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Diffstat (limited to 'src/cli/nat-auto/gnunet-nat-auto.c')
-rw-r--r-- | src/cli/nat-auto/gnunet-nat-auto.c | 367 |
1 files changed, 367 insertions, 0 deletions
diff --git a/src/cli/nat-auto/gnunet-nat-auto.c b/src/cli/nat-auto/gnunet-nat-auto.c new file mode 100644 index 000000000..055a949bd --- /dev/null +++ b/src/cli/nat-auto/gnunet-nat-auto.c | |||
@@ -0,0 +1,367 @@ | |||
1 | /* | ||
2 | This file is part of GNUnet. | ||
3 | Copyright (C) 2015, 2016, 2017 GNUnet e.V. | ||
4 | |||
5 | GNUnet is free software: you can redistribute it and/or modify it | ||
6 | under the terms of the GNU Affero General Public License as published | ||
7 | by the Free Software Foundation, either version 3 of the License, | ||
8 | or (at your option) any later version. | ||
9 | |||
10 | GNUnet is distributed in the hope that it will be useful, but | ||
11 | WITHOUT ANY WARRANTY; without even the implied warranty of | ||
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
13 | Affero General Public License for more details. | ||
14 | |||
15 | You should have received a copy of the GNU Affero General Public License | ||
16 | along with this program. If not, see <http://www.gnu.org/licenses/>. | ||
17 | |||
18 | SPDX-License-Identifier: AGPL3.0-or-later | ||
19 | */ | ||
20 | |||
21 | /** | ||
22 | * @file src/nat/gnunet-nat-auto.c | ||
23 | * @brief Command-line tool for testing and autoconfiguration of NAT traversal | ||
24 | * @author Christian Grothoff | ||
25 | * @author Bruno Cabral | ||
26 | */ | ||
27 | #include "platform.h" | ||
28 | #include "gnunet_util_lib.h" | ||
29 | #include "gnunet_nat_service.h" | ||
30 | #include "gnunet_nat_auto_service.h" | ||
31 | |||
32 | /** | ||
33 | * Value to return from #main(). | ||
34 | */ | ||
35 | static int global_ret; | ||
36 | |||
37 | /** | ||
38 | * Handle to ongoing autoconfiguration. | ||
39 | */ | ||
40 | static struct GNUNET_NAT_AUTO_AutoHandle *ah; | ||
41 | |||
42 | /** | ||
43 | * If we do auto-configuration, should we write the result | ||
44 | * to a file? | ||
45 | */ | ||
46 | static int write_cfg; | ||
47 | |||
48 | /** | ||
49 | * Configuration filename. | ||
50 | */ | ||
51 | static const char *cfg_file; | ||
52 | |||
53 | /** | ||
54 | * Original configuration. | ||
55 | */ | ||
56 | static const struct GNUNET_CONFIGURATION_Handle *cfg; | ||
57 | |||
58 | /** | ||
59 | * Adapter we are supposed to test. | ||
60 | */ | ||
61 | static char *section_name; | ||
62 | |||
63 | /** | ||
64 | * Should we run autoconfiguration? | ||
65 | */ | ||
66 | static int do_auto; | ||
67 | |||
68 | /** | ||
69 | * Handle to a NAT test operation. | ||
70 | */ | ||
71 | static struct GNUNET_NAT_AUTO_Test *nt; | ||
72 | |||
73 | /** | ||
74 | * Flag set to 1 if we use IPPROTO_UDP. | ||
75 | */ | ||
76 | static int use_udp; | ||
77 | |||
78 | /** | ||
79 | * Flag set to 1 if we use IPPROTO_TCP. | ||
80 | */ | ||
81 | static int use_tcp; | ||
82 | |||
83 | /** | ||
84 | * Protocol to use. | ||
85 | */ | ||
86 | static uint8_t proto; | ||
87 | |||
88 | /** | ||
89 | * Test if all activities have finished, and if so, | ||
90 | * terminate. | ||
91 | */ | ||
92 | static void | ||
93 | test_finished () | ||
94 | { | ||
95 | if (NULL != ah) | ||
96 | return; | ||
97 | if (NULL != nt) | ||
98 | return; | ||
99 | GNUNET_SCHEDULER_shutdown (); | ||
100 | } | ||
101 | |||
102 | |||
103 | /** | ||
104 | * Function to iterate over suggested changes options | ||
105 | * | ||
106 | * @param cls closure | ||
107 | * @param section name of the section | ||
108 | * @param option name of the option | ||
109 | * @param value value of the option | ||
110 | */ | ||
111 | static void | ||
112 | auto_conf_iter (void *cls, | ||
113 | const char *section, | ||
114 | const char *option, | ||
115 | const char *value) | ||
116 | { | ||
117 | struct GNUNET_CONFIGURATION_Handle *new_cfg = cls; | ||
118 | |||
119 | printf ("%s: %s\n", option, value); | ||
120 | if (NULL != new_cfg) | ||
121 | GNUNET_CONFIGURATION_set_value_string (new_cfg, section, option, value); | ||
122 | } | ||
123 | |||
124 | |||
125 | /** | ||
126 | * Function called with the result from the autoconfiguration. | ||
127 | * | ||
128 | * @param cls closure | ||
129 | * @param diff minimal suggested changes to the original configuration | ||
130 | * to make it work (as best as we can) | ||
131 | * @param result #GNUNET_NAT_ERROR_SUCCESS on success, otherwise the specific error code | ||
132 | * @param type what the situation of the NAT | ||
133 | */ | ||
134 | static void | ||
135 | auto_config_cb (void *cls, | ||
136 | const struct GNUNET_CONFIGURATION_Handle *diff, | ||
137 | enum GNUNET_NAT_StatusCode result, | ||
138 | enum GNUNET_NAT_Type type) | ||
139 | { | ||
140 | const char *nat_type; | ||
141 | char unknown_type[64]; | ||
142 | struct GNUNET_CONFIGURATION_Handle *new_cfg; | ||
143 | |||
144 | ah = NULL; | ||
145 | switch (type) | ||
146 | { | ||
147 | case GNUNET_NAT_TYPE_NO_NAT: | ||
148 | nat_type = "NO NAT"; | ||
149 | break; | ||
150 | |||
151 | case GNUNET_NAT_TYPE_UNREACHABLE_NAT: | ||
152 | nat_type = "NAT but we can traverse"; | ||
153 | break; | ||
154 | |||
155 | case GNUNET_NAT_TYPE_STUN_PUNCHED_NAT: | ||
156 | nat_type = "NAT but STUN is able to identify the correct information"; | ||
157 | break; | ||
158 | |||
159 | case GNUNET_NAT_TYPE_UPNP_NAT: | ||
160 | nat_type = "NAT but UPNP opened the ports"; | ||
161 | break; | ||
162 | |||
163 | default: | ||
164 | sprintf (unknown_type, "NAT unknown, type %u", type); | ||
165 | nat_type = unknown_type; | ||
166 | break; | ||
167 | } | ||
168 | |||
169 | GNUNET_log (GNUNET_ERROR_TYPE_MESSAGE, | ||
170 | "NAT status: %s/%s\n", | ||
171 | GNUNET_NAT_AUTO_status2string (result), | ||
172 | nat_type); | ||
173 | |||
174 | if (NULL == diff) | ||
175 | return; | ||
176 | |||
177 | /* Shortcut: if there are no changes suggested, bail out early. */ | ||
178 | if (GNUNET_NO == GNUNET_CONFIGURATION_is_dirty (diff)) | ||
179 | { | ||
180 | test_finished (); | ||
181 | return; | ||
182 | } | ||
183 | |||
184 | /* Apply diff to original configuration and show changes | ||
185 | to the user */ | ||
186 | new_cfg = write_cfg ? GNUNET_CONFIGURATION_dup (cfg) : NULL; | ||
187 | |||
188 | GNUNET_log (GNUNET_ERROR_TYPE_MESSAGE, | ||
189 | _ ("Suggested configuration changes:\n")); | ||
190 | GNUNET_CONFIGURATION_iterate_section_values (diff, | ||
191 | "nat", | ||
192 | &auto_conf_iter, | ||
193 | new_cfg); | ||
194 | |||
195 | /* If desired, write configuration to file; we write only the | ||
196 | changes to the defaults to keep things compact. */ | ||
197 | if (write_cfg) | ||
198 | { | ||
199 | struct GNUNET_CONFIGURATION_Handle *def_cfg; | ||
200 | |||
201 | GNUNET_CONFIGURATION_set_value_string (new_cfg, "ARM", "CONFIG", NULL); | ||
202 | def_cfg = GNUNET_CONFIGURATION_create (); | ||
203 | GNUNET_break (GNUNET_OK == GNUNET_CONFIGURATION_load (def_cfg, NULL)); | ||
204 | if (GNUNET_OK != | ||
205 | GNUNET_CONFIGURATION_write_diffs (def_cfg, new_cfg, cfg_file)) | ||
206 | { | ||
207 | GNUNET_log (GNUNET_ERROR_TYPE_MESSAGE, | ||
208 | _ ("Failed to write configuration to `%s'\n"), | ||
209 | cfg_file); | ||
210 | global_ret = 1; | ||
211 | } | ||
212 | else | ||
213 | { | ||
214 | GNUNET_log (GNUNET_ERROR_TYPE_MESSAGE, | ||
215 | _ ("Wrote updated configuration to `%s'\n"), | ||
216 | cfg_file); | ||
217 | } | ||
218 | GNUNET_CONFIGURATION_destroy (def_cfg); | ||
219 | } | ||
220 | |||
221 | if (NULL != new_cfg) | ||
222 | GNUNET_CONFIGURATION_destroy (new_cfg); | ||
223 | test_finished (); | ||
224 | } | ||
225 | |||
226 | |||
227 | /** | ||
228 | * Function called to report success or failure for | ||
229 | * NAT configuration test. | ||
230 | * | ||
231 | * @param cls closure | ||
232 | * @param result #GNUNET_NAT_ERROR_SUCCESS on success, otherwise the specific error code | ||
233 | */ | ||
234 | static void | ||
235 | test_report_cb (void *cls, enum GNUNET_NAT_StatusCode result) | ||
236 | { | ||
237 | nt = NULL; | ||
238 | printf ("NAT test result: %s\n", GNUNET_NAT_AUTO_status2string (result)); | ||
239 | test_finished (); | ||
240 | } | ||
241 | |||
242 | |||
243 | /** | ||
244 | * Task run on shutdown. | ||
245 | * | ||
246 | * @param cls NULL | ||
247 | */ | ||
248 | static void | ||
249 | do_shutdown (void *cls) | ||
250 | { | ||
251 | if (NULL != ah) | ||
252 | { | ||
253 | GNUNET_NAT_AUTO_autoconfig_cancel (ah); | ||
254 | ah = NULL; | ||
255 | } | ||
256 | if (NULL != nt) | ||
257 | { | ||
258 | GNUNET_NAT_AUTO_test_stop (nt); | ||
259 | nt = NULL; | ||
260 | } | ||
261 | } | ||
262 | |||
263 | |||
264 | /** | ||
265 | * Main function that will be run. | ||
266 | * | ||
267 | * @param cls closure | ||
268 | * @param args remaining command-line arguments | ||
269 | * @param cfgfile name of the configuration file used (for saving, can be NULL!) | ||
270 | * @param c configuration | ||
271 | */ | ||
272 | static void | ||
273 | run (void *cls, | ||
274 | char *const *args, | ||
275 | const char *cfgfile, | ||
276 | const struct GNUNET_CONFIGURATION_Handle *c) | ||
277 | { | ||
278 | cfg_file = cfgfile; | ||
279 | cfg = c; | ||
280 | |||
281 | GNUNET_SCHEDULER_add_shutdown (&do_shutdown, NULL); | ||
282 | |||
283 | if (do_auto) | ||
284 | { | ||
285 | ah = GNUNET_NAT_AUTO_autoconfig_start (c, &auto_config_cb, NULL); | ||
286 | } | ||
287 | |||
288 | if (use_tcp && use_udp) | ||
289 | { | ||
290 | if (do_auto) | ||
291 | return; | ||
292 | GNUNET_log (GNUNET_ERROR_TYPE_MESSAGE, "Cannot use TCP and UDP\n"); | ||
293 | global_ret = 1; | ||
294 | return; | ||
295 | } | ||
296 | proto = 0; | ||
297 | if (use_tcp) | ||
298 | proto = IPPROTO_TCP; | ||
299 | if (use_udp) | ||
300 | proto = IPPROTO_UDP; | ||
301 | |||
302 | if (NULL != section_name) | ||
303 | { | ||
304 | nt = GNUNET_NAT_AUTO_test_start (c, | ||
305 | proto, | ||
306 | section_name, | ||
307 | &test_report_cb, | ||
308 | NULL); | ||
309 | } | ||
310 | test_finished (); | ||
311 | } | ||
312 | |||
313 | |||
314 | /** | ||
315 | * Main function of gnunet-nat-auto | ||
316 | * | ||
317 | * @param argc number of command-line arguments | ||
318 | * @param argv command line | ||
319 | * @return 0 on success, -1 on error | ||
320 | */ | ||
321 | int | ||
322 | main (int argc, char *const argv[]) | ||
323 | { | ||
324 | struct GNUNET_GETOPT_CommandLineOption options[] = | ||
325 | { GNUNET_GETOPT_option_flag ('a', | ||
326 | "auto", | ||
327 | gettext_noop ("run autoconfiguration"), | ||
328 | &do_auto), | ||
329 | |||
330 | GNUNET_GETOPT_option_string ( | ||
331 | 'S', | ||
332 | "section", | ||
333 | "NAME", | ||
334 | gettext_noop ( | ||
335 | "section name providing the configuration for the adapter"), | ||
336 | §ion_name), | ||
337 | |||
338 | GNUNET_GETOPT_option_flag ('t', "tcp", gettext_noop ("use TCP"), &use_tcp), | ||
339 | |||
340 | GNUNET_GETOPT_option_flag ('u', "udp", gettext_noop ("use UDP"), &use_udp), | ||
341 | |||
342 | GNUNET_GETOPT_option_flag ( | ||
343 | 'w', | ||
344 | "write", | ||
345 | gettext_noop ("write configuration file (for autoconfiguration)"), | ||
346 | &write_cfg), | ||
347 | GNUNET_GETOPT_OPTION_END }; | ||
348 | |||
349 | if (GNUNET_OK != GNUNET_STRINGS_get_utf8_args (argc, argv, &argc, &argv)) | ||
350 | return 2; | ||
351 | if (GNUNET_OK != | ||
352 | GNUNET_PROGRAM_run (argc, | ||
353 | argv, | ||
354 | "gnunet-nat-auto [options]", | ||
355 | _ ("GNUnet NAT traversal autoconfiguration"), | ||
356 | options, | ||
357 | &run, | ||
358 | NULL)) | ||
359 | { | ||
360 | global_ret = 1; | ||
361 | } | ||
362 | GNUNET_free_nz ((void *) argv); | ||
363 | return global_ret; | ||
364 | } | ||
365 | |||
366 | |||
367 | /* end of gnunet-nat-auto.c */ | ||