/*
This file is part of GNUnet.
- (C) 2013 Christian Grothoff (and other contributing authors)
+ Copyright (C) 2013 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 Liceidentity as published
/**
* @file identity/identity_api.c
- * @brief api to get information from the network size estimation service
- * @author Nathan Evans
+ * @brief api to interact with the identity service
+ * @author Christian Grothoff
*/
#include "platform.h"
-#include "gnunet_client_lib.h"
+#include "gnunet_util_lib.h"
#include "gnunet_constants.h"
-#include "gnunet_container_lib.h"
-#include "gnunet_arm_service.h"
-#include "gnunet_hello_lib.h"
#include "gnunet_protocols.h"
-#include "gnunet_server_lib.h"
-#include "gnunet_time_lib.h"
#include "gnunet_identity_service.h"
#include "identity.h"
#define LOG(kind,...) GNUNET_log_from (kind, "identity-api",__VA_ARGS__)
+/**
+ * Handle for an ego.
+ */
+struct GNUNET_IDENTITY_Ego
+{
+ /**
+ * Private key associated with this ego.
+ */
+ struct GNUNET_CRYPTO_EcdsaPrivateKey *pk;
+
+ /**
+ * Current name associated with this ego.
+ */
+ char *name;
+
+ /**
+ * Client context associated with this ego.
+ */
+ void *ctx;
+
+ /**
+ * Hash of the public key of this ego.
+ */
+ struct GNUNET_HashCode id;
+};
+
+
+/**
+ * Handle for an operation with the identity service.
+ */
+struct GNUNET_IDENTITY_Operation
+{
+
+ /**
+ * Main identity handle.
+ */
+ struct GNUNET_IDENTITY_Handle *h;
+
+ /**
+ * We keep operations in a DLL.
+ */
+ struct GNUNET_IDENTITY_Operation *next;
+
+ /**
+ * We keep operations in a DLL.
+ */
+ struct GNUNET_IDENTITY_Operation *prev;
+
+ /**
+ * Message to send to the identity service.
+ * Allocated at the end of this struct.
+ */
+ const struct GNUNET_MessageHeader *msg;
+
+ /**
+ * Continuation to invoke with the result of the transmission; @e cb
+ * will be NULL in this case.
+ */
+ GNUNET_IDENTITY_Continuation cont;
+
+ /**
+ * Continuation to invoke with the result of the transmission for
+ * 'get' operations (@e cont will be NULL in this case).
+ */
+ GNUNET_IDENTITY_Callback cb;
+
+ /**
+ * Closure for @e cont or @e cb.
+ */
+ void *cls;
+
+};
+
+
/**
* Handle for the service.
*/
struct GNUNET_CLIENT_Connection *client;
/**
- * Currently pending transmission request.
+ * Hash map from the hash of the public key to the
+ * respective 'GNUNET_IDENTITY_Ego' handle.
+ */
+ struct GNUNET_CONTAINER_MultiHashMap *egos;
+
+ /**
+ * Function to call when we receive updates.
+ */
+ GNUNET_IDENTITY_Callback cb;
+
+ /**
+ * Closure for 'cb'.
+ */
+ void *cb_cls;
+
+ /**
+ * Head of active operations.
+ */
+ struct GNUNET_IDENTITY_Operation *op_head;
+
+ /**
+ * Tail of active operations.
+ */
+ struct GNUNET_IDENTITY_Operation *op_tail;
+
+ /**
+ * Currently pending transmission request, or NULL for none.
*/
struct GNUNET_CLIENT_TransmitHandle *th;
/**
* Task doing exponential back-off trying to reconnect.
*/
- GNUNET_SCHEDULER_TaskIdentifier reconnect_task;
+ struct GNUNET_SCHEDULER_Task * reconnect_task;
/**
* Time for next connect retry.
*/
struct GNUNET_TIME_Relative reconnect_delay;
+ /**
+ * Are we polling for incoming messages right now?
+ */
+ int in_receive;
+
};
/**
- * Try again to connect to network size estimation service.
+ * Obtain the ego representing 'anonymous' users.
*
- * @param cls the handle to the transport service
- * @param tc scheduler context
+ * @return handle for the anonymous user, must not be freed
*/
-static void
-reconnect (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc);
+const struct GNUNET_IDENTITY_Ego *
+GNUNET_IDENTITY_ego_get_anonymous ()
+{
+ static struct GNUNET_IDENTITY_Ego anon;
+ struct GNUNET_CRYPTO_EcdsaPublicKey pub;
+
+ if (NULL != anon.pk)
+ return &anon;
+ anon.pk = (struct GNUNET_CRYPTO_EcdsaPrivateKey *) GNUNET_CRYPTO_ecdsa_key_get_anonymous ();
+ GNUNET_CRYPTO_ecdsa_key_get_public (anon.pk,
+ &pub);
+ GNUNET_CRYPTO_hash (&pub, sizeof (pub), &anon.id);
+ return &anon;
+}
/**
- * Type of a function to call when we receive a message
- * from the service.
+ * Try again to connect to the identity service.
*
- * @param cls closure
- * @param msg message received, NULL on timeout or fatal error
+ * @param cls handle to the identity service.
+ * @param tc scheduler context
*/
static void
-message_handler (void *cls, const struct GNUNET_MessageHeader *msg)
-{
- struct GNUNET_IDENTITY_Handle *h = cls;
- const struct GNUNET_IDENTITY_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;
- }
- // FIXME: process...
- GNUNET_CLIENT_receive (h->client, &message_handler, h,
- GNUNET_TIME_UNIT_FOREVER_REL);
-}
-
+reconnect (void *cls,
+ const struct GNUNET_SCHEDULER_TaskContext *tc);
/**
static void
reschedule_connect (struct GNUNET_IDENTITY_Handle *h)
{
- GNUNET_assert (h->reconnect_task == GNUNET_SCHEDULER_NO_TASK);
+ GNUNET_assert (h->reconnect_task == NULL);
if (NULL != h->th)
{
GNUNET_CLIENT_disconnect (h->client);
h->client = NULL;
}
-
+ h->in_receive = GNUNET_NO;
LOG (GNUNET_ERROR_TYPE_DEBUG,
- "Scheduling task to reconnect to identity service in %llu ms.\n",
- h->reconnect_delay.rel_value);
+ "Scheduling task to reconnect to identity 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);
/**
- * Transmit START message to service.
+ * 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
+ */
+static void
+message_handler (void *cls,
+ const struct GNUNET_MessageHeader *msg)
+{
+ struct GNUNET_IDENTITY_Handle *h = cls;
+ struct GNUNET_IDENTITY_Operation *op;
+ struct GNUNET_IDENTITY_Ego *ego;
+ const struct GNUNET_IDENTITY_ResultCodeMessage *rcm;
+ const struct GNUNET_IDENTITY_UpdateMessage *um;
+ const struct GNUNET_IDENTITY_SetDefaultMessage *sdm;
+ struct GNUNET_CRYPTO_EcdsaPublicKey pub;
+ struct GNUNET_HashCode id;
+ const char *str;
+ uint16_t size;
+ uint16_t name_len;
+
+ if (NULL == msg)
+ {
+ reschedule_connect (h);
+ return;
+ }
+ LOG (GNUNET_ERROR_TYPE_DEBUG,
+ "Received message of type %d from identity service\n",
+ ntohs (msg->type));
+ size = ntohs (msg->size);
+ switch (ntohs (msg->type))
+ {
+ case GNUNET_MESSAGE_TYPE_IDENTITY_RESULT_CODE:
+ if (size < sizeof (struct GNUNET_IDENTITY_ResultCodeMessage))
+ {
+ GNUNET_break (0);
+ reschedule_connect (h);
+ return;
+ }
+ rcm = (const struct GNUNET_IDENTITY_ResultCodeMessage *) msg;
+ str = (const char *) &rcm[1];
+ if ( (size > sizeof (struct GNUNET_IDENTITY_ResultCodeMessage)) &&
+ ('\0' != str[size - sizeof (struct GNUNET_IDENTITY_ResultCodeMessage) - 1]) )
+ {
+ GNUNET_break (0);
+ reschedule_connect (h);
+ return;
+ }
+ if (size == sizeof (struct GNUNET_IDENTITY_ResultCodeMessage))
+ 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);
+ if (NULL != op->cont)
+ op->cont (op->cls,
+ str);
+ else if (NULL != op->cb)
+ op->cb (op->cls, NULL, NULL, NULL);
+ GNUNET_free (op);
+ break;
+ case GNUNET_MESSAGE_TYPE_IDENTITY_UPDATE:
+ if (size < sizeof (struct GNUNET_IDENTITY_UpdateMessage))
+ {
+ GNUNET_break (0);
+ reschedule_connect (h);
+ return;
+ }
+ um = (const struct GNUNET_IDENTITY_UpdateMessage *) msg;
+ name_len = ntohs (um->name_len);
+
+ str = (const char *) &um[1];
+ if ( (size != name_len + sizeof (struct GNUNET_IDENTITY_UpdateMessage)) ||
+ ( (0 != name_len) &&
+ ('\0' != str[name_len - 1])) )
+ {
+ GNUNET_break (0);
+ reschedule_connect (h);
+ return;
+ }
+ if (GNUNET_YES == ntohs (um->end_of_list))
+ {
+ /* end of initial list of data */
+ GNUNET_CLIENT_receive (h->client, &message_handler, h,
+ GNUNET_TIME_UNIT_FOREVER_REL);
+ if (NULL != h->cb)
+ h->cb (h->cb_cls, NULL, NULL, NULL);
+ break;
+ }
+ GNUNET_CRYPTO_ecdsa_key_get_public (&um->private_key,
+ &pub);
+ GNUNET_CRYPTO_hash (&pub, sizeof (pub), &id);
+ if (0 == name_len)
+ str = NULL;
+ else
+ str = (const char *) &um[1];
+ ego = GNUNET_CONTAINER_multihashmap_get (h->egos,
+ &id);
+ if (NULL == ego)
+ {
+ /* ego was created */
+ if (NULL == str)
+ {
+ /* deletion of unknown ego? not allowed */
+ GNUNET_break (0);
+ reschedule_connect (h);
+ return;
+ }
+ ego = GNUNET_new (struct GNUNET_IDENTITY_Ego);
+ ego->pk = GNUNET_new (struct GNUNET_CRYPTO_EcdsaPrivateKey);
+ *ego->pk = um->private_key;
+ ego->name = GNUNET_strdup (str);
+ ego->id = id;
+ GNUNET_assert (GNUNET_YES ==
+ GNUNET_CONTAINER_multihashmap_put (h->egos,
+ &ego->id,
+ ego,
+ GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY));
+ }
+ if (NULL == str)
+ {
+ /* ego was deleted */
+ GNUNET_assert (GNUNET_YES ==
+ GNUNET_CONTAINER_multihashmap_remove (h->egos,
+ &ego->id,
+ ego));
+ }
+ else
+ {
+ /* ego changed name */
+ GNUNET_free (ego->name);
+ ego->name = GNUNET_strdup (str);
+ }
+ GNUNET_CLIENT_receive (h->client, &message_handler, h,
+ GNUNET_TIME_UNIT_FOREVER_REL);
+ /* inform application about change */
+ if (NULL != h->cb)
+ h->cb (h->cb_cls,
+ ego,
+ &ego->ctx,
+ str);
+ if (NULL == str)
+ {
+ GNUNET_free (ego->pk);
+ GNUNET_free (ego->name);
+ GNUNET_free (ego);
+ }
+ break;
+ case GNUNET_MESSAGE_TYPE_IDENTITY_SET_DEFAULT:
+ if (size < sizeof (struct GNUNET_IDENTITY_SetDefaultMessage))
+ {
+ GNUNET_break (0);
+ reschedule_connect (h);
+ return;
+ }
+ sdm = (const struct GNUNET_IDENTITY_SetDefaultMessage *) msg;
+ GNUNET_break (0 == ntohs (sdm->reserved));
+ name_len = ntohs (sdm->name_len);
+ str = (const char *) &sdm[1];
+ if ( (size != name_len + sizeof (struct GNUNET_IDENTITY_SetDefaultMessage)) ||
+ ( (0 != name_len) &&
+ ('\0' != str[name_len - 1]) ) )
+ {
+ GNUNET_break (0);
+ reschedule_connect (h);
+ return;
+ }
+ /* Note: we know which service this should be for, so we're not
+ really using 'str' henceforth */
+ GNUNET_CRYPTO_ecdsa_key_get_public (&sdm->private_key,
+ &pub);
+ GNUNET_CRYPTO_hash (&pub, sizeof (pub), &id);
+ ego = GNUNET_CONTAINER_multihashmap_get (h->egos,
+ &id);
+ if (NULL == ego)
+ {
+ GNUNET_break (0);
+ reschedule_connect (h);
+ return;
+ }
+ op = h->op_head;
+ if (NULL == op)
+ {
+ GNUNET_break (0);
+ reschedule_connect (h);
+ return;
+ }
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Received SET_DEFAULT message from identity service\n");
+ GNUNET_CONTAINER_DLL_remove (h->op_head,
+ h->op_tail,
+ op);
+ GNUNET_CLIENT_receive (h->client, &message_handler, h,
+ GNUNET_TIME_UNIT_FOREVER_REL);
+ if (NULL != op->cb)
+ op->cb (op->cls,
+ ego,
+ &ego->ctx,
+ ego->name);
+ GNUNET_free (op);
+ break;
+ default:
+ GNUNET_break (0);
+ reschedule_connect (h);
+ return;
+ }
+}
+
+
+/**
+ * Schedule transmission of the next message from our queue.
*
- * @param cls unused
- * @param size number of bytes available in buf
+ * @param h identity handle
+ */
+static void
+transmit_next (struct GNUNET_IDENTITY_Handle *h);
+
+
+/**
+ * Transmit next message to service.
+ *
+ * @param cls the `struct GNUNET_IDENTITY_Handle`.
+ * @param size number of bytes available in @a buf
* @param buf where to copy the message
* @return number of bytes copied to buf
*/
static size_t
-send_start (void *cls, size_t size, void *buf)
+send_next_message (void *cls,
+ size_t size,
+ void *buf)
{
- return sizeof (struct GNUNET_MessageHeader);
+ struct GNUNET_IDENTITY_Handle *h = cls;
+ struct GNUNET_IDENTITY_Operation *op = h->op_head;
+ size_t ret;
+
+ 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 service\n",
+ ntohs (op->msg->type));
+ memcpy (buf, op->msg, ret);
+ if ( (NULL == op->cont) &&
+ (NULL == op->cb) )
+ {
+ GNUNET_CONTAINER_DLL_remove (h->op_head,
+ h->op_tail,
+ op);
+ GNUNET_free (op);
+ transmit_next (h);
+ }
+ if (GNUNET_NO == h->in_receive)
+ {
+ h->in_receive = GNUNET_YES;
+ GNUNET_CLIENT_receive (h->client,
+ &message_handler, h,
+ GNUNET_TIME_UNIT_FOREVER_REL);
+ }
+ return ret;
}
/**
- * Try again to connect to network size estimation service.
+ * Schedule transmission of the next message from our queue.
*
- * @param cls the handle to the transport service
+ * @param h identity handle
+ */
+static void
+transmit_next (struct GNUNET_IDENTITY_Handle *h)
+{
+ struct GNUNET_IDENTITY_Operation *op = h->op_head;
+
+ GNUNET_assert (NULL == h->th);
+ if (NULL == op)
+ return;
+ if (NULL == h->client)
+ 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);
+}
+
+
+/**
+ * Try again to connect to the identity service.
+ *
+ * @param cls handle to the identity service.
* @param tc scheduler context
*/
static void
reconnect (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
{
struct GNUNET_IDENTITY_Handle *h = cls;
+ struct GNUNET_IDENTITY_Operation *op;
+ struct GNUNET_MessageHeader msg;
- h->reconnect_task = GNUNET_SCHEDULER_NO_TASK;
- if ((tc->reason & GNUNET_SCHEDULER_REASON_SHUTDOWN) != 0)
- {
- /* shutdown, just give up */
- return;
- }
+ h->reconnect_task = NULL;
LOG (GNUNET_ERROR_TYPE_DEBUG,
- "Connecting to network size estimation service.\n");
- GNUNET_assert (h->client == NULL);
+ "Connecting to identity service.\n");
+ GNUNET_assert (NULL == h->client);
h->client = GNUNET_CLIENT_connect ("identity", h->cfg);
- GNUNET_assert (h->client != NULL);
-
- 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_assert (NULL != h->client);
+ if ( (NULL == h->op_head) ||
+ (GNUNET_MESSAGE_TYPE_IDENTITY_START != ntohs (h->op_head->msg->type)) )
+ {
+ op = GNUNET_malloc (sizeof (struct GNUNET_IDENTITY_Operation) +
+ sizeof (struct GNUNET_MessageHeader));
+ op->h = h;
+ op->msg = (const struct GNUNET_MessageHeader *) &op[1];
+ msg.size = htons (sizeof (msg));
+ msg.type = htons (GNUNET_MESSAGE_TYPE_IDENTITY_START);
+ memcpy (&op[1], &msg, sizeof (msg));
+ GNUNET_CONTAINER_DLL_insert (h->op_head,
+ h->op_tail,
+ op);
+ }
+ transmit_next (h);
+ GNUNET_assert (NULL != h->th);
}
*
* @param cfg the configuration to use
* @param cb function to call on all identity events, can be NULL
- * @param cb_cls closure for 'cb'
+ * @param cb_cls closure for @a cb
* @return handle to use
*/
struct GNUNET_IDENTITY_Handle *
GNUNET_IDENTITY_Callback cb,
void *cb_cls)
{
- struct GNUNET_IDENTITY_Handle *ret;
+ struct GNUNET_IDENTITY_Handle *h;
+
+ h = GNUNET_new (struct GNUNET_IDENTITY_Handle);
+ h->cfg = cfg;
+ h->cb = cb;
+ h->cb_cls = cb_cls;
+ h->egos = GNUNET_CONTAINER_multihashmap_create (16, GNUNET_YES);
+ h->reconnect_delay = GNUNET_TIME_UNIT_ZERO;
+ h->reconnect_task = GNUNET_SCHEDULER_add_now (&reconnect, h);
+ return h;
+}
- ret = GNUNET_malloc (sizeof (struct GNUNET_IDENTITY_Handle));
- ret->cfg = cfg;
- ret->reconnect_delay = GNUNET_TIME_UNIT_ZERO;
- ret->reconnect_task = GNUNET_SCHEDULER_add_now (&reconnect, ret);
- return ret;
+
+/**
+ * Obtain the ECC key associated with a ego.
+ *
+ * @param ego the ego
+ * @return associated ECC key, valid as long as the ego is valid
+ */
+const struct GNUNET_CRYPTO_EcdsaPrivateKey *
+GNUNET_IDENTITY_ego_get_private_key (const struct GNUNET_IDENTITY_Ego *ego)
+{
+ return ego->pk;
+}
+
+
+/**
+ * Get the identifier (public key) of an ego.
+ *
+ * @param ego identity handle with the private key
+ * @param pk set to ego's public key
+ */
+void
+GNUNET_IDENTITY_ego_get_public_key (const struct GNUNET_IDENTITY_Ego *ego,
+ struct GNUNET_CRYPTO_EcdsaPublicKey *pk)
+{
+ GNUNET_CRYPTO_ecdsa_key_get_public (ego->pk,
+ pk);
+}
+
+
+/**
+ * Obtain the identity that is currently preferred/default
+ * for a service.
+ *
+ * @param id identity service to query
+ * @param service_name for which service is an identity wanted
+ * @param cb function to call with the result (will only be called once)
+ * @param cb_cls closure for @a cb
+ * @return handle to abort the operation
+ */
+struct GNUNET_IDENTITY_Operation *
+GNUNET_IDENTITY_get (struct GNUNET_IDENTITY_Handle *id,
+ const char *service_name,
+ GNUNET_IDENTITY_Callback cb,
+ void *cb_cls)
+{
+ struct GNUNET_IDENTITY_Operation *op;
+ struct GNUNET_IDENTITY_GetDefaultMessage *gdm;
+ size_t slen;
+
+ slen = strlen (service_name) + 1;
+ if (slen >= GNUNET_SERVER_MAX_MESSAGE_SIZE - sizeof (struct GNUNET_IDENTITY_GetDefaultMessage))
+ {
+ GNUNET_break (0);
+ return NULL;
+ }
+ op = GNUNET_malloc (sizeof (struct GNUNET_IDENTITY_Operation) +
+ sizeof (struct GNUNET_IDENTITY_GetDefaultMessage) +
+ slen);
+ op->h = id;
+ op->cb = cb;
+ op->cls = cb_cls;
+ gdm = (struct GNUNET_IDENTITY_GetDefaultMessage *) &op[1];
+ gdm->header.type = htons (GNUNET_MESSAGE_TYPE_IDENTITY_GET_DEFAULT);
+ gdm->header.size = htons (sizeof (struct GNUNET_IDENTITY_GetDefaultMessage) +
+ slen);
+ gdm->name_len = htons (slen);
+ gdm->reserved = htons (0);
+ memcpy (&gdm[1], service_name, slen);
+ op->msg = &gdm->header;
+ GNUNET_CONTAINER_DLL_insert_tail (id->op_head,
+ id->op_tail,
+ op);
+ if (NULL == id->th)
+ transmit_next (id);
+ return op;
+}
+
+
+/**
+ * Set the preferred/default identity for a service.
+ *
+ * @param id identity service to inform
+ * @param service_name for which service is an identity set
+ * @param ego new default identity to be set for this service
+ * @param cont function to call once the operation finished
+ * @param cont_cls closure for @a cont
+ * @return handle to abort the operation
+ */
+struct GNUNET_IDENTITY_Operation *
+GNUNET_IDENTITY_set (struct GNUNET_IDENTITY_Handle *id,
+ const char *service_name,
+ struct GNUNET_IDENTITY_Ego *ego,
+ GNUNET_IDENTITY_Continuation cont,
+ void *cont_cls)
+{
+ struct GNUNET_IDENTITY_Operation *op;
+ struct GNUNET_IDENTITY_SetDefaultMessage *sdm;
+ size_t slen;
+
+ slen = strlen (service_name) + 1;
+ if (slen >= GNUNET_SERVER_MAX_MESSAGE_SIZE - sizeof (struct GNUNET_IDENTITY_SetDefaultMessage))
+ {
+ GNUNET_break (0);
+ return NULL;
+ }
+ op = GNUNET_malloc (sizeof (struct GNUNET_IDENTITY_Operation) +
+ sizeof (struct GNUNET_IDENTITY_SetDefaultMessage) +
+ slen);
+ op->h = id;
+ op->cont = cont;
+ op->cls = cont_cls;
+ sdm = (struct GNUNET_IDENTITY_SetDefaultMessage *) &op[1];
+ sdm->header.type = htons (GNUNET_MESSAGE_TYPE_IDENTITY_SET_DEFAULT);
+ sdm->header.size = htons (sizeof (struct GNUNET_IDENTITY_SetDefaultMessage) +
+ slen);
+ sdm->name_len = htons (slen);
+ sdm->reserved = htons (0);
+ sdm->private_key = *ego->pk;
+ memcpy (&sdm[1], service_name, slen);
+ op->msg = &sdm->header;
+ GNUNET_CONTAINER_DLL_insert_tail (id->op_head,
+ id->op_tail,
+ op);
+ if (NULL == id->th)
+ transmit_next (id);
+ return op;
+}
+
+
+/**
+ * Create a new identity with the given name.
+ *
+ * @param id identity service to use
+ * @param name desired name
+ * @param cont function to call with the result (will only be called once)
+ * @param cont_cls closure for @a cont
+ * @return handle to abort the operation
+ */
+struct GNUNET_IDENTITY_Operation *
+GNUNET_IDENTITY_create (struct GNUNET_IDENTITY_Handle *id,
+ const char *name,
+ GNUNET_IDENTITY_Continuation cont,
+ void *cont_cls)
+{
+ struct GNUNET_IDENTITY_Operation *op;
+ struct GNUNET_IDENTITY_CreateRequestMessage *crm;
+ struct GNUNET_CRYPTO_EcdsaPrivateKey *pk;
+ size_t slen;
+
+ slen = strlen (name) + 1;
+ pk = GNUNET_CRYPTO_ecdsa_key_create ();
+
+ if (slen >= GNUNET_SERVER_MAX_MESSAGE_SIZE - sizeof (struct GNUNET_IDENTITY_CreateRequestMessage))
+ {
+ GNUNET_break (0);
+ GNUNET_free (pk);
+ return NULL;
+ }
+ op = GNUNET_malloc (sizeof (struct GNUNET_IDENTITY_Operation) +
+ sizeof (struct GNUNET_IDENTITY_CreateRequestMessage) +
+ slen);
+ op->h = id;
+ op->cont = cont;
+ op->cls = cont_cls;
+ crm = (struct GNUNET_IDENTITY_CreateRequestMessage *) &op[1];
+ crm->header.type = htons (GNUNET_MESSAGE_TYPE_IDENTITY_CREATE);
+ crm->header.size = htons (sizeof (struct GNUNET_IDENTITY_CreateRequestMessage) +
+ slen);
+ crm->name_len = htons (slen);
+ crm->reserved = htons (0);
+ crm->private_key = *pk;
+ memcpy (&crm[1], name, slen);
+ op->msg = &crm->header;
+ GNUNET_CONTAINER_DLL_insert_tail (id->op_head,
+ id->op_tail,
+ op);
+ if (NULL == id->th)
+ transmit_next (id);
+ GNUNET_free (pk);
+ return op;
+}
+
+
+/**
+ * Renames an existing identity.
+ *
+ * @param id identity service to use
+ * @param old_name old name
+ * @param new_name desired new name
+ * @param cb function to call with the result (will only be called once)
+ * @param cb_cls closure for @a cb
+ * @return handle to abort the operation
+ */
+struct GNUNET_IDENTITY_Operation *
+GNUNET_IDENTITY_rename (struct GNUNET_IDENTITY_Handle *id,
+ const char *old_name,
+ const char *new_name,
+ GNUNET_IDENTITY_Continuation cb,
+ void *cb_cls)
+{
+ struct GNUNET_IDENTITY_Operation *op;
+ struct GNUNET_IDENTITY_RenameMessage *grm;
+ size_t slen_old;
+ size_t slen_new;
+ char *dst;
+
+ slen_old = strlen (old_name) + 1;
+ slen_new = strlen (new_name) + 1;
+ if ( (slen_old >= GNUNET_SERVER_MAX_MESSAGE_SIZE) ||
+ (slen_new >= GNUNET_SERVER_MAX_MESSAGE_SIZE) ||
+ (slen_old + slen_new >= GNUNET_SERVER_MAX_MESSAGE_SIZE - sizeof (struct GNUNET_IDENTITY_RenameMessage)) )
+ {
+ GNUNET_break (0);
+ return NULL;
+ }
+ op = GNUNET_malloc (sizeof (struct GNUNET_IDENTITY_Operation) +
+ sizeof (struct GNUNET_IDENTITY_RenameMessage) +
+ slen_old + slen_new);
+ op->h = id;
+ op->cont = cb;
+ op->cls = cb_cls;
+ grm = (struct GNUNET_IDENTITY_RenameMessage *) &op[1];
+ grm->header.type = htons (GNUNET_MESSAGE_TYPE_IDENTITY_RENAME);
+ grm->header.size = htons (sizeof (struct GNUNET_IDENTITY_RenameMessage) +
+ slen_old + slen_new);
+ grm->old_name_len = htons (slen_old);
+ grm->new_name_len = htons (slen_new);
+ dst = (char *) &grm[1];
+ memcpy (dst, old_name, slen_old);
+ memcpy (&dst[slen_old], new_name, slen_new);
+ op->msg = &grm->header;
+ GNUNET_CONTAINER_DLL_insert_tail (id->op_head,
+ id->op_tail,
+ op);
+ if (NULL == id->th)
+ transmit_next (id);
+ return op;
+}
+
+
+/**
+ * Delete an existing identity.
+ *
+ * @param id identity service to use
+ * @param name name of the identity to delete
+ * @param cb function to call with the result (will only be called once)
+ * @param cb_cls closure for @a cb
+ * @return handle to abort the operation
+ */
+struct GNUNET_IDENTITY_Operation *
+GNUNET_IDENTITY_delete (struct GNUNET_IDENTITY_Handle *id,
+ const char *name,
+ GNUNET_IDENTITY_Continuation cb,
+ void *cb_cls)
+{
+ struct GNUNET_IDENTITY_Operation *op;
+ struct GNUNET_IDENTITY_DeleteMessage *gdm;
+ size_t slen;
+
+ slen = strlen (name) + 1;
+ if (slen >= GNUNET_SERVER_MAX_MESSAGE_SIZE - sizeof (struct GNUNET_IDENTITY_DeleteMessage))
+ {
+ GNUNET_break (0);
+ return NULL;
+ }
+ op = GNUNET_malloc (sizeof (struct GNUNET_IDENTITY_Operation) +
+ sizeof (struct GNUNET_IDENTITY_DeleteMessage) +
+ slen);
+ op->h = id;
+ op->cont = cb;
+ op->cls = cb_cls;
+ gdm = (struct GNUNET_IDENTITY_DeleteMessage *) &op[1];
+ gdm->header.type = htons (GNUNET_MESSAGE_TYPE_IDENTITY_DELETE);
+ gdm->header.size = htons (sizeof (struct GNUNET_IDENTITY_DeleteMessage) +
+ slen);
+ gdm->name_len = htons (slen);
+ gdm->reserved = htons (0);
+ memcpy (&gdm[1], name, slen);
+ op->msg = &gdm->header;
+ GNUNET_CONTAINER_DLL_insert_tail (id->op_head,
+ id->op_tail,
+ op);
+ if (NULL == id->th)
+ transmit_next (id);
+ return op;
+}
+
+
+/**
+ * Cancel an identity operation. Note that the operation MAY still
+ * be executed; this merely cancels the continuation; if the request
+ * was already transmitted, the service may still choose to complete
+ * the operation.
+ *
+ * @param op operation to cancel
+ */
+void
+GNUNET_IDENTITY_cancel (struct GNUNET_IDENTITY_Operation *op)
+{
+ struct GNUNET_IDENTITY_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->cont = NULL;
+ op->cb = NULL;
+}
+
+
+/**
+ * Free ego from hash map.
+ *
+ * @param cls identity service handle
+ * @param key unused
+ * @param value ego to free
+ * @return #GNUNET_OK (continue to iterate)
+ */
+static int
+free_ego (void *cls,
+ const struct GNUNET_HashCode *key,
+ void *value)
+{
+ struct GNUNET_IDENTITY_Handle *h = cls;
+ struct GNUNET_IDENTITY_Ego *ego = value;
+
+ if (NULL != h->cb)
+ h->cb (h->cb_cls,
+ ego,
+ &ego->ctx,
+ NULL);
+ GNUNET_free (ego->pk);
+ GNUNET_free (ego->name);
+ GNUNET_free (ego);
+ return GNUNET_OK;
}
void
GNUNET_IDENTITY_disconnect (struct GNUNET_IDENTITY_Handle *h)
{
+ struct GNUNET_IDENTITY_Operation *op;
+
GNUNET_assert (NULL != h);
- if (h->reconnect_task != GNUNET_SCHEDULER_NO_TASK)
+ if (h->reconnect_task != NULL)
{
GNUNET_SCHEDULER_cancel (h->reconnect_task);
- h->reconnect_task = GNUNET_SCHEDULER_NO_TASK;
+ h->reconnect_task = NULL;
}
- if (h->th != NULL)
+ if (NULL != h->th)
{
GNUNET_CLIENT_notify_transmit_ready_cancel (h->th);
h->th = NULL;
}
- if (h->client != NULL)
+ if (NULL != h->egos)
+ {
+ GNUNET_CONTAINER_multihashmap_iterate (h->egos,
+ &free_ego,
+ h);
+ GNUNET_CONTAINER_multihashmap_destroy (h->egos);
+ h->egos = NULL;
+ }
+ while (NULL != (op = h->op_head))
+ {
+ GNUNET_break (NULL == op->cont);
+ 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;
projects / oweals / gnunet.git / blobdiff