* @file nse/nse_api.c
* @brief api to get information from the network size estimation service
* @author Nathan Evans
- *
- * TODO:
*/
#include "platform.h"
#include "gnunet_client_lib.h"
#include "gnunet_nse_service.h"
#include "nse.h"
+#define LOG(kind,...) GNUNET_log_from (kind, "nse-api",__VA_ARGS__)
/**
* Handle for the service.
*/
struct GNUNET_TIME_Relative reconnect_delay;
- /**
- * Should this handle auto-destruct once all actions have
- * been processed?
- */
- int do_destroy;
-
- /**
- * Are we currently receiving from the service?
- */
- int receiving;
-
/**
* Callback function to call when message is received.
*/
};
+/**
+ * Try again to connect to network size estimation service.
+ *
+ * @param cls the handle to the transport service
+ * @param tc scheduler context
+ */
+static void
+reconnect (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
+
+
/**
* Type of a function to call when we receive a message
* from the service.
* @param cls closure
* @param msg message received, NULL on timeout or fatal error
*/
-void message_handler (void *cls,
- const struct GNUNET_MessageHeader * msg)
+static void
+message_handler (void *cls, const struct GNUNET_MessageHeader *msg)
{
struct GNUNET_NSE_Handle *h = cls;
- struct GNUNET_NSE_ClientMessage *client_msg;
-
- if (msg == NULL) /* Error, timeout, death */
+ const struct GNUNET_NSE_ClientMessage *client_msg;
+
+ if (msg == NULL)
+ {
+ /* Error, timeout, death */
+ GNUNET_CLIENT_disconnect (h->client);
+ h->client = NULL;
+ h->reconnect_task =
+ GNUNET_SCHEDULER_add_delayed (h->reconnect_delay, &reconnect, h);
return;
-
- if ((ntohs (msg->size) < sizeof(struct GNUNET_NSE_ClientMessage))
- || (ntohs (msg->type) != GNUNET_MESSAGE_TYPE_NSE_ESTIMATE))
- {
-#if DEBUG_NSE
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "%s: received incorrect message (size %d < %d) from service!",
- "NSE API", ntohs (msg->size),
- sizeof(struct GNUNET_NSE_ClientMessage));
-#endif
- return;
- }
-
- client_msg = (struct GNUNET_NSE_ClientMessage *)msg;
-
- h->recv_cb (h->recv_cb_cls, client_msg->size_estimate,
- client_msg->std_deviation);
-
- GNUNET_CLIENT_receive (h->client,
- &message_handler, h, GNUNET_TIME_UNIT_FOREVER_REL);
+ }
+ if ((ntohs (msg->size) != sizeof (struct GNUNET_NSE_ClientMessage)) ||
+ (ntohs (msg->type) != GNUNET_MESSAGE_TYPE_NSE_ESTIMATE))
+ {
+ GNUNET_break (0);
+ return;
+ }
+ client_msg = (const struct GNUNET_NSE_ClientMessage *) msg;
+ h->recv_cb (h->recv_cb_cls, GNUNET_TIME_absolute_ntoh (client_msg->timestamp),
+ GNUNET_ntoh_double (client_msg->size_estimate),
+ GNUNET_ntoh_double (client_msg->std_deviation));
+ GNUNET_CLIENT_receive (h->client, &message_handler, h,
+ GNUNET_TIME_UNIT_FOREVER_REL);
}
-static void
-reconnect (void *cls,
- const struct GNUNET_SCHEDULER_TaskContext *tc);
+
/**
* Reschedule a connect attempt to the service.
GNUNET_assert (h->reconnect_task == GNUNET_SCHEDULER_NO_TASK);
if (NULL != h->th)
- {
- GNUNET_CLIENT_notify_transmit_ready_cancel (h->th);
- h->th = NULL;
- }
+ {
+ GNUNET_CLIENT_notify_transmit_ready_cancel (h->th);
+ h->th = NULL;
+ }
if (NULL != h->client)
- {
- GNUNET_CLIENT_disconnect (h->client, GNUNET_NO);
- h->client = NULL;
- }
-
-#if DEBUG_NSE
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Scheduling task to reconnect to nse service in %llu ms.\n",
- h->reconnect_delay.rel_value);
-#endif
- h->reconnect_task
- = GNUNET_SCHEDULER_add_delayed (h->reconnect_delay,
- &reconnect, h);
- if (h->reconnect_delay.rel_value == 0)
- {
- h->reconnect_delay = GNUNET_TIME_UNIT_MILLISECONDS;
- }
- else
- {
- h->reconnect_delay = GNUNET_TIME_relative_multiply (h->reconnect_delay, 2);
- h->reconnect_delay = GNUNET_TIME_relative_min (GNUNET_TIME_UNIT_SECONDS,
- h->reconnect_delay);
- }
+ {
+ GNUNET_CLIENT_disconnect (h->client);
+ h->client = NULL;
+ }
+
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Scheduling task to reconnect to nse service in %llu ms.\n",
+ h->reconnect_delay.rel_value);
+ h->reconnect_task =
+ GNUNET_SCHEDULER_add_delayed (h->reconnect_delay, &reconnect, h);
+ h->reconnect_delay = GNUNET_TIME_STD_BACKOFF (h->reconnect_delay);
}
+
/**
* Transmit START message to service.
*
struct GNUNET_MessageHeader *msg;
h->th = NULL;
- if (buf == NULL)
- {
- /* Connect error... */
-#if DEBUG_NSE
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Shutdown while trying to transmit `%s' request.\n",
- "START");
-#endif
- reschedule_connect(h);
- return 0;
- }
-#if DEBUG_NSE
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Transmitting `%s' request.\n", "START");
-#endif
+ if (NULL == buf)
+ {
+ /* Connect error... */
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Error while trying to transmit `%s' request.\n", "START");
+ reschedule_connect (h);
+ return 0;
+ }
+ LOG (GNUNET_ERROR_TYPE_DEBUG, "Transmitting `%s' request.\n", "START");
GNUNET_assert (size >= sizeof (struct GNUNET_MessageHeader));
- msg = (struct GNUNET_MessageHeader *)buf;
+ msg = (struct GNUNET_MessageHeader *) buf;
msg->size = htons (sizeof (struct GNUNET_MessageHeader));
msg->type = htons (GNUNET_MESSAGE_TYPE_NSE_START);
- GNUNET_CLIENT_receive (h->client,
- &message_handler, h, GNUNET_TIME_UNIT_FOREVER_REL);
+ GNUNET_CLIENT_receive (h->client, &message_handler, h,
+ GNUNET_TIME_UNIT_FOREVER_REL);
return sizeof (struct GNUNET_MessageHeader);
}
+
/**
* Try again to connect to network size estimation service.
*
* @param tc scheduler context
*/
static void
-reconnect (void *cls,
- const struct GNUNET_SCHEDULER_TaskContext *tc)
+reconnect (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
{
struct GNUNET_NSE_Handle *h = cls;
h->reconnect_task = GNUNET_SCHEDULER_NO_TASK;
- if ((tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN) != 0)
- {
- /* shutdown, just give up */
- return;
- }
-#if DEBUG_NSE
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Connecting to network size estimation service.\n");
-#endif
- GNUNET_assert (h->client == NULL);
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Connecting to network size estimation service.\n");
+ GNUNET_assert (NULL == h->client);
h->client = GNUNET_CLIENT_connect ("nse", h->cfg);
- GNUNET_assert (h->client != NULL);
-
+ GNUNET_assert (NULL != h->client);
+ GNUNET_assert (NULL == h->th);
h->th =
- GNUNET_CLIENT_notify_transmit_ready (h->client,
- sizeof(struct GNUNET_MessageHeader),
- GNUNET_TIME_UNIT_FOREVER_REL,
- GNUNET_NO,
- &send_start,
- h);
- GNUNET_assert(h->th != NULL);
+ GNUNET_CLIENT_notify_transmit_ready (h->client,
+ sizeof (struct GNUNET_MessageHeader),
+ GNUNET_TIME_UNIT_FOREVER_REL,
+ GNUNET_NO, &send_start, h);
+ GNUNET_assert (NULL != h->th);
}
+
/**
* Connect to the network size estimation service.
*
{
struct GNUNET_NSE_Handle *ret;
+ GNUNET_assert (func != NULL);
ret = GNUNET_malloc (sizeof (struct GNUNET_NSE_Handle));
-
- if (func == NULL)
- return NULL;
-
ret->cfg = cfg;
ret->recv_cb = func;
ret->recv_cb_cls = func_cls;
return ret;
}
+
/**
* Disconnect from network size estimation service
*
* @param h handle to destroy
- *
*/
void
GNUNET_NSE_disconnect (struct GNUNET_NSE_Handle *h)
{
- GNUNET_assert(h != NULL);
+ GNUNET_assert (NULL != h);
if (h->reconnect_task != GNUNET_SCHEDULER_NO_TASK)
- {
- GNUNET_SCHEDULER_cancel(h->reconnect_task);
- h->reconnect_task = GNUNET_SCHEDULER_NO_TASK;
- }
- if (h->th != NULL)
- GNUNET_CLIENT_notify_transmit_ready_cancel(h->th);
- if (h->client != NULL)
- GNUNET_CLIENT_disconnect(h->client, GNUNET_NO);
-
- GNUNET_free(h);
+ {
+ GNUNET_SCHEDULER_cancel (h->reconnect_task);
+ h->reconnect_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;
+ }
+ GNUNET_free (h);
}
+
+/* end of nse_api.c */
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