/*
This file is part of GNUnet
- (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010 Christian Grothoff (and other contributing authors)
+ (C) 2003-2013 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 License as published
/**
* @file fs/fs_namespace.c
- * @brief create and destroy namespaces
+ * @brief publishing to namespaces, and tracking updateable entries
+ * for our namespaces
* @author Christian Grothoff
*/
#include "platform.h"
#include "gnunet_signatures.h"
#include "gnunet_util_lib.h"
#include "gnunet_fs_service.h"
-#include "fs.h"
+#include "fs_api.h"
+#include "fs_publish_ublock.h"
-#define DEBUG_NAMESPACE GNUNET_NO
/**
- * Return the name of the directory in which we store
- * our local namespaces (or rather, their public keys).
- *
- * @param h global fs handle
- * @return NULL on error, otherwise the name of the directory
+ * Information about an (updateable) node in the
+ * namespace.
*/
-static char *
-get_namespace_directory (struct GNUNET_FS_Handle *h)
+struct NamespaceUpdateNode
{
- char *dn;
+ /**
+ * Identifier for this node.
+ */
+ char *id;
- 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;
-}
+ /**
+ * Identifier of children of this node.
+ */
+ char *update;
+
+ /**
+ * Metadata for this entry.
+ */
+ struct GNUNET_CONTAINER_MetaData *md;
+
+ /**
+ * URI of this entry in the namespace.
+ */
+ struct GNUNET_FS_Uri *uri;
+
+ /**
+ * Namespace update generation ID. Used to ensure
+ * freshness of the tree_id.
+ */
+ unsigned int nug;
+
+ /**
+ * TREE this entry belongs to (if nug is current).
+ */
+ unsigned int tree_id;
+
+};
+
+
+/**
+ * Handle to update information for a namespace.
+ */
+struct GNUNET_FS_UpdateInformationGraph
+{
+
+ /**
+ * Handle to the FS service context.
+ */
+ struct GNUNET_FS_Handle *h;
+
+ /**
+ * Array with information about nodes in the namespace.
+ */
+ struct NamespaceUpdateNode **update_nodes;
+
+ /**
+ * Private key for the namespace.
+ */
+ struct GNUNET_CRYPTO_EccPrivateKey ns;
+
+ /**
+ * Hash map mapping identifiers of update nodes
+ * to the update nodes (initialized on-demand).
+ */
+ struct GNUNET_CONTAINER_MultiHashMap *update_map;
+
+ /**
+ * Size of the update nodes array.
+ */
+ unsigned int update_node_count;
+
+ /**
+ * Reference counter.
+ */
+ unsigned int rc;
+
+ /**
+ * Generator for unique nug numbers.
+ */
+ unsigned int nug_gen;
+};
/**
* Return the name of the directory in which we store
* the update information graph for the given local namespace.
*
+ * @param h file-sharing handle
* @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)
+get_update_information_directory (struct GNUNET_FS_Handle *h,
+ const struct GNUNET_CRYPTO_EccPrivateKey *ns)
{
char *dn;
char *ret;
+ struct GNUNET_CRYPTO_EccPublicSignKey pub;
+ struct GNUNET_HashCode hc;
+ struct GNUNET_CRYPTO_HashAsciiEncoded enc;
if (GNUNET_OK !=
- GNUNET_CONFIGURATION_get_value_filename (ns->h->cfg, "FS", "UPDATE_DIR",
+ GNUNET_CONFIGURATION_get_value_filename (h->cfg, "FS", "UPDATE_DIR",
&dn))
{
- GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
- _("Configuration fails to specify `%s' in section `%s'\n"),
- "UPDATE_DIR", "fs");
+ GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR,
+ "fs", "UPDATE_DIR");
return NULL;
}
- GNUNET_asprintf (&ret, "%s%s%s", dn, DIR_SEPARATOR_STR, ns->name);
+ GNUNET_CRYPTO_ecc_key_get_public_for_signature (ns, &pub);
+ GNUNET_CRYPTO_hash (&pub, sizeof (pub), &hc);
+ GNUNET_CRYPTO_hash_to_enc (&hc,
+ &enc);
+ GNUNET_asprintf (&ret, "%s%s%s",
+ dn,
+ DIR_SEPARATOR_STR,
+ (const char *) enc.encoding);
GNUNET_free (dn);
return ret;
}
/**
- * Write the namespace update node graph to a file.
+ * Release memory occupied by UIG datastructure.
+ *
+ * @param uig data structure to free
+ */
+static void
+free_update_information_graph (struct GNUNET_FS_UpdateInformationGraph *uig)
+{
+ unsigned int i;
+ struct NamespaceUpdateNode *nsn;
+
+ for (i = 0; i < uig->update_node_count; i++)
+ {
+ nsn = uig->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 (uig->update_nodes, uig->update_node_count,
+ 0);
+ if (NULL != uig->update_map)
+ GNUNET_CONTAINER_multihashmap_destroy (uig->update_map);
+ GNUNET_free (uig);
+}
+
+
+/**
+ * Write a namespace's update node graph to a file.
*
- * @param ns namespace to dump
+ * @param uig update information graph to dump
*/
static void
-write_update_information_graph (struct GNUNET_FS_Namespace *ns)
+write_update_information_graph (struct GNUNET_FS_UpdateInformationGraph *uig)
{
char *fn;
struct GNUNET_BIO_WriteHandle *wh;
struct NamespaceUpdateNode *n;
char *uris;
- fn = get_update_information_directory (ns);
+ fn = get_update_information_directory (uig->h,
+ &uig->ns);
wh = GNUNET_BIO_write_open (fn);
- if (wh == NULL)
+ if (NULL == wh)
{
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))
+ if (GNUNET_OK != GNUNET_BIO_write_int32 (wh, uig->update_node_count))
goto END;
- for (i = 0; i < ns->update_node_count; i++)
+ for (i = 0; i < uig->update_node_count; i++)
{
- n = ns->update_nodes[i];
+ n = uig->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)) ||
/**
* Read the namespace update node graph from a file.
*
+ * @param h FS handle to use
* @param ns namespace to read
+ * @return update graph, never NULL
*/
-static void
-read_update_information_graph (struct GNUNET_FS_Namespace *ns)
+static struct GNUNET_FS_UpdateInformationGraph *
+read_update_information_graph (struct GNUNET_FS_Handle *h,
+ const struct GNUNET_CRYPTO_EccPrivateKey *ns)
{
+ struct GNUNET_FS_UpdateInformationGraph *uig;
char *fn;
struct GNUNET_BIO_ReadHandle *rh;
unsigned int i;
uint32_t count;
char *emsg;
- fn = get_update_information_directory (ns);
+ uig = GNUNET_new (struct GNUNET_FS_UpdateInformationGraph);
+ uig->h = h;
+ uig->ns = *ns;
+ fn = get_update_information_directory (h, ns);
if (GNUNET_YES != GNUNET_DISK_file_test (fn))
{
GNUNET_free (fn);
- return;
+ return uig;
}
rh = GNUNET_BIO_read_open (fn);
- if (rh == NULL)
+ if (NULL == rh)
{
GNUNET_free (fn);
- return;
+ return uig;
}
if (GNUNET_OK != GNUNET_BIO_read_int32 (rh, &count))
{
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 *));
+ if (0 == count)
+ goto END;
+ uig->update_nodes =
+ GNUNET_malloc (count * sizeof (struct NamespaceUpdateNode *));
for (i = 0; i < count; i++)
{
- n = GNUNET_malloc (sizeof (struct NamespaceUpdateNode));
+ n = GNUNET_new (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_free (n);
break;
}
- ns->update_nodes[i] = n;
+ uig->update_nodes[i] = n;
}
- ns->update_node_count = i;
-END:
+ uig->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_log (GNUNET_ERROR_TYPE_ERROR, _("Failed to read `%s': %s\n"),
+ fn, emsg);
GNUNET_free (emsg);
}
GNUNET_free (fn);
+ return uig;
}
-/**
- * Context for advertising a namespace.
- */
-struct AdvertisementContext
-{
- /**
- * Function to call with the result.
- */
- GNUNET_FS_PublishContinuation cont;
-
- /**
- * Closure for cont.
- */
- void *cont_cls;
-
- /**
- * Datastore handle.
- */
- struct GNUNET_DATASTORE_Handle *dsh;
-
- /**
- * Our KSK URI.
- */
- struct GNUNET_FS_Uri *ksk_uri;
-
- /**
- * Plaintext.
- */
- char *pt;
-
- /**
- * NBlock to sign and store.
- */
- struct NBlock *nb;
-
- /**
- * The namespace.
- */
- struct GNUNET_FS_Namespace *ns;
-
- /**
- * Block options.
- */
- struct GNUNET_FS_BlockOptions bo;
-
- /**
- * Number of bytes of plaintext.
- */
- size_t pt_size;
-
- /**
- * Current keyword offset.
- */
- unsigned int pos;
-};
-
-
-/**
- * Disconnect from the datastore.
- *
- * @param cls datastore handle
- * @param tc scheduler context
- */
-static void
-do_disconnect (void *cls, const struct GNUNET_SCHEDULER_TaskContext *tc)
-{
- struct GNUNET_DATASTORE_Handle *dsh = cls;
-
- GNUNET_DATASTORE_disconnect (dsh, GNUNET_NO);
-}
-
-
-/**
- * Continuation called to notify client about result of the
- * operation.
- *
- * @param cls closure (our struct AdvertismentContext)
- * @param success GNUNET_SYSERR on failure
- * @param msg NULL on success, otherwise an error message
- */
-static void
-advertisement_cont (void *cls, int success, const char *msg)
-{
- struct AdvertisementContext *ac = cls;
- const char *keyword;
- GNUNET_HashCode key;
- GNUNET_HashCode query;
- struct GNUNET_CRYPTO_AesSessionKey skey;
- struct GNUNET_CRYPTO_AesInitializationVector iv;
- struct GNUNET_CRYPTO_RsaPrivateKey *pk;
-
- if (GNUNET_OK != success)
- {
- /* error! */
- GNUNET_SCHEDULER_add_continuation (&do_disconnect, ac->dsh,
- GNUNET_SCHEDULER_REASON_PREREQ_DONE);
- if (msg == NULL)
- {
- GNUNET_break (0);
- msg = _("Unknown error");
- }
- if (ac->cont != NULL)
- ac->cont (ac->cont_cls, NULL, msg);
- GNUNET_FS_uri_destroy (ac->ksk_uri);
- GNUNET_free (ac->pt);
- GNUNET_free (ac->nb);
- GNUNET_FS_namespace_delete (ac->ns, GNUNET_NO);
- GNUNET_free (ac);
- return;
- }
- if (ac->pos == ac->ksk_uri->data.ksk.keywordCount)
- {
- /* done! */
- GNUNET_SCHEDULER_add_continuation (&do_disconnect, ac->dsh,
- GNUNET_SCHEDULER_REASON_PREREQ_DONE);
- if (ac->cont != NULL)
- ac->cont (ac->cont_cls, ac->ksk_uri, NULL);
- GNUNET_FS_uri_destroy (ac->ksk_uri);
- GNUNET_free (ac->pt);
- GNUNET_free (ac->nb);
- GNUNET_FS_namespace_delete (ac->ns, GNUNET_NO);
- GNUNET_free (ac);
- return;
- }
- keyword = ac->ksk_uri->data.ksk.keywords[ac->pos++];
- /* first character of keyword indicates if it is
- * mandatory or not -- ignore for hashing */
- GNUNET_CRYPTO_hash (&keyword[1], strlen (&keyword[1]), &key);
- GNUNET_CRYPTO_hash_to_aes_key (&key, &skey, &iv);
- GNUNET_CRYPTO_aes_encrypt (ac->pt, ac->pt_size, &skey, &iv, &ac->nb[1]);
- GNUNET_break (GNUNET_OK ==
- GNUNET_CRYPTO_rsa_sign (ac->ns->key, &ac->nb->ns_purpose,
- &ac->nb->ns_signature));
- pk = GNUNET_CRYPTO_rsa_key_create_from_hash (&key);
- GNUNET_assert (pk != NULL);
- GNUNET_CRYPTO_rsa_key_get_public (pk, &ac->nb->keyspace);
- GNUNET_CRYPTO_hash (&ac->nb->keyspace,
- sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded),
- &query);
- GNUNET_break (GNUNET_OK ==
- GNUNET_CRYPTO_rsa_sign (pk, &ac->nb->ksk_purpose,
- &ac->nb->ksk_signature));
- GNUNET_CRYPTO_rsa_key_free (pk);
- GNUNET_DATASTORE_put (ac->dsh, 0 /* no reservation */ ,
- &query, ac->pt_size + sizeof (struct NBlock), ac->nb,
- GNUNET_BLOCK_TYPE_FS_NBLOCK, ac->bo.content_priority,
- ac->bo.anonymity_level, ac->bo.replication_level,
- ac->bo.expiration_time, -2, 1,
- GNUNET_CONSTANTS_SERVICE_TIMEOUT, &advertisement_cont,
- ac);
-}
-
-
-/**
- * Publish an advertismement for a namespace.
- *
- * @param h handle to the file sharing subsystem
- * @param ksk_uri keywords to use for advertisment
- * @param namespace handle for the namespace that should be advertised
- * @param meta meta-data for the namespace advertisement
- * @param bo block options
- * @param rootEntry name of the root of the namespace
- * @param cont continuation
- * @param cont_cls closure for cont
- */
-void
-GNUNET_FS_namespace_advertise (struct GNUNET_FS_Handle *h,
- struct GNUNET_FS_Uri *ksk_uri,
- struct GNUNET_FS_Namespace *namespace,
- const struct GNUNET_CONTAINER_MetaData *meta,
- const struct GNUNET_FS_BlockOptions *bo,
- const char *rootEntry,
- GNUNET_FS_PublishContinuation cont,
- void *cont_cls)
-{
- size_t reslen;
- size_t size;
- ssize_t mdsize;
- struct NBlock *nb;
- char *mdst;
- struct GNUNET_DATASTORE_Handle *dsh;
- struct AdvertisementContext *ctx;
- char *pt;
-
- /* create advertisements */
- mdsize = GNUNET_CONTAINER_meta_data_get_serialized_size (meta);
- if (-1 == mdsize)
- {
- cont (cont_cls, NULL, _("Failed to serialize meta data"));
- return;
- }
- reslen = strlen (rootEntry) + 1;
- size = mdsize + sizeof (struct NBlock) + reslen;
- if (size > MAX_NBLOCK_SIZE)
- {
- size = MAX_NBLOCK_SIZE;
- mdsize = size - sizeof (struct NBlock) - reslen;
- }
-
- pt = GNUNET_malloc (mdsize + reslen);
- memcpy (pt, rootEntry, reslen);
- mdst = &pt[reslen];
- mdsize =
- GNUNET_CONTAINER_meta_data_serialize (meta, &mdst, mdsize,
- GNUNET_CONTAINER_META_DATA_SERIALIZE_PART);
- if (mdsize == -1)
- {
- GNUNET_break (0);
- GNUNET_free (pt);
- cont (cont_cls, NULL, _("Failed to serialize meta data"));
- return;
- }
- size = mdsize + sizeof (struct NBlock) + reslen;
- nb = GNUNET_malloc (size);
- GNUNET_CRYPTO_rsa_key_get_public (namespace->key, &nb->subspace);
- nb->ns_purpose.size =
- htonl (mdsize + reslen +
- sizeof (struct GNUNET_CRYPTO_RsaSignaturePurpose) +
- sizeof (struct GNUNET_CRYPTO_RsaPublicKeyBinaryEncoded));
- nb->ns_purpose.purpose = htonl (GNUNET_SIGNATURE_PURPOSE_FS_NBLOCK);
- nb->ksk_purpose.size =
- htonl (size - sizeof (struct GNUNET_CRYPTO_RsaSignature));
- nb->ksk_purpose.purpose = htonl (GNUNET_SIGNATURE_PURPOSE_FS_NBLOCK_KSIG);
- dsh = GNUNET_DATASTORE_connect (h->cfg);
- if (NULL == dsh)
- {
- GNUNET_free (nb);
- GNUNET_free (pt);
- cont (cont_cls, NULL, _("Failed to connect to datastore service"));
- return;
- }
- ctx = GNUNET_malloc (sizeof (struct AdvertisementContext));
- ctx->cont = cont;
- ctx->cont_cls = cont_cls;
- ctx->dsh = dsh;
- ctx->ksk_uri = GNUNET_FS_uri_dup (ksk_uri);
- ctx->nb = nb;
- ctx->pt = pt;
- ctx->pt_size = mdsize + reslen;
- ctx->ns = namespace;
- ctx->ns->rc++;
- ctx->bo = *bo;
- advertisement_cont (ctx, GNUNET_OK, NULL);
-}
-
-
-/**
- * Create a namespace with the given name; if one already
- * exists, return a handle to the existing namespace.
- *
- * @param h handle to the file sharing subsystem
- * @param name name to use for the 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)
-{
- 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;
-}
-
-
-/**
- * Delete a namespace handle. Can be used for a clean shutdown (free
- * memory) or also to freeze the namespace to prevent further
- * insertions by anyone.
- *
- * @param namespace handle to the namespace that should be deleted / freed
- * @param freeze prevents future insertions; creating a namespace
- * with the same name again will create a fresh namespace instead
- *
- * @return GNUNET_OK on success, GNUNET_SYSERR on error
- */
-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)
- {
- 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)
-{
- 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;
-}
-
-
-/**
- * Build a list of all available local (!) namespaces The returned
- * names are only the nicknames since we only iterate over the local
- * namespaces.
- *
- * @param h handle to the file sharing subsystem
- * @param cb function to call on each known namespace
- * @param cb_cls closure for cb
- */
-void
-GNUNET_FS_namespace_list (struct GNUNET_FS_Handle *h,
- 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);
-}
-
-
-
-
/**
* Context for the SKS publication.
*/
-struct PublishSksContext
+struct GNUNET_FS_PublishSksContext
{
/**
/**
* Namespace we're publishing to.
*/
- struct GNUNET_FS_Namespace *namespace;
+ struct GNUNET_CRYPTO_EccPrivateKey ns;
/**
* Handle to the datastore.
*/
struct GNUNET_DATASTORE_Handle *dsh;
+ /**
+ * Handle to FS.
+ */
+ struct GNUNET_FS_Handle *h;
+
/**
* Function to call once we're done.
*/
*/
void *cont_cls;
+ /**
+ * Handle for our UBlock operation request.
+ */
+ struct GNUNET_FS_PublishUblockContext *uc;
};
/**
- * Function called by the datastore API with
- * the result from the PUT (SBlock) request.
+ * Function called by the UBlock construction with
+ * the result from the PUT (UBlock) request.
*
- * @param cls closure of type "struct PublishSksContext*"
- * @param success GNUNET_OK on success
+ * @param cls closure of type "struct GNUNET_FS_PublishSksContext*"
* @param msg error message (or NULL)
*/
static void
-sb_put_cont (void *cls, int success, const char *msg)
+sks_publish_cont (void *cls,
+ const char *msg)
{
- struct PublishSksContext *psc = cls;
- GNUNET_HashCode hc;
+ struct GNUNET_FS_PublishSksContext *psc = cls;
+ struct GNUNET_FS_UpdateInformationGraph *uig;
- if (NULL != psc->dsh)
- {
- GNUNET_DATASTORE_disconnect (psc->dsh, GNUNET_NO);
- psc->dsh = NULL;
- }
- if (GNUNET_OK != success)
+ psc->uc = NULL;
+ if (NULL != msg)
{
- if (psc->cont != NULL)
+ if (NULL != psc->cont)
psc->cont (psc->cont_cls, NULL, msg);
+ GNUNET_FS_publish_sks_cancel (psc);
+ return;
}
- else
- {
- if (psc->nsn != NULL)
- {
- /* 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_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);
- }
- psc->nsn = NULL;
- write_update_information_graph (psc->namespace);
- }
- if (psc->cont != NULL)
- psc->cont (psc->cont_cls, psc->uri, NULL);
- }
- GNUNET_FS_namespace_delete (psc->namespace, GNUNET_NO);
- GNUNET_FS_uri_destroy (psc->uri);
- if (psc->nsn != NULL)
- {
- 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);
+ if (NULL != psc->nsn)
+ {
+ /* FIXME: this can be done much more
+ * efficiently by simply appending to the
+ * file and overwriting the 4-byte header */
+ uig = read_update_information_graph (psc->h,
+ &psc->ns);
+ GNUNET_array_append (uig->update_nodes,
+ uig->update_node_count,
+ psc->nsn);
+ psc->nsn = NULL;
+ write_update_information_graph (uig);
+ free_update_information_graph (uig);
+ }
+ if (NULL != psc->cont)
+ psc->cont (psc->cont_cls, psc->uri, NULL);
+ GNUNET_FS_publish_sks_cancel (psc);
}
* Publish an SBlock on GNUnet.
*
* @param h handle to the file sharing subsystem
- * @param namespace namespace to publish in
+ * @param ns namespace to publish in
* @param identifier identifier to use
* @param update update identifier to use
* @param meta metadata to use
* @param options publication options
* @param cont continuation
* @param cont_cls closure for cont
+ * @return NULL on error ('cont' will still be called)
*/
-void
+struct GNUNET_FS_PublishSksContext *
GNUNET_FS_publish_sks (struct GNUNET_FS_Handle *h,
- struct GNUNET_FS_Namespace *namespace,
+ const struct GNUNET_CRYPTO_EccPrivateKey *ns,
const char *identifier, const char *update,
const struct GNUNET_CONTAINER_MetaData *meta,
const struct GNUNET_FS_Uri *uri,
enum GNUNET_FS_PublishOptions options,
GNUNET_FS_PublishContinuation cont, void *cont_cls)
{
- struct PublishSksContext *psc;
- struct GNUNET_CRYPTO_AesSessionKey sk;
- struct GNUNET_CRYPTO_AesInitializationVector iv;
+ struct GNUNET_FS_PublishSksContext *psc;
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);
- cont (cont_cls, NULL, _("Internal error."));
- return;
- }
- 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 = GNUNET_new (struct GNUNET_FS_Uri);
+ sks_uri->type = GNUNET_FS_URI_SKS;
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 PublishSksContext));
+ GNUNET_CRYPTO_ecc_key_get_public_for_signature (ns,
+ &sks_uri->data.sks.ns);
+
+ psc = GNUNET_new (struct GNUNET_FS_PublishSksContext);
+ psc->h = h;
psc->uri = sks_uri;
psc->cont = cont;
- psc->namespace = namespace;
- namespace->rc++;
psc->cont_cls = cont_cls;
- if (0 != (options & GNUNET_FS_PUBLISH_OPTION_SIMULATE_ONLY))
+ psc->ns = *ns;
+ if (0 == (options & GNUNET_FS_PUBLISH_OPTION_SIMULATE_ONLY))
{
- GNUNET_free (sb_enc);
- GNUNET_free (sb);
- sb_put_cont (psc, GNUNET_OK, NULL);
- return;
- }
- psc->dsh = GNUNET_DATASTORE_connect (h->cfg);
- if (NULL == psc->dsh)
- {
- GNUNET_free (sb_enc);
- GNUNET_free (sb);
- sb_put_cont (psc, GNUNET_NO, _("Failed to connect to datastore."));
- return;
+ psc->dsh = GNUNET_DATASTORE_connect (h->cfg);
+ if (NULL == psc->dsh)
+ {
+ sks_publish_cont (psc,
+ _("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 = GNUNET_new (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);
}
- 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);
+ psc->uc = GNUNET_FS_publish_ublock_ (h,
+ psc->dsh,
+ identifier,
+ update,
+ ns,
+ meta,
+ uri,
+ bo,
+ options,
+ &sks_publish_cont,
+ psc);
+ return psc;
+}
+
+
+/**
+ * Abort the SKS publishing operation.
+ *
+ * @param psc context of the operation to abort.
+ */
+void
+GNUNET_FS_publish_sks_cancel (struct GNUNET_FS_PublishSksContext *psc)
+{
+ if (NULL != psc->uc)
+ {
+ GNUNET_FS_publish_ublock_cancel_ (psc->uc);
+ psc->uc = NULL;
+ }
+ if (NULL != psc->dsh)
+ {
+ GNUNET_DATASTORE_disconnect (psc->dsh, GNUNET_NO);
+ psc->dsh = NULL;
+ }
+ 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);
}
* GNUNET_NO if not.
*/
static int
-process_update_node (void *cls, const GNUNET_HashCode * key, void *value)
+process_update_node (void *cls,
+ const struct GNUNET_HashCode *key,
+ void *value)
{
struct ProcessUpdateClosure *pc = cls;
struct NamespaceUpdateNode *nsn = value;
- pc->ip (pc->ip_cls, nsn->id, nsn->uri, nsn->md, nsn->update);
+ pc->ip (pc->ip_cls,
+ nsn->id,
+ nsn->uri,
+ nsn->md,
+ nsn->update);
return GNUNET_YES;
}
struct FindTreeClosure
{
/**
- * Namespace we are operating on.
+ * UIG we are operating on.
*/
- struct GNUNET_FS_Namespace *namespace;
+ struct GNUNET_FS_UpdateInformationGraph *uig;
/**
* Array with 'head's of TREEs.
* GNUNET_NO if not.
*/
static int
-find_trees (void *cls, const GNUNET_HashCode * key, void *value)
+find_trees (void *cls,
+ const struct GNUNET_HashCode *key,
+ void *value)
{
struct FindTreeClosure *fc = cls;
struct NamespaceUpdateNode *nsn = value;
- GNUNET_HashCode hc;
+ struct GNUNET_HashCode hc;
if (nsn->nug == fc->nug)
{
- if (nsn->tree_id == UINT_MAX)
+ if (UINT_MAX == nsn->tree_id)
return GNUNET_YES; /* circular */
GNUNET_assert (nsn->tree_id < fc->tree_array_size);
if (fc->tree_array[nsn->tree_id] != nsn)
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)
+ if (UINT_MAX == fc->id)
fc->id = nsn->tree_id; /* take over ID */
}
else
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,
+ GNUNET_CONTAINER_multihashmap_get_multiple (fc->uig->update_map, &hc,
&find_trees, fc);
}
return GNUNET_YES;
* 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 h fs handle to use
+ * @param ns 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,
+GNUNET_FS_namespace_list_updateable (struct GNUNET_FS_Handle *h,
+ const struct GNUNET_CRYPTO_EccPrivateKey *ns,
const char *next_id,
GNUNET_FS_IdentifierProcessor ip,
void *ip_cls)
{
unsigned int i;
unsigned int nug;
- GNUNET_HashCode hc;
+ struct GNUNET_HashCode hc;
struct NamespaceUpdateNode *nsn;
struct ProcessUpdateClosure pc;
struct FindTreeClosure fc;
+ struct GNUNET_FS_UpdateInformationGraph *uig;
- if (namespace->update_nodes == NULL)
- read_update_information_graph (namespace);
- if (namespace->update_nodes == NULL)
+ uig = read_update_information_graph (h, ns);
+ if (NULL == uig->update_nodes)
{
-#if DEBUG_NAMESPACE
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"No updateable nodes found for ID `%s'\n", next_id);
-#endif
+ free_update_information_graph (uig);
return; /* no nodes */
}
- if (namespace->update_map == NULL)
+ uig->update_map =
+ GNUNET_CONTAINER_multihashmap_create (2 +
+ 3 * uig->update_node_count /
+ 4,
+ GNUNET_NO);
+ for (i = 0; i < uig->update_node_count; i++)
{
- /* 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++)
- {
- 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);
- }
+ nsn = uig->update_nodes[i];
+ GNUNET_CRYPTO_hash (nsn->id, strlen (nsn->id), &hc);
+ GNUNET_CONTAINER_multihashmap_put (uig->update_map, &hc, nsn,
+ GNUNET_CONTAINER_MULTIHASHMAPOPTION_MULTIPLE);
}
- if (next_id != NULL)
+ if (NULL != next_id)
{
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,
+ GNUNET_CONTAINER_multihashmap_get_multiple (uig->update_map, &hc,
&process_update_node, &pc);
+ free_update_information_graph (uig);
return;
}
-#if DEBUG_NAMESPACE
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Calculating TREEs to find roots of update trees\n");
-#endif
/* Find heads of TREEs in update graph */
- nug = ++namespace->nug_gen;
+ nug = ++uig->nug_gen;
fc.tree_array = NULL;
fc.tree_array_size = 0;
- for (i = 0; i < namespace->update_node_count; i++)
+ for (i = 0; i < uig->update_node_count; i++)
{
- nsn = namespace->update_nodes[i];
+ nsn = uig->update_nodes[i];
if (nsn->nug == nug)
{
-#if DEBUG_NAMESPACE
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "TREE of node `%s' is %u\n", nsn->id,
nsn->nug);
-#endif
continue; /* already placed in TREE */
}
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,
+ fc.uig = uig;
+ GNUNET_CONTAINER_multihashmap_get_multiple (uig->update_map, &hc,
&find_trees, &fc);
- if (fc.id == UINT_MAX)
+ if (UINT_MAX == fc.id)
{
/* start new TREE */
for (fc.id = 0; fc.id < fc.tree_array_size; fc.id++)
{
- if (fc.tree_array[fc.id] == NULL)
+ if (NULL == fc.tree_array[fc.id])
{
fc.tree_array[fc.id] = nsn;
nsn->tree_id = fc.id;
GNUNET_array_append (fc.tree_array, fc.tree_array_size, nsn);
nsn->tree_id = fc.id;
}
-#if DEBUG_NAMESPACE
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"Starting new TREE %u with node `%s'\n", nsn->tree_id,
nsn->id);
-#endif
/* 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,
+ fc.uig = uig;
+ GNUNET_CONTAINER_multihashmap_get_multiple (uig->update_map, &hc,
&find_trees, &fc);
}
else
fc.tree_array[fc.id] = nsn;
nsn->tree_id = fc.id;
}
-#if DEBUG_NAMESPACE
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "TREE of node `%s' is %u\n", nsn->id,
+ GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
+ "TREE of node `%s' is %u\n", nsn->id,
fc.id);
-#endif
}
for (i = 0; i < fc.tree_array_size; i++)
{
nsn = fc.tree_array[i];
if (NULL != nsn)
{
-#if DEBUG_NAMESPACE
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Root of TREE %u is node `%s'\n", i,
nsn->id);
-#endif
-
ip (ip_cls, nsn->id, nsn->uri, nsn->md, nsn->update);
}
}
GNUNET_array_grow (fc.tree_array, fc.tree_array_size, 0);
-#if DEBUG_NAMESPACE
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "Done processing TREEs\n");
-#endif
+ free_update_information_graph (uig);
}
projects / oweals / gnunet.git / blobdiff