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Diffstat (limited to 'src/service/transport/gnunet-communicator-quic.c')
-rw-r--r-- | src/service/transport/gnunet-communicator-quic.c | 1795 |
1 files changed, 1795 insertions, 0 deletions
diff --git a/src/service/transport/gnunet-communicator-quic.c b/src/service/transport/gnunet-communicator-quic.c new file mode 100644 index 000000000..0a7e511eb --- /dev/null +++ b/src/service/transport/gnunet-communicator-quic.c | |||
@@ -0,0 +1,1795 @@ | |||
1 | /* | ||
2 | This file is part of GNUnet | ||
3 | Copyright (C) 2010-2014, 2018, 2019 GNUnet e.V. | ||
4 | |||
5 | GNUnet is free software: you can redistribute it and/or modify it | ||
6 | under the terms of the GNU Affero General Public License as published | ||
7 | by the Free Software Foundation, either version 3 of the License, | ||
8 | or (at your option) any later version. | ||
9 | |||
10 | GNUnet is distributed in the hope that it will be useful, but | ||
11 | WITHOUT ANY WARRANTY; without even the implied warranty of | ||
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
13 | Affero General Public License for more details. | ||
14 | |||
15 | You should have received a copy of the GNU Affero General Public License | ||
16 | along with this program. If not, see <http://www.gnu.org/licenses/>. | ||
17 | |||
18 | SPDX-License-Identifier: AGPL3.0-or-later | ||
19 | */ | ||
20 | |||
21 | /** | ||
22 | * @file transport/gnunet-communicator-quic.c | ||
23 | * @brief Transport plugin using QUIC. | ||
24 | * @author Marshall Stone | ||
25 | * @author Martin Schanzenbach | ||
26 | * | ||
27 | * TODO: | ||
28 | * - Automatically generate self-signed x509 certificates and load from config | ||
29 | * - Figure out MTU and how we have to handle fragmentation in Quiche. | ||
30 | * - Mandate timeouts | ||
31 | * - Setup stats handler properly | ||
32 | * - Doxygen documentation of methods | ||
33 | * - Refactor code shared with UDP and TCP communicator | ||
34 | * - Performance testing | ||
35 | * - Check for memory leaks with coverity/valgrind | ||
36 | */ | ||
37 | #include "gnunet_common.h" | ||
38 | #include "gnunet_util_lib.h" | ||
39 | #include "gnunet_core_service.h" | ||
40 | #include "quiche.h" | ||
41 | #include "platform.h" | ||
42 | #include "gnunet_protocols.h" | ||
43 | #include "gnunet_signatures.h" | ||
44 | #include "gnunet_constants.h" | ||
45 | #include "gnunet_statistics_service.h" | ||
46 | #include "gnunet_transport_application_service.h" | ||
47 | #include "gnunet_transport_communication_service.h" | ||
48 | #include "gnunet_nat_service.h" | ||
49 | #include "stdint.h" | ||
50 | #include "inttypes.h" | ||
51 | |||
52 | #define COMMUNICATOR_CONFIG_SECTION "communicator-quic" | ||
53 | #define COMMUNICATOR_ADDRESS_PREFIX "quic" | ||
54 | #define MAX_DATAGRAM_SIZE 1350 | ||
55 | |||
56 | |||
57 | /* FIXME: Review all static lengths/contents below. Maybe this can be done smarter */ | ||
58 | /* Currently equivalent to QUICHE_MAX_CONN_ID_LEN */ | ||
59 | #define LOCAL_CONN_ID_LEN 20 | ||
60 | #define MAX_TOKEN_LEN \ | ||
61 | sizeof("quiche") - 1 \ | ||
62 | + sizeof(struct sockaddr_storage) \ | ||
63 | + QUICHE_MAX_CONN_ID_LEN | ||
64 | #define CID_LEN sizeof(uint8_t) * QUICHE_MAX_CONN_ID_LEN | ||
65 | #define TOKEN_LEN sizeof (uint8_t) * MAX_TOKEN_LEN | ||
66 | |||
67 | |||
68 | /* FIXME: Why 4? | ||
69 | Generic, bidirectional, client-initiated quic stream id */ | ||
70 | #define STREAMID_BI 4 | ||
71 | |||
72 | /** | ||
73 | * How long do we believe our addresses to remain up (before | ||
74 | * the other peer should revalidate). | ||
75 | */ | ||
76 | #define ADDRESS_VALIDITY_PERIOD GNUNET_TIME_UNIT_HOURS | ||
77 | |||
78 | /** | ||
79 | * Map of DCID (uint8_t) -> quic_conn for quickly retrieving connections to other peers. | ||
80 | */ | ||
81 | struct GNUNET_CONTAINER_MultiHashMap *conn_map; | ||
82 | |||
83 | /** | ||
84 | * Map of sockaddr -> struct PeerAddress | ||
85 | */ | ||
86 | struct GNUNET_CONTAINER_MultiHashMap *addr_map; | ||
87 | |||
88 | /** | ||
89 | * Handle to the config | ||
90 | */ | ||
91 | static const struct GNUNET_CONFIGURATION_Handle *cfg; | ||
92 | |||
93 | /** | ||
94 | * FIXME undocumented | ||
95 | */ | ||
96 | static struct GNUNET_TIME_Relative rekey_interval; | ||
97 | |||
98 | /** | ||
99 | * FIXME undocumented | ||
100 | */ | ||
101 | static struct GNUNET_NETWORK_Handle *udp_sock; | ||
102 | |||
103 | /** | ||
104 | * FIXME undocumented | ||
105 | */ | ||
106 | static struct GNUNET_SCHEDULER_Task *read_task; | ||
107 | |||
108 | /** | ||
109 | * FIXME undocumented | ||
110 | */ | ||
111 | static struct GNUNET_TRANSPORT_CommunicatorHandle *ch; | ||
112 | |||
113 | /** | ||
114 | * FIXME undocumented | ||
115 | */ | ||
116 | static struct GNUNET_TRANSPORT_ApplicationHandle *ah; | ||
117 | |||
118 | /** | ||
119 | * FIXME undocumented | ||
120 | */ | ||
121 | static int have_v6_socket; | ||
122 | |||
123 | /** | ||
124 | * FIXME undocumented | ||
125 | */ | ||
126 | static uint16_t my_port; | ||
127 | |||
128 | /** | ||
129 | * FIXME undocumented | ||
130 | */ | ||
131 | static unsigned long long rekey_max_bytes; | ||
132 | |||
133 | /** | ||
134 | * FIXME undocumented | ||
135 | */ | ||
136 | static quiche_config *config = NULL; | ||
137 | |||
138 | /** | ||
139 | * Our peer identity | ||
140 | */ | ||
141 | struct GNUNET_PeerIdentity my_identity; | ||
142 | |||
143 | /** | ||
144 | * Our private key. | ||
145 | */ | ||
146 | static struct GNUNET_CRYPTO_EddsaPrivateKey *my_private_key; | ||
147 | |||
148 | /** | ||
149 | * Connection to NAT service. | ||
150 | */ | ||
151 | static struct GNUNET_NAT_Handle *nat; | ||
152 | |||
153 | /** | ||
154 | * Information we track per peer we have recently been in contact with. | ||
155 | * | ||
156 | * (Since quiche handles crypto, handshakes, etc. we don't differentiate | ||
157 | * between SenderAddress and ReceiverAddress) | ||
158 | * FIXME: But we do a handshake as well. The flag in this struct seems to | ||
159 | * indicate this. Update comment! | ||
160 | */ | ||
161 | struct PeerAddress | ||
162 | { | ||
163 | /** | ||
164 | * To whom are we talking to. | ||
165 | */ | ||
166 | struct GNUNET_PeerIdentity target; | ||
167 | |||
168 | /** | ||
169 | * Flag to indicate whether we know the PeerIdentity (target) yet | ||
170 | */ | ||
171 | int id_rcvd; | ||
172 | |||
173 | /** | ||
174 | * Flag to indicate whether we have sent OUR PeerIdentity to this peer | ||
175 | */ | ||
176 | int id_sent; | ||
177 | |||
178 | /** | ||
179 | * Flag to indicate if we are the initiator of the connection | ||
180 | */ | ||
181 | int is_receiver; | ||
182 | |||
183 | /** | ||
184 | * Address of the receiver in the human-readable format | ||
185 | * with the #COMMUNICATOR_ADDRESS_PREFIX. | ||
186 | */ | ||
187 | char *foreign_addr; | ||
188 | |||
189 | /** | ||
190 | * Address of the other peer. | ||
191 | */ | ||
192 | struct sockaddr *address; | ||
193 | |||
194 | /** | ||
195 | * Length of the address. | ||
196 | */ | ||
197 | socklen_t address_len; | ||
198 | |||
199 | /** | ||
200 | * The QUIC connection associated with this peer | ||
201 | */ | ||
202 | struct quic_conn *conn; | ||
203 | |||
204 | /** | ||
205 | * Default message queue we are providing for the #ch. | ||
206 | */ | ||
207 | struct GNUNET_MQ_Handle *d_mq; | ||
208 | |||
209 | /** | ||
210 | * handle for default queue with the #ch. | ||
211 | */ | ||
212 | struct GNUNET_TRANSPORT_QueueHandle *d_qh; | ||
213 | |||
214 | /** | ||
215 | * Timeout for this peer address. | ||
216 | */ | ||
217 | struct GNUNET_TIME_Absolute timeout; | ||
218 | |||
219 | /** | ||
220 | * MTU we allowed transport for this peer's default queue. | ||
221 | * FIXME: MTU from quiche | ||
222 | */ | ||
223 | size_t d_mtu; | ||
224 | |||
225 | /** | ||
226 | * Which network type does this queue use? | ||
227 | */ | ||
228 | enum GNUNET_NetworkType nt; | ||
229 | |||
230 | /** | ||
231 | * receiver_destroy already called on receiver. | ||
232 | */ | ||
233 | int peer_destroy_called; | ||
234 | |||
235 | /** | ||
236 | * FIXME implementation missing | ||
237 | * Entry in sender expiration heap. | ||
238 | */ | ||
239 | // struct GNUNET_CONTAINER_HeapNode *hn; | ||
240 | }; | ||
241 | |||
242 | // /** | ||
243 | // * FIXME: Implementation missing | ||
244 | // * Expiration heap for peers (contains `struct PeerAddress`) | ||
245 | // */ | ||
246 | // static struct GNUNET_CONTAINER_Heap *peers_heap; | ||
247 | |||
248 | /** | ||
249 | * ID of timeout task | ||
250 | */ | ||
251 | static struct GNUNET_SCHEDULER_Task *timeout_task; | ||
252 | |||
253 | /** | ||
254 | * Network scanner to determine network types. | ||
255 | */ | ||
256 | static struct GNUNET_NT_InterfaceScanner *is; | ||
257 | |||
258 | /** | ||
259 | * For logging statistics. | ||
260 | */ | ||
261 | static struct GNUNET_STATISTICS_Handle *stats; | ||
262 | |||
263 | /** | ||
264 | * QUIC connection object. A connection has a unique SCID/DCID pair. Here we store our SCID | ||
265 | * (incoming packet DCID field == outgoing packet SCID field) for a given connection. This | ||
266 | * is hashed for each unique quic_conn. | ||
267 | */ | ||
268 | struct quic_conn | ||
269 | { | ||
270 | uint8_t cid[LOCAL_CONN_ID_LEN]; | ||
271 | |||
272 | quiche_conn *conn; | ||
273 | }; | ||
274 | |||
275 | /** | ||
276 | * QUIC_header is used to store information received from an incoming QUIC packet | ||
277 | */ | ||
278 | struct QUIC_header | ||
279 | { | ||
280 | uint8_t type; | ||
281 | uint32_t version; | ||
282 | |||
283 | uint8_t scid[QUICHE_MAX_CONN_ID_LEN]; | ||
284 | size_t scid_len; | ||
285 | |||
286 | uint8_t dcid[QUICHE_MAX_CONN_ID_LEN]; | ||
287 | size_t dcid_len; | ||
288 | |||
289 | uint8_t odcid[QUICHE_MAX_CONN_ID_LEN]; | ||
290 | size_t odcid_len; | ||
291 | |||
292 | uint8_t token[MAX_TOKEN_LEN]; | ||
293 | size_t token_len; | ||
294 | }; | ||
295 | |||
296 | |||
297 | /** | ||
298 | * Given a PeerAddress, receive data from streams after doing connection logic. | ||
299 | * ASSUMES: connection is established to peer | ||
300 | */ | ||
301 | static void | ||
302 | recv_from_streams (struct PeerAddress *peer) | ||
303 | { | ||
304 | char stream_buf[UINT16_MAX]; | ||
305 | size_t buf_size = UINT16_MAX; | ||
306 | char *buf_ptr = stream_buf; | ||
307 | struct GNUNET_MessageHeader *hdr; | ||
308 | |||
309 | uint64_t s = 0; | ||
310 | quiche_stream_iter *readable; | ||
311 | bool fin; | ||
312 | ssize_t recv_len; | ||
313 | |||
314 | readable = quiche_conn_readable (peer->conn->conn); | ||
315 | while (quiche_stream_iter_next (readable, &s)) | ||
316 | { | ||
317 | GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "stream %" PRIu64 " is readable\n", | ||
318 | s); | ||
319 | fin = false; | ||
320 | recv_len = quiche_conn_stream_recv (peer->conn->conn, s, | ||
321 | (uint8_t *) stream_buf, buf_size, | ||
322 | &fin); | ||
323 | if (recv_len < 0) | ||
324 | { | ||
325 | GNUNET_log (GNUNET_ERROR_TYPE_ERROR, | ||
326 | "error while receiving data from stream %" PRIu64 "\n", s); | ||
327 | break; | ||
328 | } | ||
329 | /** | ||
330 | * FIXME: Do not use implicit booleans. Use GNUNET_YES, GNUNET_NO, GNUNET_SYSERR | ||
331 | * and check for that. | ||
332 | * | ||
333 | * Initial packet should contain peerid if they are the initiator | ||
334 | */ | ||
335 | if (! peer->is_receiver && GNUNET_NO == peer->id_rcvd) | ||
336 | { | ||
337 | if (recv_len < sizeof(struct GNUNET_PeerIdentity)) | ||
338 | { | ||
339 | GNUNET_log (GNUNET_ERROR_TYPE_ERROR, | ||
340 | "message recv len of %zd less than length of peer identity\n", | ||
341 | recv_len); | ||
342 | return; | ||
343 | } | ||
344 | GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, | ||
345 | "received peer identity\n"); | ||
346 | struct GNUNET_PeerIdentity *pid = (struct | ||
347 | GNUNET_PeerIdentity *) stream_buf; | ||
348 | peer->target = *pid; | ||
349 | peer->id_rcvd = GNUNET_YES; | ||
350 | buf_ptr += sizeof(struct GNUNET_PeerIdentity); | ||
351 | recv_len -= sizeof(struct GNUNET_PeerIdentity); | ||
352 | } | ||
353 | /** | ||
354 | * Parse messages to pass to communicator | ||
355 | */ | ||
356 | while (recv_len >= sizeof(struct GNUNET_MessageHeader)) | ||
357 | { | ||
358 | hdr = (struct GNUNET_MessageHeader *) buf_ptr; | ||
359 | if (ntohs (hdr->size) > recv_len) | ||
360 | { | ||
361 | GNUNET_log (GNUNET_ERROR_TYPE_ERROR, | ||
362 | "message size stated (%d) is greater than length of rcvd data (%zd)!\n", | ||
363 | ntohs (hdr->size), recv_len); | ||
364 | return; | ||
365 | } | ||
366 | GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "passing %zd bytes to core\n", | ||
367 | recv_len); | ||
368 | GNUNET_TRANSPORT_communicator_receive (ch, &peer->target, hdr, | ||
369 | ADDRESS_VALIDITY_PERIOD, NULL, | ||
370 | NULL); | ||
371 | recv_len -= ntohs (hdr->size); | ||
372 | buf_ptr += ntohs (hdr->size); | ||
373 | } | ||
374 | /** | ||
375 | * Check for leftover bytes | ||
376 | */ | ||
377 | if (0 != recv_len) | ||
378 | { | ||
379 | GNUNET_log (GNUNET_ERROR_TYPE_ERROR, | ||
380 | "message recv len of %zd less than length of message header\n", | ||
381 | recv_len); | ||
382 | } | ||
383 | /** | ||
384 | * FIXME: comment useless | ||
385 | * fin | ||
386 | */ | ||
387 | if (fin) | ||
388 | { | ||
389 | GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, | ||
390 | "fin received, closing connection\n"); | ||
391 | if (0 > quiche_conn_close (peer->conn->conn, true, 0, NULL, 0)) | ||
392 | { | ||
393 | GNUNET_log (GNUNET_ERROR_TYPE_ERROR, | ||
394 | "quiche failed to close connection to peer\n"); | ||
395 | } | ||
396 | } | ||
397 | } | ||
398 | quiche_stream_iter_free (readable); | ||
399 | } | ||
400 | |||
401 | |||
402 | /** | ||
403 | * FIXME: review token generation, assure tokens are generated properly. doxygen | ||
404 | */ | ||
405 | static void | ||
406 | mint_token (const uint8_t *dcid, size_t dcid_len, | ||
407 | struct sockaddr_storage *addr, socklen_t addr_len, | ||
408 | uint8_t *token, size_t *token_len) | ||
409 | { | ||
410 | GNUNET_memcpy (token, "quiche", sizeof("quiche") - 1); | ||
411 | GNUNET_memcpy (token + sizeof("quiche") - 1, addr, addr_len); | ||
412 | GNUNET_memcpy (token + sizeof("quiche") - 1 + addr_len, dcid, dcid_len); | ||
413 | |||
414 | *token_len = sizeof("quiche") - 1 + addr_len + dcid_len; | ||
415 | } | ||
416 | |||
417 | |||
418 | static enum GNUNET_GenericReturnValue | ||
419 | validate_token (const uint8_t *token, size_t token_len, | ||
420 | struct sockaddr_storage *addr, socklen_t addr_len, | ||
421 | uint8_t *odcid, size_t *odcid_len) | ||
422 | { | ||
423 | if ((token_len < sizeof("quiche") - 1) || | ||
424 | memcmp (token, "quiche", sizeof("quiche") - 1)) | ||
425 | { | ||
426 | return GNUNET_NO; | ||
427 | } | ||
428 | |||
429 | token += sizeof("quiche") - 1; | ||
430 | token_len -= sizeof("quiche") - 1; | ||
431 | |||
432 | if ((token_len < addr_len) || memcmp (token, addr, addr_len)) | ||
433 | { | ||
434 | return GNUNET_NO; | ||
435 | } | ||
436 | |||
437 | token += addr_len; | ||
438 | token_len -= addr_len; | ||
439 | |||
440 | if (*odcid_len < token_len) | ||
441 | { | ||
442 | return GNUNET_NO; | ||
443 | } | ||
444 | |||
445 | memcpy (odcid, token, token_len); | ||
446 | *odcid_len = token_len; | ||
447 | |||
448 | return GNUNET_OK; | ||
449 | } | ||
450 | |||
451 | |||
452 | static struct quic_conn* | ||
453 | create_conn (uint8_t *scid, size_t scid_len, | ||
454 | uint8_t *odcid, size_t odcid_len, | ||
455 | struct sockaddr *local_addr, | ||
456 | socklen_t local_addr_len, | ||
457 | struct sockaddr_storage *peer_addr, | ||
458 | socklen_t peer_addr_len) | ||
459 | { | ||
460 | struct quic_conn *conn; | ||
461 | quiche_conn *q_conn; | ||
462 | conn = GNUNET_new (struct quic_conn); | ||
463 | if (scid_len != LOCAL_CONN_ID_LEN) | ||
464 | { | ||
465 | GNUNET_log (GNUNET_ERROR_TYPE_ERROR, | ||
466 | "error while creating connection, scid length too short: %zu\n", | ||
467 | scid_len); | ||
468 | return NULL; | ||
469 | } | ||
470 | |||
471 | GNUNET_memcpy (conn->cid, scid, LOCAL_CONN_ID_LEN); | ||
472 | q_conn = quiche_accept (conn->cid, LOCAL_CONN_ID_LEN, | ||
473 | odcid, odcid_len, | ||
474 | local_addr, | ||
475 | local_addr_len, | ||
476 | (struct sockaddr *) peer_addr, | ||
477 | peer_addr_len, | ||
478 | config); | ||
479 | if (NULL == q_conn) | ||
480 | { | ||
481 | GNUNET_log (GNUNET_ERROR_TYPE_ERROR, | ||
482 | "quiche failed to create connection after call to quiche_accept\n"); | ||
483 | return NULL; | ||
484 | } | ||
485 | conn->conn = q_conn; | ||
486 | GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "new quic connection created\n"); | ||
487 | return conn; | ||
488 | } | ||
489 | |||
490 | |||
491 | static void | ||
492 | flush_egress (struct quic_conn *conn) | ||
493 | { | ||
494 | static uint8_t out[MAX_DATAGRAM_SIZE]; | ||
495 | quiche_send_info send_info; | ||
496 | |||
497 | ssize_t written; | ||
498 | ssize_t sent; | ||
499 | |||
500 | while (1) | ||
501 | { | ||
502 | written = quiche_conn_send (conn->conn, out, sizeof(out), &send_info); | ||
503 | if (QUICHE_ERR_DONE == written) | ||
504 | { | ||
505 | GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "done writing quic packets\n"); | ||
506 | break; | ||
507 | } | ||
508 | if (0 > written) | ||
509 | { | ||
510 | GNUNET_log (GNUNET_ERROR_TYPE_ERROR, | ||
511 | "quiche failed to create packet. quiche error: %zd\n", | ||
512 | written); | ||
513 | return; | ||
514 | } | ||
515 | sent = GNUNET_NETWORK_socket_sendto (udp_sock, out, written, | ||
516 | (struct sockaddr *) &send_info.to, | ||
517 | send_info.to_len); | ||
518 | if (sent != written) | ||
519 | { | ||
520 | GNUNET_log (GNUNET_ERROR_TYPE_ERROR, | ||
521 | "quiche failed to send data to peer\n"); | ||
522 | return; | ||
523 | } | ||
524 | GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "sent %zd bytes\n", sent); | ||
525 | } | ||
526 | } | ||
527 | |||
528 | |||
529 | /** | ||
530 | * Increment receiver timeout due to activity. | ||
531 | * | ||
532 | * @param receiver address for which the timeout should be rescheduled | ||
533 | */ | ||
534 | static void | ||
535 | reschedule_peer_timeout (struct PeerAddress *peer) | ||
536 | { | ||
537 | peer->timeout = | ||
538 | GNUNET_TIME_relative_to_absolute (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT); | ||
539 | // GNUNET_CONTAINER_heap_update_cost (peer->hn, | ||
540 | // peer->timeout.abs_value_us); | ||
541 | } | ||
542 | |||
543 | |||
544 | /** | ||
545 | * Destroys a receiving state due to timeout or shutdown. | ||
546 | * | ||
547 | * @param receiver entity to close down | ||
548 | */ | ||
549 | static void | ||
550 | peer_destroy (struct PeerAddress *peer) | ||
551 | { | ||
552 | struct GNUNET_HashCode addr_key; | ||
553 | |||
554 | peer->peer_destroy_called = GNUNET_YES; | ||
555 | GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, | ||
556 | "Disconnecting peer for peer `%s'\n", | ||
557 | GNUNET_i2s (&peer->target)); | ||
558 | if (NULL != peer->d_qh) | ||
559 | { | ||
560 | GNUNET_TRANSPORT_communicator_mq_del (peer->d_qh); | ||
561 | peer->d_qh = NULL; | ||
562 | } | ||
563 | // GNUNET_assert (peer == GNUNET_CONTAINER_heap_remove_node (peer->hn)); | ||
564 | /** | ||
565 | * Remove peer from hashmap | ||
566 | */ | ||
567 | GNUNET_CRYPTO_hash (peer->address, peer->address_len, &addr_key); | ||
568 | if (GNUNET_NO == GNUNET_CONTAINER_multihashmap_remove (addr_map, &addr_key, | ||
569 | peer)) | ||
570 | { | ||
571 | GNUNET_log (GNUNET_ERROR_TYPE_ERROR, | ||
572 | "tried to remove non-existent peer from addr map\n"); | ||
573 | return; | ||
574 | } | ||
575 | GNUNET_STATISTICS_set (stats, | ||
576 | "# peers active", | ||
577 | GNUNET_CONTAINER_multihashmap_size (addr_map), | ||
578 | GNUNET_NO); | ||
579 | quiche_conn_free (peer->conn->conn); | ||
580 | GNUNET_free (peer->address); | ||
581 | GNUNET_free (peer->foreign_addr); | ||
582 | GNUNET_free (peer->conn); | ||
583 | GNUNET_free (peer); | ||
584 | } | ||
585 | |||
586 | |||
587 | /** | ||
588 | * Iterator over all peers to clean up. | ||
589 | * | ||
590 | * @param cls NULL | ||
591 | * @param key peer->address | ||
592 | * @param value the peer to destroy | ||
593 | * @return #GNUNET_OK to continue to iterate | ||
594 | */ | ||
595 | static int | ||
596 | get_peer_delete_it (void *cls, | ||
597 | const struct GNUNET_HashCode *key, | ||
598 | void *value) | ||
599 | { | ||
600 | struct PeerAddress *peer = value; | ||
601 | (void) cls; | ||
602 | (void) key; | ||
603 | peer_destroy (peer); | ||
604 | return GNUNET_OK; | ||
605 | } | ||
606 | |||
607 | |||
608 | /** | ||
609 | * Signature of functions implementing the sending functionality of a | ||
610 | * message queue. | ||
611 | * | ||
612 | * @param mq the message queue | ||
613 | * @param msg the message to send | ||
614 | * @param impl_state our `struct PeerAddress` | ||
615 | */ | ||
616 | static void | ||
617 | mq_send_d (struct GNUNET_MQ_Handle *mq, | ||
618 | const struct GNUNET_MessageHeader *msg, | ||
619 | void *impl_state) | ||
620 | { | ||
621 | struct PeerAddress *peer = impl_state; | ||
622 | uint16_t msize = ntohs (msg->size); | ||
623 | ssize_t send_len; | ||
624 | |||
625 | if (NULL == peer->conn->conn) | ||
626 | { | ||
627 | GNUNET_log (GNUNET_ERROR_TYPE_ERROR, | ||
628 | "peer never established quic connection\n"); | ||
629 | return; | ||
630 | } | ||
631 | |||
632 | GNUNET_assert (mq == peer->d_mq); | ||
633 | if (msize > peer->d_mtu) | ||
634 | { | ||
635 | GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, | ||
636 | "msize: %u, mtu: %lu\n", | ||
637 | msize, | ||
638 | peer->d_mtu); | ||
639 | GNUNET_break (0); | ||
640 | if (GNUNET_YES != peer->peer_destroy_called) | ||
641 | { | ||
642 | GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, | ||
643 | "peer destroy called, destroying peer\n"); | ||
644 | peer_destroy (peer); | ||
645 | } | ||
646 | return; | ||
647 | } | ||
648 | reschedule_peer_timeout (peer); | ||
649 | |||
650 | send_len = quiche_conn_stream_send (peer->conn->conn, 4, (uint8_t *) msg, | ||
651 | msize, false); | ||
652 | if (send_len != msize) | ||
653 | { | ||
654 | GNUNET_log (GNUNET_ERROR_TYPE_ERROR, | ||
655 | "tried to send message and quiche returned %zd", send_len); | ||
656 | return; | ||
657 | } | ||
658 | flush_egress (peer->conn); | ||
659 | GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, | ||
660 | "sent a message of %zd bytes\n", send_len); | ||
661 | GNUNET_MQ_impl_send_continue (mq); | ||
662 | } | ||
663 | |||
664 | |||
665 | /** | ||
666 | * Signature of functions implementing the destruction of a message | ||
667 | * queue. Implementations must not free @a mq, but should take care | ||
668 | * of @a impl_state. | ||
669 | * | ||
670 | * @param mq the message queue to destroy | ||
671 | * @param impl_state our `struct PeerAddress` | ||
672 | */ | ||
673 | static void | ||
674 | mq_destroy_d (struct GNUNET_MQ_Handle *mq, void *impl_state) | ||
675 | { | ||
676 | struct PeerAddress *peer = impl_state; | ||
677 | GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, | ||
678 | "Default MQ destroyed\n"); | ||
679 | if (mq == peer->d_mq) | ||
680 | { | ||
681 | peer->d_mq = NULL; | ||
682 | if (GNUNET_YES != peer->peer_destroy_called) | ||
683 | peer_destroy (peer); | ||
684 | } | ||
685 | } | ||
686 | |||
687 | |||
688 | /** | ||
689 | * Implementation function that cancels the currently sent message. | ||
690 | * | ||
691 | * @param mq message queue | ||
692 | * @param impl_state our `struct PeerAddress` | ||
693 | */ | ||
694 | static void | ||
695 | mq_cancel (struct GNUNET_MQ_Handle *mq, void *impl_state) | ||
696 | { | ||
697 | /* Cancellation is impossible with QUIC; bail */ | ||
698 | GNUNET_assert (0); | ||
699 | } | ||
700 | |||
701 | |||
702 | /** | ||
703 | * Generic error handler, called with the appropriate | ||
704 | * error code and the same closure specified at the creation of | ||
705 | * the message queue. | ||
706 | * Not every message queue implementation supports an error handler. | ||
707 | * | ||
708 | * @param cls our `struct ReceiverAddress` | ||
709 | * @param error error code | ||
710 | */ | ||
711 | static void | ||
712 | mq_error (void *cls, enum GNUNET_MQ_Error error) | ||
713 | { | ||
714 | struct PeerAddress *peer = cls; | ||
715 | |||
716 | GNUNET_log (GNUNET_ERROR_TYPE_ERROR, | ||
717 | "MQ error in queue to %s: %d\n", | ||
718 | GNUNET_i2s (&peer->target), | ||
719 | (int) error); | ||
720 | peer_destroy (peer); | ||
721 | } | ||
722 | |||
723 | |||
724 | /** | ||
725 | * Convert UDP bind specification to a `struct sockaddr *` | ||
726 | * | ||
727 | * @param bindto bind specification to convert | ||
728 | * @param[out] sock_len set to the length of the address | ||
729 | * @return converted bindto specification | ||
730 | */ | ||
731 | static struct sockaddr * | ||
732 | udp_address_to_sockaddr (const char *bindto, socklen_t *sock_len) | ||
733 | { | ||
734 | struct sockaddr *in; | ||
735 | unsigned int port; | ||
736 | char dummy[2]; | ||
737 | char *colon; | ||
738 | char *cp; | ||
739 | |||
740 | if (1 == sscanf (bindto, "%u%1s", &port, dummy)) | ||
741 | { | ||
742 | /* interpreting value as just a PORT number */ | ||
743 | if (port > UINT16_MAX) | ||
744 | { | ||
745 | GNUNET_log (GNUNET_ERROR_TYPE_ERROR, | ||
746 | "BINDTO specification `%s' invalid: value too large for port\n", | ||
747 | bindto); | ||
748 | return NULL; | ||
749 | } | ||
750 | if ((GNUNET_NO == GNUNET_NETWORK_test_pf (PF_INET6)) || | ||
751 | (GNUNET_YES == | ||
752 | GNUNET_CONFIGURATION_get_value_yesno (cfg, | ||
753 | COMMUNICATOR_CONFIG_SECTION, | ||
754 | "DISABLE_V6"))) | ||
755 | { | ||
756 | struct sockaddr_in *i4; | ||
757 | |||
758 | i4 = GNUNET_malloc (sizeof(struct sockaddr_in)); | ||
759 | i4->sin_family = AF_INET; | ||
760 | i4->sin_port = htons ((uint16_t) port); | ||
761 | *sock_len = sizeof(struct sockaddr_in); | ||
762 | in = (struct sockaddr *) i4; | ||
763 | } | ||
764 | else | ||
765 | { | ||
766 | struct sockaddr_in6 *i6; | ||
767 | |||
768 | i6 = GNUNET_malloc (sizeof(struct sockaddr_in6)); | ||
769 | i6->sin6_family = AF_INET6; | ||
770 | i6->sin6_port = htons ((uint16_t) port); | ||
771 | *sock_len = sizeof(struct sockaddr_in6); | ||
772 | in = (struct sockaddr *) i6; | ||
773 | } | ||
774 | return in; | ||
775 | } | ||
776 | cp = GNUNET_strdup (bindto); | ||
777 | colon = strrchr (cp, ':'); | ||
778 | if (NULL != colon) | ||
779 | { | ||
780 | /* interpret value after colon as port */ | ||
781 | *colon = '\0'; | ||
782 | colon++; | ||
783 | if (1 == sscanf (colon, "%u%1s", &port, dummy)) | ||
784 | { | ||
785 | /* interpreting value as just a PORT number */ | ||
786 | if (port > UINT16_MAX) | ||
787 | { | ||
788 | GNUNET_log (GNUNET_ERROR_TYPE_ERROR, | ||
789 | "BINDTO specification `%s' invalid: value too large for port\n", | ||
790 | bindto); | ||
791 | GNUNET_free (cp); | ||
792 | return NULL; | ||
793 | } | ||
794 | } | ||
795 | else | ||
796 | { | ||
797 | GNUNET_log ( | ||
798 | GNUNET_ERROR_TYPE_ERROR, | ||
799 | "BINDTO specification `%s' invalid: last ':' not followed by number\n", | ||
800 | bindto); | ||
801 | GNUNET_free (cp); | ||
802 | return NULL; | ||
803 | } | ||
804 | } | ||
805 | else | ||
806 | { | ||
807 | /* interpret missing port as 0, aka pick any free one */ | ||
808 | port = 0; | ||
809 | } | ||
810 | { | ||
811 | /* try IPv4 */ | ||
812 | struct sockaddr_in v4; | ||
813 | |||
814 | memset (&v4, 0, sizeof(v4)); | ||
815 | if (1 == inet_pton (AF_INET, cp, &v4.sin_addr)) | ||
816 | { | ||
817 | v4.sin_family = AF_INET; | ||
818 | v4.sin_port = htons ((uint16_t) port); | ||
819 | #if HAVE_SOCKADDR_IN_SIN_LEN | ||
820 | v4.sin_len = sizeof(struct sockaddr_in); | ||
821 | #endif | ||
822 | in = GNUNET_memdup (&v4, sizeof(struct sockaddr_in)); | ||
823 | *sock_len = sizeof(struct sockaddr_in); | ||
824 | GNUNET_free (cp); | ||
825 | return in; | ||
826 | } | ||
827 | } | ||
828 | { | ||
829 | /* try IPv6 */ | ||
830 | struct sockaddr_in6 v6; | ||
831 | const char *start; | ||
832 | |||
833 | memset (&v6, 0, sizeof(v6)); | ||
834 | start = cp; | ||
835 | if (('[' == *cp) && (']' == cp[strlen (cp) - 1])) | ||
836 | { | ||
837 | start++; /* skip over '[' */ | ||
838 | cp[strlen (cp) - 1] = '\0'; /* eat ']' */ | ||
839 | } | ||
840 | if (1 == inet_pton (AF_INET6, start, &v6.sin6_addr)) | ||
841 | { | ||
842 | v6.sin6_family = AF_INET6; | ||
843 | v6.sin6_port = htons ((uint16_t) port); | ||
844 | #if HAVE_SOCKADDR_IN_SIN_LEN | ||
845 | v6.sin6_len = sizeof(sizeof(struct sockaddr_in6)); | ||
846 | #endif | ||
847 | in = GNUNET_memdup (&v6, sizeof(v6)); | ||
848 | *sock_len = sizeof(v6); | ||
849 | GNUNET_free (cp); | ||
850 | return in; | ||
851 | } | ||
852 | } | ||
853 | /* #5528 FIXME (feature!): maybe also try getnameinfo()? */ | ||
854 | GNUNET_free (cp); | ||
855 | return NULL; | ||
856 | } | ||
857 | |||
858 | |||
859 | /** | ||
860 | * Setup the MQ for the @a peer. If a queue exists, | ||
861 | * the existing one is destroyed. Then the MTU is | ||
862 | * recalculated and a fresh queue is initialized. | ||
863 | * | ||
864 | * @param peer peer to setup MQ for | ||
865 | */ | ||
866 | static void | ||
867 | setup_peer_mq (struct PeerAddress *peer) | ||
868 | { | ||
869 | size_t base_mtu; | ||
870 | |||
871 | switch (peer->address->sa_family) | ||
872 | { | ||
873 | case AF_INET: | ||
874 | base_mtu = 1480 /* Ethernet MTU, 1500 - Ethernet header - VLAN tag */ | ||
875 | - sizeof(struct GNUNET_TUN_IPv4Header) /* 20 */ | ||
876 | - sizeof(struct GNUNET_TUN_UdpHeader) /* 8 */; | ||
877 | break; | ||
878 | |||
879 | case AF_INET6: | ||
880 | base_mtu = 1280 /* Minimum MTU required by IPv6 */ | ||
881 | - sizeof(struct GNUNET_TUN_IPv6Header) /* 40 */ | ||
882 | - sizeof(struct GNUNET_TUN_UdpHeader) /* 8 */; | ||
883 | break; | ||
884 | |||
885 | default: | ||
886 | GNUNET_assert (0); | ||
887 | break; | ||
888 | } | ||
889 | /* MTU == base_mtu */ | ||
890 | peer->d_mtu = base_mtu; | ||
891 | |||
892 | GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, | ||
893 | "Setting up MQs and QHs\n"); | ||
894 | /* => Effective MTU for CORE will range from 1080 (IPv6 + KX) to | ||
895 | 1404 (IPv4 + Box) bytes, depending on circumstances... */ | ||
896 | |||
897 | if (NULL == peer->d_mq) | ||
898 | peer->d_mq = GNUNET_MQ_queue_for_callbacks (&mq_send_d, | ||
899 | &mq_destroy_d, | ||
900 | &mq_cancel, | ||
901 | peer, | ||
902 | NULL, | ||
903 | &mq_error, | ||
904 | peer); | ||
905 | peer->d_qh = | ||
906 | GNUNET_TRANSPORT_communicator_mq_add (ch, | ||
907 | &peer->target, | ||
908 | peer->foreign_addr, | ||
909 | 1000, | ||
910 | GNUNET_TRANSPORT_QUEUE_LENGTH_UNLIMITED, | ||
911 | 0, /* Priority */ | ||
912 | peer->nt, | ||
913 | GNUNET_TRANSPORT_CS_OUTBOUND, | ||
914 | peer->d_mq); | ||
915 | } | ||
916 | |||
917 | |||
918 | /** | ||
919 | * Taken from: UDP communicator | ||
920 | * Converts @a address to the address string format used by this | ||
921 | * communicator in HELLOs. | ||
922 | * | ||
923 | * @param address the address to convert, must be AF_INET or AF_INET6. | ||
924 | * @param address_len number of bytes in @a address | ||
925 | * @return string representation of @a address | ||
926 | */ | ||
927 | static char * | ||
928 | sockaddr_to_udpaddr_string (const struct sockaddr *address, | ||
929 | socklen_t address_len) | ||
930 | { | ||
931 | char *ret; | ||
932 | |||
933 | switch (address->sa_family) | ||
934 | { | ||
935 | case AF_INET: | ||
936 | GNUNET_asprintf (&ret, | ||
937 | "%s-%s", | ||
938 | COMMUNICATOR_ADDRESS_PREFIX, | ||
939 | GNUNET_a2s (address, address_len)); | ||
940 | break; | ||
941 | |||
942 | case AF_INET6: | ||
943 | GNUNET_asprintf (&ret, | ||
944 | "%s-%s", | ||
945 | COMMUNICATOR_ADDRESS_PREFIX, | ||
946 | GNUNET_a2s (address, address_len)); | ||
947 | break; | ||
948 | |||
949 | default: | ||
950 | GNUNET_assert (0); | ||
951 | } | ||
952 | return ret; | ||
953 | } | ||
954 | |||
955 | |||
956 | /** | ||
957 | * Function called when the transport service has received a | ||
958 | * backchannel message for this communicator (!) via a different return | ||
959 | * path. Should be an acknowledgement. | ||
960 | * | ||
961 | * @param cls closure, NULL | ||
962 | * @param sender which peer sent the notification | ||
963 | * @param msg payload | ||
964 | */ | ||
965 | static void | ||
966 | notify_cb (void *cls, | ||
967 | const struct GNUNET_PeerIdentity *sender, | ||
968 | const struct GNUNET_MessageHeader *msg) | ||
969 | { | ||
970 | // const struct UDPAck *ack; | ||
971 | |||
972 | // (void) cls; | ||
973 | // GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, | ||
974 | // "Storing UDPAck received from backchannel from %s\n", | ||
975 | // GNUNET_i2s_full (sender)); | ||
976 | // if ((ntohs (msg->type) != GNUNET_MESSAGE_TYPE_COMMUNICATOR_UDP_ACK) || | ||
977 | // (ntohs (msg->size) != sizeof(struct UDPAck))) | ||
978 | // { | ||
979 | // GNUNET_break_op (0); | ||
980 | // return; | ||
981 | // } | ||
982 | // ack = (const struct UDPAck *) msg; | ||
983 | // GNUNET_CONTAINER_multipeermap_get_multiple (receivers, | ||
984 | // sender, | ||
985 | // &handle_ack, | ||
986 | // (void *) ack); | ||
987 | } | ||
988 | |||
989 | |||
990 | /** | ||
991 | * Task run to check #receiver_heap and #sender_heap for timeouts. | ||
992 | * | ||
993 | * @param cls unused, NULL | ||
994 | */ | ||
995 | static void | ||
996 | check_timeouts (void *cls) | ||
997 | { | ||
998 | // struct GNUNET_TIME_Relative st; | ||
999 | // struct GNUNET_TIME_Relative rt; | ||
1000 | // struct GNUNET_TIME_Relative delay; | ||
1001 | // struct ReceiverAddress *receiver; | ||
1002 | // struct SenderAddress *sender; | ||
1003 | |||
1004 | // (void) cls; | ||
1005 | // timeout_task = NULL; | ||
1006 | // rt = GNUNET_TIME_UNIT_FOREVER_REL; | ||
1007 | // while (NULL != (receiver = GNUNET_CONTAINER_heap_peek (receivers_heap))) | ||
1008 | // { | ||
1009 | // /* if (GNUNET_YES != receiver->receiver_destroy_called) */ | ||
1010 | // /* { */ | ||
1011 | // rt = GNUNET_TIME_absolute_get_remaining (receiver->timeout); | ||
1012 | // if (0 != rt.rel_value_us) | ||
1013 | // break; | ||
1014 | // GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, | ||
1015 | // "Receiver timed out\n"); | ||
1016 | // receiver_destroy (receiver); | ||
1017 | // // } | ||
1018 | // } | ||
1019 | // st = GNUNET_TIME_UNIT_FOREVER_REL; | ||
1020 | // while (NULL != (sender = GNUNET_CONTAINER_heap_peek (senders_heap))) | ||
1021 | // { | ||
1022 | // if (GNUNET_YES != sender->sender_destroy_called) | ||
1023 | // { | ||
1024 | // st = GNUNET_TIME_absolute_get_remaining (sender->timeout); | ||
1025 | // if (0 != st.rel_value_us) | ||
1026 | // break; | ||
1027 | // sender_destroy (sender); | ||
1028 | // } | ||
1029 | // } | ||
1030 | // delay = GNUNET_TIME_relative_min (rt, st); | ||
1031 | // if (delay.rel_value_us < GNUNET_TIME_UNIT_FOREVER_REL.rel_value_us) | ||
1032 | // timeout_task = GNUNET_SCHEDULER_add_delayed (delay, &check_timeouts, NULL); | ||
1033 | } | ||
1034 | |||
1035 | |||
1036 | /** | ||
1037 | * Function called by the transport service to initialize a | ||
1038 | * message queue given address information about another peer. | ||
1039 | * If and when the communication channel is established, the | ||
1040 | * communicator must call #GNUNET_TRANSPORT_communicator_mq_add() | ||
1041 | * to notify the service that the channel is now up. It is | ||
1042 | * the responsibility of the communicator to manage sane | ||
1043 | * retries and timeouts for any @a peer/@a address combination | ||
1044 | * provided by the transport service. Timeouts and retries | ||
1045 | * do not need to be signalled to the transport service. | ||
1046 | * | ||
1047 | * @param cls closure | ||
1048 | * @param peer identity of the other peer | ||
1049 | * @param address where to send the message, human-readable | ||
1050 | * communicator-specific format, 0-terminated, UTF-8 | ||
1051 | * @return #GNUNET_OK on success, #GNUNET_SYSERR if the provided address is | ||
1052 | * invalid | ||
1053 | */ | ||
1054 | static int | ||
1055 | mq_init (void *cls, const struct GNUNET_PeerIdentity *peer_id, const | ||
1056 | char *address) | ||
1057 | { | ||
1058 | struct PeerAddress *peer; | ||
1059 | const char *path; | ||
1060 | struct sockaddr *in; | ||
1061 | socklen_t in_len; | ||
1062 | struct GNUNET_HashCode addr_key; | ||
1063 | uint8_t scid[LOCAL_CONN_ID_LEN]; | ||
1064 | |||
1065 | struct quic_conn *q_conn; | ||
1066 | char *bindto; | ||
1067 | socklen_t local_in_len; | ||
1068 | struct sockaddr *local_addr; | ||
1069 | |||
1070 | if (GNUNET_OK != | ||
1071 | GNUNET_CONFIGURATION_get_value_string (cfg, | ||
1072 | COMMUNICATOR_CONFIG_SECTION, | ||
1073 | "BINDTO", | ||
1074 | &bindto)) | ||
1075 | { | ||
1076 | GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR, | ||
1077 | COMMUNICATOR_CONFIG_SECTION, | ||
1078 | "BINDTO"); | ||
1079 | return GNUNET_SYSERR; | ||
1080 | } | ||
1081 | local_addr = udp_address_to_sockaddr (bindto, &local_in_len); | ||
1082 | |||
1083 | if (0 != strncmp (address, | ||
1084 | COMMUNICATOR_ADDRESS_PREFIX "-", | ||
1085 | strlen (COMMUNICATOR_ADDRESS_PREFIX "-"))) | ||
1086 | { | ||
1087 | GNUNET_break_op (0); | ||
1088 | return GNUNET_SYSERR; | ||
1089 | } | ||
1090 | path = &address[strlen (COMMUNICATOR_ADDRESS_PREFIX "-")]; | ||
1091 | in = udp_address_to_sockaddr (path, &in_len); | ||
1092 | GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "mq_init in_len length before: %d\n", | ||
1093 | in_len); | ||
1094 | /** | ||
1095 | * If we already have a queue with this peer, ignore | ||
1096 | */ | ||
1097 | GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "address string in mq_init: %s\n", | ||
1098 | address); | ||
1099 | GNUNET_CRYPTO_hash (address, strlen (address), &addr_key); | ||
1100 | peer = GNUNET_CONTAINER_multihashmap_get (addr_map, &addr_key); | ||
1101 | if (NULL != peer) | ||
1102 | { | ||
1103 | GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, | ||
1104 | "ignoring transport service mq request, we already have an mq with this peer (address)\n"); | ||
1105 | return GNUNET_SYSERR; | ||
1106 | } | ||
1107 | peer = GNUNET_new (struct PeerAddress); | ||
1108 | peer->address = in; | ||
1109 | peer->address_len = in_len; | ||
1110 | peer->target = *peer_id; | ||
1111 | peer->id_rcvd = GNUNET_YES; | ||
1112 | peer->is_receiver = GNUNET_YES; | ||
1113 | peer->nt = GNUNET_NT_scanner_get_type (is, in, in_len); | ||
1114 | peer->timeout = | ||
1115 | GNUNET_TIME_relative_to_absolute (GNUNET_CONSTANTS_IDLE_CONNECTION_TIMEOUT); | ||
1116 | GNUNET_STATISTICS_set (stats, | ||
1117 | "# peers active", | ||
1118 | GNUNET_CONTAINER_multihashmap_size (addr_map), | ||
1119 | GNUNET_NO); | ||
1120 | peer->foreign_addr = | ||
1121 | sockaddr_to_udpaddr_string (peer->address, peer->address_len); | ||
1122 | /** | ||
1123 | * Insert peer into hashmap | ||
1124 | */ | ||
1125 | GNUNET_CONTAINER_multihashmap_put (addr_map, &addr_key, | ||
1126 | peer, | ||
1127 | GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY); | ||
1128 | GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, | ||
1129 | "mq_init added new peer to the addr map\n"); | ||
1130 | /** | ||
1131 | * Before setting up peer mq, initiate a quic connection to the target (perform handshake w/ quiche) | ||
1132 | */ | ||
1133 | GNUNET_CRYPTO_random_block (GNUNET_CRYPTO_QUALITY_STRONG, scid, | ||
1134 | LOCAL_CONN_ID_LEN); | ||
1135 | q_conn = GNUNET_new (struct quic_conn); | ||
1136 | GNUNET_memcpy (q_conn->cid, scid, LOCAL_CONN_ID_LEN); | ||
1137 | peer->conn = q_conn; | ||
1138 | GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, | ||
1139 | "attempting to perform QUIC handshake with peer\n"); | ||
1140 | q_conn->conn = quiche_connect (peer->foreign_addr, scid, LOCAL_CONN_ID_LEN, | ||
1141 | local_addr, | ||
1142 | local_in_len, peer->address, peer->address_len, | ||
1143 | config); | ||
1144 | flush_egress (peer->conn); | ||
1145 | GNUNET_free (local_addr); | ||
1146 | return GNUNET_OK; | ||
1147 | /** | ||
1148 | * TODO: handle this | ||
1149 | */ | ||
1150 | // if (NULL == timeout_task) | ||
1151 | // timeout_task = GNUNET_SCHEDULER_add_now (&check_timeouts, NULL); | ||
1152 | } | ||
1153 | |||
1154 | |||
1155 | static void | ||
1156 | try_connection_reversal (void *cls, | ||
1157 | const struct sockaddr *addr, | ||
1158 | socklen_t addrlen) | ||
1159 | { | ||
1160 | /* FIXME: support reversal: #5529 */ | ||
1161 | GNUNET_log (GNUNET_ERROR_TYPE_INFO, | ||
1162 | "No connection reversal implemented!"); | ||
1163 | } | ||
1164 | |||
1165 | |||
1166 | /** | ||
1167 | * Signature of the callback passed to #GNUNET_NAT_register() for | ||
1168 | * a function to call whenever our set of 'valid' addresses changes. | ||
1169 | * | ||
1170 | * @param cls closure | ||
1171 | * @param app_ctx[in,out] location where the app can store stuff | ||
1172 | * on add and retrieve it on remove | ||
1173 | * @param add_remove #GNUNET_YES to add a new public IP address, | ||
1174 | * #GNUNET_NO to remove a previous (now invalid) one | ||
1175 | * @param ac address class the address belongs to | ||
1176 | * @param addr either the previous or the new public IP address | ||
1177 | * @param addrlen actual length of the @a addr | ||
1178 | */ | ||
1179 | static void | ||
1180 | nat_address_cb (void *cls, | ||
1181 | void **app_ctx, | ||
1182 | int add_remove, | ||
1183 | enum GNUNET_NAT_AddressClass ac, | ||
1184 | const struct sockaddr *addr, | ||
1185 | socklen_t addrlen) | ||
1186 | { | ||
1187 | char *my_addr; | ||
1188 | struct GNUNET_TRANSPORT_AddressIdentifier *ai; | ||
1189 | |||
1190 | if (GNUNET_YES == add_remove) | ||
1191 | { | ||
1192 | enum GNUNET_NetworkType nt; | ||
1193 | |||
1194 | GNUNET_asprintf (&my_addr, | ||
1195 | "%s-%s", | ||
1196 | COMMUNICATOR_ADDRESS_PREFIX, | ||
1197 | GNUNET_a2s (addr, addrlen)); | ||
1198 | nt = GNUNET_NT_scanner_get_type (is, addr, addrlen); | ||
1199 | ai = | ||
1200 | GNUNET_TRANSPORT_communicator_address_add (ch, | ||
1201 | my_addr, | ||
1202 | nt, | ||
1203 | GNUNET_TIME_UNIT_FOREVER_REL); | ||
1204 | GNUNET_free (my_addr); | ||
1205 | *app_ctx = ai; | ||
1206 | } | ||
1207 | else | ||
1208 | { | ||
1209 | ai = *app_ctx; | ||
1210 | GNUNET_TRANSPORT_communicator_address_remove (ai); | ||
1211 | *app_ctx = NULL; | ||
1212 | } | ||
1213 | } | ||
1214 | |||
1215 | |||
1216 | /** | ||
1217 | * Shutdown the QUIC communicator. | ||
1218 | * | ||
1219 | * @param cls NULL (always) | ||
1220 | */ | ||
1221 | static void | ||
1222 | do_shutdown (void *cls) | ||
1223 | { | ||
1224 | GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, | ||
1225 | "do_shutdown\n"); | ||
1226 | GNUNET_CONTAINER_multihashmap_iterate (addr_map, &get_peer_delete_it, NULL); | ||
1227 | GNUNET_CONTAINER_multihashmap_destroy (addr_map); | ||
1228 | quiche_config_free (config); | ||
1229 | |||
1230 | if (NULL != timeout_task) | ||
1231 | { | ||
1232 | GNUNET_SCHEDULER_cancel (timeout_task); | ||
1233 | timeout_task = NULL; | ||
1234 | } | ||
1235 | if (NULL != read_task) | ||
1236 | { | ||
1237 | GNUNET_SCHEDULER_cancel (read_task); | ||
1238 | read_task = NULL; | ||
1239 | } | ||
1240 | if (NULL != udp_sock) | ||
1241 | { | ||
1242 | GNUNET_break (GNUNET_OK == | ||
1243 | GNUNET_NETWORK_socket_close (udp_sock)); | ||
1244 | udp_sock = NULL; | ||
1245 | } | ||
1246 | if (NULL != ch) | ||
1247 | { | ||
1248 | GNUNET_TRANSPORT_communicator_disconnect (ch); | ||
1249 | ch = NULL; | ||
1250 | } | ||
1251 | if (NULL != ah) | ||
1252 | { | ||
1253 | GNUNET_TRANSPORT_application_done (ah); | ||
1254 | ah = NULL; | ||
1255 | } | ||
1256 | if (NULL != my_private_key) | ||
1257 | { | ||
1258 | GNUNET_free (my_private_key); | ||
1259 | my_private_key = NULL; | ||
1260 | } | ||
1261 | GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, | ||
1262 | "do_shutdown finished\n"); | ||
1263 | } | ||
1264 | |||
1265 | |||
1266 | static void | ||
1267 | sock_read (void *cls) | ||
1268 | { | ||
1269 | struct sockaddr_storage sa; | ||
1270 | struct sockaddr_in *addr_verify; | ||
1271 | socklen_t salen = sizeof(sa); | ||
1272 | uint8_t buf[UINT16_MAX]; | ||
1273 | uint8_t out[MAX_DATAGRAM_SIZE]; | ||
1274 | ssize_t rcvd; | ||
1275 | |||
1276 | ssize_t process_pkt; | ||
1277 | struct QUIC_header quic_header; | ||
1278 | uint8_t new_cid[LOCAL_CONN_ID_LEN]; | ||
1279 | |||
1280 | struct PeerAddress *peer; | ||
1281 | struct GNUNET_HashCode addr_key; | ||
1282 | |||
1283 | (void) cls; | ||
1284 | quic_header.scid_len = sizeof(quic_header.scid); | ||
1285 | quic_header.dcid_len = sizeof(quic_header.dcid); | ||
1286 | quic_header.odcid_len = sizeof(quic_header.odcid); | ||
1287 | quic_header.token_len = sizeof(quic_header.token); | ||
1288 | /** | ||
1289 | * Get local_addr, in_len for quiche | ||
1290 | */ | ||
1291 | char *bindto; | ||
1292 | socklen_t in_len; | ||
1293 | if (GNUNET_OK != | ||
1294 | GNUNET_CONFIGURATION_get_value_string (cfg, | ||
1295 | COMMUNICATOR_CONFIG_SECTION, | ||
1296 | "BINDTO", | ||
1297 | &bindto)) | ||
1298 | { | ||
1299 | GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR, | ||
1300 | COMMUNICATOR_CONFIG_SECTION, | ||
1301 | "BINDTO"); | ||
1302 | return; | ||
1303 | } | ||
1304 | struct sockaddr *local_addr = udp_address_to_sockaddr (bindto, &in_len); | ||
1305 | |||
1306 | read_task = GNUNET_SCHEDULER_add_read_net (GNUNET_TIME_UNIT_FOREVER_REL, | ||
1307 | udp_sock, | ||
1308 | &sock_read, | ||
1309 | NULL); | ||
1310 | while (1) | ||
1311 | { | ||
1312 | rcvd = GNUNET_NETWORK_socket_recvfrom (udp_sock, | ||
1313 | buf, | ||
1314 | sizeof(buf), | ||
1315 | (struct sockaddr *) &sa, | ||
1316 | &salen); | ||
1317 | if (-1 == rcvd) | ||
1318 | { | ||
1319 | if (EAGAIN == errno) | ||
1320 | break; // We are done reading data | ||
1321 | GNUNET_log_strerror (GNUNET_ERROR_TYPE_DEBUG, "recv"); | ||
1322 | return; | ||
1323 | } | ||
1324 | |||
1325 | GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, | ||
1326 | "Read %lu bytes\n", rcvd); | ||
1327 | |||
1328 | if (-1 == rcvd) | ||
1329 | { | ||
1330 | GNUNET_log_strerror (GNUNET_ERROR_TYPE_DEBUG, "recv"); | ||
1331 | return; | ||
1332 | } | ||
1333 | /** | ||
1334 | * FIXME: hashing address string vs ip/port. It is not ideal that | ||
1335 | * we hash the string, instead of the binary representation, but | ||
1336 | * for now it is certainly less code. | ||
1337 | * Note that simply hashing the sockaddr does NOT work because the | ||
1338 | * the struct is not portable. | ||
1339 | */ | ||
1340 | const char *addr_string = sockaddr_to_udpaddr_string ((const struct | ||
1341 | sockaddr *) &sa, | ||
1342 | salen); | ||
1343 | GNUNET_CRYPTO_hash (addr_string, strlen (addr_string), | ||
1344 | &addr_key); | ||
1345 | GNUNET_free (addr_string); | ||
1346 | peer = GNUNET_CONTAINER_multihashmap_get (addr_map, &addr_key); | ||
1347 | |||
1348 | if (NULL == peer) | ||
1349 | { | ||
1350 | /** | ||
1351 | * Create new PeerAddress (receiver) with id_rcvd = false | ||
1352 | */ | ||
1353 | peer = GNUNET_new (struct PeerAddress); | ||
1354 | peer->address = GNUNET_memdup (&sa, salen); | ||
1355 | peer->address_len = salen; | ||
1356 | peer->id_rcvd = GNUNET_NO; | ||
1357 | peer->id_sent = GNUNET_NO; | ||
1358 | peer->is_receiver = GNUNET_NO; | ||
1359 | peer->conn = NULL; | ||
1360 | peer->foreign_addr = sockaddr_to_udpaddr_string (peer->address, | ||
1361 | peer->address_len); | ||
1362 | /** | ||
1363 | * TODO: after connection established | ||
1364 | */ | ||
1365 | // setup_peer_mq (peer); | ||
1366 | if (GNUNET_SYSERR == GNUNET_CONTAINER_multihashmap_put (addr_map, | ||
1367 | &addr_key, | ||
1368 | peer, | ||
1369 | GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY)) | ||
1370 | { | ||
1371 | GNUNET_log (GNUNET_ERROR_TYPE_ERROR, | ||
1372 | "tried to add duplicate address into address map\n"); | ||
1373 | return; | ||
1374 | } | ||
1375 | GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, | ||
1376 | "sock_read added new peer to address map\n"); | ||
1377 | } | ||
1378 | |||
1379 | /** | ||
1380 | * Parse QUIC info | ||
1381 | */ | ||
1382 | int rc = quiche_header_info (buf, rcvd, LOCAL_CONN_ID_LEN, | ||
1383 | &quic_header.version, | ||
1384 | &quic_header.type, quic_header.scid, | ||
1385 | &quic_header.scid_len, quic_header.dcid, | ||
1386 | &quic_header.dcid_len, | ||
1387 | quic_header.token, &quic_header.token_len); | ||
1388 | if (0 > rc) | ||
1389 | { | ||
1390 | GNUNET_log (GNUNET_ERROR_TYPE_ERROR, | ||
1391 | "failed to parse quic header: %d\n", | ||
1392 | rc); | ||
1393 | return; | ||
1394 | } | ||
1395 | |||
1396 | /** | ||
1397 | * New QUIC connection with peer | ||
1398 | */ | ||
1399 | if (NULL == peer->conn) | ||
1400 | { | ||
1401 | GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, | ||
1402 | "attempting to create new connection\n"); | ||
1403 | if (0 == quiche_version_is_supported (quic_header.version)) | ||
1404 | { | ||
1405 | GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, | ||
1406 | "quic version negotiation initiated\n"); | ||
1407 | /** | ||
1408 | * FIXME variables are redeclared often. Refactor either | ||
1409 | * to declare variables once in the beginning or refactor into | ||
1410 | * method. | ||
1411 | * | ||
1412 | * Write a version negotiation packet to "out" | ||
1413 | */ | ||
1414 | ssize_t written = quiche_negotiate_version (quic_header.scid, | ||
1415 | quic_header.scid_len, | ||
1416 | quic_header.dcid, | ||
1417 | quic_header.dcid_len, | ||
1418 | out, sizeof(out)); | ||
1419 | if (0 > written) | ||
1420 | { | ||
1421 | GNUNET_log (GNUNET_ERROR_TYPE_ERROR, | ||
1422 | "quiche failed to generate version negotiation packet\n"); | ||
1423 | return; | ||
1424 | } | ||
1425 | ssize_t sent = GNUNET_NETWORK_socket_sendto (udp_sock, | ||
1426 | out, | ||
1427 | written, | ||
1428 | (struct sockaddr*) &sa, | ||
1429 | salen); | ||
1430 | if (sent != written) | ||
1431 | { | ||
1432 | GNUNET_log (GNUNET_ERROR_TYPE_ERROR, | ||
1433 | "failed to send version negotiation packet to peer\n"); | ||
1434 | return; | ||
1435 | } | ||
1436 | GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, | ||
1437 | "sent %zd bytes to peer during version negotiation\n", | ||
1438 | sent); | ||
1439 | return; | ||
1440 | } | ||
1441 | |||
1442 | if (0 == quic_header.token_len) | ||
1443 | { | ||
1444 | GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "quic stateless retry\n"); | ||
1445 | mint_token (quic_header.dcid, quic_header.dcid_len, &sa, salen, | ||
1446 | quic_header.token, &quic_header.token_len); | ||
1447 | |||
1448 | uint8_t new_cid[LOCAL_CONN_ID_LEN]; | ||
1449 | GNUNET_CRYPTO_random_block (GNUNET_CRYPTO_QUALITY_STRONG, new_cid, | ||
1450 | LOCAL_CONN_ID_LEN); | ||
1451 | |||
1452 | ssize_t written = quiche_retry (quic_header.scid, quic_header.scid_len, | ||
1453 | quic_header.dcid, quic_header.dcid_len, | ||
1454 | new_cid, LOCAL_CONN_ID_LEN, | ||
1455 | quic_header.token, | ||
1456 | quic_header.token_len, | ||
1457 | quic_header.version, out, sizeof(out)); | ||
1458 | if (0 > written) | ||
1459 | { | ||
1460 | GNUNET_log (GNUNET_ERROR_TYPE_ERROR, | ||
1461 | "quiche failed to write retry packet\n"); | ||
1462 | return; | ||
1463 | } | ||
1464 | ssize_t sent = GNUNET_NETWORK_socket_sendto (udp_sock, | ||
1465 | out, | ||
1466 | written, | ||
1467 | (struct sockaddr*) &sa, | ||
1468 | salen); | ||
1469 | if (written != sent) | ||
1470 | { | ||
1471 | GNUNET_log (GNUNET_ERROR_TYPE_ERROR, "failed to send retry packet\n"); | ||
1472 | return; | ||
1473 | } | ||
1474 | |||
1475 | GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "sent %zd bytes\n", sent); | ||
1476 | continue; | ||
1477 | } | ||
1478 | |||
1479 | if (GNUNET_OK != validate_token (quic_header.token, quic_header.token_len, | ||
1480 | &sa, salen, | ||
1481 | quic_header.odcid, | ||
1482 | &quic_header.odcid_len)) | ||
1483 | { | ||
1484 | GNUNET_log (GNUNET_ERROR_TYPE_ERROR, | ||
1485 | "invalid address validation token created\n"); | ||
1486 | return; | ||
1487 | } | ||
1488 | peer->conn = create_conn (quic_header.dcid, quic_header.dcid_len, | ||
1489 | quic_header.odcid, quic_header.odcid_len, | ||
1490 | local_addr, in_len, | ||
1491 | &sa, salen); | ||
1492 | if (NULL == peer->conn) | ||
1493 | { | ||
1494 | GNUNET_log (GNUNET_ERROR_TYPE_ERROR, | ||
1495 | "failed to create quic connection with peer\n"); | ||
1496 | return; | ||
1497 | } | ||
1498 | } // null connection | ||
1499 | |||
1500 | quiche_recv_info recv_info = { | ||
1501 | (struct sockaddr *) &sa, | ||
1502 | salen, | ||
1503 | |||
1504 | local_addr, | ||
1505 | in_len, | ||
1506 | }; | ||
1507 | /** | ||
1508 | * Send our PeerIdentity if the connection is established now | ||
1509 | */ | ||
1510 | if (quiche_conn_is_established (peer->conn->conn) && ! peer->id_sent && | ||
1511 | peer->is_receiver) | ||
1512 | { | ||
1513 | ssize_t send_len; | ||
1514 | |||
1515 | GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, | ||
1516 | "handshake established with peer, sending our peer id\n"); | ||
1517 | send_len = quiche_conn_stream_send (peer->conn->conn, STREAMID_BI, | ||
1518 | (const uint8_t *) &my_identity, | ||
1519 | sizeof(my_identity), | ||
1520 | false); | ||
1521 | if (0 > send_len) | ||
1522 | { | ||
1523 | GNUNET_log (GNUNET_ERROR_TYPE_ERROR, | ||
1524 | "failed to write peer identity packet. quiche error: %zd\n", | ||
1525 | send_len); | ||
1526 | return; | ||
1527 | } | ||
1528 | flush_egress (peer->conn); | ||
1529 | GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "peer identity sent to peer\n"); | ||
1530 | peer->id_sent = GNUNET_YES; | ||
1531 | GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, "setting up peer mq\n"); | ||
1532 | setup_peer_mq (peer); | ||
1533 | /** | ||
1534 | * After this, we should be all good to send/recv data | ||
1535 | */ | ||
1536 | } | ||
1537 | process_pkt = quiche_conn_recv (peer->conn->conn, buf, rcvd, &recv_info); | ||
1538 | if (0 > process_pkt) | ||
1539 | { | ||
1540 | GNUNET_log (GNUNET_ERROR_TYPE_ERROR, | ||
1541 | "quiche failed to process received packet: %zd\n", | ||
1542 | process_pkt); | ||
1543 | return; | ||
1544 | } | ||
1545 | GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, | ||
1546 | "quiche processed %zd bytes\n", process_pkt); | ||
1547 | // Check for data on all available streams if the connection is established | ||
1548 | if (GNUNET_YES == quiche_conn_is_established (peer->conn->conn)) | ||
1549 | { | ||
1550 | recv_from_streams (peer); | ||
1551 | } | ||
1552 | /** | ||
1553 | * TODO: Should we use a list instead of hashmap? | ||
1554 | * Overhead for hashing function, O(1) retrieval vs O(n) iteration with n=30? | ||
1555 | * | ||
1556 | * TODO: Is iteration necessary as in the quiche server example? | ||
1557 | */ | ||
1558 | quiche_stats stats; | ||
1559 | quiche_path_stats path_stats; | ||
1560 | |||
1561 | flush_egress (peer->conn); | ||
1562 | |||
1563 | if (quiche_conn_is_closed (peer->conn->conn)) | ||
1564 | { | ||
1565 | quiche_conn_stats (peer->conn->conn, &stats); | ||
1566 | quiche_conn_path_stats (peer->conn->conn, 0, &path_stats); | ||
1567 | |||
1568 | GNUNET_log (GNUNET_ERROR_TYPE_DEBUG, | ||
1569 | "connection closed. quiche stats: sent=%zu, recv=%zu\n", | ||
1570 | stats.sent, stats.recv); | ||
1571 | peer_destroy (peer); | ||
1572 | } | ||
1573 | } | ||
1574 | GNUNET_free (local_addr); | ||
1575 | } | ||
1576 | |||
1577 | |||
1578 | /** | ||
1579 | * Setup communicator and launch network interactions. | ||
1580 | * | ||
1581 | * @param cls NULL (always) | ||
1582 | * @param args remaining command-line arguments | ||
1583 | * @param cfgfile name of the configuration file used (for saving, can be NULL!) | ||
1584 | * @param c configuration | ||
1585 | */ | ||
1586 | static void | ||
1587 | run (void *cls, | ||
1588 | char *const *args, | ||
1589 | const char *cfgfile, | ||
1590 | const struct GNUNET_CONFIGURATION_Handle *c) | ||
1591 | { | ||
1592 | char *bindto; | ||
1593 | struct sockaddr *in; | ||
1594 | socklen_t in_len; | ||
1595 | struct sockaddr_storage in_sto; | ||
1596 | socklen_t sto_len; | ||
1597 | |||
1598 | (void) cls; | ||
1599 | cfg = c; | ||
1600 | |||
1601 | if (GNUNET_OK != | ||
1602 | GNUNET_CONFIGURATION_get_value_string (cfg, | ||
1603 | COMMUNICATOR_CONFIG_SECTION, | ||
1604 | "BINDTO", | ||
1605 | &bindto)) | ||
1606 | { | ||
1607 | GNUNET_log_config_missing (GNUNET_ERROR_TYPE_ERROR, | ||
1608 | COMMUNICATOR_CONFIG_SECTION, | ||
1609 | "BINDTO"); | ||
1610 | return; | ||
1611 | } | ||
1612 | |||
1613 | in = udp_address_to_sockaddr (bindto, &in_len); | ||
1614 | |||
1615 | if (NULL == in) | ||
1616 | { | ||
1617 | GNUNET_log (GNUNET_ERROR_TYPE_ERROR, | ||
1618 | "Failed to setup UDP socket address with path `%s'\n", | ||
1619 | bindto); | ||
1620 | GNUNET_free (bindto); | ||
1621 | return; | ||
1622 | } | ||
1623 | udp_sock = | ||
1624 | GNUNET_NETWORK_socket_create (in->sa_family, | ||
1625 | SOCK_DGRAM, | ||
1626 | IPPROTO_UDP); | ||
1627 | if (NULL == udp_sock) | ||
1628 | { | ||
1629 | GNUNET_log_strerror (GNUNET_ERROR_TYPE_ERROR, "socket"); | ||
1630 | GNUNET_free (in); | ||
1631 | GNUNET_free (bindto); | ||
1632 | return; | ||
1633 | } | ||
1634 | if (AF_INET6 == in->sa_family) | ||
1635 | have_v6_socket = GNUNET_YES; | ||
1636 | if (GNUNET_OK != | ||
1637 | GNUNET_NETWORK_socket_bind (udp_sock, | ||
1638 | in, | ||
1639 | in_len)) | ||
1640 | { | ||
1641 | GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_ERROR, | ||
1642 | "bind", | ||
1643 | bindto); | ||
1644 | GNUNET_NETWORK_socket_close (udp_sock); | ||
1645 | udp_sock = NULL; | ||
1646 | GNUNET_free (in); | ||
1647 | GNUNET_free (bindto); | ||
1648 | return; | ||
1649 | } | ||
1650 | sto_len = sizeof(in_sto); | ||
1651 | if (0 != getsockname (GNUNET_NETWORK_get_fd (udp_sock), | ||
1652 | (struct sockaddr *) &in_sto, | ||
1653 | &sto_len)) | ||
1654 | { | ||
1655 | memcpy (&in_sto, in, in_len); | ||
1656 | sto_len = in_len; | ||
1657 | } | ||
1658 | GNUNET_free (in); | ||
1659 | GNUNET_free (bindto); | ||
1660 | in = (struct sockaddr *) &in_sto; | ||
1661 | in_len = sto_len; | ||
1662 | GNUNET_log_from_nocheck (GNUNET_ERROR_TYPE_DEBUG, | ||
1663 | "transport", | ||
1664 | "Bound to `%s'\n", | ||
1665 | GNUNET_a2s ((const struct sockaddr *) &in_sto, | ||
1666 | sto_len)); | ||
1667 | switch (in->sa_family) | ||
1668 | { | ||
1669 | case AF_INET: | ||
1670 | my_port = ntohs (((struct sockaddr_in *) in)->sin_port); | ||
1671 | break; | ||
1672 | |||
1673 | case AF_INET6: | ||
1674 | my_port = ntohs (((struct sockaddr_in6 *) in)->sin6_port); | ||
1675 | break; | ||
1676 | |||
1677 | default: | ||
1678 | GNUNET_break (0); | ||
1679 | my_port = 0; | ||
1680 | } | ||
1681 | GNUNET_SCHEDULER_add_shutdown (&do_shutdown, NULL); | ||
1682 | /** | ||
1683 | * Setup QUICHE configuration | ||
1684 | */ | ||
1685 | config = quiche_config_new (QUICHE_PROTOCOL_VERSION); | ||
1686 | quiche_config_verify_peer (config, false); | ||
1687 | /** | ||
1688 | * TODO: configure TLS cert | ||
1689 | */ | ||
1690 | quiche_config_load_cert_chain_from_pem_file (config, "./cert.crt"); | ||
1691 | quiche_config_load_priv_key_from_pem_file (config, "./cert.key"); | ||
1692 | quiche_config_set_application_protos (config, | ||
1693 | (uint8_t *) | ||
1694 | "\x0ahq-interop\x05hq-29\x05hq-28\x05hq-27\x08http/0.9", | ||
1695 | 38); | ||
1696 | quiche_config_set_max_idle_timeout (config, 5000); | ||
1697 | quiche_config_set_max_recv_udp_payload_size (config, 1200); | ||
1698 | quiche_config_set_max_send_udp_payload_size (config, 1200); | ||
1699 | quiche_config_set_initial_max_data (config, 10000000); | ||
1700 | quiche_config_set_initial_max_stream_data_bidi_local (config, 1000000); | ||
1701 | quiche_config_set_initial_max_stream_data_bidi_remote (config, 1000000); | ||
1702 | quiche_config_set_initial_max_stream_data_uni (config, 1000000); | ||
1703 | quiche_config_set_initial_max_streams_bidi (config, 100); | ||
1704 | quiche_config_set_initial_max_streams_uni (config, 100); | ||
1705 | quiche_config_set_cc_algorithm (config, QUICHE_CC_RENO); | ||
1706 | quiche_config_set_disable_active_migration (config, true); | ||
1707 | addr_map = GNUNET_CONTAINER_multihashmap_create (2, GNUNET_NO); | ||
1708 | /** | ||
1709 | * Get our public key for initial packet | ||
1710 | */ | ||
1711 | my_private_key = GNUNET_CRYPTO_eddsa_key_create_from_configuration (cfg); | ||
1712 | if (NULL == my_private_key) | ||
1713 | { | ||
1714 | GNUNET_log ( | ||
1715 | GNUNET_ERROR_TYPE_ERROR, | ||
1716 | _ ( | ||
1717 | "Transport service is lacking key configuration settings. Exiting.\n")); | ||
1718 | GNUNET_SCHEDULER_shutdown (); | ||
1719 | return; | ||
1720 | } | ||
1721 | GNUNET_CRYPTO_eddsa_key_get_public (my_private_key, &my_identity.public_key); | ||
1722 | /* start reading */ | ||
1723 | read_task = GNUNET_SCHEDULER_add_read_net (GNUNET_TIME_UNIT_FOREVER_REL, | ||
1724 | udp_sock, | ||
1725 | &sock_read, | ||
1726 | NULL); | ||
1727 | ch = GNUNET_TRANSPORT_communicator_connect (cfg, | ||
1728 | COMMUNICATOR_CONFIG_SECTION, | ||
1729 | COMMUNICATOR_ADDRESS_PREFIX, | ||
1730 | GNUNET_TRANSPORT_CC_RELIABLE, | ||
1731 | &mq_init, | ||
1732 | NULL, | ||
1733 | ¬ify_cb, | ||
1734 | NULL); | ||
1735 | is = GNUNET_NT_scanner_init (); | ||
1736 | nat = GNUNET_NAT_register (cfg, | ||
1737 | COMMUNICATOR_CONFIG_SECTION, | ||
1738 | IPPROTO_UDP, | ||
1739 | 1 /* one address */, | ||
1740 | (const struct sockaddr **) &in, | ||
1741 | &in_len, | ||
1742 | &nat_address_cb, | ||
1743 | try_connection_reversal, | ||
1744 | NULL /* closure */); | ||
1745 | if (NULL == ch) | ||
1746 | { | ||
1747 | GNUNET_break (0); | ||
1748 | GNUNET_SCHEDULER_shutdown (); | ||
1749 | return; | ||
1750 | } | ||
1751 | ah = GNUNET_TRANSPORT_application_init (cfg); | ||
1752 | if (NULL == ah) | ||
1753 | { | ||
1754 | GNUNET_break (0); | ||
1755 | GNUNET_SCHEDULER_shutdown (); | ||
1756 | return; | ||
1757 | } | ||
1758 | |||
1759 | /* start broadcasting */ | ||
1760 | // if (GNUNET_YES != | ||
1761 | // GNUNET_CONFIGURATION_get_value_yesno (cfg, | ||
1762 | // COMMUNICATOR_CONFIG_SECTION, | ||
1763 | // "DISABLE_BROADCAST")) | ||
1764 | // { | ||
1765 | // broadcast_task = GNUNET_SCHEDULER_add_now (&do_broadcast, NULL); | ||
1766 | // } | ||
1767 | } | ||
1768 | |||
1769 | |||
1770 | int | ||
1771 | main (int argc, char *const *argv) | ||
1772 | { | ||
1773 | static const struct GNUNET_GETOPT_CommandLineOption options[] = { | ||
1774 | GNUNET_GETOPT_OPTION_END | ||
1775 | }; | ||
1776 | int ret; | ||
1777 | |||
1778 | GNUNET_log_from_nocheck (GNUNET_ERROR_TYPE_DEBUG, | ||
1779 | "transport", | ||
1780 | "Starting quic communicator\n"); | ||
1781 | if (GNUNET_OK != GNUNET_STRINGS_get_utf8_args (argc, argv, &argc, &argv)) | ||
1782 | return 2; | ||
1783 | |||
1784 | ret = (GNUNET_OK == GNUNET_PROGRAM_run (argc, | ||
1785 | argv, | ||
1786 | "gnunet-communicator-quic", | ||
1787 | _ ("GNUnet QUIC communicator"), | ||
1788 | options, | ||
1789 | &run, | ||
1790 | NULL)) | ||
1791 | ? 0 | ||
1792 | : 1; | ||
1793 | GNUNET_free_nz ((void *) argv); | ||
1794 | return ret; | ||
1795 | } | ||