/*
This file is part of GNUnet.
- (C) 2009 Christian Grothoff (and other contributing authors)
+ (C) 2009, 2010, 2012 Christian Grothoff (and other contributing authors)
GNUnet is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published
- by the Free Software Foundation; either version 2, or (at your
+ by the Free Software Foundation; either version 3, or (at your
option) any later version.
GNUnet is distributed in the hope that it will be useful, but
*/
#include "platform.h"
#include "gnunet_arm_service.h"
-#include "gnunet_client_lib.h"
-#include "gnunet_getopt_lib.h"
-#include "gnunet_os_lib.h"
+#include "gnunet_util_lib.h"
#include "gnunet_protocols.h"
-#include "gnunet_server_lib.h"
#include "arm.h"
-
-/**
- * How long are we willing to wait for a service operation during the multi-operation
- * request processing?
- */
-#define MULTI_TIMEOUT GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_SECONDS, 5)
-
+#define LOG(kind,...) GNUNET_log_from (kind, "arm-api",__VA_ARGS__)
/**
* Handle for interacting with ARM.
- */
+ */
struct GNUNET_ARM_Handle
{
*/
struct GNUNET_CONFIGURATION_Handle *cfg;
+};
+
+/**
+ * Context for handling the shutdown of a service.
+ */
+struct ShutdownContext
+{
+ /**
+ * 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;
+
/**
- * Scheduler to use.
+ * Closure for shutdown continuation
*/
- struct GNUNET_SCHEDULER_Handle *sched;
+ void *cont_cls;
+
+ /**
+ * Handle for transmission request.
+ */
+ struct GNUNET_CLIENT_TransmitHandle *th;
};
+/**
+ * Handler receiving response to service shutdown requests.
+ * First call with NULL: service misbehaving, or something.
+ * First call with GNUNET_MESSAGE_TYPE_ARM_SHUTDOWN_ACK:
+ * - service will shutdown
+ * 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 (NULL != msg)
+ {
+ /* We just expected a disconnect! Report the error and be done with it... */
+ GNUNET_break (0);
+ shutdown_ctx->cont (shutdown_ctx->cont_cls, GNUNET_ARM_PROCESS_COMMUNICATION_ERROR);
+ GNUNET_SCHEDULER_cancel (shutdown_ctx->cancel_task);
+ GNUNET_CLIENT_disconnect (shutdown_ctx->sock);
+ GNUNET_free (shutdown_ctx);
+ return;
+ }
+ if (NULL != shutdown_ctx->cont)
+ /* shutdown is now complete, as we waited for the network disconnect... */
+ shutdown_ctx->cont (shutdown_ctx->cont_cls, GNUNET_ARM_PROCESS_DOWN);
+ GNUNET_SCHEDULER_cancel (shutdown_ctx->cancel_task);
+ GNUNET_CLIENT_disconnect (shutdown_ctx->sock);
+ GNUNET_free (shutdown_ctx);
+}
+
+
+/**
+ * Shutting down took too long, cancel receive and return error.
+ *
+ * @param cls closure
+ * @param tc context information (why was this task triggered now)
+ */
+static void
+service_shutdown_cancel (void *cls,
+ const struct GNUNET_SCHEDULER_TaskContext *tc)
+{
+ struct ShutdownContext *shutdown_ctx = cls;
+
+ shutdown_ctx->cont (shutdown_ctx->cont_cls, GNUNET_ARM_PROCESS_COMMUNICATION_TIMEOUT);
+ GNUNET_CLIENT_disconnect (shutdown_ctx->sock);
+ 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 ShutdownContext *shutdown_ctx = cls;
+ struct GNUNET_MessageHeader *msg;
+
+ shutdown_ctx->th = NULL;
+ if (size < sizeof (struct GNUNET_MessageHeader))
+ {
+ LOG (GNUNET_ERROR_TYPE_WARNING,
+ _("Failed to transmit shutdown request to client.\n"));
+ shutdown_ctx->cont (shutdown_ctx->cont_cls, GNUNET_ARM_PROCESS_COMMUNICATION_ERROR);
+ GNUNET_CLIENT_disconnect (shutdown_ctx->sock);
+ 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 (GNUNET_TIME_absolute_get_remaining
+ (shutdown_ctx->timeout),
+ &service_shutdown_cancel, shutdown_ctx);
+ msg = (struct GNUNET_MessageHeader *) buf;
+ msg->type = htons (GNUNET_MESSAGE_TYPE_ARM_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 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
+ *
+ */
+static void
+arm_service_shutdown (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->cont = cont;
+ shutdown_ctx->cont_cls = cont_cls;
+ shutdown_ctx->sock = sock;
+ shutdown_ctx->timeout = GNUNET_TIME_relative_to_absolute (timeout);
+ shutdown_ctx->th = GNUNET_CLIENT_notify_transmit_ready (sock,
+ sizeof (struct GNUNET_MessageHeader),
+ timeout, GNUNET_NO, &write_shutdown,
+ shutdown_ctx);
+}
+
+
/**
* Setup a context for communicating with ARM. Note that this
* can be done even if the ARM service is not yet running.
* @param cfg configuration to use (needed to contact ARM;
* the ARM service may internally use a different
* configuration to determine how to start the service).
- * @param sched scheduler to use
* @param service service that *this* process is implementing/providing, can be NULL
* @return context to use for further ARM operations, NULL on error
*/
struct GNUNET_ARM_Handle *
GNUNET_ARM_connect (const struct GNUNET_CONFIGURATION_Handle *cfg,
- struct GNUNET_SCHEDULER_Handle *sched,
const char *service)
{
struct GNUNET_ARM_Handle *ret;
- struct GNUNET_CLIENT_Connection *client;
- client = GNUNET_CLIENT_connect (sched, "arm", cfg);
- if (client == NULL)
- return NULL;
- GNUNET_CLIENT_ignore_shutdown (client, GNUNET_YES);
ret = GNUNET_malloc (sizeof (struct GNUNET_ARM_Handle));
ret->cfg = GNUNET_CONFIGURATION_dup (cfg);
- ret->sched = sched;
- ret->client = client;
return ret;
}
}
+struct ARM_ShutdownContext
+{
+ /**
+ * Callback to call once shutdown complete.
+ */
+ GNUNET_ARM_Callback cb;
+
+ /**
+ * Closure for callback.
+ */
+ void *cb_cls;
+};
+
+
/**
* Internal state for a request with ARM.
*/
*/
uint16_t type;
+ /**
+ * Flags for passing std descriptors to ARM (when starting ARM).
+ */
+ enum GNUNET_OS_InheritStdioFlags std_inheritance;
+
};
#include "do_start_process.c"
* @param tc why were we called (reason says if ARM is running)
*/
static void
-arm_service_report (void *cls,
- const struct GNUNET_SCHEDULER_TaskContext *tc)
+arm_service_report (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
{
struct RequestContext *pos = cls;
- pid_t pid;
+ struct GNUNET_OS_Process *proc;
char *binary;
char *config;
char *loprefix;
char *lopostfix;
if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_PREREQ_DONE))
- {
-#if DEBUG_ARM
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Looks like `%s' is already running.\n",
- "gnunet-service-arm");
-#endif
- /* arm is running! */
- if (pos->callback != NULL)
- pos->callback (pos->cls, GNUNET_YES);
- GNUNET_free (pos);
- return;
- }
-#if DEBUG_ARM
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Looks like `%s' is not running, will start it.\n",
- "gnunet-service-arm");
-#endif
- /* FIXME: should we check that HOSTNAME for 'arm' is localhost? */
-
- if (GNUNET_OK !=
- GNUNET_CONFIGURATION_get_value_string (pos->h->cfg,
- "arm", "PREFIX", &loprefix))
+ {
+ LOG (GNUNET_ERROR_TYPE_DEBUG, "Looks like `%s' is already running.\n",
+ "gnunet-service-arm");
+ /* arm is running! */
+ if (pos->callback != NULL)
+ pos->callback (pos->cls, GNUNET_ARM_PROCESS_ALREADY_RUNNING);
+ GNUNET_free (pos);
+ return;
+ }
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Looks like `%s' is not running, will start it.\n",
+ "gnunet-service-arm");
+ if (GNUNET_OK !=
+ GNUNET_CONFIGURATION_get_value_string (pos->h->cfg, "arm", "PREFIX",
+ &loprefix))
loprefix = GNUNET_strdup ("");
if (GNUNET_OK !=
- GNUNET_CONFIGURATION_get_value_string (pos->h->cfg,
- "arm", "OPTIONS", &lopostfix))
+ GNUNET_CONFIGURATION_get_value_string (pos->h->cfg, "arm", "OPTIONS",
+ &lopostfix))
lopostfix = GNUNET_strdup ("");
if (GNUNET_OK !=
- GNUNET_CONFIGURATION_get_value_string (pos->h->cfg,
- "arm",
- "BINARY",
+ GNUNET_CONFIGURATION_get_value_string (pos->h->cfg, "arm", "BINARY",
&binary))
- {
- GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
- _("Configuration failes to specify option `%s' in section `%s'!\n"),
- "BINARY",
- "arm");
- if (pos->callback != NULL)
- pos->callback (pos->cls, GNUNET_SYSERR);
- GNUNET_free (pos);
- GNUNET_free (loprefix);
- GNUNET_free (lopostfix);
- return;
- }
+ {
+ GNUNET_log_config_missing (GNUNET_ERROR_TYPE_WARNING,
+ "arm", "BINARY");
+ if (pos->callback != NULL)
+ pos->callback (pos->cls, GNUNET_ARM_PROCESS_UNKNOWN);
+ GNUNET_free (pos);
+ GNUNET_free (loprefix);
+ GNUNET_free (lopostfix);
+ return;
+ }
if (GNUNET_OK !=
- GNUNET_CONFIGURATION_get_value_filename (pos->h->cfg,
- "arm", "CONFIG", &config))
- {
- GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
- _("Configuration fails to specify option `%s' in section `%s'!\n"),
- "CONFIG",
- "arm");
- if (pos->callback != NULL)
- pos->callback (pos->cls, GNUNET_SYSERR);
- GNUNET_free (binary);
- GNUNET_free (pos);
- GNUNET_free (loprefix);
- GNUNET_free (lopostfix);
- return;
- }
- pid = do_start_process (loprefix,
- binary,
- "-c", config,
-#if DEBUG_ARM
- "-L", "DEBUG",
-#endif
- "-d",
- lopostfix,
- NULL);
+ GNUNET_CONFIGURATION_get_value_filename (pos->h->cfg, "arm", "CONFIG",
+ &config))
+ {
+ GNUNET_log_config_missing (GNUNET_ERROR_TYPE_WARNING,
+ "arm", "CONFIG");
+ if (pos->callback != NULL)
+ pos->callback (pos->cls, GNUNET_ARM_PROCESS_UNKNOWN);
+ GNUNET_free (binary);
+ GNUNET_free (pos);
+ GNUNET_free (loprefix);
+ GNUNET_free (lopostfix);
+ return;
+ }
+ if ((GNUNET_YES ==
+ GNUNET_CONFIGURATION_have_value (pos->h->cfg, "TESTING", "WEAKRANDOM"))
+ && (GNUNET_YES ==
+ GNUNET_CONFIGURATION_get_value_yesno (pos->h->cfg, "TESTING",
+ "WEAKRANDOM"))
+ && (GNUNET_NO ==
+ GNUNET_CONFIGURATION_have_value (pos->h->cfg, "TESTING",
+ "HOSTFILE")))
+ {
+ /* Means we are ONLY running locally */
+ /* we're clearly running a test, don't daemonize */
+ proc = do_start_process (GNUNET_NO, pos->std_inheritance,
+ NULL, loprefix, binary, "-c", config,
+ /* no daemonization! */
+ lopostfix, NULL);
+ }
+ else
+ {
+ proc = do_start_process (GNUNET_NO, pos->std_inheritance,
+ NULL, loprefix, binary, "-c", config,
+ "-d", lopostfix, NULL);
+ }
GNUNET_free (binary);
GNUNET_free (config);
GNUNET_free (loprefix);
GNUNET_free (lopostfix);
- if (pid == -1)
+ if (proc == NULL)
{
if (pos->callback != NULL)
- pos->callback (pos->cls, GNUNET_SYSERR);
+ pos->callback (pos->cls, GNUNET_ARM_PROCESS_FAILURE);
GNUNET_free (pos);
return;
}
if (pos->callback != NULL)
- pos->callback (pos->cls, GNUNET_YES);
+ pos->callback (pos->cls, GNUNET_ARM_PROCESS_STARTING);
+ GNUNET_free (proc);
GNUNET_free (pos);
}
* Process a response from ARM to a request for a change in service
* status.
*
- * @param cls the request context
+ * @param cls the request context
* @param msg the response
*/
static void
handle_response (void *cls, const struct GNUNET_MessageHeader *msg)
{
struct RequestContext *sc = cls;
- int ret;
-
- if (msg == NULL)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
- _("Error receiving response to `%s' request from ARM for service `%s'\n"),
- (sc->type == GNUNET_MESSAGE_TYPE_ARM_START)
- ? "START"
- : "STOP",
- (const char*) &sc[1]);
- GNUNET_CLIENT_disconnect (sc->h->client);
- sc->h->client = GNUNET_CLIENT_connect (sc->h->sched,
- "arm",
- sc->h->cfg);
- GNUNET_assert (NULL != sc->h->client);
- GNUNET_CLIENT_ignore_shutdown (sc->h->client, GNUNET_YES);
- if (sc->callback != NULL)
- sc->callback (sc->cls, GNUNET_SYSERR);
- GNUNET_free (sc);
- return;
- }
-#if DEBUG_ARM
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Received response from ARM for service `%s': %u\n",
- (const char*) &sc[1],
- ntohs(msg->type));
-#endif
- switch (ntohs (msg->type))
- {
- case GNUNET_MESSAGE_TYPE_ARM_IS_UP:
- ret = GNUNET_YES;
- break;
- case GNUNET_MESSAGE_TYPE_ARM_IS_DOWN:
- ret = GNUNET_NO;
- break;
- case GNUNET_MESSAGE_TYPE_ARM_IS_UNKNOWN:
- ret = GNUNET_SYSERR;
- break;
- default:
- GNUNET_break (0);
- ret = GNUNET_SYSERR;
- }
+ const struct GNUNET_ARM_ResultMessage *res;
+ enum GNUNET_ARM_ProcessStatus status;
+
+ if ((msg == NULL) ||
+ (ntohs (msg->size) != sizeof (struct GNUNET_ARM_ResultMessage)))
+ {
+ GNUNET_break (0);
+ GNUNET_CLIENT_disconnect (sc->h->client);
+ sc->h->client = GNUNET_CLIENT_connect ("arm", sc->h->cfg);
+ GNUNET_assert (NULL != sc->h->client);
+ if (sc->callback != NULL)
+ sc->callback (sc->cls, GNUNET_ARM_PROCESS_COMMUNICATION_ERROR);
+ GNUNET_free (sc);
+ return;
+ }
+ res = (const struct GNUNET_ARM_ResultMessage *) msg;
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Received response from ARM for service `%s': %u\n",
+ (const char *) &sc[1], ntohs (msg->type));
+ status = (enum GNUNET_ARM_ProcessStatus) ntohl (res->status);
if (sc->callback != NULL)
- sc->callback (sc->cls, ret);
+ sc->callback (sc->cls, status);
GNUNET_free (sc);
}
* @param timeout how long to wait before failing for good
* @param cb callback to invoke when service is ready
* @param cb_cls closure for callback
- * @param type type of the request
+ * @param type type of the request
*/
static void
-change_service (struct GNUNET_ARM_Handle *h,
- const char *service_name,
- struct GNUNET_TIME_Relative timeout,
- GNUNET_ARM_Callback cb, void *cb_cls, uint16_t type)
+change_service (struct GNUNET_ARM_Handle *h, const char *service_name,
+ struct GNUNET_TIME_Relative timeout, GNUNET_ARM_Callback cb,
+ void *cb_cls, uint16_t type)
{
struct RequestContext *sctx;
size_t slen;
struct GNUNET_MessageHeader *msg;
slen = strlen (service_name) + 1;
- if (slen + sizeof (struct GNUNET_MessageHeader) >
+ if (slen + sizeof (struct GNUNET_MessageHeader) >=
GNUNET_SERVER_MAX_MESSAGE_SIZE)
- {
- GNUNET_break (0);
- if (cb != NULL)
- cb (cb_cls, GNUNET_NO);
- return;
- }
-#if DEBUG_ARM
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- (type == GNUNET_MESSAGE_TYPE_ARM_START)
- ? _("Requesting start of service `%s'.\n")
- : _("Requesting termination of service `%s'.\n"),
- service_name);
-#endif
+ {
+ GNUNET_break (0);
+ if (cb != NULL)
+ cb (cb_cls, GNUNET_NO);
+ return;
+ }
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ (type ==
+ GNUNET_MESSAGE_TYPE_ARM_START) ?
+ "Requesting start of service `%s'.\n" :
+ "Requesting termination of service `%s'.\n", service_name);
sctx = GNUNET_malloc (sizeof (struct RequestContext) + slen);
sctx->h = h;
sctx->callback = cb;
msg->type = htons (sctx->type);
memcpy (&msg[1], service_name, slen);
if (GNUNET_OK !=
- GNUNET_CLIENT_transmit_and_get_response (sctx->h->client,
- msg,
- GNUNET_TIME_absolute_get_remaining (sctx->timeout),
- GNUNET_YES,
- &handle_response,
- sctx))
- {
- GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
- (type == GNUNET_MESSAGE_TYPE_ARM_START)
- ? _("Error while trying to transmit request to start `%s' to ARM\n")
- : _("Error while trying to transmit request to stop `%s' to ARM\n"),
- (const char*) &service_name);
- if (cb != NULL)
- cb (cb_cls, GNUNET_SYSERR);
- GNUNET_free (sctx);
- GNUNET_free (msg);
- return;
- }
+ GNUNET_CLIENT_transmit_and_get_response (sctx->h->client, msg,
+ GNUNET_TIME_absolute_get_remaining
+ (sctx->timeout), GNUNET_YES,
+ &handle_response, sctx))
+ {
+ GNUNET_break (0);
+ if (cb != NULL)
+ cb (cb_cls, GNUNET_SYSERR);
+ GNUNET_free (sctx);
+ GNUNET_free (msg);
+ return;
+ }
GNUNET_free (msg);
}
*
* @param h handle to ARM
* @param service_name name of the service
+ * @param std_inheritance inheritance of std streams
* @param timeout how long to wait before failing for good
* @param cb callback to invoke when service is ready
* @param cb_cls closure for callback
void
GNUNET_ARM_start_service (struct GNUNET_ARM_Handle *h,
const char *service_name,
- struct GNUNET_TIME_Relative timeout,
- GNUNET_ARM_Callback cb, void *cb_cls)
+ enum GNUNET_OS_InheritStdioFlags std_inheritance,
+ struct GNUNET_TIME_Relative timeout,
+ GNUNET_ARM_Callback cb, void *cb_cls)
{
struct RequestContext *sctx;
+ struct GNUNET_CLIENT_Connection *client;
size_t slen;
- GNUNET_log (GNUNET_ERROR_TYPE_INFO,
- _("Asked to start service `%s' within %llu ms\n"), service_name,
- (unsigned long long) timeout.value);
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Asked to start service `%s' within %s\n", service_name,
+ GNUNET_STRINGS_relative_time_to_string (timeout, GNUNET_NO));
if (0 == strcasecmp ("arm", service_name))
+ {
+ slen = strlen ("arm") + 1;
+ sctx = GNUNET_malloc (sizeof (struct RequestContext) + slen);
+ sctx->h = h;
+ sctx->callback = cb;
+ sctx->cls = cb_cls;
+ sctx->timeout = GNUNET_TIME_relative_to_absolute (timeout);
+ sctx->std_inheritance = std_inheritance;
+ memcpy (&sctx[1], service_name, slen);
+ GNUNET_CLIENT_service_test ("arm", h->cfg, timeout, &arm_service_report,
+ sctx);
+ return;
+ }
+ if (NULL == h->client)
+ {
+ client = GNUNET_CLIENT_connect ("arm", h->cfg);
+ if (client == NULL)
{
- slen = strlen ("arm") + 1;
- sctx = GNUNET_malloc (sizeof (struct RequestContext) + slen);
- sctx->h = h;
- sctx->callback = cb;
- sctx->cls = cb_cls;
- sctx->timeout = GNUNET_TIME_relative_to_absolute (timeout);
- memcpy (&sctx[1], service_name, slen);
- GNUNET_CLIENT_service_test (h->sched,
- "arm",
- h->cfg, timeout, &arm_service_report, sctx);
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "arm_api, GNUNET_CLIENT_connect returned NULL\n");
+ cb (cb_cls, GNUNET_ARM_PROCESS_COMMUNICATION_ERROR);
return;
}
- change_service (h, service_name, timeout, cb, cb_cls, GNUNET_MESSAGE_TYPE_ARM_START);
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "arm_api, GNUNET_CLIENT_connect returned non-NULL\n");
+ h->client = client;
+ }
+ LOG (GNUNET_ERROR_TYPE_DEBUG, "arm_api, h->client non-NULL\n");
+ change_service (h, service_name, timeout, cb, cb_cls,
+ GNUNET_MESSAGE_TYPE_ARM_START);
+}
+
+
+/**
+ * Callback from the arm stop service call, indicates that the arm service
+ * is well and truly dead, won't die, or an error occurred.
+ *
+ * @param cls closure for the callback
+ * @param reason reason for callback
+ */
+static void
+arm_shutdown_callback (void *cls, enum GNUNET_ARM_ProcessStatus reason)
+{
+ struct ARM_ShutdownContext *arm_shutdown_ctx = cls;
+
+ if (arm_shutdown_ctx->cb != NULL)
+ arm_shutdown_ctx->cb (arm_shutdown_ctx->cb_cls, reason);
+ GNUNET_free (arm_shutdown_ctx);
}
void
GNUNET_ARM_stop_service (struct GNUNET_ARM_Handle *h,
const char *service_name,
- struct GNUNET_TIME_Relative timeout,
- GNUNET_ARM_Callback cb, void *cb_cls)
+ struct GNUNET_TIME_Relative timeout,
+ GNUNET_ARM_Callback cb, void *cb_cls)
{
- GNUNET_log (GNUNET_ERROR_TYPE_INFO,
- _("Stopping service `%s' within %llu ms\n"), service_name,
- (unsigned long long) timeout.value);
- if (0 == strcasecmp ("arm", service_name))
+ struct ARM_ShutdownContext *arm_shutdown_ctx;
+ struct GNUNET_CLIENT_Connection *client;
+
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Stopping service `%s' within %s\n",
+ service_name,
+ GNUNET_STRINGS_relative_time_to_string (timeout, GNUNET_NO));
+ if (h->client == NULL)
+ {
+ client = GNUNET_CLIENT_connect ("arm", h->cfg);
+ if (client == NULL)
{
- GNUNET_CLIENT_service_shutdown (h->client);
- h->client = NULL;
- if (cb != NULL)
- cb (cb_cls, GNUNET_NO);
+ cb (cb_cls, GNUNET_SYSERR);
return;
}
- change_service (h, service_name, timeout, cb, cb_cls, GNUNET_MESSAGE_TYPE_ARM_STOP);
+ h->client = client;
+ }
+ if (0 == strcasecmp ("arm", service_name))
+ {
+ arm_shutdown_ctx = GNUNET_malloc (sizeof (struct ARM_ShutdownContext));
+ arm_shutdown_ctx->cb = cb;
+ arm_shutdown_ctx->cb_cls = cb_cls;
+ arm_service_shutdown (h->client, timeout, &arm_shutdown_callback,
+ arm_shutdown_ctx);
+ h->client = NULL;
+ return;
+ }
+ change_service (h, service_name, timeout, cb, cb_cls,
+ GNUNET_MESSAGE_TYPE_ARM_STOP);
}
/**
- * Function to call for each service.
- *
- * @param h handle to ARM
- * @param service_name name of the service
- * @param timeout how long to wait before failing for good
- * @param cb callback to invoke when service is ready
- * @param cb_cls closure for callback
- */
-typedef void (*ServiceOperation) (struct GNUNET_ARM_Handle *h,
- const char *service_name,
- struct GNUNET_TIME_Relative timeout,
- GNUNET_ARM_Callback cb, void *cb_cls);
-
-
-/**
- * Context for starting or stopping multiple services.
+ * Internal state for a list request with ARM.
*/
-struct MultiContext
+struct ListRequestContext
{
+
/**
- * NULL-terminated array of services to start or stop.
+ * Pointer to our handle with ARM.
*/
- char **services;
+ struct GNUNET_ARM_Handle *h;
/**
- * Our handle to ARM.
+ * Function to call with a status code for the requested operation.
*/
- struct GNUNET_ARM_Handle *h;
+ GNUNET_ARM_List_Callback callback;
/**
- * Identifies the operation (start or stop).
+ * Closure for "callback".
*/
- ServiceOperation op;
+ void *cls;
/**
- * Current position in "services".
+ * Timeout for the operation.
*/
- unsigned int pos;
+ struct GNUNET_TIME_Absolute timeout;
};
/**
- * Run the operation for the next service in the multi-service
- * request.
+ * Process a response from ARM for the list request.
*
- * @param cls the "struct MultiContext" that is being processed
- * @param success status of the previous operation (ignored)
+ * @param cls the list request context
+ * @param msg the response
*/
static void
-next_operation (void *cls,
- int success)
+handle_list_response (void *cls, const struct GNUNET_MessageHeader *msg)
{
- struct MultiContext *mc = cls;
- char *pos;
+ struct ListRequestContext *sc = cls;
+ const struct GNUNET_ARM_ListResultMessage *res;
+ const char *pos;
+ uint16_t size_check;
+ uint16_t rcount;
+ uint16_t msize;
- if (NULL == (pos = mc->services[mc->pos]))
+ if (NULL == msg)
+ {
+ GNUNET_break (0);
+ GNUNET_CLIENT_disconnect (sc->h->client);
+ sc->h->client = GNUNET_CLIENT_connect ("arm", sc->h->cfg);
+ GNUNET_assert (NULL != sc->h->client);
+ if (sc->callback != NULL)
+ sc->callback (sc->cls, GNUNET_ARM_PROCESS_COMMUNICATION_ERROR, 0, NULL);
+ GNUNET_free (sc);
+ return;
+ }
+
+ if (NULL == sc->callback)
+ {
+ GNUNET_break (0);
+ GNUNET_free (sc);
+ return;
+ }
+ msize = ntohs (msg->size);
+ if ( (msize < sizeof ( struct GNUNET_ARM_ListResultMessage)) ||
+ (ntohs (msg->type) != GNUNET_MESSAGE_TYPE_ARM_LIST_RESULT) )
+ {
+ GNUNET_break (0);
+ sc->callback (sc->cls, GNUNET_NO, 0, NULL);
+ GNUNET_free (sc);
+ return;
+ }
+ size_check = 0;
+ res = (const struct GNUNET_ARM_ListResultMessage *) msg;
+ rcount = ntohs (res->count);
+ {
+ const char *list[rcount];
+ unsigned int i;
+
+ pos = (const char *)&res[1];
+ for (i=0; i<rcount; i++)
{
- GNUNET_free (mc->services);
- GNUNET_ARM_disconnect (mc->h);
- GNUNET_free (mc);
- return;
+ const char *end = memchr (pos, 0, msize - size_check);
+ if (NULL == end)
+ {
+ GNUNET_break (0);
+ sc->callback (sc->cls, GNUNET_NO, 0, NULL);
+ GNUNET_free (sc);
+ return;
+ }
+ list[i] = pos;
+ size_check += (end - pos) + 1;
+ pos = end + 1;
}
- mc->pos++;
- mc->op (mc->h, pos, MULTI_TIMEOUT, &next_operation, mc);
- GNUNET_free (pos);
+ sc->callback (sc->cls, GNUNET_YES, rcount, list);
+ }
+ GNUNET_free (sc);
}
/**
- * Run a multi-service request.
- *
- * @param cfg configuration to use (needed to contact ARM;
- * the ARM service may internally use a different
- * configuration to determine how to start the service).
- * @param sched scheduler to use
- * @param op the operation to perform for each service
- * @param va NULL-terminated list of services
+ * List all running services.
+ *
+ * @param h handle to ARM
+ * @param timeout how long to wait before failing for good
+ * @param cb callback to invoke when service is ready
+ * @param cb_cls closure for callback
*/
-static void
-run_multi_request (const struct GNUNET_CONFIGURATION_Handle *cfg,
- struct GNUNET_SCHEDULER_Handle *sched,
- ServiceOperation op,
- va_list va)
+void
+GNUNET_ARM_list_running_services (struct GNUNET_ARM_Handle *h,
+ struct GNUNET_TIME_Relative timeout,
+ GNUNET_ARM_List_Callback cb, void *cb_cls)
{
- va_list cp;
- unsigned int total;
- struct MultiContext *mc;
- struct GNUNET_ARM_Handle *h;
- const char *c;
+ struct ListRequestContext *sctx;
+ struct GNUNET_MessageHeader msg;
+ struct GNUNET_CLIENT_Connection *client;
- h = GNUNET_ARM_connect (cfg, sched, NULL);
- if (NULL == h)
+ if (h->client == NULL)
+ {
+ client = GNUNET_CLIENT_connect ("arm", h->cfg);
+ if (client == NULL)
{
- GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
- _("Error while trying to transmit to ARM service\n"));
- return;
+ GNUNET_break (0);
+ cb (cb_cls, GNUNET_ARM_PROCESS_COMMUNICATION_ERROR, 0, NULL);
+ return;
}
- total = 1;
- va_copy (cp, va);
- while (NULL != (va_arg (cp, const char*))) total++;
- va_end (cp);
- mc = GNUNET_malloc (sizeof(struct MultiContext));
- mc->services = GNUNET_malloc (total * sizeof (char*));
- mc->h = h;
- mc->op = op;
- total = 0;
- va_copy (cp, va);
- while (NULL != (c = va_arg (cp, const char*)))
- mc->services[total++] = GNUNET_strdup (c);
- va_end (cp);
- next_operation (mc, GNUNET_YES);
-}
-
-
-/**
- * Start multiple services in the specified order. Convenience
- * function. Works asynchronously, failures are not reported.
- *
- * @param cfg configuration to use (needed to contact ARM;
- * the ARM service may internally use a different
- * configuration to determine how to start the service).
- * @param sched scheduler to use
- * @param ... NULL-terminated list of service names (const char*)
- */
-void
-GNUNET_ARM_start_services (const struct GNUNET_CONFIGURATION_Handle *cfg,
- struct GNUNET_SCHEDULER_Handle *sched,
- ...)
-{
- va_list ap;
-
- va_start (ap, sched);
- run_multi_request (cfg, sched, &GNUNET_ARM_start_service, ap);
- va_end (ap);
-}
-
-
-/**
- * Stop multiple services in the specified order. Convenience
- * function. Works asynchronously, failures are not reported.
- *
- * @param cfg configuration to use (needed to contact ARM;
- * the ARM service may internally use a different
- * configuration to determine how to start the service).
- * @param sched scheduler to use
- * @param ... NULL-terminated list of service names (const char*)
- */
-void
-GNUNET_ARM_stop_services (const struct GNUNET_CONFIGURATION_Handle *cfg,
- struct GNUNET_SCHEDULER_Handle *sched,
- ...)
-{
- va_list ap;
-
- va_start (ap, sched);
- run_multi_request (cfg, sched, &GNUNET_ARM_stop_service, ap);
- va_end (ap);
+ h->client = client;
+ }
+
+ sctx = GNUNET_malloc (sizeof (struct RequestContext));
+ sctx->h = h;
+ sctx->callback = cb;
+ sctx->cls = cb_cls;
+ sctx->timeout = GNUNET_TIME_relative_to_absolute (timeout);
+ msg.size = htons (sizeof (struct GNUNET_MessageHeader));
+ msg.type = htons (GNUNET_MESSAGE_TYPE_ARM_LIST);
+
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Requesting LIST from ARM service with timeout: %s\n",
+ GNUNET_STRINGS_relative_time_to_string (timeout, GNUNET_YES));
+
+ if (GNUNET_OK !=
+ GNUNET_CLIENT_transmit_and_get_response (sctx->h->client,
+ &msg,
+ GNUNET_TIME_absolute_get_remaining
+ (sctx->timeout),
+ GNUNET_YES,
+ &handle_list_response,
+ sctx))
+ {
+ GNUNET_break (0);
+ if (cb != NULL)
+ cb (cb_cls, GNUNET_SYSERR, 0, NULL);
+ GNUNET_free (sctx);
+ return;
+ }
}
-
/* end of arm_api.c */
projects / oweals / gnunet.git / blobdiff