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-rw-r--r--src/regex/regex_api_search.c250
1 files changed, 0 insertions, 250 deletions
diff --git a/src/regex/regex_api_search.c b/src/regex/regex_api_search.c
deleted file mode 100644
index 960719cbd..000000000
--- a/src/regex/regex_api_search.c
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@@ -1,250 +0,0 @@
1/*
2 This file is part of GNUnet
3 Copyright (C) 2012, 2013, 2016 GNUnet e.V.
4
5 GNUnet is free software: you can redistribute it and/or modify it
6 under the terms of the GNU Affero General Public License as published
7 by the Free Software Foundation, either version 3 of the License,
8 or (at your 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 Affero General Public License for more details.
14
15 You should have received a copy of the GNU Affero General Public License
16 along with this program. If not, see <http://www.gnu.org/licenses/>.
17
18 SPDX-License-Identifier: AGPL3.0-or-later
19 */
20/**
21 * @file regex/regex_api_search.c
22 * @brief access regex service to discover
23 * peers using matching strings
24 * @author Maximilian Szengel
25 * @author Christian Grothoff
26 */
27#include "platform.h"
28#include "gnunet_protocols.h"
29#include "gnunet_util_lib.h"
30#include "gnunet_regex_service.h"
31#include "regex_ipc.h"
32
33#define LOG(kind, ...) GNUNET_log_from (kind, "regex-api", __VA_ARGS__)
34
35
36/**
37 * Handle to store data about a regex search.
38 */
39struct GNUNET_REGEX_Search
40{
41 /**
42 * Connection to the regex service.
43 */
44 struct GNUNET_MQ_Handle *mq;
45
46 /**
47 * Our configuration.
48 */
49 const struct GNUNET_CONFIGURATION_Handle *cfg;
50
51 /**
52 * Function to call with results.
53 */
54 GNUNET_REGEX_Found callback;
55
56 /**
57 * Closure for @e callback.
58 */
59 void *callback_cls;
60
61 /**
62 * Search string to transmit to the service.
63 */
64 char *string;
65};
66
67
68/**
69 * (Re)connect to the REGEX service for the given search @a s.
70 *
71 * @param s context for the search search for
72 */
73static void
74search_reconnect (struct GNUNET_REGEX_Search *s);
75
76
77/**
78 * We got a response or disconnect after asking regex
79 * to do the search. Check it is well-formed.
80 *
81 * @param cls the `struct GNUNET_REGEX_Search` to handle reply for
82 * @param result the message
83 * @return #GNUNET_SYSERR if @a rm is not well-formed.
84 */
85static int
86check_search_response (void *cls,
87 const struct ResultMessage *result)
88{
89 uint16_t size = ntohs (result->header.size) - sizeof(*result);
90 uint16_t gpl = ntohs (result->get_path_length);
91 uint16_t ppl = ntohs (result->put_path_length);
92
93 if (size != (gpl + ppl) * sizeof(struct GNUNET_PeerIdentity))
94 {
95 GNUNET_break (0);
96 return GNUNET_SYSERR;
97 }
98 return GNUNET_OK;
99}
100
101
102/**
103 * We got a response or disconnect after asking regex
104 * to do the search. Handle it.
105 *
106 * @param cls the `struct GNUNET_REGEX_Search` to handle reply for
107 * @param result the message
108 */
109static void
110handle_search_response (void *cls,
111 const struct ResultMessage *result)
112{
113 struct GNUNET_REGEX_Search *s = cls;
114 uint16_t gpl = ntohs (result->get_path_length);
115 uint16_t ppl = ntohs (result->put_path_length);
116 const struct GNUNET_PeerIdentity *pid;
117
118 pid = &result->id;
119 LOG (GNUNET_ERROR_TYPE_DEBUG,
120 "Got regex result %s\n",
121 GNUNET_i2s (pid));
122 s->callback (s->callback_cls,
123 pid,
124 &pid[1],
125 gpl,
126 &pid[1 + gpl],
127 ppl);
128}
129
130
131/**
132 * We got a disconnect after asking regex to do the announcement.
133 * Retry.
134 *
135 * @param cls the `struct GNUNET_REGEX_Search` to retry
136 * @param error error code
137 */
138static void
139mq_error_handler (void *cls,
140 enum GNUNET_MQ_Error error)
141{
142 struct GNUNET_REGEX_Search *s = cls;
143
144 GNUNET_MQ_destroy (s->mq);
145 s->mq = NULL;
146 search_reconnect (s);
147}
148
149
150/**
151 * (Re)connect to the REGEX service for the given search @a s.
152 *
153 * @param s context for the search search for
154 */
155static void
156search_reconnect (struct GNUNET_REGEX_Search *s)
157{
158 struct GNUNET_MQ_MessageHandler handlers[] = {
159 GNUNET_MQ_hd_var_size (search_response,
160 GNUNET_MESSAGE_TYPE_REGEX_RESULT,
161 struct ResultMessage,
162 s),
163 GNUNET_MQ_handler_end ()
164 };
165 size_t slen = strlen (s->string) + 1;
166 struct GNUNET_MQ_Envelope *env;
167 struct RegexSearchMessage *rsm;
168
169 GNUNET_assert (NULL == s->mq);
170 s->mq = GNUNET_CLIENT_connect (s->cfg,
171 "regex",
172 handlers,
173 &mq_error_handler,
174 s);
175 if (NULL == s->mq)
176 return;
177 env = GNUNET_MQ_msg_extra (rsm,
178 slen,
179 GNUNET_MESSAGE_TYPE_REGEX_SEARCH);
180 GNUNET_memcpy (&rsm[1],
181 s->string,
182 slen);
183 GNUNET_MQ_send (s->mq,
184 env);
185}
186
187
188/**
189 * Search for a peer offering a regex matching certain string in the DHT.
190 * The search runs until #GNUNET_REGEX_search_cancel() is called, even if results
191 * are returned.
192 *
193 * @param cfg configuration to use
194 * @param string String to match against the regexes in the DHT.
195 * @param callback Callback for found peers.
196 * @param callback_cls Closure for @c callback.
197 * @return Handle to stop search and free resources.
198 * Must be freed by calling #GNUNET_REGEX_search_cancel().
199 */
200struct GNUNET_REGEX_Search *
201GNUNET_REGEX_search (const struct GNUNET_CONFIGURATION_Handle *cfg,
202 const char *string,
203 GNUNET_REGEX_Found callback,
204 void *callback_cls)
205{
206 struct GNUNET_REGEX_Search *s;
207 size_t slen = strlen (string) + 1;
208
209 if (slen + sizeof(struct RegexSearchMessage) >= GNUNET_MAX_MESSAGE_SIZE)
210 {
211 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
212 _ ("Search string `%s' is too long!\n"),
213 string);
214 GNUNET_break (0);
215 return NULL;
216 }
217 LOG (GNUNET_ERROR_TYPE_DEBUG,
218 "Starting regex search for %s\n",
219 string);
220 s = GNUNET_new (struct GNUNET_REGEX_Search);
221 s->cfg = cfg;
222 s->string = GNUNET_strdup (string);
223 s->callback = callback;
224 s->callback_cls = callback_cls;
225 search_reconnect (s);
226 if (NULL == s->mq)
227 {
228 GNUNET_free (s->string);
229 GNUNET_free (s);
230 return NULL;
231 }
232 return s;
233}
234
235
236/**
237 * Stop search and free all data used by a #GNUNET_REGEX_search() call.
238 *
239 * @param s Handle returned by a previous #GNUNET_REGEX_search() call.
240 */
241void
242GNUNET_REGEX_search_cancel (struct GNUNET_REGEX_Search *s)
243{
244 GNUNET_MQ_destroy (s->mq);
245 GNUNET_free (s->string);
246 GNUNET_free (s);
247}
248
249
250/* end of regex_api_search.c */
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