From 3c7fefd9f96e3425d3daba84abcd6e89fc140ed6 Mon Sep 17 00:00:00 2001 From: =?utf8?q?Philipp=20T=C3=B6lke?= Date: Fri, 8 Oct 2010 07:36:36 +0000 Subject: [PATCH] template for the dns-block --- src/block/Makefile.am | 8 +++ src/block/plugin_block_dns.c | 128 +++++++++++++++++++++++++++++++++ src/include/gnunet_block_lib.h | 7 +- 3 files changed, 142 insertions(+), 1 deletion(-) create mode 100644 src/block/plugin_block_dns.c diff --git a/src/block/Makefile.am b/src/block/Makefile.am index b37c7705e..11dea77d7 100644 --- a/src/block/Makefile.am +++ b/src/block/Makefile.am @@ -16,6 +16,7 @@ plugin_LTLIBRARIES = \ libgnunet_plugin_block_dht.la \ libgnunet_plugin_block_fs.la \ libgnunet_plugin_block_template.la \ + libgnunet_plugin_block_dns.la \ libgnunet_plugin_block_test.la libgnunet_plugin_block_dht_la_SOURCES = \ @@ -35,6 +36,13 @@ libgnunet_plugin_block_fs_la_LIBADD = \ libgnunet_plugin_block_fs_la_LDFLAGS = \ $(GN_PLUGIN_LDFLAGS) +libgnunet_plugin_block_dns_la_SOURCES = \ + plugin_block_dns.c +libgnunet_plugin_block_dns_la_LIBADD = \ + $(top_builddir)/src/util/libgnunetutil.la +libgnunet_plugin_block_dns_la_LDFLAGS = \ + $(GN_PLUGIN_LDFLAGS) + libgnunet_plugin_block_template_la_SOURCES = \ plugin_block_template.c libgnunet_plugin_block_template_la_LIBADD = \ diff --git a/src/block/plugin_block_dns.c b/src/block/plugin_block_dns.c new file mode 100644 index 000000000..743747c85 --- /dev/null +++ b/src/block/plugin_block_dns.c @@ -0,0 +1,128 @@ +/* + This file is part of GNUnet + (C) 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 3, 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 block/plugin_block_dns.c + * @brief block plugin for storing .gnunet-bindings + * @author Philipp Tölke + */ + +#include "platform.h" +#include "plugin_block.h" + +#define DEBUG_DHT GNUNET_NO + +/** + * Function called to validate a reply or a request. For + * request evaluation, simply pass "NULL" for the reply_block. + * + * @param cls closure + * @param type block type + * @param query original query (hash) + * @param bf pointer to bloom filter associated with query; possibly updated (!) + * @param bf_mutator mutation value for bf + * @param xquery extended query data (can be NULL, depending on type) + * @param xquery_size number of bytes in xquery + * @param reply_block response to validate + * @param reply_block_size number of bytes in reply block + * @return characterization of result + */ +static enum GNUNET_BLOCK_EvaluationResult +block_plugin_dht_evaluate (void *cls, + enum GNUNET_BLOCK_Type type, + const GNUNET_HashCode *query, + struct GNUNET_CONTAINER_BloomFilter **bf, + int32_t bf_mutator, + const void *xquery, + size_t xquery_size, + const void *reply_block, + size_t reply_block_size) +{ + switch (type) + { + case GNUNET_BLOCK_TYPE_DNS: + if (xquery_size != 0) + return GNUNET_BLOCK_EVALUATION_REQUEST_INVALID; + if (reply_block_size == 0) + return GNUNET_BLOCK_EVALUATION_REQUEST_VALID; + return GNUNET_BLOCK_EVALUATION_OK_LAST; + default: + return GNUNET_BLOCK_EVALUATION_TYPE_NOT_SUPPORTED; + } +} + + +/** + * Function called to obtain the key for a block. + * + * @param cls closure + * @param type block type + * @param block block to get the key for + * @param block_size number of bytes in block + * @param key set to the key (query) for the given block + * @return GNUNET_OK on success, GNUNET_SYSERR if type not supported + * (or if extracting a key from a block of this type does not work) + */ +static int +block_plugin_dht_get_key (void *cls, + enum GNUNET_BLOCK_Type type, + const void *block, + size_t block_size, + GNUNET_HashCode *key) +{ + if (type != GNUNET_BLOCK_TYPE_DNS) + return GNUNET_SYSERR; + return GNUNET_SYSERR; +} + +/** + * Entry point for the plugin. + */ +void * +libgnunet_plugin_block_dht_init (void *cls) +{ + static enum GNUNET_BLOCK_Type types[] = + { + GNUNET_BLOCK_TYPE_DNS, + GNUNET_BLOCK_TYPE_ANY /* end of list */ + }; + struct GNUNET_BLOCK_PluginFunctions *api; + + api = GNUNET_malloc (sizeof (struct GNUNET_BLOCK_PluginFunctions)); + api->evaluate = &block_plugin_dht_evaluate; + api->get_key = &block_plugin_dht_get_key; + api->types = types; + return api; +} + + +/** + * Exit point from the plugin. + */ +void * +libgnunet_plugin_block_dht_done (void *cls) +{ + struct GNUNET_TRANSPORT_PluginFunctions *api = cls; + + GNUNET_free (api); + return NULL; +} + +/* end of plugin_block_dns.c */ diff --git a/src/include/gnunet_block_lib.h b/src/include/gnunet_block_lib.h index d0eb0d5fa..21a58cd40 100644 --- a/src/include/gnunet_block_lib.h +++ b/src/include/gnunet_block_lib.h @@ -94,8 +94,13 @@ enum GNUNET_BLOCK_Type /** * Block for simulating malicious peers. */ - GNUNET_BLOCK_DHT_MALICIOUS_MESSAGE_TYPE = 9 + GNUNET_BLOCK_DHT_MALICIOUS_MESSAGE_TYPE = 9, #endif + + /** + * Block for storing .gnunet-domains + */ + GNUNET_BLOCK_TYPE_DNS = 10 }; -- 2.25.1