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author | Matthias Wachs <wachs@net.in.tum.de> | 2014-01-07 16:00:27 +0000 |
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committer | Matthias Wachs <wachs@net.in.tum.de> | 2014-01-07 16:00:27 +0000 |
commit | cfa7d229b27b9c387351c9bf3c8a9eb7994de13a (patch) | |
tree | 4fc0eba5eb000ed230d110cd79b5fe2933d11e97 /src/transport/transport_api_address_lookup.c | |
parent | f4c6b450aa848628fb07d0a9ede9465a81090691 (diff) | |
download | gnunet-cfa7d229b27b9c387351c9bf3c8a9eb7994de13a.tar.gz gnunet-cfa7d229b27b9c387351c9bf3c8a9eb7994de13a.zip |
new monitoring API
Diffstat (limited to 'src/transport/transport_api_address_lookup.c')
-rw-r--r-- | src/transport/transport_api_address_lookup.c | 364 |
1 files changed, 0 insertions, 364 deletions
diff --git a/src/transport/transport_api_address_lookup.c b/src/transport/transport_api_address_lookup.c deleted file mode 100644 index d547b8ed8..000000000 --- a/src/transport/transport_api_address_lookup.c +++ /dev/null | |||
@@ -1,364 +0,0 @@ | |||
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_address_lookup.c | ||
23 | * @brief given a peer id, get all known addresses from transport service | ||
24 | * | ||
25 | * This api provides the ability to query the transport service about | ||
26 | * the status of connections to a specific peer. Calls back with a | ||
27 | * pretty printed string of the address, as formatted by the appropriate | ||
28 | * transport plugin, and whether or not the address given is currently | ||
29 | * in the 'connected' state (according to the transport service). | ||
30 | */ | ||
31 | #include "platform.h" | ||
32 | #include "gnunet_util_lib.h" | ||
33 | #include "gnunet_arm_service.h" | ||
34 | #include "gnunet_hello_lib.h" | ||
35 | #include "gnunet_protocols.h" | ||
36 | #include "gnunet_transport_service.h" | ||
37 | #include "transport.h" | ||
38 | |||
39 | /** | ||
40 | * Context for the address lookup. | ||
41 | */ | ||
42 | struct GNUNET_TRANSPORT_PeerIterateContext | ||
43 | { | ||
44 | /** | ||
45 | * Function to call with the binary address. | ||
46 | */ | ||
47 | GNUNET_TRANSPORT_PeerIterateCallback cb; | ||
48 | |||
49 | /** | ||
50 | * Closure for cb. | ||
51 | */ | ||
52 | void *cb_cls; | ||
53 | |||
54 | /** | ||
55 | * Connection to the service. | ||
56 | */ | ||
57 | struct GNUNET_CLIENT_Connection *client; | ||
58 | |||
59 | /** | ||
60 | * Configuration we use. | ||
61 | */ | ||
62 | const struct GNUNET_CONFIGURATION_Handle *cfg; | ||
63 | |||
64 | /** | ||
65 | * When should this operation time out? | ||
66 | */ | ||
67 | struct GNUNET_TIME_Absolute timeout; | ||
68 | |||
69 | /** | ||
70 | * Backoff for reconnect. | ||
71 | */ | ||
72 | struct GNUNET_TIME_Relative backoff; | ||
73 | |||
74 | /** | ||
75 | * Task ID for reconnect. | ||
76 | */ | ||
77 | GNUNET_SCHEDULER_TaskIdentifier reconnect_task; | ||
78 | |||
79 | /** | ||
80 | * Identity of the peer to monitor. | ||
81 | */ | ||
82 | struct GNUNET_PeerIdentity peer; | ||
83 | |||
84 | /** | ||
85 | * Was this a one-shot request? | ||
86 | */ | ||
87 | int one_shot; | ||
88 | }; | ||
89 | |||
90 | |||
91 | /** | ||
92 | * Function called with responses from the service. | ||
93 | * | ||
94 | * @param cls our 'struct GNUNET_TRANSPORT_PeerAddressLookupContext*' | ||
95 | * @param msg NULL on timeout or error, otherwise presumably a | ||
96 | * message with the human-readable address | ||
97 | */ | ||
98 | static void | ||
99 | peer_address_response_processor (void *cls, | ||
100 | const struct GNUNET_MessageHeader *msg); | ||
101 | |||
102 | |||
103 | /** | ||
104 | * Send our subscription request to the service. | ||
105 | * | ||
106 | * @param pal_ctx our context | ||
107 | */ | ||
108 | static void | ||
109 | send_request (struct GNUNET_TRANSPORT_PeerIterateContext *pal_ctx) | ||
110 | { | ||
111 | struct AddressIterateMessage msg; | ||
112 | |||
113 | msg.header.size = htons (sizeof (struct AddressIterateMessage)); | ||
114 | msg.header.type = htons (GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_ITERATE); | ||
115 | msg.one_shot = htonl (pal_ctx->one_shot); | ||
116 | msg.timeout = GNUNET_TIME_absolute_hton (pal_ctx->timeout); | ||
117 | msg.peer = pal_ctx->peer; | ||
118 | GNUNET_assert (GNUNET_OK == | ||
119 | GNUNET_CLIENT_transmit_and_get_response (pal_ctx->client, | ||
120 | &msg.header, | ||
121 | GNUNET_TIME_absolute_get_remaining (pal_ctx->timeout), | ||
122 | GNUNET_YES, | ||
123 | &peer_address_response_processor, | ||
124 | pal_ctx)); | ||
125 | } | ||
126 | |||
127 | /** | ||
128 | * Task run to re-establish the connection. | ||
129 | * | ||
130 | * @param cls our 'struct GNUNET_TRANSPORT_PeerAddressLookupContext*' | ||
131 | * @param tc scheduler context, unused | ||
132 | */ | ||
133 | static void | ||
134 | do_connect (void *cls, | ||
135 | const struct GNUNET_SCHEDULER_TaskContext *tc) | ||
136 | { | ||
137 | struct GNUNET_TRANSPORT_PeerIterateContext *pal_ctx = cls; | ||
138 | |||
139 | pal_ctx->reconnect_task = GNUNET_SCHEDULER_NO_TASK; | ||
140 | pal_ctx->client = GNUNET_CLIENT_connect ("transport", pal_ctx->cfg); | ||
141 | GNUNET_assert (NULL != pal_ctx->client); | ||
142 | send_request (pal_ctx); | ||
143 | } | ||
144 | |||
145 | |||
146 | /** | ||
147 | * Cut the existing connection and reconnect. | ||
148 | * | ||
149 | * @param pal_ctx our context | ||
150 | */ | ||
151 | static void | ||
152 | reconnect (struct GNUNET_TRANSPORT_PeerIterateContext *pal_ctx) | ||
153 | { | ||
154 | GNUNET_assert (GNUNET_NO == pal_ctx->one_shot); | ||
155 | GNUNET_CLIENT_disconnect (pal_ctx->client); | ||
156 | pal_ctx->client = NULL; | ||
157 | pal_ctx->backoff = GNUNET_TIME_STD_BACKOFF (pal_ctx->backoff); | ||
158 | pal_ctx->reconnect_task = GNUNET_SCHEDULER_add_delayed (pal_ctx->backoff, | ||
159 | &do_connect, | ||
160 | pal_ctx); | ||
161 | } | ||
162 | |||
163 | |||
164 | /** | ||
165 | * Function called with responses from the service. | ||
166 | * | ||
167 | * @param cls our 'struct GNUNET_TRANSPORT_PeerAddressLookupContext*' | ||
168 | * @param msg NULL on timeout or error, otherwise presumably a | ||
169 | * message with the human-readable address | ||
170 | */ | ||
171 | static void | ||
172 | peer_address_response_processor (void *cls, | ||
173 | const struct GNUNET_MessageHeader *msg) | ||
174 | { | ||
175 | struct GNUNET_TRANSPORT_PeerIterateContext *pal_ctx = cls; | ||
176 | struct AddressIterateResponseMessage *air_msg; | ||
177 | struct GNUNET_HELLO_Address *address; | ||
178 | const char *addr; | ||
179 | const char *transport_name; | ||
180 | uint16_t size; | ||
181 | size_t alen; | ||
182 | size_t tlen; | ||
183 | |||
184 | if (msg == NULL) | ||
185 | { | ||
186 | if (pal_ctx->one_shot) | ||
187 | { | ||
188 | pal_ctx->cb (pal_ctx->cb_cls, NULL, NULL); | ||
189 | GNUNET_TRANSPORT_peer_get_active_addresses_cancel (pal_ctx); | ||
190 | } | ||
191 | else | ||
192 | { | ||
193 | reconnect (pal_ctx); | ||
194 | } | ||
195 | return; | ||
196 | } | ||
197 | size = ntohs (msg->size); | ||
198 | GNUNET_break (ntohs (msg->type) == | ||
199 | GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_ITERATE_RESPONSE); | ||
200 | if (size == sizeof (struct GNUNET_MessageHeader)) | ||
201 | { | ||
202 | /* done! */ | ||
203 | if (pal_ctx->one_shot) | ||
204 | { | ||
205 | pal_ctx->cb (pal_ctx->cb_cls, NULL, NULL); | ||
206 | GNUNET_TRANSPORT_peer_get_active_addresses_cancel (pal_ctx); | ||
207 | } | ||
208 | else | ||
209 | { | ||
210 | reconnect (pal_ctx); | ||
211 | } | ||
212 | return; | ||
213 | } | ||
214 | |||
215 | if ((size < sizeof (struct AddressIterateResponseMessage)) || | ||
216 | (ntohs (msg->type) != | ||
217 | GNUNET_MESSAGE_TYPE_TRANSPORT_ADDRESS_ITERATE_RESPONSE)) | ||
218 | { | ||
219 | GNUNET_break (0); | ||
220 | if (pal_ctx->one_shot) | ||
221 | { | ||
222 | pal_ctx->cb (pal_ctx->cb_cls, NULL, NULL); | ||
223 | GNUNET_TRANSPORT_peer_get_active_addresses_cancel (pal_ctx); | ||
224 | } | ||
225 | else | ||
226 | { | ||
227 | reconnect (pal_ctx); | ||
228 | } | ||
229 | return; | ||
230 | } | ||
231 | |||
232 | air_msg = (struct AddressIterateResponseMessage *) msg; | ||
233 | tlen = ntohl (air_msg->pluginlen); | ||
234 | alen = ntohl (air_msg->addrlen); | ||
235 | |||
236 | if (size != sizeof (struct AddressIterateResponseMessage) + tlen + alen) | ||
237 | { | ||
238 | GNUNET_break (0); | ||
239 | if (pal_ctx->one_shot) | ||
240 | { | ||
241 | pal_ctx->cb (pal_ctx->cb_cls, NULL, NULL); | ||
242 | GNUNET_TRANSPORT_peer_get_active_addresses_cancel (pal_ctx); | ||
243 | } | ||
244 | else | ||
245 | { | ||
246 | reconnect (pal_ctx); | ||
247 | } | ||
248 | return; | ||
249 | } | ||
250 | |||
251 | if (alen == 0 && tlen == 0) | ||
252 | { | ||
253 | pal_ctx->cb (pal_ctx->cb_cls, &air_msg->peer, NULL); | ||
254 | } | ||
255 | else | ||
256 | { | ||
257 | addr = (const char *) &air_msg[1]; | ||
258 | transport_name = &addr[alen]; | ||
259 | |||
260 | if (transport_name[tlen - 1] != '\0') | ||
261 | { | ||
262 | GNUNET_break (0); | ||
263 | if (pal_ctx->one_shot) | ||
264 | { | ||
265 | pal_ctx->cb (pal_ctx->cb_cls, NULL, NULL); | ||
266 | GNUNET_TRANSPORT_peer_get_active_addresses_cancel (pal_ctx); | ||
267 | } | ||
268 | else | ||
269 | { | ||
270 | reconnect (pal_ctx); | ||
271 | } | ||
272 | return; | ||
273 | } | ||
274 | |||
275 | /* notify client */ | ||
276 | address = | ||
277 | GNUNET_HELLO_address_allocate (&air_msg->peer, transport_name, addr, | ||
278 | alen); | ||
279 | pal_ctx->cb (pal_ctx->cb_cls, &air_msg->peer, address); | ||
280 | GNUNET_HELLO_address_free (address); | ||
281 | } | ||
282 | |||
283 | /* expect more replies */ | ||
284 | GNUNET_CLIENT_receive (pal_ctx->client, &peer_address_response_processor, | ||
285 | pal_ctx, | ||
286 | GNUNET_TIME_absolute_get_remaining (pal_ctx->timeout)); | ||
287 | } | ||
288 | |||
289 | |||
290 | /** | ||
291 | * Return all the known addresses for a specific peer or all peers. | ||
292 | * Returns continuously all address if one_shot is set to GNUNET_NO | ||
293 | * | ||
294 | * CHANGE: Returns the address(es) that we are currently using for this | ||
295 | * peer. Upon completion, the 'AddressLookUpCallback' is called one more | ||
296 | * time with 'NULL' for the address and the peer. After this, the operation must no | ||
297 | * longer be explicitly canceled. | ||
298 | * | ||
299 | * @param cfg configuration to use | ||
300 | * @param peer peer identity to look up the addresses of, CHANGE: allow NULL for all (connected) peers | ||
301 | * @param one_shot GNUNET_YES to return the current state and then end (with NULL+NULL), | ||
302 | * GNUNET_NO to monitor the set of addresses used (continuously, must be explicitly canceled) | ||
303 | * @param timeout how long is the lookup allowed to take at most (irrelevant if one_shot is set to GNUNET_NO) | ||
304 | * @param peer_address_callback function to call with the results | ||
305 | * @param peer_address_callback_cls closure for peer_address_callback | ||
306 | */ | ||
307 | struct GNUNET_TRANSPORT_PeerIterateContext * | ||
308 | GNUNET_TRANSPORT_peer_get_active_addresses (const struct | ||
309 | GNUNET_CONFIGURATION_Handle *cfg, | ||
310 | const struct GNUNET_PeerIdentity | ||
311 | *peer, int one_shot, | ||
312 | struct GNUNET_TIME_Relative timeout, | ||
313 | GNUNET_TRANSPORT_PeerIterateCallback | ||
314 | peer_address_callback, | ||
315 | void *peer_address_callback_cls) | ||
316 | { | ||
317 | struct GNUNET_TRANSPORT_PeerIterateContext *pal_ctx; | ||
318 | struct GNUNET_CLIENT_Connection *client; | ||
319 | |||
320 | client = GNUNET_CLIENT_connect ("transport", cfg); | ||
321 | if (client == NULL) | ||
322 | return NULL; | ||
323 | if (GNUNET_YES != one_shot) | ||
324 | timeout = GNUNET_TIME_UNIT_FOREVER_REL; | ||
325 | pal_ctx = GNUNET_new (struct GNUNET_TRANSPORT_PeerIterateContext); | ||
326 | pal_ctx->cb = peer_address_callback; | ||
327 | pal_ctx->cb_cls = peer_address_callback_cls; | ||
328 | pal_ctx->cfg = cfg; | ||
329 | pal_ctx->timeout = GNUNET_TIME_relative_to_absolute (timeout); | ||
330 | if (NULL != peer) | ||
331 | pal_ctx->peer = *peer; | ||
332 | pal_ctx->one_shot = one_shot; | ||
333 | pal_ctx->client = client; | ||
334 | send_request (pal_ctx); | ||
335 | |||
336 | return pal_ctx; | ||
337 | } | ||
338 | |||
339 | |||
340 | /** | ||
341 | * Cancel request for address conversion. | ||
342 | * | ||
343 | * @param alc handle for the request to cancel | ||
344 | */ | ||
345 | void | ||
346 | GNUNET_TRANSPORT_peer_get_active_addresses_cancel (struct | ||
347 | GNUNET_TRANSPORT_PeerIterateContext | ||
348 | *alc) | ||
349 | { | ||
350 | if (NULL != alc->client) | ||
351 | { | ||
352 | GNUNET_CLIENT_disconnect (alc->client); | ||
353 | alc->client = NULL; | ||
354 | } | ||
355 | if (GNUNET_SCHEDULER_NO_TASK != alc->reconnect_task) | ||
356 | { | ||
357 | GNUNET_SCHEDULER_cancel (alc->reconnect_task); | ||
358 | alc->reconnect_task = GNUNET_SCHEDULER_NO_TASK; | ||
359 | } | ||
360 | GNUNET_free (alc); | ||
361 | } | ||
362 | |||
363 | |||
364 | /* end of transport_api_peer_address_lookup.c */ | ||