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- /*
- This file is part of GNUnet.
- Copyright (C) 2009, 2010, 2012, 2013 GNUnet e.V.
- GNUnet is free software: you can redistribute it and/or modify it
- under the terms of the GNU Affero General Public License as published
- by the Free Software Foundation, either version 3 of the License,
- 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
- Affero General Public License for more details.
- You should have received a copy of the GNU Affero General Public License
- along with this program. If not, see <http://www.gnu.org/licenses/>.
- SPDX-License-Identifier: AGPL3.0-or-later
- */
- /**
- * @file fs/fs_publish_ksk.c
- * @brief publish a URI under a keyword in GNUnet
- * @see https://gnunet.org/encoding and #2564
- * @author Krista Bennett
- * @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"
- #include "fs_tree.h"
- #include "fs_publish_ublock.h"
- /**
- * Context for the KSK publication.
- */
- struct GNUNET_FS_PublishKskContext
- {
- /**
- * Keywords to use.
- */
- struct GNUNET_FS_Uri *ksk_uri;
- /**
- * URI to publish.
- */
- struct GNUNET_FS_Uri *uri;
- /**
- * Metadata to use.
- */
- struct GNUNET_CONTAINER_MetaData *meta;
- /**
- * Global FS context.
- */
- struct GNUNET_FS_Handle *h;
- /**
- * UBlock publishing operation that is active.
- */
- struct GNUNET_FS_PublishUblockContext *uc;
- /**
- * Handle to the datastore, NULL if we are just simulating.
- */
- struct GNUNET_DATASTORE_Handle *dsh;
- /**
- * Current task.
- */
- struct GNUNET_SCHEDULER_Task *ksk_task;
- /**
- * Function to call once we're done.
- */
- GNUNET_FS_PublishContinuation cont;
- /**
- * Closure for cont.
- */
- void *cont_cls;
- /**
- * When should the KBlocks expire?
- */
- struct GNUNET_FS_BlockOptions bo;
- /**
- * Options to use.
- */
- enum GNUNET_FS_PublishOptions options;
- /**
- * Keyword that we are currently processing.
- */
- unsigned int i;
- };
- /**
- * Continuation of #GNUNET_FS_publish_ksk() that performs
- * the actual publishing operation (iterating over all
- * of the keywords).
- *
- * @param cls closure of type `struct PublishKskContext *`
- */
- static void
- publish_ksk_cont (void *cls);
- /**
- * Function called by the datastore API with
- * the result from the PUT request.
- *
- * @param cls closure of type `struct GNUNET_FS_PublishKskContext *`
- * @param msg error message (or NULL)
- */
- static void
- kb_put_cont (void *cls,
- const char *msg)
- {
- struct GNUNET_FS_PublishKskContext *pkc = cls;
- pkc->uc = NULL;
- if (NULL != msg)
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "KBlock PUT operation failed: %s\n", msg);
- pkc->cont (pkc->cont_cls, NULL, msg);
- GNUNET_FS_publish_ksk_cancel (pkc);
- return;
- }
- pkc->ksk_task = GNUNET_SCHEDULER_add_now (&publish_ksk_cont, pkc);
- }
- /**
- * Continuation of #GNUNET_FS_publish_ksk() that performs the actual
- * publishing operation (iterating over all of the keywords).
- *
- * @param cls closure of type `struct GNUNET_FS_PublishKskContext *`
- */
- static void
- publish_ksk_cont (void *cls)
- {
- struct GNUNET_FS_PublishKskContext *pkc = cls;
- const char *keyword;
- pkc->ksk_task = NULL;
- if ((pkc->i == pkc->ksk_uri->data.ksk.keywordCount) ||
- (NULL == pkc->dsh))
- {
- GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
- "KSK PUT operation complete\n");
- pkc->cont (pkc->cont_cls, pkc->ksk_uri,
- NULL);
- GNUNET_FS_publish_ksk_cancel (pkc);
- return;
- }
- keyword = pkc->ksk_uri->data.ksk.keywords[pkc->i++];
- pkc->uc = GNUNET_FS_publish_ublock_ (pkc->h,
- pkc->dsh,
- keyword + 1 /* skip '+' */,
- NULL,
- GNUNET_CRYPTO_ecdsa_key_get_anonymous (),
- pkc->meta,
- pkc->uri,
- &pkc->bo,
- pkc->options,
- &kb_put_cont, pkc);
- }
- /**
- * Publish a CHK under various keywords on GNUnet.
- *
- * @param h handle to the file sharing subsystem
- * @param ksk_uri keywords to use
- * @param meta metadata to use
- * @param uri URI to refer to in the KBlock
- * @param bo per-block options
- * @param options publication options
- * @param cont continuation
- * @param cont_cls closure for cont
- * @return NULL on error ('cont' will still be called)
- */
- struct GNUNET_FS_PublishKskContext *
- GNUNET_FS_publish_ksk (struct GNUNET_FS_Handle *h,
- const struct GNUNET_FS_Uri *ksk_uri,
- 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 GNUNET_FS_PublishKskContext *pkc;
- GNUNET_assert (NULL != uri);
- pkc = GNUNET_new (struct GNUNET_FS_PublishKskContext);
- pkc->h = h;
- pkc->bo = *bo;
- pkc->options = options;
- pkc->cont = cont;
- pkc->cont_cls = cont_cls;
- pkc->meta = GNUNET_CONTAINER_meta_data_duplicate (meta);
- if (0 == (options & GNUNET_FS_PUBLISH_OPTION_SIMULATE_ONLY))
- {
- pkc->dsh = GNUNET_DATASTORE_connect (h->cfg);
- if (NULL == pkc->dsh)
- {
- cont (cont_cls,
- NULL,
- _ ("Could not connect to datastore."));
- GNUNET_free (pkc);
- return NULL;
- }
- }
- pkc->uri = GNUNET_FS_uri_dup (uri);
- pkc->ksk_uri = GNUNET_FS_uri_dup (ksk_uri);
- pkc->ksk_task = GNUNET_SCHEDULER_add_now (&publish_ksk_cont, pkc);
- return pkc;
- }
- /**
- * Abort the KSK publishing operation.
- *
- * @param pkc context of the operation to abort.
- */
- void
- GNUNET_FS_publish_ksk_cancel (struct GNUNET_FS_PublishKskContext *pkc)
- {
- if (NULL != pkc->ksk_task)
- {
- GNUNET_SCHEDULER_cancel (pkc->ksk_task);
- pkc->ksk_task = NULL;
- }
- if (NULL != pkc->uc)
- {
- GNUNET_FS_publish_ublock_cancel_ (pkc->uc);
- pkc->uc = NULL;
- }
- if (NULL != pkc->dsh)
- {
- GNUNET_DATASTORE_disconnect (pkc->dsh, GNUNET_NO);
- pkc->dsh = NULL;
- }
- GNUNET_CONTAINER_meta_data_destroy (pkc->meta);
- GNUNET_FS_uri_destroy (pkc->ksk_uri);
- GNUNET_FS_uri_destroy (pkc->uri);
- GNUNET_free (pkc);
- }
- /* end of fs_publish_ksk.c */
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