#include "gnunet_util_lib.h"
#include "gnunet_constants.h"
#include "gnunet_protocols.h"
+#include "gnunet_mq_lib.h"
#include "gnunet_identity_provider_service.h"
#include "identity_provider.h"
*/
GNUNET_IDENTITY_PROVIDER_IssueCallback iss_cb;
+ /**
+ * Envelope with the message for this queue entry.
+ */
+ struct GNUNET_MQ_Envelope *env;
+
+ /**
+ * request id
+ */
+ uint32_t r_id;
+
/**
* Closure for @e cont or @e cb.
*/
/**
* Time for next connect retry.
*/
- struct GNUNET_TIME_Relative reconnect_delay;
+ struct GNUNET_TIME_Relative reconnect_backoff;
+
+ /**
+ * Connection to service (if available).
+ */
+ struct GNUNET_MQ_Handle *mq;
+
+ /**
+ * Request Id generator. Incremented by one for each request.
+ */
+ uint32_t r_id_gen;
/**
* Are we polling for incoming messages right now?
* @param cls handle to the service.
*/
static void
-reconnect (void *cls);
-
+reconnect (struct GNUNET_IDENTITY_PROVIDER_Handle *handle);
/**
- * Reschedule a connect attempt to the service.
+ * Reconnect
*
- * @param h transport service to reconnect
+ * @param cls the handle
*/
static void
-reschedule_connect (struct GNUNET_IDENTITY_PROVIDER_Handle *h)
+reconnect_task (void *cls)
{
- GNUNET_assert (h->reconnect_task == NULL);
+ struct GNUNET_IDENTITY_PROVIDER_Handle *handle = cls;
- 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;
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "Scheduling task to reconnect to identity provider service in %s.\n",
- GNUNET_STRINGS_relative_time_to_string (h->reconnect_delay, GNUNET_YES));
- h->reconnect_task =
- GNUNET_SCHEDULER_add_delayed (h->reconnect_delay, &reconnect, h);
- h->reconnect_delay = GNUNET_TIME_STD_BACKOFF (h->reconnect_delay);
+ handle->reconnect_task = NULL;
+ reconnect (handle);
}
/**
- * Type of a function to call when we receive a message
- * from the service.
+ * Disconnect from service and then reconnect.
*
- * @param cls closure
- * @param msg message received, NULL on timeout or fatal error
+ * @param handle our handle
*/
static void
-message_handler (void *cls,
- const struct GNUNET_MessageHeader *msg)
+force_reconnect (struct GNUNET_IDENTITY_PROVIDER_Handle *handle)
{
- struct GNUNET_IDENTITY_PROVIDER_Handle *h = cls;
- struct GNUNET_IDENTITY_PROVIDER_Operation *op;
- struct GNUNET_IDENTITY_PROVIDER_Token token;
- struct GNUNET_IDENTITY_PROVIDER_Ticket ticket;
- const struct GNUNET_IDENTITY_PROVIDER_IssueResultMessage *irm;
- const struct GNUNET_IDENTITY_PROVIDER_ExchangeResultMessage *erm;
- char *str;
- char *ticket_str;
- char *token_str;
- char *label_str;
- uint16_t size;
- uint64_t ticket_nonce;
-
- if (NULL == msg)
- {
- reschedule_connect (h);
- return;
- }
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "Received message of type %d from identity provider service\n",
- ntohs (msg->type));
- size = ntohs (msg->size);
- switch (ntohs (msg->type))
- {
- case GNUNET_MESSAGE_TYPE_IDENTITY_PROVIDER_ISSUE_RESULT:
- if (size < sizeof (struct GNUNET_IDENTITY_PROVIDER_IssueResultMessage))
- {
- GNUNET_break (0);
- reschedule_connect (h);
- return;
- }
- irm = (const struct GNUNET_IDENTITY_PROVIDER_IssueResultMessage *) msg;
- str = GNUNET_strdup ((char *) &irm[1]);
- if ( (size > sizeof (struct GNUNET_IDENTITY_PROVIDER_IssueResultMessage)) &&
- ('\0' != str[size - sizeof (struct GNUNET_IDENTITY_PROVIDER_IssueResultMessage) - 1]) )
- {
- GNUNET_free (str);
- GNUNET_break (0);
- reschedule_connect (h);
- return;
- }
- if (size == sizeof (struct GNUNET_IDENTITY_PROVIDER_IssueResultMessage))
- {
- GNUNET_free (str);
- str = NULL;
- }
- label_str = strtok (str, ",");
-
- if (NULL == label_str)
- {
- GNUNET_free (str);
- GNUNET_break (0);
- reschedule_connect (h);
- return;
- }
- ticket_str = strtok (NULL, ",");
- if (NULL == ticket_str)
- {
- GNUNET_free (str);
- GNUNET_break (0);
- reschedule_connect (h);
- return;
- }
- token_str = strtok (NULL, ",");
- if (NULL == token_str)
- {
- GNUNET_free (str);
- GNUNET_break (0);
- reschedule_connect (h);
- return;
- }
- op = h->op_head;
- GNUNET_CONTAINER_DLL_remove (h->op_head,
- h->op_tail,
- op);
- GNUNET_CLIENT_receive (h->client, &message_handler, h,
- GNUNET_TIME_UNIT_FOREVER_REL);
- ticket.data = ticket_str;
- token.data = token_str;
- if (NULL != op->iss_cb)
- op->iss_cb (op->cls, label_str, &ticket, &token);
- GNUNET_free (str);
- GNUNET_free (op);
- break;
- case GNUNET_MESSAGE_TYPE_IDENTITY_PROVIDER_EXCHANGE_RESULT:
- if (size < sizeof (struct GNUNET_IDENTITY_PROVIDER_ExchangeResultMessage))
- {
- GNUNET_break (0);
- reschedule_connect (h);
- return;
- }
- erm = (const struct GNUNET_IDENTITY_PROVIDER_ExchangeResultMessage *) msg;
- str = (char *) &erm[1];
- if ( (size > sizeof (struct GNUNET_IDENTITY_PROVIDER_ExchangeResultMessage)) &&
- ('\0' != str[size - sizeof (struct GNUNET_IDENTITY_PROVIDER_ExchangeResultMessage) - 1]) )
- {
- GNUNET_break (0);
- reschedule_connect (h);
- return;
- }
- if (size == sizeof (struct GNUNET_IDENTITY_PROVIDER_ExchangeResultMessage))
- str = NULL;
-
- op = h->op_head;
- GNUNET_CONTAINER_DLL_remove (h->op_head,
- h->op_tail,
- op);
- GNUNET_CLIENT_receive (h->client, &message_handler, h,
- GNUNET_TIME_UNIT_FOREVER_REL);
- token.data = str;
- ticket_nonce = ntohl (erm->ticket_nonce);
- if (NULL != op->ex_cb)
- op->ex_cb (op->cls, &token, ticket_nonce);
- GNUNET_free (op);
- break;
-
- default:
- GNUNET_break (0);
- reschedule_connect (h);
- return;
- }
+ GNUNET_MQ_destroy (handle->mq);
+ handle->mq = NULL;
+ handle->reconnect_backoff
+ = GNUNET_TIME_STD_BACKOFF (handle->reconnect_backoff);
+ handle->reconnect_task
+ = GNUNET_SCHEDULER_add_delayed (handle->reconnect_backoff,
+ &reconnect_task,
+ handle);
}
-
/**
- * Schedule transmission of the next message from our queue.
+ * Generic error handler, called with the appropriate error code and
+ * the same closure specified at the creation of the message queue.
+ * Not every message queue implementation supports an error handler.
*
- * @param h identity handle
+ * @param cls closure with the `struct GNUNET_GNS_Handle *`
+ * @param error error code
*/
static void
-transmit_next (struct GNUNET_IDENTITY_PROVIDER_Handle *h);
-
+mq_error_handler (void *cls,
+ enum GNUNET_MQ_Error error)
+{
+ struct GNUNET_IDENTITY_PROVIDER_Handle *handle = cls;
+ force_reconnect (handle);
+}
/**
- * Transmit next message to service.
+ * Check validity of message received from the service
*
- * @param cls the `struct GNUNET_IDENTITY_PROVIDER_Handle`.
- * @param size number of bytes available in @a buf
- * @param buf where to copy the message
- * @return number of bytes copied to buf
+ * @param cls the `struct GNUNET_IDENTITY_PROVIDER_Handle *`
+ * @param result_msg the incoming message
*/
-static size_t
-send_next_message (void *cls,
- size_t size,
- void *buf)
+static int
+check_exchange_result (void *cls,
+ const struct GNUNET_IDENTITY_PROVIDER_ExchangeResultMessage *erm)
{
- struct GNUNET_IDENTITY_PROVIDER_Handle *h = cls;
- struct GNUNET_IDENTITY_PROVIDER_Operation *op = h->op_head;
- size_t ret;
+ char *str;
+ size_t size = ntohs (erm->header.size) - sizeof (*erm);
+
- h->th = NULL;
- if (NULL == op)
- return 0;
- ret = ntohs (op->msg->size);
- if (ret > size)
- {
- reschedule_connect (h);
- return 0;
- }
- LOG (GNUNET_ERROR_TYPE_DEBUG,
- "Sending message of type %d to identity provider service\n",
- ntohs (op->msg->type));
- GNUNET_memcpy (buf, op->msg, ret);
- if ( (NULL == op->iss_cb) &&
- (NULL == op->ex_cb) )
+ str = (char *) &erm[1];
+ if ( (size > sizeof (struct GNUNET_IDENTITY_PROVIDER_ExchangeResultMessage)) &&
+ ('\0' != str[size - sizeof (struct GNUNET_IDENTITY_PROVIDER_ExchangeResultMessage) - 1]) )
{
- GNUNET_CONTAINER_DLL_remove (h->op_head,
- h->op_tail,
- op);
- GNUNET_free (op);
- transmit_next (h);
+ GNUNET_break (0);
+ return GNUNET_SYSERR;
}
- if (GNUNET_NO == h->in_receive)
+ return GNUNET_OK;
+}
+
+
+/**
+ * Check validity of message received from the service
+ *
+ * @param cls the `struct GNUNET_IDENTITY_PROVIDER_Handle *`
+ * @param result_msg the incoming message
+ */
+static int
+check_result (void *cls,
+ const struct GNUNET_IDENTITY_PROVIDER_IssueResultMessage *irm)
+{
+ char *str;
+ size_t size = ntohs (irm->header.size) - sizeof (*irm);
+ str = (char*) &irm[1];
+ if ( (size > sizeof (struct GNUNET_IDENTITY_PROVIDER_IssueResultMessage)) &&
+ ('\0' != str[size - sizeof (struct GNUNET_IDENTITY_PROVIDER_IssueResultMessage) - 1]) )
{
- h->in_receive = GNUNET_YES;
- GNUNET_CLIENT_receive (h->client,
- &message_handler, h,
- GNUNET_TIME_UNIT_FOREVER_REL);
+ GNUNET_break (0);
+ return GNUNET_SYSERR;
}
- return ret;
+ return GNUNET_OK;
}
+/**
+ * Handler for messages received from the GNS service
+ *
+ * @param cls the `struct GNUNET_GNS_Handle *`
+ * @param loookup_msg the incoming message
+ */
+static void
+handle_exchange_result (void *cls,
+ const struct GNUNET_IDENTITY_PROVIDER_ExchangeResultMessage *erm)
+{
+ struct GNUNET_IDENTITY_PROVIDER_Handle *handle = cls;
+ struct GNUNET_IDENTITY_PROVIDER_Operation *op;
+ struct GNUNET_IDENTITY_PROVIDER_Token token;
+ uint64_t ticket_nonce;
+ uint32_t r_id = ntohl (erm->id);
+ char *str;
+
+ for (op = handle->op_head; NULL != op; op = op->next)
+ if (op->r_id == r_id)
+ break;
+ if (NULL == op)
+ return;
+ str = GNUNET_strdup ((char*)&erm[1]);
+ op = handle->op_head;
+ GNUNET_CONTAINER_DLL_remove (handle->op_head,
+ handle->op_tail,
+ op);
+ token.data = str;
+ ticket_nonce = ntohl (erm->ticket_nonce);
+ if (NULL != op->ex_cb)
+ op->ex_cb (op->cls, &token, ticket_nonce);
+ GNUNET_free (str);
+ GNUNET_free (op);
+
+}
/**
- * Schedule transmission of the next message from our queue.
+ * Handler for messages received from the GNS service
*
- * @param h identity provider handle
+ * @param cls the `struct GNUNET_GNS_Handle *`
+ * @param loookup_msg the incoming message
*/
static void
-transmit_next (struct GNUNET_IDENTITY_PROVIDER_Handle *h)
+handle_result (void *cls,
+ const struct GNUNET_IDENTITY_PROVIDER_IssueResultMessage *irm)
{
- struct GNUNET_IDENTITY_PROVIDER_Operation *op = h->op_head;
+ struct GNUNET_IDENTITY_PROVIDER_Handle *handle = cls;
+ struct GNUNET_IDENTITY_PROVIDER_Operation *op;
+ struct GNUNET_IDENTITY_PROVIDER_Token token;
+ struct GNUNET_IDENTITY_PROVIDER_Ticket ticket;
+ uint32_t r_id = ntohl (irm->id);
+ char *str;
+ char *label_str;
+ char *ticket_str;
+ char *token_str;
- GNUNET_assert (NULL == h->th);
+ for (op = handle->op_head; NULL != op; op = op->next)
+ if (op->r_id == r_id)
+ break;
if (NULL == op)
return;
- if (NULL == h->client)
+ str = GNUNET_strdup ((char*)&irm[1]);
+ label_str = strtok (str, ",");
+
+ if (NULL == label_str)
+ {
+ GNUNET_free (str);
+ GNUNET_break (0);
return;
- h->th = GNUNET_CLIENT_notify_transmit_ready (h->client,
- ntohs (op->msg->size),
- GNUNET_TIME_UNIT_FOREVER_REL,
- GNUNET_NO,
- &send_next_message,
- h);
-}
+ }
+ ticket_str = strtok (NULL, ",");
+ if (NULL == ticket_str)
+ {
+ GNUNET_free (str);
+ GNUNET_break (0);
+ return;
+ }
+ token_str = strtok (NULL, ",");
+ if (NULL == token_str)
+ {
+ GNUNET_free (str);
+ GNUNET_break (0);
+ return;
+ }
+ GNUNET_CONTAINER_DLL_remove (handle->op_head,
+ handle->op_tail,
+ op);
+ ticket.data = ticket_str;
+ token.data = token_str;
+ if (NULL != op->iss_cb)
+ op->iss_cb (op->cls, label_str, &ticket, &token);
+ GNUNET_free (str);
+ GNUNET_free (op);
+}
/**
* Try again to connect to the service.
* @param cls handle to the identity provider service.
*/
static void
-reconnect (void *cls)
+reconnect (struct GNUNET_IDENTITY_PROVIDER_Handle *h)
{
- struct GNUNET_IDENTITY_PROVIDER_Handle *h = cls;
+ GNUNET_MQ_hd_var_size (result,
+ GNUNET_MESSAGE_TYPE_IDENTITY_PROVIDER_ISSUE_RESULT,
+ struct GNUNET_IDENTITY_PROVIDER_IssueResultMessage);
+ GNUNET_MQ_hd_var_size (exchange_result,
+ GNUNET_MESSAGE_TYPE_IDENTITY_PROVIDER_EXCHANGE_RESULT,
+ struct GNUNET_IDENTITY_PROVIDER_ExchangeResultMessage);
+ struct GNUNET_MQ_MessageHandler handlers[] = {
+ make_result_handler (h),
+ make_exchange_result_handler (h),
+ GNUNET_MQ_handler_end ()
+ };
+ struct GNUNET_IDENTITY_PROVIDER_Operation *op;
- h->reconnect_task = NULL;
+ GNUNET_assert (NULL == h->mq);
LOG (GNUNET_ERROR_TYPE_DEBUG,
"Connecting to identity provider service.\n");
- GNUNET_assert (NULL == h->client);
- h->client = GNUNET_CLIENT_connect ("identity-provider", h->cfg);
- GNUNET_assert (NULL != h->client);
- transmit_next (h);
- GNUNET_assert (NULL != h->th);
+
+ h->mq = GNUNET_CLIENT_connecT (h->cfg,
+ "identity-provider",
+ handlers,
+ &mq_error_handler,
+ h);
+ if (NULL == h->mq)
+ return;
+ for (op = h->op_head; NULL != op; op = op->next)
+ GNUNET_MQ_send_copy (h->mq,
+ op->env);
}
h = GNUNET_new (struct GNUNET_IDENTITY_PROVIDER_Handle);
h->cfg = cfg;
- h->reconnect_delay = GNUNET_TIME_UNIT_ZERO;
- h->reconnect_task = GNUNET_SCHEDULER_add_now (&reconnect, h);
+ reconnect (h);
+ if (NULL == h->mq)
+ {
+ GNUNET_free (h);
+ return NULL;
+ }
return h;
}
*/
struct GNUNET_IDENTITY_PROVIDER_Operation *
GNUNET_IDENTITY_PROVIDER_issue_token (struct GNUNET_IDENTITY_PROVIDER_Handle *id,
- const struct GNUNET_CRYPTO_EcdsaPrivateKey *iss_key,
- const struct GNUNET_CRYPTO_EcdsaPublicKey *aud_key,
- const char* scopes,
- struct GNUNET_TIME_Absolute expiration,
- uint64_t nonce,
- GNUNET_IDENTITY_PROVIDER_IssueCallback cb,
- void *cb_cls)
+ const struct GNUNET_CRYPTO_EcdsaPrivateKey *iss_key,
+ const struct GNUNET_CRYPTO_EcdsaPublicKey *aud_key,
+ const char* scopes,
+ struct GNUNET_TIME_Absolute expiration,
+ uint64_t nonce,
+ GNUNET_IDENTITY_PROVIDER_IssueCallback cb,
+ void *cb_cls)
{
struct GNUNET_IDENTITY_PROVIDER_Operation *op;
struct GNUNET_IDENTITY_PROVIDER_IssueMessage *im;
GNUNET_break (0);
return NULL;
}
- op = GNUNET_malloc (sizeof (struct GNUNET_IDENTITY_PROVIDER_Operation) +
- sizeof (struct GNUNET_IDENTITY_PROVIDER_IssueMessage) +
- slen);
+ op = GNUNET_new (struct GNUNET_IDENTITY_PROVIDER_Operation);
op->h = id;
op->iss_cb = cb;
op->cls = cb_cls;
- im = (struct GNUNET_IDENTITY_PROVIDER_IssueMessage *) &op[1];
- im->header.type = htons (GNUNET_MESSAGE_TYPE_IDENTITY_PROVIDER_ISSUE);
- im->header.size = htons (sizeof (struct GNUNET_IDENTITY_PROVIDER_IssueMessage) +
- slen);
+ op->r_id = id->r_id_gen++;
+ op->env = GNUNET_MQ_msg_extra (im,
+ slen,
+ GNUNET_MESSAGE_TYPE_IDENTITY_PROVIDER_ISSUE);
+ im->id = op->r_id;
im->iss_key = *iss_key;
im->aud_key = *aud_key;
im->nonce = htonl (nonce);
im->expiration = GNUNET_TIME_absolute_hton (expiration);
GNUNET_memcpy (&im[1], scopes, slen);
- op->msg = &im->header;
GNUNET_CONTAINER_DLL_insert_tail (id->op_head,
- id->op_tail,
- op);
- if (NULL == id->th)
- transmit_next (id);
+ id->op_tail,
+ op);
+ if (NULL != id->mq)
+ GNUNET_MQ_send_copy (id->mq,
+ op->env);
return op;
}
GNUNET_break (0);
return NULL;
}
- op = GNUNET_malloc (sizeof (struct GNUNET_IDENTITY_PROVIDER_Operation) +
- sizeof (struct GNUNET_IDENTITY_PROVIDER_ExchangeMessage) +
- slen);
+ op = GNUNET_new (struct GNUNET_IDENTITY_PROVIDER_Operation);
op->h = id;
op->ex_cb = cont;
op->cls = cont_cls;
- em = (struct GNUNET_IDENTITY_PROVIDER_ExchangeMessage *) &op[1];
- em->header.type = htons (GNUNET_MESSAGE_TYPE_IDENTITY_PROVIDER_EXCHANGE);
- em->header.size = htons (sizeof (struct GNUNET_IDENTITY_PROVIDER_ExchangeMessage) +
- slen);
+ op->r_id = id->r_id_gen++;
+ op->env = GNUNET_MQ_msg_extra (em,
+ slen,
+ GNUNET_MESSAGE_TYPE_IDENTITY_PROVIDER_EXCHANGE);
em->aud_privkey = *aud_privkey;
+ em->id = htonl (op->r_id);
GNUNET_memcpy (&em[1], ticket_str, slen);
GNUNET_free (ticket_str);
- op->msg = &em->header;
GNUNET_CONTAINER_DLL_insert_tail (id->op_head,
id->op_tail,
op);
- if (NULL == id->th)
- transmit_next (id);
+ if (NULL != id->mq)
+ GNUNET_MQ_send_copy (id->mq,
+ op->env);
return op;
}
{
struct GNUNET_IDENTITY_PROVIDER_Handle *h = op->h;
- if ( (h->op_head != op) ||
- (NULL == h->client) )
- {
- /* request not active, can simply remove */
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Client aborted non-head operation, simply removing it\n");
- GNUNET_CONTAINER_DLL_remove (h->op_head,
- h->op_tail,
- op);
- GNUNET_free (op);
- return;
- }
- if (NULL != h->th)
- {
- /* request active but not yet with service, can still abort */
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Client aborted head operation prior to transmission, aborting it\n");
- GNUNET_CLIENT_notify_transmit_ready_cancel (h->th);
- h->th = NULL;
- GNUNET_CONTAINER_DLL_remove (h->op_head,
- h->op_tail,
- op);
- GNUNET_free (op);
- transmit_next (h);
- return;
- }
- /* request active with service, simply ensure continuations are not called */
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "Client aborted active request, NULLing continuation\n");
- op->ex_cb = NULL;
- op->iss_cb = NULL;
+ GNUNET_CONTAINER_DLL_remove (h->op_head,
+ h->op_tail,
+ op);
+ GNUNET_MQ_discard (op->env);
+ GNUNET_free (op);
}
void
GNUNET_IDENTITY_PROVIDER_disconnect (struct GNUNET_IDENTITY_PROVIDER_Handle *h)
{
- struct GNUNET_IDENTITY_PROVIDER_Operation *op;
-
GNUNET_assert (NULL != h);
- if (h->reconnect_task != NULL)
- {
- GNUNET_SCHEDULER_cancel (h->reconnect_task);
- h->reconnect_task = NULL;
- }
- if (NULL != h->th)
+ if (NULL != h->mq)
{
- GNUNET_CLIENT_notify_transmit_ready_cancel (h->th);
- h->th = NULL;
+ GNUNET_MQ_destroy (h->mq);
+ h->mq = NULL;
}
- while (NULL != (op = h->op_head))
+ if (NULL != h->reconnect_task)
{
- GNUNET_CONTAINER_DLL_remove (h->op_head,
- h->op_tail,
- op);
- GNUNET_free (op);
- }
- if (NULL != h->client)
- {
- GNUNET_CLIENT_disconnect (h->client);
- h->client = NULL;
+ GNUNET_SCHEDULER_cancel (h->reconnect_task);
+ h->reconnect_task = NULL;
}
+ GNUNET_assert (NULL == h->op_head);
GNUNET_free (h);
}
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