| /* 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> |
| |
| #define ASSERT_READ_LOCK(x) |
| #define ASSERT_WRITE_LOCK(x) |
| |
| #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; |
| |
| ASSERT_READ_LOCK(&ip_conntrack_lock); |
| 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 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 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 *)) |
| { |
| /* 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; |
| } |
| 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 |
