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Commit | Line | Data |
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f538b421 | 1 | /* |
da1c088f | 2 | * Copyright 2022-2023 The OpenSSL Project Authors. All Rights Reserved. |
f538b421 HL |
3 | * |
4 | * Licensed under the Apache License 2.0 (the "License"). You may not use | |
5 | * this file except in compliance with the License. You can obtain a copy | |
6 | * in the file LICENSE in the source distribution or at | |
7 | * https://www.openssl.org/source/license.html | |
8 | */ | |
9 | ||
9c3ea4e1 TM |
10 | #include <openssl/rand.h> |
11 | #include <openssl/err.h> | |
f538b421 HL |
12 | #include "internal/quic_channel.h" |
13 | #include "internal/quic_error.h" | |
14 | #include "internal/quic_rx_depack.h" | |
15 | #include "../ssl_local.h" | |
16 | #include "quic_channel_local.h" | |
f538b421 | 17 | |
b1b06da2 HL |
18 | /* |
19 | * NOTE: While this channel implementation currently has basic server support, | |
20 | * this functionality has been implemented for internal testing purposes and is | |
21 | * not suitable for network use. In particular, it does not implement address | |
22 | * validation, anti-amplification or retry logic. | |
23 | * | |
44cb36d0 TM |
24 | * TODO(QUIC SERVER): Implement address validation and anti-amplification |
25 | * TODO(QUIC SERVER): Implement retry logic | |
b1b06da2 HL |
26 | */ |
27 | ||
f538b421 HL |
28 | #define INIT_DCID_LEN 8 |
29 | #define INIT_CRYPTO_BUF_LEN 8192 | |
30 | #define INIT_APP_BUF_LEN 8192 | |
31 | ||
9cf091a3 HL |
32 | /* |
33 | * Interval before we force a PING to ensure NATs don't timeout. This is based | |
0815b725 | 34 | * on the lowest commonly seen value of 30 seconds as cited in RFC 9000 s. |
9cf091a3 HL |
35 | * 10.1.2. |
36 | */ | |
37 | #define MAX_NAT_INTERVAL (ossl_ms2time(25000)) | |
38 | ||
f13868de HL |
39 | /* |
40 | * Our maximum ACK delay on the TX side. This is up to us to choose. Note that | |
41 | * this could differ from QUIC_DEFAULT_MAX_DELAY in future as that is a protocol | |
42 | * value which determines the value of the maximum ACK delay if the | |
43 | * max_ack_delay transport parameter is not set. | |
44 | */ | |
45 | #define DEFAULT_MAX_ACK_DELAY QUIC_DEFAULT_MAX_ACK_DELAY | |
46 | ||
982dae89 | 47 | static void ch_save_err_state(QUIC_CHANNEL *ch); |
3bf4dc8c | 48 | static void ch_rx_pre(QUIC_CHANNEL *ch); |
f538b421 HL |
49 | static int ch_rx(QUIC_CHANNEL *ch); |
50 | static int ch_tx(QUIC_CHANNEL *ch); | |
ccd31037 | 51 | static void ch_tick(QUIC_TICK_RESULT *res, void *arg, uint32_t flags); |
f538b421 HL |
52 | static void ch_rx_handle_packet(QUIC_CHANNEL *ch); |
53 | static OSSL_TIME ch_determine_next_tick_deadline(QUIC_CHANNEL *ch); | |
54 | static int ch_retry(QUIC_CHANNEL *ch, | |
55 | const unsigned char *retry_token, | |
56 | size_t retry_token_len, | |
57 | const QUIC_CONN_ID *retry_scid); | |
58 | static void ch_cleanup(QUIC_CHANNEL *ch); | |
59 | static int ch_generate_transport_params(QUIC_CHANNEL *ch); | |
60 | static int ch_on_transport_params(const unsigned char *params, | |
61 | size_t params_len, | |
62 | void *arg); | |
63 | static int ch_on_handshake_alert(void *arg, unsigned char alert_code); | |
64 | static int ch_on_handshake_complete(void *arg); | |
65 | static int ch_on_handshake_yield_secret(uint32_t enc_level, int direction, | |
66 | uint32_t suite_id, EVP_MD *md, | |
67 | const unsigned char *secret, | |
68 | size_t secret_len, | |
69 | void *arg); | |
7257188b MC |
70 | static int ch_on_crypto_recv_record(const unsigned char **buf, |
71 | size_t *bytes_read, void *arg); | |
72 | static int ch_on_crypto_release_record(size_t bytes_read, void *arg); | |
f538b421 HL |
73 | static int crypto_ensure_empty(QUIC_RSTREAM *rstream); |
74 | static int ch_on_crypto_send(const unsigned char *buf, size_t buf_len, | |
75 | size_t *consumed, void *arg); | |
76 | static OSSL_TIME get_time(void *arg); | |
77 | static uint64_t get_stream_limit(int uni, void *arg); | |
dfe5e7fa | 78 | static int rx_late_validate(QUIC_PN pn, int pn_space, void *arg); |
8a65e7a5 | 79 | static void rxku_detected(QUIC_PN pn, void *arg); |
f538b421 HL |
80 | static int ch_retry(QUIC_CHANNEL *ch, |
81 | const unsigned char *retry_token, | |
82 | size_t retry_token_len, | |
83 | const QUIC_CONN_ID *retry_scid); | |
84 | static void ch_update_idle(QUIC_CHANNEL *ch); | |
85 | static int ch_discard_el(QUIC_CHANNEL *ch, | |
86 | uint32_t enc_level); | |
87 | static void ch_on_idle_timeout(QUIC_CHANNEL *ch); | |
88 | static void ch_update_idle(QUIC_CHANNEL *ch); | |
3b1ab5a3 | 89 | static void ch_update_ping_deadline(QUIC_CHANNEL *ch); |
cdd91631 | 90 | static void ch_stateless_reset(QUIC_CHANNEL *ch); |
df15e990 | 91 | static void ch_raise_net_error(QUIC_CHANNEL *ch); |
f538b421 HL |
92 | static void ch_on_terminating_timeout(QUIC_CHANNEL *ch); |
93 | static void ch_start_terminating(QUIC_CHANNEL *ch, | |
df15e990 HL |
94 | const QUIC_TERMINATE_CAUSE *tcause, |
95 | int force_immediate); | |
cdd91631 | 96 | static int ch_stateless_reset_token_handler(const unsigned char *data, size_t datalen, void *arg); |
b1b06da2 HL |
97 | static void ch_default_packet_handler(QUIC_URXE *e, void *arg); |
98 | static int ch_server_on_new_conn(QUIC_CHANNEL *ch, const BIO_ADDR *peer, | |
99 | const QUIC_CONN_ID *peer_scid, | |
100 | const QUIC_CONN_ID *peer_dcid); | |
8a65e7a5 HL |
101 | static void ch_on_txp_ack_tx(const OSSL_QUIC_FRAME_ACK *ack, uint32_t pn_space, |
102 | void *arg); | |
777a8a7f HL |
103 | static void ch_rx_handle_version_neg(QUIC_CHANNEL *ch, OSSL_QRX_PKT *pkt); |
104 | static void ch_raise_version_neg_failure(QUIC_CHANNEL *ch); | |
f538b421 | 105 | |
cdd91631 P |
106 | DEFINE_LHASH_OF_EX(QUIC_SRT_ELEM); |
107 | ||
f538b421 HL |
108 | static int gen_rand_conn_id(OSSL_LIB_CTX *libctx, size_t len, QUIC_CONN_ID *cid) |
109 | { | |
110 | if (len > QUIC_MAX_CONN_ID_LEN) | |
111 | return 0; | |
112 | ||
113 | cid->id_len = (unsigned char)len; | |
114 | ||
115 | if (RAND_bytes_ex(libctx, cid->id, len, len * 8) != 1) { | |
96014840 | 116 | ERR_raise(ERR_LIB_SSL, ERR_R_RAND_LIB); |
f538b421 HL |
117 | cid->id_len = 0; |
118 | return 0; | |
119 | } | |
120 | ||
121 | return 1; | |
122 | } | |
123 | ||
cdd91631 P |
124 | static unsigned long chan_reset_token_hash(const QUIC_SRT_ELEM *a) |
125 | { | |
126 | unsigned long h; | |
127 | ||
128 | assert(sizeof(h) <= sizeof(a->token)); | |
129 | memcpy(&h, &a->token, sizeof(h)); | |
130 | return h; | |
131 | } | |
132 | ||
133 | static int chan_reset_token_cmp(const QUIC_SRT_ELEM *a, const QUIC_SRT_ELEM *b) | |
134 | { | |
135 | /* RFC 9000 s. 10.3.1: | |
136 | * When comparing a datagram to stateless reset token values, | |
137 | * endpoints MUST perform the comparison without leaking | |
138 | * information about the value of the token. For example, | |
139 | * performing this comparison in constant time protects the | |
140 | * value of individual stateless reset tokens from information | |
141 | * leakage through timing side channels. | |
142 | * | |
143 | * TODO(QUIC FUTURE): make this a memcmp when obfuscation is done and update | |
144 | * comment above. | |
145 | */ | |
146 | return CRYPTO_memcmp(&a->token, &b->token, sizeof(a->token)); | |
147 | } | |
148 | ||
149 | static int reset_token_obfuscate(QUIC_SRT_ELEM *out, const unsigned char *in) | |
150 | { | |
151 | /* | |
152 | * TODO(QUIC FUTURE): update this to AES encrypt the token in ECB mode with a | |
153 | * random (per channel) key. | |
154 | */ | |
155 | memcpy(&out->token, in, sizeof(out->token)); | |
156 | return 1; | |
157 | } | |
158 | ||
159 | /* | |
160 | * Add a stateless reset token to the channel | |
161 | */ | |
162 | static int chan_add_reset_token(QUIC_CHANNEL *ch, const unsigned char *new, | |
163 | uint64_t seq_num) | |
164 | { | |
165 | QUIC_SRT_ELEM *srte; | |
166 | int err; | |
167 | ||
168 | /* Add to list by sequence number (always the tail) */ | |
169 | if ((srte = OPENSSL_malloc(sizeof(*srte))) == NULL) | |
170 | return 0; | |
171 | ||
172 | ossl_list_stateless_reset_tokens_init_elem(srte); | |
173 | ossl_list_stateless_reset_tokens_insert_tail(&ch->srt_list_seq, srte); | |
174 | reset_token_obfuscate(srte, new); | |
175 | srte->seq_num = seq_num; | |
176 | ||
177 | lh_QUIC_SRT_ELEM_insert(ch->srt_hash_tok, srte); | |
178 | err = lh_QUIC_SRT_ELEM_error(ch->srt_hash_tok); | |
179 | if (err > 0) { | |
180 | ossl_list_stateless_reset_tokens_remove(&ch->srt_list_seq, srte); | |
181 | OPENSSL_free(srte); | |
182 | return 0; | |
183 | } | |
184 | return 1; | |
185 | } | |
186 | ||
187 | /* | |
188 | * Remove a stateless reset token from the channel | |
189 | * If the token isn't known, we just ignore the remove request which is safe. | |
190 | */ | |
191 | static void chan_remove_reset_token(QUIC_CHANNEL *ch, uint64_t seq_num) | |
192 | { | |
193 | QUIC_SRT_ELEM *srte; | |
194 | ||
195 | /* | |
196 | * Because the list is ordered and we only ever remove CIDs in order, | |
197 | * this loop should never iterate, but safer to provide the option. | |
198 | */ | |
199 | for (srte = ossl_list_stateless_reset_tokens_head(&ch->srt_list_seq); | |
200 | srte != NULL; | |
201 | srte = ossl_list_stateless_reset_tokens_next(srte)) { | |
202 | if (srte->seq_num > seq_num) | |
203 | return; | |
204 | if (srte->seq_num == seq_num) { | |
205 | ossl_list_stateless_reset_tokens_remove(&ch->srt_list_seq, srte); | |
206 | (void)lh_QUIC_SRT_ELEM_delete(ch->srt_hash_tok, srte); | |
207 | OPENSSL_free(srte); | |
208 | return; | |
209 | } | |
210 | } | |
211 | } | |
212 | ||
213 | /* | |
214 | * This is called by the demux whenever a new datagram arrives | |
215 | * | |
216 | * TODO(QUIC FUTURE): optimise this to only be called for unparsable packets | |
217 | */ | |
218 | static int ch_stateless_reset_token_handler(const unsigned char *data, | |
219 | size_t datalen, void *arg) | |
220 | { | |
221 | QUIC_SRT_ELEM srte; | |
222 | QUIC_CHANNEL *ch = (QUIC_CHANNEL *)arg; | |
223 | ||
224 | /* | |
225 | * Perform some fast and cheap checks for a packet not being a stateless | |
226 | * reset token. RFC 9000 s. 10.3 specifies this layout for stateless | |
227 | * reset packets: | |
228 | * | |
229 | * Stateless Reset { | |
230 | * Fixed Bits (2) = 1, | |
231 | * Unpredictable Bits (38..), | |
232 | * Stateless Reset Token (128), | |
233 | * } | |
234 | * | |
235 | * It also specifies: | |
236 | * However, endpoints MUST treat any packet ending in a valid | |
237 | * stateless reset token as a Stateless Reset, as other QUIC | |
238 | * versions might allow the use of a long header. | |
239 | * | |
240 | * We can rapidly check for the minimum length and that the first pair | |
241 | * of bits in the first byte are 01 or 11. | |
242 | * | |
243 | * The function returns 1 if it is a stateless reset packet, 0 if it isn't | |
244 | * and -1 if an error was encountered. | |
245 | */ | |
246 | if (datalen < QUIC_STATELESS_RESET_TOKEN_LEN + 5 || (0100 & *data) != 0100) | |
247 | return 0; | |
248 | memset(&srte, 0, sizeof(srte)); | |
249 | if (!reset_token_obfuscate(&srte, data + datalen - sizeof(srte.token))) | |
250 | return -1; | |
251 | return lh_QUIC_SRT_ELEM_retrieve(ch->srt_hash_tok, &srte) != NULL; | |
252 | } | |
253 | ||
f538b421 HL |
254 | /* |
255 | * QUIC Channel Initialization and Teardown | |
256 | * ======================================== | |
257 | */ | |
89b0948e HL |
258 | #define DEFAULT_INIT_CONN_RXFC_WND (768 * 1024) |
259 | #define DEFAULT_CONN_RXFC_MAX_WND_MUL 20 | |
0815b725 | 260 | |
89b0948e HL |
261 | #define DEFAULT_INIT_STREAM_RXFC_WND (512 * 1024) |
262 | #define DEFAULT_STREAM_RXFC_MAX_WND_MUL 12 | |
0815b725 | 263 | |
a6b6ea17 HL |
264 | #define DEFAULT_INIT_CONN_MAX_STREAMS 100 |
265 | ||
f538b421 HL |
266 | static int ch_init(QUIC_CHANNEL *ch) |
267 | { | |
268 | OSSL_QUIC_TX_PACKETISER_ARGS txp_args = {0}; | |
269 | OSSL_QTX_ARGS qtx_args = {0}; | |
270 | OSSL_QRX_ARGS qrx_args = {0}; | |
2723d705 | 271 | QUIC_TLS_ARGS tls_args = {0}; |
f538b421 | 272 | uint32_t pn_space; |
b1b06da2 | 273 | size_t rx_short_cid_len = ch->is_server ? INIT_DCID_LEN : 0; |
f538b421 | 274 | |
cdd91631 P |
275 | ossl_list_stateless_reset_tokens_init(&ch->srt_list_seq); |
276 | ch->srt_hash_tok = lh_QUIC_SRT_ELEM_new(&chan_reset_token_hash, | |
277 | &chan_reset_token_cmp); | |
278 | if (ch->srt_hash_tok == NULL) | |
279 | goto err; | |
280 | ||
b1b06da2 HL |
281 | /* For clients, generate our initial DCID. */ |
282 | if (!ch->is_server | |
283 | && !gen_rand_conn_id(ch->libctx, INIT_DCID_LEN, &ch->init_dcid)) | |
f538b421 HL |
284 | goto err; |
285 | ||
286 | /* We plug in a network write BIO to the QTX later when we get one. */ | |
c2212dc1 | 287 | qtx_args.libctx = ch->libctx; |
f538b421 HL |
288 | qtx_args.mdpl = QUIC_MIN_INITIAL_DGRAM_LEN; |
289 | ch->rx_max_udp_payload_size = qtx_args.mdpl; | |
290 | ||
27195689 MC |
291 | ch->ping_deadline = ossl_time_infinite(); |
292 | ||
f538b421 HL |
293 | ch->qtx = ossl_qtx_new(&qtx_args); |
294 | if (ch->qtx == NULL) | |
295 | goto err; | |
296 | ||
297 | ch->txpim = ossl_quic_txpim_new(); | |
298 | if (ch->txpim == NULL) | |
299 | goto err; | |
300 | ||
301 | ch->cfq = ossl_quic_cfq_new(); | |
302 | if (ch->cfq == NULL) | |
303 | goto err; | |
304 | ||
305 | if (!ossl_quic_txfc_init(&ch->conn_txfc, NULL)) | |
306 | goto err; | |
307 | ||
0815b725 HL |
308 | /* |
309 | * Note: The TP we transmit governs what the peer can transmit and thus | |
310 | * applies to the RXFC. | |
311 | */ | |
312 | ch->tx_init_max_stream_data_bidi_local = DEFAULT_INIT_STREAM_RXFC_WND; | |
313 | ch->tx_init_max_stream_data_bidi_remote = DEFAULT_INIT_STREAM_RXFC_WND; | |
314 | ch->tx_init_max_stream_data_uni = DEFAULT_INIT_STREAM_RXFC_WND; | |
315 | ||
f538b421 | 316 | if (!ossl_quic_rxfc_init(&ch->conn_rxfc, NULL, |
0815b725 | 317 | DEFAULT_INIT_CONN_RXFC_WND, |
e8fe7a21 HL |
318 | DEFAULT_CONN_RXFC_MAX_WND_MUL * |
319 | DEFAULT_INIT_CONN_RXFC_WND, | |
b212d554 | 320 | get_time, ch)) |
f538b421 HL |
321 | goto err; |
322 | ||
098914d0 HL |
323 | for (pn_space = QUIC_PN_SPACE_INITIAL; pn_space < QUIC_PN_SPACE_NUM; ++pn_space) |
324 | if (!ossl_quic_rxfc_init_standalone(&ch->crypto_rxfc[pn_space], | |
325 | INIT_CRYPTO_BUF_LEN, | |
326 | get_time, ch)) | |
327 | goto err; | |
328 | ||
1051b4a0 HL |
329 | if (!ossl_quic_rxfc_init_standalone(&ch->max_streams_bidi_rxfc, |
330 | DEFAULT_INIT_CONN_MAX_STREAMS, | |
331 | get_time, ch)) | |
a6b6ea17 HL |
332 | goto err; |
333 | ||
1051b4a0 HL |
334 | if (!ossl_quic_rxfc_init_standalone(&ch->max_streams_uni_rxfc, |
335 | DEFAULT_INIT_CONN_MAX_STREAMS, | |
336 | get_time, ch)) | |
a6b6ea17 HL |
337 | goto err; |
338 | ||
f538b421 HL |
339 | if (!ossl_statm_init(&ch->statm)) |
340 | goto err; | |
341 | ||
342 | ch->have_statm = 1; | |
f6f45c55 | 343 | ch->cc_method = &ossl_cc_newreno_method; |
66ec5348 | 344 | if ((ch->cc_data = ch->cc_method->new(get_time, ch)) == NULL) |
f538b421 HL |
345 | goto err; |
346 | ||
b212d554 | 347 | if ((ch->ackm = ossl_ackm_new(get_time, ch, &ch->statm, |
f538b421 HL |
348 | ch->cc_method, ch->cc_data)) == NULL) |
349 | goto err; | |
350 | ||
a6b6ea17 HL |
351 | if (!ossl_quic_stream_map_init(&ch->qsm, get_stream_limit, ch, |
352 | &ch->max_streams_bidi_rxfc, | |
5915a900 HL |
353 | &ch->max_streams_uni_rxfc, |
354 | ch->is_server)) | |
f538b421 HL |
355 | goto err; |
356 | ||
357 | ch->have_qsm = 1; | |
358 | ||
359 | /* We use a zero-length SCID. */ | |
a6b6ea17 HL |
360 | txp_args.cur_dcid = ch->init_dcid; |
361 | txp_args.ack_delay_exponent = 3; | |
362 | txp_args.qtx = ch->qtx; | |
363 | txp_args.txpim = ch->txpim; | |
364 | txp_args.cfq = ch->cfq; | |
365 | txp_args.ackm = ch->ackm; | |
366 | txp_args.qsm = &ch->qsm; | |
367 | txp_args.conn_txfc = &ch->conn_txfc; | |
368 | txp_args.conn_rxfc = &ch->conn_rxfc; | |
369 | txp_args.max_streams_bidi_rxfc = &ch->max_streams_bidi_rxfc; | |
370 | txp_args.max_streams_uni_rxfc = &ch->max_streams_uni_rxfc; | |
371 | txp_args.cc_method = ch->cc_method; | |
372 | txp_args.cc_data = ch->cc_data; | |
373 | txp_args.now = get_time; | |
374 | txp_args.now_arg = ch; | |
45454ccc | 375 | |
f538b421 HL |
376 | for (pn_space = QUIC_PN_SPACE_INITIAL; pn_space < QUIC_PN_SPACE_NUM; ++pn_space) { |
377 | ch->crypto_send[pn_space] = ossl_quic_sstream_new(INIT_CRYPTO_BUF_LEN); | |
378 | if (ch->crypto_send[pn_space] == NULL) | |
379 | goto err; | |
380 | ||
381 | txp_args.crypto[pn_space] = ch->crypto_send[pn_space]; | |
382 | } | |
383 | ||
384 | ch->txp = ossl_quic_tx_packetiser_new(&txp_args); | |
385 | if (ch->txp == NULL) | |
386 | goto err; | |
387 | ||
8a65e7a5 HL |
388 | ossl_quic_tx_packetiser_set_ack_tx_cb(ch->txp, ch_on_txp_ack_tx, ch); |
389 | ||
b1b06da2 HL |
390 | if ((ch->demux = ossl_quic_demux_new(/*BIO=*/NULL, |
391 | /*Short CID Len=*/rx_short_cid_len, | |
b212d554 | 392 | get_time, ch)) == NULL) |
f538b421 HL |
393 | goto err; |
394 | ||
cdd91631 P |
395 | /* |
396 | * Setup a handler to detect stateless reset tokens. | |
397 | */ | |
398 | ossl_quic_demux_set_stateless_reset_handler(ch->demux, | |
399 | &ch_stateless_reset_token_handler, | |
400 | ch); | |
401 | ||
b1b06da2 HL |
402 | /* |
403 | * If we are a server, setup our handler for packets not corresponding to | |
404 | * any known DCID on our end. This is for handling clients establishing new | |
405 | * connections. | |
406 | */ | |
407 | if (ch->is_server) | |
408 | ossl_quic_demux_set_default_handler(ch->demux, | |
409 | ch_default_packet_handler, | |
410 | ch); | |
411 | ||
c2212dc1 | 412 | qrx_args.libctx = ch->libctx; |
f538b421 | 413 | qrx_args.demux = ch->demux; |
b1b06da2 | 414 | qrx_args.short_conn_id_len = rx_short_cid_len; |
f538b421 HL |
415 | qrx_args.max_deferred = 32; |
416 | ||
417 | if ((ch->qrx = ossl_qrx_new(&qrx_args)) == NULL) | |
418 | goto err; | |
419 | ||
dfe5e7fa HL |
420 | if (!ossl_qrx_set_late_validation_cb(ch->qrx, |
421 | rx_late_validate, | |
422 | ch)) | |
f538b421 HL |
423 | goto err; |
424 | ||
8a65e7a5 HL |
425 | if (!ossl_qrx_set_key_update_cb(ch->qrx, |
426 | rxku_detected, | |
427 | ch)) | |
428 | goto err; | |
429 | ||
b1b06da2 | 430 | if (!ch->is_server && !ossl_qrx_add_dst_conn_id(ch->qrx, &txp_args.cur_scid)) |
f538b421 HL |
431 | goto err; |
432 | ||
433 | for (pn_space = QUIC_PN_SPACE_INITIAL; pn_space < QUIC_PN_SPACE_NUM; ++pn_space) { | |
2113ea58 | 434 | ch->crypto_recv[pn_space] = ossl_quic_rstream_new(NULL, NULL, 0); |
f538b421 HL |
435 | if (ch->crypto_recv[pn_space] == NULL) |
436 | goto err; | |
437 | } | |
438 | ||
2723d705 MC |
439 | /* Plug in the TLS handshake layer. */ |
440 | tls_args.s = ch->tls; | |
441 | tls_args.crypto_send_cb = ch_on_crypto_send; | |
442 | tls_args.crypto_send_cb_arg = ch; | |
7257188b MC |
443 | tls_args.crypto_recv_rcd_cb = ch_on_crypto_recv_record; |
444 | tls_args.crypto_recv_rcd_cb_arg = ch; | |
445 | tls_args.crypto_release_rcd_cb = ch_on_crypto_release_record; | |
446 | tls_args.crypto_release_rcd_cb_arg = ch; | |
2723d705 MC |
447 | tls_args.yield_secret_cb = ch_on_handshake_yield_secret; |
448 | tls_args.yield_secret_cb_arg = ch; | |
449 | tls_args.got_transport_params_cb = ch_on_transport_params; | |
450 | tls_args.got_transport_params_cb_arg= ch; | |
451 | tls_args.handshake_complete_cb = ch_on_handshake_complete; | |
452 | tls_args.handshake_complete_cb_arg = ch; | |
453 | tls_args.alert_cb = ch_on_handshake_alert; | |
454 | tls_args.alert_cb_arg = ch; | |
455 | tls_args.is_server = ch->is_server; | |
456 | ||
457 | if ((ch->qtls = ossl_quic_tls_new(&tls_args)) == NULL) | |
f538b421 HL |
458 | goto err; |
459 | ||
f13868de | 460 | ch->tx_max_ack_delay = DEFAULT_MAX_ACK_DELAY; |
4648eac5 HL |
461 | ch->rx_max_ack_delay = QUIC_DEFAULT_MAX_ACK_DELAY; |
462 | ch->rx_ack_delay_exp = QUIC_DEFAULT_ACK_DELAY_EXP; | |
463 | ch->rx_active_conn_id_limit = QUIC_MIN_ACTIVE_CONN_ID_LIMIT; | |
464 | ch->max_idle_timeout = QUIC_DEFAULT_IDLE_TIMEOUT; | |
465 | ch->tx_enc_level = QUIC_ENC_LEVEL_INITIAL; | |
466 | ch->rx_enc_level = QUIC_ENC_LEVEL_INITIAL; | |
16f3b542 | 467 | ch->txku_threshold_override = UINT64_MAX; |
4648eac5 | 468 | |
f13868de HL |
469 | ossl_ackm_set_tx_max_ack_delay(ch->ackm, ossl_ms2time(ch->tx_max_ack_delay)); |
470 | ossl_ackm_set_rx_max_ack_delay(ch->ackm, ossl_ms2time(ch->rx_max_ack_delay)); | |
471 | ||
f538b421 HL |
472 | /* |
473 | * Determine the QUIC Transport Parameters and serialize the transport | |
474 | * parameters block. (For servers, we do this later as we must defer | |
475 | * generation until we have received the client's transport parameters.) | |
476 | */ | |
477 | if (!ch->is_server && !ch_generate_transport_params(ch)) | |
478 | goto err; | |
479 | ||
f538b421 HL |
480 | ch_update_idle(ch); |
481 | ossl_quic_reactor_init(&ch->rtor, ch_tick, ch, | |
482 | ch_determine_next_tick_deadline(ch)); | |
483 | return 1; | |
484 | ||
485 | err: | |
486 | ch_cleanup(ch); | |
487 | return 0; | |
488 | } | |
489 | ||
490 | static void ch_cleanup(QUIC_CHANNEL *ch) | |
491 | { | |
cdd91631 | 492 | QUIC_SRT_ELEM *srte, *srte_next; |
f538b421 HL |
493 | uint32_t pn_space; |
494 | ||
495 | if (ch->ackm != NULL) | |
496 | for (pn_space = QUIC_PN_SPACE_INITIAL; | |
497 | pn_space < QUIC_PN_SPACE_NUM; | |
498 | ++pn_space) | |
499 | ossl_ackm_on_pkt_space_discarded(ch->ackm, pn_space); | |
500 | ||
501 | ossl_quic_tx_packetiser_free(ch->txp); | |
502 | ossl_quic_txpim_free(ch->txpim); | |
503 | ossl_quic_cfq_free(ch->cfq); | |
504 | ossl_qtx_free(ch->qtx); | |
505 | if (ch->cc_data != NULL) | |
506 | ch->cc_method->free(ch->cc_data); | |
507 | if (ch->have_statm) | |
508 | ossl_statm_destroy(&ch->statm); | |
509 | ossl_ackm_free(ch->ackm); | |
510 | ||
f538b421 HL |
511 | if (ch->have_qsm) |
512 | ossl_quic_stream_map_cleanup(&ch->qsm); | |
513 | ||
514 | for (pn_space = QUIC_PN_SPACE_INITIAL; pn_space < QUIC_PN_SPACE_NUM; ++pn_space) { | |
515 | ossl_quic_sstream_free(ch->crypto_send[pn_space]); | |
516 | ossl_quic_rstream_free(ch->crypto_recv[pn_space]); | |
517 | } | |
518 | ||
519 | ossl_qrx_pkt_release(ch->qrx_pkt); | |
520 | ch->qrx_pkt = NULL; | |
521 | ||
2723d705 | 522 | ossl_quic_tls_free(ch->qtls); |
f538b421 HL |
523 | ossl_qrx_free(ch->qrx); |
524 | ossl_quic_demux_free(ch->demux); | |
525 | OPENSSL_free(ch->local_transport_params); | |
40c8c756 | 526 | OPENSSL_free((char *)ch->terminate_cause.reason); |
9c3ea4e1 | 527 | OSSL_ERR_STATE_free(ch->err_state); |
8c792b0c | 528 | OPENSSL_free(ch->ack_range_scratch); |
cdd91631 P |
529 | |
530 | /* Free the stateless reset tokens */ | |
531 | for (srte = ossl_list_stateless_reset_tokens_head(&ch->srt_list_seq); | |
532 | srte != NULL; | |
533 | srte = srte_next) { | |
534 | srte_next = ossl_list_stateless_reset_tokens_next(srte); | |
535 | ossl_list_stateless_reset_tokens_remove(&ch->srt_list_seq, srte); | |
536 | (void)lh_QUIC_SRT_ELEM_delete(ch->srt_hash_tok, srte); | |
537 | OPENSSL_free(srte); | |
538 | } | |
539 | lh_QUIC_SRT_ELEM_free(ch->srt_hash_tok); | |
f538b421 HL |
540 | } |
541 | ||
542 | QUIC_CHANNEL *ossl_quic_channel_new(const QUIC_CHANNEL_ARGS *args) | |
543 | { | |
544 | QUIC_CHANNEL *ch = NULL; | |
545 | ||
546 | if ((ch = OPENSSL_zalloc(sizeof(*ch))) == NULL) | |
547 | return NULL; | |
548 | ||
5cf99b40 MC |
549 | ch->libctx = args->libctx; |
550 | ch->propq = args->propq; | |
551 | ch->is_server = args->is_server; | |
552 | ch->tls = args->tls; | |
553 | ch->mutex = args->mutex; | |
554 | ch->now_cb = args->now_cb; | |
555 | ch->now_cb_arg = args->now_cb_arg; | |
f538b421 HL |
556 | |
557 | if (!ch_init(ch)) { | |
558 | OPENSSL_free(ch); | |
559 | return NULL; | |
560 | } | |
561 | ||
562 | return ch; | |
563 | } | |
564 | ||
565 | void ossl_quic_channel_free(QUIC_CHANNEL *ch) | |
566 | { | |
567 | if (ch == NULL) | |
568 | return; | |
569 | ||
570 | ch_cleanup(ch); | |
571 | OPENSSL_free(ch); | |
572 | } | |
573 | ||
14e31409 MC |
574 | /* Set mutator callbacks for test framework support */ |
575 | int ossl_quic_channel_set_mutator(QUIC_CHANNEL *ch, | |
576 | ossl_mutate_packet_cb mutatecb, | |
577 | ossl_finish_mutate_cb finishmutatecb, | |
578 | void *mutatearg) | |
579 | { | |
580 | if (ch->qtx == NULL) | |
581 | return 0; | |
582 | ||
583 | ossl_qtx_set_mutator(ch->qtx, mutatecb, finishmutatecb, mutatearg); | |
584 | return 1; | |
585 | } | |
586 | ||
f538b421 HL |
587 | int ossl_quic_channel_get_peer_addr(QUIC_CHANNEL *ch, BIO_ADDR *peer_addr) |
588 | { | |
617b459d HL |
589 | if (!ch->addressed_mode) |
590 | return 0; | |
591 | ||
f538b421 HL |
592 | *peer_addr = ch->cur_peer_addr; |
593 | return 1; | |
594 | } | |
595 | ||
596 | int ossl_quic_channel_set_peer_addr(QUIC_CHANNEL *ch, const BIO_ADDR *peer_addr) | |
597 | { | |
617b459d HL |
598 | if (ch->state != QUIC_CHANNEL_STATE_IDLE) |
599 | return 0; | |
600 | ||
601 | if (peer_addr == NULL || BIO_ADDR_family(peer_addr) == AF_UNSPEC) { | |
602 | BIO_ADDR_clear(&ch->cur_peer_addr); | |
603 | ch->addressed_mode = 0; | |
604 | return 1; | |
605 | } | |
606 | ||
607 | ch->cur_peer_addr = *peer_addr; | |
608 | ch->addressed_mode = 1; | |
f538b421 HL |
609 | return 1; |
610 | } | |
611 | ||
612 | QUIC_REACTOR *ossl_quic_channel_get_reactor(QUIC_CHANNEL *ch) | |
613 | { | |
614 | return &ch->rtor; | |
615 | } | |
616 | ||
617 | QUIC_STREAM_MAP *ossl_quic_channel_get_qsm(QUIC_CHANNEL *ch) | |
618 | { | |
619 | return &ch->qsm; | |
620 | } | |
621 | ||
622 | OSSL_STATM *ossl_quic_channel_get_statm(QUIC_CHANNEL *ch) | |
623 | { | |
624 | return &ch->statm; | |
625 | } | |
626 | ||
627 | QUIC_STREAM *ossl_quic_channel_get_stream_by_id(QUIC_CHANNEL *ch, | |
628 | uint64_t stream_id) | |
629 | { | |
630 | return ossl_quic_stream_map_get_by_id(&ch->qsm, stream_id); | |
631 | } | |
632 | ||
633 | int ossl_quic_channel_is_active(const QUIC_CHANNEL *ch) | |
634 | { | |
635 | return ch != NULL && ch->state == QUIC_CHANNEL_STATE_ACTIVE; | |
636 | } | |
637 | ||
7757f5ef | 638 | int ossl_quic_channel_is_closing(const QUIC_CHANNEL *ch) |
f538b421 | 639 | { |
afe4a797 P |
640 | return ch->state == QUIC_CHANNEL_STATE_TERMINATING_CLOSING; |
641 | } | |
c12e1113 | 642 | |
afe4a797 P |
643 | static int ossl_quic_channel_is_draining(const QUIC_CHANNEL *ch) |
644 | { | |
645 | return ch->state == QUIC_CHANNEL_STATE_TERMINATING_DRAINING; | |
f538b421 HL |
646 | } |
647 | ||
afe4a797 | 648 | static int ossl_quic_channel_is_terminating(const QUIC_CHANNEL *ch) |
f538b421 | 649 | { |
afe4a797 P |
650 | return ossl_quic_channel_is_closing(ch) |
651 | || ossl_quic_channel_is_draining(ch); | |
652 | } | |
c12e1113 | 653 | |
afe4a797 P |
654 | int ossl_quic_channel_is_terminated(const QUIC_CHANNEL *ch) |
655 | { | |
656 | return ch->state == QUIC_CHANNEL_STATE_TERMINATED; | |
f538b421 HL |
657 | } |
658 | ||
c12e1113 MC |
659 | int ossl_quic_channel_is_term_any(const QUIC_CHANNEL *ch) |
660 | { | |
661 | return ossl_quic_channel_is_terminating(ch) | |
662 | || ossl_quic_channel_is_terminated(ch); | |
663 | } | |
664 | ||
723cbe8a HL |
665 | const QUIC_TERMINATE_CAUSE * |
666 | ossl_quic_channel_get_terminate_cause(const QUIC_CHANNEL *ch) | |
f538b421 | 667 | { |
723cbe8a | 668 | return ossl_quic_channel_is_term_any(ch) ? &ch->terminate_cause : NULL; |
f538b421 HL |
669 | } |
670 | ||
671 | int ossl_quic_channel_is_handshake_complete(const QUIC_CHANNEL *ch) | |
672 | { | |
673 | return ch->handshake_complete; | |
674 | } | |
675 | ||
ce8f20b6 MC |
676 | int ossl_quic_channel_is_handshake_confirmed(const QUIC_CHANNEL *ch) |
677 | { | |
678 | return ch->handshake_confirmed; | |
679 | } | |
680 | ||
553a4e00 HL |
681 | QUIC_DEMUX *ossl_quic_channel_get0_demux(QUIC_CHANNEL *ch) |
682 | { | |
683 | return ch->demux; | |
684 | } | |
685 | ||
fb2245c4 HL |
686 | CRYPTO_MUTEX *ossl_quic_channel_get_mutex(QUIC_CHANNEL *ch) |
687 | { | |
688 | return ch->mutex; | |
689 | } | |
690 | ||
9280d26a HL |
691 | int ossl_quic_channel_has_pending(const QUIC_CHANNEL *ch) |
692 | { | |
693 | return ossl_quic_demux_has_pending(ch->demux) | |
694 | || ossl_qrx_processed_read_pending(ch->qrx); | |
695 | } | |
696 | ||
f538b421 HL |
697 | /* |
698 | * QUIC Channel: Callbacks from Miscellaneous Subsidiary Components | |
699 | * ================================================================ | |
700 | */ | |
701 | ||
702 | /* Used by various components. */ | |
703 | static OSSL_TIME get_time(void *arg) | |
704 | { | |
b212d554 HL |
705 | QUIC_CHANNEL *ch = arg; |
706 | ||
707 | if (ch->now_cb == NULL) | |
708 | return ossl_time_now(); | |
709 | ||
710 | return ch->now_cb(ch->now_cb_arg); | |
f538b421 HL |
711 | } |
712 | ||
713 | /* Used by QSM. */ | |
714 | static uint64_t get_stream_limit(int uni, void *arg) | |
715 | { | |
716 | QUIC_CHANNEL *ch = arg; | |
717 | ||
718 | return uni ? ch->max_local_streams_uni : ch->max_local_streams_bidi; | |
719 | } | |
720 | ||
721 | /* | |
722 | * Called by QRX to determine if a packet is potentially invalid before trying | |
723 | * to decrypt it. | |
724 | */ | |
dfe5e7fa | 725 | static int rx_late_validate(QUIC_PN pn, int pn_space, void *arg) |
f538b421 HL |
726 | { |
727 | QUIC_CHANNEL *ch = arg; | |
728 | ||
729 | /* Potential duplicates should not be processed. */ | |
730 | if (!ossl_ackm_is_rx_pn_processable(ch->ackm, pn, pn_space)) | |
731 | return 0; | |
732 | ||
733 | return 1; | |
734 | } | |
735 | ||
8a65e7a5 HL |
736 | /* |
737 | * Triggers a TXKU (whether spontaneous or solicited). Does not check whether | |
738 | * spontaneous TXKU is currently allowed. | |
739 | */ | |
740 | QUIC_NEEDS_LOCK | |
741 | static void ch_trigger_txku(QUIC_CHANNEL *ch) | |
742 | { | |
743 | uint64_t next_pn | |
744 | = ossl_quic_tx_packetiser_get_next_pn(ch->txp, QUIC_PN_SPACE_APP); | |
745 | ||
746 | if (!ossl_quic_pn_valid(next_pn) | |
747 | || !ossl_qtx_trigger_key_update(ch->qtx)) { | |
748 | ossl_quic_channel_raise_protocol_error(ch, QUIC_ERR_INTERNAL_ERROR, 0, | |
749 | "key update"); | |
750 | return; | |
751 | } | |
752 | ||
753 | ch->txku_in_progress = 1; | |
754 | ch->txku_pn = next_pn; | |
755 | ch->rxku_expected = ch->ku_locally_initiated; | |
756 | } | |
757 | ||
758 | QUIC_NEEDS_LOCK | |
759 | static int txku_in_progress(QUIC_CHANNEL *ch) | |
760 | { | |
761 | if (ch->txku_in_progress | |
762 | && ossl_ackm_get_largest_acked(ch->ackm, QUIC_PN_SPACE_APP) >= ch->txku_pn) { | |
763 | OSSL_TIME pto = ossl_ackm_get_pto_duration(ch->ackm); | |
764 | ||
765 | /* | |
766 | * RFC 9001 s. 6.5: Endpoints SHOULD wait three times the PTO before | |
767 | * initiating a key update after receiving an acknowledgment that | |
768 | * confirms that the previous key update was received. | |
769 | * | |
770 | * Note that by the above wording, this period starts from when we get | |
771 | * the ack for a TXKU-triggering packet, not when the TXKU is initiated. | |
772 | * So we defer TXKU cooldown deadline calculation to this point. | |
773 | */ | |
774 | ch->txku_in_progress = 0; | |
775 | ch->txku_cooldown_deadline = ossl_time_add(get_time(ch), | |
776 | ossl_time_multiply(pto, 3)); | |
777 | } | |
778 | ||
779 | return ch->txku_in_progress; | |
780 | } | |
781 | ||
782 | QUIC_NEEDS_LOCK | |
783 | static int txku_allowed(QUIC_CHANNEL *ch) | |
784 | { | |
785 | return ch->tx_enc_level == QUIC_ENC_LEVEL_1RTT /* Sanity check. */ | |
786 | /* Strict RFC 9001 criterion for TXKU. */ | |
787 | && ch->handshake_confirmed | |
788 | && !txku_in_progress(ch); | |
789 | } | |
790 | ||
791 | QUIC_NEEDS_LOCK | |
792 | static int txku_recommendable(QUIC_CHANNEL *ch) | |
793 | { | |
794 | if (!txku_allowed(ch)) | |
795 | return 0; | |
796 | ||
797 | return | |
798 | /* Recommended RFC 9001 criterion for TXKU. */ | |
799 | ossl_time_compare(get_time(ch), ch->txku_cooldown_deadline) >= 0 | |
800 | /* Some additional sensible criteria. */ | |
801 | && !ch->rxku_in_progress | |
802 | && !ch->rxku_pending_confirm; | |
803 | } | |
804 | ||
805 | QUIC_NEEDS_LOCK | |
806 | static int txku_desirable(QUIC_CHANNEL *ch) | |
807 | { | |
16f3b542 | 808 | uint64_t cur_pkt_count, max_pkt_count, thresh_pkt_count; |
8a65e7a5 HL |
809 | const uint32_t enc_level = QUIC_ENC_LEVEL_1RTT; |
810 | ||
811 | /* Check AEAD limit to determine if we should perform a spontaneous TXKU. */ | |
812 | cur_pkt_count = ossl_qtx_get_cur_epoch_pkt_count(ch->qtx, enc_level); | |
813 | max_pkt_count = ossl_qtx_get_max_epoch_pkt_count(ch->qtx, enc_level); | |
814 | ||
16f3b542 HL |
815 | thresh_pkt_count = max_pkt_count / 2; |
816 | if (ch->txku_threshold_override != UINT64_MAX) | |
817 | thresh_pkt_count = ch->txku_threshold_override; | |
818 | ||
819 | return cur_pkt_count >= thresh_pkt_count; | |
8a65e7a5 HL |
820 | } |
821 | ||
822 | QUIC_NEEDS_LOCK | |
823 | static void ch_maybe_trigger_spontaneous_txku(QUIC_CHANNEL *ch) | |
824 | { | |
825 | if (!txku_recommendable(ch) || !txku_desirable(ch)) | |
826 | return; | |
827 | ||
828 | ch->ku_locally_initiated = 1; | |
829 | ch_trigger_txku(ch); | |
830 | } | |
831 | ||
832 | QUIC_NEEDS_LOCK | |
833 | static int rxku_allowed(QUIC_CHANNEL *ch) | |
834 | { | |
835 | /* | |
836 | * RFC 9001 s. 6.1: An endpoint MUST NOT initiate a key update prior to | |
837 | * having confirmed the handshake (Section 4.1.2). | |
838 | * | |
839 | * RFC 9001 s. 6.1: An endpoint MUST NOT initiate a subsequent key update | |
840 | * unless it has received an acknowledgment for a packet that was sent | |
841 | * protected with keys from the current key phase. | |
842 | * | |
843 | * RFC 9001 s. 6.2: If an endpoint detects a second update before it has | |
844 | * sent any packets with updated keys containing an acknowledgment for the | |
845 | * packet that initiated the key update, it indicates that its peer has | |
846 | * updated keys twice without awaiting confirmation. An endpoint MAY treat | |
847 | * such consecutive key updates as a connection error of type | |
848 | * KEY_UPDATE_ERROR. | |
849 | */ | |
850 | return ch->handshake_confirmed && !ch->rxku_pending_confirm; | |
851 | } | |
852 | ||
853 | /* | |
854 | * Called when the QRX detects a new RX key update event. | |
855 | */ | |
856 | enum rxku_decision { | |
857 | DECISION_RXKU_ONLY, | |
858 | DECISION_PROTOCOL_VIOLATION, | |
859 | DECISION_SOLICITED_TXKU | |
860 | }; | |
861 | ||
862 | /* Called when the QRX detects a key update has occurred. */ | |
863 | QUIC_NEEDS_LOCK | |
864 | static void rxku_detected(QUIC_PN pn, void *arg) | |
865 | { | |
866 | QUIC_CHANNEL *ch = arg; | |
867 | enum rxku_decision decision; | |
868 | OSSL_TIME pto; | |
869 | ||
870 | /* | |
871 | * Note: rxku_in_progress is always 0 here as an RXKU cannot be detected | |
872 | * when we are still in UPDATING or COOLDOWN (see quic_record_rx.h). | |
873 | */ | |
874 | assert(!ch->rxku_in_progress); | |
875 | ||
876 | if (!rxku_allowed(ch)) | |
877 | /* Is RXKU even allowed at this time? */ | |
878 | decision = DECISION_PROTOCOL_VIOLATION; | |
879 | ||
880 | else if (ch->ku_locally_initiated) | |
881 | /* | |
882 | * If this key update was locally initiated (meaning that this detected | |
883 | * RXKU event is a result of our own spontaneous TXKU), we do not | |
884 | * trigger another TXKU; after all, to do so would result in an infinite | |
885 | * ping-pong of key updates. We still process it as an RXKU. | |
886 | */ | |
887 | decision = DECISION_RXKU_ONLY; | |
888 | ||
889 | else | |
890 | /* | |
891 | * Otherwise, a peer triggering a KU means we have to trigger a KU also. | |
892 | */ | |
893 | decision = DECISION_SOLICITED_TXKU; | |
894 | ||
895 | if (decision == DECISION_PROTOCOL_VIOLATION) { | |
896 | ossl_quic_channel_raise_protocol_error(ch, QUIC_ERR_KEY_UPDATE_ERROR, | |
897 | 0, "RX key update again too soon"); | |
898 | return; | |
899 | } | |
900 | ||
901 | pto = ossl_ackm_get_pto_duration(ch->ackm); | |
902 | ||
903 | ch->ku_locally_initiated = 0; | |
904 | ch->rxku_in_progress = 1; | |
905 | ch->rxku_pending_confirm = 1; | |
906 | ch->rxku_trigger_pn = pn; | |
907 | ch->rxku_update_end_deadline = ossl_time_add(get_time(ch), pto); | |
c93f7668 | 908 | ch->rxku_expected = 0; |
8a65e7a5 HL |
909 | |
910 | if (decision == DECISION_SOLICITED_TXKU) | |
911 | /* NOT gated by usual txku_allowed() */ | |
912 | ch_trigger_txku(ch); | |
37ba2bc7 HL |
913 | |
914 | /* | |
915 | * Ordinarily, we only generate ACK when some ACK-eliciting frame has been | |
916 | * received. In some cases, this may not occur for a long time, for example | |
917 | * if transmission of application data is going in only one direction and | |
918 | * nothing else is happening with the connection. However, since the peer | |
919 | * cannot initiate a subsequent (spontaneous) TXKU until its prior | |
692a3cab | 920 | * (spontaneous or solicited) TXKU has completed - meaning that prior |
37ba2bc7 HL |
921 | * TXKU's trigger packet (or subsequent packet) has been acknowledged, this |
922 | * can lead to very long times before a TXKU is considered 'completed'. | |
923 | * Optimise this by forcing ACK generation after triggering TXKU. | |
924 | * (Basically, we consider a RXKU event something that is 'ACK-eliciting', | |
925 | * which it more or less should be; it is necessarily separate from ordinary | |
926 | * processing of ACK-eliciting frames as key update is not indicated via a | |
927 | * frame.) | |
928 | */ | |
929 | ossl_quic_tx_packetiser_schedule_ack(ch->txp, QUIC_PN_SPACE_APP); | |
8a65e7a5 HL |
930 | } |
931 | ||
932 | /* Called per tick to handle RXKU timer events. */ | |
933 | QUIC_NEEDS_LOCK | |
934 | static void ch_rxku_tick(QUIC_CHANNEL *ch) | |
935 | { | |
936 | if (!ch->rxku_in_progress | |
937 | || ossl_time_compare(get_time(ch), ch->rxku_update_end_deadline) < 0) | |
938 | return; | |
939 | ||
940 | ch->rxku_update_end_deadline = ossl_time_infinite(); | |
941 | ch->rxku_in_progress = 0; | |
942 | ||
943 | if (!ossl_qrx_key_update_timeout(ch->qrx, /*normal=*/1)) | |
944 | ossl_quic_channel_raise_protocol_error(ch, QUIC_ERR_INTERNAL_ERROR, 0, | |
945 | "RXKU cooldown internal error"); | |
946 | } | |
947 | ||
948 | QUIC_NEEDS_LOCK | |
949 | static void ch_on_txp_ack_tx(const OSSL_QUIC_FRAME_ACK *ack, uint32_t pn_space, | |
950 | void *arg) | |
951 | { | |
952 | QUIC_CHANNEL *ch = arg; | |
953 | ||
954 | if (pn_space != QUIC_PN_SPACE_APP || !ch->rxku_pending_confirm | |
955 | || !ossl_quic_frame_ack_contains_pn(ack, ch->rxku_trigger_pn)) | |
956 | return; | |
957 | ||
958 | /* | |
959 | * Defer clearing rxku_pending_confirm until TXP generate call returns | |
960 | * successfully. | |
961 | */ | |
962 | ch->rxku_pending_confirm_done = 1; | |
963 | } | |
964 | ||
f538b421 HL |
965 | /* |
966 | * QUIC Channel: Handshake Layer Event Handling | |
967 | * ============================================ | |
968 | */ | |
969 | static int ch_on_crypto_send(const unsigned char *buf, size_t buf_len, | |
970 | size_t *consumed, void *arg) | |
971 | { | |
972 | int ret; | |
973 | QUIC_CHANNEL *ch = arg; | |
974 | uint32_t enc_level = ch->tx_enc_level; | |
975 | uint32_t pn_space = ossl_quic_enc_level_to_pn_space(enc_level); | |
976 | QUIC_SSTREAM *sstream = ch->crypto_send[pn_space]; | |
977 | ||
978 | if (!ossl_assert(sstream != NULL)) | |
979 | return 0; | |
980 | ||
981 | ret = ossl_quic_sstream_append(sstream, buf, buf_len, consumed); | |
982 | return ret; | |
983 | } | |
984 | ||
985 | static int crypto_ensure_empty(QUIC_RSTREAM *rstream) | |
986 | { | |
987 | size_t avail = 0; | |
988 | int is_fin = 0; | |
989 | ||
990 | if (rstream == NULL) | |
991 | return 1; | |
992 | ||
993 | if (!ossl_quic_rstream_available(rstream, &avail, &is_fin)) | |
994 | return 0; | |
995 | ||
996 | return avail == 0; | |
997 | } | |
998 | ||
7257188b MC |
999 | static int ch_on_crypto_recv_record(const unsigned char **buf, |
1000 | size_t *bytes_read, void *arg) | |
f538b421 HL |
1001 | { |
1002 | QUIC_CHANNEL *ch = arg; | |
1003 | QUIC_RSTREAM *rstream; | |
1004 | int is_fin = 0; /* crypto stream is never finished, so we don't use this */ | |
1005 | uint32_t i; | |
1006 | ||
1007 | /* | |
1008 | * After we move to a later EL we must not allow our peer to send any new | |
1009 | * bytes in the crypto stream on a previous EL. Retransmissions of old bytes | |
1010 | * are allowed. | |
1011 | * | |
1012 | * In practice we will only move to a new EL when we have consumed all bytes | |
1013 | * which should be sent on the crypto stream at a previous EL. For example, | |
1014 | * the Handshake EL should not be provisioned until we have completely | |
1015 | * consumed a TLS 1.3 ServerHello. Thus when we provision an EL the output | |
1016 | * of ossl_quic_rstream_available() should be 0 for all lower ELs. Thus if a | |
1017 | * given EL is available we simply ensure we have not received any further | |
1018 | * bytes at a lower EL. | |
1019 | */ | |
45ecfc9b | 1020 | for (i = QUIC_ENC_LEVEL_INITIAL; i < ch->rx_enc_level; ++i) |
f538b421 HL |
1021 | if (i != QUIC_ENC_LEVEL_0RTT && |
1022 | !crypto_ensure_empty(ch->crypto_recv[ossl_quic_enc_level_to_pn_space(i)])) { | |
1023 | /* Protocol violation (RFC 9001 s. 4.1.3) */ | |
1024 | ossl_quic_channel_raise_protocol_error(ch, QUIC_ERR_PROTOCOL_VIOLATION, | |
1025 | OSSL_QUIC_FRAME_TYPE_CRYPTO, | |
1026 | "crypto stream data in wrong EL"); | |
1027 | return 0; | |
1028 | } | |
1029 | ||
45ecfc9b | 1030 | rstream = ch->crypto_recv[ossl_quic_enc_level_to_pn_space(ch->rx_enc_level)]; |
f538b421 HL |
1031 | if (rstream == NULL) |
1032 | return 0; | |
1033 | ||
7257188b MC |
1034 | return ossl_quic_rstream_get_record(rstream, buf, bytes_read, |
1035 | &is_fin); | |
1036 | } | |
1037 | ||
1038 | static int ch_on_crypto_release_record(size_t bytes_read, void *arg) | |
1039 | { | |
1040 | QUIC_CHANNEL *ch = arg; | |
1041 | QUIC_RSTREAM *rstream; | |
098914d0 HL |
1042 | OSSL_RTT_INFO rtt_info; |
1043 | uint32_t rx_pn_space = ossl_quic_enc_level_to_pn_space(ch->rx_enc_level); | |
7257188b | 1044 | |
098914d0 | 1045 | rstream = ch->crypto_recv[rx_pn_space]; |
7257188b MC |
1046 | if (rstream == NULL) |
1047 | return 0; | |
1048 | ||
098914d0 HL |
1049 | ossl_statm_get_rtt_info(ossl_quic_channel_get_statm(ch), &rtt_info); |
1050 | if (!ossl_quic_rxfc_on_retire(&ch->crypto_rxfc[rx_pn_space], bytes_read, | |
1051 | rtt_info.smoothed_rtt)) | |
1052 | return 0; | |
1053 | ||
7257188b | 1054 | return ossl_quic_rstream_release_record(rstream, bytes_read); |
f538b421 HL |
1055 | } |
1056 | ||
1057 | static int ch_on_handshake_yield_secret(uint32_t enc_level, int direction, | |
1058 | uint32_t suite_id, EVP_MD *md, | |
1059 | const unsigned char *secret, | |
1060 | size_t secret_len, | |
1061 | void *arg) | |
1062 | { | |
1063 | QUIC_CHANNEL *ch = arg; | |
1064 | uint32_t i; | |
1065 | ||
1066 | if (enc_level < QUIC_ENC_LEVEL_HANDSHAKE || enc_level >= QUIC_ENC_LEVEL_NUM) | |
1067 | /* Invalid EL. */ | |
1068 | return 0; | |
1069 | ||
f538b421 HL |
1070 | |
1071 | if (direction) { | |
1072 | /* TX */ | |
45ecfc9b MC |
1073 | if (enc_level <= ch->tx_enc_level) |
1074 | /* | |
9f0ade7c HL |
1075 | * Does not make sense for us to try and provision an EL we have already |
1076 | * attained. | |
1077 | */ | |
45ecfc9b MC |
1078 | return 0; |
1079 | ||
f538b421 HL |
1080 | if (!ossl_qtx_provide_secret(ch->qtx, enc_level, |
1081 | suite_id, md, | |
1082 | secret, secret_len)) | |
1083 | return 0; | |
1084 | ||
1085 | ch->tx_enc_level = enc_level; | |
1086 | } else { | |
1087 | /* RX */ | |
45ecfc9b MC |
1088 | if (enc_level <= ch->rx_enc_level) |
1089 | /* | |
9f0ade7c HL |
1090 | * Does not make sense for us to try and provision an EL we have already |
1091 | * attained. | |
1092 | */ | |
45ecfc9b MC |
1093 | return 0; |
1094 | ||
1095 | /* | |
9f0ade7c HL |
1096 | * Ensure all crypto streams for previous ELs are now empty of available |
1097 | * data. | |
1098 | */ | |
45ecfc9b | 1099 | for (i = QUIC_ENC_LEVEL_INITIAL; i < enc_level; ++i) |
e28f512f | 1100 | if (!crypto_ensure_empty(ch->crypto_recv[ossl_quic_enc_level_to_pn_space(i)])) { |
45ecfc9b MC |
1101 | /* Protocol violation (RFC 9001 s. 4.1.3) */ |
1102 | ossl_quic_channel_raise_protocol_error(ch, QUIC_ERR_PROTOCOL_VIOLATION, | |
1103 | OSSL_QUIC_FRAME_TYPE_CRYPTO, | |
1104 | "crypto stream data in wrong EL"); | |
1105 | return 0; | |
1106 | } | |
1107 | ||
f538b421 HL |
1108 | if (!ossl_qrx_provide_secret(ch->qrx, enc_level, |
1109 | suite_id, md, | |
1110 | secret, secret_len)) | |
1111 | return 0; | |
92282a17 HL |
1112 | |
1113 | ch->have_new_rx_secret = 1; | |
45ecfc9b | 1114 | ch->rx_enc_level = enc_level; |
f538b421 HL |
1115 | } |
1116 | ||
1117 | return 1; | |
1118 | } | |
1119 | ||
1120 | static int ch_on_handshake_complete(void *arg) | |
1121 | { | |
1122 | QUIC_CHANNEL *ch = arg; | |
1123 | ||
e28f512f | 1124 | if (!ossl_assert(!ch->handshake_complete)) |
f538b421 HL |
1125 | return 0; /* this should not happen twice */ |
1126 | ||
1127 | if (!ossl_assert(ch->tx_enc_level == QUIC_ENC_LEVEL_1RTT)) | |
1128 | return 0; | |
1129 | ||
62d0da12 | 1130 | if (!ch->got_remote_transport_params) { |
f538b421 HL |
1131 | /* |
1132 | * Was not a valid QUIC handshake if we did not get valid transport | |
1133 | * params. | |
1134 | */ | |
3ad5711e | 1135 | ossl_quic_channel_raise_protocol_error(ch, QUIC_ERR_CRYPTO_MISSING_EXT, |
62d0da12 MC |
1136 | OSSL_QUIC_FRAME_TYPE_CRYPTO, |
1137 | "no transport parameters received"); | |
f538b421 | 1138 | return 0; |
62d0da12 | 1139 | } |
f538b421 HL |
1140 | |
1141 | /* Don't need transport parameters anymore. */ | |
1142 | OPENSSL_free(ch->local_transport_params); | |
1143 | ch->local_transport_params = NULL; | |
1144 | ||
2a6f1f2f HL |
1145 | /* Tell the QRX it can now process 1-RTT packets. */ |
1146 | ossl_qrx_allow_1rtt_processing(ch->qrx); | |
1147 | ||
f538b421 HL |
1148 | /* Tell TXP the handshake is complete. */ |
1149 | ossl_quic_tx_packetiser_notify_handshake_complete(ch->txp); | |
1150 | ||
1151 | ch->handshake_complete = 1; | |
b1b06da2 HL |
1152 | |
1153 | if (ch->is_server) { | |
1154 | /* | |
1155 | * On the server, the handshake is confirmed as soon as it is complete. | |
1156 | */ | |
1157 | ossl_quic_channel_on_handshake_confirmed(ch); | |
1158 | ||
1159 | ossl_quic_tx_packetiser_schedule_handshake_done(ch->txp); | |
1160 | } | |
1161 | ||
f538b421 HL |
1162 | return 1; |
1163 | } | |
1164 | ||
1165 | static int ch_on_handshake_alert(void *arg, unsigned char alert_code) | |
1166 | { | |
1167 | QUIC_CHANNEL *ch = arg; | |
1168 | ||
b644a932 MC |
1169 | /* |
1170 | * RFC 9001 s. 4.4: More specifically, servers MUST NOT send post-handshake | |
1171 | * TLS CertificateRequest messages, and clients MUST treat receipt of such | |
1172 | * messages as a connection error of type PROTOCOL_VIOLATION. | |
1173 | */ | |
04c7fb53 | 1174 | if (alert_code == SSL_AD_UNEXPECTED_MESSAGE |
b644a932 MC |
1175 | && ch->handshake_complete |
1176 | && ossl_quic_tls_is_cert_request(ch->qtls)) | |
1177 | ossl_quic_channel_raise_protocol_error(ch, | |
1178 | QUIC_ERR_PROTOCOL_VIOLATION, | |
1179 | 0, | |
1180 | "Post-handshake TLS " | |
1181 | "CertificateRequest received"); | |
04c7fb53 MC |
1182 | /* |
1183 | * RFC 9001 s. 4.6.1: Servers MUST NOT send the early_data extension with a | |
1184 | * max_early_data_size field set to any value other than 0xffffffff. A | |
1185 | * client MUST treat receipt of a NewSessionTicket that contains an | |
1186 | * early_data extension with any other value as a connection error of type | |
1187 | * PROTOCOL_VIOLATION. | |
1188 | */ | |
1189 | else if (alert_code == SSL_AD_ILLEGAL_PARAMETER | |
1190 | && ch->handshake_complete | |
1191 | && ossl_quic_tls_has_bad_max_early_data(ch->qtls)) | |
1192 | ossl_quic_channel_raise_protocol_error(ch, | |
1193 | QUIC_ERR_PROTOCOL_VIOLATION, | |
1194 | 0, | |
1195 | "Bad max_early_data received"); | |
b644a932 MC |
1196 | else |
1197 | ossl_quic_channel_raise_protocol_error(ch, | |
1198 | QUIC_ERR_CRYPTO_ERR_BEGIN | |
1199 | + alert_code, | |
1200 | 0, "handshake alert"); | |
1201 | ||
f538b421 HL |
1202 | return 1; |
1203 | } | |
1204 | ||
1205 | /* | |
1206 | * QUIC Channel: Transport Parameter Handling | |
1207 | * ========================================== | |
1208 | */ | |
1209 | ||
1210 | /* | |
1211 | * Called by handshake layer when we receive QUIC Transport Parameters from the | |
1212 | * peer. Note that these are not authenticated until the handshake is marked | |
1213 | * as complete. | |
1214 | */ | |
3c567a52 HL |
1215 | #define TP_REASON_SERVER_ONLY(x) \ |
1216 | x " may not be sent by a client" | |
1217 | #define TP_REASON_DUP(x) \ | |
1218 | x " appears multiple times" | |
1219 | #define TP_REASON_MALFORMED(x) \ | |
1220 | x " is malformed" | |
1221 | #define TP_REASON_EXPECTED_VALUE(x) \ | |
1222 | x " does not match expected value" | |
1223 | #define TP_REASON_NOT_RETRY(x) \ | |
1224 | x " sent when not performing a retry" | |
1225 | #define TP_REASON_REQUIRED(x) \ | |
1226 | x " was not sent but is required" | |
cdd91631 P |
1227 | #define TP_REASON_INTERNAL_ERROR(x) \ |
1228 | x " encountered internal error" | |
3c567a52 | 1229 | |
26ad16ea HL |
1230 | static void txfc_bump_cwm_bidi(QUIC_STREAM *s, void *arg) |
1231 | { | |
1232 | if (!ossl_quic_stream_is_bidi(s) | |
1233 | || ossl_quic_stream_is_server_init(s)) | |
1234 | return; | |
1235 | ||
1236 | ossl_quic_txfc_bump_cwm(&s->txfc, *(uint64_t *)arg); | |
1237 | } | |
1238 | ||
1239 | static void txfc_bump_cwm_uni(QUIC_STREAM *s, void *arg) | |
1240 | { | |
1241 | if (ossl_quic_stream_is_bidi(s) | |
1242 | || ossl_quic_stream_is_server_init(s)) | |
1243 | return; | |
1244 | ||
1245 | ossl_quic_txfc_bump_cwm(&s->txfc, *(uint64_t *)arg); | |
1246 | } | |
1247 | ||
1248 | static void do_update(QUIC_STREAM *s, void *arg) | |
1249 | { | |
1250 | QUIC_CHANNEL *ch = arg; | |
1251 | ||
1252 | ossl_quic_stream_map_update_state(&ch->qsm, s); | |
1253 | } | |
1254 | ||
f538b421 HL |
1255 | static int ch_on_transport_params(const unsigned char *params, |
1256 | size_t params_len, | |
1257 | void *arg) | |
1258 | { | |
1259 | QUIC_CHANNEL *ch = arg; | |
1260 | PACKET pkt; | |
1261 | uint64_t id, v; | |
1262 | size_t len; | |
1263 | const unsigned char *body; | |
1264 | int got_orig_dcid = 0; | |
1265 | int got_initial_scid = 0; | |
1266 | int got_retry_scid = 0; | |
1267 | int got_initial_max_data = 0; | |
1268 | int got_initial_max_stream_data_bidi_local = 0; | |
1269 | int got_initial_max_stream_data_bidi_remote = 0; | |
1270 | int got_initial_max_stream_data_uni = 0; | |
1271 | int got_initial_max_streams_bidi = 0; | |
1272 | int got_initial_max_streams_uni = 0; | |
70e809b0 HL |
1273 | int got_stateless_reset_token = 0; |
1274 | int got_preferred_addr = 0; | |
f538b421 HL |
1275 | int got_ack_delay_exp = 0; |
1276 | int got_max_ack_delay = 0; | |
1277 | int got_max_udp_payload_size = 0; | |
1278 | int got_max_idle_timeout = 0; | |
1279 | int got_active_conn_id_limit = 0; | |
0911cb4a | 1280 | int got_disable_active_migration = 0; |
f538b421 | 1281 | QUIC_CONN_ID cid; |
3c567a52 | 1282 | const char *reason = "bad transport parameter"; |
f538b421 HL |
1283 | |
1284 | if (ch->got_remote_transport_params) | |
1285 | goto malformed; | |
1286 | ||
96014840 TM |
1287 | if (!PACKET_buf_init(&pkt, params, params_len)) { |
1288 | ossl_quic_channel_raise_protocol_error(ch, QUIC_ERR_INTERNAL_ERROR, 0, | |
1289 | "internal error (packet buf init)"); | |
f538b421 | 1290 | return 0; |
96014840 | 1291 | } |
f538b421 HL |
1292 | |
1293 | while (PACKET_remaining(&pkt) > 0) { | |
1294 | if (!ossl_quic_wire_peek_transport_param(&pkt, &id)) | |
1295 | goto malformed; | |
1296 | ||
1297 | switch (id) { | |
75b2920a | 1298 | case QUIC_TPARAM_ORIG_DCID: |
3c567a52 HL |
1299 | if (got_orig_dcid) { |
1300 | reason = TP_REASON_DUP("ORIG_DCID"); | |
1301 | goto malformed; | |
1302 | } | |
1303 | ||
1304 | if (ch->is_server) { | |
1305 | reason = TP_REASON_SERVER_ONLY("ORIG_DCID"); | |
75b2920a | 1306 | goto malformed; |
3c567a52 | 1307 | } |
75b2920a | 1308 | |
3c567a52 HL |
1309 | if (!ossl_quic_wire_decode_transport_param_cid(&pkt, NULL, &cid)) { |
1310 | reason = TP_REASON_MALFORMED("ORIG_DCID"); | |
75b2920a | 1311 | goto malformed; |
3c567a52 | 1312 | } |
75b2920a HL |
1313 | |
1314 | /* Must match our initial DCID. */ | |
3c567a52 HL |
1315 | if (!ossl_quic_conn_id_eq(&ch->init_dcid, &cid)) { |
1316 | reason = TP_REASON_EXPECTED_VALUE("ORIG_DCID"); | |
75b2920a | 1317 | goto malformed; |
3c567a52 | 1318 | } |
75b2920a HL |
1319 | |
1320 | got_orig_dcid = 1; | |
1321 | break; | |
1322 | ||
1323 | case QUIC_TPARAM_RETRY_SCID: | |
3c567a52 HL |
1324 | if (ch->is_server) { |
1325 | reason = TP_REASON_SERVER_ONLY("RETRY_SCID"); | |
1326 | goto malformed; | |
1327 | } | |
1328 | ||
1329 | if (got_retry_scid) { | |
1330 | reason = TP_REASON_DUP("RETRY_SCID"); | |
75b2920a | 1331 | goto malformed; |
3c567a52 HL |
1332 | } |
1333 | ||
1334 | if (!ch->doing_retry) { | |
1335 | reason = TP_REASON_NOT_RETRY("RETRY_SCID"); | |
1336 | goto malformed; | |
1337 | } | |
75b2920a | 1338 | |
3c567a52 HL |
1339 | if (!ossl_quic_wire_decode_transport_param_cid(&pkt, NULL, &cid)) { |
1340 | reason = TP_REASON_MALFORMED("RETRY_SCID"); | |
75b2920a | 1341 | goto malformed; |
3c567a52 | 1342 | } |
75b2920a HL |
1343 | |
1344 | /* Must match Retry packet SCID. */ | |
3c567a52 HL |
1345 | if (!ossl_quic_conn_id_eq(&ch->retry_scid, &cid)) { |
1346 | reason = TP_REASON_EXPECTED_VALUE("RETRY_SCID"); | |
75b2920a | 1347 | goto malformed; |
3c567a52 | 1348 | } |
75b2920a HL |
1349 | |
1350 | got_retry_scid = 1; | |
1351 | break; | |
1352 | ||
1353 | case QUIC_TPARAM_INITIAL_SCID: | |
3c567a52 | 1354 | if (got_initial_scid) { |
75b2920a | 1355 | /* must not appear more than once */ |
3c567a52 | 1356 | reason = TP_REASON_DUP("INITIAL_SCID"); |
75b2920a | 1357 | goto malformed; |
3c567a52 | 1358 | } |
75b2920a | 1359 | |
3c567a52 HL |
1360 | if (!ossl_quic_wire_decode_transport_param_cid(&pkt, NULL, &cid)) { |
1361 | reason = TP_REASON_MALFORMED("INITIAL_SCID"); | |
75b2920a | 1362 | goto malformed; |
3c567a52 | 1363 | } |
75b2920a HL |
1364 | |
1365 | /* Must match SCID of first Initial packet from server. */ | |
3c567a52 HL |
1366 | if (!ossl_quic_conn_id_eq(&ch->init_scid, &cid)) { |
1367 | reason = TP_REASON_EXPECTED_VALUE("INITIAL_SCID"); | |
75b2920a | 1368 | goto malformed; |
3c567a52 | 1369 | } |
75b2920a HL |
1370 | |
1371 | got_initial_scid = 1; | |
1372 | break; | |
1373 | ||
1374 | case QUIC_TPARAM_INITIAL_MAX_DATA: | |
3c567a52 | 1375 | if (got_initial_max_data) { |
75b2920a | 1376 | /* must not appear more than once */ |
3c567a52 | 1377 | reason = TP_REASON_DUP("INITIAL_MAX_DATA"); |
75b2920a | 1378 | goto malformed; |
3c567a52 | 1379 | } |
75b2920a | 1380 | |
3c567a52 HL |
1381 | if (!ossl_quic_wire_decode_transport_param_int(&pkt, &id, &v)) { |
1382 | reason = TP_REASON_MALFORMED("INITIAL_MAX_DATA"); | |
75b2920a | 1383 | goto malformed; |
3c567a52 | 1384 | } |
75b2920a HL |
1385 | |
1386 | ossl_quic_txfc_bump_cwm(&ch->conn_txfc, v); | |
1387 | got_initial_max_data = 1; | |
1388 | break; | |
1389 | ||
1390 | case QUIC_TPARAM_INITIAL_MAX_STREAM_DATA_BIDI_LOCAL: | |
3c567a52 | 1391 | if (got_initial_max_stream_data_bidi_local) { |
75b2920a | 1392 | /* must not appear more than once */ |
3c567a52 | 1393 | reason = TP_REASON_DUP("INITIAL_MAX_STREAM_DATA_BIDI_LOCAL"); |
75b2920a | 1394 | goto malformed; |
3c567a52 | 1395 | } |
75b2920a | 1396 | |
3c567a52 HL |
1397 | if (!ossl_quic_wire_decode_transport_param_int(&pkt, &id, &v)) { |
1398 | reason = TP_REASON_MALFORMED("INITIAL_MAX_STREAM_DATA_BIDI_LOCAL"); | |
75b2920a | 1399 | goto malformed; |
3c567a52 | 1400 | } |
f538b421 HL |
1401 | |
1402 | /* | |
75b2920a HL |
1403 | * This is correct; the BIDI_LOCAL TP governs streams created by |
1404 | * the endpoint which sends the TP, i.e., our peer. | |
f538b421 | 1405 | */ |
54562e89 | 1406 | ch->rx_init_max_stream_data_bidi_remote = v; |
75b2920a HL |
1407 | got_initial_max_stream_data_bidi_local = 1; |
1408 | break; | |
1409 | ||
1410 | case QUIC_TPARAM_INITIAL_MAX_STREAM_DATA_BIDI_REMOTE: | |
3c567a52 | 1411 | if (got_initial_max_stream_data_bidi_remote) { |
75b2920a | 1412 | /* must not appear more than once */ |
3c567a52 | 1413 | reason = TP_REASON_DUP("INITIAL_MAX_STREAM_DATA_BIDI_REMOTE"); |
75b2920a | 1414 | goto malformed; |
3c567a52 | 1415 | } |
75b2920a | 1416 | |
3c567a52 HL |
1417 | if (!ossl_quic_wire_decode_transport_param_int(&pkt, &id, &v)) { |
1418 | reason = TP_REASON_MALFORMED("INITIAL_MAX_STREAM_DATA_BIDI_REMOTE"); | |
75b2920a | 1419 | goto malformed; |
3c567a52 | 1420 | } |
75b2920a HL |
1421 | |
1422 | /* | |
1423 | * This is correct; the BIDI_REMOTE TP governs streams created | |
1424 | * by the endpoint which receives the TP, i.e., us. | |
1425 | */ | |
54562e89 | 1426 | ch->rx_init_max_stream_data_bidi_local = v; |
75b2920a | 1427 | |
26ad16ea HL |
1428 | /* Apply to all existing streams. */ |
1429 | ossl_quic_stream_map_visit(&ch->qsm, txfc_bump_cwm_bidi, &v); | |
75b2920a HL |
1430 | got_initial_max_stream_data_bidi_remote = 1; |
1431 | break; | |
1432 | ||
1433 | case QUIC_TPARAM_INITIAL_MAX_STREAM_DATA_UNI: | |
3c567a52 | 1434 | if (got_initial_max_stream_data_uni) { |
75b2920a | 1435 | /* must not appear more than once */ |
3c567a52 | 1436 | reason = TP_REASON_DUP("INITIAL_MAX_STREAM_DATA_UNI"); |
75b2920a | 1437 | goto malformed; |
3c567a52 | 1438 | } |
75b2920a | 1439 | |
3c567a52 HL |
1440 | if (!ossl_quic_wire_decode_transport_param_int(&pkt, &id, &v)) { |
1441 | reason = TP_REASON_MALFORMED("INITIAL_MAX_STREAM_DATA_UNI"); | |
75b2920a | 1442 | goto malformed; |
3c567a52 | 1443 | } |
75b2920a | 1444 | |
e8fe7a21 | 1445 | ch->rx_init_max_stream_data_uni = v; |
26ad16ea HL |
1446 | |
1447 | /* Apply to all existing streams. */ | |
1448 | ossl_quic_stream_map_visit(&ch->qsm, txfc_bump_cwm_uni, &v); | |
75b2920a HL |
1449 | got_initial_max_stream_data_uni = 1; |
1450 | break; | |
1451 | ||
1452 | case QUIC_TPARAM_ACK_DELAY_EXP: | |
3c567a52 | 1453 | if (got_ack_delay_exp) { |
75b2920a | 1454 | /* must not appear more than once */ |
3c567a52 | 1455 | reason = TP_REASON_DUP("ACK_DELAY_EXP"); |
75b2920a | 1456 | goto malformed; |
3c567a52 | 1457 | } |
75b2920a HL |
1458 | |
1459 | if (!ossl_quic_wire_decode_transport_param_int(&pkt, &id, &v) | |
3c567a52 HL |
1460 | || v > QUIC_MAX_ACK_DELAY_EXP) { |
1461 | reason = TP_REASON_MALFORMED("ACK_DELAY_EXP"); | |
75b2920a | 1462 | goto malformed; |
3c567a52 | 1463 | } |
75b2920a HL |
1464 | |
1465 | ch->rx_ack_delay_exp = (unsigned char)v; | |
1466 | got_ack_delay_exp = 1; | |
1467 | break; | |
1468 | ||
1469 | case QUIC_TPARAM_MAX_ACK_DELAY: | |
3c567a52 | 1470 | if (got_max_ack_delay) { |
75b2920a | 1471 | /* must not appear more than once */ |
3c567a52 | 1472 | reason = TP_REASON_DUP("MAX_ACK_DELAY"); |
96014840 | 1473 | goto malformed; |
3c567a52 | 1474 | } |
75b2920a HL |
1475 | |
1476 | if (!ossl_quic_wire_decode_transport_param_int(&pkt, &id, &v) | |
3c567a52 HL |
1477 | || v >= (((uint64_t)1) << 14)) { |
1478 | reason = TP_REASON_MALFORMED("MAX_ACK_DELAY"); | |
75b2920a | 1479 | goto malformed; |
3c567a52 | 1480 | } |
75b2920a HL |
1481 | |
1482 | ch->rx_max_ack_delay = v; | |
f13868de HL |
1483 | ossl_ackm_set_rx_max_ack_delay(ch->ackm, |
1484 | ossl_ms2time(ch->rx_max_ack_delay)); | |
1485 | ||
75b2920a HL |
1486 | got_max_ack_delay = 1; |
1487 | break; | |
1488 | ||
1489 | case QUIC_TPARAM_INITIAL_MAX_STREAMS_BIDI: | |
3c567a52 | 1490 | if (got_initial_max_streams_bidi) { |
75b2920a | 1491 | /* must not appear more than once */ |
3c567a52 | 1492 | reason = TP_REASON_DUP("INITIAL_MAX_STREAMS_BIDI"); |
96014840 | 1493 | goto malformed; |
3c567a52 | 1494 | } |
75b2920a HL |
1495 | |
1496 | if (!ossl_quic_wire_decode_transport_param_int(&pkt, &id, &v) | |
3c567a52 HL |
1497 | || v > (((uint64_t)1) << 60)) { |
1498 | reason = TP_REASON_MALFORMED("INITIAL_MAX_STREAMS_BIDI"); | |
75b2920a | 1499 | goto malformed; |
3c567a52 | 1500 | } |
75b2920a HL |
1501 | |
1502 | assert(ch->max_local_streams_bidi == 0); | |
1503 | ch->max_local_streams_bidi = v; | |
1504 | got_initial_max_streams_bidi = 1; | |
1505 | break; | |
1506 | ||
1507 | case QUIC_TPARAM_INITIAL_MAX_STREAMS_UNI: | |
3c567a52 | 1508 | if (got_initial_max_streams_uni) { |
75b2920a | 1509 | /* must not appear more than once */ |
3c567a52 | 1510 | reason = TP_REASON_DUP("INITIAL_MAX_STREAMS_UNI"); |
75b2920a | 1511 | goto malformed; |
3c567a52 | 1512 | } |
75b2920a HL |
1513 | |
1514 | if (!ossl_quic_wire_decode_transport_param_int(&pkt, &id, &v) | |
3c567a52 HL |
1515 | || v > (((uint64_t)1) << 60)) { |
1516 | reason = TP_REASON_MALFORMED("INITIAL_MAX_STREAMS_UNI"); | |
75b2920a | 1517 | goto malformed; |
3c567a52 | 1518 | } |
75b2920a HL |
1519 | |
1520 | assert(ch->max_local_streams_uni == 0); | |
1521 | ch->max_local_streams_uni = v; | |
1522 | got_initial_max_streams_uni = 1; | |
1523 | break; | |
1524 | ||
1525 | case QUIC_TPARAM_MAX_IDLE_TIMEOUT: | |
3c567a52 | 1526 | if (got_max_idle_timeout) { |
75b2920a | 1527 | /* must not appear more than once */ |
3c567a52 | 1528 | reason = TP_REASON_DUP("MAX_IDLE_TIMEOUT"); |
75b2920a | 1529 | goto malformed; |
3c567a52 | 1530 | } |
75b2920a | 1531 | |
3c567a52 HL |
1532 | if (!ossl_quic_wire_decode_transport_param_int(&pkt, &id, &v)) { |
1533 | reason = TP_REASON_MALFORMED("MAX_IDLE_TIMEOUT"); | |
75b2920a | 1534 | goto malformed; |
3c567a52 | 1535 | } |
75b2920a | 1536 | |
4648eac5 | 1537 | if (v > 0 && v < ch->max_idle_timeout) |
75b2920a HL |
1538 | ch->max_idle_timeout = v; |
1539 | ||
1540 | ch_update_idle(ch); | |
1541 | got_max_idle_timeout = 1; | |
1542 | break; | |
f538b421 | 1543 | |
75b2920a | 1544 | case QUIC_TPARAM_MAX_UDP_PAYLOAD_SIZE: |
3c567a52 | 1545 | if (got_max_udp_payload_size) { |
75b2920a | 1546 | /* must not appear more than once */ |
3c567a52 | 1547 | reason = TP_REASON_DUP("MAX_UDP_PAYLOAD_SIZE"); |
75b2920a | 1548 | goto malformed; |
3c567a52 | 1549 | } |
f538b421 | 1550 | |
75b2920a | 1551 | if (!ossl_quic_wire_decode_transport_param_int(&pkt, &id, &v) |
3c567a52 HL |
1552 | || v < QUIC_MIN_INITIAL_DGRAM_LEN) { |
1553 | reason = TP_REASON_MALFORMED("MAX_UDP_PAYLOAD_SIZE"); | |
75b2920a | 1554 | goto malformed; |
3c567a52 | 1555 | } |
75b2920a HL |
1556 | |
1557 | ch->rx_max_udp_payload_size = v; | |
1558 | got_max_udp_payload_size = 1; | |
1559 | break; | |
1560 | ||
1561 | case QUIC_TPARAM_ACTIVE_CONN_ID_LIMIT: | |
3c567a52 | 1562 | if (got_active_conn_id_limit) { |
75b2920a | 1563 | /* must not appear more than once */ |
3c567a52 | 1564 | reason = TP_REASON_DUP("ACTIVE_CONN_ID_LIMIT"); |
75b2920a | 1565 | goto malformed; |
3c567a52 | 1566 | } |
75b2920a HL |
1567 | |
1568 | if (!ossl_quic_wire_decode_transport_param_int(&pkt, &id, &v) | |
3c567a52 HL |
1569 | || v < QUIC_MIN_ACTIVE_CONN_ID_LIMIT) { |
1570 | reason = TP_REASON_MALFORMED("ACTIVE_CONN_ID_LIMIT"); | |
75b2920a | 1571 | goto malformed; |
3c567a52 | 1572 | } |
75b2920a HL |
1573 | |
1574 | ch->rx_active_conn_id_limit = v; | |
1575 | got_active_conn_id_limit = 1; | |
1576 | break; | |
1577 | ||
3c567a52 | 1578 | case QUIC_TPARAM_STATELESS_RESET_TOKEN: |
70e809b0 HL |
1579 | if (got_stateless_reset_token) { |
1580 | reason = TP_REASON_DUP("STATELESS_RESET_TOKEN"); | |
1581 | goto malformed; | |
1582 | } | |
1583 | ||
3c567a52 | 1584 | /* |
cdd91631 P |
1585 | * We must ensure a client doesn't send them because we don't have |
1586 | * processing for them. | |
1587 | * | |
1588 | * TODO(QUIC SERVER): remove this restriction | |
3c567a52 HL |
1589 | */ |
1590 | if (ch->is_server) { | |
1591 | reason = TP_REASON_SERVER_ONLY("STATELESS_RESET_TOKEN"); | |
1592 | goto malformed; | |
1593 | } | |
1594 | ||
1595 | body = ossl_quic_wire_decode_transport_param_bytes(&pkt, &id, &len); | |
1596 | if (body == NULL || len != QUIC_STATELESS_RESET_TOKEN_LEN) { | |
1597 | reason = TP_REASON_MALFORMED("STATELESS_RESET_TOKEN"); | |
1598 | goto malformed; | |
1599 | } | |
cdd91631 P |
1600 | if (!chan_add_reset_token(ch, body, ch->cur_remote_seq_num)) { |
1601 | reason = TP_REASON_INTERNAL_ERROR("STATELESS_RESET_TOKEN"); | |
1602 | goto malformed; | |
1603 | } | |
3c567a52 | 1604 | |
70e809b0 | 1605 | got_stateless_reset_token = 1; |
3c567a52 HL |
1606 | break; |
1607 | ||
1608 | case QUIC_TPARAM_PREFERRED_ADDR: | |
54bd1f24 | 1609 | { |
44cb36d0 | 1610 | /* TODO(QUIC FUTURE): Handle preferred address. */ |
54bd1f24 | 1611 | QUIC_PREFERRED_ADDR pfa; |
70e809b0 HL |
1612 | if (got_preferred_addr) { |
1613 | reason = TP_REASON_DUP("PREFERRED_ADDR"); | |
1614 | goto malformed; | |
1615 | } | |
54bd1f24 HL |
1616 | |
1617 | /* | |
1618 | * RFC 9000 s. 18.2: "A server that chooses a zero-length | |
1619 | * connection ID MUST NOT provide a preferred address. | |
1620 | * Similarly, a server MUST NOT include a zero-length connection | |
1621 | * ID in this transport parameter. A client MUST treat a | |
1622 | * violation of these requirements as a connection error of type | |
1623 | * TRANSPORT_PARAMETER_ERROR." | |
1624 | */ | |
1625 | if (ch->is_server) { | |
1626 | reason = TP_REASON_SERVER_ONLY("PREFERRED_ADDR"); | |
1627 | goto malformed; | |
1628 | } | |
1629 | ||
1630 | if (ch->cur_remote_dcid.id_len == 0) { | |
1631 | reason = "PREFERRED_ADDR provided for zero-length CID"; | |
1632 | goto malformed; | |
1633 | } | |
1634 | ||
1635 | if (!ossl_quic_wire_decode_transport_param_preferred_addr(&pkt, &pfa)) { | |
1636 | reason = TP_REASON_MALFORMED("PREFERRED_ADDR"); | |
1637 | goto malformed; | |
1638 | } | |
1639 | ||
1640 | if (pfa.cid.id_len == 0) { | |
1641 | reason = "zero-length CID in PREFERRED_ADDR"; | |
1642 | goto malformed; | |
1643 | } | |
70e809b0 HL |
1644 | |
1645 | got_preferred_addr = 1; | |
3c567a52 | 1646 | } |
3c567a52 | 1647 | break; |
75b2920a HL |
1648 | |
1649 | case QUIC_TPARAM_DISABLE_ACTIVE_MIGRATION: | |
1650 | /* We do not currently handle migration, so nothing to do. */ | |
0911cb4a HL |
1651 | if (got_disable_active_migration) { |
1652 | /* must not appear more than once */ | |
1653 | reason = TP_REASON_DUP("DISABLE_ACTIVE_MIGRATION"); | |
1654 | goto malformed; | |
1655 | } | |
1656 | ||
1657 | body = ossl_quic_wire_decode_transport_param_bytes(&pkt, &id, &len); | |
1658 | if (body == NULL || len > 0) { | |
1659 | reason = TP_REASON_MALFORMED("DISABLE_ACTIVE_MIGRATION"); | |
1660 | goto malformed; | |
1661 | } | |
1662 | ||
1663 | got_disable_active_migration = 1; | |
1664 | break; | |
1665 | ||
75b2920a | 1666 | default: |
0911cb4a HL |
1667 | /* |
1668 | * Skip over and ignore. | |
1669 | * | |
1670 | * RFC 9000 s. 7.4: We SHOULD treat duplicated transport parameters | |
1671 | * as a connection error, but we are not required to. Currently, | |
1672 | * handle this programmatically by checking for duplicates in the | |
1673 | * parameters that we recognise, as above, but don't bother | |
1674 | * maintaining a list of duplicates for anything we don't recognise. | |
1675 | */ | |
75b2920a HL |
1676 | body = ossl_quic_wire_decode_transport_param_bytes(&pkt, &id, |
1677 | &len); | |
1678 | if (body == NULL) | |
1679 | goto malformed; | |
1680 | ||
1681 | break; | |
f538b421 HL |
1682 | } |
1683 | } | |
1684 | ||
3c567a52 HL |
1685 | if (!got_initial_scid) { |
1686 | reason = TP_REASON_REQUIRED("INITIAL_SCID"); | |
f538b421 | 1687 | goto malformed; |
3c567a52 HL |
1688 | } |
1689 | ||
1690 | if (!ch->is_server) { | |
1691 | if (!got_orig_dcid) { | |
1692 | reason = TP_REASON_REQUIRED("ORIG_DCID"); | |
1693 | goto malformed; | |
1694 | } | |
1695 | ||
1696 | if (ch->doing_retry && !got_retry_scid) { | |
1697 | reason = TP_REASON_REQUIRED("RETRY_SCID"); | |
1698 | goto malformed; | |
1699 | } | |
1700 | } | |
f538b421 HL |
1701 | |
1702 | ch->got_remote_transport_params = 1; | |
1703 | ||
1704 | if (got_initial_max_data || got_initial_max_stream_data_bidi_remote | |
1705 | || got_initial_max_streams_bidi || got_initial_max_streams_uni) | |
26ad16ea HL |
1706 | /* |
1707 | * If FC credit was bumped, we may now be able to send. Update all | |
1708 | * streams. | |
1709 | */ | |
1710 | ossl_quic_stream_map_visit(&ch->qsm, do_update, ch); | |
f538b421 HL |
1711 | |
1712 | /* If we are a server, we now generate our own transport parameters. */ | |
1713 | if (ch->is_server && !ch_generate_transport_params(ch)) { | |
1714 | ossl_quic_channel_raise_protocol_error(ch, QUIC_ERR_INTERNAL_ERROR, 0, | |
1715 | "internal error"); | |
1716 | return 0; | |
1717 | } | |
1718 | ||
1719 | return 1; | |
1720 | ||
1721 | malformed: | |
1722 | ossl_quic_channel_raise_protocol_error(ch, QUIC_ERR_TRANSPORT_PARAMETER_ERROR, | |
3c567a52 | 1723 | 0, reason); |
f538b421 HL |
1724 | return 0; |
1725 | } | |
1726 | ||
1727 | /* | |
1728 | * Called when we want to generate transport parameters. This is called | |
1729 | * immediately at instantiation time for a client and after we receive the | |
1730 | * client's transport parameters for a server. | |
1731 | */ | |
1732 | static int ch_generate_transport_params(QUIC_CHANNEL *ch) | |
1733 | { | |
1734 | int ok = 0; | |
1735 | BUF_MEM *buf_mem = NULL; | |
1736 | WPACKET wpkt; | |
1737 | int wpkt_valid = 0; | |
1738 | size_t buf_len = 0; | |
1739 | ||
1740 | if (ch->local_transport_params != NULL) | |
1741 | goto err; | |
1742 | ||
1743 | if ((buf_mem = BUF_MEM_new()) == NULL) | |
1744 | goto err; | |
1745 | ||
1746 | if (!WPACKET_init(&wpkt, buf_mem)) | |
1747 | goto err; | |
1748 | ||
1749 | wpkt_valid = 1; | |
1750 | ||
1751 | if (ossl_quic_wire_encode_transport_param_bytes(&wpkt, QUIC_TPARAM_DISABLE_ACTIVE_MIGRATION, | |
1752 | NULL, 0) == NULL) | |
1753 | goto err; | |
1754 | ||
3c567a52 HL |
1755 | if (ch->is_server) { |
1756 | if (!ossl_quic_wire_encode_transport_param_cid(&wpkt, QUIC_TPARAM_ORIG_DCID, | |
1757 | &ch->init_dcid)) | |
1758 | goto err; | |
1759 | ||
1760 | if (!ossl_quic_wire_encode_transport_param_cid(&wpkt, QUIC_TPARAM_INITIAL_SCID, | |
bbc97540 | 1761 | &ch->cur_local_cid)) |
3c567a52 HL |
1762 | goto err; |
1763 | } else { | |
1764 | /* Client always uses an empty SCID. */ | |
1765 | if (ossl_quic_wire_encode_transport_param_bytes(&wpkt, QUIC_TPARAM_INITIAL_SCID, | |
1766 | NULL, 0) == NULL) | |
1767 | goto err; | |
1768 | } | |
f538b421 HL |
1769 | |
1770 | if (!ossl_quic_wire_encode_transport_param_int(&wpkt, QUIC_TPARAM_MAX_IDLE_TIMEOUT, | |
1771 | ch->max_idle_timeout)) | |
1772 | goto err; | |
1773 | ||
1774 | if (!ossl_quic_wire_encode_transport_param_int(&wpkt, QUIC_TPARAM_MAX_UDP_PAYLOAD_SIZE, | |
1775 | QUIC_MIN_INITIAL_DGRAM_LEN)) | |
1776 | goto err; | |
1777 | ||
1778 | if (!ossl_quic_wire_encode_transport_param_int(&wpkt, QUIC_TPARAM_ACTIVE_CONN_ID_LIMIT, | |
54bd1f24 | 1779 | QUIC_MIN_ACTIVE_CONN_ID_LIMIT)) |
f538b421 HL |
1780 | goto err; |
1781 | ||
f13868de HL |
1782 | if (ch->tx_max_ack_delay != QUIC_DEFAULT_MAX_ACK_DELAY |
1783 | && !ossl_quic_wire_encode_transport_param_int(&wpkt, QUIC_TPARAM_MAX_ACK_DELAY, | |
1784 | ch->tx_max_ack_delay)) | |
1785 | goto err; | |
1786 | ||
f538b421 HL |
1787 | if (!ossl_quic_wire_encode_transport_param_int(&wpkt, QUIC_TPARAM_INITIAL_MAX_DATA, |
1788 | ossl_quic_rxfc_get_cwm(&ch->conn_rxfc))) | |
1789 | goto err; | |
1790 | ||
0815b725 | 1791 | /* Send the default CWM for a new RXFC. */ |
f538b421 | 1792 | if (!ossl_quic_wire_encode_transport_param_int(&wpkt, QUIC_TPARAM_INITIAL_MAX_STREAM_DATA_BIDI_LOCAL, |
0815b725 | 1793 | ch->tx_init_max_stream_data_bidi_local)) |
f538b421 HL |
1794 | goto err; |
1795 | ||
1796 | if (!ossl_quic_wire_encode_transport_param_int(&wpkt, QUIC_TPARAM_INITIAL_MAX_STREAM_DATA_BIDI_REMOTE, | |
0815b725 | 1797 | ch->tx_init_max_stream_data_bidi_remote)) |
f538b421 HL |
1798 | goto err; |
1799 | ||
1800 | if (!ossl_quic_wire_encode_transport_param_int(&wpkt, QUIC_TPARAM_INITIAL_MAX_STREAM_DATA_UNI, | |
0815b725 | 1801 | ch->tx_init_max_stream_data_uni)) |
f538b421 HL |
1802 | goto err; |
1803 | ||
1804 | if (!ossl_quic_wire_encode_transport_param_int(&wpkt, QUIC_TPARAM_INITIAL_MAX_STREAMS_BIDI, | |
a6b6ea17 | 1805 | ossl_quic_rxfc_get_cwm(&ch->max_streams_bidi_rxfc))) |
f538b421 HL |
1806 | goto err; |
1807 | ||
1808 | if (!ossl_quic_wire_encode_transport_param_int(&wpkt, QUIC_TPARAM_INITIAL_MAX_STREAMS_UNI, | |
a6b6ea17 | 1809 | ossl_quic_rxfc_get_cwm(&ch->max_streams_uni_rxfc))) |
f538b421 HL |
1810 | goto err; |
1811 | ||
eff04652 TM |
1812 | if (!WPACKET_finish(&wpkt)) |
1813 | goto err; | |
1814 | ||
1815 | wpkt_valid = 0; | |
1816 | ||
f538b421 HL |
1817 | if (!WPACKET_get_total_written(&wpkt, &buf_len)) |
1818 | goto err; | |
1819 | ||
1820 | ch->local_transport_params = (unsigned char *)buf_mem->data; | |
1821 | buf_mem->data = NULL; | |
1822 | ||
f538b421 | 1823 | |
2723d705 | 1824 | if (!ossl_quic_tls_set_transport_params(ch->qtls, ch->local_transport_params, |
f538b421 HL |
1825 | buf_len)) |
1826 | goto err; | |
1827 | ||
1828 | ok = 1; | |
1829 | err: | |
1830 | if (wpkt_valid) | |
1831 | WPACKET_cleanup(&wpkt); | |
1832 | BUF_MEM_free(buf_mem); | |
1833 | return ok; | |
1834 | } | |
1835 | ||
1836 | /* | |
1837 | * QUIC Channel: Ticker-Mutator | |
1838 | * ============================ | |
1839 | */ | |
1840 | ||
1841 | /* | |
1842 | * The central ticker function called by the reactor. This does everything, or | |
1843 | * at least everything network I/O related. Best effort - not allowed to fail | |
1844 | * "loudly". | |
1845 | */ | |
ccd31037 | 1846 | static void ch_tick(QUIC_TICK_RESULT *res, void *arg, uint32_t flags) |
f538b421 HL |
1847 | { |
1848 | OSSL_TIME now, deadline; | |
1849 | QUIC_CHANNEL *ch = arg; | |
9cf091a3 | 1850 | int channel_only = (flags & QUIC_REACTOR_TICK_FLAG_CHANNEL_ONLY) != 0; |
80bcc4f1 | 1851 | uint64_t error_code; |
7a2bb210 HL |
1852 | const char *error_msg; |
1853 | ERR_STATE *error_state = NULL; | |
f538b421 HL |
1854 | |
1855 | /* | |
1856 | * When we tick the QUIC connection, we do everything we need to do | |
1857 | * periodically. In order, we: | |
1858 | * | |
1859 | * - handle any incoming data from the network; | |
1860 | * - handle any timer events which are due to fire (ACKM, etc.) | |
1861 | * - write any data to the network due to be sent, to the extent | |
1862 | * possible; | |
1863 | * - determine the time at which we should next be ticked. | |
1864 | */ | |
1865 | ||
1866 | /* If we are in the TERMINATED state, there is nothing to do. */ | |
c12e1113 | 1867 | if (ossl_quic_channel_is_terminated(ch)) { |
b639475a HL |
1868 | res->net_read_desired = 0; |
1869 | res->net_write_desired = 0; | |
1870 | res->tick_deadline = ossl_time_infinite(); | |
f538b421 HL |
1871 | return; |
1872 | } | |
1873 | ||
1874 | /* | |
1875 | * If we are in the TERMINATING state, check if the terminating timer has | |
1876 | * expired. | |
1877 | */ | |
c12e1113 | 1878 | if (ossl_quic_channel_is_terminating(ch)) { |
b212d554 | 1879 | now = get_time(ch); |
f538b421 HL |
1880 | |
1881 | if (ossl_time_compare(now, ch->terminate_deadline) >= 0) { | |
1882 | ch_on_terminating_timeout(ch); | |
b639475a HL |
1883 | res->net_read_desired = 0; |
1884 | res->net_write_desired = 0; | |
1885 | res->tick_deadline = ossl_time_infinite(); | |
f538b421 HL |
1886 | return; /* abort normal processing, nothing to do */ |
1887 | } | |
1888 | } | |
1889 | ||
03b38595 HL |
1890 | if (!ch->inhibit_tick) { |
1891 | /* Handle RXKU timeouts. */ | |
1892 | ch_rxku_tick(ch); | |
8a65e7a5 | 1893 | |
03b38595 HL |
1894 | /* Handle any incoming data from network. */ |
1895 | ch_rx_pre(ch); | |
3bf4dc8c | 1896 | |
03b38595 HL |
1897 | do { |
1898 | /* Process queued incoming packets. */ | |
1899 | ch_rx(ch); | |
f538b421 | 1900 | |
03b38595 HL |
1901 | /* |
1902 | * Allow the handshake layer to check for any new incoming data and | |
1903 | * generate new outgoing data. | |
1904 | */ | |
1905 | ch->have_new_rx_secret = 0; | |
80bcc4f1 | 1906 | if (!channel_only) { |
03b38595 | 1907 | ossl_quic_tls_tick(ch->qtls); |
4e64437a | 1908 | |
741170be | 1909 | if (ossl_quic_tls_get_error(ch->qtls, &error_code, &error_msg, |
7a2bb210 HL |
1910 | &error_state)) |
1911 | ossl_quic_channel_raise_protocol_error_state(ch, error_code, 0, | |
1912 | error_msg, error_state); | |
80bcc4f1 HL |
1913 | } |
1914 | ||
03b38595 HL |
1915 | /* |
1916 | * If the handshake layer gave us a new secret, we need to do RX | |
1917 | * again because packets that were not previously processable and | |
1918 | * were deferred might now be processable. | |
1919 | * | |
44cb36d0 | 1920 | * TODO(QUIC FUTURE): Consider handling this in the yield_secret callback. |
03b38595 HL |
1921 | */ |
1922 | } while (ch->have_new_rx_secret); | |
1923 | } | |
f538b421 HL |
1924 | |
1925 | /* | |
03b38595 HL |
1926 | * Handle any timer events which are due to fire; namely, the loss |
1927 | * detection deadline and the idle timeout. | |
f538b421 | 1928 | * |
03b38595 HL |
1929 | * ACKM ACK generation deadline is polled by TXP, so we don't need to |
1930 | * handle it here. | |
f538b421 | 1931 | */ |
b212d554 | 1932 | now = get_time(ch); |
f538b421 HL |
1933 | if (ossl_time_compare(now, ch->idle_deadline) >= 0) { |
1934 | /* | |
03b38595 HL |
1935 | * Idle timeout differs from normal protocol violation because we do |
1936 | * not send a CONN_CLOSE frame; go straight to TERMINATED. | |
f538b421 | 1937 | */ |
03b38595 HL |
1938 | if (!ch->inhibit_tick) |
1939 | ch_on_idle_timeout(ch); | |
1940 | ||
b639475a HL |
1941 | res->net_read_desired = 0; |
1942 | res->net_write_desired = 0; | |
1943 | res->tick_deadline = ossl_time_infinite(); | |
f538b421 HL |
1944 | return; |
1945 | } | |
1946 | ||
03b38595 HL |
1947 | if (!ch->inhibit_tick) { |
1948 | deadline = ossl_ackm_get_loss_detection_deadline(ch->ackm); | |
1949 | if (!ossl_time_is_zero(deadline) | |
1950 | && ossl_time_compare(now, deadline) >= 0) | |
1951 | ossl_ackm_on_timeout(ch->ackm); | |
f538b421 | 1952 | |
03b38595 HL |
1953 | /* If a ping is due, inform TXP. */ |
1954 | if (ossl_time_compare(now, ch->ping_deadline) >= 0) { | |
1955 | int pn_space = ossl_quic_enc_level_to_pn_space(ch->tx_enc_level); | |
3b1ab5a3 | 1956 | |
03b38595 HL |
1957 | ossl_quic_tx_packetiser_schedule_ack_eliciting(ch->txp, pn_space); |
1958 | } | |
3b1ab5a3 | 1959 | |
03b38595 HL |
1960 | /* Write any data to the network due to be sent. */ |
1961 | ch_tx(ch); | |
f538b421 | 1962 | |
03b38595 HL |
1963 | /* Do stream GC. */ |
1964 | ossl_quic_stream_map_gc(&ch->qsm); | |
1965 | } | |
0847e63e | 1966 | |
f538b421 HL |
1967 | /* Determine the time at which we should next be ticked. */ |
1968 | res->tick_deadline = ch_determine_next_tick_deadline(ch); | |
1969 | ||
df15e990 HL |
1970 | /* |
1971 | * Always process network input unless we are now terminated. | |
1972 | * Although we had not terminated at the beginning of this tick, network | |
1973 | * errors in ch_rx_pre() or ch_tx() may have caused us to transition to the | |
1974 | * Terminated state. | |
1975 | */ | |
c12e1113 | 1976 | res->net_read_desired = !ossl_quic_channel_is_terminated(ch); |
f538b421 HL |
1977 | |
1978 | /* We want to write to the network if we have any in our queue. */ | |
b639475a | 1979 | res->net_write_desired |
c12e1113 | 1980 | = (!ossl_quic_channel_is_terminated(ch) |
df15e990 | 1981 | && ossl_qtx_get_queue_len_datagrams(ch->qtx) > 0); |
f538b421 HL |
1982 | } |
1983 | ||
3bf4dc8c HL |
1984 | /* Process incoming datagrams, if any. */ |
1985 | static void ch_rx_pre(QUIC_CHANNEL *ch) | |
1986 | { | |
df15e990 HL |
1987 | int ret; |
1988 | ||
b1b06da2 | 1989 | if (!ch->is_server && !ch->have_sent_any_pkt) |
3bf4dc8c HL |
1990 | return; |
1991 | ||
1992 | /* | |
1993 | * Get DEMUX to BIO_recvmmsg from the network and queue incoming datagrams | |
1994 | * to the appropriate QRX instance. | |
1995 | */ | |
df15e990 | 1996 | ret = ossl_quic_demux_pump(ch->demux); |
cdd91631 P |
1997 | if (ret == QUIC_DEMUX_PUMP_RES_STATELESS_RESET) |
1998 | ch_stateless_reset(ch); | |
1999 | else if (ret == QUIC_DEMUX_PUMP_RES_PERMANENT_FAIL) | |
df15e990 HL |
2000 | /* |
2001 | * We don't care about transient failure, but permanent failure means we | |
2002 | * should tear down the connection as though a protocol violation | |
2003 | * occurred. Skip straight to the Terminating state as there is no point | |
2004 | * trying to send CONNECTION_CLOSE frames if the network BIO is not | |
2005 | * operating correctly. | |
2006 | */ | |
2007 | ch_raise_net_error(ch); | |
3bf4dc8c HL |
2008 | } |
2009 | ||
48120ea5 HL |
2010 | /* Check incoming forged packet limit and terminate connection if needed. */ |
2011 | static void ch_rx_check_forged_pkt_limit(QUIC_CHANNEL *ch) | |
2012 | { | |
2013 | uint32_t enc_level; | |
2014 | uint64_t limit = UINT64_MAX, l; | |
2015 | ||
2016 | for (enc_level = QUIC_ENC_LEVEL_INITIAL; | |
2017 | enc_level < QUIC_ENC_LEVEL_NUM; | |
2018 | ++enc_level) | |
2019 | { | |
2020 | /* | |
2021 | * Different ELs can have different AEADs which can in turn impose | |
2022 | * different limits, so use the lowest value of any currently valid EL. | |
2023 | */ | |
2024 | if ((ch->el_discarded & (1U << enc_level)) != 0) | |
2025 | continue; | |
2026 | ||
2027 | if (enc_level > ch->rx_enc_level) | |
2028 | break; | |
2029 | ||
2030 | l = ossl_qrx_get_max_forged_pkt_count(ch->qrx, enc_level); | |
2031 | if (l < limit) | |
2032 | limit = l; | |
2033 | } | |
2034 | ||
2035 | if (ossl_qrx_get_cur_forged_pkt_count(ch->qrx) < limit) | |
2036 | return; | |
2037 | ||
2038 | ossl_quic_channel_raise_protocol_error(ch, QUIC_ERR_AEAD_LIMIT_REACHED, 0, | |
2039 | "forgery limit"); | |
2040 | } | |
2041 | ||
3bf4dc8c | 2042 | /* Process queued incoming packets and handle frames, if any. */ |
f538b421 HL |
2043 | static int ch_rx(QUIC_CHANNEL *ch) |
2044 | { | |
2045 | int handled_any = 0; | |
50e76846 | 2046 | const int closing = ossl_quic_channel_is_closing(ch); |
f538b421 | 2047 | |
b1b06da2 | 2048 | if (!ch->is_server && !ch->have_sent_any_pkt) |
f538b421 HL |
2049 | /* |
2050 | * We have not sent anything yet, therefore there is no need to check | |
75b2920a | 2051 | * for incoming data. |
f538b421 HL |
2052 | */ |
2053 | return 1; | |
2054 | ||
f538b421 HL |
2055 | for (;;) { |
2056 | assert(ch->qrx_pkt == NULL); | |
2057 | ||
2058 | if (!ossl_qrx_read_pkt(ch->qrx, &ch->qrx_pkt)) | |
2059 | break; | |
2060 | ||
50e76846 P |
2061 | /* Track the amount of data received while in the closing state */ |
2062 | if (closing) | |
2063 | ossl_quic_tx_packetiser_record_received_closing_bytes( | |
2064 | ch->txp, ch->qrx_pkt->hdr->len); | |
2065 | ||
8fd32a0e | 2066 | if (!handled_any) { |
f538b421 | 2067 | ch_update_idle(ch); |
8fd32a0e TM |
2068 | ch_update_ping_deadline(ch); |
2069 | } | |
f538b421 HL |
2070 | |
2071 | ch_rx_handle_packet(ch); /* best effort */ | |
2072 | ||
2073 | /* | |
2074 | * Regardless of the outcome of frame handling, unref the packet. | |
2075 | * This will free the packet unless something added another | |
2076 | * reference to it during frame processing. | |
2077 | */ | |
2078 | ossl_qrx_pkt_release(ch->qrx_pkt); | |
2079 | ch->qrx_pkt = NULL; | |
2080 | ||
3b1ab5a3 | 2081 | ch->have_sent_ack_eliciting_since_rx = 0; |
f538b421 HL |
2082 | handled_any = 1; |
2083 | } | |
2084 | ||
48120ea5 HL |
2085 | ch_rx_check_forged_pkt_limit(ch); |
2086 | ||
f538b421 HL |
2087 | /* |
2088 | * When in TERMINATING - CLOSING, generate a CONN_CLOSE frame whenever we | |
2089 | * process one or more incoming packets. | |
2090 | */ | |
50e76846 | 2091 | if (handled_any && closing) |
f538b421 HL |
2092 | ch->conn_close_queued = 1; |
2093 | ||
2094 | return 1; | |
2095 | } | |
2096 | ||
3ffb7d10 HL |
2097 | static int bio_addr_eq(const BIO_ADDR *a, const BIO_ADDR *b) |
2098 | { | |
2099 | if (BIO_ADDR_family(a) != BIO_ADDR_family(b)) | |
2100 | return 0; | |
2101 | ||
2102 | switch (BIO_ADDR_family(a)) { | |
2103 | case AF_INET: | |
2104 | return !memcmp(&a->s_in.sin_addr, | |
2105 | &b->s_in.sin_addr, | |
2106 | sizeof(a->s_in.sin_addr)) | |
2107 | && a->s_in.sin_port == b->s_in.sin_port; | |
9c8d04db | 2108 | #if OPENSSL_USE_IPV6 |
3ffb7d10 HL |
2109 | case AF_INET6: |
2110 | return !memcmp(&a->s_in6.sin6_addr, | |
2111 | &b->s_in6.sin6_addr, | |
2112 | sizeof(a->s_in6.sin6_addr)) | |
2113 | && a->s_in6.sin6_port == b->s_in6.sin6_port; | |
9c8d04db | 2114 | #endif |
3ffb7d10 HL |
2115 | default: |
2116 | return 0; /* not supported */ | |
2117 | } | |
2118 | ||
2119 | return 1; | |
2120 | } | |
2121 | ||
f538b421 HL |
2122 | /* Handles the packet currently in ch->qrx_pkt->hdr. */ |
2123 | static void ch_rx_handle_packet(QUIC_CHANNEL *ch) | |
2124 | { | |
2125 | uint32_t enc_level; | |
777a8a7f | 2126 | int old_have_processed_any_pkt = ch->have_processed_any_pkt; |
f538b421 HL |
2127 | |
2128 | assert(ch->qrx_pkt != NULL); | |
2129 | ||
50e76846 P |
2130 | /* |
2131 | * RFC 9000 s. 10.2.1 Closing Connection State: | |
2132 | * An endpoint that is closing is not required to process any | |
2133 | * received frame. | |
2134 | */ | |
8a6a00e3 | 2135 | if (!ossl_quic_channel_is_active(ch)) |
8a6a00e3 HL |
2136 | return; |
2137 | ||
f538b421 HL |
2138 | if (ossl_quic_pkt_type_is_encrypted(ch->qrx_pkt->hdr->type)) { |
2139 | if (!ch->have_received_enc_pkt) { | |
eff04652 | 2140 | ch->cur_remote_dcid = ch->init_scid = ch->qrx_pkt->hdr->src_conn_id; |
f538b421 HL |
2141 | ch->have_received_enc_pkt = 1; |
2142 | ||
2143 | /* | |
2144 | * We change to using the SCID in the first Initial packet as the | |
2145 | * DCID. | |
2146 | */ | |
2147 | ossl_quic_tx_packetiser_set_cur_dcid(ch->txp, &ch->init_scid); | |
2148 | } | |
2149 | ||
2150 | enc_level = ossl_quic_pkt_type_to_enc_level(ch->qrx_pkt->hdr->type); | |
2151 | if ((ch->el_discarded & (1U << enc_level)) != 0) | |
2152 | /* Do not process packets from ELs we have already discarded. */ | |
2153 | return; | |
2154 | } | |
2155 | ||
3ffb7d10 HL |
2156 | /* |
2157 | * RFC 9000 s. 9.6: "If a client receives packets from a new server address | |
2158 | * when the client has not initiated a migration to that address, the client | |
2159 | * SHOULD discard these packets." | |
2160 | * | |
2161 | * We need to be a bit careful here as due to the BIO abstraction layer an | |
2162 | * application is liable to be weird and lie to us about peer addresses. | |
96b7df60 HL |
2163 | * Only apply this check if we actually are using a real AF_INET or AF_INET6 |
2164 | * address. | |
3ffb7d10 HL |
2165 | */ |
2166 | if (!ch->is_server | |
2167 | && ch->qrx_pkt->peer != NULL | |
9c8d04db TC |
2168 | && ( |
2169 | BIO_ADDR_family(&ch->cur_peer_addr) == AF_INET | |
2170 | #if OPENSSL_USE_IPV6 | |
2171 | || BIO_ADDR_family(&ch->cur_peer_addr) == AF_INET6 | |
2172 | #endif | |
2173 | ) | |
3ffb7d10 HL |
2174 | && !bio_addr_eq(ch->qrx_pkt->peer, &ch->cur_peer_addr)) |
2175 | return; | |
2176 | ||
0911cb4a HL |
2177 | if (!ch->is_server |
2178 | && ch->have_received_enc_pkt | |
2179 | && ossl_quic_pkt_type_has_scid(ch->qrx_pkt->hdr->type)) { | |
2180 | /* | |
3ffb7d10 | 2181 | * RFC 9000 s. 7.2: "Once a client has received a valid Initial packet |
0911cb4a HL |
2182 | * from the server, it MUST discard any subsequent packet it receives on |
2183 | * that connection with a different SCID." | |
2184 | */ | |
2185 | if (!ossl_quic_conn_id_eq(&ch->qrx_pkt->hdr->src_conn_id, | |
2186 | &ch->init_scid)) | |
2187 | return; | |
2188 | } | |
2189 | ||
2190 | if (ossl_quic_pkt_type_has_version(ch->qrx_pkt->hdr->type) | |
2191 | && ch->qrx_pkt->hdr->version != QUIC_VERSION_1) | |
2192 | /* | |
2193 | * RFC 9000 s. 5.2.1: If a client receives a packet that uses a | |
2194 | * different version than it initially selected, it MUST discard the | |
2195 | * packet. We only ever use v1, so require it. | |
2196 | */ | |
2197 | return; | |
2198 | ||
777a8a7f HL |
2199 | ch->have_processed_any_pkt = 1; |
2200 | ||
08cb9a83 HL |
2201 | /* |
2202 | * RFC 9000 s. 17.2: "An endpoint MUST treat receipt of a packet that has a | |
2203 | * non-zero value for [the reserved bits] after removing both packet and | |
2204 | * header protection as a connection error of type PROTOCOL_VIOLATION." | |
2205 | */ | |
2206 | if (ossl_quic_pkt_type_is_encrypted(ch->qrx_pkt->hdr->type) | |
2207 | && ch->qrx_pkt->hdr->reserved != 0) { | |
2208 | ossl_quic_channel_raise_protocol_error(ch, QUIC_ERR_PROTOCOL_VIOLATION, | |
2209 | 0, "packet header reserved bits"); | |
2210 | return; | |
2211 | } | |
2212 | ||
f538b421 HL |
2213 | /* Handle incoming packet. */ |
2214 | switch (ch->qrx_pkt->hdr->type) { | |
75b2920a | 2215 | case QUIC_PKT_TYPE_RETRY: |
b1b06da2 | 2216 | if (ch->doing_retry || ch->is_server) |
75b2920a HL |
2217 | /* |
2218 | * It is not allowed to ask a client to do a retry more than | |
b1b06da2 | 2219 | * once. Clients may not send retries. |
75b2920a HL |
2220 | */ |
2221 | return; | |
f538b421 | 2222 | |
56e30325 MC |
2223 | /* |
2224 | * RFC 9000 s 17.2.5.2: After the client has received and processed an | |
2225 | * Initial or Retry packet from the server, it MUST discard any | |
2226 | * subsequent Retry packets that it receives. | |
2227 | */ | |
2228 | if (ch->have_received_enc_pkt) | |
2229 | return; | |
2230 | ||
75b2920a HL |
2231 | if (ch->qrx_pkt->hdr->len <= QUIC_RETRY_INTEGRITY_TAG_LEN) |
2232 | /* Packets with zero-length Retry Tokens are invalid. */ | |
2233 | return; | |
f538b421 | 2234 | |
75b2920a | 2235 | /* |
44cb36d0 | 2236 | * TODO(QUIC FUTURE): Theoretically this should probably be in the QRX. |
75b2920a HL |
2237 | * However because validation is dependent on context (namely the |
2238 | * client's initial DCID) we can't do this cleanly. In the future we | |
2239 | * should probably add a callback to the QRX to let it call us (via | |
2240 | * the DEMUX) and ask us about the correct original DCID, rather | |
2241 | * than allow the QRX to emit a potentially malformed packet to the | |
2242 | * upper layers. However, special casing this will do for now. | |
2243 | */ | |
2244 | if (!ossl_quic_validate_retry_integrity_tag(ch->libctx, | |
2245 | ch->propq, | |
2246 | ch->qrx_pkt->hdr, | |
2247 | &ch->init_dcid)) | |
2248 | /* Malformed retry packet, ignore. */ | |
2249 | return; | |
f538b421 | 2250 | |
96014840 TM |
2251 | if (!ch_retry(ch, ch->qrx_pkt->hdr->data, |
2252 | ch->qrx_pkt->hdr->len - QUIC_RETRY_INTEGRITY_TAG_LEN, | |
2253 | &ch->qrx_pkt->hdr->src_conn_id)) | |
2254 | ossl_quic_channel_raise_protocol_error(ch, QUIC_ERR_INTERNAL_ERROR, | |
2255 | 0, "handling retry packet"); | |
75b2920a | 2256 | break; |
f538b421 | 2257 | |
75b2920a | 2258 | case QUIC_PKT_TYPE_0RTT: |
b1b06da2 HL |
2259 | if (!ch->is_server) |
2260 | /* Clients should never receive 0-RTT packets. */ | |
2261 | return; | |
2262 | ||
2263 | /* | |
44cb36d0 TM |
2264 | * TODO(QUIC 0RTT): Implement 0-RTT on the server side. We currently |
2265 | * do not need to implement this as a client can only do 0-RTT if we | |
b1b06da2 HL |
2266 | * have given it permission to in a previous session. |
2267 | */ | |
75b2920a HL |
2268 | break; |
2269 | ||
b1b06da2 HL |
2270 | case QUIC_PKT_TYPE_INITIAL: |
2271 | case QUIC_PKT_TYPE_HANDSHAKE: | |
2272 | case QUIC_PKT_TYPE_1RTT: | |
b6125b54 | 2273 | if (ch->is_server && ch->qrx_pkt->hdr->type == QUIC_PKT_TYPE_HANDSHAKE) |
75b2920a HL |
2274 | /* |
2275 | * We automatically drop INITIAL EL keys when first successfully | |
2276 | * decrypting a HANDSHAKE packet, as per the RFC. | |
2277 | */ | |
2278 | ch_discard_el(ch, QUIC_ENC_LEVEL_INITIAL); | |
2279 | ||
54fb0072 HL |
2280 | if (ch->rxku_in_progress |
2281 | && ch->qrx_pkt->hdr->type == QUIC_PKT_TYPE_1RTT | |
2282 | && ch->qrx_pkt->pn >= ch->rxku_trigger_pn | |
2283 | && ch->qrx_pkt->key_epoch < ossl_qrx_get_key_epoch(ch->qrx)) { | |
2284 | /* | |
2285 | * RFC 9001 s. 6.4: Packets with higher packet numbers MUST be | |
2286 | * protected with either the same or newer packet protection keys | |
2287 | * than packets with lower packet numbers. An endpoint that | |
2288 | * successfully removes protection with old keys when newer keys | |
2289 | * were used for packets with lower packet numbers MUST treat this | |
2290 | * as a connection error of type KEY_UPDATE_ERROR. | |
2291 | */ | |
2292 | ossl_quic_channel_raise_protocol_error(ch, QUIC_ERR_KEY_UPDATE_ERROR, | |
2293 | 0, "new packet with old keys"); | |
2294 | break; | |
2295 | } | |
2296 | ||
fd0d5932 HL |
2297 | if (!ch->is_server |
2298 | && ch->qrx_pkt->hdr->type == QUIC_PKT_TYPE_INITIAL | |
2299 | && ch->qrx_pkt->hdr->token_len > 0) { | |
2300 | /* | |
2301 | * RFC 9000 s. 17.2.2: Clients that receive an Initial packet with a | |
2302 | * non-zero Token Length field MUST either discard the packet or | |
2303 | * generate a connection error of type PROTOCOL_VIOLATION. | |
bed20874 | 2304 | * |
8e520d27 | 2305 | * TODO(QUIC FUTURE): consider the implications of RFC 9000 s. 10.2.3 |
bed20874 P |
2306 | * Immediate Close during the Handshake: |
2307 | * However, at the cost of reducing feedback about | |
2308 | * errors for legitimate peers, some forms of denial of | |
2309 | * service can be made more difficult for an attacker | |
2310 | * if endpoints discard illegal packets rather than | |
2311 | * terminating a connection with CONNECTION_CLOSE. For | |
2312 | * this reason, endpoints MAY discard packets rather | |
2313 | * than immediately close if errors are detected in | |
2314 | * packets that lack authentication. | |
2315 | * I.e. should we drop this packet instead of closing the connection? | |
fd0d5932 HL |
2316 | */ |
2317 | ossl_quic_channel_raise_protocol_error(ch, QUIC_ERR_PROTOCOL_VIOLATION, | |
2318 | 0, "client received initial token"); | |
2319 | break; | |
2320 | } | |
2321 | ||
75b2920a HL |
2322 | /* This packet contains frames, pass to the RXDP. */ |
2323 | ossl_quic_handle_frames(ch, ch->qrx_pkt); /* best effort */ | |
2324 | break; | |
b1b06da2 | 2325 | |
777a8a7f HL |
2326 | case QUIC_PKT_TYPE_VERSION_NEG: |
2327 | /* | |
2328 | * "A client MUST discard any Version Negotiation packet if it has | |
2329 | * received and successfully processed any other packet." | |
2330 | */ | |
2331 | if (!old_have_processed_any_pkt) | |
2332 | ch_rx_handle_version_neg(ch, ch->qrx_pkt); | |
2333 | ||
2334 | break; | |
2335 | ||
b1b06da2 HL |
2336 | default: |
2337 | assert(0); | |
2338 | break; | |
2339 | } | |
2340 | } | |
2341 | ||
777a8a7f HL |
2342 | static void ch_rx_handle_version_neg(QUIC_CHANNEL *ch, OSSL_QRX_PKT *pkt) |
2343 | { | |
2344 | /* | |
2345 | * We do not support version negotiation at this time. As per RFC 9000 s. | |
2346 | * 6.2., we MUST abandon the connection attempt if we receive a Version | |
2347 | * Negotiation packet, unless we have already successfully processed another | |
2348 | * incoming packet, or the packet lists the QUIC version we want to use. | |
2349 | */ | |
2350 | PACKET vpkt; | |
2351 | unsigned long v; | |
2352 | ||
2353 | if (!PACKET_buf_init(&vpkt, pkt->hdr->data, pkt->hdr->len)) | |
2354 | return; | |
2355 | ||
2356 | while (PACKET_remaining(&vpkt) > 0) { | |
2357 | if (!PACKET_get_net_4(&vpkt, &v)) | |
2358 | break; | |
2359 | ||
2360 | if ((uint32_t)v == QUIC_VERSION_1) | |
2361 | return; | |
2362 | } | |
2363 | ||
2364 | /* No match, this is a failure case. */ | |
2365 | ch_raise_version_neg_failure(ch); | |
2366 | } | |
2367 | ||
2368 | static void ch_raise_version_neg_failure(QUIC_CHANNEL *ch) | |
2369 | { | |
2370 | QUIC_TERMINATE_CAUSE tcause = {0}; | |
2371 | ||
2372 | tcause.error_code = QUIC_ERR_CONNECTION_REFUSED; | |
2373 | tcause.reason = "version negotiation failure"; | |
2374 | tcause.reason_len = strlen(tcause.reason); | |
2375 | ||
2376 | /* | |
2377 | * Skip TERMINATING state; this is not considered a protocol error and we do | |
2378 | * not send CONNECTION_CLOSE. | |
2379 | */ | |
2380 | ch_start_terminating(ch, &tcause, 1); | |
2381 | } | |
2382 | ||
b1b06da2 HL |
2383 | /* |
2384 | * This is called by the demux when we get a packet not destined for any known | |
2385 | * DCID. | |
2386 | */ | |
2387 | static void ch_default_packet_handler(QUIC_URXE *e, void *arg) | |
2388 | { | |
2389 | QUIC_CHANNEL *ch = arg; | |
2390 | PACKET pkt; | |
2391 | QUIC_PKT_HDR hdr; | |
2392 | ||
2393 | if (!ossl_assert(ch->is_server)) | |
2394 | goto undesirable; | |
2395 | ||
2396 | /* | |
2397 | * We only support one connection to our server currently, so if we already | |
2398 | * started one, ignore any new connection attempts. | |
2399 | */ | |
2400 | if (ch->state != QUIC_CHANNEL_STATE_IDLE) | |
2401 | goto undesirable; | |
2402 | ||
2403 | /* | |
2404 | * We have got a packet for an unknown DCID. This might be an attempt to | |
2405 | * open a new connection. | |
2406 | */ | |
2407 | if (e->data_len < QUIC_MIN_INITIAL_DGRAM_LEN) | |
2408 | goto undesirable; | |
2409 | ||
2410 | if (!PACKET_buf_init(&pkt, ossl_quic_urxe_data(e), e->data_len)) | |
091f532e | 2411 | goto err; |
b1b06da2 HL |
2412 | |
2413 | /* | |
2414 | * We set short_conn_id_len to SIZE_MAX here which will cause the decode | |
2415 | * operation to fail if we get a 1-RTT packet. This is fine since we only | |
2416 | * care about Initial packets. | |
2417 | */ | |
e8528c95 | 2418 | if (!ossl_quic_wire_decode_pkt_hdr(&pkt, SIZE_MAX, 1, 0, &hdr, NULL)) |
b1b06da2 HL |
2419 | goto undesirable; |
2420 | ||
2421 | switch (hdr.version) { | |
2422 | case QUIC_VERSION_1: | |
2423 | break; | |
2424 | ||
2425 | case QUIC_VERSION_NONE: | |
2426 | default: | |
2427 | /* Unknown version or proactive version negotiation request, bail. */ | |
44cb36d0 | 2428 | /* TODO(QUIC SERVER): Handle version negotiation on server side */ |
b1b06da2 | 2429 | goto undesirable; |
f538b421 | 2430 | } |
b1b06da2 HL |
2431 | |
2432 | /* | |
2433 | * We only care about Initial packets which might be trying to establish a | |
2434 | * connection. | |
2435 | */ | |
2436 | if (hdr.type != QUIC_PKT_TYPE_INITIAL) | |
2437 | goto undesirable; | |
2438 | ||
2439 | /* | |
2440 | * Assume this is a valid attempt to initiate a connection. | |
2441 | * | |
2442 | * We do not register the DCID in the initial packet we received and that | |
2443 | * DCID is not actually used again, thus after provisioning the correct | |
2444 | * Initial keys derived from it (which is done in the call below) we pass | |
2445 | * the received packet directly to the QRX so that it can process it as a | |
2446 | * one-time thing, instead of going through the usual DEMUX DCID-based | |
2447 | * routing. | |
2448 | */ | |
2449 | if (!ch_server_on_new_conn(ch, &e->peer, | |
2450 | &hdr.src_conn_id, | |
2451 | &hdr.dst_conn_id)) | |
091f532e | 2452 | goto err; |
b1b06da2 HL |
2453 | |
2454 | ossl_qrx_inject_urxe(ch->qrx, e); | |
2455 | return; | |
2456 | ||
091f532e HL |
2457 | err: |
2458 | ossl_quic_channel_raise_protocol_error(ch, QUIC_ERR_INTERNAL_ERROR, 0, | |
2459 | "internal error"); | |
b1b06da2 HL |
2460 | undesirable: |
2461 | ossl_quic_demux_release_urxe(ch->demux, e); | |
f538b421 HL |
2462 | } |
2463 | ||
2464 | /* Try to generate packets and if possible, flush them to the network. */ | |
2465 | static int ch_tx(QUIC_CHANNEL *ch) | |
2466 | { | |
a3a51d6e | 2467 | QUIC_TXP_STATUS status; |
64fd6991 | 2468 | int res; |
3b1ab5a3 | 2469 | |
afe4a797 P |
2470 | /* |
2471 | * RFC 9000 s. 10.2.2: Draining Connection State: | |
2472 | * While otherwise identical to the closing state, an endpoint | |
2473 | * in the draining state MUST NOT send any packets. | |
2474 | * and: | |
2475 | * An endpoint MUST NOT send further packets. | |
2476 | */ | |
2477 | if (ossl_quic_channel_is_draining(ch)) | |
2478 | return 0; | |
2479 | ||
2480 | if (ossl_quic_channel_is_closing(ch)) { | |
f538b421 HL |
2481 | /* |
2482 | * While closing, only send CONN_CLOSE if we've received more traffic | |
2483 | * from the peer. Once we tell the TXP to generate CONN_CLOSE, all | |
2484 | * future calls to it generate CONN_CLOSE frames, so otherwise we would | |
2485 | * just constantly generate CONN_CLOSE frames. | |
6b3b5f9d | 2486 | * |
afe4a797 | 2487 | * Confirming to RFC 9000 s. 10.2.1 Closing Connection State: |
6b3b5f9d | 2488 | * An endpoint SHOULD limit the rate at which it generates |
afe4a797 | 2489 | * packets in the closing state. |
f538b421 HL |
2490 | */ |
2491 | if (!ch->conn_close_queued) | |
2492 | return 0; | |
2493 | ||
2494 | ch->conn_close_queued = 0; | |
2495 | } | |
2496 | ||
8a65e7a5 HL |
2497 | /* Do TXKU if we need to. */ |
2498 | ch_maybe_trigger_spontaneous_txku(ch); | |
2499 | ||
2500 | ch->rxku_pending_confirm_done = 0; | |
2501 | ||
aa433014 MC |
2502 | /* Loop until we stop generating packets to send */ |
2503 | do { | |
3b1ab5a3 | 2504 | /* |
aa433014 MC |
2505 | * Send packet, if we need to. Best effort. The TXP consults the CC and |
2506 | * applies any limitations imposed by it, so we don't need to do it here. | |
2507 | * | |
2508 | * Best effort. In particular if TXP fails for some reason we should | |
2509 | * still flush any queued packets which we already generated. | |
2510 | */ | |
2511 | res = ossl_quic_tx_packetiser_generate(ch->txp, &status); | |
2512 | if (status.sent_pkt > 0) { | |
2513 | ch->have_sent_any_pkt = 1; /* Packet(s) were sent */ | |
3b1ab5a3 | 2514 | |
3eb0f9a7 | 2515 | /* |
aa433014 MC |
2516 | * RFC 9000 s. 10.1. 'An endpoint also restarts its idle timer when |
2517 | * sending an ack-eliciting packet if no other ack-eliciting packets | |
2518 | * have been sent since last receiving and processing a packet.' | |
2519 | */ | |
2520 | if (status.sent_ack_eliciting | |
2521 | && !ch->have_sent_ack_eliciting_since_rx) { | |
2522 | ch_update_idle(ch); | |
2523 | ch->have_sent_ack_eliciting_since_rx = 1; | |
2524 | } | |
3eb0f9a7 | 2525 | |
aa433014 MC |
2526 | if (!ch->is_server && status.sent_handshake) |
2527 | /* | |
2528 | * RFC 9001 s. 4.9.1: A client MUST discard Initial keys when it | |
2529 | * first sends a Handshake packet. | |
2530 | */ | |
2531 | ch_discard_el(ch, QUIC_ENC_LEVEL_INITIAL); | |
8a65e7a5 | 2532 | |
aa433014 MC |
2533 | if (ch->rxku_pending_confirm_done) |
2534 | ch->rxku_pending_confirm = 0; | |
5a1b1d2b | 2535 | |
aa433014 MC |
2536 | ch_update_ping_deadline(ch); |
2537 | } | |
2538 | ||
2539 | if (!res) { | |
2540 | /* | |
2541 | * One case where TXP can fail is if we reach a TX PN of 2**62 - 1. | |
2542 | * As per RFC 9000 s. 12.3, if this happens we MUST close the | |
2543 | * connection without sending a CONNECTION_CLOSE frame. This is | |
2544 | * actually handled as an emergent consequence of our design, as the | |
2545 | * TX packetiser will never transmit another packet when the TX PN | |
2546 | * reaches the limit. | |
2547 | * | |
2548 | * Calling the below function terminates the connection; its attempt | |
2549 | * to schedule a CONNECTION_CLOSE frame will not actually cause a | |
2550 | * packet to be transmitted for this reason. | |
2551 | */ | |
2552 | ossl_quic_channel_raise_protocol_error(ch, QUIC_ERR_INTERNAL_ERROR, | |
2553 | 0, | |
2554 | "internal error (txp generate)"); | |
2555 | break; | |
2556 | } | |
2557 | } while (status.sent_pkt > 0); | |
df15e990 HL |
2558 | |
2559 | /* Flush packets to network. */ | |
2560 | switch (ossl_qtx_flush_net(ch->qtx)) { | |
2561 | case QTX_FLUSH_NET_RES_OK: | |
2562 | case QTX_FLUSH_NET_RES_TRANSIENT_FAIL: | |
2563 | /* Best effort, done for now. */ | |
2564 | break; | |
2565 | ||
2566 | case QTX_FLUSH_NET_RES_PERMANENT_FAIL: | |
2567 | default: | |
2568 | /* Permanent underlying network BIO, start terminating. */ | |
2569 | ch_raise_net_error(ch); | |
2570 | break; | |
2571 | } | |
f538b421 | 2572 | |
f538b421 HL |
2573 | return 1; |
2574 | } | |
2575 | ||
2576 | /* Determine next tick deadline. */ | |
2577 | static OSSL_TIME ch_determine_next_tick_deadline(QUIC_CHANNEL *ch) | |
2578 | { | |
2579 | OSSL_TIME deadline; | |
ca711651 | 2580 | int i; |
f538b421 | 2581 | |
c12e1113 | 2582 | if (ossl_quic_channel_is_terminated(ch)) |
df15e990 HL |
2583 | return ossl_time_infinite(); |
2584 | ||
f538b421 HL |
2585 | deadline = ossl_ackm_get_loss_detection_deadline(ch->ackm); |
2586 | if (ossl_time_is_zero(deadline)) | |
2587 | deadline = ossl_time_infinite(); | |
2588 | ||
ca711651 MC |
2589 | /* |
2590 | * If the CC will let us send acks, check the ack deadline for all | |
2591 | * enc_levels that are actually provisioned | |
2592 | */ | |
2593 | if (ch->cc_method->get_tx_allowance(ch->cc_data) > 0) { | |
2594 | for (i = 0; i < QUIC_ENC_LEVEL_NUM; i++) { | |
2595 | if (ossl_qtx_is_enc_level_provisioned(ch->qtx, i)) { | |
2596 | deadline = ossl_time_min(deadline, | |
2597 | ossl_ackm_get_ack_deadline(ch->ackm, | |
2598 | ossl_quic_enc_level_to_pn_space(i))); | |
2599 | } | |
2600 | } | |
098f27f9 MC |
2601 | |
2602 | /* | |
2603 | * When do we need to send an ACK-eliciting packet to reset the idle | |
2604 | * deadline timer for the peer? | |
2605 | */ | |
2606 | if (!ossl_time_is_infinite(ch->ping_deadline)) | |
2607 | deadline = ossl_time_min(deadline, ch->ping_deadline); | |
ca711651 | 2608 | } |
f538b421 | 2609 | |
c206f2aa HL |
2610 | /* Apply TXP wakeup deadline. */ |
2611 | deadline = ossl_time_min(deadline, | |
2612 | ossl_quic_tx_packetiser_get_deadline(ch->txp)); | |
f538b421 HL |
2613 | |
2614 | /* Is the terminating timer armed? */ | |
c12e1113 | 2615 | if (ossl_quic_channel_is_terminating(ch)) |
f538b421 HL |
2616 | deadline = ossl_time_min(deadline, |
2617 | ch->terminate_deadline); | |
2618 | else if (!ossl_time_is_infinite(ch->idle_deadline)) | |
2619 | deadline = ossl_time_min(deadline, | |
2620 | ch->idle_deadline); | |
2621 | ||
8a65e7a5 HL |
2622 | /* When does the RXKU process complete? */ |
2623 | if (ch->rxku_in_progress) | |
2624 | deadline = ossl_time_min(deadline, ch->rxku_update_end_deadline); | |
2625 | ||
f538b421 HL |
2626 | return deadline; |
2627 | } | |
2628 | ||
2629 | /* | |
2630 | * QUIC Channel: Network BIO Configuration | |
2631 | * ======================================= | |
2632 | */ | |
2633 | ||
2634 | /* Determines whether we can support a given poll descriptor. */ | |
2635 | static int validate_poll_descriptor(const BIO_POLL_DESCRIPTOR *d) | |
2636 | { | |
96014840 TM |
2637 | if (d->type == BIO_POLL_DESCRIPTOR_TYPE_SOCK_FD && d->value.fd < 0) { |
2638 | ERR_raise(ERR_LIB_SSL, ERR_R_PASSED_INVALID_ARGUMENT); | |
f538b421 | 2639 | return 0; |
96014840 | 2640 | } |
f538b421 HL |
2641 | |
2642 | return 1; | |
2643 | } | |
2644 | ||
2645 | BIO *ossl_quic_channel_get_net_rbio(QUIC_CHANNEL *ch) | |
2646 | { | |
2647 | return ch->net_rbio; | |
2648 | } | |
2649 | ||
2650 | BIO *ossl_quic_channel_get_net_wbio(QUIC_CHANNEL *ch) | |
2651 | { | |
2652 | return ch->net_wbio; | |
2653 | } | |
2654 | ||
be96180a HL |
2655 | static int ch_update_poll_desc(QUIC_CHANNEL *ch, BIO *net_bio, int for_write) |
2656 | { | |
2657 | BIO_POLL_DESCRIPTOR d = {0}; | |
2658 | ||
2659 | if (net_bio == NULL | |
2660 | || (!for_write && !BIO_get_rpoll_descriptor(net_bio, &d)) | |
2661 | || (for_write && !BIO_get_wpoll_descriptor(net_bio, &d))) | |
2662 | /* Non-pollable BIO */ | |
2663 | d.type = BIO_POLL_DESCRIPTOR_TYPE_NONE; | |
2664 | ||
2665 | if (!validate_poll_descriptor(&d)) | |
2666 | return 0; | |
2667 | ||
2668 | if (for_write) | |
2669 | ossl_quic_reactor_set_poll_w(&ch->rtor, &d); | |
2670 | else | |
2671 | ossl_quic_reactor_set_poll_r(&ch->rtor, &d); | |
2672 | ||
2673 | return 1; | |
2674 | } | |
2675 | ||
2676 | int ossl_quic_channel_update_poll_descriptors(QUIC_CHANNEL *ch) | |
2677 | { | |
2678 | int ok = 1; | |
2679 | ||
2680 | if (!ch_update_poll_desc(ch, ch->net_rbio, /*for_write=*/0)) | |
2681 | ok = 0; | |
2682 | ||
2683 | if (!ch_update_poll_desc(ch, ch->net_wbio, /*for_write=*/1)) | |
2684 | ok = 0; | |
2685 | ||
2686 | return ok; | |
2687 | } | |
2688 | ||
d1ac77b1 HL |
2689 | /* |
2690 | * QUIC_CHANNEL does not ref any BIO it is provided with, nor is any ref | |
2691 | * transferred to it. The caller (i.e., QUIC_CONNECTION) is responsible for | |
2692 | * ensuring the BIO lasts until the channel is freed or the BIO is switched out | |
2693 | * for another BIO by a subsequent successful call to this function. | |
2694 | */ | |
2695 | int ossl_quic_channel_set_net_rbio(QUIC_CHANNEL *ch, BIO *net_rbio) | |
f538b421 | 2696 | { |
f538b421 HL |
2697 | if (ch->net_rbio == net_rbio) |
2698 | return 1; | |
2699 | ||
be96180a HL |
2700 | if (!ch_update_poll_desc(ch, net_rbio, /*for_write=*/0)) |
2701 | return 0; | |
f538b421 | 2702 | |
f538b421 HL |
2703 | ossl_quic_demux_set_bio(ch->demux, net_rbio); |
2704 | ch->net_rbio = net_rbio; | |
2705 | return 1; | |
2706 | } | |
2707 | ||
d1ac77b1 | 2708 | int ossl_quic_channel_set_net_wbio(QUIC_CHANNEL *ch, BIO *net_wbio) |
f538b421 | 2709 | { |
f538b421 HL |
2710 | if (ch->net_wbio == net_wbio) |
2711 | return 1; | |
2712 | ||
be96180a HL |
2713 | if (!ch_update_poll_desc(ch, net_wbio, /*for_write=*/1)) |
2714 | return 0; | |
f538b421 | 2715 | |
f538b421 HL |
2716 | ossl_qtx_set_bio(ch->qtx, net_wbio); |
2717 | ch->net_wbio = net_wbio; | |
2718 | return 1; | |
2719 | } | |
2720 | ||
2721 | /* | |
2722 | * QUIC Channel: Lifecycle Events | |
2723 | * ============================== | |
2724 | */ | |
f538b421 HL |
2725 | int ossl_quic_channel_start(QUIC_CHANNEL *ch) |
2726 | { | |
982dae89 MC |
2727 | uint64_t error_code; |
2728 | const char *error_msg; | |
2729 | ERR_STATE *error_state = NULL; | |
2730 | ||
b1b06da2 HL |
2731 | if (ch->is_server) |
2732 | /* | |
2733 | * This is not used by the server. The server moves to active | |
2734 | * automatically on receiving an incoming connection. | |
2735 | */ | |
2736 | return 0; | |
2737 | ||
f538b421 HL |
2738 | if (ch->state != QUIC_CHANNEL_STATE_IDLE) |
2739 | /* Calls to connect are idempotent */ | |
2740 | return 1; | |
2741 | ||
2742 | /* Inform QTX of peer address. */ | |
2743 | if (!ossl_quic_tx_packetiser_set_peer(ch->txp, &ch->cur_peer_addr)) | |
2744 | return 0; | |
2745 | ||
2746 | /* Plug in secrets for the Initial EL. */ | |
2747 | if (!ossl_quic_provide_initial_secret(ch->libctx, | |
2748 | ch->propq, | |
2749 | &ch->init_dcid, | |
091f532e | 2750 | ch->is_server, |
f538b421 HL |
2751 | ch->qrx, ch->qtx)) |
2752 | return 0; | |
2753 | ||
2754 | /* Change state. */ | |
2755 | ch->state = QUIC_CHANNEL_STATE_ACTIVE; | |
2756 | ch->doing_proactive_ver_neg = 0; /* not currently supported */ | |
2757 | ||
2758 | /* Handshake layer: start (e.g. send CH). */ | |
982dae89 MC |
2759 | ossl_quic_tls_tick(ch->qtls); |
2760 | ||
2761 | if (ossl_quic_tls_get_error(ch->qtls, &error_code, &error_msg, | |
2762 | &error_state)) { | |
2763 | ossl_quic_channel_raise_protocol_error_state(ch, error_code, 0, | |
2764 | error_msg, error_state); | |
f538b421 | 2765 | return 0; |
982dae89 | 2766 | } |
f538b421 | 2767 | |
ccd31037 | 2768 | ossl_quic_reactor_tick(&ch->rtor, 0); /* best effort */ |
f538b421 HL |
2769 | return 1; |
2770 | } | |
2771 | ||
2772 | /* Start a locally initiated connection shutdown. */ | |
40c8c756 HL |
2773 | void ossl_quic_channel_local_close(QUIC_CHANNEL *ch, uint64_t app_error_code, |
2774 | const char *app_reason) | |
f538b421 HL |
2775 | { |
2776 | QUIC_TERMINATE_CAUSE tcause = {0}; | |
2777 | ||
c12e1113 | 2778 | if (ossl_quic_channel_is_term_any(ch)) |
f538b421 HL |
2779 | return; |
2780 | ||
e8043229 HL |
2781 | tcause.app = 1; |
2782 | tcause.error_code = app_error_code; | |
40c8c756 HL |
2783 | tcause.reason = app_reason; |
2784 | tcause.reason_len = app_reason != NULL ? strlen(app_reason) : 0; | |
df15e990 | 2785 | ch_start_terminating(ch, &tcause, 0); |
f538b421 HL |
2786 | } |
2787 | ||
2788 | static void free_token(const unsigned char *buf, size_t buf_len, void *arg) | |
2789 | { | |
2790 | OPENSSL_free((unsigned char *)buf); | |
2791 | } | |
2792 | ||
2793 | /* Called when a server asks us to do a retry. */ | |
2794 | static int ch_retry(QUIC_CHANNEL *ch, | |
2795 | const unsigned char *retry_token, | |
2796 | size_t retry_token_len, | |
2797 | const QUIC_CONN_ID *retry_scid) | |
2798 | { | |
2799 | void *buf; | |
2800 | ||
212616ed HL |
2801 | /* |
2802 | * RFC 9000 s. 17.2.5.1: "A client MUST discard a Retry packet that contains | |
2803 | * a SCID field that is identical to the DCID field of its initial packet." | |
2804 | */ | |
2805 | if (ossl_quic_conn_id_eq(&ch->init_dcid, retry_scid)) | |
96014840 | 2806 | return 1; |
212616ed | 2807 | |
f538b421 HL |
2808 | /* We change to using the SCID in the Retry packet as the DCID. */ |
2809 | if (!ossl_quic_tx_packetiser_set_cur_dcid(ch->txp, retry_scid)) | |
2810 | return 0; | |
2811 | ||
2812 | /* | |
2813 | * Now we retry. We will release the Retry packet immediately, so copy | |
2814 | * the token. | |
2815 | */ | |
e28f512f | 2816 | if ((buf = OPENSSL_memdup(retry_token, retry_token_len)) == NULL) |
f538b421 HL |
2817 | return 0; |
2818 | ||
f538b421 HL |
2819 | ossl_quic_tx_packetiser_set_initial_token(ch->txp, buf, retry_token_len, |
2820 | free_token, NULL); | |
2821 | ||
2822 | ch->retry_scid = *retry_scid; | |
2823 | ch->doing_retry = 1; | |
2824 | ||
2825 | /* | |
2826 | * We need to stimulate the Initial EL to generate the first CRYPTO frame | |
2827 | * again. We can do this most cleanly by simply forcing the ACKM to consider | |
2828 | * the first Initial packet as lost, which it effectively was as the server | |
2829 | * hasn't processed it. This also maintains the desired behaviour with e.g. | |
2830 | * PNs not resetting and so on. | |
2831 | * | |
2832 | * The PN we used initially is always zero, because QUIC does not allow | |
2833 | * repeated retries. | |
2834 | */ | |
2835 | if (!ossl_ackm_mark_packet_pseudo_lost(ch->ackm, QUIC_PN_SPACE_INITIAL, | |
2836 | /*PN=*/0)) | |
2837 | return 0; | |
2838 | ||
2839 | /* | |
2840 | * Plug in new secrets for the Initial EL. This is the only time we change | |
2841 | * the secrets for an EL after we already provisioned it. | |
2842 | */ | |
2843 | if (!ossl_quic_provide_initial_secret(ch->libctx, | |
2844 | ch->propq, | |
2845 | &ch->retry_scid, | |
2846 | /*is_server=*/0, | |
2847 | ch->qrx, ch->qtx)) | |
2848 | return 0; | |
2849 | ||
2850 | return 1; | |
2851 | } | |
2852 | ||
2853 | /* Called when an EL is to be discarded. */ | |
2854 | static int ch_discard_el(QUIC_CHANNEL *ch, | |
2855 | uint32_t enc_level) | |
2856 | { | |
2857 | if (!ossl_assert(enc_level < QUIC_ENC_LEVEL_1RTT)) | |
2858 | return 0; | |
2859 | ||
2860 | if ((ch->el_discarded & (1U << enc_level)) != 0) | |
2861 | /* Already done. */ | |
2862 | return 1; | |
2863 | ||
2864 | /* Best effort for all of these. */ | |
2865 | ossl_quic_tx_packetiser_discard_enc_level(ch->txp, enc_level); | |
2866 | ossl_qrx_discard_enc_level(ch->qrx, enc_level); | |
2867 | ossl_qtx_discard_enc_level(ch->qtx, enc_level); | |
2868 | ||
2869 | if (enc_level != QUIC_ENC_LEVEL_0RTT) { | |
2870 | uint32_t pn_space = ossl_quic_enc_level_to_pn_space(enc_level); | |
2871 | ||
2872 | ossl_ackm_on_pkt_space_discarded(ch->ackm, pn_space); | |
2873 | ||
2874 | /* We should still have crypto streams at this point. */ | |
79534440 HL |
2875 | if (!ossl_assert(ch->crypto_send[pn_space] != NULL) |
2876 | || !ossl_assert(ch->crypto_recv[pn_space] != NULL)) | |
2877 | return 0; | |
f538b421 HL |
2878 | |
2879 | /* Get rid of the crypto stream state for the EL. */ | |
2880 | ossl_quic_sstream_free(ch->crypto_send[pn_space]); | |
2881 | ch->crypto_send[pn_space] = NULL; | |
2882 | ||
2883 | ossl_quic_rstream_free(ch->crypto_recv[pn_space]); | |
2884 | ch->crypto_recv[pn_space] = NULL; | |
2885 | } | |
2886 | ||
2887 | ch->el_discarded |= (1U << enc_level); | |
2888 | return 1; | |
2889 | } | |
2890 | ||
2891 | /* Intended to be called by the RXDP. */ | |
2892 | int ossl_quic_channel_on_handshake_confirmed(QUIC_CHANNEL *ch) | |
2893 | { | |
2894 | if (ch->handshake_confirmed) | |
2895 | return 1; | |
2896 | ||
2897 | if (!ch->handshake_complete) { | |
2898 | /* | |
2899 | * Does not make sense for handshake to be confirmed before it is | |
2900 | * completed. | |
2901 | */ | |
2902 | ossl_quic_channel_raise_protocol_error(ch, QUIC_ERR_PROTOCOL_VIOLATION, | |
2903 | OSSL_QUIC_FRAME_TYPE_HANDSHAKE_DONE, | |
2904 | "handshake cannot be confirmed " | |
2905 | "before it is completed"); | |
2906 | return 0; | |
2907 | } | |
2908 | ||
2909 | ch_discard_el(ch, QUIC_ENC_LEVEL_HANDSHAKE); | |
2910 | ch->handshake_confirmed = 1; | |
29a541fe | 2911 | ossl_ackm_on_handshake_confirmed(ch->ackm); |
f538b421 HL |
2912 | return 1; |
2913 | } | |
2914 | ||
2915 | /* | |
2916 | * Master function used when we want to start tearing down a connection: | |
2917 | * | |
2918 | * - If the connection is still IDLE we can go straight to TERMINATED; | |
2919 | * | |
2920 | * - If we are already TERMINATED this is a no-op. | |
2921 | * | |
2922 | * - If we are TERMINATING - CLOSING and we have now got a CONNECTION_CLOSE | |
9bbc5b54 | 2923 | * from the peer (tcause->remote == 1), we move to TERMINATING - DRAINING. |
f538b421 HL |
2924 | * |
2925 | * - If we are TERMINATING - DRAINING, we remain here until the terminating | |
2926 | * timer expires. | |
2927 | * | |
2928 | * - Otherwise, we are in ACTIVE and move to TERMINATING - CLOSING. | |
2929 | * if we caused the termination (e.g. we have sent a CONNECTION_CLOSE). Note | |
2930 | * that we are considered to have caused a termination if we sent the first | |
2931 | * CONNECTION_CLOSE frame, even if it is caused by a peer protocol | |
2932 | * violation. If the peer sent the first CONNECTION_CLOSE frame, we move to | |
2933 | * TERMINATING - DRAINING. | |
2934 | * | |
2935 | * We record the termination cause structure passed on the first call only. | |
2936 | * Any successive calls have their termination cause data discarded; | |
2937 | * once we start sending a CONNECTION_CLOSE frame, we don't change the details | |
2938 | * in it. | |
6b3b5f9d P |
2939 | * |
2940 | * This conforms to RFC 9000 s. 10.2.1: Closing Connection State: | |
2941 | * To minimize the state that an endpoint maintains for a closing | |
2942 | * connection, endpoints MAY send the exact same packet in response | |
2943 | * to any received packet. | |
2944 | * | |
2945 | * We don't drop any connection state (specifically packet protection keys) | |
2946 | * even though we are permitted to. This conforms to RFC 9000 s. 10.2.1: | |
2947 | * Closing Connection State: | |
2948 | * An endpoint MAY retain packet protection keys for incoming | |
2949 | * packets to allow it to read and process a CONNECTION_CLOSE frame. | |
2950 | * | |
2951 | * Note that we do not conform to these two from the same section: | |
2952 | * An endpoint's selected connection ID and the QUIC version | |
2953 | * are sufficient information to identify packets for a closing | |
2954 | * connection; the endpoint MAY discard all other connection state. | |
2955 | * and: | |
2956 | * An endpoint MAY drop packet protection keys when entering the | |
2957 | * closing state and send a packet containing a CONNECTION_CLOSE | |
2958 | * frame in response to any UDP datagram that is received. | |
f538b421 | 2959 | */ |
40c8c756 HL |
2960 | static void copy_tcause(QUIC_TERMINATE_CAUSE *dst, |
2961 | const QUIC_TERMINATE_CAUSE *src) | |
2962 | { | |
2963 | dst->error_code = src->error_code; | |
2964 | dst->frame_type = src->frame_type; | |
2965 | dst->app = src->app; | |
2966 | dst->remote = src->remote; | |
2967 | ||
2968 | dst->reason = NULL; | |
2969 | dst->reason_len = 0; | |
2970 | ||
2971 | if (src->reason != NULL && src->reason_len > 0) { | |
2972 | size_t l = src->reason_len; | |
2973 | char *r; | |
2974 | ||
2975 | if (l >= SIZE_MAX) | |
2976 | --l; | |
2977 | ||
2978 | /* | |
2979 | * If this fails, dst->reason becomes NULL and we simply do not use a | |
2980 | * reason. This ensures termination is infallible. | |
2981 | */ | |
2982 | dst->reason = r = OPENSSL_memdup(src->reason, l + 1); | |
2983 | if (r == NULL) | |
2984 | return; | |
2985 | ||
2986 | r[l] = '\0'; | |
2987 | dst->reason_len = l; | |
2988 | } | |
2989 | } | |
2990 | ||
f538b421 | 2991 | static void ch_start_terminating(QUIC_CHANNEL *ch, |
df15e990 HL |
2992 | const QUIC_TERMINATE_CAUSE *tcause, |
2993 | int force_immediate) | |
f538b421 | 2994 | { |
549d0a70 HL |
2995 | /* No point sending anything if we haven't sent anything yet. */ |
2996 | if (!ch->have_sent_any_pkt) | |
2997 | force_immediate = 1; | |
2998 | ||
f538b421 | 2999 | switch (ch->state) { |
75b2920a HL |
3000 | default: |
3001 | case QUIC_CHANNEL_STATE_IDLE: | |
40c8c756 | 3002 | copy_tcause(&ch->terminate_cause, tcause); |
75b2920a HL |
3003 | ch_on_terminating_timeout(ch); |
3004 | break; | |
3005 | ||
3006 | case QUIC_CHANNEL_STATE_ACTIVE: | |
40c8c756 | 3007 | copy_tcause(&ch->terminate_cause, tcause); |
df15e990 HL |
3008 | |
3009 | if (!force_immediate) { | |
3010 | ch->state = tcause->remote ? QUIC_CHANNEL_STATE_TERMINATING_DRAINING | |
3011 | : QUIC_CHANNEL_STATE_TERMINATING_CLOSING; | |
a441d08b P |
3012 | /* |
3013 | * RFC 9000 s. 10.2 Immediate Close | |
3014 | * These states SHOULD persist for at least three times | |
3015 | * the current PTO interval as defined in [QUIC-RECOVERY]. | |
3016 | */ | |
df15e990 | 3017 | ch->terminate_deadline |
b212d554 | 3018 | = ossl_time_add(get_time(ch), |
df15e990 HL |
3019 | ossl_time_multiply(ossl_ackm_get_pto_duration(ch->ackm), |
3020 | 3)); | |
3021 | ||
3022 | if (!tcause->remote) { | |
3023 | OSSL_QUIC_FRAME_CONN_CLOSE f = {0}; | |
3024 | ||
3025 | /* best effort */ | |
3026 | f.error_code = ch->terminate_cause.error_code; | |
3027 | f.frame_type = ch->terminate_cause.frame_type; | |
3028 | f.is_app = ch->terminate_cause.app; | |
40c8c756 HL |
3029 | f.reason = (char *)ch->terminate_cause.reason; |
3030 | f.reason_len = ch->terminate_cause.reason_len; | |
df15e990 | 3031 | ossl_quic_tx_packetiser_schedule_conn_close(ch->txp, &f); |
afe4a797 P |
3032 | /* |
3033 | * RFC 9000 s. 10.2.2 Draining Connection State: | |
3034 | * An endpoint that receives a CONNECTION_CLOSE frame MAY | |
3035 | * send a single packet containing a CONNECTION_CLOSE | |
3036 | * frame before entering the draining state, using a | |
3037 | * NO_ERROR code if appropriate | |
3038 | */ | |
df15e990 HL |
3039 | ch->conn_close_queued = 1; |
3040 | } | |
3041 | } else { | |
3042 | ch_on_terminating_timeout(ch); | |
75b2920a HL |
3043 | } |
3044 | break; | |
f538b421 | 3045 | |
75b2920a | 3046 | case QUIC_CHANNEL_STATE_TERMINATING_CLOSING: |
df15e990 HL |
3047 | if (force_immediate) |
3048 | ch_on_terminating_timeout(ch); | |
3049 | else if (tcause->remote) | |
afe4a797 P |
3050 | /* |
3051 | * RFC 9000 s. 10.2.2 Draining Connection State: | |
3052 | * An endpoint MAY enter the draining state from the | |
3053 | * closing state if it receives a CONNECTION_CLOSE frame, | |
3054 | * which indicates that the peer is also closing or draining. | |
3055 | */ | |
75b2920a | 3056 | ch->state = QUIC_CHANNEL_STATE_TERMINATING_DRAINING; |
f538b421 | 3057 | |
75b2920a | 3058 | break; |
f538b421 | 3059 | |
75b2920a | 3060 | case QUIC_CHANNEL_STATE_TERMINATING_DRAINING: |
df15e990 HL |
3061 | /* |
3062 | * Other than in the force-immediate case, we remain here until the | |
eb4129e1 | 3063 | * timeout expires. |
df15e990 HL |
3064 | */ |
3065 | if (force_immediate) | |
3066 | ch_on_terminating_timeout(ch); | |
3067 | ||
75b2920a | 3068 | break; |
f538b421 | 3069 | |
75b2920a HL |
3070 | case QUIC_CHANNEL_STATE_TERMINATED: |
3071 | /* No-op. */ | |
3072 | break; | |
f538b421 HL |
3073 | } |
3074 | } | |
3075 | ||
3076 | /* For RXDP use. */ | |
3077 | void ossl_quic_channel_on_remote_conn_close(QUIC_CHANNEL *ch, | |
3078 | OSSL_QUIC_FRAME_CONN_CLOSE *f) | |
3079 | { | |
3080 | QUIC_TERMINATE_CAUSE tcause = {0}; | |
3081 | ||
3082 | if (!ossl_quic_channel_is_active(ch)) | |
3083 | return; | |
3084 | ||
3085 | tcause.remote = 1; | |
3086 | tcause.app = f->is_app; | |
3087 | tcause.error_code = f->error_code; | |
3088 | tcause.frame_type = f->frame_type; | |
40c8c756 HL |
3089 | tcause.reason = f->reason; |
3090 | tcause.reason_len = f->reason_len; | |
df15e990 HL |
3091 | ch_start_terminating(ch, &tcause, 0); |
3092 | } | |
3093 | ||
eff04652 TM |
3094 | static void free_frame_data(unsigned char *buf, size_t buf_len, void *arg) |
3095 | { | |
3096 | OPENSSL_free(buf); | |
3097 | } | |
3098 | ||
3099 | static int ch_enqueue_retire_conn_id(QUIC_CHANNEL *ch, uint64_t seq_num) | |
3100 | { | |
96014840 | 3101 | BUF_MEM *buf_mem = NULL; |
eff04652 TM |
3102 | WPACKET wpkt; |
3103 | size_t l; | |
3104 | ||
cdd91631 P |
3105 | chan_remove_reset_token(ch, seq_num); |
3106 | ||
eff04652 | 3107 | if ((buf_mem = BUF_MEM_new()) == NULL) |
96014840 | 3108 | goto err; |
eff04652 TM |
3109 | |
3110 | if (!WPACKET_init(&wpkt, buf_mem)) | |
3111 | goto err; | |
3112 | ||
3113 | if (!ossl_quic_wire_encode_frame_retire_conn_id(&wpkt, seq_num)) { | |
3114 | WPACKET_cleanup(&wpkt); | |
3115 | goto err; | |
3116 | } | |
3117 | ||
3118 | WPACKET_finish(&wpkt); | |
3119 | if (!WPACKET_get_total_written(&wpkt, &l)) | |
3120 | goto err; | |
3121 | ||
3122 | if (ossl_quic_cfq_add_frame(ch->cfq, 1, QUIC_PN_SPACE_APP, | |
371c2958 | 3123 | OSSL_QUIC_FRAME_TYPE_RETIRE_CONN_ID, 0, |
eff04652 TM |
3124 | (unsigned char *)buf_mem->data, l, |
3125 | free_frame_data, NULL) == NULL) | |
3126 | goto err; | |
3127 | ||
3128 | buf_mem->data = NULL; | |
3129 | BUF_MEM_free(buf_mem); | |
3130 | return 1; | |
3131 | ||
3132 | err: | |
3133 | ossl_quic_channel_raise_protocol_error(ch, | |
3134 | QUIC_ERR_INTERNAL_ERROR, | |
3135 | OSSL_QUIC_FRAME_TYPE_NEW_CONN_ID, | |
3136 | "internal error enqueueing retire conn id"); | |
3137 | BUF_MEM_free(buf_mem); | |
3138 | return 0; | |
3139 | } | |
3140 | ||
3141 | void ossl_quic_channel_on_new_conn_id(QUIC_CHANNEL *ch, | |
3142 | OSSL_QUIC_FRAME_NEW_CONN_ID *f) | |
3143 | { | |
3144 | uint64_t new_remote_seq_num = ch->cur_remote_seq_num; | |
3145 | uint64_t new_retire_prior_to = ch->cur_retire_prior_to; | |
3146 | ||
3147 | if (!ossl_quic_channel_is_active(ch)) | |
3148 | return; | |
3149 | ||
3150 | /* We allow only two active connection ids; first check some constraints */ | |
eff04652 TM |
3151 | if (ch->cur_remote_dcid.id_len == 0) { |
3152 | /* Changing from 0 length connection id is disallowed */ | |
3153 | ossl_quic_channel_raise_protocol_error(ch, | |
3154 | QUIC_ERR_PROTOCOL_VIOLATION, | |
3155 | OSSL_QUIC_FRAME_TYPE_NEW_CONN_ID, | |
3156 | "zero length connection id in use"); | |
3157 | ||
3158 | return; | |
3159 | } | |
3160 | ||
3161 | if (f->seq_num > new_remote_seq_num) | |
3162 | new_remote_seq_num = f->seq_num; | |
3163 | if (f->retire_prior_to > new_retire_prior_to) | |
3164 | new_retire_prior_to = f->retire_prior_to; | |
3165 | ||
985429f4 P |
3166 | /* |
3167 | * RFC 9000-5.1.1: An endpoint MUST NOT provide more connection IDs | |
3168 | * than the peer's limit. | |
3169 | * | |
3170 | * After processing a NEW_CONNECTION_ID frame and adding and retiring | |
3171 | * active connection IDs, if the number of active connection IDs exceeds | |
3172 | * the value advertised in its active_connection_id_limit transport | |
3173 | * parameter, an endpoint MUST close the connection with an error of | |
3174 | * type CONNECTION_ID_LIMIT_ERROR. | |
3175 | */ | |
3176 | if (new_remote_seq_num - new_retire_prior_to > 1) { | |
eff04652 TM |
3177 | ossl_quic_channel_raise_protocol_error(ch, |
3178 | QUIC_ERR_CONNECTION_ID_LIMIT_ERROR, | |
3179 | OSSL_QUIC_FRAME_TYPE_NEW_CONN_ID, | |
3180 | "active_connection_id limit violated"); | |
985429f4 P |
3181 | return; |
3182 | } | |
3183 | ||
3184 | /* | |
3185 | * RFC 9000-5.1.1: An endpoint MAY send connection IDs that temporarily | |
3186 | * exceed a peer's limit if the NEW_CONNECTION_ID frame also requires | |
3187 | * the retirement of any excess, by including a sufficiently large | |
3188 | * value in the Retire Prior To field. | |
3189 | * | |
3190 | * RFC 9000-5.1.2: An endpoint SHOULD allow for sending and tracking | |
3191 | * a number of RETIRE_CONNECTION_ID frames of at least twice the value | |
3192 | * of the active_connection_id_limit transport parameter. An endpoint | |
3193 | * MUST NOT forget a connection ID without retiring it, though it MAY | |
3194 | * choose to treat having connection IDs in need of retirement that | |
3195 | * exceed this limit as a connection error of type CONNECTION_ID_LIMIT_ERROR. | |
3196 | * | |
3197 | * We are a little bit more liberal than the minimum mandated. | |
3198 | */ | |
3199 | if (new_retire_prior_to - ch->cur_retire_prior_to > 10) { | |
3200 | ossl_quic_channel_raise_protocol_error(ch, | |
3201 | QUIC_ERR_CONNECTION_ID_LIMIT_ERROR, | |
3202 | OSSL_QUIC_FRAME_TYPE_NEW_CONN_ID, | |
3203 | "retiring connection id limit violated"); | |
eff04652 TM |
3204 | |
3205 | return; | |
3206 | } | |
3207 | ||
3208 | if (new_remote_seq_num > ch->cur_remote_seq_num) { | |
cdd91631 P |
3209 | /* Add new stateless reset token */ |
3210 | if (!chan_add_reset_token(ch, f->stateless_reset.token, | |
3211 | new_remote_seq_num)) { | |
3212 | ossl_quic_channel_raise_protocol_error( | |
3213 | ch, QUIC_ERR_CONNECTION_ID_LIMIT_ERROR, | |
3214 | OSSL_QUIC_FRAME_TYPE_NEW_CONN_ID, | |
3215 | "unable to store stateless reset token"); | |
3216 | ||
3217 | return; | |
3218 | } | |
eff04652 TM |
3219 | ch->cur_remote_seq_num = new_remote_seq_num; |
3220 | ch->cur_remote_dcid = f->conn_id; | |
3221 | ossl_quic_tx_packetiser_set_cur_dcid(ch->txp, &ch->cur_remote_dcid); | |
3222 | } | |
5cc73695 | 3223 | |
985429f4 P |
3224 | /* |
3225 | * RFC 9000-5.1.2: Upon receipt of an increased Retire Prior To | |
3226 | * field, the peer MUST stop using the corresponding connection IDs | |
3227 | * and retire them with RETIRE_CONNECTION_ID frames before adding the | |
3228 | * newly provided connection ID to the set of active connection IDs. | |
3229 | */ | |
5cc73695 HL |
3230 | |
3231 | /* | |
3232 | * Note: RFC 9000 s. 19.15 says: | |
3233 | * "An endpoint that receives a NEW_CONNECTION_ID frame with a sequence | |
3234 | * number smaller than the Retire Prior To field of a previously received | |
7c793cd3 | 3235 | * NEW_CONNECTION_ID frame MUST send a corresponding |
5cc73695 HL |
3236 | * RETIRE_CONNECTION_ID frame that retires the newly received connection |
3237 | * ID, unless it has already done so for that sequence number." | |
3238 | * | |
3239 | * Since we currently always queue RETIRE_CONN_ID frames based on the Retire | |
3240 | * Prior To field of a NEW_CONNECTION_ID frame immediately upon receiving | |
3241 | * that NEW_CONNECTION_ID frame, by definition this will always be met. | |
3242 | * This may change in future when we change our CID handling. | |
3243 | */ | |
eff04652 TM |
3244 | while (new_retire_prior_to > ch->cur_retire_prior_to) { |
3245 | if (!ch_enqueue_retire_conn_id(ch, ch->cur_retire_prior_to)) | |
3246 | break; | |
3247 | ++ch->cur_retire_prior_to; | |
3248 | } | |
3249 | } | |
3250 | ||
9c3ea4e1 TM |
3251 | static void ch_save_err_state(QUIC_CHANNEL *ch) |
3252 | { | |
3253 | if (ch->err_state == NULL) | |
3254 | ch->err_state = OSSL_ERR_STATE_new(); | |
3255 | ||
3256 | if (ch->err_state == NULL) | |
3257 | return; | |
3258 | ||
3259 | OSSL_ERR_STATE_save(ch->err_state); | |
3260 | } | |
3261 | ||
cdd91631 P |
3262 | static void ch_stateless_reset(QUIC_CHANNEL *ch) |
3263 | { | |
3264 | QUIC_TERMINATE_CAUSE tcause = {0}; | |
3265 | ||
3266 | tcause.error_code = QUIC_ERR_NO_ERROR; | |
3267 | ch_start_terminating(ch, &tcause, 1); | |
3268 | } | |
3269 | ||
df15e990 HL |
3270 | static void ch_raise_net_error(QUIC_CHANNEL *ch) |
3271 | { | |
3272 | QUIC_TERMINATE_CAUSE tcause = {0}; | |
3273 | ||
5c3474ea | 3274 | ch->net_error = 1; |
741170be HL |
3275 | |
3276 | ERR_raise_data(ERR_LIB_SSL, SSL_R_QUIC_NETWORK_ERROR, | |
3277 | "connection terminated due to network error"); | |
9c3ea4e1 | 3278 | ch_save_err_state(ch); |
5c3474ea | 3279 | |
df15e990 HL |
3280 | tcause.error_code = QUIC_ERR_INTERNAL_ERROR; |
3281 | ||
3282 | /* | |
3283 | * Skip Terminating state and go directly to Terminated, no point trying to | |
3284 | * send CONNECTION_CLOSE if we cannot communicate. | |
3285 | */ | |
3286 | ch_start_terminating(ch, &tcause, 1); | |
f538b421 HL |
3287 | } |
3288 | ||
5c3474ea TM |
3289 | int ossl_quic_channel_net_error(QUIC_CHANNEL *ch) |
3290 | { | |
3291 | return ch->net_error; | |
3292 | } | |
3293 | ||
9c3ea4e1 TM |
3294 | void ossl_quic_channel_restore_err_state(QUIC_CHANNEL *ch) |
3295 | { | |
3296 | if (ch == NULL) | |
3297 | return; | |
3298 | ||
3299 | OSSL_ERR_STATE_restore(ch->err_state); | |
3300 | } | |
3301 | ||
741170be HL |
3302 | void ossl_quic_channel_raise_protocol_error_loc(QUIC_CHANNEL *ch, |
3303 | uint64_t error_code, | |
3304 | uint64_t frame_type, | |
3305 | const char *reason, | |
7a2bb210 | 3306 | ERR_STATE *err_state, |
741170be HL |
3307 | const char *src_file, |
3308 | int src_line, | |
3309 | const char *src_func) | |
f538b421 HL |
3310 | { |
3311 | QUIC_TERMINATE_CAUSE tcause = {0}; | |
2b8126d8 TM |
3312 | int err_reason = error_code == QUIC_ERR_INTERNAL_ERROR |
3313 | ? ERR_R_INTERNAL_ERROR : SSL_R_QUIC_PROTOCOL_ERROR; | |
741170be HL |
3314 | const char *err_str = ossl_quic_err_to_string(error_code); |
3315 | const char *err_str_pfx = " (", *err_str_sfx = ")"; | |
3316 | const char *ft_str = NULL; | |
3317 | const char *ft_str_pfx = " (", *ft_str_sfx = ")"; | |
3318 | ||
549d0a70 HL |
3319 | if (ch->protocol_error) |
3320 | /* Only the first call to this function matters. */ | |
3321 | return; | |
3322 | ||
741170be HL |
3323 | if (err_str == NULL) { |
3324 | err_str = ""; | |
3325 | err_str_pfx = ""; | |
3326 | err_str_sfx = ""; | |
3327 | } | |
3328 | ||
7a2bb210 HL |
3329 | /* |
3330 | * If we were provided an underlying error state, restore it and then append | |
3331 | * our ERR on top as a "cover letter" error. | |
3332 | */ | |
3333 | if (err_state != NULL) | |
3334 | OSSL_ERR_STATE_restore(err_state); | |
3335 | ||
741170be HL |
3336 | if (frame_type != 0) { |
3337 | ft_str = ossl_quic_frame_type_to_string(frame_type); | |
3338 | if (ft_str == NULL) { | |
3339 | ft_str = ""; | |
3340 | ft_str_pfx = ""; | |
3341 | ft_str_sfx = ""; | |
3342 | } | |
3343 | ||
3344 | ERR_raise_data(ERR_LIB_SSL, err_reason, | |
3345 | "QUIC error code: 0x%llx%s%s%s " | |
3346 | "(triggered by frame type: 0x%llx%s%s%s), reason: \"%s\"", | |
3347 | (unsigned long long) error_code, | |
3348 | err_str_pfx, err_str, err_str_sfx, | |
3349 | (unsigned long long) frame_type, | |
3350 | ft_str_pfx, ft_str, ft_str_sfx, | |
3351 | reason); | |
3352 | } else { | |
3353 | ERR_raise_data(ERR_LIB_SSL, err_reason, | |
3354 | "QUIC error code: 0x%llx%s%s%s, reason: \"%s\"", | |
3355 | (unsigned long long) error_code, | |
3356 | err_str_pfx, err_str, err_str_sfx, | |
3357 | reason); | |
3358 | } | |
3359 | ||
3360 | if (src_file != NULL) | |
3361 | ERR_set_debug(src_file, src_line, src_func); | |
f538b421 | 3362 | |
2b8126d8 | 3363 | ch_save_err_state(ch); |
9c3ea4e1 | 3364 | |
f538b421 HL |
3365 | tcause.error_code = error_code; |
3366 | tcause.frame_type = frame_type; | |
40c8c756 | 3367 | tcause.reason = reason; |
f2609004 | 3368 | tcause.reason_len = strlen(reason); |
f538b421 | 3369 | |
549d0a70 | 3370 | ch->protocol_error = 1; |
df15e990 | 3371 | ch_start_terminating(ch, &tcause, 0); |
f538b421 HL |
3372 | } |
3373 | ||
3374 | /* | |
3375 | * Called once the terminating timer expires, meaning we move from TERMINATING | |
3376 | * to TERMINATED. | |
3377 | */ | |
3378 | static void ch_on_terminating_timeout(QUIC_CHANNEL *ch) | |
3379 | { | |
3380 | ch->state = QUIC_CHANNEL_STATE_TERMINATED; | |
3381 | } | |
3382 | ||
3383 | /* | |
3384 | * Updates our idle deadline. Called when an event happens which should bump the | |
3385 | * idle timeout. | |
3386 | */ | |
3387 | static void ch_update_idle(QUIC_CHANNEL *ch) | |
3388 | { | |
3389 | if (ch->max_idle_timeout == 0) | |
3390 | ch->idle_deadline = ossl_time_infinite(); | |
b056e9fc P |
3391 | else { |
3392 | /* RFC 9000 s. 10.1: Idle Timeout | |
3393 | * To avoid excessively small idle timeout periods, endpoints | |
3394 | * MUST increase the idle timeout period to be at least three | |
3395 | * times the current Probe Timeout (PTO). This allows for | |
3396 | * multiple PTOs to expire, and therefore multiple probes to | |
3397 | * be sent and lost, prior to idle timeout. | |
3398 | */ | |
3399 | OSSL_TIME pto = ossl_ackm_get_pto_duration(ch->ackm); | |
3400 | OSSL_TIME timeout = ossl_time_max(ossl_ms2time(ch->max_idle_timeout), | |
3401 | ossl_time_multiply(pto, 3)); | |
3402 | ||
3403 | ch->idle_deadline = ossl_time_add(get_time(ch), timeout); | |
3404 | } | |
f538b421 HL |
3405 | } |
3406 | ||
3b1ab5a3 HL |
3407 | /* |
3408 | * Updates our ping deadline, which determines when we next generate a ping if | |
3409 | * we don't have any other ACK-eliciting frames to send. | |
3410 | */ | |
3411 | static void ch_update_ping_deadline(QUIC_CHANNEL *ch) | |
3412 | { | |
3413 | if (ch->max_idle_timeout > 0) { | |
3414 | /* | |
9cf091a3 HL |
3415 | * Maximum amount of time without traffic before we send a PING to keep |
3416 | * the connection open. Usually we use max_idle_timeout/2, but ensure | |
3417 | * the period never exceeds the assumed NAT interval to ensure NAT | |
3418 | * devices don't have their state time out (RFC 9000 s. 10.1.2). | |
3b1ab5a3 HL |
3419 | */ |
3420 | OSSL_TIME max_span | |
3421 | = ossl_time_divide(ossl_ms2time(ch->max_idle_timeout), 2); | |
3422 | ||
9cf091a3 | 3423 | max_span = ossl_time_min(max_span, MAX_NAT_INTERVAL); |
3b1ab5a3 HL |
3424 | |
3425 | ch->ping_deadline = ossl_time_add(get_time(ch), max_span); | |
3426 | } else { | |
3427 | ch->ping_deadline = ossl_time_infinite(); | |
3428 | } | |
3429 | } | |
3430 | ||
f538b421 HL |
3431 | /* Called when the idle timeout expires. */ |
3432 | static void ch_on_idle_timeout(QUIC_CHANNEL *ch) | |
3433 | { | |
3434 | /* | |
3435 | * Idle timeout does not have an error code associated with it because a | |
3436 | * CONN_CLOSE is never sent for it. We shouldn't use this data once we reach | |
3437 | * TERMINATED anyway. | |
3438 | */ | |
3439 | ch->terminate_cause.app = 0; | |
3440 | ch->terminate_cause.error_code = UINT64_MAX; | |
3441 | ch->terminate_cause.frame_type = 0; | |
3442 | ||
3443 | ch->state = QUIC_CHANNEL_STATE_TERMINATED; | |
3444 | } | |
b1b06da2 HL |
3445 | |
3446 | /* Called when we, as a server, get a new incoming connection. */ | |
3447 | static int ch_server_on_new_conn(QUIC_CHANNEL *ch, const BIO_ADDR *peer, | |
3448 | const QUIC_CONN_ID *peer_scid, | |
3449 | const QUIC_CONN_ID *peer_dcid) | |
3450 | { | |
3451 | if (!ossl_assert(ch->state == QUIC_CHANNEL_STATE_IDLE && ch->is_server)) | |
3452 | return 0; | |
3453 | ||
3454 | /* Generate a SCID we will use for the connection. */ | |
3455 | if (!gen_rand_conn_id(ch->libctx, INIT_DCID_LEN, | |
bbc97540 | 3456 | &ch->cur_local_cid)) |
b1b06da2 HL |
3457 | return 0; |
3458 | ||
3459 | /* Note our newly learnt peer address and CIDs. */ | |
3460 | ch->cur_peer_addr = *peer; | |
3461 | ch->init_dcid = *peer_dcid; | |
3462 | ch->cur_remote_dcid = *peer_scid; | |
3463 | ||
3464 | /* Inform QTX of peer address. */ | |
3465 | if (!ossl_quic_tx_packetiser_set_peer(ch->txp, &ch->cur_peer_addr)) | |
3466 | return 0; | |
3467 | ||
3468 | /* Inform TXP of desired CIDs. */ | |
3469 | if (!ossl_quic_tx_packetiser_set_cur_dcid(ch->txp, &ch->cur_remote_dcid)) | |
3470 | return 0; | |
3471 | ||
bbc97540 | 3472 | if (!ossl_quic_tx_packetiser_set_cur_scid(ch->txp, &ch->cur_local_cid)) |
b1b06da2 HL |
3473 | return 0; |
3474 | ||
3475 | /* Plug in secrets for the Initial EL. */ | |
3476 | if (!ossl_quic_provide_initial_secret(ch->libctx, | |
3477 | ch->propq, | |
3478 | &ch->init_dcid, | |
3479 | /*is_server=*/1, | |
3480 | ch->qrx, ch->qtx)) | |
3481 | return 0; | |
3482 | ||
bbc97540 TM |
3483 | /* Register our local CID in the DEMUX. */ |
3484 | if (!ossl_qrx_add_dst_conn_id(ch->qrx, &ch->cur_local_cid)) | |
b1b06da2 HL |
3485 | return 0; |
3486 | ||
3487 | /* Change state. */ | |
3488 | ch->state = QUIC_CHANNEL_STATE_ACTIVE; | |
3489 | ch->doing_proactive_ver_neg = 0; /* not currently supported */ | |
3490 | return 1; | |
3491 | } | |
d03fe5de MC |
3492 | |
3493 | SSL *ossl_quic_channel_get0_ssl(QUIC_CHANNEL *ch) | |
3494 | { | |
3495 | return ch->tls; | |
3496 | } | |
2dbc39de | 3497 | |
e8fe7a21 HL |
3498 | static int ch_init_new_stream(QUIC_CHANNEL *ch, QUIC_STREAM *qs, |
3499 | int can_send, int can_recv) | |
3500 | { | |
3501 | uint64_t rxfc_wnd; | |
3502 | int server_init = ossl_quic_stream_is_server_init(qs); | |
3503 | int local_init = (ch->is_server == server_init); | |
3504 | int is_uni = !ossl_quic_stream_is_bidi(qs); | |
3505 | ||
db2f98c4 | 3506 | if (can_send) |
6ba2edb7 TM |
3507 | if ((qs->sstream = ossl_quic_sstream_new(INIT_APP_BUF_LEN)) == NULL) |
3508 | goto err; | |
e8fe7a21 | 3509 | |
db2f98c4 | 3510 | if (can_recv) |
a02571a0 TM |
3511 | if ((qs->rstream = ossl_quic_rstream_new(NULL, NULL, 0)) == NULL) |
3512 | goto err; | |
e8fe7a21 HL |
3513 | |
3514 | /* TXFC */ | |
3515 | if (!ossl_quic_txfc_init(&qs->txfc, &ch->conn_txfc)) | |
3516 | goto err; | |
3517 | ||
3518 | if (ch->got_remote_transport_params) { | |
3519 | /* | |
3520 | * If we already got peer TPs we need to apply the initial CWM credit | |
3521 | * now. If we didn't already get peer TPs this will be done | |
3522 | * automatically for all extant streams when we do. | |
3523 | */ | |
3524 | if (can_send) { | |
3525 | uint64_t cwm; | |
3526 | ||
3527 | if (is_uni) | |
3528 | cwm = ch->rx_init_max_stream_data_uni; | |
3529 | else if (local_init) | |
3530 | cwm = ch->rx_init_max_stream_data_bidi_local; | |
3531 | else | |
3532 | cwm = ch->rx_init_max_stream_data_bidi_remote; | |
3533 | ||
3534 | ossl_quic_txfc_bump_cwm(&qs->txfc, cwm); | |
3535 | } | |
3536 | } | |
3537 | ||
3538 | /* RXFC */ | |
3539 | if (!can_recv) | |
3540 | rxfc_wnd = 0; | |
3541 | else if (is_uni) | |
3542 | rxfc_wnd = ch->tx_init_max_stream_data_uni; | |
3543 | else if (local_init) | |
3544 | rxfc_wnd = ch->tx_init_max_stream_data_bidi_local; | |
3545 | else | |
3546 | rxfc_wnd = ch->tx_init_max_stream_data_bidi_remote; | |
3547 | ||
3548 | if (!ossl_quic_rxfc_init(&qs->rxfc, &ch->conn_rxfc, | |
3549 | rxfc_wnd, | |
3550 | DEFAULT_STREAM_RXFC_MAX_WND_MUL * rxfc_wnd, | |
3551 | get_time, ch)) | |
3552 | goto err; | |
3553 | ||
3554 | return 1; | |
3555 | ||
3556 | err: | |
3557 | ossl_quic_sstream_free(qs->sstream); | |
3558 | qs->sstream = NULL; | |
3559 | ossl_quic_rstream_free(qs->rstream); | |
3560 | qs->rstream = NULL; | |
3561 | return 0; | |
3562 | } | |
3563 | ||
9d6bd3d3 HL |
3564 | static uint64_t *ch_get_local_stream_next_ordinal_ptr(QUIC_CHANNEL *ch, |
3565 | int is_uni) | |
3566 | { | |
3567 | return is_uni ? &ch->next_local_stream_ordinal_uni | |
3568 | : &ch->next_local_stream_ordinal_bidi; | |
3569 | } | |
3570 | ||
3571 | int ossl_quic_channel_is_new_local_stream_admissible(QUIC_CHANNEL *ch, | |
3572 | int is_uni) | |
3573 | { | |
3574 | uint64_t *p_next_ordinal = ch_get_local_stream_next_ordinal_ptr(ch, is_uni); | |
3575 | ||
3576 | return ossl_quic_stream_map_is_local_allowed_by_stream_limit(&ch->qsm, | |
3577 | *p_next_ordinal, | |
3578 | is_uni); | |
3579 | } | |
3580 | ||
f20fdd16 | 3581 | QUIC_STREAM *ossl_quic_channel_new_stream_local(QUIC_CHANNEL *ch, int is_uni) |
2dbc39de HL |
3582 | { |
3583 | QUIC_STREAM *qs; | |
22b1a96f | 3584 | int type; |
2dbc39de HL |
3585 | uint64_t stream_id, *p_next_ordinal; |
3586 | ||
22b1a96f HL |
3587 | type = ch->is_server ? QUIC_STREAM_INITIATOR_SERVER |
3588 | : QUIC_STREAM_INITIATOR_CLIENT; | |
2dbc39de | 3589 | |
9d6bd3d3 HL |
3590 | p_next_ordinal = ch_get_local_stream_next_ordinal_ptr(ch, is_uni); |
3591 | ||
3592 | if (is_uni) | |
2dbc39de | 3593 | type |= QUIC_STREAM_DIR_UNI; |
9d6bd3d3 | 3594 | else |
2dbc39de | 3595 | type |= QUIC_STREAM_DIR_BIDI; |
2dbc39de HL |
3596 | |
3597 | if (*p_next_ordinal >= ((uint64_t)1) << 62) | |
3598 | return NULL; | |
3599 | ||
3600 | stream_id = ((*p_next_ordinal) << 2) | type; | |
3601 | ||
3602 | if ((qs = ossl_quic_stream_map_alloc(&ch->qsm, stream_id, type)) == NULL) | |
3603 | return NULL; | |
3604 | ||
e8fe7a21 HL |
3605 | /* Locally-initiated stream, so we always want a send buffer. */ |
3606 | if (!ch_init_new_stream(ch, qs, /*can_send=*/1, /*can_recv=*/!is_uni)) | |
3607 | goto err; | |
3608 | ||
2dbc39de HL |
3609 | ++*p_next_ordinal; |
3610 | return qs; | |
e8fe7a21 HL |
3611 | |
3612 | err: | |
3613 | ossl_quic_stream_map_release(&ch->qsm, qs); | |
3614 | return NULL; | |
2dbc39de | 3615 | } |
f20fdd16 HL |
3616 | |
3617 | QUIC_STREAM *ossl_quic_channel_new_stream_remote(QUIC_CHANNEL *ch, | |
3618 | uint64_t stream_id) | |
3619 | { | |
3620 | uint64_t peer_role; | |
e8fe7a21 | 3621 | int is_uni; |
f20fdd16 HL |
3622 | QUIC_STREAM *qs; |
3623 | ||
3624 | peer_role = ch->is_server | |
3625 | ? QUIC_STREAM_INITIATOR_CLIENT | |
3626 | : QUIC_STREAM_INITIATOR_SERVER; | |
3627 | ||
3628 | if ((stream_id & QUIC_STREAM_INITIATOR_MASK) != peer_role) | |
3629 | return NULL; | |
3630 | ||
e8fe7a21 HL |
3631 | is_uni = ((stream_id & QUIC_STREAM_DIR_MASK) == QUIC_STREAM_DIR_UNI); |
3632 | ||
f20fdd16 HL |
3633 | qs = ossl_quic_stream_map_alloc(&ch->qsm, stream_id, |
3634 | stream_id & (QUIC_STREAM_INITIATOR_MASK | |
3635 | | QUIC_STREAM_DIR_MASK)); | |
3636 | if (qs == NULL) | |
3637 | return NULL; | |
3638 | ||
e8fe7a21 HL |
3639 | if (!ch_init_new_stream(ch, qs, /*can_send=*/!is_uni, /*can_recv=*/1)) |
3640 | goto err; | |
3641 | ||
995ff282 HL |
3642 | if (ch->incoming_stream_auto_reject) |
3643 | ossl_quic_channel_reject_stream(ch, qs); | |
3644 | else | |
3645 | ossl_quic_stream_map_push_accept_queue(&ch->qsm, qs); | |
3646 | ||
f20fdd16 | 3647 | return qs; |
e8fe7a21 HL |
3648 | |
3649 | err: | |
3650 | ossl_quic_stream_map_release(&ch->qsm, qs); | |
3651 | return NULL; | |
f20fdd16 | 3652 | } |
995ff282 HL |
3653 | |
3654 | void ossl_quic_channel_set_incoming_stream_auto_reject(QUIC_CHANNEL *ch, | |
3655 | int enable, | |
3656 | uint64_t aec) | |
3657 | { | |
3658 | ch->incoming_stream_auto_reject = (enable != 0); | |
3659 | ch->incoming_stream_auto_reject_aec = aec; | |
3660 | } | |
3661 | ||
3662 | void ossl_quic_channel_reject_stream(QUIC_CHANNEL *ch, QUIC_STREAM *qs) | |
3663 | { | |
e8b9f632 HL |
3664 | ossl_quic_stream_map_stop_sending_recv_part(&ch->qsm, qs, |
3665 | ch->incoming_stream_auto_reject_aec); | |
995ff282 | 3666 | |
e8b9f632 HL |
3667 | ossl_quic_stream_map_reset_stream_send_part(&ch->qsm, qs, |
3668 | ch->incoming_stream_auto_reject_aec); | |
995ff282 HL |
3669 | qs->deleted = 1; |
3670 | ||
3671 | ossl_quic_stream_map_update_state(&ch->qsm, qs); | |
3672 | } | |
bbc97540 TM |
3673 | |
3674 | /* Replace local connection ID in TXP and DEMUX for testing purposes. */ | |
3675 | int ossl_quic_channel_replace_local_cid(QUIC_CHANNEL *ch, | |
3676 | const QUIC_CONN_ID *conn_id) | |
3677 | { | |
3678 | /* Remove the current local CID from the DEMUX. */ | |
3679 | if (!ossl_qrx_remove_dst_conn_id(ch->qrx, &ch->cur_local_cid)) | |
3680 | return 0; | |
3681 | ch->cur_local_cid = *conn_id; | |
3682 | /* Set in the TXP, used only for long header packets. */ | |
3683 | if (!ossl_quic_tx_packetiser_set_cur_scid(ch->txp, &ch->cur_local_cid)) | |
3684 | return 0; | |
3685 | /* Register our new local CID in the DEMUX. */ | |
3686 | if (!ossl_qrx_add_dst_conn_id(ch->qrx, &ch->cur_local_cid)) | |
3687 | return 0; | |
3688 | return 1; | |
3689 | } | |
5cf99b40 MC |
3690 | |
3691 | void ossl_quic_channel_set_msg_callback(QUIC_CHANNEL *ch, | |
3692 | ossl_msg_cb msg_callback, | |
c2786c8e | 3693 | SSL *msg_callback_ssl) |
5cf99b40 MC |
3694 | { |
3695 | ch->msg_callback = msg_callback; | |
c2786c8e MC |
3696 | ch->msg_callback_ssl = msg_callback_ssl; |
3697 | ossl_qtx_set_msg_callback(ch->qtx, msg_callback, msg_callback_ssl); | |
5cf99b40 | 3698 | ossl_quic_tx_packetiser_set_msg_callback(ch->txp, msg_callback, |
c2786c8e MC |
3699 | msg_callback_ssl); |
3700 | ossl_qrx_set_msg_callback(ch->qrx, msg_callback, msg_callback_ssl); | |
5cf99b40 MC |
3701 | } |
3702 | ||
3703 | void ossl_quic_channel_set_msg_callback_arg(QUIC_CHANNEL *ch, | |
3704 | void *msg_callback_arg) | |
3705 | { | |
3706 | ch->msg_callback_arg = msg_callback_arg; | |
3707 | ossl_qtx_set_msg_callback_arg(ch->qtx, msg_callback_arg); | |
3708 | ossl_quic_tx_packetiser_set_msg_callback_arg(ch->txp, msg_callback_arg); | |
3709 | ossl_qrx_set_msg_callback_arg(ch->qrx, msg_callback_arg); | |
3710 | } | |
16f3b542 HL |
3711 | |
3712 | void ossl_quic_channel_set_txku_threshold_override(QUIC_CHANNEL *ch, | |
3713 | uint64_t tx_pkt_threshold) | |
3714 | { | |
3715 | ch->txku_threshold_override = tx_pkt_threshold; | |
3716 | } | |
3717 | ||
3718 | uint64_t ossl_quic_channel_get_tx_key_epoch(QUIC_CHANNEL *ch) | |
3719 | { | |
3720 | return ossl_qtx_get_key_epoch(ch->qtx); | |
3721 | } | |
3722 | ||
3723 | uint64_t ossl_quic_channel_get_rx_key_epoch(QUIC_CHANNEL *ch) | |
3724 | { | |
3725 | return ossl_qrx_get_key_epoch(ch->qrx); | |
3726 | } | |
692a3cab HL |
3727 | |
3728 | int ossl_quic_channel_trigger_txku(QUIC_CHANNEL *ch) | |
3729 | { | |
3730 | if (!txku_allowed(ch)) | |
3731 | return 0; | |
3732 | ||
3733 | ch->ku_locally_initiated = 1; | |
3734 | ch_trigger_txku(ch); | |
3735 | return 1; | |
3736 | } | |
9ff3a99e HL |
3737 | |
3738 | int ossl_quic_channel_ping(QUIC_CHANNEL *ch) | |
3739 | { | |
3740 | int pn_space = ossl_quic_enc_level_to_pn_space(ch->tx_enc_level); | |
3741 | ||
3742 | ossl_quic_tx_packetiser_schedule_ack_eliciting(ch->txp, pn_space); | |
3743 | ||
3744 | return 1; | |
3745 | } | |
03b38595 HL |
3746 | |
3747 | void ossl_quic_channel_set_inhibit_tick(QUIC_CHANNEL *ch, int inhibit) | |
3748 | { | |
3749 | ch->inhibit_tick = (inhibit != 0); | |
3750 | } | |
17340e87 HL |
3751 | |
3752 | uint16_t ossl_quic_channel_get_diag_num_rx_ack(QUIC_CHANNEL *ch) | |
3753 | { | |
3754 | return ch->diag_num_rx_ack; | |
3755 | } | |
ed75eb32 HL |
3756 | |
3757 | void ossl_quic_channel_get_diag_local_cid(QUIC_CHANNEL *ch, QUIC_CONN_ID *cid) | |
3758 | { | |
3759 | *cid = ch->cur_local_cid; | |
3760 | } |