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Vector Packet Processing
gtpu.h
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1 /*
2  *------------------------------------------------------------------
3  * Copyright (c) 2017 Intel and/or its affiliates.
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at:
7  *
8  * http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  *------------------------------------------------------------------
16  */
17 
18 #ifndef included_vnet_gtpu_h
19 #define included_vnet_gtpu_h
20 
21 #include <vppinfra/lock.h>
22 #include <vppinfra/error.h>
23 #include <vppinfra/hash.h>
24 #include <vnet/vnet.h>
25 #include <vnet/ip/ip.h>
26 #include <vnet/l2/l2_input.h>
27 #include <vnet/l2/l2_output.h>
28 #include <vnet/l2/l2_bd.h>
29 #include <vnet/ethernet/ethernet.h>
30 #include <vnet/ip/ip4_packet.h>
31 #include <vnet/ip/ip6_packet.h>
32 #include <vnet/udp/udp.h>
33 #include <vnet/dpo/dpo.h>
34 #include <vnet/adj/adj_types.h>
35 #include <vnet/fib/fib_table.h>
36 
37 /**
38  * Bits
39  * Octets 8 7 6 5 4 3 2 1
40  * 1 Version PT (*) E S PN
41  * 2 Message Type
42  * 3 Length (1st Octet)
43  * 4 Length (2nd Octet)
44  * 5 Tunnel Endpoint Identifier (1st Octet)
45  * 6 Tunnel Endpoint Identifier (2nd Octet)
46  * 7 Tunnel Endpoint Identifier (3rd Octet)
47  * 8 Tunnel Endpoint Identifier (4th Octet)
48  * 9 Sequence Number (1st Octet)1) 4)
49  * 10 Sequence Number (2nd Octet)1) 4)
50  * 11 N-PDU Number2) 4)
51  * 12 Next Extension Header Type3) 4)
52 **/
53 
54 typedef struct
55 {
58  u16 length; /* length in octets of the payload */
64 
65 #define GTPU_VER_MASK (7<<5)
66 #define GTPU_PT_BIT (1<<4)
67 #define GTPU_E_BIT (1<<2)
68 #define GTPU_S_BIT (1<<1)
69 #define GTPU_PN_BIT (1<<0)
70 #define GTPU_E_S_PN_BIT (7<<0)
71 
72 #define GTPU_V1_VER (1<<5)
73 
74 #define GTPU_PT_GTP (1<<4)
75 #define GTPU_TYPE_GTPU 255
76 
77 /* *INDENT-OFF* */
78 typedef CLIB_PACKED(struct
79 {
80  ip4_header_t ip4; /* 20 bytes */
81  udp_header_t udp; /* 8 bytes */
82  gtpu_header_t gtpu; /* 8 bytes */
83 }) ip4_gtpu_header_t;
84 /* *INDENT-ON* */
85 
86 /* *INDENT-OFF* */
87 typedef CLIB_PACKED(struct
88 {
89  ip6_header_t ip6; /* 40 bytes */
90  udp_header_t udp; /* 8 bytes */
91  gtpu_header_t gtpu; /* 8 bytes */
92 }) ip6_gtpu_header_t;
93 /* *INDENT-ON* */
94 
95 /* *INDENT-OFF* */
96 typedef CLIB_PACKED
97 (struct {
98  /*
99  * Key fields: ip src and gtpu teid on incoming gtpu packet
100  * all fields in NET byte order
101  */
102  union {
103  struct {
104  u32 src;
105  u32 teid;
106  };
107  u64 as_u64;
108  };
109 }) gtpu4_tunnel_key_t;
110 /* *INDENT-ON* */
111 
112 /* *INDENT-OFF* */
113 typedef CLIB_PACKED
114 (struct {
115  /*
116  * Key fields: ip src and gtpu teid on incoming gtpu packet
117  * all fields in NET byte order
118  */
119  ip6_address_t src;
120  u32 teid;
121 }) gtpu6_tunnel_key_t;
122 /* *INDENT-ON* */
123 
124 typedef struct
125 {
126  /* Rewrite string */
128 
129  /* FIB DPO for IP forwarding of gtpu encap packet */
131 
132  /* gtpu teid in HOST byte order */
134 
135  /* tunnel src and dst addresses */
136  ip46_address_t src;
137  ip46_address_t dst;
138 
139  /* mcast packet output intf index (used only if dst is mcast) */
141 
142  /* decap next index */
144 
145  /* The FIB index for src/dst addresses */
147 
148  /* vnet intfc index */
151 
152  /**
153  * Linkage into the FIB object graph
154  */
156 
157  /*
158  * The FIB entry for (depending on gtpu tunnel is unicast or mcast)
159  * sending unicast gtpu encap packets or receiving mcast gtpu packets
160  */
163 
164  /**
165  * The tunnel is a child of the FIB entry for its destination. This is
166  * so it receives updates when the forwarding information for that entry
167  * changes.
168  * The tunnels sibling index on the FIB entry's dependency list.
169  */
171 } gtpu_tunnel_t;
172 
173 #define foreach_gtpu_input_next \
174 _(DROP, "error-drop") \
175 _(L2_INPUT, "l2-input") \
176 _(IP4_INPUT, "ip4-input") \
177 _(IP6_INPUT, "ip6-input" )
178 
179 typedef enum
180 {
181 #define _(s,n) GTPU_INPUT_NEXT_##s,
183 #undef _
186 
187 typedef enum
188 {
189 #define gtpu_error(n,s) GTPU_ERROR_##n,
190 #include <gtpu/gtpu_error.def>
191 #undef gtpu_error
194 
195 typedef struct
196 {
197  /* vector of encap tunnel instances */
199 
200  /* lookup tunnel by key */
201  uword *gtpu4_tunnel_by_key; /* keyed on ipv4.dst + teid */
202  uword *gtpu6_tunnel_by_key; /* keyed on ipv6.dst + teid */
203 
204  /* local VTEP IPs ref count used by gtpu-bypass node to check if
205  received gtpu packet DIP matches any local VTEP address */
206  uword *vtep4; /* local ip4 VTEPs keyed on their ip4 addr */
207  uword *vtep6; /* local ip6 VTEPs keyed on their ip6 addr */
208 
209  /* mcast shared info */
210  uword *mcast_shared; /* keyed on mcast ip46 addr */
211 
212  /* Free vlib hw_if_indices */
214 
215  /* Mapping from sw_if_index to tunnel index */
217 
218  /**
219  * Node type for registering to fib changes.
220  */
222 
223  /* API message ID base */
225 
226  /* convenience */
229 } gtpu_main_t;
230 
232 
237 
238 u8 *format_gtpu_encap_trace (u8 * s, va_list * args);
239 
240 typedef struct
241 {
244  ip46_address_t src, dst;
250 
252  (vnet_gtpu_add_del_tunnel_args_t * a, u32 * sw_if_indexp);
253 
254 void vnet_int_gtpu_bypass_mode (u32 sw_if_index, u8 is_ip6, u8 is_enable);
255 #endif /* included_vnet_gtpu_h */
256 
257 
258 /*
259  * fd.io coding-style-patch-verification: ON
260  *
261  * Local Variables:
262  * eval: (c-set-style "gnu")
263  * End:
264  */
vlib_main_t * vlib_main
Definition: gtpu.h:227
vlib_node_registration_t gtpu4_encap_node
(constructor) VLIB_REGISTER_NODE (gtpu4_encap_node)
Definition: gtpu_encap.c:670
vnet_main_t * vnet_main
Definition: gtpu.h:228
enum fib_node_type_t_ fib_node_type_t
The types of nodes in a FIB graph.
a
Definition: bitmap.h:516
u32 teid
Definition: gtpu.h:59
u32 teid
Definition: gtpu.h:133
u64 as_u64
Definition: bihash_doc.h:63
u32 * tunnel_index_by_sw_if_index
Definition: gtpu.h:216
fib_node_type_t fib_node_type
Node type for registering to fib changes.
Definition: gtpu.h:221
void vnet_int_gtpu_bypass_mode(u32 sw_if_index, u8 is_ip6, u8 is_enable)
Definition: gtpu.c:941
struct _vlib_node_registration vlib_node_registration_t
gtpu_input_next_t
Definition: gtpu.h:179
u16 length
Definition: gtpu.h:58
uword * vtep4
Definition: gtpu.h:206
dpo_id_t next_dpo
Definition: gtpu.h:130
ip46_address_t src
Definition: gtpu.h:136
u16 msg_id_base
Definition: gtpu.h:224
unsigned long u64
Definition: types.h:89
u16 sequence
Definition: gtpu.h:60
The identity of a DPO is a combination of its type and its instance number/index of objects of that t...
Definition: dpo.h:150
u32 decap_next_index
Definition: gtpu.h:143
uword * vtep6
Definition: gtpu.h:207
gtpu_input_error_t
Definition: gtpu.h:187
typedef CLIB_PACKED(struct{ip4_header_t ip4;udp_header_t udp;gtpu_header_t gtpu;}) ip4_gtpu_header_t
adj_index_t mcast_adj_index
Definition: gtpu.h:162
An node in the FIB graph.
Definition: fib_node.h:279
ip46_address_t dst
Definition: gtpu.h:137
int vnet_gtpu_add_del_tunnel(vnet_gtpu_add_del_tunnel_args_t *a, u32 *sw_if_indexp)
Definition: gtpu.c:393
u8 type
Definition: gtpu.h:57
gtpu_main_t gtpu_main
Definition: gtpu.h:231
u32 fib_node_index_t
A typedef of a node index.
Definition: fib_types.h:28
u32 sw_if_index
Definition: gtpu.h:149
u32 adj_index_t
An index for adjacencies.
Definition: adj_types.h:30
u32 sibling_index
The tunnel is a child of the FIB entry for its destination.
Definition: gtpu.h:170
#define foreach_gtpu_input_next
Definition: gtpu.h:173
u32 * free_gtpu_tunnel_hw_if_indices
Definition: gtpu.h:213
fib_node_index_t fib_entry_index
Definition: gtpu.h:161
u8 * format_gtpu_encap_trace(u8 *s, va_list *args)
Definition: gtpu_encap.c:56
unsigned int u32
Definition: types.h:88
fib_node_t node
Linkage into the FIB object graph.
Definition: gtpu.h:155
u32 hw_if_index
Definition: gtpu.h:150
u32 encap_fib_index
Definition: gtpu.h:146
u8 pdu_number
Definition: gtpu.h:61
uword * gtpu4_tunnel_by_key
Definition: gtpu.h:201
u64 uword
Definition: types.h:112
vlib_node_registration_t gtpu6_input_node
(constructor) VLIB_REGISTER_NODE (gtpu6_input_node)
Definition: gtpu_decap.c:833
unsigned short u16
Definition: types.h:57
uword * mcast_shared
Definition: gtpu.h:210
unsigned char u8
Definition: types.h:56
uword * gtpu6_tunnel_by_key
Definition: gtpu.h:202
vlib_node_registration_t gtpu6_encap_node
(constructor) VLIB_REGISTER_NODE (gtpu6_encap_node)
Definition: gtpu_encap.c:688
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...
Definition: gtpu.h:54
u8 next_ext_type
Definition: gtpu.h:62
gtpu_tunnel_t * tunnels
Definition: gtpu.h:198
u8 * rewrite
Definition: gtpu.h:127
u8 ver_flags
Definition: gtpu.h:56
vlib_node_registration_t gtpu4_input_node
(constructor) VLIB_REGISTER_NODE (gtpu4_input_node)
Definition: gtpu_decap.c:810
u32 mcast_sw_if_index
Definition: gtpu.h:140