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3 Copyright (C) 2007, 2009, 2011, 2012 Christian Grothoff
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6 it under the terms of the GNU General Public License as published
7 by the Free Software Foundation; either version 3, or (at your
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11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with GNUnet; see the file COPYING. If not, write to the
17 Free Software Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA.
22 * @file test_gns_vpn.c
23 * @brief testcase for accessing VPN services via GNS
24 * @author Martin Schanzenbach
27 #include <curl/curl.h>
28 #include <microhttpd.h>
29 #include "gnunet_namestore_service.h"
30 #include "gnunet_gnsrecord_lib.h"
31 #include "gnunet_gns_service.h"
32 #include "gnunet_testing_lib.h"
35 #define TEST_DOMAIN "www.gnu"
37 #define TIMEOUT GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 300)
40 * Return value for 'main'.
42 static int global_ret;
44 static struct GNUNET_NAMESTORE_Handle *namestore;
46 static struct MHD_Daemon *mhd;
48 static struct GNUNET_SCHEDULER_Task * mhd_task_id;
50 static struct GNUNET_SCHEDULER_Task * curl_task_id;
59 * IP address of the ultimate destination.
61 static const char *dest_ip;
64 * Address family of the dest_ip.
69 * Address family to use by the curl client.
82 static struct CBC cbc;
86 copy_buffer (void *ptr, size_t size, size_t nmemb, void *ctx)
88 struct CBC *cbc = ctx;
90 if (cbc->pos + size * nmemb > sizeof(cbc->buf))
91 return 0; /* overflow */
92 memcpy (&cbc->buf[cbc->pos], ptr, size * nmemb);
93 cbc->pos += size * nmemb;
100 struct MHD_Connection *connection,
104 const char *upload_data, size_t *upload_data_size,
108 struct MHD_Response *response;
111 if (0 != strcmp ("GET", method))
112 return MHD_NO; /* unexpected method */
119 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MHD sends respose for request to URL `%s'\n", url);
120 response = MHD_create_response_from_buffer (strlen (url),
122 MHD_RESPMEM_MUST_COPY);
123 ret = MHD_queue_response (connection, MHD_HTTP_OK, response);
124 MHD_destroy_response (response);
134 if (mhd_task_id != NULL)
136 GNUNET_SCHEDULER_cancel (mhd_task_id);
139 if (curl_task_id != NULL)
141 GNUNET_SCHEDULER_cancel (curl_task_id);
146 MHD_stop_daemon (mhd);
149 GNUNET_free_non_null (url);
155 * Function to run the HTTP client.
162 curl_task (void *cls,
163 const struct GNUNET_SCHEDULER_TaskContext *tc)
177 struct GNUNET_NETWORK_FDSet nrs;
178 struct GNUNET_NETWORK_FDSet nws;
179 struct GNUNET_TIME_Relative delay;
188 curl_multi_perform (multi, &running);
191 GNUNET_assert (NULL != (msg = curl_multi_info_read (multi, &running)));
192 if (msg->msg == CURLMSG_DONE)
194 if (msg->data.result != CURLE_OK)
197 "%s failed at %s:%d: `%s'\n",
198 "curl_multi_perform",
200 __LINE__, curl_easy_strerror (msg->data.result));
204 curl_multi_remove_handle (multi, curl);
205 curl_multi_cleanup (multi);
206 curl_easy_cleanup (curl);
209 if (cbc.pos != strlen ("/hello_world"))
214 if (0 != strncmp ("/hello_world", cbc.buf, strlen ("/hello_world")))
219 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Download complete, shutting down!\n");
223 GNUNET_assert (CURLM_OK == curl_multi_fdset (multi, &rs, &ws, &es, &max));
224 if ( (CURLM_OK != curl_multi_timeout (multi, &timeout)) ||
226 delay = GNUNET_TIME_UNIT_SECONDS;
228 delay = GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MILLISECONDS, (unsigned int) timeout);
229 GNUNET_NETWORK_fdset_copy_native (&nrs,
232 GNUNET_NETWORK_fdset_copy_native (&nws,
235 curl_task_id = GNUNET_SCHEDULER_add_select (GNUNET_SCHEDULER_PRIORITY_DEFAULT,
245 start_curl (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
247 GNUNET_asprintf (&url,
248 "http://%s/hello_world",
250 curl = curl_easy_init ();
251 curl_easy_setopt (curl, CURLOPT_URL, url);
252 curl_easy_setopt (curl, CURLOPT_WRITEFUNCTION, ©_buffer);
253 curl_easy_setopt (curl, CURLOPT_WRITEDATA, &cbc);
254 curl_easy_setopt (curl, CURLOPT_FAILONERROR, 1);
255 curl_easy_setopt (curl, CURLOPT_TIMEOUT, 150L);
256 curl_easy_setopt (curl, CURLOPT_CONNECTTIMEOUT, 15L);
257 curl_easy_setopt (curl, CURLOPT_NOSIGNAL, 1);
259 multi = curl_multi_init ();
260 GNUNET_assert (multi != NULL);
261 GNUNET_assert (CURLM_OK == curl_multi_add_handle (multi, curl));
262 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Beginning HTTP download from `%s'\n", url);
268 disco_ns (void* cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
270 GNUNET_NAMESTORE_disconnect (namestore);
276 * Callback invoked from the namestore service once record is
280 * @param af address family, AF_INET or AF_INET6; AF_UNSPEC on error;
281 * will match 'result_af' from the request
282 * @param address IP address (struct in_addr or struct in_addr6, depending on 'af')
283 * that the VPN allocated for the redirection;
284 * traffic to this IP will now be redirected to the
285 * specified target peer; NULL on error
288 commence_testing (void *cls, int32_t success, const char *emsg)
290 GNUNET_SCHEDULER_add_now (&disco_ns, NULL);
292 if ((emsg != NULL) && (GNUNET_YES != success))
295 "NS failed to create record %s\n", emsg);
296 GNUNET_SCHEDULER_shutdown ();
299 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 10), &start_curl, NULL);
304 * Function to keep the HTTP server running.
312 const struct GNUNET_SCHEDULER_TaskContext *tc)
323 struct GNUNET_NETWORK_FDSet nrs;
324 struct GNUNET_NETWORK_FDSet nws;
329 unsigned MHD_LONG_LONG timeout;
330 struct GNUNET_TIME_Relative delay;
332 GNUNET_assert (NULL == mhd_task_id);
337 GNUNET_assert (MHD_YES ==
338 MHD_get_fdset (mhd, &rs, &ws, &es, &max_fd));
339 if (MHD_YES == MHD_get_timeout (mhd, &timeout))
340 delay = GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MILLISECONDS,
341 (unsigned int) timeout);
343 delay = GNUNET_TIME_UNIT_FOREVER_REL;
344 GNUNET_NETWORK_fdset_copy_native (&nrs,
347 GNUNET_NETWORK_fdset_copy_native (&nws,
350 mhd_task_id = GNUNET_SCHEDULER_add_select (GNUNET_SCHEDULER_PRIORITY_DEFAULT,
361 const struct GNUNET_CONFIGURATION_Handle *cfg,
362 struct GNUNET_TESTING_Peer *peer)
365 struct GNUNET_PeerIdentity id;
366 struct GNUNET_CRYPTO_HashAsciiEncoded peername;
367 struct GNUNET_CRYPTO_EcdsaPrivateKey *zone_key;
368 struct GNUNET_GNSRECORD_Data rd;
372 GNUNET_TESTING_peer_get_identity (peer, &id);
373 GNUNET_CRYPTO_hash_to_enc ((struct GNUNET_HashCode*)&id, &peername);
375 namestore = GNUNET_NAMESTORE_connect (cfg);
376 GNUNET_assert (NULL != namestore);
377 flags = MHD_USE_DEBUG;
378 //if (GNUNET_YES == use_v6)
379 // flags |= MHD_USE_IPv6;
380 mhd = MHD_start_daemon (flags,
385 GNUNET_assert (NULL != mhd);
388 if (GNUNET_OK != GNUNET_CONFIGURATION_get_value_filename (cfg, "gns",
392 GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
393 "Failed to get key from cfg\n");
397 zone_key = GNUNET_CRYPTO_ecdsa_key_create_from_file (zone_keyfile);
398 rd.expiration_time = GNUNET_TIME_UNIT_FOREVER_ABS.abs_value_us;
399 GNUNET_asprintf (&rd_string,
403 GNUNET_assert (GNUNET_OK == GNUNET_GNSRECORD_string_to_value (GNUNET_GNSRECORD_TYPE_VPN,
407 rd.record_type = GNUNET_GNSRECORD_TYPE_VPN;
409 GNUNET_NAMESTORE_records_store (namestore,
415 GNUNET_free ((void**)rd.data);
416 GNUNET_free (rd_string);
417 GNUNET_free (zone_keyfile);
418 GNUNET_free (zone_key);
423 * Open '/dev/null' and make the result the given
426 * @param target_fd desired FD to point to /dev/null
427 * @param flags open flags (O_RDONLY, O_WRONLY)
430 open_dev_null (int target_fd,
435 fd = open ("/dev/null", flags);
440 if (-1 == dup2 (fd, target_fd))
450 * Run the given command and wait for it to complete.
452 * @param file name of the binary to run
453 * @param cmd command line arguments (as given to 'execv')
454 * @return 0 on success, 1 on any error
457 fork_and_exec (const char *file,
474 /* we are the child process */
475 /* close stdin/stdout to not cause interference
476 with the helper's main protocol! */
478 open_dev_null (0, O_RDONLY);
480 open_dev_null (1, O_WRONLY);
481 (void) execv (file, cmd);
482 /* can only get here on error */
484 "exec `%s' failed: %s\n",
489 /* keep running waitpid as long as the only error we get is 'EINTR' */
490 while ( (-1 == (ret = waitpid (pid, &status, 0))) &&
495 "waitpid failed: %s\n",
499 if (! (WIFEXITED (status) && (0 == WEXITSTATUS (status))))
501 /* child process completed and returned success, we're happy */
506 main (int argc, char *const *argv)
512 char *const iptables_args[] =
514 "iptables", "-t", "mangle", "-L", "-v", NULL
517 if (0 == access ("/sbin/iptables", X_OK))
518 sbin_iptables = "/sbin/iptables";
519 else if (0 == access ("/usr/sbin/iptables", X_OK))
520 sbin_iptables = "/usr/sbin/iptables";
524 "Executable iptables not found in approved directories: %s, skipping\n",
529 if (0 != fork_and_exec (sbin_iptables, iptables_args))
532 "Failed to run `iptables -t mangle -L -v'. Skipping test.\n");
536 if (0 != ACCESS ("/dev/net/tun", R_OK))
538 GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_ERROR,
542 "WARNING: System unable to run test, skipping.\n");
546 bin_vpn = GNUNET_OS_get_libexec_binary_path ("gnunet-helper-vpn");
547 bin_exit = GNUNET_OS_get_libexec_binary_path ("gnunet-helper-exit");
548 bin_dns = GNUNET_OS_get_libexec_binary_path ("gnunet-helper-dns");
549 if ( (0 != geteuid ()) &&
551 GNUNET_OS_check_helper_binary (bin_vpn, GNUNET_YES, "-d gnunet-vpn - - 169.1.3.3.7 255.255.255.0")) || //ipv4 only please!
553 GNUNET_OS_check_helper_binary (bin_exit, GNUNET_YES, "-d gnunet-vpn - - - 169.1.3.3.7 255.255.255.0")) || //no nat, ipv4 only
555 GNUNET_OS_check_helper_binary (bin_dns, GNUNET_YES, NULL))) ) // TODO: once we have a windows-testcase, add test parameters here
558 "WARNING: gnunet-helper-{exit,vpn,dns} binaries in $PATH are not SUID, refusing to run test (as it would have to fail).\n");
560 "Change $PATH ('.' in $PATH before $GNUNET_PREFIX/bin is problematic) or permissions (run 'make install' as root) to fix this!\n");
561 GNUNET_free (bin_vpn);
562 GNUNET_free (bin_exit);
563 GNUNET_free (bin_dns);
566 GNUNET_free (bin_vpn);
567 GNUNET_free (bin_exit);
568 GNUNET_free (bin_dns);
570 dest_ip = "169.254.86.1";
574 if (GNUNET_OK == GNUNET_NETWORK_test_pf (PF_INET6))
579 if ( (GNUNET_OK != GNUNET_NETWORK_test_pf (src_af)) ||
580 (GNUNET_OK != GNUNET_NETWORK_test_pf (dest_af)) )
583 "Required address families not supported by this system, skipping test.\n");
586 if (0 != curl_global_init (CURL_GLOBAL_WIN32))
588 fprintf (stderr, "failed to initialize curl\n");
591 if (0 != GNUNET_TESTING_peer_run ("test-gnunet-vpn",
595 GNUNET_DISK_directory_remove ("/tmp/gnunet-test-vpn");
599 /* end of test_gns_vpn.c */