/*
This file is part of GNUnet.
- (C) 2001, 2002, 2004, 2005, 2007, 2009, 2010, 2012 Christian Grothoff (and other contributing authors)
+ Copyright (C) 2001-2014 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
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.
+ Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ Boston, MA 02110-1301, USA.
*/
/**
* @author Christian Grothoff
*/
#include "platform.h"
-#include "gnunet_client_lib.h"
-#include "gnunet_container_lib.h"
-#include "gnunet_peerinfo_service.h"
+#include "gnunet_util_lib.h"
#include "gnunet_protocols.h"
-#include "gnunet_time_lib.h"
#include "peerinfo.h"
#define LOG(kind,...) GNUNET_log_from (kind, "peerinfo-api",__VA_ARGS__)
-/**
- * Entry in the transmission queue to PEERINFO service. We use
- * the same structure for queueing 'iteration' requests and
- * actual 'add' messages.
- */
-struct GNUNET_PEERINFO_AddContext
-{
- /**
- * This is a linked list.
- */
- struct GNUNET_PEERINFO_AddContext *next;
-
- /**
- * This is a linked list.
- */
- struct GNUNET_PEERINFO_AddContext *prev;
-
- /**
- * Handle to the PEERINFO service.
- */
- struct GNUNET_PEERINFO_Handle *h;
-
- /**
- * Function to call after request has been transmitted, or NULL.
- */
- GNUNET_PEERINFO_Continuation cont;
-
- /**
- * Closure for 'cont'.
- */
- void *cont_cls;
-
- /**
- * Number of bytes of the request message (follows after this struct).
- */
- size_t size;
-
-};
-
-
/**
* Context for an iteration request.
*/
GNUNET_PEERINFO_Processor callback;
/**
- * Closure for 'callback'.
+ * Closure for @e callback.
*/
void *callback_cls;
- /**
- * Our entry in the transmission queue.
- */
- struct GNUNET_PEERINFO_AddContext *ac;
-
- /**
- * Task responsible for timeout.
- */
- GNUNET_SCHEDULER_TaskIdentifier timeout_task;
-
- /**
- * Timeout for the operation.
- */
- struct GNUNET_TIME_Absolute timeout;
-
/**
* Peer we are interested in (only valid if iteration was restricted to one peer).
*/
struct GNUNET_PeerIdentity peer;
/**
- * Is 'peer' set?
+ * Is @e peer set?
*/
int have_peer;
/**
- * Set to GNUNET_YES if we are currently receiving replies from the
- * service.
+ * Only include friends in reply?
*/
- int request_transmitted;
+ int include_friend_only;
};
/**
* Connection to the service.
*/
- struct GNUNET_CLIENT_Connection *client;
-
- /**
- * Head of transmission queue.
- */
- struct GNUNET_PEERINFO_AddContext *ac_head;
-
- /**
- * Tail of transmission queue.
- */
- struct GNUNET_PEERINFO_AddContext *ac_tail;
-
- /**
- * Handle for the current transmission request, or NULL if none is pending.
- */
- struct GNUNET_CLIENT_TransmitHandle *th;
+ struct GNUNET_MQ_Handle *mq;
/**
* Head of iterator DLL.
/**
* ID for a reconnect task.
*/
- GNUNET_SCHEDULER_TaskIdentifier r_task;
-
- /**
- * Are we now receiving?
- */
- int in_receive;
+ struct GNUNET_SCHEDULER_Task *r_task;
};
+/**
+ * Close the existing connection to PEERINFO and reconnect.
+ *
+ * @param h handle to the service
+ */
+static void
+reconnect (struct GNUNET_PEERINFO_Handle *h);
+
+
/**
* Connect to the peerinfo service.
*
{
struct GNUNET_PEERINFO_Handle *h;
- h = GNUNET_malloc (sizeof (struct GNUNET_PEERINFO_Handle));
- h->client = GNUNET_CLIENT_connect ("peerinfo", cfg);
+ h = GNUNET_new (struct GNUNET_PEERINFO_Handle);
h->cfg = cfg;
+ reconnect (h);
+ if (NULL == h->mq)
+ {
+ GNUNET_free (h);
+ return NULL;
+ }
return h;
}
* Disconnect from the peerinfo service. Note that all iterators must
* have completed or have been cancelled by the time this function is
* called (otherwise, calling this function is a serious error).
- * Furthermore, if 'GNUNET_PEERINFO_add_peer' operations are still
+ * Furthermore, if #GNUNET_PEERINFO_add_peer() operations are still
* pending, they will be cancelled silently on disconnect.
*
* @param h handle to disconnect
void
GNUNET_PEERINFO_disconnect (struct GNUNET_PEERINFO_Handle *h)
{
- struct GNUNET_PEERINFO_AddContext *ac;
struct GNUNET_PEERINFO_IteratorContext *ic;
while (NULL != (ic = h->ic_head))
{
- GNUNET_break (GNUNET_YES == ic->request_transmitted);
- ic->request_transmitted = GNUNET_NO;
- GNUNET_PEERINFO_iterate_cancel (ic);
+ GNUNET_CONTAINER_DLL_remove (h->ic_head,
+ h->ic_tail,
+ ic);
+ GNUNET_free (ic);
}
- while (NULL != (ac = h->ac_head))
+ if (NULL != h->mq)
{
- GNUNET_CONTAINER_DLL_remove (h->ac_head, h->ac_tail, ac);
- if (NULL != ac->cont)
- ac->cont (ac->cont_cls, _("aborted due to explicit disconnect request"));
- GNUNET_free (ac);
+ GNUNET_MQ_destroy (h->mq);
+ h->mq = NULL;
}
- if (NULL != h->th)
- {
- GNUNET_CLIENT_notify_transmit_ready_cancel (h->th);
- h->th = NULL;
- }
- if (NULL != h->client)
- {
- GNUNET_CLIENT_disconnect (h->client);
- h->client = NULL;
- }
- if (GNUNET_SCHEDULER_NO_TASK != h->r_task)
+ if (NULL != h->r_task)
{
GNUNET_SCHEDULER_cancel (h->r_task);
- h->r_task = GNUNET_SCHEDULER_NO_TASK;
+ h->r_task = NULL;
}
GNUNET_free (h);
}
-/**
- * Check if we have a request pending in the transmission queue and are
- * able to transmit it right now. If so, schedule transmission.
- *
- * @param h handle to the service
- */
-static void
-trigger_transmit (struct GNUNET_PEERINFO_Handle *h);
-
-
-/**
- * Close the existing connection to PEERINFO and reconnect.
- *
- * @param h handle to the service
- */
-static void
-reconnect (struct GNUNET_PEERINFO_Handle *h);
-
-
/**
* Task scheduled to re-try connecting to the peerinfo service.
*
- * @param cls the 'struct GNUNET_PEERINFO_Handle'
- * @param tc scheduler context
+ * @param cls the `struct GNUNET_PEERINFO_Handle *`
*/
static void
-reconnect_task (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
+reconnect_task (void *cls)
{
struct GNUNET_PEERINFO_Handle *h = cls;
- h->r_task = GNUNET_SCHEDULER_NO_TASK;
+ h->r_task = NULL;
reconnect (h);
}
/**
- * Close the existing connection to PEERINFO and reconnect.
+ * We encountered an error, reconnect to the PEERINFO service.
*
- * @param h handle to the service
+ * @param h handle to reconnect
*/
static void
-reconnect (struct GNUNET_PEERINFO_Handle *h)
-{
- if (GNUNET_SCHEDULER_NO_TASK != h->r_task)
- {
- GNUNET_SCHEDULER_cancel (h->r_task);
- h->r_task = GNUNET_SCHEDULER_NO_TASK;
- }
- if (NULL != h->th)
- {
- GNUNET_CLIENT_notify_transmit_ready_cancel (h->th);
- h->th = NULL;
- }
- if (NULL != h->client)
- {
- GNUNET_CLIENT_disconnect (h->client);
- h->client = NULL;
- }
- h->in_receive = GNUNET_NO;
- h->client = GNUNET_CLIENT_connect ("peerinfo", h->cfg);
- if (NULL == h->client)
- {
- h->r_task =
- GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_SECONDS, &reconnect_task,
- h);
- return;
- }
- trigger_transmit (h);
-}
-
-
-/**
- * Transmit the request at the head of the transmission queue
- * and trigger continuation (if any).
- *
- * @param cls the 'struct GNUNET_PEERINFO_Handle' (with the queue)
- * @param size size of the buffer (0 on error)
- * @param buf where to copy the message
- * @return number of bytes copied to buf
- */
-static size_t
-do_transmit (void *cls, size_t size, void *buf)
+do_reconnect (struct GNUNET_PEERINFO_Handle *h)
{
- struct GNUNET_PEERINFO_Handle *h = cls;
- struct GNUNET_PEERINFO_AddContext *ac = h->ac_head;
- size_t ret;
+ struct GNUNET_PEERINFO_IteratorContext *ic = h->ic_head;
- h->th = NULL;
- if (NULL == ac)
- return 0; /* request was cancelled in the meantime */
- if (NULL == buf)
+ GNUNET_MQ_destroy (h->mq);
+ h->mq = NULL;
+ if (NULL != ic)
{
- /* peerinfo service died */
- LOG (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK,
- "Failed to transmit message to `%s' service.\n", "PEERINFO");
- GNUNET_CONTAINER_DLL_remove (h->ac_head, h->ac_tail, ac);
- reconnect (h);
- if (NULL != ac->cont)
- ac->cont (ac->cont_cls, _("failed to transmit request (service down?)"));
- GNUNET_free (ac);
- return 0;
+ GNUNET_CONTAINER_DLL_remove (h->ic_head,
+ h->ic_tail,
+ ic);
+ if (NULL != ic->callback)
+ ic->callback (ic->callback_cls,
+ NULL,
+ NULL,
+ _("Failed to receive response from `PEERINFO' service."));
+ GNUNET_free (ic);
}
- ret = ac->size;
- if (size < ret)
- {
- /* change in head of queue (i.e. cancel + add), try again */
- trigger_transmit (h);
- return 0;
- }
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "Transmitting request of size %u to `%s' service.\n", ret, "PEERINFO");
- memcpy (buf, &ac[1], ret);
- GNUNET_CONTAINER_DLL_remove (h->ac_head, h->ac_tail, ac);
- trigger_transmit (h);
- if (NULL != ac->cont)
- ac->cont (ac->cont_cls, NULL);
- GNUNET_free (ac);
- return ret;
+ h->r_task = GNUNET_SCHEDULER_add_now (&reconnect_task,
+ h);
}
/**
- * Check if we have a request pending in the transmission queue and are
- * able to transmit it right now. If so, schedule transmission.
+ * We got a disconnect after asking regex to do the announcement.
+ * Retry.
*
- * @param h handle to the service
+ * @param cls the `struct GNUNET_PEERINFO_Handle` to retry
+ * @param error error code
*/
static void
-trigger_transmit (struct GNUNET_PEERINFO_Handle *h)
-{
- struct GNUNET_PEERINFO_AddContext *ac;
-
- if (NULL == (ac = h->ac_head))
- return; /* no requests queued */
- if (NULL != h->th)
- return; /* request already pending */
- if (NULL == h->client)
- {
- /* disconnected, try to reconnect */
- reconnect (h);
- return;
- }
- h->th =
- GNUNET_CLIENT_notify_transmit_ready (h->client, ac->size,
- GNUNET_TIME_UNIT_FOREVER_REL,
- GNUNET_YES,
- &do_transmit, h);
-}
-
-
-/**
- * Add a host to the persistent list. This method operates in
- * semi-reliable mode: if the transmission is not completed by
- * the time 'GNUNET_PEERINFO_disconnect' is called, it will be
- * aborted. Furthermore, if a second HELLO is added for the
- * same peer before the first one was transmitted, PEERINFO may
- * merge the two HELLOs prior to transmission to the service.
- *
- * @param h handle to the peerinfo service
- * @param hello the verified (!) HELLO message
- * @param cont continuation to call when done, NULL is allowed
- * @param cont_cls closure for 'cont'
- * @return handle to cancel add operation; all pending
- * 'add' operations will be cancelled automatically
- * on disconnect, so it is not necessary to keep this
- * handle (unless 'cont' is NULL and at some point
- * calling 'cont' must be prevented)
- */
-struct GNUNET_PEERINFO_AddContext *
-GNUNET_PEERINFO_add_peer (struct GNUNET_PEERINFO_Handle *h,
- const struct GNUNET_HELLO_Message *hello,
- GNUNET_PEERINFO_Continuation cont,
- void *cont_cls)
+mq_error_handler (void *cls,
+ enum GNUNET_MQ_Error error)
{
- uint16_t hs = GNUNET_HELLO_size (hello);
- struct GNUNET_PEERINFO_AddContext *ac;
- struct GNUNET_PeerIdentity peer;
+ struct GNUNET_PEERINFO_Handle *h = cls;
- GNUNET_assert (GNUNET_OK == GNUNET_HELLO_get_id (hello, &peer));
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "Adding peer `%s' to PEERINFO database (%u bytes of `%s')\n",
- GNUNET_i2s (&peer), hs, "HELLO");
- ac = GNUNET_malloc (sizeof (struct GNUNET_PEERINFO_AddContext) + hs);
- ac->h = h;
- ac->size = hs;
- ac->cont = cont;
- ac->cont_cls = cont_cls;
- memcpy (&ac[1], hello, hs);
- GNUNET_CONTAINER_DLL_insert_tail (h->ac_head, h->ac_tail, ac);
- trigger_transmit (h);
- return ac;
+ do_reconnect (h);
}
-/**
- * Cancel pending 'add' operation. Must only be called before
- * either 'cont' or 'GNUNET_PEERINFO_disconnect' are invoked.
- *
- * @param ac handle for the add operation to cancel
- */
-void
-GNUNET_PEERINFO_add_peer_cancel (struct GNUNET_PEERINFO_AddContext *ac)
-{
- struct GNUNET_PEERINFO_Handle *h = ac->h;
-
- GNUNET_CONTAINER_DLL_remove (h->ac_head, h->ac_tail, ac);
- GNUNET_free (ac);
-}
-
/**
- * Type of a function to call when we receive a message from the
- * service. Call the iterator with the result and (if applicable)
- * continue to receive more messages or trigger processing the next
- * event (if applicable).
+ * Function called when we receive an info message. Check it is
+ * well-formed.
*
* @param cls closure
- * @param msg message received, NULL on timeout or fatal error
+ * @param im message received
+ * @return #GNUNET_OK if the message is OK
*/
-static void
-peerinfo_handler (void *cls, const struct GNUNET_MessageHeader *msg)
+static int
+check_info (void *cls,
+ const struct InfoMessage *im)
{
struct GNUNET_PEERINFO_Handle *h = cls;
struct GNUNET_PEERINFO_IteratorContext *ic = h->ic_head;
- const struct InfoMessage *im;
- const struct GNUNET_HELLO_Message *hello;
- GNUNET_PEERINFO_Processor cb;
- struct GNUNET_PeerIdentity id;
- void *cb_cls;
- uint16_t ms;
+ uint16_t ms = ntohs (im->header.size) - sizeof (*im);
- h->in_receive = GNUNET_NO;
- if (NULL == msg)
+ if (0 != ntohl (im->reserved))
{
- /* peerinfo service died, signal error */
- if (NULL != ic)
- {
- cb = ic->callback;
- cb_cls = ic->callback_cls;
- GNUNET_PEERINFO_iterate_cancel (ic);
- }
- else
- {
- cb = NULL;
- }
- reconnect (h);
- if (NULL != cb)
- cb (cb_cls, NULL, NULL,
- _("Failed to receive response from `PEERINFO' service."));
- return;
+ GNUNET_break (0);
+ return GNUNET_SYSERR;
}
if (NULL == ic)
{
- /* didn't expect a response, reconnect */
- reconnect (h);
- return;
- }
- ic->request_transmitted = GNUNET_NO;
- cb = ic->callback;
- cb_cls = ic->callback_cls;
- if (GNUNET_MESSAGE_TYPE_PEERINFO_INFO_END == ntohs (msg->type))
- {
- /* normal end of list of peers, signal end, process next pending request */
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "Received end of list of peers from `%s' service\n", "PEERINFO");
- GNUNET_PEERINFO_iterate_cancel (ic);
- trigger_transmit (h);
- if (GNUNET_NO == h->in_receive)
- {
- h->in_receive = GNUNET_YES;
- if (h->ic_head != NULL)
- GNUNET_CLIENT_receive (h->client, &peerinfo_handler, h,
- GNUNET_TIME_absolute_get_remaining (h->ic_head->timeout));
- else
- GNUNET_break (0);
- }
- if (NULL != cb)
- cb (cb_cls, NULL, NULL, NULL);
- return;
- }
-
- ms = ntohs (msg->size);
- if ((ms < sizeof (struct InfoMessage)) ||
- (ntohs (msg->type) != GNUNET_MESSAGE_TYPE_PEERINFO_INFO))
- {
- /* malformed message */
+ /* didn't expect a response, bad */
GNUNET_break (0);
- GNUNET_PEERINFO_iterate_cancel (ic);
- reconnect (h);
- if (NULL != cb)
- cb (cb_cls, NULL, NULL,
- _("Received invalid message from `PEERINFO' service."));
- return;
+ return GNUNET_SYSERR;
}
- im = (const struct InfoMessage *) msg;
- GNUNET_break (0 == ntohl (im->reserved));
if ( (GNUNET_YES == ic->have_peer) &&
- (0 != memcmp (&ic->peer, &im->peer, sizeof (struct GNUNET_PeerIdentity))) )
+ (0 != memcmp (&ic->peer,
+ &im->peer,
+ sizeof (struct GNUNET_PeerIdentity))) )
{
/* bogus message (from a different iteration call?); out of sequence! */
LOG (GNUNET_ERROR_TYPE_ERROR,
"Received HELLO for peer `%s', expected peer `%s'\n",
- GNUNET_h2s (&im->peer.hashPubKey),
+ GNUNET_i2s (&im->peer),
GNUNET_i2s (&ic->peer));
-
GNUNET_break (0);
- GNUNET_PEERINFO_iterate_cancel (ic);
- reconnect (h);
- if (NULL != cb)
- cb (cb_cls, NULL, NULL,
- _("Received invalid message from `PEERINFO' service."));
- return;
+ return GNUNET_SYSERR;
}
- hello = NULL;
- if (ms > sizeof (struct InfoMessage) + sizeof (struct GNUNET_MessageHeader))
+ if (ms > sizeof (struct GNUNET_MessageHeader))
{
+ const struct GNUNET_HELLO_Message *hello;
+ struct GNUNET_PeerIdentity id;
+
hello = (const struct GNUNET_HELLO_Message *) &im[1];
- if (ms != sizeof (struct InfoMessage) + GNUNET_HELLO_size (hello))
+ if (ms != GNUNET_HELLO_size (hello))
{
/* malformed message */
GNUNET_break (0);
- GNUNET_PEERINFO_iterate_cancel (ic);
- reconnect (h);
- if (NULL != cb)
- cb (cb_cls, NULL, NULL,
- _("Received invalid message from `PEERINFO' service."));
- return;
+ return GNUNET_SYSERR;
}
- if (GNUNET_OK != GNUNET_HELLO_get_id (hello, &id))
+ if (GNUNET_OK !=
+ GNUNET_HELLO_get_id (hello,
+ &id))
{
/* malformed message */
GNUNET_break (0);
- GNUNET_PEERINFO_iterate_cancel (ic);
- reconnect (h);
- if (NULL != cb)
- cb (cb_cls, NULL, NULL,
- _("Received invalid message from `PEERINFO' service."));
- return;
+ return GNUNET_SYSERR;
}
- if (0 != memcmp (&im->peer, &id, sizeof (struct GNUNET_PeerIdentity)))
+ if (0 != memcmp (&im->peer,
+ &id,
+ sizeof (struct GNUNET_PeerIdentity)))
{
/* malformed message */
GNUNET_break (0);
- GNUNET_PEERINFO_iterate_cancel (ic);
- reconnect (h);
- if (NULL != cb)
- cb (cb_cls, NULL, NULL,
- _("Received invalid message from `PEERINFO' service."));
- return;
+ return GNUNET_SYSERR;
}
}
+ else if (0 != ms)
+ {
+ /* malformed message */
+ GNUNET_break (0);
+ return GNUNET_SYSERR;
+ }
+ return GNUNET_OK;
+}
- /* normal data message */
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "Received %u bytes of `%s' information about peer `%s' from `%s' service\n",
- (hello == NULL) ? 0 : (unsigned int) GNUNET_HELLO_size (hello), "HELLO",
- GNUNET_i2s (&im->peer), "PEERINFO");
- h->in_receive = GNUNET_YES;
- GNUNET_CLIENT_receive (h->client, &peerinfo_handler, h,
- GNUNET_TIME_absolute_get_remaining (ic->timeout));
- if (NULL != cb)
- cb (cb_cls, &im->peer, hello, NULL);
+
+/**
+ * Handle info message.
+ *
+ * @param cls closure
+ * @param im message received
+ */
+static void
+handle_info (void *cls,
+ const struct InfoMessage *im)
+{
+ struct GNUNET_PEERINFO_Handle *h = cls;
+ struct GNUNET_PEERINFO_IteratorContext *ic = h->ic_head;
+ const struct GNUNET_HELLO_Message *hello;
+ uint16_t ms;
+
+ ms = ntohs (im->header.size);
+ hello = (0 == ms) ? NULL : (const struct GNUNET_HELLO_Message *) &im[1];
+ if (NULL != ic->callback)
+ ic->callback (ic->callback_cls,
+ &im->peer,
+ hello,
+ NULL);
}
/**
- * We've transmitted the iteration request. Now get ready to process
- * the results (or handle transmission error).
+ * Send the next IC request at the head of the queue.
*
- * @param cls the 'struct GNUNET_PEERINFO_IteratorContext'
- * @param emsg error message, NULL if transmission worked
+ * @param h handle
*/
static void
-iterator_start_receive (void *cls, const char *emsg)
+send_ic_request (struct GNUNET_PEERINFO_Handle *h)
{
- struct GNUNET_PEERINFO_IteratorContext *ic = cls;
- struct GNUNET_PEERINFO_Handle *h = ic->h;
- GNUNET_PEERINFO_Processor cb;
- void *cb_cls;
+ struct GNUNET_PEERINFO_IteratorContext *ic = h->ic_head;
+ struct GNUNET_MQ_Envelope *env;
+ struct ListAllPeersMessage *lapm;
+ struct ListPeerMessage *lpm;
- ic->ac = NULL;
- if (NULL != emsg)
+ if (NULL == ic)
{
- cb = ic->callback;
- cb_cls = ic->callback_cls;
- GNUNET_PEERINFO_iterate_cancel (ic);
- reconnect (h);
- if (NULL != cb)
- cb (cb_cls, NULL, NULL, emsg);
+ GNUNET_break (0);
+ return;
+ }
+ if (NULL == h->mq)
+ {
+ GNUNET_break (0);
return;
}
- LOG (GNUNET_ERROR_TYPE_DEBUG, "Waiting for response from `%s' service.\n",
- "PEERINFO");
- ic->request_transmitted = GNUNET_YES;
- if (GNUNET_NO == h->in_receive)
+ if (GNUNET_NO == ic->have_peer)
{
- h->in_receive = GNUNET_YES;
- GNUNET_CLIENT_receive (h->client, &peerinfo_handler, h,
- GNUNET_TIME_absolute_get_remaining (ic->timeout));
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Requesting list of peers from PEERINFO service\n");
+ env = GNUNET_MQ_msg (lapm,
+ GNUNET_MESSAGE_TYPE_PEERINFO_GET_ALL);
+ lapm->include_friend_only = htonl (ic->include_friend_only);
+ }
+ else
+ {
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Requesting information on peer `%s' from PEERINFO service\n",
+ GNUNET_i2s (&ic->peer));
+ env = GNUNET_MQ_msg (lpm,
+ GNUNET_MESSAGE_TYPE_PEERINFO_GET);
+ lpm->include_friend_only = htonl (ic->include_friend_only);
+ lpm->peer = ic->peer;
}
+ GNUNET_MQ_send (h->mq,
+ env);
}
/**
- * Peerinfo iteration request has timed out.
+ * Type of a function to call when we receive a message from the
+ * service. Call the iterator with the result and (if applicable)
+ * continue to receive more messages or trigger processing the next
+ * event (if applicable).
*
- * @param cls the 'struct GNUNET_PEERINFO_IteratorContext*'
- * @param tc scheduler context
+ * @param cls closure
+ * @param msg message received, NULL on timeout or fatal error
*/
static void
-signal_timeout (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
+handle_end_iteration (void *cls,
+ const struct GNUNET_MessageHeader *msg)
{
- struct GNUNET_PEERINFO_IteratorContext *ic = cls;
- GNUNET_PEERINFO_Processor cb;
- void *cb_cls;
-
- ic->timeout_task = GNUNET_SCHEDULER_NO_TASK;
- cb = ic->callback;
- cb_cls = ic->callback_cls;
- GNUNET_PEERINFO_iterate_cancel (ic);
- if (NULL != cb)
- cb (cb_cls, NULL, NULL,
- _("Timeout transmitting iteration request to `PEERINFO' service."));
+ struct GNUNET_PEERINFO_Handle *h = cls;
+ struct GNUNET_PEERINFO_IteratorContext *ic = h->ic_head;
+
+ if (NULL == ic)
+ {
+ /* didn't expect a response, reconnect */
+ GNUNET_break (0);
+ reconnect (h);
+ return;
+ }
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Received end of list of peers from PEERINFO service\n");
+ GNUNET_CONTAINER_DLL_remove (h->ic_head,
+ h->ic_tail,
+ ic);
+ if (NULL != h->ic_head)
+ send_ic_request (h);
+ if (NULL != ic->callback)
+ ic->callback (ic->callback_cls,
+ NULL,
+ NULL,
+ NULL);
+ GNUNET_free (ic);
+}
+
+
+/**
+ * Close the existing connection to PEERINFO and reconnect.
+ *
+ * @param h handle to the service
+ */
+static void
+reconnect (struct GNUNET_PEERINFO_Handle *h)
+{
+ struct GNUNET_MQ_MessageHandler handlers[] = {
+ GNUNET_MQ_hd_var_size (info,
+ GNUNET_MESSAGE_TYPE_PEERINFO_INFO,
+ struct InfoMessage,
+ h),
+ GNUNET_MQ_hd_fixed_size (end_iteration,
+ GNUNET_MESSAGE_TYPE_PEERINFO_INFO_END,
+ struct GNUNET_MessageHeader,
+ h),
+ GNUNET_MQ_handler_end ()
+ };
+
+ if (NULL != h->r_task)
+ {
+ GNUNET_SCHEDULER_cancel (h->r_task);
+ h->r_task = NULL;
+ }
+ if (NULL != h->mq)
+ {
+ GNUNET_MQ_destroy (h->mq);
+ h->mq = NULL;
+ }
+ h->mq = GNUNET_CLIENT_connect (h->cfg,
+ "peerinfo",
+ handlers,
+ &mq_error_handler,
+ h);
+ if (NULL != h->ic_head)
+ send_ic_request (h);
}
* with a NULL pointer. After that final invocation, the iterator
* context must no longer be used.
*
- * Instead of calling this function with 'peer == NULL' it is often
- * better to use 'GNUNET_PEERINFO_notify'.
+ * Instead of calling this function with `peer == NULL` it is often
+ * better to use #GNUNET_PEERINFO_notify().
*
* @param h handle to the peerinfo service
+ * @param include_friend_only include HELLO messages for friends only
* @param peer restrict iteration to this peer only (can be NULL)
- * @param timeout how long to wait until timing out
* @param callback the method to call for each peer
- * @param callback_cls closure for callback
+ * @param callback_cls closure for @a callback
* @return iterator context
*/
struct GNUNET_PEERINFO_IteratorContext *
GNUNET_PEERINFO_iterate (struct GNUNET_PEERINFO_Handle *h,
+ int include_friend_only,
const struct GNUNET_PeerIdentity *peer,
- struct GNUNET_TIME_Relative timeout,
- GNUNET_PEERINFO_Processor callback, void *callback_cls)
+ GNUNET_PEERINFO_Processor callback,
+ void *callback_cls)
{
- struct GNUNET_MessageHeader *lapm;
- struct ListPeerMessage *lpm;
struct GNUNET_PEERINFO_IteratorContext *ic;
- struct GNUNET_PEERINFO_AddContext *ac;
- ic = GNUNET_malloc (sizeof (struct GNUNET_PEERINFO_IteratorContext));
- if (NULL == peer)
- {
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "Requesting list of peers from PEERINFO service\n");
- ac =
- GNUNET_malloc (sizeof (struct GNUNET_PEERINFO_AddContext) +
- sizeof (struct GNUNET_MessageHeader));
- ac->size = sizeof (struct GNUNET_MessageHeader);
- lapm = (struct GNUNET_MessageHeader *) &ac[1];
- lapm->size = htons (sizeof (struct GNUNET_MessageHeader));
- lapm->type = htons (GNUNET_MESSAGE_TYPE_PEERINFO_GET_ALL);
- }
- else
+ ic = GNUNET_new (struct GNUNET_PEERINFO_IteratorContext);
+ ic->h = h;
+ ic->include_friend_only = include_friend_only;
+ ic->callback = callback;
+ ic->callback_cls = callback_cls;
+ if (NULL != peer)
{
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "Requesting information on peer `%4s' from PEERINFO service\n",
- GNUNET_i2s (peer));
- ac =
- GNUNET_malloc (sizeof (struct GNUNET_PEERINFO_AddContext) +
- sizeof (struct ListPeerMessage));
- ac->size = sizeof (struct ListPeerMessage);
- lpm = (struct ListPeerMessage *) &ac[1];
- lpm->header.size = htons (sizeof (struct ListPeerMessage));
- lpm->header.type = htons (GNUNET_MESSAGE_TYPE_PEERINFO_GET);
- memcpy (&lpm->peer, peer, sizeof (struct GNUNET_PeerIdentity));
ic->have_peer = GNUNET_YES;
ic->peer = *peer;
}
- ic->h = h;
- ic->ac = ac;
- ic->callback = callback;
- ic->callback_cls = callback_cls;
- ic->timeout = GNUNET_TIME_relative_to_absolute (timeout);
- ic->timeout_task =
- GNUNET_SCHEDULER_add_delayed (timeout, &signal_timeout, ic);
- ac->cont = &iterator_start_receive;
- ac->cont_cls = ic;
- GNUNET_CONTAINER_DLL_insert_tail (h->ac_head, h->ac_tail, ac);
GNUNET_CONTAINER_DLL_insert_tail (h->ic_head,
h->ic_tail,
ic);
- trigger_transmit (h);
+ if (h->ic_head == ic)
+ send_ic_request (h);
return ic;
}
void
GNUNET_PEERINFO_iterate_cancel (struct GNUNET_PEERINFO_IteratorContext *ic)
{
- struct GNUNET_PEERINFO_Handle *h;
+ struct GNUNET_PEERINFO_Handle *h = ic->h;
- h = ic->h;
- if (GNUNET_SCHEDULER_NO_TASK != ic->timeout_task)
- {
- GNUNET_SCHEDULER_cancel (ic->timeout_task);
- ic->timeout_task = GNUNET_SCHEDULER_NO_TASK;
- }
ic->callback = NULL;
- if (GNUNET_YES == ic->request_transmitted)
- return; /* need to finish processing */
+ if (ic == h->ic_head)
+ return;
GNUNET_CONTAINER_DLL_remove (h->ic_head,
h->ic_tail,
ic);
- if (NULL != ic->ac)
- {
- GNUNET_CONTAINER_DLL_remove (h->ac_head, h->ac_tail, ic->ac);
- GNUNET_free (ic->ac);
- }
GNUNET_free (ic);
}
+/**
+ * Add a host to the persistent list. This method operates in
+ * semi-reliable mode: if the transmission is not completed by
+ * the time #GNUNET_PEERINFO_disconnect() is called, it will be
+ * aborted. Furthermore, if a second HELLO is added for the
+ * same peer before the first one was transmitted, PEERINFO may
+ * merge the two HELLOs prior to transmission to the service.
+ *
+ * @param h handle to the peerinfo service
+ * @param hello the verified (!) HELLO message
+ * @param cont continuation to call when done, NULL is allowed
+ * @param cont_cls closure for @a cont
+ * @return handle to cancel add operation; all pending
+ * 'add' operations will be cancelled automatically
+ * on disconnect, so it is not necessary to keep this
+ * handle (unless @a cont is NULL and at some point
+ * calling @a cont must be prevented)
+ */
+struct GNUNET_MQ_Envelope *
+GNUNET_PEERINFO_add_peer (struct GNUNET_PEERINFO_Handle *h,
+ const struct GNUNET_HELLO_Message *hello,
+ GNUNET_SCHEDULER_TaskCallback cont,
+ void *cont_cls)
+{
+ struct GNUNET_MQ_Envelope *env;
+ struct GNUNET_PeerIdentity peer;
+
+ if (NULL == h->mq)
+ return NULL;
+ GNUNET_assert (GNUNET_OK ==
+ GNUNET_HELLO_get_id (hello,
+ &peer));
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Adding peer `%s' to PEERINFO database\n",
+ GNUNET_i2s (&peer));
+ env = GNUNET_MQ_msg_copy ((const struct GNUNET_MessageHeader *) hello);
+ if (NULL != cont)
+ GNUNET_MQ_notify_sent (env,
+ cont,
+ cont_cls);
+ GNUNET_MQ_send (h->mq,
+ env);
+ return env;
+}
+
+
/* end of peerinfo_api.c */
projects / oweals / gnunet.git / blobdiff