1 | /* |
1 | /* |
2 | gvpe.C -- the main file for gvpe |
2 | gvpe.C -- the main file for gvpe |
3 | Copyright (C) 1998-2002 Ivo Timmermans <ivo@o2w.nl> |
3 | Copyright (C) 1998-2002 Ivo Timmermans <ivo@o2w.nl> |
4 | 2000-2002 Guus Sliepen <guus@sliepen.eu.org> |
4 | 2000-2002 Guus Sliepen <guus@sliepen.eu.org> |
5 | 2003-2011 Marc Lehmann <gvpe@schmorp.de> |
5 | 2003-2013 Marc Lehmann <gvpe@schmorp.de> |
6 | |
6 | |
7 | This file is part of GVPE. |
7 | This file is part of GVPE. |
8 | |
8 | |
9 | GVPE is free software; you can redistribute it and/or modify it |
9 | GVPE is free software; you can redistribute it and/or modify it |
10 | under the terms of the GNU General Public License as published by the |
10 | under the terms of the GNU General Public License as published by the |
… | |
… | |
40 | #include <errno.h> |
40 | #include <errno.h> |
41 | #include <fcntl.h> |
41 | #include <fcntl.h> |
42 | #include <getopt.h> |
42 | #include <getopt.h> |
43 | #include <signal.h> |
43 | #include <signal.h> |
44 | #include <sys/types.h> |
44 | #include <sys/types.h> |
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45 | #include <sys/stat.h> |
45 | #include <unistd.h> |
46 | #include <unistd.h> |
46 | #include <signal.h> |
47 | #include <signal.h> |
47 | #include <termios.h> |
48 | #include <termios.h> |
48 | |
49 | |
49 | #if HAVE_SYS_MMAN_H |
50 | #if HAVE_SYS_MMAN_H |
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59 | #include "conf.h" |
60 | #include "conf.h" |
60 | #include "slog.h" |
61 | #include "slog.h" |
61 | #include "util.h" |
62 | #include "util.h" |
62 | #include "vpn.h" |
63 | #include "vpn.h" |
63 | #include "ev_cpp.h" |
64 | #include "ev_cpp.h" |
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65 | #include "hkdf.h" |
64 | |
66 | |
65 | static loglevel llevel = L_NONE; |
67 | static loglevel llevel = L_NONE; |
66 | |
68 | |
67 | /* If nonzero, display usage information and exit. */ |
69 | /* If nonzero, display usage information and exit. */ |
68 | static int show_help; |
70 | static int show_help; |
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206 | act.sa_flags = SA_RESETHAND; |
208 | act.sa_flags = SA_RESETHAND; |
207 | act.sa_handler = sigterm_handler; sigaction (SIGINT , &act, NULL); |
209 | act.sa_handler = sigterm_handler; sigaction (SIGINT , &act, NULL); |
208 | act.sa_handler = sigterm_handler; sigaction (SIGTERM, &act, NULL); |
210 | act.sa_handler = sigterm_handler; sigaction (SIGTERM, &act, NULL); |
209 | } |
211 | } |
210 | |
212 | |
211 | struct Xob {//D |
213 | static int rand_fd; |
212 | void wcbx () |
214 | |
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215 | // antique C++ requires external linkage :/ |
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216 | void |
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217 | reseed_rng (ev::timer &w, int revents) |
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218 | { |
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219 | char buf [SEED_SIZE]; |
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220 | int n = read (rand_fd, buf, sizeof (buf)); |
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221 | |
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222 | if (n > 0) |
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223 | RAND_seed (buf, n); |
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224 | } |
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225 | |
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226 | static void |
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227 | setup_rng (void) |
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228 | { |
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229 | if (!*conf.seed_dev) |
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230 | return; |
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231 | |
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232 | #ifndef O_BINARY |
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233 | # define O_BINARY 0 |
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234 | #endif |
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235 | #ifndef O_NONBLOCK |
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236 | # define O_NONBLOCK 0 |
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237 | #endif |
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238 | |
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239 | rand_fd = open (conf.seed_dev, O_RDONLY | O_NONBLOCK | O_BINARY); |
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240 | |
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241 | if (rand_fd < 0) |
213 | { |
242 | { |
214 | printf ("wcbx %p\n", pthread_self()); |
243 | slog (L_ERR, _("unable to open seed device '%s': %s, exiting."), conf.seed_dev, strerror (errno)); |
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244 | exit (EXIT_FAILURE); |
215 | } |
245 | } |
216 | void dcbx () |
246 | |
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247 | static ev::timer reseed_timer; |
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248 | |
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249 | if (conf.reseed) |
217 | { |
250 | { |
218 | printf ("dcbx %p\n", pthread_self()); |
251 | reseed_timer.set<reseed_rng> (); |
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252 | reseed_timer.set (conf.reseed, conf.reseed); |
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253 | reseed_timer.start (EV_DEFAULT); |
219 | } |
254 | } |
220 | }; |
255 | |
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256 | reseed_rng (reseed_timer, 0); |
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257 | } |
221 | |
258 | |
222 | int |
259 | int |
223 | main (int argc, char **argv, char **envp) |
260 | main (int argc, char **argv, char **envp) |
224 | { |
261 | { |
225 | ERR_load_crypto_strings (); // we have the RAM |
262 | ERR_load_crypto_strings (); // we have the RAM |
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263 | |
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264 | require (EVP_MD_size (MAC_DIGEST ()) == HASH_SIZE (MAC_DIGEST )); |
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265 | require (EVP_MD_size (AUTH_DIGEST ()) == HASH_SIZE (AUTH_DIGEST)); |
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266 | require (EVP_CIPHER_key_length (CIPHER ()) == KEY_SIZE (CIPHER )); |
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267 | require (EVP_CIPHER_block_size (CIPHER ()) == BLOCK_SIZE (CIPHER )); |
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268 | |
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269 | curve25519_verify (); |
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270 | hkdf::verify (); |
226 | |
271 | |
227 | set_loglevel (L_INFO); |
272 | set_loglevel (L_INFO); |
228 | set_identity (argv[0]); |
273 | set_identity (argv[0]); |
229 | log_to (LOGTO_SYSLOG | LOGTO_STDERR); |
274 | log_to (LOGTO_SYSLOG | LOGTO_STDERR); |
230 | |
275 | |
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241 | { |
286 | { |
242 | printf (_("%s version %s (built %s %s, protocol version %d.%d)\n"), get_identity (), |
287 | printf (_("%s version %s (built %s %s, protocol version %d.%d)\n"), get_identity (), |
243 | VERSION, __DATE__, __TIME__, PROTOCOL_MAJOR, PROTOCOL_MINOR); |
288 | VERSION, __DATE__, __TIME__, PROTOCOL_MAJOR, PROTOCOL_MINOR); |
244 | printf (_("Built with kernel interface %s/%s.\n"), IFTYPE, IFSUBTYPE); |
289 | printf (_("Built with kernel interface %s/%s.\n"), IFTYPE, IFSUBTYPE); |
245 | printf (_ |
290 | printf (_ |
246 | ("Copyright (C) 2003-2008 Marc Lehmann <gvpe@schmorp.de> and others.\n" |
291 | ("Copyright (C) 2003-2011 Marc Lehmann <gvpe@schmorp.de> and others.\n" |
247 | "See the AUTHORS file for a complete list.\n\n" |
292 | "See the AUTHORS file for a complete list.\n\n" |
248 | "GVPE comes with ABSOLUTELY NO WARRANTY. This is free software,\n" |
293 | "GVPE comes with ABSOLUTELY NO WARRANTY. This is free software,\n" |
249 | "and you are welcome to redistribute it under certain conditions;\n" |
294 | "and you are welcome to redistribute it under certain conditions;\n" |
250 | "see the file COPYING for details.\n")); |
295 | "see the file COPYING for details.\n")); |
251 | |
296 | |
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281 | configuration_parser (conf, true, argc, argv); |
326 | configuration_parser (conf, true, argc, argv); |
282 | } |
327 | } |
283 | |
328 | |
284 | set_loglevel (llevel != L_NONE ? llevel : conf.llevel); |
329 | set_loglevel (llevel != L_NONE ? llevel : conf.llevel); |
285 | |
330 | |
286 | RAND_load_file ("/dev/urandom", 1024); |
331 | setup_rng (); |
287 | |
332 | |
288 | if (!THISNODE) |
333 | if (!THISNODE) |
289 | { |
334 | { |
290 | slog (L_ERR, _("current node not set, or node '%s' not found in configfile, specify the nodename when starting gvpe."), |
335 | slog (L_ERR, _("current node not set, or node '%s' not found in configfile, specify the nodename when starting gvpe."), |
291 | thisnode ? thisnode : "<unset>"); |
336 | thisnode ? thisnode : "<unset>"); |
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296 | exit (EXIT_SUCCESS); |
341 | exit (EXIT_SUCCESS); |
297 | |
342 | |
298 | setup_signals (); |
343 | setup_signals (); |
299 | |
344 | |
300 | if (!network.setup ()) |
345 | if (!network.setup ()) |
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346 | if (network.drop_privileges ()) |
301 | { |
347 | { |
302 | ev_run (EV_DEFAULT_ 0); |
348 | ev_run (EV_DEFAULT_ 0); |
303 | cleanup_and_exit (EXIT_FAILURE); |
349 | cleanup_and_exit (EXIT_FAILURE); |
304 | } |
350 | } |
305 | |
351 | |
306 | slog (L_ERR, _("unrecoverable error while setting up network, exiting.")); |
352 | slog (L_CRIT, _("unrecoverable error while setting up network, exiting.")); |
307 | cleanup_and_exit (EXIT_FAILURE); |
353 | cleanup_and_exit (EXIT_FAILURE); |
308 | } |
354 | } |
309 | |
355 | |