You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
522 lines
14 KiB
522 lines
14 KiB
From: Felix Fietkau <nbd@nbd.name>
|
|
Date: Sat, 17 Feb 2018 11:49:44 +0100
|
|
Subject: [PATCH] netfilter: nf_flow_table: move ipv4 offload hook code to
|
|
nf_flow_table
|
|
|
|
Allows some minor code sharing with the ipv6 hook code and is also
|
|
useful as preparation for adding iptables support for offload
|
|
|
|
Signed-off-by: Felix Fietkau <nbd@nbd.name>
|
|
---
|
|
create mode 100644 net/netfilter/nf_flow_table_ip.c
|
|
|
|
--- a/net/ipv4/netfilter/nf_flow_table_ipv4.c
|
|
+++ b/net/ipv4/netfilter/nf_flow_table_ipv4.c
|
|
@@ -2,248 +2,8 @@
|
|
#include <linux/init.h>
|
|
#include <linux/module.h>
|
|
#include <linux/netfilter.h>
|
|
-#include <linux/rhashtable.h>
|
|
-#include <linux/ip.h>
|
|
-#include <linux/netdevice.h>
|
|
-#include <net/ip.h>
|
|
-#include <net/neighbour.h>
|
|
#include <net/netfilter/nf_flow_table.h>
|
|
#include <net/netfilter/nf_tables.h>
|
|
-/* For layer 4 checksum field offset. */
|
|
-#include <linux/tcp.h>
|
|
-#include <linux/udp.h>
|
|
-
|
|
-static int nf_flow_nat_ip_tcp(struct sk_buff *skb, unsigned int thoff,
|
|
- __be32 addr, __be32 new_addr)
|
|
-{
|
|
- struct tcphdr *tcph;
|
|
-
|
|
- if (!pskb_may_pull(skb, thoff + sizeof(*tcph)) ||
|
|
- skb_try_make_writable(skb, thoff + sizeof(*tcph)))
|
|
- return -1;
|
|
-
|
|
- tcph = (void *)(skb_network_header(skb) + thoff);
|
|
- inet_proto_csum_replace4(&tcph->check, skb, addr, new_addr, true);
|
|
-
|
|
- return 0;
|
|
-}
|
|
-
|
|
-static int nf_flow_nat_ip_udp(struct sk_buff *skb, unsigned int thoff,
|
|
- __be32 addr, __be32 new_addr)
|
|
-{
|
|
- struct udphdr *udph;
|
|
-
|
|
- if (!pskb_may_pull(skb, thoff + sizeof(*udph)) ||
|
|
- skb_try_make_writable(skb, thoff + sizeof(*udph)))
|
|
- return -1;
|
|
-
|
|
- udph = (void *)(skb_network_header(skb) + thoff);
|
|
- if (udph->check || skb->ip_summed == CHECKSUM_PARTIAL) {
|
|
- inet_proto_csum_replace4(&udph->check, skb, addr,
|
|
- new_addr, true);
|
|
- if (!udph->check)
|
|
- udph->check = CSUM_MANGLED_0;
|
|
- }
|
|
-
|
|
- return 0;
|
|
-}
|
|
-
|
|
-static int nf_flow_nat_ip_l4proto(struct sk_buff *skb, struct iphdr *iph,
|
|
- unsigned int thoff, __be32 addr,
|
|
- __be32 new_addr)
|
|
-{
|
|
- switch (iph->protocol) {
|
|
- case IPPROTO_TCP:
|
|
- if (nf_flow_nat_ip_tcp(skb, thoff, addr, new_addr) < 0)
|
|
- return NF_DROP;
|
|
- break;
|
|
- case IPPROTO_UDP:
|
|
- if (nf_flow_nat_ip_udp(skb, thoff, addr, new_addr) < 0)
|
|
- return NF_DROP;
|
|
- break;
|
|
- }
|
|
-
|
|
- return 0;
|
|
-}
|
|
-
|
|
-static int nf_flow_snat_ip(const struct flow_offload *flow, struct sk_buff *skb,
|
|
- struct iphdr *iph, unsigned int thoff,
|
|
- enum flow_offload_tuple_dir dir)
|
|
-{
|
|
- __be32 addr, new_addr;
|
|
-
|
|
- switch (dir) {
|
|
- case FLOW_OFFLOAD_DIR_ORIGINAL:
|
|
- addr = iph->saddr;
|
|
- new_addr = flow->tuplehash[FLOW_OFFLOAD_DIR_REPLY].tuple.dst_v4.s_addr;
|
|
- iph->saddr = new_addr;
|
|
- break;
|
|
- case FLOW_OFFLOAD_DIR_REPLY:
|
|
- addr = iph->daddr;
|
|
- new_addr = flow->tuplehash[FLOW_OFFLOAD_DIR_ORIGINAL].tuple.src_v4.s_addr;
|
|
- iph->daddr = new_addr;
|
|
- break;
|
|
- default:
|
|
- return -1;
|
|
- }
|
|
- csum_replace4(&iph->check, addr, new_addr);
|
|
-
|
|
- return nf_flow_nat_ip_l4proto(skb, iph, thoff, addr, new_addr);
|
|
-}
|
|
-
|
|
-static int nf_flow_dnat_ip(const struct flow_offload *flow, struct sk_buff *skb,
|
|
- struct iphdr *iph, unsigned int thoff,
|
|
- enum flow_offload_tuple_dir dir)
|
|
-{
|
|
- __be32 addr, new_addr;
|
|
-
|
|
- switch (dir) {
|
|
- case FLOW_OFFLOAD_DIR_ORIGINAL:
|
|
- addr = iph->daddr;
|
|
- new_addr = flow->tuplehash[FLOW_OFFLOAD_DIR_REPLY].tuple.src_v4.s_addr;
|
|
- iph->daddr = new_addr;
|
|
- break;
|
|
- case FLOW_OFFLOAD_DIR_REPLY:
|
|
- addr = iph->saddr;
|
|
- new_addr = flow->tuplehash[FLOW_OFFLOAD_DIR_ORIGINAL].tuple.dst_v4.s_addr;
|
|
- iph->saddr = new_addr;
|
|
- break;
|
|
- default:
|
|
- return -1;
|
|
- }
|
|
-
|
|
- return nf_flow_nat_ip_l4proto(skb, iph, thoff, addr, new_addr);
|
|
-}
|
|
-
|
|
-static int nf_flow_nat_ip(const struct flow_offload *flow, struct sk_buff *skb,
|
|
- enum flow_offload_tuple_dir dir)
|
|
-{
|
|
- struct iphdr *iph = ip_hdr(skb);
|
|
- unsigned int thoff = iph->ihl * 4;
|
|
-
|
|
- if (flow->flags & FLOW_OFFLOAD_SNAT &&
|
|
- (nf_flow_snat_port(flow, skb, thoff, iph->protocol, dir) < 0 ||
|
|
- nf_flow_snat_ip(flow, skb, iph, thoff, dir) < 0))
|
|
- return -1;
|
|
- if (flow->flags & FLOW_OFFLOAD_DNAT &&
|
|
- (nf_flow_dnat_port(flow, skb, thoff, iph->protocol, dir) < 0 ||
|
|
- nf_flow_dnat_ip(flow, skb, iph, thoff, dir) < 0))
|
|
- return -1;
|
|
-
|
|
- return 0;
|
|
-}
|
|
-
|
|
-static bool ip_has_options(unsigned int thoff)
|
|
-{
|
|
- return thoff != sizeof(struct iphdr);
|
|
-}
|
|
-
|
|
-static int nf_flow_tuple_ip(struct sk_buff *skb, const struct net_device *dev,
|
|
- struct flow_offload_tuple *tuple)
|
|
-{
|
|
- struct flow_ports *ports;
|
|
- unsigned int thoff;
|
|
- struct iphdr *iph;
|
|
-
|
|
- if (!pskb_may_pull(skb, sizeof(*iph)))
|
|
- return -1;
|
|
-
|
|
- iph = ip_hdr(skb);
|
|
- thoff = iph->ihl * 4;
|
|
-
|
|
- if (ip_is_fragment(iph) ||
|
|
- unlikely(ip_has_options(thoff)))
|
|
- return -1;
|
|
-
|
|
- if (iph->protocol != IPPROTO_TCP &&
|
|
- iph->protocol != IPPROTO_UDP)
|
|
- return -1;
|
|
-
|
|
- thoff = iph->ihl * 4;
|
|
- if (!pskb_may_pull(skb, thoff + sizeof(*ports)))
|
|
- return -1;
|
|
-
|
|
- ports = (struct flow_ports *)(skb_network_header(skb) + thoff);
|
|
-
|
|
- tuple->src_v4.s_addr = iph->saddr;
|
|
- tuple->dst_v4.s_addr = iph->daddr;
|
|
- tuple->src_port = ports->source;
|
|
- tuple->dst_port = ports->dest;
|
|
- tuple->l3proto = AF_INET;
|
|
- tuple->l4proto = iph->protocol;
|
|
- tuple->iifidx = dev->ifindex;
|
|
-
|
|
- return 0;
|
|
-}
|
|
-
|
|
-/* Based on ip_exceeds_mtu(). */
|
|
-static bool nf_flow_exceeds_mtu(const struct sk_buff *skb, unsigned int mtu)
|
|
-{
|
|
- if (skb->len <= mtu)
|
|
- return false;
|
|
-
|
|
- if ((ip_hdr(skb)->frag_off & htons(IP_DF)) == 0)
|
|
- return false;
|
|
-
|
|
- if (skb_is_gso(skb) && skb_gso_validate_mtu(skb, mtu))
|
|
- return false;
|
|
-
|
|
- return true;
|
|
-}
|
|
-
|
|
-unsigned int
|
|
-nf_flow_offload_ip_hook(void *priv, struct sk_buff *skb,
|
|
- const struct nf_hook_state *state)
|
|
-{
|
|
- struct flow_offload_tuple_rhash *tuplehash;
|
|
- struct nf_flowtable *flow_table = priv;
|
|
- struct flow_offload_tuple tuple = {};
|
|
- enum flow_offload_tuple_dir dir;
|
|
- struct flow_offload *flow;
|
|
- struct net_device *outdev;
|
|
- const struct rtable *rt;
|
|
- struct iphdr *iph;
|
|
- __be32 nexthop;
|
|
-
|
|
- if (skb->protocol != htons(ETH_P_IP))
|
|
- return NF_ACCEPT;
|
|
-
|
|
- if (nf_flow_tuple_ip(skb, state->in, &tuple) < 0)
|
|
- return NF_ACCEPT;
|
|
-
|
|
- tuplehash = flow_offload_lookup(flow_table, &tuple);
|
|
- if (tuplehash == NULL)
|
|
- return NF_ACCEPT;
|
|
-
|
|
- outdev = dev_get_by_index_rcu(state->net, tuplehash->tuple.oifidx);
|
|
- if (!outdev)
|
|
- return NF_ACCEPT;
|
|
-
|
|
- dir = tuplehash->tuple.dir;
|
|
- flow = container_of(tuplehash, struct flow_offload, tuplehash[dir]);
|
|
- rt = (const struct rtable *)flow->tuplehash[dir].tuple.dst_cache;
|
|
-
|
|
- if (unlikely(nf_flow_exceeds_mtu(skb, flow->tuplehash[dir].tuple.mtu)))
|
|
- return NF_ACCEPT;
|
|
-
|
|
- if (skb_try_make_writable(skb, sizeof(*iph)))
|
|
- return NF_DROP;
|
|
-
|
|
- if (flow->flags & (FLOW_OFFLOAD_SNAT | FLOW_OFFLOAD_DNAT) &&
|
|
- nf_flow_nat_ip(flow, skb, dir) < 0)
|
|
- return NF_DROP;
|
|
-
|
|
- flow->timeout = (u32)jiffies + NF_FLOW_TIMEOUT;
|
|
- iph = ip_hdr(skb);
|
|
- ip_decrease_ttl(iph);
|
|
-
|
|
- skb->dev = outdev;
|
|
- nexthop = rt_nexthop(rt, flow->tuplehash[!dir].tuple.src_v4.s_addr);
|
|
- neigh_xmit(NEIGH_ARP_TABLE, outdev, &nexthop, skb);
|
|
-
|
|
- return NF_STOLEN;
|
|
-}
|
|
-EXPORT_SYMBOL_GPL(nf_flow_offload_ip_hook);
|
|
|
|
static struct nf_flowtable_type flowtable_ipv4 = {
|
|
.family = NFPROTO_IPV4,
|
|
--- a/net/netfilter/Makefile
|
|
+++ b/net/netfilter/Makefile
|
|
@@ -113,7 +113,7 @@ obj-$(CONFIG_NFT_FWD_NETDEV) += nft_fwd_
|
|
|
|
# flow table infrastructure
|
|
obj-$(CONFIG_NF_FLOW_TABLE) += nf_flow_table.o
|
|
-nf_flow_table-objs := nf_flow_table_core.o
|
|
+nf_flow_table-objs := nf_flow_table_core.o nf_flow_table_ip.o
|
|
|
|
obj-$(CONFIG_NF_FLOW_TABLE_INET) += nf_flow_table_inet.o
|
|
|
|
--- /dev/null
|
|
+++ b/net/netfilter/nf_flow_table_ip.c
|
|
@@ -0,0 +1,245 @@
|
|
+#include <linux/kernel.h>
|
|
+#include <linux/init.h>
|
|
+#include <linux/module.h>
|
|
+#include <linux/netfilter.h>
|
|
+#include <linux/rhashtable.h>
|
|
+#include <linux/ip.h>
|
|
+#include <linux/netdevice.h>
|
|
+#include <net/ip.h>
|
|
+#include <net/neighbour.h>
|
|
+#include <net/netfilter/nf_flow_table.h>
|
|
+/* For layer 4 checksum field offset. */
|
|
+#include <linux/tcp.h>
|
|
+#include <linux/udp.h>
|
|
+
|
|
+static int nf_flow_nat_ip_tcp(struct sk_buff *skb, unsigned int thoff,
|
|
+ __be32 addr, __be32 new_addr)
|
|
+{
|
|
+ struct tcphdr *tcph;
|
|
+
|
|
+ if (!pskb_may_pull(skb, thoff + sizeof(*tcph)) ||
|
|
+ skb_try_make_writable(skb, thoff + sizeof(*tcph)))
|
|
+ return -1;
|
|
+
|
|
+ tcph = (void *)(skb_network_header(skb) + thoff);
|
|
+ inet_proto_csum_replace4(&tcph->check, skb, addr, new_addr, true);
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+static int nf_flow_nat_ip_udp(struct sk_buff *skb, unsigned int thoff,
|
|
+ __be32 addr, __be32 new_addr)
|
|
+{
|
|
+ struct udphdr *udph;
|
|
+
|
|
+ if (!pskb_may_pull(skb, thoff + sizeof(*udph)) ||
|
|
+ skb_try_make_writable(skb, thoff + sizeof(*udph)))
|
|
+ return -1;
|
|
+
|
|
+ udph = (void *)(skb_network_header(skb) + thoff);
|
|
+ if (udph->check || skb->ip_summed == CHECKSUM_PARTIAL) {
|
|
+ inet_proto_csum_replace4(&udph->check, skb, addr,
|
|
+ new_addr, true);
|
|
+ if (!udph->check)
|
|
+ udph->check = CSUM_MANGLED_0;
|
|
+ }
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+static int nf_flow_nat_ip_l4proto(struct sk_buff *skb, struct iphdr *iph,
|
|
+ unsigned int thoff, __be32 addr,
|
|
+ __be32 new_addr)
|
|
+{
|
|
+ switch (iph->protocol) {
|
|
+ case IPPROTO_TCP:
|
|
+ if (nf_flow_nat_ip_tcp(skb, thoff, addr, new_addr) < 0)
|
|
+ return NF_DROP;
|
|
+ break;
|
|
+ case IPPROTO_UDP:
|
|
+ if (nf_flow_nat_ip_udp(skb, thoff, addr, new_addr) < 0)
|
|
+ return NF_DROP;
|
|
+ break;
|
|
+ }
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+static int nf_flow_snat_ip(const struct flow_offload *flow, struct sk_buff *skb,
|
|
+ struct iphdr *iph, unsigned int thoff,
|
|
+ enum flow_offload_tuple_dir dir)
|
|
+{
|
|
+ __be32 addr, new_addr;
|
|
+
|
|
+ switch (dir) {
|
|
+ case FLOW_OFFLOAD_DIR_ORIGINAL:
|
|
+ addr = iph->saddr;
|
|
+ new_addr = flow->tuplehash[FLOW_OFFLOAD_DIR_REPLY].tuple.dst_v4.s_addr;
|
|
+ iph->saddr = new_addr;
|
|
+ break;
|
|
+ case FLOW_OFFLOAD_DIR_REPLY:
|
|
+ addr = iph->daddr;
|
|
+ new_addr = flow->tuplehash[FLOW_OFFLOAD_DIR_ORIGINAL].tuple.src_v4.s_addr;
|
|
+ iph->daddr = new_addr;
|
|
+ break;
|
|
+ default:
|
|
+ return -1;
|
|
+ }
|
|
+ csum_replace4(&iph->check, addr, new_addr);
|
|
+
|
|
+ return nf_flow_nat_ip_l4proto(skb, iph, thoff, addr, new_addr);
|
|
+}
|
|
+
|
|
+static int nf_flow_dnat_ip(const struct flow_offload *flow, struct sk_buff *skb,
|
|
+ struct iphdr *iph, unsigned int thoff,
|
|
+ enum flow_offload_tuple_dir dir)
|
|
+{
|
|
+ __be32 addr, new_addr;
|
|
+
|
|
+ switch (dir) {
|
|
+ case FLOW_OFFLOAD_DIR_ORIGINAL:
|
|
+ addr = iph->daddr;
|
|
+ new_addr = flow->tuplehash[FLOW_OFFLOAD_DIR_REPLY].tuple.src_v4.s_addr;
|
|
+ iph->daddr = new_addr;
|
|
+ break;
|
|
+ case FLOW_OFFLOAD_DIR_REPLY:
|
|
+ addr = iph->saddr;
|
|
+ new_addr = flow->tuplehash[FLOW_OFFLOAD_DIR_ORIGINAL].tuple.dst_v4.s_addr;
|
|
+ iph->saddr = new_addr;
|
|
+ break;
|
|
+ default:
|
|
+ return -1;
|
|
+ }
|
|
+
|
|
+ return nf_flow_nat_ip_l4proto(skb, iph, thoff, addr, new_addr);
|
|
+}
|
|
+
|
|
+static int nf_flow_nat_ip(const struct flow_offload *flow, struct sk_buff *skb,
|
|
+ enum flow_offload_tuple_dir dir)
|
|
+{
|
|
+ struct iphdr *iph = ip_hdr(skb);
|
|
+ unsigned int thoff = iph->ihl * 4;
|
|
+
|
|
+ if (flow->flags & FLOW_OFFLOAD_SNAT &&
|
|
+ (nf_flow_snat_port(flow, skb, thoff, iph->protocol, dir) < 0 ||
|
|
+ nf_flow_snat_ip(flow, skb, iph, thoff, dir) < 0))
|
|
+ return -1;
|
|
+ if (flow->flags & FLOW_OFFLOAD_DNAT &&
|
|
+ (nf_flow_dnat_port(flow, skb, thoff, iph->protocol, dir) < 0 ||
|
|
+ nf_flow_dnat_ip(flow, skb, iph, thoff, dir) < 0))
|
|
+ return -1;
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+static bool ip_has_options(unsigned int thoff)
|
|
+{
|
|
+ return thoff != sizeof(struct iphdr);
|
|
+}
|
|
+
|
|
+static int nf_flow_tuple_ip(struct sk_buff *skb, const struct net_device *dev,
|
|
+ struct flow_offload_tuple *tuple)
|
|
+{
|
|
+ struct flow_ports *ports;
|
|
+ unsigned int thoff;
|
|
+ struct iphdr *iph;
|
|
+
|
|
+ if (!pskb_may_pull(skb, sizeof(*iph)))
|
|
+ return -1;
|
|
+
|
|
+ iph = ip_hdr(skb);
|
|
+ thoff = iph->ihl * 4;
|
|
+
|
|
+ if (ip_is_fragment(iph) ||
|
|
+ unlikely(ip_has_options(thoff)))
|
|
+ return -1;
|
|
+
|
|
+ if (iph->protocol != IPPROTO_TCP &&
|
|
+ iph->protocol != IPPROTO_UDP)
|
|
+ return -1;
|
|
+
|
|
+ thoff = iph->ihl * 4;
|
|
+ if (!pskb_may_pull(skb, thoff + sizeof(*ports)))
|
|
+ return -1;
|
|
+
|
|
+ ports = (struct flow_ports *)(skb_network_header(skb) + thoff);
|
|
+
|
|
+ tuple->src_v4.s_addr = iph->saddr;
|
|
+ tuple->dst_v4.s_addr = iph->daddr;
|
|
+ tuple->src_port = ports->source;
|
|
+ tuple->dst_port = ports->dest;
|
|
+ tuple->l3proto = AF_INET;
|
|
+ tuple->l4proto = iph->protocol;
|
|
+ tuple->iifidx = dev->ifindex;
|
|
+
|
|
+ return 0;
|
|
+}
|
|
+
|
|
+/* Based on ip_exceeds_mtu(). */
|
|
+static bool nf_flow_exceeds_mtu(const struct sk_buff *skb, unsigned int mtu)
|
|
+{
|
|
+ if (skb->len <= mtu)
|
|
+ return false;
|
|
+
|
|
+ if ((ip_hdr(skb)->frag_off & htons(IP_DF)) == 0)
|
|
+ return false;
|
|
+
|
|
+ if (skb_is_gso(skb) && skb_gso_validate_mtu(skb, mtu))
|
|
+ return false;
|
|
+
|
|
+ return true;
|
|
+}
|
|
+
|
|
+unsigned int
|
|
+nf_flow_offload_ip_hook(void *priv, struct sk_buff *skb,
|
|
+ const struct nf_hook_state *state)
|
|
+{
|
|
+ struct flow_offload_tuple_rhash *tuplehash;
|
|
+ struct nf_flowtable *flow_table = priv;
|
|
+ struct flow_offload_tuple tuple = {};
|
|
+ enum flow_offload_tuple_dir dir;
|
|
+ struct flow_offload *flow;
|
|
+ struct net_device *outdev;
|
|
+ const struct rtable *rt;
|
|
+ struct iphdr *iph;
|
|
+ __be32 nexthop;
|
|
+
|
|
+ if (skb->protocol != htons(ETH_P_IP))
|
|
+ return NF_ACCEPT;
|
|
+
|
|
+ if (nf_flow_tuple_ip(skb, state->in, &tuple) < 0)
|
|
+ return NF_ACCEPT;
|
|
+
|
|
+ tuplehash = flow_offload_lookup(flow_table, &tuple);
|
|
+ if (tuplehash == NULL)
|
|
+ return NF_ACCEPT;
|
|
+
|
|
+ outdev = dev_get_by_index_rcu(state->net, tuplehash->tuple.oifidx);
|
|
+ if (!outdev)
|
|
+ return NF_ACCEPT;
|
|
+
|
|
+ dir = tuplehash->tuple.dir;
|
|
+ flow = container_of(tuplehash, struct flow_offload, tuplehash[dir]);
|
|
+ rt = (const struct rtable *)flow->tuplehash[dir].tuple.dst_cache;
|
|
+
|
|
+ if (unlikely(nf_flow_exceeds_mtu(skb, flow->tuplehash[dir].tuple.mtu)))
|
|
+ return NF_ACCEPT;
|
|
+
|
|
+ if (skb_try_make_writable(skb, sizeof(*iph)))
|
|
+ return NF_DROP;
|
|
+
|
|
+ if (flow->flags & (FLOW_OFFLOAD_SNAT | FLOW_OFFLOAD_DNAT) &&
|
|
+ nf_flow_nat_ip(flow, skb, dir) < 0)
|
|
+ return NF_DROP;
|
|
+
|
|
+ flow->timeout = (u32)jiffies + NF_FLOW_TIMEOUT;
|
|
+ iph = ip_hdr(skb);
|
|
+ ip_decrease_ttl(iph);
|
|
+
|
|
+ skb->dev = outdev;
|
|
+ nexthop = rt_nexthop(rt, flow->tuplehash[!dir].tuple.src_v4.s_addr);
|
|
+ neigh_xmit(NEIGH_ARP_TABLE, outdev, &nexthop, skb);
|
|
+
|
|
+ return NF_STOLEN;
|
|
+}
|
|
+EXPORT_SYMBOL_GPL(nf_flow_offload_ip_hook);
|
|
|