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f538b421 | 1 | /* |
da1c088f | 2 | * Copyright 2022-2023 The OpenSSL Project Authors. All Rights Reserved. |
f538b421 HL |
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 | ||
9c3ea4e1 TM |
10 | #include <openssl/rand.h> |
11 | #include <openssl/err.h> | |
f538b421 HL |
12 | #include "internal/quic_channel.h" |
13 | #include "internal/quic_error.h" | |
14 | #include "internal/quic_rx_depack.h" | |
cce6fccd | 15 | #include "internal/quic_lcidm.h" |
5f86ae32 | 16 | #include "internal/quic_srtm.h" |
f538b421 HL |
17 | #include "../ssl_local.h" |
18 | #include "quic_channel_local.h" | |
34fa182e | 19 | #include "quic_port_local.h" |
22739cc3 | 20 | #include "quic_engine_local.h" |
f538b421 | 21 | |
b1b06da2 HL |
22 | /* |
23 | * NOTE: While this channel implementation currently has basic server support, | |
24 | * this functionality has been implemented for internal testing purposes and is | |
25 | * not suitable for network use. In particular, it does not implement address | |
26 | * validation, anti-amplification or retry logic. | |
27 | * | |
44cb36d0 TM |
28 | * TODO(QUIC SERVER): Implement address validation and anti-amplification |
29 | * TODO(QUIC SERVER): Implement retry logic | |
b1b06da2 HL |
30 | */ |
31 | ||
29f63384 HL |
32 | #define INIT_CRYPTO_RECV_BUF_LEN 16384 |
33 | #define INIT_CRYPTO_SEND_BUF_LEN 16384 | |
34 | #define INIT_APP_BUF_LEN 8192 | |
f538b421 | 35 | |
9cf091a3 HL |
36 | /* |
37 | * Interval before we force a PING to ensure NATs don't timeout. This is based | |
0815b725 | 38 | * on the lowest commonly seen value of 30 seconds as cited in RFC 9000 s. |
9cf091a3 HL |
39 | * 10.1.2. |
40 | */ | |
41 | #define MAX_NAT_INTERVAL (ossl_ms2time(25000)) | |
42 | ||
f13868de HL |
43 | /* |
44 | * Our maximum ACK delay on the TX side. This is up to us to choose. Note that | |
45 | * this could differ from QUIC_DEFAULT_MAX_DELAY in future as that is a protocol | |
46 | * value which determines the value of the maximum ACK delay if the | |
47 | * max_ack_delay transport parameter is not set. | |
48 | */ | |
49 | #define DEFAULT_MAX_ACK_DELAY QUIC_DEFAULT_MAX_ACK_DELAY | |
50 | ||
ce503f5c HL |
51 | DEFINE_LIST_OF_IMPL(ch, QUIC_CHANNEL); |
52 | ||
982dae89 | 53 | static void ch_save_err_state(QUIC_CHANNEL *ch); |
82b7a0ee | 54 | static int ch_rx(QUIC_CHANNEL *ch, int channel_only); |
f538b421 | 55 | static int ch_tx(QUIC_CHANNEL *ch); |
82b7a0ee HL |
56 | static int ch_tick_tls(QUIC_CHANNEL *ch, int channel_only); |
57 | static void ch_rx_handle_packet(QUIC_CHANNEL *ch, int channel_only); | |
f538b421 HL |
58 | static OSSL_TIME ch_determine_next_tick_deadline(QUIC_CHANNEL *ch); |
59 | static int ch_retry(QUIC_CHANNEL *ch, | |
60 | const unsigned char *retry_token, | |
61 | size_t retry_token_len, | |
62 | const QUIC_CONN_ID *retry_scid); | |
63 | static void ch_cleanup(QUIC_CHANNEL *ch); | |
64 | static int ch_generate_transport_params(QUIC_CHANNEL *ch); | |
65 | static int ch_on_transport_params(const unsigned char *params, | |
66 | size_t params_len, | |
67 | void *arg); | |
68 | static int ch_on_handshake_alert(void *arg, unsigned char alert_code); | |
69 | static int ch_on_handshake_complete(void *arg); | |
70 | static int ch_on_handshake_yield_secret(uint32_t enc_level, int direction, | |
71 | uint32_t suite_id, EVP_MD *md, | |
72 | const unsigned char *secret, | |
73 | size_t secret_len, | |
74 | void *arg); | |
7257188b MC |
75 | static int ch_on_crypto_recv_record(const unsigned char **buf, |
76 | size_t *bytes_read, void *arg); | |
77 | static int ch_on_crypto_release_record(size_t bytes_read, void *arg); | |
f538b421 HL |
78 | static int crypto_ensure_empty(QUIC_RSTREAM *rstream); |
79 | static int ch_on_crypto_send(const unsigned char *buf, size_t buf_len, | |
80 | size_t *consumed, void *arg); | |
81 | static OSSL_TIME get_time(void *arg); | |
82 | static uint64_t get_stream_limit(int uni, void *arg); | |
dfe5e7fa | 83 | static int rx_late_validate(QUIC_PN pn, int pn_space, void *arg); |
8a65e7a5 | 84 | static void rxku_detected(QUIC_PN pn, void *arg); |
f538b421 HL |
85 | static int ch_retry(QUIC_CHANNEL *ch, |
86 | const unsigned char *retry_token, | |
87 | size_t retry_token_len, | |
88 | const QUIC_CONN_ID *retry_scid); | |
89 | static void ch_update_idle(QUIC_CHANNEL *ch); | |
90 | static int ch_discard_el(QUIC_CHANNEL *ch, | |
91 | uint32_t enc_level); | |
92 | static void ch_on_idle_timeout(QUIC_CHANNEL *ch); | |
93 | static void ch_update_idle(QUIC_CHANNEL *ch); | |
3b1ab5a3 | 94 | static void ch_update_ping_deadline(QUIC_CHANNEL *ch); |
f538b421 HL |
95 | static void ch_on_terminating_timeout(QUIC_CHANNEL *ch); |
96 | static void ch_start_terminating(QUIC_CHANNEL *ch, | |
df15e990 HL |
97 | const QUIC_TERMINATE_CAUSE *tcause, |
98 | int force_immediate); | |
8a65e7a5 HL |
99 | static void ch_on_txp_ack_tx(const OSSL_QUIC_FRAME_ACK *ack, uint32_t pn_space, |
100 | void *arg); | |
777a8a7f HL |
101 | static void ch_rx_handle_version_neg(QUIC_CHANNEL *ch, OSSL_QRX_PKT *pkt); |
102 | static void ch_raise_version_neg_failure(QUIC_CHANNEL *ch); | |
f538b421 | 103 | |
cdd91631 P |
104 | DEFINE_LHASH_OF_EX(QUIC_SRT_ELEM); |
105 | ||
2031c0e9 HL |
106 | QUIC_NEEDS_LOCK |
107 | static QLOG *ch_get_qlog(QUIC_CHANNEL *ch) | |
108 | { | |
109 | #ifndef OPENSSL_NO_QLOG | |
110 | QLOG_TRACE_INFO qti = {0}; | |
111 | ||
112 | if (ch->qlog != NULL) | |
113 | return ch->qlog; | |
114 | ||
115 | if (!ch->use_qlog) | |
116 | return NULL; | |
117 | ||
118 | qti.odcid = ch->init_dcid; | |
119 | qti.title = NULL; | |
120 | qti.description = NULL; | |
121 | qti.group_id = NULL; | |
122 | qti.is_server = ch->is_server; | |
123 | qti.now_cb = get_time; | |
124 | qti.now_cb_arg = ch; | |
125 | if ((ch->qlog = ossl_qlog_new_from_env(&qti)) == NULL) { | |
126 | ch->use_qlog = 0; /* don't try again */ | |
127 | return NULL; | |
128 | } | |
129 | ||
130 | return ch->qlog; | |
131 | #else | |
132 | return NULL; | |
133 | #endif | |
134 | } | |
135 | ||
f538b421 HL |
136 | /* |
137 | * QUIC Channel Initialization and Teardown | |
138 | * ======================================== | |
139 | */ | |
89b0948e HL |
140 | #define DEFAULT_INIT_CONN_RXFC_WND (768 * 1024) |
141 | #define DEFAULT_CONN_RXFC_MAX_WND_MUL 20 | |
0815b725 | 142 | |
89b0948e HL |
143 | #define DEFAULT_INIT_STREAM_RXFC_WND (512 * 1024) |
144 | #define DEFAULT_STREAM_RXFC_MAX_WND_MUL 12 | |
0815b725 | 145 | |
a6b6ea17 HL |
146 | #define DEFAULT_INIT_CONN_MAX_STREAMS 100 |
147 | ||
f538b421 HL |
148 | static int ch_init(QUIC_CHANNEL *ch) |
149 | { | |
150 | OSSL_QUIC_TX_PACKETISER_ARGS txp_args = {0}; | |
151 | OSSL_QTX_ARGS qtx_args = {0}; | |
152 | OSSL_QRX_ARGS qrx_args = {0}; | |
2723d705 | 153 | QUIC_TLS_ARGS tls_args = {0}; |
f538b421 | 154 | uint32_t pn_space; |
b71046b4 HL |
155 | size_t rx_short_dcid_len; |
156 | size_t tx_init_dcid_len; | |
f538b421 | 157 | |
5f86ae32 | 158 | if (ch->port == NULL || ch->lcidm == NULL || ch->srtm == NULL) |
cdd91631 P |
159 | goto err; |
160 | ||
b71046b4 HL |
161 | rx_short_dcid_len = ossl_quic_port_get_rx_short_dcid_len(ch->port); |
162 | tx_init_dcid_len = ossl_quic_port_get_tx_init_dcid_len(ch->port); | |
163 | ||
b1b06da2 HL |
164 | /* For clients, generate our initial DCID. */ |
165 | if (!ch->is_server | |
22739cc3 | 166 | && !ossl_quic_gen_rand_conn_id(ch->port->engine->libctx, tx_init_dcid_len, |
29fbdfaf | 167 | &ch->init_dcid)) |
f538b421 HL |
168 | goto err; |
169 | ||
170 | /* We plug in a network write BIO to the QTX later when we get one. */ | |
22739cc3 | 171 | qtx_args.libctx = ch->port->engine->libctx; |
f538b421 HL |
172 | qtx_args.mdpl = QUIC_MIN_INITIAL_DGRAM_LEN; |
173 | ch->rx_max_udp_payload_size = qtx_args.mdpl; | |
174 | ||
27195689 MC |
175 | ch->ping_deadline = ossl_time_infinite(); |
176 | ||
f538b421 HL |
177 | ch->qtx = ossl_qtx_new(&qtx_args); |
178 | if (ch->qtx == NULL) | |
179 | goto err; | |
180 | ||
181 | ch->txpim = ossl_quic_txpim_new(); | |
182 | if (ch->txpim == NULL) | |
183 | goto err; | |
184 | ||
185 | ch->cfq = ossl_quic_cfq_new(); | |
186 | if (ch->cfq == NULL) | |
187 | goto err; | |
188 | ||
189 | if (!ossl_quic_txfc_init(&ch->conn_txfc, NULL)) | |
190 | goto err; | |
191 | ||
0815b725 HL |
192 | /* |
193 | * Note: The TP we transmit governs what the peer can transmit and thus | |
194 | * applies to the RXFC. | |
195 | */ | |
196 | ch->tx_init_max_stream_data_bidi_local = DEFAULT_INIT_STREAM_RXFC_WND; | |
197 | ch->tx_init_max_stream_data_bidi_remote = DEFAULT_INIT_STREAM_RXFC_WND; | |
198 | ch->tx_init_max_stream_data_uni = DEFAULT_INIT_STREAM_RXFC_WND; | |
199 | ||
f538b421 | 200 | if (!ossl_quic_rxfc_init(&ch->conn_rxfc, NULL, |
0815b725 | 201 | DEFAULT_INIT_CONN_RXFC_WND, |
e8fe7a21 HL |
202 | DEFAULT_CONN_RXFC_MAX_WND_MUL * |
203 | DEFAULT_INIT_CONN_RXFC_WND, | |
b212d554 | 204 | get_time, ch)) |
f538b421 HL |
205 | goto err; |
206 | ||
098914d0 HL |
207 | for (pn_space = QUIC_PN_SPACE_INITIAL; pn_space < QUIC_PN_SPACE_NUM; ++pn_space) |
208 | if (!ossl_quic_rxfc_init_standalone(&ch->crypto_rxfc[pn_space], | |
29f63384 | 209 | INIT_CRYPTO_RECV_BUF_LEN, |
098914d0 HL |
210 | get_time, ch)) |
211 | goto err; | |
212 | ||
1051b4a0 HL |
213 | if (!ossl_quic_rxfc_init_standalone(&ch->max_streams_bidi_rxfc, |
214 | DEFAULT_INIT_CONN_MAX_STREAMS, | |
215 | get_time, ch)) | |
a6b6ea17 HL |
216 | goto err; |
217 | ||
1051b4a0 HL |
218 | if (!ossl_quic_rxfc_init_standalone(&ch->max_streams_uni_rxfc, |
219 | DEFAULT_INIT_CONN_MAX_STREAMS, | |
220 | get_time, ch)) | |
a6b6ea17 HL |
221 | goto err; |
222 | ||
f538b421 HL |
223 | if (!ossl_statm_init(&ch->statm)) |
224 | goto err; | |
225 | ||
226 | ch->have_statm = 1; | |
f6f45c55 | 227 | ch->cc_method = &ossl_cc_newreno_method; |
66ec5348 | 228 | if ((ch->cc_data = ch->cc_method->new(get_time, ch)) == NULL) |
f538b421 HL |
229 | goto err; |
230 | ||
b212d554 | 231 | if ((ch->ackm = ossl_ackm_new(get_time, ch, &ch->statm, |
f538b421 HL |
232 | ch->cc_method, ch->cc_data)) == NULL) |
233 | goto err; | |
234 | ||
a6b6ea17 HL |
235 | if (!ossl_quic_stream_map_init(&ch->qsm, get_stream_limit, ch, |
236 | &ch->max_streams_bidi_rxfc, | |
5915a900 HL |
237 | &ch->max_streams_uni_rxfc, |
238 | ch->is_server)) | |
f538b421 HL |
239 | goto err; |
240 | ||
241 | ch->have_qsm = 1; | |
242 | ||
4760116f HL |
243 | if (!ch->is_server |
244 | && !ossl_quic_lcidm_generate_initial(ch->lcidm, ch, &txp_args.cur_scid)) | |
245 | goto err; | |
246 | ||
f538b421 | 247 | /* We use a zero-length SCID. */ |
a6b6ea17 HL |
248 | txp_args.cur_dcid = ch->init_dcid; |
249 | txp_args.ack_delay_exponent = 3; | |
250 | txp_args.qtx = ch->qtx; | |
251 | txp_args.txpim = ch->txpim; | |
252 | txp_args.cfq = ch->cfq; | |
253 | txp_args.ackm = ch->ackm; | |
254 | txp_args.qsm = &ch->qsm; | |
255 | txp_args.conn_txfc = &ch->conn_txfc; | |
256 | txp_args.conn_rxfc = &ch->conn_rxfc; | |
257 | txp_args.max_streams_bidi_rxfc = &ch->max_streams_bidi_rxfc; | |
258 | txp_args.max_streams_uni_rxfc = &ch->max_streams_uni_rxfc; | |
259 | txp_args.cc_method = ch->cc_method; | |
260 | txp_args.cc_data = ch->cc_data; | |
261 | txp_args.now = get_time; | |
262 | txp_args.now_arg = ch; | |
45454ccc | 263 | |
f538b421 | 264 | for (pn_space = QUIC_PN_SPACE_INITIAL; pn_space < QUIC_PN_SPACE_NUM; ++pn_space) { |
29f63384 | 265 | ch->crypto_send[pn_space] = ossl_quic_sstream_new(INIT_CRYPTO_SEND_BUF_LEN); |
f538b421 HL |
266 | if (ch->crypto_send[pn_space] == NULL) |
267 | goto err; | |
268 | ||
269 | txp_args.crypto[pn_space] = ch->crypto_send[pn_space]; | |
270 | } | |
271 | ||
272 | ch->txp = ossl_quic_tx_packetiser_new(&txp_args); | |
273 | if (ch->txp == NULL) | |
274 | goto err; | |
275 | ||
8a65e7a5 HL |
276 | ossl_quic_tx_packetiser_set_ack_tx_cb(ch->txp, ch_on_txp_ack_tx, ch); |
277 | ||
22739cc3 | 278 | qrx_args.libctx = ch->port->engine->libctx; |
4ed6b48d HL |
279 | qrx_args.demux = ch->port->demux; |
280 | qrx_args.short_conn_id_len = rx_short_dcid_len; | |
f538b421 HL |
281 | qrx_args.max_deferred = 32; |
282 | ||
283 | if ((ch->qrx = ossl_qrx_new(&qrx_args)) == NULL) | |
284 | goto err; | |
285 | ||
dfe5e7fa HL |
286 | if (!ossl_qrx_set_late_validation_cb(ch->qrx, |
287 | rx_late_validate, | |
288 | ch)) | |
f538b421 HL |
289 | goto err; |
290 | ||
8a65e7a5 HL |
291 | if (!ossl_qrx_set_key_update_cb(ch->qrx, |
292 | rxku_detected, | |
293 | ch)) | |
294 | goto err; | |
295 | ||
f538b421 | 296 | for (pn_space = QUIC_PN_SPACE_INITIAL; pn_space < QUIC_PN_SPACE_NUM; ++pn_space) { |
2113ea58 | 297 | ch->crypto_recv[pn_space] = ossl_quic_rstream_new(NULL, NULL, 0); |
f538b421 HL |
298 | if (ch->crypto_recv[pn_space] == NULL) |
299 | goto err; | |
300 | } | |
301 | ||
2723d705 MC |
302 | /* Plug in the TLS handshake layer. */ |
303 | tls_args.s = ch->tls; | |
304 | tls_args.crypto_send_cb = ch_on_crypto_send; | |
305 | tls_args.crypto_send_cb_arg = ch; | |
7257188b MC |
306 | tls_args.crypto_recv_rcd_cb = ch_on_crypto_recv_record; |
307 | tls_args.crypto_recv_rcd_cb_arg = ch; | |
308 | tls_args.crypto_release_rcd_cb = ch_on_crypto_release_record; | |
309 | tls_args.crypto_release_rcd_cb_arg = ch; | |
2723d705 MC |
310 | tls_args.yield_secret_cb = ch_on_handshake_yield_secret; |
311 | tls_args.yield_secret_cb_arg = ch; | |
312 | tls_args.got_transport_params_cb = ch_on_transport_params; | |
313 | tls_args.got_transport_params_cb_arg= ch; | |
314 | tls_args.handshake_complete_cb = ch_on_handshake_complete; | |
315 | tls_args.handshake_complete_cb_arg = ch; | |
316 | tls_args.alert_cb = ch_on_handshake_alert; | |
317 | tls_args.alert_cb_arg = ch; | |
318 | tls_args.is_server = ch->is_server; | |
319 | ||
320 | if ((ch->qtls = ossl_quic_tls_new(&tls_args)) == NULL) | |
f538b421 HL |
321 | goto err; |
322 | ||
f13868de | 323 | ch->tx_max_ack_delay = DEFAULT_MAX_ACK_DELAY; |
4648eac5 HL |
324 | ch->rx_max_ack_delay = QUIC_DEFAULT_MAX_ACK_DELAY; |
325 | ch->rx_ack_delay_exp = QUIC_DEFAULT_ACK_DELAY_EXP; | |
326 | ch->rx_active_conn_id_limit = QUIC_MIN_ACTIVE_CONN_ID_LIMIT; | |
327 | ch->max_idle_timeout = QUIC_DEFAULT_IDLE_TIMEOUT; | |
328 | ch->tx_enc_level = QUIC_ENC_LEVEL_INITIAL; | |
329 | ch->rx_enc_level = QUIC_ENC_LEVEL_INITIAL; | |
16f3b542 | 330 | ch->txku_threshold_override = UINT64_MAX; |
4648eac5 | 331 | |
f13868de HL |
332 | ossl_ackm_set_tx_max_ack_delay(ch->ackm, ossl_ms2time(ch->tx_max_ack_delay)); |
333 | ossl_ackm_set_rx_max_ack_delay(ch->ackm, ossl_ms2time(ch->rx_max_ack_delay)); | |
334 | ||
f538b421 HL |
335 | /* |
336 | * Determine the QUIC Transport Parameters and serialize the transport | |
337 | * parameters block. (For servers, we do this later as we must defer | |
338 | * generation until we have received the client's transport parameters.) | |
339 | */ | |
340 | if (!ch->is_server && !ch_generate_transport_params(ch)) | |
341 | goto err; | |
342 | ||
f538b421 | 343 | ch_update_idle(ch); |
ce503f5c HL |
344 | ossl_list_ch_insert_tail(&ch->port->channel_list, ch); |
345 | ch->on_port_list = 1; | |
f538b421 HL |
346 | return 1; |
347 | ||
348 | err: | |
349 | ch_cleanup(ch); | |
350 | return 0; | |
351 | } | |
352 | ||
353 | static void ch_cleanup(QUIC_CHANNEL *ch) | |
354 | { | |
355 | uint32_t pn_space; | |
356 | ||
357 | if (ch->ackm != NULL) | |
358 | for (pn_space = QUIC_PN_SPACE_INITIAL; | |
359 | pn_space < QUIC_PN_SPACE_NUM; | |
360 | ++pn_space) | |
361 | ossl_ackm_on_pkt_space_discarded(ch->ackm, pn_space); | |
362 | ||
cce6fccd | 363 | ossl_quic_lcidm_cull(ch->lcidm, ch); |
5f86ae32 | 364 | ossl_quic_srtm_cull(ch->srtm, ch); |
f538b421 HL |
365 | ossl_quic_tx_packetiser_free(ch->txp); |
366 | ossl_quic_txpim_free(ch->txpim); | |
367 | ossl_quic_cfq_free(ch->cfq); | |
368 | ossl_qtx_free(ch->qtx); | |
369 | if (ch->cc_data != NULL) | |
370 | ch->cc_method->free(ch->cc_data); | |
371 | if (ch->have_statm) | |
372 | ossl_statm_destroy(&ch->statm); | |
373 | ossl_ackm_free(ch->ackm); | |
374 | ||
f538b421 HL |
375 | if (ch->have_qsm) |
376 | ossl_quic_stream_map_cleanup(&ch->qsm); | |
377 | ||
378 | for (pn_space = QUIC_PN_SPACE_INITIAL; pn_space < QUIC_PN_SPACE_NUM; ++pn_space) { | |
379 | ossl_quic_sstream_free(ch->crypto_send[pn_space]); | |
380 | ossl_quic_rstream_free(ch->crypto_recv[pn_space]); | |
381 | } | |
382 | ||
383 | ossl_qrx_pkt_release(ch->qrx_pkt); | |
384 | ch->qrx_pkt = NULL; | |
385 | ||
2723d705 | 386 | ossl_quic_tls_free(ch->qtls); |
f538b421 | 387 | ossl_qrx_free(ch->qrx); |
f538b421 | 388 | OPENSSL_free(ch->local_transport_params); |
40c8c756 | 389 | OPENSSL_free((char *)ch->terminate_cause.reason); |
9c3ea4e1 | 390 | OSSL_ERR_STATE_free(ch->err_state); |
8c792b0c | 391 | OPENSSL_free(ch->ack_range_scratch); |
cdd91631 | 392 | |
ce503f5c HL |
393 | if (ch->on_port_list) { |
394 | ossl_list_ch_remove(&ch->port->channel_list, ch); | |
395 | ch->on_port_list = 0; | |
396 | } | |
2031c0e9 HL |
397 | |
398 | #ifndef OPENSSL_NO_QLOG | |
399 | if (ch->qlog != NULL) | |
400 | ossl_qlog_flush(ch->qlog); /* best effort */ | |
401 | ||
402 | ossl_qlog_free(ch->qlog); | |
403 | #endif | |
f538b421 HL |
404 | } |
405 | ||
406 | QUIC_CHANNEL *ossl_quic_channel_new(const QUIC_CHANNEL_ARGS *args) | |
407 | { | |
408 | QUIC_CHANNEL *ch = NULL; | |
409 | ||
410 | if ((ch = OPENSSL_zalloc(sizeof(*ch))) == NULL) | |
411 | return NULL; | |
412 | ||
12ab8afc | 413 | ch->port = args->port; |
5cf99b40 MC |
414 | ch->is_server = args->is_server; |
415 | ch->tls = args->tls; | |
cce6fccd | 416 | ch->lcidm = args->lcidm; |
5f86ae32 | 417 | ch->srtm = args->srtm; |
2031c0e9 HL |
418 | #ifndef OPENSSL_NO_QLOG |
419 | ch->use_qlog = args->use_qlog; | |
420 | #endif | |
f538b421 HL |
421 | |
422 | if (!ch_init(ch)) { | |
423 | OPENSSL_free(ch); | |
424 | return NULL; | |
425 | } | |
426 | ||
427 | return ch; | |
428 | } | |
429 | ||
430 | void ossl_quic_channel_free(QUIC_CHANNEL *ch) | |
431 | { | |
432 | if (ch == NULL) | |
433 | return; | |
434 | ||
435 | ch_cleanup(ch); | |
436 | OPENSSL_free(ch); | |
437 | } | |
438 | ||
14e31409 MC |
439 | /* Set mutator callbacks for test framework support */ |
440 | int ossl_quic_channel_set_mutator(QUIC_CHANNEL *ch, | |
441 | ossl_mutate_packet_cb mutatecb, | |
442 | ossl_finish_mutate_cb finishmutatecb, | |
443 | void *mutatearg) | |
444 | { | |
445 | if (ch->qtx == NULL) | |
446 | return 0; | |
447 | ||
448 | ossl_qtx_set_mutator(ch->qtx, mutatecb, finishmutatecb, mutatearg); | |
449 | return 1; | |
450 | } | |
451 | ||
f538b421 HL |
452 | int ossl_quic_channel_get_peer_addr(QUIC_CHANNEL *ch, BIO_ADDR *peer_addr) |
453 | { | |
617b459d HL |
454 | if (!ch->addressed_mode) |
455 | return 0; | |
456 | ||
f538b421 HL |
457 | *peer_addr = ch->cur_peer_addr; |
458 | return 1; | |
459 | } | |
460 | ||
461 | int ossl_quic_channel_set_peer_addr(QUIC_CHANNEL *ch, const BIO_ADDR *peer_addr) | |
462 | { | |
617b459d HL |
463 | if (ch->state != QUIC_CHANNEL_STATE_IDLE) |
464 | return 0; | |
465 | ||
466 | if (peer_addr == NULL || BIO_ADDR_family(peer_addr) == AF_UNSPEC) { | |
467 | BIO_ADDR_clear(&ch->cur_peer_addr); | |
468 | ch->addressed_mode = 0; | |
469 | return 1; | |
470 | } | |
471 | ||
472 | ch->cur_peer_addr = *peer_addr; | |
473 | ch->addressed_mode = 1; | |
f538b421 HL |
474 | return 1; |
475 | } | |
476 | ||
477 | QUIC_REACTOR *ossl_quic_channel_get_reactor(QUIC_CHANNEL *ch) | |
478 | { | |
632b0c7e | 479 | return ossl_quic_port_get0_reactor(ch->port); |
f538b421 HL |
480 | } |
481 | ||
482 | QUIC_STREAM_MAP *ossl_quic_channel_get_qsm(QUIC_CHANNEL *ch) | |
483 | { | |
484 | return &ch->qsm; | |
485 | } | |
486 | ||
487 | OSSL_STATM *ossl_quic_channel_get_statm(QUIC_CHANNEL *ch) | |
488 | { | |
489 | return &ch->statm; | |
490 | } | |
491 | ||
492 | QUIC_STREAM *ossl_quic_channel_get_stream_by_id(QUIC_CHANNEL *ch, | |
493 | uint64_t stream_id) | |
494 | { | |
495 | return ossl_quic_stream_map_get_by_id(&ch->qsm, stream_id); | |
496 | } | |
497 | ||
498 | int ossl_quic_channel_is_active(const QUIC_CHANNEL *ch) | |
499 | { | |
500 | return ch != NULL && ch->state == QUIC_CHANNEL_STATE_ACTIVE; | |
501 | } | |
502 | ||
7757f5ef | 503 | int ossl_quic_channel_is_closing(const QUIC_CHANNEL *ch) |
f538b421 | 504 | { |
afe4a797 P |
505 | return ch->state == QUIC_CHANNEL_STATE_TERMINATING_CLOSING; |
506 | } | |
c12e1113 | 507 | |
afe4a797 P |
508 | static int ossl_quic_channel_is_draining(const QUIC_CHANNEL *ch) |
509 | { | |
510 | return ch->state == QUIC_CHANNEL_STATE_TERMINATING_DRAINING; | |
f538b421 HL |
511 | } |
512 | ||
afe4a797 | 513 | static int ossl_quic_channel_is_terminating(const QUIC_CHANNEL *ch) |
f538b421 | 514 | { |
afe4a797 P |
515 | return ossl_quic_channel_is_closing(ch) |
516 | || ossl_quic_channel_is_draining(ch); | |
517 | } | |
c12e1113 | 518 | |
afe4a797 P |
519 | int ossl_quic_channel_is_terminated(const QUIC_CHANNEL *ch) |
520 | { | |
521 | return ch->state == QUIC_CHANNEL_STATE_TERMINATED; | |
f538b421 HL |
522 | } |
523 | ||
c12e1113 MC |
524 | int ossl_quic_channel_is_term_any(const QUIC_CHANNEL *ch) |
525 | { | |
526 | return ossl_quic_channel_is_terminating(ch) | |
527 | || ossl_quic_channel_is_terminated(ch); | |
528 | } | |
529 | ||
723cbe8a HL |
530 | const QUIC_TERMINATE_CAUSE * |
531 | ossl_quic_channel_get_terminate_cause(const QUIC_CHANNEL *ch) | |
f538b421 | 532 | { |
723cbe8a | 533 | return ossl_quic_channel_is_term_any(ch) ? &ch->terminate_cause : NULL; |
f538b421 HL |
534 | } |
535 | ||
536 | int ossl_quic_channel_is_handshake_complete(const QUIC_CHANNEL *ch) | |
537 | { | |
538 | return ch->handshake_complete; | |
539 | } | |
540 | ||
ce8f20b6 MC |
541 | int ossl_quic_channel_is_handshake_confirmed(const QUIC_CHANNEL *ch) |
542 | { | |
543 | return ch->handshake_confirmed; | |
544 | } | |
545 | ||
553a4e00 HL |
546 | QUIC_DEMUX *ossl_quic_channel_get0_demux(QUIC_CHANNEL *ch) |
547 | { | |
4ed6b48d | 548 | return ch->port->demux; |
553a4e00 HL |
549 | } |
550 | ||
12ab8afc HL |
551 | QUIC_PORT *ossl_quic_channel_get0_port(QUIC_CHANNEL *ch) |
552 | { | |
553 | return ch->port; | |
554 | } | |
555 | ||
22739cc3 HL |
556 | QUIC_ENGINE *ossl_quic_channel_get0_engine(QUIC_CHANNEL *ch) |
557 | { | |
558 | return ossl_quic_port_get0_engine(ch->port); | |
559 | } | |
560 | ||
fb2245c4 HL |
561 | CRYPTO_MUTEX *ossl_quic_channel_get_mutex(QUIC_CHANNEL *ch) |
562 | { | |
f98bc5c9 | 563 | return ossl_quic_port_get0_mutex(ch->port); |
fb2245c4 HL |
564 | } |
565 | ||
9280d26a HL |
566 | int ossl_quic_channel_has_pending(const QUIC_CHANNEL *ch) |
567 | { | |
4ed6b48d | 568 | return ossl_quic_demux_has_pending(ch->port->demux) |
9280d26a HL |
569 | || ossl_qrx_processed_read_pending(ch->qrx); |
570 | } | |
571 | ||
f538b421 HL |
572 | /* |
573 | * QUIC Channel: Callbacks from Miscellaneous Subsidiary Components | |
574 | * ================================================================ | |
575 | */ | |
576 | ||
577 | /* Used by various components. */ | |
578 | static OSSL_TIME get_time(void *arg) | |
579 | { | |
b212d554 HL |
580 | QUIC_CHANNEL *ch = arg; |
581 | ||
f98bc5c9 | 582 | return ossl_quic_port_get_time(ch->port); |
f538b421 HL |
583 | } |
584 | ||
585 | /* Used by QSM. */ | |
586 | static uint64_t get_stream_limit(int uni, void *arg) | |
587 | { | |
588 | QUIC_CHANNEL *ch = arg; | |
589 | ||
590 | return uni ? ch->max_local_streams_uni : ch->max_local_streams_bidi; | |
591 | } | |
592 | ||
593 | /* | |
594 | * Called by QRX to determine if a packet is potentially invalid before trying | |
595 | * to decrypt it. | |
596 | */ | |
dfe5e7fa | 597 | static int rx_late_validate(QUIC_PN pn, int pn_space, void *arg) |
f538b421 HL |
598 | { |
599 | QUIC_CHANNEL *ch = arg; | |
600 | ||
601 | /* Potential duplicates should not be processed. */ | |
602 | if (!ossl_ackm_is_rx_pn_processable(ch->ackm, pn, pn_space)) | |
603 | return 0; | |
604 | ||
605 | return 1; | |
606 | } | |
607 | ||
8a65e7a5 HL |
608 | /* |
609 | * Triggers a TXKU (whether spontaneous or solicited). Does not check whether | |
610 | * spontaneous TXKU is currently allowed. | |
611 | */ | |
612 | QUIC_NEEDS_LOCK | |
613 | static void ch_trigger_txku(QUIC_CHANNEL *ch) | |
614 | { | |
615 | uint64_t next_pn | |
616 | = ossl_quic_tx_packetiser_get_next_pn(ch->txp, QUIC_PN_SPACE_APP); | |
617 | ||
618 | if (!ossl_quic_pn_valid(next_pn) | |
619 | || !ossl_qtx_trigger_key_update(ch->qtx)) { | |
620 | ossl_quic_channel_raise_protocol_error(ch, QUIC_ERR_INTERNAL_ERROR, 0, | |
621 | "key update"); | |
622 | return; | |
623 | } | |
624 | ||
625 | ch->txku_in_progress = 1; | |
626 | ch->txku_pn = next_pn; | |
627 | ch->rxku_expected = ch->ku_locally_initiated; | |
628 | } | |
629 | ||
630 | QUIC_NEEDS_LOCK | |
631 | static int txku_in_progress(QUIC_CHANNEL *ch) | |
632 | { | |
633 | if (ch->txku_in_progress | |
634 | && ossl_ackm_get_largest_acked(ch->ackm, QUIC_PN_SPACE_APP) >= ch->txku_pn) { | |
635 | OSSL_TIME pto = ossl_ackm_get_pto_duration(ch->ackm); | |
636 | ||
637 | /* | |
638 | * RFC 9001 s. 6.5: Endpoints SHOULD wait three times the PTO before | |
639 | * initiating a key update after receiving an acknowledgment that | |
640 | * confirms that the previous key update was received. | |
641 | * | |
642 | * Note that by the above wording, this period starts from when we get | |
643 | * the ack for a TXKU-triggering packet, not when the TXKU is initiated. | |
644 | * So we defer TXKU cooldown deadline calculation to this point. | |
645 | */ | |
646 | ch->txku_in_progress = 0; | |
647 | ch->txku_cooldown_deadline = ossl_time_add(get_time(ch), | |
648 | ossl_time_multiply(pto, 3)); | |
649 | } | |
650 | ||
651 | return ch->txku_in_progress; | |
652 | } | |
653 | ||
654 | QUIC_NEEDS_LOCK | |
655 | static int txku_allowed(QUIC_CHANNEL *ch) | |
656 | { | |
657 | return ch->tx_enc_level == QUIC_ENC_LEVEL_1RTT /* Sanity check. */ | |
658 | /* Strict RFC 9001 criterion for TXKU. */ | |
659 | && ch->handshake_confirmed | |
660 | && !txku_in_progress(ch); | |
661 | } | |
662 | ||
663 | QUIC_NEEDS_LOCK | |
664 | static int txku_recommendable(QUIC_CHANNEL *ch) | |
665 | { | |
666 | if (!txku_allowed(ch)) | |
667 | return 0; | |
668 | ||
669 | return | |
670 | /* Recommended RFC 9001 criterion for TXKU. */ | |
671 | ossl_time_compare(get_time(ch), ch->txku_cooldown_deadline) >= 0 | |
672 | /* Some additional sensible criteria. */ | |
673 | && !ch->rxku_in_progress | |
674 | && !ch->rxku_pending_confirm; | |
675 | } | |
676 | ||
677 | QUIC_NEEDS_LOCK | |
678 | static int txku_desirable(QUIC_CHANNEL *ch) | |
679 | { | |
16f3b542 | 680 | uint64_t cur_pkt_count, max_pkt_count, thresh_pkt_count; |
8a65e7a5 HL |
681 | const uint32_t enc_level = QUIC_ENC_LEVEL_1RTT; |
682 | ||
683 | /* Check AEAD limit to determine if we should perform a spontaneous TXKU. */ | |
684 | cur_pkt_count = ossl_qtx_get_cur_epoch_pkt_count(ch->qtx, enc_level); | |
685 | max_pkt_count = ossl_qtx_get_max_epoch_pkt_count(ch->qtx, enc_level); | |
686 | ||
16f3b542 HL |
687 | thresh_pkt_count = max_pkt_count / 2; |
688 | if (ch->txku_threshold_override != UINT64_MAX) | |
689 | thresh_pkt_count = ch->txku_threshold_override; | |
690 | ||
691 | return cur_pkt_count >= thresh_pkt_count; | |
8a65e7a5 HL |
692 | } |
693 | ||
694 | QUIC_NEEDS_LOCK | |
695 | static void ch_maybe_trigger_spontaneous_txku(QUIC_CHANNEL *ch) | |
696 | { | |
697 | if (!txku_recommendable(ch) || !txku_desirable(ch)) | |
698 | return; | |
699 | ||
700 | ch->ku_locally_initiated = 1; | |
701 | ch_trigger_txku(ch); | |
702 | } | |
703 | ||
704 | QUIC_NEEDS_LOCK | |
705 | static int rxku_allowed(QUIC_CHANNEL *ch) | |
706 | { | |
707 | /* | |
708 | * RFC 9001 s. 6.1: An endpoint MUST NOT initiate a key update prior to | |
709 | * having confirmed the handshake (Section 4.1.2). | |
710 | * | |
711 | * RFC 9001 s. 6.1: An endpoint MUST NOT initiate a subsequent key update | |
712 | * unless it has received an acknowledgment for a packet that was sent | |
713 | * protected with keys from the current key phase. | |
714 | * | |
715 | * RFC 9001 s. 6.2: If an endpoint detects a second update before it has | |
716 | * sent any packets with updated keys containing an acknowledgment for the | |
717 | * packet that initiated the key update, it indicates that its peer has | |
718 | * updated keys twice without awaiting confirmation. An endpoint MAY treat | |
719 | * such consecutive key updates as a connection error of type | |
720 | * KEY_UPDATE_ERROR. | |
721 | */ | |
722 | return ch->handshake_confirmed && !ch->rxku_pending_confirm; | |
723 | } | |
724 | ||
725 | /* | |
726 | * Called when the QRX detects a new RX key update event. | |
727 | */ | |
728 | enum rxku_decision { | |
729 | DECISION_RXKU_ONLY, | |
730 | DECISION_PROTOCOL_VIOLATION, | |
731 | DECISION_SOLICITED_TXKU | |
732 | }; | |
733 | ||
734 | /* Called when the QRX detects a key update has occurred. */ | |
735 | QUIC_NEEDS_LOCK | |
736 | static void rxku_detected(QUIC_PN pn, void *arg) | |
737 | { | |
738 | QUIC_CHANNEL *ch = arg; | |
739 | enum rxku_decision decision; | |
740 | OSSL_TIME pto; | |
741 | ||
742 | /* | |
743 | * Note: rxku_in_progress is always 0 here as an RXKU cannot be detected | |
744 | * when we are still in UPDATING or COOLDOWN (see quic_record_rx.h). | |
745 | */ | |
746 | assert(!ch->rxku_in_progress); | |
747 | ||
748 | if (!rxku_allowed(ch)) | |
749 | /* Is RXKU even allowed at this time? */ | |
750 | decision = DECISION_PROTOCOL_VIOLATION; | |
751 | ||
752 | else if (ch->ku_locally_initiated) | |
753 | /* | |
754 | * If this key update was locally initiated (meaning that this detected | |
755 | * RXKU event is a result of our own spontaneous TXKU), we do not | |
756 | * trigger another TXKU; after all, to do so would result in an infinite | |
757 | * ping-pong of key updates. We still process it as an RXKU. | |
758 | */ | |
759 | decision = DECISION_RXKU_ONLY; | |
760 | ||
761 | else | |
762 | /* | |
763 | * Otherwise, a peer triggering a KU means we have to trigger a KU also. | |
764 | */ | |
765 | decision = DECISION_SOLICITED_TXKU; | |
766 | ||
767 | if (decision == DECISION_PROTOCOL_VIOLATION) { | |
768 | ossl_quic_channel_raise_protocol_error(ch, QUIC_ERR_KEY_UPDATE_ERROR, | |
769 | 0, "RX key update again too soon"); | |
770 | return; | |
771 | } | |
772 | ||
773 | pto = ossl_ackm_get_pto_duration(ch->ackm); | |
774 | ||
775 | ch->ku_locally_initiated = 0; | |
776 | ch->rxku_in_progress = 1; | |
777 | ch->rxku_pending_confirm = 1; | |
778 | ch->rxku_trigger_pn = pn; | |
779 | ch->rxku_update_end_deadline = ossl_time_add(get_time(ch), pto); | |
c93f7668 | 780 | ch->rxku_expected = 0; |
8a65e7a5 HL |
781 | |
782 | if (decision == DECISION_SOLICITED_TXKU) | |
783 | /* NOT gated by usual txku_allowed() */ | |
784 | ch_trigger_txku(ch); | |
37ba2bc7 HL |
785 | |
786 | /* | |
787 | * Ordinarily, we only generate ACK when some ACK-eliciting frame has been | |
788 | * received. In some cases, this may not occur for a long time, for example | |
789 | * if transmission of application data is going in only one direction and | |
790 | * nothing else is happening with the connection. However, since the peer | |
791 | * cannot initiate a subsequent (spontaneous) TXKU until its prior | |
692a3cab | 792 | * (spontaneous or solicited) TXKU has completed - meaning that prior |
37ba2bc7 HL |
793 | * TXKU's trigger packet (or subsequent packet) has been acknowledged, this |
794 | * can lead to very long times before a TXKU is considered 'completed'. | |
795 | * Optimise this by forcing ACK generation after triggering TXKU. | |
796 | * (Basically, we consider a RXKU event something that is 'ACK-eliciting', | |
797 | * which it more or less should be; it is necessarily separate from ordinary | |
798 | * processing of ACK-eliciting frames as key update is not indicated via a | |
799 | * frame.) | |
800 | */ | |
801 | ossl_quic_tx_packetiser_schedule_ack(ch->txp, QUIC_PN_SPACE_APP); | |
8a65e7a5 HL |
802 | } |
803 | ||
804 | /* Called per tick to handle RXKU timer events. */ | |
805 | QUIC_NEEDS_LOCK | |
806 | static void ch_rxku_tick(QUIC_CHANNEL *ch) | |
807 | { | |
808 | if (!ch->rxku_in_progress | |
809 | || ossl_time_compare(get_time(ch), ch->rxku_update_end_deadline) < 0) | |
810 | return; | |
811 | ||
812 | ch->rxku_update_end_deadline = ossl_time_infinite(); | |
813 | ch->rxku_in_progress = 0; | |
814 | ||
815 | if (!ossl_qrx_key_update_timeout(ch->qrx, /*normal=*/1)) | |
816 | ossl_quic_channel_raise_protocol_error(ch, QUIC_ERR_INTERNAL_ERROR, 0, | |
817 | "RXKU cooldown internal error"); | |
818 | } | |
819 | ||
820 | QUIC_NEEDS_LOCK | |
821 | static void ch_on_txp_ack_tx(const OSSL_QUIC_FRAME_ACK *ack, uint32_t pn_space, | |
822 | void *arg) | |
823 | { | |
824 | QUIC_CHANNEL *ch = arg; | |
825 | ||
826 | if (pn_space != QUIC_PN_SPACE_APP || !ch->rxku_pending_confirm | |
827 | || !ossl_quic_frame_ack_contains_pn(ack, ch->rxku_trigger_pn)) | |
828 | return; | |
829 | ||
830 | /* | |
831 | * Defer clearing rxku_pending_confirm until TXP generate call returns | |
832 | * successfully. | |
833 | */ | |
834 | ch->rxku_pending_confirm_done = 1; | |
835 | } | |
836 | ||
f538b421 HL |
837 | /* |
838 | * QUIC Channel: Handshake Layer Event Handling | |
839 | * ============================================ | |
840 | */ | |
841 | static int ch_on_crypto_send(const unsigned char *buf, size_t buf_len, | |
842 | size_t *consumed, void *arg) | |
843 | { | |
844 | int ret; | |
845 | QUIC_CHANNEL *ch = arg; | |
846 | uint32_t enc_level = ch->tx_enc_level; | |
847 | uint32_t pn_space = ossl_quic_enc_level_to_pn_space(enc_level); | |
848 | QUIC_SSTREAM *sstream = ch->crypto_send[pn_space]; | |
849 | ||
850 | if (!ossl_assert(sstream != NULL)) | |
851 | return 0; | |
852 | ||
853 | ret = ossl_quic_sstream_append(sstream, buf, buf_len, consumed); | |
854 | return ret; | |
855 | } | |
856 | ||
857 | static int crypto_ensure_empty(QUIC_RSTREAM *rstream) | |
858 | { | |
859 | size_t avail = 0; | |
860 | int is_fin = 0; | |
861 | ||
862 | if (rstream == NULL) | |
863 | return 1; | |
864 | ||
865 | if (!ossl_quic_rstream_available(rstream, &avail, &is_fin)) | |
866 | return 0; | |
867 | ||
868 | return avail == 0; | |
869 | } | |
870 | ||
7257188b MC |
871 | static int ch_on_crypto_recv_record(const unsigned char **buf, |
872 | size_t *bytes_read, void *arg) | |
f538b421 HL |
873 | { |
874 | QUIC_CHANNEL *ch = arg; | |
875 | QUIC_RSTREAM *rstream; | |
876 | int is_fin = 0; /* crypto stream is never finished, so we don't use this */ | |
877 | uint32_t i; | |
878 | ||
879 | /* | |
880 | * After we move to a later EL we must not allow our peer to send any new | |
881 | * bytes in the crypto stream on a previous EL. Retransmissions of old bytes | |
882 | * are allowed. | |
883 | * | |
884 | * In practice we will only move to a new EL when we have consumed all bytes | |
885 | * which should be sent on the crypto stream at a previous EL. For example, | |
886 | * the Handshake EL should not be provisioned until we have completely | |
887 | * consumed a TLS 1.3 ServerHello. Thus when we provision an EL the output | |
888 | * of ossl_quic_rstream_available() should be 0 for all lower ELs. Thus if a | |
889 | * given EL is available we simply ensure we have not received any further | |
890 | * bytes at a lower EL. | |
891 | */ | |
45ecfc9b | 892 | for (i = QUIC_ENC_LEVEL_INITIAL; i < ch->rx_enc_level; ++i) |
f538b421 HL |
893 | if (i != QUIC_ENC_LEVEL_0RTT && |
894 | !crypto_ensure_empty(ch->crypto_recv[ossl_quic_enc_level_to_pn_space(i)])) { | |
895 | /* Protocol violation (RFC 9001 s. 4.1.3) */ | |
896 | ossl_quic_channel_raise_protocol_error(ch, QUIC_ERR_PROTOCOL_VIOLATION, | |
897 | OSSL_QUIC_FRAME_TYPE_CRYPTO, | |
898 | "crypto stream data in wrong EL"); | |
899 | return 0; | |
900 | } | |
901 | ||
45ecfc9b | 902 | rstream = ch->crypto_recv[ossl_quic_enc_level_to_pn_space(ch->rx_enc_level)]; |
f538b421 HL |
903 | if (rstream == NULL) |
904 | return 0; | |
905 | ||
7257188b MC |
906 | return ossl_quic_rstream_get_record(rstream, buf, bytes_read, |
907 | &is_fin); | |
908 | } | |
909 | ||
910 | static int ch_on_crypto_release_record(size_t bytes_read, void *arg) | |
911 | { | |
912 | QUIC_CHANNEL *ch = arg; | |
913 | QUIC_RSTREAM *rstream; | |
098914d0 HL |
914 | OSSL_RTT_INFO rtt_info; |
915 | uint32_t rx_pn_space = ossl_quic_enc_level_to_pn_space(ch->rx_enc_level); | |
7257188b | 916 | |
098914d0 | 917 | rstream = ch->crypto_recv[rx_pn_space]; |
7257188b MC |
918 | if (rstream == NULL) |
919 | return 0; | |
920 | ||
098914d0 HL |
921 | ossl_statm_get_rtt_info(ossl_quic_channel_get_statm(ch), &rtt_info); |
922 | if (!ossl_quic_rxfc_on_retire(&ch->crypto_rxfc[rx_pn_space], bytes_read, | |
923 | rtt_info.smoothed_rtt)) | |
924 | return 0; | |
925 | ||
7257188b | 926 | return ossl_quic_rstream_release_record(rstream, bytes_read); |
f538b421 HL |
927 | } |
928 | ||
929 | static int ch_on_handshake_yield_secret(uint32_t enc_level, int direction, | |
930 | uint32_t suite_id, EVP_MD *md, | |
931 | const unsigned char *secret, | |
932 | size_t secret_len, | |
933 | void *arg) | |
934 | { | |
935 | QUIC_CHANNEL *ch = arg; | |
936 | uint32_t i; | |
937 | ||
938 | if (enc_level < QUIC_ENC_LEVEL_HANDSHAKE || enc_level >= QUIC_ENC_LEVEL_NUM) | |
939 | /* Invalid EL. */ | |
940 | return 0; | |
941 | ||
f538b421 HL |
942 | |
943 | if (direction) { | |
944 | /* TX */ | |
45ecfc9b MC |
945 | if (enc_level <= ch->tx_enc_level) |
946 | /* | |
9f0ade7c HL |
947 | * Does not make sense for us to try and provision an EL we have already |
948 | * attained. | |
949 | */ | |
45ecfc9b MC |
950 | return 0; |
951 | ||
f538b421 HL |
952 | if (!ossl_qtx_provide_secret(ch->qtx, enc_level, |
953 | suite_id, md, | |
954 | secret, secret_len)) | |
955 | return 0; | |
956 | ||
957 | ch->tx_enc_level = enc_level; | |
958 | } else { | |
959 | /* RX */ | |
45ecfc9b MC |
960 | if (enc_level <= ch->rx_enc_level) |
961 | /* | |
9f0ade7c HL |
962 | * Does not make sense for us to try and provision an EL we have already |
963 | * attained. | |
964 | */ | |
45ecfc9b MC |
965 | return 0; |
966 | ||
967 | /* | |
9f0ade7c HL |
968 | * Ensure all crypto streams for previous ELs are now empty of available |
969 | * data. | |
970 | */ | |
45ecfc9b | 971 | for (i = QUIC_ENC_LEVEL_INITIAL; i < enc_level; ++i) |
e28f512f | 972 | if (!crypto_ensure_empty(ch->crypto_recv[ossl_quic_enc_level_to_pn_space(i)])) { |
45ecfc9b MC |
973 | /* Protocol violation (RFC 9001 s. 4.1.3) */ |
974 | ossl_quic_channel_raise_protocol_error(ch, QUIC_ERR_PROTOCOL_VIOLATION, | |
975 | OSSL_QUIC_FRAME_TYPE_CRYPTO, | |
976 | "crypto stream data in wrong EL"); | |
977 | return 0; | |
978 | } | |
979 | ||
f538b421 HL |
980 | if (!ossl_qrx_provide_secret(ch->qrx, enc_level, |
981 | suite_id, md, | |
982 | secret, secret_len)) | |
983 | return 0; | |
92282a17 HL |
984 | |
985 | ch->have_new_rx_secret = 1; | |
45ecfc9b | 986 | ch->rx_enc_level = enc_level; |
f538b421 HL |
987 | } |
988 | ||
989 | return 1; | |
990 | } | |
991 | ||
992 | static int ch_on_handshake_complete(void *arg) | |
993 | { | |
994 | QUIC_CHANNEL *ch = arg; | |
995 | ||
e28f512f | 996 | if (!ossl_assert(!ch->handshake_complete)) |
f538b421 HL |
997 | return 0; /* this should not happen twice */ |
998 | ||
999 | if (!ossl_assert(ch->tx_enc_level == QUIC_ENC_LEVEL_1RTT)) | |
1000 | return 0; | |
1001 | ||
62d0da12 | 1002 | if (!ch->got_remote_transport_params) { |
f538b421 HL |
1003 | /* |
1004 | * Was not a valid QUIC handshake if we did not get valid transport | |
1005 | * params. | |
1006 | */ | |
3ad5711e | 1007 | ossl_quic_channel_raise_protocol_error(ch, QUIC_ERR_CRYPTO_MISSING_EXT, |
62d0da12 MC |
1008 | OSSL_QUIC_FRAME_TYPE_CRYPTO, |
1009 | "no transport parameters received"); | |
f538b421 | 1010 | return 0; |
62d0da12 | 1011 | } |
f538b421 HL |
1012 | |
1013 | /* Don't need transport parameters anymore. */ | |
1014 | OPENSSL_free(ch->local_transport_params); | |
1015 | ch->local_transport_params = NULL; | |
1016 | ||
2a6f1f2f HL |
1017 | /* Tell the QRX it can now process 1-RTT packets. */ |
1018 | ossl_qrx_allow_1rtt_processing(ch->qrx); | |
1019 | ||
f538b421 HL |
1020 | /* Tell TXP the handshake is complete. */ |
1021 | ossl_quic_tx_packetiser_notify_handshake_complete(ch->txp); | |
1022 | ||
1023 | ch->handshake_complete = 1; | |
b1b06da2 HL |
1024 | |
1025 | if (ch->is_server) { | |
1026 | /* | |
1027 | * On the server, the handshake is confirmed as soon as it is complete. | |
1028 | */ | |
1029 | ossl_quic_channel_on_handshake_confirmed(ch); | |
1030 | ||
1031 | ossl_quic_tx_packetiser_schedule_handshake_done(ch->txp); | |
1032 | } | |
1033 | ||
f538b421 HL |
1034 | return 1; |
1035 | } | |
1036 | ||
1037 | static int ch_on_handshake_alert(void *arg, unsigned char alert_code) | |
1038 | { | |
1039 | QUIC_CHANNEL *ch = arg; | |
1040 | ||
b644a932 MC |
1041 | /* |
1042 | * RFC 9001 s. 4.4: More specifically, servers MUST NOT send post-handshake | |
1043 | * TLS CertificateRequest messages, and clients MUST treat receipt of such | |
1044 | * messages as a connection error of type PROTOCOL_VIOLATION. | |
1045 | */ | |
04c7fb53 | 1046 | if (alert_code == SSL_AD_UNEXPECTED_MESSAGE |
b644a932 MC |
1047 | && ch->handshake_complete |
1048 | && ossl_quic_tls_is_cert_request(ch->qtls)) | |
1049 | ossl_quic_channel_raise_protocol_error(ch, | |
1050 | QUIC_ERR_PROTOCOL_VIOLATION, | |
1051 | 0, | |
1052 | "Post-handshake TLS " | |
1053 | "CertificateRequest received"); | |
04c7fb53 MC |
1054 | /* |
1055 | * RFC 9001 s. 4.6.1: Servers MUST NOT send the early_data extension with a | |
1056 | * max_early_data_size field set to any value other than 0xffffffff. A | |
1057 | * client MUST treat receipt of a NewSessionTicket that contains an | |
1058 | * early_data extension with any other value as a connection error of type | |
1059 | * PROTOCOL_VIOLATION. | |
1060 | */ | |
1061 | else if (alert_code == SSL_AD_ILLEGAL_PARAMETER | |
1062 | && ch->handshake_complete | |
1063 | && ossl_quic_tls_has_bad_max_early_data(ch->qtls)) | |
1064 | ossl_quic_channel_raise_protocol_error(ch, | |
1065 | QUIC_ERR_PROTOCOL_VIOLATION, | |
1066 | 0, | |
1067 | "Bad max_early_data received"); | |
b644a932 MC |
1068 | else |
1069 | ossl_quic_channel_raise_protocol_error(ch, | |
1070 | QUIC_ERR_CRYPTO_ERR_BEGIN | |
1071 | + alert_code, | |
1072 | 0, "handshake alert"); | |
1073 | ||
f538b421 HL |
1074 | return 1; |
1075 | } | |
1076 | ||
1077 | /* | |
1078 | * QUIC Channel: Transport Parameter Handling | |
1079 | * ========================================== | |
1080 | */ | |
1081 | ||
1082 | /* | |
1083 | * Called by handshake layer when we receive QUIC Transport Parameters from the | |
1084 | * peer. Note that these are not authenticated until the handshake is marked | |
1085 | * as complete. | |
1086 | */ | |
3c567a52 HL |
1087 | #define TP_REASON_SERVER_ONLY(x) \ |
1088 | x " may not be sent by a client" | |
1089 | #define TP_REASON_DUP(x) \ | |
1090 | x " appears multiple times" | |
1091 | #define TP_REASON_MALFORMED(x) \ | |
1092 | x " is malformed" | |
1093 | #define TP_REASON_EXPECTED_VALUE(x) \ | |
1094 | x " does not match expected value" | |
1095 | #define TP_REASON_NOT_RETRY(x) \ | |
1096 | x " sent when not performing a retry" | |
1097 | #define TP_REASON_REQUIRED(x) \ | |
1098 | x " was not sent but is required" | |
cdd91631 P |
1099 | #define TP_REASON_INTERNAL_ERROR(x) \ |
1100 | x " encountered internal error" | |
3c567a52 | 1101 | |
26ad16ea HL |
1102 | static void txfc_bump_cwm_bidi(QUIC_STREAM *s, void *arg) |
1103 | { | |
1104 | if (!ossl_quic_stream_is_bidi(s) | |
1105 | || ossl_quic_stream_is_server_init(s)) | |
1106 | return; | |
1107 | ||
1108 | ossl_quic_txfc_bump_cwm(&s->txfc, *(uint64_t *)arg); | |
1109 | } | |
1110 | ||
1111 | static void txfc_bump_cwm_uni(QUIC_STREAM *s, void *arg) | |
1112 | { | |
1113 | if (ossl_quic_stream_is_bidi(s) | |
1114 | || ossl_quic_stream_is_server_init(s)) | |
1115 | return; | |
1116 | ||
1117 | ossl_quic_txfc_bump_cwm(&s->txfc, *(uint64_t *)arg); | |
1118 | } | |
1119 | ||
1120 | static void do_update(QUIC_STREAM *s, void *arg) | |
1121 | { | |
1122 | QUIC_CHANNEL *ch = arg; | |
1123 | ||
1124 | ossl_quic_stream_map_update_state(&ch->qsm, s); | |
1125 | } | |
1126 | ||
f538b421 HL |
1127 | static int ch_on_transport_params(const unsigned char *params, |
1128 | size_t params_len, | |
1129 | void *arg) | |
1130 | { | |
1131 | QUIC_CHANNEL *ch = arg; | |
1132 | PACKET pkt; | |
1133 | uint64_t id, v; | |
1134 | size_t len; | |
1135 | const unsigned char *body; | |
1136 | int got_orig_dcid = 0; | |
1137 | int got_initial_scid = 0; | |
1138 | int got_retry_scid = 0; | |
1139 | int got_initial_max_data = 0; | |
1140 | int got_initial_max_stream_data_bidi_local = 0; | |
1141 | int got_initial_max_stream_data_bidi_remote = 0; | |
1142 | int got_initial_max_stream_data_uni = 0; | |
1143 | int got_initial_max_streams_bidi = 0; | |
1144 | int got_initial_max_streams_uni = 0; | |
70e809b0 HL |
1145 | int got_stateless_reset_token = 0; |
1146 | int got_preferred_addr = 0; | |
f538b421 HL |
1147 | int got_ack_delay_exp = 0; |
1148 | int got_max_ack_delay = 0; | |
1149 | int got_max_udp_payload_size = 0; | |
1150 | int got_max_idle_timeout = 0; | |
1151 | int got_active_conn_id_limit = 0; | |
0911cb4a | 1152 | int got_disable_active_migration = 0; |
f538b421 | 1153 | QUIC_CONN_ID cid; |
3c567a52 | 1154 | const char *reason = "bad transport parameter"; |
f538b421 | 1155 | |
f94cacb7 HL |
1156 | if (ch->got_remote_transport_params) { |
1157 | reason = "multiple transport parameter extensions"; | |
f538b421 | 1158 | goto malformed; |
f94cacb7 | 1159 | } |
f538b421 | 1160 | |
96014840 TM |
1161 | if (!PACKET_buf_init(&pkt, params, params_len)) { |
1162 | ossl_quic_channel_raise_protocol_error(ch, QUIC_ERR_INTERNAL_ERROR, 0, | |
1163 | "internal error (packet buf init)"); | |
f538b421 | 1164 | return 0; |
96014840 | 1165 | } |
f538b421 HL |
1166 | |
1167 | while (PACKET_remaining(&pkt) > 0) { | |
1168 | if (!ossl_quic_wire_peek_transport_param(&pkt, &id)) | |
1169 | goto malformed; | |
1170 | ||
1171 | switch (id) { | |
75b2920a | 1172 | case QUIC_TPARAM_ORIG_DCID: |
3c567a52 HL |
1173 | if (got_orig_dcid) { |
1174 | reason = TP_REASON_DUP("ORIG_DCID"); | |
1175 | goto malformed; | |
1176 | } | |
1177 | ||
1178 | if (ch->is_server) { | |
1179 | reason = TP_REASON_SERVER_ONLY("ORIG_DCID"); | |
75b2920a | 1180 | goto malformed; |
3c567a52 | 1181 | } |
75b2920a | 1182 | |
3c567a52 HL |
1183 | if (!ossl_quic_wire_decode_transport_param_cid(&pkt, NULL, &cid)) { |
1184 | reason = TP_REASON_MALFORMED("ORIG_DCID"); | |
75b2920a | 1185 | goto malformed; |
3c567a52 | 1186 | } |
75b2920a | 1187 | |
b62ac1ab | 1188 | #ifndef FUZZING_BUILD_MODE_UNSAFE_FOR_PRODUCTION |
75b2920a | 1189 | /* Must match our initial DCID. */ |
3c567a52 HL |
1190 | if (!ossl_quic_conn_id_eq(&ch->init_dcid, &cid)) { |
1191 | reason = TP_REASON_EXPECTED_VALUE("ORIG_DCID"); | |
75b2920a | 1192 | goto malformed; |
3c567a52 | 1193 | } |
b62ac1ab | 1194 | #endif |
75b2920a HL |
1195 | |
1196 | got_orig_dcid = 1; | |
1197 | break; | |
1198 | ||
1199 | case QUIC_TPARAM_RETRY_SCID: | |
3c567a52 HL |
1200 | if (ch->is_server) { |
1201 | reason = TP_REASON_SERVER_ONLY("RETRY_SCID"); | |
1202 | goto malformed; | |
1203 | } | |
1204 | ||
1205 | if (got_retry_scid) { | |
1206 | reason = TP_REASON_DUP("RETRY_SCID"); | |
75b2920a | 1207 | goto malformed; |
3c567a52 HL |
1208 | } |
1209 | ||
1210 | if (!ch->doing_retry) { | |
1211 | reason = TP_REASON_NOT_RETRY("RETRY_SCID"); | |
1212 | goto malformed; | |
1213 | } | |
75b2920a | 1214 | |
3c567a52 HL |
1215 | if (!ossl_quic_wire_decode_transport_param_cid(&pkt, NULL, &cid)) { |
1216 | reason = TP_REASON_MALFORMED("RETRY_SCID"); | |
75b2920a | 1217 | goto malformed; |
3c567a52 | 1218 | } |
75b2920a HL |
1219 | |
1220 | /* Must match Retry packet SCID. */ | |
3c567a52 HL |
1221 | if (!ossl_quic_conn_id_eq(&ch->retry_scid, &cid)) { |
1222 | reason = TP_REASON_EXPECTED_VALUE("RETRY_SCID"); | |
75b2920a | 1223 | goto malformed; |
3c567a52 | 1224 | } |
75b2920a HL |
1225 | |
1226 | got_retry_scid = 1; | |
1227 | break; | |
1228 | ||
1229 | case QUIC_TPARAM_INITIAL_SCID: | |
3c567a52 | 1230 | if (got_initial_scid) { |
75b2920a | 1231 | /* must not appear more than once */ |
3c567a52 | 1232 | reason = TP_REASON_DUP("INITIAL_SCID"); |
75b2920a | 1233 | goto malformed; |
3c567a52 | 1234 | } |
75b2920a | 1235 | |
3c567a52 HL |
1236 | if (!ossl_quic_wire_decode_transport_param_cid(&pkt, NULL, &cid)) { |
1237 | reason = TP_REASON_MALFORMED("INITIAL_SCID"); | |
75b2920a | 1238 | goto malformed; |
3c567a52 | 1239 | } |
75b2920a HL |
1240 | |
1241 | /* Must match SCID of first Initial packet from server. */ | |
3c567a52 HL |
1242 | if (!ossl_quic_conn_id_eq(&ch->init_scid, &cid)) { |
1243 | reason = TP_REASON_EXPECTED_VALUE("INITIAL_SCID"); | |
75b2920a | 1244 | goto malformed; |
3c567a52 | 1245 | } |
75b2920a HL |
1246 | |
1247 | got_initial_scid = 1; | |
1248 | break; | |
1249 | ||
1250 | case QUIC_TPARAM_INITIAL_MAX_DATA: | |
3c567a52 | 1251 | if (got_initial_max_data) { |
75b2920a | 1252 | /* must not appear more than once */ |
3c567a52 | 1253 | reason = TP_REASON_DUP("INITIAL_MAX_DATA"); |
75b2920a | 1254 | goto malformed; |
3c567a52 | 1255 | } |
75b2920a | 1256 | |
3c567a52 HL |
1257 | if (!ossl_quic_wire_decode_transport_param_int(&pkt, &id, &v)) { |
1258 | reason = TP_REASON_MALFORMED("INITIAL_MAX_DATA"); | |
75b2920a | 1259 | goto malformed; |
3c567a52 | 1260 | } |
75b2920a HL |
1261 | |
1262 | ossl_quic_txfc_bump_cwm(&ch->conn_txfc, v); | |
1263 | got_initial_max_data = 1; | |
1264 | break; | |
1265 | ||
1266 | case QUIC_TPARAM_INITIAL_MAX_STREAM_DATA_BIDI_LOCAL: | |
3c567a52 | 1267 | if (got_initial_max_stream_data_bidi_local) { |
75b2920a | 1268 | /* must not appear more than once */ |
3c567a52 | 1269 | reason = TP_REASON_DUP("INITIAL_MAX_STREAM_DATA_BIDI_LOCAL"); |
75b2920a | 1270 | goto malformed; |
3c567a52 | 1271 | } |
75b2920a | 1272 | |
3c567a52 HL |
1273 | if (!ossl_quic_wire_decode_transport_param_int(&pkt, &id, &v)) { |
1274 | reason = TP_REASON_MALFORMED("INITIAL_MAX_STREAM_DATA_BIDI_LOCAL"); | |
75b2920a | 1275 | goto malformed; |
3c567a52 | 1276 | } |
f538b421 HL |
1277 | |
1278 | /* | |
75b2920a HL |
1279 | * This is correct; the BIDI_LOCAL TP governs streams created by |
1280 | * the endpoint which sends the TP, i.e., our peer. | |
f538b421 | 1281 | */ |
54562e89 | 1282 | ch->rx_init_max_stream_data_bidi_remote = v; |
75b2920a HL |
1283 | got_initial_max_stream_data_bidi_local = 1; |
1284 | break; | |
1285 | ||
1286 | case QUIC_TPARAM_INITIAL_MAX_STREAM_DATA_BIDI_REMOTE: | |
3c567a52 | 1287 | if (got_initial_max_stream_data_bidi_remote) { |
75b2920a | 1288 | /* must not appear more than once */ |
3c567a52 | 1289 | reason = TP_REASON_DUP("INITIAL_MAX_STREAM_DATA_BIDI_REMOTE"); |
75b2920a | 1290 | goto malformed; |
3c567a52 | 1291 | } |
75b2920a | 1292 | |
3c567a52 HL |
1293 | if (!ossl_quic_wire_decode_transport_param_int(&pkt, &id, &v)) { |
1294 | reason = TP_REASON_MALFORMED("INITIAL_MAX_STREAM_DATA_BIDI_REMOTE"); | |
75b2920a | 1295 | goto malformed; |
3c567a52 | 1296 | } |
75b2920a HL |
1297 | |
1298 | /* | |
1299 | * This is correct; the BIDI_REMOTE TP governs streams created | |
1300 | * by the endpoint which receives the TP, i.e., us. | |
1301 | */ | |
54562e89 | 1302 | ch->rx_init_max_stream_data_bidi_local = v; |
75b2920a | 1303 | |
26ad16ea HL |
1304 | /* Apply to all existing streams. */ |
1305 | ossl_quic_stream_map_visit(&ch->qsm, txfc_bump_cwm_bidi, &v); | |
75b2920a HL |
1306 | got_initial_max_stream_data_bidi_remote = 1; |
1307 | break; | |
1308 | ||
1309 | case QUIC_TPARAM_INITIAL_MAX_STREAM_DATA_UNI: | |
3c567a52 | 1310 | if (got_initial_max_stream_data_uni) { |
75b2920a | 1311 | /* must not appear more than once */ |
3c567a52 | 1312 | reason = TP_REASON_DUP("INITIAL_MAX_STREAM_DATA_UNI"); |
75b2920a | 1313 | goto malformed; |
3c567a52 | 1314 | } |
75b2920a | 1315 | |
3c567a52 HL |
1316 | if (!ossl_quic_wire_decode_transport_param_int(&pkt, &id, &v)) { |
1317 | reason = TP_REASON_MALFORMED("INITIAL_MAX_STREAM_DATA_UNI"); | |
75b2920a | 1318 | goto malformed; |
3c567a52 | 1319 | } |
75b2920a | 1320 | |
e8fe7a21 | 1321 | ch->rx_init_max_stream_data_uni = v; |
26ad16ea HL |
1322 | |
1323 | /* Apply to all existing streams. */ | |
1324 | ossl_quic_stream_map_visit(&ch->qsm, txfc_bump_cwm_uni, &v); | |
75b2920a HL |
1325 | got_initial_max_stream_data_uni = 1; |
1326 | break; | |
1327 | ||
1328 | case QUIC_TPARAM_ACK_DELAY_EXP: | |
3c567a52 | 1329 | if (got_ack_delay_exp) { |
75b2920a | 1330 | /* must not appear more than once */ |
3c567a52 | 1331 | reason = TP_REASON_DUP("ACK_DELAY_EXP"); |
75b2920a | 1332 | goto malformed; |
3c567a52 | 1333 | } |
75b2920a HL |
1334 | |
1335 | if (!ossl_quic_wire_decode_transport_param_int(&pkt, &id, &v) | |
3c567a52 HL |
1336 | || v > QUIC_MAX_ACK_DELAY_EXP) { |
1337 | reason = TP_REASON_MALFORMED("ACK_DELAY_EXP"); | |
75b2920a | 1338 | goto malformed; |
3c567a52 | 1339 | } |
75b2920a HL |
1340 | |
1341 | ch->rx_ack_delay_exp = (unsigned char)v; | |
1342 | got_ack_delay_exp = 1; | |
1343 | break; | |
1344 | ||
1345 | case QUIC_TPARAM_MAX_ACK_DELAY: | |
3c567a52 | 1346 | if (got_max_ack_delay) { |
75b2920a | 1347 | /* must not appear more than once */ |
3c567a52 | 1348 | reason = TP_REASON_DUP("MAX_ACK_DELAY"); |
96014840 | 1349 | goto malformed; |
3c567a52 | 1350 | } |
75b2920a HL |
1351 | |
1352 | if (!ossl_quic_wire_decode_transport_param_int(&pkt, &id, &v) | |
3c567a52 HL |
1353 | || v >= (((uint64_t)1) << 14)) { |
1354 | reason = TP_REASON_MALFORMED("MAX_ACK_DELAY"); | |
75b2920a | 1355 | goto malformed; |
3c567a52 | 1356 | } |
75b2920a HL |
1357 | |
1358 | ch->rx_max_ack_delay = v; | |
f13868de HL |
1359 | ossl_ackm_set_rx_max_ack_delay(ch->ackm, |
1360 | ossl_ms2time(ch->rx_max_ack_delay)); | |
1361 | ||
75b2920a HL |
1362 | got_max_ack_delay = 1; |
1363 | break; | |
1364 | ||
1365 | case QUIC_TPARAM_INITIAL_MAX_STREAMS_BIDI: | |
3c567a52 | 1366 | if (got_initial_max_streams_bidi) { |
75b2920a | 1367 | /* must not appear more than once */ |
3c567a52 | 1368 | reason = TP_REASON_DUP("INITIAL_MAX_STREAMS_BIDI"); |
96014840 | 1369 | goto malformed; |
3c567a52 | 1370 | } |
75b2920a HL |
1371 | |
1372 | if (!ossl_quic_wire_decode_transport_param_int(&pkt, &id, &v) | |
3c567a52 HL |
1373 | || v > (((uint64_t)1) << 60)) { |
1374 | reason = TP_REASON_MALFORMED("INITIAL_MAX_STREAMS_BIDI"); | |
75b2920a | 1375 | goto malformed; |
3c567a52 | 1376 | } |
75b2920a HL |
1377 | |
1378 | assert(ch->max_local_streams_bidi == 0); | |
1379 | ch->max_local_streams_bidi = v; | |
1380 | got_initial_max_streams_bidi = 1; | |
1381 | break; | |
1382 | ||
1383 | case QUIC_TPARAM_INITIAL_MAX_STREAMS_UNI: | |
3c567a52 | 1384 | if (got_initial_max_streams_uni) { |
75b2920a | 1385 | /* must not appear more than once */ |
3c567a52 | 1386 | reason = TP_REASON_DUP("INITIAL_MAX_STREAMS_UNI"); |
75b2920a | 1387 | goto malformed; |
3c567a52 | 1388 | } |
75b2920a HL |
1389 | |
1390 | if (!ossl_quic_wire_decode_transport_param_int(&pkt, &id, &v) | |
3c567a52 HL |
1391 | || v > (((uint64_t)1) << 60)) { |
1392 | reason = TP_REASON_MALFORMED("INITIAL_MAX_STREAMS_UNI"); | |
75b2920a | 1393 | goto malformed; |
3c567a52 | 1394 | } |
75b2920a HL |
1395 | |
1396 | assert(ch->max_local_streams_uni == 0); | |
1397 | ch->max_local_streams_uni = v; | |
1398 | got_initial_max_streams_uni = 1; | |
1399 | break; | |
1400 | ||
1401 | case QUIC_TPARAM_MAX_IDLE_TIMEOUT: | |
3c567a52 | 1402 | if (got_max_idle_timeout) { |
75b2920a | 1403 | /* must not appear more than once */ |
3c567a52 | 1404 | reason = TP_REASON_DUP("MAX_IDLE_TIMEOUT"); |
75b2920a | 1405 | goto malformed; |
3c567a52 | 1406 | } |
75b2920a | 1407 | |
3c567a52 HL |
1408 | if (!ossl_quic_wire_decode_transport_param_int(&pkt, &id, &v)) { |
1409 | reason = TP_REASON_MALFORMED("MAX_IDLE_TIMEOUT"); | |
75b2920a | 1410 | goto malformed; |
3c567a52 | 1411 | } |
75b2920a | 1412 | |
4648eac5 | 1413 | if (v > 0 && v < ch->max_idle_timeout) |
75b2920a HL |
1414 | ch->max_idle_timeout = v; |
1415 | ||
1416 | ch_update_idle(ch); | |
1417 | got_max_idle_timeout = 1; | |
1418 | break; | |
f538b421 | 1419 | |
75b2920a | 1420 | case QUIC_TPARAM_MAX_UDP_PAYLOAD_SIZE: |
3c567a52 | 1421 | if (got_max_udp_payload_size) { |
75b2920a | 1422 | /* must not appear more than once */ |
3c567a52 | 1423 | reason = TP_REASON_DUP("MAX_UDP_PAYLOAD_SIZE"); |
75b2920a | 1424 | goto malformed; |
3c567a52 | 1425 | } |
f538b421 | 1426 | |
75b2920a | 1427 | if (!ossl_quic_wire_decode_transport_param_int(&pkt, &id, &v) |
3c567a52 HL |
1428 | || v < QUIC_MIN_INITIAL_DGRAM_LEN) { |
1429 | reason = TP_REASON_MALFORMED("MAX_UDP_PAYLOAD_SIZE"); | |
75b2920a | 1430 | goto malformed; |
3c567a52 | 1431 | } |
75b2920a HL |
1432 | |
1433 | ch->rx_max_udp_payload_size = v; | |
1434 | got_max_udp_payload_size = 1; | |
1435 | break; | |
1436 | ||
1437 | case QUIC_TPARAM_ACTIVE_CONN_ID_LIMIT: | |
3c567a52 | 1438 | if (got_active_conn_id_limit) { |
75b2920a | 1439 | /* must not appear more than once */ |
3c567a52 | 1440 | reason = TP_REASON_DUP("ACTIVE_CONN_ID_LIMIT"); |
75b2920a | 1441 | goto malformed; |
3c567a52 | 1442 | } |
75b2920a HL |
1443 | |
1444 | if (!ossl_quic_wire_decode_transport_param_int(&pkt, &id, &v) | |
3c567a52 HL |
1445 | || v < QUIC_MIN_ACTIVE_CONN_ID_LIMIT) { |
1446 | reason = TP_REASON_MALFORMED("ACTIVE_CONN_ID_LIMIT"); | |
75b2920a | 1447 | goto malformed; |
3c567a52 | 1448 | } |
75b2920a HL |
1449 | |
1450 | ch->rx_active_conn_id_limit = v; | |
1451 | got_active_conn_id_limit = 1; | |
1452 | break; | |
1453 | ||
3c567a52 | 1454 | case QUIC_TPARAM_STATELESS_RESET_TOKEN: |
70e809b0 HL |
1455 | if (got_stateless_reset_token) { |
1456 | reason = TP_REASON_DUP("STATELESS_RESET_TOKEN"); | |
1457 | goto malformed; | |
1458 | } | |
1459 | ||
3c567a52 | 1460 | /* |
cdd91631 P |
1461 | * We must ensure a client doesn't send them because we don't have |
1462 | * processing for them. | |
1463 | * | |
1464 | * TODO(QUIC SERVER): remove this restriction | |
3c567a52 HL |
1465 | */ |
1466 | if (ch->is_server) { | |
1467 | reason = TP_REASON_SERVER_ONLY("STATELESS_RESET_TOKEN"); | |
1468 | goto malformed; | |
1469 | } | |
1470 | ||
1471 | body = ossl_quic_wire_decode_transport_param_bytes(&pkt, &id, &len); | |
1472 | if (body == NULL || len != QUIC_STATELESS_RESET_TOKEN_LEN) { | |
1473 | reason = TP_REASON_MALFORMED("STATELESS_RESET_TOKEN"); | |
1474 | goto malformed; | |
1475 | } | |
5f86ae32 HL |
1476 | if (!ossl_quic_srtm_add(ch->srtm, ch, ch->cur_remote_seq_num, |
1477 | (const QUIC_STATELESS_RESET_TOKEN *)body)) { | |
cdd91631 P |
1478 | reason = TP_REASON_INTERNAL_ERROR("STATELESS_RESET_TOKEN"); |
1479 | goto malformed; | |
1480 | } | |
3c567a52 | 1481 | |
70e809b0 | 1482 | got_stateless_reset_token = 1; |
3c567a52 HL |
1483 | break; |
1484 | ||
1485 | case QUIC_TPARAM_PREFERRED_ADDR: | |
54bd1f24 | 1486 | { |
44cb36d0 | 1487 | /* TODO(QUIC FUTURE): Handle preferred address. */ |
54bd1f24 | 1488 | QUIC_PREFERRED_ADDR pfa; |
70e809b0 HL |
1489 | if (got_preferred_addr) { |
1490 | reason = TP_REASON_DUP("PREFERRED_ADDR"); | |
1491 | goto malformed; | |
1492 | } | |
54bd1f24 HL |
1493 | |
1494 | /* | |
1495 | * RFC 9000 s. 18.2: "A server that chooses a zero-length | |
1496 | * connection ID MUST NOT provide a preferred address. | |
1497 | * Similarly, a server MUST NOT include a zero-length connection | |
1498 | * ID in this transport parameter. A client MUST treat a | |
1499 | * violation of these requirements as a connection error of type | |
1500 | * TRANSPORT_PARAMETER_ERROR." | |
1501 | */ | |
1502 | if (ch->is_server) { | |
1503 | reason = TP_REASON_SERVER_ONLY("PREFERRED_ADDR"); | |
1504 | goto malformed; | |
1505 | } | |
1506 | ||
1507 | if (ch->cur_remote_dcid.id_len == 0) { | |
1508 | reason = "PREFERRED_ADDR provided for zero-length CID"; | |
1509 | goto malformed; | |
1510 | } | |
1511 | ||
1512 | if (!ossl_quic_wire_decode_transport_param_preferred_addr(&pkt, &pfa)) { | |
1513 | reason = TP_REASON_MALFORMED("PREFERRED_ADDR"); | |
1514 | goto malformed; | |
1515 | } | |
1516 | ||
1517 | if (pfa.cid.id_len == 0) { | |
1518 | reason = "zero-length CID in PREFERRED_ADDR"; | |
1519 | goto malformed; | |
1520 | } | |
70e809b0 HL |
1521 | |
1522 | got_preferred_addr = 1; | |
3c567a52 | 1523 | } |
3c567a52 | 1524 | break; |
75b2920a HL |
1525 | |
1526 | case QUIC_TPARAM_DISABLE_ACTIVE_MIGRATION: | |
1527 | /* We do not currently handle migration, so nothing to do. */ | |
0911cb4a HL |
1528 | if (got_disable_active_migration) { |
1529 | /* must not appear more than once */ | |
1530 | reason = TP_REASON_DUP("DISABLE_ACTIVE_MIGRATION"); | |
1531 | goto malformed; | |
1532 | } | |
1533 | ||
1534 | body = ossl_quic_wire_decode_transport_param_bytes(&pkt, &id, &len); | |
1535 | if (body == NULL || len > 0) { | |
1536 | reason = TP_REASON_MALFORMED("DISABLE_ACTIVE_MIGRATION"); | |
1537 | goto malformed; | |
1538 | } | |
1539 | ||
1540 | got_disable_active_migration = 1; | |
1541 | break; | |
1542 | ||
75b2920a | 1543 | default: |
0911cb4a HL |
1544 | /* |
1545 | * Skip over and ignore. | |
1546 | * | |
1547 | * RFC 9000 s. 7.4: We SHOULD treat duplicated transport parameters | |
1548 | * as a connection error, but we are not required to. Currently, | |
1549 | * handle this programmatically by checking for duplicates in the | |
1550 | * parameters that we recognise, as above, but don't bother | |
1551 | * maintaining a list of duplicates for anything we don't recognise. | |
1552 | */ | |
75b2920a HL |
1553 | body = ossl_quic_wire_decode_transport_param_bytes(&pkt, &id, |
1554 | &len); | |
1555 | if (body == NULL) | |
1556 | goto malformed; | |
1557 | ||
1558 | break; | |
f538b421 HL |
1559 | } |
1560 | } | |
1561 | ||
3c567a52 HL |
1562 | if (!got_initial_scid) { |
1563 | reason = TP_REASON_REQUIRED("INITIAL_SCID"); | |
f538b421 | 1564 | goto malformed; |
3c567a52 HL |
1565 | } |
1566 | ||
1567 | if (!ch->is_server) { | |
1568 | if (!got_orig_dcid) { | |
1569 | reason = TP_REASON_REQUIRED("ORIG_DCID"); | |
1570 | goto malformed; | |
1571 | } | |
1572 | ||
1573 | if (ch->doing_retry && !got_retry_scid) { | |
1574 | reason = TP_REASON_REQUIRED("RETRY_SCID"); | |
1575 | goto malformed; | |
1576 | } | |
1577 | } | |
f538b421 HL |
1578 | |
1579 | ch->got_remote_transport_params = 1; | |
1580 | ||
1581 | if (got_initial_max_data || got_initial_max_stream_data_bidi_remote | |
1582 | || got_initial_max_streams_bidi || got_initial_max_streams_uni) | |
26ad16ea HL |
1583 | /* |
1584 | * If FC credit was bumped, we may now be able to send. Update all | |
1585 | * streams. | |
1586 | */ | |
1587 | ossl_quic_stream_map_visit(&ch->qsm, do_update, ch); | |
f538b421 HL |
1588 | |
1589 | /* If we are a server, we now generate our own transport parameters. */ | |
1590 | if (ch->is_server && !ch_generate_transport_params(ch)) { | |
1591 | ossl_quic_channel_raise_protocol_error(ch, QUIC_ERR_INTERNAL_ERROR, 0, | |
1592 | "internal error"); | |
1593 | return 0; | |
1594 | } | |
1595 | ||
1596 | return 1; | |
1597 | ||
1598 | malformed: | |
1599 | ossl_quic_channel_raise_protocol_error(ch, QUIC_ERR_TRANSPORT_PARAMETER_ERROR, | |
3c567a52 | 1600 | 0, reason); |
f538b421 HL |
1601 | return 0; |
1602 | } | |
1603 | ||
1604 | /* | |
1605 | * Called when we want to generate transport parameters. This is called | |
1606 | * immediately at instantiation time for a client and after we receive the | |
1607 | * client's transport parameters for a server. | |
1608 | */ | |
1609 | static int ch_generate_transport_params(QUIC_CHANNEL *ch) | |
1610 | { | |
1611 | int ok = 0; | |
1612 | BUF_MEM *buf_mem = NULL; | |
1613 | WPACKET wpkt; | |
1614 | int wpkt_valid = 0; | |
1615 | size_t buf_len = 0; | |
1616 | ||
1617 | if (ch->local_transport_params != NULL) | |
1618 | goto err; | |
1619 | ||
1620 | if ((buf_mem = BUF_MEM_new()) == NULL) | |
1621 | goto err; | |
1622 | ||
1623 | if (!WPACKET_init(&wpkt, buf_mem)) | |
1624 | goto err; | |
1625 | ||
1626 | wpkt_valid = 1; | |
1627 | ||
1628 | if (ossl_quic_wire_encode_transport_param_bytes(&wpkt, QUIC_TPARAM_DISABLE_ACTIVE_MIGRATION, | |
1629 | NULL, 0) == NULL) | |
1630 | goto err; | |
1631 | ||
3c567a52 HL |
1632 | if (ch->is_server) { |
1633 | if (!ossl_quic_wire_encode_transport_param_cid(&wpkt, QUIC_TPARAM_ORIG_DCID, | |
1634 | &ch->init_dcid)) | |
1635 | goto err; | |
1636 | ||
1637 | if (!ossl_quic_wire_encode_transport_param_cid(&wpkt, QUIC_TPARAM_INITIAL_SCID, | |
bbc97540 | 1638 | &ch->cur_local_cid)) |
3c567a52 HL |
1639 | goto err; |
1640 | } else { | |
1641 | /* Client always uses an empty SCID. */ | |
1642 | if (ossl_quic_wire_encode_transport_param_bytes(&wpkt, QUIC_TPARAM_INITIAL_SCID, | |
1643 | NULL, 0) == NULL) | |
1644 | goto err; | |
1645 | } | |
f538b421 HL |
1646 | |
1647 | if (!ossl_quic_wire_encode_transport_param_int(&wpkt, QUIC_TPARAM_MAX_IDLE_TIMEOUT, | |
1648 | ch->max_idle_timeout)) | |
1649 | goto err; | |
1650 | ||
1651 | if (!ossl_quic_wire_encode_transport_param_int(&wpkt, QUIC_TPARAM_MAX_UDP_PAYLOAD_SIZE, | |
1652 | QUIC_MIN_INITIAL_DGRAM_LEN)) | |
1653 | goto err; | |
1654 | ||
1655 | if (!ossl_quic_wire_encode_transport_param_int(&wpkt, QUIC_TPARAM_ACTIVE_CONN_ID_LIMIT, | |
54bd1f24 | 1656 | QUIC_MIN_ACTIVE_CONN_ID_LIMIT)) |
f538b421 HL |
1657 | goto err; |
1658 | ||
f13868de HL |
1659 | if (ch->tx_max_ack_delay != QUIC_DEFAULT_MAX_ACK_DELAY |
1660 | && !ossl_quic_wire_encode_transport_param_int(&wpkt, QUIC_TPARAM_MAX_ACK_DELAY, | |
1661 | ch->tx_max_ack_delay)) | |
1662 | goto err; | |
1663 | ||
f538b421 HL |
1664 | if (!ossl_quic_wire_encode_transport_param_int(&wpkt, QUIC_TPARAM_INITIAL_MAX_DATA, |
1665 | ossl_quic_rxfc_get_cwm(&ch->conn_rxfc))) | |
1666 | goto err; | |
1667 | ||
0815b725 | 1668 | /* Send the default CWM for a new RXFC. */ |
f538b421 | 1669 | if (!ossl_quic_wire_encode_transport_param_int(&wpkt, QUIC_TPARAM_INITIAL_MAX_STREAM_DATA_BIDI_LOCAL, |
0815b725 | 1670 | ch->tx_init_max_stream_data_bidi_local)) |
f538b421 HL |
1671 | goto err; |
1672 | ||
1673 | if (!ossl_quic_wire_encode_transport_param_int(&wpkt, QUIC_TPARAM_INITIAL_MAX_STREAM_DATA_BIDI_REMOTE, | |
0815b725 | 1674 | ch->tx_init_max_stream_data_bidi_remote)) |
f538b421 HL |
1675 | goto err; |
1676 | ||
1677 | if (!ossl_quic_wire_encode_transport_param_int(&wpkt, QUIC_TPARAM_INITIAL_MAX_STREAM_DATA_UNI, | |
0815b725 | 1678 | ch->tx_init_max_stream_data_uni)) |
f538b421 HL |
1679 | goto err; |
1680 | ||
1681 | if (!ossl_quic_wire_encode_transport_param_int(&wpkt, QUIC_TPARAM_INITIAL_MAX_STREAMS_BIDI, | |
a6b6ea17 | 1682 | ossl_quic_rxfc_get_cwm(&ch->max_streams_bidi_rxfc))) |
f538b421 HL |
1683 | goto err; |
1684 | ||
1685 | if (!ossl_quic_wire_encode_transport_param_int(&wpkt, QUIC_TPARAM_INITIAL_MAX_STREAMS_UNI, | |
a6b6ea17 | 1686 | ossl_quic_rxfc_get_cwm(&ch->max_streams_uni_rxfc))) |
f538b421 HL |
1687 | goto err; |
1688 | ||
eff04652 TM |
1689 | if (!WPACKET_finish(&wpkt)) |
1690 | goto err; | |
1691 | ||
1692 | wpkt_valid = 0; | |
1693 | ||
f538b421 HL |
1694 | if (!WPACKET_get_total_written(&wpkt, &buf_len)) |
1695 | goto err; | |
1696 | ||
1697 | ch->local_transport_params = (unsigned char *)buf_mem->data; | |
1698 | buf_mem->data = NULL; | |
1699 | ||
f538b421 | 1700 | |
2723d705 | 1701 | if (!ossl_quic_tls_set_transport_params(ch->qtls, ch->local_transport_params, |
f538b421 HL |
1702 | buf_len)) |
1703 | goto err; | |
1704 | ||
1705 | ok = 1; | |
1706 | err: | |
1707 | if (wpkt_valid) | |
1708 | WPACKET_cleanup(&wpkt); | |
1709 | BUF_MEM_free(buf_mem); | |
1710 | return ok; | |
1711 | } | |
1712 | ||
1713 | /* | |
1714 | * QUIC Channel: Ticker-Mutator | |
1715 | * ============================ | |
1716 | */ | |
1717 | ||
1718 | /* | |
1719 | * The central ticker function called by the reactor. This does everything, or | |
1720 | * at least everything network I/O related. Best effort - not allowed to fail | |
1721 | * "loudly". | |
1722 | */ | |
632b0c7e HL |
1723 | void ossl_quic_channel_subtick(QUIC_CHANNEL *ch, QUIC_TICK_RESULT *res, |
1724 | uint32_t flags) | |
f538b421 HL |
1725 | { |
1726 | OSSL_TIME now, deadline; | |
9cf091a3 | 1727 | int channel_only = (flags & QUIC_REACTOR_TICK_FLAG_CHANNEL_ONLY) != 0; |
f538b421 HL |
1728 | |
1729 | /* | |
1730 | * When we tick the QUIC connection, we do everything we need to do | |
632b0c7e HL |
1731 | * periodically. Network I/O handling will already have been performed |
1732 | * as necessary by the QUIC port. Thus, in order, we: | |
f538b421 | 1733 | * |
632b0c7e HL |
1734 | * - handle any packets the DEMUX has queued up for us; |
1735 | * - handle any timer events which are due to fire (ACKM, etc.); | |
1736 | * - generate any packets which need to be sent; | |
f538b421 HL |
1737 | * - determine the time at which we should next be ticked. |
1738 | */ | |
1739 | ||
1740 | /* If we are in the TERMINATED state, there is nothing to do. */ | |
c12e1113 | 1741 | if (ossl_quic_channel_is_terminated(ch)) { |
b639475a HL |
1742 | res->net_read_desired = 0; |
1743 | res->net_write_desired = 0; | |
1744 | res->tick_deadline = ossl_time_infinite(); | |
f538b421 HL |
1745 | return; |
1746 | } | |
1747 | ||
1748 | /* | |
1749 | * If we are in the TERMINATING state, check if the terminating timer has | |
1750 | * expired. | |
1751 | */ | |
c12e1113 | 1752 | if (ossl_quic_channel_is_terminating(ch)) { |
b212d554 | 1753 | now = get_time(ch); |
f538b421 HL |
1754 | |
1755 | if (ossl_time_compare(now, ch->terminate_deadline) >= 0) { | |
1756 | ch_on_terminating_timeout(ch); | |
b639475a HL |
1757 | res->net_read_desired = 0; |
1758 | res->net_write_desired = 0; | |
1759 | res->tick_deadline = ossl_time_infinite(); | |
f538b421 HL |
1760 | return; /* abort normal processing, nothing to do */ |
1761 | } | |
1762 | } | |
1763 | ||
22739cc3 | 1764 | if (!ch->port->engine->inhibit_tick) { |
03b38595 HL |
1765 | /* Handle RXKU timeouts. */ |
1766 | ch_rxku_tick(ch); | |
8a65e7a5 | 1767 | |
03b38595 HL |
1768 | do { |
1769 | /* Process queued incoming packets. */ | |
82b7a0ee HL |
1770 | ch->did_tls_tick = 0; |
1771 | ch->have_new_rx_secret = 0; | |
1772 | ch_rx(ch, channel_only); | |
f538b421 | 1773 | |
03b38595 HL |
1774 | /* |
1775 | * Allow the handshake layer to check for any new incoming data and | |
1776 | * generate new outgoing data. | |
1777 | */ | |
82b7a0ee HL |
1778 | if (!ch->did_tls_tick) |
1779 | ch_tick_tls(ch, channel_only); | |
80bcc4f1 | 1780 | |
03b38595 HL |
1781 | /* |
1782 | * If the handshake layer gave us a new secret, we need to do RX | |
1783 | * again because packets that were not previously processable and | |
1784 | * were deferred might now be processable. | |
1785 | * | |
44cb36d0 | 1786 | * TODO(QUIC FUTURE): Consider handling this in the yield_secret callback. |
03b38595 HL |
1787 | */ |
1788 | } while (ch->have_new_rx_secret); | |
1789 | } | |
f538b421 HL |
1790 | |
1791 | /* | |
03b38595 HL |
1792 | * Handle any timer events which are due to fire; namely, the loss |
1793 | * detection deadline and the idle timeout. | |
f538b421 | 1794 | * |
03b38595 HL |
1795 | * ACKM ACK generation deadline is polled by TXP, so we don't need to |
1796 | * handle it here. | |
f538b421 | 1797 | */ |
b212d554 | 1798 | now = get_time(ch); |
f538b421 HL |
1799 | if (ossl_time_compare(now, ch->idle_deadline) >= 0) { |
1800 | /* | |
03b38595 HL |
1801 | * Idle timeout differs from normal protocol violation because we do |
1802 | * not send a CONN_CLOSE frame; go straight to TERMINATED. | |
f538b421 | 1803 | */ |
22739cc3 | 1804 | if (!ch->port->engine->inhibit_tick) |
03b38595 HL |
1805 | ch_on_idle_timeout(ch); |
1806 | ||
b639475a HL |
1807 | res->net_read_desired = 0; |
1808 | res->net_write_desired = 0; | |
1809 | res->tick_deadline = ossl_time_infinite(); | |
f538b421 HL |
1810 | return; |
1811 | } | |
1812 | ||
22739cc3 | 1813 | if (!ch->port->engine->inhibit_tick) { |
03b38595 HL |
1814 | deadline = ossl_ackm_get_loss_detection_deadline(ch->ackm); |
1815 | if (!ossl_time_is_zero(deadline) | |
1816 | && ossl_time_compare(now, deadline) >= 0) | |
1817 | ossl_ackm_on_timeout(ch->ackm); | |
f538b421 | 1818 | |
03b38595 HL |
1819 | /* If a ping is due, inform TXP. */ |
1820 | if (ossl_time_compare(now, ch->ping_deadline) >= 0) { | |
1821 | int pn_space = ossl_quic_enc_level_to_pn_space(ch->tx_enc_level); | |
3b1ab5a3 | 1822 | |
03b38595 | 1823 | ossl_quic_tx_packetiser_schedule_ack_eliciting(ch->txp, pn_space); |
c7ed5e46 HL |
1824 | |
1825 | /* | |
1826 | * If we have no CC budget at this time we cannot process the above | |
1827 | * PING request immediately. In any case we have scheduled the | |
1828 | * request so bump the ping deadline. If we don't do this we will | |
1829 | * busy-loop endlessly as the above deadline comparison condition | |
1830 | * will still be met. | |
1831 | */ | |
1832 | ch_update_ping_deadline(ch); | |
03b38595 | 1833 | } |
3b1ab5a3 | 1834 | |
632b0c7e | 1835 | /* Queue any data to be sent for transmission. */ |
03b38595 | 1836 | ch_tx(ch); |
f538b421 | 1837 | |
03b38595 HL |
1838 | /* Do stream GC. */ |
1839 | ossl_quic_stream_map_gc(&ch->qsm); | |
1840 | } | |
0847e63e | 1841 | |
f538b421 HL |
1842 | /* Determine the time at which we should next be ticked. */ |
1843 | res->tick_deadline = ch_determine_next_tick_deadline(ch); | |
1844 | ||
df15e990 | 1845 | /* |
632b0c7e HL |
1846 | * Always process network input unless we are now terminated. Although we |
1847 | * had not terminated at the beginning of this tick, network errors in | |
1848 | * ch_tx() may have caused us to transition to the Terminated state. | |
df15e990 | 1849 | */ |
c12e1113 | 1850 | res->net_read_desired = !ossl_quic_channel_is_terminated(ch); |
f538b421 | 1851 | |
632b0c7e | 1852 | /* We want to write to the network if we have any data in our TX queue. */ |
b639475a | 1853 | res->net_write_desired |
c12e1113 | 1854 | = (!ossl_quic_channel_is_terminated(ch) |
df15e990 | 1855 | && ossl_qtx_get_queue_len_datagrams(ch->qtx) > 0); |
f538b421 HL |
1856 | } |
1857 | ||
82b7a0ee HL |
1858 | static int ch_tick_tls(QUIC_CHANNEL *ch, int channel_only) |
1859 | { | |
1860 | uint64_t error_code; | |
1861 | const char *error_msg; | |
1862 | ERR_STATE *error_state = NULL; | |
1863 | ||
1864 | if (channel_only) | |
1865 | return 1; | |
1866 | ||
1867 | ch->did_tls_tick = 1; | |
1868 | ossl_quic_tls_tick(ch->qtls); | |
1869 | ||
1870 | if (ossl_quic_tls_get_error(ch->qtls, &error_code, &error_msg, | |
1871 | &error_state)) { | |
1872 | ossl_quic_channel_raise_protocol_error_state(ch, error_code, 0, | |
1873 | error_msg, error_state); | |
1874 | return 0; | |
1875 | } | |
1876 | ||
1877 | return 1; | |
1878 | } | |
1879 | ||
48120ea5 HL |
1880 | /* Check incoming forged packet limit and terminate connection if needed. */ |
1881 | static void ch_rx_check_forged_pkt_limit(QUIC_CHANNEL *ch) | |
1882 | { | |
1883 | uint32_t enc_level; | |
1884 | uint64_t limit = UINT64_MAX, l; | |
1885 | ||
1886 | for (enc_level = QUIC_ENC_LEVEL_INITIAL; | |
1887 | enc_level < QUIC_ENC_LEVEL_NUM; | |
1888 | ++enc_level) | |
1889 | { | |
1890 | /* | |
1891 | * Different ELs can have different AEADs which can in turn impose | |
1892 | * different limits, so use the lowest value of any currently valid EL. | |
1893 | */ | |
1894 | if ((ch->el_discarded & (1U << enc_level)) != 0) | |
1895 | continue; | |
1896 | ||
1897 | if (enc_level > ch->rx_enc_level) | |
1898 | break; | |
1899 | ||
1900 | l = ossl_qrx_get_max_forged_pkt_count(ch->qrx, enc_level); | |
1901 | if (l < limit) | |
1902 | limit = l; | |
1903 | } | |
1904 | ||
1905 | if (ossl_qrx_get_cur_forged_pkt_count(ch->qrx) < limit) | |
1906 | return; | |
1907 | ||
1908 | ossl_quic_channel_raise_protocol_error(ch, QUIC_ERR_AEAD_LIMIT_REACHED, 0, | |
1909 | "forgery limit"); | |
1910 | } | |
1911 | ||
3bf4dc8c | 1912 | /* Process queued incoming packets and handle frames, if any. */ |
82b7a0ee | 1913 | static int ch_rx(QUIC_CHANNEL *ch, int channel_only) |
f538b421 HL |
1914 | { |
1915 | int handled_any = 0; | |
50e76846 | 1916 | const int closing = ossl_quic_channel_is_closing(ch); |
f538b421 | 1917 | |
b1b06da2 | 1918 | if (!ch->is_server && !ch->have_sent_any_pkt) |
f538b421 HL |
1919 | /* |
1920 | * We have not sent anything yet, therefore there is no need to check | |
75b2920a | 1921 | * for incoming data. |
f538b421 HL |
1922 | */ |
1923 | return 1; | |
1924 | ||
f538b421 HL |
1925 | for (;;) { |
1926 | assert(ch->qrx_pkt == NULL); | |
1927 | ||
1928 | if (!ossl_qrx_read_pkt(ch->qrx, &ch->qrx_pkt)) | |
1929 | break; | |
1930 | ||
50e76846 P |
1931 | /* Track the amount of data received while in the closing state */ |
1932 | if (closing) | |
1933 | ossl_quic_tx_packetiser_record_received_closing_bytes( | |
1934 | ch->txp, ch->qrx_pkt->hdr->len); | |
1935 | ||
8fd32a0e | 1936 | if (!handled_any) { |
f538b421 | 1937 | ch_update_idle(ch); |
8fd32a0e TM |
1938 | ch_update_ping_deadline(ch); |
1939 | } | |
f538b421 | 1940 | |
82b7a0ee | 1941 | ch_rx_handle_packet(ch, channel_only); /* best effort */ |
f538b421 HL |
1942 | |
1943 | /* | |
1944 | * Regardless of the outcome of frame handling, unref the packet. | |
1945 | * This will free the packet unless something added another | |
1946 | * reference to it during frame processing. | |
1947 | */ | |
1948 | ossl_qrx_pkt_release(ch->qrx_pkt); | |
1949 | ch->qrx_pkt = NULL; | |
1950 | ||
3b1ab5a3 | 1951 | ch->have_sent_ack_eliciting_since_rx = 0; |
f538b421 HL |
1952 | handled_any = 1; |
1953 | } | |
1954 | ||
48120ea5 HL |
1955 | ch_rx_check_forged_pkt_limit(ch); |
1956 | ||
f538b421 HL |
1957 | /* |
1958 | * When in TERMINATING - CLOSING, generate a CONN_CLOSE frame whenever we | |
1959 | * process one or more incoming packets. | |
1960 | */ | |
50e76846 | 1961 | if (handled_any && closing) |
f538b421 HL |
1962 | ch->conn_close_queued = 1; |
1963 | ||
1964 | return 1; | |
1965 | } | |
1966 | ||
3ffb7d10 HL |
1967 | static int bio_addr_eq(const BIO_ADDR *a, const BIO_ADDR *b) |
1968 | { | |
1969 | if (BIO_ADDR_family(a) != BIO_ADDR_family(b)) | |
1970 | return 0; | |
1971 | ||
1972 | switch (BIO_ADDR_family(a)) { | |
1973 | case AF_INET: | |
1974 | return !memcmp(&a->s_in.sin_addr, | |
1975 | &b->s_in.sin_addr, | |
1976 | sizeof(a->s_in.sin_addr)) | |
1977 | && a->s_in.sin_port == b->s_in.sin_port; | |
9c8d04db | 1978 | #if OPENSSL_USE_IPV6 |
3ffb7d10 HL |
1979 | case AF_INET6: |
1980 | return !memcmp(&a->s_in6.sin6_addr, | |
1981 | &b->s_in6.sin6_addr, | |
1982 | sizeof(a->s_in6.sin6_addr)) | |
1983 | && a->s_in6.sin6_port == b->s_in6.sin6_port; | |
9c8d04db | 1984 | #endif |
3ffb7d10 HL |
1985 | default: |
1986 | return 0; /* not supported */ | |
1987 | } | |
1988 | ||
1989 | return 1; | |
1990 | } | |
1991 | ||
f538b421 | 1992 | /* Handles the packet currently in ch->qrx_pkt->hdr. */ |
82b7a0ee | 1993 | static void ch_rx_handle_packet(QUIC_CHANNEL *ch, int channel_only) |
f538b421 HL |
1994 | { |
1995 | uint32_t enc_level; | |
777a8a7f | 1996 | int old_have_processed_any_pkt = ch->have_processed_any_pkt; |
f538b421 HL |
1997 | |
1998 | assert(ch->qrx_pkt != NULL); | |
1999 | ||
50e76846 P |
2000 | /* |
2001 | * RFC 9000 s. 10.2.1 Closing Connection State: | |
2002 | * An endpoint that is closing is not required to process any | |
2003 | * received frame. | |
2004 | */ | |
8a6a00e3 | 2005 | if (!ossl_quic_channel_is_active(ch)) |
8a6a00e3 HL |
2006 | return; |
2007 | ||
f538b421 HL |
2008 | if (ossl_quic_pkt_type_is_encrypted(ch->qrx_pkt->hdr->type)) { |
2009 | if (!ch->have_received_enc_pkt) { | |
eff04652 | 2010 | ch->cur_remote_dcid = ch->init_scid = ch->qrx_pkt->hdr->src_conn_id; |
f538b421 HL |
2011 | ch->have_received_enc_pkt = 1; |
2012 | ||
2013 | /* | |
2014 | * We change to using the SCID in the first Initial packet as the | |
2015 | * DCID. | |
2016 | */ | |
2017 | ossl_quic_tx_packetiser_set_cur_dcid(ch->txp, &ch->init_scid); | |
2018 | } | |
2019 | ||
2020 | enc_level = ossl_quic_pkt_type_to_enc_level(ch->qrx_pkt->hdr->type); | |
2021 | if ((ch->el_discarded & (1U << enc_level)) != 0) | |
2022 | /* Do not process packets from ELs we have already discarded. */ | |
2023 | return; | |
2024 | } | |
2025 | ||
3ffb7d10 HL |
2026 | /* |
2027 | * RFC 9000 s. 9.6: "If a client receives packets from a new server address | |
2028 | * when the client has not initiated a migration to that address, the client | |
2029 | * SHOULD discard these packets." | |
2030 | * | |
2031 | * We need to be a bit careful here as due to the BIO abstraction layer an | |
2032 | * application is liable to be weird and lie to us about peer addresses. | |
96b7df60 HL |
2033 | * Only apply this check if we actually are using a real AF_INET or AF_INET6 |
2034 | * address. | |
3ffb7d10 HL |
2035 | */ |
2036 | if (!ch->is_server | |
2037 | && ch->qrx_pkt->peer != NULL | |
9c8d04db TC |
2038 | && ( |
2039 | BIO_ADDR_family(&ch->cur_peer_addr) == AF_INET | |
2040 | #if OPENSSL_USE_IPV6 | |
2041 | || BIO_ADDR_family(&ch->cur_peer_addr) == AF_INET6 | |
2042 | #endif | |
2043 | ) | |
3ffb7d10 HL |
2044 | && !bio_addr_eq(ch->qrx_pkt->peer, &ch->cur_peer_addr)) |
2045 | return; | |
2046 | ||
0911cb4a HL |
2047 | if (!ch->is_server |
2048 | && ch->have_received_enc_pkt | |
2049 | && ossl_quic_pkt_type_has_scid(ch->qrx_pkt->hdr->type)) { | |
2050 | /* | |
3ffb7d10 | 2051 | * RFC 9000 s. 7.2: "Once a client has received a valid Initial packet |
0911cb4a HL |
2052 | * from the server, it MUST discard any subsequent packet it receives on |
2053 | * that connection with a different SCID." | |
2054 | */ | |
2055 | if (!ossl_quic_conn_id_eq(&ch->qrx_pkt->hdr->src_conn_id, | |
2056 | &ch->init_scid)) | |
2057 | return; | |
2058 | } | |
2059 | ||
2060 | if (ossl_quic_pkt_type_has_version(ch->qrx_pkt->hdr->type) | |
2061 | && ch->qrx_pkt->hdr->version != QUIC_VERSION_1) | |
2062 | /* | |
2063 | * RFC 9000 s. 5.2.1: If a client receives a packet that uses a | |
2064 | * different version than it initially selected, it MUST discard the | |
2065 | * packet. We only ever use v1, so require it. | |
2066 | */ | |
2067 | return; | |
2068 | ||
777a8a7f HL |
2069 | ch->have_processed_any_pkt = 1; |
2070 | ||
08cb9a83 HL |
2071 | /* |
2072 | * RFC 9000 s. 17.2: "An endpoint MUST treat receipt of a packet that has a | |
2073 | * non-zero value for [the reserved bits] after removing both packet and | |
2074 | * header protection as a connection error of type PROTOCOL_VIOLATION." | |
2075 | */ | |
2076 | if (ossl_quic_pkt_type_is_encrypted(ch->qrx_pkt->hdr->type) | |
2077 | && ch->qrx_pkt->hdr->reserved != 0) { | |
2078 | ossl_quic_channel_raise_protocol_error(ch, QUIC_ERR_PROTOCOL_VIOLATION, | |
2079 | 0, "packet header reserved bits"); | |
2080 | return; | |
2081 | } | |
2082 | ||
f538b421 HL |
2083 | /* Handle incoming packet. */ |
2084 | switch (ch->qrx_pkt->hdr->type) { | |
75b2920a | 2085 | case QUIC_PKT_TYPE_RETRY: |
b1b06da2 | 2086 | if (ch->doing_retry || ch->is_server) |
75b2920a HL |
2087 | /* |
2088 | * It is not allowed to ask a client to do a retry more than | |
b1b06da2 | 2089 | * once. Clients may not send retries. |
75b2920a HL |
2090 | */ |
2091 | return; | |
f538b421 | 2092 | |
56e30325 MC |
2093 | /* |
2094 | * RFC 9000 s 17.2.5.2: After the client has received and processed an | |
2095 | * Initial or Retry packet from the server, it MUST discard any | |
2096 | * subsequent Retry packets that it receives. | |
2097 | */ | |
2098 | if (ch->have_received_enc_pkt) | |
2099 | return; | |
2100 | ||
75b2920a HL |
2101 | if (ch->qrx_pkt->hdr->len <= QUIC_RETRY_INTEGRITY_TAG_LEN) |
2102 | /* Packets with zero-length Retry Tokens are invalid. */ | |
2103 | return; | |
f538b421 | 2104 | |
75b2920a | 2105 | /* |
44cb36d0 | 2106 | * TODO(QUIC FUTURE): Theoretically this should probably be in the QRX. |
75b2920a HL |
2107 | * However because validation is dependent on context (namely the |
2108 | * client's initial DCID) we can't do this cleanly. In the future we | |
2109 | * should probably add a callback to the QRX to let it call us (via | |
2110 | * the DEMUX) and ask us about the correct original DCID, rather | |
2111 | * than allow the QRX to emit a potentially malformed packet to the | |
2112 | * upper layers. However, special casing this will do for now. | |
2113 | */ | |
22739cc3 HL |
2114 | if (!ossl_quic_validate_retry_integrity_tag(ch->port->engine->libctx, |
2115 | ch->port->engine->propq, | |
75b2920a HL |
2116 | ch->qrx_pkt->hdr, |
2117 | &ch->init_dcid)) | |
2118 | /* Malformed retry packet, ignore. */ | |
2119 | return; | |
f538b421 | 2120 | |
96014840 TM |
2121 | if (!ch_retry(ch, ch->qrx_pkt->hdr->data, |
2122 | ch->qrx_pkt->hdr->len - QUIC_RETRY_INTEGRITY_TAG_LEN, | |
2123 | &ch->qrx_pkt->hdr->src_conn_id)) | |
2124 | ossl_quic_channel_raise_protocol_error(ch, QUIC_ERR_INTERNAL_ERROR, | |
2125 | 0, "handling retry packet"); | |
75b2920a | 2126 | break; |
f538b421 | 2127 | |
75b2920a | 2128 | case QUIC_PKT_TYPE_0RTT: |
b1b06da2 HL |
2129 | if (!ch->is_server) |
2130 | /* Clients should never receive 0-RTT packets. */ | |
2131 | return; | |
2132 | ||
2133 | /* | |
44cb36d0 TM |
2134 | * TODO(QUIC 0RTT): Implement 0-RTT on the server side. We currently |
2135 | * do not need to implement this as a client can only do 0-RTT if we | |
b1b06da2 HL |
2136 | * have given it permission to in a previous session. |
2137 | */ | |
75b2920a HL |
2138 | break; |
2139 | ||
b1b06da2 HL |
2140 | case QUIC_PKT_TYPE_INITIAL: |
2141 | case QUIC_PKT_TYPE_HANDSHAKE: | |
2142 | case QUIC_PKT_TYPE_1RTT: | |
b6125b54 | 2143 | if (ch->is_server && ch->qrx_pkt->hdr->type == QUIC_PKT_TYPE_HANDSHAKE) |
75b2920a HL |
2144 | /* |
2145 | * We automatically drop INITIAL EL keys when first successfully | |
2146 | * decrypting a HANDSHAKE packet, as per the RFC. | |
2147 | */ | |
2148 | ch_discard_el(ch, QUIC_ENC_LEVEL_INITIAL); | |
2149 | ||
54fb0072 HL |
2150 | if (ch->rxku_in_progress |
2151 | && ch->qrx_pkt->hdr->type == QUIC_PKT_TYPE_1RTT | |
2152 | && ch->qrx_pkt->pn >= ch->rxku_trigger_pn | |
2153 | && ch->qrx_pkt->key_epoch < ossl_qrx_get_key_epoch(ch->qrx)) { | |
2154 | /* | |
2155 | * RFC 9001 s. 6.4: Packets with higher packet numbers MUST be | |
2156 | * protected with either the same or newer packet protection keys | |
2157 | * than packets with lower packet numbers. An endpoint that | |
2158 | * successfully removes protection with old keys when newer keys | |
2159 | * were used for packets with lower packet numbers MUST treat this | |
2160 | * as a connection error of type KEY_UPDATE_ERROR. | |
2161 | */ | |
2162 | ossl_quic_channel_raise_protocol_error(ch, QUIC_ERR_KEY_UPDATE_ERROR, | |
2163 | 0, "new packet with old keys"); | |
2164 | break; | |
2165 | } | |
2166 | ||
fd0d5932 HL |
2167 | if (!ch->is_server |
2168 | && ch->qrx_pkt->hdr->type == QUIC_PKT_TYPE_INITIAL | |
2169 | && ch->qrx_pkt->hdr->token_len > 0) { | |
2170 | /* | |
2171 | * RFC 9000 s. 17.2.2: Clients that receive an Initial packet with a | |
2172 | * non-zero Token Length field MUST either discard the packet or | |
2173 | * generate a connection error of type PROTOCOL_VIOLATION. | |
bed20874 | 2174 | * |
8e520d27 | 2175 | * TODO(QUIC FUTURE): consider the implications of RFC 9000 s. 10.2.3 |
bed20874 P |
2176 | * Immediate Close during the Handshake: |
2177 | * However, at the cost of reducing feedback about | |
2178 | * errors for legitimate peers, some forms of denial of | |
2179 | * service can be made more difficult for an attacker | |
2180 | * if endpoints discard illegal packets rather than | |
2181 | * terminating a connection with CONNECTION_CLOSE. For | |
2182 | * this reason, endpoints MAY discard packets rather | |
2183 | * than immediately close if errors are detected in | |
2184 | * packets that lack authentication. | |
2185 | * I.e. should we drop this packet instead of closing the connection? | |
fd0d5932 HL |
2186 | */ |
2187 | ossl_quic_channel_raise_protocol_error(ch, QUIC_ERR_PROTOCOL_VIOLATION, | |
2188 | 0, "client received initial token"); | |
2189 | break; | |
2190 | } | |
2191 | ||
75b2920a HL |
2192 | /* This packet contains frames, pass to the RXDP. */ |
2193 | ossl_quic_handle_frames(ch, ch->qrx_pkt); /* best effort */ | |
82b7a0ee HL |
2194 | |
2195 | if (ch->did_crypto_frame) | |
2196 | ch_tick_tls(ch, channel_only); | |
2197 | ||
75b2920a | 2198 | break; |
b1b06da2 | 2199 | |
777a8a7f HL |
2200 | case QUIC_PKT_TYPE_VERSION_NEG: |
2201 | /* | |
2202 | * "A client MUST discard any Version Negotiation packet if it has | |
2203 | * received and successfully processed any other packet." | |
2204 | */ | |
2205 | if (!old_have_processed_any_pkt) | |
2206 | ch_rx_handle_version_neg(ch, ch->qrx_pkt); | |
2207 | ||
2208 | break; | |
2209 | ||
b1b06da2 HL |
2210 | default: |
2211 | assert(0); | |
2212 | break; | |
2213 | } | |
2214 | } | |
2215 | ||
777a8a7f HL |
2216 | static void ch_rx_handle_version_neg(QUIC_CHANNEL *ch, OSSL_QRX_PKT *pkt) |
2217 | { | |
2218 | /* | |
2219 | * We do not support version negotiation at this time. As per RFC 9000 s. | |
2220 | * 6.2., we MUST abandon the connection attempt if we receive a Version | |
2221 | * Negotiation packet, unless we have already successfully processed another | |
2222 | * incoming packet, or the packet lists the QUIC version we want to use. | |
2223 | */ | |
2224 | PACKET vpkt; | |
2225 | unsigned long v; | |
2226 | ||
2227 | if (!PACKET_buf_init(&vpkt, pkt->hdr->data, pkt->hdr->len)) | |
2228 | return; | |
2229 | ||
2230 | while (PACKET_remaining(&vpkt) > 0) { | |
2231 | if (!PACKET_get_net_4(&vpkt, &v)) | |
2232 | break; | |
2233 | ||
2234 | if ((uint32_t)v == QUIC_VERSION_1) | |
2235 | return; | |
2236 | } | |
2237 | ||
2238 | /* No match, this is a failure case. */ | |
2239 | ch_raise_version_neg_failure(ch); | |
2240 | } | |
2241 | ||
2242 | static void ch_raise_version_neg_failure(QUIC_CHANNEL *ch) | |
2243 | { | |
2244 | QUIC_TERMINATE_CAUSE tcause = {0}; | |
2245 | ||
2246 | tcause.error_code = QUIC_ERR_CONNECTION_REFUSED; | |
2247 | tcause.reason = "version negotiation failure"; | |
2248 | tcause.reason_len = strlen(tcause.reason); | |
2249 | ||
2250 | /* | |
2251 | * Skip TERMINATING state; this is not considered a protocol error and we do | |
2252 | * not send CONNECTION_CLOSE. | |
2253 | */ | |
2254 | ch_start_terminating(ch, &tcause, 1); | |
2255 | } | |
2256 | ||
f538b421 HL |
2257 | /* Try to generate packets and if possible, flush them to the network. */ |
2258 | static int ch_tx(QUIC_CHANNEL *ch) | |
2259 | { | |
a3a51d6e | 2260 | QUIC_TXP_STATUS status; |
64fd6991 | 2261 | int res; |
3b1ab5a3 | 2262 | |
afe4a797 P |
2263 | /* |
2264 | * RFC 9000 s. 10.2.2: Draining Connection State: | |
2265 | * While otherwise identical to the closing state, an endpoint | |
2266 | * in the draining state MUST NOT send any packets. | |
2267 | * and: | |
2268 | * An endpoint MUST NOT send further packets. | |
2269 | */ | |
2270 | if (ossl_quic_channel_is_draining(ch)) | |
2271 | return 0; | |
2272 | ||
2273 | if (ossl_quic_channel_is_closing(ch)) { | |
f538b421 HL |
2274 | /* |
2275 | * While closing, only send CONN_CLOSE if we've received more traffic | |
2276 | * from the peer. Once we tell the TXP to generate CONN_CLOSE, all | |
2277 | * future calls to it generate CONN_CLOSE frames, so otherwise we would | |
2278 | * just constantly generate CONN_CLOSE frames. | |
6b3b5f9d | 2279 | * |
afe4a797 | 2280 | * Confirming to RFC 9000 s. 10.2.1 Closing Connection State: |
6b3b5f9d | 2281 | * An endpoint SHOULD limit the rate at which it generates |
afe4a797 | 2282 | * packets in the closing state. |
f538b421 HL |
2283 | */ |
2284 | if (!ch->conn_close_queued) | |
2285 | return 0; | |
2286 | ||
2287 | ch->conn_close_queued = 0; | |
2288 | } | |
2289 | ||
8a65e7a5 HL |
2290 | /* Do TXKU if we need to. */ |
2291 | ch_maybe_trigger_spontaneous_txku(ch); | |
2292 | ||
2293 | ch->rxku_pending_confirm_done = 0; | |
2294 | ||
aa433014 MC |
2295 | /* Loop until we stop generating packets to send */ |
2296 | do { | |
3b1ab5a3 | 2297 | /* |
aa433014 MC |
2298 | * Send packet, if we need to. Best effort. The TXP consults the CC and |
2299 | * applies any limitations imposed by it, so we don't need to do it here. | |
2300 | * | |
2301 | * Best effort. In particular if TXP fails for some reason we should | |
2302 | * still flush any queued packets which we already generated. | |
2303 | */ | |
2304 | res = ossl_quic_tx_packetiser_generate(ch->txp, &status); | |
2305 | if (status.sent_pkt > 0) { | |
2306 | ch->have_sent_any_pkt = 1; /* Packet(s) were sent */ | |
30513398 | 2307 | ch->port->have_sent_any_pkt = 1; |
3b1ab5a3 | 2308 | |
3eb0f9a7 | 2309 | /* |
aa433014 MC |
2310 | * RFC 9000 s. 10.1. 'An endpoint also restarts its idle timer when |
2311 | * sending an ack-eliciting packet if no other ack-eliciting packets | |
2312 | * have been sent since last receiving and processing a packet.' | |
2313 | */ | |
2314 | if (status.sent_ack_eliciting | |
2315 | && !ch->have_sent_ack_eliciting_since_rx) { | |
2316 | ch_update_idle(ch); | |
2317 | ch->have_sent_ack_eliciting_since_rx = 1; | |
2318 | } | |
3eb0f9a7 | 2319 | |
aa433014 MC |
2320 | if (!ch->is_server && status.sent_handshake) |
2321 | /* | |
2322 | * RFC 9001 s. 4.9.1: A client MUST discard Initial keys when it | |
2323 | * first sends a Handshake packet. | |
2324 | */ | |
2325 | ch_discard_el(ch, QUIC_ENC_LEVEL_INITIAL); | |
8a65e7a5 | 2326 | |
aa433014 MC |
2327 | if (ch->rxku_pending_confirm_done) |
2328 | ch->rxku_pending_confirm = 0; | |
5a1b1d2b | 2329 | |
aa433014 MC |
2330 | ch_update_ping_deadline(ch); |
2331 | } | |
2332 | ||
2333 | if (!res) { | |
2334 | /* | |
2335 | * One case where TXP can fail is if we reach a TX PN of 2**62 - 1. | |
2336 | * As per RFC 9000 s. 12.3, if this happens we MUST close the | |
2337 | * connection without sending a CONNECTION_CLOSE frame. This is | |
2338 | * actually handled as an emergent consequence of our design, as the | |
2339 | * TX packetiser will never transmit another packet when the TX PN | |
2340 | * reaches the limit. | |
2341 | * | |
2342 | * Calling the below function terminates the connection; its attempt | |
2343 | * to schedule a CONNECTION_CLOSE frame will not actually cause a | |
2344 | * packet to be transmitted for this reason. | |
2345 | */ | |
2346 | ossl_quic_channel_raise_protocol_error(ch, QUIC_ERR_INTERNAL_ERROR, | |
2347 | 0, | |
2348 | "internal error (txp generate)"); | |
2349 | break; | |
2350 | } | |
2351 | } while (status.sent_pkt > 0); | |
df15e990 HL |
2352 | |
2353 | /* Flush packets to network. */ | |
2354 | switch (ossl_qtx_flush_net(ch->qtx)) { | |
2355 | case QTX_FLUSH_NET_RES_OK: | |
2356 | case QTX_FLUSH_NET_RES_TRANSIENT_FAIL: | |
2357 | /* Best effort, done for now. */ | |
2358 | break; | |
2359 | ||
2360 | case QTX_FLUSH_NET_RES_PERMANENT_FAIL: | |
2361 | default: | |
2362 | /* Permanent underlying network BIO, start terminating. */ | |
4df4add2 | 2363 | ossl_quic_port_raise_net_error(ch->port, ch); |
df15e990 HL |
2364 | break; |
2365 | } | |
f538b421 | 2366 | |
f538b421 HL |
2367 | return 1; |
2368 | } | |
2369 | ||
2370 | /* Determine next tick deadline. */ | |
2371 | static OSSL_TIME ch_determine_next_tick_deadline(QUIC_CHANNEL *ch) | |
2372 | { | |
2373 | OSSL_TIME deadline; | |
ca711651 | 2374 | int i; |
f538b421 | 2375 | |
c12e1113 | 2376 | if (ossl_quic_channel_is_terminated(ch)) |
df15e990 HL |
2377 | return ossl_time_infinite(); |
2378 | ||
f538b421 HL |
2379 | deadline = ossl_ackm_get_loss_detection_deadline(ch->ackm); |
2380 | if (ossl_time_is_zero(deadline)) | |
2381 | deadline = ossl_time_infinite(); | |
2382 | ||
ca711651 | 2383 | /* |
4d100bb7 HL |
2384 | * Check the ack deadline for all enc_levels that are actually provisioned. |
2385 | * ACKs aren't restricted by CC. | |
ca711651 | 2386 | */ |
4d100bb7 HL |
2387 | for (i = 0; i < QUIC_ENC_LEVEL_NUM; i++) { |
2388 | if (ossl_qtx_is_enc_level_provisioned(ch->qtx, i)) { | |
2389 | deadline = ossl_time_min(deadline, | |
2390 | ossl_ackm_get_ack_deadline(ch->ackm, | |
2391 | ossl_quic_enc_level_to_pn_space(i))); | |
ca711651 MC |
2392 | } |
2393 | } | |
f538b421 | 2394 | |
4d100bb7 HL |
2395 | /* |
2396 | * When do we need to send an ACK-eliciting packet to reset the idle | |
2397 | * deadline timer for the peer? | |
2398 | */ | |
2399 | if (!ossl_time_is_infinite(ch->ping_deadline)) | |
2400 | deadline = ossl_time_min(deadline, ch->ping_deadline); | |
2401 | ||
c206f2aa HL |
2402 | /* Apply TXP wakeup deadline. */ |
2403 | deadline = ossl_time_min(deadline, | |
2404 | ossl_quic_tx_packetiser_get_deadline(ch->txp)); | |
f538b421 HL |
2405 | |
2406 | /* Is the terminating timer armed? */ | |
c12e1113 | 2407 | if (ossl_quic_channel_is_terminating(ch)) |
f538b421 HL |
2408 | deadline = ossl_time_min(deadline, |
2409 | ch->terminate_deadline); | |
2410 | else if (!ossl_time_is_infinite(ch->idle_deadline)) | |
2411 | deadline = ossl_time_min(deadline, | |
2412 | ch->idle_deadline); | |
2413 | ||
8a65e7a5 HL |
2414 | /* When does the RXKU process complete? */ |
2415 | if (ch->rxku_in_progress) | |
2416 | deadline = ossl_time_min(deadline, ch->rxku_update_end_deadline); | |
2417 | ||
f538b421 HL |
2418 | return deadline; |
2419 | } | |
2420 | ||
f538b421 HL |
2421 | /* |
2422 | * QUIC Channel: Lifecycle Events | |
2423 | * ============================== | |
2424 | */ | |
f538b421 HL |
2425 | int ossl_quic_channel_start(QUIC_CHANNEL *ch) |
2426 | { | |
b1b06da2 HL |
2427 | if (ch->is_server) |
2428 | /* | |
2429 | * This is not used by the server. The server moves to active | |
2430 | * automatically on receiving an incoming connection. | |
2431 | */ | |
2432 | return 0; | |
2433 | ||
f538b421 HL |
2434 | if (ch->state != QUIC_CHANNEL_STATE_IDLE) |
2435 | /* Calls to connect are idempotent */ | |
2436 | return 1; | |
2437 | ||
2438 | /* Inform QTX of peer address. */ | |
2439 | if (!ossl_quic_tx_packetiser_set_peer(ch->txp, &ch->cur_peer_addr)) | |
2440 | return 0; | |
2441 | ||
2442 | /* Plug in secrets for the Initial EL. */ | |
22739cc3 HL |
2443 | if (!ossl_quic_provide_initial_secret(ch->port->engine->libctx, |
2444 | ch->port->engine->propq, | |
f538b421 | 2445 | &ch->init_dcid, |
091f532e | 2446 | ch->is_server, |
f538b421 HL |
2447 | ch->qrx, ch->qtx)) |
2448 | return 0; | |
2449 | ||
2450 | /* Change state. */ | |
2451 | ch->state = QUIC_CHANNEL_STATE_ACTIVE; | |
2452 | ch->doing_proactive_ver_neg = 0; /* not currently supported */ | |
2453 | ||
2454 | /* Handshake layer: start (e.g. send CH). */ | |
82b7a0ee | 2455 | if (!ch_tick_tls(ch, /*channel_only=*/0)) |
f538b421 HL |
2456 | return 0; |
2457 | ||
632b0c7e | 2458 | ossl_quic_reactor_tick(ossl_quic_port_get0_reactor(ch->port), 0); /* best effort */ |
f538b421 HL |
2459 | return 1; |
2460 | } | |
2461 | ||
2462 | /* Start a locally initiated connection shutdown. */ | |
40c8c756 HL |
2463 | void ossl_quic_channel_local_close(QUIC_CHANNEL *ch, uint64_t app_error_code, |
2464 | const char *app_reason) | |
f538b421 HL |
2465 | { |
2466 | QUIC_TERMINATE_CAUSE tcause = {0}; | |
2467 | ||
c12e1113 | 2468 | if (ossl_quic_channel_is_term_any(ch)) |
f538b421 HL |
2469 | return; |
2470 | ||
e8043229 HL |
2471 | tcause.app = 1; |
2472 | tcause.error_code = app_error_code; | |
40c8c756 HL |
2473 | tcause.reason = app_reason; |
2474 | tcause.reason_len = app_reason != NULL ? strlen(app_reason) : 0; | |
df15e990 | 2475 | ch_start_terminating(ch, &tcause, 0); |
f538b421 HL |
2476 | } |
2477 | ||
2478 | static void free_token(const unsigned char *buf, size_t buf_len, void *arg) | |
2479 | { | |
2480 | OPENSSL_free((unsigned char *)buf); | |
2481 | } | |
2482 | ||
2483 | /* Called when a server asks us to do a retry. */ | |
2484 | static int ch_retry(QUIC_CHANNEL *ch, | |
2485 | const unsigned char *retry_token, | |
2486 | size_t retry_token_len, | |
2487 | const QUIC_CONN_ID *retry_scid) | |
2488 | { | |
2489 | void *buf; | |
2490 | ||
212616ed HL |
2491 | /* |
2492 | * RFC 9000 s. 17.2.5.1: "A client MUST discard a Retry packet that contains | |
2493 | * a SCID field that is identical to the DCID field of its initial packet." | |
2494 | */ | |
2495 | if (ossl_quic_conn_id_eq(&ch->init_dcid, retry_scid)) | |
96014840 | 2496 | return 1; |
212616ed | 2497 | |
f538b421 HL |
2498 | /* We change to using the SCID in the Retry packet as the DCID. */ |
2499 | if (!ossl_quic_tx_packetiser_set_cur_dcid(ch->txp, retry_scid)) | |
2500 | return 0; | |
2501 | ||
2502 | /* | |
2503 | * Now we retry. We will release the Retry packet immediately, so copy | |
2504 | * the token. | |
2505 | */ | |
e28f512f | 2506 | if ((buf = OPENSSL_memdup(retry_token, retry_token_len)) == NULL) |
f538b421 HL |
2507 | return 0; |
2508 | ||
461d4117 HL |
2509 | if (!ossl_quic_tx_packetiser_set_initial_token(ch->txp, buf, |
2510 | retry_token_len, | |
2511 | free_token, NULL)) { | |
2512 | /* | |
2513 | * This may fail if the token we receive is too big for us to ever be | |
2514 | * able to transmit in an outgoing Initial packet. | |
2515 | */ | |
2516 | ossl_quic_channel_raise_protocol_error(ch, QUIC_ERR_INVALID_TOKEN, 0, | |
2517 | "received oversize token"); | |
2518 | OPENSSL_free(buf); | |
2519 | return 0; | |
2520 | } | |
f538b421 HL |
2521 | |
2522 | ch->retry_scid = *retry_scid; | |
2523 | ch->doing_retry = 1; | |
2524 | ||
2525 | /* | |
2526 | * We need to stimulate the Initial EL to generate the first CRYPTO frame | |
2527 | * again. We can do this most cleanly by simply forcing the ACKM to consider | |
2528 | * the first Initial packet as lost, which it effectively was as the server | |
2529 | * hasn't processed it. This also maintains the desired behaviour with e.g. | |
2530 | * PNs not resetting and so on. | |
2531 | * | |
2532 | * The PN we used initially is always zero, because QUIC does not allow | |
2533 | * repeated retries. | |
2534 | */ | |
2535 | if (!ossl_ackm_mark_packet_pseudo_lost(ch->ackm, QUIC_PN_SPACE_INITIAL, | |
2536 | /*PN=*/0)) | |
2537 | return 0; | |
2538 | ||
2539 | /* | |
2540 | * Plug in new secrets for the Initial EL. This is the only time we change | |
2541 | * the secrets for an EL after we already provisioned it. | |
2542 | */ | |
22739cc3 HL |
2543 | if (!ossl_quic_provide_initial_secret(ch->port->engine->libctx, |
2544 | ch->port->engine->propq, | |
f538b421 HL |
2545 | &ch->retry_scid, |
2546 | /*is_server=*/0, | |
2547 | ch->qrx, ch->qtx)) | |
2548 | return 0; | |
2549 | ||
2550 | return 1; | |
2551 | } | |
2552 | ||
2553 | /* Called when an EL is to be discarded. */ | |
2554 | static int ch_discard_el(QUIC_CHANNEL *ch, | |
2555 | uint32_t enc_level) | |
2556 | { | |
2557 | if (!ossl_assert(enc_level < QUIC_ENC_LEVEL_1RTT)) | |
2558 | return 0; | |
2559 | ||
2560 | if ((ch->el_discarded & (1U << enc_level)) != 0) | |
2561 | /* Already done. */ | |
2562 | return 1; | |
2563 | ||
2564 | /* Best effort for all of these. */ | |
2565 | ossl_quic_tx_packetiser_discard_enc_level(ch->txp, enc_level); | |
2566 | ossl_qrx_discard_enc_level(ch->qrx, enc_level); | |
2567 | ossl_qtx_discard_enc_level(ch->qtx, enc_level); | |
2568 | ||
2569 | if (enc_level != QUIC_ENC_LEVEL_0RTT) { | |
2570 | uint32_t pn_space = ossl_quic_enc_level_to_pn_space(enc_level); | |
2571 | ||
2572 | ossl_ackm_on_pkt_space_discarded(ch->ackm, pn_space); | |
2573 | ||
2574 | /* We should still have crypto streams at this point. */ | |
79534440 HL |
2575 | if (!ossl_assert(ch->crypto_send[pn_space] != NULL) |
2576 | || !ossl_assert(ch->crypto_recv[pn_space] != NULL)) | |
2577 | return 0; | |
f538b421 HL |
2578 | |
2579 | /* Get rid of the crypto stream state for the EL. */ | |
2580 | ossl_quic_sstream_free(ch->crypto_send[pn_space]); | |
2581 | ch->crypto_send[pn_space] = NULL; | |
2582 | ||
2583 | ossl_quic_rstream_free(ch->crypto_recv[pn_space]); | |
2584 | ch->crypto_recv[pn_space] = NULL; | |
2585 | } | |
2586 | ||
2587 | ch->el_discarded |= (1U << enc_level); | |
2588 | return 1; | |
2589 | } | |
2590 | ||
2591 | /* Intended to be called by the RXDP. */ | |
2592 | int ossl_quic_channel_on_handshake_confirmed(QUIC_CHANNEL *ch) | |
2593 | { | |
2594 | if (ch->handshake_confirmed) | |
2595 | return 1; | |
2596 | ||
2597 | if (!ch->handshake_complete) { | |
2598 | /* | |
2599 | * Does not make sense for handshake to be confirmed before it is | |
2600 | * completed. | |
2601 | */ | |
2602 | ossl_quic_channel_raise_protocol_error(ch, QUIC_ERR_PROTOCOL_VIOLATION, | |
2603 | OSSL_QUIC_FRAME_TYPE_HANDSHAKE_DONE, | |
2604 | "handshake cannot be confirmed " | |
2605 | "before it is completed"); | |
2606 | return 0; | |
2607 | } | |
2608 | ||
2609 | ch_discard_el(ch, QUIC_ENC_LEVEL_HANDSHAKE); | |
2610 | ch->handshake_confirmed = 1; | |
29a541fe | 2611 | ossl_ackm_on_handshake_confirmed(ch->ackm); |
f538b421 HL |
2612 | return 1; |
2613 | } | |
2614 | ||
2615 | /* | |
2616 | * Master function used when we want to start tearing down a connection: | |
2617 | * | |
2618 | * - If the connection is still IDLE we can go straight to TERMINATED; | |
2619 | * | |
2620 | * - If we are already TERMINATED this is a no-op. | |
2621 | * | |
2622 | * - If we are TERMINATING - CLOSING and we have now got a CONNECTION_CLOSE | |
9bbc5b54 | 2623 | * from the peer (tcause->remote == 1), we move to TERMINATING - DRAINING. |
f538b421 HL |
2624 | * |
2625 | * - If we are TERMINATING - DRAINING, we remain here until the terminating | |
2626 | * timer expires. | |
2627 | * | |
2628 | * - Otherwise, we are in ACTIVE and move to TERMINATING - CLOSING. | |
2629 | * if we caused the termination (e.g. we have sent a CONNECTION_CLOSE). Note | |
2630 | * that we are considered to have caused a termination if we sent the first | |
2631 | * CONNECTION_CLOSE frame, even if it is caused by a peer protocol | |
2632 | * violation. If the peer sent the first CONNECTION_CLOSE frame, we move to | |
2633 | * TERMINATING - DRAINING. | |
2634 | * | |
2635 | * We record the termination cause structure passed on the first call only. | |
2636 | * Any successive calls have their termination cause data discarded; | |
2637 | * once we start sending a CONNECTION_CLOSE frame, we don't change the details | |
2638 | * in it. | |
6b3b5f9d P |
2639 | * |
2640 | * This conforms to RFC 9000 s. 10.2.1: Closing Connection State: | |
2641 | * To minimize the state that an endpoint maintains for a closing | |
2642 | * connection, endpoints MAY send the exact same packet in response | |
2643 | * to any received packet. | |
2644 | * | |
2645 | * We don't drop any connection state (specifically packet protection keys) | |
2646 | * even though we are permitted to. This conforms to RFC 9000 s. 10.2.1: | |
2647 | * Closing Connection State: | |
2648 | * An endpoint MAY retain packet protection keys for incoming | |
2649 | * packets to allow it to read and process a CONNECTION_CLOSE frame. | |
2650 | * | |
2651 | * Note that we do not conform to these two from the same section: | |
2652 | * An endpoint's selected connection ID and the QUIC version | |
2653 | * are sufficient information to identify packets for a closing | |
2654 | * connection; the endpoint MAY discard all other connection state. | |
2655 | * and: | |
2656 | * An endpoint MAY drop packet protection keys when entering the | |
2657 | * closing state and send a packet containing a CONNECTION_CLOSE | |
2658 | * frame in response to any UDP datagram that is received. | |
f538b421 | 2659 | */ |
40c8c756 HL |
2660 | static void copy_tcause(QUIC_TERMINATE_CAUSE *dst, |
2661 | const QUIC_TERMINATE_CAUSE *src) | |
2662 | { | |
2663 | dst->error_code = src->error_code; | |
2664 | dst->frame_type = src->frame_type; | |
2665 | dst->app = src->app; | |
2666 | dst->remote = src->remote; | |
2667 | ||
2668 | dst->reason = NULL; | |
2669 | dst->reason_len = 0; | |
2670 | ||
2671 | if (src->reason != NULL && src->reason_len > 0) { | |
2672 | size_t l = src->reason_len; | |
2673 | char *r; | |
2674 | ||
2675 | if (l >= SIZE_MAX) | |
2676 | --l; | |
2677 | ||
2678 | /* | |
2679 | * If this fails, dst->reason becomes NULL and we simply do not use a | |
2680 | * reason. This ensures termination is infallible. | |
2681 | */ | |
2682 | dst->reason = r = OPENSSL_memdup(src->reason, l + 1); | |
2683 | if (r == NULL) | |
2684 | return; | |
2685 | ||
2686 | r[l] = '\0'; | |
2687 | dst->reason_len = l; | |
2688 | } | |
2689 | } | |
2690 | ||
f538b421 | 2691 | static void ch_start_terminating(QUIC_CHANNEL *ch, |
df15e990 HL |
2692 | const QUIC_TERMINATE_CAUSE *tcause, |
2693 | int force_immediate) | |
f538b421 | 2694 | { |
549d0a70 HL |
2695 | /* No point sending anything if we haven't sent anything yet. */ |
2696 | if (!ch->have_sent_any_pkt) | |
2697 | force_immediate = 1; | |
2698 | ||
f538b421 | 2699 | switch (ch->state) { |
75b2920a HL |
2700 | default: |
2701 | case QUIC_CHANNEL_STATE_IDLE: | |
40c8c756 | 2702 | copy_tcause(&ch->terminate_cause, tcause); |
75b2920a HL |
2703 | ch_on_terminating_timeout(ch); |
2704 | break; | |
2705 | ||
2706 | case QUIC_CHANNEL_STATE_ACTIVE: | |
40c8c756 | 2707 | copy_tcause(&ch->terminate_cause, tcause); |
df15e990 HL |
2708 | |
2709 | if (!force_immediate) { | |
2710 | ch->state = tcause->remote ? QUIC_CHANNEL_STATE_TERMINATING_DRAINING | |
2711 | : QUIC_CHANNEL_STATE_TERMINATING_CLOSING; | |
a441d08b P |
2712 | /* |
2713 | * RFC 9000 s. 10.2 Immediate Close | |
2714 | * These states SHOULD persist for at least three times | |
2715 | * the current PTO interval as defined in [QUIC-RECOVERY]. | |
2716 | */ | |
df15e990 | 2717 | ch->terminate_deadline |
b212d554 | 2718 | = ossl_time_add(get_time(ch), |
df15e990 HL |
2719 | ossl_time_multiply(ossl_ackm_get_pto_duration(ch->ackm), |
2720 | 3)); | |
2721 | ||
2722 | if (!tcause->remote) { | |
2723 | OSSL_QUIC_FRAME_CONN_CLOSE f = {0}; | |
2724 | ||
2725 | /* best effort */ | |
2726 | f.error_code = ch->terminate_cause.error_code; | |
2727 | f.frame_type = ch->terminate_cause.frame_type; | |
2728 | f.is_app = ch->terminate_cause.app; | |
40c8c756 HL |
2729 | f.reason = (char *)ch->terminate_cause.reason; |
2730 | f.reason_len = ch->terminate_cause.reason_len; | |
df15e990 | 2731 | ossl_quic_tx_packetiser_schedule_conn_close(ch->txp, &f); |
afe4a797 P |
2732 | /* |
2733 | * RFC 9000 s. 10.2.2 Draining Connection State: | |
2734 | * An endpoint that receives a CONNECTION_CLOSE frame MAY | |
2735 | * send a single packet containing a CONNECTION_CLOSE | |
2736 | * frame before entering the draining state, using a | |
2737 | * NO_ERROR code if appropriate | |
2738 | */ | |
df15e990 HL |
2739 | ch->conn_close_queued = 1; |
2740 | } | |
2741 | } else { | |
2742 | ch_on_terminating_timeout(ch); | |
75b2920a HL |
2743 | } |
2744 | break; | |
f538b421 | 2745 | |
75b2920a | 2746 | case QUIC_CHANNEL_STATE_TERMINATING_CLOSING: |
df15e990 HL |
2747 | if (force_immediate) |
2748 | ch_on_terminating_timeout(ch); | |
2749 | else if (tcause->remote) | |
afe4a797 P |
2750 | /* |
2751 | * RFC 9000 s. 10.2.2 Draining Connection State: | |
2752 | * An endpoint MAY enter the draining state from the | |
2753 | * closing state if it receives a CONNECTION_CLOSE frame, | |
2754 | * which indicates that the peer is also closing or draining. | |
2755 | */ | |
75b2920a | 2756 | ch->state = QUIC_CHANNEL_STATE_TERMINATING_DRAINING; |
f538b421 | 2757 | |
75b2920a | 2758 | break; |
f538b421 | 2759 | |
75b2920a | 2760 | case QUIC_CHANNEL_STATE_TERMINATING_DRAINING: |
df15e990 HL |
2761 | /* |
2762 | * Other than in the force-immediate case, we remain here until the | |
eb4129e1 | 2763 | * timeout expires. |
df15e990 HL |
2764 | */ |
2765 | if (force_immediate) | |
2766 | ch_on_terminating_timeout(ch); | |
2767 | ||
75b2920a | 2768 | break; |
f538b421 | 2769 | |
75b2920a HL |
2770 | case QUIC_CHANNEL_STATE_TERMINATED: |
2771 | /* No-op. */ | |
2772 | break; | |
f538b421 HL |
2773 | } |
2774 | } | |
2775 | ||
2776 | /* For RXDP use. */ | |
2777 | void ossl_quic_channel_on_remote_conn_close(QUIC_CHANNEL *ch, | |
2778 | OSSL_QUIC_FRAME_CONN_CLOSE *f) | |
2779 | { | |
2780 | QUIC_TERMINATE_CAUSE tcause = {0}; | |
2781 | ||
2782 | if (!ossl_quic_channel_is_active(ch)) | |
2783 | return; | |
2784 | ||
2785 | tcause.remote = 1; | |
2786 | tcause.app = f->is_app; | |
2787 | tcause.error_code = f->error_code; | |
2788 | tcause.frame_type = f->frame_type; | |
40c8c756 HL |
2789 | tcause.reason = f->reason; |
2790 | tcause.reason_len = f->reason_len; | |
df15e990 HL |
2791 | ch_start_terminating(ch, &tcause, 0); |
2792 | } | |
2793 | ||
eff04652 TM |
2794 | static void free_frame_data(unsigned char *buf, size_t buf_len, void *arg) |
2795 | { | |
2796 | OPENSSL_free(buf); | |
2797 | } | |
2798 | ||
2799 | static int ch_enqueue_retire_conn_id(QUIC_CHANNEL *ch, uint64_t seq_num) | |
2800 | { | |
96014840 | 2801 | BUF_MEM *buf_mem = NULL; |
eff04652 TM |
2802 | WPACKET wpkt; |
2803 | size_t l; | |
2804 | ||
5f86ae32 | 2805 | ossl_quic_srtm_remove(ch->srtm, ch, seq_num); |
cdd91631 | 2806 | |
eff04652 | 2807 | if ((buf_mem = BUF_MEM_new()) == NULL) |
96014840 | 2808 | goto err; |
eff04652 TM |
2809 | |
2810 | if (!WPACKET_init(&wpkt, buf_mem)) | |
2811 | goto err; | |
2812 | ||
2813 | if (!ossl_quic_wire_encode_frame_retire_conn_id(&wpkt, seq_num)) { | |
2814 | WPACKET_cleanup(&wpkt); | |
2815 | goto err; | |
2816 | } | |
2817 | ||
2818 | WPACKET_finish(&wpkt); | |
2819 | if (!WPACKET_get_total_written(&wpkt, &l)) | |
2820 | goto err; | |
2821 | ||
2822 | if (ossl_quic_cfq_add_frame(ch->cfq, 1, QUIC_PN_SPACE_APP, | |
371c2958 | 2823 | OSSL_QUIC_FRAME_TYPE_RETIRE_CONN_ID, 0, |
eff04652 TM |
2824 | (unsigned char *)buf_mem->data, l, |
2825 | free_frame_data, NULL) == NULL) | |
2826 | goto err; | |
2827 | ||
2828 | buf_mem->data = NULL; | |
2829 | BUF_MEM_free(buf_mem); | |
2830 | return 1; | |
2831 | ||
2832 | err: | |
2833 | ossl_quic_channel_raise_protocol_error(ch, | |
2834 | QUIC_ERR_INTERNAL_ERROR, | |
2835 | OSSL_QUIC_FRAME_TYPE_NEW_CONN_ID, | |
2836 | "internal error enqueueing retire conn id"); | |
2837 | BUF_MEM_free(buf_mem); | |
2838 | return 0; | |
2839 | } | |
2840 | ||
2841 | void ossl_quic_channel_on_new_conn_id(QUIC_CHANNEL *ch, | |
2842 | OSSL_QUIC_FRAME_NEW_CONN_ID *f) | |
2843 | { | |
2844 | uint64_t new_remote_seq_num = ch->cur_remote_seq_num; | |
2845 | uint64_t new_retire_prior_to = ch->cur_retire_prior_to; | |
2846 | ||
2847 | if (!ossl_quic_channel_is_active(ch)) | |
2848 | return; | |
2849 | ||
2850 | /* We allow only two active connection ids; first check some constraints */ | |
eff04652 TM |
2851 | if (ch->cur_remote_dcid.id_len == 0) { |
2852 | /* Changing from 0 length connection id is disallowed */ | |
2853 | ossl_quic_channel_raise_protocol_error(ch, | |
2854 | QUIC_ERR_PROTOCOL_VIOLATION, | |
2855 | OSSL_QUIC_FRAME_TYPE_NEW_CONN_ID, | |
2856 | "zero length connection id in use"); | |
2857 | ||
2858 | return; | |
2859 | } | |
2860 | ||
2861 | if (f->seq_num > new_remote_seq_num) | |
2862 | new_remote_seq_num = f->seq_num; | |
2863 | if (f->retire_prior_to > new_retire_prior_to) | |
2864 | new_retire_prior_to = f->retire_prior_to; | |
2865 | ||
985429f4 P |
2866 | /* |
2867 | * RFC 9000-5.1.1: An endpoint MUST NOT provide more connection IDs | |
2868 | * than the peer's limit. | |
2869 | * | |
2870 | * After processing a NEW_CONNECTION_ID frame and adding and retiring | |
2871 | * active connection IDs, if the number of active connection IDs exceeds | |
2872 | * the value advertised in its active_connection_id_limit transport | |
2873 | * parameter, an endpoint MUST close the connection with an error of | |
2874 | * type CONNECTION_ID_LIMIT_ERROR. | |
2875 | */ | |
2876 | if (new_remote_seq_num - new_retire_prior_to > 1) { | |
eff04652 TM |
2877 | ossl_quic_channel_raise_protocol_error(ch, |
2878 | QUIC_ERR_CONNECTION_ID_LIMIT_ERROR, | |
2879 | OSSL_QUIC_FRAME_TYPE_NEW_CONN_ID, | |
2880 | "active_connection_id limit violated"); | |
985429f4 P |
2881 | return; |
2882 | } | |
2883 | ||
2884 | /* | |
2885 | * RFC 9000-5.1.1: An endpoint MAY send connection IDs that temporarily | |
2886 | * exceed a peer's limit if the NEW_CONNECTION_ID frame also requires | |
2887 | * the retirement of any excess, by including a sufficiently large | |
2888 | * value in the Retire Prior To field. | |
2889 | * | |
2890 | * RFC 9000-5.1.2: An endpoint SHOULD allow for sending and tracking | |
2891 | * a number of RETIRE_CONNECTION_ID frames of at least twice the value | |
2892 | * of the active_connection_id_limit transport parameter. An endpoint | |
2893 | * MUST NOT forget a connection ID without retiring it, though it MAY | |
2894 | * choose to treat having connection IDs in need of retirement that | |
2895 | * exceed this limit as a connection error of type CONNECTION_ID_LIMIT_ERROR. | |
2896 | * | |
2897 | * We are a little bit more liberal than the minimum mandated. | |
2898 | */ | |
2899 | if (new_retire_prior_to - ch->cur_retire_prior_to > 10) { | |
2900 | ossl_quic_channel_raise_protocol_error(ch, | |
2901 | QUIC_ERR_CONNECTION_ID_LIMIT_ERROR, | |
2902 | OSSL_QUIC_FRAME_TYPE_NEW_CONN_ID, | |
2903 | "retiring connection id limit violated"); | |
eff04652 TM |
2904 | |
2905 | return; | |
2906 | } | |
2907 | ||
2908 | if (new_remote_seq_num > ch->cur_remote_seq_num) { | |
cdd91631 | 2909 | /* Add new stateless reset token */ |
5f86ae32 HL |
2910 | if (!ossl_quic_srtm_add(ch->srtm, ch, new_remote_seq_num, |
2911 | &f->stateless_reset)) { | |
cdd91631 P |
2912 | ossl_quic_channel_raise_protocol_error( |
2913 | ch, QUIC_ERR_CONNECTION_ID_LIMIT_ERROR, | |
2914 | OSSL_QUIC_FRAME_TYPE_NEW_CONN_ID, | |
2915 | "unable to store stateless reset token"); | |
2916 | ||
2917 | return; | |
2918 | } | |
eff04652 TM |
2919 | ch->cur_remote_seq_num = new_remote_seq_num; |
2920 | ch->cur_remote_dcid = f->conn_id; | |
2921 | ossl_quic_tx_packetiser_set_cur_dcid(ch->txp, &ch->cur_remote_dcid); | |
2922 | } | |
5cc73695 | 2923 | |
985429f4 P |
2924 | /* |
2925 | * RFC 9000-5.1.2: Upon receipt of an increased Retire Prior To | |
2926 | * field, the peer MUST stop using the corresponding connection IDs | |
2927 | * and retire them with RETIRE_CONNECTION_ID frames before adding the | |
2928 | * newly provided connection ID to the set of active connection IDs. | |
2929 | */ | |
5cc73695 HL |
2930 | |
2931 | /* | |
2932 | * Note: RFC 9000 s. 19.15 says: | |
2933 | * "An endpoint that receives a NEW_CONNECTION_ID frame with a sequence | |
2934 | * number smaller than the Retire Prior To field of a previously received | |
7c793cd3 | 2935 | * NEW_CONNECTION_ID frame MUST send a corresponding |
5cc73695 HL |
2936 | * RETIRE_CONNECTION_ID frame that retires the newly received connection |
2937 | * ID, unless it has already done so for that sequence number." | |
2938 | * | |
2939 | * Since we currently always queue RETIRE_CONN_ID frames based on the Retire | |
2940 | * Prior To field of a NEW_CONNECTION_ID frame immediately upon receiving | |
2941 | * that NEW_CONNECTION_ID frame, by definition this will always be met. | |
2942 | * This may change in future when we change our CID handling. | |
2943 | */ | |
eff04652 TM |
2944 | while (new_retire_prior_to > ch->cur_retire_prior_to) { |
2945 | if (!ch_enqueue_retire_conn_id(ch, ch->cur_retire_prior_to)) | |
2946 | break; | |
2947 | ++ch->cur_retire_prior_to; | |
2948 | } | |
2949 | } | |
2950 | ||
9c3ea4e1 TM |
2951 | static void ch_save_err_state(QUIC_CHANNEL *ch) |
2952 | { | |
2953 | if (ch->err_state == NULL) | |
2954 | ch->err_state = OSSL_ERR_STATE_new(); | |
2955 | ||
2956 | if (ch->err_state == NULL) | |
2957 | return; | |
2958 | ||
2959 | OSSL_ERR_STATE_save(ch->err_state); | |
2960 | } | |
2961 | ||
0df89732 HL |
2962 | void ossl_quic_channel_inject(QUIC_CHANNEL *ch, QUIC_URXE *e) |
2963 | { | |
2964 | ossl_qrx_inject_urxe(ch->qrx, e); | |
2965 | } | |
2966 | ||
61076198 | 2967 | void ossl_quic_channel_on_stateless_reset(QUIC_CHANNEL *ch) |
cdd91631 P |
2968 | { |
2969 | QUIC_TERMINATE_CAUSE tcause = {0}; | |
2970 | ||
61076198 HL |
2971 | tcause.error_code = QUIC_ERR_NO_ERROR; |
2972 | tcause.remote = 1; | |
2973 | ch_start_terminating(ch, &tcause, 0); | |
cdd91631 P |
2974 | } |
2975 | ||
632b0c7e | 2976 | void ossl_quic_channel_raise_net_error(QUIC_CHANNEL *ch) |
df15e990 HL |
2977 | { |
2978 | QUIC_TERMINATE_CAUSE tcause = {0}; | |
2979 | ||
4df4add2 HL |
2980 | if (ch->net_error) |
2981 | return; | |
741170be | 2982 | |
4df4add2 | 2983 | ch->net_error = 1; |
5c3474ea | 2984 | |
df15e990 | 2985 | tcause.error_code = QUIC_ERR_INTERNAL_ERROR; |
4df4add2 HL |
2986 | tcause.reason = "network BIO I/O error"; |
2987 | tcause.reason_len = strlen(tcause.reason); | |
df15e990 HL |
2988 | |
2989 | /* | |
2990 | * Skip Terminating state and go directly to Terminated, no point trying to | |
2991 | * send CONNECTION_CLOSE if we cannot communicate. | |
2992 | */ | |
2993 | ch_start_terminating(ch, &tcause, 1); | |
f538b421 HL |
2994 | } |
2995 | ||
5c3474ea TM |
2996 | int ossl_quic_channel_net_error(QUIC_CHANNEL *ch) |
2997 | { | |
2998 | return ch->net_error; | |
2999 | } | |
3000 | ||
9c3ea4e1 TM |
3001 | void ossl_quic_channel_restore_err_state(QUIC_CHANNEL *ch) |
3002 | { | |
3003 | if (ch == NULL) | |
3004 | return; | |
3005 | ||
4df4add2 HL |
3006 | if (!ossl_quic_port_is_running(ch->port)) |
3007 | ossl_quic_port_restore_err_state(ch->port); | |
3008 | else | |
3009 | OSSL_ERR_STATE_restore(ch->err_state); | |
9c3ea4e1 TM |
3010 | } |
3011 | ||
741170be HL |
3012 | void ossl_quic_channel_raise_protocol_error_loc(QUIC_CHANNEL *ch, |
3013 | uint64_t error_code, | |
3014 | uint64_t frame_type, | |
3015 | const char *reason, | |
7a2bb210 | 3016 | ERR_STATE *err_state, |
741170be HL |
3017 | const char *src_file, |
3018 | int src_line, | |
3019 | const char *src_func) | |
f538b421 HL |
3020 | { |
3021 | QUIC_TERMINATE_CAUSE tcause = {0}; | |
2b8126d8 TM |
3022 | int err_reason = error_code == QUIC_ERR_INTERNAL_ERROR |
3023 | ? ERR_R_INTERNAL_ERROR : SSL_R_QUIC_PROTOCOL_ERROR; | |
741170be HL |
3024 | const char *err_str = ossl_quic_err_to_string(error_code); |
3025 | const char *err_str_pfx = " (", *err_str_sfx = ")"; | |
3026 | const char *ft_str = NULL; | |
3027 | const char *ft_str_pfx = " (", *ft_str_sfx = ")"; | |
3028 | ||
549d0a70 HL |
3029 | if (ch->protocol_error) |
3030 | /* Only the first call to this function matters. */ | |
3031 | return; | |
3032 | ||
741170be HL |
3033 | if (err_str == NULL) { |
3034 | err_str = ""; | |
3035 | err_str_pfx = ""; | |
3036 | err_str_sfx = ""; | |
3037 | } | |
3038 | ||
7a2bb210 HL |
3039 | /* |
3040 | * If we were provided an underlying error state, restore it and then append | |
3041 | * our ERR on top as a "cover letter" error. | |
3042 | */ | |
3043 | if (err_state != NULL) | |
3044 | OSSL_ERR_STATE_restore(err_state); | |
3045 | ||
741170be HL |
3046 | if (frame_type != 0) { |
3047 | ft_str = ossl_quic_frame_type_to_string(frame_type); | |
3048 | if (ft_str == NULL) { | |
3049 | ft_str = ""; | |
3050 | ft_str_pfx = ""; | |
3051 | ft_str_sfx = ""; | |
3052 | } | |
3053 | ||
3054 | ERR_raise_data(ERR_LIB_SSL, err_reason, | |
3055 | "QUIC error code: 0x%llx%s%s%s " | |
3056 | "(triggered by frame type: 0x%llx%s%s%s), reason: \"%s\"", | |
3057 | (unsigned long long) error_code, | |
3058 | err_str_pfx, err_str, err_str_sfx, | |
3059 | (unsigned long long) frame_type, | |
3060 | ft_str_pfx, ft_str, ft_str_sfx, | |
3061 | reason); | |
3062 | } else { | |
3063 | ERR_raise_data(ERR_LIB_SSL, err_reason, | |
3064 | "QUIC error code: 0x%llx%s%s%s, reason: \"%s\"", | |
3065 | (unsigned long long) error_code, | |
3066 | err_str_pfx, err_str, err_str_sfx, | |
3067 | reason); | |
3068 | } | |
3069 | ||
3070 | if (src_file != NULL) | |
3071 | ERR_set_debug(src_file, src_line, src_func); | |
f538b421 | 3072 | |
2b8126d8 | 3073 | ch_save_err_state(ch); |
9c3ea4e1 | 3074 | |
f538b421 HL |
3075 | tcause.error_code = error_code; |
3076 | tcause.frame_type = frame_type; | |
40c8c756 | 3077 | tcause.reason = reason; |
f2609004 | 3078 | tcause.reason_len = strlen(reason); |
f538b421 | 3079 | |
549d0a70 | 3080 | ch->protocol_error = 1; |
df15e990 | 3081 | ch_start_terminating(ch, &tcause, 0); |
f538b421 HL |
3082 | } |
3083 | ||
3084 | /* | |
3085 | * Called once the terminating timer expires, meaning we move from TERMINATING | |
3086 | * to TERMINATED. | |
3087 | */ | |
3088 | static void ch_on_terminating_timeout(QUIC_CHANNEL *ch) | |
3089 | { | |
3090 | ch->state = QUIC_CHANNEL_STATE_TERMINATED; | |
3091 | } | |
3092 | ||
758e9b53 HL |
3093 | /* |
3094 | * Determines the effective idle timeout duration. This is based on the idle | |
3095 | * timeout values that we and our peer signalled in transport parameters | |
3096 | * but have some limits applied. | |
3097 | */ | |
3098 | static OSSL_TIME ch_get_effective_idle_timeout_duration(QUIC_CHANNEL *ch) | |
3099 | { | |
3100 | OSSL_TIME pto; | |
3101 | ||
3102 | if (ch->max_idle_timeout == 0) | |
3103 | return ossl_time_infinite(); | |
3104 | ||
3105 | /* | |
3106 | * RFC 9000 s. 10.1: Idle Timeout | |
3107 | * To avoid excessively small idle timeout periods, endpoints | |
3108 | * MUST increase the idle timeout period to be at least three | |
3109 | * times the current Probe Timeout (PTO). This allows for | |
3110 | * multiple PTOs to expire, and therefore multiple probes to | |
3111 | * be sent and lost, prior to idle timeout. | |
3112 | */ | |
3113 | pto = ossl_ackm_get_pto_duration(ch->ackm); | |
3114 | return ossl_time_max(ossl_ms2time(ch->max_idle_timeout), | |
3115 | ossl_time_multiply(pto, 3)); | |
3116 | } | |
3117 | ||
f538b421 HL |
3118 | /* |
3119 | * Updates our idle deadline. Called when an event happens which should bump the | |
3120 | * idle timeout. | |
3121 | */ | |
3122 | static void ch_update_idle(QUIC_CHANNEL *ch) | |
3123 | { | |
758e9b53 HL |
3124 | ch->idle_deadline = ossl_time_add(get_time(ch), |
3125 | ch_get_effective_idle_timeout_duration(ch)); | |
f538b421 HL |
3126 | } |
3127 | ||
3b1ab5a3 HL |
3128 | /* |
3129 | * Updates our ping deadline, which determines when we next generate a ping if | |
3130 | * we don't have any other ACK-eliciting frames to send. | |
3131 | */ | |
3132 | static void ch_update_ping_deadline(QUIC_CHANNEL *ch) | |
3133 | { | |
758e9b53 | 3134 | OSSL_TIME max_span, idle_duration; |
3b1ab5a3 | 3135 | |
758e9b53 HL |
3136 | idle_duration = ch_get_effective_idle_timeout_duration(ch); |
3137 | if (ossl_time_is_infinite(idle_duration)) { | |
3b1ab5a3 | 3138 | ch->ping_deadline = ossl_time_infinite(); |
758e9b53 | 3139 | return; |
3b1ab5a3 | 3140 | } |
758e9b53 HL |
3141 | |
3142 | /* | |
3143 | * Maximum amount of time without traffic before we send a PING to keep | |
3144 | * the connection open. Usually we use max_idle_timeout/2, but ensure | |
3145 | * the period never exceeds the assumed NAT interval to ensure NAT | |
3146 | * devices don't have their state time out (RFC 9000 s. 10.1.2). | |
3147 | */ | |
3148 | max_span = ossl_time_divide(idle_duration, 2); | |
3149 | max_span = ossl_time_min(max_span, MAX_NAT_INTERVAL); | |
3150 | ch->ping_deadline = ossl_time_add(get_time(ch), max_span); | |
3b1ab5a3 HL |
3151 | } |
3152 | ||
f538b421 HL |
3153 | /* Called when the idle timeout expires. */ |
3154 | static void ch_on_idle_timeout(QUIC_CHANNEL *ch) | |
3155 | { | |
3156 | /* | |
3157 | * Idle timeout does not have an error code associated with it because a | |
3158 | * CONN_CLOSE is never sent for it. We shouldn't use this data once we reach | |
3159 | * TERMINATED anyway. | |
3160 | */ | |
3161 | ch->terminate_cause.app = 0; | |
3162 | ch->terminate_cause.error_code = UINT64_MAX; | |
3163 | ch->terminate_cause.frame_type = 0; | |
3164 | ||
3165 | ch->state = QUIC_CHANNEL_STATE_TERMINATED; | |
3166 | } | |
b1b06da2 HL |
3167 | |
3168 | /* Called when we, as a server, get a new incoming connection. */ | |
4ed6b48d HL |
3169 | int ossl_quic_channel_on_new_conn(QUIC_CHANNEL *ch, const BIO_ADDR *peer, |
3170 | const QUIC_CONN_ID *peer_scid, | |
3171 | const QUIC_CONN_ID *peer_dcid) | |
b1b06da2 HL |
3172 | { |
3173 | if (!ossl_assert(ch->state == QUIC_CHANNEL_STATE_IDLE && ch->is_server)) | |
3174 | return 0; | |
3175 | ||
52dfe6f1 HL |
3176 | /* Generate an Initial LCID we will use for the connection. */ |
3177 | if (!ossl_quic_lcidm_generate_initial(ch->lcidm, ch, &ch->cur_local_cid)) | |
b1b06da2 HL |
3178 | return 0; |
3179 | ||
3180 | /* Note our newly learnt peer address and CIDs. */ | |
3181 | ch->cur_peer_addr = *peer; | |
3182 | ch->init_dcid = *peer_dcid; | |
3183 | ch->cur_remote_dcid = *peer_scid; | |
3184 | ||
3185 | /* Inform QTX of peer address. */ | |
3186 | if (!ossl_quic_tx_packetiser_set_peer(ch->txp, &ch->cur_peer_addr)) | |
3187 | return 0; | |
3188 | ||
3189 | /* Inform TXP of desired CIDs. */ | |
3190 | if (!ossl_quic_tx_packetiser_set_cur_dcid(ch->txp, &ch->cur_remote_dcid)) | |
3191 | return 0; | |
3192 | ||
bbc97540 | 3193 | if (!ossl_quic_tx_packetiser_set_cur_scid(ch->txp, &ch->cur_local_cid)) |
b1b06da2 HL |
3194 | return 0; |
3195 | ||
3196 | /* Plug in secrets for the Initial EL. */ | |
22739cc3 HL |
3197 | if (!ossl_quic_provide_initial_secret(ch->port->engine->libctx, |
3198 | ch->port->engine->propq, | |
b1b06da2 HL |
3199 | &ch->init_dcid, |
3200 | /*is_server=*/1, | |
3201 | ch->qrx, ch->qtx)) | |
3202 | return 0; | |
3203 | ||
52dfe6f1 HL |
3204 | /* Register the peer ODCID in the LCIDM. */ |
3205 | if (!ossl_quic_lcidm_enrol_odcid(ch->lcidm, ch, &ch->init_dcid)) | |
b1b06da2 HL |
3206 | return 0; |
3207 | ||
3208 | /* Change state. */ | |
3209 | ch->state = QUIC_CHANNEL_STATE_ACTIVE; | |
3210 | ch->doing_proactive_ver_neg = 0; /* not currently supported */ | |
3211 | return 1; | |
3212 | } | |
d03fe5de MC |
3213 | |
3214 | SSL *ossl_quic_channel_get0_ssl(QUIC_CHANNEL *ch) | |
3215 | { | |
3216 | return ch->tls; | |
3217 | } | |
2dbc39de | 3218 | |
e8fe7a21 HL |
3219 | static int ch_init_new_stream(QUIC_CHANNEL *ch, QUIC_STREAM *qs, |
3220 | int can_send, int can_recv) | |
3221 | { | |
3222 | uint64_t rxfc_wnd; | |
3223 | int server_init = ossl_quic_stream_is_server_init(qs); | |
3224 | int local_init = (ch->is_server == server_init); | |
3225 | int is_uni = !ossl_quic_stream_is_bidi(qs); | |
3226 | ||
db2f98c4 | 3227 | if (can_send) |
6ba2edb7 TM |
3228 | if ((qs->sstream = ossl_quic_sstream_new(INIT_APP_BUF_LEN)) == NULL) |
3229 | goto err; | |
e8fe7a21 | 3230 | |
db2f98c4 | 3231 | if (can_recv) |
a02571a0 TM |
3232 | if ((qs->rstream = ossl_quic_rstream_new(NULL, NULL, 0)) == NULL) |
3233 | goto err; | |
e8fe7a21 HL |
3234 | |
3235 | /* TXFC */ | |
3236 | if (!ossl_quic_txfc_init(&qs->txfc, &ch->conn_txfc)) | |
3237 | goto err; | |
3238 | ||
3239 | if (ch->got_remote_transport_params) { | |
3240 | /* | |
3241 | * If we already got peer TPs we need to apply the initial CWM credit | |
3242 | * now. If we didn't already get peer TPs this will be done | |
3243 | * automatically for all extant streams when we do. | |
3244 | */ | |
3245 | if (can_send) { | |
3246 | uint64_t cwm; | |
3247 | ||
3248 | if (is_uni) | |
3249 | cwm = ch->rx_init_max_stream_data_uni; | |
3250 | else if (local_init) | |
3251 | cwm = ch->rx_init_max_stream_data_bidi_local; | |
3252 | else | |
3253 | cwm = ch->rx_init_max_stream_data_bidi_remote; | |
3254 | ||
3255 | ossl_quic_txfc_bump_cwm(&qs->txfc, cwm); | |
3256 | } | |
3257 | } | |
3258 | ||
3259 | /* RXFC */ | |
3260 | if (!can_recv) | |
3261 | rxfc_wnd = 0; | |
3262 | else if (is_uni) | |
3263 | rxfc_wnd = ch->tx_init_max_stream_data_uni; | |
3264 | else if (local_init) | |
3265 | rxfc_wnd = ch->tx_init_max_stream_data_bidi_local; | |
3266 | else | |
3267 | rxfc_wnd = ch->tx_init_max_stream_data_bidi_remote; | |
3268 | ||
3269 | if (!ossl_quic_rxfc_init(&qs->rxfc, &ch->conn_rxfc, | |
3270 | rxfc_wnd, | |
3271 | DEFAULT_STREAM_RXFC_MAX_WND_MUL * rxfc_wnd, | |
3272 | get_time, ch)) | |
3273 | goto err; | |
3274 | ||
3275 | return 1; | |
3276 | ||
3277 | err: | |
3278 | ossl_quic_sstream_free(qs->sstream); | |
3279 | qs->sstream = NULL; | |
3280 | ossl_quic_rstream_free(qs->rstream); | |
3281 | qs->rstream = NULL; | |
3282 | return 0; | |
3283 | } | |
3284 | ||
9d6bd3d3 HL |
3285 | static uint64_t *ch_get_local_stream_next_ordinal_ptr(QUIC_CHANNEL *ch, |
3286 | int is_uni) | |
3287 | { | |
3288 | return is_uni ? &ch->next_local_stream_ordinal_uni | |
3289 | : &ch->next_local_stream_ordinal_bidi; | |
3290 | } | |
3291 | ||
3292 | int ossl_quic_channel_is_new_local_stream_admissible(QUIC_CHANNEL *ch, | |
3293 | int is_uni) | |
3294 | { | |
3295 | uint64_t *p_next_ordinal = ch_get_local_stream_next_ordinal_ptr(ch, is_uni); | |
3296 | ||
3297 | return ossl_quic_stream_map_is_local_allowed_by_stream_limit(&ch->qsm, | |
3298 | *p_next_ordinal, | |
3299 | is_uni); | |
3300 | } | |
3301 | ||
f20fdd16 | 3302 | QUIC_STREAM *ossl_quic_channel_new_stream_local(QUIC_CHANNEL *ch, int is_uni) |
2dbc39de HL |
3303 | { |
3304 | QUIC_STREAM *qs; | |
22b1a96f | 3305 | int type; |
2dbc39de HL |
3306 | uint64_t stream_id, *p_next_ordinal; |
3307 | ||
22b1a96f HL |
3308 | type = ch->is_server ? QUIC_STREAM_INITIATOR_SERVER |
3309 | : QUIC_STREAM_INITIATOR_CLIENT; | |
2dbc39de | 3310 | |
9d6bd3d3 HL |
3311 | p_next_ordinal = ch_get_local_stream_next_ordinal_ptr(ch, is_uni); |
3312 | ||
3313 | if (is_uni) | |
2dbc39de | 3314 | type |= QUIC_STREAM_DIR_UNI; |
9d6bd3d3 | 3315 | else |
2dbc39de | 3316 | type |= QUIC_STREAM_DIR_BIDI; |
2dbc39de HL |
3317 | |
3318 | if (*p_next_ordinal >= ((uint64_t)1) << 62) | |
3319 | return NULL; | |
3320 | ||
3321 | stream_id = ((*p_next_ordinal) << 2) | type; | |
3322 | ||
3323 | if ((qs = ossl_quic_stream_map_alloc(&ch->qsm, stream_id, type)) == NULL) | |
3324 | return NULL; | |
3325 | ||
e8fe7a21 HL |
3326 | /* Locally-initiated stream, so we always want a send buffer. */ |
3327 | if (!ch_init_new_stream(ch, qs, /*can_send=*/1, /*can_recv=*/!is_uni)) | |
3328 | goto err; | |
3329 | ||
2dbc39de HL |
3330 | ++*p_next_ordinal; |
3331 | return qs; | |
e8fe7a21 HL |
3332 | |
3333 | err: | |
3334 | ossl_quic_stream_map_release(&ch->qsm, qs); | |
3335 | return NULL; | |
2dbc39de | 3336 | } |
f20fdd16 HL |
3337 | |
3338 | QUIC_STREAM *ossl_quic_channel_new_stream_remote(QUIC_CHANNEL *ch, | |
3339 | uint64_t stream_id) | |
3340 | { | |
3341 | uint64_t peer_role; | |
e8fe7a21 | 3342 | int is_uni; |
f20fdd16 HL |
3343 | QUIC_STREAM *qs; |
3344 | ||
3345 | peer_role = ch->is_server | |
3346 | ? QUIC_STREAM_INITIATOR_CLIENT | |
3347 | : QUIC_STREAM_INITIATOR_SERVER; | |
3348 | ||
3349 | if ((stream_id & QUIC_STREAM_INITIATOR_MASK) != peer_role) | |
3350 | return NULL; | |
3351 | ||
e8fe7a21 HL |
3352 | is_uni = ((stream_id & QUIC_STREAM_DIR_MASK) == QUIC_STREAM_DIR_UNI); |
3353 | ||
f20fdd16 HL |
3354 | qs = ossl_quic_stream_map_alloc(&ch->qsm, stream_id, |
3355 | stream_id & (QUIC_STREAM_INITIATOR_MASK | |
3356 | | QUIC_STREAM_DIR_MASK)); | |
3357 | if (qs == NULL) | |
3358 | return NULL; | |
3359 | ||
e8fe7a21 HL |
3360 | if (!ch_init_new_stream(ch, qs, /*can_send=*/!is_uni, /*can_recv=*/1)) |
3361 | goto err; | |
3362 | ||
995ff282 HL |
3363 | if (ch->incoming_stream_auto_reject) |
3364 | ossl_quic_channel_reject_stream(ch, qs); | |
3365 | else | |
3366 | ossl_quic_stream_map_push_accept_queue(&ch->qsm, qs); | |
3367 | ||
f20fdd16 | 3368 | return qs; |
e8fe7a21 HL |
3369 | |
3370 | err: | |
3371 | ossl_quic_stream_map_release(&ch->qsm, qs); | |
3372 | return NULL; | |
f20fdd16 | 3373 | } |
995ff282 HL |
3374 | |
3375 | void ossl_quic_channel_set_incoming_stream_auto_reject(QUIC_CHANNEL *ch, | |
3376 | int enable, | |
3377 | uint64_t aec) | |
3378 | { | |
3379 | ch->incoming_stream_auto_reject = (enable != 0); | |
3380 | ch->incoming_stream_auto_reject_aec = aec; | |
3381 | } | |
3382 | ||
3383 | void ossl_quic_channel_reject_stream(QUIC_CHANNEL *ch, QUIC_STREAM *qs) | |
3384 | { | |
e8b9f632 HL |
3385 | ossl_quic_stream_map_stop_sending_recv_part(&ch->qsm, qs, |
3386 | ch->incoming_stream_auto_reject_aec); | |
995ff282 | 3387 | |
e8b9f632 HL |
3388 | ossl_quic_stream_map_reset_stream_send_part(&ch->qsm, qs, |
3389 | ch->incoming_stream_auto_reject_aec); | |
995ff282 HL |
3390 | qs->deleted = 1; |
3391 | ||
3392 | ossl_quic_stream_map_update_state(&ch->qsm, qs); | |
3393 | } | |
bbc97540 TM |
3394 | |
3395 | /* Replace local connection ID in TXP and DEMUX for testing purposes. */ | |
3396 | int ossl_quic_channel_replace_local_cid(QUIC_CHANNEL *ch, | |
3397 | const QUIC_CONN_ID *conn_id) | |
3398 | { | |
52dfe6f1 HL |
3399 | /* Remove the current LCID from the LCIDM. */ |
3400 | if (!ossl_quic_lcidm_debug_remove(ch->lcidm, &ch->cur_local_cid)) | |
bbc97540 TM |
3401 | return 0; |
3402 | ch->cur_local_cid = *conn_id; | |
3403 | /* Set in the TXP, used only for long header packets. */ | |
3404 | if (!ossl_quic_tx_packetiser_set_cur_scid(ch->txp, &ch->cur_local_cid)) | |
3405 | return 0; | |
52dfe6f1 HL |
3406 | /* Add the new LCID to the LCIDM. */ |
3407 | if (!ossl_quic_lcidm_debug_add(ch->lcidm, ch, &ch->cur_local_cid, | |
3408 | 100)) | |
bbc97540 TM |
3409 | return 0; |
3410 | return 1; | |
3411 | } | |
5cf99b40 MC |
3412 | |
3413 | void ossl_quic_channel_set_msg_callback(QUIC_CHANNEL *ch, | |
3414 | ossl_msg_cb msg_callback, | |
c2786c8e | 3415 | SSL *msg_callback_ssl) |
5cf99b40 MC |
3416 | { |
3417 | ch->msg_callback = msg_callback; | |
c2786c8e MC |
3418 | ch->msg_callback_ssl = msg_callback_ssl; |
3419 | ossl_qtx_set_msg_callback(ch->qtx, msg_callback, msg_callback_ssl); | |
5cf99b40 | 3420 | ossl_quic_tx_packetiser_set_msg_callback(ch->txp, msg_callback, |
c2786c8e MC |
3421 | msg_callback_ssl); |
3422 | ossl_qrx_set_msg_callback(ch->qrx, msg_callback, msg_callback_ssl); | |
5cf99b40 MC |
3423 | } |
3424 | ||
3425 | void ossl_quic_channel_set_msg_callback_arg(QUIC_CHANNEL *ch, | |
3426 | void *msg_callback_arg) | |
3427 | { | |
3428 | ch->msg_callback_arg = msg_callback_arg; | |
3429 | ossl_qtx_set_msg_callback_arg(ch->qtx, msg_callback_arg); | |
3430 | ossl_quic_tx_packetiser_set_msg_callback_arg(ch->txp, msg_callback_arg); | |
3431 | ossl_qrx_set_msg_callback_arg(ch->qrx, msg_callback_arg); | |
3432 | } | |
16f3b542 HL |
3433 | |
3434 | void ossl_quic_channel_set_txku_threshold_override(QUIC_CHANNEL *ch, | |
3435 | uint64_t tx_pkt_threshold) | |
3436 | { | |
3437 | ch->txku_threshold_override = tx_pkt_threshold; | |
3438 | } | |
3439 | ||
3440 | uint64_t ossl_quic_channel_get_tx_key_epoch(QUIC_CHANNEL *ch) | |
3441 | { | |
3442 | return ossl_qtx_get_key_epoch(ch->qtx); | |
3443 | } | |
3444 | ||
3445 | uint64_t ossl_quic_channel_get_rx_key_epoch(QUIC_CHANNEL *ch) | |
3446 | { | |
3447 | return ossl_qrx_get_key_epoch(ch->qrx); | |
3448 | } | |
692a3cab HL |
3449 | |
3450 | int ossl_quic_channel_trigger_txku(QUIC_CHANNEL *ch) | |
3451 | { | |
3452 | if (!txku_allowed(ch)) | |
3453 | return 0; | |
3454 | ||
3455 | ch->ku_locally_initiated = 1; | |
3456 | ch_trigger_txku(ch); | |
3457 | return 1; | |
3458 | } | |
9ff3a99e HL |
3459 | |
3460 | int ossl_quic_channel_ping(QUIC_CHANNEL *ch) | |
3461 | { | |
3462 | int pn_space = ossl_quic_enc_level_to_pn_space(ch->tx_enc_level); | |
3463 | ||
3464 | ossl_quic_tx_packetiser_schedule_ack_eliciting(ch->txp, pn_space); | |
3465 | ||
3466 | return 1; | |
3467 | } | |
03b38595 | 3468 | |
17340e87 HL |
3469 | uint16_t ossl_quic_channel_get_diag_num_rx_ack(QUIC_CHANNEL *ch) |
3470 | { | |
3471 | return ch->diag_num_rx_ack; | |
3472 | } | |
ed75eb32 HL |
3473 | |
3474 | void ossl_quic_channel_get_diag_local_cid(QUIC_CHANNEL *ch, QUIC_CONN_ID *cid) | |
3475 | { | |
3476 | *cid = ch->cur_local_cid; | |
3477 | } |