| /* (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/types.h> |
| #include <linux/netfilter.h> |
| #include <linux/module.h> |
| #include <linux/skbuff.h> |
| #include <linux/proc_fs.h> |
| #include <linux/seq_file.h> |
| #include <linux/percpu.h> |
| #include <linux/netdevice.h> |
| #include <net/net_namespace.h> |
| #ifdef CONFIG_SYSCTL |
| #include <linux/sysctl.h> |
| #endif |
| |
| #include <net/netfilter/nf_conntrack.h> |
| #include <net/netfilter/nf_conntrack_core.h> |
| #include <net/netfilter/nf_conntrack_l3proto.h> |
| #include <net/netfilter/nf_conntrack_l4proto.h> |
| #include <net/netfilter/nf_conntrack_expect.h> |
| #include <net/netfilter/nf_conntrack_helper.h> |
| |
| MODULE_LICENSE("GPL"); |
| |
| #ifdef CONFIG_PROC_FS |
| int |
| print_tuple(struct seq_file *s, const struct nf_conntrack_tuple *tuple, |
| struct nf_conntrack_l3proto *l3proto, |
| struct nf_conntrack_l4proto *l4proto) |
| { |
| return l3proto->print_tuple(s, tuple) || l4proto->print_tuple(s, tuple); |
| } |
| EXPORT_SYMBOL_GPL(print_tuple); |
| |
| #ifdef CONFIG_NF_CT_ACCT |
| static unsigned int |
| seq_print_counters(struct seq_file *s, |
| const struct ip_conntrack_counter *counter) |
| { |
| return seq_printf(s, "packets=%llu bytes=%llu ", |
| (unsigned long long)counter->packets, |
| (unsigned long long)counter->bytes); |
| } |
| #else |
| #define seq_print_counters(x, y) 0 |
| #endif |
| |
| struct ct_iter_state { |
| unsigned int bucket; |
| }; |
| |
| static struct hlist_node *ct_get_first(struct seq_file *seq) |
| { |
| struct ct_iter_state *st = seq->private; |
| |
| for (st->bucket = 0; |
| st->bucket < nf_conntrack_htable_size; |
| st->bucket++) { |
| if (!hlist_empty(&nf_conntrack_hash[st->bucket])) |
| return nf_conntrack_hash[st->bucket].first; |
| } |
| return NULL; |
| } |
| |
| static struct hlist_node *ct_get_next(struct seq_file *seq, |
| struct hlist_node *head) |
| { |
| struct ct_iter_state *st = seq->private; |
| |
| head = head->next; |
| while (head == NULL) { |
| if (++st->bucket >= nf_conntrack_htable_size) |
| return NULL; |
| head = nf_conntrack_hash[st->bucket].first; |
| } |
| return head; |
| } |
| |
| static struct hlist_node *ct_get_idx(struct seq_file *seq, loff_t pos) |
| { |
| struct hlist_node *head = ct_get_first(seq); |
| |
| if (head) |
| while (pos && (head = ct_get_next(seq, head))) |
| pos--; |
| return pos ? NULL : head; |
| } |
| |
| static void *ct_seq_start(struct seq_file *seq, loff_t *pos) |
| { |
| read_lock_bh(&nf_conntrack_lock); |
| return ct_get_idx(seq, *pos); |
| } |
| |
| static void *ct_seq_next(struct seq_file *s, void *v, loff_t *pos) |
| { |
| (*pos)++; |
| return ct_get_next(s, v); |
| } |
| |
| static void ct_seq_stop(struct seq_file *s, void *v) |
| { |
| read_unlock_bh(&nf_conntrack_lock); |
| } |
| |
| /* return 0 on success, 1 in case of error */ |
| static int ct_seq_show(struct seq_file *s, void *v) |
| { |
| const struct nf_conntrack_tuple_hash *hash = v; |
| const struct nf_conn *conntrack = nf_ct_tuplehash_to_ctrack(hash); |
| struct nf_conntrack_l3proto *l3proto; |
| struct nf_conntrack_l4proto *l4proto; |
| |
| NF_CT_ASSERT(conntrack); |
| |
| /* we only want to print DIR_ORIGINAL */ |
| if (NF_CT_DIRECTION(hash)) |
| return 0; |
| |
| l3proto = __nf_ct_l3proto_find(conntrack->tuplehash[IP_CT_DIR_ORIGINAL] |
| .tuple.src.l3num); |
| |
| NF_CT_ASSERT(l3proto); |
| l4proto = __nf_ct_l4proto_find(conntrack->tuplehash[IP_CT_DIR_ORIGINAL] |
| .tuple.src.l3num, |
| conntrack->tuplehash[IP_CT_DIR_ORIGINAL] |
| .tuple.dst.protonum); |
| NF_CT_ASSERT(l4proto); |
| |
| if (seq_printf(s, "%-8s %u %-8s %u %ld ", |
| l3proto->name, |
| conntrack->tuplehash[IP_CT_DIR_ORIGINAL].tuple.src.l3num, |
| l4proto->name, |
| conntrack->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.protonum, |
| timer_pending(&conntrack->timeout) |
| ? (long)(conntrack->timeout.expires - jiffies)/HZ : 0) != 0) |
| return -ENOSPC; |
| |
| if (l3proto->print_conntrack(s, conntrack)) |
| return -ENOSPC; |
| |
| if (l4proto->print_conntrack(s, conntrack)) |
| return -ENOSPC; |
| |
| if (print_tuple(s, &conntrack->tuplehash[IP_CT_DIR_ORIGINAL].tuple, |
| l3proto, l4proto)) |
| return -ENOSPC; |
| |
| if (seq_print_counters(s, &conntrack->counters[IP_CT_DIR_ORIGINAL])) |
| return -ENOSPC; |
| |
| if (!(test_bit(IPS_SEEN_REPLY_BIT, &conntrack->status))) |
| if (seq_printf(s, "[UNREPLIED] ")) |
| return -ENOSPC; |
| |
| if (print_tuple(s, &conntrack->tuplehash[IP_CT_DIR_REPLY].tuple, |
| l3proto, l4proto)) |
| return -ENOSPC; |
| |
| if (seq_print_counters(s, &conntrack->counters[IP_CT_DIR_REPLY])) |
| return -ENOSPC; |
| |
| if (test_bit(IPS_ASSURED_BIT, &conntrack->status)) |
| if (seq_printf(s, "[ASSURED] ")) |
| return -ENOSPC; |
| |
| #if defined(CONFIG_NF_CONNTRACK_MARK) |
| if (seq_printf(s, "mark=%u ", conntrack->mark)) |
| return -ENOSPC; |
| #endif |
| |
| #ifdef CONFIG_NF_CONNTRACK_SECMARK |
| if (seq_printf(s, "secmark=%u ", conntrack->secmark)) |
| return -ENOSPC; |
| #endif |
| |
| if (seq_printf(s, "use=%u\n", atomic_read(&conntrack->ct_general.use))) |
| return -ENOSPC; |
| |
| return 0; |
| } |
| |
| static const 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) |
| { |
| return seq_open_private(file, &ct_seq_ops, |
| sizeof(struct ct_iter_state)); |
| } |
| |
| static const struct file_operations ct_file_ops = { |
| .owner = THIS_MODULE, |
| .open = ct_open, |
| .read = seq_read, |
| .llseek = seq_lseek, |
| .release = seq_release_private, |
| }; |
| |
| static void *ct_cpu_seq_start(struct seq_file *seq, loff_t *pos) |
| { |
| int cpu; |
| |
| if (*pos == 0) |
| return SEQ_START_TOKEN; |
| |
| for (cpu = *pos-1; cpu < NR_CPUS; ++cpu) { |
| if (!cpu_possible(cpu)) |
| continue; |
| *pos = cpu + 1; |
| return &per_cpu(nf_conntrack_stat, cpu); |
| } |
| |
| return NULL; |
| } |
| |
| static void *ct_cpu_seq_next(struct seq_file *seq, void *v, loff_t *pos) |
| { |
| int cpu; |
| |
| for (cpu = *pos; cpu < NR_CPUS; ++cpu) { |
| if (!cpu_possible(cpu)) |
| continue; |
| *pos = cpu + 1; |
| return &per_cpu(nf_conntrack_stat, cpu); |
| } |
| |
| return NULL; |
| } |
| |
| static void ct_cpu_seq_stop(struct seq_file *seq, void *v) |
| { |
| } |
| |
| static int ct_cpu_seq_show(struct seq_file *seq, void *v) |
| { |
| unsigned int nr_conntracks = atomic_read(&nf_conntrack_count); |
| struct ip_conntrack_stat *st = v; |
| |
| if (v == SEQ_START_TOKEN) { |
| seq_printf(seq, "entries searched found new invalid ignore delete delete_list insert insert_failed drop early_drop icmp_error expect_new expect_create expect_delete\n"); |
| return 0; |
| } |
| |
| seq_printf(seq, "%08x %08x %08x %08x %08x %08x %08x %08x " |
| "%08x %08x %08x %08x %08x %08x %08x %08x \n", |
| nr_conntracks, |
| st->searched, |
| st->found, |
| st->new, |
| st->invalid, |
| st->ignore, |
| st->delete, |
| st->delete_list, |
| st->insert, |
| st->insert_failed, |
| st->drop, |
| st->early_drop, |
| st->error, |
| |
| st->expect_new, |
| st->expect_create, |
| st->expect_delete |
| ); |
| return 0; |
| } |
| |
| static const 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 /* CONFIG_PROC_FS */ |
| |
| /* Sysctl support */ |
| |
| int nf_conntrack_checksum __read_mostly = 1; |
| EXPORT_SYMBOL_GPL(nf_conntrack_checksum); |
| |
| #ifdef CONFIG_SYSCTL |
| /* Log invalid packets of a given protocol */ |
| static int log_invalid_proto_min = 0; |
| static int log_invalid_proto_max = 255; |
| |
| static struct ctl_table_header *nf_ct_sysctl_header; |
| |
| static ctl_table nf_ct_sysctl_table[] = { |
| { |
| .ctl_name = NET_NF_CONNTRACK_MAX, |
| .procname = "nf_conntrack_max", |
| .data = &nf_conntrack_max, |
| .maxlen = sizeof(int), |
| .mode = 0644, |
| .proc_handler = &proc_dointvec, |
| }, |
| { |
| .ctl_name = NET_NF_CONNTRACK_COUNT, |
| .procname = "nf_conntrack_count", |
| .data = &nf_conntrack_count, |
| .maxlen = sizeof(int), |
| .mode = 0444, |
| .proc_handler = &proc_dointvec, |
| }, |
| { |
| .ctl_name = NET_NF_CONNTRACK_BUCKETS, |
| .procname = "nf_conntrack_buckets", |
| .data = &nf_conntrack_htable_size, |
| .maxlen = sizeof(unsigned int), |
| .mode = 0444, |
| .proc_handler = &proc_dointvec, |
| }, |
| { |
| .ctl_name = NET_NF_CONNTRACK_CHECKSUM, |
| .procname = "nf_conntrack_checksum", |
| .data = &nf_conntrack_checksum, |
| .maxlen = sizeof(unsigned int), |
| .mode = 0644, |
| .proc_handler = &proc_dointvec, |
| }, |
| { |
| .ctl_name = NET_NF_CONNTRACK_LOG_INVALID, |
| .procname = "nf_conntrack_log_invalid", |
| .data = &nf_ct_log_invalid, |
| .maxlen = sizeof(unsigned int), |
| .mode = 0644, |
| .proc_handler = &proc_dointvec_minmax, |
| .strategy = &sysctl_intvec, |
| .extra1 = &log_invalid_proto_min, |
| .extra2 = &log_invalid_proto_max, |
| }, |
| { |
| .ctl_name = CTL_UNNUMBERED, |
| .procname = "nf_conntrack_expect_max", |
| .data = &nf_ct_expect_max, |
| .maxlen = sizeof(int), |
| .mode = 0644, |
| .proc_handler = &proc_dointvec, |
| }, |
| { .ctl_name = 0 } |
| }; |
| |
| #define NET_NF_CONNTRACK_MAX 2089 |
| |
| static ctl_table nf_ct_netfilter_table[] = { |
| { |
| .ctl_name = NET_NETFILTER, |
| .procname = "netfilter", |
| .mode = 0555, |
| .child = nf_ct_sysctl_table, |
| }, |
| { |
| .ctl_name = NET_NF_CONNTRACK_MAX, |
| .procname = "nf_conntrack_max", |
| .data = &nf_conntrack_max, |
| .maxlen = sizeof(int), |
| .mode = 0644, |
| .proc_handler = &proc_dointvec, |
| }, |
| { .ctl_name = 0 } |
| }; |
| |
| struct ctl_path nf_ct_path[] = { |
| { .procname = "net", .ctl_name = CTL_NET, }, |
| { } |
| }; |
| |
| EXPORT_SYMBOL_GPL(nf_ct_log_invalid); |
| #endif /* CONFIG_SYSCTL */ |
| |
| static int __init nf_conntrack_standalone_init(void) |
| { |
| #ifdef CONFIG_PROC_FS |
| struct proc_dir_entry *proc, *proc_stat; |
| #endif |
| int ret = 0; |
| |
| ret = nf_conntrack_init(); |
| if (ret < 0) |
| return ret; |
| |
| #ifdef CONFIG_PROC_FS |
| proc = proc_net_fops_create(&init_net, "nf_conntrack", 0440, &ct_file_ops); |
| if (!proc) goto cleanup_init; |
| |
| proc_stat = create_proc_entry("nf_conntrack", S_IRUGO, init_net.proc_net_stat); |
| if (!proc_stat) |
| goto cleanup_proc; |
| |
| proc_stat->proc_fops = &ct_cpu_seq_fops; |
| proc_stat->owner = THIS_MODULE; |
| #endif |
| #ifdef CONFIG_SYSCTL |
| nf_ct_sysctl_header = register_sysctl_paths(nf_ct_path, |
| nf_ct_netfilter_table); |
| if (nf_ct_sysctl_header == NULL) { |
| printk("nf_conntrack: can't register to sysctl.\n"); |
| ret = -ENOMEM; |
| goto cleanup_proc_stat; |
| } |
| #endif |
| return ret; |
| |
| #ifdef CONFIG_SYSCTL |
| cleanup_proc_stat: |
| #endif |
| #ifdef CONFIG_PROC_FS |
| remove_proc_entry("nf_conntrack", init_net. proc_net_stat); |
| cleanup_proc: |
| proc_net_remove(&init_net, "nf_conntrack"); |
| cleanup_init: |
| #endif /* CNFIG_PROC_FS */ |
| nf_conntrack_cleanup(); |
| return ret; |
| } |
| |
| static void __exit nf_conntrack_standalone_fini(void) |
| { |
| #ifdef CONFIG_SYSCTL |
| unregister_sysctl_table(nf_ct_sysctl_header); |
| #endif |
| #ifdef CONFIG_PROC_FS |
| remove_proc_entry("nf_conntrack", init_net.proc_net_stat); |
| proc_net_remove(&init_net, "nf_conntrack"); |
| #endif /* CNFIG_PROC_FS */ |
| nf_conntrack_cleanup(); |
| } |
| |
| module_init(nf_conntrack_standalone_init); |
| module_exit(nf_conntrack_standalone_fini); |
| |
| /* Some modules need us, but don't depend directly on any symbol. |
| They should call this. */ |
| void need_conntrack(void) |
| { |
| } |
| EXPORT_SYMBOL_GPL(need_conntrack); |