GNUnet  0.11.x
gnunet-communicator-unix.c
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1 /*
2  This file is part of GNUnet
3  Copyright (C) 2010-2014, 2018 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 
29 #include "platform.h"
30 #include "gnunet_util_lib.h"
31 #include "gnunet_protocols.h"
32 #include "gnunet_constants.h"
33 #include "gnunet_nt_lib.h"
36 
45 #define DEFAULT_MAX_QUEUE_LENGTH 8000
46 
50 #define COMMUNICATOR_ADDRESS_PREFIX "unix"
51 
55 #define COMMUNICATOR_CONFIG_SECTION "communicator-unix"
56 
60 #ifndef DARWIN
61 #define UNIX_MTU UINT16_MAX
62 #else
63 #define UNIX_MTU 2048
64 #endif
65 
67 
72 {
77 
82 };
83 
85 
86 
90 struct Queue
91 {
95  struct Queue *next;
96 
100  struct Queue *prev;
101 
106 
110  struct sockaddr_un *address;
111 
115  socklen_t address_len;
116 
121  struct UNIXMessage *msg;
122 
126  struct GNUNET_MQ_Handle *mq;
127 
132 
136  unsigned long long bytes_in_queue;
137 
142 
147 };
148 
152 static struct GNUNET_PeerIdentity my_identity;
153 
158 
163 
167 static unsigned long long delivering_messages;
168 
172 static unsigned long long max_queue_length;
173 
178 
183 
188 
192 static struct Queue *queue_head;
193 
197 static struct Queue *queue_tail;
198 
203 
208 
209 
217 static void
219 {
220  struct GNUNET_MQ_Handle *mq;
221 
223  "Disconnecting queue for peer `%s'\n",
224  GNUNET_i2s (&queue->target));
225  if (0 != queue->bytes_in_queue)
226  {
228  queue->bytes_in_queue = 0;
229  }
230  if (NULL != (mq = queue->mq))
231  {
232  queue->mq = NULL;
234  }
235  GNUNET_assert (
236  GNUNET_YES ==
239  "# queues active",
241  GNUNET_NO);
242  if (NULL != queue->timeout_task)
243  {
244  GNUNET_SCHEDULER_cancel (queue->timeout_task);
245  queue->timeout_task = NULL;
246  }
247  GNUNET_free (queue->address);
248  GNUNET_free (queue);
249 }
250 
251 
257 static void
258 queue_timeout (void *cls)
259 {
260  struct Queue *queue = cls;
261  struct GNUNET_TIME_Relative left;
262 
263  queue->timeout_task = NULL;
264  left = GNUNET_TIME_absolute_get_remaining (queue->timeout);
265  if (0 != left.rel_value_us)
266  {
267  /* not actually our turn yet, but let's at least update
268  the monitor, it may think we're about to die ... */
269  queue->timeout_task =
271  return;
272  }
274  "Queue %p was idle for %s, disconnecting\n",
275  queue,
278  GNUNET_YES));
280 }
281 
282 
290 static void
292 {
293  GNUNET_assert (NULL != queue->timeout_task);
294  queue->timeout =
296 }
297 
298 
307 static struct sockaddr_un *
308 unix_address_to_sockaddr (const char *unixpath, socklen_t *sock_len)
309 {
310  struct sockaddr_un *un;
311  size_t slen;
312 
313  GNUNET_assert (0 < strlen (unixpath)); /* sanity check */
314  un = GNUNET_new (struct sockaddr_un);
315  un->sun_family = AF_UNIX;
316  slen = strlen (unixpath);
317  if (slen >= sizeof(un->sun_path))
318  slen = sizeof(un->sun_path) - 1;
319  GNUNET_memcpy (un->sun_path, unixpath, slen);
320  un->sun_path[slen] = '\0';
321  slen = sizeof(struct sockaddr_un);
322 #if HAVE_SOCKADDR_UN_SUN_LEN
323  un->sun_len = (u_char) slen;
324 #endif
325  (*sock_len) = slen;
326  if ('@' == un->sun_path[0])
327  un->sun_path[0] = '\0';
328  return un;
329 }
330 
331 
335 struct LookupCtx
336 {
340  struct Queue *res;
341 
345  const struct sockaddr_un *un;
346 
350  socklen_t un_len;
351 };
352 
353 
362 static int
363 lookup_queue_it (void *cls, const struct GNUNET_PeerIdentity *key, void *value)
364 {
365  struct LookupCtx *lctx = cls;
366  struct Queue *queue = value;
367 
368  if ((queue->address_len == lctx->un_len) &&
369  (0 == memcmp (lctx->un, queue->address, queue->address_len)))
370  {
371  lctx->res = queue;
372  return GNUNET_NO;
373  }
374  return GNUNET_YES;
375 }
376 
377 
385 static struct Queue *
387  const struct sockaddr_un *un,
388  socklen_t un_len)
389 {
390  struct LookupCtx lctx;
391 
392  lctx.un = un;
393  lctx.un_len = un_len;
394  lctx.res = NULL;
396  peer,
398  &lctx);
399  return lctx.res;
400 }
401 
402 
409 static void
410 select_write_cb (void *cls)
411 {
412  struct Queue *queue = queue_tail;
413  const struct GNUNET_MessageHeader *msg = &queue->msg->header;
414  size_t msg_size = ntohs (msg->size);
415  ssize_t sent;
416 
417  /* take queue of the ready list */
418  write_task = NULL;
419 resend:
420  /* Send the data */
422  msg,
423  msg_size,
424  (const struct sockaddr *) queue->address,
425  queue->address_len);
427  "UNIX transmitted message to %s (%d/%u: %s)\n",
428  GNUNET_i2s (&queue->target),
429  (int) sent,
430  (unsigned int) msg_size,
431  (sent < 0) ? strerror (errno) : "ok");
432  if (-1 != sent)
433  {
435  if (NULL != queue_head)
437  unix_sock,
439  NULL);
440 
441  /* send 'msg' */
442  GNUNET_free (queue->msg);
443  queue->msg = NULL;
446  "# bytes sent",
447  (long long) sent,
448  GNUNET_NO);
450  return; /* all good */
451  }
453  "# network transmission failures",
454  1,
455  GNUNET_NO);
457  unix_sock,
459  NULL);
460  switch (errno)
461  {
462  case EAGAIN:
463  case ENOBUFS:
464  /* We should retry later... */
466  return;
467 
468  case EMSGSIZE: {
469  socklen_t size = 0;
470  socklen_t len = sizeof(size);
471 
473  SOL_SOCKET,
474  SO_SNDBUF,
475  &size,
476  &len);
477  if (size > ntohs (msg->size))
478  {
479  /* Buffer is bigger than message: error, no retry
480  * This should never happen!*/
481  GNUNET_break (0);
482  return;
483  }
484  GNUNET_log (
486  "Trying to increase socket buffer size from %u to %u for message size %u\n",
487  (unsigned int) size,
488  (unsigned int) ((msg_size / 1000) + 2) * 1000,
489  (unsigned int) msg_size);
490  size = ((msg_size / 1000) + 2) * 1000;
492  SOL_SOCKET,
493  SO_SNDBUF,
494  &size,
495  sizeof(size)))
496  goto resend; /* Increased buffer size, retry sending */
497  /* Ok, then just try very modest increase */
498  size = msg_size;
500  SOL_SOCKET,
501  SO_SNDBUF,
502  &size,
503  sizeof(size)))
504  goto resend; /* Increased buffer size, retry sending */
505  /* Could not increase buffer size: error, no retry */
507  return;
508  }
509 
510  default:
512  return;
513  }
514 }
515 
516 
525 static void
527  const struct GNUNET_MessageHeader *msg,
528  void *impl_state)
529 {
530  struct Queue *queue = impl_state;
531  size_t msize = ntohs (msg->size);
532 
533  GNUNET_assert (mq == queue->mq);
534  GNUNET_assert (NULL == queue->msg);
535  // Convert to UNIXMessage
536  queue->msg = GNUNET_malloc (msize + sizeof (struct UNIXMessage));
537  queue->msg->header.size = htons (msize + sizeof (struct UNIXMessage));
538  queue->msg->sender = my_identity;
539  memcpy (&queue->msg[1], msg, msize);
541  GNUNET_assert (NULL != unix_sock);
542  if (NULL == write_task)
544  unix_sock,
546  NULL);
547 }
548 
549 
558 static void
559 mq_destroy (struct GNUNET_MQ_Handle *mq, void *impl_state)
560 {
561  struct Queue *queue = impl_state;
562 
563  if (mq == queue->mq)
564  {
565  queue->mq = NULL;
567  }
568 }
569 
570 
577 static void
578 mq_cancel (struct GNUNET_MQ_Handle *mq, void *impl_state)
579 {
580  struct Queue *queue = impl_state;
581 
582  GNUNET_assert (NULL != queue->msg);
583  queue->msg = NULL;
585  GNUNET_assert (NULL != write_task);
586  if (NULL == queue_head)
587  {
589  write_task = NULL;
590  }
591 }
592 
593 
603 static void
604 mq_error (void *cls, enum GNUNET_MQ_Error error)
605 {
606  struct Queue *queue = cls;
607 
609  "UNIX MQ error in queue to %s: %d\n",
610  GNUNET_i2s (&queue->target),
611  (int) error);
613 }
614 
615 
626 static struct Queue *
629  const struct sockaddr_un *un,
630  socklen_t un_len)
631 {
632  struct Queue *queue;
633 
634  queue = GNUNET_new (struct Queue);
635  queue->target = *target;
636  queue->address = GNUNET_memdup (un, un_len);
637  queue->address_len = un_len;
639  queue_map,
640  &queue->target,
641  queue,
644  "# queues active",
646  GNUNET_NO);
647  queue->timeout =
649  queue->timeout_task =
651  &queue_timeout,
652  queue);
654  &mq_destroy,
655  &mq_cancel,
656  queue,
657  NULL,
658  &mq_error,
659  queue);
660  {
661  char *foreign_addr;
662 
663  if ('\0' == un->sun_path[0])
664  GNUNET_asprintf (&foreign_addr,
665  "%s-@%s",
667  &un->sun_path[1]);
668  else
669  GNUNET_asprintf (&foreign_addr,
670  "%s-%s",
672  un->sun_path);
674  &queue->target,
675  foreign_addr,
676  UNIX_MTU - sizeof (struct
677  UNIXMessage),
679  0,
681  cs,
682  queue->mq);
683  GNUNET_free (foreign_addr);
684  }
685  return queue;
686 }
687 
688 
696 static void
697 select_read_cb (void *cls);
698 
699 
707 static void
708 receive_complete_cb (void *cls, int success)
709 {
710  (void) cls;
712  if (GNUNET_OK != success)
714  "# transport transmission failures",
715  1,
716  GNUNET_NO);
717  if ((NULL == read_task) && (delivering_messages < max_queue_length) &&
718  (NULL != unix_sock))
720  unix_sock,
722  NULL);
723 }
724 
725 
733 static void
734 select_read_cb (void *cls)
735 {
736  char buf[65536] GNUNET_ALIGN;
737  struct Queue *queue;
738  const struct UNIXMessage *msg;
739  struct sockaddr_un un;
740  socklen_t addrlen;
741  ssize_t ret;
742  uint16_t msize;
743 
744  GNUNET_assert (NULL != unix_sock);
746  unix_sock,
748  NULL);
749  addrlen = sizeof(un);
750  memset (&un, 0, sizeof(un));
752  buf,
753  sizeof(buf),
754  (struct sockaddr *) &un,
755  &addrlen);
756  if ((-1 == ret) && ((EAGAIN == errno) || (ENOBUFS == errno)))
757  return;
758  if (-1 == ret)
759  {
761  return;
762  }
764  "Read %d bytes from socket %s\n",
765  (int) ret,
766  un.sun_path);
767  GNUNET_assert (AF_UNIX == (un.sun_family));
768  msg = (struct UNIXMessage *) buf;
769  msize = ntohs (msg->header.size);
770  if ((msize < sizeof(struct UNIXMessage)) || (msize > ret))
771  {
773  "Wrong message size: %d bytes\n",
774  msize);
775  GNUNET_break_op (0);
776  return;
777  }
778  queue = lookup_queue (&msg->sender, &un, addrlen);
779  if (NULL == queue)
780  queue =
781  setup_queue (&msg->sender, GNUNET_TRANSPORT_CS_INBOUND, &un, addrlen);
782  else
784  if (NULL == queue)
785  {
786  GNUNET_log (
788  _ (
789  "Maximum number of UNIX connections exceeded, dropping incoming message\n"));
790  return;
791  }
792 
793  {
794  uint16_t tsize = msize - sizeof(struct UNIXMessage);
795 
796  const struct GNUNET_MessageHeader *currhdr;
797  struct GNUNET_MessageHeader al_hdr;
798 
799  currhdr = (const struct GNUNET_MessageHeader *) &msg[1];
800  /* ensure aligned access */
801  memcpy (&al_hdr, currhdr, sizeof(al_hdr));
802  if ((tsize < sizeof(struct GNUNET_MessageHeader)) ||
803  (tsize != ntohs (al_hdr.size)))
804  {
805  GNUNET_break_op (0);
806  return;
807  }
809  &msg->sender,
810  currhdr,
813  NULL);
814  if (GNUNET_SYSERR == ret)
815  {
817  "Transport not up!\n");
818  return; /* transport not up */
819  }
820  if (GNUNET_NO == ret)
821  {
823  "Error sending message to transport\n");
824  return;
825  }
827  }
829  {
831  "Back pressure %llu\n", delivering_messages);
832 
833  /* we should try to apply 'back pressure' */
835  read_task = NULL;
836  }
837 }
838 
839 
857 static int
858 mq_init (void *cls, const struct GNUNET_PeerIdentity *peer, const char *address)
859 {
860  struct Queue *queue;
861  const char *path;
862  struct sockaddr_un *un;
863  socklen_t un_len;
864 
865  (void) cls;
866  if (0 != strncmp (address,
868  strlen (COMMUNICATOR_ADDRESS_PREFIX "-")))
869  {
870  GNUNET_break_op (0);
871  return GNUNET_SYSERR;
872  }
873  path = &address[strlen (COMMUNICATOR_ADDRESS_PREFIX "-")];
874  un = unix_address_to_sockaddr (path, &un_len);
875  queue = lookup_queue (peer, un, un_len);
876  if (NULL != queue)
877  {
879  "Address `%s' for %s ignored, queue exists\n",
880  path,
881  GNUNET_i2s (peer));
882  GNUNET_free (un);
883  return GNUNET_OK;
884  }
886  GNUNET_free (un);
887  if (NULL == queue)
888  {
890  "Failed to setup queue to %s at `%s'\n",
891  GNUNET_i2s (peer),
892  path);
893  return GNUNET_NO;
894  }
895  return GNUNET_OK;
896 }
897 
898 
907 static int
909  const struct GNUNET_PeerIdentity *target,
910  void *value)
911 {
912  struct Queue *queue = value;
913 
914  (void) cls;
915  (void) target;
917  return GNUNET_OK;
918 }
919 
920 
926 static void
927 do_shutdown (void *cls)
928 {
929  if (NULL != read_task)
930  {
932  read_task = NULL;
933  }
934  if (NULL != write_task)
935  {
937  write_task = NULL;
938  }
939  if (NULL != unix_sock)
940  {
942  unix_sock = NULL;
943  }
946  if (NULL != ai)
947  {
949  ai = NULL;
950  }
951  if (NULL != ch)
952  {
954  ch = NULL;
955  }
956  if (NULL != stats)
957  {
959  stats = NULL;
960  }
961 }
962 
963 
975 static void
976 enc_notify_cb (void *cls,
977  const struct GNUNET_PeerIdentity *sender,
978  const struct GNUNET_MessageHeader *msg)
979 {
980  (void) cls;
981  (void) sender;
982  (void) msg;
983  GNUNET_break_op (0);
984 }
985 
986 
995 static void
996 run (void *cls,
997  char *const *args,
998  const char *cfgfile,
999  const struct GNUNET_CONFIGURATION_Handle *cfg)
1000 {
1001  char *unix_socket_path;
1002  struct sockaddr_un *un;
1003  socklen_t un_len;
1004  char *my_addr;
1006 
1007  (void) cls;
1008  delivering_messages = 0;
1009 
1011  if (NULL == my_private_key)
1012  {
1013  GNUNET_log (
1015  _ (
1016  "UNIX communicator is lacking key configuration settings. Exiting.\n"));
1018  return;
1019  }
1021 
1022  if (GNUNET_OK !=
1025  "UNIXPATH",
1026  &unix_socket_path))
1027  {
1030  "UNIXPATH");
1031  return;
1032  }
1033  if (GNUNET_OK !=
1036  "MAX_QUEUE_LENGTH",
1037  &max_queue_length))
1039 
1040  un = unix_address_to_sockaddr (unix_socket_path, &un_len);
1041  if (NULL == un)
1042  {
1044  "Failed to setup UNIX domain socket address with path `%s'\n",
1045  unix_socket_path);
1046  GNUNET_free (unix_socket_path);
1047  return;
1048  }
1049  unix_sock = GNUNET_NETWORK_socket_create (AF_UNIX, SOCK_DGRAM, 0);
1050  if (NULL == unix_sock)
1051  {
1053  GNUNET_free (un);
1054  GNUNET_free (unix_socket_path);
1055  return;
1056  }
1057  if (('\0' != un->sun_path[0]) &&
1059  {
1061  _ ("Cannot create path to `%s'\n"),
1062  un->sun_path);
1064  unix_sock = NULL;
1065  GNUNET_free (un);
1066  GNUNET_free (unix_socket_path);
1067  return;
1068  }
1070  (const struct sockaddr *) un,
1071  un_len))
1072  {
1073  GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_ERROR, "bind", un->sun_path);
1075  unix_sock = NULL;
1076  GNUNET_free (un);
1077  GNUNET_free (unix_socket_path);
1078  return;
1079  }
1080  GNUNET_free (un);
1081  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Bound to `%s'\n", unix_socket_path);
1082  stats = GNUNET_STATISTICS_create ("C-UNIX", cfg);
1085  unix_sock,
1086  &select_read_cb,
1087  NULL);
1093  &mq_init,
1094  NULL,
1095  &enc_notify_cb,
1096  NULL);
1097  if (NULL == ch)
1098  {
1099  GNUNET_break (0);
1101  GNUNET_free (unix_socket_path);
1102  return;
1103  }
1104  GNUNET_asprintf (&my_addr,
1105  "%s-%s",
1107  unix_socket_path);
1108  GNUNET_free (unix_socket_path);
1110  my_addr,
1113  GNUNET_free (my_addr);
1114 }
1115 
1116 
1124 int
1125 main (int argc, char *const *argv)
1126 {
1127  static const struct GNUNET_GETOPT_CommandLineOption options[] = {
1129  };
1130  int ret;
1131 
1132  if (GNUNET_OK != GNUNET_STRINGS_get_utf8_args (argc, argv, &argc, &argv))
1133  return 2;
1134 
1135  ret = (GNUNET_OK ==
1136  GNUNET_PROGRAM_run (argc,
1137  argv,
1138  "gnunet-communicator-unix",
1139  _ ("GNUnet UNIX domain socket communicator"),
1140  options,
1141  &run,
1142  NULL))
1143  ? 0
1144  : 1;
1145  GNUNET_free_nz ((void *) argv);
1146  return ret;
1147 }
1148 
1149 
1150 #if defined(__linux__) && defined(__GLIBC__)
1151 #include <malloc.h>
1152 
1156 void __attribute__ ((constructor))
1157 GNUNET_ARM_memory_init ()
1158 {
1159  mallopt (M_TRIM_THRESHOLD, 4 * 1024);
1160  mallopt (M_TOP_PAD, 1 * 1024);
1161  malloc_trim (0);
1162 }
1163 
1164 
1165 #endif
1166 
1167 /* end of gnunet-communicator-unix.c */
struct GNUNET_GETOPT_CommandLineOption GNUNET_GETOPT_OPTION_END
Definition: 002.c:13
struct GNUNET_GETOPT_CommandLineOption options[]
Definition: 002.c:5
struct GNUNET_MQ_Handle * mq
Definition: 003.c:5
struct GNUNET_MessageHeader * msg
Definition: 005.c:2
static const struct GNUNET_CONFIGURATION_Handle * cfg
Configuration we are using.
Definition: gnunet-abd.c:36
static int ret
Return value of the commandline.
Definition: gnunet-abd.c:81
#define UNIX_MTU
Our MTU.
static struct GNUNET_CONTAINER_MultiPeerMap * queue_map
Queues (map from peer identity to struct Queue)
static struct GNUNET_PeerIdentity my_identity
My Peer Identity.
static int get_queue_delete_it(void *cls, const struct GNUNET_PeerIdentity *target, void *value)
Iterator over all message queues to clean up.
#define COMMUNICATOR_ADDRESS_PREFIX
Address prefix used by the communicator.
static void mq_destroy(struct GNUNET_MQ_Handle *mq, void *impl_state)
Signature of functions implementing the destruction of a message queue.
static void queue_timeout(void *cls)
Queue was idle for too long, so disconnect it.
static struct sockaddr_un * unix_address_to_sockaddr(const char *unixpath, socklen_t *sock_len)
Convert unix path to a struct sockaddr_un *
static struct GNUNET_SCHEDULER_Task * write_task
ID of write task.
static struct Queue * queue_tail
Tail of queue of messages to transmit.
static struct GNUNET_STATISTICS_Handle * stats
For logging statistics.
static void queue_destroy(struct Queue *queue)
Functions with this signature are called whenever we need to close a queue due to a disconnect or fai...
static void receive_complete_cb(void *cls, int success)
Function called when message was successfully passed to transport service.
static void enc_notify_cb(void *cls, const struct GNUNET_PeerIdentity *sender, const struct GNUNET_MessageHeader *msg)
Function called when the transport service has received an acknowledgement for this communicator (!...
static void reschedule_queue_timeout(struct Queue *queue)
Increment queue timeout due to activity.
static void do_shutdown(void *cls)
Shutdown the UNIX communicator.
#define COMMUNICATOR_CONFIG_SECTION
Configuration section used by the communicator.
static struct GNUNET_TRANSPORT_AddressIdentifier * ai
Handle to the operation that publishes our address.
static struct GNUNET_TRANSPORT_CommunicatorHandle * ch
Our environment.
static unsigned long long max_queue_length
Maximum queue length before we stop reading towards the transport service.
static struct GNUNET_NETWORK_Handle * unix_sock
socket that we transmit all data with
static struct Queue * setup_queue(const struct GNUNET_PeerIdentity *target, enum GNUNET_TRANSPORT_ConnectionStatus cs, const struct sockaddr_un *un, socklen_t un_len)
Creates a new outbound queue the transport service will use to send data to another peer.
static struct GNUNET_SCHEDULER_Task * read_task
ID of read task.
static void mq_cancel(struct GNUNET_MQ_Handle *mq, void *impl_state)
Implementation function that cancels the currently sent message.
static int mq_init(void *cls, const struct GNUNET_PeerIdentity *peer, const char *address)
Function called by the transport service to initialize a message queue given address information abou...
static void run(void *cls, char *const *args, const char *cfgfile, const struct GNUNET_CONFIGURATION_Handle *cfg)
Setup communicator and launch network interactions.
static void select_write_cb(void *cls)
We have been notified that our socket is ready to write.
static struct Queue * lookup_queue(const struct GNUNET_PeerIdentity *peer, const struct sockaddr_un *un, socklen_t un_len)
Find an existing queue by address.
int main(int argc, char *const *argv)
The main function for the UNIX communicator.
static unsigned long long delivering_messages
Number of messages we currently have in our queues towards the transport service.
static void select_read_cb(void *cls)
We have been notified that our socket has something to read.
static struct Queue * queue_head
Head of queue of messages to transmit.
static int lookup_queue_it(void *cls, const struct GNUNET_PeerIdentity *key, void *value)
Function called to find a queue by address.
#define DEFAULT_MAX_QUEUE_LENGTH
How many messages do we keep at most in the queue to the transport service before we start to drop (d...
static void mq_error(void *cls, enum GNUNET_MQ_Error error)
Generic error handler, called with the appropriate error code and the same closure specified at the c...
static void mq_send(struct GNUNET_MQ_Handle *mq, const struct GNUNET_MessageHeader *msg, void *impl_state)
Signature of functions implementing the sending functionality of a message queue.
static char * address
GNS address for this phone.
struct GNUNET_HashCode key
The key used in the DHT.
enum RadiotapType __attribute__
uint16_t len
length of data (which is always a uint32_t, but presumably this can be used to specify that fewer byt...
static char * value
Value of the record to add/remove.
struct GNUNET_CRYPTO_EddsaPrivateKey * my_private_key
Own private key.
static char buf[2048]
static void queue(const char *hostname)
Add hostname to the list of requests to be made.
#define GNUNET_NETWORK_STRUCT_BEGIN
Define as empty, GNUNET_PACKED should suffice, but this won't work on W32.
#define GNUNET_log(kind,...)
#define GNUNET_NETWORK_STRUCT_END
Define as empty, GNUNET_PACKED should suffice, but this won't work on W32;.
#define GNUNET_ALIGN
gcc-ism to force alignment; we use this to align char-arrays that may then be cast to 'struct's.
#define GNUNET_memcpy(dst, src, n)
Call memcpy() but check for n being 0 first.
@ GNUNET_OK
Definition: gnunet_common.h:95
@ GNUNET_YES
Definition: gnunet_common.h:97
@ GNUNET_NO
Definition: gnunet_common.h:94
@ GNUNET_SYSERR
Definition: gnunet_common.h:93
enum GNUNET_GenericReturnValue GNUNET_CONFIGURATION_get_value_filename(const struct GNUNET_CONFIGURATION_Handle *cfg, const char *section, const char *option, char **value)
Get a configuration value that should be the name of a file or directory.
enum GNUNET_GenericReturnValue 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.
#define GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT
After how long do we consider a connection to a peer dead if we don't receive messages from the peer?
struct GNUNET_CRYPTO_EddsaPrivateKey * GNUNET_CRYPTO_eddsa_key_create_from_configuration(const struct GNUNET_CONFIGURATION_Handle *cfg)
Create a new private key by reading our peer's key from the file specified in the configuration.
void GNUNET_CRYPTO_eddsa_key_get_public(const struct GNUNET_CRYPTO_EddsaPrivateKey *priv, struct GNUNET_CRYPTO_EddsaPublicKey *pub)
Extract the public key for the given private key.
Definition: crypto_ecc.c:197
enum GNUNET_GenericReturnValue GNUNET_DISK_directory_create_for_file(const char *filename)
Create the directory structure for storing a file.
Definition: disk.c:582
#define GNUNET_CONTAINER_DLL_remove(head, tail, element)
Remove an element from a DLL.
#define GNUNET_CONTAINER_DLL_insert(head, tail, element)
Insert an element at the head of a DLL.
void GNUNET_CONTAINER_multipeermap_destroy(struct GNUNET_CONTAINER_MultiPeerMap *map)
Destroy a hash map.
int GNUNET_CONTAINER_multipeermap_iterate(struct GNUNET_CONTAINER_MultiPeerMap *map, GNUNET_CONTAINER_PeerMapIterator it, void *it_cls)
Iterate over all entries in the map.
struct GNUNET_CONTAINER_MultiPeerMap * GNUNET_CONTAINER_multipeermap_create(unsigned int len, int do_not_copy_keys)
Create a multi peer map (hash map for public keys of peers).
int GNUNET_CONTAINER_multipeermap_remove(struct GNUNET_CONTAINER_MultiPeerMap *map, const struct GNUNET_PeerIdentity *key, const void *value)
Remove the given key-value pair from the map.
int GNUNET_CONTAINER_multipeermap_get_multiple(struct GNUNET_CONTAINER_MultiPeerMap *map, const struct GNUNET_PeerIdentity *key, GNUNET_CONTAINER_PeerMapIterator it, void *it_cls)
Iterate over all entries in the map that match a particular key.
unsigned int GNUNET_CONTAINER_multipeermap_size(const struct GNUNET_CONTAINER_MultiPeerMap *map)
Get the number of key-value pairs in the map.
int GNUNET_CONTAINER_multipeermap_put(struct GNUNET_CONTAINER_MultiPeerMap *map, const struct GNUNET_PeerIdentity *key, void *value, enum GNUNET_CONTAINER_MultiHashMapOption opt)
Store a key-value pair in the map.
@ GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE
Allow multiple values with the same key.
#define GNUNET_break_op(cond)
Use this for assertion violations caused by other peers (i.e.
const char * GNUNET_i2s(const struct GNUNET_PeerIdentity *pid)
Convert a peer identity to a string (for printing debug messages).
#define GNUNET_assert(cond)
Use this for fatal errors that cannot be handled.
#define GNUNET_break(cond)
Use this for internal assertion violations that are not fatal (can be handled) but should not occur.
void GNUNET_log_config_missing(enum GNUNET_ErrorType kind, const char *section, const char *option)
Log error message about missing configuration option.
#define GNUNET_log_strerror(level, cmd)
Log an error message at log-level 'level' that indicates a failure of the command 'cmd' with the mess...
#define GNUNET_log_strerror_file(level, cmd, filename)
Log an error message at log-level 'level' that indicates a failure of the command 'cmd' with the mess...
@ GNUNET_ERROR_TYPE_WARNING
@ GNUNET_ERROR_TYPE_ERROR
@ GNUNET_ERROR_TYPE_DEBUG
@ GNUNET_ERROR_TYPE_INFO
int int GNUNET_asprintf(char **buf, const char *format,...) __attribute__((format(printf
Like asprintf, just portable.
#define GNUNET_new(type)
Allocate a struct or union of the given type.
#define GNUNET_malloc(size)
Wrapper around malloc.
#define GNUNET_free(ptr)
Wrapper around free.
#define GNUNET_free_nz(ptr)
Wrapper around free.
#define GNUNET_memdup(buf, size)
Allocate and initialize a block of memory.
GNUNET_MQ_Error
Error codes for the queue.
struct GNUNET_MQ_Handle * GNUNET_MQ_queue_for_callbacks(GNUNET_MQ_SendImpl send, GNUNET_MQ_DestroyImpl destroy, GNUNET_MQ_CancelImpl cancel, void *impl_state, const struct GNUNET_MQ_MessageHandler *handlers, GNUNET_MQ_ErrorHandler error_handler, void *cls)
Create a message queue for the specified handlers.
Definition: mq.c:565
void GNUNET_MQ_impl_send_continue(struct GNUNET_MQ_Handle *mq)
Call the send implementation for the next queued message, if any.
Definition: mq.c:499
void GNUNET_MQ_destroy(struct GNUNET_MQ_Handle *mq)
Destroy the message queue.
Definition: mq.c:837
ssize_t GNUNET_NETWORK_socket_recvfrom(const struct GNUNET_NETWORK_Handle *desc, void *buffer, size_t length, struct sockaddr *src_addr, socklen_t *addrlen)
Read data from a socket (always non-blocking).
Definition: network.c:754
int GNUNET_NETWORK_socket_getsockopt(const struct GNUNET_NETWORK_Handle *desc, int level, int optname, void *optval, socklen_t *optlen)
Get socket options.
Definition: network.c:683
struct GNUNET_NETWORK_Handle * GNUNET_NETWORK_socket_create(int domain, int type, int protocol)
Create a new socket.
Definition: network.c:907
int GNUNET_NETWORK_socket_setsockopt(struct GNUNET_NETWORK_Handle *fd, int level, int option_name, const void *option_value, socklen_t option_len)
Set socket option.
Definition: network.c:880
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:485
ssize_t GNUNET_NETWORK_socket_sendto(const struct GNUNET_NETWORK_Handle *desc, const void *message, size_t length, const struct sockaddr *dest_addr, socklen_t dest_len)
Send data to a particular destination (always non-blocking).
Definition: network.c:846
int GNUNET_NETWORK_socket_close(struct GNUNET_NETWORK_Handle *desc)
Close a socket.
Definition: network.c:560
@ GNUNET_NT_LOOPBACK
Loopback (same host).
Definition: gnunet_nt_lib.h:45
enum GNUNET_GenericReturnValue GNUNET_PROGRAM_run(int argc, char *const *argv, const char *binaryName, const char *binaryHelp, const struct GNUNET_GETOPT_CommandLineOption *options, GNUNET_PROGRAM_Main task, void *task_cls)
Run a standard GNUnet command startup sequence (initialize loggers and configuration,...
Definition: program.c:364
void GNUNET_SCHEDULER_shutdown(void)
Request the shutdown of a scheduler.
Definition: scheduler.c:531
struct GNUNET_SCHEDULER_Task * GNUNET_SCHEDULER_add_write_net(struct GNUNET_TIME_Relative delay, struct GNUNET_NETWORK_Handle *wfd, 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:1588
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:1517
struct GNUNET_SCHEDULER_Task * GNUNET_SCHEDULER_add_shutdown(GNUNET_SCHEDULER_TaskCallback task, void *task_cls)
Schedule a new task to be run on shutdown, that is when a CTRL-C signal is received,...
Definition: scheduler.c:1331
void * GNUNET_SCHEDULER_cancel(struct GNUNET_SCHEDULER_Task *task)
Cancel the task with the specified identifier.
Definition: scheduler.c:972
struct GNUNET_SCHEDULER_Task * GNUNET_SCHEDULER_add_delayed(struct GNUNET_TIME_Relative delay, GNUNET_SCHEDULER_TaskCallback task, void *task_cls)
Schedule a new task to be run with a specified delay.
Definition: scheduler.c:1269
struct GNUNET_STATISTICS_Handle * GNUNET_STATISTICS_create(const char *subsystem, const struct GNUNET_CONFIGURATION_Handle *cfg)
Get handle for the statistics service.
void GNUNET_STATISTICS_set(struct GNUNET_STATISTICS_Handle *handle, const char *name, uint64_t value, int make_persistent)
Set statistic value for the peer.
void GNUNET_STATISTICS_update(struct GNUNET_STATISTICS_Handle *handle, const char *name, int64_t delta, int make_persistent)
Set statistic value for the peer.
void GNUNET_STATISTICS_destroy(struct GNUNET_STATISTICS_Handle *h, int sync_first)
Destroy a handle (free all state associated with it).
enum GNUNET_GenericReturnValue GNUNET_STRINGS_get_utf8_args(int argc, char *const *argv, int *u8argc, char *const **u8argv)
Returns utf-8 encoded arguments.
Definition: strings.c:1209
#define GNUNET_TIME_UNIT_FOREVER_REL
Constant used to specify "forever".
struct GNUNET_TIME_Relative GNUNET_TIME_absolute_get_remaining(struct GNUNET_TIME_Absolute future)
Given a timestamp in the future, how much time remains until then?
Definition: time.c:232
struct GNUNET_TIME_Absolute GNUNET_TIME_relative_to_absolute(struct GNUNET_TIME_Relative rel)
Convert relative time to an absolute time in the future.
Definition: time.c:181
const char * GNUNET_STRINGS_relative_time_to_string(struct GNUNET_TIME_Relative delta, int do_round)
Give relative time in human-readable fancy format.
Definition: strings.c:557
void GNUNET_TRANSPORT_communicator_address_remove(struct GNUNET_TRANSPORT_AddressIdentifier *ai)
Notify transport service about an address that this communicator no longer provides for this peer.
int GNUNET_TRANSPORT_communicator_receive(struct GNUNET_TRANSPORT_CommunicatorHandle *handle, const struct GNUNET_PeerIdentity *sender, const struct GNUNET_MessageHeader *msg, struct GNUNET_TIME_Relative expected_addr_validity, GNUNET_TRANSPORT_MessageCompletedCallback cb, void *cb_cls)
Notify transport service that the communicator has received a message.
#define GNUNET_TRANSPORT_QUEUE_LENGTH_UNLIMITED
Queue length.
struct GNUNET_TRANSPORT_QueueHandle * GNUNET_TRANSPORT_communicator_mq_add(struct GNUNET_TRANSPORT_CommunicatorHandle *ch, const struct GNUNET_PeerIdentity *peer, const char *address, uint32_t mtu, uint64_t q_len, uint32_t priority, enum GNUNET_NetworkType nt, enum GNUNET_TRANSPORT_ConnectionStatus cs, struct GNUNET_MQ_Handle *mq)
Notify transport service that a MQ became available due to an "inbound" connection or because the com...
struct GNUNET_TRANSPORT_AddressIdentifier * GNUNET_TRANSPORT_communicator_address_add(struct GNUNET_TRANSPORT_CommunicatorHandle *ch, const char *address, enum GNUNET_NetworkType nt, struct GNUNET_TIME_Relative expiration)
Notify transport service about an address that this communicator provides for this peer.
void GNUNET_TRANSPORT_communicator_disconnect(struct GNUNET_TRANSPORT_CommunicatorHandle *ch)
Disconnect from the transport service.
GNUNET_TRANSPORT_ConnectionStatus
Possible states of a connection.
struct GNUNET_TRANSPORT_CommunicatorHandle * GNUNET_TRANSPORT_communicator_connect(const struct GNUNET_CONFIGURATION_Handle *cfg, const char *config_section_name, const char *addr_prefix, enum GNUNET_TRANSPORT_CommunicatorCharacteristics cc, GNUNET_TRANSPORT_CommunicatorMqInit mq_init, void *mq_init_cls, GNUNET_TRANSPORT_CommunicatorNotify notify_cb, void *notify_cb_cls)
Connect to the transport service.
@ GNUNET_TRANSPORT_CC_RELIABLE
Transmission is reliabile (with ACKs), e.g.
@ GNUNET_TRANSPORT_CS_INBOUND
this is an inbound connection (communicator initiated)
@ GNUNET_TRANSPORT_CS_OUTBOUND
this is an outbound connection (transport initiated)
static unsigned int size
Size of the "table".
Definition: peer.c:67
#define _(String)
GNU gettext support macro.
Definition: platform.h:177
Internal representation of the hash map.
Private ECC key encoded for transmission.
Definition of a command line option.
Handle to a message queue.
Definition: mq.c:86
Header for all communications.
uint16_t size
The length of the struct (in bytes, including the length field itself), in big-endian format.
handle to a socket
Definition: network.c:53
The identity of the host (wraps the signing key of the peer).
struct GNUNET_CRYPTO_EddsaPublicKey public_key
Entry in list of pending tasks.
Definition: scheduler.c:135
Handle for the service.
Time for absolute times used by GNUnet, in microseconds.
Time for relative time used by GNUnet, in microseconds.
uint64_t rel_value_us
The actual value.
Internal representation of an address a communicator is currently providing for the transport service...
Opaque handle to the transport service for communicators.
Handle returned to identify the internal data structure the transport API has created to manage a mes...
Closure to lookup_queue_it().
socklen_t un_len
Number of bytes in un.
const struct sockaddr_un * un
Address we are looking for.
struct Queue * res
Location to store the queue, if found.
Handle for a queue.
struct UNIXMessage * msg
Message currently scheduled for transmission, non-NULL if and only if this queue is in the queue_head...
struct GNUNET_TRANSPORT_QueueHandle * qh
handle for this queue with the ch.
socklen_t address_len
Length of the address.
struct GNUNET_MQ_Handle * mq
Message queue we are providing for the ch.
unsigned long long bytes_in_queue
Number of bytes we currently have in our write queue.
struct sockaddr_un * address
Address of the other peer.
struct GNUNET_SCHEDULER_Task * timeout_task
Queue timeout task.
struct GNUNET_TIME_Absolute timeout
Timeout for this queue.
struct GNUNET_PeerIdentity target
To whom are we talking to.
struct Queue * next
Queues with pending messages (!) are kept in a DLL.
enum GNUNET_TRANSPORT_ConnectionStatus cs
The connection status of this queue.
struct Queue * prev
Queues with pending messages (!) are kept in a DLL.
UNIX Message-Packet header.
struct GNUNET_MessageHeader header
Message header.
struct GNUNET_PeerIdentity sender
What is the identity of the sender (GNUNET_hash of public key)
struct GNUNET_TESTBED_Peer * peer
The peer associated with this model.