test_rps_seed_request
test_rps_single_req
test_service_rps_custommap
-test_service_rps_peers
test_service_rps_sampler_elem
test_service_rps_view
test_rps_churn
gnunet_service_rps_SOURCES = \
gnunet-service-rps_sampler_elem.h gnunet-service-rps_sampler_elem.c \
gnunet-service-rps_sampler.h gnunet-service-rps_sampler.c \
- gnunet-service-rps_peers.h gnunet-service-rps_peers.c \
gnunet-service-rps_custommap.h gnunet-service-rps_custommap.c \
gnunet-service-rps_view.h gnunet-service-rps_view.c \
rps-test_util.h rps-test_util.c \
check_PROGRAMS = \
test_service_rps_view \
test_service_rps_custommap \
- test_service_rps_peers \
test_service_rps_sampler_elem \
test_rps_malicious_1 \
test_rps_malicious_2 \
test_service_rps_view.c
test_service_rps_view_LDADD = $(top_builddir)/src/util/libgnunetutil.la
-test_service_rps_peers_SOURCES = \
- gnunet-service-rps_peers.h gnunet-service-rps_peers.c \
- test_service_rps_peers.c
-test_service_rps_peers_LDADD = \
- $(top_builddir)/src/util/libgnunetutil.la \
- $(top_builddir)/src/cadet/libgnunetcadet.la
-
test_service_rps_custommap_SOURCES = \
gnunet-service-rps_custommap.h gnunet-service-rps_custommap.c \
test_service_rps_custommap.c
#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
***********************************************************************/
+++ /dev/null
-/*
- This file is part of GNUnet.
- Copyright (C)
-
- 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., 51 Franklin Street, Fifth Floor,
- Boston, MA 02110-1301, USA.
-*/
-
-/**
- * @file rps/gnunet-service-rps_peers.c
- * @brief utilities for managing (information about) peers
- * @author Julius Bünger
- */
-#include "platform.h"
-#include "gnunet_applications.h"
-#include "gnunet_util_lib.h"
-#include "gnunet_cadet_service.h"
-#include <inttypes.h>
-#include "rps.h"
-#include "gnunet-service-rps_peers.h"
-
-
-
-#define LOG(kind, ...) GNUNET_log_from(kind,"rps-peers",__VA_ARGS__)
-
-
-/**
- * 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;
-
-/**
- * Own #GNUNET_PeerIdentity.
- */
-static const struct GNUNET_PeerIdentity *own_identity;
-
-/**
- * Cadet handle.
- */
-static struct GNUNET_CADET_Handle *cadet_handle;
-
-/**
- * @brief Disconnect handler
- */
-static GNUNET_CADET_DisconnectEventHandler cleanup_destroyed_channel;
-
-/**
- * @brief cadet handlers
- */
-static const struct GNUNET_MQ_MessageHandler *cadet_handlers;
-
-
-
-/**
- * @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;
-}
-
-
-/**
- * @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);
-}
-
-
-/**
- * @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);
-}
-
-
-/**
- * @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;
-
- 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;
-}
-
-
-/**
- * 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 %u) - 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 c_handlers cadet handlers
- * @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_MQ_MessageHandler *c_handlers,
- const struct GNUNET_PeerIdentity *own_id)
-{
- filename_valid_peers = GNUNET_strdup (fn_valid_peers);
- cadet_handle = cadet_h;
- cleanup_destroyed_channel = disconnect_handler;
- cadet_handlers = c_handlers;
- 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;
-}
-
-
-/**
- * @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;
-}
-
-
-/**
- * @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;
-
- 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;
- }
- if (NULL != peer_ctx->send_channel)
- {
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "Destroying send channel\n");
- GNUNET_CADET_channel_destroy (peer_ctx->send_channel);
- peer_ctx->send_channel = NULL;
- }
- if (NULL != peer_ctx->recv_channel)
- {
- 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;
-}
-
-/* end of gnunet-service-rps_peers.c */
+++ /dev/null
-/*
- This file is part of GNUnet.
- Copyright (C)
-
- 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., 51 Franklin Street, Fifth Floor,
- Boston, MA 02110-1301, USA.
-*/
-
-/**
- * @file rps/gnunet-service-rps_peers.h
- * @brief utilities for managing (information about) peers
- * @author Julius Bünger
- */
-#include "gnunet_util_lib.h"
-#include <inttypes.h>
-#include "gnunet_cadet_service.h"
-
-
-/**
- * Different flags indicating the status of another peer.
- */
-enum Peers_PeerFlags
-{
- /**
- * If we are waiting for a reply from that peer (sent a pull request).
- */
- Peers_PULL_REPLY_PENDING = 0x01,
-
- /* IN_OTHER_GOSSIP_LIST = 0x02, unneeded? */
- /* IN_OWN_SAMPLER_LIST = 0x04, unneeded? */
- /* IN_OWN_GOSSIP_LIST = 0x08, unneeded? */
-
- /**
- * We set this bit when we know the peer is online.
- */
- Peers_ONLINE = 0x20,
-
- /**
- * We set this bit when we are going to destroy the channel to this peer.
- * When cleanup_channel is called, we know that we wanted to destroy it.
- * Otherwise the channel to the other peer was destroyed.
- */
- Peers_TO_DESTROY = 0x40,
-};
-
-/**
- * Keep track of the status of a channel.
- *
- * This is needed in order to know what to do with a channel when it's
- * destroyed.
- */
-enum Peers_ChannelFlags
-{
- /**
- * We destroyed the channel because the other peer established a second one.
- */
- Peers_CHANNEL_ESTABLISHED_TWICE = 0x1,
-
- /**
- * The channel was removed because it was not needed any more. This should be
- * the sending channel.
- */
- Peers_CHANNEL_CLEAN = 0x2,
-};
-
-/**
- * @brief The role of a channel. Sending or receiving.
- */
-enum Peers_ChannelRole
-{
- /**
- * Channel is used for sending
- */
- Peers_CHANNEL_ROLE_SENDING = 0x01,
-
- /**
- * Channel is used for receiving
- */
- Peers_CHANNEL_ROLE_RECEIVING = 0x02,
-};
-
-/**
- * @brief Functions of this type can be used to be stored at a peer for later execution.
- *
- * @param cls closure
- * @param peer peer to execute function on
- */
-typedef void (* PeerOp) (void *cls, const struct GNUNET_PeerIdentity *peer);
-
-/**
- * @brief Iterator over valid peers.
- *
- * @param cls closure
- * @param peer current public peer id
- * @return #GNUNET_YES if we should continue to
- * iterate,
- * #GNUNET_NO if not.
- */
-typedef int
-(*PeersIterator) (void *cls,
- const struct GNUNET_PeerIdentity *peer);
-
-/**
- * @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 c_handlers cadet handlers
- * @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_MQ_MessageHandler *c_handlers,
- const struct GNUNET_PeerIdentity *own_id);
-
-/**
- * @brief Delete storage of peers that was created with #Peers_initialise ()
- */
-void
-Peers_terminate ();
-
-
-/**
- * @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);
-
-/**
- * @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);
-
-/**
- * @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);
-
-/**
- * @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);
-
-/**
- * @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);
-
-/**
- * @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);
-
-/**
- * @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);
-
-/**
- * @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_YES if all given flags are set
- * ##GNUNET_NO otherwise
- */
-int
-Peers_check_peer_flag (const struct GNUNET_PeerIdentity *peer, enum Peers_PeerFlags 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);
-
-/**
- * @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);
-
-/**
- * @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);
-
-/**
- * @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);
-
-/**
- * @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);
-
-/**
- * @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);
-
-/**
- * @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);
-
-/**
- * @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);
-
-/**
- * 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);
-
-/**
- * @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);
-
-/**
- * @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);
-
-/**
- * @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.
- *
- * @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);
-
-/**
- * This is called when a channel is destroyed.
- *
- * Removes peer completely from our knowledge if the send_channel was destroyed
- * Otherwise simply delete the recv_channel
- *
- * @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);
-
-/**
- * @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);
-
-/**
- * @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);
-
-/**
- * @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);
-
-/* end of gnunet-service-rps_peers.h */
};
#endif /* ENABLE_MALICIOUS */
+
+/***********************************************************************
+ * Defines from old gnunet-service-rps_peers.h
+***********************************************************************/
+
+/**
+ * Different flags indicating the status of another peer.
+ */
+enum Peers_PeerFlags
+{
+ /**
+ * If we are waiting for a reply from that peer (sent a pull request).
+ */
+ Peers_PULL_REPLY_PENDING = 0x01,
+
+ /* IN_OTHER_GOSSIP_LIST = 0x02, unneeded? */
+ /* IN_OWN_SAMPLER_LIST = 0x04, unneeded? */
+ /* IN_OWN_GOSSIP_LIST = 0x08, unneeded? */
+
+ /**
+ * We set this bit when we know the peer is online.
+ */
+ Peers_ONLINE = 0x20,
+
+ /**
+ * We set this bit when we are going to destroy the channel to this peer.
+ * When cleanup_channel is called, we know that we wanted to destroy it.
+ * Otherwise the channel to the other peer was destroyed.
+ */
+ Peers_TO_DESTROY = 0x40,
+};
+
+/**
+ * Keep track of the status of a channel.
+ *
+ * This is needed in order to know what to do with a channel when it's
+ * destroyed.
+ */
+enum Peers_ChannelFlags
+{
+ /**
+ * We destroyed the channel because the other peer established a second one.
+ */
+ Peers_CHANNEL_ESTABLISHED_TWICE = 0x1,
+
+ /**
+ * The channel was removed because it was not needed any more. This should be
+ * the sending channel.
+ */
+ Peers_CHANNEL_CLEAN = 0x2,
+
+ /**
+ * We destroyed the channel because the other peer established a second one.
+ */
+ Peers_CHANNEL_DESTROING = 0x4,
+};
+
+
+/**
+ * @brief The role of a channel. Sending or receiving.
+ */
+enum Peers_ChannelRole
+{
+ /**
+ * Channel is used for sending
+ */
+ Peers_CHANNEL_ROLE_SENDING = 0x01,
+
+ /**
+ * Channel is used for receiving
+ */
+ Peers_CHANNEL_ROLE_RECEIVING = 0x02,
+};
+
+/**
+ * @brief Functions of this type can be used to be stored at a peer for later execution.
+ *
+ * @param cls closure
+ * @param peer peer to execute function on
+ */
+typedef void (* PeerOp) (void *cls, const struct GNUNET_PeerIdentity *peer);
+
+/**
+ * @brief Iterator over valid peers.
+ *
+ * @param cls closure
+ * @param peer current public peer id
+ * @return #GNUNET_YES if we should continue to
+ * iterate,
+ * #GNUNET_NO if not.
+ */
+typedef int
+(*PeersIterator) (void *cls,
+ const struct GNUNET_PeerIdentity *peer);
+
+
GNUNET_NETWORK_STRUCT_END
+++ /dev/null
-/*
- This file is part of GNUnet.
- Copyright (C)
-
- 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., 51 Franklin Street, Fifth Floor,
- Boston, MA 02110-1301, USA.
-*/
-/**
- * @file rps/test_service_rps_peers.c
- * @brief testcase for gnunet-service-rps_peers.c
- */
-#include <platform.h>
-#include "gnunet-service-rps_peers.h"
-
-#define ABORT() { fprintf(stderr, "Error at %s:%d\n", __FILE__, __LINE__); Peers_terminate (); return 1; }
-#define CHECK(c) { if (! (c)) ABORT(); }
-
-#define FN_VALID_PEERS "DISABLE"
-
-/**
- * @brief Dummy implementation of #PeerOp (Operation on peer)
- *
- * @param cls closure
- * @param peer peer
- */
-void peer_op (void *cls, const struct GNUNET_PeerIdentity *peer)
-{
- GNUNET_assert (NULL != peer);
-}
-
-/**
- * @brief Function that is called on a peer for later execution
- *
- * @param cls closure
- * @param peer peer to execute function upon
- */
-void
-peer_op (void *cls, const struct GNUNET_PeerIdentity *peer);
-
-static int
-check ()
-{
- struct GNUNET_PeerIdentity k1;
- struct GNUNET_PeerIdentity own_id;
-
- memset (&k1, 0, sizeof (k1));
- memset (&own_id, 1, sizeof (own_id));
-
- /* Do nothing */
- Peers_initialise (FN_VALID_PEERS, NULL, NULL, NULL, &own_id);
- Peers_terminate ();
-
-
- /* Create peer */
- Peers_initialise (FN_VALID_PEERS, NULL, NULL, NULL, &own_id);
- CHECK (GNUNET_YES == Peers_insert_peer (&k1));
- Peers_terminate ();
-
-
- /* Create peer */
- Peers_initialise (FN_VALID_PEERS, NULL, NULL, NULL, &own_id);
- CHECK (GNUNET_YES == Peers_insert_peer (&k1));
- CHECK (GNUNET_YES == Peers_remove_peer (&k1));
- Peers_terminate ();
-
-
- /* Insertion and Removal */
- Peers_initialise (FN_VALID_PEERS, NULL, NULL, NULL, &own_id);
- CHECK (GNUNET_NO == Peers_check_peer_known (&k1));
-
- CHECK (GNUNET_YES == Peers_insert_peer (&k1));
- CHECK (GNUNET_NO == Peers_insert_peer (&k1));
- CHECK (GNUNET_YES == Peers_check_peer_known (&k1));
-
- CHECK (GNUNET_YES == Peers_remove_peer (&k1));
- CHECK (GNUNET_NO == Peers_remove_peer (&k1));
- CHECK (GNUNET_NO == Peers_check_peer_known (&k1));
-
-
- /* Flags */
- Peers_insert_peer (&k1);
-
- CHECK (GNUNET_NO == Peers_check_peer_flag (&k1, Peers_PULL_REPLY_PENDING));
- CHECK (GNUNET_NO == Peers_check_peer_flag (&k1, Peers_ONLINE));
- CHECK (GNUNET_NO == Peers_check_peer_flag (&k1, Peers_TO_DESTROY));
-
- CHECK (GNUNET_NO == Peers_check_peer_flag (&k1, Peers_ONLINE));
-
- Peers_set_peer_flag (&k1, Peers_ONLINE);
- CHECK (GNUNET_YES == Peers_check_peer_flag (&k1, Peers_ONLINE));
- CHECK (GNUNET_NO == Peers_check_peer_flag (&k1, Peers_TO_DESTROY));
- CHECK (GNUNET_YES == Peers_check_peer_flag (&k1, Peers_ONLINE));
- CHECK (GNUNET_NO == Peers_check_peer_flag (&k1, Peers_TO_DESTROY));
-
- /* Check send intention */
- CHECK (GNUNET_NO == Peers_check_peer_send_intention (&k1));
-
- /* Check existence of sending channel */
- CHECK (GNUNET_NO == Peers_check_sending_channel_exists (&k1));
-
- /* Check role of channels */
- CHECK (GNUNET_YES == Peers_check_channel_role (&k1,
- NULL,
- Peers_CHANNEL_ROLE_SENDING));
- CHECK (GNUNET_YES == Peers_check_channel_role (&k1,
- NULL,
- Peers_CHANNEL_ROLE_RECEIVING));
-
- CHECK (GNUNET_YES == Peers_schedule_operation (&k1, peer_op));
-
- Peers_terminate ();
- return 0;
-}
-
-
-int
-main (int argc, char *argv[])
-{
- GNUNET_log_setup ("test_service_rps_peers",
- "WARNING",
- NULL);
- return check ();
-}
-
-/* end of test_service_rps_peers.c */
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