FD.io VPP  v18.04-17-g3a0d853
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/l2/l2_input.h>
23 #include <vnet/l2/l2_output.h>
24 #include <vnet/l2/l2_bd.h>
25 #include <vnet/ethernet/ethernet.h>
27 #include <vnet/ip/ip4_packet.h>
28 #include <vnet/ip/ip6_packet.h>
29 #include <vnet/udp/udp.h>
30 #include <vnet/dpo/dpo.h>
31 #include <vnet/adj/adj_types.h>
32 
33 #define SUPPORT_OPTIONS_HEADER 0
34 
35 typedef CLIB_PACKED (struct
36  {
37  ip4_header_t ip4; /* 20 bytes */
38  udp_header_t udp; /* 8 bytes */
39  geneve_header_t geneve; /* Min 8 bytes, Max 260 bytes */
40  }) ip4_geneve_header_t;
41 
42 typedef CLIB_PACKED (struct
43  {
44  ip6_header_t ip6; /* 40 bytes */
45  udp_header_t udp; /* 8 bytes */
46  geneve_header_t geneve; /* Min 8 bytes, Max 260 bytes */
47  }) ip6_geneve_header_t;
48 
49 typedef CLIB_PACKED (struct
50  {
51  /*
52  * Key fields: ip source and geneve vni on incoming GENEVE packet
53  * all fields in NET byte order
54  */
55  union
56  {
57  struct
58  {
59  u32 remote;
60  u32 vni; /* shifted left 8 bits */
61  };
62  u64 as_u64;
63  };
64  }) geneve4_tunnel_key_t;
65 
66 typedef CLIB_PACKED (struct
67  {
68  /*
69  * Key fields: ip source and geneve vni on incoming GENEVE packet
70  * all fields in NET byte order
71  */
72  ip6_address_t remote;
73  u32 vni; /* shifted left 8 bits */
74  }) geneve6_tunnel_key_t;
75 
76 typedef struct
77 {
78  /* Required for pool_get_aligned */
79  CLIB_CACHE_LINE_ALIGN_MARK (cacheline0);
80 
81  /* Rewrite string. $$$$ embed vnet_rewrite header */
83 
84  /* FIB DPO for IP forwarding of GENEVE encap packet */
86 
87  /* geneve VNI in HOST byte order */
89 
90  /* geneve OPTIONS LEN in HOST byte order */
91 #if SUPPORT_OPTIONS_HEADER==1
92  u8 options_len;
93 #endif
94 
95  /* tunnel local and remote addresses */
96  ip46_address_t local;
97  ip46_address_t remote;
98 
99  /* mcast packet output intfc index (used only if remote is mcast) */
101 
102  /* decap next index */
104 
105  /* The FIB index for local/remote addresses */
107 
108  /* vnet intfc index */
111 
112  /**
113  * Linkage into the FIB object graph
114  */
116 
117  /*
118  * The FIB entry for (depending on GENEVE tunnel is unicast or mcast)
119  * sending unicast GENEVE encap packets or receiving mcast GENEVE packets
120  */
123 
124  /**
125  * The tunnel is a child of the FIB entry for its desintion. This is
126  * so it receives updates when the forwarding information for that entry
127  * changes.
128  * The tunnels sibling index on the FIB entry's dependency list.
129  */
132 
133 #define foreach_geneve_input_next \
134 _(DROP, "error-drop") \
135 _(L2_INPUT, "l2-input")
136 
137 typedef enum
138 {
139 #define _(s,n) GENEVE_INPUT_NEXT_##s,
141 #undef _
144 
145 typedef enum
146 {
147 #define geneve_error(n,s) GENEVE_ERROR_##n,
149 #undef geneve_error
152 
153 typedef struct
154 {
155  /* vector of encap tunnel instances */
157 
158  /* lookup tunnel by key */
159  uword *geneve4_tunnel_by_key; /* keyed on ipv4.remote + vni */
160  uword *geneve6_tunnel_by_key; /* keyed on ipv6.remote + vni */
161 
162  /* local VTEP IPs ref count used by geneve-bypass node to check if
163  received GENEVE packet DIP matches any local VTEP address */
164  uword *vtep4; /* local ip4 VTEPs keyed on their ip4 addr */
165  uword *vtep6; /* local ip6 VTEPs keyed on their ip6 addr */
166 
167  /* mcast shared info */
168  uword *mcast_shared; /* keyed on mcast ip46 addr */
169 
170  /* Free vlib hw_if_indices */
172 
173  /* Mapping from sw_if_index to tunnel index */
175 
176  /* convenience */
179 } geneve_main_t;
180 
182 
187 
188 u8 *format_geneve_encap_trace (u8 * s, va_list * args);
189 
190 typedef struct
191 {
193 
194  /* we normally use is_ip4, but since this adds to the
195  * structure, this seems less of abreaking change */
197  ip46_address_t local, remote;
203 
205  (vnet_geneve_add_del_tunnel_args_t * a, u32 * sw_if_indexp);
206 
207 void vnet_int_geneve_bypass_mode (u32 sw_if_index, u8 is_ip6, u8 is_enable);
208 #endif /* included_vnet_geneve_h */
209 
210 /*
211  * fd.io coding-style-patch-verification: ON
212  *
213  * Local Variables:
214  * eval: (c-set-style "gnu")
215  * End:
216  */
vlib_main_t * vlib_main
Definition: geneve.h:177
#define CLIB_CACHE_LINE_ALIGN_MARK(mark)
Definition: cache.h:60
u32 hw_if_index
Definition: geneve.h:110
a
Definition: bitmap.h:516
u64 as_u64
Definition: bihash_doc.h:63
u32 * free_geneve_tunnel_hw_if_indices
Definition: geneve.h:171
void vnet_int_geneve_bypass_mode(u32 sw_if_index, u8 is_ip6, u8 is_enable)
Definition: geneve.c:920
u32 decap_next_index
Definition: geneve.h:103
geneve_input_error_t
Definition: geneve.h:145
fib_node_t node
Linkage into the FIB object graph.
Definition: geneve.h:115
u8 * format_geneve_encap_trace(u8 *s, va_list *args)
Definition: encap.c:53
u32 mcast_sw_if_index
Definition: geneve.h:100
uword * vtep6
Definition: geneve.h:165
dpo_id_t next_dpo
Definition: geneve.h:85
uword * mcast_shared
Definition: geneve.h:168
u32 * tunnel_index_by_sw_if_index
Definition: geneve.h:174
geneve_tunnel_t * tunnels
Definition: geneve.h:156
geneve_input_next_t
Definition: geneve.h:137
u8 * rewrite
Definition: geneve.h:82
#define foreach_geneve_input_next
Definition: geneve.h:133
unsigned long u64
Definition: types.h:89
typedef CLIB_PACKED(struct{ip4_header_t ip4;udp_header_t udp;geneve_header_t geneve;}) ip4_geneve_header_t
vlib_node_registration_t geneve6_encap_node
(constructor) VLIB_REGISTER_NODE (geneve6_encap_node)
Definition: encap.c:577
The identity of a DPO is a combination of its type and its instance number/index of objects of that t...
Definition: dpo.h:168
u32 encap_fib_index
Definition: geneve.h:106
An node in the FIB graph.
Definition: fib_node.h:286
uword * vtep4
Definition: geneve.h:164
ip46_address_t local
Definition: geneve.h:96
vlib_node_registration_t geneve4_input_node
(constructor) VLIB_REGISTER_NODE (geneve4_input_node)
Definition: decap.c:20
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:159
u32 sw_if_index
Definition: geneve.h:109
unsigned int u32
Definition: types.h:88
adj_index_t mcast_adj_index
Definition: geneve.h:122
u32 sibling_index
The tunnel is a child of the FIB entry for its desintion.
Definition: geneve.h:130
u64 uword
Definition: types.h:112
vnet_main_t * vnet_main
Definition: geneve.h:178
struct _vlib_node_registration vlib_node_registration_t
ip46_address_t remote
Definition: geneve.h:97
vlib_node_registration_t geneve4_encap_node
(constructor) VLIB_REGISTER_NODE (geneve4_encap_node)
Definition: encap.c:561
unsigned char u8
Definition: types.h:56
int vnet_geneve_add_del_tunnel(vnet_geneve_add_del_tunnel_args_t *a, u32 *sw_if_indexp)
Definition: geneve.c:355
uword * geneve6_tunnel_by_key
Definition: geneve.h:160
vlib_node_registration_t geneve6_input_node
(constructor) VLIB_REGISTER_NODE (geneve6_input_node)
Definition: decap.c:21
fib_node_index_t fib_entry_index
Definition: geneve.h:121
geneve_main_t geneve_main
Definition: geneve.c:38