1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
|
/*
*------------------------------------------------------------------
* Copyright (c) 2017 Intel 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_vnet_gtpu_h
#define included_vnet_gtpu_h
#include <vppinfra/lock.h>
#include <vppinfra/error.h>
#include <vppinfra/hash.h>
#include <vnet/vnet.h>
#include <vnet/ip/ip.h>
#include <vnet/l2/l2_input.h>
#include <vnet/l2/l2_output.h>
#include <vnet/l2/l2_bd.h>
#include <vnet/ethernet/ethernet.h>
#include <vnet/ip/ip4_packet.h>
#include <vnet/ip/ip6_packet.h>
#include <vnet/udp/udp.h>
#include <vnet/dpo/dpo.h>
#include <vnet/adj/adj_types.h>
#include <vnet/fib/fib_table.h>
/**
* Bits
* Octets 8 7 6 5 4 3 2 1
* 1 Version PT (*) E S PN
* 2 Message Type
* 3 Length (1st Octet)
* 4 Length (2nd Octet)
* 5 Tunnel Endpoint Identifier (1st Octet)
* 6 Tunnel Endpoint Identifier (2nd Octet)
* 7 Tunnel Endpoint Identifier (3rd Octet)
* 8 Tunnel Endpoint Identifier (4th Octet)
* 9 Sequence Number (1st Octet)1) 4)
* 10 Sequence Number (2nd Octet)1) 4)
* 11 N-PDU Number2) 4)
* 12 Next Extension Header Type3) 4)
**/
typedef struct
{
u8 ver_flags;
u8 type;
u16 length; /* length in octets of the payload */
u32 teid;
u16 sequence;
u8 pdu_number;
u8 next_ext_type;
} gtpu_header_t;
#define GTPU_VER_MASK (7<<5)
#define GTPU_PT_BIT (1<<4)
#define GTPU_E_BIT (1<<2)
#define GTPU_S_BIT (1<<1)
#define GTPU_PN_BIT (1<<0)
#define GTPU_E_S_PN_BIT (7<<0)
#define GTPU_V1_VER (1<<5)
#define GTPU_PT_GTP (1<<4)
#define GTPU_TYPE_GTPU 255
/* *INDENT-OFF* */
typedef CLIB_PACKED(struct
{
ip4_header_t ip4; /* 20 bytes */
udp_header_t udp; /* 8 bytes */
gtpu_header_t gtpu; /* 8 bytes */
}) ip4_gtpu_header_t;
/* *INDENT-ON* */
/* *INDENT-OFF* */
typedef CLIB_PACKED(struct
{
ip6_header_t ip6; /* 40 bytes */
udp_header_t udp; /* 8 bytes */
gtpu_header_t gtpu; /* 8 bytes */
}) ip6_gtpu_header_t;
/* *INDENT-ON* */
/* *INDENT-OFF* */
typedef CLIB_PACKED
(struct {
/*
* Key fields: ip src and gtpu teid on incoming gtpu packet
* all fields in NET byte order
*/
union {
struct {
u32 src;
u32 teid;
};
u64 as_u64;
};
}) gtpu4_tunnel_key_t;
/* *INDENT-ON* */
/* *INDENT-OFF* */
typedef CLIB_PACKED
(struct {
/*
* Key fields: ip src and gtpu teid on incoming gtpu packet
* all fields in NET byte order
*/
ip6_address_t src;
u32 teid;
}) gtpu6_tunnel_key_t;
/* *INDENT-ON* */
typedef struct
{
/* Rewrite string */
u8 *rewrite;
/* FIB DPO for IP forwarding of gtpu encap packet */
dpo_id_t next_dpo;
/* gtpu teid in HOST byte order */
u32 teid;
/* tunnel src and dst addresses */
ip46_address_t src;
ip46_address_t dst;
/* mcast packet output intf index (used only if dst is mcast) */
u32 mcast_sw_if_index;
/* decap next index */
u32 decap_next_index;
/* The FIB index for src/dst addresses */
u32 encap_fib_index;
/* vnet intfc index */
u32 sw_if_index;
u32 hw_if_index;
/**
* Linkage into the FIB object graph
*/
fib_node_t node;
/*
* The FIB entry for (depending on gtpu tunnel is unicast or mcast)
* sending unicast gtpu encap packets or receiving mcast gtpu packets
*/
fib_node_index_t fib_entry_index;
adj_index_t mcast_adj_index;
/**
* The tunnel is a child of the FIB entry for its destination. This is
* so it receives updates when the forwarding information for that entry
* changes.
* The tunnels sibling index on the FIB entry's dependency list.
*/
u32 sibling_index;
} gtpu_tunnel_t;
#define foreach_gtpu_input_next \
_(DROP, "error-drop") \
_(L2_INPUT, "l2-input") \
_(IP4_INPUT, "ip4-input") \
_(IP6_INPUT, "ip6-input" )
typedef enum
{
#define _(s,n) GTPU_INPUT_NEXT_##s,
foreach_gtpu_input_next
#undef _
GTPU_INPUT_N_NEXT,
} gtpu_input_next_t;
typedef enum
{
#define gtpu_error(n,s) GTPU_ERROR_##n,
#include <gtpu/gtpu_error.def>
#undef gtpu_error
GTPU_N_ERROR,
} gtpu_input_error_t;
typedef struct
{
/* vector of encap tunnel instances */
gtpu_tunnel_t *tunnels;
/* lookup tunnel by key */
uword *gtpu4_tunnel_by_key; /* keyed on ipv4.dst + teid */
uword *gtpu6_tunnel_by_key; /* keyed on ipv6.dst + teid */
/* local VTEP IPs ref count used by gtpu-bypass node to check if
received gtpu packet DIP matches any local VTEP address */
uword *vtep4; /* local ip4 VTEPs keyed on their ip4 addr */
uword *vtep6; /* local ip6 VTEPs keyed on their ip6 addr */
/* mcast shared info */
uword *mcast_shared; /* keyed on mcast ip46 addr */
/* Free vlib hw_if_indices */
u32 *free_gtpu_tunnel_hw_if_indices;
/* Mapping from sw_if_index to tunnel index */
u32 *tunnel_index_by_sw_if_index;
/**
* Node type for registering to fib changes.
*/
fib_node_type_t fib_node_type;
/* API message ID base */
u16 msg_id_base;
/* convenience */
vlib_main_t *vlib_main;
vnet_main_t *vnet_main;
} gtpu_main_t;
extern gtpu_main_t gtpu_main;
extern vlib_node_registration_t gtpu4_input_node;
extern vlib_node_registration_t gtpu6_input_node;
extern vlib_node_registration_t gtpu4_encap_node;
extern vlib_node_registration_t gtpu6_encap_node;
u8 *format_gtpu_encap_trace (u8 * s, va_list * args);
typedef struct
{
u8 is_add;
u8 is_ip6;
ip46_address_t src, dst;
u32 mcast_sw_if_index;
u32 encap_fib_index;
u32 decap_next_index;
u32 teid;
} vnet_gtpu_add_del_tunnel_args_t;
int vnet_gtpu_add_del_tunnel
(vnet_gtpu_add_del_tunnel_args_t * a, u32 * sw_if_indexp);
void vnet_int_gtpu_bypass_mode (u32 sw_if_index, u8 is_ip6, u8 is_enable);
#endif /* included_vnet_gtpu_h */
/*
* fd.io coding-style-patch-verification: ON
*
* Local Variables:
* eval: (c-set-style "gnu")
* End:
*/
|
