/*
* 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 .
SPDX-License-Identifier: AGPL3.0-or-later
*/
/**
* @author Gabor X Toth
*
* @file
* Social service; implements social interactions using the PSYC service.
*/
#include
#include
#include
#include
#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 */