/*
- 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.
-*/
+ 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
#include "gnunet_signatures.h"
#include "gnunet_service_lib.h"
#include "gnunet_server_lib.h"
+#include "gnunet_statistics_service.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_HISTORY_SIZE 50
#define DEFAULT_CORE_QUEUE_SIZE 32
-#define DEFAULT_NSE_PRIORITY 0
+#define DEFAULT_NSE_PRIORITY 5
/**
* Entry in the list of clients which
*/
static const struct GNUNET_CONFIGURATION_Handle *cfg;
+/**
+ * Handle to the statistics service.
+ */
+static struct GNUNET_STATISTICS_Handle *stats;
+
/**
* Handle to the core service.
*/
/**
* Array of size estimate messages.
*/
-static struct GNUNET_NSE_FloodMessage size_estimate_messages[DEFAULT_HISTORY_SIZE];
+static struct GNUNET_NSE_FloodMessage
+ size_estimate_messages[DEFAULT_HISTORY_SIZE];
/**
* Index of most recent estimate.
* @param message the message received
*/
static void
-handle_start_message (void *cls,
- struct GNUNET_SERVER_Client *client,
- const struct GNUNET_MessageHeader *message)
+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");
+ GNUNET_log_from (GNUNET_ERROR_TYPE_DEBUG, "NSE",
+ "Received START message from client\n");
#endif
GNUNET_SERVER_notification_context_add (nc, client);
- GNUNET_SERVER_receive_done(client, GNUNET_OK);
+ GNUNET_SERVER_receive_done (client, GNUNET_OK);
}
-
/**
* Called when core is ready to send a message we asked for
* out to the destination.
* @return number of bytes written to buf
*/
static size_t
-transmit_ready (void *cls, size_t size, void *buf)
+transmit_ready(void *cls, size_t size, void *buf)
{
struct NSEPeerEntry *peer_entry = cls;
char *cbuf = buf;
size_t msize;
peer_entry->th = NULL;
+#if DEBUG_NSE
+ GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "%s: transmit_ready called\n",
+ GNUNET_i2s (&my_identity));
+#endif
if (buf == NULL) /* client disconnected */
- return 0;
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
+ "%s: transmit_ready called (disconnect)\n",
+ GNUNET_i2s (&my_identity));
+ return 0;
+ }
if (peer_entry->pending_message == NULL)
- return 0;
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
+ "%s: transmit_ready called (no message)\n",
+ GNUNET_i2s (&my_identity));
+ return 0;
+ }
- msize = ntohs(peer_entry->pending_message->size);
+ msize = ntohs (peer_entry->pending_message->size);
if (msize <= size)
- memcpy(cbuf, peer_entry->pending_message, msize);
-
+ memcpy (cbuf, peer_entry->pending_message, msize);
+#if DEBUG_NSE
+ GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
+ "%s: transmit_ready called (transmit %d bytes)\n",
+ GNUNET_i2s (&my_identity), msize);
+#endif
return msize;
}
*
* @param message the network flood message
*/
-static void update_network_size_estimate(struct GNUNET_NSE_FloodMessage *message)
+static void
+update_network_size_estimate(struct GNUNET_NSE_FloodMessage *message)
{
unsigned int i;
unsigned int count;
double average;
+ double std_dev;
+ double diff;
- size_estimates[estimate_index] = htons(message->distance);
- memcpy(&size_estimate_messages[estimate_index], message, sizeof(struct GNUNET_NSE_FloodMessage));
+ size_estimates[estimate_index] = htonl (message->distance);
+ memcpy (&size_estimate_messages[estimate_index], message,
+ sizeof(struct GNUNET_NSE_FloodMessage));
count = 0;
+ std_dev = 0.0;
+ average = 0.0;
for (i = 0; i < DEFAULT_HISTORY_SIZE; i++)
{
if (size_estimate_messages[i].distance != 0)
{
- average += 1 << htons(size_estimate_messages[i].distance);
+#if AVERAGE_SQUARE
+ average += (1 << htonl (size_estimate_messages[i].distance));
+#else
+ average += htonl (size_estimate_messages[i].distance);
+#endif
count++;
}
}
- average /= (double)count;
- current_estimate_message.size_estimate = average;
- /* Finally, broadcast the current estimate to all clients */
- GNUNET_SERVER_notification_context_broadcast (nc,
- ¤t_estimate_message.header,
- GNUNET_NO);
+
+ if (count > 0)
+ {
+ average /= (double) count;
+ for (i = 0; i < DEFAULT_HISTORY_SIZE; i++)
+ {
+ if (size_estimate_messages[i].distance != 0)
+ {
+#if DEBUG_NSE
+ GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "%s: estimate %d %d\n", GNUNET_i2s(&my_identity), i, (1 << htonl(size_estimate_messages[i].distance)));
+#endif
+#if AVERAGE_SQUARE
+ diff = average
+ - (1 << htonl (size_estimate_messages[i].distance));
+#else
+ diff = average - htonl (size_estimate_messages[i].distance);
+#endif
+ std_dev += diff * diff;
+ }
+ }
+ std_dev /= count;
+ std_dev = sqrt (std_dev);
+ 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 = average;
+ current_estimate_message.std_deviation = std_dev;
+ /* Finally, broadcast the current estimate to all clients */
+#if DEBUG_NSE
+ GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
+ "%s: sending estimate %f -- %f to client\n",
+ GNUNET_i2s (&my_identity),
+ average,
+ std_dev);
+#endif
+ GNUNET_SERVER_notification_context_broadcast (
+ nc,
+ ¤t_estimate_message.header,
+ GNUNET_NO);
+
+ GNUNET_STATISTICS_set (stats, "Current network size estimate",
+ (uint64_t) average, GNUNET_NO);
+ }
}
static void
-send_flood_message (void *cls,
- const struct GNUNET_SCHEDULER_TaskContext * tc);
+send_flood_message(void *cls, const struct GNUNET_SCHEDULER_TaskContext * tc);
/**
* Schedule a flood message to be sent.
* always be a message scheduled to be sent.
*/
static void
-schedule_flood_message (void *cls,
- const struct GNUNET_SCHEDULER_TaskContext *tc)
+schedule_flood_message(void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
{
GNUNET_HashCode timestamp_hash;
struct GNUNET_TIME_Absolute curr_time;
struct GNUNET_TIME_Relative offset;
- struct GNUNET_CRYPTO_RsaSignaturePurpose purpose;
unsigned int matching_bits;
double millisecond_offset;
GNUNET_assert(flood_task == GNUNET_SCHEDULER_NO_TASK);
- if (0 != GNUNET_TIME_absolute_get_remaining(next_timestamp).rel_value)
+ if (0 != GNUNET_TIME_absolute_get_remaining (next_timestamp).rel_value)
{
GNUNET_break(0); /* Shouldn't ever happen! */
- schedule_flood_task = GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_absolute_get_remaining(next_timestamp), &schedule_flood_message, NULL);
+ schedule_flood_task
+ = GNUNET_SCHEDULER_add_delayed (
+ GNUNET_TIME_absolute_get_remaining (
+ next_timestamp),
+ &schedule_flood_message, NULL);
}
/* Get the current UTC time */
- curr_time = GNUNET_TIME_absolute_get();
+ 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;
+ 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);
-
- flood_message.timestamp = GNUNET_TIME_absolute_hton(next_timestamp);
- flood_message.distance = htons(matching_bits);
- flood_message.enc_type = htons(0);
- flood_message.proof_of_work = htonl(0);
- purpose.purpose = GNUNET_SIGNATURE_PURPOSE_NSE_SEND;
- purpose.size = sizeof(struct GNUNET_NSE_FloodMessage) - sizeof(struct GNUNET_MessageHeader) - sizeof(flood_message.proof_of_work) - sizeof(flood_message.signature);
- GNUNET_CRYPTO_rsa_sign(my_private_key, &purpose, &flood_message.signature);
+ next_timestamp.abs_value = previous_timestamp.abs_value + GNUNET_NSE_INTERVAL;
+#if DEBUG_NSE
+ GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
+ "%s: curr_time %lu, prev timestamp %lu, next timestamp %lu\n",
+ GNUNET_i2s (&my_identity), curr_time.abs_value,
+ previous_timestamp.abs_value, next_timestamp.abs_value);
+#endif
+ GNUNET_CRYPTO_hash (&next_timestamp.abs_value,
+ sizeof(next_timestamp.abs_value), ×tamp_hash);
+ matching_bits = GNUNET_CRYPTO_hash_matching_bits (×tamp_hash,
+ &my_identity.hashPubKey);
+
+ flood_message.header.size = htons (sizeof(struct GNUNET_NSE_FloodMessage));
+ flood_message.header.type = htons (GNUNET_MESSAGE_TYPE_NSE_P2P_FLOOD);
+ flood_message.purpose.purpose = htonl (GNUNET_SIGNATURE_PURPOSE_NSE_SEND);
+ flood_message.purpose.size = htonl (sizeof(struct GNUNET_NSE_FloodMessage)
+ - sizeof(struct GNUNET_MessageHeader) - sizeof(flood_message.signature));
+ flood_message.distance = htonl (matching_bits);
+ flood_message.timestamp = GNUNET_TIME_absolute_hton (next_timestamp);
+ memcpy (&flood_message.pkey, &my_public_key,
+ sizeof(struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded));
+ flood_message.proof_of_work = htonl (0);
+ GNUNET_CRYPTO_rsa_sign (my_private_key, &flood_message.purpose,
+ &flood_message.signature);
/*S + f/2 - (f / pi) * (atan(x - p'))*/
// f is frequency (GNUNET_NSE_INTERVAL)
// x is matching_bits
// p' is current_size_estimate
- millisecond_offset = ((double)GNUNET_NSE_INTERVAL / (double)2) - ((GNUNET_NSE_INTERVAL / M_PI) * atan(matching_bits - current_size_estimate));
-
- fprintf(stderr, "my id matches %d bits, offset is %lu\n", matching_bits, (uint64_t)millisecond_offset);
-
- estimate_index += 1;
+ millisecond_offset = ((double) GNUNET_NSE_INTERVAL / (double) 2)
+ - ((GNUNET_NSE_INTERVAL / M_PI) * atan (matching_bits
+ - current_size_estimate));
+#if DEBUG_NSE
+ GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
+ "%s: id matches %d bits, offset is %lu\n\n",
+ GNUNET_i2s (&my_identity), matching_bits,
+ (uint64_t) millisecond_offset);
+#endif
+ /* Stop initial call from incrementing */
+ if (size_estimate_messages[estimate_index].distance != 0)
+ estimate_index += 1;
if (estimate_index >= DEFAULT_HISTORY_SIZE)
estimate_index = 0;
- offset.rel_value = (uint64_t)millisecond_offset + GNUNET_TIME_absolute_get_remaining (next_timestamp).rel_value;
- flood_task = GNUNET_SCHEDULER_add_delayed (offset,
- &send_flood_message, NULL);
+ if (millisecond_offset < curr_time.abs_value - previous_timestamp.abs_value)
+ offset.rel_value = 0;
+ else
+ offset.rel_value = (uint64_t) millisecond_offset + curr_time.abs_value
+ - previous_timestamp.abs_value;
+#if DEBUG_NSE
+ GNUNET_log (
+ GNUNET_ERROR_TYPE_WARNING,
+ "%s: milliseconds until next timestamp %lu, sending flood in %lu\n",
+ GNUNET_i2s (&my_identity),
+ GNUNET_TIME_absolute_get_remaining (next_timestamp).rel_value,
+ offset.rel_value);
+#endif
+ flood_task = GNUNET_SCHEDULER_add_delayed (offset, &send_flood_message, NULL);
}
+#if VERIFY_CRYPTO
+/**
+ * Check whether the given public key
+ * and integer are a valid proof of work.
+ *
+ * @param pkey the public key
+ * @param val the integer
+ * @param want the number of trailing zeroes
+ *
+ * @return GNUNET_YES if valid, GNUNET_NO if not
+ */
+static int check_proof_of_work(struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded pkey, uint64_t val, unsigned int want)
+ {
+
+ return GNUNET_YES;
+ }
+
+/**
+ * Count the trailing zeroes in hash.
+ *
+ * @param hash
+ *
+ * @return the number of trailing zero bits.
+ */
+static unsigned int count_trailing_zeroes(GNUNET_HashCode *hash)
+ {
+ unsigned int hash_count;
+
+ hash_count = sizeof(GNUNET_HashCode) * 8;
+ while ((0 == GNUNET_CRYPTO_hash_get_bit(hash, hash_count)))
+ hash_count--;
+ return (sizeof(GNUNET_HashCode) * 8) - hash_count;
+ }
+
+/**
+ * Given a public key, find an integer such that
+ * the hash of the key concatenated with the integer
+ * has <param>want</param> trailing 0 bits.
+ *
+ * @param pkey the public key
+ * @param want the number of trailing 0 bits
+ *
+ * @return 64 bit number that satisfies the
+ * requirements
+ *
+ * FIXME: use pointer and return GNUNET_YES or
+ * GNUNET_NO in case no such number works?
+ */
+static uint64_t find_proof_of_work(struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *pkey, unsigned int want)
+ {
+ uint64_t counter;
+ static char buf[sizeof(struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded) + sizeof(uint64_t)];
+ unsigned int data_size;
+ static GNUNET_HashCode result;
+
+ data_size = sizeof(struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded) + sizeof(uint64_t);
+ memcpy(buf, pkey, sizeof(struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded));
+ counter = 0;
+ while (counter != (uint64_t)-1)
+ {
+ memcpy(&buf[sizeof(struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded)], &counter, sizeof(uint64_t));
+ GNUNET_CRYPTO_hash(buf, data_size, &result);
+ if (want == count_trailing_zeroes(&result)) /* Found good proof of work! */
+ break;
+ counter++;
+ }
+ if (counter < (uint64_t)-1)
+ return counter; /* Found valid proof of work */
+ else
+ return 0; /* Did not find valid proof of work */
+ }
+
+/**
+ * An incoming flood message has been received which claims
+ * to have more bits matching than any we know in this time
+ * period. Verify the signature and/or proof of work.
+ *
+ * @param incoming_flood the message to verify
+ *
+ * @return GNUNET_YES if the message is verified
+ * GNUNET_NO if the key/signature don't verify
+ */
+static int verify_message_crypto(struct GNUNET_NSE_FloodMessage *incoming_flood)
+ {
+ int ret;
+ if (GNUNET_OK == (ret
+ = GNUNET_CRYPTO_rsa_verify (GNUNET_SIGNATURE_PURPOSE_NSE_SEND,
+ &incoming_flood->purpose,
+ &incoming_flood->signature,
+ &incoming_flood->pkey)))
+ return GNUNET_YES;
+
+ return GNUNET_NO;
+ }
+#endif
+
/**
* Core handler for size estimate flooding messages.
*
const struct GNUNET_TRANSPORT_ATS_Information *atsi)
{
struct GNUNET_NSE_FloodMessage *incoming_flood;
+ struct GNUNET_TIME_Absolute curr_time;
+ uint64_t drift;
- if (ntohs(message->size) != sizeof(struct GNUNET_NSE_FloodMessage))
- return GNUNET_NO;
+#if DEBUG_NSE
+ GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "%s: received flood message!\n",
+ GNUNET_i2s (&my_identity));
+#endif
+ if (ntohs (message->size) != sizeof(struct GNUNET_NSE_FloodMessage))
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "%s: bad message size!\n",
+ GNUNET_i2s (&my_identity));
+ return GNUNET_NO;
+ }
- incoming_flood = (struct GNUNET_NSE_FloodMessage *)message;
- if (ntohs(incoming_flood->distance) <= ntohs(size_estimate_messages[estimate_index].distance)) /* Not closer than our most recent message */
- return GNUNET_OK;
+ GNUNET_STATISTICS_update (stats, "# flood messages received", 1, GNUNET_NO);
+ incoming_flood = (struct GNUNET_NSE_FloodMessage *) message;
+ if (ntohl (incoming_flood->distance)
+ <= ntohl (size_estimate_messages[estimate_index].distance)) /* Not closer than our most recent message */
+ {
+#if DEBUG_NSE
+ GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
+ "%s: distance %d not greater than %d, discarding\n",
+ GNUNET_i2s (&my_identity), ntohl (incoming_flood->distance),
+ ntohl (size_estimate_messages[estimate_index].distance));
+#endif
+ GNUNET_STATISTICS_update (stats,
+ "# flood messages discarded (had closer)", 1,
+ GNUNET_NO);
+ return GNUNET_OK;
+ }
+
+ curr_time = GNUNET_TIME_absolute_get ();
+ if (curr_time.abs_value
+ > GNUNET_TIME_absolute_ntoh (incoming_flood->timestamp).abs_value)
+ drift = curr_time.abs_value
+ - GNUNET_TIME_absolute_ntoh (incoming_flood->timestamp).abs_value;
+ else
+ drift = GNUNET_TIME_absolute_ntoh (incoming_flood->timestamp).abs_value
+ - curr_time.abs_value;
+
+ if (drift > GNUNET_NSE_DRIFT_TOLERANCE)
+ {
+ GNUNET_STATISTICS_update (
+ stats,
+ "# flood messages discarded (clock skew too high)",
+ 1, GNUNET_NO);
+ return GNUNET_OK;
+ }
+
+#if VERIFY_CRYPTO
+ if (GNUNET_YES != verify_message_crypto(incoming_flood))
+ {
+ GNUNET_STATISTICS_update (stats,
+ "# flood messages discarded (bad crypto)",
+ 1, GNUNET_NO);
+ return GNUNET_OK;
+ }
+#endif
/* Have a new, better size estimate! */
- update_network_size_estimate(incoming_flood);
+ update_network_size_estimate (incoming_flood);
+
+ if (flood_task != GNUNET_SCHEDULER_NO_TASK)
+ {
+#if DEBUG_NSE
+ GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "%s: received closer message, canceling my flood task!\n", GNUNET_i2s(&my_identity));
+#endif
+ GNUNET_SCHEDULER_cancel (flood_task);
+ flood_task = GNUNET_SCHEDULER_NO_TASK;
+ }
+ /** Commenting out prevents forwarding of messages */
+#if DO_FORWARD
+ GNUNET_SCHEDULER_add_now(&send_flood_message, &size_estimate_messages[estimate_index]);
+#endif
if (schedule_flood_task != GNUNET_SCHEDULER_NO_TASK)
- GNUNET_SCHEDULER_cancel(schedule_flood_task);
- schedule_flood_task = GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_absolute_get_remaining(next_timestamp), &schedule_flood_message, NULL);
+ GNUNET_SCHEDULER_cancel (schedule_flood_task);
+
+ schedule_flood_task
+ = GNUNET_SCHEDULER_add_delayed (
+ GNUNET_TIME_absolute_get_remaining (
+ next_timestamp),
+ &schedule_flood_message, NULL);
return GNUNET_OK;
}
/**
* Send a flood message.
*
- * If we've gotten here, it means we haven't received
- * a network size estimate message closer than ours.
+ * If we've gotten here, it means either we haven't received
+ * a network size estimate message closer than ours, or
+ * we need to forward a message we received which was closer
+ * than ours.
*/
static void
-send_flood_message (void *cls,
- const struct GNUNET_SCHEDULER_TaskContext * tc)
+send_flood_message(void *cls, const struct GNUNET_SCHEDULER_TaskContext * tc)
{
struct NSEPeerEntry *peer_entry;
+ struct GNUNET_NSE_FloodMessage *to_send;
+
+ if (cls == NULL) /* Means we are sending our OWN flood message */
+ to_send = &flood_message;
+ else
+ /* Received a message from another peer that should be forwarded */
+ to_send = (struct GNUNET_NSE_FloodMessage *) cls;
flood_task = GNUNET_SCHEDULER_NO_TASK;
if ((tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN) != 0)
return;
-
+#if DEBUG_NSE
+ GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
+ "%s: my time has come, sending flood message of size %d!\n",
+ GNUNET_i2s (&my_identity), ntohs (to_send->header.size));
+#endif
peer_entry = peers_head;
while (peer_entry != NULL)
{
+ peer_entry->pending_message = &to_send->header;
peer_entry->th
- = GNUNET_CORE_notify_transmit_ready (coreAPI,
- GNUNET_YES,
+ = GNUNET_CORE_notify_transmit_ready (
+ coreAPI,
+ GNUNET_NO,
DEFAULT_NSE_PRIORITY,
GNUNET_TIME_absolute_get_remaining (
next_timestamp),
&peer_entry->id,
- ntohs (flood_message.header.size),
+ ntohs (to_send->header.size),
&transmit_ready, peer_entry);
+ if (peer_entry->th == NULL)
+ GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
+ "%s: transmit handle is null!\n", GNUNET_i2s (&my_identity));
+#if DEBUG_NSE
+ GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
+ "%s: Sending flood message (distance %d) to %s!\n",
+ GNUNET_i2s (&my_identity), ntohl (to_send->distance),
+ GNUNET_h2s (&peer_entry->id.hashPubKey));
+#endif
peer_entry = peer_entry->next;
}
- update_network_size_estimate(&flood_message);
+ if (cls == NULL) /* Need to update our size estimate */
+ {
+ update_network_size_estimate (to_send);
+ GNUNET_STATISTICS_update (stats, "# flood messages sent", 1, GNUNET_NO);
+ }
+ else
+ GNUNET_STATISTICS_update (stats, "# flood messages forwarded", 1, GNUNET_NO);
+
+#if DEBUG_NSE
+ GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
+ "%s: scheduling schedule_flood_message in %lu\n",
+ GNUNET_i2s (&my_identity),
+ GNUNET_TIME_absolute_get_remaining (next_timestamp).rel_value);
+#endif
if (schedule_flood_task != GNUNET_SCHEDULER_NO_TASK)
- GNUNET_SCHEDULER_cancel(schedule_flood_task);
- schedule_flood_task = GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_absolute_get_remaining(next_timestamp), &schedule_flood_message, NULL);
+ GNUNET_SCHEDULER_cancel (schedule_flood_task);
+
+ schedule_flood_task
+ = GNUNET_SCHEDULER_add_delayed (
+ GNUNET_TIME_absolute_get_remaining (
+ next_timestamp),
+ &schedule_flood_message, NULL);
}
/**
* @param atsi performance data
*/
static void
-handle_core_connect (void *cls,
- const struct GNUNET_PeerIdentity *peer,
- const struct GNUNET_TRANSPORT_ATS_Information *atsi)
+handle_core_connect(void *cls, const struct GNUNET_PeerIdentity *peer,
+ const struct GNUNET_TRANSPORT_ATS_Information *atsi)
{
struct NSEPeerEntry *peer_entry;
+ if (0 == (memcmp (peer, &my_identity, sizeof(struct GNUNET_PeerIdentity))))
+ return; /* Do not connect to self... */
+
peer_entry = GNUNET_malloc(sizeof(struct NSEPeerEntry));
- memcpy(&peer_entry->id, peer, sizeof(struct GNUNET_PeerIdentity));
+ memcpy (&peer_entry->id, peer, sizeof(struct GNUNET_PeerIdentity));
GNUNET_CONTAINER_DLL_insert(peers_head, peers_tail, peer_entry);
}
-
/**
* Method called whenever a peer disconnects.
*
* @param peer peer identity this notification is about
*/
static void
-handle_core_disconnect (void *cls, const struct GNUNET_PeerIdentity *peer)
+handle_core_disconnect(void *cls, const struct GNUNET_PeerIdentity *peer)
{
struct NSEPeerEntry *pos;
+ if (0 == (memcmp (peer, &my_identity, sizeof(struct GNUNET_PeerIdentity))))
+ return; /* Ignore disconnect from self... */
+
pos = peers_head;
- while ((NULL != pos) && (0 != memcmp(&pos->id, peer, sizeof(struct GNUNET_PeerIdentity))))
+ while ((NULL != pos) && (0 != memcmp (&pos->id, peer,
+ sizeof(struct GNUNET_PeerIdentity))))
pos = pos->next;
if (pos == NULL)
{
- GNUNET_log (GNUNET_ERROR_TYPE_WARNING, "Received disconnect before connect!\n");
+ GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
+ "Received disconnect before connect!\n");
GNUNET_break(0); /* Should never receive a disconnect message for a peer we don't know about... */
return;
}
+ /* TODO: decide whether to copy the message, or always use the static pointer */
+#if TODO
if (pos->pending_message != NULL)
- GNUNET_free(pos->pending_message);
+ GNUNET_free(pos->pending_message);
+#endif
if (pos->th != NULL)
- GNUNET_CORE_notify_transmit_ready_cancel(pos->th);
+ GNUNET_CORE_notify_transmit_ready_cancel (pos->th);
GNUNET_CONTAINER_DLL_remove(peers_head, peers_tail, pos);
GNUNET_free(pos);
}
-
/**
* A client disconnected. Remove it from the
* global DLL of clients.
* @param client identification of the client
*/
static void
-handle_client_disconnect (void *cls,
- struct GNUNET_SERVER_Client* client)
+handle_client_disconnect(void *cls, struct GNUNET_SERVER_Client* client)
{
struct ClientListEntry *cle;
if (cle != NULL)
{
- GNUNET_SERVER_client_drop(cle->client);
+ GNUNET_SERVER_client_drop (cle->client);
GNUNET_CONTAINER_DLL_remove(cle_head,
- cle_tail,
- cle);
+ cle_tail,
+ cle);
GNUNET_free(cle);
}
if (coreAPI != NULL)
{
- GNUNET_CORE_disconnect(coreAPI);
+ GNUNET_CORE_disconnect (coreAPI);
coreAPI = NULL;
}
}
* @param tc unused
*/
static void
-shutdown_task (void *cls,
- const struct GNUNET_SCHEDULER_TaskContext *tc)
+shutdown_task(void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
{
struct ClientListEntry *cle;
if (flood_task != GNUNET_SCHEDULER_NO_TASK)
- GNUNET_SCHEDULER_cancel(flood_task);
+ GNUNET_SCHEDULER_cancel (flood_task);
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);
+ cle_tail,
+ cle);
GNUNET_free (cle);
}
if (coreAPI != NULL)
{
- GNUNET_CORE_disconnect(coreAPI);
+ GNUNET_CORE_disconnect (coreAPI);
coreAPI = NULL;
}
-}
+ if (stats != NULL)
+ GNUNET_STATISTICS_destroy (stats, GNUNET_NO);
+}
/**
* Called on core init/fail.
* @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)
+core_init(void *cls, struct GNUNET_CORE_Handle *server,
+ const struct GNUNET_PeerIdentity *identity,
+ const struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded *publicKey)
{
+ struct GNUNET_TIME_Absolute curr_time;
if (server == NULL)
{
#if DEBUG_NSE
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "%s: Connection to core FAILED!\n", "nse",
- GNUNET_i2s (identity));
+ 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));
+ memcpy (&my_identity, identity, sizeof(struct GNUNET_PeerIdentity));
/* Copy our public key for inclusion in flood messages */
- memcpy (&my_public_key, publicKey, sizeof(struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded));
-
- flood_message.header.size = htons(sizeof(struct GNUNET_NSE_FloodMessage));
- flood_message.header.type = htons(GNUNET_MESSAGE_TYPE_NSE_P2P_FLOOD);
- memcpy(&flood_message.pkey, &my_public_key, sizeof(struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded));
+ memcpy (&my_public_key, publicKey,
+ sizeof(struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded));
if (flood_task != GNUNET_SCHEDULER_NO_TASK)
- GNUNET_SCHEDULER_cancel(flood_task);
+ GNUNET_SCHEDULER_cancel (flood_task);
- schedule_flood_task = GNUNET_SCHEDULER_add_now(&schedule_flood_message, NULL);
+ /* 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 = previous_timestamp.abs_value + GNUNET_NSE_INTERVAL;
- GNUNET_SERVER_notification_context_broadcast (nc,
+#if DEBUG_NSE
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "%s: Core connection initialized, I am peer: %s, scheduling flood task in %lu\n", "nse",
+ GNUNET_i2s (identity), GNUNET_TIME_absolute_get_remaining(next_timestamp));
+#endif
+ /* FIXME: In production, we'd likely want to do this immediately, but in test-beds it causes stupid behavior */
+ if (schedule_flood_task != GNUNET_SCHEDULER_NO_TASK)
+ GNUNET_SCHEDULER_cancel (schedule_flood_task);
+ schedule_flood_task
+ = GNUNET_SCHEDULER_add_delayed (
+ GNUNET_TIME_absolute_get_remaining (
+ next_timestamp),
+ &schedule_flood_message, NULL);
+
+ GNUNET_SERVER_notification_context_broadcast (
+ nc,
¤t_estimate_message.header,
GNUNET_NO);
}
* @param c configuration to use
*/
static void
-run (void *cls,
- struct GNUNET_SERVER_Handle *server,
- const struct GNUNET_CONFIGURATION_Handle *c)
+run(void *cls, struct GNUNET_SERVER_Handle *server,
+ const struct GNUNET_CONFIGURATION_Handle *c)
{
char *keyfile;
- 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_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}
- };
+ static const struct GNUNET_CORE_MessageHandler core_handlers[] =
+ {
+ { &handle_p2p_size_estimate, GNUNET_MESSAGE_TYPE_NSE_P2P_FLOOD, 0 },
+ { NULL, 0, 0 } };
cfg = c;
- if (GNUNET_OK !=
- GNUNET_CONFIGURATION_get_value_filename (c,
- "GNUNETD",
- "HOSTKEY", &keyfile))
+ if (GNUNET_OK
+ != GNUNET_CONFIGURATION_get_value_filename (c, "GNUNETD", "HOSTKEY",
+ &keyfile))
{
- GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
- _
- ("NSE service is lacking key configuration settings. Exiting.\n"));
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR, _
+ ("NSE service is lacking key configuration settings. Exiting.\n"));
GNUNET_SCHEDULER_shutdown ();
return;
}
if (my_private_key == NULL)
{
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
- _("NSE Service could not access hostkey. Exiting.\n"));
+ _("NSE Service could not access hostkey. Exiting.\n"));
GNUNET_SCHEDULER_shutdown ();
return;
}
GNUNET_SERVER_add_handlers (server, handlers);
nc = GNUNET_SERVER_notification_context_create (server, 16);
- GNUNET_SERVER_disconnect_notify (server,
- &handle_client_disconnect,
- NULL);
+ GNUNET_SERVER_disconnect_notify (server, &handle_client_disconnect, NULL);
flood_task = GNUNET_SCHEDULER_NO_TASK;
/** 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 */
- &handle_core_connect, /* Handle connects */
- &handle_core_disconnect, /* 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 */
+ 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 */
+ &handle_core_connect, /* Handle connects */
+ &handle_core_disconnect, /* 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)
{
return;
}
+ stats = GNUNET_STATISTICS_create ("NSE", cfg);
+
increment
= GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MILLISECONDS,
GNUNET_NSE_INTERVAL
- / (sizeof(GNUNET_HashCode)
- * 8));
+ / (sizeof(GNUNET_HashCode) * 8));
/* Set we have no idea defaults for network size estimate */
current_size_estimate = 0.0;
current_std_dev = NAN;
size_estimates[estimate_index] = 0;
- 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.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,
+ GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL, &shutdown_task,
NULL);
}
-
/**
* The main function for the statistics service.
*
* @return 0 ok, 1 on error
*/
int
-main (int argc, char *const *argv)
+main(int argc, char * const *argv)
{
- return (GNUNET_OK ==
- GNUNET_SERVICE_run (argc,
- argv,
- "nse",
- GNUNET_SERVICE_OPTION_NONE,
- &run, NULL)) ? 0 : 1;
+ return (GNUNET_OK == GNUNET_SERVICE_run (argc, argv, "nse",
+ GNUNET_SERVICE_OPTION_NONE, &run,
+ NULL)) ? 0 : 1;
}
/* End of gnunet-service-nse.c */
projects / oweals / gnunet.git / commitdiff