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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 <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/ip/udp.h>
30 #include <vnet/dpo/dpo.h>
31 #include <vnet/adj/adj_types.h>
32 
33 typedef CLIB_PACKED (struct {
34  ip4_header_t ip4; /* 20 bytes */
35  udp_header_t udp; /* 8 bytes */
36  vxlan_header_t vxlan; /* 8 bytes */
37 }) ip4_vxlan_header_t;
38 
39 typedef CLIB_PACKED (struct {
40  ip6_header_t ip6; /* 40 bytes */
41  udp_header_t udp; /* 8 bytes */
42  vxlan_header_t vxlan; /* 8 bytes */
43 }) ip6_vxlan_header_t;
44 
45 typedef CLIB_PACKED(struct {
46  /*
47  * Key fields: ip src and vxlan vni on incoming VXLAN packet
48  * all fields in NET byte order
49  */
50  union {
51  struct {
52  u32 src;
53  u32 vni; /* shifted left 8 bits */
54  };
55  u64 as_u64;
56  };
57 }) vxlan4_tunnel_key_t;
58 
59 typedef CLIB_PACKED(struct {
60  /*
61  * Key fields: ip src and vxlan vni on incoming VXLAN packet
62  * all fields in NET byte order
63  */
64  ip6_address_t src;
65  u32 vni; /* shifted left 8 bits */
66 }) vxlan6_tunnel_key_t;
67 
68 typedef struct {
69  /* Rewrite string. $$$$ embed vnet_rewrite header */
71 
72  /* FIB DPO for IP forwarding of VXLAN encap packet */
74 
75  /* storage for the hash key */
76  union {
77  vxlan4_tunnel_key_t *key4; /* unused for now */
78  vxlan6_tunnel_key_t *key6;
79  };
80 
81  /* vxlan VNI in HOST byte order */
83 
84  /* tunnel src and dst addresses */
85  ip46_address_t src;
86  ip46_address_t dst;
87 
88  /* mcast packet output intfc index (used only if dst is mcast) */
90 
91  /* decap next index */
93 
94  /* The FIB index for src/dst addresses */
96 
97  /* vnet intfc index */
100 
101  /**
102  * Linkage into the FIB object graph
103  */
105 
106  /*
107  * The FIB entry for (depending on VXLAN tunnel is unicast or mcast)
108  * sending unicast VXLAN encap packets or receiving mcast VXLAN packets
109  */
112 
113  /**
114  * The tunnel is a child of the FIB entry for its desintion. This is
115  * so it receives updates when the forwarding information for that entry
116  * changes.
117  * The tunnels sibling index on the FIB entry's dependency list.
118  */
121 
122 #define foreach_vxlan_input_next \
123 _(DROP, "error-drop") \
124 _(L2_INPUT, "l2-input")
125 
126 typedef enum {
127 #define _(s,n) VXLAN_INPUT_NEXT_##s,
129 #undef _
132 
133 typedef enum {
134 #define vxlan_error(n,s) VXLAN_ERROR_##n,
136 #undef vxlan_error
137  VXLAN_N_ERROR,
139 
140 typedef struct {
141  ip46_address_t * ip;
145 
146 typedef struct {
147  /* vector of encap tunnel instances */
149 
150  /* lookup tunnel by key */
151  uword * vxlan4_tunnel_by_key; /* keyed on ipv4.dst + vni */
152  uword * vxlan6_tunnel_by_key; /* keyed on ipv6.dst + vni */
153 
154  /* local VTEP IPs ref count used by vxlan-bypass node to check if
155  received VXLAN packet DIP matches any local VTEP address */
156  uword * vtep4; /* local ip4 VTEPs keyed on their ip4 addr */
157  uword * vtep6; /* local ip6 VTEPs keyed on their ip6 addr */
158 
159  /* set of active remote mcast VTEP */
161  uword * mcast_ep_by_ip; /* mcast VTEPs keyed on their ip46 addr */
162 
163  /* Free vlib hw_if_indices */
165 
166  /* Mapping from sw_if_index to tunnel index */
168 
169  /* convenience */
172 } vxlan_main_t;
173 
175 
180 
181 u8 * format_vxlan_encap_trace (u8 * s, va_list * args);
182 
183 typedef struct {
185 
186  /* we normally use is_ip4, but since this adds to the
187  * structure, this seems less of abreaking change */
189  ip46_address_t src, dst;
195 
197 (vnet_vxlan_add_del_tunnel_args_t *a, u32 * sw_if_indexp);
198 
199 #endif /* included_vnet_vxlan_h */
int vnet_vxlan_add_del_tunnel(vnet_vxlan_add_del_tunnel_args_t *a, u32 *sw_if_indexp)
Definition: vxlan.c:355
mcast_remote_t * mcast_eps
Definition: vxlan.h:160
u32 sibling_index
The tunnel is a child of the FIB entry for its desintion.
Definition: vxlan.h:119
a
Definition: bitmap.h:516
uword * vtep6
Definition: vxlan.h:157
u64 as_u64
Definition: bihash_doc.h:63
#define foreach_vxlan_input_next
Definition: vxlan.h:122
vlib_node_registration_t vxlan4_encap_node
(constructor) VLIB_REGISTER_NODE (vxlan4_encap_node)
Definition: encap.c:522
ip46_address_t dst
Definition: vxlan.h:86
struct _vlib_node_registration vlib_node_registration_t
vlib_node_registration_t vxlan4_input_node
(constructor) VLIB_REGISTER_NODE (vxlan4_input_node)
Definition: decap.c:22
vxlan6_tunnel_key_t * key6
Definition: vxlan.h:78
u8 * format_vxlan_encap_trace(u8 *s, va_list *args)
Definition: encap.c:49
vnet_main_t * vnet_main
Definition: vxlan.h:171
vlib_main_t * vlib_main
Definition: vxlan.h:170
unsigned long u64
Definition: types.h:89
fib_node_t node
Linkage into the FIB object graph.
Definition: vxlan.h:104
The identity of a DPO is a combination of its type and its instance number/index of objects of that t...
Definition: dpo.h:138
u8 * rewrite
Definition: vxlan.h:70
adj_index_t mcast_adj_index
Definition: vxlan.h:111
vlib_node_registration_t vxlan6_input_node
(constructor) VLIB_REGISTER_NODE (vxlan6_input_node)
Definition: decap.c:23
uword * vxlan4_tunnel_by_key
Definition: vxlan.h:151
vlib_node_registration_t vxlan6_encap_node
(constructor) VLIB_REGISTER_NODE (vxlan6_encap_node)
Definition: encap.c:538
An node in the FIB graph.
Definition: fib_node.h:273
u32 mcast_sw_if_index
Definition: vxlan.h:89
uword * mcast_ep_by_ip
Definition: vxlan.h:161
u32 fib_node_index_t
A typedef of a node index.
Definition: fib_types.h:28
u32 adj_index_t
An index for adjacencies.
Definition: adj_types.h:30
u32 decap_next_index
Definition: vxlan.h:92
vxlan_input_next_t
Definition: vxlan.h:126
unsigned int u32
Definition: types.h:88
uword * vtep4
Definition: vxlan.h:156
uword * vxlan6_tunnel_by_key
Definition: vxlan.h:152
u32 sw_if_index
Definition: vxlan.h:98
u32 hw_if_index
Definition: vxlan.h:99
adj_index_t mcast_adj_index
Definition: vxlan.h:143
u64 uword
Definition: types.h:112
unsigned char u8
Definition: types.h:56
fib_node_index_t fib_entry_index
Definition: vxlan.h:110
u32 encap_fib_index
Definition: vxlan.h:95
u32 * tunnel_index_by_sw_if_index
Definition: vxlan.h:167
typedef CLIB_PACKED(struct{ip4_header_t ip4;udp_header_t udp;vxlan_header_t vxlan;}) ip4_vxlan_header_t
dpo_id_t next_dpo
Definition: vxlan.h:73
vxlan4_tunnel_key_t * key4
Definition: vxlan.h:77
vxlan_input_error_t
Definition: vxlan.h:133
ip46_address_t * ip
Definition: vxlan.h:141
vxlan_tunnel_t * tunnels
Definition: vxlan.h:148
u32 * free_vxlan_tunnel_hw_if_indices
Definition: vxlan.h:164
ip46_address_t src
Definition: vxlan.h:85
vxlan_main_t vxlan_main
Definition: vxlan.h:174
fib_node_index_t fib_entry_index
Definition: vxlan.h:142