/*
This file is part of GNUnet.
- (C) 2011 Christian Grothoff (and other contributing authors)
+ Copyright (C) 2011-2014 Christian Grothoff (and other contributing authors)
GNUnet is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published
* @file ats/gnunet-service-ats_scheduling.c
* @brief ats service, interaction with 'scheduling' API
* @author Matthias Wachs
+ * @author Christian Grothoff
*/
#include "platform.h"
#include "gnunet-service-ats_addresses.h"
#include "ats.h"
-struct SchedulingClient
-{
- struct SchedulingClient * next;
-
- struct SchedulingClient * prev;
-
- struct GNUNET_SERVER_Client *client;
-
-};
-
-
/**
- * Head of linked list of all clients to this service.
+ * Context for sending messages to clients.
*/
-static struct SchedulingClient *sc_head;
+static struct GNUNET_SERVER_NotificationContext *nc;
/**
- * Tail of linked list of all clients to this service.
+ * Actual handle to the client.
*/
-static struct SchedulingClient *sc_tail;
+static struct GNUNET_SERVER_Client *my_client;
-static struct SchedulingClient *
-find_client (struct GNUNET_SERVER_Client *client)
+/**
+ * Register a new scheduling client.
+ *
+ * @param client handle of the new client
+ * @return #GNUNET_OK on success, #GNUNET_SYSERR on error
+ */
+int
+GAS_scheduling_add_client (struct GNUNET_SERVER_Client *client)
{
- struct SchedulingClient * sc;
-
- for (sc = sc_head; sc != NULL; sc = sc->next)
- if (sc->client == client)
- return sc;
- return NULL;
+ if (NULL != my_client)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "This ATS already has a scheduling client, refusing new scheduling client for now.\n");
+ return GNUNET_SYSERR;
+ }
+ my_client = client;
+ GNUNET_SERVER_notification_context_add (nc,
+ client);
+ GNUNET_SERVER_client_set_user_context (client,
+ &nc);
+ return GNUNET_OK;
}
+/**
+ * Unregister a client (which may have been a scheduling client,
+ * but this is not assured).
+ *
+ * @param client handle of the (now dead) client
+ */
void
-GAS_add_scheduling_client (struct GNUNET_SERVER_Client *client)
+GAS_scheduling_remove_client (struct GNUNET_SERVER_Client *client)
{
- struct SchedulingClient *sc;
-
- GNUNET_break (NULL == find_client (client));
- sc = GNUNET_malloc (sizeof (struct SchedulingClient));
- sc->client = client;
- GNUNET_SERVER_client_keep (client);
- GNUNET_CONTAINER_DLL_insert(sc_head, sc_tail, sc);
+ if (my_client != client)
+ return;
+ GAS_addresses_destroy_all ();
+ my_client = NULL;
}
+/**
+ * Transmit the given address suggestion and bandwidth update to all scheduling
+ * clients.
+ *
+ * @param peer peer for which this is an address suggestion
+ * @param session_id session ID to use for the given client
+ * @param bandwidth_out assigned outbound bandwidth
+ * @param bandwidth_in assigned inbound bandwidth
+ */
void
-GAS_remove_scheduling_client (struct GNUNET_SERVER_Client *client)
+GAS_scheduling_transmit_address_suggestion (const struct GNUNET_PeerIdentity *peer,
+ uint32_t session_id,
+ struct GNUNET_BANDWIDTH_Value32NBO bandwidth_out,
+ struct GNUNET_BANDWIDTH_Value32NBO bandwidth_in)
{
- struct SchedulingClient * sc;
+ struct AddressSuggestionMessage msg;
- sc = find_client (client);
- if (NULL == sc)
+ if (NULL == my_client)
return;
- GNUNET_CONTAINER_DLL_remove (sc_head, sc_tail, sc);
- GNUNET_SERVER_client_drop (client);
- GNUNET_free (sc);
+ GNUNET_STATISTICS_update (GSA_stats,
+ "# address suggestions made",
+ 1,
+ GNUNET_NO);
+ msg.header.size = htons (sizeof (struct AddressSuggestionMessage));
+ msg.header.type = htons (GNUNET_MESSAGE_TYPE_ATS_ADDRESS_SUGGESTION);
+ msg.peer = *peer;
+ msg.session_id = htonl (session_id);
+ msg.bandwidth_out = bandwidth_out;
+ msg.bandwidth_in = bandwidth_in;
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "ATS sends quota for peer `%s': (in/out) %u/%u\n",
+ GNUNET_i2s (peer),
+ (unsigned int) ntohl (bandwidth_in.value__),
+ (unsigned int) ntohl (bandwidth_out.value__));
+ GNUNET_SERVER_notification_context_unicast (nc,
+ my_client,
+ &msg.header,
+ GNUNET_YES);
}
+/**
+ * Handle 'address add' messages from clients.
+ *
+ * @param cls unused, NULL
+ * @param client client that sent the request
+ * @param message the request message
+ */
void
-GAS_handle_request_address (void *cls, struct GNUNET_SERVER_Client *client,
- const struct GNUNET_MessageHeader *message)
-
+GAS_handle_address_add (void *cls,
+ struct GNUNET_SERVER_Client *client,
+ const struct GNUNET_MessageHeader *message)
{
- // struct RequestAddressMessage * msg = (struct RequestAddressMessage *) message;
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received `%s' message\n", "REQUEST_ADDRESS");
+ const struct AddressAddMessage *m;
+ const struct GNUNET_ATS_Information *atsi;
+ const char *address;
+ const char *plugin_name;
+ uint16_t address_length;
+ uint16_t plugin_name_length;
+ uint32_t ats_count;
+ uint16_t size;
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Received `%s' message\n",
+ "ADDRESS_ADD");
+ size = ntohs (message->size);
+ if (size < sizeof (struct AddressAddMessage))
+ {
+ GNUNET_break (0);
+ GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
+ return;
+ }
+ m = (const struct AddressAddMessage *) message;
+ ats_count = ntohl (m->ats_count);
+ address_length = ntohs (m->address_length);
+ plugin_name_length = ntohs (m->plugin_name_length);
+ atsi = (const struct GNUNET_ATS_Information *) &m[1];
+ address = (const char *) &atsi[ats_count];
+ if (plugin_name_length != 0)
+ plugin_name = &address[address_length];
+ else
+ plugin_name = "";
+
+ if ((address_length + plugin_name_length +
+ ats_count * sizeof (struct GNUNET_ATS_Information) +
+ sizeof (struct AddressAddMessage) != ntohs (message->size)) ||
+ (ats_count >
+ GNUNET_SERVER_MAX_MESSAGE_SIZE / sizeof (struct GNUNET_ATS_Information)) ||
+ ((plugin_name_length > 0) && (plugin_name[plugin_name_length - 1] != '\0')))
+ {
+ GNUNET_break (0);
+ GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
+ return;
+ }
+ GNUNET_STATISTICS_update (GSA_stats,
+ "# addresses created", 1,
+ GNUNET_NO);
+ GAS_addresses_add (&m->peer,
+ plugin_name,
+ address,
+ address_length,
+ ntohl (m->address_local_info),
+ ntohl (m->session_id),
+ atsi, ats_count);
+ GNUNET_SERVER_receive_done (client, GNUNET_OK);
}
+/**
+ * Handle 'address update' messages from clients.
+ *
+ * @param cls unused, NULL
+ * @param client client that sent the request
+ * @param message the request message
+ */
void
-GAS_handle_address_update (void *cls, struct GNUNET_SERVER_Client *client,
- const struct GNUNET_MessageHeader *message)
-
+GAS_handle_address_update (void *cls,
+ struct GNUNET_SERVER_Client *client,
+ const struct GNUNET_MessageHeader *message)
{
- const struct AddressUpdateMessage * m;
- const struct GNUNET_TRANSPORT_ATS_Information *atsi;
- const char *address;
- const char *plugin_name;
- uint16_t address_length;
- uint16_t plugin_name_length;
+ const struct AddressUpdateMessage *m;
+ const struct GNUNET_ATS_Information *atsi;
uint32_t ats_count;
uint16_t size;
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Received `%s' message\n",
- "ADDRESS_UPDATE");
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Received `%s' message\n",
+ "ADDRESS_UPDATE");
size = ntohs (message->size);
- if (size <= sizeof (struct AddressUpdateMessage))
+ if (size < sizeof (struct AddressUpdateMessage))
{
GNUNET_break (0);
GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
return;
}
- m = (const struct AddressUpdateMessage*) message;
+ m = (const struct AddressUpdateMessage *) message;
ats_count = ntohl (m->ats_count);
- address_length = ntohs (m->address_length);
- plugin_name_length = ntohs (m->plugin_name_length);
- atsi = (const struct GNUNET_TRANSPORT_ATS_Information*) &m[1];
- address = (const char*) &atsi[ats_count];
- plugin_name = &address[address_length];
- if ( (address_length +
- plugin_name_length +
- ats_count * sizeof (struct GNUNET_TRANSPORT_ATS_Information) +
- sizeof (struct AddressSuggestionMessage) != ntohs (message->size)) ||
- (ats_count > GNUNET_SERVER_MAX_MESSAGE_SIZE / sizeof (struct GNUNET_TRANSPORT_ATS_Information)) ||
- (plugin_name[plugin_name_length - 1] != '\0') )
+ atsi = (const struct GNUNET_ATS_Information *) &m[1];
+
+ if ((ats_count * sizeof (struct GNUNET_ATS_Information) +
+ sizeof (struct AddressUpdateMessage) != ntohs (message->size)) ||
+ (ats_count >
+ GNUNET_SERVER_MAX_MESSAGE_SIZE / sizeof (struct GNUNET_ATS_Information)))
{
GNUNET_break (0);
GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
return;
}
- GAS_address_update (client,
- &m->peer,
- plugin_name,
- address,
- address_length,
- ntohl (m->session_id),
- atsi,
- ats_count);
+ GNUNET_STATISTICS_update (GSA_stats,
+ "# address updates received",
+ 1,
+ GNUNET_NO);
+ GAS_addresses_update (&m->peer,
+ ntohl (m->session_id),
+ atsi, ats_count);
+ GNUNET_SERVER_receive_done (client, GNUNET_OK);
+}
+
+
+/**
+ * Handle 'address destroyed' messages from clients.
+ *
+ * @param cls unused, NULL
+ * @param client client that sent the request
+ * @param message the request message
+ */
+void
+GAS_handle_address_destroyed (void *cls,
+ struct GNUNET_SERVER_Client *client,
+ const struct GNUNET_MessageHeader *message)
+{
+ const struct AddressDestroyedMessage *m;
+ struct SessionReleaseMessage srm;
+
+ m = (const struct AddressDestroyedMessage *) message;
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Received `%s' message\n",
+ "ADDRESS_DESTROYED");
+ GNUNET_STATISTICS_update (GSA_stats,
+ "# addresses destroyed",
+ 1,
+ GNUNET_NO);
+ GAS_addresses_destroy (&m->peer,
+ ntohl (m->session_id));
+ srm.header.type = ntohs (GNUNET_MESSAGE_TYPE_ATS_SESSION_RELEASE);
+ srm.header.size = ntohs (sizeof (struct SessionReleaseMessage));
+ srm.session_id = m->session_id;
+ srm.peer = m->peer;
+ GNUNET_SERVER_notification_context_unicast (nc,
+ client,
+ &srm.header,
+ GNUNET_NO);
GNUNET_SERVER_receive_done (client, GNUNET_OK);
}
+/**
+ * Initialize scheduling subsystem.
+ *
+ * @param server handle to our server
+ * @param ah the address handle to use
+ */
void
-GAS_handle_address_destroyed (void *cls, struct GNUNET_SERVER_Client *client,
- const struct GNUNET_MessageHeader *message)
+GAS_scheduling_init (struct GNUNET_SERVER_Handle *server)
+{
+ nc = GNUNET_SERVER_notification_context_create (server, 128);
+}
+
+/**
+ * Shutdown scheduling subsystem.
+ */
+void
+GAS_scheduling_done ()
{
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received `%s' message\n", "ADDRESS_DESTROYED");
+ if (NULL != my_client)
+ {
+ my_client = NULL;
+ }
+ GNUNET_SERVER_notification_context_destroy (nc);
+ nc = NULL;
}
+
/* end of gnunet-service-ats_scheduling.c */