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Diffstat (limited to 'net/ipv4/netfilter/ip_conntrack_standalone.c')
-rw-r--r--net/ipv4/netfilter/ip_conntrack_standalone.c961
1 files changed, 961 insertions, 0 deletions
diff --git a/net/ipv4/netfilter/ip_conntrack_standalone.c b/net/ipv4/netfilter/ip_conntrack_standalone.c
new file mode 100644
index 00000000000..80a7bde2a57
--- /dev/null
+++ b/net/ipv4/netfilter/ip_conntrack_standalone.c
@@ -0,0 +1,961 @@
+/* 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) 2002-2004 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.
+ */
+
+#include <linux/config.h>
+#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>
+
+#define ASSERT_READ_LOCK(x) MUST_BE_READ_LOCKED(&ip_conntrack_lock)
+#define ASSERT_WRITE_LOCK(x) MUST_BE_WRITE_LOCKED(&ip_conntrack_lock)
+
+#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>
+#include <linux/netfilter_ipv4/listhelp.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(&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(&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;
+
+ MUST_BE_READ_LOCKED(&ip_conntrack_lock);
+ IP_NF_ASSERT(conntrack);
+
+ /* we only want to print DIR_ORIGINAL */
+ if (DIRECTION(hash))
+ return 0;
+
+ proto = ip_ct_find_proto(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=%lu ", conntrack->mark))
+ 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,
+};
+
+/* 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(&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;
+
+ 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(&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_ct_find_proto(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 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 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 *))
+{
+ 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) {
+ unsigned int ret;
+ ret = ct->helper->help(pskb, ct, ctinfo);
+ if (ret != NF_ACCEPT)
+ return ret;
+ }
+
+ /* We've seen it coming out the other side: confirm it */
+ return ip_conntrack_confirm(pskb);
+}
+
+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_refrag(unsigned int hooknum,
+ struct sk_buff **pskb,
+ const struct net_device *in,
+ const struct net_device *out,
+ int (*okfn)(struct sk_buff *))
+{
+ struct rtable *rt = (struct rtable *)(*pskb)->dst;
+
+ /* We've seen it coming out the other side: confirm */
+ if (ip_confirm(hooknum, pskb, in, out, okfn) != NF_ACCEPT)
+ return NF_DROP;
+
+ /* Local packets are never produced too large for their
+ interface. We degfragment them at LOCAL_OUT, however,
+ so we have to refragment them here. */
+ if ((*pskb)->len > dst_mtu(&rt->u.dst) &&
+ !skb_shinfo(*pskb)->tso_size) {
+ /* No hook can be after us, so this should be OK. */
+ ip_fragment(*pskb, okfn);
+ 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_defrag_ops = {
+ .hook = ip_conntrack_defrag,
+ .owner = THIS_MODULE,
+ .pf = PF_INET,
+ .hooknum = NF_IP_PRE_ROUTING,
+ .priority = NF_IP_PRI_CONNTRACK_DEFRAG,
+};
+
+static struct nf_hook_ops ip_conntrack_in_ops = {
+ .hook = ip_conntrack_in,
+ .owner = THIS_MODULE,
+ .pf = PF_INET,
+ .hooknum = NF_IP_PRE_ROUTING,
+ .priority = NF_IP_PRI_CONNTRACK,
+};
+
+static struct nf_hook_ops ip_conntrack_defrag_local_out_ops = {
+ .hook = ip_conntrack_defrag,
+ .owner = THIS_MODULE,
+ .pf = PF_INET,
+ .hooknum = NF_IP_LOCAL_OUT,
+ .priority = NF_IP_PRI_CONNTRACK_DEFRAG,
+};
+
+static struct nf_hook_ops ip_conntrack_local_out_ops = {
+ .hook = ip_conntrack_local,
+ .owner = THIS_MODULE,
+ .pf = PF_INET,
+ .hooknum = NF_IP_LOCAL_OUT,
+ .priority = NF_IP_PRI_CONNTRACK,
+};
+
+/* Refragmenter; last chance. */
+static struct nf_hook_ops ip_conntrack_out_ops = {
+ .hook = ip_refrag,
+ .owner = THIS_MODULE,
+ .pf = PF_INET,
+ .hooknum = NF_IP_POST_ROUTING,
+ .priority = NF_IP_PRI_LAST,
+};
+
+static struct nf_hook_ops ip_conntrack_local_in_ops = {
+ .hook = ip_confirm,
+ .owner = THIS_MODULE,
+ .pf = PF_INET,
+ .hooknum = NF_IP_LOCAL_IN,
+ .priority = NF_IP_PRI_LAST-1,
+};
+
+/* Sysctl support */
+
+#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 long ip_ct_tcp_timeout_syn_sent;
+extern unsigned long ip_ct_tcp_timeout_syn_recv;
+extern unsigned long ip_ct_tcp_timeout_established;
+extern unsigned long ip_ct_tcp_timeout_fin_wait;
+extern unsigned long ip_ct_tcp_timeout_close_wait;
+extern unsigned long ip_ct_tcp_timeout_last_ack;
+extern unsigned long ip_ct_tcp_timeout_time_wait;
+extern unsigned long ip_ct_tcp_timeout_close;
+extern unsigned long 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 long ip_ct_udp_timeout;
+extern unsigned long ip_ct_udp_timeout_stream;
+
+/* From ip_conntrack_proto_icmp.c */
+extern unsigned long ip_ct_icmp_timeout;
+
+/* From ip_conntrack_proto_icmp.c */
+extern unsigned long 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_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 */
+
+static int init_or_cleanup(int init)
+{
+#ifdef CONFIG_PROC_FS
+ struct proc_dir_entry *proc, *proc_exp, *proc_stat;
+#endif
+ int ret = 0;
+
+ if (!init) goto cleanup;
+
+ ret = ip_conntrack_init();
+ if (ret < 0)
+ goto cleanup_nothing;
+
+#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_hook(&ip_conntrack_defrag_ops);
+ if (ret < 0) {
+ printk("ip_conntrack: can't register pre-routing defrag hook.\n");
+ goto cleanup_proc_stat;
+ }
+ ret = nf_register_hook(&ip_conntrack_defrag_local_out_ops);
+ if (ret < 0) {
+ printk("ip_conntrack: can't register local_out defrag hook.\n");
+ goto cleanup_defragops;
+ }
+ ret = nf_register_hook(&ip_conntrack_in_ops);
+ if (ret < 0) {
+ printk("ip_conntrack: can't register pre-routing hook.\n");
+ goto cleanup_defraglocalops;
+ }
+ ret = nf_register_hook(&ip_conntrack_local_out_ops);
+ if (ret < 0) {
+ printk("ip_conntrack: can't register local out hook.\n");
+ goto cleanup_inops;
+ }
+ ret = nf_register_hook(&ip_conntrack_out_ops);
+ if (ret < 0) {
+ printk("ip_conntrack: can't register post-routing hook.\n");
+ goto cleanup_inandlocalops;
+ }
+ ret = nf_register_hook(&ip_conntrack_local_in_ops);
+ if (ret < 0) {
+ printk("ip_conntrack: can't register local in hook.\n");
+ goto cleanup_inoutandlocalops;
+ }
+#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_localinops;
+ }
+#endif
+
+ return ret;
+
+ cleanup:
+#ifdef CONFIG_SYSCTL
+ unregister_sysctl_table(ip_ct_sysctl_header);
+ cleanup_localinops:
+#endif
+ nf_unregister_hook(&ip_conntrack_local_in_ops);
+ cleanup_inoutandlocalops:
+ nf_unregister_hook(&ip_conntrack_out_ops);
+ cleanup_inandlocalops:
+ nf_unregister_hook(&ip_conntrack_local_out_ops);
+ cleanup_inops:
+ nf_unregister_hook(&ip_conntrack_in_ops);
+ cleanup_defraglocalops:
+ nf_unregister_hook(&ip_conntrack_defrag_local_out_ops);
+ cleanup_defragops:
+ nf_unregister_hook(&ip_conntrack_defrag_ops);
+ 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();
+ cleanup_nothing:
+ return ret;
+}
+
+/* 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(&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(&ip_conntrack_lock);
+ return ret;
+}
+
+void ip_conntrack_protocol_unregister(struct ip_conntrack_protocol *proto)
+{
+ WRITE_LOCK(&ip_conntrack_lock);
+ ip_ct_protos[proto->proto] = &ip_conntrack_generic_protocol;
+ WRITE_UNLOCK(&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 init(void)
+{
+ return init_or_cleanup(1);
+}
+
+static void __exit fini(void)
+{
+ init_or_cleanup(0);
+}
+
+module_init(init);
+module_exit(fini);
+
+/* Some modules need us, but don't depend directly on any symbol.
+ They should call this. */
+void need_ip_conntrack(void)
+{
+}
+
+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_ip_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_ct_protos);
+EXPORT_SYMBOL(ip_ct_find_proto);
+EXPORT_SYMBOL(ip_conntrack_expect_alloc);
+EXPORT_SYMBOL(ip_conntrack_expect_free);
+EXPORT_SYMBOL(ip_conntrack_expect_related);
+EXPORT_SYMBOL(ip_conntrack_unexpect_related);
+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);
+EXPORT_SYMBOL_GPL(ip_conntrack_put);
+#ifdef CONFIG_IP_NF_NAT_NEEDED
+EXPORT_SYMBOL(ip_conntrack_tcp_update);
+#endif
generated by cgit v1.2.3 (git 2.39.1) at 2024-04-20 04:47:59 +0000