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-rw-r--r--net/ipv4/netfilter/Kconfig13
-rw-r--r--net/ipv4/netfilter/Makefile1
-rw-r--r--net/ipv4/netfilter/ipt_recent.c501
3 files changed, 0 insertions, 515 deletions
diff --git a/net/ipv4/netfilter/Kconfig b/net/ipv4/netfilter/Kconfig
index 90eb7cb..4e842d5 100644
--- a/net/ipv4/netfilter/Kconfig
+++ b/net/ipv4/netfilter/Kconfig
@@ -57,19 +57,6 @@ config IP_NF_IPTABLES
To compile it as a module, choose M here. If unsure, say N.
# The matches.
-config IP_NF_MATCH_RECENT
- tristate '"recent" match support'
- depends on IP_NF_IPTABLES
- depends on NETFILTER_ADVANCED
- help
- This match is used for creating one or many lists of recently
- used addresses and then matching against that/those list(s).
-
- Short options are available by using 'iptables -m recent -h'
- Official Website: <http://snowman.net/projects/ipt_recent/>
-
- To compile it as a module, choose M here. If unsure, say N.
-
config IP_NF_MATCH_ECN
tristate '"ecn" match support'
depends on IP_NF_IPTABLES
diff --git a/net/ipv4/netfilter/Makefile b/net/ipv4/netfilter/Makefile
index 3f31291f..1107edb 100644
--- a/net/ipv4/netfilter/Makefile
+++ b/net/ipv4/netfilter/Makefile
@@ -48,7 +48,6 @@ obj-$(CONFIG_IP_NF_SECURITY) += iptable_security.o
obj-$(CONFIG_IP_NF_MATCH_ADDRTYPE) += ipt_addrtype.o
obj-$(CONFIG_IP_NF_MATCH_AH) += ipt_ah.o
obj-$(CONFIG_IP_NF_MATCH_ECN) += ipt_ecn.o
-obj-$(CONFIG_IP_NF_MATCH_RECENT) += ipt_recent.o
obj-$(CONFIG_IP_NF_MATCH_TTL) += ipt_ttl.o
# targets
diff --git a/net/ipv4/netfilter/ipt_recent.c b/net/ipv4/netfilter/ipt_recent.c
deleted file mode 100644
index 3974d7c..0000000
--- a/net/ipv4/netfilter/ipt_recent.c
+++ /dev/null
@@ -1,501 +0,0 @@
-/*
- * Copyright (c) 2006 Patrick McHardy <kaber@trash.net>
- *
- * 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.
- *
- * This is a replacement of the old ipt_recent module, which carried the
- * following copyright notice:
- *
- * Author: Stephen Frost <sfrost@snowman.net>
- * Copyright 2002-2003, Stephen Frost, 2.5.x port by laforge@netfilter.org
- */
-#include <linux/init.h>
-#include <linux/ip.h>
-#include <linux/moduleparam.h>
-#include <linux/proc_fs.h>
-#include <linux/seq_file.h>
-#include <linux/string.h>
-#include <linux/ctype.h>
-#include <linux/list.h>
-#include <linux/random.h>
-#include <linux/jhash.h>
-#include <linux/bitops.h>
-#include <linux/skbuff.h>
-#include <linux/inet.h>
-#include <net/net_namespace.h>
-
-#include <linux/netfilter/x_tables.h>
-#include <linux/netfilter_ipv4/ipt_recent.h>
-
-MODULE_AUTHOR("Patrick McHardy <kaber@trash.net>");
-MODULE_DESCRIPTION("Xtables: \"recently-seen\" host matching for IPv4");
-MODULE_LICENSE("GPL");
-
-static unsigned int ip_list_tot = 100;
-static unsigned int ip_pkt_list_tot = 20;
-static unsigned int ip_list_hash_size = 0;
-static unsigned int ip_list_perms = 0644;
-static unsigned int ip_list_uid = 0;
-static unsigned int ip_list_gid = 0;
-module_param(ip_list_tot, uint, 0400);
-module_param(ip_pkt_list_tot, uint, 0400);
-module_param(ip_list_hash_size, uint, 0400);
-module_param(ip_list_perms, uint, 0400);
-module_param(ip_list_uid, uint, 0400);
-module_param(ip_list_gid, uint, 0400);
-MODULE_PARM_DESC(ip_list_tot, "number of IPs to remember per list");
-MODULE_PARM_DESC(ip_pkt_list_tot, "number of packets per IP to remember (max. 255)");
-MODULE_PARM_DESC(ip_list_hash_size, "size of hash table used to look up IPs");
-MODULE_PARM_DESC(ip_list_perms, "permissions on /proc/net/ipt_recent/* files");
-MODULE_PARM_DESC(ip_list_uid,"owner of /proc/net/ipt_recent/* files");
-MODULE_PARM_DESC(ip_list_gid,"owning group of /proc/net/ipt_recent/* files");
-
-struct recent_entry {
- struct list_head list;
- struct list_head lru_list;
- __be32 addr;
- u_int8_t ttl;
- u_int8_t index;
- u_int16_t nstamps;
- unsigned long stamps[0];
-};
-
-struct recent_table {
- struct list_head list;
- char name[IPT_RECENT_NAME_LEN];
-#ifdef CONFIG_PROC_FS
- struct proc_dir_entry *proc;
-#endif
- unsigned int refcnt;
- unsigned int entries;
- struct list_head lru_list;
- struct list_head iphash[0];
-};
-
-static LIST_HEAD(tables);
-static DEFINE_SPINLOCK(recent_lock);
-static DEFINE_MUTEX(recent_mutex);
-
-#ifdef CONFIG_PROC_FS
-static struct proc_dir_entry *proc_dir;
-static const struct file_operations recent_fops;
-#endif
-
-static u_int32_t hash_rnd;
-static int hash_rnd_initted;
-
-static unsigned int recent_entry_hash(__be32 addr)
-{
- if (!hash_rnd_initted) {
- get_random_bytes(&hash_rnd, 4);
- hash_rnd_initted = 1;
- }
- return jhash_1word((__force u32)addr, hash_rnd) & (ip_list_hash_size - 1);
-}
-
-static struct recent_entry *
-recent_entry_lookup(const struct recent_table *table, __be32 addr, u_int8_t ttl)
-{
- struct recent_entry *e;
- unsigned int h;
-
- h = recent_entry_hash(addr);
- list_for_each_entry(e, &table->iphash[h], list)
- if (e->addr == addr && (ttl == e->ttl || !ttl || !e->ttl))
- return e;
- return NULL;
-}
-
-static void recent_entry_remove(struct recent_table *t, struct recent_entry *e)
-{
- list_del(&e->list);
- list_del(&e->lru_list);
- kfree(e);
- t->entries--;
-}
-
-static struct recent_entry *
-recent_entry_init(struct recent_table *t, __be32 addr, u_int8_t ttl)
-{
- struct recent_entry *e;
-
- if (t->entries >= ip_list_tot) {
- e = list_entry(t->lru_list.next, struct recent_entry, lru_list);
- recent_entry_remove(t, e);
- }
- e = kmalloc(sizeof(*e) + sizeof(e->stamps[0]) * ip_pkt_list_tot,
- GFP_ATOMIC);
- if (e == NULL)
- return NULL;
- e->addr = addr;
- e->ttl = ttl;
- e->stamps[0] = jiffies;
- e->nstamps = 1;
- e->index = 1;
- list_add_tail(&e->list, &t->iphash[recent_entry_hash(addr)]);
- list_add_tail(&e->lru_list, &t->lru_list);
- t->entries++;
- return e;
-}
-
-static void recent_entry_update(struct recent_table *t, struct recent_entry *e)
-{
- e->stamps[e->index++] = jiffies;
- if (e->index > e->nstamps)
- e->nstamps = e->index;
- e->index %= ip_pkt_list_tot;
- list_move_tail(&e->lru_list, &t->lru_list);
-}
-
-static struct recent_table *recent_table_lookup(const char *name)
-{
- struct recent_table *t;
-
- list_for_each_entry(t, &tables, list)
- if (!strcmp(t->name, name))
- return t;
- return NULL;
-}
-
-static void recent_table_flush(struct recent_table *t)
-{
- struct recent_entry *e, *next;
- unsigned int i;
-
- for (i = 0; i < ip_list_hash_size; i++)
- list_for_each_entry_safe(e, next, &t->iphash[i], list)
- recent_entry_remove(t, e);
-}
-
-static bool
-recent_mt(const struct sk_buff *skb, const struct net_device *in,
- const struct net_device *out, const struct xt_match *match,
- const void *matchinfo, int offset, unsigned int protoff,
- bool *hotdrop)
-{
- const struct ipt_recent_info *info = matchinfo;
- struct recent_table *t;
- struct recent_entry *e;
- __be32 addr;
- u_int8_t ttl;
- bool ret = info->invert;
-
- if (info->side == IPT_RECENT_DEST)
- addr = ip_hdr(skb)->daddr;
- else
- addr = ip_hdr(skb)->saddr;
-
- ttl = ip_hdr(skb)->ttl;
- /* use TTL as seen before forwarding */
- if (out && !skb->sk)
- ttl++;
-
- spin_lock_bh(&recent_lock);
- t = recent_table_lookup(info->name);
- e = recent_entry_lookup(t, addr,
- info->check_set & IPT_RECENT_TTL ? ttl : 0);
- if (e == NULL) {
- if (!(info->check_set & IPT_RECENT_SET))
- goto out;
- e = recent_entry_init(t, addr, ttl);
- if (e == NULL)
- *hotdrop = true;
- ret = !ret;
- goto out;
- }
-
- if (info->check_set & IPT_RECENT_SET)
- ret = !ret;
- else if (info->check_set & IPT_RECENT_REMOVE) {
- recent_entry_remove(t, e);
- ret = !ret;
- } else if (info->check_set & (IPT_RECENT_CHECK | IPT_RECENT_UPDATE)) {
- unsigned long time = jiffies - info->seconds * HZ;
- unsigned int i, hits = 0;
-
- for (i = 0; i < e->nstamps; i++) {
- if (info->seconds && time_after(time, e->stamps[i]))
- continue;
- if (++hits >= info->hit_count) {
- ret = !ret;
- break;
- }
- }
- }
-
- if (info->check_set & IPT_RECENT_SET ||
- (info->check_set & IPT_RECENT_UPDATE && ret)) {
- recent_entry_update(t, e);
- e->ttl = ttl;
- }
-out:
- spin_unlock_bh(&recent_lock);
- return ret;
-}
-
-static bool
-recent_mt_check(const char *tablename, const void *ip,
- const struct xt_match *match, void *matchinfo,
- unsigned int hook_mask)
-{
- const struct ipt_recent_info *info = matchinfo;
- struct recent_table *t;
- unsigned i;
- bool ret = false;
-
- if (hweight8(info->check_set &
- (IPT_RECENT_SET | IPT_RECENT_REMOVE |
- IPT_RECENT_CHECK | IPT_RECENT_UPDATE)) != 1)
- return false;
- if ((info->check_set & (IPT_RECENT_SET | IPT_RECENT_REMOVE)) &&
- (info->seconds || info->hit_count))
- return false;
- if (info->hit_count > ip_pkt_list_tot)
- return false;
- if (info->name[0] == '\0' ||
- strnlen(info->name, IPT_RECENT_NAME_LEN) == IPT_RECENT_NAME_LEN)
- return false;
-
- mutex_lock(&recent_mutex);
- t = recent_table_lookup(info->name);
- if (t != NULL) {
- t->refcnt++;
- ret = true;
- goto out;
- }
-
- t = kzalloc(sizeof(*t) + sizeof(t->iphash[0]) * ip_list_hash_size,
- GFP_KERNEL);
- if (t == NULL)
- goto out;
- t->refcnt = 1;
- strcpy(t->name, info->name);
- INIT_LIST_HEAD(&t->lru_list);
- for (i = 0; i < ip_list_hash_size; i++)
- INIT_LIST_HEAD(&t->iphash[i]);
-#ifdef CONFIG_PROC_FS
- t->proc = proc_create(t->name, ip_list_perms, proc_dir, &recent_fops);
- if (t->proc == NULL) {
- kfree(t);
- goto out;
- }
- t->proc->uid = ip_list_uid;
- t->proc->gid = ip_list_gid;
- t->proc->data = t;
-#endif
- spin_lock_bh(&recent_lock);
- list_add_tail(&t->list, &tables);
- spin_unlock_bh(&recent_lock);
- ret = true;
-out:
- mutex_unlock(&recent_mutex);
- return ret;
-}
-
-static void recent_mt_destroy(const struct xt_match *match, void *matchinfo)
-{
- const struct ipt_recent_info *info = matchinfo;
- struct recent_table *t;
-
- mutex_lock(&recent_mutex);
- t = recent_table_lookup(info->name);
- if (--t->refcnt == 0) {
- spin_lock_bh(&recent_lock);
- list_del(&t->list);
- spin_unlock_bh(&recent_lock);
-#ifdef CONFIG_PROC_FS
- remove_proc_entry(t->name, proc_dir);
-#endif
- recent_table_flush(t);
- kfree(t);
- }
- mutex_unlock(&recent_mutex);
-}
-
-#ifdef CONFIG_PROC_FS
-struct recent_iter_state {
- struct recent_table *table;
- unsigned int bucket;
-};
-
-static void *recent_seq_start(struct seq_file *seq, loff_t *pos)
- __acquires(recent_lock)
-{
- struct recent_iter_state *st = seq->private;
- const struct recent_table *t = st->table;
- struct recent_entry *e;
- loff_t p = *pos;
-
- spin_lock_bh(&recent_lock);
-
- for (st->bucket = 0; st->bucket < ip_list_hash_size; st->bucket++)
- list_for_each_entry(e, &t->iphash[st->bucket], list)
- if (p-- == 0)
- return e;
- return NULL;
-}
-
-static void *recent_seq_next(struct seq_file *seq, void *v, loff_t *pos)
-{
- struct recent_iter_state *st = seq->private;
- const struct recent_table *t = st->table;
- struct recent_entry *e = v;
- struct list_head *head = e->list.next;
-
- while (head == &t->iphash[st->bucket]) {
- if (++st->bucket >= ip_list_hash_size)
- return NULL;
- head = t->iphash[st->bucket].next;
- }
- (*pos)++;
- return list_entry(head, struct recent_entry, list);
-}
-
-static void recent_seq_stop(struct seq_file *s, void *v)
- __releases(recent_lock)
-{
- spin_unlock_bh(&recent_lock);
-}
-
-static int recent_seq_show(struct seq_file *seq, void *v)
-{
- const struct recent_entry *e = v;
- unsigned int i;
-
- i = (e->index - 1) % ip_pkt_list_tot;
- seq_printf(seq, "src=%u.%u.%u.%u ttl: %u last_seen: %lu oldest_pkt: %u",
- NIPQUAD(e->addr), e->ttl, e->stamps[i], e->index);
- for (i = 0; i < e->nstamps; i++)
- seq_printf(seq, "%s %lu", i ? "," : "", e->stamps[i]);
- seq_printf(seq, "\n");
- return 0;
-}
-
-static const struct seq_operations recent_seq_ops = {
- .start = recent_seq_start,
- .next = recent_seq_next,
- .stop = recent_seq_stop,
- .show = recent_seq_show,
-};
-
-static int recent_seq_open(struct inode *inode, struct file *file)
-{
- struct proc_dir_entry *pde = PDE(inode);
- struct recent_iter_state *st;
-
- st = __seq_open_private(file, &recent_seq_ops, sizeof(*st));
- if (st == NULL)
- return -ENOMEM;
-
- st->table = pde->data;
- return 0;
-}
-
-static ssize_t recent_proc_write(struct file *file, const char __user *input,
- size_t size, loff_t *loff)
-{
- const struct proc_dir_entry *pde = PDE(file->f_path.dentry->d_inode);
- struct recent_table *t = pde->data;
- struct recent_entry *e;
- char buf[sizeof("+255.255.255.255")], *c = buf;
- __be32 addr;
- int add;
-
- if (size > sizeof(buf))
- size = sizeof(buf);
- if (copy_from_user(buf, input, size))
- return -EFAULT;
- while (isspace(*c))
- c++;
-
- if (size - (c - buf) < 5)
- return c - buf;
- if (!strncmp(c, "clear", 5)) {
- c += 5;
- spin_lock_bh(&recent_lock);
- recent_table_flush(t);
- spin_unlock_bh(&recent_lock);
- return c - buf;
- }
-
- switch (*c) {
- case '-':
- add = 0;
- c++;
- break;
- case '+':
- c++;
- default:
- add = 1;
- break;
- }
- addr = in_aton(c);
-
- spin_lock_bh(&recent_lock);
- e = recent_entry_lookup(t, addr, 0);
- if (e == NULL) {
- if (add)
- recent_entry_init(t, addr, 0);
- } else {
- if (add)
- recent_entry_update(t, e);
- else
- recent_entry_remove(t, e);
- }
- spin_unlock_bh(&recent_lock);
- return size;
-}
-
-static const struct file_operations recent_fops = {
- .open = recent_seq_open,
- .read = seq_read,
- .write = recent_proc_write,
- .release = seq_release_private,
- .owner = THIS_MODULE,
-};
-#endif /* CONFIG_PROC_FS */
-
-static struct xt_match recent_mt_reg __read_mostly = {
- .name = "recent",
- .family = AF_INET,
- .match = recent_mt,
- .matchsize = sizeof(struct ipt_recent_info),
- .checkentry = recent_mt_check,
- .destroy = recent_mt_destroy,
- .me = THIS_MODULE,
-};
-
-static int __init recent_mt_init(void)
-{
- int err;
-
- if (!ip_list_tot || !ip_pkt_list_tot || ip_pkt_list_tot > 255)
- return -EINVAL;
- ip_list_hash_size = 1 << fls(ip_list_tot);
-
- err = xt_register_match(&recent_mt_reg);
-#ifdef CONFIG_PROC_FS
- if (err)
- return err;
- proc_dir = proc_mkdir("ipt_recent", init_net.proc_net);
- if (proc_dir == NULL) {
- xt_unregister_match(&recent_mt_reg);
- err = -ENOMEM;
- }
-#endif
- return err;
-}
-
-static void __exit recent_mt_exit(void)
-{
- BUG_ON(!list_empty(&tables));
- xt_unregister_match(&recent_mt_reg);
-#ifdef CONFIG_PROC_FS
- remove_proc_entry("ipt_recent", init_net.proc_net);
-#endif
-}
-
-module_init(recent_mt_init);
-module_exit(recent_mt_exit);
generated by cgit v0.10.2 at 2024-10-31 20:25:15 (GMT)