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-rw-r--r--target/linux/generic/hack-4.19/650-netfilter-add-xt_OFFLOAD-target.patch38
1 files changed, 25 insertions, 13 deletions
diff --git a/target/linux/generic/hack-4.19/650-netfilter-add-xt_OFFLOAD-target.patch b/target/linux/generic/hack-4.19/650-netfilter-add-xt_OFFLOAD-target.patch
index b207f9d084..bc5a5eba58 100644
--- a/target/linux/generic/hack-4.19/650-netfilter-add-xt_OFFLOAD-target.patch
+++ b/target/linux/generic/hack-4.19/650-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 +1,371 @@
+@@ -0,0 +1,383 @@
+/*
+ * Copyright (C) 2018 Felix Fietkau <nbd@nbd.name>
+ *
@@ -112,6 +112,8 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
+#include <linux/netfilter/xt_FLOWOFFLOAD.h>
+#include <net/ip.h>
+#include <net/netfilter/nf_conntrack.h>
++#include <net/netfilter/nf_conntrack_extend.h>
++#include <net/netfilter/nf_conntrack_helper.h>
+#include <net/netfilter/nf_flow_table.h>
+
+static struct nf_flowtable nf_flowtable;
@@ -279,21 +281,24 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
+}
+
+static bool
-+xt_flowoffload_skip(struct sk_buff *skb)
++xt_flowoffload_skip(struct sk_buff *skb, int family)
+{
-+ struct ip_options *opt = &(IPCB(skb)->opt);
-+
-+ if (unlikely(opt->optlen))
-+ return true;
+ if (skb_sec_path(skb))
+ return true;
+
++ if (family == NFPROTO_IPV4) {
++ const struct ip_options *opt = &(IPCB(skb)->opt);
++
++ if (unlikely(opt->optlen))
++ return true;
++ }
++
+ return false;
+}
+
+static struct dst_entry *
+xt_flowoffload_dst(const struct nf_conn *ct, enum ip_conntrack_dir dir,
-+ const struct xt_action_param *par)
++ const struct xt_action_param *par, int ifindex)
+{
+ struct dst_entry *dst = NULL;
+ struct flowi fl;
@@ -321,8 +326,8 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
+{
+ struct dst_entry *this_dst, *other_dst;
+
-+ this_dst = xt_flowoffload_dst(ct, dir, par);
-+ other_dst = xt_flowoffload_dst(ct, !dir, par);
++ this_dst = xt_flowoffload_dst(ct, !dir, par, xt_out(par)->ifindex);
++ other_dst = xt_flowoffload_dst(ct, dir, par, xt_in(par)->ifindex);
+ if (!this_dst || !other_dst)
+ return -ENOENT;
+
@@ -345,8 +350,9 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
+ struct flow_offload *flow;
+ struct nf_conn *ct;
+ struct net *net;
++ bool is_tcp = false;
+
-+ if (xt_flowoffload_skip(skb))
++ if (xt_flowoffload_skip(skb, xt_family(par)))
+ return XT_CONTINUE;
+
+ ct = nf_ct_get(skb, &ctinfo);
@@ -357,6 +363,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
+ case IPPROTO_TCP:
+ if (ct->proto.tcp.state != TCP_CONNTRACK_ESTABLISHED)
+ return XT_CONTINUE;
++ is_tcp = true;
+ break;
+ case IPPROTO_UDP:
+ break;
@@ -364,11 +371,11 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
+ return XT_CONTINUE;
+ }
+
-+ if (test_bit(IPS_HELPER_BIT, &ct->status))
++ if (nf_ct_ext_exist(ct, NF_CT_EXT_HELPER) ||
++ ct->status & IPS_SEQ_ADJUST)
+ return XT_CONTINUE;
+
-+ if (ctinfo == IP_CT_NEW ||
-+ ctinfo == IP_CT_RELATED)
++ if (!nf_ct_is_confirmed(ct))
+ return XT_CONTINUE;
+
+ if (!xt_in(par) || !xt_out(par))
@@ -386,6 +393,11 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
+ if (!flow)
+ goto err_flow_alloc;
+
++ if (is_tcp) {
++ ct->proto.tcp.seen[0].flags |= IP_CT_TCP_FLAG_BE_LIBERAL;
++ ct->proto.tcp.seen[1].flags |= IP_CT_TCP_FLAG_BE_LIBERAL;
++ }
++
+ if (flow_offload_add(&nf_flowtable, flow) < 0)
+ goto err_flow_add;
+