2 * gre.h: types/functions for gre.
4 * Copyright (c) 2012 Cisco and/or its affiliates.
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at:
9 * http://www.apache.org/licenses/LICENSE-2.0
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
18 #ifndef included_gre_h
19 #define included_gre_h
21 #include <vnet/vnet.h>
22 #include <vnet/gre/packet.h>
23 #include <vnet/ip/ip.h>
24 #include <vnet/ip/ip4.h>
25 #include <vnet/ip/ip4_packet.h>
26 #include <vnet/pg/pg.h>
27 #include <vnet/ip/format.h>
29 extern vnet_hw_interface_class_t gre_hw_interface_class;
32 #define gre_error(n,s) GRE_ERROR_##n,
33 #include <vnet/gre/error.def>
39 /* Name (a c string). */
42 /* GRE protocol type in host byte order. */
43 gre_protocol_t protocol;
45 /* Node which handles this type. */
48 /* Next index for this type. */
50 } gre_protocol_info_t;
53 ip4_address_t tunnel_src;
54 ip4_address_t tunnel_dst;
62 /* pool of tunnel instances */
63 gre_tunnel_t *tunnels;
65 gre_protocol_info_t * protocol_infos;
67 /* Hash tables mapping name/protocol to protocol info index. */
68 uword * protocol_info_by_name, * protocol_info_by_protocol;
69 /* Hash mapping src/dst addr pair to tunnel */
70 uword * tunnel_by_key;
72 /* Free vlib hw_if_indices */
73 u32 * free_gre_tunnel_hw_if_indices;
75 /* Mapping from sw_if_index to tunnel index */
76 u32 * tunnel_index_by_sw_if_index;
79 vlib_main_t * vlib_main;
80 vnet_main_t * vnet_main;
83 always_inline gre_protocol_info_t *
84 gre_get_protocol_info (gre_main_t * em, gre_protocol_t protocol)
86 uword * p = hash_get (em->protocol_info_by_protocol, protocol);
87 return p ? vec_elt_at_index (em->protocol_infos, p[0]) : 0;
92 /* Register given node index to take input for given gre type. */
94 gre_register_input_type (vlib_main_t * vm,
95 gre_protocol_t protocol,
98 void gre_set_adjacency (vnet_rewrite_header_t * rw,
100 gre_protocol_t protocol);
102 format_function_t format_gre_protocol;
103 format_function_t format_gre_header;
104 format_function_t format_gre_header_with_length;
106 extern vlib_node_registration_t gre_input_node;
107 extern vnet_device_class_t gre_device_class;
109 /* Parse gre protocol as 0xXXXX or protocol name.
110 In either host or network byte order. */
111 unformat_function_t unformat_gre_protocol_host_byte_order;
112 unformat_function_t unformat_gre_protocol_net_byte_order;
114 /* Parse gre header. */
115 unformat_function_t unformat_gre_header;
116 unformat_function_t unformat_pg_gre_header;
119 gre_register_input_protocol (vlib_main_t * vm,
120 gre_protocol_t protocol,
123 /* manually added to the interface output node in gre.c */
124 #define GRE_OUTPUT_NEXT_LOOKUP 1
129 ip4_address_t src, dst;
132 } vnet_gre_add_del_tunnel_args_t;
134 int vnet_gre_add_del_tunnel
135 (vnet_gre_add_del_tunnel_args_t *a, u32 * sw_if_indexp);
137 #endif /* included_gre_h */