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Diffstat (limited to 'src/transport/transport_api_hello_get.c')
-rw-r--r-- | src/transport/transport_api_hello_get.c | 274 |
1 files changed, 0 insertions, 274 deletions
diff --git a/src/transport/transport_api_hello_get.c b/src/transport/transport_api_hello_get.c deleted file mode 100644 index f8bcc5f07..000000000 --- a/src/transport/transport_api_hello_get.c +++ /dev/null | |||
@@ -1,274 +0,0 @@ | |||
1 | /* | ||
2 | This file is part of GNUnet. | ||
3 | Copyright (C) 2009-2013, 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 | /** | ||
22 | * @file transport/transport_api_hello_get.c | ||
23 | * @brief library to obtain our HELLO from our transport service | ||
24 | * @author Christian Grothoff | ||
25 | */ | ||
26 | #include "platform.h" | ||
27 | #include "gnunet_util_lib.h" | ||
28 | #include "gnunet_constants.h" | ||
29 | #include "gnunet_arm_service.h" | ||
30 | #include "gnunet_hello_lib.h" | ||
31 | #include "gnunet_protocols.h" | ||
32 | #include "gnunet_transport_hello_service.h" | ||
33 | #include "transport.h" | ||
34 | |||
35 | |||
36 | /** | ||
37 | * Functions to call with this peer's HELLO. | ||
38 | */ | ||
39 | struct GNUNET_TRANSPORT_HelloGetHandle | ||
40 | { | ||
41 | /** | ||
42 | * Our configuration. | ||
43 | */ | ||
44 | const struct GNUNET_CONFIGURATION_Handle *cfg; | ||
45 | |||
46 | /** | ||
47 | * Transport handle. | ||
48 | */ | ||
49 | struct GNUNET_MQ_Handle *mq; | ||
50 | |||
51 | /** | ||
52 | * Callback to call once we got our HELLO. | ||
53 | */ | ||
54 | GNUNET_TRANSPORT_HelloUpdateCallback rec; | ||
55 | |||
56 | /** | ||
57 | * Closure for @e rec. | ||
58 | */ | ||
59 | void *rec_cls; | ||
60 | |||
61 | /** | ||
62 | * Task for calling the HelloUpdateCallback when we already have a HELLO | ||
63 | */ | ||
64 | struct GNUNET_SCHEDULER_Task *notify_task; | ||
65 | |||
66 | /** | ||
67 | * ID of the task trying to reconnect to the service. | ||
68 | */ | ||
69 | struct GNUNET_SCHEDULER_Task *reconnect_task; | ||
70 | |||
71 | /** | ||
72 | * Delay until we try to reconnect. | ||
73 | */ | ||
74 | struct GNUNET_TIME_Relative reconnect_delay; | ||
75 | |||
76 | /** | ||
77 | * Type of HELLOs client cares about. | ||
78 | */ | ||
79 | enum GNUNET_TRANSPORT_AddressClass ac; | ||
80 | }; | ||
81 | |||
82 | |||
83 | /** | ||
84 | * Function we use for checking incoming HELLO messages. | ||
85 | * | ||
86 | * @param cls closure, a `struct GNUNET_TRANSPORT_Handle *` | ||
87 | * @param msg message received | ||
88 | * @return #GNUNET_OK if message is well-formed | ||
89 | */ | ||
90 | static int | ||
91 | check_hello (void *cls, | ||
92 | const struct GNUNET_MessageHeader *msg) | ||
93 | { | ||
94 | struct GNUNET_PeerIdentity me; | ||
95 | |||
96 | if (GNUNET_OK != | ||
97 | GNUNET_HELLO_get_id ((const struct GNUNET_HELLO_Message *) msg, | ||
98 | &me)) | ||
99 | { | ||
100 | GNUNET_break (0); | ||
101 | return GNUNET_SYSERR; | ||
102 | } | ||
103 | GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, | ||
104 | "Receiving (my own) HELLO message (%u bytes), I am `%s'.\n", | ||
105 | (unsigned int) ntohs (msg->size), | ||
106 | GNUNET_i2s (&me)); | ||
107 | return GNUNET_OK; | ||
108 | } | ||
109 | |||
110 | |||
111 | /** | ||
112 | * Function we use for handling incoming HELLO messages. | ||
113 | * | ||
114 | * @param cls closure, a `struct GNUNET_TRANSPORT_HelloGetHandle *` | ||
115 | * @param msg message received | ||
116 | */ | ||
117 | static void | ||
118 | handle_hello (void *cls, | ||
119 | const struct GNUNET_MessageHeader *msg) | ||
120 | { | ||
121 | struct GNUNET_TRANSPORT_HelloGetHandle *ghh = cls; | ||
122 | |||
123 | ghh->rec (ghh->rec_cls, | ||
124 | msg); | ||
125 | } | ||
126 | |||
127 | |||
128 | /** | ||
129 | * Function that will schedule the job that will try | ||
130 | * to connect us again to the client. | ||
131 | * | ||
132 | * @param ghh transport service to reconnect | ||
133 | */ | ||
134 | static void | ||
135 | schedule_reconnect (struct GNUNET_TRANSPORT_HelloGetHandle *ghh); | ||
136 | |||
137 | |||
138 | /** | ||
139 | * Generic error handler, called with the appropriate | ||
140 | * error code and the same closure specified at the creation of | ||
141 | * the message queue. | ||
142 | * Not every message queue implementation supports an error handler. | ||
143 | * | ||
144 | * @param cls closure with the `struct GNUNET_TRANSPORT_Handle *` | ||
145 | * @param error error code | ||
146 | */ | ||
147 | static void | ||
148 | mq_error_handler (void *cls, | ||
149 | enum GNUNET_MQ_Error error) | ||
150 | { | ||
151 | struct GNUNET_TRANSPORT_HelloGetHandle *ghh = cls; | ||
152 | |||
153 | GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, | ||
154 | "Error receiving from transport service, disconnecting temporarily.\n"); | ||
155 | GNUNET_MQ_destroy (ghh->mq); | ||
156 | ghh->mq = NULL; | ||
157 | schedule_reconnect (ghh); | ||
158 | } | ||
159 | |||
160 | |||
161 | /** | ||
162 | * Try again to connect to transport service. | ||
163 | * | ||
164 | * @param cls the handle to the transport service | ||
165 | */ | ||
166 | static void | ||
167 | reconnect (void *cls) | ||
168 | { | ||
169 | struct GNUNET_TRANSPORT_HelloGetHandle *ghh = cls; | ||
170 | struct GNUNET_MQ_MessageHandler handlers[] = { | ||
171 | GNUNET_MQ_hd_var_size (hello, | ||
172 | GNUNET_MESSAGE_TYPE_HELLO, | ||
173 | struct GNUNET_MessageHeader, | ||
174 | ghh), | ||
175 | GNUNET_MQ_handler_end () | ||
176 | }; | ||
177 | struct GNUNET_MQ_Envelope *env; | ||
178 | struct StartMessage *s; | ||
179 | |||
180 | ghh->reconnect_task = NULL; | ||
181 | GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, | ||
182 | "Connecting to transport service.\n"); | ||
183 | GNUNET_assert (NULL == ghh->mq); | ||
184 | ghh->mq = GNUNET_CLIENT_connect (ghh->cfg, | ||
185 | "transport", | ||
186 | handlers, | ||
187 | &mq_error_handler, | ||
188 | ghh); | ||
189 | if (NULL == ghh->mq) | ||
190 | return; | ||
191 | env = GNUNET_MQ_msg (s, | ||
192 | GNUNET_MESSAGE_TYPE_TRANSPORT_START); | ||
193 | s->options = htonl (0); | ||
194 | GNUNET_MQ_send (ghh->mq, | ||
195 | env); | ||
196 | } | ||
197 | |||
198 | |||
199 | /** | ||
200 | * Function that will schedule the job that will try | ||
201 | * to connect us again to the client. | ||
202 | * | ||
203 | * @param ghh transport service to reconnect | ||
204 | */ | ||
205 | static void | ||
206 | schedule_reconnect (struct GNUNET_TRANSPORT_HelloGetHandle *ghh) | ||
207 | { | ||
208 | ghh->reconnect_task = | ||
209 | GNUNET_SCHEDULER_add_delayed (ghh->reconnect_delay, | ||
210 | &reconnect, | ||
211 | ghh); | ||
212 | ghh->reconnect_delay = GNUNET_TIME_STD_BACKOFF (ghh->reconnect_delay); | ||
213 | } | ||
214 | |||
215 | |||
216 | /** | ||
217 | * Obtain the HELLO message for this peer. The callback given in this function | ||
218 | * is never called synchronously. | ||
219 | * | ||
220 | * @param cfg configuration | ||
221 | * @param ac which network type should the addresses from the HELLO belong to? | ||
222 | * @param rec function to call with the HELLO, sender will be our peer | ||
223 | * identity; message and sender will be NULL on timeout | ||
224 | * (handshake with transport service pending/failed). | ||
225 | * cost estimate will be 0. | ||
226 | * @param rec_cls closure for @a rec | ||
227 | * @return handle to cancel the operation | ||
228 | */ | ||
229 | struct GNUNET_TRANSPORT_HelloGetHandle * | ||
230 | GNUNET_TRANSPORT_hello_get (const struct GNUNET_CONFIGURATION_Handle *cfg, | ||
231 | enum GNUNET_TRANSPORT_AddressClass ac, | ||
232 | GNUNET_TRANSPORT_HelloUpdateCallback rec, | ||
233 | void *rec_cls) | ||
234 | { | ||
235 | struct GNUNET_TRANSPORT_HelloGetHandle *ghh; | ||
236 | |||
237 | ghh = GNUNET_new (struct GNUNET_TRANSPORT_HelloGetHandle); | ||
238 | ghh->rec = rec; | ||
239 | ghh->rec_cls = rec_cls; | ||
240 | ghh->cfg = cfg; | ||
241 | ghh->ac = ac; | ||
242 | reconnect (ghh); | ||
243 | if (NULL == ghh->mq) | ||
244 | { | ||
245 | GNUNET_free (ghh); | ||
246 | return NULL; | ||
247 | } | ||
248 | return ghh; | ||
249 | } | ||
250 | |||
251 | |||
252 | /** | ||
253 | * Stop receiving updates about changes to our HELLO message. | ||
254 | * | ||
255 | * @param ghh handle to cancel | ||
256 | */ | ||
257 | void | ||
258 | GNUNET_TRANSPORT_hello_get_cancel (struct GNUNET_TRANSPORT_HelloGetHandle *ghh) | ||
259 | { | ||
260 | if (NULL != ghh->reconnect_task) | ||
261 | { | ||
262 | GNUNET_SCHEDULER_cancel (ghh->reconnect_task); | ||
263 | ghh->reconnect_task = NULL; | ||
264 | } | ||
265 | if (NULL != ghh->mq) | ||
266 | { | ||
267 | GNUNET_MQ_destroy (ghh->mq); | ||
268 | ghh->mq = NULL; | ||
269 | } | ||
270 | GNUNET_free (ghh); | ||
271 | } | ||
272 | |||
273 | |||
274 | /* end of transport_api_hello_get.c */ | ||