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Diffstat (limited to 'src/transport/tcp_connection_legacy.c')
-rw-r--r-- | src/transport/tcp_connection_legacy.c | 1647 |
1 files changed, 1647 insertions, 0 deletions
diff --git a/src/transport/tcp_connection_legacy.c b/src/transport/tcp_connection_legacy.c new file mode 100644 index 000000000..f5253445d --- /dev/null +++ b/src/transport/tcp_connection_legacy.c | |||
@@ -0,0 +1,1647 @@ | |||
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/connection.c | ||
23 | * @brief TCP connection management | ||
24 | * @author Christian Grothoff | ||
25 | * | ||
26 | * This code is rather complex. Only modify it if you | ||
27 | * 1) Have a NEW testcase showing that the new code | ||
28 | * is needed and correct | ||
29 | * 2) All EXISTING testcases pass with the new code | ||
30 | * These rules should apply in general, but for this | ||
31 | * module they are VERY, VERY important. | ||
32 | */ | ||
33 | #include "platform.h" | ||
34 | #include "gnunet_util_lib.h" | ||
35 | #include "gnunet_resolver_service.h" | ||
36 | |||
37 | |||
38 | |||
39 | #define LOG_STRERROR(kind,syscall) GNUNET_log_from_strerror (kind, "util-connection", syscall) | ||
40 | |||
41 | |||
42 | /** | ||
43 | * Transmission handle. There can only be one for each connection. | ||
44 | */ | ||
45 | struct GNUNET_CONNECTION_TransmitHandle | ||
46 | { | ||
47 | |||
48 | /** | ||
49 | * Function to call if the send buffer has notify_size | ||
50 | * bytes available. | ||
51 | */ | ||
52 | GNUNET_CONNECTION_TransmitReadyNotify notify_ready; | ||
53 | |||
54 | /** | ||
55 | * Closure for notify_ready. | ||
56 | */ | ||
57 | void *notify_ready_cls; | ||
58 | |||
59 | /** | ||
60 | * Our connection handle. | ||
61 | */ | ||
62 | struct GNUNET_CONNECTION_Handle *connection; | ||
63 | |||
64 | /** | ||
65 | * Timeout for receiving (in absolute time). | ||
66 | */ | ||
67 | struct GNUNET_TIME_Absolute transmit_timeout; | ||
68 | |||
69 | /** | ||
70 | * Task called on timeout. | ||
71 | */ | ||
72 | struct GNUNET_SCHEDULER_Task * timeout_task; | ||
73 | |||
74 | /** | ||
75 | * At what number of bytes available in the | ||
76 | * write buffer should the notify method be called? | ||
77 | */ | ||
78 | size_t notify_size; | ||
79 | |||
80 | }; | ||
81 | |||
82 | |||
83 | /** | ||
84 | * During connect, we try multiple possible IP addresses | ||
85 | * to find out which one might work. | ||
86 | */ | ||
87 | struct AddressProbe | ||
88 | { | ||
89 | |||
90 | /** | ||
91 | * This is a linked list. | ||
92 | */ | ||
93 | struct AddressProbe *next; | ||
94 | |||
95 | /** | ||
96 | * This is a doubly-linked list. | ||
97 | */ | ||
98 | struct AddressProbe *prev; | ||
99 | |||
100 | /** | ||
101 | * The address; do not free (allocated at the end of this struct). | ||
102 | */ | ||
103 | const struct sockaddr *addr; | ||
104 | |||
105 | /** | ||
106 | * Underlying OS's socket. | ||
107 | */ | ||
108 | struct GNUNET_NETWORK_Handle *sock; | ||
109 | |||
110 | /** | ||
111 | * Connection for which we are probing. | ||
112 | */ | ||
113 | struct GNUNET_CONNECTION_Handle *connection; | ||
114 | |||
115 | /** | ||
116 | * Lenth of addr. | ||
117 | */ | ||
118 | socklen_t addrlen; | ||
119 | |||
120 | /** | ||
121 | * Task waiting for the connection to finish connecting. | ||
122 | */ | ||
123 | struct GNUNET_SCHEDULER_Task * task; | ||
124 | }; | ||
125 | |||
126 | |||
127 | /** | ||
128 | * @brief handle for a network connection | ||
129 | */ | ||
130 | struct GNUNET_CONNECTION_Handle | ||
131 | { | ||
132 | |||
133 | /** | ||
134 | * Configuration to use. | ||
135 | */ | ||
136 | const struct GNUNET_CONFIGURATION_Handle *cfg; | ||
137 | |||
138 | /** | ||
139 | * Linked list of sockets we are currently trying out | ||
140 | * (during connect). | ||
141 | */ | ||
142 | struct AddressProbe *ap_head; | ||
143 | |||
144 | /** | ||
145 | * Linked list of sockets we are currently trying out | ||
146 | * (during connect). | ||
147 | */ | ||
148 | struct AddressProbe *ap_tail; | ||
149 | |||
150 | /** | ||
151 | * Network address of the other end-point, may be NULL. | ||
152 | */ | ||
153 | struct sockaddr *addr; | ||
154 | |||
155 | /** | ||
156 | * Pointer to the hostname if connection was | ||
157 | * created using DNS lookup, otherwise NULL. | ||
158 | */ | ||
159 | char *hostname; | ||
160 | |||
161 | /** | ||
162 | * Underlying OS's socket, set to NULL after fatal errors. | ||
163 | */ | ||
164 | struct GNUNET_NETWORK_Handle *sock; | ||
165 | |||
166 | /** | ||
167 | * Function to call on data received, NULL if no receive is pending. | ||
168 | */ | ||
169 | GNUNET_CONNECTION_Receiver receiver; | ||
170 | |||
171 | /** | ||
172 | * Closure for @e receiver. | ||
173 | */ | ||
174 | void *receiver_cls; | ||
175 | |||
176 | /** | ||
177 | * Pointer to our write buffer. | ||
178 | */ | ||
179 | char *write_buffer; | ||
180 | |||
181 | /** | ||
182 | * Current size of our @e write_buffer. | ||
183 | */ | ||
184 | size_t write_buffer_size; | ||
185 | |||
186 | /** | ||
187 | * Current write-offset in @e write_buffer (where | ||
188 | * would we write next). | ||
189 | */ | ||
190 | size_t write_buffer_off; | ||
191 | |||
192 | /** | ||
193 | * Current read-offset in @e write_buffer (how many | ||
194 | * bytes have already been sent). | ||
195 | */ | ||
196 | size_t write_buffer_pos; | ||
197 | |||
198 | /** | ||
199 | * Length of @e addr. | ||
200 | */ | ||
201 | socklen_t addrlen; | ||
202 | |||
203 | /** | ||
204 | * Read task that we may need to wait for. | ||
205 | */ | ||
206 | struct GNUNET_SCHEDULER_Task *read_task; | ||
207 | |||
208 | /** | ||
209 | * Write task that we may need to wait for. | ||
210 | */ | ||
211 | struct GNUNET_SCHEDULER_Task *write_task; | ||
212 | |||
213 | /** | ||
214 | * Handle to a pending DNS lookup request. | ||
215 | */ | ||
216 | struct GNUNET_RESOLVER_RequestHandle *dns_active; | ||
217 | |||
218 | /** | ||
219 | * The handle we return for #GNUNET_CONNECTION_notify_transmit_ready(). | ||
220 | */ | ||
221 | struct GNUNET_CONNECTION_TransmitHandle nth; | ||
222 | |||
223 | /** | ||
224 | * Timeout for receiving (in absolute time). | ||
225 | */ | ||
226 | struct GNUNET_TIME_Absolute receive_timeout; | ||
227 | |||
228 | /** | ||
229 | * Maximum number of bytes to read (for receiving). | ||
230 | */ | ||
231 | size_t max; | ||
232 | |||
233 | /** | ||
234 | * Port to connect to. | ||
235 | */ | ||
236 | uint16_t port; | ||
237 | |||
238 | /** | ||
239 | * When shutdown, do not ever actually close the socket, but | ||
240 | * free resources. Only should ever be set if using program | ||
241 | * termination as a signal (because only then will the leaked | ||
242 | * socket be freed!) | ||
243 | */ | ||
244 | int8_t persist; | ||
245 | |||
246 | /** | ||
247 | * Usually 0. Set to 1 if this handle is in use, and should | ||
248 | * #GNUNET_CONNECTION_destroy() be called right now, the action needs | ||
249 | * to be deferred by setting it to -1. | ||
250 | */ | ||
251 | int8_t destroy_later; | ||
252 | |||
253 | /** | ||
254 | * Handle to subsequent connection after proxy handshake completes, | ||
255 | */ | ||
256 | struct GNUNET_CONNECTION_Handle *proxy_handshake; | ||
257 | |||
258 | }; | ||
259 | |||
260 | |||
261 | /** | ||
262 | * Set the persist option on this connection handle. Indicates | ||
263 | * that the underlying socket or fd should never really be closed. | ||
264 | * Used for indicating process death. | ||
265 | * | ||
266 | * @param connection the connection to set persistent | ||
267 | */ | ||
268 | void | ||
269 | GNUNET_CONNECTION_persist_ (struct GNUNET_CONNECTION_Handle *connection) | ||
270 | { | ||
271 | connection->persist = GNUNET_YES; | ||
272 | } | ||
273 | |||
274 | |||
275 | /** | ||
276 | * Disable the "CORK" feature for communication with the given connection, | ||
277 | * forcing the OS to immediately flush the buffer on transmission | ||
278 | * instead of potentially buffering multiple messages. Essentially | ||
279 | * reduces the OS send buffers to zero. | ||
280 | * Used to make sure that the last messages sent through the connection | ||
281 | * reach the other side before the process is terminated. | ||
282 | * | ||
283 | * @param connection the connection to make flushing and blocking | ||
284 | * @return #GNUNET_OK on success | ||
285 | */ | ||
286 | int | ||
287 | GNUNET_CONNECTION_disable_corking (struct GNUNET_CONNECTION_Handle *connection) | ||
288 | { | ||
289 | return GNUNET_NETWORK_socket_disable_corking (connection->sock); | ||
290 | } | ||
291 | |||
292 | |||
293 | /** | ||
294 | * Create a connection handle by boxing an existing OS socket. The OS | ||
295 | * socket should henceforth be no longer used directly. | ||
296 | * #GNUNET_connection_destroy() will close it. | ||
297 | * | ||
298 | * @param osSocket existing socket to box | ||
299 | * @return the boxed connection handle | ||
300 | */ | ||
301 | struct GNUNET_CONNECTION_Handle * | ||
302 | GNUNET_CONNECTION_create_from_existing (struct GNUNET_NETWORK_Handle *osSocket) | ||
303 | { | ||
304 | struct GNUNET_CONNECTION_Handle *connection; | ||
305 | |||
306 | connection = GNUNET_new (struct GNUNET_CONNECTION_Handle); | ||
307 | connection->write_buffer_size = GNUNET_SERVER_MIN_BUFFER_SIZE; | ||
308 | connection->write_buffer = GNUNET_malloc (connection->write_buffer_size); | ||
309 | connection->sock = osSocket; | ||
310 | return connection; | ||
311 | } | ||
312 | |||
313 | |||
314 | /** | ||
315 | * Create a connection handle by accepting on a listen socket. This | ||
316 | * function may block if the listen socket has no connection ready. | ||
317 | * | ||
318 | * @param access_cb function to use to check if access is allowed | ||
319 | * @param access_cb_cls closure for @a access_cb | ||
320 | * @param lsock listen socket | ||
321 | * @return the connection handle, NULL on error | ||
322 | */ | ||
323 | struct GNUNET_CONNECTION_Handle * | ||
324 | GNUNET_CONNECTION_create_from_accept (GNUNET_CONNECTION_AccessCheck access_cb, | ||
325 | void *access_cb_cls, | ||
326 | struct GNUNET_NETWORK_Handle *lsock) | ||
327 | { | ||
328 | struct GNUNET_CONNECTION_Handle *connection; | ||
329 | char addr[128]; | ||
330 | socklen_t addrlen; | ||
331 | struct GNUNET_NETWORK_Handle *sock; | ||
332 | int aret; | ||
333 | struct sockaddr_in *v4; | ||
334 | struct sockaddr_in6 *v6; | ||
335 | struct sockaddr *sa; | ||
336 | void *uaddr; | ||
337 | #ifdef SO_PEERCRED | ||
338 | struct ucred uc; | ||
339 | socklen_t olen; | ||
340 | #endif | ||
341 | struct GNUNET_CONNECTION_Credentials *gcp; | ||
342 | #if HAVE_GETPEEREID || defined(SO_PEERCRED) || HAVE_GETPEERUCRED | ||
343 | struct GNUNET_CONNECTION_Credentials gc; | ||
344 | |||
345 | gc.uid = 0; | ||
346 | gc.gid = 0; | ||
347 | #endif | ||
348 | |||
349 | addrlen = sizeof (addr); | ||
350 | sock = | ||
351 | GNUNET_NETWORK_socket_accept (lsock, | ||
352 | (struct sockaddr *) &addr, | ||
353 | &addrlen); | ||
354 | if (NULL == sock) | ||
355 | { | ||
356 | if (EAGAIN != errno) | ||
357 | LOG_STRERROR (GNUNET_ERROR_TYPE_WARNING, "accept"); | ||
358 | return NULL; | ||
359 | } | ||
360 | if ((addrlen > sizeof (addr)) || (addrlen < sizeof (sa_family_t))) | ||
361 | { | ||
362 | GNUNET_break (0); | ||
363 | GNUNET_break (GNUNET_OK == GNUNET_NETWORK_socket_close (sock)); | ||
364 | return NULL; | ||
365 | } | ||
366 | |||
367 | sa = (struct sockaddr *) addr; | ||
368 | v6 = (struct sockaddr_in6 *) addr; | ||
369 | if ( (AF_INET6 == sa->sa_family) && | ||
370 | (IN6_IS_ADDR_V4MAPPED (&v6->sin6_addr)) ) | ||
371 | { | ||
372 | /* convert to V4 address */ | ||
373 | v4 = GNUNET_new (struct sockaddr_in); | ||
374 | memset (v4, 0, sizeof (struct sockaddr_in)); | ||
375 | v4->sin_family = AF_INET; | ||
376 | #if HAVE_SOCKADDR_IN_SIN_LEN | ||
377 | v4->sin_len = (u_char) sizeof (struct sockaddr_in); | ||
378 | #endif | ||
379 | GNUNET_memcpy (&v4->sin_addr, | ||
380 | &((char *) &v6->sin6_addr)[sizeof (struct in6_addr) - | ||
381 | sizeof (struct in_addr)], | ||
382 | sizeof (struct in_addr)); | ||
383 | v4->sin_port = v6->sin6_port; | ||
384 | uaddr = v4; | ||
385 | addrlen = sizeof (struct sockaddr_in); | ||
386 | } | ||
387 | else | ||
388 | { | ||
389 | uaddr = GNUNET_malloc (addrlen); | ||
390 | GNUNET_memcpy (uaddr, addr, addrlen); | ||
391 | } | ||
392 | gcp = NULL; | ||
393 | if (AF_UNIX == sa->sa_family) | ||
394 | { | ||
395 | #if HAVE_GETPEEREID | ||
396 | /* most BSDs */ | ||
397 | if (0 == getpeereid (GNUNET_NETWORK_get_fd (sock), | ||
398 | &gc.uid, | ||
399 | &gc.gid)) | ||
400 | gcp = &gc; | ||
401 | #else | ||
402 | #ifdef SO_PEERCRED | ||
403 | /* largely traditional GNU/Linux */ | ||
404 | olen = sizeof (uc); | ||
405 | if ( (0 == | ||
406 | getsockopt (GNUNET_NETWORK_get_fd (sock), | ||
407 | SOL_SOCKET, | ||
408 | SO_PEERCRED, | ||
409 | &uc, | ||
410 | &olen)) && | ||
411 | (olen == sizeof (uc)) ) | ||
412 | { | ||
413 | gc.uid = uc.uid; | ||
414 | gc.gid = uc.gid; | ||
415 | gcp = &gc; | ||
416 | } | ||
417 | #else | ||
418 | #if HAVE_GETPEERUCRED | ||
419 | /* this is for Solaris 10 */ | ||
420 | ucred_t *uc; | ||
421 | |||
422 | uc = NULL; | ||
423 | if (0 == getpeerucred (GNUNET_NETWORK_get_fd (sock), &uc)) | ||
424 | { | ||
425 | gc.uid = ucred_geteuid (uc); | ||
426 | gc.gid = ucred_getegid (uc); | ||
427 | gcp = &gc; | ||
428 | } | ||
429 | ucred_free (uc); | ||
430 | #endif | ||
431 | #endif | ||
432 | #endif | ||
433 | } | ||
434 | |||
435 | if ( (NULL != access_cb) && | ||
436 | (GNUNET_YES != (aret = access_cb (access_cb_cls, | ||
437 | gcp, | ||
438 | uaddr, | ||
439 | addrlen))) ) | ||
440 | { | ||
441 | if (GNUNET_NO == aret) | ||
442 | LOG (GNUNET_ERROR_TYPE_INFO, | ||
443 | _("Access denied to `%s'\n"), | ||
444 | GNUNET_a2s (uaddr, | ||
445 | addrlen)); | ||
446 | GNUNET_break (GNUNET_OK == | ||
447 | GNUNET_NETWORK_socket_shutdown (sock, | ||
448 | SHUT_RDWR)); | ||
449 | GNUNET_break (GNUNET_OK == GNUNET_NETWORK_socket_close (sock)); | ||
450 | GNUNET_free (uaddr); | ||
451 | return NULL; | ||
452 | } | ||
453 | connection = GNUNET_new (struct GNUNET_CONNECTION_Handle); | ||
454 | connection->write_buffer_size = GNUNET_SERVER_MIN_BUFFER_SIZE; | ||
455 | connection->write_buffer = GNUNET_malloc (connection->write_buffer_size); | ||
456 | connection->addr = uaddr; | ||
457 | connection->addrlen = addrlen; | ||
458 | connection->sock = sock; | ||
459 | LOG (GNUNET_ERROR_TYPE_INFO, | ||
460 | _("Accepting connection from `%s': %p\n"), | ||
461 | GNUNET_a2s (uaddr, | ||
462 | addrlen), | ||
463 | connection); | ||
464 | return connection; | ||
465 | } | ||
466 | |||
467 | |||
468 | /** | ||
469 | * Obtain the network address of the other party. | ||
470 | * | ||
471 | * @param connection the client to get the address for | ||
472 | * @param addr where to store the address | ||
473 | * @param addrlen where to store the length of the @a addr | ||
474 | * @return #GNUNET_OK on success | ||
475 | */ | ||
476 | int | ||
477 | GNUNET_CONNECTION_get_address (struct GNUNET_CONNECTION_Handle *connection, | ||
478 | void **addr, | ||
479 | size_t *addrlen) | ||
480 | { | ||
481 | if ((NULL == connection->addr) || (0 == connection->addrlen)) | ||
482 | return GNUNET_NO; | ||
483 | *addr = GNUNET_malloc (connection->addrlen); | ||
484 | GNUNET_memcpy (*addr, connection->addr, connection->addrlen); | ||
485 | *addrlen = connection->addrlen; | ||
486 | return GNUNET_OK; | ||
487 | } | ||
488 | |||
489 | |||
490 | /** | ||
491 | * Tell the receiver callback that we had an IO error. | ||
492 | * | ||
493 | * @param connection connection to signal error | ||
494 | * @param errcode error code to send | ||
495 | */ | ||
496 | static void | ||
497 | signal_receive_error (struct GNUNET_CONNECTION_Handle *connection, | ||
498 | int errcode) | ||
499 | { | ||
500 | GNUNET_CONNECTION_Receiver receiver; | ||
501 | |||
502 | LOG (GNUNET_ERROR_TYPE_DEBUG, | ||
503 | "Receive encounters error (%s), connection closed (%p)\n", | ||
504 | STRERROR (errcode), | ||
505 | connection); | ||
506 | GNUNET_assert (NULL != (receiver = connection->receiver)); | ||
507 | connection->receiver = NULL; | ||
508 | receiver (connection->receiver_cls, | ||
509 | NULL, | ||
510 | 0, | ||
511 | connection->addr, | ||
512 | connection->addrlen, | ||
513 | errcode); | ||
514 | } | ||
515 | |||
516 | |||
517 | /** | ||
518 | * Tell the receiver callback that a timeout was reached. | ||
519 | * | ||
520 | * @param connection connection to signal for | ||
521 | */ | ||
522 | static void | ||
523 | signal_receive_timeout (struct GNUNET_CONNECTION_Handle *connection) | ||
524 | { | ||
525 | GNUNET_CONNECTION_Receiver receiver; | ||
526 | |||
527 | LOG (GNUNET_ERROR_TYPE_DEBUG, | ||
528 | "Connection signals timeout to receiver (%p)!\n", | ||
529 | connection); | ||
530 | GNUNET_assert (NULL != (receiver = connection->receiver)); | ||
531 | connection->receiver = NULL; | ||
532 | receiver (connection->receiver_cls, NULL, 0, NULL, 0, 0); | ||
533 | } | ||
534 | |||
535 | |||
536 | /** | ||
537 | * We failed to transmit data to the service, signal the error. | ||
538 | * | ||
539 | * @param connection handle that had trouble | ||
540 | * @param ecode error code (errno) | ||
541 | */ | ||
542 | static void | ||
543 | signal_transmit_error (struct GNUNET_CONNECTION_Handle *connection, | ||
544 | int ecode) | ||
545 | { | ||
546 | GNUNET_CONNECTION_TransmitReadyNotify notify; | ||
547 | |||
548 | LOG (GNUNET_ERROR_TYPE_DEBUG, | ||
549 | "Transmission encounterd error (%s), connection closed (%p)\n", | ||
550 | STRERROR (ecode), | ||
551 | connection); | ||
552 | if (NULL != connection->sock) | ||
553 | { | ||
554 | (void) GNUNET_NETWORK_socket_shutdown (connection->sock, | ||
555 | SHUT_RDWR); | ||
556 | GNUNET_break (GNUNET_OK == | ||
557 | GNUNET_NETWORK_socket_close (connection->sock)); | ||
558 | connection->sock = NULL; | ||
559 | GNUNET_assert (NULL == connection->write_task); | ||
560 | } | ||
561 | if (NULL != connection->read_task) | ||
562 | { | ||
563 | /* send errors trigger read errors... */ | ||
564 | GNUNET_SCHEDULER_cancel (connection->read_task); | ||
565 | connection->read_task = NULL; | ||
566 | signal_receive_timeout (connection); | ||
567 | return; | ||
568 | } | ||
569 | if (NULL == connection->nth.notify_ready) | ||
570 | return; /* nobody to tell about it */ | ||
571 | notify = connection->nth.notify_ready; | ||
572 | connection->nth.notify_ready = NULL; | ||
573 | notify (connection->nth.notify_ready_cls, | ||
574 | 0, | ||
575 | NULL); | ||
576 | } | ||
577 | |||
578 | |||
579 | /** | ||
580 | * We've failed for good to establish a connection (timeout or | ||
581 | * no more addresses to try). | ||
582 | * | ||
583 | * @param connection the connection we tried to establish | ||
584 | */ | ||
585 | static void | ||
586 | connect_fail_continuation (struct GNUNET_CONNECTION_Handle *connection) | ||
587 | { | ||
588 | LOG (GNUNET_ERROR_TYPE_INFO, | ||
589 | "Failed to establish TCP connection to `%s:%u', no further addresses to try.\n", | ||
590 | connection->hostname, | ||
591 | connection->port); | ||
592 | GNUNET_break (NULL == connection->ap_head); | ||
593 | GNUNET_break (NULL == connection->ap_tail); | ||
594 | GNUNET_break (GNUNET_NO == connection->dns_active); | ||
595 | GNUNET_break (NULL == connection->sock); | ||
596 | GNUNET_assert (NULL == connection->write_task); | ||
597 | GNUNET_assert (NULL == connection->proxy_handshake); | ||
598 | |||
599 | /* signal errors for jobs that used to wait on the connection */ | ||
600 | connection->destroy_later = 1; | ||
601 | if (NULL != connection->receiver) | ||
602 | signal_receive_error (connection, | ||
603 | ECONNREFUSED); | ||
604 | if (NULL != connection->nth.notify_ready) | ||
605 | { | ||
606 | GNUNET_assert (NULL != connection->nth.timeout_task); | ||
607 | GNUNET_SCHEDULER_cancel (connection->nth.timeout_task); | ||
608 | connection->nth.timeout_task = NULL; | ||
609 | signal_transmit_error (connection, | ||
610 | ECONNREFUSED); | ||
611 | } | ||
612 | if (-1 == connection->destroy_later) | ||
613 | { | ||
614 | /* do it now */ | ||
615 | connection->destroy_later = 0; | ||
616 | GNUNET_CONNECTION_destroy (connection); | ||
617 | return; | ||
618 | } | ||
619 | connection->destroy_later = 0; | ||
620 | } | ||
621 | |||
622 | |||
623 | /** | ||
624 | * We are ready to transmit (or got a timeout). | ||
625 | * | ||
626 | * @param cls our connection handle | ||
627 | */ | ||
628 | static void | ||
629 | transmit_ready (void *cls); | ||
630 | |||
631 | |||
632 | /** | ||
633 | * This function is called once we either timeout or have data ready | ||
634 | * to read. | ||
635 | * | ||
636 | * @param cls connection to read from | ||
637 | */ | ||
638 | static void | ||
639 | receive_ready (void *cls); | ||
640 | |||
641 | |||
642 | /** | ||
643 | * We've succeeded in establishing a connection. | ||
644 | * | ||
645 | * @param connection the connection we tried to establish | ||
646 | */ | ||
647 | static void | ||
648 | connect_success_continuation (struct GNUNET_CONNECTION_Handle *connection) | ||
649 | { | ||
650 | LOG (GNUNET_ERROR_TYPE_DEBUG, | ||
651 | "Connection to `%s' succeeded! (%p)\n", | ||
652 | GNUNET_a2s (connection->addr, | ||
653 | connection->addrlen), | ||
654 | connection); | ||
655 | /* trigger jobs that waited for the connection */ | ||
656 | if (NULL != connection->receiver) | ||
657 | { | ||
658 | LOG (GNUNET_ERROR_TYPE_DEBUG, | ||
659 | "Connection succeeded, starting with receiving data (%p)\n", | ||
660 | connection); | ||
661 | GNUNET_assert (NULL == connection->read_task); | ||
662 | connection->read_task = | ||
663 | GNUNET_SCHEDULER_add_read_net (GNUNET_TIME_absolute_get_remaining | ||
664 | (connection->receive_timeout), | ||
665 | connection->sock, | ||
666 | &receive_ready, connection); | ||
667 | } | ||
668 | if (NULL != connection->nth.notify_ready) | ||
669 | { | ||
670 | LOG (GNUNET_ERROR_TYPE_DEBUG, | ||
671 | "Connection succeeded, starting with sending data (%p)\n", | ||
672 | connection); | ||
673 | GNUNET_assert (connection->nth.timeout_task != NULL); | ||
674 | GNUNET_SCHEDULER_cancel (connection->nth.timeout_task); | ||
675 | connection->nth.timeout_task = NULL; | ||
676 | GNUNET_assert (connection->write_task == NULL); | ||
677 | connection->write_task = | ||
678 | GNUNET_SCHEDULER_add_write_net (GNUNET_TIME_absolute_get_remaining | ||
679 | (connection->nth.transmit_timeout), connection->sock, | ||
680 | &transmit_ready, connection); | ||
681 | } | ||
682 | } | ||
683 | |||
684 | |||
685 | /** | ||
686 | * Scheduler let us know that we're either ready to write on the | ||
687 | * socket OR connect timed out. Do the right thing. | ||
688 | * | ||
689 | * @param cls the `struct AddressProbe *` with the address that we are probing | ||
690 | */ | ||
691 | static void | ||
692 | connect_probe_continuation (void *cls) | ||
693 | { | ||
694 | struct AddressProbe *ap = cls; | ||
695 | struct GNUNET_CONNECTION_Handle *connection = ap->connection; | ||
696 | const struct GNUNET_SCHEDULER_TaskContext *tc; | ||
697 | struct AddressProbe *pos; | ||
698 | int error; | ||
699 | socklen_t len; | ||
700 | |||
701 | GNUNET_assert (NULL != ap->sock); | ||
702 | GNUNET_CONTAINER_DLL_remove (connection->ap_head, | ||
703 | connection->ap_tail, | ||
704 | ap); | ||
705 | len = sizeof (error); | ||
706 | errno = 0; | ||
707 | error = 0; | ||
708 | tc = GNUNET_SCHEDULER_get_task_context (); | ||
709 | if ( (0 == (tc->reason & GNUNET_SCHEDULER_REASON_WRITE_READY)) || | ||
710 | (GNUNET_OK != | ||
711 | GNUNET_NETWORK_socket_getsockopt (ap->sock, | ||
712 | SOL_SOCKET, | ||
713 | SO_ERROR, | ||
714 | &error, | ||
715 | &len)) || | ||
716 | (0 != error) ) | ||
717 | { | ||
718 | GNUNET_break (GNUNET_OK == | ||
719 | GNUNET_NETWORK_socket_close (ap->sock)); | ||
720 | GNUNET_free (ap); | ||
721 | if ( (NULL == connection->ap_head) && | ||
722 | (GNUNET_NO == connection->dns_active) && | ||
723 | (NULL == connection->proxy_handshake) ) | ||
724 | connect_fail_continuation (connection); | ||
725 | return; | ||
726 | } | ||
727 | GNUNET_assert (NULL == connection->sock); | ||
728 | connection->sock = ap->sock; | ||
729 | GNUNET_assert (NULL == connection->addr); | ||
730 | connection->addr = GNUNET_malloc (ap->addrlen); | ||
731 | GNUNET_memcpy (connection->addr, ap->addr, ap->addrlen); | ||
732 | connection->addrlen = ap->addrlen; | ||
733 | GNUNET_free (ap); | ||
734 | /* cancel all other attempts */ | ||
735 | while (NULL != (pos = connection->ap_head)) | ||
736 | { | ||
737 | GNUNET_break (GNUNET_OK == GNUNET_NETWORK_socket_close (pos->sock)); | ||
738 | GNUNET_SCHEDULER_cancel (pos->task); | ||
739 | GNUNET_CONTAINER_DLL_remove (connection->ap_head, | ||
740 | connection->ap_tail, | ||
741 | pos); | ||
742 | GNUNET_free (pos); | ||
743 | } | ||
744 | connect_success_continuation (connection); | ||
745 | } | ||
746 | |||
747 | |||
748 | /** | ||
749 | * Try to establish a connection given the specified address. | ||
750 | * This function is called by the resolver once we have a DNS reply. | ||
751 | * | ||
752 | * @param cls our `struct GNUNET_CONNECTION_Handle *` | ||
753 | * @param addr address to try, NULL for "last call" | ||
754 | * @param addrlen length of @a addr | ||
755 | */ | ||
756 | static void | ||
757 | try_connect_using_address (void *cls, | ||
758 | const struct sockaddr *addr, | ||
759 | socklen_t addrlen) | ||
760 | { | ||
761 | struct GNUNET_CONNECTION_Handle *connection = cls; | ||
762 | struct AddressProbe *ap; | ||
763 | struct GNUNET_TIME_Relative delay; | ||
764 | |||
765 | if (NULL == addr) | ||
766 | { | ||
767 | connection->dns_active = NULL; | ||
768 | if ((NULL == connection->ap_head) && | ||
769 | (NULL == connection->sock) && | ||
770 | (NULL == connection->proxy_handshake)) | ||
771 | connect_fail_continuation (connection); | ||
772 | return; | ||
773 | } | ||
774 | if (NULL != connection->sock) | ||
775 | return; /* already connected */ | ||
776 | GNUNET_assert (NULL == connection->addr); | ||
777 | /* try to connect */ | ||
778 | LOG (GNUNET_ERROR_TYPE_DEBUG, | ||
779 | "Trying to connect using address `%s:%u/%s:%u'\n", | ||
780 | connection->hostname, | ||
781 | connection->port, | ||
782 | GNUNET_a2s (addr, addrlen), | ||
783 | connection->port); | ||
784 | ap = GNUNET_malloc (sizeof (struct AddressProbe) + addrlen); | ||
785 | ap->addr = (const struct sockaddr *) &ap[1]; | ||
786 | GNUNET_memcpy (&ap[1], addr, addrlen); | ||
787 | ap->addrlen = addrlen; | ||
788 | ap->connection = connection; | ||
789 | |||
790 | switch (ap->addr->sa_family) | ||
791 | { | ||
792 | case AF_INET: | ||
793 | ((struct sockaddr_in *) ap->addr)->sin_port = htons (connection->port); | ||
794 | break; | ||
795 | case AF_INET6: | ||
796 | ((struct sockaddr_in6 *) ap->addr)->sin6_port = htons (connection->port); | ||
797 | break; | ||
798 | default: | ||
799 | GNUNET_break (0); | ||
800 | GNUNET_free (ap); | ||
801 | return; /* not supported by us */ | ||
802 | } | ||
803 | ap->sock = GNUNET_NETWORK_socket_create (ap->addr->sa_family, | ||
804 | SOCK_STREAM, 0); | ||
805 | if (NULL == ap->sock) | ||
806 | { | ||
807 | GNUNET_free (ap); | ||
808 | return; /* not supported by OS */ | ||
809 | } | ||
810 | LOG (GNUNET_ERROR_TYPE_INFO, | ||
811 | "Trying to connect to `%s' (%p)\n", | ||
812 | GNUNET_a2s (ap->addr, ap->addrlen), | ||
813 | connection); | ||
814 | if ((GNUNET_OK != | ||
815 | GNUNET_NETWORK_socket_connect (ap->sock, | ||
816 | ap->addr, | ||
817 | ap->addrlen)) && | ||
818 | (EINPROGRESS != errno)) | ||
819 | { | ||
820 | /* maybe refused / unsupported address, try next */ | ||
821 | LOG_STRERROR (GNUNET_ERROR_TYPE_INFO, "connect"); | ||
822 | GNUNET_break (GNUNET_OK == GNUNET_NETWORK_socket_close (ap->sock)); | ||
823 | GNUNET_free (ap); | ||
824 | return; | ||
825 | } | ||
826 | GNUNET_CONTAINER_DLL_insert (connection->ap_head, connection->ap_tail, ap); | ||
827 | delay = GNUNET_CONNECTION_CONNECT_RETRY_TIMEOUT; | ||
828 | if (NULL != connection->nth.notify_ready) | ||
829 | delay = GNUNET_TIME_relative_min (delay, | ||
830 | GNUNET_TIME_absolute_get_remaining (connection->nth.transmit_timeout)); | ||
831 | if (NULL != connection->receiver) | ||
832 | delay = GNUNET_TIME_relative_min (delay, | ||
833 | GNUNET_TIME_absolute_get_remaining (connection->receive_timeout)); | ||
834 | ap->task = GNUNET_SCHEDULER_add_write_net (delay, | ||
835 | ap->sock, | ||
836 | &connect_probe_continuation, | ||
837 | ap); | ||
838 | } | ||
839 | |||
840 | |||
841 | /** | ||
842 | * Create a connection handle by (asynchronously) connecting to a host. | ||
843 | * This function returns immediately, even if the connection has not | ||
844 | * yet been established. This function only creates TCP connections. | ||
845 | * | ||
846 | * @param cfg configuration to use | ||
847 | * @param hostname name of the host to connect to | ||
848 | * @param port port to connect to | ||
849 | * @return the connection handle | ||
850 | */ | ||
851 | struct GNUNET_CONNECTION_Handle * | ||
852 | GNUNET_CONNECTION_create_from_connect (const struct GNUNET_CONFIGURATION_Handle *cfg, | ||
853 | const char *hostname, | ||
854 | uint16_t port) | ||
855 | { | ||
856 | struct GNUNET_CONNECTION_Handle *connection; | ||
857 | |||
858 | GNUNET_assert (0 < strlen (hostname)); /* sanity check */ | ||
859 | connection = GNUNET_new (struct GNUNET_CONNECTION_Handle); | ||
860 | connection->cfg = cfg; | ||
861 | connection->write_buffer_size = GNUNET_SERVER_MIN_BUFFER_SIZE; | ||
862 | connection->write_buffer = GNUNET_malloc (connection->write_buffer_size); | ||
863 | connection->port = port; | ||
864 | connection->hostname = GNUNET_strdup (hostname); | ||
865 | connection->dns_active = | ||
866 | GNUNET_RESOLVER_ip_get (connection->hostname, | ||
867 | AF_UNSPEC, | ||
868 | GNUNET_CONNECTION_CONNECT_RETRY_TIMEOUT, | ||
869 | &try_connect_using_address, | ||
870 | connection); | ||
871 | return connection; | ||
872 | } | ||
873 | |||
874 | |||
875 | /** | ||
876 | * Create a connection handle by connecting to a UNIX domain service. | ||
877 | * This function returns immediately, even if the connection has not | ||
878 | * yet been established. This function only creates UNIX connections. | ||
879 | * | ||
880 | * @param cfg configuration to use | ||
881 | * @param unixpath path to connect to | ||
882 | * @return the connection handle, NULL on systems without UNIX support | ||
883 | */ | ||
884 | struct GNUNET_CONNECTION_Handle * | ||
885 | GNUNET_CONNECTION_create_from_connect_to_unixpath (const struct GNUNET_CONFIGURATION_Handle *cfg, | ||
886 | const char *unixpath) | ||
887 | { | ||
888 | #ifdef AF_UNIX | ||
889 | struct GNUNET_CONNECTION_Handle *connection; | ||
890 | struct sockaddr_un *un; | ||
891 | |||
892 | GNUNET_assert (0 < strlen (unixpath)); /* sanity check */ | ||
893 | un = GNUNET_new (struct sockaddr_un); | ||
894 | un->sun_family = AF_UNIX; | ||
895 | strncpy (un->sun_path, unixpath, sizeof (un->sun_path) - 1); | ||
896 | #ifdef LINUX | ||
897 | { | ||
898 | int abstract; | ||
899 | |||
900 | abstract = GNUNET_CONFIGURATION_get_value_yesno (cfg, | ||
901 | "TESTING", | ||
902 | "USE_ABSTRACT_SOCKETS"); | ||
903 | if (GNUNET_YES == abstract) | ||
904 | un->sun_path[0] = '\0'; | ||
905 | } | ||
906 | #endif | ||
907 | #if HAVE_SOCKADDR_UN_SUN_LEN | ||
908 | un->sun_len = (u_char) sizeof (struct sockaddr_un); | ||
909 | #endif | ||
910 | connection = GNUNET_new (struct GNUNET_CONNECTION_Handle); | ||
911 | connection->cfg = cfg; | ||
912 | connection->write_buffer_size = GNUNET_SERVER_MIN_BUFFER_SIZE; | ||
913 | connection->write_buffer = GNUNET_malloc (connection->write_buffer_size); | ||
914 | connection->port = 0; | ||
915 | connection->hostname = NULL; | ||
916 | connection->addr = (struct sockaddr *) un; | ||
917 | connection->addrlen = sizeof (struct sockaddr_un); | ||
918 | connection->sock = GNUNET_NETWORK_socket_create (AF_UNIX, | ||
919 | SOCK_STREAM, | ||
920 | 0); | ||
921 | if (NULL == connection->sock) | ||
922 | { | ||
923 | GNUNET_free (connection->addr); | ||
924 | GNUNET_free (connection->write_buffer); | ||
925 | GNUNET_free (connection); | ||
926 | return NULL; | ||
927 | } | ||
928 | if ( (GNUNET_OK != | ||
929 | GNUNET_NETWORK_socket_connect (connection->sock, | ||
930 | connection->addr, | ||
931 | connection->addrlen)) && | ||
932 | (EINPROGRESS != errno) ) | ||
933 | { | ||
934 | /* Just return; we expect everything to work eventually so don't fail HARD */ | ||
935 | GNUNET_break (GNUNET_OK == | ||
936 | GNUNET_NETWORK_socket_close (connection->sock)); | ||
937 | connection->sock = NULL; | ||
938 | return connection; | ||
939 | } | ||
940 | connect_success_continuation (connection); | ||
941 | return connection; | ||
942 | #else | ||
943 | return NULL; | ||
944 | #endif | ||
945 | } | ||
946 | |||
947 | |||
948 | /** | ||
949 | * Create a connection handle by (asynchronously) connecting to a host. | ||
950 | * This function returns immediately, even if the connection has not | ||
951 | * yet been established. This function only creates TCP connections. | ||
952 | * | ||
953 | * @param s socket to connect | ||
954 | * @param serv_addr server address | ||
955 | * @param addrlen length of @a serv_addr | ||
956 | * @return the connection handle | ||
957 | */ | ||
958 | struct GNUNET_CONNECTION_Handle * | ||
959 | GNUNET_CONNECTION_connect_socket (struct GNUNET_NETWORK_Handle *s, | ||
960 | const struct sockaddr *serv_addr, | ||
961 | socklen_t addrlen) | ||
962 | { | ||
963 | struct GNUNET_CONNECTION_Handle *connection; | ||
964 | |||
965 | if ( (GNUNET_OK != | ||
966 | GNUNET_NETWORK_socket_connect (s, serv_addr, addrlen)) && | ||
967 | (EINPROGRESS != errno) ) | ||
968 | { | ||
969 | /* maybe refused / unsupported address, try next */ | ||
970 | LOG_STRERROR (GNUNET_ERROR_TYPE_DEBUG, | ||
971 | "connect"); | ||
972 | LOG (GNUNET_ERROR_TYPE_DEBUG, | ||
973 | "Attempt to connect to `%s' failed\n", | ||
974 | GNUNET_a2s (serv_addr, | ||
975 | addrlen)); | ||
976 | GNUNET_break (GNUNET_OK == GNUNET_NETWORK_socket_close (s)); | ||
977 | return NULL; | ||
978 | } | ||
979 | connection = GNUNET_CONNECTION_create_from_existing (s); | ||
980 | connection->addr = GNUNET_malloc (addrlen); | ||
981 | GNUNET_memcpy (connection->addr, serv_addr, addrlen); | ||
982 | connection->addrlen = addrlen; | ||
983 | LOG (GNUNET_ERROR_TYPE_INFO, | ||
984 | "Trying to connect to `%s' (%p)\n", | ||
985 | GNUNET_a2s (serv_addr, addrlen), | ||
986 | connection); | ||
987 | return connection; | ||
988 | } | ||
989 | |||
990 | |||
991 | /** | ||
992 | * Create a connection handle by creating a socket and | ||
993 | * (asynchronously) connecting to a host. This function returns | ||
994 | * immediately, even if the connection has not yet been established. | ||
995 | * This function only creates TCP connections. | ||
996 | * | ||
997 | * @param af_family address family to use | ||
998 | * @param serv_addr server address | ||
999 | * @param addrlen length of @a serv_addr | ||
1000 | * @return the connection handle | ||
1001 | */ | ||
1002 | struct GNUNET_CONNECTION_Handle * | ||
1003 | GNUNET_CONNECTION_create_from_sockaddr (int af_family, | ||
1004 | const struct sockaddr *serv_addr, | ||
1005 | socklen_t addrlen) | ||
1006 | { | ||
1007 | struct GNUNET_NETWORK_Handle *s; | ||
1008 | |||
1009 | s = GNUNET_NETWORK_socket_create (af_family, SOCK_STREAM, 0); | ||
1010 | if (NULL == s) | ||
1011 | { | ||
1012 | LOG_STRERROR (GNUNET_ERROR_TYPE_WARNING | GNUNET_ERROR_TYPE_BULK, | ||
1013 | "socket"); | ||
1014 | return NULL; | ||
1015 | } | ||
1016 | return GNUNET_CONNECTION_connect_socket (s, | ||
1017 | serv_addr, | ||
1018 | addrlen); | ||
1019 | } | ||
1020 | |||
1021 | |||
1022 | /** | ||
1023 | * Check if connection is valid (no fatal errors have happened so far). | ||
1024 | * Note that a connection that is still trying to connect is considered | ||
1025 | * valid. | ||
1026 | * | ||
1027 | * @param connection connection to check | ||
1028 | * @return #GNUNET_YES if valid, #GNUNET_NO otherwise | ||
1029 | */ | ||
1030 | int | ||
1031 | GNUNET_CONNECTION_check (struct GNUNET_CONNECTION_Handle *connection) | ||
1032 | { | ||
1033 | if ((NULL != connection->ap_head) || | ||
1034 | (NULL != connection->dns_active) || | ||
1035 | (NULL != connection->proxy_handshake)) | ||
1036 | return GNUNET_YES; /* still trying to connect */ | ||
1037 | if ( (0 != connection->destroy_later) || | ||
1038 | (NULL == connection->sock) ) | ||
1039 | return GNUNET_NO; | ||
1040 | return GNUNET_YES; | ||
1041 | } | ||
1042 | |||
1043 | |||
1044 | /** | ||
1045 | * Close the connection and free associated resources. There must | ||
1046 | * not be any pending requests for reading or writing to the | ||
1047 | * connection at this time. | ||
1048 | * | ||
1049 | * @param connection connection to destroy | ||
1050 | */ | ||
1051 | void | ||
1052 | GNUNET_CONNECTION_destroy (struct GNUNET_CONNECTION_Handle *connection) | ||
1053 | { | ||
1054 | struct AddressProbe *pos; | ||
1055 | |||
1056 | if (0 != connection->destroy_later) | ||
1057 | { | ||
1058 | connection->destroy_later = -1; | ||
1059 | return; | ||
1060 | } | ||
1061 | LOG (GNUNET_ERROR_TYPE_DEBUG, | ||
1062 | "Shutting down connection (%p)\n", | ||
1063 | connection); | ||
1064 | GNUNET_assert (NULL == connection->nth.notify_ready); | ||
1065 | GNUNET_assert (NULL == connection->receiver); | ||
1066 | if (NULL != connection->write_task) | ||
1067 | { | ||
1068 | GNUNET_SCHEDULER_cancel (connection->write_task); | ||
1069 | connection->write_task = NULL; | ||
1070 | connection->write_buffer_off = 0; | ||
1071 | } | ||
1072 | if (NULL != connection->read_task) | ||
1073 | { | ||
1074 | GNUNET_SCHEDULER_cancel (connection->read_task); | ||
1075 | connection->read_task = NULL; | ||
1076 | } | ||
1077 | if (NULL != connection->nth.timeout_task) | ||
1078 | { | ||
1079 | GNUNET_SCHEDULER_cancel (connection->nth.timeout_task); | ||
1080 | connection->nth.timeout_task = NULL; | ||
1081 | } | ||
1082 | connection->nth.notify_ready = NULL; | ||
1083 | if (NULL != connection->dns_active) | ||
1084 | { | ||
1085 | GNUNET_RESOLVER_request_cancel (connection->dns_active); | ||
1086 | connection->dns_active = NULL; | ||
1087 | } | ||
1088 | if (NULL != connection->proxy_handshake) | ||
1089 | { | ||
1090 | /* GNUNET_CONNECTION_destroy (connection->proxy_handshake); */ | ||
1091 | connection->proxy_handshake->destroy_later = -1; | ||
1092 | connection->proxy_handshake = NULL; /* Not leaked ??? */ | ||
1093 | } | ||
1094 | while (NULL != (pos = connection->ap_head)) | ||
1095 | { | ||
1096 | GNUNET_break (GNUNET_OK == GNUNET_NETWORK_socket_close (pos->sock)); | ||
1097 | GNUNET_SCHEDULER_cancel (pos->task); | ||
1098 | GNUNET_CONTAINER_DLL_remove (connection->ap_head, | ||
1099 | connection->ap_tail, | ||
1100 | pos); | ||
1101 | GNUNET_free (pos); | ||
1102 | } | ||
1103 | if ( (NULL != connection->sock) && | ||
1104 | (GNUNET_YES != connection->persist) ) | ||
1105 | { | ||
1106 | if ((GNUNET_OK != | ||
1107 | GNUNET_NETWORK_socket_shutdown (connection->sock, | ||
1108 | SHUT_RDWR)) && | ||
1109 | (ENOTCONN != errno) && | ||
1110 | (ECONNRESET != errno) ) | ||
1111 | LOG_STRERROR (GNUNET_ERROR_TYPE_WARNING, | ||
1112 | "shutdown"); | ||
1113 | } | ||
1114 | if (NULL != connection->sock) | ||
1115 | { | ||
1116 | if (GNUNET_YES != connection->persist) | ||
1117 | { | ||
1118 | GNUNET_break (GNUNET_OK == | ||
1119 | GNUNET_NETWORK_socket_close (connection->sock)); | ||
1120 | } | ||
1121 | else | ||
1122 | { | ||
1123 | GNUNET_NETWORK_socket_free_memory_only_ (connection->sock); /* at least no memory leak (we deliberately | ||
1124 | * leak the socket in this special case) ... */ | ||
1125 | } | ||
1126 | } | ||
1127 | GNUNET_free_non_null (connection->addr); | ||
1128 | GNUNET_free_non_null (connection->hostname); | ||
1129 | GNUNET_free (connection->write_buffer); | ||
1130 | GNUNET_free (connection); | ||
1131 | } | ||
1132 | |||
1133 | |||
1134 | /** | ||
1135 | * This function is called once we either timeout | ||
1136 | * or have data ready to read. | ||
1137 | * | ||
1138 | * @param cls connection to read from | ||
1139 | */ | ||
1140 | static void | ||
1141 | receive_ready (void *cls) | ||
1142 | { | ||
1143 | struct GNUNET_CONNECTION_Handle *connection = cls; | ||
1144 | const struct GNUNET_SCHEDULER_TaskContext *tc; | ||
1145 | char buffer[connection->max]; | ||
1146 | ssize_t ret; | ||
1147 | GNUNET_CONNECTION_Receiver receiver; | ||
1148 | |||
1149 | connection->read_task = NULL; | ||
1150 | tc = GNUNET_SCHEDULER_get_task_context (); | ||
1151 | if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_TIMEOUT)) | ||
1152 | { | ||
1153 | LOG (GNUNET_ERROR_TYPE_DEBUG, | ||
1154 | "Receive from `%s' encounters error: timeout (%s, %p)\n", | ||
1155 | GNUNET_a2s (connection->addr, | ||
1156 | connection->addrlen), | ||
1157 | GNUNET_STRINGS_relative_time_to_string (GNUNET_TIME_absolute_get_duration (connection->receive_timeout), | ||
1158 | GNUNET_YES), | ||
1159 | connection); | ||
1160 | signal_receive_timeout (connection); | ||
1161 | return; | ||
1162 | } | ||
1163 | if (NULL == connection->sock) | ||
1164 | { | ||
1165 | /* connect failed for good */ | ||
1166 | signal_receive_error (connection, ECONNREFUSED); | ||
1167 | return; | ||
1168 | } | ||
1169 | GNUNET_assert (GNUNET_NETWORK_fdset_isset (tc->read_ready, | ||
1170 | connection->sock)); | ||
1171 | RETRY: | ||
1172 | ret = GNUNET_NETWORK_socket_recv (connection->sock, | ||
1173 | buffer, | ||
1174 | connection->max); | ||
1175 | if (-1 == ret) | ||
1176 | { | ||
1177 | if (EINTR == errno) | ||
1178 | goto RETRY; | ||
1179 | signal_receive_error (connection, errno); | ||
1180 | return; | ||
1181 | } | ||
1182 | LOG (GNUNET_ERROR_TYPE_DEBUG, | ||
1183 | "receive_ready read %u/%u bytes from `%s' (%p)!\n", | ||
1184 | (unsigned int) ret, | ||
1185 | connection->max, | ||
1186 | GNUNET_a2s (connection->addr, | ||
1187 | connection->addrlen), | ||
1188 | connection); | ||
1189 | GNUNET_assert (NULL != (receiver = connection->receiver)); | ||
1190 | connection->receiver = NULL; | ||
1191 | receiver (connection->receiver_cls, | ||
1192 | buffer, | ||
1193 | ret, | ||
1194 | connection->addr, | ||
1195 | connection->addrlen, | ||
1196 | 0); | ||
1197 | } | ||
1198 | |||
1199 | |||
1200 | /** | ||
1201 | * Receive data from the given connection. Note that this function | ||
1202 | * will call @a receiver asynchronously using the scheduler. It will | ||
1203 | * "immediately" return. Note that there MUST only be one active | ||
1204 | * receive call per connection at any given point in time (so do not | ||
1205 | * call receive again until the receiver callback has been invoked). | ||
1206 | * | ||
1207 | * @param connection connection handle | ||
1208 | * @param max maximum number of bytes to read | ||
1209 | * @param timeout maximum amount of time to wait | ||
1210 | * @param receiver function to call with received data | ||
1211 | * @param receiver_cls closure for @a receiver | ||
1212 | */ | ||
1213 | void | ||
1214 | GNUNET_CONNECTION_receive (struct GNUNET_CONNECTION_Handle *connection, | ||
1215 | size_t max, | ||
1216 | struct GNUNET_TIME_Relative timeout, | ||
1217 | GNUNET_CONNECTION_Receiver receiver, | ||
1218 | void *receiver_cls) | ||
1219 | { | ||
1220 | GNUNET_assert ((NULL == connection->read_task) && | ||
1221 | (NULL == connection->receiver)); | ||
1222 | GNUNET_assert (NULL != receiver); | ||
1223 | connection->receiver = receiver; | ||
1224 | connection->receiver_cls = receiver_cls; | ||
1225 | connection->receive_timeout = GNUNET_TIME_relative_to_absolute (timeout); | ||
1226 | connection->max = max; | ||
1227 | if (NULL != connection->sock) | ||
1228 | { | ||
1229 | connection->read_task = | ||
1230 | GNUNET_SCHEDULER_add_read_net (GNUNET_TIME_absolute_get_remaining | ||
1231 | (connection->receive_timeout), | ||
1232 | connection->sock, | ||
1233 | &receive_ready, | ||
1234 | connection); | ||
1235 | return; | ||
1236 | } | ||
1237 | if ((NULL == connection->dns_active) && | ||
1238 | (NULL == connection->ap_head) && | ||
1239 | (NULL == connection->proxy_handshake)) | ||
1240 | { | ||
1241 | connection->receiver = NULL; | ||
1242 | receiver (receiver_cls, | ||
1243 | NULL, 0, | ||
1244 | NULL, 0, | ||
1245 | ETIMEDOUT); | ||
1246 | return; | ||
1247 | } | ||
1248 | } | ||
1249 | |||
1250 | |||
1251 | /** | ||
1252 | * Cancel receive job on the given connection. Note that the | ||
1253 | * receiver callback must not have been called yet in order | ||
1254 | * for the cancellation to be valid. | ||
1255 | * | ||
1256 | * @param connection connection handle | ||
1257 | * @return closure of the original receiver callback closure | ||
1258 | */ | ||
1259 | void * | ||
1260 | GNUNET_CONNECTION_receive_cancel (struct GNUNET_CONNECTION_Handle *connection) | ||
1261 | { | ||
1262 | if (NULL != connection->read_task) | ||
1263 | { | ||
1264 | GNUNET_assert (connection == | ||
1265 | GNUNET_SCHEDULER_cancel (connection->read_task)); | ||
1266 | connection->read_task = NULL; | ||
1267 | } | ||
1268 | connection->receiver = NULL; | ||
1269 | return connection->receiver_cls; | ||
1270 | } | ||
1271 | |||
1272 | |||
1273 | /** | ||
1274 | * Try to call the transmit notify method (check if we do | ||
1275 | * have enough space available first)! | ||
1276 | * | ||
1277 | * @param connection connection for which we should do this processing | ||
1278 | * @return #GNUNET_YES if we were able to call notify | ||
1279 | */ | ||
1280 | static int | ||
1281 | process_notify (struct GNUNET_CONNECTION_Handle *connection) | ||
1282 | { | ||
1283 | size_t used; | ||
1284 | size_t avail; | ||
1285 | size_t size; | ||
1286 | GNUNET_CONNECTION_TransmitReadyNotify notify; | ||
1287 | |||
1288 | LOG (GNUNET_ERROR_TYPE_DEBUG, | ||
1289 | "process_notify is running\n"); | ||
1290 | GNUNET_assert (NULL == connection->write_task); | ||
1291 | if (NULL == (notify = connection->nth.notify_ready)) | ||
1292 | { | ||
1293 | LOG (GNUNET_ERROR_TYPE_DEBUG, | ||
1294 | "No one to notify\n"); | ||
1295 | return GNUNET_NO; | ||
1296 | } | ||
1297 | used = connection->write_buffer_off - connection->write_buffer_pos; | ||
1298 | avail = connection->write_buffer_size - used; | ||
1299 | size = connection->nth.notify_size; | ||
1300 | if (size > avail) | ||
1301 | { | ||
1302 | LOG (GNUNET_ERROR_TYPE_DEBUG, | ||
1303 | "Not enough buffer\n"); | ||
1304 | return GNUNET_NO; | ||
1305 | } | ||
1306 | connection->nth.notify_ready = NULL; | ||
1307 | if (connection->write_buffer_size - connection->write_buffer_off < size) | ||
1308 | { | ||
1309 | /* need to compact */ | ||
1310 | memmove (connection->write_buffer, | ||
1311 | &connection->write_buffer[connection->write_buffer_pos], | ||
1312 | used); | ||
1313 | connection->write_buffer_off -= connection->write_buffer_pos; | ||
1314 | connection->write_buffer_pos = 0; | ||
1315 | } | ||
1316 | avail = connection->write_buffer_size - connection->write_buffer_off; | ||
1317 | GNUNET_assert (avail >= size); | ||
1318 | size = | ||
1319 | notify (connection->nth.notify_ready_cls, avail, | ||
1320 | &connection->write_buffer[connection->write_buffer_off]); | ||
1321 | GNUNET_assert (size <= avail); | ||
1322 | if (0 != size) | ||
1323 | connection->write_buffer_off += size; | ||
1324 | return GNUNET_YES; | ||
1325 | } | ||
1326 | |||
1327 | |||
1328 | /** | ||
1329 | * Task invoked by the scheduler when a call to transmit | ||
1330 | * is timing out (we never got enough buffer space to call | ||
1331 | * the callback function before the specified timeout | ||
1332 | * expired). | ||
1333 | * | ||
1334 | * This task notifies the client about the timeout. | ||
1335 | * | ||
1336 | * @param cls the `struct GNUNET_CONNECTION_Handle` | ||
1337 | */ | ||
1338 | static void | ||
1339 | transmit_timeout (void *cls) | ||
1340 | { | ||
1341 | struct GNUNET_CONNECTION_Handle *connection = cls; | ||
1342 | GNUNET_CONNECTION_TransmitReadyNotify notify; | ||
1343 | |||
1344 | connection->nth.timeout_task = NULL; | ||
1345 | LOG (GNUNET_ERROR_TYPE_DEBUG, | ||
1346 | "Transmit to `%s:%u/%s' fails, time out reached (%p).\n", | ||
1347 | connection->hostname, | ||
1348 | connection->port, | ||
1349 | GNUNET_a2s (connection->addr, | ||
1350 | connection->addrlen), | ||
1351 | connection); | ||
1352 | notify = connection->nth.notify_ready; | ||
1353 | GNUNET_assert (NULL != notify); | ||
1354 | connection->nth.notify_ready = NULL; | ||
1355 | notify (connection->nth.notify_ready_cls, | ||
1356 | 0, | ||
1357 | NULL); | ||
1358 | } | ||
1359 | |||
1360 | |||
1361 | /** | ||
1362 | * Task invoked by the scheduler when we failed to connect | ||
1363 | * at the time of being asked to transmit. | ||
1364 | * | ||
1365 | * This task notifies the client about the error. | ||
1366 | * | ||
1367 | * @param cls the `struct GNUNET_CONNECTION_Handle` | ||
1368 | */ | ||
1369 | static void | ||
1370 | connect_error (void *cls) | ||
1371 | { | ||
1372 | struct GNUNET_CONNECTION_Handle *connection = cls; | ||
1373 | GNUNET_CONNECTION_TransmitReadyNotify notify; | ||
1374 | |||
1375 | LOG (GNUNET_ERROR_TYPE_DEBUG, | ||
1376 | "Transmission request of size %u fails (%s/%u), connection failed (%p).\n", | ||
1377 | connection->nth.notify_size, | ||
1378 | connection->hostname, | ||
1379 | connection->port, | ||
1380 | connection); | ||
1381 | connection->write_task = NULL; | ||
1382 | notify = connection->nth.notify_ready; | ||
1383 | connection->nth.notify_ready = NULL; | ||
1384 | notify (connection->nth.notify_ready_cls, | ||
1385 | 0, | ||
1386 | NULL); | ||
1387 | } | ||
1388 | |||
1389 | |||
1390 | /** | ||
1391 | * We are ready to transmit (or got a timeout). | ||
1392 | * | ||
1393 | * @param cls our connection handle | ||
1394 | */ | ||
1395 | static void | ||
1396 | transmit_ready (void *cls) | ||
1397 | { | ||
1398 | struct GNUNET_CONNECTION_Handle *connection = cls; | ||
1399 | GNUNET_CONNECTION_TransmitReadyNotify notify; | ||
1400 | const struct GNUNET_SCHEDULER_TaskContext *tc; | ||
1401 | ssize_t ret; | ||
1402 | size_t have; | ||
1403 | |||
1404 | LOG (GNUNET_ERROR_TYPE_DEBUG, | ||
1405 | "transmit_ready running (%p).\n", | ||
1406 | connection); | ||
1407 | GNUNET_assert (NULL != connection->write_task); | ||
1408 | connection->write_task = NULL; | ||
1409 | GNUNET_assert (NULL == connection->nth.timeout_task); | ||
1410 | tc = GNUNET_SCHEDULER_get_task_context (); | ||
1411 | if (0 != (tc->reason & GNUNET_SCHEDULER_REASON_TIMEOUT)) | ||
1412 | { | ||
1413 | LOG (GNUNET_ERROR_TYPE_DEBUG, | ||
1414 | "Transmit to `%s' fails, time out reached (%p).\n", | ||
1415 | GNUNET_a2s (connection->addr, | ||
1416 | connection->addrlen), | ||
1417 | connection); | ||
1418 | notify = connection->nth.notify_ready; | ||
1419 | GNUNET_assert (NULL != notify); | ||
1420 | connection->nth.notify_ready = NULL; | ||
1421 | notify (connection->nth.notify_ready_cls, 0, NULL); | ||
1422 | return; | ||
1423 | } | ||
1424 | GNUNET_assert (NULL != connection->sock); | ||
1425 | if (NULL == tc->write_ready) | ||
1426 | { | ||
1427 | /* special circumstances (in particular, PREREQ_DONE after | ||
1428 | * connect): not yet ready to write, but no "fatal" error either. | ||
1429 | * Hence retry. */ | ||
1430 | goto SCHEDULE_WRITE; | ||
1431 | } | ||
1432 | if (! GNUNET_NETWORK_fdset_isset (tc->write_ready, | ||
1433 | connection->sock)) | ||
1434 | { | ||
1435 | GNUNET_assert (NULL == connection->write_task); | ||
1436 | /* special circumstances (in particular, shutdown): not yet ready | ||
1437 | * to write, but no "fatal" error either. Hence retry. */ | ||
1438 | goto SCHEDULE_WRITE; | ||
1439 | } | ||
1440 | GNUNET_assert (connection->write_buffer_off >= connection->write_buffer_pos); | ||
1441 | if ((NULL != connection->nth.notify_ready) && | ||
1442 | (connection->write_buffer_size < connection->nth.notify_size)) | ||
1443 | { | ||
1444 | connection->write_buffer = | ||
1445 | GNUNET_realloc (connection->write_buffer, connection->nth.notify_size); | ||
1446 | connection->write_buffer_size = connection->nth.notify_size; | ||
1447 | } | ||
1448 | process_notify (connection); | ||
1449 | have = connection->write_buffer_off - connection->write_buffer_pos; | ||
1450 | if (0 == have) | ||
1451 | { | ||
1452 | /* no data ready for writing, terminate write loop */ | ||
1453 | return; | ||
1454 | } | ||
1455 | GNUNET_assert (have <= connection->write_buffer_size); | ||
1456 | GNUNET_assert (have + connection->write_buffer_pos <= connection->write_buffer_size); | ||
1457 | GNUNET_assert (connection->write_buffer_pos <= connection->write_buffer_size); | ||
1458 | RETRY: | ||
1459 | ret = | ||
1460 | GNUNET_NETWORK_socket_send (connection->sock, | ||
1461 | &connection->write_buffer[connection->write_buffer_pos], | ||
1462 | have); | ||
1463 | if (-1 == ret) | ||
1464 | { | ||
1465 | if (EINTR == errno) | ||
1466 | goto RETRY; | ||
1467 | if (NULL != connection->write_task) | ||
1468 | { | ||
1469 | GNUNET_SCHEDULER_cancel (connection->write_task); | ||
1470 | connection->write_task = NULL; | ||
1471 | } | ||
1472 | signal_transmit_error (connection, errno); | ||
1473 | return; | ||
1474 | } | ||
1475 | LOG (GNUNET_ERROR_TYPE_DEBUG, | ||
1476 | "Connection transmitted %u/%u bytes to `%s' (%p)\n", | ||
1477 | (unsigned int) ret, | ||
1478 | have, | ||
1479 | GNUNET_a2s (connection->addr, | ||
1480 | connection->addrlen), | ||
1481 | connection); | ||
1482 | connection->write_buffer_pos += ret; | ||
1483 | if (connection->write_buffer_pos == connection->write_buffer_off) | ||
1484 | { | ||
1485 | /* transmitted all pending data */ | ||
1486 | connection->write_buffer_pos = 0; | ||
1487 | connection->write_buffer_off = 0; | ||
1488 | } | ||
1489 | if ( (0 == connection->write_buffer_off) && | ||
1490 | (NULL == connection->nth.notify_ready) ) | ||
1491 | return; /* all data sent! */ | ||
1492 | /* not done writing, schedule more */ | ||
1493 | SCHEDULE_WRITE: | ||
1494 | LOG (GNUNET_ERROR_TYPE_DEBUG, | ||
1495 | "Re-scheduling transmit_ready (more to do) (%p).\n", | ||
1496 | connection); | ||
1497 | have = connection->write_buffer_off - connection->write_buffer_pos; | ||
1498 | GNUNET_assert ( (NULL != connection->nth.notify_ready) || | ||
1499 | (have > 0) ); | ||
1500 | if (NULL == connection->write_task) | ||
1501 | connection->write_task = | ||
1502 | GNUNET_SCHEDULER_add_write_net ((connection->nth.notify_ready == | ||
1503 | NULL) ? GNUNET_TIME_UNIT_FOREVER_REL : | ||
1504 | GNUNET_TIME_absolute_get_remaining | ||
1505 | (connection->nth.transmit_timeout), | ||
1506 | connection->sock, | ||
1507 | &transmit_ready, connection); | ||
1508 | } | ||
1509 | |||
1510 | |||
1511 | /** | ||
1512 | * Ask the connection to call us once the specified number of bytes | ||
1513 | * are free in the transmission buffer. Will never call the @a notify | ||
1514 | * callback in this task, but always first go into the scheduler. | ||
1515 | * | ||
1516 | * @param connection connection | ||
1517 | * @param size number of bytes to send | ||
1518 | * @param timeout after how long should we give up (and call | ||
1519 | * @a notify with buf NULL and size 0)? | ||
1520 | * @param notify function to call | ||
1521 | * @param notify_cls closure for @a notify | ||
1522 | * @return non-NULL if the notify callback was queued, | ||
1523 | * NULL if we are already going to notify someone else (busy) | ||
1524 | */ | ||
1525 | struct GNUNET_CONNECTION_TransmitHandle * | ||
1526 | GNUNET_CONNECTION_notify_transmit_ready (struct GNUNET_CONNECTION_Handle *connection, | ||
1527 | size_t size, | ||
1528 | struct GNUNET_TIME_Relative timeout, | ||
1529 | GNUNET_CONNECTION_TransmitReadyNotify notify, | ||
1530 | void *notify_cls) | ||
1531 | { | ||
1532 | if (NULL != connection->nth.notify_ready) | ||
1533 | { | ||
1534 | GNUNET_assert (0); | ||
1535 | return NULL; | ||
1536 | } | ||
1537 | GNUNET_assert (NULL != notify); | ||
1538 | GNUNET_assert (size < GNUNET_SERVER_MAX_MESSAGE_SIZE); | ||
1539 | GNUNET_assert (connection->write_buffer_off <= connection->write_buffer_size); | ||
1540 | GNUNET_assert (connection->write_buffer_pos <= connection->write_buffer_size); | ||
1541 | GNUNET_assert (connection->write_buffer_pos <= connection->write_buffer_off); | ||
1542 | connection->nth.notify_ready = notify; | ||
1543 | connection->nth.notify_ready_cls = notify_cls; | ||
1544 | connection->nth.connection = connection; | ||
1545 | connection->nth.notify_size = size; | ||
1546 | connection->nth.transmit_timeout = GNUNET_TIME_relative_to_absolute (timeout); | ||
1547 | GNUNET_assert (NULL == connection->nth.timeout_task); | ||
1548 | if ((NULL == connection->sock) && | ||
1549 | (NULL == connection->ap_head) && | ||
1550 | (NULL == connection->dns_active) && | ||
1551 | (NULL == connection->proxy_handshake)) | ||
1552 | { | ||
1553 | if (NULL != connection->write_task) | ||
1554 | GNUNET_SCHEDULER_cancel (connection->write_task); | ||
1555 | connection->write_task = GNUNET_SCHEDULER_add_now (&connect_error, | ||
1556 | connection); | ||
1557 | return &connection->nth; | ||
1558 | } | ||
1559 | if (NULL != connection->write_task) | ||
1560 | return &connection->nth; /* previous transmission still in progress */ | ||
1561 | if (NULL != connection->sock) | ||
1562 | { | ||
1563 | /* connected, try to transmit now */ | ||
1564 | LOG (GNUNET_ERROR_TYPE_DEBUG, | ||
1565 | "Scheduling transmission (%p).\n", | ||
1566 | connection); | ||
1567 | connection->write_task = | ||
1568 | GNUNET_SCHEDULER_add_write_net (GNUNET_TIME_absolute_get_remaining | ||
1569 | (connection->nth.transmit_timeout), | ||
1570 | connection->sock, | ||
1571 | &transmit_ready, connection); | ||
1572 | return &connection->nth; | ||
1573 | } | ||
1574 | /* not yet connected, wait for connection */ | ||
1575 | LOG (GNUNET_ERROR_TYPE_DEBUG, | ||
1576 | "Need to wait to schedule transmission for connection, adding timeout task (%p).\n", | ||
1577 | connection); | ||
1578 | connection->nth.timeout_task = | ||
1579 | GNUNET_SCHEDULER_add_delayed (timeout, | ||
1580 | &transmit_timeout, | ||
1581 | connection); | ||
1582 | return &connection->nth; | ||
1583 | } | ||
1584 | |||
1585 | |||
1586 | /** | ||
1587 | * Cancel the specified transmission-ready notification. | ||
1588 | * | ||
1589 | * @param th notification to cancel | ||
1590 | */ | ||
1591 | void | ||
1592 | GNUNET_CONNECTION_notify_transmit_ready_cancel (struct GNUNET_CONNECTION_TransmitHandle *th) | ||
1593 | { | ||
1594 | GNUNET_assert (NULL != th->notify_ready); | ||
1595 | th->notify_ready = NULL; | ||
1596 | if (NULL != th->timeout_task) | ||
1597 | { | ||
1598 | GNUNET_SCHEDULER_cancel (th->timeout_task); | ||
1599 | th->timeout_task = NULL; | ||
1600 | } | ||
1601 | if (NULL != th->connection->write_task) | ||
1602 | { | ||
1603 | GNUNET_SCHEDULER_cancel (th->connection->write_task); | ||
1604 | th->connection->write_task = NULL; | ||
1605 | } | ||
1606 | } | ||
1607 | |||
1608 | |||
1609 | /** | ||
1610 | * Create a connection to be proxied using a given connection. | ||
1611 | * | ||
1612 | * @param cph connection to proxy server | ||
1613 | * @return connection to be proxied | ||
1614 | */ | ||
1615 | struct GNUNET_CONNECTION_Handle * | ||
1616 | GNUNET_CONNECTION_create_proxied_from_handshake (struct GNUNET_CONNECTION_Handle *cph) | ||
1617 | { | ||
1618 | struct GNUNET_CONNECTION_Handle *proxied = GNUNET_CONNECTION_create_from_existing (NULL); | ||
1619 | |||
1620 | proxied->proxy_handshake = cph; | ||
1621 | return proxied; | ||
1622 | } | ||
1623 | |||
1624 | |||
1625 | /** | ||
1626 | * Activate proxied connection and destroy initial proxy handshake connection. | ||
1627 | * There must not be any pending requests for reading or writing to the | ||
1628 | * proxy hadshake connection at this time. | ||
1629 | * | ||
1630 | * @param proxied connection connection to proxy server | ||
1631 | */ | ||
1632 | void | ||
1633 | GNUNET_CONNECTION_acivate_proxied (struct GNUNET_CONNECTION_Handle *proxied) | ||
1634 | { | ||
1635 | struct GNUNET_CONNECTION_Handle *cph = proxied->proxy_handshake; | ||
1636 | |||
1637 | GNUNET_assert (NULL != cph); | ||
1638 | GNUNET_assert (NULL == proxied->sock); | ||
1639 | GNUNET_assert (NULL != cph->sock); | ||
1640 | proxied->sock = cph->sock; | ||
1641 | cph->sock = NULL; | ||
1642 | GNUNET_CONNECTION_destroy (cph); | ||
1643 | connect_success_continuation (proxied); | ||
1644 | } | ||
1645 | |||
1646 | |||
1647 | /* end of connection.c */ | ||