NAT: DS-Lite (VPP-1040)

Dual-Stack Lite enables a broadband service provider to share IPv4 addresses among customers by combining two well-known technologies: IPv4-in-IPv6 and NAT.

Change-Id: I039740f8548c623cd1ac89b8ecda1a6cc4aafb9c
Signed-off-by: Matus Fabian <matfabia@cisco.com>

1 files changed, 80 insertions, 0 deletions

diff --git a/src/plugins/nat/dslite_dpo.c b/src/plugins/nat/dslite_dpo.c
new file mode 100644
index 00000000000..376d7174858
--- /dev/null
+++ b/src/plugins/nat/dslite_dpo.c
@@ -0,0 +1,80 @@
+/*
+ * Copyright (c) 2017 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <vnet/ip/ip.h>
+#include <nat/dslite_dpo.h>
+
+dpo_type_t dslite_dpo_type;
+
+void
+dslite_dpo_create (dpo_proto_t dproto, u32 aftr_index, dpo_id_t * dpo)
+{
+  dpo_set (dpo, dslite_dpo_type, dproto, aftr_index);
+}
+
+u8 *
+format_dslite_dpo (u8 * s, va_list * args)
+{
+  index_t index = va_arg (*args, index_t);
+  CLIB_UNUSED (u32 indent) = va_arg (*args, u32);
+
+  return (format (s, "DS-Lite: AFTR:%d", index));
+}
+
+static void
+dslite_dpo_lock (dpo_id_t * dpo)
+{
+}
+
+static void
+dslite_dpo_unlock (dpo_id_t * dpo)
+{
+}
+
+const static dpo_vft_t dslite_dpo_vft = {
+  .dv_lock = dslite_dpo_lock,
+  .dv_unlock = dslite_dpo_unlock,
+  .dv_format = format_dslite_dpo,
+};
+
+const static char *const dslite_ip4_nodes[] = {
+  "dslite-out2in",
+  NULL,
+};
+
+const static char *const dslite_ip6_nodes[] = {
+  "dslite-in2out",
+  NULL,
+};
+
+const static char *const *const dslite_nodes[DPO_PROTO_NUM] = {
+  [DPO_PROTO_IP4] = dslite_ip4_nodes,
+  [DPO_PROTO_IP6] = dslite_ip6_nodes,
+  [DPO_PROTO_MPLS] = NULL,
+};
+
+void
+dslite_dpo_module_init (void)
+{
+  dslite_dpo_type = dpo_register_new_type (&dslite_dpo_vft, dslite_nodes);
+}
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */