FD.io VPP  v20.09-64-g4f7b92f0a
Vector Packet Processing
geneve.h
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1 /*
2  * Copyright (c) 2017 SUSE LLC.
3  * Licensed under the Apache License, Version 2.0 (the "License");
4  * you may not use this file except in compliance with the License.
5  * You may obtain a copy of the License at:
6  *
7  * http://www.apache.org/licenses/LICENSE-2.0
8  *
9  * Unless required by applicable law or agreed to in writing, software
10  * distributed under the License is distributed on an "AS IS" BASIS,
11  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12  * See the License for the specific language governing permissions and
13  * limitations under the License.
14  */
15 #ifndef included_vnet_geneve_h
16 #define included_vnet_geneve_h
17 
18 #include <vppinfra/error.h>
19 #include <vppinfra/hash.h>
20 #include <vnet/vnet.h>
21 #include <vnet/ip/ip.h>
22 #include <vnet/ip/vtep.h>
23 #include <vnet/l2/l2_input.h>
24 #include <vnet/l2/l2_output.h>
25 #include <vnet/l2/l2_bd.h>
26 #include <vnet/ethernet/ethernet.h>
28 #include <vnet/ip/ip4_packet.h>
29 #include <vnet/ip/ip6_packet.h>
30 #include <vnet/udp/udp.h>
31 #include <vnet/dpo/dpo.h>
32 #include <vnet/adj/adj_types.h>
33 
34 #define SUPPORT_OPTIONS_HEADER 0
35 
36 typedef CLIB_PACKED (struct
37  {
38  ip4_header_t ip4; /* 20 bytes */
39  udp_header_t udp; /* 8 bytes */
40  geneve_header_t geneve; /* Min 8 bytes, Max 260 bytes */
41  }) ip4_geneve_header_t;
42 
43 typedef CLIB_PACKED (struct
44  {
45  ip6_header_t ip6; /* 40 bytes */
46  udp_header_t udp; /* 8 bytes */
47  geneve_header_t geneve; /* Min 8 bytes, Max 260 bytes */
48  }) ip6_geneve_header_t;
49 
50 typedef CLIB_PACKED (struct
51  {
52  /*
53  * Key fields: ip source and geneve vni on incoming GENEVE packet
54  * all fields in NET byte order
55  */
56  union
57  {
58  struct
59  {
60  u32 remote;
61  u32 vni; /* shifted left 8 bits */
62  };
63  u64 as_u64;
64  };
65  }) geneve4_tunnel_key_t;
66 
67 typedef CLIB_PACKED (struct
68  {
69  /*
70  * Key fields: ip source and geneve vni on incoming GENEVE packet
71  * all fields in NET byte order
72  */
73  ip6_address_t remote;
74  u32 vni; /* shifted left 8 bits */
75  }) geneve6_tunnel_key_t;
76 
77 typedef struct
78 {
82 
83 typedef struct
84 {
85  /* Required for pool_get_aligned */
86  CLIB_CACHE_LINE_ALIGN_MARK (cacheline0);
87 
88  /* Rewrite string. $$$$ embed vnet_rewrite header */
90 
91  /* FIB DPO for IP forwarding of GENEVE encap packet */
93 
94  /* geneve VNI in HOST byte order */
96 
97  /* geneve OPTIONS LEN in HOST byte order */
98 #if SUPPORT_OPTIONS_HEADER==1
99  u8 options_len;
100 #endif
101 
102  /* tunnel local and remote addresses */
103  ip46_address_t local;
104  ip46_address_t remote;
105 
106  /* mcast packet output intfc index (used only if remote is mcast) */
108 
109  /* decap next index */
111 
112  /* The FIB index for local/remote addresses */
114 
115  /* vnet intfc index */
118 
119  /**
120  * Linkage into the FIB object graph
121  */
123 
124  /*
125  * The FIB entry for (depending on GENEVE tunnel is unicast or mcast)
126  * sending unicast GENEVE encap packets or receiving mcast GENEVE packets
127  */
130 
131  /**
132  * The tunnel is a child of the FIB entry for its desintion. This is
133  * so it receives updates when the forwarding information for that entry
134  * changes.
135  * The tunnels sibling index on the FIB entry's dependency list.
136  */
138 
141 
142 #define foreach_geneve_input_next \
143 _(DROP, "error-drop") \
144 _(L2_INPUT, "l2-input")
145 
146 typedef enum
147 {
148 #define _(s,n) GENEVE_INPUT_NEXT_##s,
150 #undef _
153 
154 typedef enum
155 {
156 #define geneve_error(n,s) GENEVE_ERROR_##n,
158 #undef geneve_error
161 
162 typedef struct
163 {
164  /* vector of encap tunnel instances */
166 
167  /* lookup tunnel by key */
168  uword *geneve4_tunnel_by_key; /* keyed on ipv4.remote + vni */
169  uword *geneve6_tunnel_by_key; /* keyed on ipv6.remote + vni */
170 
171  /* local VTEP IPs ref count used by geneve-bypass node to check if
172  received GENEVE packet DIP matches any local VTEP address */
174 
175  /* mcast shared info */
176  uword *mcast_shared; /* keyed on mcast ip46 addr */
177 
178  /* Mapping from sw_if_index to tunnel index */
180 
181  /* convenience */
184 } geneve_main_t;
185 
187 
192 
193 u8 *format_geneve_encap_trace (u8 * s, va_list * args);
194 
195 typedef struct
196 {
198 
199  /* we normally use is_ip4, but since this adds to the
200  * structure, this seems less of abreaking change */
202  ip46_address_t local, remote;
209 
211  (vnet_geneve_add_del_tunnel_args_t * a, u32 * sw_if_indexp);
212 
214 #endif /* included_vnet_geneve_h */
215 
216 /*
217  * fd.io coding-style-patch-verification: ON
218  *
219  * Local Variables:
220  * eval: (c-set-style "gnu")
221  * End:
222  */
vlib_main_t * vlib_main
Definition: geneve.h:182
u16 vni
Definition: flow_types.api:160
#define CLIB_CACHE_LINE_ALIGN_MARK(mark)
Definition: cache.h:60
u32 hw_if_index
Definition: geneve.h:117
a
Definition: bitmap.h:538
u64 as_u64
Definition: bihash_doc.h:63
unsigned long u64
Definition: types.h:89
void vnet_int_geneve_bypass_mode(u32 sw_if_index, u8 is_ip6, u8 is_enable)
Definition: geneve.c:923
u32 decap_next_index
Definition: geneve.h:110
geneve_input_error_t
Definition: geneve.h:154
fib_node_t node
Linkage into the FIB object graph.
Definition: geneve.h:122
u8 * format_geneve_encap_trace(u8 *s, va_list *args)
Definition: geneve.c:42
u32 mcast_sw_if_index
Definition: geneve.h:107
dpo_id_t next_dpo
Definition: geneve.h:92
uword * mcast_shared
Definition: geneve.h:176
u32 * tunnel_index_by_sw_if_index
Definition: geneve.h:179
unsigned char u8
Definition: types.h:56
geneve_tunnel_t * tunnels
Definition: geneve.h:165
geneve_input_next_t
Definition: geneve.h:146
u8 * rewrite
Definition: geneve.h:89
vl_api_ip6_address_t ip6
Definition: one.api:424
#define foreach_geneve_input_next
Definition: geneve.h:142
vtep_table_t vtep_table
Definition: geneve.h:173
unsigned int u32
Definition: types.h:88
bool is_ip6
Definition: ip.api:43
vlib_node_registration_t geneve6_encap_node
(constructor) VLIB_REGISTER_NODE (geneve6_encap_node)
Definition: encap.c:561
The identity of a DPO is a combination of its type and its instance number/index of objects of that t...
Definition: dpo.h:170
u32 encap_fib_index
Definition: geneve.h:113
vl_api_ip4_address_t ip4
Definition: one.api:376
An node in the FIB graph.
Definition: fib_node.h:295
ip46_address_t local
Definition: geneve.h:103
vlib_node_registration_t geneve4_input_node
(constructor) VLIB_REGISTER_NODE (geneve4_input_node)
Definition: decap.c:816
u32 fib_node_index_t
A typedef of a node index.
Definition: fib_types.h:30
u32 adj_index_t
An index for adjacencies.
Definition: adj_types.h:30
uword * geneve4_tunnel_by_key
Definition: geneve.h:168
u32 sw_if_index
Definition: geneve.h:116
adj_index_t mcast_adj_index
Definition: geneve.h:129
u32 sibling_index
The tunnel is a child of the FIB entry for its desintion.
Definition: geneve.h:137
vnet_main_t * vnet_main
Definition: geneve.h:183
struct _vlib_node_registration vlib_node_registration_t
ip46_address_t remote
Definition: geneve.h:104
vlib_node_registration_t geneve4_encap_node
(constructor) VLIB_REGISTER_NODE (geneve4_encap_node)
Definition: encap.c:548
int vnet_geneve_add_del_tunnel(vnet_geneve_add_del_tunnel_args_t *a, u32 *sw_if_indexp)
Definition: geneve.c:351
u64 uword
Definition: types.h:112
uword * geneve6_tunnel_by_key
Definition: geneve.h:169
vlib_node_registration_t geneve6_input_node
(constructor) VLIB_REGISTER_NODE (geneve6_input_node)
Definition: decap.c:834
fib_node_index_t fib_entry_index
Definition: geneve.h:128
geneve_main_t geneve_main
Definition: geneve.c:39
vl_api_interface_index_t sw_if_index
Definition: wireguard.api:33
typedef CLIB_PACKED(struct { ip4_header_t ip4;udp_header_t udp;geneve_header_t geneve;}) ip4_geneve_header_t