aboutsummaryrefslogtreecommitdiffstats
path: root/src/plugins/cnat/cnat_api.c
blob: 338cb5926a8df6a92bf89e5567f2c7815a105cf7 (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
342
343
344
345
346
347
348
349
350
/*
 * 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.
 */

#include <stddef.h>

#include <vnet/vnet.h>
#include <vnet/plugin/plugin.h>
#include <cnat/cnat_translation.h>
#include <cnat/cnat_session.h>
#include <cnat/cnat_client.h>
#include <cnat/cnat_snat.h>

#include <vnet/ip/ip_types_api.h>

#include <vpp/app/version.h>

#include <vlibapi/api.h>
#include <vlibmemory/api.h>

/* define message IDs */
#include <vnet/format_fns.h>
#include <cnat/cnat.api_enum.h>
#include <cnat/cnat.api_types.h>

/**
 * Base message ID fot the plugin
 */
static u32 cnat_base_msg_id;

#define REPLY_MSG_ID_BASE cnat_base_msg_id

#include <vlibapi/api_helper_macros.h>

static void
cnat_endpoint_decode (const vl_api_cnat_endpoint_t * in,
		      cnat_endpoint_t * out)
{
  out->ce_port = clib_net_to_host_u16 (in->port);
  out->ce_sw_if_index = clib_net_to_host_u32 (in->sw_if_index);
  out->ce_flags = 0;
  if (out->ce_sw_if_index == INDEX_INVALID)
    ip_address_decode2 (&in->addr, &out->ce_ip);
  else
    ip_address_family_decode (in->if_af, &out->ce_ip.version);
}

static void
cnat_endpoint_tuple_decode (const vl_api_cnat_endpoint_tuple_t * in,
			    cnat_endpoint_tuple_t * out)
{
  cnat_endpoint_decode (&in->src_ep, &out->src_ep);
  cnat_endpoint_decode (&in->dst_ep, &out->dst_ep);
}

static void
cnat_endpoint_encode (const cnat_endpoint_t * in,
		      vl_api_cnat_endpoint_t * out)
{
  out->port = clib_net_to_host_u16 (in->ce_port);
  out->sw_if_index = clib_net_to_host_u32 (in->ce_sw_if_index);
  out->if_af = ip_address_family_encode (in->ce_ip.version);
  if (in->ce_flags & CNAT_EP_FLAG_RESOLVED)
    ip_address_encode2 (&in->ce_ip, &out->addr);
  else
    clib_memset ((void *) &in->ce_ip, 0, sizeof (in->ce_ip));
}

static void
vl_api_cnat_translation_update_t_handler (vl_api_cnat_translation_update_t
					  * mp)
{
  vl_api_cnat_translation_update_reply_t *rmp;
  cnat_endpoint_t vip;
  cnat_endpoint_tuple_t *paths = NULL, *path;
  ip_protocol_t ip_proto;
  u32 id = ~0;
  u8 flags;
  int rv = 0;
  u32 pi, n_paths;

  rv = ip_proto_decode (mp->translation.ip_proto, &ip_proto);

  if (rv)
    goto done;

  n_paths = clib_net_to_host_u32 (mp->translation.n_paths);
  vec_validate (paths, n_paths - 1);

  for (pi = 0; pi < n_paths; pi++)
    {
      path = &paths[pi];
      cnat_endpoint_tuple_decode (&mp->translation.paths[pi], path);
    }
  cnat_endpoint_decode (&mp->translation.vip, &vip);

  flags = mp->translation.flags;
  if (!mp->translation.is_real_ip)
    flags |= CNAT_FLAG_EXCLUSIVE;
  id = cnat_translation_update (&vip, ip_proto, paths, flags);

  vec_free (paths);

done:
  /* *INDENT-OFF* */
  REPLY_MACRO2 (VL_API_CNAT_TRANSLATION_UPDATE_REPLY,
  ({
    rmp->id = htonl (id);
  }));
  /* *INDENT-ON* */
}

static void
vl_api_cnat_translation_del_t_handler (vl_api_cnat_translation_del_t * mp)
{
  vl_api_cnat_translation_del_reply_t *rmp;
  int rv;

  rv = cnat_translation_delete (ntohl (mp->id));

  REPLY_MACRO (VL_API_CNAT_TRANSLATION_DEL_REPLY);
}

typedef struct cnat_dump_walk_ctx_t_
{
  vl_api_registration_t *rp;
  u32 context;
} cnat_dump_walk_ctx_t;

static walk_rc_t
cnat_translation_send_details (u32 cti, void *args)
{
  vl_api_cnat_translation_details_t *mp;
  cnat_dump_walk_ctx_t *ctx;
  cnat_ep_trk_t *trk;
  vl_api_cnat_endpoint_tuple_t *path;
  size_t msg_size;
  cnat_translation_t *ct;
  u32 n_paths;

  ctx = args;
  ct = cnat_translation_get (cti);
  n_paths = vec_len (ct->ct_paths);
  msg_size = sizeof (*mp) + sizeof (mp->translation.paths[0]) * n_paths;

  mp = vl_msg_api_alloc_zero (msg_size);
  mp->_vl_msg_id = ntohs (VL_API_CNAT_TRANSLATION_DETAILS + cnat_base_msg_id);

  /* fill in the message */
  mp->context = ctx->context;
  mp->translation.n_paths = clib_host_to_net_u32 (n_paths);
  mp->translation.id = clib_host_to_net_u32 (cti);
  cnat_endpoint_encode (&ct->ct_vip, &mp->translation.vip);
  mp->translation.ip_proto = ip_proto_encode (ct->ct_proto);

  path = mp->translation.paths;
  vec_foreach (trk, ct->ct_paths)
  {
    cnat_endpoint_encode (&trk->ct_ep[VLIB_TX], &path->dst_ep);
    cnat_endpoint_encode (&trk->ct_ep[VLIB_RX], &path->src_ep);
    path++;
  }

  vl_api_send_msg (ctx->rp, (u8 *) mp);

  return (WALK_CONTINUE);
}

static void
vl_api_cnat_translation_dump_t_handler (vl_api_cnat_translation_dump_t * mp)
{
  vl_api_registration_t *rp;

  rp = vl_api_client_index_to_registration (mp->client_index);
  if (rp == 0)
    return;

  cnat_dump_walk_ctx_t ctx = {
    .rp = rp,
    .context = mp->context,
  };

  cnat_translation_walk (cnat_translation_send_details, &ctx);
}

static void
ip_address2_from_46 (const ip46_address_t * nh,
		     ip_address_family_t af, ip_address_t * ip)
{
  ip_addr_46 (ip) = *nh;
  ip_addr_version (ip) = af;
}

static walk_rc_t
cnat_session_send_details (const cnat_session_t * session, void *args)
{
  vl_api_cnat_session_details_t *mp;
  cnat_dump_walk_ctx_t *ctx;
  cnat_endpoint_t ep;

  ctx = args;

  mp = vl_msg_api_alloc_zero (sizeof (*mp));
  mp->_vl_msg_id = ntohs (VL_API_CNAT_SESSION_DETAILS + cnat_base_msg_id);

  /* fill in the message */
  mp->context = ctx->context;

  ip_address2_from_46 (&session->value.cs_ip[VLIB_TX], session->key.cs_af,
		       &ep.ce_ip);
  ep.ce_port = clib_host_to_net_u16 (session->value.cs_port[VLIB_TX]);
  cnat_endpoint_encode (&ep, &mp->session.new);

  ip_address2_from_46 (&session->key.cs_ip[VLIB_RX], session->key.cs_af,
		       &ep.ce_ip);
  ep.ce_port = clib_host_to_net_u16 (session->key.cs_port[VLIB_RX]);
  cnat_endpoint_encode (&ep, &mp->session.src);

  ip_address2_from_46 (&session->key.cs_ip[VLIB_TX], session->key.cs_af,
		       &ep.ce_ip);
  ep.ce_port = clib_host_to_net_u16 (session->key.cs_port[VLIB_TX]);
  cnat_endpoint_encode (&ep, &mp->session.dst);

  mp->session.ip_proto = ip_proto_encode (session->key.cs_proto);

  vl_api_send_msg (ctx->rp, (u8 *) mp);

  return (WALK_CONTINUE);
}

static void
vl_api_cnat_session_dump_t_handler (vl_api_cnat_session_dump_t * mp)
{
  vl_api_registration_t *rp;

  rp = vl_api_client_index_to_registration (mp->client_index);
  if (rp == 0)
    return;

  cnat_dump_walk_ctx_t ctx = {
    .rp = rp,
    .context = mp->context,
  };

  cnat_session_walk (cnat_session_send_details, &ctx);
}

static void
vl_api_cnat_session_purge_t_handler (vl_api_cnat_session_purge_t * mp)
{
  vl_api_cnat_session_purge_reply_t *rmp;
  int rv;

  cnat_client_throttle_pool_process ();
  rv = cnat_session_purge ();
  rv |= cnat_translation_purge ();

  REPLY_MACRO (VL_API_CNAT_SESSION_PURGE_REPLY);
}

static void
vl_api_cnat_get_snat_addresses_t_handler (vl_api_cnat_get_snat_addresses_t
					  * mp)
{
  vl_api_cnat_get_snat_addresses_reply_t *rmp;
  int rv = 0;

  /* *INDENT-OFF* */
  REPLY_MACRO2 (VL_API_CNAT_GET_SNAT_ADDRESSES_REPLY,
  ({
    ip6_address_encode (&ip_addr_v6(&cnat_main.snat_ip6.ce_ip), rmp->snat_ip6);
    ip4_address_encode (&ip_addr_v4(&cnat_main.snat_ip4.ce_ip), rmp->snat_ip4);
    rmp->sw_if_index = clib_host_to_net_u32 (cnat_main.snat_ip6.ce_sw_if_index);
  }));
  /* *INDENT-ON* */
}

static void
vl_api_cnat_set_snat_addresses_t_handler (vl_api_cnat_set_snat_addresses_t
					  * mp)
{
  vl_api_cnat_set_snat_addresses_reply_t *rmp;
  u32 sw_if_index = clib_net_to_host_u32 (mp->sw_if_index);
  ip4_address_t ip4;
  ip6_address_t ip6;
  int rv = 0;

  ip4_address_decode (mp->snat_ip4, &ip4);
  ip6_address_decode (mp->snat_ip6, &ip6);

  cnat_set_snat (&ip4, &ip6, sw_if_index);

  REPLY_MACRO (VL_API_CNAT_SET_SNAT_ADDRESSES_REPLY);
}

static void
  vl_api_cnat_add_del_snat_prefix_t_handler
  (vl_api_cnat_add_del_snat_prefix_t * mp)
{
  vl_api_cnat_add_del_snat_prefix_reply_t *rmp;
  ip_prefix_t pfx;
  int rv;

  ip_prefix_decode2 (&mp->prefix, &pfx);
  if (mp->is_add)
    rv = cnat_add_snat_prefix (&pfx);
  else
    rv = cnat_del_snat_prefix (&pfx);

  REPLY_MACRO (VL_API_CNAT_ADD_DEL_SNAT_PREFIX_REPLY);
}

#include <cnat/cnat.api.c>

static clib_error_t *
cnat_api_init (vlib_main_t * vm)
{
  /* Ask for a correctly-sized block of API message decode slots */
  cnat_base_msg_id = setup_message_id_table ();

  return 0;
}

VLIB_INIT_FUNCTION (cnat_api_init);

/* *INDENT-OFF* */
VLIB_PLUGIN_REGISTER () = {
    .version = VPP_BUILD_VER,
    .description = "CNat Translate",
};
/* *INDENT-ON* */

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