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Diffstat (limited to 'src/util/server.c')
-rw-r--r-- | src/util/server.c | 1752 |
1 files changed, 0 insertions, 1752 deletions
diff --git a/src/util/server.c b/src/util/server.c deleted file mode 100644 index 83c30e328..000000000 --- a/src/util/server.c +++ /dev/null | |||
@@ -1,1752 +0,0 @@ | |||
1 | /* | ||
2 | This file is part of GNUnet. | ||
3 | Copyright (C) 2009-2013 GNUnet e.V. | ||
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., 51 Franklin Street, Fifth Floor, | ||
18 | Boston, MA 02110-1301, USA. | ||
19 | */ | ||
20 | |||
21 | /** | ||
22 | * @file util/server.c | ||
23 | * @brief library for building GNUnet network servers | ||
24 | * @author Christian Grothoff | ||
25 | */ | ||
26 | |||
27 | #include "platform.h" | ||
28 | #include "gnunet_util_lib.h" | ||
29 | #include "gnunet_protocols.h" | ||
30 | |||
31 | #define LOG(kind,...) GNUNET_log_from (kind, "util-server", __VA_ARGS__) | ||
32 | |||
33 | #define LOG_STRERROR(kind,syscall) GNUNET_log_from_strerror (kind, "util-server", syscall) | ||
34 | |||
35 | #define LOG_STRERROR_FILE(kind,syscall,filename) GNUNET_log_from_strerror_file (kind, "util-server", syscall, filename) | ||
36 | |||
37 | |||
38 | /** | ||
39 | * List of arrays of message handlers. | ||
40 | */ | ||
41 | struct HandlerList | ||
42 | { | ||
43 | /** | ||
44 | * This is a linked list. | ||
45 | */ | ||
46 | struct HandlerList *next; | ||
47 | |||
48 | /** | ||
49 | * NULL-terminated array of handlers. | ||
50 | */ | ||
51 | const struct GNUNET_SERVER_MessageHandler *handlers; | ||
52 | }; | ||
53 | |||
54 | |||
55 | /** | ||
56 | * List of arrays of message handlers. | ||
57 | */ | ||
58 | struct NotifyList | ||
59 | { | ||
60 | /** | ||
61 | * This is a doubly linked list. | ||
62 | */ | ||
63 | struct NotifyList *next; | ||
64 | |||
65 | /** | ||
66 | * This is a doubly linked list. | ||
67 | */ | ||
68 | struct NotifyList *prev; | ||
69 | |||
70 | /** | ||
71 | * Function to call. | ||
72 | */ | ||
73 | GNUNET_SERVER_DisconnectCallback callback; | ||
74 | |||
75 | /** | ||
76 | * Closure for callback. | ||
77 | */ | ||
78 | void *callback_cls; | ||
79 | }; | ||
80 | |||
81 | |||
82 | /** | ||
83 | * @brief handle for a server | ||
84 | */ | ||
85 | struct GNUNET_SERVER_Handle | ||
86 | { | ||
87 | /** | ||
88 | * List of handlers for incoming messages. | ||
89 | */ | ||
90 | struct HandlerList *handlers; | ||
91 | |||
92 | /** | ||
93 | * Head of list of our current clients. | ||
94 | */ | ||
95 | struct GNUNET_SERVER_Client *clients_head; | ||
96 | |||
97 | /** | ||
98 | * Head of list of our current clients. | ||
99 | */ | ||
100 | struct GNUNET_SERVER_Client *clients_tail; | ||
101 | |||
102 | /** | ||
103 | * Head of linked list of functions to call on disconnects by clients. | ||
104 | */ | ||
105 | struct NotifyList *disconnect_notify_list_head; | ||
106 | |||
107 | /** | ||
108 | * Tail of linked list of functions to call on disconnects by clients. | ||
109 | */ | ||
110 | struct NotifyList *disconnect_notify_list_tail; | ||
111 | |||
112 | /** | ||
113 | * Head of linked list of functions to call on connects by clients. | ||
114 | */ | ||
115 | struct NotifyList *connect_notify_list_head; | ||
116 | |||
117 | /** | ||
118 | * Tail of linked list of functions to call on connects by clients. | ||
119 | */ | ||
120 | struct NotifyList *connect_notify_list_tail; | ||
121 | |||
122 | /** | ||
123 | * Function to call for access control. | ||
124 | */ | ||
125 | GNUNET_CONNECTION_AccessCheck access_cb; | ||
126 | |||
127 | /** | ||
128 | * Closure for @e access_cb. | ||
129 | */ | ||
130 | void *access_cb_cls; | ||
131 | |||
132 | /** | ||
133 | * NULL-terminated array of sockets used to listen for new | ||
134 | * connections. | ||
135 | */ | ||
136 | struct GNUNET_NETWORK_Handle **listen_sockets; | ||
137 | |||
138 | /** | ||
139 | * After how long should an idle connection time | ||
140 | * out (on write). | ||
141 | */ | ||
142 | struct GNUNET_TIME_Relative idle_timeout; | ||
143 | |||
144 | /** | ||
145 | * Task scheduled to do the listening. | ||
146 | */ | ||
147 | struct GNUNET_SCHEDULER_Task * listen_task; | ||
148 | |||
149 | /** | ||
150 | * Alternative function to create a MST instance. | ||
151 | */ | ||
152 | GNUNET_SERVER_MstCreateCallback mst_create; | ||
153 | |||
154 | /** | ||
155 | * Alternative function to destroy a MST instance. | ||
156 | */ | ||
157 | GNUNET_SERVER_MstDestroyCallback mst_destroy; | ||
158 | |||
159 | /** | ||
160 | * Alternative function to give data to a MST instance. | ||
161 | */ | ||
162 | GNUNET_SERVER_MstReceiveCallback mst_receive; | ||
163 | |||
164 | /** | ||
165 | * Closure for 'mst_'-callbacks. | ||
166 | */ | ||
167 | void *mst_cls; | ||
168 | |||
169 | /** | ||
170 | * Do we ignore messages of types that we do not understand or do we | ||
171 | * require that a handler is found (and if not kill the connection)? | ||
172 | */ | ||
173 | int require_found; | ||
174 | |||
175 | /** | ||
176 | * Set to #GNUNET_YES once we are in 'soft' shutdown where we wait for | ||
177 | * all non-monitor clients to disconnect before we call | ||
178 | * #GNUNET_SERVER_destroy. See test_monitor_clients(). Set to | ||
179 | * #GNUNET_SYSERR once the final destroy task has been scheduled | ||
180 | * (we cannot run it in the same task). | ||
181 | */ | ||
182 | int in_soft_shutdown; | ||
183 | }; | ||
184 | |||
185 | |||
186 | /** | ||
187 | * Handle server returns for aborting transmission to a client. | ||
188 | */ | ||
189 | struct GNUNET_SERVER_TransmitHandle | ||
190 | { | ||
191 | /** | ||
192 | * Function to call to get the message. | ||
193 | */ | ||
194 | GNUNET_CONNECTION_TransmitReadyNotify callback; | ||
195 | |||
196 | /** | ||
197 | * Closure for @e callback | ||
198 | */ | ||
199 | void *callback_cls; | ||
200 | |||
201 | /** | ||
202 | * Active connection transmission handle. | ||
203 | */ | ||
204 | struct GNUNET_CONNECTION_TransmitHandle *cth; | ||
205 | |||
206 | }; | ||
207 | |||
208 | |||
209 | /** | ||
210 | * @brief handle for a client of the server | ||
211 | */ | ||
212 | struct GNUNET_SERVER_Client | ||
213 | { | ||
214 | |||
215 | /** | ||
216 | * This is a doubly linked list. | ||
217 | */ | ||
218 | struct GNUNET_SERVER_Client *next; | ||
219 | |||
220 | /** | ||
221 | * This is a doubly linked list. | ||
222 | */ | ||
223 | struct GNUNET_SERVER_Client *prev; | ||
224 | |||
225 | /** | ||
226 | * Processing of incoming data. | ||
227 | */ | ||
228 | void *mst; | ||
229 | |||
230 | /** | ||
231 | * Server that this client belongs to. | ||
232 | */ | ||
233 | struct GNUNET_SERVER_Handle *server; | ||
234 | |||
235 | /** | ||
236 | * Client closure for callbacks. | ||
237 | */ | ||
238 | struct GNUNET_CONNECTION_Handle *connection; | ||
239 | |||
240 | /** | ||
241 | * User context value, manipulated using | ||
242 | * 'GNUNET_SERVER_client_{get/set}_user_context' functions. | ||
243 | */ | ||
244 | void *user_context; | ||
245 | |||
246 | /** | ||
247 | * ID of task used to restart processing. | ||
248 | */ | ||
249 | struct GNUNET_SCHEDULER_Task * restart_task; | ||
250 | |||
251 | /** | ||
252 | * Task that warns about missing calls to #GNUNET_SERVER_receive_done. | ||
253 | */ | ||
254 | struct GNUNET_SCHEDULER_Task * warn_task; | ||
255 | |||
256 | /** | ||
257 | * Time when the warn task was started. | ||
258 | */ | ||
259 | struct GNUNET_TIME_Absolute warn_start; | ||
260 | |||
261 | /** | ||
262 | * Last activity on this socket (used to time it out | ||
263 | * if reference_count == 0). | ||
264 | */ | ||
265 | struct GNUNET_TIME_Absolute last_activity; | ||
266 | |||
267 | /** | ||
268 | * Transmission handle we return for this client from | ||
269 | * #GNUNET_SERVER_notify_transmit_ready. | ||
270 | */ | ||
271 | struct GNUNET_SERVER_TransmitHandle th; | ||
272 | |||
273 | /** | ||
274 | * After how long should an idle connection time | ||
275 | * out (on write). | ||
276 | */ | ||
277 | struct GNUNET_TIME_Relative idle_timeout; | ||
278 | |||
279 | /** | ||
280 | * Number of external entities with a reference to | ||
281 | * this client object. | ||
282 | */ | ||
283 | unsigned int reference_count; | ||
284 | |||
285 | /** | ||
286 | * Was processing if incoming messages suspended while | ||
287 | * we were still processing data already received? | ||
288 | * This is a counter saying how often processing was | ||
289 | * suspended (once per handler invoked). | ||
290 | */ | ||
291 | unsigned int suspended; | ||
292 | |||
293 | /** | ||
294 | * Last size given when user context was initialized; used for | ||
295 | * sanity check. | ||
296 | */ | ||
297 | size_t user_context_size; | ||
298 | |||
299 | /** | ||
300 | * Are we currently in the "process_client_buffer" function (and | ||
301 | * will hence restart the receive job on exit if suspended == 0 once | ||
302 | * we are done?). If this is set, then "receive_done" will | ||
303 | * essentially only decrement suspended; if this is not set, then | ||
304 | * "receive_done" may need to restart the receive process (either | ||
305 | * from the side-buffer or via select/recv). | ||
306 | */ | ||
307 | int in_process_client_buffer; | ||
308 | |||
309 | /** | ||
310 | * We're about to close down this client. | ||
311 | */ | ||
312 | int shutdown_now; | ||
313 | |||
314 | /** | ||
315 | * Are we currently trying to receive? (#GNUNET_YES if we are, | ||
316 | * #GNUNET_NO if we are not, #GNUNET_SYSERR if data is already | ||
317 | * available in MST). | ||
318 | */ | ||
319 | int receive_pending; | ||
320 | |||
321 | /** | ||
322 | * Persist the file handle for this client no matter what happens, | ||
323 | * force the OS to close once the process actually dies. Should only | ||
324 | * be used in special cases! | ||
325 | */ | ||
326 | int persist; | ||
327 | |||
328 | /** | ||
329 | * Is this client a 'monitor' client that should not be counted | ||
330 | * when deciding on destroying the server during soft shutdown? | ||
331 | * (see also #GNUNET_SERVICE_start) | ||
332 | */ | ||
333 | int is_monitor; | ||
334 | |||
335 | /** | ||
336 | * Type of last message processed (for warn_no_receive_done). | ||
337 | */ | ||
338 | uint16_t warn_type; | ||
339 | }; | ||
340 | |||
341 | |||
342 | |||
343 | /** | ||
344 | * Return user context associated with the given client. | ||
345 | * Note: you should probably use the macro (call without the underscore). | ||
346 | * | ||
347 | * @param client client to query | ||
348 | * @param size number of bytes in user context struct (for verification only) | ||
349 | * @return pointer to user context | ||
350 | */ | ||
351 | void * | ||
352 | GNUNET_SERVER_client_get_user_context_ (struct GNUNET_SERVER_Client *client, | ||
353 | size_t size) | ||
354 | { | ||
355 | if ((0 == client->user_context_size) && | ||
356 | (NULL == client->user_context)) | ||
357 | return NULL; /* never set */ | ||
358 | GNUNET_assert (size == client->user_context_size); | ||
359 | return client->user_context; | ||
360 | } | ||
361 | |||
362 | |||
363 | /** | ||
364 | * Set user context to be associated with the given client. | ||
365 | * Note: you should probably use the macro (call without the underscore). | ||
366 | * | ||
367 | * @param client client to query | ||
368 | * @param ptr pointer to user context | ||
369 | * @param size number of bytes in user context struct (for verification only) | ||
370 | */ | ||
371 | void | ||
372 | GNUNET_SERVER_client_set_user_context_ (struct GNUNET_SERVER_Client *client, | ||
373 | void *ptr, | ||
374 | size_t size) | ||
375 | { | ||
376 | if (NULL == ptr) | ||
377 | { | ||
378 | client->user_context_size = 0; | ||
379 | client->user_context = ptr; | ||
380 | return; | ||
381 | } | ||
382 | client->user_context_size = size; | ||
383 | client->user_context = ptr; | ||
384 | } | ||
385 | |||
386 | |||
387 | /** | ||
388 | * Scheduler says our listen socket is ready. Process it! | ||
389 | * | ||
390 | * @param cls handle to our server for which we are processing the listen | ||
391 | * socket | ||
392 | */ | ||
393 | static void | ||
394 | process_listen_socket (void *cls) | ||
395 | { | ||
396 | struct GNUNET_SERVER_Handle *server = cls; | ||
397 | const struct GNUNET_SCHEDULER_TaskContext *tc; | ||
398 | struct GNUNET_CONNECTION_Handle *sock; | ||
399 | unsigned int i; | ||
400 | |||
401 | server->listen_task = NULL; | ||
402 | tc = GNUNET_SCHEDULER_get_task_context (); | ||
403 | for (i = 0; NULL != server->listen_sockets[i]; i++) | ||
404 | { | ||
405 | if (GNUNET_NETWORK_fdset_isset (tc->read_ready, | ||
406 | server->listen_sockets[i])) | ||
407 | { | ||
408 | sock = | ||
409 | GNUNET_CONNECTION_create_from_accept (server->access_cb, | ||
410 | server->access_cb_cls, | ||
411 | server->listen_sockets[i]); | ||
412 | if (NULL != sock) | ||
413 | { | ||
414 | LOG (GNUNET_ERROR_TYPE_DEBUG, | ||
415 | "Server accepted incoming connection.\n"); | ||
416 | (void) GNUNET_SERVER_connect_socket (server, | ||
417 | sock); | ||
418 | } | ||
419 | } | ||
420 | } | ||
421 | /* listen for more! */ | ||
422 | GNUNET_SERVER_resume (server); | ||
423 | } | ||
424 | |||
425 | |||
426 | /** | ||
427 | * Create and initialize a listen socket for the server. | ||
428 | * | ||
429 | * @param server_addr address to listen on | ||
430 | * @param socklen length of @a server_addr | ||
431 | * @return NULL on error, otherwise the listen socket | ||
432 | */ | ||
433 | static struct GNUNET_NETWORK_Handle * | ||
434 | open_listen_socket (const struct sockaddr *server_addr, | ||
435 | socklen_t socklen) | ||
436 | { | ||
437 | struct GNUNET_NETWORK_Handle *sock; | ||
438 | uint16_t port; | ||
439 | int eno; | ||
440 | |||
441 | switch (server_addr->sa_family) | ||
442 | { | ||
443 | case AF_INET: | ||
444 | port = ntohs (((const struct sockaddr_in *) server_addr)->sin_port); | ||
445 | break; | ||
446 | case AF_INET6: | ||
447 | port = ntohs (((const struct sockaddr_in6 *) server_addr)->sin6_port); | ||
448 | break; | ||
449 | case AF_UNIX: | ||
450 | port = 0; | ||
451 | break; | ||
452 | default: | ||
453 | GNUNET_break (0); | ||
454 | port = 0; | ||
455 | break; | ||
456 | } | ||
457 | sock = GNUNET_NETWORK_socket_create (server_addr->sa_family, SOCK_STREAM, 0); | ||
458 | if (NULL == sock) | ||
459 | { | ||
460 | LOG_STRERROR (GNUNET_ERROR_TYPE_ERROR, "socket"); | ||
461 | errno = 0; | ||
462 | return NULL; | ||
463 | } | ||
464 | /* bind the socket */ | ||
465 | if (GNUNET_OK != GNUNET_NETWORK_socket_bind (sock, server_addr, socklen)) | ||
466 | { | ||
467 | eno = errno; | ||
468 | if (EADDRINUSE != errno) | ||
469 | { | ||
470 | /* we don't log 'EADDRINUSE' here since an IPv4 bind may | ||
471 | * fail if we already took the port on IPv6; if both IPv4 and | ||
472 | * IPv6 binds fail, then our caller will log using the | ||
473 | * errno preserved in 'eno' */ | ||
474 | LOG_STRERROR (GNUNET_ERROR_TYPE_ERROR, | ||
475 | "bind"); | ||
476 | if (0 != port) | ||
477 | LOG (GNUNET_ERROR_TYPE_ERROR, | ||
478 | _("`%s' failed for port %d (%s).\n"), | ||
479 | "bind", | ||
480 | port, | ||
481 | (AF_INET == server_addr->sa_family) ? "IPv4" : "IPv6"); | ||
482 | eno = 0; | ||
483 | } | ||
484 | else | ||
485 | { | ||
486 | if (0 != port) | ||
487 | LOG (GNUNET_ERROR_TYPE_WARNING, | ||
488 | _("`%s' failed for port %d (%s): address already in use\n"), | ||
489 | "bind", port, | ||
490 | (AF_INET == server_addr->sa_family) ? "IPv4" : "IPv6"); | ||
491 | else if (AF_UNIX == server_addr->sa_family) | ||
492 | { | ||
493 | LOG (GNUNET_ERROR_TYPE_WARNING, | ||
494 | _("`%s' failed for `%s': address already in use\n"), | ||
495 | "bind", | ||
496 | GNUNET_a2s (server_addr, socklen)); | ||
497 | } | ||
498 | } | ||
499 | GNUNET_break (GNUNET_OK == GNUNET_NETWORK_socket_close (sock)); | ||
500 | errno = eno; | ||
501 | return NULL; | ||
502 | } | ||
503 | if (GNUNET_OK != GNUNET_NETWORK_socket_listen (sock, 5)) | ||
504 | { | ||
505 | LOG_STRERROR (GNUNET_ERROR_TYPE_ERROR, | ||
506 | "listen"); | ||
507 | GNUNET_break (GNUNET_OK == GNUNET_NETWORK_socket_close (sock)); | ||
508 | errno = 0; | ||
509 | return NULL; | ||
510 | } | ||
511 | if (0 != port) | ||
512 | LOG (GNUNET_ERROR_TYPE_DEBUG, | ||
513 | "Server starts to listen on port %u.\n", | ||
514 | port); | ||
515 | return sock; | ||
516 | } | ||
517 | |||
518 | |||
519 | /** | ||
520 | * Create a new server. | ||
521 | * | ||
522 | * @param access_cb function for access control | ||
523 | * @param access_cb_cls closure for @a access_cb | ||
524 | * @param lsocks NULL-terminated array of listen sockets | ||
525 | * @param idle_timeout after how long should we timeout idle connections? | ||
526 | * @param require_found if #GNUNET_YES, connections sending messages of unknown type | ||
527 | * will be closed | ||
528 | * @return handle for the new server, NULL on error | ||
529 | * (typically, "port" already in use) | ||
530 | */ | ||
531 | struct GNUNET_SERVER_Handle * | ||
532 | GNUNET_SERVER_create_with_sockets (GNUNET_CONNECTION_AccessCheck access_cb, | ||
533 | void *access_cb_cls, | ||
534 | struct GNUNET_NETWORK_Handle **lsocks, | ||
535 | struct GNUNET_TIME_Relative idle_timeout, | ||
536 | int require_found) | ||
537 | { | ||
538 | struct GNUNET_SERVER_Handle *server; | ||
539 | |||
540 | server = GNUNET_new (struct GNUNET_SERVER_Handle); | ||
541 | server->idle_timeout = idle_timeout; | ||
542 | server->listen_sockets = lsocks; | ||
543 | server->access_cb = access_cb; | ||
544 | server->access_cb_cls = access_cb_cls; | ||
545 | server->require_found = require_found; | ||
546 | if (NULL != lsocks) | ||
547 | GNUNET_SERVER_resume (server); | ||
548 | return server; | ||
549 | } | ||
550 | |||
551 | |||
552 | /** | ||
553 | * Create a new server. | ||
554 | * | ||
555 | * @param access_cb function for access control | ||
556 | * @param access_cb_cls closure for @a access_cb | ||
557 | * @param server_addr address to listen on (including port), NULL terminated array | ||
558 | * @param socklen length of server_addr | ||
559 | * @param idle_timeout after how long should we timeout idle connections? | ||
560 | * @param require_found if YES, connections sending messages of unknown type | ||
561 | * will be closed | ||
562 | * @return handle for the new server, NULL on error | ||
563 | * (typically, "port" already in use) | ||
564 | */ | ||
565 | struct GNUNET_SERVER_Handle * | ||
566 | GNUNET_SERVER_create (GNUNET_CONNECTION_AccessCheck access_cb, | ||
567 | void *access_cb_cls, | ||
568 | struct sockaddr *const *server_addr, | ||
569 | const socklen_t * socklen, | ||
570 | struct GNUNET_TIME_Relative idle_timeout, | ||
571 | int require_found) | ||
572 | { | ||
573 | struct GNUNET_NETWORK_Handle **lsocks; | ||
574 | unsigned int i; | ||
575 | unsigned int j; | ||
576 | unsigned int k; | ||
577 | int seen; | ||
578 | |||
579 | i = 0; | ||
580 | while (NULL != server_addr[i]) | ||
581 | i++; | ||
582 | if (i > 0) | ||
583 | { | ||
584 | lsocks = GNUNET_malloc (sizeof (struct GNUNET_NETWORK_Handle *) * (i + 1)); | ||
585 | i = 0; | ||
586 | j = 0; | ||
587 | while (NULL != server_addr[i]) | ||
588 | { | ||
589 | seen = 0; | ||
590 | for (k=0;k<i;k++) | ||
591 | if ( (socklen[k] == socklen[i]) && | ||
592 | (0 == memcmp (server_addr[k], server_addr[i], socklen[i])) ) | ||
593 | { | ||
594 | seen = 1; | ||
595 | break; | ||
596 | } | ||
597 | if (0 != seen) | ||
598 | { | ||
599 | /* duplicate address, skip */ | ||
600 | i++; | ||
601 | continue; | ||
602 | } | ||
603 | lsocks[j] = open_listen_socket (server_addr[i], socklen[i]); | ||
604 | if (NULL != lsocks[j]) | ||
605 | j++; | ||
606 | i++; | ||
607 | } | ||
608 | if (0 == j) | ||
609 | { | ||
610 | if (0 != errno) | ||
611 | LOG_STRERROR (GNUNET_ERROR_TYPE_ERROR, "bind"); | ||
612 | GNUNET_free (lsocks); | ||
613 | lsocks = NULL; | ||
614 | } | ||
615 | } | ||
616 | else | ||
617 | { | ||
618 | lsocks = NULL; | ||
619 | } | ||
620 | return GNUNET_SERVER_create_with_sockets (access_cb, | ||
621 | access_cb_cls, | ||
622 | lsocks, | ||
623 | idle_timeout, | ||
624 | require_found); | ||
625 | } | ||
626 | |||
627 | |||
628 | /** | ||
629 | * Set the 'monitor' flag on this client. Clients which have been | ||
630 | * marked as 'monitors' won't prevent the server from shutting down | ||
631 | * once '#GNUNET_SERVER_stop_listening()' has been invoked. The idea is | ||
632 | * that for "normal" clients we likely want to allow them to process | ||
633 | * their requests; however, monitor-clients are likely to 'never' | ||
634 | * disconnect during shutdown and thus will not be considered when | ||
635 | * determining if the server should continue to exist after | ||
636 | * #GNUNET_SERVER_destroy() has been called. | ||
637 | * | ||
638 | * @param client the client to set the 'monitor' flag on | ||
639 | */ | ||
640 | void | ||
641 | GNUNET_SERVER_client_mark_monitor (struct GNUNET_SERVER_Client *client) | ||
642 | { | ||
643 | GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, | ||
644 | "Marking client as monitor!\n"); | ||
645 | client->is_monitor = GNUNET_YES; | ||
646 | } | ||
647 | |||
648 | |||
649 | /** | ||
650 | * Helper function for #test_monitor_clients() to trigger | ||
651 | * #GNUNET_SERVER_destroy() after the stack has unwound. | ||
652 | * | ||
653 | * @param cls the `struct GNUNET_SERVER_Handle *` to destroy | ||
654 | */ | ||
655 | static void | ||
656 | do_destroy (void *cls) | ||
657 | { | ||
658 | struct GNUNET_SERVER_Handle *server = cls; | ||
659 | |||
660 | GNUNET_SERVER_destroy (server); | ||
661 | } | ||
662 | |||
663 | |||
664 | /** | ||
665 | * Check if only 'monitor' clients are left. If so, destroy the | ||
666 | * server completely. | ||
667 | * | ||
668 | * @param server server to test for full shutdown | ||
669 | */ | ||
670 | static void | ||
671 | test_monitor_clients (struct GNUNET_SERVER_Handle *server) | ||
672 | { | ||
673 | struct GNUNET_SERVER_Client *client; | ||
674 | |||
675 | if (GNUNET_YES != server->in_soft_shutdown) | ||
676 | return; | ||
677 | for (client = server->clients_head; NULL != client; client = client->next) | ||
678 | if (GNUNET_NO == client->is_monitor) | ||
679 | return; /* not done yet */ | ||
680 | server->in_soft_shutdown = GNUNET_SYSERR; | ||
681 | (void) GNUNET_SCHEDULER_add_now (&do_destroy, server); | ||
682 | } | ||
683 | |||
684 | |||
685 | /** | ||
686 | * Suspend accepting connections from the listen socket temporarily. | ||
687 | * | ||
688 | * @param server server to stop accepting connections. | ||
689 | */ | ||
690 | void | ||
691 | GNUNET_SERVER_suspend (struct GNUNET_SERVER_Handle *server) | ||
692 | { | ||
693 | if (NULL != server->listen_task) | ||
694 | { | ||
695 | GNUNET_SCHEDULER_cancel (server->listen_task); | ||
696 | server->listen_task = NULL; | ||
697 | } | ||
698 | } | ||
699 | |||
700 | |||
701 | /** | ||
702 | * Resume accepting connections from the listen socket. | ||
703 | * | ||
704 | * @param server server to stop accepting connections. | ||
705 | */ | ||
706 | void | ||
707 | GNUNET_SERVER_resume (struct GNUNET_SERVER_Handle *server) | ||
708 | { | ||
709 | struct GNUNET_NETWORK_FDSet *r; | ||
710 | unsigned int i; | ||
711 | |||
712 | if (NULL == server->listen_sockets) | ||
713 | return; | ||
714 | if (NULL == server->listen_sockets[0]) | ||
715 | return; /* nothing to do, no listen sockets! */ | ||
716 | if (NULL == server->listen_sockets[1]) | ||
717 | { | ||
718 | /* simplified method: no fd set needed; this is then much simpler | ||
719 | and much more efficient */ | ||
720 | server->listen_task = | ||
721 | GNUNET_SCHEDULER_add_read_net_with_priority (GNUNET_TIME_UNIT_FOREVER_REL, | ||
722 | GNUNET_SCHEDULER_PRIORITY_HIGH, | ||
723 | server->listen_sockets[0], | ||
724 | &process_listen_socket, server); | ||
725 | return; | ||
726 | } | ||
727 | r = GNUNET_NETWORK_fdset_create (); | ||
728 | i = 0; | ||
729 | while (NULL != server->listen_sockets[i]) | ||
730 | GNUNET_NETWORK_fdset_set (r, server->listen_sockets[i++]); | ||
731 | server->listen_task = | ||
732 | GNUNET_SCHEDULER_add_select (GNUNET_SCHEDULER_PRIORITY_HIGH, | ||
733 | GNUNET_TIME_UNIT_FOREVER_REL, r, NULL, | ||
734 | &process_listen_socket, server); | ||
735 | GNUNET_NETWORK_fdset_destroy (r); | ||
736 | } | ||
737 | |||
738 | |||
739 | /** | ||
740 | * Stop the listen socket and get ready to shutdown the server | ||
741 | * once only 'monitor' clients are left. | ||
742 | * | ||
743 | * @param server server to stop listening on | ||
744 | */ | ||
745 | void | ||
746 | GNUNET_SERVER_stop_listening (struct GNUNET_SERVER_Handle *server) | ||
747 | { | ||
748 | unsigned int i; | ||
749 | |||
750 | LOG (GNUNET_ERROR_TYPE_DEBUG, | ||
751 | "Server in soft shutdown\n"); | ||
752 | if (NULL != server->listen_task) | ||
753 | { | ||
754 | GNUNET_SCHEDULER_cancel (server->listen_task); | ||
755 | server->listen_task = NULL; | ||
756 | } | ||
757 | if (NULL != server->listen_sockets) | ||
758 | { | ||
759 | i = 0; | ||
760 | while (NULL != server->listen_sockets[i]) | ||
761 | GNUNET_break (GNUNET_OK == | ||
762 | GNUNET_NETWORK_socket_close (server->listen_sockets[i++])); | ||
763 | GNUNET_free (server->listen_sockets); | ||
764 | server->listen_sockets = NULL; | ||
765 | } | ||
766 | if (GNUNET_NO == server->in_soft_shutdown) | ||
767 | server->in_soft_shutdown = GNUNET_YES; | ||
768 | test_monitor_clients (server); | ||
769 | } | ||
770 | |||
771 | |||
772 | /** | ||
773 | * Free resources held by this server. | ||
774 | * | ||
775 | * @param server server to destroy | ||
776 | */ | ||
777 | void | ||
778 | GNUNET_SERVER_destroy (struct GNUNET_SERVER_Handle *server) | ||
779 | { | ||
780 | struct HandlerList *hpos; | ||
781 | struct NotifyList *npos; | ||
782 | unsigned int i; | ||
783 | |||
784 | LOG (GNUNET_ERROR_TYPE_DEBUG, | ||
785 | "Server shutting down.\n"); | ||
786 | if (NULL != server->listen_task) | ||
787 | { | ||
788 | GNUNET_SCHEDULER_cancel (server->listen_task); | ||
789 | server->listen_task = NULL; | ||
790 | } | ||
791 | if (NULL != server->listen_sockets) | ||
792 | { | ||
793 | i = 0; | ||
794 | while (NULL != server->listen_sockets[i]) | ||
795 | GNUNET_break (GNUNET_OK == | ||
796 | GNUNET_NETWORK_socket_close (server->listen_sockets[i++])); | ||
797 | GNUNET_free (server->listen_sockets); | ||
798 | server->listen_sockets = NULL; | ||
799 | } | ||
800 | while (NULL != server->clients_head) | ||
801 | GNUNET_SERVER_client_disconnect (server->clients_head); | ||
802 | while (NULL != (hpos = server->handlers)) | ||
803 | { | ||
804 | server->handlers = hpos->next; | ||
805 | GNUNET_free (hpos); | ||
806 | } | ||
807 | while (NULL != (npos = server->disconnect_notify_list_head)) | ||
808 | { | ||
809 | npos->callback (npos->callback_cls, | ||
810 | NULL); | ||
811 | GNUNET_CONTAINER_DLL_remove (server->disconnect_notify_list_head, | ||
812 | server->disconnect_notify_list_tail, | ||
813 | npos); | ||
814 | GNUNET_free (npos); | ||
815 | } | ||
816 | while (NULL != (npos = server->connect_notify_list_head)) | ||
817 | { | ||
818 | npos->callback (npos->callback_cls, | ||
819 | NULL); | ||
820 | GNUNET_CONTAINER_DLL_remove (server->connect_notify_list_head, | ||
821 | server->connect_notify_list_tail, | ||
822 | npos); | ||
823 | GNUNET_free (npos); | ||
824 | } | ||
825 | GNUNET_free (server); | ||
826 | } | ||
827 | |||
828 | |||
829 | /** | ||
830 | * Add additional handlers to an existing server. | ||
831 | * | ||
832 | * @param server the server to add handlers to | ||
833 | * @param handlers array of message handlers for | ||
834 | * incoming messages; the last entry must | ||
835 | * have "NULL" for the "callback"; multiple | ||
836 | * entries for the same type are allowed, | ||
837 | * they will be called in order of occurence. | ||
838 | * These handlers can be removed later; | ||
839 | * the handlers array must exist until removed | ||
840 | * (or server is destroyed). | ||
841 | */ | ||
842 | void | ||
843 | GNUNET_SERVER_add_handlers (struct GNUNET_SERVER_Handle *server, | ||
844 | const struct GNUNET_SERVER_MessageHandler *handlers) | ||
845 | { | ||
846 | struct HandlerList *p; | ||
847 | |||
848 | p = GNUNET_new (struct HandlerList); | ||
849 | p->handlers = handlers; | ||
850 | p->next = server->handlers; | ||
851 | server->handlers = p; | ||
852 | } | ||
853 | |||
854 | |||
855 | /** | ||
856 | * Change functions used by the server to tokenize the message stream. | ||
857 | * (very rarely used). | ||
858 | * | ||
859 | * @param server server to modify | ||
860 | * @param create new tokenizer initialization function | ||
861 | * @param destroy new tokenizer destruction function | ||
862 | * @param receive new tokenizer receive function | ||
863 | * @param cls closure for @a create, @a receive, @a destroy | ||
864 | */ | ||
865 | void | ||
866 | GNUNET_SERVER_set_callbacks (struct GNUNET_SERVER_Handle *server, | ||
867 | GNUNET_SERVER_MstCreateCallback create, | ||
868 | GNUNET_SERVER_MstDestroyCallback destroy, | ||
869 | GNUNET_SERVER_MstReceiveCallback receive, | ||
870 | void *cls) | ||
871 | { | ||
872 | server->mst_create = create; | ||
873 | server->mst_destroy = destroy; | ||
874 | server->mst_receive = receive; | ||
875 | server->mst_cls = cls; | ||
876 | } | ||
877 | |||
878 | |||
879 | /** | ||
880 | * Task run to warn about missing calls to #GNUNET_SERVER_receive_done. | ||
881 | * | ||
882 | * @param cls our `struct GNUNET_SERVER_Client *` to process more requests from | ||
883 | */ | ||
884 | static void | ||
885 | warn_no_receive_done (void *cls) | ||
886 | { | ||
887 | struct GNUNET_SERVER_Client *client = cls; | ||
888 | |||
889 | GNUNET_break (0 != client->warn_type); /* type should never be 0 here, as we don't use 0 */ | ||
890 | client->warn_task = | ||
891 | GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_MINUTES, | ||
892 | &warn_no_receive_done, client); | ||
893 | LOG (GNUNET_ERROR_TYPE_WARNING, | ||
894 | _("Processing code for message of type %u did not call `GNUNET_SERVER_receive_done' after %s\n"), | ||
895 | (unsigned int) client->warn_type, | ||
896 | GNUNET_STRINGS_relative_time_to_string (GNUNET_TIME_absolute_get_duration (client->warn_start), | ||
897 | GNUNET_YES)); | ||
898 | } | ||
899 | |||
900 | |||
901 | /** | ||
902 | * Disable the warning the server issues if a message is not acknowledged | ||
903 | * in a timely fashion. Use this call if a client is intentionally delayed | ||
904 | * for a while. Only applies to the current message. | ||
905 | * | ||
906 | * @param client client for which to disable the warning | ||
907 | */ | ||
908 | void | ||
909 | GNUNET_SERVER_disable_receive_done_warning (struct GNUNET_SERVER_Client *client) | ||
910 | { | ||
911 | if (NULL != client->warn_task) | ||
912 | { | ||
913 | GNUNET_SCHEDULER_cancel (client->warn_task); | ||
914 | client->warn_task = NULL; | ||
915 | } | ||
916 | } | ||
917 | |||
918 | |||
919 | /** | ||
920 | * Inject a message into the server, pretend it came | ||
921 | * from the specified client. Delivery of the message | ||
922 | * will happen instantly (if a handler is installed; | ||
923 | * otherwise the call does nothing). | ||
924 | * | ||
925 | * @param server the server receiving the message | ||
926 | * @param sender the "pretended" sender of the message | ||
927 | * can be NULL! | ||
928 | * @param message message to transmit | ||
929 | * @return #GNUNET_OK if the message was OK and the | ||
930 | * connection can stay open | ||
931 | * #GNUNET_SYSERR if the connection to the | ||
932 | * client should be shut down | ||
933 | */ | ||
934 | int | ||
935 | GNUNET_SERVER_inject (struct GNUNET_SERVER_Handle *server, | ||
936 | struct GNUNET_SERVER_Client *sender, | ||
937 | const struct GNUNET_MessageHeader *message) | ||
938 | { | ||
939 | struct HandlerList *pos; | ||
940 | const struct GNUNET_SERVER_MessageHandler *mh; | ||
941 | unsigned int i; | ||
942 | uint16_t type; | ||
943 | uint16_t size; | ||
944 | int found; | ||
945 | |||
946 | type = ntohs (message->type); | ||
947 | size = ntohs (message->size); | ||
948 | LOG (GNUNET_ERROR_TYPE_INFO, | ||
949 | "Received message of type %u and size %u from client\n", | ||
950 | type, size); | ||
951 | found = GNUNET_NO; | ||
952 | for (pos = server->handlers; NULL != pos; pos = pos->next) | ||
953 | { | ||
954 | i = 0; | ||
955 | while (pos->handlers[i].callback != NULL) | ||
956 | { | ||
957 | mh = &pos->handlers[i]; | ||
958 | if ((mh->type == type) || (mh->type == GNUNET_MESSAGE_TYPE_ALL)) | ||
959 | { | ||
960 | if ((0 != mh->expected_size) && (mh->expected_size != size)) | ||
961 | { | ||
962 | #if GNUNET8_NETWORK_IS_DEAD | ||
963 | LOG (GNUNET_ERROR_TYPE_WARNING, | ||
964 | "Expected %u bytes for message of type %u, got %u\n", | ||
965 | mh->expected_size, mh->type, size); | ||
966 | GNUNET_break_op (0); | ||
967 | #else | ||
968 | LOG (GNUNET_ERROR_TYPE_DEBUG, | ||
969 | "Expected %u bytes for message of type %u, got %u\n", | ||
970 | mh->expected_size, mh->type, size); | ||
971 | #endif | ||
972 | return GNUNET_SYSERR; | ||
973 | } | ||
974 | if (NULL != sender) | ||
975 | { | ||
976 | if ( (0 == sender->suspended) && | ||
977 | (NULL == sender->warn_task) ) | ||
978 | { | ||
979 | GNUNET_break (0 != type); /* type should never be 0 here, as we don't use 0 */ | ||
980 | sender->warn_start = GNUNET_TIME_absolute_get (); | ||
981 | sender->warn_task = | ||
982 | GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_MINUTES, | ||
983 | &warn_no_receive_done, | ||
984 | sender); | ||
985 | sender->warn_type = type; | ||
986 | } | ||
987 | sender->suspended++; | ||
988 | } | ||
989 | mh->callback (mh->callback_cls, sender, message); | ||
990 | found = GNUNET_YES; | ||
991 | } | ||
992 | i++; | ||
993 | } | ||
994 | } | ||
995 | if (GNUNET_NO == found) | ||
996 | { | ||
997 | LOG (GNUNET_ERROR_TYPE_DEBUG | GNUNET_ERROR_TYPE_BULK, | ||
998 | "Received message of unknown type %d\n", type); | ||
999 | if (GNUNET_YES == server->require_found) | ||
1000 | return GNUNET_SYSERR; | ||
1001 | } | ||
1002 | return GNUNET_OK; | ||
1003 | } | ||
1004 | |||
1005 | |||
1006 | /** | ||
1007 | * We are receiving an incoming message. Process it. | ||
1008 | * | ||
1009 | * @param cls our closure (handle for the client) | ||
1010 | * @param buf buffer with data received from network | ||
1011 | * @param available number of bytes available in buf | ||
1012 | * @param addr address of the sender | ||
1013 | * @param addrlen length of @a addr | ||
1014 | * @param errCode code indicating errors receiving, 0 for success | ||
1015 | */ | ||
1016 | static void | ||
1017 | process_incoming (void *cls, | ||
1018 | const void *buf, | ||
1019 | size_t available, | ||
1020 | const struct sockaddr *addr, | ||
1021 | socklen_t addrlen, | ||
1022 | int errCode); | ||
1023 | |||
1024 | |||
1025 | /** | ||
1026 | * Process messages from the client's message tokenizer until either | ||
1027 | * the tokenizer is empty (and then schedule receiving more), or | ||
1028 | * until some handler is not immediately done (then wait for restart_processing) | ||
1029 | * or shutdown. | ||
1030 | * | ||
1031 | * @param client the client to process, RC must have already been increased | ||
1032 | * using #GNUNET_SERVER_client_keep and will be decreased by one in this | ||
1033 | * function | ||
1034 | * @param ret #GNUNET_NO to start processing from the buffer, | ||
1035 | * #GNUNET_OK if the mst buffer is drained and we should instantly go back to receiving | ||
1036 | * #GNUNET_SYSERR if we should instantly abort due to error in a previous step | ||
1037 | */ | ||
1038 | static void | ||
1039 | process_mst (struct GNUNET_SERVER_Client *client, | ||
1040 | int ret) | ||
1041 | { | ||
1042 | while ((GNUNET_SYSERR != ret) && (NULL != client->server) && | ||
1043 | (GNUNET_YES != client->shutdown_now) && (0 == client->suspended)) | ||
1044 | { | ||
1045 | if (GNUNET_OK == ret) | ||
1046 | { | ||
1047 | LOG (GNUNET_ERROR_TYPE_DEBUG, | ||
1048 | "Server re-enters receive loop, timeout: %s.\n", | ||
1049 | GNUNET_STRINGS_relative_time_to_string (client->idle_timeout, GNUNET_YES)); | ||
1050 | client->receive_pending = GNUNET_YES; | ||
1051 | GNUNET_CONNECTION_receive (client->connection, | ||
1052 | GNUNET_SERVER_MAX_MESSAGE_SIZE - 1, | ||
1053 | client->idle_timeout, | ||
1054 | &process_incoming, | ||
1055 | client); | ||
1056 | break; | ||
1057 | } | ||
1058 | LOG (GNUNET_ERROR_TYPE_DEBUG, | ||
1059 | "Server processes additional messages instantly.\n"); | ||
1060 | if (NULL != client->server->mst_receive) | ||
1061 | ret = | ||
1062 | client->server->mst_receive (client->server->mst_cls, client->mst, | ||
1063 | client, NULL, 0, GNUNET_NO, GNUNET_YES); | ||
1064 | else | ||
1065 | ret = | ||
1066 | GNUNET_SERVER_mst_receive (client->mst, client, NULL, 0, GNUNET_NO, | ||
1067 | GNUNET_YES); | ||
1068 | } | ||
1069 | LOG (GNUNET_ERROR_TYPE_DEBUG, | ||
1070 | "Server leaves instant processing loop: ret = %d, server = %p, shutdown = %d, suspended = %u\n", | ||
1071 | ret, client->server, | ||
1072 | client->shutdown_now, | ||
1073 | client->suspended); | ||
1074 | if (GNUNET_NO == ret) | ||
1075 | { | ||
1076 | LOG (GNUNET_ERROR_TYPE_DEBUG, | ||
1077 | "Server has more data pending but is suspended.\n"); | ||
1078 | client->receive_pending = GNUNET_SYSERR; /* data pending */ | ||
1079 | } | ||
1080 | if ( (GNUNET_SYSERR == ret) || | ||
1081 | (GNUNET_YES == client->shutdown_now) ) | ||
1082 | GNUNET_SERVER_client_disconnect (client); | ||
1083 | } | ||
1084 | |||
1085 | |||
1086 | /** | ||
1087 | * We are receiving an incoming message. Process it. | ||
1088 | * | ||
1089 | * @param cls our closure (handle for the client) | ||
1090 | * @param buf buffer with data received from network | ||
1091 | * @param available number of bytes available in buf | ||
1092 | * @param addr address of the sender | ||
1093 | * @param addrlen length of @a addr | ||
1094 | * @param errCode code indicating errors receiving, 0 for success | ||
1095 | */ | ||
1096 | static void | ||
1097 | process_incoming (void *cls, | ||
1098 | const void *buf, | ||
1099 | size_t available, | ||
1100 | const struct sockaddr *addr, | ||
1101 | socklen_t addrlen, | ||
1102 | int errCode) | ||
1103 | { | ||
1104 | struct GNUNET_SERVER_Client *client = cls; | ||
1105 | struct GNUNET_SERVER_Handle *server = client->server; | ||
1106 | struct GNUNET_TIME_Absolute end; | ||
1107 | struct GNUNET_TIME_Absolute now; | ||
1108 | int ret; | ||
1109 | |||
1110 | GNUNET_assert (GNUNET_YES == client->receive_pending); | ||
1111 | client->receive_pending = GNUNET_NO; | ||
1112 | now = GNUNET_TIME_absolute_get (); | ||
1113 | end = GNUNET_TIME_absolute_add (client->last_activity, | ||
1114 | client->idle_timeout); | ||
1115 | |||
1116 | if ( (NULL == buf) && | ||
1117 | (0 == available) && | ||
1118 | (NULL == addr) && | ||
1119 | (0 == errCode) && | ||
1120 | (GNUNET_YES != client->shutdown_now) && | ||
1121 | (NULL != server) && | ||
1122 | (GNUNET_YES == GNUNET_CONNECTION_check (client->connection)) && | ||
1123 | (end.abs_value_us > now.abs_value_us) ) | ||
1124 | { | ||
1125 | /* wait longer, timeout changed (i.e. due to us sending) */ | ||
1126 | LOG (GNUNET_ERROR_TYPE_DEBUG, | ||
1127 | "Receive time out, but no disconnect due to sending (%p)\n", | ||
1128 | client); | ||
1129 | client->receive_pending = GNUNET_YES; | ||
1130 | GNUNET_CONNECTION_receive (client->connection, | ||
1131 | GNUNET_SERVER_MAX_MESSAGE_SIZE - 1, | ||
1132 | GNUNET_TIME_absolute_get_remaining (end), | ||
1133 | &process_incoming, | ||
1134 | client); | ||
1135 | return; | ||
1136 | } | ||
1137 | if ( (NULL == buf) || | ||
1138 | (0 == available) || | ||
1139 | (0 != errCode) || | ||
1140 | (NULL == server) || | ||
1141 | (GNUNET_YES == client->shutdown_now) || | ||
1142 | (GNUNET_YES != GNUNET_CONNECTION_check (client->connection)) ) | ||
1143 | { | ||
1144 | /* other side closed connection, error connecting, etc. */ | ||
1145 | LOG (GNUNET_ERROR_TYPE_DEBUG, | ||
1146 | "Failed to connect or other side closed connection (%p)\n", | ||
1147 | client); | ||
1148 | GNUNET_SERVER_client_disconnect (client); | ||
1149 | return; | ||
1150 | } | ||
1151 | LOG (GNUNET_ERROR_TYPE_DEBUG, | ||
1152 | "Server receives %u bytes from `%s'.\n", | ||
1153 | (unsigned int) available, | ||
1154 | GNUNET_a2s (addr, addrlen)); | ||
1155 | GNUNET_SERVER_client_keep (client); | ||
1156 | client->last_activity = now; | ||
1157 | |||
1158 | if (NULL != server->mst_receive) | ||
1159 | { | ||
1160 | ret = client->server->mst_receive (client->server->mst_cls, | ||
1161 | client->mst, | ||
1162 | client, | ||
1163 | buf, | ||
1164 | available, | ||
1165 | GNUNET_NO, | ||
1166 | GNUNET_YES); | ||
1167 | } | ||
1168 | else if (NULL != client->mst) | ||
1169 | { | ||
1170 | ret = | ||
1171 | GNUNET_SERVER_mst_receive (client->mst, | ||
1172 | client, | ||
1173 | buf, | ||
1174 | available, | ||
1175 | GNUNET_NO, | ||
1176 | GNUNET_YES); | ||
1177 | } | ||
1178 | else | ||
1179 | { | ||
1180 | GNUNET_break (0); | ||
1181 | return; | ||
1182 | } | ||
1183 | process_mst (client, | ||
1184 | ret); | ||
1185 | GNUNET_SERVER_client_drop (client); | ||
1186 | } | ||
1187 | |||
1188 | |||
1189 | /** | ||
1190 | * Task run to start again receiving from the network | ||
1191 | * and process requests. | ||
1192 | * | ||
1193 | * @param cls our `struct GNUNET_SERVER_Client *` to process more requests from | ||
1194 | */ | ||
1195 | static void | ||
1196 | restart_processing (void *cls) | ||
1197 | { | ||
1198 | struct GNUNET_SERVER_Client *client = cls; | ||
1199 | |||
1200 | GNUNET_assert (GNUNET_YES != client->shutdown_now); | ||
1201 | client->restart_task = NULL; | ||
1202 | if (GNUNET_NO == client->receive_pending) | ||
1203 | { | ||
1204 | LOG (GNUNET_ERROR_TYPE_DEBUG, "Server begins to read again from client.\n"); | ||
1205 | client->receive_pending = GNUNET_YES; | ||
1206 | GNUNET_CONNECTION_receive (client->connection, | ||
1207 | GNUNET_SERVER_MAX_MESSAGE_SIZE - 1, | ||
1208 | client->idle_timeout, | ||
1209 | &process_incoming, | ||
1210 | client); | ||
1211 | return; | ||
1212 | } | ||
1213 | LOG (GNUNET_ERROR_TYPE_DEBUG, | ||
1214 | "Server continues processing messages still in the buffer.\n"); | ||
1215 | GNUNET_SERVER_client_keep (client); | ||
1216 | client->receive_pending = GNUNET_NO; | ||
1217 | process_mst (client, | ||
1218 | GNUNET_NO); | ||
1219 | GNUNET_SERVER_client_drop (client); | ||
1220 | } | ||
1221 | |||
1222 | |||
1223 | /** | ||
1224 | * This function is called whenever our inbound message tokenizer has | ||
1225 | * received a complete message. | ||
1226 | * | ||
1227 | * @param cls closure (struct GNUNET_SERVER_Handle) | ||
1228 | * @param client identification of the client (`struct GNUNET_SERVER_Client *`) | ||
1229 | * @param message the actual message | ||
1230 | * | ||
1231 | * @return #GNUNET_OK on success, #GNUNET_SYSERR to stop further processing | ||
1232 | */ | ||
1233 | static int | ||
1234 | client_message_tokenizer_callback (void *cls, | ||
1235 | void *client, | ||
1236 | const struct GNUNET_MessageHeader *message) | ||
1237 | { | ||
1238 | struct GNUNET_SERVER_Handle *server = cls; | ||
1239 | struct GNUNET_SERVER_Client *sender = client; | ||
1240 | int ret; | ||
1241 | |||
1242 | LOG (GNUNET_ERROR_TYPE_DEBUG, | ||
1243 | "Tokenizer gives server message of type %u and size %u from client\n", | ||
1244 | ntohs (message->type), ntohs (message->size)); | ||
1245 | sender->in_process_client_buffer = GNUNET_YES; | ||
1246 | ret = GNUNET_SERVER_inject (server, sender, message); | ||
1247 | sender->in_process_client_buffer = GNUNET_NO; | ||
1248 | if ( (GNUNET_OK != ret) || (GNUNET_YES == sender->shutdown_now) ) | ||
1249 | { | ||
1250 | GNUNET_SERVER_client_disconnect (sender); | ||
1251 | return GNUNET_SYSERR; | ||
1252 | } | ||
1253 | return GNUNET_OK; | ||
1254 | } | ||
1255 | |||
1256 | |||
1257 | /** | ||
1258 | * Add a TCP socket-based connection to the set of handles managed by | ||
1259 | * this server. Use this function for outgoing (P2P) connections that | ||
1260 | * we initiated (and where this server should process incoming | ||
1261 | * messages). | ||
1262 | * | ||
1263 | * @param server the server to use | ||
1264 | * @param connection the connection to manage (client must | ||
1265 | * stop using this connection from now on) | ||
1266 | * @return the client handle | ||
1267 | */ | ||
1268 | struct GNUNET_SERVER_Client * | ||
1269 | GNUNET_SERVER_connect_socket (struct GNUNET_SERVER_Handle *server, | ||
1270 | struct GNUNET_CONNECTION_Handle *connection) | ||
1271 | { | ||
1272 | struct GNUNET_SERVER_Client *client; | ||
1273 | struct NotifyList *n; | ||
1274 | |||
1275 | client = GNUNET_new (struct GNUNET_SERVER_Client); | ||
1276 | client->connection = connection; | ||
1277 | client->server = server; | ||
1278 | client->last_activity = GNUNET_TIME_absolute_get (); | ||
1279 | client->idle_timeout = server->idle_timeout; | ||
1280 | GNUNET_CONTAINER_DLL_insert (server->clients_head, | ||
1281 | server->clients_tail, | ||
1282 | client); | ||
1283 | if (NULL != server->mst_create) | ||
1284 | client->mst = | ||
1285 | server->mst_create (server->mst_cls, client); | ||
1286 | else | ||
1287 | client->mst = | ||
1288 | GNUNET_SERVER_mst_create (&client_message_tokenizer_callback, | ||
1289 | server); | ||
1290 | GNUNET_assert (NULL != client->mst); | ||
1291 | for (n = server->connect_notify_list_head; NULL != n; n = n->next) | ||
1292 | n->callback (n->callback_cls, client); | ||
1293 | client->receive_pending = GNUNET_YES; | ||
1294 | GNUNET_CONNECTION_receive (client->connection, | ||
1295 | GNUNET_SERVER_MAX_MESSAGE_SIZE - 1, | ||
1296 | client->idle_timeout, | ||
1297 | &process_incoming, | ||
1298 | client); | ||
1299 | return client; | ||
1300 | } | ||
1301 | |||
1302 | |||
1303 | /** | ||
1304 | * Change the timeout for a particular client. Decreasing the timeout | ||
1305 | * may not go into effect immediately (only after the previous timeout | ||
1306 | * times out or activity happens on the socket). | ||
1307 | * | ||
1308 | * @param client the client to update | ||
1309 | * @param timeout new timeout for activities on the socket | ||
1310 | */ | ||
1311 | void | ||
1312 | GNUNET_SERVER_client_set_timeout (struct GNUNET_SERVER_Client *client, | ||
1313 | struct GNUNET_TIME_Relative timeout) | ||
1314 | { | ||
1315 | client->idle_timeout = timeout; | ||
1316 | } | ||
1317 | |||
1318 | |||
1319 | /** | ||
1320 | * Notify the server that the given client handle should | ||
1321 | * be kept (keeps the connection up if possible, increments | ||
1322 | * the internal reference counter). | ||
1323 | * | ||
1324 | * @param client the client to keep | ||
1325 | */ | ||
1326 | void | ||
1327 | GNUNET_SERVER_client_keep (struct GNUNET_SERVER_Client *client) | ||
1328 | { | ||
1329 | client->reference_count++; | ||
1330 | } | ||
1331 | |||
1332 | |||
1333 | /** | ||
1334 | * Notify the server that the given client handle is no | ||
1335 | * longer required. Decrements the reference counter. If | ||
1336 | * that counter reaches zero an inactive connection maybe | ||
1337 | * closed. | ||
1338 | * | ||
1339 | * @param client the client to drop | ||
1340 | */ | ||
1341 | void | ||
1342 | GNUNET_SERVER_client_drop (struct GNUNET_SERVER_Client *client) | ||
1343 | { | ||
1344 | GNUNET_assert (client->reference_count > 0); | ||
1345 | client->reference_count--; | ||
1346 | if ((GNUNET_YES == client->shutdown_now) && (0 == client->reference_count)) | ||
1347 | GNUNET_SERVER_client_disconnect (client); | ||
1348 | } | ||
1349 | |||
1350 | |||
1351 | /** | ||
1352 | * Obtain the network address of the other party. | ||
1353 | * | ||
1354 | * @param client the client to get the address for | ||
1355 | * @param addr where to store the address | ||
1356 | * @param addrlen where to store the length of the @a addr | ||
1357 | * @return #GNUNET_OK on success | ||
1358 | */ | ||
1359 | int | ||
1360 | GNUNET_SERVER_client_get_address (struct GNUNET_SERVER_Client *client, | ||
1361 | void **addr, size_t * addrlen) | ||
1362 | { | ||
1363 | return GNUNET_CONNECTION_get_address (client->connection, addr, addrlen); | ||
1364 | } | ||
1365 | |||
1366 | |||
1367 | /** | ||
1368 | * Ask the server to notify us whenever a client disconnects. | ||
1369 | * This function is called whenever the actual network connection | ||
1370 | * is closed; the reference count may be zero or larger than zero | ||
1371 | * at this point. | ||
1372 | * | ||
1373 | * @param server the server manageing the clients | ||
1374 | * @param callback function to call on disconnect | ||
1375 | * @param callback_cls closure for @a callback | ||
1376 | */ | ||
1377 | void | ||
1378 | GNUNET_SERVER_disconnect_notify (struct GNUNET_SERVER_Handle *server, | ||
1379 | GNUNET_SERVER_DisconnectCallback callback, | ||
1380 | void *callback_cls) | ||
1381 | { | ||
1382 | struct NotifyList *n; | ||
1383 | |||
1384 | n = GNUNET_new (struct NotifyList); | ||
1385 | n->callback = callback; | ||
1386 | n->callback_cls = callback_cls; | ||
1387 | GNUNET_CONTAINER_DLL_insert (server->disconnect_notify_list_head, | ||
1388 | server->disconnect_notify_list_tail, | ||
1389 | n); | ||
1390 | } | ||
1391 | |||
1392 | |||
1393 | /** | ||
1394 | * Ask the server to notify us whenever a client connects. | ||
1395 | * This function is called whenever the actual network connection | ||
1396 | * is opened. If the server is destroyed before this | ||
1397 | * notification is explicitly cancelled, the 'callback' will | ||
1398 | * once be called with a 'client' argument of NULL to indicate | ||
1399 | * that the server itself is now gone (and that the callback | ||
1400 | * won't be called anymore and also can no longer be cancelled). | ||
1401 | * | ||
1402 | * @param server the server manageing the clients | ||
1403 | * @param callback function to call on sconnect | ||
1404 | * @param callback_cls closure for @a callback | ||
1405 | */ | ||
1406 | void | ||
1407 | GNUNET_SERVER_connect_notify (struct GNUNET_SERVER_Handle *server, | ||
1408 | GNUNET_SERVER_ConnectCallback callback, | ||
1409 | void *callback_cls) | ||
1410 | { | ||
1411 | struct NotifyList *n; | ||
1412 | struct GNUNET_SERVER_Client *client; | ||
1413 | |||
1414 | n = GNUNET_new (struct NotifyList); | ||
1415 | n->callback = callback; | ||
1416 | n->callback_cls = callback_cls; | ||
1417 | GNUNET_CONTAINER_DLL_insert (server->connect_notify_list_head, | ||
1418 | server->connect_notify_list_tail, | ||
1419 | n); | ||
1420 | for (client = server->clients_head; NULL != client; client = client->next) | ||
1421 | callback (callback_cls, client); | ||
1422 | } | ||
1423 | |||
1424 | |||
1425 | /** | ||
1426 | * Ask the server to stop notifying us whenever a client connects. | ||
1427 | * | ||
1428 | * @param server the server manageing the clients | ||
1429 | * @param callback function to call on connect | ||
1430 | * @param callback_cls closure for @a callback | ||
1431 | */ | ||
1432 | void | ||
1433 | GNUNET_SERVER_disconnect_notify_cancel (struct GNUNET_SERVER_Handle *server, | ||
1434 | GNUNET_SERVER_DisconnectCallback callback, | ||
1435 | void *callback_cls) | ||
1436 | { | ||
1437 | struct NotifyList *pos; | ||
1438 | |||
1439 | for (pos = server->disconnect_notify_list_head; NULL != pos; pos = pos->next) | ||
1440 | if ((pos->callback == callback) && (pos->callback_cls == callback_cls)) | ||
1441 | break; | ||
1442 | if (NULL == pos) | ||
1443 | { | ||
1444 | GNUNET_break (0); | ||
1445 | return; | ||
1446 | } | ||
1447 | GNUNET_CONTAINER_DLL_remove (server->disconnect_notify_list_head, | ||
1448 | server->disconnect_notify_list_tail, | ||
1449 | pos); | ||
1450 | GNUNET_free (pos); | ||
1451 | } | ||
1452 | |||
1453 | |||
1454 | /** | ||
1455 | * Ask the server to stop notifying us whenever a client disconnects. | ||
1456 | * | ||
1457 | * @param server the server manageing the clients | ||
1458 | * @param callback function to call on disconnect | ||
1459 | * @param callback_cls closure for @a callback | ||
1460 | */ | ||
1461 | void | ||
1462 | GNUNET_SERVER_connect_notify_cancel (struct GNUNET_SERVER_Handle *server, | ||
1463 | GNUNET_SERVER_ConnectCallback callback, | ||
1464 | void *callback_cls) | ||
1465 | { | ||
1466 | struct NotifyList *pos; | ||
1467 | |||
1468 | for (pos = server->connect_notify_list_head; NULL != pos; pos = pos->next) | ||
1469 | if ((pos->callback == callback) && (pos->callback_cls == callback_cls)) | ||
1470 | break; | ||
1471 | if (NULL == pos) | ||
1472 | { | ||
1473 | GNUNET_break (0); | ||
1474 | return; | ||
1475 | } | ||
1476 | GNUNET_CONTAINER_DLL_remove (server->connect_notify_list_head, | ||
1477 | server->connect_notify_list_tail, | ||
1478 | pos); | ||
1479 | GNUNET_free (pos); | ||
1480 | } | ||
1481 | |||
1482 | |||
1483 | /** | ||
1484 | * Destroy the connection that is passed in via @a cls. Used | ||
1485 | * as calling #GNUNET_CONNECTION_destroy from within a function | ||
1486 | * that was itself called from within process_notify() of | ||
1487 | * 'connection.c' is not allowed (see #2329). | ||
1488 | * | ||
1489 | * @param cls connection to destroy | ||
1490 | */ | ||
1491 | static void | ||
1492 | destroy_connection (void *cls) | ||
1493 | { | ||
1494 | struct GNUNET_CONNECTION_Handle *connection = cls; | ||
1495 | |||
1496 | GNUNET_CONNECTION_destroy (connection); | ||
1497 | } | ||
1498 | |||
1499 | |||
1500 | /** | ||
1501 | * Ask the server to disconnect from the given client. | ||
1502 | * This is the same as returning #GNUNET_SYSERR from a message | ||
1503 | * handler, except that it allows dropping of a client even | ||
1504 | * when not handling a message from that client. | ||
1505 | * | ||
1506 | * @param client the client to disconnect from | ||
1507 | */ | ||
1508 | void | ||
1509 | GNUNET_SERVER_client_disconnect (struct GNUNET_SERVER_Client *client) | ||
1510 | { | ||
1511 | struct GNUNET_SERVER_Handle *server = client->server; | ||
1512 | struct NotifyList *n; | ||
1513 | |||
1514 | LOG (GNUNET_ERROR_TYPE_DEBUG, | ||
1515 | "Client is being disconnected from the server.\n"); | ||
1516 | if (NULL != client->restart_task) | ||
1517 | { | ||
1518 | GNUNET_SCHEDULER_cancel (client->restart_task); | ||
1519 | client->restart_task = NULL; | ||
1520 | } | ||
1521 | if (NULL != client->warn_task) | ||
1522 | { | ||
1523 | GNUNET_SCHEDULER_cancel (client->warn_task); | ||
1524 | client->warn_task = NULL; | ||
1525 | } | ||
1526 | if (GNUNET_YES == client->receive_pending) | ||
1527 | { | ||
1528 | GNUNET_CONNECTION_receive_cancel (client->connection); | ||
1529 | client->receive_pending = GNUNET_NO; | ||
1530 | } | ||
1531 | client->shutdown_now = GNUNET_YES; | ||
1532 | client->reference_count++; /* make sure nobody else clean up client... */ | ||
1533 | if ( (NULL != client->mst) && | ||
1534 | (NULL != server) ) | ||
1535 | { | ||
1536 | GNUNET_CONTAINER_DLL_remove (server->clients_head, | ||
1537 | server->clients_tail, | ||
1538 | client); | ||
1539 | if (NULL != server->mst_destroy) | ||
1540 | server->mst_destroy (server->mst_cls, | ||
1541 | client->mst); | ||
1542 | else | ||
1543 | GNUNET_SERVER_mst_destroy (client->mst); | ||
1544 | client->mst = NULL; | ||
1545 | for (n = server->disconnect_notify_list_head; NULL != n; n = n->next) | ||
1546 | n->callback (n->callback_cls, | ||
1547 | client); | ||
1548 | } | ||
1549 | client->reference_count--; | ||
1550 | if (client->reference_count > 0) | ||
1551 | { | ||
1552 | LOG (GNUNET_ERROR_TYPE_DEBUG, | ||
1553 | "RC of %p still positive, not destroying everything.\n", | ||
1554 | client); | ||
1555 | client->server = NULL; | ||
1556 | return; | ||
1557 | } | ||
1558 | if (GNUNET_YES == client->in_process_client_buffer) | ||
1559 | { | ||
1560 | LOG (GNUNET_ERROR_TYPE_DEBUG, | ||
1561 | "Still processing inputs of %p, not destroying everything.\n", | ||
1562 | client); | ||
1563 | return; | ||
1564 | } | ||
1565 | LOG (GNUNET_ERROR_TYPE_DEBUG, | ||
1566 | "RC of %p now zero, destroying everything.\n", | ||
1567 | client); | ||
1568 | if (GNUNET_YES == client->persist) | ||
1569 | GNUNET_CONNECTION_persist_ (client->connection); | ||
1570 | if (NULL != client->th.cth) | ||
1571 | GNUNET_SERVER_notify_transmit_ready_cancel (&client->th); | ||
1572 | (void) GNUNET_SCHEDULER_add_now (&destroy_connection, | ||
1573 | client->connection); | ||
1574 | /* need to cancel again, as it might have been re-added | ||
1575 | in the meantime (i.e. during callbacks) */ | ||
1576 | if (NULL != client->warn_task) | ||
1577 | { | ||
1578 | GNUNET_SCHEDULER_cancel (client->warn_task); | ||
1579 | client->warn_task = NULL; | ||
1580 | } | ||
1581 | if (GNUNET_YES == client->receive_pending) | ||
1582 | { | ||
1583 | GNUNET_CONNECTION_receive_cancel (client->connection); | ||
1584 | client->receive_pending = GNUNET_NO; | ||
1585 | } | ||
1586 | GNUNET_free (client); | ||
1587 | /* we might be in soft-shutdown, test if we're done */ | ||
1588 | if (NULL != server) | ||
1589 | test_monitor_clients (server); | ||
1590 | } | ||
1591 | |||
1592 | |||
1593 | /** | ||
1594 | * Disable the "CORK" feature for communication with the given client, | ||
1595 | * forcing the OS to immediately flush the buffer on transmission | ||
1596 | * instead of potentially buffering multiple messages. | ||
1597 | * | ||
1598 | * @param client handle to the client | ||
1599 | * @return #GNUNET_OK on success | ||
1600 | */ | ||
1601 | int | ||
1602 | GNUNET_SERVER_client_disable_corking (struct GNUNET_SERVER_Client *client) | ||
1603 | { | ||
1604 | return GNUNET_CONNECTION_disable_corking (client->connection); | ||
1605 | } | ||
1606 | |||
1607 | |||
1608 | /** | ||
1609 | * Wrapper for transmission notification that calls the original | ||
1610 | * callback and update the last activity time for our connection. | ||
1611 | * | ||
1612 | * @param cls the `struct GNUNET_SERVER_Client *` | ||
1613 | * @param size number of bytes we can transmit | ||
1614 | * @param buf where to copy the message | ||
1615 | * @return number of bytes actually transmitted | ||
1616 | */ | ||
1617 | static size_t | ||
1618 | transmit_ready_callback_wrapper (void *cls, size_t size, void *buf) | ||
1619 | { | ||
1620 | struct GNUNET_SERVER_Client *client = cls; | ||
1621 | GNUNET_CONNECTION_TransmitReadyNotify callback; | ||
1622 | |||
1623 | client->th.cth = NULL; | ||
1624 | callback = client->th.callback; | ||
1625 | client->th.callback = NULL; | ||
1626 | client->last_activity = GNUNET_TIME_absolute_get (); | ||
1627 | return callback (client->th.callback_cls, size, buf); | ||
1628 | } | ||
1629 | |||
1630 | |||
1631 | /** | ||
1632 | * Notify us when the server has enough space to transmit | ||
1633 | * a message of the given size to the given client. | ||
1634 | * | ||
1635 | * @param client client to transmit message to | ||
1636 | * @param size requested amount of buffer space | ||
1637 | * @param timeout after how long should we give up (and call | ||
1638 | * notify with buf NULL and size 0)? | ||
1639 | * @param callback function to call when space is available | ||
1640 | * @param callback_cls closure for @a callback | ||
1641 | * @return non-NULL if the notify callback was queued; can be used | ||
1642 | * to cancel the request using | ||
1643 | * #GNUNET_SERVER_notify_transmit_ready_cancel(). | ||
1644 | * NULL if we are already going to notify someone else (busy) | ||
1645 | */ | ||
1646 | struct GNUNET_SERVER_TransmitHandle * | ||
1647 | GNUNET_SERVER_notify_transmit_ready (struct GNUNET_SERVER_Client *client, | ||
1648 | size_t size, | ||
1649 | struct GNUNET_TIME_Relative timeout, | ||
1650 | GNUNET_CONNECTION_TransmitReadyNotify callback, | ||
1651 | void *callback_cls) | ||
1652 | { | ||
1653 | if (NULL != client->th.callback) | ||
1654 | return NULL; | ||
1655 | client->th.callback_cls = callback_cls; | ||
1656 | client->th.callback = callback; | ||
1657 | client->th.cth = GNUNET_CONNECTION_notify_transmit_ready (client->connection, size, | ||
1658 | timeout, | ||
1659 | &transmit_ready_callback_wrapper, | ||
1660 | client); | ||
1661 | return &client->th; | ||
1662 | } | ||
1663 | |||
1664 | |||
1665 | /** | ||
1666 | * Abort transmission request. | ||
1667 | * | ||
1668 | * @param th request to abort | ||
1669 | */ | ||
1670 | void | ||
1671 | GNUNET_SERVER_notify_transmit_ready_cancel (struct GNUNET_SERVER_TransmitHandle *th) | ||
1672 | { | ||
1673 | GNUNET_CONNECTION_notify_transmit_ready_cancel (th->cth); | ||
1674 | th->cth = NULL; | ||
1675 | th->callback = NULL; | ||
1676 | } | ||
1677 | |||
1678 | |||
1679 | /** | ||
1680 | * Set the persistent flag on this client, used to setup client connection | ||
1681 | * to only be killed when the service it's connected to is actually dead. | ||
1682 | * | ||
1683 | * @param client the client to set the persistent flag on | ||
1684 | */ | ||
1685 | void | ||
1686 | GNUNET_SERVER_client_persist_ (struct GNUNET_SERVER_Client *client) | ||
1687 | { | ||
1688 | client->persist = GNUNET_YES; | ||
1689 | } | ||
1690 | |||
1691 | |||
1692 | /** | ||
1693 | * Resume receiving from this client, we are done processing the | ||
1694 | * current request. This function must be called from within each | ||
1695 | * GNUNET_SERVER_MessageCallback (or its respective continuations). | ||
1696 | * | ||
1697 | * @param client client we were processing a message of | ||
1698 | * @param success #GNUNET_OK to keep the connection open and | ||
1699 | * continue to receive | ||
1700 | * #GNUNET_NO to close the connection (normal behavior) | ||
1701 | * #GNUNET_SYSERR to close the connection (signal | ||
1702 | * serious error) | ||
1703 | */ | ||
1704 | void | ||
1705 | GNUNET_SERVER_receive_done (struct GNUNET_SERVER_Client *client, | ||
1706 | int success) | ||
1707 | { | ||
1708 | if (NULL == client) | ||
1709 | return; | ||
1710 | GNUNET_assert (client->suspended > 0); | ||
1711 | client->suspended--; | ||
1712 | if (GNUNET_OK != success) | ||
1713 | { | ||
1714 | LOG (GNUNET_ERROR_TYPE_DEBUG, | ||
1715 | "GNUNET_SERVER_receive_done called with failure indication\n"); | ||
1716 | if ( (client->reference_count > 0) || (client->suspended > 0) ) | ||
1717 | client->shutdown_now = GNUNET_YES; | ||
1718 | else | ||
1719 | GNUNET_SERVER_client_disconnect (client); | ||
1720 | return; | ||
1721 | } | ||
1722 | if (client->suspended > 0) | ||
1723 | { | ||
1724 | LOG (GNUNET_ERROR_TYPE_DEBUG, | ||
1725 | "GNUNET_SERVER_receive_done called, but more clients pending\n"); | ||
1726 | return; | ||
1727 | } | ||
1728 | if (NULL != client->warn_task) | ||
1729 | { | ||
1730 | GNUNET_SCHEDULER_cancel (client->warn_task); | ||
1731 | client->warn_task = NULL; | ||
1732 | } | ||
1733 | if (GNUNET_YES == client->in_process_client_buffer) | ||
1734 | { | ||
1735 | LOG (GNUNET_ERROR_TYPE_DEBUG, | ||
1736 | "GNUNET_SERVER_receive_done called while still in processing loop\n"); | ||
1737 | return; | ||
1738 | } | ||
1739 | if ((NULL == client->server) || (GNUNET_YES == client->shutdown_now)) | ||
1740 | { | ||
1741 | GNUNET_SERVER_client_disconnect (client); | ||
1742 | return; | ||
1743 | } | ||
1744 | LOG (GNUNET_ERROR_TYPE_DEBUG, | ||
1745 | "GNUNET_SERVER_receive_done causes restart in reading from the socket\n"); | ||
1746 | GNUNET_assert (NULL == client->restart_task); | ||
1747 | client->restart_task = GNUNET_SCHEDULER_add_now (&restart_processing, | ||
1748 | client); | ||
1749 | } | ||
1750 | |||
1751 | |||
1752 | /* end of server.c */ | ||