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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); | |
69 | static int ch_retry(QUIC_CHANNEL *ch, | |
70 | const unsigned char *retry_token, | |
71 | size_t retry_token_len, | |
72 | const QUIC_CONN_ID *retry_scid); | |
73 | static void ch_update_idle(QUIC_CHANNEL *ch); | |
74 | static int ch_discard_el(QUIC_CHANNEL *ch, | |
75 | uint32_t enc_level); | |
76 | static void ch_on_idle_timeout(QUIC_CHANNEL *ch); | |
77 | static void ch_update_idle(QUIC_CHANNEL *ch); | |
3b1ab5a3 | 78 | static void ch_update_ping_deadline(QUIC_CHANNEL *ch); |
df15e990 | 79 | static void ch_raise_net_error(QUIC_CHANNEL *ch); |
f538b421 HL |
80 | static void ch_on_terminating_timeout(QUIC_CHANNEL *ch); |
81 | static void ch_start_terminating(QUIC_CHANNEL *ch, | |
df15e990 HL |
82 | const QUIC_TERMINATE_CAUSE *tcause, |
83 | int force_immediate); | |
b1b06da2 HL |
84 | static void ch_default_packet_handler(QUIC_URXE *e, void *arg); |
85 | static int ch_server_on_new_conn(QUIC_CHANNEL *ch, const BIO_ADDR *peer, | |
86 | const QUIC_CONN_ID *peer_scid, | |
87 | const QUIC_CONN_ID *peer_dcid); | |
f538b421 HL |
88 | |
89 | static int gen_rand_conn_id(OSSL_LIB_CTX *libctx, size_t len, QUIC_CONN_ID *cid) | |
90 | { | |
91 | if (len > QUIC_MAX_CONN_ID_LEN) | |
92 | return 0; | |
93 | ||
94 | cid->id_len = (unsigned char)len; | |
95 | ||
96 | if (RAND_bytes_ex(libctx, cid->id, len, len * 8) != 1) { | |
97 | cid->id_len = 0; | |
98 | return 0; | |
99 | } | |
100 | ||
101 | return 1; | |
102 | } | |
103 | ||
104 | /* | |
105 | * QUIC Channel Initialization and Teardown | |
106 | * ======================================== | |
107 | */ | |
0815b725 HL |
108 | #define DEFAULT_INIT_CONN_RXFC_WND ( 2 * 1024 * 1024) |
109 | #define DEFAULT_MAX_CONN_RXFC_WND (10 * 1024 * 1024) | |
110 | ||
111 | #define DEFAULT_INIT_STREAM_RXFC_WND ( 2 * 1024 * 1024) | |
112 | #define DEFAULT_MAX_STREAM_RXFC_WND (10 * 1024 * 1024) | |
113 | ||
f538b421 HL |
114 | static int ch_init(QUIC_CHANNEL *ch) |
115 | { | |
116 | OSSL_QUIC_TX_PACKETISER_ARGS txp_args = {0}; | |
117 | OSSL_QTX_ARGS qtx_args = {0}; | |
118 | OSSL_QRX_ARGS qrx_args = {0}; | |
2723d705 | 119 | QUIC_TLS_ARGS tls_args = {0}; |
f538b421 | 120 | uint32_t pn_space; |
b1b06da2 | 121 | size_t rx_short_cid_len = ch->is_server ? INIT_DCID_LEN : 0; |
f538b421 | 122 | |
b1b06da2 HL |
123 | /* For clients, generate our initial DCID. */ |
124 | if (!ch->is_server | |
125 | && !gen_rand_conn_id(ch->libctx, INIT_DCID_LEN, &ch->init_dcid)) | |
f538b421 HL |
126 | goto err; |
127 | ||
128 | /* We plug in a network write BIO to the QTX later when we get one. */ | |
c2212dc1 | 129 | qtx_args.libctx = ch->libctx; |
f538b421 HL |
130 | qtx_args.mdpl = QUIC_MIN_INITIAL_DGRAM_LEN; |
131 | ch->rx_max_udp_payload_size = qtx_args.mdpl; | |
132 | ||
133 | ch->qtx = ossl_qtx_new(&qtx_args); | |
134 | if (ch->qtx == NULL) | |
135 | goto err; | |
136 | ||
137 | ch->txpim = ossl_quic_txpim_new(); | |
138 | if (ch->txpim == NULL) | |
139 | goto err; | |
140 | ||
141 | ch->cfq = ossl_quic_cfq_new(); | |
142 | if (ch->cfq == NULL) | |
143 | goto err; | |
144 | ||
145 | if (!ossl_quic_txfc_init(&ch->conn_txfc, NULL)) | |
146 | goto err; | |
147 | ||
0815b725 HL |
148 | /* |
149 | * Note: The TP we transmit governs what the peer can transmit and thus | |
150 | * applies to the RXFC. | |
151 | */ | |
152 | ch->tx_init_max_stream_data_bidi_local = DEFAULT_INIT_STREAM_RXFC_WND; | |
153 | ch->tx_init_max_stream_data_bidi_remote = DEFAULT_INIT_STREAM_RXFC_WND; | |
154 | ch->tx_init_max_stream_data_uni = DEFAULT_INIT_STREAM_RXFC_WND; | |
155 | ||
f538b421 | 156 | if (!ossl_quic_rxfc_init(&ch->conn_rxfc, NULL, |
0815b725 HL |
157 | DEFAULT_INIT_CONN_RXFC_WND, |
158 | DEFAULT_MAX_CONN_RXFC_WND, | |
b212d554 | 159 | get_time, ch)) |
f538b421 HL |
160 | goto err; |
161 | ||
162 | if (!ossl_statm_init(&ch->statm)) | |
163 | goto err; | |
164 | ||
165 | ch->have_statm = 1; | |
f6f45c55 | 166 | ch->cc_method = &ossl_cc_newreno_method; |
66ec5348 | 167 | if ((ch->cc_data = ch->cc_method->new(get_time, ch)) == NULL) |
f538b421 HL |
168 | goto err; |
169 | ||
b212d554 | 170 | if ((ch->ackm = ossl_ackm_new(get_time, ch, &ch->statm, |
f538b421 HL |
171 | ch->cc_method, ch->cc_data)) == NULL) |
172 | goto err; | |
173 | ||
174 | if (!ossl_quic_stream_map_init(&ch->qsm, get_stream_limit, ch)) | |
175 | goto err; | |
176 | ||
177 | ch->have_qsm = 1; | |
178 | ||
179 | /* We use a zero-length SCID. */ | |
180 | txp_args.cur_dcid = ch->init_dcid; | |
181 | txp_args.ack_delay_exponent = 3; | |
182 | txp_args.qtx = ch->qtx; | |
183 | txp_args.txpim = ch->txpim; | |
184 | txp_args.cfq = ch->cfq; | |
185 | txp_args.ackm = ch->ackm; | |
186 | txp_args.qsm = &ch->qsm; | |
187 | txp_args.conn_txfc = &ch->conn_txfc; | |
188 | txp_args.conn_rxfc = &ch->conn_rxfc; | |
189 | txp_args.cc_method = ch->cc_method; | |
190 | txp_args.cc_data = ch->cc_data; | |
191 | txp_args.now = get_time; | |
b212d554 | 192 | txp_args.now_arg = ch; |
f538b421 HL |
193 | for (pn_space = QUIC_PN_SPACE_INITIAL; pn_space < QUIC_PN_SPACE_NUM; ++pn_space) { |
194 | ch->crypto_send[pn_space] = ossl_quic_sstream_new(INIT_CRYPTO_BUF_LEN); | |
195 | if (ch->crypto_send[pn_space] == NULL) | |
196 | goto err; | |
197 | ||
198 | txp_args.crypto[pn_space] = ch->crypto_send[pn_space]; | |
199 | } | |
200 | ||
201 | ch->txp = ossl_quic_tx_packetiser_new(&txp_args); | |
202 | if (ch->txp == NULL) | |
203 | goto err; | |
204 | ||
b1b06da2 HL |
205 | if ((ch->demux = ossl_quic_demux_new(/*BIO=*/NULL, |
206 | /*Short CID Len=*/rx_short_cid_len, | |
b212d554 | 207 | get_time, ch)) == NULL) |
f538b421 HL |
208 | goto err; |
209 | ||
b1b06da2 HL |
210 | /* |
211 | * If we are a server, setup our handler for packets not corresponding to | |
212 | * any known DCID on our end. This is for handling clients establishing new | |
213 | * connections. | |
214 | */ | |
215 | if (ch->is_server) | |
216 | ossl_quic_demux_set_default_handler(ch->demux, | |
217 | ch_default_packet_handler, | |
218 | ch); | |
219 | ||
c2212dc1 | 220 | qrx_args.libctx = ch->libctx; |
f538b421 | 221 | qrx_args.demux = ch->demux; |
b1b06da2 | 222 | qrx_args.short_conn_id_len = rx_short_cid_len; |
f538b421 HL |
223 | qrx_args.max_deferred = 32; |
224 | ||
225 | if ((ch->qrx = ossl_qrx_new(&qrx_args)) == NULL) | |
226 | goto err; | |
227 | ||
228 | if (!ossl_qrx_set_early_validation_cb(ch->qrx, | |
229 | rx_early_validate, | |
230 | ch)) | |
231 | goto err; | |
232 | ||
b1b06da2 | 233 | if (!ch->is_server && !ossl_qrx_add_dst_conn_id(ch->qrx, &txp_args.cur_scid)) |
f538b421 HL |
234 | goto err; |
235 | ||
236 | for (pn_space = QUIC_PN_SPACE_INITIAL; pn_space < QUIC_PN_SPACE_NUM; ++pn_space) { | |
2113ea58 | 237 | ch->crypto_recv[pn_space] = ossl_quic_rstream_new(NULL, NULL, 0); |
f538b421 HL |
238 | if (ch->crypto_recv[pn_space] == NULL) |
239 | goto err; | |
240 | } | |
241 | ||
2723d705 MC |
242 | /* Plug in the TLS handshake layer. */ |
243 | tls_args.s = ch->tls; | |
244 | tls_args.crypto_send_cb = ch_on_crypto_send; | |
245 | tls_args.crypto_send_cb_arg = ch; | |
7257188b MC |
246 | tls_args.crypto_recv_rcd_cb = ch_on_crypto_recv_record; |
247 | tls_args.crypto_recv_rcd_cb_arg = ch; | |
248 | tls_args.crypto_release_rcd_cb = ch_on_crypto_release_record; | |
249 | tls_args.crypto_release_rcd_cb_arg = ch; | |
2723d705 MC |
250 | tls_args.yield_secret_cb = ch_on_handshake_yield_secret; |
251 | tls_args.yield_secret_cb_arg = ch; | |
252 | tls_args.got_transport_params_cb = ch_on_transport_params; | |
253 | tls_args.got_transport_params_cb_arg= ch; | |
254 | tls_args.handshake_complete_cb = ch_on_handshake_complete; | |
255 | tls_args.handshake_complete_cb_arg = ch; | |
256 | tls_args.alert_cb = ch_on_handshake_alert; | |
257 | tls_args.alert_cb_arg = ch; | |
258 | tls_args.is_server = ch->is_server; | |
259 | ||
260 | if ((ch->qtls = ossl_quic_tls_new(&tls_args)) == NULL) | |
f538b421 HL |
261 | goto err; |
262 | ||
4648eac5 HL |
263 | ch->rx_max_ack_delay = QUIC_DEFAULT_MAX_ACK_DELAY; |
264 | ch->rx_ack_delay_exp = QUIC_DEFAULT_ACK_DELAY_EXP; | |
265 | ch->rx_active_conn_id_limit = QUIC_MIN_ACTIVE_CONN_ID_LIMIT; | |
266 | ch->max_idle_timeout = QUIC_DEFAULT_IDLE_TIMEOUT; | |
267 | ch->tx_enc_level = QUIC_ENC_LEVEL_INITIAL; | |
268 | ch->rx_enc_level = QUIC_ENC_LEVEL_INITIAL; | |
269 | ||
f538b421 HL |
270 | /* |
271 | * Determine the QUIC Transport Parameters and serialize the transport | |
272 | * parameters block. (For servers, we do this later as we must defer | |
273 | * generation until we have received the client's transport parameters.) | |
274 | */ | |
275 | if (!ch->is_server && !ch_generate_transport_params(ch)) | |
276 | goto err; | |
277 | ||
f538b421 HL |
278 | ch_update_idle(ch); |
279 | ossl_quic_reactor_init(&ch->rtor, ch_tick, ch, | |
280 | ch_determine_next_tick_deadline(ch)); | |
281 | return 1; | |
282 | ||
283 | err: | |
284 | ch_cleanup(ch); | |
285 | return 0; | |
286 | } | |
287 | ||
288 | static void ch_cleanup(QUIC_CHANNEL *ch) | |
289 | { | |
290 | uint32_t pn_space; | |
291 | ||
292 | if (ch->ackm != NULL) | |
293 | for (pn_space = QUIC_PN_SPACE_INITIAL; | |
294 | pn_space < QUIC_PN_SPACE_NUM; | |
295 | ++pn_space) | |
296 | ossl_ackm_on_pkt_space_discarded(ch->ackm, pn_space); | |
297 | ||
298 | ossl_quic_tx_packetiser_free(ch->txp); | |
299 | ossl_quic_txpim_free(ch->txpim); | |
300 | ossl_quic_cfq_free(ch->cfq); | |
301 | ossl_qtx_free(ch->qtx); | |
302 | if (ch->cc_data != NULL) | |
303 | ch->cc_method->free(ch->cc_data); | |
304 | if (ch->have_statm) | |
305 | ossl_statm_destroy(&ch->statm); | |
306 | ossl_ackm_free(ch->ackm); | |
307 | ||
f538b421 HL |
308 | if (ch->have_qsm) |
309 | ossl_quic_stream_map_cleanup(&ch->qsm); | |
310 | ||
311 | for (pn_space = QUIC_PN_SPACE_INITIAL; pn_space < QUIC_PN_SPACE_NUM; ++pn_space) { | |
312 | ossl_quic_sstream_free(ch->crypto_send[pn_space]); | |
313 | ossl_quic_rstream_free(ch->crypto_recv[pn_space]); | |
314 | } | |
315 | ||
316 | ossl_qrx_pkt_release(ch->qrx_pkt); | |
317 | ch->qrx_pkt = NULL; | |
318 | ||
2723d705 | 319 | ossl_quic_tls_free(ch->qtls); |
f538b421 HL |
320 | ossl_qrx_free(ch->qrx); |
321 | ossl_quic_demux_free(ch->demux); | |
322 | OPENSSL_free(ch->local_transport_params); | |
f538b421 HL |
323 | } |
324 | ||
325 | QUIC_CHANNEL *ossl_quic_channel_new(const QUIC_CHANNEL_ARGS *args) | |
326 | { | |
327 | QUIC_CHANNEL *ch = NULL; | |
328 | ||
329 | if ((ch = OPENSSL_zalloc(sizeof(*ch))) == NULL) | |
330 | return NULL; | |
331 | ||
332 | ch->libctx = args->libctx; | |
333 | ch->propq = args->propq; | |
334 | ch->is_server = args->is_server; | |
2723d705 | 335 | ch->tls = args->tls; |
4847599b | 336 | ch->mutex = args->mutex; |
b212d554 HL |
337 | ch->now_cb = args->now_cb; |
338 | ch->now_cb_arg = args->now_cb_arg; | |
f538b421 HL |
339 | |
340 | if (!ch_init(ch)) { | |
341 | OPENSSL_free(ch); | |
342 | return NULL; | |
343 | } | |
344 | ||
345 | return ch; | |
346 | } | |
347 | ||
348 | void ossl_quic_channel_free(QUIC_CHANNEL *ch) | |
349 | { | |
350 | if (ch == NULL) | |
351 | return; | |
352 | ||
353 | ch_cleanup(ch); | |
354 | OPENSSL_free(ch); | |
355 | } | |
356 | ||
14e31409 MC |
357 | /* Set mutator callbacks for test framework support */ |
358 | int ossl_quic_channel_set_mutator(QUIC_CHANNEL *ch, | |
359 | ossl_mutate_packet_cb mutatecb, | |
360 | ossl_finish_mutate_cb finishmutatecb, | |
361 | void *mutatearg) | |
362 | { | |
363 | if (ch->qtx == NULL) | |
364 | return 0; | |
365 | ||
366 | ossl_qtx_set_mutator(ch->qtx, mutatecb, finishmutatecb, mutatearg); | |
367 | return 1; | |
368 | } | |
369 | ||
f538b421 HL |
370 | int ossl_quic_channel_get_peer_addr(QUIC_CHANNEL *ch, BIO_ADDR *peer_addr) |
371 | { | |
372 | *peer_addr = ch->cur_peer_addr; | |
373 | return 1; | |
374 | } | |
375 | ||
376 | int ossl_quic_channel_set_peer_addr(QUIC_CHANNEL *ch, const BIO_ADDR *peer_addr) | |
377 | { | |
378 | ch->cur_peer_addr = *peer_addr; | |
379 | return 1; | |
380 | } | |
381 | ||
382 | QUIC_REACTOR *ossl_quic_channel_get_reactor(QUIC_CHANNEL *ch) | |
383 | { | |
384 | return &ch->rtor; | |
385 | } | |
386 | ||
387 | QUIC_STREAM_MAP *ossl_quic_channel_get_qsm(QUIC_CHANNEL *ch) | |
388 | { | |
389 | return &ch->qsm; | |
390 | } | |
391 | ||
392 | OSSL_STATM *ossl_quic_channel_get_statm(QUIC_CHANNEL *ch) | |
393 | { | |
394 | return &ch->statm; | |
395 | } | |
396 | ||
397 | QUIC_STREAM *ossl_quic_channel_get_stream_by_id(QUIC_CHANNEL *ch, | |
398 | uint64_t stream_id) | |
399 | { | |
400 | return ossl_quic_stream_map_get_by_id(&ch->qsm, stream_id); | |
401 | } | |
402 | ||
403 | int ossl_quic_channel_is_active(const QUIC_CHANNEL *ch) | |
404 | { | |
405 | return ch != NULL && ch->state == QUIC_CHANNEL_STATE_ACTIVE; | |
406 | } | |
407 | ||
c12e1113 | 408 | int ossl_quic_channel_is_terminating(const QUIC_CHANNEL *ch) |
f538b421 | 409 | { |
149a8e6c | 410 | if (ch->state == QUIC_CHANNEL_STATE_TERMINATING_CLOSING |
c12e1113 | 411 | || ch->state == QUIC_CHANNEL_STATE_TERMINATING_DRAINING) |
149a8e6c | 412 | return 1; |
c12e1113 | 413 | |
149a8e6c | 414 | return 0; |
f538b421 HL |
415 | } |
416 | ||
c12e1113 | 417 | int ossl_quic_channel_is_terminated(const QUIC_CHANNEL *ch) |
f538b421 | 418 | { |
c12e1113 | 419 | if (ch->state == QUIC_CHANNEL_STATE_TERMINATED) |
149a8e6c | 420 | return 1; |
c12e1113 | 421 | |
149a8e6c | 422 | return 0; |
f538b421 HL |
423 | } |
424 | ||
c12e1113 MC |
425 | int ossl_quic_channel_is_term_any(const QUIC_CHANNEL *ch) |
426 | { | |
427 | return ossl_quic_channel_is_terminating(ch) | |
428 | || ossl_quic_channel_is_terminated(ch); | |
429 | } | |
430 | ||
431 | QUIC_TERMINATE_CAUSE ossl_quic_channel_get_terminate_cause(const QUIC_CHANNEL *ch) | |
f538b421 | 432 | { |
c12e1113 | 433 | return ch->terminate_cause; |
f538b421 HL |
434 | } |
435 | ||
436 | int ossl_quic_channel_is_handshake_complete(const QUIC_CHANNEL *ch) | |
437 | { | |
438 | return ch->handshake_complete; | |
439 | } | |
440 | ||
ce8f20b6 MC |
441 | int ossl_quic_channel_is_handshake_confirmed(const QUIC_CHANNEL *ch) |
442 | { | |
443 | return ch->handshake_confirmed; | |
444 | } | |
445 | ||
553a4e00 HL |
446 | QUIC_DEMUX *ossl_quic_channel_get0_demux(QUIC_CHANNEL *ch) |
447 | { | |
448 | return ch->demux; | |
449 | } | |
450 | ||
fb2245c4 HL |
451 | CRYPTO_MUTEX *ossl_quic_channel_get_mutex(QUIC_CHANNEL *ch) |
452 | { | |
453 | return ch->mutex; | |
454 | } | |
455 | ||
f538b421 HL |
456 | /* |
457 | * QUIC Channel: Callbacks from Miscellaneous Subsidiary Components | |
458 | * ================================================================ | |
459 | */ | |
460 | ||
461 | /* Used by various components. */ | |
462 | static OSSL_TIME get_time(void *arg) | |
463 | { | |
b212d554 HL |
464 | QUIC_CHANNEL *ch = arg; |
465 | ||
466 | if (ch->now_cb == NULL) | |
467 | return ossl_time_now(); | |
468 | ||
469 | return ch->now_cb(ch->now_cb_arg); | |
f538b421 HL |
470 | } |
471 | ||
472 | /* Used by QSM. */ | |
473 | static uint64_t get_stream_limit(int uni, void *arg) | |
474 | { | |
475 | QUIC_CHANNEL *ch = arg; | |
476 | ||
477 | return uni ? ch->max_local_streams_uni : ch->max_local_streams_bidi; | |
478 | } | |
479 | ||
480 | /* | |
481 | * Called by QRX to determine if a packet is potentially invalid before trying | |
482 | * to decrypt it. | |
483 | */ | |
484 | static int rx_early_validate(QUIC_PN pn, int pn_space, void *arg) | |
485 | { | |
486 | QUIC_CHANNEL *ch = arg; | |
487 | ||
488 | /* Potential duplicates should not be processed. */ | |
489 | if (!ossl_ackm_is_rx_pn_processable(ch->ackm, pn, pn_space)) | |
490 | return 0; | |
491 | ||
492 | return 1; | |
493 | } | |
494 | ||
495 | /* | |
496 | * QUIC Channel: Handshake Layer Event Handling | |
497 | * ============================================ | |
498 | */ | |
499 | static int ch_on_crypto_send(const unsigned char *buf, size_t buf_len, | |
500 | size_t *consumed, void *arg) | |
501 | { | |
502 | int ret; | |
503 | QUIC_CHANNEL *ch = arg; | |
504 | uint32_t enc_level = ch->tx_enc_level; | |
505 | uint32_t pn_space = ossl_quic_enc_level_to_pn_space(enc_level); | |
506 | QUIC_SSTREAM *sstream = ch->crypto_send[pn_space]; | |
507 | ||
508 | if (!ossl_assert(sstream != NULL)) | |
509 | return 0; | |
510 | ||
511 | ret = ossl_quic_sstream_append(sstream, buf, buf_len, consumed); | |
512 | return ret; | |
513 | } | |
514 | ||
515 | static int crypto_ensure_empty(QUIC_RSTREAM *rstream) | |
516 | { | |
517 | size_t avail = 0; | |
518 | int is_fin = 0; | |
519 | ||
520 | if (rstream == NULL) | |
521 | return 1; | |
522 | ||
523 | if (!ossl_quic_rstream_available(rstream, &avail, &is_fin)) | |
524 | return 0; | |
525 | ||
526 | return avail == 0; | |
527 | } | |
528 | ||
7257188b MC |
529 | static int ch_on_crypto_recv_record(const unsigned char **buf, |
530 | size_t *bytes_read, void *arg) | |
f538b421 HL |
531 | { |
532 | QUIC_CHANNEL *ch = arg; | |
533 | QUIC_RSTREAM *rstream; | |
534 | int is_fin = 0; /* crypto stream is never finished, so we don't use this */ | |
535 | uint32_t i; | |
536 | ||
537 | /* | |
538 | * After we move to a later EL we must not allow our peer to send any new | |
539 | * bytes in the crypto stream on a previous EL. Retransmissions of old bytes | |
540 | * are allowed. | |
541 | * | |
542 | * In practice we will only move to a new EL when we have consumed all bytes | |
543 | * which should be sent on the crypto stream at a previous EL. For example, | |
544 | * the Handshake EL should not be provisioned until we have completely | |
545 | * consumed a TLS 1.3 ServerHello. Thus when we provision an EL the output | |
546 | * of ossl_quic_rstream_available() should be 0 for all lower ELs. Thus if a | |
547 | * given EL is available we simply ensure we have not received any further | |
548 | * bytes at a lower EL. | |
549 | */ | |
45ecfc9b | 550 | for (i = QUIC_ENC_LEVEL_INITIAL; i < ch->rx_enc_level; ++i) |
f538b421 HL |
551 | if (i != QUIC_ENC_LEVEL_0RTT && |
552 | !crypto_ensure_empty(ch->crypto_recv[ossl_quic_enc_level_to_pn_space(i)])) { | |
553 | /* Protocol violation (RFC 9001 s. 4.1.3) */ | |
554 | ossl_quic_channel_raise_protocol_error(ch, QUIC_ERR_PROTOCOL_VIOLATION, | |
555 | OSSL_QUIC_FRAME_TYPE_CRYPTO, | |
556 | "crypto stream data in wrong EL"); | |
557 | return 0; | |
558 | } | |
559 | ||
45ecfc9b | 560 | rstream = ch->crypto_recv[ossl_quic_enc_level_to_pn_space(ch->rx_enc_level)]; |
f538b421 HL |
561 | if (rstream == NULL) |
562 | return 0; | |
563 | ||
7257188b MC |
564 | return ossl_quic_rstream_get_record(rstream, buf, bytes_read, |
565 | &is_fin); | |
566 | } | |
567 | ||
568 | static int ch_on_crypto_release_record(size_t bytes_read, void *arg) | |
569 | { | |
570 | QUIC_CHANNEL *ch = arg; | |
571 | QUIC_RSTREAM *rstream; | |
572 | ||
573 | rstream = ch->crypto_recv[ossl_quic_enc_level_to_pn_space(ch->rx_enc_level)]; | |
574 | if (rstream == NULL) | |
575 | return 0; | |
576 | ||
577 | return ossl_quic_rstream_release_record(rstream, bytes_read); | |
f538b421 HL |
578 | } |
579 | ||
580 | static int ch_on_handshake_yield_secret(uint32_t enc_level, int direction, | |
581 | uint32_t suite_id, EVP_MD *md, | |
582 | const unsigned char *secret, | |
583 | size_t secret_len, | |
584 | void *arg) | |
585 | { | |
586 | QUIC_CHANNEL *ch = arg; | |
587 | uint32_t i; | |
588 | ||
589 | if (enc_level < QUIC_ENC_LEVEL_HANDSHAKE || enc_level >= QUIC_ENC_LEVEL_NUM) | |
590 | /* Invalid EL. */ | |
591 | return 0; | |
592 | ||
f538b421 HL |
593 | |
594 | if (direction) { | |
595 | /* TX */ | |
45ecfc9b MC |
596 | if (enc_level <= ch->tx_enc_level) |
597 | /* | |
9f0ade7c HL |
598 | * Does not make sense for us to try and provision an EL we have already |
599 | * attained. | |
600 | */ | |
45ecfc9b MC |
601 | return 0; |
602 | ||
f538b421 HL |
603 | if (!ossl_qtx_provide_secret(ch->qtx, enc_level, |
604 | suite_id, md, | |
605 | secret, secret_len)) | |
606 | return 0; | |
607 | ||
608 | ch->tx_enc_level = enc_level; | |
609 | } else { | |
610 | /* RX */ | |
45ecfc9b MC |
611 | if (enc_level <= ch->rx_enc_level) |
612 | /* | |
9f0ade7c HL |
613 | * Does not make sense for us to try and provision an EL we have already |
614 | * attained. | |
615 | */ | |
45ecfc9b MC |
616 | return 0; |
617 | ||
618 | /* | |
9f0ade7c HL |
619 | * Ensure all crypto streams for previous ELs are now empty of available |
620 | * data. | |
621 | */ | |
45ecfc9b | 622 | for (i = QUIC_ENC_LEVEL_INITIAL; i < enc_level; ++i) |
e28f512f | 623 | if (!crypto_ensure_empty(ch->crypto_recv[ossl_quic_enc_level_to_pn_space(i)])) { |
45ecfc9b MC |
624 | /* Protocol violation (RFC 9001 s. 4.1.3) */ |
625 | ossl_quic_channel_raise_protocol_error(ch, QUIC_ERR_PROTOCOL_VIOLATION, | |
626 | OSSL_QUIC_FRAME_TYPE_CRYPTO, | |
627 | "crypto stream data in wrong EL"); | |
628 | return 0; | |
629 | } | |
630 | ||
f538b421 HL |
631 | if (!ossl_qrx_provide_secret(ch->qrx, enc_level, |
632 | suite_id, md, | |
633 | secret, secret_len)) | |
634 | return 0; | |
92282a17 HL |
635 | |
636 | ch->have_new_rx_secret = 1; | |
45ecfc9b | 637 | ch->rx_enc_level = enc_level; |
f538b421 HL |
638 | } |
639 | ||
640 | return 1; | |
641 | } | |
642 | ||
643 | static int ch_on_handshake_complete(void *arg) | |
644 | { | |
645 | QUIC_CHANNEL *ch = arg; | |
646 | ||
e28f512f | 647 | if (!ossl_assert(!ch->handshake_complete)) |
f538b421 HL |
648 | return 0; /* this should not happen twice */ |
649 | ||
650 | if (!ossl_assert(ch->tx_enc_level == QUIC_ENC_LEVEL_1RTT)) | |
651 | return 0; | |
652 | ||
62d0da12 | 653 | if (!ch->got_remote_transport_params) { |
f538b421 HL |
654 | /* |
655 | * Was not a valid QUIC handshake if we did not get valid transport | |
656 | * params. | |
657 | */ | |
62d0da12 MC |
658 | ossl_quic_channel_raise_protocol_error(ch, QUIC_ERR_PROTOCOL_VIOLATION, |
659 | OSSL_QUIC_FRAME_TYPE_CRYPTO, | |
660 | "no transport parameters received"); | |
f538b421 | 661 | return 0; |
62d0da12 | 662 | } |
f538b421 HL |
663 | |
664 | /* Don't need transport parameters anymore. */ | |
665 | OPENSSL_free(ch->local_transport_params); | |
666 | ch->local_transport_params = NULL; | |
667 | ||
668 | /* Tell TXP the handshake is complete. */ | |
669 | ossl_quic_tx_packetiser_notify_handshake_complete(ch->txp); | |
670 | ||
671 | ch->handshake_complete = 1; | |
b1b06da2 HL |
672 | |
673 | if (ch->is_server) { | |
674 | /* | |
675 | * On the server, the handshake is confirmed as soon as it is complete. | |
676 | */ | |
677 | ossl_quic_channel_on_handshake_confirmed(ch); | |
678 | ||
679 | ossl_quic_tx_packetiser_schedule_handshake_done(ch->txp); | |
680 | } | |
681 | ||
f538b421 HL |
682 | return 1; |
683 | } | |
684 | ||
685 | static int ch_on_handshake_alert(void *arg, unsigned char alert_code) | |
686 | { | |
687 | QUIC_CHANNEL *ch = arg; | |
688 | ||
689 | ossl_quic_channel_raise_protocol_error(ch, QUIC_ERR_CRYPTO_ERR_BEGIN + alert_code, | |
690 | 0, "handshake alert"); | |
691 | return 1; | |
692 | } | |
693 | ||
694 | /* | |
695 | * QUIC Channel: Transport Parameter Handling | |
696 | * ========================================== | |
697 | */ | |
698 | ||
699 | /* | |
700 | * Called by handshake layer when we receive QUIC Transport Parameters from the | |
701 | * peer. Note that these are not authenticated until the handshake is marked | |
702 | * as complete. | |
703 | */ | |
3c567a52 HL |
704 | #define TP_REASON_SERVER_ONLY(x) \ |
705 | x " may not be sent by a client" | |
706 | #define TP_REASON_DUP(x) \ | |
707 | x " appears multiple times" | |
708 | #define TP_REASON_MALFORMED(x) \ | |
709 | x " is malformed" | |
710 | #define TP_REASON_EXPECTED_VALUE(x) \ | |
711 | x " does not match expected value" | |
712 | #define TP_REASON_NOT_RETRY(x) \ | |
713 | x " sent when not performing a retry" | |
714 | #define TP_REASON_REQUIRED(x) \ | |
715 | x " was not sent but is required" | |
716 | ||
26ad16ea HL |
717 | static void txfc_bump_cwm_bidi(QUIC_STREAM *s, void *arg) |
718 | { | |
719 | if (!ossl_quic_stream_is_bidi(s) | |
720 | || ossl_quic_stream_is_server_init(s)) | |
721 | return; | |
722 | ||
723 | ossl_quic_txfc_bump_cwm(&s->txfc, *(uint64_t *)arg); | |
724 | } | |
725 | ||
726 | static void txfc_bump_cwm_uni(QUIC_STREAM *s, void *arg) | |
727 | { | |
728 | if (ossl_quic_stream_is_bidi(s) | |
729 | || ossl_quic_stream_is_server_init(s)) | |
730 | return; | |
731 | ||
732 | ossl_quic_txfc_bump_cwm(&s->txfc, *(uint64_t *)arg); | |
733 | } | |
734 | ||
735 | static void do_update(QUIC_STREAM *s, void *arg) | |
736 | { | |
737 | QUIC_CHANNEL *ch = arg; | |
738 | ||
739 | ossl_quic_stream_map_update_state(&ch->qsm, s); | |
740 | } | |
741 | ||
f538b421 HL |
742 | static int ch_on_transport_params(const unsigned char *params, |
743 | size_t params_len, | |
744 | void *arg) | |
745 | { | |
746 | QUIC_CHANNEL *ch = arg; | |
747 | PACKET pkt; | |
748 | uint64_t id, v; | |
749 | size_t len; | |
750 | const unsigned char *body; | |
751 | int got_orig_dcid = 0; | |
752 | int got_initial_scid = 0; | |
753 | int got_retry_scid = 0; | |
754 | int got_initial_max_data = 0; | |
755 | int got_initial_max_stream_data_bidi_local = 0; | |
756 | int got_initial_max_stream_data_bidi_remote = 0; | |
757 | int got_initial_max_stream_data_uni = 0; | |
758 | int got_initial_max_streams_bidi = 0; | |
759 | int got_initial_max_streams_uni = 0; | |
760 | int got_ack_delay_exp = 0; | |
761 | int got_max_ack_delay = 0; | |
762 | int got_max_udp_payload_size = 0; | |
763 | int got_max_idle_timeout = 0; | |
764 | int got_active_conn_id_limit = 0; | |
765 | QUIC_CONN_ID cid; | |
3c567a52 | 766 | const char *reason = "bad transport parameter"; |
f538b421 HL |
767 | |
768 | if (ch->got_remote_transport_params) | |
769 | goto malformed; | |
770 | ||
771 | if (!PACKET_buf_init(&pkt, params, params_len)) | |
772 | return 0; | |
773 | ||
774 | while (PACKET_remaining(&pkt) > 0) { | |
775 | if (!ossl_quic_wire_peek_transport_param(&pkt, &id)) | |
776 | goto malformed; | |
777 | ||
778 | switch (id) { | |
75b2920a | 779 | case QUIC_TPARAM_ORIG_DCID: |
3c567a52 HL |
780 | if (got_orig_dcid) { |
781 | reason = TP_REASON_DUP("ORIG_DCID"); | |
782 | goto malformed; | |
783 | } | |
784 | ||
785 | if (ch->is_server) { | |
786 | reason = TP_REASON_SERVER_ONLY("ORIG_DCID"); | |
75b2920a | 787 | goto malformed; |
3c567a52 | 788 | } |
75b2920a | 789 | |
3c567a52 HL |
790 | if (!ossl_quic_wire_decode_transport_param_cid(&pkt, NULL, &cid)) { |
791 | reason = TP_REASON_MALFORMED("ORIG_DCID"); | |
75b2920a | 792 | goto malformed; |
3c567a52 | 793 | } |
75b2920a HL |
794 | |
795 | /* Must match our initial DCID. */ | |
3c567a52 HL |
796 | if (!ossl_quic_conn_id_eq(&ch->init_dcid, &cid)) { |
797 | reason = TP_REASON_EXPECTED_VALUE("ORIG_DCID"); | |
75b2920a | 798 | goto malformed; |
3c567a52 | 799 | } |
75b2920a HL |
800 | |
801 | got_orig_dcid = 1; | |
802 | break; | |
803 | ||
804 | case QUIC_TPARAM_RETRY_SCID: | |
3c567a52 HL |
805 | if (ch->is_server) { |
806 | reason = TP_REASON_SERVER_ONLY("RETRY_SCID"); | |
807 | goto malformed; | |
808 | } | |
809 | ||
810 | if (got_retry_scid) { | |
811 | reason = TP_REASON_DUP("RETRY_SCID"); | |
75b2920a | 812 | goto malformed; |
3c567a52 HL |
813 | } |
814 | ||
815 | if (!ch->doing_retry) { | |
816 | reason = TP_REASON_NOT_RETRY("RETRY_SCID"); | |
817 | goto malformed; | |
818 | } | |
75b2920a | 819 | |
3c567a52 HL |
820 | if (!ossl_quic_wire_decode_transport_param_cid(&pkt, NULL, &cid)) { |
821 | reason = TP_REASON_MALFORMED("RETRY_SCID"); | |
75b2920a | 822 | goto malformed; |
3c567a52 | 823 | } |
75b2920a HL |
824 | |
825 | /* Must match Retry packet SCID. */ | |
3c567a52 HL |
826 | if (!ossl_quic_conn_id_eq(&ch->retry_scid, &cid)) { |
827 | reason = TP_REASON_EXPECTED_VALUE("RETRY_SCID"); | |
75b2920a | 828 | goto malformed; |
3c567a52 | 829 | } |
75b2920a HL |
830 | |
831 | got_retry_scid = 1; | |
832 | break; | |
833 | ||
834 | case QUIC_TPARAM_INITIAL_SCID: | |
3c567a52 | 835 | if (got_initial_scid) { |
75b2920a | 836 | /* must not appear more than once */ |
3c567a52 | 837 | reason = TP_REASON_DUP("INITIAL_SCID"); |
75b2920a | 838 | goto malformed; |
3c567a52 | 839 | } |
75b2920a | 840 | |
3c567a52 HL |
841 | if (!ossl_quic_wire_decode_transport_param_cid(&pkt, NULL, &cid)) { |
842 | reason = TP_REASON_MALFORMED("INITIAL_SCID"); | |
75b2920a | 843 | goto malformed; |
3c567a52 | 844 | } |
75b2920a HL |
845 | |
846 | /* Must match SCID of first Initial packet from server. */ | |
3c567a52 HL |
847 | if (!ossl_quic_conn_id_eq(&ch->init_scid, &cid)) { |
848 | reason = TP_REASON_EXPECTED_VALUE("INITIAL_SCID"); | |
75b2920a | 849 | goto malformed; |
3c567a52 | 850 | } |
75b2920a HL |
851 | |
852 | got_initial_scid = 1; | |
853 | break; | |
854 | ||
855 | case QUIC_TPARAM_INITIAL_MAX_DATA: | |
3c567a52 | 856 | if (got_initial_max_data) { |
75b2920a | 857 | /* must not appear more than once */ |
3c567a52 | 858 | reason = TP_REASON_DUP("INITIAL_MAX_DATA"); |
75b2920a | 859 | goto malformed; |
3c567a52 | 860 | } |
75b2920a | 861 | |
3c567a52 HL |
862 | if (!ossl_quic_wire_decode_transport_param_int(&pkt, &id, &v)) { |
863 | reason = TP_REASON_MALFORMED("INITIAL_MAX_DATA"); | |
75b2920a | 864 | goto malformed; |
3c567a52 | 865 | } |
75b2920a HL |
866 | |
867 | ossl_quic_txfc_bump_cwm(&ch->conn_txfc, v); | |
868 | got_initial_max_data = 1; | |
869 | break; | |
870 | ||
871 | case QUIC_TPARAM_INITIAL_MAX_STREAM_DATA_BIDI_LOCAL: | |
3c567a52 | 872 | if (got_initial_max_stream_data_bidi_local) { |
75b2920a | 873 | /* must not appear more than once */ |
3c567a52 | 874 | reason = TP_REASON_DUP("INITIAL_MAX_STREAM_DATA_BIDI_LOCAL"); |
75b2920a | 875 | goto malformed; |
3c567a52 | 876 | } |
75b2920a | 877 | |
3c567a52 HL |
878 | if (!ossl_quic_wire_decode_transport_param_int(&pkt, &id, &v)) { |
879 | reason = TP_REASON_MALFORMED("INITIAL_MAX_STREAM_DATA_BIDI_LOCAL"); | |
75b2920a | 880 | goto malformed; |
3c567a52 | 881 | } |
f538b421 HL |
882 | |
883 | /* | |
75b2920a HL |
884 | * This is correct; the BIDI_LOCAL TP governs streams created by |
885 | * the endpoint which sends the TP, i.e., our peer. | |
f538b421 | 886 | */ |
54562e89 | 887 | ch->rx_init_max_stream_data_bidi_remote = v; |
75b2920a HL |
888 | got_initial_max_stream_data_bidi_local = 1; |
889 | break; | |
890 | ||
891 | case QUIC_TPARAM_INITIAL_MAX_STREAM_DATA_BIDI_REMOTE: | |
3c567a52 | 892 | if (got_initial_max_stream_data_bidi_remote) { |
75b2920a | 893 | /* must not appear more than once */ |
3c567a52 | 894 | reason = TP_REASON_DUP("INITIAL_MAX_STREAM_DATA_BIDI_REMOTE"); |
75b2920a | 895 | goto malformed; |
3c567a52 | 896 | } |
75b2920a | 897 | |
3c567a52 HL |
898 | if (!ossl_quic_wire_decode_transport_param_int(&pkt, &id, &v)) { |
899 | reason = TP_REASON_MALFORMED("INITIAL_MAX_STREAM_DATA_BIDI_REMOTE"); | |
75b2920a | 900 | goto malformed; |
3c567a52 | 901 | } |
75b2920a HL |
902 | |
903 | /* | |
904 | * This is correct; the BIDI_REMOTE TP governs streams created | |
905 | * by the endpoint which receives the TP, i.e., us. | |
906 | */ | |
54562e89 | 907 | ch->rx_init_max_stream_data_bidi_local = v; |
75b2920a | 908 | |
26ad16ea HL |
909 | /* Apply to all existing streams. */ |
910 | ossl_quic_stream_map_visit(&ch->qsm, txfc_bump_cwm_bidi, &v); | |
75b2920a HL |
911 | got_initial_max_stream_data_bidi_remote = 1; |
912 | break; | |
913 | ||
914 | case QUIC_TPARAM_INITIAL_MAX_STREAM_DATA_UNI: | |
3c567a52 | 915 | if (got_initial_max_stream_data_uni) { |
75b2920a | 916 | /* must not appear more than once */ |
3c567a52 | 917 | reason = TP_REASON_DUP("INITIAL_MAX_STREAM_DATA_UNI"); |
75b2920a | 918 | goto malformed; |
3c567a52 | 919 | } |
75b2920a | 920 | |
3c567a52 HL |
921 | if (!ossl_quic_wire_decode_transport_param_int(&pkt, &id, &v)) { |
922 | reason = TP_REASON_MALFORMED("INITIAL_MAX_STREAM_DATA_UNI"); | |
75b2920a | 923 | goto malformed; |
3c567a52 | 924 | } |
75b2920a | 925 | |
54562e89 | 926 | ch->rx_init_max_stream_data_uni_remote = v; |
26ad16ea HL |
927 | |
928 | /* Apply to all existing streams. */ | |
929 | ossl_quic_stream_map_visit(&ch->qsm, txfc_bump_cwm_uni, &v); | |
75b2920a HL |
930 | got_initial_max_stream_data_uni = 1; |
931 | break; | |
932 | ||
933 | case QUIC_TPARAM_ACK_DELAY_EXP: | |
3c567a52 | 934 | if (got_ack_delay_exp) { |
75b2920a | 935 | /* must not appear more than once */ |
3c567a52 | 936 | reason = TP_REASON_DUP("ACK_DELAY_EXP"); |
75b2920a | 937 | goto malformed; |
3c567a52 | 938 | } |
75b2920a HL |
939 | |
940 | if (!ossl_quic_wire_decode_transport_param_int(&pkt, &id, &v) | |
3c567a52 HL |
941 | || v > QUIC_MAX_ACK_DELAY_EXP) { |
942 | reason = TP_REASON_MALFORMED("ACK_DELAY_EXP"); | |
75b2920a | 943 | goto malformed; |
3c567a52 | 944 | } |
75b2920a HL |
945 | |
946 | ch->rx_ack_delay_exp = (unsigned char)v; | |
947 | got_ack_delay_exp = 1; | |
948 | break; | |
949 | ||
950 | case QUIC_TPARAM_MAX_ACK_DELAY: | |
3c567a52 | 951 | if (got_max_ack_delay) { |
75b2920a | 952 | /* must not appear more than once */ |
3c567a52 | 953 | reason = TP_REASON_DUP("MAX_ACK_DELAY"); |
75b2920a | 954 | return 0; |
3c567a52 | 955 | } |
75b2920a HL |
956 | |
957 | if (!ossl_quic_wire_decode_transport_param_int(&pkt, &id, &v) | |
3c567a52 HL |
958 | || v >= (((uint64_t)1) << 14)) { |
959 | reason = TP_REASON_MALFORMED("MAX_ACK_DELAY"); | |
75b2920a | 960 | goto malformed; |
3c567a52 | 961 | } |
75b2920a HL |
962 | |
963 | ch->rx_max_ack_delay = v; | |
964 | got_max_ack_delay = 1; | |
965 | break; | |
966 | ||
967 | case QUIC_TPARAM_INITIAL_MAX_STREAMS_BIDI: | |
3c567a52 | 968 | if (got_initial_max_streams_bidi) { |
75b2920a | 969 | /* must not appear more than once */ |
3c567a52 | 970 | reason = TP_REASON_DUP("INITIAL_MAX_STREAMS_BIDI"); |
75b2920a | 971 | return 0; |
3c567a52 | 972 | } |
75b2920a HL |
973 | |
974 | if (!ossl_quic_wire_decode_transport_param_int(&pkt, &id, &v) | |
3c567a52 HL |
975 | || v > (((uint64_t)1) << 60)) { |
976 | reason = TP_REASON_MALFORMED("INITIAL_MAX_STREAMS_BIDI"); | |
75b2920a | 977 | goto malformed; |
3c567a52 | 978 | } |
75b2920a HL |
979 | |
980 | assert(ch->max_local_streams_bidi == 0); | |
981 | ch->max_local_streams_bidi = v; | |
982 | got_initial_max_streams_bidi = 1; | |
983 | break; | |
984 | ||
985 | case QUIC_TPARAM_INITIAL_MAX_STREAMS_UNI: | |
3c567a52 | 986 | if (got_initial_max_streams_uni) { |
75b2920a | 987 | /* must not appear more than once */ |
3c567a52 | 988 | reason = TP_REASON_DUP("INITIAL_MAX_STREAMS_UNI"); |
75b2920a | 989 | goto malformed; |
3c567a52 | 990 | } |
75b2920a HL |
991 | |
992 | if (!ossl_quic_wire_decode_transport_param_int(&pkt, &id, &v) | |
3c567a52 HL |
993 | || v > (((uint64_t)1) << 60)) { |
994 | reason = TP_REASON_MALFORMED("INITIAL_MAX_STREAMS_UNI"); | |
75b2920a | 995 | goto malformed; |
3c567a52 | 996 | } |
75b2920a HL |
997 | |
998 | assert(ch->max_local_streams_uni == 0); | |
999 | ch->max_local_streams_uni = v; | |
1000 | got_initial_max_streams_uni = 1; | |
1001 | break; | |
1002 | ||
1003 | case QUIC_TPARAM_MAX_IDLE_TIMEOUT: | |
3c567a52 | 1004 | if (got_max_idle_timeout) { |
75b2920a | 1005 | /* must not appear more than once */ |
3c567a52 | 1006 | reason = TP_REASON_DUP("MAX_IDLE_TIMEOUT"); |
75b2920a | 1007 | goto malformed; |
3c567a52 | 1008 | } |
75b2920a | 1009 | |
3c567a52 HL |
1010 | if (!ossl_quic_wire_decode_transport_param_int(&pkt, &id, &v)) { |
1011 | reason = TP_REASON_MALFORMED("MAX_IDLE_TIMEOUT"); | |
75b2920a | 1012 | goto malformed; |
3c567a52 | 1013 | } |
75b2920a | 1014 | |
4648eac5 | 1015 | if (v > 0 && v < ch->max_idle_timeout) |
75b2920a HL |
1016 | ch->max_idle_timeout = v; |
1017 | ||
1018 | ch_update_idle(ch); | |
1019 | got_max_idle_timeout = 1; | |
1020 | break; | |
f538b421 | 1021 | |
75b2920a | 1022 | case QUIC_TPARAM_MAX_UDP_PAYLOAD_SIZE: |
3c567a52 | 1023 | if (got_max_udp_payload_size) { |
75b2920a | 1024 | /* must not appear more than once */ |
3c567a52 | 1025 | reason = TP_REASON_DUP("MAX_UDP_PAYLOAD_SIZE"); |
75b2920a | 1026 | goto malformed; |
3c567a52 | 1027 | } |
f538b421 | 1028 | |
75b2920a | 1029 | if (!ossl_quic_wire_decode_transport_param_int(&pkt, &id, &v) |
3c567a52 HL |
1030 | || v < QUIC_MIN_INITIAL_DGRAM_LEN) { |
1031 | reason = TP_REASON_MALFORMED("MAX_UDP_PAYLOAD_SIZE"); | |
75b2920a | 1032 | goto malformed; |
3c567a52 | 1033 | } |
75b2920a HL |
1034 | |
1035 | ch->rx_max_udp_payload_size = v; | |
1036 | got_max_udp_payload_size = 1; | |
1037 | break; | |
1038 | ||
1039 | case QUIC_TPARAM_ACTIVE_CONN_ID_LIMIT: | |
3c567a52 | 1040 | if (got_active_conn_id_limit) { |
75b2920a | 1041 | /* must not appear more than once */ |
3c567a52 | 1042 | reason = TP_REASON_DUP("ACTIVE_CONN_ID_LIMIT"); |
75b2920a | 1043 | goto malformed; |
3c567a52 | 1044 | } |
75b2920a HL |
1045 | |
1046 | if (!ossl_quic_wire_decode_transport_param_int(&pkt, &id, &v) | |
3c567a52 HL |
1047 | || v < QUIC_MIN_ACTIVE_CONN_ID_LIMIT) { |
1048 | reason = TP_REASON_MALFORMED("ACTIVE_CONN_ID_LIMIT"); | |
75b2920a | 1049 | goto malformed; |
3c567a52 | 1050 | } |
75b2920a HL |
1051 | |
1052 | ch->rx_active_conn_id_limit = v; | |
1053 | got_active_conn_id_limit = 1; | |
1054 | break; | |
1055 | ||
3c567a52 HL |
1056 | case QUIC_TPARAM_STATELESS_RESET_TOKEN: |
1057 | /* TODO(QUIC): Handle stateless reset tokens. */ | |
1058 | /* | |
1059 | * We ignore these for now, but we must ensure a client doesn't | |
1060 | * send them. | |
1061 | */ | |
1062 | if (ch->is_server) { | |
1063 | reason = TP_REASON_SERVER_ONLY("STATELESS_RESET_TOKEN"); | |
1064 | goto malformed; | |
1065 | } | |
1066 | ||
1067 | body = ossl_quic_wire_decode_transport_param_bytes(&pkt, &id, &len); | |
1068 | if (body == NULL || len != QUIC_STATELESS_RESET_TOKEN_LEN) { | |
1069 | reason = TP_REASON_MALFORMED("STATELESS_RESET_TOKEN"); | |
1070 | goto malformed; | |
1071 | } | |
1072 | ||
1073 | break; | |
1074 | ||
1075 | case QUIC_TPARAM_PREFERRED_ADDR: | |
1076 | /* TODO(QUIC): Handle preferred address. */ | |
1077 | if (ch->is_server) { | |
1078 | reason = TP_REASON_SERVER_ONLY("PREFERRED_ADDR"); | |
1079 | goto malformed; | |
1080 | } | |
1081 | ||
1082 | body = ossl_quic_wire_decode_transport_param_bytes(&pkt, &id, &len); | |
1083 | if (body == NULL) { | |
1084 | reason = TP_REASON_MALFORMED("PREFERRED_ADDR"); | |
1085 | goto malformed; | |
1086 | } | |
1087 | ||
1088 | break; | |
75b2920a HL |
1089 | |
1090 | case QUIC_TPARAM_DISABLE_ACTIVE_MIGRATION: | |
1091 | /* We do not currently handle migration, so nothing to do. */ | |
1092 | default: | |
1093 | /* Skip over and ignore. */ | |
1094 | body = ossl_quic_wire_decode_transport_param_bytes(&pkt, &id, | |
1095 | &len); | |
1096 | if (body == NULL) | |
1097 | goto malformed; | |
1098 | ||
1099 | break; | |
f538b421 HL |
1100 | } |
1101 | } | |
1102 | ||
3c567a52 HL |
1103 | if (!got_initial_scid) { |
1104 | reason = TP_REASON_REQUIRED("INITIAL_SCID"); | |
f538b421 | 1105 | goto malformed; |
3c567a52 HL |
1106 | } |
1107 | ||
1108 | if (!ch->is_server) { | |
1109 | if (!got_orig_dcid) { | |
1110 | reason = TP_REASON_REQUIRED("ORIG_DCID"); | |
1111 | goto malformed; | |
1112 | } | |
1113 | ||
1114 | if (ch->doing_retry && !got_retry_scid) { | |
1115 | reason = TP_REASON_REQUIRED("RETRY_SCID"); | |
1116 | goto malformed; | |
1117 | } | |
1118 | } | |
f538b421 HL |
1119 | |
1120 | ch->got_remote_transport_params = 1; | |
1121 | ||
1122 | if (got_initial_max_data || got_initial_max_stream_data_bidi_remote | |
1123 | || got_initial_max_streams_bidi || got_initial_max_streams_uni) | |
26ad16ea HL |
1124 | /* |
1125 | * If FC credit was bumped, we may now be able to send. Update all | |
1126 | * streams. | |
1127 | */ | |
1128 | ossl_quic_stream_map_visit(&ch->qsm, do_update, ch); | |
f538b421 HL |
1129 | |
1130 | /* If we are a server, we now generate our own transport parameters. */ | |
1131 | if (ch->is_server && !ch_generate_transport_params(ch)) { | |
1132 | ossl_quic_channel_raise_protocol_error(ch, QUIC_ERR_INTERNAL_ERROR, 0, | |
1133 | "internal error"); | |
1134 | return 0; | |
1135 | } | |
1136 | ||
1137 | return 1; | |
1138 | ||
1139 | malformed: | |
1140 | ossl_quic_channel_raise_protocol_error(ch, QUIC_ERR_TRANSPORT_PARAMETER_ERROR, | |
3c567a52 | 1141 | 0, reason); |
f538b421 HL |
1142 | return 0; |
1143 | } | |
1144 | ||
1145 | /* | |
1146 | * Called when we want to generate transport parameters. This is called | |
1147 | * immediately at instantiation time for a client and after we receive the | |
1148 | * client's transport parameters for a server. | |
1149 | */ | |
1150 | static int ch_generate_transport_params(QUIC_CHANNEL *ch) | |
1151 | { | |
1152 | int ok = 0; | |
1153 | BUF_MEM *buf_mem = NULL; | |
1154 | WPACKET wpkt; | |
1155 | int wpkt_valid = 0; | |
1156 | size_t buf_len = 0; | |
1157 | ||
1158 | if (ch->local_transport_params != NULL) | |
1159 | goto err; | |
1160 | ||
1161 | if ((buf_mem = BUF_MEM_new()) == NULL) | |
1162 | goto err; | |
1163 | ||
1164 | if (!WPACKET_init(&wpkt, buf_mem)) | |
1165 | goto err; | |
1166 | ||
1167 | wpkt_valid = 1; | |
1168 | ||
1169 | if (ossl_quic_wire_encode_transport_param_bytes(&wpkt, QUIC_TPARAM_DISABLE_ACTIVE_MIGRATION, | |
1170 | NULL, 0) == NULL) | |
1171 | goto err; | |
1172 | ||
3c567a52 HL |
1173 | if (ch->is_server) { |
1174 | if (!ossl_quic_wire_encode_transport_param_cid(&wpkt, QUIC_TPARAM_ORIG_DCID, | |
1175 | &ch->init_dcid)) | |
1176 | goto err; | |
1177 | ||
1178 | if (!ossl_quic_wire_encode_transport_param_cid(&wpkt, QUIC_TPARAM_INITIAL_SCID, | |
1179 | &ch->cur_local_dcid)) | |
1180 | goto err; | |
1181 | } else { | |
1182 | /* Client always uses an empty SCID. */ | |
1183 | if (ossl_quic_wire_encode_transport_param_bytes(&wpkt, QUIC_TPARAM_INITIAL_SCID, | |
1184 | NULL, 0) == NULL) | |
1185 | goto err; | |
1186 | } | |
f538b421 HL |
1187 | |
1188 | if (!ossl_quic_wire_encode_transport_param_int(&wpkt, QUIC_TPARAM_MAX_IDLE_TIMEOUT, | |
1189 | ch->max_idle_timeout)) | |
1190 | goto err; | |
1191 | ||
1192 | if (!ossl_quic_wire_encode_transport_param_int(&wpkt, QUIC_TPARAM_MAX_UDP_PAYLOAD_SIZE, | |
1193 | QUIC_MIN_INITIAL_DGRAM_LEN)) | |
1194 | goto err; | |
1195 | ||
1196 | if (!ossl_quic_wire_encode_transport_param_int(&wpkt, QUIC_TPARAM_ACTIVE_CONN_ID_LIMIT, | |
1197 | 4)) | |
1198 | goto err; | |
1199 | ||
1200 | if (!ossl_quic_wire_encode_transport_param_int(&wpkt, QUIC_TPARAM_INITIAL_MAX_DATA, | |
1201 | ossl_quic_rxfc_get_cwm(&ch->conn_rxfc))) | |
1202 | goto err; | |
1203 | ||
0815b725 | 1204 | /* Send the default CWM for a new RXFC. */ |
f538b421 | 1205 | if (!ossl_quic_wire_encode_transport_param_int(&wpkt, QUIC_TPARAM_INITIAL_MAX_STREAM_DATA_BIDI_LOCAL, |
0815b725 | 1206 | ch->tx_init_max_stream_data_bidi_local)) |
f538b421 HL |
1207 | goto err; |
1208 | ||
1209 | if (!ossl_quic_wire_encode_transport_param_int(&wpkt, QUIC_TPARAM_INITIAL_MAX_STREAM_DATA_BIDI_REMOTE, | |
0815b725 | 1210 | ch->tx_init_max_stream_data_bidi_remote)) |
f538b421 HL |
1211 | goto err; |
1212 | ||
1213 | if (!ossl_quic_wire_encode_transport_param_int(&wpkt, QUIC_TPARAM_INITIAL_MAX_STREAM_DATA_UNI, | |
0815b725 | 1214 | ch->tx_init_max_stream_data_uni)) |
f538b421 HL |
1215 | goto err; |
1216 | ||
0815b725 | 1217 | /* TODO(QUIC): MAX_STREAMS modelling */ |
f538b421 | 1218 | if (!ossl_quic_wire_encode_transport_param_int(&wpkt, QUIC_TPARAM_INITIAL_MAX_STREAMS_BIDI, |
0815b725 | 1219 | ch->is_server ? 100 : 100)) |
f538b421 HL |
1220 | goto err; |
1221 | ||
1222 | if (!ossl_quic_wire_encode_transport_param_int(&wpkt, QUIC_TPARAM_INITIAL_MAX_STREAMS_UNI, | |
0815b725 | 1223 | 100)) |
f538b421 HL |
1224 | goto err; |
1225 | ||
1226 | if (!WPACKET_get_total_written(&wpkt, &buf_len)) | |
1227 | goto err; | |
1228 | ||
1229 | ch->local_transport_params = (unsigned char *)buf_mem->data; | |
1230 | buf_mem->data = NULL; | |
1231 | ||
1232 | if (!WPACKET_finish(&wpkt)) | |
1233 | goto err; | |
1234 | ||
1235 | wpkt_valid = 0; | |
1236 | ||
2723d705 | 1237 | if (!ossl_quic_tls_set_transport_params(ch->qtls, ch->local_transport_params, |
f538b421 HL |
1238 | buf_len)) |
1239 | goto err; | |
1240 | ||
1241 | ok = 1; | |
1242 | err: | |
1243 | if (wpkt_valid) | |
1244 | WPACKET_cleanup(&wpkt); | |
1245 | BUF_MEM_free(buf_mem); | |
1246 | return ok; | |
1247 | } | |
1248 | ||
1249 | /* | |
1250 | * QUIC Channel: Ticker-Mutator | |
1251 | * ============================ | |
1252 | */ | |
1253 | ||
1254 | /* | |
1255 | * The central ticker function called by the reactor. This does everything, or | |
1256 | * at least everything network I/O related. Best effort - not allowed to fail | |
1257 | * "loudly". | |
1258 | */ | |
ccd31037 | 1259 | static void ch_tick(QUIC_TICK_RESULT *res, void *arg, uint32_t flags) |
f538b421 HL |
1260 | { |
1261 | OSSL_TIME now, deadline; | |
1262 | QUIC_CHANNEL *ch = arg; | |
9cf091a3 | 1263 | int channel_only = (flags & QUIC_REACTOR_TICK_FLAG_CHANNEL_ONLY) != 0; |
f538b421 HL |
1264 | |
1265 | /* | |
1266 | * When we tick the QUIC connection, we do everything we need to do | |
1267 | * periodically. In order, we: | |
1268 | * | |
1269 | * - handle any incoming data from the network; | |
1270 | * - handle any timer events which are due to fire (ACKM, etc.) | |
1271 | * - write any data to the network due to be sent, to the extent | |
1272 | * possible; | |
1273 | * - determine the time at which we should next be ticked. | |
1274 | */ | |
1275 | ||
1276 | /* If we are in the TERMINATED state, there is nothing to do. */ | |
c12e1113 | 1277 | if (ossl_quic_channel_is_terminated(ch)) { |
b639475a HL |
1278 | res->net_read_desired = 0; |
1279 | res->net_write_desired = 0; | |
1280 | res->tick_deadline = ossl_time_infinite(); | |
f538b421 HL |
1281 | return; |
1282 | } | |
1283 | ||
1284 | /* | |
1285 | * If we are in the TERMINATING state, check if the terminating timer has | |
1286 | * expired. | |
1287 | */ | |
c12e1113 | 1288 | if (ossl_quic_channel_is_terminating(ch)) { |
b212d554 | 1289 | now = get_time(ch); |
f538b421 HL |
1290 | |
1291 | if (ossl_time_compare(now, ch->terminate_deadline) >= 0) { | |
1292 | ch_on_terminating_timeout(ch); | |
b639475a HL |
1293 | res->net_read_desired = 0; |
1294 | res->net_write_desired = 0; | |
1295 | res->tick_deadline = ossl_time_infinite(); | |
f538b421 HL |
1296 | return; /* abort normal processing, nothing to do */ |
1297 | } | |
1298 | } | |
1299 | ||
3bf4dc8c HL |
1300 | /* Handle any incoming data from network. */ |
1301 | ch_rx_pre(ch); | |
1302 | ||
4e64437a | 1303 | do { |
3bf4dc8c | 1304 | /* Process queued incoming packets. */ |
4e64437a | 1305 | ch_rx(ch); |
f538b421 | 1306 | |
4e64437a HL |
1307 | /* |
1308 | * Allow the handshake layer to check for any new incoming data and generate | |
1309 | * new outgoing data. | |
1310 | */ | |
92282a17 | 1311 | ch->have_new_rx_secret = 0; |
ccd31037 HL |
1312 | if (!channel_only) |
1313 | ossl_quic_tls_tick(ch->qtls); | |
4e64437a HL |
1314 | |
1315 | /* | |
1316 | * If the handshake layer gave us a new secret, we need to do RX again | |
1317 | * because packets that were not previously processable and were | |
1318 | * deferred might now be processable. | |
9f0ade7c HL |
1319 | * |
1320 | * TODO(QUIC): Consider handling this in the yield_secret callback. | |
4e64437a | 1321 | */ |
92282a17 | 1322 | } while (ch->have_new_rx_secret); |
f538b421 HL |
1323 | |
1324 | /* | |
1325 | * Handle any timer events which are due to fire; namely, the loss detection | |
1326 | * deadline and the idle timeout. | |
1327 | * | |
1328 | * ACKM ACK generation deadline is polled by TXP, so we don't need to handle | |
1329 | * it here. | |
1330 | */ | |
b212d554 | 1331 | now = get_time(ch); |
f538b421 HL |
1332 | if (ossl_time_compare(now, ch->idle_deadline) >= 0) { |
1333 | /* | |
1334 | * Idle timeout differs from normal protocol violation because we do not | |
1335 | * send a CONN_CLOSE frame; go straight to TERMINATED. | |
1336 | */ | |
1337 | ch_on_idle_timeout(ch); | |
b639475a HL |
1338 | res->net_read_desired = 0; |
1339 | res->net_write_desired = 0; | |
1340 | res->tick_deadline = ossl_time_infinite(); | |
f538b421 HL |
1341 | return; |
1342 | } | |
1343 | ||
1344 | deadline = ossl_ackm_get_loss_detection_deadline(ch->ackm); | |
1345 | if (!ossl_time_is_zero(deadline) && ossl_time_compare(now, deadline) >= 0) | |
1346 | ossl_ackm_on_timeout(ch->ackm); | |
1347 | ||
3b1ab5a3 HL |
1348 | /* If a ping is due, inform TXP. */ |
1349 | if (ossl_time_compare(now, ch->ping_deadline) >= 0) { | |
1350 | int pn_space = ossl_quic_enc_level_to_pn_space(ch->tx_enc_level); | |
1351 | ||
1352 | ossl_quic_tx_packetiser_schedule_ack_eliciting(ch->txp, pn_space); | |
1353 | } | |
1354 | ||
f538b421 HL |
1355 | /* Write any data to the network due to be sent. */ |
1356 | ch_tx(ch); | |
1357 | ||
1358 | /* Determine the time at which we should next be ticked. */ | |
1359 | res->tick_deadline = ch_determine_next_tick_deadline(ch); | |
1360 | ||
df15e990 HL |
1361 | /* |
1362 | * Always process network input unless we are now terminated. | |
1363 | * Although we had not terminated at the beginning of this tick, network | |
1364 | * errors in ch_rx_pre() or ch_tx() may have caused us to transition to the | |
1365 | * Terminated state. | |
1366 | */ | |
c12e1113 | 1367 | res->net_read_desired = !ossl_quic_channel_is_terminated(ch); |
f538b421 HL |
1368 | |
1369 | /* We want to write to the network if we have any in our queue. */ | |
b639475a | 1370 | res->net_write_desired |
c12e1113 | 1371 | = (!ossl_quic_channel_is_terminated(ch) |
df15e990 | 1372 | && ossl_qtx_get_queue_len_datagrams(ch->qtx) > 0); |
f538b421 HL |
1373 | } |
1374 | ||
3bf4dc8c HL |
1375 | /* Process incoming datagrams, if any. */ |
1376 | static void ch_rx_pre(QUIC_CHANNEL *ch) | |
1377 | { | |
df15e990 HL |
1378 | int ret; |
1379 | ||
b1b06da2 | 1380 | if (!ch->is_server && !ch->have_sent_any_pkt) |
3bf4dc8c HL |
1381 | return; |
1382 | ||
1383 | /* | |
1384 | * Get DEMUX to BIO_recvmmsg from the network and queue incoming datagrams | |
1385 | * to the appropriate QRX instance. | |
1386 | */ | |
df15e990 HL |
1387 | ret = ossl_quic_demux_pump(ch->demux); |
1388 | if (ret == QUIC_DEMUX_PUMP_RES_PERMANENT_FAIL) | |
1389 | /* | |
1390 | * We don't care about transient failure, but permanent failure means we | |
1391 | * should tear down the connection as though a protocol violation | |
1392 | * occurred. Skip straight to the Terminating state as there is no point | |
1393 | * trying to send CONNECTION_CLOSE frames if the network BIO is not | |
1394 | * operating correctly. | |
1395 | */ | |
1396 | ch_raise_net_error(ch); | |
3bf4dc8c HL |
1397 | } |
1398 | ||
1399 | /* Process queued incoming packets and handle frames, if any. */ | |
f538b421 HL |
1400 | static int ch_rx(QUIC_CHANNEL *ch) |
1401 | { | |
1402 | int handled_any = 0; | |
1403 | ||
b1b06da2 | 1404 | if (!ch->is_server && !ch->have_sent_any_pkt) |
f538b421 HL |
1405 | /* |
1406 | * We have not sent anything yet, therefore there is no need to check | |
75b2920a | 1407 | * for incoming data. |
f538b421 HL |
1408 | */ |
1409 | return 1; | |
1410 | ||
f538b421 HL |
1411 | for (;;) { |
1412 | assert(ch->qrx_pkt == NULL); | |
1413 | ||
1414 | if (!ossl_qrx_read_pkt(ch->qrx, &ch->qrx_pkt)) | |
1415 | break; | |
1416 | ||
1417 | if (!handled_any) | |
1418 | ch_update_idle(ch); | |
1419 | ||
1420 | ch_rx_handle_packet(ch); /* best effort */ | |
1421 | ||
1422 | /* | |
1423 | * Regardless of the outcome of frame handling, unref the packet. | |
1424 | * This will free the packet unless something added another | |
1425 | * reference to it during frame processing. | |
1426 | */ | |
1427 | ossl_qrx_pkt_release(ch->qrx_pkt); | |
1428 | ch->qrx_pkt = NULL; | |
1429 | ||
3b1ab5a3 | 1430 | ch->have_sent_ack_eliciting_since_rx = 0; |
f538b421 HL |
1431 | handled_any = 1; |
1432 | } | |
1433 | ||
1434 | /* | |
1435 | * When in TERMINATING - CLOSING, generate a CONN_CLOSE frame whenever we | |
1436 | * process one or more incoming packets. | |
1437 | */ | |
1438 | if (handled_any && ch->state == QUIC_CHANNEL_STATE_TERMINATING_CLOSING) | |
1439 | ch->conn_close_queued = 1; | |
1440 | ||
1441 | return 1; | |
1442 | } | |
1443 | ||
1444 | /* Handles the packet currently in ch->qrx_pkt->hdr. */ | |
1445 | static void ch_rx_handle_packet(QUIC_CHANNEL *ch) | |
1446 | { | |
1447 | uint32_t enc_level; | |
1448 | ||
1449 | assert(ch->qrx_pkt != NULL); | |
1450 | ||
1451 | if (ossl_quic_pkt_type_is_encrypted(ch->qrx_pkt->hdr->type)) { | |
1452 | if (!ch->have_received_enc_pkt) { | |
1453 | ch->init_scid = ch->qrx_pkt->hdr->src_conn_id; | |
1454 | ch->have_received_enc_pkt = 1; | |
1455 | ||
1456 | /* | |
1457 | * We change to using the SCID in the first Initial packet as the | |
1458 | * DCID. | |
1459 | */ | |
1460 | ossl_quic_tx_packetiser_set_cur_dcid(ch->txp, &ch->init_scid); | |
1461 | } | |
1462 | ||
1463 | enc_level = ossl_quic_pkt_type_to_enc_level(ch->qrx_pkt->hdr->type); | |
1464 | if ((ch->el_discarded & (1U << enc_level)) != 0) | |
1465 | /* Do not process packets from ELs we have already discarded. */ | |
1466 | return; | |
1467 | } | |
1468 | ||
1469 | /* Handle incoming packet. */ | |
1470 | switch (ch->qrx_pkt->hdr->type) { | |
75b2920a | 1471 | case QUIC_PKT_TYPE_RETRY: |
b1b06da2 | 1472 | if (ch->doing_retry || ch->is_server) |
75b2920a HL |
1473 | /* |
1474 | * It is not allowed to ask a client to do a retry more than | |
b1b06da2 | 1475 | * once. Clients may not send retries. |
75b2920a HL |
1476 | */ |
1477 | return; | |
f538b421 | 1478 | |
75b2920a HL |
1479 | if (ch->qrx_pkt->hdr->len <= QUIC_RETRY_INTEGRITY_TAG_LEN) |
1480 | /* Packets with zero-length Retry Tokens are invalid. */ | |
1481 | return; | |
f538b421 | 1482 | |
75b2920a HL |
1483 | /* |
1484 | * TODO(QUIC): Theoretically this should probably be in the QRX. | |
1485 | * However because validation is dependent on context (namely the | |
1486 | * client's initial DCID) we can't do this cleanly. In the future we | |
1487 | * should probably add a callback to the QRX to let it call us (via | |
1488 | * the DEMUX) and ask us about the correct original DCID, rather | |
1489 | * than allow the QRX to emit a potentially malformed packet to the | |
1490 | * upper layers. However, special casing this will do for now. | |
1491 | */ | |
1492 | if (!ossl_quic_validate_retry_integrity_tag(ch->libctx, | |
1493 | ch->propq, | |
1494 | ch->qrx_pkt->hdr, | |
1495 | &ch->init_dcid)) | |
1496 | /* Malformed retry packet, ignore. */ | |
1497 | return; | |
f538b421 | 1498 | |
75b2920a HL |
1499 | ch_retry(ch, ch->qrx_pkt->hdr->data, |
1500 | ch->qrx_pkt->hdr->len - QUIC_RETRY_INTEGRITY_TAG_LEN, | |
1501 | &ch->qrx_pkt->hdr->src_conn_id); | |
1502 | break; | |
f538b421 | 1503 | |
75b2920a | 1504 | case QUIC_PKT_TYPE_0RTT: |
b1b06da2 HL |
1505 | if (!ch->is_server) |
1506 | /* Clients should never receive 0-RTT packets. */ | |
1507 | return; | |
1508 | ||
1509 | /* | |
1510 | * TODO(QUIC): Implement 0-RTT on the server side. We currently do | |
1511 | * not need to implement this as a client can only do 0-RTT if we | |
1512 | * have given it permission to in a previous session. | |
1513 | */ | |
75b2920a HL |
1514 | break; |
1515 | ||
b1b06da2 HL |
1516 | case QUIC_PKT_TYPE_INITIAL: |
1517 | case QUIC_PKT_TYPE_HANDSHAKE: | |
1518 | case QUIC_PKT_TYPE_1RTT: | |
75b2920a HL |
1519 | if (ch->qrx_pkt->hdr->type == QUIC_PKT_TYPE_HANDSHAKE) |
1520 | /* | |
1521 | * We automatically drop INITIAL EL keys when first successfully | |
1522 | * decrypting a HANDSHAKE packet, as per the RFC. | |
1523 | */ | |
1524 | ch_discard_el(ch, QUIC_ENC_LEVEL_INITIAL); | |
1525 | ||
1526 | /* This packet contains frames, pass to the RXDP. */ | |
1527 | ossl_quic_handle_frames(ch, ch->qrx_pkt); /* best effort */ | |
1528 | break; | |
b1b06da2 HL |
1529 | |
1530 | default: | |
1531 | assert(0); | |
1532 | break; | |
1533 | } | |
1534 | } | |
1535 | ||
1536 | /* | |
1537 | * This is called by the demux when we get a packet not destined for any known | |
1538 | * DCID. | |
1539 | */ | |
1540 | static void ch_default_packet_handler(QUIC_URXE *e, void *arg) | |
1541 | { | |
1542 | QUIC_CHANNEL *ch = arg; | |
1543 | PACKET pkt; | |
1544 | QUIC_PKT_HDR hdr; | |
1545 | ||
1546 | if (!ossl_assert(ch->is_server)) | |
1547 | goto undesirable; | |
1548 | ||
1549 | /* | |
1550 | * We only support one connection to our server currently, so if we already | |
1551 | * started one, ignore any new connection attempts. | |
1552 | */ | |
1553 | if (ch->state != QUIC_CHANNEL_STATE_IDLE) | |
1554 | goto undesirable; | |
1555 | ||
1556 | /* | |
1557 | * We have got a packet for an unknown DCID. This might be an attempt to | |
1558 | * open a new connection. | |
1559 | */ | |
1560 | if (e->data_len < QUIC_MIN_INITIAL_DGRAM_LEN) | |
1561 | goto undesirable; | |
1562 | ||
1563 | if (!PACKET_buf_init(&pkt, ossl_quic_urxe_data(e), e->data_len)) | |
091f532e | 1564 | goto err; |
b1b06da2 HL |
1565 | |
1566 | /* | |
1567 | * We set short_conn_id_len to SIZE_MAX here which will cause the decode | |
1568 | * operation to fail if we get a 1-RTT packet. This is fine since we only | |
1569 | * care about Initial packets. | |
1570 | */ | |
1571 | if (!ossl_quic_wire_decode_pkt_hdr(&pkt, SIZE_MAX, 1, &hdr, NULL)) | |
1572 | goto undesirable; | |
1573 | ||
1574 | switch (hdr.version) { | |
1575 | case QUIC_VERSION_1: | |
1576 | break; | |
1577 | ||
1578 | case QUIC_VERSION_NONE: | |
1579 | default: | |
1580 | /* Unknown version or proactive version negotiation request, bail. */ | |
1581 | /* TODO(QUIC): Handle version negotiation on server side */ | |
1582 | goto undesirable; | |
f538b421 | 1583 | } |
b1b06da2 HL |
1584 | |
1585 | /* | |
1586 | * We only care about Initial packets which might be trying to establish a | |
1587 | * connection. | |
1588 | */ | |
1589 | if (hdr.type != QUIC_PKT_TYPE_INITIAL) | |
1590 | goto undesirable; | |
1591 | ||
1592 | /* | |
1593 | * Assume this is a valid attempt to initiate a connection. | |
1594 | * | |
1595 | * We do not register the DCID in the initial packet we received and that | |
1596 | * DCID is not actually used again, thus after provisioning the correct | |
1597 | * Initial keys derived from it (which is done in the call below) we pass | |
1598 | * the received packet directly to the QRX so that it can process it as a | |
1599 | * one-time thing, instead of going through the usual DEMUX DCID-based | |
1600 | * routing. | |
1601 | */ | |
1602 | if (!ch_server_on_new_conn(ch, &e->peer, | |
1603 | &hdr.src_conn_id, | |
1604 | &hdr.dst_conn_id)) | |
091f532e | 1605 | goto err; |
b1b06da2 HL |
1606 | |
1607 | ossl_qrx_inject_urxe(ch->qrx, e); | |
1608 | return; | |
1609 | ||
091f532e HL |
1610 | err: |
1611 | ossl_quic_channel_raise_protocol_error(ch, QUIC_ERR_INTERNAL_ERROR, 0, | |
1612 | "internal error"); | |
b1b06da2 HL |
1613 | undesirable: |
1614 | ossl_quic_demux_release_urxe(ch->demux, e); | |
f538b421 HL |
1615 | } |
1616 | ||
1617 | /* Try to generate packets and if possible, flush them to the network. */ | |
1618 | static int ch_tx(QUIC_CHANNEL *ch) | |
1619 | { | |
3b1ab5a3 HL |
1620 | int sent_ack_eliciting = 0; |
1621 | ||
f538b421 HL |
1622 | if (ch->state == QUIC_CHANNEL_STATE_TERMINATING_CLOSING) { |
1623 | /* | |
1624 | * While closing, only send CONN_CLOSE if we've received more traffic | |
1625 | * from the peer. Once we tell the TXP to generate CONN_CLOSE, all | |
1626 | * future calls to it generate CONN_CLOSE frames, so otherwise we would | |
1627 | * just constantly generate CONN_CLOSE frames. | |
1628 | */ | |
1629 | if (!ch->conn_close_queued) | |
1630 | return 0; | |
1631 | ||
1632 | ch->conn_close_queued = 0; | |
1633 | } | |
1634 | ||
1635 | /* | |
1636 | * Send a packet, if we need to. Best effort. The TXP consults the CC and | |
1637 | * applies any limitations imposed by it, so we don't need to do it here. | |
1638 | * | |
1639 | * Best effort. In particular if TXP fails for some reason we should still | |
1640 | * flush any queued packets which we already generated. | |
1641 | */ | |
df15e990 | 1642 | switch (ossl_quic_tx_packetiser_generate(ch->txp, |
3b1ab5a3 HL |
1643 | TX_PACKETISER_ARCHETYPE_NORMAL, |
1644 | &sent_ack_eliciting)) { | |
df15e990 HL |
1645 | case TX_PACKETISER_RES_SENT_PKT: |
1646 | ch->have_sent_any_pkt = 1; /* Packet was sent */ | |
3b1ab5a3 HL |
1647 | |
1648 | /* | |
1649 | * RFC 9000 s. 10.1. 'An endpoint also restarts its idle timer when | |
1650 | * sending an ack-eliciting packet if no other ack-eliciting packets | |
c4208a6a | 1651 | * have been sent since last receiving and processing a packet.' |
3b1ab5a3 HL |
1652 | */ |
1653 | if (sent_ack_eliciting && !ch->have_sent_ack_eliciting_since_rx) { | |
1654 | ch_update_idle(ch); | |
1655 | ch->have_sent_ack_eliciting_since_rx = 1; | |
1656 | } | |
1657 | ||
1658 | ch_update_ping_deadline(ch); | |
df15e990 | 1659 | break; |
3b1ab5a3 | 1660 | |
df15e990 HL |
1661 | case TX_PACKETISER_RES_NO_PKT: |
1662 | break; /* No packet was sent */ | |
1663 | default: | |
1664 | ossl_quic_channel_raise_protocol_error(ch, QUIC_ERR_INTERNAL_ERROR, 0, | |
1665 | "internal error"); | |
1666 | break; /* Internal failure (e.g. allocation, assertion) */ | |
1667 | } | |
1668 | ||
1669 | /* Flush packets to network. */ | |
1670 | switch (ossl_qtx_flush_net(ch->qtx)) { | |
1671 | case QTX_FLUSH_NET_RES_OK: | |
1672 | case QTX_FLUSH_NET_RES_TRANSIENT_FAIL: | |
1673 | /* Best effort, done for now. */ | |
1674 | break; | |
1675 | ||
1676 | case QTX_FLUSH_NET_RES_PERMANENT_FAIL: | |
1677 | default: | |
1678 | /* Permanent underlying network BIO, start terminating. */ | |
1679 | ch_raise_net_error(ch); | |
1680 | break; | |
1681 | } | |
f538b421 | 1682 | |
f538b421 HL |
1683 | return 1; |
1684 | } | |
1685 | ||
1686 | /* Determine next tick deadline. */ | |
1687 | static OSSL_TIME ch_determine_next_tick_deadline(QUIC_CHANNEL *ch) | |
1688 | { | |
1689 | OSSL_TIME deadline; | |
1690 | uint32_t pn_space; | |
1691 | ||
c12e1113 | 1692 | if (ossl_quic_channel_is_terminated(ch)) |
df15e990 HL |
1693 | return ossl_time_infinite(); |
1694 | ||
f538b421 HL |
1695 | deadline = ossl_ackm_get_loss_detection_deadline(ch->ackm); |
1696 | if (ossl_time_is_zero(deadline)) | |
1697 | deadline = ossl_time_infinite(); | |
1698 | ||
1699 | for (pn_space = QUIC_PN_SPACE_INITIAL; pn_space < QUIC_PN_SPACE_NUM; ++pn_space) | |
1700 | deadline = ossl_time_min(deadline, | |
1701 | ossl_ackm_get_ack_deadline(ch->ackm, pn_space)); | |
1702 | ||
1703 | /* When will CC let us send more? */ | |
1704 | if (ossl_quic_tx_packetiser_has_pending(ch->txp, TX_PACKETISER_ARCHETYPE_NORMAL, | |
1705 | TX_PACKETISER_BYPASS_CC)) | |
1706 | deadline = ossl_time_min(deadline, | |
90699176 | 1707 | ch->cc_method->get_wakeup_deadline(ch->cc_data)); |
f538b421 HL |
1708 | |
1709 | /* Is the terminating timer armed? */ | |
c12e1113 | 1710 | if (ossl_quic_channel_is_terminating(ch)) |
f538b421 HL |
1711 | deadline = ossl_time_min(deadline, |
1712 | ch->terminate_deadline); | |
1713 | else if (!ossl_time_is_infinite(ch->idle_deadline)) | |
1714 | deadline = ossl_time_min(deadline, | |
1715 | ch->idle_deadline); | |
1716 | ||
3b1ab5a3 HL |
1717 | /* |
1718 | * When do we need to send an ACK-eliciting packet to reset the idle | |
1719 | * deadline timer for the peer? | |
1720 | */ | |
1721 | if (!ossl_time_is_infinite(ch->ping_deadline)) | |
1722 | deadline = ossl_time_min(deadline, | |
1723 | ch->ping_deadline); | |
1724 | ||
f538b421 HL |
1725 | return deadline; |
1726 | } | |
1727 | ||
1728 | /* | |
1729 | * QUIC Channel: Network BIO Configuration | |
1730 | * ======================================= | |
1731 | */ | |
1732 | ||
1733 | /* Determines whether we can support a given poll descriptor. */ | |
1734 | static int validate_poll_descriptor(const BIO_POLL_DESCRIPTOR *d) | |
1735 | { | |
1736 | if (d->type == BIO_POLL_DESCRIPTOR_TYPE_SOCK_FD && d->value.fd < 0) | |
1737 | return 0; | |
1738 | ||
1739 | return 1; | |
1740 | } | |
1741 | ||
1742 | BIO *ossl_quic_channel_get_net_rbio(QUIC_CHANNEL *ch) | |
1743 | { | |
1744 | return ch->net_rbio; | |
1745 | } | |
1746 | ||
1747 | BIO *ossl_quic_channel_get_net_wbio(QUIC_CHANNEL *ch) | |
1748 | { | |
1749 | return ch->net_wbio; | |
1750 | } | |
1751 | ||
d1ac77b1 HL |
1752 | /* |
1753 | * QUIC_CHANNEL does not ref any BIO it is provided with, nor is any ref | |
1754 | * transferred to it. The caller (i.e., QUIC_CONNECTION) is responsible for | |
1755 | * ensuring the BIO lasts until the channel is freed or the BIO is switched out | |
1756 | * for another BIO by a subsequent successful call to this function. | |
1757 | */ | |
1758 | int ossl_quic_channel_set_net_rbio(QUIC_CHANNEL *ch, BIO *net_rbio) | |
f538b421 HL |
1759 | { |
1760 | BIO_POLL_DESCRIPTOR d = {0}; | |
1761 | ||
1762 | if (ch->net_rbio == net_rbio) | |
1763 | return 1; | |
1764 | ||
1765 | if (net_rbio != NULL) { | |
1766 | if (!BIO_get_rpoll_descriptor(net_rbio, &d)) | |
1767 | /* Non-pollable BIO */ | |
1768 | d.type = BIO_POLL_DESCRIPTOR_TYPE_NONE; | |
1769 | ||
1770 | if (!validate_poll_descriptor(&d)) | |
1771 | return 0; | |
1772 | } | |
1773 | ||
1774 | ossl_quic_reactor_set_poll_r(&ch->rtor, &d); | |
f538b421 HL |
1775 | ossl_quic_demux_set_bio(ch->demux, net_rbio); |
1776 | ch->net_rbio = net_rbio; | |
1777 | return 1; | |
1778 | } | |
1779 | ||
d1ac77b1 | 1780 | int ossl_quic_channel_set_net_wbio(QUIC_CHANNEL *ch, BIO *net_wbio) |
f538b421 HL |
1781 | { |
1782 | BIO_POLL_DESCRIPTOR d = {0}; | |
1783 | ||
1784 | if (ch->net_wbio == net_wbio) | |
1785 | return 1; | |
1786 | ||
1787 | if (net_wbio != NULL) { | |
1788 | if (!BIO_get_wpoll_descriptor(net_wbio, &d)) | |
1789 | /* Non-pollable BIO */ | |
1790 | d.type = BIO_POLL_DESCRIPTOR_TYPE_NONE; | |
1791 | ||
1792 | if (!validate_poll_descriptor(&d)) | |
1793 | return 0; | |
1794 | } | |
1795 | ||
1796 | ossl_quic_reactor_set_poll_w(&ch->rtor, &d); | |
f538b421 HL |
1797 | ossl_qtx_set_bio(ch->qtx, net_wbio); |
1798 | ch->net_wbio = net_wbio; | |
1799 | return 1; | |
1800 | } | |
1801 | ||
1802 | /* | |
1803 | * QUIC Channel: Lifecycle Events | |
1804 | * ============================== | |
1805 | */ | |
f538b421 HL |
1806 | int ossl_quic_channel_start(QUIC_CHANNEL *ch) |
1807 | { | |
b1b06da2 HL |
1808 | if (ch->is_server) |
1809 | /* | |
1810 | * This is not used by the server. The server moves to active | |
1811 | * automatically on receiving an incoming connection. | |
1812 | */ | |
1813 | return 0; | |
1814 | ||
f538b421 HL |
1815 | if (ch->state != QUIC_CHANNEL_STATE_IDLE) |
1816 | /* Calls to connect are idempotent */ | |
1817 | return 1; | |
1818 | ||
1819 | /* Inform QTX of peer address. */ | |
1820 | if (!ossl_quic_tx_packetiser_set_peer(ch->txp, &ch->cur_peer_addr)) | |
1821 | return 0; | |
1822 | ||
1823 | /* Plug in secrets for the Initial EL. */ | |
1824 | if (!ossl_quic_provide_initial_secret(ch->libctx, | |
1825 | ch->propq, | |
1826 | &ch->init_dcid, | |
091f532e | 1827 | ch->is_server, |
f538b421 HL |
1828 | ch->qrx, ch->qtx)) |
1829 | return 0; | |
1830 | ||
1831 | /* Change state. */ | |
1832 | ch->state = QUIC_CHANNEL_STATE_ACTIVE; | |
1833 | ch->doing_proactive_ver_neg = 0; /* not currently supported */ | |
1834 | ||
1835 | /* Handshake layer: start (e.g. send CH). */ | |
2723d705 | 1836 | if (!ossl_quic_tls_tick(ch->qtls)) |
f538b421 HL |
1837 | return 0; |
1838 | ||
ccd31037 | 1839 | ossl_quic_reactor_tick(&ch->rtor, 0); /* best effort */ |
f538b421 HL |
1840 | return 1; |
1841 | } | |
1842 | ||
1843 | /* Start a locally initiated connection shutdown. */ | |
e8043229 | 1844 | void ossl_quic_channel_local_close(QUIC_CHANNEL *ch, uint64_t app_error_code) |
f538b421 HL |
1845 | { |
1846 | QUIC_TERMINATE_CAUSE tcause = {0}; | |
1847 | ||
c12e1113 | 1848 | if (ossl_quic_channel_is_term_any(ch)) |
f538b421 HL |
1849 | return; |
1850 | ||
e8043229 HL |
1851 | tcause.app = 1; |
1852 | tcause.error_code = app_error_code; | |
df15e990 | 1853 | ch_start_terminating(ch, &tcause, 0); |
f538b421 HL |
1854 | } |
1855 | ||
1856 | static void free_token(const unsigned char *buf, size_t buf_len, void *arg) | |
1857 | { | |
1858 | OPENSSL_free((unsigned char *)buf); | |
1859 | } | |
1860 | ||
1861 | /* Called when a server asks us to do a retry. */ | |
1862 | static int ch_retry(QUIC_CHANNEL *ch, | |
1863 | const unsigned char *retry_token, | |
1864 | size_t retry_token_len, | |
1865 | const QUIC_CONN_ID *retry_scid) | |
1866 | { | |
1867 | void *buf; | |
1868 | ||
1869 | /* We change to using the SCID in the Retry packet as the DCID. */ | |
1870 | if (!ossl_quic_tx_packetiser_set_cur_dcid(ch->txp, retry_scid)) | |
1871 | return 0; | |
1872 | ||
1873 | /* | |
1874 | * Now we retry. We will release the Retry packet immediately, so copy | |
1875 | * the token. | |
1876 | */ | |
e28f512f | 1877 | if ((buf = OPENSSL_memdup(retry_token, retry_token_len)) == NULL) |
f538b421 HL |
1878 | return 0; |
1879 | ||
f538b421 HL |
1880 | ossl_quic_tx_packetiser_set_initial_token(ch->txp, buf, retry_token_len, |
1881 | free_token, NULL); | |
1882 | ||
1883 | ch->retry_scid = *retry_scid; | |
1884 | ch->doing_retry = 1; | |
1885 | ||
1886 | /* | |
1887 | * We need to stimulate the Initial EL to generate the first CRYPTO frame | |
1888 | * again. We can do this most cleanly by simply forcing the ACKM to consider | |
1889 | * the first Initial packet as lost, which it effectively was as the server | |
1890 | * hasn't processed it. This also maintains the desired behaviour with e.g. | |
1891 | * PNs not resetting and so on. | |
1892 | * | |
1893 | * The PN we used initially is always zero, because QUIC does not allow | |
1894 | * repeated retries. | |
1895 | */ | |
1896 | if (!ossl_ackm_mark_packet_pseudo_lost(ch->ackm, QUIC_PN_SPACE_INITIAL, | |
1897 | /*PN=*/0)) | |
1898 | return 0; | |
1899 | ||
1900 | /* | |
1901 | * Plug in new secrets for the Initial EL. This is the only time we change | |
1902 | * the secrets for an EL after we already provisioned it. | |
1903 | */ | |
1904 | if (!ossl_quic_provide_initial_secret(ch->libctx, | |
1905 | ch->propq, | |
1906 | &ch->retry_scid, | |
1907 | /*is_server=*/0, | |
1908 | ch->qrx, ch->qtx)) | |
1909 | return 0; | |
1910 | ||
1911 | return 1; | |
1912 | } | |
1913 | ||
1914 | /* Called when an EL is to be discarded. */ | |
1915 | static int ch_discard_el(QUIC_CHANNEL *ch, | |
1916 | uint32_t enc_level) | |
1917 | { | |
1918 | if (!ossl_assert(enc_level < QUIC_ENC_LEVEL_1RTT)) | |
1919 | return 0; | |
1920 | ||
1921 | if ((ch->el_discarded & (1U << enc_level)) != 0) | |
1922 | /* Already done. */ | |
1923 | return 1; | |
1924 | ||
1925 | /* Best effort for all of these. */ | |
1926 | ossl_quic_tx_packetiser_discard_enc_level(ch->txp, enc_level); | |
1927 | ossl_qrx_discard_enc_level(ch->qrx, enc_level); | |
1928 | ossl_qtx_discard_enc_level(ch->qtx, enc_level); | |
1929 | ||
1930 | if (enc_level != QUIC_ENC_LEVEL_0RTT) { | |
1931 | uint32_t pn_space = ossl_quic_enc_level_to_pn_space(enc_level); | |
1932 | ||
1933 | ossl_ackm_on_pkt_space_discarded(ch->ackm, pn_space); | |
1934 | ||
1935 | /* We should still have crypto streams at this point. */ | |
79534440 HL |
1936 | if (!ossl_assert(ch->crypto_send[pn_space] != NULL) |
1937 | || !ossl_assert(ch->crypto_recv[pn_space] != NULL)) | |
1938 | return 0; | |
f538b421 HL |
1939 | |
1940 | /* Get rid of the crypto stream state for the EL. */ | |
1941 | ossl_quic_sstream_free(ch->crypto_send[pn_space]); | |
1942 | ch->crypto_send[pn_space] = NULL; | |
1943 | ||
1944 | ossl_quic_rstream_free(ch->crypto_recv[pn_space]); | |
1945 | ch->crypto_recv[pn_space] = NULL; | |
1946 | } | |
1947 | ||
1948 | ch->el_discarded |= (1U << enc_level); | |
1949 | return 1; | |
1950 | } | |
1951 | ||
1952 | /* Intended to be called by the RXDP. */ | |
1953 | int ossl_quic_channel_on_handshake_confirmed(QUIC_CHANNEL *ch) | |
1954 | { | |
1955 | if (ch->handshake_confirmed) | |
1956 | return 1; | |
1957 | ||
1958 | if (!ch->handshake_complete) { | |
1959 | /* | |
1960 | * Does not make sense for handshake to be confirmed before it is | |
1961 | * completed. | |
1962 | */ | |
1963 | ossl_quic_channel_raise_protocol_error(ch, QUIC_ERR_PROTOCOL_VIOLATION, | |
1964 | OSSL_QUIC_FRAME_TYPE_HANDSHAKE_DONE, | |
1965 | "handshake cannot be confirmed " | |
1966 | "before it is completed"); | |
1967 | return 0; | |
1968 | } | |
1969 | ||
1970 | ch_discard_el(ch, QUIC_ENC_LEVEL_HANDSHAKE); | |
1971 | ch->handshake_confirmed = 1; | |
1972 | return 1; | |
1973 | } | |
1974 | ||
1975 | /* | |
1976 | * Master function used when we want to start tearing down a connection: | |
1977 | * | |
1978 | * - If the connection is still IDLE we can go straight to TERMINATED; | |
1979 | * | |
1980 | * - If we are already TERMINATED this is a no-op. | |
1981 | * | |
1982 | * - If we are TERMINATING - CLOSING and we have now got a CONNECTION_CLOSE | |
9bbc5b54 | 1983 | * from the peer (tcause->remote == 1), we move to TERMINATING - DRAINING. |
f538b421 HL |
1984 | * |
1985 | * - If we are TERMINATING - DRAINING, we remain here until the terminating | |
1986 | * timer expires. | |
1987 | * | |
1988 | * - Otherwise, we are in ACTIVE and move to TERMINATING - CLOSING. | |
1989 | * if we caused the termination (e.g. we have sent a CONNECTION_CLOSE). Note | |
1990 | * that we are considered to have caused a termination if we sent the first | |
1991 | * CONNECTION_CLOSE frame, even if it is caused by a peer protocol | |
1992 | * violation. If the peer sent the first CONNECTION_CLOSE frame, we move to | |
1993 | * TERMINATING - DRAINING. | |
1994 | * | |
1995 | * We record the termination cause structure passed on the first call only. | |
1996 | * Any successive calls have their termination cause data discarded; | |
1997 | * once we start sending a CONNECTION_CLOSE frame, we don't change the details | |
1998 | * in it. | |
1999 | */ | |
2000 | static void ch_start_terminating(QUIC_CHANNEL *ch, | |
df15e990 HL |
2001 | const QUIC_TERMINATE_CAUSE *tcause, |
2002 | int force_immediate) | |
f538b421 HL |
2003 | { |
2004 | switch (ch->state) { | |
75b2920a HL |
2005 | default: |
2006 | case QUIC_CHANNEL_STATE_IDLE: | |
2007 | ch->terminate_cause = *tcause; | |
2008 | ch_on_terminating_timeout(ch); | |
2009 | break; | |
2010 | ||
2011 | case QUIC_CHANNEL_STATE_ACTIVE: | |
75b2920a | 2012 | ch->terminate_cause = *tcause; |
df15e990 HL |
2013 | |
2014 | if (!force_immediate) { | |
2015 | ch->state = tcause->remote ? QUIC_CHANNEL_STATE_TERMINATING_DRAINING | |
2016 | : QUIC_CHANNEL_STATE_TERMINATING_CLOSING; | |
2017 | ch->terminate_deadline | |
b212d554 | 2018 | = ossl_time_add(get_time(ch), |
df15e990 HL |
2019 | ossl_time_multiply(ossl_ackm_get_pto_duration(ch->ackm), |
2020 | 3)); | |
2021 | ||
2022 | if (!tcause->remote) { | |
2023 | OSSL_QUIC_FRAME_CONN_CLOSE f = {0}; | |
2024 | ||
2025 | /* best effort */ | |
2026 | f.error_code = ch->terminate_cause.error_code; | |
2027 | f.frame_type = ch->terminate_cause.frame_type; | |
2028 | f.is_app = ch->terminate_cause.app; | |
2029 | ossl_quic_tx_packetiser_schedule_conn_close(ch->txp, &f); | |
2030 | ch->conn_close_queued = 1; | |
2031 | } | |
2032 | } else { | |
2033 | ch_on_terminating_timeout(ch); | |
75b2920a HL |
2034 | } |
2035 | break; | |
f538b421 | 2036 | |
75b2920a | 2037 | case QUIC_CHANNEL_STATE_TERMINATING_CLOSING: |
df15e990 HL |
2038 | if (force_immediate) |
2039 | ch_on_terminating_timeout(ch); | |
2040 | else if (tcause->remote) | |
75b2920a | 2041 | ch->state = QUIC_CHANNEL_STATE_TERMINATING_DRAINING; |
f538b421 | 2042 | |
75b2920a | 2043 | break; |
f538b421 | 2044 | |
75b2920a | 2045 | case QUIC_CHANNEL_STATE_TERMINATING_DRAINING: |
df15e990 HL |
2046 | /* |
2047 | * Other than in the force-immediate case, we remain here until the | |
2048 | * timout expires. | |
2049 | */ | |
2050 | if (force_immediate) | |
2051 | ch_on_terminating_timeout(ch); | |
2052 | ||
75b2920a | 2053 | break; |
f538b421 | 2054 | |
75b2920a HL |
2055 | case QUIC_CHANNEL_STATE_TERMINATED: |
2056 | /* No-op. */ | |
2057 | break; | |
f538b421 HL |
2058 | } |
2059 | } | |
2060 | ||
2061 | /* For RXDP use. */ | |
2062 | void ossl_quic_channel_on_remote_conn_close(QUIC_CHANNEL *ch, | |
2063 | OSSL_QUIC_FRAME_CONN_CLOSE *f) | |
2064 | { | |
2065 | QUIC_TERMINATE_CAUSE tcause = {0}; | |
2066 | ||
2067 | if (!ossl_quic_channel_is_active(ch)) | |
2068 | return; | |
2069 | ||
2070 | tcause.remote = 1; | |
2071 | tcause.app = f->is_app; | |
2072 | tcause.error_code = f->error_code; | |
2073 | tcause.frame_type = f->frame_type; | |
2074 | ||
df15e990 HL |
2075 | ch_start_terminating(ch, &tcause, 0); |
2076 | } | |
2077 | ||
2078 | static void ch_raise_net_error(QUIC_CHANNEL *ch) | |
2079 | { | |
2080 | QUIC_TERMINATE_CAUSE tcause = {0}; | |
2081 | ||
2082 | tcause.error_code = QUIC_ERR_INTERNAL_ERROR; | |
2083 | ||
2084 | /* | |
2085 | * Skip Terminating state and go directly to Terminated, no point trying to | |
2086 | * send CONNECTION_CLOSE if we cannot communicate. | |
2087 | */ | |
2088 | ch_start_terminating(ch, &tcause, 1); | |
f538b421 HL |
2089 | } |
2090 | ||
2091 | void ossl_quic_channel_raise_protocol_error(QUIC_CHANNEL *ch, | |
2092 | uint64_t error_code, | |
2093 | uint64_t frame_type, | |
2094 | const char *reason) | |
2095 | { | |
2096 | QUIC_TERMINATE_CAUSE tcause = {0}; | |
2097 | ||
2098 | tcause.error_code = error_code; | |
2099 | tcause.frame_type = frame_type; | |
2100 | ||
df15e990 | 2101 | ch_start_terminating(ch, &tcause, 0); |
f538b421 HL |
2102 | } |
2103 | ||
2104 | /* | |
2105 | * Called once the terminating timer expires, meaning we move from TERMINATING | |
2106 | * to TERMINATED. | |
2107 | */ | |
2108 | static void ch_on_terminating_timeout(QUIC_CHANNEL *ch) | |
2109 | { | |
2110 | ch->state = QUIC_CHANNEL_STATE_TERMINATED; | |
2111 | } | |
2112 | ||
2113 | /* | |
2114 | * Updates our idle deadline. Called when an event happens which should bump the | |
2115 | * idle timeout. | |
2116 | */ | |
2117 | static void ch_update_idle(QUIC_CHANNEL *ch) | |
2118 | { | |
2119 | if (ch->max_idle_timeout == 0) | |
2120 | ch->idle_deadline = ossl_time_infinite(); | |
2121 | else | |
b212d554 | 2122 | ch->idle_deadline = ossl_time_add(get_time(ch), |
f538b421 HL |
2123 | ossl_ms2time(ch->max_idle_timeout)); |
2124 | } | |
2125 | ||
3b1ab5a3 HL |
2126 | /* |
2127 | * Updates our ping deadline, which determines when we next generate a ping if | |
2128 | * we don't have any other ACK-eliciting frames to send. | |
2129 | */ | |
2130 | static void ch_update_ping_deadline(QUIC_CHANNEL *ch) | |
2131 | { | |
2132 | if (ch->max_idle_timeout > 0) { | |
2133 | /* | |
9cf091a3 HL |
2134 | * Maximum amount of time without traffic before we send a PING to keep |
2135 | * the connection open. Usually we use max_idle_timeout/2, but ensure | |
2136 | * the period never exceeds the assumed NAT interval to ensure NAT | |
2137 | * devices don't have their state time out (RFC 9000 s. 10.1.2). | |
3b1ab5a3 HL |
2138 | */ |
2139 | OSSL_TIME max_span | |
2140 | = ossl_time_divide(ossl_ms2time(ch->max_idle_timeout), 2); | |
2141 | ||
9cf091a3 | 2142 | max_span = ossl_time_min(max_span, MAX_NAT_INTERVAL); |
3b1ab5a3 HL |
2143 | |
2144 | ch->ping_deadline = ossl_time_add(get_time(ch), max_span); | |
2145 | } else { | |
2146 | ch->ping_deadline = ossl_time_infinite(); | |
2147 | } | |
2148 | } | |
2149 | ||
f538b421 HL |
2150 | /* Called when the idle timeout expires. */ |
2151 | static void ch_on_idle_timeout(QUIC_CHANNEL *ch) | |
2152 | { | |
2153 | /* | |
2154 | * Idle timeout does not have an error code associated with it because a | |
2155 | * CONN_CLOSE is never sent for it. We shouldn't use this data once we reach | |
2156 | * TERMINATED anyway. | |
2157 | */ | |
2158 | ch->terminate_cause.app = 0; | |
2159 | ch->terminate_cause.error_code = UINT64_MAX; | |
2160 | ch->terminate_cause.frame_type = 0; | |
2161 | ||
2162 | ch->state = QUIC_CHANNEL_STATE_TERMINATED; | |
2163 | } | |
b1b06da2 HL |
2164 | |
2165 | /* Called when we, as a server, get a new incoming connection. */ | |
2166 | static int ch_server_on_new_conn(QUIC_CHANNEL *ch, const BIO_ADDR *peer, | |
2167 | const QUIC_CONN_ID *peer_scid, | |
2168 | const QUIC_CONN_ID *peer_dcid) | |
2169 | { | |
2170 | if (!ossl_assert(ch->state == QUIC_CHANNEL_STATE_IDLE && ch->is_server)) | |
2171 | return 0; | |
2172 | ||
2173 | /* Generate a SCID we will use for the connection. */ | |
2174 | if (!gen_rand_conn_id(ch->libctx, INIT_DCID_LEN, | |
2175 | &ch->cur_local_dcid)) | |
2176 | return 0; | |
2177 | ||
2178 | /* Note our newly learnt peer address and CIDs. */ | |
2179 | ch->cur_peer_addr = *peer; | |
2180 | ch->init_dcid = *peer_dcid; | |
2181 | ch->cur_remote_dcid = *peer_scid; | |
2182 | ||
2183 | /* Inform QTX of peer address. */ | |
2184 | if (!ossl_quic_tx_packetiser_set_peer(ch->txp, &ch->cur_peer_addr)) | |
2185 | return 0; | |
2186 | ||
2187 | /* Inform TXP of desired CIDs. */ | |
2188 | if (!ossl_quic_tx_packetiser_set_cur_dcid(ch->txp, &ch->cur_remote_dcid)) | |
2189 | return 0; | |
2190 | ||
2191 | if (!ossl_quic_tx_packetiser_set_cur_scid(ch->txp, &ch->cur_local_dcid)) | |
2192 | return 0; | |
2193 | ||
2194 | /* Plug in secrets for the Initial EL. */ | |
2195 | if (!ossl_quic_provide_initial_secret(ch->libctx, | |
2196 | ch->propq, | |
2197 | &ch->init_dcid, | |
2198 | /*is_server=*/1, | |
2199 | ch->qrx, ch->qtx)) | |
2200 | return 0; | |
2201 | ||
2202 | /* Register our local DCID in the DEMUX. */ | |
2203 | if (!ossl_qrx_add_dst_conn_id(ch->qrx, &ch->cur_local_dcid)) | |
2204 | return 0; | |
2205 | ||
2206 | /* Change state. */ | |
2207 | ch->state = QUIC_CHANNEL_STATE_ACTIVE; | |
2208 | ch->doing_proactive_ver_neg = 0; /* not currently supported */ | |
2209 | return 1; | |
2210 | } | |
d03fe5de MC |
2211 | |
2212 | SSL *ossl_quic_channel_get0_ssl(QUIC_CHANNEL *ch) | |
2213 | { | |
2214 | return ch->tls; | |
2215 | } | |
2dbc39de HL |
2216 | |
2217 | QUIC_STREAM *ossl_quic_channel_new_stream(QUIC_CHANNEL *ch, int is_uni) | |
2218 | { | |
2219 | QUIC_STREAM *qs; | |
2220 | int type = 0; | |
2221 | uint64_t stream_id, *p_next_ordinal; | |
2222 | ||
2223 | type |= ch->is_server ? QUIC_STREAM_INITIATOR_SERVER | |
2224 | : QUIC_STREAM_INITIATOR_CLIENT; | |
2225 | ||
2226 | if (is_uni) { | |
2227 | p_next_ordinal = &ch->next_local_stream_ordinal_uni; | |
2228 | type |= QUIC_STREAM_DIR_UNI; | |
2229 | } else { | |
2230 | p_next_ordinal = &ch->next_local_stream_ordinal_bidi; | |
2231 | type |= QUIC_STREAM_DIR_BIDI; | |
2232 | } | |
2233 | ||
2234 | if (*p_next_ordinal >= ((uint64_t)1) << 62) | |
2235 | return NULL; | |
2236 | ||
2237 | stream_id = ((*p_next_ordinal) << 2) | type; | |
2238 | ||
2239 | if ((qs = ossl_quic_stream_map_alloc(&ch->qsm, stream_id, type)) == NULL) | |
2240 | return NULL; | |
2241 | ||
2242 | ++*p_next_ordinal; | |
2243 | return qs; | |
2244 | } |