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-rw-r--r--src/regex/regex_api_search.c248
1 files changed, 0 insertions, 248 deletions
diff --git a/src/regex/regex_api_search.c b/src/regex/regex_api_search.c
deleted file mode 100644
index 2e2536a02..000000000
--- a/src/regex/regex_api_search.c
+++ /dev/null
@@ -1,248 +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/**
19 * @file regex/regex_api_search.c
20 * @brief access regex service to discover
21 * peers using matching strings
22 * @author Maximilian Szengel
23 * @author Christian Grothoff
24 */
25#include "platform.h"
26#include "gnunet_protocols.h"
27#include "gnunet_util_lib.h"
28#include "gnunet_regex_service.h"
29#include "regex_ipc.h"
30
31#define LOG(kind,...) GNUNET_log_from (kind, "regex-api",__VA_ARGS__)
32
33
34/**
35 * Handle to store data about a regex search.
36 */
37struct GNUNET_REGEX_Search
38{
39 /**
40 * Connection to the regex service.
41 */
42 struct GNUNET_MQ_Handle *mq;
43
44 /**
45 * Our configuration.
46 */
47 const struct GNUNET_CONFIGURATION_Handle *cfg;
48
49 /**
50 * Function to call with results.
51 */
52 GNUNET_REGEX_Found callback;
53
54 /**
55 * Closure for @e callback.
56 */
57 void *callback_cls;
58
59 /**
60 * Search string to transmit to the service.
61 */
62 char *string;
63};
64
65
66/**
67 * (Re)connect to the REGEX service for the given search @a s.
68 *
69 * @param s context for the search search for
70 */
71static void
72search_reconnect (struct GNUNET_REGEX_Search *s);
73
74
75/**
76 * We got a response or disconnect after asking regex
77 * to do the search. Check it is well-formed.
78 *
79 * @param cls the `struct GNUNET_REGEX_Search` to handle reply for
80 * @param result the message
81 * @return #GNUNET_SYSERR if @a rm is not well-formed.
82 */
83static int
84check_search_response (void *cls,
85 const struct ResultMessage *result)
86{
87 uint16_t size = ntohs (result->header.size) - sizeof (*result);
88 uint16_t gpl = ntohs (result->get_path_length);
89 uint16_t ppl = ntohs (result->put_path_length);
90
91 if (size != (gpl + ppl) * sizeof (struct GNUNET_PeerIdentity))
92 {
93 GNUNET_break (0);
94 return GNUNET_SYSERR;
95 }
96 return GNUNET_OK;
97}
98
99
100/**
101 * We got a response or disconnect after asking regex
102 * to do the search. Handle it.
103 *
104 * @param cls the `struct GNUNET_REGEX_Search` to handle reply for
105 * @param result the message
106 */
107static void
108handle_search_response (void *cls,
109 const struct ResultMessage *result)
110{
111 struct GNUNET_REGEX_Search *s = cls;
112 uint16_t gpl = ntohs (result->get_path_length);
113 uint16_t ppl = ntohs (result->put_path_length);
114 const struct GNUNET_PeerIdentity *pid;
115
116 pid = &result->id;
117 LOG (GNUNET_ERROR_TYPE_DEBUG,
118 "Got regex result %s\n",
119 GNUNET_i2s (pid));
120 s->callback (s->callback_cls,
121 pid,
122 &pid[1],
123 gpl,
124 &pid[1 + gpl],
125 ppl);
126}
127
128
129/**
130 * We got a disconnect after asking regex to do the announcement.
131 * Retry.
132 *
133 * @param cls the `struct GNUNET_REGEX_Search` to retry
134 * @param error error code
135 */
136static void
137mq_error_handler (void *cls,
138 enum GNUNET_MQ_Error error)
139{
140 struct GNUNET_REGEX_Search *s = cls;
141
142 GNUNET_MQ_destroy (s->mq);
143 s->mq = NULL;
144 search_reconnect (s);
145}
146
147
148/**
149 * (Re)connect to the REGEX service for the given search @a s.
150 *
151 * @param s context for the search search for
152 */
153static void
154search_reconnect (struct GNUNET_REGEX_Search *s)
155{
156 struct GNUNET_MQ_MessageHandler handlers[] = {
157 GNUNET_MQ_hd_var_size (search_response,
158 GNUNET_MESSAGE_TYPE_REGEX_RESULT,
159 struct ResultMessage,
160 s),
161 GNUNET_MQ_handler_end ()
162 };
163 size_t slen = strlen (s->string) + 1;
164 struct GNUNET_MQ_Envelope *env;
165 struct RegexSearchMessage *rsm;
166
167 GNUNET_assert (NULL == s->mq);
168 s->mq = GNUNET_CLIENT_connect (s->cfg,
169 "regex",
170 handlers,
171 &mq_error_handler,
172 s);
173 if (NULL == s->mq)
174 return;
175 env = GNUNET_MQ_msg_extra (rsm,
176 slen,
177 GNUNET_MESSAGE_TYPE_REGEX_SEARCH);
178 GNUNET_memcpy (&rsm[1],
179 s->string,
180 slen);
181 GNUNET_MQ_send (s->mq,
182 env);
183}
184
185
186/**
187 * Search for a peer offering a regex matching certain string in the DHT.
188 * The search runs until #GNUNET_REGEX_search_cancel() is called, even if results
189 * are returned.
190 *
191 * @param cfg configuration to use
192 * @param string String to match against the regexes in the DHT.
193 * @param callback Callback for found peers.
194 * @param callback_cls Closure for @c callback.
195 * @return Handle to stop search and free resources.
196 * Must be freed by calling #GNUNET_REGEX_search_cancel().
197 */
198struct GNUNET_REGEX_Search *
199GNUNET_REGEX_search (const struct GNUNET_CONFIGURATION_Handle *cfg,
200 const char *string,
201 GNUNET_REGEX_Found callback,
202 void *callback_cls)
203{
204 struct GNUNET_REGEX_Search *s;
205 size_t slen = strlen (string) + 1;
206
207 if (slen + sizeof (struct RegexSearchMessage) >= GNUNET_MAX_MESSAGE_SIZE)
208 {
209 GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
210 _("Search string `%s' is too long!\n"),
211 string);
212 GNUNET_break (0);
213 return NULL;
214 }
215 LOG (GNUNET_ERROR_TYPE_DEBUG,
216 "Starting regex search for %s\n",
217 string);
218 s = GNUNET_new (struct GNUNET_REGEX_Search);
219 s->cfg = cfg;
220 s->string = GNUNET_strdup (string);
221 s->callback = callback;
222 s->callback_cls = callback_cls;
223 search_reconnect (s);
224 if (NULL == s->mq)
225 {
226 GNUNET_free (s->string);
227 GNUNET_free (s);
228 return NULL;
229 }
230 return s;
231}
232
233
234/**
235 * Stop search and free all data used by a #GNUNET_REGEX_search() call.
236 *
237 * @param s Handle returned by a previous #GNUNET_REGEX_search() call.
238 */
239void
240GNUNET_REGEX_search_cancel (struct GNUNET_REGEX_Search *s)
241{
242 GNUNET_MQ_destroy (s->mq);
243 GNUNET_free (s->string);
244 GNUNET_free (s);
245}
246
247
248/* end of regex_api_search.c */
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