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-rw-r--r--src/psycstore/gnunet-service-psycstore.c1049
1 files changed, 1049 insertions, 0 deletions
diff --git a/src/psycstore/gnunet-service-psycstore.c b/src/psycstore/gnunet-service-psycstore.c
new file mode 100644
index 0000000..9aebd3e
--- /dev/null
+++ b/src/psycstore/gnunet-service-psycstore.c
@@ -0,0 +1,1049 @@
+/**
+ * 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
+ */
+
+/**
+ * @file psycstore/gnunet-service-psycstore.c
+ * @brief PSYCstore service
+ * @author Gabor X Toth
+ * @author Christian Grothoff
+ */
+
+#include <inttypes.h>
+
+#include "platform.h"
+#include "gnunet_util_lib.h"
+#include "gnunet_constants.h"
+#include "gnunet_protocols.h"
+#include "gnunet_statistics_service.h"
+#include "gnunet_psyc_util_lib.h"
+#include "gnunet_psycstore_service.h"
+#include "gnunet_psycstore_plugin.h"
+#include "psycstore.h"
+
+
+/**
+ * Handle to our current configuration.
+ */
+static const struct GNUNET_CONFIGURATION_Handle *cfg;
+
+/**
+ * Service handle.
+ */
+static struct GNUNET_SERVICE_Handle *service;
+
+/**
+ * Handle to the statistics service.
+ */
+static struct GNUNET_STATISTICS_Handle *stats;
+
+/**
+ * Database handle
+ */
+static struct GNUNET_PSYCSTORE_PluginFunctions *db;
+
+/**
+ * Name of the database plugin
+ */
+static char *db_lib_name;
+
+
+/**
+ * Task run during shutdown.
+ *
+ * @param cls unused
+ */
+static void
+shutdown_task (void *cls)
+{
+ if (NULL != stats)
+ {
+ GNUNET_STATISTICS_destroy (stats, GNUNET_NO);
+ stats = NULL;
+ }
+ GNUNET_break (NULL == GNUNET_PLUGIN_unload (db_lib_name, db));
+ GNUNET_free (db_lib_name);
+ db_lib_name = NULL;
+}
+
+
+/**
+ * Send a result code back to the client.
+ *
+ * @param client
+ * Client that should receive the result code.
+ * @param result_code
+ * Code to transmit.
+ * @param op_id
+ * Operation ID in network byte order.
+ * @param err_msg
+ * Error message to include (or NULL for none).
+ */
+static void
+send_result_code (struct GNUNET_SERVICE_Client *client,
+ uint64_t op_id,
+ int64_t result_code,
+ const char *err_msg)
+{
+ struct OperationResult *res;
+ size_t err_size = 0;
+
+ if (NULL != err_msg)
+ err_size = strnlen (err_msg,
+ GNUNET_MAX_MESSAGE_SIZE - sizeof (*res) - 1) + 1;
+ struct GNUNET_MQ_Envelope *
+ env = GNUNET_MQ_msg_extra (res, err_size,
+ GNUNET_MESSAGE_TYPE_PSYCSTORE_RESULT_CODE);
+ res->result_code = GNUNET_htonll (result_code - INT64_MIN);
+ res->op_id = op_id;
+ if (0 < err_size)
+ {
+ GNUNET_memcpy (&res[1], err_msg, err_size);
+ ((char *) &res[1])[err_size - 1] = '\0';
+ }
+
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Sending result to client: %" PRId64 " (%s)\n",
+ result_code, err_msg);
+ GNUNET_MQ_send (GNUNET_SERVICE_client_get_mq (client), env);
+}
+
+
+enum
+{
+ MEMBERSHIP_TEST_NOT_NEEDED = 0,
+ MEMBERSHIP_TEST_NEEDED = 1,
+ MEMBERSHIP_TEST_DONE = 2,
+} MessageMembershipTest;
+
+
+struct SendClosure
+{
+ struct GNUNET_SERVICE_Client *client;
+
+ /**
+ * Channel's public key.
+ */
+ struct GNUNET_CRYPTO_EddsaPublicKey channel_key;
+
+ /**
+ * Slave's public key.
+ */
+ struct GNUNET_CRYPTO_EcdsaPublicKey slave_key;
+
+ /**
+ * Operation ID.
+ */
+ uint64_t op_id;
+
+ /**
+ * Membership test result.
+ */
+ int membership_test_result;
+
+ /**
+ * Do membership test with @a slave_key before returning fragment?
+ * @see enum MessageMembershipTest
+ */
+ uint8_t membership_test;
+};
+
+
+static int
+send_fragment (void *cls, struct GNUNET_MULTICAST_MessageHeader *msg,
+ enum GNUNET_PSYCSTORE_MessageFlags flags)
+{
+ struct SendClosure *sc = cls;
+ struct FragmentResult *res;
+
+ if (MEMBERSHIP_TEST_NEEDED == sc->membership_test)
+ {
+ sc->membership_test = MEMBERSHIP_TEST_DONE;
+ sc->membership_test_result
+ = db->membership_test (db->cls, &sc->channel_key, &sc->slave_key,
+ GNUNET_ntohll (msg->message_id));
+ switch (sc->membership_test_result)
+ {
+ case GNUNET_YES:
+ break;
+
+ case GNUNET_NO:
+ case GNUNET_SYSERR:
+ return GNUNET_NO;
+ }
+ }
+
+ size_t msg_size = ntohs (msg->header.size);
+
+ struct GNUNET_MQ_Envelope *
+ env = GNUNET_MQ_msg_extra (res, msg_size,
+ GNUNET_MESSAGE_TYPE_PSYCSTORE_RESULT_FRAGMENT);
+ res->op_id = sc->op_id;
+ res->psycstore_flags = htonl (flags);
+ GNUNET_memcpy (&res[1], msg, msg_size);
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Sending fragment %llu to client\n",
+ (unsigned long long) GNUNET_ntohll (msg->fragment_id));
+ GNUNET_free (msg);
+
+ GNUNET_MQ_send (GNUNET_SERVICE_client_get_mq (sc->client), env);
+ return GNUNET_YES;
+}
+
+
+static int
+send_state_var (void *cls, const char *name,
+ const void *value, uint32_t value_size)
+{
+ struct SendClosure *sc = cls;
+ struct StateResult *res;
+ size_t name_size = strlen (name) + 1;
+
+ /** @todo FIXME: split up value into 64k chunks */
+
+ struct GNUNET_MQ_Envelope *
+ env = GNUNET_MQ_msg_extra (res, name_size + value_size,
+ GNUNET_MESSAGE_TYPE_PSYCSTORE_RESULT_STATE);
+ res->op_id = sc->op_id;
+ res->name_size = htons (name_size);
+ GNUNET_memcpy (&res[1], name, name_size);
+ GNUNET_memcpy ((char *) &res[1] + name_size, value, value_size);
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Sending state variable %s to client\n", name);
+
+ GNUNET_MQ_send (GNUNET_SERVICE_client_get_mq (sc->client), env);
+ return GNUNET_OK;
+}
+
+
+static void
+handle_client_membership_store (void *cls,
+ const struct MembershipStoreRequest *req)
+{
+ struct GNUNET_SERVICE_Client *client = cls;
+
+ int ret = db->membership_store (db->cls, &req->channel_key, &req->slave_key,
+ req->did_join,
+ GNUNET_ntohll (req->announced_at),
+ GNUNET_ntohll (req->effective_since),
+ GNUNET_ntohll (req->group_generation));
+
+ if (ret != GNUNET_OK)
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ _("Failed to store membership information!\n"));
+
+ send_result_code (client, req->op_id, ret, NULL);
+ GNUNET_SERVICE_client_continue (client);
+}
+
+
+static void
+handle_client_membership_test (void *cls,
+ const struct MembershipTestRequest *req)
+{
+ struct GNUNET_SERVICE_Client *client = cls;
+
+ int ret = db->membership_test (db->cls, &req->channel_key, &req->slave_key,
+ GNUNET_ntohll (req->message_id));
+ switch (ret)
+ {
+ case GNUNET_YES:
+ case GNUNET_NO:
+ break;
+ default:
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ _("Failed to test membership!\n"));
+ }
+
+ send_result_code (client, req->op_id, ret, NULL);
+ GNUNET_SERVICE_client_continue (client);
+}
+
+
+static int
+check_client_fragment_store (void *cls,
+ const struct FragmentStoreRequest *req)
+{
+ return GNUNET_OK;
+}
+
+
+static void
+handle_client_fragment_store (void *cls,
+ const struct FragmentStoreRequest *req)
+{
+ struct GNUNET_SERVICE_Client *client = cls;
+
+ const struct GNUNET_MessageHeader *
+ msg = GNUNET_MQ_extract_nested_mh (req);
+ if (NULL == msg
+ || ntohs (msg->size) < sizeof (struct GNUNET_MULTICAST_MessageHeader))
+ {
+ GNUNET_break (0);
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ _("Dropping invalid fragment\n"));
+ GNUNET_SERVICE_client_drop (client);
+ return;
+ }
+
+ int ret = db->fragment_store (db->cls, &req->channel_key,
+ (const struct GNUNET_MULTICAST_MessageHeader *)
+ msg, ntohl (req->psycstore_flags));
+
+ if (ret != GNUNET_OK)
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ _("Failed to store fragment\n"));
+
+ send_result_code (client, req->op_id, ret, NULL);
+ GNUNET_SERVICE_client_continue (client);
+}
+
+
+static void
+handle_client_fragment_get (void *cls,
+ const struct FragmentGetRequest *req)
+{
+ struct GNUNET_SERVICE_Client *client = cls;
+
+ struct SendClosure
+ sc = { .op_id = req->op_id,
+ .client = client,
+ .channel_key = req->channel_key,
+ .slave_key = req->slave_key,
+ .membership_test = req->do_membership_test };
+
+ int64_t ret;
+ uint64_t ret_frags = 0;
+ uint64_t first_fragment_id = GNUNET_ntohll (req->first_fragment_id);
+ uint64_t last_fragment_id = GNUNET_ntohll (req->last_fragment_id);
+ uint64_t limit = GNUNET_ntohll (req->fragment_limit);
+
+ if (0 == limit)
+ ret = db->fragment_get (db->cls, &req->channel_key,
+ first_fragment_id, last_fragment_id,
+ &ret_frags, send_fragment, &sc);
+ else
+ ret = db->fragment_get_latest (db->cls, &req->channel_key, limit,
+ &ret_frags, send_fragment, &sc);
+
+ switch (ret)
+ {
+ case GNUNET_YES:
+ case GNUNET_NO:
+ if (MEMBERSHIP_TEST_DONE == sc.membership_test)
+ {
+ switch (sc.membership_test_result)
+ {
+ case GNUNET_YES:
+ break;
+
+ case GNUNET_NO:
+ ret = GNUNET_PSYCSTORE_MEMBERSHIP_TEST_FAILED;
+ break;
+
+ case GNUNET_SYSERR:
+ ret = GNUNET_SYSERR;
+ break;
+ }
+ }
+ break;
+ default:
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ _("Failed to get fragment!\n"));
+ }
+ send_result_code (client, req->op_id, (ret < 0) ? ret : ret_frags, NULL);
+ GNUNET_SERVICE_client_continue (client);
+}
+
+
+static int
+check_client_message_get (void *cls,
+ const struct MessageGetRequest *req)
+{
+ return GNUNET_OK;
+}
+
+
+static void
+handle_client_message_get (void *cls,
+ const struct MessageGetRequest *req)
+{
+ struct GNUNET_SERVICE_Client *client = cls;
+
+ uint16_t size = ntohs (req->header.size);
+ const char *method_prefix = (const char *) &req[1];
+
+ if (size < sizeof (*req) + 1
+ || '\0' != method_prefix[size - sizeof (*req) - 1])
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ "Message get: invalid method prefix. size: %u < %u?\n",
+ size,
+ (unsigned int) (sizeof (*req) + 1));
+ GNUNET_break (0);
+ GNUNET_SERVICE_client_drop (client);
+ return;
+ }
+
+ struct SendClosure
+ sc = { .op_id = req->op_id,
+ .client = client,
+ .channel_key = req->channel_key,
+ .slave_key = req->slave_key,
+ .membership_test = req->do_membership_test };
+
+ int64_t ret;
+ uint64_t ret_frags = 0;
+ uint64_t first_message_id = GNUNET_ntohll (req->first_message_id);
+ uint64_t last_message_id = GNUNET_ntohll (req->last_message_id);
+ uint64_t msg_limit = GNUNET_ntohll (req->message_limit);
+ uint64_t frag_limit = GNUNET_ntohll (req->fragment_limit);
+
+ /** @todo method_prefix */
+ if (0 == msg_limit)
+ ret = db->message_get (db->cls, &req->channel_key,
+ first_message_id, last_message_id, frag_limit,
+ &ret_frags, send_fragment, &sc);
+ else
+ ret = db->message_get_latest (db->cls, &req->channel_key, msg_limit,
+ &ret_frags, send_fragment, &sc);
+
+ switch (ret)
+ {
+ case GNUNET_YES:
+ case GNUNET_NO:
+ break;
+ default:
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ _("Failed to get message!\n"));
+ }
+
+ send_result_code (client, req->op_id, (ret < 0) ? ret : ret_frags, NULL);
+ GNUNET_SERVICE_client_continue (client);
+}
+
+
+static void
+handle_client_message_get_fragment (void *cls,
+ const struct MessageGetFragmentRequest *req)
+{
+ struct GNUNET_SERVICE_Client *client = cls;
+
+ struct SendClosure
+ sc = { .op_id = req->op_id, .client = client,
+ .channel_key = req->channel_key, .slave_key = req->slave_key,
+ .membership_test = req->do_membership_test };
+
+ int ret = db->message_get_fragment (db->cls, &req->channel_key,
+ GNUNET_ntohll (req->message_id),
+ GNUNET_ntohll (req->fragment_offset),
+ &send_fragment, &sc);
+ switch (ret)
+ {
+ case GNUNET_YES:
+ case GNUNET_NO:
+ break;
+ default:
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ _("Failed to get message fragment!\n"));
+ }
+
+ send_result_code (client, req->op_id, ret, NULL);
+ GNUNET_SERVICE_client_continue (client);
+}
+
+
+static void
+handle_client_counters_get (void *cls,
+ const struct OperationRequest *req)
+{
+ struct GNUNET_SERVICE_Client *client = cls;
+
+ struct CountersResult *res;
+ struct GNUNET_MQ_Envelope *
+ env = GNUNET_MQ_msg (res, GNUNET_MESSAGE_TYPE_PSYCSTORE_RESULT_COUNTERS);
+
+ int ret = db->counters_message_get (db->cls, &req->channel_key,
+ &res->max_fragment_id, &res->max_message_id,
+ &res->max_group_generation);
+ switch (ret)
+ {
+ case GNUNET_OK:
+ ret = db->counters_state_get (db->cls, &req->channel_key,
+ &res->max_state_message_id);
+ case GNUNET_NO:
+ break;
+ default:
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ _("Failed to get master counters!\n"));
+ }
+
+ res->result_code = htonl (ret);
+ res->op_id = req->op_id;
+ res->max_fragment_id = GNUNET_htonll (res->max_fragment_id);
+ res->max_message_id = GNUNET_htonll (res->max_message_id);
+ res->max_group_generation = GNUNET_htonll (res->max_group_generation);
+ res->max_state_message_id = GNUNET_htonll (res->max_state_message_id);
+
+ GNUNET_MQ_send (GNUNET_SERVICE_client_get_mq (client), env);
+ GNUNET_SERVICE_client_continue (client);
+}
+
+
+struct StateModifyClosure
+{
+ const struct GNUNET_CRYPTO_EddsaPublicKey channel_key;
+ struct GNUNET_PSYC_ReceiveHandle *recv;
+ enum GNUNET_PSYC_MessageState msg_state;
+ char mod_oper;
+ char *mod_name;
+ char *mod_value;
+ uint32_t mod_value_size;
+ uint32_t mod_value_remaining;
+};
+
+
+static void
+recv_state_message_part (void *cls,
+ const struct GNUNET_PSYC_MessageHeader *msg,
+ const struct GNUNET_MessageHeader *pmsg)
+{
+ struct StateModifyClosure *scls = cls;
+ uint16_t psize;
+
+ if (NULL == msg)
+ { // FIXME: error on unknown message
+ return;
+ }
+
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "recv_state_message_part() message_id: %" PRIu64
+ ", fragment_offset: %" PRIu64 ", flags: %u\n",
+ GNUNET_ntohll (msg->message_id),
+ GNUNET_ntohll (msg->fragment_offset),
+ ntohl (msg->flags));
+
+ if (NULL == pmsg)
+ {
+ scls->msg_state = GNUNET_PSYC_MESSAGE_STATE_ERROR;
+ return;
+ }
+
+ switch (ntohs (pmsg->type))
+ {
+ case GNUNET_MESSAGE_TYPE_PSYC_MESSAGE_METHOD:
+ {
+ scls->msg_state = GNUNET_PSYC_MESSAGE_STATE_METHOD;
+ break;
+ }
+
+ case GNUNET_MESSAGE_TYPE_PSYC_MESSAGE_MODIFIER:
+ {
+ struct GNUNET_PSYC_MessageModifier *
+ pmod = (struct GNUNET_PSYC_MessageModifier *) pmsg;
+ psize = ntohs (pmod->header.size);
+ uint16_t name_size = ntohs (pmod->name_size);
+ uint32_t value_size = ntohl (pmod->value_size);
+
+ const char *name = (const char *) &pmod[1];
+ const void *value = name + name_size;
+
+ if (GNUNET_PSYC_OP_SET != pmod->oper)
+ { // Apply non-transient operation.
+ if (psize == sizeof (*pmod) + name_size + value_size)
+ {
+ db->state_modify_op (db->cls, &scls->channel_key,
+ pmod->oper, name, value, value_size);
+ }
+ else
+ {
+ scls->mod_oper = pmod->oper;
+ scls->mod_name = GNUNET_malloc (name_size);
+ GNUNET_memcpy (scls->mod_name, name, name_size);
+
+ scls->mod_value_size = value_size;
+ scls->mod_value = GNUNET_malloc (scls->mod_value_size);
+ scls->mod_value_remaining
+ = scls->mod_value_size - (psize - sizeof (*pmod) - name_size);
+ GNUNET_memcpy (scls->mod_value, value, value_size - scls->mod_value_remaining);
+ }
+ }
+ scls->msg_state = GNUNET_PSYC_MESSAGE_STATE_MODIFIER;
+ break;
+ }
+
+ case GNUNET_MESSAGE_TYPE_PSYC_MESSAGE_MOD_CONT:
+ if (GNUNET_PSYC_OP_SET != scls->mod_oper)
+ {
+ if (scls->mod_value_remaining == 0)
+ {
+ GNUNET_break_op (0);
+ scls->msg_state = GNUNET_PSYC_MESSAGE_STATE_ERROR;
+ }
+ psize = ntohs (pmsg->size);
+ GNUNET_memcpy (scls->mod_value + (scls->mod_value_size - scls->mod_value_remaining),
+ &pmsg[1], psize - sizeof (*pmsg));
+ scls->mod_value_remaining -= psize - sizeof (*pmsg);
+ if (0 == scls->mod_value_remaining)
+ {
+ db->state_modify_op (db->cls, &scls->channel_key,
+ scls->mod_oper, scls->mod_name,
+ scls->mod_value, scls->mod_value_size);
+ GNUNET_free (scls->mod_name);
+ GNUNET_free (scls->mod_value);
+ scls->mod_oper = 0;
+ scls->mod_name = NULL;
+ scls->mod_value = NULL;
+ scls->mod_value_size = 0;
+ }
+ }
+ scls->msg_state = GNUNET_PSYC_MESSAGE_STATE_MOD_CONT;
+ break;
+
+ case GNUNET_MESSAGE_TYPE_PSYC_MESSAGE_DATA:
+ scls->msg_state = GNUNET_PSYC_MESSAGE_STATE_DATA;
+ break;
+
+ case GNUNET_MESSAGE_TYPE_PSYC_MESSAGE_END:
+ scls->msg_state = GNUNET_PSYC_MESSAGE_STATE_END;
+ break;
+
+ default:
+ scls->msg_state = GNUNET_PSYC_MESSAGE_STATE_ERROR;
+ }
+}
+
+
+static int
+recv_state_fragment (void *cls, struct GNUNET_MULTICAST_MessageHeader *msg,
+ enum GNUNET_PSYCSTORE_MessageFlags flags)
+{
+ struct StateModifyClosure *scls = cls;
+
+ if (NULL == scls->recv)
+ {
+ scls->recv = GNUNET_PSYC_receive_create (NULL, recv_state_message_part,
+ scls);
+ }
+
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "recv_state_fragment: %" PRIu64 "\n", GNUNET_ntohll (msg->fragment_id));
+
+ struct GNUNET_PSYC_MessageHeader *
+ pmsg = GNUNET_PSYC_message_header_create (msg, flags);
+ GNUNET_PSYC_receive_message (scls->recv, pmsg);
+ GNUNET_free (pmsg);
+
+ return GNUNET_YES;
+}
+
+
+static void
+handle_client_state_modify (void *cls,
+ const struct StateModifyRequest *req)
+{
+ struct GNUNET_SERVICE_Client *client = cls;
+
+ uint64_t message_id = GNUNET_ntohll (req->message_id);
+ uint64_t state_delta = GNUNET_ntohll (req->state_delta);
+ uint64_t ret_frags = 0;
+ struct StateModifyClosure
+ scls = { .channel_key = req->channel_key };
+
+ int ret = db->state_modify_begin (db->cls, &req->channel_key,
+ message_id, state_delta);
+
+ if (GNUNET_OK != ret)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
+ _("Failed to begin modifying state: %d\n"), ret);
+ }
+ else
+ {
+ ret = db->message_get (db->cls, &req->channel_key,
+ message_id, message_id, 0,
+ &ret_frags, recv_state_fragment, &scls);
+ if (GNUNET_OK != ret)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ _("Failed to modify state: %d\n"), ret);
+ GNUNET_break (0);
+ }
+ else
+ {
+ if (GNUNET_OK != db->state_modify_end (db->cls, &req->channel_key, message_id))
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ _("Failed to end modifying state!\n"));
+ GNUNET_break (0);
+ }
+ }
+ if (NULL != scls.recv)
+ {
+ GNUNET_PSYC_receive_destroy (scls.recv);
+ }
+ }
+
+ send_result_code (client, req->op_id, ret, NULL);
+ GNUNET_SERVICE_client_continue (client);
+}
+
+
+static int
+check_client_state_sync (void *cls,
+ const struct StateSyncRequest *req)
+{
+ return GNUNET_OK;
+}
+
+
+/** @todo FIXME: stop processing further state sync messages after an error */
+static void
+handle_client_state_sync (void *cls,
+ const struct StateSyncRequest *req)
+{
+ struct GNUNET_SERVICE_Client *client = cls;
+
+ int ret = GNUNET_SYSERR;
+ const char *name = (const char *) &req[1];
+ uint16_t name_size = ntohs (req->name_size);
+
+ if (name_size <= 2 || '\0' != name[name_size - 1])
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ _("Tried to set invalid state variable name!\n"));
+ GNUNET_break_op (0);
+ }
+ else
+ {
+ ret = GNUNET_OK;
+
+ if (req->flags & STATE_OP_FIRST)
+ {
+ ret = db->state_sync_begin (db->cls, &req->channel_key);
+ }
+ if (ret != GNUNET_OK)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ _("Failed to begin synchronizing state!\n"));
+ }
+ else
+ {
+ ret = db->state_sync_assign (db->cls, &req->channel_key, name,
+ name + ntohs (req->name_size),
+ ntohs (req->header.size) - sizeof (*req)
+ - ntohs (req->name_size));
+ }
+
+ if (GNUNET_OK == ret && req->flags & STATE_OP_LAST)
+ {
+ ret = db->state_sync_end (db->cls, &req->channel_key,
+ GNUNET_ntohll (req->max_state_message_id),
+ GNUNET_ntohll (req->state_hash_message_id));
+ if (ret != GNUNET_OK)
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ _("Failed to end synchronizing state!\n"));
+ }
+ }
+ send_result_code (client, req->op_id, ret, NULL);
+ GNUNET_SERVICE_client_continue (client);
+}
+
+
+static void
+handle_client_state_reset (void *cls,
+ const struct OperationRequest *req)
+{
+ struct GNUNET_SERVICE_Client *client = cls;
+
+ int ret = db->state_reset (db->cls, &req->channel_key);
+
+ if (ret != GNUNET_OK)
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ _("Failed to reset state!\n"));
+
+ send_result_code (client, req->op_id, ret, NULL);
+ GNUNET_SERVICE_client_continue (client);
+}
+
+
+static void
+handle_client_state_hash_update (void *cls,
+ const struct StateHashUpdateRequest *req)
+{
+ struct GNUNET_SERVICE_Client *client = cls;
+
+ int ret = db->state_reset (db->cls, &req->channel_key);
+ if (ret != GNUNET_OK)
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ _("Failed to reset state!\n"));
+
+ send_result_code (client, req->op_id, ret, NULL);
+ GNUNET_SERVICE_client_continue (client);
+}
+
+
+static int
+check_client_state_get (void *cls,
+ const struct OperationRequest *req)
+{
+ return GNUNET_OK;
+}
+
+
+static void
+handle_client_state_get (void *cls,
+ const struct OperationRequest *req)
+{
+ struct GNUNET_SERVICE_Client *client = cls;
+
+ struct SendClosure sc = { .op_id = req->op_id, .client = client };
+ int64_t ret = GNUNET_SYSERR;
+ const char *name = (const char *) &req[1];
+ uint16_t name_size = ntohs (req->header.size) - sizeof (*req);
+
+ if (name_size <= 2 || '\0' != name[name_size - 1])
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ _("Tried to get invalid state variable name!\n"));
+ GNUNET_break (0);
+ }
+ else
+ {
+ ret = db->state_get (db->cls, &req->channel_key, name,
+ &send_state_var, &sc);
+ if (GNUNET_NO == ret && name_size >= 5) /* min: _a_b\0 */
+ {
+ char *p, *n = GNUNET_malloc (name_size);
+ GNUNET_memcpy (n, name, name_size);
+ while (&n[1] < (p = strrchr (n, '_')) && GNUNET_NO == ret)
+ {
+ *p = '\0';
+ ret = db->state_get (db->cls, &req->channel_key, n,
+ &send_state_var, &sc);
+ }
+ GNUNET_free (n);
+ }
+ }
+ switch (ret)
+ {
+ case GNUNET_OK:
+ case GNUNET_NO:
+ break;
+ default:
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ _("Failed to get state variable!\n"));
+ }
+
+ send_result_code (client, req->op_id, ret, NULL);
+ GNUNET_SERVICE_client_continue (client);
+}
+
+
+static int
+check_client_state_get_prefix (void *cls,
+ const struct OperationRequest *req)
+{
+ return GNUNET_OK;
+}
+
+
+static void
+handle_client_state_get_prefix (void *cls,
+ const struct OperationRequest *req)
+{
+ struct GNUNET_SERVICE_Client *client = cls;
+
+ struct SendClosure sc = { .op_id = req->op_id, .client = client };
+ int64_t ret = GNUNET_SYSERR;
+ const char *name = (const char *) &req[1];
+ uint16_t name_size = ntohs (req->header.size) - sizeof (*req);
+
+ if (name_size <= 1 || '\0' != name[name_size - 1])
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ _("Tried to get invalid state variable name!\n"));
+ GNUNET_break (0);
+ }
+ else
+ {
+ ret = db->state_get_prefix (db->cls, &req->channel_key, name,
+ &send_state_var, &sc);
+ }
+ switch (ret)
+ {
+ case GNUNET_OK:
+ case GNUNET_NO:
+ break;
+ default:
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ _("Failed to get state variable!\n"));
+ }
+
+ send_result_code (client, req->op_id, ret, NULL);
+ GNUNET_SERVICE_client_continue (client);
+}
+
+
+/**
+ * A new client connected.
+ *
+ * @param cls NULL
+ * @param client client to add
+ * @param mq message queue for @a client
+ * @return @a client
+ */
+static void *
+client_notify_connect (void *cls,
+ struct GNUNET_SERVICE_Client *client,
+ struct GNUNET_MQ_Handle *mq)
+{
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Client connected: %p\n", client);
+
+ return client;
+}
+
+
+/**
+ * Called whenever a client is disconnected.
+ * Frees our resources associated with that client.
+ *
+ * @param cls closure
+ * @param client identification of the client
+ * @param app_ctx must match @a client
+ */
+static void
+client_notify_disconnect (void *cls,
+ struct GNUNET_SERVICE_Client *client,
+ void *app_ctx)
+{
+}
+
+
+/**
+ * Initialize the PSYCstore service.
+ *
+ * @param cls Closure.
+ * @param server The initialized server.
+ * @param c Configuration to use.
+ */
+static void
+run (void *cls,
+ const struct GNUNET_CONFIGURATION_Handle *c,
+ struct GNUNET_SERVICE_Handle *svc)
+{
+ cfg = c;
+ service = svc;
+
+ /* Loading database plugin */
+ char *database;
+ if (GNUNET_OK !=
+ GNUNET_CONFIGURATION_get_value_string (cfg, "psycstore", "database",
+ &database))
+ {
+ GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR,
+ "psycstore",
+ "database");
+ }
+ else
+ {
+ GNUNET_asprintf (&db_lib_name,
+ "libgnunet_plugin_psycstore_%s",
+ database);
+ db = GNUNET_PLUGIN_load (db_lib_name, (void *) cfg);
+ GNUNET_free (database);
+ }
+ if (NULL == db)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ "Could not load database backend `%s'\n",
+ db_lib_name);
+ GNUNET_SCHEDULER_add_now (&shutdown_task, NULL);
+ return;
+ }
+
+ stats = GNUNET_STATISTICS_create ("psycstore", cfg);
+ GNUNET_SCHEDULER_add_shutdown (shutdown_task,
+ NULL);
+}
+
+/**
+ * Define "main" method using service macro.
+ */
+GNUNET_SERVICE_MAIN
+("psycstore",
+ GNUNET_SERVICE_OPTION_NONE,
+ run,
+ client_notify_connect,
+ client_notify_disconnect,
+ NULL,
+ GNUNET_MQ_hd_fixed_size (client_membership_store,
+ GNUNET_MESSAGE_TYPE_PSYCSTORE_MEMBERSHIP_STORE,
+ struct MembershipStoreRequest,
+ NULL),
+ GNUNET_MQ_hd_fixed_size (client_membership_test,
+ GNUNET_MESSAGE_TYPE_PSYCSTORE_MEMBERSHIP_TEST,
+ struct MembershipTestRequest,
+ NULL),
+ GNUNET_MQ_hd_var_size (client_fragment_store,
+ GNUNET_MESSAGE_TYPE_PSYCSTORE_FRAGMENT_STORE,
+ struct FragmentStoreRequest,
+ NULL),
+ GNUNET_MQ_hd_fixed_size (client_fragment_get,
+ GNUNET_MESSAGE_TYPE_PSYCSTORE_FRAGMENT_GET,
+ struct FragmentGetRequest,
+ NULL),
+ GNUNET_MQ_hd_var_size (client_message_get,
+ GNUNET_MESSAGE_TYPE_PSYCSTORE_MESSAGE_GET,
+ struct MessageGetRequest,
+ NULL),
+ GNUNET_MQ_hd_fixed_size (client_message_get_fragment,
+ GNUNET_MESSAGE_TYPE_PSYCSTORE_MESSAGE_GET_FRAGMENT,
+ struct MessageGetFragmentRequest,
+ NULL),
+ GNUNET_MQ_hd_fixed_size (client_counters_get,
+ GNUNET_MESSAGE_TYPE_PSYCSTORE_COUNTERS_GET,
+ struct OperationRequest,
+ NULL),
+ GNUNET_MQ_hd_fixed_size (client_state_modify,
+ GNUNET_MESSAGE_TYPE_PSYCSTORE_STATE_MODIFY,
+ struct StateModifyRequest,
+ NULL),
+ GNUNET_MQ_hd_var_size (client_state_sync,
+ GNUNET_MESSAGE_TYPE_PSYCSTORE_STATE_SYNC,
+ struct StateSyncRequest,
+ NULL),
+ GNUNET_MQ_hd_fixed_size (client_state_reset,
+ GNUNET_MESSAGE_TYPE_PSYCSTORE_STATE_RESET,
+ struct OperationRequest,
+ NULL),
+ GNUNET_MQ_hd_fixed_size (client_state_hash_update,
+ GNUNET_MESSAGE_TYPE_PSYCSTORE_STATE_HASH_UPDATE,
+ struct StateHashUpdateRequest,
+ NULL),
+ GNUNET_MQ_hd_var_size (client_state_get,
+ GNUNET_MESSAGE_TYPE_PSYCSTORE_STATE_GET,
+ struct OperationRequest,
+ NULL),
+ GNUNET_MQ_hd_var_size (client_state_get_prefix,
+ GNUNET_MESSAGE_TYPE_PSYCSTORE_STATE_GET_PREFIX,
+ struct OperationRequest,
+ NULL));
+
+/* end of gnunet-service-psycstore.c */