1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
|
/*
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 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.
*/
/**
* @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 */
|
