#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("IP tables recently seen matching module");
+MODULE_DESCRIPTION("Xtables: \"recently-seen\" host matching for IPv4");
MODULE_LICENSE("GPL");
static unsigned int ip_list_tot = 100;
}
static bool
-ipt_recent_match(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)
+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;
recent_entry_remove(t, e);
ret = !ret;
} else if (info->check_set & (IPT_RECENT_CHECK | IPT_RECENT_UPDATE)) {
- unsigned long t = jiffies - info->seconds * HZ;
+ unsigned long time = jiffies - info->seconds * HZ;
unsigned int i, hits = 0;
for (i = 0; i < e->nstamps; i++) {
- if (info->seconds && time_after(t, e->stamps[i]))
+ if (info->seconds && time_after(time, e->stamps[i]))
continue;
if (++hits >= info->hit_count) {
ret = !ret;
}
static bool
-ipt_recent_checkentry(const char *tablename, const void *ip,
- const struct xt_match *match, void *matchinfo,
- unsigned int hook_mask)
+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;
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;
for (i = 0; i < ip_list_hash_size; i++)
INIT_LIST_HEAD(&t->iphash[i]);
#ifdef CONFIG_PROC_FS
- t->proc = create_proc_entry(t->name, ip_list_perms, proc_dir);
+ t->proc = proc_create(t->name, ip_list_perms, proc_dir, &recent_fops);
if (t->proc == NULL) {
kfree(t);
goto out;
}
- t->proc->proc_fops = &recent_fops;
t->proc->uid = ip_list_uid;
t->proc->gid = ip_list_gid;
t->proc->data = t;
return ret;
}
-static void
-ipt_recent_destroy(const struct xt_match *match, void *matchinfo)
+static void recent_mt_destroy(const struct xt_match *match, void *matchinfo)
{
const struct ipt_recent_info *info = matchinfo;
struct recent_table *t;
};
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;
static void *recent_seq_next(struct seq_file *seq, void *v, loff_t *pos)
{
struct recent_iter_state *st = seq->private;
- struct recent_table *t = st->table;
+ const struct recent_table *t = st->table;
struct recent_entry *e = v;
struct list_head *head = e->list.next;
}
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)
{
- struct recent_entry *e = v;
+ const struct recent_entry *e = v;
unsigned int i;
i = (e->index - 1) % ip_pkt_list_tot;
static int recent_seq_open(struct inode *inode, struct file *file)
{
struct proc_dir_entry *pde = PDE(inode);
- struct seq_file *seq;
struct recent_iter_state *st;
- int ret;
- st = kzalloc(sizeof(*st), GFP_KERNEL);
+ st = __seq_open_private(file, &recent_seq_ops, sizeof(*st));
if (st == NULL)
return -ENOMEM;
- ret = seq_open(file, &recent_seq_ops);
- if (ret) {
- kfree(st);
- goto out;
- }
-
st->table = pde->data;
- seq = file->private_data;
- seq->private = st;
-out:
- return ret;
+ return 0;
}
static ssize_t recent_proc_write(struct file *file, const char __user *input,
size_t size, loff_t *loff)
{
- struct proc_dir_entry *pde = PDE(file->f_path.dentry->d_inode);
+ 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;
};
#endif /* CONFIG_PROC_FS */
-static struct xt_match recent_match __read_mostly = {
+static struct xt_match recent_mt_reg __read_mostly = {
.name = "recent",
.family = AF_INET,
- .match = ipt_recent_match,
+ .match = recent_mt,
.matchsize = sizeof(struct ipt_recent_info),
- .checkentry = ipt_recent_checkentry,
- .destroy = ipt_recent_destroy,
+ .checkentry = recent_mt_check,
+ .destroy = recent_mt_destroy,
.me = THIS_MODULE,
};
-static int __init ipt_recent_init(void)
+static int __init recent_mt_init(void)
{
int err;
return -EINVAL;
ip_list_hash_size = 1 << fls(ip_list_tot);
- err = xt_register_match(&recent_match);
+ err = xt_register_match(&recent_mt_reg);
#ifdef CONFIG_PROC_FS
if (err)
return err;
- proc_dir = proc_mkdir("ipt_recent", proc_net);
+ proc_dir = proc_mkdir("ipt_recent", init_net.proc_net);
if (proc_dir == NULL) {
- xt_unregister_match(&recent_match);
+ xt_unregister_match(&recent_mt_reg);
err = -ENOMEM;
}
#endif
return err;
}
-static void __exit ipt_recent_exit(void)
+static void __exit recent_mt_exit(void)
{
BUG_ON(!list_empty(&tables));
- xt_unregister_match(&recent_match);
+ xt_unregister_match(&recent_mt_reg);
#ifdef CONFIG_PROC_FS
- remove_proc_entry("ipt_recent", proc_net);
+ remove_proc_entry("ipt_recent", init_net.proc_net);
#endif
}
-module_init(ipt_recent_init);
-module_exit(ipt_recent_exit);
+module_init(recent_mt_init);
+module_exit(recent_mt_exit);
git://ftp.safe.ca / safe / jmp / linux-2.6 / blobdiff