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Diffstat (limited to 'net/xfrm/xfrm_interface_core.c')
-rw-r--r--net/xfrm/xfrm_interface_core.c54
1 files changed, 50 insertions, 4 deletions
diff --git a/net/xfrm/xfrm_interface_core.c b/net/xfrm/xfrm_interface_core.c
index 1f99dc469027..35279c220bd7 100644
--- a/net/xfrm/xfrm_interface_core.c
+++ b/net/xfrm/xfrm_interface_core.c
@@ -310,6 +310,52 @@ static void xfrmi_scrub_packet(struct sk_buff *skb, bool xnet)
skb->mark = 0;
}
+static int xfrmi_input(struct sk_buff *skb, int nexthdr, __be32 spi,
+ int encap_type, unsigned short family)
+{
+ struct sec_path *sp;
+
+ sp = skb_sec_path(skb);
+ if (sp && (sp->len || sp->olen) &&
+ !xfrm_policy_check(NULL, XFRM_POLICY_IN, skb, family))
+ goto discard;
+
+ XFRM_SPI_SKB_CB(skb)->family = family;
+ if (family == AF_INET) {
+ XFRM_SPI_SKB_CB(skb)->daddroff = offsetof(struct iphdr, daddr);
+ XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip4 = NULL;
+ } else {
+ XFRM_SPI_SKB_CB(skb)->daddroff = offsetof(struct ipv6hdr, daddr);
+ XFRM_TUNNEL_SKB_CB(skb)->tunnel.ip6 = NULL;
+ }
+
+ return xfrm_input(skb, nexthdr, spi, encap_type);
+discard:
+ kfree_skb(skb);
+ return 0;
+}
+
+static int xfrmi4_rcv(struct sk_buff *skb)
+{
+ return xfrmi_input(skb, ip_hdr(skb)->protocol, 0, 0, AF_INET);
+}
+
+static int xfrmi6_rcv(struct sk_buff *skb)
+{
+ return xfrmi_input(skb, skb_network_header(skb)[IP6CB(skb)->nhoff],
+ 0, 0, AF_INET6);
+}
+
+static int xfrmi4_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type)
+{
+ return xfrmi_input(skb, nexthdr, spi, encap_type, AF_INET);
+}
+
+static int xfrmi6_input(struct sk_buff *skb, int nexthdr, __be32 spi, int encap_type)
+{
+ return xfrmi_input(skb, nexthdr, spi, encap_type, AF_INET6);
+}
+
static int xfrmi_rcv_cb(struct sk_buff *skb, int err)
{
const struct xfrm_mode *inner_mode;
@@ -945,8 +991,8 @@ static struct pernet_operations xfrmi_net_ops = {
};
static struct xfrm6_protocol xfrmi_esp6_protocol __read_mostly = {
- .handler = xfrm6_rcv,
- .input_handler = xfrm_input,
+ .handler = xfrmi6_rcv,
+ .input_handler = xfrmi6_input,
.cb_handler = xfrmi_rcv_cb,
.err_handler = xfrmi6_err,
.priority = 10,
@@ -996,8 +1042,8 @@ static struct xfrm6_tunnel xfrmi_ip6ip_handler __read_mostly = {
#endif
static struct xfrm4_protocol xfrmi_esp4_protocol __read_mostly = {
- .handler = xfrm4_rcv,
- .input_handler = xfrm_input,
+ .handler = xfrmi4_rcv,
+ .input_handler = xfrmi4_input,
.cb_handler = xfrmi_rcv_cb,
.err_handler = xfrmi4_err,
.priority = 10,