*/
/**
- * @file transport/transport_api_peer_address_lookup.c
+ * @file transport/transport_api_address_lookup.c
* @brief given a peer id, get all known addresses from transport service
*
* This api provides the ability to query the transport service about
*/
struct GNUNET_CLIENT_Connection *client;
+ /**
+ * Configuration we use.
+ */
+ const struct GNUNET_CONFIGURATION_Handle *cfg;
+
/**
* When should this operation time out?
*/
struct GNUNET_TIME_Absolute timeout;
+
+ /**
+ * Backoff for reconnect.
+ */
+ struct GNUNET_TIME_Relative backoff;
+
+ /**
+ * Task ID for reconnect.
+ */
+ GNUNET_SCHEDULER_TaskIdentifier reconnect_task;
+
+ /**
+ * Identity of the peer to monitor.
+ */
+ struct GNUNET_PeerIdentity peer;
+
+ /**
+ * Was this a one-shot request?
+ */
+ int one_shot;
};
+/**
+ * Function called with responses from the service.
+ *
+ * @param cls our 'struct GNUNET_TRANSPORT_PeerAddressLookupContext*'
+ * @param msg NULL on timeout or error, otherwise presumably a
+ * message with the human-readable address
+ */
+static void
+peer_address_response_processor (void *cls,
+ const struct GNUNET_MessageHeader *msg);
+
+
+/**
+ * Send our subscription request to the service.
+ *
+ * @param pal_ctx our context
+ */
+static void
+send_request (struct GNUNET_TRANSPORT_PeerIterateContext *pal_ctx)
+{
+ struct AddressIterateMessage msg;
+
+ msg.header.size = htons (sizeof (struct AddressIterateMessage));
+ msg.header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_ITERATE);
+ msg.one_shot = htonl (pal_ctx->one_shot);
+ msg.timeout = GNUNET_TIME_absolute_hton (pal_ctx->timeout);
+ msg.peer = pal_ctx->peer;
+ GNUNET_assert (GNUNET_OK ==
+ GNUNET_CLIENT_transmit_and_get_response (pal_ctx->client,
+ &msg.header,
+ GNUNET_TIME_absolute_get_remaining (pal_ctx->timeout),
+ GNUNET_YES,
+ &peer_address_response_processor,
+ pal_ctx));
+}
+
+/**
+ * Task run to re-establish the connection.
+ *
+ * @param cls our 'struct GNUNET_TRANSPORT_PeerAddressLookupContext*'
+ * @param tc scheduler context, unused
+ */
+static void
+do_connect (void *cls,
+ const struct GNUNET_SCHEDULER_TaskContext *tc)
+{
+ struct GNUNET_TRANSPORT_PeerIterateContext *pal_ctx = cls;
+
+ pal_ctx->reconnect_task = GNUNET_SCHEDULER_NO_TASK;
+ pal_ctx->client = GNUNET_CLIENT_connect ("transport", pal_ctx->cfg);
+ GNUNET_assert (NULL != pal_ctx->client);
+ send_request (pal_ctx);
+}
+
+
+/**
+ * Cut the existing connection and reconnect.
+ *
+ * @param pal_ctx our context
+ */
+static void
+reconnect (struct GNUNET_TRANSPORT_PeerIterateContext *pal_ctx)
+{
+ GNUNET_assert (GNUNET_NO == pal_ctx->one_shot);
+ GNUNET_CLIENT_disconnect (pal_ctx->client);
+ pal_ctx->client = NULL;
+ pal_ctx->backoff = GNUNET_TIME_relative_max (GNUNET_TIME_UNIT_MILLISECONDS,
+ GNUNET_TIME_relative_min (GNUNET_TIME_relative_multiply (pal_ctx->backoff, 2),
+ GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 30)));
+ pal_ctx->reconnect_task = GNUNET_SCHEDULER_add_delayed (pal_ctx->backoff,
+ &do_connect,
+ pal_ctx);
+}
+
+
/**
* Function called with responses from the service.
*
if (msg == NULL)
{
- pal_ctx->cb (pal_ctx->cb_cls, NULL, NULL);
- GNUNET_TRANSPORT_peer_get_active_addresses_cancel (pal_ctx);
+ if (pal_ctx->one_shot)
+ {
+ pal_ctx->cb (pal_ctx->cb_cls, NULL, NULL);
+ GNUNET_TRANSPORT_peer_get_active_addresses_cancel (pal_ctx);
+ }
+ else
+ {
+ reconnect (pal_ctx);
+ }
return;
}
size = ntohs (msg->size);
if (size == sizeof (struct GNUNET_MessageHeader))
{
/* done! */
- pal_ctx->cb (pal_ctx->cb_cls, NULL, NULL);
- GNUNET_TRANSPORT_peer_get_active_addresses_cancel (pal_ctx);
+ if (pal_ctx->one_shot)
+ {
+ pal_ctx->cb (pal_ctx->cb_cls, NULL, NULL);
+ GNUNET_TRANSPORT_peer_get_active_addresses_cancel (pal_ctx);
+ }
+ else
+ {
+ reconnect (pal_ctx);
+ }
return;
}
GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_ITERATE_RESPONSE))
{
GNUNET_break (0);
- pal_ctx->cb (pal_ctx->cb_cls, NULL, NULL);
- GNUNET_TRANSPORT_peer_get_active_addresses_cancel (pal_ctx);
+ if (pal_ctx->one_shot)
+ {
+ pal_ctx->cb (pal_ctx->cb_cls, NULL, NULL);
+ GNUNET_TRANSPORT_peer_get_active_addresses_cancel (pal_ctx);
+ }
+ else
+ {
+ reconnect (pal_ctx);
+ }
return;
}
if (size != sizeof (struct AddressIterateResponseMessage) + tlen + alen)
{
GNUNET_break (0);
- pal_ctx->cb (pal_ctx->cb_cls, NULL, NULL);
- GNUNET_TRANSPORT_peer_get_active_addresses_cancel (pal_ctx);
+ if (pal_ctx->one_shot)
+ {
+ pal_ctx->cb (pal_ctx->cb_cls, NULL, NULL);
+ GNUNET_TRANSPORT_peer_get_active_addresses_cancel (pal_ctx);
+ }
+ else
+ {
+ reconnect (pal_ctx);
+ }
return;
}
if (transport_name[tlen - 1] != '\0')
{
- GNUNET_break_op (0);
- pal_ctx->cb (pal_ctx->cb_cls, NULL, NULL);
- GNUNET_TRANSPORT_peer_get_active_addresses_cancel (pal_ctx);
+ GNUNET_break (0);
+ if (pal_ctx->one_shot)
+ {
+ pal_ctx->cb (pal_ctx->cb_cls, NULL, NULL);
+ GNUNET_TRANSPORT_peer_get_active_addresses_cancel (pal_ctx);
+ }
+ else
+ {
+ reconnect (pal_ctx);
+ }
return;
}
/**
* Return all the known addresses for a specific peer or all peers.
- * Returns continously all address if one_shot is set to GNUNET_NO
+ * Returns continuously all address if one_shot is set to GNUNET_NO
*
* CHANGE: Returns the address(es) that we are currently using for this
* peer. Upon completion, the 'AddressLookUpCallback' is called one more
* time with 'NULL' for the address and the peer. After this, the operation must no
- * longer be explicitly cancelled.
+ * longer be explicitly canceled.
*
* @param cfg configuration to use
* @param peer peer identity to look up the addresses of, CHANGE: allow NULL for all (connected) peers
* @param one_shot GNUNET_YES to return the current state and then end (with NULL+NULL),
- * GNUNET_NO to monitor the set of addresses used (continuously, must be explicitly cancelled)
+ * GNUNET_NO to monitor the set of addresses used (continuously, must be explicitly canceled)
* @param timeout how long is the lookup allowed to take at most (irrelevant if one_shot is set to GNUNET_NO)
* @param peer_address_callback function to call with the results
* @param peer_address_callback_cls closure for peer_address_callback
void *peer_address_callback_cls)
{
struct GNUNET_TRANSPORT_PeerIterateContext *pal_ctx;
- struct AddressIterateMessage msg;
struct GNUNET_CLIENT_Connection *client;
- struct GNUNET_TIME_Absolute abs_timeout;
client = GNUNET_CLIENT_connect ("transport", cfg);
if (client == NULL)
return NULL;
if (GNUNET_YES != one_shot)
timeout = GNUNET_TIME_UNIT_FOREVER_REL;
- abs_timeout = GNUNET_TIME_relative_to_absolute (timeout);
- msg.header.size = htons (sizeof (struct AddressIterateMessage));
- msg.header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_ITERATE);
- msg.one_shot = htonl (one_shot);
- msg.timeout = GNUNET_TIME_absolute_hton (abs_timeout);
- if (peer == NULL)
- memset (&msg.peer, 0, sizeof (struct GNUNET_PeerIdentity));
- else
- msg.peer = *peer;
pal_ctx = GNUNET_malloc (sizeof (struct GNUNET_TRANSPORT_PeerIterateContext));
pal_ctx->cb = peer_address_callback;
pal_ctx->cb_cls = peer_address_callback_cls;
- pal_ctx->timeout = abs_timeout;
+ pal_ctx->cfg = cfg;
+ pal_ctx->timeout = GNUNET_TIME_relative_to_absolute (timeout);
+ if (NULL != peer)
+ pal_ctx->peer = *peer;
+ pal_ctx->one_shot = one_shot;
pal_ctx->client = client;
- GNUNET_assert (GNUNET_OK ==
- GNUNET_CLIENT_transmit_and_get_response (client, &msg.header,
- timeout, GNUNET_YES,
- &peer_address_response_processor,
- pal_ctx));
+ send_request (pal_ctx);
+
return pal_ctx;
}
GNUNET_TRANSPORT_PeerIterateContext
*alc)
{
- GNUNET_CLIENT_disconnect (alc->client, GNUNET_NO);
+ if (NULL != alc->client)
+ {
+ GNUNET_CLIENT_disconnect (alc->client);
+ alc->client = NULL;
+ }
+ if (GNUNET_SCHEDULER_NO_TASK != alc->reconnect_task)
+ {
+ GNUNET_SCHEDULER_cancel (alc->reconnect_task);
+ alc->reconnect_task = GNUNET_SCHEDULER_NO_TASK;
+ }
GNUNET_free (alc);
}
projects / oweals / gnunet.git / blobdiff