Line data Source code
1 : /*
2 : * ipip.h: types/functions for ipip.
3 : *
4 : * Copyright (c) 2018 Cisco and/or its affiliates.
5 : * Licensed under the Apache License, Version 2.0 (the "License");
6 : * you may not use this file except in compliance with the License.
7 : * You may obtain a copy of the License at:
8 : *
9 : * http://www.apache.org/licenses/LICENSE-2.0
10 : *
11 : * Unless required by applicable law or aipiped to in writing, software
12 : * distributed under the License is distributed on an "AS IS" BASIS,
13 : * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 : * See the License for the specific language governing permissions and
15 : * limitations under the License.
16 : */
17 :
18 : #ifndef included_ipip_h
19 : #define included_ipip_h
20 :
21 : #include <vnet/adj/adj_types.h>
22 : #include <vnet/ip/ip6_packet.h>
23 : #include <vnet/ip/format.h>
24 : #include <vnet/ip/ip.h>
25 : #include <vnet/tunnel/tunnel.h>
26 :
27 : extern vnet_hw_interface_class_t ipip_hw_interface_class;
28 :
29 : #define foreach_ipip_error \
30 : /* Must be first. */ \
31 : _(DECAP_PKTS, "packets decapsulated") \
32 : _(BAD_PROTOCOL, "bad protocol") \
33 : _(NO_TUNNEL, "no tunnel") \
34 : _(FRAGMENTED_PACKET, "fragmented outer packet")
35 :
36 : typedef enum
37 : {
38 : #define _(sym, str) IPIP_ERROR_##sym,
39 : foreach_ipip_error
40 : #undef _
41 : IPIP_N_ERROR,
42 : } ipip_error_t;
43 :
44 : /**
45 : * @brief IPIP Tunnel key
46 : */
47 : typedef enum
48 : {
49 : IPIP_TRANSPORT_IP4,
50 : IPIP_TRANSPORT_IP6,
51 : } __clib_packed ipip_transport_t;
52 :
53 : typedef enum
54 : {
55 : IPIP_MODE_P2P = 0,
56 : IPIP_MODE_P2MP,
57 : IPIP_MODE_6RD,
58 : } __clib_packed ipip_mode_t;
59 :
60 : typedef struct
61 : {
62 : ip46_address_t src;
63 : ip46_address_t dst;
64 : u32 fib_index;
65 : ipip_transport_t transport;
66 : ipip_mode_t mode;
67 : u16 __pad;
68 : } __clib_packed ipip_tunnel_key_t;
69 :
70 : STATIC_ASSERT_SIZEOF (ipip_tunnel_key_t, 5 * sizeof (u64));
71 :
72 : /**
73 : * @brief A representation of a IPIP tunnel
74 : */
75 : typedef struct
76 : {
77 : /* Required for pool_get_aligned */
78 : CLIB_CACHE_LINE_ALIGN_MARK (cacheline0);
79 :
80 : ipip_mode_t mode;
81 : ipip_transport_t transport;
82 : ip46_address_t tunnel_src;
83 : ip46_address_t tunnel_dst;
84 : u32 fib_index;
85 : u32 hw_if_index;
86 : u32 sw_if_index;
87 : u32 dev_instance; /* Real device instance in tunnel vector */
88 : u32 user_instance; /* Instance name being shown to user */
89 : tunnel_encap_decap_flags_t flags;
90 : ip_dscp_t dscp;
91 :
92 : struct
93 : {
94 : ip6_address_t ip6_prefix;
95 : ip4_address_t ip4_prefix;
96 : u8 ip6_prefix_len;
97 : u8 ip4_prefix_len;
98 : u8 shift;
99 : bool security_check;
100 : u32 ip6_fib_index;
101 : } sixrd;
102 : } ipip_tunnel_t;
103 :
104 : typedef struct
105 : {
106 : ipip_tunnel_t *tunnels;
107 : uword *tunnel_by_key;
108 : u32 *tunnel_index_by_sw_if_index;
109 :
110 : /* convenience */
111 : vlib_main_t *vlib_main;
112 : vnet_main_t *vnet_main;
113 :
114 : /* Record used instances */
115 : uword *instance_used;
116 :
117 : bool ip4_protocol_registered;
118 : bool ip6_protocol_registered;
119 :
120 : u16 msg_id_base;
121 : } ipip_main_t;
122 :
123 : extern ipip_main_t ipip_main;
124 : extern vlib_node_registration_t ipip4_input_node;
125 : extern vlib_node_registration_t ipip6_input_node;
126 :
127 : /*
128 : * sixrd_get_addr_net
129 : */
130 : static_always_inline u32
131 111 : sixrd_get_addr_net (const ipip_tunnel_t * t, u64 dal)
132 : {
133 : /* 1:1 mode */
134 111 : if (t->sixrd.ip4_prefix_len == 32)
135 0 : return (t->sixrd.ip4_prefix.as_u32);
136 :
137 111 : dal = clib_net_to_host_u64 (dal);
138 :
139 : /* Grab 32 - ip4_prefix_len bits out of IPv6 address from offset
140 : * ip6_prefix_len */
141 111 : u32 mask = ~(~0ULL << (32 - t->sixrd.ip4_prefix_len));
142 111 : u32 ip4 =
143 111 : clib_net_to_host_u32 (t->sixrd.
144 111 : ip4_prefix.as_u32) | ((u32) (dal >> t->sixrd.
145 111 : shift) & mask);
146 111 : return clib_host_to_net_u32 (ip4);
147 : }
148 :
149 : int ipip_add_tunnel (ipip_transport_t transport, u32 instance,
150 : ip46_address_t * src, ip46_address_t * dst,
151 : u32 fib_index, tunnel_encap_decap_flags_t flags,
152 : ip_dscp_t dscp, tunnel_mode_t mode, u32 * sw_if_indexp);
153 : int ipip_del_tunnel (u32 sw_if_index);
154 : int sixrd_add_tunnel (ip6_address_t * ip6_prefix, u8 ip6_prefix_len,
155 : ip4_address_t * ip4_prefix, u8 ip4_prefix_len,
156 : ip4_address_t * ip4_src, bool security_check,
157 : u32 ip4_fib_index, u32 ip6_fib_index,
158 : u32 * sw_if_index);
159 : int sixrd_del_tunnel (u32 sw_if_index);
160 : void ipip_tunnel_db_add (ipip_tunnel_t * t, const ipip_tunnel_key_t * key);
161 : void ipip_tunnel_db_remove (ipip_tunnel_t * t, const ipip_tunnel_key_t * key);
162 : ipip_tunnel_t *ipip_tunnel_db_find (const ipip_tunnel_key_t * key);
163 : ipip_tunnel_t *ipip_tunnel_db_find_by_sw_if_index (u32 sw_if_index);
164 : void ipip_mk_key (const ipip_tunnel_t * t, ipip_tunnel_key_t * key);
165 : void ipip_mk_key_i (ipip_transport_t transport,
166 : ipip_mode_t mode,
167 : const ip46_address_t * src,
168 : const ip46_address_t * dst,
169 : u32 fib_index, ipip_tunnel_key_t * key);
170 :
171 : #endif
172 :
173 : /*
174 : * fd.io coding-style-patch-verification: ON
175 : *
176 : * Local Variables:
177 : * eval: (c-set-style "gnu")
178 : * End:
179 : */
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