/*
This file is part of GNUnet
- (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009 Christian Grothoff (and other contributing authors)
+ (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 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
* @author Christian Grothoff
*/
#include "platform.h"
+#include "gnunet_constants.h"
+#include "gnunet_signatures.h"
+#include "gnunet_util_lib.h"
#include "gnunet_fs_service.h"
+#include "fs_api.h"
/**
- * Publish an advertismement for a namespace.
+ * Maximum legal size for an sblock.
+ */
+#define MAX_SBLOCK_SIZE (60 * 1024)
+
+
+/**
+ * Return the name of the directory in which we store
+ * our local namespaces (or rather, their public keys).
*
- * @param h handle to the file sharing subsystem
- * @param namespace handle for the namespace that should be advertised
- * @param meta meta-data for the namespace advertisement
- * @param anonymity for the namespace advertismement
- * @param priority for the namespace advertisement
- * @param expiration for the namespace advertisement
- * @param advertisementURI the keyword (!) URI to advertise the
- * namespace under (we will create a GNUNET_EC_KNBlock)
- * @param rootEntry name of the root entry in the namespace (for
- * the namespace advertisement)
+ * @param h global fs handle
+ * @return NULL on error, otherwise the name of the directory
+ */
+static char *
+get_namespace_directory (struct GNUNET_FS_Handle *h)
+{
+ char *dn;
+
+ if (GNUNET_OK !=
+ GNUNET_CONFIGURATION_get_value_filename (h->cfg, "FS", "IDENTITY_DIR",
+ &dn))
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ _("Configuration fails to specify `%s' in section `%s'\n"),
+ "IDENTITY_DIR", "fs");
+ return NULL;
+ }
+ return dn;
+}
+
+
+/**
+ * Return the name of the directory in which we store
+ * the update information graph for the given local namespace.
+ *
+ * @param ns namespace handle
+ * @return NULL on error, otherwise the name of the directory
+ */
+static char *
+get_update_information_directory (struct GNUNET_FS_Namespace *ns)
+{
+ char *dn;
+ char *ret;
+
+ if (GNUNET_OK !=
+ GNUNET_CONFIGURATION_get_value_filename (ns->h->cfg, "FS", "UPDATE_DIR",
+ &dn))
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ _("Configuration fails to specify `%s' in section `%s'\n"),
+ "UPDATE_DIR", "fs");
+ return NULL;
+ }
+ GNUNET_asprintf (&ret, "%s%s%s", dn, DIR_SEPARATOR_STR, ns->name);
+ GNUNET_free (dn);
+ return ret;
+}
+
+
+/**
+ * Write the namespace update node graph to a file.
*
- * @return uri of the advertisement
+ * @param ns namespace to dump
*/
-struct GNUNET_FS_Uri *
-GNUNET_FS_namespace_advertise (struct GNUNET_FS_Handle *h,
- struct GNUNET_FS_Namespace *namespace,
- const struct GNUNET_MetaData *meta,
- unsigned int anonymity,
- unsigned int priority,
- struct GNUNET_TIME_Absolute expiration,
- const struct GNUNET_FS_Uri *advertisementURI,
- const char *rootEntry)
+static void
+write_update_information_graph (struct GNUNET_FS_Namespace *ns)
{
- return NULL;
+ char *fn;
+ struct GNUNET_BIO_WriteHandle *wh;
+ unsigned int i;
+ struct NamespaceUpdateNode *n;
+ char *uris;
+
+ fn = get_update_information_directory (ns);
+ wh = GNUNET_BIO_write_open (fn);
+ if (wh == NULL)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ _("Failed to open `%s' for writing: %s\n"), STRERROR (errno));
+ GNUNET_free (fn);
+ return;
+ }
+ if (GNUNET_OK != GNUNET_BIO_write_int32 (wh, ns->update_node_count))
+ goto END;
+ for (i = 0; i < ns->update_node_count; i++)
+ {
+ n = ns->update_nodes[i];
+ uris = GNUNET_FS_uri_to_string (n->uri);
+ if ((GNUNET_OK != GNUNET_BIO_write_string (wh, n->id)) ||
+ (GNUNET_OK != GNUNET_BIO_write_meta_data (wh, n->md)) ||
+ (GNUNET_OK != GNUNET_BIO_write_string (wh, n->update)) ||
+ (GNUNET_OK != GNUNET_BIO_write_string (wh, uris)))
+ {
+ GNUNET_free (uris);
+ break;
+ }
+ GNUNET_free (uris);
+ }
+END:
+ if (GNUNET_OK != GNUNET_BIO_write_close (wh))
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR, _("Failed to write `%s': %s\n"),
+ STRERROR (errno));
+ GNUNET_free (fn);
+}
+
+
+/**
+ * Read the namespace update node graph from a file.
+ *
+ * @param ns namespace to read
+ */
+static void
+read_update_information_graph (struct GNUNET_FS_Namespace *ns)
+{
+ char *fn;
+ struct GNUNET_BIO_ReadHandle *rh;
+ unsigned int i;
+ struct NamespaceUpdateNode *n;
+ char *uris;
+ uint32_t count;
+ char *emsg;
+
+ fn = get_update_information_directory (ns);
+ if (GNUNET_YES != GNUNET_DISK_file_test (fn))
+ {
+ GNUNET_free (fn);
+ return;
+ }
+ rh = GNUNET_BIO_read_open (fn);
+ if (rh == NULL)
+ {
+ GNUNET_free (fn);
+ return;
+ }
+ if (GNUNET_OK != GNUNET_BIO_read_int32 (rh, &count))
+ {
+ GNUNET_break (0);
+ goto END;
+ }
+ if (count > 1024 * 1024)
+ {
+ GNUNET_break (0);
+ goto END;
+ }
+ if (count == 0)
+ {
+ GNUNET_break (GNUNET_OK == GNUNET_BIO_read_close (rh, NULL));
+ GNUNET_free (fn);
+ return;
+ }
+ ns->update_nodes =
+ GNUNET_malloc (count * sizeof (struct NamespaceUpdateNode *));
+
+ for (i = 0; i < count; i++)
+ {
+ n = GNUNET_malloc (sizeof (struct NamespaceUpdateNode));
+ if ((GNUNET_OK != GNUNET_BIO_read_string (rh, "identifier", &n->id, 1024))
+ || (GNUNET_OK != GNUNET_BIO_read_meta_data (rh, "meta", &n->md)) ||
+ (GNUNET_OK !=
+ GNUNET_BIO_read_string (rh, "update-id", &n->update, 1024)) ||
+ (GNUNET_OK != GNUNET_BIO_read_string (rh, "uri", &uris, 1024 * 2)))
+ {
+ GNUNET_break (0);
+ GNUNET_free_non_null (n->id);
+ GNUNET_free_non_null (n->update);
+ if (n->md != NULL)
+ GNUNET_CONTAINER_meta_data_destroy (n->md);
+ GNUNET_free (n);
+ break;
+ }
+ n->uri = GNUNET_FS_uri_parse (uris, &emsg);
+ GNUNET_free (uris);
+ if (n->uri == NULL)
+ {
+ GNUNET_break (0);
+ GNUNET_free (emsg);
+ GNUNET_free (n->id);
+ GNUNET_free_non_null (n->update);
+ GNUNET_CONTAINER_meta_data_destroy (n->md);
+ GNUNET_free (n);
+ break;
+ }
+ ns->update_nodes[i] = n;
+ }
+ ns->update_node_count = i;
+END:
+ if (GNUNET_OK != GNUNET_BIO_read_close (rh, &emsg))
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR, _("Failed to write `%s': %s\n"), emsg);
+ GNUNET_free (emsg);
+ }
+ GNUNET_free (fn);
}
+
+
/**
* Create a namespace with the given name; if one already
* exists, return a handle to the existing namespace.
* @return handle to the namespace, NULL on error
*/
struct GNUNET_FS_Namespace *
-GNUNET_FS_namespace_create (struct GNUNET_FS_Handle *h,
- const char *name)
+GNUNET_FS_namespace_create (struct GNUNET_FS_Handle *h, const char *name)
+{
+ char *dn;
+ char *fn;
+ struct GNUNET_FS_Namespace *ret;
+
+ dn = get_namespace_directory (h);
+ GNUNET_asprintf (&fn, "%s%s%s", dn, DIR_SEPARATOR_STR, name);
+ GNUNET_free (dn);
+ ret = GNUNET_malloc (sizeof (struct GNUNET_FS_Namespace));
+ ret->h = h;
+ ret->rc = 1;
+ ret->key = GNUNET_CRYPTO_rsa_key_create_from_file (fn);
+ if (ret->key == NULL)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ _("Failed to create or read private key for namespace `%s'\n"),
+ name);
+ GNUNET_free (ret);
+ GNUNET_free (fn);
+ return NULL;
+ }
+ ret->name = GNUNET_strdup (name);
+ ret->filename = fn;
+ return ret;
+}
+
+
+/**
+ * Duplicate a namespace handle.
+ *
+ * @param ns namespace handle
+ * @return duplicated handle to the namespace
+ */
+struct GNUNET_FS_Namespace *
+GNUNET_FS_namespace_dup (struct GNUNET_FS_Namespace *ns)
{
- return NULL;
+ ns->rc++;
+ return ns;
}
*
* @return GNUNET_OK on success, GNUNET_SYSERR on error
*/
-int
-GNUNET_FS_namespace_delete (struct GNUNET_FS_Namespace *namespace,
- int freeze)
+int
+GNUNET_FS_namespace_delete (struct GNUNET_FS_Namespace *namespace, int freeze)
+{
+ unsigned int i;
+ struct NamespaceUpdateNode *nsn;
+
+ namespace->rc--;
+ if (freeze)
+ {
+ if (0 != UNLINK (namespace->filename))
+ GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_ERROR, "unlink",
+ namespace->filename);
+ }
+ if (0 != namespace->rc)
+ return GNUNET_OK;
+ GNUNET_CRYPTO_rsa_key_free (namespace->key);
+ GNUNET_free (namespace->filename);
+ GNUNET_free (namespace->name);
+ for (i = 0; i < namespace->update_node_count; i++)
+ {
+ nsn = namespace->update_nodes[i];
+ GNUNET_CONTAINER_meta_data_destroy (nsn->md);
+ GNUNET_FS_uri_destroy (nsn->uri);
+ GNUNET_free (nsn->id);
+ GNUNET_free (nsn->update);
+ GNUNET_free (nsn);
+ }
+ GNUNET_array_grow (namespace->update_nodes, namespace->update_node_count,
+ 0);
+ if (namespace->update_map != NULL)
+ GNUNET_CONTAINER_multihashmap_destroy (namespace->update_map);
+ GNUNET_free (namespace);
+ return GNUNET_OK;
+}
+
+
+/**
+ * Context for the 'process_namespace' callback.
+ * Specifies a function to call on each namespace.
+ */
+struct ProcessNamespaceContext
+{
+ /**
+ * Function to call.
+ */
+ GNUNET_FS_NamespaceInfoProcessor cb;
+
+ /**
+ * Closure for 'cb'.
+ */
+ void *cb_cls;
+};
+
+
+/**
+ * Function called with a filename of a namespace. Reads the key and
+ * calls the callback.
+ *
+ * @param cls closure (struct ProcessNamespaceContext)
+ * @param filename complete filename (absolute path)
+ * @return GNUNET_OK to continue to iterate,
+ * GNUNET_SYSERR to abort iteration with error!
+ */
+static int
+process_namespace (void *cls, const char *filename)
{
- return GNUNET_SYSERR;
+ struct ProcessNamespaceContext *pnc = cls;
+ struct GNUNET_CRYPTO_RsaPrivateKey *key;
+ struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded pk;
+ GNUNET_HashCode id;
+ const char *name;
+ const char *t;
+
+ key = GNUNET_CRYPTO_rsa_key_create_from_file (filename);
+ if (key == NULL)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
+ _
+ ("Failed to read namespace private key file `%s', deleting it!\n"),
+ filename);
+ if (0 != UNLINK (filename))
+ GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_WARNING, "unlink", filename);
+ return GNUNET_OK;
+ }
+ GNUNET_CRYPTO_rsa_key_get_public (key, &pk);
+ GNUNET_CRYPTO_rsa_key_free (key);
+ GNUNET_CRYPTO_hash (&pk, sizeof (pk), &id);
+ name = filename;
+ while (NULL != (t = strstr (name, DIR_SEPARATOR_STR)))
+ name = t + 1;
+ pnc->cb (pnc->cb_cls, name, &id);
+ return GNUNET_OK;
}
* @param cb function to call on each known namespace
* @param cb_cls closure for cb
*/
-void
+void
GNUNET_FS_namespace_list (struct GNUNET_FS_Handle *h,
- GNUNET_FS_NamespaceInfoProcessor cb,
- void *cb_cls)
+ GNUNET_FS_NamespaceInfoProcessor cb, void *cb_cls)
{
+ char *dn;
+ struct ProcessNamespaceContext ctx;
+
+ dn = get_namespace_directory (h);
+ if (dn == NULL)
+ return;
+ ctx.cb = cb;
+ ctx.cb_cls = cb_cls;
+ GNUNET_DISK_directory_scan (dn, &process_namespace, &ctx);
+ GNUNET_free (dn);
}
-/* end of fs_namespace.c */
-
-#if 0
-/*
- This file is part of GNUnet
- (C) 2004, 2005, 2006 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
- option) any later version.
-
- GNUnet is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with GNUnet; see the file COPYING. If not, write to the
- Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA.
-*/
/**
- * @file applications/fs/ecrs/namespace.c
- * @brief creation, deletion and advertising of namespaces
- * @author Christian Grothoff
+ * Context for the SKS publication.
*/
+struct GNUNET_FS_PublishSksContext
+{
-#include "platform.h"
-#include "gnunet_directories.h"
-#include "gnunet_protocols.h"
-#include "gnunet_ecrs_lib.h"
-#include "gnunet_fs_lib.h"
-#include "ecrs_core.h"
-#include "ecrs.h"
+ /**
+ * URI of the new entry in the namespace.
+ */
+ struct GNUNET_FS_Uri *uri;
+
+ /**
+ * Namespace update node to add to namespace on success (or to be
+ * deleted if publishing failed).
+ */
+ struct NamespaceUpdateNode *nsn;
+
+ /**
+ * Namespace we're publishing to.
+ */
+ struct GNUNET_FS_Namespace *namespace;
+
+ /**
+ * Handle to the datastore.
+ */
+ struct GNUNET_DATASTORE_Handle *dsh;
+
+ /**
+ * Function to call once we're done.
+ */
+ GNUNET_FS_PublishContinuation cont;
+
+ /**
+ * Closure for cont.
+ */
+ void *cont_cls;
+
+ /**
+ * Handle for our datastore request.
+ */
+ struct GNUNET_DATASTORE_QueueEntry *dqe;
+};
-#define PSEUDODIR "data/namespace/keys/"
-#define INITVALUE "GNUnet!!"
-#define MAX_SBLOCK_SIZE 32000
-static char *
-getPseudonymFileName (struct GNUNET_GE_Context *ectx,
- struct GNUNET_GC_Configuration *cfg,
- const GNUNET_HashCode * pid)
+/**
+ * Function called by the datastore API with
+ * the result from the PUT (SBlock) request.
+ *
+ * @param cls closure of type "struct GNUNET_FS_PublishSksContext*"
+ * @param success GNUNET_OK on success
+ * @param min_expiration minimum expiration time required for content to be stored
+ * @param msg error message (or NULL)
+ */
+static void
+sb_put_cont (void *cls, int success,
+ struct GNUNET_TIME_Absolute min_expiration,
+ const char *msg)
{
- char *gnHome;
- char *fileName;
- GNUNET_EncName enc;
-
- GNUNET_GC_get_configuration_value_filename (cfg,
- "GNUNET",
- "GNUNET_HOME",
- GNUNET_DEFAULT_HOME_DIRECTORY,
- &fileName);
- gnHome = GNUNET_expand_file_name (ectx, fileName);
- GNUNET_free (fileName);
- fileName =
- GNUNET_malloc (strlen (gnHome) + strlen (PSEUDODIR) +
- sizeof (GNUNET_EncName) + 2);
- strcpy (fileName, gnHome);
- GNUNET_free (gnHome);
- strcat (fileName, DIR_SEPARATOR_STR);
- strcat (fileName, PSEUDODIR);
- GNUNET_disk_directory_create (ectx, fileName);
- if (pid != NULL)
+ struct GNUNET_FS_PublishSksContext *psc = cls;
+ GNUNET_HashCode hc;
+
+ psc->dqe = NULL;
+ if (GNUNET_OK != success)
+ {
+ if (NULL != psc->cont)
+ psc->cont (psc->cont_cls, NULL, msg);
+ GNUNET_FS_publish_sks_cancel (psc);
+ return;
+ }
+ if (NULL != psc->nsn)
+ {
+ /* FIXME: this can be done much more
+ * efficiently by simply appending to the
+ * file and overwriting the 4-byte header */
+ if (psc->namespace->update_nodes == NULL)
+ read_update_information_graph (psc->namespace);
+ GNUNET_array_append (psc->namespace->update_nodes,
+ psc->namespace->update_node_count, psc->nsn);
+ if (psc->namespace->update_map != NULL)
{
- GNUNET_hash_to_enc (pid, &enc);
- strcat (fileName, (char *) &enc);
+ GNUNET_CRYPTO_hash (psc->nsn->id, strlen (psc->nsn->id), &hc);
+ GNUNET_CONTAINER_multihashmap_put (psc->namespace->update_map, &hc,
+ psc->nsn,
+ GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
}
- return fileName;
+ psc->nsn = NULL;
+ write_update_information_graph (psc->namespace);
+ }
+ if (NULL != psc->cont)
+ psc->cont (psc->cont_cls, psc->uri, NULL);
+ GNUNET_FS_publish_sks_cancel (psc);
}
/**
- * Check if the given namespace exists (locally).
+ * Publish an SBlock on GNUnet.
*
- * @return GNUNET_OK if the namespace exists, GNUNET_SYSERR if not
+ * @param h handle to the file sharing subsystem
+ * @param namespace namespace to publish in
+ * @param identifier identifier to use
+ * @param update update identifier to use
+ * @param meta metadata to use
+ * @param uri URI to refer to in the SBlock
+ * @param bo block options
+ * @param options publication options
+ * @param cont continuation
+ * @param cont_cls closure for cont
+ * @return NULL on error ('cont' will still be called)
*/
-int
-GNUNET_ECRS_namespace_test_exists (struct GNUNET_GE_Context *ectx,
- struct GNUNET_GC_Configuration *cfg,
- const GNUNET_HashCode * pid)
+struct GNUNET_FS_PublishSksContext *
+GNUNET_FS_publish_sks (struct GNUNET_FS_Handle *h,
+ struct GNUNET_FS_Namespace *namespace,
+ const char *identifier, const char *update,
+ const struct GNUNET_CONTAINER_MetaData *meta,
+ const struct GNUNET_FS_Uri *uri,
+ const struct GNUNET_FS_BlockOptions *bo,
+ enum GNUNET_FS_PublishOptions options,
+ GNUNET_FS_PublishContinuation cont, void *cont_cls)
{
- char *fileName;
- int ret;
-
- fileName = getPseudonymFileName (ectx, cfg, pid);
- ret = GNUNET_disk_file_test (ectx, fileName);
- GNUNET_free (fileName);
- return ret;
+ struct GNUNET_FS_PublishSksContext *psc;
+ struct GNUNET_CRYPTO_AesSessionKey sk;
+ struct GNUNET_CRYPTO_AesInitializationVector iv;
+ struct GNUNET_FS_Uri *sks_uri;
+ char *uris;
+ size_t size;
+ size_t slen;
+ size_t nidlen;
+ size_t idlen;
+ ssize_t mdsize;
+ struct SBlock *sb;
+ struct SBlock *sb_enc;
+ char *dest;
+ struct GNUNET_CONTAINER_MetaData *mmeta;
+ GNUNET_HashCode key; /* hash of thisId = key */
+ GNUNET_HashCode id; /* hash of hc = identifier */
+ GNUNET_HashCode query; /* id ^ nsid = DB query */
+
+ if (NULL == meta)
+ mmeta = GNUNET_CONTAINER_meta_data_create ();
+ else
+ mmeta = GNUNET_CONTAINER_meta_data_duplicate (meta);
+ uris = GNUNET_FS_uri_to_string (uri);
+ slen = strlen (uris) + 1;
+ idlen = strlen (identifier);
+ if (update != NULL)
+ nidlen = strlen (update) + 1;
+ else
+ nidlen = 1;
+ mdsize = GNUNET_CONTAINER_meta_data_get_serialized_size (mmeta);
+ size = sizeof (struct SBlock) + slen + nidlen + mdsize;
+ if (size > MAX_SBLOCK_SIZE)
+ {
+ size = MAX_SBLOCK_SIZE;
+ mdsize = size - (sizeof (struct SBlock) + slen + nidlen);
+ }
+ sb = GNUNET_malloc (sizeof (struct SBlock) + size);
+ dest = (char *) &sb[1];
+ if (update != NULL)
+ memcpy (dest, update, nidlen);
+ else
+ memset (dest, 0, 1);
+ dest += nidlen;
+ memcpy (dest, uris, slen);
+ GNUNET_free (uris);
+ dest += slen;
+ mdsize =
+ GNUNET_CONTAINER_meta_data_serialize (mmeta, &dest, mdsize,
+ GNUNET_CONTAINER_META_DATA_SERIALIZE_PART);
+ GNUNET_CONTAINER_meta_data_destroy (mmeta);
+ if (mdsize == -1)
+ {
+ GNUNET_break (0);
+ GNUNET_free (sb);
+ if (NULL != cont)
+ cont (cont_cls, NULL, _("Internal error."));
+ return NULL;
+ }
+ size = sizeof (struct SBlock) + mdsize + slen + nidlen;
+ sb_enc = GNUNET_malloc (size);
+ GNUNET_CRYPTO_hash (identifier, idlen, &key);
+ GNUNET_CRYPTO_hash (&key, sizeof (GNUNET_HashCode), &id);
+ sks_uri = GNUNET_malloc (sizeof (struct GNUNET_FS_Uri));
+ sks_uri->type = sks;
+ GNUNET_CRYPTO_rsa_key_get_public (namespace->key, &sb_enc->subspace);
+ GNUNET_CRYPTO_hash (&sb_enc->subspace,
+ sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
+ &sks_uri->data.sks.namespace);
+ sks_uri->data.sks.identifier = GNUNET_strdup (identifier);
+ GNUNET_CRYPTO_hash_xor (&id, &sks_uri->data.sks.namespace,
+ &sb_enc->identifier);
+ GNUNET_CRYPTO_hash_to_aes_key (&key, &sk, &iv);
+ GNUNET_CRYPTO_aes_encrypt (&sb[1], size - sizeof (struct SBlock), &sk, &iv,
+ &sb_enc[1]);
+ sb_enc->purpose.purpose = htonl (GNUNET_SIGNATURE_PURPOSE_FS_SBLOCK);
+ sb_enc->purpose.size =
+ htonl (slen + mdsize + nidlen + sizeof (struct SBlock) -
+ sizeof (struct GNUNET_CRYPTO_RsaSignature));
+ GNUNET_assert (GNUNET_OK ==
+ GNUNET_CRYPTO_rsa_sign (namespace->key, &sb_enc->purpose,
+ &sb_enc->signature));
+ psc = GNUNET_malloc (sizeof (struct GNUNET_FS_PublishSksContext));
+ psc->uri = sks_uri;
+ psc->cont = cont;
+ psc->namespace = GNUNET_FS_namespace_dup (namespace);
+ psc->cont_cls = cont_cls;
+ if (0 != (options & GNUNET_FS_PUBLISH_OPTION_SIMULATE_ONLY))
+ {
+ GNUNET_free (sb_enc);
+ GNUNET_free (sb);
+ sb_put_cont (psc, GNUNET_OK, GNUNET_TIME_UNIT_ZERO_ABS, NULL);
+ return NULL;
+ }
+ psc->dsh = GNUNET_DATASTORE_connect (h->cfg);
+ if (NULL == psc->dsh)
+ {
+ GNUNET_free (sb_enc);
+ GNUNET_free (sb);
+ sb_put_cont (psc, GNUNET_NO, GNUNET_TIME_UNIT_ZERO_ABS, _("Failed to connect to datastore."));
+ return NULL;
+ }
+ GNUNET_CRYPTO_hash_xor (&sks_uri->data.sks.namespace, &id, &query);
+ if (NULL != update)
+ {
+ psc->nsn = GNUNET_malloc (sizeof (struct NamespaceUpdateNode));
+ psc->nsn->id = GNUNET_strdup (identifier);
+ psc->nsn->update = GNUNET_strdup (update);
+ psc->nsn->md = GNUNET_CONTAINER_meta_data_duplicate (meta);
+ psc->nsn->uri = GNUNET_FS_uri_dup (uri);
+ }
+ psc->dqe = GNUNET_DATASTORE_put (psc->dsh, 0, &sb_enc->identifier, size, sb_enc,
+ GNUNET_BLOCK_TYPE_FS_SBLOCK, bo->content_priority,
+ bo->anonymity_level, bo->replication_level,
+ bo->expiration_time, -2, 1,
+ GNUNET_CONSTANTS_SERVICE_TIMEOUT, &sb_put_cont, psc);
+ GNUNET_free (sb);
+ GNUNET_free (sb_enc);
+ return psc;
}
+
/**
- * Delete a local namespace.
+ * Abort the SKS publishing operation.
*
- * @return GNUNET_OK on success, GNUNET_SYSERR on error
+ * @param psc context of the operation to abort.
*/
-int
-GNUNET_ECRS_namespace_delete (struct GNUNET_GE_Context *ectx,
- struct GNUNET_GC_Configuration *cfg,
- const GNUNET_HashCode * pid)
+void
+GNUNET_FS_publish_sks_cancel (struct GNUNET_FS_PublishSksContext *psc)
{
- char *fileName;
-
- fileName = getPseudonymFileName (ectx, cfg, pid);
- if (GNUNET_YES != GNUNET_disk_file_test (ectx, fileName))
- {
- GNUNET_free (fileName);
- return GNUNET_SYSERR; /* no such namespace */
- }
- if (0 != UNLINK (fileName))
- {
- GNUNET_GE_LOG_STRERROR_FILE (ectx,
- GNUNET_GE_WARNING | GNUNET_GE_USER |
- GNUNET_GE_BULK, "unlink", fileName);
- GNUNET_free (fileName);
- return GNUNET_SYSERR;
- }
- GNUNET_free (fileName);
- return GNUNET_OK;
+ if (NULL != psc->dqe)
+ {
+ GNUNET_DATASTORE_cancel (psc->dqe);
+ psc->dqe = NULL;
+ }
+ if (NULL != psc->dsh)
+ {
+ GNUNET_DATASTORE_disconnect (psc->dsh, GNUNET_NO);
+ psc->dsh = NULL;
+ }
+ GNUNET_FS_namespace_delete (psc->namespace, GNUNET_NO);
+ GNUNET_FS_uri_destroy (psc->uri);
+ if (NULL != psc->nsn)
+ {
+ GNUNET_CONTAINER_meta_data_destroy (psc->nsn->md);
+ GNUNET_FS_uri_destroy (psc->nsn->uri);
+ GNUNET_free (psc->nsn->id);
+ GNUNET_free (psc->nsn->update);
+ GNUNET_free (psc->nsn);
+ }
+ GNUNET_free (psc);
}
+
/**
- * Write the private key of the namespace to a file.
+ * Closure for 'process_update_node'.
*/
-static int
-write_namespace_key (struct GNUNET_GC_Configuration *cfg,
- const struct GNUNET_RSA_PrivateKey *key)
+struct ProcessUpdateClosure
{
- GNUNET_RSA_PrivateKeyEncoded *namespace_priv_key_encoded;
- char *fileName;
- GNUNET_RSA_PublicKey pubk;
- GNUNET_HashCode pid;
-
- GNUNET_RSA_get_public_key (key, &pubk);
- GNUNET_hash (&pubk, sizeof (GNUNET_RSA_PublicKey), &pid);
- fileName = getPseudonymFileName (NULL, cfg, &pid);
- if (GNUNET_YES == GNUNET_disk_file_test (NULL, fileName))
- {
- GNUNET_GE_BREAK (NULL, 0); /* hash collision!? */
- GNUNET_free (fileName);
- return GNUNET_SYSERR;
- }
- namespace_priv_key_encoded = GNUNET_RSA_encode_key (key);
- GNUNET_disk_file_write (NULL, fileName,
- (const char *) namespace_priv_key_encoded,
- ntohs (namespace_priv_key_encoded->len), "600");
- GNUNET_free (fileName);
- GNUNET_free (namespace_priv_key_encoded);
- return GNUNET_OK;
-}
+ /**
+ * Function to call for each node.
+ */
+ GNUNET_FS_IdentifierProcessor ip;
+
+ /**
+ * Closure for 'ip'.
+ */
+ void *ip_cls;
+};
+
/**
- * Create a new namespace (and publish an advertismement).
- * This publishes both an GNUNET_EC_NBlock in the namespace itself
- * as well as KNBlocks under all keywords specified in
- * the advertisementURI.
+ * Call the iterator in the closure for each node.
*
- * @param anonymity_level for the namespace advertismement
- * @param priority for the namespace advertisement
- * @param expiration for the namespace advertisement
- * @param advertisementURI the keyword (!) URI to advertise the
- * namespace under (GNUNET_EC_KNBlock)
- * @param meta meta-data for the namespace advertisement
- * (will be used to derive a name)
- * @param rootEntry name of the root entry in the namespace (for
- * the namespace advertisement)
- * @param rootURI set to the URI of the namespace, NULL if
- * no advertisement was created
- *
- * @return URI on success, NULL on error
+ * @param cls closure (of type 'struct ProcessUpdateClosure *')
+ * @param key current key code
+ * @param value value in the hash map (of type 'struct NamespaceUpdateNode *')
+ * @return GNUNET_YES if we should continue to
+ * iterate,
+ * GNUNET_NO if not.
*/
-struct GNUNET_ECRS_URI *
-GNUNET_ECRS_namespace_create (struct GNUNET_GE_Context *ectx,
- struct GNUNET_GC_Configuration *cfg,
- const struct GNUNET_MetaData *meta,
- unsigned int anonymityLevel,
- unsigned int priority,
- GNUNET_CronTime expiration,
- const struct GNUNET_ECRS_URI *advertisementURI,
- const char *rootEntry)
+static int
+process_update_node (void *cls, const GNUNET_HashCode * key, void *value)
{
- struct GNUNET_ECRS_URI *rootURI;
- struct GNUNET_RSA_PrivateKey *namespace_priv_key;
- GNUNET_HashCode hc;
- struct GNUNET_ClientServerConnection *sock;
- GNUNET_DatastoreValue *value;
- GNUNET_DatastoreValue *knvalue;
- unsigned int size;
- unsigned int mdsize;
- struct GNUNET_RSA_PrivateKey *pk;
- GNUNET_EC_SBlock *sb;
- GNUNET_EC_KSBlock *ksb;
- char **keywords;
- const char *keyword;
- unsigned int keywordCount;
- int i;
- char *cpy;
- char *rtgt;
-
- if ((advertisementURI != NULL)
- && (!GNUNET_ECRS_uri_test_ksk (advertisementURI)))
- {
- GNUNET_GE_BREAK (ectx, 0);
- return NULL;
- }
- namespace_priv_key = GNUNET_RSA_create_key ();
- if (GNUNET_OK != write_namespace_key (cfg, namespace_priv_key))
- {
- GNUNET_RSA_free_key (namespace_priv_key);
- return NULL;
- }
-
- /* create advertisements */
- mdsize = GNUNET_meta_data_get_serialized_size (meta, GNUNET_SERIALIZE_PART);
- size = mdsize + sizeof (GNUNET_EC_SBlock) + strlen (rootEntry) + 2;
- if (size > MAX_SBLOCK_SIZE)
- {
- size = MAX_SBLOCK_SIZE;
- mdsize = size - sizeof (GNUNET_EC_SBlock) - strlen (rootEntry) - 2;
- }
- value = GNUNET_malloc (sizeof (GNUNET_DatastoreValue) + size);
- memset (value, 0, sizeof (GNUNET_DatastoreValue) + size);
- sb = (GNUNET_EC_SBlock *) & value[1];
- sb->type = htonl (GNUNET_ECRS_BLOCKTYPE_SIGNED);
- GNUNET_RSA_get_public_key (namespace_priv_key, &sb->subspace);
- rtgt = (char *) &sb[1];
- memcpy (rtgt, rootEntry, strlen (rootEntry) + 1);
- mdsize = GNUNET_meta_data_serialize (ectx,
- meta,
- &rtgt[strlen (rootEntry) + 2],
- mdsize, GNUNET_SERIALIZE_PART);
- if (mdsize == -1)
- {
- GNUNET_GE_BREAK (ectx, 0);
- GNUNET_RSA_free_key (namespace_priv_key);
- GNUNET_free (value);
- return NULL;
- }
- size = mdsize + sizeof (GNUNET_EC_SBlock) + strlen (rootEntry) + 2;
- GNUNET_GE_ASSERT (ectx,
- GNUNET_OK == GNUNET_RSA_sign (namespace_priv_key,
- size
- -
- sizeof
- (GNUNET_RSA_Signature) -
- sizeof
- (GNUNET_RSA_PublicKey) -
- sizeof (unsigned int),
- &sb->identifier,
- &sb->signature));
- value->size = htonl (sizeof (GNUNET_DatastoreValue) + size);
- value->type = htonl (GNUNET_ECRS_BLOCKTYPE_SIGNED);
- value->priority = htonl (priority);
- value->anonymity_level = htonl (anonymityLevel);
- value->expiration_time = GNUNET_htonll (expiration);
- sock = GNUNET_client_connection_create (ectx, cfg);
- if (sock == NULL)
- {
- GNUNET_free (value);
- GNUNET_RSA_free_key (namespace_priv_key);
- return NULL;
- }
- if (GNUNET_OK != GNUNET_FS_insert (sock, value))
- {
- GNUNET_free (value);
- GNUNET_client_connection_destroy (sock);
- GNUNET_RSA_free_key (namespace_priv_key);
- return NULL;
- }
-
-
- /* publish KNBlocks */
- size += sizeof (GNUNET_EC_KSBlock) - sizeof (GNUNET_EC_SBlock);
- knvalue = GNUNET_malloc (sizeof (GNUNET_DatastoreValue) + size);
- *knvalue = *value;
- knvalue->type = htonl (GNUNET_ECRS_BLOCKTYPE_KEYWORD_SIGNED);
- knvalue->size = htonl (sizeof (GNUNET_DatastoreValue) + size);
- ksb = (GNUNET_EC_KSBlock *) & knvalue[1];
- ksb->type = htonl (GNUNET_ECRS_BLOCKTYPE_KEYWORD_SIGNED);
- memcpy (&ksb->sblock,
- sb, sizeof (GNUNET_EC_SBlock) + mdsize + strlen (rootEntry) + 2);
+ struct ProcessUpdateClosure *pc = cls;
+ struct NamespaceUpdateNode *nsn = value;
- if (advertisementURI != NULL)
- {
- keywords = advertisementURI->data.ksk.keywords;
- keywordCount = advertisementURI->data.ksk.keywordCount;
- cpy =
- GNUNET_malloc (size - sizeof (GNUNET_EC_KBlock) -
- sizeof (unsigned int));
- memcpy (cpy,
- &ksb->sblock,
- size - sizeof (GNUNET_EC_KBlock) - sizeof (unsigned int));
- for (i = 0; i < keywordCount; i++)
- {
- keyword = keywords[i];
- /* first character of keyword indicates
- mandatory or not -- ignore for hashing! */
- GNUNET_hash (&keyword[1], strlen (&keyword[1]), &hc);
- pk = GNUNET_RSA_create_key_from_hash (&hc);
- GNUNET_RSA_get_public_key (pk, &ksb->kblock.keyspace);
- GNUNET_GE_ASSERT (ectx,
- size - sizeof (GNUNET_EC_KBlock) -
- sizeof (unsigned int) ==
- sizeof (GNUNET_EC_SBlock) + mdsize +
- strlen (rootEntry) + 2);
- GNUNET_ECRS_encryptInPlace (&hc, &ksb->sblock,
- size - sizeof (GNUNET_EC_KBlock) -
- sizeof (unsigned int));
-
- GNUNET_GE_ASSERT (ectx,
- GNUNET_OK == GNUNET_RSA_sign (pk,
- size -
- sizeof
- (GNUNET_EC_KBlock) -
- sizeof (unsigned
- int),
- &ksb->sblock,
- &ksb->
- kblock.signature));
- /* extra check: verify sig */
- GNUNET_RSA_free_key (pk);
- if (GNUNET_OK != GNUNET_FS_insert (sock, knvalue))
- {
- GNUNET_GE_BREAK (ectx, 0);
- GNUNET_free (cpy);
- GNUNET_free (knvalue);
- GNUNET_free (value);
- GNUNET_client_connection_destroy (sock);
- GNUNET_RSA_free_key (namespace_priv_key);
- return NULL;
- }
- /* restore nblock to avoid re-encryption! */
- memcpy (&ksb->sblock,
- cpy,
- size - sizeof (GNUNET_EC_KBlock) - sizeof (unsigned int));
- }
- GNUNET_free (cpy);
- }
- rootURI = GNUNET_malloc (sizeof (URI));
- rootURI->type = sks;
- GNUNET_hash (&sb->subspace,
- sizeof (GNUNET_RSA_PublicKey), &rootURI->data.sks.namespace);
- rootURI->data.sks.identifier = GNUNET_strdup (rootEntry);
- GNUNET_free (knvalue);
- GNUNET_free (value);
- GNUNET_client_connection_destroy (sock);
- GNUNET_RSA_free_key (namespace_priv_key);
-
- return rootURI;
+ pc->ip (pc->ip_cls, nsn->id, nsn->uri, nsn->md, nsn->update);
+ return GNUNET_YES;
}
-static struct GNUNET_RSA_PrivateKey *
-read_namespace_key (struct GNUNET_GC_Configuration *cfg,
- const GNUNET_HashCode * pid)
+
+/**
+ * Closure for 'find_trees'.
+ */
+struct FindTreeClosure
{
- char *fileName;
- GNUNET_RSA_PrivateKeyEncoded *hke;
- struct GNUNET_RSA_PrivateKey *hk;
- char *dst;
- unsigned long long len;
-
- fileName = getPseudonymFileName (NULL, cfg, pid);
- if (GNUNET_OK != GNUNET_disk_file_size (NULL, fileName, &len, GNUNET_YES))
- {
- GNUNET_free (fileName);
- return NULL;
- }
- if (len < 2)
- {
- GNUNET_GE_LOG (NULL, GNUNET_GE_ERROR | GNUNET_GE_BULK | GNUNET_GE_USER,
- _("File `%s' does not contain a pseudonym.\n"),
- fileName);
- GNUNET_free (fileName);
- return NULL;
- }
- dst = GNUNET_malloc (len);
- len = GNUNET_disk_file_read (NULL, fileName, len, dst);
- hke = (GNUNET_RSA_PrivateKeyEncoded *) dst;
- if (ntohs (hke->len) != len)
- {
- GNUNET_GE_LOG (NULL, GNUNET_GE_ERROR | GNUNET_GE_BULK | GNUNET_GE_USER,
- _("Format of pseudonym `%s' is invalid.\n"), fileName);
- GNUNET_free (fileName);
- GNUNET_free (hke);
- return NULL;
- }
- GNUNET_free (fileName);
- hk = GNUNET_RSA_decode_key (hke);
- GNUNET_free (hke);
- return hk;
-}
+ /**
+ * Namespace we are operating on.
+ */
+ struct GNUNET_FS_Namespace *namespace;
+
+ /**
+ * Array with 'head's of TREEs.
+ */
+ struct NamespaceUpdateNode **tree_array;
+
+ /**
+ * Size of 'tree_array'
+ */
+ unsigned int tree_array_size;
+
+ /**
+ * Current generational ID used.
+ */
+ unsigned int nug;
+
+ /**
+ * Identifier for the current TREE, or UINT_MAX for none yet.
+ */
+ unsigned int id;
+};
/**
- * Add an entry into a namespace.
+ * Find all nodes reachable from the current node (including the
+ * current node itself). If they are in no tree, add them to the
+ * current one. If they are the head of another tree, merge the
+ * trees. If they are in the middle of another tree, let them be.
+ * We can tell that a node is already in an tree by checking if
+ * its 'nug' field is set to the current 'nug' value. It is the
+ * head of an tree if it is in the 'tree_array' under its respective
+ * 'tree_id'.
+ *
+ * In short, we're trying to find the smallest number of tree to
+ * cover a directed graph.
*
- * @param dstU to which URI should the namespace entry refer?
- * @param md what meta-data should be associated with the
- * entry?
- * @param thisId name of this entry in the namespace (keyword/identifier)
- * @param nextId name of the update for this entry (to be published in
- * the future; maybe NULL)
- * @param pid unique identifier of the namespace/pseudonym
- * @return URI on success, NULL on error
+ * @param cls closure (of type 'struct FindTreeClosure')
+ * @param key current key code
+ * @param value value in the hash map
+ * @return GNUNET_YES if we should continue to
+ * iterate,
+ * GNUNET_NO if not.
*/
-struct GNUNET_ECRS_URI *
-GNUNET_ECRS_namespace_add_content (struct GNUNET_GE_Context *ectx,
- struct GNUNET_GC_Configuration *cfg,
- const GNUNET_HashCode * pid,
- unsigned int anonymityLevel,
- unsigned int priority,
- GNUNET_CronTime expiration,
- const char *thisId,
- const char *nextId,
- const struct GNUNET_ECRS_URI *dstU,
- const struct GNUNET_MetaData *md)
+static int
+find_trees (void *cls, const GNUNET_HashCode * key, void *value)
{
- struct GNUNET_ECRS_URI *uri;
- struct GNUNET_ClientServerConnection *sock;
- GNUNET_DatastoreValue *value;
- unsigned int size;
- unsigned int mdsize;
- struct GNUNET_RSA_PrivateKey *hk;
- GNUNET_EC_SBlock *sb;
- char *dstURI;
- char *destPos;
- GNUNET_HashCode hc; /* hash of thisId = key */
- GNUNET_HashCode hc2; /* hash of hc = identifier */
- int ret;
- unsigned int nidlen;
-
- hk = read_namespace_key (cfg, pid);
- if (hk == NULL)
- return NULL;
-
- /* THEN: construct GNUNET_EC_SBlock */
- dstURI = GNUNET_ECRS_uri_to_string (dstU);
- mdsize = GNUNET_meta_data_get_serialized_size (md, GNUNET_SERIALIZE_PART);
- if (nextId == NULL)
- nextId = "";
- nidlen = strlen (nextId) + 1;
- size = mdsize + sizeof (GNUNET_EC_SBlock) + strlen (dstURI) + 1 + nidlen;
- if (size > MAX_SBLOCK_SIZE)
- {
- size = MAX_SBLOCK_SIZE;
- mdsize =
- size - (sizeof (GNUNET_EC_SBlock) + strlen (dstURI) + 1 + nidlen);
- }
- value = GNUNET_malloc (sizeof (GNUNET_DatastoreValue) + size);
- sb = (GNUNET_EC_SBlock *) & value[1];
- sb->type = htonl (GNUNET_ECRS_BLOCKTYPE_SIGNED);
- destPos = (char *) &sb[1];
- memcpy (destPos, nextId, nidlen);
- destPos += nidlen;
- memcpy (destPos, dstURI, strlen (dstURI) + 1);
- destPos += strlen (dstURI) + 1;
- mdsize = GNUNET_meta_data_serialize (ectx,
- md,
- destPos,
- mdsize, GNUNET_SERIALIZE_PART);
- if (mdsize == -1)
- {
- GNUNET_GE_BREAK (ectx, 0);
- GNUNET_free (dstURI);
- GNUNET_RSA_free_key (hk);
- GNUNET_free (value);
- return NULL;
- }
- size = sizeof (GNUNET_EC_SBlock) + mdsize + strlen (dstURI) + 1 + nidlen;
- value->size = htonl (sizeof (GNUNET_DatastoreValue) + size);
- value->type = htonl (GNUNET_ECRS_BLOCKTYPE_SIGNED);
- value->priority = htonl (priority);
- value->anonymity_level = htonl (anonymityLevel);
- value->expiration_time = GNUNET_htonll (expiration);
- GNUNET_hash (thisId, strlen (thisId), &hc);
- GNUNET_hash (&hc, sizeof (GNUNET_HashCode), &hc2);
- uri = GNUNET_malloc (sizeof (URI));
- uri->type = sks;
- GNUNET_RSA_get_public_key (hk, &sb->subspace);
- GNUNET_hash (&sb->subspace,
- sizeof (GNUNET_RSA_PublicKey), &uri->data.sks.namespace);
- GNUNET_GE_BREAK (ectx, 0 == memcmp (&uri->data.sks.namespace,
- pid, sizeof (GNUNET_HashCode)));
- uri->data.sks.identifier = GNUNET_strdup (thisId);
- GNUNET_hash_xor (&hc2, &uri->data.sks.namespace, &sb->identifier);
- GNUNET_ECRS_encryptInPlace (&hc, &sb[1], size - sizeof (GNUNET_EC_SBlock));
- GNUNET_GE_ASSERT (ectx,
- GNUNET_OK == GNUNET_RSA_sign (hk,
- size
- -
- sizeof
- (GNUNET_RSA_Signature) -
- sizeof
- (GNUNET_RSA_PublicKey) -
- sizeof (unsigned int),
- &sb->identifier,
- &sb->signature));
- GNUNET_RSA_free_key (hk);
- sock = GNUNET_client_connection_create (ectx, cfg);
- ret = GNUNET_FS_insert (sock, value);
- if (ret != GNUNET_OK)
- {
- GNUNET_free (uri);
- uri = NULL;
- }
- GNUNET_client_connection_destroy (sock);
- GNUNET_free (value);
- GNUNET_free (dstURI);
+ struct FindTreeClosure *fc = cls;
+ struct NamespaceUpdateNode *nsn = value;
+ GNUNET_HashCode hc;
- return uri;
+ if (nsn->nug == fc->nug)
+ {
+ if (nsn->tree_id == UINT_MAX)
+ return GNUNET_YES; /* circular */
+ GNUNET_assert (nsn->tree_id < fc->tree_array_size);
+ if (fc->tree_array[nsn->tree_id] != nsn)
+ return GNUNET_YES; /* part of "another" (directed) TREE,
+ * and not root of it, end trace */
+ if (nsn->tree_id == fc->id)
+ return GNUNET_YES; /* that's our own root (can this be?) */
+ /* merge existing TREE, we have a root for both */
+ fc->tree_array[nsn->tree_id] = NULL;
+ if (fc->id == UINT_MAX)
+ fc->id = nsn->tree_id; /* take over ID */
+ }
+ else
+ {
+ nsn->nug = fc->nug;
+ nsn->tree_id = UINT_MAX; /* mark as undef */
+ /* trace */
+ GNUNET_CRYPTO_hash (nsn->update, strlen (nsn->update), &hc);
+ GNUNET_CONTAINER_multihashmap_get_multiple (fc->namespace->update_map, &hc,
+ &find_trees, fc);
+ }
+ return GNUNET_YES;
}
-struct lNCLS
-{
- struct GNUNET_GE_Context *ectx;
- struct GNUNET_GC_Configuration *cfg;
- GNUNET_ECRS_NamespaceInfoProcessor cb;
- void *cls;
- int cnt;
-};
-static int
-processFile_ (void *cls, const char *fileName)
+/**
+ * List all of the identifiers in the namespace for which we could
+ * produce an update. Namespace updates form a graph where each node
+ * has a name. Each node can have any number of URI/meta-data entries
+ * which can each be linked to other nodes. Cycles are possible.
+ *
+ * Calling this function with "next_id" NULL will cause the library to
+ * call "ip" with a root for each strongly connected component of the
+ * graph (a root being a node from which all other nodes in the Tree
+ * are reachable).
+ *
+ * Calling this function with "next_id" being the name of a node will
+ * cause the library to call "ip" with all children of the node. Note
+ * that cycles within the final tree are possible (including self-loops).
+ * I know, odd definition of a tree, but the GUI will display an actual
+ * tree (GtkTreeView), so that's what counts for the term here.
+ *
+ * @param namespace namespace to inspect for updateable content
+ * @param next_id ID to look for; use NULL to look for tree roots
+ * @param ip function to call on each updateable identifier
+ * @param ip_cls closure for ip
+ */
+void
+GNUNET_FS_namespace_list_updateable (struct GNUNET_FS_Namespace *namespace,
+ const char *next_id,
+ GNUNET_FS_IdentifierProcessor ip,
+ void *ip_cls)
{
- struct lNCLS *c = cls;
- struct GNUNET_RSA_PrivateKey *hk;
- GNUNET_RSA_PrivateKeyEncoded *hke;
- char *dst;
- unsigned long long len;
- GNUNET_HashCode namespace;
- GNUNET_RSA_PublicKey pk;
- const char *name;
-
- if (GNUNET_OK !=
- GNUNET_disk_file_size (c->ectx, fileName, &len, GNUNET_YES))
- return GNUNET_OK;
- if (len < 2)
+ unsigned int i;
+ unsigned int nug;
+ GNUNET_HashCode hc;
+ struct NamespaceUpdateNode *nsn;
+ struct ProcessUpdateClosure pc;
+ struct FindTreeClosure fc;
+
+ if (namespace->update_nodes == NULL)
+ read_update_information_graph (namespace);
+ if (namespace->update_nodes == NULL)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "No updateable nodes found for ID `%s'\n", next_id);
+ return; /* no nodes */
+ }
+ if (namespace->update_map == NULL)
+ {
+ /* need to construct */
+ namespace->update_map =
+ GNUNET_CONTAINER_multihashmap_create (2 +
+ 3 * namespace->update_node_count /
+ 4);
+ for (i = 0; i < namespace->update_node_count; i++)
{
- GNUNET_GE_LOG (c->ectx,
- GNUNET_GE_ERROR | GNUNET_GE_BULK | GNUNET_GE_USER,
- _("Format of file `%s' is invalid, trying to remove.\n"),
- fileName);
- UNLINK (fileName);
- return GNUNET_OK;
+ nsn = namespace->update_nodes[i];
+ GNUNET_CRYPTO_hash (nsn->id, strlen (nsn->id), &hc);
+ GNUNET_CONTAINER_multihashmap_put (namespace->update_map, &hc, nsn,
+ GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
}
- dst = GNUNET_malloc (len);
- len = GNUNET_disk_file_read (c->ectx, fileName, len, dst);
- hke = (GNUNET_RSA_PrivateKeyEncoded *) dst;
- if (ntohs (hke->len) != len)
+ }
+ if (next_id != NULL)
+ {
+ GNUNET_CRYPTO_hash (next_id, strlen (next_id), &hc);
+ pc.ip = ip;
+ pc.ip_cls = ip_cls;
+ GNUNET_CONTAINER_multihashmap_get_multiple (namespace->update_map, &hc,
+ &process_update_node, &pc);
+ return;
+ }
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Calculating TREEs to find roots of update trees\n");
+ /* Find heads of TREEs in update graph */
+ nug = ++namespace->nug_gen;
+ fc.tree_array = NULL;
+ fc.tree_array_size = 0;
+
+ for (i = 0; i < namespace->update_node_count; i++)
+ {
+ nsn = namespace->update_nodes[i];
+ if (nsn->nug == nug)
{
- GNUNET_GE_LOG (c->ectx,
- GNUNET_GE_ERROR | GNUNET_GE_BULK | GNUNET_GE_USER,
- _("Format of file `%s' is invalid, trying to remove.\n"),
- fileName);
- UNLINK (fileName);
- GNUNET_free (hke);
- return GNUNET_OK;
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "TREE of node `%s' is %u\n", nsn->id,
+ nsn->nug);
+ continue; /* already placed in TREE */
}
- hk = GNUNET_RSA_decode_key (hke);
- GNUNET_free (hke);
- if (hk == NULL)
+ GNUNET_CRYPTO_hash (nsn->update, strlen (nsn->update), &hc);
+ nsn->nug = nug;
+ nsn->tree_id = UINT_MAX;
+ fc.id = UINT_MAX;
+ fc.nug = nug;
+ fc.namespace = namespace;
+ GNUNET_CONTAINER_multihashmap_get_multiple (namespace->update_map, &hc,
+ &find_trees, &fc);
+ if (fc.id == UINT_MAX)
{
- GNUNET_GE_LOG (c->ectx,
- GNUNET_GE_ERROR | GNUNET_GE_BULK | GNUNET_GE_USER,
- _("Format of file `%s' is invalid, trying to remove.\n"),
- fileName);
- UNLINK (fileName);
- GNUNET_GE_BREAK (c->ectx, 0);
- return GNUNET_SYSERR;
+ /* start new TREE */
+ for (fc.id = 0; fc.id < fc.tree_array_size; fc.id++)
+ {
+ if (fc.tree_array[fc.id] == NULL)
+ {
+ fc.tree_array[fc.id] = nsn;
+ nsn->tree_id = fc.id;
+ break;
+ }
+ }
+ if (fc.id == fc.tree_array_size)
+ {
+ GNUNET_array_append (fc.tree_array, fc.tree_array_size, nsn);
+ nsn->tree_id = fc.id;
+ }
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "Starting new TREE %u with node `%s'\n", nsn->tree_id,
+ nsn->id);
+ /* put all nodes with same identifier into this TREE */
+ GNUNET_CRYPTO_hash (nsn->id, strlen (nsn->id), &hc);
+ fc.id = nsn->tree_id;
+ fc.nug = nug;
+ fc.namespace = namespace;
+ GNUNET_CONTAINER_multihashmap_get_multiple (namespace->update_map, &hc,
+ &find_trees, &fc);
}
- GNUNET_RSA_get_public_key (hk, &pk);
- GNUNET_RSA_free_key (hk);
- GNUNET_hash (&pk, sizeof (GNUNET_RSA_PublicKey), &namespace);
- if (NULL != c->cb)
+ else
{
- name = fileName;
- while (NULL != strstr (name, DIR_SEPARATOR_STR))
- name = 1 + strstr (name, DIR_SEPARATOR_STR);
- if (GNUNET_OK == c->cb (&namespace, name, c->cls))
- c->cnt++;
- else
- c->cnt = GNUNET_SYSERR;
+ /* make head of TREE "id" */
+ fc.tree_array[fc.id] = nsn;
+ nsn->tree_id = fc.id;
}
- else
- c->cnt++;
- return GNUNET_OK;
-}
-
-/**
- * Build a list of all available namespaces
- *
- * @param list where to store the names (is allocated, caller frees)
- * @return GNUNET_SYSERR on error, otherwise the number of pseudonyms in list
- */
-int
-GNUNET_ECRS_get_namespaces (struct GNUNET_GE_Context *ectx,
- struct GNUNET_GC_Configuration *cfg,
- GNUNET_ECRS_NamespaceInfoProcessor cb, void *cls)
-{
- char *dirName;
- struct lNCLS myCLS;
-
- myCLS.cls = cls;
- myCLS.cb = cb;
- myCLS.cnt = 0;
- myCLS.ectx = ectx;
- myCLS.cfg = cfg;
- dirName = getPseudonymFileName (ectx, cfg, NULL);
- GNUNET_disk_directory_scan (ectx, dirName, &processFile_, &myCLS);
- GNUNET_free (dirName);
- return myCLS.cnt;
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "TREE of node `%s' is %u\n", nsn->id,
+ fc.id);
+ }
+ for (i = 0; i < fc.tree_array_size; i++)
+ {
+ nsn = fc.tree_array[i];
+ if (NULL != nsn)
+ {
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Root of TREE %u is node `%s'\n", i,
+ nsn->id);
+ ip (ip_cls, nsn->id, nsn->uri, nsn->md, nsn->update);
+ }
+ }
+ GNUNET_array_grow (fc.tree_array, fc.tree_array_size, 0);
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Done processing TREEs\n");
}
-
-/* end of namespace.c */
-#endif
+/* end of fs_namespace.c */
projects / oweals / gnunet.git / blobdiff