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authorBalazs Scheidler <bazsi@balabit.hu>2010-10-21 12:45:14 +0200
committerPatrick McHardy <kaber@trash.net>2010-10-21 12:45:14 +0200
commit106e4c26b1529e559d1aae777f11b4f8f7bafc26 (patch)
treee784c61379e767255bf941f9d78d9ef6e7c58640 /include/net
parentd86bef73b4a24e59e7c1f896a72bbf38430ac2c6 (diff)
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tproxy: kick out TIME_WAIT sockets in case a new connection comes in with the same tuple
Without tproxy redirections an incoming SYN kicks out conflicting TIME_WAIT sockets, in order to handle clients that reuse ports within the TIME_WAIT period. The same mechanism didn't work in case TProxy is involved in finding the proper socket, as the time_wait processing code looked up the listening socket assuming that the listener addr/port matches those of the established connection. This is not the case with TProxy as the listener addr/port is possibly changed with the tproxy rule. Signed-off-by: Balazs Scheidler <bazsi@balabit.hu> Signed-off-by: KOVACS Krisztian <hidden@balabit.hu> Signed-off-by: Patrick McHardy <kaber@trash.net>
Diffstat (limited to 'include/net')
-rw-r--r--include/net/netfilter/nf_tproxy_core.h6
1 files changed, 5 insertions, 1 deletions
diff --git a/include/net/netfilter/nf_tproxy_core.h b/include/net/netfilter/nf_tproxy_core.h
index 208b46f4d6d..b3a8942a4e6 100644
--- a/include/net/netfilter/nf_tproxy_core.h
+++ b/include/net/netfilter/nf_tproxy_core.h
@@ -8,12 +8,16 @@
#include <net/inet_sock.h>
#include <net/tcp.h>
+#define NFT_LOOKUP_ANY 0
+#define NFT_LOOKUP_LISTENER 1
+#define NFT_LOOKUP_ESTABLISHED 2
+
/* look up and get a reference to a matching socket */
extern struct sock *
nf_tproxy_get_sock_v4(struct net *net, const u8 protocol,
const __be32 saddr, const __be32 daddr,
const __be16 sport, const __be16 dport,
- const struct net_device *in, bool listening);
+ const struct net_device *in, int lookup_type);
static inline void
nf_tproxy_put_sock(struct sock *sk)