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[GNUnet-SVN] r17436 - gnunet/src/ats
From: |
gnunet |
Subject: |
[GNUnet-SVN] r17436 - gnunet/src/ats |
Date: |
Thu, 13 Oct 2011 15:15:59 +0200 |
Author: grothoff
Date: 2011-10-13 15:15:59 +0200 (Thu, 13 Oct 2011)
New Revision: 17436
Modified:
gnunet/src/ats/ats.h
gnunet/src/ats/ats_api_new.c
gnunet/src/ats/ats_api_performance.c
Log:
sapi implemented
Modified: gnunet/src/ats/ats.h
===================================================================
--- gnunet/src/ats/ats.h 2011-10-13 13:06:01 UTC (rev 17435)
+++ gnunet/src/ats/ats.h 2011-10-13 13:15:59 UTC (rev 17436)
@@ -42,7 +42,7 @@
-struct ClientStart
+struct ClientStartMessage
{
struct GNUNET_MessageHeader header;
Modified: gnunet/src/ats/ats_api_new.c
===================================================================
--- gnunet/src/ats/ats_api_new.c 2011-10-13 13:06:01 UTC (rev 17435)
+++ gnunet/src/ats/ats_api_new.c 2011-10-13 13:15:59 UTC (rev 17436)
@@ -18,48 +18,399 @@
Boston, MA 02111-1307, USA.
*/
/**
- * @file include/gnunet_ats_service.h
+ * @file ats/ats_api_scheduling.c
* @brief automatic transport selection and outbound bandwidth determination
* @author Christian Grothoff
* @author Matthias Wachs
*/
#include "platform.h"
#include "gnunet_ats_service.h"
+#include "ats.h"
/**
+ * Message in linked list we should send to the ATS service. The
+ * actual binary message follows this struct.
+ */
+struct PendingMessage
+{
+
+ /**
+ * Kept in a DLL.
+ */
+ struct PendingMessage *next;
+
+ /**
+ * Kept in a DLL.
+ */
+ struct PendingMessage *prev;
+
+ /**
+ * Size of the message.
+ */
+ size_t size;
+
+ /**
+ * Is this the 'ATS_START' message?
+ */
+ int is_init;
+};
+
+
+/**
* Handle to the ATS subsystem for bandwidth/transport scheduling information.
*/
struct GNUNET_ATS_SchedulingHandle
{
+
+ /**
+ * Our configuration.
+ */
+ const struct GNUNET_CONFIGURATION_Handle *cfg;
+
+ /**
+ * Callback to invoke on suggestions.
+ */
+ GNUNET_ATS_AddressSuggestionCallback suggest_cb;
+
+ /**
+ * Closure for 'suggest_cb'.
+ */
+ void *suggest_cb_cls;
+
+ /**
+ * Connection to ATS service.
+ */
+ struct GNUNET_CLIENT_Connection *client;
+
+ /**
+ * Head of list of messages for the ATS service.
+ */
+ struct PendingMessage *pending_head;
+
+ /**
+ * Tail of list of messages for the ATS service
+ */
+ struct PendingMessage *pending_tail;
+
+ /**
+ * Current request for transmission to ATS.
+ */
+ struct GNUNET_CLIENT_TransmitHandle *th;
+
+ /**
+ * Array of session objects (we need to translate them to numbers and back
+ * for the protocol; the offset in the array is the session number on the
+ * network). Index 0 is always NULL and reserved to represent the NULL
pointer.
+ * Unused entries are also NULL.
+ */
+ struct Session **session_array;
+
+ /**
+ * Size of the session array.
+ */
+ unsigned int session_array_size;
+
};
/**
+ * Re-establish the connection to the ATS service.
+ *
+ * @param sh handle to use to re-connect.
+ */
+static void
+reconnect (struct GNUNET_ATS_SchedulingHandle *sh);
+
+
+/**
+ * Transmit messages from the message queue to the service
+ * (if there are any, and if we are not already trying).
+ *
+ * @param sh handle to use
+ */
+static void
+do_transmit (struct GNUNET_ATS_SchedulingHandle *sh);
+
+
+/**
+ * We can now transmit a message to ATS. Do it.
+ *
+ * @param cls the 'struct GNUNET_ATS_SchedulingHandle'
+ * @param size number of bytes we can transmit to ATS
+ * @param buf where to copy the messages
+ * @return number of bytes copied into buf
+ */
+static size_t
+transmit_message_to_ats (void *cls,
+ size_t size,
+ void *buf)
+{
+ struct GNUNET_ATS_SchedulingHandle *sh = cls;
+ struct PendingMessage *p;
+ size_t ret;
+ char *cbuf;
+
+ sh->th = NULL;
+ ret = 0;
+ cbuf = buf;
+ while ( (NULL != (p = sh->pending_head)) &&
+ (p->size <= size) )
+ {
+ memcpy (&cbuf[ret], &p[1], p->size);
+ ret += p->size;
+ GNUNET_CONTAINER_DLL_remove (sh->pending_head,
+ sh->pending_tail,
+ p);
+ GNUNET_free (p);
+ }
+ do_transmit (sh);
+ return ret;
+}
+
+
+/**
+ * Transmit messages from the message queue to the service
+ * (if there are any, and if we are not already trying).
+ *
+ * @param sh handle to use
+ */
+static void
+do_transmit (struct GNUNET_ATS_SchedulingHandle *sh)
+{
+ struct PendingMessage *p;
+
+ if (NULL != sh->th)
+ return;
+ if (NULL == (p = sh->pending_head))
+ return;
+ sh->th = GNUNET_CLIENT_notify_transmit_ready (sh->client,
+ p->size,
+ GNUNET_TIME_UNIT_FOREVER_REL,
+ GNUNET_YES,
+ &transmit_message_to_ats, sh);
+}
+
+
+/**
+ * Find the session object corresponding to the given session ID.
+ *
+ * @param sh our handle
+ * @param session_id current session ID
+ * @return the session object (or NULL)
+ */
+static struct Session*
+find_session (struct GNUNET_ATS_SchedulingHandle *sh,
+ uint32_t session_id)
+{
+ if (session_id >= sh->session_array_size)
+ {
+ GNUNET_break (0);
+ return NULL;
+ }
+ return sh->session_array[session_id];
+}
+
+
+/**
+ * Get the ID for the given session object. If we do not have an ID for
+ * the given session object, allocate one.
+ *
+ * @param sh our handle
+ * @param session session object
+ * @return the session id
+ */
+static uint32_t
+get_session_id (struct GNUNET_ATS_SchedulingHandle *sh,
+ struct Session *session)
+{
+ unsigned int i;
+ unsigned int f;
+
+ f = 0;
+ for (i=1;i<sh->session_array_size;i++)
+ {
+ if (session == sh->session_array[i])
+ return i;
+ if ( (f == 0) &&
+ (sh->session_array[i] == NULL) )
+ f = i;
+ }
+ if (f == 0)
+ {
+ f = sh->session_array_size;
+ GNUNET_array_grow (sh->session_array,
+ sh->session_array_size,
+ sh->session_array_size * 2);
+ }
+ sh->session_array[f] = session;
+ return f;
+}
+
+
+/**
+ * Remove the session of the given session ID from the session
+ * table (it is no longer valid).
+ *
+ * @param sh our handle
+ * @param session_id identifies session that is no longer valid
+ */
+static void
+remove_session (struct GNUNET_ATS_SchedulingHandle *sh,
+ uint32_t session_id)
+{
+ GNUNET_assert (session_id < sh->session_array_size);
+ sh->session_array[session_id] = NULL;
+}
+
+
+/**
+ * Type of a function to call when we receive a message
+ * from the service.
+ *
+ * @param cls the 'struct GNUNET_ATS_SchedulingHandle'
+ * @param msg message received, NULL on timeout or fatal error
+ */
+static void
+process_ats_message (void *cls,
+ const struct GNUNET_MessageHeader *msg)
+{
+ struct GNUNET_ATS_SchedulingHandle *sh = cls;
+ const struct AddressSuggestionMessage *m;
+ const char *address;
+ const char *plugin_name;
+ uint16_t address_length;
+
+ if (NULL == msg)
+ {
+ GNUNET_CLIENT_disconnect (sh->client, GNUNET_NO);
+ sh->client = NULL;
+ reconnect (sh);
+ return;
+ }
+ if ( (ntohs (msg->type) != GNUNET_MESSAGE_TYPE_ATS_ADDRESS_SUGGESTION) ||
+ (ntohs (msg->size) <= sizeof (struct AddressSuggestionMessage)) )
+ {
+ GNUNET_break (0);
+ GNUNET_CLIENT_disconnect (sh->client, GNUNET_NO);
+ sh->client = NULL;
+ reconnect (sh);
+ return;
+ }
+ m = (const struct AddressSuggestionMessage*) msg;
+ address = (const char*) &m[1];
+ address_length = ntohs (m->address_length);
+ plugin_name = &address[address_length];
+ GNUNET_break (0 == ntohl (m->reserved));
+ if ( (ntohs (m->address_length) +
+ ntohs (m->plugin_name_length) +
+ sizeof (struct AddressSuggestionMessage) != ntohs (msg->size)) ||
+ (plugin_name[ntohs (m->plugin_name_length) - 1] != '\0') )
+ {
+ GNUNET_break (0);
+ GNUNET_CLIENT_disconnect (sh->client, GNUNET_NO);
+ sh->client = NULL;
+ reconnect (sh);
+ return;
+ }
+ sh->suggest_cb (sh->suggest_cb_cls,
+ &m->peer,
+ plugin_name,
+ address, address_length,
+ find_session (sh, ntohl (m->session_id)),
+ m->bandwidth_out,
+ m->bandwidth_in);
+ GNUNET_CLIENT_receive (sh->client,
+ &process_ats_message, sh,
+ GNUNET_TIME_UNIT_FOREVER_REL);
+}
+
+
+/**
+ * Re-establish the connection to the ATS service.
+ *
+ * @param sh handle to use to re-connect.
+ */
+static void
+reconnect (struct GNUNET_ATS_SchedulingHandle *sh)
+{
+ struct PendingMessage *p;
+ struct ClientStartMessage *init;
+
+ GNUNET_assert (NULL == sh->client);
+ sh->client = GNUNET_CLIENT_connect ("ats", sh->cfg);
+ GNUNET_assert (NULL != sh->client);
+ GNUNET_CLIENT_receive (sh->client,
+ &process_ats_message, sh,
+ GNUNET_TIME_UNIT_FOREVER_REL);
+ if ( (NULL == (p = sh->pending_head)) ||
+ (GNUNET_YES != p->is_init) )
+ {
+ p = GNUNET_malloc (sizeof (struct PendingMessage) +
+ sizeof (struct ClientStartMessage));
+ p->size = sizeof (struct ClientStartMessage);
+ p->is_init = GNUNET_YES;
+ init = (struct ClientStartMessage *) &p[1];
+ init->header.type = htons (GNUNET_MESSAGE_TYPE_ATS_START);
+ init->header.size = htons (sizeof (struct ClientStartMessage));
+ init->start_flag = htonl (START_FLAG_SCHEDULING);
+ GNUNET_CONTAINER_DLL_insert (sh->pending_head,
+ sh->pending_tail,
+ p);
+ }
+ do_transmit (sh);
+}
+
+
+/**
* Initialize the ATS subsystem.
*
* @param cfg configuration to use
- * @param alloc_cb notification to call whenever the allocation changed
- * @param alloc_cb_cls closure for 'alloc_cb'
+ * @param suggest_cb notification to call whenever the suggestation changed
+ * @param suggest_cb_cls closure for 'suggest_cb'
* @return ats context
*/
struct GNUNET_ATS_SchedulingHandle *
GNUNET_ATS_scheduling_init (const struct GNUNET_CONFIGURATION_Handle *cfg,
- GNUNET_ATS_AddressSuggestionCallback alloc_cb,
- void *alloc_cb_cls)
+ GNUNET_ATS_AddressSuggestionCallback suggest_cb,
+ void *suggest_cb_cls)
{
- return NULL;
+ struct GNUNET_ATS_SchedulingHandle *sh;
+
+ sh = GNUNET_malloc (sizeof (struct GNUNET_ATS_SchedulingHandle));
+ sh->cfg = cfg;
+ sh->suggest_cb = suggest_cb;
+ sh->suggest_cb_cls = suggest_cb_cls;
+ GNUNET_array_grow (sh->session_array,
+ sh->session_array_size,
+ 4);
+ reconnect (sh);
+ return sh;
}
/**
* Client is done with ATS scheduling, release resources.
*
- * @param atc handle to release
+ * @param sh handle to release
*/
void
-GNUNET_ATS_scheduling_done (struct GNUNET_ATS_SchedulingHandle *atc)
+GNUNET_ATS_scheduling_done (struct GNUNET_ATS_SchedulingHandle *sh)
{
+ struct PendingMessage *p;
+
+ while (NULL != (p = sh->pending_head))
+ {
+ GNUNET_CONTAINER_DLL_remove (sh->pending_head,
+ sh->pending_tail,
+ p);
+ GNUNET_free (p);
+ }
+ GNUNET_CLIENT_disconnect (sh->client, GNUNET_NO);
+ GNUNET_array_grow (sh->session_array,
+ sh->session_array_size,
+ 0);
+ GNUNET_free (sh);
}
@@ -67,13 +418,29 @@
* We would like to establish a new connection with a peer. ATS
* should suggest a good address to begin with.
*
- * @param atc handle
+ * @param sh handle
* @param peer identity of the peer we need an address for
*/
void
-GNUNET_ATS_suggest_address (struct GNUNET_ATS_SchedulingHandle *atc,
+GNUNET_ATS_suggest_address (struct GNUNET_ATS_SchedulingHandle *sh,
const struct GNUNET_PeerIdentity *peer)
{
+ struct PendingMessage *p;
+ struct RequestAddressMessage *m;
+
+ p = GNUNET_malloc (sizeof (struct PendingMessage) +
+ sizeof (struct RequestAddressMessage));
+ p->size = sizeof (struct RequestAddressMessage);
+ p->is_init = GNUNET_NO;
+ m = (struct RequestAddressMessage*) &p[1];
+ m->header.type = htons (GNUNET_MESSAGE_TYPE_ATS_REQUEST_ADDRESS);
+ m->header.size = htons (sizeof (struct RequestAddressMessage));
+ m->reserved = htonl (0);
+ m->peer = *peer;
+ GNUNET_CONTAINER_DLL_insert_tail (sh->pending_head,
+ sh->pending_tail,
+ p);
+ do_transmit (sh);
}
@@ -85,7 +452,7 @@
* which case the call may be ignored or the information may be stored
* for later use). Update bandwidth assignments.
*
- * @param atc handle
+ * @param sh handle
* @param peer identity of the new peer
* @param plugin_name name of the transport plugin
* @param plugin_addr address (if available)
@@ -95,7 +462,7 @@
* @param ats_count number of performance records in 'ats'
*/
void
-GNUNET_ATS_address_update (struct GNUNET_ATS_SchedulingHandle *atc,
+GNUNET_ATS_address_update (struct GNUNET_ATS_SchedulingHandle *sh,
const struct GNUNET_PeerIdentity *peer,
const char *plugin_name,
const void *plugin_addr, size_t plugin_addr_len,
@@ -103,13 +470,51 @@
const struct GNUNET_TRANSPORT_ATS_Information *ats,
uint32_t ats_count)
{
+ struct PendingMessage *p;
+ struct AddressUpdateMessage *m;
+ struct GNUNET_TRANSPORT_ATS_Information *am;
+ char *pm;
+ size_t namelen;
+ size_t msize;
+
+ namelen = (plugin_name == NULL) ? 0 : strlen (plugin_name) + 1;
+ msize = sizeof (struct AddressUpdateMessage) + plugin_addr_len +
+ ats_count * sizeof (struct GNUNET_TRANSPORT_ATS_Information) + namelen;
+ if ( (msize >= GNUNET_SERVER_MAX_MESSAGE_SIZE) ||
+ (plugin_addr_len >= GNUNET_SERVER_MAX_MESSAGE_SIZE) ||
+ (namelen >= GNUNET_SERVER_MAX_MESSAGE_SIZE) ||
+ (ats_count >= GNUNET_SERVER_MAX_MESSAGE_SIZE / sizeof (struct
GNUNET_TRANSPORT_ATS_Information)) )
+ {
+ GNUNET_break (0);
+ return;
+ }
+ p = GNUNET_malloc (sizeof (struct PendingMessage) + msize);
+ p->size = msize;
+ p->is_init = GNUNET_NO;
+ m = (struct AddressUpdateMessage*) &p[1];
+ m->header.type = htons (GNUNET_MESSAGE_TYPE_ATS_ADDRESS_UPDATE);
+ m->header.size = htons (msize);
+ m->ats_count = htonl (ats_count);
+ m->peer = *peer;
+ m->address_length = htons (plugin_addr_len);
+ m->plugin_name_length = htons (namelen);
+ m->session_id = htonl (get_session_id (sh, session));
+ am = (struct GNUNET_TRANSPORT_ATS_Information*) &m[1];
+ memcpy (am, ats, ats_count * sizeof (struct
GNUNET_TRANSPORT_ATS_Information));
+ pm = (char *) &am[ats_count];
+ memcpy (pm, plugin_addr, plugin_addr_len);
+ memcpy (&pm[plugin_addr_len], plugin_name, namelen);
+ GNUNET_CONTAINER_DLL_insert_tail (sh->pending_head,
+ sh->pending_tail,
+ p);
+ do_transmit (sh);
}
/**
* A session got destroyed, stop including it as a valid address.
*
- * @param atc handle
+ * @param sh handle
* @param peer identity of the peer
* @param plugin_name name of the transport plugin
* @param plugin_addr address (if available)
@@ -117,13 +522,49 @@
* @param session session handle that is no longer valid
*/
void
-GNUNET_ATS_address_destroyed (struct GNUNET_ATS_SchedulingHandle *atc,
+GNUNET_ATS_address_destroyed (struct GNUNET_ATS_SchedulingHandle *sh,
const struct GNUNET_PeerIdentity *peer,
const char *plugin_name,
const void *plugin_addr,
size_t plugin_addr_len,
- const struct Session *session)
+ struct Session *session)
{
+ struct PendingMessage *p;
+ struct AddressDestroyedMessage *m;
+ char *pm;
+ size_t namelen;
+ size_t msize;
+ uint32_t session_id;
+
+ namelen = (plugin_name == NULL) ? 0 : strlen (plugin_name) + 1;
+ msize = sizeof (struct AddressUpdateMessage) + plugin_addr_len +
+ namelen;
+ if ( (msize >= GNUNET_SERVER_MAX_MESSAGE_SIZE) ||
+ (plugin_addr_len >= GNUNET_SERVER_MAX_MESSAGE_SIZE) ||
+ (namelen >= GNUNET_SERVER_MAX_MESSAGE_SIZE) )
+ {
+ GNUNET_break (0);
+ return;
+ }
+ p = GNUNET_malloc (sizeof (struct PendingMessage) + msize);
+ p->size = msize;
+ p->is_init = GNUNET_NO;
+ m = (struct AddressDestroyedMessage*) &p[1];
+ m->header.type = htons (GNUNET_MESSAGE_TYPE_ATS_ADDRESS_DESTROYED);
+ m->header.size = htons (msize);
+ m->reserved = htonl (0);
+ m->peer = *peer;
+ m->address_length = htons (plugin_addr_len);
+ m->plugin_name_length = htons (namelen);
+ m->session_id = htonl (session_id = get_session_id (sh, session));
+ pm = (char *) &m[1];
+ memcpy (pm, plugin_addr, plugin_addr_len);
+ memcpy (&pm[plugin_addr_len], plugin_name, namelen);
+ GNUNET_CONTAINER_DLL_insert_tail (sh->pending_head,
+ sh->pending_tail,
+ p);
+ do_transmit (sh);
+ remove_session (sh, session_id);
}
-/* end of ats_api_new.c */
+/* end of ats_api_scheduling.c */
Modified: gnunet/src/ats/ats_api_performance.c
===================================================================
--- gnunet/src/ats/ats_api_performance.c 2011-10-13 13:06:01 UTC (rev
17435)
+++ gnunet/src/ats/ats_api_performance.c 2011-10-13 13:15:59 UTC (rev
17436)
@@ -56,10 +56,10 @@
/**
* Client is done using the ATS performance subsystem, release resources.
*
- * @param atc handle
+ * @param ph handle
*/
void
-GNUNET_ATS_performance_done (struct GNUNET_ATS_SchedulingHandle *atc)
+GNUNET_ATS_performance_done (struct GNUNET_ATS_SchedulingHandle *ph)
{
}
@@ -77,7 +77,7 @@
* the current amount of traffic we receive from the peer and ensure
* that the peer could add 'amount' of data to its stream.
*
- * @param h core handle
+ * @param ph performance handle
* @param peer identifies the peer
* @param amount reserve N bytes for receiving, negative
* amounts can be used to undo a (recent) reservation;
@@ -87,7 +87,7 @@
* @deprecated will be replaced soon
*/
struct GNUNET_ATS_ReservationContext *
-GNUNET_ATS_reserve_bandwidth (struct GNUNET_ATS_PerformanceHandle *h,
+GNUNET_ATS_reserve_bandwidth (struct GNUNET_ATS_PerformanceHandle *ph,
const struct GNUNET_PeerIdentity *peer,
int32_t amount,
GNUNET_ATS_ReservationCallback info,
@@ -113,12 +113,12 @@
* Change preferences for the given peer. Preference changes are forgotten if
peers
* disconnect.
*
- * @param cls closure
+ * @param ph performance handle
* @param peer identifies the peer
* @param ... 0-terminated specification of the desired changes
*/
void
-GNUNET_ATS_change_preference (struct GNUNET_ATS_PerformanceHandle *h,
+GNUNET_ATS_change_preference (struct GNUNET_ATS_PerformanceHandle *ph,
const struct GNUNET_PeerIdentity *peer,
...)
{
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