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author | Christian Grothoff <christian@grothoff.org> | 2014-06-22 20:08:16 +0000 |
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committer | Christian Grothoff <christian@grothoff.org> | 2014-06-22 20:08:16 +0000 |
commit | eeaa12c3dbd18925c1177cfc66f52711b612fd9e (patch) | |
tree | 012f822b6d20f324f68ea29d9fe2237a0716935e /src/transport/transport_api_monitor_validation.c | |
parent | 194669680385bd40ce7c84b11021b21b6ed6d295 (diff) | |
download | gnunet-eeaa12c3dbd18925c1177cfc66f52711b612fd9e.tar.gz gnunet-eeaa12c3dbd18925c1177cfc66f52711b612fd9e.zip |
-split up transport_api_monitoring into monitor_peers and monitor_validation
Diffstat (limited to 'src/transport/transport_api_monitor_validation.c')
-rw-r--r-- | src/transport/transport_api_monitor_validation.c | 424 |
1 files changed, 424 insertions, 0 deletions
diff --git a/src/transport/transport_api_monitor_validation.c b/src/transport/transport_api_monitor_validation.c new file mode 100644 index 000000000..621a6b00e --- /dev/null +++ b/src/transport/transport_api_monitor_validation.c | |||
@@ -0,0 +1,424 @@ | |||
1 | /* | ||
2 | This file is part of GNUnet. | ||
3 | (C) 2009, 2010 Christian Grothoff (and other contributing authors) | ||
4 | |||
5 | GNUnet is free software; you can redistribute it and/or modify | ||
6 | it under the terms of the GNU General Public License as published | ||
7 | by the Free Software Foundation; either version 3, or (at your | ||
8 | 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 | General Public License for more details. | ||
14 | |||
15 | You should have received a copy of the GNU General Public License | ||
16 | along with GNUnet; see the file COPYING. If not, write to the | ||
17 | Free Software Foundation, Inc., 59 Temple Place - Suite 330, | ||
18 | Boston, MA 02111-1307, USA. | ||
19 | */ | ||
20 | |||
21 | /** | ||
22 | * @file transport/transport_api_monitor_validation.c | ||
23 | * @brief montoring api for validation status | ||
24 | * | ||
25 | * This api provides the ability to query the transport service about | ||
26 | * the status of address validation. | ||
27 | */ | ||
28 | #include "platform.h" | ||
29 | #include "gnunet_util_lib.h" | ||
30 | #include "gnunet_arm_service.h" | ||
31 | #include "gnunet_hello_lib.h" | ||
32 | #include "gnunet_protocols.h" | ||
33 | #include "gnunet_transport_service.h" | ||
34 | #include "transport.h" | ||
35 | |||
36 | |||
37 | /** | ||
38 | * Context for the address lookup. | ||
39 | */ | ||
40 | struct GNUNET_TRANSPORT_ValidationMonitoringContext | ||
41 | { | ||
42 | /** | ||
43 | * Function to call with the binary address. | ||
44 | */ | ||
45 | GNUNET_TRANSPORT_ValidationIterateCallback cb; | ||
46 | |||
47 | /** | ||
48 | * Closure for @e cb. | ||
49 | */ | ||
50 | void *cb_cls; | ||
51 | |||
52 | /** | ||
53 | * Connection to the service. | ||
54 | */ | ||
55 | struct GNUNET_CLIENT_Connection *client; | ||
56 | |||
57 | /** | ||
58 | * Configuration we use. | ||
59 | */ | ||
60 | const struct GNUNET_CONFIGURATION_Handle *cfg; | ||
61 | |||
62 | /** | ||
63 | * When should this operation time out? | ||
64 | */ | ||
65 | struct GNUNET_TIME_Absolute timeout; | ||
66 | |||
67 | /** | ||
68 | * Backoff for reconnect. | ||
69 | */ | ||
70 | struct GNUNET_TIME_Relative backoff; | ||
71 | |||
72 | /** | ||
73 | * Task ID for reconnect. | ||
74 | */ | ||
75 | GNUNET_SCHEDULER_TaskIdentifier reconnect_task; | ||
76 | |||
77 | /** | ||
78 | * Identity of the peer to monitor. | ||
79 | */ | ||
80 | struct GNUNET_PeerIdentity peer; | ||
81 | |||
82 | /** | ||
83 | * Was this a one-shot request? | ||
84 | */ | ||
85 | int one_shot; | ||
86 | }; | ||
87 | |||
88 | |||
89 | /** | ||
90 | * Convert validation state to human-readable string. | ||
91 | * | ||
92 | * @param state the state value | ||
93 | * @return corresponding string | ||
94 | */ | ||
95 | const char * | ||
96 | GNUNET_TRANSPORT_vs2s (enum GNUNET_TRANSPORT_ValidationState state) | ||
97 | { | ||
98 | switch (state) | ||
99 | { | ||
100 | case GNUNET_TRANSPORT_VS_NONE: | ||
101 | return "NONE"; | ||
102 | case GNUNET_TRANSPORT_VS_NEW: | ||
103 | return "NEW"; | ||
104 | case GNUNET_TRANSPORT_VS_REMOVE: | ||
105 | return "REMOVE"; | ||
106 | case GNUNET_TRANSPORT_VS_TIMEOUT: | ||
107 | return "TIMEOUT"; | ||
108 | case GNUNET_TRANSPORT_VS_UPDATE: | ||
109 | return "UPDATE"; | ||
110 | default: | ||
111 | GNUNET_break (0); | ||
112 | return "UNDEFINED"; | ||
113 | } | ||
114 | } | ||
115 | |||
116 | |||
117 | /** | ||
118 | * Function called with responses from the service. | ||
119 | * | ||
120 | * @param cls our `struct GNUNET_TRANSPORT_ValidationMonitoringContext *` | ||
121 | * @param msg NULL on timeout or error, otherwise presumably a | ||
122 | * message with the human-readable address | ||
123 | */ | ||
124 | static void | ||
125 | val_response_processor (void *cls, | ||
126 | const struct GNUNET_MessageHeader *msg); | ||
127 | |||
128 | |||
129 | /** | ||
130 | * Send our subscription request to the service. | ||
131 | * | ||
132 | * @param val_ctx our context | ||
133 | */ | ||
134 | static void | ||
135 | send_val_mon_request (struct GNUNET_TRANSPORT_ValidationMonitoringContext *val_ctx) | ||
136 | { | ||
137 | struct ValidationMonitorMessage msg; | ||
138 | |||
139 | msg.header.size = htons (sizeof (struct ValidationMonitorMessage)); | ||
140 | msg.header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_MONITOR_VALIDATION_REQUEST); | ||
141 | msg.one_shot = htonl (val_ctx->one_shot); | ||
142 | msg.peer = val_ctx->peer; | ||
143 | GNUNET_assert (GNUNET_OK == | ||
144 | GNUNET_CLIENT_transmit_and_get_response (val_ctx->client, | ||
145 | &msg.header, | ||
146 | GNUNET_TIME_absolute_get_remaining (val_ctx->timeout), | ||
147 | GNUNET_YES, | ||
148 | &val_response_processor, | ||
149 | val_ctx)); | ||
150 | } | ||
151 | |||
152 | |||
153 | /** | ||
154 | * Task run to re-establish the connection. | ||
155 | * | ||
156 | * @param cls our `struct GNUNET_TRANSPORT_ValidationMonitoringContext *` | ||
157 | * @param tc scheduler context, unused | ||
158 | */ | ||
159 | static void | ||
160 | do_val_connect (void *cls, | ||
161 | const struct GNUNET_SCHEDULER_TaskContext *tc) | ||
162 | { | ||
163 | struct GNUNET_TRANSPORT_ValidationMonitoringContext *val_ctx = cls; | ||
164 | |||
165 | val_ctx->reconnect_task = GNUNET_SCHEDULER_NO_TASK; | ||
166 | val_ctx->client = GNUNET_CLIENT_connect ("transport", val_ctx->cfg); | ||
167 | GNUNET_assert (NULL != val_ctx->client); | ||
168 | send_val_mon_request (val_ctx); | ||
169 | } | ||
170 | |||
171 | |||
172 | /** | ||
173 | * Cut the existing connection and reconnect. | ||
174 | * | ||
175 | * @param val_ctx our context | ||
176 | */ | ||
177 | static void | ||
178 | reconnect_val_ctx (struct GNUNET_TRANSPORT_ValidationMonitoringContext *val_ctx) | ||
179 | { | ||
180 | GNUNET_assert (GNUNET_NO == val_ctx->one_shot); | ||
181 | GNUNET_CLIENT_disconnect (val_ctx->client); | ||
182 | val_ctx->client = NULL; | ||
183 | /* notify clients about (re)connect */ | ||
184 | val_ctx->cb (val_ctx->cb_cls, NULL, NULL, | ||
185 | GNUNET_TIME_UNIT_ZERO_ABS, GNUNET_TIME_UNIT_ZERO_ABS, | ||
186 | GNUNET_TIME_UNIT_ZERO_ABS, GNUNET_TRANSPORT_VS_TIMEOUT); | ||
187 | val_ctx->backoff = GNUNET_TIME_STD_BACKOFF (val_ctx->backoff); | ||
188 | val_ctx->reconnect_task = GNUNET_SCHEDULER_add_delayed (val_ctx->backoff, | ||
189 | &do_val_connect, | ||
190 | val_ctx); | ||
191 | } | ||
192 | |||
193 | |||
194 | /** | ||
195 | * Function called with responses from the service. | ||
196 | * | ||
197 | * @param cls our `struct GNUNET_TRANSPORT_ValidationMonitoringContext *` | ||
198 | * @param msg NULL on timeout or error, otherwise presumably a | ||
199 | * message with the human-readable address | ||
200 | */ | ||
201 | static void | ||
202 | val_response_processor (void *cls, | ||
203 | const struct GNUNET_MessageHeader *msg) | ||
204 | { | ||
205 | struct GNUNET_TRANSPORT_ValidationMonitoringContext *val_ctx = cls; | ||
206 | struct ValidationIterateResponseMessage *vr_msg; | ||
207 | struct GNUNET_HELLO_Address *address; | ||
208 | const char *addr; | ||
209 | const char *transport_name; | ||
210 | size_t size; | ||
211 | size_t tlen; | ||
212 | size_t alen; | ||
213 | |||
214 | if (NULL == msg) | ||
215 | { | ||
216 | if (val_ctx->one_shot) | ||
217 | { | ||
218 | /* Disconnect */ | ||
219 | val_ctx->cb (val_ctx->cb_cls, NULL, NULL, | ||
220 | GNUNET_TIME_UNIT_ZERO_ABS, GNUNET_TIME_UNIT_ZERO_ABS, | ||
221 | GNUNET_TIME_UNIT_ZERO_ABS, GNUNET_TRANSPORT_VS_TIMEOUT); | ||
222 | GNUNET_TRANSPORT_monitor_validation_entries_cancel (val_ctx); | ||
223 | } | ||
224 | else | ||
225 | { | ||
226 | reconnect_val_ctx (val_ctx); | ||
227 | } | ||
228 | return; | ||
229 | } | ||
230 | size = ntohs (msg->size); | ||
231 | GNUNET_break (ntohs (msg->type) == | ||
232 | GNUNET_MESSAGE_TYPE_TRANSPORT_MONITOR_VALIDATION_RESPONSE); | ||
233 | |||
234 | if (size == sizeof (struct GNUNET_MessageHeader)) | ||
235 | { | ||
236 | /* Done! */ | ||
237 | if (val_ctx->one_shot) | ||
238 | { | ||
239 | val_ctx->cb (val_ctx->cb_cls, NULL, NULL, | ||
240 | GNUNET_TIME_UNIT_ZERO_ABS, GNUNET_TIME_UNIT_ZERO_ABS, | ||
241 | GNUNET_TIME_UNIT_ZERO_ABS, GNUNET_TRANSPORT_VS_NONE); | ||
242 | GNUNET_TRANSPORT_monitor_validation_entries_cancel (val_ctx); | ||
243 | } | ||
244 | else | ||
245 | { | ||
246 | reconnect_val_ctx (val_ctx); | ||
247 | } | ||
248 | return; | ||
249 | } | ||
250 | |||
251 | if ((size < sizeof (struct ValidationIterateResponseMessage)) || | ||
252 | (ntohs (msg->type) != GNUNET_MESSAGE_TYPE_TRANSPORT_MONITOR_VALIDATION_RESPONSE)) | ||
253 | { | ||
254 | GNUNET_break (0); | ||
255 | if (val_ctx->one_shot) | ||
256 | { | ||
257 | val_ctx->cb (val_ctx->cb_cls, NULL, NULL, | ||
258 | GNUNET_TIME_UNIT_ZERO_ABS, GNUNET_TIME_UNIT_ZERO_ABS, | ||
259 | GNUNET_TIME_UNIT_ZERO_ABS, GNUNET_TRANSPORT_VS_NONE); | ||
260 | GNUNET_TRANSPORT_monitor_validation_entries_cancel (val_ctx); | ||
261 | } | ||
262 | else | ||
263 | { | ||
264 | reconnect_val_ctx (val_ctx); | ||
265 | } | ||
266 | return; | ||
267 | } | ||
268 | |||
269 | vr_msg = (struct ValidationIterateResponseMessage *) msg; | ||
270 | tlen = ntohl (vr_msg->pluginlen); | ||
271 | alen = ntohl (vr_msg->addrlen); | ||
272 | |||
273 | if (size != sizeof (struct ValidationIterateResponseMessage) + tlen + alen) | ||
274 | { | ||
275 | GNUNET_break (0); | ||
276 | if (val_ctx->one_shot) | ||
277 | { | ||
278 | val_ctx->cb (val_ctx->cb_cls, NULL, NULL, | ||
279 | GNUNET_TIME_UNIT_ZERO_ABS, GNUNET_TIME_UNIT_ZERO_ABS, | ||
280 | GNUNET_TIME_UNIT_ZERO_ABS, GNUNET_TRANSPORT_VS_NONE); | ||
281 | GNUNET_TRANSPORT_monitor_validation_entries_cancel (val_ctx); | ||
282 | } | ||
283 | else | ||
284 | { | ||
285 | reconnect_val_ctx (val_ctx); | ||
286 | } | ||
287 | return; | ||
288 | } | ||
289 | if ( (0 == tlen) && (0 == alen) ) | ||
290 | { | ||
291 | GNUNET_break (0); | ||
292 | if (val_ctx->one_shot) | ||
293 | { | ||
294 | val_ctx->cb (val_ctx->cb_cls, NULL, NULL, | ||
295 | GNUNET_TIME_UNIT_ZERO_ABS, GNUNET_TIME_UNIT_ZERO_ABS, | ||
296 | GNUNET_TIME_UNIT_ZERO_ABS, GNUNET_TRANSPORT_VS_NONE); | ||
297 | GNUNET_TRANSPORT_monitor_validation_entries_cancel (val_ctx); | ||
298 | } | ||
299 | else | ||
300 | { | ||
301 | reconnect_val_ctx (val_ctx); | ||
302 | } | ||
303 | return; | ||
304 | } | ||
305 | else | ||
306 | { | ||
307 | if (0 == tlen) | ||
308 | { | ||
309 | GNUNET_break (0); /* This must not happen: address without plugin */ | ||
310 | return; | ||
311 | } | ||
312 | addr = (const char *) &vr_msg[1]; | ||
313 | transport_name = &addr[alen]; | ||
314 | |||
315 | if (transport_name[tlen - 1] != '\0') | ||
316 | { | ||
317 | /* Corrupt plugin name */ | ||
318 | GNUNET_break (0); | ||
319 | if (val_ctx->one_shot) | ||
320 | { | ||
321 | val_ctx->cb (val_ctx->cb_cls, | ||
322 | NULL, NULL, | ||
323 | GNUNET_TIME_UNIT_ZERO_ABS, | ||
324 | GNUNET_TIME_UNIT_ZERO_ABS, | ||
325 | GNUNET_TIME_UNIT_ZERO_ABS, | ||
326 | GNUNET_TRANSPORT_VS_NONE); | ||
327 | GNUNET_TRANSPORT_monitor_validation_entries_cancel (val_ctx); | ||
328 | } | ||
329 | else | ||
330 | { | ||
331 | reconnect_val_ctx (val_ctx); | ||
332 | } | ||
333 | return; | ||
334 | } | ||
335 | |||
336 | /* notify client */ | ||
337 | address = GNUNET_HELLO_address_allocate (&vr_msg->peer, | ||
338 | transport_name, | ||
339 | addr, alen, | ||
340 | ntohl (vr_msg->local_address_info)); | ||
341 | val_ctx->cb (val_ctx->cb_cls, | ||
342 | &vr_msg->peer, | ||
343 | address, | ||
344 | GNUNET_TIME_absolute_ntoh (vr_msg->last_validation), | ||
345 | GNUNET_TIME_absolute_ntoh (vr_msg->valid_until), | ||
346 | GNUNET_TIME_absolute_ntoh (vr_msg->next_validation), | ||
347 | ntohl(vr_msg->state)); | ||
348 | GNUNET_HELLO_address_free (address); | ||
349 | } | ||
350 | /* expect more replies */ | ||
351 | GNUNET_CLIENT_receive (val_ctx->client, | ||
352 | &val_response_processor, | ||
353 | val_ctx, | ||
354 | GNUNET_TIME_absolute_get_remaining (val_ctx->timeout)); | ||
355 | } | ||
356 | |||
357 | |||
358 | /** | ||
359 | * Return information about pending address validation operations for a specific | ||
360 | * or all peers | ||
361 | * | ||
362 | * @param cfg configuration to use | ||
363 | * @param peer a specific peer identity to obtain validation entries for, | ||
364 | * NULL for all peers | ||
365 | * @param one_shot #GNUNET_YES to return all entries and then end (with NULL+NULL), | ||
366 | * #GNUNET_NO to monitor validation entries continuously | ||
367 | * @param timeout how long is the lookup allowed to take at most | ||
368 | * @param validation_callback function to call with the results | ||
369 | * @param validation_callback_cls closure for peer_address_callback | ||
370 | */ | ||
371 | struct GNUNET_TRANSPORT_ValidationMonitoringContext * | ||
372 | GNUNET_TRANSPORT_monitor_validation_entries (const struct GNUNET_CONFIGURATION_Handle *cfg, | ||
373 | const struct GNUNET_PeerIdentity *peer, | ||
374 | int one_shot, | ||
375 | struct GNUNET_TIME_Relative timeout, | ||
376 | GNUNET_TRANSPORT_ValidationIterateCallback validation_callback, | ||
377 | void *validation_callback_cls) | ||
378 | { | ||
379 | struct GNUNET_TRANSPORT_ValidationMonitoringContext *val_ctx; | ||
380 | struct GNUNET_CLIENT_Connection *client; | ||
381 | |||
382 | client = GNUNET_CLIENT_connect ("transport", cfg); | ||
383 | if (NULL == client) | ||
384 | return NULL; | ||
385 | if (GNUNET_YES != one_shot) | ||
386 | timeout = GNUNET_TIME_UNIT_FOREVER_REL; | ||
387 | val_ctx = GNUNET_new (struct GNUNET_TRANSPORT_ValidationMonitoringContext); | ||
388 | val_ctx->cb = validation_callback; | ||
389 | val_ctx->cb_cls = validation_callback_cls; | ||
390 | val_ctx->cfg = cfg; | ||
391 | val_ctx->timeout = GNUNET_TIME_relative_to_absolute (timeout); | ||
392 | if (NULL != peer) | ||
393 | val_ctx->peer = *peer; | ||
394 | val_ctx->one_shot = one_shot; | ||
395 | val_ctx->client = client; | ||
396 | send_val_mon_request (val_ctx); | ||
397 | |||
398 | return val_ctx; | ||
399 | } | ||
400 | |||
401 | |||
402 | /** | ||
403 | * Return information about all current pending validation operations | ||
404 | * | ||
405 | * @param vic handle for the request to cancel | ||
406 | */ | ||
407 | void | ||
408 | GNUNET_TRANSPORT_monitor_validation_entries_cancel (struct GNUNET_TRANSPORT_ValidationMonitoringContext *vic) | ||
409 | { | ||
410 | if (NULL != vic->client) | ||
411 | { | ||
412 | GNUNET_CLIENT_disconnect (vic->client); | ||
413 | vic->client = NULL; | ||
414 | } | ||
415 | if (GNUNET_SCHEDULER_NO_TASK != vic->reconnect_task) | ||
416 | { | ||
417 | GNUNET_SCHEDULER_cancel (vic->reconnect_task); | ||
418 | vic->reconnect_task = GNUNET_SCHEDULER_NO_TASK; | ||
419 | } | ||
420 | GNUNET_free (vic); | ||
421 | } | ||
422 | |||
423 | |||
424 | /* end of transport_api_monitor_validation.c */ | ||