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diff --git a/src/ats/gnunet-service-ats_performance.c b/src/ats/gnunet-service-ats_performance.c
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+/*
+ This file is part of GNUnet.
+ (C) 2011 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
+ 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., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA.
+*/
+
+/**
+ * @file ats/gnunet-service-ats_performance.c
+ * @brief ats service, interaction with 'performance' API
+ * @author Matthias Wachs
+ * @author Christian Grothoff
+ */
+#include "platform.h"
+#include "gnunet-service-ats.h"
+#include "gnunet-service-ats_addresses.h"
+#include "gnunet-service-ats_performance.h"
+#include "gnunet-service-ats_reservations.h"
+#include "ats.h"
+
+
+/**
+ * We keep clients that are interested in performance in a linked list.
+ */
+struct PerformanceClient
+{
+ /**
+ * Next in doubly-linked list.
+ */
+ struct PerformanceClient *next;
+
+ /**
+ * Previous in doubly-linked list.
+ */
+ struct PerformanceClient *prev;
+
+ /**
+ * Actual handle to the client.
+ */
+ struct GNUNET_SERVER_Client *client;
+
+ /**
+ * Options for the client.
+ */
+ enum StartFlag flag;
+
+};
+
+
+/**
+ * Head of linked list of all clients to this service.
+ */
+static struct PerformanceClient *pc_head;
+
+/**
+ * Tail of linked list of all clients to this service.
+ */
+static struct PerformanceClient *pc_tail;
+
+/**
+ * Context for sending messages to performance clients.
+ */
+static struct GNUNET_SERVER_NotificationContext *nc;
+
+
+/**
+ * Find the performance client associated with the given handle.
+ *
+ * @param client server handle
+ * @return internal handle
+ */
+static struct PerformanceClient *
+find_client (struct GNUNET_SERVER_Client *client)
+{
+ struct PerformanceClient *pc;
+
+ for (pc = pc_head; pc != NULL; pc = pc->next)
+ if (pc->client == client)
+ return pc;
+ return NULL;
+}
+
+
+/**
+ * Register a new performance client.
+ *
+ * @param client handle of the new client
+ * @param flag flag specifying the type of the client
+ */
+void
+GAS_performance_add_client (struct GNUNET_SERVER_Client *client,
+ enum StartFlag flag)
+{
+ struct PerformanceClient *pc;
+
+ GNUNET_break (NULL == find_client (client));
+ pc = GNUNET_malloc (sizeof (struct PerformanceClient));
+ pc->client = client;
+ pc->flag = flag;
+ GNUNET_SERVER_notification_context_add (nc, client);
+ GNUNET_SERVER_client_keep (client);
+ GNUNET_CONTAINER_DLL_insert (pc_head, pc_tail, pc);
+}
+
+
+/**
+ * Unregister a client (which may have been a performance client,
+ * but this is not assured).
+ *
+ * @param client handle of the (now dead) client
+ */
+void
+GAS_performance_remove_client (struct GNUNET_SERVER_Client *client)
+{
+ struct PerformanceClient *pc;
+
+ pc = find_client (client);
+ if (NULL == pc)
+ return;
+ GNUNET_CONTAINER_DLL_remove (pc_head, pc_tail, pc);
+ GNUNET_SERVER_client_drop (client);
+ GNUNET_free (pc);
+}
+
+
+/**
+ * Transmit the given performance information to all performance
+ * clients.
+ *
+ * @param peer peer for which this is an address suggestion
+ * @param plugin_name 0-termintated string specifying the transport plugin
+ * @param plugin_addr binary address for the plugin to use
+ * @param plugin_addr_len number of bytes in plugin_addr
+ * @param atsi performance data for the address
+ * @param atsi_count number of performance records in 'ats'
+ * @param bandwidth_out assigned outbound bandwidth
+ * @param bandwidth_in assigned inbound bandwidth
+ */
+void
+GAS_performance_notify_clients (const struct GNUNET_PeerIdentity *peer,
+ const char *plugin_name,
+ const void *plugin_addr, size_t plugin_addr_len,
+ const struct GNUNET_ATS_Information *atsi,
+ uint32_t atsi_count,
+ struct GNUNET_BANDWIDTH_Value32NBO
+ bandwidth_out,
+ struct GNUNET_BANDWIDTH_Value32NBO bandwidth_in)
+{
+ struct PerformanceClient *pc;
+ struct PeerInformationMessage *msg;
+ size_t plugin_name_length = strlen (plugin_name) + 1;
+ size_t msize =
+ sizeof (struct PeerInformationMessage) +
+ atsi_count * sizeof (struct GNUNET_ATS_Information) + plugin_addr_len +
+ plugin_name_length;
+ char buf[msize];
+ struct GNUNET_ATS_Information *atsp;
+ char *addrp;
+
+ GNUNET_assert (msize < GNUNET_SERVER_MAX_MESSAGE_SIZE);
+ GNUNET_assert (atsi_count <
+ GNUNET_SERVER_MAX_MESSAGE_SIZE /
+ sizeof (struct GNUNET_ATS_Information));
+ msg = (struct PeerInformationMessage *) buf;
+ msg->header.size = htons (msize);
+ msg->header.type = htons (GNUNET_MESSAGE_TYPE_ATS_PEER_INFORMATION);
+ msg->ats_count = htonl (atsi_count);
+ msg->peer = *peer;
+ msg->address_length = htons (plugin_addr_len);
+ msg->plugin_name_length = htons (plugin_name_length);
+ msg->bandwidth_out = bandwidth_out;
+ msg->bandwidth_in = bandwidth_in;
+ atsp = (struct GNUNET_ATS_Information *) &msg[1];
+ memcpy (atsp, atsi, sizeof (struct GNUNET_ATS_Information) * atsi_count);
+ addrp = (char *) &atsp[atsi_count];
+ memcpy (addrp, plugin_addr, plugin_addr_len);
+ strcpy (&addrp[plugin_addr_len], plugin_name);
+ for (pc = pc_head; pc != NULL; pc = pc->next)
+ if (pc->flag == START_FLAG_PERFORMANCE_WITH_PIC)
+ {
+ GNUNET_SERVER_notification_context_unicast (nc, pc->client, &msg->header,
+ GNUNET_YES);
+ GNUNET_STATISTICS_update (GSA_stats,
+ "# performance updates given to clients", 1,
+ GNUNET_NO);
+ }
+}
+
+
+/**
+ * Handle 'reservation request' messages from clients.
+ *
+ * @param cls unused, NULL
+ * @param client client that sent the request
+ * @param message the request message
+ */
+void
+GAS_handle_reservation_request (void *cls, struct GNUNET_SERVER_Client *client,
+ const struct GNUNET_MessageHeader *message)
+{
+ const struct ReservationRequestMessage *msg =
+ (const struct ReservationRequestMessage *) message;
+ struct ReservationResultMessage result;
+ int32_t amount;
+ struct GNUNET_TIME_Relative res_delay;
+
+ if (NULL == find_client (client))
+ {
+ /* missing start message! */
+ GNUNET_break (0);
+ GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
+ return;
+ }
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received `%s' message\n",
+ "RESERVATION_REQUEST");
+ amount = (int32_t) ntohl (msg->amount);
+ res_delay = GAS_reservations_reserve (&msg->peer, amount);
+ if (res_delay.rel_value > 0)
+ amount = 0;
+ result.header.size = htons (sizeof (struct ReservationResultMessage));
+ result.header.type = htons (GNUNET_MESSAGE_TYPE_ATS_RESERVATION_RESULT);
+ result.amount = htonl (amount);
+ result.peer = msg->peer;
+ result.res_delay = GNUNET_TIME_relative_hton (res_delay);
+ GNUNET_STATISTICS_update (GSA_stats, "# reservation requests processed", 1,
+ GNUNET_NO);
+ GNUNET_SERVER_notification_context_unicast (nc, client, &result.header,
+ GNUNET_NO);
+ GNUNET_SERVER_receive_done (client, GNUNET_OK);
+}
+
+
+/**
+ * Handle 'preference change' messages from clients.
+ *
+ * @param cls unused, NULL
+ * @param client client that sent the request
+ * @param message the request message
+ */
+void
+GAS_handle_preference_change (void *cls, struct GNUNET_SERVER_Client *client,
+ const struct GNUNET_MessageHeader *message)
+{
+ const struct ChangePreferenceMessage *msg;
+ const struct PreferenceInformation *pi;
+ uint16_t msize;
+ uint32_t nump;
+ uint32_t i;
+
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received `%s' message\n",
+ "PREFERENCE_CHANGE");
+ msize = ntohs (message->size);
+ if (msize < sizeof (struct ChangePreferenceMessage))
+ {
+ GNUNET_break (0);
+ GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
+ return;
+ }
+ msg = (const struct ChangePreferenceMessage *) message;
+ nump = ntohl (msg->num_preferences);
+ if (msize !=
+ sizeof (struct ChangePreferenceMessage) +
+ nump * sizeof (struct PreferenceInformation))
+ {
+ GNUNET_break (0);
+ GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
+ return;
+ }
+ GNUNET_STATISTICS_update (GSA_stats, "# preference change requests processed",
+ 1, GNUNET_NO);
+ pi = (const struct PreferenceInformation *) &msg[1];
+ for (i = 0; i < nump; i++)
+ GAS_addresses_change_preference (&msg->peer,
+ (enum GNUNET_ATS_PreferenceKind)
+ ntohl (pi[i].preference_kind),
+ pi[i].preference_value);
+ GNUNET_SERVER_receive_done (client, GNUNET_OK);
+}
+
+
+/**
+ * Initialize performance subsystem.
+ *
+ * @param server handle to our server
+ */
+void
+GAS_performance_init (struct GNUNET_SERVER_Handle *server)
+{
+ nc = GNUNET_SERVER_notification_context_create (server, 128);
+}
+
+
+/**
+ * Shutdown performance subsystem.
+ */
+void
+GAS_performance_done ()
+{
+ GNUNET_SERVER_notification_context_destroy (nc);
+ nc = NULL;
+}
+
+/* end of gnunet-service-ats_performance.c */
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2024-11-21 14:30:34 +0000