODULE,
- .pf = PF_INET,
- .hooknum = NF_IP_POST_ROUTING,
- .priority = NF_IP_PRI_CONNTRACK_HELPER,
- },
- {
- .hook = ip_conntrack_help,
- .owner = THIS_MODULE,
- .pf = PF_INET,
- .hooknum = NF_IP_LOCAL_IN,
- .priority = NF_IP_PRI_CONNTRACK_HELPER,
- },
- {
- .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;
- }
- rcu_assign_pointer(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);
- rcu_assign_pointer(ip_ct_protos[proto->proto],
- &ip_conntrack_generic_protocol);
- write_unlock_bh(&ip_conntrack_lock);
- synchronize_rcu();
- /* 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);
- 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_get);
- 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
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