Line data Source code
1 : #include "fd_quic.h"
2 : #include "fd_quic_ack_tx.h"
3 : #include "fd_quic_common.h"
4 : #include "fd_quic_conn_id.h"
5 : #include "fd_quic_enum.h"
6 : #include "fd_quic_private.h"
7 : #include "fd_quic_conn.h"
8 : #include "fd_quic_conn_map.h"
9 : #include "fd_quic_proto.h"
10 : #include "fd_quic_proto.c"
11 : #include "fd_quic_retry.h"
12 :
13 : #define FD_TEMPL_FRAME_CTX fd_quic_frame_ctx_t
14 : #include "templ/fd_quic_frame_handler_decl.h"
15 : #include "templ/fd_quic_frames_templ.h"
16 : #include "templ/fd_quic_undefs.h"
17 :
18 : #include "fd_quic_pretty_print.c"
19 :
20 : #include "crypto/fd_quic_crypto_suites.h"
21 : #include "templ/fd_quic_transport_params.h"
22 : #include "templ/fd_quic_parse_util.h"
23 : #include "tls/fd_quic_tls.h"
24 :
25 : #include <fcntl.h> /* for keylog open(2) */
26 : #include <unistd.h> /* for keylog close(2) */
27 :
28 : #include "../../ballet/hex/fd_hex.h"
29 : #include "../../tango/tempo/fd_tempo.h"
30 : #include "../../util/log/fd_dtrace.h"
31 :
32 : #include "../../disco/metrics/generated/fd_metrics_enums.h"
33 :
34 : /* Declare map type for stream_id -> stream* */
35 : #define MAP_NAME fd_quic_stream_map
36 73514157 : #define MAP_KEY stream_id
37 39861014 : #define MAP_T fd_quic_stream_map_t
38 46942598 : #define MAP_KEY_NULL FD_QUIC_STREAM_ID_UNUSED
39 31961929 : #define MAP_KEY_INVAL(key) ((key)==MAP_KEY_NULL)
40 : #define MAP_QUERY_OPT 1
41 : #include "../../util/tmpl/fd_map_dynamic.c"
42 :
43 :
44 : /* FD_QUIC_MAX_STREAMS_ALWAYS_UNLESS_ACKED */
45 : /* Defines whether a MAX_STREAMS frame is sent even if it was just */
46 : /* sent */
47 : /* They take very little space, and a dropped MAX_STREAMS frame can */
48 : /* be very consequential */
49 : /* Even when set, QUIC won't send this frame if the client has ackd */
50 : /* the most recent value */
51 12177 : # define FD_QUIC_MAX_STREAMS_ALWAYS_UNLESS_ACKED 0
52 :
53 : /* Construction API ***************************************************/
54 :
55 : FD_QUIC_API FD_FN_CONST ulong
56 4386 : fd_quic_align( void ) {
57 4386 : return FD_QUIC_ALIGN;
58 4386 : }
59 :
60 : /* fd_quic_footprint_ext returns footprint of QUIC memory region given
61 : limits. Also writes byte offsets to given layout struct. */
62 : static ulong
63 : fd_quic_footprint_ext( fd_quic_limits_t const * limits,
64 11022 : fd_quic_layout_t * layout ) {
65 11022 : memset( layout, 0, sizeof(fd_quic_layout_t) );
66 11022 : if( FD_UNLIKELY( !limits ) ) return 0UL;
67 :
68 11022 : ulong conn_cnt = limits->conn_cnt;
69 11022 : ulong conn_id_cnt = limits->conn_id_cnt;
70 11022 : ulong log_depth = limits->log_depth;
71 11022 : ulong handshake_cnt = limits->handshake_cnt;
72 11022 : ulong inflight_frame_cnt = limits->inflight_frame_cnt;
73 11022 : ulong tx_buf_sz = limits->tx_buf_sz;
74 11022 : ulong stream_pool_cnt = limits->stream_pool_cnt;
75 11022 : ulong inflight_res_cnt = limits->min_inflight_frame_cnt_conn * conn_cnt;
76 11022 : if( FD_UNLIKELY( conn_cnt ==0UL ) ) return 0UL;
77 11022 : if( FD_UNLIKELY( handshake_cnt ==0UL ) ) return 0UL;
78 11022 : if( FD_UNLIKELY( inflight_frame_cnt==0UL ) ) return 0UL;
79 :
80 11022 : if( FD_UNLIKELY( inflight_res_cnt > inflight_frame_cnt ) ) return 0UL;
81 :
82 11019 : if( FD_UNLIKELY( conn_id_cnt < FD_QUIC_MIN_CONN_ID_CNT ))
83 0 : return 0UL;
84 :
85 11019 : layout->meta_sz = sizeof(fd_quic_layout_t);
86 :
87 11019 : ulong offs = 0;
88 :
89 : /* allocate space for fd_quic_t */
90 11019 : offs += sizeof(fd_quic_t);
91 :
92 : /* allocate space for state */
93 11019 : offs = fd_ulong_align_up( offs, alignof(fd_quic_state_t) );
94 11019 : offs += sizeof(fd_quic_state_t);
95 :
96 : /* allocate space for connections */
97 11019 : offs = fd_ulong_align_up( offs, fd_quic_conn_align() );
98 11019 : layout->conns_off = offs;
99 11019 : ulong conn_footprint = fd_quic_conn_footprint( limits );
100 11019 : if( FD_UNLIKELY( !conn_footprint ) ) { FD_LOG_WARNING(( "invalid fd_quic_conn_footprint" )); return 0UL; }
101 11019 : layout->conn_footprint = conn_footprint;
102 11019 : ulong conn_foot_tot = conn_cnt * conn_footprint;
103 11019 : offs += conn_foot_tot;
104 :
105 : /* allocate space for conn IDs */
106 11019 : offs = fd_ulong_align_up( offs, fd_quic_conn_map_align() );
107 11019 : layout->conn_map_off = offs;
108 11019 : ulong slot_cnt_bound = (ulong)( FD_QUIC_DEFAULT_SPARSITY * (double)conn_cnt * (double)conn_id_cnt );
109 11019 : int lg_slot_cnt = fd_ulong_find_msb( slot_cnt_bound - 1 ) + 1;
110 11019 : layout->lg_slot_cnt = lg_slot_cnt;
111 11019 : ulong conn_map_footprint = fd_quic_conn_map_footprint( lg_slot_cnt );
112 11019 : if( FD_UNLIKELY( !conn_map_footprint ) ) { FD_LOG_WARNING(( "invalid fd_quic_conn_map_footprint" )); return 0UL; }
113 11019 : offs += conn_map_footprint;
114 :
115 : /* allocate space for handshake pool */
116 11019 : offs = fd_ulong_align_up( offs, fd_quic_tls_hs_pool_align() );
117 11019 : layout->hs_pool_off = offs;
118 11019 : ulong hs_pool_fp = fd_quic_tls_hs_pool_footprint( limits->handshake_cnt );
119 11019 : if( FD_UNLIKELY( !hs_pool_fp ) ) { FD_LOG_WARNING(( "invalid fd_quic_tls_hs_pool_footprint" )); return 0UL; }
120 11019 : offs += hs_pool_fp;
121 :
122 : /* allocate space for stream pool */
123 11019 : if( stream_pool_cnt && tx_buf_sz ) {
124 10974 : offs = fd_ulong_align_up( offs, fd_quic_stream_pool_align() );
125 10974 : layout->stream_pool_off = offs;
126 10974 : ulong stream_pool_footprint = fd_quic_stream_pool_footprint( stream_pool_cnt, tx_buf_sz );
127 10974 : if( FD_UNLIKELY( !stream_pool_footprint ) ) { FD_LOG_WARNING(( "invalid fd_quic_stream_pool_footprint" )); return 0UL; }
128 10974 : offs += stream_pool_footprint;
129 10974 : } else {
130 45 : layout->stream_pool_off = 0UL;
131 45 : }
132 :
133 : /* allocate space for pkt_meta_pool */
134 11019 : if( inflight_frame_cnt ) {
135 11019 : offs = fd_ulong_align_up( offs, fd_quic_pkt_meta_pool_align() );
136 11019 : layout->pkt_meta_pool_off = offs;
137 11019 : ulong pkt_meta_footprint = fd_quic_pkt_meta_pool_footprint( inflight_frame_cnt );
138 11019 : if( FD_UNLIKELY( !pkt_meta_footprint ) ) { FD_LOG_WARNING(( "invalid fd_quic_pkt_meta_pool_footprint" )); return 0UL; }
139 11019 : offs += pkt_meta_footprint;
140 11019 : } else {
141 0 : layout->pkt_meta_pool_off = 0UL;
142 0 : }
143 :
144 : /* allocate space for quic_log_buf */
145 11019 : offs = fd_ulong_align_up( offs, fd_quic_log_buf_align() );
146 11019 : layout->log_off = offs;
147 11019 : ulong log_footprint = fd_quic_log_buf_footprint( log_depth );
148 11019 : if( FD_UNLIKELY( !log_footprint ) ) { FD_LOG_WARNING(( "invalid fd_quic_log_buf_footprint for depth %lu", log_depth )); return 0UL; }
149 11019 : offs += log_footprint;
150 :
151 11019 : return offs;
152 11019 : }
153 :
154 : FD_QUIC_API ulong
155 2181 : fd_quic_footprint( fd_quic_limits_t const * limits ) {
156 2181 : fd_quic_layout_t layout;
157 2181 : return fd_quic_footprint_ext( limits, &layout );
158 2181 : }
159 :
160 : static ulong
161 16920 : fd_quic_clock_wallclock( void * ctx FD_PARAM_UNUSED ) {
162 16920 : return (ulong)fd_log_wallclock();
163 16920 : }
164 :
165 : static ulong
166 39862476 : fd_quic_clock_tickcount( void * ctx FD_PARAM_UNUSED ) {
167 39862476 : return (ulong)fd_tickcount();
168 39862476 : }
169 :
170 : FD_QUIC_API void *
171 : fd_quic_new( void * mem,
172 2139 : fd_quic_limits_t const * limits ) {
173 :
174 : /* Argument checks */
175 :
176 2139 : if( FD_UNLIKELY( !mem ) ) {
177 0 : FD_LOG_WARNING(( "NULL mem" ));
178 0 : return NULL;
179 0 : }
180 :
181 2139 : ulong align = fd_quic_align();
182 2139 : if( FD_UNLIKELY( !fd_ulong_is_aligned( (ulong)mem, align ) ) ) {
183 0 : FD_LOG_WARNING(( "misaligned mem" ));
184 0 : return NULL;
185 0 : }
186 :
187 2139 : if( FD_UNLIKELY( !limits ) ) {
188 0 : FD_LOG_WARNING(( "NULL limits" ));
189 0 : return NULL;
190 0 : }
191 :
192 2139 : if( FD_UNLIKELY( ( limits->conn_cnt ==0UL )
193 2139 : | ( limits->conn_cnt >=UINT_MAX )
194 2139 : | ( limits->handshake_cnt ==0UL )
195 2139 : | ( limits->inflight_frame_cnt==0UL ) ) ) {
196 0 : FD_LOG_WARNING(( "invalid limits" ));
197 0 : return NULL;
198 0 : }
199 :
200 2139 : fd_quic_layout_t layout;
201 2139 : ulong footprint = fd_quic_footprint_ext( limits, &layout );
202 2139 : if( FD_UNLIKELY( !footprint ) ) {
203 0 : FD_LOG_WARNING(( "invalid footprint for config" ));
204 0 : return NULL;
205 0 : }
206 :
207 2139 : fd_quic_t * quic = (fd_quic_t *)mem;
208 :
209 : /* Clear fd_quic_t memory region */
210 2139 : fd_memset( quic, 0, footprint );
211 :
212 : /* Defaults */
213 2139 : quic->config.idle_timeout = FD_QUIC_DEFAULT_IDLE_TIMEOUT;
214 2139 : quic->config.ack_delay = FD_QUIC_DEFAULT_ACK_DELAY;
215 2139 : quic->config.retry_ttl = FD_QUIC_DEFAULT_RETRY_TTL;
216 2139 : quic->config.tls_hs_ttl = FD_QUIC_DEFAULT_TLS_HS_TTL;
217 :
218 : /* Default clock source */
219 2139 : quic->cb.now = fd_quic_clock_wallclock;
220 2139 : quic->cb.now_ctx = NULL;
221 2139 : quic->config.tick_per_us = 1000.0;
222 :
223 : /* Copy layout descriptors */
224 2139 : quic->limits = *limits;
225 2139 : quic->layout = layout;
226 :
227 : /* Init log buffer (persists across init calls) */
228 2139 : void * shmlog = (void *)( (ulong)quic + quic->layout.log_off );
229 2139 : if( FD_UNLIKELY( !fd_quic_log_buf_new( shmlog, limits->log_depth ) ) ) {
230 0 : return NULL;
231 0 : }
232 :
233 2139 : FD_COMPILER_MFENCE();
234 2139 : quic->magic = FD_QUIC_MAGIC;
235 2139 : FD_COMPILER_MFENCE();
236 :
237 2139 : return quic;
238 2139 : }
239 :
240 : FD_QUIC_API fd_quic_limits_t *
241 : fd_quic_limits_from_env( int * pargc,
242 : char *** pargv,
243 0 : fd_quic_limits_t * limits ) {
244 :
245 0 : if( FD_UNLIKELY( !limits ) ) return NULL;
246 :
247 0 : limits->conn_cnt = fd_env_strip_cmdline_ulong( pargc, pargv, "--quic-conns", "QUIC_CONN_CNT", 512UL );
248 0 : limits->conn_id_cnt = fd_env_strip_cmdline_ulong( pargc, pargv, "--quic-conn-ids", "QUIC_CONN_ID_CNT", 16UL );
249 0 : limits->stream_pool_cnt = fd_env_strip_cmdline_uint ( pargc, pargv, "--quic-streams", "QUIC_STREAM_CNT", 8UL );
250 0 : limits->handshake_cnt = fd_env_strip_cmdline_uint ( pargc, pargv, "--quic-handshakes", "QUIC_HANDSHAKE_CNT", 512UL );
251 0 : limits->inflight_frame_cnt = fd_env_strip_cmdline_ulong( pargc, pargv, "--quic-inflight-pkts", "QUIC_MAX_INFLIGHT_PKTS", 2500UL );
252 0 : limits->tx_buf_sz = fd_env_strip_cmdline_ulong( pargc, pargv, "--quic-tx-buf-sz", "QUIC_TX_BUF_SZ", 4096UL );
253 :
254 0 : return limits;
255 0 : }
256 :
257 : FD_QUIC_API fd_quic_config_t *
258 : fd_quic_config_from_env( int * pargc,
259 : char *** pargv,
260 0 : fd_quic_config_t * cfg ) {
261 :
262 0 : if( FD_UNLIKELY( !cfg ) ) return NULL;
263 :
264 0 : char const * keylog_file = fd_env_strip_cmdline_cstr ( pargc, pargv, NULL, "SSLKEYLOGFILE", NULL );
265 0 : ulong idle_timeout_ms = fd_env_strip_cmdline_ulong( pargc, pargv, "--idle-timeout", NULL, 3000UL );
266 0 : ulong initial_rx_max_stream_data = fd_env_strip_cmdline_ulong(
267 0 : pargc,
268 0 : pargv,
269 0 : "--quic-initial-rx-max-stream-data",
270 0 : "QUIC_INITIAL_RX_MAX_STREAM_DATA",
271 0 : FD_QUIC_DEFAULT_INITIAL_RX_MAX_STREAM_DATA
272 0 : );
273 0 : cfg->retry = fd_env_strip_cmdline_contains( pargc, pargv, "--quic-retry" );
274 :
275 0 : if( keylog_file ) {
276 0 : strncpy( cfg->keylog_file, keylog_file, FD_QUIC_PATH_LEN );
277 0 : } else {
278 0 : cfg->keylog_file[0]='\0';
279 0 : }
280 :
281 0 : cfg->idle_timeout = idle_timeout_ms * (ulong)1e6;
282 0 : cfg->initial_rx_max_stream_data = initial_rx_max_stream_data;
283 :
284 0 : return cfg;
285 0 : }
286 :
287 : FD_QUIC_API fd_aio_t const *
288 42 : fd_quic_get_aio_net_rx( fd_quic_t * quic ) {
289 42 : fd_aio_new( &quic->aio_rx, quic, fd_quic_aio_cb_receive );
290 42 : return &quic->aio_rx;
291 42 : }
292 :
293 : FD_QUIC_API void
294 : fd_quic_set_aio_net_tx( fd_quic_t * quic,
295 3414 : fd_aio_t const * aio_tx ) {
296 :
297 3414 : if( aio_tx ) {
298 3372 : quic->aio_tx = *aio_tx;
299 3372 : } else {
300 42 : memset( &quic->aio_tx, 0, sizeof(fd_aio_t) );
301 42 : }
302 3414 : }
303 :
304 : /* fd_quic_ticks_to_us converts ticks to microseconds
305 : fd_quic_us_to_ticks converts microseconds to ticks
306 : These should only be used after clock has been set
307 : Relies on conversion rate in config */
308 0 : FD_FN_UNUSED static ulong fd_quic_ticks_to_us( fd_quic_t * quic, ulong ticks ) {
309 0 : double ratio = quic->config.tick_per_us;
310 0 : return (ulong)( (double)ticks / ratio );
311 0 : }
312 :
313 12042 : static ulong fd_quic_us_to_ticks( fd_quic_t * quic, ulong us ) {
314 12042 : double ratio = quic->config.tick_per_us;
315 12042 : return (ulong)( (double)us * ratio );
316 12042 : }
317 :
318 : FD_QUIC_API void
319 : fd_quic_set_clock( fd_quic_t * quic,
320 : fd_quic_now_t now_fn,
321 : void * now_ctx,
322 6 : double tick_per_us ) {
323 6 : fd_quic_config_t * config = &quic->config;
324 6 : fd_quic_callbacks_t * cb = &quic->cb;
325 :
326 6 : double ratio = tick_per_us / config->tick_per_us;
327 :
328 6 : config->idle_timeout = (ulong)( ratio * (double)config->idle_timeout );
329 6 : config->ack_delay = (ulong)( ratio * (double)config->ack_delay );
330 6 : config->retry_ttl = (ulong)( ratio * (double)config->retry_ttl );
331 : /* Add more timing config here */
332 :
333 6 : config->tick_per_us = tick_per_us;
334 6 : cb->now = now_fn;
335 6 : cb->now_ctx = now_ctx;
336 6 : }
337 :
338 : FD_QUIC_API void
339 6 : fd_quic_set_clock_tickcount( fd_quic_t * quic ) {
340 : /* FIXME log warning and return error if tickcount ticks too slow or fluctuates too much */
341 6 : double tick_per_us = fd_tempo_tick_per_ns( NULL ) * 1000.0;
342 6 : fd_quic_set_clock( quic, fd_quic_clock_tickcount, NULL, tick_per_us );
343 6 : }
344 :
345 : /* initialize everything that mutates during runtime */
346 : static void
347 13283461 : fd_quic_stream_init( fd_quic_stream_t * stream ) {
348 13283461 : stream->context = NULL;
349 :
350 13283461 : stream->tx_buf.head = 0;
351 13283461 : stream->tx_buf.tail = 0;
352 13283461 : stream->tx_sent = 0;
353 :
354 13283461 : stream->stream_flags = 0;
355 : /* don't update next here, since it's still in use */
356 :
357 13283461 : stream->state = 0;
358 :
359 13283461 : stream->tx_max_stream_data = 0;
360 13283461 : stream->tx_tot_data = 0;
361 :
362 13283461 : stream->rx_tot_data = 0;
363 :
364 13283461 : stream->upd_pkt_number = 0;
365 13283461 : }
366 :
367 : FD_QUIC_API fd_quic_t *
368 2139 : fd_quic_join( void * shquic ) {
369 :
370 2139 : if( FD_UNLIKELY( !shquic ) ) {
371 0 : FD_LOG_WARNING(( "null shquic" ));
372 0 : return NULL;
373 0 : }
374 2139 : if( FD_UNLIKELY( !fd_ulong_is_aligned( (ulong)shquic, FD_QUIC_ALIGN ) ) ) {
375 0 : FD_LOG_WARNING(( "misaligned quic" ));
376 0 : return NULL;
377 0 : }
378 :
379 2139 : fd_quic_t * quic = (fd_quic_t *)shquic;
380 2139 : if( FD_UNLIKELY( quic->magic != FD_QUIC_MAGIC ) ) {
381 0 : FD_LOG_WARNING(( "bad magic" ));
382 0 : return NULL;
383 0 : }
384 :
385 2139 : return quic;
386 2139 : }
387 :
388 : FD_QUIC_API void *
389 2136 : fd_quic_leave( fd_quic_t * quic ) {
390 2136 : return (void *)quic;
391 2136 : }
392 :
393 : FD_QUIC_API fd_quic_t *
394 3378 : fd_quic_init( fd_quic_t * quic ) {
395 :
396 3378 : fd_quic_limits_t const * limits = &quic->limits;
397 3378 : fd_quic_config_t * config = &quic->config;
398 :
399 3378 : if( FD_UNLIKELY( !config->role ) ) { FD_LOG_WARNING(( "cfg.role not set" )); return NULL; }
400 3378 : if( FD_UNLIKELY( !config->idle_timeout ) ) { FD_LOG_WARNING(( "zero cfg.idle_timeout" )); return NULL; }
401 3378 : if( FD_UNLIKELY( !config->ack_delay ) ) { FD_LOG_WARNING(( "zero cfg.ack_delay" )); return NULL; }
402 3378 : if( FD_UNLIKELY( !config->retry_ttl ) ) { FD_LOG_WARNING(( "zero cfg.retry_ttl" )); return NULL; }
403 3378 : if( FD_UNLIKELY( !quic->cb.now ) ) { FD_LOG_WARNING(( "NULL cb.now" )); return NULL; }
404 3378 : if( FD_UNLIKELY( config->tick_per_us==0 ) ) { FD_LOG_WARNING(( "zero cfg.tick_per_us" )); return NULL; }
405 :
406 3378 : do {
407 3378 : ulong x = 0U;
408 111474 : for( ulong i=0UL; i<32UL; i++ ) x |= quic->config.identity_public_key[i];
409 :
410 3378 : if( FD_UNLIKELY( !x ) ) {
411 0 : FD_LOG_WARNING(( "cfg.identity_public_key not set" ));
412 0 : return NULL;
413 0 : }
414 3378 : } while(0);
415 :
416 3378 : switch( config->role ) {
417 2088 : case FD_QUIC_ROLE_SERVER:
418 3378 : case FD_QUIC_ROLE_CLIENT:
419 3378 : break;
420 0 : default:
421 0 : FD_LOG_WARNING(( "invalid cfg.role" ));
422 0 : return NULL;
423 3378 : }
424 :
425 3378 : if( FD_UNLIKELY( !config->ack_threshold ) ) {
426 6 : config->ack_threshold = FD_QUIC_DEFAULT_ACK_THRESHOLD;
427 6 : }
428 :
429 3378 : fd_quic_layout_t layout = {0};
430 3378 : if( FD_UNLIKELY( !fd_quic_footprint_ext( &quic->limits, &layout ) ) ) {
431 0 : FD_LOG_CRIT(( "fd_quic_footprint_ext failed" ));
432 0 : }
433 3378 : if( FD_UNLIKELY( 0!=memcmp( &layout, &quic->layout, sizeof(fd_quic_layout_t) ) ) ) {
434 0 : FD_LOG_HEXDUMP_WARNING(( "saved layout", &quic->layout, sizeof(fd_quic_layout_t) ));
435 0 : FD_LOG_HEXDUMP_WARNING(( "derived layout", &layout, sizeof(fd_quic_layout_t) ));
436 0 : FD_LOG_CRIT(( "fd_quic_layout changed. Memory corruption?" ));
437 0 : }
438 :
439 : /* Reset state */
440 :
441 3378 : fd_quic_state_t * state = fd_quic_get_state( quic );
442 3378 : memset( state, 0, sizeof(fd_quic_state_t) );
443 :
444 3378 : void * shmlog = (void *)( (ulong)quic + layout.log_off );
445 3378 : if( FD_UNLIKELY( !fd_quic_log_tx_join( state->log_tx, shmlog ) ) ) {
446 0 : FD_LOG_CRIT(( "fd_quic_log_tx_join failed, indicating memory corruption" ));
447 0 : }
448 :
449 : /* State: Initialize packet meta pool */
450 3378 : if( layout.pkt_meta_pool_off ) {
451 3378 : ulong pkt_meta_cnt = limits->inflight_frame_cnt;
452 3378 : ulong pkt_meta_laddr = (ulong)quic + layout.pkt_meta_pool_off;
453 3378 : fd_quic_pkt_meta_t * pkt_meta_pool = fd_quic_pkt_meta_pool_new( (void*)pkt_meta_laddr, pkt_meta_cnt );
454 3378 : state->pkt_meta_pool = fd_quic_pkt_meta_pool_join( pkt_meta_pool );
455 3378 : fd_quic_pkt_meta_ds_init_pool( pkt_meta_pool, pkt_meta_cnt );
456 3378 : }
457 :
458 : /* State: initialize each connection, and add to free list */
459 :
460 3378 : ulong conn_laddr = (ulong)quic + layout.conns_off;
461 :
462 : /* used for indexing */
463 3378 : state->conn_base = conn_laddr;
464 3378 : state->conn_sz = layout.conn_footprint;
465 :
466 : /* initialize free_conns */
467 3378 : state->free_conn_list = UINT_MAX;
468 :
469 3378 : fd_quic_conn_t * last = NULL;
470 320040 : for( ulong j = 0; j < limits->conn_cnt; ++j ) {
471 316662 : void * conn_mem = (void *)( conn_laddr );
472 316662 : conn_laddr += layout.conn_footprint;
473 :
474 316662 : fd_quic_conn_t * conn = fd_quic_conn_new( conn_mem, quic, limits );
475 316662 : if( FD_UNLIKELY( !conn ) ) {
476 0 : FD_LOG_WARNING(( "NULL conn" ));
477 0 : return NULL;
478 0 : }
479 :
480 : /* used for indexing */
481 316662 : conn->conn_idx = (uint)j;
482 :
483 316662 : conn->svc_type = UINT_MAX;
484 316662 : conn->svc_next = conn->svc_prev = UINT_MAX;
485 : /* start with minimum supported max datagram */
486 : /* peers may allow more */
487 316662 : conn->tx_max_datagram_sz = FD_QUIC_INITIAL_PAYLOAD_SZ_MAX;
488 :
489 : /* add to free list */
490 316662 : *fd_ptr_if( last!=NULL, &last->svc_next, &state->free_conn_list ) = (uint)j;
491 :
492 316662 : last = conn;
493 316662 : }
494 :
495 : /* State: Initialize conn ID map */
496 :
497 3378 : ulong conn_map_laddr = (ulong)quic + layout.conn_map_off;
498 3378 : state->conn_map = fd_quic_conn_map_join( fd_quic_conn_map_new( (void *)conn_map_laddr, layout.lg_slot_cnt ) );
499 3378 : if( FD_UNLIKELY( !state->conn_map ) ) {
500 0 : FD_LOG_WARNING(( "NULL conn_map" ));
501 0 : return NULL;
502 0 : }
503 :
504 : /* State: Initialize service queue */
505 :
506 13512 : for( uint j=0U; j<FD_QUIC_SVC_CNT; j++ ) {
507 10134 : state->svc_queue[j].head = UINT_MAX;
508 10134 : state->svc_queue[j].tail = UINT_MAX;
509 10134 : }
510 3378 : state->svc_delay[ FD_QUIC_SVC_INSTANT ] = 0UL;
511 3378 : state->svc_delay[ FD_QUIC_SVC_ACK_TX ] = quic->config.ack_delay;
512 3378 : state->svc_delay[ FD_QUIC_SVC_WAIT ] = (quic->config.idle_timeout)>>(quic->config.keep_alive);
513 :
514 : /* Check TX AIO */
515 :
516 3378 : if( FD_UNLIKELY( !quic->aio_tx.send_func ) ) {
517 0 : FD_LOG_WARNING(( "NULL aio_tx" ));
518 0 : return NULL;
519 0 : }
520 :
521 : /* State: Initialize TLS */
522 :
523 3378 : fd_quic_tls_cfg_t tls_cfg = {
524 3378 : .max_concur_handshakes = limits->handshake_cnt,
525 :
526 : /* set up callbacks */
527 3378 : .secret_cb = fd_quic_tls_cb_secret,
528 3378 : .handshake_complete_cb = fd_quic_tls_cb_handshake_complete,
529 3378 : .peer_params_cb = fd_quic_tls_cb_peer_params,
530 :
531 3378 : .signer = {
532 3378 : .ctx = config->sign_ctx,
533 3378 : .sign_fn = config->sign,
534 3378 : },
535 :
536 3378 : .cert_public_key = quic->config.identity_public_key,
537 3378 : };
538 :
539 : /* State: Initialize handshake pool */
540 :
541 3378 : if( FD_UNLIKELY( !fd_quic_tls_new( state->tls, &tls_cfg ) ) ) {
542 0 : FD_DEBUG( FD_LOG_WARNING( ( "fd_quic_tls_new failed" ) ) );
543 0 : return NULL;
544 0 : }
545 :
546 3378 : ulong hs_pool_laddr = (ulong)quic + layout.hs_pool_off;
547 3378 : fd_quic_tls_hs_t * hs_pool = fd_quic_tls_hs_pool_join( fd_quic_tls_hs_pool_new( (void *)hs_pool_laddr, limits->handshake_cnt ) );
548 3378 : if( FD_UNLIKELY( !hs_pool ) ) {
549 0 : FD_LOG_WARNING(( "fd_quic_tls_hs_pool_new failed" ));
550 0 : return NULL;
551 0 : }
552 3378 : state->hs_pool = hs_pool;
553 :
554 : /* State: Initialize TLS handshake cache */
555 3378 : if( FD_LIKELY( !fd_quic_tls_hs_cache_join(
556 3378 : fd_quic_tls_hs_cache_new( &state->hs_cache )
557 3378 : ))) {
558 0 : FD_LOG_WARNING(( "fd_quic_tls_hs_cache_new failed" ));
559 0 : return NULL;
560 0 : }
561 :
562 :
563 3378 : if( layout.stream_pool_off ) {
564 3369 : ulong stream_pool_cnt = limits->stream_pool_cnt;
565 3369 : ulong tx_buf_sz = limits->tx_buf_sz;
566 3369 : ulong stream_pool_laddr = (ulong)quic + layout.stream_pool_off;
567 3369 : state->stream_pool = fd_quic_stream_pool_new( (void*)stream_pool_laddr, stream_pool_cnt, tx_buf_sz );
568 3369 : }
569 :
570 : /* generate a secure random number as seed for fd_rng */
571 3378 : uint rng_seed = 0;
572 3378 : int rng_seed_ok = !!fd_rng_secure( &rng_seed, sizeof(rng_seed) );
573 3378 : if( FD_UNLIKELY( !rng_seed_ok ) ) {
574 0 : FD_LOG_ERR(( "fd_rng_secure failed" ));
575 0 : }
576 3378 : fd_rng_new( state->_rng, rng_seed, 0UL );
577 :
578 : /* use rng to generate secret bytes for future RETRY token generation */
579 3378 : int rng1_ok = !!fd_rng_secure( state->retry_secret, FD_QUIC_RETRY_SECRET_SZ );
580 3378 : int rng2_ok = !!fd_rng_secure( state->retry_iv, FD_QUIC_RETRY_IV_SZ );
581 3378 : if( FD_UNLIKELY( !rng1_ok || !rng2_ok ) ) {
582 0 : FD_LOG_ERR(( "fd_rng_secure failed" ));
583 0 : return NULL;
584 0 : }
585 :
586 : /* Initialize transport params */
587 :
588 3378 : fd_quic_transport_params_t * tp = &state->transport_params;
589 :
590 : /* initial max streams is zero */
591 : /* we will send max_streams and max_data frames later to allow the peer to */
592 : /* send us data */
593 3378 : ulong initial_max_streams_uni = quic->config.role==FD_QUIC_ROLE_SERVER ? 1UL<<60 : 0;
594 3378 : ulong initial_max_stream_data = config->initial_rx_max_stream_data;
595 :
596 3378 : double tick_per_ns = (double)quic->config.tick_per_us / 1e3;
597 :
598 3378 : double max_ack_delay_ticks = (double)(config->ack_delay * 2UL);
599 3378 : double max_ack_delay_ns = max_ack_delay_ticks / tick_per_ns;
600 3378 : double max_ack_delay_ms = max_ack_delay_ns / 1e6;
601 3378 : ulong max_ack_delay_ms_u = (ulong)round( max_ack_delay_ms );
602 :
603 3378 : double idle_timeout_ns = (double)config->idle_timeout / tick_per_ns;
604 3378 : double idle_timeout_ms = idle_timeout_ns / 1e6;
605 3378 : ulong idle_timeout_ms_u = (ulong)round( idle_timeout_ms );
606 :
607 3378 : memset( tp, 0, sizeof(fd_quic_transport_params_t) );
608 3378 : FD_QUIC_TRANSPORT_PARAM_SET( tp, max_idle_timeout_ms, idle_timeout_ms_u );
609 3378 : FD_QUIC_TRANSPORT_PARAM_SET( tp, max_udp_payload_size, FD_QUIC_MAX_PAYLOAD_SZ ); /* TODO */
610 3378 : FD_QUIC_TRANSPORT_PARAM_SET( tp, initial_max_data, (1UL<<62)-1UL );
611 3378 : FD_QUIC_TRANSPORT_PARAM_SET( tp, initial_max_stream_data_uni, initial_max_stream_data );
612 3378 : FD_QUIC_TRANSPORT_PARAM_SET( tp, initial_max_streams_bidi, 0 );
613 3378 : FD_QUIC_TRANSPORT_PARAM_SET( tp, initial_max_streams_uni, initial_max_streams_uni );
614 3378 : FD_QUIC_TRANSPORT_PARAM_SET( tp, ack_delay_exponent, 0 );
615 3378 : FD_QUIC_TRANSPORT_PARAM_SET( tp, max_ack_delay, max_ack_delay_ms_u );
616 3378 : /* */tp->disable_active_migration_present = 1;
617 :
618 : /* Compute max inflight pkt cnt per conn */
619 3378 : state->max_inflight_frame_cnt_conn = limits->inflight_frame_cnt - limits->min_inflight_frame_cnt_conn * (limits->conn_cnt-1);
620 :
621 3378 : return quic;
622 3378 : }
623 :
624 : /* fd_quic_enc_level_to_pn_space maps of encryption level in [0,4) to
625 : packet number space. */
626 : static uint
627 40710480 : fd_quic_enc_level_to_pn_space( uint enc_level ) {
628 : /* TODO improve this map */
629 40710480 : static uchar const el2pn_map[] = { 0, 2, 1, 2 };
630 :
631 40710480 : if( FD_UNLIKELY( enc_level >= 4U ) )
632 0 : FD_LOG_ERR(( "fd_quic_enc_level_to_pn_space called with invalid enc_level" ));
633 :
634 40710480 : return el2pn_map[ enc_level ];
635 40710480 : }
636 :
637 : /* This code is directly from rfc9000 A.3 */
638 : FD_FN_CONST ulong
639 : fd_quic_reconstruct_pkt_num( ulong pktnum_comp,
640 : ulong pktnum_sz,
641 13570018 : ulong exp_pkt_number ) {
642 13570018 : ulong pn_nbits = pktnum_sz << 3u;
643 13570018 : ulong pn_win = 1ul << pn_nbits;
644 13570018 : ulong pn_hwin = pn_win >> 1ul;
645 13570018 : ulong pn_mask = pn_win - 1ul;
646 : // The incoming packet number should be greater than
647 : // exp_pkt_number - pn_hwin and less than or equal to
648 : // exp_pkt_number + pn_hwin
649 : //
650 : // This means we cannot just strip the trailing bits from
651 : // exp_pkt_number and add the truncated_pn because that might
652 : // yield a value outside the window.
653 : //
654 : // The following code calculates a candidate value and
655 : // makes sure it's within the packet number window.
656 : // Note the extra checks to prevent overflow and underflow.
657 13570018 : ulong candidate_pn = ( exp_pkt_number & ~pn_mask ) | pktnum_comp;
658 13570018 : if( candidate_pn + pn_hwin <= exp_pkt_number &&
659 13570018 : candidate_pn + pn_win < ( 1ul << 62ul ) ) {
660 0 : return candidate_pn + pn_win;
661 0 : }
662 :
663 13570018 : if( candidate_pn > exp_pkt_number + pn_hwin &&
664 13570018 : candidate_pn >= pn_win ) {
665 0 : return candidate_pn - pn_win;
666 0 : }
667 :
668 13570018 : return candidate_pn;
669 13570018 : }
670 :
671 : static void
672 : fd_quic_svc_unqueue( fd_quic_state_t * state,
673 14348137 : fd_quic_conn_t * conn ) {
674 :
675 14348137 : fd_quic_svc_queue_t * queue = &state->svc_queue[ conn->svc_type ];
676 14348137 : uint prev_idx = conn->svc_prev;
677 14348137 : uint next_idx = conn->svc_next;
678 14348137 : fd_quic_conn_t * prev_ele = fd_quic_conn_at_idx( state, prev_idx );
679 14348137 : fd_quic_conn_t * next_ele = fd_quic_conn_at_idx( state, next_idx );
680 :
681 14348137 : *fd_ptr_if( next_idx!=UINT_MAX, &next_ele->svc_prev, &queue->head ) = prev_idx;
682 14348137 : *fd_ptr_if( prev_idx!=UINT_MAX, &prev_ele->svc_next, &queue->tail ) = next_idx;
683 :
684 14348137 : }
685 :
686 : void
687 : fd_quic_svc_schedule( fd_quic_state_t * state,
688 : fd_quic_conn_t * conn,
689 146200555 : uint svc_type ) {
690 146200555 : if( FD_UNLIKELY( svc_type >= FD_QUIC_SVC_CNT ) ) {
691 0 : FD_LOG_ERR(( "fd_quic_svc_schedule called with invalid svc_type (%u)", svc_type ));
692 0 : }
693 146200555 : if( FD_UNLIKELY( conn->state == FD_QUIC_CONN_STATE_INVALID ) ) {
694 0 : FD_LOG_ERR(( "fd_quic_svc_schedule called with invalid conn" ));
695 0 : }
696 :
697 146200555 : int is_queued = conn->svc_type < FD_QUIC_SVC_CNT;
698 146200555 : long cur_delay = (long)conn->svc_time - (long)state->now;
699 146200555 : long tgt_delay = (long)state->svc_delay[ svc_type ];
700 :
701 : /* Don't reschedule if already scheduled sooner */
702 146200555 : if( is_queued && cur_delay<=tgt_delay ) return;
703 :
704 : /* Remove entry from current queue */
705 28203215 : if( is_queued ) {
706 14335972 : fd_quic_svc_unqueue( state, conn );
707 14335972 : is_queued = 0;
708 14335972 : }
709 :
710 : /* Add into new queue */
711 28203215 : fd_quic_svc_queue_t * queue = &state->svc_queue[ svc_type ];
712 28203215 : uint old_tail_idx = queue->tail;
713 28203215 : fd_quic_conn_t * old_tail_ele = fd_quic_conn_at_idx( state, old_tail_idx );
714 28203215 : conn->svc_type = svc_type;
715 28203215 : conn->svc_time = state->now + (ulong)tgt_delay;
716 28203215 : conn->svc_prev = UINT_MAX;
717 28203215 : conn->svc_next = old_tail_idx;
718 28203215 : *fd_ptr_if( old_tail_idx!=UINT_MAX, &old_tail_ele->svc_prev, &queue->head ) = (uint)conn->conn_idx;
719 28203215 : queue->tail = (uint)conn->conn_idx;
720 :
721 28203215 : }
722 :
723 : /* fd_quic_svc_queue_validate checks the following:
724 : - dlist prev and next chains are in agreement
725 : - all nodes belong to the same list
726 : - no cycles in list
727 : - no excessive delays (assumes no monotonically increasing timestamp) */
728 :
729 : static void
730 : fd_quic_svc_queue_validate( fd_quic_t * quic,
731 135 : uint svc_type ) {
732 135 : FD_TEST( svc_type < FD_QUIC_SVC_CNT );
733 135 : fd_quic_state_t * state = fd_quic_get_state( quic );
734 135 : ulong now = state->now;
735 :
736 135 : ulong cnt = 0UL;
737 135 : uint prev = UINT_MAX;
738 135 : uint node = state->svc_queue[ svc_type ].tail;
739 300165 : while( node!=UINT_MAX ) {
740 300030 : FD_TEST( node <= quic->limits.conn_cnt );
741 300030 : fd_quic_conn_t * conn = fd_quic_conn_at_idx( state, node );
742 300030 : FD_TEST( conn->state != FD_QUIC_CONN_STATE_INVALID );
743 300030 : FD_TEST( conn->svc_type == svc_type );
744 300030 : FD_TEST( conn->svc_time <= now + state->svc_delay[ svc_type ] );
745 300030 : FD_TEST( conn->svc_prev == prev );
746 300030 : conn->visited = 1U;
747 :
748 300030 : prev = node;
749 300030 : node = conn->svc_next;
750 300030 : cnt++;
751 300030 : FD_TEST( cnt <= quic->limits.conn_cnt );
752 :
753 300030 : }
754 135 : FD_TEST( prev == state->svc_queue[ svc_type ].head );
755 135 : }
756 :
757 : /* validates the free conn list doesn't cycle, point nowhere, leak, or point to live conn */
758 : static void
759 45 : fd_quic_conn_free_validate( fd_quic_t * quic ) {
760 45 : fd_quic_state_t * state = fd_quic_get_state( quic );
761 45 : ulong cnt = 0UL;
762 45 : uint node = state->free_conn_list;
763 363 : while( node!=UINT_MAX ) {
764 318 : FD_TEST( node <= quic->limits.conn_cnt );
765 318 : fd_quic_conn_t * conn = fd_quic_conn_at_idx( state, node );
766 318 : FD_TEST( conn->state == FD_QUIC_CONN_STATE_INVALID );
767 318 : FD_TEST( conn->svc_prev == UINT_MAX );
768 318 : FD_TEST( conn->svc_type == UINT_MAX );
769 318 : conn->visited = 1U;
770 318 : node = conn->svc_next;
771 318 : cnt++;
772 318 : FD_TEST( cnt <= quic->limits.conn_cnt );
773 318 : }
774 45 : }
775 :
776 : void
777 45 : fd_quic_svc_validate( fd_quic_t * quic ) {
778 45 : fd_quic_state_t * state = fd_quic_get_state( quic );
779 300393 : for( ulong j=0UL; j < quic->limits.conn_cnt; j++ ) {
780 300348 : fd_quic_conn_t * conn = fd_quic_conn_at_idx( state, j );
781 300348 : FD_TEST( conn->conn_idx==j );
782 300348 : conn->visited = 0U;
783 300348 : if( conn->state == FD_QUIC_CONN_STATE_INVALID ) {
784 318 : FD_TEST( conn->svc_type==UINT_MAX );
785 318 : FD_TEST( conn->svc_prev==UINT_MAX );
786 318 : continue;
787 318 : }
788 300348 : }
789 :
790 45 : fd_quic_svc_queue_validate( quic, FD_QUIC_SVC_INSTANT );
791 45 : fd_quic_svc_queue_validate( quic, FD_QUIC_SVC_ACK_TX );
792 45 : fd_quic_svc_queue_validate( quic, FD_QUIC_SVC_WAIT );
793 :
794 300393 : for( ulong j=0UL; j < quic->limits.conn_cnt; j++ ) {
795 300348 : fd_quic_conn_t * conn = fd_quic_conn_at_idx( state, j );
796 300348 : FD_TEST( conn->conn_idx==j );
797 300348 : if( conn->state == FD_QUIC_CONN_STATE_INVALID ) {
798 318 : FD_TEST( conn->svc_type==UINT_MAX );
799 318 : FD_TEST( conn->svc_prev==UINT_MAX );
800 318 : FD_TEST( !conn->visited );
801 318 : continue;
802 318 : }
803 300030 : FD_TEST( conn->visited ); /* if assertion fails, the conn was leaked */
804 300030 : }
805 :
806 45 : fd_quic_conn_free_validate( quic );
807 300393 : for( ulong j=0UL; j < quic->limits.conn_cnt; j++ ) {
808 300348 : fd_quic_conn_t * conn = fd_quic_conn_at_idx( state, j );
809 300348 : FD_TEST( conn->conn_idx==j );
810 300348 : FD_TEST( conn->visited );
811 300348 : }
812 45 : }
813 :
814 : /* Helpers for generating fd_quic_log entries */
815 :
816 : static fd_quic_log_hdr_t
817 0 : fd_quic_log_conn_hdr( fd_quic_conn_t const * conn ) {
818 0 : fd_quic_log_hdr_t hdr = {
819 0 : .conn_id = conn->our_conn_id,
820 0 : .flags = 0
821 0 : };
822 0 : return hdr;
823 0 : }
824 :
825 : static fd_quic_log_hdr_t
826 : fd_quic_log_full_hdr( fd_quic_conn_t const * conn,
827 90 : fd_quic_pkt_t const * pkt ) {
828 90 : fd_quic_log_hdr_t hdr = {
829 90 : .conn_id = conn->our_conn_id,
830 90 : .pkt_num = pkt->pkt_number,
831 90 : .ip4_saddr = pkt->ip4->saddr,
832 90 : .udp_sport = pkt->udp->net_sport,
833 90 : .enc_level = (uchar)pkt->enc_level,
834 90 : .flags = 0
835 90 : };
836 90 : return hdr;
837 90 : }
838 :
839 : /* fd_quic_conn_error sets the connection state to aborted. This does
840 : not destroy the connection object. Rather, it will eventually cause
841 : the connection to be freed during a later fd_quic_service call.
842 : reason is an RFC 9000 QUIC error code. error_line is the source line
843 : of code in fd_quic.c */
844 :
845 : static void
846 : fd_quic_conn_error1( fd_quic_conn_t * conn,
847 90 : uint reason ) {
848 90 : if( FD_UNLIKELY( !conn || conn->state == FD_QUIC_CONN_STATE_DEAD ) ) return;
849 :
850 90 : fd_quic_set_conn_state( conn, FD_QUIC_CONN_STATE_ABORT );
851 90 : conn->reason = reason;
852 :
853 : /* set connection to be serviced ASAP */
854 90 : fd_quic_svc_schedule1( conn, FD_QUIC_SVC_INSTANT );
855 90 : }
856 :
857 : static void
858 : fd_quic_conn_error( fd_quic_conn_t * conn,
859 : uint reason,
860 0 : uint error_line ) {
861 0 : fd_quic_conn_error1( conn, reason );
862 :
863 0 : fd_quic_state_t * state = fd_quic_get_state( conn->quic );
864 :
865 0 : ulong sig = fd_quic_log_sig( FD_QUIC_EVENT_CONN_QUIC_CLOSE );
866 0 : fd_quic_log_error_t * frame = fd_quic_log_tx_prepare( state->log_tx );
867 0 : *frame = (fd_quic_log_error_t) {
868 0 : .hdr = fd_quic_log_conn_hdr( conn ),
869 0 : .code = { reason, 0UL },
870 0 : .src_file = "fd_quic.c",
871 0 : .src_line = error_line,
872 0 : };
873 0 : fd_quic_log_tx_submit( state->log_tx, sizeof(fd_quic_log_error_t), sig, (long)state->now );
874 0 : }
875 :
876 : static void
877 : fd_quic_frame_error( fd_quic_frame_ctx_t const * ctx,
878 : uint reason,
879 90 : uint error_line ) {
880 90 : fd_quic_t * quic = ctx->quic;
881 90 : fd_quic_conn_t * conn = ctx->conn;
882 90 : fd_quic_pkt_t const * pkt = ctx->pkt;
883 90 : fd_quic_state_t * state = fd_quic_get_state( quic );
884 :
885 90 : fd_quic_conn_error1( conn, reason );
886 :
887 90 : uint tls_reason = 0U;
888 90 : if( conn->tls_hs ) tls_reason = conn->tls_hs->hs.base.reason;
889 :
890 90 : ulong sig = fd_quic_log_sig( FD_QUIC_EVENT_CONN_QUIC_CLOSE );
891 90 : fd_quic_log_error_t * frame = fd_quic_log_tx_prepare( state->log_tx );
892 90 : *frame = (fd_quic_log_error_t) {
893 90 : .hdr = fd_quic_log_full_hdr( conn, pkt ),
894 90 : .code = { reason, tls_reason },
895 90 : .src_file = "fd_quic.c",
896 90 : .src_line = error_line,
897 90 : };
898 90 : fd_quic_log_tx_submit( state->log_tx, sizeof(fd_quic_log_error_t), sig, (long)state->now );
899 90 : }
900 :
901 : /* returns the encoding level we should use for the next tx quic packet
902 : or all 1's if nothing to tx */
903 : static uint
904 27128699 : fd_quic_tx_enc_level( fd_quic_conn_t * conn, int acks ) {
905 27128699 : uint enc_level = ~0u;
906 :
907 27128699 : uint app_pn_space = fd_quic_enc_level_to_pn_space( fd_quic_enc_level_appdata_id );
908 27128699 : ulong app_pkt_number = conn->pkt_number[app_pn_space];
909 :
910 : /* fd_quic_tx_enc_level( ... )
911 : check status - if closing, set based on handshake complete
912 : check for acks
913 : find lowest enc level
914 : check for hs_data
915 : find lowest enc level
916 : if any, use lowest
917 : else
918 : if stream data, use 1-rtt
919 : else
920 : nothing to do */
921 :
922 : /* check status */
923 27128699 : switch( conn->state ) {
924 0 : case FD_QUIC_CONN_STATE_DEAD:
925 : /* do not send on dead connection at all */
926 0 : return ~0u;
927 :
928 168 : case FD_QUIC_CONN_STATE_ABORT:
929 12216 : case FD_QUIC_CONN_STATE_CLOSE_PENDING:
930 : /* use handshake or app enc level depending on handshake complete */
931 12216 : if( !(conn->flags & FD_QUIC_CONN_FLAGS_CLOSE_SENT ) ) {
932 6108 : if( conn->handshake_complete ) {
933 6024 : return fd_quic_enc_level_appdata_id;
934 6024 : } else if( fd_uint_extract_bit( conn->keys_avail, fd_quic_enc_level_handshake_id ) ) {
935 0 : return fd_quic_enc_level_handshake_id;
936 84 : } else if( fd_uint_extract_bit( conn->keys_avail, fd_quic_enc_level_initial_id ) ) {
937 84 : return fd_quic_enc_level_initial_id;
938 84 : }
939 6108 : }
940 6108 : return ~0u;
941 :
942 : /* TODO consider this optimization... but we want to ack all handshakes, even if there is stream_data */
943 27062330 : case FD_QUIC_CONN_STATE_ACTIVE:
944 27062330 : if( FD_LIKELY( !conn->tls_hs ) ) {
945 : /* optimization for case where we have stream data to send */
946 :
947 : /* find stream data to send */
948 27050288 : fd_quic_stream_t * sentinel = conn->send_streams;
949 27050288 : fd_quic_stream_t * stream = sentinel->next;
950 27050288 : if( !stream->sentinel && stream->upd_pkt_number >= app_pkt_number ) {
951 13294339 : return fd_quic_enc_level_appdata_id;
952 13294339 : }
953 27050288 : }
954 27128699 : }
955 :
956 : /* pick enc_level of oldest ACK not yet sent */
957 13822144 : fd_quic_ack_gen_t * ack_gen = conn->ack_gen;
958 13822144 : fd_quic_ack_t const * oldest_ack = fd_quic_ack_queue_ele( ack_gen, ack_gen->tail );
959 13822144 : uint ack_enc_level = oldest_ack->enc_level; /* speculative load (might be invalid) */
960 13822144 : if( ack_gen->head != ack_gen->tail && acks ) {
961 257187 : return ack_enc_level;
962 257187 : }
963 :
964 : /* Check for handshake data to send */
965 13564957 : uint peer_enc_level = conn->peer_enc_level;
966 13564957 : if( FD_UNLIKELY( conn->tls_hs ) ) {
967 42153 : fd_quic_tls_hs_data_t * hs_data = NULL;
968 :
969 138501 : for( uint i = peer_enc_level; i < 4 && i < enc_level; ++i ) {
970 108393 : if( enc_level == ~0u || enc_level == i ) {
971 108393 : hs_data = fd_quic_tls_get_hs_data( conn->tls_hs, i );
972 108393 : if( hs_data ) {
973 : /* offset within stream */
974 42153 : ulong offset = conn->hs_sent_bytes[i];
975 : /* skip packets we've sent */
976 90324 : while( hs_data && hs_data->offset + hs_data->data_sz <= offset ) {
977 48171 : hs_data = fd_quic_tls_get_next_hs_data( conn->tls_hs, hs_data );
978 48171 : }
979 42153 : if( hs_data ) {
980 12045 : enc_level = i;
981 12045 : return enc_level;
982 12045 : }
983 42153 : }
984 108393 : }
985 108393 : }
986 42153 : }
987 :
988 : /* if we have acks to send or handshake data, then use that enc_level */
989 13552912 : if( enc_level != ~0u ) return enc_level;
990 :
991 : /* handshake done? */
992 13552912 : if( FD_UNLIKELY( conn->handshake_done_send ) ) return fd_quic_enc_level_appdata_id;
993 :
994 : /* find stream data to send */
995 13546891 : fd_quic_stream_t * sentinel = conn->send_streams;
996 13546891 : fd_quic_stream_t * stream = sentinel->next;
997 13546891 : if( !stream->sentinel && stream->upd_pkt_number >= app_pkt_number ) {
998 0 : return fd_quic_enc_level_appdata_id;
999 0 : }
1000 :
1001 13546891 : if( conn->flags && conn->upd_pkt_number >= app_pkt_number ) {
1002 6081 : return fd_quic_enc_level_appdata_id;
1003 6081 : }
1004 :
1005 : /* nothing to send */
1006 13540810 : return ~0u;
1007 13546891 : }
1008 :
1009 : /* Include frame code generator */
1010 :
1011 : #include "templ/fd_quic_frame.c"
1012 :
1013 : /* handle single v1 frames */
1014 : /* returns bytes consumed */
1015 : ulong
1016 : fd_quic_handle_v1_frame( fd_quic_t * quic,
1017 : fd_quic_conn_t * conn,
1018 : fd_quic_pkt_t * pkt,
1019 : uint pkt_type,
1020 : uchar const * buf,
1021 92370663 : ulong buf_sz ) {
1022 92370663 : if( conn->state == FD_QUIC_CONN_STATE_DEAD ) return FD_QUIC_PARSE_FAIL;
1023 92370663 : if( FD_UNLIKELY( buf_sz<1UL ) ) return FD_QUIC_PARSE_FAIL;
1024 :
1025 : /* Frame ID is technically a varint but it's sufficient to look at the
1026 : first byte. */
1027 92370663 : uint id = buf[0];
1028 :
1029 92370663 : FD_DTRACE_PROBE_4( quic_handle_frame, id, conn->our_conn_id, pkt_type, pkt->pkt_number );
1030 :
1031 92370663 : fd_quic_frame_ctx_t frame_context[1] = {{ quic, conn, pkt }};
1032 92370663 : if( FD_UNLIKELY( !fd_quic_frame_type_allowed( pkt_type, id ) ) ) {
1033 51 : FD_DTRACE_PROBE_4( quic_err_frame_not_allowed, id, conn->our_conn_id, pkt_type, pkt->pkt_number );
1034 51 : fd_quic_frame_error( frame_context, FD_QUIC_CONN_REASON_PROTOCOL_VIOLATION, __LINE__ );
1035 51 : return FD_QUIC_PARSE_FAIL;
1036 51 : }
1037 92370612 : quic->metrics.frame_rx_cnt[ fd_quic_frame_metric_id[ id ] ]++;
1038 :
1039 92370612 : pkt->ack_flag |= fd_uint_if( fd_quic_frame_type_flags[ id ]&FD_QUIC_FRAME_FLAG_N, 0U, ACK_FLAG_RQD );
1040 :
1041 : /* tail call to frame handler */
1042 92370612 : switch( id ) {
1043 :
1044 0 : # define F(T,MID,NAME,...) \
1045 92370612 : case T: return fd_quic_interpret_##NAME##_frame( frame_context, buf, buf_sz );
1046 92370612 : FD_QUIC_FRAME_TYPES(F)
1047 0 : # undef F
1048 :
1049 0 : default:
1050 : /* FIXME this should be unreachable, but gracefully handle this case as defense-in-depth */
1051 : /* unknown frame types are PROTOCOL_VIOLATION errors */
1052 0 : FD_DEBUG( FD_LOG_DEBUG(( "unexpected frame type: %u", id )); )
1053 0 : fd_quic_frame_error( frame_context, FD_QUIC_CONN_REASON_PROTOCOL_VIOLATION, __LINE__ );
1054 0 : return FD_QUIC_PARSE_FAIL;
1055 92370612 : }
1056 :
1057 92370612 : }
1058 :
1059 : fd_quic_t *
1060 3324 : fd_quic_fini( fd_quic_t * quic ) {
1061 :
1062 3324 : if( FD_UNLIKELY( !quic ) ) {
1063 0 : FD_LOG_WARNING(("NULL quic"));
1064 0 : return NULL;
1065 0 : }
1066 :
1067 : /* Derive memory layout */
1068 :
1069 3324 : fd_quic_layout_t layout = {0};
1070 3324 : fd_quic_footprint_ext( &quic->limits, &layout );
1071 :
1072 3324 : fd_quic_state_t * state = fd_quic_get_state( quic );
1073 :
1074 : /* Free conns */
1075 :
1076 3324 : ulong conn_laddr = (ulong)quic + layout.conns_off;
1077 19758 : for( ulong i=0; i < quic->limits.conn_cnt; i++ ) {
1078 16434 : fd_quic_conn_t * conn = (fd_quic_conn_t *)( conn_laddr );
1079 16434 : conn_laddr += layout.conn_footprint;
1080 :
1081 16434 : if( conn->state ) fd_quic_conn_free( quic, conn );
1082 16434 : }
1083 :
1084 : /* Deinit TLS */
1085 :
1086 3324 : fd_quic_tls_hs_pool_delete( fd_quic_tls_hs_pool_leave( state->hs_pool ) ); state->hs_pool = NULL;
1087 3324 : fd_quic_tls_delete( state->tls );
1088 3324 : fd_quic_tls_hs_cache_delete( fd_quic_tls_hs_cache_leave( &state->hs_cache ) );
1089 :
1090 :
1091 : /* Delete conn ID map */
1092 :
1093 3324 : fd_quic_conn_map_delete( fd_quic_conn_map_leave( state->conn_map ) );
1094 3324 : state->conn_map = NULL;
1095 :
1096 : /* Clear join-lifetime memory regions */
1097 :
1098 3324 : memset( state, 0, sizeof(fd_quic_state_t) );
1099 :
1100 3324 : return quic;
1101 3324 : }
1102 :
1103 : void *
1104 2136 : fd_quic_delete( fd_quic_t * quic ) {
1105 :
1106 2136 : if( FD_UNLIKELY( !quic ) ) {
1107 0 : FD_LOG_WARNING(( "NULL quic" ));
1108 0 : return NULL;
1109 0 : }
1110 :
1111 2136 : if( FD_UNLIKELY( !fd_ulong_is_aligned( (ulong)quic, fd_quic_align() ) ) ) {
1112 0 : FD_LOG_WARNING(( "misaligned quic" ));
1113 0 : return NULL;
1114 0 : }
1115 :
1116 2136 : if( FD_UNLIKELY( quic->magic!=FD_QUIC_MAGIC ) ) {
1117 0 : FD_LOG_WARNING(( "bad magic" ));
1118 0 : return NULL;
1119 0 : }
1120 :
1121 2136 : void * shmlog = (void *)( (ulong)quic + quic->layout.log_off );
1122 2136 : if( FD_UNLIKELY( !fd_quic_log_buf_delete( shmlog ) ) ) {
1123 0 : FD_LOG_WARNING(( "fd_quic_log_buf_delete failed" ));
1124 0 : return NULL;
1125 0 : }
1126 :
1127 2136 : FD_COMPILER_MFENCE();
1128 2136 : FD_VOLATILE( quic->magic ) = 0UL;
1129 2136 : FD_COMPILER_MFENCE();
1130 :
1131 2136 : return (void *)quic;
1132 2136 : }
1133 :
1134 : fd_quic_stream_t *
1135 13283461 : fd_quic_conn_new_stream( fd_quic_conn_t * conn ) {
1136 13283461 : if( FD_UNLIKELY( !conn->stream_map ) ) {
1137 : /* QUIC config is receive-only */
1138 0 : return NULL;
1139 0 : }
1140 :
1141 13283461 : fd_quic_t * quic = conn->quic;
1142 13283461 : fd_quic_state_t * state = fd_quic_get_state( quic );
1143 13283461 : if( FD_UNLIKELY( !state->stream_pool ) ) return NULL;
1144 :
1145 13283461 : ulong next_stream_id = conn->tx_next_stream_id;
1146 :
1147 : /* The user is responsible for calling this, for setting limits, */
1148 : /* and for setting stream_pool size */
1149 : /* Only current use cases for QUIC client is for testing */
1150 : /* So leaving this question unanswered for now */
1151 :
1152 : /* peer imposed limit on streams */
1153 13283461 : ulong peer_sup_stream_id = conn->tx_sup_stream_id;
1154 :
1155 : /* is connection inactive */
1156 13283461 : if( FD_UNLIKELY( conn->state != FD_QUIC_CONN_STATE_ACTIVE ||
1157 13283461 : next_stream_id >= peer_sup_stream_id ) ) {
1158 : /* this is a normal condition which occurs whenever we run up to
1159 : the peer advertised limit and represents one form of flow control */
1160 0 : return NULL;
1161 0 : }
1162 :
1163 : /* obtain a stream from stream_pool */
1164 13283461 : fd_quic_stream_t * stream = fd_quic_stream_pool_alloc( state->stream_pool );
1165 :
1166 13283461 : if( FD_UNLIKELY( !stream ) ) {
1167 : /* no streams available in the stream pool */
1168 0 : return NULL;
1169 0 : }
1170 :
1171 : /* add to map of stream ids */
1172 13283461 : fd_quic_stream_map_t * entry = fd_quic_stream_map_insert( conn->stream_map, next_stream_id );
1173 13283461 : if( FD_UNLIKELY( !entry ) ) {
1174 : /* return stream to pool */
1175 0 : fd_quic_stream_pool_free( state->stream_pool, stream );
1176 0 : return NULL;
1177 0 : }
1178 :
1179 13283461 : fd_quic_stream_init( stream );
1180 13283461 : FD_QUIC_STREAM_LIST_INIT_STREAM( stream );
1181 :
1182 : /* stream tx_buf already set */
1183 13283461 : stream->conn = conn;
1184 13283461 : stream->stream_id = next_stream_id;
1185 13283461 : stream->context = NULL;
1186 :
1187 : /* set the max stream data to the appropriate initial value */
1188 13283461 : stream->tx_max_stream_data = conn->tx_initial_max_stream_data_uni;
1189 :
1190 : /* set state depending on stream type */
1191 13283461 : stream->state = FD_QUIC_STREAM_STATE_RX_FIN;
1192 13283461 : stream->stream_flags = 0u;
1193 :
1194 13283461 : memset( stream->tx_ack, 0, stream->tx_buf.cap >> 3ul );
1195 :
1196 : /* insert into used streams */
1197 13283461 : FD_QUIC_STREAM_LIST_REMOVE( stream );
1198 13283461 : FD_QUIC_STREAM_LIST_INSERT_BEFORE( conn->used_streams, stream );
1199 :
1200 : /* generate a new stream id */
1201 13283461 : conn->tx_next_stream_id = next_stream_id + 4U;
1202 :
1203 : /* assign the stream to the entry */
1204 13283461 : entry->stream = stream;
1205 :
1206 : /* update metrics */
1207 13283461 : quic->metrics.stream_opened_cnt++;
1208 13283461 : quic->metrics.stream_active_cnt++;
1209 :
1210 13283461 : FD_DEBUG( FD_LOG_DEBUG(( "Created stream with ID %lu", next_stream_id )) );
1211 13283461 : return stream;
1212 13283461 : }
1213 :
1214 : int
1215 : fd_quic_stream_send( fd_quic_stream_t * stream,
1216 : void const * data,
1217 : ulong data_sz,
1218 13283536 : int fin ) {
1219 13283536 : if( FD_UNLIKELY( stream->state & FD_QUIC_STREAM_STATE_TX_FIN ) ) {
1220 0 : return FD_QUIC_SEND_ERR_FIN;
1221 0 : }
1222 :
1223 13283536 : fd_quic_conn_t * conn = stream->conn;
1224 :
1225 13283536 : fd_quic_buffer_t * tx_buf = &stream->tx_buf;
1226 :
1227 : /* are we allowed to send? */
1228 13283536 : ulong stream_id = stream->stream_id;
1229 :
1230 : /* stream_id & 2 == 0 is bidir
1231 : stream_id & 1 == 0 is client */
1232 13283536 : if( FD_UNLIKELY( ( ( (uint)stream_id & 2u ) == 2u ) &
1233 13283536 : ( ( (uint)stream_id & 1u ) != (uint)conn->server ) ) ) {
1234 0 : return FD_QUIC_SEND_ERR_INVAL_STREAM;
1235 0 : }
1236 :
1237 13283536 : if( FD_UNLIKELY( conn->state != FD_QUIC_CONN_STATE_ACTIVE ) ) {
1238 0 : if( conn->state == FD_QUIC_CONN_STATE_HANDSHAKE ||
1239 0 : conn->state == FD_QUIC_CONN_STATE_HANDSHAKE_COMPLETE ) {
1240 0 : return FD_QUIC_SEND_ERR_STREAM_STATE;
1241 0 : }
1242 0 : return FD_QUIC_SEND_ERR_INVAL_CONN;
1243 0 : }
1244 :
1245 : /* how many bytes are we allowed to send on the stream and on the connection? */
1246 13283536 : ulong allowed_stream = stream->tx_max_stream_data - stream->tx_tot_data;
1247 13283536 : ulong allowed_conn = conn->tx_max_data - conn->tx_tot_data;
1248 13283536 : ulong allowed = fd_ulong_min( allowed_conn, allowed_stream );
1249 :
1250 13283536 : if( data_sz > fd_quic_buffer_avail( tx_buf ) ) {
1251 0 : return FD_QUIC_SEND_ERR_FLOW;
1252 0 : }
1253 :
1254 13283536 : if( data_sz > allowed ) {
1255 0 : return FD_QUIC_SEND_ERR_FLOW;
1256 0 : }
1257 :
1258 : /* store data from data into tx_buf
1259 : this stores, but does not move the head offset */
1260 13283536 : fd_quic_buffer_store( tx_buf, data, data_sz );
1261 :
1262 : /* advance head */
1263 13283536 : tx_buf->head += data_sz;
1264 :
1265 : /* adjust flow control limits on stream and connection */
1266 13283536 : stream->tx_tot_data += data_sz;
1267 13283536 : conn->tx_tot_data += data_sz;
1268 :
1269 : /* insert into send list */
1270 13283536 : if( !FD_QUIC_STREAM_ACTION( stream ) ) {
1271 13283536 : FD_QUIC_STREAM_LIST_REMOVE( stream );
1272 13283536 : FD_QUIC_STREAM_LIST_INSERT_BEFORE( conn->send_streams, stream );
1273 13283536 : }
1274 13283536 : stream->stream_flags |= FD_QUIC_STREAM_FLAGS_UNSENT; /* we have unsent data */
1275 13283536 : stream->upd_pkt_number = FD_QUIC_PKT_NUM_PENDING; /* schedule tx */
1276 :
1277 : /* don't actually set fin flag if we didn't add the last
1278 : byte to the buffer */
1279 13283536 : if( fin ) {
1280 13283437 : fd_quic_stream_fin( stream );
1281 13283437 : }
1282 :
1283 : /* schedule send */
1284 13283536 : fd_quic_svc_schedule1( conn, FD_QUIC_SVC_INSTANT );
1285 :
1286 13283536 : return FD_QUIC_SUCCESS;
1287 13283536 : }
1288 :
1289 : void
1290 13283437 : fd_quic_stream_fin( fd_quic_stream_t * stream ) {
1291 13283437 : if( FD_UNLIKELY( stream->state & FD_QUIC_STREAM_STATE_TX_FIN ) ) {
1292 0 : return;
1293 0 : }
1294 :
1295 13283437 : fd_quic_conn_t * conn = stream->conn;
1296 :
1297 : /* insert into send list */
1298 13283437 : if( !FD_QUIC_STREAM_ACTION( stream ) ) {
1299 0 : FD_QUIC_STREAM_LIST_REMOVE( stream );
1300 0 : FD_QUIC_STREAM_LIST_INSERT_BEFORE( conn->send_streams, stream );
1301 0 : }
1302 13283437 : stream->stream_flags |= FD_QUIC_STREAM_FLAGS_TX_FIN; /* state immediately updated */
1303 13283437 : stream->state |= FD_QUIC_STREAM_STATE_TX_FIN; /* state immediately updated */
1304 13283437 : stream->upd_pkt_number = FD_QUIC_PKT_NUM_PENDING; /* update to be sent in next packet */
1305 :
1306 : /* TODO update metrics */
1307 13283437 : }
1308 :
1309 : void
1310 0 : fd_quic_conn_set_rx_max_data( fd_quic_conn_t * conn, ulong rx_max_data ) {
1311 : /* cannot reduce max_data, and cannot increase beyond max varint */
1312 0 : if( rx_max_data > conn->srx->rx_max_data && rx_max_data < (1UL<<62)-1UL ) {
1313 0 : conn->srx->rx_max_data = rx_max_data;
1314 0 : conn->flags |= FD_QUIC_CONN_FLAGS_MAX_DATA;
1315 0 : conn->upd_pkt_number = FD_QUIC_PKT_NUM_PENDING;
1316 0 : fd_quic_svc_schedule1( conn, FD_QUIC_SVC_INSTANT );
1317 0 : }
1318 0 : }
1319 :
1320 : /* packet processing */
1321 :
1322 : /* fd_quic_abandon_enc_level frees all resources associated encryption
1323 : levels less or equal to enc_level. Returns the number of freed
1324 : pkt_meta. */
1325 :
1326 : ulong
1327 : fd_quic_abandon_enc_level( fd_quic_conn_t * conn,
1328 30105 : uint enc_level ) {
1329 30105 : if( FD_LIKELY( !fd_uint_extract_bit( conn->keys_avail, (int)enc_level ) ) ) return 0UL;
1330 24084 : FD_DEBUG( FD_LOG_DEBUG(( "conn=%p abandoning enc_level=%u", (void *)conn, enc_level )); )
1331 :
1332 24084 : ulong freed = 0UL;
1333 :
1334 24084 : fd_quic_ack_gen_abandon_enc_level( conn->ack_gen, enc_level );
1335 :
1336 24084 : fd_quic_pkt_meta_tracker_t * tracker = &conn->pkt_meta_tracker;
1337 24084 : fd_quic_pkt_meta_t * pool = tracker->pool;
1338 :
1339 72252 : for( uint j = 0; j <= enc_level; ++j ) {
1340 48168 : conn->keys_avail = fd_uint_clear_bit( conn->keys_avail, (int)j );
1341 : /* treat all packets as ACKed (freeing handshake data, etc.) */
1342 48168 : fd_quic_pkt_meta_ds_t * sent = &tracker->sent_pkt_metas[j];
1343 :
1344 48168 : fd_quic_pkt_meta_t * prev = NULL;
1345 48168 : for( fd_quic_pkt_meta_ds_fwd_iter_t iter = fd_quic_pkt_meta_treap_fwd_iter_init( sent, pool );
1346 60213 : !fd_quic_pkt_meta_ds_fwd_iter_done( iter );
1347 48168 : iter = fd_quic_pkt_meta_ds_fwd_iter_next( iter, pool ) ) {
1348 12045 : fd_quic_pkt_meta_t * e = fd_quic_pkt_meta_ds_fwd_iter_ele( iter, pool );
1349 12045 : if( FD_LIKELY( prev ) ) {
1350 0 : fd_quic_pkt_meta_pool_ele_release( pool, prev );
1351 0 : }
1352 12045 : fd_quic_reclaim_pkt_meta( conn, e, j );
1353 12045 : prev = e;
1354 12045 : }
1355 48168 : if( FD_LIKELY( prev ) ) {
1356 12045 : fd_quic_pkt_meta_pool_ele_release( pool, prev );
1357 12045 : }
1358 :
1359 48168 : freed += fd_quic_pkt_meta_ds_ele_cnt( sent );
1360 48168 : conn->used_pkt_meta -= fd_quic_pkt_meta_ds_ele_cnt( sent );
1361 48168 : fd_quic_pkt_meta_ds_clear( tracker, j );
1362 48168 : }
1363 :
1364 24084 : return freed;
1365 30105 : }
1366 :
1367 : static void
1368 : fd_quic_gen_initial_secret_and_keys(
1369 : fd_quic_conn_t * conn,
1370 : fd_quic_conn_id_t const * dst_conn_id,
1371 6057 : int is_server ) {
1372 :
1373 6057 : fd_quic_gen_initial_secrets(
1374 6057 : &conn->secrets,
1375 6057 : dst_conn_id->conn_id, dst_conn_id->sz,
1376 6057 : is_server );
1377 :
1378 6057 : fd_quic_gen_keys(
1379 6057 : &conn->keys[ fd_quic_enc_level_initial_id ][ 0 ],
1380 6057 : conn->secrets.secret[ fd_quic_enc_level_initial_id ][ 0 ] );
1381 :
1382 6057 : fd_quic_gen_keys(
1383 6057 : &conn->keys[ fd_quic_enc_level_initial_id ][ 1 ],
1384 6057 : conn->secrets.secret[ fd_quic_enc_level_initial_id ][ 1 ] );
1385 6057 : }
1386 :
1387 : static ulong
1388 : fd_quic_send_retry( fd_quic_t * quic,
1389 : fd_quic_pkt_t * pkt,
1390 : fd_quic_conn_id_t const * odcid,
1391 : fd_quic_conn_id_t const * scid,
1392 105 : ulong new_conn_id ) {
1393 :
1394 105 : fd_quic_state_t * state = fd_quic_get_state( quic );
1395 :
1396 105 : ulong expire_at = state->now + quic->config.retry_ttl;
1397 105 : uchar retry_pkt[ FD_QUIC_RETRY_LOCAL_SZ ];
1398 105 : ulong retry_pkt_sz = fd_quic_retry_create( retry_pkt, pkt, state->_rng, state->retry_secret, state->retry_iv, odcid, scid, new_conn_id, expire_at );
1399 :
1400 105 : quic->metrics.retry_tx_cnt++;
1401 :
1402 105 : uchar * tx_ptr = retry_pkt + retry_pkt_sz;
1403 105 : if( FD_UNLIKELY( fd_quic_tx_buffered_raw(
1404 105 : quic,
1405 : // these are state variable's normally updated on a conn, but irrelevant in retry so we
1406 : // just size it exactly as the encoded retry packet
1407 105 : &tx_ptr,
1408 105 : retry_pkt,
1409 : // encode buffer
1410 105 : &pkt->ip4->net_id,
1411 105 : pkt->ip4->saddr,
1412 105 : pkt->udp->net_sport,
1413 105 : pkt->ip4->daddr,
1414 105 : pkt->udp->net_dport ) == FD_QUIC_FAILED ) ) {
1415 0 : return FD_QUIC_PARSE_FAIL;
1416 0 : }
1417 105 : return 0UL;
1418 105 : }
1419 :
1420 : /* fd_quic_tls_hs_cache_evict evicts the oldest tls_hs if it's exceeded its ttl
1421 : Assumes cache is non-empty
1422 : and returns 1 if evicted, otherwise returns 0. */
1423 : static int
1424 : fd_quic_tls_hs_cache_evict( fd_quic_t * quic,
1425 6 : fd_quic_state_t * state ) {
1426 :
1427 6 : fd_quic_tls_hs_t* hs_to_free = fd_quic_tls_hs_cache_ele_peek_head( &state->hs_cache, state->hs_pool );
1428 :
1429 6 : if( state->now < hs_to_free->birthtime + quic->config.tls_hs_ttl ) {
1430 : /* oldest is too young to evict */
1431 3 : quic->metrics.hs_err_alloc_fail_cnt++;
1432 3 : return 0;
1433 3 : }
1434 :
1435 3 : fd_quic_conn_free( quic, hs_to_free->context );
1436 3 : quic->metrics.hs_evicted_cnt++;
1437 3 : return 1;
1438 6 : }
1439 :
1440 : /* fd_quic_handle_v1_initial handles an "Initial"-type packet.
1441 : Valid for both server and client. Initial packets are used to
1442 : establish QUIC conns and wrap the TLS handshake flow among other
1443 : things. */
1444 :
1445 : ulong
1446 : fd_quic_handle_v1_initial( fd_quic_t * quic,
1447 : fd_quic_conn_t ** p_conn,
1448 : fd_quic_pkt_t * pkt,
1449 : fd_quic_conn_id_t const * dcid,
1450 : fd_quic_conn_id_t const * peer_scid,
1451 : uchar * cur_ptr,
1452 15525 : ulong cur_sz ) {
1453 15525 : fd_quic_conn_t * conn = *p_conn;
1454 15525 : if( FD_UNLIKELY( conn &&
1455 15525 : ( conn->state==FD_QUIC_CONN_STATE_INVALID ||
1456 15525 : !fd_uint_extract_bit( conn->keys_avail, fd_quic_enc_level_initial_id ) ) ) ) {
1457 3 : quic->metrics.pkt_no_key_cnt[ fd_quic_enc_level_initial_id ]++;
1458 3 : return FD_QUIC_PARSE_FAIL;
1459 3 : }
1460 :
1461 15522 : fd_quic_state_t * state = fd_quic_get_state( quic );
1462 15522 : fd_quic_metrics_t * metrics = &quic->metrics;
1463 :
1464 : /* Initial packets are de-facto unencrypted. Packet protection is
1465 : still applied, albeit with publicly known encryption keys.
1466 :
1467 : RFC 9001 specifies use of the TLS_AES_128_GCM_SHA256_ID suite for
1468 : initial secrets and keys. */
1469 :
1470 : /* Parse initial packet */
1471 :
1472 15522 : fd_quic_initial_t initial[1] = {0};
1473 15522 : ulong rc = fd_quic_decode_initial( initial, cur_ptr, cur_sz );
1474 15522 : if( FD_UNLIKELY( rc == FD_QUIC_PARSE_FAIL ) ) {
1475 1494 : FD_DEBUG( FD_LOG_DEBUG(( "fd_quic_decode_initial failed" )) );
1476 1494 : return FD_QUIC_PARSE_FAIL;
1477 1494 : }
1478 :
1479 : /* Check bounds on initial */
1480 :
1481 : /* len indicated the number of bytes after the packet number offset
1482 : so verify this value is within the packet */
1483 14028 : ulong pn_offset = initial->pkt_num_pnoff;
1484 14028 : ulong body_sz = initial->len; /* length of packet number, frames, and auth tag */
1485 14028 : ulong tot_sz = pn_offset + body_sz;
1486 14028 : if( FD_UNLIKELY( tot_sz > cur_sz ) ) {
1487 66 : FD_DEBUG( FD_LOG_DEBUG(( "Bogus initial packet length" )) );
1488 66 : return FD_QUIC_PARSE_FAIL;
1489 66 : }
1490 :
1491 : /* Check it is valid for a token to be present in an initial packet in the current context.
1492 :
1493 : quic->config.role == FD_QUIC_ROLE_CLIENT
1494 : - Indicates the client received an initial packet with a token from a server. "Initial packets
1495 : sent by the server MUST set the Token Length field to 0; clients that receive an Initial packet
1496 : with a non-zero Token Length field MUST either discard the packet or generate a connection
1497 : error of type PROTOCOL_VIOLATION (RFC 9000, Section 17.2.2)"
1498 :
1499 : quic->config.retry == false
1500 : - Indicates the server is not configured to retry, but a client attached a token to this
1501 : initial packet. NEW_TOKEN frames are not supported, so this implementation treats the presence
1502 : of a token when retry is disabled as an error. */
1503 13962 : if( FD_UNLIKELY( initial->token_len > 0 &&
1504 13962 : ( quic->config.role == FD_QUIC_ROLE_CLIENT || !quic->config.retry ) ) ) {
1505 21 : FD_DEBUG( FD_LOG_DEBUG(( "Rejecting initial with token" )); )
1506 21 : return FD_QUIC_PARSE_FAIL;
1507 21 : }
1508 :
1509 :
1510 13941 : ulong scid; /* outgoing scid */
1511 13941 : fd_quic_conn_id_t odcid; /* dst conn id from client's original Initial */
1512 :
1513 : /* Do we have a conn object for this dest conn ID?
1514 : If not, sanity check, send/verify retry if needed */
1515 13941 : if( FD_UNLIKELY( !conn ) ) {
1516 : /* if we're a client, and no conn, discard */
1517 7920 : if( quic->config.role == FD_QUIC_ROLE_CLIENT ) {
1518 : /* connection may have been torn down */
1519 774 : FD_DEBUG( FD_LOG_DEBUG(( "unknown connection ID" )); )
1520 774 : metrics->pkt_no_conn_cnt++;
1521 774 : return FD_QUIC_PARSE_FAIL;
1522 774 : }
1523 :
1524 : /* According to RFC 9000 Section 14.1, INITIAL packets less than a
1525 : certain length must be discarded, and the connection may be closed.
1526 : (Mitigates UDP amplification) */
1527 7146 : if( pkt->datagram_sz < FD_QUIC_INITIAL_PAYLOAD_SZ_MIN ) {
1528 : /* can't trust the included values, so can't reply */
1529 735 : return FD_QUIC_PARSE_FAIL;
1530 735 : }
1531 :
1532 : /* Early check: Is conn free? */
1533 6411 : if( FD_UNLIKELY( state->free_conn_list==UINT_MAX ) ) {
1534 0 : FD_DEBUG( FD_LOG_DEBUG(( "ignoring conn request: no free conn slots" )) );
1535 0 : metrics->conn_err_no_slots_cnt++;
1536 0 : return FD_QUIC_PARSE_FAIL; /* FIXME better error code? */
1537 0 : }
1538 :
1539 :
1540 : /* Primary objective is to send or verify retry.
1541 : We'll also select the scid we'll use from now on.
1542 :
1543 : Rules for selecting the SCID:
1544 : - No retry token, accepted: generate new random ID
1545 : - No retry token, retry request: generate new random ID
1546 : - Retry token, accepted: reuse SCID from retry token */
1547 6411 : if( !quic->config.retry ) {
1548 6276 : scid = fd_rng_ulong( state->_rng );
1549 6276 : } else { /* retry configured */
1550 :
1551 : /* Need to send retry? Do so before more work */
1552 135 : if( initial->token_len == 0 ) {
1553 105 : ulong new_conn_id_u64 = fd_rng_ulong( state->_rng );
1554 105 : if( FD_UNLIKELY( fd_quic_send_retry(
1555 105 : quic, pkt,
1556 105 : dcid, peer_scid, new_conn_id_u64 ) ) ) {
1557 0 : return FD_QUIC_FAILED;
1558 0 : }
1559 105 : return (initial->pkt_num_pnoff + initial->len);
1560 :
1561 105 : } else {
1562 : /* This Initial packet is in response to our Retry.
1563 : Validate the relevant fields of this post-retry INITIAL packet,
1564 : i.e. retry src conn id, ip, port
1565 : Also populate odcid and scid from the retry data */
1566 30 : int retry_ok = fd_quic_retry_server_verify( pkt, initial, &odcid, &scid, state->retry_secret, state->retry_iv, state->now, quic->config.retry_ttl );
1567 30 : if( FD_UNLIKELY( retry_ok!=FD_QUIC_SUCCESS ) ) {
1568 27 : metrics->conn_err_retry_fail_cnt++;
1569 : /* No need to set conn error, no conn object exists */
1570 27 : return FD_QUIC_PARSE_FAIL;
1571 27 : };
1572 3 : }
1573 135 : }
1574 6411 : }
1575 :
1576 : /* Determine decryption keys, related data */
1577 :
1578 : /* Placeholder for generated crypto material before allocating conn */
1579 12300 : fd_quic_crypto_keys_t _rx_keys[1];
1580 12300 : fd_quic_crypto_secrets_t _secrets[1];
1581 :
1582 : /* Conditional inputs to decryption stage */
1583 12300 : fd_quic_crypto_keys_t * rx_keys = NULL;
1584 12300 : fd_quic_crypto_secrets_t * secrets = NULL;
1585 12300 : ulong exp_pkt_num;
1586 :
1587 12300 : if( !conn ) {
1588 : /* no conn, generate secret and rx keys */
1589 6279 : rx_keys = _rx_keys;
1590 6279 : secrets = _secrets;
1591 6279 : exp_pkt_num = 0;
1592 :
1593 6279 : fd_quic_gen_initial_secrets(
1594 6279 : secrets,
1595 6279 : dcid->conn_id, dcid->sz,
1596 6279 : /* is_server */ 1 );
1597 6279 : fd_quic_gen_keys(
1598 6279 : rx_keys,
1599 6279 : secrets->secret[ fd_quic_enc_level_initial_id ][ 0 ] );
1600 6279 : } else {
1601 : /* conn, use existing keys/secrets */
1602 6021 : rx_keys = &conn->keys[ fd_quic_enc_level_initial_id ][0];
1603 6021 : secrets = &conn->secrets;
1604 6021 : exp_pkt_num = conn->exp_pkt_number[0];
1605 6021 : }
1606 :
1607 : /* Decrypt incoming packet */
1608 :
1609 : /* header protection needs the offset to the packet number */
1610 :
1611 12300 : # if !FD_QUIC_DISABLE_CRYPTO
1612 : /* this decrypts the header */
1613 12300 : if( FD_UNLIKELY(
1614 12300 : fd_quic_crypto_decrypt_hdr( cur_ptr, cur_sz,
1615 12300 : pn_offset,
1616 12300 : rx_keys ) != FD_QUIC_SUCCESS ) ) {
1617 : /* As this is an INITIAL packet, change the status to DEAD, and allow
1618 : it to be reaped */
1619 0 : FD_DEBUG( FD_LOG_DEBUG(( "fd_quic_crypto_decrypt_hdr failed" )) );
1620 0 : quic->metrics.pkt_decrypt_fail_cnt[ fd_quic_enc_level_initial_id ]++;
1621 0 : return FD_QUIC_PARSE_FAIL;
1622 0 : }
1623 12300 : # endif /* !FD_QUIC_DISABLE_CRYPTO */
1624 :
1625 12300 : ulong pkt_number_sz = fd_quic_h0_pkt_num_len( cur_ptr[0] ) + 1u;
1626 12300 : ulong pktnum_comp = fd_quic_pktnum_decode( cur_ptr+pn_offset, pkt_number_sz );
1627 :
1628 : /* reconstruct packet number */
1629 12300 : ulong pkt_number = fd_quic_reconstruct_pkt_num( pktnum_comp, pkt_number_sz, exp_pkt_num );
1630 :
1631 12300 : # if !FD_QUIC_DISABLE_CRYPTO
1632 : /* NOTE from rfc9002 s3
1633 : It is permitted for some packet numbers to never be used, leaving intentional gaps. */
1634 : /* this decrypts the header and payload */
1635 12300 : if( FD_UNLIKELY(
1636 12300 : fd_quic_crypto_decrypt( cur_ptr, tot_sz,
1637 12300 : pn_offset,
1638 12300 : pkt_number,
1639 12300 : rx_keys ) != FD_QUIC_SUCCESS ) ) {
1640 177 : FD_DEBUG( FD_LOG_DEBUG(( "fd_quic_crypto_decrypt failed" )) );
1641 177 : FD_DTRACE_PROBE_2( quic_err_decrypt_initial_pkt, pkt->ip4, pkt->pkt_number );
1642 177 : quic->metrics.pkt_decrypt_fail_cnt[ fd_quic_enc_level_initial_id ]++;
1643 177 : return FD_QUIC_PARSE_FAIL;
1644 177 : }
1645 12123 : # endif /* FD_QUIC_DISABLE_CRYPTO */
1646 :
1647 : /* set packet number on the context */
1648 12123 : pkt->pkt_number = pkt_number;
1649 :
1650 12123 : if( FD_UNLIKELY( body_sz < pkt_number_sz + FD_QUIC_CRYPTO_TAG_SZ ) ) {
1651 0 : return FD_QUIC_PARSE_FAIL;
1652 0 : }
1653 :
1654 : /* If no conn, create one. Due to previous checks, role must be server
1655 : and this must be response to Retry (if needed). */
1656 12123 : if( FD_UNLIKELY( !conn ) ) {
1657 :
1658 : /* Save peer's conn ID, which we will use to address peer with. */
1659 6102 : fd_quic_conn_id_t peer_conn_id = {0};
1660 6102 : fd_memcpy( peer_conn_id.conn_id, initial->src_conn_id, FD_QUIC_MAX_CONN_ID_SZ );
1661 6102 : peer_conn_id.sz = initial->src_conn_id_len;
1662 :
1663 : /* Prepare QUIC-TLS transport params object (sent as a TLS extension).
1664 : Take template from state and mutate certain params in-place.
1665 :
1666 : See RFC 9000 Section 18 */
1667 :
1668 : /* TODO Each transport param is a TLV tuple. This allows serializing
1669 : most transport params ahead of time. Only the conn-specific
1670 : differences will have to be appended here. */
1671 :
1672 6102 : fd_quic_transport_params_t tp[1] = { state->transport_params };
1673 :
1674 6102 : if( !quic->config.retry ) {
1675 : /* assume no retry */
1676 6099 : tp->retry_source_connection_id_present = 0;
1677 :
1678 : /* Send orig conn ID back to client (server only) */
1679 :
1680 6099 : tp->original_destination_connection_id_present = 1;
1681 6099 : tp->original_destination_connection_id_len = dcid->sz;
1682 6099 : fd_memcpy( tp->original_destination_connection_id,
1683 6099 : dcid->conn_id,
1684 6099 : dcid->sz );
1685 6099 : } else { /* retry configured */
1686 :
1687 : /* From rfc 9000:
1688 :
1689 : Figure 8 shows a similar handshake that includes a Retry packet.
1690 :
1691 : Client Server
1692 : Initial: DCID=S1, SCID=C1 ->
1693 : <- Retry: DCID=C1, SCID=S2
1694 : Initial: DCID=S2, SCID=C1 ->
1695 : <- Initial: DCID=C1, SCID=S3
1696 : ...
1697 : 1-RTT: DCID=S3 ->
1698 : <- 1-RTT: DCID=C1
1699 :
1700 : Figure 8: Use of Connection IDs in a Handshake with Retry
1701 : In both cases (Figures 7 and 8), the client sets the value of the
1702 : initial_source_connection_id transport parameter to C1.
1703 :
1704 : When the handshake does not include a Retry (Figure 7), the server
1705 : sets original_destination_connection_id to S1 (note that this value
1706 : is chosen by the client) and initial_source_connection_id to S3. In
1707 : this case, the server does not include a retry_source_connection_id
1708 : transport parameter.
1709 :
1710 : When the handshake includes a Retry (Figure 8), the server sets
1711 : original_destination_connection_id to S1, retry_source_connection_id
1712 : to S2, and initial_source_connection_id to S3. */
1713 3 : tp->original_destination_connection_id_present = 1;
1714 3 : tp->original_destination_connection_id_len = odcid.sz;
1715 3 : memcpy( tp->original_destination_connection_id,
1716 3 : odcid.conn_id,
1717 3 : odcid.sz );
1718 :
1719 : /* Client echoes back the SCID we sent via Retry. Safe to trust
1720 : because we signed the Retry Token. (Length and content validated
1721 : in fd_quic_retry_server_verify) */
1722 3 : tp->retry_source_connection_id_present = 1;
1723 3 : tp->retry_source_connection_id_len = FD_QUIC_CONN_ID_SZ;
1724 3 : FD_STORE( ulong, tp->retry_source_connection_id, scid );
1725 :
1726 3 : metrics->conn_retry_cnt++;
1727 3 : }
1728 :
1729 : /* Repeat the conn ID we picked in transport params (this is done
1730 : to authenticate conn IDs via TLS by including them in TLS-
1731 : protected data).
1732 :
1733 : Per spec, this field should be the source conn ID field we've set
1734 : on the first Initial packet we've sent. At this point, we might
1735 : not have sent an Initial packet yet -- so this field should hold
1736 : a value we are about to pick.
1737 :
1738 : fd_quic_conn_create will set conn->initial_source_conn_id to
1739 : the random new_conn_id we've created earlier. */
1740 :
1741 6102 : tp->initial_source_connection_id_present = 1;
1742 6102 : tp->initial_source_connection_id_len = FD_QUIC_CONN_ID_SZ;
1743 6102 : FD_STORE( ulong, tp->initial_source_connection_id, scid );
1744 :
1745 : /* tls hs available? After decrypting because might evict another hs */
1746 6102 : if( FD_UNLIKELY( !fd_quic_tls_hs_pool_free( state->hs_pool ) ) ) {
1747 : /* try evicting, 0 if oldest is too young so fail */
1748 0 : if( !fd_quic_tls_hs_cache_evict( quic, state )) {
1749 0 : return FD_QUIC_PARSE_FAIL;
1750 0 : }
1751 0 : }
1752 :
1753 : /* Allocate new conn */
1754 6102 : conn = fd_quic_conn_create( quic,
1755 6102 : scid,
1756 6102 : &peer_conn_id,
1757 6102 : pkt->ip4->saddr,
1758 6102 : pkt->udp->net_sport,
1759 6102 : pkt->ip4->daddr,
1760 6102 : pkt->udp->net_dport,
1761 6102 : 1 /* server */ );
1762 :
1763 6102 : if( FD_UNLIKELY( !conn ) ) { /* no free connections */
1764 : /* TODO send failure back to origin? */
1765 : /* FIXME unreachable? conn_cnt already checked above */
1766 0 : FD_DEBUG( FD_LOG_WARNING( ( "failed to allocate QUIC conn" ) ) );
1767 0 : return FD_QUIC_PARSE_FAIL;
1768 0 : }
1769 6102 : FD_DEBUG( FD_LOG_DEBUG(( "new connection allocated" )) );
1770 :
1771 : /* set the value for the caller */
1772 6102 : *p_conn = conn;
1773 :
1774 : /* Create a TLS handshake */
1775 6102 : fd_quic_tls_hs_t * tls_hs = fd_quic_tls_hs_new(
1776 6102 : fd_quic_tls_hs_pool_ele_acquire( state->hs_pool ),
1777 6102 : state->tls,
1778 6102 : (void*)conn,
1779 6102 : 1 /*is_server*/,
1780 6102 : tp,
1781 6102 : state->now );
1782 6102 : fd_quic_tls_hs_cache_ele_push_tail( &state->hs_cache, tls_hs, state->hs_pool );
1783 :
1784 6102 : conn->tls_hs = tls_hs;
1785 6102 : quic->metrics.hs_created_cnt++;
1786 :
1787 : /* copy secrets and rx keys */
1788 6102 : conn->secrets = *secrets;
1789 6102 : conn->keys[ fd_quic_enc_level_initial_id ][0] = *rx_keys;
1790 :
1791 : /* generate tx keys */
1792 6102 : fd_quic_gen_keys(
1793 6102 : &conn->keys[ fd_quic_enc_level_initial_id ][ 1 ],
1794 6102 : secrets->secret[ fd_quic_enc_level_initial_id ][ 1 ] );
1795 6102 : }
1796 :
1797 12123 : if( FD_UNLIKELY( !conn->host.ip_addr ) ) {
1798 : /* Lock src IP address in place (previously chosen by layer-4 based
1799 : on the route table) */
1800 12123 : conn->host.ip_addr = pkt->ip4->daddr;
1801 12123 : }
1802 :
1803 : /* check if reply conn id needs to change */
1804 12123 : if( FD_UNLIKELY( !( conn->server | conn->established ) ) ) {
1805 : /* switch to the source connection id for future replies */
1806 :
1807 : /* replace peer 0 connection id */
1808 6021 : conn->peer_cids[0].sz = initial->src_conn_id_len;
1809 6021 : fd_memcpy( conn->peer_cids[0].conn_id, initial->src_conn_id, FD_QUIC_MAX_CONN_ID_SZ );
1810 :
1811 : /* don't repeat this procedure */
1812 6021 : conn->established = 1;
1813 6021 : }
1814 :
1815 : /* handle frames */
1816 12123 : ulong payload_off = pn_offset + pkt_number_sz;
1817 12123 : uchar const * frame_ptr = cur_ptr + payload_off;
1818 12123 : ulong frame_sz = body_sz - pkt_number_sz - FD_QUIC_CRYPTO_TAG_SZ; /* total size of all frames in packet */
1819 36219 : while( frame_sz != 0UL ) {
1820 24177 : rc = fd_quic_handle_v1_frame( quic,
1821 24177 : conn,
1822 24177 : pkt,
1823 24177 : FD_QUIC_PKT_TYPE_INITIAL,
1824 24177 : frame_ptr,
1825 24177 : frame_sz );
1826 24177 : if( FD_UNLIKELY( rc == FD_QUIC_PARSE_FAIL ) ) {
1827 81 : FD_DEBUG( FD_LOG_DEBUG(( "Failed to handle frame (Initial, frame=0x%02x)", frame_ptr[0] )) );
1828 81 : quic->metrics.frame_rx_err_cnt++;
1829 81 : return FD_QUIC_PARSE_FAIL;
1830 81 : }
1831 :
1832 24096 : if( FD_UNLIKELY( rc==0UL || rc>frame_sz ) ) {
1833 0 : fd_quic_conn_error( conn, FD_QUIC_CONN_REASON_PROTOCOL_VIOLATION, __LINE__ );
1834 0 : return FD_QUIC_PARSE_FAIL;
1835 0 : }
1836 :
1837 : /* next frame, and remaining size */
1838 24096 : frame_ptr += rc;
1839 24096 : frame_sz -= rc;
1840 24096 : }
1841 :
1842 : /* update last activity */
1843 12042 : conn->last_activity = state->now;
1844 12042 : conn->flags &= ~( FD_QUIC_CONN_FLAGS_PING_SENT | FD_QUIC_CONN_FLAGS_PING );
1845 :
1846 : /* update expected packet number */
1847 12042 : conn->exp_pkt_number[0] = fd_ulong_max( conn->exp_pkt_number[0], pkt_number+1UL );
1848 :
1849 : /* insert into service queue */
1850 12042 : fd_quic_svc_schedule( state, conn, FD_QUIC_SVC_INSTANT );
1851 :
1852 : /* return number of bytes consumed */
1853 12042 : return tot_sz;
1854 12123 : }
1855 :
1856 : ulong
1857 : fd_quic_handle_v1_handshake(
1858 : fd_quic_t * quic,
1859 : fd_quic_conn_t * conn,
1860 : fd_quic_pkt_t * pkt,
1861 : uchar * cur_ptr,
1862 : ulong cur_sz
1863 12147 : ) {
1864 12147 : if( FD_UNLIKELY( !conn ) ) {
1865 102 : quic->metrics.pkt_no_conn_cnt++;
1866 102 : return FD_QUIC_PARSE_FAIL;
1867 102 : }
1868 :
1869 12045 : if( FD_UNLIKELY( conn->state==FD_QUIC_CONN_STATE_INVALID ||
1870 12045 : !fd_uint_extract_bit( conn->keys_avail, fd_quic_enc_level_handshake_id ) ) ) {
1871 3 : quic->metrics.pkt_no_key_cnt[ fd_quic_enc_level_handshake_id ]++;
1872 3 : return FD_QUIC_PARSE_FAIL;
1873 3 : }
1874 :
1875 : /* do parse here */
1876 12042 : fd_quic_handshake_t handshake[1];
1877 12042 : ulong rc = fd_quic_decode_handshake( handshake, cur_ptr, cur_sz );
1878 12042 : if( FD_UNLIKELY( rc == FD_QUIC_PARSE_FAIL ) ) {
1879 0 : FD_DEBUG( FD_LOG_DEBUG(( "fd_quic_decode_handshake failed" )) );
1880 0 : return FD_QUIC_PARSE_FAIL;
1881 0 : }
1882 :
1883 : /* check bounds on handshake */
1884 :
1885 : /* len indicated the number of bytes after the packet number offset
1886 : so verify this value is within the packet */
1887 12042 : ulong len = (ulong)( handshake->pkt_num_pnoff + handshake->len );
1888 12042 : if( FD_UNLIKELY( len > cur_sz ) ) {
1889 0 : FD_DEBUG( FD_LOG_DEBUG(( "Handshake packet bounds check failed" )); )
1890 0 : return FD_QUIC_PARSE_FAIL;
1891 0 : }
1892 :
1893 : /* connection ids should already be in the relevant structures */
1894 :
1895 : /* TODO prepare most of the transport parameters, and only append the
1896 : necessary differences */
1897 :
1898 : /* fetch TLS handshake */
1899 12042 : fd_quic_tls_hs_t * tls_hs = conn->tls_hs;
1900 12042 : if( FD_UNLIKELY( !tls_hs ) ) {
1901 0 : FD_DEBUG( FD_LOG_DEBUG(( "no tls handshake" )) );
1902 0 : return FD_QUIC_PARSE_FAIL;
1903 0 : }
1904 :
1905 : /* decryption */
1906 :
1907 : /* header protection needs the offset to the packet number */
1908 12042 : ulong pn_offset = handshake->pkt_num_pnoff;
1909 :
1910 12042 : ulong body_sz = handshake->len; /* not a protected field */
1911 : /* length of payload + num packet bytes */
1912 :
1913 12042 : # if !FD_QUIC_DISABLE_CRYPTO
1914 : /* this decrypts the header */
1915 12042 : if( FD_UNLIKELY(
1916 12042 : fd_quic_crypto_decrypt_hdr( cur_ptr, cur_sz,
1917 12042 : pn_offset,
1918 12042 : &conn->keys[2][0] ) != FD_QUIC_SUCCESS ) ) {
1919 0 : FD_DEBUG( FD_LOG_DEBUG(( "fd_quic_crypto_decrypt_hdr failed" )) );
1920 0 : quic->metrics.pkt_decrypt_fail_cnt[ fd_quic_enc_level_handshake_id ]++;
1921 0 : return FD_QUIC_PARSE_FAIL;
1922 0 : }
1923 12042 : # endif /* !FD_QUIC_DISABLE_CRYPTO */
1924 :
1925 : /* number of bytes in the packet header */
1926 12042 : ulong pkt_number_sz = fd_quic_h0_pkt_num_len( cur_ptr[0] ) + 1u;
1927 12042 : ulong tot_sz = pn_offset + body_sz; /* total including header and payload */
1928 :
1929 : /* now we have decrypted packet number */
1930 12042 : ulong pktnum_comp = fd_quic_pktnum_decode( cur_ptr+pn_offset, pkt_number_sz );
1931 :
1932 : /* reconstruct packet number */
1933 12042 : ulong pkt_number = fd_quic_reconstruct_pkt_num( pktnum_comp, pkt_number_sz, conn->exp_pkt_number[1] );
1934 :
1935 : /* NOTE from rfc9002 s3
1936 : It is permitted for some packet numbers to never be used, leaving intentional gaps. */
1937 :
1938 12042 : # if !FD_QUIC_DISABLE_CRYPTO
1939 : /* this decrypts the header and payload */
1940 12042 : if( FD_UNLIKELY(
1941 12042 : fd_quic_crypto_decrypt( cur_ptr, tot_sz,
1942 12042 : pn_offset,
1943 12042 : pkt_number,
1944 12042 : &conn->keys[2][0] ) != FD_QUIC_SUCCESS ) ) {
1945 : /* remove connection from map, and insert into free list */
1946 0 : FD_DEBUG( FD_LOG_DEBUG(( "fd_quic_crypto_decrypt failed" )) );
1947 0 : FD_DTRACE_PROBE_3( quic_err_decrypt_handshake_pkt, pkt->ip4, conn->our_conn_id, pkt->pkt_number );
1948 0 : quic->metrics.pkt_decrypt_fail_cnt[ fd_quic_enc_level_handshake_id ]++;
1949 0 : return FD_QUIC_PARSE_FAIL;
1950 0 : }
1951 12042 : # endif /* FD_QUIC_DISABLE_CRYPTO */
1952 :
1953 : /* set packet number on the context */
1954 12042 : pkt->pkt_number = pkt_number;
1955 :
1956 : /* check body size large enough for required elements */
1957 12042 : if( FD_UNLIKELY( body_sz < pkt_number_sz + FD_QUIC_CRYPTO_TAG_SZ ) ) {
1958 0 : return FD_QUIC_PARSE_FAIL;
1959 0 : }
1960 :
1961 : /* RFC 9000 Section 17.2.2.1. Abandoning Initial Packets
1962 : > A server stops sending and processing Initial packets when it
1963 : > receives its first Handshake packet. */
1964 12042 : fd_quic_abandon_enc_level( conn, fd_quic_enc_level_initial_id );
1965 12042 : conn->peer_enc_level = (uchar)fd_uchar_max( conn->peer_enc_level, fd_quic_enc_level_handshake_id );
1966 :
1967 : /* handle frames */
1968 12042 : ulong payload_off = pn_offset + pkt_number_sz;
1969 12042 : uchar const * frame_ptr = cur_ptr + payload_off;
1970 12042 : ulong frame_sz = body_sz - pkt_number_sz - FD_QUIC_CRYPTO_TAG_SZ; /* total size of all frames in packet */
1971 48168 : while( frame_sz != 0UL ) {
1972 36126 : rc = fd_quic_handle_v1_frame( quic,
1973 36126 : conn,
1974 36126 : pkt,
1975 36126 : FD_QUIC_PKT_TYPE_HANDSHAKE,
1976 36126 : frame_ptr,
1977 36126 : frame_sz );
1978 36126 : if( FD_UNLIKELY( rc == FD_QUIC_PARSE_FAIL ) ) {
1979 0 : FD_DEBUG( FD_LOG_DEBUG(( "Failed to handle frame (Handshake, frame=0x%02x)", frame_ptr[0] )) );
1980 0 : quic->metrics.frame_rx_err_cnt++;
1981 0 : return FD_QUIC_PARSE_FAIL;
1982 0 : }
1983 :
1984 36126 : if( FD_UNLIKELY( rc == 0UL || rc > frame_sz ) ) {
1985 0 : fd_quic_conn_error( conn, FD_QUIC_CONN_REASON_PROTOCOL_VIOLATION, __LINE__ );
1986 0 : return FD_QUIC_PARSE_FAIL;
1987 0 : }
1988 :
1989 : /* next frame and remaining size */
1990 36126 : frame_ptr += rc;
1991 36126 : frame_sz -= rc;
1992 36126 : }
1993 :
1994 : /* update last activity */
1995 12042 : conn->last_activity = fd_quic_get_state( quic )->now;
1996 12042 : conn->flags &= ~( FD_QUIC_CONN_FLAGS_PING_SENT | FD_QUIC_CONN_FLAGS_PING );
1997 :
1998 : /* update expected packet number */
1999 12042 : conn->exp_pkt_number[1] = fd_ulong_max( conn->exp_pkt_number[1], pkt_number+1UL );
2000 :
2001 : /* return number of bytes consumed */
2002 12042 : return tot_sz;
2003 12042 : }
2004 :
2005 : ulong
2006 : fd_quic_handle_v1_retry(
2007 : fd_quic_t * quic,
2008 : fd_quic_conn_t * conn,
2009 : fd_quic_pkt_t const * pkt,
2010 : uchar const * cur_ptr,
2011 : ulong cur_sz
2012 147 : ) {
2013 147 : (void)pkt;
2014 :
2015 147 : if( FD_UNLIKELY( quic->config.role == FD_QUIC_ROLE_SERVER ) ) {
2016 36 : if( FD_UNLIKELY( conn ) ) { /* likely a misbehaving client w/o a conn */
2017 0 : fd_quic_conn_error( conn, FD_QUIC_CONN_REASON_PROTOCOL_VIOLATION, __LINE__ );
2018 0 : }
2019 36 : return FD_QUIC_PARSE_FAIL;
2020 36 : }
2021 :
2022 111 : if( FD_UNLIKELY( !conn ) ) {
2023 108 : quic->metrics.pkt_no_conn_cnt++;
2024 108 : return FD_QUIC_PARSE_FAIL;
2025 108 : }
2026 :
2027 3 : fd_quic_conn_id_t const * orig_dst_conn_id = &conn->peer_cids[0];
2028 3 : uchar const * retry_token = NULL;
2029 3 : ulong retry_token_sz = 0UL;
2030 :
2031 3 : int rc = fd_quic_retry_client_verify(
2032 3 : cur_ptr, cur_sz,
2033 3 : orig_dst_conn_id,
2034 3 : &conn->retry_src_conn_id,
2035 3 : &retry_token, &retry_token_sz
2036 3 : );
2037 3 : if( FD_UNLIKELY( rc!=FD_QUIC_SUCCESS ) ) {
2038 0 : quic->metrics.conn_err_retry_fail_cnt++;
2039 0 : return FD_QUIC_PARSE_FAIL;
2040 0 : }
2041 :
2042 : /* Update the peer using the retry src conn id */
2043 3 : conn->peer_cids[0] = conn->retry_src_conn_id;
2044 :
2045 : /* Re-send the ClientHello */
2046 3 : conn->hs_sent_bytes[fd_quic_enc_level_initial_id] = 0;
2047 :
2048 : /* Need to regenerate keys using the retry source connection id */
2049 3 : fd_quic_gen_initial_secret_and_keys( conn, &conn->retry_src_conn_id, /* is_server */ 0 );
2050 :
2051 : /* The token length is the remaining bytes in the retry packet after subtracting known fields. */
2052 3 : conn->token_len = retry_token_sz;
2053 3 : fd_memcpy( &conn->token, retry_token, conn->token_len );
2054 :
2055 : /* have to rewind the handshake data */
2056 3 : uint enc_level = fd_quic_enc_level_initial_id;
2057 3 : conn->hs_sent_bytes[enc_level] = 0;
2058 :
2059 : /* send the INITIAL */
2060 3 : conn->upd_pkt_number = FD_QUIC_PKT_NUM_PENDING;
2061 :
2062 3 : fd_quic_svc_schedule1( conn, FD_QUIC_SVC_INSTANT );
2063 :
2064 3 : return cur_sz;
2065 3 : }
2066 :
2067 : ulong
2068 78 : fd_quic_handle_v1_zero_rtt( fd_quic_t * quic, fd_quic_conn_t * conn, fd_quic_pkt_t const * pkt, uchar const * cur_ptr, ulong cur_sz ) {
2069 78 : (void)pkt;
2070 78 : (void)quic;
2071 78 : (void)cur_ptr;
2072 78 : (void)cur_sz;
2073 : /* since we do not support zero-rtt, simply fail the packet */
2074 78 : if( conn ) {
2075 0 : fd_quic_conn_error( conn, FD_QUIC_CONN_REASON_INTERNAL_ERROR, __LINE__ );
2076 0 : }
2077 78 : return FD_QUIC_PARSE_FAIL;
2078 78 : }
2079 :
2080 : int
2081 : fd_quic_lazy_ack_pkt( fd_quic_t * quic,
2082 : fd_quic_conn_t * conn,
2083 92334438 : fd_quic_pkt_t const * pkt ) {
2084 92334438 : if( pkt->ack_flag & ACK_FLAG_CANCEL ) {
2085 0 : return FD_QUIC_ACK_TX_CANCEL;
2086 0 : }
2087 :
2088 92334438 : fd_quic_state_t * state = fd_quic_get_state( quic );
2089 92334438 : int res = fd_quic_ack_pkt( conn->ack_gen, pkt->pkt_number, pkt->enc_level, state->now );
2090 92334438 : conn->ack_gen->is_elicited |= fd_uchar_if( pkt->ack_flag & ACK_FLAG_RQD, 1, 0 );
2091 :
2092 : /* Trigger immediate ACK send? */
2093 92334438 : int ack_sz_threshold_hit = conn->unacked_sz > quic->config.ack_threshold;
2094 92334438 : int force_instant_ack =
2095 92334438 : ( !!(pkt->ack_flag & ACK_FLAG_RQD) ) &
2096 92334438 : ( ( pkt->enc_level == fd_quic_enc_level_initial_id ) |
2097 92334438 : ( pkt->enc_level == fd_quic_enc_level_handshake_id ) );
2098 92334438 : uint svc_type;
2099 92334438 : if( ack_sz_threshold_hit | force_instant_ack ) {
2100 256239 : conn->unacked_sz = 0UL;
2101 256239 : svc_type = FD_QUIC_SVC_INSTANT;
2102 92078199 : } else {
2103 92078199 : svc_type = FD_QUIC_SVC_ACK_TX;
2104 92078199 : }
2105 92334438 : fd_quic_svc_schedule( state, conn, svc_type );
2106 :
2107 92334438 : return res;
2108 92334438 : }
2109 :
2110 : /* This thunk works around a compiler bug (bogus stringop-overflow warning) in GCC 11 */
2111 : __attribute__((noinline)) static void
2112 96 : fd_quic_key_update_derive1( fd_quic_conn_t * conn ) {
2113 96 : fd_quic_key_update_derive( &conn->secrets, conn->new_keys );
2114 96 : }
2115 :
2116 : static void
2117 96 : fd_quic_key_update_complete( fd_quic_conn_t * conn ) {
2118 : /* Key updates are only possible for 1-RTT packets, which are appdata */
2119 96 : ulong const enc_level = fd_quic_enc_level_appdata_id;
2120 :
2121 : /* Update payload keys */
2122 96 : memcpy( conn->keys[enc_level][0].pkt_key, conn->new_keys[0].pkt_key, FD_AES_128_KEY_SZ );
2123 96 : memcpy( conn->keys[enc_level][0].iv, conn->new_keys[0].iv, FD_AES_GCM_IV_SZ );
2124 96 : memcpy( conn->keys[enc_level][1].pkt_key, conn->new_keys[1].pkt_key, FD_AES_128_KEY_SZ );
2125 96 : memcpy( conn->keys[enc_level][1].iv, conn->new_keys[1].iv, FD_AES_GCM_IV_SZ );
2126 :
2127 : /* Update IVs */
2128 96 : memcpy( conn->secrets.secret[enc_level][0], conn->secrets.new_secret[0], FD_QUIC_SECRET_SZ );
2129 96 : memcpy( conn->secrets.secret[enc_level][1], conn->secrets.new_secret[1], FD_QUIC_SECRET_SZ );
2130 :
2131 : /* Packet header encryption keys are not updated */
2132 :
2133 : /* Wind up for next key phase update */
2134 96 : conn->key_phase = !conn->key_phase;
2135 96 : conn->key_update = 0;
2136 96 : fd_quic_key_update_derive1( conn );
2137 :
2138 96 : FD_DEBUG( FD_LOG_DEBUG(( "key update completed" )); )
2139 96 : }
2140 :
2141 : ulong
2142 : fd_quic_handle_v1_one_rtt( fd_quic_t * quic,
2143 : fd_quic_conn_t * conn,
2144 : fd_quic_pkt_t * pkt,
2145 : uchar * const cur_ptr,
2146 13558570 : ulong const tot_sz ) {
2147 13558570 : if( !conn ) {
2148 6882 : quic->metrics.pkt_no_conn_cnt++;
2149 6882 : return FD_QUIC_PARSE_FAIL;
2150 6882 : }
2151 13551688 : if( FD_UNLIKELY( conn->state==FD_QUIC_CONN_STATE_INVALID ||
2152 13551688 : !fd_uint_extract_bit( conn->keys_avail, fd_quic_enc_level_appdata_id ) ) ) {
2153 6012 : quic->metrics.pkt_no_key_cnt[ fd_quic_enc_level_appdata_id ]++;
2154 6012 : return FD_QUIC_PARSE_FAIL;
2155 6012 : }
2156 :
2157 13545676 : if( FD_UNLIKELY( tot_sz < (1+FD_QUIC_CONN_ID_SZ+1) ) ) {
2158 : /* One-RTT header: 1 byte
2159 : DCID: FD_QUIC_CONN_ID_SZ
2160 : Pkt number: 1-4 bytes */
2161 0 : quic->metrics.pkt_decrypt_fail_cnt[ fd_quic_enc_level_appdata_id ]++;
2162 0 : return FD_QUIC_PARSE_FAIL;
2163 0 : }
2164 13545676 : ulong pn_offset = 1UL + FD_QUIC_CONN_ID_SZ;
2165 :
2166 13545676 : pkt->enc_level = fd_quic_enc_level_appdata_id;
2167 :
2168 13545676 : # if !FD_QUIC_DISABLE_CRYPTO
2169 13545676 : if( FD_UNLIKELY(
2170 13545676 : fd_quic_crypto_decrypt_hdr( cur_ptr, tot_sz,
2171 13545676 : pn_offset,
2172 13545676 : &conn->keys[3][0] ) != FD_QUIC_SUCCESS ) ) {
2173 0 : FD_DEBUG( FD_LOG_DEBUG(( "fd_quic_crypto_decrypt_hdr failed" )) );
2174 0 : quic->metrics.pkt_decrypt_fail_cnt[ fd_quic_enc_level_appdata_id ]++;
2175 0 : return FD_QUIC_PARSE_FAIL;
2176 0 : }
2177 13545676 : # endif /* !FD_QUIC_DISABLE_CRYPTO */
2178 :
2179 13545676 : uint pkt_number_sz = fd_quic_h0_pkt_num_len( cur_ptr[0] ) + 1u;
2180 13545676 : uint key_phase = fd_quic_one_rtt_key_phase( cur_ptr[0] );
2181 :
2182 : /* reconstruct packet number */
2183 13545676 : ulong pktnum_comp = fd_quic_pktnum_decode( cur_ptr+pn_offset, pkt_number_sz );
2184 13545676 : ulong pkt_number = fd_quic_reconstruct_pkt_num( pktnum_comp, pkt_number_sz, conn->exp_pkt_number[2] );
2185 :
2186 : /* NOTE from rfc9002 s3
2187 : It is permitted for some packet numbers to never be used, leaving intentional gaps. */
2188 :
2189 : /* is current packet in the current key phase? */
2190 13545676 : int current_key_phase = conn->key_phase == key_phase;
2191 :
2192 13545676 : # if !FD_QUIC_DISABLE_CRYPTO
2193 : /* If the key phase bit flips, decrypt with the new pair of keys
2194 : instead. Note that the key phase bit is untrusted at this point. */
2195 13545676 : fd_quic_crypto_keys_t * keys = current_key_phase ? &conn->keys[3][0] : &conn->new_keys[0];
2196 :
2197 : /* this decrypts the header and payload */
2198 13545676 : if( FD_UNLIKELY(
2199 13545676 : fd_quic_crypto_decrypt( cur_ptr, tot_sz,
2200 13545676 : pn_offset,
2201 13545676 : pkt_number,
2202 13545676 : keys ) != FD_QUIC_SUCCESS ) ) {
2203 : /* remove connection from map, and insert into free list */
2204 0 : FD_DTRACE_PROBE_3( quic_err_decrypt_1rtt_pkt, pkt->ip4, conn->our_conn_id, pkt->pkt_number );
2205 0 : quic->metrics.pkt_decrypt_fail_cnt[ fd_quic_enc_level_appdata_id ]++;
2206 0 : return FD_QUIC_PARSE_FAIL;
2207 0 : }
2208 13545676 : # endif /* !FD_QUIC_DISABLE_CRYPTO */
2209 :
2210 : /* set packet number on the context */
2211 13545676 : pkt->pkt_number = pkt_number;
2212 :
2213 13545676 : if( !current_key_phase ) {
2214 : /* Decryption succeeded. Commit the key phase update and throw
2215 : away the old keys. (May cause a few decryption failures if old
2216 : packets get reordered past the current incoming packet) */
2217 96 : fd_quic_key_update_complete( conn );
2218 96 : }
2219 :
2220 13545676 : conn->peer_enc_level = (uchar)fd_uchar_max( conn->peer_enc_level, fd_quic_enc_level_appdata_id );
2221 :
2222 : /* handle frames */
2223 13545676 : ulong payload_off = pn_offset + pkt_number_sz;
2224 13545676 : uchar const * frame_ptr = cur_ptr + payload_off;
2225 13545676 : ulong payload_sz = tot_sz - pn_offset - pkt_number_sz; /* includes auth tag */
2226 13545676 : if( FD_UNLIKELY( payload_sz<FD_QUIC_CRYPTO_TAG_SZ ) ) return FD_QUIC_PARSE_FAIL;
2227 13545676 : ulong frame_sz = payload_sz - FD_QUIC_CRYPTO_TAG_SZ; /* total size of all frames in packet */
2228 27091358 : while( frame_sz != 0UL ) {
2229 13545682 : ulong rc = fd_quic_handle_v1_frame(
2230 13545682 : quic, conn, pkt, FD_QUIC_PKT_TYPE_ONE_RTT,
2231 13545682 : frame_ptr, frame_sz );
2232 13545682 : if( FD_UNLIKELY( rc == FD_QUIC_PARSE_FAIL ) ) {
2233 0 : FD_DEBUG( FD_LOG_DEBUG(( "Failed to handle frame (1-RTT, frame=0x%02x)", frame_ptr[0] )) );
2234 0 : quic->metrics.frame_rx_err_cnt++;
2235 0 : return FD_QUIC_PARSE_FAIL;
2236 0 : }
2237 :
2238 13545682 : if( FD_UNLIKELY( rc == 0UL || rc > frame_sz ) ) {
2239 0 : FD_LOG_WARNING(( "fd_quic_handle_v1_frame returned invalid size" ));
2240 0 : fd_quic_conn_error( conn, FD_QUIC_CONN_REASON_PROTOCOL_VIOLATION, __LINE__ );
2241 0 : return FD_QUIC_PARSE_FAIL;
2242 0 : }
2243 :
2244 : /* next frame, and remaining size */
2245 13545682 : frame_ptr += rc;
2246 13545682 : frame_sz -= rc;
2247 13545682 : }
2248 :
2249 : /* update last activity */
2250 13545676 : conn->last_activity = fd_quic_get_state( quic )->now;
2251 :
2252 : /* update expected packet number */
2253 13545676 : conn->exp_pkt_number[2] = fd_ulong_max( conn->exp_pkt_number[2], pkt_number+1UL );
2254 :
2255 13545676 : return tot_sz;
2256 13545676 : }
2257 :
2258 :
2259 : /* process v1 quic packets
2260 : returns number of bytes consumed, or FD_QUIC_PARSE_FAIL upon error */
2261 : ulong
2262 : fd_quic_process_quic_packet_v1( fd_quic_t * quic,
2263 : fd_quic_pkt_t * pkt,
2264 : uchar * cur_ptr,
2265 13587499 : ulong cur_sz ) {
2266 :
2267 : /* bounds check packet size */
2268 13587499 : if( FD_UNLIKELY( cur_sz < FD_QUIC_SHORTEST_PKT ) ) {
2269 0 : quic->metrics.pkt_undersz_cnt++;
2270 0 : return FD_QUIC_PARSE_FAIL;
2271 0 : }
2272 13587499 : if( FD_UNLIKELY( cur_sz > 1500 ) ) {
2273 681 : quic->metrics.pkt_oversz_cnt++;
2274 681 : return FD_QUIC_PARSE_FAIL;
2275 681 : }
2276 :
2277 13586818 : fd_quic_state_t * state = fd_quic_get_state( quic );
2278 13586818 : fd_quic_conn_t * conn = NULL;
2279 :
2280 :
2281 : /* keep end */
2282 13586818 : uchar * orig_ptr = cur_ptr;
2283 :
2284 : /* No need for cur_sz check, since we are safe from the above check.
2285 : Decrementing cur_sz is done in the long header branch, the short header
2286 : branch parses the first byte again using the parser generator.
2287 : */
2288 13586818 : uchar hdr_form = fd_quic_h0_hdr_form( *cur_ptr );
2289 13586818 : ulong rc;
2290 :
2291 13586818 : if( hdr_form ) { /* long header */
2292 28251 : fd_quic_long_hdr_t long_hdr[1];
2293 28251 : rc = fd_quic_decode_long_hdr( long_hdr, cur_ptr+1, cur_sz-1 );
2294 28251 : if( FD_UNLIKELY( rc == FD_QUIC_PARSE_FAIL ) ) {
2295 360 : FD_DEBUG( FD_LOG_DEBUG(( "fd_quic_decode_long_hdr failed" )); )
2296 360 : quic->metrics.pkt_quic_hdr_err_cnt++;
2297 360 : return FD_QUIC_PARSE_FAIL;
2298 360 : }
2299 :
2300 27891 : fd_quic_conn_id_t dcid = fd_quic_conn_id_new( long_hdr->dst_conn_id, long_hdr->dst_conn_id_len );
2301 27891 : if( dcid.sz == FD_QUIC_CONN_ID_SZ ) {
2302 27030 : conn = fd_quic_conn_query( state->conn_map, fd_ulong_load_8( dcid.conn_id ) );
2303 27030 : }
2304 27891 : fd_quic_conn_id_t scid = fd_quic_conn_id_new( long_hdr->src_conn_id, long_hdr->src_conn_id_len );
2305 :
2306 27891 : uchar long_packet_type = fd_quic_h0_long_packet_type( *cur_ptr );
2307 :
2308 : /* encryption level matches that of TLS */
2309 27891 : pkt->enc_level = long_packet_type; /* V2 uses an indirect mapping */
2310 :
2311 : /* initialize packet number to unused value */
2312 27891 : pkt->pkt_number = FD_QUIC_PKT_NUM_UNUSED;
2313 :
2314 27891 : switch( long_packet_type ) {
2315 15522 : case FD_QUIC_PKT_TYPE_INITIAL:
2316 15522 : rc = fd_quic_handle_v1_initial( quic, &conn, pkt, &dcid, &scid, cur_ptr, cur_sz );
2317 15522 : if( FD_UNLIKELY( !conn ) ) {
2318 : /* FIXME not really a fail - Could be a retry */
2319 3399 : return FD_QUIC_PARSE_FAIL;
2320 3399 : }
2321 12123 : break;
2322 12144 : case FD_QUIC_PKT_TYPE_HANDSHAKE:
2323 12144 : rc = fd_quic_handle_v1_handshake( quic, conn, pkt, cur_ptr, cur_sz );
2324 12144 : break;
2325 147 : case FD_QUIC_PKT_TYPE_RETRY:
2326 147 : rc = fd_quic_handle_v1_retry( quic, conn, pkt, cur_ptr, cur_sz );
2327 147 : break;
2328 78 : case FD_QUIC_PKT_TYPE_ZERO_RTT:
2329 78 : rc = fd_quic_handle_v1_zero_rtt( quic, conn, pkt, cur_ptr, cur_sz );
2330 78 : break;
2331 27891 : }
2332 :
2333 24492 : if( FD_UNLIKELY( rc == FD_QUIC_PARSE_FAIL ) ) {
2334 405 : FD_DEBUG( FD_LOG_DEBUG(( "Rejected packet (type=%d)", long_packet_type )); )
2335 405 : return FD_QUIC_PARSE_FAIL;
2336 405 : }
2337 :
2338 13558567 : } else { /* short header */
2339 : /* encryption level of short header packets is fd_quic_enc_level_appdata_id */
2340 13558567 : pkt->enc_level = fd_quic_enc_level_appdata_id;
2341 :
2342 : /* initialize packet number to unused value */
2343 13558567 : pkt->pkt_number = FD_QUIC_PKT_NUM_UNUSED;
2344 :
2345 : /* find connection id */
2346 13558567 : ulong dst_conn_id = fd_ulong_load_8( cur_ptr+1 );
2347 13558567 : conn = fd_quic_conn_query( state->conn_map, dst_conn_id );
2348 13558567 : rc = fd_quic_handle_v1_one_rtt( quic, conn, pkt, cur_ptr, cur_sz );
2349 13558567 : if( FD_UNLIKELY( rc == FD_QUIC_PARSE_FAIL ) ) {
2350 12891 : return FD_QUIC_PARSE_FAIL;
2351 12891 : }
2352 13558567 : }
2353 :
2354 13569763 : if( FD_UNLIKELY( rc == 0UL ) ) {
2355 : /* this is an error because it causes infinite looping */
2356 0 : return FD_QUIC_PARSE_FAIL;
2357 0 : }
2358 13569763 : cur_ptr += rc;
2359 :
2360 : /* if we get here we parsed all the frames, so ack the packet */
2361 13569763 : int ack_type = fd_quic_lazy_ack_pkt( quic, conn, pkt );
2362 13569763 : quic->metrics.ack_tx[ ack_type ]++;
2363 :
2364 13569763 : if( pkt->rtt_ack_time ) {
2365 243795 : fd_quic_sample_rtt( conn, (long)pkt->rtt_ack_time, (long)pkt->rtt_ack_delay );
2366 243795 : }
2367 :
2368 : /* return bytes consumed */
2369 13569763 : return (ulong)( cur_ptr - orig_ptr );
2370 13569763 : }
2371 :
2372 :
2373 : /* version negotiation packet has version 0 */
2374 : static inline int
2375 23556 : is_version_invalid( fd_quic_t * quic, uint version ) {
2376 23556 : if( version == 0 ) {
2377 : /* TODO implement version negotiation */
2378 423 : quic->metrics.pkt_verneg_cnt++;
2379 423 : FD_DEBUG( FD_LOG_DEBUG(( "Got version negotiation packet" )) );
2380 423 : return 1;
2381 423 : }
2382 :
2383 : /* 0x?a?a?a?au is intended to force version negotiation
2384 : TODO implement */
2385 23133 : if( ( version & 0x0a0a0a0au ) == 0x0a0a0a0au ) {
2386 : /* at present, ignore */
2387 3 : quic->metrics.pkt_verneg_cnt++;
2388 3 : FD_DEBUG( FD_LOG_DEBUG(( "Got version negotiation packet (forced)" )) );
2389 3 : return 1;
2390 3 : }
2391 :
2392 23130 : if( version != 1 ) {
2393 : /* cannot interpret length, so discard entire packet */
2394 : /* TODO send version negotiation */
2395 219 : quic->metrics.pkt_verneg_cnt++;
2396 219 : FD_DEBUG( FD_LOG_DEBUG(( "Got unknown version QUIC packet" )) );
2397 219 : return 1;
2398 219 : }
2399 22911 : return 0;
2400 23130 : }
2401 :
2402 : void
2403 : fd_quic_process_packet( fd_quic_t * quic,
2404 : uchar * data,
2405 13588552 : ulong data_sz ) {
2406 :
2407 13588552 : fd_quic_state_t * state = fd_quic_get_state( quic );
2408 13588552 : state->now = fd_quic_now( quic );
2409 :
2410 13588552 : ulong rc = 0;
2411 :
2412 : /* holds the remainder of the packet*/
2413 13588552 : uchar * cur_ptr = data;
2414 13588552 : ulong cur_sz = data_sz;
2415 :
2416 13588552 : if( FD_UNLIKELY( data_sz > 0xffffu ) ) {
2417 0 : FD_DTRACE_PROBE( quic_err_rx_oversz );
2418 0 : quic->metrics.pkt_oversz_cnt++;
2419 0 : return;
2420 0 : }
2421 :
2422 13588552 : fd_quic_pkt_t pkt = { .datagram_sz = (uint)data_sz };
2423 :
2424 13588552 : pkt.rcv_time = state->now;
2425 13588552 : pkt.rtt_pkt_number = 0;
2426 13588552 : pkt.rtt_ack_time = 0;
2427 :
2428 : /* parse ip, udp */
2429 :
2430 13588552 : rc = fd_quic_decode_ip4( pkt.ip4, cur_ptr, cur_sz );
2431 13588552 : if( FD_UNLIKELY( rc == FD_QUIC_PARSE_FAIL ) ) {
2432 : /* TODO count failure */
2433 0 : FD_DTRACE_PROBE( quic_err_rx_net_hdr );
2434 0 : quic->metrics.pkt_net_hdr_err_cnt++;
2435 0 : FD_DEBUG( FD_LOG_DEBUG(( "fd_quic_decode_ip4 failed" )) );
2436 0 : return;
2437 0 : }
2438 :
2439 : /* check version, tot_len, protocol, checksum? */
2440 13588552 : if( FD_UNLIKELY( pkt.ip4->protocol != FD_IP4_HDR_PROTOCOL_UDP ) ) {
2441 0 : FD_DTRACE_PROBE( quic_err_rx_net_hdr );
2442 0 : quic->metrics.pkt_net_hdr_err_cnt++;
2443 0 : FD_DEBUG( FD_LOG_DEBUG(( "Packet is not UDP" )) );
2444 0 : return;
2445 0 : }
2446 :
2447 : /* verify ip4 packet isn't truncated
2448 : * AF_XDP can silently do this */
2449 13588552 : if( FD_UNLIKELY( pkt.ip4->net_tot_len > cur_sz ) ) {
2450 0 : FD_DTRACE_PROBE( quic_err_rx_net_hdr );
2451 0 : quic->metrics.pkt_net_hdr_err_cnt++;
2452 0 : FD_DEBUG( FD_LOG_DEBUG(( "IPv4 header indicates truncation" )) );
2453 0 : return;
2454 0 : }
2455 :
2456 : /* update pointer + size */
2457 13588552 : cur_ptr += rc;
2458 13588552 : cur_sz -= rc;
2459 :
2460 13588552 : rc = fd_quic_decode_udp( pkt.udp, cur_ptr, cur_sz );
2461 13588552 : if( FD_UNLIKELY( rc == FD_QUIC_PARSE_FAIL ) ) {
2462 : /* TODO count failure */
2463 0 : FD_DTRACE_PROBE( quic_err_rx_net_hdr );
2464 0 : quic->metrics.pkt_net_hdr_err_cnt++;
2465 0 : FD_DEBUG( FD_LOG_DEBUG(( "fd_quic_decode_udp failed" )) );
2466 0 : return;
2467 0 : }
2468 :
2469 : /* sanity check udp length */
2470 13588552 : if( FD_UNLIKELY( pkt.udp->net_len < sizeof(fd_udp_hdr_t) ||
2471 13588552 : pkt.udp->net_len > cur_sz ) ) {
2472 0 : FD_DTRACE_PROBE( quic_err_rx_net_hdr );
2473 0 : quic->metrics.pkt_net_hdr_err_cnt++;
2474 0 : FD_DEBUG( FD_LOG_DEBUG(( "UDP header indicates truncation" )) );
2475 0 : return;
2476 0 : }
2477 :
2478 : /* update pointer + size */
2479 13588552 : cur_ptr += rc;
2480 13588552 : cur_sz = pkt.udp->net_len - rc; /* replace with udp length */
2481 :
2482 : /* cur_ptr[0..cur_sz-1] should be payload */
2483 :
2484 : /* filter */
2485 : /* check dst eth address, ip address? probably not necessary */
2486 : /* usually look up port here, but let's jump straight into decoding as-if
2487 : quic */
2488 :
2489 : /* update counters */
2490 :
2491 : /* shortest valid quic payload? */
2492 13588552 : if( FD_UNLIKELY( cur_sz < FD_QUIC_SHORTEST_PKT ) ) {
2493 6639 : FD_DTRACE_PROBE( quic_err_rx_net_hdr );
2494 6639 : quic->metrics.pkt_net_hdr_err_cnt++;
2495 6639 : FD_DEBUG( FD_LOG_DEBUG(( "Undersize QUIC packet" )) );
2496 6639 : return;
2497 6639 : }
2498 :
2499 : /* short packets don't have version */
2500 13581913 : int long_pkt = !!( (uint)cur_ptr[0] & 0x80u );
2501 :
2502 :
2503 13581913 : if( long_pkt ) {
2504 : /* version at offset 1..4 */
2505 23556 : uint version = fd_uint_bswap( FD_LOAD( uint, cur_ptr + 1 ) );
2506 : /* we only support version 1 */
2507 23556 : if( FD_UNLIKELY( is_version_invalid( quic, version ) ) ) {
2508 645 : return;
2509 645 : }
2510 :
2511 : /* multiple QUIC packets in a UDP packet */
2512 : /* shortest valid quic payload? */
2513 22911 : ulong pkt_idx;
2514 46998 : for( pkt_idx=0UL; pkt_idx<FD_QUIC_PKT_COALESCE_LIMIT; pkt_idx++ ) {
2515 : /* Are we done? Omit short packet handling that follows */
2516 46998 : if( FD_UNLIKELY( cur_sz < FD_QUIC_SHORTEST_PKT ) ) return;
2517 :
2518 : /* short packet requires different handling */
2519 28932 : int short_pkt = !( (uint)cur_ptr[0] & 0x80u );
2520 :
2521 28932 : if( FD_UNLIKELY( short_pkt ) ) break;
2522 :
2523 : /* check version */
2524 28932 : uint cur_version = fd_uint_bswap( FD_LOAD( uint, cur_ptr + 1 ) );
2525 :
2526 28932 : if( cur_version != version ) {
2527 : /* multiple versions in a single connection is a violation, and by
2528 : extension so is multiple versions in a single udp datagram
2529 : these are silently ignored
2530 :
2531 : for reference
2532 : all quic packets in a udp datagram must be for the same connection id
2533 : (section 12.2) and therefore the same connection
2534 : all packets on a connection must be of the same version (5.2) */
2535 0 : quic->metrics.pkt_quic_hdr_err_cnt++;
2536 0 : FD_DEBUG( FD_LOG_DEBUG(( "Mixed QUIC versions in packet" )) );
2537 0 : return;
2538 0 : }
2539 :
2540 28932 : rc = fd_quic_process_quic_packet_v1( quic, &pkt, cur_ptr, cur_sz );
2541 :
2542 : /* 0UL means no progress, so fail */
2543 28932 : if( FD_UNLIKELY( ( rc == FD_QUIC_PARSE_FAIL ) |
2544 28932 : ( rc == 0UL ) ) ) {
2545 4845 : FD_DEBUG( FD_LOG_DEBUG(( "fd_quic_process_quic_packet_v1 failed (stuck=%d)", rc==0UL )) );
2546 4845 : return;
2547 4845 : }
2548 :
2549 24087 : if( FD_UNLIKELY( rc > cur_sz ) ) {
2550 0 : FD_DEBUG( FD_LOG_WARNING(( "fd_quic_process_quic_packet_v1 read too much" )) );
2551 0 : return;
2552 0 : }
2553 :
2554 : /* return code (rc) is the number of bytes consumed */
2555 24087 : cur_sz -= rc;
2556 24087 : cur_ptr += rc;
2557 24087 : }
2558 0 : if( pkt_idx==FD_QUIC_PKT_COALESCE_LIMIT ) {
2559 : /* too many packets in a single udp datagram */
2560 0 : return;
2561 0 : }
2562 0 : }
2563 :
2564 : /* above can drop out of loop if a short packet is detected */
2565 13558357 : if( FD_UNLIKELY( cur_sz < FD_QUIC_SHORTEST_PKT ) ) return;
2566 :
2567 : /* short header packet
2568 : only one_rtt packets currently have short headers */
2569 13558357 : fd_quic_process_quic_packet_v1( quic, &pkt, cur_ptr, cur_sz );
2570 13558357 : }
2571 :
2572 : /* main receive-side entry point */
2573 : int
2574 : fd_quic_aio_cb_receive( void * context,
2575 : fd_aio_pkt_info_t const * batch,
2576 : ulong batch_cnt,
2577 : ulong * opt_batch_idx,
2578 13569541 : int flush ) {
2579 13569541 : (void)flush;
2580 :
2581 13569541 : fd_quic_t * quic = context;
2582 :
2583 : /* need tickcount for metrics */
2584 13569541 : long now_ticks = fd_tickcount();
2585 :
2586 13569541 : FD_DEBUG(
2587 13569541 : fd_quic_state_t * state = fd_quic_get_state( quic );
2588 13569541 : static ulong t0 = 0;
2589 13569541 : static ulong t1 = 0;
2590 13569541 : t0 = state->now;
2591 13569541 : )
2592 :
2593 : /* this aio interface is configured as one-packet per buffer
2594 : so batch[0] refers to one buffer
2595 : as such, we simply forward each individual packet to a handling function */
2596 27139082 : for( ulong j = 0; j < batch_cnt; ++j ) {
2597 13569541 : fd_quic_process_packet( quic, batch[ j ].buf, batch[ j ].buf_sz );
2598 13569541 : quic->metrics.net_rx_byte_cnt += batch[ j ].buf_sz;
2599 13569541 : }
2600 :
2601 : /* the assumption here at present is that any packet that could not be processed
2602 : is simply dropped
2603 : hence, all packets were consumed */
2604 13569541 : if( FD_LIKELY( opt_batch_idx ) ) {
2605 0 : *opt_batch_idx = batch_cnt;
2606 0 : }
2607 :
2608 13569541 : quic->metrics.net_rx_pkt_cnt += batch_cnt;
2609 :
2610 13569541 : FD_DEBUG(
2611 13569541 : t1 = fd_quic_now( quic );
2612 13569541 : ulong delta = t1 - t0;
2613 13569541 : if( delta > (ulong)500e3 ) {
2614 13569541 : FD_LOG_WARNING(( "CALLBACK - took %lu t0: %lu t1: %lu batch_cnt: %lu", delta, t0, t1, (ulong)batch_cnt ));
2615 13569541 : }
2616 13569541 : )
2617 :
2618 13569541 : long delta_ticks = fd_tickcount() - now_ticks;
2619 :
2620 13569541 : fd_histf_sample( quic->metrics.receive_duration, (ulong)delta_ticks );
2621 :
2622 13569541 : return FD_AIO_SUCCESS;
2623 13569541 : }
2624 :
2625 : void
2626 : fd_quic_tls_cb_alert( fd_quic_tls_hs_t * hs,
2627 : void * context,
2628 0 : int alert ) {
2629 0 : (void)hs;
2630 0 : fd_quic_conn_t * conn = (fd_quic_conn_t *)context;
2631 0 : (void)conn;
2632 0 : (void)alert;
2633 0 : FD_DEBUG( FD_LOG_DEBUG(( "TLS callback: %s", conn->server ? "SERVER" : "CLIENT" ));
2634 0 : FD_LOG_DEBUG(( "TLS alert: (%d-%s)", alert, fd_tls_alert_cstr( (uint)alert ) )); );
2635 :
2636 : /* TODO store alert to reply to peer */
2637 0 : }
2638 :
2639 : void
2640 : fd_quic_tls_cb_secret( fd_quic_tls_hs_t * hs,
2641 : void * context,
2642 24084 : fd_quic_tls_secret_t const * secret ) {
2643 :
2644 24084 : fd_quic_conn_t * conn = (fd_quic_conn_t*)context;
2645 24084 : fd_quic_t * quic = conn->quic;
2646 :
2647 : /* look up suite */
2648 : /* set secrets */
2649 24084 : FD_TEST( secret->enc_level < FD_QUIC_NUM_ENC_LEVELS );
2650 :
2651 24084 : uint enc_level = secret->enc_level;
2652 :
2653 24084 : fd_quic_crypto_secrets_t * crypto_secret = &conn->secrets;
2654 :
2655 24084 : memcpy( crypto_secret->secret[enc_level][0], secret->read_secret, FD_QUIC_SECRET_SZ );
2656 24084 : memcpy( crypto_secret->secret[enc_level][1], secret->write_secret, FD_QUIC_SECRET_SZ );
2657 :
2658 24084 : conn->keys_avail = fd_uint_set_bit( conn->keys_avail, (int)enc_level );
2659 :
2660 : /* gen local keys */
2661 24084 : fd_quic_gen_keys(
2662 24084 : &conn->keys[enc_level][0],
2663 24084 : conn->secrets.secret[enc_level][0] );
2664 :
2665 : /* gen peer keys */
2666 24084 : fd_quic_gen_keys(
2667 24084 : &conn->keys[enc_level][1],
2668 24084 : conn->secrets.secret[enc_level][1] );
2669 :
2670 24084 : if( enc_level==fd_quic_enc_level_appdata_id ) {
2671 12042 : fd_quic_key_update_derive( &conn->secrets, conn->new_keys );
2672 12042 : }
2673 :
2674 : /* Key logging */
2675 :
2676 24084 : void * keylog_ctx = quic->cb.quic_ctx;
2677 24084 : fd_quic_cb_tls_keylog_t keylog_fn = quic->cb.tls_keylog;
2678 24084 : if( FD_UNLIKELY( keylog_fn ) ) {
2679 : /* Ignore stdout, stderr, stdin */
2680 :
2681 24084 : uchar const * recv_secret = secret->read_secret;
2682 24084 : uchar const * send_secret = secret->write_secret;
2683 :
2684 24084 : uchar const * client_secret = hs->is_server ? recv_secret : send_secret;
2685 24084 : uchar const * server_secret = hs->is_server ? send_secret : recv_secret;
2686 :
2687 24084 : char buf[256];
2688 24084 : char * s;
2689 24084 : switch( enc_level ) {
2690 12042 : case FD_TLS_LEVEL_HANDSHAKE:
2691 12042 : /* 0 chars */ s = fd_cstr_init( buf );
2692 12042 : /* 0+32 chars */ s = fd_cstr_append_cstr( s, "CLIENT_HANDSHAKE_TRAFFIC_SECRET " );
2693 12042 : /* 32+64 chars */ s = fd_hex_encode( s, hs->hs.base.client_random, 32UL );
2694 12042 : /* 96+ 1 chars */ s = fd_cstr_append_char( s, ' ' );
2695 12042 : /* 97+64 chars */ s = fd_hex_encode( s, client_secret, 32UL );
2696 12042 : /* 161 chars */ fd_cstr_fini( s );
2697 12042 : keylog_fn( keylog_ctx, buf );
2698 12042 : /* 0 chars */ s = fd_cstr_init( buf );
2699 12042 : /* 0+32 chars */ s = fd_cstr_append_cstr( s, "SERVER_HANDSHAKE_TRAFFIC_SECRET " );
2700 12042 : /* 32+64 chars */ s = fd_hex_encode( s, hs->hs.base.client_random, 32UL );
2701 12042 : /* 96+ 1 chars */ s = fd_cstr_append_char( s, ' ' );
2702 12042 : /* 97+64 chars */ s = fd_hex_encode( s, server_secret, 32UL );
2703 12042 : /* 161 chars */ fd_cstr_fini( s );
2704 12042 : keylog_fn( keylog_ctx, buf );
2705 12042 : break;
2706 12042 : case FD_TLS_LEVEL_APPLICATION:
2707 12042 : /* 0 chars */ s = fd_cstr_init( buf );
2708 12042 : /* 0+24 chars */ s = fd_cstr_append_cstr( s, "CLIENT_TRAFFIC_SECRET_0 " );
2709 12042 : /* 24+64 chars */ s = fd_hex_encode( s, hs->hs.base.client_random, 32UL );
2710 12042 : /* 88+ 1 chars */ s = fd_cstr_append_char( s, ' ' );
2711 12042 : /* 89+64 chars */ s = fd_hex_encode( s, client_secret, 32UL );
2712 12042 : /* 153 chars */ fd_cstr_fini( s );
2713 12042 : keylog_fn( keylog_ctx, buf );
2714 12042 : /* 0 chars */ s = fd_cstr_init( buf );
2715 12042 : /* 0+24 chars */ s = fd_cstr_append_cstr( s, "SERVER_TRAFFIC_SECRET_0 " );
2716 12042 : /* 24+64 chars */ s = fd_hex_encode( s, hs->hs.base.client_random, 32UL );
2717 12042 : /* 88+ 1 chars */ s = fd_cstr_append_char( s, ' ' );
2718 12042 : /* 89+64 chars */ s = fd_hex_encode( s, server_secret, 32UL );
2719 12042 : /* 153 chars */ fd_cstr_fini( s );
2720 12042 : keylog_fn( keylog_ctx, buf );
2721 12042 : break;
2722 24084 : }
2723 24084 : }
2724 :
2725 24084 : }
2726 :
2727 : void
2728 : fd_quic_apply_peer_params( fd_quic_conn_t * conn,
2729 12048 : fd_quic_transport_params_t const * peer_tp ) {
2730 : /* flow control parameters */
2731 12048 : conn->tx_max_data = peer_tp->initial_max_data;
2732 12048 : conn->tx_initial_max_stream_data_uni= peer_tp->initial_max_stream_data_uni;
2733 :
2734 12048 : if( !conn->server ) {
2735 : /* verify retry_src_conn_id */
2736 6024 : uint retry_src_conn_id_sz = conn->retry_src_conn_id.sz;
2737 6024 : if( retry_src_conn_id_sz ) {
2738 3 : if( FD_UNLIKELY( !peer_tp->retry_source_connection_id_present
2739 3 : || peer_tp->retry_source_connection_id_len != retry_src_conn_id_sz
2740 3 : || 0 != memcmp( peer_tp->retry_source_connection_id,
2741 3 : conn->retry_src_conn_id.conn_id,
2742 3 : retry_src_conn_id_sz ) ) ) {
2743 0 : fd_quic_conn_error( conn, FD_QUIC_CONN_REASON_TRANSPORT_PARAMETER_ERROR, __LINE__ );
2744 0 : return;
2745 0 : }
2746 6021 : } else {
2747 6021 : if( FD_UNLIKELY( peer_tp->retry_source_connection_id_present ) ) {
2748 0 : fd_quic_conn_error( conn, FD_QUIC_CONN_REASON_TRANSPORT_PARAMETER_ERROR, __LINE__ );
2749 0 : return;
2750 0 : }
2751 6021 : }
2752 6024 : }
2753 :
2754 : /* max datagram size */
2755 12048 : ulong tx_max_datagram_sz = peer_tp->max_udp_payload_size;
2756 12048 : if( tx_max_datagram_sz < FD_QUIC_INITIAL_PAYLOAD_SZ_MAX ) {
2757 3 : tx_max_datagram_sz = FD_QUIC_INITIAL_PAYLOAD_SZ_MAX;
2758 3 : }
2759 12048 : if( tx_max_datagram_sz > FD_QUIC_INITIAL_PAYLOAD_SZ_MAX ) {
2760 12045 : tx_max_datagram_sz = FD_QUIC_INITIAL_PAYLOAD_SZ_MAX;
2761 12045 : }
2762 12048 : conn->tx_max_datagram_sz = (uint)tx_max_datagram_sz;
2763 :
2764 : /* initial max_streams */
2765 :
2766 12048 : if( conn->server ) {
2767 6024 : conn->tx_sup_stream_id = ( (ulong)peer_tp->initial_max_streams_uni << 2UL ) + FD_QUIC_STREAM_TYPE_UNI_SERVER;
2768 6024 : } else {
2769 6024 : conn->tx_sup_stream_id = ( (ulong)peer_tp->initial_max_streams_uni << 2UL ) + FD_QUIC_STREAM_TYPE_UNI_CLIENT;
2770 6024 : }
2771 :
2772 : /* set the max_idle_timeout to the min of our and peer max_idle_timeout */
2773 12048 : if( peer_tp->max_idle_timeout_ms ) {
2774 12042 : double peer_max_idle_timeout_us = (double)peer_tp->max_idle_timeout_ms * 1e3;
2775 12042 : ulong peer_max_idle_timeout_ticks = fd_quic_us_to_ticks( conn->quic, (ulong)peer_max_idle_timeout_us );
2776 12042 : conn->idle_timeout_ticks = fd_ulong_min( peer_max_idle_timeout_ticks, conn->idle_timeout_ticks );
2777 12042 : }
2778 :
2779 : /* set ack_delay_exponent so we can properly interpret peer's ack_delays
2780 : if unspecified, the value is 3 */
2781 12048 : ulong peer_ack_delay_exponent = fd_ulong_if(
2782 12048 : peer_tp->ack_delay_exponent_present,
2783 12048 : peer_tp->ack_delay_exponent,
2784 12048 : 3UL );
2785 :
2786 12048 : float tick_per_us = (float)conn->quic->config.tick_per_us;
2787 12048 : conn->peer_ack_delay_scale = (float)( 1UL << peer_ack_delay_exponent ) * tick_per_us;
2788 :
2789 : /* peer max ack delay in microseconds
2790 : peer_tp->max_ack_delay is milliseconds */
2791 12048 : float peer_max_ack_delay_us = (float)fd_ulong_if(
2792 12048 : peer_tp->max_ack_delay_present,
2793 12048 : peer_tp->max_ack_delay * 1000UL,
2794 12048 : 25000UL );
2795 12048 : conn->peer_max_ack_delay_ticks = peer_max_ack_delay_us * tick_per_us;
2796 :
2797 12048 : conn->transport_params_set = 1;
2798 12048 : }
2799 :
2800 : void
2801 : fd_quic_tls_cb_peer_params( void * context,
2802 : uchar const * peer_tp_enc,
2803 12045 : ulong peer_tp_enc_sz ) {
2804 12045 : fd_quic_conn_t * conn = (fd_quic_conn_t*)context;
2805 :
2806 : /* decode peer transport parameters */
2807 12045 : fd_quic_transport_params_t peer_tp[1] = {0};
2808 12045 : int rc = fd_quic_decode_transport_params( peer_tp, peer_tp_enc, peer_tp_enc_sz );
2809 12045 : if( FD_UNLIKELY( rc != 0 ) ) {
2810 0 : FD_DEBUG( FD_LOG_NOTICE(( "fd_quic_decode_transport_params failed" )); )
2811 :
2812 : /* failed to parse transport params */
2813 0 : fd_quic_conn_error( conn, FD_QUIC_CONN_REASON_TRANSPORT_PARAMETER_ERROR, __LINE__ );
2814 0 : return;
2815 0 : }
2816 :
2817 12045 : fd_quic_apply_peer_params( conn, peer_tp );
2818 12045 : }
2819 :
2820 : void
2821 : fd_quic_tls_cb_handshake_complete( fd_quic_tls_hs_t * hs,
2822 12042 : void * context ) {
2823 12042 : (void)hs;
2824 12042 : fd_quic_conn_t * conn = (fd_quic_conn_t *)context;
2825 :
2826 : /* need to send quic handshake completion */
2827 12042 : switch( conn->state ) {
2828 0 : case FD_QUIC_CONN_STATE_ABORT:
2829 0 : case FD_QUIC_CONN_STATE_CLOSE_PENDING:
2830 0 : case FD_QUIC_CONN_STATE_DEAD:
2831 : /* ignore */
2832 0 : return;
2833 :
2834 12042 : case FD_QUIC_CONN_STATE_HANDSHAKE:
2835 12042 : if( FD_UNLIKELY( !conn->transport_params_set ) ) { /* unreachable */
2836 0 : FD_LOG_WARNING(( "Handshake marked as completed but transport params are not set. This is a bug!" ));
2837 0 : fd_quic_conn_error( conn, FD_QUIC_CONN_REASON_INTERNAL_ERROR, __LINE__ );
2838 0 : return;
2839 0 : }
2840 12042 : conn->handshake_complete = 1;
2841 12042 : fd_quic_set_conn_state( conn, FD_QUIC_CONN_STATE_HANDSHAKE_COMPLETE );
2842 12042 : return;
2843 :
2844 0 : default:
2845 0 : FD_LOG_WARNING(( "handshake in unexpected state: %u", conn->state ));
2846 12042 : }
2847 12042 : }
2848 :
2849 : static ulong
2850 : fd_quic_handle_crypto_frame( fd_quic_frame_ctx_t * context,
2851 : fd_quic_crypto_frame_t * crypto,
2852 : uchar const * p,
2853 42156 : ulong p_sz ) {
2854 : /* determine whether any of the data was already provided */
2855 42156 : fd_quic_conn_t * conn = context->conn;
2856 42156 : fd_quic_tls_hs_t * tls_hs = conn->tls_hs;
2857 42156 : uint enc_level = context->pkt->enc_level;
2858 :
2859 : /* offset expected */
2860 42156 : ulong rcv_off = crypto->offset; /* in [0,2^62-1] */
2861 42156 : ulong rcv_sz = crypto->length; /* in [0,2^62-1] */
2862 42156 : ulong rcv_hi = rcv_off + rcv_sz; /* in [0,2^63-1] */
2863 :
2864 42156 : if( FD_UNLIKELY( rcv_sz > p_sz ) ) {
2865 6 : fd_quic_frame_error( context, FD_QUIC_CONN_REASON_FRAME_ENCODING_ERROR, __LINE__ );
2866 6 : return FD_QUIC_PARSE_FAIL;
2867 6 : }
2868 :
2869 42150 : if( !tls_hs ) {
2870 : /* Handshake already completed. Ignore frame */
2871 : /* TODO consider aborting conn if too many unsolicited crypto frames arrive */
2872 0 : return rcv_sz;
2873 0 : }
2874 :
2875 42150 : if( enc_level < tls_hs->rx_enc_level ) {
2876 0 : return rcv_sz;
2877 0 : }
2878 :
2879 42150 : if( enc_level > tls_hs->rx_enc_level ) {
2880 : /* Discard data from any previous handshake level. Currently only
2881 : happens at the Initial->Handshake encryption level change. */
2882 12042 : tls_hs->rx_enc_level = (uchar)enc_level;
2883 12042 : tls_hs->rx_off = 0;
2884 12042 : tls_hs->rx_sz = 0;
2885 12042 : }
2886 :
2887 42150 : if( rcv_off > tls_hs->rx_sz ) {
2888 0 : context->pkt->ack_flag |= ACK_FLAG_CANCEL;
2889 0 : return rcv_sz;
2890 0 : }
2891 :
2892 42150 : if( rcv_hi < tls_hs->rx_off ) {
2893 0 : return rcv_sz;
2894 0 : }
2895 :
2896 42150 : if( rcv_hi > FD_QUIC_TLS_RX_DATA_SZ ) {
2897 0 : fd_quic_frame_error( context, FD_QUIC_CONN_REASON_CRYPTO_BUFFER_EXCEEDED, __LINE__ );
2898 0 : return FD_QUIC_PARSE_FAIL;
2899 0 : }
2900 :
2901 42150 : tls_hs->rx_sz = (ushort)rcv_hi;
2902 42150 : fd_memcpy( tls_hs->rx_hs_buf + rcv_off, p, rcv_sz );
2903 :
2904 42150 : int provide_rc = fd_quic_tls_process( conn->tls_hs );
2905 42150 : if( provide_rc == FD_QUIC_FAILED ) {
2906 : /* if TLS fails, ABORT connection */
2907 :
2908 : /* if TLS returns an error, we present that as reason:
2909 : FD_QUIC_CONN_REASON_CRYPTO_BASE + tls-alert
2910 : otherwise, send INTERNAL_ERROR */
2911 3 : uint alert = conn->tls_hs->alert;
2912 3 : uint reason = conn->tls_hs->hs.base.reason;
2913 3 : FD_DTRACE_PROBE_3( quic_handle_crypto_frame, conn->our_conn_id, alert, reason );
2914 3 : if( alert == 0u ) {
2915 0 : fd_quic_frame_error( context, FD_QUIC_CONN_REASON_INTERNAL_ERROR, __LINE__ );
2916 3 : } else {
2917 3 : FD_DEBUG(
2918 3 : FD_LOG_DEBUG(( "QUIC TLS handshake failed (alert %u-%s; reason %u-%s)",
2919 3 : alert, fd_tls_alert_cstr( alert ),
2920 3 : reason, fd_tls_reason_cstr( reason ) ));
2921 3 : )
2922 3 : fd_quic_frame_error( context, FD_QUIC_CONN_REASON_CRYPTO_BASE + alert, __LINE__ );
2923 3 : }
2924 3 : return FD_QUIC_PARSE_FAIL;
2925 3 : }
2926 :
2927 42147 : return rcv_sz;
2928 42150 : }
2929 :
2930 : static int
2931 : fd_quic_svc_poll( fd_quic_t * quic,
2932 : fd_quic_conn_t * conn,
2933 13555030 : ulong now ) {
2934 13555030 : fd_quic_state_t * state = fd_quic_get_state( quic );
2935 13555030 : if( FD_UNLIKELY( conn->state == FD_QUIC_CONN_STATE_INVALID ) ) {
2936 : /* connection shouldn't have been scheduled,
2937 : and is now removed, so just continue */
2938 0 : FD_LOG_ERR(( "Invalid conn in schedule (svc_type=%u)", conn->svc_type ));
2939 0 : return 1;
2940 0 : }
2941 :
2942 : //FD_DEBUG( FD_LOG_DEBUG(( "svc_poll conn=%p svc_type=%u", (void *)conn, conn->svc_type )); )
2943 13555030 : conn->svc_type = UINT_MAX;
2944 13555030 : conn->svc_time = LONG_MAX;
2945 :
2946 13555030 : if( FD_UNLIKELY( now >= conn->last_activity + ( conn->idle_timeout_ticks / 2 ) ) ) {
2947 2106 : if( FD_UNLIKELY( now >= conn->last_activity + conn->idle_timeout_ticks ) ) {
2948 2094 : if( FD_LIKELY( conn->state != FD_QUIC_CONN_STATE_DEAD ) ) {
2949 : /* rfc9000 10.1 Idle Timeout
2950 : "... the connection is silently closed and its state is discarded
2951 : when it remains idle for longer than the minimum of the
2952 : max_idle_timeout value advertised by both endpoints." */
2953 2094 : FD_DEBUG( FD_LOG_WARNING(("%s conn %p conn_idx: %u closing due to idle timeout (%g ms)",
2954 2094 : conn->server?"SERVER":"CLIENT",
2955 2094 : (void *)conn, conn->conn_idx, (double)fd_quic_ticks_to_us(conn->idle_timeout_ticks) / 1e3 )); )
2956 :
2957 2094 : fd_quic_set_conn_state( conn, FD_QUIC_CONN_STATE_DEAD );
2958 2094 : quic->metrics.conn_timeout_cnt++;
2959 2094 : }
2960 2094 : } else if( quic->config.keep_alive ) {
2961 : /* send PING */
2962 3 : if( !( conn->flags & FD_QUIC_CONN_FLAGS_PING ) ) {
2963 3 : conn->flags |= FD_QUIC_CONN_FLAGS_PING;
2964 3 : conn->upd_pkt_number = FD_QUIC_PKT_NUM_PENDING; /* update to be sent in next packet */
2965 3 : }
2966 3 : }
2967 2106 : }
2968 :
2969 13555030 : if( FD_UNLIKELY( conn->state == FD_QUIC_CONN_STATE_DEAD ) ) {
2970 2094 : fd_quic_cb_conn_final( quic, conn ); /* inform user before freeing */
2971 2094 : fd_quic_conn_free( quic, conn );
2972 2094 : return 1; /* do NOT reschedule freed connection */
2973 2094 : }
2974 :
2975 : /* state cannot be DEAD here */
2976 13552936 : fd_quic_conn_service( quic, conn, now );
2977 :
2978 : /* dead? don't reinsert, just clean up */
2979 13552936 : switch( conn->state ) {
2980 0 : case FD_QUIC_CONN_STATE_INVALID:
2981 : /* skip entirely */
2982 0 : break;
2983 12108 : case FD_QUIC_CONN_STATE_DEAD:
2984 12108 : fd_quic_cb_conn_final( quic, conn ); /* inform user before freeing */
2985 12108 : fd_quic_conn_free( quic, conn );
2986 12108 : break;
2987 13540828 : default:
2988 13540828 : fd_quic_svc_schedule( state, conn, FD_QUIC_SVC_WAIT );
2989 13540828 : break;
2990 13552936 : }
2991 :
2992 13552936 : return 1;
2993 13552936 : }
2994 :
2995 : static int
2996 : fd_quic_svc_poll_head( fd_quic_t * quic,
2997 : uint svc_type,
2998 210852080 : ulong now ) {
2999 210852080 : fd_quic_state_t * state = fd_quic_get_state( quic );
3000 :
3001 : /* Peek head of queue */
3002 210852080 : fd_quic_svc_queue_t * queue = &state->svc_queue[ svc_type ];
3003 210852080 : if( queue->head==UINT_MAX ) return 0;
3004 162611697 : fd_quic_conn_t * conn = fd_quic_conn_at_idx( state, queue->head );
3005 162611697 : if( conn->svc_time > now ) return 0;
3006 :
3007 : /* Remove head of queue */
3008 3066 : uint prev_idx = conn->svc_prev;
3009 3066 : fd_quic_conn_t * prev_ele = fd_quic_conn_at_idx( state, prev_idx );
3010 3066 : *fd_ptr_if( prev_idx!=UINT_MAX, &prev_ele->svc_next, &queue->tail ) = UINT_MAX;
3011 3066 : queue->head = prev_idx;
3012 :
3013 3066 : return fd_quic_svc_poll( quic, conn, now );
3014 162611697 : }
3015 :
3016 : static int
3017 : fd_quic_svc_poll_tail( fd_quic_t * quic,
3018 : uint svc_type,
3019 105426040 : ulong now ) {
3020 105426040 : fd_quic_state_t * state = fd_quic_get_state( quic );
3021 :
3022 : /* Peek tail of queue */
3023 105426040 : fd_quic_svc_queue_t * queue = &state->svc_queue[ svc_type ];
3024 105426040 : if( queue->tail==UINT_MAX ) return 0;
3025 13551964 : fd_quic_conn_t * conn = fd_quic_conn_at_idx( state, queue->tail );
3026 13551964 : if( conn->svc_time > now ) return 0;
3027 :
3028 : /* Remove tail of queue */
3029 13551964 : uint next_idx = conn->svc_next;
3030 13551964 : fd_quic_conn_t * next_ele = fd_quic_conn_at_idx( state, next_idx );
3031 13551964 : *fd_ptr_if( next_idx!=UINT_MAX, &next_ele->svc_prev, &queue->head ) = UINT_MAX;
3032 13551964 : queue->tail = next_idx;
3033 :
3034 13551964 : return fd_quic_svc_poll( quic, conn, now );
3035 13551964 : }
3036 :
3037 : int
3038 105426040 : fd_quic_service( fd_quic_t * quic ) {
3039 105426040 : fd_quic_state_t * state = fd_quic_get_state( quic );
3040 :
3041 105426040 : ulong now = fd_quic_now( quic );
3042 105426040 : state->now = now;
3043 :
3044 105426040 : long now_ticks = fd_tickcount();
3045 :
3046 105426040 : int cnt = 0;
3047 105426040 : cnt += fd_quic_svc_poll_tail( quic, FD_QUIC_SVC_INSTANT, now );
3048 105426040 : cnt += fd_quic_svc_poll_head( quic, FD_QUIC_SVC_ACK_TX, now );
3049 105426040 : cnt += fd_quic_svc_poll_head( quic, FD_QUIC_SVC_WAIT, now );
3050 :
3051 105426040 : long delta_ticks = fd_tickcount() - now_ticks;
3052 :
3053 105426040 : fd_histf_sample( quic->metrics.service_duration, (ulong)delta_ticks );
3054 :
3055 105426040 : return cnt;
3056 105426040 : }
3057 :
3058 : static inline ulong
3059 13575724 : fd_quic_conn_tx_buf_remaining( fd_quic_conn_t * conn ) {
3060 13575724 : return (ulong)( sizeof( conn->tx_buf_conn ) - (ulong)( conn->tx_ptr - conn->tx_buf_conn ) );
3061 13575724 : }
3062 :
3063 : /* attempt to transmit buffered data
3064 :
3065 : prior to call, conn->tx_ptr points to the first free byte in tx_buf
3066 : the data in tx_buf..tx_ptr is prepended by networking headers
3067 : and put on the wire
3068 :
3069 : returns 0 if successful, or 1 otherwise */
3070 : uint
3071 : fd_quic_tx_buffered_raw(
3072 : fd_quic_t * quic,
3073 : uchar ** tx_ptr_ptr,
3074 : uchar * tx_buf,
3075 : ushort * ipv4_id,
3076 : uint dst_ipv4_addr,
3077 : ushort dst_udp_port,
3078 : uint src_ipv4_addr,
3079 : ushort src_udp_port
3080 27104633 : ) {
3081 :
3082 : /* TODO leave space at front of tx_buf for header
3083 : then encode directly into it to avoid 1 copy */
3084 27104633 : uchar *tx_ptr = *tx_ptr_ptr;
3085 27104633 : long payload_sz = tx_ptr - tx_buf;
3086 :
3087 : /* nothing to do */
3088 27104633 : if( FD_UNLIKELY( payload_sz<=0L ) ) {
3089 13534825 : return 0u;
3090 13534825 : }
3091 :
3092 13569808 : fd_quic_config_t * config = &quic->config;
3093 13569808 : fd_quic_state_t * state = fd_quic_get_state( quic );
3094 :
3095 13569808 : uchar * const crypt_scratch = state->crypt_scratch;
3096 :
3097 13569808 : uchar * cur_ptr = state->crypt_scratch;
3098 13569808 : ulong cur_sz = sizeof( state->crypt_scratch );
3099 :
3100 : /* TODO much of this may be prepared ahead of time */
3101 13569808 : fd_quic_pkt_t pkt;
3102 :
3103 13569808 : pkt.ip4->verihl = FD_IP4_VERIHL(4,5);
3104 13569808 : pkt.ip4->tos = (uchar)(config->net.dscp << 2); /* could make this per-connection or per-stream */
3105 13569808 : pkt.ip4->net_tot_len = (ushort)( 20 + 8 + payload_sz );
3106 13569808 : pkt.ip4->net_id = *ipv4_id;
3107 13569808 : pkt.ip4->net_frag_off = 0x4000u; /* don't fragment */
3108 13569808 : pkt.ip4->ttl = 64; /* TODO make configurable */
3109 13569808 : pkt.ip4->protocol = FD_IP4_HDR_PROTOCOL_UDP;
3110 13569808 : pkt.ip4->check = 0;
3111 13569808 : pkt.ip4->saddr = src_ipv4_addr;
3112 13569808 : pkt.ip4->daddr = dst_ipv4_addr;
3113 13569808 : pkt.udp->net_sport = src_udp_port;
3114 13569808 : pkt.udp->net_dport = dst_udp_port;
3115 13569808 : pkt.udp->net_len = (ushort)( 8 + payload_sz );
3116 13569808 : pkt.udp->check = 0x0000;
3117 13569808 : *ipv4_id = (ushort)( *ipv4_id + 1 );
3118 :
3119 13569808 : ulong rc = fd_quic_encode_ip4( cur_ptr, cur_sz, pkt.ip4 );
3120 13569808 : if( FD_UNLIKELY( rc == FD_QUIC_PARSE_FAIL ) ) {
3121 0 : FD_LOG_ERR(( "fd_quic_encode_ip4 failed with buffer overrun" ));
3122 0 : }
3123 :
3124 : /* Compute checksum over network byte order header */
3125 13569808 : fd_ip4_hdr_t * ip4_encoded = (fd_ip4_hdr_t *)fd_type_pun( cur_ptr );
3126 13569808 : ip4_encoded->check = (ushort)fd_ip4_hdr_check_fast( ip4_encoded );
3127 :
3128 13569808 : cur_ptr += rc;
3129 13569808 : cur_sz -= rc;
3130 :
3131 13569808 : rc = fd_quic_encode_udp( cur_ptr, cur_sz, pkt.udp );
3132 13569808 : if( FD_UNLIKELY( rc == FD_QUIC_PARSE_FAIL ) ) {
3133 0 : FD_LOG_ERR(( "fd_quic_encode_udp failed with buffer overrun" ));
3134 0 : }
3135 :
3136 13569808 : cur_ptr += rc;
3137 13569808 : cur_sz -= rc;
3138 :
3139 : /* need enough space for payload */
3140 13569808 : if( FD_UNLIKELY( (ulong)payload_sz > cur_sz ) ) {
3141 0 : FD_LOG_WARNING(( "%s : payload too big for buffer", __func__ ));
3142 :
3143 : /* reset buffer, since we can't use its contents */
3144 0 : *tx_ptr_ptr = tx_buf;
3145 0 : return FD_QUIC_FAILED;
3146 0 : }
3147 13569808 : fd_memcpy( cur_ptr, tx_buf, (ulong)payload_sz );
3148 :
3149 13569808 : cur_ptr += (ulong)payload_sz;
3150 13569808 : cur_sz -= (ulong)payload_sz;
3151 :
3152 13569808 : fd_aio_pkt_info_t aio_buf = { .buf = crypt_scratch, .buf_sz = (ushort)( cur_ptr - crypt_scratch ) };
3153 13569808 : int aio_rc = fd_aio_send( &quic->aio_tx, &aio_buf, 1, NULL, 1 );
3154 13569808 : if( aio_rc == FD_AIO_ERR_AGAIN ) {
3155 : /* transient condition - try later */
3156 0 : return FD_QUIC_FAILED;
3157 13569808 : } else if( aio_rc != FD_AIO_SUCCESS ) {
3158 0 : FD_LOG_WARNING(( "Fatal error reported by aio peer" ));
3159 : /* fallthrough to reset buffer */
3160 0 : }
3161 :
3162 : /* after send, reset tx_ptr and tx_sz */
3163 13569808 : *tx_ptr_ptr = tx_buf;
3164 :
3165 13569808 : quic->metrics.net_tx_pkt_cnt += aio_rc==FD_AIO_SUCCESS;
3166 13569808 : if( FD_LIKELY( aio_rc==FD_AIO_SUCCESS ) ) {
3167 13569808 : quic->metrics.net_tx_byte_cnt += aio_buf.buf_sz;
3168 13569808 : }
3169 :
3170 13569808 : return FD_QUIC_SUCCESS; /* success */
3171 13569808 : }
3172 :
3173 : uint
3174 : fd_quic_tx_buffered( fd_quic_t * quic,
3175 27104528 : fd_quic_conn_t * conn ) {
3176 27104528 : fd_quic_net_endpoint_t const * endpoint = conn->peer;
3177 27104528 : return fd_quic_tx_buffered_raw(
3178 27104528 : quic,
3179 27104528 : &conn->tx_ptr,
3180 27104528 : conn->tx_buf_conn,
3181 27104528 : &conn->ipv4_id,
3182 27104528 : endpoint->ip_addr,
3183 27104528 : endpoint->udp_port,
3184 27104528 : conn->host.ip_addr,
3185 27104528 : conn->host.udp_port);
3186 27104528 : }
3187 :
3188 : static inline int
3189 : fd_quic_conn_can_acquire_pkt_meta( fd_quic_conn_t * conn,
3190 26655068 : fd_quic_pkt_meta_tracker_t * tracker ) {
3191 26655068 : fd_quic_state_t * state = fd_quic_get_state( conn->quic );
3192 26655068 : fd_quic_metrics_t * metrics = &conn->quic->metrics;
3193 :
3194 26655068 : ulong pool_free = fd_quic_pkt_meta_pool_free( tracker->pool );
3195 26655068 : if( !pool_free || conn->used_pkt_meta >= state->max_inflight_frame_cnt_conn ) {
3196 48 : if( !pool_free ) {
3197 45 : metrics->frame_tx_alloc_cnt[FD_METRICS_ENUM_FRAME_TX_ALLOC_RESULT_V_FAIL_EMPTY_POOL_IDX]++;
3198 45 : } else {
3199 3 : metrics->frame_tx_alloc_cnt[FD_METRICS_ENUM_FRAME_TX_ALLOC_RESULT_V_FAIL_CONN_MAX_IDX]++;
3200 3 : }
3201 48 : return 0;
3202 48 : }
3203 26655020 : metrics->frame_tx_alloc_cnt[FD_METRICS_ENUM_FRAME_TX_ALLOC_RESULT_V_SUCCESS_IDX]++;
3204 :
3205 26655020 : return 1;
3206 26655068 : }
3207 :
3208 : /* fd_quic_gen_frame_store_pkt_meta stores a pkt_meta into tracker.
3209 : Value and type take the passed args; all other fields are copied
3210 : from pkt_meta_tmpl. Returns 1 if successful, 0 if not.
3211 : Failure reasons include empty pkt_meta pool, or this conn reached
3212 : its pkt_meta limit. Theoretically only need latter, but let's be safe! */
3213 : static inline int
3214 : fd_quic_gen_frame_store_pkt_meta( const fd_quic_pkt_meta_t * pkt_meta_tmpl,
3215 : uchar type,
3216 : fd_quic_pkt_meta_value_t value,
3217 : fd_quic_pkt_meta_tracker_t * tracker,
3218 13336639 : fd_quic_conn_t * conn ) {
3219 13336639 : if( !fd_quic_conn_can_acquire_pkt_meta( conn, tracker ) ) return 0;
3220 :
3221 13336594 : conn->used_pkt_meta++;
3222 13336594 : fd_quic_pkt_meta_t * pkt_meta = fd_quic_pkt_meta_pool_ele_acquire( tracker->pool );
3223 13336594 : *pkt_meta = *pkt_meta_tmpl;
3224 13336594 : FD_QUIC_PKT_META_SET_TYPE( pkt_meta, type );
3225 13336594 : pkt_meta->val = value;
3226 13336594 : fd_quic_pkt_meta_insert( &tracker->sent_pkt_metas[pkt_meta->enc_level], pkt_meta, tracker->pool );
3227 13336594 : return 1;
3228 13336639 : }
3229 :
3230 : static ulong
3231 : fd_quic_gen_close_frame( fd_quic_conn_t * conn,
3232 : uchar * payload_ptr,
3233 : uchar * payload_end,
3234 : const fd_quic_pkt_meta_t * pkt_meta_tmpl,
3235 18108 : fd_quic_pkt_meta_tracker_t * tracker ) {
3236 :
3237 18108 : if( conn->flags & FD_QUIC_CONN_FLAGS_CLOSE_SENT ) return 0UL;
3238 12108 : conn->flags |= FD_QUIC_CONN_FLAGS_CLOSE_SENT;
3239 :
3240 12108 : ulong frame_sz;
3241 12108 : if( conn->reason != 0u || conn->state == FD_QUIC_CONN_STATE_PEER_CLOSE ) {
3242 6084 : fd_quic_conn_close_0_frame_t frame = {
3243 6084 : .error_code = conn->reason,
3244 6084 : .frame_type = 0u, /* we do not know the frame in question */
3245 6084 : .reason_phrase_length = 0u /* no reason phrase */
3246 6084 : };
3247 6084 : frame_sz = fd_quic_encode_conn_close_0_frame( payload_ptr,
3248 6084 : (ulong)( payload_end - payload_ptr ),
3249 6084 : &frame );
3250 6084 : } else {
3251 6024 : fd_quic_conn_close_1_frame_t frame = {
3252 6024 : .error_code = conn->app_reason,
3253 6024 : .reason_phrase_length = 0u /* no reason phrase */
3254 6024 : };
3255 6024 : frame_sz = fd_quic_encode_conn_close_1_frame( payload_ptr,
3256 6024 : (ulong)( payload_end - payload_ptr ),
3257 6024 : &frame );
3258 6024 : }
3259 :
3260 12108 : if( FD_UNLIKELY( frame_sz == FD_QUIC_PARSE_FAIL ) ) {
3261 0 : FD_LOG_WARNING(( "fd_quic_encode_conn_close_frame failed, but space should have been available" ));
3262 0 : return 0UL;
3263 0 : }
3264 :
3265 : /* create and save pkt_meta, return 0 if fail */
3266 12108 : if( !fd_quic_gen_frame_store_pkt_meta( pkt_meta_tmpl,
3267 12108 : FD_QUIC_PKT_META_TYPE_CLOSE,
3268 12108 : (fd_quic_pkt_meta_value_t){0}, /* value doesn't matter */
3269 12108 : tracker,
3270 12108 : conn )) return 0UL;
3271 :
3272 12108 : return frame_sz;
3273 12108 : }
3274 :
3275 : static uchar *
3276 : fd_quic_gen_handshake_frames( fd_quic_conn_t * conn,
3277 : uchar * payload_ptr,
3278 : uchar * payload_end,
3279 : const fd_quic_pkt_meta_t * pkt_meta_tmpl,
3280 13563673 : fd_quic_pkt_meta_tracker_t * tracker ) {
3281 13563673 : uint enc_level = pkt_meta_tmpl->enc_level;
3282 13563673 : fd_quic_tls_hs_data_t * hs_data = fd_quic_tls_get_hs_data( conn->tls_hs, enc_level );
3283 13563673 : if( !hs_data ) return payload_ptr;
3284 :
3285 : /* confirm we have pkt_meta space */
3286 24087 : if( !fd_quic_conn_can_acquire_pkt_meta( conn, tracker ) ) return payload_ptr;
3287 :
3288 24087 : ulong hs_offset = 0; /* offset within the current hs_data */
3289 24087 : ulong sent_offset = conn->hs_sent_bytes[enc_level];
3290 24087 : ulong ackd_offset = conn->hs_ackd_bytes[enc_level];
3291 : /* offset within stream */
3292 24087 : ulong offset = fd_ulong_max( sent_offset, ackd_offset );
3293 :
3294 : /* track pkt_meta values */
3295 24087 : ulong offset_lo = offset;
3296 24087 : ulong offset_hi = offset;
3297 :
3298 108387 : while( hs_data ) {
3299 : /* skip data we've sent */
3300 84300 : if( hs_data->offset + hs_data->data_sz <= offset ) {
3301 42150 : hs_data = fd_quic_tls_get_next_hs_data( conn->tls_hs, hs_data );
3302 42150 : continue;
3303 42150 : }
3304 :
3305 42150 : if( FD_UNLIKELY( hs_data->offset > offset ) ) {
3306 : /* we have a gap - this shouldn't happen */
3307 0 : FD_LOG_WARNING(( "%s - gap in TLS handshake data", __func__ ));
3308 : /* TODO should probably tear down connection */
3309 0 : break;
3310 0 : }
3311 :
3312 : /* encode hs_data into frame */
3313 42150 : hs_offset = offset - hs_data->offset;
3314 :
3315 : /* handshake data to send */
3316 42150 : uchar const * cur_data = hs_data->data + hs_offset;
3317 42150 : ulong cur_data_sz = hs_data->data_sz - hs_offset;
3318 :
3319 : /* 9 bytes header + cur_data_sz */
3320 42150 : if( payload_ptr + 9UL + cur_data_sz > payload_end ) break;
3321 : /* FIXME reduce cur_data_sz if it doesn't fit in frame
3322 : Practically don't need to, because fd_tls generates a small amount of data */
3323 :
3324 42150 : payload_ptr[0] = 0x06; /* CRYPTO frame */
3325 42150 : uint offset_varint = 0x80U | ( fd_uint_bswap( (uint)offset & 0x3fffffffU ) );
3326 42150 : uint length_varint = 0x80U | ( fd_uint_bswap( (uint)cur_data_sz & 0x3fffffffU ) );
3327 42150 : FD_STORE( uint, payload_ptr+1, offset_varint );
3328 42150 : FD_STORE( uint, payload_ptr+5, length_varint );
3329 42150 : payload_ptr += 9;
3330 :
3331 42150 : fd_memcpy( payload_ptr, cur_data, cur_data_sz );
3332 42150 : payload_ptr += cur_data_sz;
3333 :
3334 : /* update pkt_meta values */
3335 42150 : offset_hi += cur_data_sz;
3336 :
3337 : /* move to next hs_data */
3338 42150 : offset += cur_data_sz;
3339 42150 : conn->hs_sent_bytes[enc_level] += cur_data_sz;
3340 :
3341 : /* TODO load more hs_data into a crypto frame, if available
3342 : currently tricky, because encode_crypto_frame copies payload */
3343 42150 : }
3344 :
3345 : /* update packet meta */
3346 24087 : if( offset_hi > offset_lo ) {
3347 24087 : fd_quic_gen_frame_store_pkt_meta( pkt_meta_tmpl,
3348 24087 : FD_QUIC_PKT_META_TYPE_HS_DATA,
3349 24087 : (fd_quic_pkt_meta_value_t){
3350 24087 : .range = {
3351 24087 : .offset_lo = offset_lo,
3352 24087 : .offset_hi = offset_hi
3353 24087 : }
3354 24087 : },
3355 24087 : tracker,
3356 24087 : conn );
3357 24087 : }
3358 :
3359 24087 : return payload_ptr;
3360 24087 : }
3361 :
3362 : static ulong
3363 : fd_quic_gen_handshake_done_frame( fd_quic_conn_t * conn,
3364 : uchar * payload_ptr,
3365 : uchar * payload_end,
3366 : const fd_quic_pkt_meta_t * pkt_meta_tmpl,
3367 13539586 : fd_quic_pkt_meta_tracker_t * tracker ) {
3368 13539586 : FD_DTRACE_PROBE_1( quic_gen_handshake_done_frame, conn->our_conn_id );
3369 13539586 : if( conn->handshake_done_send==0 ) return 0UL;
3370 6021 : conn->handshake_done_send = 0;
3371 6021 : if( FD_UNLIKELY( conn->handshake_done_ackd ) ) return 0UL;
3372 6021 : if( FD_UNLIKELY( payload_ptr >= payload_end ) ) return 0UL;
3373 : /* send handshake done frame */
3374 6021 : payload_ptr[0] = 0x1E;
3375 :
3376 : /* record the send for retx */
3377 6021 : if( !fd_quic_gen_frame_store_pkt_meta( pkt_meta_tmpl,
3378 6021 : FD_QUIC_PKT_META_TYPE_HS_DONE,
3379 6021 : (fd_quic_pkt_meta_value_t){0}, /* value doesn't matter */
3380 6021 : tracker,
3381 6021 : conn) ) return 0UL;
3382 :
3383 6021 : return 1UL;
3384 6021 : }
3385 :
3386 : static ulong
3387 : fd_quic_gen_max_data_frame( fd_quic_conn_t * conn,
3388 : uchar * payload_ptr,
3389 : uchar * payload_end,
3390 : const fd_quic_pkt_meta_t * pkt_meta_tmpl,
3391 12177 : fd_quic_pkt_meta_tracker_t * tracker ) {
3392 12177 : fd_quic_conn_stream_rx_t * srx = conn->srx;
3393 :
3394 12177 : if( !( conn->flags & FD_QUIC_CONN_FLAGS_MAX_DATA ) ) return 0UL;
3395 0 : if( srx->rx_max_data <= srx->rx_max_data_ackd ) return 0UL; /* peer would ignore anyway */
3396 :
3397 : /* send max_data frame */
3398 0 : fd_quic_max_data_frame_t frame = { .max_data = srx->rx_max_data };
3399 :
3400 : /* attempt to write into buffer */
3401 0 : ulong frame_sz = fd_quic_encode_max_data_frame( payload_ptr,
3402 0 : (ulong)( payload_end - payload_ptr ),
3403 0 : &frame );
3404 0 : if( FD_UNLIKELY( frame_sz==FD_QUIC_ENCODE_FAIL ) ) return 0UL;
3405 :
3406 : /* acquire and set a pkt_meta, return 0 if not successful */
3407 0 : if( !fd_quic_gen_frame_store_pkt_meta( pkt_meta_tmpl,
3408 0 : FD_QUIC_PKT_META_TYPE_MAX_DATA,
3409 0 : (fd_quic_pkt_meta_value_t){
3410 0 : .scalar = srx->rx_max_data
3411 0 : },
3412 0 : tracker,
3413 0 : conn ) ) return 0UL;
3414 :
3415 0 : conn->upd_pkt_number = pkt_meta_tmpl->key.pkt_num;
3416 0 : return frame_sz;
3417 0 : }
3418 :
3419 : static ulong
3420 : fd_quic_gen_max_streams_frame( fd_quic_conn_t * conn,
3421 : uchar * payload_ptr,
3422 : uchar * payload_end,
3423 : const fd_quic_pkt_meta_t * pkt_meta_tmpl,
3424 12177 : fd_quic_pkt_meta_tracker_t * tracker ) {
3425 12177 : fd_quic_conn_stream_rx_t * srx = conn->srx;
3426 :
3427 : /* 0x02 Client-Initiated, Unidirectional
3428 : 0x03 Server-Initiated, Unidirectional */
3429 12177 : ulong max_streams_unidir = srx->rx_sup_stream_id >> 2;
3430 :
3431 12177 : uint flags = conn->flags;
3432 12177 : if( !FD_QUIC_MAX_STREAMS_ALWAYS_UNLESS_ACKED ) {
3433 12177 : if( !( flags & FD_QUIC_CONN_FLAGS_MAX_STREAMS_UNIDIR ) ) return 0UL;
3434 0 : if( max_streams_unidir <= srx->rx_max_streams_unidir_ackd ) return 0UL;
3435 0 : }
3436 :
3437 0 : fd_quic_max_streams_frame_t max_streams = {
3438 0 : .type = 0x13, /* unidirectional */
3439 0 : .max_streams = max_streams_unidir
3440 0 : };
3441 0 : ulong frame_sz = fd_quic_encode_max_streams_frame( payload_ptr,
3442 0 : (ulong)( payload_end - payload_ptr ),
3443 0 : &max_streams );
3444 0 : if( FD_UNLIKELY( frame_sz==FD_QUIC_ENCODE_FAIL ) ) return 0UL;
3445 :
3446 0 : if( !fd_quic_gen_frame_store_pkt_meta( pkt_meta_tmpl,
3447 0 : FD_QUIC_PKT_META_TYPE_MAX_STREAMS_UNIDIR,
3448 0 : (fd_quic_pkt_meta_value_t){0}, /* value doesn't matter */
3449 0 : tracker,
3450 0 : conn ) ) return 0UL;
3451 :
3452 0 : conn->flags = flags & (~FD_QUIC_CONN_FLAGS_MAX_STREAMS_UNIDIR);
3453 0 : conn->upd_pkt_number = pkt_meta_tmpl->key.pkt_num;
3454 0 : return frame_sz;
3455 0 : }
3456 :
3457 : static ulong
3458 : fd_quic_gen_ping_frame( fd_quic_conn_t * conn,
3459 : uchar * payload_ptr,
3460 : uchar * payload_end,
3461 : const fd_quic_pkt_meta_t * pkt_meta_tmpl,
3462 12177 : fd_quic_pkt_meta_tracker_t * tracker ) {
3463 :
3464 12177 : if( ~conn->flags & FD_QUIC_CONN_FLAGS_PING ) return 0UL;
3465 84 : if( conn->flags & FD_QUIC_CONN_FLAGS_PING_SENT ) return 0UL;
3466 :
3467 84 : fd_quic_ping_frame_t ping = {0};
3468 84 : ulong frame_sz = fd_quic_encode_ping_frame( payload_ptr,
3469 84 : (ulong)( payload_end - payload_ptr ),
3470 84 : &ping );
3471 84 : if( FD_UNLIKELY( frame_sz==FD_QUIC_ENCODE_FAIL ) ) return 0UL;
3472 84 : conn->flags |= FD_QUIC_CONN_FLAGS_PING_SENT;
3473 84 : conn->flags &= ~FD_QUIC_CONN_FLAGS_PING;
3474 :
3475 84 : conn->upd_pkt_number = pkt_meta_tmpl->key.pkt_num;
3476 : /* record the send for retx, 0 if fail */
3477 84 : if( !fd_quic_gen_frame_store_pkt_meta( pkt_meta_tmpl,
3478 84 : FD_QUIC_PKT_META_TYPE_PING,
3479 84 : (fd_quic_pkt_meta_value_t){0}, /* value doesn't matter */
3480 84 : tracker,
3481 84 : conn ) ) return 0UL;
3482 :
3483 39 : return frame_sz;
3484 84 : }
3485 :
3486 : uchar *
3487 : fd_quic_gen_stream_frames( fd_quic_conn_t * conn,
3488 : uchar * payload_ptr,
3489 : uchar * payload_end,
3490 : fd_quic_pkt_meta_t * pkt_meta_tmpl,
3491 13533574 : fd_quic_pkt_meta_tracker_t * tracker ) {
3492 :
3493 : /* loop serves two purposes:
3494 : 1. finds a stream with data to send
3495 : 2. appends max_stream_data frames as necessary */
3496 13533574 : fd_quic_stream_t * sentinel = conn->send_streams;
3497 13533574 : fd_quic_stream_t * cur_stream = sentinel->next;
3498 13533574 : ulong pkt_num = pkt_meta_tmpl->key.pkt_num;
3499 26827916 : while( !cur_stream->sentinel ) {
3500 : /* required, since cur_stream may get removed from list */
3501 13294345 : fd_quic_stream_t * nxt_stream = cur_stream->next;
3502 13294345 : _Bool sent_all_data = 1u;
3503 :
3504 13294345 : if( cur_stream->upd_pkt_number >= pkt_num ) {
3505 :
3506 : /* any stream data? */
3507 13294345 : if( FD_LIKELY( FD_QUIC_STREAM_ACTION( cur_stream ) ) ) {
3508 :
3509 : /* data_avail is the number of stream bytes available for sending.
3510 : fin_flag_set is 1 if no more bytes will get added to the stream. */
3511 13294342 : ulong const data_avail = cur_stream->tx_buf.head - cur_stream->tx_sent;
3512 13294342 : int const fin_flag_set = !!(cur_stream->state & FD_QUIC_STREAM_STATE_TX_FIN);
3513 13294342 : ulong const stream_id = cur_stream->stream_id;
3514 13294342 : ulong const stream_off = cur_stream->tx_sent;
3515 :
3516 : /* No information to send? */
3517 13294342 : if( data_avail==0u && !fin_flag_set ) break;
3518 :
3519 : /* No space to write frame?
3520 : (Buffer should fit max stream header size and at least 1 byte of data) */
3521 13294342 : if( payload_ptr+FD_QUIC_MAX_FOOTPRINT( stream_e_frame )+1 > payload_end ) break;
3522 :
3523 : /* check pkt_meta availability */
3524 13294342 : if( !fd_quic_conn_can_acquire_pkt_meta( conn, tracker ) ) break;
3525 :
3526 : /* Leave placeholder for frame/stream type */
3527 13294339 : uchar * const frame_type_p = payload_ptr++;
3528 13294339 : uint frame_type = 0x0a; /* stream frame with length */
3529 :
3530 : /* Encode stream ID */
3531 13294339 : payload_ptr += fd_quic_varint_encode( payload_ptr, stream_id );
3532 :
3533 : /* Optionally encode offset */
3534 13294339 : if( stream_off>0 ) {
3535 16863 : frame_type |= 0x04; /* with offset field */
3536 16863 : payload_ptr += fd_quic_varint_encode( payload_ptr, stream_off );
3537 16863 : }
3538 :
3539 : /* Leave placeholder for length length */
3540 13294339 : uchar * data_sz_p = payload_ptr;
3541 13294339 : payload_ptr += 2;
3542 :
3543 : /* Stream metadata */
3544 13294339 : ulong data_max = (ulong)payload_end - (ulong)payload_ptr; /* assume no underflow */
3545 13294339 : ulong data_sz = fd_ulong_min( data_avail, data_max );
3546 13294339 : /* */ data_sz = fd_ulong_min( data_sz, 0x3fffUL ); /* max 2 byte varint */
3547 13294339 : /* */ sent_all_data = data_sz == data_avail;
3548 13294339 : _Bool fin = fin_flag_set && sent_all_data;
3549 :
3550 : /* Finish encoding stream header */
3551 13294339 : ushort data_sz_varint = fd_ushort_bswap( (ushort)( 0x4000u | (uint)data_sz ) );
3552 13294339 : FD_STORE( ushort, data_sz_p, data_sz_varint );
3553 13294339 : frame_type |= fin;
3554 13294339 : *frame_type_p = (uchar)frame_type;
3555 :
3556 : /* Write stream payload */
3557 13294339 : fd_quic_buffer_t * tx_buf = &cur_stream->tx_buf;
3558 13294339 : fd_quic_buffer_load( tx_buf, stream_off, payload_ptr, data_sz );
3559 13294339 : payload_ptr += data_sz;
3560 :
3561 : /* Update stream metadata */
3562 13294339 : cur_stream->tx_sent += data_sz;
3563 13294339 : cur_stream->upd_pkt_number = fd_ulong_if( fin, pkt_num, FD_QUIC_PKT_NUM_PENDING );
3564 13294339 : cur_stream->stream_flags &= fd_uint_if( fin, ~FD_QUIC_STREAM_FLAGS_ACTION, UINT_MAX );
3565 :
3566 : /* Packet metadata for potential retransmits */
3567 13294339 : pkt_meta_tmpl->key.stream_id = cur_stream->stream_id;
3568 13294339 : fd_quic_gen_frame_store_pkt_meta( pkt_meta_tmpl,
3569 13294339 : FD_QUIC_PKT_META_TYPE_STREAM,
3570 13294339 : (fd_quic_pkt_meta_value_t){
3571 13294339 : .range = {
3572 13294339 : .offset_lo = stream_off,
3573 13294339 : .offset_hi = stream_off + data_sz
3574 13294339 : }
3575 13294339 : },
3576 13294339 : tracker,
3577 13294339 : conn );
3578 13294339 : }
3579 13294345 : }
3580 :
3581 13294342 : if( sent_all_data ) {
3582 13277554 : cur_stream->stream_flags &= ~FD_QUIC_STREAM_FLAGS_ACTION;
3583 13277554 : FD_QUIC_STREAM_LIST_REMOVE( cur_stream );
3584 13277554 : FD_QUIC_STREAM_LIST_INSERT_BEFORE( conn->used_streams, cur_stream );
3585 13277554 : }
3586 :
3587 13294342 : cur_stream = nxt_stream;
3588 13294342 : }
3589 :
3590 13533574 : return payload_ptr;
3591 13533574 : }
3592 :
3593 : uchar *
3594 : fd_quic_gen_frames( fd_quic_conn_t * conn,
3595 : uchar * payload_ptr,
3596 : uchar * payload_end,
3597 : fd_quic_pkt_meta_t * pkt_meta_tmpl,
3598 13581781 : ulong now ) {
3599 :
3600 13581781 : uint closing = 0U;
3601 13581781 : switch( conn->state ) {
3602 12000 : case FD_QUIC_CONN_STATE_PEER_CLOSE:
3603 12084 : case FD_QUIC_CONN_STATE_ABORT:
3604 18108 : case FD_QUIC_CONN_STATE_CLOSE_PENDING:
3605 18108 : closing = 1u;
3606 13581781 : }
3607 :
3608 13581781 : fd_quic_pkt_meta_tracker_t * tracker = &conn->pkt_meta_tracker;
3609 :
3610 13581781 : payload_ptr = fd_quic_gen_ack_frames( conn->ack_gen, payload_ptr, payload_end, pkt_meta_tmpl->enc_level, now, (float)conn->quic->config.tick_per_us );
3611 13581781 : if( conn->ack_gen->head == conn->ack_gen->tail ) conn->unacked_sz = 0UL;
3612 :
3613 13581781 : if( FD_UNLIKELY( closing ) ) {
3614 18108 : payload_ptr += fd_quic_gen_close_frame( conn, payload_ptr, payload_end, pkt_meta_tmpl, tracker );
3615 13563673 : } else {
3616 13563673 : payload_ptr = fd_quic_gen_handshake_frames( conn, payload_ptr, payload_end, pkt_meta_tmpl, tracker );
3617 13563673 : if( pkt_meta_tmpl->enc_level == fd_quic_enc_level_appdata_id ) {
3618 13539586 : payload_ptr += fd_quic_gen_handshake_done_frame( conn, payload_ptr, payload_end, pkt_meta_tmpl, tracker );
3619 13539586 : if( conn->upd_pkt_number >= pkt_meta_tmpl->key.pkt_num ) {
3620 12177 : payload_ptr += fd_quic_gen_max_data_frame ( conn, payload_ptr, payload_end, pkt_meta_tmpl, tracker );
3621 12177 : payload_ptr += fd_quic_gen_max_streams_frame( conn, payload_ptr, payload_end, pkt_meta_tmpl, tracker );
3622 12177 : payload_ptr += fd_quic_gen_ping_frame ( conn, payload_ptr, payload_end, pkt_meta_tmpl, tracker );
3623 12177 : }
3624 13539586 : if( FD_LIKELY( !conn->tls_hs ) ) {
3625 13533565 : payload_ptr = fd_quic_gen_stream_frames( conn, payload_ptr, payload_end, pkt_meta_tmpl, tracker );
3626 13533565 : }
3627 13539586 : }
3628 13563673 : }
3629 :
3630 13581781 : return payload_ptr;
3631 13581781 : }
3632 :
3633 : /* transmit
3634 : looks at each of the following dependent on state, and creates
3635 : a packet to transmit:
3636 : acks
3637 : handshake data (tls)
3638 : handshake done
3639 : ping
3640 : stream data */
3641 : static void
3642 : fd_quic_conn_tx( fd_quic_t * quic,
3643 13552975 : fd_quic_conn_t * conn ) {
3644 :
3645 13552975 : if( FD_UNLIKELY( conn->state == FD_QUIC_CONN_STATE_DEAD ) ) return;
3646 :
3647 13552975 : fd_quic_state_t * state = fd_quic_get_state( quic );
3648 :
3649 : /* used for encoding frames into before encrypting */
3650 13552975 : uchar * crypt_scratch = state->crypt_scratch;
3651 13552975 : ulong crypt_scratch_sz = sizeof( state->crypt_scratch );
3652 :
3653 : /* max packet size */
3654 : /* TODO probably should be called tx_max_udp_payload_sz */
3655 13552975 : ulong tx_max_datagram_sz = conn->tx_max_datagram_sz;
3656 :
3657 13552975 : if( conn->tx_ptr != conn->tx_buf_conn ) {
3658 0 : fd_quic_tx_buffered( quic, conn );
3659 0 : fd_quic_svc_schedule( state, conn, FD_QUIC_SVC_INSTANT );
3660 0 : return;
3661 0 : }
3662 :
3663 : /* choose enc_level to tx at */
3664 : /* this function accepts an argument "acks"
3665 : * We want to minimize the number of packets that carry only acks.
3666 : * fd_quic_tx_enc_level determines whether a packet needs sending,
3667 : * and when encryption level should be used.
3668 : * If "acks" is set to 1 (true), fd_quic_tx_enc_level checks for acks.
3669 : * Otherwise, it does not check for acks
3670 : * We set "acks" only on the first call in this function. All subsequent
3671 : * calls do not set it.
3672 : * This ensures that ack-only packets only occur when nothing else needs
3673 : * to be sent */
3674 13552975 : uint enc_level = fd_quic_tx_enc_level( conn, 1 /* acks */ );
3675 : /* RFC 9000 Section 17.2.2.1. Abandoning Initial Packets
3676 : > A client stops both sending and processing Initial packets when
3677 : > it sends its first Handshake packet. */
3678 13552975 : if( quic->config.role==FD_QUIC_ROLE_CLIENT && enc_level==fd_quic_enc_level_handshake_id ) {
3679 6021 : fd_quic_abandon_enc_level( conn, fd_quic_enc_level_initial_id );
3680 6021 : }
3681 :
3682 : /* nothing to send / bad state? */
3683 13552975 : if( enc_level == ~0u ) return;
3684 :
3685 13552975 : int key_phase_upd = (int)conn->key_update;
3686 13552975 : uint key_phase = conn->key_phase;
3687 13552975 : int key_phase_tx = (int)key_phase ^ key_phase_upd;
3688 :
3689 : /* get time, and set reschedule time for at most the idle timeout */
3690 13552975 : ulong now = fd_quic_get_state( quic )->now;
3691 :
3692 : /* initialize expiry and tx_time */
3693 13552975 : fd_quic_pkt_meta_t pkt_meta_tmpl[1] = {{.expiry = now+500000000UL, .tx_time = now}};
3694 : // pkt_meta_tmpl->expiry = fd_quic_calc_expiry( conn, now );
3695 : //ulong margin = (ulong)(conn->rtt->smoothed_rtt) + (ulong)(3 * conn->rtt->var_rtt);
3696 : //if( margin < pkt_meta->expiry ) {
3697 : // pkt_meta->expiry -= margin;
3698 : //}
3699 :
3700 27128699 : while( enc_level != ~0u ) {
3701 13581781 : uint initial_pkt = 0; /* is this the first initial packet? */
3702 :
3703 :
3704 : /* remaining in datagram */
3705 : /* invariant: tx_ptr >= tx_buf */
3706 13581781 : ulong datagram_rem = tx_max_datagram_sz - (ulong)( conn->tx_ptr - conn->tx_buf_conn );
3707 :
3708 : /* encode into here */
3709 : /* this is the start of a new quic packet
3710 : cur_ptr points at the next byte to fill with a quic pkt */
3711 : /* currently, cur_ptr just points at the start of crypt_scratch
3712 : each quic packet gets encrypted into tx_buf, and the space in
3713 : crypt_scratch is reused */
3714 13581781 : uchar * cur_ptr = crypt_scratch;
3715 13581781 : ulong cur_sz = crypt_scratch_sz;
3716 :
3717 : /* TODO determine actual datagrams size to use */
3718 13581781 : cur_sz = fd_ulong_min( cur_sz, datagram_rem );
3719 :
3720 : /* determine pn_space */
3721 13581781 : uint pn_space = fd_quic_enc_level_to_pn_space( enc_level );
3722 13581781 : pkt_meta_tmpl->pn_space = (uchar)pn_space;
3723 13581781 : pkt_meta_tmpl->enc_level = (uchar)(enc_level&0x3);
3724 :
3725 : /* get next packet number
3726 : Returned to pool if not sent as gaps are harmful for ACK frame
3727 : compression. */
3728 13581781 : ulong pkt_number = conn->pkt_number[pn_space];
3729 13581781 : FD_QUIC_PKT_META_SET_PKT_NUM( pkt_meta_tmpl, pkt_number );
3730 :
3731 : /* are we the client initial packet? */
3732 13581781 : ulong hs_data_offset = conn->hs_sent_bytes[enc_level];
3733 13581781 : initial_pkt = (uint)( hs_data_offset == 0 ) & (uint)( !conn->server ) & (uint)( enc_level == fd_quic_enc_level_initial_id );
3734 :
3735 : /* current peer endpoint */
3736 13581781 : fd_quic_conn_id_t const * peer_conn_id = &conn->peer_cids[0];
3737 :
3738 : /* our current conn_id */
3739 13581781 : ulong conn_id = conn->our_conn_id;
3740 13581781 : uint const pkt_num_len = 4u; /* 4-byte packet number */
3741 13581781 : uint const pkt_num_len_enc = pkt_num_len - 1; /* -1 offset for protocol */
3742 :
3743 :
3744 : /* encode packet header (including packet number)
3745 : While encoding, remember where the 'length' field is, if one
3746 : exists. We'll have to update it later. */
3747 13581781 : uchar * hdr_ptr = cur_ptr;
3748 13581781 : ulong hdr_sz = 0UL;
3749 13581781 : uchar _hdr_len_field[2]; /* if no len field exists, catch the write here */
3750 13581781 : uchar * hdr_len_field = _hdr_len_field;
3751 13581781 : switch( enc_level ) {
3752 12129 : case fd_quic_enc_level_initial_id: {
3753 12129 : fd_quic_initial_t initial = {0};
3754 12129 : initial.h0 = fd_quic_initial_h0( pkt_num_len_enc );
3755 12129 : initial.version = 1;
3756 12129 : initial.dst_conn_id_len = peer_conn_id->sz;
3757 : // .dst_conn_id
3758 12129 : initial.src_conn_id_len = FD_QUIC_CONN_ID_SZ;
3759 : // .src_conn_id
3760 : // .token - below
3761 12129 : initial.len = 0x3fff; /* use 2 byte varint encoding */
3762 12129 : initial.pkt_num = pkt_number;
3763 :
3764 12129 : fd_memcpy( initial.dst_conn_id, peer_conn_id->conn_id, peer_conn_id->sz );
3765 12129 : memcpy( initial.src_conn_id, &conn_id, FD_QUIC_CONN_ID_SZ );
3766 :
3767 : /* Initial packets sent by the server MUST set the Token Length field to 0. */
3768 12129 : initial.token = conn->token;
3769 12129 : if( conn->quic->config.role == FD_QUIC_ROLE_CLIENT && conn->token_len ) {
3770 3 : initial.token_len = conn->token_len;
3771 12126 : } else {
3772 12126 : initial.token_len = 0;
3773 12126 : }
3774 :
3775 12129 : hdr_sz = fd_quic_encode_initial( cur_ptr, cur_sz, &initial );
3776 12129 : hdr_len_field = cur_ptr + hdr_sz - 6; /* 2 byte len, 4 byte packet number */
3777 12129 : FD_DTRACE_PROBE_2( quic_encode_initial, initial.src_conn_id, initial.dst_conn_id );
3778 12129 : break;
3779 0 : }
3780 :
3781 12042 : case fd_quic_enc_level_handshake_id: {
3782 12042 : fd_quic_handshake_t handshake = {0};
3783 12042 : handshake.h0 = fd_quic_handshake_h0( pkt_num_len_enc );
3784 12042 : handshake.version = 1;
3785 :
3786 : /* destination */
3787 12042 : fd_memcpy( handshake.dst_conn_id, peer_conn_id->conn_id, peer_conn_id->sz );
3788 12042 : handshake.dst_conn_id_len = peer_conn_id->sz;
3789 :
3790 : /* source */
3791 12042 : FD_STORE( ulong, handshake.src_conn_id, conn_id );
3792 12042 : handshake.src_conn_id_len = sizeof(ulong);
3793 :
3794 12042 : handshake.len = 0x3fff; /* use 2 byte varint encoding */
3795 12042 : handshake.pkt_num = pkt_number;
3796 :
3797 12042 : hdr_sz = fd_quic_encode_handshake( cur_ptr, cur_sz, &handshake );
3798 12042 : hdr_len_field = cur_ptr + hdr_sz - 6; /* 2 byte len, 4 byte packet number */
3799 12042 : FD_DTRACE_PROBE_2( quic_encode_handshake, handshake.src_conn_id, handshake.dst_conn_id );
3800 12042 : break;
3801 0 : }
3802 :
3803 13557610 : case fd_quic_enc_level_appdata_id:
3804 13557610 : {
3805 13557610 : fd_quic_one_rtt_t one_rtt = {0};
3806 13557610 : one_rtt.h0 = fd_quic_one_rtt_h0( /* spin */ 0, !!key_phase_tx, pkt_num_len_enc );
3807 :
3808 : /* destination */
3809 13557610 : fd_memcpy( one_rtt.dst_conn_id, peer_conn_id->conn_id, peer_conn_id->sz );
3810 13557610 : one_rtt.dst_conn_id_len = peer_conn_id->sz;
3811 :
3812 13557610 : one_rtt.pkt_num = pkt_number;
3813 :
3814 13557610 : hdr_sz = fd_quic_encode_one_rtt( cur_ptr, cur_sz, &one_rtt );
3815 13557610 : FD_DTRACE_PROBE_2( quic_encode_one_rtt, one_rtt.dst_conn_id, one_rtt.pkt_num );
3816 13557610 : break;
3817 0 : }
3818 :
3819 0 : default:
3820 0 : FD_LOG_ERR(( "%s - logic error: unexpected enc_level", __func__ ));
3821 13581781 : }
3822 :
3823 : /* if we don't have reasonable amt of space for a new packet, tx to free space */
3824 13581781 : const ulong min_rqd = 64;
3825 13581781 : if( FD_UNLIKELY( hdr_sz==FD_QUIC_ENCODE_FAIL || hdr_sz + min_rqd > cur_sz ) ) {
3826 : /* try to free space */
3827 0 : fd_quic_tx_buffered( quic, conn );
3828 :
3829 : /* we have lots of space, so try again */
3830 0 : if( conn->tx_buf_conn == conn->tx_ptr ) {
3831 0 : enc_level = fd_quic_tx_enc_level( conn, 0 /* acks */ );
3832 0 : continue;
3833 0 : }
3834 :
3835 : /* reschedule, since some data was unable to be sent */
3836 : /* TODO might want to add a backoff here */
3837 0 : fd_quic_svc_schedule( state, conn, FD_QUIC_SVC_INSTANT );
3838 :
3839 0 : break;
3840 0 : }
3841 :
3842 13581781 : cur_ptr += hdr_sz;
3843 13581781 : cur_sz -= hdr_sz;
3844 :
3845 : /* start writing payload, leaving room for header and expansion
3846 : due to varint coding */
3847 :
3848 13581781 : uchar * payload_ptr = cur_ptr;
3849 13581781 : ulong payload_sz = cur_sz;
3850 : /* payload_end leaves room for TAG */
3851 13581781 : uchar * payload_end = payload_ptr + payload_sz - FD_QUIC_CRYPTO_TAG_SZ;
3852 :
3853 13581781 : uchar * const frame_start = payload_ptr;
3854 13581781 : payload_ptr = fd_quic_gen_frames( conn, frame_start, payload_end, pkt_meta_tmpl, now );
3855 13581781 : if( FD_UNLIKELY( payload_ptr < frame_start ) ) FD_LOG_CRIT(( "fd_quic_gen_frames failed" ));
3856 :
3857 : /* did we add any frames? */
3858 :
3859 13581781 : if( payload_ptr==frame_start ) {
3860 : /* we have data to add, but none was added, presumably due
3861 : so space in the datagram */
3862 6057 : ulong free_bytes = (ulong)( payload_ptr - payload_end );
3863 : /* sanity check */
3864 6057 : if( free_bytes > 64 ) {
3865 : /* we should have been able to fit data into 64 bytes
3866 : so stop trying here */
3867 6057 : break;
3868 6057 : }
3869 :
3870 : /* try to free space */
3871 0 : fd_quic_tx_buffered( quic, conn );
3872 :
3873 : /* we have lots of space, so try again */
3874 0 : if( conn->tx_buf_conn == conn->tx_ptr ) {
3875 0 : enc_level = fd_quic_tx_enc_level( conn, 0 /* acks */ );
3876 0 : continue;
3877 0 : }
3878 0 : }
3879 :
3880 : /* first initial frame is padded to FD_QUIC_INITIAL_PAYLOAD_SZ_MIN
3881 : all short quic packets are padded so 16 bytes of sample are available */
3882 13575724 : uint tot_frame_sz = (uint)( payload_ptr - frame_start );
3883 13575724 : uint base_pkt_len = (uint)tot_frame_sz + pkt_num_len + FD_QUIC_CRYPTO_TAG_SZ;
3884 13575724 : uint padding = initial_pkt ? FD_QUIC_INITIAL_PAYLOAD_SZ_MIN - base_pkt_len : 0u;
3885 :
3886 13575724 : if( base_pkt_len + padding < FD_QUIC_CRYPTO_SAMPLE_OFFSET_FROM_PKT_NUM_START + FD_QUIC_CRYPTO_SAMPLE_SZ ) {
3887 0 : padding = FD_QUIC_CRYPTO_SAMPLE_SZ + FD_QUIC_CRYPTO_SAMPLE_OFFSET_FROM_PKT_NUM_START - base_pkt_len;
3888 0 : }
3889 :
3890 : /* this length includes the packet number length (pkt_number_len_enc+1),
3891 : padding and the final TAG */
3892 13575724 : uint quic_pkt_len = base_pkt_len + padding;
3893 :
3894 : /* set the length on the packet header */
3895 13575724 : uint quic_pkt_len_varint = 0x4000u | fd_uint_min( quic_pkt_len, 0x3fff );
3896 13575724 : FD_STORE( ushort, hdr_len_field, fd_ushort_bswap( (ushort)quic_pkt_len_varint ) );
3897 :
3898 : /* add padding */
3899 13575724 : if( padding ) {
3900 6024 : fd_memset( payload_ptr, 0, padding );
3901 6024 : payload_ptr += padding;
3902 6024 : }
3903 :
3904 : /* everything successful up to here
3905 : encrypt into tx_ptr,tx_ptr+tx_sz */
3906 :
3907 : #if FD_QUIC_DISABLE_CRYPTO
3908 : ulong quic_pkt_sz = hdr_sz + tot_frame_sz + padding;
3909 : fd_memcpy( conn->tx_ptr, hdr_ptr, quic_pkt_sz );
3910 : conn->tx_ptr += quic_pkt_sz;
3911 :
3912 : /* append MAC tag */
3913 : memset( conn->tx_ptr, 0, FD_QUIC_CRYPTO_TAG_SZ );
3914 : conn->tx_ptr += FD_QUIC_CRYPTO_TAG_SZ;
3915 : #else
3916 13575724 : ulong cipher_text_sz = fd_quic_conn_tx_buf_remaining( conn );
3917 13575724 : ulong frames_sz = (ulong)( payload_ptr - frame_start ); /* including padding */
3918 :
3919 13575724 : fd_quic_crypto_keys_t * hp_keys = &conn->keys[enc_level][1];
3920 13575724 : fd_quic_crypto_keys_t * pkt_keys = key_phase_upd ? &conn->new_keys[1] : &conn->keys[enc_level][1];
3921 :
3922 13575724 : if( FD_UNLIKELY( fd_quic_crypto_encrypt( conn->tx_ptr, &cipher_text_sz, hdr_ptr, hdr_sz,
3923 13575724 : frame_start, frames_sz, pkt_keys, hp_keys, pkt_number ) != FD_QUIC_SUCCESS ) ) {
3924 0 : FD_LOG_WARNING(( "fd_quic_crypto_encrypt failed" ));
3925 :
3926 : /* this situation is unlikely to improve, so kill the connection */
3927 0 : conn->state = FD_QUIC_CONN_STATE_DEAD;
3928 0 : fd_quic_svc_schedule( state, conn, FD_QUIC_SVC_INSTANT );
3929 0 : quic->metrics.conn_aborted_cnt++;
3930 0 : break;
3931 0 : }
3932 :
3933 13575724 : conn->tx_ptr += cipher_text_sz;
3934 13575724 : #endif
3935 :
3936 : /* we have committed the packet into the buffer, so inc pkt_number */
3937 13575724 : conn->pkt_number[pn_space]++;
3938 :
3939 13575724 : fd_quic_svc_schedule( state, conn, FD_QUIC_SVC_WAIT );
3940 :
3941 13575724 : if( enc_level == fd_quic_enc_level_appdata_id ) {
3942 : /* short header must be last in datagram
3943 : so send in packet immediately */
3944 13551553 : fd_quic_tx_buffered( quic, conn );
3945 :
3946 13551553 : if( conn->tx_ptr == conn->tx_buf_conn ) {
3947 13551553 : enc_level = fd_quic_tx_enc_level( conn, 0 /* acks */ );
3948 13551553 : continue;
3949 13551553 : }
3950 :
3951 : /* TODO count here */
3952 :
3953 : /* drop packet */
3954 : /* this is a workaround for leaving a short=header-packet in the buffer
3955 : for the next tx_conn call. Next time around the tx_conn call will
3956 : not be aware that the buffer cannot be added to */
3957 0 : conn->tx_ptr = conn->tx_buf_conn;
3958 :
3959 0 : break;
3960 13551553 : }
3961 :
3962 : /* Refresh enc_level in case we can coalesce another packet */
3963 24171 : enc_level = fd_quic_tx_enc_level( conn, 0 /* acks */ );
3964 24171 : FD_DEBUG( if( enc_level!=~0u) FD_LOG_DEBUG(( "Attempting to append enc_level=%u packet", enc_level )); )
3965 24171 : }
3966 :
3967 : /* try to send? */
3968 13552975 : fd_quic_tx_buffered( quic, conn );
3969 13552975 : }
3970 :
3971 : void
3972 13552975 : fd_quic_conn_service( fd_quic_t * quic, fd_quic_conn_t * conn, ulong now ) {
3973 13552975 : (void)now;
3974 :
3975 : /* Send new rtt measurement probe? */
3976 13552975 : if( FD_UNLIKELY(now > conn->last_ack + (ulong)conn->rtt_period_ticks) ) {
3977 : /* send PING */
3978 18 : if( !( conn->flags & ( FD_QUIC_CONN_FLAGS_PING | FD_QUIC_CONN_FLAGS_PING_SENT ) )
3979 18 : && conn->state == FD_QUIC_CONN_STATE_ACTIVE ) {
3980 0 : conn->flags |= FD_QUIC_CONN_FLAGS_PING;
3981 0 : conn->upd_pkt_number = FD_QUIC_PKT_NUM_PENDING; /* update to be sent in next packet */
3982 0 : }
3983 18 : }
3984 :
3985 : /* handle expiry on pkt_meta */
3986 13552975 : fd_quic_pkt_meta_retry( quic, conn, 0 /* don't force */, ~0u /* enc_level */ );
3987 :
3988 : /* check state
3989 : need reset?
3990 : need close?
3991 : need acks?
3992 : replies?
3993 : data to send?
3994 : dead */
3995 13552975 : switch( conn->state ) {
3996 12045 : case FD_QUIC_CONN_STATE_HANDSHAKE:
3997 24087 : case FD_QUIC_CONN_STATE_HANDSHAKE_COMPLETE:
3998 24087 : {
3999 24087 : if( conn->tls_hs ) {
4000 : /* if we're the server, we send "handshake-done" frame */
4001 24087 : if( conn->state == FD_QUIC_CONN_STATE_HANDSHAKE_COMPLETE && conn->server ) {
4002 6021 : conn->handshake_done_send = 1;
4003 :
4004 : /* move straight to ACTIVE */
4005 6021 : fd_quic_set_conn_state( conn, FD_QUIC_CONN_STATE_ACTIVE );
4006 :
4007 : /* RFC 9001 4.9.2. Discarding Handshake Keys
4008 : > An endpoint MUST discard its Handshake keys when the
4009 : > TLS handshake is confirmed
4010 : RFC 9001 4.1.2. Handshake Confirmed
4011 : > [...] the TLS handshake is considered confirmed at the
4012 : > server when the handshake completes */
4013 6021 : fd_quic_abandon_enc_level( conn, fd_quic_enc_level_handshake_id );
4014 :
4015 : /* user callback */
4016 6021 : fd_quic_cb_conn_new( quic, conn );
4017 :
4018 : /* clear out hs_data here, as we don't need it anymore */
4019 6021 : fd_quic_tls_hs_data_t * hs_data = NULL;
4020 :
4021 6021 : uint enc_level = (uint)fd_quic_enc_level_appdata_id;
4022 6021 : hs_data = fd_quic_tls_get_hs_data( conn->tls_hs, enc_level );
4023 6021 : while( hs_data ) {
4024 0 : fd_quic_tls_pop_hs_data( conn->tls_hs, enc_level );
4025 0 : hs_data = fd_quic_tls_get_hs_data( conn->tls_hs, enc_level );
4026 0 : }
4027 6021 : }
4028 :
4029 : /* if we're the client, fd_quic_conn_tx will flush the hs
4030 : buffer so we can receive the HANDSHAKE_DONE frame, and
4031 : transition from CONN_STATE HANDSHAKE_COMPLETE to ACTIVE. */
4032 24087 : }
4033 :
4034 : /* do we have data to transmit? */
4035 24087 : fd_quic_conn_tx( quic, conn );
4036 :
4037 24087 : break;
4038 12045 : }
4039 :
4040 6024 : case FD_QUIC_CONN_STATE_CLOSE_PENDING:
4041 12024 : case FD_QUIC_CONN_STATE_PEER_CLOSE:
4042 : /* user requested close, and may have set a reason code */
4043 : /* transmit the failure reason */
4044 12024 : fd_quic_conn_tx( quic, conn );
4045 :
4046 : /* schedule another fd_quic_conn_service to free the conn */
4047 12024 : fd_quic_set_conn_state( conn, FD_QUIC_CONN_STATE_DEAD ); /* TODO need draining state wait for 3 * TPO */
4048 12024 : quic->metrics.conn_closed_cnt++;
4049 12024 : fd_quic_svc_schedule1( conn, FD_QUIC_SVC_INSTANT );
4050 :
4051 12024 : break;
4052 :
4053 84 : case FD_QUIC_CONN_STATE_ABORT:
4054 : /* transmit the failure reason */
4055 84 : fd_quic_conn_tx( quic, conn );
4056 :
4057 : /* schedule another fd_quic_conn_service to free the conn */
4058 84 : fd_quic_set_conn_state( conn, FD_QUIC_CONN_STATE_DEAD );
4059 84 : quic->metrics.conn_aborted_cnt++;
4060 84 : fd_quic_svc_schedule1( conn, FD_QUIC_SVC_INSTANT );
4061 :
4062 84 : break;
4063 :
4064 13516780 : case FD_QUIC_CONN_STATE_ACTIVE:
4065 : /* do we have data to transmit? */
4066 13516780 : fd_quic_conn_tx( quic, conn );
4067 :
4068 13516780 : break;
4069 :
4070 0 : case FD_QUIC_CONN_STATE_DEAD:
4071 0 : case FD_QUIC_CONN_STATE_INVALID:
4072 : /* fall thru */
4073 0 : default:
4074 0 : return;
4075 13552975 : }
4076 :
4077 : /* check routing and arp for this connection */
4078 :
4079 13552975 : }
4080 :
4081 : void
4082 : fd_quic_conn_free( fd_quic_t * quic,
4083 14259 : fd_quic_conn_t * conn ) {
4084 14259 : if( FD_UNLIKELY( !conn ) ) {
4085 0 : FD_LOG_WARNING(( "NULL conn" ));
4086 0 : return;
4087 0 : }
4088 14259 : if( FD_UNLIKELY( conn->state == FD_QUIC_CONN_STATE_INVALID ) ) {
4089 0 : FD_LOG_CRIT(( "double free detected" ));
4090 0 : return;
4091 0 : }
4092 :
4093 14259 : FD_COMPILER_MFENCE();
4094 14259 : fd_quic_set_conn_state( conn, FD_QUIC_CONN_STATE_INVALID );
4095 14259 : FD_COMPILER_MFENCE();
4096 :
4097 14259 : fd_quic_state_t * state = fd_quic_get_state( quic );
4098 :
4099 : /* no need to remove this connection from the events queue
4100 : free is called from two places:
4101 : fini - service will never be called again. All events are destroyed
4102 : service - removes event before calling free. Event only allowed to be
4103 : enqueued once */
4104 :
4105 : /* remove all stream ids from map, and free stream */
4106 :
4107 : /* remove used streams */
4108 14259 : fd_quic_stream_t * used_sentinel = conn->used_streams;
4109 20353 : while( 1 ) {
4110 20353 : fd_quic_stream_t * stream = used_sentinel->next;
4111 :
4112 20353 : if( FD_UNLIKELY( stream == used_sentinel ) ) break;
4113 :
4114 6094 : fd_quic_tx_stream_free( quic, conn, stream, FD_QUIC_STREAM_NOTIFY_CONN );
4115 6094 : }
4116 :
4117 : /* remove send streams */
4118 14259 : fd_quic_stream_t * send_sentinel = conn->send_streams;
4119 20271 : while( 1 ) {
4120 20271 : fd_quic_stream_t * stream = send_sentinel->next;
4121 :
4122 20271 : if( FD_UNLIKELY( stream == send_sentinel ) ) break;
4123 :
4124 6012 : fd_quic_tx_stream_free( quic, conn, stream, FD_QUIC_STREAM_NOTIFY_CONN );
4125 6012 : }
4126 :
4127 : /* if any stream map entries are left over, remove them
4128 : this should not occur, so this branch should not execute
4129 : but if a stream doesn't get cleaned up properly, this fixes
4130 : the stream map */
4131 14259 : if( FD_UNLIKELY( conn->stream_map && fd_quic_stream_map_key_cnt( conn->stream_map ) > 0 ) ) {
4132 0 : FD_LOG_WARNING(( "stream_map not empty. cnt: %lu",
4133 0 : (ulong)fd_quic_stream_map_key_cnt( conn->stream_map ) ));
4134 0 : while( fd_quic_stream_map_key_cnt( conn->stream_map ) > 0 ) {
4135 0 : int removed = 0;
4136 0 : for( ulong j = 0; j < fd_quic_stream_map_slot_cnt( conn->stream_map ); ++j ) {
4137 0 : if( conn->stream_map[j].stream_id != FD_QUIC_STREAM_ID_UNUSED ) {
4138 0 : fd_quic_stream_map_remove( conn->stream_map, &conn->stream_map[j] );
4139 0 : removed = 1;
4140 0 : j--; /* retry this entry */
4141 0 : }
4142 0 : }
4143 0 : if( !removed ) {
4144 0 : FD_LOG_WARNING(( "None removed. Remain: %lu",
4145 0 : (ulong)fd_quic_stream_map_key_cnt( conn->stream_map ) ));
4146 0 : break;
4147 0 : }
4148 0 : }
4149 0 : }
4150 :
4151 14259 : if( conn->tls_hs ) {
4152 : /* free tls-hs */
4153 117 : fd_quic_tls_hs_delete( conn->tls_hs );
4154 :
4155 : /* Remove the handshake from the cache before releasing it */
4156 117 : fd_quic_tls_hs_cache_ele_remove( &state->hs_cache, conn->tls_hs, state->hs_pool);
4157 117 : fd_quic_tls_hs_pool_ele_release( state->hs_pool, conn->tls_hs );
4158 117 : }
4159 14259 : conn->tls_hs = NULL;
4160 :
4161 : /* remove connection from service queue */
4162 14259 : if( FD_LIKELY( conn->svc_type != UINT_MAX ) ) {
4163 12165 : fd_quic_svc_unqueue( state, conn );
4164 12165 : }
4165 :
4166 : /* put connection back in free list */
4167 14259 : conn->svc_type = UINT_MAX;
4168 14259 : conn->svc_prev = UINT_MAX;
4169 14259 : conn->svc_next = state->free_conn_list;
4170 14259 : state->free_conn_list = conn->conn_idx;
4171 14259 : fd_quic_set_conn_state( conn, FD_QUIC_CONN_STATE_INVALID );
4172 :
4173 14259 : quic->metrics.conn_active_cnt--;
4174 :
4175 : /* clear keys */
4176 14259 : memset( &conn->secrets, 0, sizeof(fd_quic_crypto_secrets_t) );
4177 14259 : memset( conn->keys, 0, sizeof( conn->keys ) );
4178 14259 : memset( conn->new_keys, 0, sizeof( conn->new_keys ) );
4179 14259 : }
4180 :
4181 : fd_quic_conn_t *
4182 : fd_quic_connect( fd_quic_t * quic,
4183 : uint dst_ip_addr,
4184 : ushort dst_udp_port,
4185 : uint src_ip_addr,
4186 6057 : ushort src_udp_port ) {
4187 :
4188 6057 : fd_quic_state_t * state = fd_quic_get_state( quic );
4189 6057 : state->now = fd_quic_now( quic );
4190 :
4191 6057 : if( FD_UNLIKELY( !fd_quic_tls_hs_pool_free( state->hs_pool ) ) ) {
4192 : /* try evicting, 0 if oldest is too young so fail */
4193 6 : if( !fd_quic_tls_hs_cache_evict( quic, state ) ) {
4194 3 : return NULL;
4195 3 : }
4196 6 : }
4197 :
4198 :
4199 6054 : fd_rng_t * rng = state->_rng;
4200 :
4201 : /* create conn ids for us and them
4202 : client creates connection id for the peer, peer immediately replaces it */
4203 6054 : ulong our_conn_id_u64 = fd_rng_ulong( rng );
4204 6054 : fd_quic_conn_id_t peer_conn_id; fd_quic_conn_id_rand( &peer_conn_id, rng );
4205 :
4206 6054 : fd_quic_conn_t * conn = fd_quic_conn_create(
4207 6054 : quic,
4208 6054 : our_conn_id_u64,
4209 6054 : &peer_conn_id,
4210 6054 : dst_ip_addr,
4211 6054 : dst_udp_port,
4212 6054 : src_ip_addr,
4213 6054 : src_udp_port,
4214 6054 : 0 /* client */ );
4215 :
4216 6054 : if( FD_UNLIKELY( !conn ) ) {
4217 0 : FD_DEBUG( FD_LOG_DEBUG(( "fd_quic_conn_create failed" )) );
4218 0 : return NULL;
4219 0 : }
4220 :
4221 : /* Prepare QUIC-TLS transport params object (sent as a TLS extension).
4222 : Take template from state and mutate certain params in-place.
4223 :
4224 : See RFC 9000 Section 18 */
4225 :
4226 6054 : fd_quic_transport_params_t tp[1] = { state->transport_params };
4227 :
4228 : /* The original_destination_connection_id is omitted by clients.
4229 : Since this is a mutable field, explicitly clear it here. */
4230 :
4231 6054 : tp->original_destination_connection_id_present = 0;
4232 6054 : tp->original_destination_connection_id_len = 0;
4233 :
4234 : /* Similarly, explicitly zero out retry fields. */
4235 6054 : tp->retry_source_connection_id_present = 0;
4236 6054 : tp->retry_source_connection_id_len = 0;
4237 :
4238 : /* Repeat source conn ID -- rationale see fd_quic_handle_v1_initial */
4239 :
4240 6054 : FD_STORE( ulong, tp->initial_source_connection_id, conn->initial_source_conn_id );
4241 6054 : tp->initial_source_connection_id_present = 1;
4242 6054 : tp->initial_source_connection_id_len = FD_QUIC_CONN_ID_SZ;
4243 :
4244 : /* Create a TLS handshake (free>0 validated above) */
4245 :
4246 6054 : fd_quic_tls_hs_t * tls_hs = fd_quic_tls_hs_new(
4247 6054 : fd_quic_tls_hs_pool_ele_acquire( state->hs_pool ),
4248 6054 : state->tls,
4249 6054 : (void*)conn,
4250 6054 : 0 /*is_server*/,
4251 6054 : tp,
4252 6054 : state->now );
4253 6054 : if( FD_UNLIKELY( tls_hs->alert ) ) {
4254 0 : FD_LOG_WARNING(( "fd_quic_tls_hs_client_new failed" ));
4255 : /* shut down tls_hs */
4256 0 : fd_quic_conn_free( quic, conn );
4257 0 : return NULL;
4258 0 : }
4259 6054 : fd_quic_tls_hs_cache_ele_push_tail( &state->hs_cache, tls_hs, state->hs_pool );
4260 :
4261 6054 : quic->metrics.hs_created_cnt++;
4262 6054 : conn->tls_hs = tls_hs;
4263 :
4264 6054 : fd_quic_gen_initial_secret_and_keys( conn, &peer_conn_id, /* is_server */ 0 );
4265 :
4266 6054 : fd_quic_svc_schedule( state, conn, FD_QUIC_SVC_INSTANT );
4267 :
4268 : /* set "called_conn_new" to indicate we should call conn_final
4269 : upon teardown */
4270 6054 : conn->called_conn_new = 1;
4271 :
4272 : /* everything initialized */
4273 6054 : return conn;
4274 :
4275 6054 : }
4276 :
4277 : fd_quic_conn_t *
4278 : fd_quic_conn_create( fd_quic_t * quic,
4279 : ulong our_conn_id,
4280 : fd_quic_conn_id_t const * peer_conn_id,
4281 : uint peer_ip_addr,
4282 : ushort peer_udp_port,
4283 : uint self_ip_addr,
4284 : ushort self_udp_port,
4285 314307 : int server ) {
4286 314307 : if( FD_UNLIKELY( !our_conn_id ) ) return NULL;
4287 :
4288 314307 : fd_quic_config_t * config = &quic->config;
4289 314307 : fd_quic_state_t * state = fd_quic_get_state( quic );
4290 :
4291 : /* fetch top of connection free list */
4292 314307 : uint conn_idx = state->free_conn_list;
4293 314307 : if( FD_UNLIKELY( conn_idx==UINT_MAX ) ) {
4294 0 : FD_DEBUG( FD_LOG_DEBUG(( "fd_quic_conn_create failed: no free conn slots" )) );
4295 0 : quic->metrics.conn_err_no_slots_cnt++;
4296 0 : return NULL;
4297 0 : }
4298 314307 : if( FD_UNLIKELY( conn_idx >= quic->limits.conn_cnt ) ) {
4299 0 : FD_LOG_ERR(( "Conn free list corruption detected" ));
4300 0 : return NULL;
4301 0 : }
4302 314307 : fd_quic_conn_t * conn = fd_quic_conn_at_idx( state, conn_idx );
4303 314307 : if( FD_UNLIKELY( conn->state != FD_QUIC_CONN_STATE_INVALID ) ) {
4304 0 : FD_LOG_ERR(( "conn %p not free, this is a bug", (void *)conn ));
4305 0 : return NULL;
4306 0 : }
4307 :
4308 : /* prune previous conn map entry */
4309 314307 : fd_quic_conn_map_t * entry = fd_quic_conn_query1( state->conn_map, conn->our_conn_id, NULL );
4310 314307 : if( entry ) fd_quic_conn_map_remove( state->conn_map, entry );
4311 :
4312 : /* insert into conn map */
4313 314307 : fd_quic_conn_map_t * insert_entry = fd_quic_conn_map_insert( state->conn_map, our_conn_id );
4314 :
4315 : /* if insert failed (should be impossible) fail, and do not remove connection
4316 : from free list */
4317 314307 : if( FD_UNLIKELY( insert_entry == NULL ) ) {
4318 : /* FIXME This has ~1e-6 probability of happening with 10M conns
4319 : Retry generating our_conn_id instead of logging a warning */
4320 0 : FD_LOG_WARNING(( "fd_quic_conn_create failed: failed to register new conn ID" ));
4321 0 : return NULL;
4322 0 : }
4323 :
4324 : /* set connection map insert_entry to new connection */
4325 314307 : insert_entry->conn = conn;
4326 :
4327 : /* remove from free list */
4328 314307 : state->free_conn_list = conn->svc_next;
4329 314307 : conn->svc_next = UINT_MAX;
4330 :
4331 : /* initialize connection members */
4332 314307 : conn->quic = quic;
4333 314307 : conn->server = !!server;
4334 314307 : conn->established = 0;
4335 314307 : conn->called_conn_new = 0;
4336 314307 : conn->svc_type = UINT_MAX;
4337 314307 : conn->svc_time = LONG_MAX;
4338 314307 : conn->our_conn_id = our_conn_id;
4339 314307 : conn->host = (fd_quic_net_endpoint_t){
4340 314307 : .ip_addr = self_ip_addr, /* may be 0, if outgoing */
4341 314307 : .udp_port = self_udp_port,
4342 314307 : };
4343 314307 : memset( &conn->peer[0], 0, sizeof( conn->peer ) );
4344 314307 : conn->conn_gen++;
4345 314307 : conn->token_len = 0;
4346 :
4347 : /* start with smallest value we allow, then allow peer to increase */
4348 314307 : conn->tx_max_datagram_sz = FD_QUIC_INITIAL_PAYLOAD_SZ_MAX;
4349 314307 : conn->handshake_complete = 0;
4350 314307 : conn->handshake_done_send = 0;
4351 314307 : conn->handshake_done_ackd = 0;
4352 314307 : conn->tls_hs = NULL; /* created later */
4353 :
4354 : /* initialize stream_id members */
4355 314307 : fd_quic_conn_stream_rx_t * srx = conn->srx;
4356 314307 : fd_quic_transport_params_t * our_tp = &state->transport_params;
4357 314307 : srx->rx_hi_stream_id = server ? FD_QUIC_STREAM_TYPE_UNI_CLIENT : FD_QUIC_STREAM_TYPE_UNI_SERVER;
4358 314307 : srx->rx_sup_stream_id = server ? FD_QUIC_STREAM_TYPE_UNI_CLIENT : FD_QUIC_STREAM_TYPE_UNI_SERVER;
4359 314307 : conn->tx_next_stream_id = server ? FD_QUIC_STREAM_TYPE_UNI_SERVER : FD_QUIC_STREAM_TYPE_UNI_CLIENT;
4360 314307 : conn->tx_sup_stream_id = server ? FD_QUIC_STREAM_TYPE_UNI_SERVER : FD_QUIC_STREAM_TYPE_UNI_CLIENT;
4361 :
4362 314307 : srx->rx_max_streams_unidir_ackd = 0;
4363 314307 : srx->rx_max_data = our_tp->initial_max_data;
4364 314307 : srx->rx_tot_data = 0;
4365 314307 : srx->rx_streams_active = 0L;
4366 :
4367 314307 : if( state->transport_params.initial_max_streams_uni_present ) {
4368 314307 : srx->rx_sup_stream_id = (state->transport_params.initial_max_streams_uni<<2) + FD_QUIC_STREAM_TYPE_UNI_CLIENT;
4369 314307 : }
4370 314307 : if( state->transport_params.initial_max_data ) {
4371 314307 : srx->rx_max_data = state->transport_params.initial_max_data;
4372 314307 : }
4373 :
4374 : /* points to free tx space */
4375 314307 : conn->tx_ptr = conn->tx_buf_conn;
4376 :
4377 314307 : conn->keys_avail = fd_uint_set_bit( 0U, fd_quic_enc_level_initial_id );
4378 :
4379 : /* rfc9000: s12.3:
4380 : Packet numbers in each packet space start at 0.
4381 : Subsequent packets sent in the same packet number space
4382 : MUST increase the packet number by at least 1
4383 : rfc9002: s3
4384 : It is permitted for some packet numbers to never be used, leaving intentional gaps. */
4385 314307 : memset( conn->exp_pkt_number, 0, sizeof( conn->exp_pkt_number ) );
4386 314307 : memset( conn->last_pkt_number, 0, sizeof( conn->last_pkt_number ) );
4387 314307 : memset( conn->pkt_number, 0, sizeof( conn->pkt_number ) );
4388 :
4389 314307 : memset( conn->hs_sent_bytes, 0, sizeof( conn->hs_sent_bytes ) );
4390 314307 : memset( conn->hs_ackd_bytes, 0, sizeof( conn->hs_ackd_bytes ) );
4391 :
4392 314307 : memset( &conn->secrets, 0, sizeof( conn->secrets ) );
4393 314307 : memset( &conn->keys, 0, sizeof( conn->keys ) );
4394 314307 : memset( &conn->new_keys, 0, sizeof( conn->new_keys ) );
4395 : /* suites initialized above */
4396 :
4397 314307 : conn->key_phase = 0;
4398 314307 : conn->key_update = 0;
4399 :
4400 314307 : fd_quic_set_conn_state( conn, FD_QUIC_CONN_STATE_HANDSHAKE );
4401 314307 : conn->reason = 0;
4402 314307 : conn->app_reason = 0;
4403 314307 : conn->flags = 0;
4404 314307 : conn->upd_pkt_number = 0;
4405 :
4406 : /* start with minimum supported max datagram */
4407 : /* peers may allow more */
4408 314307 : conn->tx_max_datagram_sz = FD_QUIC_INITIAL_PAYLOAD_SZ_MAX;
4409 :
4410 : /* initial source connection id */
4411 314307 : conn->initial_source_conn_id = our_conn_id;
4412 :
4413 : /* peer connection id */
4414 314307 : conn->peer_cids[0] = *peer_conn_id;
4415 314307 : conn->peer[0].ip_addr = peer_ip_addr;
4416 314307 : conn->peer[0].udp_port = peer_udp_port;
4417 :
4418 314307 : fd_quic_ack_gen_init( conn->ack_gen );
4419 314307 : conn->unacked_sz = 0UL;
4420 :
4421 : /* flow control params */
4422 314307 : conn->tx_max_data = 0;
4423 :
4424 : /* no stream bytes sent or received yet */
4425 314307 : conn->tx_tot_data = 0;
4426 :
4427 : /* initial rtt */
4428 : /* overridden when acks start returning */
4429 314307 : fd_rtt_estimate_t * rtt = conn->rtt;
4430 :
4431 314307 : ulong peer_ack_delay_exponent = 3UL; /* by spec, default is 3 */
4432 314307 : conn->peer_ack_delay_scale = (float)( 1UL << peer_ack_delay_exponent )
4433 314307 : * (float)quic->config.tick_per_us;
4434 314307 : conn->peer_max_ack_delay_ticks = 0.0f; /* starts at zero, since peers respond immediately to */
4435 : /* INITIAL and HANDSHAKE */
4436 : /* updated when we get transport parameters */
4437 314307 : rtt->smoothed_rtt = FD_QUIC_INITIAL_RTT_US * (float)quic->config.tick_per_us;
4438 314307 : rtt->latest_rtt = FD_QUIC_INITIAL_RTT_US * (float)quic->config.tick_per_us;
4439 314307 : rtt->min_rtt = FD_QUIC_INITIAL_RTT_US * (float)quic->config.tick_per_us;
4440 314307 : rtt->var_rtt = FD_QUIC_INITIAL_RTT_US * (float)quic->config.tick_per_us * 0.5f;
4441 314307 : conn->rtt_period_ticks = FD_QUIC_RTT_PERIOD_US * (float)quic->config.tick_per_us;
4442 :
4443 : /* highest peer encryption level */
4444 314307 : conn->peer_enc_level = 0;
4445 :
4446 : /* idle timeout */
4447 314307 : conn->idle_timeout_ticks = config->idle_timeout;
4448 314307 : conn->last_activity = state->now;
4449 :
4450 : /* update metrics */
4451 314307 : quic->metrics.conn_active_cnt++;
4452 314307 : quic->metrics.conn_created_cnt++;
4453 :
4454 : /* immediately schedule it */
4455 314307 : fd_quic_svc_schedule( state, conn, FD_QUIC_SVC_WAIT );
4456 :
4457 : /* return connection */
4458 314307 : return conn;
4459 314307 : }
4460 :
4461 : ulong
4462 150147 : fd_quic_get_next_wakeup( fd_quic_t * quic ) {
4463 : /* FIXME not optimized for performance */
4464 150147 : fd_quic_state_t * state = fd_quic_get_state( quic );
4465 150147 : if( state->svc_queue[ FD_QUIC_SVC_INSTANT ].tail != UINT_MAX ) return 0UL;
4466 :
4467 102099 : long ack_wakeup = LONG_MAX;
4468 102099 : long wait_wakeup = LONG_MAX;
4469 102099 : if( state->svc_queue[ FD_QUIC_SVC_ACK_TX ].head != UINT_MAX ) {
4470 47100 : fd_quic_conn_t * conn = fd_quic_conn_at_idx( state, state->svc_queue[ FD_QUIC_SVC_ACK_TX ].head );
4471 47100 : ack_wakeup = (long)conn->svc_time;
4472 47100 : }
4473 102099 : if( state->svc_queue[ FD_QUIC_SVC_WAIT ].head != UINT_MAX ) {
4474 54996 : fd_quic_conn_t * conn = fd_quic_conn_at_idx( state, state->svc_queue[ FD_QUIC_SVC_WAIT ].head );
4475 54996 : wait_wakeup = (long)conn->svc_time;
4476 54996 : }
4477 :
4478 102099 : return (ulong)fd_long_max( fd_long_min( ack_wakeup, wait_wakeup ), 0L );
4479 150147 : }
4480 :
4481 : /* frame handling function default definitions */
4482 : static ulong
4483 : fd_quic_handle_padding_frame(
4484 : fd_quic_frame_ctx_t * ctx FD_PARAM_UNUSED,
4485 : fd_quic_padding_frame_t * data FD_PARAM_UNUSED,
4486 : uchar const * const p0,
4487 6021 : ulong p_sz ) {
4488 6021 : uchar const * p = p0;
4489 6021 : uchar const * const p_end = p + p_sz;
4490 5954775 : while( p<p_end && p[0]==0 ) p++;
4491 6021 : return (ulong)( p - p0 );
4492 6021 : }
4493 :
4494 : static ulong
4495 : fd_quic_handle_ping_frame(
4496 : fd_quic_frame_ctx_t * ctx,
4497 : fd_quic_ping_frame_t * data FD_PARAM_UNUSED,
4498 : uchar const * p0,
4499 231 : ulong p_sz ) {
4500 231 : FD_DTRACE_PROBE_1( quic_handle_ping_frame, ctx->conn->our_conn_id );
4501 : /* skip pings and pads */
4502 231 : uchar const * p = p0;
4503 231 : uchar const * const p_end = p + p_sz;
4504 4011 : while( p < p_end && ((uint)p[0] & 0xfeu) == 0 ) p++;
4505 231 : return (ulong)( p - p0 );
4506 231 : }
4507 :
4508 : /* Retry packet metadata
4509 : This will force pkt_meta to be returned to the free list
4510 : for use. It does so by finding unack'ed packet metadata
4511 : and setting the data up for retransmission.
4512 : Set force to 1 to force pkt_meta to be reclaimed even if
4513 : the ack timer hasn't expired. This is used when pkt_meta
4514 : is required immediately and none is available */
4515 : void
4516 : fd_quic_pkt_meta_retry( fd_quic_t * quic,
4517 : fd_quic_conn_t * conn,
4518 : int force,
4519 13552975 : uint arg_enc_level ) {
4520 13552975 : fd_quic_conn_stream_rx_t * srx = conn->srx;
4521 :
4522 13552975 : ulong now = fd_quic_get_state( quic )->now;
4523 :
4524 : /* minimum pkt_meta required to be freed
4525 : If not forcing, 0 is applicable
4526 : Otherwise, we should allow for a normal packet, which
4527 : will likely consist of the following:
4528 : 1 ack
4529 : 1 max streams
4530 : 1 max data
4531 : 1 stream data */
4532 13552975 : ulong min_freed = force ? 4U : 0U;
4533 :
4534 : /* count of freed pkt_meta */
4535 13552975 : ulong cnt_freed = 0u;
4536 :
4537 13552975 : fd_quic_pkt_meta_tracker_t * tracker = &conn->pkt_meta_tracker;
4538 13552975 : fd_quic_pkt_meta_t * pool = tracker->pool;
4539 :
4540 : /* used for metric tracking */
4541 13552975 : ulong prev_retx_pkt_num[FD_QUIC_NUM_ENC_LEVELS] = { ~0ul, ~0ul, ~0ul, ~0ul };
4542 :
4543 13552990 : while(1) {
4544 : /* find earliest expiring pkt_meta, over smallest pkt number at each enc_level */
4545 13552990 : uint enc_level = arg_enc_level;
4546 13552990 : uint peer_enc_level = conn->peer_enc_level;
4547 13552990 : ulong expiry = ~0ul;
4548 13552990 : if( arg_enc_level == ~0u ) {
4549 67764950 : for( uint j = 0u; j < 4u; ++j ) {
4550 : /* TODO this only checks smallest pkt number,
4551 : assuming that pkt numbers are monotonically increasing
4552 : over time. So it checks in 'sent' time order, but not expiry time. */
4553 54211960 : #if 1
4554 54211960 : fd_quic_pkt_meta_t * pkt_meta = fd_quic_pkt_meta_min( &tracker->sent_pkt_metas[j], pool );
4555 54211960 : if( !pkt_meta ) continue;
4556 :
4557 13086529 : if( enc_level == ~0u || pkt_meta->expiry < expiry ) {
4558 13086529 : enc_level = j;
4559 13086529 : expiry = pkt_meta->expiry;
4560 13086529 : }
4561 : #else
4562 : fd_quic_pkt_meta_t * pkt_meta = pool->sent_pkt_meta[j].head;
4563 : while( pkt_meta ) {
4564 : if( enc_level == ~0u || pkt_meta->expiry < expiry ) {
4565 : enc_level = j;
4566 : expiry = pkt_meta->expiry;
4567 : }
4568 : if( enc_level < peer_enc_level ) break;
4569 : pkt_meta = pkt_meta->next;
4570 : }
4571 : if( enc_level != ~0u ) break;
4572 : #endif
4573 13086529 : }
4574 13552990 : } else {
4575 0 : fd_quic_pkt_meta_t * pkt_meta = fd_quic_pkt_meta_min( &tracker->sent_pkt_metas[enc_level], pool );
4576 0 : if( !pkt_meta ) {
4577 0 : return;
4578 0 : }
4579 :
4580 0 : expiry = pkt_meta->expiry;
4581 0 : }
4582 :
4583 13552990 : if( enc_level == ~0u ) return;
4584 :
4585 13086529 : int exit = 0;
4586 13086529 : if( force ) {
4587 : /* we're forcing, quit when we've freed enough */
4588 0 : if( cnt_freed >= min_freed ) exit = 1;
4589 13086529 : } else {
4590 : /* not forcing, so quit if nothing has expired */
4591 13086529 : if( expiry > now ) {
4592 13086514 : exit = 1;
4593 13086514 : }
4594 13086529 : }
4595 :
4596 13086529 : if( exit ) {
4597 13086514 : if( expiry != ~0ul ) fd_quic_svc_schedule1( conn, FD_QUIC_SVC_WAIT );
4598 13086514 : return;
4599 13086514 : };
4600 :
4601 15 : fd_quic_pkt_meta_t * pkt_meta = fd_quic_pkt_meta_min( &tracker->sent_pkt_metas[enc_level], pool );
4602 :
4603 : /* already moved to another enc_level */
4604 15 : if( enc_level < peer_enc_level ) {
4605 0 : cnt_freed += fd_quic_abandon_enc_level( conn, peer_enc_level );
4606 0 : continue;
4607 0 : }
4608 :
4609 15 : quic->metrics.pkt_retransmissions_cnt += !(pkt_meta->key.pkt_num == prev_retx_pkt_num[enc_level]);
4610 15 : prev_retx_pkt_num[enc_level] = pkt_meta->key.pkt_num;
4611 :
4612 15 : FD_DTRACE_PROBE_4( quic_pkt_meta_retry, conn->our_conn_id, (ulong)pkt_meta->key.pkt_num, pkt_meta->expiry, (uchar)pkt_meta->key.type);
4613 :
4614 : /* set the data to retry */
4615 15 : uint type = pkt_meta->key.type;
4616 15 : switch( type ) {
4617 0 : case FD_QUIC_PKT_META_TYPE_HS_DATA:
4618 0 : do {
4619 0 : ulong offset = fd_ulong_max( conn->hs_ackd_bytes[enc_level], pkt_meta->val.range.offset_lo );
4620 0 : if( offset < conn->hs_sent_bytes[enc_level] ) {
4621 0 : conn->hs_sent_bytes[enc_level] = offset;
4622 0 : conn->upd_pkt_number = FD_QUIC_PKT_NUM_PENDING;
4623 0 : }
4624 0 : } while(0);
4625 0 : break;
4626 :
4627 0 : case FD_QUIC_PKT_META_TYPE_STREAM:
4628 0 : do {
4629 0 : ulong stream_id = pkt_meta->key.stream_id;
4630 :
4631 : /* find the stream */
4632 0 : fd_quic_stream_t * stream = NULL;
4633 0 : fd_quic_stream_map_t * stream_entry = fd_quic_stream_map_query( conn->stream_map, stream_id, NULL );
4634 0 : if( FD_LIKELY( stream_entry && stream_entry->stream &&
4635 0 : ( stream_entry->stream->stream_flags & FD_QUIC_STREAM_FLAGS_DEAD ) == 0 ) ) {
4636 0 : stream = stream_entry->stream;
4637 :
4638 : /* do not try sending data that has been acked */
4639 0 : ulong offset = fd_ulong_max( pkt_meta->val.range.offset_lo, stream->tx_buf.tail );
4640 :
4641 : /* any data left to retry? */
4642 0 : stream->tx_sent = fd_ulong_min( stream->tx_sent, offset );
4643 :
4644 : /* do we have anything to send? */
4645 : /* TODO may need to send fin, also */
4646 0 : if( FD_LIKELY( stream->tx_sent < stream->tx_buf.head ) ) {
4647 :
4648 : /* insert into send list */
4649 0 : FD_QUIC_STREAM_LIST_REMOVE( stream );
4650 0 : FD_QUIC_STREAM_LIST_INSERT_BEFORE( conn->send_streams, stream );
4651 :
4652 : /* set the data to go out on the next packet */
4653 0 : stream->stream_flags |= FD_QUIC_STREAM_FLAGS_UNSENT; /* we have unsent data */
4654 0 : stream->upd_pkt_number = FD_QUIC_PKT_NUM_PENDING;
4655 0 : } else {
4656 : /* fd_quic_tx_stream_free also notifies the user */
4657 0 : fd_quic_tx_stream_free( conn->quic, conn, stream, FD_QUIC_STREAM_NOTIFY_END );
4658 0 : }
4659 0 : }
4660 0 : } while(0);
4661 0 : break;
4662 :
4663 0 : case FD_QUIC_PKT_META_TYPE_HS_DONE:
4664 0 : if( FD_LIKELY( !conn->handshake_done_ackd ) ) {
4665 0 : conn->handshake_done_send = 1;
4666 0 : conn->upd_pkt_number = FD_QUIC_PKT_NUM_PENDING;
4667 0 : }
4668 0 : break;
4669 :
4670 0 : case FD_QUIC_PKT_META_TYPE_MAX_DATA:
4671 0 : if( srx->rx_max_data_ackd < srx->rx_max_data ) {
4672 0 : conn->flags |= FD_QUIC_CONN_FLAGS_MAX_DATA;
4673 0 : conn->upd_pkt_number = FD_QUIC_PKT_NUM_PENDING;
4674 0 : }
4675 0 : break;
4676 :
4677 0 : case FD_QUIC_PKT_META_TYPE_MAX_STREAMS_UNIDIR:
4678 0 : do {
4679 : /* do we still need to send? */
4680 : /* get required value */
4681 0 : ulong max_streams_unidir = srx->rx_sup_stream_id >> 2;
4682 :
4683 0 : if( max_streams_unidir > srx->rx_max_streams_unidir_ackd ) {
4684 : /* set the data to go out on the next packet */
4685 0 : conn->flags |= FD_QUIC_CONN_FLAGS_MAX_STREAMS_UNIDIR;
4686 0 : conn->upd_pkt_number = FD_QUIC_PKT_NUM_PENDING;
4687 0 : }
4688 0 : } while(0);
4689 0 : break;
4690 :
4691 0 : case FD_QUIC_PKT_META_TYPE_CLOSE:
4692 0 : conn->flags &= ~FD_QUIC_CONN_FLAGS_CLOSE_SENT;
4693 0 : conn->upd_pkt_number = FD_QUIC_PKT_NUM_PENDING;
4694 0 : break;
4695 :
4696 15 : case FD_QUIC_PKT_META_TYPE_PING:
4697 15 : conn->flags = ( conn->flags & ~FD_QUIC_CONN_FLAGS_PING_SENT )
4698 15 : | FD_QUIC_CONN_FLAGS_PING;
4699 15 : conn->upd_pkt_number = FD_QUIC_PKT_NUM_PENDING;
4700 15 : break;
4701 15 : }
4702 :
4703 : /* reschedule to ensure the data gets processed */
4704 15 : fd_quic_svc_schedule1( conn, FD_QUIC_SVC_INSTANT );
4705 :
4706 : /* free pkt_meta */
4707 15 : fd_quic_pkt_meta_remove_range( &tracker->sent_pkt_metas[enc_level],
4708 15 : pool,
4709 15 : pkt_meta->key.pkt_num,
4710 15 : pkt_meta->key.pkt_num );
4711 :
4712 15 : conn->used_pkt_meta -= 1;
4713 15 : cnt_freed++;
4714 15 : }
4715 13552975 : }
4716 :
4717 : /* reclaim resources associated with packet metadata
4718 : this is called in response to received acks */
4719 : void
4720 : fd_quic_reclaim_pkt_meta( fd_quic_conn_t * conn,
4721 : fd_quic_pkt_meta_t * pkt_meta,
4722 13325118 : uint enc_level ) {
4723 13325118 : fd_quic_conn_stream_rx_t * srx = conn->srx;
4724 :
4725 13325118 : uint type = pkt_meta->key.type;
4726 13325118 : fd_quic_range_t range = pkt_meta->val.range;
4727 :
4728 13325118 : switch( type ) {
4729 :
4730 3 : case FD_QUIC_PKT_META_TYPE_PING:
4731 3 : do {
4732 3 : conn->flags &= ~( FD_QUIC_CONN_FLAGS_PING | FD_QUIC_CONN_FLAGS_PING_SENT );
4733 3 : } while(0);
4734 3 : break;
4735 :
4736 24987 : case FD_QUIC_PKT_META_TYPE_HS_DATA:
4737 24987 : do {
4738 : /* Note that tls_hs could already be freed */
4739 : /* is this ack'ing the next consecutive bytes?
4740 : if so, we can increase the ack'd bytes
4741 : if not, we retransmit the bytes expected to be ack'd
4742 : we assume a gap means a dropped packet, and
4743 : this policy allows us to free up the pkt_meta here */
4744 24987 : ulong hs_ackd_bytes = conn->hs_ackd_bytes[enc_level];
4745 24987 : if( range.offset_lo <= hs_ackd_bytes ) {
4746 24987 : hs_ackd_bytes = conn->hs_ackd_bytes[enc_level]
4747 24987 : = fd_ulong_max( hs_ackd_bytes, range.offset_hi );
4748 :
4749 : /* remove any unused hs_data */
4750 24987 : fd_quic_tls_hs_data_t * hs_data = NULL;
4751 :
4752 24987 : hs_data = fd_quic_tls_get_hs_data( conn->tls_hs, enc_level );
4753 67134 : while( hs_data && hs_data->offset + hs_data->data_sz <= hs_ackd_bytes ) {
4754 42147 : fd_quic_tls_pop_hs_data( conn->tls_hs, enc_level );
4755 42147 : hs_data = fd_quic_tls_get_hs_data( conn->tls_hs, enc_level );
4756 42147 : }
4757 24987 : } else {
4758 0 : conn->hs_sent_bytes[enc_level] =
4759 0 : fd_ulong_min( conn->hs_sent_bytes[enc_level], hs_ackd_bytes );
4760 0 : conn->upd_pkt_number = FD_QUIC_PKT_NUM_PENDING;
4761 0 : }
4762 24987 : } while(0);
4763 24987 : break;
4764 :
4765 6021 : case FD_QUIC_PKT_META_TYPE_HS_DONE:
4766 6021 : do {
4767 6021 : conn->handshake_done_ackd = 1;
4768 6021 : conn->handshake_done_send = 0;
4769 6021 : if( FD_LIKELY( conn->tls_hs ) ) {
4770 6021 : fd_quic_state_t * state = fd_quic_get_state( conn->quic );
4771 6021 : fd_quic_tls_hs_delete( conn->tls_hs );
4772 6021 : fd_quic_tls_hs_cache_ele_remove( &state->hs_cache, conn->tls_hs, state->hs_pool );
4773 6021 : fd_quic_tls_hs_pool_ele_release( state->hs_pool, conn->tls_hs );
4774 6021 : conn->tls_hs = NULL;
4775 6021 : }
4776 6021 : } while(0);
4777 6021 : break;
4778 :
4779 0 : case FD_QUIC_PKT_META_TYPE_MAX_DATA:
4780 0 : do {
4781 0 : ulong max_data_ackd = pkt_meta->val.scalar;
4782 :
4783 : /* ack can only increase max_data_ackd */
4784 0 : max_data_ackd = fd_ulong_max( max_data_ackd, srx->rx_max_data_ackd );
4785 :
4786 : /* max_data_ackd > rx_max_data is a protocol violation */
4787 0 : if( FD_UNLIKELY( max_data_ackd > srx->rx_max_data ) ) {
4788 : /* this is a protocol violation, so inform the peer */
4789 0 : fd_quic_conn_error( conn, FD_QUIC_CONN_REASON_PROTOCOL_VIOLATION, __LINE__ );
4790 0 : return;
4791 0 : }
4792 :
4793 : /* clear flag only if acked value == current value */
4794 0 : if( FD_LIKELY( max_data_ackd == srx->rx_max_data ) ) {
4795 0 : conn->flags &= ~FD_QUIC_CONN_FLAGS_MAX_DATA;
4796 0 : }
4797 :
4798 : /* set the ackd value */
4799 0 : srx->rx_max_data_ackd = max_data_ackd;
4800 0 : } while(0);
4801 0 : break;
4802 :
4803 0 : case FD_QUIC_PKT_META_TYPE_MAX_STREAMS_UNIDIR:
4804 0 : do {
4805 0 : ulong max_streams_unidir_ackd = pkt_meta->val.scalar;
4806 :
4807 : /* ack can only increase max_streams_unidir_ackd */
4808 0 : max_streams_unidir_ackd = fd_ulong_max( max_streams_unidir_ackd, srx->rx_max_streams_unidir_ackd );
4809 :
4810 : /* get required value */
4811 0 : ulong max_streams_unidir = srx->rx_sup_stream_id >> 2;
4812 :
4813 : /* clear flag only if acked value == current value */
4814 0 : if( FD_LIKELY( max_streams_unidir_ackd == max_streams_unidir ) ) {
4815 0 : conn->flags &= ~FD_QUIC_CONN_FLAGS_MAX_STREAMS_UNIDIR;
4816 0 : }
4817 :
4818 : /* set the ackd value */
4819 0 : srx->rx_max_streams_unidir_ackd = max_streams_unidir_ackd;
4820 0 : } while(0);
4821 0 : break;
4822 :
4823 13294104 : case FD_QUIC_PKT_META_TYPE_STREAM:
4824 13294104 : do {
4825 13294104 : ulong stream_id = pkt_meta->key.stream_id;
4826 13294104 : fd_quic_range_t range = pkt_meta->val.range;
4827 :
4828 : /* find the stream */
4829 13294104 : fd_quic_stream_t * stream = NULL;
4830 13294104 : fd_quic_stream_map_t * stream_entry = fd_quic_stream_map_query( conn->stream_map, stream_id, NULL );
4831 13294104 : if( FD_LIKELY( stream_entry && stream_entry->stream &&
4832 13294104 : ( stream_entry->stream->stream_flags & FD_QUIC_STREAM_FLAGS_DEAD ) == 0 ) ) {
4833 13288110 : stream = stream_entry->stream;
4834 :
4835 : /* do not try sending data that has been acked */
4836 :
4837 13288110 : ulong tx_tail = stream->tx_buf.tail;
4838 13288110 : ulong tx_sent = stream->tx_sent;
4839 :
4840 : /* ignore bytes which were already acked */
4841 13288110 : if( range.offset_lo < tx_tail ) range.offset_lo = tx_tail;
4842 :
4843 : /* verify offset_hi */
4844 13288110 : if( FD_UNLIKELY( range.offset_hi > stream->tx_buf.head ) ) {
4845 : /* offset_hi in the pkt_meta (the highest byte offset in the packet */
4846 : /* should never exceed tx_buf.head - the highest byte offset in the */
4847 : /* stream */
4848 0 : fd_quic_conn_error( conn, FD_QUIC_CONN_REASON_INTERNAL_ERROR, __LINE__ );
4849 0 : return;
4850 13288110 : } else {
4851 : /* did they ack the first byte in the range? */
4852 13288110 : if( FD_LIKELY( range.offset_lo == tx_tail ) ) {
4853 :
4854 : /* then simply move the tail up */
4855 13288110 : tx_tail = range.offset_hi;
4856 :
4857 : /* need to clear the acks */
4858 13288110 : ulong tx_mask = stream->tx_buf.cap - 1ul;
4859 13288110 : uchar * tx_ack = stream->tx_ack;
4860 1972158117 : for( ulong j = range.offset_lo; j < range.offset_hi; ) {
4861 1958870007 : ulong k = j & tx_mask;
4862 1958870007 : if( ( k & 7ul ) == 0ul && j + 8ul <= range.offset_hi ) {
4863 : /* process 8 bits */
4864 1918820787 : tx_ack[k>>3ul] = 0;
4865 1918820787 : j+=8;
4866 1918820787 : } else {
4867 : /* process 1 bit */
4868 40049220 : tx_ack[k>>3ul] &= (uchar)(0xff ^ ( 1ul << ( k & 7ul ) ) );
4869 40049220 : j++;
4870 40049220 : }
4871 1958870007 : }
4872 13288110 : } else {
4873 : /* set appropriate bits in tx_ack */
4874 : /* TODO optimize this */
4875 0 : ulong tx_mask = stream->tx_buf.cap - 1ul;
4876 0 : ulong cnt = range.offset_hi - range.offset_lo;
4877 0 : uchar * tx_ack = stream->tx_ack;
4878 0 : for( ulong j = 0ul; j < cnt; ) {
4879 0 : ulong k = ( j + range.offset_lo ) & tx_mask;
4880 0 : if( ( k & 7ul ) == 0ul && j + 8ul <= cnt ) {
4881 : /* set whole byte */
4882 0 : tx_ack[k>>3ul] = 0xffu;
4883 :
4884 0 : j += 8ul;
4885 0 : } else {
4886 : /* compiler is not smart enough to know ( 1u << ( k & 7u ) ) fits in a uchar */
4887 0 : tx_ack[k>>3ul] |= (uchar)( 1ul << ( k & 7ul ) );
4888 0 : j++;
4889 0 : }
4890 0 : }
4891 :
4892 : /* determine whether tx_tail may be moved up */
4893 0 : for( ulong j = tx_tail; j < tx_sent; ) {
4894 0 : ulong k = j & tx_mask;
4895 :
4896 : /* can we skip a whole byte? */
4897 0 : if( ( k & 7ul ) == 0ul && j + 8ul <= tx_sent && tx_ack[k>>3ul] == 0xffu ) {
4898 0 : tx_ack[k>>3ul] = 0u;
4899 0 : tx_tail += 8ul;
4900 :
4901 0 : j += 8ul;
4902 0 : } else {
4903 0 : if( tx_ack[k>>3ul] & ( 1u << ( k & 7u ) ) ) {
4904 0 : tx_ack[k>>3ul] = (uchar)( tx_ack[k>>3ul] & ~( 1u << ( k & 7u ) ) );
4905 0 : tx_tail++;
4906 0 : j++;
4907 0 : } else {
4908 0 : break;
4909 0 : }
4910 0 : }
4911 0 : }
4912 0 : }
4913 :
4914 : /* For convenience */
4915 13288110 : uint fin_state_mask = FD_QUIC_STREAM_STATE_TX_FIN | FD_QUIC_STREAM_STATE_RX_FIN;
4916 :
4917 : /* move up tail, and adjust to maintain circular queue invariants, and send
4918 : max_data and max_stream_data, if necessary */
4919 13288110 : if( tx_tail > stream->tx_buf.tail ) {
4920 13288104 : stream->tx_buf.tail = tx_tail;
4921 :
4922 : /* if we have data to send, reschedule */
4923 13288104 : if( fd_quic_buffer_used( &stream->tx_buf ) ) {
4924 16767 : stream->upd_pkt_number = FD_QUIC_PKT_NUM_PENDING;
4925 16767 : if( !FD_QUIC_STREAM_ACTION( stream ) ) {
4926 : /* going from 0 to nonzero, so insert into action list */
4927 9345 : FD_QUIC_STREAM_LIST_REMOVE( stream );
4928 9345 : FD_QUIC_STREAM_LIST_INSERT_BEFORE( conn->send_streams, stream );
4929 9345 : }
4930 :
4931 16767 : stream->stream_flags |= FD_QUIC_STREAM_FLAGS_UNSENT;
4932 :
4933 16767 : fd_quic_svc_schedule1( conn, FD_QUIC_SVC_INSTANT );
4934 13271337 : } else {
4935 : /* if no data to send, check whether fin bits are set */
4936 13271337 : if( ( stream->state & fin_state_mask ) == fin_state_mask ) {
4937 : /* fd_quic_tx_stream_free also notifies the user */
4938 13271337 : fd_quic_tx_stream_free( conn->quic, conn, stream, FD_QUIC_STREAM_NOTIFY_END );
4939 13271337 : }
4940 13271337 : }
4941 13288104 : } else if( tx_tail == stream->tx_buf.tail &&
4942 6 : ( stream->state & fin_state_mask ) == fin_state_mask ) {
4943 : /* fd_quic_tx_stream_free also notifies the user */
4944 6 : fd_quic_tx_stream_free( conn->quic, conn, stream, FD_QUIC_STREAM_NOTIFY_END );
4945 6 : }
4946 :
4947 : /* we could retransmit (timeout) the bytes which have not been acked (by implication) */
4948 13288110 : }
4949 13288110 : }
4950 13294104 : } while(0);
4951 13294104 : break;
4952 13325118 : }
4953 13325118 : }
4954 : /* process lost packets
4955 : * These packets will be declared lost and relevant data potentially resent */
4956 : void
4957 0 : fd_quic_process_lost( fd_quic_conn_t * conn, uint enc_level, ulong cnt ) {
4958 : /* start at oldest sent */
4959 0 : fd_quic_pkt_meta_tracker_t * tracker = &conn->pkt_meta_tracker;
4960 0 : fd_quic_pkt_meta_t * pool = tracker->pool;
4961 0 : fd_quic_pkt_meta_ds_t * sent = &tracker->sent_pkt_metas[enc_level];
4962 0 : ulong j = 0;
4963 :
4964 0 : for( fd_quic_pkt_meta_ds_fwd_iter_t iter = fd_quic_pkt_meta_ds_fwd_iter_init( sent, pool );
4965 0 : !fd_quic_pkt_meta_ds_fwd_iter_done( iter );
4966 0 : iter = fd_quic_pkt_meta_ds_fwd_iter_next( iter, pool ) ) {
4967 0 : fd_quic_pkt_meta_t * pkt_meta = fd_quic_pkt_meta_ds_fwd_iter_ele( iter, pool );
4968 0 : if( FD_LIKELY( j < cnt ) ) {
4969 0 : pkt_meta->expiry = 0; /* force expiry */
4970 0 : } else {
4971 0 : break;
4972 0 : }
4973 0 : j++;
4974 0 : }
4975 :
4976 : /* trigger the retries */
4977 0 : fd_quic_pkt_meta_retry( conn->quic, conn, 0 /* don't force */, enc_level );
4978 0 : }
4979 :
4980 : /* process ack range
4981 : applies to pkt_number in [largest_ack - ack_range, largest_ack] */
4982 : void
4983 : fd_quic_process_ack_range( fd_quic_conn_t * conn,
4984 : fd_quic_frame_ctx_t * context,
4985 : uint enc_level,
4986 : ulong largest_ack,
4987 : ulong ack_range,
4988 : int is_largest,
4989 : ulong now,
4990 251355 : ulong ack_delay ) {
4991 : /* FIXME: Close connection if peer ACKed a higher packet number than we sent */
4992 :
4993 251355 : fd_quic_pkt_t * pkt = context->pkt;
4994 :
4995 : /* inclusive range */
4996 251355 : ulong hi = largest_ack;
4997 251355 : ulong lo = largest_ack - ack_range;
4998 251355 : FD_DTRACE_PROBE_4( quic_process_ack_range, conn->our_conn_id, enc_level, lo, hi );
4999 :
5000 251355 : fd_quic_pkt_meta_tracker_t * tracker = &conn->pkt_meta_tracker;
5001 251355 : fd_quic_pkt_meta_t * pool = tracker->pool;
5002 251355 : fd_quic_pkt_meta_ds_t * sent = &tracker->sent_pkt_metas[enc_level];
5003 :
5004 : /* start at oldest sent */
5005 251355 : for( fd_quic_pkt_meta_ds_fwd_iter_t iter = fd_quic_pkt_meta_ds_idx_ge( sent, lo, pool );
5006 13564428 : !fd_quic_pkt_meta_ds_fwd_iter_done( iter );
5007 13319139 : iter = fd_quic_pkt_meta_ds_fwd_iter_next( iter, pool ) ) {
5008 13319139 : fd_quic_pkt_meta_t * e = fd_quic_pkt_meta_ds_fwd_iter_ele( iter, pool );
5009 13319139 : if( FD_UNLIKELY( e->key.pkt_num > hi ) ) break;
5010 13313073 : if( is_largest && e->key.pkt_num == hi && hi >= pkt->rtt_pkt_number ) {
5011 257166 : pkt->rtt_pkt_number = hi;
5012 257166 : pkt->rtt_ack_time = now - e->tx_time; /* in ticks */
5013 257166 : pkt->rtt_ack_delay = ack_delay; /* in peer units */
5014 257166 : }
5015 13313073 : fd_quic_reclaim_pkt_meta( conn, e, enc_level );
5016 13313073 : }
5017 :
5018 251355 : conn->used_pkt_meta -= fd_quic_pkt_meta_remove_range( sent, pool, lo, hi );
5019 251355 : }
5020 :
5021 : static ulong
5022 : fd_quic_handle_ack_frame( fd_quic_frame_ctx_t * context,
5023 : fd_quic_ack_frame_t * data,
5024 : uchar const * p,
5025 251193 : ulong p_sz ) {
5026 251193 : fd_quic_conn_t * conn = context->conn;
5027 251193 : uint enc_level = context->pkt->enc_level;
5028 :
5029 251193 : if( FD_UNLIKELY( data->first_ack_range > data->largest_ack ) ) {
5030 : /* this is a protocol violation, so inform the peer */
5031 0 : fd_quic_frame_error( context, FD_QUIC_CONN_REASON_PROTOCOL_VIOLATION, __LINE__ );
5032 0 : return FD_QUIC_PARSE_FAIL;
5033 0 : }
5034 :
5035 251193 : fd_quic_state_t * state = fd_quic_get_state( context->quic );
5036 251193 : conn->last_ack = state->now;
5037 :
5038 : /* track lowest packet acked */
5039 251193 : ulong low_ack_pkt_number = data->largest_ack - data->first_ack_range;
5040 :
5041 : /* process ack range
5042 : applies to pkt_number in [largest_ack - first_ack_range, largest_ack] */
5043 251193 : fd_quic_process_ack_range( conn,
5044 251193 : context,
5045 251193 : enc_level,
5046 251193 : data->largest_ack,
5047 251193 : data->first_ack_range,
5048 251193 : 1 /* is_largest */,
5049 251193 : state->now,
5050 251193 : data->ack_delay );
5051 :
5052 251193 : uchar const * p_str = p;
5053 251193 : uchar const * p_end = p + p_sz;
5054 :
5055 251193 : ulong ack_range_count = data->ack_range_count;
5056 :
5057 : /* cur_pkt_number holds the packet number of the lowest processed
5058 : and acknowledged packet
5059 : This should always be a valid packet number >= 0 */
5060 251193 : ulong cur_pkt_number = data->largest_ack - data->first_ack_range;
5061 :
5062 : /* walk thru ack ranges */
5063 251223 : for( ulong j = 0UL; j < ack_range_count; ++j ) {
5064 54 : if( FD_UNLIKELY( p_end <= p ) ) {
5065 6 : fd_quic_frame_error( context, FD_QUIC_CONN_REASON_FRAME_ENCODING_ERROR, __LINE__ );
5066 6 : return FD_QUIC_PARSE_FAIL;
5067 6 : }
5068 :
5069 48 : fd_quic_ack_range_frag_t ack_range[1];
5070 48 : ulong rc = fd_quic_decode_ack_range_frag( ack_range, p, (ulong)( p_end - p ) );
5071 48 : if( FD_UNLIKELY( rc == FD_QUIC_PARSE_FAIL ) ) {
5072 6 : fd_quic_frame_error( context, FD_QUIC_CONN_REASON_FRAME_ENCODING_ERROR, __LINE__ );
5073 6 : return FD_QUIC_PARSE_FAIL;
5074 6 : }
5075 :
5076 : /* ensure we have ulong local vars, regardless of ack_range definition */
5077 42 : ulong gap = (ulong)ack_range->gap;
5078 42 : ulong length = (ulong)ack_range->length;
5079 :
5080 : /* sanity check before unsigned arithmetic */
5081 42 : if( FD_UNLIKELY( ( gap > ( ~0x3UL ) ) |
5082 42 : ( length > ( ~0x3UL ) ) ) ) {
5083 : /* This is an unreasonably large value, so fail with protocol violation
5084 : It's also likely impossible due to the encoding method */
5085 0 : fd_quic_frame_error( context, FD_QUIC_CONN_REASON_PROTOCOL_VIOLATION, __LINE__ );
5086 0 : return FD_QUIC_PARSE_FAIL;
5087 0 : }
5088 :
5089 : /* The number of packet numbers to skip (they are not being acked) is
5090 : ack_range->gap + 2
5091 : This is +1 to get from the lowest acked packet to the highest unacked packet
5092 : and +1 because the count of packets in the gap is (ack_range->gap+1) */
5093 42 : ulong skip = gap + 2UL;
5094 :
5095 : /* verify the skip and length values are valid */
5096 42 : if( FD_UNLIKELY( skip + length > cur_pkt_number ) ) {
5097 : /* this is a protocol violation, so inform the peer */
5098 12 : fd_quic_frame_error( context, FD_QUIC_CONN_REASON_PROTOCOL_VIOLATION, __LINE__ );
5099 12 : return FD_QUIC_PARSE_FAIL;
5100 12 : }
5101 :
5102 : /* track lowest */
5103 30 : ulong lo_pkt_number = cur_pkt_number - skip - length;
5104 30 : low_ack_pkt_number = fd_ulong_min( low_ack_pkt_number, lo_pkt_number );
5105 :
5106 : /* process ack range */
5107 30 : fd_quic_process_ack_range( conn,
5108 30 : context,
5109 30 : enc_level,
5110 30 : cur_pkt_number - skip,
5111 30 : length,
5112 30 : 0 /* is_largest */,
5113 30 : state->now,
5114 30 : 0 /* ack_delay not used here */ );
5115 :
5116 : /* Find the next lowest processed and acknowledged packet number
5117 : This should get us to the next lowest processed and acknowledged packet
5118 : number */
5119 30 : cur_pkt_number -= skip + length;
5120 :
5121 30 : p += rc;
5122 30 : }
5123 :
5124 : /* process lost packets */
5125 251169 : {
5126 251169 : fd_quic_pkt_meta_tracker_t * tracker = &conn->pkt_meta_tracker;
5127 251169 : fd_quic_pkt_meta_t * pool = tracker->pool;
5128 251169 : fd_quic_pkt_meta_ds_t * sent = &tracker->sent_pkt_metas[enc_level];
5129 251169 : fd_quic_pkt_meta_t * min_meta = fd_quic_pkt_meta_min( sent, pool );
5130 :
5131 251169 : if( FD_UNLIKELY( min_meta && min_meta->key.pkt_num < low_ack_pkt_number ) ) {
5132 3 : ulong skipped = 0;
5133 3 : for( fd_quic_pkt_meta_ds_fwd_iter_t iter = fd_quic_pkt_meta_ds_fwd_iter_init( sent, pool );
5134 6 : !fd_quic_pkt_meta_ds_fwd_iter_done( iter );
5135 3 : iter = fd_quic_pkt_meta_ds_fwd_iter_next( iter, pool ) ) {
5136 3 : fd_quic_pkt_meta_t * e = fd_quic_pkt_meta_ds_fwd_iter_ele( iter, pool );
5137 3 : if( FD_UNLIKELY( e->key.pkt_num >= low_ack_pkt_number ) ) break;
5138 3 : skipped++;
5139 3 : }
5140 :
5141 3 : if( FD_UNLIKELY( skipped > 3 ) ) {
5142 0 : fd_quic_process_lost( conn, enc_level, skipped - 3 );
5143 0 : }
5144 3 : }
5145 251169 : }
5146 :
5147 : /* ECN counts
5148 : we currently ignore them, but we must process them to get to the following bytes */
5149 251169 : if( data->type & 1U ) {
5150 0 : if( FD_UNLIKELY( p_end <= p ) ) {
5151 0 : fd_quic_frame_error( context, FD_QUIC_CONN_REASON_FRAME_ENCODING_ERROR, __LINE__ );
5152 0 : return FD_QUIC_PARSE_FAIL;
5153 0 : }
5154 :
5155 0 : fd_quic_ecn_counts_frag_t ecn_counts[1];
5156 0 : ulong rc = fd_quic_decode_ecn_counts_frag( ecn_counts, p, (ulong)( p_end - p ) );
5157 0 : if( rc == FD_QUIC_PARSE_FAIL ) {
5158 0 : fd_quic_frame_error( context, FD_QUIC_CONN_REASON_FRAME_ENCODING_ERROR, __LINE__ );
5159 0 : return FD_QUIC_PARSE_FAIL;
5160 0 : }
5161 :
5162 0 : p += rc;
5163 0 : }
5164 :
5165 251169 : return (ulong)( p - p_str );
5166 251169 : }
5167 :
5168 : static ulong
5169 : fd_quic_handle_reset_stream_frame(
5170 : fd_quic_frame_ctx_t * context,
5171 : fd_quic_reset_stream_frame_t * data,
5172 : uchar const * p FD_PARAM_UNUSED,
5173 0 : ulong p_sz FD_PARAM_UNUSED ) {
5174 : /* TODO implement */
5175 0 : FD_DTRACE_PROBE_4( quic_handle_reset_stream_frame, context->conn->our_conn_id, data->stream_id, data->app_proto_err_code, data->final_size );
5176 0 : return 0UL;
5177 0 : }
5178 :
5179 : static ulong
5180 : fd_quic_handle_stop_sending_frame(
5181 : fd_quic_frame_ctx_t * context,
5182 : fd_quic_stop_sending_frame_t * data,
5183 : uchar const * p FD_PARAM_UNUSED,
5184 0 : ulong p_sz FD_PARAM_UNUSED ) {
5185 0 : FD_DTRACE_PROBE_3( quic_handle_stop_sending_frame, context->conn->our_conn_id, data->stream_id, data->app_proto_err_code );
5186 0 : return 0UL;
5187 0 : }
5188 :
5189 : static ulong
5190 : fd_quic_handle_new_token_frame(
5191 : fd_quic_frame_ctx_t * context,
5192 : fd_quic_new_token_frame_t * data,
5193 : uchar const * p FD_PARAM_UNUSED,
5194 0 : ulong p_sz FD_PARAM_UNUSED ) {
5195 : /* FIXME A server MUST treat receipt of a NEW_TOKEN frame as a connection error of type PROTOCOL_VIOLATION. */
5196 0 : (void)data;
5197 0 : FD_DTRACE_PROBE_1( quic_handle_new_token_frame, context->conn->our_conn_id );
5198 0 : return 0UL;
5199 0 : }
5200 :
5201 : void
5202 : fd_quic_tx_stream_free( fd_quic_t * quic,
5203 : fd_quic_conn_t * conn,
5204 : fd_quic_stream_t * stream,
5205 13283449 : int code ) {
5206 :
5207 : /* TODO rename FD_QUIC_NOTIFY_END to FD_QUIC_STREAM_NOTIFY_END et al */
5208 13283449 : if( FD_LIKELY( stream->state != FD_QUIC_STREAM_STATE_UNUSED ) ) {
5209 13283449 : fd_quic_cb_stream_notify( quic, stream, stream->context, code );
5210 13283449 : stream->state = FD_QUIC_STREAM_STATE_UNUSED;
5211 13283449 : }
5212 :
5213 13283449 : ulong stream_id = stream->stream_id;
5214 :
5215 : /* remove from stream map */
5216 13283449 : fd_quic_stream_map_t * stream_map = conn->stream_map;
5217 13283449 : fd_quic_stream_map_t * stream_entry = fd_quic_stream_map_query( stream_map, stream_id, NULL );
5218 13283449 : if( FD_LIKELY( stream_entry ) ) {
5219 13283449 : if( FD_LIKELY( stream_entry->stream ) ) {
5220 13283449 : stream_entry->stream->stream_flags = FD_QUIC_STREAM_FLAGS_DEAD;
5221 13283449 : }
5222 13283449 : fd_quic_stream_map_remove( stream_map, stream_entry );
5223 13283449 : }
5224 :
5225 : /* remove from list - idempotent */
5226 13283449 : FD_QUIC_STREAM_LIST_REMOVE( stream );
5227 13283449 : stream->stream_flags = FD_QUIC_STREAM_FLAGS_DEAD;
5228 13283449 : stream->stream_id = ~0UL;
5229 :
5230 : /* add to stream_pool */
5231 13283449 : fd_quic_state_t * state = fd_quic_get_state( quic );
5232 13283449 : fd_quic_stream_pool_free( state->stream_pool, stream );
5233 :
5234 13283449 : }
5235 :
5236 :
5237 : static inline __attribute__((always_inline)) ulong
5238 : fd_quic_handle_stream_frame(
5239 : fd_quic_frame_ctx_t * context,
5240 : uchar const * p,
5241 : ulong p_sz,
5242 : ulong stream_id,
5243 : ulong offset,
5244 : ulong data_sz,
5245 92058960 : int fin ) {
5246 92058960 : fd_quic_t * quic = context->quic;
5247 92058960 : fd_quic_conn_t * conn = context->conn;
5248 92058960 : fd_quic_pkt_t * pkt = context->pkt;
5249 :
5250 92058960 : FD_DTRACE_PROBE_5( quic_handle_stream_frame, conn->our_conn_id, stream_id, offset, data_sz, fin );
5251 :
5252 : /* stream_id type check */
5253 92058960 : ulong stream_type = stream_id & 3UL;
5254 92058960 : if( FD_UNLIKELY( stream_type != ( conn->server ? FD_QUIC_STREAM_TYPE_UNI_CLIENT : FD_QUIC_STREAM_TYPE_UNI_SERVER ) ) ) {
5255 0 : FD_DEBUG( FD_LOG_DEBUG(( "Received forbidden stream type" )); )
5256 : /* Technically should switch between STREAM_LIMIT_ERROR and STREAM_STATE_ERROR here */
5257 0 : fd_quic_frame_error( context, FD_QUIC_CONN_REASON_STREAM_LIMIT_ERROR, __LINE__ );
5258 0 : return FD_QUIC_PARSE_FAIL;
5259 0 : }
5260 :
5261 : /* length check */
5262 92058960 : if( FD_UNLIKELY( data_sz > p_sz ) ) {
5263 0 : FD_DEBUG( FD_LOG_DEBUG(( "Stream header indicates %lu bytes length, but only have %lu", data_sz, p_sz )); )
5264 0 : fd_quic_frame_error( context, FD_QUIC_CONN_REASON_FRAME_ENCODING_ERROR, __LINE__ );
5265 0 : return FD_QUIC_PARSE_FAIL;
5266 0 : }
5267 :
5268 92058960 : conn->unacked_sz += data_sz;
5269 :
5270 : /* stream_id outside allowed range - protocol error */
5271 92058960 : if( FD_UNLIKELY( stream_id >= conn->srx->rx_sup_stream_id ) ) {
5272 3 : FD_DEBUG( FD_LOG_DEBUG(( "Stream ID violation detected" )); )
5273 3 : fd_quic_frame_error( context, FD_QUIC_CONN_REASON_STREAM_LIMIT_ERROR, __LINE__ );
5274 3 : return FD_QUIC_PARSE_FAIL;
5275 3 : }
5276 :
5277 : /* A receiver MUST close the connection with an error of type FLOW_CONTROL_ERROR if the sender
5278 : violates the advertised connection or stream data limits */
5279 92058957 : if( FD_UNLIKELY( quic->config.initial_rx_max_stream_data < offset + data_sz ) ) {
5280 3 : FD_DEBUG( FD_LOG_DEBUG(( "Stream data limit exceeded" )); )
5281 3 : fd_quic_frame_error( context, FD_QUIC_CONN_REASON_FLOW_CONTROL_ERROR, __LINE__ );
5282 3 : return FD_QUIC_PARSE_FAIL;
5283 3 : }
5284 :
5285 92058954 : int rx_res = fd_quic_cb_stream_rx( quic, conn, stream_id, offset, p, data_sz, fin );
5286 92058954 : pkt->ack_flag |= fd_uint_if( rx_res==FD_QUIC_SUCCESS, 0U, ACK_FLAG_CANCEL );
5287 :
5288 : /* packet bytes consumed */
5289 92058954 : return data_sz;
5290 92058957 : }
5291 :
5292 : static ulong
5293 : fd_quic_handle_stream_8_frame(
5294 : fd_quic_frame_ctx_t * context,
5295 : fd_quic_stream_8_frame_t * data,
5296 : uchar const * p,
5297 0 : ulong p_sz ) {
5298 0 : return fd_quic_handle_stream_frame( context, p, p_sz, data->stream_id, 0UL, p_sz, data->type&1 );
5299 0 : }
5300 :
5301 : static ulong
5302 : fd_quic_handle_stream_a_frame(
5303 : fd_quic_frame_ctx_t * context,
5304 : fd_quic_stream_a_frame_t * data,
5305 : uchar const * p,
5306 92042097 : ulong p_sz ) {
5307 92042097 : return fd_quic_handle_stream_frame( context, p, p_sz, data->stream_id, 0UL, data->length, data->type&1 );
5308 92042097 : }
5309 :
5310 : static ulong
5311 : fd_quic_handle_stream_c_frame(
5312 : fd_quic_frame_ctx_t * context,
5313 : fd_quic_stream_c_frame_t * data,
5314 : uchar const * p,
5315 0 : ulong p_sz ) {
5316 0 : return fd_quic_handle_stream_frame( context, p, p_sz, data->stream_id, data->offset, p_sz, data->type&1 );
5317 0 : }
5318 :
5319 : static ulong
5320 : fd_quic_handle_stream_e_frame(
5321 : fd_quic_frame_ctx_t * context,
5322 : fd_quic_stream_e_frame_t * data,
5323 : uchar const * p,
5324 16863 : ulong p_sz ) {
5325 16863 : return fd_quic_handle_stream_frame( context, p, p_sz, data->stream_id, data->offset, data->length, data->type&1 );
5326 16863 : }
5327 :
5328 : static ulong
5329 : fd_quic_handle_max_data_frame(
5330 : fd_quic_frame_ctx_t * context,
5331 : fd_quic_max_data_frame_t * data,
5332 : uchar const * p FD_PARAM_UNUSED,
5333 6 : ulong p_sz FD_PARAM_UNUSED ) {
5334 6 : fd_quic_conn_t * conn = context->conn;
5335 :
5336 6 : ulong max_data_old = conn->tx_max_data;
5337 6 : ulong max_data_new = data->max_data;
5338 6 : FD_DTRACE_PROBE_3( quic_handle_max_data_frame, conn->our_conn_id, max_data_new, max_data_old );
5339 :
5340 : /* max data is only allowed to increase the limit. Transgressing frames
5341 : are silently ignored */
5342 6 : conn->tx_max_data = fd_ulong_max( max_data_old, max_data_new );
5343 6 : return 0; /* no additional bytes consumed from buffer */
5344 6 : }
5345 :
5346 : static ulong
5347 : fd_quic_handle_max_stream_data_frame(
5348 : fd_quic_frame_ctx_t * context,
5349 : fd_quic_max_stream_data_frame_t * data,
5350 : uchar const * p FD_PARAM_UNUSED,
5351 0 : ulong p_sz FD_PARAM_UNUSED ) {
5352 : /* FIXME unsupported for now */
5353 0 : FD_DTRACE_PROBE_3( quic_handle_max_stream_data_frame, context->conn->our_conn_id, data->stream_id, data->max_stream_data );
5354 0 : return 0;
5355 0 : }
5356 :
5357 : static ulong
5358 : fd_quic_handle_max_streams_frame(
5359 : fd_quic_frame_ctx_t * context,
5360 : fd_quic_max_streams_frame_t * data,
5361 : uchar const * p FD_PARAM_UNUSED,
5362 9 : ulong p_sz FD_PARAM_UNUSED ) {
5363 9 : fd_quic_conn_t * conn = context->conn;
5364 9 : FD_DTRACE_PROBE_3( quic_handle_max_streams_frame, conn->our_conn_id, data->type, data->max_streams );
5365 :
5366 9 : if( data->type == 0x13 ) {
5367 : /* Only handle unidirectional streams */
5368 6 : ulong type = (ulong)conn->server | 2UL;
5369 6 : ulong peer_sup_stream_id = data->max_streams * 4UL + type;
5370 6 : conn->tx_sup_stream_id = fd_ulong_max( peer_sup_stream_id, conn->tx_sup_stream_id );
5371 6 : }
5372 :
5373 9 : return 0;
5374 9 : }
5375 :
5376 : static ulong
5377 : fd_quic_handle_data_blocked_frame(
5378 : fd_quic_frame_ctx_t * context,
5379 : fd_quic_data_blocked_frame_t * data,
5380 : uchar const * p FD_PARAM_UNUSED,
5381 0 : ulong p_sz FD_PARAM_UNUSED ) {
5382 0 : FD_DTRACE_PROBE_2( quic_handle_data_blocked, context->conn->our_conn_id, data->max_data );
5383 :
5384 : /* Since we do not do runtime allocations, we will not attempt
5385 : to find more memory in the case of DATA_BLOCKED. */
5386 0 : return 0;
5387 0 : }
5388 :
5389 : static ulong
5390 : fd_quic_handle_stream_data_blocked_frame(
5391 : fd_quic_frame_ctx_t * context,
5392 : fd_quic_stream_data_blocked_frame_t * data,
5393 : uchar const * p FD_PARAM_UNUSED,
5394 0 : ulong p_sz FD_PARAM_UNUSED ) {
5395 0 : FD_DTRACE_PROBE_3( quic_handle_stream_data_blocked, context->conn->our_conn_id, data->stream_id, data->max_stream_data );
5396 :
5397 : /* Since we do not do runtime allocations, we will not attempt
5398 : to find more memory in the case of STREAM_DATA_BLOCKED.*/
5399 0 : (void)data;
5400 0 : return 0;
5401 0 : }
5402 :
5403 : static ulong
5404 : fd_quic_handle_streams_blocked_frame(
5405 : fd_quic_frame_ctx_t * context,
5406 : fd_quic_streams_blocked_frame_t * data,
5407 : uchar const * p FD_PARAM_UNUSED,
5408 0 : ulong p_sz FD_PARAM_UNUSED ) {
5409 0 : FD_DTRACE_PROBE_2( quic_handle_streams_blocked_frame, context->conn->our_conn_id, data->max_streams );
5410 :
5411 : /* STREAMS_BLOCKED should be sent by client when it wants
5412 : to use a new stream, but is unable to due to the max_streams
5413 : value
5414 : We can support this in the future, but as of 2024-Dec, the
5415 : Agave TPU client does not currently use it */
5416 0 : return 0;
5417 0 : }
5418 :
5419 : static ulong
5420 : fd_quic_handle_new_conn_id_frame(
5421 : fd_quic_frame_ctx_t * context,
5422 : fd_quic_new_conn_id_frame_t * data,
5423 : uchar const * p FD_PARAM_UNUSED,
5424 0 : ulong p_sz FD_PARAM_UNUSED ) {
5425 : /* FIXME This is a mandatory feature but we don't support it yet */
5426 0 : FD_DTRACE_PROBE_1( quic_handle_new_conn_id_frame, context->conn->our_conn_id );
5427 0 : (void)data;
5428 0 : return 0;
5429 0 : }
5430 :
5431 : static ulong
5432 : fd_quic_handle_retire_conn_id_frame(
5433 : fd_quic_frame_ctx_t * context,
5434 : fd_quic_retire_conn_id_frame_t * data,
5435 : uchar const * p FD_PARAM_UNUSED,
5436 0 : ulong p_sz FD_PARAM_UNUSED ) {
5437 : /* FIXME This is a mandatory feature but we don't support it yet */
5438 0 : FD_DTRACE_PROBE_1( quic_handle_retire_conn_id_frame, context->conn->our_conn_id );
5439 0 : (void)data;
5440 0 : FD_DEBUG( FD_LOG_DEBUG(( "retire_conn_id requested" )); )
5441 0 : return 0;
5442 0 : }
5443 :
5444 : static ulong
5445 : fd_quic_handle_path_challenge_frame(
5446 : fd_quic_frame_ctx_t * context,
5447 : fd_quic_path_challenge_frame_t * data,
5448 : uchar const * p FD_PARAM_UNUSED,
5449 0 : ulong p_sz FD_PARAM_UNUSED ) {
5450 : /* FIXME The recipient of this frame MUST generate a PATH_RESPONSE frame (Section 19.18) containing the same Data value. */
5451 0 : FD_DTRACE_PROBE_1( quic_handle_path_challenge_frame, context->conn->our_conn_id );
5452 0 : (void)data;
5453 0 : return 0UL;
5454 0 : }
5455 :
5456 : static ulong
5457 : fd_quic_handle_path_response_frame(
5458 : fd_quic_frame_ctx_t * context,
5459 : fd_quic_path_response_frame_t * data,
5460 : uchar const * p FD_PARAM_UNUSED,
5461 0 : ulong p_sz FD_PARAM_UNUSED ) {
5462 : /* We don't generate PATH_CHALLENGE frames, so this frame should never arrive */
5463 0 : FD_DTRACE_PROBE_1( quic_handle_path_response_frame, context->conn->our_conn_id );
5464 0 : (void)data;
5465 0 : return 0UL;
5466 0 : }
5467 :
5468 : static void
5469 6015 : fd_quic_handle_conn_close_frame( fd_quic_conn_t * conn ) {
5470 : /* frame type 0x1c means no error, or only error at quic level
5471 : frame type 0x1d means error at application layer
5472 : TODO provide APP with this info */
5473 6015 : FD_DEBUG( FD_LOG_DEBUG(( "peer requested close" )) );
5474 :
5475 6015 : switch( conn->state ) {
5476 0 : case FD_QUIC_CONN_STATE_PEER_CLOSE:
5477 0 : case FD_QUIC_CONN_STATE_ABORT:
5478 12 : case FD_QUIC_CONN_STATE_CLOSE_PENDING:
5479 12 : return;
5480 :
5481 6003 : default:
5482 6003 : fd_quic_set_conn_state( conn, FD_QUIC_CONN_STATE_PEER_CLOSE );
5483 6015 : }
5484 :
5485 6003 : conn->upd_pkt_number = FD_QUIC_PKT_NUM_PENDING;
5486 6003 : fd_quic_svc_schedule1( conn, FD_QUIC_SVC_INSTANT );
5487 6003 : }
5488 :
5489 : static ulong
5490 : fd_quic_handle_conn_close_0_frame(
5491 : fd_quic_frame_ctx_t * context,
5492 : fd_quic_conn_close_0_frame_t * data,
5493 : uchar const * p,
5494 0 : ulong p_sz ) {
5495 0 : (void)p;
5496 :
5497 0 : ulong reason_phrase_length = data->reason_phrase_length;
5498 0 : if( FD_UNLIKELY( reason_phrase_length > p_sz ) ) {
5499 0 : fd_quic_frame_error( context, FD_QUIC_CONN_REASON_FRAME_ENCODING_ERROR, __LINE__ );
5500 0 : return FD_QUIC_PARSE_FAIL;
5501 0 : }
5502 :
5503 : /* the information here can be invaluable for debugging */
5504 0 : FD_DEBUG(
5505 0 : char reason_buf[256] = {0};
5506 0 : ulong reason_len = fd_ulong_min( sizeof(reason_buf)-1, reason_phrase_length );
5507 0 : memcpy( reason_buf, p, reason_len );
5508 :
5509 0 : FD_LOG_WARNING(( "fd_quic_handle_conn_close_frame - "
5510 0 : "error_code: %lu "
5511 0 : "frame_type: %lx "
5512 0 : "reason: %s",
5513 0 : data->error_code,
5514 0 : data->frame_type,
5515 0 : reason_buf ));
5516 0 : );
5517 :
5518 0 : fd_quic_handle_conn_close_frame( context->conn );
5519 :
5520 0 : return reason_phrase_length;
5521 0 : }
5522 :
5523 : static ulong
5524 : fd_quic_handle_conn_close_1_frame(
5525 : fd_quic_frame_ctx_t * context,
5526 : fd_quic_conn_close_1_frame_t * data,
5527 : uchar const * p,
5528 6015 : ulong p_sz ) {
5529 6015 : (void)p;
5530 :
5531 6015 : ulong reason_phrase_length = data->reason_phrase_length;
5532 6015 : if( FD_UNLIKELY( reason_phrase_length > p_sz ) ) {
5533 0 : fd_quic_frame_error( context, FD_QUIC_CONN_REASON_FRAME_ENCODING_ERROR, __LINE__ );
5534 0 : return FD_QUIC_PARSE_FAIL;
5535 0 : }
5536 :
5537 : /* the information here can be invaluable for debugging */
5538 6015 : FD_DEBUG(
5539 6015 : char reason_buf[256] = {0};
5540 6015 : ulong reason_len = fd_ulong_min( sizeof(reason_buf)-1, reason_phrase_length );
5541 6015 : memcpy( reason_buf, p, reason_len );
5542 :
5543 6015 : FD_LOG_WARNING(( "fd_quic_handle_conn_close_frame - "
5544 6015 : "error_code: %lu "
5545 6015 : "reason: %s",
5546 6015 : data->error_code,
5547 6015 : reason_buf ));
5548 6015 : );
5549 :
5550 6015 : fd_quic_handle_conn_close_frame( context->conn );
5551 :
5552 6015 : return reason_phrase_length;
5553 6015 : }
5554 :
5555 : static ulong
5556 : fd_quic_handle_handshake_done_frame(
5557 : fd_quic_frame_ctx_t * context,
5558 : fd_quic_handshake_done_frame_t * data,
5559 : uchar const * p FD_PARAM_UNUSED,
5560 6021 : ulong p_sz FD_PARAM_UNUSED ) {
5561 6021 : fd_quic_conn_t * conn = context->conn;
5562 6021 : (void)data;
5563 :
5564 : /* servers must treat receipt of HANDSHAKE_DONE as a protocol violation */
5565 6021 : if( FD_UNLIKELY( conn->server ) ) {
5566 0 : fd_quic_frame_error( context, FD_QUIC_CONN_REASON_PROTOCOL_VIOLATION, __LINE__ );
5567 0 : return FD_QUIC_PARSE_FAIL;
5568 0 : }
5569 :
5570 6021 : if( conn->state == FD_QUIC_CONN_STATE_HANDSHAKE ) {
5571 : /* still handshaking... assume packet was reordered */
5572 0 : context->pkt->ack_flag |= ACK_FLAG_CANCEL;
5573 0 : return 0UL;
5574 6021 : } else if( conn->state != FD_QUIC_CONN_STATE_HANDSHAKE_COMPLETE ) {
5575 : /* duplicate frame or conn closing? */
5576 0 : return 0UL;
5577 0 : }
5578 :
5579 : /* Instantly acknowledge the first HANDSHAKE_DONE frame */
5580 6021 : fd_quic_svc_schedule1( conn, FD_QUIC_SVC_INSTANT );
5581 :
5582 : /* RFC 9001 4.9.2. Discarding Handshake Keys
5583 : > An endpoint MUST discard its Handshake keys when the
5584 : > TLS handshake is confirmed
5585 : RFC 9001 4.1.2. Handshake Confirmed
5586 : > At the client, the handshake is considered confirmed when a
5587 : > HANDSHAKE_DONE frame is received. */
5588 6021 : fd_quic_abandon_enc_level( conn, fd_quic_enc_level_handshake_id );
5589 :
5590 6021 : if( FD_UNLIKELY( !conn->tls_hs ) ) {
5591 : /* sanity check */
5592 0 : return 0;
5593 0 : }
5594 :
5595 : /* eliminate any remaining hs_data at application level */
5596 6021 : fd_quic_tls_hs_data_t * hs_data = NULL;
5597 :
5598 6021 : uint hs_enc_level = fd_quic_enc_level_appdata_id;
5599 6021 : hs_data = fd_quic_tls_get_hs_data( conn->tls_hs, hs_enc_level );
5600 : /* skip packets we've sent */
5601 6021 : while( hs_data ) {
5602 0 : fd_quic_tls_pop_hs_data( conn->tls_hs, hs_enc_level );
5603 :
5604 0 : hs_data = fd_quic_tls_get_hs_data( conn->tls_hs, hs_enc_level );
5605 0 : }
5606 :
5607 : /* we shouldn't be receiving this unless handshake is complete */
5608 6021 : fd_quic_set_conn_state( conn, FD_QUIC_CONN_STATE_ACTIVE );
5609 :
5610 : /* user callback */
5611 6021 : fd_quic_cb_conn_hs_complete( conn->quic, conn );
5612 :
5613 : /* Deallocate tls_hs once completed */
5614 6021 : if( FD_LIKELY( conn->tls_hs ) ) {
5615 6021 : fd_quic_state_t * state = fd_quic_get_state( conn->quic );
5616 6021 : fd_quic_tls_hs_delete( conn->tls_hs );
5617 6021 : fd_quic_tls_hs_cache_ele_remove( &state->hs_cache, conn->tls_hs, state->hs_pool );
5618 6021 : fd_quic_tls_hs_pool_ele_release( state->hs_pool, conn->tls_hs );
5619 6021 : conn->tls_hs = NULL;
5620 6021 : }
5621 :
5622 6021 : return 0;
5623 6021 : }
5624 :
5625 : /* initiate the shutdown of a connection
5626 : may select a reason code */
5627 : void
5628 : fd_quic_conn_close( fd_quic_conn_t * conn,
5629 6030 : uint app_reason ) {
5630 6030 : if( FD_UNLIKELY( !conn ) ) return;
5631 :
5632 6030 : switch( conn->state ) {
5633 0 : case FD_QUIC_CONN_STATE_INVALID:
5634 0 : case FD_QUIC_CONN_STATE_DEAD:
5635 0 : case FD_QUIC_CONN_STATE_ABORT:
5636 0 : return; /* close has no effect in these states */
5637 :
5638 6030 : default:
5639 6030 : {
5640 6030 : fd_quic_set_conn_state( conn, FD_QUIC_CONN_STATE_CLOSE_PENDING );
5641 6030 : conn->app_reason = app_reason;
5642 6030 : }
5643 6030 : }
5644 :
5645 : /* set connection to be serviced ASAP */
5646 6030 : fd_quic_svc_schedule1( conn, FD_QUIC_SVC_INSTANT );
5647 6030 : }
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