kernel: flow-offload: only offload connections that have been fully established

Signed-off-by: Felix Fietkau <nbd@nbd.name>

diff --git a/target/linux/generic/hack-4.14/650-netfilter-add-xt_OFFLOAD-target.patch b/target/linux/generic/hack-4.14/650-netfilter-add-xt_OFFLOAD-target.patch
index 40f89d4d913ecb5e3c4766b62e328f03aec95960..5c40961c37b941c56dd969aaf4b655e1e5a35afc 100644 (file)
--- a/target/linux/generic/hack-4.14/650-netfilter-add-xt_OFFLOAD-target.patch
+++ b/target/linux/generic/hack-4.14/650-netfilter-add-xt_OFFLOAD-target.patch
@@ -98,7 +98,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
  obj-$(CONFIG_NETFILTER_XT_TARGET_LED) += xt_LED.o
 --- /dev/null
 +++ b/net/netfilter/xt_FLOWOFFLOAD.c
-@@ -0,0 +1,335 @@
+@@ -0,0 +1,338 @@
 +/*
 + * Copyright (C) 2018 Felix Fietkau <nbd@nbd.name>
 + *
@@ -337,6 +337,9 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
 +
 +      switch (ct->tuplehash[IP_CT_DIR_ORIGINAL].tuple.dst.protonum) {
 +      case IPPROTO_TCP:
++              if (ct->proto.tcp.state != TCP_CONNTRACK_ESTABLISHED)
++                      return XT_CONTINUE;
++              break;
 +      case IPPROTO_UDP:
 +              break;
 +      default: