summaryrefslogtreecommitdiffstats
path: root/hicn-light/src/config/controlAddConnection.c
blob: 0603e37a56a347308b0717c7828de3994eb2c8e9 (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
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
/*
 * Copyright (c) 2017-2019 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 <src/config.h>

#include <ctype.h>
#include <parc/assert/parc_Assert.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <strings.h>

#include <parc/algol/parc_Memory.h>
#include <parc/algol/parc_Network.h>

#include <src/config/controlAddConnection.h>

#include <src/utils/commands.h>
#include <src/utils/utils.h>

// ===================================================

static void _controlAddConnection_Init(CommandParser *parser, CommandOps *ops);
static CommandReturn _controlAddConnection_HelpExecute(CommandParser *parser,
                                                       CommandOps *ops,
                                                       PARCList *args);
static CommandReturn _controlAddConnection_Execute(CommandParser *parser,
                                                   CommandOps *ops,
                                                   PARCList *args);

// ===================================================

static CommandReturn _controlAddConnection_HicnHelpExecute(
    CommandParser *parser, CommandOps *ops, PARCList *args);
static CommandReturn _controlAddConnection_HicnExecute(CommandParser *parser,
                                                       CommandOps *ops,
                                                       PARCList *args);

static CommandReturn _controlAddConnection_UdpHelpExecute(CommandParser *parser,
                                                          CommandOps *ops,
                                                          PARCList *args);
static CommandReturn _controlAddConnection_UdpExecute(CommandParser *parser,
                                                      CommandOps *ops,
                                                      PARCList *args);

static CommandReturn _controlAddConnection_TcpHelpExecute(CommandParser *parser,
                                                          CommandOps *ops,
                                                          PARCList *args);
static CommandReturn _controlAddConnection_TcpExecute(CommandParser *parser,
                                                      CommandOps *ops,
                                                      PARCList *args);

// ===================================================

static const char *_commandAddConnection = "add connection";
static const char *_commandAddConnectionHicn = "add connection hicn";
static const char *_commandAddConnectionUdp = "add connection udp";
static const char *_commandAddConnectionTcp = "add connection tcp";
static const char *_commandAddConnectionHelp = "help add connection";
static const char *_commandAddConnectionHicnHelp = "help add connection hicn";
static const char *_commandAddConnectionUdpHelp = "help add connection udp";
static const char *_commandAddConnectionTcpHelp = "help add connection tcp";

// ===================================================

CommandOps *controlAddConnection_Create(ControlState *state) {
  return commandOps_Create(state, _commandAddConnection,
                           _controlAddConnection_Init,
                           _controlAddConnection_Execute, commandOps_Destroy);
}

CommandOps *controlAddConnection_HelpCreate(ControlState *state) {
  return commandOps_Create(state, _commandAddConnectionHelp, NULL,
                           _controlAddConnection_HelpExecute,
                           commandOps_Destroy);
}

// ===================================================

static CommandOps *_controlAddConnection_HicnCreate(ControlState *state) {
  return commandOps_Create(state, _commandAddConnectionHicn, NULL,
                           _controlAddConnection_HicnExecute,
                           commandOps_Destroy);
}

static CommandOps *_controlAddConnection_UdpCreate(ControlState *state) {
  return commandOps_Create(state, _commandAddConnectionUdp, NULL,
                           _controlAddConnection_UdpExecute,
                           commandOps_Destroy);
}

static CommandOps *_controlAddConnection_TcpCreate(ControlState *state) {
  return commandOps_Create(state, _commandAddConnectionTcp, NULL,
                           _controlAddConnection_TcpExecute,
                           commandOps_Destroy);
}

// ===================================================

static CommandOps *_controlAddConnection_HicnHelpCreate(ControlState *state) {
  return commandOps_Create(state, _commandAddConnectionHicnHelp, NULL,
                           _controlAddConnection_HicnHelpExecute,
                           commandOps_Destroy);
}

static CommandOps *_controlAddConnection_UdpHelpCreate(ControlState *state) {
  return commandOps_Create(state, _commandAddConnectionUdpHelp, NULL,
                           _controlAddConnection_UdpHelpExecute,
                           commandOps_Destroy);
}

static CommandOps *_controlAddConnection_TcpHelpCreate(ControlState *state) {
  return commandOps_Create(state, _commandAddConnectionTcpHelp, NULL,
                           _controlAddConnection_TcpHelpExecute,
                           commandOps_Destroy);
}

// ===================================================

static CommandReturn _controlAddConnection_HelpExecute(CommandParser *parser,
                                                       CommandOps *ops,
                                                       PARCList *args) {
  printf("Available commands:\n");
  printf("   %s\n", _commandAddConnectionHicn);
  printf("   %s\n", _commandAddConnectionUdp);
  printf("   %s\n", _commandAddConnectionTcp);
  printf("\n");
  return CommandReturn_Success;
}

static void _controlAddConnection_Init(CommandParser *parser, CommandOps *ops) {
  ControlState *state = ops->closure;
  controlState_RegisterCommand(state,
                               _controlAddConnection_HicnHelpCreate(state));
  controlState_RegisterCommand(state,
                               _controlAddConnection_UdpHelpCreate(state));
  controlState_RegisterCommand(state,
                               _controlAddConnection_TcpHelpCreate(state));

  controlState_RegisterCommand(state, _controlAddConnection_HicnCreate(state));
  controlState_RegisterCommand(state, _controlAddConnection_UdpCreate(state));
  controlState_RegisterCommand(state, _controlAddConnection_TcpCreate(state));
}

static CommandReturn _controlAddConnection_Execute(CommandParser *parser,
                                                   CommandOps *ops,
                                                   PARCList *args) {
  return _controlAddConnection_HelpExecute(parser, ops, args);
}

// ===================================================
// functions general to all connection types

/**
 * Create a tunnel in the forwarder based on the addresses
 *
 * Caller retains ownership of memory.
 * The symbolic name will be used to refer to this connection. It must be unqiue
 * otherwise the forwarder will reject this commend.
 *
 * @param [in] parser An allocated CommandParser
 * @param [in] ops Allocated CommandOps (needed to extract ControlState)
 * @param [in] localAddress the local IP and port.  The port may be the wildcard
 * value.
 * @param [in] remoteAddress The remote IP and port (both must be specified)
 * @param [in] tunnelType The tunneling protocol
 * @param [in] symbolic The symbolic name for the connection (must be unique)
 *
 * @return <#value#> <#explanation#>
 *
 * Example:
 * @code
 * {
 *      struct sockaddr_in *anyAddress = parcNetwork_SockInet4AddressAny();
 *      struct sockaddr_in *remote     =
 * parcNetwork_SockInet4Address("192.168.1.2", 9695);
 *
 *      Address *localAddress = addressCreateFromInet(anyAddress);
 *      Address *remoteAddress = addressCreateFromInet(remote);
 *
 *      control_CreateTunnel(state, localAddress, remoteAddress, IPTUN_TCP,
 * "conn7");
 *
 *      addressDestroy(&localAddress);
 *      addressDestroy(&remoteAddress);
 *      parcMemory_Deallocate((void **)&remote);
 *      parcMemory_Deallocate((void **)&anyAddress);
 * }
 * @endcode
 */

static CommandReturn _controlAddConnection_CreateTunnel(
    CommandParser *parser, CommandOps *ops, const char *local_ip,
    const char *local_port, const char *remote_ip, const char *remote_port,
    connection_type tunnelType, const char *symbolic) {
  ControlState *state = ops->closure;
  // a request like this always has an interface index of 0 [FIELD REMOVED]
  // unsigned int interfaceIndex = 0;

  // allocate command payload
  add_connection_command *addConnectionCommand =
      parcMemory_AllocateAndClear(sizeof(add_connection_command));

  // check and set IP addresses
  if (inet_pton(AF_INET, remote_ip, &addConnectionCommand->remoteIp.ipv4) ==
          1 &&
      inet_pton(AF_INET, local_ip, &addConnectionCommand->localIp.ipv4) == 1) {
    addConnectionCommand->ipType = ADDR_INET;

  } else if (inet_pton(AF_INET6, remote_ip,
                       &addConnectionCommand->remoteIp.ipv6) == 1 &&
             inet_pton(AF_INET6, local_ip,
                       &addConnectionCommand->localIp.ipv6) == 1) {
    addConnectionCommand->ipType = ADDR_INET6;

  } else {
    printf("Error: local address %s not same type as remote address %s\n",
           local_ip, remote_ip);
    parcMemory_Deallocate(&addConnectionCommand);
    return CommandReturn_Failure;
  }

  // Fill remaining payload fields
  addConnectionCommand->connectionType = tunnelType;
  strcpy(addConnectionCommand->symbolic, symbolic);
  addConnectionCommand->remotePort = htons((uint16_t)atoi(remote_port));
  addConnectionCommand->localPort = htons((uint16_t)atoi(local_port));

  // send message and receive response
  struct iovec *response =
      utils_SendRequest(state, ADD_CONNECTION, addConnectionCommand,
                        sizeof(add_connection_command));

  if (!response) {  // get NULL pointer
    return CommandReturn_Failure;
  }

  parcMemory_Deallocate(&response);  // free iovec pointer
  return CommandReturn_Success;
}

static CommandReturn _controlAddConnection_IpHelp(CommandParser *parser,
                                                  CommandOps *ops,
                                                  PARCList *args,
                                                  const char *protocol) {
  printf("add connection hicn <symbolic> <remote_ip> <local_ip>\n");
  printf(
      "add connection udp <symbolic> <remote_ip> <port> <local_ip> <port>\n");
  printf(
      "  <symbolic>              : symbolic name, e.g. 'conn1' (must be "
      "unique, start with alpha)\n");
  printf(
      "  <remote_ip>  : the IPv4 or IPv6 or hostname of the remote system\n");
  printf("  <local_ip>              : optional local IP address to bind to\n");
  printf("\n");
  return CommandReturn_Success;
}

static CommandReturn _controlAddConnection_HicnHelpExecute(
    CommandParser *parser, CommandOps *ops, PARCList *args) {
  _controlAddConnection_IpHelp(parser, ops, args, "hicn");

  return CommandReturn_Success;
}

static CommandReturn _controlAddConnection_HicnExecute(CommandParser *parser,
                                                       CommandOps *ops,
                                                       PARCList *args) {
  static const int _indexSymbolic = 3;
  static const int _indexRemAddr = 4;
  static const int _indexLocAddr = 5;

  if (parcList_Size(args) != 6) {
    _controlAddConnection_HicnHelpExecute(parser, ops, args);
    return CommandReturn_Failure;
  }

  char *symbolic = parcList_GetAtIndex(args, _indexSymbolic);

  if (!utils_ValidateSymbolicName(symbolic)) {
    printf(
        "Invalid symbolic name.  Must begin with alpha and contain only "
        "alphanum.\n");
    return CommandReturn_Failure;
  }

  char *remote_ip = parcList_GetAtIndex(args, _indexRemAddr);
  char *local_ip = parcList_GetAtIndex(args, _indexLocAddr);
  char *port = "1234";  // this is a random port number that will be ignored

  return _controlAddConnection_CreateTunnel(
      parser, ops, local_ip, port, remote_ip, port, HICN_CONN, symbolic);
}

static CommandReturn _controlAddConnection_UdpHelpExecute(CommandParser *parser,
                                                          CommandOps *ops,
                                                          PARCList *args) {
  _controlAddConnection_IpHelp(parser, ops, args, "udp");

  return CommandReturn_Success;
}

static CommandReturn _controlAddConnection_UdpExecute(CommandParser *parser,
                                                      CommandOps *ops,
                                                      PARCList *args) {
  static const int _indexSymbolic = 3;
  static const int _indexRemAddr = 4;
  static const int _indexRemPort = 5;
  static const int _indexLocAddr = 6;
  static const int _indexLocPort = 7;

  if (parcList_Size(args) != 8) {
    _controlAddConnection_UdpHelpExecute(parser, ops, args);
    return CommandReturn_Failure;
  }

  char *symbolic = parcList_GetAtIndex(args, _indexSymbolic);

  if (!utils_ValidateSymbolicName(symbolic)) {
    printf(
        "Invalid symbolic name.  Must begin with alpha and contain only "
        "alphanum.\n");
    return CommandReturn_Failure;
  }

  char *remote_ip = parcList_GetAtIndex(args, _indexRemAddr);
  char *local_ip = parcList_GetAtIndex(args, _indexLocAddr);

  char *remote_port = parcList_GetAtIndex(args, _indexRemPort);
  char *local_port = parcList_GetAtIndex(args, _indexLocPort);

  return _controlAddConnection_CreateTunnel(parser, ops, local_ip, local_port,
                                            remote_ip, remote_port, UDP_CONN,
                                            symbolic);
}

static CommandReturn _controlAddConnection_TcpHelpExecute(CommandParser *parser,
                                                          CommandOps *ops,
                                                          PARCList *args) {
  _controlAddConnection_IpHelp(parser, ops, args, "tcp");

  return CommandReturn_Success;
}

static CommandReturn _controlAddConnection_TcpExecute(CommandParser *parser,
                                                      CommandOps *ops,
                                                      PARCList *args) {
  static const int _indexSymbolic = 3;
  static const int _indexRemAddr = 4;
  static const int _indexRemPort = 5;
  static const int _indexLocAddr = 6;
  static const int _indexLocPort = 7;

  if (parcList_Size(args) != 8) {
    _controlAddConnection_UdpHelpExecute(parser, ops, args);
    return CommandReturn_Failure;
  }

  char *symbolic = parcList_GetAtIndex(args, _indexSymbolic);

  if (!utils_ValidateSymbolicName(symbolic)) {
    printf(
        "Invalid symbolic name.  Must begin with alpha and contain only "
        "alphanum.\n");
    return CommandReturn_Failure;
  }

  char *remote_ip = parcList_GetAtIndex(args, _indexRemAddr);
  char *local_ip = parcList_GetAtIndex(args, _indexLocAddr);

  char *remote_port = parcList_GetAtIndex(args, _indexRemPort);
  char *local_port = parcList_GetAtIndex(args, _indexLocPort);

  return _controlAddConnection_CreateTunnel(parser, ops, local_ip, local_port,
                                            remote_ip, remote_port, TCP_CONN,
                                            symbolic);
}