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3 Copyright (C) 2007, 2009, 2011, 2012, 2015 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_identity_service.h"
30 #include "gnunet_namestore_service.h"
31 #include "gnunet_gnsrecord_lib.h"
32 #include "gnunet_gns_service.h"
33 #include "gnunet_testing_lib.h"
36 #define TEST_DOMAIN "www.gnu"
38 #define TIMEOUT GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 300)
41 * Return value for #main().
43 static int global_ret;
45 static struct GNUNET_NAMESTORE_Handle *namestore;
47 static struct MHD_Daemon *mhd;
49 static struct GNUNET_SCHEDULER_Task *mhd_task_id;
51 static struct GNUNET_SCHEDULER_Task *curl_task_id;
53 static struct GNUNET_IDENTITY_Handle *identity;
55 static struct GNUNET_NAMESTORE_QueueEntry *qe;
63 static struct GNUNET_PeerIdentity id;
66 * IP address of the ultimate destination.
68 static const char *dest_ip;
71 * Address family of the dest_ip.
76 * Address family to use by the curl client.
89 static struct CBC cbc;
93 copy_buffer (void *ptr, size_t size, size_t nmemb, void *ctx)
95 struct CBC *cbc = ctx;
97 if (cbc->pos + size * nmemb > sizeof(cbc->buf))
98 return 0; /* overflow */
99 memcpy (&cbc->buf[cbc->pos], ptr, size * nmemb);
100 cbc->pos += size * nmemb;
107 struct MHD_Connection *connection,
111 const char *upload_data, size_t *upload_data_size,
115 struct MHD_Response *response;
118 if (0 != strcmp ("GET", method))
119 return MHD_NO; /* unexpected method */
126 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "MHD sends respose for request to URL `%s'\n", url);
127 response = MHD_create_response_from_buffer (strlen (url),
129 MHD_RESPMEM_MUST_COPY);
130 ret = MHD_queue_response (connection, MHD_HTTP_OK, response);
131 MHD_destroy_response (response);
139 do_shutdown (void *cls,
140 const struct GNUNET_SCHEDULER_TaskContext *c)
142 if (mhd_task_id != NULL)
144 GNUNET_SCHEDULER_cancel (mhd_task_id);
147 if (curl_task_id != NULL)
149 GNUNET_SCHEDULER_cancel (curl_task_id);
154 MHD_stop_daemon (mhd);
157 if (NULL != identity)
159 GNUNET_IDENTITY_disconnect (identity);
164 GNUNET_NAMESTORE_cancel (qe);
167 GNUNET_free_non_null (url);
173 * Function to run the HTTP client.
180 curl_task (void *cls,
181 const struct GNUNET_SCHEDULER_TaskContext *tc)
195 struct GNUNET_NETWORK_FDSet nrs;
196 struct GNUNET_NETWORK_FDSet nws;
197 struct GNUNET_TIME_Relative delay;
206 curl_multi_perform (multi, &running);
209 GNUNET_assert (NULL != (msg = curl_multi_info_read (multi, &running)));
210 if (msg->msg == CURLMSG_DONE)
212 if (msg->data.result != CURLE_OK)
215 "%s failed at %s:%d: `%s'\n",
216 "curl_multi_perform",
218 __LINE__, curl_easy_strerror (msg->data.result));
222 curl_multi_remove_handle (multi, curl);
223 curl_multi_cleanup (multi);
224 curl_easy_cleanup (curl);
227 if (cbc.pos != strlen ("/hello_world"))
232 if (0 != strncmp ("/hello_world", cbc.buf, strlen ("/hello_world")))
237 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Download complete, shutting down!\n");
238 GNUNET_SCHEDULER_shutdown ();
241 GNUNET_assert (CURLM_OK == curl_multi_fdset (multi, &rs, &ws, &es, &max));
242 if ( (CURLM_OK != curl_multi_timeout (multi, &timeout)) ||
244 delay = GNUNET_TIME_UNIT_SECONDS;
246 delay = GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MILLISECONDS, (unsigned int) timeout);
247 GNUNET_NETWORK_fdset_copy_native (&nrs,
250 GNUNET_NETWORK_fdset_copy_native (&nws,
253 curl_task_id = GNUNET_SCHEDULER_add_select (GNUNET_SCHEDULER_PRIORITY_DEFAULT,
263 start_curl (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
265 GNUNET_asprintf (&url,
266 "http://%s/hello_world",
268 curl = curl_easy_init ();
269 curl_easy_setopt (curl, CURLOPT_URL, url);
270 curl_easy_setopt (curl, CURLOPT_WRITEFUNCTION, ©_buffer);
271 curl_easy_setopt (curl, CURLOPT_WRITEDATA, &cbc);
272 curl_easy_setopt (curl, CURLOPT_FAILONERROR, 1);
273 curl_easy_setopt (curl, CURLOPT_TIMEOUT, 150L);
274 curl_easy_setopt (curl, CURLOPT_CONNECTTIMEOUT, 150L);
275 curl_easy_setopt (curl, CURLOPT_NOSIGNAL, 1);
277 multi = curl_multi_init ();
278 GNUNET_assert (multi != NULL);
279 GNUNET_assert (CURLM_OK == curl_multi_add_handle (multi, curl));
280 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
281 "Beginning HTTP download from `%s'\n",
288 disco_ns (void* cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
290 GNUNET_NAMESTORE_disconnect (namestore);
296 * Callback invoked from the namestore service once record is
300 * @param af address family, AF_INET or AF_INET6; AF_UNSPEC on error;
301 * will match 'result_af' from the request
302 * @param address IP address (struct in_addr or struct in_addr6, depending on 'af')
303 * that the VPN allocated for the redirection;
304 * traffic to this IP will now be redirected to the
305 * specified target peer; NULL on error
308 commence_testing (void *cls,
313 GNUNET_SCHEDULER_add_now (&disco_ns, NULL);
315 if ((emsg != NULL) && (GNUNET_YES != success))
318 "NS failed to create record %s\n",
320 GNUNET_SCHEDULER_shutdown ();
323 /* wait a little bit before downloading, as we just created the record */
324 GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_relative_multiply
325 (GNUNET_TIME_UNIT_SECONDS, 5),
332 * Function to keep the HTTP server running.
340 const struct GNUNET_SCHEDULER_TaskContext *tc)
351 struct GNUNET_NETWORK_FDSet nrs;
352 struct GNUNET_NETWORK_FDSet nws;
357 unsigned MHD_LONG_LONG timeout;
358 struct GNUNET_TIME_Relative delay;
360 GNUNET_assert (NULL == mhd_task_id);
365 GNUNET_assert (MHD_YES ==
366 MHD_get_fdset (mhd, &rs, &ws, &es, &max_fd));
367 if (MHD_YES == MHD_get_timeout (mhd, &timeout))
368 delay = GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MILLISECONDS,
369 (unsigned int) timeout);
371 delay = GNUNET_TIME_UNIT_FOREVER_REL;
372 GNUNET_NETWORK_fdset_copy_native (&nrs,
375 GNUNET_NETWORK_fdset_copy_native (&nws,
378 mhd_task_id = GNUNET_SCHEDULER_add_select (GNUNET_SCHEDULER_PRIORITY_DEFAULT,
390 * Open '/dev/null' and make the result the given
393 * @param target_fd desired FD to point to /dev/null
394 * @param flags open flags (O_RDONLY, O_WRONLY)
397 open_dev_null (int target_fd,
402 fd = open ("/dev/null", flags);
407 if (-1 == dup2 (fd, target_fd))
417 * Run the given command and wait for it to complete.
419 * @param file name of the binary to run
420 * @param cmd command line arguments (as given to 'execv')
421 * @return 0 on success, 1 on any error
424 fork_and_exec (const char *file,
441 /* we are the child process */
442 /* close stdin/stdout to not cause interference
443 with the helper's main protocol! */
445 open_dev_null (0, O_RDONLY);
447 open_dev_null (1, O_WRONLY);
448 (void) execv (file, cmd);
449 /* can only get here on error */
451 "exec `%s' failed: %s\n",
456 /* keep running waitpid as long as the only error we get is 'EINTR' */
457 while ( (-1 == (ret = waitpid (pid, &status, 0))) &&
462 "waitpid failed: %s\n",
466 if (! (WIFEXITED (status) && (0 == WEXITSTATUS (status))))
468 /* child process completed and returned success, we're happy */
475 * Method called to inform about the egos of this peer.
477 * When used with #GNUNET_IDENTITY_connect, this function is
478 * initially called for all egos and then again whenever a
479 * ego's name changes or if it is deleted. At the end of
480 * the initial pass over all egos, the function is once called
481 * with 'NULL' for @a ego. That does NOT mean that the callback won't
482 * be invoked in the future or that there was an error.
484 * When used with #GNUNET_IDENTITY_create or #GNUNET_IDENTITY_get,
485 * this function is only called ONCE, and 'NULL' being passed in
486 * @a ego does indicate an error (i.e. name is taken or no default
487 * value is known). If @a ego is non-NULL and if '*ctx'
488 * is set in those callbacks, the value WILL be passed to a subsequent
489 * call to the identity callback of #GNUNET_IDENTITY_connect (if
490 * that one was not NULL).
492 * When an identity is renamed, this function is called with the
493 * (known) @a ego but the NEW @a name.
495 * When an identity is deleted, this function is called with the
496 * (known) ego and "NULL" for the @a name. In this case,
497 * the @a ego is henceforth invalid (and the @a ctx should also be
501 * @param ego ego handle
502 * @param ctx context for application to store data for this ego
503 * (during the lifetime of this process, initially NULL)
504 * @param name name assigned by the user for this ego,
505 * NULL if the user just deleted the ego and it
506 * must thus no longer be used
509 identity_cb (void *cls,
510 struct GNUNET_IDENTITY_Ego *ego,
514 const struct GNUNET_CRYPTO_EcdsaPrivateKey *zone_key;
515 struct GNUNET_GNSRECORD_Data rd;
526 "Failed to find master-zone ego\n");
527 GNUNET_SCHEDULER_shutdown ();
530 GNUNET_IDENTITY_disconnect (identity);
534 GNUNET_assert (NULL != name);
535 if (0 != strcmp (name,
539 "Unexpected name %s\n",
543 zone_key = GNUNET_IDENTITY_ego_get_private_key (ego);
544 rd.expiration_time = GNUNET_TIME_UNIT_FOREVER_ABS.abs_value_us;
545 peername = GNUNET_strdup (GNUNET_i2s_full (&id));
546 GNUNET_asprintf (&rd_string,
550 GNUNET_free (peername);
551 GNUNET_assert (GNUNET_OK ==
552 GNUNET_GNSRECORD_string_to_value (GNUNET_GNSRECORD_TYPE_VPN,
556 rd.record_type = GNUNET_GNSRECORD_TYPE_VPN;
558 qe = GNUNET_NAMESTORE_records_store (namestore,
564 GNUNET_free ((void**)rd.data);
565 GNUNET_free (rd_string);
571 const struct GNUNET_CONFIGURATION_Handle *cfg,
572 struct GNUNET_TESTING_Peer *peer)
582 GNUNET_CONFIGURATION_get_value_string (cfg,
588 "Failed to locate configuration file. Skipping test.\n");
589 GNUNET_SCHEDULER_shutdown ();
593 char *const identity_args[] =
600 char *const identity2_args[] =
608 char *const identity3_args[] =
612 "-s", "gns-intercept",
616 char *const gns_args[] =
623 GNUNET_TESTING_peer_get_identity (peer, &id);
624 GNUNET_SCHEDULER_add_delayed (TIMEOUT,
627 bin = GNUNET_OS_installation_get_path (GNUNET_OS_IPK_BINDIR);
628 GNUNET_asprintf (&bin_identity,
632 if (0 != fork_and_exec (bin_identity, identity_args))
635 "Failed to run `gnunet-identity -C. Skipping test.\n");
636 GNUNET_SCHEDULER_shutdown ();
637 GNUNET_free (bin_identity);
638 GNUNET_free (config);
642 if (0 != fork_and_exec (bin_identity, identity2_args))
645 "Failed to run `gnunet-identity -e. Skipping test.\n");
646 GNUNET_SCHEDULER_shutdown ();
647 GNUNET_free (bin_identity);
648 GNUNET_free (config);
652 if (0 != fork_and_exec (bin_identity, identity3_args))
655 "Failed to run `gnunet-identity -e. Skipping test.\n");
656 GNUNET_SCHEDULER_shutdown ();
657 GNUNET_free (bin_identity);
658 GNUNET_free (config);
662 GNUNET_free (bin_identity);
664 /* do lookup just to launch GNS service */
665 GNUNET_asprintf (&bin_gns,
669 if (0 != fork_and_exec (bin_gns, gns_args))
672 "Failed to run `gnunet-gns -u. Skipping test.\n");
673 GNUNET_SCHEDULER_shutdown ();
674 GNUNET_free (bin_gns);
675 GNUNET_free (config);
679 GNUNET_free (config);
683 namestore = GNUNET_NAMESTORE_connect (cfg);
684 GNUNET_assert (NULL != namestore);
685 flags = MHD_USE_DEBUG;
686 if (GNUNET_YES == use_v6)
687 flags |= MHD_USE_DUAL_STACK;
688 mhd = MHD_start_daemon (flags,
693 GNUNET_assert (NULL != mhd);
696 identity = GNUNET_IDENTITY_connect (cfg,
703 main (int argc, char *const *argv)
712 char *const iptables_args[] =
714 "iptables", "-t", "mangle", "-L", "-v", NULL
717 if (0 == access ("/sbin/iptables", X_OK))
718 sbin_iptables = "/sbin/iptables";
719 else if (0 == access ("/usr/sbin/iptables", X_OK))
720 sbin_iptables = "/usr/sbin/iptables";
724 "Executable iptables not found in approved directories: %s, skipping\n",
729 if (0 != fork_and_exec (sbin_iptables, iptables_args))
732 "Failed to run `iptables -t mangle -L -v'. Skipping test.\n");
736 if (0 != ACCESS ("/dev/net/tun", R_OK))
738 GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_ERROR,
742 "WARNING: System unable to run test, skipping.\n");
746 bin_vpn = GNUNET_OS_get_libexec_binary_path ("gnunet-helper-vpn");
747 bin_exit = GNUNET_OS_get_libexec_binary_path ("gnunet-helper-exit");
748 bin_dns = GNUNET_OS_get_libexec_binary_path ("gnunet-helper-dns");
749 srv_dns = GNUNET_OS_get_libexec_binary_path ("gnunet-service-dns");
750 if ( (0 != geteuid ()) &&
752 GNUNET_OS_check_helper_binary (bin_vpn, GNUNET_YES, "-d gnunet-vpn - - 169.1.3.3.7 255.255.255.0")) || //ipv4 only please!
754 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
756 GNUNET_OS_check_helper_binary (bin_dns, GNUNET_YES, NULL))) ) // TODO: once we have a windows-testcase, add test parameters here
759 "WARNING: gnunet-helper-{exit,vpn,dns} binaries in $PATH are not SUID, refusing to run test (as it would have to fail).\n");
761 "Change $PATH ('.' in $PATH before $GNUNET_PREFIX/bin is problematic) or permissions (run 'make install' as root) to fix this!\n");
762 GNUNET_free (bin_vpn);
763 GNUNET_free (bin_exit);
764 GNUNET_free (bin_dns);
765 GNUNET_free (srv_dns);
768 GNUNET_free (bin_vpn);
769 GNUNET_free (bin_exit);
771 if ( (0 != stat (bin_dns, &s)) ||
772 (my_gid == s.st_gid) ||
773 ( (0 == (S_ISUID & s.st_mode)) && (0 != getuid()) ) )
776 "WARNING: %s has wrong permissions (%d, %d, %d), refusing to run test (as it would have to fail).\n",
778 (0 != stat (bin_dns, &s)),
779 (my_gid == s.st_gid),
780 (0 == (S_ISUID & s.st_mode)) || (0 != getuid()) );
781 GNUNET_free (bin_dns);
782 GNUNET_free (srv_dns);
785 if ( (0 != stat (srv_dns, &s)) ||
786 (my_gid == s.st_gid) ||
787 (0 == (S_ISGID & s.st_mode)) )
790 "WARNING: %s has wrong permissions (%d, %d, %d), refusing to run test (as it would have to fail).\n",
792 (0 != stat (bin_dns, &s)),
793 (my_gid == s.st_gid),
794 (0 == (S_ISGID & s.st_mode)) );
795 GNUNET_free (bin_dns);
796 GNUNET_free (srv_dns);
799 GNUNET_free (bin_dns);
800 GNUNET_free (srv_dns);
802 dest_ip = "169.254.86.1";
806 if (GNUNET_OK == GNUNET_NETWORK_test_pf (PF_INET6))
811 if ( (GNUNET_OK != GNUNET_NETWORK_test_pf (src_af)) ||
812 (GNUNET_OK != GNUNET_NETWORK_test_pf (dest_af)) )
815 "Required address families not supported by this system, skipping test.\n");
818 if (0 != curl_global_init (CURL_GLOBAL_WIN32))
820 fprintf (stderr, "failed to initialize curl\n");
825 if (0 != GNUNET_TESTING_peer_run ("test-gnunet-vpn",
829 GNUNET_DISK_directory_remove ("/tmp/gnunet-test-vpn");
833 /* end of test_gns_vpn.c */