#include "rps-test_util.h"
#include "gnunet-service-rps_sampler.h"
#include "gnunet-service-rps_custommap.h"
-#include "gnunet-service-rps_peers.h"
#include "gnunet-service-rps_view.h"
#include <math.h>
static struct GNUNET_PeerIdentity own_identity;
+
+/***********************************************************************
+ * Old gnunet-service-rps_peers.c
+***********************************************************************/
+
+/**
+ * Set a peer flag of given peer context.
+ */
+#define set_peer_flag(peer_ctx, mask) ((peer_ctx->peer_flags) |= (mask))
+
+/**
+ * Get peer flag of given peer context.
+ */
+#define check_peer_flag_set(peer_ctx, mask)\
+ ((peer_ctx->peer_flags) & (mask) ? GNUNET_YES : GNUNET_NO)
+
+/**
+ * Unset flag of given peer context.
+ */
+#define unset_peer_flag(peer_ctx, mask) ((peer_ctx->peer_flags) &= ~(mask))
+
+/**
+ * Set a channel flag of given channel context.
+ */
+#define set_channel_flag(channel_flags, mask) ((*channel_flags) |= (mask))
+
+/**
+ * Get channel flag of given channel context.
+ */
+#define check_channel_flag_set(channel_flags, mask)\
+ ((*channel_flags) & (mask) ? GNUNET_YES : GNUNET_NO)
+
+/**
+ * Unset flag of given channel context.
+ */
+#define unset_channel_flag(channel_flags, mask) ((*channel_flags) &= ~(mask))
+
+
+
+/**
+ * Pending operation on peer consisting of callback and closure
+ *
+ * When an operation cannot be executed right now this struct is used to store
+ * the callback and closure for later execution.
+ */
+struct PeerPendingOp
+{
+ /**
+ * Callback
+ */
+ PeerOp op;
+
+ /**
+ * Closure
+ */
+ void *op_cls;
+};
+
+/**
+ * List containing all messages that are yet to be send
+ *
+ * This is used to keep track of all messages that have not been sent yet. When
+ * a peer is to be removed the pending messages can be removed properly.
+ */
+struct PendingMessage
+{
+ /**
+ * DLL next, prev
+ */
+ struct PendingMessage *next;
+ struct PendingMessage *prev;
+
+ /**
+ * The envelope to the corresponding message
+ */
+ struct GNUNET_MQ_Envelope *ev;
+
+ /**
+ * The corresponding context
+ */
+ struct PeerContext *peer_ctx;
+
+ /**
+ * The message type
+ */
+ const char *type;
+};
+
+/**
+ * Struct used to keep track of other peer's status
+ *
+ * This is stored in a multipeermap.
+ * It contains information such as cadet channels, a message queue for sending,
+ * status about the channels, the pending operations on this peer and some flags
+ * about the status of the peer itself. (live, valid, ...)
+ */
+struct PeerContext
+{
+ /**
+ * Message queue open to client
+ */
+ struct GNUNET_MQ_Handle *mq;
+
+ /**
+ * Channel open to client.
+ */
+ struct GNUNET_CADET_Channel *send_channel;
+
+ /**
+ * Flags to the sending channel
+ */
+ uint32_t *send_channel_flags;
+
+ /**
+ * Channel open from client.
+ */
+ struct GNUNET_CADET_Channel *recv_channel; // unneeded?
+
+ /**
+ * Flags to the receiving channel
+ */
+ uint32_t *recv_channel_flags;
+
+ /**
+ * Array of pending operations on this peer.
+ */
+ struct PeerPendingOp *pending_ops;
+
+ /**
+ * Handle to the callback given to cadet_ntfy_tmt_rdy()
+ *
+ * To be canceled on shutdown.
+ */
+ struct PendingMessage *liveliness_check_pending;
+
+ /**
+ * Number of pending operations.
+ */
+ unsigned int num_pending_ops;
+
+ /**
+ * Identity of the peer
+ */
+ struct GNUNET_PeerIdentity peer_id;
+
+ /**
+ * Flags indicating status of peer
+ */
+ uint32_t peer_flags;
+
+ /**
+ * Last time we received something from that peer.
+ */
+ struct GNUNET_TIME_Absolute last_message_recv;
+
+ /**
+ * Last time we received a keepalive message.
+ */
+ struct GNUNET_TIME_Absolute last_keepalive;
+
+ /**
+ * DLL with all messages that are yet to be sent
+ */
+ struct PendingMessage *pending_messages_head;
+ struct PendingMessage *pending_messages_tail;
+
+ /**
+ * This is pobably followed by 'statistical' data (when we first saw
+ * him, how did we get his ID, how many pushes (in a timeinterval),
+ * ...)
+ */
+};
+
+/**
+ * @brief Closure to #valid_peer_iterator
+ */
+struct PeersIteratorCls
+{
+ /**
+ * Iterator function
+ */
+ PeersIterator iterator;
+
+ /**
+ * Closure to iterator
+ */
+ void *cls;
+};
+
+/**
+ * @brief Hashmap of valid peers.
+ */
+static struct GNUNET_CONTAINER_MultiPeerMap *valid_peers;
+
+/**
+ * @brief Maximum number of valid peers to keep.
+ * TODO read from config
+ */
+static uint32_t num_valid_peers_max = UINT32_MAX;
+
+/**
+ * @brief Filename of the file that stores the valid peers persistently.
+ */
+static char *filename_valid_peers;
+
+/**
+ * Set of all peers to keep track of them.
+ */
+static struct GNUNET_CONTAINER_MultiPeerMap *peer_map;
+
+/**
+ * Cadet handle.
+ */
+static struct GNUNET_CADET_Handle *cadet_handle;
+
+
+
+/**
+ * @brief Get the #PeerContext associated with a peer
+ *
+ * @param peer the peer id
+ *
+ * @return the #PeerContext
+ */
+static struct PeerContext *
+get_peer_ctx (const struct GNUNET_PeerIdentity *peer)
+{
+ struct PeerContext *ctx;
+ int ret;
+
+ ret = GNUNET_CONTAINER_multipeermap_contains (peer_map, peer);
+ GNUNET_assert (GNUNET_YES == ret);
+ ctx = GNUNET_CONTAINER_multipeermap_get (peer_map, peer);
+ GNUNET_assert (NULL != ctx);
+ return ctx;
+}
+
+int
+Peers_check_peer_known (const struct GNUNET_PeerIdentity *peer);
+
+/**
+ * @brief Create a new #PeerContext and insert it into the peer map
+ *
+ * @param peer the peer to create the #PeerContext for
+ *
+ * @return the #PeerContext
+ */
+static struct PeerContext *
+create_peer_ctx (const struct GNUNET_PeerIdentity *peer)
+{
+ struct PeerContext *ctx;
+ int ret;
+
+ GNUNET_assert (GNUNET_NO == Peers_check_peer_known (peer));
+
+ ctx = GNUNET_new (struct PeerContext);
+ ctx->peer_id = *peer;
+ ctx->send_channel_flags = GNUNET_new (uint32_t);
+ ctx->recv_channel_flags = GNUNET_new (uint32_t);
+ ret = GNUNET_CONTAINER_multipeermap_put (peer_map, peer, ctx,
+ GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
+ GNUNET_assert (GNUNET_OK == ret);
+ return ctx;
+}
+
+
+/**
+ * @brief Create or get a #PeerContext
+ *
+ * @param peer the peer to get the associated context to
+ *
+ * @return the context
+ */
+static struct PeerContext *
+create_or_get_peer_ctx (const struct GNUNET_PeerIdentity *peer)
+{
+ if (GNUNET_NO == Peers_check_peer_known (peer))
+ {
+ return create_peer_ctx (peer);
+ }
+ return get_peer_ctx (peer);
+}
+
+void
+Peers_unset_peer_flag (const struct GNUNET_PeerIdentity *peer, enum Peers_PeerFlags flags);
+
+void
+Peers_set_peer_flag (const struct GNUNET_PeerIdentity *peer, enum Peers_PeerFlags flags);
+
+/**
+ * @brief Check whether we have a connection to this @a peer
+ *
+ * Also sets the #Peers_ONLINE flag accordingly
+ *
+ * @param peer the peer in question
+ *
+ * @return #GNUNET_YES if we are connected
+ * #GNUNET_NO otherwise
+ */
+int
+Peers_check_connected (const struct GNUNET_PeerIdentity *peer)
+{
+ const struct PeerContext *peer_ctx;
+
+ /* If we don't know about this peer we don't know whether it's online */
+ if (GNUNET_NO == Peers_check_peer_known (peer))
+ {
+ return GNUNET_NO;
+ }
+ /* Get the context */
+ peer_ctx = get_peer_ctx (peer);
+ /* If we have no channel to this peer we don't know whether it's online */
+ if ( (NULL == peer_ctx->send_channel) &&
+ (NULL == peer_ctx->recv_channel) )
+ {
+ Peers_unset_peer_flag (peer, Peers_ONLINE);
+ return GNUNET_NO;
+ }
+ /* Otherwise (if we have a channel, we know that it's online */
+ Peers_set_peer_flag (peer, Peers_ONLINE);
+ return GNUNET_YES;
+}
+
+
+/**
+ * @brief The closure to #get_rand_peer_iterator.
+ */
+struct GetRandPeerIteratorCls
+{
+ /**
+ * @brief The index of the peer to return.
+ * Will be decreased until 0.
+ * Then current peer is returned.
+ */
+ uint32_t index;
+
+ /**
+ * @brief Pointer to peer to return.
+ */
+ const struct GNUNET_PeerIdentity *peer;
+};
+
+
+/**
+ * @brief Iterator function for #get_random_peer_from_peermap.
+ *
+ * Implements #GNUNET_CONTAINER_PeerMapIterator.
+ * Decreases the index until the index is null.
+ * Then returns the current peer.
+ *
+ * @param cls the #GetRandPeerIteratorCls containing index and peer
+ * @param peer current peer
+ * @param value unused
+ *
+ * @return #GNUNET_YES if we should continue to
+ * iterate,
+ * #GNUNET_NO if not.
+ */
+static int
+get_rand_peer_iterator (void *cls,
+ const struct GNUNET_PeerIdentity *peer,
+ void *value)
+{
+ struct GetRandPeerIteratorCls *iterator_cls = cls;
+ if (0 >= iterator_cls->index)
+ {
+ iterator_cls->peer = peer;
+ return GNUNET_NO;
+ }
+ iterator_cls->index--;
+ return GNUNET_YES;
+}
+
+
+/**
+ * @brief Get a random peer from @a peer_map
+ *
+ * @param peer_map the peer_map to get the peer from
+ *
+ * @return a random peer
+ */
+static const struct GNUNET_PeerIdentity *
+get_random_peer_from_peermap (const struct
+ GNUNET_CONTAINER_MultiPeerMap *peer_map)
+{
+ struct GetRandPeerIteratorCls *iterator_cls;
+ const struct GNUNET_PeerIdentity *ret;
+
+ iterator_cls = GNUNET_new (struct GetRandPeerIteratorCls);
+ iterator_cls->index = GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK,
+ GNUNET_CONTAINER_multipeermap_size (peer_map));
+ (void) GNUNET_CONTAINER_multipeermap_iterate (valid_peers,
+ get_rand_peer_iterator,
+ iterator_cls);
+ ret = iterator_cls->peer;
+ GNUNET_free (iterator_cls);
+ return ret;
+}
+
+
+/**
+ * @brief Add a given @a peer to valid peers.
+ *
+ * If valid peers are already #num_valid_peers_max, delete a peer previously.
+ *
+ * @param peer the peer that is added to the valid peers.
+ *
+ * @return #GNUNET_YES if no other peer had to be removed
+ * #GNUNET_NO otherwise
+ */
+static int
+add_valid_peer (const struct GNUNET_PeerIdentity *peer)
+{
+ const struct GNUNET_PeerIdentity *rand_peer;
+ int ret;
+
+ ret = GNUNET_YES;
+ while (GNUNET_CONTAINER_multipeermap_size (valid_peers) >= num_valid_peers_max)
+ {
+ rand_peer = get_random_peer_from_peermap (valid_peers);
+ GNUNET_CONTAINER_multipeermap_remove_all (valid_peers, rand_peer);
+ ret = GNUNET_NO;
+ }
+ (void) GNUNET_CONTAINER_multipeermap_put (valid_peers, peer, NULL,
+ GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY);
+ return ret;
+}
+
+
+/**
+ * @brief Set the peer flag to living and
+ * call the pending operations on this peer.
+ *
+ * Also adds peer to #valid_peers.
+ *
+ * @param peer_ctx the #PeerContext of the peer to set live
+ */
+static void
+set_peer_live (struct PeerContext *peer_ctx)
+{
+ struct GNUNET_PeerIdentity *peer;
+ unsigned int i;
+
+ peer = &peer_ctx->peer_id;
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Peer %s is live and valid, calling %i pending operations on it\n",
+ GNUNET_i2s (peer),
+ peer_ctx->num_pending_ops);
+
+ if (NULL != peer_ctx->liveliness_check_pending)
+ {
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Removing pending liveliness check for peer %s\n",
+ GNUNET_i2s (&peer_ctx->peer_id));
+ // TODO wait until cadet sets mq->cancel_impl
+ //GNUNET_MQ_send_cancel (peer_ctx->liveliness_check_pending->ev);
+ GNUNET_free (peer_ctx->liveliness_check_pending);
+ peer_ctx->liveliness_check_pending = NULL;
+ }
+
+ (void) add_valid_peer (peer);
+ set_peer_flag (peer_ctx, Peers_ONLINE);
+
+ /* Call pending operations */
+ for (i = 0; i < peer_ctx->num_pending_ops; i++)
+ {
+ peer_ctx->pending_ops[i].op (peer_ctx->pending_ops[i].op_cls, peer);
+ }
+ GNUNET_array_grow (peer_ctx->pending_ops, peer_ctx->num_pending_ops, 0);
+}
+
+static void
+cleanup_destroyed_channel (void *cls,
+ const struct GNUNET_CADET_Channel *channel);
+
+/* Declaration of handlers */
+static void
+handle_peer_check (void *cls,
+ const struct GNUNET_MessageHeader *msg);
+
+static void
+handle_peer_push (void *cls,
+ const struct GNUNET_MessageHeader *msg);
+
+static void
+handle_peer_pull_request (void *cls,
+ const struct GNUNET_MessageHeader *msg);
+
+static int
+check_peer_pull_reply (void *cls,
+ const struct GNUNET_RPS_P2P_PullReplyMessage *msg);
+
+static void
+handle_peer_pull_reply (void *cls,
+ const struct GNUNET_RPS_P2P_PullReplyMessage *msg);
+
+/* End declaration of handlers */
+
+
+/**
+ * @brief Get the channel of a peer. If not existing, create.
+ *
+ * @param peer the peer id
+ * @return the #GNUNET_CADET_Channel used to send data to @a peer
+ */
+struct GNUNET_CADET_Channel *
+get_channel (const struct GNUNET_PeerIdentity *peer)
+{
+ struct PeerContext *peer_ctx;
+ struct GNUNET_HashCode port;
+ /* There exists a copy-paste-clone in run() */
+ struct GNUNET_MQ_MessageHandler cadet_handlers[] = {
+ GNUNET_MQ_hd_fixed_size (peer_check,
+ GNUNET_MESSAGE_TYPE_RPS_PP_CHECK_LIVE,
+ struct GNUNET_MessageHeader,
+ NULL),
+ GNUNET_MQ_hd_fixed_size (peer_push,
+ GNUNET_MESSAGE_TYPE_RPS_PP_PUSH,
+ struct GNUNET_MessageHeader,
+ NULL),
+ GNUNET_MQ_hd_fixed_size (peer_pull_request,
+ GNUNET_MESSAGE_TYPE_RPS_PP_PULL_REQUEST,
+ struct GNUNET_MessageHeader,
+ NULL),
+ GNUNET_MQ_hd_var_size (peer_pull_reply,
+ GNUNET_MESSAGE_TYPE_RPS_PP_PULL_REPLY,
+ struct GNUNET_RPS_P2P_PullReplyMessage,
+ NULL),
+ GNUNET_MQ_handler_end ()
+ };
+
+
+ peer_ctx = get_peer_ctx (peer);
+ if (NULL == peer_ctx->send_channel)
+ {
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Trying to establish channel to peer %s\n",
+ GNUNET_i2s (peer));
+ GNUNET_CRYPTO_hash (GNUNET_APPLICATION_PORT_RPS,
+ strlen (GNUNET_APPLICATION_PORT_RPS),
+ &port);
+ peer_ctx->send_channel =
+ GNUNET_CADET_channel_create (cadet_handle,
+ (struct GNUNET_PeerIdentity *) peer, /* context */
+ peer,
+ &port,
+ GNUNET_CADET_OPTION_RELIABLE,
+ NULL, /* WindowSize handler */
+ cleanup_destroyed_channel, /* Disconnect handler */
+ cadet_handlers);
+ }
+ GNUNET_assert (NULL != peer_ctx->send_channel);
+ return peer_ctx->send_channel;
+}
+
+
+/**
+ * Get the message queue (#GNUNET_MQ_Handle) of a specific peer.
+ *
+ * If we already have a message queue open to this client,
+ * simply return it, otherways create one.
+ *
+ * @param peer the peer to get the mq to
+ * @return the #GNUNET_MQ_Handle
+ */
+static struct GNUNET_MQ_Handle *
+get_mq (const struct GNUNET_PeerIdentity *peer)
+{
+ struct PeerContext *peer_ctx;
+
+ peer_ctx = get_peer_ctx (peer);
+
+ if (NULL == peer_ctx->mq)
+ {
+ (void) get_channel (peer);
+ peer_ctx->mq = GNUNET_CADET_get_mq (peer_ctx->send_channel);
+ }
+ return peer_ctx->mq;
+}
+
+
+/**
+ * @brief This is called in response to the first message we sent as a
+ * liveliness check.
+ *
+ * @param cls #PeerContext of peer with pending liveliness check
+ */
+static void
+mq_liveliness_check_successful (void *cls)
+{
+ struct PeerContext *peer_ctx = cls;
+
+ if (NULL != peer_ctx->liveliness_check_pending)
+ {
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Liveliness check for peer %s was successfull\n",
+ GNUNET_i2s (&peer_ctx->peer_id));
+ GNUNET_free (peer_ctx->liveliness_check_pending);
+ peer_ctx->liveliness_check_pending = NULL;
+ set_peer_live (peer_ctx);
+ }
+}
+
+/**
+ * Issue a check whether peer is live
+ *
+ * @param peer_ctx the context of the peer
+ */
+static void
+check_peer_live (struct PeerContext *peer_ctx)
+{
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Get informed about peer %s getting live\n",
+ GNUNET_i2s (&peer_ctx->peer_id));
+
+ struct GNUNET_MQ_Handle *mq;
+ struct GNUNET_MQ_Envelope *ev;
+
+ ev = GNUNET_MQ_msg_header (GNUNET_MESSAGE_TYPE_RPS_PP_CHECK_LIVE);
+ peer_ctx->liveliness_check_pending = GNUNET_new (struct PendingMessage);
+ peer_ctx->liveliness_check_pending->ev = ev;
+ peer_ctx->liveliness_check_pending->peer_ctx = peer_ctx;
+ peer_ctx->liveliness_check_pending->type = "Check liveliness";
+ mq = get_mq (&peer_ctx->peer_id);
+ GNUNET_MQ_notify_sent (ev,
+ mq_liveliness_check_successful,
+ peer_ctx);
+ GNUNET_MQ_send (mq, ev);
+}
+
+/**
+ * @brief Add an envelope to a message passed to mq to list of pending messages
+ *
+ * @param peer peer the message was sent to
+ * @param ev envelope to the message
+ * @param type type of the message to be sent
+ * @return pointer to pending message
+ */
+static struct PendingMessage *
+insert_pending_message (const struct GNUNET_PeerIdentity *peer,
+ struct GNUNET_MQ_Envelope *ev,
+ const char *type)
+{
+ struct PendingMessage *pending_msg;
+ struct PeerContext *peer_ctx;
+
+ peer_ctx = get_peer_ctx (peer);
+ pending_msg = GNUNET_new (struct PendingMessage);
+ pending_msg->ev = ev;
+ pending_msg->peer_ctx = peer_ctx;
+ pending_msg->type = type;
+ GNUNET_CONTAINER_DLL_insert (peer_ctx->pending_messages_head,
+ peer_ctx->pending_messages_tail,
+ pending_msg);
+ return pending_msg;
+}
+
+
+/**
+ * @brief Remove a pending message from the respective DLL
+ *
+ * @param pending_msg the pending message to remove
+ * @param cancel cancel the pending message, too
+ */
+static void
+remove_pending_message (struct PendingMessage *pending_msg, int cancel)
+{
+ struct PeerContext *peer_ctx;
+
+ peer_ctx = pending_msg->peer_ctx;
+ GNUNET_assert (NULL != peer_ctx);
+ GNUNET_CONTAINER_DLL_remove (peer_ctx->pending_messages_head,
+ peer_ctx->pending_messages_tail,
+ pending_msg);
+ // TODO wait for the cadet implementation of message cancellation
+ //if (GNUNET_YES == cancel)
+ //{
+ // GNUNET_MQ_send_cancel (pending_msg->ev);
+ //}
+ GNUNET_free (pending_msg);
+}
+
+
+/**
+ * @brief Check whether function of type #PeerOp was already scheduled
+ *
+ * The array with pending operations will probably never grow really big, so
+ * iterating over it should be ok.
+ *
+ * @param peer the peer to check
+ * @param peer_op the operation (#PeerOp) on the peer
+ *
+ * @return #GNUNET_YES if this operation is scheduled on that peer
+ * #GNUNET_NO otherwise
+ */
+static int
+check_operation_scheduled (const struct GNUNET_PeerIdentity *peer,
+ const PeerOp peer_op)
+{
+ const struct PeerContext *peer_ctx;
+ unsigned int i;
+
+ peer_ctx = get_peer_ctx (peer);
+ for (i = 0; i < peer_ctx->num_pending_ops; i++)
+ if (peer_op == peer_ctx->pending_ops[i].op)
+ return GNUNET_YES;
+ return GNUNET_NO;
+}
+
+int
+Peers_remove_peer (const struct GNUNET_PeerIdentity *peer);
+
+/**
+ * Iterator over hash map entries. Deletes all contexts of peers.
+ *
+ * @param cls closure
+ * @param key current public key
+ * @param value value in the hash map
+ * @return #GNUNET_YES if we should continue to iterate,
+ * #GNUNET_NO if not.
+ */
+static int
+peermap_clear_iterator (void *cls,
+ const struct GNUNET_PeerIdentity *key,
+ void *value)
+{
+ Peers_remove_peer (key);
+ return GNUNET_YES;
+}
+
+
+/**
+ * @brief This is called once a message is sent.
+ *
+ * Removes the pending message
+ *
+ * @param cls type of the message that was sent
+ */
+static void
+mq_notify_sent_cb (void *cls)
+{
+ struct PendingMessage *pending_msg = (struct PendingMessage *) cls;
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "%s was sent.\n",
+ pending_msg->type);
+ /* Do not cancle message */
+ remove_pending_message (pending_msg, GNUNET_NO);
+}
+
+
+/**
+ * @brief Iterator function for #store_valid_peers.
+ *
+ * Implements #GNUNET_CONTAINER_PeerMapIterator.
+ * Writes single peer to disk.
+ *
+ * @param cls the file handle to write to.
+ * @param peer current peer
+ * @param value unused
+ *
+ * @return #GNUNET_YES if we should continue to
+ * iterate,
+ * #GNUNET_NO if not.
+ */
+static int
+store_peer_presistently_iterator (void *cls,
+ const struct GNUNET_PeerIdentity *peer,
+ void *value)
+{
+ const struct GNUNET_DISK_FileHandle *fh = cls;
+ char peer_string[128];
+ int size;
+ ssize_t ret;
+
+ if (NULL == peer)
+ {
+ return GNUNET_YES;
+ }
+ size = GNUNET_snprintf (peer_string,
+ sizeof (peer_string),
+ "%s\n",
+ GNUNET_i2s_full (peer));
+ GNUNET_assert (53 == size);
+ ret = GNUNET_DISK_file_write (fh,
+ peer_string,
+ size);
+ GNUNET_assert (size == ret);
+ return GNUNET_YES;
+}
+
+
+/**
+ * @brief Store the peers currently in #valid_peers to disk.
+ */
+static void
+store_valid_peers ()
+{
+ struct GNUNET_DISK_FileHandle *fh;
+ uint32_t number_written_peers;
+ int ret;
+
+ if (0 == strncmp ("DISABLE", filename_valid_peers, 7))
+ {
+ return;
+ }
+
+ ret = GNUNET_DISK_directory_create_for_file (filename_valid_peers);
+ if (GNUNET_SYSERR == ret)
+ {
+ LOG (GNUNET_ERROR_TYPE_WARNING,
+ "Not able to create directory for file `%s'\n",
+ filename_valid_peers);
+ GNUNET_break (0);
+ }
+ else if (GNUNET_NO == ret)
+ {
+ LOG (GNUNET_ERROR_TYPE_WARNING,
+ "Directory for file `%s' exists but is not writable for us\n",
+ filename_valid_peers);
+ GNUNET_break (0);
+ }
+ fh = GNUNET_DISK_file_open (filename_valid_peers,
+ GNUNET_DISK_OPEN_WRITE |
+ GNUNET_DISK_OPEN_CREATE,
+ GNUNET_DISK_PERM_USER_READ |
+ GNUNET_DISK_PERM_USER_WRITE);
+ if (NULL == fh)
+ {
+ LOG (GNUNET_ERROR_TYPE_WARNING,
+ "Not able to write valid peers to file `%s'\n",
+ filename_valid_peers);
+ return;
+ }
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Writing %u valid peers to disk\n",
+ GNUNET_CONTAINER_multipeermap_size (valid_peers));
+ number_written_peers =
+ GNUNET_CONTAINER_multipeermap_iterate (valid_peers,
+ store_peer_presistently_iterator,
+ fh);
+ GNUNET_assert (GNUNET_OK == GNUNET_DISK_file_close (fh));
+ GNUNET_assert (number_written_peers ==
+ GNUNET_CONTAINER_multipeermap_size (valid_peers));
+}
+
+
+/**
+ * @brief Convert string representation of peer id to peer id.
+ *
+ * Counterpart to #GNUNET_i2s_full.
+ *
+ * @param string_repr The string representation of the peer id
+ *
+ * @return The peer id
+ */
+static const struct GNUNET_PeerIdentity *
+s2i_full (const char *string_repr)
+{
+ struct GNUNET_PeerIdentity *peer;
+ size_t len;
+ int ret;
+
+ peer = GNUNET_new (struct GNUNET_PeerIdentity);
+ len = strlen (string_repr);
+ if (52 > len)
+ {
+ LOG (GNUNET_ERROR_TYPE_WARNING,
+ "Not able to convert string representation of PeerID to PeerID\n"
+ "Sting representation: %s (len %lu) - too short\n",
+ string_repr,
+ len);
+ GNUNET_break (0);
+ }
+ else if (52 < len)
+ {
+ len = 52;
+ }
+ ret = GNUNET_CRYPTO_eddsa_public_key_from_string (string_repr,
+ len,
+ &peer->public_key);
+ if (GNUNET_OK != ret)
+ {
+ LOG (GNUNET_ERROR_TYPE_WARNING,
+ "Not able to convert string representation of PeerID to PeerID\n"
+ "Sting representation: %s\n",
+ string_repr);
+ GNUNET_break (0);
+ }
+ return peer;
+}
+
+
+/**
+ * @brief Restore the peers on disk to #valid_peers.
+ */
+static void
+restore_valid_peers ()
+{
+ off_t file_size;
+ uint32_t num_peers;
+ struct GNUNET_DISK_FileHandle *fh;
+ char *buf;
+ ssize_t size_read;
+ char *iter_buf;
+ char *str_repr;
+ const struct GNUNET_PeerIdentity *peer;
+
+ if (0 == strncmp ("DISABLE", filename_valid_peers, 7))
+ {
+ return;
+ }
+
+ if (GNUNET_OK != GNUNET_DISK_file_test (filename_valid_peers))
+ {
+ return;
+ }
+ fh = GNUNET_DISK_file_open (filename_valid_peers,
+ GNUNET_DISK_OPEN_READ,
+ GNUNET_DISK_PERM_NONE);
+ GNUNET_assert (NULL != fh);
+ GNUNET_assert (GNUNET_OK == GNUNET_DISK_file_handle_size (fh, &file_size));
+ num_peers = file_size / 53;
+ buf = GNUNET_malloc (file_size);
+ size_read = GNUNET_DISK_file_read (fh, buf, file_size);
+ GNUNET_assert (size_read == file_size);
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Restoring %" PRIu32 " peers from file `%s'\n",
+ num_peers,
+ filename_valid_peers);
+ for (iter_buf = buf; iter_buf < buf + file_size - 1; iter_buf += 53)
+ {
+ str_repr = GNUNET_strndup (iter_buf, 53);
+ peer = s2i_full (str_repr);
+ GNUNET_free (str_repr);
+ add_valid_peer (peer);
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Restored valid peer %s from disk\n",
+ GNUNET_i2s_full (peer));
+ }
+ iter_buf = NULL;
+ GNUNET_free (buf);
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "num_peers: %" PRIu32 ", _size (valid_peers): %u\n",
+ num_peers,
+ GNUNET_CONTAINER_multipeermap_size (valid_peers));
+ if (num_peers != GNUNET_CONTAINER_multipeermap_size (valid_peers))
+ {
+ LOG (GNUNET_ERROR_TYPE_WARNING,
+ "Number of restored peers does not match file size. Have probably duplicates.\n");
+ }
+ GNUNET_assert (GNUNET_OK == GNUNET_DISK_file_close (fh));
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Restored %u valid peers from disk\n",
+ GNUNET_CONTAINER_multipeermap_size (valid_peers));
+}
+
+
+/**
+ * @brief Initialise storage of peers
+ *
+ * @param fn_valid_peers filename of the file used to store valid peer ids
+ * @param cadet_h cadet handle
+ * @param disconnect_handler Disconnect handler
+ * @param own_id own peer identity
+ */
+void
+Peers_initialise (char* fn_valid_peers,
+ struct GNUNET_CADET_Handle *cadet_h,
+ GNUNET_CADET_DisconnectEventHandler disconnect_handler,
+ const struct GNUNET_PeerIdentity *own_id)
+{
+ filename_valid_peers = GNUNET_strdup (fn_valid_peers);
+ cadet_handle = cadet_h;
+ own_identity = *own_id;
+ peer_map = GNUNET_CONTAINER_multipeermap_create (4, GNUNET_NO);
+ valid_peers = GNUNET_CONTAINER_multipeermap_create (4, GNUNET_NO);
+ restore_valid_peers ();
+}
+
+
+/**
+ * @brief Delete storage of peers that was created with #Peers_initialise ()
+ */
+void
+Peers_terminate ()
+{
+ if (GNUNET_SYSERR ==
+ GNUNET_CONTAINER_multipeermap_iterate (peer_map,
+ peermap_clear_iterator,
+ NULL))
+ {
+ LOG (GNUNET_ERROR_TYPE_WARNING,
+ "Iteration destroying peers was aborted.\n");
+ }
+ GNUNET_CONTAINER_multipeermap_destroy (peer_map);
+ store_valid_peers ();
+ GNUNET_free (filename_valid_peers);
+ GNUNET_CONTAINER_multipeermap_destroy (valid_peers);
+}
+
+
+/**
+ * Iterator over #valid_peers hash map entries.
+ *
+ * @param cls closure - unused
+ * @param peer current peer id
+ * @param value value in the hash map - unused
+ * @return #GNUNET_YES if we should continue to
+ * iterate,
+ * #GNUNET_NO if not.
+ */
+static int
+valid_peer_iterator (void *cls,
+ const struct GNUNET_PeerIdentity *peer,
+ void *value)
+{
+ struct PeersIteratorCls *it_cls = cls;
+
+ return it_cls->iterator (it_cls->cls,
+ peer);
+}
+
+
+/**
+ * @brief Get all currently known, valid peer ids.
+ *
+ * @param it function to call on each peer id
+ * @param it_cls extra argument to @a it
+ * @return the number of key value pairs processed,
+ * #GNUNET_SYSERR if it aborted iteration
+ */
+int
+Peers_get_valid_peers (PeersIterator iterator,
+ void *it_cls)
+{
+ struct PeersIteratorCls *cls;
+ int ret;
+
+ cls = GNUNET_new (struct PeersIteratorCls);
+ cls->iterator = iterator;
+ cls->cls = it_cls;
+ ret = GNUNET_CONTAINER_multipeermap_iterate (valid_peers,
+ valid_peer_iterator,
+ cls);
+ GNUNET_free (cls);
+ return ret;
+}
+
+
+/**
+ * @brief Add peer to known peers.
+ *
+ * This function is called on new peer_ids from 'external' sources
+ * (client seed, cadet get_peers(), ...)
+ *
+ * @param peer the new #GNUNET_PeerIdentity
+ *
+ * @return #GNUNET_YES if peer was inserted
+ * #GNUNET_NO otherwise (if peer was already known or
+ * peer was #own_identity)
+ */
+int
+Peers_insert_peer (const struct GNUNET_PeerIdentity *peer)
+{
+ if ( (GNUNET_YES == Peers_check_peer_known (peer)) ||
+ (0 == GNUNET_CRYPTO_cmp_peer_identity (peer, &own_identity)) )
+ {
+ return GNUNET_NO; /* We already know this peer - nothing to do */
+ }
+ (void) create_peer_ctx (peer);
+ return GNUNET_YES;
+}
+
+int
+Peers_check_peer_flag (const struct GNUNET_PeerIdentity *peer, enum Peers_PeerFlags flags);
+
+/**
+ * @brief Try connecting to a peer to see whether it is online
+ *
+ * If not known yet, insert into known peers
+ *
+ * @param peer the peer whose liveliness is to be checked
+ * @return #GNUNET_YES if peer had to be inserted
+ * #GNUNET_NO otherwise (if peer was already known or
+ * peer was #own_identity)
+ */
+int
+Peers_issue_peer_liveliness_check (const struct GNUNET_PeerIdentity *peer)
+{
+ struct PeerContext *peer_ctx;
+ int ret;
+
+ if (0 == GNUNET_CRYPTO_cmp_peer_identity (peer, &own_identity))
+ {
+ return GNUNET_NO;
+ }
+ ret = Peers_insert_peer (peer);
+ peer_ctx = get_peer_ctx (peer);
+ if (GNUNET_NO == Peers_check_peer_flag (peer, Peers_ONLINE))
+ {
+ check_peer_live (peer_ctx);
+ }
+ return ret;
+}
+
+
+/**
+ * @brief Check if peer is removable.
+ *
+ * Check if
+ * - a recv channel exists
+ * - there are pending messages
+ * - there is no pending pull reply
+ *
+ * @param peer the peer in question
+ * @return #GNUNET_YES if peer is removable
+ * #GNUNET_NO if peer is NOT removable
+ * #GNUNET_SYSERR if peer is not known
+ */
+int
+Peers_check_removable (const struct GNUNET_PeerIdentity *peer)
+{
+ struct PeerContext *peer_ctx;
+
+ if (GNUNET_NO == GNUNET_CONTAINER_multipeermap_contains (peer_map, peer))
+ {
+ return GNUNET_SYSERR;
+ }
+
+ peer_ctx = get_peer_ctx (peer);
+ if ( (NULL != peer_ctx->recv_channel) ||
+ (NULL != peer_ctx->pending_messages_head) ||
+ (GNUNET_NO == check_peer_flag_set (peer_ctx, Peers_PULL_REPLY_PENDING)) )
+ {
+ return GNUNET_NO;
+ }
+ return GNUNET_YES;
+}
+
+uint32_t *
+Peers_get_channel_flag (const struct GNUNET_PeerIdentity *peer,
+ enum Peers_ChannelRole role);
+
+int
+Peers_check_channel_flag (uint32_t *channel_flags, enum Peers_ChannelFlags flags);
+
+/**
+ * @brief Remove peer
+ *
+ * @param peer the peer to clean
+ * @return #GNUNET_YES if peer was removed
+ * #GNUNET_NO otherwise
+ */
+int
+Peers_remove_peer (const struct GNUNET_PeerIdentity *peer)
+{
+ struct PeerContext *peer_ctx;
+ uint32_t *channel_flag;
+
+ if (GNUNET_NO == GNUNET_CONTAINER_multipeermap_contains (peer_map, peer))
+ {
+ return GNUNET_NO;
+ }
+
+ peer_ctx = get_peer_ctx (peer);
+ set_peer_flag (peer_ctx, Peers_TO_DESTROY);
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Going to remove peer %s\n",
+ GNUNET_i2s (&peer_ctx->peer_id));
+ Peers_unset_peer_flag (peer, Peers_ONLINE);
+
+ GNUNET_array_grow (peer_ctx->pending_ops, peer_ctx->num_pending_ops, 0);
+ while (NULL != peer_ctx->pending_messages_head)
+ {
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Removing unsent %s\n",
+ peer_ctx->pending_messages_head->type);
+ /* Cancle pending message, too */
+ remove_pending_message (peer_ctx->pending_messages_head, GNUNET_YES);
+ }
+ /* If we are still waiting for notification whether this peer is live
+ * cancel the according task */
+ if (NULL != peer_ctx->liveliness_check_pending)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Removing pending liveliness check for peer %s\n",
+ GNUNET_i2s (&peer_ctx->peer_id));
+ // TODO wait until cadet sets mq->cancel_impl
+ //GNUNET_MQ_send_cancel (peer_ctx->liveliness_check_pending->ev);
+ GNUNET_free (peer_ctx->liveliness_check_pending);
+ peer_ctx->liveliness_check_pending = NULL;
+ }
+ channel_flag = Peers_get_channel_flag (peer, Peers_CHANNEL_ROLE_SENDING);
+ if (NULL != peer_ctx->send_channel &&
+ GNUNET_YES != Peers_check_channel_flag (channel_flag, Peers_CHANNEL_DESTROING))
+ {
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Destroying send channel\n");
+ GNUNET_CADET_channel_destroy (peer_ctx->send_channel);
+ peer_ctx->send_channel = NULL;
+ }
+ channel_flag = Peers_get_channel_flag (peer, Peers_CHANNEL_ROLE_RECEIVING);
+ if (NULL != peer_ctx->recv_channel &&
+ GNUNET_YES != Peers_check_channel_flag (channel_flag, Peers_CHANNEL_DESTROING))
+ {
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Destroying recv channel\n");
+ GNUNET_CADET_channel_destroy (peer_ctx->recv_channel);
+ peer_ctx->recv_channel = NULL;
+ }
+
+ GNUNET_free (peer_ctx->send_channel_flags);
+ GNUNET_free (peer_ctx->recv_channel_flags);
+
+ if (GNUNET_YES != GNUNET_CONTAINER_multipeermap_remove_all (peer_map, &peer_ctx->peer_id))
+ {
+ LOG (GNUNET_ERROR_TYPE_WARNING, "removing peer from peer_map failed\n");
+ }
+ GNUNET_free (peer_ctx);
+ return GNUNET_YES;
+}
+
+
+/**
+ * @brief set flags on a given peer.
+ *
+ * @param peer the peer to set flags on
+ * @param flags the flags
+ */
+void
+Peers_set_peer_flag (const struct GNUNET_PeerIdentity *peer, enum Peers_PeerFlags flags)
+{
+ struct PeerContext *peer_ctx;
+
+ peer_ctx = get_peer_ctx (peer);
+ set_peer_flag (peer_ctx, flags);
+}
+
+
+/**
+ * @brief unset flags on a given peer.
+ *
+ * @param peer the peer to unset flags on
+ * @param flags the flags
+ */
+void
+Peers_unset_peer_flag (const struct GNUNET_PeerIdentity *peer, enum Peers_PeerFlags flags)
+{
+ struct PeerContext *peer_ctx;
+
+ peer_ctx = get_peer_ctx (peer);
+ unset_peer_flag (peer_ctx, flags);
+}
+
+
+/**
+ * @brief Check whether flags on a peer are set.
+ *
+ * @param peer the peer to check the flag of
+ * @param flags the flags to check
+ *
+ * @return #GNUNET_SYSERR if peer is not known
+ * #GNUNET_YES if all given flags are set
+ * #GNUNET_NO otherwise
+ */
+int
+Peers_check_peer_flag (const struct GNUNET_PeerIdentity *peer, enum Peers_PeerFlags flags)
+{
+ struct PeerContext *peer_ctx;
+
+ if (GNUNET_NO == Peers_check_peer_known (peer))
+ {
+ return GNUNET_SYSERR;
+ }
+ peer_ctx = get_peer_ctx (peer);
+ return check_peer_flag_set (peer_ctx, flags);
+}
+
+
+/**
+ * @brief set flags on a given channel.
+ *
+ * @param channel the channel to set flags on
+ * @param flags the flags
+ */
+void
+Peers_set_channel_flag (uint32_t *channel_flags, enum Peers_ChannelFlags flags)
+{
+ set_channel_flag (channel_flags, flags);
+}
+
+
+/**
+ * @brief unset flags on a given channel.
+ *
+ * @param channel the channel to unset flags on
+ * @param flags the flags
+ */
+void
+Peers_unset_channel_flag (uint32_t *channel_flags, enum Peers_ChannelFlags flags)
+{
+ unset_channel_flag (channel_flags, flags);
+}
+
+
+/**
+ * @brief Check whether flags on a channel are set.
+ *
+ * @param channel the channel to check the flag of
+ * @param flags the flags to check
+ *
+ * @return #GNUNET_YES if all given flags are set
+ * #GNUNET_NO otherwise
+ */
+int
+Peers_check_channel_flag (uint32_t *channel_flags, enum Peers_ChannelFlags flags)
+{
+ return check_channel_flag_set (channel_flags, flags);
+}
+
+/**
+ * @brief Get the flags for the channel in @a role for @a peer.
+ *
+ * @param peer Peer to get the channel flags for.
+ * @param role Role of channel to get flags for
+ *
+ * @return The flags.
+ */
+uint32_t *
+Peers_get_channel_flag (const struct GNUNET_PeerIdentity *peer,
+ enum Peers_ChannelRole role)
+{
+ const struct PeerContext *peer_ctx;
+
+ peer_ctx = get_peer_ctx (peer);
+ if (Peers_CHANNEL_ROLE_SENDING == role)
+ {
+ return peer_ctx->send_channel_flags;
+ }
+ else if (Peers_CHANNEL_ROLE_RECEIVING == role)
+ {
+ return peer_ctx->recv_channel_flags;
+ }
+ else
+ {
+ GNUNET_assert (0);
+ }
+}
+
+/**
+ * @brief Check whether we have information about the given peer.
+ *
+ * FIXME probably deprecated. Make this the new _online.
+ *
+ * @param peer peer in question
+ *
+ * @return #GNUNET_YES if peer is known
+ * #GNUNET_NO if peer is not knwon
+ */
+int
+Peers_check_peer_known (const struct GNUNET_PeerIdentity *peer)
+{
+ return GNUNET_CONTAINER_multipeermap_contains (peer_map, peer);
+}
+
+
+/**
+ * @brief Check whether @a peer is actually a peer.
+ *
+ * A valid peer is a peer that we know exists eg. we were connected to once.
+ *
+ * @param peer peer in question
+ *
+ * @return #GNUNET_YES if peer is valid
+ * #GNUNET_NO if peer is not valid
+ */
+int
+Peers_check_peer_valid (const struct GNUNET_PeerIdentity *peer)
+{
+ return GNUNET_CONTAINER_multipeermap_contains (valid_peers, peer);
+}
+
+
+/**
+ * @brief Indicate that we want to send to the other peer
+ *
+ * This establishes a sending channel
+ *
+ * @param peer the peer to establish channel to
+ */
+void
+Peers_indicate_sending_intention (const struct GNUNET_PeerIdentity *peer)
+{
+ GNUNET_assert (GNUNET_YES == Peers_check_peer_known (peer));
+ (void) get_channel (peer);
+}
+
+
+/**
+ * @brief Check whether other peer has the intention to send/opened channel
+ * towars us
+ *
+ * @param peer the peer in question
+ *
+ * @return #GNUNET_YES if peer has the intention to send
+ * #GNUNET_NO otherwise
+ */
+int
+Peers_check_peer_send_intention (const struct GNUNET_PeerIdentity *peer)
+{
+ const struct PeerContext *peer_ctx;
+
+ peer_ctx = get_peer_ctx (peer);
+ if (NULL != peer_ctx->recv_channel)
+ {
+ return GNUNET_YES;
+ }
+ return GNUNET_NO;
+}
+
+
+/**
+ * Handle the channel a peer opens to us.
+ *
+ * @param cls The closure
+ * @param channel The channel the peer wants to establish
+ * @param initiator The peer's peer ID
+ *
+ * @return initial channel context for the channel
+ * (can be NULL -- that's not an error)
+ */
+void *
+Peers_handle_inbound_channel (void *cls,
+ struct GNUNET_CADET_Channel *channel,
+ const struct GNUNET_PeerIdentity *initiator)
+{
+ struct PeerContext *peer_ctx;
+
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "New channel was established to us (Peer %s).\n",
+ GNUNET_i2s (initiator));
+ GNUNET_assert (NULL != channel); /* according to cadet API */
+ /* Make sure we 'know' about this peer */
+ peer_ctx = create_or_get_peer_ctx (initiator);
+ set_peer_live (peer_ctx);
+ /* We only accept one incoming channel per peer */
+ if (GNUNET_YES == Peers_check_peer_send_intention (initiator))
+ {
+ set_channel_flag (peer_ctx->recv_channel_flags,
+ Peers_CHANNEL_ESTABLISHED_TWICE);
+ GNUNET_CADET_channel_destroy (channel);
+ /* return the channel context */
+ return &peer_ctx->peer_id;
+ }
+ peer_ctx->recv_channel = channel;
+ return &peer_ctx->peer_id;
+}
+
+
+/**
+ * @brief Check whether a sending channel towards the given peer exists
+ *
+ * @param peer the peer to check for
+ *
+ * @return #GNUNET_YES if a sending channel towards that peer exists
+ * #GNUNET_NO otherwise
+ */
+int
+Peers_check_sending_channel_exists (const struct GNUNET_PeerIdentity *peer)
+{
+ struct PeerContext *peer_ctx;
+
+ if (GNUNET_NO == Peers_check_peer_known (peer))
+ { /* If no such peer exists, there is no channel */
+ return GNUNET_NO;
+ }
+ peer_ctx = get_peer_ctx (peer);
+ if (NULL == peer_ctx->send_channel)
+ {
+ return GNUNET_NO;
+ }
+ return GNUNET_YES;
+}
+
+
+/**
+ * @brief check whether the given channel is the sending channel of the given
+ * peer
+ *
+ * @param peer the peer in question
+ * @param channel the channel to check for
+ * @param role either #Peers_CHANNEL_ROLE_SENDING, or
+ * #Peers_CHANNEL_ROLE_RECEIVING
+ *
+ * @return #GNUNET_YES if the given chennel is the sending channel of the peer
+ * #GNUNET_NO otherwise
+ */
+int
+Peers_check_channel_role (const struct GNUNET_PeerIdentity *peer,
+ const struct GNUNET_CADET_Channel *channel,
+ enum Peers_ChannelRole role)
+{
+ const struct PeerContext *peer_ctx;
+
+ if (GNUNET_NO == Peers_check_peer_known (peer))
+ {
+ return GNUNET_NO;
+ }
+ peer_ctx = get_peer_ctx (peer);
+ if ( (Peers_CHANNEL_ROLE_SENDING == role) &&
+ (channel == peer_ctx->send_channel) )
+ {
+ return GNUNET_YES;
+ }
+ if ( (Peers_CHANNEL_ROLE_RECEIVING == role) &&
+ (channel == peer_ctx->recv_channel) )
+ {
+ return GNUNET_YES;
+ }
+ return GNUNET_NO;
+}
+
+
+/**
+ * @brief Destroy the send channel of a peer e.g. stop indicating a sending
+ * intention to another peer
+ *
+ * If there is also no channel to receive messages from that peer, remove it
+ * from the peermap.
+ * TODO really?
+ *
+ * @peer the peer identity of the peer whose sending channel to destroy
+ * @return #GNUNET_YES if channel was destroyed
+ * #GNUNET_NO otherwise
+ */
+int
+Peers_destroy_sending_channel (const struct GNUNET_PeerIdentity *peer)
+{
+ struct PeerContext *peer_ctx;
+
+ if (GNUNET_NO == Peers_check_peer_known (peer))
+ {
+ return GNUNET_NO;
+ }
+ peer_ctx = get_peer_ctx (peer);
+ if (NULL != peer_ctx->send_channel)
+ {
+ set_channel_flag (peer_ctx->send_channel_flags, Peers_CHANNEL_CLEAN);
+ GNUNET_CADET_channel_destroy (peer_ctx->send_channel);
+ peer_ctx->send_channel = NULL;
+ (void) Peers_check_connected (peer);
+ return GNUNET_YES;
+ }
+ return GNUNET_NO;
+}
+
+/**
+ * This is called when a channel is destroyed.
+ *
+ * @param cls The closure
+ * @param channel The channel being closed
+ * @param channel_ctx The context associated with this channel
+ */
+void
+Peers_cleanup_destroyed_channel (void *cls,
+ const struct GNUNET_CADET_Channel *channel)
+{
+ struct GNUNET_PeerIdentity *peer = cls;
+ struct PeerContext *peer_ctx;
+
+ if (GNUNET_NO == Peers_check_peer_known (peer))
+ {/* We don't want to implicitly create a context that we're about to kill */
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "channel (%s) without associated context was destroyed\n",
+ GNUNET_i2s (peer));
+ return;
+ }
+ peer_ctx = get_peer_ctx (peer);
+
+ /* If our peer issued the destruction of the channel, the #Peers_TO_DESTROY
+ * flag will be set. In this case simply make sure that the channels are
+ * cleaned. */
+ /* FIXME This distinction seems to be redundant */
+ if (Peers_check_peer_flag (peer, Peers_TO_DESTROY))
+ {/* We initiatad the destruction of this particular peer */
+ if (channel == peer_ctx->send_channel)
+ peer_ctx->send_channel = NULL;
+ else if (channel == peer_ctx->recv_channel)
+ peer_ctx->recv_channel = NULL;
+
+ if (NULL != peer_ctx->send_channel)
+ {
+ GNUNET_CADET_channel_destroy (peer_ctx->send_channel);
+ peer_ctx->send_channel = NULL;
+ }
+ if (NULL != peer_ctx->recv_channel)
+ {
+ GNUNET_CADET_channel_destroy (peer_ctx->recv_channel);
+ peer_ctx->recv_channel = NULL;
+ }
+ /* Set the #Peers_ONLINE flag accordingly */
+ (void) Peers_check_connected (peer);
+ return;
+ }
+
+ else
+ { /* We did not initiate the destruction of this peer */
+ if (channel == peer_ctx->send_channel)
+ { /* Something (but us) killd the channel - clean up peer */
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "send channel (%s) was destroyed - cleaning up\n",
+ GNUNET_i2s (peer));
+ peer_ctx->send_channel = NULL;
+ }
+ else if (channel == peer_ctx->recv_channel)
+ { /* Other peer doesn't want to send us messages anymore */
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Peer %s destroyed recv channel - cleaning up channel\n",
+ GNUNET_i2s (peer));
+ peer_ctx->recv_channel = NULL;
+ }
+ else
+ {
+ LOG (GNUNET_ERROR_TYPE_WARNING,
+ "unknown channel (%s) was destroyed\n",
+ GNUNET_i2s (peer));
+ }
+ }
+ (void) Peers_check_connected (peer);
+}
+
+/**
+ * @brief Send a message to another peer.
+ *
+ * Keeps track about pending messages so they can be properly removed when the
+ * peer is destroyed.
+ *
+ * @param peer receeiver of the message
+ * @param ev envelope of the message
+ * @param type type of the message
+ */
+void
+Peers_send_message (const struct GNUNET_PeerIdentity *peer,
+ struct GNUNET_MQ_Envelope *ev,
+ const char *type)
+{
+ struct PendingMessage *pending_msg;
+ struct GNUNET_MQ_Handle *mq;
+
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Sending message to %s of type %s\n",
+ GNUNET_i2s (peer),
+ type);
+ pending_msg = insert_pending_message (peer, ev, type);
+ mq = get_mq (peer);
+ GNUNET_MQ_notify_sent (ev,
+ mq_notify_sent_cb,
+ pending_msg);
+ GNUNET_MQ_send (mq, ev);
+}
+
+/**
+ * @brief Schedule a operation on given peer
+ *
+ * Avoids scheduling an operation twice.
+ *
+ * @param peer the peer we want to schedule the operation for once it gets live
+ *
+ * @return #GNUNET_YES if the operation was scheduled
+ * #GNUNET_NO otherwise
+ */
+int
+Peers_schedule_operation (const struct GNUNET_PeerIdentity *peer,
+ const PeerOp peer_op)
+{
+ struct PeerPendingOp pending_op;
+ struct PeerContext *peer_ctx;
+
+ if (0 == GNUNET_CRYPTO_cmp_peer_identity (peer, &own_identity))
+ {
+ return GNUNET_NO;
+ }
+ GNUNET_assert (GNUNET_YES == Peers_check_peer_known (peer));
+
+ //TODO if LIVE/ONLINE execute immediately
+
+ if (GNUNET_NO == check_operation_scheduled (peer, peer_op))
+ {
+ peer_ctx = get_peer_ctx (peer);
+ pending_op.op = peer_op;
+ pending_op.op_cls = NULL;
+ GNUNET_array_append (peer_ctx->pending_ops,
+ peer_ctx->num_pending_ops,
+ pending_op);
+ return GNUNET_YES;
+ }
+ return GNUNET_NO;
+}
+
+/**
+ * @brief Get the recv_channel of @a peer.
+ * Needed to correctly handle (call #GNUNET_CADET_receive_done()) incoming
+ * messages.
+ *
+ * @param peer The peer to get the recv_channel from.
+ *
+ * @return The recv_channel.
+ */
+struct GNUNET_CADET_Channel *
+Peers_get_recv_channel (const struct GNUNET_PeerIdentity *peer)
+{
+ struct PeerContext *peer_ctx;
+
+ GNUNET_assert (GNUNET_YES == Peers_check_peer_known (peer));
+ peer_ctx = get_peer_ctx (peer);
+ return peer_ctx->recv_channel;
+}
+/***********************************************************************
+ * /Old gnunet-service-rps_peers.c
+***********************************************************************/
+
+
/***********************************************************************
* Housekeeping with clients
***********************************************************************/
{
struct GNUNET_PeerIdentity *peer = cls;
uint32_t *channel_flag;
+ struct PeerContext *peer_ctx;
if (GNUNET_NO == Peers_check_peer_known (peer))
{ /* We don't know a context to that peer */
return;
}
+ peer_ctx = get_peer_ctx (peer);
+ if (GNUNET_YES == Peers_check_channel_role (peer, channel, Peers_CHANNEL_ROLE_RECEIVING))
+ {
+ set_channel_flag (peer_ctx->recv_channel_flags, Peers_CHANNEL_DESTROING);
+ } else if (GNUNET_YES == Peers_check_channel_role (peer, channel, Peers_CHANNEL_ROLE_SENDING))
+ {
+ set_channel_flag (peer_ctx->send_channel_flags, Peers_CHANNEL_DESTROING);
+ }
+
if (GNUNET_YES == Peers_check_peer_flag (peer, Peers_TO_DESTROY))
{ /* We are in the middle of removing that peer from our knowledge. In this
case simply make sure that the channels are cleaned. */
(rep_cls->id != ntohl (msg->id)) )
rep_cls = rep_cls->next;
GNUNET_assert (rep_cls->id == ntohl (msg->id));
- RPS_sampler_request_cancel (rep_cls->req_handle);
destroy_reply_cls (rep_cls);
GNUNET_SERVICE_client_continue (cli_ctx->client);
}
(3 == mal_type) )
{ /* Try to maximise representation */
tmp_att_peer = GNUNET_new (struct AttackedPeer);
- GNUNET_memcpy (&tmp_att_peer->peer_id, peer, sizeof (struct GNUNET_PeerIdentity));
+ tmp_att_peer->peer_id = *peer;
if (NULL == att_peer_set)
att_peer_set = GNUNET_CONTAINER_multipeermap_create (1, GNUNET_NO);
- if (GNUNET_NO == GNUNET_CONTAINER_multipeermap_contains (att_peer_set,
- peer))
+ if (GNUNET_NO ==
+ GNUNET_CONTAINER_multipeermap_contains (att_peer_set,
+ peer))
{
GNUNET_CONTAINER_DLL_insert (att_peers_head,
att_peers_tail,
tmp_att_peer);
add_peer_array_to_set (peer, 1, att_peer_set);
}
- GNUNET_CADET_receive_done (Peers_get_recv_channel (peer));
}
else if (2 == mal_type)
- { /* We attack one single well-known peer - simply ignore */
- GNUNET_CADET_receive_done (Peers_get_recv_channel (peer));
+ {
+ /* We attack one single well-known peer - simply ignore */
}
#endif /* ENABLE_MALICIOUS */
|| 3 == mal_type)
{ /* Try to maximise representation */
send_pull_reply (peer, mal_peers, num_mal_peers);
- GNUNET_CADET_receive_done (Peers_get_recv_channel (peer));
}
else if (2 == mal_type)
{
send_pull_reply (peer, mal_peers, num_mal_peers);
}
- GNUNET_CADET_receive_done (Peers_get_recv_channel (peer));
}
#endif /* ENABLE_MALICIOUS */
handle_peer_pull_reply (void *cls,
const struct GNUNET_RPS_P2P_PullReplyMessage *msg)
{
- struct GNUNET_PeerIdentity *peers;
+ const struct GNUNET_PeerIdentity *peers;
struct GNUNET_PeerIdentity *sender = cls;
uint32_t i;
#ifdef ENABLE_MALICIOUS
// We shouldn't even receive pull replies as we're not sending
if (2 == mal_type)
{
- GNUNET_CADET_receive_done (Peers_get_recv_channel (sender));
}
#endif /* ENABLE_MALICIOUS */
/* Do actual logic */
- peers = (struct GNUNET_PeerIdentity *) &msg[1];
+ peers = (const struct GNUNET_PeerIdentity *) &msg[1];
LOG (GNUNET_ERROR_TYPE_DEBUG,
"PULL REPLY received, got following %u peers:\n",
reply_cls);
GNUNET_free (reply_cls);
}
- GNUNET_MQ_destroy (client_ctx->mq);
GNUNET_CONTAINER_DLL_remove (cli_ctx_head, cli_ctx_tail, client_ctx);
GNUNET_free (client_ctx);
}
GNUNET_NSE_disconnect (nse);
RPS_sampler_destroy (prot_sampler);
RPS_sampler_destroy (client_sampler);
+ GNUNET_CADET_close_port (cadet_port);
GNUNET_CADET_disconnect (cadet_handle);
View_destroy ();
CustomPeerMap_destroy (push_map);
projects / oweals / gnunet.git / blobdiff