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Vector Packet Processing
vxlan.h
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1 /*
2  * Copyright (c) 2015 Cisco and/or its affiliates.
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_vxlan_h
16 #define included_vnet_vxlan_h
17 
18 #include <vppinfra/error.h>
19 #include <vppinfra/hash.h>
20 #include <vppinfra/bihash_16_8.h>
21 #include <vppinfra/bihash_24_8.h>
22 #include <vnet/vnet.h>
23 #include <vnet/ip/ip.h>
24 #include <vnet/ip/vtep.h>
25 #include <vnet/l2/l2_input.h>
26 #include <vnet/l2/l2_output.h>
27 #include <vnet/l2/l2_bd.h>
28 #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 
36 /* *INDENT-OFF* */
37 typedef CLIB_PACKED (struct {
38  ip4_header_t ip4; /* 20 bytes */
39  udp_header_t udp; /* 8 bytes */
40  vxlan_header_t vxlan; /* 8 bytes */
41 }) ip4_vxlan_header_t;
42 
43 typedef CLIB_PACKED (struct {
44  ip6_header_t ip6; /* 40 bytes */
45  udp_header_t udp; /* 8 bytes */
46  vxlan_header_t vxlan; /* 8 bytes */
47 }) ip6_vxlan_header_t;
48 /* *INDENT-ON* */
49 
50 /*
51 * Key fields: remote ip, vni on incoming VXLAN packet
52 * all fields in NET byte order
53 */
55 
56 /*
57 * Key fields: remote ip, vni and fib index on incoming VXLAN packet
58 * ip, vni fields in NET byte order
59 * fib index field in host byte order
60 */
62 
63 typedef union
64 {
65  struct
66  {
67  u32 sw_if_index; /* unicast - input interface / mcast - stats interface */
68  union
69  {
70  struct /* unicast action */
71  {
74  };
75  ip4_address_t local_ip; /* used as dst ip for mcast pkts to assign them to unicast tunnel */
76  };
77  };
80 
81 typedef struct
82 {
83  /* Required for pool_get_aligned */
84  CLIB_CACHE_LINE_ALIGN_MARK (cacheline0);
85 
86  /* FIB DPO for IP forwarding of VXLAN encap packet */
88 
89  /* vxlan VNI in HOST byte order */
91 
92  /* tunnel src and dst addresses */
93  ip46_address_t src;
94  ip46_address_t dst;
95 
96  /* mcast packet output intfc index (used only if dst is mcast) */
98 
99  /* decap next index */
101 
102  /* The FIB index for src/dst addresses */
104 
105  /* vnet intfc index */
108 
109  /**
110  * Linkage into the FIB object graph
111  */
113 
114  /*
115  * The FIB entry for (depending on VXLAN tunnel is unicast or mcast)
116  * sending unicast VXLAN encap packets or receiving mcast VXLAN packets
117  */
120 
121  /**
122  * The tunnel is a child of the FIB entry for its destination. This is
123  * so it receives updates when the forwarding information for that entry
124  * changes.
125  * The tunnels sibling index on the FIB entry's dependency list.
126  */
128 
129  u32 flow_index; /* infra flow index */
130  u32 dev_instance; /* Real device instance in tunnel vector */
131  u32 user_instance; /* Instance name being shown to user */
132 
135 
136 #define foreach_vxlan_input_next \
137 _(DROP, "error-drop") \
138 _(L2_INPUT, "l2-input")
139 
140 typedef enum
141 {
142 #define _(s,n) VXLAN_INPUT_NEXT_##s,
144 #undef _
147 
148 typedef enum
149 {
150 #define vxlan_error(n,s) VXLAN_ERROR_##n,
152 #undef vxlan_error
155 
156 typedef struct
157 {
158  /* vector of encap tunnel instances */
160 
161  /* lookup tunnel by key */
162  clib_bihash_16_8_t vxlan4_tunnel_by_key; /* keyed on ipv4.dst + fib + vni */
163  clib_bihash_24_8_t vxlan6_tunnel_by_key; /* keyed on ipv6.dst + fib + vni */
164 
165  /* local VTEP IPs ref count used by vxlan-bypass node to check if
166  received VXLAN packet DIP matches any local VTEP address */
168 
169  /* mcast shared info */
170  uword *mcast_shared; /* keyed on mcast ip46 addr */
171 
172  /* Mapping from sw_if_index to tunnel index */
174 
175  /* graph node state */
178 
179  /* convenience */
182 
183  /* Record used instances */
186 } vxlan_main_t;
187 
188 extern vxlan_main_t vxlan_main;
189 
195 
196 u8 *format_vxlan_encap_trace (u8 * s, va_list * args);
197 
198 typedef struct
199 {
201 
202  /* we normally use is_ip4, but since this adds to the
203  * structure, this seems less of a breaking change */
206  ip46_address_t src, dst;
212 
214  (vnet_vxlan_add_del_tunnel_args_t * a, u32 * sw_if_indexp);
215 
217 
218 int vnet_vxlan_add_del_rx_flow (u32 hw_if_index, u32 t_imdex, int is_add);
219 
221 #endif /* included_vnet_vxlan_h */
222 
223 /*
224  * fd.io coding-style-patch-verification: ON
225  *
226  * Local Variables:
227  * eval: (c-set-style "gnu")
228  * End:
229  */
u32 user_instance
Definition: vxlan.h:131
#define CLIB_CACHE_LINE_ALIGN_MARK(mark)
Definition: cache.h:60
int vnet_vxlan_add_del_tunnel(vnet_vxlan_add_del_tunnel_args_t *a, u32 *sw_if_indexp)
Definition: vxlan.c:339
u32 sibling_index
The tunnel is a child of the FIB entry for its destination.
Definition: vxlan.h:127
clib_bihash_24_8_t vxlan6_tunnel_by_key
Definition: vxlan.h:163
a
Definition: bitmap.h:538
#define foreach_vxlan_input_next
Definition: vxlan.h:136
unsigned long u64
Definition: types.h:89
u32 flow_id_start
Definition: vxlan.h:185
vlib_node_registration_t vxlan4_encap_node
(constructor) VLIB_REGISTER_NODE (vxlan4_encap_node)
Definition: encap.c:482
uword * mcast_shared
Definition: vxlan.h:170
ip46_address_t dst
Definition: vxlan.h:94
vlib_node_registration_t vxlan4_input_node
(constructor) VLIB_REGISTER_NODE (vxlan4_input_node)
Definition: decap.c:23
unsigned char u8
Definition: types.h:56
clib_bihash_kv_16_8_t vxlan4_tunnel_key_t
Definition: vxlan.h:54
u8 * format_vxlan_encap_trace(u8 *s, va_list *args)
Definition: encap.c:53
vnet_main_t * vnet_main
Definition: vxlan.h:181
vl_api_interface_index_t sw_if_index
Definition: gre.api:53
vl_api_ip6_address_t ip6
Definition: one.api:424
vlib_main_t * vlib_main
Definition: vxlan.h:180
unsigned int u32
Definition: types.h:88
fib_node_t node
Linkage into the FIB object graph.
Definition: vxlan.h:112
bool is_ip6
Definition: ip.api:43
clib_bihash_kv_24_8_t vxlan6_tunnel_key_t
Definition: vxlan.h:61
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
vlib_node_registration_t vxlan4_flow_input_node
(constructor) VLIB_REGISTER_NODE (vxlan4_flow_input_node)
Definition: decap.c:1255
uword * bm_ip6_bypass_enabled_by_sw_if
Definition: vxlan.h:177
adj_index_t mcast_adj_index
Definition: vxlan.h:119
vlib_node_registration_t vxlan6_input_node
(constructor) VLIB_REGISTER_NODE (vxlan6_input_node)
Definition: decap.c:24
ip4_address_t local_ip
Definition: vxlan.h:75
unsigned short u16
Definition: types.h:57
int vnet_vxlan_add_del_rx_flow(u32 hw_if_index, u32 t_imdex, int is_add)
Definition: vxlan.c:1098
vl_api_ip4_address_t ip4
Definition: one.api:376
typedef CLIB_PACKED(struct { ip4_header_t ip4;udp_header_t udp;vxlan_header_t vxlan;}) ip4_vxlan_header_t
vlib_node_registration_t vxlan6_encap_node
(constructor) VLIB_REGISTER_NODE (vxlan6_encap_node)
Definition: encap.c:495
VNET_DECLARE_REWRITE
Definition: vxlan.h:133
An node in the FIB graph.
Definition: fib_node.h:295
vl_api_address_t dst
Definition: gre.api:55
vtep_table_t vtep_table
Definition: vxlan.h:167
u32 dev_instance
Definition: vxlan.h:130
u32 mcast_sw_if_index
Definition: vxlan.h:97
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
vxlan_input_next_t
Definition: vxlan.h:140
u32 sw_if_index
Definition: vxlan.h:106
u32 hw_if_index
Definition: vxlan.h:107
void vnet_int_vxlan_bypass_mode(u32 sw_if_index, u8 is_ip6, u8 is_enable)
Definition: vxlan.c:902
struct _vlib_node_registration vlib_node_registration_t
uword * instance_used
Definition: vxlan.h:184
uword * bm_ip4_bypass_enabled_by_sw_if
Definition: vxlan.h:176
fib_node_index_t fib_entry_index
Definition: vxlan.h:118
u64 uword
Definition: types.h:112
u32 encap_fib_index
Definition: vxlan.h:103
u16 decap_next_index
Definition: vxlan.h:100
u32 * tunnel_index_by_sw_if_index
Definition: vxlan.h:173
u32 vnet_vxlan_get_tunnel_index(u32 sw_if_index)
Definition: vxlan.c:1133
clib_bihash_16_8_t vxlan4_tunnel_by_key
Definition: vxlan.h:162
dpo_id_t next_dpo
Definition: vxlan.h:87
vxlan_input_error_t
Definition: vxlan.h:148
vxlan_tunnel_t * tunnels
Definition: vxlan.h:159
ip46_address_t src
Definition: vxlan.h:93
vxlan_main_t vxlan_main
Definition: vxlan.c:44
u32 flow_index
Definition: vxlan.h:129