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f538b421 HL |
1 | /* |
2 | * Copyright 2022 The OpenSSL Project Authors. All Rights Reserved. | |
3 | * | |
4 | * Licensed under the Apache License 2.0 (the "License"). You may not use | |
5 | * this file except in compliance with the License. You can obtain a copy | |
6 | * in the file LICENSE in the source distribution or at | |
7 | * https://www.openssl.org/source/license.html | |
8 | */ | |
9 | ||
10 | #include "internal/quic_channel.h" | |
11 | #include "internal/quic_error.h" | |
12 | #include "internal/quic_rx_depack.h" | |
13 | #include "../ssl_local.h" | |
14 | #include "quic_channel_local.h" | |
15 | #include <openssl/rand.h> | |
16 | ||
b1b06da2 HL |
17 | /* |
18 | * NOTE: While this channel implementation currently has basic server support, | |
19 | * this functionality has been implemented for internal testing purposes and is | |
20 | * not suitable for network use. In particular, it does not implement address | |
21 | * validation, anti-amplification or retry logic. | |
22 | * | |
23 | * TODO(QUIC): Implement address validation and anti-amplification | |
24 | * TODO(QUIC): Implement retry logic | |
25 | */ | |
26 | ||
f538b421 HL |
27 | #define INIT_DCID_LEN 8 |
28 | #define INIT_CRYPTO_BUF_LEN 8192 | |
29 | #define INIT_APP_BUF_LEN 8192 | |
30 | ||
9cf091a3 HL |
31 | /* |
32 | * Interval before we force a PING to ensure NATs don't timeout. This is based | |
0815b725 | 33 | * on the lowest commonly seen value of 30 seconds as cited in RFC 9000 s. |
9cf091a3 HL |
34 | * 10.1.2. |
35 | */ | |
36 | #define MAX_NAT_INTERVAL (ossl_ms2time(25000)) | |
37 | ||
3bf4dc8c | 38 | static void ch_rx_pre(QUIC_CHANNEL *ch); |
f538b421 HL |
39 | static int ch_rx(QUIC_CHANNEL *ch); |
40 | static int ch_tx(QUIC_CHANNEL *ch); | |
ccd31037 | 41 | static void ch_tick(QUIC_TICK_RESULT *res, void *arg, uint32_t flags); |
f538b421 HL |
42 | static void ch_rx_handle_packet(QUIC_CHANNEL *ch); |
43 | static OSSL_TIME ch_determine_next_tick_deadline(QUIC_CHANNEL *ch); | |
44 | static int ch_retry(QUIC_CHANNEL *ch, | |
45 | const unsigned char *retry_token, | |
46 | size_t retry_token_len, | |
47 | const QUIC_CONN_ID *retry_scid); | |
48 | static void ch_cleanup(QUIC_CHANNEL *ch); | |
49 | static int ch_generate_transport_params(QUIC_CHANNEL *ch); | |
50 | static int ch_on_transport_params(const unsigned char *params, | |
51 | size_t params_len, | |
52 | void *arg); | |
53 | static int ch_on_handshake_alert(void *arg, unsigned char alert_code); | |
54 | static int ch_on_handshake_complete(void *arg); | |
55 | static int ch_on_handshake_yield_secret(uint32_t enc_level, int direction, | |
56 | uint32_t suite_id, EVP_MD *md, | |
57 | const unsigned char *secret, | |
58 | size_t secret_len, | |
59 | void *arg); | |
7257188b MC |
60 | static int ch_on_crypto_recv_record(const unsigned char **buf, |
61 | size_t *bytes_read, void *arg); | |
62 | static int ch_on_crypto_release_record(size_t bytes_read, void *arg); | |
f538b421 HL |
63 | static int crypto_ensure_empty(QUIC_RSTREAM *rstream); |
64 | static int ch_on_crypto_send(const unsigned char *buf, size_t buf_len, | |
65 | size_t *consumed, void *arg); | |
66 | static OSSL_TIME get_time(void *arg); | |
67 | static uint64_t get_stream_limit(int uni, void *arg); | |
68 | static int rx_early_validate(QUIC_PN pn, int pn_space, void *arg); | |
8a65e7a5 | 69 | static void rxku_detected(QUIC_PN pn, void *arg); |
f538b421 HL |
70 | static int ch_retry(QUIC_CHANNEL *ch, |
71 | const unsigned char *retry_token, | |
72 | size_t retry_token_len, | |
73 | const QUIC_CONN_ID *retry_scid); | |
74 | static void ch_update_idle(QUIC_CHANNEL *ch); | |
75 | static int ch_discard_el(QUIC_CHANNEL *ch, | |
76 | uint32_t enc_level); | |
77 | static void ch_on_idle_timeout(QUIC_CHANNEL *ch); | |
78 | static void ch_update_idle(QUIC_CHANNEL *ch); | |
3b1ab5a3 | 79 | static void ch_update_ping_deadline(QUIC_CHANNEL *ch); |
df15e990 | 80 | static void ch_raise_net_error(QUIC_CHANNEL *ch); |
f538b421 HL |
81 | static void ch_on_terminating_timeout(QUIC_CHANNEL *ch); |
82 | static void ch_start_terminating(QUIC_CHANNEL *ch, | |
df15e990 HL |
83 | const QUIC_TERMINATE_CAUSE *tcause, |
84 | int force_immediate); | |
b1b06da2 HL |
85 | static void ch_default_packet_handler(QUIC_URXE *e, void *arg); |
86 | static int ch_server_on_new_conn(QUIC_CHANNEL *ch, const BIO_ADDR *peer, | |
87 | const QUIC_CONN_ID *peer_scid, | |
88 | const QUIC_CONN_ID *peer_dcid); | |
8a65e7a5 HL |
89 | static void ch_on_txp_ack_tx(const OSSL_QUIC_FRAME_ACK *ack, uint32_t pn_space, |
90 | void *arg); | |
f538b421 HL |
91 | |
92 | static int gen_rand_conn_id(OSSL_LIB_CTX *libctx, size_t len, QUIC_CONN_ID *cid) | |
93 | { | |
94 | if (len > QUIC_MAX_CONN_ID_LEN) | |
95 | return 0; | |
96 | ||
97 | cid->id_len = (unsigned char)len; | |
98 | ||
99 | if (RAND_bytes_ex(libctx, cid->id, len, len * 8) != 1) { | |
100 | cid->id_len = 0; | |
101 | return 0; | |
102 | } | |
103 | ||
104 | return 1; | |
105 | } | |
106 | ||
107 | /* | |
108 | * QUIC Channel Initialization and Teardown | |
109 | * ======================================== | |
110 | */ | |
e8fe7a21 HL |
111 | #define DEFAULT_INIT_CONN_RXFC_WND (2 * 1024 * 1024) |
112 | #define DEFAULT_CONN_RXFC_MAX_WND_MUL 5 | |
0815b725 | 113 | |
e8fe7a21 HL |
114 | #define DEFAULT_INIT_STREAM_RXFC_WND (2 * 1024 * 1024) |
115 | #define DEFAULT_STREAM_RXFC_MAX_WND_MUL 5 | |
0815b725 | 116 | |
a6b6ea17 HL |
117 | #define DEFAULT_INIT_CONN_MAX_STREAMS 100 |
118 | ||
f538b421 HL |
119 | static int ch_init(QUIC_CHANNEL *ch) |
120 | { | |
121 | OSSL_QUIC_TX_PACKETISER_ARGS txp_args = {0}; | |
122 | OSSL_QTX_ARGS qtx_args = {0}; | |
123 | OSSL_QRX_ARGS qrx_args = {0}; | |
2723d705 | 124 | QUIC_TLS_ARGS tls_args = {0}; |
f538b421 | 125 | uint32_t pn_space; |
b1b06da2 | 126 | size_t rx_short_cid_len = ch->is_server ? INIT_DCID_LEN : 0; |
f538b421 | 127 | |
b1b06da2 HL |
128 | /* For clients, generate our initial DCID. */ |
129 | if (!ch->is_server | |
130 | && !gen_rand_conn_id(ch->libctx, INIT_DCID_LEN, &ch->init_dcid)) | |
f538b421 HL |
131 | goto err; |
132 | ||
133 | /* We plug in a network write BIO to the QTX later when we get one. */ | |
c2212dc1 | 134 | qtx_args.libctx = ch->libctx; |
f538b421 HL |
135 | qtx_args.mdpl = QUIC_MIN_INITIAL_DGRAM_LEN; |
136 | ch->rx_max_udp_payload_size = qtx_args.mdpl; | |
137 | ||
27195689 MC |
138 | ch->ping_deadline = ossl_time_infinite(); |
139 | ||
f538b421 HL |
140 | ch->qtx = ossl_qtx_new(&qtx_args); |
141 | if (ch->qtx == NULL) | |
142 | goto err; | |
143 | ||
144 | ch->txpim = ossl_quic_txpim_new(); | |
145 | if (ch->txpim == NULL) | |
146 | goto err; | |
147 | ||
148 | ch->cfq = ossl_quic_cfq_new(); | |
149 | if (ch->cfq == NULL) | |
150 | goto err; | |
151 | ||
152 | if (!ossl_quic_txfc_init(&ch->conn_txfc, NULL)) | |
153 | goto err; | |
154 | ||
0815b725 HL |
155 | /* |
156 | * Note: The TP we transmit governs what the peer can transmit and thus | |
157 | * applies to the RXFC. | |
158 | */ | |
159 | ch->tx_init_max_stream_data_bidi_local = DEFAULT_INIT_STREAM_RXFC_WND; | |
160 | ch->tx_init_max_stream_data_bidi_remote = DEFAULT_INIT_STREAM_RXFC_WND; | |
161 | ch->tx_init_max_stream_data_uni = DEFAULT_INIT_STREAM_RXFC_WND; | |
162 | ||
f538b421 | 163 | if (!ossl_quic_rxfc_init(&ch->conn_rxfc, NULL, |
0815b725 | 164 | DEFAULT_INIT_CONN_RXFC_WND, |
e8fe7a21 HL |
165 | DEFAULT_CONN_RXFC_MAX_WND_MUL * |
166 | DEFAULT_INIT_CONN_RXFC_WND, | |
b212d554 | 167 | get_time, ch)) |
f538b421 HL |
168 | goto err; |
169 | ||
a6b6ea17 HL |
170 | if (!ossl_quic_rxfc_init_for_stream_count(&ch->max_streams_bidi_rxfc, |
171 | DEFAULT_INIT_CONN_MAX_STREAMS, | |
172 | get_time, ch)) | |
173 | goto err; | |
174 | ||
175 | if (!ossl_quic_rxfc_init_for_stream_count(&ch->max_streams_uni_rxfc, | |
176 | DEFAULT_INIT_CONN_MAX_STREAMS, | |
177 | get_time, ch)) | |
178 | goto err; | |
179 | ||
f538b421 HL |
180 | if (!ossl_statm_init(&ch->statm)) |
181 | goto err; | |
182 | ||
183 | ch->have_statm = 1; | |
f6f45c55 | 184 | ch->cc_method = &ossl_cc_newreno_method; |
66ec5348 | 185 | if ((ch->cc_data = ch->cc_method->new(get_time, ch)) == NULL) |
f538b421 HL |
186 | goto err; |
187 | ||
b212d554 | 188 | if ((ch->ackm = ossl_ackm_new(get_time, ch, &ch->statm, |
f538b421 HL |
189 | ch->cc_method, ch->cc_data)) == NULL) |
190 | goto err; | |
191 | ||
a6b6ea17 HL |
192 | if (!ossl_quic_stream_map_init(&ch->qsm, get_stream_limit, ch, |
193 | &ch->max_streams_bidi_rxfc, | |
5915a900 HL |
194 | &ch->max_streams_uni_rxfc, |
195 | ch->is_server)) | |
f538b421 HL |
196 | goto err; |
197 | ||
198 | ch->have_qsm = 1; | |
199 | ||
200 | /* We use a zero-length SCID. */ | |
a6b6ea17 HL |
201 | txp_args.cur_dcid = ch->init_dcid; |
202 | txp_args.ack_delay_exponent = 3; | |
203 | txp_args.qtx = ch->qtx; | |
204 | txp_args.txpim = ch->txpim; | |
205 | txp_args.cfq = ch->cfq; | |
206 | txp_args.ackm = ch->ackm; | |
207 | txp_args.qsm = &ch->qsm; | |
208 | txp_args.conn_txfc = &ch->conn_txfc; | |
209 | txp_args.conn_rxfc = &ch->conn_rxfc; | |
210 | txp_args.max_streams_bidi_rxfc = &ch->max_streams_bidi_rxfc; | |
211 | txp_args.max_streams_uni_rxfc = &ch->max_streams_uni_rxfc; | |
212 | txp_args.cc_method = ch->cc_method; | |
213 | txp_args.cc_data = ch->cc_data; | |
214 | txp_args.now = get_time; | |
215 | txp_args.now_arg = ch; | |
45454ccc | 216 | |
f538b421 HL |
217 | for (pn_space = QUIC_PN_SPACE_INITIAL; pn_space < QUIC_PN_SPACE_NUM; ++pn_space) { |
218 | ch->crypto_send[pn_space] = ossl_quic_sstream_new(INIT_CRYPTO_BUF_LEN); | |
219 | if (ch->crypto_send[pn_space] == NULL) | |
220 | goto err; | |
221 | ||
222 | txp_args.crypto[pn_space] = ch->crypto_send[pn_space]; | |
223 | } | |
224 | ||
225 | ch->txp = ossl_quic_tx_packetiser_new(&txp_args); | |
226 | if (ch->txp == NULL) | |
227 | goto err; | |
228 | ||
8a65e7a5 HL |
229 | ossl_quic_tx_packetiser_set_ack_tx_cb(ch->txp, ch_on_txp_ack_tx, ch); |
230 | ||
b1b06da2 HL |
231 | if ((ch->demux = ossl_quic_demux_new(/*BIO=*/NULL, |
232 | /*Short CID Len=*/rx_short_cid_len, | |
b212d554 | 233 | get_time, ch)) == NULL) |
f538b421 HL |
234 | goto err; |
235 | ||
b1b06da2 HL |
236 | /* |
237 | * If we are a server, setup our handler for packets not corresponding to | |
238 | * any known DCID on our end. This is for handling clients establishing new | |
239 | * connections. | |
240 | */ | |
241 | if (ch->is_server) | |
242 | ossl_quic_demux_set_default_handler(ch->demux, | |
243 | ch_default_packet_handler, | |
244 | ch); | |
245 | ||
c2212dc1 | 246 | qrx_args.libctx = ch->libctx; |
f538b421 | 247 | qrx_args.demux = ch->demux; |
b1b06da2 | 248 | qrx_args.short_conn_id_len = rx_short_cid_len; |
f538b421 HL |
249 | qrx_args.max_deferred = 32; |
250 | ||
251 | if ((ch->qrx = ossl_qrx_new(&qrx_args)) == NULL) | |
252 | goto err; | |
253 | ||
254 | if (!ossl_qrx_set_early_validation_cb(ch->qrx, | |
255 | rx_early_validate, | |
256 | ch)) | |
257 | goto err; | |
258 | ||
8a65e7a5 HL |
259 | if (!ossl_qrx_set_key_update_cb(ch->qrx, |
260 | rxku_detected, | |
261 | ch)) | |
262 | goto err; | |
263 | ||
b1b06da2 | 264 | if (!ch->is_server && !ossl_qrx_add_dst_conn_id(ch->qrx, &txp_args.cur_scid)) |
f538b421 HL |
265 | goto err; |
266 | ||
267 | for (pn_space = QUIC_PN_SPACE_INITIAL; pn_space < QUIC_PN_SPACE_NUM; ++pn_space) { | |
2113ea58 | 268 | ch->crypto_recv[pn_space] = ossl_quic_rstream_new(NULL, NULL, 0); |
f538b421 HL |
269 | if (ch->crypto_recv[pn_space] == NULL) |
270 | goto err; | |
271 | } | |
272 | ||
2723d705 MC |
273 | /* Plug in the TLS handshake layer. */ |
274 | tls_args.s = ch->tls; | |
275 | tls_args.crypto_send_cb = ch_on_crypto_send; | |
276 | tls_args.crypto_send_cb_arg = ch; | |
7257188b MC |
277 | tls_args.crypto_recv_rcd_cb = ch_on_crypto_recv_record; |
278 | tls_args.crypto_recv_rcd_cb_arg = ch; | |
279 | tls_args.crypto_release_rcd_cb = ch_on_crypto_release_record; | |
280 | tls_args.crypto_release_rcd_cb_arg = ch; | |
2723d705 MC |
281 | tls_args.yield_secret_cb = ch_on_handshake_yield_secret; |
282 | tls_args.yield_secret_cb_arg = ch; | |
283 | tls_args.got_transport_params_cb = ch_on_transport_params; | |
284 | tls_args.got_transport_params_cb_arg= ch; | |
285 | tls_args.handshake_complete_cb = ch_on_handshake_complete; | |
286 | tls_args.handshake_complete_cb_arg = ch; | |
287 | tls_args.alert_cb = ch_on_handshake_alert; | |
288 | tls_args.alert_cb_arg = ch; | |
289 | tls_args.is_server = ch->is_server; | |
290 | ||
291 | if ((ch->qtls = ossl_quic_tls_new(&tls_args)) == NULL) | |
f538b421 HL |
292 | goto err; |
293 | ||
4648eac5 HL |
294 | ch->rx_max_ack_delay = QUIC_DEFAULT_MAX_ACK_DELAY; |
295 | ch->rx_ack_delay_exp = QUIC_DEFAULT_ACK_DELAY_EXP; | |
296 | ch->rx_active_conn_id_limit = QUIC_MIN_ACTIVE_CONN_ID_LIMIT; | |
297 | ch->max_idle_timeout = QUIC_DEFAULT_IDLE_TIMEOUT; | |
298 | ch->tx_enc_level = QUIC_ENC_LEVEL_INITIAL; | |
299 | ch->rx_enc_level = QUIC_ENC_LEVEL_INITIAL; | |
16f3b542 | 300 | ch->txku_threshold_override = UINT64_MAX; |
4648eac5 | 301 | |
f538b421 HL |
302 | /* |
303 | * Determine the QUIC Transport Parameters and serialize the transport | |
304 | * parameters block. (For servers, we do this later as we must defer | |
305 | * generation until we have received the client's transport parameters.) | |
306 | */ | |
307 | if (!ch->is_server && !ch_generate_transport_params(ch)) | |
308 | goto err; | |
309 | ||
f538b421 HL |
310 | ch_update_idle(ch); |
311 | ossl_quic_reactor_init(&ch->rtor, ch_tick, ch, | |
312 | ch_determine_next_tick_deadline(ch)); | |
313 | return 1; | |
314 | ||
315 | err: | |
316 | ch_cleanup(ch); | |
317 | return 0; | |
318 | } | |
319 | ||
320 | static void ch_cleanup(QUIC_CHANNEL *ch) | |
321 | { | |
322 | uint32_t pn_space; | |
323 | ||
324 | if (ch->ackm != NULL) | |
325 | for (pn_space = QUIC_PN_SPACE_INITIAL; | |
326 | pn_space < QUIC_PN_SPACE_NUM; | |
327 | ++pn_space) | |
328 | ossl_ackm_on_pkt_space_discarded(ch->ackm, pn_space); | |
329 | ||
330 | ossl_quic_tx_packetiser_free(ch->txp); | |
331 | ossl_quic_txpim_free(ch->txpim); | |
332 | ossl_quic_cfq_free(ch->cfq); | |
333 | ossl_qtx_free(ch->qtx); | |
334 | if (ch->cc_data != NULL) | |
335 | ch->cc_method->free(ch->cc_data); | |
336 | if (ch->have_statm) | |
337 | ossl_statm_destroy(&ch->statm); | |
338 | ossl_ackm_free(ch->ackm); | |
339 | ||
f538b421 HL |
340 | if (ch->have_qsm) |
341 | ossl_quic_stream_map_cleanup(&ch->qsm); | |
342 | ||
343 | for (pn_space = QUIC_PN_SPACE_INITIAL; pn_space < QUIC_PN_SPACE_NUM; ++pn_space) { | |
344 | ossl_quic_sstream_free(ch->crypto_send[pn_space]); | |
345 | ossl_quic_rstream_free(ch->crypto_recv[pn_space]); | |
346 | } | |
347 | ||
348 | ossl_qrx_pkt_release(ch->qrx_pkt); | |
349 | ch->qrx_pkt = NULL; | |
350 | ||
2723d705 | 351 | ossl_quic_tls_free(ch->qtls); |
f538b421 HL |
352 | ossl_qrx_free(ch->qrx); |
353 | ossl_quic_demux_free(ch->demux); | |
354 | OPENSSL_free(ch->local_transport_params); | |
f538b421 HL |
355 | } |
356 | ||
357 | QUIC_CHANNEL *ossl_quic_channel_new(const QUIC_CHANNEL_ARGS *args) | |
358 | { | |
359 | QUIC_CHANNEL *ch = NULL; | |
360 | ||
361 | if ((ch = OPENSSL_zalloc(sizeof(*ch))) == NULL) | |
362 | return NULL; | |
363 | ||
5cf99b40 MC |
364 | ch->libctx = args->libctx; |
365 | ch->propq = args->propq; | |
366 | ch->is_server = args->is_server; | |
367 | ch->tls = args->tls; | |
368 | ch->mutex = args->mutex; | |
369 | ch->now_cb = args->now_cb; | |
370 | ch->now_cb_arg = args->now_cb_arg; | |
f538b421 HL |
371 | |
372 | if (!ch_init(ch)) { | |
373 | OPENSSL_free(ch); | |
374 | return NULL; | |
375 | } | |
376 | ||
377 | return ch; | |
378 | } | |
379 | ||
380 | void ossl_quic_channel_free(QUIC_CHANNEL *ch) | |
381 | { | |
382 | if (ch == NULL) | |
383 | return; | |
384 | ||
385 | ch_cleanup(ch); | |
386 | OPENSSL_free(ch); | |
387 | } | |
388 | ||
14e31409 MC |
389 | /* Set mutator callbacks for test framework support */ |
390 | int ossl_quic_channel_set_mutator(QUIC_CHANNEL *ch, | |
391 | ossl_mutate_packet_cb mutatecb, | |
392 | ossl_finish_mutate_cb finishmutatecb, | |
393 | void *mutatearg) | |
394 | { | |
395 | if (ch->qtx == NULL) | |
396 | return 0; | |
397 | ||
398 | ossl_qtx_set_mutator(ch->qtx, mutatecb, finishmutatecb, mutatearg); | |
399 | return 1; | |
400 | } | |
401 | ||
f538b421 HL |
402 | int ossl_quic_channel_get_peer_addr(QUIC_CHANNEL *ch, BIO_ADDR *peer_addr) |
403 | { | |
404 | *peer_addr = ch->cur_peer_addr; | |
405 | return 1; | |
406 | } | |
407 | ||
408 | int ossl_quic_channel_set_peer_addr(QUIC_CHANNEL *ch, const BIO_ADDR *peer_addr) | |
409 | { | |
410 | ch->cur_peer_addr = *peer_addr; | |
411 | return 1; | |
412 | } | |
413 | ||
414 | QUIC_REACTOR *ossl_quic_channel_get_reactor(QUIC_CHANNEL *ch) | |
415 | { | |
416 | return &ch->rtor; | |
417 | } | |
418 | ||
419 | QUIC_STREAM_MAP *ossl_quic_channel_get_qsm(QUIC_CHANNEL *ch) | |
420 | { | |
421 | return &ch->qsm; | |
422 | } | |
423 | ||
424 | OSSL_STATM *ossl_quic_channel_get_statm(QUIC_CHANNEL *ch) | |
425 | { | |
426 | return &ch->statm; | |
427 | } | |
428 | ||
429 | QUIC_STREAM *ossl_quic_channel_get_stream_by_id(QUIC_CHANNEL *ch, | |
430 | uint64_t stream_id) | |
431 | { | |
432 | return ossl_quic_stream_map_get_by_id(&ch->qsm, stream_id); | |
433 | } | |
434 | ||
435 | int ossl_quic_channel_is_active(const QUIC_CHANNEL *ch) | |
436 | { | |
437 | return ch != NULL && ch->state == QUIC_CHANNEL_STATE_ACTIVE; | |
438 | } | |
439 | ||
c12e1113 | 440 | int ossl_quic_channel_is_terminating(const QUIC_CHANNEL *ch) |
f538b421 | 441 | { |
149a8e6c | 442 | if (ch->state == QUIC_CHANNEL_STATE_TERMINATING_CLOSING |
c12e1113 | 443 | || ch->state == QUIC_CHANNEL_STATE_TERMINATING_DRAINING) |
149a8e6c | 444 | return 1; |
c12e1113 | 445 | |
149a8e6c | 446 | return 0; |
f538b421 HL |
447 | } |
448 | ||
c12e1113 | 449 | int ossl_quic_channel_is_terminated(const QUIC_CHANNEL *ch) |
f538b421 | 450 | { |
c12e1113 | 451 | if (ch->state == QUIC_CHANNEL_STATE_TERMINATED) |
149a8e6c | 452 | return 1; |
c12e1113 | 453 | |
149a8e6c | 454 | return 0; |
f538b421 HL |
455 | } |
456 | ||
c12e1113 MC |
457 | int ossl_quic_channel_is_term_any(const QUIC_CHANNEL *ch) |
458 | { | |
459 | return ossl_quic_channel_is_terminating(ch) | |
460 | || ossl_quic_channel_is_terminated(ch); | |
461 | } | |
462 | ||
723cbe8a HL |
463 | const QUIC_TERMINATE_CAUSE * |
464 | ossl_quic_channel_get_terminate_cause(const QUIC_CHANNEL *ch) | |
f538b421 | 465 | { |
723cbe8a | 466 | return ossl_quic_channel_is_term_any(ch) ? &ch->terminate_cause : NULL; |
f538b421 HL |
467 | } |
468 | ||
469 | int ossl_quic_channel_is_handshake_complete(const QUIC_CHANNEL *ch) | |
470 | { | |
471 | return ch->handshake_complete; | |
472 | } | |
473 | ||
ce8f20b6 MC |
474 | int ossl_quic_channel_is_handshake_confirmed(const QUIC_CHANNEL *ch) |
475 | { | |
476 | return ch->handshake_confirmed; | |
477 | } | |
478 | ||
553a4e00 HL |
479 | QUIC_DEMUX *ossl_quic_channel_get0_demux(QUIC_CHANNEL *ch) |
480 | { | |
481 | return ch->demux; | |
482 | } | |
483 | ||
fb2245c4 HL |
484 | CRYPTO_MUTEX *ossl_quic_channel_get_mutex(QUIC_CHANNEL *ch) |
485 | { | |
486 | return ch->mutex; | |
487 | } | |
488 | ||
9280d26a HL |
489 | int ossl_quic_channel_has_pending(const QUIC_CHANNEL *ch) |
490 | { | |
491 | return ossl_quic_demux_has_pending(ch->demux) | |
492 | || ossl_qrx_processed_read_pending(ch->qrx); | |
493 | } | |
494 | ||
f538b421 HL |
495 | /* |
496 | * QUIC Channel: Callbacks from Miscellaneous Subsidiary Components | |
497 | * ================================================================ | |
498 | */ | |
499 | ||
500 | /* Used by various components. */ | |
501 | static OSSL_TIME get_time(void *arg) | |
502 | { | |
b212d554 HL |
503 | QUIC_CHANNEL *ch = arg; |
504 | ||
505 | if (ch->now_cb == NULL) | |
506 | return ossl_time_now(); | |
507 | ||
508 | return ch->now_cb(ch->now_cb_arg); | |
f538b421 HL |
509 | } |
510 | ||
511 | /* Used by QSM. */ | |
512 | static uint64_t get_stream_limit(int uni, void *arg) | |
513 | { | |
514 | QUIC_CHANNEL *ch = arg; | |
515 | ||
516 | return uni ? ch->max_local_streams_uni : ch->max_local_streams_bidi; | |
517 | } | |
518 | ||
519 | /* | |
520 | * Called by QRX to determine if a packet is potentially invalid before trying | |
521 | * to decrypt it. | |
522 | */ | |
523 | static int rx_early_validate(QUIC_PN pn, int pn_space, void *arg) | |
524 | { | |
525 | QUIC_CHANNEL *ch = arg; | |
526 | ||
527 | /* Potential duplicates should not be processed. */ | |
528 | if (!ossl_ackm_is_rx_pn_processable(ch->ackm, pn, pn_space)) | |
529 | return 0; | |
530 | ||
531 | return 1; | |
532 | } | |
533 | ||
8a65e7a5 HL |
534 | /* |
535 | * Triggers a TXKU (whether spontaneous or solicited). Does not check whether | |
536 | * spontaneous TXKU is currently allowed. | |
537 | */ | |
538 | QUIC_NEEDS_LOCK | |
539 | static void ch_trigger_txku(QUIC_CHANNEL *ch) | |
540 | { | |
541 | uint64_t next_pn | |
542 | = ossl_quic_tx_packetiser_get_next_pn(ch->txp, QUIC_PN_SPACE_APP); | |
543 | ||
544 | if (!ossl_quic_pn_valid(next_pn) | |
545 | || !ossl_qtx_trigger_key_update(ch->qtx)) { | |
546 | ossl_quic_channel_raise_protocol_error(ch, QUIC_ERR_INTERNAL_ERROR, 0, | |
547 | "key update"); | |
548 | return; | |
549 | } | |
550 | ||
551 | ch->txku_in_progress = 1; | |
552 | ch->txku_pn = next_pn; | |
553 | ch->rxku_expected = ch->ku_locally_initiated; | |
554 | } | |
555 | ||
556 | QUIC_NEEDS_LOCK | |
557 | static int txku_in_progress(QUIC_CHANNEL *ch) | |
558 | { | |
559 | if (ch->txku_in_progress | |
560 | && ossl_ackm_get_largest_acked(ch->ackm, QUIC_PN_SPACE_APP) >= ch->txku_pn) { | |
561 | OSSL_TIME pto = ossl_ackm_get_pto_duration(ch->ackm); | |
562 | ||
563 | /* | |
564 | * RFC 9001 s. 6.5: Endpoints SHOULD wait three times the PTO before | |
565 | * initiating a key update after receiving an acknowledgment that | |
566 | * confirms that the previous key update was received. | |
567 | * | |
568 | * Note that by the above wording, this period starts from when we get | |
569 | * the ack for a TXKU-triggering packet, not when the TXKU is initiated. | |
570 | * So we defer TXKU cooldown deadline calculation to this point. | |
571 | */ | |
572 | ch->txku_in_progress = 0; | |
573 | ch->txku_cooldown_deadline = ossl_time_add(get_time(ch), | |
574 | ossl_time_multiply(pto, 3)); | |
575 | } | |
576 | ||
577 | return ch->txku_in_progress; | |
578 | } | |
579 | ||
580 | QUIC_NEEDS_LOCK | |
581 | static int txku_allowed(QUIC_CHANNEL *ch) | |
582 | { | |
583 | return ch->tx_enc_level == QUIC_ENC_LEVEL_1RTT /* Sanity check. */ | |
584 | /* Strict RFC 9001 criterion for TXKU. */ | |
585 | && ch->handshake_confirmed | |
586 | && !txku_in_progress(ch); | |
587 | } | |
588 | ||
589 | QUIC_NEEDS_LOCK | |
590 | static int txku_recommendable(QUIC_CHANNEL *ch) | |
591 | { | |
592 | if (!txku_allowed(ch)) | |
593 | return 0; | |
594 | ||
595 | return | |
596 | /* Recommended RFC 9001 criterion for TXKU. */ | |
597 | ossl_time_compare(get_time(ch), ch->txku_cooldown_deadline) >= 0 | |
598 | /* Some additional sensible criteria. */ | |
599 | && !ch->rxku_in_progress | |
600 | && !ch->rxku_pending_confirm; | |
601 | } | |
602 | ||
603 | QUIC_NEEDS_LOCK | |
604 | static int txku_desirable(QUIC_CHANNEL *ch) | |
605 | { | |
16f3b542 | 606 | uint64_t cur_pkt_count, max_pkt_count, thresh_pkt_count; |
8a65e7a5 HL |
607 | const uint32_t enc_level = QUIC_ENC_LEVEL_1RTT; |
608 | ||
609 | /* Check AEAD limit to determine if we should perform a spontaneous TXKU. */ | |
610 | cur_pkt_count = ossl_qtx_get_cur_epoch_pkt_count(ch->qtx, enc_level); | |
611 | max_pkt_count = ossl_qtx_get_max_epoch_pkt_count(ch->qtx, enc_level); | |
612 | ||
16f3b542 HL |
613 | thresh_pkt_count = max_pkt_count / 2; |
614 | if (ch->txku_threshold_override != UINT64_MAX) | |
615 | thresh_pkt_count = ch->txku_threshold_override; | |
616 | ||
617 | return cur_pkt_count >= thresh_pkt_count; | |
8a65e7a5 HL |
618 | } |
619 | ||
620 | QUIC_NEEDS_LOCK | |
621 | static void ch_maybe_trigger_spontaneous_txku(QUIC_CHANNEL *ch) | |
622 | { | |
623 | if (!txku_recommendable(ch) || !txku_desirable(ch)) | |
624 | return; | |
625 | ||
626 | ch->ku_locally_initiated = 1; | |
627 | ch_trigger_txku(ch); | |
628 | } | |
629 | ||
630 | QUIC_NEEDS_LOCK | |
631 | static int rxku_allowed(QUIC_CHANNEL *ch) | |
632 | { | |
633 | /* | |
634 | * RFC 9001 s. 6.1: An endpoint MUST NOT initiate a key update prior to | |
635 | * having confirmed the handshake (Section 4.1.2). | |
636 | * | |
637 | * RFC 9001 s. 6.1: An endpoint MUST NOT initiate a subsequent key update | |
638 | * unless it has received an acknowledgment for a packet that was sent | |
639 | * protected with keys from the current key phase. | |
640 | * | |
641 | * RFC 9001 s. 6.2: If an endpoint detects a second update before it has | |
642 | * sent any packets with updated keys containing an acknowledgment for the | |
643 | * packet that initiated the key update, it indicates that its peer has | |
644 | * updated keys twice without awaiting confirmation. An endpoint MAY treat | |
645 | * such consecutive key updates as a connection error of type | |
646 | * KEY_UPDATE_ERROR. | |
647 | */ | |
648 | return ch->handshake_confirmed && !ch->rxku_pending_confirm; | |
649 | } | |
650 | ||
651 | /* | |
652 | * Called when the QRX detects a new RX key update event. | |
653 | */ | |
654 | enum rxku_decision { | |
655 | DECISION_RXKU_ONLY, | |
656 | DECISION_PROTOCOL_VIOLATION, | |
657 | DECISION_SOLICITED_TXKU | |
658 | }; | |
659 | ||
660 | /* Called when the QRX detects a key update has occurred. */ | |
661 | QUIC_NEEDS_LOCK | |
662 | static void rxku_detected(QUIC_PN pn, void *arg) | |
663 | { | |
664 | QUIC_CHANNEL *ch = arg; | |
665 | enum rxku_decision decision; | |
666 | OSSL_TIME pto; | |
667 | ||
668 | /* | |
669 | * Note: rxku_in_progress is always 0 here as an RXKU cannot be detected | |
670 | * when we are still in UPDATING or COOLDOWN (see quic_record_rx.h). | |
671 | */ | |
672 | assert(!ch->rxku_in_progress); | |
673 | ||
674 | if (!rxku_allowed(ch)) | |
675 | /* Is RXKU even allowed at this time? */ | |
676 | decision = DECISION_PROTOCOL_VIOLATION; | |
677 | ||
678 | else if (ch->ku_locally_initiated) | |
679 | /* | |
680 | * If this key update was locally initiated (meaning that this detected | |
681 | * RXKU event is a result of our own spontaneous TXKU), we do not | |
682 | * trigger another TXKU; after all, to do so would result in an infinite | |
683 | * ping-pong of key updates. We still process it as an RXKU. | |
684 | */ | |
685 | decision = DECISION_RXKU_ONLY; | |
686 | ||
687 | else | |
688 | /* | |
689 | * Otherwise, a peer triggering a KU means we have to trigger a KU also. | |
690 | */ | |
691 | decision = DECISION_SOLICITED_TXKU; | |
692 | ||
693 | if (decision == DECISION_PROTOCOL_VIOLATION) { | |
694 | ossl_quic_channel_raise_protocol_error(ch, QUIC_ERR_KEY_UPDATE_ERROR, | |
695 | 0, "RX key update again too soon"); | |
696 | return; | |
697 | } | |
698 | ||
699 | pto = ossl_ackm_get_pto_duration(ch->ackm); | |
700 | ||
701 | ch->ku_locally_initiated = 0; | |
702 | ch->rxku_in_progress = 1; | |
703 | ch->rxku_pending_confirm = 1; | |
704 | ch->rxku_trigger_pn = pn; | |
705 | ch->rxku_update_end_deadline = ossl_time_add(get_time(ch), pto); | |
c93f7668 | 706 | ch->rxku_expected = 0; |
8a65e7a5 HL |
707 | |
708 | if (decision == DECISION_SOLICITED_TXKU) | |
709 | /* NOT gated by usual txku_allowed() */ | |
710 | ch_trigger_txku(ch); | |
37ba2bc7 HL |
711 | |
712 | /* | |
713 | * Ordinarily, we only generate ACK when some ACK-eliciting frame has been | |
714 | * received. In some cases, this may not occur for a long time, for example | |
715 | * if transmission of application data is going in only one direction and | |
716 | * nothing else is happening with the connection. However, since the peer | |
717 | * cannot initiate a subsequent (spontaneous) TXKU until its prior | |
692a3cab | 718 | * (spontaneous or solicited) TXKU has completed - meaning that prior |
37ba2bc7 HL |
719 | * TXKU's trigger packet (or subsequent packet) has been acknowledged, this |
720 | * can lead to very long times before a TXKU is considered 'completed'. | |
721 | * Optimise this by forcing ACK generation after triggering TXKU. | |
722 | * (Basically, we consider a RXKU event something that is 'ACK-eliciting', | |
723 | * which it more or less should be; it is necessarily separate from ordinary | |
724 | * processing of ACK-eliciting frames as key update is not indicated via a | |
725 | * frame.) | |
726 | */ | |
727 | ossl_quic_tx_packetiser_schedule_ack(ch->txp, QUIC_PN_SPACE_APP); | |
8a65e7a5 HL |
728 | } |
729 | ||
730 | /* Called per tick to handle RXKU timer events. */ | |
731 | QUIC_NEEDS_LOCK | |
732 | static void ch_rxku_tick(QUIC_CHANNEL *ch) | |
733 | { | |
734 | if (!ch->rxku_in_progress | |
735 | || ossl_time_compare(get_time(ch), ch->rxku_update_end_deadline) < 0) | |
736 | return; | |
737 | ||
738 | ch->rxku_update_end_deadline = ossl_time_infinite(); | |
739 | ch->rxku_in_progress = 0; | |
740 | ||
741 | if (!ossl_qrx_key_update_timeout(ch->qrx, /*normal=*/1)) | |
742 | ossl_quic_channel_raise_protocol_error(ch, QUIC_ERR_INTERNAL_ERROR, 0, | |
743 | "RXKU cooldown internal error"); | |
744 | } | |
745 | ||
746 | QUIC_NEEDS_LOCK | |
747 | static void ch_on_txp_ack_tx(const OSSL_QUIC_FRAME_ACK *ack, uint32_t pn_space, | |
748 | void *arg) | |
749 | { | |
750 | QUIC_CHANNEL *ch = arg; | |
751 | ||
752 | if (pn_space != QUIC_PN_SPACE_APP || !ch->rxku_pending_confirm | |
753 | || !ossl_quic_frame_ack_contains_pn(ack, ch->rxku_trigger_pn)) | |
754 | return; | |
755 | ||
756 | /* | |
757 | * Defer clearing rxku_pending_confirm until TXP generate call returns | |
758 | * successfully. | |
759 | */ | |
760 | ch->rxku_pending_confirm_done = 1; | |
761 | } | |
762 | ||
f538b421 HL |
763 | /* |
764 | * QUIC Channel: Handshake Layer Event Handling | |
765 | * ============================================ | |
766 | */ | |
767 | static int ch_on_crypto_send(const unsigned char *buf, size_t buf_len, | |
768 | size_t *consumed, void *arg) | |
769 | { | |
770 | int ret; | |
771 | QUIC_CHANNEL *ch = arg; | |
772 | uint32_t enc_level = ch->tx_enc_level; | |
773 | uint32_t pn_space = ossl_quic_enc_level_to_pn_space(enc_level); | |
774 | QUIC_SSTREAM *sstream = ch->crypto_send[pn_space]; | |
775 | ||
776 | if (!ossl_assert(sstream != NULL)) | |
777 | return 0; | |
778 | ||
779 | ret = ossl_quic_sstream_append(sstream, buf, buf_len, consumed); | |
780 | return ret; | |
781 | } | |
782 | ||
783 | static int crypto_ensure_empty(QUIC_RSTREAM *rstream) | |
784 | { | |
785 | size_t avail = 0; | |
786 | int is_fin = 0; | |
787 | ||
788 | if (rstream == NULL) | |
789 | return 1; | |
790 | ||
791 | if (!ossl_quic_rstream_available(rstream, &avail, &is_fin)) | |
792 | return 0; | |
793 | ||
794 | return avail == 0; | |
795 | } | |
796 | ||
7257188b MC |
797 | static int ch_on_crypto_recv_record(const unsigned char **buf, |
798 | size_t *bytes_read, void *arg) | |
f538b421 HL |
799 | { |
800 | QUIC_CHANNEL *ch = arg; | |
801 | QUIC_RSTREAM *rstream; | |
802 | int is_fin = 0; /* crypto stream is never finished, so we don't use this */ | |
803 | uint32_t i; | |
804 | ||
805 | /* | |
806 | * After we move to a later EL we must not allow our peer to send any new | |
807 | * bytes in the crypto stream on a previous EL. Retransmissions of old bytes | |
808 | * are allowed. | |
809 | * | |
810 | * In practice we will only move to a new EL when we have consumed all bytes | |
811 | * which should be sent on the crypto stream at a previous EL. For example, | |
812 | * the Handshake EL should not be provisioned until we have completely | |
813 | * consumed a TLS 1.3 ServerHello. Thus when we provision an EL the output | |
814 | * of ossl_quic_rstream_available() should be 0 for all lower ELs. Thus if a | |
815 | * given EL is available we simply ensure we have not received any further | |
816 | * bytes at a lower EL. | |
817 | */ | |
45ecfc9b | 818 | for (i = QUIC_ENC_LEVEL_INITIAL; i < ch->rx_enc_level; ++i) |
f538b421 HL |
819 | if (i != QUIC_ENC_LEVEL_0RTT && |
820 | !crypto_ensure_empty(ch->crypto_recv[ossl_quic_enc_level_to_pn_space(i)])) { | |
821 | /* Protocol violation (RFC 9001 s. 4.1.3) */ | |
822 | ossl_quic_channel_raise_protocol_error(ch, QUIC_ERR_PROTOCOL_VIOLATION, | |
823 | OSSL_QUIC_FRAME_TYPE_CRYPTO, | |
824 | "crypto stream data in wrong EL"); | |
825 | return 0; | |
826 | } | |
827 | ||
45ecfc9b | 828 | rstream = ch->crypto_recv[ossl_quic_enc_level_to_pn_space(ch->rx_enc_level)]; |
f538b421 HL |
829 | if (rstream == NULL) |
830 | return 0; | |
831 | ||
7257188b MC |
832 | return ossl_quic_rstream_get_record(rstream, buf, bytes_read, |
833 | &is_fin); | |
834 | } | |
835 | ||
836 | static int ch_on_crypto_release_record(size_t bytes_read, void *arg) | |
837 | { | |
838 | QUIC_CHANNEL *ch = arg; | |
839 | QUIC_RSTREAM *rstream; | |
840 | ||
841 | rstream = ch->crypto_recv[ossl_quic_enc_level_to_pn_space(ch->rx_enc_level)]; | |
842 | if (rstream == NULL) | |
843 | return 0; | |
844 | ||
845 | return ossl_quic_rstream_release_record(rstream, bytes_read); | |
f538b421 HL |
846 | } |
847 | ||
848 | static int ch_on_handshake_yield_secret(uint32_t enc_level, int direction, | |
849 | uint32_t suite_id, EVP_MD *md, | |
850 | const unsigned char *secret, | |
851 | size_t secret_len, | |
852 | void *arg) | |
853 | { | |
854 | QUIC_CHANNEL *ch = arg; | |
855 | uint32_t i; | |
856 | ||
857 | if (enc_level < QUIC_ENC_LEVEL_HANDSHAKE || enc_level >= QUIC_ENC_LEVEL_NUM) | |
858 | /* Invalid EL. */ | |
859 | return 0; | |
860 | ||
f538b421 HL |
861 | |
862 | if (direction) { | |
863 | /* TX */ | |
45ecfc9b MC |
864 | if (enc_level <= ch->tx_enc_level) |
865 | /* | |
9f0ade7c HL |
866 | * Does not make sense for us to try and provision an EL we have already |
867 | * attained. | |
868 | */ | |
45ecfc9b MC |
869 | return 0; |
870 | ||
f538b421 HL |
871 | if (!ossl_qtx_provide_secret(ch->qtx, enc_level, |
872 | suite_id, md, | |
873 | secret, secret_len)) | |
874 | return 0; | |
875 | ||
876 | ch->tx_enc_level = enc_level; | |
877 | } else { | |
878 | /* RX */ | |
45ecfc9b MC |
879 | if (enc_level <= ch->rx_enc_level) |
880 | /* | |
9f0ade7c HL |
881 | * Does not make sense for us to try and provision an EL we have already |
882 | * attained. | |
883 | */ | |
45ecfc9b MC |
884 | return 0; |
885 | ||
886 | /* | |
9f0ade7c HL |
887 | * Ensure all crypto streams for previous ELs are now empty of available |
888 | * data. | |
889 | */ | |
45ecfc9b | 890 | for (i = QUIC_ENC_LEVEL_INITIAL; i < enc_level; ++i) |
e28f512f | 891 | if (!crypto_ensure_empty(ch->crypto_recv[ossl_quic_enc_level_to_pn_space(i)])) { |
45ecfc9b MC |
892 | /* Protocol violation (RFC 9001 s. 4.1.3) */ |
893 | ossl_quic_channel_raise_protocol_error(ch, QUIC_ERR_PROTOCOL_VIOLATION, | |
894 | OSSL_QUIC_FRAME_TYPE_CRYPTO, | |
895 | "crypto stream data in wrong EL"); | |
896 | return 0; | |
897 | } | |
898 | ||
f538b421 HL |
899 | if (!ossl_qrx_provide_secret(ch->qrx, enc_level, |
900 | suite_id, md, | |
901 | secret, secret_len)) | |
902 | return 0; | |
92282a17 HL |
903 | |
904 | ch->have_new_rx_secret = 1; | |
45ecfc9b | 905 | ch->rx_enc_level = enc_level; |
f538b421 HL |
906 | } |
907 | ||
908 | return 1; | |
909 | } | |
910 | ||
911 | static int ch_on_handshake_complete(void *arg) | |
912 | { | |
913 | QUIC_CHANNEL *ch = arg; | |
914 | ||
e28f512f | 915 | if (!ossl_assert(!ch->handshake_complete)) |
f538b421 HL |
916 | return 0; /* this should not happen twice */ |
917 | ||
918 | if (!ossl_assert(ch->tx_enc_level == QUIC_ENC_LEVEL_1RTT)) | |
919 | return 0; | |
920 | ||
62d0da12 | 921 | if (!ch->got_remote_transport_params) { |
f538b421 HL |
922 | /* |
923 | * Was not a valid QUIC handshake if we did not get valid transport | |
924 | * params. | |
925 | */ | |
62d0da12 MC |
926 | ossl_quic_channel_raise_protocol_error(ch, QUIC_ERR_PROTOCOL_VIOLATION, |
927 | OSSL_QUIC_FRAME_TYPE_CRYPTO, | |
928 | "no transport parameters received"); | |
f538b421 | 929 | return 0; |
62d0da12 | 930 | } |
f538b421 HL |
931 | |
932 | /* Don't need transport parameters anymore. */ | |
933 | OPENSSL_free(ch->local_transport_params); | |
934 | ch->local_transport_params = NULL; | |
935 | ||
936 | /* Tell TXP the handshake is complete. */ | |
937 | ossl_quic_tx_packetiser_notify_handshake_complete(ch->txp); | |
938 | ||
939 | ch->handshake_complete = 1; | |
b1b06da2 HL |
940 | |
941 | if (ch->is_server) { | |
942 | /* | |
943 | * On the server, the handshake is confirmed as soon as it is complete. | |
944 | */ | |
945 | ossl_quic_channel_on_handshake_confirmed(ch); | |
946 | ||
947 | ossl_quic_tx_packetiser_schedule_handshake_done(ch->txp); | |
948 | } | |
949 | ||
f538b421 HL |
950 | return 1; |
951 | } | |
952 | ||
953 | static int ch_on_handshake_alert(void *arg, unsigned char alert_code) | |
954 | { | |
955 | QUIC_CHANNEL *ch = arg; | |
956 | ||
957 | ossl_quic_channel_raise_protocol_error(ch, QUIC_ERR_CRYPTO_ERR_BEGIN + alert_code, | |
958 | 0, "handshake alert"); | |
959 | return 1; | |
960 | } | |
961 | ||
962 | /* | |
963 | * QUIC Channel: Transport Parameter Handling | |
964 | * ========================================== | |
965 | */ | |
966 | ||
967 | /* | |
968 | * Called by handshake layer when we receive QUIC Transport Parameters from the | |
969 | * peer. Note that these are not authenticated until the handshake is marked | |
970 | * as complete. | |
971 | */ | |
3c567a52 HL |
972 | #define TP_REASON_SERVER_ONLY(x) \ |
973 | x " may not be sent by a client" | |
974 | #define TP_REASON_DUP(x) \ | |
975 | x " appears multiple times" | |
976 | #define TP_REASON_MALFORMED(x) \ | |
977 | x " is malformed" | |
978 | #define TP_REASON_EXPECTED_VALUE(x) \ | |
979 | x " does not match expected value" | |
980 | #define TP_REASON_NOT_RETRY(x) \ | |
981 | x " sent when not performing a retry" | |
982 | #define TP_REASON_REQUIRED(x) \ | |
983 | x " was not sent but is required" | |
984 | ||
26ad16ea HL |
985 | static void txfc_bump_cwm_bidi(QUIC_STREAM *s, void *arg) |
986 | { | |
987 | if (!ossl_quic_stream_is_bidi(s) | |
988 | || ossl_quic_stream_is_server_init(s)) | |
989 | return; | |
990 | ||
991 | ossl_quic_txfc_bump_cwm(&s->txfc, *(uint64_t *)arg); | |
992 | } | |
993 | ||
994 | static void txfc_bump_cwm_uni(QUIC_STREAM *s, void *arg) | |
995 | { | |
996 | if (ossl_quic_stream_is_bidi(s) | |
997 | || ossl_quic_stream_is_server_init(s)) | |
998 | return; | |
999 | ||
1000 | ossl_quic_txfc_bump_cwm(&s->txfc, *(uint64_t *)arg); | |
1001 | } | |
1002 | ||
1003 | static void do_update(QUIC_STREAM *s, void *arg) | |
1004 | { | |
1005 | QUIC_CHANNEL *ch = arg; | |
1006 | ||
1007 | ossl_quic_stream_map_update_state(&ch->qsm, s); | |
1008 | } | |
1009 | ||
f538b421 HL |
1010 | static int ch_on_transport_params(const unsigned char *params, |
1011 | size_t params_len, | |
1012 | void *arg) | |
1013 | { | |
1014 | QUIC_CHANNEL *ch = arg; | |
1015 | PACKET pkt; | |
1016 | uint64_t id, v; | |
1017 | size_t len; | |
1018 | const unsigned char *body; | |
1019 | int got_orig_dcid = 0; | |
1020 | int got_initial_scid = 0; | |
1021 | int got_retry_scid = 0; | |
1022 | int got_initial_max_data = 0; | |
1023 | int got_initial_max_stream_data_bidi_local = 0; | |
1024 | int got_initial_max_stream_data_bidi_remote = 0; | |
1025 | int got_initial_max_stream_data_uni = 0; | |
1026 | int got_initial_max_streams_bidi = 0; | |
1027 | int got_initial_max_streams_uni = 0; | |
1028 | int got_ack_delay_exp = 0; | |
1029 | int got_max_ack_delay = 0; | |
1030 | int got_max_udp_payload_size = 0; | |
1031 | int got_max_idle_timeout = 0; | |
1032 | int got_active_conn_id_limit = 0; | |
1033 | QUIC_CONN_ID cid; | |
3c567a52 | 1034 | const char *reason = "bad transport parameter"; |
f538b421 HL |
1035 | |
1036 | if (ch->got_remote_transport_params) | |
1037 | goto malformed; | |
1038 | ||
1039 | if (!PACKET_buf_init(&pkt, params, params_len)) | |
1040 | return 0; | |
1041 | ||
1042 | while (PACKET_remaining(&pkt) > 0) { | |
1043 | if (!ossl_quic_wire_peek_transport_param(&pkt, &id)) | |
1044 | goto malformed; | |
1045 | ||
1046 | switch (id) { | |
75b2920a | 1047 | case QUIC_TPARAM_ORIG_DCID: |
3c567a52 HL |
1048 | if (got_orig_dcid) { |
1049 | reason = TP_REASON_DUP("ORIG_DCID"); | |
1050 | goto malformed; | |
1051 | } | |
1052 | ||
1053 | if (ch->is_server) { | |
1054 | reason = TP_REASON_SERVER_ONLY("ORIG_DCID"); | |
75b2920a | 1055 | goto malformed; |
3c567a52 | 1056 | } |
75b2920a | 1057 | |
3c567a52 HL |
1058 | if (!ossl_quic_wire_decode_transport_param_cid(&pkt, NULL, &cid)) { |
1059 | reason = TP_REASON_MALFORMED("ORIG_DCID"); | |
75b2920a | 1060 | goto malformed; |
3c567a52 | 1061 | } |
75b2920a HL |
1062 | |
1063 | /* Must match our initial DCID. */ | |
3c567a52 HL |
1064 | if (!ossl_quic_conn_id_eq(&ch->init_dcid, &cid)) { |
1065 | reason = TP_REASON_EXPECTED_VALUE("ORIG_DCID"); | |
75b2920a | 1066 | goto malformed; |
3c567a52 | 1067 | } |
75b2920a HL |
1068 | |
1069 | got_orig_dcid = 1; | |
1070 | break; | |
1071 | ||
1072 | case QUIC_TPARAM_RETRY_SCID: | |
3c567a52 HL |
1073 | if (ch->is_server) { |
1074 | reason = TP_REASON_SERVER_ONLY("RETRY_SCID"); | |
1075 | goto malformed; | |
1076 | } | |
1077 | ||
1078 | if (got_retry_scid) { | |
1079 | reason = TP_REASON_DUP("RETRY_SCID"); | |
75b2920a | 1080 | goto malformed; |
3c567a52 HL |
1081 | } |
1082 | ||
1083 | if (!ch->doing_retry) { | |
1084 | reason = TP_REASON_NOT_RETRY("RETRY_SCID"); | |
1085 | goto malformed; | |
1086 | } | |
75b2920a | 1087 | |
3c567a52 HL |
1088 | if (!ossl_quic_wire_decode_transport_param_cid(&pkt, NULL, &cid)) { |
1089 | reason = TP_REASON_MALFORMED("RETRY_SCID"); | |
75b2920a | 1090 | goto malformed; |
3c567a52 | 1091 | } |
75b2920a HL |
1092 | |
1093 | /* Must match Retry packet SCID. */ | |
3c567a52 HL |
1094 | if (!ossl_quic_conn_id_eq(&ch->retry_scid, &cid)) { |
1095 | reason = TP_REASON_EXPECTED_VALUE("RETRY_SCID"); | |
75b2920a | 1096 | goto malformed; |
3c567a52 | 1097 | } |
75b2920a HL |
1098 | |
1099 | got_retry_scid = 1; | |
1100 | break; | |
1101 | ||
1102 | case QUIC_TPARAM_INITIAL_SCID: | |
3c567a52 | 1103 | if (got_initial_scid) { |
75b2920a | 1104 | /* must not appear more than once */ |
3c567a52 | 1105 | reason = TP_REASON_DUP("INITIAL_SCID"); |
75b2920a | 1106 | goto malformed; |
3c567a52 | 1107 | } |
75b2920a | 1108 | |
3c567a52 HL |
1109 | if (!ossl_quic_wire_decode_transport_param_cid(&pkt, NULL, &cid)) { |
1110 | reason = TP_REASON_MALFORMED("INITIAL_SCID"); | |
75b2920a | 1111 | goto malformed; |
3c567a52 | 1112 | } |
75b2920a HL |
1113 | |
1114 | /* Must match SCID of first Initial packet from server. */ | |
3c567a52 HL |
1115 | if (!ossl_quic_conn_id_eq(&ch->init_scid, &cid)) { |
1116 | reason = TP_REASON_EXPECTED_VALUE("INITIAL_SCID"); | |
75b2920a | 1117 | goto malformed; |
3c567a52 | 1118 | } |
75b2920a HL |
1119 | |
1120 | got_initial_scid = 1; | |
1121 | break; | |
1122 | ||
1123 | case QUIC_TPARAM_INITIAL_MAX_DATA: | |
3c567a52 | 1124 | if (got_initial_max_data) { |
75b2920a | 1125 | /* must not appear more than once */ |
3c567a52 | 1126 | reason = TP_REASON_DUP("INITIAL_MAX_DATA"); |
75b2920a | 1127 | goto malformed; |
3c567a52 | 1128 | } |
75b2920a | 1129 | |
3c567a52 HL |
1130 | if (!ossl_quic_wire_decode_transport_param_int(&pkt, &id, &v)) { |
1131 | reason = TP_REASON_MALFORMED("INITIAL_MAX_DATA"); | |
75b2920a | 1132 | goto malformed; |
3c567a52 | 1133 | } |
75b2920a HL |
1134 | |
1135 | ossl_quic_txfc_bump_cwm(&ch->conn_txfc, v); | |
1136 | got_initial_max_data = 1; | |
1137 | break; | |
1138 | ||
1139 | case QUIC_TPARAM_INITIAL_MAX_STREAM_DATA_BIDI_LOCAL: | |
3c567a52 | 1140 | if (got_initial_max_stream_data_bidi_local) { |
75b2920a | 1141 | /* must not appear more than once */ |
3c567a52 | 1142 | reason = TP_REASON_DUP("INITIAL_MAX_STREAM_DATA_BIDI_LOCAL"); |
75b2920a | 1143 | goto malformed; |
3c567a52 | 1144 | } |
75b2920a | 1145 | |
3c567a52 HL |
1146 | if (!ossl_quic_wire_decode_transport_param_int(&pkt, &id, &v)) { |
1147 | reason = TP_REASON_MALFORMED("INITIAL_MAX_STREAM_DATA_BIDI_LOCAL"); | |
75b2920a | 1148 | goto malformed; |
3c567a52 | 1149 | } |
f538b421 HL |
1150 | |
1151 | /* | |
75b2920a HL |
1152 | * This is correct; the BIDI_LOCAL TP governs streams created by |
1153 | * the endpoint which sends the TP, i.e., our peer. | |
f538b421 | 1154 | */ |
54562e89 | 1155 | ch->rx_init_max_stream_data_bidi_remote = v; |
75b2920a HL |
1156 | got_initial_max_stream_data_bidi_local = 1; |
1157 | break; | |
1158 | ||
1159 | case QUIC_TPARAM_INITIAL_MAX_STREAM_DATA_BIDI_REMOTE: | |
3c567a52 | 1160 | if (got_initial_max_stream_data_bidi_remote) { |
75b2920a | 1161 | /* must not appear more than once */ |
3c567a52 | 1162 | reason = TP_REASON_DUP("INITIAL_MAX_STREAM_DATA_BIDI_REMOTE"); |
75b2920a | 1163 | goto malformed; |
3c567a52 | 1164 | } |
75b2920a | 1165 | |
3c567a52 HL |
1166 | if (!ossl_quic_wire_decode_transport_param_int(&pkt, &id, &v)) { |
1167 | reason = TP_REASON_MALFORMED("INITIAL_MAX_STREAM_DATA_BIDI_REMOTE"); | |
75b2920a | 1168 | goto malformed; |
3c567a52 | 1169 | } |
75b2920a HL |
1170 | |
1171 | /* | |
1172 | * This is correct; the BIDI_REMOTE TP governs streams created | |
1173 | * by the endpoint which receives the TP, i.e., us. | |
1174 | */ | |
54562e89 | 1175 | ch->rx_init_max_stream_data_bidi_local = v; |
75b2920a | 1176 | |
26ad16ea HL |
1177 | /* Apply to all existing streams. */ |
1178 | ossl_quic_stream_map_visit(&ch->qsm, txfc_bump_cwm_bidi, &v); | |
75b2920a HL |
1179 | got_initial_max_stream_data_bidi_remote = 1; |
1180 | break; | |
1181 | ||
1182 | case QUIC_TPARAM_INITIAL_MAX_STREAM_DATA_UNI: | |
3c567a52 | 1183 | if (got_initial_max_stream_data_uni) { |
75b2920a | 1184 | /* must not appear more than once */ |
3c567a52 | 1185 | reason = TP_REASON_DUP("INITIAL_MAX_STREAM_DATA_UNI"); |
75b2920a | 1186 | goto malformed; |
3c567a52 | 1187 | } |
75b2920a | 1188 | |
3c567a52 HL |
1189 | if (!ossl_quic_wire_decode_transport_param_int(&pkt, &id, &v)) { |
1190 | reason = TP_REASON_MALFORMED("INITIAL_MAX_STREAM_DATA_UNI"); | |
75b2920a | 1191 | goto malformed; |
3c567a52 | 1192 | } |
75b2920a | 1193 | |
e8fe7a21 | 1194 | ch->rx_init_max_stream_data_uni = v; |
26ad16ea HL |
1195 | |
1196 | /* Apply to all existing streams. */ | |
1197 | ossl_quic_stream_map_visit(&ch->qsm, txfc_bump_cwm_uni, &v); | |
75b2920a HL |
1198 | got_initial_max_stream_data_uni = 1; |
1199 | break; | |
1200 | ||
1201 | case QUIC_TPARAM_ACK_DELAY_EXP: | |
3c567a52 | 1202 | if (got_ack_delay_exp) { |
75b2920a | 1203 | /* must not appear more than once */ |
3c567a52 | 1204 | reason = TP_REASON_DUP("ACK_DELAY_EXP"); |
75b2920a | 1205 | goto malformed; |
3c567a52 | 1206 | } |
75b2920a HL |
1207 | |
1208 | if (!ossl_quic_wire_decode_transport_param_int(&pkt, &id, &v) | |
3c567a52 HL |
1209 | || v > QUIC_MAX_ACK_DELAY_EXP) { |
1210 | reason = TP_REASON_MALFORMED("ACK_DELAY_EXP"); | |
75b2920a | 1211 | goto malformed; |
3c567a52 | 1212 | } |
75b2920a HL |
1213 | |
1214 | ch->rx_ack_delay_exp = (unsigned char)v; | |
1215 | got_ack_delay_exp = 1; | |
1216 | break; | |
1217 | ||
1218 | case QUIC_TPARAM_MAX_ACK_DELAY: | |
3c567a52 | 1219 | if (got_max_ack_delay) { |
75b2920a | 1220 | /* must not appear more than once */ |
3c567a52 | 1221 | reason = TP_REASON_DUP("MAX_ACK_DELAY"); |
75b2920a | 1222 | return 0; |
3c567a52 | 1223 | } |
75b2920a HL |
1224 | |
1225 | if (!ossl_quic_wire_decode_transport_param_int(&pkt, &id, &v) | |
3c567a52 HL |
1226 | || v >= (((uint64_t)1) << 14)) { |
1227 | reason = TP_REASON_MALFORMED("MAX_ACK_DELAY"); | |
75b2920a | 1228 | goto malformed; |
3c567a52 | 1229 | } |
75b2920a HL |
1230 | |
1231 | ch->rx_max_ack_delay = v; | |
1232 | got_max_ack_delay = 1; | |
1233 | break; | |
1234 | ||
1235 | case QUIC_TPARAM_INITIAL_MAX_STREAMS_BIDI: | |
3c567a52 | 1236 | if (got_initial_max_streams_bidi) { |
75b2920a | 1237 | /* must not appear more than once */ |
3c567a52 | 1238 | reason = TP_REASON_DUP("INITIAL_MAX_STREAMS_BIDI"); |
75b2920a | 1239 | return 0; |
3c567a52 | 1240 | } |
75b2920a HL |
1241 | |
1242 | if (!ossl_quic_wire_decode_transport_param_int(&pkt, &id, &v) | |
3c567a52 HL |
1243 | || v > (((uint64_t)1) << 60)) { |
1244 | reason = TP_REASON_MALFORMED("INITIAL_MAX_STREAMS_BIDI"); | |
75b2920a | 1245 | goto malformed; |
3c567a52 | 1246 | } |
75b2920a HL |
1247 | |
1248 | assert(ch->max_local_streams_bidi == 0); | |
1249 | ch->max_local_streams_bidi = v; | |
1250 | got_initial_max_streams_bidi = 1; | |
1251 | break; | |
1252 | ||
1253 | case QUIC_TPARAM_INITIAL_MAX_STREAMS_UNI: | |
3c567a52 | 1254 | if (got_initial_max_streams_uni) { |
75b2920a | 1255 | /* must not appear more than once */ |
3c567a52 | 1256 | reason = TP_REASON_DUP("INITIAL_MAX_STREAMS_UNI"); |
75b2920a | 1257 | goto malformed; |
3c567a52 | 1258 | } |
75b2920a HL |
1259 | |
1260 | if (!ossl_quic_wire_decode_transport_param_int(&pkt, &id, &v) | |
3c567a52 HL |
1261 | || v > (((uint64_t)1) << 60)) { |
1262 | reason = TP_REASON_MALFORMED("INITIAL_MAX_STREAMS_UNI"); | |
75b2920a | 1263 | goto malformed; |
3c567a52 | 1264 | } |
75b2920a HL |
1265 | |
1266 | assert(ch->max_local_streams_uni == 0); | |
1267 | ch->max_local_streams_uni = v; | |
1268 | got_initial_max_streams_uni = 1; | |
1269 | break; | |
1270 | ||
1271 | case QUIC_TPARAM_MAX_IDLE_TIMEOUT: | |
3c567a52 | 1272 | if (got_max_idle_timeout) { |
75b2920a | 1273 | /* must not appear more than once */ |
3c567a52 | 1274 | reason = TP_REASON_DUP("MAX_IDLE_TIMEOUT"); |
75b2920a | 1275 | goto malformed; |
3c567a52 | 1276 | } |
75b2920a | 1277 | |
3c567a52 HL |
1278 | if (!ossl_quic_wire_decode_transport_param_int(&pkt, &id, &v)) { |
1279 | reason = TP_REASON_MALFORMED("MAX_IDLE_TIMEOUT"); | |
75b2920a | 1280 | goto malformed; |
3c567a52 | 1281 | } |
75b2920a | 1282 | |
4648eac5 | 1283 | if (v > 0 && v < ch->max_idle_timeout) |
75b2920a HL |
1284 | ch->max_idle_timeout = v; |
1285 | ||
1286 | ch_update_idle(ch); | |
1287 | got_max_idle_timeout = 1; | |
1288 | break; | |
f538b421 | 1289 | |
75b2920a | 1290 | case QUIC_TPARAM_MAX_UDP_PAYLOAD_SIZE: |
3c567a52 | 1291 | if (got_max_udp_payload_size) { |
75b2920a | 1292 | /* must not appear more than once */ |
3c567a52 | 1293 | reason = TP_REASON_DUP("MAX_UDP_PAYLOAD_SIZE"); |
75b2920a | 1294 | goto malformed; |
3c567a52 | 1295 | } |
f538b421 | 1296 | |
75b2920a | 1297 | if (!ossl_quic_wire_decode_transport_param_int(&pkt, &id, &v) |
3c567a52 HL |
1298 | || v < QUIC_MIN_INITIAL_DGRAM_LEN) { |
1299 | reason = TP_REASON_MALFORMED("MAX_UDP_PAYLOAD_SIZE"); | |
75b2920a | 1300 | goto malformed; |
3c567a52 | 1301 | } |
75b2920a HL |
1302 | |
1303 | ch->rx_max_udp_payload_size = v; | |
1304 | got_max_udp_payload_size = 1; | |
1305 | break; | |
1306 | ||
1307 | case QUIC_TPARAM_ACTIVE_CONN_ID_LIMIT: | |
3c567a52 | 1308 | if (got_active_conn_id_limit) { |
75b2920a | 1309 | /* must not appear more than once */ |
3c567a52 | 1310 | reason = TP_REASON_DUP("ACTIVE_CONN_ID_LIMIT"); |
75b2920a | 1311 | goto malformed; |
3c567a52 | 1312 | } |
75b2920a HL |
1313 | |
1314 | if (!ossl_quic_wire_decode_transport_param_int(&pkt, &id, &v) | |
3c567a52 HL |
1315 | || v < QUIC_MIN_ACTIVE_CONN_ID_LIMIT) { |
1316 | reason = TP_REASON_MALFORMED("ACTIVE_CONN_ID_LIMIT"); | |
75b2920a | 1317 | goto malformed; |
3c567a52 | 1318 | } |
75b2920a HL |
1319 | |
1320 | ch->rx_active_conn_id_limit = v; | |
1321 | got_active_conn_id_limit = 1; | |
1322 | break; | |
1323 | ||
3c567a52 HL |
1324 | case QUIC_TPARAM_STATELESS_RESET_TOKEN: |
1325 | /* TODO(QUIC): Handle stateless reset tokens. */ | |
1326 | /* | |
1327 | * We ignore these for now, but we must ensure a client doesn't | |
1328 | * send them. | |
1329 | */ | |
1330 | if (ch->is_server) { | |
1331 | reason = TP_REASON_SERVER_ONLY("STATELESS_RESET_TOKEN"); | |
1332 | goto malformed; | |
1333 | } | |
1334 | ||
1335 | body = ossl_quic_wire_decode_transport_param_bytes(&pkt, &id, &len); | |
1336 | if (body == NULL || len != QUIC_STATELESS_RESET_TOKEN_LEN) { | |
1337 | reason = TP_REASON_MALFORMED("STATELESS_RESET_TOKEN"); | |
1338 | goto malformed; | |
1339 | } | |
1340 | ||
1341 | break; | |
1342 | ||
1343 | case QUIC_TPARAM_PREFERRED_ADDR: | |
1344 | /* TODO(QUIC): Handle preferred address. */ | |
1345 | if (ch->is_server) { | |
1346 | reason = TP_REASON_SERVER_ONLY("PREFERRED_ADDR"); | |
1347 | goto malformed; | |
1348 | } | |
1349 | ||
1350 | body = ossl_quic_wire_decode_transport_param_bytes(&pkt, &id, &len); | |
1351 | if (body == NULL) { | |
1352 | reason = TP_REASON_MALFORMED("PREFERRED_ADDR"); | |
1353 | goto malformed; | |
1354 | } | |
1355 | ||
1356 | break; | |
75b2920a HL |
1357 | |
1358 | case QUIC_TPARAM_DISABLE_ACTIVE_MIGRATION: | |
1359 | /* We do not currently handle migration, so nothing to do. */ | |
1360 | default: | |
1361 | /* Skip over and ignore. */ | |
1362 | body = ossl_quic_wire_decode_transport_param_bytes(&pkt, &id, | |
1363 | &len); | |
1364 | if (body == NULL) | |
1365 | goto malformed; | |
1366 | ||
1367 | break; | |
f538b421 HL |
1368 | } |
1369 | } | |
1370 | ||
3c567a52 HL |
1371 | if (!got_initial_scid) { |
1372 | reason = TP_REASON_REQUIRED("INITIAL_SCID"); | |
f538b421 | 1373 | goto malformed; |
3c567a52 HL |
1374 | } |
1375 | ||
1376 | if (!ch->is_server) { | |
1377 | if (!got_orig_dcid) { | |
1378 | reason = TP_REASON_REQUIRED("ORIG_DCID"); | |
1379 | goto malformed; | |
1380 | } | |
1381 | ||
1382 | if (ch->doing_retry && !got_retry_scid) { | |
1383 | reason = TP_REASON_REQUIRED("RETRY_SCID"); | |
1384 | goto malformed; | |
1385 | } | |
1386 | } | |
f538b421 HL |
1387 | |
1388 | ch->got_remote_transport_params = 1; | |
1389 | ||
1390 | if (got_initial_max_data || got_initial_max_stream_data_bidi_remote | |
1391 | || got_initial_max_streams_bidi || got_initial_max_streams_uni) | |
26ad16ea HL |
1392 | /* |
1393 | * If FC credit was bumped, we may now be able to send. Update all | |
1394 | * streams. | |
1395 | */ | |
1396 | ossl_quic_stream_map_visit(&ch->qsm, do_update, ch); | |
f538b421 HL |
1397 | |
1398 | /* If we are a server, we now generate our own transport parameters. */ | |
1399 | if (ch->is_server && !ch_generate_transport_params(ch)) { | |
1400 | ossl_quic_channel_raise_protocol_error(ch, QUIC_ERR_INTERNAL_ERROR, 0, | |
1401 | "internal error"); | |
1402 | return 0; | |
1403 | } | |
1404 | ||
1405 | return 1; | |
1406 | ||
1407 | malformed: | |
1408 | ossl_quic_channel_raise_protocol_error(ch, QUIC_ERR_TRANSPORT_PARAMETER_ERROR, | |
3c567a52 | 1409 | 0, reason); |
f538b421 HL |
1410 | return 0; |
1411 | } | |
1412 | ||
1413 | /* | |
1414 | * Called when we want to generate transport parameters. This is called | |
1415 | * immediately at instantiation time for a client and after we receive the | |
1416 | * client's transport parameters for a server. | |
1417 | */ | |
1418 | static int ch_generate_transport_params(QUIC_CHANNEL *ch) | |
1419 | { | |
1420 | int ok = 0; | |
1421 | BUF_MEM *buf_mem = NULL; | |
1422 | WPACKET wpkt; | |
1423 | int wpkt_valid = 0; | |
1424 | size_t buf_len = 0; | |
1425 | ||
1426 | if (ch->local_transport_params != NULL) | |
1427 | goto err; | |
1428 | ||
1429 | if ((buf_mem = BUF_MEM_new()) == NULL) | |
1430 | goto err; | |
1431 | ||
1432 | if (!WPACKET_init(&wpkt, buf_mem)) | |
1433 | goto err; | |
1434 | ||
1435 | wpkt_valid = 1; | |
1436 | ||
1437 | if (ossl_quic_wire_encode_transport_param_bytes(&wpkt, QUIC_TPARAM_DISABLE_ACTIVE_MIGRATION, | |
1438 | NULL, 0) == NULL) | |
1439 | goto err; | |
1440 | ||
3c567a52 HL |
1441 | if (ch->is_server) { |
1442 | if (!ossl_quic_wire_encode_transport_param_cid(&wpkt, QUIC_TPARAM_ORIG_DCID, | |
1443 | &ch->init_dcid)) | |
1444 | goto err; | |
1445 | ||
1446 | if (!ossl_quic_wire_encode_transport_param_cid(&wpkt, QUIC_TPARAM_INITIAL_SCID, | |
bbc97540 | 1447 | &ch->cur_local_cid)) |
3c567a52 HL |
1448 | goto err; |
1449 | } else { | |
1450 | /* Client always uses an empty SCID. */ | |
1451 | if (ossl_quic_wire_encode_transport_param_bytes(&wpkt, QUIC_TPARAM_INITIAL_SCID, | |
1452 | NULL, 0) == NULL) | |
1453 | goto err; | |
1454 | } | |
f538b421 HL |
1455 | |
1456 | if (!ossl_quic_wire_encode_transport_param_int(&wpkt, QUIC_TPARAM_MAX_IDLE_TIMEOUT, | |
1457 | ch->max_idle_timeout)) | |
1458 | goto err; | |
1459 | ||
1460 | if (!ossl_quic_wire_encode_transport_param_int(&wpkt, QUIC_TPARAM_MAX_UDP_PAYLOAD_SIZE, | |
1461 | QUIC_MIN_INITIAL_DGRAM_LEN)) | |
1462 | goto err; | |
1463 | ||
1464 | if (!ossl_quic_wire_encode_transport_param_int(&wpkt, QUIC_TPARAM_ACTIVE_CONN_ID_LIMIT, | |
eff04652 | 1465 | 2)) |
f538b421 HL |
1466 | goto err; |
1467 | ||
1468 | if (!ossl_quic_wire_encode_transport_param_int(&wpkt, QUIC_TPARAM_INITIAL_MAX_DATA, | |
1469 | ossl_quic_rxfc_get_cwm(&ch->conn_rxfc))) | |
1470 | goto err; | |
1471 | ||
0815b725 | 1472 | /* Send the default CWM for a new RXFC. */ |
f538b421 | 1473 | if (!ossl_quic_wire_encode_transport_param_int(&wpkt, QUIC_TPARAM_INITIAL_MAX_STREAM_DATA_BIDI_LOCAL, |
0815b725 | 1474 | ch->tx_init_max_stream_data_bidi_local)) |
f538b421 HL |
1475 | goto err; |
1476 | ||
1477 | if (!ossl_quic_wire_encode_transport_param_int(&wpkt, QUIC_TPARAM_INITIAL_MAX_STREAM_DATA_BIDI_REMOTE, | |
0815b725 | 1478 | ch->tx_init_max_stream_data_bidi_remote)) |
f538b421 HL |
1479 | goto err; |
1480 | ||
1481 | if (!ossl_quic_wire_encode_transport_param_int(&wpkt, QUIC_TPARAM_INITIAL_MAX_STREAM_DATA_UNI, | |
0815b725 | 1482 | ch->tx_init_max_stream_data_uni)) |
f538b421 HL |
1483 | goto err; |
1484 | ||
1485 | if (!ossl_quic_wire_encode_transport_param_int(&wpkt, QUIC_TPARAM_INITIAL_MAX_STREAMS_BIDI, | |
a6b6ea17 | 1486 | ossl_quic_rxfc_get_cwm(&ch->max_streams_bidi_rxfc))) |
f538b421 HL |
1487 | goto err; |
1488 | ||
1489 | if (!ossl_quic_wire_encode_transport_param_int(&wpkt, QUIC_TPARAM_INITIAL_MAX_STREAMS_UNI, | |
a6b6ea17 | 1490 | ossl_quic_rxfc_get_cwm(&ch->max_streams_uni_rxfc))) |
f538b421 HL |
1491 | goto err; |
1492 | ||
eff04652 TM |
1493 | if (!WPACKET_finish(&wpkt)) |
1494 | goto err; | |
1495 | ||
1496 | wpkt_valid = 0; | |
1497 | ||
f538b421 HL |
1498 | if (!WPACKET_get_total_written(&wpkt, &buf_len)) |
1499 | goto err; | |
1500 | ||
1501 | ch->local_transport_params = (unsigned char *)buf_mem->data; | |
1502 | buf_mem->data = NULL; | |
1503 | ||
f538b421 | 1504 | |
2723d705 | 1505 | if (!ossl_quic_tls_set_transport_params(ch->qtls, ch->local_transport_params, |
f538b421 HL |
1506 | buf_len)) |
1507 | goto err; | |
1508 | ||
1509 | ok = 1; | |
1510 | err: | |
1511 | if (wpkt_valid) | |
1512 | WPACKET_cleanup(&wpkt); | |
1513 | BUF_MEM_free(buf_mem); | |
1514 | return ok; | |
1515 | } | |
1516 | ||
1517 | /* | |
1518 | * QUIC Channel: Ticker-Mutator | |
1519 | * ============================ | |
1520 | */ | |
1521 | ||
1522 | /* | |
1523 | * The central ticker function called by the reactor. This does everything, or | |
1524 | * at least everything network I/O related. Best effort - not allowed to fail | |
1525 | * "loudly". | |
1526 | */ | |
ccd31037 | 1527 | static void ch_tick(QUIC_TICK_RESULT *res, void *arg, uint32_t flags) |
f538b421 HL |
1528 | { |
1529 | OSSL_TIME now, deadline; | |
1530 | QUIC_CHANNEL *ch = arg; | |
9cf091a3 | 1531 | int channel_only = (flags & QUIC_REACTOR_TICK_FLAG_CHANNEL_ONLY) != 0; |
f538b421 HL |
1532 | |
1533 | /* | |
1534 | * When we tick the QUIC connection, we do everything we need to do | |
1535 | * periodically. In order, we: | |
1536 | * | |
1537 | * - handle any incoming data from the network; | |
1538 | * - handle any timer events which are due to fire (ACKM, etc.) | |
1539 | * - write any data to the network due to be sent, to the extent | |
1540 | * possible; | |
1541 | * - determine the time at which we should next be ticked. | |
1542 | */ | |
1543 | ||
1544 | /* If we are in the TERMINATED state, there is nothing to do. */ | |
c12e1113 | 1545 | if (ossl_quic_channel_is_terminated(ch)) { |
b639475a HL |
1546 | res->net_read_desired = 0; |
1547 | res->net_write_desired = 0; | |
1548 | res->tick_deadline = ossl_time_infinite(); | |
f538b421 HL |
1549 | return; |
1550 | } | |
1551 | ||
1552 | /* | |
1553 | * If we are in the TERMINATING state, check if the terminating timer has | |
1554 | * expired. | |
1555 | */ | |
c12e1113 | 1556 | if (ossl_quic_channel_is_terminating(ch)) { |
b212d554 | 1557 | now = get_time(ch); |
f538b421 HL |
1558 | |
1559 | if (ossl_time_compare(now, ch->terminate_deadline) >= 0) { | |
1560 | ch_on_terminating_timeout(ch); | |
b639475a HL |
1561 | res->net_read_desired = 0; |
1562 | res->net_write_desired = 0; | |
1563 | res->tick_deadline = ossl_time_infinite(); | |
f538b421 HL |
1564 | return; /* abort normal processing, nothing to do */ |
1565 | } | |
1566 | } | |
1567 | ||
8a65e7a5 HL |
1568 | /* Handle RXKU timeouts. */ |
1569 | ch_rxku_tick(ch); | |
1570 | ||
3bf4dc8c HL |
1571 | /* Handle any incoming data from network. */ |
1572 | ch_rx_pre(ch); | |
1573 | ||
4e64437a | 1574 | do { |
3bf4dc8c | 1575 | /* Process queued incoming packets. */ |
4e64437a | 1576 | ch_rx(ch); |
f538b421 | 1577 | |
4e64437a HL |
1578 | /* |
1579 | * Allow the handshake layer to check for any new incoming data and generate | |
1580 | * new outgoing data. | |
1581 | */ | |
92282a17 | 1582 | ch->have_new_rx_secret = 0; |
ccd31037 HL |
1583 | if (!channel_only) |
1584 | ossl_quic_tls_tick(ch->qtls); | |
4e64437a HL |
1585 | |
1586 | /* | |
1587 | * If the handshake layer gave us a new secret, we need to do RX again | |
1588 | * because packets that were not previously processable and were | |
1589 | * deferred might now be processable. | |
9f0ade7c HL |
1590 | * |
1591 | * TODO(QUIC): Consider handling this in the yield_secret callback. | |
4e64437a | 1592 | */ |
92282a17 | 1593 | } while (ch->have_new_rx_secret); |
f538b421 HL |
1594 | |
1595 | /* | |
1596 | * Handle any timer events which are due to fire; namely, the loss detection | |
1597 | * deadline and the idle timeout. | |
1598 | * | |
1599 | * ACKM ACK generation deadline is polled by TXP, so we don't need to handle | |
1600 | * it here. | |
1601 | */ | |
b212d554 | 1602 | now = get_time(ch); |
f538b421 HL |
1603 | if (ossl_time_compare(now, ch->idle_deadline) >= 0) { |
1604 | /* | |
1605 | * Idle timeout differs from normal protocol violation because we do not | |
1606 | * send a CONN_CLOSE frame; go straight to TERMINATED. | |
1607 | */ | |
1608 | ch_on_idle_timeout(ch); | |
b639475a HL |
1609 | res->net_read_desired = 0; |
1610 | res->net_write_desired = 0; | |
1611 | res->tick_deadline = ossl_time_infinite(); | |
f538b421 HL |
1612 | return; |
1613 | } | |
1614 | ||
1615 | deadline = ossl_ackm_get_loss_detection_deadline(ch->ackm); | |
1616 | if (!ossl_time_is_zero(deadline) && ossl_time_compare(now, deadline) >= 0) | |
1617 | ossl_ackm_on_timeout(ch->ackm); | |
1618 | ||
3b1ab5a3 HL |
1619 | /* If a ping is due, inform TXP. */ |
1620 | if (ossl_time_compare(now, ch->ping_deadline) >= 0) { | |
1621 | int pn_space = ossl_quic_enc_level_to_pn_space(ch->tx_enc_level); | |
1622 | ||
1623 | ossl_quic_tx_packetiser_schedule_ack_eliciting(ch->txp, pn_space); | |
1624 | } | |
1625 | ||
f538b421 HL |
1626 | /* Write any data to the network due to be sent. */ |
1627 | ch_tx(ch); | |
1628 | ||
0847e63e HL |
1629 | /* Do stream GC. */ |
1630 | ossl_quic_stream_map_gc(&ch->qsm); | |
1631 | ||
f538b421 HL |
1632 | /* Determine the time at which we should next be ticked. */ |
1633 | res->tick_deadline = ch_determine_next_tick_deadline(ch); | |
1634 | ||
df15e990 HL |
1635 | /* |
1636 | * Always process network input unless we are now terminated. | |
1637 | * Although we had not terminated at the beginning of this tick, network | |
1638 | * errors in ch_rx_pre() or ch_tx() may have caused us to transition to the | |
1639 | * Terminated state. | |
1640 | */ | |
c12e1113 | 1641 | res->net_read_desired = !ossl_quic_channel_is_terminated(ch); |
f538b421 HL |
1642 | |
1643 | /* We want to write to the network if we have any in our queue. */ | |
b639475a | 1644 | res->net_write_desired |
c12e1113 | 1645 | = (!ossl_quic_channel_is_terminated(ch) |
df15e990 | 1646 | && ossl_qtx_get_queue_len_datagrams(ch->qtx) > 0); |
f538b421 HL |
1647 | } |
1648 | ||
3bf4dc8c HL |
1649 | /* Process incoming datagrams, if any. */ |
1650 | static void ch_rx_pre(QUIC_CHANNEL *ch) | |
1651 | { | |
df15e990 HL |
1652 | int ret; |
1653 | ||
b1b06da2 | 1654 | if (!ch->is_server && !ch->have_sent_any_pkt) |
3bf4dc8c HL |
1655 | return; |
1656 | ||
1657 | /* | |
1658 | * Get DEMUX to BIO_recvmmsg from the network and queue incoming datagrams | |
1659 | * to the appropriate QRX instance. | |
1660 | */ | |
df15e990 HL |
1661 | ret = ossl_quic_demux_pump(ch->demux); |
1662 | if (ret == QUIC_DEMUX_PUMP_RES_PERMANENT_FAIL) | |
1663 | /* | |
1664 | * We don't care about transient failure, but permanent failure means we | |
1665 | * should tear down the connection as though a protocol violation | |
1666 | * occurred. Skip straight to the Terminating state as there is no point | |
1667 | * trying to send CONNECTION_CLOSE frames if the network BIO is not | |
1668 | * operating correctly. | |
1669 | */ | |
1670 | ch_raise_net_error(ch); | |
3bf4dc8c HL |
1671 | } |
1672 | ||
48120ea5 HL |
1673 | /* Check incoming forged packet limit and terminate connection if needed. */ |
1674 | static void ch_rx_check_forged_pkt_limit(QUIC_CHANNEL *ch) | |
1675 | { | |
1676 | uint32_t enc_level; | |
1677 | uint64_t limit = UINT64_MAX, l; | |
1678 | ||
1679 | for (enc_level = QUIC_ENC_LEVEL_INITIAL; | |
1680 | enc_level < QUIC_ENC_LEVEL_NUM; | |
1681 | ++enc_level) | |
1682 | { | |
1683 | /* | |
1684 | * Different ELs can have different AEADs which can in turn impose | |
1685 | * different limits, so use the lowest value of any currently valid EL. | |
1686 | */ | |
1687 | if ((ch->el_discarded & (1U << enc_level)) != 0) | |
1688 | continue; | |
1689 | ||
1690 | if (enc_level > ch->rx_enc_level) | |
1691 | break; | |
1692 | ||
1693 | l = ossl_qrx_get_max_forged_pkt_count(ch->qrx, enc_level); | |
1694 | if (l < limit) | |
1695 | limit = l; | |
1696 | } | |
1697 | ||
1698 | if (ossl_qrx_get_cur_forged_pkt_count(ch->qrx) < limit) | |
1699 | return; | |
1700 | ||
1701 | ossl_quic_channel_raise_protocol_error(ch, QUIC_ERR_AEAD_LIMIT_REACHED, 0, | |
1702 | "forgery limit"); | |
1703 | } | |
1704 | ||
3bf4dc8c | 1705 | /* Process queued incoming packets and handle frames, if any. */ |
f538b421 HL |
1706 | static int ch_rx(QUIC_CHANNEL *ch) |
1707 | { | |
1708 | int handled_any = 0; | |
1709 | ||
b1b06da2 | 1710 | if (!ch->is_server && !ch->have_sent_any_pkt) |
f538b421 HL |
1711 | /* |
1712 | * We have not sent anything yet, therefore there is no need to check | |
75b2920a | 1713 | * for incoming data. |
f538b421 HL |
1714 | */ |
1715 | return 1; | |
1716 | ||
f538b421 HL |
1717 | for (;;) { |
1718 | assert(ch->qrx_pkt == NULL); | |
1719 | ||
1720 | if (!ossl_qrx_read_pkt(ch->qrx, &ch->qrx_pkt)) | |
1721 | break; | |
1722 | ||
1723 | if (!handled_any) | |
1724 | ch_update_idle(ch); | |
1725 | ||
1726 | ch_rx_handle_packet(ch); /* best effort */ | |
1727 | ||
1728 | /* | |
1729 | * Regardless of the outcome of frame handling, unref the packet. | |
1730 | * This will free the packet unless something added another | |
1731 | * reference to it during frame processing. | |
1732 | */ | |
1733 | ossl_qrx_pkt_release(ch->qrx_pkt); | |
1734 | ch->qrx_pkt = NULL; | |
1735 | ||
3b1ab5a3 | 1736 | ch->have_sent_ack_eliciting_since_rx = 0; |
f538b421 HL |
1737 | handled_any = 1; |
1738 | } | |
1739 | ||
48120ea5 HL |
1740 | ch_rx_check_forged_pkt_limit(ch); |
1741 | ||
f538b421 HL |
1742 | /* |
1743 | * When in TERMINATING - CLOSING, generate a CONN_CLOSE frame whenever we | |
1744 | * process one or more incoming packets. | |
1745 | */ | |
1746 | if (handled_any && ch->state == QUIC_CHANNEL_STATE_TERMINATING_CLOSING) | |
1747 | ch->conn_close_queued = 1; | |
1748 | ||
1749 | return 1; | |
1750 | } | |
1751 | ||
1752 | /* Handles the packet currently in ch->qrx_pkt->hdr. */ | |
1753 | static void ch_rx_handle_packet(QUIC_CHANNEL *ch) | |
1754 | { | |
1755 | uint32_t enc_level; | |
1756 | ||
1757 | assert(ch->qrx_pkt != NULL); | |
1758 | ||
1759 | if (ossl_quic_pkt_type_is_encrypted(ch->qrx_pkt->hdr->type)) { | |
1760 | if (!ch->have_received_enc_pkt) { | |
eff04652 | 1761 | ch->cur_remote_dcid = ch->init_scid = ch->qrx_pkt->hdr->src_conn_id; |
f538b421 HL |
1762 | ch->have_received_enc_pkt = 1; |
1763 | ||
1764 | /* | |
1765 | * We change to using the SCID in the first Initial packet as the | |
1766 | * DCID. | |
1767 | */ | |
1768 | ossl_quic_tx_packetiser_set_cur_dcid(ch->txp, &ch->init_scid); | |
1769 | } | |
1770 | ||
1771 | enc_level = ossl_quic_pkt_type_to_enc_level(ch->qrx_pkt->hdr->type); | |
1772 | if ((ch->el_discarded & (1U << enc_level)) != 0) | |
1773 | /* Do not process packets from ELs we have already discarded. */ | |
1774 | return; | |
1775 | } | |
1776 | ||
1777 | /* Handle incoming packet. */ | |
1778 | switch (ch->qrx_pkt->hdr->type) { | |
75b2920a | 1779 | case QUIC_PKT_TYPE_RETRY: |
b1b06da2 | 1780 | if (ch->doing_retry || ch->is_server) |
75b2920a HL |
1781 | /* |
1782 | * It is not allowed to ask a client to do a retry more than | |
b1b06da2 | 1783 | * once. Clients may not send retries. |
75b2920a HL |
1784 | */ |
1785 | return; | |
f538b421 | 1786 | |
75b2920a HL |
1787 | if (ch->qrx_pkt->hdr->len <= QUIC_RETRY_INTEGRITY_TAG_LEN) |
1788 | /* Packets with zero-length Retry Tokens are invalid. */ | |
1789 | return; | |
f538b421 | 1790 | |
75b2920a HL |
1791 | /* |
1792 | * TODO(QUIC): Theoretically this should probably be in the QRX. | |
1793 | * However because validation is dependent on context (namely the | |
1794 | * client's initial DCID) we can't do this cleanly. In the future we | |
1795 | * should probably add a callback to the QRX to let it call us (via | |
1796 | * the DEMUX) and ask us about the correct original DCID, rather | |
1797 | * than allow the QRX to emit a potentially malformed packet to the | |
1798 | * upper layers. However, special casing this will do for now. | |
1799 | */ | |
1800 | if (!ossl_quic_validate_retry_integrity_tag(ch->libctx, | |
1801 | ch->propq, | |
1802 | ch->qrx_pkt->hdr, | |
1803 | &ch->init_dcid)) | |
1804 | /* Malformed retry packet, ignore. */ | |
1805 | return; | |
f538b421 | 1806 | |
75b2920a HL |
1807 | ch_retry(ch, ch->qrx_pkt->hdr->data, |
1808 | ch->qrx_pkt->hdr->len - QUIC_RETRY_INTEGRITY_TAG_LEN, | |
1809 | &ch->qrx_pkt->hdr->src_conn_id); | |
1810 | break; | |
f538b421 | 1811 | |
75b2920a | 1812 | case QUIC_PKT_TYPE_0RTT: |
b1b06da2 HL |
1813 | if (!ch->is_server) |
1814 | /* Clients should never receive 0-RTT packets. */ | |
1815 | return; | |
1816 | ||
1817 | /* | |
1818 | * TODO(QUIC): Implement 0-RTT on the server side. We currently do | |
1819 | * not need to implement this as a client can only do 0-RTT if we | |
1820 | * have given it permission to in a previous session. | |
1821 | */ | |
75b2920a HL |
1822 | break; |
1823 | ||
b1b06da2 HL |
1824 | case QUIC_PKT_TYPE_INITIAL: |
1825 | case QUIC_PKT_TYPE_HANDSHAKE: | |
1826 | case QUIC_PKT_TYPE_1RTT: | |
75b2920a HL |
1827 | if (ch->qrx_pkt->hdr->type == QUIC_PKT_TYPE_HANDSHAKE) |
1828 | /* | |
1829 | * We automatically drop INITIAL EL keys when first successfully | |
1830 | * decrypting a HANDSHAKE packet, as per the RFC. | |
1831 | */ | |
1832 | ch_discard_el(ch, QUIC_ENC_LEVEL_INITIAL); | |
1833 | ||
54fb0072 HL |
1834 | if (ch->rxku_in_progress |
1835 | && ch->qrx_pkt->hdr->type == QUIC_PKT_TYPE_1RTT | |
1836 | && ch->qrx_pkt->pn >= ch->rxku_trigger_pn | |
1837 | && ch->qrx_pkt->key_epoch < ossl_qrx_get_key_epoch(ch->qrx)) { | |
1838 | /* | |
1839 | * RFC 9001 s. 6.4: Packets with higher packet numbers MUST be | |
1840 | * protected with either the same or newer packet protection keys | |
1841 | * than packets with lower packet numbers. An endpoint that | |
1842 | * successfully removes protection with old keys when newer keys | |
1843 | * were used for packets with lower packet numbers MUST treat this | |
1844 | * as a connection error of type KEY_UPDATE_ERROR. | |
1845 | */ | |
1846 | ossl_quic_channel_raise_protocol_error(ch, QUIC_ERR_KEY_UPDATE_ERROR, | |
1847 | 0, "new packet with old keys"); | |
1848 | break; | |
1849 | } | |
1850 | ||
75b2920a HL |
1851 | /* This packet contains frames, pass to the RXDP. */ |
1852 | ossl_quic_handle_frames(ch, ch->qrx_pkt); /* best effort */ | |
1853 | break; | |
b1b06da2 HL |
1854 | |
1855 | default: | |
1856 | assert(0); | |
1857 | break; | |
1858 | } | |
1859 | } | |
1860 | ||
1861 | /* | |
1862 | * This is called by the demux when we get a packet not destined for any known | |
1863 | * DCID. | |
1864 | */ | |
1865 | static void ch_default_packet_handler(QUIC_URXE *e, void *arg) | |
1866 | { | |
1867 | QUIC_CHANNEL *ch = arg; | |
1868 | PACKET pkt; | |
1869 | QUIC_PKT_HDR hdr; | |
1870 | ||
1871 | if (!ossl_assert(ch->is_server)) | |
1872 | goto undesirable; | |
1873 | ||
1874 | /* | |
1875 | * We only support one connection to our server currently, so if we already | |
1876 | * started one, ignore any new connection attempts. | |
1877 | */ | |
1878 | if (ch->state != QUIC_CHANNEL_STATE_IDLE) | |
1879 | goto undesirable; | |
1880 | ||
1881 | /* | |
1882 | * We have got a packet for an unknown DCID. This might be an attempt to | |
1883 | * open a new connection. | |
1884 | */ | |
1885 | if (e->data_len < QUIC_MIN_INITIAL_DGRAM_LEN) | |
1886 | goto undesirable; | |
1887 | ||
1888 | if (!PACKET_buf_init(&pkt, ossl_quic_urxe_data(e), e->data_len)) | |
091f532e | 1889 | goto err; |
b1b06da2 HL |
1890 | |
1891 | /* | |
1892 | * We set short_conn_id_len to SIZE_MAX here which will cause the decode | |
1893 | * operation to fail if we get a 1-RTT packet. This is fine since we only | |
1894 | * care about Initial packets. | |
1895 | */ | |
e8528c95 | 1896 | if (!ossl_quic_wire_decode_pkt_hdr(&pkt, SIZE_MAX, 1, 0, &hdr, NULL)) |
b1b06da2 HL |
1897 | goto undesirable; |
1898 | ||
1899 | switch (hdr.version) { | |
1900 | case QUIC_VERSION_1: | |
1901 | break; | |
1902 | ||
1903 | case QUIC_VERSION_NONE: | |
1904 | default: | |
1905 | /* Unknown version or proactive version negotiation request, bail. */ | |
1906 | /* TODO(QUIC): Handle version negotiation on server side */ | |
1907 | goto undesirable; | |
f538b421 | 1908 | } |
b1b06da2 HL |
1909 | |
1910 | /* | |
1911 | * We only care about Initial packets which might be trying to establish a | |
1912 | * connection. | |
1913 | */ | |
1914 | if (hdr.type != QUIC_PKT_TYPE_INITIAL) | |
1915 | goto undesirable; | |
1916 | ||
1917 | /* | |
1918 | * Assume this is a valid attempt to initiate a connection. | |
1919 | * | |
1920 | * We do not register the DCID in the initial packet we received and that | |
1921 | * DCID is not actually used again, thus after provisioning the correct | |
1922 | * Initial keys derived from it (which is done in the call below) we pass | |
1923 | * the received packet directly to the QRX so that it can process it as a | |
1924 | * one-time thing, instead of going through the usual DEMUX DCID-based | |
1925 | * routing. | |
1926 | */ | |
1927 | if (!ch_server_on_new_conn(ch, &e->peer, | |
1928 | &hdr.src_conn_id, | |
1929 | &hdr.dst_conn_id)) | |
091f532e | 1930 | goto err; |
b1b06da2 HL |
1931 | |
1932 | ossl_qrx_inject_urxe(ch->qrx, e); | |
1933 | return; | |
1934 | ||
091f532e HL |
1935 | err: |
1936 | ossl_quic_channel_raise_protocol_error(ch, QUIC_ERR_INTERNAL_ERROR, 0, | |
1937 | "internal error"); | |
b1b06da2 HL |
1938 | undesirable: |
1939 | ossl_quic_demux_release_urxe(ch->demux, e); | |
f538b421 HL |
1940 | } |
1941 | ||
1942 | /* Try to generate packets and if possible, flush them to the network. */ | |
1943 | static int ch_tx(QUIC_CHANNEL *ch) | |
1944 | { | |
a3a51d6e | 1945 | QUIC_TXP_STATUS status; |
3b1ab5a3 | 1946 | |
f538b421 HL |
1947 | if (ch->state == QUIC_CHANNEL_STATE_TERMINATING_CLOSING) { |
1948 | /* | |
1949 | * While closing, only send CONN_CLOSE if we've received more traffic | |
1950 | * from the peer. Once we tell the TXP to generate CONN_CLOSE, all | |
1951 | * future calls to it generate CONN_CLOSE frames, so otherwise we would | |
1952 | * just constantly generate CONN_CLOSE frames. | |
1953 | */ | |
1954 | if (!ch->conn_close_queued) | |
1955 | return 0; | |
1956 | ||
1957 | ch->conn_close_queued = 0; | |
1958 | } | |
1959 | ||
8a65e7a5 HL |
1960 | /* Do TXKU if we need to. */ |
1961 | ch_maybe_trigger_spontaneous_txku(ch); | |
1962 | ||
1963 | ch->rxku_pending_confirm_done = 0; | |
1964 | ||
f538b421 HL |
1965 | /* |
1966 | * Send a packet, if we need to. Best effort. The TXP consults the CC and | |
1967 | * applies any limitations imposed by it, so we don't need to do it here. | |
1968 | * | |
1969 | * Best effort. In particular if TXP fails for some reason we should still | |
1970 | * flush any queued packets which we already generated. | |
1971 | */ | |
df15e990 | 1972 | switch (ossl_quic_tx_packetiser_generate(ch->txp, |
3b1ab5a3 | 1973 | TX_PACKETISER_ARCHETYPE_NORMAL, |
a3a51d6e | 1974 | &status)) { |
df15e990 HL |
1975 | case TX_PACKETISER_RES_SENT_PKT: |
1976 | ch->have_sent_any_pkt = 1; /* Packet was sent */ | |
3b1ab5a3 HL |
1977 | |
1978 | /* | |
1979 | * RFC 9000 s. 10.1. 'An endpoint also restarts its idle timer when | |
1980 | * sending an ack-eliciting packet if no other ack-eliciting packets | |
c4208a6a | 1981 | * have been sent since last receiving and processing a packet.' |
3b1ab5a3 | 1982 | */ |
a3a51d6e | 1983 | if (status.sent_ack_eliciting && !ch->have_sent_ack_eliciting_since_rx) { |
3b1ab5a3 HL |
1984 | ch_update_idle(ch); |
1985 | ch->have_sent_ack_eliciting_since_rx = 1; | |
1986 | } | |
1987 | ||
8a65e7a5 HL |
1988 | if (ch->rxku_pending_confirm_done) |
1989 | ch->rxku_pending_confirm = 0; | |
1990 | ||
3b1ab5a3 | 1991 | ch_update_ping_deadline(ch); |
df15e990 | 1992 | break; |
3b1ab5a3 | 1993 | |
df15e990 HL |
1994 | case TX_PACKETISER_RES_NO_PKT: |
1995 | break; /* No packet was sent */ | |
1996 | default: | |
1997 | ossl_quic_channel_raise_protocol_error(ch, QUIC_ERR_INTERNAL_ERROR, 0, | |
1998 | "internal error"); | |
1999 | break; /* Internal failure (e.g. allocation, assertion) */ | |
2000 | } | |
2001 | ||
2002 | /* Flush packets to network. */ | |
2003 | switch (ossl_qtx_flush_net(ch->qtx)) { | |
2004 | case QTX_FLUSH_NET_RES_OK: | |
2005 | case QTX_FLUSH_NET_RES_TRANSIENT_FAIL: | |
2006 | /* Best effort, done for now. */ | |
2007 | break; | |
2008 | ||
2009 | case QTX_FLUSH_NET_RES_PERMANENT_FAIL: | |
2010 | default: | |
2011 | /* Permanent underlying network BIO, start terminating. */ | |
2012 | ch_raise_net_error(ch); | |
2013 | break; | |
2014 | } | |
f538b421 | 2015 | |
f538b421 HL |
2016 | return 1; |
2017 | } | |
2018 | ||
2019 | /* Determine next tick deadline. */ | |
2020 | static OSSL_TIME ch_determine_next_tick_deadline(QUIC_CHANNEL *ch) | |
2021 | { | |
2022 | OSSL_TIME deadline; | |
ca711651 | 2023 | int i; |
f538b421 | 2024 | |
c12e1113 | 2025 | if (ossl_quic_channel_is_terminated(ch)) |
df15e990 HL |
2026 | return ossl_time_infinite(); |
2027 | ||
f538b421 HL |
2028 | deadline = ossl_ackm_get_loss_detection_deadline(ch->ackm); |
2029 | if (ossl_time_is_zero(deadline)) | |
2030 | deadline = ossl_time_infinite(); | |
2031 | ||
ca711651 MC |
2032 | /* |
2033 | * If the CC will let us send acks, check the ack deadline for all | |
2034 | * enc_levels that are actually provisioned | |
2035 | */ | |
2036 | if (ch->cc_method->get_tx_allowance(ch->cc_data) > 0) { | |
2037 | for (i = 0; i < QUIC_ENC_LEVEL_NUM; i++) { | |
2038 | if (ossl_qtx_is_enc_level_provisioned(ch->qtx, i)) { | |
2039 | deadline = ossl_time_min(deadline, | |
2040 | ossl_ackm_get_ack_deadline(ch->ackm, | |
2041 | ossl_quic_enc_level_to_pn_space(i))); | |
2042 | } | |
2043 | } | |
2044 | } | |
f538b421 HL |
2045 | |
2046 | /* When will CC let us send more? */ | |
2047 | if (ossl_quic_tx_packetiser_has_pending(ch->txp, TX_PACKETISER_ARCHETYPE_NORMAL, | |
2048 | TX_PACKETISER_BYPASS_CC)) | |
2049 | deadline = ossl_time_min(deadline, | |
90699176 | 2050 | ch->cc_method->get_wakeup_deadline(ch->cc_data)); |
f538b421 HL |
2051 | |
2052 | /* Is the terminating timer armed? */ | |
c12e1113 | 2053 | if (ossl_quic_channel_is_terminating(ch)) |
f538b421 HL |
2054 | deadline = ossl_time_min(deadline, |
2055 | ch->terminate_deadline); | |
2056 | else if (!ossl_time_is_infinite(ch->idle_deadline)) | |
2057 | deadline = ossl_time_min(deadline, | |
2058 | ch->idle_deadline); | |
2059 | ||
3b1ab5a3 HL |
2060 | /* |
2061 | * When do we need to send an ACK-eliciting packet to reset the idle | |
2062 | * deadline timer for the peer? | |
2063 | */ | |
2064 | if (!ossl_time_is_infinite(ch->ping_deadline)) | |
2065 | deadline = ossl_time_min(deadline, | |
2066 | ch->ping_deadline); | |
2067 | ||
8a65e7a5 HL |
2068 | /* When does the RXKU process complete? */ |
2069 | if (ch->rxku_in_progress) | |
2070 | deadline = ossl_time_min(deadline, ch->rxku_update_end_deadline); | |
2071 | ||
f538b421 HL |
2072 | return deadline; |
2073 | } | |
2074 | ||
2075 | /* | |
2076 | * QUIC Channel: Network BIO Configuration | |
2077 | * ======================================= | |
2078 | */ | |
2079 | ||
2080 | /* Determines whether we can support a given poll descriptor. */ | |
2081 | static int validate_poll_descriptor(const BIO_POLL_DESCRIPTOR *d) | |
2082 | { | |
2083 | if (d->type == BIO_POLL_DESCRIPTOR_TYPE_SOCK_FD && d->value.fd < 0) | |
2084 | return 0; | |
2085 | ||
2086 | return 1; | |
2087 | } | |
2088 | ||
2089 | BIO *ossl_quic_channel_get_net_rbio(QUIC_CHANNEL *ch) | |
2090 | { | |
2091 | return ch->net_rbio; | |
2092 | } | |
2093 | ||
2094 | BIO *ossl_quic_channel_get_net_wbio(QUIC_CHANNEL *ch) | |
2095 | { | |
2096 | return ch->net_wbio; | |
2097 | } | |
2098 | ||
d1ac77b1 HL |
2099 | /* |
2100 | * QUIC_CHANNEL does not ref any BIO it is provided with, nor is any ref | |
2101 | * transferred to it. The caller (i.e., QUIC_CONNECTION) is responsible for | |
2102 | * ensuring the BIO lasts until the channel is freed or the BIO is switched out | |
2103 | * for another BIO by a subsequent successful call to this function. | |
2104 | */ | |
2105 | int ossl_quic_channel_set_net_rbio(QUIC_CHANNEL *ch, BIO *net_rbio) | |
f538b421 HL |
2106 | { |
2107 | BIO_POLL_DESCRIPTOR d = {0}; | |
2108 | ||
2109 | if (ch->net_rbio == net_rbio) | |
2110 | return 1; | |
2111 | ||
2112 | if (net_rbio != NULL) { | |
2113 | if (!BIO_get_rpoll_descriptor(net_rbio, &d)) | |
2114 | /* Non-pollable BIO */ | |
2115 | d.type = BIO_POLL_DESCRIPTOR_TYPE_NONE; | |
2116 | ||
2117 | if (!validate_poll_descriptor(&d)) | |
2118 | return 0; | |
2119 | } | |
2120 | ||
2121 | ossl_quic_reactor_set_poll_r(&ch->rtor, &d); | |
f538b421 HL |
2122 | ossl_quic_demux_set_bio(ch->demux, net_rbio); |
2123 | ch->net_rbio = net_rbio; | |
2124 | return 1; | |
2125 | } | |
2126 | ||
d1ac77b1 | 2127 | int ossl_quic_channel_set_net_wbio(QUIC_CHANNEL *ch, BIO *net_wbio) |
f538b421 HL |
2128 | { |
2129 | BIO_POLL_DESCRIPTOR d = {0}; | |
2130 | ||
2131 | if (ch->net_wbio == net_wbio) | |
2132 | return 1; | |
2133 | ||
2134 | if (net_wbio != NULL) { | |
2135 | if (!BIO_get_wpoll_descriptor(net_wbio, &d)) | |
2136 | /* Non-pollable BIO */ | |
2137 | d.type = BIO_POLL_DESCRIPTOR_TYPE_NONE; | |
2138 | ||
2139 | if (!validate_poll_descriptor(&d)) | |
2140 | return 0; | |
2141 | } | |
2142 | ||
2143 | ossl_quic_reactor_set_poll_w(&ch->rtor, &d); | |
f538b421 HL |
2144 | ossl_qtx_set_bio(ch->qtx, net_wbio); |
2145 | ch->net_wbio = net_wbio; | |
2146 | return 1; | |
2147 | } | |
2148 | ||
2149 | /* | |
2150 | * QUIC Channel: Lifecycle Events | |
2151 | * ============================== | |
2152 | */ | |
f538b421 HL |
2153 | int ossl_quic_channel_start(QUIC_CHANNEL *ch) |
2154 | { | |
b1b06da2 HL |
2155 | if (ch->is_server) |
2156 | /* | |
2157 | * This is not used by the server. The server moves to active | |
2158 | * automatically on receiving an incoming connection. | |
2159 | */ | |
2160 | return 0; | |
2161 | ||
f538b421 HL |
2162 | if (ch->state != QUIC_CHANNEL_STATE_IDLE) |
2163 | /* Calls to connect are idempotent */ | |
2164 | return 1; | |
2165 | ||
2166 | /* Inform QTX of peer address. */ | |
2167 | if (!ossl_quic_tx_packetiser_set_peer(ch->txp, &ch->cur_peer_addr)) | |
2168 | return 0; | |
2169 | ||
2170 | /* Plug in secrets for the Initial EL. */ | |
2171 | if (!ossl_quic_provide_initial_secret(ch->libctx, | |
2172 | ch->propq, | |
2173 | &ch->init_dcid, | |
091f532e | 2174 | ch->is_server, |
f538b421 HL |
2175 | ch->qrx, ch->qtx)) |
2176 | return 0; | |
2177 | ||
2178 | /* Change state. */ | |
2179 | ch->state = QUIC_CHANNEL_STATE_ACTIVE; | |
2180 | ch->doing_proactive_ver_neg = 0; /* not currently supported */ | |
2181 | ||
2182 | /* Handshake layer: start (e.g. send CH). */ | |
2723d705 | 2183 | if (!ossl_quic_tls_tick(ch->qtls)) |
f538b421 HL |
2184 | return 0; |
2185 | ||
ccd31037 | 2186 | ossl_quic_reactor_tick(&ch->rtor, 0); /* best effort */ |
f538b421 HL |
2187 | return 1; |
2188 | } | |
2189 | ||
2190 | /* Start a locally initiated connection shutdown. */ | |
e8043229 | 2191 | void ossl_quic_channel_local_close(QUIC_CHANNEL *ch, uint64_t app_error_code) |
f538b421 HL |
2192 | { |
2193 | QUIC_TERMINATE_CAUSE tcause = {0}; | |
2194 | ||
c12e1113 | 2195 | if (ossl_quic_channel_is_term_any(ch)) |
f538b421 HL |
2196 | return; |
2197 | ||
e8043229 HL |
2198 | tcause.app = 1; |
2199 | tcause.error_code = app_error_code; | |
df15e990 | 2200 | ch_start_terminating(ch, &tcause, 0); |
f538b421 HL |
2201 | } |
2202 | ||
2203 | static void free_token(const unsigned char *buf, size_t buf_len, void *arg) | |
2204 | { | |
2205 | OPENSSL_free((unsigned char *)buf); | |
2206 | } | |
2207 | ||
2208 | /* Called when a server asks us to do a retry. */ | |
2209 | static int ch_retry(QUIC_CHANNEL *ch, | |
2210 | const unsigned char *retry_token, | |
2211 | size_t retry_token_len, | |
2212 | const QUIC_CONN_ID *retry_scid) | |
2213 | { | |
2214 | void *buf; | |
2215 | ||
2216 | /* We change to using the SCID in the Retry packet as the DCID. */ | |
2217 | if (!ossl_quic_tx_packetiser_set_cur_dcid(ch->txp, retry_scid)) | |
2218 | return 0; | |
2219 | ||
2220 | /* | |
2221 | * Now we retry. We will release the Retry packet immediately, so copy | |
2222 | * the token. | |
2223 | */ | |
e28f512f | 2224 | if ((buf = OPENSSL_memdup(retry_token, retry_token_len)) == NULL) |
f538b421 HL |
2225 | return 0; |
2226 | ||
f538b421 HL |
2227 | ossl_quic_tx_packetiser_set_initial_token(ch->txp, buf, retry_token_len, |
2228 | free_token, NULL); | |
2229 | ||
2230 | ch->retry_scid = *retry_scid; | |
2231 | ch->doing_retry = 1; | |
2232 | ||
2233 | /* | |
2234 | * We need to stimulate the Initial EL to generate the first CRYPTO frame | |
2235 | * again. We can do this most cleanly by simply forcing the ACKM to consider | |
2236 | * the first Initial packet as lost, which it effectively was as the server | |
2237 | * hasn't processed it. This also maintains the desired behaviour with e.g. | |
2238 | * PNs not resetting and so on. | |
2239 | * | |
2240 | * The PN we used initially is always zero, because QUIC does not allow | |
2241 | * repeated retries. | |
2242 | */ | |
2243 | if (!ossl_ackm_mark_packet_pseudo_lost(ch->ackm, QUIC_PN_SPACE_INITIAL, | |
2244 | /*PN=*/0)) | |
2245 | return 0; | |
2246 | ||
2247 | /* | |
2248 | * Plug in new secrets for the Initial EL. This is the only time we change | |
2249 | * the secrets for an EL after we already provisioned it. | |
2250 | */ | |
2251 | if (!ossl_quic_provide_initial_secret(ch->libctx, | |
2252 | ch->propq, | |
2253 | &ch->retry_scid, | |
2254 | /*is_server=*/0, | |
2255 | ch->qrx, ch->qtx)) | |
2256 | return 0; | |
2257 | ||
2258 | return 1; | |
2259 | } | |
2260 | ||
2261 | /* Called when an EL is to be discarded. */ | |
2262 | static int ch_discard_el(QUIC_CHANNEL *ch, | |
2263 | uint32_t enc_level) | |
2264 | { | |
2265 | if (!ossl_assert(enc_level < QUIC_ENC_LEVEL_1RTT)) | |
2266 | return 0; | |
2267 | ||
2268 | if ((ch->el_discarded & (1U << enc_level)) != 0) | |
2269 | /* Already done. */ | |
2270 | return 1; | |
2271 | ||
2272 | /* Best effort for all of these. */ | |
2273 | ossl_quic_tx_packetiser_discard_enc_level(ch->txp, enc_level); | |
2274 | ossl_qrx_discard_enc_level(ch->qrx, enc_level); | |
2275 | ossl_qtx_discard_enc_level(ch->qtx, enc_level); | |
2276 | ||
2277 | if (enc_level != QUIC_ENC_LEVEL_0RTT) { | |
2278 | uint32_t pn_space = ossl_quic_enc_level_to_pn_space(enc_level); | |
2279 | ||
2280 | ossl_ackm_on_pkt_space_discarded(ch->ackm, pn_space); | |
2281 | ||
2282 | /* We should still have crypto streams at this point. */ | |
79534440 HL |
2283 | if (!ossl_assert(ch->crypto_send[pn_space] != NULL) |
2284 | || !ossl_assert(ch->crypto_recv[pn_space] != NULL)) | |
2285 | return 0; | |
f538b421 HL |
2286 | |
2287 | /* Get rid of the crypto stream state for the EL. */ | |
2288 | ossl_quic_sstream_free(ch->crypto_send[pn_space]); | |
2289 | ch->crypto_send[pn_space] = NULL; | |
2290 | ||
2291 | ossl_quic_rstream_free(ch->crypto_recv[pn_space]); | |
2292 | ch->crypto_recv[pn_space] = NULL; | |
2293 | } | |
2294 | ||
2295 | ch->el_discarded |= (1U << enc_level); | |
2296 | return 1; | |
2297 | } | |
2298 | ||
2299 | /* Intended to be called by the RXDP. */ | |
2300 | int ossl_quic_channel_on_handshake_confirmed(QUIC_CHANNEL *ch) | |
2301 | { | |
2302 | if (ch->handshake_confirmed) | |
2303 | return 1; | |
2304 | ||
2305 | if (!ch->handshake_complete) { | |
2306 | /* | |
2307 | * Does not make sense for handshake to be confirmed before it is | |
2308 | * completed. | |
2309 | */ | |
2310 | ossl_quic_channel_raise_protocol_error(ch, QUIC_ERR_PROTOCOL_VIOLATION, | |
2311 | OSSL_QUIC_FRAME_TYPE_HANDSHAKE_DONE, | |
2312 | "handshake cannot be confirmed " | |
2313 | "before it is completed"); | |
2314 | return 0; | |
2315 | } | |
2316 | ||
2317 | ch_discard_el(ch, QUIC_ENC_LEVEL_HANDSHAKE); | |
2318 | ch->handshake_confirmed = 1; | |
29a541fe | 2319 | ossl_ackm_on_handshake_confirmed(ch->ackm); |
f538b421 HL |
2320 | return 1; |
2321 | } | |
2322 | ||
2323 | /* | |
2324 | * Master function used when we want to start tearing down a connection: | |
2325 | * | |
2326 | * - If the connection is still IDLE we can go straight to TERMINATED; | |
2327 | * | |
2328 | * - If we are already TERMINATED this is a no-op. | |
2329 | * | |
2330 | * - If we are TERMINATING - CLOSING and we have now got a CONNECTION_CLOSE | |
9bbc5b54 | 2331 | * from the peer (tcause->remote == 1), we move to TERMINATING - DRAINING. |
f538b421 HL |
2332 | * |
2333 | * - If we are TERMINATING - DRAINING, we remain here until the terminating | |
2334 | * timer expires. | |
2335 | * | |
2336 | * - Otherwise, we are in ACTIVE and move to TERMINATING - CLOSING. | |
2337 | * if we caused the termination (e.g. we have sent a CONNECTION_CLOSE). Note | |
2338 | * that we are considered to have caused a termination if we sent the first | |
2339 | * CONNECTION_CLOSE frame, even if it is caused by a peer protocol | |
2340 | * violation. If the peer sent the first CONNECTION_CLOSE frame, we move to | |
2341 | * TERMINATING - DRAINING. | |
2342 | * | |
2343 | * We record the termination cause structure passed on the first call only. | |
2344 | * Any successive calls have their termination cause data discarded; | |
2345 | * once we start sending a CONNECTION_CLOSE frame, we don't change the details | |
2346 | * in it. | |
2347 | */ | |
2348 | static void ch_start_terminating(QUIC_CHANNEL *ch, | |
df15e990 HL |
2349 | const QUIC_TERMINATE_CAUSE *tcause, |
2350 | int force_immediate) | |
f538b421 HL |
2351 | { |
2352 | switch (ch->state) { | |
75b2920a HL |
2353 | default: |
2354 | case QUIC_CHANNEL_STATE_IDLE: | |
2355 | ch->terminate_cause = *tcause; | |
2356 | ch_on_terminating_timeout(ch); | |
2357 | break; | |
2358 | ||
2359 | case QUIC_CHANNEL_STATE_ACTIVE: | |
75b2920a | 2360 | ch->terminate_cause = *tcause; |
df15e990 HL |
2361 | |
2362 | if (!force_immediate) { | |
2363 | ch->state = tcause->remote ? QUIC_CHANNEL_STATE_TERMINATING_DRAINING | |
2364 | : QUIC_CHANNEL_STATE_TERMINATING_CLOSING; | |
2365 | ch->terminate_deadline | |
b212d554 | 2366 | = ossl_time_add(get_time(ch), |
df15e990 HL |
2367 | ossl_time_multiply(ossl_ackm_get_pto_duration(ch->ackm), |
2368 | 3)); | |
2369 | ||
2370 | if (!tcause->remote) { | |
2371 | OSSL_QUIC_FRAME_CONN_CLOSE f = {0}; | |
2372 | ||
2373 | /* best effort */ | |
2374 | f.error_code = ch->terminate_cause.error_code; | |
2375 | f.frame_type = ch->terminate_cause.frame_type; | |
2376 | f.is_app = ch->terminate_cause.app; | |
2377 | ossl_quic_tx_packetiser_schedule_conn_close(ch->txp, &f); | |
2378 | ch->conn_close_queued = 1; | |
2379 | } | |
2380 | } else { | |
2381 | ch_on_terminating_timeout(ch); | |
75b2920a HL |
2382 | } |
2383 | break; | |
f538b421 | 2384 | |
75b2920a | 2385 | case QUIC_CHANNEL_STATE_TERMINATING_CLOSING: |
df15e990 HL |
2386 | if (force_immediate) |
2387 | ch_on_terminating_timeout(ch); | |
2388 | else if (tcause->remote) | |
75b2920a | 2389 | ch->state = QUIC_CHANNEL_STATE_TERMINATING_DRAINING; |
f538b421 | 2390 | |
75b2920a | 2391 | break; |
f538b421 | 2392 | |
75b2920a | 2393 | case QUIC_CHANNEL_STATE_TERMINATING_DRAINING: |
df15e990 HL |
2394 | /* |
2395 | * Other than in the force-immediate case, we remain here until the | |
eb4129e1 | 2396 | * timeout expires. |
df15e990 HL |
2397 | */ |
2398 | if (force_immediate) | |
2399 | ch_on_terminating_timeout(ch); | |
2400 | ||
75b2920a | 2401 | break; |
f538b421 | 2402 | |
75b2920a HL |
2403 | case QUIC_CHANNEL_STATE_TERMINATED: |
2404 | /* No-op. */ | |
2405 | break; | |
f538b421 HL |
2406 | } |
2407 | } | |
2408 | ||
2409 | /* For RXDP use. */ | |
2410 | void ossl_quic_channel_on_remote_conn_close(QUIC_CHANNEL *ch, | |
2411 | OSSL_QUIC_FRAME_CONN_CLOSE *f) | |
2412 | { | |
2413 | QUIC_TERMINATE_CAUSE tcause = {0}; | |
2414 | ||
2415 | if (!ossl_quic_channel_is_active(ch)) | |
2416 | return; | |
2417 | ||
2418 | tcause.remote = 1; | |
2419 | tcause.app = f->is_app; | |
2420 | tcause.error_code = f->error_code; | |
2421 | tcause.frame_type = f->frame_type; | |
2422 | ||
df15e990 HL |
2423 | ch_start_terminating(ch, &tcause, 0); |
2424 | } | |
2425 | ||
eff04652 TM |
2426 | static void free_frame_data(unsigned char *buf, size_t buf_len, void *arg) |
2427 | { | |
2428 | OPENSSL_free(buf); | |
2429 | } | |
2430 | ||
2431 | static int ch_enqueue_retire_conn_id(QUIC_CHANNEL *ch, uint64_t seq_num) | |
2432 | { | |
2433 | BUF_MEM *buf_mem; | |
2434 | WPACKET wpkt; | |
2435 | size_t l; | |
2436 | ||
2437 | if ((buf_mem = BUF_MEM_new()) == NULL) | |
2438 | return 0; | |
2439 | ||
2440 | if (!WPACKET_init(&wpkt, buf_mem)) | |
2441 | goto err; | |
2442 | ||
2443 | if (!ossl_quic_wire_encode_frame_retire_conn_id(&wpkt, seq_num)) { | |
2444 | WPACKET_cleanup(&wpkt); | |
2445 | goto err; | |
2446 | } | |
2447 | ||
2448 | WPACKET_finish(&wpkt); | |
2449 | if (!WPACKET_get_total_written(&wpkt, &l)) | |
2450 | goto err; | |
2451 | ||
2452 | if (ossl_quic_cfq_add_frame(ch->cfq, 1, QUIC_PN_SPACE_APP, | |
2453 | OSSL_QUIC_FRAME_TYPE_RETIRE_CONN_ID, | |
2454 | (unsigned char *)buf_mem->data, l, | |
2455 | free_frame_data, NULL) == NULL) | |
2456 | goto err; | |
2457 | ||
2458 | buf_mem->data = NULL; | |
2459 | BUF_MEM_free(buf_mem); | |
2460 | return 1; | |
2461 | ||
2462 | err: | |
2463 | ossl_quic_channel_raise_protocol_error(ch, | |
2464 | QUIC_ERR_INTERNAL_ERROR, | |
2465 | OSSL_QUIC_FRAME_TYPE_NEW_CONN_ID, | |
2466 | "internal error enqueueing retire conn id"); | |
2467 | BUF_MEM_free(buf_mem); | |
2468 | return 0; | |
2469 | } | |
2470 | ||
2471 | void ossl_quic_channel_on_new_conn_id(QUIC_CHANNEL *ch, | |
2472 | OSSL_QUIC_FRAME_NEW_CONN_ID *f) | |
2473 | { | |
2474 | uint64_t new_remote_seq_num = ch->cur_remote_seq_num; | |
2475 | uint64_t new_retire_prior_to = ch->cur_retire_prior_to; | |
2476 | ||
2477 | if (!ossl_quic_channel_is_active(ch)) | |
2478 | return; | |
2479 | ||
2480 | /* We allow only two active connection ids; first check some constraints */ | |
2481 | ||
2482 | if (ch->cur_remote_dcid.id_len == 0) { | |
2483 | /* Changing from 0 length connection id is disallowed */ | |
2484 | ossl_quic_channel_raise_protocol_error(ch, | |
2485 | QUIC_ERR_PROTOCOL_VIOLATION, | |
2486 | OSSL_QUIC_FRAME_TYPE_NEW_CONN_ID, | |
2487 | "zero length connection id in use"); | |
2488 | ||
2489 | return; | |
2490 | } | |
2491 | ||
2492 | if (f->seq_num > new_remote_seq_num) | |
2493 | new_remote_seq_num = f->seq_num; | |
2494 | if (f->retire_prior_to > new_retire_prior_to) | |
2495 | new_retire_prior_to = f->retire_prior_to; | |
2496 | ||
985429f4 P |
2497 | /* |
2498 | * RFC 9000-5.1.1: An endpoint MUST NOT provide more connection IDs | |
2499 | * than the peer's limit. | |
2500 | * | |
2501 | * After processing a NEW_CONNECTION_ID frame and adding and retiring | |
2502 | * active connection IDs, if the number of active connection IDs exceeds | |
2503 | * the value advertised in its active_connection_id_limit transport | |
2504 | * parameter, an endpoint MUST close the connection with an error of | |
2505 | * type CONNECTION_ID_LIMIT_ERROR. | |
2506 | */ | |
2507 | if (new_remote_seq_num - new_retire_prior_to > 1) { | |
eff04652 TM |
2508 | ossl_quic_channel_raise_protocol_error(ch, |
2509 | QUIC_ERR_CONNECTION_ID_LIMIT_ERROR, | |
2510 | OSSL_QUIC_FRAME_TYPE_NEW_CONN_ID, | |
2511 | "active_connection_id limit violated"); | |
985429f4 P |
2512 | return; |
2513 | } | |
2514 | ||
2515 | /* | |
2516 | * RFC 9000-5.1.1: An endpoint MAY send connection IDs that temporarily | |
2517 | * exceed a peer's limit if the NEW_CONNECTION_ID frame also requires | |
2518 | * the retirement of any excess, by including a sufficiently large | |
2519 | * value in the Retire Prior To field. | |
2520 | * | |
2521 | * RFC 9000-5.1.2: An endpoint SHOULD allow for sending and tracking | |
2522 | * a number of RETIRE_CONNECTION_ID frames of at least twice the value | |
2523 | * of the active_connection_id_limit transport parameter. An endpoint | |
2524 | * MUST NOT forget a connection ID without retiring it, though it MAY | |
2525 | * choose to treat having connection IDs in need of retirement that | |
2526 | * exceed this limit as a connection error of type CONNECTION_ID_LIMIT_ERROR. | |
2527 | * | |
2528 | * We are a little bit more liberal than the minimum mandated. | |
2529 | */ | |
2530 | if (new_retire_prior_to - ch->cur_retire_prior_to > 10) { | |
2531 | ossl_quic_channel_raise_protocol_error(ch, | |
2532 | QUIC_ERR_CONNECTION_ID_LIMIT_ERROR, | |
2533 | OSSL_QUIC_FRAME_TYPE_NEW_CONN_ID, | |
2534 | "retiring connection id limit violated"); | |
eff04652 TM |
2535 | |
2536 | return; | |
2537 | } | |
2538 | ||
2539 | if (new_remote_seq_num > ch->cur_remote_seq_num) { | |
2540 | ch->cur_remote_seq_num = new_remote_seq_num; | |
2541 | ch->cur_remote_dcid = f->conn_id; | |
2542 | ossl_quic_tx_packetiser_set_cur_dcid(ch->txp, &ch->cur_remote_dcid); | |
2543 | } | |
985429f4 P |
2544 | /* |
2545 | * RFC 9000-5.1.2: Upon receipt of an increased Retire Prior To | |
2546 | * field, the peer MUST stop using the corresponding connection IDs | |
2547 | * and retire them with RETIRE_CONNECTION_ID frames before adding the | |
2548 | * newly provided connection ID to the set of active connection IDs. | |
2549 | */ | |
eff04652 TM |
2550 | while (new_retire_prior_to > ch->cur_retire_prior_to) { |
2551 | if (!ch_enqueue_retire_conn_id(ch, ch->cur_retire_prior_to)) | |
2552 | break; | |
2553 | ++ch->cur_retire_prior_to; | |
2554 | } | |
2555 | } | |
2556 | ||
df15e990 HL |
2557 | static void ch_raise_net_error(QUIC_CHANNEL *ch) |
2558 | { | |
2559 | QUIC_TERMINATE_CAUSE tcause = {0}; | |
2560 | ||
2561 | tcause.error_code = QUIC_ERR_INTERNAL_ERROR; | |
2562 | ||
2563 | /* | |
2564 | * Skip Terminating state and go directly to Terminated, no point trying to | |
2565 | * send CONNECTION_CLOSE if we cannot communicate. | |
2566 | */ | |
2567 | ch_start_terminating(ch, &tcause, 1); | |
f538b421 HL |
2568 | } |
2569 | ||
2570 | void ossl_quic_channel_raise_protocol_error(QUIC_CHANNEL *ch, | |
2571 | uint64_t error_code, | |
2572 | uint64_t frame_type, | |
2573 | const char *reason) | |
2574 | { | |
2575 | QUIC_TERMINATE_CAUSE tcause = {0}; | |
2576 | ||
2577 | tcause.error_code = error_code; | |
2578 | tcause.frame_type = frame_type; | |
2579 | ||
df15e990 | 2580 | ch_start_terminating(ch, &tcause, 0); |
f538b421 HL |
2581 | } |
2582 | ||
2583 | /* | |
2584 | * Called once the terminating timer expires, meaning we move from TERMINATING | |
2585 | * to TERMINATED. | |
2586 | */ | |
2587 | static void ch_on_terminating_timeout(QUIC_CHANNEL *ch) | |
2588 | { | |
2589 | ch->state = QUIC_CHANNEL_STATE_TERMINATED; | |
2590 | } | |
2591 | ||
2592 | /* | |
2593 | * Updates our idle deadline. Called when an event happens which should bump the | |
2594 | * idle timeout. | |
2595 | */ | |
2596 | static void ch_update_idle(QUIC_CHANNEL *ch) | |
2597 | { | |
2598 | if (ch->max_idle_timeout == 0) | |
2599 | ch->idle_deadline = ossl_time_infinite(); | |
2600 | else | |
b212d554 | 2601 | ch->idle_deadline = ossl_time_add(get_time(ch), |
f538b421 HL |
2602 | ossl_ms2time(ch->max_idle_timeout)); |
2603 | } | |
2604 | ||
3b1ab5a3 HL |
2605 | /* |
2606 | * Updates our ping deadline, which determines when we next generate a ping if | |
2607 | * we don't have any other ACK-eliciting frames to send. | |
2608 | */ | |
2609 | static void ch_update_ping_deadline(QUIC_CHANNEL *ch) | |
2610 | { | |
2611 | if (ch->max_idle_timeout > 0) { | |
2612 | /* | |
9cf091a3 HL |
2613 | * Maximum amount of time without traffic before we send a PING to keep |
2614 | * the connection open. Usually we use max_idle_timeout/2, but ensure | |
2615 | * the period never exceeds the assumed NAT interval to ensure NAT | |
2616 | * devices don't have their state time out (RFC 9000 s. 10.1.2). | |
3b1ab5a3 HL |
2617 | */ |
2618 | OSSL_TIME max_span | |
2619 | = ossl_time_divide(ossl_ms2time(ch->max_idle_timeout), 2); | |
2620 | ||
9cf091a3 | 2621 | max_span = ossl_time_min(max_span, MAX_NAT_INTERVAL); |
3b1ab5a3 HL |
2622 | |
2623 | ch->ping_deadline = ossl_time_add(get_time(ch), max_span); | |
2624 | } else { | |
2625 | ch->ping_deadline = ossl_time_infinite(); | |
2626 | } | |
2627 | } | |
2628 | ||
f538b421 HL |
2629 | /* Called when the idle timeout expires. */ |
2630 | static void ch_on_idle_timeout(QUIC_CHANNEL *ch) | |
2631 | { | |
2632 | /* | |
2633 | * Idle timeout does not have an error code associated with it because a | |
2634 | * CONN_CLOSE is never sent for it. We shouldn't use this data once we reach | |
2635 | * TERMINATED anyway. | |
2636 | */ | |
2637 | ch->terminate_cause.app = 0; | |
2638 | ch->terminate_cause.error_code = UINT64_MAX; | |
2639 | ch->terminate_cause.frame_type = 0; | |
2640 | ||
2641 | ch->state = QUIC_CHANNEL_STATE_TERMINATED; | |
2642 | } | |
b1b06da2 HL |
2643 | |
2644 | /* Called when we, as a server, get a new incoming connection. */ | |
2645 | static int ch_server_on_new_conn(QUIC_CHANNEL *ch, const BIO_ADDR *peer, | |
2646 | const QUIC_CONN_ID *peer_scid, | |
2647 | const QUIC_CONN_ID *peer_dcid) | |
2648 | { | |
2649 | if (!ossl_assert(ch->state == QUIC_CHANNEL_STATE_IDLE && ch->is_server)) | |
2650 | return 0; | |
2651 | ||
2652 | /* Generate a SCID we will use for the connection. */ | |
2653 | if (!gen_rand_conn_id(ch->libctx, INIT_DCID_LEN, | |
bbc97540 | 2654 | &ch->cur_local_cid)) |
b1b06da2 HL |
2655 | return 0; |
2656 | ||
2657 | /* Note our newly learnt peer address and CIDs. */ | |
2658 | ch->cur_peer_addr = *peer; | |
2659 | ch->init_dcid = *peer_dcid; | |
2660 | ch->cur_remote_dcid = *peer_scid; | |
2661 | ||
2662 | /* Inform QTX of peer address. */ | |
2663 | if (!ossl_quic_tx_packetiser_set_peer(ch->txp, &ch->cur_peer_addr)) | |
2664 | return 0; | |
2665 | ||
2666 | /* Inform TXP of desired CIDs. */ | |
2667 | if (!ossl_quic_tx_packetiser_set_cur_dcid(ch->txp, &ch->cur_remote_dcid)) | |
2668 | return 0; | |
2669 | ||
bbc97540 | 2670 | if (!ossl_quic_tx_packetiser_set_cur_scid(ch->txp, &ch->cur_local_cid)) |
b1b06da2 HL |
2671 | return 0; |
2672 | ||
2673 | /* Plug in secrets for the Initial EL. */ | |
2674 | if (!ossl_quic_provide_initial_secret(ch->libctx, | |
2675 | ch->propq, | |
2676 | &ch->init_dcid, | |
2677 | /*is_server=*/1, | |
2678 | ch->qrx, ch->qtx)) | |
2679 | return 0; | |
2680 | ||
bbc97540 TM |
2681 | /* Register our local CID in the DEMUX. */ |
2682 | if (!ossl_qrx_add_dst_conn_id(ch->qrx, &ch->cur_local_cid)) | |
b1b06da2 HL |
2683 | return 0; |
2684 | ||
2685 | /* Change state. */ | |
2686 | ch->state = QUIC_CHANNEL_STATE_ACTIVE; | |
2687 | ch->doing_proactive_ver_neg = 0; /* not currently supported */ | |
2688 | return 1; | |
2689 | } | |
d03fe5de MC |
2690 | |
2691 | SSL *ossl_quic_channel_get0_ssl(QUIC_CHANNEL *ch) | |
2692 | { | |
2693 | return ch->tls; | |
2694 | } | |
2dbc39de | 2695 | |
e8fe7a21 HL |
2696 | static int ch_init_new_stream(QUIC_CHANNEL *ch, QUIC_STREAM *qs, |
2697 | int can_send, int can_recv) | |
2698 | { | |
2699 | uint64_t rxfc_wnd; | |
2700 | int server_init = ossl_quic_stream_is_server_init(qs); | |
2701 | int local_init = (ch->is_server == server_init); | |
2702 | int is_uni = !ossl_quic_stream_is_bidi(qs); | |
6ba2edb7 | 2703 | int cleanse = (ch->tls->ctx->options & SSL_OP_CLEANSE_PLAINTEXT) != 0; |
e8fe7a21 | 2704 | |
6ba2edb7 TM |
2705 | if (can_send) { |
2706 | if ((qs->sstream = ossl_quic_sstream_new(INIT_APP_BUF_LEN)) == NULL) | |
2707 | goto err; | |
2708 | ossl_quic_sstream_set_cleanse(qs->sstream, cleanse); | |
2709 | } | |
e8fe7a21 | 2710 | |
a02571a0 TM |
2711 | if (can_recv) { |
2712 | if ((qs->rstream = ossl_quic_rstream_new(NULL, NULL, 0)) == NULL) | |
2713 | goto err; | |
6ba2edb7 | 2714 | ossl_quic_rstream_set_cleanse(qs->rstream, cleanse); |
a02571a0 | 2715 | } |
e8fe7a21 HL |
2716 | |
2717 | /* TXFC */ | |
2718 | if (!ossl_quic_txfc_init(&qs->txfc, &ch->conn_txfc)) | |
2719 | goto err; | |
2720 | ||
2721 | if (ch->got_remote_transport_params) { | |
2722 | /* | |
2723 | * If we already got peer TPs we need to apply the initial CWM credit | |
2724 | * now. If we didn't already get peer TPs this will be done | |
2725 | * automatically for all extant streams when we do. | |
2726 | */ | |
2727 | if (can_send) { | |
2728 | uint64_t cwm; | |
2729 | ||
2730 | if (is_uni) | |
2731 | cwm = ch->rx_init_max_stream_data_uni; | |
2732 | else if (local_init) | |
2733 | cwm = ch->rx_init_max_stream_data_bidi_local; | |
2734 | else | |
2735 | cwm = ch->rx_init_max_stream_data_bidi_remote; | |
2736 | ||
2737 | ossl_quic_txfc_bump_cwm(&qs->txfc, cwm); | |
2738 | } | |
2739 | } | |
2740 | ||
2741 | /* RXFC */ | |
2742 | if (!can_recv) | |
2743 | rxfc_wnd = 0; | |
2744 | else if (is_uni) | |
2745 | rxfc_wnd = ch->tx_init_max_stream_data_uni; | |
2746 | else if (local_init) | |
2747 | rxfc_wnd = ch->tx_init_max_stream_data_bidi_local; | |
2748 | else | |
2749 | rxfc_wnd = ch->tx_init_max_stream_data_bidi_remote; | |
2750 | ||
2751 | if (!ossl_quic_rxfc_init(&qs->rxfc, &ch->conn_rxfc, | |
2752 | rxfc_wnd, | |
2753 | DEFAULT_STREAM_RXFC_MAX_WND_MUL * rxfc_wnd, | |
2754 | get_time, ch)) | |
2755 | goto err; | |
2756 | ||
2757 | return 1; | |
2758 | ||
2759 | err: | |
2760 | ossl_quic_sstream_free(qs->sstream); | |
2761 | qs->sstream = NULL; | |
2762 | ossl_quic_rstream_free(qs->rstream); | |
2763 | qs->rstream = NULL; | |
2764 | return 0; | |
2765 | } | |
2766 | ||
f20fdd16 | 2767 | QUIC_STREAM *ossl_quic_channel_new_stream_local(QUIC_CHANNEL *ch, int is_uni) |
2dbc39de HL |
2768 | { |
2769 | QUIC_STREAM *qs; | |
22b1a96f | 2770 | int type; |
2dbc39de HL |
2771 | uint64_t stream_id, *p_next_ordinal; |
2772 | ||
22b1a96f HL |
2773 | type = ch->is_server ? QUIC_STREAM_INITIATOR_SERVER |
2774 | : QUIC_STREAM_INITIATOR_CLIENT; | |
2dbc39de HL |
2775 | |
2776 | if (is_uni) { | |
2777 | p_next_ordinal = &ch->next_local_stream_ordinal_uni; | |
2778 | type |= QUIC_STREAM_DIR_UNI; | |
2779 | } else { | |
2780 | p_next_ordinal = &ch->next_local_stream_ordinal_bidi; | |
2781 | type |= QUIC_STREAM_DIR_BIDI; | |
2782 | } | |
2783 | ||
2784 | if (*p_next_ordinal >= ((uint64_t)1) << 62) | |
2785 | return NULL; | |
2786 | ||
2787 | stream_id = ((*p_next_ordinal) << 2) | type; | |
2788 | ||
2789 | if ((qs = ossl_quic_stream_map_alloc(&ch->qsm, stream_id, type)) == NULL) | |
2790 | return NULL; | |
2791 | ||
e8fe7a21 HL |
2792 | /* Locally-initiated stream, so we always want a send buffer. */ |
2793 | if (!ch_init_new_stream(ch, qs, /*can_send=*/1, /*can_recv=*/!is_uni)) | |
2794 | goto err; | |
2795 | ||
2dbc39de HL |
2796 | ++*p_next_ordinal; |
2797 | return qs; | |
e8fe7a21 HL |
2798 | |
2799 | err: | |
2800 | ossl_quic_stream_map_release(&ch->qsm, qs); | |
2801 | return NULL; | |
2dbc39de | 2802 | } |
f20fdd16 HL |
2803 | |
2804 | QUIC_STREAM *ossl_quic_channel_new_stream_remote(QUIC_CHANNEL *ch, | |
2805 | uint64_t stream_id) | |
2806 | { | |
2807 | uint64_t peer_role; | |
e8fe7a21 | 2808 | int is_uni; |
f20fdd16 HL |
2809 | QUIC_STREAM *qs; |
2810 | ||
2811 | peer_role = ch->is_server | |
2812 | ? QUIC_STREAM_INITIATOR_CLIENT | |
2813 | : QUIC_STREAM_INITIATOR_SERVER; | |
2814 | ||
2815 | if ((stream_id & QUIC_STREAM_INITIATOR_MASK) != peer_role) | |
2816 | return NULL; | |
2817 | ||
e8fe7a21 HL |
2818 | is_uni = ((stream_id & QUIC_STREAM_DIR_MASK) == QUIC_STREAM_DIR_UNI); |
2819 | ||
f20fdd16 HL |
2820 | qs = ossl_quic_stream_map_alloc(&ch->qsm, stream_id, |
2821 | stream_id & (QUIC_STREAM_INITIATOR_MASK | |
2822 | | QUIC_STREAM_DIR_MASK)); | |
2823 | if (qs == NULL) | |
2824 | return NULL; | |
2825 | ||
e8fe7a21 HL |
2826 | if (!ch_init_new_stream(ch, qs, /*can_send=*/!is_uni, /*can_recv=*/1)) |
2827 | goto err; | |
2828 | ||
995ff282 HL |
2829 | if (ch->incoming_stream_auto_reject) |
2830 | ossl_quic_channel_reject_stream(ch, qs); | |
2831 | else | |
2832 | ossl_quic_stream_map_push_accept_queue(&ch->qsm, qs); | |
2833 | ||
f20fdd16 | 2834 | return qs; |
e8fe7a21 HL |
2835 | |
2836 | err: | |
2837 | ossl_quic_stream_map_release(&ch->qsm, qs); | |
2838 | return NULL; | |
f20fdd16 | 2839 | } |
995ff282 HL |
2840 | |
2841 | void ossl_quic_channel_set_incoming_stream_auto_reject(QUIC_CHANNEL *ch, | |
2842 | int enable, | |
2843 | uint64_t aec) | |
2844 | { | |
2845 | ch->incoming_stream_auto_reject = (enable != 0); | |
2846 | ch->incoming_stream_auto_reject_aec = aec; | |
2847 | } | |
2848 | ||
2849 | void ossl_quic_channel_reject_stream(QUIC_CHANNEL *ch, QUIC_STREAM *qs) | |
2850 | { | |
e8b9f632 HL |
2851 | ossl_quic_stream_map_stop_sending_recv_part(&ch->qsm, qs, |
2852 | ch->incoming_stream_auto_reject_aec); | |
995ff282 | 2853 | |
e8b9f632 HL |
2854 | ossl_quic_stream_map_reset_stream_send_part(&ch->qsm, qs, |
2855 | ch->incoming_stream_auto_reject_aec); | |
995ff282 HL |
2856 | qs->deleted = 1; |
2857 | ||
2858 | ossl_quic_stream_map_update_state(&ch->qsm, qs); | |
2859 | } | |
bbc97540 TM |
2860 | |
2861 | /* Replace local connection ID in TXP and DEMUX for testing purposes. */ | |
2862 | int ossl_quic_channel_replace_local_cid(QUIC_CHANNEL *ch, | |
2863 | const QUIC_CONN_ID *conn_id) | |
2864 | { | |
2865 | /* Remove the current local CID from the DEMUX. */ | |
2866 | if (!ossl_qrx_remove_dst_conn_id(ch->qrx, &ch->cur_local_cid)) | |
2867 | return 0; | |
2868 | ch->cur_local_cid = *conn_id; | |
2869 | /* Set in the TXP, used only for long header packets. */ | |
2870 | if (!ossl_quic_tx_packetiser_set_cur_scid(ch->txp, &ch->cur_local_cid)) | |
2871 | return 0; | |
2872 | /* Register our new local CID in the DEMUX. */ | |
2873 | if (!ossl_qrx_add_dst_conn_id(ch->qrx, &ch->cur_local_cid)) | |
2874 | return 0; | |
2875 | return 1; | |
2876 | } | |
5cf99b40 MC |
2877 | |
2878 | void ossl_quic_channel_set_msg_callback(QUIC_CHANNEL *ch, | |
2879 | ossl_msg_cb msg_callback, | |
c2786c8e | 2880 | SSL *msg_callback_ssl) |
5cf99b40 MC |
2881 | { |
2882 | ch->msg_callback = msg_callback; | |
c2786c8e MC |
2883 | ch->msg_callback_ssl = msg_callback_ssl; |
2884 | ossl_qtx_set_msg_callback(ch->qtx, msg_callback, msg_callback_ssl); | |
5cf99b40 | 2885 | ossl_quic_tx_packetiser_set_msg_callback(ch->txp, msg_callback, |
c2786c8e MC |
2886 | msg_callback_ssl); |
2887 | ossl_qrx_set_msg_callback(ch->qrx, msg_callback, msg_callback_ssl); | |
5cf99b40 MC |
2888 | } |
2889 | ||
2890 | void ossl_quic_channel_set_msg_callback_arg(QUIC_CHANNEL *ch, | |
2891 | void *msg_callback_arg) | |
2892 | { | |
2893 | ch->msg_callback_arg = msg_callback_arg; | |
2894 | ossl_qtx_set_msg_callback_arg(ch->qtx, msg_callback_arg); | |
2895 | ossl_quic_tx_packetiser_set_msg_callback_arg(ch->txp, msg_callback_arg); | |
2896 | ossl_qrx_set_msg_callback_arg(ch->qrx, msg_callback_arg); | |
2897 | } | |
16f3b542 HL |
2898 | |
2899 | void ossl_quic_channel_set_txku_threshold_override(QUIC_CHANNEL *ch, | |
2900 | uint64_t tx_pkt_threshold) | |
2901 | { | |
2902 | ch->txku_threshold_override = tx_pkt_threshold; | |
2903 | } | |
2904 | ||
2905 | uint64_t ossl_quic_channel_get_tx_key_epoch(QUIC_CHANNEL *ch) | |
2906 | { | |
2907 | return ossl_qtx_get_key_epoch(ch->qtx); | |
2908 | } | |
2909 | ||
2910 | uint64_t ossl_quic_channel_get_rx_key_epoch(QUIC_CHANNEL *ch) | |
2911 | { | |
2912 | return ossl_qrx_get_key_epoch(ch->qrx); | |
2913 | } | |
692a3cab HL |
2914 | |
2915 | int ossl_quic_channel_trigger_txku(QUIC_CHANNEL *ch) | |
2916 | { | |
2917 | if (!txku_allowed(ch)) | |
2918 | return 0; | |
2919 | ||
2920 | ch->ku_locally_initiated = 1; | |
2921 | ch_trigger_txku(ch); | |
2922 | return 1; | |
2923 | } |