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f538b421 HL |
1 | /* |
2 | * Copyright 2022 The OpenSSL Project Authors. All Rights Reserved. | |
3 | * | |
4 | * Licensed under the Apache License 2.0 (the "License"). You may not use | |
5 | * this file except in compliance with the License. You can obtain a copy | |
6 | * in the file LICENSE in the source distribution or at | |
7 | * https://www.openssl.org/source/license.html | |
8 | */ | |
9 | ||
10 | #include "internal/quic_channel.h" | |
11 | #include "internal/quic_error.h" | |
12 | #include "internal/quic_rx_depack.h" | |
13 | #include "../ssl_local.h" | |
14 | #include "quic_channel_local.h" | |
15 | #include <openssl/rand.h> | |
16 | ||
17 | #define INIT_DCID_LEN 8 | |
18 | #define INIT_CRYPTO_BUF_LEN 8192 | |
19 | #define INIT_APP_BUF_LEN 8192 | |
20 | ||
3bf4dc8c | 21 | static void ch_rx_pre(QUIC_CHANNEL *ch); |
f538b421 HL |
22 | static int ch_rx(QUIC_CHANNEL *ch); |
23 | static int ch_tx(QUIC_CHANNEL *ch); | |
24 | static void ch_tick(QUIC_TICK_RESULT *res, void *arg); | |
25 | static void ch_rx_handle_packet(QUIC_CHANNEL *ch); | |
26 | static OSSL_TIME ch_determine_next_tick_deadline(QUIC_CHANNEL *ch); | |
27 | static int ch_retry(QUIC_CHANNEL *ch, | |
28 | const unsigned char *retry_token, | |
29 | size_t retry_token_len, | |
30 | const QUIC_CONN_ID *retry_scid); | |
31 | static void ch_cleanup(QUIC_CHANNEL *ch); | |
32 | static int ch_generate_transport_params(QUIC_CHANNEL *ch); | |
33 | static int ch_on_transport_params(const unsigned char *params, | |
34 | size_t params_len, | |
35 | void *arg); | |
36 | static int ch_on_handshake_alert(void *arg, unsigned char alert_code); | |
37 | static int ch_on_handshake_complete(void *arg); | |
38 | static int ch_on_handshake_yield_secret(uint32_t enc_level, int direction, | |
39 | uint32_t suite_id, EVP_MD *md, | |
40 | const unsigned char *secret, | |
41 | size_t secret_len, | |
42 | void *arg); | |
43 | static int ch_on_crypto_recv(unsigned char *buf, size_t buf_len, | |
44 | size_t *bytes_read, void *arg); | |
45 | static int crypto_ensure_empty(QUIC_RSTREAM *rstream); | |
46 | static int ch_on_crypto_send(const unsigned char *buf, size_t buf_len, | |
47 | size_t *consumed, void *arg); | |
48 | static OSSL_TIME get_time(void *arg); | |
49 | static uint64_t get_stream_limit(int uni, void *arg); | |
50 | static int rx_early_validate(QUIC_PN pn, int pn_space, void *arg); | |
51 | static int ch_retry(QUIC_CHANNEL *ch, | |
52 | const unsigned char *retry_token, | |
53 | size_t retry_token_len, | |
54 | const QUIC_CONN_ID *retry_scid); | |
55 | static void ch_update_idle(QUIC_CHANNEL *ch); | |
56 | static int ch_discard_el(QUIC_CHANNEL *ch, | |
57 | uint32_t enc_level); | |
58 | static void ch_on_idle_timeout(QUIC_CHANNEL *ch); | |
59 | static void ch_update_idle(QUIC_CHANNEL *ch); | |
60 | static void ch_on_terminating_timeout(QUIC_CHANNEL *ch); | |
61 | static void ch_start_terminating(QUIC_CHANNEL *ch, | |
62 | const QUIC_TERMINATE_CAUSE *tcause); | |
63 | ||
64 | static int gen_rand_conn_id(OSSL_LIB_CTX *libctx, size_t len, QUIC_CONN_ID *cid) | |
65 | { | |
66 | if (len > QUIC_MAX_CONN_ID_LEN) | |
67 | return 0; | |
68 | ||
69 | cid->id_len = (unsigned char)len; | |
70 | ||
71 | if (RAND_bytes_ex(libctx, cid->id, len, len * 8) != 1) { | |
72 | cid->id_len = 0; | |
73 | return 0; | |
74 | } | |
75 | ||
76 | return 1; | |
77 | } | |
78 | ||
79 | /* | |
80 | * QUIC Channel Initialization and Teardown | |
81 | * ======================================== | |
82 | */ | |
83 | static int ch_init(QUIC_CHANNEL *ch) | |
84 | { | |
85 | OSSL_QUIC_TX_PACKETISER_ARGS txp_args = {0}; | |
86 | OSSL_QTX_ARGS qtx_args = {0}; | |
87 | OSSL_QRX_ARGS qrx_args = {0}; | |
88 | QUIC_DHS_ARGS dhs_args = {0}; | |
89 | uint32_t pn_space; | |
90 | ||
6292519c | 91 | /* TODO(QUIC): This is only applicable to clients. */ |
f538b421 HL |
92 | if (!gen_rand_conn_id(ch->libctx, INIT_DCID_LEN, &ch->init_dcid)) |
93 | goto err; | |
94 | ||
95 | /* We plug in a network write BIO to the QTX later when we get one. */ | |
96 | qtx_args.mdpl = QUIC_MIN_INITIAL_DGRAM_LEN; | |
97 | ch->rx_max_udp_payload_size = qtx_args.mdpl; | |
98 | ||
99 | ch->qtx = ossl_qtx_new(&qtx_args); | |
100 | if (ch->qtx == NULL) | |
101 | goto err; | |
102 | ||
103 | ch->txpim = ossl_quic_txpim_new(); | |
104 | if (ch->txpim == NULL) | |
105 | goto err; | |
106 | ||
107 | ch->cfq = ossl_quic_cfq_new(); | |
108 | if (ch->cfq == NULL) | |
109 | goto err; | |
110 | ||
111 | if (!ossl_quic_txfc_init(&ch->conn_txfc, NULL)) | |
112 | goto err; | |
113 | ||
114 | if (!ossl_quic_rxfc_init(&ch->conn_rxfc, NULL, | |
115 | 2 * 1024 * 1024, | |
116 | 10 * 1024 * 1024, | |
117 | get_time, NULL)) | |
118 | goto err; | |
119 | ||
120 | if (!ossl_statm_init(&ch->statm)) | |
121 | goto err; | |
122 | ||
123 | ch->have_statm = 1; | |
124 | ch->cc_method = &ossl_cc_dummy_method; | |
125 | if ((ch->cc_data = ch->cc_method->new(NULL, NULL, NULL)) == NULL) | |
126 | goto err; | |
127 | ||
128 | if ((ch->ackm = ossl_ackm_new(get_time, NULL, &ch->statm, | |
129 | ch->cc_method, ch->cc_data)) == NULL) | |
130 | goto err; | |
131 | ||
132 | if (!ossl_quic_stream_map_init(&ch->qsm, get_stream_limit, ch)) | |
133 | goto err; | |
134 | ||
135 | ch->have_qsm = 1; | |
136 | ||
137 | /* We use a zero-length SCID. */ | |
138 | txp_args.cur_dcid = ch->init_dcid; | |
139 | txp_args.ack_delay_exponent = 3; | |
140 | txp_args.qtx = ch->qtx; | |
141 | txp_args.txpim = ch->txpim; | |
142 | txp_args.cfq = ch->cfq; | |
143 | txp_args.ackm = ch->ackm; | |
144 | txp_args.qsm = &ch->qsm; | |
145 | txp_args.conn_txfc = &ch->conn_txfc; | |
146 | txp_args.conn_rxfc = &ch->conn_rxfc; | |
147 | txp_args.cc_method = ch->cc_method; | |
148 | txp_args.cc_data = ch->cc_data; | |
149 | txp_args.now = get_time; | |
150 | for (pn_space = QUIC_PN_SPACE_INITIAL; pn_space < QUIC_PN_SPACE_NUM; ++pn_space) { | |
151 | ch->crypto_send[pn_space] = ossl_quic_sstream_new(INIT_CRYPTO_BUF_LEN); | |
152 | if (ch->crypto_send[pn_space] == NULL) | |
153 | goto err; | |
154 | ||
155 | txp_args.crypto[pn_space] = ch->crypto_send[pn_space]; | |
156 | } | |
157 | ||
158 | ch->txp = ossl_quic_tx_packetiser_new(&txp_args); | |
159 | if (ch->txp == NULL) | |
160 | goto err; | |
161 | ||
162 | if ((ch->demux = ossl_quic_demux_new(/*BIO=*/NULL, /*Short CID Len=*/0, | |
d7668ff2 | 163 | get_time, NULL)) == NULL) |
f538b421 HL |
164 | goto err; |
165 | ||
166 | qrx_args.demux = ch->demux; | |
167 | qrx_args.short_conn_id_len = 0; /* We use a zero-length SCID. */ | |
168 | qrx_args.max_deferred = 32; | |
169 | ||
170 | if ((ch->qrx = ossl_qrx_new(&qrx_args)) == NULL) | |
171 | goto err; | |
172 | ||
173 | if (!ossl_qrx_set_early_validation_cb(ch->qrx, | |
174 | rx_early_validate, | |
175 | ch)) | |
176 | goto err; | |
177 | ||
178 | if (!ossl_qrx_add_dst_conn_id(ch->qrx, &txp_args.cur_scid)) | |
179 | goto err; | |
180 | ||
181 | for (pn_space = QUIC_PN_SPACE_INITIAL; pn_space < QUIC_PN_SPACE_NUM; ++pn_space) { | |
182 | ch->crypto_recv[pn_space] = ossl_quic_rstream_new(NULL, NULL); | |
183 | if (ch->crypto_recv[pn_space] == NULL) | |
184 | goto err; | |
185 | } | |
186 | ||
187 | if ((ch->stream0 = ossl_quic_stream_map_alloc(&ch->qsm, 0, | |
188 | QUIC_STREAM_INITIATOR_CLIENT | |
189 | | QUIC_STREAM_DIR_BIDI)) == NULL) | |
190 | goto err; | |
191 | ||
192 | if ((ch->stream0->sstream = ossl_quic_sstream_new(INIT_APP_BUF_LEN)) == NULL) | |
193 | goto err; | |
194 | ||
195 | if ((ch->stream0->rstream = ossl_quic_rstream_new(NULL, NULL)) == NULL) | |
196 | goto err; | |
197 | ||
198 | if (!ossl_quic_txfc_init(&ch->stream0->txfc, &ch->conn_txfc)) | |
199 | goto err; | |
200 | ||
201 | if (!ossl_quic_rxfc_init(&ch->stream0->rxfc, &ch->conn_rxfc, | |
202 | 1 * 1024 * 1024, | |
203 | 5 * 1024 * 1024, | |
204 | get_time, NULL)) | |
205 | goto err; | |
206 | ||
207 | /* Plug in the dummy handshake layer. */ | |
208 | dhs_args.crypto_send_cb = ch_on_crypto_send; | |
209 | dhs_args.crypto_send_cb_arg = ch; | |
210 | dhs_args.crypto_recv_cb = ch_on_crypto_recv; | |
211 | dhs_args.crypto_recv_cb_arg = ch; | |
212 | dhs_args.yield_secret_cb = ch_on_handshake_yield_secret; | |
213 | dhs_args.yield_secret_cb_arg = ch; | |
214 | dhs_args.got_transport_params_cb = ch_on_transport_params; | |
215 | dhs_args.got_transport_params_cb_arg= ch; | |
216 | dhs_args.handshake_complete_cb = ch_on_handshake_complete; | |
217 | dhs_args.handshake_complete_cb_arg = ch; | |
218 | dhs_args.alert_cb = ch_on_handshake_alert; | |
219 | dhs_args.alert_cb_arg = ch; | |
220 | ||
221 | if ((ch->dhs = ossl_quic_dhs_new(&dhs_args)) == NULL) | |
222 | goto err; | |
223 | ||
224 | /* | |
225 | * Determine the QUIC Transport Parameters and serialize the transport | |
226 | * parameters block. (For servers, we do this later as we must defer | |
227 | * generation until we have received the client's transport parameters.) | |
228 | */ | |
229 | if (!ch->is_server && !ch_generate_transport_params(ch)) | |
230 | goto err; | |
231 | ||
232 | ch->rx_max_ack_delay = QUIC_DEFAULT_MAX_ACK_DELAY; | |
233 | ch->rx_ack_delay_exp = QUIC_DEFAULT_ACK_DELAY_EXP; | |
234 | ch->rx_active_conn_id_limit = QUIC_MIN_ACTIVE_CONN_ID_LIMIT; | |
235 | ch->max_idle_timeout = QUIC_DEFAULT_IDLE_TIMEOUT; | |
236 | ch->tx_enc_level = QUIC_ENC_LEVEL_INITIAL; | |
45ecfc9b | 237 | ch->rx_enc_level = QUIC_ENC_LEVEL_INITIAL; |
f538b421 HL |
238 | ch_update_idle(ch); |
239 | ossl_quic_reactor_init(&ch->rtor, ch_tick, ch, | |
240 | ch_determine_next_tick_deadline(ch)); | |
241 | return 1; | |
242 | ||
243 | err: | |
244 | ch_cleanup(ch); | |
245 | return 0; | |
246 | } | |
247 | ||
248 | static void ch_cleanup(QUIC_CHANNEL *ch) | |
249 | { | |
250 | uint32_t pn_space; | |
251 | ||
252 | if (ch->ackm != NULL) | |
253 | for (pn_space = QUIC_PN_SPACE_INITIAL; | |
254 | pn_space < QUIC_PN_SPACE_NUM; | |
255 | ++pn_space) | |
256 | ossl_ackm_on_pkt_space_discarded(ch->ackm, pn_space); | |
257 | ||
258 | ossl_quic_tx_packetiser_free(ch->txp); | |
259 | ossl_quic_txpim_free(ch->txpim); | |
260 | ossl_quic_cfq_free(ch->cfq); | |
261 | ossl_qtx_free(ch->qtx); | |
262 | if (ch->cc_data != NULL) | |
263 | ch->cc_method->free(ch->cc_data); | |
264 | if (ch->have_statm) | |
265 | ossl_statm_destroy(&ch->statm); | |
266 | ossl_ackm_free(ch->ackm); | |
267 | ||
268 | if (ch->stream0 != NULL) { | |
269 | assert(ch->have_qsm); | |
270 | ossl_quic_stream_map_release(&ch->qsm, ch->stream0); /* frees sstream */ | |
271 | } | |
272 | ||
273 | if (ch->have_qsm) | |
274 | ossl_quic_stream_map_cleanup(&ch->qsm); | |
275 | ||
276 | for (pn_space = QUIC_PN_SPACE_INITIAL; pn_space < QUIC_PN_SPACE_NUM; ++pn_space) { | |
277 | ossl_quic_sstream_free(ch->crypto_send[pn_space]); | |
278 | ossl_quic_rstream_free(ch->crypto_recv[pn_space]); | |
279 | } | |
280 | ||
281 | ossl_qrx_pkt_release(ch->qrx_pkt); | |
282 | ch->qrx_pkt = NULL; | |
283 | ||
284 | ossl_quic_dhs_free(ch->dhs); | |
285 | ossl_qrx_free(ch->qrx); | |
286 | ossl_quic_demux_free(ch->demux); | |
287 | OPENSSL_free(ch->local_transport_params); | |
f538b421 HL |
288 | } |
289 | ||
290 | QUIC_CHANNEL *ossl_quic_channel_new(const QUIC_CHANNEL_ARGS *args) | |
291 | { | |
292 | QUIC_CHANNEL *ch = NULL; | |
293 | ||
294 | if ((ch = OPENSSL_zalloc(sizeof(*ch))) == NULL) | |
295 | return NULL; | |
296 | ||
297 | ch->libctx = args->libctx; | |
298 | ch->propq = args->propq; | |
299 | ch->is_server = args->is_server; | |
300 | ||
301 | if (!ch_init(ch)) { | |
302 | OPENSSL_free(ch); | |
303 | return NULL; | |
304 | } | |
305 | ||
306 | return ch; | |
307 | } | |
308 | ||
309 | void ossl_quic_channel_free(QUIC_CHANNEL *ch) | |
310 | { | |
311 | if (ch == NULL) | |
312 | return; | |
313 | ||
314 | ch_cleanup(ch); | |
315 | OPENSSL_free(ch); | |
316 | } | |
317 | ||
318 | int ossl_quic_channel_get_peer_addr(QUIC_CHANNEL *ch, BIO_ADDR *peer_addr) | |
319 | { | |
320 | *peer_addr = ch->cur_peer_addr; | |
321 | return 1; | |
322 | } | |
323 | ||
324 | int ossl_quic_channel_set_peer_addr(QUIC_CHANNEL *ch, const BIO_ADDR *peer_addr) | |
325 | { | |
326 | ch->cur_peer_addr = *peer_addr; | |
327 | return 1; | |
328 | } | |
329 | ||
330 | QUIC_REACTOR *ossl_quic_channel_get_reactor(QUIC_CHANNEL *ch) | |
331 | { | |
332 | return &ch->rtor; | |
333 | } | |
334 | ||
335 | QUIC_STREAM_MAP *ossl_quic_channel_get_qsm(QUIC_CHANNEL *ch) | |
336 | { | |
337 | return &ch->qsm; | |
338 | } | |
339 | ||
340 | OSSL_STATM *ossl_quic_channel_get_statm(QUIC_CHANNEL *ch) | |
341 | { | |
342 | return &ch->statm; | |
343 | } | |
344 | ||
345 | QUIC_STREAM *ossl_quic_channel_get_stream_by_id(QUIC_CHANNEL *ch, | |
346 | uint64_t stream_id) | |
347 | { | |
348 | return ossl_quic_stream_map_get_by_id(&ch->qsm, stream_id); | |
349 | } | |
350 | ||
351 | int ossl_quic_channel_is_active(const QUIC_CHANNEL *ch) | |
352 | { | |
353 | return ch != NULL && ch->state == QUIC_CHANNEL_STATE_ACTIVE; | |
354 | } | |
355 | ||
356 | int ossl_quic_channel_is_terminating(const QUIC_CHANNEL *ch) | |
357 | { | |
358 | return ch->state == QUIC_CHANNEL_STATE_TERMINATING_CLOSING | |
359 | || ch->state == QUIC_CHANNEL_STATE_TERMINATING_DRAINING; | |
360 | } | |
361 | ||
362 | int ossl_quic_channel_is_terminated(const QUIC_CHANNEL *ch) | |
363 | { | |
364 | return ch->state == QUIC_CHANNEL_STATE_TERMINATED; | |
365 | } | |
366 | ||
367 | int ossl_quic_channel_is_term_any(const QUIC_CHANNEL *ch) | |
368 | { | |
369 | return ossl_quic_channel_is_terminating(ch) | |
370 | || ossl_quic_channel_is_terminated(ch); | |
371 | } | |
372 | ||
373 | int ossl_quic_channel_is_handshake_complete(const QUIC_CHANNEL *ch) | |
374 | { | |
375 | return ch->handshake_complete; | |
376 | } | |
377 | ||
378 | /* | |
379 | * QUIC Channel: Callbacks from Miscellaneous Subsidiary Components | |
380 | * ================================================================ | |
381 | */ | |
382 | ||
383 | /* Used by various components. */ | |
384 | static OSSL_TIME get_time(void *arg) | |
385 | { | |
386 | return ossl_time_now(); | |
387 | } | |
388 | ||
389 | /* Used by QSM. */ | |
390 | static uint64_t get_stream_limit(int uni, void *arg) | |
391 | { | |
392 | QUIC_CHANNEL *ch = arg; | |
393 | ||
394 | return uni ? ch->max_local_streams_uni : ch->max_local_streams_bidi; | |
395 | } | |
396 | ||
397 | /* | |
398 | * Called by QRX to determine if a packet is potentially invalid before trying | |
399 | * to decrypt it. | |
400 | */ | |
401 | static int rx_early_validate(QUIC_PN pn, int pn_space, void *arg) | |
402 | { | |
403 | QUIC_CHANNEL *ch = arg; | |
404 | ||
405 | /* Potential duplicates should not be processed. */ | |
406 | if (!ossl_ackm_is_rx_pn_processable(ch->ackm, pn, pn_space)) | |
407 | return 0; | |
408 | ||
409 | return 1; | |
410 | } | |
411 | ||
412 | /* | |
413 | * QUIC Channel: Handshake Layer Event Handling | |
414 | * ============================================ | |
415 | */ | |
416 | static int ch_on_crypto_send(const unsigned char *buf, size_t buf_len, | |
417 | size_t *consumed, void *arg) | |
418 | { | |
419 | int ret; | |
420 | QUIC_CHANNEL *ch = arg; | |
421 | uint32_t enc_level = ch->tx_enc_level; | |
422 | uint32_t pn_space = ossl_quic_enc_level_to_pn_space(enc_level); | |
423 | QUIC_SSTREAM *sstream = ch->crypto_send[pn_space]; | |
424 | ||
425 | if (!ossl_assert(sstream != NULL)) | |
426 | return 0; | |
427 | ||
428 | ret = ossl_quic_sstream_append(sstream, buf, buf_len, consumed); | |
429 | return ret; | |
430 | } | |
431 | ||
432 | static int crypto_ensure_empty(QUIC_RSTREAM *rstream) | |
433 | { | |
434 | size_t avail = 0; | |
435 | int is_fin = 0; | |
436 | ||
437 | if (rstream == NULL) | |
438 | return 1; | |
439 | ||
440 | if (!ossl_quic_rstream_available(rstream, &avail, &is_fin)) | |
441 | return 0; | |
442 | ||
443 | return avail == 0; | |
444 | } | |
445 | ||
446 | static int ch_on_crypto_recv(unsigned char *buf, size_t buf_len, | |
447 | size_t *bytes_read, void *arg) | |
448 | { | |
449 | QUIC_CHANNEL *ch = arg; | |
450 | QUIC_RSTREAM *rstream; | |
451 | int is_fin = 0; /* crypto stream is never finished, so we don't use this */ | |
452 | uint32_t i; | |
453 | ||
454 | /* | |
455 | * After we move to a later EL we must not allow our peer to send any new | |
456 | * bytes in the crypto stream on a previous EL. Retransmissions of old bytes | |
457 | * are allowed. | |
458 | * | |
459 | * In practice we will only move to a new EL when we have consumed all bytes | |
460 | * which should be sent on the crypto stream at a previous EL. For example, | |
461 | * the Handshake EL should not be provisioned until we have completely | |
462 | * consumed a TLS 1.3 ServerHello. Thus when we provision an EL the output | |
463 | * of ossl_quic_rstream_available() should be 0 for all lower ELs. Thus if a | |
464 | * given EL is available we simply ensure we have not received any further | |
465 | * bytes at a lower EL. | |
466 | */ | |
45ecfc9b | 467 | for (i = QUIC_ENC_LEVEL_INITIAL; i < ch->rx_enc_level; ++i) |
f538b421 HL |
468 | if (i != QUIC_ENC_LEVEL_0RTT && |
469 | !crypto_ensure_empty(ch->crypto_recv[ossl_quic_enc_level_to_pn_space(i)])) { | |
470 | /* Protocol violation (RFC 9001 s. 4.1.3) */ | |
471 | ossl_quic_channel_raise_protocol_error(ch, QUIC_ERR_PROTOCOL_VIOLATION, | |
472 | OSSL_QUIC_FRAME_TYPE_CRYPTO, | |
473 | "crypto stream data in wrong EL"); | |
474 | return 0; | |
475 | } | |
476 | ||
45ecfc9b | 477 | rstream = ch->crypto_recv[ossl_quic_enc_level_to_pn_space(ch->rx_enc_level)]; |
f538b421 HL |
478 | if (rstream == NULL) |
479 | return 0; | |
480 | ||
481 | return ossl_quic_rstream_read(rstream, buf, buf_len, bytes_read, | |
482 | &is_fin); | |
483 | } | |
484 | ||
485 | static int ch_on_handshake_yield_secret(uint32_t enc_level, int direction, | |
486 | uint32_t suite_id, EVP_MD *md, | |
487 | const unsigned char *secret, | |
488 | size_t secret_len, | |
489 | void *arg) | |
490 | { | |
491 | QUIC_CHANNEL *ch = arg; | |
492 | uint32_t i; | |
493 | ||
494 | if (enc_level < QUIC_ENC_LEVEL_HANDSHAKE || enc_level >= QUIC_ENC_LEVEL_NUM) | |
495 | /* Invalid EL. */ | |
496 | return 0; | |
497 | ||
f538b421 HL |
498 | |
499 | if (direction) { | |
500 | /* TX */ | |
45ecfc9b MC |
501 | if (enc_level <= ch->tx_enc_level) |
502 | /* | |
503 | * Does not make sense for us to try and provision an EL we have already | |
504 | * attained. | |
505 | */ | |
506 | return 0; | |
507 | ||
f538b421 HL |
508 | if (!ossl_qtx_provide_secret(ch->qtx, enc_level, |
509 | suite_id, md, | |
510 | secret, secret_len)) | |
511 | return 0; | |
512 | ||
513 | ch->tx_enc_level = enc_level; | |
514 | } else { | |
515 | /* RX */ | |
45ecfc9b MC |
516 | if (enc_level <= ch->rx_enc_level) |
517 | /* | |
518 | * Does not make sense for us to try and provision an EL we have already | |
519 | * attained. | |
520 | */ | |
521 | return 0; | |
522 | ||
523 | /* | |
524 | * Ensure all crypto streams for previous ELs are now empty of available | |
525 | * data. | |
526 | */ | |
527 | for (i = QUIC_ENC_LEVEL_INITIAL; i < enc_level; ++i) | |
e28f512f | 528 | if (!crypto_ensure_empty(ch->crypto_recv[ossl_quic_enc_level_to_pn_space(i)])) { |
45ecfc9b MC |
529 | /* Protocol violation (RFC 9001 s. 4.1.3) */ |
530 | ossl_quic_channel_raise_protocol_error(ch, QUIC_ERR_PROTOCOL_VIOLATION, | |
531 | OSSL_QUIC_FRAME_TYPE_CRYPTO, | |
532 | "crypto stream data in wrong EL"); | |
533 | return 0; | |
534 | } | |
535 | ||
f538b421 HL |
536 | if (!ossl_qrx_provide_secret(ch->qrx, enc_level, |
537 | suite_id, md, | |
538 | secret, secret_len)) | |
539 | return 0; | |
92282a17 HL |
540 | |
541 | ch->have_new_rx_secret = 1; | |
45ecfc9b | 542 | ch->rx_enc_level = enc_level; |
f538b421 HL |
543 | } |
544 | ||
545 | return 1; | |
546 | } | |
547 | ||
548 | static int ch_on_handshake_complete(void *arg) | |
549 | { | |
550 | QUIC_CHANNEL *ch = arg; | |
551 | ||
e28f512f | 552 | if (!ossl_assert(!ch->handshake_complete)) |
f538b421 HL |
553 | return 0; /* this should not happen twice */ |
554 | ||
555 | if (!ossl_assert(ch->tx_enc_level == QUIC_ENC_LEVEL_1RTT)) | |
556 | return 0; | |
557 | ||
558 | if (!ch->got_remote_transport_params) | |
559 | /* | |
560 | * Was not a valid QUIC handshake if we did not get valid transport | |
561 | * params. | |
562 | */ | |
563 | return 0; | |
564 | ||
565 | /* Don't need transport parameters anymore. */ | |
566 | OPENSSL_free(ch->local_transport_params); | |
567 | ch->local_transport_params = NULL; | |
568 | ||
569 | /* Tell TXP the handshake is complete. */ | |
570 | ossl_quic_tx_packetiser_notify_handshake_complete(ch->txp); | |
571 | ||
572 | ch->handshake_complete = 1; | |
573 | return 1; | |
574 | } | |
575 | ||
576 | static int ch_on_handshake_alert(void *arg, unsigned char alert_code) | |
577 | { | |
578 | QUIC_CHANNEL *ch = arg; | |
579 | ||
580 | ossl_quic_channel_raise_protocol_error(ch, QUIC_ERR_CRYPTO_ERR_BEGIN + alert_code, | |
581 | 0, "handshake alert"); | |
582 | return 1; | |
583 | } | |
584 | ||
585 | /* | |
586 | * QUIC Channel: Transport Parameter Handling | |
587 | * ========================================== | |
588 | */ | |
589 | ||
590 | /* | |
591 | * Called by handshake layer when we receive QUIC Transport Parameters from the | |
592 | * peer. Note that these are not authenticated until the handshake is marked | |
593 | * as complete. | |
594 | */ | |
595 | static int ch_on_transport_params(const unsigned char *params, | |
596 | size_t params_len, | |
597 | void *arg) | |
598 | { | |
599 | QUIC_CHANNEL *ch = arg; | |
600 | PACKET pkt; | |
601 | uint64_t id, v; | |
602 | size_t len; | |
603 | const unsigned char *body; | |
604 | int got_orig_dcid = 0; | |
605 | int got_initial_scid = 0; | |
606 | int got_retry_scid = 0; | |
607 | int got_initial_max_data = 0; | |
608 | int got_initial_max_stream_data_bidi_local = 0; | |
609 | int got_initial_max_stream_data_bidi_remote = 0; | |
610 | int got_initial_max_stream_data_uni = 0; | |
611 | int got_initial_max_streams_bidi = 0; | |
612 | int got_initial_max_streams_uni = 0; | |
613 | int got_ack_delay_exp = 0; | |
614 | int got_max_ack_delay = 0; | |
615 | int got_max_udp_payload_size = 0; | |
616 | int got_max_idle_timeout = 0; | |
617 | int got_active_conn_id_limit = 0; | |
618 | QUIC_CONN_ID cid; | |
619 | ||
620 | if (ch->got_remote_transport_params) | |
621 | goto malformed; | |
622 | ||
623 | if (!PACKET_buf_init(&pkt, params, params_len)) | |
624 | return 0; | |
625 | ||
626 | while (PACKET_remaining(&pkt) > 0) { | |
627 | if (!ossl_quic_wire_peek_transport_param(&pkt, &id)) | |
628 | goto malformed; | |
629 | ||
630 | switch (id) { | |
631 | case QUIC_TPARAM_ORIG_DCID: | |
632 | if (got_orig_dcid) | |
633 | /* must not appear more than once */ | |
634 | goto malformed; | |
635 | ||
636 | if (!ossl_quic_wire_decode_transport_param_cid(&pkt, NULL, &cid)) | |
637 | goto malformed; | |
638 | ||
639 | /* Must match our initial DCID. */ | |
640 | if (!ossl_quic_conn_id_eq(&ch->init_dcid, &cid)) | |
641 | goto malformed; | |
642 | ||
643 | got_orig_dcid = 1; | |
644 | break; | |
645 | ||
646 | case QUIC_TPARAM_RETRY_SCID: | |
647 | if (got_retry_scid || !ch->doing_retry) | |
648 | /* must not appear more than once or if retry not done */ | |
649 | goto malformed; | |
650 | ||
651 | if (!ossl_quic_wire_decode_transport_param_cid(&pkt, NULL, &cid)) | |
652 | goto malformed; | |
653 | ||
654 | /* Must match Retry packet SCID. */ | |
655 | if (!ossl_quic_conn_id_eq(&ch->retry_scid, &cid)) | |
656 | goto malformed; | |
657 | ||
658 | got_retry_scid = 1; | |
659 | break; | |
660 | ||
661 | case QUIC_TPARAM_INITIAL_SCID: | |
662 | if (got_initial_scid) | |
663 | /* must not appear more than once */ | |
664 | goto malformed; | |
665 | ||
666 | if (!ossl_quic_wire_decode_transport_param_cid(&pkt, NULL, &cid)) | |
667 | goto malformed; | |
668 | ||
669 | /* Must match SCID of first Initial packet from server. */ | |
670 | if (!ossl_quic_conn_id_eq(&ch->init_scid, &cid)) | |
671 | goto malformed; | |
672 | ||
673 | got_initial_scid = 1; | |
674 | break; | |
675 | ||
676 | case QUIC_TPARAM_INITIAL_MAX_DATA: | |
677 | if (got_initial_max_data) | |
678 | /* must not appear more than once */ | |
679 | goto malformed; | |
680 | ||
681 | if (!ossl_quic_wire_decode_transport_param_int(&pkt, &id, &v)) | |
682 | goto malformed; | |
683 | ||
684 | ossl_quic_txfc_bump_cwm(&ch->conn_txfc, v); | |
685 | got_initial_max_data = 1; | |
686 | break; | |
687 | ||
688 | case QUIC_TPARAM_INITIAL_MAX_STREAM_DATA_BIDI_LOCAL: | |
689 | if (got_initial_max_stream_data_bidi_local) | |
690 | /* must not appear more than once */ | |
691 | goto malformed; | |
692 | ||
693 | if (!ossl_quic_wire_decode_transport_param_int(&pkt, &id, &v)) | |
694 | goto malformed; | |
695 | ||
696 | /* | |
697 | * This is correct; the BIDI_LOCAL TP governs streams created by | |
698 | * the endpoint which sends the TP, i.e., our peer. | |
699 | */ | |
700 | ch->init_max_stream_data_bidi_remote = v; | |
701 | got_initial_max_stream_data_bidi_local = 1; | |
702 | break; | |
703 | ||
704 | case QUIC_TPARAM_INITIAL_MAX_STREAM_DATA_BIDI_REMOTE: | |
705 | if (got_initial_max_stream_data_bidi_remote) | |
706 | /* must not appear more than once */ | |
707 | goto malformed; | |
708 | ||
709 | if (!ossl_quic_wire_decode_transport_param_int(&pkt, &id, &v)) | |
710 | goto malformed; | |
711 | ||
712 | /* | |
713 | * This is correct; the BIDI_REMOTE TP governs streams created | |
714 | * by the endpoint which receives the TP, i.e., us. | |
715 | */ | |
716 | ch->init_max_stream_data_bidi_local = v; | |
717 | ||
718 | /* Apply to stream 0. */ | |
719 | ossl_quic_txfc_bump_cwm(&ch->stream0->txfc, v); | |
720 | got_initial_max_stream_data_bidi_remote = 1; | |
721 | break; | |
722 | ||
723 | case QUIC_TPARAM_INITIAL_MAX_STREAM_DATA_UNI: | |
724 | if (got_initial_max_stream_data_uni) | |
725 | /* must not appear more than once */ | |
726 | goto malformed; | |
727 | ||
728 | if (!ossl_quic_wire_decode_transport_param_int(&pkt, &id, &v)) | |
729 | goto malformed; | |
730 | ||
731 | ch->init_max_stream_data_uni_remote = v; | |
732 | got_initial_max_stream_data_uni = 1; | |
733 | break; | |
734 | ||
735 | case QUIC_TPARAM_ACK_DELAY_EXP: | |
736 | if (got_ack_delay_exp) | |
737 | /* must not appear more than once */ | |
738 | goto malformed; | |
739 | ||
740 | if (!ossl_quic_wire_decode_transport_param_int(&pkt, &id, &v) | |
741 | || v > QUIC_MAX_ACK_DELAY_EXP) | |
742 | goto malformed; | |
743 | ||
744 | ch->rx_ack_delay_exp = (unsigned char)v; | |
745 | got_ack_delay_exp = 1; | |
746 | break; | |
747 | ||
748 | case QUIC_TPARAM_MAX_ACK_DELAY: | |
749 | if (got_max_ack_delay) | |
750 | /* must not appear more than once */ | |
751 | return 0; | |
752 | ||
753 | if (!ossl_quic_wire_decode_transport_param_int(&pkt, &id, &v) | |
754 | || v >= (((uint64_t)1) << 14)) | |
755 | goto malformed; | |
756 | ||
757 | ch->rx_max_ack_delay = v; | |
758 | got_max_ack_delay = 1; | |
759 | break; | |
760 | ||
761 | case QUIC_TPARAM_INITIAL_MAX_STREAMS_BIDI: | |
762 | if (got_initial_max_streams_bidi) | |
763 | /* must not appear more than once */ | |
764 | return 0; | |
765 | ||
766 | if (!ossl_quic_wire_decode_transport_param_int(&pkt, &id, &v) | |
767 | || v > (((uint64_t)1) << 60)) | |
768 | goto malformed; | |
769 | ||
770 | assert(ch->max_local_streams_bidi == 0); | |
771 | ch->max_local_streams_bidi = v; | |
772 | got_initial_max_streams_bidi = 1; | |
773 | break; | |
774 | ||
775 | case QUIC_TPARAM_INITIAL_MAX_STREAMS_UNI: | |
776 | if (got_initial_max_streams_uni) | |
777 | /* must not appear more than once */ | |
778 | goto malformed; | |
779 | ||
780 | if (!ossl_quic_wire_decode_transport_param_int(&pkt, &id, &v) | |
781 | || v > (((uint64_t)1) << 60)) | |
782 | goto malformed; | |
783 | ||
784 | assert(ch->max_local_streams_uni == 0); | |
785 | ch->max_local_streams_uni = v; | |
786 | got_initial_max_streams_uni = 1; | |
787 | break; | |
788 | ||
789 | case QUIC_TPARAM_MAX_IDLE_TIMEOUT: | |
790 | if (got_max_idle_timeout) | |
791 | /* must not appear more than once */ | |
792 | goto malformed; | |
793 | ||
794 | if (!ossl_quic_wire_decode_transport_param_int(&pkt, &id, &v)) | |
795 | goto malformed; | |
796 | ||
797 | if (v < ch->max_idle_timeout) | |
798 | ch->max_idle_timeout = v; | |
799 | ||
800 | ch_update_idle(ch); | |
801 | got_max_idle_timeout = 1; | |
802 | break; | |
803 | ||
804 | case QUIC_TPARAM_MAX_UDP_PAYLOAD_SIZE: | |
805 | if (got_max_udp_payload_size) | |
806 | /* must not appear more than once */ | |
807 | goto malformed; | |
808 | ||
809 | if (!ossl_quic_wire_decode_transport_param_int(&pkt, &id, &v) | |
810 | || v < QUIC_MIN_INITIAL_DGRAM_LEN) | |
811 | goto malformed; | |
812 | ||
813 | ch->rx_max_udp_payload_size = v; | |
814 | got_max_udp_payload_size = 1; | |
815 | break; | |
816 | ||
817 | case QUIC_TPARAM_ACTIVE_CONN_ID_LIMIT: | |
818 | if (got_active_conn_id_limit) | |
819 | /* must not appear more than once */ | |
820 | goto malformed; | |
821 | ||
822 | if (!ossl_quic_wire_decode_transport_param_int(&pkt, &id, &v) | |
823 | || v < QUIC_MIN_ACTIVE_CONN_ID_LIMIT) | |
824 | goto malformed; | |
825 | ||
826 | ch->rx_active_conn_id_limit = v; | |
827 | got_active_conn_id_limit = 1; | |
828 | break; | |
829 | ||
830 | /* | |
831 | * TODO(QUIC): Handle: | |
832 | * QUIC_TPARAM_STATELESS_RESET_TOKEN | |
833 | * QUIC_TPARAM_PREFERRED_ADDR | |
834 | */ | |
835 | ||
836 | case QUIC_TPARAM_DISABLE_ACTIVE_MIGRATION: | |
837 | /* We do not currently handle migration, so nothing to do. */ | |
838 | default: | |
839 | /* Skip over and ignore. */ | |
840 | body = ossl_quic_wire_decode_transport_param_bytes(&pkt, &id, | |
841 | &len); | |
842 | if (body == NULL) | |
843 | goto malformed; | |
844 | ||
845 | break; | |
846 | } | |
847 | } | |
848 | ||
849 | if (!got_orig_dcid || !got_initial_scid || got_retry_scid != ch->doing_retry) | |
850 | /* Transport parameters were not valid. */ | |
851 | goto malformed; | |
852 | ||
853 | ch->got_remote_transport_params = 1; | |
854 | ||
855 | if (got_initial_max_data || got_initial_max_stream_data_bidi_remote | |
856 | || got_initial_max_streams_bidi || got_initial_max_streams_uni) | |
857 | /* If FC credit was bumped, we may now be able to send. */ | |
858 | ossl_quic_stream_map_update_state(&ch->qsm, ch->stream0); | |
859 | ||
860 | /* If we are a server, we now generate our own transport parameters. */ | |
861 | if (ch->is_server && !ch_generate_transport_params(ch)) { | |
862 | ossl_quic_channel_raise_protocol_error(ch, QUIC_ERR_INTERNAL_ERROR, 0, | |
863 | "internal error"); | |
864 | return 0; | |
865 | } | |
866 | ||
867 | return 1; | |
868 | ||
869 | malformed: | |
870 | ossl_quic_channel_raise_protocol_error(ch, QUIC_ERR_TRANSPORT_PARAMETER_ERROR, | |
871 | 0, "bad transport parameter"); | |
872 | return 0; | |
873 | } | |
874 | ||
875 | /* | |
876 | * Called when we want to generate transport parameters. This is called | |
877 | * immediately at instantiation time for a client and after we receive the | |
878 | * client's transport parameters for a server. | |
879 | */ | |
880 | static int ch_generate_transport_params(QUIC_CHANNEL *ch) | |
881 | { | |
882 | int ok = 0; | |
883 | BUF_MEM *buf_mem = NULL; | |
884 | WPACKET wpkt; | |
885 | int wpkt_valid = 0; | |
886 | size_t buf_len = 0; | |
887 | ||
888 | if (ch->local_transport_params != NULL) | |
889 | goto err; | |
890 | ||
891 | if ((buf_mem = BUF_MEM_new()) == NULL) | |
892 | goto err; | |
893 | ||
894 | if (!WPACKET_init(&wpkt, buf_mem)) | |
895 | goto err; | |
896 | ||
897 | wpkt_valid = 1; | |
898 | ||
899 | if (ossl_quic_wire_encode_transport_param_bytes(&wpkt, QUIC_TPARAM_DISABLE_ACTIVE_MIGRATION, | |
900 | NULL, 0) == NULL) | |
901 | goto err; | |
902 | ||
903 | if (ossl_quic_wire_encode_transport_param_bytes(&wpkt, QUIC_TPARAM_INITIAL_SCID, | |
904 | NULL, 0) == NULL) | |
905 | goto err; | |
906 | ||
907 | if (!ossl_quic_wire_encode_transport_param_int(&wpkt, QUIC_TPARAM_MAX_IDLE_TIMEOUT, | |
908 | ch->max_idle_timeout)) | |
909 | goto err; | |
910 | ||
911 | if (!ossl_quic_wire_encode_transport_param_int(&wpkt, QUIC_TPARAM_MAX_UDP_PAYLOAD_SIZE, | |
912 | QUIC_MIN_INITIAL_DGRAM_LEN)) | |
913 | goto err; | |
914 | ||
915 | if (!ossl_quic_wire_encode_transport_param_int(&wpkt, QUIC_TPARAM_ACTIVE_CONN_ID_LIMIT, | |
916 | 4)) | |
917 | goto err; | |
918 | ||
919 | if (!ossl_quic_wire_encode_transport_param_int(&wpkt, QUIC_TPARAM_INITIAL_MAX_DATA, | |
920 | ossl_quic_rxfc_get_cwm(&ch->conn_rxfc))) | |
921 | goto err; | |
922 | ||
923 | /* | |
924 | * We actually want the default CWM for a new RXFC, but here we just use | |
925 | * stream0 as a representative specimen. TODO(QUIC): revisit this when we | |
926 | * support multiple streams. | |
927 | */ | |
928 | if (!ossl_quic_wire_encode_transport_param_int(&wpkt, QUIC_TPARAM_INITIAL_MAX_STREAM_DATA_BIDI_LOCAL, | |
929 | ossl_quic_rxfc_get_cwm(&ch->stream0->rxfc))) | |
930 | goto err; | |
931 | ||
932 | if (!ossl_quic_wire_encode_transport_param_int(&wpkt, QUIC_TPARAM_INITIAL_MAX_STREAM_DATA_BIDI_REMOTE, | |
933 | ossl_quic_rxfc_get_cwm(&ch->stream0->rxfc))) | |
934 | goto err; | |
935 | ||
936 | if (!ossl_quic_wire_encode_transport_param_int(&wpkt, QUIC_TPARAM_INITIAL_MAX_STREAM_DATA_UNI, | |
937 | ossl_quic_rxfc_get_cwm(&ch->stream0->rxfc))) | |
938 | goto err; | |
939 | ||
940 | if (!ossl_quic_wire_encode_transport_param_int(&wpkt, QUIC_TPARAM_INITIAL_MAX_STREAMS_BIDI, | |
941 | 0)) | |
942 | goto err; | |
943 | ||
944 | if (!ossl_quic_wire_encode_transport_param_int(&wpkt, QUIC_TPARAM_INITIAL_MAX_STREAMS_UNI, | |
945 | 0)) | |
946 | goto err; | |
947 | ||
948 | if (!WPACKET_get_total_written(&wpkt, &buf_len)) | |
949 | goto err; | |
950 | ||
951 | ch->local_transport_params = (unsigned char *)buf_mem->data; | |
952 | buf_mem->data = NULL; | |
953 | ||
954 | if (!WPACKET_finish(&wpkt)) | |
955 | goto err; | |
956 | ||
957 | wpkt_valid = 0; | |
958 | ||
959 | if (!ossl_quic_dhs_set_transport_params(ch->dhs, ch->local_transport_params, | |
960 | buf_len)) | |
961 | goto err; | |
962 | ||
963 | ok = 1; | |
964 | err: | |
965 | if (wpkt_valid) | |
966 | WPACKET_cleanup(&wpkt); | |
967 | BUF_MEM_free(buf_mem); | |
968 | return ok; | |
969 | } | |
970 | ||
971 | /* | |
972 | * QUIC Channel: Ticker-Mutator | |
973 | * ============================ | |
974 | */ | |
975 | ||
976 | /* | |
977 | * The central ticker function called by the reactor. This does everything, or | |
978 | * at least everything network I/O related. Best effort - not allowed to fail | |
979 | * "loudly". | |
980 | */ | |
981 | static void ch_tick(QUIC_TICK_RESULT *res, void *arg) | |
982 | { | |
983 | OSSL_TIME now, deadline; | |
984 | QUIC_CHANNEL *ch = arg; | |
985 | ||
986 | /* | |
987 | * When we tick the QUIC connection, we do everything we need to do | |
988 | * periodically. In order, we: | |
989 | * | |
990 | * - handle any incoming data from the network; | |
991 | * - handle any timer events which are due to fire (ACKM, etc.) | |
992 | * - write any data to the network due to be sent, to the extent | |
993 | * possible; | |
994 | * - determine the time at which we should next be ticked. | |
995 | */ | |
996 | ||
997 | /* If we are in the TERMINATED state, there is nothing to do. */ | |
998 | if (ossl_quic_channel_is_terminated(ch)) { | |
999 | res->want_net_read = 0; | |
1000 | res->want_net_write = 0; | |
1001 | res->tick_deadline = ossl_time_infinite(); | |
1002 | return; | |
1003 | } | |
1004 | ||
1005 | /* | |
1006 | * If we are in the TERMINATING state, check if the terminating timer has | |
1007 | * expired. | |
1008 | */ | |
1009 | if (ossl_quic_channel_is_terminating(ch)) { | |
1010 | now = ossl_time_now(); | |
1011 | ||
1012 | if (ossl_time_compare(now, ch->terminate_deadline) >= 0) { | |
1013 | ch_on_terminating_timeout(ch); | |
1014 | res->want_net_read = 0; | |
1015 | res->want_net_write = 0; | |
1016 | res->tick_deadline = ossl_time_infinite(); | |
1017 | return; /* abort normal processing, nothing to do */ | |
1018 | } | |
1019 | } | |
1020 | ||
3bf4dc8c HL |
1021 | /* Handle any incoming data from network. */ |
1022 | ch_rx_pre(ch); | |
1023 | ||
4e64437a | 1024 | do { |
3bf4dc8c | 1025 | /* Process queued incoming packets. */ |
4e64437a | 1026 | ch_rx(ch); |
f538b421 | 1027 | |
4e64437a HL |
1028 | /* |
1029 | * Allow the handshake layer to check for any new incoming data and generate | |
1030 | * new outgoing data. | |
1031 | */ | |
92282a17 | 1032 | ch->have_new_rx_secret = 0; |
4e64437a HL |
1033 | ossl_quic_dhs_tick(ch->dhs); |
1034 | ||
1035 | /* | |
1036 | * If the handshake layer gave us a new secret, we need to do RX again | |
1037 | * because packets that were not previously processable and were | |
1038 | * deferred might now be processable. | |
1039 | */ | |
92282a17 | 1040 | } while (ch->have_new_rx_secret); |
f538b421 HL |
1041 | |
1042 | /* | |
1043 | * Handle any timer events which are due to fire; namely, the loss detection | |
1044 | * deadline and the idle timeout. | |
1045 | * | |
1046 | * ACKM ACK generation deadline is polled by TXP, so we don't need to handle | |
1047 | * it here. | |
1048 | */ | |
1049 | now = ossl_time_now(); | |
1050 | if (ossl_time_compare(now, ch->idle_deadline) >= 0) { | |
1051 | /* | |
1052 | * Idle timeout differs from normal protocol violation because we do not | |
1053 | * send a CONN_CLOSE frame; go straight to TERMINATED. | |
1054 | */ | |
1055 | ch_on_idle_timeout(ch); | |
1056 | res->want_net_read = 0; | |
1057 | res->want_net_write = 0; | |
1058 | res->tick_deadline = ossl_time_infinite(); | |
1059 | return; | |
1060 | } | |
1061 | ||
1062 | deadline = ossl_ackm_get_loss_detection_deadline(ch->ackm); | |
1063 | if (!ossl_time_is_zero(deadline) && ossl_time_compare(now, deadline) >= 0) | |
1064 | ossl_ackm_on_timeout(ch->ackm); | |
1065 | ||
1066 | /* Write any data to the network due to be sent. */ | |
1067 | ch_tx(ch); | |
1068 | ||
1069 | /* Determine the time at which we should next be ticked. */ | |
1070 | res->tick_deadline = ch_determine_next_tick_deadline(ch); | |
1071 | ||
1072 | /* Always process network input. */ | |
1073 | res->want_net_read = 1; | |
1074 | ||
1075 | /* We want to write to the network if we have any in our queue. */ | |
1076 | res->want_net_write = (ossl_qtx_get_queue_len_datagrams(ch->qtx) > 0); | |
1077 | } | |
1078 | ||
3bf4dc8c HL |
1079 | /* Process incoming datagrams, if any. */ |
1080 | static void ch_rx_pre(QUIC_CHANNEL *ch) | |
1081 | { | |
1082 | if (!ch->have_sent_any_pkt) | |
1083 | return; | |
1084 | ||
1085 | /* | |
1086 | * Get DEMUX to BIO_recvmmsg from the network and queue incoming datagrams | |
1087 | * to the appropriate QRX instance. | |
1088 | */ | |
1089 | ossl_quic_demux_pump(ch->demux); /* best effort */ | |
1090 | } | |
1091 | ||
1092 | /* Process queued incoming packets and handle frames, if any. */ | |
f538b421 HL |
1093 | static int ch_rx(QUIC_CHANNEL *ch) |
1094 | { | |
1095 | int handled_any = 0; | |
1096 | ||
1097 | if (!ch->have_sent_any_pkt) | |
1098 | /* | |
1099 | * We have not sent anything yet, therefore there is no need to check | |
1100 | * for incoming data. TODO SERVER | |
1101 | */ | |
1102 | return 1; | |
1103 | ||
f538b421 HL |
1104 | for (;;) { |
1105 | assert(ch->qrx_pkt == NULL); | |
1106 | ||
1107 | if (!ossl_qrx_read_pkt(ch->qrx, &ch->qrx_pkt)) | |
1108 | break; | |
1109 | ||
1110 | if (!handled_any) | |
1111 | ch_update_idle(ch); | |
1112 | ||
1113 | ch_rx_handle_packet(ch); /* best effort */ | |
1114 | ||
1115 | /* | |
1116 | * Regardless of the outcome of frame handling, unref the packet. | |
1117 | * This will free the packet unless something added another | |
1118 | * reference to it during frame processing. | |
1119 | */ | |
1120 | ossl_qrx_pkt_release(ch->qrx_pkt); | |
1121 | ch->qrx_pkt = NULL; | |
1122 | ||
1123 | handled_any = 1; | |
1124 | } | |
1125 | ||
1126 | /* | |
1127 | * When in TERMINATING - CLOSING, generate a CONN_CLOSE frame whenever we | |
1128 | * process one or more incoming packets. | |
1129 | */ | |
1130 | if (handled_any && ch->state == QUIC_CHANNEL_STATE_TERMINATING_CLOSING) | |
1131 | ch->conn_close_queued = 1; | |
1132 | ||
1133 | return 1; | |
1134 | } | |
1135 | ||
1136 | /* Handles the packet currently in ch->qrx_pkt->hdr. */ | |
1137 | static void ch_rx_handle_packet(QUIC_CHANNEL *ch) | |
1138 | { | |
1139 | uint32_t enc_level; | |
1140 | ||
1141 | assert(ch->qrx_pkt != NULL); | |
1142 | ||
1143 | if (ossl_quic_pkt_type_is_encrypted(ch->qrx_pkt->hdr->type)) { | |
1144 | if (!ch->have_received_enc_pkt) { | |
1145 | ch->init_scid = ch->qrx_pkt->hdr->src_conn_id; | |
1146 | ch->have_received_enc_pkt = 1; | |
1147 | ||
1148 | /* | |
1149 | * We change to using the SCID in the first Initial packet as the | |
1150 | * DCID. | |
1151 | */ | |
1152 | ossl_quic_tx_packetiser_set_cur_dcid(ch->txp, &ch->init_scid); | |
1153 | } | |
1154 | ||
1155 | enc_level = ossl_quic_pkt_type_to_enc_level(ch->qrx_pkt->hdr->type); | |
1156 | if ((ch->el_discarded & (1U << enc_level)) != 0) | |
1157 | /* Do not process packets from ELs we have already discarded. */ | |
1158 | return; | |
1159 | } | |
1160 | ||
1161 | /* Handle incoming packet. */ | |
1162 | switch (ch->qrx_pkt->hdr->type) { | |
1163 | case QUIC_PKT_TYPE_RETRY: | |
1164 | if (ch->doing_retry) | |
1165 | /* It is not allowed to ask a client to do a retry more than | |
1166 | * once. */ | |
1167 | return; | |
1168 | ||
1169 | /* TODO if server */ | |
1170 | ||
1171 | if (ch->qrx_pkt->hdr->len <= QUIC_RETRY_INTEGRITY_TAG_LEN) | |
1172 | /* Packets with zero-length Retry Tokens are invalid. */ | |
1173 | return; | |
1174 | ||
1175 | /* | |
1176 | * TODO(QUIC): Theoretically this should probably be in the QRX. | |
1177 | * However because validation is dependent on context (namely the | |
1178 | * client's initial DCID) we can't do this cleanly. In the future we | |
1179 | * should probably add a callback to the QRX to let it call us (via | |
1180 | * the DEMUX) and ask us about the correct original DCID, rather | |
1181 | * than allow the QRX to emit a potentially malformed packet to the | |
1182 | * upper layers. However, special casing this will do for now. | |
1183 | */ | |
1184 | if (!ossl_quic_validate_retry_integrity_tag(ch->libctx, | |
1185 | ch->propq, | |
1186 | ch->qrx_pkt->hdr, | |
1187 | &ch->init_dcid)) | |
1188 | /* Malformed retry packet, ignore. */ | |
1189 | return; | |
1190 | ||
1191 | ch_retry(ch, ch->qrx_pkt->hdr->data, | |
1192 | ch->qrx_pkt->hdr->len - QUIC_RETRY_INTEGRITY_TAG_LEN, | |
1193 | &ch->qrx_pkt->hdr->src_conn_id); | |
1194 | break; | |
1195 | ||
1196 | case QUIC_PKT_TYPE_VERSION_NEG: | |
1197 | /* TODO(QUIC): Implement version negotiation */ | |
1198 | break; | |
1199 | ||
1200 | case QUIC_PKT_TYPE_0RTT: | |
1201 | /* TODO if server */ | |
1202 | /* Clients should never receive 0-RTT packets */ | |
1203 | break; | |
1204 | ||
1205 | default: | |
1206 | if (ch->qrx_pkt->hdr->type == QUIC_PKT_TYPE_HANDSHAKE) | |
1207 | /* | |
1208 | * We automatically drop INITIAL EL keys when first successfully | |
1209 | * decrypting a HANDSHAKE packet, as per the RFC. | |
1210 | */ | |
1211 | ch_discard_el(ch, QUIC_ENC_LEVEL_INITIAL); | |
1212 | ||
1213 | /* This packet contains frames, pass to the RXDP. */ | |
1214 | ossl_quic_handle_frames(ch, ch->qrx_pkt); /* best effort */ | |
1215 | break; | |
1216 | } | |
1217 | } | |
1218 | ||
1219 | /* Try to generate packets and if possible, flush them to the network. */ | |
1220 | static int ch_tx(QUIC_CHANNEL *ch) | |
1221 | { | |
1222 | if (ch->state == QUIC_CHANNEL_STATE_TERMINATING_CLOSING) { | |
1223 | /* | |
1224 | * While closing, only send CONN_CLOSE if we've received more traffic | |
1225 | * from the peer. Once we tell the TXP to generate CONN_CLOSE, all | |
1226 | * future calls to it generate CONN_CLOSE frames, so otherwise we would | |
1227 | * just constantly generate CONN_CLOSE frames. | |
1228 | */ | |
1229 | if (!ch->conn_close_queued) | |
1230 | return 0; | |
1231 | ||
1232 | ch->conn_close_queued = 0; | |
1233 | } | |
1234 | ||
1235 | /* | |
1236 | * Send a packet, if we need to. Best effort. The TXP consults the CC and | |
1237 | * applies any limitations imposed by it, so we don't need to do it here. | |
1238 | * | |
1239 | * Best effort. In particular if TXP fails for some reason we should still | |
1240 | * flush any queued packets which we already generated. | |
1241 | */ | |
1242 | if (ossl_quic_tx_packetiser_generate(ch->txp, | |
1243 | TX_PACKETISER_ARCHETYPE_NORMAL) | |
1244 | == TX_PACKETISER_RES_SENT_PKT) | |
1245 | ch->have_sent_any_pkt = 1; | |
1246 | ||
1247 | ossl_qtx_flush_net(ch->qtx); /* best effort */ | |
1248 | return 1; | |
1249 | } | |
1250 | ||
1251 | /* Determine next tick deadline. */ | |
1252 | static OSSL_TIME ch_determine_next_tick_deadline(QUIC_CHANNEL *ch) | |
1253 | { | |
1254 | OSSL_TIME deadline; | |
1255 | uint32_t pn_space; | |
1256 | ||
1257 | deadline = ossl_ackm_get_loss_detection_deadline(ch->ackm); | |
1258 | if (ossl_time_is_zero(deadline)) | |
1259 | deadline = ossl_time_infinite(); | |
1260 | ||
1261 | for (pn_space = QUIC_PN_SPACE_INITIAL; pn_space < QUIC_PN_SPACE_NUM; ++pn_space) | |
1262 | deadline = ossl_time_min(deadline, | |
1263 | ossl_ackm_get_ack_deadline(ch->ackm, pn_space)); | |
1264 | ||
1265 | /* When will CC let us send more? */ | |
1266 | if (ossl_quic_tx_packetiser_has_pending(ch->txp, TX_PACKETISER_ARCHETYPE_NORMAL, | |
1267 | TX_PACKETISER_BYPASS_CC)) | |
1268 | deadline = ossl_time_min(deadline, | |
1269 | ch->cc_method->get_next_credit_time(ch->cc_data)); | |
1270 | ||
1271 | /* Is the terminating timer armed? */ | |
1272 | if (ossl_quic_channel_is_terminating(ch)) | |
1273 | deadline = ossl_time_min(deadline, | |
1274 | ch->terminate_deadline); | |
1275 | else if (!ossl_time_is_infinite(ch->idle_deadline)) | |
1276 | deadline = ossl_time_min(deadline, | |
1277 | ch->idle_deadline); | |
1278 | ||
1279 | return deadline; | |
1280 | } | |
1281 | ||
1282 | /* | |
1283 | * QUIC Channel: Network BIO Configuration | |
1284 | * ======================================= | |
1285 | */ | |
1286 | ||
1287 | /* Determines whether we can support a given poll descriptor. */ | |
1288 | static int validate_poll_descriptor(const BIO_POLL_DESCRIPTOR *d) | |
1289 | { | |
1290 | if (d->type == BIO_POLL_DESCRIPTOR_TYPE_SOCK_FD && d->value.fd < 0) | |
1291 | return 0; | |
1292 | ||
1293 | return 1; | |
1294 | } | |
1295 | ||
1296 | BIO *ossl_quic_channel_get_net_rbio(QUIC_CHANNEL *ch) | |
1297 | { | |
1298 | return ch->net_rbio; | |
1299 | } | |
1300 | ||
1301 | BIO *ossl_quic_channel_get_net_wbio(QUIC_CHANNEL *ch) | |
1302 | { | |
1303 | return ch->net_wbio; | |
1304 | } | |
1305 | ||
d1ac77b1 HL |
1306 | /* |
1307 | * QUIC_CHANNEL does not ref any BIO it is provided with, nor is any ref | |
1308 | * transferred to it. The caller (i.e., QUIC_CONNECTION) is responsible for | |
1309 | * ensuring the BIO lasts until the channel is freed or the BIO is switched out | |
1310 | * for another BIO by a subsequent successful call to this function. | |
1311 | */ | |
1312 | int ossl_quic_channel_set_net_rbio(QUIC_CHANNEL *ch, BIO *net_rbio) | |
f538b421 HL |
1313 | { |
1314 | BIO_POLL_DESCRIPTOR d = {0}; | |
1315 | ||
1316 | if (ch->net_rbio == net_rbio) | |
1317 | return 1; | |
1318 | ||
1319 | if (net_rbio != NULL) { | |
1320 | if (!BIO_get_rpoll_descriptor(net_rbio, &d)) | |
1321 | /* Non-pollable BIO */ | |
1322 | d.type = BIO_POLL_DESCRIPTOR_TYPE_NONE; | |
1323 | ||
1324 | if (!validate_poll_descriptor(&d)) | |
1325 | return 0; | |
1326 | } | |
1327 | ||
1328 | ossl_quic_reactor_set_poll_r(&ch->rtor, &d); | |
f538b421 HL |
1329 | ossl_quic_demux_set_bio(ch->demux, net_rbio); |
1330 | ch->net_rbio = net_rbio; | |
1331 | return 1; | |
1332 | } | |
1333 | ||
d1ac77b1 | 1334 | int ossl_quic_channel_set_net_wbio(QUIC_CHANNEL *ch, BIO *net_wbio) |
f538b421 HL |
1335 | { |
1336 | BIO_POLL_DESCRIPTOR d = {0}; | |
1337 | ||
1338 | if (ch->net_wbio == net_wbio) | |
1339 | return 1; | |
1340 | ||
1341 | if (net_wbio != NULL) { | |
1342 | if (!BIO_get_wpoll_descriptor(net_wbio, &d)) | |
1343 | /* Non-pollable BIO */ | |
1344 | d.type = BIO_POLL_DESCRIPTOR_TYPE_NONE; | |
1345 | ||
1346 | if (!validate_poll_descriptor(&d)) | |
1347 | return 0; | |
1348 | } | |
1349 | ||
1350 | ossl_quic_reactor_set_poll_w(&ch->rtor, &d); | |
f538b421 HL |
1351 | ossl_qtx_set_bio(ch->qtx, net_wbio); |
1352 | ch->net_wbio = net_wbio; | |
1353 | return 1; | |
1354 | } | |
1355 | ||
1356 | /* | |
1357 | * QUIC Channel: Lifecycle Events | |
1358 | * ============================== | |
1359 | */ | |
1360 | ||
1361 | int ossl_quic_channel_start(QUIC_CHANNEL *ch) | |
1362 | { | |
1363 | /* TODO SERVER */ | |
1364 | if (ch->state != QUIC_CHANNEL_STATE_IDLE) | |
1365 | /* Calls to connect are idempotent */ | |
1366 | return 1; | |
1367 | ||
1368 | /* Inform QTX of peer address. */ | |
1369 | if (!ossl_quic_tx_packetiser_set_peer(ch->txp, &ch->cur_peer_addr)) | |
1370 | return 0; | |
1371 | ||
1372 | /* Plug in secrets for the Initial EL. */ | |
1373 | if (!ossl_quic_provide_initial_secret(ch->libctx, | |
1374 | ch->propq, | |
1375 | &ch->init_dcid, | |
1376 | /*is_server=*/0, | |
1377 | ch->qrx, ch->qtx)) | |
1378 | return 0; | |
1379 | ||
1380 | /* Change state. */ | |
1381 | ch->state = QUIC_CHANNEL_STATE_ACTIVE; | |
1382 | ch->doing_proactive_ver_neg = 0; /* not currently supported */ | |
1383 | ||
1384 | /* Handshake layer: start (e.g. send CH). */ | |
1385 | if (!ossl_quic_dhs_tick(ch->dhs)) | |
1386 | return 0; | |
1387 | ||
1388 | ossl_quic_reactor_tick(&ch->rtor); /* best effort */ | |
1389 | return 1; | |
1390 | } | |
1391 | ||
1392 | /* Start a locally initiated connection shutdown. */ | |
1393 | void ossl_quic_channel_local_close(QUIC_CHANNEL *ch) | |
1394 | { | |
1395 | QUIC_TERMINATE_CAUSE tcause = {0}; | |
1396 | ||
1397 | if (ossl_quic_channel_is_term_any(ch)) | |
1398 | return; | |
1399 | ||
1400 | tcause.app = 1; | |
1401 | ch_start_terminating(ch, &tcause); | |
1402 | } | |
1403 | ||
1404 | static void free_token(const unsigned char *buf, size_t buf_len, void *arg) | |
1405 | { | |
1406 | OPENSSL_free((unsigned char *)buf); | |
1407 | } | |
1408 | ||
1409 | /* Called when a server asks us to do a retry. */ | |
1410 | static int ch_retry(QUIC_CHANNEL *ch, | |
1411 | const unsigned char *retry_token, | |
1412 | size_t retry_token_len, | |
1413 | const QUIC_CONN_ID *retry_scid) | |
1414 | { | |
1415 | void *buf; | |
1416 | ||
1417 | /* We change to using the SCID in the Retry packet as the DCID. */ | |
1418 | if (!ossl_quic_tx_packetiser_set_cur_dcid(ch->txp, retry_scid)) | |
1419 | return 0; | |
1420 | ||
1421 | /* | |
1422 | * Now we retry. We will release the Retry packet immediately, so copy | |
1423 | * the token. | |
1424 | */ | |
e28f512f | 1425 | if ((buf = OPENSSL_memdup(retry_token, retry_token_len)) == NULL) |
f538b421 HL |
1426 | return 0; |
1427 | ||
f538b421 HL |
1428 | ossl_quic_tx_packetiser_set_initial_token(ch->txp, buf, retry_token_len, |
1429 | free_token, NULL); | |
1430 | ||
1431 | ch->retry_scid = *retry_scid; | |
1432 | ch->doing_retry = 1; | |
1433 | ||
1434 | /* | |
1435 | * We need to stimulate the Initial EL to generate the first CRYPTO frame | |
1436 | * again. We can do this most cleanly by simply forcing the ACKM to consider | |
1437 | * the first Initial packet as lost, which it effectively was as the server | |
1438 | * hasn't processed it. This also maintains the desired behaviour with e.g. | |
1439 | * PNs not resetting and so on. | |
1440 | * | |
1441 | * The PN we used initially is always zero, because QUIC does not allow | |
1442 | * repeated retries. | |
1443 | */ | |
1444 | if (!ossl_ackm_mark_packet_pseudo_lost(ch->ackm, QUIC_PN_SPACE_INITIAL, | |
1445 | /*PN=*/0)) | |
1446 | return 0; | |
1447 | ||
1448 | /* | |
1449 | * Plug in new secrets for the Initial EL. This is the only time we change | |
1450 | * the secrets for an EL after we already provisioned it. | |
1451 | */ | |
1452 | if (!ossl_quic_provide_initial_secret(ch->libctx, | |
1453 | ch->propq, | |
1454 | &ch->retry_scid, | |
1455 | /*is_server=*/0, | |
1456 | ch->qrx, ch->qtx)) | |
1457 | return 0; | |
1458 | ||
1459 | return 1; | |
1460 | } | |
1461 | ||
1462 | /* Called when an EL is to be discarded. */ | |
1463 | static int ch_discard_el(QUIC_CHANNEL *ch, | |
1464 | uint32_t enc_level) | |
1465 | { | |
1466 | if (!ossl_assert(enc_level < QUIC_ENC_LEVEL_1RTT)) | |
1467 | return 0; | |
1468 | ||
1469 | if ((ch->el_discarded & (1U << enc_level)) != 0) | |
1470 | /* Already done. */ | |
1471 | return 1; | |
1472 | ||
1473 | /* Best effort for all of these. */ | |
1474 | ossl_quic_tx_packetiser_discard_enc_level(ch->txp, enc_level); | |
1475 | ossl_qrx_discard_enc_level(ch->qrx, enc_level); | |
1476 | ossl_qtx_discard_enc_level(ch->qtx, enc_level); | |
1477 | ||
1478 | if (enc_level != QUIC_ENC_LEVEL_0RTT) { | |
1479 | uint32_t pn_space = ossl_quic_enc_level_to_pn_space(enc_level); | |
1480 | ||
1481 | ossl_ackm_on_pkt_space_discarded(ch->ackm, pn_space); | |
1482 | ||
1483 | /* We should still have crypto streams at this point. */ | |
1484 | assert(ch->crypto_send[pn_space] != NULL); | |
1485 | assert(ch->crypto_recv[pn_space] != NULL); | |
1486 | ||
1487 | /* Get rid of the crypto stream state for the EL. */ | |
1488 | ossl_quic_sstream_free(ch->crypto_send[pn_space]); | |
1489 | ch->crypto_send[pn_space] = NULL; | |
1490 | ||
1491 | ossl_quic_rstream_free(ch->crypto_recv[pn_space]); | |
1492 | ch->crypto_recv[pn_space] = NULL; | |
1493 | } | |
1494 | ||
1495 | ch->el_discarded |= (1U << enc_level); | |
1496 | return 1; | |
1497 | } | |
1498 | ||
1499 | /* Intended to be called by the RXDP. */ | |
1500 | int ossl_quic_channel_on_handshake_confirmed(QUIC_CHANNEL *ch) | |
1501 | { | |
1502 | if (ch->handshake_confirmed) | |
1503 | return 1; | |
1504 | ||
1505 | if (!ch->handshake_complete) { | |
1506 | /* | |
1507 | * Does not make sense for handshake to be confirmed before it is | |
1508 | * completed. | |
1509 | */ | |
1510 | ossl_quic_channel_raise_protocol_error(ch, QUIC_ERR_PROTOCOL_VIOLATION, | |
1511 | OSSL_QUIC_FRAME_TYPE_HANDSHAKE_DONE, | |
1512 | "handshake cannot be confirmed " | |
1513 | "before it is completed"); | |
1514 | return 0; | |
1515 | } | |
1516 | ||
1517 | ch_discard_el(ch, QUIC_ENC_LEVEL_HANDSHAKE); | |
1518 | ch->handshake_confirmed = 1; | |
1519 | return 1; | |
1520 | } | |
1521 | ||
1522 | /* | |
1523 | * Master function used when we want to start tearing down a connection: | |
1524 | * | |
1525 | * - If the connection is still IDLE we can go straight to TERMINATED; | |
1526 | * | |
1527 | * - If we are already TERMINATED this is a no-op. | |
1528 | * | |
1529 | * - If we are TERMINATING - CLOSING and we have now got a CONNECTION_CLOSE | |
9bbc5b54 | 1530 | * from the peer (tcause->remote == 1), we move to TERMINATING - DRAINING. |
f538b421 HL |
1531 | * |
1532 | * - If we are TERMINATING - DRAINING, we remain here until the terminating | |
1533 | * timer expires. | |
1534 | * | |
1535 | * - Otherwise, we are in ACTIVE and move to TERMINATING - CLOSING. | |
1536 | * if we caused the termination (e.g. we have sent a CONNECTION_CLOSE). Note | |
1537 | * that we are considered to have caused a termination if we sent the first | |
1538 | * CONNECTION_CLOSE frame, even if it is caused by a peer protocol | |
1539 | * violation. If the peer sent the first CONNECTION_CLOSE frame, we move to | |
1540 | * TERMINATING - DRAINING. | |
1541 | * | |
1542 | * We record the termination cause structure passed on the first call only. | |
1543 | * Any successive calls have their termination cause data discarded; | |
1544 | * once we start sending a CONNECTION_CLOSE frame, we don't change the details | |
1545 | * in it. | |
1546 | */ | |
1547 | static void ch_start_terminating(QUIC_CHANNEL *ch, | |
1548 | const QUIC_TERMINATE_CAUSE *tcause) | |
1549 | { | |
1550 | switch (ch->state) { | |
1551 | default: | |
1552 | case QUIC_CHANNEL_STATE_IDLE: | |
1553 | ch->terminate_cause = *tcause; | |
1554 | ch_on_terminating_timeout(ch); | |
1555 | break; | |
1556 | ||
1557 | case QUIC_CHANNEL_STATE_ACTIVE: | |
1558 | ch->state = tcause->remote ? QUIC_CHANNEL_STATE_TERMINATING_DRAINING | |
1559 | : QUIC_CHANNEL_STATE_TERMINATING_CLOSING; | |
1560 | ch->terminate_cause = *tcause; | |
1561 | ch->terminate_deadline | |
1562 | = ossl_time_add(ossl_time_now(), | |
1563 | ossl_time_multiply(ossl_ackm_get_pto_duration(ch->ackm), | |
1564 | 3)); | |
1565 | ||
1566 | if (!tcause->remote) { | |
1567 | OSSL_QUIC_FRAME_CONN_CLOSE f = {0}; | |
1568 | ||
1569 | /* best effort */ | |
1570 | f.error_code = ch->terminate_cause.error_code; | |
1571 | f.frame_type = ch->terminate_cause.frame_type; | |
1572 | f.is_app = ch->terminate_cause.app; | |
1573 | ossl_quic_tx_packetiser_schedule_conn_close(ch->txp, &f); | |
1574 | ch->conn_close_queued = 1; | |
1575 | } | |
1576 | break; | |
1577 | ||
1578 | case QUIC_CHANNEL_STATE_TERMINATING_CLOSING: | |
1579 | if (tcause->remote) | |
1580 | ch->state = QUIC_CHANNEL_STATE_TERMINATING_DRAINING; | |
1581 | ||
1582 | break; | |
1583 | ||
1584 | case QUIC_CHANNEL_STATE_TERMINATING_DRAINING: | |
1585 | /* We remain here until the timout expires. */ | |
1586 | break; | |
1587 | ||
1588 | case QUIC_CHANNEL_STATE_TERMINATED: | |
1589 | /* No-op. */ | |
1590 | break; | |
1591 | } | |
1592 | } | |
1593 | ||
1594 | /* For RXDP use. */ | |
1595 | void ossl_quic_channel_on_remote_conn_close(QUIC_CHANNEL *ch, | |
1596 | OSSL_QUIC_FRAME_CONN_CLOSE *f) | |
1597 | { | |
1598 | QUIC_TERMINATE_CAUSE tcause = {0}; | |
1599 | ||
1600 | if (!ossl_quic_channel_is_active(ch)) | |
1601 | return; | |
1602 | ||
1603 | tcause.remote = 1; | |
1604 | tcause.app = f->is_app; | |
1605 | tcause.error_code = f->error_code; | |
1606 | tcause.frame_type = f->frame_type; | |
1607 | ||
1608 | ch_start_terminating(ch, &tcause); | |
1609 | } | |
1610 | ||
1611 | void ossl_quic_channel_raise_protocol_error(QUIC_CHANNEL *ch, | |
1612 | uint64_t error_code, | |
1613 | uint64_t frame_type, | |
1614 | const char *reason) | |
1615 | { | |
1616 | QUIC_TERMINATE_CAUSE tcause = {0}; | |
1617 | ||
1618 | tcause.error_code = error_code; | |
1619 | tcause.frame_type = frame_type; | |
1620 | ||
1621 | ch_start_terminating(ch, &tcause); | |
1622 | } | |
1623 | ||
1624 | /* | |
1625 | * Called once the terminating timer expires, meaning we move from TERMINATING | |
1626 | * to TERMINATED. | |
1627 | */ | |
1628 | static void ch_on_terminating_timeout(QUIC_CHANNEL *ch) | |
1629 | { | |
1630 | ch->state = QUIC_CHANNEL_STATE_TERMINATED; | |
1631 | } | |
1632 | ||
1633 | /* | |
1634 | * Updates our idle deadline. Called when an event happens which should bump the | |
1635 | * idle timeout. | |
1636 | */ | |
1637 | static void ch_update_idle(QUIC_CHANNEL *ch) | |
1638 | { | |
1639 | if (ch->max_idle_timeout == 0) | |
1640 | ch->idle_deadline = ossl_time_infinite(); | |
1641 | else | |
1642 | ch->idle_deadline = ossl_time_add(ossl_time_now(), | |
1643 | ossl_ms2time(ch->max_idle_timeout)); | |
1644 | } | |
1645 | ||
1646 | /* Called when the idle timeout expires. */ | |
1647 | static void ch_on_idle_timeout(QUIC_CHANNEL *ch) | |
1648 | { | |
1649 | /* | |
1650 | * Idle timeout does not have an error code associated with it because a | |
1651 | * CONN_CLOSE is never sent for it. We shouldn't use this data once we reach | |
1652 | * TERMINATED anyway. | |
1653 | */ | |
1654 | ch->terminate_cause.app = 0; | |
1655 | ch->terminate_cause.error_code = UINT64_MAX; | |
1656 | ch->terminate_cause.frame_type = 0; | |
1657 | ||
1658 | ch->state = QUIC_CHANNEL_STATE_TERMINATED; | |
1659 | } |