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
#include "gnunet_fs_service.h"
#include "fs.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
+ * @param h global fs handle
* @return NULL on error, otherwise the name of the directory
*/
static char *
char *dn;
if (GNUNET_OK !=
- GNUNET_CONFIGURATION_get_value_filename (h->cfg,
- "FS",
- "IDENTITY_DIR",
- &dn))
+ 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.
+ *
+ * @param ns namespace to dump
+ */
+static void
+write_update_information_graph (struct GNUNET_FS_Namespace *ns)
+{
+ 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_log (GNUNET_ERROR_TYPE_ERROR,
- _("Configuration fails to specify `%s' in section `%s'\n"),
- "IDENTITY_DIR",
- "fs");
- return NULL;
+ GNUNET_free (uris);
+ break;
}
- return dn;
+ 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);
}
/**
* Our KSK URI.
- */
+ */
struct GNUNET_FS_Uri *ksk_uri;
/**
struct GNUNET_FS_Namespace *ns;
/**
- * Expiration time.
+ * Block options.
*/
- struct GNUNET_TIME_Absolute expiration;
+ struct GNUNET_FS_BlockOptions bo;
/**
* Number of bytes of plaintext.
- */
- size_t pt_size;
-
- /**
- * Anonymity level.
- */
- uint32_t anonymity;
-
- /**
- * Content priority.
*/
- uint32_t priority;
+ size_t pt_size;
/**
* Current keyword offset.
};
+/**
+ * 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 msg NULL on success, otherwise an error message
*/
static void
-advertisement_cont (void *cls,
- int success,
- const char *msg)
+advertisement_cont (void *cls, int success, const char *msg)
{
struct AdvertisementContext *ac = cls;
const char *keyword;
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)
{
- /* error! */
- GNUNET_DATASTORE_disconnect (ac->dsh, GNUNET_NO);
- 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;
+ 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_DATASTORE_disconnect (ac->dsh, GNUNET_NO);
+ {
+ /* 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;
- }
-
+ 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 */
+ * 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));
+ 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));
+ 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_DATASTORE_BLOCKTYPE_NBLOCK,
- ac->priority,
- ac->anonymity,
- ac->expiration,
- GNUNET_CONSTANTS_SERVICE_TIMEOUT,
- &advertisement_cont,
- ac);
+ 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.
+ * 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 anonymity for the namespace advertismement
- * @param priority for the namespace advertisement
- * @param expiration 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,
- uint32_t anonymity,
- uint32_t priority,
- struct GNUNET_TIME_Absolute expiration,
- const char *rootEntry,
- GNUNET_FS_PublishContinuation cont,
- void *cont_cls)
+ 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;
/* create advertisements */
mdsize = GNUNET_CONTAINER_meta_data_get_serialized_size (meta);
if (-1 == mdsize)
- {
- cont (cont_cls, NULL, _("Failed to serialize meta data"));
- return;
- }
+ {
+ 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;
- }
+ {
+ 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);
+ 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;
+ {
+ 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));
+ 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.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, h->sched);
+ 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;
- }
+ {
+ 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->pt_size = mdsize + reslen;
ctx->ns = namespace;
ctx->ns->rc++;
- ctx->anonymity = anonymity;
- ctx->priority = priority;
- ctx->expiration = expiration;
+ ctx->bo = *bo;
advertisement_cont (ctx, GNUNET_OK, NULL);
}
* @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_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;
- }
+ {
+ 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;
}
*
* @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 != 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++)
{
- GNUNET_CRYPTO_rsa_key_free (namespace->key);
- GNUNET_free (namespace->filename);
- 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;
}
* GNUNET_SYSERR to abort iteration with error!
*/
static int
-process_namespace (void *cls,
- const char *filename)
+process_namespace (void *cls, const char *filename)
{
struct ProcessNamespaceContext *pnc = cls;
struct GNUNET_CRYPTO_RsaPrivateKey *key;
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_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);
+ 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);
+ 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_DISK_directory_scan (dn, &process_namespace, &ctx);
GNUNET_free (dn);
}
-/* end of fs_namespace.c */
+
+
+/**
+ * Context for the SKS publication.
+ */
+struct PublishSksContext
+{
+
+ /**
+ * 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;
+
+};
+
+
+/**
+ * Function called by the datastore API with
+ * the result from the PUT (SBlock) request.
+ *
+ * @param cls closure of type "struct PublishSksContext*"
+ * @param success GNUNET_OK on success
+ * @param msg error message (or NULL)
+ */
+static void
+sb_put_cont (void *cls, int success, const char *msg)
+{
+ struct PublishSksContext *psc = cls;
+ GNUNET_HashCode hc;
+
+ if (NULL != psc->dsh)
+ {
+ GNUNET_DATASTORE_disconnect (psc->dsh, GNUNET_NO);
+ psc->dsh = NULL;
+ }
+ if (GNUNET_OK != success)
+ {
+ if (psc->cont != NULL)
+ psc->cont (psc->cont_cls, NULL, msg);
+ }
+ 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);
+}
+
+
+/**
+ * Publish an SBlock on GNUnet.
+ *
+ * @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
+ */
+void
+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)
+{
+ struct 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);
+ 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->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));
+ 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))
+ {
+ 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;
+ }
+ 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);
+ }
+ 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);
+}
+
+
+/**
+ * Closure for 'process_update_node'.
+ */
+struct ProcessUpdateClosure
+{
+ /**
+ * Function to call for each node.
+ */
+ GNUNET_FS_IdentifierProcessor ip;
+
+ /**
+ * Closure for 'ip'.
+ */
+ void *ip_cls;
+};
+
+
+/**
+ * Call the iterator in the closure for each node.
+ *
+ * @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.
+ */
+static int
+process_update_node (void *cls, const 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);
+ return GNUNET_YES;
+}
+
+
+/**
+ * Closure for 'find_trees'.
+ */
+struct FindTreeClosure
+{
+ /**
+ * 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;
+};
+
+
+/**
+ * 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 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.
+ */
+static int
+find_trees (void *cls, const GNUNET_HashCode * key, void *value)
+{
+ struct FindTreeClosure *fc = cls;
+ struct NamespaceUpdateNode *nsn = value;
+ GNUNET_HashCode hc;
+
+ 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;
+}
+
+
+/**
+ * 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)
+{
+ 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)
+ {
+#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)
+ {
+ /* 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);
+ }
+ }
+ 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;
+ }
+#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;
+ fc.tree_array_size = 0;
+
+ for (i = 0; i < namespace->update_node_count; i++)
+ {
+ 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);
+ nsn->nug = nug;
+ 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)
+ {
+ /* 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;
+ }
+#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,
+ &find_trees, &fc);
+ }
+ else
+ {
+ /* make head of 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
+}
+
+
+/* end of fs_namespace.c */
projects / oweals / gnunet.git / blobdiff