aboutsummaryrefslogtreecommitdiffstats
path: root/src/plugins/nat/dslite/dslite.h
blob: d512cf47c9bc95988dca85bf43baef2081a78aa7 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
/*
 * Copyright (c) 2017 Cisco and/or its affiliates.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at:
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
#ifndef __included_dslite_h__
#define __included_dslite_h__

#include <vppinfra/bihash_8_8.h>
#include <vppinfra/bihash_16_8.h>
#include <vppinfra/bihash_24_8.h>
#include <nat/lib/alloc.h>
#include <nat/nat.h>
#include <nat/nat_inlines.h>

typedef struct
{
  union
  {
    struct
    {
      ip6_address_t softwire_id;
      ip4_address_t addr;
      u16 port;
      u8 proto;
      u8 pad;
    };
    u64 as_u64[3];
  };
} dslite_session_key_t;

/* *INDENT-OFF* */
typedef CLIB_PACKED (struct
{
  snat_session_key_t out2in;
  dslite_session_key_t in2out;
  u32 per_b4_index;
  u32 per_b4_list_head_index;
  f64 last_heard;
  u64 total_bytes;
  u32 total_pkts;
}) dslite_session_t;
/* *INDENT-ON* */

typedef struct
{
  ip6_address_t addr;
  u32 sessions_per_b4_list_head_index;
  u32 nsessions;
} dslite_b4_t;

typedef struct
{
  /* Main lookup tables */
  clib_bihash_8_8_t out2in;
  clib_bihash_24_8_t in2out;

  /* Find a B4 */
  clib_bihash_16_8_t b4_hash;

  /* B4 pool */
  dslite_b4_t *b4s;

  /* Session pool */
  dslite_session_t *sessions;

  /* Pool of doubly-linked list elements */
  dlist_elt_t *list_pool;
} dslite_per_thread_data_t;

typedef struct
{
  ip6_address_t aftr_ip6_addr;
  ip4_address_t aftr_ip4_addr;
  ip6_address_t b4_ip6_addr;
  ip4_address_t b4_ip4_addr;
  dslite_per_thread_data_t *per_thread_data;
  u32 num_workers;
  u32 first_worker_index;
  u16 port_per_thread;

  /* nat address pool */
  nat_ip4_pool_t pool;

  /* counters/gauges */
  vlib_simple_counter_main_t total_b4s;
  vlib_simple_counter_main_t total_sessions;

  /* node index */
  u32 dslite_in2out_node_index;
  u32 dslite_in2out_slowpath_node_index;
  u32 dslite_out2in_node_index;

  /* If set then the DSLite component behaves as CPE/B4
   * otherwise it behaves as AFTR */
  u8 is_ce;

  u16 msg_id_base;
} dslite_main_t;

typedef struct
{
  u32 next_index;
  u32 session_index;
} dslite_trace_t;

typedef struct
{
  u32 next_index;
} dslite_ce_trace_t;

#define foreach_dslite_error                    \
_(IN2OUT, "valid in2out DS-Lite packets")       \
_(OUT2IN, "valid out2in DS-Lite packets")       \
_(CE_ENCAP, "valid CE encap DS-Lite packets")   \
_(CE_DECAP, "valid CE decap DS-Lite packets")   \
_(NO_TRANSLATION, "no translation")             \
_(BAD_IP6_PROTOCOL, "bad ip6 protocol")         \
_(OUT_OF_PORTS, "out of ports")                 \
_(UNSUPPORTED_PROTOCOL, "unsupported protocol") \
_(BAD_ICMP_TYPE, "unsupported icmp type")       \
_(UNKNOWN, "unknown")

typedef enum
{
#define _(sym,str) DSLITE_ERROR_##sym,
  foreach_dslite_error
#undef _
    DSLITE_N_ERROR,
} dslite_error_t;

extern dslite_main_t dslite_main;
extern vlib_node_registration_t dslite_in2out_node;
extern vlib_node_registration_t dslite_in2out_slowpath_node;
extern vlib_node_registration_t dslite_out2in_node;
extern vlib_node_registration_t dslite_ce_encap_node;
extern vlib_node_registration_t dslite_ce_decap_node;

void dslite_set_ce (dslite_main_t * dm, u8 set);
int dslite_set_aftr_ip6_addr (dslite_main_t * dm, ip6_address_t * addr);
int dslite_set_b4_ip6_addr (dslite_main_t * dm, ip6_address_t * addr);
int dslite_set_aftr_ip4_addr (dslite_main_t * dm, ip4_address_t * addr);
int dslite_set_b4_ip4_addr (dslite_main_t * dm, ip4_address_t * addr);
int dslite_add_del_pool_addr (dslite_main_t * dm, ip4_address_t * addr,
			      u8 is_add);
u8 *format_dslite_trace (u8 * s, va_list * args);
u8 *format_dslite_ce_trace (u8 * s, va_list * args);

#endif /* __included_dslite_h__ */

/*
 * fd.io coding-style-patch-verification: ON
 *
 * Local Variables:
 * eval: (c-set-style "gnu")
 * End:
 */