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- /*
- * This file is part of GNUnet
- * Copyright (C) 2013 GNUnet e.V.
- *
- * GNUnet is free software: you can redistribute it and/or modify it
- * under the terms of the GNU Affero General Public License as published
- * by the Free Software Foundation, either version 3 of the License,
- * or (at your option) any later version.
- *
- * GNUnet is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Affero General Public License for more details.
- *
- * You should have received a copy of the GNU Affero General Public License
- * along with this program. If not, see <http://www.gnu.org/licenses/>.
-
- SPDX-License-Identifier: AGPL3.0-or-later
- */
-
- /**
- * @author Gabor X Toth
- *
- * @file
- * Social service; implements social interactions using the PSYC service.
- */
-
- #include <inttypes.h>
- #include <string.h>
-
- #include <gnunet/platform.h>
- #include <gnunet/gnunet_util_lib.h>
- #include "gnunet_psyc_service.h"
- #include "gnunet_psyc_util_lib.h"
- #include "gnunet_social_service.h"
- #include "social.h"
-
- #define LOG(kind,...) GNUNET_log_from (kind, "social-api",__VA_ARGS__)
-
- /**
- * Handle for an ego.
- */
- struct GNUNET_SOCIAL_Ego
- {
- struct GNUNET_CRYPTO_EcdsaPublicKey pub_key;
- struct GNUNET_HashCode pub_key_hash;
- char *name;
- };
-
-
- /**
- * Handle for a pseudonym of another user in the network.
- */
- struct GNUNET_SOCIAL_Nym
- {
- struct GNUNET_CRYPTO_EcdsaPublicKey pub_key;
- struct GNUNET_HashCode pub_key_hash;
- };
-
-
- /**
- * Handle for an application.
- */
- struct GNUNET_SOCIAL_App
- {
- /**
- * Configuration to use.
- */
- const struct GNUNET_CONFIGURATION_Handle *cfg;
-
- /**
- * Client connection to the service.
- */
- struct GNUNET_MQ_Handle *mq;
-
- /**
- * Message to send on connect.
- */
- struct GNUNET_MQ_Envelope *connect_env;
-
- /**
- * Time to wait until we try to reconnect on failure.
- */
- struct GNUNET_TIME_Relative reconnect_delay;
-
- /**
- * Task for reconnecting when the listener fails.
- */
- struct GNUNET_SCHEDULER_Task *reconnect_task;
-
- /**
- * Async operations.
- */
- struct GNUNET_OP_Handle *op;
-
- /**
- * Function called after disconnected from the service.
- */
- GNUNET_ContinuationCallback disconnect_cb;
-
- /**
- * Closure for @a disconnect_cb.
- */
- void *disconnect_cls;
-
- /**
- * Application ID.
- */
- char *id;
-
- /**
- * Hash map of all egos.
- * pub_key_hash -> struct GNUNET_SOCIAL_Ego *
- */
- struct GNUNET_CONTAINER_MultiHashMap *egos;
-
- GNUNET_SOCIAL_AppEgoCallback ego_cb;
- GNUNET_SOCIAL_AppHostPlaceCallback host_cb;
- GNUNET_SOCIAL_AppGuestPlaceCallback guest_cb;
- GNUNET_SOCIAL_AppConnectedCallback connected_cb;
- void *cb_cls;
- };
-
-
- struct GNUNET_SOCIAL_HostConnection
- {
- struct GNUNET_SOCIAL_App *app;
-
- struct AppPlaceMessage plc_msg;
- };
-
-
- struct GNUNET_SOCIAL_GuestConnection
- {
- struct GNUNET_SOCIAL_App *app;
-
- struct AppPlaceMessage plc_msg;
- };
-
-
- /**
- * Handle for a place where social interactions happen.
- */
- struct GNUNET_SOCIAL_Place
- {
- /**
- * Configuration to use.
- */
- const struct GNUNET_CONFIGURATION_Handle *cfg;
-
- /**
- * Client connection to the service.
- */
- struct GNUNET_MQ_Handle *mq;
-
- /**
- * Message to send on connect.
- */
- struct GNUNET_MQ_Envelope *connect_env;
-
- /**
- * Time to wait until we try to reconnect on failure.
- */
- struct GNUNET_TIME_Relative reconnect_delay;
-
- /**
- * Task for reconnecting when the listener fails.
- */
- struct GNUNET_SCHEDULER_Task *reconnect_task;
-
- /**
- * Async operations.
- */
- struct GNUNET_OP_Handle *op;
-
- /**
- * Transmission handle.
- */
- struct GNUNET_PSYC_TransmitHandle *tmit;
-
- /**
- * Slicer for processing incoming messages.
- */
- struct GNUNET_PSYC_Slicer *slicer;
-
- // FIXME: do we need is_disconnecing like on the psyc and multicast APIs?
- /**
- * Function called after disconnected from the service.
- */
- GNUNET_ContinuationCallback disconnect_cb;
-
- /**
- * Closure for @a disconnect_cb.
- */
- void *disconnect_cls;
-
- /**
- * Public key of the place.
- */
- struct GNUNET_CRYPTO_EddsaPublicKey pub_key;
-
- /**
- * Public key of the ego.
- */
- struct GNUNET_CRYPTO_EcdsaPublicKey ego_pub_key;
-
- /**
- * Does this place belong to a host (#GNUNET_YES) or guest (#GNUNET_NO)?
- */
- uint8_t is_host;
- };
-
-
- /**
- * Host handle for a place that we entered.
- */
- struct GNUNET_SOCIAL_Host
- {
- struct GNUNET_SOCIAL_Place plc;
-
- /**
- * Slicer for processing incoming messages from guests.
- */
- struct GNUNET_PSYC_Slicer *slicer;
-
- GNUNET_SOCIAL_HostEnterCallback enter_cb;
-
- GNUNET_SOCIAL_AnswerDoorCallback answer_door_cb;
-
- GNUNET_SOCIAL_FarewellCallback farewell_cb;
-
- /**
- * Closure for callbacks.
- */
- void *cb_cls;
-
- struct GNUNET_SOCIAL_Nym *notice_place_leave_nym;
- struct GNUNET_PSYC_Environment *notice_place_leave_env;
- };
-
-
- /**
- * Guest handle for place that we entered.
- */
- struct GNUNET_SOCIAL_Guest
- {
- struct GNUNET_SOCIAL_Place plc;
-
- GNUNET_SOCIAL_GuestEnterCallback enter_cb;
-
- GNUNET_SOCIAL_EntryDecisionCallback entry_dcsn_cb;
-
- /**
- * Closure for callbacks.
- */
- void *cb_cls;
- };
-
-
- /**
- * Hash map of all nyms.
- * pub_key_hash -> struct GNUNET_SOCIAL_Nym *
- */
- struct GNUNET_CONTAINER_MultiHashMap *nyms;
-
-
- /**
- * Handle for an announcement request.
- */
- struct GNUNET_SOCIAL_Announcement
- {
-
- };
-
-
- /**
- * A talk request.
- */
- struct GNUNET_SOCIAL_TalkRequest
- {
-
- };
-
-
- /**
- * A history lesson.
- */
- struct GNUNET_SOCIAL_HistoryRequest
- {
- /**
- * Place.
- */
- struct GNUNET_SOCIAL_Place *plc;
-
- /**
- * Operation ID.
- */
- uint64_t op_id;
-
- /**
- * Slicer for processing incoming messages.
- */
- struct GNUNET_PSYC_Slicer *slicer;
-
- /**
- * Function to call when the operation finished.
- */
- GNUNET_ResultCallback result_cb;
-
- /**
- * Closure for @a result_cb.
- */
- void *cls;
- };
-
-
- struct GNUNET_SOCIAL_LookHandle
- {
- /**
- * Place.
- */
- struct GNUNET_SOCIAL_Place *plc;
-
- /**
- * Operation ID.
- */
- uint64_t op_id;
-
- /**
- * State variable result callback.
- */
- GNUNET_PSYC_StateVarCallback var_cb;
-
- /**
- * Function to call when the operation finished.
- */
- GNUNET_ResultCallback result_cb;
-
- /**
- * Name of current modifier being received.
- */
- char *mod_name;
-
- /**
- * Size of current modifier value being received.
- */
- size_t mod_value_size;
-
- /**
- * Remaining size of current modifier value still to be received.
- */
- size_t mod_value_remaining;
-
- /**
- * Closure for @a result_cb.
- */
- void *cls;
- };
-
-
- struct ZoneAddPlaceHandle
- {
- GNUNET_ResultCallback result_cb;
- void *result_cls;
- };
-
-
- struct ZoneAddNymHandle
- {
- GNUNET_ResultCallback result_cb;
- void *result_cls;
- };
-
-
- /*** CLEANUP / DISCONNECT ***/
-
-
- static void
- host_cleanup (struct GNUNET_SOCIAL_Host *hst)
- {
- if (NULL != hst->slicer)
- {
- GNUNET_PSYC_slicer_destroy (hst->slicer);
- hst->slicer = NULL;
- }
- GNUNET_free (hst);
- }
-
-
- static void
- guest_cleanup (struct GNUNET_SOCIAL_Guest *gst)
- {
- GNUNET_free (gst);
- }
-
-
- static void
- place_cleanup (struct GNUNET_SOCIAL_Place *plc)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "cleaning up place %p\n",
- plc);
- if (NULL != plc->tmit)
- {
- GNUNET_PSYC_transmit_destroy (plc->tmit);
- plc->tmit = NULL;
- }
- if (NULL != plc->connect_env)
- {
- GNUNET_MQ_discard (plc->connect_env);
- plc->connect_env = NULL;
- }
- if (NULL != plc->mq)
- {
- GNUNET_MQ_destroy (plc->mq);
- plc->mq = NULL;
- }
- if (NULL != plc->disconnect_cb)
- {
- plc->disconnect_cb (plc->disconnect_cls);
- plc->disconnect_cb = NULL;
- }
-
- (GNUNET_YES == plc->is_host)
- ? host_cleanup ((struct GNUNET_SOCIAL_Host *) plc)
- : guest_cleanup ((struct GNUNET_SOCIAL_Guest *) plc);
- }
-
-
- static void
- place_disconnect (struct GNUNET_SOCIAL_Place *plc)
- {
- place_cleanup (plc);
- }
-
-
- /*** NYM ***/
-
- static struct GNUNET_SOCIAL_Nym *
- nym_get_or_create (const struct GNUNET_CRYPTO_EcdsaPublicKey *pub_key)
- {
- struct GNUNET_SOCIAL_Nym *nym = NULL;
- struct GNUNET_HashCode pub_key_hash;
-
- if (NULL == pub_key)
- return NULL;
-
- GNUNET_CRYPTO_hash (pub_key, sizeof (*pub_key), &pub_key_hash);
-
- if (NULL == nyms)
- nyms = GNUNET_CONTAINER_multihashmap_create (1, GNUNET_YES);
- else
- nym = GNUNET_CONTAINER_multihashmap_get (nyms, &pub_key_hash);
-
- if (NULL == nym)
- {
- nym = GNUNET_new (struct GNUNET_SOCIAL_Nym);
- nym->pub_key = *pub_key;
- nym->pub_key_hash = pub_key_hash;
- GNUNET_CONTAINER_multihashmap_put (nyms, &nym->pub_key_hash, nym,
- GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST);
- }
- return nym;
- }
-
-
- static void
- nym_destroy (struct GNUNET_SOCIAL_Nym *nym)
- {
- GNUNET_CONTAINER_multihashmap_remove (nyms, &nym->pub_key_hash, nym);
- GNUNET_free (nym);
- }
-
-
- /*** MESSAGE HANDLERS ***/
-
- /** _notice_place_leave from guests */
-
- static void
- host_recv_notice_place_leave_method (void *cls,
- const struct GNUNET_PSYC_MessageHeader *msg,
- const struct GNUNET_PSYC_MessageMethod *meth,
- uint64_t message_id,
- const char *method_name)
- {
- struct GNUNET_SOCIAL_Host *hst = cls;
-
- if (0 == memcmp (&(struct GNUNET_CRYPTO_EcdsaPublicKey) {},
- &msg->slave_pub_key, sizeof (msg->slave_pub_key)))
- return;
-
- struct GNUNET_SOCIAL_Nym *nym = nym_get_or_create (&msg->slave_pub_key);
-
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Host received method for message ID %" PRIu64 " from nym %s: %s\n",
- message_id, GNUNET_h2s (&nym->pub_key_hash), method_name);
-
- hst->notice_place_leave_nym = (struct GNUNET_SOCIAL_Nym *) nym;
- hst->notice_place_leave_env = GNUNET_PSYC_env_create ();
-
- char *str = GNUNET_CRYPTO_ecdsa_public_key_to_string (&hst->notice_place_leave_nym->pub_key);
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "_notice_place_leave: got method from nym %s (%s).\n",
- GNUNET_h2s (&hst->notice_place_leave_nym->pub_key_hash), str);
- GNUNET_free (str);
- }
-
-
- static void
- host_recv_notice_place_leave_modifier (void *cls,
- const struct GNUNET_PSYC_MessageHeader *msg,
- const struct GNUNET_MessageHeader *pmsg,
- uint64_t message_id,
- enum GNUNET_PSYC_Operator oper,
- const char *name,
- const void *value,
- uint16_t value_size,
- uint16_t full_value_size)
- {
- struct GNUNET_SOCIAL_Host *hst = cls;
- if (NULL == hst->notice_place_leave_env)
- return;
-
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Host received modifier for _notice_place_leave message with ID %" PRIu64 ":\n"
- "%c%s: %.*s\n",
- message_id, oper, name, value_size, (const char *) value);
-
- /* skip _nym, it's added later in eom() */
- if (0 == memcmp (name, "_nym", sizeof ("_nym"))
- || 0 == memcmp (name, "_nym_", sizeof ("_nym_") - 1))
- return;
-
- GNUNET_PSYC_env_add (hst->notice_place_leave_env,
- GNUNET_PSYC_OP_SET, name, value, value_size);
- }
-
-
- static void
- host_recv_notice_place_leave_eom (void *cls,
- const struct GNUNET_PSYC_MessageHeader *msg,
- const struct GNUNET_MessageHeader *pmsg,
- uint64_t message_id,
- uint8_t is_cancelled)
- {
- struct GNUNET_SOCIAL_Host *hst = cls;
- if (NULL == hst->notice_place_leave_env)
- return;
-
- char *str = GNUNET_CRYPTO_ecdsa_public_key_to_string (&hst->notice_place_leave_nym->pub_key);
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "_notice_place_leave: got EOM from nym %s (%s).\n",
- GNUNET_h2s (&hst->notice_place_leave_nym->pub_key_hash), str);
- GNUNET_free (str);
-
- if (GNUNET_YES != is_cancelled)
- {
- if (NULL != hst->farewell_cb)
- hst->farewell_cb (hst->cb_cls, hst->notice_place_leave_nym,
- hst->notice_place_leave_env);
- /* announce leaving guest to place */
- GNUNET_PSYC_env_add (hst->notice_place_leave_env, GNUNET_PSYC_OP_SET,
- "_nym", hst->notice_place_leave_nym,
- sizeof (*hst->notice_place_leave_nym));
- GNUNET_SOCIAL_host_announce (hst, "_notice_place_leave",
- hst->notice_place_leave_env,
- NULL, NULL, GNUNET_SOCIAL_ANNOUNCE_NONE);
- nym_destroy (hst->notice_place_leave_nym);
- }
- GNUNET_PSYC_env_destroy (hst->notice_place_leave_env);
- hst->notice_place_leave_env = NULL;
- }
-
-
- /*** PLACE ***/
-
-
- static int
- check_place_result (void *cls,
- const struct GNUNET_OperationResultMessage *res)
- {
- uint16_t size = ntohs (res->header.size);
- if (size < sizeof (*res))
- { /* Error, message too small. */
- GNUNET_break (0);
- return GNUNET_SYSERR;
- }
- return GNUNET_OK;
- }
-
-
- static void
- handle_place_result (void *cls,
- const struct GNUNET_OperationResultMessage *res)
- {
- struct GNUNET_SOCIAL_Place *plc = cls;
-
- uint16_t size = ntohs (res->header.size);
- uint16_t data_size = size - sizeof (*res);
- const char *data = (0 < data_size) ? (const char *) &res[1] : NULL;
-
- GNUNET_OP_result (plc->op, GNUNET_ntohll (res->op_id),
- GNUNET_ntohll (res->result_code),
- data, data_size, NULL);
- }
-
-
- static int
- check_app_result (void *cls,
- const struct GNUNET_OperationResultMessage *res)
- {
- uint16_t size = ntohs (res->header.size);
- if (size < sizeof (*res))
- { /* Error, message too small. */
- GNUNET_break (0);
- return GNUNET_SYSERR;
- }
- return GNUNET_OK;
- }
-
-
- static void
- handle_app_result (void *cls,
- const struct GNUNET_OperationResultMessage *res)
- {
- struct GNUNET_SOCIAL_App *app = cls;
-
- uint16_t size = ntohs (res->header.size);
- uint16_t data_size = size - sizeof (*res);
- const char *data = (0 < data_size) ? (const char *) &res[1] : NULL;
-
- GNUNET_OP_result (app->op, GNUNET_ntohll (res->op_id),
- GNUNET_ntohll (res->result_code),
- data, data_size, NULL);
- }
-
-
- static void
- op_recv_history_result (void *cls, int64_t result,
- const void *err_msg, uint16_t err_msg_size)
- {
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "Received history replay result: %" PRId64 ".\n", result);
-
- struct GNUNET_SOCIAL_HistoryRequest *hist = cls;
-
- if (NULL != hist->result_cb)
- hist->result_cb (hist->cls, result, err_msg, err_msg_size);
-
- GNUNET_free (hist);
- }
-
-
- static void
- op_recv_state_result (void *cls, int64_t result,
- const void *err_msg, uint16_t err_msg_size)
- {
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "Received state request result: %" PRId64 ".\n", result);
-
- struct GNUNET_SOCIAL_LookHandle *look = cls;
-
- if (NULL != look->result_cb)
- look->result_cb (look->cls, result, err_msg, err_msg_size);
-
- GNUNET_free (look);
- }
-
-
- static int
- check_place_history_result (void *cls,
- const struct GNUNET_OperationResultMessage *res)
- {
- struct GNUNET_PSYC_MessageHeader *
- pmsg = (struct GNUNET_PSYC_MessageHeader *) GNUNET_MQ_extract_nested_mh (res);
- uint16_t size = ntohs (res->header.size);
-
- if (NULL == pmsg || size < sizeof (*res) + sizeof (*pmsg))
- { /* Error, message too small. */
- GNUNET_break (0);
- return GNUNET_SYSERR;
- }
- return GNUNET_OK;
- }
-
-
- static void
- handle_place_history_result (void *cls,
- const struct GNUNET_OperationResultMessage *res)
- {
- struct GNUNET_SOCIAL_Place *plc = cls;
- struct GNUNET_PSYC_MessageHeader *
- pmsg = (struct GNUNET_PSYC_MessageHeader *) GNUNET_MQ_extract_nested_mh (res);
-
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "%p Received historic fragment for message #%" PRIu64 ".\n",
- plc, GNUNET_ntohll (pmsg->message_id));
-
- GNUNET_ResultCallback result_cb = NULL;
- struct GNUNET_SOCIAL_HistoryRequest *hist = NULL;
-
- if (GNUNET_YES != GNUNET_OP_get (plc->op,
- GNUNET_ntohll (res->op_id),
- &result_cb, (void *) &hist, NULL))
- { /* Operation not found. */
- LOG (GNUNET_ERROR_TYPE_WARNING,
- "%p Replay operation not found for historic fragment of message #%"
- PRIu64 ".\n",
- plc, GNUNET_ntohll (pmsg->message_id));
- return;
- }
-
- GNUNET_PSYC_slicer_message (hist->slicer,
- (const struct GNUNET_PSYC_MessageHeader *) pmsg);
- }
-
-
- static int
- check_place_state_result (void *cls,
- const struct GNUNET_OperationResultMessage *res)
- {
- const struct GNUNET_MessageHeader *mod = GNUNET_MQ_extract_nested_mh (res);
- if (NULL == mod)
- {
- GNUNET_break_op (0);
- LOG (GNUNET_ERROR_TYPE_WARNING,
- "Invalid modifier in state result\n");
- return GNUNET_SYSERR;
- }
-
- uint16_t size = ntohs (res->header.size);
- uint16_t mod_size = ntohs (mod->size);
- if (size - sizeof (*res) != mod_size)
- {
- GNUNET_break_op (0);
- LOG (GNUNET_ERROR_TYPE_WARNING,
- "Invalid modifier size in state result: %u - %u != %u\n",
- ntohs (res->header.size), sizeof (*res), mod_size);
- return GNUNET_SYSERR;
- }
- return GNUNET_OK;
- }
-
-
- static void
- handle_place_state_result (void *cls,
- const struct GNUNET_OperationResultMessage *res)
- {
- struct GNUNET_SOCIAL_Place *plc = cls;
-
- GNUNET_ResultCallback result_cb = NULL;
- struct GNUNET_SOCIAL_LookHandle *look = NULL;
-
- if (GNUNET_YES != GNUNET_OP_get (plc->op,
- GNUNET_ntohll (res->op_id),
- &result_cb, (void *) &look, NULL))
- { /* Operation not found. */
- return;
- }
-
- const struct GNUNET_MessageHeader *mod = GNUNET_MQ_extract_nested_mh (res);
- uint16_t mod_size = ntohs (mod->size);
-
- switch (ntohs (mod->type))
- {
- case GNUNET_MESSAGE_TYPE_PSYC_MESSAGE_MODIFIER:
- {
- const struct GNUNET_PSYC_MessageModifier *
- pmod = (const struct GNUNET_PSYC_MessageModifier *) mod;
-
- const char *name = (const char *) &pmod[1];
- uint16_t name_size = ntohs (pmod->name_size);
- if (0 == name_size
- || mod_size - sizeof (*pmod) < name_size
- || '\0' != name[name_size - 1])
- {
- GNUNET_break_op (0);
- LOG (GNUNET_ERROR_TYPE_WARNING,
- "Invalid modifier name in state result\n");
- return;
- }
- look->mod_value_size = ntohs (pmod->value_size);
- look->var_cb (look->cls, mod, name, name + name_size,
- mod_size - sizeof (*mod) - name_size,
- look->mod_value_size);
- if (look->mod_value_size > mod_size - sizeof (*mod) - name_size)
- {
- look->mod_value_remaining = look->mod_value_size;
- look->mod_name = GNUNET_malloc (name_size);
- GNUNET_memcpy (look->mod_name, name, name_size);
- }
- break;
- }
-
- case GNUNET_MESSAGE_TYPE_PSYC_MESSAGE_MOD_CONT:
- look->var_cb (look->cls, mod, look->mod_name, (const char *) &mod[1],
- mod_size - sizeof (*mod), look->mod_value_size);
- look->mod_value_remaining -= mod_size - sizeof (*mod);
- if (0 == look->mod_value_remaining)
- {
- GNUNET_free (look->mod_name);
- }
- break;
- }
- }
-
-
- static void
- handle_place_message_ack (void *cls,
- const struct GNUNET_MessageHeader *msg)
- {
- struct GNUNET_SOCIAL_Place *plc = cls;
-
- GNUNET_PSYC_transmit_got_ack (plc->tmit);
- }
-
-
- static int
- check_place_message (void *cls,
- const struct GNUNET_PSYC_MessageHeader *pmsg)
- {
- return GNUNET_OK;
- }
-
-
- static void
- handle_place_message (void *cls,
- const struct GNUNET_PSYC_MessageHeader *pmsg)
- {
- struct GNUNET_SOCIAL_Place *plc = cls;
-
- GNUNET_PSYC_slicer_message (plc->slicer, pmsg);
- }
-
-
- static int
- check_host_message (void *cls,
- const struct GNUNET_PSYC_MessageHeader *pmsg)
- {
- return GNUNET_OK;
- }
-
-
- static void
- handle_host_message (void *cls,
- const struct GNUNET_PSYC_MessageHeader *pmsg)
- {
- struct GNUNET_SOCIAL_Host *hst = cls;
-
- GNUNET_PSYC_slicer_message (hst->slicer, pmsg);
- GNUNET_PSYC_slicer_message (hst->plc.slicer, pmsg);
- }
-
-
- static void
- handle_host_enter_ack (void *cls,
- const struct HostEnterAck *hack)
- {
- struct GNUNET_SOCIAL_Host *hst = cls;
-
- hst->plc.pub_key = hack->place_pub_key;
-
- int32_t result = ntohl (hack->result_code);
- if (NULL != hst->enter_cb)
- hst->enter_cb (hst->cb_cls, result, &hack->place_pub_key,
- GNUNET_ntohll (hack->max_message_id));
- }
-
-
- static int
- check_host_enter_request (void *cls,
- const struct GNUNET_PSYC_JoinRequestMessage *req)
- {
- return GNUNET_OK;
- }
-
-
- static void
- handle_host_enter_request (void *cls,
- const struct GNUNET_PSYC_JoinRequestMessage *req)
- {
- struct GNUNET_SOCIAL_Host *hst = cls;
-
- if (NULL == hst->answer_door_cb)
- return;
-
- const char *method_name = NULL;
- struct GNUNET_PSYC_Environment *env = NULL;
- struct GNUNET_PSYC_MessageHeader *entry_pmsg = NULL;
- const void *data = NULL;
- uint16_t data_size = 0;
- char *str;
- const struct GNUNET_PSYC_Message *join_msg = NULL;
-
- do
- {
- if (sizeof (*req) + sizeof (*join_msg) <= ntohs (req->header.size))
- {
- join_msg = (struct GNUNET_PSYC_Message *) GNUNET_MQ_extract_nested_mh (req);
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "Received join_msg of type %u and size %u.\n",
- ntohs (join_msg->header.type), ntohs (join_msg->header.size));
-
- env = GNUNET_PSYC_env_create ();
- entry_pmsg = GNUNET_PSYC_message_header_create_from_psyc (join_msg);
- if (GNUNET_OK != GNUNET_PSYC_message_parse (entry_pmsg, &method_name, env,
- &data, &data_size))
- {
- GNUNET_break_op (0);
- str = GNUNET_CRYPTO_ecdsa_public_key_to_string (&req->slave_pub_key);
- LOG (GNUNET_ERROR_TYPE_WARNING,
- "Ignoring invalid entry request from nym %s.\n",
- str);
- GNUNET_free (str);
- break;
- }
- }
-
- struct GNUNET_SOCIAL_Nym *nym = nym_get_or_create (&req->slave_pub_key);
- hst->answer_door_cb (hst->cb_cls, nym, method_name, env,
- data, data_size);
- } while (0);
-
- if (NULL != env)
- GNUNET_PSYC_env_destroy (env);
- if (NULL != entry_pmsg)
- GNUNET_free (entry_pmsg);
- }
-
-
- static void
- handle_guest_enter_ack (void *cls,
- const struct GNUNET_PSYC_CountersResultMessage *cres)
- {
- struct GNUNET_SOCIAL_Guest *gst = cls;
-
- int32_t result = ntohl (cres->result_code);
- if (NULL != gst->enter_cb)
- gst->enter_cb (gst->cb_cls, result, &gst->plc.pub_key,
- GNUNET_ntohll (cres->max_message_id));
- }
-
-
- static int
- check_guest_enter_decision (void *cls,
- const struct GNUNET_PSYC_JoinDecisionMessage *dcsn)
- {
- return GNUNET_OK;
- }
-
-
- static void
- handle_guest_enter_decision (void *cls,
- const struct GNUNET_PSYC_JoinDecisionMessage *dcsn)
- {
- struct GNUNET_SOCIAL_Guest *gst = cls;
-
- struct GNUNET_PSYC_Message *pmsg = NULL;
- if (ntohs (dcsn->header.size) > sizeof (*dcsn))
- pmsg = (struct GNUNET_PSYC_Message *) GNUNET_MQ_extract_nested_mh (dcsn);
-
- if (NULL != gst->entry_dcsn_cb)
- gst->entry_dcsn_cb (gst->cb_cls, ntohl (dcsn->is_admitted), pmsg);
- }
-
-
- static int
- check_app_ego (void *cls,
- const struct AppEgoMessage *emsg)
- {
- return GNUNET_OK;
- }
-
-
- static void
- handle_app_ego (void *cls,
- const struct AppEgoMessage *emsg)
- {
- struct GNUNET_SOCIAL_App *app = cls;
-
- uint16_t name_size = ntohs (emsg->header.size) - sizeof (*emsg);
-
- struct GNUNET_HashCode ego_pub_hash;
- GNUNET_CRYPTO_hash (&emsg->ego_pub_key, sizeof (emsg->ego_pub_key),
- &ego_pub_hash);
-
- struct GNUNET_SOCIAL_Ego *
- ego = GNUNET_CONTAINER_multihashmap_get (app->egos, &ego_pub_hash);
- if (NULL == ego)
- {
- ego = GNUNET_malloc (sizeof (*ego));
- ego->pub_key = emsg->ego_pub_key;
- ego->name = GNUNET_malloc (name_size);
- GNUNET_memcpy (ego->name, &emsg[1], name_size);
- }
- else
- {
- ego->name = GNUNET_realloc (ego->name, name_size);
- GNUNET_memcpy (ego->name, &emsg[1], name_size);
- }
-
- GNUNET_CONTAINER_multihashmap_put (app->egos, &ego_pub_hash, ego,
- GNUNET_CONTAINER_MULTIHASHMAPOPTION_REPLACE);
-
- if (NULL != app->ego_cb)
- app->ego_cb (app->cb_cls, ego, &ego->pub_key, ego->name);
- }
-
-
- static void
- handle_app_ego_end (void *cls,
- const struct GNUNET_MessageHeader *msg)
- {
- //struct GNUNET_SOCIAL_App *app = cls;
- }
-
-
- static int
- check_app_place (void *cls,
- const struct AppPlaceMessage *pmsg)
- {
- return GNUNET_OK;
- }
-
-
- static void
- handle_app_place (void *cls,
- const struct AppPlaceMessage *pmsg)
- {
- struct GNUNET_SOCIAL_App *app = cls;
-
- if ((GNUNET_YES == pmsg->is_host && NULL == app->host_cb)
- || (GNUNET_NO == pmsg->is_host && NULL == app->guest_cb))
- return;
-
- struct GNUNET_HashCode ego_pub_hash;
- GNUNET_CRYPTO_hash (&pmsg->ego_pub_key, sizeof (pmsg->ego_pub_key),
- &ego_pub_hash);
- struct GNUNET_SOCIAL_Ego *
- ego = GNUNET_CONTAINER_multihashmap_get (app->egos, &ego_pub_hash);
- if (NULL == ego)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "Failure to obtain ego %s.\n",
- GNUNET_h2s (&ego_pub_hash));
- GNUNET_break (0);
- return;
- }
-
- if (GNUNET_YES == pmsg->is_host)
- {
- if (NULL != app->host_cb) {
- struct GNUNET_SOCIAL_HostConnection *hconn = GNUNET_malloc (sizeof (*hconn));
- hconn->app = app;
- hconn->plc_msg = *pmsg;
- app->host_cb (app->cb_cls, hconn, ego, &pmsg->place_pub_key, pmsg->place_state);
- GNUNET_free (hconn);
- }
- }
- else if (NULL != app->guest_cb)
- {
- struct GNUNET_SOCIAL_GuestConnection *gconn = GNUNET_malloc (sizeof (*gconn));
- gconn->app = app;
- gconn->plc_msg = *pmsg;
- app->guest_cb (app->cb_cls, gconn, ego, &pmsg->place_pub_key, pmsg->place_state);
- GNUNET_free (gconn);
- }
- }
-
-
- static void
- handle_app_place_end (void *cls,
- const struct GNUNET_MessageHeader *msg)
- {
- struct GNUNET_SOCIAL_App *app = cls;
-
- if (NULL != app->connected_cb)
- app->connected_cb (app->cb_cls);
- }
-
-
- /**
- * Handler for a #GNUNET_MESSAGE_TYPE_SOCIAL_PLACE_LEAVE_ACK message received
- * from the social service.
- *
- * @param cls the place of type `struct GNUNET_SOCIAL_Place`
- * @param msg the message received from the service
- */
- static void
- handle_place_leave_ack (void *cls,
- const struct GNUNET_MessageHeader *msg)
- {
- struct GNUNET_SOCIAL_Place *plc = cls;
-
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "%s left place %p\n",
- plc->is_host ? "host" : "guest",
- plc);
- place_disconnect (plc);
- }
-
-
- /*** HOST ***/
-
-
- static void
- host_connect (struct GNUNET_SOCIAL_Host *hst);
-
-
- static void
- host_reconnect (void *cls)
- {
- host_connect (cls);
- }
-
-
- /**
- * Host client disconnected from service.
- *
- * Reconnect after backoff period.
- */
- static void
- host_disconnected (void *cls, enum GNUNET_MQ_Error error)
- {
- struct GNUNET_SOCIAL_Host *hst = cls;
- struct GNUNET_SOCIAL_Place *plc = &hst->plc;
-
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "Host client disconnected (%d), re-connecting\n",
- (int) error);
- if (NULL != plc->tmit)
- {
- GNUNET_PSYC_transmit_destroy (plc->tmit);
- plc->tmit = NULL;
- }
- if (NULL != plc->mq)
- {
- GNUNET_MQ_destroy (plc->mq);
- plc->mq = NULL;
- }
-
- plc->reconnect_task = GNUNET_SCHEDULER_add_delayed (plc->reconnect_delay,
- host_reconnect,
- hst);
- plc->reconnect_delay = GNUNET_TIME_STD_BACKOFF (plc->reconnect_delay);
- }
-
-
- static void
- host_connect (struct GNUNET_SOCIAL_Host *hst)
- {
- struct GNUNET_SOCIAL_Place *plc = &hst->plc;
-
- struct GNUNET_MQ_MessageHandler handlers[] = {
- GNUNET_MQ_hd_fixed_size (host_enter_ack,
- GNUNET_MESSAGE_TYPE_SOCIAL_HOST_ENTER_ACK,
- struct HostEnterAck,
- hst),
- GNUNET_MQ_hd_fixed_size (place_leave_ack,
- GNUNET_MESSAGE_TYPE_SOCIAL_PLACE_LEAVE_ACK,
- struct GNUNET_MessageHeader,
- plc),
- GNUNET_MQ_hd_var_size (host_enter_request,
- GNUNET_MESSAGE_TYPE_PSYC_JOIN_REQUEST,
- struct GNUNET_PSYC_JoinRequestMessage,
- hst),
- GNUNET_MQ_hd_var_size (host_message,
- GNUNET_MESSAGE_TYPE_PSYC_MESSAGE,
- struct GNUNET_PSYC_MessageHeader,
- hst),
- GNUNET_MQ_hd_fixed_size (place_message_ack,
- GNUNET_MESSAGE_TYPE_PSYC_MESSAGE_ACK,
- struct GNUNET_MessageHeader,
- plc),
- GNUNET_MQ_hd_var_size (place_history_result,
- GNUNET_MESSAGE_TYPE_PSYC_HISTORY_RESULT,
- struct GNUNET_OperationResultMessage,
- plc),
- GNUNET_MQ_hd_var_size (place_state_result,
- GNUNET_MESSAGE_TYPE_PSYC_STATE_RESULT,
- struct GNUNET_OperationResultMessage,
- plc),
- GNUNET_MQ_hd_var_size (place_result,
- GNUNET_MESSAGE_TYPE_PSYC_RESULT_CODE,
- struct GNUNET_OperationResultMessage,
- plc),
- GNUNET_MQ_handler_end ()
- };
-
- plc->mq = GNUNET_CLIENT_connect (plc->cfg, "social",
- handlers, host_disconnected, hst);
- GNUNET_assert (NULL != plc->mq);
- plc->tmit = GNUNET_PSYC_transmit_create (plc->mq);
-
- GNUNET_MQ_send_copy (plc->mq, plc->connect_env);
- }
-
-
- /**
- * Enter a place as host.
- *
- * A place is created upon first entering, and it is active until permanently
- * left using GNUNET_SOCIAL_host_leave().
- *
- * @param app
- * Application handle.
- * @param ego
- * Identity of the host.
- * @param policy
- * Policy specifying entry and history restrictions for the place.
- * @param slicer
- * Slicer to handle incoming messages.
- * @param enter_cb
- * Function called when the place is entered and ready to use.
- * @param answer_door_cb
- * Function to handle new nyms that want to enter.
- * @param farewell_cb
- * Function to handle departing nyms.
- * @param cls
- * Closure for the callbacks.
- *
- * @return Handle for the host. This handle contains the pubkey.
- */
- struct GNUNET_SOCIAL_Host *
- GNUNET_SOCIAL_host_enter (const struct GNUNET_SOCIAL_App *app,
- const struct GNUNET_SOCIAL_Ego *ego,
- enum GNUNET_PSYC_Policy policy,
- struct GNUNET_PSYC_Slicer *slicer,
- GNUNET_SOCIAL_HostEnterCallback enter_cb,
- GNUNET_SOCIAL_AnswerDoorCallback answer_door_cb,
- GNUNET_SOCIAL_FarewellCallback farewell_cb,
- void *cls)
- {
- struct GNUNET_SOCIAL_Host *hst = GNUNET_malloc (sizeof (*hst));
- struct GNUNET_SOCIAL_Place *plc = &hst->plc;
-
- plc->cfg = app->cfg;
- plc->is_host = GNUNET_YES;
- plc->slicer = slicer;
-
- hst->enter_cb = enter_cb;
- hst->answer_door_cb = answer_door_cb;
- hst->farewell_cb = farewell_cb;
- hst->cb_cls = cls;
-
- plc->op = GNUNET_OP_create ();
-
- hst->slicer = GNUNET_PSYC_slicer_create ();
- GNUNET_PSYC_slicer_method_add (hst->slicer, "_notice_place_leave", NULL,
- host_recv_notice_place_leave_method,
- host_recv_notice_place_leave_modifier,
- NULL, host_recv_notice_place_leave_eom, hst);
-
- uint16_t app_id_size = strlen (app->id) + 1;
- struct HostEnterRequest *hreq;
- plc->connect_env = GNUNET_MQ_msg_extra (hreq, app_id_size,
- GNUNET_MESSAGE_TYPE_SOCIAL_HOST_ENTER);
- hreq->policy = policy;
- hreq->ego_pub_key = ego->pub_key;
- GNUNET_memcpy (&hreq[1], app->id, app_id_size);
-
- host_connect (hst);
- return hst;
- }
-
-
- /**
- * Reconnect to an already entered place as host.
- *
- * @param hconn
- * Host connection handle.
- * @see GNUNET_SOCIAL_app_connect() & GNUNET_SOCIAL_AppHostPlaceCallback()
- * @param slicer
- * Slicer to handle incoming messages.
- * @param enter_cb
- * Function called when the place is entered and ready to use.
- * @param answer_door_cb
- * Function to handle new nyms that want to enter.
- * @param farewell_cb
- * Function to handle departing nyms.
- * @param cls
- * Closure for the callbacks.
- *
- * @return Handle for the host.
- */
- struct GNUNET_SOCIAL_Host *
- GNUNET_SOCIAL_host_enter_reconnect (struct GNUNET_SOCIAL_HostConnection *hconn,
- struct GNUNET_PSYC_Slicer *slicer,
- GNUNET_SOCIAL_HostEnterCallback enter_cb,
- GNUNET_SOCIAL_AnswerDoorCallback answer_door_cb,
- GNUNET_SOCIAL_FarewellCallback farewell_cb,
- void *cls)
- {
- struct GNUNET_SOCIAL_Host *hst = GNUNET_malloc (sizeof (*hst));
- struct GNUNET_SOCIAL_Place *plc = &hst->plc;
-
- hst->enter_cb = enter_cb;
- hst->answer_door_cb = answer_door_cb;
- hst->farewell_cb = farewell_cb;
- hst->cb_cls = cls;
-
- plc->cfg = hconn->app->cfg;
- plc->is_host = GNUNET_YES;
- plc->slicer = slicer;
- plc->pub_key = hconn->plc_msg.place_pub_key;
- plc->ego_pub_key = hconn->plc_msg.ego_pub_key;
-
- plc->op = GNUNET_OP_create ();
-
- hst->slicer = GNUNET_PSYC_slicer_create ();
- GNUNET_PSYC_slicer_method_add (hst->slicer, "_notice_place_leave", NULL,
- host_recv_notice_place_leave_method,
- host_recv_notice_place_leave_modifier,
- NULL, host_recv_notice_place_leave_eom, hst);
-
- size_t app_id_size = strlen (hconn->app->id) + 1;
- struct HostEnterRequest *hreq;
- plc->connect_env = GNUNET_MQ_msg_extra (hreq, app_id_size,
- GNUNET_MESSAGE_TYPE_SOCIAL_HOST_ENTER);
- hreq->place_pub_key = hconn->plc_msg.place_pub_key;
- hreq->ego_pub_key = hconn->plc_msg.ego_pub_key;
- GNUNET_memcpy (&hreq[1], hconn->app->id, app_id_size);
-
- host_connect (hst);
- return hst;
- }
-
-
- /**
- * Decision whether to admit @a nym into the place or refuse entry.
- *
- * @param hst
- * Host of the place.
- * @param nym
- * Handle for the entity that wanted to enter.
- * @param is_admitted
- * #GNUNET_YES if @a nym is admitted,
- * #GNUNET_NO if @a nym is refused entry,
- * #GNUNET_SYSERR if we cannot answer the request.
- * @param method_name
- * Method name for the rejection message.
- * @param env
- * Environment containing variables for the message, or NULL.
- * @param data
- * Data for the rejection message to send back.
- * @param data_size
- * Number of bytes in @a data for method.
- * @return #GNUNET_OK on success,
- * #GNUNET_SYSERR if the message is too large.
- */
- int
- GNUNET_SOCIAL_host_entry_decision (struct GNUNET_SOCIAL_Host *hst,
- struct GNUNET_SOCIAL_Nym *nym,
- int is_admitted,
- const struct GNUNET_PSYC_Message *entry_resp)
- {
- struct GNUNET_SOCIAL_Place *plc = &hst->plc;
- struct GNUNET_PSYC_JoinDecisionMessage *dcsn;
- uint16_t entry_resp_size
- = (NULL != entry_resp) ? ntohs (entry_resp->header.size) : 0;
-
- if (GNUNET_MULTICAST_FRAGMENT_MAX_PAYLOAD < sizeof (*dcsn) + entry_resp_size)
- return GNUNET_SYSERR;
-
- struct GNUNET_MQ_Envelope *
- env = GNUNET_MQ_msg_extra (dcsn, entry_resp_size,
- GNUNET_MESSAGE_TYPE_PSYC_JOIN_DECISION);
- dcsn->is_admitted = htonl (is_admitted);
- dcsn->slave_pub_key = nym->pub_key;
-
- if (0 < entry_resp_size)
- GNUNET_memcpy (&dcsn[1], entry_resp, entry_resp_size);
-
- GNUNET_MQ_send (plc->mq, env);
- return GNUNET_OK;
- }
-
-
- /**
- * Throw @a nym out of the place.
- *
- * The @a nym reference will remain valid until the
- * #GNUNET_SOCIAL_FarewellCallback is invoked,
- * which should be very soon after this call.
- *
- * @param host
- * Host of the place.
- * @param nym
- * Handle for the entity to be ejected.
- * @param env
- * Environment for the message or NULL.
- */
- void
- GNUNET_SOCIAL_host_eject (struct GNUNET_SOCIAL_Host *hst,
- const struct GNUNET_SOCIAL_Nym *nym,
- struct GNUNET_PSYC_Environment *e)
- {
- struct GNUNET_PSYC_Environment *env = e;
- if (NULL == env)
- env = GNUNET_PSYC_env_create ();
- GNUNET_PSYC_env_add (env, GNUNET_PSYC_OP_SET,
- "_nym", &nym->pub_key, sizeof (nym->pub_key));
- GNUNET_SOCIAL_host_announce (hst, "_notice_place_leave", env, NULL, NULL,
- GNUNET_SOCIAL_ANNOUNCE_NONE);
- if (NULL == e)
- GNUNET_PSYC_env_destroy (env);
- }
-
-
- /**
- * Get the public key of @a ego.
- *
- * @param ego
- * Ego.
- *
- * @return Public key of ego.
- */
- const struct GNUNET_CRYPTO_EcdsaPublicKey *
- GNUNET_SOCIAL_ego_get_pub_key (const struct GNUNET_SOCIAL_Ego *ego)
- {
- return &ego->pub_key;
- }
-
-
- /**
- * Get the hash of the public key of @a ego.
- *
- * @param ego
- * Ego.
- *
- * @return Hash of the public key of @a ego.
- */
- const struct GNUNET_HashCode *
- GNUNET_SOCIAL_ego_get_pub_key_hash (const struct GNUNET_SOCIAL_Ego *ego)
- {
- return &ego->pub_key_hash;
- }
-
-
- /**
- * Get the name of @a ego.
- *
- * @param ego
- * Ego.
- *
- * @return Public key of @a ego.
- */
- const char *
- GNUNET_SOCIAL_ego_get_name (const struct GNUNET_SOCIAL_Ego *ego)
- {
- return ego->name;
- }
-
-
- /**
- * Get the public key of @a nym.
- *
- * Suitable, for example, to be used with GNUNET_SOCIAL_zone_add_nym().
- *
- * @param nym
- * Pseudonym.
- *
- * @return Public key of @a nym.
- */
- const struct GNUNET_CRYPTO_EcdsaPublicKey *
- GNUNET_SOCIAL_nym_get_pub_key (const struct GNUNET_SOCIAL_Nym *nym)
- {
- return &nym->pub_key;
- }
-
-
- /**
- * Get the hash of the public key of @a nym.
- *
- * @param nym
- * Pseudonym.
- *
- * @return Hash of the public key of @a nym.
- */
- const struct GNUNET_HashCode *
- GNUNET_SOCIAL_nym_get_pub_key_hash (const struct GNUNET_SOCIAL_Nym *nym)
- {
- return &nym->pub_key_hash;
- }
-
-
- /**
- * Send a message to all nyms that are present in the place.
- *
- * This function is restricted to the host. Nyms can only send requests
- * to the host who can decide to relay it to everyone in the place.
- *
- * @param host Host of the place.
- * @param method_name Method to use for the announcement.
- * @param env Environment containing variables for the message and operations
- * on objects of the place. Can be NULL.
- * @param notify Function to call to get the payload of the announcement.
- * @param notify_cls Closure for @a notify.
- * @param flags Flags for this announcement.
- *
- * @return NULL on error (announcement already in progress?).
- */
- struct GNUNET_SOCIAL_Announcement *
- GNUNET_SOCIAL_host_announce (struct GNUNET_SOCIAL_Host *hst,
- const char *method_name,
- const struct GNUNET_PSYC_Environment *env,
- GNUNET_PSYC_TransmitNotifyData notify_data,
- void *notify_data_cls,
- enum GNUNET_SOCIAL_AnnounceFlags flags)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "PSYC_transmit_message for host, method: %s\n",
- method_name);
- if (GNUNET_OK ==
- GNUNET_PSYC_transmit_message (hst->plc.tmit, method_name, env,
- NULL, notify_data, notify_data_cls, flags))
- return (struct GNUNET_SOCIAL_Announcement *) hst->plc.tmit;
- else
- return NULL;
- }
-
-
- /**
- * Resume transmitting announcement.
- *
- * @param a
- * The announcement to resume.
- */
- void
- GNUNET_SOCIAL_host_announce_resume (struct GNUNET_SOCIAL_Announcement *a)
- {
- GNUNET_PSYC_transmit_resume ((struct GNUNET_PSYC_TransmitHandle *) a);
- }
-
-
- /**
- * Cancel announcement.
- *
- * @param a
- * The announcement to cancel.
- */
- void
- GNUNET_SOCIAL_host_announce_cancel (struct GNUNET_SOCIAL_Announcement *a)
- {
- GNUNET_PSYC_transmit_cancel ((struct GNUNET_PSYC_TransmitHandle *) a);
- }
-
-
- /**
- * Obtain handle for a hosted place.
- *
- * The returned handle can be used to access the place API.
- *
- * @param host Handle for the host.
- *
- * @return Handle for the hosted place, valid as long as @a host is valid.
- */
- struct GNUNET_SOCIAL_Place *
- GNUNET_SOCIAL_host_get_place (struct GNUNET_SOCIAL_Host *hst)
- {
- return &hst->plc;
- }
-
-
- /**
- * Disconnect from a home.
- *
- * Invalidates host handle.
- *
- * @param hst
- * The host to disconnect.
- */
- void
- GNUNET_SOCIAL_host_disconnect (struct GNUNET_SOCIAL_Host *hst,
- GNUNET_ContinuationCallback disconnect_cb,
- void *cls)
- {
- struct GNUNET_SOCIAL_Place *plc = &hst->plc;
-
- plc->disconnect_cb = disconnect_cb;
- plc->disconnect_cls = cls;
- place_disconnect (plc);
- }
-
-
- /**
- * Stop hosting the home.
- *
- * Sends a _notice_place_closing announcement to the home.
- * Invalidates host handle.
- *
- * @param hst
- * The host leaving.
- * @param env
- * Environment for the message or NULL.
- * _nym is set to @e nym regardless whether an @e env is provided.
- * @param disconnect_cb
- * Function called after the host left the place
- * and disconnected from the social service.
- * @param cls
- * Closure for @a disconnect_cb.
- */
- void
- GNUNET_SOCIAL_host_leave (struct GNUNET_SOCIAL_Host *hst,
- const struct GNUNET_PSYC_Environment *env,
- GNUNET_ContinuationCallback disconnect_cb,
- void *cls)
- {
- struct GNUNET_MQ_Envelope *envelope;
-
- GNUNET_SOCIAL_host_announce (hst, "_notice_place_closing", env, NULL, NULL,
- GNUNET_SOCIAL_ANNOUNCE_NONE);
- hst->plc.disconnect_cb = disconnect_cb;
- hst->plc.disconnect_cls = cls;
- envelope = GNUNET_MQ_msg_header (GNUNET_MESSAGE_TYPE_SOCIAL_PLACE_LEAVE);
- GNUNET_MQ_send (hst->plc.mq,
- envelope);
- }
-
-
- /*** GUEST ***/
-
-
- static void
- guest_connect (struct GNUNET_SOCIAL_Guest *gst);
-
-
- static void
- guest_reconnect (void *cls)
- {
- guest_connect (cls);
- }
-
-
- /**
- * Guest client disconnected from service.
- *
- * Reconnect after backoff period.
- */
- static void
- guest_disconnected (void *cls, enum GNUNET_MQ_Error error)
- {
- struct GNUNET_SOCIAL_Guest *gst = cls;
- struct GNUNET_SOCIAL_Place *plc = &gst->plc;
-
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "Guest client disconnected (%d), re-connecting\n",
- (int) error);
- if (NULL != plc->tmit)
- {
- GNUNET_PSYC_transmit_destroy (plc->tmit);
- plc->tmit = NULL;
- }
- if (NULL != plc->mq)
- {
- GNUNET_MQ_destroy (plc->mq);
- plc->mq = NULL;
- }
-
- plc->reconnect_task = GNUNET_SCHEDULER_add_delayed (plc->reconnect_delay,
- guest_reconnect,
- gst);
- plc->reconnect_delay = GNUNET_TIME_STD_BACKOFF (plc->reconnect_delay);
- }
-
-
- static void
- guest_connect (struct GNUNET_SOCIAL_Guest *gst)
- {
- struct GNUNET_SOCIAL_Place *plc = &gst->plc;
-
- struct GNUNET_MQ_MessageHandler handlers[] = {
- GNUNET_MQ_hd_fixed_size (guest_enter_ack,
- GNUNET_MESSAGE_TYPE_SOCIAL_GUEST_ENTER_ACK,
- struct GNUNET_PSYC_CountersResultMessage,
- gst),
- GNUNET_MQ_hd_fixed_size (place_leave_ack,
- GNUNET_MESSAGE_TYPE_SOCIAL_PLACE_LEAVE_ACK,
- struct GNUNET_MessageHeader,
- plc),
- GNUNET_MQ_hd_var_size (guest_enter_decision,
- GNUNET_MESSAGE_TYPE_PSYC_JOIN_DECISION,
- struct GNUNET_PSYC_JoinDecisionMessage,
- gst),
- GNUNET_MQ_hd_var_size (place_message,
- GNUNET_MESSAGE_TYPE_PSYC_MESSAGE,
- struct GNUNET_PSYC_MessageHeader,
- plc),
- GNUNET_MQ_hd_fixed_size (place_message_ack,
- GNUNET_MESSAGE_TYPE_PSYC_MESSAGE_ACK,
- struct GNUNET_MessageHeader,
- plc),
- GNUNET_MQ_hd_var_size (place_history_result,
- GNUNET_MESSAGE_TYPE_PSYC_HISTORY_RESULT,
- struct GNUNET_OperationResultMessage,
- plc),
- GNUNET_MQ_hd_var_size (place_state_result,
- GNUNET_MESSAGE_TYPE_PSYC_STATE_RESULT,
- struct GNUNET_OperationResultMessage,
- plc),
- GNUNET_MQ_hd_var_size (place_result,
- GNUNET_MESSAGE_TYPE_PSYC_RESULT_CODE,
- struct GNUNET_OperationResultMessage,
- plc),
- GNUNET_MQ_handler_end ()
- };
-
- plc->mq = GNUNET_CLIENT_connect (plc->cfg, "social",
- handlers, guest_disconnected, gst);
- GNUNET_assert (NULL != plc->mq);
- plc->tmit = GNUNET_PSYC_transmit_create (plc->mq);
-
- GNUNET_MQ_send_copy (plc->mq, plc->connect_env);
- }
-
-
- static struct GNUNET_MQ_Envelope *
- guest_enter_request_create (const char *app_id,
- const struct GNUNET_CRYPTO_EcdsaPublicKey *ego_pub_key,
- const struct GNUNET_CRYPTO_EddsaPublicKey *place_pub_key,
- const struct GNUNET_PeerIdentity *origin,
- size_t relay_count,
- const struct GNUNET_PeerIdentity *relays,
- const struct GNUNET_PSYC_Message *join_msg)
- {
- uint16_t app_id_size = strlen (app_id) + 1;
- uint16_t join_msg_size = ntohs (join_msg->header.size);
- uint16_t relay_size = relay_count * sizeof (*relays);
-
- struct GuestEnterRequest *greq;
- struct GNUNET_MQ_Envelope *
- env = GNUNET_MQ_msg_extra (greq, app_id_size + relay_size + join_msg_size,
- GNUNET_MESSAGE_TYPE_SOCIAL_GUEST_ENTER);
- greq->place_pub_key = *place_pub_key;
- greq->ego_pub_key = *ego_pub_key;
- greq->origin = *origin;
- greq->relay_count = htonl (relay_count);
-
- char *p = (char *) &greq[1];
- GNUNET_memcpy (p, app_id, app_id_size);
- p += app_id_size;
-
- if (0 < relay_size)
- {
- GNUNET_memcpy (p, relays, relay_size);
- p += relay_size;
- }
-
- GNUNET_memcpy (p, join_msg, join_msg_size);
- return env;
- }
-
-
- /**
- * Request entry to a place as a guest.
- *
- * @param app
- * Application handle.
- * @param ego
- * Identity of the guest.
- * @param place_pub_key
- * Public key of the place to enter.
- * @param flags
- * Flags for the entry.
- * @param origin
- * Peer identity of the origin of the underlying multicast group.
- * @param relay_count
- * Number of elements in the @a relays array.
- * @param relays
- * Relays for the underlying multicast group.
- * @param method_name
- * Method name for the message.
- * @param env
- * Environment containing variables for the message, or NULL.
- * @param data
- * Payload for the message to give to the enter callback.
- * @param data_size
- * Number of bytes in @a data.
- * @param slicer
- * Slicer to use for processing incoming requests from guests.
- *
- * @return NULL on errors, otherwise handle for the guest.
- */
- struct GNUNET_SOCIAL_Guest *
- GNUNET_SOCIAL_guest_enter (const struct GNUNET_SOCIAL_App *app,
- const struct GNUNET_SOCIAL_Ego *ego,
- const struct GNUNET_CRYPTO_EddsaPublicKey *place_pub_key,
- enum GNUNET_PSYC_SlaveJoinFlags flags,
- const struct GNUNET_PeerIdentity *origin,
- uint32_t relay_count,
- const struct GNUNET_PeerIdentity *relays,
- const struct GNUNET_PSYC_Message *entry_msg,
- struct GNUNET_PSYC_Slicer *slicer,
- GNUNET_SOCIAL_GuestEnterCallback local_enter_cb,
- GNUNET_SOCIAL_EntryDecisionCallback entry_dcsn_cb,
- void *cls)
- {
- struct GNUNET_SOCIAL_Guest *gst = GNUNET_malloc (sizeof (*gst));
- struct GNUNET_SOCIAL_Place *plc = &gst->plc;
-
- plc->ego_pub_key = ego->pub_key;
- plc->pub_key = *place_pub_key;
- plc->cfg = app->cfg;
- plc->is_host = GNUNET_NO;
- plc->slicer = slicer;
-
- plc->op = GNUNET_OP_create ();
-
- plc->connect_env
- = guest_enter_request_create (app->id, &ego->pub_key, &plc->pub_key,
- origin, relay_count, relays, entry_msg);
-
- gst->enter_cb = local_enter_cb;
- gst->entry_dcsn_cb = entry_dcsn_cb;
- gst->cb_cls = cls;
-
- guest_connect (gst);
- return gst;
- }
-
-
- /**
- * Request entry to a place by name as a guest.
- *
- * @param app
- * Application handle.
- * @param ego
- * Identity of the guest.
- * @param gns_name
- * GNS name of the place to enter. Either in the form of
- * 'room.friend.gnu', or 'NYMPUBKEY.zkey'. This latter case refers to
- * the 'PLACE' record of the empty label ("+") in the GNS zone with the
- * nym's public key 'NYMPUBKEY', and can be used to request entry to a
- * pseudonym's place directly.
- * @param password
- * Password to decrypt the record, or NULL for cleartext records.
- * @param join_msg
- * Entry request message or NULL.
- * @param slicer
- * Slicer to use for processing incoming requests from guests.
- * @param local_enter_cb
- * Called upon connection established to the social service.
- * @param entry_decision_cb
- * Called upon receiving entry decision.
- *
- * @return NULL on errors, otherwise handle for the guest.
- */
- struct GNUNET_SOCIAL_Guest *
- GNUNET_SOCIAL_guest_enter_by_name (const struct GNUNET_SOCIAL_App *app,
- const struct GNUNET_SOCIAL_Ego *ego,
- const char *gns_name,
- const char *password,
- const struct GNUNET_PSYC_Message *join_msg,
- struct GNUNET_PSYC_Slicer *slicer,
- GNUNET_SOCIAL_GuestEnterCallback local_enter_cb,
- GNUNET_SOCIAL_EntryDecisionCallback entry_decision_cb,
- void *cls)
- {
- struct GNUNET_SOCIAL_Guest *gst = GNUNET_malloc (sizeof (*gst));
- struct GNUNET_SOCIAL_Place *plc = &gst->plc;
-
- if (NULL == password)
- password = "";
-
- uint16_t app_id_size = strlen (app->id) + 1;
- uint16_t gns_name_size = strlen (gns_name) + 1;
- uint16_t password_size = strlen (password) + 1;
-
- uint16_t join_msg_size = 0;
- if (NULL != join_msg)
- join_msg_size = ntohs (join_msg->header.size);
-
- struct GuestEnterByNameRequest *greq;
- plc->connect_env
- = GNUNET_MQ_msg_extra (greq, app_id_size + gns_name_size
- + password_size + join_msg_size,
- GNUNET_MESSAGE_TYPE_SOCIAL_GUEST_ENTER_BY_NAME);
-
- greq->ego_pub_key = ego->pub_key;
-
- char *p = (char *) &greq[1];
- GNUNET_memcpy (p, app->id, app_id_size);
- p += app_id_size;
- GNUNET_memcpy (p, gns_name, gns_name_size);
- p += gns_name_size;
- GNUNET_memcpy (p, password, password_size);
- p += password_size;
- if (NULL != join_msg)
- GNUNET_memcpy (p, join_msg, join_msg_size);
-
- plc->ego_pub_key = ego->pub_key;
- plc->cfg = app->cfg;
- plc->is_host = GNUNET_NO;
- plc->slicer = slicer;
-
- plc->op = GNUNET_OP_create ();
-
- gst->enter_cb = local_enter_cb;
- gst->entry_dcsn_cb = entry_decision_cb;
- gst->cb_cls = cls;
-
- guest_connect (gst);
- return gst;
- }
-
-
- struct ReconnectContext
- {
- struct GNUNET_SOCIAL_Guest *guest;
- int *result;
- int64_t *max_message_id;
- GNUNET_SOCIAL_GuestEnterCallback enter_cb;
- void *enter_cls;
- };
-
-
- static void
- guest_enter_reconnect_cb (void *cls,
- int result,
- const struct GNUNET_CRYPTO_EddsaPublicKey *place_pub_key,
- uint64_t max_message_id)
- {
- struct ReconnectContext *reconnect_ctx = cls;
-
- GNUNET_assert (NULL != reconnect_ctx);
- reconnect_ctx->result = GNUNET_new (int);
- *(reconnect_ctx->result) = result;
- reconnect_ctx->max_message_id = GNUNET_new (int64_t);
- *(reconnect_ctx->max_message_id) = max_message_id;
- }
-
-
- static void
- guest_entry_dcsn_reconnect_cb (void *cls,
- int is_admitted,
- const struct GNUNET_PSYC_Message *entry_resp)
- {
- struct ReconnectContext *reconnect_ctx = cls;
- struct GNUNET_SOCIAL_Guest *gst = reconnect_ctx->guest;
-
- GNUNET_assert (NULL != reconnect_ctx);
- GNUNET_assert (NULL != reconnect_ctx->result);
- GNUNET_assert (NULL != reconnect_ctx->max_message_id);
- if (GNUNET_YES != is_admitted)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
- "Guest was rejected after calling "
- "GNUNET_SOCIAL_guest_enter_reconnect ()\n");
- }
- else if (NULL != reconnect_ctx->enter_cb)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "guest reconnected!\n");
- reconnect_ctx->enter_cb (reconnect_ctx->enter_cls,
- *(reconnect_ctx->result),
- &gst->plc.pub_key,
- *(reconnect_ctx->max_message_id));
- }
- GNUNET_free (reconnect_ctx->result);
- GNUNET_free (reconnect_ctx->max_message_id);
- GNUNET_free (reconnect_ctx);
- }
-
-
- /**
- * Reconnect to an already entered place as guest.
- *
- * @param gconn
- * Guest connection handle.
- * @see GNUNET_SOCIAL_app_connect() & GNUNET_SOCIAL_AppGuestPlaceCallback()
- * @param flags
- * Flags for the entry.
- * @param slicer
- * Slicer to use for processing incoming requests from guests.
- * @param enter_cb
- * Called upon re-entering is complete.
- * @param entry_decision_cb
- * Called upon receiving entry decision.
- *
- * @return NULL on errors, otherwise handle for the guest.
- */
- struct GNUNET_SOCIAL_Guest *
- GNUNET_SOCIAL_guest_enter_reconnect (struct GNUNET_SOCIAL_GuestConnection *gconn,
- enum GNUNET_PSYC_SlaveJoinFlags flags,
- struct GNUNET_PSYC_Slicer *slicer,
- GNUNET_SOCIAL_GuestEnterCallback enter_cb,
- void *cls)
- {
- struct GNUNET_SOCIAL_Guest *gst = GNUNET_malloc (sizeof (*gst));
- struct GNUNET_SOCIAL_Place *plc = &gst->plc;
- struct ReconnectContext *reconnect_ctx;
-
- uint16_t app_id_size = strlen (gconn->app->id) + 1;
- struct GuestEnterRequest *greq;
- plc->connect_env
- = GNUNET_MQ_msg_extra (greq, app_id_size,
- GNUNET_MESSAGE_TYPE_SOCIAL_GUEST_ENTER);
- greq->ego_pub_key = gconn->plc_msg.ego_pub_key;
- greq->place_pub_key = gconn->plc_msg.place_pub_key;
- greq->flags = htonl (flags);
-
- GNUNET_memcpy (&greq[1], gconn->app->id, app_id_size);
-
- plc->cfg = gconn->app->cfg;
- plc->is_host = GNUNET_NO;
- plc->slicer = slicer;
- plc->pub_key = gconn->plc_msg.place_pub_key;
- plc->ego_pub_key = gconn->plc_msg.ego_pub_key;
-
- reconnect_ctx = GNUNET_new (struct ReconnectContext);
- reconnect_ctx->guest = gst;
- reconnect_ctx->enter_cb = enter_cb;
- reconnect_ctx->enter_cls = cls;
-
- plc->op = GNUNET_OP_create ();
- gst->enter_cb = &guest_enter_reconnect_cb;
- gst->entry_dcsn_cb = &guest_entry_dcsn_reconnect_cb;
- gst->cb_cls = reconnect_ctx;
-
- guest_connect (gst);
- return gst;
- }
-
-
- /**
- * Talk to the host of the place.
- *
- * @param place
- * Place where we want to talk to the host.
- * @param method_name
- * Method to invoke on the host.
- * @param env
- * Environment containing variables for the message, or NULL.
- * @param notify_data
- * Function to use to get the payload for the method.
- * @param notify_data_cls
- * Closure for @a notify_data.
- * @param flags
- * Flags for the message being sent.
- *
- * @return NULL if we are already trying to talk to the host,
- * otherwise handle to cancel the request.
- */
- struct GNUNET_SOCIAL_TalkRequest *
- GNUNET_SOCIAL_guest_talk (struct GNUNET_SOCIAL_Guest *gst,
- const char *method_name,
- const struct GNUNET_PSYC_Environment *env,
- GNUNET_PSYC_TransmitNotifyData notify_data,
- void *notify_data_cls,
- enum GNUNET_SOCIAL_TalkFlags flags)
- {
- struct GNUNET_SOCIAL_Place *plc = &gst->plc;
- GNUNET_assert (NULL != plc->tmit);
-
- if (GNUNET_OK ==
- GNUNET_PSYC_transmit_message (plc->tmit, method_name, env,
- NULL, notify_data, notify_data_cls, flags))
- return (struct GNUNET_SOCIAL_TalkRequest *) plc->tmit;
- else
- return NULL;
- }
-
-
- /**
- * Resume talking to the host of the place.
- *
- * @param tr
- * Talk request to resume.
- */
- void
- GNUNET_SOCIAL_guest_talk_resume (struct GNUNET_SOCIAL_TalkRequest *tr)
- {
- GNUNET_PSYC_transmit_resume ((struct GNUNET_PSYC_TransmitHandle *) tr);
- }
-
-
- /**
- * Cancel talking to the host of the place.
- *
- * @param tr
- * Talk request to cancel.
- */
- void
- GNUNET_SOCIAL_guest_talk_cancel (struct GNUNET_SOCIAL_TalkRequest *tr)
- {
- GNUNET_PSYC_transmit_cancel ( (struct GNUNET_PSYC_TransmitHandle *) tr);
- }
-
-
- /**
- * Disconnect from a place.
- *
- * Invalidates guest handle.
- *
- * @param gst
- * The guest to disconnect.
- */
- void
- GNUNET_SOCIAL_guest_disconnect (struct GNUNET_SOCIAL_Guest *gst,
- GNUNET_ContinuationCallback disconnect_cb,
- void *cls)
- {
- struct GNUNET_SOCIAL_Place *plc = &gst->plc;
-
- plc->disconnect_cb = disconnect_cb;
- plc->disconnect_cls = cls;
- place_disconnect (plc);
- }
-
-
- /**
- * Leave a place temporarily or permanently.
- *
- * Notifies the owner of the place about leaving, and destroys the place handle.
- *
- * @param place
- * Place to leave.
- * @param keep_active
- * Keep place active after last application disconnected.
- * #GNUNET_YES or #GNUNET_NO
- * @param env
- * Optional environment for the leave message if @a keep_active
- * is #GNUNET_NO. NULL if not needed.
- * @param leave_cb
- * Called upon disconnecting from the social service.
- */
- void
- GNUNET_SOCIAL_guest_leave (struct GNUNET_SOCIAL_Guest *gst,
- struct GNUNET_PSYC_Environment *env,
- GNUNET_ContinuationCallback disconnect_cb,
- void *cls)
- {
- struct GNUNET_MQ_Envelope *envelope;
-
- GNUNET_SOCIAL_guest_talk (gst, "_notice_place_leave", env, NULL, NULL,
- GNUNET_SOCIAL_TALK_NONE);
- gst->plc.disconnect_cb = disconnect_cb;
- gst->plc.disconnect_cls = cls;
- envelope = GNUNET_MQ_msg_header (GNUNET_MESSAGE_TYPE_SOCIAL_PLACE_LEAVE);
- GNUNET_MQ_send (gst->plc.mq,
- envelope);
- }
-
-
- /**
- * Obtain handle for a place entered as guest.
- *
- * The returned handle can be used to access the place API.
- *
- * @param guest Handle for the guest.
- *
- * @return Handle for the place, valid as long as @a guest is valid.
- */
- struct GNUNET_SOCIAL_Place *
- GNUNET_SOCIAL_guest_get_place (struct GNUNET_SOCIAL_Guest *gst)
- {
- return &gst->plc;
- }
-
-
- /**
- * Obtain the public key of a place.
- *
- * @param plc
- * Place.
- *
- * @return Public key of the place.
- */
- const struct GNUNET_CRYPTO_EddsaPublicKey *
- GNUNET_SOCIAL_place_get_pub_key (const struct GNUNET_SOCIAL_Place *plc)
- {
- return &plc->pub_key;
- }
-
-
- /**
- * Set message processing @a flags for a @a method_prefix.
- *
- * @param plc
- * Place.
- * @param method_prefix
- * Method prefix @a flags apply to.
- * @param flags
- * The flags that apply to a matching @a method_prefix.
- */
- void
- GNUNET_SOCIAL_place_msg_proc_set (struct GNUNET_SOCIAL_Place *plc,
- const char *method_prefix,
- enum GNUNET_SOCIAL_MsgProcFlags flags)
- {
- GNUNET_assert (NULL != method_prefix);
- struct MsgProcRequest *mpreq;
- uint16_t method_size = strnlen (method_prefix,
- GNUNET_MAX_MESSAGE_SIZE
- - sizeof (*mpreq)) + 1;
- GNUNET_assert ('\0' == method_prefix[method_size - 1]);
-
- struct GNUNET_MQ_Envelope *
- env = GNUNET_MQ_msg_extra (mpreq, method_size,
- GNUNET_MESSAGE_TYPE_SOCIAL_MSG_PROC_SET);
- mpreq->flags = htonl (flags);
- GNUNET_memcpy (&mpreq[1], method_prefix, method_size);
-
- GNUNET_MQ_send (plc->mq, env);
- }
-
-
- /**
- * Clear all message processing flags previously set for this place.
- */
- void
- GNUNET_SOCIAL_place_msg_proc_clear (struct GNUNET_SOCIAL_Place *plc)
- {
- struct GNUNET_MessageHeader *req;
- struct GNUNET_MQ_Envelope *
- env = GNUNET_MQ_msg (req, GNUNET_MESSAGE_TYPE_SOCIAL_MSG_PROC_CLEAR);
-
- GNUNET_MQ_send (plc->mq, env);
- }
-
-
- static struct GNUNET_SOCIAL_HistoryRequest *
- place_history_replay (struct GNUNET_SOCIAL_Place *plc,
- uint64_t start_message_id,
- uint64_t end_message_id,
- uint64_t message_limit,
- const char *method_prefix,
- uint32_t flags,
- struct GNUNET_PSYC_Slicer *slicer,
- GNUNET_ResultCallback result_cb,
- void *cls)
- {
- struct GNUNET_PSYC_HistoryRequestMessage *req;
- struct GNUNET_SOCIAL_HistoryRequest *hist = GNUNET_malloc (sizeof (*hist));
- hist->plc = plc;
- hist->slicer = slicer;
- hist->result_cb = result_cb;
- hist->cls = cls;
- hist->op_id = GNUNET_OP_add (plc->op, op_recv_history_result, hist, NULL);
-
- GNUNET_assert (NULL != method_prefix);
- uint16_t method_size = strnlen (method_prefix,
- GNUNET_MAX_MESSAGE_SIZE
- - sizeof (*req)) + 1;
- GNUNET_assert ('\0' == method_prefix[method_size - 1]);
-
- struct GNUNET_MQ_Envelope *
- env = GNUNET_MQ_msg_extra (req, method_size,
- GNUNET_MESSAGE_TYPE_PSYC_HISTORY_REPLAY);
- req->start_message_id = GNUNET_htonll (start_message_id);
- req->end_message_id = GNUNET_htonll (end_message_id);
- req->message_limit = GNUNET_htonll (message_limit);
- req->flags = htonl (flags);
- req->op_id = GNUNET_htonll (hist->op_id);
- GNUNET_memcpy (&req[1], method_prefix, method_size);
-
- GNUNET_MQ_send (plc->mq, env);
- return hist;
- }
-
-
- /**
- * Learn about the history of a place.
- *
- * Messages are returned through the @a slicer function
- * and have the #GNUNET_PSYC_MESSAGE_HISTORIC flag set.
- *
- * @param place
- * Place we want to learn more about.
- * @param start_message_id
- * First historic message we are interested in.
- * @param end_message_id
- * Last historic message we are interested in (inclusive).
- * @param method_prefix
- * Only retrieve messages with this method prefix.
- * @param flags
- * OR'ed GNUNET_PSYC_HistoryReplayFlags
- * @param slicer
- * Slicer to use for retrieved messages.
- * Can be the same as the slicer of the place.
- * @param result_cb
- * Function called after all messages retrieved.
- * NULL if not needed.
- * @param cls Closure for @a result_cb.
- */
- struct GNUNET_SOCIAL_HistoryRequest *
- GNUNET_SOCIAL_place_history_replay (struct GNUNET_SOCIAL_Place *plc,
- uint64_t start_message_id,
- uint64_t end_message_id,
- const char *method_prefix,
- uint32_t flags,
- struct GNUNET_PSYC_Slicer *slicer,
- GNUNET_ResultCallback result_cb,
- void *cls)
- {
- return place_history_replay (plc, start_message_id, end_message_id, 0,
- method_prefix, flags, slicer, result_cb, cls);
- }
-
-
- /**
- * Learn about the history of a place.
- *
- * Sends messages through the slicer function of the place where
- * start_message_id <= message_id <= end_message_id.
- * The messages will have the #GNUNET_PSYC_MESSAGE_HISTORIC flag set.
- *
- * To get the latest message, use 0 for both the start and end message ID.
- *
- * @param place
- * Place we want to learn more about.
- * @param message_limit
- * Maximum number of historic messages we are interested in.
- * @param method_prefix
- * Only retrieve messages with this method prefix.
- * @param flags
- * OR'ed GNUNET_PSYC_HistoryReplayFlags
- * @param result_cb
- * Function called after all messages retrieved.
- * NULL if not needed.
- * @param cls Closure for @a result_cb.
- */
- struct GNUNET_SOCIAL_HistoryRequest *
- GNUNET_SOCIAL_place_history_replay_latest (struct GNUNET_SOCIAL_Place *plc,
- uint64_t message_limit,
- const char *method_prefix,
- uint32_t flags,
- struct GNUNET_PSYC_Slicer *slicer,
- GNUNET_ResultCallback result_cb,
- void *cls)
- {
- return place_history_replay (plc, 0, 0, message_limit, method_prefix, flags,
- slicer, result_cb, cls);
- }
-
-
- /**
- * Cancel learning about the history of a place.
- *
- * @param hist
- * History lesson to cancel.
- */
- void
- GNUNET_SOCIAL_place_history_replay_cancel (struct GNUNET_SOCIAL_HistoryRequest *hist)
- {
- GNUNET_OP_remove (hist->plc->op, hist->op_id);
- GNUNET_free (hist);
- }
-
-
- /**
- * Request matching state variables.
- */
- static struct GNUNET_SOCIAL_LookHandle *
- place_state_get (struct GNUNET_SOCIAL_Place *plc,
- uint16_t type, const char *name,
- GNUNET_PSYC_StateVarCallback var_cb,
- GNUNET_ResultCallback result_cb, void *cls)
- {
- struct GNUNET_PSYC_StateRequestMessage *req;
- struct GNUNET_SOCIAL_LookHandle *look = GNUNET_malloc (sizeof (*look));
- look->plc = plc;
- look->var_cb = var_cb;
- look->result_cb = result_cb;
- look->cls = cls;
- look->op_id = GNUNET_OP_add (plc->op, &op_recv_state_result, look, NULL);
-
- GNUNET_assert (NULL != name);
- size_t name_size = strnlen (name, GNUNET_MAX_MESSAGE_SIZE
- - sizeof (*req)) + 1;
- struct GNUNET_MQ_Envelope *
- env = GNUNET_MQ_msg_extra (req, name_size, type);
- req->op_id = GNUNET_htonll (look->op_id);
- GNUNET_memcpy (&req[1], name, name_size);
-
- GNUNET_MQ_send (plc->mq, env);
- return look;
- }
-
-
- /**
- * Look at a particular object in the place.
- *
- * The best matching object is returned (its name might be less specific than
- * what was requested).
- *
- * @param place
- * The place where to look.
- * @param full_name
- * Full name of the object.
- * @param value_size
- * Set to the size of the returned value.
- *
- * @return NULL if there is no such object at this place.
- */
- struct GNUNET_SOCIAL_LookHandle *
- GNUNET_SOCIAL_place_look_at (struct GNUNET_SOCIAL_Place *plc,
- const char *full_name,
- GNUNET_PSYC_StateVarCallback var_cb,
- GNUNET_ResultCallback result_cb,
- void *cls)
- {
- return place_state_get (plc, GNUNET_MESSAGE_TYPE_PSYC_STATE_GET,
- full_name, var_cb, result_cb, cls);
- }
-
-
- /**
- * Look for objects in the place with a matching name prefix.
- *
- * @param place
- * The place where to look.
- * @param name_prefix
- * Look at objects with names beginning with this value.
- * @param var_cb
- * Function to call for each object found.
- * @param cls
- * Closure for callback function.
- *
- * @return Handle that can be used to stop looking at objects.
- */
- struct GNUNET_SOCIAL_LookHandle *
- GNUNET_SOCIAL_place_look_for (struct GNUNET_SOCIAL_Place *plc,
- const char *name_prefix,
- GNUNET_PSYC_StateVarCallback var_cb,
- GNUNET_ResultCallback result_cb,
- void *cls)
- {
- return place_state_get (plc, GNUNET_MESSAGE_TYPE_PSYC_STATE_GET_PREFIX,
- name_prefix, var_cb, result_cb, cls);
- }
-
-
- /**
- * Cancel a state request operation.
- *
- * @param sr
- * Handle for the operation to cancel.
- */
- void
- GNUNET_SOCIAL_place_look_cancel (struct GNUNET_SOCIAL_LookHandle *look)
- {
- GNUNET_OP_remove (look->plc->op, look->op_id);
- GNUNET_free (look);
- }
-
-
- static void
- op_recv_zone_add_place_result (void *cls, int64_t result,
- const void *err_msg, uint16_t err_msg_size)
- {
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "Received zone add place result: %" PRId64 ".\n", result);
-
- struct ZoneAddPlaceHandle *add_plc = cls;
- if (NULL != add_plc->result_cb)
- add_plc->result_cb (add_plc->result_cls, result, err_msg, err_msg_size);
-
- GNUNET_free (add_plc);
- }
-
-
- /**
- * Advertise @e place in the GNS zone of @e ego.
- *
- * @param app
- * Application handle.
- * @param ego
- * Ego.
- * @param place_pub_key
- * Public key of place to add.
- * @param name
- * The name for the PLACE record to put in the zone.
- * @param password
- * Password used to encrypt the record or NULL to keep it cleartext.
- * @param relay_count
- * Number of elements in the @a relays array.
- * @param relays
- * List of relays to put in the PLACE record to advertise
- * as entry points to the place in addition to the origin.
- * @param expiration_time
- * Expiration time of the record, use 0 to remove the record.
- * @param result_cb
- * Function called with the result of the operation.
- * @param result_cls
- * Closure for @a result_cb
- *
- * @return #GNUNET_OK if the request was sent,
- * #GNUNET_SYSERR on error, e.g. the name/password is too long.
- */
- int
- GNUNET_SOCIAL_zone_add_place (const struct GNUNET_SOCIAL_App *app,
- const struct GNUNET_SOCIAL_Ego *ego,
- const char *name,
- const char *password,
- const struct GNUNET_CRYPTO_EddsaPublicKey *place_pub_key,
- const struct GNUNET_PeerIdentity *origin,
- uint32_t relay_count,
- const struct GNUNET_PeerIdentity *relays,
- struct GNUNET_TIME_Absolute expiration_time,
- GNUNET_ResultCallback result_cb,
- void *result_cls)
- {
- struct ZoneAddPlaceRequest *preq;
- size_t name_size = strlen (name) + 1;
- size_t password_size = strlen (password) + 1;
- size_t relay_size = relay_count * sizeof (*relays);
- size_t payload_size = name_size + password_size + relay_size;
-
- if (GNUNET_MAX_MESSAGE_SIZE < sizeof (*preq) + payload_size)
- return GNUNET_SYSERR;
-
- struct GNUNET_MQ_Envelope *
- env = GNUNET_MQ_msg_extra (preq, payload_size,
- GNUNET_MESSAGE_TYPE_SOCIAL_ZONE_ADD_PLACE);
- preq->expiration_time = GNUNET_htonll (expiration_time.abs_value_us);
- preq->ego_pub_key = ego->pub_key;
- preq->place_pub_key = *place_pub_key;
- preq->origin = *origin;
- preq->relay_count = htonl (relay_count);
-
- char *p = (char *) &preq[1];
- GNUNET_memcpy (p, name, name_size);
- p += name_size;
- GNUNET_memcpy (p, password, password_size);
- p += password_size;
- GNUNET_memcpy (p, relays, relay_size);
-
- struct ZoneAddPlaceHandle * add_plc = GNUNET_malloc (sizeof (*add_plc));
- add_plc->result_cb = result_cb;
- add_plc->result_cls = result_cls;
-
- preq->op_id = GNUNET_htonll (GNUNET_OP_add (app->op,
- op_recv_zone_add_place_result,
- add_plc, NULL));
-
- GNUNET_MQ_send (app->mq, env);
- return GNUNET_OK;
- }
-
-
- static void
- op_recv_zone_add_nym_result (void *cls, int64_t result,
- const void *err_msg, uint16_t err_msg_size)
- {
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "Received zone add nym result: %" PRId64 ".\n", result);
-
- struct ZoneAddNymHandle *add_nym = cls;
- if (NULL != add_nym->result_cb)
- add_nym->result_cb (add_nym->result_cls, result, err_msg, err_msg_size);
-
- GNUNET_free (add_nym);
- }
-
-
- /**
- * Add nym to the GNS zone of @e ego.
- *
- * @param cfg
- * Configuration.
- * @param ego
- * Ego.
- * @param name
- * The name for the PKEY record to put in the zone.
- * @param nym_pub_key
- * Public key of nym to add.
- * @param expiration_time
- * Expiration time of the record, use 0 to remove the record.
- * @param result_cb
- * Function called with the result of the operation.
- * @param result_cls
- * Closure for @a result_cb
- *
- * @return #GNUNET_OK if the request was sent,
- * #GNUNET_SYSERR on error, e.g. the name is too long.
- */
- int
- GNUNET_SOCIAL_zone_add_nym (const struct GNUNET_SOCIAL_App *app,
- const struct GNUNET_SOCIAL_Ego *ego,
- const char *name,
- const struct GNUNET_CRYPTO_EcdsaPublicKey *nym_pub_key,
- struct GNUNET_TIME_Absolute expiration_time,
- GNUNET_ResultCallback result_cb,
- void *result_cls)
- {
- struct ZoneAddNymRequest *nreq;
-
- size_t name_size = strlen (name) + 1;
- if (GNUNET_MAX_MESSAGE_SIZE < sizeof (*nreq) + name_size)
- return GNUNET_SYSERR;
-
- struct GNUNET_MQ_Envelope *
- env = GNUNET_MQ_msg_extra (nreq, name_size,
- GNUNET_MESSAGE_TYPE_SOCIAL_ZONE_ADD_NYM);
- nreq->expiration_time = GNUNET_htonll (expiration_time.abs_value_us);
- nreq->ego_pub_key = ego->pub_key;
- nreq->nym_pub_key = *nym_pub_key;
- GNUNET_memcpy (&nreq[1], name, name_size);
-
- struct ZoneAddNymHandle *add_nym = GNUNET_malloc (sizeof (*add_nym));
- add_nym->result_cb = result_cb;
- add_nym->result_cls = result_cls;
-
- nreq->op_id = GNUNET_htonll (GNUNET_OP_add (app->op,
- op_recv_zone_add_nym_result,
- add_nym, NULL));
-
- GNUNET_MQ_send (app->mq, env);
- return GNUNET_OK;
- }
-
-
- /*** APP ***/
-
-
- static void
- app_connect (struct GNUNET_SOCIAL_App *app);
-
-
- static void
- app_reconnect (void *cls)
- {
- app_connect (cls);
- }
-
-
- /**
- * App client disconnected from service.
- *
- * Reconnect after backoff period.
- */
- static void
- app_disconnected (void *cls, enum GNUNET_MQ_Error error)
- {
- struct GNUNET_SOCIAL_App *app = cls;
-
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "App client disconnected (%d), re-connecting\n",
- (int) error);
- if (NULL != app->mq)
- {
- GNUNET_MQ_destroy (app->mq);
- app->mq = NULL;
- }
-
- app->reconnect_task = GNUNET_SCHEDULER_add_delayed (app->reconnect_delay,
- app_reconnect,
- app);
- app->reconnect_delay = GNUNET_TIME_STD_BACKOFF (app->reconnect_delay);
- }
-
-
- static void
- app_connect (struct GNUNET_SOCIAL_App *app)
- {
- struct GNUNET_MQ_MessageHandler handlers[] = {
- GNUNET_MQ_hd_var_size (app_ego,
- GNUNET_MESSAGE_TYPE_SOCIAL_APP_EGO,
- struct AppEgoMessage,
- app),
- GNUNET_MQ_hd_fixed_size (app_ego_end,
- GNUNET_MESSAGE_TYPE_SOCIAL_APP_EGO_END,
- struct GNUNET_MessageHeader,
- app),
- GNUNET_MQ_hd_var_size (app_place,
- GNUNET_MESSAGE_TYPE_SOCIAL_APP_PLACE,
- struct AppPlaceMessage,
- app),
- GNUNET_MQ_hd_fixed_size (app_place_end,
- GNUNET_MESSAGE_TYPE_SOCIAL_APP_PLACE_END,
- struct GNUNET_MessageHeader,
- app),
- GNUNET_MQ_hd_var_size (app_result,
- GNUNET_MESSAGE_TYPE_PSYC_RESULT_CODE,
- struct GNUNET_OperationResultMessage,
- app),
- GNUNET_MQ_handler_end ()
- };
-
- app->mq = GNUNET_CLIENT_connect (app->cfg, "social",
- handlers, app_disconnected, app);
- GNUNET_assert (NULL != app->mq);
- GNUNET_MQ_send_copy (app->mq, app->connect_env);
- }
-
-
- /**
- * Connect application to the social service.
- *
- * The @host_place_cb and @guest_place_cb functions are
- * initially called for each entered places,
- * then later each time a new place is entered with the current application ID.
- *
- * @param cfg
- * Configuration.
- * @param id
- * Application ID.
- * @param ego_cb
- * Function to notify about an available ego.
- * @param host_cb
- * Function to notify about a place entered as host.
- * @param guest_cb
- * Function to notify about a place entered as guest.
- * @param cls
- * Closure for the callbacks.
- *
- * @return Handle that can be used to stop listening.
- */
- struct GNUNET_SOCIAL_App *
- GNUNET_SOCIAL_app_connect (const struct GNUNET_CONFIGURATION_Handle *cfg,
- const char *id,
- GNUNET_SOCIAL_AppEgoCallback ego_cb,
- GNUNET_SOCIAL_AppHostPlaceCallback host_cb,
- GNUNET_SOCIAL_AppGuestPlaceCallback guest_cb,
- GNUNET_SOCIAL_AppConnectedCallback connected_cb,
- void *cls)
- {
- uint16_t app_id_size = strnlen (id, GNUNET_SOCIAL_APP_MAX_ID_SIZE);
- if (GNUNET_SOCIAL_APP_MAX_ID_SIZE == app_id_size)
- return NULL;
- app_id_size++;
-
- struct GNUNET_SOCIAL_App *app = GNUNET_malloc (sizeof *app);
- app->cfg = cfg;
- app->ego_cb = ego_cb;
- app->host_cb = host_cb;
- app->guest_cb = guest_cb;
- app->connected_cb = connected_cb;
- app->cb_cls = cls;
- app->egos = GNUNET_CONTAINER_multihashmap_create (1, GNUNET_NO);
- app->op = GNUNET_OP_create ();
- app->id = GNUNET_malloc (app_id_size);
- GNUNET_memcpy (app->id, id, app_id_size);
-
- struct AppConnectRequest *creq;
- app->connect_env = GNUNET_MQ_msg_extra (creq, app_id_size,
- GNUNET_MESSAGE_TYPE_SOCIAL_APP_CONNECT);
- GNUNET_memcpy (&creq[1], app->id, app_id_size);
-
- app_connect (app);
- return app;
- }
-
-
- static void
- app_cleanup (struct GNUNET_SOCIAL_App *app)
- {
- if (NULL != app->mq)
- {
- GNUNET_MQ_destroy (app->mq);
- app->mq = NULL;
- }
- if (NULL != app->disconnect_cb)
- {
- app->disconnect_cb (app->disconnect_cls);
- app->disconnect_cb = NULL;
- }
- GNUNET_free (app);
- }
-
- /**
- * Disconnect application.
- *
- * @param app
- * Application handle.
- * @param disconnect_cb
- * Disconnect callback.
- * @param disconnect_cls
- * Disconnect closure.
- */
- void
- GNUNET_SOCIAL_app_disconnect (struct GNUNET_SOCIAL_App *app,
- GNUNET_ContinuationCallback disconnect_cb,
- void *disconnect_cls)
- {
- if (NULL == app) return;
-
- app->disconnect_cb = disconnect_cb;
- app->disconnect_cls = disconnect_cls;
-
- if (NULL != app->mq)
- {
- struct GNUNET_MQ_Envelope *env = GNUNET_MQ_get_last_envelope (app->mq);
- if (NULL != env)
- {
- GNUNET_MQ_notify_sent (env, (GNUNET_SCHEDULER_TaskCallback) app_cleanup, app);
- }
- else
- {
- app_cleanup (app);
- }
- }
- else
- {
- app_cleanup (app);
- }
- }
-
-
- /**
- * Detach application from a place.
- *
- * Removes the place from the entered places list for this application.
- * Note: this does not disconnect from the place.
- *
- * @see GNUNET_SOCIAL_host_disconnect() and GNUNET_SOCIAL_guest_disconnect()
- *
- * @param app
- * Application.
- * @param plc
- * Place.
- */
- void
- GNUNET_SOCIAL_app_detach (struct GNUNET_SOCIAL_App *app,
- struct GNUNET_SOCIAL_Place *plc)
- {
- struct AppDetachRequest *dreq;
- struct GNUNET_MQ_Envelope *
- env = GNUNET_MQ_msg (dreq, GNUNET_MESSAGE_TYPE_SOCIAL_APP_DETACH);
- dreq->place_pub_key = plc->pub_key;
- dreq->ego_pub_key = plc->ego_pub_key;
-
- GNUNET_MQ_send (app->mq, env);
- }
-
-
- /* end of social_api.c */
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