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Diffstat (limited to 'src/dht/gnunet-service-xdht_datacache.c')
-rw-r--r--src/dht/gnunet-service-xdht_datacache.c401
1 files changed, 0 insertions, 401 deletions
diff --git a/src/dht/gnunet-service-xdht_datacache.c b/src/dht/gnunet-service-xdht_datacache.c
deleted file mode 100644
index 10ae0068e..000000000
--- a/src/dht/gnunet-service-xdht_datacache.c
+++ /dev/null
@@ -1,401 +0,0 @@
1/*
2 This file is part of GNUnet.
3 Copyright (C) 2009, 2010, 2011, 2015 GNUnet e.V.
4
5 GNUnet is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published
7 by the Free Software Foundation; either version 3, or (at your
8 option) any later version.
9
10 GNUnet is distributed in the hope that it will be useful, but
11 WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 General Public License for more details.
14
15 You should have received a copy of the GNU General Public License
16 along with GNUnet; see the file COPYING. If not, write to the
17 Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
18 Boston, MA 02110-1301, USA.
19*/
20/**
21 * @file dht/gnunet-service-xdht_datacache.c
22 * @brief GNUnet DHT service's datacache integration
23 * @author Christian Grothoff
24 * @author Nathan Evans
25 */
26#include "platform.h"
27#include "gnunet_datacache_lib.h"
28#include "gnunet-service-xdht_clients.h"
29#include "gnunet-service-xdht_datacache.h"
30#include "gnunet-service-xdht_routing.h"
31#include "gnunet-service-xdht_neighbours.h"
32#include "gnunet-service-dht.h"
33
34#define LOG(kind,...) GNUNET_log_from (kind, "dht-dtcache",__VA_ARGS__)
35
36#define DEBUG(...) \
37 GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, __VA_ARGS__)
38
39/**
40 * Handle to the datacache service (for inserting/retrieving data)
41 */
42static struct GNUNET_DATACACHE_Handle *datacache;
43
44
45/**
46 * Handle a datum we've received from another peer. Cache if
47 * possible.
48 *
49 * @param expiration when will the reply expire
50 * @param key the query this reply is for
51 * @param put_path_length number of peers in @a put_path
52 * @param put_path path the reply took on put
53 * @param type type of the reply
54 * @param data_size number of bytes in @a data
55 * @param data application payload data
56 */
57void
58GDS_DATACACHE_handle_put (struct GNUNET_TIME_Absolute expiration,
59 const struct GNUNET_HashCode *key,
60 unsigned int put_path_length,
61 const struct GNUNET_PeerIdentity *put_path,
62 enum GNUNET_BLOCK_Type type,
63 size_t data_size,
64 const void *data)
65{
66 int r;
67
68 if (NULL == datacache)
69 {
70 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
71 "PUT request received, but have no datacache!\n");
72 return;
73 }
74 if (data_size >= GNUNET_SERVER_MAX_MESSAGE_SIZE)
75 {
76 GNUNET_break (0);
77 return;
78 }
79
80 /* Put size is actual data size plus struct overhead plus path length (if any) */
81 r = GNUNET_DATACACHE_put (datacache,
82 key,
83 data_size,
84 data,
85 type,
86 expiration,
87 put_path_length,
88 put_path);
89 if (GNUNET_OK == r)
90 GNUNET_STATISTICS_update (GDS_stats,
91 gettext_noop ("# ITEMS stored in datacache"), 1,
92 GNUNET_NO);
93 LOG (GNUNET_ERROR_TYPE_DEBUG,
94 "DATACACHE PUT for key %s [%u] completed (%d) after %u hops\n",
95 GNUNET_h2s (key),
96 data_size,
97 r,
98 put_path_length);
99}
100
101
102/**
103 * List of peers in the get path.
104 */
105struct GetPath
106{
107 /**
108 * Pointer to next item in the list
109 */
110 struct GetPath *next;
111
112 /**
113 * Pointer to previous item in the list
114 */
115 struct GetPath *prev;
116
117 /**
118 * An element in the get path.
119 */
120 struct GNUNET_PeerIdentity peer;
121};
122
123
124/**
125 * Context containing information about a GET request.
126 */
127struct GetRequestContext
128{
129 /**
130 * extended query (see gnunet_block_lib.h).
131 */
132 const void *xquery;
133
134 /**
135 * Bloomfilter to filter out duplicate replies (updated)
136 */
137 struct GNUNET_CONTAINER_BloomFilter **reply_bf;
138
139 /**
140 * The key this request was about
141 */
142 struct GNUNET_HashCode key;
143
144 /**
145 * Number of bytes in xquery.
146 */
147 size_t xquery_size;
148
149 /**
150 * Mutator value for the @e reply_bf, see gnunet_block_lib.h
151 */
152 uint32_t reply_bf_mutator;
153
154 /**
155 * Total number of peers in get path.
156 */
157 unsigned int get_path_length;
158
159 /**
160 * Return value to give back.
161 */
162 enum GNUNET_BLOCK_EvaluationResult eval;
163
164 /**
165 * Peeer which has the data for the key.
166 */
167 struct GNUNET_PeerIdentity source_peer;
168
169 /**
170 * Next hop to forward the get result to.
171 */
172 struct GNUNET_PeerIdentity next_hop;
173
174 /**
175 * Head of get path.
176 */
177 struct GetPath *head;
178
179 /**
180 * Tail of get path.
181 */
182 struct GetPath *tail;
183
184 /* get_path */
185};
186
187
188/**
189 * Iterator for local get request results,
190 *
191 * @param cls closure for iterator, a `struct GetRequestContext`
192 * @param key the key this @a data is stored under
193 * @param size the size of the data identified by key
194 * @param data the actual data
195 * @param type the type of the @a data
196 * @param exp when does this value expire?
197 * @param put_path_length number of peers in @a put_path
198 * @param put_path path the reply took on put
199 * @return #GNUNET_OK to continue iteration, anything else
200 * to stop iteration.
201 */
202static int
203datacache_get_iterator (void *cls,
204 const struct GNUNET_HashCode *key,
205 size_t size,
206 const char *data,
207 enum GNUNET_BLOCK_Type type,
208 struct GNUNET_TIME_Absolute exp,
209 unsigned int put_path_length,
210 const struct GNUNET_PeerIdentity *put_path)
211{
212 struct GetRequestContext *ctx = cls;
213 enum GNUNET_BLOCK_EvaluationResult eval;
214
215 eval =
216 GNUNET_BLOCK_evaluate (GDS_block_context,
217 type,
218 GNUNET_BLOCK_EO_NONE,
219 key,
220 ctx->reply_bf,
221 ctx->reply_bf_mutator,
222 ctx->xquery,
223 ctx->xquery_size,
224 data,
225 size);
226 LOG (GNUNET_ERROR_TYPE_DEBUG,
227 "Found reply for query %s in datacache, evaluation result is %d\n",
228 GNUNET_h2s (key), (int) eval);
229 ctx->eval = eval;
230
231 switch (eval)
232 {
233 case GNUNET_BLOCK_EVALUATION_OK_MORE:
234 case GNUNET_BLOCK_EVALUATION_OK_LAST:
235 /* forward to local clients */
236 GNUNET_STATISTICS_update (GDS_stats,
237 gettext_noop
238 ("# Good RESULTS found in datacache"), 1,
239 GNUNET_NO);
240 struct GNUNET_PeerIdentity *get_path;
241 get_path = GNUNET_malloc (sizeof (struct GNUNET_PeerIdentity) *
242 ctx->get_path_length);
243 struct GetPath *iterator;
244 iterator = ctx->head;
245 int i = 0;
246 while (i < ctx->get_path_length)
247 {
248 get_path[i] = iterator->peer;
249 i++;
250 iterator = iterator->next;
251 }
252 GDS_NEIGHBOURS_send_get_result (key,type,
253 &ctx->next_hop,
254 &ctx->source_peer,
255 put_path_length,
256 put_path,
257 ctx->get_path_length,
258 get_path,
259 exp,
260 data,
261 size);
262 GNUNET_free_non_null (get_path);
263 break;
264 case GNUNET_BLOCK_EVALUATION_OK_DUPLICATE:
265 GNUNET_STATISTICS_update (GDS_stats,
266 gettext_noop
267 ("# Duplicate RESULTS found in datacache"), 1,
268 GNUNET_NO);
269 break;
270 case GNUNET_BLOCK_EVALUATION_RESULT_INVALID:
271 GNUNET_STATISTICS_update (GDS_stats,
272 gettext_noop
273 ("# Invalid RESULTS found in datacache"), 1,
274 GNUNET_NO);
275 break;
276 case GNUNET_BLOCK_EVALUATION_RESULT_IRRELEVANT:
277 GNUNET_STATISTICS_update (GDS_stats,
278 gettext_noop
279 ("# Irrelevant RESULTS found in datacache"), 1,
280 GNUNET_NO);
281 break;
282 case GNUNET_BLOCK_EVALUATION_REQUEST_VALID:
283 GNUNET_break (0);
284 break;
285 case GNUNET_BLOCK_EVALUATION_REQUEST_INVALID:
286 GNUNET_break_op (0);
287 return GNUNET_SYSERR;
288 case GNUNET_BLOCK_EVALUATION_TYPE_NOT_SUPPORTED:
289 GNUNET_STATISTICS_update (GDS_stats,
290 gettext_noop
291 ("# Unsupported RESULTS found in datacache"), 1,
292 GNUNET_NO);
293 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
294 _("Unsupported block type (%u) in local response!\n"),
295 type);
296 break;
297 }
298
299 return (eval == GNUNET_BLOCK_EVALUATION_OK_LAST) ? GNUNET_NO : GNUNET_OK;
300}
301
302
303/**
304 * Handle a GET request we've received from another peer.
305 *
306 * @param key the query
307 * @param type requested data type
308 * @param xquery extended query
309 * @param xquery_size number of bytes in @a xquery
310 * @param reply_bf where the reply bf is (to be) stored, possibly updated, can be NULL
311 * @param reply_bf_mutator mutation value for @a reply_bf
312 * @return evaluation result for the local replies
313 * @get_path_length Total number of peers in get path
314 * @get_path Peers in get path.
315 */
316enum GNUNET_BLOCK_EvaluationResult
317GDS_DATACACHE_handle_get (const struct GNUNET_HashCode *key,
318 enum GNUNET_BLOCK_Type type,
319 const void *xquery,
320 size_t xquery_size,
321 struct GNUNET_CONTAINER_BloomFilter **reply_bf,
322 uint32_t reply_bf_mutator,
323 uint32_t get_path_length,
324 struct GNUNET_PeerIdentity *get_path,
325 struct GNUNET_PeerIdentity *next_hop,
326 struct GNUNET_PeerIdentity *source_peer)
327{
328 struct GetRequestContext ctx;
329 unsigned int r;
330
331 if (datacache == NULL)
332 return GNUNET_BLOCK_EVALUATION_REQUEST_VALID;
333 GNUNET_STATISTICS_update (GDS_stats,
334 gettext_noop ("# GET requests given to datacache"),
335 1, GNUNET_NO);
336 ctx.eval = GNUNET_BLOCK_EVALUATION_REQUEST_VALID;
337 ctx.key = *key;
338 ctx.xquery = xquery;
339 ctx.xquery_size = xquery_size;
340 ctx.reply_bf = reply_bf;
341 ctx.reply_bf_mutator = reply_bf_mutator;
342 ctx.get_path_length = get_path_length;
343
344 if (NULL != next_hop)
345 ctx.next_hop = *next_hop;
346 unsigned int i = 0;
347
348 ctx.head = NULL;
349 ctx.tail = NULL;
350 if (NULL != get_path)
351 {
352 while (i < get_path_length)
353 {
354 struct GetPath *element;
355 element = GNUNET_new (struct GetPath);
356 element->next = NULL;
357 element->prev = NULL;
358 element->peer = get_path[i];
359 GNUNET_CONTAINER_DLL_insert_tail (ctx.head, ctx.tail, element);
360 i++;
361 }
362 }
363
364 r = GNUNET_DATACACHE_get (datacache,
365 key,
366 type,
367 &datacache_get_iterator,
368 &ctx);
369 DEBUG ("DATACACHE_GET for key %s completed (%d). %u results found.\n",
370 GNUNET_h2s (key),
371 ctx.eval,
372 r);
373 return ctx.eval;
374}
375
376
377/**
378 * Initialize datacache subsystem.
379 */
380void
381GDS_DATACACHE_init ()
382{
383 datacache = GNUNET_DATACACHE_create (GDS_cfg, "dhtcache");
384}
385
386
387/**
388 * Shutdown datacache subsystem.
389 */
390void
391GDS_DATACACHE_done ()
392{
393 if (NULL != datacache)
394 {
395 GNUNET_DATACACHE_destroy (datacache);
396 datacache = NULL;
397 }
398}
399
400
401/* end of gnunet-service-xdht_datacache.c */
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-02 12:58:52 +0000