GNUnet  0.10.x
transport_api2_communication.c
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1 /*
2  This file is part of GNUnet.
3  Copyright (C) 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 
26 #include "platform.h"
27 #include "gnunet_util_lib.h"
28 #include "gnunet_protocols.h"
31 #include "transport.h"
32 
33 
39 #define DEFAULT_MAX_QUEUE_LENGTH 16
40 
41 
46 {
50  struct FlowControl *next;
51 
55  struct FlowControl *prev;
56 
61 
65  void *cb_cls;
66 
71 
75  uint64_t id;
76 };
77 
78 
83 struct AckPending
84 {
88  struct AckPending *next;
89 
93  struct AckPending *prev;
94 
99 
103  struct GNUNET_PeerIdentity receiver;
104 
108  uint64_t mid;
109 };
110 
111 
116 {
121 
126 
131 
136 
141 
146 
151 
156 
161 
165  const char *config_section;
166 
170  const char *addr_prefix;
171 
177 
181  void *mq_init_cls;
182 
189 
194 
199 
203  unsigned long long max_queue_length;
204 
208  uint64_t fc_gen;
209 
214  uint32_t aid_gen;
215 
219  uint32_t queue_gen;
220 
225 };
226 
227 
233 {
234 
239 
244 
249 
253  char *address;
254 
259 
264 
269 
274 
278  uint32_t queue_id;
279 
283  uint32_t mtu;
284 };
285 
286 
292 {
293 
298 
303 
308 
312  char *address;
313 
319 
324  uint32_t aid;
325 
330 };
331 
332 
338 static void
340 
341 
348 static void
350 {
351  struct GNUNET_MQ_Envelope *env;
352  struct GNUNET_TRANSPORT_AddAddressMessage *aam;
353 
354  if (NULL == ai->ch->mq)
355  return;
356  env = GNUNET_MQ_msg_extra (aam,
357  strlen (ai->address) + 1,
359  aam->expiration = GNUNET_TIME_relative_hton (ai->expiration);
360  aam->nt = htonl ((uint32_t) ai->nt);
361  memcpy (&aam[1], ai->address, strlen (ai->address) + 1);
362  GNUNET_MQ_send (ai->ch->mq, env);
363 }
364 
365 
372 static void
374 {
375  struct GNUNET_MQ_Envelope *env;
376  struct GNUNET_TRANSPORT_DelAddressMessage *dam;
377 
378  if (NULL == ai->ch->mq)
379  return;
381  dam->aid = htonl (ai->aid);
382  GNUNET_MQ_send (ai->ch->mq, env);
383 }
384 
385 
392 static void
394 {
395  struct GNUNET_MQ_Envelope *env;
396  struct GNUNET_TRANSPORT_AddQueueMessage *aqm;
397 
398  if (NULL == qh->ch->mq)
399  return;
400  env = GNUNET_MQ_msg_extra (aqm,
401  strlen (qh->address) + 1,
403  aqm->qid = htonl (qh->queue_id);
404  aqm->receiver = qh->peer;
405  aqm->nt = htonl ((uint32_t) qh->nt);
406  aqm->mtu = htonl (qh->mtu);
407  aqm->cs = htonl ((uint32_t) qh->cs);
408  memcpy (&aqm[1], qh->address, strlen (qh->address) + 1);
409  GNUNET_MQ_send (qh->ch->mq, env);
410 }
411 
412 
419 static void
421 {
422  struct GNUNET_MQ_Envelope *env;
423  struct GNUNET_TRANSPORT_DelQueueMessage *dqm;
424 
425  if (NULL == qh->ch->mq)
426  return;
428  dqm->qid = htonl (qh->queue_id);
429  dqm->receiver = qh->peer;
430  GNUNET_MQ_send (qh->ch->mq, env);
431 }
432 
433 
442 static void
444 {
445  struct FlowControl *fcn;
446  struct AckPending *apn;
447 
448  for (struct FlowControl *fc = ch->fc_head; NULL != fc; fc = fcn)
449  {
450  fcn = fc->next;
452  fc->cb (fc->cb_cls, GNUNET_SYSERR);
453  GNUNET_free (fc);
454  }
455  for (struct AckPending *ap = ch->ap_head; NULL != ap; ap = apn)
456  {
457  apn = ap->next;
459  GNUNET_free (ap);
460  }
461  if (NULL == ch->mq)
462  return;
463  GNUNET_MQ_destroy (ch->mq);
464  ch->mq = NULL;
465 }
466 
467 
471 static void
472 error_handler (void *cls, enum GNUNET_MQ_Error error)
473 {
475 
477  "MQ failure %d, reconnecting to transport service.\n",
478  error);
479  disconnect (ch);
480  /* TODO: maybe do this with exponential backoff/delay */
481  reconnect (ch);
482 }
483 
484 
492 static void
494  void *cls,
495  const struct GNUNET_TRANSPORT_IncomingMessageAck *incoming_ack)
496 {
498 
499  for (struct FlowControl *fc = ch->fc_head; NULL != fc; fc = fc->next)
500  {
501  if ((fc->id == incoming_ack->fc_id) &&
502  (0 == memcmp (&fc->sender,
503  &incoming_ack->sender,
504  sizeof (struct GNUNET_PeerIdentity))))
505  {
507  fc->cb (fc->cb_cls, GNUNET_OK);
508  GNUNET_free (fc);
509  return;
510  }
511  }
512  GNUNET_break (0);
513  disconnect (ch);
514  /* TODO: maybe do this with exponential backoff/delay */
515  reconnect (ch);
516 }
517 
518 
527 static int
528 check_create_queue (void *cls, const struct GNUNET_TRANSPORT_CreateQueue *cq)
529 {
530  (void) cls;
532  return GNUNET_OK;
533 }
534 
535 
542 static void
543 handle_create_queue (void *cls, const struct GNUNET_TRANSPORT_CreateQueue *cq)
544 {
546  const char *addr = (const char *) &cq[1];
547  struct GNUNET_TRANSPORT_CreateQueueResponse *cqr;
548  struct GNUNET_MQ_Envelope *env;
549 
550  if (GNUNET_OK != ch->mq_init (ch->mq_init_cls, &cq->receiver, addr))
551  {
553  "Address `%s' invalid for this communicator\n",
554  addr);
556  }
557  else
558  {
560  }
561  cqr->request_id = cq->request_id;
562  GNUNET_MQ_send (ch->mq, env);
563 }
564 
565 
574 static int
575 check_send_msg (void *cls, const struct GNUNET_TRANSPORT_SendMessageTo *smt)
576 {
577  (void) cls;
579  return GNUNET_OK;
580 }
581 
582 
592 static void
594  int status,
595  const struct GNUNET_PeerIdentity *receiver,
596  uint64_t mid)
597 {
598  struct GNUNET_MQ_Envelope *env;
599  struct GNUNET_TRANSPORT_SendMessageToAck *ack;
600 
602  ack->status = htonl (status);
603  ack->mid = mid;
604  ack->receiver = *receiver;
605  GNUNET_MQ_send (ch->mq, env);
606 }
607 
608 
615 static void
616 send_ack_cb (void *cls)
617 {
618  struct AckPending *ap = cls;
620 
622  send_ack (ch, GNUNET_OK, &ap->receiver, ap->mid);
623  GNUNET_free (ap);
624 }
625 
626 
633 static void
634 handle_send_msg (void *cls, const struct GNUNET_TRANSPORT_SendMessageTo *smt)
635 {
637  const struct GNUNET_MessageHeader *mh;
638  struct GNUNET_MQ_Envelope *env;
639  struct AckPending *ap;
640  struct GNUNET_TRANSPORT_QueueHandle *qh;
641 
642  for (qh = ch->queue_head; NULL != qh; qh = qh->next)
643  if ((qh->queue_id == smt->qid) &&
644  (0 == memcmp (&qh->peer,
645  &smt->receiver,
646  sizeof (struct GNUNET_PeerIdentity))))
647  break;
648  if (NULL == qh)
649  {
650  /* queue is already gone, tell transport this one failed */
652  "Transmission failed, queue no longer exists.\n");
653  send_ack (ch, GNUNET_NO, &smt->receiver, smt->mid);
654  return;
655  }
656  ap = GNUNET_new (struct AckPending);
657  ap->ch = ch;
658  ap->receiver = smt->receiver;
659  ap->mid = smt->mid;
661  mh = (const struct GNUNET_MessageHeader *) &smt[1];
662  env = GNUNET_MQ_msg_copy (mh);
664  GNUNET_MQ_send (qh->mq, env);
665 }
666 
667 
676 static int
678  void *cls,
679  const struct GNUNET_TRANSPORT_CommunicatorBackchannelIncoming *bi)
680 {
681  (void) cls;
683  return GNUNET_OK;
684 }
685 
686 
693 static void
695  void *cls,
696  const struct GNUNET_TRANSPORT_CommunicatorBackchannelIncoming *bi)
697 {
699 
700  if (NULL != ch->notify_cb)
701  ch->notify_cb (ch->notify_cb_cls,
702  &bi->pid,
703  (const struct GNUNET_MessageHeader *) &bi[1]);
704  else
705  GNUNET_log (
707  _ ("Dropped backchanel message: handler not provided by communicator\n"));
708 }
709 
710 
716 static void
718 {
719  struct GNUNET_MQ_MessageHandler handlers[] =
720  {GNUNET_MQ_hd_fixed_size (incoming_ack,
722  struct GNUNET_TRANSPORT_IncomingMessageAck,
723  ch),
724  GNUNET_MQ_hd_var_size (create_queue,
726  struct GNUNET_TRANSPORT_CreateQueue,
727  ch),
730  struct GNUNET_TRANSPORT_SendMessageTo,
731  ch),
733  backchannel_incoming,
735  struct GNUNET_TRANSPORT_CommunicatorBackchannelIncoming,
736  ch),
738  struct GNUNET_TRANSPORT_CommunicatorAvailableMessage *cam;
739  struct GNUNET_MQ_Envelope *env;
740 
741  ch->mq =
742  GNUNET_CLIENT_connect (ch->cfg, "transport", handlers, &error_handler, ch);
743  if (NULL == ch->mq)
744  return;
745  env = GNUNET_MQ_msg_extra (cam,
746  strlen (ch->addr_prefix) + 1,
748  cam->cc = htonl ((uint32_t) ch->cc);
749  memcpy (&cam[1], ch->addr_prefix, strlen (ch->addr_prefix) + 1);
750  GNUNET_MQ_send (ch->mq, env);
751  for (struct GNUNET_TRANSPORT_AddressIdentifier *ai = ch->ai_head; NULL != ai;
752  ai = ai->next)
754  for (struct GNUNET_TRANSPORT_QueueHandle *qh = ch->queue_head; NULL != qh;
755  qh = qh->next)
756  send_add_queue (qh);
757 }
758 
759 
780  const struct GNUNET_CONFIGURATION_Handle *cfg,
781  const char *config_section,
782  const char *addr_prefix,
785  void *mq_init_cls,
787  void *notify_cb_cls)
788 {
790 
792  ch->cfg = cfg;
794  ch->addr_prefix = addr_prefix;
795  ch->mq_init = mq_init;
796  ch->mq_init_cls = mq_init_cls;
797  ch->notify_cb = notify_cb;
799  ch->cc = cc;
800  reconnect (ch);
801  if (GNUNET_OK !=
803  config_section,
804  "MAX_QUEUE_LENGTH",
805  &ch->max_queue_length))
807  if (NULL == ch->mq)
808  {
809  GNUNET_free (ch);
810  return NULL;
811  }
812  return ch;
813 }
814 
815 
821 void
824 {
825  disconnect (ch);
826  while (NULL != ch->ai_head)
827  {
828  GNUNET_break (0); /* communicator forgot to remove address, warn! */
830  }
831  GNUNET_free (ch);
832 }
833 
834 
835 /* ************************* Receiving *************************** */
836 
837 
858 int
861  const struct GNUNET_PeerIdentity *sender,
862  const struct GNUNET_MessageHeader *msg,
863  struct GNUNET_TIME_Relative expected_addr_validity,
865  void *cb_cls)
866 {
867  struct GNUNET_MQ_Envelope *env;
868  struct GNUNET_TRANSPORT_IncomingMessage *im;
869  uint16_t msize;
870 
871  if (NULL == ch->mq)
872  return GNUNET_SYSERR;
873  if ((NULL == cb) && (GNUNET_MQ_get_length (ch->mq) >= ch->max_queue_length))
874  {
875  GNUNET_log (
877  "Dropping message: transprot is too slow, queue length %llu exceeded\n",
878  ch->max_queue_length);
879  return GNUNET_NO;
880  }
881 
882  msize = ntohs (msg->size);
883  env =
885  if (NULL == env)
886  {
887  GNUNET_break (0);
888  return GNUNET_SYSERR;
889  }
890  im->expected_address_validity =
891  GNUNET_TIME_relative_hton (expected_addr_validity);
892  im->sender = *sender;
893  memcpy (&im[1], msg, msize);
894  if (NULL != cb)
895  {
896  struct FlowControl *fc;
897 
898  im->fc_on = htonl (GNUNET_YES);
899  im->fc_id = ch->fc_gen++;
900  fc = GNUNET_new (struct FlowControl);
901  fc->sender = *sender;
902  fc->id = im->fc_id;
903  fc->cb = cb;
904  fc->cb_cls = cb_cls;
906  }
907  GNUNET_MQ_send (ch->mq, env);
908  return GNUNET_OK;
909 }
910 
911 
912 /* ************************* Discovery *************************** */
913 
914 
934  const struct GNUNET_PeerIdentity *peer,
935  const char *address,
936  uint32_t mtu,
937  enum GNUNET_NetworkType nt,
939  struct GNUNET_MQ_Handle *mq)
940 {
941  struct GNUNET_TRANSPORT_QueueHandle *qh;
942 
944  qh->ch = ch;
945  qh->peer = *peer;
946  qh->address = GNUNET_strdup (address);
947  qh->nt = nt;
948  qh->mtu = mtu;
949  qh->cs = cs;
950  qh->mq = mq;
951  qh->queue_id = ch->queue_gen++;
953  send_add_queue (qh);
954  return qh;
955 }
956 
957 
964 void
966 {
968 
969  send_del_queue (qh);
971  GNUNET_MQ_destroy (qh->mq);
972  GNUNET_free (qh->address);
973  GNUNET_free (qh);
974 }
975 
976 
989  const char *address,
990  enum GNUNET_NetworkType nt,
992 {
994 
996  ai->ch = ch;
997  ai->address = GNUNET_strdup (address);
998  ai->nt = nt;
999  ai->expiration = expiration;
1000  ai->aid = ch->aid_gen++;
1002  send_add_address (ai);
1003  return ai;
1004 }
1005 
1006 
1013 void
1016 {
1018 
1019  send_del_address (ai);
1021  GNUNET_free (ai->address);
1022  GNUNET_free (ai);
1023 }
1024 
1025 
1026 /* ************************* Backchannel *************************** */
1027 
1028 
1043 void
1046  const struct GNUNET_PeerIdentity *pid,
1047  const char *comm,
1048  const struct GNUNET_MessageHeader *header)
1049 {
1050  struct GNUNET_MQ_Envelope *env;
1051  struct GNUNET_TRANSPORT_CommunicatorBackchannel *cb;
1052  size_t slen = strlen (comm) + 1;
1053  uint16_t mlen = ntohs (header->size);
1054 
1055  GNUNET_assert (mlen + slen + sizeof (*cb) < UINT16_MAX);
1056  env =
1057  GNUNET_MQ_msg_extra (cb,
1058  slen + mlen,
1060  cb->pid = *pid;
1061  memcpy (&cb[1], header, mlen);
1062  memcpy (((char *) &cb[1]) + mlen, comm, slen);
1063  GNUNET_MQ_send (ch->mq, env);
1064 }
1065 
1066 
1067 /* end of transport_api2_communication.c */
GNUNET_TRANSPORT_CommunicatorCharacteristics
What characteristics does this communicator have?
#define GNUNET_CONTAINER_DLL_remove(head, tail, element)
Remove an element from a DLL.
uint32_t aid_gen
Internal UUID for the address used in communication with the transport service.
enum GNUNET_NetworkType nt
Network type of the communciation queue.
static struct GNUNET_CADET_Channel * ch
Channel handle.
Definition: gnunet-cadet.c:117
struct GNUNET_MQ_Envelope * GNUNET_MQ_msg_copy(const struct GNUNET_MessageHeader *hdr)
Create a new envelope by copying an existing message.
Definition: mq.c:653
static void handle_send_msg(void *cls, const struct GNUNET_TRANSPORT_SendMessageTo *smt)
Transport service wants us to send a message.
struct GNUNET_PeerIdentity receiver
Which peer is this about?
#define GNUNET_MESSAGE_TYPE_TRANSPORT_SEND_MSG
transport tells communicator it wants to transmit
struct GNUNET_MessageHeader * msg
Definition: 005.c:2
static void send_add_queue(struct GNUNET_TRANSPORT_QueueHandle *qh)
Send message to the transport service about queue qh being now available.
static char * expiration
Credential TTL.
#define GNUNET_MESSAGE_TYPE_TRANSPORT_QUEUE_CREATE
transport tells communicator it wants a queue
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.
uint64_t id
More-or-less unique ID for the message.
unsigned long long max_queue_length
Maximum permissable queue length.
#define GNUNET_CONTAINER_DLL_insert(head, tail, element)
Insert an element at the head of a DLL.
common internal definitions for transport service
static void send_ack_cb(void *cls)
Message queue transmission by communicator was successful, notify transport service.
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
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...
#define GNUNET_MESSAGE_TYPE_TRANSPORT_QUEUE_CREATE_OK
Response from communicator: will try to create queue.
GNUNET_MQ_Error
Error codes for the queue.
char * address
Address used by the communication queue.
static void handle_backchannel_incoming(void *cls, const struct GNUNET_TRANSPORT_CommunicatorBackchannelIncoming *bi)
Transport service gives us backchannel message.
uint32_t queue_id
ID for this queue when talking to the transport service.
#define GNUNET_assert(cond)
Use this for fatal errors that cannot be handled.
static struct GNUNET_CADET_Handle * mh
Cadet handle.
Definition: gnunet-cadet.c:92
struct GNUNET_TRANSPORT_QueueHandle * next
Kept in a DLL.
const char * config_section
Config section to use.
#define GNUNET_MQ_hd_fixed_size(name, code, str, ctx)
struct GNUNET_TRANSPORT_AddressIdentifier * next
Kept in a DLL.
GNUNET_TRANSPORT_MessageCompletedCallback cb
Function to call once the message was processed.
#define GNUNET_MQ_msg(mvar, type)
Allocate a GNUNET_MQ_Envelope.
Definition: gnunet_mq_lib.h:67
#define GNUNET_NO
Definition: gnunet_common.h:81
#define GNUNET_OK
Named constants for return values.
Definition: gnunet_common.h:78
#define GNUNET_new(type)
Allocate a struct or union of the given type.
GNUNET_TRANSPORT_CommunicatorNotify notify_cb
Function to call when the transport service receives messages for a communicator (i.e.
void(* GNUNET_TRANSPORT_CommunicatorNotify)(void *cls, const struct GNUNET_PeerIdentity *sender, const struct GNUNET_MessageHeader *msg)
Function called when the transport service has received a backchannel message for this communicator (...
struct GNUNET_TRANSPORT_QueueHandle * prev
Kept in a DLL.
#define GNUNET_MESSAGE_TYPE_TRANSPORT_COMMUNICATOR_BACKCHANNEL_INCOMING
Transport signalling incoming backchannel message to a communicator.
uint16_t size
The length of the struct (in bytes, including the length field itself), in big-endian format...
static int check_backchannel_incoming(void *cls, const struct GNUNET_TRANSPORT_CommunicatorBackchannelIncoming *bi)
Transport service gives us backchannel message.
#define GNUNET_strdup(a)
Wrapper around GNUNET_xstrdup_.
GNUNET_NetworkType
Types of networks (with separate quotas) we support.
Definition: gnunet_nt_lib.h:35
#define GNUNET_break(cond)
Use this for internal assertion violations that are not fatal (can be handled) but should not occur...
Information we track per packet to enable flow control.
struct GNUNET_TRANSPORT_AddressIdentifier * ai_tail
Tail of DLL of addresses this communicator offers to the transport service.
#define GNUNET_MQ_check_boxed_message(m)
Insert code for a "check_" function that verifies that a given variable-length message received over ...
struct GNUNET_TRANSPORT_CommunicatorHandle * ch
Handle this queue belongs to.
struct GNUNET_TRANSPORT_QueueHandle * queue_head
DLL of queues we offer.
struct GNUNET_TRANSPORT_CommunicatorHandle * ch
Transport handle where the address was added.
Opaque handle to the transport service for communicators.
#define _(String)
GNU gettext support macro.
Definition: platform.h:208
void GNUNET_TRANSPORT_communicator_disconnect(struct GNUNET_TRANSPORT_CommunicatorHandle *ch)
Disconnect from the transport service.
struct AckPending * prev
Kept in a DLL.
enum GNUNET_TRANSPORT_ConnectionStatus cs
Communication status of the queue.
void * cb_cls
Closure for cb.
static void error_handler(void *cls, enum GNUNET_MQ_Error error)
Function called on MQ errors.
#define GNUNET_MESSAGE_TYPE_TRANSPORT_INCOMING_MSG
inform transport about an incoming message
void GNUNET_TRANSPORT_communicator_mq_del(struct GNUNET_TRANSPORT_QueueHandle *qh)
Notify transport service that an MQ became unavailable due to a disconnect or timeout.
static int check_send_msg(void *cls, const struct GNUNET_TRANSPORT_SendMessageTo *smt)
Transport service wants us to send a message.
int(* GNUNET_TRANSPORT_CommunicatorMqInit)(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...
#define GNUNET_MQ_msg_extra(mvar, esize, type)
Allocate an envelope, with extra space allocated after the space needed by the message struct...
Definition: gnunet_mq_lib.h:52
struct GNUNET_TRANSPORT_QueueHandle * queue_tail
DLL of queues we offer.
uint64_t fc_gen
Flow-control identifier generator.
#define GNUNET_MQ_check_zero_termination(m)
Insert code for a "check_" function that verifies that a given variable-length message received over ...
void GNUNET_MQ_notify_sent(struct GNUNET_MQ_Envelope *ev, GNUNET_SCHEDULER_TaskCallback cb, void *cb_cls)
Call a callback once the envelope has been sent, that is, sending it can not be canceled anymore...
Definition: mq.c:774
#define GNUNET_MQ_hd_var_size(name, code, str, ctx)
#define GNUNET_MESSAGE_TYPE_TRANSPORT_INCOMING_MSG_ACK
transport acknowledges processing an incoming message
unsigned int GNUNET_MQ_get_length(struct GNUNET_MQ_Handle *mq)
Obtain the current length of the message queue.
Definition: mq.c:335
static void send_del_address(struct GNUNET_TRANSPORT_AddressIdentifier *ai)
Send message to the transport service about address ai being no longer available. ...
#define GNUNET_MESSAGE_TYPE_TRANSPORT_QUEUE_SETUP
inform transport that a queue was setup to talk to some peer
const char * addr_prefix
Address prefix to use.
#define GNUNET_MESSAGE_TYPE_TRANSPORT_COMMUNICATOR_BACKCHANNEL
Tell transport that it should assist with exchanging a message between communicators.
struct GNUNET_TIME_Relative expiration
When does the address expire? (Expected lifetime of the address.)
void(* GNUNET_TRANSPORT_MessageCompletedCallback)(void *cls, int success)
Function called to notify communicator that we have received and processed the message.
static void disconnect(struct GNUNET_TRANSPORT_CommunicatorHandle *ch)
Disconnect from the transport service.
uint16_t status
See PRISM_STATUS_*-constants.
struct AckPending * ap_tail
DLL of messages awaiting transmission confirmation (ack).
static void send_del_queue(struct GNUNET_TRANSPORT_QueueHandle *qh)
Send message to the transport service about queue qh being no longer available.
struct GNUNET_TRANSPORT_CommunicatorHandle * GNUNET_TRANSPORT_communicator_connect(const struct GNUNET_CONFIGURATION_Handle *cfg, const char *config_section, 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.
struct FlowControl * fc_head
DLL of messages awaiting flow control confirmation (ack).
#define GNUNET_MESSAGE_TYPE_TRANSPORT_SEND_MSG_ACK
communicator tells transports that message was sent
Information we track per message to tell the transport about success or failures. ...
struct GNUNET_PeerIdentity sender
Which peer is this about?
Message handler for a specific message type.
static struct GNUNET_NAT_AUTO_Test * nt
Handle to a NAT test operation.
static struct GNUNET_CONFIGURATION_Handle * cfg
Our configuration.
Definition: gnunet-arm.c:104
#define GNUNET_MESSAGE_TYPE_TRANSPORT_DEL_ADDRESS
inform transport to delete an address of this peer
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...
struct GNUNET_TESTBED_Peer * peer
The peer associated with this model.
#define GNUNET_SYSERR
Definition: gnunet_common.h:79
static struct GNUNET_TRANSPORT_AddressIdentifier * ai
Handle to the operation that publishes our address.
struct GNUNET_TIME_RelativeNBO GNUNET_TIME_relative_hton(struct GNUNET_TIME_Relative a)
Convert relative time to network byte order.
Definition: time.c:622
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...
struct FlowControl * prev
Kept in a DLL.
struct GNUNET_MQ_Envelope * env
Definition: 005.c:1
static void send_msg(void *cls)
Function called to notify a client about the socket begin ready to queue more data.
struct GNUNET_MQ_Handle * mq
Queue to talk to the transport service.
int GNUNET_TRANSPORT_communicator_receive(struct GNUNET_TRANSPORT_CommunicatorHandle *ch, 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.
struct GNUNET_TRANSPORT_AddressIdentifier * ai_head
Head of DLL of addresses this communicator offers to the transport service.
struct GNUNET_TRANSPORT_AddressIdentifier * prev
Kept in a DLL.
static void reconnect(struct GNUNET_TRANSPORT_CommunicatorHandle *ch)
(re)connect our communicator to the transport service
Handle to a message queue.
Definition: mq.c:85
struct GNUNET_PeerIdentity peer
Which peer we can communciate with.
The identity of the host (wraps the signing key of the peer).
enum GNUNET_NetworkType nt
Network type for the address.
configuration data
Definition: configuration.c:85
#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...
#define GNUNET_MESSAGE_TYPE_TRANSPORT_NEW_COMMUNICATOR
Message sent to indicate to the transport which address prefix is supported by a communicator.
void GNUNET_TRANSPORT_communicator_notify(struct GNUNET_TRANSPORT_CommunicatorHandle *ch, const struct GNUNET_PeerIdentity *pid, const char *comm, const struct GNUNET_MessageHeader *header)
The communicator asks the transport service to route a message via a different path to another commun...
#define GNUNET_MESSAGE_TYPE_TRANSPORT_QUEUE_CREATE_FAIL
Response from communicator: address bogus, will not try to create queue.
static void send_add_address(struct GNUNET_TRANSPORT_AddressIdentifier *ai)
Send message to the transport service about address ai being now available.
#define GNUNET_MESSAGE_TYPE_TRANSPORT_QUEUE_TEARDOWN
inform transport that a queue was torn down
struct GNUNET_MQ_Handle * mq
Definition: 003.c:5
#define GNUNET_log(kind,...)
static void send_ack(struct GNUNET_TRANSPORT_CommunicatorHandle *ch, int status, const struct GNUNET_PeerIdentity *receiver, uint64_t mid)
Notify transport service about status of a message with mid sent to receiver.
struct GNUNET_MQ_Handle * mq
The queue itself.
static int check_create_queue(void *cls, const struct GNUNET_TRANSPORT_CreateQueue *cq)
Transport service wants us to create a queue.
#define GNUNET_MESSAGE_TYPE_TRANSPORT_ADD_ADDRESS
inform transport to add an address of this peer
uint32_t queue_gen
Queue identifier generator.
struct GNUNET_TRANSPORT_CommunicatorHandle * ch
Communicator this entry belongs to.
Header for all communications.
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
uint64_t mid
More-or-less unique ID for the message.
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
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, enum GNUNET_NetworkType nt, enum GNUNET_TRANSPORT_ConnectionStatus cs, struct GNUNET_MQ_Handle *mq)
Notify transport service that an MQ became available due to an "inbound" connection or because the co...
GNUNET_TRANSPORT_ConnectionStatus
Possible states of a connection.
uint32_t aid
Internal UUID for the address used in communication with the transport service.
static struct GNUNET_PeerIdentity pid
Identity of the peer we transmit to / connect to.
const struct GNUNET_CONFIGURATION_Handle * cfg
Our configuration.
struct FlowControl * fc_tail
DLL of messages awaiting flow control confirmation (ack).
GNUNET_TRANSPORT_CommunicatorMqInit mq_init
Function to call when the transport service wants us to initiate a communication channel with another...
struct AckPending * next
Kept in a DLL.
enum GNUNET_TRANSPORT_CommunicatorCharacteristics cc
Characteristics of the communicator.
struct FlowControl * next
Kept in a DLL.
static char * address
GNS address for this phone.
uint32_t mtu
Maximum transmission unit for the queue.
Handle returned to identify the internal data structure the transport API has created to manage a mes...
#define GNUNET_MQ_handler_end()
End-marker for the handlers array.
static void handle_incoming_ack(void *cls, const struct GNUNET_TRANSPORT_IncomingMessageAck *incoming_ack)
Transport service acknowledged a message we gave it (with flow control enabled).
struct AckPending * ap_head
DLL of messages awaiting transmission confirmation (ack).
Internal representation of an address a communicator is currently providing for the transport service...
#define GNUNET_free(ptr)
Wrapper around free.
Time for relative time used by GNUnet, in microseconds.
Bandwidth allocation API for the transport service.
static void handle_create_queue(void *cls, const struct GNUNET_TRANSPORT_CreateQueue *cq)
Transport service wants us to create a queue.