*/
#define MAX_ATTEMPTS 50
-
/**
* Handle for a transmission request.
*/
void *rn_cls;
};
-/**
- * Context for handling the shutdown of a service.
- */
-struct ShutdownContext
-{
- /**
- * Scheduler to be used to call continuation
- */
- struct GNUNET_SCHEDULER_Handle *sched;
- /**
- * Connection to the service that is being shutdown.
- */
- struct GNUNET_CLIENT_Connection *sock;
-
- /**
- * Time allowed for shutdown to happen.
- */
- struct GNUNET_TIME_Absolute timeout;
-
- /**
- * Task set up to cancel the shutdown request on timeout.
- */
- GNUNET_SCHEDULER_TaskIdentifier cancel_task;
-
- /**
- * Task to call once shutdown complete
- */
- GNUNET_CLIENT_ShutdownTask cont;
-
- /**
- * Closure for shutdown continuation
- */
- void *cont_cls;
-
- /**
- * We received a confirmation that the service will shut down.
- */
- int confirmed;
-
-};
-
/**
* Struct to refer to a GNUnet TCP connection.
* This is more than just a socket because if the server
*/
struct GNUNET_CONNECTION_Handle *sock;
- /**
- * Our scheduler.
- */
- struct GNUNET_SCHEDULER_Handle *sched;
-
/**
* Our configuration.
+ * FIXME: why do we DUP the configuration? Avoid this!
*/
struct GNUNET_CONFIGURATION_Handle *cfg;
* Are we ignoring shutdown signals?
*/
int ignore_shutdown;
+
+ /**
+ * How often have we tried to connect?
+ */
+ unsigned int attempts;
};
+/**
+ * Try to connect to the service.
+ *
+ * @param service_name name of service to connect to
+ * @param cfg configuration to use
+ * @param attempt counter used to alternate between IP and UNIX domain sockets
+ * @return NULL on error
+ */
static struct GNUNET_CONNECTION_Handle *
-do_connect (struct GNUNET_SCHEDULER_Handle *sched,
- const char *service_name,
- const struct GNUNET_CONFIGURATION_Handle *cfg)
+do_connect (const char *service_name,
+ const struct GNUNET_CONFIGURATION_Handle *cfg,
+ unsigned int attempt)
{
struct GNUNET_CONNECTION_Handle *sock;
char *hostname;
+ char *unixpath;
unsigned long long port;
+ sock = NULL;
+#if AF_UNIX
+ if (0 == (attempt % 2))
+ {
+ /* on even rounds, try UNIX */
+ if ((GNUNET_OK ==
+ GNUNET_CONFIGURATION_get_value_string (cfg,
+ service_name,
+ "UNIXPATH", &unixpath)) &&
+ (0 < strlen (unixpath))) /* We have a non-NULL unixpath, does that mean it's valid? */
+ {
+ sock = GNUNET_CONNECTION_create_from_connect_to_unixpath (cfg, unixpath);
+ if (sock != NULL)
+ {
+#if DEBUG_CLIENT
+ GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "Connected to unixpath `%s'!\n", unixpath);
+#endif
+ GNUNET_free(unixpath);
+ return sock;
+ }
+ }
+ GNUNET_free_non_null (unixpath);
+ }
+#endif
+
if ((GNUNET_OK !=
GNUNET_CONFIGURATION_get_value_number (cfg,
service_name,
"HOSTNAME", &hostname)))
{
GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
- _
- ("Could not determine valid hostname and port for service `%s' from configuration.\n"),
+ _("Could not determine valid hostname and port for service `%s' from configuration.\n"),
service_name);
return NULL;
}
service_name);
return NULL;
}
- sock = GNUNET_CONNECTION_create_from_connect (sched,
- cfg,
+ if (port == 0)
+ {
+#if AF_UNIX
+ if (0 != (attempt % 2))
+ {
+ /* try UNIX */
+ if ((GNUNET_OK ==
+ GNUNET_CONFIGURATION_get_value_string (cfg,
+ service_name,
+ "UNIXPATH", &unixpath)) &&
+ (0 < strlen (unixpath)))
+ {
+ sock = GNUNET_CONNECTION_create_from_connect_to_unixpath (cfg,
+ unixpath);
+ GNUNET_free (unixpath);
+ if (sock != NULL)
+ return sock;
+ }
+ }
+#endif
+#if DEBUG_CLIENT
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Port is 0 for service `%s', UNIXPATH did not work, returning NULL!\n",
+ service_name);
+#endif
+ GNUNET_free (hostname);
+ return NULL;
+ }
+
+ sock = GNUNET_CONNECTION_create_from_connect (cfg,
hostname,
- port,
- GNUNET_SERVER_MAX_MESSAGE_SIZE);
+ port);
GNUNET_free (hostname);
return sock;
}
/**
* Get a connection with a service.
*
- * @param sched scheduler to use
* @param service_name name of the service
* @param cfg configuration to use
* @return NULL on error (service unknown to configuration)
*/
struct GNUNET_CLIENT_Connection *
-GNUNET_CLIENT_connect (struct GNUNET_SCHEDULER_Handle *sched,
- const char *service_name,
+GNUNET_CLIENT_connect (const char *service_name,
const struct GNUNET_CONFIGURATION_Handle *cfg)
{
struct GNUNET_CLIENT_Connection *ret;
struct GNUNET_CONNECTION_Handle *sock;
- sock = do_connect (sched, service_name, cfg);
+ sock = do_connect (service_name,
+ cfg, 0);
if (sock == NULL)
return NULL;
ret = GNUNET_malloc (sizeof (struct GNUNET_CLIENT_Connection));
+ ret->attempts = 1;
ret->sock = sock;
- ret->sched = sched;
ret->service_name = GNUNET_strdup (service_name);
ret->cfg = GNUNET_CONFIGURATION_dup (cfg);
ret->back_off = GNUNET_TIME_UNIT_MILLISECONDS;
GNUNET_CLIENT_notify_transmit_ready_cancel (sock->th);
if (sock->receive_task != GNUNET_SCHEDULER_NO_TASK)
{
- GNUNET_SCHEDULER_cancel (sock->sched, sock->receive_task);
+ GNUNET_SCHEDULER_cancel (sock->receive_task);
sock->receive_task = GNUNET_SCHEDULER_NO_TASK;
}
GNUNET_array_grow (sock->received_buf, sock->received_size, 0);
if ((available == 0) || (conn->sock == NULL) || (errCode != 0))
{
/* signal timeout! */
+#if DEBUG_CLIENT
+ GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "timeout in receive_helper, available %d, conn->sock %s, errCode %d\n", available, conn->sock == NULL ? "NULL" : "non-NULL", errCode);
+#endif
if (NULL != (receive_handler = conn->receiver_handler))
{
receive_handler_cls = conn->receiver_handler_cls;
check_complete (conn);
/* check for timeout */
remaining = GNUNET_TIME_absolute_get_remaining (conn->receive_timeout);
- if (remaining.value == 0)
+ if (remaining.rel_value == 0)
{
/* signal timeout! */
conn->receiver_handler (conn->receiver_handler_cls, NULL);
char mbuf[msize];
struct GNUNET_MessageHeader *msg = (struct GNUNET_MessageHeader *) mbuf;
+#if DEBUG_CLIENT
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Received message of type %u and size %u\n",
+ ntohs (cmsg->type),
+ msize);
+#endif
sock->receive_task = GNUNET_SCHEDULER_NO_TASK;
GNUNET_assert (GNUNET_YES == sock->msg_complete);
GNUNET_assert (sock->received_pos >= msize);
sock->receive_timeout = GNUNET_TIME_relative_to_absolute (timeout);
if (GNUNET_YES == sock->msg_complete)
{
- sock->receive_task = GNUNET_SCHEDULER_add_after (sock->sched,
- GNUNET_SCHEDULER_NO_TASK,
+ sock->receive_task = GNUNET_SCHEDULER_add_after (GNUNET_SCHEDULER_NO_TASK,
&receive_task, sock);
}
else
{
+ GNUNET_assert (sock->in_receive == GNUNET_NO);
sock->in_receive = GNUNET_YES;
+#if DEBUG_CLIENT
+ GNUNET_log(GNUNET_ERROR_TYPE_DEBUG, "calling GNUNET_CONNECTION_receive\n");
+#endif
GNUNET_CONNECTION_receive (sock->sock,
- GNUNET_SERVER_MAX_MESSAGE_SIZE,
+ GNUNET_SERVER_MAX_MESSAGE_SIZE - 1,
timeout, &receive_helper, sock);
}
}
-/**
- * Handler receiving response to service shutdown requests.
- * First call with NULL: service misbehaving, or something.
- * First call with GNUNET_MESSAGE_TYPE_SHUTDOWN_ACK:
- * - service will shutdown
- * First call with GNUNET_MESSAGE_TYPE_SHUTDOWN_REFUSE:
- * - service will not be stopped!
- *
- * Second call with NULL:
- * - service has now really shut down.
- *
- * @param cls closure
- * @param msg NULL, indicating socket closure.
- */
-static void
-service_shutdown_handler (void *cls, const struct GNUNET_MessageHeader *msg)
-{
- struct ShutdownContext *shutdown_ctx = cls;
-
- if ((msg == NULL) && (shutdown_ctx->confirmed != GNUNET_YES))
- {
- /* Means the other side closed the connection and never confirmed a shutdown */
- GNUNET_log(GNUNET_ERROR_TYPE_WARNING,
- "Service handle shutdown before ACK!\n");
- if (shutdown_ctx->cont != NULL)
- shutdown_ctx->cont(shutdown_ctx->cont_cls, GNUNET_SYSERR);
- GNUNET_SCHEDULER_cancel(shutdown_ctx->sched, shutdown_ctx->cancel_task);
- GNUNET_CLIENT_disconnect (shutdown_ctx->sock, GNUNET_NO);
- GNUNET_free(shutdown_ctx);
- }
- else if ((msg == NULL) && (shutdown_ctx->confirmed == GNUNET_YES))
- {
- GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "Service shutdown complete.\n");
- if (shutdown_ctx->cont != NULL)
- shutdown_ctx->cont(shutdown_ctx->cont_cls, GNUNET_NO);
-
- GNUNET_SCHEDULER_cancel(shutdown_ctx->sched, shutdown_ctx->cancel_task);
- GNUNET_CLIENT_disconnect (shutdown_ctx->sock, GNUNET_NO);
- GNUNET_free(shutdown_ctx);
- }
- else
- {
- GNUNET_assert(ntohs(msg->size) == sizeof(struct GNUNET_MessageHeader));
-
- switch (ntohs(msg->type))
- {
- case GNUNET_MESSAGE_TYPE_SHUTDOWN_ACK:
- GNUNET_log(GNUNET_ERROR_TYPE_WARNING,
- "Received confirmation for service shutdown.\n");
- shutdown_ctx->confirmed = GNUNET_YES;
- GNUNET_CLIENT_receive (shutdown_ctx->sock,
- &service_shutdown_handler,
- shutdown_ctx,
- GNUNET_TIME_UNIT_FOREVER_REL);
- break;
- case GNUNET_MESSAGE_TYPE_SHUTDOWN_REFUSE:
- default: /* Fall through */
- GNUNET_log(GNUNET_ERROR_TYPE_WARNING,
- "Service shutdown refused!\n");
- if (shutdown_ctx->cont != NULL)
- shutdown_ctx->cont(shutdown_ctx->cont_cls, GNUNET_YES);
-
- GNUNET_SCHEDULER_cancel(shutdown_ctx->sched, shutdown_ctx->cancel_task);
- GNUNET_CLIENT_disconnect (shutdown_ctx->sock, GNUNET_NO);
- GNUNET_free(shutdown_ctx);
- break;
- }
- }
-}
-
-/**
- * Shutting down took too long, cancel receive and return error.
- *
- * @param cls closure
- * @param tc context information (why was this task triggered now)
- */
-void service_shutdown_cancel (void *cls,
- const struct GNUNET_SCHEDULER_TaskContext * tc)
-{
- struct ShutdownContext *shutdown_ctx = cls;
- GNUNET_log(GNUNET_ERROR_TYPE_WARNING, "service_shutdown_cancel called!\n");
- shutdown_ctx->cont(shutdown_ctx->cont_cls, GNUNET_SYSERR);
- GNUNET_CLIENT_disconnect (shutdown_ctx->sock, GNUNET_NO);
- GNUNET_free(shutdown_ctx);
-}
-
-
-/**
- * If possible, write a shutdown message to the target
- * buffer and destroy the client connection.
- *
- * @param cls the "struct GNUNET_CLIENT_Connection" to destroy
- * @param size number of bytes available in buf
- * @param buf NULL on error, otherwise target buffer
- * @return number of bytes written to buf
- */
-static size_t
-write_shutdown (void *cls, size_t size, void *buf)
-{
- struct GNUNET_MessageHeader *msg;
- struct ShutdownContext *shutdown_ctx = cls;
-
- if (size < sizeof (struct GNUNET_MessageHeader))
- {
- GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
- _("Failed to transmit shutdown request to client.\n"));
- shutdown_ctx->cont(shutdown_ctx->cont_cls, GNUNET_SYSERR);
- GNUNET_CLIENT_disconnect (shutdown_ctx->sock, GNUNET_NO);
- GNUNET_free(shutdown_ctx);
- return 0; /* client disconnected */
- }
-
- GNUNET_CLIENT_receive (shutdown_ctx->sock,
- &service_shutdown_handler, shutdown_ctx,
- GNUNET_TIME_UNIT_FOREVER_REL);
- shutdown_ctx->cancel_task = GNUNET_SCHEDULER_add_delayed (shutdown_ctx->sched,
- GNUNET_TIME_absolute_get_remaining(shutdown_ctx->timeout),
- &service_shutdown_cancel,
- shutdown_ctx);
- msg = (struct GNUNET_MessageHeader *) buf;
- msg->type = htons (GNUNET_MESSAGE_TYPE_SHUTDOWN);
- msg->size = htons (sizeof (struct GNUNET_MessageHeader));
- return sizeof (struct GNUNET_MessageHeader);
-}
-
-
-/**
- * Request that the service should shutdown.
- * Afterwards, the connection will automatically be
- * disconnected. Hence the "sock" should not
- * be used by the caller after this call
- * (calling this function frees "sock" after a while).
- *
- * @param sched the scheduler to use for calling shutdown continuation
- * @param sock the socket connected to the service
- * @param timeout how long to wait before giving up on transmission
- * @param cont continuation to call once the service is really down
- * @param cont_cls closure for continuation
- *
- */
-void
-GNUNET_CLIENT_service_shutdown (struct GNUNET_SCHEDULER_Handle *sched,
- struct GNUNET_CLIENT_Connection *sock,
- struct GNUNET_TIME_Relative timeout,
- GNUNET_CLIENT_ShutdownTask cont,
- void *cont_cls)
-{
- struct ShutdownContext *shutdown_ctx;
- shutdown_ctx = GNUNET_malloc(sizeof(struct ShutdownContext));
- shutdown_ctx->sched = sched;
- shutdown_ctx->cont = cont;
- shutdown_ctx->cont_cls = cont_cls;
- shutdown_ctx->sock = sock;
- shutdown_ctx->timeout = GNUNET_TIME_relative_to_absolute(timeout);
- GNUNET_CONNECTION_notify_transmit_ready (sock->sock,
- sizeof (struct
- GNUNET_MessageHeader),
- timeout,
- &write_shutdown, shutdown_ctx);
-}
-
-
/**
* Report service unavailable.
*/
static void
-service_test_error (struct GNUNET_SCHEDULER_Handle *s,
- GNUNET_SCHEDULER_Task task, void *task_cls)
+service_test_error (GNUNET_SCHEDULER_Task task, void *task_cls)
{
- GNUNET_SCHEDULER_add_continuation (s,
- task,
+ GNUNET_SCHEDULER_add_continuation (task,
task_cls,
GNUNET_SCHEDULER_REASON_TIMEOUT);
}
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Received confirmation that service is running.\n");
#endif
- GNUNET_SCHEDULER_add_continuation (conn->sched,
- conn->test_cb,
+ GNUNET_SCHEDULER_add_continuation (conn->test_cb,
conn->test_cb_cls,
GNUNET_SCHEDULER_REASON_PREREQ_DONE);
}
else
{
- service_test_error (conn->sched, conn->test_cb, conn->test_cb_cls);
+ service_test_error (conn->test_cb, conn->test_cb_cls);
}
GNUNET_CLIENT_disconnect (conn, GNUNET_NO);
}
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
_("Failure to transmit TEST request.\n"));
#endif
- service_test_error (conn->sched, conn->test_cb, conn->test_cb_cls);
+ service_test_error (conn->test_cb, conn->test_cb_cls);
GNUNET_CLIENT_disconnect (conn, GNUNET_NO);
return 0; /* client disconnected */
}
/**
* Wait until the service is running.
*
- * @param sched scheduler to use
* @param service name of the service to wait for
* @param cfg configuration to use
* @param timeout how long to wait at most in ms
* @param task_cls closure for task
*/
void
-GNUNET_CLIENT_service_test (struct GNUNET_SCHEDULER_Handle *sched,
- const char *service,
+GNUNET_CLIENT_service_test (const char *service,
const struct GNUNET_CONFIGURATION_Handle *cfg,
struct GNUNET_TIME_Relative timeout,
GNUNET_SCHEDULER_Task task, void *task_cls)
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Testing if service `%s' is running.\n", service);
#endif
- conn = GNUNET_CLIENT_connect (sched, service, cfg);
+ conn = GNUNET_CLIENT_connect (service, cfg);
if (conn == NULL)
{
GNUNET_log (GNUNET_ERROR_TYPE_INFO,
_
("Could not connect to service `%s', must not be running.\n"),
service);
- service_test_error (sched, task, task_cls);
+ service_test_error (task, task_cls);
return;
}
conn->test_cb = task;
GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
_("Failure to transmit request to service `%s'\n"),
service);
- service_test_error (sched, task, task_cls);
+ service_test_error (task, task_cls);
GNUNET_CLIENT_disconnect (conn, GNUNET_NO);
return;
}
if (buf == NULL)
{
delay = GNUNET_TIME_absolute_get_remaining (th->timeout);
- delay.value /= 2;
- if ( (0 != (GNUNET_SCHEDULER_REASON_SHUTDOWN & GNUNET_SCHEDULER_get_reason (th->sock->sched))) ||
+ delay.rel_value /= 2;
+ if ( (0 != (GNUNET_SCHEDULER_REASON_SHUTDOWN & GNUNET_SCHEDULER_get_reason ())) ||
(GNUNET_YES != th->auto_retry) ||
(0 == --th->attempts_left) ||
- (delay.value < 1) )
+ (delay.rel_value < 1) )
{
#if DEBUG_CLIENT
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
}
/* auto-retry */
GNUNET_CONNECTION_destroy (th->sock->sock, GNUNET_NO);
- th->sock->sock = do_connect (th->sock->sched,
- th->sock->service_name, th->sock->cfg);
+ th->sock->sock = do_connect (th->sock->service_name,
+ th->sock->cfg,
+ th->sock->attempts++);
GNUNET_assert (NULL != th->sock->sock);
GNUNET_CONNECTION_ignore_shutdown (th->sock->sock,
th->sock->ignore_shutdown);
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Transmission failed %u times, trying again in %llums.\n",
MAX_ATTEMPTS - th->attempts_left,
- (unsigned long long) delay.value);
+ (unsigned long long) delay.rel_value);
#endif
- th->reconnect_task = GNUNET_SCHEDULER_add_delayed (th->sock->sched,
- delay,
+ th->reconnect_task = GNUNET_SCHEDULER_add_delayed (delay,
&client_delayed_retry,
th);
th->sock->th = th;
if (th->reconnect_task != GNUNET_SCHEDULER_NO_TASK)
{
GNUNET_break (NULL == th->th);
- GNUNET_SCHEDULER_cancel (th->sock->sched, th->reconnect_task);
+ GNUNET_SCHEDULER_cancel (th->reconnect_task);
th->reconnect_task = GNUNET_SCHEDULER_NO_TASK;
}
else
{
- GNUNET_break (NULL != th->th);
+ GNUNET_assert (NULL != th->th);
GNUNET_CONNECTION_notify_transmit_ready_cancel (th->th);
}
th->sock->th = NULL;
projects / oweals / gnunet.git / blobdiff