#include "gnunet_fs_service.h"
#include "fs_api.h"
-#define DEBUG_NAMESPACE GNUNET_EXTRA_LOGGING
-
/**
* Maximum legal size for an sblock.
*/
#define MAX_SBLOCK_SIZE (60 * 1024)
-/**
- * Maximum legal size for an nblock.
- */
-#define MAX_NBLOCK_SIZE (60 * 1024)
-
/**
* Return the name of the directory in which we store
}
-/**
- * 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 min_expiration minimum expiration time required for content to be stored
- * @param msg NULL on success, otherwise an error message
- */
-static void
-advertisement_cont (void *cls, int success,
- struct GNUNET_TIME_Absolute min_expiration,
- 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, GNUNET_TIME_UNIT_ZERO_ABS, NULL);
-}
/**
}
+/**
+ * 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)
+{
+ ns->rc++;
+ return ns;
+}
+
+
/**
* Delete a namespace handle. Can be used for a clean shutdown (free
* memory) or also to freeze the namespace to prevent further
GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_ERROR, "unlink",
namespace->filename);
}
- if (0 == namespace->rc)
+ 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++)
{
- 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);
- }
+ 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 SKS publication.
*/
-struct PublishSksContext
+struct GNUNET_FS_PublishSksContext
{
/**
*/
void *cont_cls;
+ /**
+ * Handle for our datastore request.
+ */
+ struct GNUNET_DATASTORE_QueueEntry *dqe;
};
* Function called by the datastore API with
* the result from the PUT (SBlock) request.
*
- * @param cls closure of type "struct PublishSksContext*"
+ * @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)
struct GNUNET_TIME_Absolute min_expiration,
const char *msg)
{
- struct PublishSksContext *psc = cls;
+ struct GNUNET_FS_PublishSksContext *psc = cls;
GNUNET_HashCode hc;
- if (NULL != psc->dsh)
- {
- GNUNET_DATASTORE_disconnect (psc->dsh, GNUNET_NO);
- psc->dsh = NULL;
- }
+ psc->dqe = NULL;
if (GNUNET_OK != success)
{
- if (psc->cont != NULL)
+ if (NULL != psc->cont)
psc->cont (psc->cont_cls, NULL, msg);
+ GNUNET_FS_publish_sks_cancel (psc);
+ return;
}
- else
+ if (NULL != psc->nsn)
{
- 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)
{
- /* 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);
+ 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);
}
- if (psc->cont != NULL)
- psc->cont (psc->cont_cls, psc->uri, NULL);
+ psc->nsn = NULL;
+ write_update_information_graph (psc->namespace);
}
- 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->cont)
+ psc->cont (psc->cont_cls, psc->uri, NULL);
+ GNUNET_FS_publish_sks_cancel (psc);
}
* @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 char *identifier, const char *update,
enum GNUNET_FS_PublishOptions options,
GNUNET_FS_PublishContinuation cont, void *cont_cls)
{
- struct PublishSksContext *psc;
+ struct GNUNET_FS_PublishSksContext *psc;
struct GNUNET_CRYPTO_AesSessionKey sk;
struct GNUNET_CRYPTO_AesInitializationVector iv;
struct GNUNET_FS_Uri *sks_uri;
{
GNUNET_break (0);
GNUNET_free (sb);
- cont (cont_cls, NULL, _("Internal error."));
- return;
+ if (NULL != cont)
+ cont (cont_cls, NULL, _("Internal error."));
+ return NULL;
}
size = sizeof (struct SBlock) + mdsize + slen + nidlen;
sb_enc = GNUNET_malloc (size);
GNUNET_assert (GNUNET_OK ==
GNUNET_CRYPTO_rsa_sign (namespace->key, &sb_enc->purpose,
&sb_enc->signature));
- psc = GNUNET_malloc (sizeof (struct PublishSksContext));
+ psc = GNUNET_malloc (sizeof (struct GNUNET_FS_PublishSksContext));
psc->uri = sks_uri;
psc->cont = cont;
- psc->namespace = namespace;
- namespace->rc++;
+ 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;
+ 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;
+ return NULL;
}
GNUNET_CRYPTO_hash_xor (&sks_uri->data.sks.namespace, &id, &query);
if (NULL != 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);
+ 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;
+}
+
+
+/**
+ * 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->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);
}
read_update_information_graph (namespace);
if (namespace->update_nodes == NULL)
{
-#if DEBUG_NAMESPACE
GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
"No updateable nodes found for ID `%s'\n", next_id);
-#endif
return; /* no nodes */
}
if (namespace->update_map == NULL)
&process_update_node, &pc);
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;
fc.tree_array = NULL;
nsn = namespace->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);
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.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,
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
}
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