1 files changed, 118 insertions, 0 deletions
diff --git a/vnet/vnet/gre/gre.h b/vnet/vnet/gre/gre.h
new file mode 100644
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+++ b/vnet/vnet/gre/gre.h
@@ -0,0 +1,118 @@
+/*
+ * gre.h: types/functions for gre.
+ *
+ * Copyright (c) 2012 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.
+ */
+
+#ifndef included_gre_h
+#define included_gre_h
+
+#include <vnet/vnet.h>
+#include <vnet/gre/packet.h>
+#include <vnet/ip/ip.h>
+#include <vnet/ip/ip4.h>
+#include <vnet/ip/ip4_packet.h>
+#include <vnet/pg/pg.h>
+#include <vnet/ip/format.h>
+
+vnet_hw_interface_class_t gre_hw_interface_class;
+
+typedef enum {
+#define gre_error(n,s) GRE_ERROR_##n,
+#include <vnet/gre/error.def>
+#undef gre_error
+  GRE_N_ERROR,
+} gre_error_t;
+
+typedef struct {
+  /* Name (a c string). */
+  char * name;
+
+  /* GRE protocol type in host byte order. */
+  gre_protocol_t protocol;
+
+  /* Node which handles this type. */
+  u32 node_index;
+
+  /* Next index for this type. */
+  u32 next_index;
+} gre_protocol_info_t;
+
+typedef struct {
+  ip4_address_t tunnel_src;
+  ip4_address_t tunnel_dst;
+  u32 outer_fib_index;
+  u32 hw_if_index;
+} gre_tunnel_t;
+
+typedef struct {
+  /* pool of tunnel instances */
+  gre_tunnel_t *tunnels;
+
+  gre_protocol_info_t * protocol_infos;
+
+  /* Hash tables mapping name/protocol to protocol info index. */
+  uword * protocol_info_by_name, * protocol_info_by_protocol;
+  /* Hash mapping src/dst addr pair to tunnel */
+  uword * tunnel_by_key;
+
+  /* convenience */
+  vlib_main_t * vlib_main;
+  vnet_main_t * vnet_main;
+} gre_main_t;
+
+always_inline gre_protocol_info_t *
+gre_get_protocol_info (gre_main_t * em, gre_protocol_t protocol)
+{
+  uword * p = hash_get (em->protocol_info_by_protocol, protocol);
+  return p ? vec_elt_at_index (em->protocol_infos, p[0]) : 0;
+}
+
+gre_main_t gre_main;
+
+/* Register given node index to take input for given gre type. */
+void
+gre_register_input_type (vlib_main_t * vm,
+			 gre_protocol_t protocol,
+			 u32 node_index);
+
+void gre_set_adjacency (vnet_rewrite_header_t * rw,
+			uword max_data_bytes,
+			gre_protocol_t protocol);
+
+format_function_t format_gre_protocol;
+format_function_t format_gre_header;
+format_function_t format_gre_header_with_length;
+
+vlib_node_registration_t gre_input_node;
+vnet_device_class_t gre_device_class;
+
+/* Parse gre protocol as 0xXXXX or protocol name.
+   In either host or network byte order. */
+unformat_function_t unformat_gre_protocol_host_byte_order;
+unformat_function_t unformat_gre_protocol_net_byte_order;
+
+/* Parse gre header. */
+unformat_function_t unformat_gre_header;
+unformat_function_t unformat_pg_gre_header;
+
+void
+gre_register_input_protocol (vlib_main_t * vm,
+			     gre_protocol_t protocol,
+			     u32 node_index);
+
+/* manually added to the interface output node in gre.c */
+#define GRE_OUTPUT_NEXT_LOOKUP	1
+
+#endif /* included_gre_h */