/*
This file is part of GNUnet.
- (C) 2009, 2010, 2011 Christian Grothoff (and other contributing authors)
+ Copyright (C) 2009, 2010, 2011, 2016 GNUnet e.V.
- 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 free software: you can redistribute it and/or modify it
+ under the terms of the GNU Affero General Public License as published
+ by the Free Software Foundation, either version 3 of the License,
+ or (at your option) any later version.
GNUnet is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with GNUnet; see the file COPYING. If not, write to the
- Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA.
+ Affero General Public License for more details.
*/
/**
#include <gcrypt.h>
#include "gnunet_util_lib.h"
#include "gnunet-service-core.h"
-#include "gnunet-service-core_clients.h"
#include "gnunet-service-core_kx.h"
-#include "gnunet-service-core_neighbours.h"
#include "gnunet-service-core_sessions.h"
#include "gnunet-service-core_typemap.h"
+/**
+ * How many messages do we queue up at most for any client? This can
+ * cause messages to be dropped if clients do not process them fast
+ * enough! Note that this is a soft limit; we try
+ * to keep a few larger messages above the limit.
+ */
+#define SOFT_MAX_QUEUE 128
+
+/**
+ * How many messages do we queue up at most for any client? This can
+ * cause messages to be dropped if clients do not process them fast
+ * enough! Note that this is the hard limit.
+ */
+#define HARD_MAX_QUEUE 256
+
+
+/**
+ * Data structure for each client connected to the CORE service.
+ */
+struct GSC_Client
+{
+ /**
+ * Clients are kept in a linked list.
+ */
+ struct GSC_Client *next;
+
+ /**
+ * Clients are kept in a linked list.
+ */
+ struct GSC_Client *prev;
+
+ /**
+ * Handle for the client with the server API.
+ */
+ struct GNUNET_SERVICE_Client *client;
+
+ /**
+ * Message queue to talk to @e client.
+ */
+ struct GNUNET_MQ_Handle *mq;
+
+ /**
+ * Array of the types of messages this peer cares
+ * about (with @e tcnt entries). Allocated as part
+ * of this client struct, do not free!
+ */
+ uint16_t *types;
+
+ /**
+ * Map of peer identities to active transmission requests of this
+ * client to the peer (of type `struct GSC_ClientActiveRequest`).
+ */
+ struct GNUNET_CONTAINER_MultiPeerMap *requests;
+
+ /**
+ * Map containing all peers that this client knows we're connected to.
+ */
+ struct GNUNET_CONTAINER_MultiPeerMap *connectmap;
+
+ /**
+ * Options for messages this client cares about,
+ * see GNUNET_CORE_OPTION_ values.
+ */
+ uint32_t options;
+
+ /**
+ * Have we gotten the #GNUNET_MESSAGE_TYPE_CORE_INIT message
+ * from this client already?
+ */
+ int got_init;
+
+ /**
+ * Number of types of incoming messages this client
+ * specifically cares about. Size of the @e types array.
+ */
+ unsigned int tcnt;
+
+};
+
/**
* Our identity.
struct GNUNET_STATISTICS_Handle *GSC_stats;
/**
- * Handle to the server of the core service.
+ * Big "or" of all client options.
*/
-static struct GNUNET_SERVER_Handle *GSC_server;
+static uint32_t all_client_options;
/**
- * Hostkey generation context
+ * Head of linked list of our clients.
*/
-static struct GNUNET_CRYPTO_EccKeyGenerationContext *keygen;
+static struct GSC_Client *client_head;
+
+/**
+ * Tail of linked list of our clients.
+ */
+static struct GSC_Client *client_tail;
/**
- * Last task run during shutdown. Disconnects us from
- * the transport.
- *
- * @param cls NULL, unused
- * @param tc scheduler context, unused
+ * Test if the client is interested in messages of the given type.
+ *
+ * @param type message type
+ * @param c client to test
+ * @return #GNUNET_YES if @a c is interested, #GNUNET_NO if not.
+ */
+static int
+type_match (uint16_t type,
+ struct GSC_Client *c)
+{
+ if ( (0 == c->tcnt) &&
+ (0 != c->options) )
+ return GNUNET_YES; /* peer without handlers and inbound/outbond
+ callbacks matches ALL */
+ if (NULL == c->types)
+ return GNUNET_NO;
+ for (unsigned int i = 0; i < c->tcnt; i++)
+ if (type == c->types[i])
+ return GNUNET_YES;
+ return GNUNET_NO;
+}
+
+
+/**
+ * Check #GNUNET_MESSAGE_TYPE_CORE_INIT request.
+ *
+ * @param cls client that sent #GNUNET_MESSAGE_TYPE_CORE_INIT
+ * @param im the `struct InitMessage`
+ * @return #GNUNET_OK if @a im is well-formed
+ */
+static int
+check_client_init (void *cls,
+ const struct InitMessage *im)
+{
+ return GNUNET_OK;
+}
+
+
+/**
+ * Handle #GNUNET_MESSAGE_TYPE_CORE_INIT request.
+ *
+ * @param cls client that sent #GNUNET_MESSAGE_TYPE_CORE_INIT
+ * @param im the `struct InitMessage`
*/
static void
-shutdown_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
+handle_client_init (void *cls,
+ const struct InitMessage *im)
+{
+ struct GSC_Client *c = cls;
+ struct GNUNET_MQ_Envelope *env;
+ struct InitReplyMessage *irm;
+ uint16_t msize;
+ const uint16_t *types;
+
+ /* check that we don't have an entry already */
+ msize = ntohs (im->header.size) - sizeof (struct InitMessage);
+ types = (const uint16_t *) &im[1];
+ c->tcnt = msize / sizeof (uint16_t);
+ c->options = ntohl (im->options);
+ c->got_init = GNUNET_YES;
+ all_client_options |= c->options;
+ c->types = GNUNET_malloc (msize);
+ GNUNET_assert (GNUNET_YES ==
+ GNUNET_CONTAINER_multipeermap_put (c->connectmap,
+ &GSC_my_identity,
+ NULL,
+ GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY));
+ for (unsigned int i = 0; i < c->tcnt; i++)
+ c->types[i] = ntohs (types[i]);
+ GSC_TYPEMAP_add (c->types,
+ c->tcnt);
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Client connecting to core service is interested in %u message types\n",
+ (unsigned int) c->tcnt);
+ /* send init reply message */
+ env = GNUNET_MQ_msg (irm,
+ GNUNET_MESSAGE_TYPE_CORE_INIT_REPLY);
+ irm->reserved = htonl (0);
+ irm->my_identity = GSC_my_identity;
+ GNUNET_MQ_send (c->mq,
+ env);
+ GSC_SESSIONS_notify_client_about_sessions (c);
+ GNUNET_SERVICE_client_continue (c->client);
+}
+
+
+/**
+ * We will never be ready to transmit the given message in (disconnect
+ * or invalid request). Frees resources associated with @a car. We
+ * don't explicitly tell the client, he'll learn with the disconnect
+ * (or violated the protocol).
+ *
+ * @param car request that now permanently failed; the
+ * responsibility for the handle is now returned
+ * to CLIENTS (SESSIONS is done with it).
+ * @param drop_client #GNUNET_YES if the client violated the protocol
+ * and we should thus drop the connection
+ */
+void
+GSC_CLIENTS_reject_request (struct GSC_ClientActiveRequest *car,
+ int drop_client)
+{
+ GNUNET_assert (GNUNET_YES ==
+ GNUNET_CONTAINER_multipeermap_remove (car->
+ client_handle->requests,
+ &car->target,
+ car));
+ if (GNUNET_YES == drop_client)
+ GNUNET_SERVICE_client_drop (car->client_handle->client);
+ GNUNET_free (car);
+}
+
+
+/**
+ * Tell a client that we are ready to receive the message.
+ *
+ * @param car request that is now ready; the responsibility
+ * for the handle remains shared between CLIENTS
+ * and SESSIONS after this call.
+ */
+void
+GSC_CLIENTS_solicit_request (struct GSC_ClientActiveRequest *car)
{
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Core service shutting down.\n");
- if (NULL != keygen)
+ struct GSC_Client *c;
+ struct GNUNET_MQ_Envelope *env;
+ struct SendMessageReady *smr;
+ struct GNUNET_TIME_Relative delay;
+ struct GNUNET_TIME_Relative left;
+
+ c = car->client_handle;
+ if (GNUNET_YES !=
+ GNUNET_CONTAINER_multipeermap_contains (c->connectmap,
+ &car->target))
{
- GNUNET_CRYPTO_ecc_key_create_stop (keygen);
- keygen = NULL;
+ /* connection has gone down since, drop request */
+ GNUNET_assert (0 !=
+ memcmp (&car->target,
+ &GSC_my_identity,
+ sizeof (struct GNUNET_PeerIdentity)));
+ GSC_SESSIONS_dequeue_request (car);
+ GSC_CLIENTS_reject_request (car,
+ GNUNET_NO);
+ return;
}
- GSC_CLIENTS_done ();
- GSC_NEIGHBOURS_done ();
- GSC_SESSIONS_done ();
- GSC_KX_done ();
- GSC_TYPEMAP_done ();
- if (NULL != GSC_stats)
+ delay = GNUNET_TIME_absolute_get_duration (car->received_time);
+ left = GNUNET_TIME_absolute_get_duration (car->deadline);
+ if (delay.rel_value_us > GNUNET_CONSTANTS_LATENCY_WARN.rel_value_us)
+ GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
+ "Client waited %s for permission to transmit to `%s'%s (priority %u)\n",
+ GNUNET_STRINGS_relative_time_to_string (delay,
+ GNUNET_YES),
+ GNUNET_i2s (&car->target),
+ (0 == left.rel_value_us)
+ ? " (past deadline)"
+ : "",
+ car->priority);
+ env = GNUNET_MQ_msg (smr,
+ GNUNET_MESSAGE_TYPE_CORE_SEND_READY);
+ smr->size = htons (car->msize);
+ smr->smr_id = car->smr_id;
+ smr->peer = car->target;
+ GNUNET_MQ_send (c->mq,
+ env);
+}
+
+
+/**
+ * Handle #GNUNET_MESSAGE_TYPE_CORE_SEND_REQUEST message.
+ *
+ * @param cls client that sent a #GNUNET_MESSAGE_TYPE_CORE_SEND_REQUEST
+ * @param req the `struct SendMessageRequest`
+ */
+static void
+handle_client_send_request (void *cls,
+ const struct SendMessageRequest *req)
+{
+ struct GSC_Client *c = cls;
+ struct GSC_ClientActiveRequest *car;
+ int is_loopback;
+
+ if (NULL == c->requests)
+ c->requests = GNUNET_CONTAINER_multipeermap_create (16,
+ GNUNET_NO);
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Client asked for transmission to `%s'\n",
+ GNUNET_i2s (&req->peer));
+ is_loopback =
+ (0 ==
+ memcmp (&req->peer,
+ &GSC_my_identity,
+ sizeof (struct GNUNET_PeerIdentity)));
+ if ((! is_loopback) &&
+ (GNUNET_YES !=
+ GNUNET_CONTAINER_multipeermap_contains (c->connectmap,
+ &req->peer)))
{
- GNUNET_STATISTICS_destroy (GSC_stats, GNUNET_NO);
- GSC_stats = NULL;
+ /* neighbour must have disconnected since request was issued,
+ * ignore (client will realize it once it processes the
+ * disconnect notification) */
+ GNUNET_STATISTICS_update (GSC_stats,
+ gettext_noop
+ ("# send requests dropped (disconnected)"), 1,
+ GNUNET_NO);
+ GNUNET_SERVICE_client_continue (c->client);
+ return;
}
- GSC_cfg = NULL;
+
+ car = GNUNET_CONTAINER_multipeermap_get (c->requests,
+ &req->peer);
+ if (NULL == car)
+ {
+ /* create new entry */
+ car = GNUNET_new (struct GSC_ClientActiveRequest);
+ GNUNET_assert (GNUNET_OK ==
+ GNUNET_CONTAINER_multipeermap_put (c->requests,
+ &req->peer,
+ car,
+ GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_FAST));
+ car->client_handle = c;
+ }
+ else
+ {
+ /* dequeue and recycle memory from pending request, there can only
+ be at most one per client and peer */
+ GNUNET_STATISTICS_update (GSC_stats,
+ gettext_noop ("# dequeuing CAR (duplicate request)"),
+ 1,
+ GNUNET_NO);
+ GSC_SESSIONS_dequeue_request (car);
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Transmission request to `%s' was a duplicate!\n",
+ GNUNET_i2s (&req->peer));
+ }
+ car->target = req->peer;
+ car->received_time = GNUNET_TIME_absolute_get ();
+ car->deadline = GNUNET_TIME_absolute_ntoh (req->deadline);
+ car->priority = (enum GNUNET_CORE_Priority) ntohl (req->priority);
+ car->msize = ntohs (req->size);
+ car->smr_id = req->smr_id;
+ car->was_solicited = GNUNET_NO;
+ GNUNET_SERVICE_client_continue (c->client);
+ if (is_loopback)
+ {
+ /* loopback, satisfy immediately */
+ GSC_CLIENTS_solicit_request (car);
+ return;
+ }
+ GSC_SESSIONS_queue_request (car);
}
+/**
+ * Closure for the #client_tokenizer_callback().
+ */
+struct TokenizerContext
+{
+
+ /**
+ * Active request handle for the message.
+ */
+ struct GSC_ClientActiveRequest *car;
+
+ /**
+ * How important is this message.
+ */
+ enum GNUNET_CORE_Priority priority;
+
+ /**
+ * Is corking allowed (set only once we have the real message).
+ */
+ int cork;
+
+};
+
+
+/**
+ * Functions with this signature are called whenever a complete
+ * message is received by the tokenizer. Used by
+ * #handle_client_send() for dispatching messages from clients to
+ * either the SESSION subsystem or other CLIENT (for loopback).
+ *
+ * @param cls reservation request (`struct TokenizerContext`)
+ * @param message the actual message
+ * @return #GNUNET_OK on success,
+ * #GNUNET_NO to stop further processing (no error)
+ * #GNUNET_SYSERR to stop further processing with error
+ */
+static int
+tokenized_cb (void *cls,
+ const struct GNUNET_MessageHeader *message)
+{
+ struct TokenizerContext *tc = cls;
+ struct GSC_ClientActiveRequest *car = tc->car;
+ char buf[92];
+
+ GNUNET_snprintf (buf,
+ sizeof (buf),
+ gettext_noop ("# bytes of messages of type %u received"),
+ (unsigned int) ntohs (message->type));
+ GNUNET_STATISTICS_update (GSC_stats,
+ buf,
+ ntohs (message->size),
+ GNUNET_NO);
+ if (0 ==
+ memcmp (&car->target,
+ &GSC_my_identity,
+ sizeof (struct GNUNET_PeerIdentity)))
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Delivering message of type %u to myself\n",
+ ntohs (message->type));
+ GSC_CLIENTS_deliver_message (&GSC_my_identity,
+ message,
+ ntohs (message->size),
+ GNUNET_CORE_OPTION_SEND_FULL_OUTBOUND);
+ GSC_CLIENTS_deliver_message (&GSC_my_identity,
+ message,
+ sizeof (struct GNUNET_MessageHeader),
+ GNUNET_CORE_OPTION_SEND_HDR_OUTBOUND);
+ GSC_CLIENTS_deliver_message (&GSC_my_identity,
+ message,
+ ntohs (message->size),
+ GNUNET_CORE_OPTION_SEND_FULL_INBOUND);
+ GSC_CLIENTS_deliver_message (&GSC_my_identity,
+ message,
+ sizeof (struct GNUNET_MessageHeader),
+ GNUNET_CORE_OPTION_SEND_HDR_INBOUND);
+ }
+ else
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Delivering message of type %u and size %u to %s\n",
+ ntohs (message->type),
+ ntohs (message->size),
+ GNUNET_i2s (&car->target));
+ GSC_CLIENTS_deliver_message (&car->target,
+ message,
+ ntohs (message->size),
+ GNUNET_CORE_OPTION_SEND_FULL_OUTBOUND);
+ GSC_CLIENTS_deliver_message (&car->target,
+ message,
+ sizeof (struct GNUNET_MessageHeader),
+ GNUNET_CORE_OPTION_SEND_HDR_OUTBOUND);
+ GSC_SESSIONS_transmit (car,
+ message,
+ tc->cork,
+ tc->priority);
+ }
+ return GNUNET_OK;
+}
+
+
+/**
+ * Check #GNUNET_MESSAGE_TYPE_CORE_SEND request.
+ *
+ * @param cls the `struct GSC_Client`
+ * @param sm the `struct SendMessage`
+ * @return #GNUNET_OK if @a sm is well-formed
+ */
+static int
+check_client_send (void *cls,
+ const struct SendMessage *sm)
+{
+ return GNUNET_OK;
+}
+
/**
- * Callback for hostkey read/generation
+ * Handle #GNUNET_MESSAGE_TYPE_CORE_SEND request.
+ *
+ * @param cls the `struct GSC_Client`
+ * @param sm the `struct SendMessage`
+ */
+static void
+handle_client_send (void *cls,
+ const struct SendMessage *sm)
+{
+ struct GSC_Client *c = cls;
+ struct TokenizerContext tc;
+ uint16_t msize;
+ struct GNUNET_TIME_Relative delay;
+ struct GNUNET_MessageStreamTokenizer *mst;
+
+ msize = ntohs (sm->header.size) - sizeof (struct SendMessage);
+ GNUNET_break (0 == ntohl (sm->reserved));
+ tc.car = GNUNET_CONTAINER_multipeermap_get (c->requests,
+ &sm->peer);
+ if (NULL == tc.car)
+ {
+ /* Must have been that we first approved the request, then got disconnected
+ * (which triggered removal of the 'car') and now the client gives us a message
+ * just *before* the client learns about the disconnect. Theoretically, we
+ * might also now be *again* connected. So this can happen (but should be
+ * rare). If it does happen, the message is discarded. */
+ GNUNET_STATISTICS_update (GSC_stats,
+ gettext_noop ("# messages discarded (session disconnected)"),
+ 1,
+ GNUNET_NO);
+ GNUNET_SERVICE_client_continue (c->client);
+ return;
+ }
+ delay = GNUNET_TIME_absolute_get_duration (tc.car->received_time);
+ tc.cork = ntohl (sm->cork);
+ tc.priority = (enum GNUNET_CORE_Priority) ntohl (sm->priority);
+ if (delay.rel_value_us > GNUNET_CONSTANTS_LATENCY_WARN.rel_value_us)
+ GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
+ "Client waited %s for transmission of %u bytes to `%s'%s\n",
+ GNUNET_STRINGS_relative_time_to_string (delay,
+ GNUNET_YES),
+ msize,
+ GNUNET_i2s (&sm->peer),
+ tc.cork ? " (cork)" : " (uncorked)");
+ else
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Client waited %s for transmission of %u bytes to `%s'%s\n",
+ GNUNET_STRINGS_relative_time_to_string (delay,
+ GNUNET_YES),
+ msize,
+ GNUNET_i2s (&sm->peer),
+ tc.cork ? " (cork)" : " (uncorked)");
+
+ GNUNET_assert (GNUNET_YES ==
+ GNUNET_CONTAINER_multipeermap_remove (c->requests,
+ &sm->peer,
+ tc.car));
+ mst = GNUNET_MST_create (&tokenized_cb,
+ &tc);
+ GNUNET_MST_from_buffer (mst,
+ (const char *) &sm[1],
+ msize,
+ GNUNET_YES,
+ GNUNET_NO);
+ GNUNET_MST_destroy (mst);
+ GSC_SESSIONS_dequeue_request (tc.car);
+ GNUNET_free (tc.car);
+ GNUNET_SERVICE_client_continue (c->client);
+}
+
+
+/**
+ * Free client request records.
*
* @param cls NULL
- * @param pk the private key
- * @param emsg error message
+ * @param key identity of peer for which this is an active request
+ * @param value the `struct GSC_ClientActiveRequest` to free
+ * @return #GNUNET_YES (continue iteration)
+ */
+static int
+destroy_active_client_request (void *cls,
+ const struct GNUNET_PeerIdentity *key,
+ void *value)
+{
+ struct GSC_ClientActiveRequest *car = value;
+
+ GNUNET_assert (GNUNET_YES ==
+ GNUNET_CONTAINER_multipeermap_remove (car->
+ client_handle->requests,
+ &car->target,
+ car));
+ GSC_SESSIONS_dequeue_request (car);
+ GNUNET_free (car);
+ return GNUNET_YES;
+}
+
+
+/**
+ * A client connected, set up.
+ *
+ * @param cls closure
+ * @param client identification of the client
+ * @param mq message queue to talk to @a client
+ * @return our client handle
+ */
+static void *
+client_connect_cb (void *cls,
+ struct GNUNET_SERVICE_Client *client,
+ struct GNUNET_MQ_Handle *mq)
+{
+ struct GSC_Client *c;
+
+ c = GNUNET_new (struct GSC_Client);
+ c->client = client;
+ c->mq = mq;
+ c->connectmap = GNUNET_CONTAINER_multipeermap_create (16,
+ GNUNET_NO);
+ GNUNET_CONTAINER_DLL_insert (client_head,
+ client_tail,
+ c);
+ return c;
+}
+
+
+/**
+ * A client disconnected, clean up.
+ *
+ * @param cls closure
+ * @param client identification of the client
+ * @param app_ctx our `struct GST_Client` for @a client
*/
static void
-key_generation_cb (void *cls,
- struct GNUNET_CRYPTO_EccPrivateKey *pk,
- const char *emsg)
+client_disconnect_cb (void *cls,
+ struct GNUNET_SERVICE_Client *client,
+ void *app_ctx)
{
- keygen = NULL;
- if (NULL == pk)
+ struct GSC_Client *c = app_ctx;
+
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Client %p has disconnected from core service.\n",
+ client);
+ GNUNET_CONTAINER_DLL_remove (client_head,
+ client_tail,
+ c);
+ if (NULL != c->requests)
{
- GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
- _("Failed to read or generate private key: %s\n"),
- emsg);
- GNUNET_SCHEDULER_shutdown ();
+ GNUNET_CONTAINER_multipeermap_iterate (c->requests,
+ &destroy_active_client_request,
+ NULL);
+ GNUNET_CONTAINER_multipeermap_destroy (c->requests);
+ }
+ GNUNET_CONTAINER_multipeermap_destroy (c->connectmap);
+ c->connectmap = NULL;
+ if (NULL != c->types)
+ {
+ GSC_TYPEMAP_remove (c->types,
+ c->tcnt);
+ GNUNET_free (c->types);
+ }
+ GNUNET_free (c);
+
+ /* recalculate 'all_client_options' */
+ all_client_options = 0;
+ for (c = client_head; NULL != c ; c = c->next)
+ all_client_options |= c->options;
+}
+
+
+/**
+ * Notify a particular client about a change to existing connection to
+ * one of our neighbours (check if the client is interested). Called
+ * from #GSC_SESSIONS_notify_client_about_sessions().
+ *
+ * @param client client to notify
+ * @param neighbour identity of the neighbour that changed status
+ * @param tmap_old previous type map for the neighbour, NULL for connect
+ * @param tmap_new updated type map for the neighbour, NULL for disconnect
+ */
+void
+GSC_CLIENTS_notify_client_about_neighbour (struct GSC_Client *client,
+ const struct GNUNET_PeerIdentity *neighbour,
+ const struct GSC_TypeMap *tmap_old,
+ const struct GSC_TypeMap *tmap_new)
+{
+ struct GNUNET_MQ_Envelope *env;
+ int old_match;
+ int new_match;
+
+ if (GNUNET_YES != client->got_init)
return;
+ old_match = GSC_TYPEMAP_test_match (tmap_old,
+ client->types,
+ client->tcnt);
+ new_match = GSC_TYPEMAP_test_match (tmap_new,
+ client->types,
+ client->tcnt);
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Notifying client about neighbour %s (%d/%d)\n",
+ GNUNET_i2s (neighbour),
+ old_match,
+ new_match);
+ if (old_match == new_match)
+ {
+ GNUNET_assert (old_match ==
+ GNUNET_CONTAINER_multipeermap_contains (client->connectmap,
+ neighbour));
+ return; /* no change */
}
- if ((GNUNET_OK != GSC_KX_init (pk)) ||
- (GNUNET_OK != GSC_NEIGHBOURS_init ()))
+ if (GNUNET_NO == old_match)
{
- GNUNET_SCHEDULER_shutdown ();
+ struct ConnectNotifyMessage *cnm;
+
+ /* send connect */
+ GNUNET_assert (GNUNET_NO ==
+ GNUNET_CONTAINER_multipeermap_contains (client->connectmap,
+ neighbour));
+ GNUNET_assert (GNUNET_YES ==
+ GNUNET_CONTAINER_multipeermap_put (client->connectmap,
+ neighbour,
+ NULL,
+ GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY));
+ env = GNUNET_MQ_msg (cnm,
+ GNUNET_MESSAGE_TYPE_CORE_NOTIFY_CONNECT);
+ cnm->reserved = htonl (0);
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Sending NOTIFY_CONNECT message about peer %s to client.\n",
+ GNUNET_i2s (neighbour));
+ cnm->peer = *neighbour;
+ GNUNET_MQ_send (client->mq,
+ env);
+ }
+ else
+ {
+ struct DisconnectNotifyMessage *dcm;
+
+ /* send disconnect */
+ GNUNET_assert (GNUNET_YES ==
+ GNUNET_CONTAINER_multipeermap_contains (client->connectmap,
+ neighbour));
+ GNUNET_assert (GNUNET_YES ==
+ GNUNET_CONTAINER_multipeermap_remove (client->connectmap,
+ neighbour,
+ NULL));
+ env = GNUNET_MQ_msg (dcm,
+ GNUNET_MESSAGE_TYPE_CORE_NOTIFY_DISCONNECT);
+ dcm->reserved = htonl (0);
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Sending NOTIFY_DISCONNECT message about peer %s to client.\n",
+ GNUNET_i2s (neighbour));
+ dcm->peer = *neighbour;
+ GNUNET_MQ_send (client->mq,
+ env);
+ }
+}
+
+
+/**
+ * Notify all clients about a change to existing session.
+ * Called from SESSIONS whenever there is a change in sessions
+ * or types processed by the respective peer.
+ *
+ * @param neighbour identity of the neighbour that changed status
+ * @param tmap_old previous type map for the neighbour, NULL for connect
+ * @param tmap_new updated type map for the neighbour, NULL for disconnect
+ */
+void
+GSC_CLIENTS_notify_clients_about_neighbour (const struct GNUNET_PeerIdentity *neighbour,
+ const struct GSC_TypeMap *tmap_old,
+ const struct GSC_TypeMap *tmap_new)
+{
+ struct GSC_Client *c;
+
+ for (c = client_head; NULL != c; c = c->next)
+ GSC_CLIENTS_notify_client_about_neighbour (c,
+ neighbour,
+ tmap_old,
+ tmap_new);
+}
+
+
+/**
+ * Deliver P2P message to interested clients. Caller must have checked
+ * that the sending peer actually lists the given message type as one
+ * of its types.
+ *
+ * @param sender peer who sent us the message
+ * @param msg the message
+ * @param msize number of bytes to transmit
+ * @param options options for checking which clients should
+ * receive the message
+ */
+void
+GSC_CLIENTS_deliver_message (const struct GNUNET_PeerIdentity *sender,
+ const struct GNUNET_MessageHeader *msg,
+ uint16_t msize,
+ uint32_t options)
+{
+ size_t size = msize + sizeof (struct NotifyTrafficMessage);
+
+ if (size >= GNUNET_MAX_MESSAGE_SIZE)
+ {
+ GNUNET_break (0);
return;
}
- GSC_SESSIONS_init ();
- GSC_CLIENTS_init (GSC_server);
- GNUNET_SERVER_resume (GSC_server);
- GNUNET_log (GNUNET_ERROR_TYPE_INFO, _("Core service of `%4s' ready.\n"),
- GNUNET_i2s (&GSC_my_identity));
+ if (! ( (0 != (all_client_options & options)) ||
+ (0 != (options & GNUNET_CORE_OPTION_SEND_FULL_INBOUND)) ))
+ return; /* no client cares about this message notification */
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Core service passes message from `%s' of type %u to client.\n",
+ GNUNET_i2s (sender),
+ (unsigned int) ntohs (msg->type));
+ GSC_SESSIONS_add_to_typemap (sender,
+ ntohs (msg->type));
+
+ for (struct GSC_Client *c = client_head; NULL != c; c = c->next)
+ {
+ struct GNUNET_MQ_Envelope *env;
+ struct NotifyTrafficMessage *ntm;
+ uint16_t mtype;
+ unsigned int qlen;
+ int tm;
+
+ tm = type_match (ntohs (msg->type),
+ c);
+ if (! ( (0 != (c->options & options)) ||
+ ( (0 != (options & GNUNET_CORE_OPTION_SEND_FULL_INBOUND)) &&
+ (GNUNET_YES == tm) ) ) )
+ continue; /* neither options nor type match permit the message */
+ if ( (0 != (options & GNUNET_CORE_OPTION_SEND_HDR_INBOUND)) &&
+ ( (0 != (c->options & GNUNET_CORE_OPTION_SEND_FULL_INBOUND)) ||
+ (GNUNET_YES == tm) ) )
+ continue;
+ if ( (0 != (options & GNUNET_CORE_OPTION_SEND_HDR_OUTBOUND)) &&
+ (0 != (c->options & GNUNET_CORE_OPTION_SEND_FULL_OUTBOUND)) )
+ continue;
+
+ /* Drop messages if:
+ 1) We are above the hard limit, or
+ 2) We are above the soft limit, and a coin toss limited
+ to the message size (giving larger messages a
+ proportionally higher chance of being queued) falls
+ below the threshold. The threshold is based on where
+ we are between the soft and the hard limit, scaled
+ to match the range of message sizes we usually encounter
+ (i.e. up to 32k); so a 64k message has a 50% chance of
+ being kept if we are just barely below the hard max,
+ and a 99% chance of being kept if we are at the soft max.
+ The reason is to make it more likely to drop control traffic
+ (ACK, queries) which may be cummulative or highly redundant,
+ and cheap to drop than data traffic. */
+ qlen = GNUNET_MQ_get_length (c->mq);
+ if ( (qlen >= HARD_MAX_QUEUE) ||
+ ( (qlen > SOFT_MAX_QUEUE) &&
+ ( (GNUNET_CRYPTO_random_u32 (GNUNET_CRYPTO_QUALITY_WEAK,
+ ntohs (msg->size)) ) <
+ (qlen - SOFT_MAX_QUEUE) * 0x8000 /
+ (HARD_MAX_QUEUE - SOFT_MAX_QUEUE) ) ) )
+ {
+ char buf[1024];
+
+ GNUNET_log (GNUNET_ERROR_TYPE_INFO | GNUNET_ERROR_TYPE_BULK,
+ "Dropping decrypted message of type %u as client is too busy (queue full)\n",
+ (unsigned int) ntohs (msg->type));
+ GNUNET_snprintf (buf,
+ sizeof (buf),
+ gettext_noop ("# messages of type %u discarded (client busy)"),
+ (unsigned int) ntohs (msg->type));
+ GNUNET_STATISTICS_update (GSC_stats,
+ buf,
+ 1,
+ GNUNET_NO);
+ continue;
+ }
+
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Sending %u message with %u bytes to client interested in messages of type %u.\n",
+ options,
+ ntohs (msg->size),
+ (unsigned int) ntohs (msg->type));
+
+ if (0 != (options & (GNUNET_CORE_OPTION_SEND_FULL_INBOUND | GNUNET_CORE_OPTION_SEND_HDR_INBOUND)))
+ mtype = GNUNET_MESSAGE_TYPE_CORE_NOTIFY_INBOUND;
+ else
+ mtype = GNUNET_MESSAGE_TYPE_CORE_NOTIFY_OUTBOUND;
+ env = GNUNET_MQ_msg_extra (ntm,
+ msize,
+ mtype);
+ ntm->peer = *sender;
+ GNUNET_memcpy (&ntm[1],
+ msg,
+ msize);
+
+ GNUNET_assert ( (0 == (c->options & GNUNET_CORE_OPTION_SEND_FULL_INBOUND)) ||
+ (GNUNET_YES != tm) ||
+ (GNUNET_YES ==
+ GNUNET_CONTAINER_multipeermap_contains (c->connectmap,
+ sender)) );
+ GNUNET_MQ_send (c->mq,
+ env);
+ }
+}
+
+
+/**
+ * Last task run during shutdown. Disconnects us from
+ * the transport.
+ *
+ * @param cls NULL, unused
+ */
+static void
+shutdown_task (void *cls)
+{
+ struct GSC_Client *c;
+
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Core service shutting down.\n");
+ while (NULL != (c = client_head))
+ GNUNET_SERVICE_client_drop (c->client);
+ GSC_SESSIONS_done ();
+ GSC_KX_done ();
+ GSC_TYPEMAP_done ();
+ if (NULL != GSC_stats)
+ {
+ GNUNET_STATISTICS_destroy (GSC_stats,
+ GNUNET_NO);
+ GSC_stats = NULL;
+ }
+ GSC_cfg = NULL;
+}
+
+
+/**
+ * Handle #GNUNET_MESSAGE_TYPE_CORE_MONITOR_PEERS request. For this
+ * request type, the client does not have to have transmitted an INIT
+ * request. All current peers are returned, regardless of which
+ * message types they accept.
+ *
+ * @param cls client sending the iteration request
+ * @param message iteration request message
+ */
+static void
+handle_client_monitor_peers (void *cls,
+ const struct GNUNET_MessageHeader *message)
+{
+ struct GSC_Client *c = cls;
+
+ GNUNET_SERVICE_client_continue (c->client);
+ GSC_KX_handle_client_monitor_peers (c->mq);
}
* Initiate core service.
*
* @param cls closure
- * @param server the initialized server
* @param c configuration to use
+ * @param service the initialized service
*/
static void
-run (void *cls, struct GNUNET_SERVER_Handle *server,
- const struct GNUNET_CONFIGURATION_Handle *c)
+run (void *cls,
+ const struct GNUNET_CONFIGURATION_Handle *c,
+ struct GNUNET_SERVICE_Handle *service)
{
+ struct GNUNET_CRYPTO_EddsaPrivateKey *pk;
char *keyfile;
GSC_cfg = c;
- GSC_server = server;
if (GNUNET_OK !=
- GNUNET_CONFIGURATION_get_value_filename (GSC_cfg, "PEER", "PRIVATE_KEY",
+ GNUNET_CONFIGURATION_get_value_filename (GSC_cfg,
+ "PEER",
+ "PRIVATE_KEY",
&keyfile))
{
GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
- _
- ("Core service is lacking HOSTKEY configuration setting. Exiting.\n"));
+ _("Core service is lacking HOSTKEY configuration setting. Exiting.\n"));
GNUNET_SCHEDULER_shutdown ();
return;
}
- GSC_stats = GNUNET_STATISTICS_create ("core", GSC_cfg);
- GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_FOREVER_REL, &shutdown_task,
- NULL);
- GNUNET_SERVER_suspend (server);
+ GSC_stats = GNUNET_STATISTICS_create ("core",
+ GSC_cfg);
+ GNUNET_SCHEDULER_add_shutdown (&shutdown_task,
+ NULL);
+ GNUNET_SERVICE_suspend (service);
GSC_TYPEMAP_init ();
- keygen = GNUNET_CRYPTO_ecc_key_create_start (keyfile, &key_generation_cb, NULL);
+ pk = GNUNET_CRYPTO_eddsa_key_create_from_file (keyfile);
GNUNET_free (keyfile);
- if (NULL == keygen)
+ GNUNET_assert (NULL != pk);
+ if (GNUNET_OK != GSC_KX_init (pk))
{
- GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
- _("Transport service is unable to access hostkey. Exiting.\n"));
GNUNET_SCHEDULER_shutdown ();
+ return;
}
+ GSC_SESSIONS_init ();
+ GNUNET_SERVICE_resume (service);
+ GNUNET_log (GNUNET_ERROR_TYPE_INFO,
+ _("Core service of `%s' ready.\n"),
+ GNUNET_i2s (&GSC_my_identity));
}
/**
- * The main function for the transport service.
- *
- * @param argc number of arguments from the command line
- * @param argv command line arguments
- * @return 0 ok, 1 on error
+ * Define "main" method using service macro.
*/
-int
-main (int argc, char *const *argv)
-{
- return (GNUNET_OK ==
- GNUNET_SERVICE_run (argc, argv, "core", GNUNET_SERVICE_OPTION_NONE,
- &run, NULL)) ? 0 : 1;
-}
+GNUNET_SERVICE_MAIN
+("core",
+ GNUNET_SERVICE_OPTION_NONE,
+ &run,
+ &client_connect_cb,
+ &client_disconnect_cb,
+ NULL,
+ GNUNET_MQ_hd_var_size (client_init,
+ GNUNET_MESSAGE_TYPE_CORE_INIT,
+ struct InitMessage,
+ NULL),
+ GNUNET_MQ_hd_fixed_size (client_monitor_peers,
+ GNUNET_MESSAGE_TYPE_CORE_MONITOR_PEERS,
+ struct GNUNET_MessageHeader,
+ NULL),
+ GNUNET_MQ_hd_fixed_size (client_send_request,
+ GNUNET_MESSAGE_TYPE_CORE_SEND_REQUEST,
+ struct SendMessageRequest,
+ NULL),
+ GNUNET_MQ_hd_var_size (client_send,
+ GNUNET_MESSAGE_TYPE_CORE_SEND,
+ struct SendMessage,
+ NULL),
+ GNUNET_MQ_handler_end ());
+
/* end of gnunet-service-core.c */
projects / oweals / gnunet.git / blobdiff