--- /dev/null
+/*
+ This file is part of GNUnet
+ (C) 2009, 2010 Christian Grothoff (and other contributing authors)
+
+ GNUnet is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published
+ by the Free Software Foundation; either version 2, 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
+ General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with GNUnet; see the file COPYING. If not, write to the
+ Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA.
+ */
+
+#ifndef GNUNET_NSE_SERVICE_H_
+#define GNUNET_NSE_SERVICE_H_
+
+/**
+ * @file include/gnunet_nse_service.h
+ * @brief API to retrieve the current network size estimate,
+ * also to register for notifications whenever a new
+ * network size estimate is calculated.
+ *
+ * @author Nathan Evans
+ */
+
+#ifdef __cplusplus
+extern "C"
+{
+#if 0 /* keep Emacsens' auto-indent happy */
+}
+#endif
+#endif
+
+#include "gnunet_common.h"
+#include "gnunet_configuration_lib.h"
+#include "gnunet_scheduler_lib.h"
+
+/**
+ * Version of the network size estimation API.
+ */
+#define GNUNET_NSE_VERSION 0x00000000
+
+/**
+ * Interval for sending network size estimation flood requests.
+ * Number is in milliseconds.
+ * This needs to be a factor of the number milliseconds in
+ * a day, as the base time used is midnight each day offset
+ * by this amount.
+ *
+ * There are 86400000 milliseconds in a day.
+ */
+#define GNUNET_NSE_INTERVAL 3600000 /* Once per hour */
+
+/**
+ * Number of bits
+ */
+#define GNUNET_NSE_BITS
+
+/**
+ * Handle for the network size estimation service.
+ */
+struct GNUNET_NSE_Handle;
+
+
+/**
+ * Callback to call when network size estimate is updated.
+ *
+ * @param cls closure
+ * @param estimate the value of the current network size estimate
+ * @param std_dev standard deviation (rounded down to nearest integer)
+ * of the size estimation values seen
+ * @return GNUNET_OK to continue, GNUNET_SYSERR to abort iteration
+ */
+typedef int
+(*GNUNET_NSE_Callback) (void *cls, double estimate, double std_dev);
+
+/**
+ * Connect to the network size estimation service.
+ *
+ * @param cfg the configuration to use
+ * @param func funtion to call with network size estimate
+ * @param func_cls closure to pass for network size estimate callback
+ *
+ * @return handle to use
+ */
+struct GNUNET_NSE_Handle *
+GNUNET_NSE_connect (const struct GNUNET_CONFIGURATION_Handle *cfg,
+ GNUNET_NSE_Callback func, void *func_cls);
+
+
+/**
+ * Disconnect from network size estimation service
+ *
+ * @param h handle to destroy
+ *
+ */
+void
+GNUNET_NSE_disconnect (struct GNUNET_NSE_Handle *h);
+
+
+#if 0 /* keep Emacsens' auto-indent happy */
+{
+#endif
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* GNUNET_NSE_SERVICE_H_ */
--- /dev/null
+INCLUDES = -I$(top_srcdir)/src/include
+
+if MINGW
+ WINFLAGS = -Wl,--no-undefined -Wl,--export-all-symbols
+endif
+
+if USE_COVERAGE
+ AM_CFLAGS = --coverage -O0
+ XLIB = -lgcov
+endif
+
+
+lib_LTLIBRARIES = libgnunetnse.la
+
+libgnunetnse_la_SOURCES = \
+ nse_api.c nse.h
+libgnunetnse_la_LIBADD = \
+ $(top_builddir)/src/util/libgnunetutil.la \
+ $(GN_LIBINTL) $(XLIB)
+libgnunetnse_la_LDFLAGS = \
+ $(GN_LIB_LDFLAGS) $(WINFLAGS) \
+ -version-info 0:0:0
+
+
+bin_PROGRAMS = \
+ gnunet-service-nse
+
+# gnunet_nse_SOURCES = \
+# gnunet-nse.c
+# gnunet_nse_LDADD = \
+# $(top_builddir)/src/nse/libgnunetnse.la \
+# $(top_builddir)/src/util/libgnunetutil.la \
+# $(GN_LIBINTL)
+# gnunet_nse_DEPENDENCIES = \
+# libgnunetnse.la
+
+gnunet_service_nse_SOURCES = \
+ gnunet-service-nse.c
+gnunet_service_nse_LDADD = \
+ $(top_builddir)/src/nse/libgnunetnse.la \
+ $(top_builddir)/src/util/libgnunetutil.la \
+ $(top_builddir)/src/core/libgnunetcore.la \
+ $(GN_LIBINTL)
+gnunet_service_nse_DEPENDENCIES = \
+ libgnunetnse.la
+
+check_PROGRAMS = \
+ test_nse_api
+
+if ENABLE_TEST_RUN
+TESTS = $(check_PROGRAMS) $(check_SCRIPTS)
+endif
+
+test_nse_api_SOURCES = \
+ test_nse_api.c
+test_nse_api_LDADD = \
+ $(top_builddir)/src/nse/libgnunetnse.la \
+ $(top_builddir)/src/util/libgnunetutil.la
+
+
+EXTRA_DIST = \
+ test_nse_api_data.conf \
+ $(check_SCRIPTS)
+
+
--- /dev/null
+/*
+ This file is part of GNUnet.
+ (C) 2009, 2010, 2011 Christian Grothoff (and other contributing authors)
+
+ GNUnet is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published
+ by the Free Software Foundation; either version 3, 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
+ General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with GNUnet; see the file COPYING. If not, write to the
+ Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA.
+*/
+
+/**
+ * @file nse/gnunet-service-nse.c
+ * @brief network size estimation service
+ * @author Nathan Evans
+ *
+ * The purpose of this service is to estimate the size of the network.
+ * Given a specified interval, each peer hashes the most recent
+ * timestamp which is evenly divisible by that interval. This hash
+ * is compared in distance to the peer identity to choose an offset.
+ * The closer the peer identity to the hashed timestamp, the earlier
+ * the peer sends out a "nearest peer" message. The closest peer's
+ * message should thus be received before any others, which stops
+ * those peer from sending their messages at a later duration. So
+ * every peer should receive the same nearest peer message, and
+ * from this can calculate the expected number of peers in the
+ * network.
+ *
+ */
+#include "platform.h"
+#include "gnunet_client_lib.h"
+#include "gnunet_constants.h"
+#include "gnunet_container_lib.h"
+#include "gnunet_protocols.h"
+#include "gnunet_service_lib.h"
+#include "gnunet_server_lib.h"
+#include "gnunet_core_service.h"
+#include "gnunet_time_lib.h"
+#include "gnunet_nse_service.h"
+#include "nse.h"
+
+#define DEFAULT_HISTORY_SIZE 10
+
+#define DEFAULT_CORE_QUEUE_SIZE 32
+
+#define MILLISECONDS_PER_DAY 86400000
+
+/**
+ * Entry in the list of clients which
+ * should be notified upon a new network
+ * size estimate calculation.
+ */
+struct ClientListEntry
+{
+ /**
+ * Pointer to previous entry
+ */
+ struct ClientListEntry *prev;
+
+ /**
+ * Pointer to next entry
+ */
+ struct ClientListEntry *next;
+
+ /**
+ * Client to notify.
+ */
+ struct GNUNET_SERVER_Client *client;
+};
+
+/**
+ * Handle to our current configuration.
+ */
+static const struct GNUNET_CONFIGURATION_Handle *cfg;
+
+/**
+ * Handle to the core service.
+ */
+struct GNUNET_CORE_Handle *coreAPI;
+
+/**
+ * Copy of this peer's identity.
+ */
+static struct GNUNET_PeerIdentity my_identity;
+
+/**
+ * Head of global list of clients.
+ */
+static struct ClientListEntry *cle_head;
+
+/**
+ * Tail of global list of clients.
+ */
+static struct ClientListEntry *cle_tail;
+
+/**
+ * The current network size estimate.
+ */
+static double current_size_estimate;
+
+/**
+ * The standard deviation of the last
+ * DEFAULT_HISTORY_SIZE network size estimates.
+ */
+static double current_std_dev;
+
+/**
+ * Array of the last DEFAULT_HISTORY_SIZE
+ * network size estimates.
+ */
+//static double *size_estimates[DEFAULT_HISTORY_SIZE];
+
+/**
+ * Task scheduled to send flood message.
+ */
+static GNUNET_SCHEDULER_TaskIdentifier flood_task;
+
+/**
+ * Notification context, simplifies client broadcasts.
+ */
+static struct GNUNET_SERVER_NotificationContext *nc;
+
+/**
+ * The previous major time.
+ */
+struct GNUNET_TIME_Absolute previous_timestamp;
+
+/**
+ * The next major time.
+ */
+static struct GNUNET_TIME_Absolute next_timestamp;
+
+/**
+ * Base increment of time to add to send time.
+ */
+static struct GNUNET_TIME_Relative increment;
+
+/**
+ * The current network size estimate message.
+ */
+static struct GNUNET_NSE_ClientMessage current_estimate_message;
+
+/**
+ * Handler for START message from client, triggers an
+ * immediate current network estimate notification.
+ * Also, we remember the client for updates upon future
+ * estimate measurements.
+ *
+ * @param cls unused
+ * @param client who sent the message
+ * @param message the message received
+ */
+static void
+handle_start_message (void *cls,
+ struct GNUNET_SERVER_Client *client,
+ const struct GNUNET_MessageHeader *message)
+{
+ if ((ntohs (message->size) != sizeof(struct GNUNET_MessageHeader))
+ || (ntohs (message->type) != GNUNET_MESSAGE_TYPE_NSE_START))
+ return;
+
+#if DEBUG_NSE
+ GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, "NSE", "Received START message from client\n");
+#endif
+ GNUNET_SERVER_notification_context_add (nc, client);
+ GNUNET_SERVER_notification_context_unicast (nc, client,
+ ¤t_estimate_message.header,
+ GNUNET_NO);
+ GNUNET_SERVER_receive_done(client, GNUNET_OK);
+}
+
+/**
+ * Core handler for size estimate flooding messages.
+ *
+ * @param cls closure
+ * @param message message
+ * @param peer peer identity this notification is about
+ * @param atsi performance data
+ *
+ */
+static int
+handle_p2p_size_estimate (void *cls,
+ const struct GNUNET_PeerIdentity *peer,
+ const struct GNUNET_MessageHeader *message,
+ const struct GNUNET_TRANSPORT_ATS_Information
+ *atsi)
+{
+
+ return GNUNET_OK;
+}
+
+
+/**
+ * Send a flood message containing our peer's public key
+ * and the hashed current timestamp.
+ */
+static void
+send_flood_message (void *cls,
+ const struct GNUNET_SCHEDULER_TaskContext * tc)
+{
+ if ((tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN) != 0)
+ return;
+}
+
+/**
+ * A client disconnected. Remove it from the
+ * global DLL of clients.
+ *
+ * @param cls closure, NULL
+ * @param client identification of the client
+ */
+static void
+handle_client_disconnect (void *cls,
+ struct GNUNET_SERVER_Client* client)
+{
+ struct ClientListEntry *cle;
+
+ while (NULL != (cle = cle_head))
+ cle = cle->next;
+
+ if (cle != NULL)
+ {
+ GNUNET_SERVER_client_drop(cle->client);
+ GNUNET_CONTAINER_DLL_remove(cle_head,
+ cle_tail,
+ cle);
+ GNUNET_free(cle);
+ }
+ if (coreAPI != NULL)
+ {
+ GNUNET_CORE_disconnect(coreAPI);
+ coreAPI = NULL;
+ }
+}
+
+/**
+ * Task run during shutdown.
+ *
+ * @param cls unused
+ * @param tc unused
+ */
+static void
+shutdown_task (void *cls,
+ const struct GNUNET_SCHEDULER_TaskContext *tc)
+{
+ struct ClientListEntry *cle;
+
+ GNUNET_SERVER_notification_context_destroy (nc);
+ nc = NULL;
+ while (NULL != (cle = cle_head))
+ {
+ GNUNET_SERVER_client_drop (cle->client);
+ GNUNET_CONTAINER_DLL_remove (cle_head,
+ cle_tail,
+ cle);
+ GNUNET_free (cle);
+ }
+
+ if (coreAPI != NULL)
+ {
+ GNUNET_CORE_disconnect(coreAPI);
+ coreAPI = NULL;
+ }
+
+}
+
+
+/**
+ * Task to schedule a flood message to be sent.
+ *
+ * @param cls closure
+ * @param tc context information (why was this task triggered now)
+ */
+static void schedule_flood_message (void *cls,
+ const struct
+ GNUNET_SCHEDULER_TaskContext * tc)
+{
+ GNUNET_HashCode timestamp_hash;
+ struct GNUNET_TIME_Absolute curr_time;
+ unsigned int matching_bits;
+
+ /* Get the current UTC time */
+ curr_time = GNUNET_TIME_absolute_get();
+ /* Find the previous interval start time */
+ previous_timestamp.abs_value = (curr_time.abs_value / GNUNET_NSE_INTERVAL) * GNUNET_NSE_INTERVAL;
+ /* Find the next interval start time */
+ next_timestamp.abs_value = (curr_time.abs_value / GNUNET_NSE_INTERVAL) * (GNUNET_NSE_INTERVAL + 1);
+
+ GNUNET_CRYPTO_hash(&next_timestamp.abs_value, sizeof(uint64_t), ×tamp_hash);
+ matching_bits = GNUNET_CRYPTO_hash_matching_bits(×tamp_hash, &my_identity.hashPubKey);
+
+ GNUNET_SCHEDULER_add_delayed (
+ GNUNET_TIME_relative_add (
+ GNUNET_TIME_relative_multiply (
+ increment,
+ matching_bits),
+ GNUNET_TIME_absolute_get_remaining (
+ next_timestamp)),
+ &send_flood_message, NULL);
+}
+
+/**
+ * Called on core init/fail.
+ *
+ * @param cls service closure
+ * @param server handle to the server for this service
+ * @param identity the public identity of this peer
+ * @param publicKey the public key of this peer
+ */
+void
+core_init (void *cls,
+ struct GNUNET_CORE_Handle *server,
+ const struct GNUNET_PeerIdentity *identity,
+ const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *publicKey)
+{
+ if (server == NULL)
+ {
+#if DEBUG_NSE
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "%s: Connection to core FAILED!\n", "nse",
+ GNUNET_i2s (identity));
+#endif
+ GNUNET_SCHEDULER_add_now (&shutdown_task, NULL);
+ return;
+ }
+#if DEBUG_NSE
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "%s: Core connection initialized, I am peer: %s\n", "nse",
+ GNUNET_i2s (identity));
+#endif
+
+ /* Copy our identity so we can use it */
+ memcpy (&my_identity, identity, sizeof (struct GNUNET_PeerIdentity));
+
+ flood_task = GNUNET_SCHEDULER_add_now(&schedule_flood_message, NULL);
+}
+
+/**
+ * Handle network size estimate clients.
+ *
+ * @param cls closure
+ * @param server the initialized server
+ * @param c configuration to use
+ */
+static void
+run (void *cls,
+ struct GNUNET_SERVER_Handle *server,
+ const struct GNUNET_CONFIGURATION_Handle *c)
+{
+ static const struct GNUNET_SERVER_MessageHandler handlers[] = {
+ {&handle_start_message, NULL, GNUNET_MESSAGE_TYPE_NSE_START, 0},
+ {NULL, NULL, 0, 0}
+ };
+
+ static const struct GNUNET_CORE_MessageHandler core_handlers[] = {
+ {&handle_p2p_size_estimate, GNUNET_MESSAGE_TYPE_NSE_P2P_FLOOD, 0},
+ {NULL, 0, 0}
+ };
+
+ cfg = c;
+ GNUNET_SERVER_add_handlers (server, handlers);
+ nc = GNUNET_SERVER_notification_context_create (server, 16);
+ GNUNET_SERVER_disconnect_notify (server,
+ &handle_client_disconnect,
+ NULL);
+
+ /** Connect to core service and register core handlers */
+ coreAPI = GNUNET_CORE_connect (cfg, /* Main configuration */
+ DEFAULT_CORE_QUEUE_SIZE, /* queue size */
+ NULL, /* Closure passed to functions */
+ &core_init, /* Call core_init once connected */
+ NULL, /* Handle connects */
+ NULL, /* Handle disconnects */
+ NULL, /* Do we care about "status" updates? */
+ NULL, /* Don't want notified about all incoming messages */
+ GNUNET_NO, /* For header only inbound notification */
+ NULL, /* Don't want notified about all outbound messages */
+ GNUNET_NO, /* For header only outbound notification */
+ core_handlers); /* Register these handlers */
+
+ if (coreAPI == NULL)
+ {
+ GNUNET_SCHEDULER_add_now (&shutdown_task, NULL);
+ return;
+ }
+
+ increment
+ = GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MILLISECONDS,
+ GNUNET_NSE_INTERVAL
+ / (sizeof(GNUNET_HashCode)
+ * 8));
+ /* Set we have no idea defaults for network size estimate */
+ current_size_estimate = NAN;
+ current_std_dev = NAN;
+
+ current_estimate_message.header.size = htons(sizeof(struct GNUNET_NSE_ClientMessage));
+ current_estimate_message.header.type = htons(GNUNET_MESSAGE_TYPE_NSE_ESTIMATE);
+ current_estimate_message.size_estimate = current_size_estimate;
+ current_estimate_message.std_deviation = current_std_dev;
+
+ GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL,
+ &shutdown_task,
+ NULL);
+}
+
+
+/**
+ * The main function for the statistics service.
+ *
+ * @param argc number of arguments from the command line
+ * @param argv command line arguments
+ * @return 0 ok, 1 on error
+ */
+int
+main (int argc, char *const *argv)
+{
+ return (GNUNET_OK ==
+ GNUNET_SERVICE_run (argc,
+ argv,
+ "nse",
+ GNUNET_SERVICE_OPTION_NONE,
+ &run, NULL)) ? 0 : 1;
+}
+
+/* End of gnunet-service-nse.c */
+
--- /dev/null
+/*
+ This file is part of GNUnet.
+ (C) 2001-2011 Christian Grothoff (and other contributing authors)
+
+ GNUnet is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published
+ by the Free Software Foundation; either version 2, 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
+ General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with GNUnet; see the file COPYING. If not, write to the
+ Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA.
+*/
+
+/**
+ * @author Nathan Evans
+ * @file nse/nse.h
+ *
+ * @brief Common type definitions for the network size estimation
+ * service and API.
+ */
+#ifndef NSE_H
+#define NSE_H
+
+#include "gnunet_common.h"
+
+#define DEBUG_NSE GNUNET_YES
+
+#define SIGNED_TIMESTAMP_SIZE sizeof(struct GNUNET_TIME_Absolute)
+
+/** FIXME: define NSE message types here. */
+
+struct GNUNET_Signed_Timestamp
+{
+ char data[SIGNED_TIMESTAMP_SIZE];
+};
+
+/**
+ * Network size estimate sent from the service
+ * to clients. Contains the current size estimate
+ * (or 0 if none has been calculated) and the
+ * standard deviation of known estimates.
+ *
+ */
+struct GNUNET_NSE_ClientMessage
+{
+ /**
+ * Type: GNUNET_MESSAGE_TYPE_NSE_UPDATE
+ */
+ struct GNUNET_MessageHeader header;
+
+ /*
+ * The current estimated network size.
+ */
+ double size_estimate;
+
+ /**
+ * The standard deviation (rounded down
+ * to the nearest integer) of size
+ * estimations.
+ */
+ double std_deviation;
+};
+
+/**
+ * Network size estimate reply; sent when "this"
+ * peer's timer has run out before receiving a
+ * valid reply from another peer.
+ *
+ * FIXME: Is this the right way to do this?
+ * I think we need to include both the public
+ * key and the timestamp signed by the private
+ * key. This way a recipient
+ * can verify that the peer at least generated
+ * the public/private key pair, and that the
+ * timestamp matches what the current peer
+ * believes it should be. The receiving peer
+ * would then check whether the XOR of the peer
+ * identity and the timestamp is within a
+ * reasonable range of the current time
+ * (+/- N seconds). If a closer message which
+ * also verifies hasn't been received (or this
+ * message is a duplicate), the peer
+ * calculates the size estimate and forwards
+ * the request to all other peers.
+ *
+ * Hmm... Is it enought to *just* send the peer
+ * identity? Obviously this is smaller, but it
+ * doesn't allow us to verify that the
+ * public/private key pair were generated, right?
+ */
+struct GNUNET_NSE_ReplyMessage
+{
+ /**
+ * Type: GNUNET_MESSAGE_TYPE_NSE_REPLY
+ */
+ struct GNUNET_MessageHeader header;
+
+ /**
+ * The current timestamp value (which all
+ * peers should agree on) signed by the
+ * private key of the initiating peer.
+ */
+ struct GNUNET_Signed_Timestamp timestamp;
+
+ /**
+ * Public key of the originator, signed timestamp
+ * is decrypted by this.
+ */
+ struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded pkey;
+};
+
+#endif
--- /dev/null
+/*
+ This file is part of GNUnet.
+ (C) 2009, 2010, 2011 Christian Grothoff (and other contributing authors)
+
+ GNUnet is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published
+ by the Free Software Foundation; either version 3, 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
+ General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with GNUnet; see the file COPYING. If not, write to the
+ Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA.
+*/
+
+/**
+ * @file nse/nse_api.c
+ * @brief api to get information from the network size estimation service
+ * @author Nathan Evans
+ *
+ * TODO:
+ */
+#include "platform.h"
+#include "gnunet_client_lib.h"
+#include "gnunet_constants.h"
+#include "gnunet_container_lib.h"
+#include "gnunet_arm_service.h"
+#include "gnunet_hello_lib.h"
+#include "gnunet_protocols.h"
+#include "gnunet_server_lib.h"
+#include "gnunet_time_lib.h"
+#include "gnunet_nse_service.h"
+#include "nse.h"
+
+
+/**
+ * Handle for the service.
+ */
+struct GNUNET_NSE_Handle
+{
+ /**
+ * Configuration to use.
+ */
+ const struct GNUNET_CONFIGURATION_Handle *cfg;
+
+ /**
+ * Socket (if available).
+ */
+ struct GNUNET_CLIENT_Connection *client;
+
+ /**
+ * Currently pending transmission request.
+ */
+ struct GNUNET_CLIENT_TransmitHandle *th;
+
+ /**
+ * Task doing exponential back-off trying to reconnect.
+ */
+ GNUNET_SCHEDULER_TaskIdentifier reconnect_task;
+
+ /**
+ * Time for next connect retry.
+ */
+ struct GNUNET_TIME_Relative reconnect_delay;
+
+ /**
+ * Should this handle auto-destruct once all actions have
+ * been processed?
+ */
+ int do_destroy;
+
+ /**
+ * Are we currently receiving from the service?
+ */
+ int receiving;
+
+ /**
+ * Callback function to call when message is received.
+ */
+ GNUNET_NSE_Callback recv_cb;
+
+ /**
+ * Closure to pass to callback.
+ */
+ void *recv_cb_cls;
+
+};
+
+
+/**
+ * Type of a function to call when we receive a message
+ * from the service.
+ *
+ * @param cls closure
+ * @param msg message received, NULL on timeout or fatal error
+ */
+void message_handler (void *cls,
+ const struct GNUNET_MessageHeader * msg)
+{
+ struct GNUNET_NSE_Handle *h = cls;
+ struct GNUNET_NSE_ClientMessage *client_msg;
+
+ if ((ntohs (msg->size) < sizeof(struct GNUNET_NSE_ClientMessage))
+ || (ntohs (msg->type) != GNUNET_MESSAGE_TYPE_NSE_ESTIMATE))
+ {
+#if DEBUG_NSE
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "%s: received incorrect message (size %d < %d) from service!",
+ "NSE API", ntohs (msg->size),
+ sizeof(struct GNUNET_NSE_ClientMessage));
+#endif
+ return;
+ }
+
+ client_msg = (struct GNUNET_NSE_ClientMessage *)msg;
+
+ h->recv_cb (h->recv_cb_cls, client_msg->size_estimate,
+ client_msg->std_deviation);
+
+ GNUNET_CLIENT_receive (h->client,
+ &message_handler, h, GNUNET_TIME_UNIT_FOREVER_REL);
+}
+
+static void
+reconnect (void *cls,
+ const struct GNUNET_SCHEDULER_TaskContext *tc);
+
+/**
+ * Reschedule a connect attempt to the service.
+ *
+ * @param h transport service to reconnect
+ */
+static void
+reschedule_connect (struct GNUNET_NSE_Handle *h)
+{
+ GNUNET_assert (h->reconnect_task == GNUNET_SCHEDULER_NO_TASK);
+
+ if (NULL != h->th)
+ {
+ GNUNET_CLIENT_notify_transmit_ready_cancel (h->th);
+ h->th = NULL;
+ }
+ if (NULL != h->client)
+ {
+ GNUNET_CLIENT_disconnect (h->client, GNUNET_NO);
+ h->client = NULL;
+ }
+
+#if DEBUG_NSE
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Scheduling task to reconnect to nse service in %llu ms.\n",
+ h->reconnect_delay.rel_value);
+#endif
+ h->reconnect_task
+ = GNUNET_SCHEDULER_add_delayed (h->reconnect_delay,
+ &reconnect, h);
+ if (h->reconnect_delay.rel_value == 0)
+ {
+ h->reconnect_delay = GNUNET_TIME_UNIT_MILLISECONDS;
+ }
+ else
+ {
+ h->reconnect_delay = GNUNET_TIME_relative_multiply (h->reconnect_delay, 2);
+ h->reconnect_delay = GNUNET_TIME_relative_min (GNUNET_TIME_UNIT_SECONDS,
+ h->reconnect_delay);
+ }
+}
+
+/**
+ * Transmit START message to service.
+ *
+ * @param cls unused
+ * @param size number of bytes available in buf
+ * @param buf where to copy the message
+ * @return number of bytes copied to buf
+ */
+static size_t
+send_start (void *cls, size_t size, void *buf)
+{
+ struct GNUNET_NSE_Handle *h = cls;
+ struct GNUNET_MessageHeader *msg;
+
+ h->th = NULL;
+ if (buf == NULL)
+ {
+ /* Connect error... */
+#if DEBUG_NSE
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Shutdown while trying to transmit `%s' request.\n",
+ "START");
+#endif
+ reschedule_connect(h);
+ return 0;
+ }
+#if DEBUG_NSE
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Transmitting `%s' request.\n", "START");
+#endif
+ GNUNET_assert (size >= sizeof (struct GNUNET_MessageHeader));
+
+ msg = (struct GNUNET_MessageHeader *)buf;
+ msg->size = htons (sizeof (struct GNUNET_MessageHeader));
+ msg->type = htons (GNUNET_MESSAGE_TYPE_NSE_START);
+ GNUNET_CLIENT_receive (h->client,
+ &message_handler, h, GNUNET_TIME_UNIT_FOREVER_REL);
+ return sizeof (struct GNUNET_MessageHeader);
+}
+
+/**
+ * Try again to connect to network size estimation service.
+ *
+ * @param cls the handle to the transport service
+ * @param tc scheduler context
+ */
+static void
+reconnect (void *cls,
+ const struct GNUNET_SCHEDULER_TaskContext *tc)
+{
+ struct GNUNET_NSE_Handle *h = cls;
+
+ h->reconnect_task = GNUNET_SCHEDULER_NO_TASK;
+ if ((tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN) != 0)
+ {
+ /* shutdown, just give up */
+ return;
+ }
+#if DEBUG_NSE
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Connecting to network size estimation service.\n");
+#endif
+ GNUNET_assert (h->client == NULL);
+ h->client = GNUNET_CLIENT_connect ("nse", h->cfg);
+ GNUNET_assert (h->client != NULL);
+
+ h->th =
+ GNUNET_CLIENT_notify_transmit_ready (h->client,
+ sizeof(struct GNUNET_MessageHeader),
+ GNUNET_TIME_UNIT_FOREVER_REL,
+ GNUNET_NO,
+ &send_start,
+ h);
+ GNUNET_assert(h->th != NULL);
+}
+
+/**
+ * Connect to the network size estimation service.
+ *
+ * @param cfg the configuration to use
+ * @param func funtion to call with network size estimate
+ * @param func_cls closure to pass for network size estimate callback
+ *
+ * @return handle to use
+ */
+struct GNUNET_NSE_Handle *
+GNUNET_NSE_connect (const struct GNUNET_CONFIGURATION_Handle *cfg,
+ GNUNET_NSE_Callback func, void *func_cls)
+{
+ struct GNUNET_NSE_Handle *ret;
+
+ ret = GNUNET_malloc (sizeof (struct GNUNET_NSE_Handle));
+
+ if (func == NULL)
+ return NULL;
+
+ ret->cfg = cfg;
+ ret->recv_cb = func;
+ ret->recv_cb_cls = func_cls;
+ ret->reconnect_delay = GNUNET_TIME_UNIT_ZERO;
+ ret->reconnect_task = GNUNET_SCHEDULER_add_now (&reconnect, ret);
+ return ret;
+}
+
+/**
+ * Disconnect from network size estimation service
+ *
+ * @param h handle to destroy
+ *
+ */
+void
+GNUNET_NSE_disconnect (struct GNUNET_NSE_Handle *h)
+{
+ GNUNET_assert(h != NULL);
+ if (h->reconnect_task != GNUNET_SCHEDULER_NO_TASK)
+ {
+ GNUNET_SCHEDULER_cancel(h->reconnect_task);
+ h->reconnect_task = GNUNET_SCHEDULER_NO_TASK;
+ }
+ if (h->th != NULL)
+ GNUNET_CLIENT_notify_transmit_ready_cancel(h->th);
+ if (h->client != NULL)
+ GNUNET_CLIENT_disconnect(h->client, GNUNET_NO);
+
+ GNUNET_free(h);
+}
--- /dev/null
+[PATHS]
+SERVICEHOME = /tmp/test-gnunetd-nse/
+DEFAULTCONFIG = test_nse.conf
+
+[nse]
+PORT = 22353
+UNIXPATH = /tmp/test-nse-service-nse.unix
+AUTOSTART = YES
+DEBUG = YES
+
+[arm]
+PORT = 22354
+DEFAULTSERVICES = nse
+UNIXPATH = /tmp/test-nse-service-arm.unix
+#DEBUG = YES
+
+[fs]
+AUTOSTART = NO
+
+[datastore]
+AUTOSTART = NO
+
+[dht]
+AUTOSTART = NO
+
+[transport]
+AUTOSTART = NO
+
+[core]
+AUTOSTART = YES
+
+[peerinfo]
+AUTOSTART = NO
+
+[dns]
+AUTOSTART = NO
+
--- /dev/null
+/*
+ This file is part of GNUnet.
+ (C) 2009 Christian Grothoff (and other contributing authors)
+
+ GNUnet is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published
+ by the Free Software Foundation; either version 3, 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
+ General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with GNUnet; see the file COPYING. If not, write to the
+ Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA.
+*/
+/**
+ * @file nse/test_nse_api.c
+ * @brief testcase for nse_api.c
+ */
+#include "platform.h"
+#include "gnunet_common.h"
+#include "gnunet_getopt_lib.h"
+#include "gnunet_os_lib.h"
+#include "gnunet_program_lib.h"
+#include "gnunet_scheduler_lib.h"
+#include "gnunet_nse_service.h"
+
+#define DEBUG_NSE GNUNET_YES
+
+#define START_ARM GNUNET_YES
+
+static struct GNUNET_NSE_Handle *h;
+
+GNUNET_SCHEDULER_TaskIdentifier die_task;
+
+struct PeerContext
+{
+ struct GNUNET_CONFIGURATION_Handle *cfg;
+#if START_ARM
+ struct GNUNET_OS_Process *arm_proc;
+#endif
+};
+
+static struct PeerContext p1;
+
+/**
+ * Signature of the main function of a task.
+ *
+ * @param cls closure
+ * @param tc context information (why was this task triggered now)
+ */
+static void end_test (void *cls,
+ const struct GNUNET_SCHEDULER_TaskContext * tc)
+{
+ if (h != NULL)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Disconnecting from NSE service.\n");
+ GNUNET_NSE_disconnect (h);
+ }
+}
+
+/**
+ * Callback to call when network size estimate is updated.
+ *
+ * @param cls unused
+ * @param estimate the value of the current network size estimate
+ * @param std_dev standard deviation (rounded down to nearest integer)
+ * of the size estimation values seen
+ * @return GNUNET_OK to continue, GNUNET_SYSERR to abort iteration
+ */
+static int
+check_nse_message (void *cls, double estimate, double std_dev)
+{
+ int *ok = cls;
+
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Received NSE message, estimate %f, standard deviation %f.\n");
+ /* Fantastic check below. Expect NaN, the only thing not equal to itself. */
+ if ((estimate != estimate) && (std_dev != std_dev))
+ (*ok) = 0;
+
+ if (die_task != GNUNET_SCHEDULER_NO_TASK)
+ GNUNET_SCHEDULER_cancel(die_task);
+ GNUNET_SCHEDULER_add_now(&end_test, NULL);
+ return GNUNET_OK;
+}
+
+static void
+setup_peer (struct PeerContext *p, const char *cfgname)
+{
+ p->cfg = GNUNET_CONFIGURATION_create ();
+#if START_ARM
+ p->arm_proc = GNUNET_OS_start_process (NULL, NULL, "gnunet-service-arm",
+ "gnunet-service-arm",
+#if VERBOSE_ARM
+ "-L", "DEBUG",
+#endif
+ "-c", cfgname, NULL);
+#endif
+ GNUNET_assert (GNUNET_OK == GNUNET_CONFIGURATION_load (p->cfg, cfgname));
+
+}
+
+static void
+stop_arm (struct PeerContext *p)
+{
+#if START_ARM
+ if (0 != GNUNET_OS_process_kill (p->arm_proc, SIGTERM))
+ GNUNET_log_strerror (GNUNET_ERROR_TYPE_WARNING, "kill");
+ GNUNET_OS_process_wait (p->arm_proc);
+ GNUNET_OS_process_close (p->arm_proc);
+ p->arm_proc = NULL;
+#endif
+ GNUNET_CONFIGURATION_destroy (p->cfg);
+}
+
+static void
+run (void *cls,
+ char *const *args,
+ const char *cfgfile,
+ const struct GNUNET_CONFIGURATION_Handle *cfg)
+{
+ die_task = GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_relative_multiply
+ (GNUNET_TIME_UNIT_MINUTES, 1),
+ &end_test, NULL);
+
+ setup_peer (&p1, cfgfile);
+ h = GNUNET_NSE_connect (cfg, &check_nse_message, cls);
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Connecting to NSE service.\n");
+ GNUNET_assert (h != NULL);
+}
+
+static int
+check ()
+{
+ int ok = 1;
+ char *const argv[] = { "test-nse-api",
+ "-c",
+ "test_nse.conf",
+#if DEBUG_NSE
+ "-L", "DEBUG",
+#else
+ "-L", "WARNING",
+#endif
+ NULL
+ };
+ struct GNUNET_GETOPT_CommandLineOption options[] = {
+ GNUNET_GETOPT_OPTION_END
+ };
+
+ GNUNET_PROGRAM_run (5, argv, "test-nse-api", "nohelp",
+ options, &run, &ok);
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Stopping arm.\n");
+ stop_arm (&p1);
+ return ok;
+}
+
+int
+main (int argc, char *argv[])
+{
+ int ret;
+
+ GNUNET_log_setup ("test_nse_api",
+#if DEBUG_NSE
+ "DEBUG",
+#else
+ "WARNING",
+#endif
+ NULL);
+ ret = check ();
+
+ return ret;
+}
+
+/* end of test_nse_api.c */
projects / oweals / gnunet.git / commitdiff