* @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.h"
+#include "gnunet-service-ats_addresses.h"
#include "gnunet-service-ats_scheduling.h"
#include "ats.h"
-struct SchedulingClient
-{
- struct SchedulingClient * next;
-
- struct SchedulingClient * prev;
-
- struct GNUNET_SERVER_Client *client;
+/**
+ * Context for sending messages to clients.
+ */
+static struct GNUNET_SERVER_NotificationContext *nc;
-};
+/**
+ * Actual handle to the client.
+ */
+static struct GNUNET_SERVER_Client *my_client;
/**
- * Head of linked list of all clients to this service.
+ * Handle to address subsystem
*/
-static struct SchedulingClient *sc_head;
+static struct GAS_Addresses_Handle *address_handle;
/**
- * Tail of linked list of all clients to this service.
+ * Register a new scheduling client.
+ *
+ * @param client handle of the new client
+ * @return GNUNET_OK on success, GNUNET_SYSERR on error
*/
-static struct SchedulingClient *sc_tail;
-
-
-static struct SchedulingClient *
-find_client (struct GNUNET_SERVER_Client *client)
+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 (my_client != NULL)
+ {
+ 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);
+ 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 (address_handle);
+ 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 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 session_id session ID to use for the given client (other clients will see 0)
+ * @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_remove_scheduling_client (struct GNUNET_SERVER_Client *client)
+GAS_scheduling_transmit_address_suggestion (const struct GNUNET_PeerIdentity
+ *peer, const char *plugin_name,
+ const void *plugin_addr,
+ size_t plugin_addr_len,
+ uint32_t session_id,
+ const struct GNUNET_ATS_Information
+ *atsi, uint32_t atsi_count,
+ struct GNUNET_BANDWIDTH_Value32NBO
+ bandwidth_out,
+ struct GNUNET_BANDWIDTH_Value32NBO
+ bandwidth_in)
{
- struct SchedulingClient * sc;
-
- sc = find_client (client);
- if (NULL == sc)
+ struct AddressSuggestionMessage *msg;
+ size_t plugin_name_length = strlen (plugin_name) + 1;
+ size_t msize =
+ sizeof (struct AddressSuggestionMessage) +
+ atsi_count * sizeof (struct GNUNET_ATS_Information) + plugin_addr_len +
+ plugin_name_length;
+ char buf[msize] GNUNET_ALIGN;
+ struct GNUNET_ATS_Information *atsp;
+ char *addrp;
+
+ if (my_client == NULL)
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);
+ GNUNET_assert (msize < GNUNET_SERVER_MAX_MESSAGE_SIZE);
+ GNUNET_assert (atsi_count <
+ GNUNET_SERVER_MAX_MESSAGE_SIZE /
+ sizeof (struct GNUNET_ATS_Information));
+ msg = (struct AddressSuggestionMessage *) buf;
+ msg->header.size = htons (msize);
+ msg->header.type = htons (GNUNET_MESSAGE_TYPE_ATS_ADDRESS_SUGGESTION);
+ 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->session_id = htonl (session_id);
+ 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);
+
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "ATS sends quota for peer `%s': (in/out) %u/%u\n",
+ GNUNET_i2s (peer), ntohl (bandwidth_in.value__),
+ ntohl (bandwidth_out.value__));
+
+ GNUNET_SERVER_notification_context_unicast (nc, my_client, &msg->header,
+ GNUNET_YES);
}
+/**
+ * Handle 'request address' 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)
+ const struct GNUNET_MessageHeader *message)
+{
+ const struct RequestAddressMessage *msg =
+ (const struct RequestAddressMessage *) message;
+
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received `%s' message\n",
+ "REQUEST_ADDRESS");
+ GNUNET_break (0 == ntohl (msg->reserved));
+ GAS_addresses_request_address (address_handle, &msg->peer);
+ GNUNET_SERVER_receive_done (client, GNUNET_OK);
+}
+
+/**
+ * Handle 'request address' messages from clients.
+ *
+ * @param cls unused, NULL
+ * @param client client that sent the request
+ * @param message the request message
+ */
+void
+GAS_handle_request_address_cancel (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 RequestAddressMessage *msg =
+ (const struct RequestAddressMessage *) message;
-}
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received `%s' message\n",
+ "REQUEST_ADDRESS_CANCEL");
+ GNUNET_break (0 == ntohl (msg->reserved));
+ GAS_addresses_request_address_cancel (address_handle, &msg->peer);
+
+ GNUNET_SERVER_receive_done (client, GNUNET_OK);
+}
+/**
+ * Handle 'reset backoff' 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_reset_backoff (void *cls,
+ struct GNUNET_SERVER_Client *client,
+ const struct GNUNET_MessageHeader *message)
+{
+ const struct ResetBackoffMessage *msg =
+ (const struct ResetBackoffMessage *) message;
+
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received `%s' message\n",
+ "RESET_BACKOFF");
+ GNUNET_break (0 == ntohl (msg->reserved));
+ GAS_addresses_handle_backoff_reset (address_handle, &msg->peer);
+ GNUNET_SERVER_receive_done (client, GNUNET_OK);
+}
+/**
+ * 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_address_add (void *cls, struct GNUNET_SERVER_Client *client,
+ const struct GNUNET_MessageHeader *message)
{
-#if 0
- struct AddressUpdateMessage * msg = (struct AddressUpdateMessage *) message;
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received `%s' message\n", "ADDRESS_UPDATE");
+ const struct AddressUpdateMessage *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 AddressUpdateMessage))
+ {
+ GNUNET_break (0);
+ GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
+ return;
+ }
+ 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_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 AddressUpdateMessage) != 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, "# address updates received", 1,
+ GNUNET_NO);
+ GAS_addresses_add (address_handle, &m->peer, plugin_name, address, address_length,
+ ntohl (m->session_id), atsi, ats_count);
+ GNUNET_SERVER_receive_done (client, GNUNET_OK);
+}
- struct GNUNET_TRANSPORT_ATS_Information *am;
- char *pm;
- size_t size = ntohs (msg->header.size);
- if ((size <= sizeof (struct AddressUpdateMessage)) || (size >= GNUNET_SERVER_MAX_MESSAGE_SIZE))
+/**
+ * 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)
+{
+ const struct AddressUpdateMessage *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_UPDATE");
+ size = ntohs (message->size);
+ if (size < sizeof (struct AddressUpdateMessage))
{
GNUNET_break (0);
+ GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
return;
}
+ 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_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 AddressUpdateMessage) != 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, "# address updates received", 1,
+ GNUNET_NO);
+ GAS_addresses_update (address_handle, &m->peer, plugin_name, address, address_length,
+ ntohl (m->session_id), atsi, ats_count);
+ GNUNET_SERVER_receive_done (client, GNUNET_OK);
+}
- size_t ats_count = ntohs (msg->ats_count);
- size_t addr_len = ntohs (msg->address_length);
- size_t plugin_len = ntohs (msg->plugin_name_length) + 1 ;
- if (
- (plugin_len >= GNUNET_SERVER_MAX_MESSAGE_SIZE) ||
- (addr_len >= GNUNET_SERVER_MAX_MESSAGE_SIZE) ||
- (addr_len >= GNUNET_SERVER_MAX_MESSAGE_SIZE / sizeof (struct GNUNET_TRANSPORT_ATS_Information)) )
+/**
+ * Handle 'address in use' messages from clients.
+ *
+ * @param cls unused, NULL
+ * @param client client that sent the request
+ * @param message the request message
+ */
+void
+GAS_handle_address_in_use (void *cls, struct GNUNET_SERVER_Client *client,
+ const struct GNUNET_MessageHeader *message)
+{
+ const struct AddressUseMessage *m;
+ const char *address;
+ const char *plugin_name;
+ int res;
+ uint16_t address_length;
+ uint16_t plugin_name_length;
+
+ uint16_t size;
+ uint16_t in_use;
+
+ size = ntohs (message->size);
+ if (size < sizeof (struct AddressUseMessage))
{
GNUNET_break (0);
+ GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
return;
}
+ m = (const struct AddressUseMessage *) message;
- struct ATS_Address * aa = GNUNET_malloc (sizeof (struct ATS_Address) +
- ats_count * sizeof (struct GNUNET_TRANSPORT_ATS_Information) +
- addr_len +
- plugin_len);
+ address_length = ntohs (m->address_length);
+ plugin_name_length = ntohs (m->plugin_name_length);
+ address = (const char *) &m[1];
+ if (plugin_name_length != 0)
+ plugin_name = &address[address_length];
+ else
+ plugin_name = "";
+ if ((address_length + plugin_name_length +
+ sizeof (struct AddressUseMessage) != ntohs (message->size)) ||
+ ((plugin_name_length > 0) &&
+ (plugin_name[plugin_name_length - 1] != '\0')))
+ {
+ GNUNET_break (0);
+ GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
+ return;
+ }
- memcpy (&aa->peer, &msg->peer, sizeof (struct GNUNET_PeerIdentity));
- aa->addr_len = addr_len;
- aa->ats_count = ats_count;
- aa->ats = (struct GNUNET_TRANSPORT_ATS_Information *) &aa[1];
+ in_use = ntohs (m->in_use);
+ res = GAS_addresses_in_use (address_handle,
+ &m->peer,
+ plugin_name,
+ address,
+ address_length,
+ ntohl (m->session_id),
+ in_use);
+
+ if (res == GNUNET_OK)
+ GNUNET_SERVER_receive_done (client, GNUNET_OK);
+ else
+ {
+ GNUNET_break (0);
+ GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
+ }
- am = (struct GNUNET_TRANSPORT_ATS_Information*) &msg[1];
- memcpy (&aa->ats, am, ats_count * sizeof (struct GNUNET_TRANSPORT_ATS_Information));
- pm = (char *) &am[ats_count];
- memcpy (aa->addr, pm, addr_len);
- memcpy (aa->plugin, &pm[plugin_len], plugin_len);
- aa->session_id = ntohl(msg->session_id);
+}
- GNUNET_assert (GNUNET_OK == GNUNET_CONTAINER_multihashmap_put(addresses, &aa->peer.hashPubKey, aa, GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE));
-#endif
+/**
+ * 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;
+ const char *address;
+ const char *plugin_name;
+ uint16_t address_length;
+ uint16_t plugin_name_length;
+ uint16_t size;
+
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received `%s' message of size %u %u\n",
+ "ADDRESS_DESTROYED", ntohs (message->size),
+ sizeof (struct AddressDestroyedMessage));
+ size = ntohs (message->size);
+ if ((size < sizeof (struct AddressDestroyedMessage)) || (client != my_client))
+ {
+ GNUNET_break (0);
+ GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
+ return;
+ }
+ m = (const struct AddressDestroyedMessage *) message;
+ GNUNET_break (0 == ntohl (m->reserved));
+ address_length = ntohs (m->address_length);
+ plugin_name_length = ntohs (m->plugin_name_length);
+ address = (const char *) &m[1];
+ if (plugin_name_length != 0)
+ plugin_name = &address[address_length];
+ else
+ plugin_name = "";
+ if ((address_length + plugin_name_length +
+ sizeof (struct AddressDestroyedMessage) != ntohs (message->size)))
+ {
+ GNUNET_break (0);
+ GNUNET_SERVER_receive_done (client, GNUNET_SYSERR);
+ return;
+ }
+ if ((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 destroyed", 1, GNUNET_NO);
+ GAS_addresses_destroy (address_handle, &m->peer, plugin_name,
+ address, address_length,
+ ntohl (m->session_id));
+ if (0 != 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, struct GAS_Addresses_Handle *ah)
+{
+ GNUNET_assert (NULL != ah);
+ address_handle = ah;
+ nc = GNUNET_SERVER_notification_context_create (server, 128);
+}
+
+/**
+ * Shutdown scheduling subsystem.
+ */
+void
+GAS_scheduling_done ()
{
-#if 0
- // struct AddressDestroyedMessage * msg = (struct AddressDestroyedMessage *) message;
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Received `%s' message\n", "ADDRESS_DESTROYED");
-/*
- struct GNUNET_PeerIdentity *peer = &msg->peer;
- struct ATS_Address * aa = find_address_by_addr (peer);
- GNUNET_CONTAINER_multihashmap_remove(addresses, peer, aa);
- GNUNET_free (aa);*/
-#endif
+ if (NULL != my_client)
+ {
+ my_client = NULL;
+ }
+ GNUNET_SERVER_notification_context_destroy (nc);
+ nc = NULL;
+
}
+
/* end of gnunet-service-ats_scheduling.c */
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