mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2024-08-21 21:05:31 +03:00
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@26007 3c298f89-4303-0410-b956-a3cf2f4a3e73
72 lines
1.9 KiB
Diff
72 lines
1.9 KiB
Diff
--- a/include/linux/netfilter/xt_recent.h
|
|
+++ b/include/linux/netfilter/xt_recent.h
|
|
@@ -9,6 +9,7 @@ enum {
|
|
XT_RECENT_UPDATE = 1 << 2,
|
|
XT_RECENT_REMOVE = 1 << 3,
|
|
XT_RECENT_TTL = 1 << 4,
|
|
+ XT_RECENT_REAP = 1 << 5,
|
|
|
|
XT_RECENT_SOURCE = 0,
|
|
XT_RECENT_DEST = 1,
|
|
@@ -16,6 +17,9 @@ enum {
|
|
XT_RECENT_NAME_LEN = 200,
|
|
};
|
|
|
|
+/* Only allowed with --rcheck and --update */
|
|
+#define XT_RECENT_MODIFIERS (XT_RECENT_TTL|XT_RECENT_REAP)
|
|
+
|
|
struct xt_recent_mtinfo {
|
|
__u32 seconds;
|
|
__u32 hit_count;
|
|
--- a/net/netfilter/xt_recent.c
|
|
+++ b/net/netfilter/xt_recent.c
|
|
@@ -142,6 +142,25 @@ static void recent_entry_remove(struct r
|
|
t->entries--;
|
|
}
|
|
|
|
+/*
|
|
+ * Drop entries with timestamps older then 'time'.
|
|
+ */
|
|
+static void recent_entry_reap(struct recent_table *t, unsigned long time)
|
|
+{
|
|
+ struct recent_entry *e;
|
|
+
|
|
+ /*
|
|
+ * The head of the LRU list is always the oldest entry.
|
|
+ */
|
|
+ e = list_entry(t->lru_list.next, struct recent_entry, lru_list);
|
|
+
|
|
+ /*
|
|
+ * The last time stamp is the most recent.
|
|
+ */
|
|
+ if (time_after(time, e->stamps[e->index-1]))
|
|
+ recent_entry_remove(t, e);
|
|
+}
|
|
+
|
|
static struct recent_entry *
|
|
recent_entry_init(struct recent_table *t, const union nf_inet_addr *addr,
|
|
u_int16_t family, u_int8_t ttl)
|
|
@@ -265,6 +284,10 @@ recent_mt(const struct sk_buff *skb, con
|
|
break;
|
|
}
|
|
}
|
|
+
|
|
+ /* info->seconds must be non-zero */
|
|
+ if (info->check_set & XT_RECENT_REAP)
|
|
+ recent_entry_reap(t, time);
|
|
}
|
|
|
|
if (info->check_set & XT_RECENT_SET ||
|
|
@@ -292,7 +315,10 @@ static bool recent_mt_check(const struct
|
|
XT_RECENT_CHECK | XT_RECENT_UPDATE)) != 1)
|
|
return false;
|
|
if ((info->check_set & (XT_RECENT_SET | XT_RECENT_REMOVE)) &&
|
|
- (info->seconds || info->hit_count))
|
|
+ (info->seconds || info->hit_count ||
|
|
+ (info->check_set & XT_RECENT_MODIFIERS)))
|
|
+ return false;
|
|
+ if ((info->check_set & XT_RECENT_REAP) && !info->seconds)
|
|
return false;
|
|
if (info->hit_count > ip_pkt_list_tot)
|
|
return false;
|