summaryrefslogtreecommitdiffstats
path: root/src/vnet/ip/ip6.h
blob: 4d94d8c12302290ebc97fa109eb45420a5444b6b (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
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
/*
 * Copyright (c) 2016 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.
 */
/*
 * ip/ip6.h: ip6 main include file
 *
 * Copyright (c) 2008 Eliot Dresselhaus
 *
 * Permission is hereby granted, free of charge, to any person obtaining
 * a copy of this software and associated documentation files (the
 * "Software"), to deal in the Software without restriction, including
 * without limitation the rights to use, copy, modify, merge, publish,
 * distribute, sublicense, and/or sell copies of the Software, and to
 * permit persons to whom the Software is furnished to do so, subject to
 * the following conditions:
 *
 * The above copyright notice and this permission notice shall be
 * included in all copies or substantial portions of the Software.
 *
 *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
 *  EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
 *  MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
 *  NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
 *  LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
 *  OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 *  WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

#ifndef included_ip_ip6_h
#define included_ip_ip6_h

#include <stdbool.h>

#include <vlib/buffer.h>

#include <vnet/ip/ip6_packet.h>
#include <vnet/ip/ip46_address.h>
#include <vnet/ip/ip6_hop_by_hop_packet.h>
#include <vnet/ip/lookup.h>
#include <vnet/ip/ip_interface.h>
#include <vnet/ip/ip_flow_hash.h>

typedef struct
{
  ip6_address_t addr;
  u32 dst_address_length;
  u32 vrf_index;
} ip6_fib_key_t;

typedef struct
{
  /* required for pool_get_aligned. */
  CLIB_CACHE_LINE_ALIGN_MARK (cacheline0);

  /* Table ID (hash key) for this FIB. */
  u32 table_id;

  /* Index into FIB vector. */
  u32 index;
} ip6_fib_t;

typedef struct ip6_mfib_t
{
  /* required for pool_get_aligned. */
  CLIB_CACHE_LINE_ALIGN_MARK (cacheline0);

  /* Table ID (hash key) for this FIB. */
  u32 table_id;

  /* Index into FIB vector. */
  u32 index;
} ip6_mfib_t;

struct ip6_main_t;

typedef void (ip6_add_del_interface_address_function_t)
  (struct ip6_main_t * im,
   uword opaque,
   u32 sw_if_index,
   ip6_address_t * address,
   u32 address_length, u32 if_address_index, u32 is_del);

typedef struct
{
  ip6_add_del_interface_address_function_t *function;
  uword function_opaque;
} ip6_add_del_interface_address_callback_t;

typedef void (ip6_table_bind_function_t)
  (struct ip6_main_t * im,
   uword opaque, u32 sw_if_index, u32 new_fib_index, u32 old_fib_index);

typedef struct
{
  ip6_table_bind_function_t *function;
  uword function_opaque;
} ip6_table_bind_callback_t;

typedef struct ip6_main_t
{
  ip_lookup_main_t lookup_main;

  /* Pool of FIBs. */
  struct fib_table_t_ *fibs;

  /* Pool of V6 FIBs. */
  ip6_fib_t *v6_fibs;

  /** Vector of MFIBs. */
  struct mfib_table_t_ *mfibs;

  /* Network byte orders subnet mask for each prefix length */
  ip6_address_t fib_masks[129];

  /* Table index indexed by software interface. */
  u32 *fib_index_by_sw_if_index;

  /** Table index indexed by software interface. */
  u32 *mfib_index_by_sw_if_index;

  /* IP6 enabled count by software interface */
  u8 *ip_enabled_by_sw_if_index;

  /* Hash table mapping table id to fib index.
     ID space is not necessarily dense; index space is dense. */
  uword *fib_index_by_table_id;

  /** Hash table mapping table id to multicast fib index.
     ID space is not necessarily dense; index space is dense. */
  uword *mfib_index_by_table_id;

  /* Hash table mapping interface rewrite adjacency index by sw if index. */
  uword *interface_route_adj_index_by_sw_if_index;

  /* Functions to call when interface address changes. */
    ip6_add_del_interface_address_callback_t
    * add_del_interface_address_callbacks;

  /** Functions to call when interface to table biding changes. */
  ip6_table_bind_callback_t *table_bind_callbacks;

  /* Seed for Jenkins hash used to compute ip6 flow hash. */
  u32 flow_hash_seed;

  struct
  {
    /* TTL to use for host generated packets. */
    u8 ttl;

    u8 pad[3];
  } host_config;

  /* HBH processing enabled? */
  u8 hbh_enabled;
} ip6_main_t;

#define ND_THROTTLE_BITS 512

/* Global ip6 main structure. */
extern ip6_main_t ip6_main;

/* Global ip6 input node.  Errors get attached to ip6 input node. */
extern vlib_node_registration_t ip6_input_node;
extern vlib_node_registration_t ip6_rewrite_node;
extern vlib_node_registration_t ip6_rewrite_mcast_node;
extern vlib_node_registration_t ip6_rewrite_local_node;
extern vlib_node_registration_t ip6_discover_neighbor_node;
extern vlib_node_registration_t ip6_glean_node;
extern vlib_node_registration_t ip6_midchain_node;
extern vlib_node_registration_t ip6_punt_node;

extern void ip6_forward_next_trace (vlib_main_t * vm,
				    vlib_node_runtime_t * node,
				    vlib_frame_t * frame,
				    vlib_rx_or_tx_t which_adj_index);

always_inline uword
ip6_destination_matches_route (const ip6_main_t * im,
			       const ip6_address_t * key,
			       const ip6_address_t * dest, uword dest_length)
{
  int i;
  for (i = 0; i < ARRAY_LEN (key->as_uword); i++)
    {
      if ((key->as_uword[i] ^ dest->as_uword[i]) & im->
	  fib_masks[dest_length].as_uword[i])
	return 0;
    }
  return 1;
}

always_inline uword
ip6_destination_matches_interface (ip6_main_t * im,
				   ip6_address_t * key,
				   ip_interface_address_t * ia)
{
  ip6_address_t *a = ip_interface_address_get_address (&im->lookup_main, ia);
  return ip6_destination_matches_route (im, key, a, ia->address_length);
}

/* As above but allows for unaligned destinations (e.g. works right from IP header of packet). */
always_inline uword
ip6_unaligned_destination_matches_route (ip6_main_t * im,
					 ip6_address_t * key,
					 ip6_address_t * dest,
					 uword dest_length)
{
  int i;
  for (i = 0; i < ARRAY_LEN (key->as_uword); i++)
    {
      if ((clib_mem_unaligned (&key->as_uword[i], uword) ^ dest->as_uword[i])
	  & im->fib_masks[dest_length].as_uword[i])
	return 0;
    }
  return 1;
}

/* Find interface address which matches destination. */
always_inline ip6_address_t *
ip6_interface_address_matching_destination (ip6_main_t * im,
					    const ip6_address_t * dst,
					    u32 sw_if_index,
					    ip_interface_address_t **
					    result_ia)
{
  ip_lookup_main_t *lm = &im->lookup_main;
  ip_interface_address_t *ia;
  ip6_address_t *result = 0;

  /* *INDENT-OFF* */
  foreach_ip_interface_address (lm, ia, sw_if_index,
                                1 /* honor unnumbered */,
  ({
    ip6_address_t * a = ip_interface_address_get_address (lm, ia);
    if (ip6_destination_matches_route (im, dst, a, ia->address_length))
      {
	result = a;
	break;
      }
  }));
  /* *INDENT-ON* */
  if (result_ia)
    *result_ia = result ? ia : 0;
  return result;
}

clib_error_t *ip6_add_del_interface_address (vlib_main_t * vm,
					     u32 sw_if_index,
					     ip6_address_t * address,
					     u32 address_length, u32 is_del);
void ip6_sw_interface_enable_disable (u32 sw_if_index, u32 is_enable);

/**
 * @brief get first IPv6 interface address
 */
ip6_address_t *ip6_interface_first_address (ip6_main_t * im, u32 sw_if_index);

int ip6_address_compare (ip6_address_t * a1, ip6_address_t * a2);

uword
ip6_udp_register_listener (vlib_main_t * vm,
			   u16 dst_port, u32 next_node_index);

u16 ip6_tcp_udp_icmp_compute_checksum (vlib_main_t * vm, vlib_buffer_t * p0,
				       ip6_header_t * ip0,
				       int *bogus_lengthp);

void ip6_register_protocol (u32 protocol, u32 node_index);
void ip6_unregister_protocol (u32 protocol);
void ip6_local_hop_by_hop_register_protocol (u32 protocol, u32 node_index);

serialize_function_t serialize_vnet_ip6_main, unserialize_vnet_ip6_main;

u8 *format_ip6_forward_next_trace (u8 * s, va_list * args);

u32 ip6_tcp_udp_icmp_validate_checksum (vlib_main_t * vm, vlib_buffer_t * p0);

void ip6_punt_policer_add_del (u8 is_add, u32 policer_index);
void ip6_punt_redirect_add (u32 rx_sw_if_index,
			    u32 tx_sw_if_index, ip46_address_t * nh);
void ip6_punt_redirect_add_paths (u32 rx_sw_if_index,
				  fib_route_path_t * paths);
void ip6_punt_redirect_del (u32 rx_sw_if_index);

int vnet_set_ip6_classify_intfc (vlib_main_t * vm, u32 sw_if_index,
				 u32 table_index);
extern vlib_node_registration_t ip6_lookup_node;

u8 *format_ip6_hop_by_hop_ext_hdr (u8 * s, va_list * args);
/*
 * Hop-by-Hop handling
 */
typedef struct
{
  /* Array of function pointers to HBH option handling routines */
  int (*options[256]) (vlib_buffer_t * b, ip6_header_t * ip,
		       ip6_hop_by_hop_option_t * opt);
  u8 *(*trace[256]) (u8 * s, ip6_hop_by_hop_option_t * opt);
  uword next_override;
} ip6_hop_by_hop_main_t;

extern ip6_hop_by_hop_main_t ip6_hop_by_hop_main;

int ip6_hbh_register_option (u8 option,
			     int options (vlib_buffer_t * b,
					  ip6_header_t * ip,
					  ip6_hop_by_hop_option_t * opt),
			     u8 * trace (u8 * s,
					 ip6_hop_by_hop_option_t * opt));
int ip6_hbh_unregister_option (u8 option);
void ip6_hbh_set_next_override (uword next);

always_inline u32
vlib_buffer_get_ip6_fib_index (vlib_buffer_t * b)
{
  u32 fib_index, sw_if_index;
  sw_if_index = vnet_buffer (b)->sw_if_index[VLIB_RX];
  fib_index = vnet_buffer (b)->sw_if_index[VLIB_TX];
  return (fib_index == (u32) ~ 0) ?
    vec_elt (ip6_main.fib_index_by_sw_if_index, sw_if_index) : fib_index;
}
#endif /* included_ip_ip6_h */

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