#include <stdlib.h>
#include "platform.h"
+#include "gnunet_constants.h"
#include "gnunet_core_service.h"
#include "gnunet_protocols.h"
#include "gnunet_peerinfo_service.h"
* For how long do we blacklist a peer after a failed connection
* attempt?
*/
-#define BLACKLIST_AFTER_ATTEMPT GNUNET_TIME_UNIT_HOURS
+#define GREYLIST_AFTER_ATTEMPT GNUNET_TIME_UNIT_HOURS
/**
* For how long do we blacklist a friend after a failed connection
* attempt?
*/
-#define BLACKLIST_AFTER_ATTEMPT_FRIEND GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MINUTES, 15)
+#define GREYLIST_AFTER_ATTEMPT_FRIEND GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_MINUTES, 15)
/**
* How often do we at most advertise any HELLO to a peer?
/**
- * List of neighbours, friends and blacklisted peers.
+ * Record for neighbours, friends and blacklisted peers.
*/
-struct PeerList
+struct Peer
{
-
/**
- * This is a linked list.
+ * Which peer is this entry about?
*/
- struct PeerList *next;
+ struct GNUNET_PeerIdentity pid;
/**
* Our handle for the request to transmit HELLOs to this peer; NULL
*/
struct GNUNET_TRANSPORT_BlacklistRequest *wh;
- /**
- * Is this peer listed here because he is a friend?
- */
- int is_friend;
-
- /**
- * Are we connected to this peer right now?
- */
- int is_connected;
-
- /**
- * Are we currently blocking this peer (via blacklist)?
- */
- int is_blocked;
-
/**
* Until what time should we not try to connect again
* to this peer?
*/
- struct GNUNET_TIME_Absolute blacklisted_until;
+ struct GNUNET_TIME_Absolute greylisted_until;
/**
* Next time we are allowed to transmit a HELLO to this peer?
GNUNET_SCHEDULER_TaskIdentifier hello_delay_task;
/**
- * ID of the peer.
+ * ID of task we use to clear peers from the greylist.
*/
- struct GNUNET_PeerIdentity id;
+ GNUNET_SCHEDULER_TaskIdentifier greylist_clean_task;
+
+ /**
+ * Is this peer listed here because he is a friend?
+ */
+ int is_friend;
+
+ /**
+ * Are we connected to this peer right now?
+ */
+ int is_connected;
+
+ /**
+ * Are we currently blocking this peer (via blacklist)?
+ */
+ int is_blocked;
};
static struct GNUNET_PeerIdentity my_identity;
/**
- * Linked list of all of our friends, all of our current neighbours
- * and all peers for which we have HELLOs. So pretty much everyone.
+ * All of our friends, all of our current neighbours and all peers for
+ * which we have HELLOs. So pretty much everyone. Maps peer identities
+ * to 'struct Peer *' values.
*/
-static struct PeerList *peers;
+static struct GNUNET_CONTAINER_MultiHashMap *peers;
/**
* Handle for reporting statistics.
/**
* Force a disconnect from the specified peer.
+ *
+ * @param pl peer to disconnect
*/
static void
-force_disconnect (struct PeerList *pl)
+force_disconnect (struct Peer *pl)
{
- const struct GNUNET_PeerIdentity *peer = &pl->id;
+ const struct GNUNET_PeerIdentity *peer = &pl->pid;
struct DisconnectList *dl;
if (NULL != pl->wh)
* Function called once our request to 'whitelist' a peer
* has completed.
*
- * @param cls our 'struct PeerList'
+ * @param cls our 'struct Peer'
* @param tc unused
*/
static void
whitelist_done (void *cls,
const struct GNUNET_SCHEDULER_TaskContext *tc)
{
- struct PeerList *pl = cls;
+ struct Peer *pl = cls;
pl->wh = NULL;
GNUNET_STATISTICS_update (stats,
}
+/**
+ * Whitelist the given peer (if it was blacklisted before).
+ *
+ * @param cls closure (not used)
+ * @param pid identity of the peer
+ * @param value peer to free
+ * @return GNUNET_YES (always: continue to iterate)
+ */
+static int
+whitelist_peer (void *cls,
+ const GNUNET_HashCode *pid,
+ void *value)
+{
+ struct Peer *pl = value;
+
+ if (! pl->is_blocked)
+ return GNUNET_YES;
+ pl->wh = GNUNET_TRANSPORT_blacklist (sched, cfg,
+ &pl->pid,
+ GNUNET_TIME_UNIT_ZERO,
+ GNUNET_TIME_UNIT_FOREVER_REL,
+ &whitelist_done,
+ pl);
+ pl->is_blocked = GNUNET_NO;
+ return GNUNET_YES;
+}
+
+
/**
* Whitelist all peers that we blacklisted; we've passed
* the minimum number of friends.
static void
whitelist_peers ()
{
- struct PeerList *pl;
struct DisconnectList *dl;
/* first, cancel all blacklisting requests */
}
/* then, specifically whitelist all peers that we
know to have blacklisted */
- pl = peers;
- while (pl != NULL)
- {
- if (pl->is_blocked)
- {
- pl->wh = GNUNET_TRANSPORT_blacklist (sched, cfg,
- &pl->id,
- GNUNET_TIME_UNIT_ZERO,
- GNUNET_TIME_UNIT_FOREVER_REL,
- &whitelist_done,
- pl);
- pl->is_blocked = GNUNET_NO;
- }
- pl = pl->next;
- }
+ GNUNET_CONTAINER_multihashmap_iterate (peers,
+ &whitelist_peer,
+ NULL);
}
/**
* Function called by core when our attempt to connect succeeded.
+ *
+ * @param cls the 'struct Peer' for which we issued the connect request
+ * @param tc scheduler context
*/
static void
connect_completed_callback (void *cls,
const struct GNUNET_SCHEDULER_TaskContext *tc)
{
- struct PeerList *pos = cls;
+ struct Peer *pos = cls;
pos->connect_req = NULL;
}
+/**
+ * Check if an additional connection from the given peer is allowed.
+ *
+ * @param peer connection to check
+ * @return GNUNET_OK if the connection is allowed
+ */
+static int
+is_connection_allowed (struct Peer *peer)
+{
+ if (0 == memcmp (&my_identity,
+ &peer->pid,
+ sizeof (struct GNUNET_PeerIdentity)))
+ return GNUNET_SYSERR; /* disallow connections to self */
+ if (peer->is_friend)
+ return GNUNET_OK;
+ if (GNUNET_YES == friends_only)
+ {
+#if DEBUG_TOPOLOGY
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Determined that `%s' is not allowed to connect (not a friend)\n",
+ GNUNET_i2s (&peer->pid));
+#endif
+ return GNUNET_SYSERR;
+ }
+ if (friend_count >= minimum_friend_count)
+ return GNUNET_OK;
+#if DEBUG_TOPOLOGY
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Determined that `%s' is not allowed to connect (not enough connected friends)\n",
+ GNUNET_i2s (&peer->pid));
+#endif
+ return GNUNET_SYSERR;
+}
+
+
+/**
+ * Free all resources associated with the given peer.
+ *
+ * @param cls closure (not used)
+ * @param pid identity of the peer
+ * @param value peer to free
+ * @return GNUNET_YES (always: continue to iterate)
+ */
+static int
+free_peer (void *cls,
+ const GNUNET_HashCode *pid,
+ void *value)
+{
+ struct Peer *pos = value;
+
+ GNUNET_break (GNUNET_OK ==
+ GNUNET_CONTAINER_multihashmap_remove (peers,
+ pid,
+ pos));
+ if (pos->hello_req != NULL)
+ GNUNET_CORE_notify_transmit_ready_cancel (pos->hello_req);
+ if (pos->wh != NULL)
+ GNUNET_TRANSPORT_blacklist_cancel (pos->wh);
+ if (pos->connect_req != NULL)
+ GNUNET_CORE_peer_request_connect_cancel (pos->connect_req);
+ if (pos->hello_delay_task != GNUNET_SCHEDULER_NO_TASK)
+ GNUNET_SCHEDULER_cancel (sched,
+ pos->hello_delay_task);
+ GNUNET_free_non_null (pos->hello);
+ if (pos->filter != NULL)
+ GNUNET_CONTAINER_bloomfilter_free (pos->filter);
+ GNUNET_free (pos);
+ return GNUNET_YES;
+}
+
+
+/**
+ * Discard peer entries for greylisted peers
+ * where the greylisting has expired.
+ *
+ * @param cls 'struct Peer' to greylist
+ * @param tc scheduler context
+ */
+static void
+remove_from_greylist (void *cls,
+ const struct GNUNET_SCHEDULER_TaskContext *tc);
+
+
/**
* Try to connect to the specified peer.
*
* @param pos peer to connect to
*/
static void
-attempt_connect (struct PeerList *pos)
+attempt_connect (struct Peer *pos)
{
+ struct GNUNET_TIME_Relative rem;
+
+ if ( (connection_count >= target_connection_count) &&
+ (friend_count >= minimum_friend_count) )
+ return;
+ if (GNUNET_YES == pos->is_connected)
+ return;
+ if (GNUNET_OK != is_connection_allowed (pos))
+ return;
+ if (GNUNET_YES == pos->is_blocked)
+ return;
+ if (GNUNET_TIME_absolute_get_remaining (pos->greylisted_until).value > 0)
+ return;
if (GNUNET_YES == pos->is_friend)
- pos->blacklisted_until = GNUNET_TIME_relative_to_absolute (BLACKLIST_AFTER_ATTEMPT_FRIEND);
+ rem = GREYLIST_AFTER_ATTEMPT_FRIEND;
else
- pos->blacklisted_until = GNUNET_TIME_relative_to_absolute (BLACKLIST_AFTER_ATTEMPT);
+ rem = GREYLIST_AFTER_ATTEMPT;
+ /* FIXME: do exponential back-off? */
+ pos->greylisted_until = GNUNET_TIME_relative_to_absolute (rem);
+ if (pos->greylist_clean_task != GNUNET_SCHEDULER_NO_TASK)
+ GNUNET_SCHEDULER_cancel (sched,
+ pos->greylist_clean_task);
+ pos->greylist_clean_task
+ = GNUNET_SCHEDULER_add_delayed (sched,
+ rem,
+ &remove_from_greylist,
+ pos);
#if DEBUG_TOPOLOGY
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Asking core to connect to `%s'\n",
- GNUNET_i2s (&pos->id));
+ "Asking to connect to `%s'\n",
+ GNUNET_i2s (&pos->pid));
#endif
GNUNET_STATISTICS_update (stats,
gettext_noop ("# connect requests issued to core"),
GNUNET_NO);
pos->connect_req = GNUNET_CORE_peer_request_connect (sched, cfg,
GNUNET_TIME_UNIT_MINUTES,
- &pos->id,
+ &pos->pid,
&connect_completed_callback,
pos);
}
/**
- * Find a peer in our linked list.
- * FIXME: should probably use a hash map instead.
+ * Discard peer entries for greylisted peers
+ * where the greylisting has expired.
+ *
+ * @param cls 'struct Peer' to greylist
+ * @param tc scheduler context
*/
-struct PeerList *
-find_peer (const struct GNUNET_PeerIdentity * peer)
+static void
+remove_from_greylist (void *cls,
+ const struct GNUNET_SCHEDULER_TaskContext *tc)
{
- struct PeerList *pos;
+ struct Peer *pos = cls;
+ struct GNUNET_TIME_Relative rem;
- pos = peers;
- while (pos != NULL)
+ pos->greylist_clean_task = GNUNET_SCHEDULER_NO_TASK;
+ rem = GNUNET_TIME_absolute_get_remaining (pos->greylisted_until);
+ if (rem.value == 0)
{
- if (0 == memcmp (&pos->id, peer, sizeof (struct GNUNET_PeerIdentity)))
- return pos;
- pos = pos->next;
+ attempt_connect (pos);
}
- return NULL;
-}
-
-
-/**
- * Check if an additional connection from the given peer is allowed.
- */
-static int
-is_connection_allowed (struct PeerList *peer)
-{
- if (0 == memcmp (&my_identity, &peer->id, sizeof (struct GNUNET_PeerIdentity)))
- return GNUNET_SYSERR; /* disallow connections to self */
- if (peer->is_friend)
- return GNUNET_OK;
- if (GNUNET_YES == friends_only)
+ else
{
-#if DEBUG_TOPOLOGY
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Determined that `%s' is not allowed to connect (not a friend)\n",
- GNUNET_i2s (&peer->id));
-#endif
- return GNUNET_SYSERR;
+ pos->greylist_clean_task
+ = GNUNET_SCHEDULER_add_delayed (sched,
+ rem,
+ &remove_from_greylist,
+ pos);
+ }
+ if ( (GNUNET_NO == pos->is_friend) &&
+ (GNUNET_NO == pos->is_blocked) &&
+ (GNUNET_NO == pos->is_connected) )
+ {
+ free_peer (NULL, &pos->pid.hashPubKey, pos);
+ return;
}
- if (friend_count >= minimum_friend_count)
- return GNUNET_OK;
-#if DEBUG_TOPOLOGY
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Determined that `%s' is not allowed to connect (not enough connected friends)\n",
- GNUNET_i2s (&peer->id));
-#endif
- return GNUNET_SYSERR;
}
* @param is_friend is the new entry for a friend?
* @return the new entry
*/
-static struct PeerList *
+static struct Peer *
make_peer (const struct
GNUNET_PeerIdentity * peer,
const struct GNUNET_HELLO_Message *hello,
int is_friend)
{
- struct PeerList *ret;
+ struct Peer *ret;
- ret = GNUNET_malloc (sizeof (struct PeerList));
- ret->id = *peer;
+ ret = GNUNET_malloc (sizeof (struct Peer));
+ ret->pid = *peer;
ret->is_friend = is_friend;
if (hello != NULL)
{
memcpy (ret->hello, hello,
GNUNET_HELLO_size (hello));
}
- ret->next = peers;
- peers = ret;
+ GNUNET_CONTAINER_multihashmap_put (peers,
+ &peer->hashPubKey,
+ ret,
+ GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
return ret;
}
-/**
- * Free all resources associated with the given peer.
- *
- * @param peer peer to free
- */
-static void
-free_peer (struct PeerList *peer)
-{
- struct PeerList *pos;
- struct PeerList *prev;
-
- prev = NULL;
- pos = peers;
- while (peer != pos)
- {
- prev = pos;
- pos = pos->next;
- }
- GNUNET_assert (pos != NULL);
- if (prev == NULL)
- peers = pos->next;
- else
- prev->next = pos->next;
- if (pos->hello_req != NULL)
- GNUNET_CORE_notify_transmit_ready_cancel (pos->hello_req);
- if (pos->wh != NULL)
- GNUNET_TRANSPORT_blacklist_cancel (pos->wh);
- if (pos->connect_req != NULL)
- GNUNET_CORE_peer_request_connect_cancel (pos->connect_req);
- if (pos->hello_delay_task != GNUNET_SCHEDULER_NO_TASK)
- GNUNET_SCHEDULER_cancel (sched,
- pos->hello_delay_task);
- GNUNET_free_non_null (pos->hello);
- if (pos->filter != NULL)
- GNUNET_CONTAINER_bloomfilter_free (peer->filter);
- GNUNET_free (pos);
-}
-
-
/**
* Setup bloom filter for the given peer entry.
*
* @param peer entry to initialize
*/
static void
-setup_filter (struct PeerList *peer)
+setup_filter (struct Peer *peer)
{
/* 2^{-5} chance of not sending a HELLO to a peer is
acceptably small (if the filter is 50% full);
peer->filter = GNUNET_CONTAINER_bloomfilter_load (NULL, 64, 5);
peer->filter_expiration = GNUNET_TIME_relative_to_absolute (HELLO_ADVERTISEMENT_MIN_REPEAT_FREQUENCY);
/* never send a peer its own HELLO */
- GNUNET_CONTAINER_bloomfilter_add (peer->filter, &peer->id.hashPubKey);
+ GNUNET_CONTAINER_bloomfilter_add (peer->filter, &peer->pid.hashPubKey);
}
/**
* Function to fill send buffer with HELLO.
*
- * @param cls 'struct PeerList' of the target peer
+ * @param cls 'struct Peer' of the target peer
* @param size number of bytes available in buf
* @param buf where the callee should write the message
* @return number of bytes written to buf
void *buf);
+
+
+/**
+ * Closure for 'find_advertisable_hello'.
+ */
+struct FindAdvHelloContext {
+
+ /**
+ * Peer we want to advertise to.
+ */
+ struct Peer *peer;
+
+ /**
+ * Where to store the result (peer selected for advertising).
+ */
+ struct Peer *result;
+
+ /**
+ * Maximum HELLO size we can use right now.
+ */
+ size_t max_size;
+
+ struct GNUNET_TIME_Relative next_adv;
+};
+
+
+/**
+ * Find a peer that would be reasonable for advertising.
+ *
+ * @param cls closure
+ * @param pid identity of a peer
+ * @param value 'struct Peer*' for the peer we are considering
+ * @return GNUNET_YES (continue iteration)
+ */
+static int
+find_advertisable_hello (void *cls,
+ const GNUNET_HashCode *pid,
+ void *value)
+{
+ struct FindAdvHelloContext *fah = cls;
+ struct Peer *pos = value;
+ struct GNUNET_TIME_Relative rst_time;
+ size_t hs;
+
+ if (pos == fah->peer)
+ return GNUNET_YES;
+ if (pos->hello == NULL)
+ return GNUNET_YES;
+ rst_time = GNUNET_TIME_absolute_get_remaining (pos->filter_expiration);
+ if (0 == rst_time.value)
+ {
+ /* time to discard... */
+ GNUNET_CONTAINER_bloomfilter_free (pos->filter);
+ setup_filter (pos);
+ }
+ fah->next_adv = GNUNET_TIME_relative_min (rst_time,
+ fah->next_adv);
+ hs = GNUNET_HELLO_size (pos->hello);
+ if (hs > fah->max_size)
+ return GNUNET_YES;
+ if (GNUNET_NO ==
+ GNUNET_CONTAINER_bloomfilter_test (pos->filter,
+ &fah->peer->pid.hashPubKey))
+ fah->result = pos;
+ return GNUNET_YES;
+}
+
+
/**
* Calculate when we would like to send the next HELLO to this
* peer and ask for it.
schedule_next_hello (void *cls,
const struct GNUNET_SCHEDULER_TaskContext *tc)
{
- struct PeerList *pl = cls;
- struct PeerList *pos;
- struct PeerList *next;
- uint16_t next_want;
- struct GNUNET_TIME_Relative next_adv;
- struct GNUNET_TIME_Relative rst_time;
-
+ struct Peer *pl = cls;
+ struct FindAdvHelloContext fah;
+ size_t next_want;
+ struct GNUNET_TIME_Relative delay;
+
pl->hello_delay_task = GNUNET_SCHEDULER_NO_TASK;
if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
return; /* we're out of here */
- next_want = 0;
- next_adv = GNUNET_TIME_UNIT_FOREVER_REL;
+ if (pl->hello_req != NULL)
+ return; /* did not finish sending the previous one */
/* find applicable HELLOs */
- next = peers;
- while (NULL != (pos = next))
- {
- next = pos->next;
- if (pos->hello == NULL)
- continue;
- rst_time = GNUNET_TIME_absolute_get_remaining (pos->filter_expiration);
- if (0 == rst_time.value)
- {
- /* time to discard... */
- GNUNET_CONTAINER_bloomfilter_free (pos->filter);
- setup_filter (pos);
- }
- else
- {
- if (rst_time.value < next_adv.value)
- next_want = GNUNET_HELLO_size (pos->hello);
- next_adv = GNUNET_TIME_relative_min (rst_time,
- next_adv);
- }
- if (GNUNET_NO ==
- GNUNET_CONTAINER_bloomfilter_test (pos->filter,
- &pl->id.hashPubKey))
- break;
- }
- if (pos != NULL)
- next_adv = GNUNET_TIME_absolute_get_remaining (pl->next_hello_allowed);
- if (next_adv.value == 0)
+ fah.peer = pl;
+ fah.result = NULL;
+ fah.max_size = GNUNET_SERVER_MAX_MESSAGE_SIZE;
+ fah.next_adv = GNUNET_TIME_UNIT_FOREVER_REL;
+ GNUNET_CONTAINER_multihashmap_iterate (peers,
+ &find_advertisable_hello,
+ &fah);
+ pl->hello_delay_task
+ = GNUNET_SCHEDULER_add_delayed (sched,
+ fah.next_adv,
+ &schedule_next_hello,
+ pl);
+ if (fah.result == NULL)
+ return;
+ next_want = GNUNET_HELLO_size (fah.result->hello);
+ delay = GNUNET_TIME_absolute_get_remaining (pl->next_hello_allowed);
+ if (delay.value == 0)
{
/* now! */
pl->hello_req = GNUNET_CORE_notify_transmit_ready (handle, 0,
- next_adv,
- &pl->id,
+ GNUNET_CONSTANTS_SERVICE_TIMEOUT,
+ &pl->pid,
next_want,
&hello_advertising_ready,
pl);
return;
}
- pl->hello_delay_task
- = GNUNET_SCHEDULER_add_delayed (sched,
- next_adv,
- &schedule_next_hello,
- pl);
}
* Cancel existing requests for sending HELLOs to this peer
* and recalculate when we should send HELLOs to it based
* on our current state (something changed!).
+ *
+ * @param cls closure, 'struct Peer' to skip, or NULL
+ * @param pid identity of a peer
+ * @param value 'struct Peer*' for the peer
+ * @return GNUNET_YES (always)
*/
-static void
-reschedule_hellos (struct PeerList *peer)
+static int
+reschedule_hellos (void *cls,
+ const GNUNET_HashCode *pid,
+ void *value)
{
+ struct Peer *peer = value;
+ struct Peer *skip = cls;
+
+ if (skip == peer)
+ return GNUNET_YES;
+ if (! peer->is_connected)
+ return GNUNET_YES;
if (peer->hello_req != NULL)
{
GNUNET_CORE_notify_transmit_ready_cancel (peer->hello_req);
peer->hello_req = NULL;
}
- if (peer->hello_delay_task != GNUNET_SCHEDULER_NO_TASK)
- {
- GNUNET_SCHEDULER_cancel (sched,
- peer->hello_delay_task);
- peer->hello_delay_task = GNUNET_SCHEDULER_NO_TASK;
- }
- peer->hello_delay_task
- = GNUNET_SCHEDULER_add_now (sched,
- &schedule_next_hello,
- peer);
+ if (peer->hello_delay_task != GNUNET_SCHEDULER_NO_TASK)
+ {
+ GNUNET_SCHEDULER_cancel (sched,
+ peer->hello_delay_task);
+ peer->hello_delay_task = GNUNET_SCHEDULER_NO_TASK;
+ }
+ peer->hello_delay_task
+ = GNUNET_SCHEDULER_add_now (sched,
+ &schedule_next_hello,
+ peer);
+ return GNUNET_YES;
}
struct GNUNET_TIME_Relative latency,
uint32_t distance)
{
- struct PeerList *pos;
+ struct Peer *pos;
#if DEBUG_TOPOLOGY
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
gettext_noop ("# peers connected"),
connection_count,
GNUNET_NO);
- pos = find_peer (peer);
+ pos = GNUNET_CONTAINER_multihashmap_get (peers, &peer->hashPubKey);
if (pos == NULL)
{
pos = make_peer (peer, NULL, GNUNET_NO);
else
{
GNUNET_assert (GNUNET_NO == pos->is_connected);
- pos->blacklisted_until.value = 0; /* remove blacklisting */
+ pos->greylisted_until.value = 0; /* remove greylisting */
}
pos->is_connected = GNUNET_YES;
if (pos->is_friend)
connection_count,
GNUNET_NO);
}
- reschedule_hellos (pos);
+ reschedule_hellos (NULL, &peer->hashPubKey, pos);
}
/**
* Disconnect from all non-friends (we're below quota).
+ *
+ * @param cls closure, not used
+ * @param pid identity of a peer
+ * @param value 'struct Peer*' for the peer
+ * @return GNUNET_YES (continue to iterate)
*/
-static void
-drop_non_friends ()
+static int
+drop_non_friends (void *cls,
+ const GNUNET_HashCode *pid,
+ void *value)
{
- struct PeerList *pos;
+ struct Peer *pos = value;
- pos = peers;
- while (pos != NULL)
+ if ( (GNUNET_NO == pos->is_friend) &&
+ (GNUNET_YES == pos->is_connected) )
{
- if ( (GNUNET_NO == pos->is_friend) &&
- (GNUNET_YES == pos->is_connected) )
- {
#if DEBUG_TOPOLOGY
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Connection to `%s' is not from a friend, forcing disconnect!\n",
- GNUNET_i2s (&pos->id));
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Connection to `%s' is not from a friend, forcing disconnect!\n",
+ GNUNET_i2s (&pos->pid));
#endif
- force_disconnect (pos);
- }
- pos = pos->next;
+ force_disconnect (pos);
}
+ return GNUNET_YES;
}
/**
* Try to add more peers to our connection set.
+ *
+ * @param cls closure, not used
+ * @param pid identity of a peer
+ * @param value 'struct Peer*' for the peer
+ * @return GNUNET_YES (continue to iterate)
*/
-static void
-try_add_peers ()
+static int
+try_add_peers (void *cls,
+ const GNUNET_HashCode *pid,
+ void *value)
{
- struct PeerList *pos;
+ struct Peer *pos = value;
- pos = peers;
- while (pos != NULL)
- {
- if ( (GNUNET_TIME_absolute_get_remaining (pos->blacklisted_until).value == 0) &&
- ( (GNUNET_YES == pos->is_friend) ||
- (friend_count >= minimum_friend_count) ) &&
- (GNUNET_YES != pos->is_connected) )
- attempt_connect (pos);
- pos = pos->next;
- }
+ attempt_connect (pos);
+ return GNUNET_YES;
}
const struct
GNUNET_PeerIdentity * peer)
{
- struct PeerList *pos;
+ struct Peer *pos;
#if DEBUG_TOPOLOGY
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Core told us that we disconnected from `%s'\n",
GNUNET_i2s (peer));
#endif
- pos = find_peer (peer);
+ pos = GNUNET_CONTAINER_multihashmap_get (peers,
+ &peer->hashPubKey);
if (pos == NULL)
{
GNUNET_break (0);
}
if ( (connection_count < target_connection_count) ||
(friend_count < minimum_friend_count) )
- try_add_peers ();
+ GNUNET_CONTAINER_multihashmap_iterate (peers,
+ &try_add_peers,
+ NULL);
if (friend_count < minimum_friend_count)
{
/* disconnect from all non-friends */
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Not enough friendly connections, dropping all non-friend connections\n");
#endif
- drop_non_friends ();
+ GNUNET_CONTAINER_multihashmap_iterate (peers,
+ &drop_non_friends,
+ NULL);
}
}
/**
* We've gotten a HELLO from another peer. Consider it for
* advertising.
+ *
+ * @param hello the HELLO we got
*/
static void
consider_for_advertising (const struct GNUNET_HELLO_Message *hello)
{
int have_address;
struct GNUNET_PeerIdentity pid;
- struct PeerList *peer;
- struct PeerList *pos;
+ struct Peer *peer;
uint16_t size;
GNUNET_break (GNUNET_OK == GNUNET_HELLO_get_id (hello, &pid));
&have_address);
if (GNUNET_NO == have_address)
return; /* no point in advertising this one... */
- peer = find_peer (&pid);
+ peer = GNUNET_CONTAINER_multihashmap_get (peers,
+ &pid.hashPubKey);
if (peer == NULL)
peer = make_peer (&pid, hello, GNUNET_NO);
#if DEBUG_TOPOLOGY
setup_filter (peer);
/* since we have a new HELLO to pick from, re-schedule all
HELLO requests that are not bound by the HELLO send rate! */
- pos = peers;
- while (NULL != pos)
- {
- if (pos != peer)
- {
- if ( (pos->is_connected) &&
- (GNUNET_TIME_absolute_get_remaining (pos->next_hello_allowed).value <= HELLO_ADVERTISEMENT_MIN_FREQUENCY.value) )
- reschedule_hellos (pos);
- }
- pos = pos->next;
- }
+ GNUNET_CONTAINER_multihashmap_iterate (peers,
+ &reschedule_hellos,
+ peer);
}
/**
- * Peerinfo calls this function to let us know about a possible peer
+ * PEERINFO calls this function to let us know about a possible peer
* that we might want to connect to.
+ *
+ * @param cls closure (not used)
+ * @param peer potential peer to connect to
+ * @param hello HELLO for this peer (or NULL)
+ * @param trust how much we trust the peer (not used)
*/
static void
process_peer (void *cls,
const struct GNUNET_HELLO_Message *hello,
uint32_t trust)
{
- struct PeerList *pos;
+ struct Peer *pos;
GNUNET_assert (peer != NULL);
if (0 == memcmp (&my_identity,
if (hello == NULL)
{
/* free existing HELLO, if any */
- if (NULL != (pos = find_peer (peer)))
+ pos = GNUNET_CONTAINER_multihashmap_get (peers,
+ &peer->hashPubKey);
+ if (NULL != pos)
{
GNUNET_free_non_null (pos->hello);
pos->hello = NULL;
}
if ( (! pos->is_connected) &&
(! pos->is_friend) &&
- (0 == GNUNET_TIME_absolute_get_remaining (pos->blacklisted_until).value) )
- free_peer (pos);
+ (0 == GNUNET_TIME_absolute_get_remaining (pos->greylisted_until).value) )
+ free_peer (NULL, &pos->pid.hashPubKey, pos);
}
return;
}
consider_for_advertising (hello);
- pos = find_peer (peer);
+ pos = GNUNET_CONTAINER_multihashmap_get (peers,
+ &peer->hashPubKey);
if (pos == NULL)
pos = make_peer (peer, hello, GNUNET_NO);
GNUNET_assert (NULL != pos);
-#if DEBUG_TOPOLOGY
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Considering connecting to peer `%s'\n",
- GNUNET_i2s (peer));
-#endif
if (GNUNET_YES == pos->is_connected)
{
#if DEBUG_TOPOLOGY
#endif
return;
}
- if (GNUNET_TIME_absolute_get_remaining (pos->blacklisted_until).value > 0)
+ if (GNUNET_TIME_absolute_get_remaining (pos->greylisted_until).value > 0)
{
#if DEBUG_TOPOLOGY
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Already tried peer `%s' recently\n",
GNUNET_i2s (peer));
#endif
- return; /* peer still blacklisted */
+ return; /* peer still greylisted */
}
- if ( (GNUNET_YES == pos->is_friend) ||
- (GNUNET_YES != friends_only) ||
- (friend_count >= minimum_friend_count) )
- attempt_connect (pos);
-}
-
-
-/**
- * Discard peer entries for blacklisted peers
- * where the blacklisting has expired.
- */
-static void
-discard_old_blacklist_entries (void *cls,
- const struct GNUNET_SCHEDULER_TaskContext *tc)
-{
- struct PeerList *pos;
- struct PeerList *next;
-
- if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN))
- return;
- next = peers;
- while (NULL != (pos = next))
- {
- next = pos->next;
- if ( (GNUNET_NO == pos->is_friend) &&
- (GNUNET_NO == pos->is_connected) &&
- (GNUNET_NO == pos->is_blocked) &&
- (0 == GNUNET_TIME_absolute_get_remaining (pos->blacklisted_until).value) )
- free_peer (pos);
- }
- GNUNET_SCHEDULER_add_delayed (sched,
- BLACKLIST_AFTER_ATTEMPT,
- &discard_old_blacklist_entries,
- NULL);
+#if DEBUG_TOPOLOGY
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Considering connecting to peer `%s'\n",
+ GNUNET_i2s (peer));
+#endif
+ attempt_connect (pos);
}
"I am peer `%s'\n",
GNUNET_i2s (my_id));
#endif
- GNUNET_SCHEDULER_add_delayed (sched,
- BLACKLIST_AFTER_ATTEMPT,
- &discard_old_blacklist_entries,
- NULL);
peerinfo_notify = GNUNET_PEERINFO_notify (cfg, sched,
&process_peer,
NULL);
struct stat frstat;
struct GNUNET_CRYPTO_HashAsciiEncoded enc;
unsigned int entries_found;
- struct PeerList *fl;
+ struct Peer *fl;
if (GNUNET_OK !=
GNUNET_CONFIGURATION_get_value_filename (cfg,
GNUNET_YES);
GNUNET_log (GNUNET_ERROR_TYPE_INFO,
_("Found friend `%s' in configuration\n"),
- GNUNET_i2s (&fl->id));
+ GNUNET_i2s (&fl->pid));
}
else
{
struct GNUNET_TIME_Relative latency,
uint32_t distance)
{
+ struct Peer *peer;
+ struct GNUNET_PeerIdentity pid;
+
#if DEBUG_TOPOLOGY
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Received encrypted `%s' from peer `%s'",
"HELLO",
GNUNET_i2s (other));
#endif
+ if (GNUNET_OK !=
+ GNUNET_HELLO_get_id ((const struct GNUNET_HELLO_Message*) message,
+ &pid))
+ {
+ GNUNET_break_op (0);
+ return GNUNET_SYSERR;
+ }
GNUNET_STATISTICS_update (stats,
gettext_noop ("# HELLO messages received"),
1,
GNUNET_NO);
+ peer = GNUNET_CONTAINER_multihashmap_get (peers,
+ &pid.hashPubKey);
+ if ( (peer != NULL) &&
+ (peer->is_blocked) )
+ return GNUNET_OK; /* ignore: currently blocked */
+ if ( (GNUNET_YES == friends_only) &&
+ ( (peer == NULL) ||
+ (GNUNET_YES != peer->is_friend) ) )
+ return GNUNET_OK; /* ignore: not a friend */
if (transport != NULL)
GNUNET_TRANSPORT_offer_hello (transport,
message);
/**
* Function to fill send buffer with HELLO.
*
- * @param cls 'struct PeerList' of the target peer
+ * @param cls 'struct Peer' of the target peer
* @param size number of bytes available in buf
* @param buf where the callee should write the message
* @return number of bytes written to buf
size_t size,
void *buf)
{
- struct PeerList *pl = cls;
- struct PeerList *pos;
- struct PeerList *next;
- uint16_t want;
- size_t hs;
+ struct Peer *pl = cls;
+ struct FindAdvHelloContext fah;
+ size_t want;
pl->hello_req = NULL;
-#if DEBUG_TOPOLOGY
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Data solicited for `%s', considering sending `%s'",
- GNUNET_i2s (&pl->id),
- "HELLO");
-#endif
/* find applicable HELLOs */
- next = peers;
- while (NULL != (pos = next))
- {
- next = pos->next;
- if (pos->hello == NULL)
- continue;
- if (0 == GNUNET_TIME_absolute_get_remaining (pos->filter_expiration).value)
- {
- /* time to discard... */
- GNUNET_CONTAINER_bloomfilter_free (pos->filter);
- setup_filter (pos);
- }
- if (GNUNET_NO ==
- GNUNET_CONTAINER_bloomfilter_test (pos->filter,
- &pl->id.hashPubKey))
- break;
- }
+ fah.peer = pl;
+ fah.result = NULL;
+ fah.max_size = size;
+ fah.next_adv = GNUNET_TIME_UNIT_FOREVER_REL;
+ GNUNET_CONTAINER_multihashmap_iterate (peers,
+ &find_advertisable_hello,
+ &fah);
want = 0;
- if (pos != NULL)
+ if (fah.result != NULL)
{
- hs = GNUNET_HELLO_size (pos->hello);
- if (hs < size)
- {
- want = hs;
- memcpy (buf, pos->hello, want);
- GNUNET_CONTAINER_bloomfilter_add (pos->filter,
- &pl->id.hashPubKey);
+ want = GNUNET_HELLO_size (fah.result->hello);
+ GNUNET_assert (want <= size);
+ memcpy (buf, fah.result->hello, want);
+ GNUNET_CONTAINER_bloomfilter_add (fah.result->filter,
+ &pl->pid.hashPubKey);
#if DEBUG_TOPOLOGY
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Sending %u bytes of `%s's",
- (unsigned int) want,
- "HELLO");
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Sending `%s' with %u bytes",
+ "HELLO"
+ (unsigned int) want);
#endif
- GNUNET_STATISTICS_update (stats,
- gettext_noop ("# HELLO messages gossipped"),
- 1,
- GNUNET_NO);
- }
+ GNUNET_STATISTICS_update (stats,
+ gettext_noop ("# HELLO messages gossipped"),
+ 1,
+ GNUNET_NO);
}
pl->next_hello_allowed = GNUNET_TIME_relative_to_absolute (HELLO_ADVERTISEMENT_MIN_FREQUENCY);
pl->hello_delay_task
/**
* Last task run during shutdown. Disconnects us from
* the transport and core.
+ *
+ * @param cls unused, NULL
+ * @param tc scheduler context
*/
static void
-cleaning_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
+cleaning_task (void *cls,
+ const struct GNUNET_SCHEDULER_TaskContext *tc)
{
struct DisconnectList *dl;
}
GNUNET_TRANSPORT_disconnect (transport);
transport = NULL;
- while (NULL != peers)
- free_peer (peers);
+ GNUNET_CONTAINER_multihashmap_iterate (peers,
+ &free_peer,
+ NULL);
+ GNUNET_CONTAINER_multihashmap_destroy (peers);
if (handle != NULL)
{
GNUNET_CORE_disconnect (handle);
&opt))
opt = 16;
target_connection_count = (unsigned int) opt;
+ peers = GNUNET_CONTAINER_multihashmap_create (target_connection_count * 2);
if ( (friends_only == GNUNET_YES) ||
(minimum_friend_count > 0) )
projects / oweals / gnunet.git / commitdiff