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authorJo-Philipp Wich <jow@openwrt.org>2011-03-10 13:50:19 +0000
committerJo-Philipp Wich <jow@openwrt.org>2011-03-10 13:50:19 +0000
commit05236294f3fa66bef05f83cc6dc4d8bc56a1b4b4 (patch)
tree4a3f1081cc5874bebac5625a721b5161c6eb4597 /target/linux/generic/patches-2.6.31
parent2efb2ef8b1b6b3af989496157c3ef1243c817a6b (diff)
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Âbackport upstream commit 0079c5aee34880bcee7feee9960f0502c73dc5fa (xt_recent entry reaper) to kernels 2.6.30, 2.6.31, 2.6.32 and 2.6.34
SVN-Revision: 26007
Diffstat (limited to 'target/linux/generic/patches-2.6.31')
-rw-r--r--target/linux/generic/patches-2.6.31/120-netfilter_recent_reap.patch71
1 files changed, 71 insertions, 0 deletions
diff --git a/target/linux/generic/patches-2.6.31/120-netfilter_recent_reap.patch b/target/linux/generic/patches-2.6.31/120-netfilter_recent_reap.patch
new file mode 100644
index 0000000..8ac3954
--- /dev/null
+++ b/target/linux/generic/patches-2.6.31/120-netfilter_recent_reap.patch
@@ -0,0 +1,71 @@
+--- 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;