GNUnet  0.10.x
gnunet-service-nat-auto_legacy.c
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1 /*
2  This file is part of GNUnet.
3  Copyright (C) 2015 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 
27 #include "platform.h"
28 #include "gnunet_util_lib.h"
30 #include "gnunet_nat_lib.h"
31 #include "nat.h"
32 
33 #define LOG(kind,...) GNUNET_log_from (kind, "nat", __VA_ARGS__)
34 
35 
39 #define TIMEOUT GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 15)
40 
41 #define NAT_SERVER_TIMEOUT GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 10)
42 
47 {
51  AUTO_INIT = 0,
52 
57 
62 
67 
72 
77 
82 
87 
92 
93 };
94 
95 
100 {
101 
106 
110  GNUNET_NAT_AutoResultCallback fin_cb;
111 
115  void *fin_cb_cls;
116 
121 
126 
131 
136 
141 
146 
151 
155  int have_v6;
156 
161 
166 
170  char *stun_ip;
171 
172  unsigned int stun_port;
173 
178 
183 };
184 
185 
190 
195 
199 static unsigned long long port = 7895;
200 
201 static char *stun_server = "stun.ekiga.net";
202 
203 static unsigned int stun_port = 3478;
204 
205 
211 static void
213 
214 
215 static void
216 process_stun_reply(struct sockaddr_in *answer,
217  struct GNUNET_NAT_AutoHandle *ah)
218 {
219  ah->stun_ip = inet_ntoa(answer->sin_addr);
220  ah->stun_port = ntohs (answer->sin_port);
222  "External IP is: %s , with port %u\n",
223  ah->stun_ip,
224  ah->stun_port);
225  next_phase (ah);
226 }
227 
228 
232 static void
234 {
236  "Stopping STUN and quitting...\n");
237  /* Clean task */
238  if (NULL != ltask4)
239  {
240  GNUNET_SCHEDULER_cancel (ltask4);
241  ltask4 = NULL;
242  }
243  /* Clean socket */
244  if (NULL != lsock4)
245  {
247  lsock4 = NULL;
248  }
249 }
250 
251 
258 static void
259 do_udp_read (void *cls)
260 {
261  struct GNUNET_NAT_AutoHandle *ah = cls;
262  unsigned char reply_buf[1024];
263  ssize_t rlen;
264  struct sockaddr_in answer;
265  const struct GNUNET_SCHEDULER_TaskContext *tc;
266 
268  if ((0 != (tc->reason & GNUNET_SCHEDULER_REASON_READ_READY)) &&
270  lsock4)))
271  {
272  rlen = GNUNET_NETWORK_socket_recv (lsock4,
273  reply_buf,
274  sizeof (reply_buf));
275 
276  //Lets handle the packet
277  memset (&answer, 0, sizeof(struct sockaddr_in));
278  if (ah->phase == AUTO_NAT_PUNCHED)
279  {
280  //Destroy the connection
283  "The external server was able to connect back");
285  next_phase (ah);
286  }
287  else
288  {
289  if (GNUNET_OK ==
290  GNUNET_NAT_stun_handle_packet (reply_buf, rlen, &answer))
291  {
292  //Process the answer
293  process_stun_reply (&answer, ah);
294  }
295  else
296  {
297  next_phase (ah);
298  }
299  }
300  }
301  else
302  {
304  "TIMEOUT while waiting for an answer\n");
305  if (ah->phase == AUTO_NAT_PUNCHED)
306  {
307  stop_stun();
308  }
309 
310  next_phase (ah);
311  }
312 }
313 
314 
320 static struct GNUNET_NETWORK_Handle *
322 {
323  struct GNUNET_NETWORK_Handle *ls;
324  struct sockaddr_in sa4;
325  int eno;
326 
327  memset (&sa4, 0, sizeof (sa4));
328  sa4.sin_family = AF_INET;
329  sa4.sin_port = htons (port);
330 #if HAVE_SOCKADDR_IN_SIN_LEN
331  sa4.sin_len = sizeof (sa4);
332 #endif
333  ls = GNUNET_NETWORK_socket_create (AF_INET,
334  SOCK_DGRAM,
335  0);
336  if (NULL == ls)
337  return NULL;
338  if (GNUNET_OK !=
339  GNUNET_NETWORK_socket_bind (ls, (const struct sockaddr *) &sa4,
340  sizeof (sa4)))
341  {
342  eno = errno;
344  errno = eno;
345  return NULL;
346  }
347  return ls;
348 }
349 
350 
351 static void
352 request_callback (void *cls,
354 {
355  // struct GNUNET_NAT_AutoHandle *ah = cls;
356 
358  "Request callback: stop and quit\n");
359  stop_stun ();
360 
361  // next_phase (ah); FIXME this always will be NULL, as called in test_stun()
362 }
363 
364 
373 static void
374 result_callback (void *cls,
376 {
377  struct GNUNET_NAT_AutoHandle *ah = cls;
378 
379  if (GNUNET_NAT_ERROR_SUCCESS == ret)
381  ah->tst = NULL;
382  ah->ret = ret;
385  ? _("NAT traversal with ICMP Server succeeded.\n")
386  : _("NAT traversal with ICMP Server failed.\n"));
387  GNUNET_CONFIGURATION_set_value_string (ah->cfg, "nat", "ENABLE_ICMP_SERVER",
388  GNUNET_NAT_ERROR_SUCCESS == ret ? "NO" : "YES");
389  next_phase (ah);
390 }
391 
392 
398 static void
399 reversal_test (void *cls)
400 {
401  struct GNUNET_NAT_AutoHandle *ah = cls;
402 
403  ah->task = NULL;
405  _("Testing connection reversal with ICMP server.\n"));
407  ah->tst = GNUNET_NAT_test_start (ah->cfg, GNUNET_YES, 0, 0, TIMEOUT,
408  &result_callback, ah);
409 }
410 
411 
420 static void
421 set_external_ipv4 (void *cls,
422  const struct in_addr *addr,
424 {
425  struct GNUNET_NAT_AutoHandle *ah = cls;
426  char buf[INET_ADDRSTRLEN];
427 
428  ah->eh = NULL;
429  ah->ret = ret;
430  if (GNUNET_NAT_ERROR_SUCCESS != ret)
431  {
432  next_phase (ah);
433  return;
434  }
435  /* enable 'behind nat' */
437  _("Detected external IP `%s'\n"),
438  inet_ntop (AF_INET,
439  addr,
440  buf,
441  sizeof (buf)));
442  GNUNET_CONFIGURATION_set_value_string (ah->cfg, "nat", "BEHIND_NAT", "YES");
443 
444  /* set external IP address */
445  if (NULL == inet_ntop (AF_INET, addr, buf, sizeof (buf)))
446  {
447  GNUNET_break (0);
448  /* actually, this should never happen, as the caller already executed just
449  * this check, but for consistency (eg: future changes in the caller)
450  * we still need to report this error...
451  */
453  next_phase (ah);
454  return;
455  }
456  GNUNET_CONFIGURATION_set_value_string (ah->cfg, "nat", "EXTERNAL_ADDRESS",
457  buf);
459  next_phase (ah);
460 }
461 
462 
468 static void
470 {
471  if (GNUNET_NAT_ERROR_SUCCESS != ah->ret)
472  next_phase (ah);
473 
474  // FIXME: CPS?
475  /* try to detect external IP */
476  ah->eh = GNUNET_NAT_mini_get_external_ipv4 (TIMEOUT,
477  &set_external_ipv4, ah);
478 }
479 
480 
486 static void
488 {
489 
490  GNUNET_log (GNUNET_ERROR_TYPE_INFO, "Running STUN test\n");
491 
492  /* Get port from the configuration */
493  if (GNUNET_OK !=
495  "transport-udp",
496  "PORT",
497  &port))
498  {
499  port = 2086;
500  }
501 
502  //Lets create the socket
503  lsock4 = bind_v4 ();
504  if (NULL == lsock4)
505  {
507  next_phase(ah);
508  return;
509  }
510  else
511  {
512  //Lets call our function now when it accepts
514  lsock4,
515  &do_udp_read,
516  ah);
517  }
518 
519 
521  "STUN service listens on port %u\n",
522  (unsigned int) port);
523  if (GNUNET_NO ==
525  stun_port,
526  lsock4,
528  NULL))
529  {
530  /*An error happened*/
531  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "STUN error, stopping\n");
532  stop_stun ();
533  next_phase (ah);
534  }
535 }
536 
537 
551 static int
552 process_if (void *cls,
553  const char *name,
554  int isDefault,
555  const struct sockaddr *addr,
556  const struct sockaddr *broadcast_addr,
557  const struct sockaddr *netmask,
558  socklen_t addrlen)
559 {
560  struct GNUNET_NAT_AutoHandle *ah = cls;
561  const struct sockaddr_in *in;
562  char buf[INET_ADDRSTRLEN];
563 
564 
565  if ( (sizeof (struct sockaddr_in6) == addrlen) &&
566  (0 != GNUNET_memcmp (&in6addr_loopback, &((const struct sockaddr_in6 *) addr)->sin6_addr)) &&
567  (! IN6_IS_ADDR_LINKLOCAL(&((const struct sockaddr_in6 *) addr)->sin6_addr)) )
568  {
569  ah->have_v6 = GNUNET_YES;
571  _("This system has a global IPv6 address, setting IPv6 to supported.\n"));
572 
573  return GNUNET_OK;
574  }
575  if (addrlen != sizeof (struct sockaddr_in))
576  return GNUNET_OK;
577  in = (const struct sockaddr_in *) addr;
578 
579 
580  /* set internal IP address */
581  if (NULL == inet_ntop (AF_INET, &in->sin_addr, buf, sizeof (buf)))
582  {
583  GNUNET_break (0);
584  return GNUNET_OK;
585  }
586  GNUNET_CONFIGURATION_set_value_string (ah->cfg, "nat", "INTERNAL_ADDRESS",
587  buf);
589  _("Detected internal network address `%s'.\n"),
590  buf);
591 
592 
594 
595  /* Check if our internal IP is the same as the External detect by STUN*/
596  if(ah->stun_ip && (strcmp(buf, ah->stun_ip) == 0) )
597  {
599  GNUNET_log (GNUNET_ERROR_TYPE_INFO,"A internal IP is the sameas the external");
600  /* No need to continue*/
601  return GNUNET_SYSERR;
602  }
603 
604  /* no need to continue iteration if we found the default */
605  if (!isDefault)
606  return GNUNET_OK;
607  else
608  return GNUNET_SYSERR;
609 }
610 
611 
617 static void
619 {
620  ah->have_v6 = GNUNET_NO;
621  ah->ret = GNUNET_NAT_ERROR_NO_VALID_IF_IP_COMBO; // reset to success if any of the IFs in below iterator has a valid IP
623 
624  GNUNET_CONFIGURATION_set_value_string (ah->cfg, "nat", "DISABLEV6",
625  (GNUNET_YES == ah->have_v6) ? "NO" : "YES");
626  next_phase (ah);
627 }
628 
629 
637 static void
638 mq_error_handler (void *cls,
639  enum GNUNET_MQ_Error error)
640 {
641  struct GNUNET_NAT_AutoHandle *ah = cls;
642 
643  GNUNET_MQ_destroy (ah->mq);
644  ah->mq = NULL;
645  /* wait a bit first? */
646  next_phase (ah);
647 }
648 
649 
655 static void
657 {
658  struct GNUNET_NAT_TestMessage *msg;
659  struct GNUNET_MQ_Envelope *env;
660 
661  if (! ah->stun_ip)
662  {
664  "We don't have a STUN IP");
665  next_phase (ah);
666  return;
667  }
668 
670  "Asking gnunet-nat-server to connect to `%s'\n",
671  ah->stun_ip);
672  ah->mq = GNUNET_CLIENT_connect (ah->cfg,
673  "gnunet-nat-server",
674  NULL,
676  ah);
677  if (NULL == ah->mq)
678  {
680  _("Failed to connect to `gnunet-nat-server'\n"));
681  next_phase (ah);
682  return;
683  }
684  env = GNUNET_MQ_msg (msg,
686  msg->dst_ipv4 = inet_addr (ah->stun_ip);
687  msg->dport = htons (ah->stun_port);
688  msg->data = port;
689  msg->is_tcp = htonl ((uint32_t) GNUNET_NO);
690  GNUNET_MQ_send (ah->mq,
691  env);
692  if (NULL != ltask4)
693  {
694  GNUNET_SCHEDULER_cancel (ltask4);
696  lsock4,
697  &do_udp_read,
698  ah);
699  }
700 }
701 
702 
708 static void
710 {
711 
712  int have_upnpc;
713 
714  if (GNUNET_NAT_ERROR_SUCCESS != ah->ret)
715  next_phase (ah);
716 
717  // test if upnpc is available
718  have_upnpc = (GNUNET_SYSERR !=
719  GNUNET_OS_check_helper_binary ("upnpc", GNUNET_NO, NULL));
720  //FIXME: test if upnpc is actually working, that is, if transports start to work once we use UPnP
722  (have_upnpc)
723  ? _("upnpc found, enabling its use\n")
724  : _("upnpc not found\n"));
725  GNUNET_CONFIGURATION_set_value_string (ah->cfg, "nat", "ENABLE_UPNP",
726  (GNUNET_YES == have_upnpc) ? "YES" : "NO");
727  next_phase (ah);
728 
729 }
730 
731 
737 static void
739 {
740 
741  int ext_ip;
742  int nated;
743  int binary;
744  char *tmp;
745  char *helper;
746  ext_ip = GNUNET_NO;
747  nated = GNUNET_NO;
748  binary = GNUNET_NO;
749 
750  tmp = NULL;
751  helper = GNUNET_OS_get_libexec_binary_path ("gnunet-helper-nat-server");
752  if ( (GNUNET_OK ==
754  "nat",
755  "EXTERNAL_ADDRESS",
756  &tmp)) &&
757  (0 < strlen (tmp)) )
758  {
759  ext_ip = GNUNET_OK;
761  _("test_icmp_server not possible, as we have no public IPv4 address\n"));
762  }
763  else
764  goto err;
765 
766  if (GNUNET_YES ==
768  "nat",
769  "BEHIND_NAT"))
770  {
771  nated = GNUNET_YES;
773  _("test_icmp_server not possible, as we are not behind NAT\n"));
774  }
775  else
776  goto err;
777 
778  if (GNUNET_YES ==
780  GNUNET_YES,
781  "-d 127.0.0.1" ))
782  {
783  binary = GNUNET_OK; // use localhost as source for that one udp-port, ok for testing
785  _("No working gnunet-helper-nat-server found\n"));
786  }
787 err:
788  GNUNET_free_non_null (tmp);
789  GNUNET_free (helper);
790 
791  if ( (GNUNET_OK == ext_ip) &&
792  (GNUNET_YES == nated) &&
793  (GNUNET_OK == binary) )
795  ah);
796  else
797  next_phase (ah);
798 }
799 
800 
806 static void
808 {
809  char *tmp;
810  char *helper;
811 
812  tmp = NULL;
813  helper = GNUNET_OS_get_libexec_binary_path ("gnunet-helper-nat-client");
814  if ( (GNUNET_OK ==
816  "nat",
817  "INTERNAL_ADDRESS",
818  &tmp)) &&
819  (0 < strlen (tmp)) )
820  {
822  _("test_icmp_client not possible, as we have no internal IPv4 address\n"));
823  }
824  else
825  goto err;
826 
827  if (GNUNET_YES !=
829  "nat",
830  "BEHIND_NAT"))
831  {
833  _("test_icmp_server not possible, as we are not behind NAT\n"));
834  }
835  else
836  goto err;
837 
838  if (GNUNET_YES ==
840  GNUNET_YES,
841  "-d 127.0.0.1 127.0.0.2 42"))
842  {
843  // none of these parameters are actually used in privilege testing mode
845  _("No working gnunet-helper-nat-server found\n"));
846  }
847 err:
848  GNUNET_free_non_null (tmp);
849  GNUNET_free (helper);
850 
851  next_phase (ah);
852 }
853 
854 
858 static void
860 {
861  struct GNUNET_CONFIGURATION_Handle *diff;
862 
863  ah->phase++;
864  switch (ah->phase)
865  {
866  case AUTO_INIT:
867  GNUNET_assert (0);
868  break;
869  case AUTO_EXTERNAL_IP:
871  "Will run AUTO_EXTERNAL_IP\n");
872  test_external_ip (ah);
873  break;
874  case AUTO_STUN:
876  "Will run AUTO_STUN\n");
877  test_stun (ah);
878  break;
879  case AUTO_LOCAL_IP:
881  "Will run AUTO_LOCAL_IP\n");
882  test_local_ip (ah);
883  break;
884  case AUTO_NAT_PUNCHED:
886  "Will run AUTO_NAT_PUNCHED\n");
887  test_nat_punched (ah);
888  break;
889  case AUTO_UPNPC:
891  "Will run AUTO_UPNPC\n");
892  test_upnpc (ah);
893  break;
894  case AUTO_ICMP_SERVER:
896  "Will run AUTO_ICMP_SERVER\n");
897  test_icmp_server (ah);
898  break;
899  case AUTO_ICMP_CLIENT:
901  "Will run AUTO_ICMP_CLIENT\n");
902  test_icmp_client (ah);
903  break;
904  case AUTO_DONE:
906  "Done with tests\n");
907  if (!ah->internal_ip_is_public)
908  {
910  "nat",
911  "BEHIND_NAT",
912  "YES");
913 
914  if (ah->connected_back)
915  {
917  "nat",
918  "PUNCHED_NAT",
919  "YES");
920  }
921  else
922  {
924  "nat",
925  "PUNCHED_NAT",
926  "NO");
927  }
928 
929  if (ah->stun_ip)
930  {
932  "nat",
933  "EXTERNAL_ADDRESS",
934  ah->stun_ip);
935  if (ah->connected_back)
936  {
939  "nat",
940  "USE_STUN",
941  "YES");
942  }
943  else
944  {
947  "nat",
948  "USE_STUN",
949  "NO");
950  }
951 
952  }
953  if (0 != ah->stun_port)
954  {
956  "transport-udp",
957  "ADVERTISED_PORT",
958  ah->stun_port);
959  }
960 
961  }
962  else
963  {
964  //The internal IP is the same as public, but we didn't got a incoming connection
965  if (ah->connected_back)
966  {
969  "nat",
970  "BEHIND_NAT",
971  "NO");
972  }
973  else
974  {
976  "nat",
977  "BEHIND_NAT",
978  "YES");
980  if (ah->stun_ip)
981  {
983  "nat",
984  "EXTERNAL_ADDRESS",
985  ah->stun_ip);
986  }
987  if (0 != ah->stun_port)
988  {
990  "transport-udp",
991  "ADVERTISED_PORT",
992  ah->stun_port);
993 
994  }
995  }
996  }
997 
999  ah->cfg);
1000 
1001 
1002  ah->fin_cb (ah->fin_cb_cls,
1003  diff,
1004  ah->ret,
1005  ah->type);
1008  }
1009 }
1010 
1011 
1021 struct GNUNET_NAT_AutoHandle *
1023  GNUNET_NAT_AutoResultCallback cb,
1024  void *cb_cls)
1025 {
1026  struct GNUNET_NAT_AutoHandle *ah;
1027 
1028  ah = GNUNET_new (struct GNUNET_NAT_AutoHandle);
1029  ah->fin_cb = cb;
1030  ah->fin_cb_cls = cb_cls;
1032  ah->cfg = GNUNET_CONFIGURATION_dup (cfg);
1034 
1035  /* never use loopback addresses if user wanted autoconfiguration */
1037  "nat",
1038  "USE_LOCALADDR",
1039  "NO");
1040 
1041  next_phase (ah);
1042  return ah;
1043 }
1044 
1045 
1051 void
1053 {
1054  if (NULL != ah->tst)
1055  {
1056  GNUNET_NAT_test_stop (ah->tst);
1057  ah->tst = NULL;
1058  }
1059  if (NULL != ah->eh)
1060  {
1061  GNUNET_NAT_mini_get_external_ipv4_cancel (ah->eh);
1062  ah->eh = NULL;
1063  }
1064  if (NULL != ah->mq)
1065  {
1066  GNUNET_MQ_destroy (ah->mq);
1067  ah->mq = NULL;
1068  }
1069  if (NULL != ah->task)
1070  {
1072  ah->task = NULL;
1073  }
1076  GNUNET_free (ah);
1077 }
1078 
1079 
1080 /* end of nat_auto.c */
Test if ICMP client works.
const struct GNUNET_SCHEDULER_TaskContext * GNUNET_SCHEDULER_get_task_context(void)
Obtain the reasoning why the current task was started.
Definition: scheduler.c:746
Last phase, we&#39;re done.
Initial start value.
static void test_stun(struct GNUNET_NAT_AutoHandle *ah)
Determine our external IPv4 address and port using an external STUN server.
#define LOG(kind,...)
Test if ICMP server works.
struct GNUNET_MessageHeader * msg
Definition: 005.c:2
enum GNUNET_NAT_StatusCode ret
Error code for better debugging and user feedback.
static struct GNUNET_SCHEDULER_Task * ltask4
The listen task ID for IPv4.
int GNUNET_CONFIGURATION_get_value_number(const struct GNUNET_CONFIGURATION_Handle *cfg, const char *section, const char *option, unsigned long long *number)
Get a configuration value that should be a number.
Opaque handle to cancel "GNUNET_NAT_mini_get_external_ipv4" operation.
struct GNUNET_NAT_STUN_Handle * GNUNET_NAT_stun_make_request(const char *server, uint16_t port, struct GNUNET_NETWORK_Handle *sock, GNUNET_NAT_TestCallback cb, void *cb_cls)
Make Generic STUN request.
Definition: nat_api_stun.c:212
uint32_t dst_ipv4
IPv4 target IP address.
Definition: nat.h:49
struct GNUNET_SCHEDULER_Task * task
Task identifier for the timeout.
struct GNUNET_MQ_Handle * GNUNET_CLIENT_connect(const struct GNUNET_CONFIGURATION_Handle *cfg, const char *service_name, const struct GNUNET_MQ_MessageHandler *handlers, GNUNET_MQ_ErrorHandler error_handler, void *error_handler_cls)
Create a message queue to connect to a GNUnet service.
Definition: client.c:901
The reading socket is ready.
Context information passed to each scheduler task.
GNUNET_MQ_Error
Error codes for the queue.
static void do_udp_read(void *cls)
Activity on our incoming socket.
ssize_t GNUNET_NETWORK_socket_recv(const struct GNUNET_NETWORK_Handle *desc, void *buffer, size_t length)
Read data from a connected socket (always non-blocking).
Definition: network.c:894
#define GNUNET_assert(cond)
Use this for fatal errors that cannot be handled.
int32_t is_tcp
GNUNET_YES for TCP, GNUNET_NO for UDP.
Definition: nat.h:64
static struct GNUNET_SCHEDULER_TaskContext tc
Task context of the current task.
Definition: scheduler.c:417
int GNUNET_NETWORK_socket_bind(struct GNUNET_NETWORK_Handle *desc, const struct sockaddr *address, socklen_t address_len)
Bind a socket to a particular address.
Definition: network.c:522
static void test_nat_punched(struct GNUNET_NAT_AutoHandle *ah)
Test if NAT has been punched.
struct GNUNET_NAT_ExternalHandle * eh
Handle for active &#39;GNUNET_NAT_mini_get_external_ipv4&#39;-operation.
void GNUNET_CONFIGURATION_set_value_number(struct GNUNET_CONFIGURATION_Handle *cfg, const char *section, const char *option, unsigned long long number)
Set a configuration value that should be a number.
#define GNUNET_MQ_msg(mvar, type)
Allocate a GNUNET_MQ_Envelope.
Definition: gnunet_mq_lib.h:67
#define GNUNET_MESSAGE_TYPE_NAT_TEST
Message to ask NAT server to perform traversal test.
#define GNUNET_NO
Definition: gnunet_common.h:81
#define GNUNET_OK
Named constants for return values.
Definition: gnunet_common.h:78
#define GNUNET_free_non_null(ptr)
Free the memory pointed to by ptr if ptr is not NULL.
const struct GNUNET_NETWORK_FDSet * read_ready
Set of file descriptors ready for reading; note that additional bits may be set that were not in the ...
int GNUNET_OS_check_helper_binary(const char *binary, int check_suid, const char *params)
Check whether an executable exists and possibly if the suid bit is set on the file.
#define GNUNET_new(type)
Allocate a struct or union of the given type.
void GNUNET_OS_network_interfaces_list(GNUNET_OS_NetworkInterfaceProcessor proc, void *proc_cls)
Enumerate all network interfaces.
Definition: os_network.c:388
enum GNUNET_NAT_Type type
Situation of the NAT.
static void reversal_test(void *cls)
Main function for the connection reversal test.
We are under a NAT but cannot traverse it.
enum GNUNET_SCHEDULER_Reason reason
Reason why the task is run now.
#define GNUNET_break(cond)
Use this for internal assertion violations that are not fatal (can be handled) but should not occur...
#define _(String)
GNU gettext support macro.
Definition: platform.h:208
uint16_t dport
Port to use, 0 to send dummy ICMP response.
Definition: nat.h:54
Handle to auto-configuration in progress.
struct GNUNET_NAT_Test * GNUNET_NAT_test_start(const struct GNUNET_CONFIGURATION_Handle *cfg, int is_tcp, uint16_t bnd_port, uint16_t adv_port, struct GNUNET_TIME_Relative timeout, GNUNET_NAT_TestCallback report, void *report_cls)
Start testing if NAT traversal works using the given configuration (IPv4-only).
Could not determine interface with internal/local network address.
void * fin_cb_cls
Closure for fin_cb.
#define GNUNET_log_strerror(level, cmd)
Log an error message at log-level &#39;level&#39; that indicates a failure of the command &#39;cmd&#39; with the mess...
static void mq_error_handler(void *cls, enum GNUNET_MQ_Error error)
We got disconnected from the NAT server.
static struct GNUNET_NETWORK_Handle * bind_v4()
Create an IPv4 listen socket bound to our port.
struct GNUNET_CONFIGURATION_Handle * GNUNET_CONFIGURATION_get_diff(const struct GNUNET_CONFIGURATION_Handle *cfg_default, const struct GNUNET_CONFIGURATION_Handle *cfg_new)
Compute configuration with only entries that have been changed.
int GNUNET_NAT_stun_handle_packet(struct GNUNET_NAT_Handle *nh, const struct sockaddr *sender_addr, size_t sender_addr_len, const void *data, size_t data_size)
Handle an incoming STUN message.
Definition: nat_api.c:581
struct GNUNET_SCHEDULER_Task * GNUNET_SCHEDULER_add_now(GNUNET_SCHEDULER_TaskCallback task, void *task_cls)
Schedule a new task to be run as soon as possible.
Definition: scheduler.c:1273
static void set_external_ipv4(void *cls, const struct in_addr *addr, enum GNUNET_NAT_StatusCode ret)
Set our external IPv4 address based on the UPnP.
int internal_ip_is_public
Internal IP is the same as the public one ?
GNUNET_NAT_StatusCode
Error Types for the NAT subsystem (which can then later be converted/resolved to a string) ...
void GNUNET_CONFIGURATION_destroy(struct GNUNET_CONFIGURATION_Handle *cfg)
Destroy configuration object.
static char buf[2048]
static int result
Global testing status.
void GNUNET_CONFIGURATION_set_value_string(struct GNUNET_CONFIGURATION_Handle *cfg, const char *section, const char *option, const char *value)
Set a configuration value that should be a string.
char * stun_ip
Address detected by STUN.
static unsigned long long port
The port the test service is running on (default 7895)
AutoPhase
Phases of the auto configuration.
static void next_phase(struct GNUNET_NAT_AutoHandle *ah)
Run the next phase of the auto test.
Test our external IP.
static void test_icmp_server(struct GNUNET_NAT_AutoHandle *ah)
Test if ICMP server is working.
static char * stun_server
int GNUNET_CONFIGURATION_get_value_string(const struct GNUNET_CONFIGURATION_Handle *cfg, const char *section, const char *option, char **value)
Get a configuration value that should be a string.
void GNUNET_NAT_test_stop(struct GNUNET_NAT_Test *tst)
Stop an active NAT test.
#define GNUNET_SYSERR
Definition: gnunet_common.h:79
int connected_back
Did the external server connected back ?
static void test_local_ip(struct GNUNET_NAT_AutoHandle *ah)
Determine our local IP addresses; detect internal IP & IPv6-support.
struct GNUNET_MQ_Handle * mq
Message queue to the gnunet-nat-server.
const char * name
struct GNUNET_NAT_AutoHandle * GNUNET_NAT_autoconfig_start(const struct GNUNET_CONFIGURATION_Handle *cfg, GNUNET_NAT_AutoResultCallback cb, void *cb_cls)
Start auto-configuration routine.
struct GNUNET_MQ_Envelope * env
Definition: 005.c:1
static void stop_stun()
Function that terminates the test.
struct GNUNET_NAT_Test * tst
Handle to the active NAT test.
static struct GNUNET_NETWORK_Handle * ls
Listen socket for STUN processing.
Definition: gnunet-nat.c:85
#define GNUNET_memcmp(a, b)
Compare memory in a and b, where both must be of the same pointer type.
Handle to a NAT test.
#define NAT_SERVER_TIMEOUT
struct GNUNET_CONFIGURATION_Handle * GNUNET_CONFIGURATION_dup(const struct GNUNET_CONFIGURATION_Handle *cfg)
Duplicate an existing configuration object.
static void result_callback(void *cls, enum GNUNET_NAT_StatusCode ret)
Function called by NAT to report the outcome of the nat-test.
Request to test NAT traversal, sent to the gnunet-nat-server (not the service!).
Definition: nat.h:39
static void test_external_ip(struct GNUNET_NAT_AutoHandle *ah)
Determine our external IPv4 address.
Handle to a message queue.
Definition: mq.c:85
Test if NAT was punched.
static struct GNUNET_NAT_AUTO_AutoHandle * ah
Handle to ongoing autoconfiguration.
Messages for interaction with gnunet-nat-server and gnunet-nat-service.
static void process_stun_reply(struct sockaddr_in *answer, struct GNUNET_NAT_AutoHandle *ah)
static void test_icmp_client(struct GNUNET_NAT_AutoHandle *ah)
Test if ICMP client is working.
configuration data
Definition: configuration.c:85
Test if UPnP is working.
struct GNUNET_CONFIGURATION_Handle * initial_cfg
Original configuration (used to calculate differences)
#define GNUNET_log(kind,...)
We have a direct connection.
Entry in list of pending tasks.
Definition: scheduler.c:134
char * GNUNET_OS_get_libexec_binary_path(const char *progname)
Given the name of a gnunet-helper, gnunet-service or gnunet-daemon binary, try to prefix it with the ...
handle to a socket
Definition: network.c:46
GNUNET_NAT_AutoResultCallback fin_cb
Function to call when done.
"no valid address was returned by `external-ip&#39;"
enum AutoPhase phase
Where are we in the test?
void GNUNET_MQ_destroy(struct GNUNET_MQ_Handle *mq)
Destroy the message queue.
Definition: mq.c:824
#define GNUNET_YES
Definition: gnunet_common.h:80
#define TIMEOUT
How long do we wait for the NAT test to report success?
struct GNUNET_SCHEDULER_Task * GNUNET_SCHEDULER_add_read_net(struct GNUNET_TIME_Relative delay, struct GNUNET_NETWORK_Handle *rfd, GNUNET_SCHEDULER_TaskCallback task, void *task_cls)
Schedule a new task to be run with a specified delay or when the specified file descriptor is ready f...
Definition: scheduler.c:1478
void GNUNET_MQ_send(struct GNUNET_MQ_Handle *mq, struct GNUNET_MQ_Envelope *ev)
Send a message with the given message queue.
Definition: mq.c:353
static void request_callback(void *cls, enum GNUNET_NAT_StatusCode result)
GNUNET_NAT_Type
What the situation of the NAT connectivity.
int upnp_set_external_address
UPnP already set the external ip address ?
int GNUNET_NETWORK_fdset_isset(const struct GNUNET_NETWORK_FDSet *fds, const struct GNUNET_NETWORK_Handle *desc)
Check whether a socket is part of the fd set.
Definition: network.c:1181
int GNUNET_CONFIGURATION_get_value_yesno(const struct GNUNET_CONFIGURATION_Handle *cfg, const char *section, const char *option)
Get a configuration value that should be in a set of "YES" or "NO".
Test our external IP.
static void test_upnpc(struct GNUNET_NAT_AutoHandle *ah)
Test if UPnPC works.
We can traverse using STUN.
Test our internal IP.
static int process_if(void *cls, const char *name, int isDefault, const struct sockaddr *addr, const struct sockaddr *broadcast_addr, const struct sockaddr *netmask, socklen_t addrlen)
Process list of local IP addresses.
int GNUNET_NETWORK_socket_close(struct GNUNET_NETWORK_Handle *desc)
Close a socket.
Definition: network.c:604
static struct GNUNET_NETWORK_Handle * lsock4
The listen socket of the service for IPv4.
void GNUNET_RESOLVER_connect(const struct GNUNET_CONFIGURATION_Handle *cfg)
Create the connection to the resolver service.
Definition: resolver_api.c:254
void GNUNET_NAT_autoconfig_cancel(struct GNUNET_NAT_AutoHandle *ah)
Abort autoconfiguration.
struct GNUNET_CONFIGURATION_Handle * cfg
Current configuration (with updates from previous phases)
#define GNUNET_free(ptr)
Wrapper around free.
uint16_t data
Data to send OR advertised-port (in NBO) to use for dummy ICMP.
Definition: nat.h:59
struct GNUNET_NETWORK_Handle * GNUNET_NETWORK_socket_create(int domain, int type, int protocol)
Create a new socket.
Definition: network.c:1037
void * GNUNET_SCHEDULER_cancel(struct GNUNET_SCHEDULER_Task *task)
Cancel the task with the specified identifier.
Definition: scheduler.c:965