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Diffstat (limited to 'src/cadet/cadet_api_get_tunnel.c')
-rw-r--r-- | src/cadet/cadet_api_get_tunnel.c | 279 |
1 files changed, 0 insertions, 279 deletions
diff --git a/src/cadet/cadet_api_get_tunnel.c b/src/cadet/cadet_api_get_tunnel.c deleted file mode 100644 index 1d2776352..000000000 --- a/src/cadet/cadet_api_get_tunnel.c +++ /dev/null | |||
@@ -1,279 +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_tunnel.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 | */ | ||
37 | struct GNUNET_CADET_GetTunnel | ||
38 | { | ||
39 | |||
40 | /** | ||
41 | * Monitor callback | ||
42 | */ | ||
43 | GNUNET_CADET_TunnelCB callback; | ||
44 | |||
45 | /** | ||
46 | * Closure for @e callback. | ||
47 | */ | ||
48 | void *callback_cls; | ||
49 | |||
50 | /** | ||
51 | * Message queue to talk to CADET service. | ||
52 | */ | ||
53 | struct GNUNET_MQ_Handle *mq; | ||
54 | |||
55 | /** | ||
56 | * Configuration we use. | ||
57 | */ | ||
58 | const struct GNUNET_CONFIGURATION_Handle *cfg; | ||
59 | |||
60 | /** | ||
61 | * Task to reconnect. | ||
62 | */ | ||
63 | struct GNUNET_SCHEDULER_Task *reconnect_task; | ||
64 | |||
65 | /** | ||
66 | * Backoff for reconnect attempts. | ||
67 | */ | ||
68 | struct GNUNET_TIME_Relative backoff; | ||
69 | |||
70 | /** | ||
71 | * Peer we want information about. | ||
72 | */ | ||
73 | struct GNUNET_PeerIdentity id; | ||
74 | }; | ||
75 | |||
76 | |||
77 | |||
78 | /** | ||
79 | * Check that message received from CADET service is well-formed. | ||
80 | * | ||
81 | * @param cls the `struct GNUNET_CADET_Handle` | ||
82 | * @param msg the message we got | ||
83 | * @return #GNUNET_OK if the message is well-formed, | ||
84 | * #GNUNET_SYSERR otherwise | ||
85 | */ | ||
86 | static int | ||
87 | check_get_tunnel (void *cls, | ||
88 | const struct GNUNET_CADET_LocalInfoTunnel *msg) | ||
89 | { | ||
90 | unsigned int ch_n; | ||
91 | unsigned int c_n; | ||
92 | size_t esize; | ||
93 | size_t msize; | ||
94 | |||
95 | (void) cls; | ||
96 | /* Verify message sanity */ | ||
97 | msize = ntohs (msg->header.size); | ||
98 | esize = sizeof (struct GNUNET_CADET_LocalInfoTunnel); | ||
99 | if (esize > msize) | ||
100 | { | ||
101 | GNUNET_break (0); | ||
102 | return GNUNET_SYSERR; | ||
103 | } | ||
104 | ch_n = ntohl (msg->channels); | ||
105 | c_n = ntohl (msg->connections); | ||
106 | esize += ch_n * sizeof (struct GNUNET_CADET_ChannelTunnelNumber); | ||
107 | esize += c_n * sizeof (struct GNUNET_CADET_ConnectionTunnelIdentifier); | ||
108 | if (msize != esize) | ||
109 | { | ||
110 | GNUNET_break_op (0); | ||
111 | GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, | ||
112 | "m:%u, e: %u (%u ch, %u conn)\n", | ||
113 | (unsigned int) msize, | ||
114 | (unsigned int) esize, | ||
115 | ch_n, | ||
116 | c_n); | ||
117 | return GNUNET_SYSERR; | ||
118 | } | ||
119 | return GNUNET_OK; | ||
120 | } | ||
121 | |||
122 | |||
123 | /** | ||
124 | * Process a local tunnel info reply, pass info to the user. | ||
125 | * | ||
126 | * @param cls a `struct GNUNET_CADET_GetTunnel *` | ||
127 | * @param msg Message itself. | ||
128 | */ | ||
129 | static void | ||
130 | handle_get_tunnel (void *cls, | ||
131 | const struct GNUNET_CADET_LocalInfoTunnel *msg) | ||
132 | { | ||
133 | struct GNUNET_CADET_GetTunnel *gt = cls; | ||
134 | unsigned int ch_n; | ||
135 | unsigned int c_n; | ||
136 | const struct GNUNET_CADET_ConnectionTunnelIdentifier *conns; | ||
137 | const struct GNUNET_CADET_ChannelTunnelNumber *chns; | ||
138 | |||
139 | ch_n = ntohl (msg->channels); | ||
140 | c_n = ntohl (msg->connections); | ||
141 | |||
142 | /* Call Callback with tunnel info. */ | ||
143 | conns = (const struct GNUNET_CADET_ConnectionTunnelIdentifier *) &msg[1]; | ||
144 | chns = (const struct GNUNET_CADET_ChannelTunnelNumber *) &conns[c_n]; | ||
145 | gt->callback (gt->callback_cls, | ||
146 | &msg->destination, | ||
147 | ch_n, | ||
148 | c_n, | ||
149 | chns, | ||
150 | conns, | ||
151 | ntohs (msg->estate), | ||
152 | ntohs (msg->cstate)); | ||
153 | GNUNET_CADET_get_tunnel_cancel (gt); | ||
154 | } | ||
155 | |||
156 | |||
157 | /** | ||
158 | * Reconnect to the service and try again. | ||
159 | * | ||
160 | * @param cls a `struct GNUNET_CADET_GetTunnel` operation | ||
161 | */ | ||
162 | static void | ||
163 | reconnect (void *cls); | ||
164 | |||
165 | |||
166 | /** | ||
167 | * Function called on connection trouble. Reconnects. | ||
168 | * | ||
169 | * @param cls a `struct GNUNET_CADET_GetTunnel` | ||
170 | * @param error error code from MQ | ||
171 | */ | ||
172 | static void | ||
173 | error_handler (void *cls, | ||
174 | enum GNUNET_MQ_Error error) | ||
175 | { | ||
176 | struct GNUNET_CADET_GetTunnel *gt = cls; | ||
177 | |||
178 | GNUNET_MQ_destroy (gt->mq); | ||
179 | gt->mq = NULL; | ||
180 | gt->backoff = GNUNET_TIME_randomized_backoff (gt->backoff, | ||
181 | GNUNET_TIME_UNIT_MINUTES); | ||
182 | gt->reconnect_task = GNUNET_SCHEDULER_add_delayed (gt->backoff, | ||
183 | &reconnect, | ||
184 | gt); | ||
185 | } | ||
186 | |||
187 | |||
188 | /** | ||
189 | * Reconnect to the service and try again. | ||
190 | * | ||
191 | * @param cls a `struct GNUNET_CADET_GetTunnel` operation | ||
192 | */ | ||
193 | static void | ||
194 | reconnect (void *cls) | ||
195 | { | ||
196 | struct GNUNET_CADET_GetTunnel *gt = cls; | ||
197 | struct GNUNET_MQ_MessageHandler handlers[] = { | ||
198 | GNUNET_MQ_hd_var_size (get_tunnel, | ||
199 | GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_TUNNEL, | ||
200 | struct GNUNET_CADET_LocalInfoTunnel, | ||
201 | gt), | ||
202 | GNUNET_MQ_handler_end () | ||
203 | }; | ||
204 | struct GNUNET_MQ_Envelope *env; | ||
205 | struct GNUNET_CADET_LocalInfo *msg; | ||
206 | |||
207 | gt->reconnect_task = NULL; | ||
208 | gt->mq = GNUNET_CLIENT_connect (gt->cfg, | ||
209 | "cadet", | ||
210 | handlers, | ||
211 | &error_handler, | ||
212 | gt); | ||
213 | if (NULL == gt->mq) | ||
214 | return; | ||
215 | env = GNUNET_MQ_msg (msg, | ||
216 | GNUNET_MESSAGE_TYPE_CADET_LOCAL_INFO_TUNNEL); | ||
217 | msg->peer = gt->id; | ||
218 | GNUNET_MQ_send (gt->mq, | ||
219 | env); | ||
220 | } | ||
221 | |||
222 | /** | ||
223 | * Request information about a tunnel of the running cadet peer. | ||
224 | * The callback will be called for the tunnel once. | ||
225 | * | ||
226 | * @param cfg configuration to use | ||
227 | * @param id Peer whose tunnel to examine. | ||
228 | * @param callback Function to call with the requested data. | ||
229 | * @param callback_cls Closure for @c callback. | ||
230 | * @return NULL on error | ||
231 | */ | ||
232 | struct GNUNET_CADET_GetTunnel * | ||
233 | GNUNET_CADET_get_tunnel (const struct GNUNET_CONFIGURATION_Handle *cfg, | ||
234 | const struct GNUNET_PeerIdentity *id, | ||
235 | GNUNET_CADET_TunnelCB callback, | ||
236 | void *callback_cls) | ||
237 | { | ||
238 | struct GNUNET_CADET_GetTunnel *gt; | ||
239 | |||
240 | if (NULL == callback) | ||
241 | { | ||
242 | GNUNET_break (0); | ||
243 | return NULL; | ||
244 | } | ||
245 | gt = GNUNET_new (struct GNUNET_CADET_GetTunnel); | ||
246 | gt->callback = callback; | ||
247 | gt->callback_cls = callback_cls; | ||
248 | gt->cfg = cfg; | ||
249 | gt->id = *id; | ||
250 | reconnect (gt); | ||
251 | if (NULL == gt->mq) | ||
252 | { | ||
253 | GNUNET_free (gt); | ||
254 | return NULL; | ||
255 | } | ||
256 | return gt; | ||
257 | } | ||
258 | |||
259 | |||
260 | /** | ||
261 | * Cancel a monitor request. The monitor callback will not be called. | ||
262 | * | ||
263 | * @param lt operation handle | ||
264 | * @return Closure given to #GNUNET_CADET_get_tunnel(), if any. | ||
265 | */ | ||
266 | void * | ||
267 | GNUNET_CADET_get_tunnel_cancel (struct GNUNET_CADET_GetTunnel *gt) | ||
268 | { | ||
269 | void *ret = gt->callback_cls; | ||
270 | |||
271 | if (NULL != gt->mq) | ||
272 | GNUNET_MQ_destroy (gt->mq); | ||
273 | if (NULL != gt->reconnect_task) | ||
274 | GNUNET_SCHEDULER_cancel (gt->reconnect_task); | ||
275 | GNUNET_free (gt); | ||
276 | return ret; | ||
277 | } | ||
278 | |||
279 | /* end of cadet_api_get_tunnel.c */ | ||