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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 | ||
b1b06da2 HL |
17 | /* |
18 | * NOTE: While this channel implementation currently has basic server support, | |
19 | * this functionality has been implemented for internal testing purposes and is | |
20 | * not suitable for network use. In particular, it does not implement address | |
21 | * validation, anti-amplification or retry logic. | |
22 | * | |
23 | * TODO(QUIC): Implement address validation and anti-amplification | |
24 | * TODO(QUIC): Implement retry logic | |
25 | */ | |
26 | ||
f538b421 HL |
27 | #define INIT_DCID_LEN 8 |
28 | #define INIT_CRYPTO_BUF_LEN 8192 | |
29 | #define INIT_APP_BUF_LEN 8192 | |
30 | ||
3bf4dc8c | 31 | static void ch_rx_pre(QUIC_CHANNEL *ch); |
f538b421 HL |
32 | static int ch_rx(QUIC_CHANNEL *ch); |
33 | static int ch_tx(QUIC_CHANNEL *ch); | |
34 | static void ch_tick(QUIC_TICK_RESULT *res, void *arg); | |
35 | static void ch_rx_handle_packet(QUIC_CHANNEL *ch); | |
36 | static OSSL_TIME ch_determine_next_tick_deadline(QUIC_CHANNEL *ch); | |
37 | static int ch_retry(QUIC_CHANNEL *ch, | |
38 | const unsigned char *retry_token, | |
39 | size_t retry_token_len, | |
40 | const QUIC_CONN_ID *retry_scid); | |
41 | static void ch_cleanup(QUIC_CHANNEL *ch); | |
42 | static int ch_generate_transport_params(QUIC_CHANNEL *ch); | |
43 | static int ch_on_transport_params(const unsigned char *params, | |
44 | size_t params_len, | |
45 | void *arg); | |
46 | static int ch_on_handshake_alert(void *arg, unsigned char alert_code); | |
47 | static int ch_on_handshake_complete(void *arg); | |
48 | static int ch_on_handshake_yield_secret(uint32_t enc_level, int direction, | |
49 | uint32_t suite_id, EVP_MD *md, | |
50 | const unsigned char *secret, | |
51 | size_t secret_len, | |
52 | void *arg); | |
53 | static int ch_on_crypto_recv(unsigned char *buf, size_t buf_len, | |
54 | size_t *bytes_read, void *arg); | |
55 | static int crypto_ensure_empty(QUIC_RSTREAM *rstream); | |
56 | static int ch_on_crypto_send(const unsigned char *buf, size_t buf_len, | |
57 | size_t *consumed, void *arg); | |
58 | static OSSL_TIME get_time(void *arg); | |
59 | static uint64_t get_stream_limit(int uni, void *arg); | |
60 | static int rx_early_validate(QUIC_PN pn, int pn_space, void *arg); | |
61 | static int ch_retry(QUIC_CHANNEL *ch, | |
62 | const unsigned char *retry_token, | |
63 | size_t retry_token_len, | |
64 | const QUIC_CONN_ID *retry_scid); | |
65 | static void ch_update_idle(QUIC_CHANNEL *ch); | |
66 | static int ch_discard_el(QUIC_CHANNEL *ch, | |
67 | uint32_t enc_level); | |
68 | static void ch_on_idle_timeout(QUIC_CHANNEL *ch); | |
69 | static void ch_update_idle(QUIC_CHANNEL *ch); | |
df15e990 | 70 | static void ch_raise_net_error(QUIC_CHANNEL *ch); |
f538b421 HL |
71 | static void ch_on_terminating_timeout(QUIC_CHANNEL *ch); |
72 | static void ch_start_terminating(QUIC_CHANNEL *ch, | |
df15e990 HL |
73 | const QUIC_TERMINATE_CAUSE *tcause, |
74 | int force_immediate); | |
b1b06da2 HL |
75 | static void ch_default_packet_handler(QUIC_URXE *e, void *arg); |
76 | static int ch_server_on_new_conn(QUIC_CHANNEL *ch, const BIO_ADDR *peer, | |
77 | const QUIC_CONN_ID *peer_scid, | |
78 | const QUIC_CONN_ID *peer_dcid); | |
f538b421 HL |
79 | |
80 | static int gen_rand_conn_id(OSSL_LIB_CTX *libctx, size_t len, QUIC_CONN_ID *cid) | |
81 | { | |
82 | if (len > QUIC_MAX_CONN_ID_LEN) | |
83 | return 0; | |
84 | ||
85 | cid->id_len = (unsigned char)len; | |
86 | ||
87 | if (RAND_bytes_ex(libctx, cid->id, len, len * 8) != 1) { | |
88 | cid->id_len = 0; | |
89 | return 0; | |
90 | } | |
91 | ||
92 | return 1; | |
93 | } | |
94 | ||
95 | /* | |
96 | * QUIC Channel Initialization and Teardown | |
97 | * ======================================== | |
98 | */ | |
99 | static int ch_init(QUIC_CHANNEL *ch) | |
100 | { | |
101 | OSSL_QUIC_TX_PACKETISER_ARGS txp_args = {0}; | |
102 | OSSL_QTX_ARGS qtx_args = {0}; | |
103 | OSSL_QRX_ARGS qrx_args = {0}; | |
2723d705 | 104 | QUIC_TLS_ARGS tls_args = {0}; |
f538b421 | 105 | uint32_t pn_space; |
b1b06da2 | 106 | size_t rx_short_cid_len = ch->is_server ? INIT_DCID_LEN : 0; |
f538b421 | 107 | |
b1b06da2 HL |
108 | /* For clients, generate our initial DCID. */ |
109 | if (!ch->is_server | |
110 | && !gen_rand_conn_id(ch->libctx, INIT_DCID_LEN, &ch->init_dcid)) | |
f538b421 HL |
111 | goto err; |
112 | ||
113 | /* We plug in a network write BIO to the QTX later when we get one. */ | |
114 | qtx_args.mdpl = QUIC_MIN_INITIAL_DGRAM_LEN; | |
115 | ch->rx_max_udp_payload_size = qtx_args.mdpl; | |
116 | ||
117 | ch->qtx = ossl_qtx_new(&qtx_args); | |
118 | if (ch->qtx == NULL) | |
119 | goto err; | |
120 | ||
121 | ch->txpim = ossl_quic_txpim_new(); | |
122 | if (ch->txpim == NULL) | |
123 | goto err; | |
124 | ||
125 | ch->cfq = ossl_quic_cfq_new(); | |
126 | if (ch->cfq == NULL) | |
127 | goto err; | |
128 | ||
129 | if (!ossl_quic_txfc_init(&ch->conn_txfc, NULL)) | |
130 | goto err; | |
131 | ||
132 | if (!ossl_quic_rxfc_init(&ch->conn_rxfc, NULL, | |
133 | 2 * 1024 * 1024, | |
134 | 10 * 1024 * 1024, | |
135 | get_time, NULL)) | |
136 | goto err; | |
137 | ||
138 | if (!ossl_statm_init(&ch->statm)) | |
139 | goto err; | |
140 | ||
141 | ch->have_statm = 1; | |
142 | ch->cc_method = &ossl_cc_dummy_method; | |
143 | if ((ch->cc_data = ch->cc_method->new(NULL, NULL, NULL)) == NULL) | |
144 | goto err; | |
145 | ||
146 | if ((ch->ackm = ossl_ackm_new(get_time, NULL, &ch->statm, | |
147 | ch->cc_method, ch->cc_data)) == NULL) | |
148 | goto err; | |
149 | ||
150 | if (!ossl_quic_stream_map_init(&ch->qsm, get_stream_limit, ch)) | |
151 | goto err; | |
152 | ||
153 | ch->have_qsm = 1; | |
154 | ||
155 | /* We use a zero-length SCID. */ | |
156 | txp_args.cur_dcid = ch->init_dcid; | |
157 | txp_args.ack_delay_exponent = 3; | |
158 | txp_args.qtx = ch->qtx; | |
159 | txp_args.txpim = ch->txpim; | |
160 | txp_args.cfq = ch->cfq; | |
161 | txp_args.ackm = ch->ackm; | |
162 | txp_args.qsm = &ch->qsm; | |
163 | txp_args.conn_txfc = &ch->conn_txfc; | |
164 | txp_args.conn_rxfc = &ch->conn_rxfc; | |
165 | txp_args.cc_method = ch->cc_method; | |
166 | txp_args.cc_data = ch->cc_data; | |
167 | txp_args.now = get_time; | |
168 | for (pn_space = QUIC_PN_SPACE_INITIAL; pn_space < QUIC_PN_SPACE_NUM; ++pn_space) { | |
169 | ch->crypto_send[pn_space] = ossl_quic_sstream_new(INIT_CRYPTO_BUF_LEN); | |
170 | if (ch->crypto_send[pn_space] == NULL) | |
171 | goto err; | |
172 | ||
173 | txp_args.crypto[pn_space] = ch->crypto_send[pn_space]; | |
174 | } | |
175 | ||
176 | ch->txp = ossl_quic_tx_packetiser_new(&txp_args); | |
177 | if (ch->txp == NULL) | |
178 | goto err; | |
179 | ||
b1b06da2 HL |
180 | if ((ch->demux = ossl_quic_demux_new(/*BIO=*/NULL, |
181 | /*Short CID Len=*/rx_short_cid_len, | |
d7668ff2 | 182 | get_time, NULL)) == NULL) |
f538b421 HL |
183 | goto err; |
184 | ||
b1b06da2 HL |
185 | /* |
186 | * If we are a server, setup our handler for packets not corresponding to | |
187 | * any known DCID on our end. This is for handling clients establishing new | |
188 | * connections. | |
189 | */ | |
190 | if (ch->is_server) | |
191 | ossl_quic_demux_set_default_handler(ch->demux, | |
192 | ch_default_packet_handler, | |
193 | ch); | |
194 | ||
f538b421 | 195 | qrx_args.demux = ch->demux; |
b1b06da2 | 196 | qrx_args.short_conn_id_len = rx_short_cid_len; |
f538b421 HL |
197 | qrx_args.max_deferred = 32; |
198 | ||
199 | if ((ch->qrx = ossl_qrx_new(&qrx_args)) == NULL) | |
200 | goto err; | |
201 | ||
202 | if (!ossl_qrx_set_early_validation_cb(ch->qrx, | |
203 | rx_early_validate, | |
204 | ch)) | |
205 | goto err; | |
206 | ||
b1b06da2 | 207 | if (!ch->is_server && !ossl_qrx_add_dst_conn_id(ch->qrx, &txp_args.cur_scid)) |
f538b421 HL |
208 | goto err; |
209 | ||
210 | for (pn_space = QUIC_PN_SPACE_INITIAL; pn_space < QUIC_PN_SPACE_NUM; ++pn_space) { | |
211 | ch->crypto_recv[pn_space] = ossl_quic_rstream_new(NULL, NULL); | |
212 | if (ch->crypto_recv[pn_space] == NULL) | |
213 | goto err; | |
214 | } | |
215 | ||
216 | if ((ch->stream0 = ossl_quic_stream_map_alloc(&ch->qsm, 0, | |
217 | QUIC_STREAM_INITIATOR_CLIENT | |
218 | | QUIC_STREAM_DIR_BIDI)) == NULL) | |
219 | goto err; | |
220 | ||
221 | if ((ch->stream0->sstream = ossl_quic_sstream_new(INIT_APP_BUF_LEN)) == NULL) | |
222 | goto err; | |
223 | ||
224 | if ((ch->stream0->rstream = ossl_quic_rstream_new(NULL, NULL)) == NULL) | |
225 | goto err; | |
226 | ||
227 | if (!ossl_quic_txfc_init(&ch->stream0->txfc, &ch->conn_txfc)) | |
228 | goto err; | |
229 | ||
230 | if (!ossl_quic_rxfc_init(&ch->stream0->rxfc, &ch->conn_rxfc, | |
231 | 1 * 1024 * 1024, | |
232 | 5 * 1024 * 1024, | |
233 | get_time, NULL)) | |
234 | goto err; | |
235 | ||
2723d705 MC |
236 | /* Plug in the TLS handshake layer. */ |
237 | tls_args.s = ch->tls; | |
238 | tls_args.crypto_send_cb = ch_on_crypto_send; | |
239 | tls_args.crypto_send_cb_arg = ch; | |
240 | tls_args.crypto_recv_cb = ch_on_crypto_recv; | |
241 | tls_args.crypto_recv_cb_arg = ch; | |
242 | tls_args.yield_secret_cb = ch_on_handshake_yield_secret; | |
243 | tls_args.yield_secret_cb_arg = ch; | |
244 | tls_args.got_transport_params_cb = ch_on_transport_params; | |
245 | tls_args.got_transport_params_cb_arg= ch; | |
246 | tls_args.handshake_complete_cb = ch_on_handshake_complete; | |
247 | tls_args.handshake_complete_cb_arg = ch; | |
248 | tls_args.alert_cb = ch_on_handshake_alert; | |
249 | tls_args.alert_cb_arg = ch; | |
250 | tls_args.is_server = ch->is_server; | |
251 | ||
252 | if ((ch->qtls = ossl_quic_tls_new(&tls_args)) == NULL) | |
f538b421 HL |
253 | goto err; |
254 | ||
255 | /* | |
256 | * Determine the QUIC Transport Parameters and serialize the transport | |
257 | * parameters block. (For servers, we do this later as we must defer | |
258 | * generation until we have received the client's transport parameters.) | |
259 | */ | |
260 | if (!ch->is_server && !ch_generate_transport_params(ch)) | |
261 | goto err; | |
262 | ||
263 | ch->rx_max_ack_delay = QUIC_DEFAULT_MAX_ACK_DELAY; | |
264 | ch->rx_ack_delay_exp = QUIC_DEFAULT_ACK_DELAY_EXP; | |
265 | ch->rx_active_conn_id_limit = QUIC_MIN_ACTIVE_CONN_ID_LIMIT; | |
266 | ch->max_idle_timeout = QUIC_DEFAULT_IDLE_TIMEOUT; | |
267 | ch->tx_enc_level = QUIC_ENC_LEVEL_INITIAL; | |
45ecfc9b | 268 | ch->rx_enc_level = QUIC_ENC_LEVEL_INITIAL; |
f538b421 HL |
269 | ch_update_idle(ch); |
270 | ossl_quic_reactor_init(&ch->rtor, ch_tick, ch, | |
271 | ch_determine_next_tick_deadline(ch)); | |
272 | return 1; | |
273 | ||
274 | err: | |
275 | ch_cleanup(ch); | |
276 | return 0; | |
277 | } | |
278 | ||
279 | static void ch_cleanup(QUIC_CHANNEL *ch) | |
280 | { | |
281 | uint32_t pn_space; | |
282 | ||
283 | if (ch->ackm != NULL) | |
284 | for (pn_space = QUIC_PN_SPACE_INITIAL; | |
285 | pn_space < QUIC_PN_SPACE_NUM; | |
286 | ++pn_space) | |
287 | ossl_ackm_on_pkt_space_discarded(ch->ackm, pn_space); | |
288 | ||
289 | ossl_quic_tx_packetiser_free(ch->txp); | |
290 | ossl_quic_txpim_free(ch->txpim); | |
291 | ossl_quic_cfq_free(ch->cfq); | |
292 | ossl_qtx_free(ch->qtx); | |
293 | if (ch->cc_data != NULL) | |
294 | ch->cc_method->free(ch->cc_data); | |
295 | if (ch->have_statm) | |
296 | ossl_statm_destroy(&ch->statm); | |
297 | ossl_ackm_free(ch->ackm); | |
298 | ||
299 | if (ch->stream0 != NULL) { | |
300 | assert(ch->have_qsm); | |
301 | ossl_quic_stream_map_release(&ch->qsm, ch->stream0); /* frees sstream */ | |
302 | } | |
303 | ||
304 | if (ch->have_qsm) | |
305 | ossl_quic_stream_map_cleanup(&ch->qsm); | |
306 | ||
307 | for (pn_space = QUIC_PN_SPACE_INITIAL; pn_space < QUIC_PN_SPACE_NUM; ++pn_space) { | |
308 | ossl_quic_sstream_free(ch->crypto_send[pn_space]); | |
309 | ossl_quic_rstream_free(ch->crypto_recv[pn_space]); | |
310 | } | |
311 | ||
312 | ossl_qrx_pkt_release(ch->qrx_pkt); | |
313 | ch->qrx_pkt = NULL; | |
314 | ||
2723d705 | 315 | ossl_quic_tls_free(ch->qtls); |
f538b421 HL |
316 | ossl_qrx_free(ch->qrx); |
317 | ossl_quic_demux_free(ch->demux); | |
318 | OPENSSL_free(ch->local_transport_params); | |
f538b421 HL |
319 | } |
320 | ||
321 | QUIC_CHANNEL *ossl_quic_channel_new(const QUIC_CHANNEL_ARGS *args) | |
322 | { | |
323 | QUIC_CHANNEL *ch = NULL; | |
324 | ||
325 | if ((ch = OPENSSL_zalloc(sizeof(*ch))) == NULL) | |
326 | return NULL; | |
327 | ||
328 | ch->libctx = args->libctx; | |
329 | ch->propq = args->propq; | |
330 | ch->is_server = args->is_server; | |
2723d705 | 331 | ch->tls = args->tls; |
f538b421 HL |
332 | |
333 | if (!ch_init(ch)) { | |
334 | OPENSSL_free(ch); | |
335 | return NULL; | |
336 | } | |
337 | ||
338 | return ch; | |
339 | } | |
340 | ||
341 | void ossl_quic_channel_free(QUIC_CHANNEL *ch) | |
342 | { | |
343 | if (ch == NULL) | |
344 | return; | |
345 | ||
346 | ch_cleanup(ch); | |
347 | OPENSSL_free(ch); | |
348 | } | |
349 | ||
14e31409 MC |
350 | /* Set mutator callbacks for test framework support */ |
351 | int ossl_quic_channel_set_mutator(QUIC_CHANNEL *ch, | |
352 | ossl_mutate_packet_cb mutatecb, | |
353 | ossl_finish_mutate_cb finishmutatecb, | |
354 | void *mutatearg) | |
355 | { | |
356 | if (ch->qtx == NULL) | |
357 | return 0; | |
358 | ||
359 | ossl_qtx_set_mutator(ch->qtx, mutatecb, finishmutatecb, mutatearg); | |
360 | return 1; | |
361 | } | |
362 | ||
f538b421 HL |
363 | int ossl_quic_channel_get_peer_addr(QUIC_CHANNEL *ch, BIO_ADDR *peer_addr) |
364 | { | |
365 | *peer_addr = ch->cur_peer_addr; | |
366 | return 1; | |
367 | } | |
368 | ||
369 | int ossl_quic_channel_set_peer_addr(QUIC_CHANNEL *ch, const BIO_ADDR *peer_addr) | |
370 | { | |
371 | ch->cur_peer_addr = *peer_addr; | |
372 | return 1; | |
373 | } | |
374 | ||
375 | QUIC_REACTOR *ossl_quic_channel_get_reactor(QUIC_CHANNEL *ch) | |
376 | { | |
377 | return &ch->rtor; | |
378 | } | |
379 | ||
380 | QUIC_STREAM_MAP *ossl_quic_channel_get_qsm(QUIC_CHANNEL *ch) | |
381 | { | |
382 | return &ch->qsm; | |
383 | } | |
384 | ||
385 | OSSL_STATM *ossl_quic_channel_get_statm(QUIC_CHANNEL *ch) | |
386 | { | |
387 | return &ch->statm; | |
388 | } | |
389 | ||
390 | QUIC_STREAM *ossl_quic_channel_get_stream_by_id(QUIC_CHANNEL *ch, | |
391 | uint64_t stream_id) | |
392 | { | |
393 | return ossl_quic_stream_map_get_by_id(&ch->qsm, stream_id); | |
394 | } | |
395 | ||
396 | int ossl_quic_channel_is_active(const QUIC_CHANNEL *ch) | |
397 | { | |
398 | return ch != NULL && ch->state == QUIC_CHANNEL_STATE_ACTIVE; | |
399 | } | |
400 | ||
c12e1113 | 401 | int ossl_quic_channel_is_terminating(const QUIC_CHANNEL *ch) |
f538b421 | 402 | { |
149a8e6c | 403 | if (ch->state == QUIC_CHANNEL_STATE_TERMINATING_CLOSING |
c12e1113 | 404 | || ch->state == QUIC_CHANNEL_STATE_TERMINATING_DRAINING) |
149a8e6c | 405 | return 1; |
c12e1113 | 406 | |
149a8e6c | 407 | return 0; |
f538b421 HL |
408 | } |
409 | ||
c12e1113 | 410 | int ossl_quic_channel_is_terminated(const QUIC_CHANNEL *ch) |
f538b421 | 411 | { |
c12e1113 | 412 | if (ch->state == QUIC_CHANNEL_STATE_TERMINATED) |
149a8e6c | 413 | return 1; |
c12e1113 | 414 | |
149a8e6c | 415 | return 0; |
f538b421 HL |
416 | } |
417 | ||
c12e1113 MC |
418 | int ossl_quic_channel_is_term_any(const QUIC_CHANNEL *ch) |
419 | { | |
420 | return ossl_quic_channel_is_terminating(ch) | |
421 | || ossl_quic_channel_is_terminated(ch); | |
422 | } | |
423 | ||
424 | QUIC_TERMINATE_CAUSE ossl_quic_channel_get_terminate_cause(const QUIC_CHANNEL *ch) | |
f538b421 | 425 | { |
c12e1113 | 426 | return ch->terminate_cause; |
f538b421 HL |
427 | } |
428 | ||
429 | int ossl_quic_channel_is_handshake_complete(const QUIC_CHANNEL *ch) | |
430 | { | |
431 | return ch->handshake_complete; | |
432 | } | |
433 | ||
ce8f20b6 MC |
434 | int ossl_quic_channel_is_handshake_confirmed(const QUIC_CHANNEL *ch) |
435 | { | |
436 | return ch->handshake_confirmed; | |
437 | } | |
438 | ||
f538b421 HL |
439 | /* |
440 | * QUIC Channel: Callbacks from Miscellaneous Subsidiary Components | |
441 | * ================================================================ | |
442 | */ | |
443 | ||
444 | /* Used by various components. */ | |
445 | static OSSL_TIME get_time(void *arg) | |
446 | { | |
447 | return ossl_time_now(); | |
448 | } | |
449 | ||
450 | /* Used by QSM. */ | |
451 | static uint64_t get_stream_limit(int uni, void *arg) | |
452 | { | |
453 | QUIC_CHANNEL *ch = arg; | |
454 | ||
455 | return uni ? ch->max_local_streams_uni : ch->max_local_streams_bidi; | |
456 | } | |
457 | ||
458 | /* | |
459 | * Called by QRX to determine if a packet is potentially invalid before trying | |
460 | * to decrypt it. | |
461 | */ | |
462 | static int rx_early_validate(QUIC_PN pn, int pn_space, void *arg) | |
463 | { | |
464 | QUIC_CHANNEL *ch = arg; | |
465 | ||
466 | /* Potential duplicates should not be processed. */ | |
467 | if (!ossl_ackm_is_rx_pn_processable(ch->ackm, pn, pn_space)) | |
468 | return 0; | |
469 | ||
470 | return 1; | |
471 | } | |
472 | ||
473 | /* | |
474 | * QUIC Channel: Handshake Layer Event Handling | |
475 | * ============================================ | |
476 | */ | |
477 | static int ch_on_crypto_send(const unsigned char *buf, size_t buf_len, | |
478 | size_t *consumed, void *arg) | |
479 | { | |
480 | int ret; | |
481 | QUIC_CHANNEL *ch = arg; | |
482 | uint32_t enc_level = ch->tx_enc_level; | |
483 | uint32_t pn_space = ossl_quic_enc_level_to_pn_space(enc_level); | |
484 | QUIC_SSTREAM *sstream = ch->crypto_send[pn_space]; | |
485 | ||
486 | if (!ossl_assert(sstream != NULL)) | |
487 | return 0; | |
488 | ||
489 | ret = ossl_quic_sstream_append(sstream, buf, buf_len, consumed); | |
490 | return ret; | |
491 | } | |
492 | ||
493 | static int crypto_ensure_empty(QUIC_RSTREAM *rstream) | |
494 | { | |
495 | size_t avail = 0; | |
496 | int is_fin = 0; | |
497 | ||
498 | if (rstream == NULL) | |
499 | return 1; | |
500 | ||
501 | if (!ossl_quic_rstream_available(rstream, &avail, &is_fin)) | |
502 | return 0; | |
503 | ||
504 | return avail == 0; | |
505 | } | |
506 | ||
507 | static int ch_on_crypto_recv(unsigned char *buf, size_t buf_len, | |
508 | size_t *bytes_read, void *arg) | |
509 | { | |
510 | QUIC_CHANNEL *ch = arg; | |
511 | QUIC_RSTREAM *rstream; | |
512 | int is_fin = 0; /* crypto stream is never finished, so we don't use this */ | |
513 | uint32_t i; | |
514 | ||
515 | /* | |
516 | * After we move to a later EL we must not allow our peer to send any new | |
517 | * bytes in the crypto stream on a previous EL. Retransmissions of old bytes | |
518 | * are allowed. | |
519 | * | |
520 | * In practice we will only move to a new EL when we have consumed all bytes | |
521 | * which should be sent on the crypto stream at a previous EL. For example, | |
522 | * the Handshake EL should not be provisioned until we have completely | |
523 | * consumed a TLS 1.3 ServerHello. Thus when we provision an EL the output | |
524 | * of ossl_quic_rstream_available() should be 0 for all lower ELs. Thus if a | |
525 | * given EL is available we simply ensure we have not received any further | |
526 | * bytes at a lower EL. | |
527 | */ | |
45ecfc9b | 528 | for (i = QUIC_ENC_LEVEL_INITIAL; i < ch->rx_enc_level; ++i) |
f538b421 HL |
529 | if (i != QUIC_ENC_LEVEL_0RTT && |
530 | !crypto_ensure_empty(ch->crypto_recv[ossl_quic_enc_level_to_pn_space(i)])) { | |
531 | /* Protocol violation (RFC 9001 s. 4.1.3) */ | |
532 | ossl_quic_channel_raise_protocol_error(ch, QUIC_ERR_PROTOCOL_VIOLATION, | |
533 | OSSL_QUIC_FRAME_TYPE_CRYPTO, | |
534 | "crypto stream data in wrong EL"); | |
535 | return 0; | |
536 | } | |
537 | ||
45ecfc9b | 538 | rstream = ch->crypto_recv[ossl_quic_enc_level_to_pn_space(ch->rx_enc_level)]; |
f538b421 HL |
539 | if (rstream == NULL) |
540 | return 0; | |
541 | ||
542 | return ossl_quic_rstream_read(rstream, buf, buf_len, bytes_read, | |
543 | &is_fin); | |
544 | } | |
545 | ||
546 | static int ch_on_handshake_yield_secret(uint32_t enc_level, int direction, | |
547 | uint32_t suite_id, EVP_MD *md, | |
548 | const unsigned char *secret, | |
549 | size_t secret_len, | |
550 | void *arg) | |
551 | { | |
552 | QUIC_CHANNEL *ch = arg; | |
553 | uint32_t i; | |
554 | ||
555 | if (enc_level < QUIC_ENC_LEVEL_HANDSHAKE || enc_level >= QUIC_ENC_LEVEL_NUM) | |
556 | /* Invalid EL. */ | |
557 | return 0; | |
558 | ||
f538b421 HL |
559 | |
560 | if (direction) { | |
561 | /* TX */ | |
45ecfc9b MC |
562 | if (enc_level <= ch->tx_enc_level) |
563 | /* | |
9f0ade7c HL |
564 | * Does not make sense for us to try and provision an EL we have already |
565 | * attained. | |
566 | */ | |
45ecfc9b MC |
567 | return 0; |
568 | ||
f538b421 HL |
569 | if (!ossl_qtx_provide_secret(ch->qtx, enc_level, |
570 | suite_id, md, | |
571 | secret, secret_len)) | |
572 | return 0; | |
573 | ||
574 | ch->tx_enc_level = enc_level; | |
575 | } else { | |
576 | /* RX */ | |
45ecfc9b MC |
577 | if (enc_level <= ch->rx_enc_level) |
578 | /* | |
9f0ade7c HL |
579 | * Does not make sense for us to try and provision an EL we have already |
580 | * attained. | |
581 | */ | |
45ecfc9b MC |
582 | return 0; |
583 | ||
584 | /* | |
9f0ade7c HL |
585 | * Ensure all crypto streams for previous ELs are now empty of available |
586 | * data. | |
587 | */ | |
45ecfc9b | 588 | for (i = QUIC_ENC_LEVEL_INITIAL; i < enc_level; ++i) |
e28f512f | 589 | if (!crypto_ensure_empty(ch->crypto_recv[ossl_quic_enc_level_to_pn_space(i)])) { |
45ecfc9b MC |
590 | /* Protocol violation (RFC 9001 s. 4.1.3) */ |
591 | ossl_quic_channel_raise_protocol_error(ch, QUIC_ERR_PROTOCOL_VIOLATION, | |
592 | OSSL_QUIC_FRAME_TYPE_CRYPTO, | |
593 | "crypto stream data in wrong EL"); | |
594 | return 0; | |
595 | } | |
596 | ||
f538b421 HL |
597 | if (!ossl_qrx_provide_secret(ch->qrx, enc_level, |
598 | suite_id, md, | |
599 | secret, secret_len)) | |
600 | return 0; | |
92282a17 HL |
601 | |
602 | ch->have_new_rx_secret = 1; | |
45ecfc9b | 603 | ch->rx_enc_level = enc_level; |
f538b421 HL |
604 | } |
605 | ||
606 | return 1; | |
607 | } | |
608 | ||
609 | static int ch_on_handshake_complete(void *arg) | |
610 | { | |
611 | QUIC_CHANNEL *ch = arg; | |
612 | ||
e28f512f | 613 | if (!ossl_assert(!ch->handshake_complete)) |
f538b421 HL |
614 | return 0; /* this should not happen twice */ |
615 | ||
616 | if (!ossl_assert(ch->tx_enc_level == QUIC_ENC_LEVEL_1RTT)) | |
617 | return 0; | |
618 | ||
62d0da12 | 619 | if (!ch->got_remote_transport_params) { |
f538b421 HL |
620 | /* |
621 | * Was not a valid QUIC handshake if we did not get valid transport | |
622 | * params. | |
623 | */ | |
62d0da12 MC |
624 | ossl_quic_channel_raise_protocol_error(ch, QUIC_ERR_PROTOCOL_VIOLATION, |
625 | OSSL_QUIC_FRAME_TYPE_CRYPTO, | |
626 | "no transport parameters received"); | |
f538b421 | 627 | return 0; |
62d0da12 | 628 | } |
f538b421 HL |
629 | |
630 | /* Don't need transport parameters anymore. */ | |
631 | OPENSSL_free(ch->local_transport_params); | |
632 | ch->local_transport_params = NULL; | |
633 | ||
634 | /* Tell TXP the handshake is complete. */ | |
635 | ossl_quic_tx_packetiser_notify_handshake_complete(ch->txp); | |
636 | ||
637 | ch->handshake_complete = 1; | |
b1b06da2 HL |
638 | |
639 | if (ch->is_server) { | |
640 | /* | |
641 | * On the server, the handshake is confirmed as soon as it is complete. | |
642 | */ | |
643 | ossl_quic_channel_on_handshake_confirmed(ch); | |
644 | ||
645 | ossl_quic_tx_packetiser_schedule_handshake_done(ch->txp); | |
646 | } | |
647 | ||
f538b421 HL |
648 | return 1; |
649 | } | |
650 | ||
651 | static int ch_on_handshake_alert(void *arg, unsigned char alert_code) | |
652 | { | |
653 | QUIC_CHANNEL *ch = arg; | |
654 | ||
655 | ossl_quic_channel_raise_protocol_error(ch, QUIC_ERR_CRYPTO_ERR_BEGIN + alert_code, | |
656 | 0, "handshake alert"); | |
657 | return 1; | |
658 | } | |
659 | ||
660 | /* | |
661 | * QUIC Channel: Transport Parameter Handling | |
662 | * ========================================== | |
663 | */ | |
664 | ||
665 | /* | |
666 | * Called by handshake layer when we receive QUIC Transport Parameters from the | |
667 | * peer. Note that these are not authenticated until the handshake is marked | |
668 | * as complete. | |
669 | */ | |
3c567a52 HL |
670 | #define TP_REASON_SERVER_ONLY(x) \ |
671 | x " may not be sent by a client" | |
672 | #define TP_REASON_DUP(x) \ | |
673 | x " appears multiple times" | |
674 | #define TP_REASON_MALFORMED(x) \ | |
675 | x " is malformed" | |
676 | #define TP_REASON_EXPECTED_VALUE(x) \ | |
677 | x " does not match expected value" | |
678 | #define TP_REASON_NOT_RETRY(x) \ | |
679 | x " sent when not performing a retry" | |
680 | #define TP_REASON_REQUIRED(x) \ | |
681 | x " was not sent but is required" | |
682 | ||
f538b421 HL |
683 | static int ch_on_transport_params(const unsigned char *params, |
684 | size_t params_len, | |
685 | void *arg) | |
686 | { | |
687 | QUIC_CHANNEL *ch = arg; | |
688 | PACKET pkt; | |
689 | uint64_t id, v; | |
690 | size_t len; | |
691 | const unsigned char *body; | |
692 | int got_orig_dcid = 0; | |
693 | int got_initial_scid = 0; | |
694 | int got_retry_scid = 0; | |
695 | int got_initial_max_data = 0; | |
696 | int got_initial_max_stream_data_bidi_local = 0; | |
697 | int got_initial_max_stream_data_bidi_remote = 0; | |
698 | int got_initial_max_stream_data_uni = 0; | |
699 | int got_initial_max_streams_bidi = 0; | |
700 | int got_initial_max_streams_uni = 0; | |
701 | int got_ack_delay_exp = 0; | |
702 | int got_max_ack_delay = 0; | |
703 | int got_max_udp_payload_size = 0; | |
704 | int got_max_idle_timeout = 0; | |
705 | int got_active_conn_id_limit = 0; | |
706 | QUIC_CONN_ID cid; | |
3c567a52 | 707 | const char *reason = "bad transport parameter"; |
f538b421 HL |
708 | |
709 | if (ch->got_remote_transport_params) | |
710 | goto malformed; | |
711 | ||
712 | if (!PACKET_buf_init(&pkt, params, params_len)) | |
713 | return 0; | |
714 | ||
715 | while (PACKET_remaining(&pkt) > 0) { | |
716 | if (!ossl_quic_wire_peek_transport_param(&pkt, &id)) | |
717 | goto malformed; | |
718 | ||
719 | switch (id) { | |
75b2920a | 720 | case QUIC_TPARAM_ORIG_DCID: |
3c567a52 HL |
721 | if (got_orig_dcid) { |
722 | reason = TP_REASON_DUP("ORIG_DCID"); | |
723 | goto malformed; | |
724 | } | |
725 | ||
726 | if (ch->is_server) { | |
727 | reason = TP_REASON_SERVER_ONLY("ORIG_DCID"); | |
75b2920a | 728 | goto malformed; |
3c567a52 | 729 | } |
75b2920a | 730 | |
3c567a52 HL |
731 | if (!ossl_quic_wire_decode_transport_param_cid(&pkt, NULL, &cid)) { |
732 | reason = TP_REASON_MALFORMED("ORIG_DCID"); | |
75b2920a | 733 | goto malformed; |
3c567a52 | 734 | } |
75b2920a HL |
735 | |
736 | /* Must match our initial DCID. */ | |
3c567a52 HL |
737 | if (!ossl_quic_conn_id_eq(&ch->init_dcid, &cid)) { |
738 | reason = TP_REASON_EXPECTED_VALUE("ORIG_DCID"); | |
75b2920a | 739 | goto malformed; |
3c567a52 | 740 | } |
75b2920a HL |
741 | |
742 | got_orig_dcid = 1; | |
743 | break; | |
744 | ||
745 | case QUIC_TPARAM_RETRY_SCID: | |
3c567a52 HL |
746 | if (ch->is_server) { |
747 | reason = TP_REASON_SERVER_ONLY("RETRY_SCID"); | |
748 | goto malformed; | |
749 | } | |
750 | ||
751 | if (got_retry_scid) { | |
752 | reason = TP_REASON_DUP("RETRY_SCID"); | |
75b2920a | 753 | goto malformed; |
3c567a52 HL |
754 | } |
755 | ||
756 | if (!ch->doing_retry) { | |
757 | reason = TP_REASON_NOT_RETRY("RETRY_SCID"); | |
758 | goto malformed; | |
759 | } | |
75b2920a | 760 | |
3c567a52 HL |
761 | if (!ossl_quic_wire_decode_transport_param_cid(&pkt, NULL, &cid)) { |
762 | reason = TP_REASON_MALFORMED("RETRY_SCID"); | |
75b2920a | 763 | goto malformed; |
3c567a52 | 764 | } |
75b2920a HL |
765 | |
766 | /* Must match Retry packet SCID. */ | |
3c567a52 HL |
767 | if (!ossl_quic_conn_id_eq(&ch->retry_scid, &cid)) { |
768 | reason = TP_REASON_EXPECTED_VALUE("RETRY_SCID"); | |
75b2920a | 769 | goto malformed; |
3c567a52 | 770 | } |
75b2920a HL |
771 | |
772 | got_retry_scid = 1; | |
773 | break; | |
774 | ||
775 | case QUIC_TPARAM_INITIAL_SCID: | |
3c567a52 | 776 | if (got_initial_scid) { |
75b2920a | 777 | /* must not appear more than once */ |
3c567a52 | 778 | reason = TP_REASON_DUP("INITIAL_SCID"); |
75b2920a | 779 | goto malformed; |
3c567a52 | 780 | } |
75b2920a | 781 | |
3c567a52 HL |
782 | if (!ossl_quic_wire_decode_transport_param_cid(&pkt, NULL, &cid)) { |
783 | reason = TP_REASON_MALFORMED("INITIAL_SCID"); | |
75b2920a | 784 | goto malformed; |
3c567a52 | 785 | } |
75b2920a HL |
786 | |
787 | /* Must match SCID of first Initial packet from server. */ | |
3c567a52 HL |
788 | if (!ossl_quic_conn_id_eq(&ch->init_scid, &cid)) { |
789 | reason = TP_REASON_EXPECTED_VALUE("INITIAL_SCID"); | |
75b2920a | 790 | goto malformed; |
3c567a52 | 791 | } |
75b2920a HL |
792 | |
793 | got_initial_scid = 1; | |
794 | break; | |
795 | ||
796 | case QUIC_TPARAM_INITIAL_MAX_DATA: | |
3c567a52 | 797 | if (got_initial_max_data) { |
75b2920a | 798 | /* must not appear more than once */ |
3c567a52 | 799 | reason = TP_REASON_DUP("INITIAL_MAX_DATA"); |
75b2920a | 800 | goto malformed; |
3c567a52 | 801 | } |
75b2920a | 802 | |
3c567a52 HL |
803 | if (!ossl_quic_wire_decode_transport_param_int(&pkt, &id, &v)) { |
804 | reason = TP_REASON_MALFORMED("INITIAL_MAX_DATA"); | |
75b2920a | 805 | goto malformed; |
3c567a52 | 806 | } |
75b2920a HL |
807 | |
808 | ossl_quic_txfc_bump_cwm(&ch->conn_txfc, v); | |
809 | got_initial_max_data = 1; | |
810 | break; | |
811 | ||
812 | case QUIC_TPARAM_INITIAL_MAX_STREAM_DATA_BIDI_LOCAL: | |
3c567a52 | 813 | if (got_initial_max_stream_data_bidi_local) { |
75b2920a | 814 | /* must not appear more than once */ |
3c567a52 | 815 | reason = TP_REASON_DUP("INITIAL_MAX_STREAM_DATA_BIDI_LOCAL"); |
75b2920a | 816 | goto malformed; |
3c567a52 | 817 | } |
75b2920a | 818 | |
3c567a52 HL |
819 | if (!ossl_quic_wire_decode_transport_param_int(&pkt, &id, &v)) { |
820 | reason = TP_REASON_MALFORMED("INITIAL_MAX_STREAM_DATA_BIDI_LOCAL"); | |
75b2920a | 821 | goto malformed; |
3c567a52 | 822 | } |
f538b421 HL |
823 | |
824 | /* | |
75b2920a HL |
825 | * This is correct; the BIDI_LOCAL TP governs streams created by |
826 | * the endpoint which sends the TP, i.e., our peer. | |
f538b421 | 827 | */ |
75b2920a HL |
828 | ch->init_max_stream_data_bidi_remote = v; |
829 | got_initial_max_stream_data_bidi_local = 1; | |
830 | break; | |
831 | ||
832 | case QUIC_TPARAM_INITIAL_MAX_STREAM_DATA_BIDI_REMOTE: | |
3c567a52 | 833 | if (got_initial_max_stream_data_bidi_remote) { |
75b2920a | 834 | /* must not appear more than once */ |
3c567a52 | 835 | reason = TP_REASON_DUP("INITIAL_MAX_STREAM_DATA_BIDI_REMOTE"); |
75b2920a | 836 | goto malformed; |
3c567a52 | 837 | } |
75b2920a | 838 | |
3c567a52 HL |
839 | if (!ossl_quic_wire_decode_transport_param_int(&pkt, &id, &v)) { |
840 | reason = TP_REASON_MALFORMED("INITIAL_MAX_STREAM_DATA_BIDI_REMOTE"); | |
75b2920a | 841 | goto malformed; |
3c567a52 | 842 | } |
75b2920a HL |
843 | |
844 | /* | |
845 | * This is correct; the BIDI_REMOTE TP governs streams created | |
846 | * by the endpoint which receives the TP, i.e., us. | |
847 | */ | |
848 | ch->init_max_stream_data_bidi_local = v; | |
849 | ||
850 | /* Apply to stream 0. */ | |
851 | ossl_quic_txfc_bump_cwm(&ch->stream0->txfc, v); | |
852 | got_initial_max_stream_data_bidi_remote = 1; | |
853 | break; | |
854 | ||
855 | case QUIC_TPARAM_INITIAL_MAX_STREAM_DATA_UNI: | |
3c567a52 | 856 | if (got_initial_max_stream_data_uni) { |
75b2920a | 857 | /* must not appear more than once */ |
3c567a52 | 858 | reason = TP_REASON_DUP("INITIAL_MAX_STREAM_DATA_UNI"); |
75b2920a | 859 | goto malformed; |
3c567a52 | 860 | } |
75b2920a | 861 | |
3c567a52 HL |
862 | if (!ossl_quic_wire_decode_transport_param_int(&pkt, &id, &v)) { |
863 | reason = TP_REASON_MALFORMED("INITIAL_MAX_STREAM_DATA_UNI"); | |
75b2920a | 864 | goto malformed; |
3c567a52 | 865 | } |
75b2920a HL |
866 | |
867 | ch->init_max_stream_data_uni_remote = v; | |
868 | got_initial_max_stream_data_uni = 1; | |
869 | break; | |
870 | ||
871 | case QUIC_TPARAM_ACK_DELAY_EXP: | |
3c567a52 | 872 | if (got_ack_delay_exp) { |
75b2920a | 873 | /* must not appear more than once */ |
3c567a52 | 874 | reason = TP_REASON_DUP("ACK_DELAY_EXP"); |
75b2920a | 875 | goto malformed; |
3c567a52 | 876 | } |
75b2920a HL |
877 | |
878 | if (!ossl_quic_wire_decode_transport_param_int(&pkt, &id, &v) | |
3c567a52 HL |
879 | || v > QUIC_MAX_ACK_DELAY_EXP) { |
880 | reason = TP_REASON_MALFORMED("ACK_DELAY_EXP"); | |
75b2920a | 881 | goto malformed; |
3c567a52 | 882 | } |
75b2920a HL |
883 | |
884 | ch->rx_ack_delay_exp = (unsigned char)v; | |
885 | got_ack_delay_exp = 1; | |
886 | break; | |
887 | ||
888 | case QUIC_TPARAM_MAX_ACK_DELAY: | |
3c567a52 | 889 | if (got_max_ack_delay) { |
75b2920a | 890 | /* must not appear more than once */ |
3c567a52 | 891 | reason = TP_REASON_DUP("MAX_ACK_DELAY"); |
75b2920a | 892 | return 0; |
3c567a52 | 893 | } |
75b2920a HL |
894 | |
895 | if (!ossl_quic_wire_decode_transport_param_int(&pkt, &id, &v) | |
3c567a52 HL |
896 | || v >= (((uint64_t)1) << 14)) { |
897 | reason = TP_REASON_MALFORMED("MAX_ACK_DELAY"); | |
75b2920a | 898 | goto malformed; |
3c567a52 | 899 | } |
75b2920a HL |
900 | |
901 | ch->rx_max_ack_delay = v; | |
902 | got_max_ack_delay = 1; | |
903 | break; | |
904 | ||
905 | case QUIC_TPARAM_INITIAL_MAX_STREAMS_BIDI: | |
3c567a52 | 906 | if (got_initial_max_streams_bidi) { |
75b2920a | 907 | /* must not appear more than once */ |
3c567a52 | 908 | reason = TP_REASON_DUP("INITIAL_MAX_STREAMS_BIDI"); |
75b2920a | 909 | return 0; |
3c567a52 | 910 | } |
75b2920a HL |
911 | |
912 | if (!ossl_quic_wire_decode_transport_param_int(&pkt, &id, &v) | |
3c567a52 HL |
913 | || v > (((uint64_t)1) << 60)) { |
914 | reason = TP_REASON_MALFORMED("INITIAL_MAX_STREAMS_BIDI"); | |
75b2920a | 915 | goto malformed; |
3c567a52 | 916 | } |
75b2920a HL |
917 | |
918 | assert(ch->max_local_streams_bidi == 0); | |
919 | ch->max_local_streams_bidi = v; | |
920 | got_initial_max_streams_bidi = 1; | |
921 | break; | |
922 | ||
923 | case QUIC_TPARAM_INITIAL_MAX_STREAMS_UNI: | |
3c567a52 | 924 | if (got_initial_max_streams_uni) { |
75b2920a | 925 | /* must not appear more than once */ |
3c567a52 | 926 | reason = TP_REASON_DUP("INITIAL_MAX_STREAMS_UNI"); |
75b2920a | 927 | goto malformed; |
3c567a52 | 928 | } |
75b2920a HL |
929 | |
930 | if (!ossl_quic_wire_decode_transport_param_int(&pkt, &id, &v) | |
3c567a52 HL |
931 | || v > (((uint64_t)1) << 60)) { |
932 | reason = TP_REASON_MALFORMED("INITIAL_MAX_STREAMS_UNI"); | |
75b2920a | 933 | goto malformed; |
3c567a52 | 934 | } |
75b2920a HL |
935 | |
936 | assert(ch->max_local_streams_uni == 0); | |
937 | ch->max_local_streams_uni = v; | |
938 | got_initial_max_streams_uni = 1; | |
939 | break; | |
940 | ||
941 | case QUIC_TPARAM_MAX_IDLE_TIMEOUT: | |
3c567a52 | 942 | if (got_max_idle_timeout) { |
75b2920a | 943 | /* must not appear more than once */ |
3c567a52 | 944 | reason = TP_REASON_DUP("MAX_IDLE_TIMEOUT"); |
75b2920a | 945 | goto malformed; |
3c567a52 | 946 | } |
75b2920a | 947 | |
3c567a52 HL |
948 | if (!ossl_quic_wire_decode_transport_param_int(&pkt, &id, &v)) { |
949 | reason = TP_REASON_MALFORMED("MAX_IDLE_TIMEOUT"); | |
75b2920a | 950 | goto malformed; |
3c567a52 | 951 | } |
75b2920a HL |
952 | |
953 | if (v < ch->max_idle_timeout) | |
954 | ch->max_idle_timeout = v; | |
955 | ||
956 | ch_update_idle(ch); | |
957 | got_max_idle_timeout = 1; | |
958 | break; | |
f538b421 | 959 | |
75b2920a | 960 | case QUIC_TPARAM_MAX_UDP_PAYLOAD_SIZE: |
3c567a52 | 961 | if (got_max_udp_payload_size) { |
75b2920a | 962 | /* must not appear more than once */ |
3c567a52 | 963 | reason = TP_REASON_DUP("MAX_UDP_PAYLOAD_SIZE"); |
75b2920a | 964 | goto malformed; |
3c567a52 | 965 | } |
f538b421 | 966 | |
75b2920a | 967 | if (!ossl_quic_wire_decode_transport_param_int(&pkt, &id, &v) |
3c567a52 HL |
968 | || v < QUIC_MIN_INITIAL_DGRAM_LEN) { |
969 | reason = TP_REASON_MALFORMED("MAX_UDP_PAYLOAD_SIZE"); | |
75b2920a | 970 | goto malformed; |
3c567a52 | 971 | } |
75b2920a HL |
972 | |
973 | ch->rx_max_udp_payload_size = v; | |
974 | got_max_udp_payload_size = 1; | |
975 | break; | |
976 | ||
977 | case QUIC_TPARAM_ACTIVE_CONN_ID_LIMIT: | |
3c567a52 | 978 | if (got_active_conn_id_limit) { |
75b2920a | 979 | /* must not appear more than once */ |
3c567a52 | 980 | reason = TP_REASON_DUP("ACTIVE_CONN_ID_LIMIT"); |
75b2920a | 981 | goto malformed; |
3c567a52 | 982 | } |
75b2920a HL |
983 | |
984 | if (!ossl_quic_wire_decode_transport_param_int(&pkt, &id, &v) | |
3c567a52 HL |
985 | || v < QUIC_MIN_ACTIVE_CONN_ID_LIMIT) { |
986 | reason = TP_REASON_MALFORMED("ACTIVE_CONN_ID_LIMIT"); | |
75b2920a | 987 | goto malformed; |
3c567a52 | 988 | } |
75b2920a HL |
989 | |
990 | ch->rx_active_conn_id_limit = v; | |
991 | got_active_conn_id_limit = 1; | |
992 | break; | |
993 | ||
3c567a52 HL |
994 | case QUIC_TPARAM_STATELESS_RESET_TOKEN: |
995 | /* TODO(QUIC): Handle stateless reset tokens. */ | |
996 | /* | |
997 | * We ignore these for now, but we must ensure a client doesn't | |
998 | * send them. | |
999 | */ | |
1000 | if (ch->is_server) { | |
1001 | reason = TP_REASON_SERVER_ONLY("STATELESS_RESET_TOKEN"); | |
1002 | goto malformed; | |
1003 | } | |
1004 | ||
1005 | body = ossl_quic_wire_decode_transport_param_bytes(&pkt, &id, &len); | |
1006 | if (body == NULL || len != QUIC_STATELESS_RESET_TOKEN_LEN) { | |
1007 | reason = TP_REASON_MALFORMED("STATELESS_RESET_TOKEN"); | |
1008 | goto malformed; | |
1009 | } | |
1010 | ||
1011 | break; | |
1012 | ||
1013 | case QUIC_TPARAM_PREFERRED_ADDR: | |
1014 | /* TODO(QUIC): Handle preferred address. */ | |
1015 | if (ch->is_server) { | |
1016 | reason = TP_REASON_SERVER_ONLY("PREFERRED_ADDR"); | |
1017 | goto malformed; | |
1018 | } | |
1019 | ||
1020 | body = ossl_quic_wire_decode_transport_param_bytes(&pkt, &id, &len); | |
1021 | if (body == NULL) { | |
1022 | reason = TP_REASON_MALFORMED("PREFERRED_ADDR"); | |
1023 | goto malformed; | |
1024 | } | |
1025 | ||
1026 | break; | |
75b2920a HL |
1027 | |
1028 | case QUIC_TPARAM_DISABLE_ACTIVE_MIGRATION: | |
1029 | /* We do not currently handle migration, so nothing to do. */ | |
1030 | default: | |
1031 | /* Skip over and ignore. */ | |
1032 | body = ossl_quic_wire_decode_transport_param_bytes(&pkt, &id, | |
1033 | &len); | |
1034 | if (body == NULL) | |
1035 | goto malformed; | |
1036 | ||
1037 | break; | |
f538b421 HL |
1038 | } |
1039 | } | |
1040 | ||
3c567a52 HL |
1041 | if (!got_initial_scid) { |
1042 | reason = TP_REASON_REQUIRED("INITIAL_SCID"); | |
f538b421 | 1043 | goto malformed; |
3c567a52 HL |
1044 | } |
1045 | ||
1046 | if (!ch->is_server) { | |
1047 | if (!got_orig_dcid) { | |
1048 | reason = TP_REASON_REQUIRED("ORIG_DCID"); | |
1049 | goto malformed; | |
1050 | } | |
1051 | ||
1052 | if (ch->doing_retry && !got_retry_scid) { | |
1053 | reason = TP_REASON_REQUIRED("RETRY_SCID"); | |
1054 | goto malformed; | |
1055 | } | |
1056 | } | |
f538b421 HL |
1057 | |
1058 | ch->got_remote_transport_params = 1; | |
1059 | ||
1060 | if (got_initial_max_data || got_initial_max_stream_data_bidi_remote | |
1061 | || got_initial_max_streams_bidi || got_initial_max_streams_uni) | |
1062 | /* If FC credit was bumped, we may now be able to send. */ | |
1063 | ossl_quic_stream_map_update_state(&ch->qsm, ch->stream0); | |
1064 | ||
1065 | /* If we are a server, we now generate our own transport parameters. */ | |
1066 | if (ch->is_server && !ch_generate_transport_params(ch)) { | |
1067 | ossl_quic_channel_raise_protocol_error(ch, QUIC_ERR_INTERNAL_ERROR, 0, | |
1068 | "internal error"); | |
1069 | return 0; | |
1070 | } | |
1071 | ||
1072 | return 1; | |
1073 | ||
1074 | malformed: | |
1075 | ossl_quic_channel_raise_protocol_error(ch, QUIC_ERR_TRANSPORT_PARAMETER_ERROR, | |
3c567a52 | 1076 | 0, reason); |
f538b421 HL |
1077 | return 0; |
1078 | } | |
1079 | ||
1080 | /* | |
1081 | * Called when we want to generate transport parameters. This is called | |
1082 | * immediately at instantiation time for a client and after we receive the | |
1083 | * client's transport parameters for a server. | |
1084 | */ | |
1085 | static int ch_generate_transport_params(QUIC_CHANNEL *ch) | |
1086 | { | |
1087 | int ok = 0; | |
1088 | BUF_MEM *buf_mem = NULL; | |
1089 | WPACKET wpkt; | |
1090 | int wpkt_valid = 0; | |
1091 | size_t buf_len = 0; | |
1092 | ||
1093 | if (ch->local_transport_params != NULL) | |
1094 | goto err; | |
1095 | ||
1096 | if ((buf_mem = BUF_MEM_new()) == NULL) | |
1097 | goto err; | |
1098 | ||
1099 | if (!WPACKET_init(&wpkt, buf_mem)) | |
1100 | goto err; | |
1101 | ||
1102 | wpkt_valid = 1; | |
1103 | ||
1104 | if (ossl_quic_wire_encode_transport_param_bytes(&wpkt, QUIC_TPARAM_DISABLE_ACTIVE_MIGRATION, | |
1105 | NULL, 0) == NULL) | |
1106 | goto err; | |
1107 | ||
3c567a52 HL |
1108 | if (ch->is_server) { |
1109 | if (!ossl_quic_wire_encode_transport_param_cid(&wpkt, QUIC_TPARAM_ORIG_DCID, | |
1110 | &ch->init_dcid)) | |
1111 | goto err; | |
1112 | ||
1113 | if (!ossl_quic_wire_encode_transport_param_cid(&wpkt, QUIC_TPARAM_INITIAL_SCID, | |
1114 | &ch->cur_local_dcid)) | |
1115 | goto err; | |
1116 | } else { | |
1117 | /* Client always uses an empty SCID. */ | |
1118 | if (ossl_quic_wire_encode_transport_param_bytes(&wpkt, QUIC_TPARAM_INITIAL_SCID, | |
1119 | NULL, 0) == NULL) | |
1120 | goto err; | |
1121 | } | |
f538b421 HL |
1122 | |
1123 | if (!ossl_quic_wire_encode_transport_param_int(&wpkt, QUIC_TPARAM_MAX_IDLE_TIMEOUT, | |
1124 | ch->max_idle_timeout)) | |
1125 | goto err; | |
1126 | ||
1127 | if (!ossl_quic_wire_encode_transport_param_int(&wpkt, QUIC_TPARAM_MAX_UDP_PAYLOAD_SIZE, | |
1128 | QUIC_MIN_INITIAL_DGRAM_LEN)) | |
1129 | goto err; | |
1130 | ||
1131 | if (!ossl_quic_wire_encode_transport_param_int(&wpkt, QUIC_TPARAM_ACTIVE_CONN_ID_LIMIT, | |
1132 | 4)) | |
1133 | goto err; | |
1134 | ||
1135 | if (!ossl_quic_wire_encode_transport_param_int(&wpkt, QUIC_TPARAM_INITIAL_MAX_DATA, | |
1136 | ossl_quic_rxfc_get_cwm(&ch->conn_rxfc))) | |
1137 | goto err; | |
1138 | ||
1139 | /* | |
1140 | * We actually want the default CWM for a new RXFC, but here we just use | |
1141 | * stream0 as a representative specimen. TODO(QUIC): revisit this when we | |
1142 | * support multiple streams. | |
1143 | */ | |
1144 | if (!ossl_quic_wire_encode_transport_param_int(&wpkt, QUIC_TPARAM_INITIAL_MAX_STREAM_DATA_BIDI_LOCAL, | |
1145 | ossl_quic_rxfc_get_cwm(&ch->stream0->rxfc))) | |
1146 | goto err; | |
1147 | ||
1148 | if (!ossl_quic_wire_encode_transport_param_int(&wpkt, QUIC_TPARAM_INITIAL_MAX_STREAM_DATA_BIDI_REMOTE, | |
1149 | ossl_quic_rxfc_get_cwm(&ch->stream0->rxfc))) | |
1150 | goto err; | |
1151 | ||
1152 | if (!ossl_quic_wire_encode_transport_param_int(&wpkt, QUIC_TPARAM_INITIAL_MAX_STREAM_DATA_UNI, | |
1153 | ossl_quic_rxfc_get_cwm(&ch->stream0->rxfc))) | |
1154 | goto err; | |
1155 | ||
1156 | if (!ossl_quic_wire_encode_transport_param_int(&wpkt, QUIC_TPARAM_INITIAL_MAX_STREAMS_BIDI, | |
3c567a52 | 1157 | ch->is_server ? 1 : 0)) |
f538b421 HL |
1158 | goto err; |
1159 | ||
1160 | if (!ossl_quic_wire_encode_transport_param_int(&wpkt, QUIC_TPARAM_INITIAL_MAX_STREAMS_UNI, | |
1161 | 0)) | |
1162 | goto err; | |
1163 | ||
1164 | if (!WPACKET_get_total_written(&wpkt, &buf_len)) | |
1165 | goto err; | |
1166 | ||
1167 | ch->local_transport_params = (unsigned char *)buf_mem->data; | |
1168 | buf_mem->data = NULL; | |
1169 | ||
1170 | if (!WPACKET_finish(&wpkt)) | |
1171 | goto err; | |
1172 | ||
1173 | wpkt_valid = 0; | |
1174 | ||
2723d705 | 1175 | if (!ossl_quic_tls_set_transport_params(ch->qtls, ch->local_transport_params, |
f538b421 HL |
1176 | buf_len)) |
1177 | goto err; | |
1178 | ||
1179 | ok = 1; | |
1180 | err: | |
1181 | if (wpkt_valid) | |
1182 | WPACKET_cleanup(&wpkt); | |
1183 | BUF_MEM_free(buf_mem); | |
1184 | return ok; | |
1185 | } | |
1186 | ||
1187 | /* | |
1188 | * QUIC Channel: Ticker-Mutator | |
1189 | * ============================ | |
1190 | */ | |
1191 | ||
1192 | /* | |
1193 | * The central ticker function called by the reactor. This does everything, or | |
1194 | * at least everything network I/O related. Best effort - not allowed to fail | |
1195 | * "loudly". | |
1196 | */ | |
1197 | static void ch_tick(QUIC_TICK_RESULT *res, void *arg) | |
1198 | { | |
1199 | OSSL_TIME now, deadline; | |
1200 | QUIC_CHANNEL *ch = arg; | |
1201 | ||
1202 | /* | |
1203 | * When we tick the QUIC connection, we do everything we need to do | |
1204 | * periodically. In order, we: | |
1205 | * | |
1206 | * - handle any incoming data from the network; | |
1207 | * - handle any timer events which are due to fire (ACKM, etc.) | |
1208 | * - write any data to the network due to be sent, to the extent | |
1209 | * possible; | |
1210 | * - determine the time at which we should next be ticked. | |
1211 | */ | |
1212 | ||
1213 | /* If we are in the TERMINATED state, there is nothing to do. */ | |
c12e1113 | 1214 | if (ossl_quic_channel_is_terminated(ch)) { |
b639475a HL |
1215 | res->net_read_desired = 0; |
1216 | res->net_write_desired = 0; | |
1217 | res->tick_deadline = ossl_time_infinite(); | |
f538b421 HL |
1218 | return; |
1219 | } | |
1220 | ||
1221 | /* | |
1222 | * If we are in the TERMINATING state, check if the terminating timer has | |
1223 | * expired. | |
1224 | */ | |
c12e1113 | 1225 | if (ossl_quic_channel_is_terminating(ch)) { |
f538b421 HL |
1226 | now = ossl_time_now(); |
1227 | ||
1228 | if (ossl_time_compare(now, ch->terminate_deadline) >= 0) { | |
1229 | ch_on_terminating_timeout(ch); | |
b639475a HL |
1230 | res->net_read_desired = 0; |
1231 | res->net_write_desired = 0; | |
1232 | res->tick_deadline = ossl_time_infinite(); | |
f538b421 HL |
1233 | return; /* abort normal processing, nothing to do */ |
1234 | } | |
1235 | } | |
1236 | ||
3bf4dc8c HL |
1237 | /* Handle any incoming data from network. */ |
1238 | ch_rx_pre(ch); | |
1239 | ||
4e64437a | 1240 | do { |
3bf4dc8c | 1241 | /* Process queued incoming packets. */ |
4e64437a | 1242 | ch_rx(ch); |
f538b421 | 1243 | |
4e64437a HL |
1244 | /* |
1245 | * Allow the handshake layer to check for any new incoming data and generate | |
1246 | * new outgoing data. | |
1247 | */ | |
92282a17 | 1248 | ch->have_new_rx_secret = 0; |
2723d705 | 1249 | ossl_quic_tls_tick(ch->qtls); |
4e64437a HL |
1250 | |
1251 | /* | |
1252 | * If the handshake layer gave us a new secret, we need to do RX again | |
1253 | * because packets that were not previously processable and were | |
1254 | * deferred might now be processable. | |
9f0ade7c HL |
1255 | * |
1256 | * TODO(QUIC): Consider handling this in the yield_secret callback. | |
4e64437a | 1257 | */ |
92282a17 | 1258 | } while (ch->have_new_rx_secret); |
f538b421 HL |
1259 | |
1260 | /* | |
1261 | * Handle any timer events which are due to fire; namely, the loss detection | |
1262 | * deadline and the idle timeout. | |
1263 | * | |
1264 | * ACKM ACK generation deadline is polled by TXP, so we don't need to handle | |
1265 | * it here. | |
1266 | */ | |
1267 | now = ossl_time_now(); | |
1268 | if (ossl_time_compare(now, ch->idle_deadline) >= 0) { | |
1269 | /* | |
1270 | * Idle timeout differs from normal protocol violation because we do not | |
1271 | * send a CONN_CLOSE frame; go straight to TERMINATED. | |
1272 | */ | |
1273 | ch_on_idle_timeout(ch); | |
b639475a HL |
1274 | res->net_read_desired = 0; |
1275 | res->net_write_desired = 0; | |
1276 | res->tick_deadline = ossl_time_infinite(); | |
f538b421 HL |
1277 | return; |
1278 | } | |
1279 | ||
1280 | deadline = ossl_ackm_get_loss_detection_deadline(ch->ackm); | |
1281 | if (!ossl_time_is_zero(deadline) && ossl_time_compare(now, deadline) >= 0) | |
1282 | ossl_ackm_on_timeout(ch->ackm); | |
1283 | ||
1284 | /* Write any data to the network due to be sent. */ | |
1285 | ch_tx(ch); | |
1286 | ||
1287 | /* Determine the time at which we should next be ticked. */ | |
1288 | res->tick_deadline = ch_determine_next_tick_deadline(ch); | |
1289 | ||
df15e990 HL |
1290 | /* |
1291 | * Always process network input unless we are now terminated. | |
1292 | * Although we had not terminated at the beginning of this tick, network | |
1293 | * errors in ch_rx_pre() or ch_tx() may have caused us to transition to the | |
1294 | * Terminated state. | |
1295 | */ | |
c12e1113 | 1296 | res->net_read_desired = !ossl_quic_channel_is_terminated(ch); |
f538b421 HL |
1297 | |
1298 | /* We want to write to the network if we have any in our queue. */ | |
b639475a | 1299 | res->net_write_desired |
c12e1113 | 1300 | = (!ossl_quic_channel_is_terminated(ch) |
df15e990 | 1301 | && ossl_qtx_get_queue_len_datagrams(ch->qtx) > 0); |
f538b421 HL |
1302 | } |
1303 | ||
3bf4dc8c HL |
1304 | /* Process incoming datagrams, if any. */ |
1305 | static void ch_rx_pre(QUIC_CHANNEL *ch) | |
1306 | { | |
df15e990 HL |
1307 | int ret; |
1308 | ||
b1b06da2 | 1309 | if (!ch->is_server && !ch->have_sent_any_pkt) |
3bf4dc8c HL |
1310 | return; |
1311 | ||
1312 | /* | |
1313 | * Get DEMUX to BIO_recvmmsg from the network and queue incoming datagrams | |
1314 | * to the appropriate QRX instance. | |
1315 | */ | |
df15e990 HL |
1316 | ret = ossl_quic_demux_pump(ch->demux); |
1317 | if (ret == QUIC_DEMUX_PUMP_RES_PERMANENT_FAIL) | |
1318 | /* | |
1319 | * We don't care about transient failure, but permanent failure means we | |
1320 | * should tear down the connection as though a protocol violation | |
1321 | * occurred. Skip straight to the Terminating state as there is no point | |
1322 | * trying to send CONNECTION_CLOSE frames if the network BIO is not | |
1323 | * operating correctly. | |
1324 | */ | |
1325 | ch_raise_net_error(ch); | |
3bf4dc8c HL |
1326 | } |
1327 | ||
1328 | /* Process queued incoming packets and handle frames, if any. */ | |
f538b421 HL |
1329 | static int ch_rx(QUIC_CHANNEL *ch) |
1330 | { | |
1331 | int handled_any = 0; | |
1332 | ||
b1b06da2 | 1333 | if (!ch->is_server && !ch->have_sent_any_pkt) |
f538b421 HL |
1334 | /* |
1335 | * We have not sent anything yet, therefore there is no need to check | |
75b2920a | 1336 | * for incoming data. |
f538b421 HL |
1337 | */ |
1338 | return 1; | |
1339 | ||
f538b421 HL |
1340 | for (;;) { |
1341 | assert(ch->qrx_pkt == NULL); | |
1342 | ||
1343 | if (!ossl_qrx_read_pkt(ch->qrx, &ch->qrx_pkt)) | |
1344 | break; | |
1345 | ||
1346 | if (!handled_any) | |
1347 | ch_update_idle(ch); | |
1348 | ||
1349 | ch_rx_handle_packet(ch); /* best effort */ | |
1350 | ||
1351 | /* | |
1352 | * Regardless of the outcome of frame handling, unref the packet. | |
1353 | * This will free the packet unless something added another | |
1354 | * reference to it during frame processing. | |
1355 | */ | |
1356 | ossl_qrx_pkt_release(ch->qrx_pkt); | |
1357 | ch->qrx_pkt = NULL; | |
1358 | ||
1359 | handled_any = 1; | |
1360 | } | |
1361 | ||
1362 | /* | |
1363 | * When in TERMINATING - CLOSING, generate a CONN_CLOSE frame whenever we | |
1364 | * process one or more incoming packets. | |
1365 | */ | |
1366 | if (handled_any && ch->state == QUIC_CHANNEL_STATE_TERMINATING_CLOSING) | |
1367 | ch->conn_close_queued = 1; | |
1368 | ||
1369 | return 1; | |
1370 | } | |
1371 | ||
1372 | /* Handles the packet currently in ch->qrx_pkt->hdr. */ | |
1373 | static void ch_rx_handle_packet(QUIC_CHANNEL *ch) | |
1374 | { | |
1375 | uint32_t enc_level; | |
1376 | ||
1377 | assert(ch->qrx_pkt != NULL); | |
1378 | ||
1379 | if (ossl_quic_pkt_type_is_encrypted(ch->qrx_pkt->hdr->type)) { | |
1380 | if (!ch->have_received_enc_pkt) { | |
1381 | ch->init_scid = ch->qrx_pkt->hdr->src_conn_id; | |
1382 | ch->have_received_enc_pkt = 1; | |
1383 | ||
1384 | /* | |
1385 | * We change to using the SCID in the first Initial packet as the | |
1386 | * DCID. | |
1387 | */ | |
1388 | ossl_quic_tx_packetiser_set_cur_dcid(ch->txp, &ch->init_scid); | |
1389 | } | |
1390 | ||
1391 | enc_level = ossl_quic_pkt_type_to_enc_level(ch->qrx_pkt->hdr->type); | |
1392 | if ((ch->el_discarded & (1U << enc_level)) != 0) | |
1393 | /* Do not process packets from ELs we have already discarded. */ | |
1394 | return; | |
1395 | } | |
1396 | ||
1397 | /* Handle incoming packet. */ | |
1398 | switch (ch->qrx_pkt->hdr->type) { | |
75b2920a | 1399 | case QUIC_PKT_TYPE_RETRY: |
b1b06da2 | 1400 | if (ch->doing_retry || ch->is_server) |
75b2920a HL |
1401 | /* |
1402 | * It is not allowed to ask a client to do a retry more than | |
b1b06da2 | 1403 | * once. Clients may not send retries. |
75b2920a HL |
1404 | */ |
1405 | return; | |
f538b421 | 1406 | |
75b2920a HL |
1407 | if (ch->qrx_pkt->hdr->len <= QUIC_RETRY_INTEGRITY_TAG_LEN) |
1408 | /* Packets with zero-length Retry Tokens are invalid. */ | |
1409 | return; | |
f538b421 | 1410 | |
75b2920a HL |
1411 | /* |
1412 | * TODO(QUIC): Theoretically this should probably be in the QRX. | |
1413 | * However because validation is dependent on context (namely the | |
1414 | * client's initial DCID) we can't do this cleanly. In the future we | |
1415 | * should probably add a callback to the QRX to let it call us (via | |
1416 | * the DEMUX) and ask us about the correct original DCID, rather | |
1417 | * than allow the QRX to emit a potentially malformed packet to the | |
1418 | * upper layers. However, special casing this will do for now. | |
1419 | */ | |
1420 | if (!ossl_quic_validate_retry_integrity_tag(ch->libctx, | |
1421 | ch->propq, | |
1422 | ch->qrx_pkt->hdr, | |
1423 | &ch->init_dcid)) | |
1424 | /* Malformed retry packet, ignore. */ | |
1425 | return; | |
f538b421 | 1426 | |
75b2920a HL |
1427 | ch_retry(ch, ch->qrx_pkt->hdr->data, |
1428 | ch->qrx_pkt->hdr->len - QUIC_RETRY_INTEGRITY_TAG_LEN, | |
1429 | &ch->qrx_pkt->hdr->src_conn_id); | |
1430 | break; | |
f538b421 | 1431 | |
75b2920a | 1432 | case QUIC_PKT_TYPE_0RTT: |
b1b06da2 HL |
1433 | if (!ch->is_server) |
1434 | /* Clients should never receive 0-RTT packets. */ | |
1435 | return; | |
1436 | ||
1437 | /* | |
1438 | * TODO(QUIC): Implement 0-RTT on the server side. We currently do | |
1439 | * not need to implement this as a client can only do 0-RTT if we | |
1440 | * have given it permission to in a previous session. | |
1441 | */ | |
75b2920a HL |
1442 | break; |
1443 | ||
b1b06da2 HL |
1444 | case QUIC_PKT_TYPE_INITIAL: |
1445 | case QUIC_PKT_TYPE_HANDSHAKE: | |
1446 | case QUIC_PKT_TYPE_1RTT: | |
75b2920a HL |
1447 | if (ch->qrx_pkt->hdr->type == QUIC_PKT_TYPE_HANDSHAKE) |
1448 | /* | |
1449 | * We automatically drop INITIAL EL keys when first successfully | |
1450 | * decrypting a HANDSHAKE packet, as per the RFC. | |
1451 | */ | |
1452 | ch_discard_el(ch, QUIC_ENC_LEVEL_INITIAL); | |
1453 | ||
1454 | /* This packet contains frames, pass to the RXDP. */ | |
1455 | ossl_quic_handle_frames(ch, ch->qrx_pkt); /* best effort */ | |
1456 | break; | |
b1b06da2 HL |
1457 | |
1458 | default: | |
1459 | assert(0); | |
1460 | break; | |
1461 | } | |
1462 | } | |
1463 | ||
1464 | /* | |
1465 | * This is called by the demux when we get a packet not destined for any known | |
1466 | * DCID. | |
1467 | */ | |
1468 | static void ch_default_packet_handler(QUIC_URXE *e, void *arg) | |
1469 | { | |
1470 | QUIC_CHANNEL *ch = arg; | |
1471 | PACKET pkt; | |
1472 | QUIC_PKT_HDR hdr; | |
1473 | ||
1474 | if (!ossl_assert(ch->is_server)) | |
1475 | goto undesirable; | |
1476 | ||
1477 | /* | |
1478 | * We only support one connection to our server currently, so if we already | |
1479 | * started one, ignore any new connection attempts. | |
1480 | */ | |
1481 | if (ch->state != QUIC_CHANNEL_STATE_IDLE) | |
1482 | goto undesirable; | |
1483 | ||
1484 | /* | |
1485 | * We have got a packet for an unknown DCID. This might be an attempt to | |
1486 | * open a new connection. | |
1487 | */ | |
1488 | if (e->data_len < QUIC_MIN_INITIAL_DGRAM_LEN) | |
1489 | goto undesirable; | |
1490 | ||
1491 | if (!PACKET_buf_init(&pkt, ossl_quic_urxe_data(e), e->data_len)) | |
091f532e | 1492 | goto err; |
b1b06da2 HL |
1493 | |
1494 | /* | |
1495 | * We set short_conn_id_len to SIZE_MAX here which will cause the decode | |
1496 | * operation to fail if we get a 1-RTT packet. This is fine since we only | |
1497 | * care about Initial packets. | |
1498 | */ | |
1499 | if (!ossl_quic_wire_decode_pkt_hdr(&pkt, SIZE_MAX, 1, &hdr, NULL)) | |
1500 | goto undesirable; | |
1501 | ||
1502 | switch (hdr.version) { | |
1503 | case QUIC_VERSION_1: | |
1504 | break; | |
1505 | ||
1506 | case QUIC_VERSION_NONE: | |
1507 | default: | |
1508 | /* Unknown version or proactive version negotiation request, bail. */ | |
1509 | /* TODO(QUIC): Handle version negotiation on server side */ | |
1510 | goto undesirable; | |
f538b421 | 1511 | } |
b1b06da2 HL |
1512 | |
1513 | /* | |
1514 | * We only care about Initial packets which might be trying to establish a | |
1515 | * connection. | |
1516 | */ | |
1517 | if (hdr.type != QUIC_PKT_TYPE_INITIAL) | |
1518 | goto undesirable; | |
1519 | ||
1520 | /* | |
1521 | * Assume this is a valid attempt to initiate a connection. | |
1522 | * | |
1523 | * We do not register the DCID in the initial packet we received and that | |
1524 | * DCID is not actually used again, thus after provisioning the correct | |
1525 | * Initial keys derived from it (which is done in the call below) we pass | |
1526 | * the received packet directly to the QRX so that it can process it as a | |
1527 | * one-time thing, instead of going through the usual DEMUX DCID-based | |
1528 | * routing. | |
1529 | */ | |
1530 | if (!ch_server_on_new_conn(ch, &e->peer, | |
1531 | &hdr.src_conn_id, | |
1532 | &hdr.dst_conn_id)) | |
091f532e | 1533 | goto err; |
b1b06da2 HL |
1534 | |
1535 | ossl_qrx_inject_urxe(ch->qrx, e); | |
1536 | return; | |
1537 | ||
091f532e HL |
1538 | err: |
1539 | ossl_quic_channel_raise_protocol_error(ch, QUIC_ERR_INTERNAL_ERROR, 0, | |
1540 | "internal error"); | |
b1b06da2 HL |
1541 | undesirable: |
1542 | ossl_quic_demux_release_urxe(ch->demux, e); | |
f538b421 HL |
1543 | } |
1544 | ||
1545 | /* Try to generate packets and if possible, flush them to the network. */ | |
1546 | static int ch_tx(QUIC_CHANNEL *ch) | |
1547 | { | |
1548 | if (ch->state == QUIC_CHANNEL_STATE_TERMINATING_CLOSING) { | |
1549 | /* | |
1550 | * While closing, only send CONN_CLOSE if we've received more traffic | |
1551 | * from the peer. Once we tell the TXP to generate CONN_CLOSE, all | |
1552 | * future calls to it generate CONN_CLOSE frames, so otherwise we would | |
1553 | * just constantly generate CONN_CLOSE frames. | |
1554 | */ | |
1555 | if (!ch->conn_close_queued) | |
1556 | return 0; | |
1557 | ||
1558 | ch->conn_close_queued = 0; | |
1559 | } | |
1560 | ||
1561 | /* | |
1562 | * Send a packet, if we need to. Best effort. The TXP consults the CC and | |
1563 | * applies any limitations imposed by it, so we don't need to do it here. | |
1564 | * | |
1565 | * Best effort. In particular if TXP fails for some reason we should still | |
1566 | * flush any queued packets which we already generated. | |
1567 | */ | |
df15e990 HL |
1568 | switch (ossl_quic_tx_packetiser_generate(ch->txp, |
1569 | TX_PACKETISER_ARCHETYPE_NORMAL)) { | |
1570 | case TX_PACKETISER_RES_SENT_PKT: | |
1571 | ch->have_sent_any_pkt = 1; /* Packet was sent */ | |
1572 | break; | |
1573 | case TX_PACKETISER_RES_NO_PKT: | |
1574 | break; /* No packet was sent */ | |
1575 | default: | |
1576 | ossl_quic_channel_raise_protocol_error(ch, QUIC_ERR_INTERNAL_ERROR, 0, | |
1577 | "internal error"); | |
1578 | break; /* Internal failure (e.g. allocation, assertion) */ | |
1579 | } | |
1580 | ||
1581 | /* Flush packets to network. */ | |
1582 | switch (ossl_qtx_flush_net(ch->qtx)) { | |
1583 | case QTX_FLUSH_NET_RES_OK: | |
1584 | case QTX_FLUSH_NET_RES_TRANSIENT_FAIL: | |
1585 | /* Best effort, done for now. */ | |
1586 | break; | |
1587 | ||
1588 | case QTX_FLUSH_NET_RES_PERMANENT_FAIL: | |
1589 | default: | |
1590 | /* Permanent underlying network BIO, start terminating. */ | |
1591 | ch_raise_net_error(ch); | |
1592 | break; | |
1593 | } | |
f538b421 | 1594 | |
f538b421 HL |
1595 | return 1; |
1596 | } | |
1597 | ||
1598 | /* Determine next tick deadline. */ | |
1599 | static OSSL_TIME ch_determine_next_tick_deadline(QUIC_CHANNEL *ch) | |
1600 | { | |
1601 | OSSL_TIME deadline; | |
1602 | uint32_t pn_space; | |
1603 | ||
c12e1113 | 1604 | if (ossl_quic_channel_is_terminated(ch)) |
df15e990 HL |
1605 | return ossl_time_infinite(); |
1606 | ||
f538b421 HL |
1607 | deadline = ossl_ackm_get_loss_detection_deadline(ch->ackm); |
1608 | if (ossl_time_is_zero(deadline)) | |
1609 | deadline = ossl_time_infinite(); | |
1610 | ||
1611 | for (pn_space = QUIC_PN_SPACE_INITIAL; pn_space < QUIC_PN_SPACE_NUM; ++pn_space) | |
1612 | deadline = ossl_time_min(deadline, | |
1613 | ossl_ackm_get_ack_deadline(ch->ackm, pn_space)); | |
1614 | ||
1615 | /* When will CC let us send more? */ | |
1616 | if (ossl_quic_tx_packetiser_has_pending(ch->txp, TX_PACKETISER_ARCHETYPE_NORMAL, | |
1617 | TX_PACKETISER_BYPASS_CC)) | |
1618 | deadline = ossl_time_min(deadline, | |
1619 | ch->cc_method->get_next_credit_time(ch->cc_data)); | |
1620 | ||
1621 | /* Is the terminating timer armed? */ | |
c12e1113 | 1622 | if (ossl_quic_channel_is_terminating(ch)) |
f538b421 HL |
1623 | deadline = ossl_time_min(deadline, |
1624 | ch->terminate_deadline); | |
1625 | else if (!ossl_time_is_infinite(ch->idle_deadline)) | |
1626 | deadline = ossl_time_min(deadline, | |
1627 | ch->idle_deadline); | |
1628 | ||
1629 | return deadline; | |
1630 | } | |
1631 | ||
1632 | /* | |
1633 | * QUIC Channel: Network BIO Configuration | |
1634 | * ======================================= | |
1635 | */ | |
1636 | ||
1637 | /* Determines whether we can support a given poll descriptor. */ | |
1638 | static int validate_poll_descriptor(const BIO_POLL_DESCRIPTOR *d) | |
1639 | { | |
1640 | if (d->type == BIO_POLL_DESCRIPTOR_TYPE_SOCK_FD && d->value.fd < 0) | |
1641 | return 0; | |
1642 | ||
1643 | return 1; | |
1644 | } | |
1645 | ||
1646 | BIO *ossl_quic_channel_get_net_rbio(QUIC_CHANNEL *ch) | |
1647 | { | |
1648 | return ch->net_rbio; | |
1649 | } | |
1650 | ||
1651 | BIO *ossl_quic_channel_get_net_wbio(QUIC_CHANNEL *ch) | |
1652 | { | |
1653 | return ch->net_wbio; | |
1654 | } | |
1655 | ||
d1ac77b1 HL |
1656 | /* |
1657 | * QUIC_CHANNEL does not ref any BIO it is provided with, nor is any ref | |
1658 | * transferred to it. The caller (i.e., QUIC_CONNECTION) is responsible for | |
1659 | * ensuring the BIO lasts until the channel is freed or the BIO is switched out | |
1660 | * for another BIO by a subsequent successful call to this function. | |
1661 | */ | |
1662 | int ossl_quic_channel_set_net_rbio(QUIC_CHANNEL *ch, BIO *net_rbio) | |
f538b421 HL |
1663 | { |
1664 | BIO_POLL_DESCRIPTOR d = {0}; | |
1665 | ||
1666 | if (ch->net_rbio == net_rbio) | |
1667 | return 1; | |
1668 | ||
1669 | if (net_rbio != NULL) { | |
1670 | if (!BIO_get_rpoll_descriptor(net_rbio, &d)) | |
1671 | /* Non-pollable BIO */ | |
1672 | d.type = BIO_POLL_DESCRIPTOR_TYPE_NONE; | |
1673 | ||
1674 | if (!validate_poll_descriptor(&d)) | |
1675 | return 0; | |
1676 | } | |
1677 | ||
1678 | ossl_quic_reactor_set_poll_r(&ch->rtor, &d); | |
f538b421 HL |
1679 | ossl_quic_demux_set_bio(ch->demux, net_rbio); |
1680 | ch->net_rbio = net_rbio; | |
1681 | return 1; | |
1682 | } | |
1683 | ||
d1ac77b1 | 1684 | int ossl_quic_channel_set_net_wbio(QUIC_CHANNEL *ch, BIO *net_wbio) |
f538b421 HL |
1685 | { |
1686 | BIO_POLL_DESCRIPTOR d = {0}; | |
1687 | ||
1688 | if (ch->net_wbio == net_wbio) | |
1689 | return 1; | |
1690 | ||
1691 | if (net_wbio != NULL) { | |
1692 | if (!BIO_get_wpoll_descriptor(net_wbio, &d)) | |
1693 | /* Non-pollable BIO */ | |
1694 | d.type = BIO_POLL_DESCRIPTOR_TYPE_NONE; | |
1695 | ||
1696 | if (!validate_poll_descriptor(&d)) | |
1697 | return 0; | |
1698 | } | |
1699 | ||
1700 | ossl_quic_reactor_set_poll_w(&ch->rtor, &d); | |
f538b421 HL |
1701 | ossl_qtx_set_bio(ch->qtx, net_wbio); |
1702 | ch->net_wbio = net_wbio; | |
1703 | return 1; | |
1704 | } | |
1705 | ||
1706 | /* | |
1707 | * QUIC Channel: Lifecycle Events | |
1708 | * ============================== | |
1709 | */ | |
f538b421 HL |
1710 | int ossl_quic_channel_start(QUIC_CHANNEL *ch) |
1711 | { | |
b1b06da2 HL |
1712 | if (ch->is_server) |
1713 | /* | |
1714 | * This is not used by the server. The server moves to active | |
1715 | * automatically on receiving an incoming connection. | |
1716 | */ | |
1717 | return 0; | |
1718 | ||
f538b421 HL |
1719 | if (ch->state != QUIC_CHANNEL_STATE_IDLE) |
1720 | /* Calls to connect are idempotent */ | |
1721 | return 1; | |
1722 | ||
1723 | /* Inform QTX of peer address. */ | |
1724 | if (!ossl_quic_tx_packetiser_set_peer(ch->txp, &ch->cur_peer_addr)) | |
1725 | return 0; | |
1726 | ||
1727 | /* Plug in secrets for the Initial EL. */ | |
1728 | if (!ossl_quic_provide_initial_secret(ch->libctx, | |
1729 | ch->propq, | |
1730 | &ch->init_dcid, | |
091f532e | 1731 | ch->is_server, |
f538b421 HL |
1732 | ch->qrx, ch->qtx)) |
1733 | return 0; | |
1734 | ||
1735 | /* Change state. */ | |
1736 | ch->state = QUIC_CHANNEL_STATE_ACTIVE; | |
1737 | ch->doing_proactive_ver_neg = 0; /* not currently supported */ | |
1738 | ||
1739 | /* Handshake layer: start (e.g. send CH). */ | |
2723d705 | 1740 | if (!ossl_quic_tls_tick(ch->qtls)) |
f538b421 HL |
1741 | return 0; |
1742 | ||
1743 | ossl_quic_reactor_tick(&ch->rtor); /* best effort */ | |
1744 | return 1; | |
1745 | } | |
1746 | ||
1747 | /* Start a locally initiated connection shutdown. */ | |
e8043229 | 1748 | void ossl_quic_channel_local_close(QUIC_CHANNEL *ch, uint64_t app_error_code) |
f538b421 HL |
1749 | { |
1750 | QUIC_TERMINATE_CAUSE tcause = {0}; | |
1751 | ||
c12e1113 | 1752 | if (ossl_quic_channel_is_term_any(ch)) |
f538b421 HL |
1753 | return; |
1754 | ||
e8043229 HL |
1755 | tcause.app = 1; |
1756 | tcause.error_code = app_error_code; | |
df15e990 | 1757 | ch_start_terminating(ch, &tcause, 0); |
f538b421 HL |
1758 | } |
1759 | ||
1760 | static void free_token(const unsigned char *buf, size_t buf_len, void *arg) | |
1761 | { | |
1762 | OPENSSL_free((unsigned char *)buf); | |
1763 | } | |
1764 | ||
1765 | /* Called when a server asks us to do a retry. */ | |
1766 | static int ch_retry(QUIC_CHANNEL *ch, | |
1767 | const unsigned char *retry_token, | |
1768 | size_t retry_token_len, | |
1769 | const QUIC_CONN_ID *retry_scid) | |
1770 | { | |
1771 | void *buf; | |
1772 | ||
1773 | /* We change to using the SCID in the Retry packet as the DCID. */ | |
1774 | if (!ossl_quic_tx_packetiser_set_cur_dcid(ch->txp, retry_scid)) | |
1775 | return 0; | |
1776 | ||
1777 | /* | |
1778 | * Now we retry. We will release the Retry packet immediately, so copy | |
1779 | * the token. | |
1780 | */ | |
e28f512f | 1781 | if ((buf = OPENSSL_memdup(retry_token, retry_token_len)) == NULL) |
f538b421 HL |
1782 | return 0; |
1783 | ||
f538b421 HL |
1784 | ossl_quic_tx_packetiser_set_initial_token(ch->txp, buf, retry_token_len, |
1785 | free_token, NULL); | |
1786 | ||
1787 | ch->retry_scid = *retry_scid; | |
1788 | ch->doing_retry = 1; | |
1789 | ||
1790 | /* | |
1791 | * We need to stimulate the Initial EL to generate the first CRYPTO frame | |
1792 | * again. We can do this most cleanly by simply forcing the ACKM to consider | |
1793 | * the first Initial packet as lost, which it effectively was as the server | |
1794 | * hasn't processed it. This also maintains the desired behaviour with e.g. | |
1795 | * PNs not resetting and so on. | |
1796 | * | |
1797 | * The PN we used initially is always zero, because QUIC does not allow | |
1798 | * repeated retries. | |
1799 | */ | |
1800 | if (!ossl_ackm_mark_packet_pseudo_lost(ch->ackm, QUIC_PN_SPACE_INITIAL, | |
1801 | /*PN=*/0)) | |
1802 | return 0; | |
1803 | ||
1804 | /* | |
1805 | * Plug in new secrets for the Initial EL. This is the only time we change | |
1806 | * the secrets for an EL after we already provisioned it. | |
1807 | */ | |
1808 | if (!ossl_quic_provide_initial_secret(ch->libctx, | |
1809 | ch->propq, | |
1810 | &ch->retry_scid, | |
1811 | /*is_server=*/0, | |
1812 | ch->qrx, ch->qtx)) | |
1813 | return 0; | |
1814 | ||
1815 | return 1; | |
1816 | } | |
1817 | ||
1818 | /* Called when an EL is to be discarded. */ | |
1819 | static int ch_discard_el(QUIC_CHANNEL *ch, | |
1820 | uint32_t enc_level) | |
1821 | { | |
1822 | if (!ossl_assert(enc_level < QUIC_ENC_LEVEL_1RTT)) | |
1823 | return 0; | |
1824 | ||
1825 | if ((ch->el_discarded & (1U << enc_level)) != 0) | |
1826 | /* Already done. */ | |
1827 | return 1; | |
1828 | ||
1829 | /* Best effort for all of these. */ | |
1830 | ossl_quic_tx_packetiser_discard_enc_level(ch->txp, enc_level); | |
1831 | ossl_qrx_discard_enc_level(ch->qrx, enc_level); | |
1832 | ossl_qtx_discard_enc_level(ch->qtx, enc_level); | |
1833 | ||
1834 | if (enc_level != QUIC_ENC_LEVEL_0RTT) { | |
1835 | uint32_t pn_space = ossl_quic_enc_level_to_pn_space(enc_level); | |
1836 | ||
1837 | ossl_ackm_on_pkt_space_discarded(ch->ackm, pn_space); | |
1838 | ||
1839 | /* We should still have crypto streams at this point. */ | |
79534440 HL |
1840 | if (!ossl_assert(ch->crypto_send[pn_space] != NULL) |
1841 | || !ossl_assert(ch->crypto_recv[pn_space] != NULL)) | |
1842 | return 0; | |
f538b421 HL |
1843 | |
1844 | /* Get rid of the crypto stream state for the EL. */ | |
1845 | ossl_quic_sstream_free(ch->crypto_send[pn_space]); | |
1846 | ch->crypto_send[pn_space] = NULL; | |
1847 | ||
1848 | ossl_quic_rstream_free(ch->crypto_recv[pn_space]); | |
1849 | ch->crypto_recv[pn_space] = NULL; | |
1850 | } | |
1851 | ||
1852 | ch->el_discarded |= (1U << enc_level); | |
1853 | return 1; | |
1854 | } | |
1855 | ||
1856 | /* Intended to be called by the RXDP. */ | |
1857 | int ossl_quic_channel_on_handshake_confirmed(QUIC_CHANNEL *ch) | |
1858 | { | |
1859 | if (ch->handshake_confirmed) | |
1860 | return 1; | |
1861 | ||
1862 | if (!ch->handshake_complete) { | |
1863 | /* | |
1864 | * Does not make sense for handshake to be confirmed before it is | |
1865 | * completed. | |
1866 | */ | |
1867 | ossl_quic_channel_raise_protocol_error(ch, QUIC_ERR_PROTOCOL_VIOLATION, | |
1868 | OSSL_QUIC_FRAME_TYPE_HANDSHAKE_DONE, | |
1869 | "handshake cannot be confirmed " | |
1870 | "before it is completed"); | |
1871 | return 0; | |
1872 | } | |
1873 | ||
1874 | ch_discard_el(ch, QUIC_ENC_LEVEL_HANDSHAKE); | |
1875 | ch->handshake_confirmed = 1; | |
1876 | return 1; | |
1877 | } | |
1878 | ||
1879 | /* | |
1880 | * Master function used when we want to start tearing down a connection: | |
1881 | * | |
1882 | * - If the connection is still IDLE we can go straight to TERMINATED; | |
1883 | * | |
1884 | * - If we are already TERMINATED this is a no-op. | |
1885 | * | |
1886 | * - If we are TERMINATING - CLOSING and we have now got a CONNECTION_CLOSE | |
9bbc5b54 | 1887 | * from the peer (tcause->remote == 1), we move to TERMINATING - DRAINING. |
f538b421 HL |
1888 | * |
1889 | * - If we are TERMINATING - DRAINING, we remain here until the terminating | |
1890 | * timer expires. | |
1891 | * | |
1892 | * - Otherwise, we are in ACTIVE and move to TERMINATING - CLOSING. | |
1893 | * if we caused the termination (e.g. we have sent a CONNECTION_CLOSE). Note | |
1894 | * that we are considered to have caused a termination if we sent the first | |
1895 | * CONNECTION_CLOSE frame, even if it is caused by a peer protocol | |
1896 | * violation. If the peer sent the first CONNECTION_CLOSE frame, we move to | |
1897 | * TERMINATING - DRAINING. | |
1898 | * | |
1899 | * We record the termination cause structure passed on the first call only. | |
1900 | * Any successive calls have their termination cause data discarded; | |
1901 | * once we start sending a CONNECTION_CLOSE frame, we don't change the details | |
1902 | * in it. | |
1903 | */ | |
1904 | static void ch_start_terminating(QUIC_CHANNEL *ch, | |
df15e990 HL |
1905 | const QUIC_TERMINATE_CAUSE *tcause, |
1906 | int force_immediate) | |
f538b421 HL |
1907 | { |
1908 | switch (ch->state) { | |
75b2920a HL |
1909 | default: |
1910 | case QUIC_CHANNEL_STATE_IDLE: | |
1911 | ch->terminate_cause = *tcause; | |
1912 | ch_on_terminating_timeout(ch); | |
1913 | break; | |
1914 | ||
1915 | case QUIC_CHANNEL_STATE_ACTIVE: | |
75b2920a | 1916 | ch->terminate_cause = *tcause; |
df15e990 HL |
1917 | |
1918 | if (!force_immediate) { | |
1919 | ch->state = tcause->remote ? QUIC_CHANNEL_STATE_TERMINATING_DRAINING | |
1920 | : QUIC_CHANNEL_STATE_TERMINATING_CLOSING; | |
1921 | ch->terminate_deadline | |
1922 | = ossl_time_add(ossl_time_now(), | |
1923 | ossl_time_multiply(ossl_ackm_get_pto_duration(ch->ackm), | |
1924 | 3)); | |
1925 | ||
1926 | if (!tcause->remote) { | |
1927 | OSSL_QUIC_FRAME_CONN_CLOSE f = {0}; | |
1928 | ||
1929 | /* best effort */ | |
1930 | f.error_code = ch->terminate_cause.error_code; | |
1931 | f.frame_type = ch->terminate_cause.frame_type; | |
1932 | f.is_app = ch->terminate_cause.app; | |
1933 | ossl_quic_tx_packetiser_schedule_conn_close(ch->txp, &f); | |
1934 | ch->conn_close_queued = 1; | |
1935 | } | |
1936 | } else { | |
1937 | ch_on_terminating_timeout(ch); | |
75b2920a HL |
1938 | } |
1939 | break; | |
f538b421 | 1940 | |
75b2920a | 1941 | case QUIC_CHANNEL_STATE_TERMINATING_CLOSING: |
df15e990 HL |
1942 | if (force_immediate) |
1943 | ch_on_terminating_timeout(ch); | |
1944 | else if (tcause->remote) | |
75b2920a | 1945 | ch->state = QUIC_CHANNEL_STATE_TERMINATING_DRAINING; |
f538b421 | 1946 | |
75b2920a | 1947 | break; |
f538b421 | 1948 | |
75b2920a | 1949 | case QUIC_CHANNEL_STATE_TERMINATING_DRAINING: |
df15e990 HL |
1950 | /* |
1951 | * Other than in the force-immediate case, we remain here until the | |
1952 | * timout expires. | |
1953 | */ | |
1954 | if (force_immediate) | |
1955 | ch_on_terminating_timeout(ch); | |
1956 | ||
75b2920a | 1957 | break; |
f538b421 | 1958 | |
75b2920a HL |
1959 | case QUIC_CHANNEL_STATE_TERMINATED: |
1960 | /* No-op. */ | |
1961 | break; | |
f538b421 HL |
1962 | } |
1963 | } | |
1964 | ||
1965 | /* For RXDP use. */ | |
1966 | void ossl_quic_channel_on_remote_conn_close(QUIC_CHANNEL *ch, | |
1967 | OSSL_QUIC_FRAME_CONN_CLOSE *f) | |
1968 | { | |
1969 | QUIC_TERMINATE_CAUSE tcause = {0}; | |
1970 | ||
1971 | if (!ossl_quic_channel_is_active(ch)) | |
1972 | return; | |
1973 | ||
1974 | tcause.remote = 1; | |
1975 | tcause.app = f->is_app; | |
1976 | tcause.error_code = f->error_code; | |
1977 | tcause.frame_type = f->frame_type; | |
1978 | ||
df15e990 HL |
1979 | ch_start_terminating(ch, &tcause, 0); |
1980 | } | |
1981 | ||
1982 | static void ch_raise_net_error(QUIC_CHANNEL *ch) | |
1983 | { | |
1984 | QUIC_TERMINATE_CAUSE tcause = {0}; | |
1985 | ||
1986 | tcause.error_code = QUIC_ERR_INTERNAL_ERROR; | |
1987 | ||
1988 | /* | |
1989 | * Skip Terminating state and go directly to Terminated, no point trying to | |
1990 | * send CONNECTION_CLOSE if we cannot communicate. | |
1991 | */ | |
1992 | ch_start_terminating(ch, &tcause, 1); | |
f538b421 HL |
1993 | } |
1994 | ||
1995 | void ossl_quic_channel_raise_protocol_error(QUIC_CHANNEL *ch, | |
1996 | uint64_t error_code, | |
1997 | uint64_t frame_type, | |
1998 | const char *reason) | |
1999 | { | |
2000 | QUIC_TERMINATE_CAUSE tcause = {0}; | |
2001 | ||
2002 | tcause.error_code = error_code; | |
2003 | tcause.frame_type = frame_type; | |
2004 | ||
df15e990 | 2005 | ch_start_terminating(ch, &tcause, 0); |
f538b421 HL |
2006 | } |
2007 | ||
2008 | /* | |
2009 | * Called once the terminating timer expires, meaning we move from TERMINATING | |
2010 | * to TERMINATED. | |
2011 | */ | |
2012 | static void ch_on_terminating_timeout(QUIC_CHANNEL *ch) | |
2013 | { | |
2014 | ch->state = QUIC_CHANNEL_STATE_TERMINATED; | |
2015 | } | |
2016 | ||
2017 | /* | |
2018 | * Updates our idle deadline. Called when an event happens which should bump the | |
2019 | * idle timeout. | |
2020 | */ | |
2021 | static void ch_update_idle(QUIC_CHANNEL *ch) | |
2022 | { | |
2023 | if (ch->max_idle_timeout == 0) | |
2024 | ch->idle_deadline = ossl_time_infinite(); | |
2025 | else | |
2026 | ch->idle_deadline = ossl_time_add(ossl_time_now(), | |
2027 | ossl_ms2time(ch->max_idle_timeout)); | |
2028 | } | |
2029 | ||
2030 | /* Called when the idle timeout expires. */ | |
2031 | static void ch_on_idle_timeout(QUIC_CHANNEL *ch) | |
2032 | { | |
2033 | /* | |
2034 | * Idle timeout does not have an error code associated with it because a | |
2035 | * CONN_CLOSE is never sent for it. We shouldn't use this data once we reach | |
2036 | * TERMINATED anyway. | |
2037 | */ | |
2038 | ch->terminate_cause.app = 0; | |
2039 | ch->terminate_cause.error_code = UINT64_MAX; | |
2040 | ch->terminate_cause.frame_type = 0; | |
2041 | ||
2042 | ch->state = QUIC_CHANNEL_STATE_TERMINATED; | |
2043 | } | |
b1b06da2 HL |
2044 | |
2045 | /* Called when we, as a server, get a new incoming connection. */ | |
2046 | static int ch_server_on_new_conn(QUIC_CHANNEL *ch, const BIO_ADDR *peer, | |
2047 | const QUIC_CONN_ID *peer_scid, | |
2048 | const QUIC_CONN_ID *peer_dcid) | |
2049 | { | |
2050 | if (!ossl_assert(ch->state == QUIC_CHANNEL_STATE_IDLE && ch->is_server)) | |
2051 | return 0; | |
2052 | ||
2053 | /* Generate a SCID we will use for the connection. */ | |
2054 | if (!gen_rand_conn_id(ch->libctx, INIT_DCID_LEN, | |
2055 | &ch->cur_local_dcid)) | |
2056 | return 0; | |
2057 | ||
2058 | /* Note our newly learnt peer address and CIDs. */ | |
2059 | ch->cur_peer_addr = *peer; | |
2060 | ch->init_dcid = *peer_dcid; | |
2061 | ch->cur_remote_dcid = *peer_scid; | |
2062 | ||
2063 | /* Inform QTX of peer address. */ | |
2064 | if (!ossl_quic_tx_packetiser_set_peer(ch->txp, &ch->cur_peer_addr)) | |
2065 | return 0; | |
2066 | ||
2067 | /* Inform TXP of desired CIDs. */ | |
2068 | if (!ossl_quic_tx_packetiser_set_cur_dcid(ch->txp, &ch->cur_remote_dcid)) | |
2069 | return 0; | |
2070 | ||
2071 | if (!ossl_quic_tx_packetiser_set_cur_scid(ch->txp, &ch->cur_local_dcid)) | |
2072 | return 0; | |
2073 | ||
2074 | /* Plug in secrets for the Initial EL. */ | |
2075 | if (!ossl_quic_provide_initial_secret(ch->libctx, | |
2076 | ch->propq, | |
2077 | &ch->init_dcid, | |
2078 | /*is_server=*/1, | |
2079 | ch->qrx, ch->qtx)) | |
2080 | return 0; | |
2081 | ||
2082 | /* Register our local DCID in the DEMUX. */ | |
2083 | if (!ossl_qrx_add_dst_conn_id(ch->qrx, &ch->cur_local_dcid)) | |
2084 | return 0; | |
2085 | ||
2086 | /* Change state. */ | |
2087 | ch->state = QUIC_CHANNEL_STATE_ACTIVE; | |
2088 | ch->doing_proactive_ver_neg = 0; /* not currently supported */ | |
2089 | return 1; | |
2090 | } | |
d03fe5de MC |
2091 | |
2092 | SSL *ossl_quic_channel_get0_ssl(QUIC_CHANNEL *ch) | |
2093 | { | |
2094 | return ch->tls; | |
2095 | } |