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-rw-r--r--src/cadet/cadet_api_get_path.c276
1 files changed, 0 insertions, 276 deletions
diff --git a/src/cadet/cadet_api_get_path.c b/src/cadet/cadet_api_get_path.c
deleted file mode 100644
index 68070eab2..000000000
--- a/src/cadet/cadet_api_get_path.c
+++ /dev/null
@@ -1,276 +0,0 @@
1/*
2 This file is part of GNUnet.
3 Copyright (C) 2011, 2017 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 cadet/cadet_api_get_path.c
22 * @brief cadet api: client implementation of cadet service
23 * @author Bartlomiej Polot
24 * @author Christian Grothoff
25 */
26#include "platform.h"
27#include "gnunet_util_lib.h"
28#include "gnunet_constants.h"
29#include "gnunet_cadet_service.h"
30#include "cadet.h"
31#include "cadet_protocol.h"
32
33
34/**
35 * Operation handle.
36 */
37struct GNUNET_CADET_GetPath
38{
39 /**
40 * Monitor callback
41 */
42 GNUNET_CADET_PathCB path_cb;
43
44 /**
45 * Closure for @c path_cb.
46 */
47 void *path_cb_cls;
48
49 /**
50 * Message queue to talk to CADET service.
51 */
52 struct GNUNET_MQ_Handle *mq;
53
54 /**
55 * Configuration we use.
56 */
57 const struct GNUNET_CONFIGURATION_Handle *cfg;
58
59 /**
60 * Task to reconnect.
61 */
62 struct GNUNET_SCHEDULER_Task *reconnect_task;
63
64 /**
65 * Backoff for reconnect attempts.
66 */
67 struct GNUNET_TIME_Relative backoff;
68
69 /**
70 * Peer we want information about.
71 */
72 struct GNUNET_PeerIdentity id;
73};
74
75
76/**
77 * Check that message received from CADET service is well-formed.
78 *
79 * @param cls unused
80 * @param message the message we got
81 * @return #GNUNET_OK if the message is well-formed,
82 * #GNUNET_SYSERR otherwise
83 */
84static int
85check_get_path (void *cls,
86 const struct GNUNET_CADET_LocalInfoPath *message)
87{
88 size_t msize = sizeof(struct GNUNET_CADET_LocalInfoPath);
89 size_t esize;
90
91 (void) cls;
92 esize = ntohs (message->header.size);
93 if (esize < msize)
94 {
95 GNUNET_break (0);
96 return GNUNET_SYSERR;
97 }
98 if (0 != ((esize - msize) % sizeof(struct GNUNET_PeerIdentity)))
99 {
100 GNUNET_break (0);
101 return GNUNET_SYSERR;
102 }
103 return GNUNET_OK;
104}
105
106
107/**
108 * Process a local peer info reply, pass info to the user.
109 *
110 * @param cls Closure
111 * @param message Message itself.
112 */
113static void
114handle_get_path (void *cls,
115 const struct GNUNET_CADET_LocalInfoPath *message)
116{
117 struct GNUNET_CADET_GetPath *gp = cls;
118 struct GNUNET_CADET_PeerPathDetail ppd;
119
120 ppd.peer = gp->id;
121 ppd.path = (const struct GNUNET_PeerIdentity *) &message[1];
122 ppd.target_offset = ntohl (message->off);
123 ppd.path_length = (ntohs (message->header.size) - sizeof(*message))
124 / sizeof(struct GNUNET_PeerIdentity);
125 gp->path_cb (gp->path_cb_cls,
126 &ppd);
127}
128
129
130/**
131 * Process a local peer info reply, pass info to the user.
132 *
133 * @param cls Closure
134 * @param message Message itself.
135 */
136static void
137handle_get_path_end (void *cls,
138 const struct GNUNET_MessageHeader *message)
139{
140 struct GNUNET_CADET_GetPath *gp = cls;
141
142 (void) message;
143 gp->path_cb (gp->path_cb_cls,
144 NULL);
145 GNUNET_CADET_get_path_cancel (gp);
146}
147
148
149/**
150 * Reconnect to the service and try again.
151 *
152 * @param cls a `struct GNUNET_CADET_GetPath` operation
153 */
154static void
155reconnect (void *cls);
156
157
158/**
159 * Function called on connection trouble. Reconnects.
160 *
161 * @param cls a `struct GNUNET_CADET_GetPath`
162 * @param error error code from MQ
163 */
164static void
165error_handler (void *cls,
166 enum GNUNET_MQ_Error error)
167{
168 struct GNUNET_CADET_GetPath *gp = cls;
169
170 GNUNET_MQ_destroy (gp->mq);
171 gp->mq = NULL;
172 gp->backoff = GNUNET_TIME_randomized_backoff (gp->backoff,
173 GNUNET_TIME_UNIT_MINUTES);
174 gp->reconnect_task = GNUNET_SCHEDULER_add_delayed (gp->backoff,
175 &reconnect,
176 gp);
177}
178
179
180/**
181 * Reconnect to the service and try again.
182 *
183 * @param cls a `struct GNUNET_CADET_GetPath` operation
184 */
185static void
186reconnect (void *cls)
187{
188 struct GNUNET_CADET_GetPath *gp = cls;
189 struct GNUNET_MQ_MessageHandler handlers[] = {
190 GNUNET_MQ_hd_var_size (get_path,
191 GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_PATH,
192 struct GNUNET_CADET_LocalInfoPath,
193 gp),
194 GNUNET_MQ_hd_fixed_size (get_path_end,
195 GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_PATH_END,
196 struct GNUNET_MessageHeader,
197 gp),
198 GNUNET_MQ_handler_end ()
199 };
200 struct GNUNET_CADET_RequestPathInfoMessage *msg;
201 struct GNUNET_MQ_Envelope *env;
202
203 gp->reconnect_task = NULL;
204 gp->mq = GNUNET_CLIENT_connect (gp->cfg,
205 "cadet",
206 handlers,
207 &error_handler,
208 gp);
209 if (NULL == gp->mq)
210 return;
211 env = GNUNET_MQ_msg (msg,
212 GNUNET_MESSAGE_TYPE_CADET_LOCAL_REQUEST_INFO_PATH);
213 msg->peer = gp->id;
214 GNUNET_MQ_send (gp->mq,
215 env);
216}
217
218
219/**
220 * Request information about paths known to the running cadet peer.
221 *
222 * @param cfg configuration to use
223 * @param id Peer whose paths to examine.
224 * @param callback Function to call with the requested data.
225 * @param callback_cls Closure for @c callback.
226 * @return NULL on error
227 */
228struct GNUNET_CADET_GetPath *
229GNUNET_CADET_get_path (const struct GNUNET_CONFIGURATION_Handle *cfg,
230 const struct GNUNET_PeerIdentity *id,
231 GNUNET_CADET_PathCB callback,
232 void *callback_cls)
233{
234 struct GNUNET_CADET_GetPath *gp;
235
236 if (NULL == callback)
237 {
238 GNUNET_break (0);
239 return NULL;
240 }
241 gp = GNUNET_new (struct GNUNET_CADET_GetPath);
242 gp->path_cb = callback;
243 gp->path_cb_cls = callback_cls;
244 gp->cfg = cfg;
245 gp->id = *id;
246 reconnect (gp);
247 if (NULL == gp->mq)
248 {
249 GNUNET_free (gp);
250 return NULL;
251 }
252 return gp;
253}
254
255
256/**
257 * Cancel @a gp operation.
258 *
259 * @param gp operation to cancel
260 * @return closure from #GNUNET_CADET_get_path().
261 */
262void *
263GNUNET_CADET_get_path_cancel (struct GNUNET_CADET_GetPath *gp)
264{
265 void *ret = gp->path_cb_cls;
266
267 if (NULL != gp->mq)
268 GNUNET_MQ_destroy (gp->mq);
269 if (NULL != gp->reconnect_task)
270 GNUNET_SCHEDULER_cancel (gp->reconnect_task);
271 GNUNET_free (gp);
272 return ret;
273}
274
275
276/* end of cadet_api_get_path.c */
generated by cgit v1.2.3 (git 2.39.1) at 2024-04-24 02:55:41 +0000